?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Staging: hv: hv_mouse: unwind the initialization process a bit
[zen-stable.git] / fs / ceph / dir.c
blob0bc68de8edd7baa27af0de76cdae1f6eb1e29fea
1 #include <linux/ceph/ceph_debug.h>
2
3 #include <linux/spinlock.h>
4 #include <linux/fs_struct.h>
5 #include <linux/namei.h>
6 #include <linux/slab.h>
7 #include <linux/sched.h>
8
9 #include "super.h"
10 #include "mds_client.h"
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
29 const struct inode_operations ceph_dir_iops;
30 const struct file_operations ceph_dir_fops;
31 const struct dentry_operations ceph_dentry_ops;
32
33 /*
34 * Initialize ceph dentry state.
35 */
36 int ceph_init_dentry(struct dentry *dentry)
37 {
38 struct ceph_dentry_info *di;
39
40 if (dentry->d_fsdata)
41 return 0;
42
43 if (dentry->d_parent == NULL || /* nfs fh_to_dentry */
44 ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP)
45 d_set_d_op(dentry, &ceph_dentry_ops);
46 else if (ceph_snap(dentry->d_parent->d_inode) == CEPH_SNAPDIR)
47 d_set_d_op(dentry, &ceph_snapdir_dentry_ops);
48 else
49 d_set_d_op(dentry, &ceph_snap_dentry_ops);
50
51 di = kmem_cache_alloc(ceph_dentry_cachep, GFP_NOFS | __GFP_ZERO);
52 if (!di)
53 return -ENOMEM; /* oh well */
54
55 spin_lock(&dentry->d_lock);
56 if (dentry->d_fsdata) {
57 /* lost a race */
58 kmem_cache_free(ceph_dentry_cachep, di);
59 goto out_unlock;
60 }
61 di->dentry = dentry;
62 di->lease_session = NULL;
63 dentry->d_fsdata = di;
64 dentry->d_time = jiffies;
65 ceph_dentry_lru_add(dentry);
66 out_unlock:
67 spin_unlock(&dentry->d_lock);
68 return 0;
69 }
70
71
72
73 /*
74 * for readdir, we encode the directory frag and offset within that
75 * frag into f_pos.
76 */
77 static unsigned fpos_frag(loff_t p)
78 {
79 return p >> 32;
80 }
81 static unsigned fpos_off(loff_t p)
82 {
83 return p & 0xffffffff;
84 }
85
86 /*
87 * When possible, we try to satisfy a readdir by peeking at the
88 * dcache. We make this work by carefully ordering dentries on
89 * d_u.d_child when we initially get results back from the MDS, and
90 * falling back to a "normal" sync readdir if any dentries in the dir
91 * are dropped.
92 *
93 * I_COMPLETE tells indicates we have all dentries in the dir. It is
94 * defined IFF we hold CEPH_CAP_FILE_SHARED (which will be revoked by
95 * the MDS if/when the directory is modified).
96 */
97 static int __dcache_readdir(struct file *filp,
98 void *dirent, filldir_t filldir)
99 {
100 struct ceph_file_info *fi = filp->private_data;
101 struct dentry *parent = filp->f_dentry;
102 struct inode *dir = parent->d_inode;
103 struct list_head *p;
104 struct dentry *dentry, *last;
105 struct ceph_dentry_info *di;
106 int err = 0;
107
108 /* claim ref on last dentry we returned */
109 last = fi->dentry;
110 fi->dentry = NULL;
111
112 dout("__dcache_readdir %p at %llu (last %p)\n", dir, filp->f_pos,
113 last);
114
115 spin_lock(&parent->d_lock);
116
117 /* start at beginning? */
118 if (filp->f_pos == 2 || last == NULL ||
119 filp->f_pos < ceph_dentry(last)->offset) {
120 if (list_empty(&parent->d_subdirs))
121 goto out_unlock;
122 p = parent->d_subdirs.prev;
123 dout(" initial p %p/%p\n", p->prev, p->next);
124 } else {
125 p = last->d_u.d_child.prev;
126 }
127
128 more:
129 dentry = list_entry(p, struct dentry, d_u.d_child);
130 di = ceph_dentry(dentry);
131 while (1) {
132 dout(" p %p/%p %s d_subdirs %p/%p\n", p->prev, p->next,
133 d_unhashed(dentry) ? "!hashed" : "hashed",
134 parent->d_subdirs.prev, parent->d_subdirs.next);
135 if (p == &parent->d_subdirs) {
136 fi->at_end = 1;
137 goto out_unlock;
138 }
139 spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
140 if (!d_unhashed(dentry) && dentry->d_inode &&
141 ceph_snap(dentry->d_inode) != CEPH_SNAPDIR &&
142 ceph_ino(dentry->d_inode) != CEPH_INO_CEPH &&
143 filp->f_pos <= di->offset)
144 break;
145 dout(" skipping %p %.*s at %llu (%llu)%s%s\n", dentry,
146 dentry->d_name.len, dentry->d_name.name, di->offset,
147 filp->f_pos, d_unhashed(dentry) ? " unhashed" : "",
148 !dentry->d_inode ? " null" : "");
149 spin_unlock(&dentry->d_lock);
150 p = p->prev;
151 dentry = list_entry(p, struct dentry, d_u.d_child);
152 di = ceph_dentry(dentry);
153 }
154
155 dget_dlock(dentry);
156 spin_unlock(&dentry->d_lock);
157 spin_unlock(&parent->d_lock);
158
159 dout(" %llu (%llu) dentry %p %.*s %p\n", di->offset, filp->f_pos,
160 dentry, dentry->d_name.len, dentry->d_name.name, dentry->d_inode);
161 filp->f_pos = di->offset;
162 err = filldir(dirent, dentry->d_name.name,
163 dentry->d_name.len, di->offset,
164 dentry->d_inode->i_ino,
165 dentry->d_inode->i_mode >> 12);
166
167 if (last) {
168 if (err < 0) {
169 /* remember our position */
170 fi->dentry = last;
171 fi->next_offset = di->offset;
172 } else {
173 dput(last);
174 }
175 }
176 last = dentry;
177
178 if (err < 0)
179 goto out;
180
181 filp->f_pos++;
182
183 /* make sure a dentry wasn't dropped while we didn't have parent lock */
184 if (!ceph_i_test(dir, CEPH_I_COMPLETE)) {
185 dout(" lost I_COMPLETE on %p; falling back to mds\n", dir);
186 err = -EAGAIN;
187 goto out;
188 }
189
190 spin_lock(&parent->d_lock);
191 p = p->prev; /* advance to next dentry */
192 goto more;
193
194 out_unlock:
195 spin_unlock(&parent->d_lock);
196 out:
197 if (last)
198 dput(last);
199 return err;
200 }
201
202 /*
203 * make note of the last dentry we read, so we can
204 * continue at the same lexicographical point,
205 * regardless of what dir changes take place on the
206 * server.
207 */
208 static int note_last_dentry(struct ceph_file_info *fi, const char *name,
209 int len)
210 {
211 kfree(fi->last_name);
212 fi->last_name = kmalloc(len+1, GFP_NOFS);
213 if (!fi->last_name)
214 return -ENOMEM;
215 memcpy(fi->last_name, name, len);
216 fi->last_name[len] = 0;
217 dout("note_last_dentry '%s'\n", fi->last_name);
218 return 0;
219 }
220
221 static int ceph_readdir(struct file *filp, void *dirent, filldir_t filldir)
222 {
223 struct ceph_file_info *fi = filp->private_data;
224 struct inode *inode = filp->f_dentry->d_inode;
225 struct ceph_inode_info *ci = ceph_inode(inode);
226 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
227 struct ceph_mds_client *mdsc = fsc->mdsc;
228 unsigned frag = fpos_frag(filp->f_pos);
229 int off = fpos_off(filp->f_pos);
230 int err;
231 u32 ftype;
232 struct ceph_mds_reply_info_parsed *rinfo;
233 const int max_entries = fsc->mount_options->max_readdir;
234 const int max_bytes = fsc->mount_options->max_readdir_bytes;
235
236 dout("readdir %p filp %p frag %u off %u\n", inode, filp, frag, off);
237 if (fi->at_end)
238 return 0;
239
240 /* always start with . and .. */
241 if (filp->f_pos == 0) {
242 /* note dir version at start of readdir so we can tell
243 * if any dentries get dropped */
244 fi->dir_release_count = ci->i_release_count;
245
246 dout("readdir off 0 -> '.'\n");
247 if (filldir(dirent, ".", 1, ceph_make_fpos(0, 0),
248 inode->i_ino, inode->i_mode >> 12) < 0)
249 return 0;
250 filp->f_pos = 1;
251 off = 1;
252 }
253 if (filp->f_pos == 1) {
254 dout("readdir off 1 -> '..'\n");
255 if (filldir(dirent, "..", 2, ceph_make_fpos(0, 1),
256 filp->f_dentry->d_parent->d_inode->i_ino,
257 inode->i_mode >> 12) < 0)
258 return 0;
259 filp->f_pos = 2;
260 off = 2;
261 }
262
263 /* can we use the dcache? */
264 spin_lock(&inode->i_lock);
265 if ((filp->f_pos == 2 || fi->dentry) &&
266 !ceph_test_mount_opt(fsc, NOASYNCREADDIR) &&
267 ceph_snap(inode) != CEPH_SNAPDIR &&
268 (ci->i_ceph_flags & CEPH_I_COMPLETE) &&
269 __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) {
270 spin_unlock(&inode->i_lock);
271 err = __dcache_readdir(filp, dirent, filldir);
272 if (err != -EAGAIN)
273 return err;
274 } else {
275 spin_unlock(&inode->i_lock);
276 }
277 if (fi->dentry) {
278 err = note_last_dentry(fi, fi->dentry->d_name.name,
279 fi->dentry->d_name.len);
280 if (err)
281 return err;
282 dput(fi->dentry);
283 fi->dentry = NULL;
284 }
285
286 /* proceed with a normal readdir */
287
288 more:
289 /* do we have the correct frag content buffered? */
290 if (fi->frag != frag || fi->last_readdir == NULL) {
291 struct ceph_mds_request *req;
292 int op = ceph_snap(inode) == CEPH_SNAPDIR ?
293 CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR;
294
295 /* discard old result, if any */
296 if (fi->last_readdir) {
297 ceph_mdsc_put_request(fi->last_readdir);
298 fi->last_readdir = NULL;
299 }
300
301 /* requery frag tree, as the frag topology may have changed */
302 frag = ceph_choose_frag(ceph_inode(inode), frag, NULL, NULL);
303
304 dout("readdir fetching %llx.%llx frag %x offset '%s'\n",
305 ceph_vinop(inode), frag, fi->last_name);
306 req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
307 if (IS_ERR(req))
308 return PTR_ERR(req);
309 req->r_inode = igrab(inode);
310 req->r_dentry = dget(filp->f_dentry);
311 /* hints to request -> mds selection code */
312 req->r_direct_mode = USE_AUTH_MDS;
313 req->r_direct_hash = ceph_frag_value(frag);
314 req->r_direct_is_hash = true;
315 req->r_path2 = kstrdup(fi->last_name, GFP_NOFS);
316 req->r_readdir_offset = fi->next_offset;
317 req->r_args.readdir.frag = cpu_to_le32(frag);
318 req->r_args.readdir.max_entries = cpu_to_le32(max_entries);
319 req->r_args.readdir.max_bytes = cpu_to_le32(max_bytes);
320 req->r_num_caps = max_entries + 1;
321 err = ceph_mdsc_do_request(mdsc, NULL, req);
322 if (err < 0) {
323 ceph_mdsc_put_request(req);
324 return err;
325 }
326 dout("readdir got and parsed readdir result=%d"
327 " on frag %x, end=%d, complete=%d\n", err, frag,
328 (int)req->r_reply_info.dir_end,
329 (int)req->r_reply_info.dir_complete);
330
331 if (!req->r_did_prepopulate) {
332 dout("readdir !did_prepopulate");
333 fi->dir_release_count--; /* preclude I_COMPLETE */
334 }
335
336 /* note next offset and last dentry name */
337 fi->offset = fi->next_offset;
338 fi->last_readdir = req;
339
340 if (req->r_reply_info.dir_end) {
341 kfree(fi->last_name);
342 fi->last_name = NULL;
343 if (ceph_frag_is_rightmost(frag))
344 fi->next_offset = 2;
345 else
346 fi->next_offset = 0;
347 } else {
348 rinfo = &req->r_reply_info;
349 err = note_last_dentry(fi,
350 rinfo->dir_dname[rinfo->dir_nr-1],
351 rinfo->dir_dname_len[rinfo->dir_nr-1]);
352 if (err)
353 return err;
354 fi->next_offset += rinfo->dir_nr;
355 }
356 }
357
358 rinfo = &fi->last_readdir->r_reply_info;
359 dout("readdir frag %x num %d off %d chunkoff %d\n", frag,
360 rinfo->dir_nr, off, fi->offset);
361 while (off - fi->offset >= 0 && off - fi->offset < rinfo->dir_nr) {
362 u64 pos = ceph_make_fpos(frag, off);
363 struct ceph_mds_reply_inode *in =
364 rinfo->dir_in[off - fi->offset].in;
365 struct ceph_vino vino;
366 ino_t ino;
367
368 dout("readdir off %d (%d/%d) -> %lld '%.*s' %p\n",
369 off, off - fi->offset, rinfo->dir_nr, pos,
370 rinfo->dir_dname_len[off - fi->offset],
371 rinfo->dir_dname[off - fi->offset], in);
372 BUG_ON(!in);
373 ftype = le32_to_cpu(in->mode) >> 12;
374 vino.ino = le64_to_cpu(in->ino);
375 vino.snap = le64_to_cpu(in->snapid);
376 ino = ceph_vino_to_ino(vino);
377 if (filldir(dirent,
378 rinfo->dir_dname[off - fi->offset],
379 rinfo->dir_dname_len[off - fi->offset],
380 pos, ino, ftype) < 0) {
381 dout("filldir stopping us...\n");
382 return 0;
383 }
384 off++;
385 filp->f_pos = pos + 1;
386 }
387
388 if (fi->last_name) {
389 ceph_mdsc_put_request(fi->last_readdir);
390 fi->last_readdir = NULL;
391 goto more;
392 }
393
394 /* more frags? */
395 if (!ceph_frag_is_rightmost(frag)) {
396 frag = ceph_frag_next(frag);
397 off = 0;
398 filp->f_pos = ceph_make_fpos(frag, off);
399 dout("readdir next frag is %x\n", frag);
400 goto more;
401 }
402 fi->at_end = 1;
403
404 /*
405 * if dir_release_count still matches the dir, no dentries
406 * were released during the whole readdir, and we should have
407 * the complete dir contents in our cache.
408 */
409 spin_lock(&inode->i_lock);
410 if (ci->i_release_count == fi->dir_release_count) {
411 dout(" marking %p complete\n", inode);
412 ci->i_ceph_flags |= CEPH_I_COMPLETE;
413 ci->i_max_offset = filp->f_pos;
414 }
415 spin_unlock(&inode->i_lock);
416
417 dout("readdir %p filp %p done.\n", inode, filp);
418 return 0;
419 }
420
421 static void reset_readdir(struct ceph_file_info *fi)
422 {
423 if (fi->last_readdir) {
424 ceph_mdsc_put_request(fi->last_readdir);
425 fi->last_readdir = NULL;
426 }
427 kfree(fi->last_name);
428 fi->last_name = NULL;
429 fi->next_offset = 2; /* compensate for . and .. */
430 if (fi->dentry) {
431 dput(fi->dentry);
432 fi->dentry = NULL;
433 }
434 fi->at_end = 0;
435 }
436
437 static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int origin)
438 {
439 struct ceph_file_info *fi = file->private_data;
440 struct inode *inode = file->f_mapping->host;
441 loff_t old_offset = offset;
442 loff_t retval;
443
444 mutex_lock(&inode->i_mutex);
445 switch (origin) {
446 case SEEK_END:
447 offset += inode->i_size + 2; /* FIXME */
448 break;
449 case SEEK_CUR:
450 offset += file->f_pos;
451 }
452 retval = -EINVAL;
453 if (offset >= 0 && offset <= inode->i_sb->s_maxbytes) {
454 if (offset != file->f_pos) {
455 file->f_pos = offset;
456 file->f_version = 0;
457 fi->at_end = 0;
458 }
459 retval = offset;
460
461 /*
462 * discard buffered readdir content on seekdir(0), or
463 * seek to new frag, or seek prior to current chunk.
464 */
465 if (offset == 0 ||
466 fpos_frag(offset) != fpos_frag(old_offset) ||
467 fpos_off(offset) < fi->offset) {
468 dout("dir_llseek dropping %p content\n", file);
469 reset_readdir(fi);
470 }
471
472 /* bump dir_release_count if we did a forward seek */
473 if (offset > old_offset)
474 fi->dir_release_count--;
475 }
476 mutex_unlock(&inode->i_mutex);
477 return retval;
478 }
479
480 /*
481 * Process result of a lookup/open request.
482 *
483 * Mainly, make sure we return the final req->r_dentry (if it already
484 * existed) in place of the original VFS-provided dentry when they
485 * differ.
486 *
487 * Gracefully handle the case where the MDS replies with -ENOENT and
488 * no trace (which it may do, at its discretion, e.g., if it doesn't
489 * care to issue a lease on the negative dentry).
490 */
491 struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
492 struct dentry *dentry, int err)
493 {
494 struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
495 struct inode *parent = dentry->d_parent->d_inode;
496
497 /* .snap dir? */
498 if (err == -ENOENT &&
499 strcmp(dentry->d_name.name,
500 fsc->mount_options->snapdir_name) == 0) {
501 struct inode *inode = ceph_get_snapdir(parent);
502 dout("ENOENT on snapdir %p '%.*s', linking to snapdir %p\n",
503 dentry, dentry->d_name.len, dentry->d_name.name, inode);
504 BUG_ON(!d_unhashed(dentry));
505 d_add(dentry, inode);
506 err = 0;
507 }
508
509 if (err == -ENOENT) {
510 /* no trace? */
511 err = 0;
512 if (!req->r_reply_info.head->is_dentry) {
513 dout("ENOENT and no trace, dentry %p inode %p\n",
514 dentry, dentry->d_inode);
515 if (dentry->d_inode) {
516 d_drop(dentry);
517 err = -ENOENT;
518 } else {
519 d_add(dentry, NULL);
520 }
521 }
522 }
523 if (err)
524 dentry = ERR_PTR(err);
525 else if (dentry != req->r_dentry)
526 dentry = dget(req->r_dentry); /* we got spliced */
527 else
528 dentry = NULL;
529 return dentry;
530 }
531
532 static int is_root_ceph_dentry(struct inode *inode, struct dentry *dentry)
533 {
534 return ceph_ino(inode) == CEPH_INO_ROOT &&
535 strncmp(dentry->d_name.name, ".ceph", 5) == 0;
536 }
537
538 /*
539 * Look up a single dir entry. If there is a lookup intent, inform
540 * the MDS so that it gets our 'caps wanted' value in a single op.
541 */
542 static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
543 struct nameidata *nd)
544 {
545 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
546 struct ceph_mds_client *mdsc = fsc->mdsc;
547 struct ceph_mds_request *req;
548 int op;
549 int err;
550
551 dout("lookup %p dentry %p '%.*s'\n",
552 dir, dentry, dentry->d_name.len, dentry->d_name.name);
553
554 if (dentry->d_name.len > NAME_MAX)
555 return ERR_PTR(-ENAMETOOLONG);
556
557 err = ceph_init_dentry(dentry);
558 if (err < 0)
559 return ERR_PTR(err);
560
561 /* open (but not create!) intent? */
562 if (nd &&
563 (nd->flags & LOOKUP_OPEN) &&
564 (nd->flags & LOOKUP_CONTINUE) == 0 && /* only open last component */
565 !(nd->intent.open.flags & O_CREAT)) {
566 int mode = nd->intent.open.create_mode & ~current->fs->umask;
567 return ceph_lookup_open(dir, dentry, nd, mode, 1);
568 }
569
570 /* can we conclude ENOENT locally? */
571 if (dentry->d_inode == NULL) {
572 struct ceph_inode_info *ci = ceph_inode(dir);
573 struct ceph_dentry_info *di = ceph_dentry(dentry);
574
575 spin_lock(&dir->i_lock);
576 dout(" dir %p flags are %d\n", dir, ci->i_ceph_flags);
577 if (strncmp(dentry->d_name.name,
578 fsc->mount_options->snapdir_name,
579 dentry->d_name.len) &&
580 !is_root_ceph_dentry(dir, dentry) &&
581 (ci->i_ceph_flags & CEPH_I_COMPLETE) &&
582 (__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) {
583 spin_unlock(&dir->i_lock);
584 dout(" dir %p complete, -ENOENT\n", dir);
585 d_add(dentry, NULL);
586 di->lease_shared_gen = ci->i_shared_gen;
587 return NULL;
588 }
589 spin_unlock(&dir->i_lock);
590 }
591
592 op = ceph_snap(dir) == CEPH_SNAPDIR ?
593 CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP;
594 req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS);
595 if (IS_ERR(req))
596 return ERR_CAST(req);
597 req->r_dentry = dget(dentry);
598 req->r_num_caps = 2;
599 /* we only need inode linkage */
600 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
601 req->r_locked_dir = dir;
602 err = ceph_mdsc_do_request(mdsc, NULL, req);
603 dentry = ceph_finish_lookup(req, dentry, err);
604 ceph_mdsc_put_request(req); /* will dput(dentry) */
605 dout("lookup result=%p\n", dentry);
606 return dentry;
607 }
608
609 /*
610 * If we do a create but get no trace back from the MDS, follow up with
611 * a lookup (the VFS expects us to link up the provided dentry).
612 */
613 int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry)
614 {
615 struct dentry *result = ceph_lookup(dir, dentry, NULL);
616
617 if (result && !IS_ERR(result)) {
618 /*
619 * We created the item, then did a lookup, and found
620 * it was already linked to another inode we already
621 * had in our cache (and thus got spliced). Link our
622 * dentry to that inode, but don't hash it, just in
623 * case the VFS wants to dereference it.
624 */
625 BUG_ON(!result->d_inode);
626 d_instantiate(dentry, result->d_inode);
627 return 0;
628 }
629 return PTR_ERR(result);
630 }
631
632 static int ceph_mknod(struct inode *dir, struct dentry *dentry,
633 int mode, dev_t rdev)
634 {
635 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
636 struct ceph_mds_client *mdsc = fsc->mdsc;
637 struct ceph_mds_request *req;
638 int err;
639
640 if (ceph_snap(dir) != CEPH_NOSNAP)
641 return -EROFS;
642
643 dout("mknod in dir %p dentry %p mode 0%o rdev %d\n",
644 dir, dentry, mode, rdev);
645 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS);
646 if (IS_ERR(req)) {
647 d_drop(dentry);
648 return PTR_ERR(req);
649 }
650 req->r_dentry = dget(dentry);
651 req->r_num_caps = 2;
652 req->r_locked_dir = dir;
653 req->r_args.mknod.mode = cpu_to_le32(mode);
654 req->r_args.mknod.rdev = cpu_to_le32(rdev);
655 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
656 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
657 err = ceph_mdsc_do_request(mdsc, dir, req);
658 if (!err && !req->r_reply_info.head->is_dentry)
659 err = ceph_handle_notrace_create(dir, dentry);
660 ceph_mdsc_put_request(req);
661 if (err)
662 d_drop(dentry);
663 return err;
664 }
665
666 static int ceph_create(struct inode *dir, struct dentry *dentry, int mode,
667 struct nameidata *nd)
668 {
669 dout("create in dir %p dentry %p name '%.*s'\n",
670 dir, dentry, dentry->d_name.len, dentry->d_name.name);
671
672 if (ceph_snap(dir) != CEPH_NOSNAP)
673 return -EROFS;
674
675 if (nd) {
676 BUG_ON((nd->flags & LOOKUP_OPEN) == 0);
677 dentry = ceph_lookup_open(dir, dentry, nd, mode, 0);
678 /* hrm, what should i do here if we get aliased? */
679 if (IS_ERR(dentry))
680 return PTR_ERR(dentry);
681 return 0;
682 }
683
684 /* fall back to mknod */
685 return ceph_mknod(dir, dentry, (mode & ~S_IFMT) | S_IFREG, 0);
686 }
687
688 static int ceph_symlink(struct inode *dir, struct dentry *dentry,
689 const char *dest)
690 {
691 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
692 struct ceph_mds_client *mdsc = fsc->mdsc;
693 struct ceph_mds_request *req;
694 int err;
695
696 if (ceph_snap(dir) != CEPH_NOSNAP)
697 return -EROFS;
698
699 dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest);
700 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS);
701 if (IS_ERR(req)) {
702 d_drop(dentry);
703 return PTR_ERR(req);
704 }
705 req->r_dentry = dget(dentry);
706 req->r_num_caps = 2;
707 req->r_path2 = kstrdup(dest, GFP_NOFS);
708 req->r_locked_dir = dir;
709 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
710 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
711 err = ceph_mdsc_do_request(mdsc, dir, req);
712 if (!err && !req->r_reply_info.head->is_dentry)
713 err = ceph_handle_notrace_create(dir, dentry);
714 ceph_mdsc_put_request(req);
715 if (err)
716 d_drop(dentry);
717 return err;
718 }
719
720 static int ceph_mkdir(struct inode *dir, struct dentry *dentry, int mode)
721 {
722 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
723 struct ceph_mds_client *mdsc = fsc->mdsc;
724 struct ceph_mds_request *req;
725 int err = -EROFS;
726 int op;
727
728 if (ceph_snap(dir) == CEPH_SNAPDIR) {
729 /* mkdir .snap/foo is a MKSNAP */
730 op = CEPH_MDS_OP_MKSNAP;
731 dout("mksnap dir %p snap '%.*s' dn %p\n", dir,
732 dentry->d_name.len, dentry->d_name.name, dentry);
733 } else if (ceph_snap(dir) == CEPH_NOSNAP) {
734 dout("mkdir dir %p dn %p mode 0%o\n", dir, dentry, mode);
735 op = CEPH_MDS_OP_MKDIR;
736 } else {
737 goto out;
738 }
739 req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
740 if (IS_ERR(req)) {
741 err = PTR_ERR(req);
742 goto out;
743 }
744
745 req->r_dentry = dget(dentry);
746 req->r_num_caps = 2;
747 req->r_locked_dir = dir;
748 req->r_args.mkdir.mode = cpu_to_le32(mode);
749 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
750 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
751 err = ceph_mdsc_do_request(mdsc, dir, req);
752 if (!err && !req->r_reply_info.head->is_dentry)
753 err = ceph_handle_notrace_create(dir, dentry);
754 ceph_mdsc_put_request(req);
755 out:
756 if (err < 0)
757 d_drop(dentry);
758 return err;
759 }
760
761 static int ceph_link(struct dentry *old_dentry, struct inode *dir,
762 struct dentry *dentry)
763 {
764 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
765 struct ceph_mds_client *mdsc = fsc->mdsc;
766 struct ceph_mds_request *req;
767 int err;
768
769 if (ceph_snap(dir) != CEPH_NOSNAP)
770 return -EROFS;
771
772 dout("link in dir %p old_dentry %p dentry %p\n", dir,
773 old_dentry, dentry);
774 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS);
775 if (IS_ERR(req)) {
776 d_drop(dentry);
777 return PTR_ERR(req);
778 }
779 req->r_dentry = dget(dentry);
780 req->r_num_caps = 2;
781 req->r_old_dentry = dget(old_dentry); /* or inode? hrm. */
782 req->r_locked_dir = dir;
783 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
784 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
785 err = ceph_mdsc_do_request(mdsc, dir, req);
786 if (err)
787 d_drop(dentry);
788 else if (!req->r_reply_info.head->is_dentry)
789 d_instantiate(dentry, igrab(old_dentry->d_inode));
790 ceph_mdsc_put_request(req);
791 return err;
792 }
793
794 /*
795 * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it
796 * looks like the link count will hit 0, drop any other caps (other
797 * than PIN) we don't specifically want (due to the file still being
798 * open).
799 */
800 static int drop_caps_for_unlink(struct inode *inode)
801 {
802 struct ceph_inode_info *ci = ceph_inode(inode);
803 int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL;
804
805 spin_lock(&inode->i_lock);
806 if (inode->i_nlink == 1) {
807 drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN);
808 ci->i_ceph_flags |= CEPH_I_NODELAY;
809 }
810 spin_unlock(&inode->i_lock);
811 return drop;
812 }
813
814 /*
815 * rmdir and unlink are differ only by the metadata op code
816 */
817 static int ceph_unlink(struct inode *dir, struct dentry *dentry)
818 {
819 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
820 struct ceph_mds_client *mdsc = fsc->mdsc;
821 struct inode *inode = dentry->d_inode;
822 struct ceph_mds_request *req;
823 int err = -EROFS;
824 int op;
825
826 if (ceph_snap(dir) == CEPH_SNAPDIR) {
827 /* rmdir .snap/foo is RMSNAP */
828 dout("rmsnap dir %p '%.*s' dn %p\n", dir, dentry->d_name.len,
829 dentry->d_name.name, dentry);
830 op = CEPH_MDS_OP_RMSNAP;
831 } else if (ceph_snap(dir) == CEPH_NOSNAP) {
832 dout("unlink/rmdir dir %p dn %p inode %p\n",
833 dir, dentry, inode);
834 op = ((dentry->d_inode->i_mode & S_IFMT) == S_IFDIR) ?
835 CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK;
836 } else
837 goto out;
838 req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
839 if (IS_ERR(req)) {
840 err = PTR_ERR(req);
841 goto out;
842 }
843 req->r_dentry = dget(dentry);
844 req->r_num_caps = 2;
845 req->r_locked_dir = dir;
846 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
847 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
848 req->r_inode_drop = drop_caps_for_unlink(inode);
849 err = ceph_mdsc_do_request(mdsc, dir, req);
850 if (!err && !req->r_reply_info.head->is_dentry)
851 d_delete(dentry);
852 ceph_mdsc_put_request(req);
853 out:
854 return err;
855 }
856
857 static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
858 struct inode *new_dir, struct dentry *new_dentry)
859 {
860 struct ceph_fs_client *fsc = ceph_sb_to_client(old_dir->i_sb);
861 struct ceph_mds_client *mdsc = fsc->mdsc;
862 struct ceph_mds_request *req;
863 int err;
864
865 if (ceph_snap(old_dir) != ceph_snap(new_dir))
866 return -EXDEV;
867 if (ceph_snap(old_dir) != CEPH_NOSNAP ||
868 ceph_snap(new_dir) != CEPH_NOSNAP)
869 return -EROFS;
870 dout("rename dir %p dentry %p to dir %p dentry %p\n",
871 old_dir, old_dentry, new_dir, new_dentry);
872 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RENAME, USE_AUTH_MDS);
873 if (IS_ERR(req))
874 return PTR_ERR(req);
875 req->r_dentry = dget(new_dentry);
876 req->r_num_caps = 2;
877 req->r_old_dentry = dget(old_dentry);
878 req->r_locked_dir = new_dir;
879 req->r_old_dentry_drop = CEPH_CAP_FILE_SHARED;
880 req->r_old_dentry_unless = CEPH_CAP_FILE_EXCL;
881 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
882 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
883 /* release LINK_RDCACHE on source inode (mds will lock it) */
884 req->r_old_inode_drop = CEPH_CAP_LINK_SHARED;
885 if (new_dentry->d_inode)
886 req->r_inode_drop = drop_caps_for_unlink(new_dentry->d_inode);
887 err = ceph_mdsc_do_request(mdsc, old_dir, req);
888 if (!err && !req->r_reply_info.head->is_dentry) {
889 /*
890 * Normally d_move() is done by fill_trace (called by
891 * do_request, above). If there is no trace, we need
892 * to do it here.
893 */
894
895 /* d_move screws up d_subdirs order */
896 ceph_i_clear(new_dir, CEPH_I_COMPLETE);
897
898 d_move(old_dentry, new_dentry);
899
900 /* ensure target dentry is invalidated, despite
901 rehashing bug in vfs_rename_dir */
902 ceph_invalidate_dentry_lease(new_dentry);
903 }
904 ceph_mdsc_put_request(req);
905 return err;
906 }
907
908 /*
909 * Ensure a dentry lease will no longer revalidate.
910 */
911 void ceph_invalidate_dentry_lease(struct dentry *dentry)
912 {
913 spin_lock(&dentry->d_lock);
914 dentry->d_time = jiffies;
915 ceph_dentry(dentry)->lease_shared_gen = 0;
916 spin_unlock(&dentry->d_lock);
917 }
918
919 /*
920 * Check if dentry lease is valid. If not, delete the lease. Try to
921 * renew if the least is more than half up.
922 */
923 static int dentry_lease_is_valid(struct dentry *dentry)
924 {
925 struct ceph_dentry_info *di;
926 struct ceph_mds_session *s;
927 int valid = 0;
928 u32 gen;
929 unsigned long ttl;
930 struct ceph_mds_session *session = NULL;
931 struct inode *dir = NULL;
932 u32 seq = 0;
933
934 spin_lock(&dentry->d_lock);
935 di = ceph_dentry(dentry);
936 if (di && di->lease_session) {
937 s = di->lease_session;
938 spin_lock(&s->s_cap_lock);
939 gen = s->s_cap_gen;
940 ttl = s->s_cap_ttl;
941 spin_unlock(&s->s_cap_lock);
942
943 if (di->lease_gen == gen &&
944 time_before(jiffies, dentry->d_time) &&
945 time_before(jiffies, ttl)) {
946 valid = 1;
947 if (di->lease_renew_after &&
948 time_after(jiffies, di->lease_renew_after)) {
949 /* we should renew */
950 dir = dentry->d_parent->d_inode;
951 session = ceph_get_mds_session(s);
952 seq = di->lease_seq;
953 di->lease_renew_after = 0;
954 di->lease_renew_from = jiffies;
955 }
956 }
957 }
958 spin_unlock(&dentry->d_lock);
959
960 if (session) {
961 ceph_mdsc_lease_send_msg(session, dir, dentry,
962 CEPH_MDS_LEASE_RENEW, seq);
963 ceph_put_mds_session(session);
964 }
965 dout("dentry_lease_is_valid - dentry %p = %d\n", dentry, valid);
966 return valid;
967 }
968
969 /*
970 * Check if directory-wide content lease/cap is valid.
971 */
972 static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry)
973 {
974 struct ceph_inode_info *ci = ceph_inode(dir);
975 struct ceph_dentry_info *di = ceph_dentry(dentry);
976 int valid = 0;
977
978 spin_lock(&dir->i_lock);
979 if (ci->i_shared_gen == di->lease_shared_gen)
980 valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1);
981 spin_unlock(&dir->i_lock);
982 dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n",
983 dir, (unsigned)ci->i_shared_gen, dentry,
984 (unsigned)di->lease_shared_gen, valid);
985 return valid;
986 }
987
988 /*
989 * Check if cached dentry can be trusted.
990 */
991 static int ceph_d_revalidate(struct dentry *dentry, struct nameidata *nd)
992 {
993 struct inode *dir;
994
995 if (nd->flags & LOOKUP_RCU)
996 return -ECHILD;
997
998 dir = dentry->d_parent->d_inode;
999
1000 dout("d_revalidate %p '%.*s' inode %p offset %lld\n", dentry,
1001 dentry->d_name.len, dentry->d_name.name, dentry->d_inode,
1002 ceph_dentry(dentry)->offset);
1003
1004 /* always trust cached snapped dentries, snapdir dentry */
1005 if (ceph_snap(dir) != CEPH_NOSNAP) {
1006 dout("d_revalidate %p '%.*s' inode %p is SNAPPED\n", dentry,
1007 dentry->d_name.len, dentry->d_name.name, dentry->d_inode);
1008 goto out_touch;
1009 }
1010 if (dentry->d_inode && ceph_snap(dentry->d_inode) == CEPH_SNAPDIR)
1011 goto out_touch;
1012
1013 if (dentry_lease_is_valid(dentry) ||
1014 dir_lease_is_valid(dir, dentry))
1015 goto out_touch;
1016
1017 dout("d_revalidate %p invalid\n", dentry);
1018 d_drop(dentry);
1019 return 0;
1020 out_touch:
1021 ceph_dentry_lru_touch(dentry);
1022 return 1;
1023 }
1024
1025 /*
1026 * When a dentry is released, clear the dir I_COMPLETE if it was part
1027 * of the current dir gen or if this is in the snapshot namespace.
1028 */
1029 static void ceph_dentry_release(struct dentry *dentry)
1030 {
1031 struct ceph_dentry_info *di = ceph_dentry(dentry);
1032 struct inode *parent_inode = NULL;
1033 u64 snapid = CEPH_NOSNAP;
1034
1035 if (!IS_ROOT(dentry)) {
1036 parent_inode = dentry->d_parent->d_inode;
1037 if (parent_inode)
1038 snapid = ceph_snap(parent_inode);
1039 }
1040 dout("dentry_release %p parent %p\n", dentry, parent_inode);
1041 if (parent_inode && snapid != CEPH_SNAPDIR) {
1042 struct ceph_inode_info *ci = ceph_inode(parent_inode);
1043
1044 spin_lock(&parent_inode->i_lock);
1045 if (ci->i_shared_gen == di->lease_shared_gen ||
1046 snapid <= CEPH_MAXSNAP) {
1047 dout(" clearing %p complete (d_release)\n",
1048 parent_inode);
1049 ci->i_ceph_flags &= ~CEPH_I_COMPLETE;
1050 ci->i_release_count++;
1051 }
1052 spin_unlock(&parent_inode->i_lock);
1053 }
1054 if (di) {
1055 ceph_dentry_lru_del(dentry);
1056 if (di->lease_session)
1057 ceph_put_mds_session(di->lease_session);
1058 kmem_cache_free(ceph_dentry_cachep, di);
1059 dentry->d_fsdata = NULL;
1060 }
1061 }
1062
1063 static int ceph_snapdir_d_revalidate(struct dentry *dentry,
1064 struct nameidata *nd)
1065 {
1066 /*
1067 * Eventually, we'll want to revalidate snapped metadata
1068 * too... probably...
1069 */
1070 return 1;
1071 }
1072
1073
1074
1075 /*
1076 * read() on a dir. This weird interface hack only works if mounted
1077 * with '-o dirstat'.
1078 */
1079 static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
1080 loff_t *ppos)
1081 {
1082 struct ceph_file_info *cf = file->private_data;
1083 struct inode *inode = file->f_dentry->d_inode;
1084 struct ceph_inode_info *ci = ceph_inode(inode);
1085 int left;
1086
1087 if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT))
1088 return -EISDIR;
1089
1090 if (!cf->dir_info) {
1091 cf->dir_info = kmalloc(1024, GFP_NOFS);
1092 if (!cf->dir_info)
1093 return -ENOMEM;
1094 cf->dir_info_len =
1095 sprintf(cf->dir_info,
1096 "entries: %20lld\n"
1097 " files: %20lld\n"
1098 " subdirs: %20lld\n"
1099 "rentries: %20lld\n"
1100 " rfiles: %20lld\n"
1101 " rsubdirs: %20lld\n"
1102 "rbytes: %20lld\n"
1103 "rctime: %10ld.%09ld\n",
1104 ci->i_files + ci->i_subdirs,
1105 ci->i_files,
1106 ci->i_subdirs,
1107 ci->i_rfiles + ci->i_rsubdirs,
1108 ci->i_rfiles,
1109 ci->i_rsubdirs,
1110 ci->i_rbytes,
1111 (long)ci->i_rctime.tv_sec,
1112 (long)ci->i_rctime.tv_nsec);
1113 }
1114
1115 if (*ppos >= cf->dir_info_len)
1116 return 0;
1117 size = min_t(unsigned, size, cf->dir_info_len-*ppos);
1118 left = copy_to_user(buf, cf->dir_info + *ppos, size);
1119 if (left == size)
1120 return -EFAULT;
1121 *ppos += (size - left);
1122 return size - left;
1123 }
1124
1125 /*
1126 * an fsync() on a dir will wait for any uncommitted directory
1127 * operations to commit.
1128 */
1129 static int ceph_dir_fsync(struct file *file, int datasync)
1130 {
1131 struct inode *inode = file->f_path.dentry->d_inode;
1132 struct ceph_inode_info *ci = ceph_inode(inode);
1133 struct list_head *head = &ci->i_unsafe_dirops;
1134 struct ceph_mds_request *req;
1135 u64 last_tid;
1136 int ret = 0;
1137
1138 dout("dir_fsync %p\n", inode);
1139 spin_lock(&ci->i_unsafe_lock);
1140 if (list_empty(head))
1141 goto out;
1142
1143 req = list_entry(head->prev,
1144 struct ceph_mds_request, r_unsafe_dir_item);
1145 last_tid = req->r_tid;
1146
1147 do {
1148 ceph_mdsc_get_request(req);
1149 spin_unlock(&ci->i_unsafe_lock);
1150 dout("dir_fsync %p wait on tid %llu (until %llu)\n",
1151 inode, req->r_tid, last_tid);
1152 if (req->r_timeout) {
1153 ret = wait_for_completion_timeout(
1154 &req->r_safe_completion, req->r_timeout);
1155 if (ret > 0)
1156 ret = 0;
1157 else if (ret == 0)
1158 ret = -EIO; /* timed out */
1159 } else {
1160 wait_for_completion(&req->r_safe_completion);
1161 }
1162 spin_lock(&ci->i_unsafe_lock);
1163 ceph_mdsc_put_request(req);
1164
1165 if (ret || list_empty(head))
1166 break;
1167 req = list_entry(head->next,
1168 struct ceph_mds_request, r_unsafe_dir_item);
1169 } while (req->r_tid < last_tid);
1170 out:
1171 spin_unlock(&ci->i_unsafe_lock);
1172 return ret;
1173 }
1174
1175 /*
1176 * We maintain a private dentry LRU.
1177 *
1178 * FIXME: this needs to be changed to a per-mds lru to be useful.
1179 */
1180 void ceph_dentry_lru_add(struct dentry *dn)
1181 {
1182 struct ceph_dentry_info *di = ceph_dentry(dn);
1183 struct ceph_mds_client *mdsc;
1184
1185 dout("dentry_lru_add %p %p '%.*s'\n", di, dn,
1186 dn->d_name.len, dn->d_name.name);
1187 if (di) {
1188 mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
1189 spin_lock(&mdsc->dentry_lru_lock);
1190 list_add_tail(&di->lru, &mdsc->dentry_lru);
1191 mdsc->num_dentry++;
1192 spin_unlock(&mdsc->dentry_lru_lock);
1193 }
1194 }
1195
1196 void ceph_dentry_lru_touch(struct dentry *dn)
1197 {
1198 struct ceph_dentry_info *di = ceph_dentry(dn);
1199 struct ceph_mds_client *mdsc;
1200
1201 dout("dentry_lru_touch %p %p '%.*s' (offset %lld)\n", di, dn,
1202 dn->d_name.len, dn->d_name.name, di->offset);
1203 if (di) {
1204 mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
1205 spin_lock(&mdsc->dentry_lru_lock);
1206 list_move_tail(&di->lru, &mdsc->dentry_lru);
1207 spin_unlock(&mdsc->dentry_lru_lock);
1208 }
1209 }
1210
1211 void ceph_dentry_lru_del(struct dentry *dn)
1212 {
1213 struct ceph_dentry_info *di = ceph_dentry(dn);
1214 struct ceph_mds_client *mdsc;
1215
1216 dout("dentry_lru_del %p %p '%.*s'\n", di, dn,
1217 dn->d_name.len, dn->d_name.name);
1218 if (di) {
1219 mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
1220 spin_lock(&mdsc->dentry_lru_lock);
1221 list_del_init(&di->lru);
1222 mdsc->num_dentry--;
1223 spin_unlock(&mdsc->dentry_lru_lock);
1224 }
1225 }
1226
1227 /*
1228 * Return name hash for a given dentry. This is dependent on
1229 * the parent directory's hash function.
1230 */
1231 unsigned ceph_dentry_hash(struct dentry *dn)
1232 {
1233 struct inode *dir = dn->d_parent->d_inode;
1234 struct ceph_inode_info *dci = ceph_inode(dir);
1235
1236 switch (dci->i_dir_layout.dl_dir_hash) {
1237 case 0: /* for backward compat */
1238 case CEPH_STR_HASH_LINUX:
1239 return dn->d_name.hash;
1240
1241 default:
1242 return ceph_str_hash(dci->i_dir_layout.dl_dir_hash,
1243 dn->d_name.name, dn->d_name.len);
1244 }
1245 }
1246
1247 const struct file_operations ceph_dir_fops = {
1248 .read = ceph_read_dir,
1249 .readdir = ceph_readdir,
1250 .llseek = ceph_dir_llseek,
1251 .open = ceph_open,
1252 .release = ceph_release,
1253 .unlocked_ioctl = ceph_ioctl,
1254 .fsync = ceph_dir_fsync,
1255 };
1256
1257 const struct inode_operations ceph_dir_iops = {
1258 .lookup = ceph_lookup,
1259 .permission = ceph_permission,
1260 .getattr = ceph_getattr,
1261 .setattr = ceph_setattr,
1262 .setxattr = ceph_setxattr,
1263 .getxattr = ceph_getxattr,
1264 .listxattr = ceph_listxattr,
1265 .removexattr = ceph_removexattr,
1266 .mknod = ceph_mknod,
1267 .symlink = ceph_symlink,
1268 .mkdir = ceph_mkdir,
1269 .link = ceph_link,
1270 .unlink = ceph_unlink,
1271 .rmdir = ceph_unlink,
1272 .rename = ceph_rename,
1273 .create = ceph_create,
1274 };
1275
1276 const struct dentry_operations ceph_dentry_ops = {
1277 .d_revalidate = ceph_d_revalidate,
1278 .d_release = ceph_dentry_release,
1279 };
1280
1281 const struct dentry_operations ceph_snapdir_dentry_ops = {
1282 .d_revalidate = ceph_snapdir_d_revalidate,
1283 .d_release = ceph_dentry_release,
1284 };
1285
1286 const struct dentry_operations ceph_snap_dentry_ops = {
1287 .d_release = ceph_dentry_release,
1288 };