Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
2f2dc053 | 3 | |
496e5955 | 4 | #include <linux/fs.h> |
2f2dc053 | 5 | #include <linux/wait.h> |
5a0e3ad6 | 6 | #include <linux/slab.h> |
54008399 | 7 | #include <linux/gfp.h> |
2f2dc053 | 8 | #include <linux/sched.h> |
3d14c5d2 YS |
9 | #include <linux/debugfs.h> |
10 | #include <linux/seq_file.h> | |
3e0708b9 | 11 | #include <linux/ratelimit.h> |
9ba1e224 | 12 | #include <linux/bits.h> |
70c94820 | 13 | #include <linux/ktime.h> |
d517b398 | 14 | #include <linux/bitmap.h> |
9c2df227 | 15 | #include <linux/mnt_idmapping.h> |
2f2dc053 | 16 | |
2f2dc053 | 17 | #include "super.h" |
3d14c5d2 | 18 | #include "mds_client.h" |
2d332d5b | 19 | #include "crypto.h" |
3d14c5d2 | 20 | |
1fe60e51 | 21 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
22 | #include <linux/ceph/messenger.h> |
23 | #include <linux/ceph/decode.h> | |
24 | #include <linux/ceph/pagelist.h> | |
25 | #include <linux/ceph/auth.h> | |
26 | #include <linux/ceph/debugfs.h> | |
2f2dc053 | 27 | |
81c5a148 YZ |
28 | #define RECONNECT_MAX_SIZE (INT_MAX - PAGE_SIZE) |
29 | ||
2f2dc053 SW |
30 | /* |
31 | * A cluster of MDS (metadata server) daemons is responsible for | |
32 | * managing the file system namespace (the directory hierarchy and | |
33 | * inodes) and for coordinating shared access to storage. Metadata is | |
34 | * partitioning hierarchically across a number of servers, and that | |
35 | * partition varies over time as the cluster adjusts the distribution | |
36 | * in order to balance load. | |
37 | * | |
38 | * The MDS client is primarily responsible to managing synchronous | |
39 | * metadata requests for operations like open, unlink, and so forth. | |
40 | * If there is a MDS failure, we find out about it when we (possibly | |
41 | * request and) receive a new MDS map, and can resubmit affected | |
42 | * requests. | |
43 | * | |
44 | * For the most part, though, we take advantage of a lossless | |
45 | * communications channel to the MDS, and do not need to worry about | |
46 | * timing out or resubmitting requests. | |
47 | * | |
48 | * We maintain a stateful "session" with each MDS we interact with. | |
49 | * Within each session, we sent periodic heartbeat messages to ensure | |
50 | * any capabilities or leases we have been issues remain valid. If | |
51 | * the session times out and goes stale, our leases and capabilities | |
52 | * are no longer valid. | |
53 | */ | |
54 | ||
20cb34ae | 55 | struct ceph_reconnect_state { |
81c5a148 YZ |
56 | struct ceph_mds_session *session; |
57 | int nr_caps, nr_realms; | |
20cb34ae | 58 | struct ceph_pagelist *pagelist; |
121f22a1 | 59 | unsigned msg_version; |
81c5a148 | 60 | bool allow_multi; |
20cb34ae SW |
61 | }; |
62 | ||
2f2dc053 SW |
63 | static void __wake_requests(struct ceph_mds_client *mdsc, |
64 | struct list_head *head); | |
e3ec8d68 | 65 | static void ceph_cap_release_work(struct work_struct *work); |
37c4efc1 | 66 | static void ceph_cap_reclaim_work(struct work_struct *work); |
2f2dc053 | 67 | |
9e32789f | 68 | static const struct ceph_connection_operations mds_con_ops; |
2f2dc053 SW |
69 | |
70 | ||
71 | /* | |
72 | * mds reply parsing | |
73 | */ | |
74 | ||
b37fe1f9 YZ |
75 | static int parse_reply_info_quota(void **p, void *end, |
76 | struct ceph_mds_reply_info_in *info) | |
77 | { | |
78 | u8 struct_v, struct_compat; | |
79 | u32 struct_len; | |
80 | ||
81 | ceph_decode_8_safe(p, end, struct_v, bad); | |
82 | ceph_decode_8_safe(p, end, struct_compat, bad); | |
83 | /* struct_v is expected to be >= 1. we only | |
84 | * understand encoding with struct_compat == 1. */ | |
85 | if (!struct_v || struct_compat != 1) | |
86 | goto bad; | |
87 | ceph_decode_32_safe(p, end, struct_len, bad); | |
88 | ceph_decode_need(p, end, struct_len, bad); | |
89 | end = *p + struct_len; | |
90 | ceph_decode_64_safe(p, end, info->max_bytes, bad); | |
91 | ceph_decode_64_safe(p, end, info->max_files, bad); | |
92 | *p = end; | |
93 | return 0; | |
94 | bad: | |
95 | return -EIO; | |
96 | } | |
97 | ||
2f2dc053 SW |
98 | /* |
99 | * parse individual inode info | |
100 | */ | |
101 | static int parse_reply_info_in(void **p, void *end, | |
14303d20 | 102 | struct ceph_mds_reply_info_in *info, |
12b4629a | 103 | u64 features) |
2f2dc053 | 104 | { |
b37fe1f9 YZ |
105 | int err = 0; |
106 | u8 struct_v = 0; | |
2f2dc053 | 107 | |
b37fe1f9 YZ |
108 | if (features == (u64)-1) { |
109 | u32 struct_len; | |
110 | u8 struct_compat; | |
111 | ceph_decode_8_safe(p, end, struct_v, bad); | |
112 | ceph_decode_8_safe(p, end, struct_compat, bad); | |
113 | /* struct_v is expected to be >= 1. we only understand | |
114 | * encoding with struct_compat == 1. */ | |
115 | if (!struct_v || struct_compat != 1) | |
116 | goto bad; | |
117 | ceph_decode_32_safe(p, end, struct_len, bad); | |
118 | ceph_decode_need(p, end, struct_len, bad); | |
119 | end = *p + struct_len; | |
120 | } | |
121 | ||
122 | ceph_decode_need(p, end, sizeof(struct ceph_mds_reply_inode), bad); | |
2f2dc053 SW |
123 | info->in = *p; |
124 | *p += sizeof(struct ceph_mds_reply_inode) + | |
125 | sizeof(*info->in->fragtree.splits) * | |
126 | le32_to_cpu(info->in->fragtree.nsplits); | |
127 | ||
128 | ceph_decode_32_safe(p, end, info->symlink_len, bad); | |
129 | ceph_decode_need(p, end, info->symlink_len, bad); | |
130 | info->symlink = *p; | |
131 | *p += info->symlink_len; | |
132 | ||
23c625ce ID |
133 | ceph_decode_copy_safe(p, end, &info->dir_layout, |
134 | sizeof(info->dir_layout), bad); | |
2f2dc053 SW |
135 | ceph_decode_32_safe(p, end, info->xattr_len, bad); |
136 | ceph_decode_need(p, end, info->xattr_len, bad); | |
137 | info->xattr_data = *p; | |
138 | *p += info->xattr_len; | |
fb01d1f8 | 139 | |
b37fe1f9 YZ |
140 | if (features == (u64)-1) { |
141 | /* inline data */ | |
fb01d1f8 YZ |
142 | ceph_decode_64_safe(p, end, info->inline_version, bad); |
143 | ceph_decode_32_safe(p, end, info->inline_len, bad); | |
144 | ceph_decode_need(p, end, info->inline_len, bad); | |
145 | info->inline_data = *p; | |
146 | *p += info->inline_len; | |
b37fe1f9 YZ |
147 | /* quota */ |
148 | err = parse_reply_info_quota(p, end, info); | |
149 | if (err < 0) | |
150 | goto out_bad; | |
151 | /* pool namespace */ | |
152 | ceph_decode_32_safe(p, end, info->pool_ns_len, bad); | |
153 | if (info->pool_ns_len > 0) { | |
154 | ceph_decode_need(p, end, info->pool_ns_len, bad); | |
155 | info->pool_ns_data = *p; | |
156 | *p += info->pool_ns_len; | |
157 | } | |
245ce991 JL |
158 | |
159 | /* btime */ | |
160 | ceph_decode_need(p, end, sizeof(info->btime), bad); | |
161 | ceph_decode_copy(p, &info->btime, sizeof(info->btime)); | |
162 | ||
163 | /* change attribute */ | |
a35ead31 | 164 | ceph_decode_64_safe(p, end, info->change_attr, bad); |
fb01d1f8 | 165 | |
08796873 YZ |
166 | /* dir pin */ |
167 | if (struct_v >= 2) { | |
168 | ceph_decode_32_safe(p, end, info->dir_pin, bad); | |
169 | } else { | |
170 | info->dir_pin = -ENODATA; | |
171 | } | |
172 | ||
193e7b37 DD |
173 | /* snapshot birth time, remains zero for v<=2 */ |
174 | if (struct_v >= 3) { | |
175 | ceph_decode_need(p, end, sizeof(info->snap_btime), bad); | |
176 | ceph_decode_copy(p, &info->snap_btime, | |
177 | sizeof(info->snap_btime)); | |
178 | } else { | |
179 | memset(&info->snap_btime, 0, sizeof(info->snap_btime)); | |
180 | } | |
181 | ||
e7f72952 YC |
182 | /* snapshot count, remains zero for v<=3 */ |
183 | if (struct_v >= 4) { | |
184 | ceph_decode_64_safe(p, end, info->rsnaps, bad); | |
185 | } else { | |
186 | info->rsnaps = 0; | |
187 | } | |
188 | ||
2d332d5b JL |
189 | if (struct_v >= 5) { |
190 | u32 alen; | |
191 | ||
192 | ceph_decode_32_safe(p, end, alen, bad); | |
193 | ||
194 | while (alen--) { | |
195 | u32 len; | |
196 | ||
197 | /* key */ | |
198 | ceph_decode_32_safe(p, end, len, bad); | |
199 | ceph_decode_skip_n(p, end, len, bad); | |
200 | /* value */ | |
201 | ceph_decode_32_safe(p, end, len, bad); | |
202 | ceph_decode_skip_n(p, end, len, bad); | |
203 | } | |
204 | } | |
205 | ||
206 | /* fscrypt flag -- ignore */ | |
207 | if (struct_v >= 6) | |
208 | ceph_decode_skip_8(p, end, bad); | |
209 | ||
210 | info->fscrypt_auth = NULL; | |
211 | info->fscrypt_auth_len = 0; | |
212 | info->fscrypt_file = NULL; | |
213 | info->fscrypt_file_len = 0; | |
214 | if (struct_v >= 7) { | |
215 | ceph_decode_32_safe(p, end, info->fscrypt_auth_len, bad); | |
216 | if (info->fscrypt_auth_len) { | |
217 | info->fscrypt_auth = kmalloc(info->fscrypt_auth_len, | |
218 | GFP_KERNEL); | |
219 | if (!info->fscrypt_auth) | |
220 | return -ENOMEM; | |
221 | ceph_decode_copy_safe(p, end, info->fscrypt_auth, | |
222 | info->fscrypt_auth_len, bad); | |
223 | } | |
224 | ceph_decode_32_safe(p, end, info->fscrypt_file_len, bad); | |
225 | if (info->fscrypt_file_len) { | |
226 | info->fscrypt_file = kmalloc(info->fscrypt_file_len, | |
227 | GFP_KERNEL); | |
228 | if (!info->fscrypt_file) | |
229 | return -ENOMEM; | |
230 | ceph_decode_copy_safe(p, end, info->fscrypt_file, | |
231 | info->fscrypt_file_len, bad); | |
232 | } | |
233 | } | |
b37fe1f9 YZ |
234 | *p = end; |
235 | } else { | |
2d332d5b | 236 | /* legacy (unversioned) struct */ |
b37fe1f9 YZ |
237 | if (features & CEPH_FEATURE_MDS_INLINE_DATA) { |
238 | ceph_decode_64_safe(p, end, info->inline_version, bad); | |
239 | ceph_decode_32_safe(p, end, info->inline_len, bad); | |
240 | ceph_decode_need(p, end, info->inline_len, bad); | |
241 | info->inline_data = *p; | |
242 | *p += info->inline_len; | |
243 | } else | |
244 | info->inline_version = CEPH_INLINE_NONE; | |
245 | ||
246 | if (features & CEPH_FEATURE_MDS_QUOTA) { | |
247 | err = parse_reply_info_quota(p, end, info); | |
248 | if (err < 0) | |
249 | goto out_bad; | |
250 | } else { | |
251 | info->max_bytes = 0; | |
252 | info->max_files = 0; | |
253 | } | |
254 | ||
255 | info->pool_ns_len = 0; | |
256 | info->pool_ns_data = NULL; | |
257 | if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) { | |
258 | ceph_decode_32_safe(p, end, info->pool_ns_len, bad); | |
259 | if (info->pool_ns_len > 0) { | |
260 | ceph_decode_need(p, end, info->pool_ns_len, bad); | |
261 | info->pool_ns_data = *p; | |
262 | *p += info->pool_ns_len; | |
263 | } | |
264 | } | |
08796873 | 265 | |
245ce991 JL |
266 | if (features & CEPH_FEATURE_FS_BTIME) { |
267 | ceph_decode_need(p, end, sizeof(info->btime), bad); | |
268 | ceph_decode_copy(p, &info->btime, sizeof(info->btime)); | |
a35ead31 | 269 | ceph_decode_64_safe(p, end, info->change_attr, bad); |
245ce991 JL |
270 | } |
271 | ||
08796873 | 272 | info->dir_pin = -ENODATA; |
e7f72952 | 273 | /* info->snap_btime and info->rsnaps remain zero */ |
b37fe1f9 YZ |
274 | } |
275 | return 0; | |
276 | bad: | |
277 | err = -EIO; | |
278 | out_bad: | |
279 | return err; | |
280 | } | |
281 | ||
282 | static int parse_reply_info_dir(void **p, void *end, | |
283 | struct ceph_mds_reply_dirfrag **dirfrag, | |
284 | u64 features) | |
285 | { | |
286 | if (features == (u64)-1) { | |
fb18a575 LH |
287 | u8 struct_v, struct_compat; |
288 | u32 struct_len; | |
fb18a575 LH |
289 | ceph_decode_8_safe(p, end, struct_v, bad); |
290 | ceph_decode_8_safe(p, end, struct_compat, bad); | |
b37fe1f9 YZ |
291 | /* struct_v is expected to be >= 1. we only understand |
292 | * encoding whose struct_compat == 1. */ | |
293 | if (!struct_v || struct_compat != 1) | |
fb18a575 LH |
294 | goto bad; |
295 | ceph_decode_32_safe(p, end, struct_len, bad); | |
296 | ceph_decode_need(p, end, struct_len, bad); | |
b37fe1f9 | 297 | end = *p + struct_len; |
fb18a575 LH |
298 | } |
299 | ||
b37fe1f9 YZ |
300 | ceph_decode_need(p, end, sizeof(**dirfrag), bad); |
301 | *dirfrag = *p; | |
302 | *p += sizeof(**dirfrag) + sizeof(u32) * le32_to_cpu((*dirfrag)->ndist); | |
303 | if (unlikely(*p > end)) | |
304 | goto bad; | |
305 | if (features == (u64)-1) | |
306 | *p = end; | |
307 | return 0; | |
308 | bad: | |
309 | return -EIO; | |
310 | } | |
311 | ||
312 | static int parse_reply_info_lease(void **p, void *end, | |
313 | struct ceph_mds_reply_lease **lease, | |
4ac4c23e | 314 | u64 features, u32 *altname_len, u8 **altname) |
b37fe1f9 | 315 | { |
4ac4c23e JL |
316 | u8 struct_v; |
317 | u32 struct_len; | |
318 | void *lend; | |
319 | ||
b37fe1f9 | 320 | if (features == (u64)-1) { |
4ac4c23e JL |
321 | u8 struct_compat; |
322 | ||
b37fe1f9 YZ |
323 | ceph_decode_8_safe(p, end, struct_v, bad); |
324 | ceph_decode_8_safe(p, end, struct_compat, bad); | |
4ac4c23e | 325 | |
b37fe1f9 YZ |
326 | /* struct_v is expected to be >= 1. we only understand |
327 | * encoding whose struct_compat == 1. */ | |
328 | if (!struct_v || struct_compat != 1) | |
329 | goto bad; | |
4ac4c23e | 330 | |
b37fe1f9 | 331 | ceph_decode_32_safe(p, end, struct_len, bad); |
4ac4c23e JL |
332 | } else { |
333 | struct_len = sizeof(**lease); | |
334 | *altname_len = 0; | |
335 | *altname = NULL; | |
5ea5c5e0 YZ |
336 | } |
337 | ||
4ac4c23e JL |
338 | lend = *p + struct_len; |
339 | ceph_decode_need(p, end, struct_len, bad); | |
b37fe1f9 YZ |
340 | *lease = *p; |
341 | *p += sizeof(**lease); | |
4ac4c23e JL |
342 | |
343 | if (features == (u64)-1) { | |
344 | if (struct_v >= 2) { | |
345 | ceph_decode_32_safe(p, end, *altname_len, bad); | |
346 | ceph_decode_need(p, end, *altname_len, bad); | |
347 | *altname = *p; | |
348 | *p += *altname_len; | |
349 | } else { | |
350 | *altname = NULL; | |
351 | *altname_len = 0; | |
352 | } | |
353 | } | |
354 | *p = lend; | |
2f2dc053 SW |
355 | return 0; |
356 | bad: | |
b37fe1f9 | 357 | return -EIO; |
2f2dc053 SW |
358 | } |
359 | ||
360 | /* | |
361 | * parse a normal reply, which may contain a (dir+)dentry and/or a | |
362 | * target inode. | |
363 | */ | |
364 | static int parse_reply_info_trace(void **p, void *end, | |
14303d20 | 365 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 366 | u64 features) |
2f2dc053 SW |
367 | { |
368 | int err; | |
369 | ||
370 | if (info->head->is_dentry) { | |
14303d20 | 371 | err = parse_reply_info_in(p, end, &info->diri, features); |
2f2dc053 SW |
372 | if (err < 0) |
373 | goto out_bad; | |
374 | ||
b37fe1f9 YZ |
375 | err = parse_reply_info_dir(p, end, &info->dirfrag, features); |
376 | if (err < 0) | |
377 | goto out_bad; | |
2f2dc053 SW |
378 | |
379 | ceph_decode_32_safe(p, end, info->dname_len, bad); | |
380 | ceph_decode_need(p, end, info->dname_len, bad); | |
381 | info->dname = *p; | |
382 | *p += info->dname_len; | |
b37fe1f9 | 383 | |
4ac4c23e JL |
384 | err = parse_reply_info_lease(p, end, &info->dlease, features, |
385 | &info->altname_len, &info->altname); | |
b37fe1f9 YZ |
386 | if (err < 0) |
387 | goto out_bad; | |
2f2dc053 SW |
388 | } |
389 | ||
390 | if (info->head->is_target) { | |
14303d20 | 391 | err = parse_reply_info_in(p, end, &info->targeti, features); |
2f2dc053 SW |
392 | if (err < 0) |
393 | goto out_bad; | |
394 | } | |
395 | ||
396 | if (unlikely(*p != end)) | |
397 | goto bad; | |
398 | return 0; | |
399 | ||
400 | bad: | |
401 | err = -EIO; | |
402 | out_bad: | |
403 | pr_err("problem parsing mds trace %d\n", err); | |
404 | return err; | |
405 | } | |
406 | ||
407 | /* | |
408 | * parse readdir results | |
409 | */ | |
b37fe1f9 | 410 | static int parse_reply_info_readdir(void **p, void *end, |
3859af9e XL |
411 | struct ceph_mds_request *req, |
412 | u64 features) | |
2f2dc053 | 413 | { |
3859af9e | 414 | struct ceph_mds_reply_info_parsed *info = &req->r_reply_info; |
38d46409 | 415 | struct ceph_client *cl = req->r_mdsc->fsc->client; |
2f2dc053 SW |
416 | u32 num, i = 0; |
417 | int err; | |
418 | ||
b37fe1f9 YZ |
419 | err = parse_reply_info_dir(p, end, &info->dir_dir, features); |
420 | if (err < 0) | |
421 | goto out_bad; | |
2f2dc053 SW |
422 | |
423 | ceph_decode_need(p, end, sizeof(num) + 2, bad); | |
c89136ea | 424 | num = ceph_decode_32(p); |
956d39d6 YZ |
425 | { |
426 | u16 flags = ceph_decode_16(p); | |
427 | info->dir_end = !!(flags & CEPH_READDIR_FRAG_END); | |
428 | info->dir_complete = !!(flags & CEPH_READDIR_FRAG_COMPLETE); | |
f3c4ebe6 | 429 | info->hash_order = !!(flags & CEPH_READDIR_HASH_ORDER); |
79162547 | 430 | info->offset_hash = !!(flags & CEPH_READDIR_OFFSET_HASH); |
956d39d6 | 431 | } |
2f2dc053 SW |
432 | if (num == 0) |
433 | goto done; | |
434 | ||
2a5beea3 YZ |
435 | BUG_ON(!info->dir_entries); |
436 | if ((unsigned long)(info->dir_entries + num) > | |
437 | (unsigned long)info->dir_entries + info->dir_buf_size) { | |
38d46409 | 438 | pr_err_client(cl, "dir contents are larger than expected\n"); |
54008399 YZ |
439 | WARN_ON(1); |
440 | goto bad; | |
441 | } | |
2f2dc053 | 442 | |
54008399 | 443 | info->dir_nr = num; |
2f2dc053 | 444 | while (num) { |
af9ffa6d XL |
445 | struct inode *inode = d_inode(req->r_dentry); |
446 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2a5beea3 | 447 | struct ceph_mds_reply_dir_entry *rde = info->dir_entries + i; |
af9ffa6d XL |
448 | struct fscrypt_str tname = FSTR_INIT(NULL, 0); |
449 | struct fscrypt_str oname = FSTR_INIT(NULL, 0); | |
450 | struct ceph_fname fname; | |
451 | u32 altname_len, _name_len; | |
452 | u8 *altname, *_name; | |
453 | ||
2f2dc053 | 454 | /* dentry */ |
af9ffa6d XL |
455 | ceph_decode_32_safe(p, end, _name_len, bad); |
456 | ceph_decode_need(p, end, _name_len, bad); | |
457 | _name = *p; | |
458 | *p += _name_len; | |
38d46409 | 459 | doutc(cl, "parsed dir dname '%.*s'\n", _name_len, _name); |
af9ffa6d XL |
460 | |
461 | if (info->hash_order) | |
462 | rde->raw_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, | |
463 | _name, _name_len); | |
2f2dc053 | 464 | |
b37fe1f9 | 465 | /* dentry lease */ |
4ac4c23e | 466 | err = parse_reply_info_lease(p, end, &rde->lease, features, |
af9ffa6d | 467 | &altname_len, &altname); |
b37fe1f9 YZ |
468 | if (err) |
469 | goto out_bad; | |
4ac4c23e | 470 | |
af9ffa6d XL |
471 | /* |
472 | * Try to dencrypt the dentry names and update them | |
473 | * in the ceph_mds_reply_dir_entry struct. | |
474 | */ | |
475 | fname.dir = inode; | |
476 | fname.name = _name; | |
477 | fname.name_len = _name_len; | |
478 | fname.ctext = altname; | |
479 | fname.ctext_len = altname_len; | |
480 | /* | |
481 | * The _name_len maybe larger than altname_len, such as | |
482 | * when the human readable name length is in range of | |
483 | * (CEPH_NOHASH_NAME_MAX, CEPH_NOHASH_NAME_MAX + SHA256_DIGEST_SIZE), | |
484 | * then the copy in ceph_fname_to_usr will corrupt the | |
485 | * data if there has no encryption key. | |
486 | * | |
487 | * Just set the no_copy flag and then if there has no | |
488 | * encryption key the oname.name will be assigned to | |
489 | * _name always. | |
490 | */ | |
491 | fname.no_copy = true; | |
492 | if (altname_len == 0) { | |
493 | /* | |
494 | * Set tname to _name, and this will be used | |
495 | * to do the base64_decode in-place. It's | |
496 | * safe because the decoded string should | |
497 | * always be shorter, which is 3/4 of origin | |
498 | * string. | |
499 | */ | |
500 | tname.name = _name; | |
501 | ||
502 | /* | |
503 | * Set oname to _name too, and this will be | |
504 | * used to do the dencryption in-place. | |
505 | */ | |
506 | oname.name = _name; | |
507 | oname.len = _name_len; | |
508 | } else { | |
509 | /* | |
510 | * This will do the decryption only in-place | |
511 | * from altname cryptext directly. | |
512 | */ | |
513 | oname.name = altname; | |
514 | oname.len = altname_len; | |
515 | } | |
516 | rde->is_nokey = false; | |
517 | err = ceph_fname_to_usr(&fname, &tname, &oname, &rde->is_nokey); | |
518 | if (err) { | |
38d46409 XL |
519 | pr_err_client(cl, "unable to decode %.*s, got %d\n", |
520 | _name_len, _name, err); | |
af9ffa6d XL |
521 | goto out_bad; |
522 | } | |
523 | rde->name = oname.name; | |
524 | rde->name_len = oname.len; | |
525 | ||
2f2dc053 | 526 | /* inode */ |
2a5beea3 | 527 | err = parse_reply_info_in(p, end, &rde->inode, features); |
2f2dc053 SW |
528 | if (err < 0) |
529 | goto out_bad; | |
8974eebd YZ |
530 | /* ceph_readdir_prepopulate() will update it */ |
531 | rde->offset = 0; | |
2f2dc053 SW |
532 | i++; |
533 | num--; | |
534 | } | |
535 | ||
536 | done: | |
1d3f8723 JL |
537 | /* Skip over any unrecognized fields */ |
538 | *p = end; | |
2f2dc053 SW |
539 | return 0; |
540 | ||
541 | bad: | |
542 | err = -EIO; | |
543 | out_bad: | |
38d46409 | 544 | pr_err_client(cl, "problem parsing dir contents %d\n", err); |
2f2dc053 SW |
545 | return err; |
546 | } | |
547 | ||
25933abd HS |
548 | /* |
549 | * parse fcntl F_GETLK results | |
550 | */ | |
551 | static int parse_reply_info_filelock(void **p, void *end, | |
14303d20 | 552 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 553 | u64 features) |
25933abd HS |
554 | { |
555 | if (*p + sizeof(*info->filelock_reply) > end) | |
556 | goto bad; | |
557 | ||
558 | info->filelock_reply = *p; | |
25933abd | 559 | |
1d3f8723 JL |
560 | /* Skip over any unrecognized fields */ |
561 | *p = end; | |
25933abd | 562 | return 0; |
25933abd HS |
563 | bad: |
564 | return -EIO; | |
565 | } | |
566 | ||
d4846487 JL |
567 | |
568 | #if BITS_PER_LONG == 64 | |
569 | ||
570 | #define DELEGATED_INO_AVAILABLE xa_mk_value(1) | |
571 | ||
572 | static int ceph_parse_deleg_inos(void **p, void *end, | |
573 | struct ceph_mds_session *s) | |
574 | { | |
38d46409 | 575 | struct ceph_client *cl = s->s_mdsc->fsc->client; |
d4846487 JL |
576 | u32 sets; |
577 | ||
578 | ceph_decode_32_safe(p, end, sets, bad); | |
38d46409 | 579 | doutc(cl, "got %u sets of delegated inodes\n", sets); |
d4846487 | 580 | while (sets--) { |
2ecd0edd | 581 | u64 start, len; |
d4846487 JL |
582 | |
583 | ceph_decode_64_safe(p, end, start, bad); | |
584 | ceph_decode_64_safe(p, end, len, bad); | |
d4f6b31d JL |
585 | |
586 | /* Don't accept a delegation of system inodes */ | |
587 | if (start < CEPH_INO_SYSTEM_BASE) { | |
38d46409 XL |
588 | pr_warn_ratelimited_client(cl, |
589 | "ignoring reserved inode range delegation (start=0x%llx len=0x%llx)\n", | |
590 | start, len); | |
d4f6b31d JL |
591 | continue; |
592 | } | |
d4846487 | 593 | while (len--) { |
2ecd0edd | 594 | int err = xa_insert(&s->s_delegated_inos, start++, |
d4846487 JL |
595 | DELEGATED_INO_AVAILABLE, |
596 | GFP_KERNEL); | |
597 | if (!err) { | |
38d46409 | 598 | doutc(cl, "added delegated inode 0x%llx\n", start - 1); |
d4846487 | 599 | } else if (err == -EBUSY) { |
38d46409 XL |
600 | pr_warn_client(cl, |
601 | "MDS delegated inode 0x%llx more than once.\n", | |
d4846487 JL |
602 | start - 1); |
603 | } else { | |
604 | return err; | |
605 | } | |
606 | } | |
607 | } | |
608 | return 0; | |
609 | bad: | |
610 | return -EIO; | |
611 | } | |
612 | ||
613 | u64 ceph_get_deleg_ino(struct ceph_mds_session *s) | |
614 | { | |
615 | unsigned long ino; | |
616 | void *val; | |
617 | ||
618 | xa_for_each(&s->s_delegated_inos, ino, val) { | |
619 | val = xa_erase(&s->s_delegated_inos, ino); | |
620 | if (val == DELEGATED_INO_AVAILABLE) | |
621 | return ino; | |
622 | } | |
623 | return 0; | |
624 | } | |
625 | ||
626 | int ceph_restore_deleg_ino(struct ceph_mds_session *s, u64 ino) | |
627 | { | |
628 | return xa_insert(&s->s_delegated_inos, ino, DELEGATED_INO_AVAILABLE, | |
629 | GFP_KERNEL); | |
630 | } | |
631 | #else /* BITS_PER_LONG == 64 */ | |
632 | /* | |
633 | * FIXME: xarrays can't handle 64-bit indexes on a 32-bit arch. For now, just | |
634 | * ignore delegated_inos on 32 bit arch. Maybe eventually add xarrays for top | |
635 | * and bottom words? | |
636 | */ | |
637 | static int ceph_parse_deleg_inos(void **p, void *end, | |
638 | struct ceph_mds_session *s) | |
639 | { | |
640 | u32 sets; | |
641 | ||
642 | ceph_decode_32_safe(p, end, sets, bad); | |
643 | if (sets) | |
644 | ceph_decode_skip_n(p, end, sets * 2 * sizeof(__le64), bad); | |
645 | return 0; | |
646 | bad: | |
647 | return -EIO; | |
648 | } | |
649 | ||
650 | u64 ceph_get_deleg_ino(struct ceph_mds_session *s) | |
651 | { | |
652 | return 0; | |
653 | } | |
654 | ||
655 | int ceph_restore_deleg_ino(struct ceph_mds_session *s, u64 ino) | |
656 | { | |
657 | return 0; | |
658 | } | |
659 | #endif /* BITS_PER_LONG == 64 */ | |
660 | ||
6e8575fa SL |
661 | /* |
662 | * parse create results | |
663 | */ | |
664 | static int parse_reply_info_create(void **p, void *end, | |
665 | struct ceph_mds_reply_info_parsed *info, | |
d4846487 | 666 | u64 features, struct ceph_mds_session *s) |
6e8575fa | 667 | { |
d4846487 JL |
668 | int ret; |
669 | ||
b37fe1f9 YZ |
670 | if (features == (u64)-1 || |
671 | (features & CEPH_FEATURE_REPLY_CREATE_INODE)) { | |
6e8575fa | 672 | if (*p == end) { |
d4846487 | 673 | /* Malformed reply? */ |
6e8575fa | 674 | info->has_create_ino = false; |
d4846487 | 675 | } else if (test_bit(CEPHFS_FEATURE_DELEG_INO, &s->s_features)) { |
6e8575fa | 676 | info->has_create_ino = true; |
06a1ad43 JL |
677 | /* struct_v, struct_compat, and len */ |
678 | ceph_decode_skip_n(p, end, 2 + sizeof(u32), bad); | |
d4846487 JL |
679 | ceph_decode_64_safe(p, end, info->ino, bad); |
680 | ret = ceph_parse_deleg_inos(p, end, s); | |
681 | if (ret) | |
682 | return ret; | |
683 | } else { | |
684 | /* legacy */ | |
1d3f8723 | 685 | ceph_decode_64_safe(p, end, info->ino, bad); |
d4846487 | 686 | info->has_create_ino = true; |
6e8575fa | 687 | } |
1d3f8723 JL |
688 | } else { |
689 | if (*p != end) | |
690 | goto bad; | |
6e8575fa SL |
691 | } |
692 | ||
1d3f8723 JL |
693 | /* Skip over any unrecognized fields */ |
694 | *p = end; | |
6e8575fa | 695 | return 0; |
6e8575fa SL |
696 | bad: |
697 | return -EIO; | |
698 | } | |
699 | ||
6ddf5f16 MC |
700 | static int parse_reply_info_getvxattr(void **p, void *end, |
701 | struct ceph_mds_reply_info_parsed *info, | |
702 | u64 features) | |
703 | { | |
704 | u32 value_len; | |
705 | ||
706 | ceph_decode_skip_8(p, end, bad); /* skip current version: 1 */ | |
707 | ceph_decode_skip_8(p, end, bad); /* skip first version: 1 */ | |
708 | ceph_decode_skip_32(p, end, bad); /* skip payload length */ | |
709 | ||
710 | ceph_decode_32_safe(p, end, value_len, bad); | |
711 | ||
712 | if (value_len == end - *p) { | |
713 | info->xattr_info.xattr_value = *p; | |
714 | info->xattr_info.xattr_value_len = value_len; | |
715 | *p = end; | |
716 | return value_len; | |
717 | } | |
718 | bad: | |
719 | return -EIO; | |
720 | } | |
721 | ||
25933abd HS |
722 | /* |
723 | * parse extra results | |
724 | */ | |
725 | static int parse_reply_info_extra(void **p, void *end, | |
3859af9e | 726 | struct ceph_mds_request *req, |
d4846487 | 727 | u64 features, struct ceph_mds_session *s) |
25933abd | 728 | { |
3859af9e | 729 | struct ceph_mds_reply_info_parsed *info = &req->r_reply_info; |
6df8c9d8 JL |
730 | u32 op = le32_to_cpu(info->head->op); |
731 | ||
732 | if (op == CEPH_MDS_OP_GETFILELOCK) | |
14303d20 | 733 | return parse_reply_info_filelock(p, end, info, features); |
6df8c9d8 | 734 | else if (op == CEPH_MDS_OP_READDIR || op == CEPH_MDS_OP_LSSNAP) |
3859af9e | 735 | return parse_reply_info_readdir(p, end, req, features); |
6df8c9d8 | 736 | else if (op == CEPH_MDS_OP_CREATE) |
d4846487 | 737 | return parse_reply_info_create(p, end, info, features, s); |
6ddf5f16 MC |
738 | else if (op == CEPH_MDS_OP_GETVXATTR) |
739 | return parse_reply_info_getvxattr(p, end, info, features); | |
6e8575fa SL |
740 | else |
741 | return -EIO; | |
25933abd HS |
742 | } |
743 | ||
2f2dc053 SW |
744 | /* |
745 | * parse entire mds reply | |
746 | */ | |
d4846487 | 747 | static int parse_reply_info(struct ceph_mds_session *s, struct ceph_msg *msg, |
3859af9e | 748 | struct ceph_mds_request *req, u64 features) |
2f2dc053 | 749 | { |
3859af9e | 750 | struct ceph_mds_reply_info_parsed *info = &req->r_reply_info; |
38d46409 | 751 | struct ceph_client *cl = s->s_mdsc->fsc->client; |
2f2dc053 SW |
752 | void *p, *end; |
753 | u32 len; | |
754 | int err; | |
755 | ||
756 | info->head = msg->front.iov_base; | |
757 | p = msg->front.iov_base + sizeof(struct ceph_mds_reply_head); | |
758 | end = p + msg->front.iov_len - sizeof(struct ceph_mds_reply_head); | |
759 | ||
760 | /* trace */ | |
761 | ceph_decode_32_safe(&p, end, len, bad); | |
762 | if (len > 0) { | |
32852a81 | 763 | ceph_decode_need(&p, end, len, bad); |
14303d20 | 764 | err = parse_reply_info_trace(&p, p+len, info, features); |
2f2dc053 SW |
765 | if (err < 0) |
766 | goto out_bad; | |
767 | } | |
768 | ||
25933abd | 769 | /* extra */ |
2f2dc053 SW |
770 | ceph_decode_32_safe(&p, end, len, bad); |
771 | if (len > 0) { | |
32852a81 | 772 | ceph_decode_need(&p, end, len, bad); |
3859af9e | 773 | err = parse_reply_info_extra(&p, p+len, req, features, s); |
2f2dc053 SW |
774 | if (err < 0) |
775 | goto out_bad; | |
776 | } | |
777 | ||
778 | /* snap blob */ | |
779 | ceph_decode_32_safe(&p, end, len, bad); | |
780 | info->snapblob_len = len; | |
781 | info->snapblob = p; | |
782 | p += len; | |
783 | ||
784 | if (p != end) | |
785 | goto bad; | |
786 | return 0; | |
787 | ||
788 | bad: | |
789 | err = -EIO; | |
790 | out_bad: | |
38d46409 | 791 | pr_err_client(cl, "mds parse_reply err %d\n", err); |
8b0da5c5 | 792 | ceph_msg_dump(msg); |
2f2dc053 SW |
793 | return err; |
794 | } | |
795 | ||
796 | static void destroy_reply_info(struct ceph_mds_reply_info_parsed *info) | |
797 | { | |
2d332d5b JL |
798 | int i; |
799 | ||
800 | kfree(info->diri.fscrypt_auth); | |
801 | kfree(info->diri.fscrypt_file); | |
802 | kfree(info->targeti.fscrypt_auth); | |
803 | kfree(info->targeti.fscrypt_file); | |
2a5beea3 | 804 | if (!info->dir_entries) |
54008399 | 805 | return; |
2d332d5b JL |
806 | |
807 | for (i = 0; i < info->dir_nr; i++) { | |
808 | struct ceph_mds_reply_dir_entry *rde = info->dir_entries + i; | |
809 | ||
810 | kfree(rde->inode.fscrypt_auth); | |
811 | kfree(rde->inode.fscrypt_file); | |
812 | } | |
2a5beea3 | 813 | free_pages((unsigned long)info->dir_entries, get_order(info->dir_buf_size)); |
2f2dc053 SW |
814 | } |
815 | ||
4868e537 XL |
816 | /* |
817 | * In async unlink case the kclient won't wait for the first reply | |
818 | * from MDS and just drop all the links and unhash the dentry and then | |
819 | * succeeds immediately. | |
820 | * | |
821 | * For any new create/link/rename,etc requests followed by using the | |
822 | * same file names we must wait for the first reply of the inflight | |
823 | * unlink request, or the MDS possibly will fail these following | |
824 | * requests with -EEXIST if the inflight async unlink request was | |
825 | * delayed for some reasons. | |
826 | * | |
827 | * And the worst case is that for the none async openc request it will | |
828 | * successfully open the file if the CDentry hasn't been unlinked yet, | |
829 | * but later the previous delayed async unlink request will remove the | |
830 | * CDenty. That means the just created file is possiblly deleted later | |
831 | * by accident. | |
832 | * | |
833 | * We need to wait for the inflight async unlink requests to finish | |
834 | * when creating new files/directories by using the same file names. | |
835 | */ | |
836 | int ceph_wait_on_conflict_unlink(struct dentry *dentry) | |
837 | { | |
5995d90d | 838 | struct ceph_fs_client *fsc = ceph_sb_to_fs_client(dentry->d_sb); |
38d46409 | 839 | struct ceph_client *cl = fsc->client; |
4868e537 XL |
840 | struct dentry *pdentry = dentry->d_parent; |
841 | struct dentry *udentry, *found = NULL; | |
842 | struct ceph_dentry_info *di; | |
843 | struct qstr dname; | |
844 | u32 hash = dentry->d_name.hash; | |
845 | int err; | |
846 | ||
847 | dname.name = dentry->d_name.name; | |
848 | dname.len = dentry->d_name.len; | |
849 | ||
850 | rcu_read_lock(); | |
851 | hash_for_each_possible_rcu(fsc->async_unlink_conflict, di, | |
852 | hnode, hash) { | |
853 | udentry = di->dentry; | |
854 | ||
855 | spin_lock(&udentry->d_lock); | |
856 | if (udentry->d_name.hash != hash) | |
857 | goto next; | |
858 | if (unlikely(udentry->d_parent != pdentry)) | |
859 | goto next; | |
860 | if (!hash_hashed(&di->hnode)) | |
861 | goto next; | |
862 | ||
863 | if (!test_bit(CEPH_DENTRY_ASYNC_UNLINK_BIT, &di->flags)) | |
38d46409 XL |
864 | pr_warn_client(cl, "dentry %p:%pd async unlink bit is not set\n", |
865 | dentry, dentry); | |
4868e537 XL |
866 | |
867 | if (!d_same_name(udentry, pdentry, &dname)) | |
868 | goto next; | |
869 | ||
dc32464a | 870 | found = dget_dlock(udentry); |
4868e537 | 871 | spin_unlock(&udentry->d_lock); |
4868e537 XL |
872 | break; |
873 | next: | |
874 | spin_unlock(&udentry->d_lock); | |
875 | } | |
876 | rcu_read_unlock(); | |
877 | ||
878 | if (likely(!found)) | |
879 | return 0; | |
880 | ||
38d46409 XL |
881 | doutc(cl, "dentry %p:%pd conflict with old %p:%pd\n", dentry, dentry, |
882 | found, found); | |
4868e537 XL |
883 | |
884 | err = wait_on_bit(&di->flags, CEPH_DENTRY_ASYNC_UNLINK_BIT, | |
885 | TASK_KILLABLE); | |
886 | dput(found); | |
887 | return err; | |
888 | } | |
889 | ||
2f2dc053 SW |
890 | |
891 | /* | |
892 | * sessions | |
893 | */ | |
a687ecaf | 894 | const char *ceph_session_state_name(int s) |
2f2dc053 SW |
895 | { |
896 | switch (s) { | |
897 | case CEPH_MDS_SESSION_NEW: return "new"; | |
898 | case CEPH_MDS_SESSION_OPENING: return "opening"; | |
899 | case CEPH_MDS_SESSION_OPEN: return "open"; | |
900 | case CEPH_MDS_SESSION_HUNG: return "hung"; | |
901 | case CEPH_MDS_SESSION_CLOSING: return "closing"; | |
4d681c2f | 902 | case CEPH_MDS_SESSION_CLOSED: return "closed"; |
44ca18f2 | 903 | case CEPH_MDS_SESSION_RESTARTING: return "restarting"; |
2f2dc053 | 904 | case CEPH_MDS_SESSION_RECONNECTING: return "reconnecting"; |
fcff415c | 905 | case CEPH_MDS_SESSION_REJECTED: return "rejected"; |
2f2dc053 SW |
906 | default: return "???"; |
907 | } | |
908 | } | |
909 | ||
5b3248c6 | 910 | struct ceph_mds_session *ceph_get_mds_session(struct ceph_mds_session *s) |
2f2dc053 | 911 | { |
9f358999 | 912 | if (refcount_inc_not_zero(&s->s_ref)) |
2f2dc053 | 913 | return s; |
9f358999 | 914 | return NULL; |
2f2dc053 SW |
915 | } |
916 | ||
917 | void ceph_put_mds_session(struct ceph_mds_session *s) | |
918 | { | |
7e65624d JL |
919 | if (IS_ERR_OR_NULL(s)) |
920 | return; | |
921 | ||
3997c01d | 922 | if (refcount_dec_and_test(&s->s_ref)) { |
6c4a1915 | 923 | if (s->s_auth.authorizer) |
6c1ea260 | 924 | ceph_auth_destroy_authorizer(s->s_auth.authorizer); |
88828190 | 925 | WARN_ON(mutex_is_locked(&s->s_mutex)); |
d4846487 | 926 | xa_destroy(&s->s_delegated_inos); |
2f2dc053 | 927 | kfree(s); |
4e7a5dcd | 928 | } |
2f2dc053 SW |
929 | } |
930 | ||
931 | /* | |
932 | * called under mdsc->mutex | |
933 | */ | |
934 | struct ceph_mds_session *__ceph_lookup_mds_session(struct ceph_mds_client *mdsc, | |
935 | int mds) | |
936 | { | |
d37b1d99 | 937 | if (mds >= mdsc->max_sessions || !mdsc->sessions[mds]) |
2f2dc053 | 938 | return NULL; |
5b3248c6 | 939 | return ceph_get_mds_session(mdsc->sessions[mds]); |
2f2dc053 SW |
940 | } |
941 | ||
942 | static bool __have_session(struct ceph_mds_client *mdsc, int mds) | |
943 | { | |
98cfda81 | 944 | if (mds >= mdsc->max_sessions || !mdsc->sessions[mds]) |
2f2dc053 | 945 | return false; |
98cfda81 CX |
946 | else |
947 | return true; | |
2f2dc053 SW |
948 | } |
949 | ||
2600d2dd SW |
950 | static int __verify_registered_session(struct ceph_mds_client *mdsc, |
951 | struct ceph_mds_session *s) | |
952 | { | |
953 | if (s->s_mds >= mdsc->max_sessions || | |
954 | mdsc->sessions[s->s_mds] != s) | |
955 | return -ENOENT; | |
956 | return 0; | |
957 | } | |
958 | ||
2f2dc053 SW |
959 | /* |
960 | * create+register a new session for given mds. | |
961 | * called under mdsc->mutex. | |
962 | */ | |
963 | static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc, | |
964 | int mds) | |
965 | { | |
38d46409 | 966 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
967 | struct ceph_mds_session *s; |
968 | ||
a68e564a XL |
969 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_FENCE_IO) |
970 | return ERR_PTR(-EIO); | |
971 | ||
b38c9eb4 | 972 | if (mds >= mdsc->mdsmap->possible_max_rank) |
c338c07c NY |
973 | return ERR_PTR(-EINVAL); |
974 | ||
2f2dc053 | 975 | s = kzalloc(sizeof(*s), GFP_NOFS); |
4736b009 DC |
976 | if (!s) |
977 | return ERR_PTR(-ENOMEM); | |
47474d0b CX |
978 | |
979 | if (mds >= mdsc->max_sessions) { | |
980 | int newmax = 1 << get_count_order(mds + 1); | |
981 | struct ceph_mds_session **sa; | |
982 | ||
38d46409 | 983 | doutc(cl, "realloc to %d\n", newmax); |
47474d0b CX |
984 | sa = kcalloc(newmax, sizeof(void *), GFP_NOFS); |
985 | if (!sa) | |
986 | goto fail_realloc; | |
987 | if (mdsc->sessions) { | |
988 | memcpy(sa, mdsc->sessions, | |
989 | mdsc->max_sessions * sizeof(void *)); | |
990 | kfree(mdsc->sessions); | |
991 | } | |
992 | mdsc->sessions = sa; | |
993 | mdsc->max_sessions = newmax; | |
994 | } | |
995 | ||
38d46409 | 996 | doutc(cl, "mds%d\n", mds); |
2f2dc053 SW |
997 | s->s_mdsc = mdsc; |
998 | s->s_mds = mds; | |
999 | s->s_state = CEPH_MDS_SESSION_NEW; | |
2f2dc053 SW |
1000 | mutex_init(&s->s_mutex); |
1001 | ||
b7a9e5dd | 1002 | ceph_con_init(&s->s_con, s, &mds_con_ops, &mdsc->fsc->client->msgr); |
2f2dc053 | 1003 | |
52d60f8e | 1004 | atomic_set(&s->s_cap_gen, 1); |
1ce208a6 | 1005 | s->s_cap_ttl = jiffies - 1; |
d8fb02ab AE |
1006 | |
1007 | spin_lock_init(&s->s_cap_lock); | |
2f2dc053 | 1008 | INIT_LIST_HEAD(&s->s_caps); |
3997c01d | 1009 | refcount_set(&s->s_ref, 1); |
2f2dc053 SW |
1010 | INIT_LIST_HEAD(&s->s_waiting); |
1011 | INIT_LIST_HEAD(&s->s_unsafe); | |
d4846487 | 1012 | xa_init(&s->s_delegated_inos); |
2f2dc053 | 1013 | INIT_LIST_HEAD(&s->s_cap_releases); |
e3ec8d68 YZ |
1014 | INIT_WORK(&s->s_cap_release_work, ceph_cap_release_work); |
1015 | ||
1cf03a68 | 1016 | INIT_LIST_HEAD(&s->s_cap_dirty); |
2f2dc053 | 1017 | INIT_LIST_HEAD(&s->s_cap_flushing); |
2f2dc053 | 1018 | |
2f2dc053 | 1019 | mdsc->sessions[mds] = s; |
86d8f67b | 1020 | atomic_inc(&mdsc->num_sessions); |
3997c01d | 1021 | refcount_inc(&s->s_ref); /* one ref to sessions[], one to caller */ |
42ce56e5 | 1022 | |
b7a9e5dd SW |
1023 | ceph_con_open(&s->s_con, CEPH_ENTITY_TYPE_MDS, mds, |
1024 | ceph_mdsmap_get_addr(mdsc->mdsmap, mds)); | |
42ce56e5 | 1025 | |
2f2dc053 | 1026 | return s; |
42ce56e5 SW |
1027 | |
1028 | fail_realloc: | |
1029 | kfree(s); | |
1030 | return ERR_PTR(-ENOMEM); | |
2f2dc053 SW |
1031 | } |
1032 | ||
1033 | /* | |
1034 | * called under mdsc->mutex | |
1035 | */ | |
2600d2dd | 1036 | static void __unregister_session(struct ceph_mds_client *mdsc, |
42ce56e5 | 1037 | struct ceph_mds_session *s) |
2f2dc053 | 1038 | { |
38d46409 | 1039 | doutc(mdsc->fsc->client, "mds%d %p\n", s->s_mds, s); |
2600d2dd | 1040 | BUG_ON(mdsc->sessions[s->s_mds] != s); |
42ce56e5 SW |
1041 | mdsc->sessions[s->s_mds] = NULL; |
1042 | ceph_con_close(&s->s_con); | |
1043 | ceph_put_mds_session(s); | |
86d8f67b | 1044 | atomic_dec(&mdsc->num_sessions); |
2f2dc053 SW |
1045 | } |
1046 | ||
1047 | /* | |
1048 | * drop session refs in request. | |
1049 | * | |
1050 | * should be last request ref, or hold mdsc->mutex | |
1051 | */ | |
1052 | static void put_request_session(struct ceph_mds_request *req) | |
1053 | { | |
1054 | if (req->r_session) { | |
1055 | ceph_put_mds_session(req->r_session); | |
1056 | req->r_session = NULL; | |
1057 | } | |
1058 | } | |
1059 | ||
59b312f3 XL |
1060 | void ceph_mdsc_iterate_sessions(struct ceph_mds_client *mdsc, |
1061 | void (*cb)(struct ceph_mds_session *), | |
1062 | bool check_state) | |
1063 | { | |
1064 | int mds; | |
1065 | ||
1066 | mutex_lock(&mdsc->mutex); | |
1067 | for (mds = 0; mds < mdsc->max_sessions; ++mds) { | |
1068 | struct ceph_mds_session *s; | |
1069 | ||
1070 | s = __ceph_lookup_mds_session(mdsc, mds); | |
1071 | if (!s) | |
1072 | continue; | |
1073 | ||
1074 | if (check_state && !check_session_state(s)) { | |
1075 | ceph_put_mds_session(s); | |
1076 | continue; | |
1077 | } | |
1078 | ||
1079 | mutex_unlock(&mdsc->mutex); | |
1080 | cb(s); | |
1081 | ceph_put_mds_session(s); | |
1082 | mutex_lock(&mdsc->mutex); | |
1083 | } | |
1084 | mutex_unlock(&mdsc->mutex); | |
1085 | } | |
1086 | ||
153c8e6b | 1087 | void ceph_mdsc_release_request(struct kref *kref) |
2f2dc053 | 1088 | { |
153c8e6b SW |
1089 | struct ceph_mds_request *req = container_of(kref, |
1090 | struct ceph_mds_request, | |
1091 | r_kref); | |
07045648 | 1092 | ceph_mdsc_release_dir_caps_async(req); |
54008399 | 1093 | destroy_reply_info(&req->r_reply_info); |
153c8e6b SW |
1094 | if (req->r_request) |
1095 | ceph_msg_put(req->r_request); | |
54008399 | 1096 | if (req->r_reply) |
153c8e6b | 1097 | ceph_msg_put(req->r_reply); |
153c8e6b | 1098 | if (req->r_inode) { |
41b02e1f | 1099 | ceph_put_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN); |
23c2c76e | 1100 | iput(req->r_inode); |
153c8e6b | 1101 | } |
9c1c2b35 | 1102 | if (req->r_parent) { |
3dd69aab | 1103 | ceph_put_cap_refs(ceph_inode(req->r_parent), CEPH_CAP_PIN); |
23c2c76e | 1104 | iput(req->r_parent); |
9c1c2b35 | 1105 | } |
23c2c76e | 1106 | iput(req->r_target_inode); |
ec9595c0 | 1107 | iput(req->r_new_inode); |
153c8e6b SW |
1108 | if (req->r_dentry) |
1109 | dput(req->r_dentry); | |
844d87c3 SW |
1110 | if (req->r_old_dentry) |
1111 | dput(req->r_old_dentry); | |
1112 | if (req->r_old_dentry_dir) { | |
41b02e1f SW |
1113 | /* |
1114 | * track (and drop pins for) r_old_dentry_dir | |
1115 | * separately, since r_old_dentry's d_parent may have | |
1116 | * changed between the dir mutex being dropped and | |
1117 | * this request being freed. | |
1118 | */ | |
1119 | ceph_put_cap_refs(ceph_inode(req->r_old_dentry_dir), | |
1120 | CEPH_CAP_PIN); | |
23c2c76e | 1121 | iput(req->r_old_dentry_dir); |
2f2dc053 | 1122 | } |
153c8e6b SW |
1123 | kfree(req->r_path1); |
1124 | kfree(req->r_path2); | |
7fe0cdeb | 1125 | put_cred(req->r_cred); |
9c2df227 CB |
1126 | if (req->r_mnt_idmap) |
1127 | mnt_idmap_put(req->r_mnt_idmap); | |
25e6bae3 YZ |
1128 | if (req->r_pagelist) |
1129 | ceph_pagelist_release(req->r_pagelist); | |
2d332d5b | 1130 | kfree(req->r_fscrypt_auth); |
24865e75 | 1131 | kfree(req->r_altname); |
153c8e6b | 1132 | put_request_session(req); |
37151668 | 1133 | ceph_unreserve_caps(req->r_mdsc, &req->r_caps_reservation); |
428138c9 | 1134 | WARN_ON_ONCE(!list_empty(&req->r_wait)); |
058daab7 | 1135 | kmem_cache_free(ceph_mds_request_cachep, req); |
2f2dc053 SW |
1136 | } |
1137 | ||
fcd00b68 ID |
1138 | DEFINE_RB_FUNCS(request, struct ceph_mds_request, r_tid, r_node) |
1139 | ||
2f2dc053 SW |
1140 | /* |
1141 | * lookup session, bump ref if found. | |
1142 | * | |
1143 | * called under mdsc->mutex. | |
1144 | */ | |
fcd00b68 ID |
1145 | static struct ceph_mds_request * |
1146 | lookup_get_request(struct ceph_mds_client *mdsc, u64 tid) | |
2f2dc053 SW |
1147 | { |
1148 | struct ceph_mds_request *req; | |
44ca18f2 | 1149 | |
fcd00b68 ID |
1150 | req = lookup_request(&mdsc->request_tree, tid); |
1151 | if (req) | |
1152 | ceph_mdsc_get_request(req); | |
44ca18f2 | 1153 | |
fcd00b68 | 1154 | return req; |
2f2dc053 SW |
1155 | } |
1156 | ||
1157 | /* | |
1158 | * Register an in-flight request, and assign a tid. Link to directory | |
1159 | * are modifying (if any). | |
1160 | * | |
1161 | * Called under mdsc->mutex. | |
1162 | */ | |
1163 | static void __register_request(struct ceph_mds_client *mdsc, | |
1164 | struct ceph_mds_request *req, | |
1165 | struct inode *dir) | |
1166 | { | |
38d46409 | 1167 | struct ceph_client *cl = mdsc->fsc->client; |
e30ee581 ZZ |
1168 | int ret = 0; |
1169 | ||
2f2dc053 | 1170 | req->r_tid = ++mdsc->last_tid; |
e30ee581 ZZ |
1171 | if (req->r_num_caps) { |
1172 | ret = ceph_reserve_caps(mdsc, &req->r_caps_reservation, | |
1173 | req->r_num_caps); | |
1174 | if (ret < 0) { | |
38d46409 XL |
1175 | pr_err_client(cl, "%p failed to reserve caps: %d\n", |
1176 | req, ret); | |
e30ee581 ZZ |
1177 | /* set req->r_err to fail early from __do_request */ |
1178 | req->r_err = ret; | |
1179 | return; | |
1180 | } | |
1181 | } | |
38d46409 | 1182 | doutc(cl, "%p tid %lld\n", req, req->r_tid); |
2f2dc053 | 1183 | ceph_mdsc_get_request(req); |
fcd00b68 | 1184 | insert_request(&mdsc->request_tree, req); |
2f2dc053 | 1185 | |
7fe0cdeb | 1186 | req->r_cred = get_current_cred(); |
9c2df227 CB |
1187 | if (!req->r_mnt_idmap) |
1188 | req->r_mnt_idmap = &nop_mnt_idmap; | |
cb4276cc | 1189 | |
e8a7b8b1 YZ |
1190 | if (mdsc->oldest_tid == 0 && req->r_op != CEPH_MDS_OP_SETFILELOCK) |
1191 | mdsc->oldest_tid = req->r_tid; | |
1192 | ||
2f2dc053 | 1193 | if (dir) { |
3db0a2fc JL |
1194 | struct ceph_inode_info *ci = ceph_inode(dir); |
1195 | ||
3b663780 | 1196 | ihold(dir); |
2f2dc053 | 1197 | req->r_unsafe_dir = dir; |
3db0a2fc JL |
1198 | spin_lock(&ci->i_unsafe_lock); |
1199 | list_add_tail(&req->r_unsafe_dir_item, &ci->i_unsafe_dirops); | |
1200 | spin_unlock(&ci->i_unsafe_lock); | |
2f2dc053 SW |
1201 | } |
1202 | } | |
1203 | ||
1204 | static void __unregister_request(struct ceph_mds_client *mdsc, | |
1205 | struct ceph_mds_request *req) | |
1206 | { | |
38d46409 | 1207 | doutc(mdsc->fsc->client, "%p tid %lld\n", req, req->r_tid); |
e8a7b8b1 | 1208 | |
df963ea8 JL |
1209 | /* Never leave an unregistered request on an unsafe list! */ |
1210 | list_del_init(&req->r_unsafe_item); | |
1211 | ||
e8a7b8b1 YZ |
1212 | if (req->r_tid == mdsc->oldest_tid) { |
1213 | struct rb_node *p = rb_next(&req->r_node); | |
1214 | mdsc->oldest_tid = 0; | |
1215 | while (p) { | |
1216 | struct ceph_mds_request *next_req = | |
1217 | rb_entry(p, struct ceph_mds_request, r_node); | |
1218 | if (next_req->r_op != CEPH_MDS_OP_SETFILELOCK) { | |
1219 | mdsc->oldest_tid = next_req->r_tid; | |
1220 | break; | |
1221 | } | |
1222 | p = rb_next(p); | |
1223 | } | |
1224 | } | |
1225 | ||
fcd00b68 | 1226 | erase_request(&mdsc->request_tree, req); |
2f2dc053 | 1227 | |
3db0a2fc | 1228 | if (req->r_unsafe_dir) { |
2f2dc053 | 1229 | struct ceph_inode_info *ci = ceph_inode(req->r_unsafe_dir); |
2f2dc053 SW |
1230 | spin_lock(&ci->i_unsafe_lock); |
1231 | list_del_init(&req->r_unsafe_dir_item); | |
1232 | spin_unlock(&ci->i_unsafe_lock); | |
4c06ace8 | 1233 | } |
bc2de10d JL |
1234 | if (req->r_target_inode && |
1235 | test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { | |
68cd5b4b YZ |
1236 | struct ceph_inode_info *ci = ceph_inode(req->r_target_inode); |
1237 | spin_lock(&ci->i_unsafe_lock); | |
1238 | list_del_init(&req->r_unsafe_target_item); | |
1239 | spin_unlock(&ci->i_unsafe_lock); | |
1240 | } | |
3b663780 | 1241 | |
4c06ace8 | 1242 | if (req->r_unsafe_dir) { |
23c2c76e | 1243 | iput(req->r_unsafe_dir); |
3b663780 | 1244 | req->r_unsafe_dir = NULL; |
2f2dc053 | 1245 | } |
94aa8ae1 | 1246 | |
fc55d2c9 YZ |
1247 | complete_all(&req->r_safe_completion); |
1248 | ||
94aa8ae1 | 1249 | ceph_mdsc_put_request(req); |
2f2dc053 SW |
1250 | } |
1251 | ||
30c71233 JL |
1252 | /* |
1253 | * Walk back up the dentry tree until we hit a dentry representing a | |
1254 | * non-snapshot inode. We do this using the rcu_read_lock (which must be held | |
1255 | * when calling this) to ensure that the objects won't disappear while we're | |
1256 | * working with them. Once we hit a candidate dentry, we attempt to take a | |
1257 | * reference to it, and return that as the result. | |
1258 | */ | |
f1075480 DC |
1259 | static struct inode *get_nonsnap_parent(struct dentry *dentry) |
1260 | { | |
1261 | struct inode *inode = NULL; | |
30c71233 JL |
1262 | |
1263 | while (dentry && !IS_ROOT(dentry)) { | |
1264 | inode = d_inode_rcu(dentry); | |
1265 | if (!inode || ceph_snap(inode) == CEPH_NOSNAP) | |
1266 | break; | |
1267 | dentry = dentry->d_parent; | |
1268 | } | |
1269 | if (inode) | |
1270 | inode = igrab(inode); | |
1271 | return inode; | |
1272 | } | |
1273 | ||
2f2dc053 SW |
1274 | /* |
1275 | * Choose mds to send request to next. If there is a hint set in the | |
1276 | * request (e.g., due to a prior forward hint from the mds), use that. | |
1277 | * Otherwise, consult frag tree and/or caps to identify the | |
1278 | * appropriate mds. If all else fails, choose randomly. | |
1279 | * | |
1280 | * Called under mdsc->mutex. | |
1281 | */ | |
1282 | static int __choose_mds(struct ceph_mds_client *mdsc, | |
c4853e97 XL |
1283 | struct ceph_mds_request *req, |
1284 | bool *random) | |
2f2dc053 SW |
1285 | { |
1286 | struct inode *inode; | |
1287 | struct ceph_inode_info *ci; | |
1288 | struct ceph_cap *cap; | |
1289 | int mode = req->r_direct_mode; | |
1290 | int mds = -1; | |
1291 | u32 hash = req->r_direct_hash; | |
bc2de10d | 1292 | bool is_hash = test_bit(CEPH_MDS_R_DIRECT_IS_HASH, &req->r_req_flags); |
38d46409 | 1293 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 | 1294 | |
c4853e97 XL |
1295 | if (random) |
1296 | *random = false; | |
1297 | ||
2f2dc053 SW |
1298 | /* |
1299 | * is there a specific mds we should try? ignore hint if we have | |
1300 | * no session and the mds is not up (active or recovering). | |
1301 | */ | |
1302 | if (req->r_resend_mds >= 0 && | |
1303 | (__have_session(mdsc, req->r_resend_mds) || | |
1304 | ceph_mdsmap_get_state(mdsc->mdsmap, req->r_resend_mds) > 0)) { | |
38d46409 | 1305 | doutc(cl, "using resend_mds mds%d\n", req->r_resend_mds); |
2f2dc053 SW |
1306 | return req->r_resend_mds; |
1307 | } | |
1308 | ||
1309 | if (mode == USE_RANDOM_MDS) | |
1310 | goto random; | |
1311 | ||
1312 | inode = NULL; | |
1313 | if (req->r_inode) { | |
5d37ca14 YZ |
1314 | if (ceph_snap(req->r_inode) != CEPH_SNAPDIR) { |
1315 | inode = req->r_inode; | |
1316 | ihold(inode); | |
1317 | } else { | |
38f340cc YZ |
1318 | /* req->r_dentry is non-null for LSSNAP request */ |
1319 | rcu_read_lock(); | |
1320 | inode = get_nonsnap_parent(req->r_dentry); | |
1321 | rcu_read_unlock(); | |
38d46409 XL |
1322 | doutc(cl, "using snapdir's parent %p %llx.%llx\n", |
1323 | inode, ceph_vinop(inode)); | |
5d37ca14 | 1324 | } |
38f340cc | 1325 | } else if (req->r_dentry) { |
d79698da | 1326 | /* ignore race with rename; old or new d_parent is okay */ |
30c71233 JL |
1327 | struct dentry *parent; |
1328 | struct inode *dir; | |
1329 | ||
1330 | rcu_read_lock(); | |
41883ba8 | 1331 | parent = READ_ONCE(req->r_dentry->d_parent); |
3dd69aab | 1332 | dir = req->r_parent ? : d_inode_rcu(parent); |
eb6bb1c5 | 1333 | |
30c71233 JL |
1334 | if (!dir || dir->i_sb != mdsc->fsc->sb) { |
1335 | /* not this fs or parent went negative */ | |
2b0143b5 | 1336 | inode = d_inode(req->r_dentry); |
30c71233 JL |
1337 | if (inode) |
1338 | ihold(inode); | |
eb6bb1c5 SW |
1339 | } else if (ceph_snap(dir) != CEPH_NOSNAP) { |
1340 | /* direct snapped/virtual snapdir requests | |
1341 | * based on parent dir inode */ | |
30c71233 | 1342 | inode = get_nonsnap_parent(parent); |
38d46409 XL |
1343 | doutc(cl, "using nonsnap parent %p %llx.%llx\n", |
1344 | inode, ceph_vinop(inode)); | |
ca18bede | 1345 | } else { |
eb6bb1c5 | 1346 | /* dentry target */ |
2b0143b5 | 1347 | inode = d_inode(req->r_dentry); |
ca18bede YZ |
1348 | if (!inode || mode == USE_AUTH_MDS) { |
1349 | /* dir + name */ | |
30c71233 | 1350 | inode = igrab(dir); |
ca18bede YZ |
1351 | hash = ceph_dentry_hash(dir, req->r_dentry); |
1352 | is_hash = true; | |
30c71233 JL |
1353 | } else { |
1354 | ihold(inode); | |
ca18bede | 1355 | } |
2f2dc053 | 1356 | } |
30c71233 | 1357 | rcu_read_unlock(); |
2f2dc053 | 1358 | } |
eb6bb1c5 | 1359 | |
2f2dc053 SW |
1360 | if (!inode) |
1361 | goto random; | |
38d46409 XL |
1362 | |
1363 | doutc(cl, "%p %llx.%llx is_hash=%d (0x%x) mode %d\n", inode, | |
1364 | ceph_vinop(inode), (int)is_hash, hash, mode); | |
2f2dc053 SW |
1365 | ci = ceph_inode(inode); |
1366 | ||
1367 | if (is_hash && S_ISDIR(inode->i_mode)) { | |
1368 | struct ceph_inode_frag frag; | |
1369 | int found; | |
1370 | ||
1371 | ceph_choose_frag(ci, hash, &frag, &found); | |
1372 | if (found) { | |
1373 | if (mode == USE_ANY_MDS && frag.ndist > 0) { | |
1374 | u8 r; | |
1375 | ||
1376 | /* choose a random replica */ | |
1377 | get_random_bytes(&r, 1); | |
1378 | r %= frag.ndist; | |
1379 | mds = frag.dist[r]; | |
38d46409 XL |
1380 | doutc(cl, "%p %llx.%llx frag %u mds%d (%d/%d)\n", |
1381 | inode, ceph_vinop(inode), frag.frag, | |
1382 | mds, (int)r, frag.ndist); | |
d66bbd44 | 1383 | if (ceph_mdsmap_get_state(mdsc->mdsmap, mds) >= |
5d47648f XL |
1384 | CEPH_MDS_STATE_ACTIVE && |
1385 | !ceph_mdsmap_is_laggy(mdsc->mdsmap, mds)) | |
30c71233 | 1386 | goto out; |
2f2dc053 SW |
1387 | } |
1388 | ||
1389 | /* since this file/dir wasn't known to be | |
1390 | * replicated, then we want to look for the | |
1391 | * authoritative mds. */ | |
2f2dc053 SW |
1392 | if (frag.mds >= 0) { |
1393 | /* choose auth mds */ | |
1394 | mds = frag.mds; | |
38d46409 XL |
1395 | doutc(cl, "%p %llx.%llx frag %u mds%d (auth)\n", |
1396 | inode, ceph_vinop(inode), frag.frag, mds); | |
d66bbd44 | 1397 | if (ceph_mdsmap_get_state(mdsc->mdsmap, mds) >= |
5d47648f | 1398 | CEPH_MDS_STATE_ACTIVE) { |
224c7b67 | 1399 | if (!ceph_mdsmap_is_laggy(mdsc->mdsmap, |
5d47648f XL |
1400 | mds)) |
1401 | goto out; | |
1402 | } | |
2f2dc053 | 1403 | } |
5d47648f | 1404 | mode = USE_AUTH_MDS; |
2f2dc053 SW |
1405 | } |
1406 | } | |
1407 | ||
be655596 | 1408 | spin_lock(&ci->i_ceph_lock); |
2f2dc053 SW |
1409 | cap = NULL; |
1410 | if (mode == USE_AUTH_MDS) | |
1411 | cap = ci->i_auth_cap; | |
1412 | if (!cap && !RB_EMPTY_ROOT(&ci->i_caps)) | |
1413 | cap = rb_entry(rb_first(&ci->i_caps), struct ceph_cap, ci_node); | |
1414 | if (!cap) { | |
be655596 | 1415 | spin_unlock(&ci->i_ceph_lock); |
23c2c76e | 1416 | iput(inode); |
2f2dc053 SW |
1417 | goto random; |
1418 | } | |
1419 | mds = cap->session->s_mds; | |
38d46409 XL |
1420 | doutc(cl, "%p %llx.%llx mds%d (%scap %p)\n", inode, |
1421 | ceph_vinop(inode), mds, | |
1422 | cap == ci->i_auth_cap ? "auth " : "", cap); | |
be655596 | 1423 | spin_unlock(&ci->i_ceph_lock); |
30c71233 | 1424 | out: |
23c2c76e | 1425 | iput(inode); |
2f2dc053 SW |
1426 | return mds; |
1427 | ||
1428 | random: | |
c4853e97 XL |
1429 | if (random) |
1430 | *random = true; | |
1431 | ||
2f2dc053 | 1432 | mds = ceph_mdsmap_get_random_mds(mdsc->mdsmap); |
38d46409 | 1433 | doutc(cl, "chose random mds%d\n", mds); |
2f2dc053 SW |
1434 | return mds; |
1435 | } | |
1436 | ||
1437 | ||
1438 | /* | |
1439 | * session messages | |
1440 | */ | |
fba97e80 | 1441 | struct ceph_msg *ceph_create_session_msg(u32 op, u64 seq) |
2f2dc053 SW |
1442 | { |
1443 | struct ceph_msg *msg; | |
1444 | struct ceph_mds_session_head *h; | |
1445 | ||
b61c2763 SW |
1446 | msg = ceph_msg_new(CEPH_MSG_CLIENT_SESSION, sizeof(*h), GFP_NOFS, |
1447 | false); | |
a79832f2 | 1448 | if (!msg) { |
fba97e80 XL |
1449 | pr_err("ENOMEM creating session %s msg\n", |
1450 | ceph_session_op_name(op)); | |
a79832f2 | 1451 | return NULL; |
2f2dc053 SW |
1452 | } |
1453 | h = msg->front.iov_base; | |
1454 | h->op = cpu_to_le32(op); | |
1455 | h->seq = cpu_to_le64(seq); | |
dbd0c8bf JS |
1456 | |
1457 | return msg; | |
1458 | } | |
1459 | ||
9ba1e224 XL |
1460 | static const unsigned char feature_bits[] = CEPHFS_FEATURES_CLIENT_SUPPORTED; |
1461 | #define FEATURE_BYTES(c) (DIV_ROUND_UP((size_t)feature_bits[c - 1] + 1, 64) * 8) | |
b682c6d4 | 1462 | static int encode_supported_features(void **p, void *end) |
342ce182 | 1463 | { |
9ba1e224 | 1464 | static const size_t count = ARRAY_SIZE(feature_bits); |
342ce182 YZ |
1465 | |
1466 | if (count > 0) { | |
1467 | size_t i; | |
9ba1e224 | 1468 | size_t size = FEATURE_BYTES(count); |
fea013e0 | 1469 | unsigned long bit; |
342ce182 | 1470 | |
b682c6d4 XL |
1471 | if (WARN_ON_ONCE(*p + 4 + size > end)) |
1472 | return -ERANGE; | |
1473 | ||
342ce182 YZ |
1474 | ceph_encode_32(p, size); |
1475 | memset(*p, 0, size); | |
fea013e0 LH |
1476 | for (i = 0; i < count; i++) { |
1477 | bit = feature_bits[i]; | |
1478 | ((unsigned char *)(*p))[bit / 8] |= BIT(bit % 8); | |
1479 | } | |
342ce182 YZ |
1480 | *p += size; |
1481 | } else { | |
b682c6d4 XL |
1482 | if (WARN_ON_ONCE(*p + 4 > end)) |
1483 | return -ERANGE; | |
1484 | ||
342ce182 YZ |
1485 | ceph_encode_32(p, 0); |
1486 | } | |
b682c6d4 XL |
1487 | |
1488 | return 0; | |
342ce182 YZ |
1489 | } |
1490 | ||
3b4168dd XL |
1491 | static const unsigned char metric_bits[] = CEPHFS_METRIC_SPEC_CLIENT_SUPPORTED; |
1492 | #define METRIC_BYTES(cnt) (DIV_ROUND_UP((size_t)metric_bits[cnt - 1] + 1, 64) * 8) | |
1493 | static int encode_metric_spec(void **p, void *end) | |
1494 | { | |
1495 | static const size_t count = ARRAY_SIZE(metric_bits); | |
1496 | ||
1497 | /* header */ | |
1498 | if (WARN_ON_ONCE(*p + 2 > end)) | |
1499 | return -ERANGE; | |
1500 | ||
1501 | ceph_encode_8(p, 1); /* version */ | |
1502 | ceph_encode_8(p, 1); /* compat */ | |
1503 | ||
1504 | if (count > 0) { | |
1505 | size_t i; | |
1506 | size_t size = METRIC_BYTES(count); | |
1507 | ||
1508 | if (WARN_ON_ONCE(*p + 4 + 4 + size > end)) | |
1509 | return -ERANGE; | |
1510 | ||
1511 | /* metric spec info length */ | |
1512 | ceph_encode_32(p, 4 + size); | |
1513 | ||
1514 | /* metric spec */ | |
1515 | ceph_encode_32(p, size); | |
1516 | memset(*p, 0, size); | |
1517 | for (i = 0; i < count; i++) | |
1518 | ((unsigned char *)(*p))[i / 8] |= BIT(metric_bits[i] % 8); | |
1519 | *p += size; | |
1520 | } else { | |
1521 | if (WARN_ON_ONCE(*p + 4 + 4 > end)) | |
1522 | return -ERANGE; | |
1523 | ||
1524 | /* metric spec info length */ | |
1525 | ceph_encode_32(p, 4); | |
1526 | /* metric spec */ | |
1527 | ceph_encode_32(p, 0); | |
1528 | } | |
1529 | ||
1530 | return 0; | |
1531 | } | |
1532 | ||
dbd0c8bf JS |
1533 | /* |
1534 | * session message, specialization for CEPH_SESSION_REQUEST_OPEN | |
1535 | * to include additional client metadata fields. | |
1536 | */ | |
66207de3 XL |
1537 | static struct ceph_msg * |
1538 | create_session_full_msg(struct ceph_mds_client *mdsc, int op, u64 seq) | |
dbd0c8bf JS |
1539 | { |
1540 | struct ceph_msg *msg; | |
1541 | struct ceph_mds_session_head *h; | |
4a756db2 | 1542 | int i; |
342ce182 | 1543 | int extra_bytes = 0; |
dbd0c8bf JS |
1544 | int metadata_key_count = 0; |
1545 | struct ceph_options *opt = mdsc->fsc->client->options; | |
3f384954 | 1546 | struct ceph_mount_options *fsopt = mdsc->fsc->mount_options; |
38d46409 | 1547 | struct ceph_client *cl = mdsc->fsc->client; |
9ba1e224 | 1548 | size_t size, count; |
342ce182 | 1549 | void *p, *end; |
b682c6d4 | 1550 | int ret; |
dbd0c8bf | 1551 | |
a6a5ce4f | 1552 | const char* metadata[][2] = { |
717e6f28 YZ |
1553 | {"hostname", mdsc->nodename}, |
1554 | {"kernel_version", init_utsname()->release}, | |
3f384954 YZ |
1555 | {"entity_id", opt->name ? : ""}, |
1556 | {"root", fsopt->server_path ? : "/"}, | |
dbd0c8bf JS |
1557 | {NULL, NULL} |
1558 | }; | |
1559 | ||
1560 | /* Calculate serialized length of metadata */ | |
342ce182 | 1561 | extra_bytes = 4; /* map length */ |
d37b1d99 | 1562 | for (i = 0; metadata[i][0]; ++i) { |
342ce182 | 1563 | extra_bytes += 8 + strlen(metadata[i][0]) + |
dbd0c8bf JS |
1564 | strlen(metadata[i][1]); |
1565 | metadata_key_count++; | |
1566 | } | |
9ba1e224 | 1567 | |
342ce182 | 1568 | /* supported feature */ |
9ba1e224 XL |
1569 | size = 0; |
1570 | count = ARRAY_SIZE(feature_bits); | |
1571 | if (count > 0) | |
1572 | size = FEATURE_BYTES(count); | |
1573 | extra_bytes += 4 + size; | |
dbd0c8bf | 1574 | |
3b4168dd XL |
1575 | /* metric spec */ |
1576 | size = 0; | |
1577 | count = ARRAY_SIZE(metric_bits); | |
1578 | if (count > 0) | |
1579 | size = METRIC_BYTES(count); | |
1580 | extra_bytes += 2 + 4 + 4 + size; | |
1581 | ||
6df89bf2 XL |
1582 | /* flags, mds auth caps and oldest_client_tid */ |
1583 | extra_bytes += 4 + 4 + 8; | |
1584 | ||
dbd0c8bf | 1585 | /* Allocate the message */ |
342ce182 | 1586 | msg = ceph_msg_new(CEPH_MSG_CLIENT_SESSION, sizeof(*h) + extra_bytes, |
dbd0c8bf JS |
1587 | GFP_NOFS, false); |
1588 | if (!msg) { | |
38d46409 | 1589 | pr_err_client(cl, "ENOMEM creating session open msg\n"); |
b682c6d4 | 1590 | return ERR_PTR(-ENOMEM); |
dbd0c8bf | 1591 | } |
342ce182 YZ |
1592 | p = msg->front.iov_base; |
1593 | end = p + msg->front.iov_len; | |
1594 | ||
1595 | h = p; | |
66207de3 | 1596 | h->op = cpu_to_le32(op); |
dbd0c8bf JS |
1597 | h->seq = cpu_to_le64(seq); |
1598 | ||
1599 | /* | |
1600 | * Serialize client metadata into waiting buffer space, using | |
1601 | * the format that userspace expects for map<string, string> | |
7cfa0313 | 1602 | * |
6df89bf2 | 1603 | * ClientSession messages with metadata are v7 |
dbd0c8bf | 1604 | */ |
6df89bf2 | 1605 | msg->hdr.version = cpu_to_le16(7); |
7cfa0313 | 1606 | msg->hdr.compat_version = cpu_to_le16(1); |
dbd0c8bf JS |
1607 | |
1608 | /* The write pointer, following the session_head structure */ | |
342ce182 | 1609 | p += sizeof(*h); |
dbd0c8bf JS |
1610 | |
1611 | /* Number of entries in the map */ | |
1612 | ceph_encode_32(&p, metadata_key_count); | |
1613 | ||
1614 | /* Two length-prefixed strings for each entry in the map */ | |
d37b1d99 | 1615 | for (i = 0; metadata[i][0]; ++i) { |
dbd0c8bf JS |
1616 | size_t const key_len = strlen(metadata[i][0]); |
1617 | size_t const val_len = strlen(metadata[i][1]); | |
1618 | ||
1619 | ceph_encode_32(&p, key_len); | |
1620 | memcpy(p, metadata[i][0], key_len); | |
1621 | p += key_len; | |
1622 | ceph_encode_32(&p, val_len); | |
1623 | memcpy(p, metadata[i][1], val_len); | |
1624 | p += val_len; | |
1625 | } | |
1626 | ||
b682c6d4 XL |
1627 | ret = encode_supported_features(&p, end); |
1628 | if (ret) { | |
38d46409 | 1629 | pr_err_client(cl, "encode_supported_features failed!\n"); |
b682c6d4 XL |
1630 | ceph_msg_put(msg); |
1631 | return ERR_PTR(ret); | |
1632 | } | |
1633 | ||
3b4168dd XL |
1634 | ret = encode_metric_spec(&p, end); |
1635 | if (ret) { | |
38d46409 | 1636 | pr_err_client(cl, "encode_metric_spec failed!\n"); |
3b4168dd XL |
1637 | ceph_msg_put(msg); |
1638 | return ERR_PTR(ret); | |
1639 | } | |
1640 | ||
6df89bf2 XL |
1641 | /* version == 5, flags */ |
1642 | ceph_encode_32(&p, 0); | |
1643 | ||
1644 | /* version == 6, mds auth caps */ | |
1645 | ceph_encode_32(&p, 0); | |
1646 | ||
1647 | /* version == 7, oldest_client_tid */ | |
1648 | ceph_encode_64(&p, mdsc->oldest_tid); | |
1649 | ||
342ce182 YZ |
1650 | msg->front.iov_len = p - msg->front.iov_base; |
1651 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
1652 | ||
2f2dc053 SW |
1653 | return msg; |
1654 | } | |
1655 | ||
1656 | /* | |
1657 | * send session open request. | |
1658 | * | |
1659 | * called under mdsc->mutex | |
1660 | */ | |
1661 | static int __open_session(struct ceph_mds_client *mdsc, | |
1662 | struct ceph_mds_session *session) | |
1663 | { | |
1664 | struct ceph_msg *msg; | |
1665 | int mstate; | |
1666 | int mds = session->s_mds; | |
2f2dc053 | 1667 | |
a68e564a XL |
1668 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_FENCE_IO) |
1669 | return -EIO; | |
1670 | ||
2f2dc053 SW |
1671 | /* wait for mds to go active? */ |
1672 | mstate = ceph_mdsmap_get_state(mdsc->mdsmap, mds); | |
38d46409 XL |
1673 | doutc(mdsc->fsc->client, "open_session to mds%d (%s)\n", mds, |
1674 | ceph_mds_state_name(mstate)); | |
2f2dc053 SW |
1675 | session->s_state = CEPH_MDS_SESSION_OPENING; |
1676 | session->s_renew_requested = jiffies; | |
1677 | ||
1678 | /* send connect message */ | |
66207de3 XL |
1679 | msg = create_session_full_msg(mdsc, CEPH_SESSION_REQUEST_OPEN, |
1680 | session->s_seq); | |
b682c6d4 XL |
1681 | if (IS_ERR(msg)) |
1682 | return PTR_ERR(msg); | |
2f2dc053 | 1683 | ceph_con_send(&session->s_con, msg); |
2f2dc053 SW |
1684 | return 0; |
1685 | } | |
1686 | ||
ed0552a1 SW |
1687 | /* |
1688 | * open sessions for any export targets for the given mds | |
1689 | * | |
1690 | * called under mdsc->mutex | |
1691 | */ | |
5d72d13c YZ |
1692 | static struct ceph_mds_session * |
1693 | __open_export_target_session(struct ceph_mds_client *mdsc, int target) | |
1694 | { | |
1695 | struct ceph_mds_session *session; | |
b682c6d4 | 1696 | int ret; |
5d72d13c YZ |
1697 | |
1698 | session = __ceph_lookup_mds_session(mdsc, target); | |
1699 | if (!session) { | |
1700 | session = register_session(mdsc, target); | |
1701 | if (IS_ERR(session)) | |
1702 | return session; | |
1703 | } | |
1704 | if (session->s_state == CEPH_MDS_SESSION_NEW || | |
b682c6d4 XL |
1705 | session->s_state == CEPH_MDS_SESSION_CLOSING) { |
1706 | ret = __open_session(mdsc, session); | |
1707 | if (ret) | |
1708 | return ERR_PTR(ret); | |
1709 | } | |
5d72d13c YZ |
1710 | |
1711 | return session; | |
1712 | } | |
1713 | ||
1714 | struct ceph_mds_session * | |
1715 | ceph_mdsc_open_export_target_session(struct ceph_mds_client *mdsc, int target) | |
1716 | { | |
1717 | struct ceph_mds_session *session; | |
38d46409 | 1718 | struct ceph_client *cl = mdsc->fsc->client; |
5d72d13c | 1719 | |
38d46409 | 1720 | doutc(cl, "to mds%d\n", target); |
5d72d13c YZ |
1721 | |
1722 | mutex_lock(&mdsc->mutex); | |
1723 | session = __open_export_target_session(mdsc, target); | |
1724 | mutex_unlock(&mdsc->mutex); | |
1725 | ||
1726 | return session; | |
1727 | } | |
1728 | ||
ed0552a1 SW |
1729 | static void __open_export_target_sessions(struct ceph_mds_client *mdsc, |
1730 | struct ceph_mds_session *session) | |
1731 | { | |
1732 | struct ceph_mds_info *mi; | |
1733 | struct ceph_mds_session *ts; | |
1734 | int i, mds = session->s_mds; | |
38d46409 | 1735 | struct ceph_client *cl = mdsc->fsc->client; |
ed0552a1 | 1736 | |
b38c9eb4 | 1737 | if (mds >= mdsc->mdsmap->possible_max_rank) |
ed0552a1 | 1738 | return; |
5d72d13c | 1739 | |
ed0552a1 | 1740 | mi = &mdsc->mdsmap->m_info[mds]; |
38d46409 XL |
1741 | doutc(cl, "for mds%d (%d targets)\n", session->s_mds, |
1742 | mi->num_export_targets); | |
ed0552a1 SW |
1743 | |
1744 | for (i = 0; i < mi->num_export_targets; i++) { | |
5d72d13c | 1745 | ts = __open_export_target_session(mdsc, mi->export_targets[i]); |
7e65624d | 1746 | ceph_put_mds_session(ts); |
ed0552a1 SW |
1747 | } |
1748 | } | |
1749 | ||
154f42c2 SW |
1750 | void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client *mdsc, |
1751 | struct ceph_mds_session *session) | |
1752 | { | |
1753 | mutex_lock(&mdsc->mutex); | |
1754 | __open_export_target_sessions(mdsc, session); | |
1755 | mutex_unlock(&mdsc->mutex); | |
1756 | } | |
1757 | ||
2f2dc053 SW |
1758 | /* |
1759 | * session caps | |
1760 | */ | |
1761 | ||
c8a96a31 JL |
1762 | static void detach_cap_releases(struct ceph_mds_session *session, |
1763 | struct list_head *target) | |
2f2dc053 | 1764 | { |
38d46409 XL |
1765 | struct ceph_client *cl = session->s_mdsc->fsc->client; |
1766 | ||
c8a96a31 JL |
1767 | lockdep_assert_held(&session->s_cap_lock); |
1768 | ||
1769 | list_splice_init(&session->s_cap_releases, target); | |
745a8e3b | 1770 | session->s_num_cap_releases = 0; |
38d46409 | 1771 | doutc(cl, "mds%d\n", session->s_mds); |
c8a96a31 | 1772 | } |
2f2dc053 | 1773 | |
c8a96a31 JL |
1774 | static void dispose_cap_releases(struct ceph_mds_client *mdsc, |
1775 | struct list_head *dispose) | |
1776 | { | |
1777 | while (!list_empty(dispose)) { | |
745a8e3b YZ |
1778 | struct ceph_cap *cap; |
1779 | /* zero out the in-progress message */ | |
c8a96a31 | 1780 | cap = list_first_entry(dispose, struct ceph_cap, session_caps); |
745a8e3b YZ |
1781 | list_del(&cap->session_caps); |
1782 | ceph_put_cap(mdsc, cap); | |
2f2dc053 | 1783 | } |
2f2dc053 SW |
1784 | } |
1785 | ||
1c841a96 YZ |
1786 | static void cleanup_session_requests(struct ceph_mds_client *mdsc, |
1787 | struct ceph_mds_session *session) | |
1788 | { | |
38d46409 | 1789 | struct ceph_client *cl = mdsc->fsc->client; |
1c841a96 YZ |
1790 | struct ceph_mds_request *req; |
1791 | struct rb_node *p; | |
1792 | ||
38d46409 | 1793 | doutc(cl, "mds%d\n", session->s_mds); |
1c841a96 YZ |
1794 | mutex_lock(&mdsc->mutex); |
1795 | while (!list_empty(&session->s_unsafe)) { | |
1796 | req = list_first_entry(&session->s_unsafe, | |
1797 | struct ceph_mds_request, r_unsafe_item); | |
38d46409 XL |
1798 | pr_warn_ratelimited_client(cl, " dropping unsafe request %llu\n", |
1799 | req->r_tid); | |
1bd85aa6 JL |
1800 | if (req->r_target_inode) |
1801 | mapping_set_error(req->r_target_inode->i_mapping, -EIO); | |
1802 | if (req->r_unsafe_dir) | |
1803 | mapping_set_error(req->r_unsafe_dir->i_mapping, -EIO); | |
1c841a96 YZ |
1804 | __unregister_request(mdsc, req); |
1805 | } | |
1806 | /* zero r_attempts, so kick_requests() will re-send requests */ | |
1807 | p = rb_first(&mdsc->request_tree); | |
1808 | while (p) { | |
1809 | req = rb_entry(p, struct ceph_mds_request, r_node); | |
1810 | p = rb_next(p); | |
1811 | if (req->r_session && | |
1812 | req->r_session->s_mds == session->s_mds) | |
1813 | req->r_attempts = 0; | |
1814 | } | |
1815 | mutex_unlock(&mdsc->mutex); | |
1816 | } | |
1817 | ||
2f2dc053 | 1818 | /* |
f818a736 SW |
1819 | * Helper to safely iterate over all caps associated with a session, with |
1820 | * special care taken to handle a racing __ceph_remove_cap(). | |
2f2dc053 | 1821 | * |
f818a736 | 1822 | * Caller must hold session s_mutex. |
2f2dc053 | 1823 | */ |
f5d77269 | 1824 | int ceph_iterate_session_caps(struct ceph_mds_session *session, |
aaf67de7 XL |
1825 | int (*cb)(struct inode *, int mds, void *), |
1826 | void *arg) | |
2f2dc053 | 1827 | { |
38d46409 | 1828 | struct ceph_client *cl = session->s_mdsc->fsc->client; |
7c1332b8 SW |
1829 | struct list_head *p; |
1830 | struct ceph_cap *cap; | |
1831 | struct inode *inode, *last_inode = NULL; | |
1832 | struct ceph_cap *old_cap = NULL; | |
2f2dc053 SW |
1833 | int ret; |
1834 | ||
38d46409 | 1835 | doutc(cl, "%p mds%d\n", session, session->s_mds); |
2f2dc053 | 1836 | spin_lock(&session->s_cap_lock); |
7c1332b8 SW |
1837 | p = session->s_caps.next; |
1838 | while (p != &session->s_caps) { | |
aaf67de7 XL |
1839 | int mds; |
1840 | ||
7c1332b8 | 1841 | cap = list_entry(p, struct ceph_cap, session_caps); |
874c8ca1 | 1842 | inode = igrab(&cap->ci->netfs.inode); |
7c1332b8 SW |
1843 | if (!inode) { |
1844 | p = p->next; | |
2f2dc053 | 1845 | continue; |
7c1332b8 SW |
1846 | } |
1847 | session->s_cap_iterator = cap; | |
aaf67de7 | 1848 | mds = cap->mds; |
2f2dc053 | 1849 | spin_unlock(&session->s_cap_lock); |
7c1332b8 SW |
1850 | |
1851 | if (last_inode) { | |
23c2c76e | 1852 | iput(last_inode); |
7c1332b8 SW |
1853 | last_inode = NULL; |
1854 | } | |
1855 | if (old_cap) { | |
37151668 | 1856 | ceph_put_cap(session->s_mdsc, old_cap); |
7c1332b8 SW |
1857 | old_cap = NULL; |
1858 | } | |
1859 | ||
aaf67de7 | 1860 | ret = cb(inode, mds, arg); |
7c1332b8 SW |
1861 | last_inode = inode; |
1862 | ||
2f2dc053 | 1863 | spin_lock(&session->s_cap_lock); |
7c1332b8 | 1864 | p = p->next; |
d37b1d99 | 1865 | if (!cap->ci) { |
38d46409 | 1866 | doutc(cl, "finishing cap %p removal\n", cap); |
7c1332b8 | 1867 | BUG_ON(cap->session != session); |
745a8e3b | 1868 | cap->session = NULL; |
7c1332b8 SW |
1869 | list_del_init(&cap->session_caps); |
1870 | session->s_nr_caps--; | |
4f1d756d | 1871 | atomic64_dec(&session->s_mdsc->metric.total_caps); |
e3ec8d68 YZ |
1872 | if (cap->queue_release) |
1873 | __ceph_queue_cap_release(session, cap); | |
1874 | else | |
745a8e3b | 1875 | old_cap = cap; /* put_cap it w/o locks held */ |
7c1332b8 | 1876 | } |
5dacf091 SW |
1877 | if (ret < 0) |
1878 | goto out; | |
2f2dc053 | 1879 | } |
5dacf091 SW |
1880 | ret = 0; |
1881 | out: | |
7c1332b8 | 1882 | session->s_cap_iterator = NULL; |
2f2dc053 | 1883 | spin_unlock(&session->s_cap_lock); |
7c1332b8 | 1884 | |
23c2c76e | 1885 | iput(last_inode); |
7c1332b8 | 1886 | if (old_cap) |
37151668 | 1887 | ceph_put_cap(session->s_mdsc, old_cap); |
7c1332b8 | 1888 | |
5dacf091 | 1889 | return ret; |
2f2dc053 SW |
1890 | } |
1891 | ||
aaf67de7 | 1892 | static int remove_session_caps_cb(struct inode *inode, int mds, void *arg) |
2f2dc053 SW |
1893 | { |
1894 | struct ceph_inode_info *ci = ceph_inode(inode); | |
38d46409 | 1895 | struct ceph_client *cl = ceph_inode_to_client(inode); |
6c93df5d | 1896 | bool invalidate = false; |
aaf67de7 XL |
1897 | struct ceph_cap *cap; |
1898 | int iputs = 0; | |
6c99f254 | 1899 | |
be655596 | 1900 | spin_lock(&ci->i_ceph_lock); |
aaf67de7 XL |
1901 | cap = __get_cap_for_mds(ci, mds); |
1902 | if (cap) { | |
38d46409 XL |
1903 | doutc(cl, " removing cap %p, ci is %p, inode is %p\n", |
1904 | cap, ci, &ci->netfs.inode); | |
aaf67de7 XL |
1905 | |
1906 | iputs = ceph_purge_inode_cap(inode, cap, &invalidate); | |
1907 | } | |
be655596 | 1908 | spin_unlock(&ci->i_ceph_lock); |
77310320 | 1909 | |
aaf67de7 XL |
1910 | if (cap) |
1911 | wake_up_all(&ci->i_cap_wq); | |
6c93df5d YZ |
1912 | if (invalidate) |
1913 | ceph_queue_invalidate(inode); | |
36e6da98 | 1914 | while (iputs--) |
a6d37ccd | 1915 | iput(inode); |
2f2dc053 SW |
1916 | return 0; |
1917 | } | |
1918 | ||
1919 | /* | |
1920 | * caller must hold session s_mutex | |
1921 | */ | |
1922 | static void remove_session_caps(struct ceph_mds_session *session) | |
1923 | { | |
6c93df5d YZ |
1924 | struct ceph_fs_client *fsc = session->s_mdsc->fsc; |
1925 | struct super_block *sb = fsc->sb; | |
c8a96a31 JL |
1926 | LIST_HEAD(dispose); |
1927 | ||
38d46409 | 1928 | doutc(fsc->client, "on %p\n", session); |
f5d77269 | 1929 | ceph_iterate_session_caps(session, remove_session_caps_cb, fsc); |
6f60f889 | 1930 | |
c8799fc4 YZ |
1931 | wake_up_all(&fsc->mdsc->cap_flushing_wq); |
1932 | ||
6f60f889 YZ |
1933 | spin_lock(&session->s_cap_lock); |
1934 | if (session->s_nr_caps > 0) { | |
6f60f889 YZ |
1935 | struct inode *inode; |
1936 | struct ceph_cap *cap, *prev = NULL; | |
1937 | struct ceph_vino vino; | |
1938 | /* | |
1939 | * iterate_session_caps() skips inodes that are being | |
1940 | * deleted, we need to wait until deletions are complete. | |
1941 | * __wait_on_freeing_inode() is designed for the job, | |
1942 | * but it is not exported, so use lookup inode function | |
1943 | * to access it. | |
1944 | */ | |
1945 | while (!list_empty(&session->s_caps)) { | |
1946 | cap = list_entry(session->s_caps.next, | |
1947 | struct ceph_cap, session_caps); | |
1948 | if (cap == prev) | |
1949 | break; | |
1950 | prev = cap; | |
1951 | vino = cap->ci->i_vino; | |
1952 | spin_unlock(&session->s_cap_lock); | |
1953 | ||
ed284c49 | 1954 | inode = ceph_find_inode(sb, vino); |
23c2c76e | 1955 | iput(inode); |
6f60f889 YZ |
1956 | |
1957 | spin_lock(&session->s_cap_lock); | |
1958 | } | |
1959 | } | |
745a8e3b YZ |
1960 | |
1961 | // drop cap expires and unlock s_cap_lock | |
c8a96a31 | 1962 | detach_cap_releases(session, &dispose); |
6f60f889 | 1963 | |
2f2dc053 | 1964 | BUG_ON(session->s_nr_caps > 0); |
6c99f254 | 1965 | BUG_ON(!list_empty(&session->s_cap_flushing)); |
c8a96a31 JL |
1966 | spin_unlock(&session->s_cap_lock); |
1967 | dispose_cap_releases(session->s_mdsc, &dispose); | |
2f2dc053 SW |
1968 | } |
1969 | ||
d2f8bb27 YZ |
1970 | enum { |
1971 | RECONNECT, | |
1972 | RENEWCAPS, | |
1973 | FORCE_RO, | |
1974 | }; | |
1975 | ||
2f2dc053 SW |
1976 | /* |
1977 | * wake up any threads waiting on this session's caps. if the cap is | |
1978 | * old (didn't get renewed on the client reconnect), remove it now. | |
1979 | * | |
1980 | * caller must hold s_mutex. | |
1981 | */ | |
aaf67de7 | 1982 | static int wake_up_session_cb(struct inode *inode, int mds, void *arg) |
2f2dc053 | 1983 | { |
0dc2570f | 1984 | struct ceph_inode_info *ci = ceph_inode(inode); |
d2f8bb27 | 1985 | unsigned long ev = (unsigned long)arg; |
0dc2570f | 1986 | |
d2f8bb27 | 1987 | if (ev == RECONNECT) { |
be655596 | 1988 | spin_lock(&ci->i_ceph_lock); |
0dc2570f SW |
1989 | ci->i_wanted_max_size = 0; |
1990 | ci->i_requested_max_size = 0; | |
be655596 | 1991 | spin_unlock(&ci->i_ceph_lock); |
d2f8bb27 | 1992 | } else if (ev == RENEWCAPS) { |
aaf67de7 XL |
1993 | struct ceph_cap *cap; |
1994 | ||
1995 | spin_lock(&ci->i_ceph_lock); | |
1996 | cap = __get_cap_for_mds(ci, mds); | |
1997 | /* mds did not re-issue stale cap */ | |
1998 | if (cap && cap->cap_gen < atomic_read(&cap->session->s_cap_gen)) | |
d2f8bb27 | 1999 | cap->issued = cap->implemented = CEPH_CAP_PIN; |
aaf67de7 | 2000 | spin_unlock(&ci->i_ceph_lock); |
d2f8bb27 | 2001 | } else if (ev == FORCE_RO) { |
0dc2570f | 2002 | } |
e5360309 | 2003 | wake_up_all(&ci->i_cap_wq); |
2f2dc053 SW |
2004 | return 0; |
2005 | } | |
2006 | ||
d2f8bb27 | 2007 | static void wake_up_session_caps(struct ceph_mds_session *session, int ev) |
2f2dc053 | 2008 | { |
38d46409 XL |
2009 | struct ceph_client *cl = session->s_mdsc->fsc->client; |
2010 | ||
2011 | doutc(cl, "session %p mds%d\n", session, session->s_mds); | |
f5d77269 JL |
2012 | ceph_iterate_session_caps(session, wake_up_session_cb, |
2013 | (void *)(unsigned long)ev); | |
2f2dc053 SW |
2014 | } |
2015 | ||
2016 | /* | |
2017 | * Send periodic message to MDS renewing all currently held caps. The | |
2018 | * ack will reset the expiration for all caps from this session. | |
2019 | * | |
2020 | * caller holds s_mutex | |
2021 | */ | |
2022 | static int send_renew_caps(struct ceph_mds_client *mdsc, | |
2023 | struct ceph_mds_session *session) | |
2024 | { | |
38d46409 | 2025 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
2026 | struct ceph_msg *msg; |
2027 | int state; | |
2028 | ||
2029 | if (time_after_eq(jiffies, session->s_cap_ttl) && | |
2030 | time_after_eq(session->s_cap_ttl, session->s_renew_requested)) | |
38d46409 | 2031 | pr_info_client(cl, "mds%d caps stale\n", session->s_mds); |
e4cb4cb8 | 2032 | session->s_renew_requested = jiffies; |
2f2dc053 SW |
2033 | |
2034 | /* do not try to renew caps until a recovering mds has reconnected | |
2035 | * with its clients. */ | |
2036 | state = ceph_mdsmap_get_state(mdsc->mdsmap, session->s_mds); | |
2037 | if (state < CEPH_MDS_STATE_RECONNECT) { | |
38d46409 XL |
2038 | doutc(cl, "ignoring mds%d (%s)\n", session->s_mds, |
2039 | ceph_mds_state_name(state)); | |
2f2dc053 SW |
2040 | return 0; |
2041 | } | |
2042 | ||
38d46409 XL |
2043 | doutc(cl, "to mds%d (%s)\n", session->s_mds, |
2044 | ceph_mds_state_name(state)); | |
6df89bf2 | 2045 | msg = create_session_full_msg(mdsc, CEPH_SESSION_REQUEST_RENEWCAPS, |
fba97e80 | 2046 | ++session->s_renew_seq); |
6df89bf2 XL |
2047 | if (IS_ERR(msg)) |
2048 | return PTR_ERR(msg); | |
2f2dc053 SW |
2049 | ceph_con_send(&session->s_con, msg); |
2050 | return 0; | |
2051 | } | |
2052 | ||
186e4f7a YZ |
2053 | static int send_flushmsg_ack(struct ceph_mds_client *mdsc, |
2054 | struct ceph_mds_session *session, u64 seq) | |
2055 | { | |
38d46409 | 2056 | struct ceph_client *cl = mdsc->fsc->client; |
186e4f7a YZ |
2057 | struct ceph_msg *msg; |
2058 | ||
38d46409 XL |
2059 | doutc(cl, "to mds%d (%s)s seq %lld\n", session->s_mds, |
2060 | ceph_session_state_name(session->s_state), seq); | |
fba97e80 | 2061 | msg = ceph_create_session_msg(CEPH_SESSION_FLUSHMSG_ACK, seq); |
186e4f7a YZ |
2062 | if (!msg) |
2063 | return -ENOMEM; | |
2064 | ceph_con_send(&session->s_con, msg); | |
2065 | return 0; | |
2066 | } | |
2067 | ||
2068 | ||
2f2dc053 SW |
2069 | /* |
2070 | * Note new cap ttl, and any transition from stale -> not stale (fresh?). | |
0dc2570f SW |
2071 | * |
2072 | * Called under session->s_mutex | |
2f2dc053 SW |
2073 | */ |
2074 | static void renewed_caps(struct ceph_mds_client *mdsc, | |
2075 | struct ceph_mds_session *session, int is_renew) | |
2076 | { | |
38d46409 | 2077 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
2078 | int was_stale; |
2079 | int wake = 0; | |
2080 | ||
2081 | spin_lock(&session->s_cap_lock); | |
1ce208a6 | 2082 | was_stale = is_renew && time_after_eq(jiffies, session->s_cap_ttl); |
2f2dc053 SW |
2083 | |
2084 | session->s_cap_ttl = session->s_renew_requested + | |
2085 | mdsc->mdsmap->m_session_timeout*HZ; | |
2086 | ||
2087 | if (was_stale) { | |
2088 | if (time_before(jiffies, session->s_cap_ttl)) { | |
38d46409 XL |
2089 | pr_info_client(cl, "mds%d caps renewed\n", |
2090 | session->s_mds); | |
2f2dc053 SW |
2091 | wake = 1; |
2092 | } else { | |
38d46409 XL |
2093 | pr_info_client(cl, "mds%d caps still stale\n", |
2094 | session->s_mds); | |
2f2dc053 SW |
2095 | } |
2096 | } | |
38d46409 XL |
2097 | doutc(cl, "mds%d ttl now %lu, was %s, now %s\n", session->s_mds, |
2098 | session->s_cap_ttl, was_stale ? "stale" : "fresh", | |
2099 | time_before(jiffies, session->s_cap_ttl) ? "stale" : "fresh"); | |
2f2dc053 SW |
2100 | spin_unlock(&session->s_cap_lock); |
2101 | ||
2102 | if (wake) | |
d2f8bb27 | 2103 | wake_up_session_caps(session, RENEWCAPS); |
2f2dc053 SW |
2104 | } |
2105 | ||
2106 | /* | |
2107 | * send a session close request | |
2108 | */ | |
3e699bd8 | 2109 | static int request_close_session(struct ceph_mds_session *session) |
2f2dc053 | 2110 | { |
38d46409 | 2111 | struct ceph_client *cl = session->s_mdsc->fsc->client; |
2f2dc053 | 2112 | struct ceph_msg *msg; |
2f2dc053 | 2113 | |
38d46409 XL |
2114 | doutc(cl, "mds%d state %s seq %lld\n", session->s_mds, |
2115 | ceph_session_state_name(session->s_state), session->s_seq); | |
fba97e80 XL |
2116 | msg = ceph_create_session_msg(CEPH_SESSION_REQUEST_CLOSE, |
2117 | session->s_seq); | |
a79832f2 SW |
2118 | if (!msg) |
2119 | return -ENOMEM; | |
2120 | ceph_con_send(&session->s_con, msg); | |
fcff415c | 2121 | return 1; |
2f2dc053 SW |
2122 | } |
2123 | ||
2124 | /* | |
2125 | * Called with s_mutex held. | |
2126 | */ | |
2127 | static int __close_session(struct ceph_mds_client *mdsc, | |
2128 | struct ceph_mds_session *session) | |
2129 | { | |
2130 | if (session->s_state >= CEPH_MDS_SESSION_CLOSING) | |
2131 | return 0; | |
2132 | session->s_state = CEPH_MDS_SESSION_CLOSING; | |
3e699bd8 | 2133 | return request_close_session(session); |
2f2dc053 SW |
2134 | } |
2135 | ||
040d7860 YZ |
2136 | static bool drop_negative_children(struct dentry *dentry) |
2137 | { | |
2138 | struct dentry *child; | |
2139 | bool all_negative = true; | |
2140 | ||
2141 | if (!d_is_dir(dentry)) | |
2142 | goto out; | |
2143 | ||
2144 | spin_lock(&dentry->d_lock); | |
da549bdd | 2145 | hlist_for_each_entry(child, &dentry->d_children, d_sib) { |
040d7860 YZ |
2146 | if (d_really_is_positive(child)) { |
2147 | all_negative = false; | |
2148 | break; | |
2149 | } | |
2150 | } | |
2151 | spin_unlock(&dentry->d_lock); | |
2152 | ||
2153 | if (all_negative) | |
2154 | shrink_dcache_parent(dentry); | |
2155 | out: | |
2156 | return all_negative; | |
2157 | } | |
2158 | ||
2f2dc053 SW |
2159 | /* |
2160 | * Trim old(er) caps. | |
2161 | * | |
2162 | * Because we can't cache an inode without one or more caps, we do | |
2163 | * this indirectly: if a cap is unused, we prune its aliases, at which | |
2164 | * point the inode will hopefully get dropped to. | |
2165 | * | |
2166 | * Yes, this is a bit sloppy. Our only real goal here is to respond to | |
2167 | * memory pressure from the MDS, though, so it needn't be perfect. | |
2168 | */ | |
aaf67de7 | 2169 | static int trim_caps_cb(struct inode *inode, int mds, void *arg) |
2f2dc053 | 2170 | { |
197b7d79 | 2171 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
38d46409 | 2172 | struct ceph_client *cl = mdsc->fsc->client; |
533a2818 | 2173 | int *remaining = arg; |
2f2dc053 | 2174 | struct ceph_inode_info *ci = ceph_inode(inode); |
979abfdd | 2175 | int used, wanted, oissued, mine; |
aaf67de7 | 2176 | struct ceph_cap *cap; |
2f2dc053 | 2177 | |
533a2818 | 2178 | if (*remaining <= 0) |
2f2dc053 SW |
2179 | return -1; |
2180 | ||
be655596 | 2181 | spin_lock(&ci->i_ceph_lock); |
aaf67de7 XL |
2182 | cap = __get_cap_for_mds(ci, mds); |
2183 | if (!cap) { | |
2184 | spin_unlock(&ci->i_ceph_lock); | |
2185 | return 0; | |
2186 | } | |
2f2dc053 SW |
2187 | mine = cap->issued | cap->implemented; |
2188 | used = __ceph_caps_used(ci); | |
979abfdd | 2189 | wanted = __ceph_caps_file_wanted(ci); |
2f2dc053 SW |
2190 | oissued = __ceph_caps_issued_other(ci, cap); |
2191 | ||
38d46409 XL |
2192 | doutc(cl, "%p %llx.%llx cap %p mine %s oissued %s used %s wanted %s\n", |
2193 | inode, ceph_vinop(inode), cap, ceph_cap_string(mine), | |
2194 | ceph_cap_string(oissued), ceph_cap_string(used), | |
2195 | ceph_cap_string(wanted)); | |
979abfdd | 2196 | if (cap == ci->i_auth_cap) { |
622f3e25 YZ |
2197 | if (ci->i_dirty_caps || ci->i_flushing_caps || |
2198 | !list_empty(&ci->i_cap_snaps)) | |
979abfdd YZ |
2199 | goto out; |
2200 | if ((used | wanted) & CEPH_CAP_ANY_WR) | |
2201 | goto out; | |
89aa5930 YZ |
2202 | /* Note: it's possible that i_filelock_ref becomes non-zero |
2203 | * after dropping auth caps. It doesn't hurt because reply | |
2204 | * of lock mds request will re-add auth caps. */ | |
2205 | if (atomic_read(&ci->i_filelock_ref) > 0) | |
2206 | goto out; | |
979abfdd | 2207 | } |
5e804ac4 YZ |
2208 | /* The inode has cached pages, but it's no longer used. |
2209 | * we can safely drop it */ | |
525d15e8 YZ |
2210 | if (S_ISREG(inode->i_mode) && |
2211 | wanted == 0 && used == CEPH_CAP_FILE_CACHE && | |
5e804ac4 YZ |
2212 | !(oissued & CEPH_CAP_FILE_CACHE)) { |
2213 | used = 0; | |
2214 | oissued = 0; | |
2215 | } | |
979abfdd | 2216 | if ((used | wanted) & ~oissued & mine) |
2f2dc053 SW |
2217 | goto out; /* we need these caps */ |
2218 | ||
2f2dc053 SW |
2219 | if (oissued) { |
2220 | /* we aren't the only cap.. just remove us */ | |
197b7d79 | 2221 | ceph_remove_cap(mdsc, cap, true); |
533a2818 | 2222 | (*remaining)--; |
2f2dc053 | 2223 | } else { |
040d7860 | 2224 | struct dentry *dentry; |
5e804ac4 | 2225 | /* try dropping referring dentries */ |
be655596 | 2226 | spin_unlock(&ci->i_ceph_lock); |
040d7860 YZ |
2227 | dentry = d_find_any_alias(inode); |
2228 | if (dentry && drop_negative_children(dentry)) { | |
2229 | int count; | |
2230 | dput(dentry); | |
2231 | d_prune_aliases(inode); | |
2232 | count = atomic_read(&inode->i_count); | |
2233 | if (count == 1) | |
533a2818 | 2234 | (*remaining)--; |
38d46409 XL |
2235 | doutc(cl, "%p %llx.%llx cap %p pruned, count now %d\n", |
2236 | inode, ceph_vinop(inode), cap, count); | |
040d7860 YZ |
2237 | } else { |
2238 | dput(dentry); | |
2239 | } | |
2f2dc053 SW |
2240 | return 0; |
2241 | } | |
2242 | ||
2243 | out: | |
be655596 | 2244 | spin_unlock(&ci->i_ceph_lock); |
2f2dc053 SW |
2245 | return 0; |
2246 | } | |
2247 | ||
2248 | /* | |
2249 | * Trim session cap count down to some max number. | |
2250 | */ | |
e30ee581 ZZ |
2251 | int ceph_trim_caps(struct ceph_mds_client *mdsc, |
2252 | struct ceph_mds_session *session, | |
2253 | int max_caps) | |
2f2dc053 | 2254 | { |
38d46409 | 2255 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
2256 | int trim_caps = session->s_nr_caps - max_caps; |
2257 | ||
38d46409 XL |
2258 | doutc(cl, "mds%d start: %d / %d, trim %d\n", session->s_mds, |
2259 | session->s_nr_caps, max_caps, trim_caps); | |
2f2dc053 | 2260 | if (trim_caps > 0) { |
533a2818 JL |
2261 | int remaining = trim_caps; |
2262 | ||
2263 | ceph_iterate_session_caps(session, trim_caps_cb, &remaining); | |
38d46409 XL |
2264 | doutc(cl, "mds%d done: %d / %d, trimmed %d\n", |
2265 | session->s_mds, session->s_nr_caps, max_caps, | |
2266 | trim_caps - remaining); | |
2f2dc053 | 2267 | } |
a56371d9 | 2268 | |
e3ec8d68 | 2269 | ceph_flush_cap_releases(mdsc, session); |
2f2dc053 SW |
2270 | return 0; |
2271 | } | |
2272 | ||
8310b089 YZ |
2273 | static int check_caps_flush(struct ceph_mds_client *mdsc, |
2274 | u64 want_flush_tid) | |
2275 | { | |
38d46409 | 2276 | struct ceph_client *cl = mdsc->fsc->client; |
8310b089 YZ |
2277 | int ret = 1; |
2278 | ||
2279 | spin_lock(&mdsc->cap_dirty_lock); | |
e4500b5e YZ |
2280 | if (!list_empty(&mdsc->cap_flush_list)) { |
2281 | struct ceph_cap_flush *cf = | |
2282 | list_first_entry(&mdsc->cap_flush_list, | |
2283 | struct ceph_cap_flush, g_list); | |
2284 | if (cf->tid <= want_flush_tid) { | |
38d46409 XL |
2285 | doutc(cl, "still flushing tid %llu <= %llu\n", |
2286 | cf->tid, want_flush_tid); | |
e4500b5e YZ |
2287 | ret = 0; |
2288 | } | |
8310b089 YZ |
2289 | } |
2290 | spin_unlock(&mdsc->cap_dirty_lock); | |
2291 | return ret; | |
d3383a8e YZ |
2292 | } |
2293 | ||
2f2dc053 SW |
2294 | /* |
2295 | * flush all dirty inode data to disk. | |
2296 | * | |
8310b089 | 2297 | * returns true if we've flushed through want_flush_tid |
2f2dc053 | 2298 | */ |
affbc19a | 2299 | static void wait_caps_flush(struct ceph_mds_client *mdsc, |
0e294387 | 2300 | u64 want_flush_tid) |
2f2dc053 | 2301 | { |
38d46409 XL |
2302 | struct ceph_client *cl = mdsc->fsc->client; |
2303 | ||
2304 | doutc(cl, "want %llu\n", want_flush_tid); | |
8310b089 YZ |
2305 | |
2306 | wait_event(mdsc->cap_flushing_wq, | |
2307 | check_caps_flush(mdsc, want_flush_tid)); | |
2308 | ||
38d46409 | 2309 | doutc(cl, "ok, flushed thru %llu\n", want_flush_tid); |
2f2dc053 SW |
2310 | } |
2311 | ||
2312 | /* | |
2313 | * called under s_mutex | |
2314 | */ | |
e3ec8d68 YZ |
2315 | static void ceph_send_cap_releases(struct ceph_mds_client *mdsc, |
2316 | struct ceph_mds_session *session) | |
2f2dc053 | 2317 | { |
38d46409 | 2318 | struct ceph_client *cl = mdsc->fsc->client; |
745a8e3b YZ |
2319 | struct ceph_msg *msg = NULL; |
2320 | struct ceph_mds_cap_release *head; | |
2321 | struct ceph_mds_cap_item *item; | |
92475f05 | 2322 | struct ceph_osd_client *osdc = &mdsc->fsc->client->osdc; |
745a8e3b YZ |
2323 | struct ceph_cap *cap; |
2324 | LIST_HEAD(tmp_list); | |
2325 | int num_cap_releases; | |
92475f05 JL |
2326 | __le32 barrier, *cap_barrier; |
2327 | ||
2328 | down_read(&osdc->lock); | |
2329 | barrier = cpu_to_le32(osdc->epoch_barrier); | |
2330 | up_read(&osdc->lock); | |
2f2dc053 | 2331 | |
0f8605f2 | 2332 | spin_lock(&session->s_cap_lock); |
745a8e3b YZ |
2333 | again: |
2334 | list_splice_init(&session->s_cap_releases, &tmp_list); | |
2335 | num_cap_releases = session->s_num_cap_releases; | |
2336 | session->s_num_cap_releases = 0; | |
2f2dc053 | 2337 | spin_unlock(&session->s_cap_lock); |
e01a5946 | 2338 | |
745a8e3b YZ |
2339 | while (!list_empty(&tmp_list)) { |
2340 | if (!msg) { | |
2341 | msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPRELEASE, | |
09cbfeaf | 2342 | PAGE_SIZE, GFP_NOFS, false); |
745a8e3b YZ |
2343 | if (!msg) |
2344 | goto out_err; | |
2345 | head = msg->front.iov_base; | |
2346 | head->num = cpu_to_le32(0); | |
2347 | msg->front.iov_len = sizeof(*head); | |
92475f05 JL |
2348 | |
2349 | msg->hdr.version = cpu_to_le16(2); | |
2350 | msg->hdr.compat_version = cpu_to_le16(1); | |
745a8e3b | 2351 | } |
92475f05 | 2352 | |
745a8e3b YZ |
2353 | cap = list_first_entry(&tmp_list, struct ceph_cap, |
2354 | session_caps); | |
2355 | list_del(&cap->session_caps); | |
2356 | num_cap_releases--; | |
e01a5946 | 2357 | |
00bd8edb | 2358 | head = msg->front.iov_base; |
4198aba4 JL |
2359 | put_unaligned_le32(get_unaligned_le32(&head->num) + 1, |
2360 | &head->num); | |
745a8e3b YZ |
2361 | item = msg->front.iov_base + msg->front.iov_len; |
2362 | item->ino = cpu_to_le64(cap->cap_ino); | |
2363 | item->cap_id = cpu_to_le64(cap->cap_id); | |
2364 | item->migrate_seq = cpu_to_le32(cap->mseq); | |
2365 | item->seq = cpu_to_le32(cap->issue_seq); | |
2366 | msg->front.iov_len += sizeof(*item); | |
2367 | ||
2368 | ceph_put_cap(mdsc, cap); | |
2369 | ||
2370 | if (le32_to_cpu(head->num) == CEPH_CAPS_PER_RELEASE) { | |
92475f05 JL |
2371 | // Append cap_barrier field |
2372 | cap_barrier = msg->front.iov_base + msg->front.iov_len; | |
2373 | *cap_barrier = barrier; | |
2374 | msg->front.iov_len += sizeof(*cap_barrier); | |
2375 | ||
745a8e3b | 2376 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); |
38d46409 | 2377 | doutc(cl, "mds%d %p\n", session->s_mds, msg); |
745a8e3b YZ |
2378 | ceph_con_send(&session->s_con, msg); |
2379 | msg = NULL; | |
2380 | } | |
00bd8edb | 2381 | } |
e01a5946 | 2382 | |
745a8e3b | 2383 | BUG_ON(num_cap_releases != 0); |
e01a5946 | 2384 | |
745a8e3b YZ |
2385 | spin_lock(&session->s_cap_lock); |
2386 | if (!list_empty(&session->s_cap_releases)) | |
2387 | goto again; | |
2388 | spin_unlock(&session->s_cap_lock); | |
2389 | ||
2390 | if (msg) { | |
92475f05 JL |
2391 | // Append cap_barrier field |
2392 | cap_barrier = msg->front.iov_base + msg->front.iov_len; | |
2393 | *cap_barrier = barrier; | |
2394 | msg->front.iov_len += sizeof(*cap_barrier); | |
2395 | ||
745a8e3b | 2396 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); |
38d46409 | 2397 | doutc(cl, "mds%d %p\n", session->s_mds, msg); |
745a8e3b | 2398 | ceph_con_send(&session->s_con, msg); |
e01a5946 | 2399 | } |
745a8e3b YZ |
2400 | return; |
2401 | out_err: | |
38d46409 XL |
2402 | pr_err_client(cl, "mds%d, failed to allocate message\n", |
2403 | session->s_mds); | |
745a8e3b YZ |
2404 | spin_lock(&session->s_cap_lock); |
2405 | list_splice(&tmp_list, &session->s_cap_releases); | |
2406 | session->s_num_cap_releases += num_cap_releases; | |
2407 | spin_unlock(&session->s_cap_lock); | |
e01a5946 SW |
2408 | } |
2409 | ||
e3ec8d68 YZ |
2410 | static void ceph_cap_release_work(struct work_struct *work) |
2411 | { | |
2412 | struct ceph_mds_session *session = | |
2413 | container_of(work, struct ceph_mds_session, s_cap_release_work); | |
2414 | ||
2415 | mutex_lock(&session->s_mutex); | |
2416 | if (session->s_state == CEPH_MDS_SESSION_OPEN || | |
2417 | session->s_state == CEPH_MDS_SESSION_HUNG) | |
2418 | ceph_send_cap_releases(session->s_mdsc, session); | |
2419 | mutex_unlock(&session->s_mutex); | |
2420 | ceph_put_mds_session(session); | |
2421 | } | |
2422 | ||
2423 | void ceph_flush_cap_releases(struct ceph_mds_client *mdsc, | |
2424 | struct ceph_mds_session *session) | |
2425 | { | |
38d46409 | 2426 | struct ceph_client *cl = mdsc->fsc->client; |
e3ec8d68 YZ |
2427 | if (mdsc->stopping) |
2428 | return; | |
2429 | ||
5b3248c6 | 2430 | ceph_get_mds_session(session); |
e3ec8d68 YZ |
2431 | if (queue_work(mdsc->fsc->cap_wq, |
2432 | &session->s_cap_release_work)) { | |
38d46409 | 2433 | doutc(cl, "cap release work queued\n"); |
e3ec8d68 YZ |
2434 | } else { |
2435 | ceph_put_mds_session(session); | |
38d46409 | 2436 | doutc(cl, "failed to queue cap release work\n"); |
e3ec8d68 YZ |
2437 | } |
2438 | } | |
2439 | ||
2440 | /* | |
2441 | * caller holds session->s_cap_lock | |
2442 | */ | |
2443 | void __ceph_queue_cap_release(struct ceph_mds_session *session, | |
2444 | struct ceph_cap *cap) | |
2445 | { | |
2446 | list_add_tail(&cap->session_caps, &session->s_cap_releases); | |
2447 | session->s_num_cap_releases++; | |
2448 | ||
2449 | if (!(session->s_num_cap_releases % CEPH_CAPS_PER_RELEASE)) | |
2450 | ceph_flush_cap_releases(session->s_mdsc, session); | |
2451 | } | |
2452 | ||
37c4efc1 YZ |
2453 | static void ceph_cap_reclaim_work(struct work_struct *work) |
2454 | { | |
2455 | struct ceph_mds_client *mdsc = | |
2456 | container_of(work, struct ceph_mds_client, cap_reclaim_work); | |
2457 | int ret = ceph_trim_dentries(mdsc); | |
2458 | if (ret == -EAGAIN) | |
2459 | ceph_queue_cap_reclaim_work(mdsc); | |
2460 | } | |
2461 | ||
2462 | void ceph_queue_cap_reclaim_work(struct ceph_mds_client *mdsc) | |
2463 | { | |
38d46409 | 2464 | struct ceph_client *cl = mdsc->fsc->client; |
37c4efc1 YZ |
2465 | if (mdsc->stopping) |
2466 | return; | |
2467 | ||
2468 | if (queue_work(mdsc->fsc->cap_wq, &mdsc->cap_reclaim_work)) { | |
38d46409 | 2469 | doutc(cl, "caps reclaim work queued\n"); |
37c4efc1 | 2470 | } else { |
38d46409 | 2471 | doutc(cl, "failed to queue caps release work\n"); |
37c4efc1 YZ |
2472 | } |
2473 | } | |
2474 | ||
fe33032d YZ |
2475 | void ceph_reclaim_caps_nr(struct ceph_mds_client *mdsc, int nr) |
2476 | { | |
2477 | int val; | |
2478 | if (!nr) | |
2479 | return; | |
2480 | val = atomic_add_return(nr, &mdsc->cap_reclaim_pending); | |
bba1560b | 2481 | if ((val % CEPH_CAPS_PER_RELEASE) < nr) { |
fe33032d YZ |
2482 | atomic_set(&mdsc->cap_reclaim_pending, 0); |
2483 | ceph_queue_cap_reclaim_work(mdsc); | |
2484 | } | |
2485 | } | |
2486 | ||
dbc347ef XL |
2487 | void ceph_queue_cap_unlink_work(struct ceph_mds_client *mdsc) |
2488 | { | |
2489 | struct ceph_client *cl = mdsc->fsc->client; | |
2490 | if (mdsc->stopping) | |
2491 | return; | |
2492 | ||
2493 | if (queue_work(mdsc->fsc->cap_wq, &mdsc->cap_unlink_work)) { | |
2494 | doutc(cl, "caps unlink work queued\n"); | |
2495 | } else { | |
2496 | doutc(cl, "failed to queue caps unlink work\n"); | |
2497 | } | |
2498 | } | |
2499 | ||
2500 | static void ceph_cap_unlink_work(struct work_struct *work) | |
2501 | { | |
2502 | struct ceph_mds_client *mdsc = | |
2503 | container_of(work, struct ceph_mds_client, cap_unlink_work); | |
2504 | struct ceph_client *cl = mdsc->fsc->client; | |
2505 | ||
2506 | doutc(cl, "begin\n"); | |
2507 | spin_lock(&mdsc->cap_unlink_delay_lock); | |
2508 | while (!list_empty(&mdsc->cap_unlink_delay_list)) { | |
2509 | struct ceph_inode_info *ci; | |
2510 | struct inode *inode; | |
2511 | ||
2512 | ci = list_first_entry(&mdsc->cap_unlink_delay_list, | |
2513 | struct ceph_inode_info, | |
2514 | i_cap_delay_list); | |
2515 | list_del_init(&ci->i_cap_delay_list); | |
2516 | ||
2517 | inode = igrab(&ci->netfs.inode); | |
2518 | if (inode) { | |
2519 | spin_unlock(&mdsc->cap_unlink_delay_lock); | |
2520 | doutc(cl, "on %p %llx.%llx\n", inode, | |
2521 | ceph_vinop(inode)); | |
2522 | ceph_check_caps(ci, CHECK_CAPS_FLUSH); | |
2523 | iput(inode); | |
2524 | spin_lock(&mdsc->cap_unlink_delay_lock); | |
2525 | } | |
2526 | } | |
2527 | spin_unlock(&mdsc->cap_unlink_delay_lock); | |
2528 | doutc(cl, "done\n"); | |
2529 | } | |
2530 | ||
2f2dc053 SW |
2531 | /* |
2532 | * requests | |
2533 | */ | |
2534 | ||
54008399 YZ |
2535 | int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req, |
2536 | struct inode *dir) | |
2537 | { | |
2538 | struct ceph_inode_info *ci = ceph_inode(dir); | |
2539 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
2540 | struct ceph_mount_options *opt = req->r_mdsc->fsc->mount_options; | |
2a5beea3 | 2541 | size_t size = sizeof(struct ceph_mds_reply_dir_entry); |
ad8c28a9 JL |
2542 | unsigned int num_entries; |
2543 | int order; | |
54008399 YZ |
2544 | |
2545 | spin_lock(&ci->i_ceph_lock); | |
2546 | num_entries = ci->i_files + ci->i_subdirs; | |
2547 | spin_unlock(&ci->i_ceph_lock); | |
ad8c28a9 | 2548 | num_entries = max(num_entries, 1U); |
54008399 YZ |
2549 | num_entries = min(num_entries, opt->max_readdir); |
2550 | ||
2551 | order = get_order(size * num_entries); | |
2552 | while (order >= 0) { | |
2a5beea3 | 2553 | rinfo->dir_entries = (void*)__get_free_pages(GFP_KERNEL | |
2941bf53 XL |
2554 | __GFP_NOWARN | |
2555 | __GFP_ZERO, | |
2a5beea3 YZ |
2556 | order); |
2557 | if (rinfo->dir_entries) | |
54008399 YZ |
2558 | break; |
2559 | order--; | |
2560 | } | |
2a5beea3 | 2561 | if (!rinfo->dir_entries) |
54008399 YZ |
2562 | return -ENOMEM; |
2563 | ||
2564 | num_entries = (PAGE_SIZE << order) / size; | |
2565 | num_entries = min(num_entries, opt->max_readdir); | |
2566 | ||
2567 | rinfo->dir_buf_size = PAGE_SIZE << order; | |
2568 | req->r_num_caps = num_entries + 1; | |
2569 | req->r_args.readdir.max_entries = cpu_to_le32(num_entries); | |
2570 | req->r_args.readdir.max_bytes = cpu_to_le32(opt->max_readdir_bytes); | |
2571 | return 0; | |
2572 | } | |
2573 | ||
2f2dc053 SW |
2574 | /* |
2575 | * Create an mds request. | |
2576 | */ | |
2577 | struct ceph_mds_request * | |
2578 | ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode) | |
2579 | { | |
058daab7 | 2580 | struct ceph_mds_request *req; |
2f2dc053 | 2581 | |
058daab7 | 2582 | req = kmem_cache_zalloc(ceph_mds_request_cachep, GFP_NOFS); |
2f2dc053 SW |
2583 | if (!req) |
2584 | return ERR_PTR(-ENOMEM); | |
2585 | ||
b4556396 | 2586 | mutex_init(&req->r_fill_mutex); |
37151668 | 2587 | req->r_mdsc = mdsc; |
2f2dc053 | 2588 | req->r_started = jiffies; |
70c94820 | 2589 | req->r_start_latency = ktime_get(); |
2f2dc053 SW |
2590 | req->r_resend_mds = -1; |
2591 | INIT_LIST_HEAD(&req->r_unsafe_dir_item); | |
68cd5b4b | 2592 | INIT_LIST_HEAD(&req->r_unsafe_target_item); |
2f2dc053 | 2593 | req->r_fmode = -1; |
6eb06c46 | 2594 | req->r_feature_needed = -1; |
153c8e6b | 2595 | kref_init(&req->r_kref); |
fcd00b68 | 2596 | RB_CLEAR_NODE(&req->r_node); |
2f2dc053 SW |
2597 | INIT_LIST_HEAD(&req->r_wait); |
2598 | init_completion(&req->r_completion); | |
2599 | init_completion(&req->r_safe_completion); | |
2600 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
2601 | ||
668c9a61 | 2602 | ktime_get_coarse_real_ts64(&req->r_stamp); |
b8e69066 | 2603 | |
2f2dc053 SW |
2604 | req->r_op = op; |
2605 | req->r_direct_mode = mode; | |
2606 | return req; | |
2607 | } | |
2608 | ||
2609 | /* | |
44ca18f2 | 2610 | * return oldest (lowest) request, tid in request tree, 0 if none. |
2f2dc053 SW |
2611 | * |
2612 | * called under mdsc->mutex. | |
2613 | */ | |
44ca18f2 SW |
2614 | static struct ceph_mds_request *__get_oldest_req(struct ceph_mds_client *mdsc) |
2615 | { | |
2616 | if (RB_EMPTY_ROOT(&mdsc->request_tree)) | |
2617 | return NULL; | |
2618 | return rb_entry(rb_first(&mdsc->request_tree), | |
2619 | struct ceph_mds_request, r_node); | |
2620 | } | |
2621 | ||
e8a7b8b1 | 2622 | static inline u64 __get_oldest_tid(struct ceph_mds_client *mdsc) |
2f2dc053 | 2623 | { |
e8a7b8b1 | 2624 | return mdsc->oldest_tid; |
2f2dc053 SW |
2625 | } |
2626 | ||
24865e75 JL |
2627 | #if IS_ENABLED(CONFIG_FS_ENCRYPTION) |
2628 | static u8 *get_fscrypt_altname(const struct ceph_mds_request *req, u32 *plen) | |
2629 | { | |
2630 | struct inode *dir = req->r_parent; | |
2631 | struct dentry *dentry = req->r_dentry; | |
2632 | u8 *cryptbuf = NULL; | |
2633 | u32 len = 0; | |
2634 | int ret = 0; | |
2635 | ||
2636 | /* only encode if we have parent and dentry */ | |
2637 | if (!dir || !dentry) | |
2638 | goto success; | |
2639 | ||
2640 | /* No-op unless this is encrypted */ | |
2641 | if (!IS_ENCRYPTED(dir)) | |
2642 | goto success; | |
2643 | ||
14e034a6 LH |
2644 | ret = ceph_fscrypt_prepare_readdir(dir); |
2645 | if (ret < 0) | |
24865e75 JL |
2646 | return ERR_PTR(ret); |
2647 | ||
2648 | /* No key? Just ignore it. */ | |
2649 | if (!fscrypt_has_encryption_key(dir)) | |
2650 | goto success; | |
2651 | ||
2652 | if (!fscrypt_fname_encrypted_size(dir, dentry->d_name.len, NAME_MAX, | |
2653 | &len)) { | |
2654 | WARN_ON_ONCE(1); | |
2655 | return ERR_PTR(-ENAMETOOLONG); | |
2656 | } | |
2657 | ||
2658 | /* No need to append altname if name is short enough */ | |
2659 | if (len <= CEPH_NOHASH_NAME_MAX) { | |
2660 | len = 0; | |
2661 | goto success; | |
2662 | } | |
2663 | ||
2664 | cryptbuf = kmalloc(len, GFP_KERNEL); | |
2665 | if (!cryptbuf) | |
2666 | return ERR_PTR(-ENOMEM); | |
2667 | ||
2668 | ret = fscrypt_fname_encrypt(dir, &dentry->d_name, cryptbuf, len); | |
2669 | if (ret) { | |
2670 | kfree(cryptbuf); | |
2671 | return ERR_PTR(ret); | |
2672 | } | |
2673 | success: | |
2674 | *plen = len; | |
2675 | return cryptbuf; | |
2676 | } | |
2677 | #else | |
2678 | static u8 *get_fscrypt_altname(const struct ceph_mds_request *req, u32 *plen) | |
2679 | { | |
2680 | *plen = 0; | |
2681 | return NULL; | |
2682 | } | |
2683 | #endif | |
2684 | ||
3fd945a7 JL |
2685 | /** |
2686 | * ceph_mdsc_build_path - build a path string to a given dentry | |
197b7d79 | 2687 | * @mdsc: mds client |
3fd945a7 JL |
2688 | * @dentry: dentry to which path should be built |
2689 | * @plen: returned length of string | |
2690 | * @pbase: returned base inode number | |
2691 | * @for_wire: is this path going to be sent to the MDS? | |
2692 | * | |
2693 | * Build a string that represents the path to the dentry. This is mostly called | |
2694 | * for two different purposes: | |
2695 | * | |
2696 | * 1) we need to build a path string to send to the MDS (for_wire == true) | |
2697 | * 2) we need a path string for local presentation (e.g. debugfs) | |
2698 | * (for_wire == false) | |
2f2dc053 | 2699 | * |
3fd945a7 JL |
2700 | * The path is built in reverse, starting with the dentry. Walk back up toward |
2701 | * the root, building the path until the first non-snapped inode is reached | |
2702 | * (for_wire) or the root inode is reached (!for_wire). | |
2f2dc053 SW |
2703 | * |
2704 | * Encode hidden .snap dirs as a double /, i.e. | |
2705 | * foo/.snap/bar -> foo//bar | |
2706 | */ | |
197b7d79 XL |
2707 | char *ceph_mdsc_build_path(struct ceph_mds_client *mdsc, struct dentry *dentry, |
2708 | int *plen, u64 *pbase, int for_wire) | |
2f2dc053 | 2709 | { |
38d46409 | 2710 | struct ceph_client *cl = mdsc->fsc->client; |
4c793d4c JL |
2711 | struct dentry *cur; |
2712 | struct inode *inode; | |
2f2dc053 | 2713 | char *path; |
f77f21bb | 2714 | int pos; |
1b71fe2e | 2715 | unsigned seq; |
69a10fb3 | 2716 | u64 base; |
2f2dc053 | 2717 | |
d37b1d99 | 2718 | if (!dentry) |
2f2dc053 SW |
2719 | return ERR_PTR(-EINVAL); |
2720 | ||
f77f21bb | 2721 | path = __getname(); |
d37b1d99 | 2722 | if (!path) |
2f2dc053 | 2723 | return ERR_PTR(-ENOMEM); |
f77f21bb JL |
2724 | retry: |
2725 | pos = PATH_MAX - 1; | |
2726 | path[pos] = '\0'; | |
2727 | ||
2728 | seq = read_seqbegin(&rename_lock); | |
4c793d4c | 2729 | cur = dget(dentry); |
f77f21bb | 2730 | for (;;) { |
3fd945a7 | 2731 | struct dentry *parent; |
2f2dc053 | 2732 | |
4c793d4c JL |
2733 | spin_lock(&cur->d_lock); |
2734 | inode = d_inode(cur); | |
2f2dc053 | 2735 | if (inode && ceph_snap(inode) == CEPH_SNAPDIR) { |
38d46409 | 2736 | doutc(cl, "path+%d: %p SNAPDIR\n", pos, cur); |
3fd945a7 JL |
2737 | spin_unlock(&cur->d_lock); |
2738 | parent = dget_parent(cur); | |
2739 | } else if (for_wire && inode && dentry != cur && | |
2f2dc053 | 2740 | ceph_snap(inode) == CEPH_NOSNAP) { |
4c793d4c | 2741 | spin_unlock(&cur->d_lock); |
d6b8bd67 | 2742 | pos++; /* get rid of any prepended '/' */ |
2f2dc053 | 2743 | break; |
3fd945a7 | 2744 | } else if (!for_wire || !IS_ENCRYPTED(d_inode(cur->d_parent))) { |
4c793d4c | 2745 | pos -= cur->d_name.len; |
1b71fe2e | 2746 | if (pos < 0) { |
4c793d4c | 2747 | spin_unlock(&cur->d_lock); |
2f2dc053 | 2748 | break; |
1b71fe2e | 2749 | } |
4c793d4c | 2750 | memcpy(path + pos, cur->d_name.name, cur->d_name.len); |
3fd945a7 JL |
2751 | spin_unlock(&cur->d_lock); |
2752 | parent = dget_parent(cur); | |
2753 | } else { | |
2754 | int len, ret; | |
2755 | char buf[NAME_MAX]; | |
2756 | ||
2757 | /* | |
2758 | * Proactively copy name into buf, in case we need to | |
2759 | * present it as-is. | |
2760 | */ | |
2761 | memcpy(buf, cur->d_name.name, cur->d_name.len); | |
2762 | len = cur->d_name.len; | |
2763 | spin_unlock(&cur->d_lock); | |
2764 | parent = dget_parent(cur); | |
2765 | ||
14e034a6 | 2766 | ret = ceph_fscrypt_prepare_readdir(d_inode(parent)); |
3fd945a7 JL |
2767 | if (ret < 0) { |
2768 | dput(parent); | |
2769 | dput(cur); | |
2770 | return ERR_PTR(ret); | |
2771 | } | |
2772 | ||
2773 | if (fscrypt_has_encryption_key(d_inode(parent))) { | |
2774 | len = ceph_encode_encrypted_fname(d_inode(parent), | |
2775 | cur, buf); | |
2776 | if (len < 0) { | |
2777 | dput(parent); | |
2778 | dput(cur); | |
2779 | return ERR_PTR(len); | |
2780 | } | |
2781 | } | |
2782 | pos -= len; | |
2783 | if (pos < 0) { | |
2784 | dput(parent); | |
2785 | break; | |
2786 | } | |
2787 | memcpy(path + pos, buf, len); | |
2f2dc053 | 2788 | } |
3fd945a7 JL |
2789 | dput(cur); |
2790 | cur = parent; | |
f77f21bb JL |
2791 | |
2792 | /* Are we at the root? */ | |
4c793d4c | 2793 | if (IS_ROOT(cur)) |
f77f21bb JL |
2794 | break; |
2795 | ||
2796 | /* Are we out of buffer? */ | |
2797 | if (--pos < 0) | |
2798 | break; | |
2799 | ||
2800 | path[pos] = '/'; | |
2f2dc053 | 2801 | } |
4c793d4c JL |
2802 | inode = d_inode(cur); |
2803 | base = inode ? ceph_ino(inode) : 0; | |
2804 | dput(cur); | |
f5946bcc JL |
2805 | |
2806 | if (read_seqretry(&rename_lock, seq)) | |
2807 | goto retry; | |
2808 | ||
2809 | if (pos < 0) { | |
2810 | /* | |
2811 | * A rename didn't occur, but somehow we didn't end up where | |
2812 | * we thought we would. Throw a warning and try again. | |
2813 | */ | |
38d46409 XL |
2814 | pr_warn_client(cl, "did not end path lookup where expected (pos = %d)\n", |
2815 | pos); | |
2f2dc053 SW |
2816 | goto retry; |
2817 | } | |
2818 | ||
69a10fb3 | 2819 | *pbase = base; |
f77f21bb | 2820 | *plen = PATH_MAX - 1 - pos; |
38d46409 XL |
2821 | doutc(cl, "on %p %d built %llx '%.*s'\n", dentry, d_count(dentry), |
2822 | base, *plen, path + pos); | |
f77f21bb | 2823 | return path + pos; |
2f2dc053 SW |
2824 | } |
2825 | ||
197b7d79 XL |
2826 | static int build_dentry_path(struct ceph_mds_client *mdsc, struct dentry *dentry, |
2827 | struct inode *dir, const char **ppath, int *ppathlen, | |
2828 | u64 *pino, bool *pfreepath, bool parent_locked) | |
2f2dc053 SW |
2829 | { |
2830 | char *path; | |
2831 | ||
c6b0b656 | 2832 | rcu_read_lock(); |
fd36a717 JL |
2833 | if (!dir) |
2834 | dir = d_inode_rcu(dentry->d_parent); | |
3fd945a7 JL |
2835 | if (dir && parent_locked && ceph_snap(dir) == CEPH_NOSNAP && |
2836 | !IS_ENCRYPTED(dir)) { | |
c6b0b656 JL |
2837 | *pino = ceph_ino(dir); |
2838 | rcu_read_unlock(); | |
964fff74 JL |
2839 | *ppath = dentry->d_name.name; |
2840 | *ppathlen = dentry->d_name.len; | |
2f2dc053 SW |
2841 | return 0; |
2842 | } | |
c6b0b656 | 2843 | rcu_read_unlock(); |
197b7d79 | 2844 | path = ceph_mdsc_build_path(mdsc, dentry, ppathlen, pino, 1); |
2f2dc053 SW |
2845 | if (IS_ERR(path)) |
2846 | return PTR_ERR(path); | |
2847 | *ppath = path; | |
1bcb3440 | 2848 | *pfreepath = true; |
2f2dc053 SW |
2849 | return 0; |
2850 | } | |
2851 | ||
2852 | static int build_inode_path(struct inode *inode, | |
2853 | const char **ppath, int *ppathlen, u64 *pino, | |
1bcb3440 | 2854 | bool *pfreepath) |
2f2dc053 | 2855 | { |
197b7d79 | 2856 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
2f2dc053 SW |
2857 | struct dentry *dentry; |
2858 | char *path; | |
2859 | ||
2860 | if (ceph_snap(inode) == CEPH_NOSNAP) { | |
2861 | *pino = ceph_ino(inode); | |
2862 | *ppathlen = 0; | |
2863 | return 0; | |
2864 | } | |
2865 | dentry = d_find_alias(inode); | |
197b7d79 | 2866 | path = ceph_mdsc_build_path(mdsc, dentry, ppathlen, pino, 1); |
2f2dc053 SW |
2867 | dput(dentry); |
2868 | if (IS_ERR(path)) | |
2869 | return PTR_ERR(path); | |
2870 | *ppath = path; | |
1bcb3440 | 2871 | *pfreepath = true; |
2f2dc053 SW |
2872 | return 0; |
2873 | } | |
2874 | ||
2875 | /* | |
2876 | * request arguments may be specified via an inode *, a dentry *, or | |
2877 | * an explicit ino+path. | |
2878 | */ | |
197b7d79 XL |
2879 | static int set_request_path_attr(struct ceph_mds_client *mdsc, struct inode *rinode, |
2880 | struct dentry *rdentry, struct inode *rdiri, | |
2881 | const char *rpath, u64 rino, const char **ppath, | |
2882 | int *pathlen, u64 *ino, bool *freepath, | |
2883 | bool parent_locked) | |
2f2dc053 | 2884 | { |
38d46409 | 2885 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
2886 | int r = 0; |
2887 | ||
2888 | if (rinode) { | |
2889 | r = build_inode_path(rinode, ppath, pathlen, ino, freepath); | |
38d46409 XL |
2890 | doutc(cl, " inode %p %llx.%llx\n", rinode, ceph_ino(rinode), |
2891 | ceph_snap(rinode)); | |
2f2dc053 | 2892 | } else if (rdentry) { |
197b7d79 | 2893 | r = build_dentry_path(mdsc, rdentry, rdiri, ppath, pathlen, ino, |
1bcb3440 | 2894 | freepath, parent_locked); |
38d46409 | 2895 | doutc(cl, " dentry %p %llx/%.*s\n", rdentry, *ino, *pathlen, *ppath); |
795858db | 2896 | } else if (rpath || rino) { |
2f2dc053 SW |
2897 | *ino = rino; |
2898 | *ppath = rpath; | |
b000056a | 2899 | *pathlen = rpath ? strlen(rpath) : 0; |
38d46409 | 2900 | doutc(cl, " path %.*s\n", *pathlen, rpath); |
2f2dc053 SW |
2901 | } |
2902 | ||
2903 | return r; | |
2904 | } | |
2905 | ||
2d332d5b JL |
2906 | static void encode_mclientrequest_tail(void **p, |
2907 | const struct ceph_mds_request *req) | |
60267ba3 ID |
2908 | { |
2909 | struct ceph_timespec ts; | |
2910 | int i; | |
2911 | ||
2912 | ceph_encode_timespec64(&ts, &req->r_stamp); | |
2913 | ceph_encode_copy(p, &ts, sizeof(ts)); | |
2914 | ||
24865e75 | 2915 | /* v4: gid_list */ |
60267ba3 ID |
2916 | ceph_encode_32(p, req->r_cred->group_info->ngroups); |
2917 | for (i = 0; i < req->r_cred->group_info->ngroups; i++) | |
2918 | ceph_encode_64(p, from_kgid(&init_user_ns, | |
2919 | req->r_cred->group_info->gid[i])); | |
2d332d5b | 2920 | |
24865e75 JL |
2921 | /* v5: altname */ |
2922 | ceph_encode_32(p, req->r_altname_len); | |
2923 | ceph_encode_copy(p, req->r_altname, req->r_altname_len); | |
2d332d5b JL |
2924 | |
2925 | /* v6: fscrypt_auth and fscrypt_file */ | |
2926 | if (req->r_fscrypt_auth) { | |
2927 | u32 authlen = ceph_fscrypt_auth_len(req->r_fscrypt_auth); | |
2928 | ||
2929 | ceph_encode_32(p, authlen); | |
2930 | ceph_encode_copy(p, req->r_fscrypt_auth, authlen); | |
2931 | } else { | |
2932 | ceph_encode_32(p, 0); | |
2933 | } | |
16be62fc JL |
2934 | if (test_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags)) { |
2935 | ceph_encode_32(p, sizeof(__le64)); | |
2936 | ceph_encode_64(p, req->r_fscrypt_file); | |
2937 | } else { | |
2938 | ceph_encode_32(p, 0); | |
2939 | } | |
60267ba3 ID |
2940 | } |
2941 | ||
5ccd8530 CB |
2942 | static inline u16 mds_supported_head_version(struct ceph_mds_session *session) |
2943 | { | |
2944 | if (!test_bit(CEPHFS_FEATURE_32BITS_RETRY_FWD, &session->s_features)) | |
2945 | return 1; | |
2946 | ||
2947 | if (!test_bit(CEPHFS_FEATURE_HAS_OWNER_UIDGID, &session->s_features)) | |
2948 | return 2; | |
2949 | ||
2950 | return CEPH_MDS_REQUEST_HEAD_VERSION; | |
2951 | } | |
2952 | ||
ce0d5bd3 XL |
2953 | static struct ceph_mds_request_head_legacy * |
2954 | find_legacy_request_head(void *p, u64 features) | |
2955 | { | |
2956 | bool legacy = !(features & CEPH_FEATURE_FS_BTIME); | |
2957 | struct ceph_mds_request_head_old *ohead; | |
2958 | ||
2959 | if (legacy) | |
2960 | return (struct ceph_mds_request_head_legacy *)p; | |
2961 | ohead = (struct ceph_mds_request_head_old *)p; | |
2962 | return (struct ceph_mds_request_head_legacy *)&ohead->oldest_client_tid; | |
2963 | } | |
2964 | ||
2f2dc053 SW |
2965 | /* |
2966 | * called under mdsc->mutex | |
2967 | */ | |
4f1ddb1e | 2968 | static struct ceph_msg *create_request_message(struct ceph_mds_session *session, |
2f2dc053 | 2969 | struct ceph_mds_request *req, |
4f1ddb1e | 2970 | bool drop_cap_releases) |
2f2dc053 | 2971 | { |
4f1ddb1e JL |
2972 | int mds = session->s_mds; |
2973 | struct ceph_mds_client *mdsc = session->s_mdsc; | |
5ccd8530 | 2974 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 | 2975 | struct ceph_msg *msg; |
ce0d5bd3 | 2976 | struct ceph_mds_request_head_legacy *lhead; |
2f2dc053 SW |
2977 | const char *path1 = NULL; |
2978 | const char *path2 = NULL; | |
2979 | u64 ino1 = 0, ino2 = 0; | |
2980 | int pathlen1 = 0, pathlen2 = 0; | |
1bcb3440 | 2981 | bool freepath1 = false, freepath2 = false; |
a5ffd7b6 | 2982 | struct dentry *old_dentry = NULL; |
60267ba3 | 2983 | int len; |
2f2dc053 SW |
2984 | u16 releases; |
2985 | void *p, *end; | |
2986 | int ret; | |
4f1ddb1e | 2987 | bool legacy = !(session->s_con.peer_features & CEPH_FEATURE_FS_BTIME); |
5ccd8530 | 2988 | u16 request_head_version = mds_supported_head_version(session); |
673478b6 AM |
2989 | kuid_t caller_fsuid = req->r_cred->fsuid; |
2990 | kgid_t caller_fsgid = req->r_cred->fsgid; | |
2f2dc053 | 2991 | |
197b7d79 | 2992 | ret = set_request_path_attr(mdsc, req->r_inode, req->r_dentry, |
3dd69aab | 2993 | req->r_parent, req->r_path1, req->r_ino1.ino, |
1bcb3440 JL |
2994 | &path1, &pathlen1, &ino1, &freepath1, |
2995 | test_bit(CEPH_MDS_R_PARENT_LOCKED, | |
2996 | &req->r_req_flags)); | |
2f2dc053 SW |
2997 | if (ret < 0) { |
2998 | msg = ERR_PTR(ret); | |
2999 | goto out; | |
3000 | } | |
3001 | ||
1bcb3440 | 3002 | /* If r_old_dentry is set, then assume that its parent is locked */ |
a5ffd7b6 XL |
3003 | if (req->r_old_dentry && |
3004 | !(req->r_old_dentry->d_flags & DCACHE_DISCONNECTED)) | |
3005 | old_dentry = req->r_old_dentry; | |
197b7d79 | 3006 | ret = set_request_path_attr(mdsc, NULL, old_dentry, |
fd36a717 | 3007 | req->r_old_dentry_dir, |
2f2dc053 | 3008 | req->r_path2, req->r_ino2.ino, |
1bcb3440 | 3009 | &path2, &pathlen2, &ino2, &freepath2, true); |
2f2dc053 SW |
3010 | if (ret < 0) { |
3011 | msg = ERR_PTR(ret); | |
3012 | goto out_free1; | |
3013 | } | |
3014 | ||
24865e75 JL |
3015 | req->r_altname = get_fscrypt_altname(req, &req->r_altname_len); |
3016 | if (IS_ERR(req->r_altname)) { | |
3017 | msg = ERR_CAST(req->r_altname); | |
3018 | req->r_altname = NULL; | |
3019 | goto out_free2; | |
3020 | } | |
3021 | ||
ce0d5bd3 XL |
3022 | /* |
3023 | * For old cephs without supporting the 32bit retry/fwd feature | |
3024 | * it will copy the raw memories directly when decoding the | |
3025 | * requests. While new cephs will decode the head depending the | |
3026 | * version member, so we need to make sure it will be compatible | |
3027 | * with them both. | |
3028 | */ | |
3029 | if (legacy) | |
3030 | len = sizeof(struct ceph_mds_request_head_legacy); | |
5ccd8530 | 3031 | else if (request_head_version == 1) |
ce0d5bd3 | 3032 | len = sizeof(struct ceph_mds_request_head_old); |
5ccd8530 CB |
3033 | else if (request_head_version == 2) |
3034 | len = offsetofend(struct ceph_mds_request_head, ext_num_fwd); | |
ce0d5bd3 XL |
3035 | else |
3036 | len = sizeof(struct ceph_mds_request_head); | |
2f2dc053 | 3037 | |
2d332d5b JL |
3038 | /* filepaths */ |
3039 | len += 2 * (1 + sizeof(u32) + sizeof(u64)); | |
3040 | len += pathlen1 + pathlen2; | |
3041 | ||
3042 | /* cap releases */ | |
2f2dc053 SW |
3043 | len += sizeof(struct ceph_mds_request_release) * |
3044 | (!!req->r_inode_drop + !!req->r_dentry_drop + | |
3045 | !!req->r_old_inode_drop + !!req->r_old_dentry_drop); | |
4f1ddb1e | 3046 | |
2f2dc053 | 3047 | if (req->r_dentry_drop) |
c1dfc277 | 3048 | len += pathlen1; |
2f2dc053 | 3049 | if (req->r_old_dentry_drop) |
c1dfc277 | 3050 | len += pathlen2; |
2f2dc053 | 3051 | |
2d332d5b JL |
3052 | /* MClientRequest tail */ |
3053 | ||
3054 | /* req->r_stamp */ | |
3055 | len += sizeof(struct ceph_timespec); | |
3056 | ||
3057 | /* gid list */ | |
3058 | len += sizeof(u32) + (sizeof(u64) * req->r_cred->group_info->ngroups); | |
3059 | ||
3060 | /* alternate name */ | |
24865e75 | 3061 | len += sizeof(u32) + req->r_altname_len; |
2d332d5b JL |
3062 | |
3063 | /* fscrypt_auth */ | |
3064 | len += sizeof(u32); // fscrypt_auth | |
3065 | if (req->r_fscrypt_auth) | |
3066 | len += ceph_fscrypt_auth_len(req->r_fscrypt_auth); | |
3067 | ||
3068 | /* fscrypt_file */ | |
3069 | len += sizeof(u32); | |
16be62fc JL |
3070 | if (test_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags)) |
3071 | len += sizeof(__le64); | |
2d332d5b | 3072 | |
0d9c1ab3 | 3073 | msg = ceph_msg_new2(CEPH_MSG_CLIENT_REQUEST, len, 1, GFP_NOFS, false); |
a79832f2 SW |
3074 | if (!msg) { |
3075 | msg = ERR_PTR(-ENOMEM); | |
2f2dc053 | 3076 | goto out_free2; |
a79832f2 | 3077 | } |
2f2dc053 | 3078 | |
6df058c0 SW |
3079 | msg->hdr.tid = cpu_to_le64(req->r_tid); |
3080 | ||
ce0d5bd3 XL |
3081 | lhead = find_legacy_request_head(msg->front.iov_base, |
3082 | session->s_con.peer_features); | |
3083 | ||
5ccd8530 CB |
3084 | if ((req->r_mnt_idmap != &nop_mnt_idmap) && |
3085 | !test_bit(CEPHFS_FEATURE_HAS_OWNER_UIDGID, &session->s_features)) { | |
3086 | WARN_ON_ONCE(!IS_CEPH_MDS_OP_NEWINODE(req->r_op)); | |
3087 | ||
673478b6 AM |
3088 | if (enable_unsafe_idmap) { |
3089 | pr_warn_once_client(cl, | |
3090 | "idmapped mount is used and CEPHFS_FEATURE_HAS_OWNER_UIDGID" | |
3091 | " is not supported by MDS. UID/GID-based restrictions may" | |
3092 | " not work properly.\n"); | |
5ccd8530 | 3093 | |
673478b6 AM |
3094 | caller_fsuid = from_vfsuid(req->r_mnt_idmap, &init_user_ns, |
3095 | VFSUIDT_INIT(req->r_cred->fsuid)); | |
3096 | caller_fsgid = from_vfsgid(req->r_mnt_idmap, &init_user_ns, | |
3097 | VFSGIDT_INIT(req->r_cred->fsgid)); | |
3098 | } else { | |
3099 | pr_err_ratelimited_client(cl, | |
3100 | "idmapped mount is used and CEPHFS_FEATURE_HAS_OWNER_UIDGID" | |
3101 | " is not supported by MDS. Fail request with -EIO.\n"); | |
3102 | ||
3103 | ret = -EIO; | |
3104 | goto out_err; | |
3105 | } | |
5ccd8530 CB |
3106 | } |
3107 | ||
4f1ddb1e | 3108 | /* |
ce0d5bd3 | 3109 | * The ceph_mds_request_head_legacy didn't contain a version field, and |
4f1ddb1e JL |
3110 | * one was added when we moved the message version from 3->4. |
3111 | */ | |
3112 | if (legacy) { | |
3113 | msg->hdr.version = cpu_to_le16(3); | |
ce0d5bd3 | 3114 | p = msg->front.iov_base + sizeof(*lhead); |
5ccd8530 | 3115 | } else if (request_head_version == 1) { |
ce0d5bd3 XL |
3116 | struct ceph_mds_request_head_old *ohead = msg->front.iov_base; |
3117 | ||
3118 | msg->hdr.version = cpu_to_le16(4); | |
3119 | ohead->version = cpu_to_le16(1); | |
3120 | p = msg->front.iov_base + sizeof(*ohead); | |
5ccd8530 CB |
3121 | } else if (request_head_version == 2) { |
3122 | struct ceph_mds_request_head *nhead = msg->front.iov_base; | |
3123 | ||
3124 | msg->hdr.version = cpu_to_le16(6); | |
3125 | nhead->version = cpu_to_le16(2); | |
3126 | ||
3127 | p = msg->front.iov_base + offsetofend(struct ceph_mds_request_head, ext_num_fwd); | |
4f1ddb1e | 3128 | } else { |
ce0d5bd3 | 3129 | struct ceph_mds_request_head *nhead = msg->front.iov_base; |
5ccd8530 CB |
3130 | kuid_t owner_fsuid; |
3131 | kgid_t owner_fsgid; | |
4f1ddb1e | 3132 | |
2d332d5b | 3133 | msg->hdr.version = cpu_to_le16(6); |
ce0d5bd3 | 3134 | nhead->version = cpu_to_le16(CEPH_MDS_REQUEST_HEAD_VERSION); |
5ccd8530 CB |
3135 | nhead->struct_len = cpu_to_le32(sizeof(struct ceph_mds_request_head)); |
3136 | ||
3137 | if (IS_CEPH_MDS_OP_NEWINODE(req->r_op)) { | |
3138 | owner_fsuid = from_vfsuid(req->r_mnt_idmap, &init_user_ns, | |
3139 | VFSUIDT_INIT(req->r_cred->fsuid)); | |
3140 | owner_fsgid = from_vfsgid(req->r_mnt_idmap, &init_user_ns, | |
3141 | VFSGIDT_INIT(req->r_cred->fsgid)); | |
3142 | nhead->owner_uid = cpu_to_le32(from_kuid(&init_user_ns, owner_fsuid)); | |
3143 | nhead->owner_gid = cpu_to_le32(from_kgid(&init_user_ns, owner_fsgid)); | |
3144 | } else { | |
3145 | nhead->owner_uid = cpu_to_le32(-1); | |
3146 | nhead->owner_gid = cpu_to_le32(-1); | |
3147 | } | |
3148 | ||
ce0d5bd3 | 3149 | p = msg->front.iov_base + sizeof(*nhead); |
4f1ddb1e JL |
3150 | } |
3151 | ||
2f2dc053 SW |
3152 | end = msg->front.iov_base + msg->front.iov_len; |
3153 | ||
ce0d5bd3 XL |
3154 | lhead->mdsmap_epoch = cpu_to_le32(mdsc->mdsmap->m_epoch); |
3155 | lhead->op = cpu_to_le32(req->r_op); | |
3156 | lhead->caller_uid = cpu_to_le32(from_kuid(&init_user_ns, | |
673478b6 | 3157 | caller_fsuid)); |
ce0d5bd3 | 3158 | lhead->caller_gid = cpu_to_le32(from_kgid(&init_user_ns, |
673478b6 | 3159 | caller_fsgid)); |
ce0d5bd3 XL |
3160 | lhead->ino = cpu_to_le64(req->r_deleg_ino); |
3161 | lhead->args = req->r_args; | |
2f2dc053 SW |
3162 | |
3163 | ceph_encode_filepath(&p, end, ino1, path1); | |
3164 | ceph_encode_filepath(&p, end, ino2, path2); | |
3165 | ||
e979cf50 SW |
3166 | /* make note of release offset, in case we need to replay */ |
3167 | req->r_request_release_offset = p - msg->front.iov_base; | |
3168 | ||
2f2dc053 SW |
3169 | /* cap releases */ |
3170 | releases = 0; | |
3171 | if (req->r_inode_drop) | |
3172 | releases += ceph_encode_inode_release(&p, | |
2b0143b5 | 3173 | req->r_inode ? req->r_inode : d_inode(req->r_dentry), |
719a2514 YZ |
3174 | mds, req->r_inode_drop, req->r_inode_unless, |
3175 | req->r_op == CEPH_MDS_OP_READDIR); | |
3fd945a7 JL |
3176 | if (req->r_dentry_drop) { |
3177 | ret = ceph_encode_dentry_release(&p, req->r_dentry, | |
3dd69aab | 3178 | req->r_parent, mds, req->r_dentry_drop, |
ca6c8ae0 | 3179 | req->r_dentry_unless); |
3fd945a7 JL |
3180 | if (ret < 0) |
3181 | goto out_err; | |
3182 | releases += ret; | |
3183 | } | |
3184 | if (req->r_old_dentry_drop) { | |
3185 | ret = ceph_encode_dentry_release(&p, req->r_old_dentry, | |
ca6c8ae0 JL |
3186 | req->r_old_dentry_dir, mds, |
3187 | req->r_old_dentry_drop, | |
3188 | req->r_old_dentry_unless); | |
3fd945a7 JL |
3189 | if (ret < 0) |
3190 | goto out_err; | |
3191 | releases += ret; | |
3192 | } | |
2f2dc053 SW |
3193 | if (req->r_old_inode_drop) |
3194 | releases += ceph_encode_inode_release(&p, | |
2b0143b5 | 3195 | d_inode(req->r_old_dentry), |
2f2dc053 | 3196 | mds, req->r_old_inode_drop, req->r_old_inode_unless, 0); |
6e6f0923 YZ |
3197 | |
3198 | if (drop_cap_releases) { | |
3199 | releases = 0; | |
3200 | p = msg->front.iov_base + req->r_request_release_offset; | |
3201 | } | |
3202 | ||
ce0d5bd3 | 3203 | lhead->num_releases = cpu_to_le16(releases); |
2f2dc053 | 3204 | |
2d332d5b | 3205 | encode_mclientrequest_tail(&p, req); |
4f1ddb1e | 3206 | |
b682c6d4 XL |
3207 | if (WARN_ON_ONCE(p > end)) { |
3208 | ceph_msg_put(msg); | |
3209 | msg = ERR_PTR(-ERANGE); | |
3210 | goto out_free2; | |
3211 | } | |
3212 | ||
2f2dc053 SW |
3213 | msg->front.iov_len = p - msg->front.iov_base; |
3214 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
3215 | ||
25e6bae3 YZ |
3216 | if (req->r_pagelist) { |
3217 | struct ceph_pagelist *pagelist = req->r_pagelist; | |
25e6bae3 YZ |
3218 | ceph_msg_data_add_pagelist(msg, pagelist); |
3219 | msg->hdr.data_len = cpu_to_le32(pagelist->length); | |
3220 | } else { | |
3221 | msg->hdr.data_len = 0; | |
ebf18f47 | 3222 | } |
02afca6c | 3223 | |
2f2dc053 SW |
3224 | msg->hdr.data_off = cpu_to_le16(0); |
3225 | ||
3226 | out_free2: | |
3227 | if (freepath2) | |
f77f21bb | 3228 | ceph_mdsc_free_path((char *)path2, pathlen2); |
2f2dc053 SW |
3229 | out_free1: |
3230 | if (freepath1) | |
f77f21bb | 3231 | ceph_mdsc_free_path((char *)path1, pathlen1); |
2f2dc053 SW |
3232 | out: |
3233 | return msg; | |
3fd945a7 JL |
3234 | out_err: |
3235 | ceph_msg_put(msg); | |
3236 | msg = ERR_PTR(ret); | |
3237 | goto out_free2; | |
2f2dc053 SW |
3238 | } |
3239 | ||
3240 | /* | |
3241 | * called under mdsc->mutex if error, under no mutex if | |
3242 | * success. | |
3243 | */ | |
3244 | static void complete_request(struct ceph_mds_client *mdsc, | |
3245 | struct ceph_mds_request *req) | |
3246 | { | |
70c94820 XL |
3247 | req->r_end_latency = ktime_get(); |
3248 | ||
2f2dc053 SW |
3249 | if (req->r_callback) |
3250 | req->r_callback(mdsc, req); | |
111c7081 | 3251 | complete_all(&req->r_completion); |
2f2dc053 SW |
3252 | } |
3253 | ||
3254 | /* | |
3255 | * called under mdsc->mutex | |
3256 | */ | |
396bd62c | 3257 | static int __prepare_send_request(struct ceph_mds_session *session, |
2f2dc053 | 3258 | struct ceph_mds_request *req, |
396bd62c | 3259 | bool drop_cap_releases) |
2f2dc053 | 3260 | { |
396bd62c JL |
3261 | int mds = session->s_mds; |
3262 | struct ceph_mds_client *mdsc = session->s_mdsc; | |
38d46409 | 3263 | struct ceph_client *cl = mdsc->fsc->client; |
ce0d5bd3 XL |
3264 | struct ceph_mds_request_head_legacy *lhead; |
3265 | struct ceph_mds_request_head *nhead; | |
2f2dc053 | 3266 | struct ceph_msg *msg; |
ce0d5bd3 XL |
3267 | int flags = 0, old_max_retry; |
3268 | bool old_version = !test_bit(CEPHFS_FEATURE_32BITS_RETRY_FWD, | |
3269 | &session->s_features); | |
546a5d61 XL |
3270 | |
3271 | /* | |
ce0d5bd3 XL |
3272 | * Avoid inifinite retrying after overflow. The client will |
3273 | * increase the retry count and if the MDS is old version, | |
3274 | * so we limit to retry at most 256 times. | |
546a5d61 | 3275 | */ |
ce0d5bd3 XL |
3276 | if (req->r_attempts) { |
3277 | old_max_retry = sizeof_field(struct ceph_mds_request_head_old, | |
3278 | num_retry); | |
3279 | old_max_retry = 1 << (old_max_retry * BITS_PER_BYTE); | |
3280 | if ((old_version && req->r_attempts >= old_max_retry) || | |
3281 | ((uint32_t)req->r_attempts >= U32_MAX)) { | |
38d46409 XL |
3282 | pr_warn_ratelimited_client(cl, "request tid %llu seq overflow\n", |
3283 | req->r_tid); | |
ce0d5bd3 XL |
3284 | return -EMULTIHOP; |
3285 | } | |
546a5d61 | 3286 | } |
2f2dc053 | 3287 | |
2f2dc053 | 3288 | req->r_attempts++; |
e55b71f8 GF |
3289 | if (req->r_inode) { |
3290 | struct ceph_cap *cap = | |
3291 | ceph_get_cap_for_mds(ceph_inode(req->r_inode), mds); | |
3292 | ||
3293 | if (cap) | |
3294 | req->r_sent_on_mseq = cap->mseq; | |
3295 | else | |
3296 | req->r_sent_on_mseq = -1; | |
3297 | } | |
38d46409 XL |
3298 | doutc(cl, "%p tid %lld %s (attempt %d)\n", req, req->r_tid, |
3299 | ceph_mds_op_name(req->r_op), req->r_attempts); | |
2f2dc053 | 3300 | |
bc2de10d | 3301 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { |
c5c9a0bf | 3302 | void *p; |
4f1ddb1e | 3303 | |
01a92f17 SW |
3304 | /* |
3305 | * Replay. Do not regenerate message (and rebuild | |
3306 | * paths, etc.); just use the original message. | |
3307 | * Rebuilding paths will break for renames because | |
3308 | * d_move mangles the src name. | |
3309 | */ | |
3310 | msg = req->r_request; | |
ce0d5bd3 XL |
3311 | lhead = find_legacy_request_head(msg->front.iov_base, |
3312 | session->s_con.peer_features); | |
01a92f17 | 3313 | |
ce0d5bd3 | 3314 | flags = le32_to_cpu(lhead->flags); |
01a92f17 | 3315 | flags |= CEPH_MDS_FLAG_REPLAY; |
ce0d5bd3 | 3316 | lhead->flags = cpu_to_le32(flags); |
01a92f17 SW |
3317 | |
3318 | if (req->r_target_inode) | |
ce0d5bd3 | 3319 | lhead->ino = cpu_to_le64(ceph_ino(req->r_target_inode)); |
01a92f17 | 3320 | |
ce0d5bd3 XL |
3321 | lhead->num_retry = req->r_attempts - 1; |
3322 | if (!old_version) { | |
3323 | nhead = (struct ceph_mds_request_head*)msg->front.iov_base; | |
3324 | nhead->ext_num_retry = cpu_to_le32(req->r_attempts - 1); | |
3325 | } | |
e979cf50 SW |
3326 | |
3327 | /* remove cap/dentry releases from message */ | |
ce0d5bd3 | 3328 | lhead->num_releases = 0; |
c5c9a0bf | 3329 | |
c5c9a0bf | 3330 | p = msg->front.iov_base + req->r_request_release_offset; |
2d332d5b | 3331 | encode_mclientrequest_tail(&p, req); |
c5c9a0bf YZ |
3332 | |
3333 | msg->front.iov_len = p - msg->front.iov_base; | |
3334 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
01a92f17 SW |
3335 | return 0; |
3336 | } | |
3337 | ||
2f2dc053 SW |
3338 | if (req->r_request) { |
3339 | ceph_msg_put(req->r_request); | |
3340 | req->r_request = NULL; | |
3341 | } | |
4f1ddb1e | 3342 | msg = create_request_message(session, req, drop_cap_releases); |
2f2dc053 | 3343 | if (IS_ERR(msg)) { |
e1518c7c | 3344 | req->r_err = PTR_ERR(msg); |
a79832f2 | 3345 | return PTR_ERR(msg); |
2f2dc053 SW |
3346 | } |
3347 | req->r_request = msg; | |
3348 | ||
ce0d5bd3 XL |
3349 | lhead = find_legacy_request_head(msg->front.iov_base, |
3350 | session->s_con.peer_features); | |
3351 | lhead->oldest_client_tid = cpu_to_le64(__get_oldest_tid(mdsc)); | |
bc2de10d | 3352 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) |
2f2dc053 | 3353 | flags |= CEPH_MDS_FLAG_REPLAY; |
3bb48b41 JL |
3354 | if (test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags)) |
3355 | flags |= CEPH_MDS_FLAG_ASYNC; | |
3dd69aab | 3356 | if (req->r_parent) |
2f2dc053 | 3357 | flags |= CEPH_MDS_FLAG_WANT_DENTRY; |
ce0d5bd3 XL |
3358 | lhead->flags = cpu_to_le32(flags); |
3359 | lhead->num_fwd = req->r_num_fwd; | |
3360 | lhead->num_retry = req->r_attempts - 1; | |
3361 | if (!old_version) { | |
3362 | nhead = (struct ceph_mds_request_head*)msg->front.iov_base; | |
3363 | nhead->ext_num_fwd = cpu_to_le32(req->r_num_fwd); | |
3364 | nhead->ext_num_retry = cpu_to_le32(req->r_attempts - 1); | |
3365 | } | |
2f2dc053 | 3366 | |
38d46409 | 3367 | doutc(cl, " r_parent = %p\n", req->r_parent); |
2f2dc053 SW |
3368 | return 0; |
3369 | } | |
3370 | ||
9cf54563 XL |
3371 | /* |
3372 | * called under mdsc->mutex | |
3373 | */ | |
396bd62c | 3374 | static int __send_request(struct ceph_mds_session *session, |
9cf54563 XL |
3375 | struct ceph_mds_request *req, |
3376 | bool drop_cap_releases) | |
3377 | { | |
3378 | int err; | |
3379 | ||
396bd62c | 3380 | err = __prepare_send_request(session, req, drop_cap_releases); |
9cf54563 XL |
3381 | if (!err) { |
3382 | ceph_msg_get(req->r_request); | |
3383 | ceph_con_send(&session->s_con, req->r_request); | |
3384 | } | |
3385 | ||
3386 | return err; | |
3387 | } | |
3388 | ||
2f2dc053 SW |
3389 | /* |
3390 | * send request, or put it on the appropriate wait list. | |
3391 | */ | |
d5548492 | 3392 | static void __do_request(struct ceph_mds_client *mdsc, |
2f2dc053 SW |
3393 | struct ceph_mds_request *req) |
3394 | { | |
38d46409 | 3395 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
3396 | struct ceph_mds_session *session = NULL; |
3397 | int mds = -1; | |
48fec5d0 | 3398 | int err = 0; |
c4853e97 | 3399 | bool random; |
2f2dc053 | 3400 | |
bc2de10d JL |
3401 | if (req->r_err || test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)) { |
3402 | if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) | |
eb1b8af3 | 3403 | __unregister_request(mdsc, req); |
d5548492 | 3404 | return; |
eb1b8af3 | 3405 | } |
2f2dc053 | 3406 | |
a68e564a | 3407 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_FENCE_IO) { |
38d46409 | 3408 | doutc(cl, "metadata corrupted\n"); |
a68e564a XL |
3409 | err = -EIO; |
3410 | goto finish; | |
3411 | } | |
2f2dc053 SW |
3412 | if (req->r_timeout && |
3413 | time_after_eq(jiffies, req->r_started + req->r_timeout)) { | |
38d46409 | 3414 | doutc(cl, "timed out\n"); |
8ccf7fcc | 3415 | err = -ETIMEDOUT; |
2f2dc053 SW |
3416 | goto finish; |
3417 | } | |
52953d55 | 3418 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) { |
38d46409 | 3419 | doutc(cl, "forced umount\n"); |
48fec5d0 YZ |
3420 | err = -EIO; |
3421 | goto finish; | |
3422 | } | |
52953d55 | 3423 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_MOUNTING) { |
e9e427f0 YZ |
3424 | if (mdsc->mdsmap_err) { |
3425 | err = mdsc->mdsmap_err; | |
38d46409 | 3426 | doutc(cl, "mdsmap err %d\n", err); |
e9e427f0 YZ |
3427 | goto finish; |
3428 | } | |
cc8e8342 | 3429 | if (mdsc->mdsmap->m_epoch == 0) { |
38d46409 | 3430 | doutc(cl, "no mdsmap, waiting for map\n"); |
cc8e8342 | 3431 | list_add(&req->r_wait, &mdsc->waiting_for_map); |
d5548492 | 3432 | return; |
cc8e8342 | 3433 | } |
e9e427f0 YZ |
3434 | if (!(mdsc->fsc->mount_options->flags & |
3435 | CEPH_MOUNT_OPT_MOUNTWAIT) && | |
3436 | !ceph_mdsmap_is_cluster_available(mdsc->mdsmap)) { | |
97820058 | 3437 | err = -EHOSTUNREACH; |
e9e427f0 YZ |
3438 | goto finish; |
3439 | } | |
3440 | } | |
2f2dc053 | 3441 | |
dc69e2e9 SW |
3442 | put_request_session(req); |
3443 | ||
c4853e97 | 3444 | mds = __choose_mds(mdsc, req, &random); |
2f2dc053 SW |
3445 | if (mds < 0 || |
3446 | ceph_mdsmap_get_state(mdsc->mdsmap, mds) < CEPH_MDS_STATE_ACTIVE) { | |
3bb48b41 JL |
3447 | if (test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags)) { |
3448 | err = -EJUKEBOX; | |
3449 | goto finish; | |
3450 | } | |
38d46409 | 3451 | doutc(cl, "no mds or not active, waiting for map\n"); |
2f2dc053 | 3452 | list_add(&req->r_wait, &mdsc->waiting_for_map); |
d5548492 | 3453 | return; |
2f2dc053 SW |
3454 | } |
3455 | ||
3456 | /* get, open session */ | |
3457 | session = __ceph_lookup_mds_session(mdsc, mds); | |
9c423956 | 3458 | if (!session) { |
2f2dc053 | 3459 | session = register_session(mdsc, mds); |
9c423956 SW |
3460 | if (IS_ERR(session)) { |
3461 | err = PTR_ERR(session); | |
3462 | goto finish; | |
3463 | } | |
3464 | } | |
5b3248c6 | 3465 | req->r_session = ceph_get_mds_session(session); |
dc69e2e9 | 3466 | |
38d46409 XL |
3467 | doutc(cl, "mds%d session %p state %s\n", mds, session, |
3468 | ceph_session_state_name(session->s_state)); | |
6eb06c46 XL |
3469 | |
3470 | /* | |
3471 | * The old ceph will crash the MDSs when see unknown OPs | |
3472 | */ | |
3473 | if (req->r_feature_needed > 0 && | |
3474 | !test_bit(req->r_feature_needed, &session->s_features)) { | |
3475 | err = -EOPNOTSUPP; | |
3476 | goto out_session; | |
3477 | } | |
3478 | ||
2f2dc053 SW |
3479 | if (session->s_state != CEPH_MDS_SESSION_OPEN && |
3480 | session->s_state != CEPH_MDS_SESSION_HUNG) { | |
3bb48b41 JL |
3481 | /* |
3482 | * We cannot queue async requests since the caps and delegated | |
3483 | * inodes are bound to the session. Just return -EJUKEBOX and | |
3484 | * let the caller retry a sync request in that case. | |
3485 | */ | |
3486 | if (test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags)) { | |
3487 | err = -EJUKEBOX; | |
3488 | goto out_session; | |
3489 | } | |
4ae3713f JL |
3490 | |
3491 | /* | |
3492 | * If the session has been REJECTED, then return a hard error, | |
3493 | * unless it's a CLEANRECOVER mount, in which case we'll queue | |
3494 | * it to the mdsc queue. | |
3495 | */ | |
3496 | if (session->s_state == CEPH_MDS_SESSION_REJECTED) { | |
3497 | if (ceph_test_mount_opt(mdsc->fsc, CLEANRECOVER)) | |
3498 | list_add(&req->r_wait, &mdsc->waiting_for_map); | |
3499 | else | |
3500 | err = -EACCES; | |
3501 | goto out_session; | |
3502 | } | |
3503 | ||
2f2dc053 | 3504 | if (session->s_state == CEPH_MDS_SESSION_NEW || |
c4853e97 | 3505 | session->s_state == CEPH_MDS_SESSION_CLOSING) { |
b682c6d4 XL |
3506 | err = __open_session(mdsc, session); |
3507 | if (err) | |
3508 | goto out_session; | |
c4853e97 XL |
3509 | /* retry the same mds later */ |
3510 | if (random) | |
3511 | req->r_resend_mds = mds; | |
3512 | } | |
2f2dc053 SW |
3513 | list_add(&req->r_wait, &session->s_waiting); |
3514 | goto out_session; | |
3515 | } | |
3516 | ||
3517 | /* send request */ | |
2f2dc053 SW |
3518 | req->r_resend_mds = -1; /* forget any previous mds hint */ |
3519 | ||
3520 | if (req->r_request_started == 0) /* note request start time */ | |
3521 | req->r_request_started = jiffies; | |
3522 | ||
00061645 XL |
3523 | /* |
3524 | * For async create we will choose the auth MDS of frag in parent | |
3525 | * directory to send the request and ususally this works fine, but | |
3526 | * if the migrated the dirtory to another MDS before it could handle | |
3527 | * it the request will be forwarded. | |
3528 | * | |
3529 | * And then the auth cap will be changed. | |
3530 | */ | |
3531 | if (test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) && req->r_num_fwd) { | |
3532 | struct ceph_dentry_info *di = ceph_dentry(req->r_dentry); | |
3533 | struct ceph_inode_info *ci; | |
3534 | struct ceph_cap *cap; | |
3535 | ||
3536 | /* | |
3537 | * The request maybe handled very fast and the new inode | |
3538 | * hasn't been linked to the dentry yet. We need to wait | |
3539 | * for the ceph_finish_async_create(), which shouldn't be | |
3540 | * stuck too long or fail in thoery, to finish when forwarding | |
3541 | * the request. | |
3542 | */ | |
3543 | if (!d_inode(req->r_dentry)) { | |
3544 | err = wait_on_bit(&di->flags, CEPH_DENTRY_ASYNC_CREATE_BIT, | |
3545 | TASK_KILLABLE); | |
3546 | if (err) { | |
3547 | mutex_lock(&req->r_fill_mutex); | |
3548 | set_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags); | |
3549 | mutex_unlock(&req->r_fill_mutex); | |
3550 | goto out_session; | |
3551 | } | |
3552 | } | |
3553 | ||
3554 | ci = ceph_inode(d_inode(req->r_dentry)); | |
3555 | ||
3556 | spin_lock(&ci->i_ceph_lock); | |
3557 | cap = ci->i_auth_cap; | |
3558 | if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE && mds != cap->mds) { | |
38d46409 XL |
3559 | doutc(cl, "session changed for auth cap %d -> %d\n", |
3560 | cap->session->s_mds, session->s_mds); | |
00061645 XL |
3561 | |
3562 | /* Remove the auth cap from old session */ | |
3563 | spin_lock(&cap->session->s_cap_lock); | |
3564 | cap->session->s_nr_caps--; | |
3565 | list_del_init(&cap->session_caps); | |
3566 | spin_unlock(&cap->session->s_cap_lock); | |
3567 | ||
3568 | /* Add the auth cap to the new session */ | |
3569 | cap->mds = mds; | |
3570 | cap->session = session; | |
3571 | spin_lock(&session->s_cap_lock); | |
3572 | session->s_nr_caps++; | |
3573 | list_add_tail(&cap->session_caps, &session->s_caps); | |
3574 | spin_unlock(&session->s_cap_lock); | |
3575 | ||
3576 | change_auth_cap_ses(ci, session); | |
3577 | } | |
3578 | spin_unlock(&ci->i_ceph_lock); | |
3579 | } | |
3580 | ||
396bd62c | 3581 | err = __send_request(session, req, false); |
2f2dc053 SW |
3582 | |
3583 | out_session: | |
3584 | ceph_put_mds_session(session); | |
48fec5d0 YZ |
3585 | finish: |
3586 | if (err) { | |
38d46409 | 3587 | doutc(cl, "early error %d\n", err); |
48fec5d0 YZ |
3588 | req->r_err = err; |
3589 | complete_request(mdsc, req); | |
3590 | __unregister_request(mdsc, req); | |
3591 | } | |
d5548492 | 3592 | return; |
2f2dc053 SW |
3593 | } |
3594 | ||
3595 | /* | |
3596 | * called under mdsc->mutex | |
3597 | */ | |
3598 | static void __wake_requests(struct ceph_mds_client *mdsc, | |
3599 | struct list_head *head) | |
3600 | { | |
38d46409 | 3601 | struct ceph_client *cl = mdsc->fsc->client; |
ed75ec2c YZ |
3602 | struct ceph_mds_request *req; |
3603 | LIST_HEAD(tmp_list); | |
3604 | ||
3605 | list_splice_init(head, &tmp_list); | |
2f2dc053 | 3606 | |
ed75ec2c YZ |
3607 | while (!list_empty(&tmp_list)) { |
3608 | req = list_entry(tmp_list.next, | |
3609 | struct ceph_mds_request, r_wait); | |
2f2dc053 | 3610 | list_del_init(&req->r_wait); |
38d46409 XL |
3611 | doutc(cl, " wake request %p tid %llu\n", req, |
3612 | req->r_tid); | |
2f2dc053 SW |
3613 | __do_request(mdsc, req); |
3614 | } | |
3615 | } | |
3616 | ||
3617 | /* | |
3618 | * Wake up threads with requests pending for @mds, so that they can | |
29790f26 | 3619 | * resubmit their requests to a possibly different mds. |
2f2dc053 | 3620 | */ |
29790f26 | 3621 | static void kick_requests(struct ceph_mds_client *mdsc, int mds) |
2f2dc053 | 3622 | { |
38d46409 | 3623 | struct ceph_client *cl = mdsc->fsc->client; |
44ca18f2 | 3624 | struct ceph_mds_request *req; |
282c1052 | 3625 | struct rb_node *p = rb_first(&mdsc->request_tree); |
2f2dc053 | 3626 | |
38d46409 | 3627 | doutc(cl, "kick_requests mds%d\n", mds); |
282c1052 | 3628 | while (p) { |
44ca18f2 | 3629 | req = rb_entry(p, struct ceph_mds_request, r_node); |
282c1052 | 3630 | p = rb_next(p); |
bc2de10d | 3631 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) |
44ca18f2 | 3632 | continue; |
3de22be6 YZ |
3633 | if (req->r_attempts > 0) |
3634 | continue; /* only new requests */ | |
44ca18f2 SW |
3635 | if (req->r_session && |
3636 | req->r_session->s_mds == mds) { | |
38d46409 | 3637 | doutc(cl, " kicking tid %llu\n", req->r_tid); |
03974e81 | 3638 | list_del_init(&req->r_wait); |
44ca18f2 | 3639 | __do_request(mdsc, req); |
2f2dc053 SW |
3640 | } |
3641 | } | |
3642 | } | |
3643 | ||
86bda539 | 3644 | int ceph_mdsc_submit_request(struct ceph_mds_client *mdsc, struct inode *dir, |
2f2dc053 SW |
3645 | struct ceph_mds_request *req) |
3646 | { | |
38d46409 | 3647 | struct ceph_client *cl = mdsc->fsc->client; |
891f3f5a | 3648 | int err = 0; |
86bda539 JL |
3649 | |
3650 | /* take CAP_PIN refs for r_inode, r_parent, r_old_dentry */ | |
3651 | if (req->r_inode) | |
3652 | ceph_get_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN); | |
9c1c2b35 | 3653 | if (req->r_parent) { |
719a2514 YZ |
3654 | struct ceph_inode_info *ci = ceph_inode(req->r_parent); |
3655 | int fmode = (req->r_op & CEPH_MDS_OP_WRITE) ? | |
3656 | CEPH_FILE_MODE_WR : CEPH_FILE_MODE_RD; | |
3657 | spin_lock(&ci->i_ceph_lock); | |
3658 | ceph_take_cap_refs(ci, CEPH_CAP_PIN, false); | |
3659 | __ceph_touch_fmode(ci, mdsc, fmode); | |
3660 | spin_unlock(&ci->i_ceph_lock); | |
9c1c2b35 | 3661 | } |
86bda539 JL |
3662 | if (req->r_old_dentry_dir) |
3663 | ceph_get_cap_refs(ceph_inode(req->r_old_dentry_dir), | |
3664 | CEPH_CAP_PIN); | |
3665 | ||
891f3f5a JL |
3666 | if (req->r_inode) { |
3667 | err = ceph_wait_on_async_create(req->r_inode); | |
3668 | if (err) { | |
38d46409 | 3669 | doutc(cl, "wait for async create returned: %d\n", err); |
891f3f5a JL |
3670 | return err; |
3671 | } | |
3672 | } | |
3673 | ||
3674 | if (!err && req->r_old_inode) { | |
3675 | err = ceph_wait_on_async_create(req->r_old_inode); | |
3676 | if (err) { | |
38d46409 | 3677 | doutc(cl, "wait for async create returned: %d\n", err); |
891f3f5a JL |
3678 | return err; |
3679 | } | |
3680 | } | |
3681 | ||
38d46409 | 3682 | doutc(cl, "submit_request on %p for inode %p\n", req, dir); |
2f2dc053 | 3683 | mutex_lock(&mdsc->mutex); |
86bda539 | 3684 | __register_request(mdsc, req, dir); |
2f2dc053 | 3685 | __do_request(mdsc, req); |
86bda539 | 3686 | err = req->r_err; |
2f2dc053 | 3687 | mutex_unlock(&mdsc->mutex); |
86bda539 | 3688 | return err; |
2f2dc053 SW |
3689 | } |
3690 | ||
9eaa7b79 JL |
3691 | int ceph_mdsc_wait_request(struct ceph_mds_client *mdsc, |
3692 | struct ceph_mds_request *req, | |
3693 | ceph_mds_request_wait_callback_t wait_func) | |
2f2dc053 | 3694 | { |
38d46409 | 3695 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
3696 | int err; |
3697 | ||
e1518c7c | 3698 | /* wait */ |
38d46409 | 3699 | doutc(cl, "do_request waiting\n"); |
9eaa7b79 JL |
3700 | if (wait_func) { |
3701 | err = wait_func(mdsc, req); | |
e1518c7c | 3702 | } else { |
5be73034 ID |
3703 | long timeleft = wait_for_completion_killable_timeout( |
3704 | &req->r_completion, | |
3705 | ceph_timeout_jiffies(req->r_timeout)); | |
3706 | if (timeleft > 0) | |
3707 | err = 0; | |
3708 | else if (!timeleft) | |
8ccf7fcc | 3709 | err = -ETIMEDOUT; /* timed out */ |
5be73034 ID |
3710 | else |
3711 | err = timeleft; /* killed */ | |
e1518c7c | 3712 | } |
38d46409 | 3713 | doutc(cl, "do_request waited, got %d\n", err); |
e1518c7c | 3714 | mutex_lock(&mdsc->mutex); |
5b1daecd | 3715 | |
e1518c7c | 3716 | /* only abort if we didn't race with a real reply */ |
bc2de10d | 3717 | if (test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)) { |
e1518c7c SW |
3718 | err = le32_to_cpu(req->r_reply_info.head->result); |
3719 | } else if (err < 0) { | |
38d46409 | 3720 | doutc(cl, "aborted request %lld with %d\n", req->r_tid, err); |
b4556396 SW |
3721 | |
3722 | /* | |
3723 | * ensure we aren't running concurrently with | |
3724 | * ceph_fill_trace or ceph_readdir_prepopulate, which | |
3725 | * rely on locks (dir mutex) held by our caller. | |
3726 | */ | |
3727 | mutex_lock(&req->r_fill_mutex); | |
e1518c7c | 3728 | req->r_err = err; |
bc2de10d | 3729 | set_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags); |
b4556396 | 3730 | mutex_unlock(&req->r_fill_mutex); |
5b1daecd | 3731 | |
3dd69aab | 3732 | if (req->r_parent && |
167c9e35 SW |
3733 | (req->r_op & CEPH_MDS_OP_WRITE)) |
3734 | ceph_invalidate_dir_request(req); | |
2f2dc053 | 3735 | } else { |
e1518c7c | 3736 | err = req->r_err; |
2f2dc053 | 3737 | } |
2f2dc053 | 3738 | |
e1518c7c | 3739 | mutex_unlock(&mdsc->mutex); |
8340f22c JL |
3740 | return err; |
3741 | } | |
3742 | ||
3743 | /* | |
3744 | * Synchrously perform an mds request. Take care of all of the | |
3745 | * session setup, forwarding, retry details. | |
3746 | */ | |
3747 | int ceph_mdsc_do_request(struct ceph_mds_client *mdsc, | |
3748 | struct inode *dir, | |
3749 | struct ceph_mds_request *req) | |
3750 | { | |
38d46409 | 3751 | struct ceph_client *cl = mdsc->fsc->client; |
8340f22c JL |
3752 | int err; |
3753 | ||
38d46409 | 3754 | doutc(cl, "do_request on %p\n", req); |
8340f22c JL |
3755 | |
3756 | /* issue */ | |
3757 | err = ceph_mdsc_submit_request(mdsc, dir, req); | |
3758 | if (!err) | |
9eaa7b79 | 3759 | err = ceph_mdsc_wait_request(mdsc, req, NULL); |
38d46409 | 3760 | doutc(cl, "do_request %p done, result %d\n", req, err); |
2f2dc053 SW |
3761 | return err; |
3762 | } | |
3763 | ||
167c9e35 | 3764 | /* |
2f276c51 | 3765 | * Invalidate dir's completeness, dentry lease state on an aborted MDS |
167c9e35 SW |
3766 | * namespace request. |
3767 | */ | |
3768 | void ceph_invalidate_dir_request(struct ceph_mds_request *req) | |
3769 | { | |
8d8f371c YZ |
3770 | struct inode *dir = req->r_parent; |
3771 | struct inode *old_dir = req->r_old_dentry_dir; | |
38d46409 | 3772 | struct ceph_client *cl = req->r_mdsc->fsc->client; |
167c9e35 | 3773 | |
38d46409 XL |
3774 | doutc(cl, "invalidate_dir_request %p %p (complete, lease(s))\n", |
3775 | dir, old_dir); | |
167c9e35 | 3776 | |
8d8f371c YZ |
3777 | ceph_dir_clear_complete(dir); |
3778 | if (old_dir) | |
3779 | ceph_dir_clear_complete(old_dir); | |
167c9e35 SW |
3780 | if (req->r_dentry) |
3781 | ceph_invalidate_dentry_lease(req->r_dentry); | |
3782 | if (req->r_old_dentry) | |
3783 | ceph_invalidate_dentry_lease(req->r_old_dentry); | |
3784 | } | |
3785 | ||
2f2dc053 SW |
3786 | /* |
3787 | * Handle mds reply. | |
3788 | * | |
3789 | * We take the session mutex and parse and process the reply immediately. | |
3790 | * This preserves the logical ordering of replies, capabilities, etc., sent | |
3791 | * by the MDS as they are applied to our local cache. | |
3792 | */ | |
3793 | static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg) | |
3794 | { | |
3795 | struct ceph_mds_client *mdsc = session->s_mdsc; | |
38d46409 | 3796 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
3797 | struct ceph_mds_request *req; |
3798 | struct ceph_mds_reply_head *head = msg->front.iov_base; | |
3799 | struct ceph_mds_reply_info_parsed *rinfo; /* parsed reply info */ | |
982d6011 | 3800 | struct ceph_snap_realm *realm; |
2f2dc053 SW |
3801 | u64 tid; |
3802 | int err, result; | |
2600d2dd | 3803 | int mds = session->s_mds; |
a68e564a | 3804 | bool close_sessions = false; |
2f2dc053 | 3805 | |
2f2dc053 | 3806 | if (msg->front.iov_len < sizeof(*head)) { |
38d46409 | 3807 | pr_err_client(cl, "got corrupt (short) reply\n"); |
9ec7cab1 | 3808 | ceph_msg_dump(msg); |
2f2dc053 SW |
3809 | return; |
3810 | } | |
3811 | ||
3812 | /* get request, session */ | |
6df058c0 | 3813 | tid = le64_to_cpu(msg->hdr.tid); |
2f2dc053 | 3814 | mutex_lock(&mdsc->mutex); |
fcd00b68 | 3815 | req = lookup_get_request(mdsc, tid); |
2f2dc053 | 3816 | if (!req) { |
38d46409 | 3817 | doutc(cl, "on unknown tid %llu\n", tid); |
2f2dc053 SW |
3818 | mutex_unlock(&mdsc->mutex); |
3819 | return; | |
3820 | } | |
38d46409 | 3821 | doutc(cl, "handle_reply %p\n", req); |
2f2dc053 SW |
3822 | |
3823 | /* correct session? */ | |
d96d6049 | 3824 | if (req->r_session != session) { |
38d46409 XL |
3825 | pr_err_client(cl, "got %llu on session mds%d not mds%d\n", |
3826 | tid, session->s_mds, | |
3827 | req->r_session ? req->r_session->s_mds : -1); | |
2f2dc053 SW |
3828 | mutex_unlock(&mdsc->mutex); |
3829 | goto out; | |
3830 | } | |
3831 | ||
3832 | /* dup? */ | |
bc2de10d JL |
3833 | if ((test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags) && !head->safe) || |
3834 | (test_bit(CEPH_MDS_R_GOT_SAFE, &req->r_req_flags) && head->safe)) { | |
38d46409 XL |
3835 | pr_warn_client(cl, "got a dup %s reply on %llu from mds%d\n", |
3836 | head->safe ? "safe" : "unsafe", tid, mds); | |
2f2dc053 SW |
3837 | mutex_unlock(&mdsc->mutex); |
3838 | goto out; | |
3839 | } | |
bc2de10d | 3840 | if (test_bit(CEPH_MDS_R_GOT_SAFE, &req->r_req_flags)) { |
38d46409 XL |
3841 | pr_warn_client(cl, "got unsafe after safe on %llu from mds%d\n", |
3842 | tid, mds); | |
85792d0d SW |
3843 | mutex_unlock(&mdsc->mutex); |
3844 | goto out; | |
3845 | } | |
2f2dc053 SW |
3846 | |
3847 | result = le32_to_cpu(head->result); | |
3848 | ||
2f2dc053 | 3849 | if (head->safe) { |
bc2de10d | 3850 | set_bit(CEPH_MDS_R_GOT_SAFE, &req->r_req_flags); |
2f2dc053 | 3851 | __unregister_request(mdsc, req); |
2f2dc053 | 3852 | |
07edc057 XL |
3853 | /* last request during umount? */ |
3854 | if (mdsc->stopping && !__get_oldest_req(mdsc)) | |
3855 | complete_all(&mdsc->safe_umount_waiters); | |
3856 | ||
bc2de10d | 3857 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { |
2f2dc053 SW |
3858 | /* |
3859 | * We already handled the unsafe response, now do the | |
3860 | * cleanup. No need to examine the response; the MDS | |
3861 | * doesn't include any result info in the safe | |
3862 | * response. And even if it did, there is nothing | |
3863 | * useful we could do with a revised return value. | |
3864 | */ | |
38d46409 | 3865 | doutc(cl, "got safe reply %llu, mds%d\n", tid, mds); |
2f2dc053 | 3866 | |
2f2dc053 SW |
3867 | mutex_unlock(&mdsc->mutex); |
3868 | goto out; | |
3869 | } | |
e1518c7c | 3870 | } else { |
bc2de10d | 3871 | set_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags); |
2f2dc053 SW |
3872 | list_add_tail(&req->r_unsafe_item, &req->r_session->s_unsafe); |
3873 | } | |
3874 | ||
38d46409 | 3875 | doutc(cl, "tid %lld result %d\n", tid, result); |
b37fe1f9 | 3876 | if (test_bit(CEPHFS_FEATURE_REPLY_ENCODING, &session->s_features)) |
3859af9e | 3877 | err = parse_reply_info(session, msg, req, (u64)-1); |
b37fe1f9 | 3878 | else |
3859af9e XL |
3879 | err = parse_reply_info(session, msg, req, |
3880 | session->s_con.peer_features); | |
2f2dc053 SW |
3881 | mutex_unlock(&mdsc->mutex); |
3882 | ||
bca9fc14 | 3883 | /* Must find target inode outside of mutexes to avoid deadlocks */ |
3859af9e | 3884 | rinfo = &req->r_reply_info; |
bca9fc14 | 3885 | if ((err >= 0) && rinfo->head->is_target) { |
ec9595c0 | 3886 | struct inode *in = xchg(&req->r_new_inode, NULL); |
bca9fc14 JL |
3887 | struct ceph_vino tvino = { |
3888 | .ino = le64_to_cpu(rinfo->targeti.in->ino), | |
3889 | .snap = le64_to_cpu(rinfo->targeti.in->snapid) | |
3890 | }; | |
3891 | ||
ec9595c0 JL |
3892 | /* |
3893 | * If we ended up opening an existing inode, discard | |
3894 | * r_new_inode | |
3895 | */ | |
3896 | if (req->r_op == CEPH_MDS_OP_CREATE && | |
3897 | !req->r_reply_info.has_create_ino) { | |
3898 | /* This should never happen on an async create */ | |
3899 | WARN_ON_ONCE(req->r_deleg_ino); | |
3900 | iput(in); | |
3901 | in = NULL; | |
3902 | } | |
3903 | ||
3904 | in = ceph_get_inode(mdsc->fsc->sb, tvino, in); | |
bca9fc14 JL |
3905 | if (IS_ERR(in)) { |
3906 | err = PTR_ERR(in); | |
3907 | mutex_lock(&session->s_mutex); | |
3908 | goto out_err; | |
3909 | } | |
3910 | req->r_target_inode = in; | |
3911 | } | |
3912 | ||
2f2dc053 SW |
3913 | mutex_lock(&session->s_mutex); |
3914 | if (err < 0) { | |
38d46409 XL |
3915 | pr_err_client(cl, "got corrupt reply mds%d(tid:%lld)\n", |
3916 | mds, tid); | |
9ec7cab1 | 3917 | ceph_msg_dump(msg); |
2f2dc053 SW |
3918 | goto out_err; |
3919 | } | |
3920 | ||
3921 | /* snap trace */ | |
982d6011 | 3922 | realm = NULL; |
2f2dc053 SW |
3923 | if (rinfo->snapblob_len) { |
3924 | down_write(&mdsc->snap_rwsem); | |
a68e564a | 3925 | err = ceph_update_snap_trace(mdsc, rinfo->snapblob, |
982d6011 YZ |
3926 | rinfo->snapblob + rinfo->snapblob_len, |
3927 | le32_to_cpu(head->op) == CEPH_MDS_OP_RMSNAP, | |
3928 | &realm); | |
a68e564a XL |
3929 | if (err) { |
3930 | up_write(&mdsc->snap_rwsem); | |
3931 | close_sessions = true; | |
3932 | if (err == -EIO) | |
3933 | ceph_msg_dump(msg); | |
3934 | goto out_err; | |
3935 | } | |
2f2dc053 SW |
3936 | downgrade_write(&mdsc->snap_rwsem); |
3937 | } else { | |
3938 | down_read(&mdsc->snap_rwsem); | |
3939 | } | |
3940 | ||
3941 | /* insert trace into our cache */ | |
b4556396 | 3942 | mutex_lock(&req->r_fill_mutex); |
315f2408 | 3943 | current->journal_info = req; |
f5a03b08 | 3944 | err = ceph_fill_trace(mdsc->fsc->sb, req); |
2f2dc053 | 3945 | if (err == 0) { |
6e8575fa | 3946 | if (result == 0 && (req->r_op == CEPH_MDS_OP_READDIR || |
81c6aea5 | 3947 | req->r_op == CEPH_MDS_OP_LSSNAP)) |
af9ffa6d | 3948 | err = ceph_readdir_prepopulate(req, req->r_session); |
2f2dc053 | 3949 | } |
315f2408 | 3950 | current->journal_info = NULL; |
b4556396 | 3951 | mutex_unlock(&req->r_fill_mutex); |
2f2dc053 SW |
3952 | |
3953 | up_read(&mdsc->snap_rwsem); | |
982d6011 YZ |
3954 | if (realm) |
3955 | ceph_put_snap_realm(mdsc, realm); | |
68cd5b4b | 3956 | |
fe33032d YZ |
3957 | if (err == 0) { |
3958 | if (req->r_target_inode && | |
3959 | test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { | |
3960 | struct ceph_inode_info *ci = | |
3961 | ceph_inode(req->r_target_inode); | |
3962 | spin_lock(&ci->i_unsafe_lock); | |
3963 | list_add_tail(&req->r_unsafe_target_item, | |
3964 | &ci->i_unsafe_iops); | |
3965 | spin_unlock(&ci->i_unsafe_lock); | |
3966 | } | |
3967 | ||
3968 | ceph_unreserve_caps(mdsc, &req->r_caps_reservation); | |
68cd5b4b | 3969 | } |
2f2dc053 | 3970 | out_err: |
e1518c7c | 3971 | mutex_lock(&mdsc->mutex); |
bc2de10d | 3972 | if (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { |
e1518c7c SW |
3973 | if (err) { |
3974 | req->r_err = err; | |
3975 | } else { | |
5fdb1389 | 3976 | req->r_reply = ceph_msg_get(msg); |
bc2de10d | 3977 | set_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags); |
e1518c7c | 3978 | } |
2f2dc053 | 3979 | } else { |
38d46409 | 3980 | doutc(cl, "reply arrived after request %lld was aborted\n", tid); |
2f2dc053 | 3981 | } |
e1518c7c | 3982 | mutex_unlock(&mdsc->mutex); |
2f2dc053 | 3983 | |
2f2dc053 SW |
3984 | mutex_unlock(&session->s_mutex); |
3985 | ||
3986 | /* kick calling process */ | |
3987 | complete_request(mdsc, req); | |
70c94820 | 3988 | |
8ae99ae2 | 3989 | ceph_update_metadata_metrics(&mdsc->metric, req->r_start_latency, |
70c94820 | 3990 | req->r_end_latency, err); |
2f2dc053 SW |
3991 | out: |
3992 | ceph_mdsc_put_request(req); | |
a68e564a XL |
3993 | |
3994 | /* Defer closing the sessions after s_mutex lock being released */ | |
3995 | if (close_sessions) | |
3996 | ceph_mdsc_close_sessions(mdsc); | |
2f2dc053 SW |
3997 | return; |
3998 | } | |
3999 | ||
4000 | ||
4001 | ||
4002 | /* | |
4003 | * handle mds notification that our request has been forwarded. | |
4004 | */ | |
2600d2dd SW |
4005 | static void handle_forward(struct ceph_mds_client *mdsc, |
4006 | struct ceph_mds_session *session, | |
4007 | struct ceph_msg *msg) | |
2f2dc053 | 4008 | { |
38d46409 | 4009 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 | 4010 | struct ceph_mds_request *req; |
a1ea787c | 4011 | u64 tid = le64_to_cpu(msg->hdr.tid); |
2f2dc053 SW |
4012 | u32 next_mds; |
4013 | u32 fwd_seq; | |
2f2dc053 SW |
4014 | int err = -EINVAL; |
4015 | void *p = msg->front.iov_base; | |
4016 | void *end = p + msg->front.iov_len; | |
1980b1bf | 4017 | bool aborted = false; |
2f2dc053 | 4018 | |
a1ea787c | 4019 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); |
c89136ea SW |
4020 | next_mds = ceph_decode_32(&p); |
4021 | fwd_seq = ceph_decode_32(&p); | |
2f2dc053 SW |
4022 | |
4023 | mutex_lock(&mdsc->mutex); | |
fcd00b68 | 4024 | req = lookup_get_request(mdsc, tid); |
2f2dc053 | 4025 | if (!req) { |
1980b1bf | 4026 | mutex_unlock(&mdsc->mutex); |
38d46409 | 4027 | doutc(cl, "forward tid %llu to mds%d - req dne\n", tid, next_mds); |
1980b1bf | 4028 | return; /* dup reply? */ |
2f2dc053 SW |
4029 | } |
4030 | ||
bc2de10d | 4031 | if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { |
38d46409 | 4032 | doutc(cl, "forward tid %llu aborted, unregistering\n", tid); |
2a8e5e36 | 4033 | __unregister_request(mdsc, req); |
ce0d5bd3 | 4034 | } else if (fwd_seq <= req->r_num_fwd || (uint32_t)fwd_seq >= U32_MAX) { |
1980b1bf | 4035 | /* |
ce0d5bd3 | 4036 | * Avoid inifinite retrying after overflow. |
1980b1bf | 4037 | * |
ce0d5bd3 XL |
4038 | * The MDS will increase the fwd count and in client side |
4039 | * if the num_fwd is less than the one saved in request | |
4040 | * that means the MDS is an old version and overflowed of | |
4041 | * 8 bits. | |
1980b1bf | 4042 | */ |
ce0d5bd3 XL |
4043 | mutex_lock(&req->r_fill_mutex); |
4044 | req->r_err = -EMULTIHOP; | |
4045 | set_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags); | |
4046 | mutex_unlock(&req->r_fill_mutex); | |
4047 | aborted = true; | |
38d46409 XL |
4048 | pr_warn_ratelimited_client(cl, "forward tid %llu seq overflow\n", |
4049 | tid); | |
2f2dc053 SW |
4050 | } else { |
4051 | /* resend. forward race not possible; mds would drop */ | |
38d46409 | 4052 | doutc(cl, "forward tid %llu to mds%d (we resend)\n", tid, next_mds); |
2a8e5e36 | 4053 | BUG_ON(req->r_err); |
bc2de10d | 4054 | BUG_ON(test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)); |
3de22be6 | 4055 | req->r_attempts = 0; |
2f2dc053 SW |
4056 | req->r_num_fwd = fwd_seq; |
4057 | req->r_resend_mds = next_mds; | |
4058 | put_request_session(req); | |
4059 | __do_request(mdsc, req); | |
4060 | } | |
2f2dc053 | 4061 | mutex_unlock(&mdsc->mutex); |
1980b1bf XL |
4062 | |
4063 | /* kick calling process */ | |
4064 | if (aborted) | |
4065 | complete_request(mdsc, req); | |
4066 | ceph_mdsc_put_request(req); | |
2f2dc053 SW |
4067 | return; |
4068 | ||
4069 | bad: | |
38d46409 | 4070 | pr_err_client(cl, "decode error err=%d\n", err); |
8b0da5c5 | 4071 | ceph_msg_dump(msg); |
2f2dc053 SW |
4072 | } |
4073 | ||
131d7eb4 | 4074 | static int __decode_session_metadata(void **p, void *end, |
0b98acd6 | 4075 | bool *blocklisted) |
84bf3950 YZ |
4076 | { |
4077 | /* map<string,string> */ | |
4078 | u32 n; | |
131d7eb4 | 4079 | bool err_str; |
84bf3950 YZ |
4080 | ceph_decode_32_safe(p, end, n, bad); |
4081 | while (n-- > 0) { | |
4082 | u32 len; | |
4083 | ceph_decode_32_safe(p, end, len, bad); | |
4084 | ceph_decode_need(p, end, len, bad); | |
131d7eb4 | 4085 | err_str = !strncmp(*p, "error_string", len); |
84bf3950 YZ |
4086 | *p += len; |
4087 | ceph_decode_32_safe(p, end, len, bad); | |
4088 | ceph_decode_need(p, end, len, bad); | |
4bb926e8 ID |
4089 | /* |
4090 | * Match "blocklisted (blacklisted)" from newer MDSes, | |
4091 | * or "blacklisted" from older MDSes. | |
4092 | */ | |
131d7eb4 | 4093 | if (err_str && strnstr(*p, "blacklisted", len)) |
0b98acd6 | 4094 | *blocklisted = true; |
84bf3950 YZ |
4095 | *p += len; |
4096 | } | |
4097 | return 0; | |
4098 | bad: | |
4099 | return -1; | |
4100 | } | |
4101 | ||
2f2dc053 SW |
4102 | /* |
4103 | * handle a mds session control message | |
4104 | */ | |
4105 | static void handle_session(struct ceph_mds_session *session, | |
4106 | struct ceph_msg *msg) | |
4107 | { | |
4108 | struct ceph_mds_client *mdsc = session->s_mdsc; | |
38d46409 | 4109 | struct ceph_client *cl = mdsc->fsc->client; |
84bf3950 YZ |
4110 | int mds = session->s_mds; |
4111 | int msg_version = le16_to_cpu(msg->hdr.version); | |
4112 | void *p = msg->front.iov_base; | |
4113 | void *end = p + msg->front.iov_len; | |
4114 | struct ceph_mds_session_head *h; | |
2f2dc053 | 4115 | u32 op; |
0fa82633 | 4116 | u64 seq, features = 0; |
2f2dc053 | 4117 | int wake = 0; |
0b98acd6 | 4118 | bool blocklisted = false; |
2f2dc053 | 4119 | |
2f2dc053 | 4120 | /* decode */ |
84bf3950 YZ |
4121 | ceph_decode_need(&p, end, sizeof(*h), bad); |
4122 | h = p; | |
4123 | p += sizeof(*h); | |
4124 | ||
2f2dc053 SW |
4125 | op = le32_to_cpu(h->op); |
4126 | seq = le64_to_cpu(h->seq); | |
4127 | ||
84bf3950 YZ |
4128 | if (msg_version >= 3) { |
4129 | u32 len; | |
e1c9788c KH |
4130 | /* version >= 2 and < 5, decode metadata, skip otherwise |
4131 | * as it's handled via flags. | |
4132 | */ | |
4133 | if (msg_version >= 5) | |
4134 | ceph_decode_skip_map(&p, end, string, string, bad); | |
4135 | else if (__decode_session_metadata(&p, end, &blocklisted) < 0) | |
84bf3950 | 4136 | goto bad; |
e1c9788c | 4137 | |
84bf3950 YZ |
4138 | /* version >= 3, feature bits */ |
4139 | ceph_decode_32_safe(&p, end, len, bad); | |
02e37571 JL |
4140 | if (len) { |
4141 | ceph_decode_64_safe(&p, end, features, bad); | |
4142 | p += len - sizeof(features); | |
4143 | } | |
84bf3950 YZ |
4144 | } |
4145 | ||
e1c9788c | 4146 | if (msg_version >= 5) { |
ea16567f LH |
4147 | u32 flags, len; |
4148 | ||
4149 | /* version >= 4 */ | |
4150 | ceph_decode_skip_16(&p, end, bad); /* struct_v, struct_cv */ | |
4151 | ceph_decode_32_safe(&p, end, len, bad); /* len */ | |
4152 | ceph_decode_skip_n(&p, end, len, bad); /* metric_spec */ | |
4153 | ||
e1c9788c | 4154 | /* version >= 5, flags */ |
ea16567f | 4155 | ceph_decode_32_safe(&p, end, flags, bad); |
e1c9788c | 4156 | if (flags & CEPH_SESSION_BLOCKLISTED) { |
38d46409 XL |
4157 | pr_warn_client(cl, "mds%d session blocklisted\n", |
4158 | session->s_mds); | |
e1c9788c KH |
4159 | blocklisted = true; |
4160 | } | |
4161 | } | |
4162 | ||
2f2dc053 | 4163 | mutex_lock(&mdsc->mutex); |
0a07fc8c | 4164 | if (op == CEPH_SESSION_CLOSE) { |
5b3248c6 | 4165 | ceph_get_mds_session(session); |
2600d2dd | 4166 | __unregister_session(mdsc, session); |
0a07fc8c | 4167 | } |
2f2dc053 SW |
4168 | /* FIXME: this ttl calculation is generous */ |
4169 | session->s_ttl = jiffies + HZ*mdsc->mdsmap->m_session_autoclose; | |
4170 | mutex_unlock(&mdsc->mutex); | |
4171 | ||
4172 | mutex_lock(&session->s_mutex); | |
4173 | ||
38d46409 XL |
4174 | doutc(cl, "mds%d %s %p state %s seq %llu\n", mds, |
4175 | ceph_session_op_name(op), session, | |
4176 | ceph_session_state_name(session->s_state), seq); | |
2f2dc053 SW |
4177 | |
4178 | if (session->s_state == CEPH_MDS_SESSION_HUNG) { | |
4179 | session->s_state = CEPH_MDS_SESSION_OPEN; | |
38d46409 | 4180 | pr_info_client(cl, "mds%d came back\n", session->s_mds); |
2f2dc053 SW |
4181 | } |
4182 | ||
4183 | switch (op) { | |
4184 | case CEPH_SESSION_OPEN: | |
29790f26 | 4185 | if (session->s_state == CEPH_MDS_SESSION_RECONNECTING) |
38d46409 XL |
4186 | pr_info_client(cl, "mds%d reconnect success\n", |
4187 | session->s_mds); | |
300e42a2 | 4188 | |
f48e0342 | 4189 | session->s_features = features; |
300e42a2 | 4190 | if (session->s_state == CEPH_MDS_SESSION_OPEN) { |
38d46409 XL |
4191 | pr_notice_client(cl, "mds%d is already opened\n", |
4192 | session->s_mds); | |
300e42a2 XL |
4193 | } else { |
4194 | session->s_state = CEPH_MDS_SESSION_OPEN; | |
300e42a2 XL |
4195 | renewed_caps(mdsc, session, 0); |
4196 | if (test_bit(CEPHFS_FEATURE_METRIC_COLLECT, | |
4197 | &session->s_features)) | |
4198 | metric_schedule_delayed(&mdsc->metric); | |
4199 | } | |
4200 | ||
4201 | /* | |
4202 | * The connection maybe broken and the session in client | |
4203 | * side has been reinitialized, need to update the seq | |
4204 | * anyway. | |
4205 | */ | |
4206 | if (!session->s_seq && seq) | |
4207 | session->s_seq = seq; | |
4208 | ||
2f2dc053 SW |
4209 | wake = 1; |
4210 | if (mdsc->stopping) | |
4211 | __close_session(mdsc, session); | |
4212 | break; | |
4213 | ||
4214 | case CEPH_SESSION_RENEWCAPS: | |
4215 | if (session->s_renew_seq == seq) | |
4216 | renewed_caps(mdsc, session, 1); | |
4217 | break; | |
4218 | ||
4219 | case CEPH_SESSION_CLOSE: | |
29790f26 | 4220 | if (session->s_state == CEPH_MDS_SESSION_RECONNECTING) |
38d46409 XL |
4221 | pr_info_client(cl, "mds%d reconnect denied\n", |
4222 | session->s_mds); | |
4d681c2f | 4223 | session->s_state = CEPH_MDS_SESSION_CLOSED; |
1c841a96 | 4224 | cleanup_session_requests(mdsc, session); |
2f2dc053 | 4225 | remove_session_caps(session); |
656e4382 | 4226 | wake = 2; /* for good measure */ |
f3c60c59 | 4227 | wake_up_all(&mdsc->session_close_wq); |
2f2dc053 SW |
4228 | break; |
4229 | ||
4230 | case CEPH_SESSION_STALE: | |
38d46409 XL |
4231 | pr_info_client(cl, "mds%d caps went stale, renewing\n", |
4232 | session->s_mds); | |
52d60f8e | 4233 | atomic_inc(&session->s_cap_gen); |
1ce208a6 | 4234 | session->s_cap_ttl = jiffies - 1; |
2f2dc053 SW |
4235 | send_renew_caps(mdsc, session); |
4236 | break; | |
4237 | ||
4238 | case CEPH_SESSION_RECALL_STATE: | |
e30ee581 | 4239 | ceph_trim_caps(mdsc, session, le32_to_cpu(h->max_caps)); |
2f2dc053 SW |
4240 | break; |
4241 | ||
186e4f7a | 4242 | case CEPH_SESSION_FLUSHMSG: |
e7d84c6a XL |
4243 | /* flush cap releases */ |
4244 | spin_lock(&session->s_cap_lock); | |
4245 | if (session->s_num_cap_releases) | |
4246 | ceph_flush_cap_releases(mdsc, session); | |
4247 | spin_unlock(&session->s_cap_lock); | |
4248 | ||
186e4f7a YZ |
4249 | send_flushmsg_ack(mdsc, session, seq); |
4250 | break; | |
4251 | ||
03f4fcb0 | 4252 | case CEPH_SESSION_FORCE_RO: |
38d46409 | 4253 | doutc(cl, "force_session_readonly %p\n", session); |
03f4fcb0 YZ |
4254 | spin_lock(&session->s_cap_lock); |
4255 | session->s_readonly = true; | |
4256 | spin_unlock(&session->s_cap_lock); | |
d2f8bb27 | 4257 | wake_up_session_caps(session, FORCE_RO); |
03f4fcb0 YZ |
4258 | break; |
4259 | ||
fcff415c YZ |
4260 | case CEPH_SESSION_REJECT: |
4261 | WARN_ON(session->s_state != CEPH_MDS_SESSION_OPENING); | |
38d46409 XL |
4262 | pr_info_client(cl, "mds%d rejected session\n", |
4263 | session->s_mds); | |
fcff415c YZ |
4264 | session->s_state = CEPH_MDS_SESSION_REJECTED; |
4265 | cleanup_session_requests(mdsc, session); | |
4266 | remove_session_caps(session); | |
0b98acd6 ID |
4267 | if (blocklisted) |
4268 | mdsc->fsc->blocklisted = true; | |
fcff415c YZ |
4269 | wake = 2; /* for good measure */ |
4270 | break; | |
4271 | ||
2f2dc053 | 4272 | default: |
38d46409 | 4273 | pr_err_client(cl, "bad op %d mds%d\n", op, mds); |
2f2dc053 SW |
4274 | WARN_ON(1); |
4275 | } | |
4276 | ||
4277 | mutex_unlock(&session->s_mutex); | |
4278 | if (wake) { | |
4279 | mutex_lock(&mdsc->mutex); | |
4280 | __wake_requests(mdsc, &session->s_waiting); | |
656e4382 YZ |
4281 | if (wake == 2) |
4282 | kick_requests(mdsc, mds); | |
2f2dc053 SW |
4283 | mutex_unlock(&mdsc->mutex); |
4284 | } | |
0a07fc8c YZ |
4285 | if (op == CEPH_SESSION_CLOSE) |
4286 | ceph_put_mds_session(session); | |
2f2dc053 SW |
4287 | return; |
4288 | ||
4289 | bad: | |
38d46409 XL |
4290 | pr_err_client(cl, "corrupt message mds%d len %d\n", mds, |
4291 | (int)msg->front.iov_len); | |
9ec7cab1 | 4292 | ceph_msg_dump(msg); |
2f2dc053 SW |
4293 | return; |
4294 | } | |
4295 | ||
a25949b9 JL |
4296 | void ceph_mdsc_release_dir_caps(struct ceph_mds_request *req) |
4297 | { | |
38d46409 | 4298 | struct ceph_client *cl = req->r_mdsc->fsc->client; |
a25949b9 JL |
4299 | int dcaps; |
4300 | ||
4301 | dcaps = xchg(&req->r_dir_caps, 0); | |
4302 | if (dcaps) { | |
38d46409 | 4303 | doutc(cl, "releasing r_dir_caps=%s\n", ceph_cap_string(dcaps)); |
a25949b9 JL |
4304 | ceph_put_cap_refs(ceph_inode(req->r_parent), dcaps); |
4305 | } | |
4306 | } | |
4307 | ||
07045648 | 4308 | void ceph_mdsc_release_dir_caps_async(struct ceph_mds_request *req) |
e64f44a8 | 4309 | { |
38d46409 | 4310 | struct ceph_client *cl = req->r_mdsc->fsc->client; |
e64f44a8 XL |
4311 | int dcaps; |
4312 | ||
4313 | dcaps = xchg(&req->r_dir_caps, 0); | |
4314 | if (dcaps) { | |
38d46409 | 4315 | doutc(cl, "releasing r_dir_caps=%s\n", ceph_cap_string(dcaps)); |
07045648 | 4316 | ceph_put_cap_refs_async(ceph_inode(req->r_parent), dcaps); |
e64f44a8 XL |
4317 | } |
4318 | } | |
4319 | ||
2f2dc053 SW |
4320 | /* |
4321 | * called under session->mutex. | |
4322 | */ | |
4323 | static void replay_unsafe_requests(struct ceph_mds_client *mdsc, | |
4324 | struct ceph_mds_session *session) | |
4325 | { | |
4326 | struct ceph_mds_request *req, *nreq; | |
3de22be6 | 4327 | struct rb_node *p; |
2f2dc053 | 4328 | |
38d46409 | 4329 | doutc(mdsc->fsc->client, "mds%d\n", session->s_mds); |
2f2dc053 SW |
4330 | |
4331 | mutex_lock(&mdsc->mutex); | |
9cf54563 | 4332 | list_for_each_entry_safe(req, nreq, &session->s_unsafe, r_unsafe_item) |
396bd62c | 4333 | __send_request(session, req, true); |
3de22be6 YZ |
4334 | |
4335 | /* | |
4336 | * also re-send old requests when MDS enters reconnect stage. So that MDS | |
4337 | * can process completed request in clientreplay stage. | |
4338 | */ | |
4339 | p = rb_first(&mdsc->request_tree); | |
4340 | while (p) { | |
4341 | req = rb_entry(p, struct ceph_mds_request, r_node); | |
4342 | p = rb_next(p); | |
bc2de10d | 4343 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) |
3de22be6 YZ |
4344 | continue; |
4345 | if (req->r_attempts == 0) | |
4346 | continue; /* only old requests */ | |
a25949b9 JL |
4347 | if (!req->r_session) |
4348 | continue; | |
4349 | if (req->r_session->s_mds != session->s_mds) | |
4350 | continue; | |
4351 | ||
07045648 | 4352 | ceph_mdsc_release_dir_caps_async(req); |
a25949b9 | 4353 | |
396bd62c | 4354 | __send_request(session, req, true); |
3de22be6 | 4355 | } |
2f2dc053 SW |
4356 | mutex_unlock(&mdsc->mutex); |
4357 | } | |
4358 | ||
81c5a148 YZ |
4359 | static int send_reconnect_partial(struct ceph_reconnect_state *recon_state) |
4360 | { | |
4361 | struct ceph_msg *reply; | |
4362 | struct ceph_pagelist *_pagelist; | |
4363 | struct page *page; | |
4364 | __le32 *addr; | |
4365 | int err = -ENOMEM; | |
4366 | ||
4367 | if (!recon_state->allow_multi) | |
4368 | return -ENOSPC; | |
4369 | ||
4370 | /* can't handle message that contains both caps and realm */ | |
4371 | BUG_ON(!recon_state->nr_caps == !recon_state->nr_realms); | |
4372 | ||
4373 | /* pre-allocate new pagelist */ | |
4374 | _pagelist = ceph_pagelist_alloc(GFP_NOFS); | |
4375 | if (!_pagelist) | |
4376 | return -ENOMEM; | |
4377 | ||
4378 | reply = ceph_msg_new2(CEPH_MSG_CLIENT_RECONNECT, 0, 1, GFP_NOFS, false); | |
4379 | if (!reply) | |
4380 | goto fail_msg; | |
4381 | ||
4382 | /* placeholder for nr_caps */ | |
4383 | err = ceph_pagelist_encode_32(_pagelist, 0); | |
4384 | if (err < 0) | |
4385 | goto fail; | |
4386 | ||
4387 | if (recon_state->nr_caps) { | |
4388 | /* currently encoding caps */ | |
4389 | err = ceph_pagelist_encode_32(recon_state->pagelist, 0); | |
4390 | if (err) | |
4391 | goto fail; | |
4392 | } else { | |
4393 | /* placeholder for nr_realms (currently encoding relams) */ | |
4394 | err = ceph_pagelist_encode_32(_pagelist, 0); | |
4395 | if (err < 0) | |
4396 | goto fail; | |
4397 | } | |
4398 | ||
4399 | err = ceph_pagelist_encode_8(recon_state->pagelist, 1); | |
4400 | if (err) | |
4401 | goto fail; | |
4402 | ||
4403 | page = list_first_entry(&recon_state->pagelist->head, struct page, lru); | |
4404 | addr = kmap_atomic(page); | |
4405 | if (recon_state->nr_caps) { | |
4406 | /* currently encoding caps */ | |
4407 | *addr = cpu_to_le32(recon_state->nr_caps); | |
4408 | } else { | |
4409 | /* currently encoding relams */ | |
4410 | *(addr + 1) = cpu_to_le32(recon_state->nr_realms); | |
4411 | } | |
4412 | kunmap_atomic(addr); | |
4413 | ||
4414 | reply->hdr.version = cpu_to_le16(5); | |
4415 | reply->hdr.compat_version = cpu_to_le16(4); | |
4416 | ||
4417 | reply->hdr.data_len = cpu_to_le32(recon_state->pagelist->length); | |
4418 | ceph_msg_data_add_pagelist(reply, recon_state->pagelist); | |
4419 | ||
4420 | ceph_con_send(&recon_state->session->s_con, reply); | |
4421 | ceph_pagelist_release(recon_state->pagelist); | |
4422 | ||
4423 | recon_state->pagelist = _pagelist; | |
4424 | recon_state->nr_caps = 0; | |
4425 | recon_state->nr_realms = 0; | |
4426 | recon_state->msg_version = 5; | |
4427 | return 0; | |
4428 | fail: | |
4429 | ceph_msg_put(reply); | |
4430 | fail_msg: | |
4431 | ceph_pagelist_release(_pagelist); | |
4432 | return err; | |
4433 | } | |
4434 | ||
a33f6432 YZ |
4435 | static struct dentry* d_find_primary(struct inode *inode) |
4436 | { | |
4437 | struct dentry *alias, *dn = NULL; | |
4438 | ||
4439 | if (hlist_empty(&inode->i_dentry)) | |
4440 | return NULL; | |
4441 | ||
4442 | spin_lock(&inode->i_lock); | |
4443 | if (hlist_empty(&inode->i_dentry)) | |
4444 | goto out_unlock; | |
4445 | ||
4446 | if (S_ISDIR(inode->i_mode)) { | |
4447 | alias = hlist_entry(inode->i_dentry.first, struct dentry, d_u.d_alias); | |
4448 | if (!IS_ROOT(alias)) | |
4449 | dn = dget(alias); | |
4450 | goto out_unlock; | |
4451 | } | |
4452 | ||
4453 | hlist_for_each_entry(alias, &inode->i_dentry, d_u.d_alias) { | |
4454 | spin_lock(&alias->d_lock); | |
4455 | if (!d_unhashed(alias) && | |
4456 | (ceph_dentry(alias)->flags & CEPH_DENTRY_PRIMARY_LINK)) { | |
4457 | dn = dget_dlock(alias); | |
4458 | } | |
4459 | spin_unlock(&alias->d_lock); | |
4460 | if (dn) | |
4461 | break; | |
4462 | } | |
4463 | out_unlock: | |
4464 | spin_unlock(&inode->i_lock); | |
4465 | return dn; | |
4466 | } | |
4467 | ||
2f2dc053 SW |
4468 | /* |
4469 | * Encode information about a cap for a reconnect with the MDS. | |
4470 | */ | |
aaf67de7 | 4471 | static int reconnect_caps_cb(struct inode *inode, int mds, void *arg) |
2f2dc053 | 4472 | { |
197b7d79 | 4473 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
38d46409 | 4474 | struct ceph_client *cl = ceph_inode_to_client(inode); |
20cb34ae SW |
4475 | union { |
4476 | struct ceph_mds_cap_reconnect v2; | |
4477 | struct ceph_mds_cap_reconnect_v1 v1; | |
4478 | } rec; | |
aaf67de7 | 4479 | struct ceph_inode_info *ci = ceph_inode(inode); |
20cb34ae SW |
4480 | struct ceph_reconnect_state *recon_state = arg; |
4481 | struct ceph_pagelist *pagelist = recon_state->pagelist; | |
a33f6432 | 4482 | struct dentry *dentry; |
aaf67de7 | 4483 | struct ceph_cap *cap; |
a33f6432 | 4484 | char *path; |
9aaa7eb0 | 4485 | int pathlen = 0, err; |
a33f6432 | 4486 | u64 pathbase; |
3469ed0d | 4487 | u64 snap_follows; |
2f2dc053 | 4488 | |
a33f6432 YZ |
4489 | dentry = d_find_primary(inode); |
4490 | if (dentry) { | |
4491 | /* set pathbase to parent dir when msg_version >= 2 */ | |
197b7d79 | 4492 | path = ceph_mdsc_build_path(mdsc, dentry, &pathlen, &pathbase, |
a33f6432 YZ |
4493 | recon_state->msg_version >= 2); |
4494 | dput(dentry); | |
4495 | if (IS_ERR(path)) { | |
4496 | err = PTR_ERR(path); | |
4497 | goto out_err; | |
4498 | } | |
4499 | } else { | |
4500 | path = NULL; | |
a33f6432 YZ |
4501 | pathbase = 0; |
4502 | } | |
4503 | ||
be655596 | 4504 | spin_lock(&ci->i_ceph_lock); |
aaf67de7 XL |
4505 | cap = __get_cap_for_mds(ci, mds); |
4506 | if (!cap) { | |
4507 | spin_unlock(&ci->i_ceph_lock); | |
9aaa7eb0 | 4508 | err = 0; |
aaf67de7 XL |
4509 | goto out_err; |
4510 | } | |
38d46409 XL |
4511 | doutc(cl, " adding %p ino %llx.%llx cap %p %lld %s\n", inode, |
4512 | ceph_vinop(inode), cap, cap->cap_id, | |
4513 | ceph_cap_string(cap->issued)); | |
aaf67de7 | 4514 | |
2f2dc053 SW |
4515 | cap->seq = 0; /* reset cap seq */ |
4516 | cap->issue_seq = 0; /* and issue_seq */ | |
667ca05c | 4517 | cap->mseq = 0; /* and migrate_seq */ |
52d60f8e | 4518 | cap->cap_gen = atomic_read(&cap->session->s_cap_gen); |
20cb34ae | 4519 | |
a25949b9 | 4520 | /* These are lost when the session goes away */ |
785892fe JL |
4521 | if (S_ISDIR(inode->i_mode)) { |
4522 | if (cap->issued & CEPH_CAP_DIR_CREATE) { | |
4523 | ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns)); | |
4524 | memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout)); | |
4525 | } | |
a25949b9 | 4526 | cap->issued &= ~CEPH_CAP_ANY_DIR_OPS; |
785892fe | 4527 | } |
a25949b9 | 4528 | |
121f22a1 | 4529 | if (recon_state->msg_version >= 2) { |
20cb34ae SW |
4530 | rec.v2.cap_id = cpu_to_le64(cap->cap_id); |
4531 | rec.v2.wanted = cpu_to_le32(__ceph_caps_wanted(ci)); | |
4532 | rec.v2.issued = cpu_to_le32(cap->issued); | |
4533 | rec.v2.snaprealm = cpu_to_le64(ci->i_snap_realm->ino); | |
a33f6432 | 4534 | rec.v2.pathbase = cpu_to_le64(pathbase); |
ec1dff25 JL |
4535 | rec.v2.flock_len = (__force __le32) |
4536 | ((ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) ? 0 : 1); | |
20cb34ae | 4537 | } else { |
c453bdb5 JL |
4538 | struct timespec64 ts; |
4539 | ||
20cb34ae SW |
4540 | rec.v1.cap_id = cpu_to_le64(cap->cap_id); |
4541 | rec.v1.wanted = cpu_to_le32(__ceph_caps_wanted(ci)); | |
4542 | rec.v1.issued = cpu_to_le32(cap->issued); | |
2d6795fb | 4543 | rec.v1.size = cpu_to_le64(i_size_read(inode)); |
c453bdb5 JL |
4544 | ts = inode_get_mtime(inode); |
4545 | ceph_encode_timespec64(&rec.v1.mtime, &ts); | |
4546 | ts = inode_get_atime(inode); | |
4547 | ceph_encode_timespec64(&rec.v1.atime, &ts); | |
20cb34ae | 4548 | rec.v1.snaprealm = cpu_to_le64(ci->i_snap_realm->ino); |
a33f6432 | 4549 | rec.v1.pathbase = cpu_to_le64(pathbase); |
20cb34ae | 4550 | } |
3469ed0d YZ |
4551 | |
4552 | if (list_empty(&ci->i_cap_snaps)) { | |
92776fd2 | 4553 | snap_follows = ci->i_head_snapc ? ci->i_head_snapc->seq : 0; |
3469ed0d YZ |
4554 | } else { |
4555 | struct ceph_cap_snap *capsnap = | |
4556 | list_first_entry(&ci->i_cap_snaps, | |
4557 | struct ceph_cap_snap, ci_item); | |
4558 | snap_follows = capsnap->follows; | |
20cb34ae | 4559 | } |
be655596 | 4560 | spin_unlock(&ci->i_ceph_lock); |
2f2dc053 | 4561 | |
121f22a1 | 4562 | if (recon_state->msg_version >= 2) { |
40819f6f | 4563 | int num_fcntl_locks, num_flock_locks; |
4deb14a2 | 4564 | struct ceph_filelock *flocks = NULL; |
81c5a148 | 4565 | size_t struct_len, total_len = sizeof(u64); |
121f22a1 | 4566 | u8 struct_v = 0; |
39be95e9 JS |
4567 | |
4568 | encode_again: | |
b3f8d68f YZ |
4569 | if (rec.v2.flock_len) { |
4570 | ceph_count_locks(inode, &num_fcntl_locks, &num_flock_locks); | |
4571 | } else { | |
4572 | num_fcntl_locks = 0; | |
4573 | num_flock_locks = 0; | |
4574 | } | |
4deb14a2 | 4575 | if (num_fcntl_locks + num_flock_locks > 0) { |
6da2ec56 KC |
4576 | flocks = kmalloc_array(num_fcntl_locks + num_flock_locks, |
4577 | sizeof(struct ceph_filelock), | |
4578 | GFP_NOFS); | |
4deb14a2 YZ |
4579 | if (!flocks) { |
4580 | err = -ENOMEM; | |
5ccedf1c | 4581 | goto out_err; |
4deb14a2 YZ |
4582 | } |
4583 | err = ceph_encode_locks_to_buffer(inode, flocks, | |
4584 | num_fcntl_locks, | |
4585 | num_flock_locks); | |
4586 | if (err) { | |
4587 | kfree(flocks); | |
4588 | flocks = NULL; | |
4589 | if (err == -ENOSPC) | |
4590 | goto encode_again; | |
5ccedf1c | 4591 | goto out_err; |
4deb14a2 YZ |
4592 | } |
4593 | } else { | |
39be95e9 | 4594 | kfree(flocks); |
4deb14a2 | 4595 | flocks = NULL; |
39be95e9 | 4596 | } |
121f22a1 YZ |
4597 | |
4598 | if (recon_state->msg_version >= 3) { | |
4599 | /* version, compat_version and struct_len */ | |
81c5a148 | 4600 | total_len += 2 * sizeof(u8) + sizeof(u32); |
3469ed0d | 4601 | struct_v = 2; |
121f22a1 | 4602 | } |
39be95e9 JS |
4603 | /* |
4604 | * number of encoded locks is stable, so copy to pagelist | |
4605 | */ | |
121f22a1 YZ |
4606 | struct_len = 2 * sizeof(u32) + |
4607 | (num_fcntl_locks + num_flock_locks) * | |
4608 | sizeof(struct ceph_filelock); | |
4609 | rec.v2.flock_len = cpu_to_le32(struct_len); | |
4610 | ||
a33f6432 | 4611 | struct_len += sizeof(u32) + pathlen + sizeof(rec.v2); |
121f22a1 | 4612 | |
3469ed0d YZ |
4613 | if (struct_v >= 2) |
4614 | struct_len += sizeof(u64); /* snap_follows */ | |
4615 | ||
121f22a1 | 4616 | total_len += struct_len; |
81c5a148 YZ |
4617 | |
4618 | if (pagelist->length + total_len > RECONNECT_MAX_SIZE) { | |
4619 | err = send_reconnect_partial(recon_state); | |
4620 | if (err) | |
4621 | goto out_freeflocks; | |
4622 | pagelist = recon_state->pagelist; | |
5ccedf1c | 4623 | } |
121f22a1 | 4624 | |
81c5a148 YZ |
4625 | err = ceph_pagelist_reserve(pagelist, total_len); |
4626 | if (err) | |
4627 | goto out_freeflocks; | |
4628 | ||
4629 | ceph_pagelist_encode_64(pagelist, ceph_ino(inode)); | |
5ccedf1c YZ |
4630 | if (recon_state->msg_version >= 3) { |
4631 | ceph_pagelist_encode_8(pagelist, struct_v); | |
4632 | ceph_pagelist_encode_8(pagelist, 1); | |
4633 | ceph_pagelist_encode_32(pagelist, struct_len); | |
121f22a1 | 4634 | } |
a33f6432 | 4635 | ceph_pagelist_encode_string(pagelist, path, pathlen); |
5ccedf1c YZ |
4636 | ceph_pagelist_append(pagelist, &rec, sizeof(rec.v2)); |
4637 | ceph_locks_to_pagelist(flocks, pagelist, | |
4638 | num_fcntl_locks, num_flock_locks); | |
4639 | if (struct_v >= 2) | |
4640 | ceph_pagelist_encode_64(pagelist, snap_follows); | |
81c5a148 | 4641 | out_freeflocks: |
39be95e9 | 4642 | kfree(flocks); |
3612abbd | 4643 | } else { |
5ccedf1c | 4644 | err = ceph_pagelist_reserve(pagelist, |
81c5a148 YZ |
4645 | sizeof(u64) + sizeof(u32) + |
4646 | pathlen + sizeof(rec.v1)); | |
a33f6432 YZ |
4647 | if (err) |
4648 | goto out_err; | |
5ccedf1c | 4649 | |
81c5a148 | 4650 | ceph_pagelist_encode_64(pagelist, ceph_ino(inode)); |
5ccedf1c YZ |
4651 | ceph_pagelist_encode_string(pagelist, path, pathlen); |
4652 | ceph_pagelist_append(pagelist, &rec, sizeof(rec.v1)); | |
40819f6f | 4653 | } |
44c99757 | 4654 | |
5ccedf1c | 4655 | out_err: |
a33f6432 YZ |
4656 | ceph_mdsc_free_path(path, pathlen); |
4657 | if (!err) | |
81c5a148 YZ |
4658 | recon_state->nr_caps++; |
4659 | return err; | |
4660 | } | |
4661 | ||
4662 | static int encode_snap_realms(struct ceph_mds_client *mdsc, | |
4663 | struct ceph_reconnect_state *recon_state) | |
4664 | { | |
4665 | struct rb_node *p; | |
4666 | struct ceph_pagelist *pagelist = recon_state->pagelist; | |
38d46409 | 4667 | struct ceph_client *cl = mdsc->fsc->client; |
81c5a148 YZ |
4668 | int err = 0; |
4669 | ||
4670 | if (recon_state->msg_version >= 4) { | |
4671 | err = ceph_pagelist_encode_32(pagelist, mdsc->num_snap_realms); | |
4672 | if (err < 0) | |
4673 | goto fail; | |
4674 | } | |
4675 | ||
4676 | /* | |
4677 | * snaprealms. we provide mds with the ino, seq (version), and | |
4678 | * parent for all of our realms. If the mds has any newer info, | |
4679 | * it will tell us. | |
4680 | */ | |
4681 | for (p = rb_first(&mdsc->snap_realms); p; p = rb_next(p)) { | |
4682 | struct ceph_snap_realm *realm = | |
4683 | rb_entry(p, struct ceph_snap_realm, node); | |
4684 | struct ceph_mds_snaprealm_reconnect sr_rec; | |
4685 | ||
4686 | if (recon_state->msg_version >= 4) { | |
4687 | size_t need = sizeof(u8) * 2 + sizeof(u32) + | |
4688 | sizeof(sr_rec); | |
4689 | ||
4690 | if (pagelist->length + need > RECONNECT_MAX_SIZE) { | |
4691 | err = send_reconnect_partial(recon_state); | |
4692 | if (err) | |
4693 | goto fail; | |
4694 | pagelist = recon_state->pagelist; | |
4695 | } | |
4696 | ||
4697 | err = ceph_pagelist_reserve(pagelist, need); | |
4698 | if (err) | |
4699 | goto fail; | |
4700 | ||
4701 | ceph_pagelist_encode_8(pagelist, 1); | |
4702 | ceph_pagelist_encode_8(pagelist, 1); | |
4703 | ceph_pagelist_encode_32(pagelist, sizeof(sr_rec)); | |
4704 | } | |
4705 | ||
38d46409 XL |
4706 | doutc(cl, " adding snap realm %llx seq %lld parent %llx\n", |
4707 | realm->ino, realm->seq, realm->parent_ino); | |
81c5a148 YZ |
4708 | sr_rec.ino = cpu_to_le64(realm->ino); |
4709 | sr_rec.seq = cpu_to_le64(realm->seq); | |
4710 | sr_rec.parent = cpu_to_le64(realm->parent_ino); | |
4711 | ||
4712 | err = ceph_pagelist_append(pagelist, &sr_rec, sizeof(sr_rec)); | |
4713 | if (err) | |
4714 | goto fail; | |
4715 | ||
4716 | recon_state->nr_realms++; | |
4717 | } | |
4718 | fail: | |
93cea5be | 4719 | return err; |
2f2dc053 SW |
4720 | } |
4721 | ||
4722 | ||
4723 | /* | |
4724 | * If an MDS fails and recovers, clients need to reconnect in order to | |
4725 | * reestablish shared state. This includes all caps issued through | |
4726 | * this session _and_ the snap_realm hierarchy. Because it's not | |
4727 | * clear which snap realms the mds cares about, we send everything we | |
4728 | * know about.. that ensures we'll then get any new info the | |
4729 | * recovering MDS might have. | |
4730 | * | |
4731 | * This is a relatively heavyweight operation, but it's rare. | |
2f2dc053 | 4732 | */ |
34b6c855 SW |
4733 | static void send_mds_reconnect(struct ceph_mds_client *mdsc, |
4734 | struct ceph_mds_session *session) | |
2f2dc053 | 4735 | { |
38d46409 | 4736 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 | 4737 | struct ceph_msg *reply; |
34b6c855 | 4738 | int mds = session->s_mds; |
9abf82b8 | 4739 | int err = -ENOMEM; |
81c5a148 YZ |
4740 | struct ceph_reconnect_state recon_state = { |
4741 | .session = session, | |
4742 | }; | |
c8a96a31 | 4743 | LIST_HEAD(dispose); |
2f2dc053 | 4744 | |
38d46409 | 4745 | pr_info_client(cl, "mds%d reconnect start\n", mds); |
2f2dc053 | 4746 | |
81c5a148 YZ |
4747 | recon_state.pagelist = ceph_pagelist_alloc(GFP_NOFS); |
4748 | if (!recon_state.pagelist) | |
93cea5be | 4749 | goto fail_nopagelist; |
93cea5be | 4750 | |
0d9c1ab3 | 4751 | reply = ceph_msg_new2(CEPH_MSG_CLIENT_RECONNECT, 0, 1, GFP_NOFS, false); |
a79832f2 | 4752 | if (!reply) |
93cea5be | 4753 | goto fail_nomsg; |
93cea5be | 4754 | |
d4846487 JL |
4755 | xa_destroy(&session->s_delegated_inos); |
4756 | ||
34b6c855 SW |
4757 | mutex_lock(&session->s_mutex); |
4758 | session->s_state = CEPH_MDS_SESSION_RECONNECTING; | |
4759 | session->s_seq = 0; | |
2f2dc053 | 4760 | |
38d46409 XL |
4761 | doutc(cl, "session %p state %s\n", session, |
4762 | ceph_session_state_name(session->s_state)); | |
2f2dc053 | 4763 | |
52d60f8e | 4764 | atomic_inc(&session->s_cap_gen); |
99a9c273 YZ |
4765 | |
4766 | spin_lock(&session->s_cap_lock); | |
03f4fcb0 YZ |
4767 | /* don't know if session is readonly */ |
4768 | session->s_readonly = 0; | |
99a9c273 YZ |
4769 | /* |
4770 | * notify __ceph_remove_cap() that we are composing cap reconnect. | |
4771 | * If a cap get released before being added to the cap reconnect, | |
4772 | * __ceph_remove_cap() should skip queuing cap release. | |
4773 | */ | |
4774 | session->s_cap_reconnect = 1; | |
e01a5946 | 4775 | /* drop old cap expires; we're about to reestablish that state */ |
c8a96a31 JL |
4776 | detach_cap_releases(session, &dispose); |
4777 | spin_unlock(&session->s_cap_lock); | |
4778 | dispose_cap_releases(mdsc, &dispose); | |
e01a5946 | 4779 | |
5d23371f | 4780 | /* trim unused caps to reduce MDS's cache rejoin time */ |
c0bd50e2 YZ |
4781 | if (mdsc->fsc->sb->s_root) |
4782 | shrink_dcache_parent(mdsc->fsc->sb->s_root); | |
5d23371f YZ |
4783 | |
4784 | ceph_con_close(&session->s_con); | |
4785 | ceph_con_open(&session->s_con, | |
4786 | CEPH_ENTITY_TYPE_MDS, mds, | |
4787 | ceph_mdsmap_get_addr(mdsc->mdsmap, mds)); | |
4788 | ||
4789 | /* replay unsafe requests */ | |
4790 | replay_unsafe_requests(mdsc, session); | |
4791 | ||
81c5a148 YZ |
4792 | ceph_early_kick_flushing_caps(mdsc, session); |
4793 | ||
5d23371f YZ |
4794 | down_read(&mdsc->snap_rwsem); |
4795 | ||
81c5a148 YZ |
4796 | /* placeholder for nr_caps */ |
4797 | err = ceph_pagelist_encode_32(recon_state.pagelist, 0); | |
93cea5be SW |
4798 | if (err) |
4799 | goto fail; | |
20cb34ae | 4800 | |
81c5a148 | 4801 | if (test_bit(CEPHFS_FEATURE_MULTI_RECONNECT, &session->s_features)) { |
121f22a1 | 4802 | recon_state.msg_version = 3; |
81c5a148 YZ |
4803 | recon_state.allow_multi = true; |
4804 | } else if (session->s_con.peer_features & CEPH_FEATURE_MDSENC) { | |
4805 | recon_state.msg_version = 3; | |
4806 | } else { | |
23c625ce | 4807 | recon_state.msg_version = 2; |
81c5a148 YZ |
4808 | } |
4809 | /* trsaverse this session's caps */ | |
a25949b9 | 4810 | err = ceph_iterate_session_caps(session, reconnect_caps_cb, &recon_state); |
2f2dc053 | 4811 | |
99a9c273 YZ |
4812 | spin_lock(&session->s_cap_lock); |
4813 | session->s_cap_reconnect = 0; | |
4814 | spin_unlock(&session->s_cap_lock); | |
4815 | ||
81c5a148 YZ |
4816 | if (err < 0) |
4817 | goto fail; | |
2f2dc053 | 4818 | |
81c5a148 YZ |
4819 | /* check if all realms can be encoded into current message */ |
4820 | if (mdsc->num_snap_realms) { | |
4821 | size_t total_len = | |
4822 | recon_state.pagelist->length + | |
4823 | mdsc->num_snap_realms * | |
4824 | sizeof(struct ceph_mds_snaprealm_reconnect); | |
4825 | if (recon_state.msg_version >= 4) { | |
4826 | /* number of realms */ | |
4827 | total_len += sizeof(u32); | |
4828 | /* version, compat_version and struct_len */ | |
4829 | total_len += mdsc->num_snap_realms * | |
4830 | (2 * sizeof(u8) + sizeof(u32)); | |
4831 | } | |
4832 | if (total_len > RECONNECT_MAX_SIZE) { | |
4833 | if (!recon_state.allow_multi) { | |
4834 | err = -ENOSPC; | |
4835 | goto fail; | |
4836 | } | |
4837 | if (recon_state.nr_caps) { | |
4838 | err = send_reconnect_partial(&recon_state); | |
4839 | if (err) | |
4840 | goto fail; | |
4841 | } | |
4842 | recon_state.msg_version = 5; | |
4843 | } | |
2f2dc053 | 4844 | } |
2f2dc053 | 4845 | |
81c5a148 YZ |
4846 | err = encode_snap_realms(mdsc, &recon_state); |
4847 | if (err < 0) | |
4848 | goto fail; | |
4849 | ||
4850 | if (recon_state.msg_version >= 5) { | |
4851 | err = ceph_pagelist_encode_8(recon_state.pagelist, 0); | |
4852 | if (err < 0) | |
4853 | goto fail; | |
4854 | } | |
44c99757 | 4855 | |
81c5a148 YZ |
4856 | if (recon_state.nr_caps || recon_state.nr_realms) { |
4857 | struct page *page = | |
4858 | list_first_entry(&recon_state.pagelist->head, | |
4859 | struct page, lru); | |
44c99757 | 4860 | __le32 *addr = kmap_atomic(page); |
81c5a148 YZ |
4861 | if (recon_state.nr_caps) { |
4862 | WARN_ON(recon_state.nr_realms != mdsc->num_snap_realms); | |
4863 | *addr = cpu_to_le32(recon_state.nr_caps); | |
4864 | } else if (recon_state.msg_version >= 4) { | |
4865 | *(addr + 1) = cpu_to_le32(recon_state.nr_realms); | |
4866 | } | |
44c99757 | 4867 | kunmap_atomic(addr); |
ebf18f47 | 4868 | } |
44c99757 | 4869 | |
81c5a148 YZ |
4870 | reply->hdr.version = cpu_to_le16(recon_state.msg_version); |
4871 | if (recon_state.msg_version >= 4) | |
4872 | reply->hdr.compat_version = cpu_to_le16(4); | |
e548e9b9 | 4873 | |
81c5a148 YZ |
4874 | reply->hdr.data_len = cpu_to_le32(recon_state.pagelist->length); |
4875 | ceph_msg_data_add_pagelist(reply, recon_state.pagelist); | |
e548e9b9 | 4876 | |
2f2dc053 SW |
4877 | ceph_con_send(&session->s_con, reply); |
4878 | ||
9abf82b8 SW |
4879 | mutex_unlock(&session->s_mutex); |
4880 | ||
4881 | mutex_lock(&mdsc->mutex); | |
4882 | __wake_requests(mdsc, &session->s_waiting); | |
4883 | mutex_unlock(&mdsc->mutex); | |
4884 | ||
2f2dc053 | 4885 | up_read(&mdsc->snap_rwsem); |
81c5a148 | 4886 | ceph_pagelist_release(recon_state.pagelist); |
2f2dc053 SW |
4887 | return; |
4888 | ||
93cea5be | 4889 | fail: |
2f2dc053 | 4890 | ceph_msg_put(reply); |
9abf82b8 SW |
4891 | up_read(&mdsc->snap_rwsem); |
4892 | mutex_unlock(&session->s_mutex); | |
93cea5be | 4893 | fail_nomsg: |
81c5a148 | 4894 | ceph_pagelist_release(recon_state.pagelist); |
93cea5be | 4895 | fail_nopagelist: |
38d46409 XL |
4896 | pr_err_client(cl, "error %d preparing reconnect for mds%d\n", |
4897 | err, mds); | |
9abf82b8 | 4898 | return; |
2f2dc053 SW |
4899 | } |
4900 | ||
4901 | ||
4902 | /* | |
4903 | * compare old and new mdsmaps, kicking requests | |
4904 | * and closing out old connections as necessary | |
4905 | * | |
4906 | * called under mdsc->mutex. | |
4907 | */ | |
4908 | static void check_new_map(struct ceph_mds_client *mdsc, | |
4909 | struct ceph_mdsmap *newmap, | |
4910 | struct ceph_mdsmap *oldmap) | |
4911 | { | |
d517b398 | 4912 | int i, j, err; |
2f2dc053 SW |
4913 | int oldstate, newstate; |
4914 | struct ceph_mds_session *s; | |
d517b398 | 4915 | unsigned long targets[DIV_ROUND_UP(CEPH_MAX_MDS, sizeof(unsigned long))] = {0}; |
38d46409 | 4916 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 | 4917 | |
38d46409 | 4918 | doutc(cl, "new %u old %u\n", newmap->m_epoch, oldmap->m_epoch); |
2f2dc053 | 4919 | |
d517b398 XL |
4920 | if (newmap->m_info) { |
4921 | for (i = 0; i < newmap->possible_max_rank; i++) { | |
4922 | for (j = 0; j < newmap->m_info[i].num_export_targets; j++) | |
4923 | set_bit(newmap->m_info[i].export_targets[j], targets); | |
4924 | } | |
4925 | } | |
4926 | ||
b38c9eb4 | 4927 | for (i = 0; i < oldmap->possible_max_rank && i < mdsc->max_sessions; i++) { |
d37b1d99 | 4928 | if (!mdsc->sessions[i]) |
2f2dc053 SW |
4929 | continue; |
4930 | s = mdsc->sessions[i]; | |
4931 | oldstate = ceph_mdsmap_get_state(oldmap, i); | |
4932 | newstate = ceph_mdsmap_get_state(newmap, i); | |
4933 | ||
38d46409 XL |
4934 | doutc(cl, "mds%d state %s%s -> %s%s (session %s)\n", |
4935 | i, ceph_mds_state_name(oldstate), | |
4936 | ceph_mdsmap_is_laggy(oldmap, i) ? " (laggy)" : "", | |
4937 | ceph_mds_state_name(newstate), | |
4938 | ceph_mdsmap_is_laggy(newmap, i) ? " (laggy)" : "", | |
4939 | ceph_session_state_name(s->s_state)); | |
2f2dc053 | 4940 | |
b38c9eb4 | 4941 | if (i >= newmap->possible_max_rank) { |
6f0f597b | 4942 | /* force close session for stopped mds */ |
5b3248c6 | 4943 | ceph_get_mds_session(s); |
6f0f597b YZ |
4944 | __unregister_session(mdsc, s); |
4945 | __wake_requests(mdsc, &s->s_waiting); | |
4946 | mutex_unlock(&mdsc->mutex); | |
2827528d | 4947 | |
6f0f597b YZ |
4948 | mutex_lock(&s->s_mutex); |
4949 | cleanup_session_requests(mdsc, s); | |
4950 | remove_session_caps(s); | |
4951 | mutex_unlock(&s->s_mutex); | |
2827528d | 4952 | |
6f0f597b | 4953 | ceph_put_mds_session(s); |
2827528d | 4954 | |
6f0f597b YZ |
4955 | mutex_lock(&mdsc->mutex); |
4956 | kick_requests(mdsc, i); | |
4957 | continue; | |
4958 | } | |
4959 | ||
4960 | if (memcmp(ceph_mdsmap_get_addr(oldmap, i), | |
4961 | ceph_mdsmap_get_addr(newmap, i), | |
4962 | sizeof(struct ceph_entity_addr))) { | |
4963 | /* just close it */ | |
4964 | mutex_unlock(&mdsc->mutex); | |
4965 | mutex_lock(&s->s_mutex); | |
4966 | mutex_lock(&mdsc->mutex); | |
4967 | ceph_con_close(&s->s_con); | |
4968 | mutex_unlock(&s->s_mutex); | |
4969 | s->s_state = CEPH_MDS_SESSION_RESTARTING; | |
2f2dc053 SW |
4970 | } else if (oldstate == newstate) { |
4971 | continue; /* nothing new with this mds */ | |
4972 | } | |
4973 | ||
4974 | /* | |
4975 | * send reconnect? | |
4976 | */ | |
4977 | if (s->s_state == CEPH_MDS_SESSION_RESTARTING && | |
34b6c855 SW |
4978 | newstate >= CEPH_MDS_STATE_RECONNECT) { |
4979 | mutex_unlock(&mdsc->mutex); | |
d517b398 | 4980 | clear_bit(i, targets); |
34b6c855 SW |
4981 | send_mds_reconnect(mdsc, s); |
4982 | mutex_lock(&mdsc->mutex); | |
4983 | } | |
2f2dc053 SW |
4984 | |
4985 | /* | |
29790f26 | 4986 | * kick request on any mds that has gone active. |
2f2dc053 SW |
4987 | */ |
4988 | if (oldstate < CEPH_MDS_STATE_ACTIVE && | |
4989 | newstate >= CEPH_MDS_STATE_ACTIVE) { | |
29790f26 SW |
4990 | if (oldstate != CEPH_MDS_STATE_CREATING && |
4991 | oldstate != CEPH_MDS_STATE_STARTING) | |
38d46409 XL |
4992 | pr_info_client(cl, "mds%d recovery completed\n", |
4993 | s->s_mds); | |
29790f26 | 4994 | kick_requests(mdsc, i); |
ea8412b2 | 4995 | mutex_unlock(&mdsc->mutex); |
829ad4db | 4996 | mutex_lock(&s->s_mutex); |
ea8412b2 | 4997 | mutex_lock(&mdsc->mutex); |
2f2dc053 | 4998 | ceph_kick_flushing_caps(mdsc, s); |
829ad4db | 4999 | mutex_unlock(&s->s_mutex); |
d2f8bb27 | 5000 | wake_up_session_caps(s, RECONNECT); |
2f2dc053 SW |
5001 | } |
5002 | } | |
cb170a22 | 5003 | |
d517b398 XL |
5004 | /* |
5005 | * Only open and reconnect sessions that don't exist yet. | |
5006 | */ | |
5007 | for (i = 0; i < newmap->possible_max_rank; i++) { | |
5008 | /* | |
5009 | * In case the import MDS is crashed just after | |
5010 | * the EImportStart journal is flushed, so when | |
5011 | * a standby MDS takes over it and is replaying | |
5012 | * the EImportStart journal the new MDS daemon | |
5013 | * will wait the client to reconnect it, but the | |
5014 | * client may never register/open the session yet. | |
5015 | * | |
5016 | * Will try to reconnect that MDS daemon if the | |
5017 | * rank number is in the export targets array and | |
5018 | * is the up:reconnect state. | |
5019 | */ | |
5020 | newstate = ceph_mdsmap_get_state(newmap, i); | |
5021 | if (!test_bit(i, targets) || newstate != CEPH_MDS_STATE_RECONNECT) | |
5022 | continue; | |
5023 | ||
5024 | /* | |
5025 | * The session maybe registered and opened by some | |
5026 | * requests which were choosing random MDSes during | |
5027 | * the mdsc->mutex's unlock/lock gap below in rare | |
5028 | * case. But the related MDS daemon will just queue | |
5029 | * that requests and be still waiting for the client's | |
5030 | * reconnection request in up:reconnect state. | |
5031 | */ | |
5032 | s = __ceph_lookup_mds_session(mdsc, i); | |
5033 | if (likely(!s)) { | |
5034 | s = __open_export_target_session(mdsc, i); | |
5035 | if (IS_ERR(s)) { | |
5036 | err = PTR_ERR(s); | |
38d46409 XL |
5037 | pr_err_client(cl, |
5038 | "failed to open export target session, err %d\n", | |
5039 | err); | |
d517b398 XL |
5040 | continue; |
5041 | } | |
5042 | } | |
38d46409 | 5043 | doutc(cl, "send reconnect to export target mds.%d\n", i); |
d517b398 XL |
5044 | mutex_unlock(&mdsc->mutex); |
5045 | send_mds_reconnect(mdsc, s); | |
5046 | ceph_put_mds_session(s); | |
5047 | mutex_lock(&mdsc->mutex); | |
5048 | } | |
5049 | ||
b38c9eb4 | 5050 | for (i = 0; i < newmap->possible_max_rank && i < mdsc->max_sessions; i++) { |
cb170a22 SW |
5051 | s = mdsc->sessions[i]; |
5052 | if (!s) | |
5053 | continue; | |
5054 | if (!ceph_mdsmap_is_laggy(newmap, i)) | |
5055 | continue; | |
5056 | if (s->s_state == CEPH_MDS_SESSION_OPEN || | |
5057 | s->s_state == CEPH_MDS_SESSION_HUNG || | |
5058 | s->s_state == CEPH_MDS_SESSION_CLOSING) { | |
38d46409 | 5059 | doutc(cl, " connecting to export targets of laggy mds%d\n", i); |
cb170a22 SW |
5060 | __open_export_target_sessions(mdsc, s); |
5061 | } | |
5062 | } | |
2f2dc053 SW |
5063 | } |
5064 | ||
5065 | ||
5066 | ||
5067 | /* | |
5068 | * leases | |
5069 | */ | |
5070 | ||
5071 | /* | |
5072 | * caller must hold session s_mutex, dentry->d_lock | |
5073 | */ | |
5074 | void __ceph_mdsc_drop_dentry_lease(struct dentry *dentry) | |
5075 | { | |
5076 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
5077 | ||
5078 | ceph_put_mds_session(di->lease_session); | |
5079 | di->lease_session = NULL; | |
5080 | } | |
5081 | ||
2600d2dd SW |
5082 | static void handle_lease(struct ceph_mds_client *mdsc, |
5083 | struct ceph_mds_session *session, | |
5084 | struct ceph_msg *msg) | |
2f2dc053 | 5085 | { |
38d46409 | 5086 | struct ceph_client *cl = mdsc->fsc->client; |
3d14c5d2 | 5087 | struct super_block *sb = mdsc->fsc->sb; |
2f2dc053 | 5088 | struct inode *inode; |
2f2dc053 SW |
5089 | struct dentry *parent, *dentry; |
5090 | struct ceph_dentry_info *di; | |
2600d2dd | 5091 | int mds = session->s_mds; |
2f2dc053 | 5092 | struct ceph_mds_lease *h = msg->front.iov_base; |
1e5ea23d | 5093 | u32 seq; |
2f2dc053 | 5094 | struct ceph_vino vino; |
2f2dc053 SW |
5095 | struct qstr dname; |
5096 | int release = 0; | |
5097 | ||
38d46409 | 5098 | doutc(cl, "from mds%d\n", mds); |
2f2dc053 | 5099 | |
e3dfcab2 XL |
5100 | if (!ceph_inc_mds_stopping_blocker(mdsc, session)) |
5101 | return; | |
5102 | ||
2f2dc053 SW |
5103 | /* decode */ |
5104 | if (msg->front.iov_len < sizeof(*h) + sizeof(u32)) | |
5105 | goto bad; | |
5106 | vino.ino = le64_to_cpu(h->ino); | |
5107 | vino.snap = CEPH_NOSNAP; | |
1e5ea23d | 5108 | seq = le32_to_cpu(h->seq); |
0fcf6c02 YZ |
5109 | dname.len = get_unaligned_le32(h + 1); |
5110 | if (msg->front.iov_len < sizeof(*h) + sizeof(u32) + dname.len) | |
2f2dc053 | 5111 | goto bad; |
0fcf6c02 | 5112 | dname.name = (void *)(h + 1) + sizeof(u32); |
2f2dc053 | 5113 | |
2f2dc053 SW |
5114 | /* lookup inode */ |
5115 | inode = ceph_find_inode(sb, vino); | |
38d46409 XL |
5116 | doutc(cl, "%s, ino %llx %p %.*s\n", ceph_lease_op_name(h->action), |
5117 | vino.ino, inode, dname.len, dname.name); | |
6cd3bcad YZ |
5118 | |
5119 | mutex_lock(&session->s_mutex); | |
d37b1d99 | 5120 | if (!inode) { |
38d46409 | 5121 | doutc(cl, "no inode %llx\n", vino.ino); |
2f2dc053 SW |
5122 | goto release; |
5123 | } | |
2f2dc053 SW |
5124 | |
5125 | /* dentry */ | |
5126 | parent = d_find_alias(inode); | |
5127 | if (!parent) { | |
38d46409 | 5128 | doutc(cl, "no parent dentry on inode %p\n", inode); |
2f2dc053 SW |
5129 | WARN_ON(1); |
5130 | goto release; /* hrm... */ | |
5131 | } | |
8387ff25 | 5132 | dname.hash = full_name_hash(parent, dname.name, dname.len); |
2f2dc053 SW |
5133 | dentry = d_lookup(parent, &dname); |
5134 | dput(parent); | |
5135 | if (!dentry) | |
5136 | goto release; | |
5137 | ||
5138 | spin_lock(&dentry->d_lock); | |
5139 | di = ceph_dentry(dentry); | |
5140 | switch (h->action) { | |
5141 | case CEPH_MDS_LEASE_REVOKE: | |
3d8eb7a9 | 5142 | if (di->lease_session == session) { |
1e5ea23d SW |
5143 | if (ceph_seq_cmp(di->lease_seq, seq) > 0) |
5144 | h->seq = cpu_to_le32(di->lease_seq); | |
2f2dc053 SW |
5145 | __ceph_mdsc_drop_dentry_lease(dentry); |
5146 | } | |
5147 | release = 1; | |
5148 | break; | |
5149 | ||
5150 | case CEPH_MDS_LEASE_RENEW: | |
3d8eb7a9 | 5151 | if (di->lease_session == session && |
52d60f8e | 5152 | di->lease_gen == atomic_read(&session->s_cap_gen) && |
2f2dc053 SW |
5153 | di->lease_renew_from && |
5154 | di->lease_renew_after == 0) { | |
5155 | unsigned long duration = | |
3563dbdd | 5156 | msecs_to_jiffies(le32_to_cpu(h->duration_ms)); |
2f2dc053 | 5157 | |
1e5ea23d | 5158 | di->lease_seq = seq; |
9b16f03c | 5159 | di->time = di->lease_renew_from + duration; |
2f2dc053 SW |
5160 | di->lease_renew_after = di->lease_renew_from + |
5161 | (duration >> 1); | |
5162 | di->lease_renew_from = 0; | |
5163 | } | |
5164 | break; | |
5165 | } | |
5166 | spin_unlock(&dentry->d_lock); | |
5167 | dput(dentry); | |
5168 | ||
5169 | if (!release) | |
5170 | goto out; | |
5171 | ||
5172 | release: | |
5173 | /* let's just reuse the same message */ | |
5174 | h->action = CEPH_MDS_LEASE_REVOKE_ACK; | |
5175 | ceph_msg_get(msg); | |
5176 | ceph_con_send(&session->s_con, msg); | |
5177 | ||
5178 | out: | |
2f2dc053 | 5179 | mutex_unlock(&session->s_mutex); |
23c2c76e | 5180 | iput(inode); |
e3dfcab2 XL |
5181 | |
5182 | ceph_dec_mds_stopping_blocker(mdsc); | |
2f2dc053 SW |
5183 | return; |
5184 | ||
5185 | bad: | |
e3dfcab2 XL |
5186 | ceph_dec_mds_stopping_blocker(mdsc); |
5187 | ||
38d46409 | 5188 | pr_err_client(cl, "corrupt lease message\n"); |
9ec7cab1 | 5189 | ceph_msg_dump(msg); |
2f2dc053 SW |
5190 | } |
5191 | ||
5192 | void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session, | |
2f2dc053 SW |
5193 | struct dentry *dentry, char action, |
5194 | u32 seq) | |
5195 | { | |
38d46409 | 5196 | struct ceph_client *cl = session->s_mdsc->fsc->client; |
2f2dc053 SW |
5197 | struct ceph_msg *msg; |
5198 | struct ceph_mds_lease *lease; | |
8f2a98ef YZ |
5199 | struct inode *dir; |
5200 | int len = sizeof(*lease) + sizeof(u32) + NAME_MAX; | |
2f2dc053 | 5201 | |
38d46409 XL |
5202 | doutc(cl, "identry %p %s to mds%d\n", dentry, ceph_lease_op_name(action), |
5203 | session->s_mds); | |
2f2dc053 | 5204 | |
b61c2763 | 5205 | msg = ceph_msg_new(CEPH_MSG_CLIENT_LEASE, len, GFP_NOFS, false); |
a79832f2 | 5206 | if (!msg) |
2f2dc053 SW |
5207 | return; |
5208 | lease = msg->front.iov_base; | |
5209 | lease->action = action; | |
2f2dc053 | 5210 | lease->seq = cpu_to_le32(seq); |
2f2dc053 | 5211 | |
8f2a98ef YZ |
5212 | spin_lock(&dentry->d_lock); |
5213 | dir = d_inode(dentry->d_parent); | |
5214 | lease->ino = cpu_to_le64(ceph_ino(dir)); | |
5215 | lease->first = lease->last = cpu_to_le64(ceph_snap(dir)); | |
5216 | ||
5217 | put_unaligned_le32(dentry->d_name.len, lease + 1); | |
5218 | memcpy((void *)(lease + 1) + 4, | |
5219 | dentry->d_name.name, dentry->d_name.len); | |
5220 | spin_unlock(&dentry->d_lock); | |
2f2dc053 SW |
5221 | |
5222 | ceph_con_send(&session->s_con, msg); | |
5223 | } | |
5224 | ||
2f2dc053 | 5225 | /* |
59b312f3 | 5226 | * lock unlock the session, to wait ongoing session activities |
2f2dc053 | 5227 | */ |
59b312f3 | 5228 | static void lock_unlock_session(struct ceph_mds_session *s) |
2f2dc053 | 5229 | { |
59b312f3 XL |
5230 | mutex_lock(&s->s_mutex); |
5231 | mutex_unlock(&s->s_mutex); | |
2f2dc053 SW |
5232 | } |
5233 | ||
131d7eb4 YZ |
5234 | static void maybe_recover_session(struct ceph_mds_client *mdsc) |
5235 | { | |
38d46409 | 5236 | struct ceph_client *cl = mdsc->fsc->client; |
131d7eb4 YZ |
5237 | struct ceph_fs_client *fsc = mdsc->fsc; |
5238 | ||
5239 | if (!ceph_test_mount_opt(fsc, CLEANRECOVER)) | |
5240 | return; | |
2f2dc053 | 5241 | |
131d7eb4 YZ |
5242 | if (READ_ONCE(fsc->mount_state) != CEPH_MOUNT_MOUNTED) |
5243 | return; | |
5244 | ||
0b98acd6 | 5245 | if (!READ_ONCE(fsc->blocklisted)) |
131d7eb4 YZ |
5246 | return; |
5247 | ||
38d46409 | 5248 | pr_info_client(cl, "auto reconnect after blocklisted\n"); |
131d7eb4 YZ |
5249 | ceph_force_reconnect(fsc->sb); |
5250 | } | |
2f2dc053 | 5251 | |
3e699bd8 XL |
5252 | bool check_session_state(struct ceph_mds_session *s) |
5253 | { | |
38d46409 XL |
5254 | struct ceph_client *cl = s->s_mdsc->fsc->client; |
5255 | ||
62575e27 JL |
5256 | switch (s->s_state) { |
5257 | case CEPH_MDS_SESSION_OPEN: | |
5258 | if (s->s_ttl && time_after(jiffies, s->s_ttl)) { | |
3e699bd8 | 5259 | s->s_state = CEPH_MDS_SESSION_HUNG; |
38d46409 | 5260 | pr_info_client(cl, "mds%d hung\n", s->s_mds); |
3e699bd8 | 5261 | } |
62575e27 JL |
5262 | break; |
5263 | case CEPH_MDS_SESSION_CLOSING: | |
62575e27 JL |
5264 | case CEPH_MDS_SESSION_NEW: |
5265 | case CEPH_MDS_SESSION_RESTARTING: | |
5266 | case CEPH_MDS_SESSION_CLOSED: | |
5267 | case CEPH_MDS_SESSION_REJECTED: | |
3e699bd8 | 5268 | return false; |
62575e27 | 5269 | } |
3e699bd8 XL |
5270 | |
5271 | return true; | |
5272 | } | |
5273 | ||
62575e27 JL |
5274 | /* |
5275 | * If the sequence is incremented while we're waiting on a REQUEST_CLOSE reply, | |
5276 | * then we need to retransmit that request. | |
5277 | */ | |
5278 | void inc_session_sequence(struct ceph_mds_session *s) | |
5279 | { | |
38d46409 XL |
5280 | struct ceph_client *cl = s->s_mdsc->fsc->client; |
5281 | ||
62575e27 JL |
5282 | lockdep_assert_held(&s->s_mutex); |
5283 | ||
5284 | s->s_seq++; | |
5285 | ||
5286 | if (s->s_state == CEPH_MDS_SESSION_CLOSING) { | |
5287 | int ret; | |
5288 | ||
38d46409 | 5289 | doutc(cl, "resending session close request for mds%d\n", s->s_mds); |
62575e27 JL |
5290 | ret = request_close_session(s); |
5291 | if (ret < 0) | |
38d46409 XL |
5292 | pr_err_client(cl, "unable to close session to mds%d: %d\n", |
5293 | s->s_mds, ret); | |
62575e27 JL |
5294 | } |
5295 | } | |
5296 | ||
2f2dc053 | 5297 | /* |
bf2ba432 LH |
5298 | * delayed work -- periodically trim expired leases, renew caps with mds. If |
5299 | * the @delay parameter is set to 0 or if it's more than 5 secs, the default | |
5300 | * workqueue delay value of 5 secs will be used. | |
2f2dc053 | 5301 | */ |
bf2ba432 | 5302 | static void schedule_delayed(struct ceph_mds_client *mdsc, unsigned long delay) |
2f2dc053 | 5303 | { |
bf2ba432 LH |
5304 | unsigned long max_delay = HZ * 5; |
5305 | ||
5306 | /* 5 secs default delay */ | |
5307 | if (!delay || (delay > max_delay)) | |
5308 | delay = max_delay; | |
5309 | schedule_delayed_work(&mdsc->delayed_work, | |
5310 | round_jiffies_relative(delay)); | |
2f2dc053 SW |
5311 | } |
5312 | ||
5313 | static void delayed_work(struct work_struct *work) | |
5314 | { | |
2f2dc053 SW |
5315 | struct ceph_mds_client *mdsc = |
5316 | container_of(work, struct ceph_mds_client, delayed_work.work); | |
bf2ba432 | 5317 | unsigned long delay; |
2f2dc053 SW |
5318 | int renew_interval; |
5319 | int renew_caps; | |
bf2ba432 | 5320 | int i; |
2f2dc053 | 5321 | |
38d46409 | 5322 | doutc(mdsc->fsc->client, "mdsc delayed_work\n"); |
75c9627e | 5323 | |
e7e607bd | 5324 | if (mdsc->stopping >= CEPH_MDSC_STOPPING_FLUSHED) |
fa996773 XL |
5325 | return; |
5326 | ||
2f2dc053 SW |
5327 | mutex_lock(&mdsc->mutex); |
5328 | renew_interval = mdsc->mdsmap->m_session_timeout >> 2; | |
5329 | renew_caps = time_after_eq(jiffies, HZ*renew_interval + | |
5330 | mdsc->last_renew_caps); | |
5331 | if (renew_caps) | |
5332 | mdsc->last_renew_caps = jiffies; | |
5333 | ||
5334 | for (i = 0; i < mdsc->max_sessions; i++) { | |
5335 | struct ceph_mds_session *s = __ceph_lookup_mds_session(mdsc, i); | |
d37b1d99 | 5336 | if (!s) |
2f2dc053 | 5337 | continue; |
3e699bd8 XL |
5338 | |
5339 | if (!check_session_state(s)) { | |
2f2dc053 SW |
5340 | ceph_put_mds_session(s); |
5341 | continue; | |
5342 | } | |
5343 | mutex_unlock(&mdsc->mutex); | |
5344 | ||
5345 | mutex_lock(&s->s_mutex); | |
5346 | if (renew_caps) | |
5347 | send_renew_caps(mdsc, s); | |
5348 | else | |
5349 | ceph_con_keepalive(&s->s_con); | |
aab53dd9 SW |
5350 | if (s->s_state == CEPH_MDS_SESSION_OPEN || |
5351 | s->s_state == CEPH_MDS_SESSION_HUNG) | |
3d7ded4d | 5352 | ceph_send_cap_releases(mdsc, s); |
2f2dc053 SW |
5353 | mutex_unlock(&s->s_mutex); |
5354 | ceph_put_mds_session(s); | |
5355 | ||
5356 | mutex_lock(&mdsc->mutex); | |
5357 | } | |
5358 | mutex_unlock(&mdsc->mutex); | |
5359 | ||
bf2ba432 | 5360 | delay = ceph_check_delayed_caps(mdsc); |
37c4efc1 YZ |
5361 | |
5362 | ceph_queue_cap_reclaim_work(mdsc); | |
5363 | ||
5364 | ceph_trim_snapid_map(mdsc); | |
5365 | ||
131d7eb4 YZ |
5366 | maybe_recover_session(mdsc); |
5367 | ||
bf2ba432 | 5368 | schedule_delayed(mdsc, delay); |
2f2dc053 SW |
5369 | } |
5370 | ||
3d14c5d2 | 5371 | int ceph_mdsc_init(struct ceph_fs_client *fsc) |
2f2dc053 | 5372 | |
2f2dc053 | 5373 | { |
3d14c5d2 | 5374 | struct ceph_mds_client *mdsc; |
f9009efa | 5375 | int err; |
3d14c5d2 YS |
5376 | |
5377 | mdsc = kzalloc(sizeof(struct ceph_mds_client), GFP_NOFS); | |
5378 | if (!mdsc) | |
5379 | return -ENOMEM; | |
5380 | mdsc->fsc = fsc; | |
2f2dc053 SW |
5381 | mutex_init(&mdsc->mutex); |
5382 | mdsc->mdsmap = kzalloc(sizeof(*mdsc->mdsmap), GFP_NOFS); | |
d37b1d99 | 5383 | if (!mdsc->mdsmap) { |
f9009efa XL |
5384 | err = -ENOMEM; |
5385 | goto err_mdsc; | |
fb3101b6 | 5386 | } |
2d06eeb8 | 5387 | |
2f2dc053 | 5388 | init_completion(&mdsc->safe_umount_waiters); |
e3dfcab2 XL |
5389 | spin_lock_init(&mdsc->stopping_lock); |
5390 | atomic_set(&mdsc->stopping_blockers, 0); | |
5391 | init_completion(&mdsc->stopping_waiter); | |
f3c60c59 | 5392 | init_waitqueue_head(&mdsc->session_close_wq); |
2f2dc053 | 5393 | INIT_LIST_HEAD(&mdsc->waiting_for_map); |
0c44a8e0 LH |
5394 | mdsc->quotarealms_inodes = RB_ROOT; |
5395 | mutex_init(&mdsc->quotarealms_inodes_mutex); | |
2f2dc053 | 5396 | init_rwsem(&mdsc->snap_rwsem); |
a105f00c | 5397 | mdsc->snap_realms = RB_ROOT; |
2f2dc053 SW |
5398 | INIT_LIST_HEAD(&mdsc->snap_empty); |
5399 | spin_lock_init(&mdsc->snap_empty_lock); | |
44ca18f2 | 5400 | mdsc->request_tree = RB_ROOT; |
2f2dc053 SW |
5401 | INIT_DELAYED_WORK(&mdsc->delayed_work, delayed_work); |
5402 | mdsc->last_renew_caps = jiffies; | |
5403 | INIT_LIST_HEAD(&mdsc->cap_delay_list); | |
3a3430af | 5404 | INIT_LIST_HEAD(&mdsc->cap_wait_list); |
2f2dc053 | 5405 | spin_lock_init(&mdsc->cap_delay_lock); |
dbc347ef XL |
5406 | INIT_LIST_HEAD(&mdsc->cap_unlink_delay_list); |
5407 | spin_lock_init(&mdsc->cap_unlink_delay_lock); | |
2f2dc053 SW |
5408 | INIT_LIST_HEAD(&mdsc->snap_flush_list); |
5409 | spin_lock_init(&mdsc->snap_flush_lock); | |
553adfd9 | 5410 | mdsc->last_cap_flush_tid = 1; |
e4500b5e | 5411 | INIT_LIST_HEAD(&mdsc->cap_flush_list); |
db354052 | 5412 | INIT_LIST_HEAD(&mdsc->cap_dirty_migrating); |
2f2dc053 SW |
5413 | spin_lock_init(&mdsc->cap_dirty_lock); |
5414 | init_waitqueue_head(&mdsc->cap_flushing_wq); | |
37c4efc1 | 5415 | INIT_WORK(&mdsc->cap_reclaim_work, ceph_cap_reclaim_work); |
dbc347ef | 5416 | INIT_WORK(&mdsc->cap_unlink_work, ceph_cap_unlink_work); |
f9009efa XL |
5417 | err = ceph_metric_init(&mdsc->metric); |
5418 | if (err) | |
5419 | goto err_mdsmap; | |
37c4efc1 YZ |
5420 | |
5421 | spin_lock_init(&mdsc->dentry_list_lock); | |
5422 | INIT_LIST_HEAD(&mdsc->dentry_leases); | |
5423 | INIT_LIST_HEAD(&mdsc->dentry_dir_leases); | |
2d06eeb8 | 5424 | |
37151668 | 5425 | ceph_caps_init(mdsc); |
fe33032d | 5426 | ceph_adjust_caps_max_min(mdsc, fsc->mount_options); |
37151668 | 5427 | |
75c9627e YZ |
5428 | spin_lock_init(&mdsc->snapid_map_lock); |
5429 | mdsc->snapid_map_tree = RB_ROOT; | |
5430 | INIT_LIST_HEAD(&mdsc->snapid_map_lru); | |
5431 | ||
10183a69 YZ |
5432 | init_rwsem(&mdsc->pool_perm_rwsem); |
5433 | mdsc->pool_perm_tree = RB_ROOT; | |
5434 | ||
dfeb84d4 YZ |
5435 | strscpy(mdsc->nodename, utsname()->nodename, |
5436 | sizeof(mdsc->nodename)); | |
a7caa88f XL |
5437 | |
5438 | fsc->mdsc = mdsc; | |
5f44f142 | 5439 | return 0; |
f9009efa XL |
5440 | |
5441 | err_mdsmap: | |
5442 | kfree(mdsc->mdsmap); | |
5443 | err_mdsc: | |
5444 | kfree(mdsc); | |
5445 | return err; | |
2f2dc053 SW |
5446 | } |
5447 | ||
5448 | /* | |
5449 | * Wait for safe replies on open mds requests. If we time out, drop | |
5450 | * all requests from the tree to avoid dangling dentry refs. | |
5451 | */ | |
5452 | static void wait_requests(struct ceph_mds_client *mdsc) | |
5453 | { | |
38d46409 | 5454 | struct ceph_client *cl = mdsc->fsc->client; |
a319bf56 | 5455 | struct ceph_options *opts = mdsc->fsc->client->options; |
2f2dc053 | 5456 | struct ceph_mds_request *req; |
2f2dc053 SW |
5457 | |
5458 | mutex_lock(&mdsc->mutex); | |
44ca18f2 | 5459 | if (__get_oldest_req(mdsc)) { |
2f2dc053 | 5460 | mutex_unlock(&mdsc->mutex); |
44ca18f2 | 5461 | |
38d46409 | 5462 | doutc(cl, "waiting for requests\n"); |
2f2dc053 | 5463 | wait_for_completion_timeout(&mdsc->safe_umount_waiters, |
a319bf56 | 5464 | ceph_timeout_jiffies(opts->mount_timeout)); |
2f2dc053 SW |
5465 | |
5466 | /* tear down remaining requests */ | |
44ca18f2 SW |
5467 | mutex_lock(&mdsc->mutex); |
5468 | while ((req = __get_oldest_req(mdsc))) { | |
38d46409 | 5469 | doutc(cl, "timed out on tid %llu\n", req->r_tid); |
428138c9 | 5470 | list_del_init(&req->r_wait); |
44ca18f2 | 5471 | __unregister_request(mdsc, req); |
2f2dc053 SW |
5472 | } |
5473 | } | |
5474 | mutex_unlock(&mdsc->mutex); | |
38d46409 | 5475 | doutc(cl, "done\n"); |
2f2dc053 SW |
5476 | } |
5477 | ||
d095559c XL |
5478 | void send_flush_mdlog(struct ceph_mds_session *s) |
5479 | { | |
38d46409 | 5480 | struct ceph_client *cl = s->s_mdsc->fsc->client; |
d095559c XL |
5481 | struct ceph_msg *msg; |
5482 | ||
5483 | /* | |
5484 | * Pre-luminous MDS crashes when it sees an unknown session request | |
5485 | */ | |
5486 | if (!CEPH_HAVE_FEATURE(s->s_con.peer_features, SERVER_LUMINOUS)) | |
5487 | return; | |
5488 | ||
5489 | mutex_lock(&s->s_mutex); | |
38d46409 XL |
5490 | doutc(cl, "request mdlog flush to mds%d (%s)s seq %lld\n", |
5491 | s->s_mds, ceph_session_state_name(s->s_state), s->s_seq); | |
d095559c XL |
5492 | msg = ceph_create_session_msg(CEPH_SESSION_REQUEST_FLUSH_MDLOG, |
5493 | s->s_seq); | |
5494 | if (!msg) { | |
38d46409 XL |
5495 | pr_err_client(cl, "failed to request mdlog flush to mds%d (%s) seq %lld\n", |
5496 | s->s_mds, ceph_session_state_name(s->s_state), s->s_seq); | |
d095559c XL |
5497 | } else { |
5498 | ceph_con_send(&s->s_con, msg); | |
5499 | } | |
5500 | mutex_unlock(&s->s_mutex); | |
5501 | } | |
5502 | ||
2f2dc053 SW |
5503 | /* |
5504 | * called before mount is ro, and before dentries are torn down. | |
5505 | * (hmm, does this still race with new lookups?) | |
5506 | */ | |
5507 | void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc) | |
5508 | { | |
38d46409 | 5509 | doutc(mdsc->fsc->client, "begin\n"); |
e7e607bd | 5510 | mdsc->stopping = CEPH_MDSC_STOPPING_BEGIN; |
2f2dc053 | 5511 | |
d095559c | 5512 | ceph_mdsc_iterate_sessions(mdsc, send_flush_mdlog, true); |
59b312f3 | 5513 | ceph_mdsc_iterate_sessions(mdsc, lock_unlock_session, false); |
afcdaea3 | 5514 | ceph_flush_dirty_caps(mdsc); |
2f2dc053 | 5515 | wait_requests(mdsc); |
17c688c3 SW |
5516 | |
5517 | /* | |
5518 | * wait for reply handlers to drop their request refs and | |
5519 | * their inode/dcache refs | |
5520 | */ | |
5521 | ceph_msgr_flush(); | |
0c44a8e0 LH |
5522 | |
5523 | ceph_cleanup_quotarealms_inodes(mdsc); | |
38d46409 | 5524 | doutc(mdsc->fsc->client, "done\n"); |
2f2dc053 SW |
5525 | } |
5526 | ||
5527 | /* | |
1b2ba3c5 | 5528 | * flush the mdlog and wait for all write mds requests to flush. |
2f2dc053 | 5529 | */ |
1b2ba3c5 XL |
5530 | static void flush_mdlog_and_wait_mdsc_unsafe_requests(struct ceph_mds_client *mdsc, |
5531 | u64 want_tid) | |
2f2dc053 | 5532 | { |
38d46409 | 5533 | struct ceph_client *cl = mdsc->fsc->client; |
80fc7314 | 5534 | struct ceph_mds_request *req = NULL, *nextreq; |
1b2ba3c5 | 5535 | struct ceph_mds_session *last_session = NULL; |
44ca18f2 | 5536 | struct rb_node *n; |
2f2dc053 SW |
5537 | |
5538 | mutex_lock(&mdsc->mutex); | |
38d46409 | 5539 | doutc(cl, "want %lld\n", want_tid); |
80fc7314 | 5540 | restart: |
44ca18f2 SW |
5541 | req = __get_oldest_req(mdsc); |
5542 | while (req && req->r_tid <= want_tid) { | |
80fc7314 SW |
5543 | /* find next request */ |
5544 | n = rb_next(&req->r_node); | |
5545 | if (n) | |
5546 | nextreq = rb_entry(n, struct ceph_mds_request, r_node); | |
5547 | else | |
5548 | nextreq = NULL; | |
e8a7b8b1 YZ |
5549 | if (req->r_op != CEPH_MDS_OP_SETFILELOCK && |
5550 | (req->r_op & CEPH_MDS_OP_WRITE)) { | |
1b2ba3c5 XL |
5551 | struct ceph_mds_session *s = req->r_session; |
5552 | ||
5553 | if (!s) { | |
5554 | req = nextreq; | |
5555 | continue; | |
5556 | } | |
5557 | ||
44ca18f2 SW |
5558 | /* write op */ |
5559 | ceph_mdsc_get_request(req); | |
80fc7314 SW |
5560 | if (nextreq) |
5561 | ceph_mdsc_get_request(nextreq); | |
1b2ba3c5 | 5562 | s = ceph_get_mds_session(s); |
44ca18f2 | 5563 | mutex_unlock(&mdsc->mutex); |
1b2ba3c5 XL |
5564 | |
5565 | /* send flush mdlog request to MDS */ | |
5566 | if (last_session != s) { | |
5567 | send_flush_mdlog(s); | |
5568 | ceph_put_mds_session(last_session); | |
5569 | last_session = s; | |
5570 | } else { | |
5571 | ceph_put_mds_session(s); | |
5572 | } | |
38d46409 XL |
5573 | doutc(cl, "wait on %llu (want %llu)\n", |
5574 | req->r_tid, want_tid); | |
44ca18f2 | 5575 | wait_for_completion(&req->r_safe_completion); |
1b2ba3c5 | 5576 | |
44ca18f2 | 5577 | mutex_lock(&mdsc->mutex); |
44ca18f2 | 5578 | ceph_mdsc_put_request(req); |
80fc7314 SW |
5579 | if (!nextreq) |
5580 | break; /* next dne before, so we're done! */ | |
5581 | if (RB_EMPTY_NODE(&nextreq->r_node)) { | |
5582 | /* next request was removed from tree */ | |
5583 | ceph_mdsc_put_request(nextreq); | |
5584 | goto restart; | |
5585 | } | |
5586 | ceph_mdsc_put_request(nextreq); /* won't go away */ | |
44ca18f2 | 5587 | } |
80fc7314 | 5588 | req = nextreq; |
2f2dc053 SW |
5589 | } |
5590 | mutex_unlock(&mdsc->mutex); | |
1b2ba3c5 | 5591 | ceph_put_mds_session(last_session); |
38d46409 | 5592 | doutc(cl, "done\n"); |
2f2dc053 SW |
5593 | } |
5594 | ||
5595 | void ceph_mdsc_sync(struct ceph_mds_client *mdsc) | |
5596 | { | |
38d46409 | 5597 | struct ceph_client *cl = mdsc->fsc->client; |
0e294387 | 5598 | u64 want_tid, want_flush; |
2f2dc053 | 5599 | |
50c9132d | 5600 | if (READ_ONCE(mdsc->fsc->mount_state) >= CEPH_MOUNT_SHUTDOWN) |
56b7cf95 SW |
5601 | return; |
5602 | ||
38d46409 | 5603 | doutc(cl, "sync\n"); |
2f2dc053 SW |
5604 | mutex_lock(&mdsc->mutex); |
5605 | want_tid = mdsc->last_tid; | |
2f2dc053 | 5606 | mutex_unlock(&mdsc->mutex); |
2f2dc053 | 5607 | |
afcdaea3 | 5608 | ceph_flush_dirty_caps(mdsc); |
d3383a8e | 5609 | spin_lock(&mdsc->cap_dirty_lock); |
8310b089 | 5610 | want_flush = mdsc->last_cap_flush_tid; |
c8799fc4 YZ |
5611 | if (!list_empty(&mdsc->cap_flush_list)) { |
5612 | struct ceph_cap_flush *cf = | |
5613 | list_last_entry(&mdsc->cap_flush_list, | |
5614 | struct ceph_cap_flush, g_list); | |
5615 | cf->wake = true; | |
5616 | } | |
d3383a8e YZ |
5617 | spin_unlock(&mdsc->cap_dirty_lock); |
5618 | ||
38d46409 | 5619 | doutc(cl, "sync want tid %lld flush_seq %lld\n", want_tid, want_flush); |
2f2dc053 | 5620 | |
1b2ba3c5 | 5621 | flush_mdlog_and_wait_mdsc_unsafe_requests(mdsc, want_tid); |
0e294387 | 5622 | wait_caps_flush(mdsc, want_flush); |
2f2dc053 SW |
5623 | } |
5624 | ||
f3c60c59 SW |
5625 | /* |
5626 | * true if all sessions are closed, or we force unmount | |
5627 | */ | |
fcff415c | 5628 | static bool done_closing_sessions(struct ceph_mds_client *mdsc, int skipped) |
f3c60c59 | 5629 | { |
52953d55 | 5630 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) |
f3c60c59 | 5631 | return true; |
fcff415c | 5632 | return atomic_read(&mdsc->num_sessions) <= skipped; |
f3c60c59 | 5633 | } |
2f2dc053 SW |
5634 | |
5635 | /* | |
a68e564a | 5636 | * called after sb is ro or when metadata corrupted. |
2f2dc053 SW |
5637 | */ |
5638 | void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc) | |
5639 | { | |
a319bf56 | 5640 | struct ceph_options *opts = mdsc->fsc->client->options; |
38d46409 | 5641 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
5642 | struct ceph_mds_session *session; |
5643 | int i; | |
fcff415c | 5644 | int skipped = 0; |
2f2dc053 | 5645 | |
38d46409 | 5646 | doutc(cl, "begin\n"); |
2f2dc053 | 5647 | |
2f2dc053 | 5648 | /* close sessions */ |
f3c60c59 SW |
5649 | mutex_lock(&mdsc->mutex); |
5650 | for (i = 0; i < mdsc->max_sessions; i++) { | |
5651 | session = __ceph_lookup_mds_session(mdsc, i); | |
5652 | if (!session) | |
5653 | continue; | |
2f2dc053 | 5654 | mutex_unlock(&mdsc->mutex); |
f3c60c59 | 5655 | mutex_lock(&session->s_mutex); |
fcff415c YZ |
5656 | if (__close_session(mdsc, session) <= 0) |
5657 | skipped++; | |
f3c60c59 SW |
5658 | mutex_unlock(&session->s_mutex); |
5659 | ceph_put_mds_session(session); | |
2f2dc053 SW |
5660 | mutex_lock(&mdsc->mutex); |
5661 | } | |
f3c60c59 SW |
5662 | mutex_unlock(&mdsc->mutex); |
5663 | ||
38d46409 | 5664 | doutc(cl, "waiting for sessions to close\n"); |
fcff415c YZ |
5665 | wait_event_timeout(mdsc->session_close_wq, |
5666 | done_closing_sessions(mdsc, skipped), | |
a319bf56 | 5667 | ceph_timeout_jiffies(opts->mount_timeout)); |
2f2dc053 SW |
5668 | |
5669 | /* tear down remaining sessions */ | |
f3c60c59 | 5670 | mutex_lock(&mdsc->mutex); |
2f2dc053 SW |
5671 | for (i = 0; i < mdsc->max_sessions; i++) { |
5672 | if (mdsc->sessions[i]) { | |
5b3248c6 | 5673 | session = ceph_get_mds_session(mdsc->sessions[i]); |
2600d2dd | 5674 | __unregister_session(mdsc, session); |
2f2dc053 SW |
5675 | mutex_unlock(&mdsc->mutex); |
5676 | mutex_lock(&session->s_mutex); | |
5677 | remove_session_caps(session); | |
5678 | mutex_unlock(&session->s_mutex); | |
5679 | ceph_put_mds_session(session); | |
5680 | mutex_lock(&mdsc->mutex); | |
5681 | } | |
5682 | } | |
2f2dc053 | 5683 | WARN_ON(!list_empty(&mdsc->cap_delay_list)); |
2f2dc053 SW |
5684 | mutex_unlock(&mdsc->mutex); |
5685 | ||
75c9627e | 5686 | ceph_cleanup_snapid_map(mdsc); |
5ed91587 | 5687 | ceph_cleanup_global_and_empty_realms(mdsc); |
2f2dc053 | 5688 | |
37c4efc1 | 5689 | cancel_work_sync(&mdsc->cap_reclaim_work); |
dbc347ef | 5690 | cancel_work_sync(&mdsc->cap_unlink_work); |
2f2dc053 SW |
5691 | cancel_delayed_work_sync(&mdsc->delayed_work); /* cancel timer */ |
5692 | ||
38d46409 | 5693 | doutc(cl, "done\n"); |
2f2dc053 SW |
5694 | } |
5695 | ||
48fec5d0 YZ |
5696 | void ceph_mdsc_force_umount(struct ceph_mds_client *mdsc) |
5697 | { | |
5698 | struct ceph_mds_session *session; | |
5699 | int mds; | |
5700 | ||
38d46409 | 5701 | doutc(mdsc->fsc->client, "force umount\n"); |
48fec5d0 YZ |
5702 | |
5703 | mutex_lock(&mdsc->mutex); | |
5704 | for (mds = 0; mds < mdsc->max_sessions; mds++) { | |
5705 | session = __ceph_lookup_mds_session(mdsc, mds); | |
5706 | if (!session) | |
5707 | continue; | |
d468e729 YZ |
5708 | |
5709 | if (session->s_state == CEPH_MDS_SESSION_REJECTED) | |
5710 | __unregister_session(mdsc, session); | |
5711 | __wake_requests(mdsc, &session->s_waiting); | |
48fec5d0 | 5712 | mutex_unlock(&mdsc->mutex); |
d468e729 | 5713 | |
48fec5d0 YZ |
5714 | mutex_lock(&session->s_mutex); |
5715 | __close_session(mdsc, session); | |
5716 | if (session->s_state == CEPH_MDS_SESSION_CLOSING) { | |
5717 | cleanup_session_requests(mdsc, session); | |
5718 | remove_session_caps(session); | |
5719 | } | |
5720 | mutex_unlock(&session->s_mutex); | |
5721 | ceph_put_mds_session(session); | |
d468e729 | 5722 | |
48fec5d0 YZ |
5723 | mutex_lock(&mdsc->mutex); |
5724 | kick_requests(mdsc, mds); | |
5725 | } | |
5726 | __wake_requests(mdsc, &mdsc->waiting_for_map); | |
5727 | mutex_unlock(&mdsc->mutex); | |
5728 | } | |
5729 | ||
3d14c5d2 | 5730 | static void ceph_mdsc_stop(struct ceph_mds_client *mdsc) |
2f2dc053 | 5731 | { |
38d46409 | 5732 | doutc(mdsc->fsc->client, "stop\n"); |
fa996773 XL |
5733 | /* |
5734 | * Make sure the delayed work stopped before releasing | |
5735 | * the resources. | |
5736 | * | |
5737 | * Because the cancel_delayed_work_sync() will only | |
5738 | * guarantee that the work finishes executing. But the | |
5739 | * delayed work will re-arm itself again after that. | |
5740 | */ | |
5741 | flush_delayed_work(&mdsc->delayed_work); | |
5742 | ||
2f2dc053 SW |
5743 | if (mdsc->mdsmap) |
5744 | ceph_mdsmap_destroy(mdsc->mdsmap); | |
5745 | kfree(mdsc->sessions); | |
37151668 | 5746 | ceph_caps_finalize(mdsc); |
10183a69 | 5747 | ceph_pool_perm_destroy(mdsc); |
2f2dc053 SW |
5748 | } |
5749 | ||
3d14c5d2 YS |
5750 | void ceph_mdsc_destroy(struct ceph_fs_client *fsc) |
5751 | { | |
5752 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
38d46409 | 5753 | doutc(fsc->client, "%p\n", mdsc); |
ef550f6f | 5754 | |
50c55aec CX |
5755 | if (!mdsc) |
5756 | return; | |
5757 | ||
ef550f6f SW |
5758 | /* flush out any connection work with references to us */ |
5759 | ceph_msgr_flush(); | |
5760 | ||
62a65f36 YZ |
5761 | ceph_mdsc_stop(mdsc); |
5762 | ||
f9009efa XL |
5763 | ceph_metric_destroy(&mdsc->metric); |
5764 | ||
3d14c5d2 YS |
5765 | fsc->mdsc = NULL; |
5766 | kfree(mdsc); | |
38d46409 | 5767 | doutc(fsc->client, "%p done\n", mdsc); |
3d14c5d2 YS |
5768 | } |
5769 | ||
430afbad YZ |
5770 | void ceph_mdsc_handle_fsmap(struct ceph_mds_client *mdsc, struct ceph_msg *msg) |
5771 | { | |
5772 | struct ceph_fs_client *fsc = mdsc->fsc; | |
38d46409 | 5773 | struct ceph_client *cl = fsc->client; |
430afbad YZ |
5774 | const char *mds_namespace = fsc->mount_options->mds_namespace; |
5775 | void *p = msg->front.iov_base; | |
5776 | void *end = p + msg->front.iov_len; | |
5777 | u32 epoch; | |
430afbad YZ |
5778 | u32 num_fs; |
5779 | u32 mount_fscid = (u32)-1; | |
430afbad YZ |
5780 | int err = -EINVAL; |
5781 | ||
5782 | ceph_decode_need(&p, end, sizeof(u32), bad); | |
5783 | epoch = ceph_decode_32(&p); | |
5784 | ||
38d46409 | 5785 | doutc(cl, "epoch %u\n", epoch); |
430afbad | 5786 | |
06a1ad43 JL |
5787 | /* struct_v, struct_cv, map_len, epoch, legacy_client_fscid */ |
5788 | ceph_decode_skip_n(&p, end, 2 + sizeof(u32) * 3, bad); | |
430afbad | 5789 | |
06a1ad43 | 5790 | ceph_decode_32_safe(&p, end, num_fs, bad); |
430afbad YZ |
5791 | while (num_fs-- > 0) { |
5792 | void *info_p, *info_end; | |
5793 | u32 info_len; | |
430afbad YZ |
5794 | u32 fscid, namelen; |
5795 | ||
5796 | ceph_decode_need(&p, end, 2 + sizeof(u32), bad); | |
06a1ad43 | 5797 | p += 2; // info_v, info_cv |
430afbad YZ |
5798 | info_len = ceph_decode_32(&p); |
5799 | ceph_decode_need(&p, end, info_len, bad); | |
5800 | info_p = p; | |
5801 | info_end = p + info_len; | |
5802 | p = info_end; | |
5803 | ||
5804 | ceph_decode_need(&info_p, info_end, sizeof(u32) * 2, bad); | |
5805 | fscid = ceph_decode_32(&info_p); | |
5806 | namelen = ceph_decode_32(&info_p); | |
5807 | ceph_decode_need(&info_p, info_end, namelen, bad); | |
5808 | ||
5809 | if (mds_namespace && | |
5810 | strlen(mds_namespace) == namelen && | |
5811 | !strncmp(mds_namespace, (char *)info_p, namelen)) { | |
5812 | mount_fscid = fscid; | |
5813 | break; | |
5814 | } | |
5815 | } | |
5816 | ||
5817 | ceph_monc_got_map(&fsc->client->monc, CEPH_SUB_FSMAP, epoch); | |
5818 | if (mount_fscid != (u32)-1) { | |
5819 | fsc->client->monc.fs_cluster_id = mount_fscid; | |
5820 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, | |
5821 | 0, true); | |
5822 | ceph_monc_renew_subs(&fsc->client->monc); | |
5823 | } else { | |
5824 | err = -ENOENT; | |
5825 | goto err_out; | |
5826 | } | |
5827 | return; | |
76bd6ec4 | 5828 | |
430afbad | 5829 | bad: |
38d46409 XL |
5830 | pr_err_client(cl, "error decoding fsmap %d. Shutting down mount.\n", |
5831 | err); | |
631ed4b0 | 5832 | ceph_umount_begin(mdsc->fsc->sb); |
8b0da5c5 | 5833 | ceph_msg_dump(msg); |
430afbad YZ |
5834 | err_out: |
5835 | mutex_lock(&mdsc->mutex); | |
76bd6ec4 | 5836 | mdsc->mdsmap_err = err; |
430afbad YZ |
5837 | __wake_requests(mdsc, &mdsc->waiting_for_map); |
5838 | mutex_unlock(&mdsc->mutex); | |
430afbad | 5839 | } |
2f2dc053 SW |
5840 | |
5841 | /* | |
5842 | * handle mds map update. | |
5843 | */ | |
430afbad | 5844 | void ceph_mdsc_handle_mdsmap(struct ceph_mds_client *mdsc, struct ceph_msg *msg) |
2f2dc053 | 5845 | { |
38d46409 | 5846 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
5847 | u32 epoch; |
5848 | u32 maplen; | |
5849 | void *p = msg->front.iov_base; | |
5850 | void *end = p + msg->front.iov_len; | |
5851 | struct ceph_mdsmap *newmap, *oldmap; | |
5852 | struct ceph_fsid fsid; | |
5853 | int err = -EINVAL; | |
5854 | ||
5855 | ceph_decode_need(&p, end, sizeof(fsid)+2*sizeof(u32), bad); | |
5856 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
3d14c5d2 | 5857 | if (ceph_check_fsid(mdsc->fsc->client, &fsid) < 0) |
0743304d | 5858 | return; |
c89136ea SW |
5859 | epoch = ceph_decode_32(&p); |
5860 | maplen = ceph_decode_32(&p); | |
38d46409 | 5861 | doutc(cl, "epoch %u len %d\n", epoch, (int)maplen); |
2f2dc053 SW |
5862 | |
5863 | /* do we need it? */ | |
2f2dc053 SW |
5864 | mutex_lock(&mdsc->mutex); |
5865 | if (mdsc->mdsmap && epoch <= mdsc->mdsmap->m_epoch) { | |
38d46409 | 5866 | doutc(cl, "epoch %u <= our %u\n", epoch, mdsc->mdsmap->m_epoch); |
2f2dc053 SW |
5867 | mutex_unlock(&mdsc->mutex); |
5868 | return; | |
5869 | } | |
5870 | ||
197b7d79 | 5871 | newmap = ceph_mdsmap_decode(mdsc, &p, end, ceph_msgr2(mdsc->fsc->client)); |
2f2dc053 SW |
5872 | if (IS_ERR(newmap)) { |
5873 | err = PTR_ERR(newmap); | |
5874 | goto bad_unlock; | |
5875 | } | |
5876 | ||
5877 | /* swap into place */ | |
5878 | if (mdsc->mdsmap) { | |
5879 | oldmap = mdsc->mdsmap; | |
5880 | mdsc->mdsmap = newmap; | |
5881 | check_new_map(mdsc, newmap, oldmap); | |
5882 | ceph_mdsmap_destroy(oldmap); | |
5883 | } else { | |
5884 | mdsc->mdsmap = newmap; /* first mds map */ | |
5885 | } | |
719784ba CX |
5886 | mdsc->fsc->max_file_size = min((loff_t)mdsc->mdsmap->m_max_file_size, |
5887 | MAX_LFS_FILESIZE); | |
2f2dc053 SW |
5888 | |
5889 | __wake_requests(mdsc, &mdsc->waiting_for_map); | |
82dcabad ID |
5890 | ceph_monc_got_map(&mdsc->fsc->client->monc, CEPH_SUB_MDSMAP, |
5891 | mdsc->mdsmap->m_epoch); | |
2f2dc053 SW |
5892 | |
5893 | mutex_unlock(&mdsc->mutex); | |
bf2ba432 | 5894 | schedule_delayed(mdsc, 0); |
2f2dc053 SW |
5895 | return; |
5896 | ||
5897 | bad_unlock: | |
5898 | mutex_unlock(&mdsc->mutex); | |
5899 | bad: | |
38d46409 XL |
5900 | pr_err_client(cl, "error decoding mdsmap %d. Shutting down mount.\n", |
5901 | err); | |
631ed4b0 | 5902 | ceph_umount_begin(mdsc->fsc->sb); |
8b0da5c5 | 5903 | ceph_msg_dump(msg); |
2f2dc053 SW |
5904 | return; |
5905 | } | |
5906 | ||
4972cf60 | 5907 | static struct ceph_connection *mds_get_con(struct ceph_connection *con) |
2f2dc053 SW |
5908 | { |
5909 | struct ceph_mds_session *s = con->private; | |
5910 | ||
5b3248c6 | 5911 | if (ceph_get_mds_session(s)) |
2f2dc053 | 5912 | return con; |
2f2dc053 SW |
5913 | return NULL; |
5914 | } | |
5915 | ||
4972cf60 | 5916 | static void mds_put_con(struct ceph_connection *con) |
2f2dc053 SW |
5917 | { |
5918 | struct ceph_mds_session *s = con->private; | |
5919 | ||
2f2dc053 SW |
5920 | ceph_put_mds_session(s); |
5921 | } | |
5922 | ||
5923 | /* | |
5924 | * if the client is unresponsive for long enough, the mds will kill | |
5925 | * the session entirely. | |
5926 | */ | |
4972cf60 | 5927 | static void mds_peer_reset(struct ceph_connection *con) |
2f2dc053 SW |
5928 | { |
5929 | struct ceph_mds_session *s = con->private; | |
7e70f0ed | 5930 | struct ceph_mds_client *mdsc = s->s_mdsc; |
2f2dc053 | 5931 | |
38d46409 XL |
5932 | pr_warn_client(mdsc->fsc->client, "mds%d closed our session\n", |
5933 | s->s_mds); | |
cbcb358b XL |
5934 | if (READ_ONCE(mdsc->fsc->mount_state) != CEPH_MOUNT_FENCE_IO && |
5935 | ceph_mdsmap_get_state(mdsc->mdsmap, s->s_mds) >= CEPH_MDS_STATE_RECONNECT) | |
a68e564a | 5936 | send_mds_reconnect(mdsc, s); |
2f2dc053 SW |
5937 | } |
5938 | ||
4972cf60 | 5939 | static void mds_dispatch(struct ceph_connection *con, struct ceph_msg *msg) |
2f2dc053 SW |
5940 | { |
5941 | struct ceph_mds_session *s = con->private; | |
5942 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
38d46409 | 5943 | struct ceph_client *cl = mdsc->fsc->client; |
2f2dc053 SW |
5944 | int type = le16_to_cpu(msg->hdr.type); |
5945 | ||
2600d2dd SW |
5946 | mutex_lock(&mdsc->mutex); |
5947 | if (__verify_registered_session(mdsc, s) < 0) { | |
5948 | mutex_unlock(&mdsc->mutex); | |
5949 | goto out; | |
5950 | } | |
5951 | mutex_unlock(&mdsc->mutex); | |
5952 | ||
2f2dc053 SW |
5953 | switch (type) { |
5954 | case CEPH_MSG_MDS_MAP: | |
430afbad YZ |
5955 | ceph_mdsc_handle_mdsmap(mdsc, msg); |
5956 | break; | |
5957 | case CEPH_MSG_FS_MAP_USER: | |
5958 | ceph_mdsc_handle_fsmap(mdsc, msg); | |
2f2dc053 SW |
5959 | break; |
5960 | case CEPH_MSG_CLIENT_SESSION: | |
5961 | handle_session(s, msg); | |
5962 | break; | |
5963 | case CEPH_MSG_CLIENT_REPLY: | |
5964 | handle_reply(s, msg); | |
5965 | break; | |
5966 | case CEPH_MSG_CLIENT_REQUEST_FORWARD: | |
2600d2dd | 5967 | handle_forward(mdsc, s, msg); |
2f2dc053 SW |
5968 | break; |
5969 | case CEPH_MSG_CLIENT_CAPS: | |
5970 | ceph_handle_caps(s, msg); | |
5971 | break; | |
5972 | case CEPH_MSG_CLIENT_SNAP: | |
2600d2dd | 5973 | ceph_handle_snap(mdsc, s, msg); |
2f2dc053 SW |
5974 | break; |
5975 | case CEPH_MSG_CLIENT_LEASE: | |
2600d2dd | 5976 | handle_lease(mdsc, s, msg); |
2f2dc053 | 5977 | break; |
fb18a575 LH |
5978 | case CEPH_MSG_CLIENT_QUOTA: |
5979 | ceph_handle_quota(mdsc, s, msg); | |
5980 | break; | |
2f2dc053 SW |
5981 | |
5982 | default: | |
38d46409 XL |
5983 | pr_err_client(cl, "received unknown message type %d %s\n", |
5984 | type, ceph_msg_type_name(type)); | |
2f2dc053 | 5985 | } |
2600d2dd | 5986 | out: |
2f2dc053 SW |
5987 | ceph_msg_put(msg); |
5988 | } | |
5989 | ||
4e7a5dcd SW |
5990 | /* |
5991 | * authentication | |
5992 | */ | |
a3530df3 AE |
5993 | |
5994 | /* | |
5995 | * Note: returned pointer is the address of a structure that's | |
5996 | * managed separately. Caller must *not* attempt to free it. | |
5997 | */ | |
4972cf60 ID |
5998 | static struct ceph_auth_handshake * |
5999 | mds_get_authorizer(struct ceph_connection *con, int *proto, int force_new) | |
4e7a5dcd SW |
6000 | { |
6001 | struct ceph_mds_session *s = con->private; | |
6002 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
3d14c5d2 | 6003 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; |
74f1869f | 6004 | struct ceph_auth_handshake *auth = &s->s_auth; |
ce287162 | 6005 | int ret; |
4e7a5dcd | 6006 | |
ce287162 ID |
6007 | ret = __ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_MDS, |
6008 | force_new, proto, NULL, NULL); | |
6009 | if (ret) | |
6010 | return ERR_PTR(ret); | |
74f1869f | 6011 | |
a3530df3 | 6012 | return auth; |
4e7a5dcd SW |
6013 | } |
6014 | ||
4972cf60 | 6015 | static int mds_add_authorizer_challenge(struct ceph_connection *con, |
6daca13d ID |
6016 | void *challenge_buf, int challenge_buf_len) |
6017 | { | |
6018 | struct ceph_mds_session *s = con->private; | |
6019 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
6020 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; | |
6021 | ||
6022 | return ceph_auth_add_authorizer_challenge(ac, s->s_auth.authorizer, | |
6023 | challenge_buf, challenge_buf_len); | |
6024 | } | |
4e7a5dcd | 6025 | |
4972cf60 | 6026 | static int mds_verify_authorizer_reply(struct ceph_connection *con) |
4e7a5dcd SW |
6027 | { |
6028 | struct ceph_mds_session *s = con->private; | |
6029 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
3d14c5d2 | 6030 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; |
285ea34f | 6031 | struct ceph_auth_handshake *auth = &s->s_auth; |
4e7a5dcd | 6032 | |
285ea34f ID |
6033 | return ceph_auth_verify_authorizer_reply(ac, auth->authorizer, |
6034 | auth->authorizer_reply_buf, auth->authorizer_reply_buf_len, | |
6035 | NULL, NULL, NULL, NULL); | |
4e7a5dcd SW |
6036 | } |
6037 | ||
4972cf60 | 6038 | static int mds_invalidate_authorizer(struct ceph_connection *con) |
9bd2e6f8 SW |
6039 | { |
6040 | struct ceph_mds_session *s = con->private; | |
6041 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
3d14c5d2 | 6042 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; |
9bd2e6f8 | 6043 | |
27859f97 | 6044 | ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_MDS); |
9bd2e6f8 | 6045 | |
3d14c5d2 | 6046 | return ceph_monc_validate_auth(&mdsc->fsc->client->monc); |
9bd2e6f8 SW |
6047 | } |
6048 | ||
cd1a677c ID |
6049 | static int mds_get_auth_request(struct ceph_connection *con, |
6050 | void *buf, int *buf_len, | |
6051 | void **authorizer, int *authorizer_len) | |
6052 | { | |
6053 | struct ceph_mds_session *s = con->private; | |
6054 | struct ceph_auth_client *ac = s->s_mdsc->fsc->client->monc.auth; | |
6055 | struct ceph_auth_handshake *auth = &s->s_auth; | |
6056 | int ret; | |
6057 | ||
6058 | ret = ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_MDS, | |
6059 | buf, buf_len); | |
6060 | if (ret) | |
6061 | return ret; | |
6062 | ||
6063 | *authorizer = auth->authorizer_buf; | |
6064 | *authorizer_len = auth->authorizer_buf_len; | |
6065 | return 0; | |
6066 | } | |
6067 | ||
6068 | static int mds_handle_auth_reply_more(struct ceph_connection *con, | |
6069 | void *reply, int reply_len, | |
6070 | void *buf, int *buf_len, | |
6071 | void **authorizer, int *authorizer_len) | |
6072 | { | |
6073 | struct ceph_mds_session *s = con->private; | |
6074 | struct ceph_auth_client *ac = s->s_mdsc->fsc->client->monc.auth; | |
6075 | struct ceph_auth_handshake *auth = &s->s_auth; | |
6076 | int ret; | |
6077 | ||
6078 | ret = ceph_auth_handle_svc_reply_more(ac, auth, reply, reply_len, | |
6079 | buf, buf_len); | |
6080 | if (ret) | |
6081 | return ret; | |
6082 | ||
6083 | *authorizer = auth->authorizer_buf; | |
6084 | *authorizer_len = auth->authorizer_buf_len; | |
6085 | return 0; | |
6086 | } | |
6087 | ||
6088 | static int mds_handle_auth_done(struct ceph_connection *con, | |
6089 | u64 global_id, void *reply, int reply_len, | |
6090 | u8 *session_key, int *session_key_len, | |
6091 | u8 *con_secret, int *con_secret_len) | |
6092 | { | |
6093 | struct ceph_mds_session *s = con->private; | |
6094 | struct ceph_auth_client *ac = s->s_mdsc->fsc->client->monc.auth; | |
6095 | struct ceph_auth_handshake *auth = &s->s_auth; | |
6096 | ||
6097 | return ceph_auth_handle_svc_reply_done(ac, auth, reply, reply_len, | |
6098 | session_key, session_key_len, | |
6099 | con_secret, con_secret_len); | |
6100 | } | |
6101 | ||
6102 | static int mds_handle_auth_bad_method(struct ceph_connection *con, | |
6103 | int used_proto, int result, | |
6104 | const int *allowed_protos, int proto_cnt, | |
6105 | const int *allowed_modes, int mode_cnt) | |
6106 | { | |
6107 | struct ceph_mds_session *s = con->private; | |
6108 | struct ceph_mon_client *monc = &s->s_mdsc->fsc->client->monc; | |
6109 | int ret; | |
6110 | ||
6111 | if (ceph_auth_handle_bad_authorizer(monc->auth, CEPH_ENTITY_TYPE_MDS, | |
6112 | used_proto, result, | |
6113 | allowed_protos, proto_cnt, | |
6114 | allowed_modes, mode_cnt)) { | |
6115 | ret = ceph_monc_validate_auth(monc); | |
6116 | if (ret) | |
6117 | return ret; | |
6118 | } | |
6119 | ||
6120 | return -EACCES; | |
6121 | } | |
6122 | ||
53ded495 AE |
6123 | static struct ceph_msg *mds_alloc_msg(struct ceph_connection *con, |
6124 | struct ceph_msg_header *hdr, int *skip) | |
6125 | { | |
6126 | struct ceph_msg *msg; | |
6127 | int type = (int) le16_to_cpu(hdr->type); | |
6128 | int front_len = (int) le32_to_cpu(hdr->front_len); | |
6129 | ||
6130 | if (con->in_msg) | |
6131 | return con->in_msg; | |
6132 | ||
6133 | *skip = 0; | |
6134 | msg = ceph_msg_new(type, front_len, GFP_NOFS, false); | |
6135 | if (!msg) { | |
6136 | pr_err("unable to allocate msg type %d len %d\n", | |
6137 | type, front_len); | |
6138 | return NULL; | |
6139 | } | |
53ded495 AE |
6140 | |
6141 | return msg; | |
6142 | } | |
6143 | ||
79dbd1ba | 6144 | static int mds_sign_message(struct ceph_msg *msg) |
33d07337 | 6145 | { |
79dbd1ba | 6146 | struct ceph_mds_session *s = msg->con->private; |
33d07337 | 6147 | struct ceph_auth_handshake *auth = &s->s_auth; |
79dbd1ba | 6148 | |
33d07337 YZ |
6149 | return ceph_auth_sign_message(auth, msg); |
6150 | } | |
6151 | ||
79dbd1ba | 6152 | static int mds_check_message_signature(struct ceph_msg *msg) |
33d07337 | 6153 | { |
79dbd1ba | 6154 | struct ceph_mds_session *s = msg->con->private; |
33d07337 | 6155 | struct ceph_auth_handshake *auth = &s->s_auth; |
79dbd1ba | 6156 | |
33d07337 YZ |
6157 | return ceph_auth_check_message_signature(auth, msg); |
6158 | } | |
6159 | ||
9e32789f | 6160 | static const struct ceph_connection_operations mds_con_ops = { |
4972cf60 ID |
6161 | .get = mds_get_con, |
6162 | .put = mds_put_con, | |
53ded495 | 6163 | .alloc_msg = mds_alloc_msg, |
4972cf60 ID |
6164 | .dispatch = mds_dispatch, |
6165 | .peer_reset = mds_peer_reset, | |
6166 | .get_authorizer = mds_get_authorizer, | |
6167 | .add_authorizer_challenge = mds_add_authorizer_challenge, | |
6168 | .verify_authorizer_reply = mds_verify_authorizer_reply, | |
6169 | .invalidate_authorizer = mds_invalidate_authorizer, | |
79dbd1ba ID |
6170 | .sign_message = mds_sign_message, |
6171 | .check_message_signature = mds_check_message_signature, | |
cd1a677c ID |
6172 | .get_auth_request = mds_get_auth_request, |
6173 | .handle_auth_reply_more = mds_handle_auth_reply_more, | |
6174 | .handle_auth_done = mds_handle_auth_done, | |
6175 | .handle_auth_bad_method = mds_handle_auth_bad_method, | |
2f2dc053 SW |
6176 | }; |
6177 | ||
2f2dc053 | 6178 | /* eof */ |