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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); | |
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; | |
7b88dadc SW |
417 | if (ceph_frag_is_rightmost(frag)) |
418 | fi->next_offset = 2; | |
419 | else | |
420 | fi->next_offset = 0; | |
2817b000 | 421 | } else { |
2817b000 SW |
422 | err = note_last_dentry(fi, |
423 | rinfo->dir_dname[rinfo->dir_nr-1], | |
fdd4e158 YZ |
424 | rinfo->dir_dname_len[rinfo->dir_nr-1], |
425 | fi->next_offset + rinfo->dir_nr); | |
2817b000 SW |
426 | if (err) |
427 | return err; | |
2817b000 SW |
428 | } |
429 | } | |
430 | ||
431 | rinfo = &fi->last_readdir->r_reply_info; | |
432 | dout("readdir frag %x num %d off %d chunkoff %d\n", frag, | |
433 | rinfo->dir_nr, off, fi->offset); | |
77acfa29 AV |
434 | |
435 | ctx->pos = ceph_make_fpos(frag, off); | |
da39822c | 436 | while (off >= fi->offset && off - fi->offset < rinfo->dir_nr) { |
2817b000 SW |
437 | struct ceph_mds_reply_inode *in = |
438 | rinfo->dir_in[off - fi->offset].in; | |
3105c19c SW |
439 | struct ceph_vino vino; |
440 | ino_t ino; | |
441 | ||
2817b000 | 442 | dout("readdir off %d (%d/%d) -> %lld '%.*s' %p\n", |
77acfa29 | 443 | off, off - fi->offset, rinfo->dir_nr, ctx->pos, |
2817b000 SW |
444 | rinfo->dir_dname_len[off - fi->offset], |
445 | rinfo->dir_dname[off - fi->offset], in); | |
446 | BUG_ON(!in); | |
447 | ftype = le32_to_cpu(in->mode) >> 12; | |
3105c19c SW |
448 | vino.ino = le64_to_cpu(in->ino); |
449 | vino.snap = le64_to_cpu(in->snapid); | |
450 | ino = ceph_vino_to_ino(vino); | |
77acfa29 | 451 | if (!dir_emit(ctx, |
2817b000 SW |
452 | rinfo->dir_dname[off - fi->offset], |
453 | rinfo->dir_dname_len[off - fi->offset], | |
77acfa29 | 454 | ceph_translate_ino(inode->i_sb, ino), ftype)) { |
2817b000 SW |
455 | dout("filldir stopping us...\n"); |
456 | return 0; | |
457 | } | |
458 | off++; | |
77acfa29 | 459 | ctx->pos++; |
2817b000 SW |
460 | } |
461 | ||
462 | if (fi->last_name) { | |
463 | ceph_mdsc_put_request(fi->last_readdir); | |
464 | fi->last_readdir = NULL; | |
465 | goto more; | |
466 | } | |
467 | ||
468 | /* more frags? */ | |
469 | if (!ceph_frag_is_rightmost(frag)) { | |
470 | frag = ceph_frag_next(frag); | |
471 | off = 0; | |
77acfa29 | 472 | ctx->pos = ceph_make_fpos(frag, off); |
2817b000 SW |
473 | dout("readdir next frag is %x\n", frag); |
474 | goto more; | |
475 | } | |
9cfa1098 | 476 | fi->flags |= CEPH_F_ATEND; |
2817b000 SW |
477 | |
478 | /* | |
479 | * if dir_release_count still matches the dir, no dentries | |
480 | * were released during the whole readdir, and we should have | |
481 | * the complete dir contents in our cache. | |
482 | */ | |
fdd4e158 YZ |
483 | if (atomic64_read(&ci->i_release_count) == fi->dir_release_count) { |
484 | spin_lock(&ci->i_ceph_lock); | |
485 | if (fi->dir_ordered_count == atomic64_read(&ci->i_ordered_count)) { | |
70db4f36 | 486 | dout(" marking %p complete and ordered\n", inode); |
fdd4e158 YZ |
487 | /* use i_size to track number of entries in |
488 | * readdir cache */ | |
489 | BUG_ON(fi->readdir_cache_idx < 0); | |
490 | i_size_write(inode, fi->readdir_cache_idx * | |
491 | sizeof(struct dentry*)); | |
492 | } else { | |
70db4f36 | 493 | dout(" marking %p complete\n", inode); |
fdd4e158 | 494 | } |
70db4f36 YZ |
495 | __ceph_dir_set_complete(ci, fi->dir_release_count, |
496 | fi->dir_ordered_count); | |
fdd4e158 | 497 | spin_unlock(&ci->i_ceph_lock); |
2817b000 | 498 | } |
2817b000 | 499 | |
77acfa29 | 500 | dout("readdir %p file %p done.\n", inode, file); |
2817b000 SW |
501 | return 0; |
502 | } | |
503 | ||
dcd3cc05 | 504 | static void reset_readdir(struct ceph_file_info *fi, unsigned frag) |
2817b000 SW |
505 | { |
506 | if (fi->last_readdir) { | |
507 | ceph_mdsc_put_request(fi->last_readdir); | |
508 | fi->last_readdir = NULL; | |
509 | } | |
510 | kfree(fi->last_name); | |
a1629c3b | 511 | fi->last_name = NULL; |
fdd4e158 YZ |
512 | fi->dir_release_count = 0; |
513 | fi->readdir_cache_idx = -1; | |
dcd3cc05 YZ |
514 | if (ceph_frag_is_leftmost(frag)) |
515 | fi->next_offset = 2; /* compensate for . and .. */ | |
516 | else | |
517 | fi->next_offset = 0; | |
9cfa1098 | 518 | fi->flags &= ~CEPH_F_ATEND; |
2817b000 SW |
519 | } |
520 | ||
965c8e59 | 521 | static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence) |
2817b000 SW |
522 | { |
523 | struct ceph_file_info *fi = file->private_data; | |
524 | struct inode *inode = file->f_mapping->host; | |
f0494206 | 525 | loff_t old_offset = ceph_make_fpos(fi->frag, fi->next_offset); |
2817b000 SW |
526 | loff_t retval; |
527 | ||
5955102c | 528 | inode_lock(inode); |
06222e49 | 529 | retval = -EINVAL; |
965c8e59 | 530 | switch (whence) { |
2817b000 SW |
531 | case SEEK_CUR: |
532 | offset += file->f_pos; | |
06222e49 JB |
533 | case SEEK_SET: |
534 | break; | |
fdd4e158 YZ |
535 | case SEEK_END: |
536 | retval = -EOPNOTSUPP; | |
06222e49 JB |
537 | default: |
538 | goto out; | |
2817b000 | 539 | } |
06222e49 | 540 | |
f0494206 | 541 | if (offset >= 0) { |
2817b000 SW |
542 | if (offset != file->f_pos) { |
543 | file->f_pos = offset; | |
544 | file->f_version = 0; | |
9cfa1098 | 545 | fi->flags &= ~CEPH_F_ATEND; |
2817b000 SW |
546 | } |
547 | retval = offset; | |
548 | ||
2817b000 | 549 | if (offset == 0 || |
f0494206 | 550 | fpos_frag(offset) != fi->frag || |
2817b000 | 551 | fpos_off(offset) < fi->offset) { |
fdd4e158 YZ |
552 | /* discard buffered readdir content on seekdir(0), or |
553 | * seek to new frag, or seek prior to current chunk */ | |
2817b000 | 554 | dout("dir_llseek dropping %p content\n", file); |
dcd3cc05 | 555 | reset_readdir(fi, fpos_frag(offset)); |
fdd4e158 YZ |
556 | } else if (fpos_cmp(offset, old_offset) > 0) { |
557 | /* reset dir_release_count if we did a forward seek */ | |
558 | fi->dir_release_count = 0; | |
559 | fi->readdir_cache_idx = -1; | |
2817b000 | 560 | } |
2817b000 | 561 | } |
06222e49 | 562 | out: |
5955102c | 563 | inode_unlock(inode); |
2817b000 SW |
564 | return retval; |
565 | } | |
566 | ||
567 | /* | |
468640e3 | 568 | * Handle lookups for the hidden .snap directory. |
2817b000 | 569 | */ |
468640e3 SW |
570 | int ceph_handle_snapdir(struct ceph_mds_request *req, |
571 | struct dentry *dentry, int err) | |
2817b000 | 572 | { |
3d14c5d2 | 573 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
2b0143b5 | 574 | struct inode *parent = d_inode(dentry->d_parent); /* we hold i_mutex */ |
2817b000 SW |
575 | |
576 | /* .snap dir? */ | |
577 | if (err == -ENOENT && | |
455cec0a | 578 | ceph_snap(parent) == CEPH_NOSNAP && |
6b805185 | 579 | strcmp(dentry->d_name.name, |
3d14c5d2 | 580 | fsc->mount_options->snapdir_name) == 0) { |
2817b000 | 581 | struct inode *inode = ceph_get_snapdir(parent); |
a455589f AV |
582 | dout("ENOENT on snapdir %p '%pd', linking to snapdir %p\n", |
583 | dentry, dentry, inode); | |
9358c6d4 | 584 | BUG_ON(!d_unhashed(dentry)); |
2817b000 SW |
585 | d_add(dentry, inode); |
586 | err = 0; | |
587 | } | |
468640e3 SW |
588 | return err; |
589 | } | |
2817b000 | 590 | |
468640e3 SW |
591 | /* |
592 | * Figure out final result of a lookup/open request. | |
593 | * | |
594 | * Mainly, make sure we return the final req->r_dentry (if it already | |
595 | * existed) in place of the original VFS-provided dentry when they | |
596 | * differ. | |
597 | * | |
598 | * Gracefully handle the case where the MDS replies with -ENOENT and | |
599 | * no trace (which it may do, at its discretion, e.g., if it doesn't | |
600 | * care to issue a lease on the negative dentry). | |
601 | */ | |
602 | struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, | |
603 | struct dentry *dentry, int err) | |
604 | { | |
2817b000 SW |
605 | if (err == -ENOENT) { |
606 | /* no trace? */ | |
607 | err = 0; | |
608 | if (!req->r_reply_info.head->is_dentry) { | |
609 | dout("ENOENT and no trace, dentry %p inode %p\n", | |
2b0143b5 DH |
610 | dentry, d_inode(dentry)); |
611 | if (d_really_is_positive(dentry)) { | |
2817b000 SW |
612 | d_drop(dentry); |
613 | err = -ENOENT; | |
614 | } else { | |
615 | d_add(dentry, NULL); | |
616 | } | |
617 | } | |
618 | } | |
619 | if (err) | |
620 | dentry = ERR_PTR(err); | |
621 | else if (dentry != req->r_dentry) | |
622 | dentry = dget(req->r_dentry); /* we got spliced */ | |
623 | else | |
624 | dentry = NULL; | |
625 | return dentry; | |
626 | } | |
627 | ||
1d1de916 SW |
628 | static int is_root_ceph_dentry(struct inode *inode, struct dentry *dentry) |
629 | { | |
630 | return ceph_ino(inode) == CEPH_INO_ROOT && | |
631 | strncmp(dentry->d_name.name, ".ceph", 5) == 0; | |
632 | } | |
633 | ||
2817b000 SW |
634 | /* |
635 | * Look up a single dir entry. If there is a lookup intent, inform | |
636 | * the MDS so that it gets our 'caps wanted' value in a single op. | |
637 | */ | |
638 | static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry, | |
00cd8dd3 | 639 | unsigned int flags) |
2817b000 | 640 | { |
3d14c5d2 YS |
641 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
642 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
643 | struct ceph_mds_request *req; |
644 | int op; | |
315f2408 | 645 | int mask; |
2817b000 SW |
646 | int err; |
647 | ||
a455589f AV |
648 | dout("lookup %p dentry %p '%pd'\n", |
649 | dir, dentry, dentry); | |
2817b000 SW |
650 | |
651 | if (dentry->d_name.len > NAME_MAX) | |
652 | return ERR_PTR(-ENAMETOOLONG); | |
653 | ||
654 | err = ceph_init_dentry(dentry); | |
655 | if (err < 0) | |
656 | return ERR_PTR(err); | |
657 | ||
2817b000 | 658 | /* can we conclude ENOENT locally? */ |
2b0143b5 | 659 | if (d_really_is_negative(dentry)) { |
2817b000 SW |
660 | struct ceph_inode_info *ci = ceph_inode(dir); |
661 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
662 | ||
be655596 | 663 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
664 | dout(" dir %p flags are %d\n", dir, ci->i_ceph_flags); |
665 | if (strncmp(dentry->d_name.name, | |
3d14c5d2 | 666 | fsc->mount_options->snapdir_name, |
2817b000 | 667 | dentry->d_name.len) && |
1d1de916 | 668 | !is_root_ceph_dentry(dir, dentry) && |
e2c3de04 | 669 | ceph_test_mount_opt(fsc, DCACHE) && |
2f276c51 | 670 | __ceph_dir_is_complete(ci) && |
2817b000 | 671 | (__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) { |
be655596 | 672 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
673 | dout(" dir %p complete, -ENOENT\n", dir); |
674 | d_add(dentry, NULL); | |
675 | di->lease_shared_gen = ci->i_shared_gen; | |
676 | return NULL; | |
677 | } | |
be655596 | 678 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
679 | } |
680 | ||
681 | op = ceph_snap(dir) == CEPH_SNAPDIR ? | |
682 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; | |
683 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); | |
684 | if (IS_ERR(req)) | |
7e34bc52 | 685 | return ERR_CAST(req); |
2817b000 SW |
686 | req->r_dentry = dget(dentry); |
687 | req->r_num_caps = 2; | |
315f2408 YZ |
688 | |
689 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
690 | if (ceph_security_xattr_wanted(dir)) | |
691 | mask |= CEPH_CAP_XATTR_SHARED; | |
692 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
693 | ||
2817b000 SW |
694 | req->r_locked_dir = dir; |
695 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
468640e3 | 696 | err = ceph_handle_snapdir(req, dentry, err); |
2817b000 SW |
697 | dentry = ceph_finish_lookup(req, dentry, err); |
698 | ceph_mdsc_put_request(req); /* will dput(dentry) */ | |
699 | dout("lookup result=%p\n", dentry); | |
700 | return dentry; | |
701 | } | |
702 | ||
703 | /* | |
704 | * If we do a create but get no trace back from the MDS, follow up with | |
705 | * a lookup (the VFS expects us to link up the provided dentry). | |
706 | */ | |
707 | int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry) | |
708 | { | |
00cd8dd3 | 709 | struct dentry *result = ceph_lookup(dir, dentry, 0); |
2817b000 SW |
710 | |
711 | if (result && !IS_ERR(result)) { | |
712 | /* | |
713 | * We created the item, then did a lookup, and found | |
714 | * it was already linked to another inode we already | |
4d41cef2 YZ |
715 | * had in our cache (and thus got spliced). To not |
716 | * confuse VFS (especially when inode is a directory), | |
717 | * we don't link our dentry to that inode, return an | |
718 | * error instead. | |
719 | * | |
720 | * This event should be rare and it happens only when | |
721 | * we talk to old MDS. Recent MDS does not send traceless | |
722 | * reply for request that creates new inode. | |
2817b000 | 723 | */ |
5cba372c | 724 | d_drop(result); |
4d41cef2 | 725 | return -ESTALE; |
2817b000 SW |
726 | } |
727 | return PTR_ERR(result); | |
728 | } | |
729 | ||
730 | static int ceph_mknod(struct inode *dir, struct dentry *dentry, | |
1a67aafb | 731 | umode_t mode, dev_t rdev) |
2817b000 | 732 | { |
3d14c5d2 YS |
733 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
734 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 735 | struct ceph_mds_request *req; |
b1ee94aa | 736 | struct ceph_acls_info acls = {}; |
2817b000 SW |
737 | int err; |
738 | ||
739 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
740 | return -EROFS; | |
741 | ||
b1ee94aa YZ |
742 | err = ceph_pre_init_acls(dir, &mode, &acls); |
743 | if (err < 0) | |
744 | return err; | |
745 | ||
1a67aafb | 746 | dout("mknod in dir %p dentry %p mode 0%ho rdev %d\n", |
2817b000 SW |
747 | dir, dentry, mode, rdev); |
748 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS); | |
749 | if (IS_ERR(req)) { | |
b1ee94aa YZ |
750 | err = PTR_ERR(req); |
751 | goto out; | |
2817b000 SW |
752 | } |
753 | req->r_dentry = dget(dentry); | |
754 | req->r_num_caps = 2; | |
755 | req->r_locked_dir = dir; | |
756 | req->r_args.mknod.mode = cpu_to_le32(mode); | |
757 | req->r_args.mknod.rdev = cpu_to_le32(rdev); | |
758 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
759 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
b1ee94aa YZ |
760 | if (acls.pagelist) { |
761 | req->r_pagelist = acls.pagelist; | |
762 | acls.pagelist = NULL; | |
763 | } | |
2817b000 SW |
764 | err = ceph_mdsc_do_request(mdsc, dir, req); |
765 | if (!err && !req->r_reply_info.head->is_dentry) | |
766 | err = ceph_handle_notrace_create(dir, dentry); | |
767 | ceph_mdsc_put_request(req); | |
b1ee94aa | 768 | out: |
7221fe4c | 769 | if (!err) |
2b0143b5 | 770 | ceph_init_inode_acls(d_inode(dentry), &acls); |
b20a95a0 | 771 | else |
2817b000 | 772 | d_drop(dentry); |
b1ee94aa | 773 | ceph_release_acls_info(&acls); |
2817b000 SW |
774 | return err; |
775 | } | |
776 | ||
4acdaf27 | 777 | static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 778 | bool excl) |
2817b000 | 779 | { |
2d83bde9 | 780 | return ceph_mknod(dir, dentry, mode, 0); |
2817b000 SW |
781 | } |
782 | ||
783 | static int ceph_symlink(struct inode *dir, struct dentry *dentry, | |
784 | const char *dest) | |
785 | { | |
3d14c5d2 YS |
786 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
787 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
788 | struct ceph_mds_request *req; |
789 | int err; | |
790 | ||
791 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
792 | return -EROFS; | |
793 | ||
794 | dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest); | |
795 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS); | |
796 | if (IS_ERR(req)) { | |
b1ee94aa YZ |
797 | err = PTR_ERR(req); |
798 | goto out; | |
2817b000 | 799 | } |
687265e5 | 800 | req->r_path2 = kstrdup(dest, GFP_KERNEL); |
a149bb9a SK |
801 | if (!req->r_path2) { |
802 | err = -ENOMEM; | |
803 | ceph_mdsc_put_request(req); | |
804 | goto out; | |
805 | } | |
2817b000 | 806 | req->r_locked_dir = dir; |
a149bb9a SK |
807 | req->r_dentry = dget(dentry); |
808 | req->r_num_caps = 2; | |
2817b000 SW |
809 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
810 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
811 | err = ceph_mdsc_do_request(mdsc, dir, req); | |
812 | if (!err && !req->r_reply_info.head->is_dentry) | |
813 | err = ceph_handle_notrace_create(dir, dentry); | |
814 | ceph_mdsc_put_request(req); | |
b1ee94aa YZ |
815 | out: |
816 | if (err) | |
2817b000 SW |
817 | d_drop(dentry); |
818 | return err; | |
819 | } | |
820 | ||
18bb1db3 | 821 | static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
2817b000 | 822 | { |
3d14c5d2 YS |
823 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
824 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 825 | struct ceph_mds_request *req; |
b1ee94aa | 826 | struct ceph_acls_info acls = {}; |
2817b000 SW |
827 | int err = -EROFS; |
828 | int op; | |
829 | ||
830 | if (ceph_snap(dir) == CEPH_SNAPDIR) { | |
831 | /* mkdir .snap/foo is a MKSNAP */ | |
832 | op = CEPH_MDS_OP_MKSNAP; | |
a455589f AV |
833 | dout("mksnap dir %p snap '%pd' dn %p\n", dir, |
834 | dentry, dentry); | |
2817b000 | 835 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { |
18bb1db3 | 836 | dout("mkdir dir %p dn %p mode 0%ho\n", dir, dentry, mode); |
2817b000 SW |
837 | op = CEPH_MDS_OP_MKDIR; |
838 | } else { | |
839 | goto out; | |
840 | } | |
b1ee94aa YZ |
841 | |
842 | mode |= S_IFDIR; | |
843 | err = ceph_pre_init_acls(dir, &mode, &acls); | |
844 | if (err < 0) | |
845 | goto out; | |
846 | ||
2817b000 SW |
847 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
848 | if (IS_ERR(req)) { | |
849 | err = PTR_ERR(req); | |
850 | goto out; | |
851 | } | |
852 | ||
853 | req->r_dentry = dget(dentry); | |
854 | req->r_num_caps = 2; | |
855 | req->r_locked_dir = dir; | |
856 | req->r_args.mkdir.mode = cpu_to_le32(mode); | |
857 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
858 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
b1ee94aa YZ |
859 | if (acls.pagelist) { |
860 | req->r_pagelist = acls.pagelist; | |
861 | acls.pagelist = NULL; | |
862 | } | |
2817b000 | 863 | err = ceph_mdsc_do_request(mdsc, dir, req); |
275dd19e YZ |
864 | if (!err && |
865 | !req->r_reply_info.head->is_target && | |
866 | !req->r_reply_info.head->is_dentry) | |
2817b000 SW |
867 | err = ceph_handle_notrace_create(dir, dentry); |
868 | ceph_mdsc_put_request(req); | |
869 | out: | |
b20a95a0 | 870 | if (!err) |
2b0143b5 | 871 | ceph_init_inode_acls(d_inode(dentry), &acls); |
b20a95a0 | 872 | else |
2817b000 | 873 | d_drop(dentry); |
b1ee94aa | 874 | ceph_release_acls_info(&acls); |
2817b000 SW |
875 | return err; |
876 | } | |
877 | ||
878 | static int ceph_link(struct dentry *old_dentry, struct inode *dir, | |
879 | struct dentry *dentry) | |
880 | { | |
3d14c5d2 YS |
881 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
882 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
883 | struct ceph_mds_request *req; |
884 | int err; | |
885 | ||
886 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
887 | return -EROFS; | |
888 | ||
889 | dout("link in dir %p old_dentry %p dentry %p\n", dir, | |
890 | old_dentry, dentry); | |
891 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS); | |
892 | if (IS_ERR(req)) { | |
893 | d_drop(dentry); | |
894 | return PTR_ERR(req); | |
895 | } | |
896 | req->r_dentry = dget(dentry); | |
897 | req->r_num_caps = 2; | |
4b58c9b1 | 898 | req->r_old_dentry = dget(old_dentry); |
2817b000 SW |
899 | req->r_locked_dir = dir; |
900 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
901 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
ad88f23f YZ |
902 | /* release LINK_SHARED on source inode (mds will lock it) */ |
903 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; | |
2817b000 | 904 | err = ceph_mdsc_do_request(mdsc, dir, req); |
70b666c3 | 905 | if (err) { |
2817b000 | 906 | d_drop(dentry); |
70b666c3 | 907 | } else if (!req->r_reply_info.head->is_dentry) { |
2b0143b5 DH |
908 | ihold(d_inode(old_dentry)); |
909 | d_instantiate(dentry, d_inode(old_dentry)); | |
70b666c3 | 910 | } |
2817b000 SW |
911 | ceph_mdsc_put_request(req); |
912 | return err; | |
913 | } | |
914 | ||
915 | /* | |
916 | * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it | |
917 | * looks like the link count will hit 0, drop any other caps (other | |
918 | * than PIN) we don't specifically want (due to the file still being | |
919 | * open). | |
920 | */ | |
921 | static int drop_caps_for_unlink(struct inode *inode) | |
922 | { | |
923 | struct ceph_inode_info *ci = ceph_inode(inode); | |
924 | int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL; | |
925 | ||
be655596 | 926 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
927 | if (inode->i_nlink == 1) { |
928 | drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN); | |
929 | ci->i_ceph_flags |= CEPH_I_NODELAY; | |
930 | } | |
be655596 | 931 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
932 | return drop; |
933 | } | |
934 | ||
935 | /* | |
936 | * rmdir and unlink are differ only by the metadata op code | |
937 | */ | |
938 | static int ceph_unlink(struct inode *dir, struct dentry *dentry) | |
939 | { | |
3d14c5d2 YS |
940 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
941 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2b0143b5 | 942 | struct inode *inode = d_inode(dentry); |
2817b000 SW |
943 | struct ceph_mds_request *req; |
944 | int err = -EROFS; | |
945 | int op; | |
946 | ||
947 | if (ceph_snap(dir) == CEPH_SNAPDIR) { | |
948 | /* rmdir .snap/foo is RMSNAP */ | |
a455589f | 949 | dout("rmsnap dir %p '%pd' dn %p\n", dir, dentry, dentry); |
2817b000 SW |
950 | op = CEPH_MDS_OP_RMSNAP; |
951 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { | |
952 | dout("unlink/rmdir dir %p dn %p inode %p\n", | |
953 | dir, dentry, inode); | |
e36cb0b8 | 954 | op = d_is_dir(dentry) ? |
2817b000 SW |
955 | CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK; |
956 | } else | |
957 | goto out; | |
958 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); | |
959 | if (IS_ERR(req)) { | |
960 | err = PTR_ERR(req); | |
961 | goto out; | |
962 | } | |
963 | req->r_dentry = dget(dentry); | |
964 | req->r_num_caps = 2; | |
965 | req->r_locked_dir = dir; | |
966 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
967 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
968 | req->r_inode_drop = drop_caps_for_unlink(inode); | |
969 | err = ceph_mdsc_do_request(mdsc, dir, req); | |
970 | if (!err && !req->r_reply_info.head->is_dentry) | |
971 | d_delete(dentry); | |
972 | ceph_mdsc_put_request(req); | |
973 | out: | |
974 | return err; | |
975 | } | |
976 | ||
977 | static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry, | |
978 | struct inode *new_dir, struct dentry *new_dentry) | |
979 | { | |
3d14c5d2 YS |
980 | struct ceph_fs_client *fsc = ceph_sb_to_client(old_dir->i_sb); |
981 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 982 | struct ceph_mds_request *req; |
0ea611a3 | 983 | int op = CEPH_MDS_OP_RENAME; |
2817b000 SW |
984 | int err; |
985 | ||
986 | if (ceph_snap(old_dir) != ceph_snap(new_dir)) | |
987 | return -EXDEV; | |
0ea611a3 YZ |
988 | if (ceph_snap(old_dir) != CEPH_NOSNAP) { |
989 | if (old_dir == new_dir && ceph_snap(old_dir) == CEPH_SNAPDIR) | |
990 | op = CEPH_MDS_OP_RENAMESNAP; | |
991 | else | |
992 | return -EROFS; | |
993 | } | |
2817b000 SW |
994 | dout("rename dir %p dentry %p to dir %p dentry %p\n", |
995 | old_dir, old_dentry, new_dir, new_dentry); | |
0ea611a3 | 996 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
2817b000 SW |
997 | if (IS_ERR(req)) |
998 | return PTR_ERR(req); | |
180061a5 | 999 | ihold(old_dir); |
2817b000 SW |
1000 | req->r_dentry = dget(new_dentry); |
1001 | req->r_num_caps = 2; | |
1002 | req->r_old_dentry = dget(old_dentry); | |
180061a5 | 1003 | req->r_old_dentry_dir = old_dir; |
2817b000 SW |
1004 | req->r_locked_dir = new_dir; |
1005 | req->r_old_dentry_drop = CEPH_CAP_FILE_SHARED; | |
1006 | req->r_old_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1007 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
1008 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1009 | /* release LINK_RDCACHE on source inode (mds will lock it) */ | |
1010 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; | |
2b0143b5 DH |
1011 | if (d_really_is_positive(new_dentry)) |
1012 | req->r_inode_drop = drop_caps_for_unlink(d_inode(new_dentry)); | |
2817b000 SW |
1013 | err = ceph_mdsc_do_request(mdsc, old_dir, req); |
1014 | if (!err && !req->r_reply_info.head->is_dentry) { | |
1015 | /* | |
1016 | * Normally d_move() is done by fill_trace (called by | |
1017 | * do_request, above). If there is no trace, we need | |
1018 | * to do it here. | |
1019 | */ | |
ea1409f9 | 1020 | |
fdd4e158 YZ |
1021 | /* d_move screws up sibling dentries' offsets */ |
1022 | ceph_dir_clear_complete(old_dir); | |
1023 | ceph_dir_clear_complete(new_dir); | |
1024 | ||
2817b000 | 1025 | d_move(old_dentry, new_dentry); |
ea1409f9 SW |
1026 | |
1027 | /* ensure target dentry is invalidated, despite | |
1028 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d | 1029 | ceph_invalidate_dentry_lease(new_dentry); |
2817b000 SW |
1030 | } |
1031 | ceph_mdsc_put_request(req); | |
1032 | return err; | |
1033 | } | |
1034 | ||
81a6cf2d SW |
1035 | /* |
1036 | * Ensure a dentry lease will no longer revalidate. | |
1037 | */ | |
1038 | void ceph_invalidate_dentry_lease(struct dentry *dentry) | |
1039 | { | |
1040 | spin_lock(&dentry->d_lock); | |
1041 | dentry->d_time = jiffies; | |
1042 | ceph_dentry(dentry)->lease_shared_gen = 0; | |
1043 | spin_unlock(&dentry->d_lock); | |
1044 | } | |
2817b000 SW |
1045 | |
1046 | /* | |
1047 | * Check if dentry lease is valid. If not, delete the lease. Try to | |
1048 | * renew if the least is more than half up. | |
1049 | */ | |
1050 | static int dentry_lease_is_valid(struct dentry *dentry) | |
1051 | { | |
1052 | struct ceph_dentry_info *di; | |
1053 | struct ceph_mds_session *s; | |
1054 | int valid = 0; | |
1055 | u32 gen; | |
1056 | unsigned long ttl; | |
1057 | struct ceph_mds_session *session = NULL; | |
1058 | struct inode *dir = NULL; | |
1059 | u32 seq = 0; | |
1060 | ||
1061 | spin_lock(&dentry->d_lock); | |
1062 | di = ceph_dentry(dentry); | |
3d8eb7a9 | 1063 | if (di->lease_session) { |
2817b000 | 1064 | s = di->lease_session; |
d8fb02ab | 1065 | spin_lock(&s->s_gen_ttl_lock); |
2817b000 SW |
1066 | gen = s->s_cap_gen; |
1067 | ttl = s->s_cap_ttl; | |
d8fb02ab | 1068 | spin_unlock(&s->s_gen_ttl_lock); |
2817b000 SW |
1069 | |
1070 | if (di->lease_gen == gen && | |
1071 | time_before(jiffies, dentry->d_time) && | |
1072 | time_before(jiffies, ttl)) { | |
1073 | valid = 1; | |
1074 | if (di->lease_renew_after && | |
1075 | time_after(jiffies, di->lease_renew_after)) { | |
1076 | /* we should renew */ | |
2b0143b5 | 1077 | dir = d_inode(dentry->d_parent); |
2817b000 SW |
1078 | session = ceph_get_mds_session(s); |
1079 | seq = di->lease_seq; | |
1080 | di->lease_renew_after = 0; | |
1081 | di->lease_renew_from = jiffies; | |
1082 | } | |
2817b000 SW |
1083 | } |
1084 | } | |
1085 | spin_unlock(&dentry->d_lock); | |
1086 | ||
1087 | if (session) { | |
1088 | ceph_mdsc_lease_send_msg(session, dir, dentry, | |
1089 | CEPH_MDS_LEASE_RENEW, seq); | |
1090 | ceph_put_mds_session(session); | |
1091 | } | |
1092 | dout("dentry_lease_is_valid - dentry %p = %d\n", dentry, valid); | |
1093 | return valid; | |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * Check if directory-wide content lease/cap is valid. | |
1098 | */ | |
1099 | static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry) | |
1100 | { | |
1101 | struct ceph_inode_info *ci = ceph_inode(dir); | |
1102 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
1103 | int valid = 0; | |
1104 | ||
be655596 | 1105 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
1106 | if (ci->i_shared_gen == di->lease_shared_gen) |
1107 | valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1); | |
be655596 | 1108 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
1109 | dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n", |
1110 | dir, (unsigned)ci->i_shared_gen, dentry, | |
1111 | (unsigned)di->lease_shared_gen, valid); | |
1112 | return valid; | |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * Check if cached dentry can be trusted. | |
1117 | */ | |
0b728e19 | 1118 | static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags) |
2817b000 | 1119 | { |
bf1c6aca | 1120 | int valid = 0; |
641235d8 | 1121 | struct dentry *parent; |
34286d66 NP |
1122 | struct inode *dir; |
1123 | ||
0b728e19 | 1124 | if (flags & LOOKUP_RCU) |
34286d66 NP |
1125 | return -ECHILD; |
1126 | ||
a455589f | 1127 | dout("d_revalidate %p '%pd' inode %p offset %lld\n", dentry, |
2b0143b5 | 1128 | dentry, d_inode(dentry), ceph_dentry(dentry)->offset); |
2817b000 | 1129 | |
641235d8 YZ |
1130 | parent = dget_parent(dentry); |
1131 | dir = d_inode(parent); | |
bf1c6aca | 1132 | |
2817b000 SW |
1133 | /* always trust cached snapped dentries, snapdir dentry */ |
1134 | if (ceph_snap(dir) != CEPH_NOSNAP) { | |
a455589f | 1135 | dout("d_revalidate %p '%pd' inode %p is SNAPPED\n", dentry, |
2b0143b5 | 1136 | dentry, d_inode(dentry)); |
bf1c6aca | 1137 | valid = 1; |
2b0143b5 DH |
1138 | } else if (d_really_is_positive(dentry) && |
1139 | ceph_snap(d_inode(dentry)) == CEPH_SNAPDIR) { | |
bf1c6aca SW |
1140 | valid = 1; |
1141 | } else if (dentry_lease_is_valid(dentry) || | |
1142 | dir_lease_is_valid(dir, dentry)) { | |
2b0143b5 DH |
1143 | if (d_really_is_positive(dentry)) |
1144 | valid = ceph_is_any_caps(d_inode(dentry)); | |
9215aeea YZ |
1145 | else |
1146 | valid = 1; | |
2817b000 | 1147 | } |
2817b000 | 1148 | |
200fd27c YZ |
1149 | if (!valid) { |
1150 | struct ceph_mds_client *mdsc = | |
1151 | ceph_sb_to_client(dir->i_sb)->mdsc; | |
1152 | struct ceph_mds_request *req; | |
1153 | int op, mask, err; | |
1154 | ||
1155 | op = ceph_snap(dir) == CEPH_SNAPDIR ? | |
1156 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; | |
1157 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); | |
1158 | if (!IS_ERR(req)) { | |
1159 | req->r_dentry = dget(dentry); | |
1160 | req->r_num_caps = 2; | |
1161 | ||
1162 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
1163 | if (ceph_security_xattr_wanted(dir)) | |
1164 | mask |= CEPH_CAP_XATTR_SHARED; | |
1165 | req->r_args.getattr.mask = mask; | |
1166 | ||
1167 | req->r_locked_dir = dir; | |
1168 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
1169 | if (err == 0 || err == -ENOENT) { | |
1170 | if (dentry == req->r_dentry) { | |
1171 | valid = !d_unhashed(dentry); | |
1172 | } else { | |
1173 | d_invalidate(req->r_dentry); | |
1174 | err = -EAGAIN; | |
1175 | } | |
1176 | } | |
1177 | ceph_mdsc_put_request(req); | |
1178 | dout("d_revalidate %p lookup result=%d\n", | |
1179 | dentry, err); | |
1180 | } | |
1181 | } | |
1182 | ||
bf1c6aca | 1183 | dout("d_revalidate %p %s\n", dentry, valid ? "valid" : "invalid"); |
9215aeea | 1184 | if (valid) { |
bf1c6aca | 1185 | ceph_dentry_lru_touch(dentry); |
9215aeea YZ |
1186 | } else { |
1187 | ceph_dir_clear_complete(dir); | |
9215aeea | 1188 | } |
641235d8 YZ |
1189 | |
1190 | dput(parent); | |
bf1c6aca | 1191 | return valid; |
2817b000 SW |
1192 | } |
1193 | ||
1194 | /* | |
147851d2 | 1195 | * Release our ceph_dentry_info. |
2817b000 | 1196 | */ |
147851d2 | 1197 | static void ceph_d_release(struct dentry *dentry) |
2817b000 SW |
1198 | { |
1199 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
2817b000 | 1200 | |
147851d2 | 1201 | dout("d_release %p\n", dentry); |
3d8eb7a9 SW |
1202 | ceph_dentry_lru_del(dentry); |
1203 | if (di->lease_session) | |
1204 | ceph_put_mds_session(di->lease_session); | |
1205 | kmem_cache_free(ceph_dentry_cachep, di); | |
1206 | dentry->d_fsdata = NULL; | |
2817b000 SW |
1207 | } |
1208 | ||
1209 | static int ceph_snapdir_d_revalidate(struct dentry *dentry, | |
0b728e19 | 1210 | unsigned int flags) |
2817b000 SW |
1211 | { |
1212 | /* | |
1213 | * Eventually, we'll want to revalidate snapped metadata | |
1214 | * too... probably... | |
1215 | */ | |
1216 | return 1; | |
1217 | } | |
1218 | ||
b58dc410 SW |
1219 | /* |
1220 | * When the VFS prunes a dentry from the cache, we need to clear the | |
1221 | * complete flag on the parent directory. | |
1222 | * | |
1223 | * Called under dentry->d_lock. | |
1224 | */ | |
1225 | static void ceph_d_prune(struct dentry *dentry) | |
1226 | { | |
774ac21d | 1227 | dout("ceph_d_prune %p\n", dentry); |
b58dc410 SW |
1228 | |
1229 | /* do we have a valid parent? */ | |
8842b3be | 1230 | if (IS_ROOT(dentry)) |
b58dc410 SW |
1231 | return; |
1232 | ||
2f276c51 | 1233 | /* if we are not hashed, we don't affect dir's completeness */ |
b58dc410 SW |
1234 | if (d_unhashed(dentry)) |
1235 | return; | |
2817b000 | 1236 | |
b58dc410 SW |
1237 | /* |
1238 | * we hold d_lock, so d_parent is stable, and d_fsdata is never | |
1239 | * cleared until d_release | |
1240 | */ | |
2b0143b5 | 1241 | ceph_dir_clear_complete(d_inode(dentry->d_parent)); |
b58dc410 | 1242 | } |
2817b000 SW |
1243 | |
1244 | /* | |
1245 | * read() on a dir. This weird interface hack only works if mounted | |
1246 | * with '-o dirstat'. | |
1247 | */ | |
1248 | static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, | |
1249 | loff_t *ppos) | |
1250 | { | |
1251 | struct ceph_file_info *cf = file->private_data; | |
496ad9aa | 1252 | struct inode *inode = file_inode(file); |
2817b000 SW |
1253 | struct ceph_inode_info *ci = ceph_inode(inode); |
1254 | int left; | |
ae598083 | 1255 | const int bufsize = 1024; |
2817b000 | 1256 | |
3d14c5d2 | 1257 | if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT)) |
2817b000 SW |
1258 | return -EISDIR; |
1259 | ||
1260 | if (!cf->dir_info) { | |
687265e5 | 1261 | cf->dir_info = kmalloc(bufsize, GFP_KERNEL); |
2817b000 SW |
1262 | if (!cf->dir_info) |
1263 | return -ENOMEM; | |
1264 | cf->dir_info_len = | |
ae598083 | 1265 | snprintf(cf->dir_info, bufsize, |
2817b000 SW |
1266 | "entries: %20lld\n" |
1267 | " files: %20lld\n" | |
1268 | " subdirs: %20lld\n" | |
1269 | "rentries: %20lld\n" | |
1270 | " rfiles: %20lld\n" | |
1271 | " rsubdirs: %20lld\n" | |
1272 | "rbytes: %20lld\n" | |
1273 | "rctime: %10ld.%09ld\n", | |
1274 | ci->i_files + ci->i_subdirs, | |
1275 | ci->i_files, | |
1276 | ci->i_subdirs, | |
1277 | ci->i_rfiles + ci->i_rsubdirs, | |
1278 | ci->i_rfiles, | |
1279 | ci->i_rsubdirs, | |
1280 | ci->i_rbytes, | |
1281 | (long)ci->i_rctime.tv_sec, | |
1282 | (long)ci->i_rctime.tv_nsec); | |
1283 | } | |
1284 | ||
1285 | if (*ppos >= cf->dir_info_len) | |
1286 | return 0; | |
1287 | size = min_t(unsigned, size, cf->dir_info_len-*ppos); | |
1288 | left = copy_to_user(buf, cf->dir_info + *ppos, size); | |
1289 | if (left == size) | |
1290 | return -EFAULT; | |
1291 | *ppos += (size - left); | |
1292 | return size - left; | |
1293 | } | |
1294 | ||
2817b000 SW |
1295 | /* |
1296 | * We maintain a private dentry LRU. | |
1297 | * | |
1298 | * FIXME: this needs to be changed to a per-mds lru to be useful. | |
1299 | */ | |
1300 | void ceph_dentry_lru_add(struct dentry *dn) | |
1301 | { | |
1302 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1303 | struct ceph_mds_client *mdsc; | |
2817b000 | 1304 | |
a455589f | 1305 | dout("dentry_lru_add %p %p '%pd'\n", di, dn, dn); |
3d8eb7a9 SW |
1306 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1307 | spin_lock(&mdsc->dentry_lru_lock); | |
1308 | list_add_tail(&di->lru, &mdsc->dentry_lru); | |
1309 | mdsc->num_dentry++; | |
1310 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1311 | } |
1312 | ||
1313 | void ceph_dentry_lru_touch(struct dentry *dn) | |
1314 | { | |
1315 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1316 | struct ceph_mds_client *mdsc; | |
2817b000 | 1317 | |
a455589f AV |
1318 | dout("dentry_lru_touch %p %p '%pd' (offset %lld)\n", di, dn, dn, |
1319 | di->offset); | |
3d8eb7a9 SW |
1320 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1321 | spin_lock(&mdsc->dentry_lru_lock); | |
1322 | list_move_tail(&di->lru, &mdsc->dentry_lru); | |
1323 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1324 | } |
1325 | ||
1326 | void ceph_dentry_lru_del(struct dentry *dn) | |
1327 | { | |
1328 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1329 | struct ceph_mds_client *mdsc; | |
1330 | ||
a455589f | 1331 | dout("dentry_lru_del %p %p '%pd'\n", di, dn, dn); |
3d8eb7a9 SW |
1332 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1333 | spin_lock(&mdsc->dentry_lru_lock); | |
1334 | list_del_init(&di->lru); | |
1335 | mdsc->num_dentry--; | |
1336 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1337 | } |
1338 | ||
6c0f3af7 SW |
1339 | /* |
1340 | * Return name hash for a given dentry. This is dependent on | |
1341 | * the parent directory's hash function. | |
1342 | */ | |
e5f86dc3 | 1343 | unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn) |
6c0f3af7 | 1344 | { |
6c0f3af7 SW |
1345 | struct ceph_inode_info *dci = ceph_inode(dir); |
1346 | ||
1347 | switch (dci->i_dir_layout.dl_dir_hash) { | |
1348 | case 0: /* for backward compat */ | |
1349 | case CEPH_STR_HASH_LINUX: | |
1350 | return dn->d_name.hash; | |
1351 | ||
1352 | default: | |
1353 | return ceph_str_hash(dci->i_dir_layout.dl_dir_hash, | |
1354 | dn->d_name.name, dn->d_name.len); | |
1355 | } | |
1356 | } | |
1357 | ||
2817b000 SW |
1358 | const struct file_operations ceph_dir_fops = { |
1359 | .read = ceph_read_dir, | |
77acfa29 | 1360 | .iterate = ceph_readdir, |
2817b000 SW |
1361 | .llseek = ceph_dir_llseek, |
1362 | .open = ceph_open, | |
1363 | .release = ceph_release, | |
1364 | .unlocked_ioctl = ceph_ioctl, | |
da819c81 | 1365 | .fsync = ceph_fsync, |
2817b000 SW |
1366 | }; |
1367 | ||
38c48b5f YZ |
1368 | const struct file_operations ceph_snapdir_fops = { |
1369 | .iterate = ceph_readdir, | |
1370 | .llseek = ceph_dir_llseek, | |
1371 | .open = ceph_open, | |
1372 | .release = ceph_release, | |
1373 | }; | |
1374 | ||
2817b000 SW |
1375 | const struct inode_operations ceph_dir_iops = { |
1376 | .lookup = ceph_lookup, | |
1377 | .permission = ceph_permission, | |
1378 | .getattr = ceph_getattr, | |
1379 | .setattr = ceph_setattr, | |
1380 | .setxattr = ceph_setxattr, | |
1381 | .getxattr = ceph_getxattr, | |
1382 | .listxattr = ceph_listxattr, | |
1383 | .removexattr = ceph_removexattr, | |
7221fe4c | 1384 | .get_acl = ceph_get_acl, |
72466d0b | 1385 | .set_acl = ceph_set_acl, |
2817b000 SW |
1386 | .mknod = ceph_mknod, |
1387 | .symlink = ceph_symlink, | |
1388 | .mkdir = ceph_mkdir, | |
1389 | .link = ceph_link, | |
1390 | .unlink = ceph_unlink, | |
1391 | .rmdir = ceph_unlink, | |
1392 | .rename = ceph_rename, | |
1393 | .create = ceph_create, | |
2d83bde9 | 1394 | .atomic_open = ceph_atomic_open, |
2817b000 SW |
1395 | }; |
1396 | ||
38c48b5f YZ |
1397 | const struct inode_operations ceph_snapdir_iops = { |
1398 | .lookup = ceph_lookup, | |
1399 | .permission = ceph_permission, | |
1400 | .getattr = ceph_getattr, | |
1401 | .mkdir = ceph_mkdir, | |
1402 | .rmdir = ceph_unlink, | |
0ea611a3 | 1403 | .rename = ceph_rename, |
38c48b5f YZ |
1404 | }; |
1405 | ||
52dfb8ac | 1406 | const struct dentry_operations ceph_dentry_ops = { |
2817b000 | 1407 | .d_revalidate = ceph_d_revalidate, |
147851d2 | 1408 | .d_release = ceph_d_release, |
b58dc410 | 1409 | .d_prune = ceph_d_prune, |
2817b000 SW |
1410 | }; |
1411 | ||
52dfb8ac | 1412 | const struct dentry_operations ceph_snapdir_dentry_ops = { |
2817b000 | 1413 | .d_revalidate = ceph_snapdir_d_revalidate, |
147851d2 | 1414 | .d_release = ceph_d_release, |
2817b000 SW |
1415 | }; |
1416 | ||
52dfb8ac | 1417 | const struct dentry_operations ceph_snap_dentry_ops = { |
147851d2 | 1418 | .d_release = ceph_d_release, |
b58dc410 | 1419 | .d_prune = ceph_d_prune, |
2817b000 | 1420 | }; |