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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 | 71 | /* |
f3c4ebe6 YZ |
72 | * for f_pos for readdir: |
73 | * - hash order: | |
74 | * (0xff << 52) | ((24 bits hash) << 28) | | |
75 | * (the nth entry has hash collision); | |
76 | * - frag+name order; | |
77 | * ((frag value) << 28) | (the nth entry in frag); | |
2817b000 | 78 | */ |
f3c4ebe6 YZ |
79 | #define OFFSET_BITS 28 |
80 | #define OFFSET_MASK ((1 << OFFSET_BITS) - 1) | |
81 | #define HASH_ORDER (0xffull << (OFFSET_BITS + 24)) | |
82 | loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order) | |
83 | { | |
84 | loff_t fpos = ((loff_t)high << 28) | (loff_t)off; | |
85 | if (hash_order) | |
86 | fpos |= HASH_ORDER; | |
87 | return fpos; | |
88 | } | |
89 | ||
90 | static bool is_hash_order(loff_t p) | |
91 | { | |
92 | return (p & HASH_ORDER) == HASH_ORDER; | |
93 | } | |
94 | ||
2817b000 SW |
95 | static unsigned fpos_frag(loff_t p) |
96 | { | |
f3c4ebe6 | 97 | return p >> OFFSET_BITS; |
2817b000 | 98 | } |
f3c4ebe6 YZ |
99 | |
100 | static unsigned fpos_hash(loff_t p) | |
101 | { | |
102 | return ceph_frag_value(fpos_frag(p)); | |
103 | } | |
104 | ||
2817b000 SW |
105 | static unsigned fpos_off(loff_t p) |
106 | { | |
f3c4ebe6 | 107 | return p & OFFSET_MASK; |
2817b000 SW |
108 | } |
109 | ||
4d5f5df6 YZ |
110 | static int fpos_cmp(loff_t l, loff_t r) |
111 | { | |
112 | int v = ceph_frag_compare(fpos_frag(l), fpos_frag(r)); | |
113 | if (v) | |
114 | return v; | |
115 | return (int)(fpos_off(l) - fpos_off(r)); | |
116 | } | |
117 | ||
fdd4e158 YZ |
118 | /* |
119 | * make note of the last dentry we read, so we can | |
120 | * continue at the same lexicographical point, | |
121 | * regardless of what dir changes take place on the | |
122 | * server. | |
123 | */ | |
124 | static int note_last_dentry(struct ceph_file_info *fi, const char *name, | |
125 | int len, unsigned next_offset) | |
126 | { | |
127 | char *buf = kmalloc(len+1, GFP_KERNEL); | |
128 | if (!buf) | |
129 | return -ENOMEM; | |
130 | kfree(fi->last_name); | |
131 | fi->last_name = buf; | |
132 | memcpy(fi->last_name, name, len); | |
133 | fi->last_name[len] = 0; | |
134 | fi->next_offset = next_offset; | |
135 | dout("note_last_dentry '%s'\n", fi->last_name); | |
136 | return 0; | |
137 | } | |
138 | ||
c530cd24 YZ |
139 | |
140 | static struct dentry * | |
141 | __dcache_find_get_entry(struct dentry *parent, u64 idx, | |
142 | struct ceph_readdir_cache_control *cache_ctl) | |
143 | { | |
144 | struct inode *dir = d_inode(parent); | |
145 | struct dentry *dentry; | |
146 | unsigned idx_mask = (PAGE_SIZE / sizeof(struct dentry *)) - 1; | |
147 | loff_t ptr_pos = idx * sizeof(struct dentry *); | |
148 | pgoff_t ptr_pgoff = ptr_pos >> PAGE_SHIFT; | |
149 | ||
150 | if (ptr_pos >= i_size_read(dir)) | |
151 | return NULL; | |
152 | ||
153 | if (!cache_ctl->page || ptr_pgoff != page_index(cache_ctl->page)) { | |
154 | ceph_readdir_cache_release(cache_ctl); | |
155 | cache_ctl->page = find_lock_page(&dir->i_data, ptr_pgoff); | |
156 | if (!cache_ctl->page) { | |
157 | dout(" page %lu not found\n", ptr_pgoff); | |
158 | return ERR_PTR(-EAGAIN); | |
159 | } | |
160 | /* reading/filling the cache are serialized by | |
161 | i_mutex, no need to use page lock */ | |
162 | unlock_page(cache_ctl->page); | |
163 | cache_ctl->dentries = kmap(cache_ctl->page); | |
164 | } | |
165 | ||
166 | cache_ctl->index = idx & idx_mask; | |
167 | ||
168 | rcu_read_lock(); | |
169 | spin_lock(&parent->d_lock); | |
170 | /* check i_size again here, because empty directory can be | |
171 | * marked as complete while not holding the i_mutex. */ | |
172 | if (ceph_dir_is_complete_ordered(dir) && ptr_pos < i_size_read(dir)) | |
173 | dentry = cache_ctl->dentries[cache_ctl->index]; | |
174 | else | |
175 | dentry = NULL; | |
176 | spin_unlock(&parent->d_lock); | |
177 | if (dentry && !lockref_get_not_dead(&dentry->d_lockref)) | |
178 | dentry = NULL; | |
179 | rcu_read_unlock(); | |
180 | return dentry ? : ERR_PTR(-EAGAIN); | |
181 | } | |
182 | ||
2817b000 SW |
183 | /* |
184 | * When possible, we try to satisfy a readdir by peeking at the | |
185 | * dcache. We make this work by carefully ordering dentries on | |
946e51f2 | 186 | * d_child when we initially get results back from the MDS, and |
2817b000 SW |
187 | * falling back to a "normal" sync readdir if any dentries in the dir |
188 | * are dropped. | |
189 | * | |
2f276c51 | 190 | * Complete dir indicates that we have all dentries in the dir. It is |
2817b000 SW |
191 | * defined IFF we hold CEPH_CAP_FILE_SHARED (which will be revoked by |
192 | * the MDS if/when the directory is modified). | |
193 | */ | |
a30be7cb YZ |
194 | static int __dcache_readdir(struct file *file, struct dir_context *ctx, |
195 | u32 shared_gen) | |
2817b000 | 196 | { |
77acfa29 | 197 | struct ceph_file_info *fi = file->private_data; |
b583043e | 198 | struct dentry *parent = file->f_path.dentry; |
2b0143b5 | 199 | struct inode *dir = d_inode(parent); |
fdd4e158 | 200 | struct dentry *dentry, *last = NULL; |
2817b000 | 201 | struct ceph_dentry_info *di; |
fdd4e158 | 202 | struct ceph_readdir_cache_control cache_ctl = {}; |
c530cd24 YZ |
203 | u64 idx = 0; |
204 | int err = 0; | |
2817b000 | 205 | |
f3c4ebe6 | 206 | dout("__dcache_readdir %p v%u at %llx\n", dir, shared_gen, ctx->pos); |
2817b000 | 207 | |
c530cd24 YZ |
208 | /* search start position */ |
209 | if (ctx->pos > 2) { | |
210 | u64 count = div_u64(i_size_read(dir), sizeof(struct dentry *)); | |
211 | while (count > 0) { | |
212 | u64 step = count >> 1; | |
213 | dentry = __dcache_find_get_entry(parent, idx + step, | |
214 | &cache_ctl); | |
215 | if (!dentry) { | |
216 | /* use linar search */ | |
217 | idx = 0; | |
218 | break; | |
219 | } | |
220 | if (IS_ERR(dentry)) { | |
221 | err = PTR_ERR(dentry); | |
222 | goto out; | |
223 | } | |
224 | di = ceph_dentry(dentry); | |
225 | spin_lock(&dentry->d_lock); | |
226 | if (fpos_cmp(di->offset, ctx->pos) < 0) { | |
227 | idx += step + 1; | |
228 | count -= step + 1; | |
229 | } else { | |
230 | count = step; | |
231 | } | |
232 | spin_unlock(&dentry->d_lock); | |
233 | dput(dentry); | |
234 | } | |
235 | ||
236 | dout("__dcache_readdir %p cache idx %llu\n", dir, idx); | |
2817b000 SW |
237 | } |
238 | ||
fdd4e158 | 239 | |
c530cd24 YZ |
240 | for (;;) { |
241 | bool emit_dentry = false; | |
242 | dentry = __dcache_find_get_entry(parent, idx++, &cache_ctl); | |
243 | if (!dentry) { | |
9cfa1098 | 244 | fi->flags |= CEPH_F_ATEND; |
fdd4e158 YZ |
245 | err = 0; |
246 | break; | |
2817b000 | 247 | } |
c530cd24 YZ |
248 | if (IS_ERR(dentry)) { |
249 | err = PTR_ERR(dentry); | |
250 | goto out; | |
fdd4e158 YZ |
251 | } |
252 | ||
fdd4e158 YZ |
253 | di = ceph_dentry(dentry); |
254 | spin_lock(&dentry->d_lock); | |
a30be7cb | 255 | if (di->lease_shared_gen == shared_gen && |
fdd4e158 | 256 | d_really_is_positive(dentry) && |
fdd4e158 YZ |
257 | fpos_cmp(ctx->pos, di->offset) <= 0) { |
258 | emit_dentry = true; | |
259 | } | |
da502956 | 260 | spin_unlock(&dentry->d_lock); |
2817b000 | 261 | |
fdd4e158 | 262 | if (emit_dentry) { |
f3c4ebe6 | 263 | dout(" %llx dentry %p %pd %p\n", di->offset, |
fdd4e158 YZ |
264 | dentry, dentry, d_inode(dentry)); |
265 | ctx->pos = di->offset; | |
266 | if (!dir_emit(ctx, dentry->d_name.name, | |
267 | dentry->d_name.len, | |
268 | ceph_translate_ino(dentry->d_sb, | |
269 | d_inode(dentry)->i_ino), | |
270 | d_inode(dentry)->i_mode >> 12)) { | |
271 | dput(dentry); | |
272 | err = 0; | |
273 | break; | |
274 | } | |
275 | ctx->pos++; | |
0081bd83 | 276 | |
fdd4e158 YZ |
277 | if (last) |
278 | dput(last); | |
279 | last = dentry; | |
280 | } else { | |
281 | dput(dentry); | |
2817b000 | 282 | } |
fdd4e158 | 283 | } |
c530cd24 | 284 | out: |
fdd4e158 YZ |
285 | ceph_readdir_cache_release(&cache_ctl); |
286 | if (last) { | |
287 | int ret; | |
288 | di = ceph_dentry(last); | |
289 | ret = note_last_dentry(fi, last->d_name.name, last->d_name.len, | |
290 | fpos_off(di->offset) + 1); | |
291 | if (ret < 0) | |
292 | err = ret; | |
2817b000 | 293 | dput(last); |
fdd4e158 | 294 | } |
2817b000 SW |
295 | return err; |
296 | } | |
297 | ||
f3c4ebe6 YZ |
298 | static bool need_send_readdir(struct ceph_file_info *fi, loff_t pos) |
299 | { | |
300 | if (!fi->last_readdir) | |
301 | return true; | |
302 | if (is_hash_order(pos)) | |
303 | return !ceph_frag_contains_value(fi->frag, fpos_hash(pos)); | |
304 | else | |
305 | return fi->frag != fpos_frag(pos); | |
306 | } | |
307 | ||
77acfa29 | 308 | static int ceph_readdir(struct file *file, struct dir_context *ctx) |
2817b000 | 309 | { |
77acfa29 AV |
310 | struct ceph_file_info *fi = file->private_data; |
311 | struct inode *inode = file_inode(file); | |
2817b000 | 312 | struct ceph_inode_info *ci = ceph_inode(inode); |
3d14c5d2 YS |
313 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
314 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
8974eebd | 315 | int i; |
2817b000 SW |
316 | int err; |
317 | u32 ftype; | |
318 | struct ceph_mds_reply_info_parsed *rinfo; | |
2817b000 | 319 | |
8974eebd | 320 | dout("readdir %p file %p pos %llx\n", inode, file, ctx->pos); |
9cfa1098 | 321 | if (fi->flags & CEPH_F_ATEND) |
2817b000 SW |
322 | return 0; |
323 | ||
324 | /* always start with . and .. */ | |
77acfa29 | 325 | if (ctx->pos == 0) { |
2817b000 | 326 | dout("readdir off 0 -> '.'\n"); |
77acfa29 | 327 | if (!dir_emit(ctx, ".", 1, |
ad1fee96 | 328 | ceph_translate_ino(inode->i_sb, inode->i_ino), |
77acfa29 | 329 | inode->i_mode >> 12)) |
2817b000 | 330 | return 0; |
77acfa29 | 331 | ctx->pos = 1; |
2817b000 | 332 | } |
77acfa29 | 333 | if (ctx->pos == 1) { |
b583043e | 334 | ino_t ino = parent_ino(file->f_path.dentry); |
2817b000 | 335 | dout("readdir off 1 -> '..'\n"); |
77acfa29 | 336 | if (!dir_emit(ctx, "..", 2, |
ad1fee96 | 337 | ceph_translate_ino(inode->i_sb, ino), |
77acfa29 | 338 | inode->i_mode >> 12)) |
2817b000 | 339 | return 0; |
77acfa29 | 340 | ctx->pos = 2; |
2817b000 SW |
341 | } |
342 | ||
343 | /* can we use the dcache? */ | |
be655596 | 344 | spin_lock(&ci->i_ceph_lock); |
fdd4e158 | 345 | if (ceph_test_mount_opt(fsc, DCACHE) && |
3d14c5d2 | 346 | !ceph_test_mount_opt(fsc, NOASYNCREADDIR) && |
a0dff78d | 347 | ceph_snap(inode) != CEPH_SNAPDIR && |
70db4f36 | 348 | __ceph_dir_is_complete_ordered(ci) && |
2817b000 | 349 | __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) { |
a30be7cb | 350 | u32 shared_gen = ci->i_shared_gen; |
be655596 | 351 | spin_unlock(&ci->i_ceph_lock); |
a30be7cb | 352 | err = __dcache_readdir(file, ctx, shared_gen); |
efa4c120 | 353 | if (err != -EAGAIN) |
2817b000 | 354 | return err; |
efa4c120 | 355 | } else { |
be655596 | 356 | spin_unlock(&ci->i_ceph_lock); |
2817b000 | 357 | } |
2817b000 SW |
358 | |
359 | /* proceed with a normal readdir */ | |
2817b000 SW |
360 | more: |
361 | /* do we have the correct frag content buffered? */ | |
f3c4ebe6 | 362 | if (need_send_readdir(fi, ctx->pos)) { |
2817b000 | 363 | struct ceph_mds_request *req; |
f3c4ebe6 | 364 | unsigned frag; |
2817b000 SW |
365 | int op = ceph_snap(inode) == CEPH_SNAPDIR ? |
366 | CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR; | |
367 | ||
368 | /* discard old result, if any */ | |
393f6620 | 369 | if (fi->last_readdir) { |
2817b000 | 370 | ceph_mdsc_put_request(fi->last_readdir); |
393f6620 SW |
371 | fi->last_readdir = NULL; |
372 | } | |
2817b000 | 373 | |
f3c4ebe6 YZ |
374 | if (is_hash_order(ctx->pos)) { |
375 | frag = ceph_choose_frag(ci, fpos_hash(ctx->pos), | |
376 | NULL, NULL); | |
377 | } else { | |
378 | frag = fpos_frag(ctx->pos); | |
379 | } | |
380 | ||
2817b000 SW |
381 | dout("readdir fetching %llx.%llx frag %x offset '%s'\n", |
382 | ceph_vinop(inode), frag, fi->last_name); | |
383 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); | |
384 | if (IS_ERR(req)) | |
385 | return PTR_ERR(req); | |
54008399 YZ |
386 | err = ceph_alloc_readdir_reply_buffer(req, inode); |
387 | if (err) { | |
388 | ceph_mdsc_put_request(req); | |
389 | return err; | |
390 | } | |
2817b000 SW |
391 | /* hints to request -> mds selection code */ |
392 | req->r_direct_mode = USE_AUTH_MDS; | |
393 | req->r_direct_hash = ceph_frag_value(frag); | |
394 | req->r_direct_is_hash = true; | |
a149bb9a | 395 | if (fi->last_name) { |
687265e5 | 396 | req->r_path2 = kstrdup(fi->last_name, GFP_KERNEL); |
a149bb9a SK |
397 | if (!req->r_path2) { |
398 | ceph_mdsc_put_request(req); | |
399 | return -ENOMEM; | |
400 | } | |
401 | } | |
fdd4e158 YZ |
402 | req->r_dir_release_cnt = fi->dir_release_count; |
403 | req->r_dir_ordered_cnt = fi->dir_ordered_count; | |
404 | req->r_readdir_cache_idx = fi->readdir_cache_idx; | |
2817b000 SW |
405 | req->r_readdir_offset = fi->next_offset; |
406 | req->r_args.readdir.frag = cpu_to_le32(frag); | |
956d39d6 YZ |
407 | req->r_args.readdir.flags = |
408 | cpu_to_le16(CEPH_READDIR_REPLY_BITFLAGS); | |
a149bb9a SK |
409 | |
410 | req->r_inode = inode; | |
411 | ihold(inode); | |
412 | req->r_dentry = dget(file->f_path.dentry); | |
2817b000 SW |
413 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
414 | if (err < 0) { | |
415 | ceph_mdsc_put_request(req); | |
416 | return err; | |
417 | } | |
f3c4ebe6 YZ |
418 | dout("readdir got and parsed readdir result=%d on " |
419 | "frag %x, end=%d, complete=%d, hash_order=%d\n", | |
420 | err, frag, | |
2817b000 | 421 | (int)req->r_reply_info.dir_end, |
f3c4ebe6 YZ |
422 | (int)req->r_reply_info.dir_complete, |
423 | (int)req->r_reply_info.hash_order); | |
2817b000 | 424 | |
81c6aea5 YZ |
425 | rinfo = &req->r_reply_info; |
426 | if (le32_to_cpu(rinfo->dir_dir->frag) != frag) { | |
427 | frag = le32_to_cpu(rinfo->dir_dir->frag); | |
f3c4ebe6 YZ |
428 | if (!rinfo->hash_order) { |
429 | fi->next_offset = req->r_readdir_offset; | |
430 | /* adjust ctx->pos to beginning of frag */ | |
431 | ctx->pos = ceph_make_fpos(frag, | |
432 | fi->next_offset, | |
433 | false); | |
434 | } | |
81c6aea5 | 435 | } |
fdd4e158 | 436 | |
f0494206 | 437 | fi->frag = frag; |
2817b000 SW |
438 | fi->last_readdir = req; |
439 | ||
fdd4e158 YZ |
440 | if (req->r_did_prepopulate) { |
441 | fi->readdir_cache_idx = req->r_readdir_cache_idx; | |
442 | if (fi->readdir_cache_idx < 0) { | |
443 | /* preclude from marking dir ordered */ | |
444 | fi->dir_ordered_count = 0; | |
8974eebd YZ |
445 | } else if (ceph_frag_is_leftmost(frag) && |
446 | fi->next_offset == 2) { | |
fdd4e158 YZ |
447 | /* note dir version at start of readdir so |
448 | * we can tell if any dentries get dropped */ | |
449 | fi->dir_release_count = req->r_dir_release_cnt; | |
450 | fi->dir_ordered_count = req->r_dir_ordered_cnt; | |
451 | } | |
452 | } else { | |
453 | dout("readdir !did_prepopulate"); | |
454 | /* disable readdir cache */ | |
455 | fi->readdir_cache_idx = -1; | |
456 | /* preclude from marking dir complete */ | |
457 | fi->dir_release_count = 0; | |
458 | } | |
459 | ||
f3c4ebe6 YZ |
460 | /* note next offset and last dentry name */ |
461 | if (rinfo->dir_nr > 0) { | |
2a5beea3 YZ |
462 | struct ceph_mds_reply_dir_entry *rde = |
463 | rinfo->dir_entries + (rinfo->dir_nr-1); | |
f3c4ebe6 YZ |
464 | unsigned next_offset = req->r_reply_info.dir_end ? |
465 | 2 : (fpos_off(rde->offset) + 1); | |
2a5beea3 | 466 | err = note_last_dentry(fi, rde->name, rde->name_len, |
f3c4ebe6 | 467 | next_offset); |
2817b000 SW |
468 | if (err) |
469 | return err; | |
f3c4ebe6 YZ |
470 | } else if (req->r_reply_info.dir_end) { |
471 | fi->next_offset = 2; | |
472 | /* keep last name */ | |
2817b000 SW |
473 | } |
474 | } | |
475 | ||
476 | rinfo = &fi->last_readdir->r_reply_info; | |
8974eebd | 477 | dout("readdir frag %x num %d pos %llx chunk first %llx\n", |
f3c4ebe6 | 478 | fi->frag, rinfo->dir_nr, ctx->pos, |
8974eebd | 479 | rinfo->dir_nr ? rinfo->dir_entries[0].offset : 0LL); |
77acfa29 | 480 | |
8974eebd YZ |
481 | i = 0; |
482 | /* search start position */ | |
483 | if (rinfo->dir_nr > 0) { | |
484 | int step, nr = rinfo->dir_nr; | |
485 | while (nr > 0) { | |
486 | step = nr >> 1; | |
487 | if (rinfo->dir_entries[i + step].offset < ctx->pos) { | |
488 | i += step + 1; | |
489 | nr -= step + 1; | |
490 | } else { | |
491 | nr = step; | |
492 | } | |
493 | } | |
494 | } | |
495 | for (; i < rinfo->dir_nr; i++) { | |
496 | struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; | |
3105c19c SW |
497 | struct ceph_vino vino; |
498 | ino_t ino; | |
499 | ||
8974eebd YZ |
500 | BUG_ON(rde->offset < ctx->pos); |
501 | ||
502 | ctx->pos = rde->offset; | |
503 | dout("readdir (%d/%d) -> %llx '%.*s' %p\n", | |
504 | i, rinfo->dir_nr, ctx->pos, | |
2a5beea3 | 505 | rde->name_len, rde->name, &rde->inode.in); |
8974eebd | 506 | |
2a5beea3 YZ |
507 | BUG_ON(!rde->inode.in); |
508 | ftype = le32_to_cpu(rde->inode.in->mode) >> 12; | |
509 | vino.ino = le64_to_cpu(rde->inode.in->ino); | |
510 | vino.snap = le64_to_cpu(rde->inode.in->snapid); | |
3105c19c | 511 | ino = ceph_vino_to_ino(vino); |
8974eebd | 512 | |
2a5beea3 YZ |
513 | if (!dir_emit(ctx, rde->name, rde->name_len, |
514 | ceph_translate_ino(inode->i_sb, ino), ftype)) { | |
2817b000 SW |
515 | dout("filldir stopping us...\n"); |
516 | return 0; | |
517 | } | |
77acfa29 | 518 | ctx->pos++; |
2817b000 SW |
519 | } |
520 | ||
f3c4ebe6 | 521 | if (fi->next_offset > 2) { |
2817b000 SW |
522 | ceph_mdsc_put_request(fi->last_readdir); |
523 | fi->last_readdir = NULL; | |
524 | goto more; | |
525 | } | |
526 | ||
527 | /* more frags? */ | |
f3c4ebe6 YZ |
528 | if (!ceph_frag_is_rightmost(fi->frag)) { |
529 | unsigned frag = ceph_frag_next(fi->frag); | |
530 | if (is_hash_order(ctx->pos)) { | |
531 | loff_t new_pos = ceph_make_fpos(ceph_frag_value(frag), | |
532 | fi->next_offset, true); | |
533 | if (new_pos > ctx->pos) | |
534 | ctx->pos = new_pos; | |
535 | /* keep last_name */ | |
536 | } else { | |
537 | ctx->pos = ceph_make_fpos(frag, fi->next_offset, false); | |
538 | kfree(fi->last_name); | |
539 | fi->last_name = NULL; | |
540 | } | |
2817b000 SW |
541 | dout("readdir next frag is %x\n", frag); |
542 | goto more; | |
543 | } | |
9cfa1098 | 544 | fi->flags |= CEPH_F_ATEND; |
2817b000 SW |
545 | |
546 | /* | |
547 | * if dir_release_count still matches the dir, no dentries | |
548 | * were released during the whole readdir, and we should have | |
549 | * the complete dir contents in our cache. | |
550 | */ | |
fdd4e158 YZ |
551 | if (atomic64_read(&ci->i_release_count) == fi->dir_release_count) { |
552 | spin_lock(&ci->i_ceph_lock); | |
553 | if (fi->dir_ordered_count == atomic64_read(&ci->i_ordered_count)) { | |
70db4f36 | 554 | dout(" marking %p complete and ordered\n", inode); |
fdd4e158 YZ |
555 | /* use i_size to track number of entries in |
556 | * readdir cache */ | |
557 | BUG_ON(fi->readdir_cache_idx < 0); | |
558 | i_size_write(inode, fi->readdir_cache_idx * | |
559 | sizeof(struct dentry*)); | |
560 | } else { | |
70db4f36 | 561 | dout(" marking %p complete\n", inode); |
fdd4e158 | 562 | } |
70db4f36 YZ |
563 | __ceph_dir_set_complete(ci, fi->dir_release_count, |
564 | fi->dir_ordered_count); | |
fdd4e158 | 565 | spin_unlock(&ci->i_ceph_lock); |
2817b000 | 566 | } |
2817b000 | 567 | |
77acfa29 | 568 | dout("readdir %p file %p done.\n", inode, file); |
2817b000 SW |
569 | return 0; |
570 | } | |
571 | ||
8974eebd | 572 | static void reset_readdir(struct ceph_file_info *fi) |
2817b000 SW |
573 | { |
574 | if (fi->last_readdir) { | |
575 | ceph_mdsc_put_request(fi->last_readdir); | |
576 | fi->last_readdir = NULL; | |
577 | } | |
578 | kfree(fi->last_name); | |
a1629c3b | 579 | fi->last_name = NULL; |
fdd4e158 YZ |
580 | fi->dir_release_count = 0; |
581 | fi->readdir_cache_idx = -1; | |
a78600e7 | 582 | fi->next_offset = 2; /* compensate for . and .. */ |
9cfa1098 | 583 | fi->flags &= ~CEPH_F_ATEND; |
2817b000 SW |
584 | } |
585 | ||
8974eebd YZ |
586 | /* |
587 | * discard buffered readdir content on seekdir(0), or seek to new frag, | |
588 | * or seek prior to current chunk | |
589 | */ | |
590 | static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos) | |
591 | { | |
592 | struct ceph_mds_reply_info_parsed *rinfo; | |
f3c4ebe6 | 593 | loff_t chunk_offset; |
8974eebd YZ |
594 | if (new_pos == 0) |
595 | return true; | |
f3c4ebe6 YZ |
596 | if (is_hash_order(new_pos)) { |
597 | /* no need to reset last_name for a forward seek when | |
598 | * dentries are sotred in hash order */ | |
599 | } else if (fi->frag |= fpos_frag(new_pos)) { | |
8974eebd | 600 | return true; |
f3c4ebe6 | 601 | } |
8974eebd YZ |
602 | rinfo = fi->last_readdir ? &fi->last_readdir->r_reply_info : NULL; |
603 | if (!rinfo || !rinfo->dir_nr) | |
604 | return true; | |
f3c4ebe6 YZ |
605 | chunk_offset = rinfo->dir_entries[0].offset; |
606 | return new_pos < chunk_offset || | |
607 | is_hash_order(new_pos) != is_hash_order(chunk_offset); | |
8974eebd YZ |
608 | } |
609 | ||
965c8e59 | 610 | static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence) |
2817b000 SW |
611 | { |
612 | struct ceph_file_info *fi = file->private_data; | |
613 | struct inode *inode = file->f_mapping->host; | |
2817b000 SW |
614 | loff_t retval; |
615 | ||
5955102c | 616 | inode_lock(inode); |
06222e49 | 617 | retval = -EINVAL; |
965c8e59 | 618 | switch (whence) { |
2817b000 SW |
619 | case SEEK_CUR: |
620 | offset += file->f_pos; | |
06222e49 JB |
621 | case SEEK_SET: |
622 | break; | |
fdd4e158 YZ |
623 | case SEEK_END: |
624 | retval = -EOPNOTSUPP; | |
06222e49 JB |
625 | default: |
626 | goto out; | |
2817b000 | 627 | } |
06222e49 | 628 | |
f0494206 | 629 | if (offset >= 0) { |
f3c4ebe6 YZ |
630 | if (need_reset_readdir(fi, offset)) { |
631 | dout("dir_llseek dropping %p content\n", file); | |
632 | reset_readdir(fi); | |
633 | } else if (is_hash_order(offset) && offset > file->f_pos) { | |
634 | /* for hash offset, we don't know if a forward seek | |
635 | * is within same frag */ | |
636 | fi->dir_release_count = 0; | |
637 | fi->readdir_cache_idx = -1; | |
638 | } | |
639 | ||
2817b000 SW |
640 | if (offset != file->f_pos) { |
641 | file->f_pos = offset; | |
642 | file->f_version = 0; | |
9cfa1098 | 643 | fi->flags &= ~CEPH_F_ATEND; |
2817b000 SW |
644 | } |
645 | retval = offset; | |
2817b000 | 646 | } |
06222e49 | 647 | out: |
5955102c | 648 | inode_unlock(inode); |
2817b000 SW |
649 | return retval; |
650 | } | |
651 | ||
652 | /* | |
468640e3 | 653 | * Handle lookups for the hidden .snap directory. |
2817b000 | 654 | */ |
468640e3 SW |
655 | int ceph_handle_snapdir(struct ceph_mds_request *req, |
656 | struct dentry *dentry, int err) | |
2817b000 | 657 | { |
3d14c5d2 | 658 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
2b0143b5 | 659 | struct inode *parent = d_inode(dentry->d_parent); /* we hold i_mutex */ |
2817b000 SW |
660 | |
661 | /* .snap dir? */ | |
662 | if (err == -ENOENT && | |
455cec0a | 663 | ceph_snap(parent) == CEPH_NOSNAP && |
6b805185 | 664 | strcmp(dentry->d_name.name, |
3d14c5d2 | 665 | fsc->mount_options->snapdir_name) == 0) { |
2817b000 | 666 | struct inode *inode = ceph_get_snapdir(parent); |
a455589f AV |
667 | dout("ENOENT on snapdir %p '%pd', linking to snapdir %p\n", |
668 | dentry, dentry, inode); | |
9358c6d4 | 669 | BUG_ON(!d_unhashed(dentry)); |
2817b000 SW |
670 | d_add(dentry, inode); |
671 | err = 0; | |
672 | } | |
468640e3 SW |
673 | return err; |
674 | } | |
2817b000 | 675 | |
468640e3 SW |
676 | /* |
677 | * Figure out final result of a lookup/open request. | |
678 | * | |
679 | * Mainly, make sure we return the final req->r_dentry (if it already | |
680 | * existed) in place of the original VFS-provided dentry when they | |
681 | * differ. | |
682 | * | |
683 | * Gracefully handle the case where the MDS replies with -ENOENT and | |
684 | * no trace (which it may do, at its discretion, e.g., if it doesn't | |
685 | * care to issue a lease on the negative dentry). | |
686 | */ | |
687 | struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, | |
688 | struct dentry *dentry, int err) | |
689 | { | |
2817b000 SW |
690 | if (err == -ENOENT) { |
691 | /* no trace? */ | |
692 | err = 0; | |
693 | if (!req->r_reply_info.head->is_dentry) { | |
694 | dout("ENOENT and no trace, dentry %p inode %p\n", | |
2b0143b5 DH |
695 | dentry, d_inode(dentry)); |
696 | if (d_really_is_positive(dentry)) { | |
2817b000 SW |
697 | d_drop(dentry); |
698 | err = -ENOENT; | |
699 | } else { | |
700 | d_add(dentry, NULL); | |
701 | } | |
702 | } | |
703 | } | |
704 | if (err) | |
705 | dentry = ERR_PTR(err); | |
706 | else if (dentry != req->r_dentry) | |
707 | dentry = dget(req->r_dentry); /* we got spliced */ | |
708 | else | |
709 | dentry = NULL; | |
710 | return dentry; | |
711 | } | |
712 | ||
1d1de916 SW |
713 | static int is_root_ceph_dentry(struct inode *inode, struct dentry *dentry) |
714 | { | |
715 | return ceph_ino(inode) == CEPH_INO_ROOT && | |
716 | strncmp(dentry->d_name.name, ".ceph", 5) == 0; | |
717 | } | |
718 | ||
2817b000 SW |
719 | /* |
720 | * Look up a single dir entry. If there is a lookup intent, inform | |
721 | * the MDS so that it gets our 'caps wanted' value in a single op. | |
722 | */ | |
723 | static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry, | |
00cd8dd3 | 724 | unsigned int flags) |
2817b000 | 725 | { |
3d14c5d2 YS |
726 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
727 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
728 | struct ceph_mds_request *req; |
729 | int op; | |
315f2408 | 730 | int mask; |
2817b000 SW |
731 | int err; |
732 | ||
a455589f AV |
733 | dout("lookup %p dentry %p '%pd'\n", |
734 | dir, dentry, dentry); | |
2817b000 SW |
735 | |
736 | if (dentry->d_name.len > NAME_MAX) | |
737 | return ERR_PTR(-ENAMETOOLONG); | |
738 | ||
739 | err = ceph_init_dentry(dentry); | |
740 | if (err < 0) | |
741 | return ERR_PTR(err); | |
742 | ||
2817b000 | 743 | /* can we conclude ENOENT locally? */ |
2b0143b5 | 744 | if (d_really_is_negative(dentry)) { |
2817b000 SW |
745 | struct ceph_inode_info *ci = ceph_inode(dir); |
746 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
747 | ||
be655596 | 748 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
749 | dout(" dir %p flags are %d\n", dir, ci->i_ceph_flags); |
750 | if (strncmp(dentry->d_name.name, | |
3d14c5d2 | 751 | fsc->mount_options->snapdir_name, |
2817b000 | 752 | dentry->d_name.len) && |
1d1de916 | 753 | !is_root_ceph_dentry(dir, dentry) && |
e2c3de04 | 754 | ceph_test_mount_opt(fsc, DCACHE) && |
2f276c51 | 755 | __ceph_dir_is_complete(ci) && |
2817b000 | 756 | (__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) { |
be655596 | 757 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
758 | dout(" dir %p complete, -ENOENT\n", dir); |
759 | d_add(dentry, NULL); | |
760 | di->lease_shared_gen = ci->i_shared_gen; | |
761 | return NULL; | |
762 | } | |
be655596 | 763 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
764 | } |
765 | ||
766 | op = ceph_snap(dir) == CEPH_SNAPDIR ? | |
767 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; | |
768 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); | |
769 | if (IS_ERR(req)) | |
7e34bc52 | 770 | return ERR_CAST(req); |
2817b000 SW |
771 | req->r_dentry = dget(dentry); |
772 | req->r_num_caps = 2; | |
315f2408 YZ |
773 | |
774 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
775 | if (ceph_security_xattr_wanted(dir)) | |
776 | mask |= CEPH_CAP_XATTR_SHARED; | |
777 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
778 | ||
2817b000 SW |
779 | req->r_locked_dir = dir; |
780 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
468640e3 | 781 | err = ceph_handle_snapdir(req, dentry, err); |
2817b000 SW |
782 | dentry = ceph_finish_lookup(req, dentry, err); |
783 | ceph_mdsc_put_request(req); /* will dput(dentry) */ | |
784 | dout("lookup result=%p\n", dentry); | |
785 | return dentry; | |
786 | } | |
787 | ||
788 | /* | |
789 | * If we do a create but get no trace back from the MDS, follow up with | |
790 | * a lookup (the VFS expects us to link up the provided dentry). | |
791 | */ | |
792 | int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry) | |
793 | { | |
00cd8dd3 | 794 | struct dentry *result = ceph_lookup(dir, dentry, 0); |
2817b000 SW |
795 | |
796 | if (result && !IS_ERR(result)) { | |
797 | /* | |
798 | * We created the item, then did a lookup, and found | |
799 | * it was already linked to another inode we already | |
4d41cef2 YZ |
800 | * had in our cache (and thus got spliced). To not |
801 | * confuse VFS (especially when inode is a directory), | |
802 | * we don't link our dentry to that inode, return an | |
803 | * error instead. | |
804 | * | |
805 | * This event should be rare and it happens only when | |
806 | * we talk to old MDS. Recent MDS does not send traceless | |
807 | * reply for request that creates new inode. | |
2817b000 | 808 | */ |
5cba372c | 809 | d_drop(result); |
4d41cef2 | 810 | return -ESTALE; |
2817b000 SW |
811 | } |
812 | return PTR_ERR(result); | |
813 | } | |
814 | ||
815 | static int ceph_mknod(struct inode *dir, struct dentry *dentry, | |
1a67aafb | 816 | umode_t mode, dev_t rdev) |
2817b000 | 817 | { |
3d14c5d2 YS |
818 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
819 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 820 | struct ceph_mds_request *req; |
b1ee94aa | 821 | struct ceph_acls_info acls = {}; |
2817b000 SW |
822 | int err; |
823 | ||
824 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
825 | return -EROFS; | |
826 | ||
b1ee94aa YZ |
827 | err = ceph_pre_init_acls(dir, &mode, &acls); |
828 | if (err < 0) | |
829 | return err; | |
830 | ||
1a67aafb | 831 | dout("mknod in dir %p dentry %p mode 0%ho rdev %d\n", |
2817b000 SW |
832 | dir, dentry, mode, rdev); |
833 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS); | |
834 | if (IS_ERR(req)) { | |
b1ee94aa YZ |
835 | err = PTR_ERR(req); |
836 | goto out; | |
2817b000 SW |
837 | } |
838 | req->r_dentry = dget(dentry); | |
839 | req->r_num_caps = 2; | |
840 | req->r_locked_dir = dir; | |
841 | req->r_args.mknod.mode = cpu_to_le32(mode); | |
842 | req->r_args.mknod.rdev = cpu_to_le32(rdev); | |
843 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
844 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
b1ee94aa YZ |
845 | if (acls.pagelist) { |
846 | req->r_pagelist = acls.pagelist; | |
847 | acls.pagelist = NULL; | |
848 | } | |
2817b000 SW |
849 | err = ceph_mdsc_do_request(mdsc, dir, req); |
850 | if (!err && !req->r_reply_info.head->is_dentry) | |
851 | err = ceph_handle_notrace_create(dir, dentry); | |
852 | ceph_mdsc_put_request(req); | |
b1ee94aa | 853 | out: |
7221fe4c | 854 | if (!err) |
2b0143b5 | 855 | ceph_init_inode_acls(d_inode(dentry), &acls); |
b20a95a0 | 856 | else |
2817b000 | 857 | d_drop(dentry); |
b1ee94aa | 858 | ceph_release_acls_info(&acls); |
2817b000 SW |
859 | return err; |
860 | } | |
861 | ||
4acdaf27 | 862 | static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 863 | bool excl) |
2817b000 | 864 | { |
2d83bde9 | 865 | return ceph_mknod(dir, dentry, mode, 0); |
2817b000 SW |
866 | } |
867 | ||
868 | static int ceph_symlink(struct inode *dir, struct dentry *dentry, | |
869 | const char *dest) | |
870 | { | |
3d14c5d2 YS |
871 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
872 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
873 | struct ceph_mds_request *req; |
874 | int err; | |
875 | ||
876 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
877 | return -EROFS; | |
878 | ||
879 | dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest); | |
880 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS); | |
881 | if (IS_ERR(req)) { | |
b1ee94aa YZ |
882 | err = PTR_ERR(req); |
883 | goto out; | |
2817b000 | 884 | } |
687265e5 | 885 | req->r_path2 = kstrdup(dest, GFP_KERNEL); |
a149bb9a SK |
886 | if (!req->r_path2) { |
887 | err = -ENOMEM; | |
888 | ceph_mdsc_put_request(req); | |
889 | goto out; | |
890 | } | |
2817b000 | 891 | req->r_locked_dir = dir; |
a149bb9a SK |
892 | req->r_dentry = dget(dentry); |
893 | req->r_num_caps = 2; | |
2817b000 SW |
894 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
895 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
896 | err = ceph_mdsc_do_request(mdsc, dir, req); | |
897 | if (!err && !req->r_reply_info.head->is_dentry) | |
898 | err = ceph_handle_notrace_create(dir, dentry); | |
899 | ceph_mdsc_put_request(req); | |
b1ee94aa YZ |
900 | out: |
901 | if (err) | |
2817b000 SW |
902 | d_drop(dentry); |
903 | return err; | |
904 | } | |
905 | ||
18bb1db3 | 906 | static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
2817b000 | 907 | { |
3d14c5d2 YS |
908 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
909 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 910 | struct ceph_mds_request *req; |
b1ee94aa | 911 | struct ceph_acls_info acls = {}; |
2817b000 SW |
912 | int err = -EROFS; |
913 | int op; | |
914 | ||
915 | if (ceph_snap(dir) == CEPH_SNAPDIR) { | |
916 | /* mkdir .snap/foo is a MKSNAP */ | |
917 | op = CEPH_MDS_OP_MKSNAP; | |
a455589f AV |
918 | dout("mksnap dir %p snap '%pd' dn %p\n", dir, |
919 | dentry, dentry); | |
2817b000 | 920 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { |
18bb1db3 | 921 | dout("mkdir dir %p dn %p mode 0%ho\n", dir, dentry, mode); |
2817b000 SW |
922 | op = CEPH_MDS_OP_MKDIR; |
923 | } else { | |
924 | goto out; | |
925 | } | |
b1ee94aa YZ |
926 | |
927 | mode |= S_IFDIR; | |
928 | err = ceph_pre_init_acls(dir, &mode, &acls); | |
929 | if (err < 0) | |
930 | goto out; | |
931 | ||
2817b000 SW |
932 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
933 | if (IS_ERR(req)) { | |
934 | err = PTR_ERR(req); | |
935 | goto out; | |
936 | } | |
937 | ||
938 | req->r_dentry = dget(dentry); | |
939 | req->r_num_caps = 2; | |
940 | req->r_locked_dir = dir; | |
941 | req->r_args.mkdir.mode = cpu_to_le32(mode); | |
942 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
943 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
b1ee94aa YZ |
944 | if (acls.pagelist) { |
945 | req->r_pagelist = acls.pagelist; | |
946 | acls.pagelist = NULL; | |
947 | } | |
2817b000 | 948 | err = ceph_mdsc_do_request(mdsc, dir, req); |
275dd19e YZ |
949 | if (!err && |
950 | !req->r_reply_info.head->is_target && | |
951 | !req->r_reply_info.head->is_dentry) | |
2817b000 SW |
952 | err = ceph_handle_notrace_create(dir, dentry); |
953 | ceph_mdsc_put_request(req); | |
954 | out: | |
b20a95a0 | 955 | if (!err) |
2b0143b5 | 956 | ceph_init_inode_acls(d_inode(dentry), &acls); |
b20a95a0 | 957 | else |
2817b000 | 958 | d_drop(dentry); |
b1ee94aa | 959 | ceph_release_acls_info(&acls); |
2817b000 SW |
960 | return err; |
961 | } | |
962 | ||
963 | static int ceph_link(struct dentry *old_dentry, struct inode *dir, | |
964 | struct dentry *dentry) | |
965 | { | |
3d14c5d2 YS |
966 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
967 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
968 | struct ceph_mds_request *req; |
969 | int err; | |
970 | ||
971 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
972 | return -EROFS; | |
973 | ||
974 | dout("link in dir %p old_dentry %p dentry %p\n", dir, | |
975 | old_dentry, dentry); | |
976 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS); | |
977 | if (IS_ERR(req)) { | |
978 | d_drop(dentry); | |
979 | return PTR_ERR(req); | |
980 | } | |
981 | req->r_dentry = dget(dentry); | |
982 | req->r_num_caps = 2; | |
4b58c9b1 | 983 | req->r_old_dentry = dget(old_dentry); |
2817b000 SW |
984 | req->r_locked_dir = dir; |
985 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
986 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
ad88f23f YZ |
987 | /* release LINK_SHARED on source inode (mds will lock it) */ |
988 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; | |
2817b000 | 989 | err = ceph_mdsc_do_request(mdsc, dir, req); |
70b666c3 | 990 | if (err) { |
2817b000 | 991 | d_drop(dentry); |
70b666c3 | 992 | } else if (!req->r_reply_info.head->is_dentry) { |
2b0143b5 DH |
993 | ihold(d_inode(old_dentry)); |
994 | d_instantiate(dentry, d_inode(old_dentry)); | |
70b666c3 | 995 | } |
2817b000 SW |
996 | ceph_mdsc_put_request(req); |
997 | return err; | |
998 | } | |
999 | ||
1000 | /* | |
1001 | * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it | |
1002 | * looks like the link count will hit 0, drop any other caps (other | |
1003 | * than PIN) we don't specifically want (due to the file still being | |
1004 | * open). | |
1005 | */ | |
1006 | static int drop_caps_for_unlink(struct inode *inode) | |
1007 | { | |
1008 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1009 | int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL; | |
1010 | ||
be655596 | 1011 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
1012 | if (inode->i_nlink == 1) { |
1013 | drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN); | |
1014 | ci->i_ceph_flags |= CEPH_I_NODELAY; | |
1015 | } | |
be655596 | 1016 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
1017 | return drop; |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | * rmdir and unlink are differ only by the metadata op code | |
1022 | */ | |
1023 | static int ceph_unlink(struct inode *dir, struct dentry *dentry) | |
1024 | { | |
3d14c5d2 YS |
1025 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
1026 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2b0143b5 | 1027 | struct inode *inode = d_inode(dentry); |
2817b000 SW |
1028 | struct ceph_mds_request *req; |
1029 | int err = -EROFS; | |
1030 | int op; | |
1031 | ||
1032 | if (ceph_snap(dir) == CEPH_SNAPDIR) { | |
1033 | /* rmdir .snap/foo is RMSNAP */ | |
a455589f | 1034 | dout("rmsnap dir %p '%pd' dn %p\n", dir, dentry, dentry); |
2817b000 SW |
1035 | op = CEPH_MDS_OP_RMSNAP; |
1036 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { | |
1037 | dout("unlink/rmdir dir %p dn %p inode %p\n", | |
1038 | dir, dentry, inode); | |
e36cb0b8 | 1039 | op = d_is_dir(dentry) ? |
2817b000 SW |
1040 | CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK; |
1041 | } else | |
1042 | goto out; | |
1043 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); | |
1044 | if (IS_ERR(req)) { | |
1045 | err = PTR_ERR(req); | |
1046 | goto out; | |
1047 | } | |
1048 | req->r_dentry = dget(dentry); | |
1049 | req->r_num_caps = 2; | |
1050 | req->r_locked_dir = dir; | |
1051 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
1052 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1053 | req->r_inode_drop = drop_caps_for_unlink(inode); | |
1054 | err = ceph_mdsc_do_request(mdsc, dir, req); | |
1055 | if (!err && !req->r_reply_info.head->is_dentry) | |
1056 | d_delete(dentry); | |
1057 | ceph_mdsc_put_request(req); | |
1058 | out: | |
1059 | return err; | |
1060 | } | |
1061 | ||
1062 | static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1063 | struct inode *new_dir, struct dentry *new_dentry) | |
1064 | { | |
3d14c5d2 YS |
1065 | struct ceph_fs_client *fsc = ceph_sb_to_client(old_dir->i_sb); |
1066 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 1067 | struct ceph_mds_request *req; |
0ea611a3 | 1068 | int op = CEPH_MDS_OP_RENAME; |
2817b000 SW |
1069 | int err; |
1070 | ||
1071 | if (ceph_snap(old_dir) != ceph_snap(new_dir)) | |
1072 | return -EXDEV; | |
0ea611a3 YZ |
1073 | if (ceph_snap(old_dir) != CEPH_NOSNAP) { |
1074 | if (old_dir == new_dir && ceph_snap(old_dir) == CEPH_SNAPDIR) | |
1075 | op = CEPH_MDS_OP_RENAMESNAP; | |
1076 | else | |
1077 | return -EROFS; | |
1078 | } | |
2817b000 SW |
1079 | dout("rename dir %p dentry %p to dir %p dentry %p\n", |
1080 | old_dir, old_dentry, new_dir, new_dentry); | |
0ea611a3 | 1081 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
2817b000 SW |
1082 | if (IS_ERR(req)) |
1083 | return PTR_ERR(req); | |
180061a5 | 1084 | ihold(old_dir); |
2817b000 SW |
1085 | req->r_dentry = dget(new_dentry); |
1086 | req->r_num_caps = 2; | |
1087 | req->r_old_dentry = dget(old_dentry); | |
180061a5 | 1088 | req->r_old_dentry_dir = old_dir; |
2817b000 SW |
1089 | req->r_locked_dir = new_dir; |
1090 | req->r_old_dentry_drop = CEPH_CAP_FILE_SHARED; | |
1091 | req->r_old_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1092 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
1093 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1094 | /* release LINK_RDCACHE on source inode (mds will lock it) */ | |
1095 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; | |
2b0143b5 DH |
1096 | if (d_really_is_positive(new_dentry)) |
1097 | req->r_inode_drop = drop_caps_for_unlink(d_inode(new_dentry)); | |
2817b000 SW |
1098 | err = ceph_mdsc_do_request(mdsc, old_dir, req); |
1099 | if (!err && !req->r_reply_info.head->is_dentry) { | |
1100 | /* | |
1101 | * Normally d_move() is done by fill_trace (called by | |
1102 | * do_request, above). If there is no trace, we need | |
1103 | * to do it here. | |
1104 | */ | |
ea1409f9 | 1105 | |
fdd4e158 YZ |
1106 | /* d_move screws up sibling dentries' offsets */ |
1107 | ceph_dir_clear_complete(old_dir); | |
1108 | ceph_dir_clear_complete(new_dir); | |
1109 | ||
2817b000 | 1110 | d_move(old_dentry, new_dentry); |
ea1409f9 SW |
1111 | |
1112 | /* ensure target dentry is invalidated, despite | |
1113 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d | 1114 | ceph_invalidate_dentry_lease(new_dentry); |
2817b000 SW |
1115 | } |
1116 | ceph_mdsc_put_request(req); | |
1117 | return err; | |
1118 | } | |
1119 | ||
81a6cf2d SW |
1120 | /* |
1121 | * Ensure a dentry lease will no longer revalidate. | |
1122 | */ | |
1123 | void ceph_invalidate_dentry_lease(struct dentry *dentry) | |
1124 | { | |
1125 | spin_lock(&dentry->d_lock); | |
1126 | dentry->d_time = jiffies; | |
1127 | ceph_dentry(dentry)->lease_shared_gen = 0; | |
1128 | spin_unlock(&dentry->d_lock); | |
1129 | } | |
2817b000 SW |
1130 | |
1131 | /* | |
1132 | * Check if dentry lease is valid. If not, delete the lease. Try to | |
1133 | * renew if the least is more than half up. | |
1134 | */ | |
1135 | static int dentry_lease_is_valid(struct dentry *dentry) | |
1136 | { | |
1137 | struct ceph_dentry_info *di; | |
1138 | struct ceph_mds_session *s; | |
1139 | int valid = 0; | |
1140 | u32 gen; | |
1141 | unsigned long ttl; | |
1142 | struct ceph_mds_session *session = NULL; | |
1143 | struct inode *dir = NULL; | |
1144 | u32 seq = 0; | |
1145 | ||
1146 | spin_lock(&dentry->d_lock); | |
1147 | di = ceph_dentry(dentry); | |
3d8eb7a9 | 1148 | if (di->lease_session) { |
2817b000 | 1149 | s = di->lease_session; |
d8fb02ab | 1150 | spin_lock(&s->s_gen_ttl_lock); |
2817b000 SW |
1151 | gen = s->s_cap_gen; |
1152 | ttl = s->s_cap_ttl; | |
d8fb02ab | 1153 | spin_unlock(&s->s_gen_ttl_lock); |
2817b000 SW |
1154 | |
1155 | if (di->lease_gen == gen && | |
1156 | time_before(jiffies, dentry->d_time) && | |
1157 | time_before(jiffies, ttl)) { | |
1158 | valid = 1; | |
1159 | if (di->lease_renew_after && | |
1160 | time_after(jiffies, di->lease_renew_after)) { | |
1161 | /* we should renew */ | |
2b0143b5 | 1162 | dir = d_inode(dentry->d_parent); |
2817b000 SW |
1163 | session = ceph_get_mds_session(s); |
1164 | seq = di->lease_seq; | |
1165 | di->lease_renew_after = 0; | |
1166 | di->lease_renew_from = jiffies; | |
1167 | } | |
2817b000 SW |
1168 | } |
1169 | } | |
1170 | spin_unlock(&dentry->d_lock); | |
1171 | ||
1172 | if (session) { | |
1173 | ceph_mdsc_lease_send_msg(session, dir, dentry, | |
1174 | CEPH_MDS_LEASE_RENEW, seq); | |
1175 | ceph_put_mds_session(session); | |
1176 | } | |
1177 | dout("dentry_lease_is_valid - dentry %p = %d\n", dentry, valid); | |
1178 | return valid; | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * Check if directory-wide content lease/cap is valid. | |
1183 | */ | |
1184 | static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry) | |
1185 | { | |
1186 | struct ceph_inode_info *ci = ceph_inode(dir); | |
1187 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
1188 | int valid = 0; | |
1189 | ||
be655596 | 1190 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
1191 | if (ci->i_shared_gen == di->lease_shared_gen) |
1192 | valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1); | |
be655596 | 1193 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
1194 | dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n", |
1195 | dir, (unsigned)ci->i_shared_gen, dentry, | |
1196 | (unsigned)di->lease_shared_gen, valid); | |
1197 | return valid; | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * Check if cached dentry can be trusted. | |
1202 | */ | |
0b728e19 | 1203 | static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags) |
2817b000 | 1204 | { |
bf1c6aca | 1205 | int valid = 0; |
641235d8 | 1206 | struct dentry *parent; |
34286d66 NP |
1207 | struct inode *dir; |
1208 | ||
0b728e19 | 1209 | if (flags & LOOKUP_RCU) |
34286d66 NP |
1210 | return -ECHILD; |
1211 | ||
a455589f | 1212 | dout("d_revalidate %p '%pd' inode %p offset %lld\n", dentry, |
2b0143b5 | 1213 | dentry, d_inode(dentry), ceph_dentry(dentry)->offset); |
2817b000 | 1214 | |
641235d8 YZ |
1215 | parent = dget_parent(dentry); |
1216 | dir = d_inode(parent); | |
bf1c6aca | 1217 | |
2817b000 SW |
1218 | /* always trust cached snapped dentries, snapdir dentry */ |
1219 | if (ceph_snap(dir) != CEPH_NOSNAP) { | |
a455589f | 1220 | dout("d_revalidate %p '%pd' inode %p is SNAPPED\n", dentry, |
2b0143b5 | 1221 | dentry, d_inode(dentry)); |
bf1c6aca | 1222 | valid = 1; |
2b0143b5 DH |
1223 | } else if (d_really_is_positive(dentry) && |
1224 | ceph_snap(d_inode(dentry)) == CEPH_SNAPDIR) { | |
bf1c6aca SW |
1225 | valid = 1; |
1226 | } else if (dentry_lease_is_valid(dentry) || | |
1227 | dir_lease_is_valid(dir, dentry)) { | |
2b0143b5 DH |
1228 | if (d_really_is_positive(dentry)) |
1229 | valid = ceph_is_any_caps(d_inode(dentry)); | |
9215aeea YZ |
1230 | else |
1231 | valid = 1; | |
2817b000 | 1232 | } |
2817b000 | 1233 | |
200fd27c YZ |
1234 | if (!valid) { |
1235 | struct ceph_mds_client *mdsc = | |
1236 | ceph_sb_to_client(dir->i_sb)->mdsc; | |
1237 | struct ceph_mds_request *req; | |
1238 | int op, mask, err; | |
1239 | ||
1240 | op = ceph_snap(dir) == CEPH_SNAPDIR ? | |
1241 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; | |
1242 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); | |
1243 | if (!IS_ERR(req)) { | |
1244 | req->r_dentry = dget(dentry); | |
1245 | req->r_num_caps = 2; | |
1246 | ||
1247 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
1248 | if (ceph_security_xattr_wanted(dir)) | |
1249 | mask |= CEPH_CAP_XATTR_SHARED; | |
1250 | req->r_args.getattr.mask = mask; | |
1251 | ||
1252 | req->r_locked_dir = dir; | |
1253 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
1254 | if (err == 0 || err == -ENOENT) { | |
1255 | if (dentry == req->r_dentry) { | |
1256 | valid = !d_unhashed(dentry); | |
1257 | } else { | |
1258 | d_invalidate(req->r_dentry); | |
1259 | err = -EAGAIN; | |
1260 | } | |
1261 | } | |
1262 | ceph_mdsc_put_request(req); | |
1263 | dout("d_revalidate %p lookup result=%d\n", | |
1264 | dentry, err); | |
1265 | } | |
1266 | } | |
1267 | ||
bf1c6aca | 1268 | dout("d_revalidate %p %s\n", dentry, valid ? "valid" : "invalid"); |
9215aeea | 1269 | if (valid) { |
bf1c6aca | 1270 | ceph_dentry_lru_touch(dentry); |
9215aeea YZ |
1271 | } else { |
1272 | ceph_dir_clear_complete(dir); | |
9215aeea | 1273 | } |
641235d8 YZ |
1274 | |
1275 | dput(parent); | |
bf1c6aca | 1276 | return valid; |
2817b000 SW |
1277 | } |
1278 | ||
1279 | /* | |
147851d2 | 1280 | * Release our ceph_dentry_info. |
2817b000 | 1281 | */ |
147851d2 | 1282 | static void ceph_d_release(struct dentry *dentry) |
2817b000 SW |
1283 | { |
1284 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
2817b000 | 1285 | |
147851d2 | 1286 | dout("d_release %p\n", dentry); |
3d8eb7a9 SW |
1287 | ceph_dentry_lru_del(dentry); |
1288 | if (di->lease_session) | |
1289 | ceph_put_mds_session(di->lease_session); | |
1290 | kmem_cache_free(ceph_dentry_cachep, di); | |
1291 | dentry->d_fsdata = NULL; | |
2817b000 SW |
1292 | } |
1293 | ||
1294 | static int ceph_snapdir_d_revalidate(struct dentry *dentry, | |
0b728e19 | 1295 | unsigned int flags) |
2817b000 SW |
1296 | { |
1297 | /* | |
1298 | * Eventually, we'll want to revalidate snapped metadata | |
1299 | * too... probably... | |
1300 | */ | |
1301 | return 1; | |
1302 | } | |
1303 | ||
b58dc410 SW |
1304 | /* |
1305 | * When the VFS prunes a dentry from the cache, we need to clear the | |
1306 | * complete flag on the parent directory. | |
1307 | * | |
1308 | * Called under dentry->d_lock. | |
1309 | */ | |
1310 | static void ceph_d_prune(struct dentry *dentry) | |
1311 | { | |
774ac21d | 1312 | dout("ceph_d_prune %p\n", dentry); |
b58dc410 SW |
1313 | |
1314 | /* do we have a valid parent? */ | |
8842b3be | 1315 | if (IS_ROOT(dentry)) |
b58dc410 SW |
1316 | return; |
1317 | ||
2f276c51 | 1318 | /* if we are not hashed, we don't affect dir's completeness */ |
b58dc410 SW |
1319 | if (d_unhashed(dentry)) |
1320 | return; | |
2817b000 | 1321 | |
b58dc410 SW |
1322 | /* |
1323 | * we hold d_lock, so d_parent is stable, and d_fsdata is never | |
1324 | * cleared until d_release | |
1325 | */ | |
2b0143b5 | 1326 | ceph_dir_clear_complete(d_inode(dentry->d_parent)); |
b58dc410 | 1327 | } |
2817b000 SW |
1328 | |
1329 | /* | |
1330 | * read() on a dir. This weird interface hack only works if mounted | |
1331 | * with '-o dirstat'. | |
1332 | */ | |
1333 | static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, | |
1334 | loff_t *ppos) | |
1335 | { | |
1336 | struct ceph_file_info *cf = file->private_data; | |
496ad9aa | 1337 | struct inode *inode = file_inode(file); |
2817b000 SW |
1338 | struct ceph_inode_info *ci = ceph_inode(inode); |
1339 | int left; | |
ae598083 | 1340 | const int bufsize = 1024; |
2817b000 | 1341 | |
3d14c5d2 | 1342 | if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT)) |
2817b000 SW |
1343 | return -EISDIR; |
1344 | ||
1345 | if (!cf->dir_info) { | |
687265e5 | 1346 | cf->dir_info = kmalloc(bufsize, GFP_KERNEL); |
2817b000 SW |
1347 | if (!cf->dir_info) |
1348 | return -ENOMEM; | |
1349 | cf->dir_info_len = | |
ae598083 | 1350 | snprintf(cf->dir_info, bufsize, |
2817b000 SW |
1351 | "entries: %20lld\n" |
1352 | " files: %20lld\n" | |
1353 | " subdirs: %20lld\n" | |
1354 | "rentries: %20lld\n" | |
1355 | " rfiles: %20lld\n" | |
1356 | " rsubdirs: %20lld\n" | |
1357 | "rbytes: %20lld\n" | |
1358 | "rctime: %10ld.%09ld\n", | |
1359 | ci->i_files + ci->i_subdirs, | |
1360 | ci->i_files, | |
1361 | ci->i_subdirs, | |
1362 | ci->i_rfiles + ci->i_rsubdirs, | |
1363 | ci->i_rfiles, | |
1364 | ci->i_rsubdirs, | |
1365 | ci->i_rbytes, | |
1366 | (long)ci->i_rctime.tv_sec, | |
1367 | (long)ci->i_rctime.tv_nsec); | |
1368 | } | |
1369 | ||
1370 | if (*ppos >= cf->dir_info_len) | |
1371 | return 0; | |
1372 | size = min_t(unsigned, size, cf->dir_info_len-*ppos); | |
1373 | left = copy_to_user(buf, cf->dir_info + *ppos, size); | |
1374 | if (left == size) | |
1375 | return -EFAULT; | |
1376 | *ppos += (size - left); | |
1377 | return size - left; | |
1378 | } | |
1379 | ||
2817b000 SW |
1380 | /* |
1381 | * We maintain a private dentry LRU. | |
1382 | * | |
1383 | * FIXME: this needs to be changed to a per-mds lru to be useful. | |
1384 | */ | |
1385 | void ceph_dentry_lru_add(struct dentry *dn) | |
1386 | { | |
1387 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1388 | struct ceph_mds_client *mdsc; | |
2817b000 | 1389 | |
a455589f | 1390 | dout("dentry_lru_add %p %p '%pd'\n", di, dn, dn); |
3d8eb7a9 SW |
1391 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1392 | spin_lock(&mdsc->dentry_lru_lock); | |
1393 | list_add_tail(&di->lru, &mdsc->dentry_lru); | |
1394 | mdsc->num_dentry++; | |
1395 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1396 | } |
1397 | ||
1398 | void ceph_dentry_lru_touch(struct dentry *dn) | |
1399 | { | |
1400 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1401 | struct ceph_mds_client *mdsc; | |
2817b000 | 1402 | |
a455589f AV |
1403 | dout("dentry_lru_touch %p %p '%pd' (offset %lld)\n", di, dn, dn, |
1404 | di->offset); | |
3d8eb7a9 SW |
1405 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1406 | spin_lock(&mdsc->dentry_lru_lock); | |
1407 | list_move_tail(&di->lru, &mdsc->dentry_lru); | |
1408 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1409 | } |
1410 | ||
1411 | void ceph_dentry_lru_del(struct dentry *dn) | |
1412 | { | |
1413 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1414 | struct ceph_mds_client *mdsc; | |
1415 | ||
a455589f | 1416 | dout("dentry_lru_del %p %p '%pd'\n", di, dn, dn); |
3d8eb7a9 SW |
1417 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1418 | spin_lock(&mdsc->dentry_lru_lock); | |
1419 | list_del_init(&di->lru); | |
1420 | mdsc->num_dentry--; | |
1421 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1422 | } |
1423 | ||
6c0f3af7 SW |
1424 | /* |
1425 | * Return name hash for a given dentry. This is dependent on | |
1426 | * the parent directory's hash function. | |
1427 | */ | |
e5f86dc3 | 1428 | unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn) |
6c0f3af7 | 1429 | { |
6c0f3af7 SW |
1430 | struct ceph_inode_info *dci = ceph_inode(dir); |
1431 | ||
1432 | switch (dci->i_dir_layout.dl_dir_hash) { | |
1433 | case 0: /* for backward compat */ | |
1434 | case CEPH_STR_HASH_LINUX: | |
1435 | return dn->d_name.hash; | |
1436 | ||
1437 | default: | |
1438 | return ceph_str_hash(dci->i_dir_layout.dl_dir_hash, | |
1439 | dn->d_name.name, dn->d_name.len); | |
1440 | } | |
1441 | } | |
1442 | ||
2817b000 SW |
1443 | const struct file_operations ceph_dir_fops = { |
1444 | .read = ceph_read_dir, | |
77acfa29 | 1445 | .iterate = ceph_readdir, |
2817b000 SW |
1446 | .llseek = ceph_dir_llseek, |
1447 | .open = ceph_open, | |
1448 | .release = ceph_release, | |
1449 | .unlocked_ioctl = ceph_ioctl, | |
da819c81 | 1450 | .fsync = ceph_fsync, |
2817b000 SW |
1451 | }; |
1452 | ||
38c48b5f YZ |
1453 | const struct file_operations ceph_snapdir_fops = { |
1454 | .iterate = ceph_readdir, | |
1455 | .llseek = ceph_dir_llseek, | |
1456 | .open = ceph_open, | |
1457 | .release = ceph_release, | |
1458 | }; | |
1459 | ||
2817b000 SW |
1460 | const struct inode_operations ceph_dir_iops = { |
1461 | .lookup = ceph_lookup, | |
1462 | .permission = ceph_permission, | |
1463 | .getattr = ceph_getattr, | |
1464 | .setattr = ceph_setattr, | |
1465 | .setxattr = ceph_setxattr, | |
1466 | .getxattr = ceph_getxattr, | |
1467 | .listxattr = ceph_listxattr, | |
1468 | .removexattr = ceph_removexattr, | |
7221fe4c | 1469 | .get_acl = ceph_get_acl, |
72466d0b | 1470 | .set_acl = ceph_set_acl, |
2817b000 SW |
1471 | .mknod = ceph_mknod, |
1472 | .symlink = ceph_symlink, | |
1473 | .mkdir = ceph_mkdir, | |
1474 | .link = ceph_link, | |
1475 | .unlink = ceph_unlink, | |
1476 | .rmdir = ceph_unlink, | |
1477 | .rename = ceph_rename, | |
1478 | .create = ceph_create, | |
2d83bde9 | 1479 | .atomic_open = ceph_atomic_open, |
2817b000 SW |
1480 | }; |
1481 | ||
38c48b5f YZ |
1482 | const struct inode_operations ceph_snapdir_iops = { |
1483 | .lookup = ceph_lookup, | |
1484 | .permission = ceph_permission, | |
1485 | .getattr = ceph_getattr, | |
1486 | .mkdir = ceph_mkdir, | |
1487 | .rmdir = ceph_unlink, | |
0ea611a3 | 1488 | .rename = ceph_rename, |
38c48b5f YZ |
1489 | }; |
1490 | ||
52dfb8ac | 1491 | const struct dentry_operations ceph_dentry_ops = { |
2817b000 | 1492 | .d_revalidate = ceph_d_revalidate, |
147851d2 | 1493 | .d_release = ceph_d_release, |
b58dc410 | 1494 | .d_prune = ceph_d_prune, |
2817b000 SW |
1495 | }; |
1496 | ||
52dfb8ac | 1497 | const struct dentry_operations ceph_snapdir_dentry_ops = { |
2817b000 | 1498 | .d_revalidate = ceph_snapdir_d_revalidate, |
147851d2 | 1499 | .d_release = ceph_d_release, |
2817b000 SW |
1500 | }; |
1501 | ||
52dfb8ac | 1502 | const struct dentry_operations ceph_snap_dentry_ops = { |
147851d2 | 1503 | .d_release = ceph_d_release, |
b58dc410 | 1504 | .d_prune = ceph_d_prune, |
2817b000 | 1505 | }; |