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> |
2f2dc053 | 12 | |
2f2dc053 | 13 | #include "super.h" |
3d14c5d2 YS |
14 | #include "mds_client.h" |
15 | ||
1fe60e51 | 16 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
17 | #include <linux/ceph/messenger.h> |
18 | #include <linux/ceph/decode.h> | |
19 | #include <linux/ceph/pagelist.h> | |
20 | #include <linux/ceph/auth.h> | |
21 | #include <linux/ceph/debugfs.h> | |
2f2dc053 | 22 | |
81c5a148 YZ |
23 | #define RECONNECT_MAX_SIZE (INT_MAX - PAGE_SIZE) |
24 | ||
2f2dc053 SW |
25 | /* |
26 | * A cluster of MDS (metadata server) daemons is responsible for | |
27 | * managing the file system namespace (the directory hierarchy and | |
28 | * inodes) and for coordinating shared access to storage. Metadata is | |
29 | * partitioning hierarchically across a number of servers, and that | |
30 | * partition varies over time as the cluster adjusts the distribution | |
31 | * in order to balance load. | |
32 | * | |
33 | * The MDS client is primarily responsible to managing synchronous | |
34 | * metadata requests for operations like open, unlink, and so forth. | |
35 | * If there is a MDS failure, we find out about it when we (possibly | |
36 | * request and) receive a new MDS map, and can resubmit affected | |
37 | * requests. | |
38 | * | |
39 | * For the most part, though, we take advantage of a lossless | |
40 | * communications channel to the MDS, and do not need to worry about | |
41 | * timing out or resubmitting requests. | |
42 | * | |
43 | * We maintain a stateful "session" with each MDS we interact with. | |
44 | * Within each session, we sent periodic heartbeat messages to ensure | |
45 | * any capabilities or leases we have been issues remain valid. If | |
46 | * the session times out and goes stale, our leases and capabilities | |
47 | * are no longer valid. | |
48 | */ | |
49 | ||
20cb34ae | 50 | struct ceph_reconnect_state { |
81c5a148 YZ |
51 | struct ceph_mds_session *session; |
52 | int nr_caps, nr_realms; | |
20cb34ae | 53 | struct ceph_pagelist *pagelist; |
121f22a1 | 54 | unsigned msg_version; |
81c5a148 | 55 | bool allow_multi; |
20cb34ae SW |
56 | }; |
57 | ||
2f2dc053 SW |
58 | static void __wake_requests(struct ceph_mds_client *mdsc, |
59 | struct list_head *head); | |
e3ec8d68 | 60 | static void ceph_cap_release_work(struct work_struct *work); |
37c4efc1 | 61 | static void ceph_cap_reclaim_work(struct work_struct *work); |
2f2dc053 | 62 | |
9e32789f | 63 | static const struct ceph_connection_operations mds_con_ops; |
2f2dc053 SW |
64 | |
65 | ||
66 | /* | |
67 | * mds reply parsing | |
68 | */ | |
69 | ||
b37fe1f9 YZ |
70 | static int parse_reply_info_quota(void **p, void *end, |
71 | struct ceph_mds_reply_info_in *info) | |
72 | { | |
73 | u8 struct_v, struct_compat; | |
74 | u32 struct_len; | |
75 | ||
76 | ceph_decode_8_safe(p, end, struct_v, bad); | |
77 | ceph_decode_8_safe(p, end, struct_compat, bad); | |
78 | /* struct_v is expected to be >= 1. we only | |
79 | * understand encoding with struct_compat == 1. */ | |
80 | if (!struct_v || struct_compat != 1) | |
81 | goto bad; | |
82 | ceph_decode_32_safe(p, end, struct_len, bad); | |
83 | ceph_decode_need(p, end, struct_len, bad); | |
84 | end = *p + struct_len; | |
85 | ceph_decode_64_safe(p, end, info->max_bytes, bad); | |
86 | ceph_decode_64_safe(p, end, info->max_files, bad); | |
87 | *p = end; | |
88 | return 0; | |
89 | bad: | |
90 | return -EIO; | |
91 | } | |
92 | ||
2f2dc053 SW |
93 | /* |
94 | * parse individual inode info | |
95 | */ | |
96 | static int parse_reply_info_in(void **p, void *end, | |
14303d20 | 97 | struct ceph_mds_reply_info_in *info, |
12b4629a | 98 | u64 features) |
2f2dc053 | 99 | { |
b37fe1f9 YZ |
100 | int err = 0; |
101 | u8 struct_v = 0; | |
2f2dc053 | 102 | |
b37fe1f9 YZ |
103 | if (features == (u64)-1) { |
104 | u32 struct_len; | |
105 | u8 struct_compat; | |
106 | ceph_decode_8_safe(p, end, struct_v, bad); | |
107 | ceph_decode_8_safe(p, end, struct_compat, bad); | |
108 | /* struct_v is expected to be >= 1. we only understand | |
109 | * encoding with struct_compat == 1. */ | |
110 | if (!struct_v || struct_compat != 1) | |
111 | goto bad; | |
112 | ceph_decode_32_safe(p, end, struct_len, bad); | |
113 | ceph_decode_need(p, end, struct_len, bad); | |
114 | end = *p + struct_len; | |
115 | } | |
116 | ||
117 | ceph_decode_need(p, end, sizeof(struct ceph_mds_reply_inode), bad); | |
2f2dc053 SW |
118 | info->in = *p; |
119 | *p += sizeof(struct ceph_mds_reply_inode) + | |
120 | sizeof(*info->in->fragtree.splits) * | |
121 | le32_to_cpu(info->in->fragtree.nsplits); | |
122 | ||
123 | ceph_decode_32_safe(p, end, info->symlink_len, bad); | |
124 | ceph_decode_need(p, end, info->symlink_len, bad); | |
125 | info->symlink = *p; | |
126 | *p += info->symlink_len; | |
127 | ||
23c625ce ID |
128 | ceph_decode_copy_safe(p, end, &info->dir_layout, |
129 | sizeof(info->dir_layout), bad); | |
2f2dc053 SW |
130 | ceph_decode_32_safe(p, end, info->xattr_len, bad); |
131 | ceph_decode_need(p, end, info->xattr_len, bad); | |
132 | info->xattr_data = *p; | |
133 | *p += info->xattr_len; | |
fb01d1f8 | 134 | |
b37fe1f9 YZ |
135 | if (features == (u64)-1) { |
136 | /* inline data */ | |
fb01d1f8 YZ |
137 | ceph_decode_64_safe(p, end, info->inline_version, bad); |
138 | ceph_decode_32_safe(p, end, info->inline_len, bad); | |
139 | ceph_decode_need(p, end, info->inline_len, bad); | |
140 | info->inline_data = *p; | |
141 | *p += info->inline_len; | |
b37fe1f9 YZ |
142 | /* quota */ |
143 | err = parse_reply_info_quota(p, end, info); | |
144 | if (err < 0) | |
145 | goto out_bad; | |
146 | /* pool namespace */ | |
147 | ceph_decode_32_safe(p, end, info->pool_ns_len, bad); | |
148 | if (info->pool_ns_len > 0) { | |
149 | ceph_decode_need(p, end, info->pool_ns_len, bad); | |
150 | info->pool_ns_data = *p; | |
151 | *p += info->pool_ns_len; | |
152 | } | |
245ce991 JL |
153 | |
154 | /* btime */ | |
155 | ceph_decode_need(p, end, sizeof(info->btime), bad); | |
156 | ceph_decode_copy(p, &info->btime, sizeof(info->btime)); | |
157 | ||
158 | /* change attribute */ | |
a35ead31 | 159 | ceph_decode_64_safe(p, end, info->change_attr, bad); |
fb01d1f8 | 160 | |
08796873 YZ |
161 | /* dir pin */ |
162 | if (struct_v >= 2) { | |
163 | ceph_decode_32_safe(p, end, info->dir_pin, bad); | |
164 | } else { | |
165 | info->dir_pin = -ENODATA; | |
166 | } | |
167 | ||
193e7b37 DD |
168 | /* snapshot birth time, remains zero for v<=2 */ |
169 | if (struct_v >= 3) { | |
170 | ceph_decode_need(p, end, sizeof(info->snap_btime), bad); | |
171 | ceph_decode_copy(p, &info->snap_btime, | |
172 | sizeof(info->snap_btime)); | |
173 | } else { | |
174 | memset(&info->snap_btime, 0, sizeof(info->snap_btime)); | |
175 | } | |
176 | ||
b37fe1f9 YZ |
177 | *p = end; |
178 | } else { | |
179 | if (features & CEPH_FEATURE_MDS_INLINE_DATA) { | |
180 | ceph_decode_64_safe(p, end, info->inline_version, bad); | |
181 | ceph_decode_32_safe(p, end, info->inline_len, bad); | |
182 | ceph_decode_need(p, end, info->inline_len, bad); | |
183 | info->inline_data = *p; | |
184 | *p += info->inline_len; | |
185 | } else | |
186 | info->inline_version = CEPH_INLINE_NONE; | |
187 | ||
188 | if (features & CEPH_FEATURE_MDS_QUOTA) { | |
189 | err = parse_reply_info_quota(p, end, info); | |
190 | if (err < 0) | |
191 | goto out_bad; | |
192 | } else { | |
193 | info->max_bytes = 0; | |
194 | info->max_files = 0; | |
195 | } | |
196 | ||
197 | info->pool_ns_len = 0; | |
198 | info->pool_ns_data = NULL; | |
199 | if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) { | |
200 | ceph_decode_32_safe(p, end, info->pool_ns_len, bad); | |
201 | if (info->pool_ns_len > 0) { | |
202 | ceph_decode_need(p, end, info->pool_ns_len, bad); | |
203 | info->pool_ns_data = *p; | |
204 | *p += info->pool_ns_len; | |
205 | } | |
206 | } | |
08796873 | 207 | |
245ce991 JL |
208 | if (features & CEPH_FEATURE_FS_BTIME) { |
209 | ceph_decode_need(p, end, sizeof(info->btime), bad); | |
210 | ceph_decode_copy(p, &info->btime, sizeof(info->btime)); | |
a35ead31 | 211 | ceph_decode_64_safe(p, end, info->change_attr, bad); |
245ce991 JL |
212 | } |
213 | ||
08796873 | 214 | info->dir_pin = -ENODATA; |
193e7b37 | 215 | /* info->snap_btime remains zero */ |
b37fe1f9 YZ |
216 | } |
217 | return 0; | |
218 | bad: | |
219 | err = -EIO; | |
220 | out_bad: | |
221 | return err; | |
222 | } | |
223 | ||
224 | static int parse_reply_info_dir(void **p, void *end, | |
225 | struct ceph_mds_reply_dirfrag **dirfrag, | |
226 | u64 features) | |
227 | { | |
228 | if (features == (u64)-1) { | |
fb18a575 LH |
229 | u8 struct_v, struct_compat; |
230 | u32 struct_len; | |
fb18a575 LH |
231 | ceph_decode_8_safe(p, end, struct_v, bad); |
232 | ceph_decode_8_safe(p, end, struct_compat, bad); | |
b37fe1f9 YZ |
233 | /* struct_v is expected to be >= 1. we only understand |
234 | * encoding whose struct_compat == 1. */ | |
235 | if (!struct_v || struct_compat != 1) | |
fb18a575 LH |
236 | goto bad; |
237 | ceph_decode_32_safe(p, end, struct_len, bad); | |
238 | ceph_decode_need(p, end, struct_len, bad); | |
b37fe1f9 | 239 | end = *p + struct_len; |
fb18a575 LH |
240 | } |
241 | ||
b37fe1f9 YZ |
242 | ceph_decode_need(p, end, sizeof(**dirfrag), bad); |
243 | *dirfrag = *p; | |
244 | *p += sizeof(**dirfrag) + sizeof(u32) * le32_to_cpu((*dirfrag)->ndist); | |
245 | if (unlikely(*p > end)) | |
246 | goto bad; | |
247 | if (features == (u64)-1) | |
248 | *p = end; | |
249 | return 0; | |
250 | bad: | |
251 | return -EIO; | |
252 | } | |
253 | ||
254 | static int parse_reply_info_lease(void **p, void *end, | |
255 | struct ceph_mds_reply_lease **lease, | |
256 | u64 features) | |
257 | { | |
258 | if (features == (u64)-1) { | |
259 | u8 struct_v, struct_compat; | |
260 | u32 struct_len; | |
261 | ceph_decode_8_safe(p, end, struct_v, bad); | |
262 | ceph_decode_8_safe(p, end, struct_compat, bad); | |
263 | /* struct_v is expected to be >= 1. we only understand | |
264 | * encoding whose struct_compat == 1. */ | |
265 | if (!struct_v || struct_compat != 1) | |
266 | goto bad; | |
267 | ceph_decode_32_safe(p, end, struct_len, bad); | |
268 | ceph_decode_need(p, end, struct_len, bad); | |
269 | end = *p + struct_len; | |
5ea5c5e0 YZ |
270 | } |
271 | ||
b37fe1f9 YZ |
272 | ceph_decode_need(p, end, sizeof(**lease), bad); |
273 | *lease = *p; | |
274 | *p += sizeof(**lease); | |
275 | if (features == (u64)-1) | |
276 | *p = end; | |
2f2dc053 SW |
277 | return 0; |
278 | bad: | |
b37fe1f9 | 279 | return -EIO; |
2f2dc053 SW |
280 | } |
281 | ||
282 | /* | |
283 | * parse a normal reply, which may contain a (dir+)dentry and/or a | |
284 | * target inode. | |
285 | */ | |
286 | static int parse_reply_info_trace(void **p, void *end, | |
14303d20 | 287 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 288 | u64 features) |
2f2dc053 SW |
289 | { |
290 | int err; | |
291 | ||
292 | if (info->head->is_dentry) { | |
14303d20 | 293 | err = parse_reply_info_in(p, end, &info->diri, features); |
2f2dc053 SW |
294 | if (err < 0) |
295 | goto out_bad; | |
296 | ||
b37fe1f9 YZ |
297 | err = parse_reply_info_dir(p, end, &info->dirfrag, features); |
298 | if (err < 0) | |
299 | goto out_bad; | |
2f2dc053 SW |
300 | |
301 | ceph_decode_32_safe(p, end, info->dname_len, bad); | |
302 | ceph_decode_need(p, end, info->dname_len, bad); | |
303 | info->dname = *p; | |
304 | *p += info->dname_len; | |
b37fe1f9 YZ |
305 | |
306 | err = parse_reply_info_lease(p, end, &info->dlease, features); | |
307 | if (err < 0) | |
308 | goto out_bad; | |
2f2dc053 SW |
309 | } |
310 | ||
311 | if (info->head->is_target) { | |
14303d20 | 312 | err = parse_reply_info_in(p, end, &info->targeti, features); |
2f2dc053 SW |
313 | if (err < 0) |
314 | goto out_bad; | |
315 | } | |
316 | ||
317 | if (unlikely(*p != end)) | |
318 | goto bad; | |
319 | return 0; | |
320 | ||
321 | bad: | |
322 | err = -EIO; | |
323 | out_bad: | |
324 | pr_err("problem parsing mds trace %d\n", err); | |
325 | return err; | |
326 | } | |
327 | ||
328 | /* | |
329 | * parse readdir results | |
330 | */ | |
b37fe1f9 | 331 | static int parse_reply_info_readdir(void **p, void *end, |
14303d20 | 332 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 333 | u64 features) |
2f2dc053 SW |
334 | { |
335 | u32 num, i = 0; | |
336 | int err; | |
337 | ||
b37fe1f9 YZ |
338 | err = parse_reply_info_dir(p, end, &info->dir_dir, features); |
339 | if (err < 0) | |
340 | goto out_bad; | |
2f2dc053 SW |
341 | |
342 | ceph_decode_need(p, end, sizeof(num) + 2, bad); | |
c89136ea | 343 | num = ceph_decode_32(p); |
956d39d6 YZ |
344 | { |
345 | u16 flags = ceph_decode_16(p); | |
346 | info->dir_end = !!(flags & CEPH_READDIR_FRAG_END); | |
347 | info->dir_complete = !!(flags & CEPH_READDIR_FRAG_COMPLETE); | |
f3c4ebe6 | 348 | info->hash_order = !!(flags & CEPH_READDIR_HASH_ORDER); |
79162547 | 349 | info->offset_hash = !!(flags & CEPH_READDIR_OFFSET_HASH); |
956d39d6 | 350 | } |
2f2dc053 SW |
351 | if (num == 0) |
352 | goto done; | |
353 | ||
2a5beea3 YZ |
354 | BUG_ON(!info->dir_entries); |
355 | if ((unsigned long)(info->dir_entries + num) > | |
356 | (unsigned long)info->dir_entries + info->dir_buf_size) { | |
54008399 YZ |
357 | pr_err("dir contents are larger than expected\n"); |
358 | WARN_ON(1); | |
359 | goto bad; | |
360 | } | |
2f2dc053 | 361 | |
54008399 | 362 | info->dir_nr = num; |
2f2dc053 | 363 | while (num) { |
2a5beea3 | 364 | struct ceph_mds_reply_dir_entry *rde = info->dir_entries + i; |
2f2dc053 | 365 | /* dentry */ |
b37fe1f9 | 366 | ceph_decode_32_safe(p, end, rde->name_len, bad); |
2a5beea3 YZ |
367 | ceph_decode_need(p, end, rde->name_len, bad); |
368 | rde->name = *p; | |
369 | *p += rde->name_len; | |
370 | dout("parsed dir dname '%.*s'\n", rde->name_len, rde->name); | |
2f2dc053 | 371 | |
b37fe1f9 YZ |
372 | /* dentry lease */ |
373 | err = parse_reply_info_lease(p, end, &rde->lease, features); | |
374 | if (err) | |
375 | goto out_bad; | |
2f2dc053 | 376 | /* inode */ |
2a5beea3 | 377 | err = parse_reply_info_in(p, end, &rde->inode, features); |
2f2dc053 SW |
378 | if (err < 0) |
379 | goto out_bad; | |
8974eebd YZ |
380 | /* ceph_readdir_prepopulate() will update it */ |
381 | rde->offset = 0; | |
2f2dc053 SW |
382 | i++; |
383 | num--; | |
384 | } | |
385 | ||
386 | done: | |
387 | if (*p != end) | |
388 | goto bad; | |
389 | return 0; | |
390 | ||
391 | bad: | |
392 | err = -EIO; | |
393 | out_bad: | |
394 | pr_err("problem parsing dir contents %d\n", err); | |
395 | return err; | |
396 | } | |
397 | ||
25933abd HS |
398 | /* |
399 | * parse fcntl F_GETLK results | |
400 | */ | |
401 | static int parse_reply_info_filelock(void **p, void *end, | |
14303d20 | 402 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 403 | u64 features) |
25933abd HS |
404 | { |
405 | if (*p + sizeof(*info->filelock_reply) > end) | |
406 | goto bad; | |
407 | ||
408 | info->filelock_reply = *p; | |
409 | *p += sizeof(*info->filelock_reply); | |
410 | ||
411 | if (unlikely(*p != end)) | |
412 | goto bad; | |
413 | return 0; | |
414 | ||
415 | bad: | |
416 | return -EIO; | |
417 | } | |
418 | ||
6e8575fa SL |
419 | /* |
420 | * parse create results | |
421 | */ | |
422 | static int parse_reply_info_create(void **p, void *end, | |
423 | struct ceph_mds_reply_info_parsed *info, | |
12b4629a | 424 | u64 features) |
6e8575fa | 425 | { |
b37fe1f9 YZ |
426 | if (features == (u64)-1 || |
427 | (features & CEPH_FEATURE_REPLY_CREATE_INODE)) { | |
6e8575fa SL |
428 | if (*p == end) { |
429 | info->has_create_ino = false; | |
430 | } else { | |
431 | info->has_create_ino = true; | |
432 | info->ino = ceph_decode_64(p); | |
433 | } | |
434 | } | |
435 | ||
436 | if (unlikely(*p != end)) | |
437 | goto bad; | |
438 | return 0; | |
439 | ||
440 | bad: | |
441 | return -EIO; | |
442 | } | |
443 | ||
25933abd HS |
444 | /* |
445 | * parse extra results | |
446 | */ | |
447 | static int parse_reply_info_extra(void **p, void *end, | |
14303d20 | 448 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 449 | u64 features) |
25933abd | 450 | { |
6df8c9d8 JL |
451 | u32 op = le32_to_cpu(info->head->op); |
452 | ||
453 | if (op == CEPH_MDS_OP_GETFILELOCK) | |
14303d20 | 454 | return parse_reply_info_filelock(p, end, info, features); |
6df8c9d8 | 455 | else if (op == CEPH_MDS_OP_READDIR || op == CEPH_MDS_OP_LSSNAP) |
b37fe1f9 | 456 | return parse_reply_info_readdir(p, end, info, features); |
6df8c9d8 | 457 | else if (op == CEPH_MDS_OP_CREATE) |
6e8575fa SL |
458 | return parse_reply_info_create(p, end, info, features); |
459 | else | |
460 | return -EIO; | |
25933abd HS |
461 | } |
462 | ||
2f2dc053 SW |
463 | /* |
464 | * parse entire mds reply | |
465 | */ | |
466 | static int parse_reply_info(struct ceph_msg *msg, | |
14303d20 | 467 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 468 | u64 features) |
2f2dc053 SW |
469 | { |
470 | void *p, *end; | |
471 | u32 len; | |
472 | int err; | |
473 | ||
474 | info->head = msg->front.iov_base; | |
475 | p = msg->front.iov_base + sizeof(struct ceph_mds_reply_head); | |
476 | end = p + msg->front.iov_len - sizeof(struct ceph_mds_reply_head); | |
477 | ||
478 | /* trace */ | |
479 | ceph_decode_32_safe(&p, end, len, bad); | |
480 | if (len > 0) { | |
32852a81 | 481 | ceph_decode_need(&p, end, len, bad); |
14303d20 | 482 | err = parse_reply_info_trace(&p, p+len, info, features); |
2f2dc053 SW |
483 | if (err < 0) |
484 | goto out_bad; | |
485 | } | |
486 | ||
25933abd | 487 | /* extra */ |
2f2dc053 SW |
488 | ceph_decode_32_safe(&p, end, len, bad); |
489 | if (len > 0) { | |
32852a81 | 490 | ceph_decode_need(&p, end, len, bad); |
14303d20 | 491 | err = parse_reply_info_extra(&p, p+len, info, features); |
2f2dc053 SW |
492 | if (err < 0) |
493 | goto out_bad; | |
494 | } | |
495 | ||
496 | /* snap blob */ | |
497 | ceph_decode_32_safe(&p, end, len, bad); | |
498 | info->snapblob_len = len; | |
499 | info->snapblob = p; | |
500 | p += len; | |
501 | ||
502 | if (p != end) | |
503 | goto bad; | |
504 | return 0; | |
505 | ||
506 | bad: | |
507 | err = -EIO; | |
508 | out_bad: | |
509 | pr_err("mds parse_reply err %d\n", err); | |
510 | return err; | |
511 | } | |
512 | ||
513 | static void destroy_reply_info(struct ceph_mds_reply_info_parsed *info) | |
514 | { | |
2a5beea3 | 515 | if (!info->dir_entries) |
54008399 | 516 | return; |
2a5beea3 | 517 | free_pages((unsigned long)info->dir_entries, get_order(info->dir_buf_size)); |
2f2dc053 SW |
518 | } |
519 | ||
520 | ||
521 | /* | |
522 | * sessions | |
523 | */ | |
a687ecaf | 524 | const char *ceph_session_state_name(int s) |
2f2dc053 SW |
525 | { |
526 | switch (s) { | |
527 | case CEPH_MDS_SESSION_NEW: return "new"; | |
528 | case CEPH_MDS_SESSION_OPENING: return "opening"; | |
529 | case CEPH_MDS_SESSION_OPEN: return "open"; | |
530 | case CEPH_MDS_SESSION_HUNG: return "hung"; | |
531 | case CEPH_MDS_SESSION_CLOSING: return "closing"; | |
44ca18f2 | 532 | case CEPH_MDS_SESSION_RESTARTING: return "restarting"; |
2f2dc053 | 533 | case CEPH_MDS_SESSION_RECONNECTING: return "reconnecting"; |
fcff415c | 534 | case CEPH_MDS_SESSION_REJECTED: return "rejected"; |
2f2dc053 SW |
535 | default: return "???"; |
536 | } | |
537 | } | |
538 | ||
539 | static struct ceph_mds_session *get_session(struct ceph_mds_session *s) | |
540 | { | |
3997c01d | 541 | if (refcount_inc_not_zero(&s->s_ref)) { |
2f2dc053 | 542 | dout("mdsc get_session %p %d -> %d\n", s, |
3997c01d | 543 | refcount_read(&s->s_ref)-1, refcount_read(&s->s_ref)); |
2f2dc053 SW |
544 | return s; |
545 | } else { | |
4c069a58 | 546 | dout("mdsc get_session %p 0 -- FAIL\n", s); |
2f2dc053 SW |
547 | return NULL; |
548 | } | |
549 | } | |
550 | ||
551 | void ceph_put_mds_session(struct ceph_mds_session *s) | |
552 | { | |
553 | dout("mdsc put_session %p %d -> %d\n", s, | |
3997c01d ER |
554 | refcount_read(&s->s_ref), refcount_read(&s->s_ref)-1); |
555 | if (refcount_dec_and_test(&s->s_ref)) { | |
6c4a1915 | 556 | if (s->s_auth.authorizer) |
6c1ea260 | 557 | ceph_auth_destroy_authorizer(s->s_auth.authorizer); |
2f2dc053 | 558 | kfree(s); |
4e7a5dcd | 559 | } |
2f2dc053 SW |
560 | } |
561 | ||
562 | /* | |
563 | * called under mdsc->mutex | |
564 | */ | |
565 | struct ceph_mds_session *__ceph_lookup_mds_session(struct ceph_mds_client *mdsc, | |
566 | int mds) | |
567 | { | |
d37b1d99 | 568 | if (mds >= mdsc->max_sessions || !mdsc->sessions[mds]) |
2f2dc053 | 569 | return NULL; |
488f5284 | 570 | return get_session(mdsc->sessions[mds]); |
2f2dc053 SW |
571 | } |
572 | ||
573 | static bool __have_session(struct ceph_mds_client *mdsc, int mds) | |
574 | { | |
98cfda81 | 575 | if (mds >= mdsc->max_sessions || !mdsc->sessions[mds]) |
2f2dc053 | 576 | return false; |
98cfda81 CX |
577 | else |
578 | return true; | |
2f2dc053 SW |
579 | } |
580 | ||
2600d2dd SW |
581 | static int __verify_registered_session(struct ceph_mds_client *mdsc, |
582 | struct ceph_mds_session *s) | |
583 | { | |
584 | if (s->s_mds >= mdsc->max_sessions || | |
585 | mdsc->sessions[s->s_mds] != s) | |
586 | return -ENOENT; | |
587 | return 0; | |
588 | } | |
589 | ||
2f2dc053 SW |
590 | /* |
591 | * create+register a new session for given mds. | |
592 | * called under mdsc->mutex. | |
593 | */ | |
594 | static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc, | |
595 | int mds) | |
596 | { | |
597 | struct ceph_mds_session *s; | |
598 | ||
76201b63 | 599 | if (mds >= mdsc->mdsmap->m_num_mds) |
c338c07c NY |
600 | return ERR_PTR(-EINVAL); |
601 | ||
2f2dc053 | 602 | s = kzalloc(sizeof(*s), GFP_NOFS); |
4736b009 DC |
603 | if (!s) |
604 | return ERR_PTR(-ENOMEM); | |
47474d0b CX |
605 | |
606 | if (mds >= mdsc->max_sessions) { | |
607 | int newmax = 1 << get_count_order(mds + 1); | |
608 | struct ceph_mds_session **sa; | |
609 | ||
610 | dout("%s: realloc to %d\n", __func__, newmax); | |
611 | sa = kcalloc(newmax, sizeof(void *), GFP_NOFS); | |
612 | if (!sa) | |
613 | goto fail_realloc; | |
614 | if (mdsc->sessions) { | |
615 | memcpy(sa, mdsc->sessions, | |
616 | mdsc->max_sessions * sizeof(void *)); | |
617 | kfree(mdsc->sessions); | |
618 | } | |
619 | mdsc->sessions = sa; | |
620 | mdsc->max_sessions = newmax; | |
621 | } | |
622 | ||
623 | dout("%s: mds%d\n", __func__, mds); | |
2f2dc053 SW |
624 | s->s_mdsc = mdsc; |
625 | s->s_mds = mds; | |
626 | s->s_state = CEPH_MDS_SESSION_NEW; | |
627 | s->s_ttl = 0; | |
628 | s->s_seq = 0; | |
629 | mutex_init(&s->s_mutex); | |
630 | ||
b7a9e5dd | 631 | ceph_con_init(&s->s_con, s, &mds_con_ops, &mdsc->fsc->client->msgr); |
2f2dc053 | 632 | |
d8fb02ab | 633 | spin_lock_init(&s->s_gen_ttl_lock); |
1e9c2eb6 | 634 | s->s_cap_gen = 1; |
1ce208a6 | 635 | s->s_cap_ttl = jiffies - 1; |
d8fb02ab AE |
636 | |
637 | spin_lock_init(&s->s_cap_lock); | |
2f2dc053 SW |
638 | s->s_renew_requested = 0; |
639 | s->s_renew_seq = 0; | |
640 | INIT_LIST_HEAD(&s->s_caps); | |
641 | s->s_nr_caps = 0; | |
3997c01d | 642 | refcount_set(&s->s_ref, 1); |
2f2dc053 SW |
643 | INIT_LIST_HEAD(&s->s_waiting); |
644 | INIT_LIST_HEAD(&s->s_unsafe); | |
645 | s->s_num_cap_releases = 0; | |
99a9c273 | 646 | s->s_cap_reconnect = 0; |
7c1332b8 | 647 | s->s_cap_iterator = NULL; |
2f2dc053 | 648 | INIT_LIST_HEAD(&s->s_cap_releases); |
e3ec8d68 YZ |
649 | INIT_WORK(&s->s_cap_release_work, ceph_cap_release_work); |
650 | ||
2f2dc053 | 651 | INIT_LIST_HEAD(&s->s_cap_flushing); |
2f2dc053 | 652 | |
2f2dc053 | 653 | mdsc->sessions[mds] = s; |
86d8f67b | 654 | atomic_inc(&mdsc->num_sessions); |
3997c01d | 655 | refcount_inc(&s->s_ref); /* one ref to sessions[], one to caller */ |
42ce56e5 | 656 | |
b7a9e5dd SW |
657 | ceph_con_open(&s->s_con, CEPH_ENTITY_TYPE_MDS, mds, |
658 | ceph_mdsmap_get_addr(mdsc->mdsmap, mds)); | |
42ce56e5 | 659 | |
2f2dc053 | 660 | return s; |
42ce56e5 SW |
661 | |
662 | fail_realloc: | |
663 | kfree(s); | |
664 | return ERR_PTR(-ENOMEM); | |
2f2dc053 SW |
665 | } |
666 | ||
667 | /* | |
668 | * called under mdsc->mutex | |
669 | */ | |
2600d2dd | 670 | static void __unregister_session(struct ceph_mds_client *mdsc, |
42ce56e5 | 671 | struct ceph_mds_session *s) |
2f2dc053 | 672 | { |
2600d2dd SW |
673 | dout("__unregister_session mds%d %p\n", s->s_mds, s); |
674 | BUG_ON(mdsc->sessions[s->s_mds] != s); | |
42ce56e5 | 675 | mdsc->sessions[s->s_mds] = NULL; |
e3ec8d68 | 676 | s->s_state = 0; |
42ce56e5 SW |
677 | ceph_con_close(&s->s_con); |
678 | ceph_put_mds_session(s); | |
86d8f67b | 679 | atomic_dec(&mdsc->num_sessions); |
2f2dc053 SW |
680 | } |
681 | ||
682 | /* | |
683 | * drop session refs in request. | |
684 | * | |
685 | * should be last request ref, or hold mdsc->mutex | |
686 | */ | |
687 | static void put_request_session(struct ceph_mds_request *req) | |
688 | { | |
689 | if (req->r_session) { | |
690 | ceph_put_mds_session(req->r_session); | |
691 | req->r_session = NULL; | |
692 | } | |
693 | } | |
694 | ||
153c8e6b | 695 | void ceph_mdsc_release_request(struct kref *kref) |
2f2dc053 | 696 | { |
153c8e6b SW |
697 | struct ceph_mds_request *req = container_of(kref, |
698 | struct ceph_mds_request, | |
699 | r_kref); | |
54008399 | 700 | destroy_reply_info(&req->r_reply_info); |
153c8e6b SW |
701 | if (req->r_request) |
702 | ceph_msg_put(req->r_request); | |
54008399 | 703 | if (req->r_reply) |
153c8e6b | 704 | ceph_msg_put(req->r_reply); |
153c8e6b | 705 | if (req->r_inode) { |
41b02e1f | 706 | ceph_put_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN); |
3e1d0452 YZ |
707 | /* avoid calling iput_final() in mds dispatch threads */ |
708 | ceph_async_iput(req->r_inode); | |
153c8e6b | 709 | } |
3dd69aab JL |
710 | if (req->r_parent) |
711 | ceph_put_cap_refs(ceph_inode(req->r_parent), CEPH_CAP_PIN); | |
3e1d0452 | 712 | ceph_async_iput(req->r_target_inode); |
153c8e6b SW |
713 | if (req->r_dentry) |
714 | dput(req->r_dentry); | |
844d87c3 SW |
715 | if (req->r_old_dentry) |
716 | dput(req->r_old_dentry); | |
717 | if (req->r_old_dentry_dir) { | |
41b02e1f SW |
718 | /* |
719 | * track (and drop pins for) r_old_dentry_dir | |
720 | * separately, since r_old_dentry's d_parent may have | |
721 | * changed between the dir mutex being dropped and | |
722 | * this request being freed. | |
723 | */ | |
724 | ceph_put_cap_refs(ceph_inode(req->r_old_dentry_dir), | |
725 | CEPH_CAP_PIN); | |
3e1d0452 | 726 | ceph_async_iput(req->r_old_dentry_dir); |
2f2dc053 | 727 | } |
153c8e6b SW |
728 | kfree(req->r_path1); |
729 | kfree(req->r_path2); | |
25e6bae3 YZ |
730 | if (req->r_pagelist) |
731 | ceph_pagelist_release(req->r_pagelist); | |
153c8e6b | 732 | put_request_session(req); |
37151668 | 733 | ceph_unreserve_caps(req->r_mdsc, &req->r_caps_reservation); |
428138c9 | 734 | WARN_ON_ONCE(!list_empty(&req->r_wait)); |
153c8e6b | 735 | kfree(req); |
2f2dc053 SW |
736 | } |
737 | ||
fcd00b68 ID |
738 | DEFINE_RB_FUNCS(request, struct ceph_mds_request, r_tid, r_node) |
739 | ||
2f2dc053 SW |
740 | /* |
741 | * lookup session, bump ref if found. | |
742 | * | |
743 | * called under mdsc->mutex. | |
744 | */ | |
fcd00b68 ID |
745 | static struct ceph_mds_request * |
746 | lookup_get_request(struct ceph_mds_client *mdsc, u64 tid) | |
2f2dc053 SW |
747 | { |
748 | struct ceph_mds_request *req; | |
44ca18f2 | 749 | |
fcd00b68 ID |
750 | req = lookup_request(&mdsc->request_tree, tid); |
751 | if (req) | |
752 | ceph_mdsc_get_request(req); | |
44ca18f2 | 753 | |
fcd00b68 | 754 | return req; |
2f2dc053 SW |
755 | } |
756 | ||
757 | /* | |
758 | * Register an in-flight request, and assign a tid. Link to directory | |
759 | * are modifying (if any). | |
760 | * | |
761 | * Called under mdsc->mutex. | |
762 | */ | |
763 | static void __register_request(struct ceph_mds_client *mdsc, | |
764 | struct ceph_mds_request *req, | |
765 | struct inode *dir) | |
766 | { | |
e30ee581 ZZ |
767 | int ret = 0; |
768 | ||
2f2dc053 | 769 | req->r_tid = ++mdsc->last_tid; |
e30ee581 ZZ |
770 | if (req->r_num_caps) { |
771 | ret = ceph_reserve_caps(mdsc, &req->r_caps_reservation, | |
772 | req->r_num_caps); | |
773 | if (ret < 0) { | |
774 | pr_err("__register_request %p " | |
775 | "failed to reserve caps: %d\n", req, ret); | |
776 | /* set req->r_err to fail early from __do_request */ | |
777 | req->r_err = ret; | |
778 | return; | |
779 | } | |
780 | } | |
2f2dc053 SW |
781 | dout("__register_request %p tid %lld\n", req, req->r_tid); |
782 | ceph_mdsc_get_request(req); | |
fcd00b68 | 783 | insert_request(&mdsc->request_tree, req); |
2f2dc053 | 784 | |
cb4276cc SW |
785 | req->r_uid = current_fsuid(); |
786 | req->r_gid = current_fsgid(); | |
787 | ||
e8a7b8b1 YZ |
788 | if (mdsc->oldest_tid == 0 && req->r_op != CEPH_MDS_OP_SETFILELOCK) |
789 | mdsc->oldest_tid = req->r_tid; | |
790 | ||
2f2dc053 | 791 | if (dir) { |
3b663780 | 792 | ihold(dir); |
2f2dc053 | 793 | req->r_unsafe_dir = dir; |
2f2dc053 SW |
794 | } |
795 | } | |
796 | ||
797 | static void __unregister_request(struct ceph_mds_client *mdsc, | |
798 | struct ceph_mds_request *req) | |
799 | { | |
800 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); | |
e8a7b8b1 | 801 | |
df963ea8 JL |
802 | /* Never leave an unregistered request on an unsafe list! */ |
803 | list_del_init(&req->r_unsafe_item); | |
804 | ||
e8a7b8b1 YZ |
805 | if (req->r_tid == mdsc->oldest_tid) { |
806 | struct rb_node *p = rb_next(&req->r_node); | |
807 | mdsc->oldest_tid = 0; | |
808 | while (p) { | |
809 | struct ceph_mds_request *next_req = | |
810 | rb_entry(p, struct ceph_mds_request, r_node); | |
811 | if (next_req->r_op != CEPH_MDS_OP_SETFILELOCK) { | |
812 | mdsc->oldest_tid = next_req->r_tid; | |
813 | break; | |
814 | } | |
815 | p = rb_next(p); | |
816 | } | |
817 | } | |
818 | ||
fcd00b68 | 819 | erase_request(&mdsc->request_tree, req); |
2f2dc053 | 820 | |
bc2de10d JL |
821 | if (req->r_unsafe_dir && |
822 | test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { | |
2f2dc053 | 823 | struct ceph_inode_info *ci = ceph_inode(req->r_unsafe_dir); |
2f2dc053 SW |
824 | spin_lock(&ci->i_unsafe_lock); |
825 | list_del_init(&req->r_unsafe_dir_item); | |
826 | spin_unlock(&ci->i_unsafe_lock); | |
4c06ace8 | 827 | } |
bc2de10d JL |
828 | if (req->r_target_inode && |
829 | test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { | |
68cd5b4b YZ |
830 | struct ceph_inode_info *ci = ceph_inode(req->r_target_inode); |
831 | spin_lock(&ci->i_unsafe_lock); | |
832 | list_del_init(&req->r_unsafe_target_item); | |
833 | spin_unlock(&ci->i_unsafe_lock); | |
834 | } | |
3b663780 | 835 | |
4c06ace8 | 836 | if (req->r_unsafe_dir) { |
3e1d0452 YZ |
837 | /* avoid calling iput_final() in mds dispatch threads */ |
838 | ceph_async_iput(req->r_unsafe_dir); | |
3b663780 | 839 | req->r_unsafe_dir = NULL; |
2f2dc053 | 840 | } |
94aa8ae1 | 841 | |
fc55d2c9 YZ |
842 | complete_all(&req->r_safe_completion); |
843 | ||
94aa8ae1 | 844 | ceph_mdsc_put_request(req); |
2f2dc053 SW |
845 | } |
846 | ||
30c71233 JL |
847 | /* |
848 | * Walk back up the dentry tree until we hit a dentry representing a | |
849 | * non-snapshot inode. We do this using the rcu_read_lock (which must be held | |
850 | * when calling this) to ensure that the objects won't disappear while we're | |
851 | * working with them. Once we hit a candidate dentry, we attempt to take a | |
852 | * reference to it, and return that as the result. | |
853 | */ | |
f1075480 DC |
854 | static struct inode *get_nonsnap_parent(struct dentry *dentry) |
855 | { | |
856 | struct inode *inode = NULL; | |
30c71233 JL |
857 | |
858 | while (dentry && !IS_ROOT(dentry)) { | |
859 | inode = d_inode_rcu(dentry); | |
860 | if (!inode || ceph_snap(inode) == CEPH_NOSNAP) | |
861 | break; | |
862 | dentry = dentry->d_parent; | |
863 | } | |
864 | if (inode) | |
865 | inode = igrab(inode); | |
866 | return inode; | |
867 | } | |
868 | ||
2f2dc053 SW |
869 | /* |
870 | * Choose mds to send request to next. If there is a hint set in the | |
871 | * request (e.g., due to a prior forward hint from the mds), use that. | |
872 | * Otherwise, consult frag tree and/or caps to identify the | |
873 | * appropriate mds. If all else fails, choose randomly. | |
874 | * | |
875 | * Called under mdsc->mutex. | |
876 | */ | |
877 | static int __choose_mds(struct ceph_mds_client *mdsc, | |
878 | struct ceph_mds_request *req) | |
879 | { | |
880 | struct inode *inode; | |
881 | struct ceph_inode_info *ci; | |
882 | struct ceph_cap *cap; | |
883 | int mode = req->r_direct_mode; | |
884 | int mds = -1; | |
885 | u32 hash = req->r_direct_hash; | |
bc2de10d | 886 | bool is_hash = test_bit(CEPH_MDS_R_DIRECT_IS_HASH, &req->r_req_flags); |
2f2dc053 SW |
887 | |
888 | /* | |
889 | * is there a specific mds we should try? ignore hint if we have | |
890 | * no session and the mds is not up (active or recovering). | |
891 | */ | |
892 | if (req->r_resend_mds >= 0 && | |
893 | (__have_session(mdsc, req->r_resend_mds) || | |
894 | ceph_mdsmap_get_state(mdsc->mdsmap, req->r_resend_mds) > 0)) { | |
895 | dout("choose_mds using resend_mds mds%d\n", | |
896 | req->r_resend_mds); | |
897 | return req->r_resend_mds; | |
898 | } | |
899 | ||
900 | if (mode == USE_RANDOM_MDS) | |
901 | goto random; | |
902 | ||
903 | inode = NULL; | |
904 | if (req->r_inode) { | |
5d37ca14 YZ |
905 | if (ceph_snap(req->r_inode) != CEPH_SNAPDIR) { |
906 | inode = req->r_inode; | |
907 | ihold(inode); | |
908 | } else { | |
38f340cc YZ |
909 | /* req->r_dentry is non-null for LSSNAP request */ |
910 | rcu_read_lock(); | |
911 | inode = get_nonsnap_parent(req->r_dentry); | |
912 | rcu_read_unlock(); | |
913 | dout("__choose_mds using snapdir's parent %p\n", inode); | |
5d37ca14 | 914 | } |
38f340cc | 915 | } else if (req->r_dentry) { |
d79698da | 916 | /* ignore race with rename; old or new d_parent is okay */ |
30c71233 JL |
917 | struct dentry *parent; |
918 | struct inode *dir; | |
919 | ||
920 | rcu_read_lock(); | |
41883ba8 | 921 | parent = READ_ONCE(req->r_dentry->d_parent); |
3dd69aab | 922 | dir = req->r_parent ? : d_inode_rcu(parent); |
eb6bb1c5 | 923 | |
30c71233 JL |
924 | if (!dir || dir->i_sb != mdsc->fsc->sb) { |
925 | /* not this fs or parent went negative */ | |
2b0143b5 | 926 | inode = d_inode(req->r_dentry); |
30c71233 JL |
927 | if (inode) |
928 | ihold(inode); | |
eb6bb1c5 SW |
929 | } else if (ceph_snap(dir) != CEPH_NOSNAP) { |
930 | /* direct snapped/virtual snapdir requests | |
931 | * based on parent dir inode */ | |
30c71233 | 932 | inode = get_nonsnap_parent(parent); |
eb6bb1c5 | 933 | dout("__choose_mds using nonsnap parent %p\n", inode); |
ca18bede | 934 | } else { |
eb6bb1c5 | 935 | /* dentry target */ |
2b0143b5 | 936 | inode = d_inode(req->r_dentry); |
ca18bede YZ |
937 | if (!inode || mode == USE_AUTH_MDS) { |
938 | /* dir + name */ | |
30c71233 | 939 | inode = igrab(dir); |
ca18bede YZ |
940 | hash = ceph_dentry_hash(dir, req->r_dentry); |
941 | is_hash = true; | |
30c71233 JL |
942 | } else { |
943 | ihold(inode); | |
ca18bede | 944 | } |
2f2dc053 | 945 | } |
30c71233 | 946 | rcu_read_unlock(); |
2f2dc053 | 947 | } |
eb6bb1c5 | 948 | |
2f2dc053 SW |
949 | dout("__choose_mds %p is_hash=%d (%d) mode %d\n", inode, (int)is_hash, |
950 | (int)hash, mode); | |
951 | if (!inode) | |
952 | goto random; | |
953 | ci = ceph_inode(inode); | |
954 | ||
955 | if (is_hash && S_ISDIR(inode->i_mode)) { | |
956 | struct ceph_inode_frag frag; | |
957 | int found; | |
958 | ||
959 | ceph_choose_frag(ci, hash, &frag, &found); | |
960 | if (found) { | |
961 | if (mode == USE_ANY_MDS && frag.ndist > 0) { | |
962 | u8 r; | |
963 | ||
964 | /* choose a random replica */ | |
965 | get_random_bytes(&r, 1); | |
966 | r %= frag.ndist; | |
967 | mds = frag.dist[r]; | |
968 | dout("choose_mds %p %llx.%llx " | |
969 | "frag %u mds%d (%d/%d)\n", | |
970 | inode, ceph_vinop(inode), | |
d66bbd44 | 971 | frag.frag, mds, |
2f2dc053 | 972 | (int)r, frag.ndist); |
d66bbd44 SW |
973 | if (ceph_mdsmap_get_state(mdsc->mdsmap, mds) >= |
974 | CEPH_MDS_STATE_ACTIVE) | |
30c71233 | 975 | goto out; |
2f2dc053 SW |
976 | } |
977 | ||
978 | /* since this file/dir wasn't known to be | |
979 | * replicated, then we want to look for the | |
980 | * authoritative mds. */ | |
981 | mode = USE_AUTH_MDS; | |
982 | if (frag.mds >= 0) { | |
983 | /* choose auth mds */ | |
984 | mds = frag.mds; | |
985 | dout("choose_mds %p %llx.%llx " | |
986 | "frag %u mds%d (auth)\n", | |
987 | inode, ceph_vinop(inode), frag.frag, mds); | |
d66bbd44 SW |
988 | if (ceph_mdsmap_get_state(mdsc->mdsmap, mds) >= |
989 | CEPH_MDS_STATE_ACTIVE) | |
30c71233 | 990 | goto out; |
2f2dc053 SW |
991 | } |
992 | } | |
993 | } | |
994 | ||
be655596 | 995 | spin_lock(&ci->i_ceph_lock); |
2f2dc053 SW |
996 | cap = NULL; |
997 | if (mode == USE_AUTH_MDS) | |
998 | cap = ci->i_auth_cap; | |
999 | if (!cap && !RB_EMPTY_ROOT(&ci->i_caps)) | |
1000 | cap = rb_entry(rb_first(&ci->i_caps), struct ceph_cap, ci_node); | |
1001 | if (!cap) { | |
be655596 | 1002 | spin_unlock(&ci->i_ceph_lock); |
3e1d0452 | 1003 | ceph_async_iput(inode); |
2f2dc053 SW |
1004 | goto random; |
1005 | } | |
1006 | mds = cap->session->s_mds; | |
1007 | dout("choose_mds %p %llx.%llx mds%d (%scap %p)\n", | |
1008 | inode, ceph_vinop(inode), mds, | |
1009 | cap == ci->i_auth_cap ? "auth " : "", cap); | |
be655596 | 1010 | spin_unlock(&ci->i_ceph_lock); |
30c71233 | 1011 | out: |
3e1d0452 YZ |
1012 | /* avoid calling iput_final() while holding mdsc->mutex or |
1013 | * in mds dispatch threads */ | |
1014 | ceph_async_iput(inode); | |
2f2dc053 SW |
1015 | return mds; |
1016 | ||
1017 | random: | |
1018 | mds = ceph_mdsmap_get_random_mds(mdsc->mdsmap); | |
1019 | dout("choose_mds chose random mds%d\n", mds); | |
1020 | return mds; | |
1021 | } | |
1022 | ||
1023 | ||
1024 | /* | |
1025 | * session messages | |
1026 | */ | |
1027 | static struct ceph_msg *create_session_msg(u32 op, u64 seq) | |
1028 | { | |
1029 | struct ceph_msg *msg; | |
1030 | struct ceph_mds_session_head *h; | |
1031 | ||
b61c2763 SW |
1032 | msg = ceph_msg_new(CEPH_MSG_CLIENT_SESSION, sizeof(*h), GFP_NOFS, |
1033 | false); | |
a79832f2 | 1034 | if (!msg) { |
2f2dc053 | 1035 | pr_err("create_session_msg ENOMEM creating msg\n"); |
a79832f2 | 1036 | return NULL; |
2f2dc053 SW |
1037 | } |
1038 | h = msg->front.iov_base; | |
1039 | h->op = cpu_to_le32(op); | |
1040 | h->seq = cpu_to_le64(seq); | |
dbd0c8bf JS |
1041 | |
1042 | return msg; | |
1043 | } | |
1044 | ||
342ce182 YZ |
1045 | static void encode_supported_features(void **p, void *end) |
1046 | { | |
1047 | static const unsigned char bits[] = CEPHFS_FEATURES_CLIENT_SUPPORTED; | |
1048 | static const size_t count = ARRAY_SIZE(bits); | |
1049 | ||
1050 | if (count > 0) { | |
1051 | size_t i; | |
1052 | size_t size = ((size_t)bits[count - 1] + 64) / 64 * 8; | |
1053 | ||
1054 | BUG_ON(*p + 4 + size > end); | |
1055 | ceph_encode_32(p, size); | |
1056 | memset(*p, 0, size); | |
1057 | for (i = 0; i < count; i++) | |
1058 | ((unsigned char*)(*p))[i / 8] |= 1 << (bits[i] % 8); | |
1059 | *p += size; | |
1060 | } else { | |
1061 | BUG_ON(*p + 4 > end); | |
1062 | ceph_encode_32(p, 0); | |
1063 | } | |
1064 | } | |
1065 | ||
dbd0c8bf JS |
1066 | /* |
1067 | * session message, specialization for CEPH_SESSION_REQUEST_OPEN | |
1068 | * to include additional client metadata fields. | |
1069 | */ | |
1070 | static struct ceph_msg *create_session_open_msg(struct ceph_mds_client *mdsc, u64 seq) | |
1071 | { | |
1072 | struct ceph_msg *msg; | |
1073 | struct ceph_mds_session_head *h; | |
1074 | int i = -1; | |
342ce182 | 1075 | int extra_bytes = 0; |
dbd0c8bf JS |
1076 | int metadata_key_count = 0; |
1077 | struct ceph_options *opt = mdsc->fsc->client->options; | |
3f384954 | 1078 | struct ceph_mount_options *fsopt = mdsc->fsc->mount_options; |
342ce182 | 1079 | void *p, *end; |
dbd0c8bf | 1080 | |
a6a5ce4f | 1081 | const char* metadata[][2] = { |
717e6f28 YZ |
1082 | {"hostname", mdsc->nodename}, |
1083 | {"kernel_version", init_utsname()->release}, | |
3f384954 YZ |
1084 | {"entity_id", opt->name ? : ""}, |
1085 | {"root", fsopt->server_path ? : "/"}, | |
dbd0c8bf JS |
1086 | {NULL, NULL} |
1087 | }; | |
1088 | ||
1089 | /* Calculate serialized length of metadata */ | |
342ce182 | 1090 | extra_bytes = 4; /* map length */ |
d37b1d99 | 1091 | for (i = 0; metadata[i][0]; ++i) { |
342ce182 | 1092 | extra_bytes += 8 + strlen(metadata[i][0]) + |
dbd0c8bf JS |
1093 | strlen(metadata[i][1]); |
1094 | metadata_key_count++; | |
1095 | } | |
342ce182 YZ |
1096 | /* supported feature */ |
1097 | extra_bytes += 4 + 8; | |
dbd0c8bf JS |
1098 | |
1099 | /* Allocate the message */ | |
342ce182 | 1100 | msg = ceph_msg_new(CEPH_MSG_CLIENT_SESSION, sizeof(*h) + extra_bytes, |
dbd0c8bf JS |
1101 | GFP_NOFS, false); |
1102 | if (!msg) { | |
1103 | pr_err("create_session_msg ENOMEM creating msg\n"); | |
1104 | return NULL; | |
1105 | } | |
342ce182 YZ |
1106 | p = msg->front.iov_base; |
1107 | end = p + msg->front.iov_len; | |
1108 | ||
1109 | h = p; | |
dbd0c8bf JS |
1110 | h->op = cpu_to_le32(CEPH_SESSION_REQUEST_OPEN); |
1111 | h->seq = cpu_to_le64(seq); | |
1112 | ||
1113 | /* | |
1114 | * Serialize client metadata into waiting buffer space, using | |
1115 | * the format that userspace expects for map<string, string> | |
7cfa0313 JS |
1116 | * |
1117 | * ClientSession messages with metadata are v2 | |
dbd0c8bf | 1118 | */ |
342ce182 | 1119 | msg->hdr.version = cpu_to_le16(3); |
7cfa0313 | 1120 | msg->hdr.compat_version = cpu_to_le16(1); |
dbd0c8bf JS |
1121 | |
1122 | /* The write pointer, following the session_head structure */ | |
342ce182 | 1123 | p += sizeof(*h); |
dbd0c8bf JS |
1124 | |
1125 | /* Number of entries in the map */ | |
1126 | ceph_encode_32(&p, metadata_key_count); | |
1127 | ||
1128 | /* Two length-prefixed strings for each entry in the map */ | |
d37b1d99 | 1129 | for (i = 0; metadata[i][0]; ++i) { |
dbd0c8bf JS |
1130 | size_t const key_len = strlen(metadata[i][0]); |
1131 | size_t const val_len = strlen(metadata[i][1]); | |
1132 | ||
1133 | ceph_encode_32(&p, key_len); | |
1134 | memcpy(p, metadata[i][0], key_len); | |
1135 | p += key_len; | |
1136 | ceph_encode_32(&p, val_len); | |
1137 | memcpy(p, metadata[i][1], val_len); | |
1138 | p += val_len; | |
1139 | } | |
1140 | ||
342ce182 YZ |
1141 | encode_supported_features(&p, end); |
1142 | msg->front.iov_len = p - msg->front.iov_base; | |
1143 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
1144 | ||
2f2dc053 SW |
1145 | return msg; |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * send session open request. | |
1150 | * | |
1151 | * called under mdsc->mutex | |
1152 | */ | |
1153 | static int __open_session(struct ceph_mds_client *mdsc, | |
1154 | struct ceph_mds_session *session) | |
1155 | { | |
1156 | struct ceph_msg *msg; | |
1157 | int mstate; | |
1158 | int mds = session->s_mds; | |
2f2dc053 SW |
1159 | |
1160 | /* wait for mds to go active? */ | |
1161 | mstate = ceph_mdsmap_get_state(mdsc->mdsmap, mds); | |
1162 | dout("open_session to mds%d (%s)\n", mds, | |
1163 | ceph_mds_state_name(mstate)); | |
1164 | session->s_state = CEPH_MDS_SESSION_OPENING; | |
1165 | session->s_renew_requested = jiffies; | |
1166 | ||
1167 | /* send connect message */ | |
dbd0c8bf | 1168 | msg = create_session_open_msg(mdsc, session->s_seq); |
a79832f2 SW |
1169 | if (!msg) |
1170 | return -ENOMEM; | |
2f2dc053 | 1171 | ceph_con_send(&session->s_con, msg); |
2f2dc053 SW |
1172 | return 0; |
1173 | } | |
1174 | ||
ed0552a1 SW |
1175 | /* |
1176 | * open sessions for any export targets for the given mds | |
1177 | * | |
1178 | * called under mdsc->mutex | |
1179 | */ | |
5d72d13c YZ |
1180 | static struct ceph_mds_session * |
1181 | __open_export_target_session(struct ceph_mds_client *mdsc, int target) | |
1182 | { | |
1183 | struct ceph_mds_session *session; | |
1184 | ||
1185 | session = __ceph_lookup_mds_session(mdsc, target); | |
1186 | if (!session) { | |
1187 | session = register_session(mdsc, target); | |
1188 | if (IS_ERR(session)) | |
1189 | return session; | |
1190 | } | |
1191 | if (session->s_state == CEPH_MDS_SESSION_NEW || | |
1192 | session->s_state == CEPH_MDS_SESSION_CLOSING) | |
1193 | __open_session(mdsc, session); | |
1194 | ||
1195 | return session; | |
1196 | } | |
1197 | ||
1198 | struct ceph_mds_session * | |
1199 | ceph_mdsc_open_export_target_session(struct ceph_mds_client *mdsc, int target) | |
1200 | { | |
1201 | struct ceph_mds_session *session; | |
1202 | ||
1203 | dout("open_export_target_session to mds%d\n", target); | |
1204 | ||
1205 | mutex_lock(&mdsc->mutex); | |
1206 | session = __open_export_target_session(mdsc, target); | |
1207 | mutex_unlock(&mdsc->mutex); | |
1208 | ||
1209 | return session; | |
1210 | } | |
1211 | ||
ed0552a1 SW |
1212 | static void __open_export_target_sessions(struct ceph_mds_client *mdsc, |
1213 | struct ceph_mds_session *session) | |
1214 | { | |
1215 | struct ceph_mds_info *mi; | |
1216 | struct ceph_mds_session *ts; | |
1217 | int i, mds = session->s_mds; | |
ed0552a1 | 1218 | |
76201b63 | 1219 | if (mds >= mdsc->mdsmap->m_num_mds) |
ed0552a1 | 1220 | return; |
5d72d13c | 1221 | |
ed0552a1 SW |
1222 | mi = &mdsc->mdsmap->m_info[mds]; |
1223 | dout("open_export_target_sessions for mds%d (%d targets)\n", | |
1224 | session->s_mds, mi->num_export_targets); | |
1225 | ||
1226 | for (i = 0; i < mi->num_export_targets; i++) { | |
5d72d13c YZ |
1227 | ts = __open_export_target_session(mdsc, mi->export_targets[i]); |
1228 | if (!IS_ERR(ts)) | |
1229 | ceph_put_mds_session(ts); | |
ed0552a1 SW |
1230 | } |
1231 | } | |
1232 | ||
154f42c2 SW |
1233 | void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client *mdsc, |
1234 | struct ceph_mds_session *session) | |
1235 | { | |
1236 | mutex_lock(&mdsc->mutex); | |
1237 | __open_export_target_sessions(mdsc, session); | |
1238 | mutex_unlock(&mdsc->mutex); | |
1239 | } | |
1240 | ||
2f2dc053 SW |
1241 | /* |
1242 | * session caps | |
1243 | */ | |
1244 | ||
c8a96a31 JL |
1245 | static void detach_cap_releases(struct ceph_mds_session *session, |
1246 | struct list_head *target) | |
2f2dc053 | 1247 | { |
c8a96a31 JL |
1248 | lockdep_assert_held(&session->s_cap_lock); |
1249 | ||
1250 | list_splice_init(&session->s_cap_releases, target); | |
745a8e3b | 1251 | session->s_num_cap_releases = 0; |
c8a96a31 JL |
1252 | dout("dispose_cap_releases mds%d\n", session->s_mds); |
1253 | } | |
2f2dc053 | 1254 | |
c8a96a31 JL |
1255 | static void dispose_cap_releases(struct ceph_mds_client *mdsc, |
1256 | struct list_head *dispose) | |
1257 | { | |
1258 | while (!list_empty(dispose)) { | |
745a8e3b YZ |
1259 | struct ceph_cap *cap; |
1260 | /* zero out the in-progress message */ | |
c8a96a31 | 1261 | cap = list_first_entry(dispose, struct ceph_cap, session_caps); |
745a8e3b YZ |
1262 | list_del(&cap->session_caps); |
1263 | ceph_put_cap(mdsc, cap); | |
2f2dc053 | 1264 | } |
2f2dc053 SW |
1265 | } |
1266 | ||
1c841a96 YZ |
1267 | static void cleanup_session_requests(struct ceph_mds_client *mdsc, |
1268 | struct ceph_mds_session *session) | |
1269 | { | |
1270 | struct ceph_mds_request *req; | |
1271 | struct rb_node *p; | |
f4b97866 | 1272 | struct ceph_inode_info *ci; |
1c841a96 YZ |
1273 | |
1274 | dout("cleanup_session_requests mds%d\n", session->s_mds); | |
1275 | mutex_lock(&mdsc->mutex); | |
1276 | while (!list_empty(&session->s_unsafe)) { | |
1277 | req = list_first_entry(&session->s_unsafe, | |
1278 | struct ceph_mds_request, r_unsafe_item); | |
3e0708b9 YZ |
1279 | pr_warn_ratelimited(" dropping unsafe request %llu\n", |
1280 | req->r_tid); | |
f4b97866 YZ |
1281 | if (req->r_target_inode) { |
1282 | /* dropping unsafe change of inode's attributes */ | |
1283 | ci = ceph_inode(req->r_target_inode); | |
1284 | errseq_set(&ci->i_meta_err, -EIO); | |
1285 | } | |
1286 | if (req->r_unsafe_dir) { | |
1287 | /* dropping unsafe directory operation */ | |
1288 | ci = ceph_inode(req->r_unsafe_dir); | |
1289 | errseq_set(&ci->i_meta_err, -EIO); | |
1290 | } | |
1c841a96 YZ |
1291 | __unregister_request(mdsc, req); |
1292 | } | |
1293 | /* zero r_attempts, so kick_requests() will re-send requests */ | |
1294 | p = rb_first(&mdsc->request_tree); | |
1295 | while (p) { | |
1296 | req = rb_entry(p, struct ceph_mds_request, r_node); | |
1297 | p = rb_next(p); | |
1298 | if (req->r_session && | |
1299 | req->r_session->s_mds == session->s_mds) | |
1300 | req->r_attempts = 0; | |
1301 | } | |
1302 | mutex_unlock(&mdsc->mutex); | |
1303 | } | |
1304 | ||
2f2dc053 | 1305 | /* |
f818a736 SW |
1306 | * Helper to safely iterate over all caps associated with a session, with |
1307 | * special care taken to handle a racing __ceph_remove_cap(). | |
2f2dc053 | 1308 | * |
f818a736 | 1309 | * Caller must hold session s_mutex. |
2f2dc053 | 1310 | */ |
f5d77269 JL |
1311 | int ceph_iterate_session_caps(struct ceph_mds_session *session, |
1312 | int (*cb)(struct inode *, struct ceph_cap *, | |
1313 | void *), void *arg) | |
2f2dc053 | 1314 | { |
7c1332b8 SW |
1315 | struct list_head *p; |
1316 | struct ceph_cap *cap; | |
1317 | struct inode *inode, *last_inode = NULL; | |
1318 | struct ceph_cap *old_cap = NULL; | |
2f2dc053 SW |
1319 | int ret; |
1320 | ||
1321 | dout("iterate_session_caps %p mds%d\n", session, session->s_mds); | |
1322 | spin_lock(&session->s_cap_lock); | |
7c1332b8 SW |
1323 | p = session->s_caps.next; |
1324 | while (p != &session->s_caps) { | |
1325 | cap = list_entry(p, struct ceph_cap, session_caps); | |
2f2dc053 | 1326 | inode = igrab(&cap->ci->vfs_inode); |
7c1332b8 SW |
1327 | if (!inode) { |
1328 | p = p->next; | |
2f2dc053 | 1329 | continue; |
7c1332b8 SW |
1330 | } |
1331 | session->s_cap_iterator = cap; | |
2f2dc053 | 1332 | spin_unlock(&session->s_cap_lock); |
7c1332b8 SW |
1333 | |
1334 | if (last_inode) { | |
3e1d0452 YZ |
1335 | /* avoid calling iput_final() while holding |
1336 | * s_mutex or in mds dispatch threads */ | |
1337 | ceph_async_iput(last_inode); | |
7c1332b8 SW |
1338 | last_inode = NULL; |
1339 | } | |
1340 | if (old_cap) { | |
37151668 | 1341 | ceph_put_cap(session->s_mdsc, old_cap); |
7c1332b8 SW |
1342 | old_cap = NULL; |
1343 | } | |
1344 | ||
2f2dc053 | 1345 | ret = cb(inode, cap, arg); |
7c1332b8 SW |
1346 | last_inode = inode; |
1347 | ||
2f2dc053 | 1348 | spin_lock(&session->s_cap_lock); |
7c1332b8 | 1349 | p = p->next; |
d37b1d99 | 1350 | if (!cap->ci) { |
7c1332b8 SW |
1351 | dout("iterate_session_caps finishing cap %p removal\n", |
1352 | cap); | |
1353 | BUG_ON(cap->session != session); | |
745a8e3b | 1354 | cap->session = NULL; |
7c1332b8 SW |
1355 | list_del_init(&cap->session_caps); |
1356 | session->s_nr_caps--; | |
e3ec8d68 YZ |
1357 | if (cap->queue_release) |
1358 | __ceph_queue_cap_release(session, cap); | |
1359 | else | |
745a8e3b | 1360 | old_cap = cap; /* put_cap it w/o locks held */ |
7c1332b8 | 1361 | } |
5dacf091 SW |
1362 | if (ret < 0) |
1363 | goto out; | |
2f2dc053 | 1364 | } |
5dacf091 SW |
1365 | ret = 0; |
1366 | out: | |
7c1332b8 | 1367 | session->s_cap_iterator = NULL; |
2f2dc053 | 1368 | spin_unlock(&session->s_cap_lock); |
7c1332b8 | 1369 | |
3e1d0452 | 1370 | ceph_async_iput(last_inode); |
7c1332b8 | 1371 | if (old_cap) |
37151668 | 1372 | ceph_put_cap(session->s_mdsc, old_cap); |
7c1332b8 | 1373 | |
5dacf091 | 1374 | return ret; |
2f2dc053 SW |
1375 | } |
1376 | ||
1377 | static int remove_session_caps_cb(struct inode *inode, struct ceph_cap *cap, | |
6c99f254 | 1378 | void *arg) |
2f2dc053 | 1379 | { |
6c93df5d | 1380 | struct ceph_fs_client *fsc = (struct ceph_fs_client *)arg; |
2f2dc053 | 1381 | struct ceph_inode_info *ci = ceph_inode(inode); |
553adfd9 | 1382 | LIST_HEAD(to_remove); |
f4b97866 | 1383 | bool dirty_dropped = false; |
6c93df5d | 1384 | bool invalidate = false; |
6c99f254 | 1385 | |
2f2dc053 SW |
1386 | dout("removing cap %p, ci is %p, inode is %p\n", |
1387 | cap, ci, &ci->vfs_inode); | |
be655596 | 1388 | spin_lock(&ci->i_ceph_lock); |
d2f8bb27 YZ |
1389 | if (cap->mds_wanted | cap->issued) |
1390 | ci->i_ceph_flags |= CEPH_I_CAP_DROPPED; | |
a096b09a | 1391 | __ceph_remove_cap(cap, false); |
571ade33 | 1392 | if (!ci->i_auth_cap) { |
553adfd9 | 1393 | struct ceph_cap_flush *cf; |
6c93df5d | 1394 | struct ceph_mds_client *mdsc = fsc->mdsc; |
6c99f254 | 1395 | |
d468e729 YZ |
1396 | if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) { |
1397 | if (inode->i_data.nrpages > 0) | |
1398 | invalidate = true; | |
1399 | if (ci->i_wrbuffer_ref > 0) | |
1400 | mapping_set_error(&inode->i_data, -EIO); | |
1401 | } | |
6c93df5d | 1402 | |
e4500b5e YZ |
1403 | while (!list_empty(&ci->i_cap_flush_list)) { |
1404 | cf = list_first_entry(&ci->i_cap_flush_list, | |
1405 | struct ceph_cap_flush, i_list); | |
8cdcc07d | 1406 | list_move(&cf->i_list, &to_remove); |
553adfd9 YZ |
1407 | } |
1408 | ||
6c99f254 | 1409 | spin_lock(&mdsc->cap_dirty_lock); |
8310b089 | 1410 | |
e4500b5e YZ |
1411 | list_for_each_entry(cf, &to_remove, i_list) |
1412 | list_del(&cf->g_list); | |
8310b089 | 1413 | |
6c99f254 | 1414 | if (!list_empty(&ci->i_dirty_item)) { |
3e0708b9 YZ |
1415 | pr_warn_ratelimited( |
1416 | " dropping dirty %s state for %p %lld\n", | |
6c99f254 SW |
1417 | ceph_cap_string(ci->i_dirty_caps), |
1418 | inode, ceph_ino(inode)); | |
1419 | ci->i_dirty_caps = 0; | |
1420 | list_del_init(&ci->i_dirty_item); | |
f4b97866 | 1421 | dirty_dropped = true; |
6c99f254 SW |
1422 | } |
1423 | if (!list_empty(&ci->i_flushing_item)) { | |
3e0708b9 YZ |
1424 | pr_warn_ratelimited( |
1425 | " dropping dirty+flushing %s state for %p %lld\n", | |
6c99f254 SW |
1426 | ceph_cap_string(ci->i_flushing_caps), |
1427 | inode, ceph_ino(inode)); | |
1428 | ci->i_flushing_caps = 0; | |
1429 | list_del_init(&ci->i_flushing_item); | |
1430 | mdsc->num_cap_flushing--; | |
f4b97866 | 1431 | dirty_dropped = true; |
6c99f254 | 1432 | } |
6c99f254 | 1433 | spin_unlock(&mdsc->cap_dirty_lock); |
553adfd9 | 1434 | |
f4b97866 YZ |
1435 | if (dirty_dropped) { |
1436 | errseq_set(&ci->i_meta_err, -EIO); | |
1437 | ||
1438 | if (ci->i_wrbuffer_ref_head == 0 && | |
1439 | ci->i_wr_ref == 0 && | |
1440 | ci->i_dirty_caps == 0 && | |
1441 | ci->i_flushing_caps == 0) { | |
1442 | ceph_put_snap_context(ci->i_head_snapc); | |
1443 | ci->i_head_snapc = NULL; | |
1444 | } | |
1445 | } | |
1446 | ||
b3f8d68f YZ |
1447 | if (atomic_read(&ci->i_filelock_ref) > 0) { |
1448 | /* make further file lock syscall return -EIO */ | |
1449 | ci->i_ceph_flags |= CEPH_I_ERROR_FILELOCK; | |
1450 | pr_warn_ratelimited(" dropping file locks for %p %lld\n", | |
1451 | inode, ceph_ino(inode)); | |
1452 | } | |
1453 | ||
f66fd9f0 | 1454 | if (!ci->i_dirty_caps && ci->i_prealloc_cap_flush) { |
e4500b5e | 1455 | list_add(&ci->i_prealloc_cap_flush->i_list, &to_remove); |
f66fd9f0 YZ |
1456 | ci->i_prealloc_cap_flush = NULL; |
1457 | } | |
6c99f254 | 1458 | } |
be655596 | 1459 | spin_unlock(&ci->i_ceph_lock); |
553adfd9 YZ |
1460 | while (!list_empty(&to_remove)) { |
1461 | struct ceph_cap_flush *cf; | |
1462 | cf = list_first_entry(&to_remove, | |
e4500b5e YZ |
1463 | struct ceph_cap_flush, i_list); |
1464 | list_del(&cf->i_list); | |
f66fd9f0 | 1465 | ceph_free_cap_flush(cf); |
553adfd9 | 1466 | } |
77310320 YZ |
1467 | |
1468 | wake_up_all(&ci->i_cap_wq); | |
6c93df5d YZ |
1469 | if (invalidate) |
1470 | ceph_queue_invalidate(inode); | |
f4b97866 | 1471 | if (dirty_dropped) |
6c99f254 | 1472 | iput(inode); |
2f2dc053 SW |
1473 | return 0; |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | * caller must hold session s_mutex | |
1478 | */ | |
1479 | static void remove_session_caps(struct ceph_mds_session *session) | |
1480 | { | |
6c93df5d YZ |
1481 | struct ceph_fs_client *fsc = session->s_mdsc->fsc; |
1482 | struct super_block *sb = fsc->sb; | |
c8a96a31 JL |
1483 | LIST_HEAD(dispose); |
1484 | ||
2f2dc053 | 1485 | dout("remove_session_caps on %p\n", session); |
f5d77269 | 1486 | ceph_iterate_session_caps(session, remove_session_caps_cb, fsc); |
6f60f889 | 1487 | |
c8799fc4 YZ |
1488 | wake_up_all(&fsc->mdsc->cap_flushing_wq); |
1489 | ||
6f60f889 YZ |
1490 | spin_lock(&session->s_cap_lock); |
1491 | if (session->s_nr_caps > 0) { | |
6f60f889 YZ |
1492 | struct inode *inode; |
1493 | struct ceph_cap *cap, *prev = NULL; | |
1494 | struct ceph_vino vino; | |
1495 | /* | |
1496 | * iterate_session_caps() skips inodes that are being | |
1497 | * deleted, we need to wait until deletions are complete. | |
1498 | * __wait_on_freeing_inode() is designed for the job, | |
1499 | * but it is not exported, so use lookup inode function | |
1500 | * to access it. | |
1501 | */ | |
1502 | while (!list_empty(&session->s_caps)) { | |
1503 | cap = list_entry(session->s_caps.next, | |
1504 | struct ceph_cap, session_caps); | |
1505 | if (cap == prev) | |
1506 | break; | |
1507 | prev = cap; | |
1508 | vino = cap->ci->i_vino; | |
1509 | spin_unlock(&session->s_cap_lock); | |
1510 | ||
ed284c49 | 1511 | inode = ceph_find_inode(sb, vino); |
3e1d0452 YZ |
1512 | /* avoid calling iput_final() while holding s_mutex */ |
1513 | ceph_async_iput(inode); | |
6f60f889 YZ |
1514 | |
1515 | spin_lock(&session->s_cap_lock); | |
1516 | } | |
1517 | } | |
745a8e3b YZ |
1518 | |
1519 | // drop cap expires and unlock s_cap_lock | |
c8a96a31 | 1520 | detach_cap_releases(session, &dispose); |
6f60f889 | 1521 | |
2f2dc053 | 1522 | BUG_ON(session->s_nr_caps > 0); |
6c99f254 | 1523 | BUG_ON(!list_empty(&session->s_cap_flushing)); |
c8a96a31 JL |
1524 | spin_unlock(&session->s_cap_lock); |
1525 | dispose_cap_releases(session->s_mdsc, &dispose); | |
2f2dc053 SW |
1526 | } |
1527 | ||
d2f8bb27 YZ |
1528 | enum { |
1529 | RECONNECT, | |
1530 | RENEWCAPS, | |
1531 | FORCE_RO, | |
1532 | }; | |
1533 | ||
2f2dc053 SW |
1534 | /* |
1535 | * wake up any threads waiting on this session's caps. if the cap is | |
1536 | * old (didn't get renewed on the client reconnect), remove it now. | |
1537 | * | |
1538 | * caller must hold s_mutex. | |
1539 | */ | |
1540 | static int wake_up_session_cb(struct inode *inode, struct ceph_cap *cap, | |
1541 | void *arg) | |
1542 | { | |
0dc2570f | 1543 | struct ceph_inode_info *ci = ceph_inode(inode); |
d2f8bb27 | 1544 | unsigned long ev = (unsigned long)arg; |
0dc2570f | 1545 | |
d2f8bb27 | 1546 | if (ev == RECONNECT) { |
be655596 | 1547 | spin_lock(&ci->i_ceph_lock); |
0dc2570f SW |
1548 | ci->i_wanted_max_size = 0; |
1549 | ci->i_requested_max_size = 0; | |
be655596 | 1550 | spin_unlock(&ci->i_ceph_lock); |
d2f8bb27 YZ |
1551 | } else if (ev == RENEWCAPS) { |
1552 | if (cap->cap_gen < cap->session->s_cap_gen) { | |
1553 | /* mds did not re-issue stale cap */ | |
1554 | spin_lock(&ci->i_ceph_lock); | |
1555 | cap->issued = cap->implemented = CEPH_CAP_PIN; | |
1556 | /* make sure mds knows what we want */ | |
1557 | if (__ceph_caps_file_wanted(ci) & ~cap->mds_wanted) | |
1558 | ci->i_ceph_flags |= CEPH_I_CAP_DROPPED; | |
1559 | spin_unlock(&ci->i_ceph_lock); | |
1560 | } | |
1561 | } else if (ev == FORCE_RO) { | |
0dc2570f | 1562 | } |
e5360309 | 1563 | wake_up_all(&ci->i_cap_wq); |
2f2dc053 SW |
1564 | return 0; |
1565 | } | |
1566 | ||
d2f8bb27 | 1567 | static void wake_up_session_caps(struct ceph_mds_session *session, int ev) |
2f2dc053 SW |
1568 | { |
1569 | dout("wake_up_session_caps %p mds%d\n", session, session->s_mds); | |
f5d77269 JL |
1570 | ceph_iterate_session_caps(session, wake_up_session_cb, |
1571 | (void *)(unsigned long)ev); | |
2f2dc053 SW |
1572 | } |
1573 | ||
1574 | /* | |
1575 | * Send periodic message to MDS renewing all currently held caps. The | |
1576 | * ack will reset the expiration for all caps from this session. | |
1577 | * | |
1578 | * caller holds s_mutex | |
1579 | */ | |
1580 | static int send_renew_caps(struct ceph_mds_client *mdsc, | |
1581 | struct ceph_mds_session *session) | |
1582 | { | |
1583 | struct ceph_msg *msg; | |
1584 | int state; | |
1585 | ||
1586 | if (time_after_eq(jiffies, session->s_cap_ttl) && | |
1587 | time_after_eq(session->s_cap_ttl, session->s_renew_requested)) | |
1588 | pr_info("mds%d caps stale\n", session->s_mds); | |
e4cb4cb8 | 1589 | session->s_renew_requested = jiffies; |
2f2dc053 SW |
1590 | |
1591 | /* do not try to renew caps until a recovering mds has reconnected | |
1592 | * with its clients. */ | |
1593 | state = ceph_mdsmap_get_state(mdsc->mdsmap, session->s_mds); | |
1594 | if (state < CEPH_MDS_STATE_RECONNECT) { | |
1595 | dout("send_renew_caps ignoring mds%d (%s)\n", | |
1596 | session->s_mds, ceph_mds_state_name(state)); | |
1597 | return 0; | |
1598 | } | |
1599 | ||
1600 | dout("send_renew_caps to mds%d (%s)\n", session->s_mds, | |
1601 | ceph_mds_state_name(state)); | |
2f2dc053 SW |
1602 | msg = create_session_msg(CEPH_SESSION_REQUEST_RENEWCAPS, |
1603 | ++session->s_renew_seq); | |
a79832f2 SW |
1604 | if (!msg) |
1605 | return -ENOMEM; | |
2f2dc053 SW |
1606 | ceph_con_send(&session->s_con, msg); |
1607 | return 0; | |
1608 | } | |
1609 | ||
186e4f7a YZ |
1610 | static int send_flushmsg_ack(struct ceph_mds_client *mdsc, |
1611 | struct ceph_mds_session *session, u64 seq) | |
1612 | { | |
1613 | struct ceph_msg *msg; | |
1614 | ||
1615 | dout("send_flushmsg_ack to mds%d (%s)s seq %lld\n", | |
a687ecaf | 1616 | session->s_mds, ceph_session_state_name(session->s_state), seq); |
186e4f7a YZ |
1617 | msg = create_session_msg(CEPH_SESSION_FLUSHMSG_ACK, seq); |
1618 | if (!msg) | |
1619 | return -ENOMEM; | |
1620 | ceph_con_send(&session->s_con, msg); | |
1621 | return 0; | |
1622 | } | |
1623 | ||
1624 | ||
2f2dc053 SW |
1625 | /* |
1626 | * Note new cap ttl, and any transition from stale -> not stale (fresh?). | |
0dc2570f SW |
1627 | * |
1628 | * Called under session->s_mutex | |
2f2dc053 SW |
1629 | */ |
1630 | static void renewed_caps(struct ceph_mds_client *mdsc, | |
1631 | struct ceph_mds_session *session, int is_renew) | |
1632 | { | |
1633 | int was_stale; | |
1634 | int wake = 0; | |
1635 | ||
1636 | spin_lock(&session->s_cap_lock); | |
1ce208a6 | 1637 | was_stale = is_renew && time_after_eq(jiffies, session->s_cap_ttl); |
2f2dc053 SW |
1638 | |
1639 | session->s_cap_ttl = session->s_renew_requested + | |
1640 | mdsc->mdsmap->m_session_timeout*HZ; | |
1641 | ||
1642 | if (was_stale) { | |
1643 | if (time_before(jiffies, session->s_cap_ttl)) { | |
1644 | pr_info("mds%d caps renewed\n", session->s_mds); | |
1645 | wake = 1; | |
1646 | } else { | |
1647 | pr_info("mds%d caps still stale\n", session->s_mds); | |
1648 | } | |
1649 | } | |
1650 | dout("renewed_caps mds%d ttl now %lu, was %s, now %s\n", | |
1651 | session->s_mds, session->s_cap_ttl, was_stale ? "stale" : "fresh", | |
1652 | time_before(jiffies, session->s_cap_ttl) ? "stale" : "fresh"); | |
1653 | spin_unlock(&session->s_cap_lock); | |
1654 | ||
1655 | if (wake) | |
d2f8bb27 | 1656 | wake_up_session_caps(session, RENEWCAPS); |
2f2dc053 SW |
1657 | } |
1658 | ||
1659 | /* | |
1660 | * send a session close request | |
1661 | */ | |
1662 | static int request_close_session(struct ceph_mds_client *mdsc, | |
1663 | struct ceph_mds_session *session) | |
1664 | { | |
1665 | struct ceph_msg *msg; | |
2f2dc053 SW |
1666 | |
1667 | dout("request_close_session mds%d state %s seq %lld\n", | |
a687ecaf | 1668 | session->s_mds, ceph_session_state_name(session->s_state), |
2f2dc053 SW |
1669 | session->s_seq); |
1670 | msg = create_session_msg(CEPH_SESSION_REQUEST_CLOSE, session->s_seq); | |
a79832f2 SW |
1671 | if (!msg) |
1672 | return -ENOMEM; | |
1673 | ceph_con_send(&session->s_con, msg); | |
fcff415c | 1674 | return 1; |
2f2dc053 SW |
1675 | } |
1676 | ||
1677 | /* | |
1678 | * Called with s_mutex held. | |
1679 | */ | |
1680 | static int __close_session(struct ceph_mds_client *mdsc, | |
1681 | struct ceph_mds_session *session) | |
1682 | { | |
1683 | if (session->s_state >= CEPH_MDS_SESSION_CLOSING) | |
1684 | return 0; | |
1685 | session->s_state = CEPH_MDS_SESSION_CLOSING; | |
1686 | return request_close_session(mdsc, session); | |
1687 | } | |
1688 | ||
040d7860 YZ |
1689 | static bool drop_negative_children(struct dentry *dentry) |
1690 | { | |
1691 | struct dentry *child; | |
1692 | bool all_negative = true; | |
1693 | ||
1694 | if (!d_is_dir(dentry)) | |
1695 | goto out; | |
1696 | ||
1697 | spin_lock(&dentry->d_lock); | |
1698 | list_for_each_entry(child, &dentry->d_subdirs, d_child) { | |
1699 | if (d_really_is_positive(child)) { | |
1700 | all_negative = false; | |
1701 | break; | |
1702 | } | |
1703 | } | |
1704 | spin_unlock(&dentry->d_lock); | |
1705 | ||
1706 | if (all_negative) | |
1707 | shrink_dcache_parent(dentry); | |
1708 | out: | |
1709 | return all_negative; | |
1710 | } | |
1711 | ||
2f2dc053 SW |
1712 | /* |
1713 | * Trim old(er) caps. | |
1714 | * | |
1715 | * Because we can't cache an inode without one or more caps, we do | |
1716 | * this indirectly: if a cap is unused, we prune its aliases, at which | |
1717 | * point the inode will hopefully get dropped to. | |
1718 | * | |
1719 | * Yes, this is a bit sloppy. Our only real goal here is to respond to | |
1720 | * memory pressure from the MDS, though, so it needn't be perfect. | |
1721 | */ | |
1722 | static int trim_caps_cb(struct inode *inode, struct ceph_cap *cap, void *arg) | |
1723 | { | |
533a2818 | 1724 | int *remaining = arg; |
2f2dc053 | 1725 | struct ceph_inode_info *ci = ceph_inode(inode); |
979abfdd | 1726 | int used, wanted, oissued, mine; |
2f2dc053 | 1727 | |
533a2818 | 1728 | if (*remaining <= 0) |
2f2dc053 SW |
1729 | return -1; |
1730 | ||
be655596 | 1731 | spin_lock(&ci->i_ceph_lock); |
2f2dc053 SW |
1732 | mine = cap->issued | cap->implemented; |
1733 | used = __ceph_caps_used(ci); | |
979abfdd | 1734 | wanted = __ceph_caps_file_wanted(ci); |
2f2dc053 SW |
1735 | oissued = __ceph_caps_issued_other(ci, cap); |
1736 | ||
979abfdd | 1737 | dout("trim_caps_cb %p cap %p mine %s oissued %s used %s wanted %s\n", |
2f2dc053 | 1738 | inode, cap, ceph_cap_string(mine), ceph_cap_string(oissued), |
979abfdd YZ |
1739 | ceph_cap_string(used), ceph_cap_string(wanted)); |
1740 | if (cap == ci->i_auth_cap) { | |
622f3e25 YZ |
1741 | if (ci->i_dirty_caps || ci->i_flushing_caps || |
1742 | !list_empty(&ci->i_cap_snaps)) | |
979abfdd YZ |
1743 | goto out; |
1744 | if ((used | wanted) & CEPH_CAP_ANY_WR) | |
1745 | goto out; | |
89aa5930 YZ |
1746 | /* Note: it's possible that i_filelock_ref becomes non-zero |
1747 | * after dropping auth caps. It doesn't hurt because reply | |
1748 | * of lock mds request will re-add auth caps. */ | |
1749 | if (atomic_read(&ci->i_filelock_ref) > 0) | |
1750 | goto out; | |
979abfdd | 1751 | } |
5e804ac4 YZ |
1752 | /* The inode has cached pages, but it's no longer used. |
1753 | * we can safely drop it */ | |
1754 | if (wanted == 0 && used == CEPH_CAP_FILE_CACHE && | |
1755 | !(oissued & CEPH_CAP_FILE_CACHE)) { | |
1756 | used = 0; | |
1757 | oissued = 0; | |
1758 | } | |
979abfdd | 1759 | if ((used | wanted) & ~oissued & mine) |
2f2dc053 SW |
1760 | goto out; /* we need these caps */ |
1761 | ||
2f2dc053 SW |
1762 | if (oissued) { |
1763 | /* we aren't the only cap.. just remove us */ | |
a096b09a | 1764 | __ceph_remove_cap(cap, true); |
533a2818 | 1765 | (*remaining)--; |
2f2dc053 | 1766 | } else { |
040d7860 | 1767 | struct dentry *dentry; |
5e804ac4 | 1768 | /* try dropping referring dentries */ |
be655596 | 1769 | spin_unlock(&ci->i_ceph_lock); |
040d7860 YZ |
1770 | dentry = d_find_any_alias(inode); |
1771 | if (dentry && drop_negative_children(dentry)) { | |
1772 | int count; | |
1773 | dput(dentry); | |
1774 | d_prune_aliases(inode); | |
1775 | count = atomic_read(&inode->i_count); | |
1776 | if (count == 1) | |
533a2818 | 1777 | (*remaining)--; |
040d7860 YZ |
1778 | dout("trim_caps_cb %p cap %p pruned, count now %d\n", |
1779 | inode, cap, count); | |
1780 | } else { | |
1781 | dput(dentry); | |
1782 | } | |
2f2dc053 SW |
1783 | return 0; |
1784 | } | |
1785 | ||
1786 | out: | |
be655596 | 1787 | spin_unlock(&ci->i_ceph_lock); |
2f2dc053 SW |
1788 | return 0; |
1789 | } | |
1790 | ||
1791 | /* | |
1792 | * Trim session cap count down to some max number. | |
1793 | */ | |
e30ee581 ZZ |
1794 | int ceph_trim_caps(struct ceph_mds_client *mdsc, |
1795 | struct ceph_mds_session *session, | |
1796 | int max_caps) | |
2f2dc053 SW |
1797 | { |
1798 | int trim_caps = session->s_nr_caps - max_caps; | |
1799 | ||
1800 | dout("trim_caps mds%d start: %d / %d, trim %d\n", | |
1801 | session->s_mds, session->s_nr_caps, max_caps, trim_caps); | |
1802 | if (trim_caps > 0) { | |
533a2818 JL |
1803 | int remaining = trim_caps; |
1804 | ||
1805 | ceph_iterate_session_caps(session, trim_caps_cb, &remaining); | |
2f2dc053 SW |
1806 | dout("trim_caps mds%d done: %d / %d, trimmed %d\n", |
1807 | session->s_mds, session->s_nr_caps, max_caps, | |
533a2818 | 1808 | trim_caps - remaining); |
2f2dc053 | 1809 | } |
a56371d9 | 1810 | |
e3ec8d68 | 1811 | ceph_flush_cap_releases(mdsc, session); |
2f2dc053 SW |
1812 | return 0; |
1813 | } | |
1814 | ||
8310b089 YZ |
1815 | static int check_caps_flush(struct ceph_mds_client *mdsc, |
1816 | u64 want_flush_tid) | |
1817 | { | |
8310b089 YZ |
1818 | int ret = 1; |
1819 | ||
1820 | spin_lock(&mdsc->cap_dirty_lock); | |
e4500b5e YZ |
1821 | if (!list_empty(&mdsc->cap_flush_list)) { |
1822 | struct ceph_cap_flush *cf = | |
1823 | list_first_entry(&mdsc->cap_flush_list, | |
1824 | struct ceph_cap_flush, g_list); | |
1825 | if (cf->tid <= want_flush_tid) { | |
1826 | dout("check_caps_flush still flushing tid " | |
1827 | "%llu <= %llu\n", cf->tid, want_flush_tid); | |
1828 | ret = 0; | |
1829 | } | |
8310b089 YZ |
1830 | } |
1831 | spin_unlock(&mdsc->cap_dirty_lock); | |
1832 | return ret; | |
d3383a8e YZ |
1833 | } |
1834 | ||
2f2dc053 SW |
1835 | /* |
1836 | * flush all dirty inode data to disk. | |
1837 | * | |
8310b089 | 1838 | * returns true if we've flushed through want_flush_tid |
2f2dc053 | 1839 | */ |
affbc19a | 1840 | static void wait_caps_flush(struct ceph_mds_client *mdsc, |
0e294387 | 1841 | u64 want_flush_tid) |
2f2dc053 | 1842 | { |
0e294387 | 1843 | dout("check_caps_flush want %llu\n", want_flush_tid); |
8310b089 YZ |
1844 | |
1845 | wait_event(mdsc->cap_flushing_wq, | |
1846 | check_caps_flush(mdsc, want_flush_tid)); | |
1847 | ||
1848 | dout("check_caps_flush ok, flushed thru %llu\n", want_flush_tid); | |
2f2dc053 SW |
1849 | } |
1850 | ||
1851 | /* | |
1852 | * called under s_mutex | |
1853 | */ | |
e3ec8d68 YZ |
1854 | static void ceph_send_cap_releases(struct ceph_mds_client *mdsc, |
1855 | struct ceph_mds_session *session) | |
2f2dc053 | 1856 | { |
745a8e3b YZ |
1857 | struct ceph_msg *msg = NULL; |
1858 | struct ceph_mds_cap_release *head; | |
1859 | struct ceph_mds_cap_item *item; | |
92475f05 | 1860 | struct ceph_osd_client *osdc = &mdsc->fsc->client->osdc; |
745a8e3b YZ |
1861 | struct ceph_cap *cap; |
1862 | LIST_HEAD(tmp_list); | |
1863 | int num_cap_releases; | |
92475f05 JL |
1864 | __le32 barrier, *cap_barrier; |
1865 | ||
1866 | down_read(&osdc->lock); | |
1867 | barrier = cpu_to_le32(osdc->epoch_barrier); | |
1868 | up_read(&osdc->lock); | |
2f2dc053 | 1869 | |
0f8605f2 | 1870 | spin_lock(&session->s_cap_lock); |
745a8e3b YZ |
1871 | again: |
1872 | list_splice_init(&session->s_cap_releases, &tmp_list); | |
1873 | num_cap_releases = session->s_num_cap_releases; | |
1874 | session->s_num_cap_releases = 0; | |
2f2dc053 | 1875 | spin_unlock(&session->s_cap_lock); |
e01a5946 | 1876 | |
745a8e3b YZ |
1877 | while (!list_empty(&tmp_list)) { |
1878 | if (!msg) { | |
1879 | msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPRELEASE, | |
09cbfeaf | 1880 | PAGE_SIZE, GFP_NOFS, false); |
745a8e3b YZ |
1881 | if (!msg) |
1882 | goto out_err; | |
1883 | head = msg->front.iov_base; | |
1884 | head->num = cpu_to_le32(0); | |
1885 | msg->front.iov_len = sizeof(*head); | |
92475f05 JL |
1886 | |
1887 | msg->hdr.version = cpu_to_le16(2); | |
1888 | msg->hdr.compat_version = cpu_to_le16(1); | |
745a8e3b | 1889 | } |
92475f05 | 1890 | |
745a8e3b YZ |
1891 | cap = list_first_entry(&tmp_list, struct ceph_cap, |
1892 | session_caps); | |
1893 | list_del(&cap->session_caps); | |
1894 | num_cap_releases--; | |
e01a5946 | 1895 | |
00bd8edb | 1896 | head = msg->front.iov_base; |
4198aba4 JL |
1897 | put_unaligned_le32(get_unaligned_le32(&head->num) + 1, |
1898 | &head->num); | |
745a8e3b YZ |
1899 | item = msg->front.iov_base + msg->front.iov_len; |
1900 | item->ino = cpu_to_le64(cap->cap_ino); | |
1901 | item->cap_id = cpu_to_le64(cap->cap_id); | |
1902 | item->migrate_seq = cpu_to_le32(cap->mseq); | |
1903 | item->seq = cpu_to_le32(cap->issue_seq); | |
1904 | msg->front.iov_len += sizeof(*item); | |
1905 | ||
1906 | ceph_put_cap(mdsc, cap); | |
1907 | ||
1908 | if (le32_to_cpu(head->num) == CEPH_CAPS_PER_RELEASE) { | |
92475f05 JL |
1909 | // Append cap_barrier field |
1910 | cap_barrier = msg->front.iov_base + msg->front.iov_len; | |
1911 | *cap_barrier = barrier; | |
1912 | msg->front.iov_len += sizeof(*cap_barrier); | |
1913 | ||
745a8e3b YZ |
1914 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); |
1915 | dout("send_cap_releases mds%d %p\n", session->s_mds, msg); | |
1916 | ceph_con_send(&session->s_con, msg); | |
1917 | msg = NULL; | |
1918 | } | |
00bd8edb | 1919 | } |
e01a5946 | 1920 | |
745a8e3b | 1921 | BUG_ON(num_cap_releases != 0); |
e01a5946 | 1922 | |
745a8e3b YZ |
1923 | spin_lock(&session->s_cap_lock); |
1924 | if (!list_empty(&session->s_cap_releases)) | |
1925 | goto again; | |
1926 | spin_unlock(&session->s_cap_lock); | |
1927 | ||
1928 | if (msg) { | |
92475f05 JL |
1929 | // Append cap_barrier field |
1930 | cap_barrier = msg->front.iov_base + msg->front.iov_len; | |
1931 | *cap_barrier = barrier; | |
1932 | msg->front.iov_len += sizeof(*cap_barrier); | |
1933 | ||
745a8e3b YZ |
1934 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); |
1935 | dout("send_cap_releases mds%d %p\n", session->s_mds, msg); | |
1936 | ceph_con_send(&session->s_con, msg); | |
e01a5946 | 1937 | } |
745a8e3b YZ |
1938 | return; |
1939 | out_err: | |
1940 | pr_err("send_cap_releases mds%d, failed to allocate message\n", | |
1941 | session->s_mds); | |
1942 | spin_lock(&session->s_cap_lock); | |
1943 | list_splice(&tmp_list, &session->s_cap_releases); | |
1944 | session->s_num_cap_releases += num_cap_releases; | |
1945 | spin_unlock(&session->s_cap_lock); | |
e01a5946 SW |
1946 | } |
1947 | ||
e3ec8d68 YZ |
1948 | static void ceph_cap_release_work(struct work_struct *work) |
1949 | { | |
1950 | struct ceph_mds_session *session = | |
1951 | container_of(work, struct ceph_mds_session, s_cap_release_work); | |
1952 | ||
1953 | mutex_lock(&session->s_mutex); | |
1954 | if (session->s_state == CEPH_MDS_SESSION_OPEN || | |
1955 | session->s_state == CEPH_MDS_SESSION_HUNG) | |
1956 | ceph_send_cap_releases(session->s_mdsc, session); | |
1957 | mutex_unlock(&session->s_mutex); | |
1958 | ceph_put_mds_session(session); | |
1959 | } | |
1960 | ||
1961 | void ceph_flush_cap_releases(struct ceph_mds_client *mdsc, | |
1962 | struct ceph_mds_session *session) | |
1963 | { | |
1964 | if (mdsc->stopping) | |
1965 | return; | |
1966 | ||
1967 | get_session(session); | |
1968 | if (queue_work(mdsc->fsc->cap_wq, | |
1969 | &session->s_cap_release_work)) { | |
1970 | dout("cap release work queued\n"); | |
1971 | } else { | |
1972 | ceph_put_mds_session(session); | |
1973 | dout("failed to queue cap release work\n"); | |
1974 | } | |
1975 | } | |
1976 | ||
1977 | /* | |
1978 | * caller holds session->s_cap_lock | |
1979 | */ | |
1980 | void __ceph_queue_cap_release(struct ceph_mds_session *session, | |
1981 | struct ceph_cap *cap) | |
1982 | { | |
1983 | list_add_tail(&cap->session_caps, &session->s_cap_releases); | |
1984 | session->s_num_cap_releases++; | |
1985 | ||
1986 | if (!(session->s_num_cap_releases % CEPH_CAPS_PER_RELEASE)) | |
1987 | ceph_flush_cap_releases(session->s_mdsc, session); | |
1988 | } | |
1989 | ||
37c4efc1 YZ |
1990 | static void ceph_cap_reclaim_work(struct work_struct *work) |
1991 | { | |
1992 | struct ceph_mds_client *mdsc = | |
1993 | container_of(work, struct ceph_mds_client, cap_reclaim_work); | |
1994 | int ret = ceph_trim_dentries(mdsc); | |
1995 | if (ret == -EAGAIN) | |
1996 | ceph_queue_cap_reclaim_work(mdsc); | |
1997 | } | |
1998 | ||
1999 | void ceph_queue_cap_reclaim_work(struct ceph_mds_client *mdsc) | |
2000 | { | |
2001 | if (mdsc->stopping) | |
2002 | return; | |
2003 | ||
2004 | if (queue_work(mdsc->fsc->cap_wq, &mdsc->cap_reclaim_work)) { | |
2005 | dout("caps reclaim work queued\n"); | |
2006 | } else { | |
2007 | dout("failed to queue caps release work\n"); | |
2008 | } | |
2009 | } | |
2010 | ||
fe33032d YZ |
2011 | void ceph_reclaim_caps_nr(struct ceph_mds_client *mdsc, int nr) |
2012 | { | |
2013 | int val; | |
2014 | if (!nr) | |
2015 | return; | |
2016 | val = atomic_add_return(nr, &mdsc->cap_reclaim_pending); | |
2017 | if (!(val % CEPH_CAPS_PER_RELEASE)) { | |
2018 | atomic_set(&mdsc->cap_reclaim_pending, 0); | |
2019 | ceph_queue_cap_reclaim_work(mdsc); | |
2020 | } | |
2021 | } | |
2022 | ||
2f2dc053 SW |
2023 | /* |
2024 | * requests | |
2025 | */ | |
2026 | ||
54008399 YZ |
2027 | int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req, |
2028 | struct inode *dir) | |
2029 | { | |
2030 | struct ceph_inode_info *ci = ceph_inode(dir); | |
2031 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
2032 | struct ceph_mount_options *opt = req->r_mdsc->fsc->mount_options; | |
2a5beea3 | 2033 | size_t size = sizeof(struct ceph_mds_reply_dir_entry); |
54008399 YZ |
2034 | int order, num_entries; |
2035 | ||
2036 | spin_lock(&ci->i_ceph_lock); | |
2037 | num_entries = ci->i_files + ci->i_subdirs; | |
2038 | spin_unlock(&ci->i_ceph_lock); | |
2039 | num_entries = max(num_entries, 1); | |
2040 | num_entries = min(num_entries, opt->max_readdir); | |
2041 | ||
2042 | order = get_order(size * num_entries); | |
2043 | while (order >= 0) { | |
2a5beea3 YZ |
2044 | rinfo->dir_entries = (void*)__get_free_pages(GFP_KERNEL | |
2045 | __GFP_NOWARN, | |
2046 | order); | |
2047 | if (rinfo->dir_entries) | |
54008399 YZ |
2048 | break; |
2049 | order--; | |
2050 | } | |
2a5beea3 | 2051 | if (!rinfo->dir_entries) |
54008399 YZ |
2052 | return -ENOMEM; |
2053 | ||
2054 | num_entries = (PAGE_SIZE << order) / size; | |
2055 | num_entries = min(num_entries, opt->max_readdir); | |
2056 | ||
2057 | rinfo->dir_buf_size = PAGE_SIZE << order; | |
2058 | req->r_num_caps = num_entries + 1; | |
2059 | req->r_args.readdir.max_entries = cpu_to_le32(num_entries); | |
2060 | req->r_args.readdir.max_bytes = cpu_to_le32(opt->max_readdir_bytes); | |
2061 | return 0; | |
2062 | } | |
2063 | ||
2f2dc053 SW |
2064 | /* |
2065 | * Create an mds request. | |
2066 | */ | |
2067 | struct ceph_mds_request * | |
2068 | ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode) | |
2069 | { | |
2070 | struct ceph_mds_request *req = kzalloc(sizeof(*req), GFP_NOFS); | |
63ecae7e | 2071 | struct timespec64 ts; |
2f2dc053 SW |
2072 | |
2073 | if (!req) | |
2074 | return ERR_PTR(-ENOMEM); | |
2075 | ||
b4556396 | 2076 | mutex_init(&req->r_fill_mutex); |
37151668 | 2077 | req->r_mdsc = mdsc; |
2f2dc053 SW |
2078 | req->r_started = jiffies; |
2079 | req->r_resend_mds = -1; | |
2080 | INIT_LIST_HEAD(&req->r_unsafe_dir_item); | |
68cd5b4b | 2081 | INIT_LIST_HEAD(&req->r_unsafe_target_item); |
2f2dc053 | 2082 | req->r_fmode = -1; |
153c8e6b | 2083 | kref_init(&req->r_kref); |
fcd00b68 | 2084 | RB_CLEAR_NODE(&req->r_node); |
2f2dc053 SW |
2085 | INIT_LIST_HEAD(&req->r_wait); |
2086 | init_completion(&req->r_completion); | |
2087 | init_completion(&req->r_safe_completion); | |
2088 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
2089 | ||
63ecae7e | 2090 | ktime_get_coarse_real_ts64(&ts); |
0ed1e90a | 2091 | req->r_stamp = timespec64_trunc(ts, mdsc->fsc->sb->s_time_gran); |
b8e69066 | 2092 | |
2f2dc053 SW |
2093 | req->r_op = op; |
2094 | req->r_direct_mode = mode; | |
2095 | return req; | |
2096 | } | |
2097 | ||
2098 | /* | |
44ca18f2 | 2099 | * return oldest (lowest) request, tid in request tree, 0 if none. |
2f2dc053 SW |
2100 | * |
2101 | * called under mdsc->mutex. | |
2102 | */ | |
44ca18f2 SW |
2103 | static struct ceph_mds_request *__get_oldest_req(struct ceph_mds_client *mdsc) |
2104 | { | |
2105 | if (RB_EMPTY_ROOT(&mdsc->request_tree)) | |
2106 | return NULL; | |
2107 | return rb_entry(rb_first(&mdsc->request_tree), | |
2108 | struct ceph_mds_request, r_node); | |
2109 | } | |
2110 | ||
e8a7b8b1 | 2111 | static inline u64 __get_oldest_tid(struct ceph_mds_client *mdsc) |
2f2dc053 | 2112 | { |
e8a7b8b1 | 2113 | return mdsc->oldest_tid; |
2f2dc053 SW |
2114 | } |
2115 | ||
2116 | /* | |
2117 | * Build a dentry's path. Allocate on heap; caller must kfree. Based | |
2118 | * on build_path_from_dentry in fs/cifs/dir.c. | |
2119 | * | |
2120 | * If @stop_on_nosnap, generate path relative to the first non-snapped | |
2121 | * inode. | |
2122 | * | |
2123 | * Encode hidden .snap dirs as a double /, i.e. | |
2124 | * foo/.snap/bar -> foo//bar | |
2125 | */ | |
69a10fb3 | 2126 | char *ceph_mdsc_build_path(struct dentry *dentry, int *plen, u64 *pbase, |
2f2dc053 SW |
2127 | int stop_on_nosnap) |
2128 | { | |
2129 | struct dentry *temp; | |
2130 | char *path; | |
f77f21bb | 2131 | int pos; |
1b71fe2e | 2132 | unsigned seq; |
69a10fb3 | 2133 | u64 base; |
2f2dc053 | 2134 | |
d37b1d99 | 2135 | if (!dentry) |
2f2dc053 SW |
2136 | return ERR_PTR(-EINVAL); |
2137 | ||
f77f21bb | 2138 | path = __getname(); |
d37b1d99 | 2139 | if (!path) |
2f2dc053 | 2140 | return ERR_PTR(-ENOMEM); |
f77f21bb JL |
2141 | retry: |
2142 | pos = PATH_MAX - 1; | |
2143 | path[pos] = '\0'; | |
2144 | ||
2145 | seq = read_seqbegin(&rename_lock); | |
1b71fe2e | 2146 | rcu_read_lock(); |
f77f21bb JL |
2147 | temp = dentry; |
2148 | for (;;) { | |
1b71fe2e | 2149 | struct inode *inode; |
2f2dc053 | 2150 | |
1b71fe2e | 2151 | spin_lock(&temp->d_lock); |
2b0143b5 | 2152 | inode = d_inode(temp); |
2f2dc053 | 2153 | if (inode && ceph_snap(inode) == CEPH_SNAPDIR) { |
104648ad | 2154 | dout("build_path path+%d: %p SNAPDIR\n", |
2f2dc053 | 2155 | pos, temp); |
d6b8bd67 | 2156 | } else if (stop_on_nosnap && inode && dentry != temp && |
2f2dc053 | 2157 | ceph_snap(inode) == CEPH_NOSNAP) { |
9d5a09e6 | 2158 | spin_unlock(&temp->d_lock); |
d6b8bd67 | 2159 | pos++; /* get rid of any prepended '/' */ |
2f2dc053 SW |
2160 | break; |
2161 | } else { | |
2162 | pos -= temp->d_name.len; | |
1b71fe2e AV |
2163 | if (pos < 0) { |
2164 | spin_unlock(&temp->d_lock); | |
2f2dc053 | 2165 | break; |
1b71fe2e | 2166 | } |
f77f21bb | 2167 | memcpy(path + pos, temp->d_name.name, temp->d_name.len); |
2f2dc053 | 2168 | } |
1b71fe2e | 2169 | spin_unlock(&temp->d_lock); |
41883ba8 | 2170 | temp = READ_ONCE(temp->d_parent); |
f77f21bb JL |
2171 | |
2172 | /* Are we at the root? */ | |
2173 | if (IS_ROOT(temp)) | |
2174 | break; | |
2175 | ||
2176 | /* Are we out of buffer? */ | |
2177 | if (--pos < 0) | |
2178 | break; | |
2179 | ||
2180 | path[pos] = '/'; | |
2f2dc053 | 2181 | } |
69a10fb3 | 2182 | base = ceph_ino(d_inode(temp)); |
1b71fe2e | 2183 | rcu_read_unlock(); |
f77f21bb | 2184 | if (pos < 0 || read_seqretry(&rename_lock, seq)) { |
104648ad | 2185 | pr_err("build_path did not end path lookup where " |
f77f21bb | 2186 | "expected, pos is %d\n", pos); |
2f2dc053 SW |
2187 | /* presumably this is only possible if racing with a |
2188 | rename of one of the parent directories (we can not | |
2189 | lock the dentries above us to prevent this, but | |
2190 | retrying should be harmless) */ | |
2f2dc053 SW |
2191 | goto retry; |
2192 | } | |
2193 | ||
69a10fb3 | 2194 | *pbase = base; |
f77f21bb | 2195 | *plen = PATH_MAX - 1 - pos; |
104648ad | 2196 | dout("build_path on %p %d built %llx '%.*s'\n", |
f77f21bb JL |
2197 | dentry, d_count(dentry), base, *plen, path + pos); |
2198 | return path + pos; | |
2f2dc053 SW |
2199 | } |
2200 | ||
fd36a717 | 2201 | static int build_dentry_path(struct dentry *dentry, struct inode *dir, |
2f2dc053 | 2202 | const char **ppath, int *ppathlen, u64 *pino, |
1bcb3440 | 2203 | bool *pfreepath, bool parent_locked) |
2f2dc053 SW |
2204 | { |
2205 | char *path; | |
2206 | ||
c6b0b656 | 2207 | rcu_read_lock(); |
fd36a717 JL |
2208 | if (!dir) |
2209 | dir = d_inode_rcu(dentry->d_parent); | |
964fff74 | 2210 | if (dir && parent_locked && ceph_snap(dir) == CEPH_NOSNAP) { |
c6b0b656 JL |
2211 | *pino = ceph_ino(dir); |
2212 | rcu_read_unlock(); | |
964fff74 JL |
2213 | *ppath = dentry->d_name.name; |
2214 | *ppathlen = dentry->d_name.len; | |
2f2dc053 SW |
2215 | return 0; |
2216 | } | |
c6b0b656 | 2217 | rcu_read_unlock(); |
2f2dc053 SW |
2218 | path = ceph_mdsc_build_path(dentry, ppathlen, pino, 1); |
2219 | if (IS_ERR(path)) | |
2220 | return PTR_ERR(path); | |
2221 | *ppath = path; | |
1bcb3440 | 2222 | *pfreepath = true; |
2f2dc053 SW |
2223 | return 0; |
2224 | } | |
2225 | ||
2226 | static int build_inode_path(struct inode *inode, | |
2227 | const char **ppath, int *ppathlen, u64 *pino, | |
1bcb3440 | 2228 | bool *pfreepath) |
2f2dc053 SW |
2229 | { |
2230 | struct dentry *dentry; | |
2231 | char *path; | |
2232 | ||
2233 | if (ceph_snap(inode) == CEPH_NOSNAP) { | |
2234 | *pino = ceph_ino(inode); | |
2235 | *ppathlen = 0; | |
2236 | return 0; | |
2237 | } | |
2238 | dentry = d_find_alias(inode); | |
2239 | path = ceph_mdsc_build_path(dentry, ppathlen, pino, 1); | |
2240 | dput(dentry); | |
2241 | if (IS_ERR(path)) | |
2242 | return PTR_ERR(path); | |
2243 | *ppath = path; | |
1bcb3440 | 2244 | *pfreepath = true; |
2f2dc053 SW |
2245 | return 0; |
2246 | } | |
2247 | ||
2248 | /* | |
2249 | * request arguments may be specified via an inode *, a dentry *, or | |
2250 | * an explicit ino+path. | |
2251 | */ | |
2252 | static int set_request_path_attr(struct inode *rinode, struct dentry *rdentry, | |
fd36a717 JL |
2253 | struct inode *rdiri, const char *rpath, |
2254 | u64 rino, const char **ppath, int *pathlen, | |
1bcb3440 | 2255 | u64 *ino, bool *freepath, bool parent_locked) |
2f2dc053 SW |
2256 | { |
2257 | int r = 0; | |
2258 | ||
2259 | if (rinode) { | |
2260 | r = build_inode_path(rinode, ppath, pathlen, ino, freepath); | |
2261 | dout(" inode %p %llx.%llx\n", rinode, ceph_ino(rinode), | |
2262 | ceph_snap(rinode)); | |
2263 | } else if (rdentry) { | |
fd36a717 | 2264 | r = build_dentry_path(rdentry, rdiri, ppath, pathlen, ino, |
1bcb3440 | 2265 | freepath, parent_locked); |
2f2dc053 SW |
2266 | dout(" dentry %p %llx/%.*s\n", rdentry, *ino, *pathlen, |
2267 | *ppath); | |
795858db | 2268 | } else if (rpath || rino) { |
2f2dc053 SW |
2269 | *ino = rino; |
2270 | *ppath = rpath; | |
b000056a | 2271 | *pathlen = rpath ? strlen(rpath) : 0; |
2f2dc053 SW |
2272 | dout(" path %.*s\n", *pathlen, rpath); |
2273 | } | |
2274 | ||
2275 | return r; | |
2276 | } | |
2277 | ||
2278 | /* | |
2279 | * called under mdsc->mutex | |
2280 | */ | |
2281 | static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc, | |
2282 | struct ceph_mds_request *req, | |
6e6f0923 | 2283 | int mds, bool drop_cap_releases) |
2f2dc053 SW |
2284 | { |
2285 | struct ceph_msg *msg; | |
2286 | struct ceph_mds_request_head *head; | |
2287 | const char *path1 = NULL; | |
2288 | const char *path2 = NULL; | |
2289 | u64 ino1 = 0, ino2 = 0; | |
2290 | int pathlen1 = 0, pathlen2 = 0; | |
1bcb3440 | 2291 | bool freepath1 = false, freepath2 = false; |
2f2dc053 SW |
2292 | int len; |
2293 | u16 releases; | |
2294 | void *p, *end; | |
2295 | int ret; | |
2296 | ||
2297 | ret = set_request_path_attr(req->r_inode, req->r_dentry, | |
3dd69aab | 2298 | req->r_parent, req->r_path1, req->r_ino1.ino, |
1bcb3440 JL |
2299 | &path1, &pathlen1, &ino1, &freepath1, |
2300 | test_bit(CEPH_MDS_R_PARENT_LOCKED, | |
2301 | &req->r_req_flags)); | |
2f2dc053 SW |
2302 | if (ret < 0) { |
2303 | msg = ERR_PTR(ret); | |
2304 | goto out; | |
2305 | } | |
2306 | ||
1bcb3440 | 2307 | /* If r_old_dentry is set, then assume that its parent is locked */ |
2f2dc053 | 2308 | ret = set_request_path_attr(NULL, req->r_old_dentry, |
fd36a717 | 2309 | req->r_old_dentry_dir, |
2f2dc053 | 2310 | req->r_path2, req->r_ino2.ino, |
1bcb3440 | 2311 | &path2, &pathlen2, &ino2, &freepath2, true); |
2f2dc053 SW |
2312 | if (ret < 0) { |
2313 | msg = ERR_PTR(ret); | |
2314 | goto out_free1; | |
2315 | } | |
2316 | ||
2317 | len = sizeof(*head) + | |
b8e69066 | 2318 | pathlen1 + pathlen2 + 2*(1 + sizeof(u32) + sizeof(u64)) + |
777d738a | 2319 | sizeof(struct ceph_timespec); |
2f2dc053 SW |
2320 | |
2321 | /* calculate (max) length for cap releases */ | |
2322 | len += sizeof(struct ceph_mds_request_release) * | |
2323 | (!!req->r_inode_drop + !!req->r_dentry_drop + | |
2324 | !!req->r_old_inode_drop + !!req->r_old_dentry_drop); | |
2325 | if (req->r_dentry_drop) | |
c1dfc277 | 2326 | len += pathlen1; |
2f2dc053 | 2327 | if (req->r_old_dentry_drop) |
c1dfc277 | 2328 | len += pathlen2; |
2f2dc053 | 2329 | |
0d9c1ab3 | 2330 | msg = ceph_msg_new2(CEPH_MSG_CLIENT_REQUEST, len, 1, GFP_NOFS, false); |
a79832f2 SW |
2331 | if (!msg) { |
2332 | msg = ERR_PTR(-ENOMEM); | |
2f2dc053 | 2333 | goto out_free2; |
a79832f2 | 2334 | } |
2f2dc053 | 2335 | |
7cfa0313 | 2336 | msg->hdr.version = cpu_to_le16(2); |
6df058c0 SW |
2337 | msg->hdr.tid = cpu_to_le64(req->r_tid); |
2338 | ||
2f2dc053 SW |
2339 | head = msg->front.iov_base; |
2340 | p = msg->front.iov_base + sizeof(*head); | |
2341 | end = msg->front.iov_base + msg->front.iov_len; | |
2342 | ||
2343 | head->mdsmap_epoch = cpu_to_le32(mdsc->mdsmap->m_epoch); | |
2344 | head->op = cpu_to_le32(req->r_op); | |
ff3d0046 EB |
2345 | head->caller_uid = cpu_to_le32(from_kuid(&init_user_ns, req->r_uid)); |
2346 | head->caller_gid = cpu_to_le32(from_kgid(&init_user_ns, req->r_gid)); | |
2f2dc053 SW |
2347 | head->args = req->r_args; |
2348 | ||
2349 | ceph_encode_filepath(&p, end, ino1, path1); | |
2350 | ceph_encode_filepath(&p, end, ino2, path2); | |
2351 | ||
e979cf50 SW |
2352 | /* make note of release offset, in case we need to replay */ |
2353 | req->r_request_release_offset = p - msg->front.iov_base; | |
2354 | ||
2f2dc053 SW |
2355 | /* cap releases */ |
2356 | releases = 0; | |
2357 | if (req->r_inode_drop) | |
2358 | releases += ceph_encode_inode_release(&p, | |
2b0143b5 | 2359 | req->r_inode ? req->r_inode : d_inode(req->r_dentry), |
2f2dc053 SW |
2360 | mds, req->r_inode_drop, req->r_inode_unless, 0); |
2361 | if (req->r_dentry_drop) | |
2362 | releases += ceph_encode_dentry_release(&p, req->r_dentry, | |
3dd69aab | 2363 | req->r_parent, mds, req->r_dentry_drop, |
ca6c8ae0 | 2364 | req->r_dentry_unless); |
2f2dc053 SW |
2365 | if (req->r_old_dentry_drop) |
2366 | releases += ceph_encode_dentry_release(&p, req->r_old_dentry, | |
ca6c8ae0 JL |
2367 | req->r_old_dentry_dir, mds, |
2368 | req->r_old_dentry_drop, | |
2369 | req->r_old_dentry_unless); | |
2f2dc053 SW |
2370 | if (req->r_old_inode_drop) |
2371 | releases += ceph_encode_inode_release(&p, | |
2b0143b5 | 2372 | d_inode(req->r_old_dentry), |
2f2dc053 | 2373 | mds, req->r_old_inode_drop, req->r_old_inode_unless, 0); |
6e6f0923 YZ |
2374 | |
2375 | if (drop_cap_releases) { | |
2376 | releases = 0; | |
2377 | p = msg->front.iov_base + req->r_request_release_offset; | |
2378 | } | |
2379 | ||
2f2dc053 SW |
2380 | head->num_releases = cpu_to_le16(releases); |
2381 | ||
b8e69066 | 2382 | /* time stamp */ |
1f041a89 YZ |
2383 | { |
2384 | struct ceph_timespec ts; | |
0ed1e90a | 2385 | ceph_encode_timespec64(&ts, &req->r_stamp); |
1f041a89 YZ |
2386 | ceph_encode_copy(&p, &ts, sizeof(ts)); |
2387 | } | |
b8e69066 | 2388 | |
2f2dc053 SW |
2389 | BUG_ON(p > end); |
2390 | msg->front.iov_len = p - msg->front.iov_base; | |
2391 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
2392 | ||
25e6bae3 YZ |
2393 | if (req->r_pagelist) { |
2394 | struct ceph_pagelist *pagelist = req->r_pagelist; | |
25e6bae3 YZ |
2395 | ceph_msg_data_add_pagelist(msg, pagelist); |
2396 | msg->hdr.data_len = cpu_to_le32(pagelist->length); | |
2397 | } else { | |
2398 | msg->hdr.data_len = 0; | |
ebf18f47 | 2399 | } |
02afca6c | 2400 | |
2f2dc053 SW |
2401 | msg->hdr.data_off = cpu_to_le16(0); |
2402 | ||
2403 | out_free2: | |
2404 | if (freepath2) | |
f77f21bb | 2405 | ceph_mdsc_free_path((char *)path2, pathlen2); |
2f2dc053 SW |
2406 | out_free1: |
2407 | if (freepath1) | |
f77f21bb | 2408 | ceph_mdsc_free_path((char *)path1, pathlen1); |
2f2dc053 SW |
2409 | out: |
2410 | return msg; | |
2411 | } | |
2412 | ||
2413 | /* | |
2414 | * called under mdsc->mutex if error, under no mutex if | |
2415 | * success. | |
2416 | */ | |
2417 | static void complete_request(struct ceph_mds_client *mdsc, | |
2418 | struct ceph_mds_request *req) | |
2419 | { | |
2420 | if (req->r_callback) | |
2421 | req->r_callback(mdsc, req); | |
111c7081 | 2422 | complete_all(&req->r_completion); |
2f2dc053 SW |
2423 | } |
2424 | ||
2425 | /* | |
2426 | * called under mdsc->mutex | |
2427 | */ | |
2428 | static int __prepare_send_request(struct ceph_mds_client *mdsc, | |
2429 | struct ceph_mds_request *req, | |
6e6f0923 | 2430 | int mds, bool drop_cap_releases) |
2f2dc053 SW |
2431 | { |
2432 | struct ceph_mds_request_head *rhead; | |
2433 | struct ceph_msg *msg; | |
2434 | int flags = 0; | |
2435 | ||
2f2dc053 | 2436 | req->r_attempts++; |
e55b71f8 GF |
2437 | if (req->r_inode) { |
2438 | struct ceph_cap *cap = | |
2439 | ceph_get_cap_for_mds(ceph_inode(req->r_inode), mds); | |
2440 | ||
2441 | if (cap) | |
2442 | req->r_sent_on_mseq = cap->mseq; | |
2443 | else | |
2444 | req->r_sent_on_mseq = -1; | |
2445 | } | |
2f2dc053 SW |
2446 | dout("prepare_send_request %p tid %lld %s (attempt %d)\n", req, |
2447 | req->r_tid, ceph_mds_op_name(req->r_op), req->r_attempts); | |
2448 | ||
bc2de10d | 2449 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { |
c5c9a0bf | 2450 | void *p; |
01a92f17 SW |
2451 | /* |
2452 | * Replay. Do not regenerate message (and rebuild | |
2453 | * paths, etc.); just use the original message. | |
2454 | * Rebuilding paths will break for renames because | |
2455 | * d_move mangles the src name. | |
2456 | */ | |
2457 | msg = req->r_request; | |
2458 | rhead = msg->front.iov_base; | |
2459 | ||
2460 | flags = le32_to_cpu(rhead->flags); | |
2461 | flags |= CEPH_MDS_FLAG_REPLAY; | |
2462 | rhead->flags = cpu_to_le32(flags); | |
2463 | ||
2464 | if (req->r_target_inode) | |
2465 | rhead->ino = cpu_to_le64(ceph_ino(req->r_target_inode)); | |
2466 | ||
2467 | rhead->num_retry = req->r_attempts - 1; | |
e979cf50 SW |
2468 | |
2469 | /* remove cap/dentry releases from message */ | |
2470 | rhead->num_releases = 0; | |
c5c9a0bf YZ |
2471 | |
2472 | /* time stamp */ | |
2473 | p = msg->front.iov_base + req->r_request_release_offset; | |
1f041a89 YZ |
2474 | { |
2475 | struct ceph_timespec ts; | |
0ed1e90a | 2476 | ceph_encode_timespec64(&ts, &req->r_stamp); |
1f041a89 YZ |
2477 | ceph_encode_copy(&p, &ts, sizeof(ts)); |
2478 | } | |
c5c9a0bf YZ |
2479 | |
2480 | msg->front.iov_len = p - msg->front.iov_base; | |
2481 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
01a92f17 SW |
2482 | return 0; |
2483 | } | |
2484 | ||
2f2dc053 SW |
2485 | if (req->r_request) { |
2486 | ceph_msg_put(req->r_request); | |
2487 | req->r_request = NULL; | |
2488 | } | |
6e6f0923 | 2489 | msg = create_request_message(mdsc, req, mds, drop_cap_releases); |
2f2dc053 | 2490 | if (IS_ERR(msg)) { |
e1518c7c | 2491 | req->r_err = PTR_ERR(msg); |
a79832f2 | 2492 | return PTR_ERR(msg); |
2f2dc053 SW |
2493 | } |
2494 | req->r_request = msg; | |
2495 | ||
2496 | rhead = msg->front.iov_base; | |
2f2dc053 | 2497 | rhead->oldest_client_tid = cpu_to_le64(__get_oldest_tid(mdsc)); |
bc2de10d | 2498 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) |
2f2dc053 | 2499 | flags |= CEPH_MDS_FLAG_REPLAY; |
3dd69aab | 2500 | if (req->r_parent) |
2f2dc053 SW |
2501 | flags |= CEPH_MDS_FLAG_WANT_DENTRY; |
2502 | rhead->flags = cpu_to_le32(flags); | |
2503 | rhead->num_fwd = req->r_num_fwd; | |
2504 | rhead->num_retry = req->r_attempts - 1; | |
01a92f17 | 2505 | rhead->ino = 0; |
2f2dc053 | 2506 | |
3dd69aab | 2507 | dout(" r_parent = %p\n", req->r_parent); |
2f2dc053 SW |
2508 | return 0; |
2509 | } | |
2510 | ||
2511 | /* | |
2512 | * send request, or put it on the appropriate wait list. | |
2513 | */ | |
d5548492 | 2514 | static void __do_request(struct ceph_mds_client *mdsc, |
2f2dc053 SW |
2515 | struct ceph_mds_request *req) |
2516 | { | |
2517 | struct ceph_mds_session *session = NULL; | |
2518 | int mds = -1; | |
48fec5d0 | 2519 | int err = 0; |
2f2dc053 | 2520 | |
bc2de10d JL |
2521 | if (req->r_err || test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)) { |
2522 | if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) | |
eb1b8af3 | 2523 | __unregister_request(mdsc, req); |
d5548492 | 2524 | return; |
eb1b8af3 | 2525 | } |
2f2dc053 SW |
2526 | |
2527 | if (req->r_timeout && | |
2528 | time_after_eq(jiffies, req->r_started + req->r_timeout)) { | |
2529 | dout("do_request timed out\n"); | |
2530 | err = -EIO; | |
2531 | goto finish; | |
2532 | } | |
52953d55 | 2533 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) { |
48fec5d0 YZ |
2534 | dout("do_request forced umount\n"); |
2535 | err = -EIO; | |
2536 | goto finish; | |
2537 | } | |
52953d55 | 2538 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_MOUNTING) { |
e9e427f0 YZ |
2539 | if (mdsc->mdsmap_err) { |
2540 | err = mdsc->mdsmap_err; | |
2541 | dout("do_request mdsmap err %d\n", err); | |
2542 | goto finish; | |
2543 | } | |
cc8e8342 YZ |
2544 | if (mdsc->mdsmap->m_epoch == 0) { |
2545 | dout("do_request no mdsmap, waiting for map\n"); | |
2546 | list_add(&req->r_wait, &mdsc->waiting_for_map); | |
d5548492 | 2547 | return; |
cc8e8342 | 2548 | } |
e9e427f0 YZ |
2549 | if (!(mdsc->fsc->mount_options->flags & |
2550 | CEPH_MOUNT_OPT_MOUNTWAIT) && | |
2551 | !ceph_mdsmap_is_cluster_available(mdsc->mdsmap)) { | |
2552 | err = -ENOENT; | |
2553 | pr_info("probably no mds server is up\n"); | |
2554 | goto finish; | |
2555 | } | |
2556 | } | |
2f2dc053 | 2557 | |
dc69e2e9 SW |
2558 | put_request_session(req); |
2559 | ||
2f2dc053 SW |
2560 | mds = __choose_mds(mdsc, req); |
2561 | if (mds < 0 || | |
2562 | ceph_mdsmap_get_state(mdsc->mdsmap, mds) < CEPH_MDS_STATE_ACTIVE) { | |
2563 | dout("do_request no mds or not active, waiting for map\n"); | |
2564 | list_add(&req->r_wait, &mdsc->waiting_for_map); | |
d5548492 | 2565 | return; |
2f2dc053 SW |
2566 | } |
2567 | ||
2568 | /* get, open session */ | |
2569 | session = __ceph_lookup_mds_session(mdsc, mds); | |
9c423956 | 2570 | if (!session) { |
2f2dc053 | 2571 | session = register_session(mdsc, mds); |
9c423956 SW |
2572 | if (IS_ERR(session)) { |
2573 | err = PTR_ERR(session); | |
2574 | goto finish; | |
2575 | } | |
2576 | } | |
dc69e2e9 SW |
2577 | req->r_session = get_session(session); |
2578 | ||
2f2dc053 | 2579 | dout("do_request mds%d session %p state %s\n", mds, session, |
a687ecaf | 2580 | ceph_session_state_name(session->s_state)); |
2f2dc053 SW |
2581 | if (session->s_state != CEPH_MDS_SESSION_OPEN && |
2582 | session->s_state != CEPH_MDS_SESSION_HUNG) { | |
fcff415c YZ |
2583 | if (session->s_state == CEPH_MDS_SESSION_REJECTED) { |
2584 | err = -EACCES; | |
2585 | goto out_session; | |
2586 | } | |
2f2dc053 SW |
2587 | if (session->s_state == CEPH_MDS_SESSION_NEW || |
2588 | session->s_state == CEPH_MDS_SESSION_CLOSING) | |
2589 | __open_session(mdsc, session); | |
2590 | list_add(&req->r_wait, &session->s_waiting); | |
2591 | goto out_session; | |
2592 | } | |
2593 | ||
2594 | /* send request */ | |
2f2dc053 SW |
2595 | req->r_resend_mds = -1; /* forget any previous mds hint */ |
2596 | ||
2597 | if (req->r_request_started == 0) /* note request start time */ | |
2598 | req->r_request_started = jiffies; | |
2599 | ||
6e6f0923 | 2600 | err = __prepare_send_request(mdsc, req, mds, false); |
2f2dc053 SW |
2601 | if (!err) { |
2602 | ceph_msg_get(req->r_request); | |
2603 | ceph_con_send(&session->s_con, req->r_request); | |
2604 | } | |
2605 | ||
2606 | out_session: | |
2607 | ceph_put_mds_session(session); | |
48fec5d0 YZ |
2608 | finish: |
2609 | if (err) { | |
2610 | dout("__do_request early error %d\n", err); | |
2611 | req->r_err = err; | |
2612 | complete_request(mdsc, req); | |
2613 | __unregister_request(mdsc, req); | |
2614 | } | |
d5548492 | 2615 | return; |
2f2dc053 SW |
2616 | } |
2617 | ||
2618 | /* | |
2619 | * called under mdsc->mutex | |
2620 | */ | |
2621 | static void __wake_requests(struct ceph_mds_client *mdsc, | |
2622 | struct list_head *head) | |
2623 | { | |
ed75ec2c YZ |
2624 | struct ceph_mds_request *req; |
2625 | LIST_HEAD(tmp_list); | |
2626 | ||
2627 | list_splice_init(head, &tmp_list); | |
2f2dc053 | 2628 | |
ed75ec2c YZ |
2629 | while (!list_empty(&tmp_list)) { |
2630 | req = list_entry(tmp_list.next, | |
2631 | struct ceph_mds_request, r_wait); | |
2f2dc053 | 2632 | list_del_init(&req->r_wait); |
7971bd92 | 2633 | dout(" wake request %p tid %llu\n", req, req->r_tid); |
2f2dc053 SW |
2634 | __do_request(mdsc, req); |
2635 | } | |
2636 | } | |
2637 | ||
2638 | /* | |
2639 | * Wake up threads with requests pending for @mds, so that they can | |
29790f26 | 2640 | * resubmit their requests to a possibly different mds. |
2f2dc053 | 2641 | */ |
29790f26 | 2642 | static void kick_requests(struct ceph_mds_client *mdsc, int mds) |
2f2dc053 | 2643 | { |
44ca18f2 | 2644 | struct ceph_mds_request *req; |
282c1052 | 2645 | struct rb_node *p = rb_first(&mdsc->request_tree); |
2f2dc053 SW |
2646 | |
2647 | dout("kick_requests mds%d\n", mds); | |
282c1052 | 2648 | while (p) { |
44ca18f2 | 2649 | req = rb_entry(p, struct ceph_mds_request, r_node); |
282c1052 | 2650 | p = rb_next(p); |
bc2de10d | 2651 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) |
44ca18f2 | 2652 | continue; |
3de22be6 YZ |
2653 | if (req->r_attempts > 0) |
2654 | continue; /* only new requests */ | |
44ca18f2 SW |
2655 | if (req->r_session && |
2656 | req->r_session->s_mds == mds) { | |
2657 | dout(" kicking tid %llu\n", req->r_tid); | |
03974e81 | 2658 | list_del_init(&req->r_wait); |
44ca18f2 | 2659 | __do_request(mdsc, req); |
2f2dc053 SW |
2660 | } |
2661 | } | |
2662 | } | |
2663 | ||
86bda539 | 2664 | int ceph_mdsc_submit_request(struct ceph_mds_client *mdsc, struct inode *dir, |
2f2dc053 SW |
2665 | struct ceph_mds_request *req) |
2666 | { | |
86bda539 JL |
2667 | int err; |
2668 | ||
2669 | /* take CAP_PIN refs for r_inode, r_parent, r_old_dentry */ | |
2670 | if (req->r_inode) | |
2671 | ceph_get_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN); | |
2672 | if (req->r_parent) | |
2673 | ceph_get_cap_refs(ceph_inode(req->r_parent), CEPH_CAP_PIN); | |
2674 | if (req->r_old_dentry_dir) | |
2675 | ceph_get_cap_refs(ceph_inode(req->r_old_dentry_dir), | |
2676 | CEPH_CAP_PIN); | |
2677 | ||
2678 | dout("submit_request on %p for inode %p\n", req, dir); | |
2f2dc053 | 2679 | mutex_lock(&mdsc->mutex); |
86bda539 | 2680 | __register_request(mdsc, req, dir); |
2f2dc053 | 2681 | __do_request(mdsc, req); |
86bda539 | 2682 | err = req->r_err; |
2f2dc053 | 2683 | mutex_unlock(&mdsc->mutex); |
86bda539 | 2684 | return err; |
2f2dc053 SW |
2685 | } |
2686 | ||
8340f22c JL |
2687 | static int ceph_mdsc_wait_request(struct ceph_mds_client *mdsc, |
2688 | struct ceph_mds_request *req) | |
2f2dc053 SW |
2689 | { |
2690 | int err; | |
2691 | ||
e1518c7c | 2692 | /* wait */ |
e1518c7c | 2693 | dout("do_request waiting\n"); |
5be73034 | 2694 | if (!req->r_timeout && req->r_wait_for_completion) { |
9280be24 | 2695 | err = req->r_wait_for_completion(mdsc, req); |
e1518c7c | 2696 | } else { |
5be73034 ID |
2697 | long timeleft = wait_for_completion_killable_timeout( |
2698 | &req->r_completion, | |
2699 | ceph_timeout_jiffies(req->r_timeout)); | |
2700 | if (timeleft > 0) | |
2701 | err = 0; | |
2702 | else if (!timeleft) | |
2703 | err = -EIO; /* timed out */ | |
2704 | else | |
2705 | err = timeleft; /* killed */ | |
e1518c7c SW |
2706 | } |
2707 | dout("do_request waited, got %d\n", err); | |
2708 | mutex_lock(&mdsc->mutex); | |
5b1daecd | 2709 | |
e1518c7c | 2710 | /* only abort if we didn't race with a real reply */ |
bc2de10d | 2711 | if (test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)) { |
e1518c7c SW |
2712 | err = le32_to_cpu(req->r_reply_info.head->result); |
2713 | } else if (err < 0) { | |
2714 | dout("aborted request %lld with %d\n", req->r_tid, err); | |
b4556396 SW |
2715 | |
2716 | /* | |
2717 | * ensure we aren't running concurrently with | |
2718 | * ceph_fill_trace or ceph_readdir_prepopulate, which | |
2719 | * rely on locks (dir mutex) held by our caller. | |
2720 | */ | |
2721 | mutex_lock(&req->r_fill_mutex); | |
e1518c7c | 2722 | req->r_err = err; |
bc2de10d | 2723 | set_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags); |
b4556396 | 2724 | mutex_unlock(&req->r_fill_mutex); |
5b1daecd | 2725 | |
3dd69aab | 2726 | if (req->r_parent && |
167c9e35 SW |
2727 | (req->r_op & CEPH_MDS_OP_WRITE)) |
2728 | ceph_invalidate_dir_request(req); | |
2f2dc053 | 2729 | } else { |
e1518c7c | 2730 | err = req->r_err; |
2f2dc053 | 2731 | } |
2f2dc053 | 2732 | |
e1518c7c | 2733 | mutex_unlock(&mdsc->mutex); |
8340f22c JL |
2734 | return err; |
2735 | } | |
2736 | ||
2737 | /* | |
2738 | * Synchrously perform an mds request. Take care of all of the | |
2739 | * session setup, forwarding, retry details. | |
2740 | */ | |
2741 | int ceph_mdsc_do_request(struct ceph_mds_client *mdsc, | |
2742 | struct inode *dir, | |
2743 | struct ceph_mds_request *req) | |
2744 | { | |
2745 | int err; | |
2746 | ||
2747 | dout("do_request on %p\n", req); | |
2748 | ||
2749 | /* issue */ | |
2750 | err = ceph_mdsc_submit_request(mdsc, dir, req); | |
2751 | if (!err) | |
2752 | err = ceph_mdsc_wait_request(mdsc, req); | |
2f2dc053 SW |
2753 | dout("do_request %p done, result %d\n", req, err); |
2754 | return err; | |
2755 | } | |
2756 | ||
167c9e35 | 2757 | /* |
2f276c51 | 2758 | * Invalidate dir's completeness, dentry lease state on an aborted MDS |
167c9e35 SW |
2759 | * namespace request. |
2760 | */ | |
2761 | void ceph_invalidate_dir_request(struct ceph_mds_request *req) | |
2762 | { | |
8d8f371c YZ |
2763 | struct inode *dir = req->r_parent; |
2764 | struct inode *old_dir = req->r_old_dentry_dir; | |
167c9e35 | 2765 | |
8d8f371c | 2766 | dout("invalidate_dir_request %p %p (complete, lease(s))\n", dir, old_dir); |
167c9e35 | 2767 | |
8d8f371c YZ |
2768 | ceph_dir_clear_complete(dir); |
2769 | if (old_dir) | |
2770 | ceph_dir_clear_complete(old_dir); | |
167c9e35 SW |
2771 | if (req->r_dentry) |
2772 | ceph_invalidate_dentry_lease(req->r_dentry); | |
2773 | if (req->r_old_dentry) | |
2774 | ceph_invalidate_dentry_lease(req->r_old_dentry); | |
2775 | } | |
2776 | ||
2f2dc053 SW |
2777 | /* |
2778 | * Handle mds reply. | |
2779 | * | |
2780 | * We take the session mutex and parse and process the reply immediately. | |
2781 | * This preserves the logical ordering of replies, capabilities, etc., sent | |
2782 | * by the MDS as they are applied to our local cache. | |
2783 | */ | |
2784 | static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg) | |
2785 | { | |
2786 | struct ceph_mds_client *mdsc = session->s_mdsc; | |
2787 | struct ceph_mds_request *req; | |
2788 | struct ceph_mds_reply_head *head = msg->front.iov_base; | |
2789 | struct ceph_mds_reply_info_parsed *rinfo; /* parsed reply info */ | |
982d6011 | 2790 | struct ceph_snap_realm *realm; |
2f2dc053 SW |
2791 | u64 tid; |
2792 | int err, result; | |
2600d2dd | 2793 | int mds = session->s_mds; |
2f2dc053 | 2794 | |
2f2dc053 SW |
2795 | if (msg->front.iov_len < sizeof(*head)) { |
2796 | pr_err("mdsc_handle_reply got corrupt (short) reply\n"); | |
9ec7cab1 | 2797 | ceph_msg_dump(msg); |
2f2dc053 SW |
2798 | return; |
2799 | } | |
2800 | ||
2801 | /* get request, session */ | |
6df058c0 | 2802 | tid = le64_to_cpu(msg->hdr.tid); |
2f2dc053 | 2803 | mutex_lock(&mdsc->mutex); |
fcd00b68 | 2804 | req = lookup_get_request(mdsc, tid); |
2f2dc053 SW |
2805 | if (!req) { |
2806 | dout("handle_reply on unknown tid %llu\n", tid); | |
2807 | mutex_unlock(&mdsc->mutex); | |
2808 | return; | |
2809 | } | |
2810 | dout("handle_reply %p\n", req); | |
2f2dc053 SW |
2811 | |
2812 | /* correct session? */ | |
d96d6049 | 2813 | if (req->r_session != session) { |
2f2dc053 SW |
2814 | pr_err("mdsc_handle_reply got %llu on session mds%d" |
2815 | " not mds%d\n", tid, session->s_mds, | |
2816 | req->r_session ? req->r_session->s_mds : -1); | |
2817 | mutex_unlock(&mdsc->mutex); | |
2818 | goto out; | |
2819 | } | |
2820 | ||
2821 | /* dup? */ | |
bc2de10d JL |
2822 | if ((test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags) && !head->safe) || |
2823 | (test_bit(CEPH_MDS_R_GOT_SAFE, &req->r_req_flags) && head->safe)) { | |
f3ae1b97 | 2824 | pr_warn("got a dup %s reply on %llu from mds%d\n", |
2f2dc053 SW |
2825 | head->safe ? "safe" : "unsafe", tid, mds); |
2826 | mutex_unlock(&mdsc->mutex); | |
2827 | goto out; | |
2828 | } | |
bc2de10d | 2829 | if (test_bit(CEPH_MDS_R_GOT_SAFE, &req->r_req_flags)) { |
f3ae1b97 | 2830 | pr_warn("got unsafe after safe on %llu from mds%d\n", |
85792d0d SW |
2831 | tid, mds); |
2832 | mutex_unlock(&mdsc->mutex); | |
2833 | goto out; | |
2834 | } | |
2f2dc053 SW |
2835 | |
2836 | result = le32_to_cpu(head->result); | |
2837 | ||
2838 | /* | |
e55b71f8 GF |
2839 | * Handle an ESTALE |
2840 | * if we're not talking to the authority, send to them | |
2841 | * if the authority has changed while we weren't looking, | |
2842 | * send to new authority | |
2843 | * Otherwise we just have to return an ESTALE | |
2f2dc053 SW |
2844 | */ |
2845 | if (result == -ESTALE) { | |
4c069a58 | 2846 | dout("got ESTALE on request %llu\n", req->r_tid); |
51da8e8c | 2847 | req->r_resend_mds = -1; |
ca18bede | 2848 | if (req->r_direct_mode != USE_AUTH_MDS) { |
4c069a58 | 2849 | dout("not using auth, setting for that now\n"); |
e55b71f8 | 2850 | req->r_direct_mode = USE_AUTH_MDS; |
2f2dc053 SW |
2851 | __do_request(mdsc, req); |
2852 | mutex_unlock(&mdsc->mutex); | |
2853 | goto out; | |
e55b71f8 | 2854 | } else { |
ca18bede YZ |
2855 | int mds = __choose_mds(mdsc, req); |
2856 | if (mds >= 0 && mds != req->r_session->s_mds) { | |
4c069a58 | 2857 | dout("but auth changed, so resending\n"); |
e55b71f8 GF |
2858 | __do_request(mdsc, req); |
2859 | mutex_unlock(&mdsc->mutex); | |
2860 | goto out; | |
2861 | } | |
2f2dc053 | 2862 | } |
4c069a58 | 2863 | dout("have to return ESTALE on request %llu\n", req->r_tid); |
2f2dc053 SW |
2864 | } |
2865 | ||
e55b71f8 | 2866 | |
2f2dc053 | 2867 | if (head->safe) { |
bc2de10d | 2868 | set_bit(CEPH_MDS_R_GOT_SAFE, &req->r_req_flags); |
2f2dc053 | 2869 | __unregister_request(mdsc, req); |
2f2dc053 | 2870 | |
bc2de10d | 2871 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { |
2f2dc053 SW |
2872 | /* |
2873 | * We already handled the unsafe response, now do the | |
2874 | * cleanup. No need to examine the response; the MDS | |
2875 | * doesn't include any result info in the safe | |
2876 | * response. And even if it did, there is nothing | |
2877 | * useful we could do with a revised return value. | |
2878 | */ | |
2879 | dout("got safe reply %llu, mds%d\n", tid, mds); | |
2f2dc053 SW |
2880 | |
2881 | /* last unsafe request during umount? */ | |
44ca18f2 | 2882 | if (mdsc->stopping && !__get_oldest_req(mdsc)) |
03066f23 | 2883 | complete_all(&mdsc->safe_umount_waiters); |
2f2dc053 SW |
2884 | mutex_unlock(&mdsc->mutex); |
2885 | goto out; | |
2886 | } | |
e1518c7c | 2887 | } else { |
bc2de10d | 2888 | set_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags); |
2f2dc053 | 2889 | list_add_tail(&req->r_unsafe_item, &req->r_session->s_unsafe); |
4c06ace8 YZ |
2890 | if (req->r_unsafe_dir) { |
2891 | struct ceph_inode_info *ci = | |
2892 | ceph_inode(req->r_unsafe_dir); | |
2893 | spin_lock(&ci->i_unsafe_lock); | |
2894 | list_add_tail(&req->r_unsafe_dir_item, | |
2895 | &ci->i_unsafe_dirops); | |
2896 | spin_unlock(&ci->i_unsafe_lock); | |
2897 | } | |
2f2dc053 SW |
2898 | } |
2899 | ||
2900 | dout("handle_reply tid %lld result %d\n", tid, result); | |
2901 | rinfo = &req->r_reply_info; | |
b37fe1f9 YZ |
2902 | if (test_bit(CEPHFS_FEATURE_REPLY_ENCODING, &session->s_features)) |
2903 | err = parse_reply_info(msg, rinfo, (u64)-1); | |
2904 | else | |
2905 | err = parse_reply_info(msg, rinfo, session->s_con.peer_features); | |
2f2dc053 SW |
2906 | mutex_unlock(&mdsc->mutex); |
2907 | ||
2908 | mutex_lock(&session->s_mutex); | |
2909 | if (err < 0) { | |
25933abd | 2910 | pr_err("mdsc_handle_reply got corrupt reply mds%d(tid:%lld)\n", mds, tid); |
9ec7cab1 | 2911 | ceph_msg_dump(msg); |
2f2dc053 SW |
2912 | goto out_err; |
2913 | } | |
2914 | ||
2915 | /* snap trace */ | |
982d6011 | 2916 | realm = NULL; |
2f2dc053 SW |
2917 | if (rinfo->snapblob_len) { |
2918 | down_write(&mdsc->snap_rwsem); | |
2919 | ceph_update_snap_trace(mdsc, rinfo->snapblob, | |
982d6011 YZ |
2920 | rinfo->snapblob + rinfo->snapblob_len, |
2921 | le32_to_cpu(head->op) == CEPH_MDS_OP_RMSNAP, | |
2922 | &realm); | |
2f2dc053 SW |
2923 | downgrade_write(&mdsc->snap_rwsem); |
2924 | } else { | |
2925 | down_read(&mdsc->snap_rwsem); | |
2926 | } | |
2927 | ||
2928 | /* insert trace into our cache */ | |
b4556396 | 2929 | mutex_lock(&req->r_fill_mutex); |
315f2408 | 2930 | current->journal_info = req; |
f5a03b08 | 2931 | err = ceph_fill_trace(mdsc->fsc->sb, req); |
2f2dc053 | 2932 | if (err == 0) { |
6e8575fa | 2933 | if (result == 0 && (req->r_op == CEPH_MDS_OP_READDIR || |
81c6aea5 | 2934 | req->r_op == CEPH_MDS_OP_LSSNAP)) |
2f2dc053 | 2935 | ceph_readdir_prepopulate(req, req->r_session); |
2f2dc053 | 2936 | } |
315f2408 | 2937 | current->journal_info = NULL; |
b4556396 | 2938 | mutex_unlock(&req->r_fill_mutex); |
2f2dc053 SW |
2939 | |
2940 | up_read(&mdsc->snap_rwsem); | |
982d6011 YZ |
2941 | if (realm) |
2942 | ceph_put_snap_realm(mdsc, realm); | |
68cd5b4b | 2943 | |
fe33032d YZ |
2944 | if (err == 0) { |
2945 | if (req->r_target_inode && | |
2946 | test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { | |
2947 | struct ceph_inode_info *ci = | |
2948 | ceph_inode(req->r_target_inode); | |
2949 | spin_lock(&ci->i_unsafe_lock); | |
2950 | list_add_tail(&req->r_unsafe_target_item, | |
2951 | &ci->i_unsafe_iops); | |
2952 | spin_unlock(&ci->i_unsafe_lock); | |
2953 | } | |
2954 | ||
2955 | ceph_unreserve_caps(mdsc, &req->r_caps_reservation); | |
68cd5b4b | 2956 | } |
2f2dc053 | 2957 | out_err: |
e1518c7c | 2958 | mutex_lock(&mdsc->mutex); |
bc2de10d | 2959 | if (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { |
e1518c7c SW |
2960 | if (err) { |
2961 | req->r_err = err; | |
2962 | } else { | |
5fdb1389 | 2963 | req->r_reply = ceph_msg_get(msg); |
bc2de10d | 2964 | set_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags); |
e1518c7c | 2965 | } |
2f2dc053 | 2966 | } else { |
e1518c7c | 2967 | dout("reply arrived after request %lld was aborted\n", tid); |
2f2dc053 | 2968 | } |
e1518c7c | 2969 | mutex_unlock(&mdsc->mutex); |
2f2dc053 | 2970 | |
2f2dc053 SW |
2971 | mutex_unlock(&session->s_mutex); |
2972 | ||
2973 | /* kick calling process */ | |
2974 | complete_request(mdsc, req); | |
2975 | out: | |
2976 | ceph_mdsc_put_request(req); | |
2977 | return; | |
2978 | } | |
2979 | ||
2980 | ||
2981 | ||
2982 | /* | |
2983 | * handle mds notification that our request has been forwarded. | |
2984 | */ | |
2600d2dd SW |
2985 | static void handle_forward(struct ceph_mds_client *mdsc, |
2986 | struct ceph_mds_session *session, | |
2987 | struct ceph_msg *msg) | |
2f2dc053 SW |
2988 | { |
2989 | struct ceph_mds_request *req; | |
a1ea787c | 2990 | u64 tid = le64_to_cpu(msg->hdr.tid); |
2f2dc053 SW |
2991 | u32 next_mds; |
2992 | u32 fwd_seq; | |
2f2dc053 SW |
2993 | int err = -EINVAL; |
2994 | void *p = msg->front.iov_base; | |
2995 | void *end = p + msg->front.iov_len; | |
2f2dc053 | 2996 | |
a1ea787c | 2997 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); |
c89136ea SW |
2998 | next_mds = ceph_decode_32(&p); |
2999 | fwd_seq = ceph_decode_32(&p); | |
2f2dc053 SW |
3000 | |
3001 | mutex_lock(&mdsc->mutex); | |
fcd00b68 | 3002 | req = lookup_get_request(mdsc, tid); |
2f2dc053 | 3003 | if (!req) { |
2a8e5e36 | 3004 | dout("forward tid %llu to mds%d - req dne\n", tid, next_mds); |
2f2dc053 SW |
3005 | goto out; /* dup reply? */ |
3006 | } | |
3007 | ||
bc2de10d | 3008 | if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { |
2a8e5e36 SW |
3009 | dout("forward tid %llu aborted, unregistering\n", tid); |
3010 | __unregister_request(mdsc, req); | |
3011 | } else if (fwd_seq <= req->r_num_fwd) { | |
3012 | dout("forward tid %llu to mds%d - old seq %d <= %d\n", | |
2f2dc053 SW |
3013 | tid, next_mds, req->r_num_fwd, fwd_seq); |
3014 | } else { | |
3015 | /* resend. forward race not possible; mds would drop */ | |
2a8e5e36 SW |
3016 | dout("forward tid %llu to mds%d (we resend)\n", tid, next_mds); |
3017 | BUG_ON(req->r_err); | |
bc2de10d | 3018 | BUG_ON(test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)); |
3de22be6 | 3019 | req->r_attempts = 0; |
2f2dc053 SW |
3020 | req->r_num_fwd = fwd_seq; |
3021 | req->r_resend_mds = next_mds; | |
3022 | put_request_session(req); | |
3023 | __do_request(mdsc, req); | |
3024 | } | |
3025 | ceph_mdsc_put_request(req); | |
3026 | out: | |
3027 | mutex_unlock(&mdsc->mutex); | |
3028 | return; | |
3029 | ||
3030 | bad: | |
3031 | pr_err("mdsc_handle_forward decode error err=%d\n", err); | |
3032 | } | |
3033 | ||
131d7eb4 YZ |
3034 | static int __decode_session_metadata(void **p, void *end, |
3035 | bool *blacklisted) | |
84bf3950 YZ |
3036 | { |
3037 | /* map<string,string> */ | |
3038 | u32 n; | |
131d7eb4 | 3039 | bool err_str; |
84bf3950 YZ |
3040 | ceph_decode_32_safe(p, end, n, bad); |
3041 | while (n-- > 0) { | |
3042 | u32 len; | |
3043 | ceph_decode_32_safe(p, end, len, bad); | |
3044 | ceph_decode_need(p, end, len, bad); | |
131d7eb4 | 3045 | err_str = !strncmp(*p, "error_string", len); |
84bf3950 YZ |
3046 | *p += len; |
3047 | ceph_decode_32_safe(p, end, len, bad); | |
3048 | ceph_decode_need(p, end, len, bad); | |
131d7eb4 YZ |
3049 | if (err_str && strnstr(*p, "blacklisted", len)) |
3050 | *blacklisted = true; | |
84bf3950 YZ |
3051 | *p += len; |
3052 | } | |
3053 | return 0; | |
3054 | bad: | |
3055 | return -1; | |
3056 | } | |
3057 | ||
2f2dc053 SW |
3058 | /* |
3059 | * handle a mds session control message | |
3060 | */ | |
3061 | static void handle_session(struct ceph_mds_session *session, | |
3062 | struct ceph_msg *msg) | |
3063 | { | |
3064 | struct ceph_mds_client *mdsc = session->s_mdsc; | |
84bf3950 YZ |
3065 | int mds = session->s_mds; |
3066 | int msg_version = le16_to_cpu(msg->hdr.version); | |
3067 | void *p = msg->front.iov_base; | |
3068 | void *end = p + msg->front.iov_len; | |
3069 | struct ceph_mds_session_head *h; | |
2f2dc053 SW |
3070 | u32 op; |
3071 | u64 seq; | |
84bf3950 | 3072 | unsigned long features = 0; |
2f2dc053 | 3073 | int wake = 0; |
131d7eb4 | 3074 | bool blacklisted = false; |
2f2dc053 | 3075 | |
2f2dc053 | 3076 | /* decode */ |
84bf3950 YZ |
3077 | ceph_decode_need(&p, end, sizeof(*h), bad); |
3078 | h = p; | |
3079 | p += sizeof(*h); | |
3080 | ||
2f2dc053 SW |
3081 | op = le32_to_cpu(h->op); |
3082 | seq = le64_to_cpu(h->seq); | |
3083 | ||
84bf3950 YZ |
3084 | if (msg_version >= 3) { |
3085 | u32 len; | |
3086 | /* version >= 2, metadata */ | |
131d7eb4 | 3087 | if (__decode_session_metadata(&p, end, &blacklisted) < 0) |
84bf3950 YZ |
3088 | goto bad; |
3089 | /* version >= 3, feature bits */ | |
3090 | ceph_decode_32_safe(&p, end, len, bad); | |
3091 | ceph_decode_need(&p, end, len, bad); | |
3092 | memcpy(&features, p, min_t(size_t, len, sizeof(features))); | |
3093 | p += len; | |
3094 | } | |
3095 | ||
2f2dc053 | 3096 | mutex_lock(&mdsc->mutex); |
0a07fc8c YZ |
3097 | if (op == CEPH_SESSION_CLOSE) { |
3098 | get_session(session); | |
2600d2dd | 3099 | __unregister_session(mdsc, session); |
0a07fc8c | 3100 | } |
2f2dc053 SW |
3101 | /* FIXME: this ttl calculation is generous */ |
3102 | session->s_ttl = jiffies + HZ*mdsc->mdsmap->m_session_autoclose; | |
3103 | mutex_unlock(&mdsc->mutex); | |
3104 | ||
3105 | mutex_lock(&session->s_mutex); | |
3106 | ||
3107 | dout("handle_session mds%d %s %p state %s seq %llu\n", | |
3108 | mds, ceph_session_op_name(op), session, | |
a687ecaf | 3109 | ceph_session_state_name(session->s_state), seq); |
2f2dc053 SW |
3110 | |
3111 | if (session->s_state == CEPH_MDS_SESSION_HUNG) { | |
3112 | session->s_state = CEPH_MDS_SESSION_OPEN; | |
3113 | pr_info("mds%d came back\n", session->s_mds); | |
3114 | } | |
3115 | ||
3116 | switch (op) { | |
3117 | case CEPH_SESSION_OPEN: | |
29790f26 SW |
3118 | if (session->s_state == CEPH_MDS_SESSION_RECONNECTING) |
3119 | pr_info("mds%d reconnect success\n", session->s_mds); | |
2f2dc053 | 3120 | session->s_state = CEPH_MDS_SESSION_OPEN; |
84bf3950 | 3121 | session->s_features = features; |
2f2dc053 SW |
3122 | renewed_caps(mdsc, session, 0); |
3123 | wake = 1; | |
3124 | if (mdsc->stopping) | |
3125 | __close_session(mdsc, session); | |
3126 | break; | |
3127 | ||
3128 | case CEPH_SESSION_RENEWCAPS: | |
3129 | if (session->s_renew_seq == seq) | |
3130 | renewed_caps(mdsc, session, 1); | |
3131 | break; | |
3132 | ||
3133 | case CEPH_SESSION_CLOSE: | |
29790f26 SW |
3134 | if (session->s_state == CEPH_MDS_SESSION_RECONNECTING) |
3135 | pr_info("mds%d reconnect denied\n", session->s_mds); | |
1c841a96 | 3136 | cleanup_session_requests(mdsc, session); |
2f2dc053 | 3137 | remove_session_caps(session); |
656e4382 | 3138 | wake = 2; /* for good measure */ |
f3c60c59 | 3139 | wake_up_all(&mdsc->session_close_wq); |
2f2dc053 SW |
3140 | break; |
3141 | ||
3142 | case CEPH_SESSION_STALE: | |
3143 | pr_info("mds%d caps went stale, renewing\n", | |
3144 | session->s_mds); | |
d8fb02ab | 3145 | spin_lock(&session->s_gen_ttl_lock); |
2f2dc053 | 3146 | session->s_cap_gen++; |
1ce208a6 | 3147 | session->s_cap_ttl = jiffies - 1; |
d8fb02ab | 3148 | spin_unlock(&session->s_gen_ttl_lock); |
2f2dc053 SW |
3149 | send_renew_caps(mdsc, session); |
3150 | break; | |
3151 | ||
3152 | case CEPH_SESSION_RECALL_STATE: | |
e30ee581 | 3153 | ceph_trim_caps(mdsc, session, le32_to_cpu(h->max_caps)); |
2f2dc053 SW |
3154 | break; |
3155 | ||
186e4f7a YZ |
3156 | case CEPH_SESSION_FLUSHMSG: |
3157 | send_flushmsg_ack(mdsc, session, seq); | |
3158 | break; | |
3159 | ||
03f4fcb0 YZ |
3160 | case CEPH_SESSION_FORCE_RO: |
3161 | dout("force_session_readonly %p\n", session); | |
3162 | spin_lock(&session->s_cap_lock); | |
3163 | session->s_readonly = true; | |
3164 | spin_unlock(&session->s_cap_lock); | |
d2f8bb27 | 3165 | wake_up_session_caps(session, FORCE_RO); |
03f4fcb0 YZ |
3166 | break; |
3167 | ||
fcff415c YZ |
3168 | case CEPH_SESSION_REJECT: |
3169 | WARN_ON(session->s_state != CEPH_MDS_SESSION_OPENING); | |
3170 | pr_info("mds%d rejected session\n", session->s_mds); | |
3171 | session->s_state = CEPH_MDS_SESSION_REJECTED; | |
3172 | cleanup_session_requests(mdsc, session); | |
3173 | remove_session_caps(session); | |
131d7eb4 YZ |
3174 | if (blacklisted) |
3175 | mdsc->fsc->blacklisted = true; | |
fcff415c YZ |
3176 | wake = 2; /* for good measure */ |
3177 | break; | |
3178 | ||
2f2dc053 SW |
3179 | default: |
3180 | pr_err("mdsc_handle_session bad op %d mds%d\n", op, mds); | |
3181 | WARN_ON(1); | |
3182 | } | |
3183 | ||
3184 | mutex_unlock(&session->s_mutex); | |
3185 | if (wake) { | |
3186 | mutex_lock(&mdsc->mutex); | |
3187 | __wake_requests(mdsc, &session->s_waiting); | |
656e4382 YZ |
3188 | if (wake == 2) |
3189 | kick_requests(mdsc, mds); | |
2f2dc053 SW |
3190 | mutex_unlock(&mdsc->mutex); |
3191 | } | |
0a07fc8c YZ |
3192 | if (op == CEPH_SESSION_CLOSE) |
3193 | ceph_put_mds_session(session); | |
2f2dc053 SW |
3194 | return; |
3195 | ||
3196 | bad: | |
3197 | pr_err("mdsc_handle_session corrupt message mds%d len %d\n", mds, | |
3198 | (int)msg->front.iov_len); | |
9ec7cab1 | 3199 | ceph_msg_dump(msg); |
2f2dc053 SW |
3200 | return; |
3201 | } | |
3202 | ||
3203 | ||
3204 | /* | |
3205 | * called under session->mutex. | |
3206 | */ | |
3207 | static void replay_unsafe_requests(struct ceph_mds_client *mdsc, | |
3208 | struct ceph_mds_session *session) | |
3209 | { | |
3210 | struct ceph_mds_request *req, *nreq; | |
3de22be6 | 3211 | struct rb_node *p; |
2f2dc053 SW |
3212 | int err; |
3213 | ||
3214 | dout("replay_unsafe_requests mds%d\n", session->s_mds); | |
3215 | ||
3216 | mutex_lock(&mdsc->mutex); | |
3217 | list_for_each_entry_safe(req, nreq, &session->s_unsafe, r_unsafe_item) { | |
6e6f0923 | 3218 | err = __prepare_send_request(mdsc, req, session->s_mds, true); |
2f2dc053 SW |
3219 | if (!err) { |
3220 | ceph_msg_get(req->r_request); | |
3221 | ceph_con_send(&session->s_con, req->r_request); | |
3222 | } | |
3223 | } | |
3de22be6 YZ |
3224 | |
3225 | /* | |
3226 | * also re-send old requests when MDS enters reconnect stage. So that MDS | |
3227 | * can process completed request in clientreplay stage. | |
3228 | */ | |
3229 | p = rb_first(&mdsc->request_tree); | |
3230 | while (p) { | |
3231 | req = rb_entry(p, struct ceph_mds_request, r_node); | |
3232 | p = rb_next(p); | |
bc2de10d | 3233 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) |
3de22be6 YZ |
3234 | continue; |
3235 | if (req->r_attempts == 0) | |
3236 | continue; /* only old requests */ | |
3237 | if (req->r_session && | |
3238 | req->r_session->s_mds == session->s_mds) { | |
6e6f0923 YZ |
3239 | err = __prepare_send_request(mdsc, req, |
3240 | session->s_mds, true); | |
3de22be6 YZ |
3241 | if (!err) { |
3242 | ceph_msg_get(req->r_request); | |
3243 | ceph_con_send(&session->s_con, req->r_request); | |
3244 | } | |
3245 | } | |
3246 | } | |
2f2dc053 SW |
3247 | mutex_unlock(&mdsc->mutex); |
3248 | } | |
3249 | ||
81c5a148 YZ |
3250 | static int send_reconnect_partial(struct ceph_reconnect_state *recon_state) |
3251 | { | |
3252 | struct ceph_msg *reply; | |
3253 | struct ceph_pagelist *_pagelist; | |
3254 | struct page *page; | |
3255 | __le32 *addr; | |
3256 | int err = -ENOMEM; | |
3257 | ||
3258 | if (!recon_state->allow_multi) | |
3259 | return -ENOSPC; | |
3260 | ||
3261 | /* can't handle message that contains both caps and realm */ | |
3262 | BUG_ON(!recon_state->nr_caps == !recon_state->nr_realms); | |
3263 | ||
3264 | /* pre-allocate new pagelist */ | |
3265 | _pagelist = ceph_pagelist_alloc(GFP_NOFS); | |
3266 | if (!_pagelist) | |
3267 | return -ENOMEM; | |
3268 | ||
3269 | reply = ceph_msg_new2(CEPH_MSG_CLIENT_RECONNECT, 0, 1, GFP_NOFS, false); | |
3270 | if (!reply) | |
3271 | goto fail_msg; | |
3272 | ||
3273 | /* placeholder for nr_caps */ | |
3274 | err = ceph_pagelist_encode_32(_pagelist, 0); | |
3275 | if (err < 0) | |
3276 | goto fail; | |
3277 | ||
3278 | if (recon_state->nr_caps) { | |
3279 | /* currently encoding caps */ | |
3280 | err = ceph_pagelist_encode_32(recon_state->pagelist, 0); | |
3281 | if (err) | |
3282 | goto fail; | |
3283 | } else { | |
3284 | /* placeholder for nr_realms (currently encoding relams) */ | |
3285 | err = ceph_pagelist_encode_32(_pagelist, 0); | |
3286 | if (err < 0) | |
3287 | goto fail; | |
3288 | } | |
3289 | ||
3290 | err = ceph_pagelist_encode_8(recon_state->pagelist, 1); | |
3291 | if (err) | |
3292 | goto fail; | |
3293 | ||
3294 | page = list_first_entry(&recon_state->pagelist->head, struct page, lru); | |
3295 | addr = kmap_atomic(page); | |
3296 | if (recon_state->nr_caps) { | |
3297 | /* currently encoding caps */ | |
3298 | *addr = cpu_to_le32(recon_state->nr_caps); | |
3299 | } else { | |
3300 | /* currently encoding relams */ | |
3301 | *(addr + 1) = cpu_to_le32(recon_state->nr_realms); | |
3302 | } | |
3303 | kunmap_atomic(addr); | |
3304 | ||
3305 | reply->hdr.version = cpu_to_le16(5); | |
3306 | reply->hdr.compat_version = cpu_to_le16(4); | |
3307 | ||
3308 | reply->hdr.data_len = cpu_to_le32(recon_state->pagelist->length); | |
3309 | ceph_msg_data_add_pagelist(reply, recon_state->pagelist); | |
3310 | ||
3311 | ceph_con_send(&recon_state->session->s_con, reply); | |
3312 | ceph_pagelist_release(recon_state->pagelist); | |
3313 | ||
3314 | recon_state->pagelist = _pagelist; | |
3315 | recon_state->nr_caps = 0; | |
3316 | recon_state->nr_realms = 0; | |
3317 | recon_state->msg_version = 5; | |
3318 | return 0; | |
3319 | fail: | |
3320 | ceph_msg_put(reply); | |
3321 | fail_msg: | |
3322 | ceph_pagelist_release(_pagelist); | |
3323 | return err; | |
3324 | } | |
3325 | ||
2f2dc053 SW |
3326 | /* |
3327 | * Encode information about a cap for a reconnect with the MDS. | |
3328 | */ | |
2f2dc053 SW |
3329 | static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap, |
3330 | void *arg) | |
3331 | { | |
20cb34ae SW |
3332 | union { |
3333 | struct ceph_mds_cap_reconnect v2; | |
3334 | struct ceph_mds_cap_reconnect_v1 v1; | |
3335 | } rec; | |
b3f8d68f | 3336 | struct ceph_inode_info *ci = cap->ci; |
20cb34ae SW |
3337 | struct ceph_reconnect_state *recon_state = arg; |
3338 | struct ceph_pagelist *pagelist = recon_state->pagelist; | |
5ccedf1c | 3339 | int err; |
3469ed0d | 3340 | u64 snap_follows; |
2f2dc053 | 3341 | |
2f2dc053 SW |
3342 | dout(" adding %p ino %llx.%llx cap %p %lld %s\n", |
3343 | inode, ceph_vinop(inode), cap, cap->cap_id, | |
3344 | ceph_cap_string(cap->issued)); | |
2f2dc053 | 3345 | |
be655596 | 3346 | spin_lock(&ci->i_ceph_lock); |
2f2dc053 SW |
3347 | cap->seq = 0; /* reset cap seq */ |
3348 | cap->issue_seq = 0; /* and issue_seq */ | |
667ca05c | 3349 | cap->mseq = 0; /* and migrate_seq */ |
99a9c273 | 3350 | cap->cap_gen = cap->session->s_cap_gen; |
20cb34ae | 3351 | |
121f22a1 | 3352 | if (recon_state->msg_version >= 2) { |
20cb34ae SW |
3353 | rec.v2.cap_id = cpu_to_le64(cap->cap_id); |
3354 | rec.v2.wanted = cpu_to_le32(__ceph_caps_wanted(ci)); | |
3355 | rec.v2.issued = cpu_to_le32(cap->issued); | |
3356 | rec.v2.snaprealm = cpu_to_le64(ci->i_snap_realm->ino); | |
5ccedf1c | 3357 | rec.v2.pathbase = 0; |
ec1dff25 JL |
3358 | rec.v2.flock_len = (__force __le32) |
3359 | ((ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) ? 0 : 1); | |
20cb34ae SW |
3360 | } else { |
3361 | rec.v1.cap_id = cpu_to_le64(cap->cap_id); | |
3362 | rec.v1.wanted = cpu_to_le32(__ceph_caps_wanted(ci)); | |
3363 | rec.v1.issued = cpu_to_le32(cap->issued); | |
3364 | rec.v1.size = cpu_to_le64(inode->i_size); | |
9bbeab41 AB |
3365 | ceph_encode_timespec64(&rec.v1.mtime, &inode->i_mtime); |
3366 | ceph_encode_timespec64(&rec.v1.atime, &inode->i_atime); | |
20cb34ae | 3367 | rec.v1.snaprealm = cpu_to_le64(ci->i_snap_realm->ino); |
5ccedf1c | 3368 | rec.v1.pathbase = 0; |
20cb34ae | 3369 | } |
3469ed0d YZ |
3370 | |
3371 | if (list_empty(&ci->i_cap_snaps)) { | |
92776fd2 | 3372 | snap_follows = ci->i_head_snapc ? ci->i_head_snapc->seq : 0; |
3469ed0d YZ |
3373 | } else { |
3374 | struct ceph_cap_snap *capsnap = | |
3375 | list_first_entry(&ci->i_cap_snaps, | |
3376 | struct ceph_cap_snap, ci_item); | |
3377 | snap_follows = capsnap->follows; | |
20cb34ae | 3378 | } |
be655596 | 3379 | spin_unlock(&ci->i_ceph_lock); |
2f2dc053 | 3380 | |
121f22a1 | 3381 | if (recon_state->msg_version >= 2) { |
40819f6f | 3382 | int num_fcntl_locks, num_flock_locks; |
4deb14a2 | 3383 | struct ceph_filelock *flocks = NULL; |
81c5a148 | 3384 | size_t struct_len, total_len = sizeof(u64); |
121f22a1 | 3385 | u8 struct_v = 0; |
39be95e9 JS |
3386 | |
3387 | encode_again: | |
b3f8d68f YZ |
3388 | if (rec.v2.flock_len) { |
3389 | ceph_count_locks(inode, &num_fcntl_locks, &num_flock_locks); | |
3390 | } else { | |
3391 | num_fcntl_locks = 0; | |
3392 | num_flock_locks = 0; | |
3393 | } | |
4deb14a2 | 3394 | if (num_fcntl_locks + num_flock_locks > 0) { |
6da2ec56 KC |
3395 | flocks = kmalloc_array(num_fcntl_locks + num_flock_locks, |
3396 | sizeof(struct ceph_filelock), | |
3397 | GFP_NOFS); | |
4deb14a2 YZ |
3398 | if (!flocks) { |
3399 | err = -ENOMEM; | |
5ccedf1c | 3400 | goto out_err; |
4deb14a2 YZ |
3401 | } |
3402 | err = ceph_encode_locks_to_buffer(inode, flocks, | |
3403 | num_fcntl_locks, | |
3404 | num_flock_locks); | |
3405 | if (err) { | |
3406 | kfree(flocks); | |
3407 | flocks = NULL; | |
3408 | if (err == -ENOSPC) | |
3409 | goto encode_again; | |
5ccedf1c | 3410 | goto out_err; |
4deb14a2 YZ |
3411 | } |
3412 | } else { | |
39be95e9 | 3413 | kfree(flocks); |
4deb14a2 | 3414 | flocks = NULL; |
39be95e9 | 3415 | } |
121f22a1 YZ |
3416 | |
3417 | if (recon_state->msg_version >= 3) { | |
3418 | /* version, compat_version and struct_len */ | |
81c5a148 | 3419 | total_len += 2 * sizeof(u8) + sizeof(u32); |
3469ed0d | 3420 | struct_v = 2; |
121f22a1 | 3421 | } |
39be95e9 JS |
3422 | /* |
3423 | * number of encoded locks is stable, so copy to pagelist | |
3424 | */ | |
121f22a1 YZ |
3425 | struct_len = 2 * sizeof(u32) + |
3426 | (num_fcntl_locks + num_flock_locks) * | |
3427 | sizeof(struct ceph_filelock); | |
3428 | rec.v2.flock_len = cpu_to_le32(struct_len); | |
3429 | ||
5ccedf1c | 3430 | struct_len += sizeof(u32) + sizeof(rec.v2); |
121f22a1 | 3431 | |
3469ed0d YZ |
3432 | if (struct_v >= 2) |
3433 | struct_len += sizeof(u64); /* snap_follows */ | |
3434 | ||
121f22a1 | 3435 | total_len += struct_len; |
81c5a148 YZ |
3436 | |
3437 | if (pagelist->length + total_len > RECONNECT_MAX_SIZE) { | |
3438 | err = send_reconnect_partial(recon_state); | |
3439 | if (err) | |
3440 | goto out_freeflocks; | |
3441 | pagelist = recon_state->pagelist; | |
5ccedf1c | 3442 | } |
121f22a1 | 3443 | |
81c5a148 YZ |
3444 | err = ceph_pagelist_reserve(pagelist, total_len); |
3445 | if (err) | |
3446 | goto out_freeflocks; | |
3447 | ||
3448 | ceph_pagelist_encode_64(pagelist, ceph_ino(inode)); | |
5ccedf1c YZ |
3449 | if (recon_state->msg_version >= 3) { |
3450 | ceph_pagelist_encode_8(pagelist, struct_v); | |
3451 | ceph_pagelist_encode_8(pagelist, 1); | |
3452 | ceph_pagelist_encode_32(pagelist, struct_len); | |
121f22a1 | 3453 | } |
5ccedf1c YZ |
3454 | ceph_pagelist_encode_string(pagelist, NULL, 0); |
3455 | ceph_pagelist_append(pagelist, &rec, sizeof(rec.v2)); | |
3456 | ceph_locks_to_pagelist(flocks, pagelist, | |
3457 | num_fcntl_locks, num_flock_locks); | |
3458 | if (struct_v >= 2) | |
3459 | ceph_pagelist_encode_64(pagelist, snap_follows); | |
81c5a148 | 3460 | out_freeflocks: |
39be95e9 | 3461 | kfree(flocks); |
3612abbd | 3462 | } else { |
5ccedf1c YZ |
3463 | u64 pathbase = 0; |
3464 | int pathlen = 0; | |
3465 | char *path = NULL; | |
3466 | struct dentry *dentry; | |
3467 | ||
3468 | dentry = d_find_alias(inode); | |
3469 | if (dentry) { | |
3470 | path = ceph_mdsc_build_path(dentry, | |
3471 | &pathlen, &pathbase, 0); | |
3472 | dput(dentry); | |
3473 | if (IS_ERR(path)) { | |
3474 | err = PTR_ERR(path); | |
3475 | goto out_err; | |
3476 | } | |
3477 | rec.v1.pathbase = cpu_to_le64(pathbase); | |
121f22a1 | 3478 | } |
5ccedf1c YZ |
3479 | |
3480 | err = ceph_pagelist_reserve(pagelist, | |
81c5a148 YZ |
3481 | sizeof(u64) + sizeof(u32) + |
3482 | pathlen + sizeof(rec.v1)); | |
5ccedf1c | 3483 | if (err) { |
81c5a148 | 3484 | goto out_freepath; |
5ccedf1c YZ |
3485 | } |
3486 | ||
81c5a148 | 3487 | ceph_pagelist_encode_64(pagelist, ceph_ino(inode)); |
5ccedf1c YZ |
3488 | ceph_pagelist_encode_string(pagelist, path, pathlen); |
3489 | ceph_pagelist_append(pagelist, &rec, sizeof(rec.v1)); | |
81c5a148 | 3490 | out_freepath: |
f77f21bb | 3491 | ceph_mdsc_free_path(path, pathlen); |
40819f6f | 3492 | } |
44c99757 | 3493 | |
5ccedf1c | 3494 | out_err: |
81c5a148 YZ |
3495 | if (err >= 0) |
3496 | recon_state->nr_caps++; | |
3497 | return err; | |
3498 | } | |
3499 | ||
3500 | static int encode_snap_realms(struct ceph_mds_client *mdsc, | |
3501 | struct ceph_reconnect_state *recon_state) | |
3502 | { | |
3503 | struct rb_node *p; | |
3504 | struct ceph_pagelist *pagelist = recon_state->pagelist; | |
3505 | int err = 0; | |
3506 | ||
3507 | if (recon_state->msg_version >= 4) { | |
3508 | err = ceph_pagelist_encode_32(pagelist, mdsc->num_snap_realms); | |
3509 | if (err < 0) | |
3510 | goto fail; | |
3511 | } | |
3512 | ||
3513 | /* | |
3514 | * snaprealms. we provide mds with the ino, seq (version), and | |
3515 | * parent for all of our realms. If the mds has any newer info, | |
3516 | * it will tell us. | |
3517 | */ | |
3518 | for (p = rb_first(&mdsc->snap_realms); p; p = rb_next(p)) { | |
3519 | struct ceph_snap_realm *realm = | |
3520 | rb_entry(p, struct ceph_snap_realm, node); | |
3521 | struct ceph_mds_snaprealm_reconnect sr_rec; | |
3522 | ||
3523 | if (recon_state->msg_version >= 4) { | |
3524 | size_t need = sizeof(u8) * 2 + sizeof(u32) + | |
3525 | sizeof(sr_rec); | |
3526 | ||
3527 | if (pagelist->length + need > RECONNECT_MAX_SIZE) { | |
3528 | err = send_reconnect_partial(recon_state); | |
3529 | if (err) | |
3530 | goto fail; | |
3531 | pagelist = recon_state->pagelist; | |
3532 | } | |
3533 | ||
3534 | err = ceph_pagelist_reserve(pagelist, need); | |
3535 | if (err) | |
3536 | goto fail; | |
3537 | ||
3538 | ceph_pagelist_encode_8(pagelist, 1); | |
3539 | ceph_pagelist_encode_8(pagelist, 1); | |
3540 | ceph_pagelist_encode_32(pagelist, sizeof(sr_rec)); | |
3541 | } | |
3542 | ||
3543 | dout(" adding snap realm %llx seq %lld parent %llx\n", | |
3544 | realm->ino, realm->seq, realm->parent_ino); | |
3545 | sr_rec.ino = cpu_to_le64(realm->ino); | |
3546 | sr_rec.seq = cpu_to_le64(realm->seq); | |
3547 | sr_rec.parent = cpu_to_le64(realm->parent_ino); | |
3548 | ||
3549 | err = ceph_pagelist_append(pagelist, &sr_rec, sizeof(sr_rec)); | |
3550 | if (err) | |
3551 | goto fail; | |
3552 | ||
3553 | recon_state->nr_realms++; | |
3554 | } | |
3555 | fail: | |
93cea5be | 3556 | return err; |
2f2dc053 SW |
3557 | } |
3558 | ||
3559 | ||
3560 | /* | |
3561 | * If an MDS fails and recovers, clients need to reconnect in order to | |
3562 | * reestablish shared state. This includes all caps issued through | |
3563 | * this session _and_ the snap_realm hierarchy. Because it's not | |
3564 | * clear which snap realms the mds cares about, we send everything we | |
3565 | * know about.. that ensures we'll then get any new info the | |
3566 | * recovering MDS might have. | |
3567 | * | |
3568 | * This is a relatively heavyweight operation, but it's rare. | |
3569 | * | |
3570 | * called with mdsc->mutex held. | |
3571 | */ | |
34b6c855 SW |
3572 | static void send_mds_reconnect(struct ceph_mds_client *mdsc, |
3573 | struct ceph_mds_session *session) | |
2f2dc053 | 3574 | { |
2f2dc053 | 3575 | struct ceph_msg *reply; |
34b6c855 | 3576 | int mds = session->s_mds; |
9abf82b8 | 3577 | int err = -ENOMEM; |
81c5a148 YZ |
3578 | struct ceph_reconnect_state recon_state = { |
3579 | .session = session, | |
3580 | }; | |
c8a96a31 | 3581 | LIST_HEAD(dispose); |
2f2dc053 | 3582 | |
34b6c855 | 3583 | pr_info("mds%d reconnect start\n", mds); |
2f2dc053 | 3584 | |
81c5a148 YZ |
3585 | recon_state.pagelist = ceph_pagelist_alloc(GFP_NOFS); |
3586 | if (!recon_state.pagelist) | |
93cea5be | 3587 | goto fail_nopagelist; |
93cea5be | 3588 | |
0d9c1ab3 | 3589 | reply = ceph_msg_new2(CEPH_MSG_CLIENT_RECONNECT, 0, 1, GFP_NOFS, false); |
a79832f2 | 3590 | if (!reply) |
93cea5be | 3591 | goto fail_nomsg; |
93cea5be | 3592 | |
34b6c855 SW |
3593 | mutex_lock(&session->s_mutex); |
3594 | session->s_state = CEPH_MDS_SESSION_RECONNECTING; | |
3595 | session->s_seq = 0; | |
2f2dc053 | 3596 | |
2f2dc053 | 3597 | dout("session %p state %s\n", session, |
a687ecaf | 3598 | ceph_session_state_name(session->s_state)); |
2f2dc053 | 3599 | |
99a9c273 YZ |
3600 | spin_lock(&session->s_gen_ttl_lock); |
3601 | session->s_cap_gen++; | |
3602 | spin_unlock(&session->s_gen_ttl_lock); | |
3603 | ||
3604 | spin_lock(&session->s_cap_lock); | |
03f4fcb0 YZ |
3605 | /* don't know if session is readonly */ |
3606 | session->s_readonly = 0; | |
99a9c273 YZ |
3607 | /* |
3608 | * notify __ceph_remove_cap() that we are composing cap reconnect. | |
3609 | * If a cap get released before being added to the cap reconnect, | |
3610 | * __ceph_remove_cap() should skip queuing cap release. | |
3611 | */ | |
3612 | session->s_cap_reconnect = 1; | |
e01a5946 | 3613 | /* drop old cap expires; we're about to reestablish that state */ |
c8a96a31 JL |
3614 | detach_cap_releases(session, &dispose); |
3615 | spin_unlock(&session->s_cap_lock); | |
3616 | dispose_cap_releases(mdsc, &dispose); | |
e01a5946 | 3617 | |
5d23371f | 3618 | /* trim unused caps to reduce MDS's cache rejoin time */ |
c0bd50e2 YZ |
3619 | if (mdsc->fsc->sb->s_root) |
3620 | shrink_dcache_parent(mdsc->fsc->sb->s_root); | |
5d23371f YZ |
3621 | |
3622 | ceph_con_close(&session->s_con); | |
3623 | ceph_con_open(&session->s_con, | |
3624 | CEPH_ENTITY_TYPE_MDS, mds, | |
3625 | ceph_mdsmap_get_addr(mdsc->mdsmap, mds)); | |
3626 | ||
3627 | /* replay unsafe requests */ | |
3628 | replay_unsafe_requests(mdsc, session); | |
3629 | ||
81c5a148 YZ |
3630 | ceph_early_kick_flushing_caps(mdsc, session); |
3631 | ||
5d23371f YZ |
3632 | down_read(&mdsc->snap_rwsem); |
3633 | ||
81c5a148 YZ |
3634 | /* placeholder for nr_caps */ |
3635 | err = ceph_pagelist_encode_32(recon_state.pagelist, 0); | |
93cea5be SW |
3636 | if (err) |
3637 | goto fail; | |
20cb34ae | 3638 | |
81c5a148 | 3639 | if (test_bit(CEPHFS_FEATURE_MULTI_RECONNECT, &session->s_features)) { |
121f22a1 | 3640 | recon_state.msg_version = 3; |
81c5a148 YZ |
3641 | recon_state.allow_multi = true; |
3642 | } else if (session->s_con.peer_features & CEPH_FEATURE_MDSENC) { | |
3643 | recon_state.msg_version = 3; | |
3644 | } else { | |
23c625ce | 3645 | recon_state.msg_version = 2; |
81c5a148 YZ |
3646 | } |
3647 | /* trsaverse this session's caps */ | |
f5d77269 | 3648 | err = ceph_iterate_session_caps(session, encode_caps_cb, &recon_state); |
2f2dc053 | 3649 | |
99a9c273 YZ |
3650 | spin_lock(&session->s_cap_lock); |
3651 | session->s_cap_reconnect = 0; | |
3652 | spin_unlock(&session->s_cap_lock); | |
3653 | ||
81c5a148 YZ |
3654 | if (err < 0) |
3655 | goto fail; | |
2f2dc053 | 3656 | |
81c5a148 YZ |
3657 | /* check if all realms can be encoded into current message */ |
3658 | if (mdsc->num_snap_realms) { | |
3659 | size_t total_len = | |
3660 | recon_state.pagelist->length + | |
3661 | mdsc->num_snap_realms * | |
3662 | sizeof(struct ceph_mds_snaprealm_reconnect); | |
3663 | if (recon_state.msg_version >= 4) { | |
3664 | /* number of realms */ | |
3665 | total_len += sizeof(u32); | |
3666 | /* version, compat_version and struct_len */ | |
3667 | total_len += mdsc->num_snap_realms * | |
3668 | (2 * sizeof(u8) + sizeof(u32)); | |
3669 | } | |
3670 | if (total_len > RECONNECT_MAX_SIZE) { | |
3671 | if (!recon_state.allow_multi) { | |
3672 | err = -ENOSPC; | |
3673 | goto fail; | |
3674 | } | |
3675 | if (recon_state.nr_caps) { | |
3676 | err = send_reconnect_partial(&recon_state); | |
3677 | if (err) | |
3678 | goto fail; | |
3679 | } | |
3680 | recon_state.msg_version = 5; | |
3681 | } | |
2f2dc053 | 3682 | } |
2f2dc053 | 3683 | |
81c5a148 YZ |
3684 | err = encode_snap_realms(mdsc, &recon_state); |
3685 | if (err < 0) | |
3686 | goto fail; | |
3687 | ||
3688 | if (recon_state.msg_version >= 5) { | |
3689 | err = ceph_pagelist_encode_8(recon_state.pagelist, 0); | |
3690 | if (err < 0) | |
3691 | goto fail; | |
3692 | } | |
44c99757 | 3693 | |
81c5a148 YZ |
3694 | if (recon_state.nr_caps || recon_state.nr_realms) { |
3695 | struct page *page = | |
3696 | list_first_entry(&recon_state.pagelist->head, | |
3697 | struct page, lru); | |
44c99757 | 3698 | __le32 *addr = kmap_atomic(page); |
81c5a148 YZ |
3699 | if (recon_state.nr_caps) { |
3700 | WARN_ON(recon_state.nr_realms != mdsc->num_snap_realms); | |
3701 | *addr = cpu_to_le32(recon_state.nr_caps); | |
3702 | } else if (recon_state.msg_version >= 4) { | |
3703 | *(addr + 1) = cpu_to_le32(recon_state.nr_realms); | |
3704 | } | |
44c99757 | 3705 | kunmap_atomic(addr); |
ebf18f47 | 3706 | } |
44c99757 | 3707 | |
81c5a148 YZ |
3708 | reply->hdr.version = cpu_to_le16(recon_state.msg_version); |
3709 | if (recon_state.msg_version >= 4) | |
3710 | reply->hdr.compat_version = cpu_to_le16(4); | |
e548e9b9 | 3711 | |
81c5a148 YZ |
3712 | reply->hdr.data_len = cpu_to_le32(recon_state.pagelist->length); |
3713 | ceph_msg_data_add_pagelist(reply, recon_state.pagelist); | |
e548e9b9 | 3714 | |
2f2dc053 SW |
3715 | ceph_con_send(&session->s_con, reply); |
3716 | ||
9abf82b8 SW |
3717 | mutex_unlock(&session->s_mutex); |
3718 | ||
3719 | mutex_lock(&mdsc->mutex); | |
3720 | __wake_requests(mdsc, &session->s_waiting); | |
3721 | mutex_unlock(&mdsc->mutex); | |
3722 | ||
2f2dc053 | 3723 | up_read(&mdsc->snap_rwsem); |
81c5a148 | 3724 | ceph_pagelist_release(recon_state.pagelist); |
2f2dc053 SW |
3725 | return; |
3726 | ||
93cea5be | 3727 | fail: |
2f2dc053 | 3728 | ceph_msg_put(reply); |
9abf82b8 SW |
3729 | up_read(&mdsc->snap_rwsem); |
3730 | mutex_unlock(&session->s_mutex); | |
93cea5be | 3731 | fail_nomsg: |
81c5a148 | 3732 | ceph_pagelist_release(recon_state.pagelist); |
93cea5be | 3733 | fail_nopagelist: |
9abf82b8 | 3734 | pr_err("error %d preparing reconnect for mds%d\n", err, mds); |
9abf82b8 | 3735 | return; |
2f2dc053 SW |
3736 | } |
3737 | ||
3738 | ||
3739 | /* | |
3740 | * compare old and new mdsmaps, kicking requests | |
3741 | * and closing out old connections as necessary | |
3742 | * | |
3743 | * called under mdsc->mutex. | |
3744 | */ | |
3745 | static void check_new_map(struct ceph_mds_client *mdsc, | |
3746 | struct ceph_mdsmap *newmap, | |
3747 | struct ceph_mdsmap *oldmap) | |
3748 | { | |
3749 | int i; | |
3750 | int oldstate, newstate; | |
3751 | struct ceph_mds_session *s; | |
3752 | ||
3753 | dout("check_new_map new %u old %u\n", | |
3754 | newmap->m_epoch, oldmap->m_epoch); | |
3755 | ||
76201b63 | 3756 | for (i = 0; i < oldmap->m_num_mds && i < mdsc->max_sessions; i++) { |
d37b1d99 | 3757 | if (!mdsc->sessions[i]) |
2f2dc053 SW |
3758 | continue; |
3759 | s = mdsc->sessions[i]; | |
3760 | oldstate = ceph_mdsmap_get_state(oldmap, i); | |
3761 | newstate = ceph_mdsmap_get_state(newmap, i); | |
3762 | ||
0deb01c9 | 3763 | dout("check_new_map mds%d state %s%s -> %s%s (session %s)\n", |
2f2dc053 | 3764 | i, ceph_mds_state_name(oldstate), |
0deb01c9 | 3765 | ceph_mdsmap_is_laggy(oldmap, i) ? " (laggy)" : "", |
2f2dc053 | 3766 | ceph_mds_state_name(newstate), |
0deb01c9 | 3767 | ceph_mdsmap_is_laggy(newmap, i) ? " (laggy)" : "", |
a687ecaf | 3768 | ceph_session_state_name(s->s_state)); |
2f2dc053 | 3769 | |
6f0f597b YZ |
3770 | if (i >= newmap->m_num_mds) { |
3771 | /* force close session for stopped mds */ | |
3772 | get_session(s); | |
3773 | __unregister_session(mdsc, s); | |
3774 | __wake_requests(mdsc, &s->s_waiting); | |
3775 | mutex_unlock(&mdsc->mutex); | |
2827528d | 3776 | |
6f0f597b YZ |
3777 | mutex_lock(&s->s_mutex); |
3778 | cleanup_session_requests(mdsc, s); | |
3779 | remove_session_caps(s); | |
3780 | mutex_unlock(&s->s_mutex); | |
2827528d | 3781 | |
6f0f597b | 3782 | ceph_put_mds_session(s); |
2827528d | 3783 | |
6f0f597b YZ |
3784 | mutex_lock(&mdsc->mutex); |
3785 | kick_requests(mdsc, i); | |
3786 | continue; | |
3787 | } | |
3788 | ||
3789 | if (memcmp(ceph_mdsmap_get_addr(oldmap, i), | |
3790 | ceph_mdsmap_get_addr(newmap, i), | |
3791 | sizeof(struct ceph_entity_addr))) { | |
3792 | /* just close it */ | |
3793 | mutex_unlock(&mdsc->mutex); | |
3794 | mutex_lock(&s->s_mutex); | |
3795 | mutex_lock(&mdsc->mutex); | |
3796 | ceph_con_close(&s->s_con); | |
3797 | mutex_unlock(&s->s_mutex); | |
3798 | s->s_state = CEPH_MDS_SESSION_RESTARTING; | |
2f2dc053 SW |
3799 | } else if (oldstate == newstate) { |
3800 | continue; /* nothing new with this mds */ | |
3801 | } | |
3802 | ||
3803 | /* | |
3804 | * send reconnect? | |
3805 | */ | |
3806 | if (s->s_state == CEPH_MDS_SESSION_RESTARTING && | |
34b6c855 SW |
3807 | newstate >= CEPH_MDS_STATE_RECONNECT) { |
3808 | mutex_unlock(&mdsc->mutex); | |
3809 | send_mds_reconnect(mdsc, s); | |
3810 | mutex_lock(&mdsc->mutex); | |
3811 | } | |
2f2dc053 SW |
3812 | |
3813 | /* | |
29790f26 | 3814 | * kick request on any mds that has gone active. |
2f2dc053 SW |
3815 | */ |
3816 | if (oldstate < CEPH_MDS_STATE_ACTIVE && | |
3817 | newstate >= CEPH_MDS_STATE_ACTIVE) { | |
29790f26 SW |
3818 | if (oldstate != CEPH_MDS_STATE_CREATING && |
3819 | oldstate != CEPH_MDS_STATE_STARTING) | |
3820 | pr_info("mds%d recovery completed\n", s->s_mds); | |
3821 | kick_requests(mdsc, i); | |
2f2dc053 | 3822 | ceph_kick_flushing_caps(mdsc, s); |
d2f8bb27 | 3823 | wake_up_session_caps(s, RECONNECT); |
2f2dc053 SW |
3824 | } |
3825 | } | |
cb170a22 | 3826 | |
76201b63 | 3827 | for (i = 0; i < newmap->m_num_mds && i < mdsc->max_sessions; i++) { |
cb170a22 SW |
3828 | s = mdsc->sessions[i]; |
3829 | if (!s) | |
3830 | continue; | |
3831 | if (!ceph_mdsmap_is_laggy(newmap, i)) | |
3832 | continue; | |
3833 | if (s->s_state == CEPH_MDS_SESSION_OPEN || | |
3834 | s->s_state == CEPH_MDS_SESSION_HUNG || | |
3835 | s->s_state == CEPH_MDS_SESSION_CLOSING) { | |
3836 | dout(" connecting to export targets of laggy mds%d\n", | |
3837 | i); | |
3838 | __open_export_target_sessions(mdsc, s); | |
3839 | } | |
3840 | } | |
2f2dc053 SW |
3841 | } |
3842 | ||
3843 | ||
3844 | ||
3845 | /* | |
3846 | * leases | |
3847 | */ | |
3848 | ||
3849 | /* | |
3850 | * caller must hold session s_mutex, dentry->d_lock | |
3851 | */ | |
3852 | void __ceph_mdsc_drop_dentry_lease(struct dentry *dentry) | |
3853 | { | |
3854 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
3855 | ||
3856 | ceph_put_mds_session(di->lease_session); | |
3857 | di->lease_session = NULL; | |
3858 | } | |
3859 | ||
2600d2dd SW |
3860 | static void handle_lease(struct ceph_mds_client *mdsc, |
3861 | struct ceph_mds_session *session, | |
3862 | struct ceph_msg *msg) | |
2f2dc053 | 3863 | { |
3d14c5d2 | 3864 | struct super_block *sb = mdsc->fsc->sb; |
2f2dc053 | 3865 | struct inode *inode; |
2f2dc053 SW |
3866 | struct dentry *parent, *dentry; |
3867 | struct ceph_dentry_info *di; | |
2600d2dd | 3868 | int mds = session->s_mds; |
2f2dc053 | 3869 | struct ceph_mds_lease *h = msg->front.iov_base; |
1e5ea23d | 3870 | u32 seq; |
2f2dc053 | 3871 | struct ceph_vino vino; |
2f2dc053 SW |
3872 | struct qstr dname; |
3873 | int release = 0; | |
3874 | ||
2f2dc053 SW |
3875 | dout("handle_lease from mds%d\n", mds); |
3876 | ||
3877 | /* decode */ | |
3878 | if (msg->front.iov_len < sizeof(*h) + sizeof(u32)) | |
3879 | goto bad; | |
3880 | vino.ino = le64_to_cpu(h->ino); | |
3881 | vino.snap = CEPH_NOSNAP; | |
1e5ea23d | 3882 | seq = le32_to_cpu(h->seq); |
0fcf6c02 YZ |
3883 | dname.len = get_unaligned_le32(h + 1); |
3884 | if (msg->front.iov_len < sizeof(*h) + sizeof(u32) + dname.len) | |
2f2dc053 | 3885 | goto bad; |
0fcf6c02 | 3886 | dname.name = (void *)(h + 1) + sizeof(u32); |
2f2dc053 | 3887 | |
2f2dc053 SW |
3888 | /* lookup inode */ |
3889 | inode = ceph_find_inode(sb, vino); | |
2f90b852 SW |
3890 | dout("handle_lease %s, ino %llx %p %.*s\n", |
3891 | ceph_lease_op_name(h->action), vino.ino, inode, | |
1e5ea23d | 3892 | dname.len, dname.name); |
6cd3bcad YZ |
3893 | |
3894 | mutex_lock(&session->s_mutex); | |
3895 | session->s_seq++; | |
3896 | ||
d37b1d99 | 3897 | if (!inode) { |
2f2dc053 SW |
3898 | dout("handle_lease no inode %llx\n", vino.ino); |
3899 | goto release; | |
3900 | } | |
2f2dc053 SW |
3901 | |
3902 | /* dentry */ | |
3903 | parent = d_find_alias(inode); | |
3904 | if (!parent) { | |
3905 | dout("no parent dentry on inode %p\n", inode); | |
3906 | WARN_ON(1); | |
3907 | goto release; /* hrm... */ | |
3908 | } | |
8387ff25 | 3909 | dname.hash = full_name_hash(parent, dname.name, dname.len); |
2f2dc053 SW |
3910 | dentry = d_lookup(parent, &dname); |
3911 | dput(parent); | |
3912 | if (!dentry) | |
3913 | goto release; | |
3914 | ||
3915 | spin_lock(&dentry->d_lock); | |
3916 | di = ceph_dentry(dentry); | |
3917 | switch (h->action) { | |
3918 | case CEPH_MDS_LEASE_REVOKE: | |
3d8eb7a9 | 3919 | if (di->lease_session == session) { |
1e5ea23d SW |
3920 | if (ceph_seq_cmp(di->lease_seq, seq) > 0) |
3921 | h->seq = cpu_to_le32(di->lease_seq); | |
2f2dc053 SW |
3922 | __ceph_mdsc_drop_dentry_lease(dentry); |
3923 | } | |
3924 | release = 1; | |
3925 | break; | |
3926 | ||
3927 | case CEPH_MDS_LEASE_RENEW: | |
3d8eb7a9 | 3928 | if (di->lease_session == session && |
2f2dc053 SW |
3929 | di->lease_gen == session->s_cap_gen && |
3930 | di->lease_renew_from && | |
3931 | di->lease_renew_after == 0) { | |
3932 | unsigned long duration = | |
3563dbdd | 3933 | msecs_to_jiffies(le32_to_cpu(h->duration_ms)); |
2f2dc053 | 3934 | |
1e5ea23d | 3935 | di->lease_seq = seq; |
9b16f03c | 3936 | di->time = di->lease_renew_from + duration; |
2f2dc053 SW |
3937 | di->lease_renew_after = di->lease_renew_from + |
3938 | (duration >> 1); | |
3939 | di->lease_renew_from = 0; | |
3940 | } | |
3941 | break; | |
3942 | } | |
3943 | spin_unlock(&dentry->d_lock); | |
3944 | dput(dentry); | |
3945 | ||
3946 | if (!release) | |
3947 | goto out; | |
3948 | ||
3949 | release: | |
3950 | /* let's just reuse the same message */ | |
3951 | h->action = CEPH_MDS_LEASE_REVOKE_ACK; | |
3952 | ceph_msg_get(msg); | |
3953 | ceph_con_send(&session->s_con, msg); | |
3954 | ||
3955 | out: | |
2f2dc053 | 3956 | mutex_unlock(&session->s_mutex); |
3e1d0452 YZ |
3957 | /* avoid calling iput_final() in mds dispatch threads */ |
3958 | ceph_async_iput(inode); | |
2f2dc053 SW |
3959 | return; |
3960 | ||
3961 | bad: | |
3962 | pr_err("corrupt lease message\n"); | |
9ec7cab1 | 3963 | ceph_msg_dump(msg); |
2f2dc053 SW |
3964 | } |
3965 | ||
3966 | void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session, | |
2f2dc053 SW |
3967 | struct dentry *dentry, char action, |
3968 | u32 seq) | |
3969 | { | |
3970 | struct ceph_msg *msg; | |
3971 | struct ceph_mds_lease *lease; | |
8f2a98ef YZ |
3972 | struct inode *dir; |
3973 | int len = sizeof(*lease) + sizeof(u32) + NAME_MAX; | |
2f2dc053 | 3974 | |
8f2a98ef YZ |
3975 | dout("lease_send_msg identry %p %s to mds%d\n", |
3976 | dentry, ceph_lease_op_name(action), session->s_mds); | |
2f2dc053 | 3977 | |
b61c2763 | 3978 | msg = ceph_msg_new(CEPH_MSG_CLIENT_LEASE, len, GFP_NOFS, false); |
a79832f2 | 3979 | if (!msg) |
2f2dc053 SW |
3980 | return; |
3981 | lease = msg->front.iov_base; | |
3982 | lease->action = action; | |
2f2dc053 | 3983 | lease->seq = cpu_to_le32(seq); |
2f2dc053 | 3984 | |
8f2a98ef YZ |
3985 | spin_lock(&dentry->d_lock); |
3986 | dir = d_inode(dentry->d_parent); | |
3987 | lease->ino = cpu_to_le64(ceph_ino(dir)); | |
3988 | lease->first = lease->last = cpu_to_le64(ceph_snap(dir)); | |
3989 | ||
3990 | put_unaligned_le32(dentry->d_name.len, lease + 1); | |
3991 | memcpy((void *)(lease + 1) + 4, | |
3992 | dentry->d_name.name, dentry->d_name.len); | |
3993 | spin_unlock(&dentry->d_lock); | |
2f2dc053 SW |
3994 | /* |
3995 | * if this is a preemptive lease RELEASE, no need to | |
3996 | * flush request stream, since the actual request will | |
3997 | * soon follow. | |
3998 | */ | |
3999 | msg->more_to_follow = (action == CEPH_MDS_LEASE_RELEASE); | |
4000 | ||
4001 | ceph_con_send(&session->s_con, msg); | |
4002 | } | |
4003 | ||
2f2dc053 | 4004 | /* |
7aac453a | 4005 | * lock unlock sessions, to wait ongoing session activities |
2f2dc053 | 4006 | */ |
7aac453a | 4007 | static void lock_unlock_sessions(struct ceph_mds_client *mdsc) |
2f2dc053 SW |
4008 | { |
4009 | int i; | |
4010 | ||
2f2dc053 SW |
4011 | mutex_lock(&mdsc->mutex); |
4012 | for (i = 0; i < mdsc->max_sessions; i++) { | |
4013 | struct ceph_mds_session *s = __ceph_lookup_mds_session(mdsc, i); | |
4014 | if (!s) | |
4015 | continue; | |
4016 | mutex_unlock(&mdsc->mutex); | |
4017 | mutex_lock(&s->s_mutex); | |
4018 | mutex_unlock(&s->s_mutex); | |
4019 | ceph_put_mds_session(s); | |
4020 | mutex_lock(&mdsc->mutex); | |
4021 | } | |
4022 | mutex_unlock(&mdsc->mutex); | |
4023 | } | |
4024 | ||
131d7eb4 YZ |
4025 | static void maybe_recover_session(struct ceph_mds_client *mdsc) |
4026 | { | |
4027 | struct ceph_fs_client *fsc = mdsc->fsc; | |
4028 | ||
4029 | if (!ceph_test_mount_opt(fsc, CLEANRECOVER)) | |
4030 | return; | |
2f2dc053 | 4031 | |
131d7eb4 YZ |
4032 | if (READ_ONCE(fsc->mount_state) != CEPH_MOUNT_MOUNTED) |
4033 | return; | |
4034 | ||
4035 | if (!READ_ONCE(fsc->blacklisted)) | |
4036 | return; | |
4037 | ||
4038 | if (fsc->last_auto_reconnect && | |
4039 | time_before(jiffies, fsc->last_auto_reconnect + HZ * 60 * 30)) | |
4040 | return; | |
4041 | ||
4042 | pr_info("auto reconnect after blacklisted\n"); | |
4043 | fsc->last_auto_reconnect = jiffies; | |
4044 | ceph_force_reconnect(fsc->sb); | |
4045 | } | |
2f2dc053 SW |
4046 | |
4047 | /* | |
4048 | * delayed work -- periodically trim expired leases, renew caps with mds | |
4049 | */ | |
4050 | static void schedule_delayed(struct ceph_mds_client *mdsc) | |
4051 | { | |
4052 | int delay = 5; | |
4053 | unsigned hz = round_jiffies_relative(HZ * delay); | |
4054 | schedule_delayed_work(&mdsc->delayed_work, hz); | |
4055 | } | |
4056 | ||
4057 | static void delayed_work(struct work_struct *work) | |
4058 | { | |
4059 | int i; | |
4060 | struct ceph_mds_client *mdsc = | |
4061 | container_of(work, struct ceph_mds_client, delayed_work.work); | |
4062 | int renew_interval; | |
4063 | int renew_caps; | |
4064 | ||
4065 | dout("mdsc delayed_work\n"); | |
75c9627e | 4066 | |
2f2dc053 SW |
4067 | mutex_lock(&mdsc->mutex); |
4068 | renew_interval = mdsc->mdsmap->m_session_timeout >> 2; | |
4069 | renew_caps = time_after_eq(jiffies, HZ*renew_interval + | |
4070 | mdsc->last_renew_caps); | |
4071 | if (renew_caps) | |
4072 | mdsc->last_renew_caps = jiffies; | |
4073 | ||
4074 | for (i = 0; i < mdsc->max_sessions; i++) { | |
4075 | struct ceph_mds_session *s = __ceph_lookup_mds_session(mdsc, i); | |
d37b1d99 | 4076 | if (!s) |
2f2dc053 SW |
4077 | continue; |
4078 | if (s->s_state == CEPH_MDS_SESSION_CLOSING) { | |
4079 | dout("resending session close request for mds%d\n", | |
4080 | s->s_mds); | |
4081 | request_close_session(mdsc, s); | |
4082 | ceph_put_mds_session(s); | |
4083 | continue; | |
4084 | } | |
4085 | if (s->s_ttl && time_after(jiffies, s->s_ttl)) { | |
4086 | if (s->s_state == CEPH_MDS_SESSION_OPEN) { | |
4087 | s->s_state = CEPH_MDS_SESSION_HUNG; | |
4088 | pr_info("mds%d hung\n", s->s_mds); | |
4089 | } | |
4090 | } | |
71a228bc EC |
4091 | if (s->s_state == CEPH_MDS_SESSION_NEW || |
4092 | s->s_state == CEPH_MDS_SESSION_RESTARTING || | |
4093 | s->s_state == CEPH_MDS_SESSION_REJECTED) { | |
2f2dc053 SW |
4094 | /* this mds is failed or recovering, just wait */ |
4095 | ceph_put_mds_session(s); | |
4096 | continue; | |
4097 | } | |
4098 | mutex_unlock(&mdsc->mutex); | |
4099 | ||
4100 | mutex_lock(&s->s_mutex); | |
4101 | if (renew_caps) | |
4102 | send_renew_caps(mdsc, s); | |
4103 | else | |
4104 | ceph_con_keepalive(&s->s_con); | |
aab53dd9 SW |
4105 | if (s->s_state == CEPH_MDS_SESSION_OPEN || |
4106 | s->s_state == CEPH_MDS_SESSION_HUNG) | |
3d7ded4d | 4107 | ceph_send_cap_releases(mdsc, s); |
2f2dc053 SW |
4108 | mutex_unlock(&s->s_mutex); |
4109 | ceph_put_mds_session(s); | |
4110 | ||
4111 | mutex_lock(&mdsc->mutex); | |
4112 | } | |
4113 | mutex_unlock(&mdsc->mutex); | |
4114 | ||
37c4efc1 YZ |
4115 | ceph_check_delayed_caps(mdsc); |
4116 | ||
4117 | ceph_queue_cap_reclaim_work(mdsc); | |
4118 | ||
4119 | ceph_trim_snapid_map(mdsc); | |
4120 | ||
131d7eb4 YZ |
4121 | maybe_recover_session(mdsc); |
4122 | ||
2f2dc053 SW |
4123 | schedule_delayed(mdsc); |
4124 | } | |
4125 | ||
3d14c5d2 | 4126 | int ceph_mdsc_init(struct ceph_fs_client *fsc) |
2f2dc053 | 4127 | |
2f2dc053 | 4128 | { |
3d14c5d2 YS |
4129 | struct ceph_mds_client *mdsc; |
4130 | ||
4131 | mdsc = kzalloc(sizeof(struct ceph_mds_client), GFP_NOFS); | |
4132 | if (!mdsc) | |
4133 | return -ENOMEM; | |
4134 | mdsc->fsc = fsc; | |
2f2dc053 SW |
4135 | mutex_init(&mdsc->mutex); |
4136 | mdsc->mdsmap = kzalloc(sizeof(*mdsc->mdsmap), GFP_NOFS); | |
d37b1d99 | 4137 | if (!mdsc->mdsmap) { |
fb3101b6 | 4138 | kfree(mdsc); |
2d06eeb8 | 4139 | return -ENOMEM; |
fb3101b6 | 4140 | } |
2d06eeb8 | 4141 | |
50c55aec | 4142 | fsc->mdsc = mdsc; |
2f2dc053 | 4143 | init_completion(&mdsc->safe_umount_waiters); |
f3c60c59 | 4144 | init_waitqueue_head(&mdsc->session_close_wq); |
2f2dc053 SW |
4145 | INIT_LIST_HEAD(&mdsc->waiting_for_map); |
4146 | mdsc->sessions = NULL; | |
86d8f67b | 4147 | atomic_set(&mdsc->num_sessions, 0); |
2f2dc053 SW |
4148 | mdsc->max_sessions = 0; |
4149 | mdsc->stopping = 0; | |
d557c48d | 4150 | atomic64_set(&mdsc->quotarealms_count, 0); |
0c44a8e0 LH |
4151 | mdsc->quotarealms_inodes = RB_ROOT; |
4152 | mutex_init(&mdsc->quotarealms_inodes_mutex); | |
affbc19a | 4153 | mdsc->last_snap_seq = 0; |
2f2dc053 | 4154 | init_rwsem(&mdsc->snap_rwsem); |
a105f00c | 4155 | mdsc->snap_realms = RB_ROOT; |
2f2dc053 | 4156 | INIT_LIST_HEAD(&mdsc->snap_empty); |
81c5a148 | 4157 | mdsc->num_snap_realms = 0; |
2f2dc053 SW |
4158 | spin_lock_init(&mdsc->snap_empty_lock); |
4159 | mdsc->last_tid = 0; | |
e8a7b8b1 | 4160 | mdsc->oldest_tid = 0; |
44ca18f2 | 4161 | mdsc->request_tree = RB_ROOT; |
2f2dc053 SW |
4162 | INIT_DELAYED_WORK(&mdsc->delayed_work, delayed_work); |
4163 | mdsc->last_renew_caps = jiffies; | |
4164 | INIT_LIST_HEAD(&mdsc->cap_delay_list); | |
4165 | spin_lock_init(&mdsc->cap_delay_lock); | |
4166 | INIT_LIST_HEAD(&mdsc->snap_flush_list); | |
4167 | spin_lock_init(&mdsc->snap_flush_lock); | |
553adfd9 | 4168 | mdsc->last_cap_flush_tid = 1; |
e4500b5e | 4169 | INIT_LIST_HEAD(&mdsc->cap_flush_list); |
2f2dc053 | 4170 | INIT_LIST_HEAD(&mdsc->cap_dirty); |
db354052 | 4171 | INIT_LIST_HEAD(&mdsc->cap_dirty_migrating); |
2f2dc053 SW |
4172 | mdsc->num_cap_flushing = 0; |
4173 | spin_lock_init(&mdsc->cap_dirty_lock); | |
4174 | init_waitqueue_head(&mdsc->cap_flushing_wq); | |
37c4efc1 | 4175 | INIT_WORK(&mdsc->cap_reclaim_work, ceph_cap_reclaim_work); |
fe33032d | 4176 | atomic_set(&mdsc->cap_reclaim_pending, 0); |
37c4efc1 YZ |
4177 | |
4178 | spin_lock_init(&mdsc->dentry_list_lock); | |
4179 | INIT_LIST_HEAD(&mdsc->dentry_leases); | |
4180 | INIT_LIST_HEAD(&mdsc->dentry_dir_leases); | |
2d06eeb8 | 4181 | |
37151668 | 4182 | ceph_caps_init(mdsc); |
fe33032d | 4183 | ceph_adjust_caps_max_min(mdsc, fsc->mount_options); |
37151668 | 4184 | |
75c9627e YZ |
4185 | spin_lock_init(&mdsc->snapid_map_lock); |
4186 | mdsc->snapid_map_tree = RB_ROOT; | |
4187 | INIT_LIST_HEAD(&mdsc->snapid_map_lru); | |
4188 | ||
10183a69 YZ |
4189 | init_rwsem(&mdsc->pool_perm_rwsem); |
4190 | mdsc->pool_perm_tree = RB_ROOT; | |
4191 | ||
dfeb84d4 YZ |
4192 | strscpy(mdsc->nodename, utsname()->nodename, |
4193 | sizeof(mdsc->nodename)); | |
5f44f142 | 4194 | return 0; |
2f2dc053 SW |
4195 | } |
4196 | ||
4197 | /* | |
4198 | * Wait for safe replies on open mds requests. If we time out, drop | |
4199 | * all requests from the tree to avoid dangling dentry refs. | |
4200 | */ | |
4201 | static void wait_requests(struct ceph_mds_client *mdsc) | |
4202 | { | |
a319bf56 | 4203 | struct ceph_options *opts = mdsc->fsc->client->options; |
2f2dc053 | 4204 | struct ceph_mds_request *req; |
2f2dc053 SW |
4205 | |
4206 | mutex_lock(&mdsc->mutex); | |
44ca18f2 | 4207 | if (__get_oldest_req(mdsc)) { |
2f2dc053 | 4208 | mutex_unlock(&mdsc->mutex); |
44ca18f2 | 4209 | |
2f2dc053 SW |
4210 | dout("wait_requests waiting for requests\n"); |
4211 | wait_for_completion_timeout(&mdsc->safe_umount_waiters, | |
a319bf56 | 4212 | ceph_timeout_jiffies(opts->mount_timeout)); |
2f2dc053 SW |
4213 | |
4214 | /* tear down remaining requests */ | |
44ca18f2 SW |
4215 | mutex_lock(&mdsc->mutex); |
4216 | while ((req = __get_oldest_req(mdsc))) { | |
2f2dc053 SW |
4217 | dout("wait_requests timed out on tid %llu\n", |
4218 | req->r_tid); | |
428138c9 | 4219 | list_del_init(&req->r_wait); |
44ca18f2 | 4220 | __unregister_request(mdsc, req); |
2f2dc053 SW |
4221 | } |
4222 | } | |
4223 | mutex_unlock(&mdsc->mutex); | |
4224 | dout("wait_requests done\n"); | |
4225 | } | |
4226 | ||
4227 | /* | |
4228 | * called before mount is ro, and before dentries are torn down. | |
4229 | * (hmm, does this still race with new lookups?) | |
4230 | */ | |
4231 | void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc) | |
4232 | { | |
4233 | dout("pre_umount\n"); | |
4234 | mdsc->stopping = 1; | |
4235 | ||
7aac453a | 4236 | lock_unlock_sessions(mdsc); |
afcdaea3 | 4237 | ceph_flush_dirty_caps(mdsc); |
2f2dc053 | 4238 | wait_requests(mdsc); |
17c688c3 SW |
4239 | |
4240 | /* | |
4241 | * wait for reply handlers to drop their request refs and | |
4242 | * their inode/dcache refs | |
4243 | */ | |
4244 | ceph_msgr_flush(); | |
0c44a8e0 LH |
4245 | |
4246 | ceph_cleanup_quotarealms_inodes(mdsc); | |
2f2dc053 SW |
4247 | } |
4248 | ||
4249 | /* | |
4250 | * wait for all write mds requests to flush. | |
4251 | */ | |
4252 | static void wait_unsafe_requests(struct ceph_mds_client *mdsc, u64 want_tid) | |
4253 | { | |
80fc7314 | 4254 | struct ceph_mds_request *req = NULL, *nextreq; |
44ca18f2 | 4255 | struct rb_node *n; |
2f2dc053 SW |
4256 | |
4257 | mutex_lock(&mdsc->mutex); | |
4258 | dout("wait_unsafe_requests want %lld\n", want_tid); | |
80fc7314 | 4259 | restart: |
44ca18f2 SW |
4260 | req = __get_oldest_req(mdsc); |
4261 | while (req && req->r_tid <= want_tid) { | |
80fc7314 SW |
4262 | /* find next request */ |
4263 | n = rb_next(&req->r_node); | |
4264 | if (n) | |
4265 | nextreq = rb_entry(n, struct ceph_mds_request, r_node); | |
4266 | else | |
4267 | nextreq = NULL; | |
e8a7b8b1 YZ |
4268 | if (req->r_op != CEPH_MDS_OP_SETFILELOCK && |
4269 | (req->r_op & CEPH_MDS_OP_WRITE)) { | |
44ca18f2 SW |
4270 | /* write op */ |
4271 | ceph_mdsc_get_request(req); | |
80fc7314 SW |
4272 | if (nextreq) |
4273 | ceph_mdsc_get_request(nextreq); | |
44ca18f2 SW |
4274 | mutex_unlock(&mdsc->mutex); |
4275 | dout("wait_unsafe_requests wait on %llu (want %llu)\n", | |
4276 | req->r_tid, want_tid); | |
4277 | wait_for_completion(&req->r_safe_completion); | |
4278 | mutex_lock(&mdsc->mutex); | |
44ca18f2 | 4279 | ceph_mdsc_put_request(req); |
80fc7314 SW |
4280 | if (!nextreq) |
4281 | break; /* next dne before, so we're done! */ | |
4282 | if (RB_EMPTY_NODE(&nextreq->r_node)) { | |
4283 | /* next request was removed from tree */ | |
4284 | ceph_mdsc_put_request(nextreq); | |
4285 | goto restart; | |
4286 | } | |
4287 | ceph_mdsc_put_request(nextreq); /* won't go away */ | |
44ca18f2 | 4288 | } |
80fc7314 | 4289 | req = nextreq; |
2f2dc053 SW |
4290 | } |
4291 | mutex_unlock(&mdsc->mutex); | |
4292 | dout("wait_unsafe_requests done\n"); | |
4293 | } | |
4294 | ||
4295 | void ceph_mdsc_sync(struct ceph_mds_client *mdsc) | |
4296 | { | |
0e294387 | 4297 | u64 want_tid, want_flush; |
2f2dc053 | 4298 | |
52953d55 | 4299 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) |
56b7cf95 SW |
4300 | return; |
4301 | ||
2f2dc053 SW |
4302 | dout("sync\n"); |
4303 | mutex_lock(&mdsc->mutex); | |
4304 | want_tid = mdsc->last_tid; | |
2f2dc053 | 4305 | mutex_unlock(&mdsc->mutex); |
2f2dc053 | 4306 | |
afcdaea3 | 4307 | ceph_flush_dirty_caps(mdsc); |
d3383a8e | 4308 | spin_lock(&mdsc->cap_dirty_lock); |
8310b089 | 4309 | want_flush = mdsc->last_cap_flush_tid; |
c8799fc4 YZ |
4310 | if (!list_empty(&mdsc->cap_flush_list)) { |
4311 | struct ceph_cap_flush *cf = | |
4312 | list_last_entry(&mdsc->cap_flush_list, | |
4313 | struct ceph_cap_flush, g_list); | |
4314 | cf->wake = true; | |
4315 | } | |
d3383a8e YZ |
4316 | spin_unlock(&mdsc->cap_dirty_lock); |
4317 | ||
0e294387 YZ |
4318 | dout("sync want tid %lld flush_seq %lld\n", |
4319 | want_tid, want_flush); | |
2f2dc053 SW |
4320 | |
4321 | wait_unsafe_requests(mdsc, want_tid); | |
0e294387 | 4322 | wait_caps_flush(mdsc, want_flush); |
2f2dc053 SW |
4323 | } |
4324 | ||
f3c60c59 SW |
4325 | /* |
4326 | * true if all sessions are closed, or we force unmount | |
4327 | */ | |
fcff415c | 4328 | static bool done_closing_sessions(struct ceph_mds_client *mdsc, int skipped) |
f3c60c59 | 4329 | { |
52953d55 | 4330 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) |
f3c60c59 | 4331 | return true; |
fcff415c | 4332 | return atomic_read(&mdsc->num_sessions) <= skipped; |
f3c60c59 | 4333 | } |
2f2dc053 SW |
4334 | |
4335 | /* | |
4336 | * called after sb is ro. | |
4337 | */ | |
4338 | void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc) | |
4339 | { | |
a319bf56 | 4340 | struct ceph_options *opts = mdsc->fsc->client->options; |
2f2dc053 SW |
4341 | struct ceph_mds_session *session; |
4342 | int i; | |
fcff415c | 4343 | int skipped = 0; |
2f2dc053 SW |
4344 | |
4345 | dout("close_sessions\n"); | |
4346 | ||
2f2dc053 | 4347 | /* close sessions */ |
f3c60c59 SW |
4348 | mutex_lock(&mdsc->mutex); |
4349 | for (i = 0; i < mdsc->max_sessions; i++) { | |
4350 | session = __ceph_lookup_mds_session(mdsc, i); | |
4351 | if (!session) | |
4352 | continue; | |
2f2dc053 | 4353 | mutex_unlock(&mdsc->mutex); |
f3c60c59 | 4354 | mutex_lock(&session->s_mutex); |
fcff415c YZ |
4355 | if (__close_session(mdsc, session) <= 0) |
4356 | skipped++; | |
f3c60c59 SW |
4357 | mutex_unlock(&session->s_mutex); |
4358 | ceph_put_mds_session(session); | |
2f2dc053 SW |
4359 | mutex_lock(&mdsc->mutex); |
4360 | } | |
f3c60c59 SW |
4361 | mutex_unlock(&mdsc->mutex); |
4362 | ||
4363 | dout("waiting for sessions to close\n"); | |
fcff415c YZ |
4364 | wait_event_timeout(mdsc->session_close_wq, |
4365 | done_closing_sessions(mdsc, skipped), | |
a319bf56 | 4366 | ceph_timeout_jiffies(opts->mount_timeout)); |
2f2dc053 SW |
4367 | |
4368 | /* tear down remaining sessions */ | |
f3c60c59 | 4369 | mutex_lock(&mdsc->mutex); |
2f2dc053 SW |
4370 | for (i = 0; i < mdsc->max_sessions; i++) { |
4371 | if (mdsc->sessions[i]) { | |
4372 | session = get_session(mdsc->sessions[i]); | |
2600d2dd | 4373 | __unregister_session(mdsc, session); |
2f2dc053 SW |
4374 | mutex_unlock(&mdsc->mutex); |
4375 | mutex_lock(&session->s_mutex); | |
4376 | remove_session_caps(session); | |
4377 | mutex_unlock(&session->s_mutex); | |
4378 | ceph_put_mds_session(session); | |
4379 | mutex_lock(&mdsc->mutex); | |
4380 | } | |
4381 | } | |
2f2dc053 | 4382 | WARN_ON(!list_empty(&mdsc->cap_delay_list)); |
2f2dc053 SW |
4383 | mutex_unlock(&mdsc->mutex); |
4384 | ||
75c9627e | 4385 | ceph_cleanup_snapid_map(mdsc); |
2f2dc053 SW |
4386 | ceph_cleanup_empty_realms(mdsc); |
4387 | ||
37c4efc1 | 4388 | cancel_work_sync(&mdsc->cap_reclaim_work); |
2f2dc053 SW |
4389 | cancel_delayed_work_sync(&mdsc->delayed_work); /* cancel timer */ |
4390 | ||
4391 | dout("stopped\n"); | |
4392 | } | |
4393 | ||
48fec5d0 YZ |
4394 | void ceph_mdsc_force_umount(struct ceph_mds_client *mdsc) |
4395 | { | |
4396 | struct ceph_mds_session *session; | |
4397 | int mds; | |
4398 | ||
4399 | dout("force umount\n"); | |
4400 | ||
4401 | mutex_lock(&mdsc->mutex); | |
4402 | for (mds = 0; mds < mdsc->max_sessions; mds++) { | |
4403 | session = __ceph_lookup_mds_session(mdsc, mds); | |
4404 | if (!session) | |
4405 | continue; | |
d468e729 YZ |
4406 | |
4407 | if (session->s_state == CEPH_MDS_SESSION_REJECTED) | |
4408 | __unregister_session(mdsc, session); | |
4409 | __wake_requests(mdsc, &session->s_waiting); | |
48fec5d0 | 4410 | mutex_unlock(&mdsc->mutex); |
d468e729 | 4411 | |
48fec5d0 YZ |
4412 | mutex_lock(&session->s_mutex); |
4413 | __close_session(mdsc, session); | |
4414 | if (session->s_state == CEPH_MDS_SESSION_CLOSING) { | |
4415 | cleanup_session_requests(mdsc, session); | |
4416 | remove_session_caps(session); | |
4417 | } | |
4418 | mutex_unlock(&session->s_mutex); | |
4419 | ceph_put_mds_session(session); | |
d468e729 | 4420 | |
48fec5d0 YZ |
4421 | mutex_lock(&mdsc->mutex); |
4422 | kick_requests(mdsc, mds); | |
4423 | } | |
4424 | __wake_requests(mdsc, &mdsc->waiting_for_map); | |
4425 | mutex_unlock(&mdsc->mutex); | |
4426 | } | |
4427 | ||
3d14c5d2 | 4428 | static void ceph_mdsc_stop(struct ceph_mds_client *mdsc) |
2f2dc053 SW |
4429 | { |
4430 | dout("stop\n"); | |
4431 | cancel_delayed_work_sync(&mdsc->delayed_work); /* cancel timer */ | |
4432 | if (mdsc->mdsmap) | |
4433 | ceph_mdsmap_destroy(mdsc->mdsmap); | |
4434 | kfree(mdsc->sessions); | |
37151668 | 4435 | ceph_caps_finalize(mdsc); |
10183a69 | 4436 | ceph_pool_perm_destroy(mdsc); |
2f2dc053 SW |
4437 | } |
4438 | ||
3d14c5d2 YS |
4439 | void ceph_mdsc_destroy(struct ceph_fs_client *fsc) |
4440 | { | |
4441 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
ef550f6f | 4442 | dout("mdsc_destroy %p\n", mdsc); |
ef550f6f | 4443 | |
50c55aec CX |
4444 | if (!mdsc) |
4445 | return; | |
4446 | ||
ef550f6f SW |
4447 | /* flush out any connection work with references to us */ |
4448 | ceph_msgr_flush(); | |
4449 | ||
62a65f36 YZ |
4450 | ceph_mdsc_stop(mdsc); |
4451 | ||
3d14c5d2 YS |
4452 | fsc->mdsc = NULL; |
4453 | kfree(mdsc); | |
ef550f6f | 4454 | dout("mdsc_destroy %p done\n", mdsc); |
3d14c5d2 YS |
4455 | } |
4456 | ||
430afbad YZ |
4457 | void ceph_mdsc_handle_fsmap(struct ceph_mds_client *mdsc, struct ceph_msg *msg) |
4458 | { | |
4459 | struct ceph_fs_client *fsc = mdsc->fsc; | |
4460 | const char *mds_namespace = fsc->mount_options->mds_namespace; | |
4461 | void *p = msg->front.iov_base; | |
4462 | void *end = p + msg->front.iov_len; | |
4463 | u32 epoch; | |
4464 | u32 map_len; | |
4465 | u32 num_fs; | |
4466 | u32 mount_fscid = (u32)-1; | |
4467 | u8 struct_v, struct_cv; | |
4468 | int err = -EINVAL; | |
4469 | ||
4470 | ceph_decode_need(&p, end, sizeof(u32), bad); | |
4471 | epoch = ceph_decode_32(&p); | |
4472 | ||
4473 | dout("handle_fsmap epoch %u\n", epoch); | |
4474 | ||
4475 | ceph_decode_need(&p, end, 2 + sizeof(u32), bad); | |
4476 | struct_v = ceph_decode_8(&p); | |
4477 | struct_cv = ceph_decode_8(&p); | |
4478 | map_len = ceph_decode_32(&p); | |
4479 | ||
4480 | ceph_decode_need(&p, end, sizeof(u32) * 3, bad); | |
4481 | p += sizeof(u32) * 2; /* skip epoch and legacy_client_fscid */ | |
4482 | ||
4483 | num_fs = ceph_decode_32(&p); | |
4484 | while (num_fs-- > 0) { | |
4485 | void *info_p, *info_end; | |
4486 | u32 info_len; | |
4487 | u8 info_v, info_cv; | |
4488 | u32 fscid, namelen; | |
4489 | ||
4490 | ceph_decode_need(&p, end, 2 + sizeof(u32), bad); | |
4491 | info_v = ceph_decode_8(&p); | |
4492 | info_cv = ceph_decode_8(&p); | |
4493 | info_len = ceph_decode_32(&p); | |
4494 | ceph_decode_need(&p, end, info_len, bad); | |
4495 | info_p = p; | |
4496 | info_end = p + info_len; | |
4497 | p = info_end; | |
4498 | ||
4499 | ceph_decode_need(&info_p, info_end, sizeof(u32) * 2, bad); | |
4500 | fscid = ceph_decode_32(&info_p); | |
4501 | namelen = ceph_decode_32(&info_p); | |
4502 | ceph_decode_need(&info_p, info_end, namelen, bad); | |
4503 | ||
4504 | if (mds_namespace && | |
4505 | strlen(mds_namespace) == namelen && | |
4506 | !strncmp(mds_namespace, (char *)info_p, namelen)) { | |
4507 | mount_fscid = fscid; | |
4508 | break; | |
4509 | } | |
4510 | } | |
4511 | ||
4512 | ceph_monc_got_map(&fsc->client->monc, CEPH_SUB_FSMAP, epoch); | |
4513 | if (mount_fscid != (u32)-1) { | |
4514 | fsc->client->monc.fs_cluster_id = mount_fscid; | |
4515 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, | |
4516 | 0, true); | |
4517 | ceph_monc_renew_subs(&fsc->client->monc); | |
4518 | } else { | |
4519 | err = -ENOENT; | |
4520 | goto err_out; | |
4521 | } | |
4522 | return; | |
76bd6ec4 | 4523 | |
430afbad YZ |
4524 | bad: |
4525 | pr_err("error decoding fsmap\n"); | |
4526 | err_out: | |
4527 | mutex_lock(&mdsc->mutex); | |
76bd6ec4 | 4528 | mdsc->mdsmap_err = err; |
430afbad YZ |
4529 | __wake_requests(mdsc, &mdsc->waiting_for_map); |
4530 | mutex_unlock(&mdsc->mutex); | |
430afbad | 4531 | } |
2f2dc053 SW |
4532 | |
4533 | /* | |
4534 | * handle mds map update. | |
4535 | */ | |
430afbad | 4536 | void ceph_mdsc_handle_mdsmap(struct ceph_mds_client *mdsc, struct ceph_msg *msg) |
2f2dc053 SW |
4537 | { |
4538 | u32 epoch; | |
4539 | u32 maplen; | |
4540 | void *p = msg->front.iov_base; | |
4541 | void *end = p + msg->front.iov_len; | |
4542 | struct ceph_mdsmap *newmap, *oldmap; | |
4543 | struct ceph_fsid fsid; | |
4544 | int err = -EINVAL; | |
4545 | ||
4546 | ceph_decode_need(&p, end, sizeof(fsid)+2*sizeof(u32), bad); | |
4547 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
3d14c5d2 | 4548 | if (ceph_check_fsid(mdsc->fsc->client, &fsid) < 0) |
0743304d | 4549 | return; |
c89136ea SW |
4550 | epoch = ceph_decode_32(&p); |
4551 | maplen = ceph_decode_32(&p); | |
2f2dc053 SW |
4552 | dout("handle_map epoch %u len %d\n", epoch, (int)maplen); |
4553 | ||
4554 | /* do we need it? */ | |
2f2dc053 SW |
4555 | mutex_lock(&mdsc->mutex); |
4556 | if (mdsc->mdsmap && epoch <= mdsc->mdsmap->m_epoch) { | |
4557 | dout("handle_map epoch %u <= our %u\n", | |
4558 | epoch, mdsc->mdsmap->m_epoch); | |
4559 | mutex_unlock(&mdsc->mutex); | |
4560 | return; | |
4561 | } | |
4562 | ||
4563 | newmap = ceph_mdsmap_decode(&p, end); | |
4564 | if (IS_ERR(newmap)) { | |
4565 | err = PTR_ERR(newmap); | |
4566 | goto bad_unlock; | |
4567 | } | |
4568 | ||
4569 | /* swap into place */ | |
4570 | if (mdsc->mdsmap) { | |
4571 | oldmap = mdsc->mdsmap; | |
4572 | mdsc->mdsmap = newmap; | |
4573 | check_new_map(mdsc, newmap, oldmap); | |
4574 | ceph_mdsmap_destroy(oldmap); | |
4575 | } else { | |
4576 | mdsc->mdsmap = newmap; /* first mds map */ | |
4577 | } | |
719784ba CX |
4578 | mdsc->fsc->max_file_size = min((loff_t)mdsc->mdsmap->m_max_file_size, |
4579 | MAX_LFS_FILESIZE); | |
2f2dc053 SW |
4580 | |
4581 | __wake_requests(mdsc, &mdsc->waiting_for_map); | |
82dcabad ID |
4582 | ceph_monc_got_map(&mdsc->fsc->client->monc, CEPH_SUB_MDSMAP, |
4583 | mdsc->mdsmap->m_epoch); | |
2f2dc053 SW |
4584 | |
4585 | mutex_unlock(&mdsc->mutex); | |
4586 | schedule_delayed(mdsc); | |
4587 | return; | |
4588 | ||
4589 | bad_unlock: | |
4590 | mutex_unlock(&mdsc->mutex); | |
4591 | bad: | |
4592 | pr_err("error decoding mdsmap %d\n", err); | |
4593 | return; | |
4594 | } | |
4595 | ||
4596 | static struct ceph_connection *con_get(struct ceph_connection *con) | |
4597 | { | |
4598 | struct ceph_mds_session *s = con->private; | |
4599 | ||
4600 | if (get_session(s)) { | |
3997c01d | 4601 | dout("mdsc con_get %p ok (%d)\n", s, refcount_read(&s->s_ref)); |
2f2dc053 SW |
4602 | return con; |
4603 | } | |
4604 | dout("mdsc con_get %p FAIL\n", s); | |
4605 | return NULL; | |
4606 | } | |
4607 | ||
4608 | static void con_put(struct ceph_connection *con) | |
4609 | { | |
4610 | struct ceph_mds_session *s = con->private; | |
4611 | ||
3997c01d | 4612 | dout("mdsc con_put %p (%d)\n", s, refcount_read(&s->s_ref) - 1); |
2f2dc053 SW |
4613 | ceph_put_mds_session(s); |
4614 | } | |
4615 | ||
4616 | /* | |
4617 | * if the client is unresponsive for long enough, the mds will kill | |
4618 | * the session entirely. | |
4619 | */ | |
4620 | static void peer_reset(struct ceph_connection *con) | |
4621 | { | |
4622 | struct ceph_mds_session *s = con->private; | |
7e70f0ed | 4623 | struct ceph_mds_client *mdsc = s->s_mdsc; |
2f2dc053 | 4624 | |
f3ae1b97 | 4625 | pr_warn("mds%d closed our session\n", s->s_mds); |
7e70f0ed | 4626 | send_mds_reconnect(mdsc, s); |
2f2dc053 SW |
4627 | } |
4628 | ||
4629 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
4630 | { | |
4631 | struct ceph_mds_session *s = con->private; | |
4632 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
4633 | int type = le16_to_cpu(msg->hdr.type); | |
4634 | ||
2600d2dd SW |
4635 | mutex_lock(&mdsc->mutex); |
4636 | if (__verify_registered_session(mdsc, s) < 0) { | |
4637 | mutex_unlock(&mdsc->mutex); | |
4638 | goto out; | |
4639 | } | |
4640 | mutex_unlock(&mdsc->mutex); | |
4641 | ||
2f2dc053 SW |
4642 | switch (type) { |
4643 | case CEPH_MSG_MDS_MAP: | |
430afbad YZ |
4644 | ceph_mdsc_handle_mdsmap(mdsc, msg); |
4645 | break; | |
4646 | case CEPH_MSG_FS_MAP_USER: | |
4647 | ceph_mdsc_handle_fsmap(mdsc, msg); | |
2f2dc053 SW |
4648 | break; |
4649 | case CEPH_MSG_CLIENT_SESSION: | |
4650 | handle_session(s, msg); | |
4651 | break; | |
4652 | case CEPH_MSG_CLIENT_REPLY: | |
4653 | handle_reply(s, msg); | |
4654 | break; | |
4655 | case CEPH_MSG_CLIENT_REQUEST_FORWARD: | |
2600d2dd | 4656 | handle_forward(mdsc, s, msg); |
2f2dc053 SW |
4657 | break; |
4658 | case CEPH_MSG_CLIENT_CAPS: | |
4659 | ceph_handle_caps(s, msg); | |
4660 | break; | |
4661 | case CEPH_MSG_CLIENT_SNAP: | |
2600d2dd | 4662 | ceph_handle_snap(mdsc, s, msg); |
2f2dc053 SW |
4663 | break; |
4664 | case CEPH_MSG_CLIENT_LEASE: | |
2600d2dd | 4665 | handle_lease(mdsc, s, msg); |
2f2dc053 | 4666 | break; |
fb18a575 LH |
4667 | case CEPH_MSG_CLIENT_QUOTA: |
4668 | ceph_handle_quota(mdsc, s, msg); | |
4669 | break; | |
2f2dc053 SW |
4670 | |
4671 | default: | |
4672 | pr_err("received unknown message type %d %s\n", type, | |
4673 | ceph_msg_type_name(type)); | |
4674 | } | |
2600d2dd | 4675 | out: |
2f2dc053 SW |
4676 | ceph_msg_put(msg); |
4677 | } | |
4678 | ||
4e7a5dcd SW |
4679 | /* |
4680 | * authentication | |
4681 | */ | |
a3530df3 AE |
4682 | |
4683 | /* | |
4684 | * Note: returned pointer is the address of a structure that's | |
4685 | * managed separately. Caller must *not* attempt to free it. | |
4686 | */ | |
4687 | static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, | |
8f43fb53 | 4688 | int *proto, int force_new) |
4e7a5dcd SW |
4689 | { |
4690 | struct ceph_mds_session *s = con->private; | |
4691 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
3d14c5d2 | 4692 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; |
74f1869f | 4693 | struct ceph_auth_handshake *auth = &s->s_auth; |
4e7a5dcd | 4694 | |
74f1869f | 4695 | if (force_new && auth->authorizer) { |
6c1ea260 | 4696 | ceph_auth_destroy_authorizer(auth->authorizer); |
74f1869f | 4697 | auth->authorizer = NULL; |
4e7a5dcd | 4698 | } |
27859f97 SW |
4699 | if (!auth->authorizer) { |
4700 | int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_MDS, | |
4701 | auth); | |
0bed9b5c SW |
4702 | if (ret) |
4703 | return ERR_PTR(ret); | |
27859f97 SW |
4704 | } else { |
4705 | int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_MDS, | |
4706 | auth); | |
a255651d | 4707 | if (ret) |
a3530df3 | 4708 | return ERR_PTR(ret); |
4e7a5dcd | 4709 | } |
4e7a5dcd | 4710 | *proto = ac->protocol; |
74f1869f | 4711 | |
a3530df3 | 4712 | return auth; |
4e7a5dcd SW |
4713 | } |
4714 | ||
6daca13d ID |
4715 | static int add_authorizer_challenge(struct ceph_connection *con, |
4716 | void *challenge_buf, int challenge_buf_len) | |
4717 | { | |
4718 | struct ceph_mds_session *s = con->private; | |
4719 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
4720 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; | |
4721 | ||
4722 | return ceph_auth_add_authorizer_challenge(ac, s->s_auth.authorizer, | |
4723 | challenge_buf, challenge_buf_len); | |
4724 | } | |
4e7a5dcd | 4725 | |
0dde5848 | 4726 | static int verify_authorizer_reply(struct ceph_connection *con) |
4e7a5dcd SW |
4727 | { |
4728 | struct ceph_mds_session *s = con->private; | |
4729 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
3d14c5d2 | 4730 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; |
4e7a5dcd | 4731 | |
0dde5848 | 4732 | return ceph_auth_verify_authorizer_reply(ac, s->s_auth.authorizer); |
4e7a5dcd SW |
4733 | } |
4734 | ||
9bd2e6f8 SW |
4735 | static int invalidate_authorizer(struct ceph_connection *con) |
4736 | { | |
4737 | struct ceph_mds_session *s = con->private; | |
4738 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
3d14c5d2 | 4739 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; |
9bd2e6f8 | 4740 | |
27859f97 | 4741 | ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_MDS); |
9bd2e6f8 | 4742 | |
3d14c5d2 | 4743 | return ceph_monc_validate_auth(&mdsc->fsc->client->monc); |
9bd2e6f8 SW |
4744 | } |
4745 | ||
53ded495 AE |
4746 | static struct ceph_msg *mds_alloc_msg(struct ceph_connection *con, |
4747 | struct ceph_msg_header *hdr, int *skip) | |
4748 | { | |
4749 | struct ceph_msg *msg; | |
4750 | int type = (int) le16_to_cpu(hdr->type); | |
4751 | int front_len = (int) le32_to_cpu(hdr->front_len); | |
4752 | ||
4753 | if (con->in_msg) | |
4754 | return con->in_msg; | |
4755 | ||
4756 | *skip = 0; | |
4757 | msg = ceph_msg_new(type, front_len, GFP_NOFS, false); | |
4758 | if (!msg) { | |
4759 | pr_err("unable to allocate msg type %d len %d\n", | |
4760 | type, front_len); | |
4761 | return NULL; | |
4762 | } | |
53ded495 AE |
4763 | |
4764 | return msg; | |
4765 | } | |
4766 | ||
79dbd1ba | 4767 | static int mds_sign_message(struct ceph_msg *msg) |
33d07337 | 4768 | { |
79dbd1ba | 4769 | struct ceph_mds_session *s = msg->con->private; |
33d07337 | 4770 | struct ceph_auth_handshake *auth = &s->s_auth; |
79dbd1ba | 4771 | |
33d07337 YZ |
4772 | return ceph_auth_sign_message(auth, msg); |
4773 | } | |
4774 | ||
79dbd1ba | 4775 | static int mds_check_message_signature(struct ceph_msg *msg) |
33d07337 | 4776 | { |
79dbd1ba | 4777 | struct ceph_mds_session *s = msg->con->private; |
33d07337 | 4778 | struct ceph_auth_handshake *auth = &s->s_auth; |
79dbd1ba | 4779 | |
33d07337 YZ |
4780 | return ceph_auth_check_message_signature(auth, msg); |
4781 | } | |
4782 | ||
9e32789f | 4783 | static const struct ceph_connection_operations mds_con_ops = { |
2f2dc053 SW |
4784 | .get = con_get, |
4785 | .put = con_put, | |
4786 | .dispatch = dispatch, | |
4e7a5dcd | 4787 | .get_authorizer = get_authorizer, |
6daca13d | 4788 | .add_authorizer_challenge = add_authorizer_challenge, |
4e7a5dcd | 4789 | .verify_authorizer_reply = verify_authorizer_reply, |
9bd2e6f8 | 4790 | .invalidate_authorizer = invalidate_authorizer, |
2f2dc053 | 4791 | .peer_reset = peer_reset, |
53ded495 | 4792 | .alloc_msg = mds_alloc_msg, |
79dbd1ba ID |
4793 | .sign_message = mds_sign_message, |
4794 | .check_message_signature = mds_check_message_signature, | |
2f2dc053 SW |
4795 | }; |
4796 | ||
2f2dc053 | 4797 | /* eof */ |