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Commit | Line | Data |
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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
2817b000 SW |
2 | |
3 | #include <linux/spinlock.h> | |
4 | #include <linux/fs_struct.h> | |
5 | #include <linux/namei.h> | |
5a0e3ad6 | 6 | #include <linux/slab.h> |
2817b000 SW |
7 | #include <linux/sched.h> |
8 | ||
9 | #include "super.h" | |
3d14c5d2 | 10 | #include "mds_client.h" |
2817b000 SW |
11 | |
12 | /* | |
13 | * Directory operations: readdir, lookup, create, link, unlink, | |
14 | * rename, etc. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Ceph MDS operations are specified in terms of a base ino and | |
19 | * relative path. Thus, the client can specify an operation on a | |
20 | * specific inode (e.g., a getattr due to fstat(2)), or as a path | |
21 | * relative to, say, the root directory. | |
22 | * | |
23 | * Normally, we limit ourselves to strict inode ops (no path component) | |
24 | * or dentry operations (a single path component relative to an ino). The | |
25 | * exception to this is open_root_dentry(), which will open the mount | |
26 | * point by name. | |
27 | */ | |
28 | ||
52dfb8ac | 29 | const struct dentry_operations ceph_dentry_ops; |
2817b000 SW |
30 | |
31 | /* | |
32 | * Initialize ceph dentry state. | |
33 | */ | |
34 | int ceph_init_dentry(struct dentry *dentry) | |
35 | { | |
36 | struct ceph_dentry_info *di; | |
37 | ||
38 | if (dentry->d_fsdata) | |
39 | return 0; | |
40 | ||
99ec2697 | 41 | di = kmem_cache_zalloc(ceph_dentry_cachep, GFP_KERNEL); |
2817b000 SW |
42 | if (!di) |
43 | return -ENOMEM; /* oh well */ | |
44 | ||
45 | spin_lock(&dentry->d_lock); | |
8c6efb58 SW |
46 | if (dentry->d_fsdata) { |
47 | /* lost a race */ | |
48 | kmem_cache_free(ceph_dentry_cachep, di); | |
2817b000 | 49 | goto out_unlock; |
8c6efb58 | 50 | } |
48d0cbd1 | 51 | |
2b0143b5 | 52 | if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_NOSNAP) |
48d0cbd1 | 53 | d_set_d_op(dentry, &ceph_dentry_ops); |
2b0143b5 | 54 | else if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_SNAPDIR) |
48d0cbd1 SW |
55 | d_set_d_op(dentry, &ceph_snapdir_dentry_ops); |
56 | else | |
57 | d_set_d_op(dentry, &ceph_snap_dentry_ops); | |
58 | ||
2817b000 SW |
59 | di->dentry = dentry; |
60 | di->lease_session = NULL; | |
2817b000 | 61 | dentry->d_time = jiffies; |
48d0cbd1 SW |
62 | /* avoid reordering d_fsdata setup so that the check above is safe */ |
63 | smp_mb(); | |
64 | dentry->d_fsdata = di; | |
2817b000 SW |
65 | ceph_dentry_lru_add(dentry); |
66 | out_unlock: | |
67 | spin_unlock(&dentry->d_lock); | |
68 | return 0; | |
69 | } | |
70 | ||
2817b000 SW |
71 | /* |
72 | * for readdir, we encode the directory frag and offset within that | |
73 | * frag into f_pos. | |
74 | */ | |
75 | static unsigned fpos_frag(loff_t p) | |
76 | { | |
77 | return p >> 32; | |
78 | } | |
79 | static unsigned fpos_off(loff_t p) | |
80 | { | |
81 | return p & 0xffffffff; | |
82 | } | |
83 | ||
4d5f5df6 YZ |
84 | static int fpos_cmp(loff_t l, loff_t r) |
85 | { | |
86 | int v = ceph_frag_compare(fpos_frag(l), fpos_frag(r)); | |
87 | if (v) | |
88 | return v; | |
89 | return (int)(fpos_off(l) - fpos_off(r)); | |
90 | } | |
91 | ||
fdd4e158 YZ |
92 | /* |
93 | * make note of the last dentry we read, so we can | |
94 | * continue at the same lexicographical point, | |
95 | * regardless of what dir changes take place on the | |
96 | * server. | |
97 | */ | |
98 | static int note_last_dentry(struct ceph_file_info *fi, const char *name, | |
99 | int len, unsigned next_offset) | |
100 | { | |
101 | char *buf = kmalloc(len+1, GFP_KERNEL); | |
102 | if (!buf) | |
103 | return -ENOMEM; | |
104 | kfree(fi->last_name); | |
105 | fi->last_name = buf; | |
106 | memcpy(fi->last_name, name, len); | |
107 | fi->last_name[len] = 0; | |
108 | fi->next_offset = next_offset; | |
109 | dout("note_last_dentry '%s'\n", fi->last_name); | |
110 | return 0; | |
111 | } | |
112 | ||
c530cd24 YZ |
113 | |
114 | static struct dentry * | |
115 | __dcache_find_get_entry(struct dentry *parent, u64 idx, | |
116 | struct ceph_readdir_cache_control *cache_ctl) | |
117 | { | |
118 | struct inode *dir = d_inode(parent); | |
119 | struct dentry *dentry; | |
120 | unsigned idx_mask = (PAGE_SIZE / sizeof(struct dentry *)) - 1; | |
121 | loff_t ptr_pos = idx * sizeof(struct dentry *); | |
122 | pgoff_t ptr_pgoff = ptr_pos >> PAGE_SHIFT; | |
123 | ||
124 | if (ptr_pos >= i_size_read(dir)) | |
125 | return NULL; | |
126 | ||
127 | if (!cache_ctl->page || ptr_pgoff != page_index(cache_ctl->page)) { | |
128 | ceph_readdir_cache_release(cache_ctl); | |
129 | cache_ctl->page = find_lock_page(&dir->i_data, ptr_pgoff); | |
130 | if (!cache_ctl->page) { | |
131 | dout(" page %lu not found\n", ptr_pgoff); | |
132 | return ERR_PTR(-EAGAIN); | |
133 | } | |
134 | /* reading/filling the cache are serialized by | |
135 | i_mutex, no need to use page lock */ | |
136 | unlock_page(cache_ctl->page); | |
137 | cache_ctl->dentries = kmap(cache_ctl->page); | |
138 | } | |
139 | ||
140 | cache_ctl->index = idx & idx_mask; | |
141 | ||
142 | rcu_read_lock(); | |
143 | spin_lock(&parent->d_lock); | |
144 | /* check i_size again here, because empty directory can be | |
145 | * marked as complete while not holding the i_mutex. */ | |
146 | if (ceph_dir_is_complete_ordered(dir) && ptr_pos < i_size_read(dir)) | |
147 | dentry = cache_ctl->dentries[cache_ctl->index]; | |
148 | else | |
149 | dentry = NULL; | |
150 | spin_unlock(&parent->d_lock); | |
151 | if (dentry && !lockref_get_not_dead(&dentry->d_lockref)) | |
152 | dentry = NULL; | |
153 | rcu_read_unlock(); | |
154 | return dentry ? : ERR_PTR(-EAGAIN); | |
155 | } | |
156 | ||
2817b000 SW |
157 | /* |
158 | * When possible, we try to satisfy a readdir by peeking at the | |
159 | * dcache. We make this work by carefully ordering dentries on | |
946e51f2 | 160 | * d_child when we initially get results back from the MDS, and |
2817b000 SW |
161 | * falling back to a "normal" sync readdir if any dentries in the dir |
162 | * are dropped. | |
163 | * | |
2f276c51 | 164 | * Complete dir indicates that we have all dentries in the dir. It is |
2817b000 SW |
165 | * defined IFF we hold CEPH_CAP_FILE_SHARED (which will be revoked by |
166 | * the MDS if/when the directory is modified). | |
167 | */ | |
a30be7cb YZ |
168 | static int __dcache_readdir(struct file *file, struct dir_context *ctx, |
169 | u32 shared_gen) | |
2817b000 | 170 | { |
77acfa29 | 171 | struct ceph_file_info *fi = file->private_data; |
b583043e | 172 | struct dentry *parent = file->f_path.dentry; |
2b0143b5 | 173 | struct inode *dir = d_inode(parent); |
fdd4e158 | 174 | struct dentry *dentry, *last = NULL; |
2817b000 | 175 | struct ceph_dentry_info *di; |
fdd4e158 | 176 | struct ceph_readdir_cache_control cache_ctl = {}; |
c530cd24 YZ |
177 | u64 idx = 0; |
178 | int err = 0; | |
2817b000 | 179 | |
fdd4e158 | 180 | dout("__dcache_readdir %p v%u at %llu\n", dir, shared_gen, ctx->pos); |
2817b000 | 181 | |
c530cd24 YZ |
182 | /* search start position */ |
183 | if (ctx->pos > 2) { | |
184 | u64 count = div_u64(i_size_read(dir), sizeof(struct dentry *)); | |
185 | while (count > 0) { | |
186 | u64 step = count >> 1; | |
187 | dentry = __dcache_find_get_entry(parent, idx + step, | |
188 | &cache_ctl); | |
189 | if (!dentry) { | |
190 | /* use linar search */ | |
191 | idx = 0; | |
192 | break; | |
193 | } | |
194 | if (IS_ERR(dentry)) { | |
195 | err = PTR_ERR(dentry); | |
196 | goto out; | |
197 | } | |
198 | di = ceph_dentry(dentry); | |
199 | spin_lock(&dentry->d_lock); | |
200 | if (fpos_cmp(di->offset, ctx->pos) < 0) { | |
201 | idx += step + 1; | |
202 | count -= step + 1; | |
203 | } else { | |
204 | count = step; | |
205 | } | |
206 | spin_unlock(&dentry->d_lock); | |
207 | dput(dentry); | |
208 | } | |
209 | ||
210 | dout("__dcache_readdir %p cache idx %llu\n", dir, idx); | |
2817b000 SW |
211 | } |
212 | ||
fdd4e158 | 213 | |
c530cd24 YZ |
214 | for (;;) { |
215 | bool emit_dentry = false; | |
216 | dentry = __dcache_find_get_entry(parent, idx++, &cache_ctl); | |
217 | if (!dentry) { | |
9cfa1098 | 218 | fi->flags |= CEPH_F_ATEND; |
fdd4e158 YZ |
219 | err = 0; |
220 | break; | |
2817b000 | 221 | } |
c530cd24 YZ |
222 | if (IS_ERR(dentry)) { |
223 | err = PTR_ERR(dentry); | |
224 | goto out; | |
fdd4e158 YZ |
225 | } |
226 | ||
fdd4e158 YZ |
227 | di = ceph_dentry(dentry); |
228 | spin_lock(&dentry->d_lock); | |
a30be7cb | 229 | if (di->lease_shared_gen == shared_gen && |
fdd4e158 | 230 | d_really_is_positive(dentry) && |
fdd4e158 YZ |
231 | fpos_cmp(ctx->pos, di->offset) <= 0) { |
232 | emit_dentry = true; | |
233 | } | |
da502956 | 234 | spin_unlock(&dentry->d_lock); |
2817b000 | 235 | |
fdd4e158 YZ |
236 | if (emit_dentry) { |
237 | dout(" %llu (%llu) dentry %p %pd %p\n", di->offset, ctx->pos, | |
238 | dentry, dentry, d_inode(dentry)); | |
239 | ctx->pos = di->offset; | |
240 | if (!dir_emit(ctx, dentry->d_name.name, | |
241 | dentry->d_name.len, | |
242 | ceph_translate_ino(dentry->d_sb, | |
243 | d_inode(dentry)->i_ino), | |
244 | d_inode(dentry)->i_mode >> 12)) { | |
245 | dput(dentry); | |
246 | err = 0; | |
247 | break; | |
248 | } | |
249 | ctx->pos++; | |
0081bd83 | 250 | |
fdd4e158 YZ |
251 | if (last) |
252 | dput(last); | |
253 | last = dentry; | |
254 | } else { | |
255 | dput(dentry); | |
2817b000 | 256 | } |
fdd4e158 | 257 | } |
c530cd24 | 258 | out: |
fdd4e158 YZ |
259 | ceph_readdir_cache_release(&cache_ctl); |
260 | if (last) { | |
261 | int ret; | |
262 | di = ceph_dentry(last); | |
263 | ret = note_last_dentry(fi, last->d_name.name, last->d_name.len, | |
264 | fpos_off(di->offset) + 1); | |
265 | if (ret < 0) | |
266 | err = ret; | |
2817b000 | 267 | dput(last); |
fdd4e158 | 268 | } |
2817b000 SW |
269 | return err; |
270 | } | |
271 | ||
77acfa29 | 272 | static int ceph_readdir(struct file *file, struct dir_context *ctx) |
2817b000 | 273 | { |
77acfa29 AV |
274 | struct ceph_file_info *fi = file->private_data; |
275 | struct inode *inode = file_inode(file); | |
2817b000 | 276 | struct ceph_inode_info *ci = ceph_inode(inode); |
3d14c5d2 YS |
277 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
278 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
77acfa29 AV |
279 | unsigned frag = fpos_frag(ctx->pos); |
280 | int off = fpos_off(ctx->pos); | |
2817b000 SW |
281 | int err; |
282 | u32 ftype; | |
283 | struct ceph_mds_reply_info_parsed *rinfo; | |
2817b000 | 284 | |
77acfa29 | 285 | dout("readdir %p file %p frag %u off %u\n", inode, file, frag, off); |
9cfa1098 | 286 | if (fi->flags & CEPH_F_ATEND) |
2817b000 SW |
287 | return 0; |
288 | ||
289 | /* always start with . and .. */ | |
77acfa29 | 290 | if (ctx->pos == 0) { |
2817b000 | 291 | dout("readdir off 0 -> '.'\n"); |
77acfa29 | 292 | if (!dir_emit(ctx, ".", 1, |
ad1fee96 | 293 | ceph_translate_ino(inode->i_sb, inode->i_ino), |
77acfa29 | 294 | inode->i_mode >> 12)) |
2817b000 | 295 | return 0; |
77acfa29 | 296 | ctx->pos = 1; |
2817b000 SW |
297 | off = 1; |
298 | } | |
77acfa29 | 299 | if (ctx->pos == 1) { |
b583043e | 300 | ino_t ino = parent_ino(file->f_path.dentry); |
2817b000 | 301 | dout("readdir off 1 -> '..'\n"); |
77acfa29 | 302 | if (!dir_emit(ctx, "..", 2, |
ad1fee96 | 303 | ceph_translate_ino(inode->i_sb, ino), |
77acfa29 | 304 | inode->i_mode >> 12)) |
2817b000 | 305 | return 0; |
77acfa29 | 306 | ctx->pos = 2; |
2817b000 SW |
307 | off = 2; |
308 | } | |
309 | ||
310 | /* can we use the dcache? */ | |
be655596 | 311 | spin_lock(&ci->i_ceph_lock); |
fdd4e158 | 312 | if (ceph_test_mount_opt(fsc, DCACHE) && |
3d14c5d2 | 313 | !ceph_test_mount_opt(fsc, NOASYNCREADDIR) && |
a0dff78d | 314 | ceph_snap(inode) != CEPH_SNAPDIR && |
70db4f36 | 315 | __ceph_dir_is_complete_ordered(ci) && |
2817b000 | 316 | __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) { |
a30be7cb | 317 | u32 shared_gen = ci->i_shared_gen; |
be655596 | 318 | spin_unlock(&ci->i_ceph_lock); |
a30be7cb | 319 | err = __dcache_readdir(file, ctx, shared_gen); |
efa4c120 | 320 | if (err != -EAGAIN) |
2817b000 | 321 | return err; |
0081bd83 YZ |
322 | frag = fpos_frag(ctx->pos); |
323 | off = fpos_off(ctx->pos); | |
efa4c120 | 324 | } else { |
be655596 | 325 | spin_unlock(&ci->i_ceph_lock); |
2817b000 | 326 | } |
2817b000 SW |
327 | |
328 | /* proceed with a normal readdir */ | |
2817b000 SW |
329 | more: |
330 | /* do we have the correct frag content buffered? */ | |
331 | if (fi->frag != frag || fi->last_readdir == NULL) { | |
332 | struct ceph_mds_request *req; | |
333 | int op = ceph_snap(inode) == CEPH_SNAPDIR ? | |
334 | CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR; | |
335 | ||
336 | /* discard old result, if any */ | |
393f6620 | 337 | if (fi->last_readdir) { |
2817b000 | 338 | ceph_mdsc_put_request(fi->last_readdir); |
393f6620 SW |
339 | fi->last_readdir = NULL; |
340 | } | |
2817b000 | 341 | |
2817b000 SW |
342 | dout("readdir fetching %llx.%llx frag %x offset '%s'\n", |
343 | ceph_vinop(inode), frag, fi->last_name); | |
344 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); | |
345 | if (IS_ERR(req)) | |
346 | return PTR_ERR(req); | |
54008399 YZ |
347 | err = ceph_alloc_readdir_reply_buffer(req, inode); |
348 | if (err) { | |
349 | ceph_mdsc_put_request(req); | |
350 | return err; | |
351 | } | |
2817b000 SW |
352 | /* hints to request -> mds selection code */ |
353 | req->r_direct_mode = USE_AUTH_MDS; | |
354 | req->r_direct_hash = ceph_frag_value(frag); | |
355 | req->r_direct_is_hash = true; | |
a149bb9a | 356 | if (fi->last_name) { |
687265e5 | 357 | req->r_path2 = kstrdup(fi->last_name, GFP_KERNEL); |
a149bb9a SK |
358 | if (!req->r_path2) { |
359 | ceph_mdsc_put_request(req); | |
360 | return -ENOMEM; | |
361 | } | |
362 | } | |
fdd4e158 YZ |
363 | req->r_dir_release_cnt = fi->dir_release_count; |
364 | req->r_dir_ordered_cnt = fi->dir_ordered_count; | |
365 | req->r_readdir_cache_idx = fi->readdir_cache_idx; | |
2817b000 SW |
366 | req->r_readdir_offset = fi->next_offset; |
367 | req->r_args.readdir.frag = cpu_to_le32(frag); | |
956d39d6 YZ |
368 | req->r_args.readdir.flags = |
369 | cpu_to_le16(CEPH_READDIR_REPLY_BITFLAGS); | |
a149bb9a SK |
370 | |
371 | req->r_inode = inode; | |
372 | ihold(inode); | |
373 | req->r_dentry = dget(file->f_path.dentry); | |
2817b000 SW |
374 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
375 | if (err < 0) { | |
376 | ceph_mdsc_put_request(req); | |
377 | return err; | |
378 | } | |
379 | dout("readdir got and parsed readdir result=%d" | |
380 | " on frag %x, end=%d, complete=%d\n", err, frag, | |
381 | (int)req->r_reply_info.dir_end, | |
382 | (int)req->r_reply_info.dir_complete); | |
383 | ||
2817b000 SW |
384 | |
385 | /* note next offset and last dentry name */ | |
81c6aea5 YZ |
386 | rinfo = &req->r_reply_info; |
387 | if (le32_to_cpu(rinfo->dir_dir->frag) != frag) { | |
388 | frag = le32_to_cpu(rinfo->dir_dir->frag); | |
fdd4e158 YZ |
389 | off = req->r_readdir_offset; |
390 | fi->next_offset = off; | |
81c6aea5 | 391 | } |
fdd4e158 | 392 | |
f0494206 | 393 | fi->frag = frag; |
2817b000 SW |
394 | fi->offset = fi->next_offset; |
395 | fi->last_readdir = req; | |
396 | ||
fdd4e158 YZ |
397 | if (req->r_did_prepopulate) { |
398 | fi->readdir_cache_idx = req->r_readdir_cache_idx; | |
399 | if (fi->readdir_cache_idx < 0) { | |
400 | /* preclude from marking dir ordered */ | |
401 | fi->dir_ordered_count = 0; | |
402 | } else if (ceph_frag_is_leftmost(frag) && off == 2) { | |
403 | /* note dir version at start of readdir so | |
404 | * we can tell if any dentries get dropped */ | |
405 | fi->dir_release_count = req->r_dir_release_cnt; | |
406 | fi->dir_ordered_count = req->r_dir_ordered_cnt; | |
407 | } | |
408 | } else { | |
409 | dout("readdir !did_prepopulate"); | |
410 | /* disable readdir cache */ | |
411 | fi->readdir_cache_idx = -1; | |
412 | /* preclude from marking dir complete */ | |
413 | fi->dir_release_count = 0; | |
414 | } | |
415 | ||
2817b000 SW |
416 | if (req->r_reply_info.dir_end) { |
417 | kfree(fi->last_name); | |
418 | fi->last_name = NULL; | |
a78600e7 | 419 | fi->next_offset = 2; |
2817b000 | 420 | } else { |
2a5beea3 YZ |
421 | struct ceph_mds_reply_dir_entry *rde = |
422 | rinfo->dir_entries + (rinfo->dir_nr-1); | |
423 | err = note_last_dentry(fi, rde->name, rde->name_len, | |
fdd4e158 | 424 | fi->next_offset + rinfo->dir_nr); |
2817b000 SW |
425 | if (err) |
426 | return err; | |
2817b000 SW |
427 | } |
428 | } | |
429 | ||
430 | rinfo = &fi->last_readdir->r_reply_info; | |
431 | dout("readdir frag %x num %d off %d chunkoff %d\n", frag, | |
432 | rinfo->dir_nr, off, fi->offset); | |
77acfa29 AV |
433 | |
434 | ctx->pos = ceph_make_fpos(frag, off); | |
da39822c | 435 | while (off >= fi->offset && off - fi->offset < rinfo->dir_nr) { |
2a5beea3 YZ |
436 | struct ceph_mds_reply_dir_entry *rde = |
437 | rinfo->dir_entries + (off - fi->offset); | |
3105c19c SW |
438 | struct ceph_vino vino; |
439 | ino_t ino; | |
440 | ||
2817b000 | 441 | dout("readdir off %d (%d/%d) -> %lld '%.*s' %p\n", |
77acfa29 | 442 | off, off - fi->offset, rinfo->dir_nr, ctx->pos, |
2a5beea3 YZ |
443 | rde->name_len, rde->name, &rde->inode.in); |
444 | BUG_ON(!rde->inode.in); | |
445 | ftype = le32_to_cpu(rde->inode.in->mode) >> 12; | |
446 | vino.ino = le64_to_cpu(rde->inode.in->ino); | |
447 | vino.snap = le64_to_cpu(rde->inode.in->snapid); | |
3105c19c | 448 | ino = ceph_vino_to_ino(vino); |
2a5beea3 YZ |
449 | if (!dir_emit(ctx, rde->name, rde->name_len, |
450 | ceph_translate_ino(inode->i_sb, ino), ftype)) { | |
2817b000 SW |
451 | dout("filldir stopping us...\n"); |
452 | return 0; | |
453 | } | |
454 | off++; | |
77acfa29 | 455 | ctx->pos++; |
2817b000 SW |
456 | } |
457 | ||
458 | if (fi->last_name) { | |
459 | ceph_mdsc_put_request(fi->last_readdir); | |
460 | fi->last_readdir = NULL; | |
461 | goto more; | |
462 | } | |
463 | ||
464 | /* more frags? */ | |
465 | if (!ceph_frag_is_rightmost(frag)) { | |
466 | frag = ceph_frag_next(frag); | |
a78600e7 | 467 | off = 2; |
77acfa29 | 468 | ctx->pos = ceph_make_fpos(frag, off); |
2817b000 SW |
469 | dout("readdir next frag is %x\n", frag); |
470 | goto more; | |
471 | } | |
9cfa1098 | 472 | fi->flags |= CEPH_F_ATEND; |
2817b000 SW |
473 | |
474 | /* | |
475 | * if dir_release_count still matches the dir, no dentries | |
476 | * were released during the whole readdir, and we should have | |
477 | * the complete dir contents in our cache. | |
478 | */ | |
fdd4e158 YZ |
479 | if (atomic64_read(&ci->i_release_count) == fi->dir_release_count) { |
480 | spin_lock(&ci->i_ceph_lock); | |
481 | if (fi->dir_ordered_count == atomic64_read(&ci->i_ordered_count)) { | |
70db4f36 | 482 | dout(" marking %p complete and ordered\n", inode); |
fdd4e158 YZ |
483 | /* use i_size to track number of entries in |
484 | * readdir cache */ | |
485 | BUG_ON(fi->readdir_cache_idx < 0); | |
486 | i_size_write(inode, fi->readdir_cache_idx * | |
487 | sizeof(struct dentry*)); | |
488 | } else { | |
70db4f36 | 489 | dout(" marking %p complete\n", inode); |
fdd4e158 | 490 | } |
70db4f36 YZ |
491 | __ceph_dir_set_complete(ci, fi->dir_release_count, |
492 | fi->dir_ordered_count); | |
fdd4e158 | 493 | spin_unlock(&ci->i_ceph_lock); |
2817b000 | 494 | } |
2817b000 | 495 | |
77acfa29 | 496 | dout("readdir %p file %p done.\n", inode, file); |
2817b000 SW |
497 | return 0; |
498 | } | |
499 | ||
dcd3cc05 | 500 | static void reset_readdir(struct ceph_file_info *fi, unsigned frag) |
2817b000 SW |
501 | { |
502 | if (fi->last_readdir) { | |
503 | ceph_mdsc_put_request(fi->last_readdir); | |
504 | fi->last_readdir = NULL; | |
505 | } | |
506 | kfree(fi->last_name); | |
a1629c3b | 507 | fi->last_name = NULL; |
fdd4e158 YZ |
508 | fi->dir_release_count = 0; |
509 | fi->readdir_cache_idx = -1; | |
a78600e7 | 510 | fi->next_offset = 2; /* compensate for . and .. */ |
9cfa1098 | 511 | fi->flags &= ~CEPH_F_ATEND; |
2817b000 SW |
512 | } |
513 | ||
965c8e59 | 514 | static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence) |
2817b000 SW |
515 | { |
516 | struct ceph_file_info *fi = file->private_data; | |
517 | struct inode *inode = file->f_mapping->host; | |
f0494206 | 518 | loff_t old_offset = ceph_make_fpos(fi->frag, fi->next_offset); |
2817b000 SW |
519 | loff_t retval; |
520 | ||
5955102c | 521 | inode_lock(inode); |
06222e49 | 522 | retval = -EINVAL; |
965c8e59 | 523 | switch (whence) { |
2817b000 SW |
524 | case SEEK_CUR: |
525 | offset += file->f_pos; | |
06222e49 JB |
526 | case SEEK_SET: |
527 | break; | |
fdd4e158 YZ |
528 | case SEEK_END: |
529 | retval = -EOPNOTSUPP; | |
06222e49 JB |
530 | default: |
531 | goto out; | |
2817b000 | 532 | } |
06222e49 | 533 | |
f0494206 | 534 | if (offset >= 0) { |
2817b000 SW |
535 | if (offset != file->f_pos) { |
536 | file->f_pos = offset; | |
537 | file->f_version = 0; | |
9cfa1098 | 538 | fi->flags &= ~CEPH_F_ATEND; |
2817b000 SW |
539 | } |
540 | retval = offset; | |
541 | ||
2817b000 | 542 | if (offset == 0 || |
f0494206 | 543 | fpos_frag(offset) != fi->frag || |
2817b000 | 544 | fpos_off(offset) < fi->offset) { |
fdd4e158 YZ |
545 | /* discard buffered readdir content on seekdir(0), or |
546 | * seek to new frag, or seek prior to current chunk */ | |
2817b000 | 547 | dout("dir_llseek dropping %p content\n", file); |
dcd3cc05 | 548 | reset_readdir(fi, fpos_frag(offset)); |
fdd4e158 YZ |
549 | } else if (fpos_cmp(offset, old_offset) > 0) { |
550 | /* reset dir_release_count if we did a forward seek */ | |
551 | fi->dir_release_count = 0; | |
552 | fi->readdir_cache_idx = -1; | |
2817b000 | 553 | } |
2817b000 | 554 | } |
06222e49 | 555 | out: |
5955102c | 556 | inode_unlock(inode); |
2817b000 SW |
557 | return retval; |
558 | } | |
559 | ||
560 | /* | |
468640e3 | 561 | * Handle lookups for the hidden .snap directory. |
2817b000 | 562 | */ |
468640e3 SW |
563 | int ceph_handle_snapdir(struct ceph_mds_request *req, |
564 | struct dentry *dentry, int err) | |
2817b000 | 565 | { |
3d14c5d2 | 566 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
2b0143b5 | 567 | struct inode *parent = d_inode(dentry->d_parent); /* we hold i_mutex */ |
2817b000 SW |
568 | |
569 | /* .snap dir? */ | |
570 | if (err == -ENOENT && | |
455cec0a | 571 | ceph_snap(parent) == CEPH_NOSNAP && |
6b805185 | 572 | strcmp(dentry->d_name.name, |
3d14c5d2 | 573 | fsc->mount_options->snapdir_name) == 0) { |
2817b000 | 574 | struct inode *inode = ceph_get_snapdir(parent); |
a455589f AV |
575 | dout("ENOENT on snapdir %p '%pd', linking to snapdir %p\n", |
576 | dentry, dentry, inode); | |
9358c6d4 | 577 | BUG_ON(!d_unhashed(dentry)); |
2817b000 SW |
578 | d_add(dentry, inode); |
579 | err = 0; | |
580 | } | |
468640e3 SW |
581 | return err; |
582 | } | |
2817b000 | 583 | |
468640e3 SW |
584 | /* |
585 | * Figure out final result of a lookup/open request. | |
586 | * | |
587 | * Mainly, make sure we return the final req->r_dentry (if it already | |
588 | * existed) in place of the original VFS-provided dentry when they | |
589 | * differ. | |
590 | * | |
591 | * Gracefully handle the case where the MDS replies with -ENOENT and | |
592 | * no trace (which it may do, at its discretion, e.g., if it doesn't | |
593 | * care to issue a lease on the negative dentry). | |
594 | */ | |
595 | struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, | |
596 | struct dentry *dentry, int err) | |
597 | { | |
2817b000 SW |
598 | if (err == -ENOENT) { |
599 | /* no trace? */ | |
600 | err = 0; | |
601 | if (!req->r_reply_info.head->is_dentry) { | |
602 | dout("ENOENT and no trace, dentry %p inode %p\n", | |
2b0143b5 DH |
603 | dentry, d_inode(dentry)); |
604 | if (d_really_is_positive(dentry)) { | |
2817b000 SW |
605 | d_drop(dentry); |
606 | err = -ENOENT; | |
607 | } else { | |
608 | d_add(dentry, NULL); | |
609 | } | |
610 | } | |
611 | } | |
612 | if (err) | |
613 | dentry = ERR_PTR(err); | |
614 | else if (dentry != req->r_dentry) | |
615 | dentry = dget(req->r_dentry); /* we got spliced */ | |
616 | else | |
617 | dentry = NULL; | |
618 | return dentry; | |
619 | } | |
620 | ||
1d1de916 SW |
621 | static int is_root_ceph_dentry(struct inode *inode, struct dentry *dentry) |
622 | { | |
623 | return ceph_ino(inode) == CEPH_INO_ROOT && | |
624 | strncmp(dentry->d_name.name, ".ceph", 5) == 0; | |
625 | } | |
626 | ||
2817b000 SW |
627 | /* |
628 | * Look up a single dir entry. If there is a lookup intent, inform | |
629 | * the MDS so that it gets our 'caps wanted' value in a single op. | |
630 | */ | |
631 | static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry, | |
00cd8dd3 | 632 | unsigned int flags) |
2817b000 | 633 | { |
3d14c5d2 YS |
634 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
635 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
636 | struct ceph_mds_request *req; |
637 | int op; | |
315f2408 | 638 | int mask; |
2817b000 SW |
639 | int err; |
640 | ||
a455589f AV |
641 | dout("lookup %p dentry %p '%pd'\n", |
642 | dir, dentry, dentry); | |
2817b000 SW |
643 | |
644 | if (dentry->d_name.len > NAME_MAX) | |
645 | return ERR_PTR(-ENAMETOOLONG); | |
646 | ||
647 | err = ceph_init_dentry(dentry); | |
648 | if (err < 0) | |
649 | return ERR_PTR(err); | |
650 | ||
2817b000 | 651 | /* can we conclude ENOENT locally? */ |
2b0143b5 | 652 | if (d_really_is_negative(dentry)) { |
2817b000 SW |
653 | struct ceph_inode_info *ci = ceph_inode(dir); |
654 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
655 | ||
be655596 | 656 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
657 | dout(" dir %p flags are %d\n", dir, ci->i_ceph_flags); |
658 | if (strncmp(dentry->d_name.name, | |
3d14c5d2 | 659 | fsc->mount_options->snapdir_name, |
2817b000 | 660 | dentry->d_name.len) && |
1d1de916 | 661 | !is_root_ceph_dentry(dir, dentry) && |
e2c3de04 | 662 | ceph_test_mount_opt(fsc, DCACHE) && |
2f276c51 | 663 | __ceph_dir_is_complete(ci) && |
2817b000 | 664 | (__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) { |
be655596 | 665 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
666 | dout(" dir %p complete, -ENOENT\n", dir); |
667 | d_add(dentry, NULL); | |
668 | di->lease_shared_gen = ci->i_shared_gen; | |
669 | return NULL; | |
670 | } | |
be655596 | 671 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
672 | } |
673 | ||
674 | op = ceph_snap(dir) == CEPH_SNAPDIR ? | |
675 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; | |
676 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); | |
677 | if (IS_ERR(req)) | |
7e34bc52 | 678 | return ERR_CAST(req); |
2817b000 SW |
679 | req->r_dentry = dget(dentry); |
680 | req->r_num_caps = 2; | |
315f2408 YZ |
681 | |
682 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
683 | if (ceph_security_xattr_wanted(dir)) | |
684 | mask |= CEPH_CAP_XATTR_SHARED; | |
685 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
686 | ||
2817b000 SW |
687 | req->r_locked_dir = dir; |
688 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
468640e3 | 689 | err = ceph_handle_snapdir(req, dentry, err); |
2817b000 SW |
690 | dentry = ceph_finish_lookup(req, dentry, err); |
691 | ceph_mdsc_put_request(req); /* will dput(dentry) */ | |
692 | dout("lookup result=%p\n", dentry); | |
693 | return dentry; | |
694 | } | |
695 | ||
696 | /* | |
697 | * If we do a create but get no trace back from the MDS, follow up with | |
698 | * a lookup (the VFS expects us to link up the provided dentry). | |
699 | */ | |
700 | int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry) | |
701 | { | |
00cd8dd3 | 702 | struct dentry *result = ceph_lookup(dir, dentry, 0); |
2817b000 SW |
703 | |
704 | if (result && !IS_ERR(result)) { | |
705 | /* | |
706 | * We created the item, then did a lookup, and found | |
707 | * it was already linked to another inode we already | |
4d41cef2 YZ |
708 | * had in our cache (and thus got spliced). To not |
709 | * confuse VFS (especially when inode is a directory), | |
710 | * we don't link our dentry to that inode, return an | |
711 | * error instead. | |
712 | * | |
713 | * This event should be rare and it happens only when | |
714 | * we talk to old MDS. Recent MDS does not send traceless | |
715 | * reply for request that creates new inode. | |
2817b000 | 716 | */ |
5cba372c | 717 | d_drop(result); |
4d41cef2 | 718 | return -ESTALE; |
2817b000 SW |
719 | } |
720 | return PTR_ERR(result); | |
721 | } | |
722 | ||
723 | static int ceph_mknod(struct inode *dir, struct dentry *dentry, | |
1a67aafb | 724 | umode_t mode, dev_t rdev) |
2817b000 | 725 | { |
3d14c5d2 YS |
726 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
727 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 728 | struct ceph_mds_request *req; |
b1ee94aa | 729 | struct ceph_acls_info acls = {}; |
2817b000 SW |
730 | int err; |
731 | ||
732 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
733 | return -EROFS; | |
734 | ||
b1ee94aa YZ |
735 | err = ceph_pre_init_acls(dir, &mode, &acls); |
736 | if (err < 0) | |
737 | return err; | |
738 | ||
1a67aafb | 739 | dout("mknod in dir %p dentry %p mode 0%ho rdev %d\n", |
2817b000 SW |
740 | dir, dentry, mode, rdev); |
741 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS); | |
742 | if (IS_ERR(req)) { | |
b1ee94aa YZ |
743 | err = PTR_ERR(req); |
744 | goto out; | |
2817b000 SW |
745 | } |
746 | req->r_dentry = dget(dentry); | |
747 | req->r_num_caps = 2; | |
748 | req->r_locked_dir = dir; | |
749 | req->r_args.mknod.mode = cpu_to_le32(mode); | |
750 | req->r_args.mknod.rdev = cpu_to_le32(rdev); | |
751 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
752 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
b1ee94aa YZ |
753 | if (acls.pagelist) { |
754 | req->r_pagelist = acls.pagelist; | |
755 | acls.pagelist = NULL; | |
756 | } | |
2817b000 SW |
757 | err = ceph_mdsc_do_request(mdsc, dir, req); |
758 | if (!err && !req->r_reply_info.head->is_dentry) | |
759 | err = ceph_handle_notrace_create(dir, dentry); | |
760 | ceph_mdsc_put_request(req); | |
b1ee94aa | 761 | out: |
7221fe4c | 762 | if (!err) |
2b0143b5 | 763 | ceph_init_inode_acls(d_inode(dentry), &acls); |
b20a95a0 | 764 | else |
2817b000 | 765 | d_drop(dentry); |
b1ee94aa | 766 | ceph_release_acls_info(&acls); |
2817b000 SW |
767 | return err; |
768 | } | |
769 | ||
4acdaf27 | 770 | static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 771 | bool excl) |
2817b000 | 772 | { |
2d83bde9 | 773 | return ceph_mknod(dir, dentry, mode, 0); |
2817b000 SW |
774 | } |
775 | ||
776 | static int ceph_symlink(struct inode *dir, struct dentry *dentry, | |
777 | const char *dest) | |
778 | { | |
3d14c5d2 YS |
779 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
780 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
781 | struct ceph_mds_request *req; |
782 | int err; | |
783 | ||
784 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
785 | return -EROFS; | |
786 | ||
787 | dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest); | |
788 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS); | |
789 | if (IS_ERR(req)) { | |
b1ee94aa YZ |
790 | err = PTR_ERR(req); |
791 | goto out; | |
2817b000 | 792 | } |
687265e5 | 793 | req->r_path2 = kstrdup(dest, GFP_KERNEL); |
a149bb9a SK |
794 | if (!req->r_path2) { |
795 | err = -ENOMEM; | |
796 | ceph_mdsc_put_request(req); | |
797 | goto out; | |
798 | } | |
2817b000 | 799 | req->r_locked_dir = dir; |
a149bb9a SK |
800 | req->r_dentry = dget(dentry); |
801 | req->r_num_caps = 2; | |
2817b000 SW |
802 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
803 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
804 | err = ceph_mdsc_do_request(mdsc, dir, req); | |
805 | if (!err && !req->r_reply_info.head->is_dentry) | |
806 | err = ceph_handle_notrace_create(dir, dentry); | |
807 | ceph_mdsc_put_request(req); | |
b1ee94aa YZ |
808 | out: |
809 | if (err) | |
2817b000 SW |
810 | d_drop(dentry); |
811 | return err; | |
812 | } | |
813 | ||
18bb1db3 | 814 | static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
2817b000 | 815 | { |
3d14c5d2 YS |
816 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
817 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 818 | struct ceph_mds_request *req; |
b1ee94aa | 819 | struct ceph_acls_info acls = {}; |
2817b000 SW |
820 | int err = -EROFS; |
821 | int op; | |
822 | ||
823 | if (ceph_snap(dir) == CEPH_SNAPDIR) { | |
824 | /* mkdir .snap/foo is a MKSNAP */ | |
825 | op = CEPH_MDS_OP_MKSNAP; | |
a455589f AV |
826 | dout("mksnap dir %p snap '%pd' dn %p\n", dir, |
827 | dentry, dentry); | |
2817b000 | 828 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { |
18bb1db3 | 829 | dout("mkdir dir %p dn %p mode 0%ho\n", dir, dentry, mode); |
2817b000 SW |
830 | op = CEPH_MDS_OP_MKDIR; |
831 | } else { | |
832 | goto out; | |
833 | } | |
b1ee94aa YZ |
834 | |
835 | mode |= S_IFDIR; | |
836 | err = ceph_pre_init_acls(dir, &mode, &acls); | |
837 | if (err < 0) | |
838 | goto out; | |
839 | ||
2817b000 SW |
840 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
841 | if (IS_ERR(req)) { | |
842 | err = PTR_ERR(req); | |
843 | goto out; | |
844 | } | |
845 | ||
846 | req->r_dentry = dget(dentry); | |
847 | req->r_num_caps = 2; | |
848 | req->r_locked_dir = dir; | |
849 | req->r_args.mkdir.mode = cpu_to_le32(mode); | |
850 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
851 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
b1ee94aa YZ |
852 | if (acls.pagelist) { |
853 | req->r_pagelist = acls.pagelist; | |
854 | acls.pagelist = NULL; | |
855 | } | |
2817b000 | 856 | err = ceph_mdsc_do_request(mdsc, dir, req); |
275dd19e YZ |
857 | if (!err && |
858 | !req->r_reply_info.head->is_target && | |
859 | !req->r_reply_info.head->is_dentry) | |
2817b000 SW |
860 | err = ceph_handle_notrace_create(dir, dentry); |
861 | ceph_mdsc_put_request(req); | |
862 | out: | |
b20a95a0 | 863 | if (!err) |
2b0143b5 | 864 | ceph_init_inode_acls(d_inode(dentry), &acls); |
b20a95a0 | 865 | else |
2817b000 | 866 | d_drop(dentry); |
b1ee94aa | 867 | ceph_release_acls_info(&acls); |
2817b000 SW |
868 | return err; |
869 | } | |
870 | ||
871 | static int ceph_link(struct dentry *old_dentry, struct inode *dir, | |
872 | struct dentry *dentry) | |
873 | { | |
3d14c5d2 YS |
874 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
875 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
876 | struct ceph_mds_request *req; |
877 | int err; | |
878 | ||
879 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
880 | return -EROFS; | |
881 | ||
882 | dout("link in dir %p old_dentry %p dentry %p\n", dir, | |
883 | old_dentry, dentry); | |
884 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS); | |
885 | if (IS_ERR(req)) { | |
886 | d_drop(dentry); | |
887 | return PTR_ERR(req); | |
888 | } | |
889 | req->r_dentry = dget(dentry); | |
890 | req->r_num_caps = 2; | |
4b58c9b1 | 891 | req->r_old_dentry = dget(old_dentry); |
2817b000 SW |
892 | req->r_locked_dir = dir; |
893 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
894 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
ad88f23f YZ |
895 | /* release LINK_SHARED on source inode (mds will lock it) */ |
896 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; | |
2817b000 | 897 | err = ceph_mdsc_do_request(mdsc, dir, req); |
70b666c3 | 898 | if (err) { |
2817b000 | 899 | d_drop(dentry); |
70b666c3 | 900 | } else if (!req->r_reply_info.head->is_dentry) { |
2b0143b5 DH |
901 | ihold(d_inode(old_dentry)); |
902 | d_instantiate(dentry, d_inode(old_dentry)); | |
70b666c3 | 903 | } |
2817b000 SW |
904 | ceph_mdsc_put_request(req); |
905 | return err; | |
906 | } | |
907 | ||
908 | /* | |
909 | * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it | |
910 | * looks like the link count will hit 0, drop any other caps (other | |
911 | * than PIN) we don't specifically want (due to the file still being | |
912 | * open). | |
913 | */ | |
914 | static int drop_caps_for_unlink(struct inode *inode) | |
915 | { | |
916 | struct ceph_inode_info *ci = ceph_inode(inode); | |
917 | int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL; | |
918 | ||
be655596 | 919 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
920 | if (inode->i_nlink == 1) { |
921 | drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN); | |
922 | ci->i_ceph_flags |= CEPH_I_NODELAY; | |
923 | } | |
be655596 | 924 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
925 | return drop; |
926 | } | |
927 | ||
928 | /* | |
929 | * rmdir and unlink are differ only by the metadata op code | |
930 | */ | |
931 | static int ceph_unlink(struct inode *dir, struct dentry *dentry) | |
932 | { | |
3d14c5d2 YS |
933 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
934 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2b0143b5 | 935 | struct inode *inode = d_inode(dentry); |
2817b000 SW |
936 | struct ceph_mds_request *req; |
937 | int err = -EROFS; | |
938 | int op; | |
939 | ||
940 | if (ceph_snap(dir) == CEPH_SNAPDIR) { | |
941 | /* rmdir .snap/foo is RMSNAP */ | |
a455589f | 942 | dout("rmsnap dir %p '%pd' dn %p\n", dir, dentry, dentry); |
2817b000 SW |
943 | op = CEPH_MDS_OP_RMSNAP; |
944 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { | |
945 | dout("unlink/rmdir dir %p dn %p inode %p\n", | |
946 | dir, dentry, inode); | |
e36cb0b8 | 947 | op = d_is_dir(dentry) ? |
2817b000 SW |
948 | CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK; |
949 | } else | |
950 | goto out; | |
951 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); | |
952 | if (IS_ERR(req)) { | |
953 | err = PTR_ERR(req); | |
954 | goto out; | |
955 | } | |
956 | req->r_dentry = dget(dentry); | |
957 | req->r_num_caps = 2; | |
958 | req->r_locked_dir = dir; | |
959 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
960 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
961 | req->r_inode_drop = drop_caps_for_unlink(inode); | |
962 | err = ceph_mdsc_do_request(mdsc, dir, req); | |
963 | if (!err && !req->r_reply_info.head->is_dentry) | |
964 | d_delete(dentry); | |
965 | ceph_mdsc_put_request(req); | |
966 | out: | |
967 | return err; | |
968 | } | |
969 | ||
970 | static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry, | |
971 | struct inode *new_dir, struct dentry *new_dentry) | |
972 | { | |
3d14c5d2 YS |
973 | struct ceph_fs_client *fsc = ceph_sb_to_client(old_dir->i_sb); |
974 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 975 | struct ceph_mds_request *req; |
0ea611a3 | 976 | int op = CEPH_MDS_OP_RENAME; |
2817b000 SW |
977 | int err; |
978 | ||
979 | if (ceph_snap(old_dir) != ceph_snap(new_dir)) | |
980 | return -EXDEV; | |
0ea611a3 YZ |
981 | if (ceph_snap(old_dir) != CEPH_NOSNAP) { |
982 | if (old_dir == new_dir && ceph_snap(old_dir) == CEPH_SNAPDIR) | |
983 | op = CEPH_MDS_OP_RENAMESNAP; | |
984 | else | |
985 | return -EROFS; | |
986 | } | |
2817b000 SW |
987 | dout("rename dir %p dentry %p to dir %p dentry %p\n", |
988 | old_dir, old_dentry, new_dir, new_dentry); | |
0ea611a3 | 989 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
2817b000 SW |
990 | if (IS_ERR(req)) |
991 | return PTR_ERR(req); | |
180061a5 | 992 | ihold(old_dir); |
2817b000 SW |
993 | req->r_dentry = dget(new_dentry); |
994 | req->r_num_caps = 2; | |
995 | req->r_old_dentry = dget(old_dentry); | |
180061a5 | 996 | req->r_old_dentry_dir = old_dir; |
2817b000 SW |
997 | req->r_locked_dir = new_dir; |
998 | req->r_old_dentry_drop = CEPH_CAP_FILE_SHARED; | |
999 | req->r_old_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1000 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
1001 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1002 | /* release LINK_RDCACHE on source inode (mds will lock it) */ | |
1003 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; | |
2b0143b5 DH |
1004 | if (d_really_is_positive(new_dentry)) |
1005 | req->r_inode_drop = drop_caps_for_unlink(d_inode(new_dentry)); | |
2817b000 SW |
1006 | err = ceph_mdsc_do_request(mdsc, old_dir, req); |
1007 | if (!err && !req->r_reply_info.head->is_dentry) { | |
1008 | /* | |
1009 | * Normally d_move() is done by fill_trace (called by | |
1010 | * do_request, above). If there is no trace, we need | |
1011 | * to do it here. | |
1012 | */ | |
ea1409f9 | 1013 | |
fdd4e158 YZ |
1014 | /* d_move screws up sibling dentries' offsets */ |
1015 | ceph_dir_clear_complete(old_dir); | |
1016 | ceph_dir_clear_complete(new_dir); | |
1017 | ||
2817b000 | 1018 | d_move(old_dentry, new_dentry); |
ea1409f9 SW |
1019 | |
1020 | /* ensure target dentry is invalidated, despite | |
1021 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d | 1022 | ceph_invalidate_dentry_lease(new_dentry); |
2817b000 SW |
1023 | } |
1024 | ceph_mdsc_put_request(req); | |
1025 | return err; | |
1026 | } | |
1027 | ||
81a6cf2d SW |
1028 | /* |
1029 | * Ensure a dentry lease will no longer revalidate. | |
1030 | */ | |
1031 | void ceph_invalidate_dentry_lease(struct dentry *dentry) | |
1032 | { | |
1033 | spin_lock(&dentry->d_lock); | |
1034 | dentry->d_time = jiffies; | |
1035 | ceph_dentry(dentry)->lease_shared_gen = 0; | |
1036 | spin_unlock(&dentry->d_lock); | |
1037 | } | |
2817b000 SW |
1038 | |
1039 | /* | |
1040 | * Check if dentry lease is valid. If not, delete the lease. Try to | |
1041 | * renew if the least is more than half up. | |
1042 | */ | |
1043 | static int dentry_lease_is_valid(struct dentry *dentry) | |
1044 | { | |
1045 | struct ceph_dentry_info *di; | |
1046 | struct ceph_mds_session *s; | |
1047 | int valid = 0; | |
1048 | u32 gen; | |
1049 | unsigned long ttl; | |
1050 | struct ceph_mds_session *session = NULL; | |
1051 | struct inode *dir = NULL; | |
1052 | u32 seq = 0; | |
1053 | ||
1054 | spin_lock(&dentry->d_lock); | |
1055 | di = ceph_dentry(dentry); | |
3d8eb7a9 | 1056 | if (di->lease_session) { |
2817b000 | 1057 | s = di->lease_session; |
d8fb02ab | 1058 | spin_lock(&s->s_gen_ttl_lock); |
2817b000 SW |
1059 | gen = s->s_cap_gen; |
1060 | ttl = s->s_cap_ttl; | |
d8fb02ab | 1061 | spin_unlock(&s->s_gen_ttl_lock); |
2817b000 SW |
1062 | |
1063 | if (di->lease_gen == gen && | |
1064 | time_before(jiffies, dentry->d_time) && | |
1065 | time_before(jiffies, ttl)) { | |
1066 | valid = 1; | |
1067 | if (di->lease_renew_after && | |
1068 | time_after(jiffies, di->lease_renew_after)) { | |
1069 | /* we should renew */ | |
2b0143b5 | 1070 | dir = d_inode(dentry->d_parent); |
2817b000 SW |
1071 | session = ceph_get_mds_session(s); |
1072 | seq = di->lease_seq; | |
1073 | di->lease_renew_after = 0; | |
1074 | di->lease_renew_from = jiffies; | |
1075 | } | |
2817b000 SW |
1076 | } |
1077 | } | |
1078 | spin_unlock(&dentry->d_lock); | |
1079 | ||
1080 | if (session) { | |
1081 | ceph_mdsc_lease_send_msg(session, dir, dentry, | |
1082 | CEPH_MDS_LEASE_RENEW, seq); | |
1083 | ceph_put_mds_session(session); | |
1084 | } | |
1085 | dout("dentry_lease_is_valid - dentry %p = %d\n", dentry, valid); | |
1086 | return valid; | |
1087 | } | |
1088 | ||
1089 | /* | |
1090 | * Check if directory-wide content lease/cap is valid. | |
1091 | */ | |
1092 | static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry) | |
1093 | { | |
1094 | struct ceph_inode_info *ci = ceph_inode(dir); | |
1095 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
1096 | int valid = 0; | |
1097 | ||
be655596 | 1098 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
1099 | if (ci->i_shared_gen == di->lease_shared_gen) |
1100 | valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1); | |
be655596 | 1101 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
1102 | dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n", |
1103 | dir, (unsigned)ci->i_shared_gen, dentry, | |
1104 | (unsigned)di->lease_shared_gen, valid); | |
1105 | return valid; | |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Check if cached dentry can be trusted. | |
1110 | */ | |
0b728e19 | 1111 | static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags) |
2817b000 | 1112 | { |
bf1c6aca | 1113 | int valid = 0; |
641235d8 | 1114 | struct dentry *parent; |
34286d66 NP |
1115 | struct inode *dir; |
1116 | ||
0b728e19 | 1117 | if (flags & LOOKUP_RCU) |
34286d66 NP |
1118 | return -ECHILD; |
1119 | ||
a455589f | 1120 | dout("d_revalidate %p '%pd' inode %p offset %lld\n", dentry, |
2b0143b5 | 1121 | dentry, d_inode(dentry), ceph_dentry(dentry)->offset); |
2817b000 | 1122 | |
641235d8 YZ |
1123 | parent = dget_parent(dentry); |
1124 | dir = d_inode(parent); | |
bf1c6aca | 1125 | |
2817b000 SW |
1126 | /* always trust cached snapped dentries, snapdir dentry */ |
1127 | if (ceph_snap(dir) != CEPH_NOSNAP) { | |
a455589f | 1128 | dout("d_revalidate %p '%pd' inode %p is SNAPPED\n", dentry, |
2b0143b5 | 1129 | dentry, d_inode(dentry)); |
bf1c6aca | 1130 | valid = 1; |
2b0143b5 DH |
1131 | } else if (d_really_is_positive(dentry) && |
1132 | ceph_snap(d_inode(dentry)) == CEPH_SNAPDIR) { | |
bf1c6aca SW |
1133 | valid = 1; |
1134 | } else if (dentry_lease_is_valid(dentry) || | |
1135 | dir_lease_is_valid(dir, dentry)) { | |
2b0143b5 DH |
1136 | if (d_really_is_positive(dentry)) |
1137 | valid = ceph_is_any_caps(d_inode(dentry)); | |
9215aeea YZ |
1138 | else |
1139 | valid = 1; | |
2817b000 | 1140 | } |
2817b000 | 1141 | |
200fd27c YZ |
1142 | if (!valid) { |
1143 | struct ceph_mds_client *mdsc = | |
1144 | ceph_sb_to_client(dir->i_sb)->mdsc; | |
1145 | struct ceph_mds_request *req; | |
1146 | int op, mask, err; | |
1147 | ||
1148 | op = ceph_snap(dir) == CEPH_SNAPDIR ? | |
1149 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; | |
1150 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); | |
1151 | if (!IS_ERR(req)) { | |
1152 | req->r_dentry = dget(dentry); | |
1153 | req->r_num_caps = 2; | |
1154 | ||
1155 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
1156 | if (ceph_security_xattr_wanted(dir)) | |
1157 | mask |= CEPH_CAP_XATTR_SHARED; | |
1158 | req->r_args.getattr.mask = mask; | |
1159 | ||
1160 | req->r_locked_dir = dir; | |
1161 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
1162 | if (err == 0 || err == -ENOENT) { | |
1163 | if (dentry == req->r_dentry) { | |
1164 | valid = !d_unhashed(dentry); | |
1165 | } else { | |
1166 | d_invalidate(req->r_dentry); | |
1167 | err = -EAGAIN; | |
1168 | } | |
1169 | } | |
1170 | ceph_mdsc_put_request(req); | |
1171 | dout("d_revalidate %p lookup result=%d\n", | |
1172 | dentry, err); | |
1173 | } | |
1174 | } | |
1175 | ||
bf1c6aca | 1176 | dout("d_revalidate %p %s\n", dentry, valid ? "valid" : "invalid"); |
9215aeea | 1177 | if (valid) { |
bf1c6aca | 1178 | ceph_dentry_lru_touch(dentry); |
9215aeea YZ |
1179 | } else { |
1180 | ceph_dir_clear_complete(dir); | |
9215aeea | 1181 | } |
641235d8 YZ |
1182 | |
1183 | dput(parent); | |
bf1c6aca | 1184 | return valid; |
2817b000 SW |
1185 | } |
1186 | ||
1187 | /* | |
147851d2 | 1188 | * Release our ceph_dentry_info. |
2817b000 | 1189 | */ |
147851d2 | 1190 | static void ceph_d_release(struct dentry *dentry) |
2817b000 SW |
1191 | { |
1192 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
2817b000 | 1193 | |
147851d2 | 1194 | dout("d_release %p\n", dentry); |
3d8eb7a9 SW |
1195 | ceph_dentry_lru_del(dentry); |
1196 | if (di->lease_session) | |
1197 | ceph_put_mds_session(di->lease_session); | |
1198 | kmem_cache_free(ceph_dentry_cachep, di); | |
1199 | dentry->d_fsdata = NULL; | |
2817b000 SW |
1200 | } |
1201 | ||
1202 | static int ceph_snapdir_d_revalidate(struct dentry *dentry, | |
0b728e19 | 1203 | unsigned int flags) |
2817b000 SW |
1204 | { |
1205 | /* | |
1206 | * Eventually, we'll want to revalidate snapped metadata | |
1207 | * too... probably... | |
1208 | */ | |
1209 | return 1; | |
1210 | } | |
1211 | ||
b58dc410 SW |
1212 | /* |
1213 | * When the VFS prunes a dentry from the cache, we need to clear the | |
1214 | * complete flag on the parent directory. | |
1215 | * | |
1216 | * Called under dentry->d_lock. | |
1217 | */ | |
1218 | static void ceph_d_prune(struct dentry *dentry) | |
1219 | { | |
774ac21d | 1220 | dout("ceph_d_prune %p\n", dentry); |
b58dc410 SW |
1221 | |
1222 | /* do we have a valid parent? */ | |
8842b3be | 1223 | if (IS_ROOT(dentry)) |
b58dc410 SW |
1224 | return; |
1225 | ||
2f276c51 | 1226 | /* if we are not hashed, we don't affect dir's completeness */ |
b58dc410 SW |
1227 | if (d_unhashed(dentry)) |
1228 | return; | |
2817b000 | 1229 | |
b58dc410 SW |
1230 | /* |
1231 | * we hold d_lock, so d_parent is stable, and d_fsdata is never | |
1232 | * cleared until d_release | |
1233 | */ | |
2b0143b5 | 1234 | ceph_dir_clear_complete(d_inode(dentry->d_parent)); |
b58dc410 | 1235 | } |
2817b000 SW |
1236 | |
1237 | /* | |
1238 | * read() on a dir. This weird interface hack only works if mounted | |
1239 | * with '-o dirstat'. | |
1240 | */ | |
1241 | static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, | |
1242 | loff_t *ppos) | |
1243 | { | |
1244 | struct ceph_file_info *cf = file->private_data; | |
496ad9aa | 1245 | struct inode *inode = file_inode(file); |
2817b000 SW |
1246 | struct ceph_inode_info *ci = ceph_inode(inode); |
1247 | int left; | |
ae598083 | 1248 | const int bufsize = 1024; |
2817b000 | 1249 | |
3d14c5d2 | 1250 | if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT)) |
2817b000 SW |
1251 | return -EISDIR; |
1252 | ||
1253 | if (!cf->dir_info) { | |
687265e5 | 1254 | cf->dir_info = kmalloc(bufsize, GFP_KERNEL); |
2817b000 SW |
1255 | if (!cf->dir_info) |
1256 | return -ENOMEM; | |
1257 | cf->dir_info_len = | |
ae598083 | 1258 | snprintf(cf->dir_info, bufsize, |
2817b000 SW |
1259 | "entries: %20lld\n" |
1260 | " files: %20lld\n" | |
1261 | " subdirs: %20lld\n" | |
1262 | "rentries: %20lld\n" | |
1263 | " rfiles: %20lld\n" | |
1264 | " rsubdirs: %20lld\n" | |
1265 | "rbytes: %20lld\n" | |
1266 | "rctime: %10ld.%09ld\n", | |
1267 | ci->i_files + ci->i_subdirs, | |
1268 | ci->i_files, | |
1269 | ci->i_subdirs, | |
1270 | ci->i_rfiles + ci->i_rsubdirs, | |
1271 | ci->i_rfiles, | |
1272 | ci->i_rsubdirs, | |
1273 | ci->i_rbytes, | |
1274 | (long)ci->i_rctime.tv_sec, | |
1275 | (long)ci->i_rctime.tv_nsec); | |
1276 | } | |
1277 | ||
1278 | if (*ppos >= cf->dir_info_len) | |
1279 | return 0; | |
1280 | size = min_t(unsigned, size, cf->dir_info_len-*ppos); | |
1281 | left = copy_to_user(buf, cf->dir_info + *ppos, size); | |
1282 | if (left == size) | |
1283 | return -EFAULT; | |
1284 | *ppos += (size - left); | |
1285 | return size - left; | |
1286 | } | |
1287 | ||
2817b000 SW |
1288 | /* |
1289 | * We maintain a private dentry LRU. | |
1290 | * | |
1291 | * FIXME: this needs to be changed to a per-mds lru to be useful. | |
1292 | */ | |
1293 | void ceph_dentry_lru_add(struct dentry *dn) | |
1294 | { | |
1295 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1296 | struct ceph_mds_client *mdsc; | |
2817b000 | 1297 | |
a455589f | 1298 | dout("dentry_lru_add %p %p '%pd'\n", di, dn, dn); |
3d8eb7a9 SW |
1299 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1300 | spin_lock(&mdsc->dentry_lru_lock); | |
1301 | list_add_tail(&di->lru, &mdsc->dentry_lru); | |
1302 | mdsc->num_dentry++; | |
1303 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1304 | } |
1305 | ||
1306 | void ceph_dentry_lru_touch(struct dentry *dn) | |
1307 | { | |
1308 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1309 | struct ceph_mds_client *mdsc; | |
2817b000 | 1310 | |
a455589f AV |
1311 | dout("dentry_lru_touch %p %p '%pd' (offset %lld)\n", di, dn, dn, |
1312 | di->offset); | |
3d8eb7a9 SW |
1313 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1314 | spin_lock(&mdsc->dentry_lru_lock); | |
1315 | list_move_tail(&di->lru, &mdsc->dentry_lru); | |
1316 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1317 | } |
1318 | ||
1319 | void ceph_dentry_lru_del(struct dentry *dn) | |
1320 | { | |
1321 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1322 | struct ceph_mds_client *mdsc; | |
1323 | ||
a455589f | 1324 | dout("dentry_lru_del %p %p '%pd'\n", di, dn, dn); |
3d8eb7a9 SW |
1325 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1326 | spin_lock(&mdsc->dentry_lru_lock); | |
1327 | list_del_init(&di->lru); | |
1328 | mdsc->num_dentry--; | |
1329 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1330 | } |
1331 | ||
6c0f3af7 SW |
1332 | /* |
1333 | * Return name hash for a given dentry. This is dependent on | |
1334 | * the parent directory's hash function. | |
1335 | */ | |
e5f86dc3 | 1336 | unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn) |
6c0f3af7 | 1337 | { |
6c0f3af7 SW |
1338 | struct ceph_inode_info *dci = ceph_inode(dir); |
1339 | ||
1340 | switch (dci->i_dir_layout.dl_dir_hash) { | |
1341 | case 0: /* for backward compat */ | |
1342 | case CEPH_STR_HASH_LINUX: | |
1343 | return dn->d_name.hash; | |
1344 | ||
1345 | default: | |
1346 | return ceph_str_hash(dci->i_dir_layout.dl_dir_hash, | |
1347 | dn->d_name.name, dn->d_name.len); | |
1348 | } | |
1349 | } | |
1350 | ||
2817b000 SW |
1351 | const struct file_operations ceph_dir_fops = { |
1352 | .read = ceph_read_dir, | |
77acfa29 | 1353 | .iterate = ceph_readdir, |
2817b000 SW |
1354 | .llseek = ceph_dir_llseek, |
1355 | .open = ceph_open, | |
1356 | .release = ceph_release, | |
1357 | .unlocked_ioctl = ceph_ioctl, | |
da819c81 | 1358 | .fsync = ceph_fsync, |
2817b000 SW |
1359 | }; |
1360 | ||
38c48b5f YZ |
1361 | const struct file_operations ceph_snapdir_fops = { |
1362 | .iterate = ceph_readdir, | |
1363 | .llseek = ceph_dir_llseek, | |
1364 | .open = ceph_open, | |
1365 | .release = ceph_release, | |
1366 | }; | |
1367 | ||
2817b000 SW |
1368 | const struct inode_operations ceph_dir_iops = { |
1369 | .lookup = ceph_lookup, | |
1370 | .permission = ceph_permission, | |
1371 | .getattr = ceph_getattr, | |
1372 | .setattr = ceph_setattr, | |
1373 | .setxattr = ceph_setxattr, | |
1374 | .getxattr = ceph_getxattr, | |
1375 | .listxattr = ceph_listxattr, | |
1376 | .removexattr = ceph_removexattr, | |
7221fe4c | 1377 | .get_acl = ceph_get_acl, |
72466d0b | 1378 | .set_acl = ceph_set_acl, |
2817b000 SW |
1379 | .mknod = ceph_mknod, |
1380 | .symlink = ceph_symlink, | |
1381 | .mkdir = ceph_mkdir, | |
1382 | .link = ceph_link, | |
1383 | .unlink = ceph_unlink, | |
1384 | .rmdir = ceph_unlink, | |
1385 | .rename = ceph_rename, | |
1386 | .create = ceph_create, | |
2d83bde9 | 1387 | .atomic_open = ceph_atomic_open, |
2817b000 SW |
1388 | }; |
1389 | ||
38c48b5f YZ |
1390 | const struct inode_operations ceph_snapdir_iops = { |
1391 | .lookup = ceph_lookup, | |
1392 | .permission = ceph_permission, | |
1393 | .getattr = ceph_getattr, | |
1394 | .mkdir = ceph_mkdir, | |
1395 | .rmdir = ceph_unlink, | |
0ea611a3 | 1396 | .rename = ceph_rename, |
38c48b5f YZ |
1397 | }; |
1398 | ||
52dfb8ac | 1399 | const struct dentry_operations ceph_dentry_ops = { |
2817b000 | 1400 | .d_revalidate = ceph_d_revalidate, |
147851d2 | 1401 | .d_release = ceph_d_release, |
b58dc410 | 1402 | .d_prune = ceph_d_prune, |
2817b000 SW |
1403 | }; |
1404 | ||
52dfb8ac | 1405 | const struct dentry_operations ceph_snapdir_dentry_ops = { |
2817b000 | 1406 | .d_revalidate = ceph_snapdir_d_revalidate, |
147851d2 | 1407 | .d_release = ceph_d_release, |
2817b000 SW |
1408 | }; |
1409 | ||
52dfb8ac | 1410 | const struct dentry_operations ceph_snap_dentry_ops = { |
147851d2 | 1411 | .d_release = ceph_d_release, |
b58dc410 | 1412 | .d_prune = ceph_d_prune, |
2817b000 | 1413 | }; |