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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 | 7 | #include <linux/sched.h> |
2cdeb1e4 | 8 | #include <linux/xattr.h> |
2817b000 SW |
9 | |
10 | #include "super.h" | |
3d14c5d2 | 11 | #include "mds_client.h" |
2817b000 SW |
12 | |
13 | /* | |
14 | * Directory operations: readdir, lookup, create, link, unlink, | |
15 | * rename, etc. | |
16 | */ | |
17 | ||
18 | /* | |
19 | * Ceph MDS operations are specified in terms of a base ino and | |
20 | * relative path. Thus, the client can specify an operation on a | |
21 | * specific inode (e.g., a getattr due to fstat(2)), or as a path | |
22 | * relative to, say, the root directory. | |
23 | * | |
24 | * Normally, we limit ourselves to strict inode ops (no path component) | |
25 | * or dentry operations (a single path component relative to an ino). The | |
26 | * exception to this is open_root_dentry(), which will open the mount | |
27 | * point by name. | |
28 | */ | |
29 | ||
52dfb8ac | 30 | const struct dentry_operations ceph_dentry_ops; |
2817b000 SW |
31 | |
32 | /* | |
33 | * Initialize ceph dentry state. | |
34 | */ | |
ad5cb123 | 35 | static int ceph_d_init(struct dentry *dentry) |
2817b000 SW |
36 | { |
37 | struct ceph_dentry_info *di; | |
38 | ||
99ec2697 | 39 | di = kmem_cache_zalloc(ceph_dentry_cachep, GFP_KERNEL); |
2817b000 SW |
40 | if (!di) |
41 | return -ENOMEM; /* oh well */ | |
42 | ||
2817b000 SW |
43 | di->dentry = dentry; |
44 | di->lease_session = NULL; | |
9b16f03c | 45 | di->time = jiffies; |
48d0cbd1 | 46 | dentry->d_fsdata = di; |
2817b000 | 47 | ceph_dentry_lru_add(dentry); |
2817b000 SW |
48 | return 0; |
49 | } | |
50 | ||
2817b000 | 51 | /* |
f3c4ebe6 YZ |
52 | * for f_pos for readdir: |
53 | * - hash order: | |
54 | * (0xff << 52) | ((24 bits hash) << 28) | | |
55 | * (the nth entry has hash collision); | |
56 | * - frag+name order; | |
57 | * ((frag value) << 28) | (the nth entry in frag); | |
2817b000 | 58 | */ |
f3c4ebe6 YZ |
59 | #define OFFSET_BITS 28 |
60 | #define OFFSET_MASK ((1 << OFFSET_BITS) - 1) | |
61 | #define HASH_ORDER (0xffull << (OFFSET_BITS + 24)) | |
62 | loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order) | |
63 | { | |
64 | loff_t fpos = ((loff_t)high << 28) | (loff_t)off; | |
65 | if (hash_order) | |
66 | fpos |= HASH_ORDER; | |
67 | return fpos; | |
68 | } | |
69 | ||
70 | static bool is_hash_order(loff_t p) | |
71 | { | |
72 | return (p & HASH_ORDER) == HASH_ORDER; | |
73 | } | |
74 | ||
2817b000 SW |
75 | static unsigned fpos_frag(loff_t p) |
76 | { | |
f3c4ebe6 | 77 | return p >> OFFSET_BITS; |
2817b000 | 78 | } |
f3c4ebe6 YZ |
79 | |
80 | static unsigned fpos_hash(loff_t p) | |
81 | { | |
82 | return ceph_frag_value(fpos_frag(p)); | |
83 | } | |
84 | ||
2817b000 SW |
85 | static unsigned fpos_off(loff_t p) |
86 | { | |
f3c4ebe6 | 87 | return p & OFFSET_MASK; |
2817b000 SW |
88 | } |
89 | ||
4d5f5df6 YZ |
90 | static int fpos_cmp(loff_t l, loff_t r) |
91 | { | |
92 | int v = ceph_frag_compare(fpos_frag(l), fpos_frag(r)); | |
93 | if (v) | |
94 | return v; | |
95 | return (int)(fpos_off(l) - fpos_off(r)); | |
96 | } | |
97 | ||
fdd4e158 YZ |
98 | /* |
99 | * make note of the last dentry we read, so we can | |
100 | * continue at the same lexicographical point, | |
101 | * regardless of what dir changes take place on the | |
102 | * server. | |
103 | */ | |
104 | static int note_last_dentry(struct ceph_file_info *fi, const char *name, | |
105 | int len, unsigned next_offset) | |
106 | { | |
107 | char *buf = kmalloc(len+1, GFP_KERNEL); | |
108 | if (!buf) | |
109 | return -ENOMEM; | |
110 | kfree(fi->last_name); | |
111 | fi->last_name = buf; | |
112 | memcpy(fi->last_name, name, len); | |
113 | fi->last_name[len] = 0; | |
114 | fi->next_offset = next_offset; | |
115 | dout("note_last_dentry '%s'\n", fi->last_name); | |
116 | return 0; | |
117 | } | |
118 | ||
c530cd24 YZ |
119 | |
120 | static struct dentry * | |
121 | __dcache_find_get_entry(struct dentry *parent, u64 idx, | |
122 | struct ceph_readdir_cache_control *cache_ctl) | |
123 | { | |
124 | struct inode *dir = d_inode(parent); | |
125 | struct dentry *dentry; | |
126 | unsigned idx_mask = (PAGE_SIZE / sizeof(struct dentry *)) - 1; | |
127 | loff_t ptr_pos = idx * sizeof(struct dentry *); | |
128 | pgoff_t ptr_pgoff = ptr_pos >> PAGE_SHIFT; | |
129 | ||
130 | if (ptr_pos >= i_size_read(dir)) | |
131 | return NULL; | |
132 | ||
133 | if (!cache_ctl->page || ptr_pgoff != page_index(cache_ctl->page)) { | |
134 | ceph_readdir_cache_release(cache_ctl); | |
135 | cache_ctl->page = find_lock_page(&dir->i_data, ptr_pgoff); | |
136 | if (!cache_ctl->page) { | |
137 | dout(" page %lu not found\n", ptr_pgoff); | |
138 | return ERR_PTR(-EAGAIN); | |
139 | } | |
140 | /* reading/filling the cache are serialized by | |
141 | i_mutex, no need to use page lock */ | |
142 | unlock_page(cache_ctl->page); | |
143 | cache_ctl->dentries = kmap(cache_ctl->page); | |
144 | } | |
145 | ||
146 | cache_ctl->index = idx & idx_mask; | |
147 | ||
148 | rcu_read_lock(); | |
149 | spin_lock(&parent->d_lock); | |
150 | /* check i_size again here, because empty directory can be | |
151 | * marked as complete while not holding the i_mutex. */ | |
152 | if (ceph_dir_is_complete_ordered(dir) && ptr_pos < i_size_read(dir)) | |
153 | dentry = cache_ctl->dentries[cache_ctl->index]; | |
154 | else | |
155 | dentry = NULL; | |
156 | spin_unlock(&parent->d_lock); | |
157 | if (dentry && !lockref_get_not_dead(&dentry->d_lockref)) | |
158 | dentry = NULL; | |
159 | rcu_read_unlock(); | |
160 | return dentry ? : ERR_PTR(-EAGAIN); | |
161 | } | |
162 | ||
2817b000 SW |
163 | /* |
164 | * When possible, we try to satisfy a readdir by peeking at the | |
165 | * dcache. We make this work by carefully ordering dentries on | |
946e51f2 | 166 | * d_child when we initially get results back from the MDS, and |
2817b000 SW |
167 | * falling back to a "normal" sync readdir if any dentries in the dir |
168 | * are dropped. | |
169 | * | |
2f276c51 | 170 | * Complete dir indicates that we have all dentries in the dir. It is |
2817b000 SW |
171 | * defined IFF we hold CEPH_CAP_FILE_SHARED (which will be revoked by |
172 | * the MDS if/when the directory is modified). | |
173 | */ | |
a30be7cb YZ |
174 | static int __dcache_readdir(struct file *file, struct dir_context *ctx, |
175 | u32 shared_gen) | |
2817b000 | 176 | { |
77acfa29 | 177 | struct ceph_file_info *fi = file->private_data; |
b583043e | 178 | struct dentry *parent = file->f_path.dentry; |
2b0143b5 | 179 | struct inode *dir = d_inode(parent); |
fdd4e158 | 180 | struct dentry *dentry, *last = NULL; |
2817b000 | 181 | struct ceph_dentry_info *di; |
fdd4e158 | 182 | struct ceph_readdir_cache_control cache_ctl = {}; |
c530cd24 YZ |
183 | u64 idx = 0; |
184 | int err = 0; | |
2817b000 | 185 | |
f3c4ebe6 | 186 | dout("__dcache_readdir %p v%u at %llx\n", dir, shared_gen, ctx->pos); |
2817b000 | 187 | |
c530cd24 YZ |
188 | /* search start position */ |
189 | if (ctx->pos > 2) { | |
190 | u64 count = div_u64(i_size_read(dir), sizeof(struct dentry *)); | |
191 | while (count > 0) { | |
192 | u64 step = count >> 1; | |
193 | dentry = __dcache_find_get_entry(parent, idx + step, | |
194 | &cache_ctl); | |
195 | if (!dentry) { | |
196 | /* use linar search */ | |
197 | idx = 0; | |
198 | break; | |
199 | } | |
200 | if (IS_ERR(dentry)) { | |
201 | err = PTR_ERR(dentry); | |
202 | goto out; | |
203 | } | |
204 | di = ceph_dentry(dentry); | |
205 | spin_lock(&dentry->d_lock); | |
206 | if (fpos_cmp(di->offset, ctx->pos) < 0) { | |
207 | idx += step + 1; | |
208 | count -= step + 1; | |
209 | } else { | |
210 | count = step; | |
211 | } | |
212 | spin_unlock(&dentry->d_lock); | |
213 | dput(dentry); | |
214 | } | |
2817b000 | 215 | |
c530cd24 | 216 | dout("__dcache_readdir %p cache idx %llu\n", dir, idx); |
2817b000 SW |
217 | } |
218 | ||
fdd4e158 | 219 | |
c530cd24 YZ |
220 | for (;;) { |
221 | bool emit_dentry = false; | |
222 | dentry = __dcache_find_get_entry(parent, idx++, &cache_ctl); | |
223 | if (!dentry) { | |
9cfa1098 | 224 | fi->flags |= CEPH_F_ATEND; |
fdd4e158 YZ |
225 | err = 0; |
226 | break; | |
2817b000 | 227 | } |
c530cd24 YZ |
228 | if (IS_ERR(dentry)) { |
229 | err = PTR_ERR(dentry); | |
230 | goto out; | |
fdd4e158 YZ |
231 | } |
232 | ||
fdd4e158 YZ |
233 | di = ceph_dentry(dentry); |
234 | spin_lock(&dentry->d_lock); | |
a30be7cb | 235 | if (di->lease_shared_gen == shared_gen && |
fdd4e158 | 236 | d_really_is_positive(dentry) && |
fdd4e158 YZ |
237 | fpos_cmp(ctx->pos, di->offset) <= 0) { |
238 | emit_dentry = true; | |
239 | } | |
da502956 | 240 | spin_unlock(&dentry->d_lock); |
2817b000 | 241 | |
fdd4e158 | 242 | if (emit_dentry) { |
f3c4ebe6 | 243 | dout(" %llx dentry %p %pd %p\n", di->offset, |
fdd4e158 YZ |
244 | dentry, dentry, d_inode(dentry)); |
245 | ctx->pos = di->offset; | |
246 | if (!dir_emit(ctx, dentry->d_name.name, | |
247 | dentry->d_name.len, | |
248 | ceph_translate_ino(dentry->d_sb, | |
249 | d_inode(dentry)->i_ino), | |
250 | d_inode(dentry)->i_mode >> 12)) { | |
251 | dput(dentry); | |
252 | err = 0; | |
253 | break; | |
254 | } | |
255 | ctx->pos++; | |
0081bd83 | 256 | |
fdd4e158 YZ |
257 | if (last) |
258 | dput(last); | |
259 | last = dentry; | |
260 | } else { | |
261 | dput(dentry); | |
2817b000 | 262 | } |
fdd4e158 | 263 | } |
c530cd24 | 264 | out: |
fdd4e158 YZ |
265 | ceph_readdir_cache_release(&cache_ctl); |
266 | if (last) { | |
267 | int ret; | |
268 | di = ceph_dentry(last); | |
269 | ret = note_last_dentry(fi, last->d_name.name, last->d_name.len, | |
270 | fpos_off(di->offset) + 1); | |
271 | if (ret < 0) | |
272 | err = ret; | |
2817b000 | 273 | dput(last); |
84583cfb YZ |
274 | /* last_name no longer match cache index */ |
275 | if (fi->readdir_cache_idx >= 0) { | |
276 | fi->readdir_cache_idx = -1; | |
277 | fi->dir_release_count = 0; | |
278 | } | |
fdd4e158 | 279 | } |
2817b000 SW |
280 | return err; |
281 | } | |
282 | ||
f3c4ebe6 YZ |
283 | static bool need_send_readdir(struct ceph_file_info *fi, loff_t pos) |
284 | { | |
285 | if (!fi->last_readdir) | |
286 | return true; | |
287 | if (is_hash_order(pos)) | |
288 | return !ceph_frag_contains_value(fi->frag, fpos_hash(pos)); | |
289 | else | |
290 | return fi->frag != fpos_frag(pos); | |
291 | } | |
292 | ||
77acfa29 | 293 | static int ceph_readdir(struct file *file, struct dir_context *ctx) |
2817b000 | 294 | { |
77acfa29 AV |
295 | struct ceph_file_info *fi = file->private_data; |
296 | struct inode *inode = file_inode(file); | |
2817b000 | 297 | struct ceph_inode_info *ci = ceph_inode(inode); |
3d14c5d2 YS |
298 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
299 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
8974eebd | 300 | int i; |
2817b000 | 301 | int err; |
b50c2de5 | 302 | unsigned frag = -1; |
2817b000 | 303 | struct ceph_mds_reply_info_parsed *rinfo; |
2817b000 | 304 | |
8974eebd | 305 | dout("readdir %p file %p pos %llx\n", inode, file, ctx->pos); |
9cfa1098 | 306 | if (fi->flags & CEPH_F_ATEND) |
2817b000 SW |
307 | return 0; |
308 | ||
309 | /* always start with . and .. */ | |
77acfa29 | 310 | if (ctx->pos == 0) { |
2817b000 | 311 | dout("readdir off 0 -> '.'\n"); |
77acfa29 | 312 | if (!dir_emit(ctx, ".", 1, |
ad1fee96 | 313 | ceph_translate_ino(inode->i_sb, inode->i_ino), |
77acfa29 | 314 | inode->i_mode >> 12)) |
2817b000 | 315 | return 0; |
77acfa29 | 316 | ctx->pos = 1; |
2817b000 | 317 | } |
77acfa29 | 318 | if (ctx->pos == 1) { |
b583043e | 319 | ino_t ino = parent_ino(file->f_path.dentry); |
2817b000 | 320 | dout("readdir off 1 -> '..'\n"); |
77acfa29 | 321 | if (!dir_emit(ctx, "..", 2, |
ad1fee96 | 322 | ceph_translate_ino(inode->i_sb, ino), |
77acfa29 | 323 | inode->i_mode >> 12)) |
2817b000 | 324 | return 0; |
77acfa29 | 325 | ctx->pos = 2; |
2817b000 SW |
326 | } |
327 | ||
328 | /* can we use the dcache? */ | |
be655596 | 329 | spin_lock(&ci->i_ceph_lock); |
fdd4e158 | 330 | if (ceph_test_mount_opt(fsc, DCACHE) && |
3d14c5d2 | 331 | !ceph_test_mount_opt(fsc, NOASYNCREADDIR) && |
a0dff78d | 332 | ceph_snap(inode) != CEPH_SNAPDIR && |
70db4f36 | 333 | __ceph_dir_is_complete_ordered(ci) && |
2817b000 | 334 | __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) { |
a30be7cb | 335 | u32 shared_gen = ci->i_shared_gen; |
be655596 | 336 | spin_unlock(&ci->i_ceph_lock); |
a30be7cb | 337 | err = __dcache_readdir(file, ctx, shared_gen); |
efa4c120 | 338 | if (err != -EAGAIN) |
2817b000 | 339 | return err; |
efa4c120 | 340 | } else { |
be655596 | 341 | spin_unlock(&ci->i_ceph_lock); |
2817b000 | 342 | } |
2817b000 SW |
343 | |
344 | /* proceed with a normal readdir */ | |
2817b000 SW |
345 | more: |
346 | /* do we have the correct frag content buffered? */ | |
f3c4ebe6 | 347 | if (need_send_readdir(fi, ctx->pos)) { |
2817b000 SW |
348 | struct ceph_mds_request *req; |
349 | int op = ceph_snap(inode) == CEPH_SNAPDIR ? | |
350 | CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR; | |
351 | ||
352 | /* discard old result, if any */ | |
393f6620 | 353 | if (fi->last_readdir) { |
2817b000 | 354 | ceph_mdsc_put_request(fi->last_readdir); |
393f6620 SW |
355 | fi->last_readdir = NULL; |
356 | } | |
2817b000 | 357 | |
f3c4ebe6 | 358 | if (is_hash_order(ctx->pos)) { |
b50c2de5 YZ |
359 | /* fragtree isn't always accurate. choose frag |
360 | * based on previous reply when possible. */ | |
361 | if (frag == (unsigned)-1) | |
362 | frag = ceph_choose_frag(ci, fpos_hash(ctx->pos), | |
363 | NULL, NULL); | |
f3c4ebe6 YZ |
364 | } else { |
365 | frag = fpos_frag(ctx->pos); | |
366 | } | |
367 | ||
2817b000 SW |
368 | dout("readdir fetching %llx.%llx frag %x offset '%s'\n", |
369 | ceph_vinop(inode), frag, fi->last_name); | |
370 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); | |
371 | if (IS_ERR(req)) | |
372 | return PTR_ERR(req); | |
54008399 YZ |
373 | err = ceph_alloc_readdir_reply_buffer(req, inode); |
374 | if (err) { | |
375 | ceph_mdsc_put_request(req); | |
376 | return err; | |
377 | } | |
2817b000 SW |
378 | /* hints to request -> mds selection code */ |
379 | req->r_direct_mode = USE_AUTH_MDS; | |
5d37ca14 YZ |
380 | if (op == CEPH_MDS_OP_READDIR) { |
381 | req->r_direct_hash = ceph_frag_value(frag); | |
382 | __set_bit(CEPH_MDS_R_DIRECT_IS_HASH, &req->r_req_flags); | |
383 | } | |
a149bb9a | 384 | if (fi->last_name) { |
687265e5 | 385 | req->r_path2 = kstrdup(fi->last_name, GFP_KERNEL); |
a149bb9a SK |
386 | if (!req->r_path2) { |
387 | ceph_mdsc_put_request(req); | |
388 | return -ENOMEM; | |
389 | } | |
79162547 YZ |
390 | } else if (is_hash_order(ctx->pos)) { |
391 | req->r_args.readdir.offset_hash = | |
392 | cpu_to_le32(fpos_hash(ctx->pos)); | |
a149bb9a | 393 | } |
79162547 | 394 | |
fdd4e158 YZ |
395 | req->r_dir_release_cnt = fi->dir_release_count; |
396 | req->r_dir_ordered_cnt = fi->dir_ordered_count; | |
397 | req->r_readdir_cache_idx = fi->readdir_cache_idx; | |
2817b000 SW |
398 | req->r_readdir_offset = fi->next_offset; |
399 | req->r_args.readdir.frag = cpu_to_le32(frag); | |
956d39d6 YZ |
400 | req->r_args.readdir.flags = |
401 | cpu_to_le16(CEPH_READDIR_REPLY_BITFLAGS); | |
a149bb9a SK |
402 | |
403 | req->r_inode = inode; | |
404 | ihold(inode); | |
405 | req->r_dentry = dget(file->f_path.dentry); | |
2817b000 SW |
406 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
407 | if (err < 0) { | |
408 | ceph_mdsc_put_request(req); | |
409 | return err; | |
410 | } | |
f3c4ebe6 YZ |
411 | dout("readdir got and parsed readdir result=%d on " |
412 | "frag %x, end=%d, complete=%d, hash_order=%d\n", | |
413 | err, frag, | |
2817b000 | 414 | (int)req->r_reply_info.dir_end, |
f3c4ebe6 YZ |
415 | (int)req->r_reply_info.dir_complete, |
416 | (int)req->r_reply_info.hash_order); | |
2817b000 | 417 | |
81c6aea5 YZ |
418 | rinfo = &req->r_reply_info; |
419 | if (le32_to_cpu(rinfo->dir_dir->frag) != frag) { | |
420 | frag = le32_to_cpu(rinfo->dir_dir->frag); | |
f3c4ebe6 YZ |
421 | if (!rinfo->hash_order) { |
422 | fi->next_offset = req->r_readdir_offset; | |
423 | /* adjust ctx->pos to beginning of frag */ | |
424 | ctx->pos = ceph_make_fpos(frag, | |
425 | fi->next_offset, | |
426 | false); | |
427 | } | |
81c6aea5 | 428 | } |
fdd4e158 | 429 | |
f0494206 | 430 | fi->frag = frag; |
2817b000 SW |
431 | fi->last_readdir = req; |
432 | ||
bc2de10d | 433 | if (test_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags)) { |
fdd4e158 YZ |
434 | fi->readdir_cache_idx = req->r_readdir_cache_idx; |
435 | if (fi->readdir_cache_idx < 0) { | |
436 | /* preclude from marking dir ordered */ | |
437 | fi->dir_ordered_count = 0; | |
8974eebd YZ |
438 | } else if (ceph_frag_is_leftmost(frag) && |
439 | fi->next_offset == 2) { | |
fdd4e158 YZ |
440 | /* note dir version at start of readdir so |
441 | * we can tell if any dentries get dropped */ | |
442 | fi->dir_release_count = req->r_dir_release_cnt; | |
443 | fi->dir_ordered_count = req->r_dir_ordered_cnt; | |
444 | } | |
445 | } else { | |
446 | dout("readdir !did_prepopulate"); | |
447 | /* disable readdir cache */ | |
448 | fi->readdir_cache_idx = -1; | |
449 | /* preclude from marking dir complete */ | |
450 | fi->dir_release_count = 0; | |
451 | } | |
452 | ||
f3c4ebe6 YZ |
453 | /* note next offset and last dentry name */ |
454 | if (rinfo->dir_nr > 0) { | |
2a5beea3 YZ |
455 | struct ceph_mds_reply_dir_entry *rde = |
456 | rinfo->dir_entries + (rinfo->dir_nr-1); | |
f3c4ebe6 YZ |
457 | unsigned next_offset = req->r_reply_info.dir_end ? |
458 | 2 : (fpos_off(rde->offset) + 1); | |
2a5beea3 | 459 | err = note_last_dentry(fi, rde->name, rde->name_len, |
f3c4ebe6 | 460 | next_offset); |
2817b000 SW |
461 | if (err) |
462 | return err; | |
f3c4ebe6 YZ |
463 | } else if (req->r_reply_info.dir_end) { |
464 | fi->next_offset = 2; | |
465 | /* keep last name */ | |
2817b000 SW |
466 | } |
467 | } | |
468 | ||
469 | rinfo = &fi->last_readdir->r_reply_info; | |
8974eebd | 470 | dout("readdir frag %x num %d pos %llx chunk first %llx\n", |
f3c4ebe6 | 471 | fi->frag, rinfo->dir_nr, ctx->pos, |
8974eebd | 472 | rinfo->dir_nr ? rinfo->dir_entries[0].offset : 0LL); |
77acfa29 | 473 | |
8974eebd YZ |
474 | i = 0; |
475 | /* search start position */ | |
476 | if (rinfo->dir_nr > 0) { | |
477 | int step, nr = rinfo->dir_nr; | |
478 | while (nr > 0) { | |
479 | step = nr >> 1; | |
480 | if (rinfo->dir_entries[i + step].offset < ctx->pos) { | |
481 | i += step + 1; | |
482 | nr -= step + 1; | |
483 | } else { | |
484 | nr = step; | |
485 | } | |
486 | } | |
487 | } | |
488 | for (; i < rinfo->dir_nr; i++) { | |
489 | struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; | |
3105c19c SW |
490 | struct ceph_vino vino; |
491 | ino_t ino; | |
b50c2de5 | 492 | u32 ftype; |
3105c19c | 493 | |
8974eebd YZ |
494 | BUG_ON(rde->offset < ctx->pos); |
495 | ||
496 | ctx->pos = rde->offset; | |
497 | dout("readdir (%d/%d) -> %llx '%.*s' %p\n", | |
498 | i, rinfo->dir_nr, ctx->pos, | |
2a5beea3 | 499 | rde->name_len, rde->name, &rde->inode.in); |
8974eebd | 500 | |
2a5beea3 YZ |
501 | BUG_ON(!rde->inode.in); |
502 | ftype = le32_to_cpu(rde->inode.in->mode) >> 12; | |
503 | vino.ino = le64_to_cpu(rde->inode.in->ino); | |
504 | vino.snap = le64_to_cpu(rde->inode.in->snapid); | |
3105c19c | 505 | ino = ceph_vino_to_ino(vino); |
8974eebd | 506 | |
2a5beea3 YZ |
507 | if (!dir_emit(ctx, rde->name, rde->name_len, |
508 | ceph_translate_ino(inode->i_sb, ino), ftype)) { | |
2817b000 SW |
509 | dout("filldir stopping us...\n"); |
510 | return 0; | |
511 | } | |
77acfa29 | 512 | ctx->pos++; |
2817b000 SW |
513 | } |
514 | ||
b50c2de5 YZ |
515 | ceph_mdsc_put_request(fi->last_readdir); |
516 | fi->last_readdir = NULL; | |
517 | ||
f3c4ebe6 | 518 | if (fi->next_offset > 2) { |
b50c2de5 | 519 | frag = fi->frag; |
2817b000 SW |
520 | goto more; |
521 | } | |
522 | ||
523 | /* more frags? */ | |
f3c4ebe6 | 524 | if (!ceph_frag_is_rightmost(fi->frag)) { |
b50c2de5 | 525 | frag = ceph_frag_next(fi->frag); |
f3c4ebe6 YZ |
526 | if (is_hash_order(ctx->pos)) { |
527 | loff_t new_pos = ceph_make_fpos(ceph_frag_value(frag), | |
528 | fi->next_offset, true); | |
529 | if (new_pos > ctx->pos) | |
530 | ctx->pos = new_pos; | |
531 | /* keep last_name */ | |
532 | } else { | |
533 | ctx->pos = ceph_make_fpos(frag, fi->next_offset, false); | |
534 | kfree(fi->last_name); | |
535 | fi->last_name = NULL; | |
536 | } | |
2817b000 SW |
537 | dout("readdir next frag is %x\n", frag); |
538 | goto more; | |
539 | } | |
9cfa1098 | 540 | fi->flags |= CEPH_F_ATEND; |
2817b000 SW |
541 | |
542 | /* | |
543 | * if dir_release_count still matches the dir, no dentries | |
544 | * were released during the whole readdir, and we should have | |
545 | * the complete dir contents in our cache. | |
546 | */ | |
fdd4e158 YZ |
547 | if (atomic64_read(&ci->i_release_count) == fi->dir_release_count) { |
548 | spin_lock(&ci->i_ceph_lock); | |
549 | if (fi->dir_ordered_count == atomic64_read(&ci->i_ordered_count)) { | |
70db4f36 | 550 | dout(" marking %p complete and ordered\n", inode); |
fdd4e158 YZ |
551 | /* use i_size to track number of entries in |
552 | * readdir cache */ | |
553 | BUG_ON(fi->readdir_cache_idx < 0); | |
554 | i_size_write(inode, fi->readdir_cache_idx * | |
555 | sizeof(struct dentry*)); | |
556 | } else { | |
70db4f36 | 557 | dout(" marking %p complete\n", inode); |
fdd4e158 | 558 | } |
70db4f36 YZ |
559 | __ceph_dir_set_complete(ci, fi->dir_release_count, |
560 | fi->dir_ordered_count); | |
fdd4e158 | 561 | spin_unlock(&ci->i_ceph_lock); |
2817b000 | 562 | } |
2817b000 | 563 | |
77acfa29 | 564 | dout("readdir %p file %p done.\n", inode, file); |
2817b000 SW |
565 | return 0; |
566 | } | |
567 | ||
8974eebd | 568 | static void reset_readdir(struct ceph_file_info *fi) |
2817b000 SW |
569 | { |
570 | if (fi->last_readdir) { | |
571 | ceph_mdsc_put_request(fi->last_readdir); | |
572 | fi->last_readdir = NULL; | |
573 | } | |
574 | kfree(fi->last_name); | |
a1629c3b | 575 | fi->last_name = NULL; |
fdd4e158 YZ |
576 | fi->dir_release_count = 0; |
577 | fi->readdir_cache_idx = -1; | |
a78600e7 | 578 | fi->next_offset = 2; /* compensate for . and .. */ |
9cfa1098 | 579 | fi->flags &= ~CEPH_F_ATEND; |
2817b000 SW |
580 | } |
581 | ||
8974eebd YZ |
582 | /* |
583 | * discard buffered readdir content on seekdir(0), or seek to new frag, | |
584 | * or seek prior to current chunk | |
585 | */ | |
586 | static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos) | |
587 | { | |
588 | struct ceph_mds_reply_info_parsed *rinfo; | |
f3c4ebe6 | 589 | loff_t chunk_offset; |
8974eebd YZ |
590 | if (new_pos == 0) |
591 | return true; | |
f3c4ebe6 YZ |
592 | if (is_hash_order(new_pos)) { |
593 | /* no need to reset last_name for a forward seek when | |
594 | * dentries are sotred in hash order */ | |
0f5aa88a | 595 | } else if (fi->frag != fpos_frag(new_pos)) { |
8974eebd | 596 | return true; |
f3c4ebe6 | 597 | } |
8974eebd YZ |
598 | rinfo = fi->last_readdir ? &fi->last_readdir->r_reply_info : NULL; |
599 | if (!rinfo || !rinfo->dir_nr) | |
600 | return true; | |
f3c4ebe6 YZ |
601 | chunk_offset = rinfo->dir_entries[0].offset; |
602 | return new_pos < chunk_offset || | |
603 | is_hash_order(new_pos) != is_hash_order(chunk_offset); | |
8974eebd YZ |
604 | } |
605 | ||
965c8e59 | 606 | static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence) |
2817b000 SW |
607 | { |
608 | struct ceph_file_info *fi = file->private_data; | |
609 | struct inode *inode = file->f_mapping->host; | |
2817b000 SW |
610 | loff_t retval; |
611 | ||
5955102c | 612 | inode_lock(inode); |
06222e49 | 613 | retval = -EINVAL; |
965c8e59 | 614 | switch (whence) { |
2817b000 SW |
615 | case SEEK_CUR: |
616 | offset += file->f_pos; | |
06222e49 JB |
617 | case SEEK_SET: |
618 | break; | |
fdd4e158 YZ |
619 | case SEEK_END: |
620 | retval = -EOPNOTSUPP; | |
06222e49 JB |
621 | default: |
622 | goto out; | |
2817b000 | 623 | } |
06222e49 | 624 | |
f0494206 | 625 | if (offset >= 0) { |
f3c4ebe6 YZ |
626 | if (need_reset_readdir(fi, offset)) { |
627 | dout("dir_llseek dropping %p content\n", file); | |
628 | reset_readdir(fi); | |
629 | } else if (is_hash_order(offset) && offset > file->f_pos) { | |
630 | /* for hash offset, we don't know if a forward seek | |
631 | * is within same frag */ | |
632 | fi->dir_release_count = 0; | |
633 | fi->readdir_cache_idx = -1; | |
634 | } | |
635 | ||
2817b000 SW |
636 | if (offset != file->f_pos) { |
637 | file->f_pos = offset; | |
638 | file->f_version = 0; | |
9cfa1098 | 639 | fi->flags &= ~CEPH_F_ATEND; |
2817b000 SW |
640 | } |
641 | retval = offset; | |
2817b000 | 642 | } |
06222e49 | 643 | out: |
5955102c | 644 | inode_unlock(inode); |
2817b000 SW |
645 | return retval; |
646 | } | |
647 | ||
648 | /* | |
468640e3 | 649 | * Handle lookups for the hidden .snap directory. |
2817b000 | 650 | */ |
468640e3 SW |
651 | int ceph_handle_snapdir(struct ceph_mds_request *req, |
652 | struct dentry *dentry, int err) | |
2817b000 | 653 | { |
3d14c5d2 | 654 | struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); |
2b0143b5 | 655 | struct inode *parent = d_inode(dentry->d_parent); /* we hold i_mutex */ |
2817b000 SW |
656 | |
657 | /* .snap dir? */ | |
658 | if (err == -ENOENT && | |
455cec0a | 659 | ceph_snap(parent) == CEPH_NOSNAP && |
6b805185 | 660 | strcmp(dentry->d_name.name, |
3d14c5d2 | 661 | fsc->mount_options->snapdir_name) == 0) { |
2817b000 | 662 | struct inode *inode = ceph_get_snapdir(parent); |
a455589f AV |
663 | dout("ENOENT on snapdir %p '%pd', linking to snapdir %p\n", |
664 | dentry, dentry, inode); | |
9358c6d4 | 665 | BUG_ON(!d_unhashed(dentry)); |
2817b000 SW |
666 | d_add(dentry, inode); |
667 | err = 0; | |
668 | } | |
468640e3 SW |
669 | return err; |
670 | } | |
2817b000 | 671 | |
468640e3 SW |
672 | /* |
673 | * Figure out final result of a lookup/open request. | |
674 | * | |
675 | * Mainly, make sure we return the final req->r_dentry (if it already | |
676 | * existed) in place of the original VFS-provided dentry when they | |
677 | * differ. | |
678 | * | |
679 | * Gracefully handle the case where the MDS replies with -ENOENT and | |
680 | * no trace (which it may do, at its discretion, e.g., if it doesn't | |
681 | * care to issue a lease on the negative dentry). | |
682 | */ | |
683 | struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, | |
684 | struct dentry *dentry, int err) | |
685 | { | |
2817b000 SW |
686 | if (err == -ENOENT) { |
687 | /* no trace? */ | |
688 | err = 0; | |
689 | if (!req->r_reply_info.head->is_dentry) { | |
690 | dout("ENOENT and no trace, dentry %p inode %p\n", | |
2b0143b5 DH |
691 | dentry, d_inode(dentry)); |
692 | if (d_really_is_positive(dentry)) { | |
2817b000 SW |
693 | d_drop(dentry); |
694 | err = -ENOENT; | |
695 | } else { | |
696 | d_add(dentry, NULL); | |
697 | } | |
698 | } | |
699 | } | |
700 | if (err) | |
701 | dentry = ERR_PTR(err); | |
702 | else if (dentry != req->r_dentry) | |
703 | dentry = dget(req->r_dentry); /* we got spliced */ | |
704 | else | |
705 | dentry = NULL; | |
706 | return dentry; | |
707 | } | |
708 | ||
3b33f692 | 709 | static bool is_root_ceph_dentry(struct inode *inode, struct dentry *dentry) |
1d1de916 SW |
710 | { |
711 | return ceph_ino(inode) == CEPH_INO_ROOT && | |
712 | strncmp(dentry->d_name.name, ".ceph", 5) == 0; | |
713 | } | |
714 | ||
2817b000 SW |
715 | /* |
716 | * Look up a single dir entry. If there is a lookup intent, inform | |
717 | * the MDS so that it gets our 'caps wanted' value in a single op. | |
718 | */ | |
719 | static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry, | |
00cd8dd3 | 720 | unsigned int flags) |
2817b000 | 721 | { |
3d14c5d2 YS |
722 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
723 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
724 | struct ceph_mds_request *req; |
725 | int op; | |
315f2408 | 726 | int mask; |
2817b000 SW |
727 | int err; |
728 | ||
a455589f AV |
729 | dout("lookup %p dentry %p '%pd'\n", |
730 | dir, dentry, dentry); | |
2817b000 SW |
731 | |
732 | if (dentry->d_name.len > NAME_MAX) | |
733 | return ERR_PTR(-ENAMETOOLONG); | |
734 | ||
2817b000 | 735 | /* can we conclude ENOENT locally? */ |
2b0143b5 | 736 | if (d_really_is_negative(dentry)) { |
2817b000 SW |
737 | struct ceph_inode_info *ci = ceph_inode(dir); |
738 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
739 | ||
be655596 | 740 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
741 | dout(" dir %p flags are %d\n", dir, ci->i_ceph_flags); |
742 | if (strncmp(dentry->d_name.name, | |
3d14c5d2 | 743 | fsc->mount_options->snapdir_name, |
2817b000 | 744 | dentry->d_name.len) && |
1d1de916 | 745 | !is_root_ceph_dentry(dir, dentry) && |
e2c3de04 | 746 | ceph_test_mount_opt(fsc, DCACHE) && |
2f276c51 | 747 | __ceph_dir_is_complete(ci) && |
2817b000 | 748 | (__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) { |
be655596 | 749 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
750 | dout(" dir %p complete, -ENOENT\n", dir); |
751 | d_add(dentry, NULL); | |
752 | di->lease_shared_gen = ci->i_shared_gen; | |
753 | return NULL; | |
754 | } | |
be655596 | 755 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
756 | } |
757 | ||
758 | op = ceph_snap(dir) == CEPH_SNAPDIR ? | |
759 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; | |
760 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); | |
761 | if (IS_ERR(req)) | |
7e34bc52 | 762 | return ERR_CAST(req); |
2817b000 SW |
763 | req->r_dentry = dget(dentry); |
764 | req->r_num_caps = 2; | |
315f2408 YZ |
765 | |
766 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
767 | if (ceph_security_xattr_wanted(dir)) | |
768 | mask |= CEPH_CAP_XATTR_SHARED; | |
769 | req->r_args.getattr.mask = cpu_to_le32(mask); | |
770 | ||
3dd69aab JL |
771 | req->r_parent = dir; |
772 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); | |
2817b000 | 773 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
468640e3 | 774 | err = ceph_handle_snapdir(req, dentry, err); |
2817b000 SW |
775 | dentry = ceph_finish_lookup(req, dentry, err); |
776 | ceph_mdsc_put_request(req); /* will dput(dentry) */ | |
777 | dout("lookup result=%p\n", dentry); | |
778 | return dentry; | |
779 | } | |
780 | ||
781 | /* | |
782 | * If we do a create but get no trace back from the MDS, follow up with | |
783 | * a lookup (the VFS expects us to link up the provided dentry). | |
784 | */ | |
785 | int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry) | |
786 | { | |
00cd8dd3 | 787 | struct dentry *result = ceph_lookup(dir, dentry, 0); |
2817b000 SW |
788 | |
789 | if (result && !IS_ERR(result)) { | |
790 | /* | |
791 | * We created the item, then did a lookup, and found | |
792 | * it was already linked to another inode we already | |
4d41cef2 YZ |
793 | * had in our cache (and thus got spliced). To not |
794 | * confuse VFS (especially when inode is a directory), | |
795 | * we don't link our dentry to that inode, return an | |
796 | * error instead. | |
797 | * | |
798 | * This event should be rare and it happens only when | |
799 | * we talk to old MDS. Recent MDS does not send traceless | |
800 | * reply for request that creates new inode. | |
2817b000 | 801 | */ |
5cba372c | 802 | d_drop(result); |
4d41cef2 | 803 | return -ESTALE; |
2817b000 SW |
804 | } |
805 | return PTR_ERR(result); | |
806 | } | |
807 | ||
808 | static int ceph_mknod(struct inode *dir, struct dentry *dentry, | |
1a67aafb | 809 | umode_t mode, dev_t rdev) |
2817b000 | 810 | { |
3d14c5d2 YS |
811 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
812 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 813 | struct ceph_mds_request *req; |
b1ee94aa | 814 | struct ceph_acls_info acls = {}; |
2817b000 SW |
815 | int err; |
816 | ||
817 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
818 | return -EROFS; | |
819 | ||
b1ee94aa YZ |
820 | err = ceph_pre_init_acls(dir, &mode, &acls); |
821 | if (err < 0) | |
822 | return err; | |
823 | ||
1a67aafb | 824 | dout("mknod in dir %p dentry %p mode 0%ho rdev %d\n", |
2817b000 SW |
825 | dir, dentry, mode, rdev); |
826 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS); | |
827 | if (IS_ERR(req)) { | |
b1ee94aa YZ |
828 | err = PTR_ERR(req); |
829 | goto out; | |
2817b000 SW |
830 | } |
831 | req->r_dentry = dget(dentry); | |
832 | req->r_num_caps = 2; | |
3dd69aab JL |
833 | req->r_parent = dir; |
834 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); | |
2817b000 SW |
835 | req->r_args.mknod.mode = cpu_to_le32(mode); |
836 | req->r_args.mknod.rdev = cpu_to_le32(rdev); | |
837 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
838 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
b1ee94aa YZ |
839 | if (acls.pagelist) { |
840 | req->r_pagelist = acls.pagelist; | |
841 | acls.pagelist = NULL; | |
842 | } | |
2817b000 SW |
843 | err = ceph_mdsc_do_request(mdsc, dir, req); |
844 | if (!err && !req->r_reply_info.head->is_dentry) | |
845 | err = ceph_handle_notrace_create(dir, dentry); | |
846 | ceph_mdsc_put_request(req); | |
b1ee94aa | 847 | out: |
7221fe4c | 848 | if (!err) |
2b0143b5 | 849 | ceph_init_inode_acls(d_inode(dentry), &acls); |
b20a95a0 | 850 | else |
2817b000 | 851 | d_drop(dentry); |
b1ee94aa | 852 | ceph_release_acls_info(&acls); |
2817b000 SW |
853 | return err; |
854 | } | |
855 | ||
4acdaf27 | 856 | static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 857 | bool excl) |
2817b000 | 858 | { |
2d83bde9 | 859 | return ceph_mknod(dir, dentry, mode, 0); |
2817b000 SW |
860 | } |
861 | ||
862 | static int ceph_symlink(struct inode *dir, struct dentry *dentry, | |
863 | const char *dest) | |
864 | { | |
3d14c5d2 YS |
865 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
866 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
867 | struct ceph_mds_request *req; |
868 | int err; | |
869 | ||
870 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
871 | return -EROFS; | |
872 | ||
873 | dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest); | |
874 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS); | |
875 | if (IS_ERR(req)) { | |
b1ee94aa YZ |
876 | err = PTR_ERR(req); |
877 | goto out; | |
2817b000 | 878 | } |
687265e5 | 879 | req->r_path2 = kstrdup(dest, GFP_KERNEL); |
a149bb9a SK |
880 | if (!req->r_path2) { |
881 | err = -ENOMEM; | |
882 | ceph_mdsc_put_request(req); | |
883 | goto out; | |
884 | } | |
3dd69aab JL |
885 | req->r_parent = dir; |
886 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); | |
a149bb9a SK |
887 | req->r_dentry = dget(dentry); |
888 | req->r_num_caps = 2; | |
2817b000 SW |
889 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
890 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
891 | err = ceph_mdsc_do_request(mdsc, dir, req); | |
892 | if (!err && !req->r_reply_info.head->is_dentry) | |
893 | err = ceph_handle_notrace_create(dir, dentry); | |
894 | ceph_mdsc_put_request(req); | |
b1ee94aa YZ |
895 | out: |
896 | if (err) | |
2817b000 SW |
897 | d_drop(dentry); |
898 | return err; | |
899 | } | |
900 | ||
18bb1db3 | 901 | static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
2817b000 | 902 | { |
3d14c5d2 YS |
903 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
904 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 905 | struct ceph_mds_request *req; |
b1ee94aa | 906 | struct ceph_acls_info acls = {}; |
2817b000 SW |
907 | int err = -EROFS; |
908 | int op; | |
909 | ||
910 | if (ceph_snap(dir) == CEPH_SNAPDIR) { | |
911 | /* mkdir .snap/foo is a MKSNAP */ | |
912 | op = CEPH_MDS_OP_MKSNAP; | |
a455589f AV |
913 | dout("mksnap dir %p snap '%pd' dn %p\n", dir, |
914 | dentry, dentry); | |
2817b000 | 915 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { |
18bb1db3 | 916 | dout("mkdir dir %p dn %p mode 0%ho\n", dir, dentry, mode); |
2817b000 SW |
917 | op = CEPH_MDS_OP_MKDIR; |
918 | } else { | |
919 | goto out; | |
920 | } | |
b1ee94aa YZ |
921 | |
922 | mode |= S_IFDIR; | |
923 | err = ceph_pre_init_acls(dir, &mode, &acls); | |
924 | if (err < 0) | |
925 | goto out; | |
926 | ||
2817b000 SW |
927 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
928 | if (IS_ERR(req)) { | |
929 | err = PTR_ERR(req); | |
930 | goto out; | |
931 | } | |
932 | ||
933 | req->r_dentry = dget(dentry); | |
934 | req->r_num_caps = 2; | |
3dd69aab JL |
935 | req->r_parent = dir; |
936 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); | |
2817b000 SW |
937 | req->r_args.mkdir.mode = cpu_to_le32(mode); |
938 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
939 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
b1ee94aa YZ |
940 | if (acls.pagelist) { |
941 | req->r_pagelist = acls.pagelist; | |
942 | acls.pagelist = NULL; | |
943 | } | |
2817b000 | 944 | err = ceph_mdsc_do_request(mdsc, dir, req); |
275dd19e YZ |
945 | if (!err && |
946 | !req->r_reply_info.head->is_target && | |
947 | !req->r_reply_info.head->is_dentry) | |
2817b000 SW |
948 | err = ceph_handle_notrace_create(dir, dentry); |
949 | ceph_mdsc_put_request(req); | |
950 | out: | |
b20a95a0 | 951 | if (!err) |
2b0143b5 | 952 | ceph_init_inode_acls(d_inode(dentry), &acls); |
b20a95a0 | 953 | else |
2817b000 | 954 | d_drop(dentry); |
b1ee94aa | 955 | ceph_release_acls_info(&acls); |
2817b000 SW |
956 | return err; |
957 | } | |
958 | ||
959 | static int ceph_link(struct dentry *old_dentry, struct inode *dir, | |
960 | struct dentry *dentry) | |
961 | { | |
3d14c5d2 YS |
962 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
963 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 SW |
964 | struct ceph_mds_request *req; |
965 | int err; | |
966 | ||
967 | if (ceph_snap(dir) != CEPH_NOSNAP) | |
968 | return -EROFS; | |
969 | ||
970 | dout("link in dir %p old_dentry %p dentry %p\n", dir, | |
971 | old_dentry, dentry); | |
972 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS); | |
973 | if (IS_ERR(req)) { | |
974 | d_drop(dentry); | |
975 | return PTR_ERR(req); | |
976 | } | |
977 | req->r_dentry = dget(dentry); | |
978 | req->r_num_caps = 2; | |
4b58c9b1 | 979 | req->r_old_dentry = dget(old_dentry); |
3dd69aab JL |
980 | req->r_parent = dir; |
981 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); | |
2817b000 SW |
982 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
983 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
ad88f23f YZ |
984 | /* release LINK_SHARED on source inode (mds will lock it) */ |
985 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; | |
2817b000 | 986 | err = ceph_mdsc_do_request(mdsc, dir, req); |
70b666c3 | 987 | if (err) { |
2817b000 | 988 | d_drop(dentry); |
70b666c3 | 989 | } else if (!req->r_reply_info.head->is_dentry) { |
2b0143b5 DH |
990 | ihold(d_inode(old_dentry)); |
991 | d_instantiate(dentry, d_inode(old_dentry)); | |
70b666c3 | 992 | } |
2817b000 SW |
993 | ceph_mdsc_put_request(req); |
994 | return err; | |
995 | } | |
996 | ||
997 | /* | |
998 | * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it | |
999 | * looks like the link count will hit 0, drop any other caps (other | |
1000 | * than PIN) we don't specifically want (due to the file still being | |
1001 | * open). | |
1002 | */ | |
1003 | static int drop_caps_for_unlink(struct inode *inode) | |
1004 | { | |
1005 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1006 | int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL; | |
1007 | ||
be655596 | 1008 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
1009 | if (inode->i_nlink == 1) { |
1010 | drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN); | |
1011 | ci->i_ceph_flags |= CEPH_I_NODELAY; | |
1012 | } | |
be655596 | 1013 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
1014 | return drop; |
1015 | } | |
1016 | ||
1017 | /* | |
1018 | * rmdir and unlink are differ only by the metadata op code | |
1019 | */ | |
1020 | static int ceph_unlink(struct inode *dir, struct dentry *dentry) | |
1021 | { | |
3d14c5d2 YS |
1022 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
1023 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2b0143b5 | 1024 | struct inode *inode = d_inode(dentry); |
2817b000 SW |
1025 | struct ceph_mds_request *req; |
1026 | int err = -EROFS; | |
1027 | int op; | |
1028 | ||
1029 | if (ceph_snap(dir) == CEPH_SNAPDIR) { | |
1030 | /* rmdir .snap/foo is RMSNAP */ | |
a455589f | 1031 | dout("rmsnap dir %p '%pd' dn %p\n", dir, dentry, dentry); |
2817b000 SW |
1032 | op = CEPH_MDS_OP_RMSNAP; |
1033 | } else if (ceph_snap(dir) == CEPH_NOSNAP) { | |
1034 | dout("unlink/rmdir dir %p dn %p inode %p\n", | |
1035 | dir, dentry, inode); | |
e36cb0b8 | 1036 | op = d_is_dir(dentry) ? |
2817b000 SW |
1037 | CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK; |
1038 | } else | |
1039 | goto out; | |
1040 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); | |
1041 | if (IS_ERR(req)) { | |
1042 | err = PTR_ERR(req); | |
1043 | goto out; | |
1044 | } | |
1045 | req->r_dentry = dget(dentry); | |
1046 | req->r_num_caps = 2; | |
3dd69aab JL |
1047 | req->r_parent = dir; |
1048 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); | |
2817b000 SW |
1049 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; |
1050 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1051 | req->r_inode_drop = drop_caps_for_unlink(inode); | |
1052 | err = ceph_mdsc_do_request(mdsc, dir, req); | |
1053 | if (!err && !req->r_reply_info.head->is_dentry) | |
1054 | d_delete(dentry); | |
1055 | ceph_mdsc_put_request(req); | |
1056 | out: | |
1057 | return err; | |
1058 | } | |
1059 | ||
1060 | static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1cd66c93 MS |
1061 | struct inode *new_dir, struct dentry *new_dentry, |
1062 | unsigned int flags) | |
2817b000 | 1063 | { |
3d14c5d2 YS |
1064 | struct ceph_fs_client *fsc = ceph_sb_to_client(old_dir->i_sb); |
1065 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
2817b000 | 1066 | struct ceph_mds_request *req; |
0ea611a3 | 1067 | int op = CEPH_MDS_OP_RENAME; |
2817b000 SW |
1068 | int err; |
1069 | ||
1cd66c93 MS |
1070 | if (flags) |
1071 | return -EINVAL; | |
1072 | ||
2817b000 SW |
1073 | if (ceph_snap(old_dir) != ceph_snap(new_dir)) |
1074 | return -EXDEV; | |
0ea611a3 YZ |
1075 | if (ceph_snap(old_dir) != CEPH_NOSNAP) { |
1076 | if (old_dir == new_dir && ceph_snap(old_dir) == CEPH_SNAPDIR) | |
1077 | op = CEPH_MDS_OP_RENAMESNAP; | |
1078 | else | |
1079 | return -EROFS; | |
1080 | } | |
2817b000 SW |
1081 | dout("rename dir %p dentry %p to dir %p dentry %p\n", |
1082 | old_dir, old_dentry, new_dir, new_dentry); | |
0ea611a3 | 1083 | req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); |
2817b000 SW |
1084 | if (IS_ERR(req)) |
1085 | return PTR_ERR(req); | |
180061a5 | 1086 | ihold(old_dir); |
2817b000 SW |
1087 | req->r_dentry = dget(new_dentry); |
1088 | req->r_num_caps = 2; | |
1089 | req->r_old_dentry = dget(old_dentry); | |
180061a5 | 1090 | req->r_old_dentry_dir = old_dir; |
3dd69aab JL |
1091 | req->r_parent = new_dir; |
1092 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); | |
2817b000 SW |
1093 | req->r_old_dentry_drop = CEPH_CAP_FILE_SHARED; |
1094 | req->r_old_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1095 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED; | |
1096 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; | |
1097 | /* release LINK_RDCACHE on source inode (mds will lock it) */ | |
1098 | req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; | |
2b0143b5 DH |
1099 | if (d_really_is_positive(new_dentry)) |
1100 | req->r_inode_drop = drop_caps_for_unlink(d_inode(new_dentry)); | |
2817b000 SW |
1101 | err = ceph_mdsc_do_request(mdsc, old_dir, req); |
1102 | if (!err && !req->r_reply_info.head->is_dentry) { | |
1103 | /* | |
1104 | * Normally d_move() is done by fill_trace (called by | |
1105 | * do_request, above). If there is no trace, we need | |
1106 | * to do it here. | |
1107 | */ | |
ea1409f9 | 1108 | |
fdd4e158 YZ |
1109 | /* d_move screws up sibling dentries' offsets */ |
1110 | ceph_dir_clear_complete(old_dir); | |
1111 | ceph_dir_clear_complete(new_dir); | |
1112 | ||
2817b000 | 1113 | d_move(old_dentry, new_dentry); |
ea1409f9 SW |
1114 | |
1115 | /* ensure target dentry is invalidated, despite | |
1116 | rehashing bug in vfs_rename_dir */ | |
81a6cf2d | 1117 | ceph_invalidate_dentry_lease(new_dentry); |
2817b000 SW |
1118 | } |
1119 | ceph_mdsc_put_request(req); | |
1120 | return err; | |
1121 | } | |
1122 | ||
81a6cf2d SW |
1123 | /* |
1124 | * Ensure a dentry lease will no longer revalidate. | |
1125 | */ | |
1126 | void ceph_invalidate_dentry_lease(struct dentry *dentry) | |
1127 | { | |
1128 | spin_lock(&dentry->d_lock); | |
9b16f03c | 1129 | ceph_dentry(dentry)->time = jiffies; |
81a6cf2d SW |
1130 | ceph_dentry(dentry)->lease_shared_gen = 0; |
1131 | spin_unlock(&dentry->d_lock); | |
1132 | } | |
2817b000 SW |
1133 | |
1134 | /* | |
1135 | * Check if dentry lease is valid. If not, delete the lease. Try to | |
1136 | * renew if the least is more than half up. | |
1137 | */ | |
14fb9c9e JL |
1138 | static int dentry_lease_is_valid(struct dentry *dentry, unsigned int flags, |
1139 | struct inode *dir) | |
2817b000 SW |
1140 | { |
1141 | struct ceph_dentry_info *di; | |
1142 | struct ceph_mds_session *s; | |
1143 | int valid = 0; | |
1144 | u32 gen; | |
1145 | unsigned long ttl; | |
1146 | struct ceph_mds_session *session = NULL; | |
2817b000 SW |
1147 | u32 seq = 0; |
1148 | ||
1149 | spin_lock(&dentry->d_lock); | |
1150 | di = ceph_dentry(dentry); | |
14fb9c9e | 1151 | if (di && di->lease_session) { |
2817b000 | 1152 | s = di->lease_session; |
d8fb02ab | 1153 | spin_lock(&s->s_gen_ttl_lock); |
2817b000 SW |
1154 | gen = s->s_cap_gen; |
1155 | ttl = s->s_cap_ttl; | |
d8fb02ab | 1156 | spin_unlock(&s->s_gen_ttl_lock); |
2817b000 SW |
1157 | |
1158 | if (di->lease_gen == gen && | |
9b16f03c | 1159 | time_before(jiffies, di->time) && |
2817b000 SW |
1160 | time_before(jiffies, ttl)) { |
1161 | valid = 1; | |
1162 | if (di->lease_renew_after && | |
1163 | time_after(jiffies, di->lease_renew_after)) { | |
14fb9c9e JL |
1164 | /* |
1165 | * We should renew. If we're in RCU walk mode | |
1166 | * though, we can't do that so just return | |
1167 | * -ECHILD. | |
1168 | */ | |
1169 | if (flags & LOOKUP_RCU) { | |
1170 | valid = -ECHILD; | |
1171 | } else { | |
1172 | session = ceph_get_mds_session(s); | |
1173 | seq = di->lease_seq; | |
1174 | di->lease_renew_after = 0; | |
1175 | di->lease_renew_from = jiffies; | |
1176 | } | |
2817b000 | 1177 | } |
2817b000 SW |
1178 | } |
1179 | } | |
1180 | spin_unlock(&dentry->d_lock); | |
1181 | ||
1182 | if (session) { | |
1183 | ceph_mdsc_lease_send_msg(session, dir, dentry, | |
1184 | CEPH_MDS_LEASE_RENEW, seq); | |
1185 | ceph_put_mds_session(session); | |
1186 | } | |
1187 | dout("dentry_lease_is_valid - dentry %p = %d\n", dentry, valid); | |
1188 | return valid; | |
1189 | } | |
1190 | ||
1191 | /* | |
1192 | * Check if directory-wide content lease/cap is valid. | |
1193 | */ | |
1194 | static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry) | |
1195 | { | |
1196 | struct ceph_inode_info *ci = ceph_inode(dir); | |
1197 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
1198 | int valid = 0; | |
1199 | ||
be655596 | 1200 | spin_lock(&ci->i_ceph_lock); |
2817b000 SW |
1201 | if (ci->i_shared_gen == di->lease_shared_gen) |
1202 | valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1); | |
be655596 | 1203 | spin_unlock(&ci->i_ceph_lock); |
2817b000 SW |
1204 | dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n", |
1205 | dir, (unsigned)ci->i_shared_gen, dentry, | |
1206 | (unsigned)di->lease_shared_gen, valid); | |
1207 | return valid; | |
1208 | } | |
1209 | ||
1210 | /* | |
1211 | * Check if cached dentry can be trusted. | |
1212 | */ | |
0b728e19 | 1213 | static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags) |
2817b000 | 1214 | { |
bf1c6aca | 1215 | int valid = 0; |
641235d8 | 1216 | struct dentry *parent; |
34286d66 NP |
1217 | struct inode *dir; |
1218 | ||
f49d1e05 | 1219 | if (flags & LOOKUP_RCU) { |
52953d55 | 1220 | parent = READ_ONCE(dentry->d_parent); |
f49d1e05 JL |
1221 | dir = d_inode_rcu(parent); |
1222 | if (!dir) | |
1223 | return -ECHILD; | |
1224 | } else { | |
1225 | parent = dget_parent(dentry); | |
1226 | dir = d_inode(parent); | |
1227 | } | |
34286d66 | 1228 | |
a455589f | 1229 | dout("d_revalidate %p '%pd' inode %p offset %lld\n", dentry, |
2b0143b5 | 1230 | dentry, d_inode(dentry), ceph_dentry(dentry)->offset); |
2817b000 SW |
1231 | |
1232 | /* always trust cached snapped dentries, snapdir dentry */ | |
1233 | if (ceph_snap(dir) != CEPH_NOSNAP) { | |
a455589f | 1234 | dout("d_revalidate %p '%pd' inode %p is SNAPPED\n", dentry, |
2b0143b5 | 1235 | dentry, d_inode(dentry)); |
bf1c6aca | 1236 | valid = 1; |
2b0143b5 DH |
1237 | } else if (d_really_is_positive(dentry) && |
1238 | ceph_snap(d_inode(dentry)) == CEPH_SNAPDIR) { | |
bf1c6aca | 1239 | valid = 1; |
14fb9c9e JL |
1240 | } else { |
1241 | valid = dentry_lease_is_valid(dentry, flags, dir); | |
1242 | if (valid == -ECHILD) | |
1243 | return valid; | |
1244 | if (valid || dir_lease_is_valid(dir, dentry)) { | |
1245 | if (d_really_is_positive(dentry)) | |
1246 | valid = ceph_is_any_caps(d_inode(dentry)); | |
1247 | else | |
1248 | valid = 1; | |
1249 | } | |
2817b000 | 1250 | } |
2817b000 | 1251 | |
200fd27c YZ |
1252 | if (!valid) { |
1253 | struct ceph_mds_client *mdsc = | |
1254 | ceph_sb_to_client(dir->i_sb)->mdsc; | |
1255 | struct ceph_mds_request *req; | |
1097680d JL |
1256 | int op, err; |
1257 | u32 mask; | |
200fd27c | 1258 | |
f49d1e05 JL |
1259 | if (flags & LOOKUP_RCU) |
1260 | return -ECHILD; | |
1261 | ||
200fd27c | 1262 | op = ceph_snap(dir) == CEPH_SNAPDIR ? |
5eb9f604 | 1263 | CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; |
200fd27c YZ |
1264 | req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); |
1265 | if (!IS_ERR(req)) { | |
1266 | req->r_dentry = dget(dentry); | |
5eb9f604 JL |
1267 | req->r_num_caps = 2; |
1268 | req->r_parent = dir; | |
200fd27c YZ |
1269 | |
1270 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
1271 | if (ceph_security_xattr_wanted(dir)) | |
1272 | mask |= CEPH_CAP_XATTR_SHARED; | |
1097680d | 1273 | req->r_args.getattr.mask = cpu_to_le32(mask); |
200fd27c | 1274 | |
200fd27c | 1275 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
c3f4688a JL |
1276 | switch (err) { |
1277 | case 0: | |
1278 | if (d_really_is_positive(dentry) && | |
1279 | d_inode(dentry) == req->r_target_inode) | |
1280 | valid = 1; | |
1281 | break; | |
1282 | case -ENOENT: | |
1283 | if (d_really_is_negative(dentry)) | |
1284 | valid = 1; | |
1285 | /* Fallthrough */ | |
1286 | default: | |
1287 | break; | |
200fd27c YZ |
1288 | } |
1289 | ceph_mdsc_put_request(req); | |
1290 | dout("d_revalidate %p lookup result=%d\n", | |
1291 | dentry, err); | |
1292 | } | |
1293 | } | |
1294 | ||
bf1c6aca | 1295 | dout("d_revalidate %p %s\n", dentry, valid ? "valid" : "invalid"); |
9215aeea | 1296 | if (valid) { |
bf1c6aca | 1297 | ceph_dentry_lru_touch(dentry); |
9215aeea YZ |
1298 | } else { |
1299 | ceph_dir_clear_complete(dir); | |
9215aeea | 1300 | } |
641235d8 | 1301 | |
f49d1e05 JL |
1302 | if (!(flags & LOOKUP_RCU)) |
1303 | dput(parent); | |
bf1c6aca | 1304 | return valid; |
2817b000 SW |
1305 | } |
1306 | ||
1307 | /* | |
147851d2 | 1308 | * Release our ceph_dentry_info. |
2817b000 | 1309 | */ |
147851d2 | 1310 | static void ceph_d_release(struct dentry *dentry) |
2817b000 SW |
1311 | { |
1312 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
2817b000 | 1313 | |
147851d2 | 1314 | dout("d_release %p\n", dentry); |
3d8eb7a9 | 1315 | ceph_dentry_lru_del(dentry); |
5b484a51 JL |
1316 | |
1317 | spin_lock(&dentry->d_lock); | |
1318 | dentry->d_fsdata = NULL; | |
1319 | spin_unlock(&dentry->d_lock); | |
1320 | ||
3d8eb7a9 SW |
1321 | if (di->lease_session) |
1322 | ceph_put_mds_session(di->lease_session); | |
1323 | kmem_cache_free(ceph_dentry_cachep, di); | |
2817b000 SW |
1324 | } |
1325 | ||
b58dc410 SW |
1326 | /* |
1327 | * When the VFS prunes a dentry from the cache, we need to clear the | |
1328 | * complete flag on the parent directory. | |
1329 | * | |
1330 | * Called under dentry->d_lock. | |
1331 | */ | |
1332 | static void ceph_d_prune(struct dentry *dentry) | |
1333 | { | |
774ac21d | 1334 | dout("ceph_d_prune %p\n", dentry); |
b58dc410 SW |
1335 | |
1336 | /* do we have a valid parent? */ | |
8842b3be | 1337 | if (IS_ROOT(dentry)) |
b58dc410 SW |
1338 | return; |
1339 | ||
2f276c51 | 1340 | /* if we are not hashed, we don't affect dir's completeness */ |
b58dc410 SW |
1341 | if (d_unhashed(dentry)) |
1342 | return; | |
2817b000 | 1343 | |
18fc8abd AV |
1344 | if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_SNAPDIR) |
1345 | return; | |
1346 | ||
b58dc410 SW |
1347 | /* |
1348 | * we hold d_lock, so d_parent is stable, and d_fsdata is never | |
1349 | * cleared until d_release | |
1350 | */ | |
2b0143b5 | 1351 | ceph_dir_clear_complete(d_inode(dentry->d_parent)); |
b58dc410 | 1352 | } |
2817b000 SW |
1353 | |
1354 | /* | |
1355 | * read() on a dir. This weird interface hack only works if mounted | |
1356 | * with '-o dirstat'. | |
1357 | */ | |
1358 | static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, | |
1359 | loff_t *ppos) | |
1360 | { | |
1361 | struct ceph_file_info *cf = file->private_data; | |
496ad9aa | 1362 | struct inode *inode = file_inode(file); |
2817b000 SW |
1363 | struct ceph_inode_info *ci = ceph_inode(inode); |
1364 | int left; | |
ae598083 | 1365 | const int bufsize = 1024; |
2817b000 | 1366 | |
3d14c5d2 | 1367 | if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT)) |
2817b000 SW |
1368 | return -EISDIR; |
1369 | ||
1370 | if (!cf->dir_info) { | |
687265e5 | 1371 | cf->dir_info = kmalloc(bufsize, GFP_KERNEL); |
2817b000 SW |
1372 | if (!cf->dir_info) |
1373 | return -ENOMEM; | |
1374 | cf->dir_info_len = | |
ae598083 | 1375 | snprintf(cf->dir_info, bufsize, |
2817b000 SW |
1376 | "entries: %20lld\n" |
1377 | " files: %20lld\n" | |
1378 | " subdirs: %20lld\n" | |
1379 | "rentries: %20lld\n" | |
1380 | " rfiles: %20lld\n" | |
1381 | " rsubdirs: %20lld\n" | |
1382 | "rbytes: %20lld\n" | |
1383 | "rctime: %10ld.%09ld\n", | |
1384 | ci->i_files + ci->i_subdirs, | |
1385 | ci->i_files, | |
1386 | ci->i_subdirs, | |
1387 | ci->i_rfiles + ci->i_rsubdirs, | |
1388 | ci->i_rfiles, | |
1389 | ci->i_rsubdirs, | |
1390 | ci->i_rbytes, | |
1391 | (long)ci->i_rctime.tv_sec, | |
1392 | (long)ci->i_rctime.tv_nsec); | |
1393 | } | |
1394 | ||
1395 | if (*ppos >= cf->dir_info_len) | |
1396 | return 0; | |
1397 | size = min_t(unsigned, size, cf->dir_info_len-*ppos); | |
1398 | left = copy_to_user(buf, cf->dir_info + *ppos, size); | |
1399 | if (left == size) | |
1400 | return -EFAULT; | |
1401 | *ppos += (size - left); | |
1402 | return size - left; | |
1403 | } | |
1404 | ||
2817b000 SW |
1405 | /* |
1406 | * We maintain a private dentry LRU. | |
1407 | * | |
1408 | * FIXME: this needs to be changed to a per-mds lru to be useful. | |
1409 | */ | |
1410 | void ceph_dentry_lru_add(struct dentry *dn) | |
1411 | { | |
1412 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1413 | struct ceph_mds_client *mdsc; | |
2817b000 | 1414 | |
a455589f | 1415 | dout("dentry_lru_add %p %p '%pd'\n", di, dn, dn); |
3d8eb7a9 SW |
1416 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1417 | spin_lock(&mdsc->dentry_lru_lock); | |
1418 | list_add_tail(&di->lru, &mdsc->dentry_lru); | |
1419 | mdsc->num_dentry++; | |
1420 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1421 | } |
1422 | ||
1423 | void ceph_dentry_lru_touch(struct dentry *dn) | |
1424 | { | |
1425 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1426 | struct ceph_mds_client *mdsc; | |
2817b000 | 1427 | |
a455589f AV |
1428 | dout("dentry_lru_touch %p %p '%pd' (offset %lld)\n", di, dn, dn, |
1429 | di->offset); | |
3d8eb7a9 SW |
1430 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1431 | spin_lock(&mdsc->dentry_lru_lock); | |
1432 | list_move_tail(&di->lru, &mdsc->dentry_lru); | |
1433 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1434 | } |
1435 | ||
1436 | void ceph_dentry_lru_del(struct dentry *dn) | |
1437 | { | |
1438 | struct ceph_dentry_info *di = ceph_dentry(dn); | |
1439 | struct ceph_mds_client *mdsc; | |
1440 | ||
a455589f | 1441 | dout("dentry_lru_del %p %p '%pd'\n", di, dn, dn); |
3d8eb7a9 SW |
1442 | mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; |
1443 | spin_lock(&mdsc->dentry_lru_lock); | |
1444 | list_del_init(&di->lru); | |
1445 | mdsc->num_dentry--; | |
1446 | spin_unlock(&mdsc->dentry_lru_lock); | |
2817b000 SW |
1447 | } |
1448 | ||
6c0f3af7 SW |
1449 | /* |
1450 | * Return name hash for a given dentry. This is dependent on | |
1451 | * the parent directory's hash function. | |
1452 | */ | |
e5f86dc3 | 1453 | unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn) |
6c0f3af7 | 1454 | { |
6c0f3af7 SW |
1455 | struct ceph_inode_info *dci = ceph_inode(dir); |
1456 | ||
1457 | switch (dci->i_dir_layout.dl_dir_hash) { | |
1458 | case 0: /* for backward compat */ | |
1459 | case CEPH_STR_HASH_LINUX: | |
1460 | return dn->d_name.hash; | |
1461 | ||
1462 | default: | |
1463 | return ceph_str_hash(dci->i_dir_layout.dl_dir_hash, | |
1464 | dn->d_name.name, dn->d_name.len); | |
1465 | } | |
1466 | } | |
1467 | ||
2817b000 SW |
1468 | const struct file_operations ceph_dir_fops = { |
1469 | .read = ceph_read_dir, | |
77acfa29 | 1470 | .iterate = ceph_readdir, |
2817b000 SW |
1471 | .llseek = ceph_dir_llseek, |
1472 | .open = ceph_open, | |
1473 | .release = ceph_release, | |
1474 | .unlocked_ioctl = ceph_ioctl, | |
da819c81 | 1475 | .fsync = ceph_fsync, |
2817b000 SW |
1476 | }; |
1477 | ||
38c48b5f YZ |
1478 | const struct file_operations ceph_snapdir_fops = { |
1479 | .iterate = ceph_readdir, | |
1480 | .llseek = ceph_dir_llseek, | |
1481 | .open = ceph_open, | |
1482 | .release = ceph_release, | |
1483 | }; | |
1484 | ||
2817b000 SW |
1485 | const struct inode_operations ceph_dir_iops = { |
1486 | .lookup = ceph_lookup, | |
1487 | .permission = ceph_permission, | |
1488 | .getattr = ceph_getattr, | |
1489 | .setattr = ceph_setattr, | |
2817b000 | 1490 | .listxattr = ceph_listxattr, |
7221fe4c | 1491 | .get_acl = ceph_get_acl, |
72466d0b | 1492 | .set_acl = ceph_set_acl, |
2817b000 SW |
1493 | .mknod = ceph_mknod, |
1494 | .symlink = ceph_symlink, | |
1495 | .mkdir = ceph_mkdir, | |
1496 | .link = ceph_link, | |
1497 | .unlink = ceph_unlink, | |
1498 | .rmdir = ceph_unlink, | |
1499 | .rename = ceph_rename, | |
1500 | .create = ceph_create, | |
2d83bde9 | 1501 | .atomic_open = ceph_atomic_open, |
2817b000 SW |
1502 | }; |
1503 | ||
38c48b5f YZ |
1504 | const struct inode_operations ceph_snapdir_iops = { |
1505 | .lookup = ceph_lookup, | |
1506 | .permission = ceph_permission, | |
1507 | .getattr = ceph_getattr, | |
1508 | .mkdir = ceph_mkdir, | |
1509 | .rmdir = ceph_unlink, | |
0ea611a3 | 1510 | .rename = ceph_rename, |
38c48b5f YZ |
1511 | }; |
1512 | ||
52dfb8ac | 1513 | const struct dentry_operations ceph_dentry_ops = { |
2817b000 | 1514 | .d_revalidate = ceph_d_revalidate, |
147851d2 | 1515 | .d_release = ceph_d_release, |
b58dc410 | 1516 | .d_prune = ceph_d_prune, |
ad5cb123 | 1517 | .d_init = ceph_d_init, |
2817b000 | 1518 | }; |