Commit | Line | Data |
---|---|---|
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); | |
a149bb9a SK |
368 | |
369 | req->r_inode = inode; | |
370 | ihold(inode); | |
371 | req->r_dentry = dget(file->f_path.dentry); | |
2817b000 SW |
372 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
373 | if (err < 0) { | |
374 | ceph_mdsc_put_request(req); | |
375 | return err; | |
376 | } | |
377 | dout("readdir got and parsed readdir result=%d" | |
378 | " on frag %x, end=%d, complete=%d\n", err, frag, | |
379 | (int)req->r_reply_info.dir_end, | |
380 | (int)req->r_reply_info.dir_complete); | |
381 | ||
2817b000 SW |
382 | |
383 | /* note next offset and last dentry name */ | |
81c6aea5 YZ |
384 | rinfo = &req->r_reply_info; |
385 | if (le32_to_cpu(rinfo->dir_dir->frag) != frag) { | |
386 | frag = le32_to_cpu(rinfo->dir_dir->frag); | |
fdd4e158 YZ |
387 | off = req->r_readdir_offset; |
388 | fi->next_offset = off; | |
81c6aea5 | 389 | } |
fdd4e158 | 390 | |
f0494206 | 391 | fi->frag = frag; |
2817b000 SW |
392 | fi->offset = fi->next_offset; |
393 | fi->last_readdir = req; | |
394 | ||
fdd4e158 YZ |
395 | if (req->r_did_prepopulate) { |
396 | fi->readdir_cache_idx = req->r_readdir_cache_idx; | |
397 | if (fi->readdir_cache_idx < 0) { | |
398 | /* preclude from marking dir ordered */ | |
399 | fi->dir_ordered_count = 0; | |
400 | } else if (ceph_frag_is_leftmost(frag) && off == 2) { | |
401 | /* note dir version at start of readdir so | |
402 | * we can tell if any dentries get dropped */ | |
403 | fi->dir_release_count = req->r_dir_release_cnt; | |
404 | fi->dir_ordered_count = req->r_dir_ordered_cnt; | |
405 | } | |
406 | } else { | |
407 | dout("readdir !did_prepopulate"); | |
408 | /* disable readdir cache */ | |
409 | fi->readdir_cache_idx = -1; | |
410 | /* preclude from marking dir complete */ | |
411 | fi->dir_release_count = 0; | |
412 | } | |
413 | ||
2817b000 SW |
414 | if (req->r_reply_info.dir_end) { |
415 | kfree(fi->last_name); | |
416 | fi->last_name = NULL; | |
a78600e7 | 417 | fi->next_offset = 2; |
2817b000 | 418 | } else { |
2a5beea3 YZ |
419 | struct ceph_mds_reply_dir_entry *rde = |
420 | rinfo->dir_entries + (rinfo->dir_nr-1); | |
421 | err = note_last_dentry(fi, rde->name, rde->name_len, | |
fdd4e158 | 422 | fi->next_offset + rinfo->dir_nr); |
2817b000 SW |
423 | if (err) |
424 | return err; | |
2817b000 SW |
425 | } |
426 | } | |
427 | ||
428 | rinfo = &fi->last_readdir->r_reply_info; | |
429 | dout("readdir frag %x num %d off %d chunkoff %d\n", frag, | |
430 | rinfo->dir_nr, off, fi->offset); | |
77acfa29 AV |
431 | |
432 | ctx->pos = ceph_make_fpos(frag, off); | |
da39822c | 433 | while (off >= fi->offset && off - fi->offset < rinfo->dir_nr) { |
2a5beea3 YZ |
434 | struct ceph_mds_reply_dir_entry *rde = |
435 | rinfo->dir_entries + (off - fi->offset); | |
3105c19c SW |
436 | struct ceph_vino vino; |
437 | ino_t ino; | |
438 | ||
2817b000 | 439 | dout("readdir off %d (%d/%d) -> %lld '%.*s' %p\n", |
77acfa29 | 440 | off, off - fi->offset, rinfo->dir_nr, ctx->pos, |
2a5beea3 YZ |
441 | rde->name_len, rde->name, &rde->inode.in); |
442 | BUG_ON(!rde->inode.in); | |
443 | ftype = le32_to_cpu(rde->inode.in->mode) >> 12; | |
444 | vino.ino = le64_to_cpu(rde->inode.in->ino); | |
445 | vino.snap = le64_to_cpu(rde->inode.in->snapid); | |
3105c19c | 446 | ino = ceph_vino_to_ino(vino); |
2a5beea3 YZ |
447 | if (!dir_emit(ctx, rde->name, rde->name_len, |
448 | ceph_translate_ino(inode->i_sb, ino), ftype)) { | |
2817b000 SW |
449 | dout("filldir stopping us...\n"); |
450 | return 0; | |
451 | } | |
452 | off++; | |
77acfa29 | 453 | ctx->pos++; |
2817b000 SW |
454 | } |
455 | ||
456 | if (fi->last_name) { | |
457 | ceph_mdsc_put_request(fi->last_readdir); | |
458 | fi->last_readdir = NULL; | |
459 | goto more; | |
460 | } | |
461 | ||
462 | /* more frags? */ | |
463 | if (!ceph_frag_is_rightmost(frag)) { | |
464 | frag = ceph_frag_next(frag); | |
a78600e7 | 465 | off = 2; |
77acfa29 | 466 | ctx->pos = ceph_make_fpos(frag, off); |
2817b000 SW |
467 | dout("readdir next frag is %x\n", frag); |
468 | goto more; | |
469 | } | |
9cfa1098 | 470 | fi->flags |= CEPH_F_ATEND; |
2817b000 SW |
471 | |
472 | /* | |
473 | * if dir_release_count still matches the dir, no dentries | |
474 | * were released during the whole readdir, and we should have | |
475 | * the complete dir contents in our cache. | |
476 | */ | |
fdd4e158 YZ |
477 | if (atomic64_read(&ci->i_release_count) == fi->dir_release_count) { |
478 | spin_lock(&ci->i_ceph_lock); | |
479 | if (fi->dir_ordered_count == atomic64_read(&ci->i_ordered_count)) { | |
70db4f36 | 480 | dout(" marking %p complete and ordered\n", inode); |
fdd4e158 YZ |
481 | /* use i_size to track number of entries in |
482 | * readdir cache */ | |
483 | BUG_ON(fi->readdir_cache_idx < 0); | |
484 | i_size_write(inode, fi->readdir_cache_idx * | |
485 | sizeof(struct dentry*)); | |
486 | } else { | |
70db4f36 | 487 | dout(" marking %p complete\n", inode); |
fdd4e158 | 488 | } |
70db4f36 YZ |
489 | __ceph_dir_set_complete(ci, fi->dir_release_count, |
490 | fi->dir_ordered_count); | |
fdd4e158 | 491 | spin_unlock(&ci->i_ceph_lock); |
2817b000 | 492 | } |
2817b000 | 493 | |
77acfa29 | 494 | dout("readdir %p file %p done.\n", inode, file); |
2817b000 SW |
495 | return 0; |
496 | } | |
497 | ||
dcd3cc05 | 498 | static void reset_readdir(struct ceph_file_info *fi, unsigned frag) |
2817b000 SW |
499 | { |
500 | if (fi->last_readdir) { | |
501 | ceph_mdsc_put_request(fi->last_readdir); | |
502 | fi->last_readdir = NULL; | |
503 | } | |
504 | kfree(fi->last_name); | |
a1629c3b | 505 | fi->last_name = NULL; |
fdd4e158 YZ |
506 | fi->dir_release_count = 0; |
507 | fi->readdir_cache_idx = -1; | |
a78600e7 | 508 | fi->next_offset = 2; /* compensate for . and .. */ |
9cfa1098 | 509 | fi->flags &= ~CEPH_F_ATEND; |
2817b000 SW |
510 | } |
511 | ||
965c8e59 | 512 | static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence) |
2817b000 SW |
513 | { |
514 | struct ceph_file_info *fi = file->private_data; | |
515 | struct inode *inode = file->f_mapping->host; | |
f0494206 | 516 | loff_t old_offset = ceph_make_fpos(fi->frag, fi->next_offset); |
2817b000 SW |
517 | loff_t retval; |
518 | ||
5955102c | 519 | inode_lock(inode); |
06222e49 | 520 | retval = -EINVAL; |
965c8e59 | 521 | switch (whence) { |
2817b000 SW |
522 | case SEEK_CUR: |
523 | offset += file->f_pos; | |
06222e49 JB |
524 | case SEEK_SET: |
525 | break; | |
fdd4e158 YZ |
526 | case SEEK_END: |
527 | retval = -EOPNOTSUPP; | |
06222e49 JB |
528 | default: |
529 | goto out; | |
2817b000 | 530 | } |
06222e49 | 531 | |
f0494206 | 532 | if (offset >= 0) { |
2817b000 SW |
533 | if (offset != file->f_pos) { |
534 | file->f_pos = offset; | |
535 | file->f_version = 0; | |
9cfa1098 | 536 | fi->flags &= ~CEPH_F_ATEND; |
2817b000 SW |
537 | } |
538 | retval = offset; | |
539 | ||
2817b000 | 540 | if (offset == 0 || |
f0494206 | 541 | fpos_frag(offset) != fi->frag || |
2817b000 | 542 | fpos_off(offset) < fi->offset) { |
fdd4e158 YZ |
543 | /* discard buffered readdir content on seekdir(0), or |
544 | * seek to new frag, or seek prior to current chunk */ | |
2817b000 | 545 | dout("dir_llseek dropping %p content\n", file); |
dcd3cc05 | 546 | reset_readdir(fi, fpos_frag(offset)); |
fdd4e158 YZ |
547 | } else if (fpos_cmp(offset, old_offset) > 0) { |
548 | /* reset dir_release_count if we did a forward seek */ | |
549 | fi->dir_release_count = 0; | |
550 | fi->readdir_cache_idx = -1; | |
2817b000 | 551 | } |
2817b000 | 552 | } |
06222e49 | 553 | out: |
5955102c | 554 | inode_unlock(inode); |
2817b000 SW |
555 | return retval; |
556 | } | |
557 | ||
558 | /* | |
468640e3 | 559 | * Handle lookups for the hidden .snap directory. |
2817b000 | 560 | */ |
468640e3 SW |
561 | int ceph_handle_snapdir(struct ceph_mds_request *req, |
562 | struct dentry *dentry, int err) | |
2817b000 | 563 | { |
3d14c5d2 | 564 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
2b0143b5 | 565 | struct inode *parent = d_inode(dentry->d_parent); /* we hold i_mutex */ |
2817b000 SW |
566 | |
567 | /* .snap dir? */ | |
568 | if (err == -ENOENT && | |
455cec0a | 569 | ceph_snap(parent) == CEPH_NOSNAP && |
6b805185 | 570 | strcmp(dentry->d_name.name, |
3d14c5d2 | 571 | fsc->mount_options->snapdir_name) == 0) { |
2817b000 | 572 | struct inode *inode = ceph_get_snapdir(parent); |
a455589f AV |
573 | dout("ENOENT on snapdir %p '%pd', linking to snapdir %p\n", |
574 | dentry, dentry, inode); | |
9358c6d4 | 575 | BUG_ON(!d_unhashed(dentry)); |
2817b000 SW |
576 | d_add(dentry, inode); |
577 | err = 0; | |
578 | } | |
468640e3 SW |
579 | return err; |
580 | } | |
2817b000 | 581 | |
468640e3 SW |
582 | /* |
583 | * Figure out final result of a lookup/open request. | |
584 | * | |
585 | * Mainly, make sure we return the final req->r_dentry (if it already | |
586 | * existed) in place of the original VFS-provided dentry when they | |
587 | * differ. | |
588 | * | |
589 | * Gracefully handle the case where the MDS replies with -ENOENT and | |
590 | * no trace (which it may do, at its discretion, e.g., if it doesn't | |
591 | * care to issue a lease on the negative dentry). | |
592 | */ | |
593 | struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, | |
594 | struct dentry *dentry, int err) | |
595 | { | |
2817b000 SW |
596 | if (err == -ENOENT) { |
597 | /* no trace? */ | |
598 | err = 0; | |
599 | if (!req->r_reply_info.head->is_dentry) { | |
600 | dout("ENOENT and no trace, dentry %p inode %p\n", | |
2b0143b5 DH |
601 | dentry, d_inode(dentry)); |
602 | if (d_really_is_positive(dentry)) { | |
2817b000 SW |
603 | d_drop(dentry); |
604 | err = -ENOENT; | |
605 | } else { | |
606 | d_add(dentry, NULL); | |
607 | } | |
608 | } | |
609 | } | |
610 | if (err) | |
611 | dentry = ERR_PTR(err); | |
612 | else if (dentry != req->r_dentry) | |
613 | dentry = dget(req->r_dentry); /* we got spliced */ | |
614 | else | |
615 | dentry = NULL; | |
616 | return dentry; | |
617 | } | |
618 | ||
1d1de916 SW |
619 | static int is_root_ceph_dentry(struct inode *inode, struct dentry *dentry) |
620 | { | |
621 | return ceph_ino(inode) == CEPH_INO_ROOT && | |
622 | strncmp(dentry->d_name.name, ".ceph", 5) == 0; | |
623 | } | |
624 | ||
2817b000 SW |
625 | /* |
626 | * Look up a single dir entry. If there is a lookup intent, inform | |
627 | * the MDS so that it gets our 'caps wanted' value in a single op. | |
628 | */ | |
629 | static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry, | |
00cd8dd3 | 630 | unsigned int flags) |
2817b000 | 631 | { |
3d14c5d2 YS |
632 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
633 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
634 | struct ceph_mds_request *req; |
635 | int op; | |
315f2408 | 636 | int mask; |
2817b000 SW |
637 | int err; |
638 | ||
a455589f AV |
639 | dout("lookup %p dentry %p '%pd'\n", |
640 | dir, dentry, dentry); | |
2817b000 SW |
641 | |
642 | if (dentry->d_name.len > NAME_MAX) | |
643 | return ERR_PTR(-ENAMETOOLONG); | |
644 | ||
645 | err = ceph_init_dentry(dentry); | |
646 | if (err < 0) | |
647 | return ERR_PTR(err); | |
648 | ||
2817b000 | 649 | /* can we conclude ENOENT locally? */ |
2b0143b5 | 650 | if (d_really_is_negative(dentry)) { |
2817b000 SW |
651 | struct ceph_inode_info *ci = ceph_inode(dir); |
652 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
653 | ||
be655596 | 654 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
655 | dout(" dir %p flags are %d\n", dir, ci->i_ceph_flags); |
656 | if (strncmp(dentry->d_name.name, | |
3d14c5d2 | 657 | fsc->mount_options->snapdir_name, |
2817b000 | 658 | dentry->d_name.len) && |
1d1de916 | 659 | !is_root_ceph_dentry(dir, dentry) && |
e2c3de04 | 660 | ceph_test_mount_opt(fsc, DCACHE) && |
2f276c51 | 661 | __ceph_dir_is_complete(ci) && |
2817b000 | 662 | (__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) { |
be655596 | 663 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
664 | dout(" dir %p complete, -ENOENT\n", dir); |
665 | d_add(dentry, NULL); | |
666 | di->lease_shared_gen = ci->i_shared_gen; | |
667 | return NULL; | |
668 | } | |
be655596 | 669 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
670 | } |
671 | ||
672 | op = ceph_snap(dir) == CEPH_SNAPDIR ? | |
673 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; | |
674 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); | |
675 | if (IS_ERR(req)) | |
7e34bc52 | 676 | return ERR_CAST(req); |
2817b000 SW |
677 | req->r_dentry = dget(dentry); |
678 | req->r_num_caps = 2; | |
315f2408 YZ |
679 | |
680 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
681 | if (ceph_security_xattr_wanted(dir)) | |
682 | mask |= CEPH_CAP_XATTR_SHARED; | |
683 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
684 | ||
2817b000 SW |
685 | req->r_locked_dir = dir; |
686 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
468640e3 | 687 | err = ceph_handle_snapdir(req, dentry, err); |
2817b000 SW |
688 | dentry = ceph_finish_lookup(req, dentry, err); |
689 | ceph_mdsc_put_request(req); /* will dput(dentry) */ | |
690 | dout("lookup result=%p\n", dentry); | |
691 | return dentry; | |
692 | } | |
693 | ||
694 | /* | |
695 | * If we do a create but get no trace back from the MDS, follow up with | |
696 | * a lookup (the VFS expects us to link up the provided dentry). | |
697 | */ | |
698 | int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry) | |
699 | { | |
00cd8dd3 | 700 | struct dentry *result = ceph_lookup(dir, dentry, 0); |
2817b000 SW |
701 | |
702 | if (result && !IS_ERR(result)) { | |
703 | /* | |
704 | * We created the item, then did a lookup, and found | |
705 | * it was already linked to another inode we already | |
4d41cef2 YZ |
706 | * had in our cache (and thus got spliced). To not |
707 | * confuse VFS (especially when inode is a directory), | |
708 | * we don't link our dentry to that inode, return an | |
709 | * error instead. | |
710 | * | |
711 | * This event should be rare and it happens only when | |
712 | * we talk to old MDS. Recent MDS does not send traceless | |
713 | * reply for request that creates new inode. | |
2817b000 | 714 | */ |
5cba372c | 715 | d_drop(result); |
4d41cef2 | 716 | return -ESTALE; |
2817b000 SW |
717 | } |
718 | return PTR_ERR(result); | |
719 | } | |
720 | ||
721 | static int ceph_mknod(struct inode *dir, struct dentry *dentry, | |
1a67aafb | 722 | umode_t mode, dev_t rdev) |
2817b000 | 723 | { |
3d14c5d2 YS |
724 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
725 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 726 | struct ceph_mds_request *req; |
b1ee94aa | 727 | struct ceph_acls_info acls = {}; |
2817b000 SW |
728 | int err; |
729 | ||
730 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
731 | return -EROFS; | |
732 | ||
b1ee94aa YZ |
733 | err = ceph_pre_init_acls(dir, &mode, &acls); |
734 | if (err < 0) | |
735 | return err; | |
736 | ||
1a67aafb | 737 | dout("mknod in dir %p dentry %p mode 0%ho rdev %d\n", |
2817b000 SW |
738 | dir, dentry, mode, rdev); |
739 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS); | |
740 | if (IS_ERR(req)) { | |
b1ee94aa YZ |
741 | err = PTR_ERR(req); |
742 | goto out; | |
2817b000 SW |
743 | } |
744 | req->r_dentry = dget(dentry); | |
745 | req->r_num_caps = 2; | |
746 | req->r_locked_dir = dir; | |
747 | req->r_args.mknod.mode = cpu_to_le32(mode); | |
748 | req->r_args.mknod.rdev = cpu_to_le32(rdev); | |
749 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
750 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
b1ee94aa YZ |
751 | if (acls.pagelist) { |
752 | req->r_pagelist = acls.pagelist; | |
753 | acls.pagelist = NULL; | |
754 | } | |
2817b000 SW |
755 | err = ceph_mdsc_do_request(mdsc, dir, req); |
756 | if (!err && !req->r_reply_info.head->is_dentry) | |
757 | err = ceph_handle_notrace_create(dir, dentry); | |
758 | ceph_mdsc_put_request(req); | |
b1ee94aa | 759 | out: |
7221fe4c | 760 | if (!err) |
2b0143b5 | 761 | ceph_init_inode_acls(d_inode(dentry), &acls); |
b20a95a0 | 762 | else |
2817b000 | 763 | d_drop(dentry); |
b1ee94aa | 764 | ceph_release_acls_info(&acls); |
2817b000 SW |
765 | return err; |
766 | } | |
767 | ||
4acdaf27 | 768 | static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 769 | bool excl) |
2817b000 | 770 | { |
2d83bde9 | 771 | return ceph_mknod(dir, dentry, mode, 0); |
2817b000 SW |
772 | } |
773 | ||
774 | static int ceph_symlink(struct inode *dir, struct dentry *dentry, | |
775 | const char *dest) | |
776 | { | |
3d14c5d2 YS |
777 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
778 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
779 | struct ceph_mds_request *req; |
780 | int err; | |
781 | ||
782 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
783 | return -EROFS; | |
784 | ||
785 | dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest); | |
786 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS); | |
787 | if (IS_ERR(req)) { | |
b1ee94aa YZ |
788 | err = PTR_ERR(req); |
789 | goto out; | |
2817b000 | 790 | } |
687265e5 | 791 | req->r_path2 = kstrdup(dest, GFP_KERNEL); |
a149bb9a SK |
792 | if (!req->r_path2) { |
793 | err = -ENOMEM; | |
794 | ceph_mdsc_put_request(req); | |
795 | goto out; | |
796 | } | |
2817b000 | 797 | req->r_locked_dir = dir; |
a149bb9a SK |
798 | req->r_dentry = dget(dentry); |
799 | req->r_num_caps = 2; | |
2817b000 SW |
800 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
801 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
802 | err = ceph_mdsc_do_request(mdsc, dir, req); | |
803 | if (!err && !req->r_reply_info.head->is_dentry) | |
804 | err = ceph_handle_notrace_create(dir, dentry); | |
805 | ceph_mdsc_put_request(req); | |
b1ee94aa YZ |
806 | out: |
807 | if (err) | |
2817b000 SW |
808 | d_drop(dentry); |
809 | return err; | |
810 | } | |
811 | ||
18bb1db3 | 812 | static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
2817b000 | 813 | { |
3d14c5d2 YS |
814 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
815 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 816 | struct ceph_mds_request *req; |
b1ee94aa | 817 | struct ceph_acls_info acls = {}; |
2817b000 SW |
818 | int err = -EROFS; |
819 | int op; | |
820 | ||
821 | if (ceph_snap(dir) == CEPH_SNAPDIR) { | |
822 | /* mkdir .snap/foo is a MKSNAP */ | |
823 | op = CEPH_MDS_OP_MKSNAP; | |
a455589f AV |
824 | dout("mksnap dir %p snap '%pd' dn %p\n", dir, |
825 | dentry, dentry); | |
2817b000 | 826 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { |
18bb1db3 | 827 | dout("mkdir dir %p dn %p mode 0%ho\n", dir, dentry, mode); |
2817b000 SW |
828 | op = CEPH_MDS_OP_MKDIR; |
829 | } else { | |
830 | goto out; | |
831 | } | |
b1ee94aa YZ |
832 | |
833 | mode |= S_IFDIR; | |
834 | err = ceph_pre_init_acls(dir, &mode, &acls); | |
835 | if (err < 0) | |
836 | goto out; | |
837 | ||
2817b000 SW |
838 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
839 | if (IS_ERR(req)) { | |
840 | err = PTR_ERR(req); | |
841 | goto out; | |
842 | } | |
843 | ||
844 | req->r_dentry = dget(dentry); | |
845 | req->r_num_caps = 2; | |
846 | req->r_locked_dir = dir; | |
847 | req->r_args.mkdir.mode = cpu_to_le32(mode); | |
848 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
849 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
b1ee94aa YZ |
850 | if (acls.pagelist) { |
851 | req->r_pagelist = acls.pagelist; | |
852 | acls.pagelist = NULL; | |
853 | } | |
2817b000 | 854 | err = ceph_mdsc_do_request(mdsc, dir, req); |
275dd19e YZ |
855 | if (!err && |
856 | !req->r_reply_info.head->is_target && | |
857 | !req->r_reply_info.head->is_dentry) | |
2817b000 SW |
858 | err = ceph_handle_notrace_create(dir, dentry); |
859 | ceph_mdsc_put_request(req); | |
860 | out: | |
b20a95a0 | 861 | if (!err) |
2b0143b5 | 862 | ceph_init_inode_acls(d_inode(dentry), &acls); |
b20a95a0 | 863 | else |
2817b000 | 864 | d_drop(dentry); |
b1ee94aa | 865 | ceph_release_acls_info(&acls); |
2817b000 SW |
866 | return err; |
867 | } | |
868 | ||
869 | static int ceph_link(struct dentry *old_dentry, struct inode *dir, | |
870 | struct dentry *dentry) | |
871 | { | |
3d14c5d2 YS |
872 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
873 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
874 | struct ceph_mds_request *req; |
875 | int err; | |
876 | ||
877 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
878 | return -EROFS; | |
879 | ||
880 | dout("link in dir %p old_dentry %p dentry %p\n", dir, | |
881 | old_dentry, dentry); | |
882 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS); | |
883 | if (IS_ERR(req)) { | |
884 | d_drop(dentry); | |
885 | return PTR_ERR(req); | |
886 | } | |
887 | req->r_dentry = dget(dentry); | |
888 | req->r_num_caps = 2; | |
4b58c9b1 | 889 | req->r_old_dentry = dget(old_dentry); |
2817b000 SW |
890 | req->r_locked_dir = dir; |
891 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
892 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
ad88f23f YZ |
893 | /* release LINK_SHARED on source inode (mds will lock it) */ |
894 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; | |
2817b000 | 895 | err = ceph_mdsc_do_request(mdsc, dir, req); |
70b666c3 | 896 | if (err) { |
2817b000 | 897 | d_drop(dentry); |
70b666c3 | 898 | } else if (!req->r_reply_info.head->is_dentry) { |
2b0143b5 DH |
899 | ihold(d_inode(old_dentry)); |
900 | d_instantiate(dentry, d_inode(old_dentry)); | |
70b666c3 | 901 | } |
2817b000 SW |
902 | ceph_mdsc_put_request(req); |
903 | return err; | |
904 | } | |
905 | ||
906 | /* | |
907 | * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it | |
908 | * looks like the link count will hit 0, drop any other caps (other | |
909 | * than PIN) we don't specifically want (due to the file still being | |
910 | * open). | |
911 | */ | |
912 | static int drop_caps_for_unlink(struct inode *inode) | |
913 | { | |
914 | struct ceph_inode_info *ci = ceph_inode(inode); | |
915 | int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL; | |
916 | ||
be655596 | 917 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
918 | if (inode->i_nlink == 1) { |
919 | drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN); | |
920 | ci->i_ceph_flags |= CEPH_I_NODELAY; | |
921 | } | |
be655596 | 922 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
923 | return drop; |
924 | } | |
925 | ||
926 | /* | |
927 | * rmdir and unlink are differ only by the metadata op code | |
928 | */ | |
929 | static int ceph_unlink(struct inode *dir, struct dentry *dentry) | |
930 | { | |
3d14c5d2 YS |
931 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
932 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2b0143b5 | 933 | struct inode *inode = d_inode(dentry); |
2817b000 SW |
934 | struct ceph_mds_request *req; |
935 | int err = -EROFS; | |
936 | int op; | |
937 | ||
938 | if (ceph_snap(dir) == CEPH_SNAPDIR) { | |
939 | /* rmdir .snap/foo is RMSNAP */ | |
a455589f | 940 | dout("rmsnap dir %p '%pd' dn %p\n", dir, dentry, dentry); |
2817b000 SW |
941 | op = CEPH_MDS_OP_RMSNAP; |
942 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { | |
943 | dout("unlink/rmdir dir %p dn %p inode %p\n", | |
944 | dir, dentry, inode); | |
e36cb0b8 | 945 | op = d_is_dir(dentry) ? |
2817b000 SW |
946 | CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK; |
947 | } else | |
948 | goto out; | |
949 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); | |
950 | if (IS_ERR(req)) { | |
951 | err = PTR_ERR(req); | |
952 | goto out; | |
953 | } | |
954 | req->r_dentry = dget(dentry); | |
955 | req->r_num_caps = 2; | |
956 | req->r_locked_dir = dir; | |
957 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
958 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
959 | req->r_inode_drop = drop_caps_for_unlink(inode); | |
960 | err = ceph_mdsc_do_request(mdsc, dir, req); | |
961 | if (!err && !req->r_reply_info.head->is_dentry) | |
962 | d_delete(dentry); | |
963 | ceph_mdsc_put_request(req); | |
964 | out: | |
965 | return err; | |
966 | } | |
967 | ||
968 | static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry, | |
969 | struct inode *new_dir, struct dentry *new_dentry) | |
970 | { | |
3d14c5d2 YS |
971 | struct ceph_fs_client *fsc = ceph_sb_to_client(old_dir->i_sb); |
972 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 973 | struct ceph_mds_request *req; |
0ea611a3 | 974 | int op = CEPH_MDS_OP_RENAME; |
2817b000 SW |
975 | int err; |
976 | ||
977 | if (ceph_snap(old_dir) != ceph_snap(new_dir)) | |
978 | return -EXDEV; | |
0ea611a3 YZ |
979 | if (ceph_snap(old_dir) != CEPH_NOSNAP) { |
980 | if (old_dir == new_dir && ceph_snap(old_dir) == CEPH_SNAPDIR) | |
981 | op = CEPH_MDS_OP_RENAMESNAP; | |
982 | else | |
983 | return -EROFS; | |
984 | } | |
2817b000 SW |
985 | dout("rename dir %p dentry %p to dir %p dentry %p\n", |
986 | old_dir, old_dentry, new_dir, new_dentry); | |
0ea611a3 | 987 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
2817b000 SW |
988 | if (IS_ERR(req)) |
989 | return PTR_ERR(req); | |
180061a5 | 990 | ihold(old_dir); |
2817b000 SW |
991 | req->r_dentry = dget(new_dentry); |
992 | req->r_num_caps = 2; | |
993 | req->r_old_dentry = dget(old_dentry); | |
180061a5 | 994 | req->r_old_dentry_dir = old_dir; |
2817b000 SW |
995 | req->r_locked_dir = new_dir; |
996 | req->r_old_dentry_drop = CEPH_CAP_FILE_SHARED; | |
997 | req->r_old_dentry_unless = CEPH_CAP_FILE_EXCL; | |
998 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
999 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1000 | /* release LINK_RDCACHE on source inode (mds will lock it) */ | |
1001 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; | |
2b0143b5 DH |
1002 | if (d_really_is_positive(new_dentry)) |
1003 | req->r_inode_drop = drop_caps_for_unlink(d_inode(new_dentry)); | |
2817b000 SW |
1004 | err = ceph_mdsc_do_request(mdsc, old_dir, req); |
1005 | if (!err && !req->r_reply_info.head->is_dentry) { | |
1006 | /* | |
1007 | * Normally d_move() is done by fill_trace (called by | |
1008 | * do_request, above). If there is no trace, we need | |
1009 | * to do it here. | |
1010 | */ | |
ea1409f9 | 1011 | |
fdd4e158 YZ |
1012 | /* d_move screws up sibling dentries' offsets */ |
1013 | ceph_dir_clear_complete(old_dir); | |
1014 | ceph_dir_clear_complete(new_dir); | |
1015 | ||
2817b000 | 1016 | d_move(old_dentry, new_dentry); |
ea1409f9 SW |
1017 | |
1018 | /* ensure target dentry is invalidated, despite | |
1019 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d | 1020 | ceph_invalidate_dentry_lease(new_dentry); |
2817b000 SW |
1021 | } |
1022 | ceph_mdsc_put_request(req); | |
1023 | return err; | |
1024 | } | |
1025 | ||
81a6cf2d SW |
1026 | /* |
1027 | * Ensure a dentry lease will no longer revalidate. | |
1028 | */ | |
1029 | void ceph_invalidate_dentry_lease(struct dentry *dentry) | |
1030 | { | |
1031 | spin_lock(&dentry->d_lock); | |
1032 | dentry->d_time = jiffies; | |
1033 | ceph_dentry(dentry)->lease_shared_gen = 0; | |
1034 | spin_unlock(&dentry->d_lock); | |
1035 | } | |
2817b000 SW |
1036 | |
1037 | /* | |
1038 | * Check if dentry lease is valid. If not, delete the lease. Try to | |
1039 | * renew if the least is more than half up. | |
1040 | */ | |
1041 | static int dentry_lease_is_valid(struct dentry *dentry) | |
1042 | { | |
1043 | struct ceph_dentry_info *di; | |
1044 | struct ceph_mds_session *s; | |
1045 | int valid = 0; | |
1046 | u32 gen; | |
1047 | unsigned long ttl; | |
1048 | struct ceph_mds_session *session = NULL; | |
1049 | struct inode *dir = NULL; | |
1050 | u32 seq = 0; | |
1051 | ||
1052 | spin_lock(&dentry->d_lock); | |
1053 | di = ceph_dentry(dentry); | |
3d8eb7a9 | 1054 | if (di->lease_session) { |
2817b000 | 1055 | s = di->lease_session; |
d8fb02ab | 1056 | spin_lock(&s->s_gen_ttl_lock); |
2817b000 SW |
1057 | gen = s->s_cap_gen; |
1058 | ttl = s->s_cap_ttl; | |
d8fb02ab | 1059 | spin_unlock(&s->s_gen_ttl_lock); |
2817b000 SW |
1060 | |
1061 | if (di->lease_gen == gen && | |
1062 | time_before(jiffies, dentry->d_time) && | |
1063 | time_before(jiffies, ttl)) { | |
1064 | valid = 1; | |
1065 | if (di->lease_renew_after && | |
1066 | time_after(jiffies, di->lease_renew_after)) { | |
1067 | /* we should renew */ | |
2b0143b5 | 1068 | dir = d_inode(dentry->d_parent); |
2817b000 SW |
1069 | session = ceph_get_mds_session(s); |
1070 | seq = di->lease_seq; | |
1071 | di->lease_renew_after = 0; | |
1072 | di->lease_renew_from = jiffies; | |
1073 | } | |
2817b000 SW |
1074 | } |
1075 | } | |
1076 | spin_unlock(&dentry->d_lock); | |
1077 | ||
1078 | if (session) { | |
1079 | ceph_mdsc_lease_send_msg(session, dir, dentry, | |
1080 | CEPH_MDS_LEASE_RENEW, seq); | |
1081 | ceph_put_mds_session(session); | |
1082 | } | |
1083 | dout("dentry_lease_is_valid - dentry %p = %d\n", dentry, valid); | |
1084 | return valid; | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * Check if directory-wide content lease/cap is valid. | |
1089 | */ | |
1090 | static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry) | |
1091 | { | |
1092 | struct ceph_inode_info *ci = ceph_inode(dir); | |
1093 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
1094 | int valid = 0; | |
1095 | ||
be655596 | 1096 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
1097 | if (ci->i_shared_gen == di->lease_shared_gen) |
1098 | valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1); | |
be655596 | 1099 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
1100 | dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n", |
1101 | dir, (unsigned)ci->i_shared_gen, dentry, | |
1102 | (unsigned)di->lease_shared_gen, valid); | |
1103 | return valid; | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * Check if cached dentry can be trusted. | |
1108 | */ | |
0b728e19 | 1109 | static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags) |
2817b000 | 1110 | { |
bf1c6aca | 1111 | int valid = 0; |
641235d8 | 1112 | struct dentry *parent; |
34286d66 NP |
1113 | struct inode *dir; |
1114 | ||
0b728e19 | 1115 | if (flags & LOOKUP_RCU) |
34286d66 NP |
1116 | return -ECHILD; |
1117 | ||
a455589f | 1118 | dout("d_revalidate %p '%pd' inode %p offset %lld\n", dentry, |
2b0143b5 | 1119 | dentry, d_inode(dentry), ceph_dentry(dentry)->offset); |
2817b000 | 1120 | |
641235d8 YZ |
1121 | parent = dget_parent(dentry); |
1122 | dir = d_inode(parent); | |
bf1c6aca | 1123 | |
2817b000 SW |
1124 | /* always trust cached snapped dentries, snapdir dentry */ |
1125 | if (ceph_snap(dir) != CEPH_NOSNAP) { | |
a455589f | 1126 | dout("d_revalidate %p '%pd' inode %p is SNAPPED\n", dentry, |
2b0143b5 | 1127 | dentry, d_inode(dentry)); |
bf1c6aca | 1128 | valid = 1; |
2b0143b5 DH |
1129 | } else if (d_really_is_positive(dentry) && |
1130 | ceph_snap(d_inode(dentry)) == CEPH_SNAPDIR) { | |
bf1c6aca SW |
1131 | valid = 1; |
1132 | } else if (dentry_lease_is_valid(dentry) || | |
1133 | dir_lease_is_valid(dir, dentry)) { | |
2b0143b5 DH |
1134 | if (d_really_is_positive(dentry)) |
1135 | valid = ceph_is_any_caps(d_inode(dentry)); | |
9215aeea YZ |
1136 | else |
1137 | valid = 1; | |
2817b000 | 1138 | } |
2817b000 | 1139 | |
200fd27c YZ |
1140 | if (!valid) { |
1141 | struct ceph_mds_client *mdsc = | |
1142 | ceph_sb_to_client(dir->i_sb)->mdsc; | |
1143 | struct ceph_mds_request *req; | |
1144 | int op, mask, err; | |
1145 | ||
1146 | op = ceph_snap(dir) == CEPH_SNAPDIR ? | |
1147 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; | |
1148 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); | |
1149 | if (!IS_ERR(req)) { | |
1150 | req->r_dentry = dget(dentry); | |
1151 | req->r_num_caps = 2; | |
1152 | ||
1153 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
1154 | if (ceph_security_xattr_wanted(dir)) | |
1155 | mask |= CEPH_CAP_XATTR_SHARED; | |
1156 | req->r_args.getattr.mask = mask; | |
1157 | ||
1158 | req->r_locked_dir = dir; | |
1159 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
1160 | if (err == 0 || err == -ENOENT) { | |
1161 | if (dentry == req->r_dentry) { | |
1162 | valid = !d_unhashed(dentry); | |
1163 | } else { | |
1164 | d_invalidate(req->r_dentry); | |
1165 | err = -EAGAIN; | |
1166 | } | |
1167 | } | |
1168 | ceph_mdsc_put_request(req); | |
1169 | dout("d_revalidate %p lookup result=%d\n", | |
1170 | dentry, err); | |
1171 | } | |
1172 | } | |
1173 | ||
bf1c6aca | 1174 | dout("d_revalidate %p %s\n", dentry, valid ? "valid" : "invalid"); |
9215aeea | 1175 | if (valid) { |
bf1c6aca | 1176 | ceph_dentry_lru_touch(dentry); |
9215aeea YZ |
1177 | } else { |
1178 | ceph_dir_clear_complete(dir); | |
9215aeea | 1179 | } |
641235d8 YZ |
1180 | |
1181 | dput(parent); | |
bf1c6aca | 1182 | return valid; |
2817b000 SW |
1183 | } |
1184 | ||
1185 | /* | |
147851d2 | 1186 | * Release our ceph_dentry_info. |
2817b000 | 1187 | */ |
147851d2 | 1188 | static void ceph_d_release(struct dentry *dentry) |
2817b000 SW |
1189 | { |
1190 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
2817b000 | 1191 | |
147851d2 | 1192 | dout("d_release %p\n", dentry); |
3d8eb7a9 SW |
1193 | ceph_dentry_lru_del(dentry); |
1194 | if (di->lease_session) | |
1195 | ceph_put_mds_session(di->lease_session); | |
1196 | kmem_cache_free(ceph_dentry_cachep, di); | |
1197 | dentry->d_fsdata = NULL; | |
2817b000 SW |
1198 | } |
1199 | ||
1200 | static int ceph_snapdir_d_revalidate(struct dentry *dentry, | |
0b728e19 | 1201 | unsigned int flags) |
2817b000 SW |
1202 | { |
1203 | /* | |
1204 | * Eventually, we'll want to revalidate snapped metadata | |
1205 | * too... probably... | |
1206 | */ | |
1207 | return 1; | |
1208 | } | |
1209 | ||
b58dc410 SW |
1210 | /* |
1211 | * When the VFS prunes a dentry from the cache, we need to clear the | |
1212 | * complete flag on the parent directory. | |
1213 | * | |
1214 | * Called under dentry->d_lock. | |
1215 | */ | |
1216 | static void ceph_d_prune(struct dentry *dentry) | |
1217 | { | |
774ac21d | 1218 | dout("ceph_d_prune %p\n", dentry); |
b58dc410 SW |
1219 | |
1220 | /* do we have a valid parent? */ | |
8842b3be | 1221 | if (IS_ROOT(dentry)) |
b58dc410 SW |
1222 | return; |
1223 | ||
2f276c51 | 1224 | /* if we are not hashed, we don't affect dir's completeness */ |
b58dc410 SW |
1225 | if (d_unhashed(dentry)) |
1226 | return; | |
2817b000 | 1227 | |
b58dc410 SW |
1228 | /* |
1229 | * we hold d_lock, so d_parent is stable, and d_fsdata is never | |
1230 | * cleared until d_release | |
1231 | */ | |
2b0143b5 | 1232 | ceph_dir_clear_complete(d_inode(dentry->d_parent)); |
b58dc410 | 1233 | } |
2817b000 SW |
1234 | |
1235 | /* | |
1236 | * read() on a dir. This weird interface hack only works if mounted | |
1237 | * with '-o dirstat'. | |
1238 | */ | |
1239 | static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, | |
1240 | loff_t *ppos) | |
1241 | { | |
1242 | struct ceph_file_info *cf = file->private_data; | |
496ad9aa | 1243 | struct inode *inode = file_inode(file); |
2817b000 SW |
1244 | struct ceph_inode_info *ci = ceph_inode(inode); |
1245 | int left; | |
ae598083 | 1246 | const int bufsize = 1024; |
2817b000 | 1247 | |
3d14c5d2 | 1248 | if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT)) |
2817b000 SW |
1249 | return -EISDIR; |
1250 | ||
1251 | if (!cf->dir_info) { | |
687265e5 | 1252 | cf->dir_info = kmalloc(bufsize, GFP_KERNEL); |
2817b000 SW |
1253 | if (!cf->dir_info) |
1254 | return -ENOMEM; | |
1255 | cf->dir_info_len = | |
ae598083 | 1256 | snprintf(cf->dir_info, bufsize, |
2817b000 SW |
1257 | "entries: %20lld\n" |
1258 | " files: %20lld\n" | |
1259 | " subdirs: %20lld\n" | |
1260 | "rentries: %20lld\n" | |
1261 | " rfiles: %20lld\n" | |
1262 | " rsubdirs: %20lld\n" | |
1263 | "rbytes: %20lld\n" | |
1264 | "rctime: %10ld.%09ld\n", | |
1265 | ci->i_files + ci->i_subdirs, | |
1266 | ci->i_files, | |
1267 | ci->i_subdirs, | |
1268 | ci->i_rfiles + ci->i_rsubdirs, | |
1269 | ci->i_rfiles, | |
1270 | ci->i_rsubdirs, | |
1271 | ci->i_rbytes, | |
1272 | (long)ci->i_rctime.tv_sec, | |
1273 | (long)ci->i_rctime.tv_nsec); | |
1274 | } | |
1275 | ||
1276 | if (*ppos >= cf->dir_info_len) | |
1277 | return 0; | |
1278 | size = min_t(unsigned, size, cf->dir_info_len-*ppos); | |
1279 | left = copy_to_user(buf, cf->dir_info + *ppos, size); | |
1280 | if (left == size) | |
1281 | return -EFAULT; | |
1282 | *ppos += (size - left); | |
1283 | return size - left; | |
1284 | } | |
1285 | ||
2817b000 SW |
1286 | /* |
1287 | * We maintain a private dentry LRU. | |
1288 | * | |
1289 | * FIXME: this needs to be changed to a per-mds lru to be useful. | |
1290 | */ | |
1291 | void ceph_dentry_lru_add(struct dentry *dn) | |
1292 | { | |
1293 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1294 | struct ceph_mds_client *mdsc; | |
2817b000 | 1295 | |
a455589f | 1296 | dout("dentry_lru_add %p %p '%pd'\n", di, dn, dn); |
3d8eb7a9 SW |
1297 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1298 | spin_lock(&mdsc->dentry_lru_lock); | |
1299 | list_add_tail(&di->lru, &mdsc->dentry_lru); | |
1300 | mdsc->num_dentry++; | |
1301 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1302 | } |
1303 | ||
1304 | void ceph_dentry_lru_touch(struct dentry *dn) | |
1305 | { | |
1306 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1307 | struct ceph_mds_client *mdsc; | |
2817b000 | 1308 | |
a455589f AV |
1309 | dout("dentry_lru_touch %p %p '%pd' (offset %lld)\n", di, dn, dn, |
1310 | di->offset); | |
3d8eb7a9 SW |
1311 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1312 | spin_lock(&mdsc->dentry_lru_lock); | |
1313 | list_move_tail(&di->lru, &mdsc->dentry_lru); | |
1314 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1315 | } |
1316 | ||
1317 | void ceph_dentry_lru_del(struct dentry *dn) | |
1318 | { | |
1319 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1320 | struct ceph_mds_client *mdsc; | |
1321 | ||
a455589f | 1322 | dout("dentry_lru_del %p %p '%pd'\n", di, dn, dn); |
3d8eb7a9 SW |
1323 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1324 | spin_lock(&mdsc->dentry_lru_lock); | |
1325 | list_del_init(&di->lru); | |
1326 | mdsc->num_dentry--; | |
1327 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1328 | } |
1329 | ||
6c0f3af7 SW |
1330 | /* |
1331 | * Return name hash for a given dentry. This is dependent on | |
1332 | * the parent directory's hash function. | |
1333 | */ | |
e5f86dc3 | 1334 | unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn) |
6c0f3af7 | 1335 | { |
6c0f3af7 SW |
1336 | struct ceph_inode_info *dci = ceph_inode(dir); |
1337 | ||
1338 | switch (dci->i_dir_layout.dl_dir_hash) { | |
1339 | case 0: /* for backward compat */ | |
1340 | case CEPH_STR_HASH_LINUX: | |
1341 | return dn->d_name.hash; | |
1342 | ||
1343 | default: | |
1344 | return ceph_str_hash(dci->i_dir_layout.dl_dir_hash, | |
1345 | dn->d_name.name, dn->d_name.len); | |
1346 | } | |
1347 | } | |
1348 | ||
2817b000 SW |
1349 | const struct file_operations ceph_dir_fops = { |
1350 | .read = ceph_read_dir, | |
77acfa29 | 1351 | .iterate = ceph_readdir, |
2817b000 SW |
1352 | .llseek = ceph_dir_llseek, |
1353 | .open = ceph_open, | |
1354 | .release = ceph_release, | |
1355 | .unlocked_ioctl = ceph_ioctl, | |
da819c81 | 1356 | .fsync = ceph_fsync, |
2817b000 SW |
1357 | }; |
1358 | ||
38c48b5f YZ |
1359 | const struct file_operations ceph_snapdir_fops = { |
1360 | .iterate = ceph_readdir, | |
1361 | .llseek = ceph_dir_llseek, | |
1362 | .open = ceph_open, | |
1363 | .release = ceph_release, | |
1364 | }; | |
1365 | ||
2817b000 SW |
1366 | const struct inode_operations ceph_dir_iops = { |
1367 | .lookup = ceph_lookup, | |
1368 | .permission = ceph_permission, | |
1369 | .getattr = ceph_getattr, | |
1370 | .setattr = ceph_setattr, | |
1371 | .setxattr = ceph_setxattr, | |
1372 | .getxattr = ceph_getxattr, | |
1373 | .listxattr = ceph_listxattr, | |
1374 | .removexattr = ceph_removexattr, | |
7221fe4c | 1375 | .get_acl = ceph_get_acl, |
72466d0b | 1376 | .set_acl = ceph_set_acl, |
2817b000 SW |
1377 | .mknod = ceph_mknod, |
1378 | .symlink = ceph_symlink, | |
1379 | .mkdir = ceph_mkdir, | |
1380 | .link = ceph_link, | |
1381 | .unlink = ceph_unlink, | |
1382 | .rmdir = ceph_unlink, | |
1383 | .rename = ceph_rename, | |
1384 | .create = ceph_create, | |
2d83bde9 | 1385 | .atomic_open = ceph_atomic_open, |
2817b000 SW |
1386 | }; |
1387 | ||
38c48b5f YZ |
1388 | const struct inode_operations ceph_snapdir_iops = { |
1389 | .lookup = ceph_lookup, | |
1390 | .permission = ceph_permission, | |
1391 | .getattr = ceph_getattr, | |
1392 | .mkdir = ceph_mkdir, | |
1393 | .rmdir = ceph_unlink, | |
0ea611a3 | 1394 | .rename = ceph_rename, |
38c48b5f YZ |
1395 | }; |
1396 | ||
52dfb8ac | 1397 | const struct dentry_operations ceph_dentry_ops = { |
2817b000 | 1398 | .d_revalidate = ceph_d_revalidate, |
147851d2 | 1399 | .d_release = ceph_d_release, |
b58dc410 | 1400 | .d_prune = ceph_d_prune, |
2817b000 SW |
1401 | }; |
1402 | ||
52dfb8ac | 1403 | const struct dentry_operations ceph_snapdir_dentry_ops = { |
2817b000 | 1404 | .d_revalidate = ceph_snapdir_d_revalidate, |
147851d2 | 1405 | .d_release = ceph_d_release, |
2817b000 SW |
1406 | }; |
1407 | ||
52dfb8ac | 1408 | const struct dentry_operations ceph_snap_dentry_ops = { |
147851d2 | 1409 | .d_release = ceph_d_release, |
b58dc410 | 1410 | .d_prune = ceph_d_prune, |
2817b000 | 1411 | }; |