Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
355da1eb SW |
3 | |
4 | #include <linux/module.h> | |
5 | #include <linux/fs.h> | |
355da1eb SW |
6 | #include <linux/slab.h> |
7 | #include <linux/string.h> | |
8 | #include <linux/uaccess.h> | |
9 | #include <linux/kernel.h> | |
355da1eb SW |
10 | #include <linux/writeback.h> |
11 | #include <linux/vmalloc.h> | |
2cdeb1e4 | 12 | #include <linux/xattr.h> |
4db658ea | 13 | #include <linux/posix_acl.h> |
3e7fbe9c | 14 | #include <linux/random.h> |
a407846e | 15 | #include <linux/sort.h> |
a35ead31 | 16 | #include <linux/iversion.h> |
2d332d5b | 17 | #include <linux/fscrypt.h> |
355da1eb SW |
18 | |
19 | #include "super.h" | |
3d14c5d2 | 20 | #include "mds_client.h" |
99ccbd22 | 21 | #include "cache.h" |
2d332d5b | 22 | #include "crypto.h" |
3d14c5d2 | 23 | #include <linux/ceph/decode.h> |
355da1eb SW |
24 | |
25 | /* | |
26 | * Ceph inode operations | |
27 | * | |
28 | * Implement basic inode helpers (get, alloc) and inode ops (getattr, | |
29 | * setattr, etc.), xattr helpers, and helpers for assimilating | |
30 | * metadata returned by the MDS into our cache. | |
31 | * | |
32 | * Also define helpers for doing asynchronous writeback, invalidation, | |
33 | * and truncation for the benefit of those who can't afford to block | |
34 | * (typically because they are in the message handler path). | |
35 | */ | |
36 | ||
37 | static const struct inode_operations ceph_symlink_iops; | |
79f2f6ad | 38 | static const struct inode_operations ceph_encrypted_symlink_iops; |
355da1eb | 39 | |
1cf89a8d | 40 | static void ceph_inode_work(struct work_struct *work); |
355da1eb SW |
41 | |
42 | /* | |
43 | * find or create an inode, given the ceph ino number | |
44 | */ | |
ad1fee96 YS |
45 | static int ceph_set_ino_cb(struct inode *inode, void *data) |
46 | { | |
ebce3eb2 | 47 | struct ceph_inode_info *ci = ceph_inode(inode); |
1dd8d470 | 48 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
ebce3eb2 JL |
49 | |
50 | ci->i_vino = *(struct ceph_vino *)data; | |
51 | inode->i_ino = ceph_vino_to_ino_t(ci->i_vino); | |
a35ead31 | 52 | inode_set_iversion_raw(inode, 0); |
1dd8d470 XL |
53 | percpu_counter_inc(&mdsc->metric.total_inodes); |
54 | ||
ad1fee96 YS |
55 | return 0; |
56 | } | |
57 | ||
ec9595c0 JL |
58 | /** |
59 | * ceph_new_inode - allocate a new inode in advance of an expected create | |
60 | * @dir: parent directory for new inode | |
61 | * @dentry: dentry that may eventually point to new inode | |
62 | * @mode: mode of new inode | |
63 | * @as_ctx: pointer to inherited security context | |
64 | * | |
65 | * Allocate a new inode in advance of an operation to create a new inode. | |
66 | * This allocates the inode and sets up the acl_sec_ctx with appropriate | |
67 | * info for the new inode. | |
68 | * | |
69 | * Returns a pointer to the new inode or an ERR_PTR. | |
70 | */ | |
71 | struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry, | |
72 | umode_t *mode, struct ceph_acl_sec_ctx *as_ctx) | |
73 | { | |
74 | int err; | |
75 | struct inode *inode; | |
76 | ||
77 | inode = new_inode(dir->i_sb); | |
78 | if (!inode) | |
79 | return ERR_PTR(-ENOMEM); | |
80 | ||
bbb20ea9 XL |
81 | inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT; |
82 | ||
ec9595c0 JL |
83 | if (!S_ISLNK(*mode)) { |
84 | err = ceph_pre_init_acls(dir, mode, as_ctx); | |
85 | if (err < 0) | |
86 | goto out_err; | |
87 | } | |
88 | ||
6b5717bd JL |
89 | inode->i_state = 0; |
90 | inode->i_mode = *mode; | |
91 | ||
ec9595c0 JL |
92 | err = ceph_security_init_secctx(dentry, *mode, as_ctx); |
93 | if (err < 0) | |
94 | goto out_err; | |
95 | ||
dd66df00 LH |
96 | /* |
97 | * We'll skip setting fscrypt context for snapshots, leaving that for | |
98 | * the handle_reply(). | |
99 | */ | |
100 | if (ceph_snap(dir) != CEPH_SNAPDIR) { | |
101 | err = ceph_fscrypt_prepare_context(dir, inode, as_ctx); | |
102 | if (err) | |
103 | goto out_err; | |
104 | } | |
6b5717bd | 105 | |
ec9595c0 JL |
106 | return inode; |
107 | out_err: | |
108 | iput(inode); | |
109 | return ERR_PTR(err); | |
110 | } | |
111 | ||
112 | void ceph_as_ctx_to_req(struct ceph_mds_request *req, | |
113 | struct ceph_acl_sec_ctx *as_ctx) | |
114 | { | |
115 | if (as_ctx->pagelist) { | |
116 | req->r_pagelist = as_ctx->pagelist; | |
117 | as_ctx->pagelist = NULL; | |
118 | } | |
6b5717bd | 119 | ceph_fscrypt_as_ctx_to_req(req, as_ctx); |
ec9595c0 JL |
120 | } |
121 | ||
122 | /** | |
123 | * ceph_get_inode - find or create/hash a new inode | |
124 | * @sb: superblock to search and allocate in | |
125 | * @vino: vino to search for | |
126 | * @newino: optional new inode to insert if one isn't found (may be NULL) | |
127 | * | |
128 | * Search for or insert a new inode into the hash for the given vino, and | |
129 | * return a reference to it. If new is non-NULL, its reference is consumed. | |
130 | */ | |
131 | struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino, | |
132 | struct inode *newino) | |
355da1eb | 133 | { |
38d46409 XL |
134 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); |
135 | struct ceph_client *cl = mdsc->fsc->client; | |
355da1eb | 136 | struct inode *inode; |
355da1eb | 137 | |
d4f6b31d JL |
138 | if (ceph_vino_is_reserved(vino)) |
139 | return ERR_PTR(-EREMOTEIO); | |
140 | ||
ec9595c0 JL |
141 | if (newino) { |
142 | inode = inode_insert5(newino, (unsigned long)vino.ino, | |
143 | ceph_ino_compare, ceph_set_ino_cb, &vino); | |
144 | if (inode != newino) | |
145 | iput(newino); | |
146 | } else { | |
147 | inode = iget5_locked(sb, (unsigned long)vino.ino, | |
148 | ceph_ino_compare, ceph_set_ino_cb, &vino); | |
149 | } | |
150 | ||
151 | if (!inode) { | |
38d46409 | 152 | doutc(cl, "no inode found for %llx.%llx\n", vino.ino, vino.snap); |
355da1eb | 153 | return ERR_PTR(-ENOMEM); |
ec9595c0 | 154 | } |
355da1eb | 155 | |
38d46409 XL |
156 | doutc(cl, "on %llx=%llx.%llx got %p new %d\n", |
157 | ceph_present_inode(inode), ceph_vinop(inode), inode, | |
158 | !!(inode->i_state & I_NEW)); | |
355da1eb SW |
159 | return inode; |
160 | } | |
161 | ||
162 | /* | |
163 | * get/constuct snapdir inode for a given directory | |
164 | */ | |
165 | struct inode *ceph_get_snapdir(struct inode *parent) | |
166 | { | |
38d46409 | 167 | struct ceph_client *cl = ceph_inode_to_client(parent); |
355da1eb SW |
168 | struct ceph_vino vino = { |
169 | .ino = ceph_ino(parent), | |
170 | .snap = CEPH_SNAPDIR, | |
171 | }; | |
ec9595c0 | 172 | struct inode *inode = ceph_get_inode(parent->i_sb, vino, NULL); |
b377ff13 | 173 | struct ceph_inode_info *ci = ceph_inode(inode); |
dd66df00 | 174 | int ret = -ENOTDIR; |
355da1eb | 175 | |
355da1eb | 176 | if (IS_ERR(inode)) |
7e34bc52 | 177 | return inode; |
3e10a15f JL |
178 | |
179 | if (!S_ISDIR(parent->i_mode)) { | |
38d46409 XL |
180 | pr_warn_once_client(cl, "bad snapdir parent type (mode=0%o)\n", |
181 | parent->i_mode); | |
322794d3 | 182 | goto err; |
3e10a15f JL |
183 | } |
184 | ||
185 | if (!(inode->i_state & I_NEW) && !S_ISDIR(inode->i_mode)) { | |
38d46409 XL |
186 | pr_warn_once_client(cl, "bad snapdir inode type (mode=0%o)\n", |
187 | inode->i_mode); | |
322794d3 | 188 | goto err; |
3e10a15f JL |
189 | } |
190 | ||
355da1eb SW |
191 | inode->i_mode = parent->i_mode; |
192 | inode->i_uid = parent->i_uid; | |
193 | inode->i_gid = parent->i_gid; | |
c453bdb5 | 194 | inode_set_mtime_to_ts(inode, inode_get_mtime(parent)); |
7795aef0 | 195 | inode_set_ctime_to_ts(inode, inode_get_ctime(parent)); |
c453bdb5 | 196 | inode_set_atime_to_ts(inode, inode_get_atime(parent)); |
b377ff13 | 197 | ci->i_rbytes = 0; |
ef915725 | 198 | ci->i_btime = ceph_inode(parent)->i_btime; |
893e456b | 199 | |
dd66df00 LH |
200 | #ifdef CONFIG_FS_ENCRYPTION |
201 | /* if encrypted, just borrow fscrypt_auth from parent */ | |
202 | if (IS_ENCRYPTED(parent)) { | |
203 | struct ceph_inode_info *pci = ceph_inode(parent); | |
204 | ||
205 | ci->fscrypt_auth = kmemdup(pci->fscrypt_auth, | |
206 | pci->fscrypt_auth_len, | |
207 | GFP_KERNEL); | |
208 | if (ci->fscrypt_auth) { | |
209 | inode->i_flags |= S_ENCRYPTED; | |
210 | ci->fscrypt_auth_len = pci->fscrypt_auth_len; | |
211 | } else { | |
38d46409 | 212 | doutc(cl, "Failed to alloc snapdir fscrypt_auth\n"); |
dd66df00 LH |
213 | ret = -ENOMEM; |
214 | goto err; | |
215 | } | |
216 | } | |
217 | #endif | |
d3c51ae1 JL |
218 | if (inode->i_state & I_NEW) { |
219 | inode->i_op = &ceph_snapdir_iops; | |
220 | inode->i_fop = &ceph_snapdir_fops; | |
221 | ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ | |
893e456b | 222 | unlock_new_inode(inode); |
d3c51ae1 | 223 | } |
893e456b | 224 | |
355da1eb | 225 | return inode; |
322794d3 XL |
226 | err: |
227 | if ((inode->i_state & I_NEW)) | |
228 | discard_new_inode(inode); | |
229 | else | |
230 | iput(inode); | |
dd66df00 | 231 | return ERR_PTR(ret); |
355da1eb SW |
232 | } |
233 | ||
234 | const struct inode_operations ceph_file_iops = { | |
235 | .permission = ceph_permission, | |
236 | .setattr = ceph_setattr, | |
237 | .getattr = ceph_getattr, | |
355da1eb | 238 | .listxattr = ceph_listxattr, |
cac2f8b8 | 239 | .get_inode_acl = ceph_get_acl, |
72466d0b | 240 | .set_acl = ceph_set_acl, |
355da1eb SW |
241 | }; |
242 | ||
243 | ||
244 | /* | |
245 | * We use a 'frag tree' to keep track of the MDS's directory fragments | |
246 | * for a given inode (usually there is just a single fragment). We | |
247 | * need to know when a child frag is delegated to a new MDS, or when | |
248 | * it is flagged as replicated, so we can direct our requests | |
249 | * accordingly. | |
250 | */ | |
251 | ||
252 | /* | |
253 | * find/create a frag in the tree | |
254 | */ | |
255 | static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, | |
256 | u32 f) | |
257 | { | |
38d46409 XL |
258 | struct inode *inode = &ci->netfs.inode; |
259 | struct ceph_client *cl = ceph_inode_to_client(inode); | |
355da1eb SW |
260 | struct rb_node **p; |
261 | struct rb_node *parent = NULL; | |
262 | struct ceph_inode_frag *frag; | |
263 | int c; | |
264 | ||
265 | p = &ci->i_fragtree.rb_node; | |
266 | while (*p) { | |
267 | parent = *p; | |
268 | frag = rb_entry(parent, struct ceph_inode_frag, node); | |
269 | c = ceph_frag_compare(f, frag->frag); | |
270 | if (c < 0) | |
271 | p = &(*p)->rb_left; | |
272 | else if (c > 0) | |
273 | p = &(*p)->rb_right; | |
274 | else | |
275 | return frag; | |
276 | } | |
277 | ||
278 | frag = kmalloc(sizeof(*frag), GFP_NOFS); | |
51308806 | 279 | if (!frag) |
355da1eb | 280 | return ERR_PTR(-ENOMEM); |
51308806 | 281 | |
355da1eb SW |
282 | frag->frag = f; |
283 | frag->split_by = 0; | |
284 | frag->mds = -1; | |
285 | frag->ndist = 0; | |
286 | ||
287 | rb_link_node(&frag->node, parent, p); | |
288 | rb_insert_color(&frag->node, &ci->i_fragtree); | |
289 | ||
38d46409 | 290 | doutc(cl, "added %p %llx.%llx frag %x\n", inode, ceph_vinop(inode), f); |
355da1eb SW |
291 | return frag; |
292 | } | |
293 | ||
294 | /* | |
295 | * find a specific frag @f | |
296 | */ | |
297 | struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) | |
298 | { | |
299 | struct rb_node *n = ci->i_fragtree.rb_node; | |
300 | ||
301 | while (n) { | |
302 | struct ceph_inode_frag *frag = | |
303 | rb_entry(n, struct ceph_inode_frag, node); | |
304 | int c = ceph_frag_compare(f, frag->frag); | |
305 | if (c < 0) | |
306 | n = n->rb_left; | |
307 | else if (c > 0) | |
308 | n = n->rb_right; | |
309 | else | |
310 | return frag; | |
311 | } | |
312 | return NULL; | |
313 | } | |
314 | ||
315 | /* | |
316 | * Choose frag containing the given value @v. If @pfrag is | |
317 | * specified, copy the frag delegation info to the caller if | |
318 | * it is present. | |
319 | */ | |
3e7fbe9c YZ |
320 | static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
321 | struct ceph_inode_frag *pfrag, int *found) | |
355da1eb | 322 | { |
38d46409 | 323 | struct ceph_client *cl = ceph_inode_to_client(&ci->netfs.inode); |
355da1eb SW |
324 | u32 t = ceph_frag_make(0, 0); |
325 | struct ceph_inode_frag *frag; | |
326 | unsigned nway, i; | |
327 | u32 n; | |
328 | ||
329 | if (found) | |
330 | *found = 0; | |
331 | ||
355da1eb SW |
332 | while (1) { |
333 | WARN_ON(!ceph_frag_contains_value(t, v)); | |
334 | frag = __ceph_find_frag(ci, t); | |
335 | if (!frag) | |
336 | break; /* t is a leaf */ | |
337 | if (frag->split_by == 0) { | |
338 | if (pfrag) | |
339 | memcpy(pfrag, frag, sizeof(*pfrag)); | |
340 | if (found) | |
341 | *found = 1; | |
342 | break; | |
343 | } | |
344 | ||
345 | /* choose child */ | |
346 | nway = 1 << frag->split_by; | |
38d46409 XL |
347 | doutc(cl, "frag(%x) %x splits by %d (%d ways)\n", v, t, |
348 | frag->split_by, nway); | |
355da1eb SW |
349 | for (i = 0; i < nway; i++) { |
350 | n = ceph_frag_make_child(t, frag->split_by, i); | |
351 | if (ceph_frag_contains_value(n, v)) { | |
352 | t = n; | |
353 | break; | |
354 | } | |
355 | } | |
356 | BUG_ON(i == nway); | |
357 | } | |
38d46409 | 358 | doutc(cl, "frag(%x) = %x\n", v, t); |
355da1eb | 359 | |
355da1eb SW |
360 | return t; |
361 | } | |
362 | ||
3e7fbe9c YZ |
363 | u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
364 | struct ceph_inode_frag *pfrag, int *found) | |
365 | { | |
366 | u32 ret; | |
367 | mutex_lock(&ci->i_fragtree_mutex); | |
368 | ret = __ceph_choose_frag(ci, v, pfrag, found); | |
369 | mutex_unlock(&ci->i_fragtree_mutex); | |
370 | return ret; | |
371 | } | |
372 | ||
355da1eb SW |
373 | /* |
374 | * Process dirfrag (delegation) info from the mds. Include leaf | |
375 | * fragment in tree ONLY if ndist > 0. Otherwise, only | |
376 | * branches/splits are included in i_fragtree) | |
377 | */ | |
378 | static int ceph_fill_dirfrag(struct inode *inode, | |
379 | struct ceph_mds_reply_dirfrag *dirinfo) | |
380 | { | |
381 | struct ceph_inode_info *ci = ceph_inode(inode); | |
38d46409 | 382 | struct ceph_client *cl = ceph_inode_to_client(inode); |
355da1eb SW |
383 | struct ceph_inode_frag *frag; |
384 | u32 id = le32_to_cpu(dirinfo->frag); | |
385 | int mds = le32_to_cpu(dirinfo->auth); | |
386 | int ndist = le32_to_cpu(dirinfo->ndist); | |
8d08503c | 387 | int diri_auth = -1; |
355da1eb SW |
388 | int i; |
389 | int err = 0; | |
390 | ||
8d08503c YZ |
391 | spin_lock(&ci->i_ceph_lock); |
392 | if (ci->i_auth_cap) | |
393 | diri_auth = ci->i_auth_cap->mds; | |
394 | spin_unlock(&ci->i_ceph_lock); | |
395 | ||
42172119 YZ |
396 | if (mds == -1) /* CDIR_AUTH_PARENT */ |
397 | mds = diri_auth; | |
398 | ||
355da1eb | 399 | mutex_lock(&ci->i_fragtree_mutex); |
8d08503c | 400 | if (ndist == 0 && mds == diri_auth) { |
355da1eb SW |
401 | /* no delegation info needed. */ |
402 | frag = __ceph_find_frag(ci, id); | |
403 | if (!frag) | |
404 | goto out; | |
405 | if (frag->split_by == 0) { | |
406 | /* tree leaf, remove */ | |
38d46409 XL |
407 | doutc(cl, "removed %p %llx.%llx frag %x (no ref)\n", |
408 | inode, ceph_vinop(inode), id); | |
355da1eb SW |
409 | rb_erase(&frag->node, &ci->i_fragtree); |
410 | kfree(frag); | |
411 | } else { | |
412 | /* tree branch, keep and clear */ | |
38d46409 XL |
413 | doutc(cl, "cleared %p %llx.%llx frag %x referral\n", |
414 | inode, ceph_vinop(inode), id); | |
355da1eb SW |
415 | frag->mds = -1; |
416 | frag->ndist = 0; | |
417 | } | |
418 | goto out; | |
419 | } | |
420 | ||
421 | ||
422 | /* find/add this frag to store mds delegation info */ | |
423 | frag = __get_or_create_frag(ci, id); | |
424 | if (IS_ERR(frag)) { | |
425 | /* this is not the end of the world; we can continue | |
426 | with bad/inaccurate delegation info */ | |
38d46409 XL |
427 | pr_err_client(cl, "ENOMEM on mds ref %p %llx.%llx fg %x\n", |
428 | inode, ceph_vinop(inode), | |
429 | le32_to_cpu(dirinfo->frag)); | |
355da1eb SW |
430 | err = -ENOMEM; |
431 | goto out; | |
432 | } | |
433 | ||
434 | frag->mds = mds; | |
435 | frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); | |
436 | for (i = 0; i < frag->ndist; i++) | |
437 | frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); | |
38d46409 XL |
438 | doutc(cl, "%p %llx.%llx frag %x ndist=%d\n", inode, |
439 | ceph_vinop(inode), frag->frag, frag->ndist); | |
355da1eb SW |
440 | |
441 | out: | |
442 | mutex_unlock(&ci->i_fragtree_mutex); | |
443 | return err; | |
444 | } | |
445 | ||
a407846e YZ |
446 | static int frag_tree_split_cmp(const void *l, const void *r) |
447 | { | |
448 | struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l; | |
449 | struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r; | |
fe2ed425 JL |
450 | return ceph_frag_compare(le32_to_cpu(ls->frag), |
451 | le32_to_cpu(rs->frag)); | |
a407846e YZ |
452 | } |
453 | ||
a4b7431f YZ |
454 | static bool is_frag_child(u32 f, struct ceph_inode_frag *frag) |
455 | { | |
456 | if (!frag) | |
457 | return f == ceph_frag_make(0, 0); | |
458 | if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by) | |
459 | return false; | |
460 | return ceph_frag_contains_value(frag->frag, ceph_frag_value(f)); | |
461 | } | |
462 | ||
3e7fbe9c YZ |
463 | static int ceph_fill_fragtree(struct inode *inode, |
464 | struct ceph_frag_tree_head *fragtree, | |
465 | struct ceph_mds_reply_dirfrag *dirinfo) | |
466 | { | |
38d46409 | 467 | struct ceph_client *cl = ceph_inode_to_client(inode); |
3e7fbe9c | 468 | struct ceph_inode_info *ci = ceph_inode(inode); |
a4b7431f | 469 | struct ceph_inode_frag *frag, *prev_frag = NULL; |
3e7fbe9c | 470 | struct rb_node *rb_node; |
1b1bc16d YZ |
471 | unsigned i, split_by, nsplits; |
472 | u32 id; | |
3e7fbe9c YZ |
473 | bool update = false; |
474 | ||
475 | mutex_lock(&ci->i_fragtree_mutex); | |
476 | nsplits = le32_to_cpu(fragtree->nsplits); | |
1b1bc16d YZ |
477 | if (nsplits != ci->i_fragtree_nsplits) { |
478 | update = true; | |
479 | } else if (nsplits) { | |
8032bf12 | 480 | i = get_random_u32_below(nsplits); |
3e7fbe9c YZ |
481 | id = le32_to_cpu(fragtree->splits[i].frag); |
482 | if (!__ceph_find_frag(ci, id)) | |
483 | update = true; | |
484 | } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { | |
485 | rb_node = rb_first(&ci->i_fragtree); | |
486 | frag = rb_entry(rb_node, struct ceph_inode_frag, node); | |
487 | if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) | |
488 | update = true; | |
489 | } | |
490 | if (!update && dirinfo) { | |
491 | id = le32_to_cpu(dirinfo->frag); | |
492 | if (id != __ceph_choose_frag(ci, id, NULL, NULL)) | |
493 | update = true; | |
494 | } | |
495 | if (!update) | |
496 | goto out_unlock; | |
497 | ||
a407846e YZ |
498 | if (nsplits > 1) { |
499 | sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]), | |
500 | frag_tree_split_cmp, NULL); | |
501 | } | |
502 | ||
38d46409 | 503 | doutc(cl, "%p %llx.%llx\n", inode, ceph_vinop(inode)); |
3e7fbe9c YZ |
504 | rb_node = rb_first(&ci->i_fragtree); |
505 | for (i = 0; i < nsplits; i++) { | |
506 | id = le32_to_cpu(fragtree->splits[i].frag); | |
1b1bc16d YZ |
507 | split_by = le32_to_cpu(fragtree->splits[i].by); |
508 | if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) { | |
38d46409 XL |
509 | pr_err_client(cl, "%p %llx.%llx invalid split %d/%u, " |
510 | "frag %x split by %d\n", inode, | |
511 | ceph_vinop(inode), i, nsplits, id, split_by); | |
1b1bc16d YZ |
512 | continue; |
513 | } | |
3e7fbe9c YZ |
514 | frag = NULL; |
515 | while (rb_node) { | |
516 | frag = rb_entry(rb_node, struct ceph_inode_frag, node); | |
517 | if (ceph_frag_compare(frag->frag, id) >= 0) { | |
518 | if (frag->frag != id) | |
519 | frag = NULL; | |
520 | else | |
521 | rb_node = rb_next(rb_node); | |
522 | break; | |
523 | } | |
524 | rb_node = rb_next(rb_node); | |
a4b7431f YZ |
525 | /* delete stale split/leaf node */ |
526 | if (frag->split_by > 0 || | |
527 | !is_frag_child(frag->frag, prev_frag)) { | |
528 | rb_erase(&frag->node, &ci->i_fragtree); | |
1b1bc16d YZ |
529 | if (frag->split_by > 0) |
530 | ci->i_fragtree_nsplits--; | |
a4b7431f YZ |
531 | kfree(frag); |
532 | } | |
3e7fbe9c YZ |
533 | frag = NULL; |
534 | } | |
535 | if (!frag) { | |
536 | frag = __get_or_create_frag(ci, id); | |
537 | if (IS_ERR(frag)) | |
538 | continue; | |
539 | } | |
1b1bc16d YZ |
540 | if (frag->split_by == 0) |
541 | ci->i_fragtree_nsplits++; | |
542 | frag->split_by = split_by; | |
38d46409 | 543 | doutc(cl, " frag %x split by %d\n", frag->frag, frag->split_by); |
a4b7431f | 544 | prev_frag = frag; |
3e7fbe9c YZ |
545 | } |
546 | while (rb_node) { | |
547 | frag = rb_entry(rb_node, struct ceph_inode_frag, node); | |
548 | rb_node = rb_next(rb_node); | |
a4b7431f YZ |
549 | /* delete stale split/leaf node */ |
550 | if (frag->split_by > 0 || | |
551 | !is_frag_child(frag->frag, prev_frag)) { | |
552 | rb_erase(&frag->node, &ci->i_fragtree); | |
1b1bc16d YZ |
553 | if (frag->split_by > 0) |
554 | ci->i_fragtree_nsplits--; | |
a4b7431f YZ |
555 | kfree(frag); |
556 | } | |
3e7fbe9c YZ |
557 | } |
558 | out_unlock: | |
559 | mutex_unlock(&ci->i_fragtree_mutex); | |
560 | return 0; | |
561 | } | |
355da1eb SW |
562 | |
563 | /* | |
564 | * initialize a newly allocated inode. | |
565 | */ | |
566 | struct inode *ceph_alloc_inode(struct super_block *sb) | |
567 | { | |
38d46409 | 568 | struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb); |
355da1eb SW |
569 | struct ceph_inode_info *ci; |
570 | int i; | |
571 | ||
fd60b288 | 572 | ci = alloc_inode_sb(sb, ceph_inode_cachep, GFP_NOFS); |
355da1eb SW |
573 | if (!ci) |
574 | return NULL; | |
575 | ||
38d46409 | 576 | doutc(fsc->client, "%p\n", &ci->netfs.inode); |
355da1eb | 577 | |
bc899ee1 | 578 | /* Set parameters for the netfs library */ |
100ccd18 | 579 | netfs_inode_init(&ci->netfs, &ceph_netfs_ops, false); |
bc899ee1 | 580 | |
be655596 SW |
581 | spin_lock_init(&ci->i_ceph_lock); |
582 | ||
355da1eb | 583 | ci->i_version = 0; |
31c542a1 | 584 | ci->i_inline_version = 0; |
355da1eb SW |
585 | ci->i_time_warp_seq = 0; |
586 | ci->i_ceph_flags = 0; | |
fdd4e158 YZ |
587 | atomic64_set(&ci->i_ordered_count, 1); |
588 | atomic64_set(&ci->i_release_count, 1); | |
589 | atomic64_set(&ci->i_complete_seq[0], 0); | |
590 | atomic64_set(&ci->i_complete_seq[1], 0); | |
355da1eb SW |
591 | ci->i_symlink = NULL; |
592 | ||
fb18a575 LH |
593 | ci->i_max_bytes = 0; |
594 | ci->i_max_files = 0; | |
595 | ||
6c0f3af7 | 596 | memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); |
785892fe | 597 | memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout)); |
30c156d9 | 598 | RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL); |
6c0f3af7 | 599 | |
355da1eb SW |
600 | ci->i_fragtree = RB_ROOT; |
601 | mutex_init(&ci->i_fragtree_mutex); | |
602 | ||
603 | ci->i_xattrs.blob = NULL; | |
604 | ci->i_xattrs.prealloc_blob = NULL; | |
605 | ci->i_xattrs.dirty = false; | |
606 | ci->i_xattrs.index = RB_ROOT; | |
607 | ci->i_xattrs.count = 0; | |
608 | ci->i_xattrs.names_size = 0; | |
609 | ci->i_xattrs.vals_size = 0; | |
610 | ci->i_xattrs.version = 0; | |
611 | ci->i_xattrs.index_version = 0; | |
612 | ||
613 | ci->i_caps = RB_ROOT; | |
614 | ci->i_auth_cap = NULL; | |
615 | ci->i_dirty_caps = 0; | |
616 | ci->i_flushing_caps = 0; | |
617 | INIT_LIST_HEAD(&ci->i_dirty_item); | |
618 | INIT_LIST_HEAD(&ci->i_flushing_item); | |
f66fd9f0 | 619 | ci->i_prealloc_cap_flush = NULL; |
e4500b5e | 620 | INIT_LIST_HEAD(&ci->i_cap_flush_list); |
355da1eb | 621 | init_waitqueue_head(&ci->i_cap_wq); |
355da1eb SW |
622 | ci->i_hold_caps_max = 0; |
623 | INIT_LIST_HEAD(&ci->i_cap_delay_list); | |
355da1eb SW |
624 | INIT_LIST_HEAD(&ci->i_cap_snaps); |
625 | ci->i_head_snapc = NULL; | |
626 | ci->i_snap_caps = 0; | |
627 | ||
719a2514 | 628 | ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ; |
774a6a11 | 629 | for (i = 0; i < CEPH_FILE_MODE_BITS; i++) |
355da1eb SW |
630 | ci->i_nr_by_mode[i] = 0; |
631 | ||
b0d7c223 | 632 | mutex_init(&ci->i_truncate_mutex); |
355da1eb SW |
633 | ci->i_truncate_seq = 0; |
634 | ci->i_truncate_size = 0; | |
635 | ci->i_truncate_pending = 0; | |
5c64737d | 636 | ci->i_truncate_pagecache_size = 0; |
355da1eb SW |
637 | |
638 | ci->i_max_size = 0; | |
639 | ci->i_reported_size = 0; | |
640 | ci->i_wanted_max_size = 0; | |
641 | ci->i_requested_max_size = 0; | |
642 | ||
643 | ci->i_pin_ref = 0; | |
644 | ci->i_rd_ref = 0; | |
645 | ci->i_rdcache_ref = 0; | |
646 | ci->i_wr_ref = 0; | |
d3d0720d | 647 | ci->i_wb_ref = 0; |
f85122af | 648 | ci->i_fx_ref = 0; |
355da1eb SW |
649 | ci->i_wrbuffer_ref = 0; |
650 | ci->i_wrbuffer_ref_head = 0; | |
89aa5930 | 651 | atomic_set(&ci->i_filelock_ref, 0); |
1e9c2eb6 | 652 | atomic_set(&ci->i_shared_gen, 1); |
355da1eb SW |
653 | ci->i_rdcache_gen = 0; |
654 | ci->i_rdcache_revoking = 0; | |
655 | ||
355da1eb | 656 | INIT_LIST_HEAD(&ci->i_unsafe_dirops); |
68cd5b4b | 657 | INIT_LIST_HEAD(&ci->i_unsafe_iops); |
355da1eb SW |
658 | spin_lock_init(&ci->i_unsafe_lock); |
659 | ||
660 | ci->i_snap_realm = NULL; | |
661 | INIT_LIST_HEAD(&ci->i_snap_realm_item); | |
662 | INIT_LIST_HEAD(&ci->i_snap_flush_item); | |
663 | ||
1cf89a8d YZ |
664 | INIT_WORK(&ci->i_work, ceph_inode_work); |
665 | ci->i_work_mask = 0; | |
245ce991 | 666 | memset(&ci->i_btime, '\0', sizeof(ci->i_btime)); |
2d332d5b JL |
667 | #ifdef CONFIG_FS_ENCRYPTION |
668 | ci->fscrypt_auth = NULL; | |
669 | ci->fscrypt_auth_len = 0; | |
670 | #endif | |
874c8ca1 | 671 | return &ci->netfs.inode; |
355da1eb SW |
672 | } |
673 | ||
cfa6d412 | 674 | void ceph_free_inode(struct inode *inode) |
fa0d7e3d | 675 | { |
fa0d7e3d NP |
676 | struct ceph_inode_info *ci = ceph_inode(inode); |
677 | ||
daf5cc27 | 678 | kfree(ci->i_symlink); |
2d332d5b JL |
679 | #ifdef CONFIG_FS_ENCRYPTION |
680 | kfree(ci->fscrypt_auth); | |
681 | #endif | |
79f2f6ad | 682 | fscrypt_free_inode(inode); |
fa0d7e3d NP |
683 | kmem_cache_free(ceph_inode_cachep, ci); |
684 | } | |
685 | ||
87bc5b89 | 686 | void ceph_evict_inode(struct inode *inode) |
355da1eb SW |
687 | { |
688 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1dd8d470 | 689 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
38d46409 | 690 | struct ceph_client *cl = ceph_inode_to_client(inode); |
355da1eb SW |
691 | struct ceph_inode_frag *frag; |
692 | struct rb_node *n; | |
693 | ||
38d46409 | 694 | doutc(cl, "%p ino %llx.%llx\n", inode, ceph_vinop(inode)); |
87bc5b89 | 695 | |
1dd8d470 XL |
696 | percpu_counter_dec(&mdsc->metric.total_inodes); |
697 | ||
92764e88 | 698 | netfs_wait_for_outstanding_io(inode); |
87bc5b89 | 699 | truncate_inode_pages_final(&inode->i_data); |
c9c4ff12 | 700 | if (inode->i_state & I_PINNING_NETFS_WB) |
400e1286 | 701 | ceph_fscache_unuse_cookie(inode, true); |
87bc5b89 | 702 | clear_inode(inode); |
355da1eb | 703 | |
99ccbd22 | 704 | ceph_fscache_unregister_inode_cookie(ci); |
2d332d5b | 705 | fscrypt_put_encryption_info(inode); |
99ccbd22 | 706 | |
d6e47819 | 707 | __ceph_remove_caps(ci); |
355da1eb | 708 | |
55ab5520 | 709 | if (__ceph_has_quota(ci, QUOTA_GET_ANY)) |
d557c48d LH |
710 | ceph_adjust_quota_realms_count(inode, false); |
711 | ||
8b218b8a SW |
712 | /* |
713 | * we may still have a snap_realm reference if there are stray | |
d9df2783 | 714 | * caps in i_snap_caps. |
8b218b8a SW |
715 | */ |
716 | if (ci->i_snap_realm) { | |
75c9627e | 717 | if (ceph_snap(inode) == CEPH_NOSNAP) { |
38d46409 XL |
718 | doutc(cl, " dropping residual ref to snap realm %p\n", |
719 | ci->i_snap_realm); | |
0ba92e1c | 720 | ceph_change_snap_realm(inode, NULL); |
75c9627e YZ |
721 | } else { |
722 | ceph_put_snapid_map(mdsc, ci->i_snapid_map); | |
723 | ci->i_snap_realm = NULL; | |
724 | } | |
8b218b8a SW |
725 | } |
726 | ||
355da1eb SW |
727 | while ((n = rb_first(&ci->i_fragtree)) != NULL) { |
728 | frag = rb_entry(n, struct ceph_inode_frag, node); | |
729 | rb_erase(n, &ci->i_fragtree); | |
730 | kfree(frag); | |
731 | } | |
1b1bc16d | 732 | ci->i_fragtree_nsplits = 0; |
355da1eb SW |
733 | |
734 | __ceph_destroy_xattrs(ci); | |
b6c1d5b8 SW |
735 | if (ci->i_xattrs.blob) |
736 | ceph_buffer_put(ci->i_xattrs.blob); | |
737 | if (ci->i_xattrs.prealloc_blob) | |
738 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); | |
355da1eb | 739 | |
779fe0fb | 740 | ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns)); |
785892fe | 741 | ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns)); |
355da1eb SW |
742 | } |
743 | ||
224a7542 YZ |
744 | static inline blkcnt_t calc_inode_blocks(u64 size) |
745 | { | |
746 | return (size + (1<<9) - 1) >> 9; | |
747 | } | |
748 | ||
355da1eb SW |
749 | /* |
750 | * Helpers to fill in size, ctime, mtime, and atime. We have to be | |
751 | * careful because either the client or MDS may have more up to date | |
752 | * info, depending on which capabilities are held, and whether | |
753 | * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime | |
754 | * and size are monotonically increasing, except when utimes() or | |
755 | * truncate() increments the corresponding _seq values.) | |
756 | */ | |
757 | int ceph_fill_file_size(struct inode *inode, int issued, | |
758 | u32 truncate_seq, u64 truncate_size, u64 size) | |
759 | { | |
38d46409 | 760 | struct ceph_client *cl = ceph_inode_to_client(inode); |
355da1eb SW |
761 | struct ceph_inode_info *ci = ceph_inode(inode); |
762 | int queue_trunc = 0; | |
2d6795fb | 763 | loff_t isize = i_size_read(inode); |
355da1eb SW |
764 | |
765 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || | |
2d6795fb | 766 | (truncate_seq == ci->i_truncate_seq && size > isize)) { |
38d46409 | 767 | doutc(cl, "size %lld -> %llu\n", isize, size); |
a3d714c3 | 768 | if (size > 0 && S_ISDIR(inode->i_mode)) { |
38d46409 | 769 | pr_err_client(cl, "non-zero size for directory\n"); |
a3d714c3 YZ |
770 | size = 0; |
771 | } | |
99c88e69 | 772 | i_size_write(inode, size); |
224a7542 | 773 | inode->i_blocks = calc_inode_blocks(size); |
400e1286 JL |
774 | /* |
775 | * If we're expanding, then we should be able to just update | |
776 | * the existing cookie. | |
777 | */ | |
778 | if (size > isize) | |
779 | ceph_fscache_update(inode); | |
355da1eb SW |
780 | ci->i_reported_size = size; |
781 | if (truncate_seq != ci->i_truncate_seq) { | |
38d46409 XL |
782 | doutc(cl, "truncate_seq %u -> %u\n", |
783 | ci->i_truncate_seq, truncate_seq); | |
355da1eb | 784 | ci->i_truncate_seq = truncate_seq; |
b0d7c223 YZ |
785 | |
786 | /* the MDS should have revoked these caps */ | |
15c0a870 | 787 | WARN_ON_ONCE(issued & (CEPH_CAP_FILE_RD | |
b0d7c223 | 788 | CEPH_CAP_FILE_LAZYIO)); |
3d497d85 YS |
789 | /* |
790 | * If we hold relevant caps, or in the case where we're | |
791 | * not the only client referencing this file and we | |
792 | * don't hold those caps, then we need to check whether | |
793 | * the file is either opened or mmaped | |
794 | */ | |
b0d7c223 YZ |
795 | if ((issued & (CEPH_CAP_FILE_CACHE| |
796 | CEPH_CAP_FILE_BUFFER)) || | |
3d497d85 | 797 | mapping_mapped(inode->i_mapping) || |
719a2514 | 798 | __ceph_is_file_opened(ci)) { |
355da1eb SW |
799 | ci->i_truncate_pending++; |
800 | queue_trunc = 1; | |
801 | } | |
802 | } | |
803 | } | |
295fc4aa XL |
804 | |
805 | /* | |
806 | * It's possible that the new sizes of the two consecutive | |
807 | * size truncations will be in the same fscrypt last block, | |
808 | * and we need to truncate the corresponding page caches | |
809 | * anyway. | |
810 | */ | |
811 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0) { | |
38d46409 XL |
812 | doutc(cl, "truncate_size %lld -> %llu, encrypted %d\n", |
813 | ci->i_truncate_size, truncate_size, | |
814 | !!IS_ENCRYPTED(inode)); | |
295fc4aa | 815 | |
355da1eb | 816 | ci->i_truncate_size = truncate_size; |
295fc4aa XL |
817 | |
818 | if (IS_ENCRYPTED(inode)) { | |
38d46409 XL |
819 | doutc(cl, "truncate_pagecache_size %lld -> %llu\n", |
820 | ci->i_truncate_pagecache_size, size); | |
5c64737d | 821 | ci->i_truncate_pagecache_size = size; |
295fc4aa | 822 | } else { |
5c64737d | 823 | ci->i_truncate_pagecache_size = truncate_size; |
295fc4aa | 824 | } |
355da1eb SW |
825 | } |
826 | return queue_trunc; | |
827 | } | |
828 | ||
829 | void ceph_fill_file_time(struct inode *inode, int issued, | |
9bbeab41 AB |
830 | u64 time_warp_seq, struct timespec64 *ctime, |
831 | struct timespec64 *mtime, struct timespec64 *atime) | |
355da1eb | 832 | { |
38d46409 | 833 | struct ceph_client *cl = ceph_inode_to_client(inode); |
355da1eb | 834 | struct ceph_inode_info *ci = ceph_inode(inode); |
7795aef0 | 835 | struct timespec64 ictime = inode_get_ctime(inode); |
355da1eb SW |
836 | int warn = 0; |
837 | ||
838 | if (issued & (CEPH_CAP_FILE_EXCL| | |
839 | CEPH_CAP_FILE_WR| | |
d8672d64 SW |
840 | CEPH_CAP_FILE_BUFFER| |
841 | CEPH_CAP_AUTH_EXCL| | |
842 | CEPH_CAP_XATTR_EXCL)) { | |
ffdeec7a | 843 | if (ci->i_version == 0 || |
7795aef0 | 844 | timespec64_compare(ctime, &ictime) > 0) { |
38d46409 | 845 | doutc(cl, "ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n", |
7795aef0 | 846 | ictime.tv_sec, ictime.tv_nsec, |
9bbeab41 | 847 | ctime->tv_sec, ctime->tv_nsec); |
7795aef0 | 848 | inode_set_ctime_to_ts(inode, *ctime); |
355da1eb | 849 | } |
ffdeec7a YZ |
850 | if (ci->i_version == 0 || |
851 | ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { | |
355da1eb | 852 | /* the MDS did a utimes() */ |
38d46409 | 853 | doutc(cl, "mtime %lld.%09ld -> %lld.%09ld tw %d -> %d\n", |
c453bdb5 JL |
854 | inode_get_mtime_sec(inode), |
855 | inode_get_mtime_nsec(inode), | |
9bbeab41 | 856 | mtime->tv_sec, mtime->tv_nsec, |
355da1eb SW |
857 | ci->i_time_warp_seq, (int)time_warp_seq); |
858 | ||
c453bdb5 JL |
859 | inode_set_mtime_to_ts(inode, *mtime); |
860 | inode_set_atime_to_ts(inode, *atime); | |
355da1eb SW |
861 | ci->i_time_warp_seq = time_warp_seq; |
862 | } else if (time_warp_seq == ci->i_time_warp_seq) { | |
c453bdb5 JL |
863 | struct timespec64 ts; |
864 | ||
355da1eb | 865 | /* nobody did utimes(); take the max */ |
c453bdb5 JL |
866 | ts = inode_get_mtime(inode); |
867 | if (timespec64_compare(mtime, &ts) > 0) { | |
38d46409 | 868 | doutc(cl, "mtime %lld.%09ld -> %lld.%09ld inc\n", |
c453bdb5 | 869 | ts.tv_sec, ts.tv_nsec, |
9bbeab41 | 870 | mtime->tv_sec, mtime->tv_nsec); |
c453bdb5 | 871 | inode_set_mtime_to_ts(inode, *mtime); |
355da1eb | 872 | } |
c453bdb5 JL |
873 | ts = inode_get_atime(inode); |
874 | if (timespec64_compare(atime, &ts) > 0) { | |
38d46409 | 875 | doutc(cl, "atime %lld.%09ld -> %lld.%09ld inc\n", |
c453bdb5 | 876 | ts.tv_sec, ts.tv_nsec, |
9bbeab41 | 877 | atime->tv_sec, atime->tv_nsec); |
c453bdb5 | 878 | inode_set_atime_to_ts(inode, *atime); |
355da1eb SW |
879 | } |
880 | } else if (issued & CEPH_CAP_FILE_EXCL) { | |
881 | /* we did a utimes(); ignore mds values */ | |
882 | } else { | |
883 | warn = 1; | |
884 | } | |
885 | } else { | |
d8672d64 | 886 | /* we have no write|excl caps; whatever the MDS says is true */ |
355da1eb | 887 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { |
7795aef0 | 888 | inode_set_ctime_to_ts(inode, *ctime); |
c453bdb5 JL |
889 | inode_set_mtime_to_ts(inode, *mtime); |
890 | inode_set_atime_to_ts(inode, *atime); | |
355da1eb SW |
891 | ci->i_time_warp_seq = time_warp_seq; |
892 | } else { | |
893 | warn = 1; | |
894 | } | |
895 | } | |
896 | if (warn) /* time_warp_seq shouldn't go backwards */ | |
38d46409 XL |
897 | doutc(cl, "%p mds time_warp_seq %llu < %u\n", inode, |
898 | time_warp_seq, ci->i_time_warp_seq); | |
355da1eb SW |
899 | } |
900 | ||
79f2f6ad | 901 | #if IS_ENABLED(CONFIG_FS_ENCRYPTION) |
38d46409 XL |
902 | static int decode_encrypted_symlink(struct ceph_mds_client *mdsc, |
903 | const char *encsym, | |
904 | int enclen, u8 **decsym) | |
79f2f6ad | 905 | { |
38d46409 | 906 | struct ceph_client *cl = mdsc->fsc->client; |
79f2f6ad JL |
907 | int declen; |
908 | u8 *sym; | |
909 | ||
910 | sym = kmalloc(enclen + 1, GFP_NOFS); | |
911 | if (!sym) | |
912 | return -ENOMEM; | |
913 | ||
914 | declen = ceph_base64_decode(encsym, enclen, sym); | |
915 | if (declen < 0) { | |
38d46409 XL |
916 | pr_err_client(cl, |
917 | "can't decode symlink (%d). Content: %.*s\n", | |
918 | declen, enclen, encsym); | |
79f2f6ad JL |
919 | kfree(sym); |
920 | return -EIO; | |
921 | } | |
922 | sym[declen + 1] = '\0'; | |
923 | *decsym = sym; | |
924 | return declen; | |
925 | } | |
926 | #else | |
38d46409 XL |
927 | static int decode_encrypted_symlink(struct ceph_mds_client *mdsc, |
928 | const char *encsym, | |
929 | int symlen, u8 **decsym) | |
79f2f6ad JL |
930 | { |
931 | return -EOPNOTSUPP; | |
932 | } | |
933 | #endif | |
934 | ||
355da1eb SW |
935 | /* |
936 | * Populate an inode based on info from mds. May be called on new or | |
937 | * existing inodes. | |
938 | */ | |
966c7160 JL |
939 | int ceph_fill_inode(struct inode *inode, struct page *locked_page, |
940 | struct ceph_mds_reply_info_in *iinfo, | |
941 | struct ceph_mds_reply_dirfrag *dirinfo, | |
942 | struct ceph_mds_session *session, int cap_fmode, | |
943 | struct ceph_cap_reservation *caps_reservation) | |
355da1eb | 944 | { |
2678da88 | 945 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
38d46409 | 946 | struct ceph_client *cl = mdsc->fsc->client; |
355da1eb SW |
947 | struct ceph_mds_reply_inode *info = iinfo->in; |
948 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2af54a72 | 949 | int issued, new_issued, info_caps; |
9bbeab41 | 950 | struct timespec64 mtime, atime, ctime; |
355da1eb | 951 | struct ceph_buffer *xattr_blob = NULL; |
af8a85a4 | 952 | struct ceph_buffer *old_blob = NULL; |
779fe0fb | 953 | struct ceph_string *pool_ns = NULL; |
d9df2783 | 954 | struct ceph_cap *new_cap = NULL; |
355da1eb | 955 | int err = 0; |
d9df2783 | 956 | bool wake = false; |
f98a128a YZ |
957 | bool queue_trunc = false; |
958 | bool new_version = false; | |
31c542a1 | 959 | bool fill_inline = false; |
ed94f87c JL |
960 | umode_t mode = le32_to_cpu(info->mode); |
961 | dev_t rdev = le32_to_cpu(info->rdev); | |
355da1eb | 962 | |
27171ae6 JL |
963 | lockdep_assert_held(&mdsc->snap_rwsem); |
964 | ||
38d46409 XL |
965 | doutc(cl, "%p ino %llx.%llx v %llu had %llu\n", inode, ceph_vinop(inode), |
966 | le64_to_cpu(info->version), ci->i_version); | |
355da1eb | 967 | |
ed94f87c JL |
968 | /* Once I_NEW is cleared, we can't change type or dev numbers */ |
969 | if (inode->i_state & I_NEW) { | |
970 | inode->i_mode = mode; | |
971 | } else { | |
972 | if (inode_wrong_type(inode, mode)) { | |
38d46409 XL |
973 | pr_warn_once_client(cl, |
974 | "inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n", | |
975 | ceph_vinop(inode), inode->i_mode, mode); | |
ed94f87c JL |
976 | return -ESTALE; |
977 | } | |
978 | ||
979 | if ((S_ISCHR(mode) || S_ISBLK(mode)) && inode->i_rdev != rdev) { | |
38d46409 XL |
980 | pr_warn_once_client(cl, |
981 | "dev inode rdev changed! (ino %llx.%llx is %u:%u, mds says %u:%u)\n", | |
982 | ceph_vinop(inode), MAJOR(inode->i_rdev), | |
983 | MINOR(inode->i_rdev), MAJOR(rdev), | |
984 | MINOR(rdev)); | |
ed94f87c JL |
985 | return -ESTALE; |
986 | } | |
987 | } | |
988 | ||
2af54a72 YZ |
989 | info_caps = le32_to_cpu(info->cap.caps); |
990 | ||
d9df2783 | 991 | /* prealloc new cap struct */ |
9a6bed4f | 992 | if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) { |
d9df2783 | 993 | new_cap = ceph_get_cap(mdsc, caps_reservation); |
9a6bed4f JL |
994 | if (!new_cap) |
995 | return -ENOMEM; | |
996 | } | |
d9df2783 | 997 | |
355da1eb SW |
998 | /* |
999 | * prealloc xattr data, if it looks like we'll need it. only | |
1000 | * if len > 4 (meaning there are actually xattrs; the first 4 | |
1001 | * bytes are the xattr count). | |
1002 | */ | |
1003 | if (iinfo->xattr_len > 4) { | |
b6c1d5b8 | 1004 | xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); |
355da1eb | 1005 | if (!xattr_blob) |
38d46409 XL |
1006 | pr_err_client(cl, "ENOMEM xattr blob %d bytes\n", |
1007 | iinfo->xattr_len); | |
355da1eb SW |
1008 | } |
1009 | ||
779fe0fb YZ |
1010 | if (iinfo->pool_ns_len > 0) |
1011 | pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data, | |
1012 | iinfo->pool_ns_len); | |
1013 | ||
75c9627e YZ |
1014 | if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map) |
1015 | ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode)); | |
1016 | ||
be655596 | 1017 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1018 | |
1019 | /* | |
1020 | * provided version will be odd if inode value is projected, | |
8bd59e01 SW |
1021 | * even if stable. skip the update if we have newer stable |
1022 | * info (ours>=theirs, e.g. due to racing mds replies), unless | |
1023 | * we are getting projected (unstable) info (in which case the | |
1024 | * version is odd, and we want ours>theirs). | |
1025 | * us them | |
1026 | * 2 2 skip | |
1027 | * 3 2 skip | |
1028 | * 3 3 update | |
355da1eb | 1029 | */ |
f98a128a YZ |
1030 | if (ci->i_version == 0 || |
1031 | ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && | |
1032 | le64_to_cpu(info->version) > (ci->i_version & ~1))) | |
1033 | new_version = true; | |
1034 | ||
a35ead31 JL |
1035 | /* Update change_attribute */ |
1036 | inode_set_max_iversion_raw(inode, iinfo->change_attr); | |
1037 | ||
2af54a72 YZ |
1038 | __ceph_caps_issued(ci, &issued); |
1039 | issued |= __ceph_caps_dirty(ci); | |
1040 | new_issued = ~issued & info_caps; | |
355da1eb | 1041 | |
d557c48d | 1042 | __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files); |
fb18a575 | 1043 | |
2d332d5b | 1044 | #ifdef CONFIG_FS_ENCRYPTION |
e127e030 LH |
1045 | if (iinfo->fscrypt_auth_len && |
1046 | ((inode->i_state & I_NEW) || (ci->fscrypt_auth_len == 0))) { | |
2d332d5b JL |
1047 | kfree(ci->fscrypt_auth); |
1048 | ci->fscrypt_auth_len = iinfo->fscrypt_auth_len; | |
1049 | ci->fscrypt_auth = iinfo->fscrypt_auth; | |
1050 | iinfo->fscrypt_auth = NULL; | |
1051 | iinfo->fscrypt_auth_len = 0; | |
1052 | inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED); | |
1053 | } | |
1054 | #endif | |
1055 | ||
f98a128a YZ |
1056 | if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && |
1057 | (issued & CEPH_CAP_AUTH_EXCL) == 0) { | |
ed94f87c | 1058 | inode->i_mode = mode; |
ab871b90 EB |
1059 | inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); |
1060 | inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); | |
38d46409 XL |
1061 | doutc(cl, "%p %llx.%llx mode 0%o uid.gid %d.%d\n", inode, |
1062 | ceph_vinop(inode), inode->i_mode, | |
1063 | from_kuid(&init_user_ns, inode->i_uid), | |
1064 | from_kgid(&init_user_ns, inode->i_gid)); | |
245ce991 | 1065 | ceph_decode_timespec64(&ci->i_btime, &iinfo->btime); |
193e7b37 | 1066 | ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime); |
355da1eb SW |
1067 | } |
1068 | ||
94af0470 JL |
1069 | /* directories have fl_stripe_unit set to zero */ |
1070 | if (IS_ENCRYPTED(inode)) | |
1071 | inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT; | |
1072 | else if (le32_to_cpu(info->layout.fl_stripe_unit)) | |
1073 | inode->i_blkbits = | |
1074 | fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; | |
1075 | else | |
1076 | inode->i_blkbits = CEPH_BLOCK_SHIFT; | |
1077 | ||
f98a128a YZ |
1078 | if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && |
1079 | (issued & CEPH_CAP_LINK_EXCL) == 0) | |
bfe86848 | 1080 | set_nlink(inode, le32_to_cpu(info->nlink)); |
355da1eb | 1081 | |
f98a128a YZ |
1082 | if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { |
1083 | /* be careful with mtime, atime, size */ | |
9bbeab41 AB |
1084 | ceph_decode_timespec64(&atime, &info->atime); |
1085 | ceph_decode_timespec64(&mtime, &info->mtime); | |
1086 | ceph_decode_timespec64(&ctime, &info->ctime); | |
f98a128a YZ |
1087 | ceph_fill_file_time(inode, issued, |
1088 | le32_to_cpu(info->time_warp_seq), | |
1089 | &ctime, &mtime, &atime); | |
1090 | } | |
1091 | ||
2af54a72 YZ |
1092 | if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) { |
1093 | ci->i_files = le64_to_cpu(info->files); | |
1094 | ci->i_subdirs = le64_to_cpu(info->subdirs); | |
1095 | } | |
1096 | ||
f98a128a YZ |
1097 | if (new_version || |
1098 | (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { | |
16be62fc | 1099 | u64 size = le64_to_cpu(info->size); |
7627151e | 1100 | s64 old_pool = ci->i_layout.pool_id; |
779fe0fb YZ |
1101 | struct ceph_string *old_ns; |
1102 | ||
7627151e | 1103 | ceph_file_layout_from_legacy(&ci->i_layout, &info->layout); |
779fe0fb YZ |
1104 | old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, |
1105 | lockdep_is_held(&ci->i_ceph_lock)); | |
1106 | rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns); | |
1107 | ||
1108 | if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns) | |
10183a69 | 1109 | ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; |
10183a69 | 1110 | |
779fe0fb | 1111 | pool_ns = old_ns; |
10183a69 | 1112 | |
16be62fc JL |
1113 | if (IS_ENCRYPTED(inode) && size && |
1114 | iinfo->fscrypt_file_len == sizeof(__le64)) { | |
1115 | u64 fsize = __le64_to_cpu(*(__le64 *)iinfo->fscrypt_file); | |
1116 | ||
1117 | if (size == round_up(fsize, CEPH_FSCRYPT_BLOCK_SIZE)) { | |
1118 | size = fsize; | |
1119 | } else { | |
38d46409 XL |
1120 | pr_warn_client(cl, |
1121 | "fscrypt size mismatch: size=%llu fscrypt_file=%llu, discarding fscrypt_file size.\n", | |
16be62fc JL |
1122 | info->size, size); |
1123 | } | |
1124 | } | |
1125 | ||
f98a128a YZ |
1126 | queue_trunc = ceph_fill_file_size(inode, issued, |
1127 | le32_to_cpu(info->truncate_seq), | |
1128 | le64_to_cpu(info->truncate_size), | |
16be62fc | 1129 | size); |
f98a128a YZ |
1130 | /* only update max_size on auth cap */ |
1131 | if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && | |
1132 | ci->i_max_size != le64_to_cpu(info->max_size)) { | |
38d46409 XL |
1133 | doutc(cl, "max_size %lld -> %llu\n", |
1134 | ci->i_max_size, le64_to_cpu(info->max_size)); | |
f98a128a YZ |
1135 | ci->i_max_size = le64_to_cpu(info->max_size); |
1136 | } | |
1137 | } | |
355da1eb | 1138 | |
49a9f4f6 YZ |
1139 | /* layout and rstat are not tracked by capability, update them if |
1140 | * the inode info is from auth mds */ | |
1141 | if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) { | |
1142 | if (S_ISDIR(inode->i_mode)) { | |
1143 | ci->i_dir_layout = iinfo->dir_layout; | |
1144 | ci->i_rbytes = le64_to_cpu(info->rbytes); | |
1145 | ci->i_rfiles = le64_to_cpu(info->rfiles); | |
1146 | ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); | |
08796873 | 1147 | ci->i_dir_pin = iinfo->dir_pin; |
e7f72952 | 1148 | ci->i_rsnaps = iinfo->rsnaps; |
9bbeab41 | 1149 | ceph_decode_timespec64(&ci->i_rctime, &info->rctime); |
49a9f4f6 YZ |
1150 | } |
1151 | } | |
1152 | ||
355da1eb SW |
1153 | /* xattrs */ |
1154 | /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ | |
508b32d8 | 1155 | if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && |
355da1eb SW |
1156 | le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { |
1157 | if (ci->i_xattrs.blob) | |
af8a85a4 | 1158 | old_blob = ci->i_xattrs.blob; |
355da1eb SW |
1159 | ci->i_xattrs.blob = xattr_blob; |
1160 | if (xattr_blob) | |
1161 | memcpy(ci->i_xattrs.blob->vec.iov_base, | |
1162 | iinfo->xattr_data, iinfo->xattr_len); | |
1163 | ci->i_xattrs.version = le64_to_cpu(info->xattr_version); | |
7221fe4c | 1164 | ceph_forget_all_cached_acls(inode); |
ac6713cc | 1165 | ceph_security_invalidate_secctx(inode); |
a6424e48 | 1166 | xattr_blob = NULL; |
355da1eb SW |
1167 | } |
1168 | ||
ffdeec7a | 1169 | /* finally update i_version */ |
aae1a442 YZ |
1170 | if (le64_to_cpu(info->version) > ci->i_version) |
1171 | ci->i_version = le64_to_cpu(info->version); | |
ffdeec7a | 1172 | |
355da1eb | 1173 | inode->i_mapping->a_ops = &ceph_aops; |
355da1eb SW |
1174 | |
1175 | switch (inode->i_mode & S_IFMT) { | |
1176 | case S_IFIFO: | |
1177 | case S_IFBLK: | |
1178 | case S_IFCHR: | |
1179 | case S_IFSOCK: | |
5ba72e60 | 1180 | inode->i_blkbits = PAGE_SHIFT; |
ed94f87c | 1181 | init_special_inode(inode, inode->i_mode, rdev); |
355da1eb SW |
1182 | inode->i_op = &ceph_file_iops; |
1183 | break; | |
1184 | case S_IFREG: | |
1185 | inode->i_op = &ceph_file_iops; | |
1186 | inode->i_fop = &ceph_file_fops; | |
1187 | break; | |
1188 | case S_IFLNK: | |
355da1eb | 1189 | if (!ci->i_symlink) { |
810339ec | 1190 | u32 symlen = iinfo->symlink_len; |
355da1eb SW |
1191 | char *sym; |
1192 | ||
be655596 | 1193 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 1194 | |
79f2f6ad JL |
1195 | if (IS_ENCRYPTED(inode)) { |
1196 | if (symlen != i_size_read(inode)) | |
38d46409 XL |
1197 | pr_err_client(cl, |
1198 | "%p %llx.%llx BAD symlink size %lld\n", | |
1199 | inode, ceph_vinop(inode), | |
79f2f6ad JL |
1200 | i_size_read(inode)); |
1201 | ||
38d46409 | 1202 | err = decode_encrypted_symlink(mdsc, iinfo->symlink, |
79f2f6ad JL |
1203 | symlen, (u8 **)&sym); |
1204 | if (err < 0) { | |
38d46409 XL |
1205 | pr_err_client(cl, |
1206 | "decoding encrypted symlink failed: %d\n", | |
1207 | err); | |
79f2f6ad JL |
1208 | goto out; |
1209 | } | |
1210 | symlen = err; | |
224a7542 YZ |
1211 | i_size_write(inode, symlen); |
1212 | inode->i_blocks = calc_inode_blocks(symlen); | |
79f2f6ad JL |
1213 | } else { |
1214 | if (symlen != i_size_read(inode)) { | |
38d46409 XL |
1215 | pr_err_client(cl, |
1216 | "%p %llx.%llx BAD symlink size %lld\n", | |
1217 | inode, ceph_vinop(inode), | |
79f2f6ad JL |
1218 | i_size_read(inode)); |
1219 | i_size_write(inode, symlen); | |
1220 | inode->i_blocks = calc_inode_blocks(symlen); | |
1221 | } | |
810339ec | 1222 | |
79f2f6ad JL |
1223 | err = -ENOMEM; |
1224 | sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); | |
1225 | if (!sym) | |
1226 | goto out; | |
1227 | } | |
355da1eb | 1228 | |
be655596 | 1229 | spin_lock(&ci->i_ceph_lock); |
355da1eb SW |
1230 | if (!ci->i_symlink) |
1231 | ci->i_symlink = sym; | |
1232 | else | |
1233 | kfree(sym); /* lost a race */ | |
1234 | } | |
79f2f6ad JL |
1235 | |
1236 | if (IS_ENCRYPTED(inode)) { | |
1237 | /* | |
1238 | * Encrypted symlinks need to be decrypted before we can | |
1239 | * cache their targets in i_link. Don't touch it here. | |
1240 | */ | |
1241 | inode->i_op = &ceph_encrypted_symlink_iops; | |
1242 | } else { | |
1243 | inode->i_link = ci->i_symlink; | |
1244 | inode->i_op = &ceph_symlink_iops; | |
1245 | } | |
355da1eb SW |
1246 | break; |
1247 | case S_IFDIR: | |
1248 | inode->i_op = &ceph_dir_iops; | |
1249 | inode->i_fop = &ceph_dir_fops; | |
355da1eb SW |
1250 | break; |
1251 | default: | |
38d46409 XL |
1252 | pr_err_client(cl, "%p %llx.%llx BAD mode 0%o\n", inode, |
1253 | ceph_vinop(inode), inode->i_mode); | |
355da1eb SW |
1254 | } |
1255 | ||
355da1eb | 1256 | /* were we issued a capability? */ |
2af54a72 | 1257 | if (info_caps) { |
355da1eb SW |
1258 | if (ceph_snap(inode) == CEPH_NOSNAP) { |
1259 | ceph_add_cap(inode, session, | |
1260 | le64_to_cpu(info->cap.cap_id), | |
135e671e | 1261 | info_caps, |
355da1eb SW |
1262 | le32_to_cpu(info->cap.wanted), |
1263 | le32_to_cpu(info->cap.seq), | |
1264 | le32_to_cpu(info->cap.mseq), | |
1265 | le64_to_cpu(info->cap.realm), | |
d9df2783 | 1266 | info->cap.flags, &new_cap); |
2f92b3d0 YZ |
1267 | |
1268 | /* set dir completion flag? */ | |
1269 | if (S_ISDIR(inode->i_mode) && | |
1270 | ci->i_files == 0 && ci->i_subdirs == 0 && | |
2af54a72 | 1271 | (info_caps & CEPH_CAP_FILE_SHARED) && |
2f92b3d0 YZ |
1272 | (issued & CEPH_CAP_FILE_EXCL) == 0 && |
1273 | !__ceph_dir_is_complete(ci)) { | |
38d46409 XL |
1274 | doutc(cl, " marking %p complete (empty)\n", |
1275 | inode); | |
fdd4e158 | 1276 | i_size_write(inode, 0); |
2f92b3d0 | 1277 | __ceph_dir_set_complete(ci, |
fdd4e158 YZ |
1278 | atomic64_read(&ci->i_release_count), |
1279 | atomic64_read(&ci->i_ordered_count)); | |
2f92b3d0 YZ |
1280 | } |
1281 | ||
d9df2783 | 1282 | wake = true; |
355da1eb | 1283 | } else { |
38d46409 XL |
1284 | doutc(cl, " %p got snap_caps %s\n", inode, |
1285 | ceph_cap_string(info_caps)); | |
2af54a72 | 1286 | ci->i_snap_caps |= info_caps; |
355da1eb SW |
1287 | } |
1288 | } | |
31c542a1 YZ |
1289 | |
1290 | if (iinfo->inline_version > 0 && | |
1291 | iinfo->inline_version >= ci->i_inline_version) { | |
1292 | int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; | |
1293 | ci->i_inline_version = iinfo->inline_version; | |
48490776 | 1294 | if (ceph_has_inline_data(ci) && |
2af54a72 | 1295 | (locked_page || (info_caps & cache_caps))) |
31c542a1 YZ |
1296 | fill_inline = true; |
1297 | } | |
1298 | ||
719a2514 YZ |
1299 | if (cap_fmode >= 0) { |
1300 | if (!info_caps) | |
38d46409 XL |
1301 | pr_warn_client(cl, "mds issued no caps on %llx.%llx\n", |
1302 | ceph_vinop(inode)); | |
719a2514 YZ |
1303 | __ceph_touch_fmode(ci, mdsc, cap_fmode); |
1304 | } | |
1305 | ||
be655596 | 1306 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 1307 | |
400e1286 JL |
1308 | ceph_fscache_register_inode_cookie(inode); |
1309 | ||
31c542a1 | 1310 | if (fill_inline) |
01deead0 | 1311 | ceph_fill_inline_data(inode, locked_page, |
31c542a1 YZ |
1312 | iinfo->inline_data, iinfo->inline_len); |
1313 | ||
d9df2783 YZ |
1314 | if (wake) |
1315 | wake_up_all(&ci->i_cap_wq); | |
1316 | ||
355da1eb SW |
1317 | /* queue truncate if we saw i_size decrease */ |
1318 | if (queue_trunc) | |
3c6f6b79 | 1319 | ceph_queue_vmtruncate(inode); |
355da1eb SW |
1320 | |
1321 | /* populate frag tree */ | |
3e7fbe9c YZ |
1322 | if (S_ISDIR(inode->i_mode)) |
1323 | ceph_fill_fragtree(inode, &info->fragtree, dirinfo); | |
355da1eb SW |
1324 | |
1325 | /* update delegation info? */ | |
1326 | if (dirinfo) | |
1327 | ceph_fill_dirfrag(inode, dirinfo); | |
1328 | ||
1329 | err = 0; | |
355da1eb | 1330 | out: |
d9df2783 YZ |
1331 | if (new_cap) |
1332 | ceph_put_cap(mdsc, new_cap); | |
af8a85a4 LH |
1333 | ceph_buffer_put(old_blob); |
1334 | ceph_buffer_put(xattr_blob); | |
779fe0fb | 1335 | ceph_put_string(pool_ns); |
355da1eb SW |
1336 | return err; |
1337 | } | |
1338 | ||
1339 | /* | |
543212b3 | 1340 | * caller should hold session s_mutex and dentry->d_lock. |
355da1eb | 1341 | */ |
543212b3 YZ |
1342 | static void __update_dentry_lease(struct inode *dir, struct dentry *dentry, |
1343 | struct ceph_mds_reply_lease *lease, | |
1344 | struct ceph_mds_session *session, | |
1345 | unsigned long from_time, | |
1346 | struct ceph_mds_session **old_lease_session) | |
355da1eb | 1347 | { |
38d46409 | 1348 | struct ceph_client *cl = ceph_inode_to_client(dir); |
355da1eb | 1349 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
f5e17aed | 1350 | unsigned mask = le16_to_cpu(lease->mask); |
355da1eb SW |
1351 | long unsigned duration = le32_to_cpu(lease->duration_ms); |
1352 | long unsigned ttl = from_time + (duration * HZ) / 1000; | |
1353 | long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; | |
f5d55f03 | 1354 | |
38d46409 | 1355 | doutc(cl, "%p duration %lu ms ttl %lu\n", dentry, duration, ttl); |
355da1eb | 1356 | |
18fc8abd AV |
1357 | /* only track leases on regular dentries */ |
1358 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
543212b3 | 1359 | return; |
18fc8abd | 1360 | |
f5e17aed JL |
1361 | if (mask & CEPH_LEASE_PRIMARY_LINK) |
1362 | di->flags |= CEPH_DENTRY_PRIMARY_LINK; | |
1363 | else | |
1364 | di->flags &= ~CEPH_DENTRY_PRIMARY_LINK; | |
1365 | ||
97aeb6bf | 1366 | di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen); |
f5e17aed | 1367 | if (!(mask & CEPH_LEASE_VALID)) { |
37c4efc1 | 1368 | __ceph_dentry_dir_lease_touch(di); |
543212b3 | 1369 | return; |
37c4efc1 | 1370 | } |
355da1eb | 1371 | |
52d60f8e | 1372 | if (di->lease_gen == atomic_read(&session->s_cap_gen) && |
9b16f03c | 1373 | time_before(ttl, di->time)) |
543212b3 | 1374 | return; /* we already have a newer lease. */ |
355da1eb | 1375 | |
481f001f | 1376 | if (di->lease_session && di->lease_session != session) { |
543212b3 | 1377 | *old_lease_session = di->lease_session; |
481f001f YZ |
1378 | di->lease_session = NULL; |
1379 | } | |
355da1eb | 1380 | |
355da1eb SW |
1381 | if (!di->lease_session) |
1382 | di->lease_session = ceph_get_mds_session(session); | |
52d60f8e | 1383 | di->lease_gen = atomic_read(&session->s_cap_gen); |
355da1eb SW |
1384 | di->lease_seq = le32_to_cpu(lease->seq); |
1385 | di->lease_renew_after = half_ttl; | |
1386 | di->lease_renew_from = 0; | |
9b16f03c | 1387 | di->time = ttl; |
37c4efc1 YZ |
1388 | |
1389 | __ceph_dentry_lease_touch(di); | |
543212b3 YZ |
1390 | } |
1391 | ||
1392 | static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry, | |
1393 | struct ceph_mds_reply_lease *lease, | |
1394 | struct ceph_mds_session *session, | |
1395 | unsigned long from_time) | |
1396 | { | |
1397 | struct ceph_mds_session *old_lease_session = NULL; | |
1398 | spin_lock(&dentry->d_lock); | |
1399 | __update_dentry_lease(dir, dentry, lease, session, from_time, | |
1400 | &old_lease_session); | |
1401 | spin_unlock(&dentry->d_lock); | |
7e65624d | 1402 | ceph_put_mds_session(old_lease_session); |
543212b3 YZ |
1403 | } |
1404 | ||
1405 | /* | |
1406 | * update dentry lease without having parent inode locked | |
1407 | */ | |
1408 | static void update_dentry_lease_careful(struct dentry *dentry, | |
1409 | struct ceph_mds_reply_lease *lease, | |
1410 | struct ceph_mds_session *session, | |
1411 | unsigned long from_time, | |
1412 | char *dname, u32 dname_len, | |
1413 | struct ceph_vino *pdvino, | |
1414 | struct ceph_vino *ptvino) | |
1415 | ||
1416 | { | |
1417 | struct inode *dir; | |
1418 | struct ceph_mds_session *old_lease_session = NULL; | |
1419 | ||
1420 | spin_lock(&dentry->d_lock); | |
1421 | /* make sure dentry's name matches target */ | |
1422 | if (dentry->d_name.len != dname_len || | |
1423 | memcmp(dentry->d_name.name, dname, dname_len)) | |
1424 | goto out_unlock; | |
1425 | ||
1426 | dir = d_inode(dentry->d_parent); | |
1427 | /* make sure parent matches dvino */ | |
1428 | if (!ceph_ino_compare(dir, pdvino)) | |
1429 | goto out_unlock; | |
1430 | ||
1431 | /* make sure dentry's inode matches target. NULL ptvino means that | |
1432 | * we expect a negative dentry */ | |
1433 | if (ptvino) { | |
1434 | if (d_really_is_negative(dentry)) | |
1435 | goto out_unlock; | |
1436 | if (!ceph_ino_compare(d_inode(dentry), ptvino)) | |
1437 | goto out_unlock; | |
1438 | } else { | |
1439 | if (d_really_is_positive(dentry)) | |
1440 | goto out_unlock; | |
1441 | } | |
1442 | ||
1443 | __update_dentry_lease(dir, dentry, lease, session, | |
1444 | from_time, &old_lease_session); | |
355da1eb SW |
1445 | out_unlock: |
1446 | spin_unlock(&dentry->d_lock); | |
7e65624d | 1447 | ceph_put_mds_session(old_lease_session); |
355da1eb SW |
1448 | } |
1449 | ||
1450 | /* | |
1451 | * splice a dentry to an inode. | |
810313c5 | 1452 | * caller must hold directory i_rwsem for this to be safe. |
355da1eb | 1453 | */ |
2bf996ac | 1454 | static int splice_dentry(struct dentry **pdn, struct inode *in) |
355da1eb | 1455 | { |
38d46409 | 1456 | struct ceph_client *cl = ceph_inode_to_client(in); |
2bf996ac | 1457 | struct dentry *dn = *pdn; |
355da1eb SW |
1458 | struct dentry *realdn; |
1459 | ||
2b0143b5 | 1460 | BUG_ON(d_inode(dn)); |
1cd3935b | 1461 | |
5495c2d0 YZ |
1462 | if (S_ISDIR(in->i_mode)) { |
1463 | /* If inode is directory, d_splice_alias() below will remove | |
1464 | * 'realdn' from its origin parent. We need to ensure that | |
1465 | * origin parent's readdir cache will not reference 'realdn' | |
1466 | */ | |
1467 | realdn = d_find_any_alias(in); | |
1468 | if (realdn) { | |
1469 | struct ceph_dentry_info *di = ceph_dentry(realdn); | |
1470 | spin_lock(&realdn->d_lock); | |
1471 | ||
1472 | realdn->d_op->d_prune(realdn); | |
1473 | ||
1474 | di->time = jiffies; | |
1475 | di->lease_shared_gen = 0; | |
1476 | di->offset = 0; | |
1477 | ||
1478 | spin_unlock(&realdn->d_lock); | |
1479 | dput(realdn); | |
1480 | } | |
1481 | } | |
1482 | ||
355da1eb SW |
1483 | /* dn must be unhashed */ |
1484 | if (!d_unhashed(dn)) | |
1485 | d_drop(dn); | |
41d28bca | 1486 | realdn = d_splice_alias(in, dn); |
355da1eb | 1487 | if (IS_ERR(realdn)) { |
38d46409 XL |
1488 | pr_err_client(cl, "error %ld %p inode %p ino %llx.%llx\n", |
1489 | PTR_ERR(realdn), dn, in, ceph_vinop(in)); | |
2bf996ac YZ |
1490 | return PTR_ERR(realdn); |
1491 | } | |
1492 | ||
1493 | if (realdn) { | |
38d46409 XL |
1494 | doutc(cl, "dn %p (%d) spliced with %p (%d) inode %p ino %llx.%llx\n", |
1495 | dn, d_count(dn), realdn, d_count(realdn), | |
1496 | d_inode(realdn), ceph_vinop(d_inode(realdn))); | |
355da1eb | 1497 | dput(dn); |
2bf996ac | 1498 | *pdn = realdn; |
355da1eb SW |
1499 | } else { |
1500 | BUG_ON(!ceph_dentry(dn)); | |
38d46409 XL |
1501 | doutc(cl, "dn %p attached to %p ino %llx.%llx\n", dn, |
1502 | d_inode(dn), ceph_vinop(d_inode(dn))); | |
355da1eb | 1503 | } |
2bf996ac | 1504 | return 0; |
355da1eb SW |
1505 | } |
1506 | ||
1507 | /* | |
1508 | * Incorporate results into the local cache. This is either just | |
1509 | * one inode, or a directory, dentry, and possibly linked-to inode (e.g., | |
1510 | * after a lookup). | |
1511 | * | |
1512 | * A reply may contain | |
1513 | * a directory inode along with a dentry. | |
1514 | * and/or a target inode | |
1515 | * | |
1516 | * Called with snap_rwsem (read). | |
1517 | */ | |
f5a03b08 | 1518 | int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) |
355da1eb | 1519 | { |
f5a03b08 | 1520 | struct ceph_mds_session *session = req->r_session; |
355da1eb SW |
1521 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; |
1522 | struct inode *in = NULL; | |
f5d55f03 | 1523 | struct ceph_vino tvino, dvino; |
5995d90d | 1524 | struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb); |
38d46409 | 1525 | struct ceph_client *cl = fsc->client; |
355da1eb SW |
1526 | int err = 0; |
1527 | ||
38d46409 XL |
1528 | doutc(cl, "%p is_dentry %d is_target %d\n", req, |
1529 | rinfo->head->is_dentry, rinfo->head->is_target); | |
355da1eb | 1530 | |
355da1eb | 1531 | if (!rinfo->head->is_target && !rinfo->head->is_dentry) { |
38d46409 | 1532 | doutc(cl, "reply is empty!\n"); |
3dd69aab | 1533 | if (rinfo->head->result == 0 && req->r_parent) |
167c9e35 | 1534 | ceph_invalidate_dir_request(req); |
355da1eb SW |
1535 | return 0; |
1536 | } | |
1537 | ||
1538 | if (rinfo->head->is_dentry) { | |
3dd69aab | 1539 | struct inode *dir = req->r_parent; |
5b1daecd | 1540 | |
6c5e50fa | 1541 | if (dir) { |
966c7160 JL |
1542 | err = ceph_fill_inode(dir, NULL, &rinfo->diri, |
1543 | rinfo->dirfrag, session, -1, | |
1544 | &req->r_caps_reservation); | |
6c5e50fa | 1545 | if (err < 0) |
19913b4e | 1546 | goto done; |
6c5e50fa SW |
1547 | } else { |
1548 | WARN_ON_ONCE(1); | |
1549 | } | |
19913b4e | 1550 | |
74c9e6bf YZ |
1551 | if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME && |
1552 | test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && | |
1553 | !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { | |
85529096 | 1554 | bool is_nokey = false; |
19913b4e YZ |
1555 | struct qstr dname; |
1556 | struct dentry *dn, *parent; | |
85529096 JL |
1557 | struct fscrypt_str oname = FSTR_INIT(NULL, 0); |
1558 | struct ceph_fname fname = { .dir = dir, | |
1559 | .name = rinfo->dname, | |
1560 | .ctext = rinfo->altname, | |
1561 | .name_len = rinfo->dname_len, | |
1562 | .ctext_len = rinfo->altname_len }; | |
19913b4e YZ |
1563 | |
1564 | BUG_ON(!rinfo->head->is_target); | |
1565 | BUG_ON(req->r_dentry); | |
1566 | ||
1567 | parent = d_find_any_alias(dir); | |
1568 | BUG_ON(!parent); | |
1569 | ||
85529096 JL |
1570 | err = ceph_fname_alloc_buffer(dir, &oname); |
1571 | if (err < 0) { | |
1572 | dput(parent); | |
1573 | goto done; | |
1574 | } | |
1575 | ||
1576 | err = ceph_fname_to_usr(&fname, NULL, &oname, &is_nokey); | |
1577 | if (err < 0) { | |
1578 | dput(parent); | |
1579 | ceph_fname_free_buffer(dir, &oname); | |
1580 | goto done; | |
1581 | } | |
1582 | dname.name = oname.name; | |
1583 | dname.len = oname.len; | |
8387ff25 | 1584 | dname.hash = full_name_hash(parent, dname.name, dname.len); |
f5d55f03 JL |
1585 | tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); |
1586 | tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); | |
19913b4e YZ |
1587 | retry_lookup: |
1588 | dn = d_lookup(parent, &dname); | |
38d46409 XL |
1589 | doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n", |
1590 | parent, dname.len, dname.name, dn); | |
19913b4e YZ |
1591 | |
1592 | if (!dn) { | |
1593 | dn = d_alloc(parent, &dname); | |
38d46409 XL |
1594 | doutc(cl, "d_alloc %p '%.*s' = %p\n", parent, |
1595 | dname.len, dname.name, dn); | |
d37b1d99 | 1596 | if (!dn) { |
19913b4e | 1597 | dput(parent); |
85529096 | 1598 | ceph_fname_free_buffer(dir, &oname); |
19913b4e YZ |
1599 | err = -ENOMEM; |
1600 | goto done; | |
1601 | } | |
85529096 JL |
1602 | if (is_nokey) { |
1603 | spin_lock(&dn->d_lock); | |
1604 | dn->d_flags |= DCACHE_NOKEY_NAME; | |
1605 | spin_unlock(&dn->d_lock); | |
1606 | } | |
ad5cb123 | 1607 | err = 0; |
2b0143b5 | 1608 | } else if (d_really_is_positive(dn) && |
f5d55f03 JL |
1609 | (ceph_ino(d_inode(dn)) != tvino.ino || |
1610 | ceph_snap(d_inode(dn)) != tvino.snap)) { | |
38d46409 XL |
1611 | doutc(cl, " dn %p points to wrong inode %p\n", |
1612 | dn, d_inode(dn)); | |
933ad2c9 | 1613 | ceph_dir_clear_ordered(dir); |
19913b4e YZ |
1614 | d_delete(dn); |
1615 | dput(dn); | |
1616 | goto retry_lookup; | |
1617 | } | |
85529096 | 1618 | ceph_fname_free_buffer(dir, &oname); |
19913b4e YZ |
1619 | |
1620 | req->r_dentry = dn; | |
1621 | dput(parent); | |
1622 | } | |
5b1daecd SW |
1623 | } |
1624 | ||
86b58d13 | 1625 | if (rinfo->head->is_target) { |
bca9fc14 JL |
1626 | /* Should be filled in by handle_reply */ |
1627 | BUG_ON(!req->r_target_inode); | |
86b58d13 | 1628 | |
bca9fc14 | 1629 | in = req->r_target_inode; |
966c7160 JL |
1630 | err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti, |
1631 | NULL, session, | |
bc2de10d | 1632 | (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && |
3bb48b41 | 1633 | !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) && |
57c21994 | 1634 | rinfo->head->result == 0) ? req->r_fmode : -1, |
86b58d13 YZ |
1635 | &req->r_caps_reservation); |
1636 | if (err < 0) { | |
38d46409 XL |
1637 | pr_err_client(cl, "badness %p %llx.%llx\n", in, |
1638 | ceph_vinop(in)); | |
bca9fc14 | 1639 | req->r_target_inode = NULL; |
893e456b JL |
1640 | if (in->i_state & I_NEW) |
1641 | discard_new_inode(in); | |
68cbb805 JL |
1642 | else |
1643 | iput(in); | |
86b58d13 YZ |
1644 | goto done; |
1645 | } | |
893e456b JL |
1646 | if (in->i_state & I_NEW) |
1647 | unlock_new_inode(in); | |
86b58d13 YZ |
1648 | } |
1649 | ||
9358c6d4 SW |
1650 | /* |
1651 | * ignore null lease/binding on snapdir ENOENT, or else we | |
1652 | * will have trouble splicing in the virtual snapdir later | |
1653 | */ | |
3dd69aab JL |
1654 | if (rinfo->head->is_dentry && |
1655 | !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && | |
1656 | test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && | |
9358c6d4 | 1657 | (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, |
3d14c5d2 | 1658 | fsc->mount_options->snapdir_name, |
9358c6d4 | 1659 | req->r_dentry->d_name.len))) { |
355da1eb SW |
1660 | /* |
1661 | * lookup link rename : null -> possibly existing inode | |
1662 | * mknod symlink mkdir : null -> new inode | |
1663 | * unlink : linked -> null | |
1664 | */ | |
3dd69aab | 1665 | struct inode *dir = req->r_parent; |
355da1eb SW |
1666 | struct dentry *dn = req->r_dentry; |
1667 | bool have_dir_cap, have_lease; | |
1668 | ||
1669 | BUG_ON(!dn); | |
1670 | BUG_ON(!dir); | |
2b0143b5 | 1671 | BUG_ON(d_inode(dn->d_parent) != dir); |
f5d55f03 JL |
1672 | |
1673 | dvino.ino = le64_to_cpu(rinfo->diri.in->ino); | |
1674 | dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); | |
1675 | ||
1676 | BUG_ON(ceph_ino(dir) != dvino.ino); | |
1677 | BUG_ON(ceph_snap(dir) != dvino.snap); | |
355da1eb | 1678 | |
355da1eb SW |
1679 | /* do we have a lease on the whole dir? */ |
1680 | have_dir_cap = | |
1681 | (le32_to_cpu(rinfo->diri.in->cap.caps) & | |
1682 | CEPH_CAP_FILE_SHARED); | |
1683 | ||
1684 | /* do we have a dn lease? */ | |
1685 | have_lease = have_dir_cap || | |
2f90b852 | 1686 | le32_to_cpu(rinfo->dlease->duration_ms); |
355da1eb | 1687 | if (!have_lease) |
38d46409 | 1688 | doutc(cl, "no dentry lease or dir cap\n"); |
355da1eb SW |
1689 | |
1690 | /* rename? */ | |
1691 | if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { | |
0a8a70f9 YZ |
1692 | struct inode *olddir = req->r_old_dentry_dir; |
1693 | BUG_ON(!olddir); | |
1694 | ||
38d46409 XL |
1695 | doutc(cl, " src %p '%pd' dst %p '%pd'\n", |
1696 | req->r_old_dentry, req->r_old_dentry, dn, dn); | |
1697 | doutc(cl, "doing d_move %p -> %p\n", req->r_old_dentry, dn); | |
c10f5e12 | 1698 | |
fdd4e158 YZ |
1699 | /* d_move screws up sibling dentries' offsets */ |
1700 | ceph_dir_clear_ordered(dir); | |
1701 | ceph_dir_clear_ordered(olddir); | |
1702 | ||
355da1eb | 1703 | d_move(req->r_old_dentry, dn); |
38d46409 XL |
1704 | doutc(cl, " src %p '%pd' dst %p '%pd'\n", |
1705 | req->r_old_dentry, req->r_old_dentry, dn, dn); | |
81a6cf2d | 1706 | |
c4a29f26 SW |
1707 | /* ensure target dentry is invalidated, despite |
1708 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d SW |
1709 | ceph_invalidate_dentry_lease(dn); |
1710 | ||
38d46409 XL |
1711 | doutc(cl, "dn %p gets new offset %lld\n", |
1712 | req->r_old_dentry, | |
1713 | ceph_dentry(req->r_old_dentry)->offset); | |
81a6cf2d | 1714 | |
2bf996ac YZ |
1715 | /* swap r_dentry and r_old_dentry in case that |
1716 | * splice_dentry() gets called later. This is safe | |
1717 | * because no other place will use them */ | |
1718 | req->r_dentry = req->r_old_dentry; | |
1719 | req->r_old_dentry = dn; | |
1720 | dn = req->r_dentry; | |
355da1eb SW |
1721 | } |
1722 | ||
1723 | /* null dentry? */ | |
1724 | if (!rinfo->head->is_target) { | |
38d46409 | 1725 | doutc(cl, "null dentry\n"); |
2b0143b5 | 1726 | if (d_really_is_positive(dn)) { |
38d46409 | 1727 | doutc(cl, "d_delete %p\n", dn); |
5495c2d0 | 1728 | ceph_dir_clear_ordered(dir); |
355da1eb | 1729 | d_delete(dn); |
80d025ff JL |
1730 | } else if (have_lease) { |
1731 | if (d_unhashed(dn)) | |
f8b31710 | 1732 | d_add(dn, NULL); |
7ffe4fce XL |
1733 | } |
1734 | ||
1735 | if (!d_unhashed(dn) && have_lease) | |
543212b3 YZ |
1736 | update_dentry_lease(dir, dn, |
1737 | rinfo->dlease, session, | |
1738 | req->r_request_started); | |
355da1eb SW |
1739 | goto done; |
1740 | } | |
1741 | ||
1742 | /* attach proper inode */ | |
2b0143b5 | 1743 | if (d_really_is_negative(dn)) { |
70db4f36 | 1744 | ceph_dir_clear_ordered(dir); |
86b58d13 | 1745 | ihold(in); |
2bf996ac YZ |
1746 | err = splice_dentry(&req->r_dentry, in); |
1747 | if (err < 0) | |
355da1eb | 1748 | goto done; |
2bf996ac | 1749 | dn = req->r_dentry; /* may have spliced */ |
2b0143b5 | 1750 | } else if (d_really_is_positive(dn) && d_inode(dn) != in) { |
38d46409 XL |
1751 | doutc(cl, " %p links to %p %llx.%llx, not %llx.%llx\n", |
1752 | dn, d_inode(dn), ceph_vinop(d_inode(dn)), | |
1753 | ceph_vinop(in)); | |
200fd27c | 1754 | d_invalidate(dn); |
355da1eb | 1755 | have_lease = false; |
355da1eb SW |
1756 | } |
1757 | ||
f5d55f03 | 1758 | if (have_lease) { |
543212b3 YZ |
1759 | update_dentry_lease(dir, dn, |
1760 | rinfo->dlease, session, | |
1761 | req->r_request_started); | |
f5d55f03 | 1762 | } |
38d46409 | 1763 | doutc(cl, " final dn %p\n", dn); |
bc2de10d JL |
1764 | } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || |
1765 | req->r_op == CEPH_MDS_OP_MKSNAP) && | |
1f08529c | 1766 | test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && |
bc2de10d | 1767 | !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { |
3dd69aab | 1768 | struct inode *dir = req->r_parent; |
355da1eb SW |
1769 | |
1770 | /* fill out a snapdir LOOKUPSNAP dentry */ | |
0a8a70f9 YZ |
1771 | BUG_ON(!dir); |
1772 | BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); | |
2bf996ac | 1773 | BUG_ON(!req->r_dentry); |
38d46409 XL |
1774 | doutc(cl, " linking snapped dir %p to dn %p\n", in, |
1775 | req->r_dentry); | |
70db4f36 | 1776 | ceph_dir_clear_ordered(dir); |
86b58d13 | 1777 | ihold(in); |
2bf996ac YZ |
1778 | err = splice_dentry(&req->r_dentry, in); |
1779 | if (err < 0) | |
355da1eb | 1780 | goto done; |
543212b3 YZ |
1781 | } else if (rinfo->head->is_dentry && req->r_dentry) { |
1782 | /* parent inode is not locked, be carefull */ | |
cdde7c43 | 1783 | struct ceph_vino *ptvino = NULL; |
543212b3 YZ |
1784 | dvino.ino = le64_to_cpu(rinfo->diri.in->ino); |
1785 | dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); | |
1786 | if (rinfo->head->is_target) { | |
1787 | tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); | |
1788 | tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); | |
1789 | ptvino = &tvino; | |
cdde7c43 | 1790 | } |
543212b3 YZ |
1791 | update_dentry_lease_careful(req->r_dentry, rinfo->dlease, |
1792 | session, req->r_request_started, | |
1793 | rinfo->dname, rinfo->dname_len, | |
1794 | &dvino, ptvino); | |
355da1eb | 1795 | } |
355da1eb | 1796 | done: |
38d46409 | 1797 | doutc(cl, "done err=%d\n", err); |
355da1eb SW |
1798 | return err; |
1799 | } | |
1800 | ||
1801 | /* | |
1802 | * Prepopulate our cache with readdir results, leases, etc. | |
1803 | */ | |
79f9f99a SW |
1804 | static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, |
1805 | struct ceph_mds_session *session) | |
1806 | { | |
1807 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
38d46409 | 1808 | struct ceph_client *cl = session->s_mdsc->fsc->client; |
79f9f99a SW |
1809 | int i, err = 0; |
1810 | ||
1811 | for (i = 0; i < rinfo->dir_nr; i++) { | |
2a5beea3 | 1812 | struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; |
79f9f99a SW |
1813 | struct ceph_vino vino; |
1814 | struct inode *in; | |
1815 | int rc; | |
1816 | ||
2a5beea3 YZ |
1817 | vino.ino = le64_to_cpu(rde->inode.in->ino); |
1818 | vino.snap = le64_to_cpu(rde->inode.in->snapid); | |
79f9f99a | 1819 | |
ec9595c0 | 1820 | in = ceph_get_inode(req->r_dentry->d_sb, vino, NULL); |
79f9f99a SW |
1821 | if (IS_ERR(in)) { |
1822 | err = PTR_ERR(in); | |
38d46409 | 1823 | doutc(cl, "badness got %d\n", err); |
79f9f99a SW |
1824 | continue; |
1825 | } | |
966c7160 JL |
1826 | rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, |
1827 | -1, &req->r_caps_reservation); | |
79f9f99a | 1828 | if (rc < 0) { |
38d46409 XL |
1829 | pr_err_client(cl, "inode badness on %p got %d\n", in, |
1830 | rc); | |
79f9f99a | 1831 | err = rc; |
893e456b JL |
1832 | if (in->i_state & I_NEW) { |
1833 | ihold(in); | |
1834 | discard_new_inode(in); | |
1835 | } | |
1836 | } else if (in->i_state & I_NEW) { | |
1837 | unlock_new_inode(in); | |
79f9f99a | 1838 | } |
893e456b | 1839 | |
23c2c76e | 1840 | iput(in); |
79f9f99a SW |
1841 | } |
1842 | ||
1843 | return err; | |
1844 | } | |
1845 | ||
fdd4e158 YZ |
1846 | void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl) |
1847 | { | |
1848 | if (ctl->page) { | |
1849 | kunmap(ctl->page); | |
09cbfeaf | 1850 | put_page(ctl->page); |
fdd4e158 YZ |
1851 | ctl->page = NULL; |
1852 | } | |
1853 | } | |
1854 | ||
1855 | static int fill_readdir_cache(struct inode *dir, struct dentry *dn, | |
1856 | struct ceph_readdir_cache_control *ctl, | |
1857 | struct ceph_mds_request *req) | |
1858 | { | |
38d46409 | 1859 | struct ceph_client *cl = ceph_inode_to_client(dir); |
fdd4e158 | 1860 | struct ceph_inode_info *ci = ceph_inode(dir); |
09cbfeaf | 1861 | unsigned nsize = PAGE_SIZE / sizeof(struct dentry*); |
fdd4e158 YZ |
1862 | unsigned idx = ctl->index % nsize; |
1863 | pgoff_t pgoff = ctl->index / nsize; | |
1864 | ||
5e425300 | 1865 | if (!ctl->page || pgoff != ctl->page->index) { |
fdd4e158 | 1866 | ceph_readdir_cache_release(ctl); |
af5e5eb5 YZ |
1867 | if (idx == 0) |
1868 | ctl->page = grab_cache_page(&dir->i_data, pgoff); | |
1869 | else | |
1870 | ctl->page = find_lock_page(&dir->i_data, pgoff); | |
fdd4e158 YZ |
1871 | if (!ctl->page) { |
1872 | ctl->index = -1; | |
af5e5eb5 | 1873 | return idx == 0 ? -ENOMEM : 0; |
fdd4e158 YZ |
1874 | } |
1875 | /* reading/filling the cache are serialized by | |
810313c5 | 1876 | * i_rwsem, no need to use page lock */ |
fdd4e158 YZ |
1877 | unlock_page(ctl->page); |
1878 | ctl->dentries = kmap(ctl->page); | |
af5e5eb5 | 1879 | if (idx == 0) |
09cbfeaf | 1880 | memset(ctl->dentries, 0, PAGE_SIZE); |
fdd4e158 YZ |
1881 | } |
1882 | ||
1883 | if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) && | |
1884 | req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) { | |
38d46409 | 1885 | doutc(cl, "dn %p idx %d\n", dn, ctl->index); |
fdd4e158 YZ |
1886 | ctl->dentries[idx] = dn; |
1887 | ctl->index++; | |
1888 | } else { | |
38d46409 | 1889 | doutc(cl, "disable readdir cache\n"); |
fdd4e158 YZ |
1890 | ctl->index = -1; |
1891 | } | |
1892 | return 0; | |
1893 | } | |
1894 | ||
355da1eb SW |
1895 | int ceph_readdir_prepopulate(struct ceph_mds_request *req, |
1896 | struct ceph_mds_session *session) | |
1897 | { | |
1898 | struct dentry *parent = req->r_dentry; | |
af9ffa6d XL |
1899 | struct inode *inode = d_inode(parent); |
1900 | struct ceph_inode_info *ci = ceph_inode(inode); | |
355da1eb | 1901 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; |
38d46409 | 1902 | struct ceph_client *cl = session->s_mdsc->fsc->client; |
355da1eb SW |
1903 | struct qstr dname; |
1904 | struct dentry *dn; | |
1905 | struct inode *in; | |
315f2408 | 1906 | int err = 0, skipped = 0, ret, i; |
0f51a983 | 1907 | u32 frag = le32_to_cpu(req->r_args.readdir.frag); |
f3c4ebe6 YZ |
1908 | u32 last_hash = 0; |
1909 | u32 fpos_offset; | |
fdd4e158 YZ |
1910 | struct ceph_readdir_cache_control cache_ctl = {}; |
1911 | ||
bc2de10d | 1912 | if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) |
fdd4e158 | 1913 | return readdir_prepopulate_inodes_only(req, session); |
81c6aea5 | 1914 | |
79162547 YZ |
1915 | if (rinfo->hash_order) { |
1916 | if (req->r_path2) { | |
1917 | last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, | |
1918 | req->r_path2, | |
1919 | strlen(req->r_path2)); | |
1920 | last_hash = ceph_frag_value(last_hash); | |
1921 | } else if (rinfo->offset_hash) { | |
1922 | /* mds understands offset_hash */ | |
1923 | WARN_ON_ONCE(req->r_readdir_offset != 2); | |
0f51a983 | 1924 | last_hash = le32_to_cpu(req->r_args.readdir.offset_hash); |
79162547 | 1925 | } |
f3c4ebe6 YZ |
1926 | } |
1927 | ||
81c6aea5 YZ |
1928 | if (rinfo->dir_dir && |
1929 | le32_to_cpu(rinfo->dir_dir->frag) != frag) { | |
38d46409 XL |
1930 | doutc(cl, "got new frag %x -> %x\n", frag, |
1931 | le32_to_cpu(rinfo->dir_dir->frag)); | |
81c6aea5 | 1932 | frag = le32_to_cpu(rinfo->dir_dir->frag); |
f3c4ebe6 | 1933 | if (!rinfo->hash_order) |
fdd4e158 | 1934 | req->r_readdir_offset = 2; |
81c6aea5 | 1935 | } |
355da1eb SW |
1936 | |
1937 | if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { | |
38d46409 XL |
1938 | doutc(cl, "%d items under SNAPDIR dn %p\n", |
1939 | rinfo->dir_nr, parent); | |
355da1eb | 1940 | } else { |
38d46409 | 1941 | doutc(cl, "%d items under dn %p\n", rinfo->dir_nr, parent); |
355da1eb | 1942 | if (rinfo->dir_dir) |
2b0143b5 | 1943 | ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir); |
355da1eb | 1944 | |
8d45b911 YZ |
1945 | if (ceph_frag_is_leftmost(frag) && |
1946 | req->r_readdir_offset == 2 && | |
1947 | !(rinfo->hash_order && last_hash)) { | |
1948 | /* note dir version at start of readdir so we can | |
1949 | * tell if any dentries get dropped */ | |
1950 | req->r_dir_release_cnt = | |
1951 | atomic64_read(&ci->i_release_count); | |
1952 | req->r_dir_ordered_cnt = | |
1953 | atomic64_read(&ci->i_ordered_count); | |
1954 | req->r_readdir_cache_idx = 0; | |
1955 | } | |
fdd4e158 YZ |
1956 | } |
1957 | ||
1958 | cache_ctl.index = req->r_readdir_cache_idx; | |
f3c4ebe6 | 1959 | fpos_offset = req->r_readdir_offset; |
fdd4e158 | 1960 | |
86b58d13 | 1961 | /* FIXME: release caps/leases if error occurs */ |
355da1eb | 1962 | for (i = 0; i < rinfo->dir_nr; i++) { |
2a5beea3 | 1963 | struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; |
543212b3 | 1964 | struct ceph_vino tvino; |
355da1eb | 1965 | |
2a5beea3 YZ |
1966 | dname.name = rde->name; |
1967 | dname.len = rde->name_len; | |
8387ff25 | 1968 | dname.hash = full_name_hash(parent, dname.name, dname.len); |
355da1eb | 1969 | |
f5d55f03 JL |
1970 | tvino.ino = le64_to_cpu(rde->inode.in->ino); |
1971 | tvino.snap = le64_to_cpu(rde->inode.in->snapid); | |
355da1eb | 1972 | |
f3c4ebe6 | 1973 | if (rinfo->hash_order) { |
af9ffa6d | 1974 | u32 hash = ceph_frag_value(rde->raw_hash); |
f3c4ebe6 YZ |
1975 | if (hash != last_hash) |
1976 | fpos_offset = 2; | |
1977 | last_hash = hash; | |
1978 | rde->offset = ceph_make_fpos(hash, fpos_offset++, true); | |
1979 | } else { | |
1980 | rde->offset = ceph_make_fpos(frag, fpos_offset++, false); | |
1981 | } | |
355da1eb SW |
1982 | |
1983 | retry_lookup: | |
1984 | dn = d_lookup(parent, &dname); | |
38d46409 XL |
1985 | doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n", |
1986 | parent, dname.len, dname.name, dn); | |
355da1eb SW |
1987 | |
1988 | if (!dn) { | |
1989 | dn = d_alloc(parent, &dname); | |
38d46409 XL |
1990 | doutc(cl, "d_alloc %p '%.*s' = %p\n", parent, |
1991 | dname.len, dname.name, dn); | |
d37b1d99 | 1992 | if (!dn) { |
38d46409 | 1993 | doutc(cl, "d_alloc badness\n"); |
355da1eb SW |
1994 | err = -ENOMEM; |
1995 | goto out; | |
1996 | } | |
af9ffa6d XL |
1997 | if (rde->is_nokey) { |
1998 | spin_lock(&dn->d_lock); | |
1999 | dn->d_flags |= DCACHE_NOKEY_NAME; | |
2000 | spin_unlock(&dn->d_lock); | |
2001 | } | |
2b0143b5 | 2002 | } else if (d_really_is_positive(dn) && |
f5d55f03 JL |
2003 | (ceph_ino(d_inode(dn)) != tvino.ino || |
2004 | ceph_snap(d_inode(dn)) != tvino.snap)) { | |
5495c2d0 | 2005 | struct ceph_dentry_info *di = ceph_dentry(dn); |
38d46409 XL |
2006 | doutc(cl, " dn %p points to wrong inode %p\n", |
2007 | dn, d_inode(dn)); | |
5495c2d0 YZ |
2008 | |
2009 | spin_lock(&dn->d_lock); | |
2010 | if (di->offset > 0 && | |
2011 | di->lease_shared_gen == | |
2012 | atomic_read(&ci->i_shared_gen)) { | |
2013 | __ceph_dir_clear_ordered(ci); | |
2014 | di->offset = 0; | |
2015 | } | |
2016 | spin_unlock(&dn->d_lock); | |
2017 | ||
355da1eb SW |
2018 | d_delete(dn); |
2019 | dput(dn); | |
2020 | goto retry_lookup; | |
355da1eb SW |
2021 | } |
2022 | ||
355da1eb | 2023 | /* inode */ |
2b0143b5 DH |
2024 | if (d_really_is_positive(dn)) { |
2025 | in = d_inode(dn); | |
355da1eb | 2026 | } else { |
ec9595c0 | 2027 | in = ceph_get_inode(parent->d_sb, tvino, NULL); |
ac1f12ef | 2028 | if (IS_ERR(in)) { |
38d46409 | 2029 | doutc(cl, "new_inode badness\n"); |
2744c171 | 2030 | d_drop(dn); |
355da1eb | 2031 | dput(dn); |
ac1f12ef | 2032 | err = PTR_ERR(in); |
355da1eb SW |
2033 | goto out; |
2034 | } | |
355da1eb SW |
2035 | } |
2036 | ||
966c7160 JL |
2037 | ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, |
2038 | -1, &req->r_caps_reservation); | |
fdd4e158 | 2039 | if (ret < 0) { |
38d46409 XL |
2040 | pr_err_client(cl, "badness on %p %llx.%llx\n", in, |
2041 | ceph_vinop(in)); | |
3e1d0452 | 2042 | if (d_really_is_negative(dn)) { |
893e456b JL |
2043 | if (in->i_state & I_NEW) { |
2044 | ihold(in); | |
2045 | discard_new_inode(in); | |
2046 | } | |
23c2c76e | 2047 | iput(in); |
3e1d0452 | 2048 | } |
86b58d13 | 2049 | d_drop(dn); |
fdd4e158 | 2050 | err = ret; |
d69ed05a | 2051 | goto next_item; |
355da1eb | 2052 | } |
893e456b JL |
2053 | if (in->i_state & I_NEW) |
2054 | unlock_new_inode(in); | |
86b58d13 | 2055 | |
2b0143b5 | 2056 | if (d_really_is_negative(dn)) { |
315f2408 | 2057 | if (ceph_security_xattr_deadlock(in)) { |
38d46409 XL |
2058 | doutc(cl, " skip splicing dn %p to inode %p" |
2059 | " (security xattr deadlock)\n", dn, in); | |
23c2c76e | 2060 | iput(in); |
315f2408 YZ |
2061 | skipped++; |
2062 | goto next_item; | |
2063 | } | |
2064 | ||
2bf996ac YZ |
2065 | err = splice_dentry(&dn, in); |
2066 | if (err < 0) | |
86b58d13 | 2067 | goto next_item; |
86b58d13 YZ |
2068 | } |
2069 | ||
f3c4ebe6 | 2070 | ceph_dentry(dn)->offset = rde->offset; |
86b58d13 | 2071 | |
543212b3 YZ |
2072 | update_dentry_lease(d_inode(parent), dn, |
2073 | rde->lease, req->r_session, | |
2074 | req->r_request_started); | |
fdd4e158 | 2075 | |
315f2408 | 2076 | if (err == 0 && skipped == 0 && cache_ctl.index >= 0) { |
fdd4e158 YZ |
2077 | ret = fill_readdir_cache(d_inode(parent), dn, |
2078 | &cache_ctl, req); | |
2079 | if (ret < 0) | |
2080 | err = ret; | |
2081 | } | |
d69ed05a | 2082 | next_item: |
2bf996ac | 2083 | dput(dn); |
355da1eb | 2084 | } |
355da1eb | 2085 | out: |
315f2408 | 2086 | if (err == 0 && skipped == 0) { |
bc2de10d | 2087 | set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags); |
fdd4e158 YZ |
2088 | req->r_readdir_cache_idx = cache_ctl.index; |
2089 | } | |
2090 | ceph_readdir_cache_release(&cache_ctl); | |
38d46409 | 2091 | doutc(cl, "done\n"); |
355da1eb SW |
2092 | return err; |
2093 | } | |
2094 | ||
efb0ca76 | 2095 | bool ceph_inode_set_size(struct inode *inode, loff_t size) |
355da1eb | 2096 | { |
38d46409 | 2097 | struct ceph_client *cl = ceph_inode_to_client(inode); |
355da1eb | 2098 | struct ceph_inode_info *ci = ceph_inode(inode); |
efb0ca76 | 2099 | bool ret; |
355da1eb | 2100 | |
be655596 | 2101 | spin_lock(&ci->i_ceph_lock); |
38d46409 | 2102 | doutc(cl, "set_size %p %llu -> %llu\n", inode, i_size_read(inode), size); |
99c88e69 | 2103 | i_size_write(inode, size); |
400e1286 | 2104 | ceph_fscache_update(inode); |
224a7542 | 2105 | inode->i_blocks = calc_inode_blocks(size); |
355da1eb | 2106 | |
efb0ca76 | 2107 | ret = __ceph_should_report_size(ci); |
355da1eb | 2108 | |
be655596 | 2109 | spin_unlock(&ci->i_ceph_lock); |
400e1286 | 2110 | |
355da1eb SW |
2111 | return ret; |
2112 | } | |
2113 | ||
64f28c62 | 2114 | void ceph_queue_inode_work(struct inode *inode, int work_bit) |
355da1eb | 2115 | { |
5995d90d | 2116 | struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); |
38d46409 | 2117 | struct ceph_client *cl = fsc->client; |
1cf89a8d | 2118 | struct ceph_inode_info *ci = ceph_inode(inode); |
64f28c62 | 2119 | set_bit(work_bit, &ci->i_work_mask); |
1cf89a8d YZ |
2120 | |
2121 | ihold(inode); | |
64f28c62 | 2122 | if (queue_work(fsc->inode_wq, &ci->i_work)) { |
38d46409 XL |
2123 | doutc(cl, "%p %llx.%llx mask=%lx\n", inode, |
2124 | ceph_vinop(inode), ci->i_work_mask); | |
1cf89a8d | 2125 | } else { |
38d46409 XL |
2126 | doutc(cl, "%p %llx.%llx already queued, mask=%lx\n", |
2127 | inode, ceph_vinop(inode), ci->i_work_mask); | |
1cf89a8d YZ |
2128 | iput(inode); |
2129 | } | |
2130 | } | |
2131 | ||
2132 | static void ceph_do_invalidate_pages(struct inode *inode) | |
2133 | { | |
38d46409 | 2134 | struct ceph_client *cl = ceph_inode_to_client(inode); |
1cf89a8d | 2135 | struct ceph_inode_info *ci = ceph_inode(inode); |
355da1eb SW |
2136 | u32 orig_gen; |
2137 | int check = 0; | |
2138 | ||
400e1286 JL |
2139 | ceph_fscache_invalidate(inode, false); |
2140 | ||
b0d7c223 | 2141 | mutex_lock(&ci->i_truncate_mutex); |
6c93df5d | 2142 | |
5d6451b1 | 2143 | if (ceph_inode_is_shutdown(inode)) { |
38d46409 XL |
2144 | pr_warn_ratelimited_client(cl, |
2145 | "%p %llx.%llx is shut down\n", inode, | |
2146 | ceph_vinop(inode)); | |
6c93df5d YZ |
2147 | mapping_set_error(inode->i_mapping, -EIO); |
2148 | truncate_pagecache(inode, 0); | |
2149 | mutex_unlock(&ci->i_truncate_mutex); | |
2150 | goto out; | |
2151 | } | |
2152 | ||
be655596 | 2153 | spin_lock(&ci->i_ceph_lock); |
38d46409 XL |
2154 | doutc(cl, "%p %llx.%llx gen %d revoking %d\n", inode, |
2155 | ceph_vinop(inode), ci->i_rdcache_gen, ci->i_rdcache_revoking); | |
cd045cb4 | 2156 | if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { |
9563f88c YZ |
2157 | if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) |
2158 | check = 1; | |
be655596 | 2159 | spin_unlock(&ci->i_ceph_lock); |
b0d7c223 | 2160 | mutex_unlock(&ci->i_truncate_mutex); |
355da1eb SW |
2161 | goto out; |
2162 | } | |
2163 | orig_gen = ci->i_rdcache_gen; | |
be655596 | 2164 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 2165 | |
9abd4db7 | 2166 | if (invalidate_inode_pages2(inode->i_mapping) < 0) { |
38d46409 XL |
2167 | pr_err_client(cl, "invalidate_inode_pages2 %llx.%llx failed\n", |
2168 | ceph_vinop(inode)); | |
9abd4db7 | 2169 | } |
355da1eb | 2170 | |
be655596 | 2171 | spin_lock(&ci->i_ceph_lock); |
cd045cb4 SW |
2172 | if (orig_gen == ci->i_rdcache_gen && |
2173 | orig_gen == ci->i_rdcache_revoking) { | |
38d46409 XL |
2174 | doutc(cl, "%p %llx.%llx gen %d successful\n", inode, |
2175 | ceph_vinop(inode), ci->i_rdcache_gen); | |
cd045cb4 | 2176 | ci->i_rdcache_revoking--; |
355da1eb SW |
2177 | check = 1; |
2178 | } else { | |
38d46409 XL |
2179 | doutc(cl, "%p %llx.%llx gen %d raced, now %d revoking %d\n", |
2180 | inode, ceph_vinop(inode), orig_gen, ci->i_rdcache_gen, | |
2181 | ci->i_rdcache_revoking); | |
9563f88c YZ |
2182 | if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) |
2183 | check = 1; | |
355da1eb | 2184 | } |
be655596 | 2185 | spin_unlock(&ci->i_ceph_lock); |
b0d7c223 | 2186 | mutex_unlock(&ci->i_truncate_mutex); |
9563f88c | 2187 | out: |
355da1eb | 2188 | if (check) |
e4b731cc | 2189 | ceph_check_caps(ci, 0); |
3c6f6b79 SW |
2190 | } |
2191 | ||
355da1eb | 2192 | /* |
355da1eb SW |
2193 | * Make sure any pending truncation is applied before doing anything |
2194 | * that may depend on it. | |
2195 | */ | |
b415bf4f | 2196 | void __ceph_do_pending_vmtruncate(struct inode *inode) |
355da1eb | 2197 | { |
38d46409 | 2198 | struct ceph_client *cl = ceph_inode_to_client(inode); |
355da1eb SW |
2199 | struct ceph_inode_info *ci = ceph_inode(inode); |
2200 | u64 to; | |
a85f50b6 | 2201 | int wrbuffer_refs, finish = 0; |
355da1eb | 2202 | |
b0d7c223 | 2203 | mutex_lock(&ci->i_truncate_mutex); |
355da1eb | 2204 | retry: |
be655596 | 2205 | spin_lock(&ci->i_ceph_lock); |
355da1eb | 2206 | if (ci->i_truncate_pending == 0) { |
38d46409 XL |
2207 | doutc(cl, "%p %llx.%llx none pending\n", inode, |
2208 | ceph_vinop(inode)); | |
be655596 | 2209 | spin_unlock(&ci->i_ceph_lock); |
b0d7c223 | 2210 | mutex_unlock(&ci->i_truncate_mutex); |
355da1eb SW |
2211 | return; |
2212 | } | |
2213 | ||
2214 | /* | |
2215 | * make sure any dirty snapped pages are flushed before we | |
2216 | * possibly truncate them.. so write AND block! | |
2217 | */ | |
2218 | if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { | |
c8fd0d37 | 2219 | spin_unlock(&ci->i_ceph_lock); |
38d46409 XL |
2220 | doutc(cl, "%p %llx.%llx flushing snaps first\n", inode, |
2221 | ceph_vinop(inode)); | |
355da1eb SW |
2222 | filemap_write_and_wait_range(&inode->i_data, 0, |
2223 | inode->i_sb->s_maxbytes); | |
2224 | goto retry; | |
2225 | } | |
2226 | ||
b0d7c223 YZ |
2227 | /* there should be no reader or writer */ |
2228 | WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); | |
2229 | ||
5c64737d | 2230 | to = ci->i_truncate_pagecache_size; |
355da1eb | 2231 | wrbuffer_refs = ci->i_wrbuffer_ref; |
38d46409 XL |
2232 | doutc(cl, "%p %llx.%llx (%d) to %lld\n", inode, ceph_vinop(inode), |
2233 | ci->i_truncate_pending, to); | |
be655596 | 2234 | spin_unlock(&ci->i_ceph_lock); |
355da1eb | 2235 | |
400e1286 | 2236 | ceph_fscache_resize(inode, to); |
4e217b5d | 2237 | truncate_pagecache(inode, to); |
355da1eb | 2238 | |
be655596 | 2239 | spin_lock(&ci->i_ceph_lock); |
5c64737d | 2240 | if (to == ci->i_truncate_pagecache_size) { |
a85f50b6 YZ |
2241 | ci->i_truncate_pending = 0; |
2242 | finish = 1; | |
2243 | } | |
be655596 | 2244 | spin_unlock(&ci->i_ceph_lock); |
a85f50b6 YZ |
2245 | if (!finish) |
2246 | goto retry; | |
355da1eb | 2247 | |
b0d7c223 YZ |
2248 | mutex_unlock(&ci->i_truncate_mutex); |
2249 | ||
355da1eb | 2250 | if (wrbuffer_refs == 0) |
e4b731cc | 2251 | ceph_check_caps(ci, 0); |
a85f50b6 YZ |
2252 | |
2253 | wake_up_all(&ci->i_cap_wq); | |
355da1eb SW |
2254 | } |
2255 | ||
1cf89a8d YZ |
2256 | static void ceph_inode_work(struct work_struct *work) |
2257 | { | |
2258 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, | |
2259 | i_work); | |
874c8ca1 | 2260 | struct inode *inode = &ci->netfs.inode; |
38d46409 | 2261 | struct ceph_client *cl = ceph_inode_to_client(inode); |
1cf89a8d YZ |
2262 | |
2263 | if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) { | |
38d46409 | 2264 | doutc(cl, "writeback %p %llx.%llx\n", inode, ceph_vinop(inode)); |
1cf89a8d YZ |
2265 | filemap_fdatawrite(&inode->i_data); |
2266 | } | |
2267 | if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask)) | |
2268 | ceph_do_invalidate_pages(inode); | |
2269 | ||
2270 | if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask)) | |
2271 | __ceph_do_pending_vmtruncate(inode); | |
2272 | ||
a8810cdc | 2273 | if (test_and_clear_bit(CEPH_I_WORK_CHECK_CAPS, &ci->i_work_mask)) |
e4b731cc | 2274 | ceph_check_caps(ci, 0); |
a8810cdc JL |
2275 | |
2276 | if (test_and_clear_bit(CEPH_I_WORK_FLUSH_SNAPS, &ci->i_work_mask)) | |
2277 | ceph_flush_snaps(ci, NULL); | |
2278 | ||
1cf89a8d YZ |
2279 | iput(inode); |
2280 | } | |
2281 | ||
79f2f6ad JL |
2282 | static const char *ceph_encrypted_get_link(struct dentry *dentry, |
2283 | struct inode *inode, | |
2284 | struct delayed_call *done) | |
2285 | { | |
2286 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2287 | ||
2288 | if (!dentry) | |
2289 | return ERR_PTR(-ECHILD); | |
2290 | ||
2291 | return fscrypt_get_symlink(inode, ci->i_symlink, i_size_read(inode), | |
2292 | done); | |
2293 | } | |
2294 | ||
2295 | static int ceph_encrypted_symlink_getattr(struct mnt_idmap *idmap, | |
2296 | const struct path *path, | |
2297 | struct kstat *stat, u32 request_mask, | |
2298 | unsigned int query_flags) | |
2299 | { | |
2300 | int ret; | |
2301 | ||
2302 | ret = ceph_getattr(idmap, path, stat, request_mask, query_flags); | |
2303 | if (ret) | |
2304 | return ret; | |
2305 | return fscrypt_symlink_getattr(path, stat); | |
2306 | } | |
2307 | ||
355da1eb SW |
2308 | /* |
2309 | * symlinks | |
2310 | */ | |
355da1eb | 2311 | static const struct inode_operations ceph_symlink_iops = { |
6b255391 | 2312 | .get_link = simple_get_link, |
0b932672 YZ |
2313 | .setattr = ceph_setattr, |
2314 | .getattr = ceph_getattr, | |
0b932672 | 2315 | .listxattr = ceph_listxattr, |
355da1eb SW |
2316 | }; |
2317 | ||
79f2f6ad JL |
2318 | static const struct inode_operations ceph_encrypted_symlink_iops = { |
2319 | .get_link = ceph_encrypted_get_link, | |
2320 | .setattr = ceph_setattr, | |
2321 | .getattr = ceph_encrypted_symlink_getattr, | |
2322 | .listxattr = ceph_listxattr, | |
2323 | }; | |
2324 | ||
5c64737d XL |
2325 | /* |
2326 | * Transfer the encrypted last block to the MDS and the MDS | |
2327 | * will help update it when truncating a smaller size. | |
2328 | * | |
2329 | * We don't support a PAGE_SIZE that is smaller than the | |
2330 | * CEPH_FSCRYPT_BLOCK_SIZE. | |
2331 | */ | |
2332 | static int fill_fscrypt_truncate(struct inode *inode, | |
2333 | struct ceph_mds_request *req, | |
2334 | struct iattr *attr) | |
2335 | { | |
38d46409 | 2336 | struct ceph_client *cl = ceph_inode_to_client(inode); |
5c64737d XL |
2337 | struct ceph_inode_info *ci = ceph_inode(inode); |
2338 | int boff = attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE; | |
2339 | loff_t pos, orig_pos = round_down(attr->ia_size, | |
2340 | CEPH_FSCRYPT_BLOCK_SIZE); | |
2341 | u64 block = orig_pos >> CEPH_FSCRYPT_BLOCK_SHIFT; | |
2342 | struct ceph_pagelist *pagelist = NULL; | |
2343 | struct kvec iov = {0}; | |
2344 | struct iov_iter iter; | |
2345 | struct page *page = NULL; | |
2346 | struct ceph_fscrypt_truncate_size_header header; | |
2347 | int retry_op = 0; | |
2348 | int len = CEPH_FSCRYPT_BLOCK_SIZE; | |
2349 | loff_t i_size = i_size_read(inode); | |
2350 | int got, ret, issued; | |
2351 | u64 objver; | |
2352 | ||
2353 | ret = __ceph_get_caps(inode, NULL, CEPH_CAP_FILE_RD, 0, -1, &got); | |
2354 | if (ret < 0) | |
2355 | return ret; | |
2356 | ||
2357 | issued = __ceph_caps_issued(ci, NULL); | |
2358 | ||
38d46409 XL |
2359 | doutc(cl, "size %lld -> %lld got cap refs on %s, issued %s\n", |
2360 | i_size, attr->ia_size, ceph_cap_string(got), | |
2361 | ceph_cap_string(issued)); | |
5c64737d XL |
2362 | |
2363 | /* Try to writeback the dirty pagecaches */ | |
2364 | if (issued & (CEPH_CAP_FILE_BUFFER)) { | |
2365 | loff_t lend = orig_pos + CEPH_FSCRYPT_BLOCK_SHIFT - 1; | |
2366 | ||
2367 | ret = filemap_write_and_wait_range(inode->i_mapping, | |
2368 | orig_pos, lend); | |
2369 | if (ret < 0) | |
2370 | goto out; | |
2371 | } | |
2372 | ||
2373 | page = __page_cache_alloc(GFP_KERNEL); | |
2374 | if (page == NULL) { | |
2375 | ret = -ENOMEM; | |
2376 | goto out; | |
2377 | } | |
2378 | ||
2379 | pagelist = ceph_pagelist_alloc(GFP_KERNEL); | |
2380 | if (!pagelist) { | |
2381 | ret = -ENOMEM; | |
2382 | goto out; | |
2383 | } | |
2384 | ||
2385 | iov.iov_base = kmap_local_page(page); | |
2386 | iov.iov_len = len; | |
2387 | iov_iter_kvec(&iter, READ, &iov, 1, len); | |
2388 | ||
2389 | pos = orig_pos; | |
2390 | ret = __ceph_sync_read(inode, &pos, &iter, &retry_op, &objver); | |
2391 | if (ret < 0) | |
2392 | goto out; | |
2393 | ||
2394 | /* Insert the header first */ | |
2395 | header.ver = 1; | |
2396 | header.compat = 1; | |
2397 | header.change_attr = cpu_to_le64(inode_peek_iversion_raw(inode)); | |
2398 | ||
2399 | /* | |
2400 | * Always set the block_size to CEPH_FSCRYPT_BLOCK_SIZE, | |
2401 | * because in MDS it may need this to do the truncate. | |
2402 | */ | |
2403 | header.block_size = cpu_to_le32(CEPH_FSCRYPT_BLOCK_SIZE); | |
2404 | ||
2405 | /* | |
2406 | * If we hit a hole here, we should just skip filling | |
2407 | * the fscrypt for the request, because once the fscrypt | |
2408 | * is enabled, the file will be split into many blocks | |
2409 | * with the size of CEPH_FSCRYPT_BLOCK_SIZE, if there | |
2410 | * has a hole, the hole size should be multiple of block | |
2411 | * size. | |
2412 | * | |
2413 | * If the Rados object doesn't exist, it will be set to 0. | |
2414 | */ | |
2415 | if (!objver) { | |
38d46409 | 2416 | doutc(cl, "hit hole, ppos %lld < size %lld\n", pos, i_size); |
5c64737d XL |
2417 | |
2418 | header.data_len = cpu_to_le32(8 + 8 + 4); | |
2419 | header.file_offset = 0; | |
2420 | ret = 0; | |
2421 | } else { | |
2422 | header.data_len = cpu_to_le32(8 + 8 + 4 + CEPH_FSCRYPT_BLOCK_SIZE); | |
2423 | header.file_offset = cpu_to_le64(orig_pos); | |
2424 | ||
38d46409 XL |
2425 | doutc(cl, "encrypt block boff/bsize %d/%lu\n", boff, |
2426 | CEPH_FSCRYPT_BLOCK_SIZE); | |
295fc4aa | 2427 | |
5c64737d XL |
2428 | /* truncate and zero out the extra contents for the last block */ |
2429 | memset(iov.iov_base + boff, 0, PAGE_SIZE - boff); | |
2430 | ||
2431 | /* encrypt the last block */ | |
2432 | ret = ceph_fscrypt_encrypt_block_inplace(inode, page, | |
2433 | CEPH_FSCRYPT_BLOCK_SIZE, | |
2434 | 0, block, | |
2435 | GFP_KERNEL); | |
2436 | if (ret) | |
2437 | goto out; | |
2438 | } | |
2439 | ||
2440 | /* Insert the header */ | |
2441 | ret = ceph_pagelist_append(pagelist, &header, sizeof(header)); | |
2442 | if (ret) | |
2443 | goto out; | |
2444 | ||
2445 | if (header.block_size) { | |
2446 | /* Append the last block contents to pagelist */ | |
2447 | ret = ceph_pagelist_append(pagelist, iov.iov_base, | |
2448 | CEPH_FSCRYPT_BLOCK_SIZE); | |
2449 | if (ret) | |
2450 | goto out; | |
2451 | } | |
2452 | req->r_pagelist = pagelist; | |
2453 | out: | |
38d46409 XL |
2454 | doutc(cl, "%p %llx.%llx size dropping cap refs on %s\n", inode, |
2455 | ceph_vinop(inode), ceph_cap_string(got)); | |
5c64737d XL |
2456 | ceph_put_cap_refs(ci, got); |
2457 | if (iov.iov_base) | |
2458 | kunmap_local(iov.iov_base); | |
2459 | if (page) | |
2460 | __free_pages(page, 0); | |
2461 | if (ret && pagelist) | |
2462 | ceph_pagelist_release(pagelist); | |
2463 | return ret; | |
2464 | } | |
2465 | ||
79c66a0c AM |
2466 | int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode, |
2467 | struct iattr *attr, struct ceph_iattr *cia) | |
355da1eb | 2468 | { |
355da1eb | 2469 | struct ceph_inode_info *ci = ceph_inode(inode); |
c62498d7 | 2470 | unsigned int ia_valid = attr->ia_valid; |
355da1eb | 2471 | struct ceph_mds_request *req; |
5995d90d | 2472 | struct ceph_mds_client *mdsc = ceph_sb_to_fs_client(inode->i_sb)->mdsc; |
38d46409 | 2473 | struct ceph_client *cl = ceph_inode_to_client(inode); |
f66fd9f0 | 2474 | struct ceph_cap_flush *prealloc_cf; |
5c64737d | 2475 | loff_t isize = i_size_read(inode); |
355da1eb SW |
2476 | int issued; |
2477 | int release = 0, dirtied = 0; | |
2478 | int mask = 0; | |
2479 | int err = 0; | |
fca65b4a | 2480 | int inode_dirty_flags = 0; |
604d1b02 | 2481 | bool lock_snap_rwsem = false; |
5c64737d XL |
2482 | bool fill_fscrypt; |
2483 | int truncate_retry = 20; /* The RMW will take around 50ms */ | |
ded67830 XL |
2484 | struct dentry *dentry; |
2485 | char *path; | |
2486 | int pathlen; | |
2487 | u64 pathbase; | |
2488 | bool do_sync = false; | |
2489 | ||
2490 | dentry = d_find_alias(inode); | |
2491 | if (!dentry) { | |
2492 | do_sync = true; | |
2493 | } else { | |
2494 | path = ceph_mdsc_build_path(mdsc, dentry, &pathlen, &pathbase, 0); | |
2495 | if (IS_ERR(path)) { | |
2496 | do_sync = true; | |
2497 | err = 0; | |
2498 | } else { | |
2499 | err = ceph_mds_check_access(mdsc, path, MAY_WRITE); | |
2500 | } | |
2501 | ceph_mdsc_free_path(path, pathlen); | |
2502 | dput(dentry); | |
2503 | ||
2504 | /* For none EACCES cases will let the MDS do the mds auth check */ | |
2505 | if (err == -EACCES) { | |
2506 | return err; | |
2507 | } else if (err < 0) { | |
2508 | do_sync = true; | |
2509 | err = 0; | |
2510 | } | |
2511 | } | |
355da1eb | 2512 | |
5c64737d | 2513 | retry: |
f66fd9f0 YZ |
2514 | prealloc_cf = ceph_alloc_cap_flush(); |
2515 | if (!prealloc_cf) | |
2516 | return -ENOMEM; | |
2517 | ||
355da1eb SW |
2518 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, |
2519 | USE_AUTH_MDS); | |
f66fd9f0 YZ |
2520 | if (IS_ERR(req)) { |
2521 | ceph_free_cap_flush(prealloc_cf); | |
355da1eb | 2522 | return PTR_ERR(req); |
f66fd9f0 | 2523 | } |
355da1eb | 2524 | |
5c64737d | 2525 | fill_fscrypt = false; |
be655596 | 2526 | spin_lock(&ci->i_ceph_lock); |
355da1eb | 2527 | issued = __ceph_caps_issued(ci, NULL); |
604d1b02 YZ |
2528 | |
2529 | if (!ci->i_head_snapc && | |
2530 | (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) { | |
2531 | lock_snap_rwsem = true; | |
2532 | if (!down_read_trylock(&mdsc->snap_rwsem)) { | |
2533 | spin_unlock(&ci->i_ceph_lock); | |
2534 | down_read(&mdsc->snap_rwsem); | |
2535 | spin_lock(&ci->i_ceph_lock); | |
2536 | issued = __ceph_caps_issued(ci, NULL); | |
2537 | } | |
2538 | } | |
2539 | ||
38d46409 XL |
2540 | doutc(cl, "%p %llx.%llx issued %s\n", inode, ceph_vinop(inode), |
2541 | ceph_cap_string(issued)); | |
2d332d5b JL |
2542 | #if IS_ENABLED(CONFIG_FS_ENCRYPTION) |
2543 | if (cia && cia->fscrypt_auth) { | |
2544 | u32 len = ceph_fscrypt_auth_len(cia->fscrypt_auth); | |
2545 | ||
2546 | if (len > sizeof(*cia->fscrypt_auth)) { | |
2547 | err = -EINVAL; | |
2548 | spin_unlock(&ci->i_ceph_lock); | |
2549 | goto out; | |
2550 | } | |
2551 | ||
38d46409 XL |
2552 | doutc(cl, "%p %llx.%llx fscrypt_auth len %u to %u)\n", inode, |
2553 | ceph_vinop(inode), ci->fscrypt_auth_len, len); | |
2d332d5b JL |
2554 | |
2555 | /* It should never be re-set once set */ | |
2556 | WARN_ON_ONCE(ci->fscrypt_auth); | |
2557 | ||
ded67830 | 2558 | if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) { |
2d332d5b JL |
2559 | dirtied |= CEPH_CAP_AUTH_EXCL; |
2560 | kfree(ci->fscrypt_auth); | |
2561 | ci->fscrypt_auth = (u8 *)cia->fscrypt_auth; | |
2562 | ci->fscrypt_auth_len = len; | |
2563 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
2564 | ci->fscrypt_auth_len != len || | |
2565 | memcmp(ci->fscrypt_auth, cia->fscrypt_auth, len)) { | |
2566 | req->r_fscrypt_auth = cia->fscrypt_auth; | |
2567 | mask |= CEPH_SETATTR_FSCRYPT_AUTH; | |
2568 | release |= CEPH_CAP_AUTH_SHARED; | |
2569 | } | |
2570 | cia->fscrypt_auth = NULL; | |
2571 | } | |
2572 | #else | |
2573 | if (cia && cia->fscrypt_auth) { | |
2574 | err = -EINVAL; | |
2575 | spin_unlock(&ci->i_ceph_lock); | |
2576 | goto out; | |
2577 | } | |
2578 | #endif /* CONFIG_FS_ENCRYPTION */ | |
355da1eb SW |
2579 | |
2580 | if (ia_valid & ATTR_UID) { | |
a04aff25 CB |
2581 | kuid_t fsuid = from_vfsuid(idmap, i_user_ns(inode), attr->ia_vfsuid); |
2582 | ||
38d46409 XL |
2583 | doutc(cl, "%p %llx.%llx uid %d -> %d\n", inode, |
2584 | ceph_vinop(inode), | |
2585 | from_kuid(&init_user_ns, inode->i_uid), | |
2586 | from_kuid(&init_user_ns, attr->ia_uid)); | |
ded67830 | 2587 | if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) { |
a04aff25 | 2588 | inode->i_uid = fsuid; |
355da1eb SW |
2589 | dirtied |= CEPH_CAP_AUTH_EXCL; |
2590 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
a04aff25 | 2591 | !uid_eq(fsuid, inode->i_uid)) { |
ab871b90 | 2592 | req->r_args.setattr.uid = cpu_to_le32( |
a04aff25 | 2593 | from_kuid(&init_user_ns, fsuid)); |
355da1eb SW |
2594 | mask |= CEPH_SETATTR_UID; |
2595 | release |= CEPH_CAP_AUTH_SHARED; | |
2596 | } | |
2597 | } | |
2598 | if (ia_valid & ATTR_GID) { | |
a04aff25 CB |
2599 | kgid_t fsgid = from_vfsgid(idmap, i_user_ns(inode), attr->ia_vfsgid); |
2600 | ||
38d46409 XL |
2601 | doutc(cl, "%p %llx.%llx gid %d -> %d\n", inode, |
2602 | ceph_vinop(inode), | |
2603 | from_kgid(&init_user_ns, inode->i_gid), | |
2604 | from_kgid(&init_user_ns, attr->ia_gid)); | |
ded67830 | 2605 | if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) { |
a04aff25 | 2606 | inode->i_gid = fsgid; |
355da1eb SW |
2607 | dirtied |= CEPH_CAP_AUTH_EXCL; |
2608 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
a04aff25 | 2609 | !gid_eq(fsgid, inode->i_gid)) { |
ab871b90 | 2610 | req->r_args.setattr.gid = cpu_to_le32( |
a04aff25 | 2611 | from_kgid(&init_user_ns, fsgid)); |
355da1eb SW |
2612 | mask |= CEPH_SETATTR_GID; |
2613 | release |= CEPH_CAP_AUTH_SHARED; | |
2614 | } | |
2615 | } | |
2616 | if (ia_valid & ATTR_MODE) { | |
38d46409 XL |
2617 | doutc(cl, "%p %llx.%llx mode 0%o -> 0%o\n", inode, |
2618 | ceph_vinop(inode), inode->i_mode, attr->ia_mode); | |
ded67830 | 2619 | if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) { |
355da1eb SW |
2620 | inode->i_mode = attr->ia_mode; |
2621 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
2622 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || | |
2623 | attr->ia_mode != inode->i_mode) { | |
7221fe4c | 2624 | inode->i_mode = attr->ia_mode; |
355da1eb SW |
2625 | req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); |
2626 | mask |= CEPH_SETATTR_MODE; | |
2627 | release |= CEPH_CAP_AUTH_SHARED; | |
2628 | } | |
2629 | } | |
2630 | ||
2631 | if (ia_valid & ATTR_ATIME) { | |
c453bdb5 JL |
2632 | struct timespec64 atime = inode_get_atime(inode); |
2633 | ||
e21165bf LT |
2634 | doutc(cl, "%p %llx.%llx atime %lld.%09ld -> %lld.%09ld\n", |
2635 | inode, ceph_vinop(inode), | |
2636 | atime.tv_sec, atime.tv_nsec, | |
2637 | attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); | |
ded67830 | 2638 | if (!do_sync && (issued & CEPH_CAP_FILE_EXCL)) { |
355da1eb | 2639 | ci->i_time_warp_seq++; |
c453bdb5 | 2640 | inode_set_atime_to_ts(inode, attr->ia_atime); |
355da1eb | 2641 | dirtied |= CEPH_CAP_FILE_EXCL; |
ded67830 | 2642 | } else if (!do_sync && (issued & CEPH_CAP_FILE_WR) && |
c453bdb5 JL |
2643 | timespec64_compare(&atime, |
2644 | &attr->ia_atime) < 0) { | |
2645 | inode_set_atime_to_ts(inode, attr->ia_atime); | |
355da1eb SW |
2646 | dirtied |= CEPH_CAP_FILE_WR; |
2647 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
c453bdb5 | 2648 | !timespec64_equal(&atime, &attr->ia_atime)) { |
9bbeab41 AB |
2649 | ceph_encode_timespec64(&req->r_args.setattr.atime, |
2650 | &attr->ia_atime); | |
355da1eb | 2651 | mask |= CEPH_SETATTR_ATIME; |
be70489e YZ |
2652 | release |= CEPH_CAP_FILE_SHARED | |
2653 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; | |
355da1eb SW |
2654 | } |
2655 | } | |
c62498d7 | 2656 | if (ia_valid & ATTR_SIZE) { |
38d46409 XL |
2657 | doutc(cl, "%p %llx.%llx size %lld -> %lld\n", inode, |
2658 | ceph_vinop(inode), isize, attr->ia_size); | |
5c64737d XL |
2659 | /* |
2660 | * Only when the new size is smaller and not aligned to | |
2661 | * CEPH_FSCRYPT_BLOCK_SIZE will the RMW is needed. | |
2662 | */ | |
2663 | if (IS_ENCRYPTED(inode) && attr->ia_size < isize && | |
2664 | (attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE)) { | |
2665 | mask |= CEPH_SETATTR_SIZE; | |
2666 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | | |
2667 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; | |
2668 | set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); | |
2669 | mask |= CEPH_SETATTR_FSCRYPT_FILE; | |
2670 | req->r_args.setattr.size = | |
2671 | cpu_to_le64(round_up(attr->ia_size, | |
2672 | CEPH_FSCRYPT_BLOCK_SIZE)); | |
2673 | req->r_args.setattr.old_size = | |
2674 | cpu_to_le64(round_up(isize, | |
2675 | CEPH_FSCRYPT_BLOCK_SIZE)); | |
2676 | req->r_fscrypt_file = attr->ia_size; | |
2677 | fill_fscrypt = true; | |
ded67830 | 2678 | } else if (!do_sync && (issued & CEPH_CAP_FILE_EXCL) && attr->ia_size >= isize) { |
e90334e8 XL |
2679 | if (attr->ia_size > isize) { |
2680 | i_size_write(inode, attr->ia_size); | |
2681 | inode->i_blocks = calc_inode_blocks(attr->ia_size); | |
2682 | ci->i_reported_size = attr->ia_size; | |
2683 | dirtied |= CEPH_CAP_FILE_EXCL; | |
2684 | ia_valid |= ATTR_MTIME; | |
2685 | } | |
c62498d7 | 2686 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || |
2d6795fb | 2687 | attr->ia_size != isize) { |
c62498d7 JL |
2688 | mask |= CEPH_SETATTR_SIZE; |
2689 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | | |
2690 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; | |
16be62fc JL |
2691 | if (IS_ENCRYPTED(inode) && attr->ia_size) { |
2692 | set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); | |
2693 | mask |= CEPH_SETATTR_FSCRYPT_FILE; | |
2694 | req->r_args.setattr.size = | |
2695 | cpu_to_le64(round_up(attr->ia_size, | |
2696 | CEPH_FSCRYPT_BLOCK_SIZE)); | |
2697 | req->r_args.setattr.old_size = | |
2698 | cpu_to_le64(round_up(isize, | |
2699 | CEPH_FSCRYPT_BLOCK_SIZE)); | |
2700 | req->r_fscrypt_file = attr->ia_size; | |
16be62fc JL |
2701 | } else { |
2702 | req->r_args.setattr.size = cpu_to_le64(attr->ia_size); | |
2703 | req->r_args.setattr.old_size = cpu_to_le64(isize); | |
2704 | req->r_fscrypt_file = 0; | |
2705 | } | |
c62498d7 JL |
2706 | } |
2707 | } | |
355da1eb | 2708 | if (ia_valid & ATTR_MTIME) { |
c453bdb5 JL |
2709 | struct timespec64 mtime = inode_get_mtime(inode); |
2710 | ||
e21165bf LT |
2711 | doutc(cl, "%p %llx.%llx mtime %lld.%09ld -> %lld.%09ld\n", |
2712 | inode, ceph_vinop(inode), | |
2713 | mtime.tv_sec, mtime.tv_nsec, | |
2714 | attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); | |
ded67830 | 2715 | if (!do_sync && (issued & CEPH_CAP_FILE_EXCL)) { |
355da1eb | 2716 | ci->i_time_warp_seq++; |
c453bdb5 | 2717 | inode_set_mtime_to_ts(inode, attr->ia_mtime); |
355da1eb | 2718 | dirtied |= CEPH_CAP_FILE_EXCL; |
ded67830 | 2719 | } else if (!do_sync && (issued & CEPH_CAP_FILE_WR) && |
c453bdb5 JL |
2720 | timespec64_compare(&mtime, &attr->ia_mtime) < 0) { |
2721 | inode_set_mtime_to_ts(inode, attr->ia_mtime); | |
355da1eb SW |
2722 | dirtied |= CEPH_CAP_FILE_WR; |
2723 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || | |
c453bdb5 | 2724 | !timespec64_equal(&mtime, &attr->ia_mtime)) { |
9bbeab41 AB |
2725 | ceph_encode_timespec64(&req->r_args.setattr.mtime, |
2726 | &attr->ia_mtime); | |
355da1eb | 2727 | mask |= CEPH_SETATTR_MTIME; |
be70489e YZ |
2728 | release |= CEPH_CAP_FILE_SHARED | |
2729 | CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; | |
355da1eb SW |
2730 | } |
2731 | } | |
355da1eb SW |
2732 | |
2733 | /* these do nothing */ | |
2734 | if (ia_valid & ATTR_CTIME) { | |
2735 | bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| | |
2736 | ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; | |
e21165bf LT |
2737 | doutc(cl, "%p %llx.%llx ctime %lld.%09ld -> %lld.%09ld (%s)\n", |
2738 | inode, ceph_vinop(inode), | |
2739 | inode_get_ctime_sec(inode), | |
2740 | inode_get_ctime_nsec(inode), | |
38d46409 XL |
2741 | attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, |
2742 | only ? "ctime only" : "ignored"); | |
355da1eb SW |
2743 | if (only) { |
2744 | /* | |
2745 | * if kernel wants to dirty ctime but nothing else, | |
2746 | * we need to choose a cap to dirty under, or do | |
2747 | * a almost-no-op setattr | |
2748 | */ | |
2749 | if (issued & CEPH_CAP_AUTH_EXCL) | |
2750 | dirtied |= CEPH_CAP_AUTH_EXCL; | |
2751 | else if (issued & CEPH_CAP_FILE_EXCL) | |
2752 | dirtied |= CEPH_CAP_FILE_EXCL; | |
2753 | else if (issued & CEPH_CAP_XATTR_EXCL) | |
2754 | dirtied |= CEPH_CAP_XATTR_EXCL; | |
2755 | else | |
2756 | mask |= CEPH_SETATTR_CTIME; | |
2757 | } | |
2758 | } | |
2759 | if (ia_valid & ATTR_FILE) | |
38d46409 XL |
2760 | doutc(cl, "%p %llx.%llx ATTR_FILE ... hrm!\n", inode, |
2761 | ceph_vinop(inode)); | |
355da1eb SW |
2762 | |
2763 | if (dirtied) { | |
f66fd9f0 YZ |
2764 | inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied, |
2765 | &prealloc_cf); | |
7795aef0 | 2766 | inode_set_ctime_to_ts(inode, attr->ia_ctime); |
b4b924c7 | 2767 | inode_inc_iversion_raw(inode); |
355da1eb SW |
2768 | } |
2769 | ||
2770 | release &= issued; | |
be655596 | 2771 | spin_unlock(&ci->i_ceph_lock); |
5c64737d | 2772 | if (lock_snap_rwsem) { |
604d1b02 | 2773 | up_read(&mdsc->snap_rwsem); |
5c64737d XL |
2774 | lock_snap_rwsem = false; |
2775 | } | |
355da1eb | 2776 | |
fca65b4a SW |
2777 | if (inode_dirty_flags) |
2778 | __mark_inode_dirty(inode, inode_dirty_flags); | |
2779 | ||
355da1eb | 2780 | if (mask) { |
70b666c3 SW |
2781 | req->r_inode = inode; |
2782 | ihold(inode); | |
355da1eb SW |
2783 | req->r_inode_drop = release; |
2784 | req->r_args.setattr.mask = cpu_to_le32(mask); | |
2785 | req->r_num_caps = 1; | |
0ed1e90a | 2786 | req->r_stamp = attr->ia_ctime; |
5c64737d XL |
2787 | if (fill_fscrypt) { |
2788 | err = fill_fscrypt_truncate(inode, req, attr); | |
2789 | if (err) | |
2790 | goto out; | |
2791 | } | |
2792 | ||
2793 | /* | |
2794 | * The truncate request will return -EAGAIN when the | |
2795 | * last block has been updated just before the MDS | |
2796 | * successfully gets the xlock for the FILE lock. To | |
2797 | * avoid corrupting the file contents we need to retry | |
2798 | * it. | |
2799 | */ | |
752c8bdc | 2800 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
5c64737d | 2801 | if (err == -EAGAIN && truncate_retry--) { |
38d46409 XL |
2802 | doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote), retry it!\n", |
2803 | inode, ceph_vinop(inode), err, | |
2804 | ceph_cap_string(dirtied), mask); | |
5c64737d XL |
2805 | ceph_mdsc_put_request(req); |
2806 | ceph_free_cap_flush(prealloc_cf); | |
2807 | goto retry; | |
2808 | } | |
355da1eb | 2809 | } |
2d332d5b | 2810 | out: |
38d46409 XL |
2811 | doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote)\n", inode, |
2812 | ceph_vinop(inode), err, ceph_cap_string(dirtied), mask); | |
355da1eb | 2813 | |
355da1eb | 2814 | ceph_mdsc_put_request(req); |
f66fd9f0 | 2815 | ceph_free_cap_flush(prealloc_cf); |
8179a101 YZ |
2816 | |
2817 | if (err >= 0 && (mask & CEPH_SETATTR_SIZE)) | |
2818 | __ceph_do_pending_vmtruncate(inode); | |
2819 | ||
355da1eb SW |
2820 | return err; |
2821 | } | |
2822 | ||
a26fecca AG |
2823 | /* |
2824 | * setattr | |
2825 | */ | |
c1632a0f | 2826 | int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry, |
549c7297 | 2827 | struct iattr *attr) |
a26fecca | 2828 | { |
fd5472ed | 2829 | struct inode *inode = d_inode(dentry); |
5995d90d | 2830 | struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); |
fd5472ed JK |
2831 | int err; |
2832 | ||
2833 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
2834 | return -EROFS; | |
2835 | ||
5d6451b1 JL |
2836 | if (ceph_inode_is_shutdown(inode)) |
2837 | return -ESTALE; | |
2838 | ||
94af0470 JL |
2839 | err = fscrypt_prepare_setattr(dentry, attr); |
2840 | if (err) | |
2841 | return err; | |
2842 | ||
a04aff25 | 2843 | err = setattr_prepare(idmap, dentry, attr); |
fd5472ed JK |
2844 | if (err != 0) |
2845 | return err; | |
2846 | ||
36a4c72d | 2847 | if ((attr->ia_valid & ATTR_SIZE) && |
2d6795fb | 2848 | attr->ia_size > max(i_size_read(inode), fsc->max_file_size)) |
36a4c72d CX |
2849 | return -EFBIG; |
2850 | ||
2b83845f LH |
2851 | if ((attr->ia_valid & ATTR_SIZE) && |
2852 | ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) | |
2853 | return -EDQUOT; | |
2854 | ||
79c66a0c | 2855 | err = __ceph_setattr(idmap, inode, attr, NULL); |
8179a101 YZ |
2856 | |
2857 | if (err >= 0 && (attr->ia_valid & ATTR_MODE)) | |
a04aff25 | 2858 | err = posix_acl_chmod(idmap, dentry, attr->ia_mode); |
8179a101 YZ |
2859 | |
2860 | return err; | |
a26fecca AG |
2861 | } |
2862 | ||
5eed80fb XL |
2863 | int ceph_try_to_choose_auth_mds(struct inode *inode, int mask) |
2864 | { | |
2865 | int issued = ceph_caps_issued(ceph_inode(inode)); | |
2866 | ||
2867 | /* | |
2868 | * If any 'x' caps is issued we can just choose the auth MDS | |
2869 | * instead of the random replica MDSes. Because only when the | |
2870 | * Locker is in LOCK_EXEC state will the loner client could | |
2871 | * get the 'x' caps. And if we send the getattr requests to | |
2872 | * any replica MDS it must auth pin and tries to rdlock from | |
2873 | * the auth MDS, and then the auth MDS need to do the Locker | |
2874 | * state transition to LOCK_SYNC. And after that the lock state | |
2875 | * will change back. | |
2876 | * | |
2877 | * This cost much when doing the Locker state transition and | |
2878 | * usually will need to revoke caps from clients. | |
8266c4d7 XL |
2879 | * |
2880 | * And for the 'Xs' caps for getxattr we will also choose the | |
2881 | * auth MDS, because the MDS side code is buggy due to setxattr | |
2882 | * won't notify the replica MDSes when the values changed and | |
2883 | * the replica MDS will return the old values. Though we will | |
2884 | * fix it in MDS code, but this still makes sense for old ceph. | |
5eed80fb XL |
2885 | */ |
2886 | if (((mask & CEPH_CAP_ANY_SHARED) && (issued & CEPH_CAP_ANY_EXCL)) | |
8266c4d7 | 2887 | || (mask & (CEPH_STAT_RSTAT | CEPH_STAT_CAP_XATTR))) |
5eed80fb XL |
2888 | return USE_AUTH_MDS; |
2889 | else | |
2890 | return USE_ANY_MDS; | |
2891 | } | |
2892 | ||
355da1eb SW |
2893 | /* |
2894 | * Verify that we have a lease on the given mask. If not, | |
2895 | * do a getattr against an mds. | |
2896 | */ | |
01deead0 YZ |
2897 | int __ceph_do_getattr(struct inode *inode, struct page *locked_page, |
2898 | int mask, bool force) | |
355da1eb | 2899 | { |
5995d90d | 2900 | struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb); |
38d46409 | 2901 | struct ceph_client *cl = fsc->client; |
3d14c5d2 | 2902 | struct ceph_mds_client *mdsc = fsc->mdsc; |
355da1eb | 2903 | struct ceph_mds_request *req; |
49a9f4f6 | 2904 | int mode; |
355da1eb SW |
2905 | int err; |
2906 | ||
2907 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
38d46409 XL |
2908 | doutc(cl, "inode %p %llx.%llx SNAPDIR\n", inode, |
2909 | ceph_vinop(inode)); | |
355da1eb SW |
2910 | return 0; |
2911 | } | |
2912 | ||
38d46409 XL |
2913 | doutc(cl, "inode %p %llx.%llx mask %s mode 0%o\n", inode, |
2914 | ceph_vinop(inode), ceph_cap_string(mask), inode->i_mode); | |
1af16d54 XL |
2915 | if (!force && ceph_caps_issued_mask_metric(ceph_inode(inode), mask, 1)) |
2916 | return 0; | |
355da1eb | 2917 | |
5eed80fb | 2918 | mode = ceph_try_to_choose_auth_mds(inode, mask); |
49a9f4f6 | 2919 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode); |
355da1eb SW |
2920 | if (IS_ERR(req)) |
2921 | return PTR_ERR(req); | |
70b666c3 SW |
2922 | req->r_inode = inode; |
2923 | ihold(inode); | |
355da1eb SW |
2924 | req->r_num_caps = 1; |
2925 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
01deead0 | 2926 | req->r_locked_page = locked_page; |
355da1eb | 2927 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
01deead0 YZ |
2928 | if (locked_page && err == 0) { |
2929 | u64 inline_version = req->r_reply_info.targeti.inline_version; | |
2930 | if (inline_version == 0) { | |
2931 | /* the reply is supposed to contain inline data */ | |
2932 | err = -EINVAL; | |
48490776 XL |
2933 | } else if (inline_version == CEPH_INLINE_NONE || |
2934 | inline_version == 1) { | |
01deead0 YZ |
2935 | err = -ENODATA; |
2936 | } else { | |
2937 | err = req->r_reply_info.targeti.inline_len; | |
2938 | } | |
2939 | } | |
355da1eb | 2940 | ceph_mdsc_put_request(req); |
38d46409 | 2941 | doutc(cl, "result=%d\n", err); |
355da1eb SW |
2942 | return err; |
2943 | } | |
2944 | ||
6ddf5f16 MC |
2945 | int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, |
2946 | size_t size) | |
2947 | { | |
5995d90d | 2948 | struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb); |
38d46409 | 2949 | struct ceph_client *cl = fsc->client; |
6ddf5f16 MC |
2950 | struct ceph_mds_client *mdsc = fsc->mdsc; |
2951 | struct ceph_mds_request *req; | |
2952 | int mode = USE_AUTH_MDS; | |
2953 | int err; | |
2954 | char *xattr_value; | |
2955 | size_t xattr_value_len; | |
2956 | ||
2957 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETVXATTR, mode); | |
2958 | if (IS_ERR(req)) { | |
2959 | err = -ENOMEM; | |
2960 | goto out; | |
2961 | } | |
2962 | ||
6eb06c46 | 2963 | req->r_feature_needed = CEPHFS_FEATURE_OP_GETVXATTR; |
6ddf5f16 MC |
2964 | req->r_path2 = kstrdup(name, GFP_NOFS); |
2965 | if (!req->r_path2) { | |
2966 | err = -ENOMEM; | |
2967 | goto put; | |
2968 | } | |
2969 | ||
2970 | ihold(inode); | |
2971 | req->r_inode = inode; | |
2972 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
2973 | if (err < 0) | |
2974 | goto put; | |
2975 | ||
2976 | xattr_value = req->r_reply_info.xattr_info.xattr_value; | |
2977 | xattr_value_len = req->r_reply_info.xattr_info.xattr_value_len; | |
2978 | ||
38d46409 | 2979 | doutc(cl, "xattr_value_len:%zu, size:%zu\n", xattr_value_len, size); |
6ddf5f16 MC |
2980 | |
2981 | err = (int)xattr_value_len; | |
2982 | if (size == 0) | |
2983 | goto put; | |
2984 | ||
2985 | if (xattr_value_len > size) { | |
2986 | err = -ERANGE; | |
2987 | goto put; | |
2988 | } | |
2989 | ||
2990 | memcpy(value, xattr_value, xattr_value_len); | |
2991 | put: | |
2992 | ceph_mdsc_put_request(req); | |
2993 | out: | |
38d46409 | 2994 | doutc(cl, "result=%d\n", err); |
6ddf5f16 MC |
2995 | return err; |
2996 | } | |
2997 | ||
355da1eb SW |
2998 | |
2999 | /* | |
3000 | * Check inode permissions. We verify we have a valid value for | |
3001 | * the AUTH cap, then call the generic handler. | |
3002 | */ | |
4609e1f1 | 3003 | int ceph_permission(struct mnt_idmap *idmap, struct inode *inode, |
549c7297 | 3004 | int mask) |
355da1eb | 3005 | { |
b74c79e9 NP |
3006 | int err; |
3007 | ||
10556cb2 | 3008 | if (mask & MAY_NOT_BLOCK) |
b74c79e9 NP |
3009 | return -ECHILD; |
3010 | ||
508b32d8 | 3011 | err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); |
355da1eb SW |
3012 | |
3013 | if (!err) | |
8995375f | 3014 | err = generic_permission(idmap, inode, mask); |
355da1eb SW |
3015 | return err; |
3016 | } | |
3017 | ||
428bb68a | 3018 | /* Craft a mask of needed caps given a set of requested statx attrs. */ |
04fabb11 | 3019 | static int statx_to_caps(u32 want, umode_t mode) |
428bb68a JL |
3020 | { |
3021 | int mask = 0; | |
3022 | ||
f6102994 | 3023 | if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME|STATX_CHANGE_COOKIE)) |
428bb68a JL |
3024 | mask |= CEPH_CAP_AUTH_SHARED; |
3025 | ||
f6102994 | 3026 | if (want & (STATX_NLINK|STATX_CTIME|STATX_CHANGE_COOKIE)) { |
04fabb11 JL |
3027 | /* |
3028 | * The link count for directories depends on inode->i_subdirs, | |
3029 | * and that is only updated when Fs caps are held. | |
3030 | */ | |
3031 | if (S_ISDIR(mode)) | |
3032 | mask |= CEPH_CAP_FILE_SHARED; | |
3033 | else | |
3034 | mask |= CEPH_CAP_LINK_SHARED; | |
3035 | } | |
428bb68a | 3036 | |
f6102994 | 3037 | if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|STATX_BLOCKS|STATX_CHANGE_COOKIE)) |
428bb68a JL |
3038 | mask |= CEPH_CAP_FILE_SHARED; |
3039 | ||
f6102994 | 3040 | if (want & (STATX_CTIME|STATX_CHANGE_COOKIE)) |
428bb68a JL |
3041 | mask |= CEPH_CAP_XATTR_SHARED; |
3042 | ||
3043 | return mask; | |
3044 | } | |
3045 | ||
355da1eb | 3046 | /* |
428bb68a JL |
3047 | * Get all the attributes. If we have sufficient caps for the requested attrs, |
3048 | * then we can avoid talking to the MDS at all. | |
355da1eb | 3049 | */ |
b74d24f7 | 3050 | int ceph_getattr(struct mnt_idmap *idmap, const struct path *path, |
549c7297 | 3051 | struct kstat *stat, u32 request_mask, unsigned int flags) |
355da1eb | 3052 | { |
a528d35e | 3053 | struct inode *inode = d_inode(path->dentry); |
aa87052d | 3054 | struct super_block *sb = inode->i_sb; |
232d4b01 | 3055 | struct ceph_inode_info *ci = ceph_inode(inode); |
58981784 | 3056 | u32 valid_mask = STATX_BASIC_STATS; |
428bb68a | 3057 | int err = 0; |
355da1eb | 3058 | |
5d6451b1 JL |
3059 | if (ceph_inode_is_shutdown(inode)) |
3060 | return -ESTALE; | |
3061 | ||
428bb68a | 3062 | /* Skip the getattr altogether if we're asked not to sync */ |
261998c3 | 3063 | if ((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) { |
04fabb11 JL |
3064 | err = ceph_do_getattr(inode, |
3065 | statx_to_caps(request_mask, inode->i_mode), | |
3066 | flags & AT_STATX_FORCE_SYNC); | |
428bb68a JL |
3067 | if (err) |
3068 | return err; | |
3069 | } | |
3070 | ||
0513043e | 3071 | generic_fillattr(idmap, request_mask, inode, stat); |
ebce3eb2 | 3072 | stat->ino = ceph_present_inode(inode); |
58981784 JL |
3073 | |
3074 | /* | |
3075 | * btime on newly-allocated inodes is 0, so if this is still set to | |
3076 | * that, then assume that it's not valid. | |
3077 | */ | |
3078 | if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) { | |
3079 | stat->btime = ci->i_btime; | |
3080 | valid_mask |= STATX_BTIME; | |
3081 | } | |
3082 | ||
f6102994 JL |
3083 | if (request_mask & STATX_CHANGE_COOKIE) { |
3084 | stat->change_cookie = inode_peek_iversion_raw(inode); | |
3085 | valid_mask |= STATX_CHANGE_COOKIE; | |
3086 | } | |
3087 | ||
428bb68a | 3088 | if (ceph_snap(inode) == CEPH_NOSNAP) |
aa87052d | 3089 | stat->dev = sb->s_dev; |
428bb68a JL |
3090 | else |
3091 | stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0; | |
3092 | ||
3093 | if (S_ISDIR(inode->i_mode)) { | |
5995d90d | 3094 | if (ceph_test_mount_opt(ceph_sb_to_fs_client(sb), RBYTES)) { |
428bb68a | 3095 | stat->size = ci->i_rbytes; |
aa87052d XL |
3096 | } else if (ceph_snap(inode) == CEPH_SNAPDIR) { |
3097 | struct ceph_inode_info *pci; | |
3098 | struct ceph_snap_realm *realm; | |
3099 | struct inode *parent; | |
3100 | ||
3101 | parent = ceph_lookup_inode(sb, ceph_ino(inode)); | |
f86a4866 | 3102 | if (IS_ERR(parent)) |
aa87052d XL |
3103 | return PTR_ERR(parent); |
3104 | ||
3105 | pci = ceph_inode(parent); | |
3106 | spin_lock(&pci->i_ceph_lock); | |
3107 | realm = pci->i_snap_realm; | |
3108 | if (realm) | |
3109 | stat->size = realm->num_snaps; | |
3110 | else | |
3111 | stat->size = 0; | |
3112 | spin_unlock(&pci->i_ceph_lock); | |
3113 | iput(parent); | |
3114 | } else { | |
428bb68a | 3115 | stat->size = ci->i_files + ci->i_subdirs; |
aa87052d | 3116 | } |
428bb68a JL |
3117 | stat->blocks = 0; |
3118 | stat->blksize = 65536; | |
3119 | /* | |
3120 | * Some applications rely on the number of st_nlink | |
3121 | * value on directories to be either 0 (if unlinked) | |
3122 | * or 2 + number of subdirectories. | |
3123 | */ | |
3124 | if (stat->nlink == 1) | |
3125 | /* '.' + '..' + subdirs */ | |
3126 | stat->nlink = 1 + 1 + ci->i_subdirs; | |
355da1eb | 3127 | } |
428bb68a | 3128 | |
f6102994 | 3129 | stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC; |
94af0470 JL |
3130 | if (IS_ENCRYPTED(inode)) |
3131 | stat->attributes |= STATX_ATTR_ENCRYPTED; | |
3132 | stat->attributes_mask |= (STATX_ATTR_CHANGE_MONOTONIC | | |
3133 | STATX_ATTR_ENCRYPTED); | |
3134 | ||
58981784 | 3135 | stat->result_mask = request_mask & valid_mask; |
355da1eb SW |
3136 | return err; |
3137 | } | |
5d6451b1 JL |
3138 | |
3139 | void ceph_inode_shutdown(struct inode *inode) | |
3140 | { | |
3141 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3142 | struct rb_node *p; | |
3143 | int iputs = 0; | |
3144 | bool invalidate = false; | |
3145 | ||
3146 | spin_lock(&ci->i_ceph_lock); | |
3147 | ci->i_ceph_flags |= CEPH_I_SHUTDOWN; | |
3148 | p = rb_first(&ci->i_caps); | |
3149 | while (p) { | |
3150 | struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); | |
3151 | ||
3152 | p = rb_next(p); | |
3153 | iputs += ceph_purge_inode_cap(inode, cap, &invalidate); | |
3154 | } | |
3155 | spin_unlock(&ci->i_ceph_lock); | |
3156 | ||
3157 | if (invalidate) | |
3158 | ceph_queue_invalidate(inode); | |
3159 | while (iputs--) | |
3160 | iput(inode); | |
3161 | } |