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fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ceph / dir.c
blob1065ac779840ac4bb4c7f740c47c1ec33ef79787
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 ceph_translate_ino(dentry->d_sb, 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 ceph_translate_ino(inode->i_sb, inode->i_ino),
249 inode->i_mode >> 12) < 0)
250 return 0;
251 filp->f_pos = 1;
252 off = 1;
253 }
254 if (filp->f_pos == 1) {
255 ino_t ino = parent_ino(filp->f_dentry);
256 dout("readdir off 1 -> '..'\n");
257 if (filldir(dirent, "..", 2, ceph_make_fpos(0, 1),
258 ceph_translate_ino(inode->i_sb, ino),
259 inode->i_mode >> 12) < 0)
260 return 0;
261 filp->f_pos = 2;
262 off = 2;
263 }
264
265 /* can we use the dcache? */
266 spin_lock(&inode->i_lock);
267 if ((filp->f_pos == 2 || fi->dentry) &&
268 !ceph_test_mount_opt(fsc, NOASYNCREADDIR) &&
269 ceph_snap(inode) != CEPH_SNAPDIR &&
270 (ci->i_ceph_flags & CEPH_I_COMPLETE) &&
271 __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) {
272 spin_unlock(&inode->i_lock);
273 err = __dcache_readdir(filp, dirent, filldir);
274 if (err != -EAGAIN)
275 return err;
276 } else {
277 spin_unlock(&inode->i_lock);
278 }
279 if (fi->dentry) {
280 err = note_last_dentry(fi, fi->dentry->d_name.name,
281 fi->dentry->d_name.len);
282 if (err)
283 return err;
284 dput(fi->dentry);
285 fi->dentry = NULL;
286 }
287
288 /* proceed with a normal readdir */
289
290 more:
291 /* do we have the correct frag content buffered? */
292 if (fi->frag != frag || fi->last_readdir == NULL) {
293 struct ceph_mds_request *req;
294 int op = ceph_snap(inode) == CEPH_SNAPDIR ?
295 CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR;
296
297 /* discard old result, if any */
298 if (fi->last_readdir) {
299 ceph_mdsc_put_request(fi->last_readdir);
300 fi->last_readdir = NULL;
301 }
302
303 /* requery frag tree, as the frag topology may have changed */
304 frag = ceph_choose_frag(ceph_inode(inode), frag, NULL, NULL);
305
306 dout("readdir fetching %llx.%llx frag %x offset '%s'\n",
307 ceph_vinop(inode), frag, fi->last_name);
308 req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
309 if (IS_ERR(req))
310 return PTR_ERR(req);
311 req->r_inode = inode;
312 ihold(inode);
313 req->r_dentry = dget(filp->f_dentry);
314 /* hints to request -> mds selection code */
315 req->r_direct_mode = USE_AUTH_MDS;
316 req->r_direct_hash = ceph_frag_value(frag);
317 req->r_direct_is_hash = true;
318 req->r_path2 = kstrdup(fi->last_name, GFP_NOFS);
319 req->r_readdir_offset = fi->next_offset;
320 req->r_args.readdir.frag = cpu_to_le32(frag);
321 req->r_args.readdir.max_entries = cpu_to_le32(max_entries);
322 req->r_args.readdir.max_bytes = cpu_to_le32(max_bytes);
323 req->r_num_caps = max_entries + 1;
324 err = ceph_mdsc_do_request(mdsc, NULL, req);
325 if (err < 0) {
326 ceph_mdsc_put_request(req);
327 return err;
328 }
329 dout("readdir got and parsed readdir result=%d"
330 " on frag %x, end=%d, complete=%d\n", err, frag,
331 (int)req->r_reply_info.dir_end,
332 (int)req->r_reply_info.dir_complete);
333
334 if (!req->r_did_prepopulate) {
335 dout("readdir !did_prepopulate");
336 fi->dir_release_count--; /* preclude I_COMPLETE */
337 }
338
339 /* note next offset and last dentry name */
340 fi->offset = fi->next_offset;
341 fi->last_readdir = req;
342
343 if (req->r_reply_info.dir_end) {
344 kfree(fi->last_name);
345 fi->last_name = NULL;
346 if (ceph_frag_is_rightmost(frag))
347 fi->next_offset = 2;
348 else
349 fi->next_offset = 0;
350 } else {
351 rinfo = &req->r_reply_info;
352 err = note_last_dentry(fi,
353 rinfo->dir_dname[rinfo->dir_nr-1],
354 rinfo->dir_dname_len[rinfo->dir_nr-1]);
355 if (err)
356 return err;
357 fi->next_offset += rinfo->dir_nr;
358 }
359 }
360
361 rinfo = &fi->last_readdir->r_reply_info;
362 dout("readdir frag %x num %d off %d chunkoff %d\n", frag,
363 rinfo->dir_nr, off, fi->offset);
364 while (off >= fi->offset && off - fi->offset < rinfo->dir_nr) {
365 u64 pos = ceph_make_fpos(frag, off);
366 struct ceph_mds_reply_inode *in =
367 rinfo->dir_in[off - fi->offset].in;
368 struct ceph_vino vino;
369 ino_t ino;
370
371 dout("readdir off %d (%d/%d) -> %lld '%.*s' %p\n",
372 off, off - fi->offset, rinfo->dir_nr, pos,
373 rinfo->dir_dname_len[off - fi->offset],
374 rinfo->dir_dname[off - fi->offset], in);
375 BUG_ON(!in);
376 ftype = le32_to_cpu(in->mode) >> 12;
377 vino.ino = le64_to_cpu(in->ino);
378 vino.snap = le64_to_cpu(in->snapid);
379 ino = ceph_vino_to_ino(vino);
380 if (filldir(dirent,
381 rinfo->dir_dname[off - fi->offset],
382 rinfo->dir_dname_len[off - fi->offset],
383 pos,
384 ceph_translate_ino(inode->i_sb, ino), ftype) < 0) {
385 dout("filldir stopping us...\n");
386 return 0;
387 }
388 off++;
389 filp->f_pos = pos + 1;
390 }
391
392 if (fi->last_name) {
393 ceph_mdsc_put_request(fi->last_readdir);
394 fi->last_readdir = NULL;
395 goto more;
396 }
397
398 /* more frags? */
399 if (!ceph_frag_is_rightmost(frag)) {
400 frag = ceph_frag_next(frag);
401 off = 0;
402 filp->f_pos = ceph_make_fpos(frag, off);
403 dout("readdir next frag is %x\n", frag);
404 goto more;
405 }
406 fi->at_end = 1;
407
408 /*
409 * if dir_release_count still matches the dir, no dentries
410 * were released during the whole readdir, and we should have
411 * the complete dir contents in our cache.
412 */
413 spin_lock(&inode->i_lock);
414 if (ci->i_release_count == fi->dir_release_count) {
415 dout(" marking %p complete\n", inode);
416 /* ci->i_ceph_flags |= CEPH_I_COMPLETE; */
417 ci->i_max_offset = filp->f_pos;
418 }
419 spin_unlock(&inode->i_lock);
420
421 dout("readdir %p filp %p done.\n", inode, filp);
422 return 0;
423 }
424
425 static void reset_readdir(struct ceph_file_info *fi)
426 {
427 if (fi->last_readdir) {
428 ceph_mdsc_put_request(fi->last_readdir);
429 fi->last_readdir = NULL;
430 }
431 kfree(fi->last_name);
432 fi->last_name = NULL;
433 fi->next_offset = 2; /* compensate for . and .. */
434 if (fi->dentry) {
435 dput(fi->dentry);
436 fi->dentry = NULL;
437 }
438 fi->at_end = 0;
439 }
440
441 static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int origin)
442 {
443 struct ceph_file_info *fi = file->private_data;
444 struct inode *inode = file->f_mapping->host;
445 loff_t old_offset = offset;
446 loff_t retval;
447
448 mutex_lock(&inode->i_mutex);
449 retval = -EINVAL;
450 switch (origin) {
451 case SEEK_END:
452 offset += inode->i_size + 2; /* FIXME */
453 break;
454 case SEEK_CUR:
455 offset += file->f_pos;
456 case SEEK_SET:
457 break;
458 default:
459 goto out;
460 }
461
462 if (offset >= 0 && offset <= inode->i_sb->s_maxbytes) {
463 if (offset != file->f_pos) {
464 file->f_pos = offset;
465 file->f_version = 0;
466 fi->at_end = 0;
467 }
468 retval = offset;
469
470 /*
471 * discard buffered readdir content on seekdir(0), or
472 * seek to new frag, or seek prior to current chunk.
473 */
474 if (offset == 0 ||
475 fpos_frag(offset) != fpos_frag(old_offset) ||
476 fpos_off(offset) < fi->offset) {
477 dout("dir_llseek dropping %p content\n", file);
478 reset_readdir(fi);
479 }
480
481 /* bump dir_release_count if we did a forward seek */
482 if (offset > old_offset)
483 fi->dir_release_count--;
484 }
485 out:
486 mutex_unlock(&inode->i_mutex);
487 return retval;
488 }
489
490 /*
491 * Process result of a lookup/open request.
492 *
493 * Mainly, make sure we return the final req->r_dentry (if it already
494 * existed) in place of the original VFS-provided dentry when they
495 * differ.
496 *
497 * Gracefully handle the case where the MDS replies with -ENOENT and
498 * no trace (which it may do, at its discretion, e.g., if it doesn't
499 * care to issue a lease on the negative dentry).
500 */
501 struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
502 struct dentry *dentry, int err)
503 {
504 struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
505 struct inode *parent = dentry->d_parent->d_inode;
506
507 /* .snap dir? */
508 if (err == -ENOENT &&
509 ceph_snap(parent) == CEPH_NOSNAP &&
510 strcmp(dentry->d_name.name,
511 fsc->mount_options->snapdir_name) == 0) {
512 struct inode *inode = ceph_get_snapdir(parent);
513 dout("ENOENT on snapdir %p '%.*s', linking to snapdir %p\n",
514 dentry, dentry->d_name.len, dentry->d_name.name, inode);
515 BUG_ON(!d_unhashed(dentry));
516 d_add(dentry, inode);
517 err = 0;
518 }
519
520 if (err == -ENOENT) {
521 /* no trace? */
522 err = 0;
523 if (!req->r_reply_info.head->is_dentry) {
524 dout("ENOENT and no trace, dentry %p inode %p\n",
525 dentry, dentry->d_inode);
526 if (dentry->d_inode) {
527 d_drop(dentry);
528 err = -ENOENT;
529 } else {
530 d_add(dentry, NULL);
531 }
532 }
533 }
534 if (err)
535 dentry = ERR_PTR(err);
536 else if (dentry != req->r_dentry)
537 dentry = dget(req->r_dentry); /* we got spliced */
538 else
539 dentry = NULL;
540 return dentry;
541 }
542
543 static int is_root_ceph_dentry(struct inode *inode, struct dentry *dentry)
544 {
545 return ceph_ino(inode) == CEPH_INO_ROOT &&
546 strncmp(dentry->d_name.name, ".ceph", 5) == 0;
547 }
548
549 /*
550 * Look up a single dir entry. If there is a lookup intent, inform
551 * the MDS so that it gets our 'caps wanted' value in a single op.
552 */
553 static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
554 struct nameidata *nd)
555 {
556 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
557 struct ceph_mds_client *mdsc = fsc->mdsc;
558 struct ceph_mds_request *req;
559 int op;
560 int err;
561
562 dout("lookup %p dentry %p '%.*s'\n",
563 dir, dentry, dentry->d_name.len, dentry->d_name.name);
564
565 if (dentry->d_name.len > NAME_MAX)
566 return ERR_PTR(-ENAMETOOLONG);
567
568 err = ceph_init_dentry(dentry);
569 if (err < 0)
570 return ERR_PTR(err);
571
572 /* open (but not create!) intent? */
573 if (nd &&
574 (nd->flags & LOOKUP_OPEN) &&
575 !(nd->intent.open.flags & O_CREAT)) {
576 int mode = nd->intent.open.create_mode & ~current->fs->umask;
577 return ceph_lookup_open(dir, dentry, nd, mode, 1);
578 }
579
580 /* can we conclude ENOENT locally? */
581 if (dentry->d_inode == NULL) {
582 struct ceph_inode_info *ci = ceph_inode(dir);
583 struct ceph_dentry_info *di = ceph_dentry(dentry);
584
585 spin_lock(&dir->i_lock);
586 dout(" dir %p flags are %d\n", dir, ci->i_ceph_flags);
587 if (strncmp(dentry->d_name.name,
588 fsc->mount_options->snapdir_name,
589 dentry->d_name.len) &&
590 !is_root_ceph_dentry(dir, dentry) &&
591 (ci->i_ceph_flags & CEPH_I_COMPLETE) &&
592 (__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) {
593 spin_unlock(&dir->i_lock);
594 dout(" dir %p complete, -ENOENT\n", dir);
595 d_add(dentry, NULL);
596 di->lease_shared_gen = ci->i_shared_gen;
597 return NULL;
598 }
599 spin_unlock(&dir->i_lock);
600 }
601
602 op = ceph_snap(dir) == CEPH_SNAPDIR ?
603 CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP;
604 req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS);
605 if (IS_ERR(req))
606 return ERR_CAST(req);
607 req->r_dentry = dget(dentry);
608 req->r_num_caps = 2;
609 /* we only need inode linkage */
610 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
611 req->r_locked_dir = dir;
612 err = ceph_mdsc_do_request(mdsc, NULL, req);
613 dentry = ceph_finish_lookup(req, dentry, err);
614 ceph_mdsc_put_request(req); /* will dput(dentry) */
615 dout("lookup result=%p\n", dentry);
616 return dentry;
617 }
618
619 /*
620 * If we do a create but get no trace back from the MDS, follow up with
621 * a lookup (the VFS expects us to link up the provided dentry).
622 */
623 int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry)
624 {
625 struct dentry *result = ceph_lookup(dir, dentry, NULL);
626
627 if (result && !IS_ERR(result)) {
628 /*
629 * We created the item, then did a lookup, and found
630 * it was already linked to another inode we already
631 * had in our cache (and thus got spliced). Link our
632 * dentry to that inode, but don't hash it, just in
633 * case the VFS wants to dereference it.
634 */
635 BUG_ON(!result->d_inode);
636 d_instantiate(dentry, result->d_inode);
637 return 0;
638 }
639 return PTR_ERR(result);
640 }
641
642 static int ceph_mknod(struct inode *dir, struct dentry *dentry,
643 int mode, dev_t rdev)
644 {
645 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
646 struct ceph_mds_client *mdsc = fsc->mdsc;
647 struct ceph_mds_request *req;
648 int err;
649
650 if (ceph_snap(dir) != CEPH_NOSNAP)
651 return -EROFS;
652
653 dout("mknod in dir %p dentry %p mode 0%o rdev %d\n",
654 dir, dentry, mode, rdev);
655 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS);
656 if (IS_ERR(req)) {
657 d_drop(dentry);
658 return PTR_ERR(req);
659 }
660 req->r_dentry = dget(dentry);
661 req->r_num_caps = 2;
662 req->r_locked_dir = dir;
663 req->r_args.mknod.mode = cpu_to_le32(mode);
664 req->r_args.mknod.rdev = cpu_to_le32(rdev);
665 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
666 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
667 err = ceph_mdsc_do_request(mdsc, dir, req);
668 if (!err && !req->r_reply_info.head->is_dentry)
669 err = ceph_handle_notrace_create(dir, dentry);
670 ceph_mdsc_put_request(req);
671 if (err)
672 d_drop(dentry);
673 return err;
674 }
675
676 static int ceph_create(struct inode *dir, struct dentry *dentry, int mode,
677 struct nameidata *nd)
678 {
679 dout("create in dir %p dentry %p name '%.*s'\n",
680 dir, dentry, dentry->d_name.len, dentry->d_name.name);
681
682 if (ceph_snap(dir) != CEPH_NOSNAP)
683 return -EROFS;
684
685 if (nd) {
686 BUG_ON((nd->flags & LOOKUP_OPEN) == 0);
687 dentry = ceph_lookup_open(dir, dentry, nd, mode, 0);
688 /* hrm, what should i do here if we get aliased? */
689 if (IS_ERR(dentry))
690 return PTR_ERR(dentry);
691 return 0;
692 }
693
694 /* fall back to mknod */
695 return ceph_mknod(dir, dentry, (mode & ~S_IFMT) | S_IFREG, 0);
696 }
697
698 static int ceph_symlink(struct inode *dir, struct dentry *dentry,
699 const char *dest)
700 {
701 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
702 struct ceph_mds_client *mdsc = fsc->mdsc;
703 struct ceph_mds_request *req;
704 int err;
705
706 if (ceph_snap(dir) != CEPH_NOSNAP)
707 return -EROFS;
708
709 dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest);
710 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS);
711 if (IS_ERR(req)) {
712 d_drop(dentry);
713 return PTR_ERR(req);
714 }
715 req->r_dentry = dget(dentry);
716 req->r_num_caps = 2;
717 req->r_path2 = kstrdup(dest, GFP_NOFS);
718 req->r_locked_dir = dir;
719 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
720 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
721 err = ceph_mdsc_do_request(mdsc, dir, req);
722 if (!err && !req->r_reply_info.head->is_dentry)
723 err = ceph_handle_notrace_create(dir, dentry);
724 ceph_mdsc_put_request(req);
725 if (err)
726 d_drop(dentry);
727 return err;
728 }
729
730 static int ceph_mkdir(struct inode *dir, struct dentry *dentry, int mode)
731 {
732 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
733 struct ceph_mds_client *mdsc = fsc->mdsc;
734 struct ceph_mds_request *req;
735 int err = -EROFS;
736 int op;
737
738 if (ceph_snap(dir) == CEPH_SNAPDIR) {
739 /* mkdir .snap/foo is a MKSNAP */
740 op = CEPH_MDS_OP_MKSNAP;
741 dout("mksnap dir %p snap '%.*s' dn %p\n", dir,
742 dentry->d_name.len, dentry->d_name.name, dentry);
743 } else if (ceph_snap(dir) == CEPH_NOSNAP) {
744 dout("mkdir dir %p dn %p mode 0%o\n", dir, dentry, mode);
745 op = CEPH_MDS_OP_MKDIR;
746 } else {
747 goto out;
748 }
749 req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
750 if (IS_ERR(req)) {
751 err = PTR_ERR(req);
752 goto out;
753 }
754
755 req->r_dentry = dget(dentry);
756 req->r_num_caps = 2;
757 req->r_locked_dir = dir;
758 req->r_args.mkdir.mode = cpu_to_le32(mode);
759 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
760 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
761 err = ceph_mdsc_do_request(mdsc, dir, req);
762 if (!err && !req->r_reply_info.head->is_dentry)
763 err = ceph_handle_notrace_create(dir, dentry);
764 ceph_mdsc_put_request(req);
765 out:
766 if (err < 0)
767 d_drop(dentry);
768 return err;
769 }
770
771 static int ceph_link(struct dentry *old_dentry, struct inode *dir,
772 struct dentry *dentry)
773 {
774 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
775 struct ceph_mds_client *mdsc = fsc->mdsc;
776 struct ceph_mds_request *req;
777 int err;
778
779 if (ceph_snap(dir) != CEPH_NOSNAP)
780 return -EROFS;
781
782 dout("link in dir %p old_dentry %p dentry %p\n", dir,
783 old_dentry, dentry);
784 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS);
785 if (IS_ERR(req)) {
786 d_drop(dentry);
787 return PTR_ERR(req);
788 }
789 req->r_dentry = dget(dentry);
790 req->r_num_caps = 2;
791 req->r_old_dentry = dget(old_dentry); /* or inode? hrm. */
792 req->r_locked_dir = dir;
793 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
794 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
795 err = ceph_mdsc_do_request(mdsc, dir, req);
796 if (err) {
797 d_drop(dentry);
798 } else if (!req->r_reply_info.head->is_dentry) {
799 ihold(old_dentry->d_inode);
800 d_instantiate(dentry, old_dentry->d_inode);
801 }
802 ceph_mdsc_put_request(req);
803 return err;
804 }
805
806 /*
807 * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it
808 * looks like the link count will hit 0, drop any other caps (other
809 * than PIN) we don't specifically want (due to the file still being
810 * open).
811 */
812 static int drop_caps_for_unlink(struct inode *inode)
813 {
814 struct ceph_inode_info *ci = ceph_inode(inode);
815 int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL;
816
817 spin_lock(&inode->i_lock);
818 if (inode->i_nlink == 1) {
819 drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN);
820 ci->i_ceph_flags |= CEPH_I_NODELAY;
821 }
822 spin_unlock(&inode->i_lock);
823 return drop;
824 }
825
826 /*
827 * rmdir and unlink are differ only by the metadata op code
828 */
829 static int ceph_unlink(struct inode *dir, struct dentry *dentry)
830 {
831 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
832 struct ceph_mds_client *mdsc = fsc->mdsc;
833 struct inode *inode = dentry->d_inode;
834 struct ceph_mds_request *req;
835 int err = -EROFS;
836 int op;
837
838 if (ceph_snap(dir) == CEPH_SNAPDIR) {
839 /* rmdir .snap/foo is RMSNAP */
840 dout("rmsnap dir %p '%.*s' dn %p\n", dir, dentry->d_name.len,
841 dentry->d_name.name, dentry);
842 op = CEPH_MDS_OP_RMSNAP;
843 } else if (ceph_snap(dir) == CEPH_NOSNAP) {
844 dout("unlink/rmdir dir %p dn %p inode %p\n",
845 dir, dentry, inode);
846 op = ((dentry->d_inode->i_mode & S_IFMT) == S_IFDIR) ?
847 CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK;
848 } else
849 goto out;
850 req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
851 if (IS_ERR(req)) {
852 err = PTR_ERR(req);
853 goto out;
854 }
855 req->r_dentry = dget(dentry);
856 req->r_num_caps = 2;
857 req->r_locked_dir = dir;
858 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
859 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
860 req->r_inode_drop = drop_caps_for_unlink(inode);
861 err = ceph_mdsc_do_request(mdsc, dir, req);
862 if (!err && !req->r_reply_info.head->is_dentry)
863 d_delete(dentry);
864 ceph_mdsc_put_request(req);
865 out:
866 return err;
867 }
868
869 static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
870 struct inode *new_dir, struct dentry *new_dentry)
871 {
872 struct ceph_fs_client *fsc = ceph_sb_to_client(old_dir->i_sb);
873 struct ceph_mds_client *mdsc = fsc->mdsc;
874 struct ceph_mds_request *req;
875 int err;
876
877 if (ceph_snap(old_dir) != ceph_snap(new_dir))
878 return -EXDEV;
879 if (ceph_snap(old_dir) != CEPH_NOSNAP ||
880 ceph_snap(new_dir) != CEPH_NOSNAP)
881 return -EROFS;
882 dout("rename dir %p dentry %p to dir %p dentry %p\n",
883 old_dir, old_dentry, new_dir, new_dentry);
884 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RENAME, USE_AUTH_MDS);
885 if (IS_ERR(req))
886 return PTR_ERR(req);
887 req->r_dentry = dget(new_dentry);
888 req->r_num_caps = 2;
889 req->r_old_dentry = dget(old_dentry);
890 req->r_locked_dir = new_dir;
891 req->r_old_dentry_drop = CEPH_CAP_FILE_SHARED;
892 req->r_old_dentry_unless = CEPH_CAP_FILE_EXCL;
893 req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
894 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
895 /* release LINK_RDCACHE on source inode (mds will lock it) */
896 req->r_old_inode_drop = CEPH_CAP_LINK_SHARED;
897 if (new_dentry->d_inode)
898 req->r_inode_drop = drop_caps_for_unlink(new_dentry->d_inode);
899 err = ceph_mdsc_do_request(mdsc, old_dir, req);
900 if (!err && !req->r_reply_info.head->is_dentry) {
901 /*
902 * Normally d_move() is done by fill_trace (called by
903 * do_request, above). If there is no trace, we need
904 * to do it here.
905 */
906
907 /* d_move screws up d_subdirs order */
908 ceph_i_clear(new_dir, CEPH_I_COMPLETE);
909
910 d_move(old_dentry, new_dentry);
911
912 /* ensure target dentry is invalidated, despite
913 rehashing bug in vfs_rename_dir */
914 ceph_invalidate_dentry_lease(new_dentry);
915 }
916 ceph_mdsc_put_request(req);
917 return err;
918 }
919
920 /*
921 * Ensure a dentry lease will no longer revalidate.
922 */
923 void ceph_invalidate_dentry_lease(struct dentry *dentry)
924 {
925 spin_lock(&dentry->d_lock);
926 dentry->d_time = jiffies;
927 ceph_dentry(dentry)->lease_shared_gen = 0;
928 spin_unlock(&dentry->d_lock);
929 }
930
931 /*
932 * Check if dentry lease is valid. If not, delete the lease. Try to
933 * renew if the least is more than half up.
934 */
935 static int dentry_lease_is_valid(struct dentry *dentry)
936 {
937 struct ceph_dentry_info *di;
938 struct ceph_mds_session *s;
939 int valid = 0;
940 u32 gen;
941 unsigned long ttl;
942 struct ceph_mds_session *session = NULL;
943 struct inode *dir = NULL;
944 u32 seq = 0;
945
946 spin_lock(&dentry->d_lock);
947 di = ceph_dentry(dentry);
948 if (di && di->lease_session) {
949 s = di->lease_session;
950 spin_lock(&s->s_cap_lock);
951 gen = s->s_cap_gen;
952 ttl = s->s_cap_ttl;
953 spin_unlock(&s->s_cap_lock);
954
955 if (di->lease_gen == gen &&
956 time_before(jiffies, dentry->d_time) &&
957 time_before(jiffies, ttl)) {
958 valid = 1;
959 if (di->lease_renew_after &&
960 time_after(jiffies, di->lease_renew_after)) {
961 /* we should renew */
962 dir = dentry->d_parent->d_inode;
963 session = ceph_get_mds_session(s);
964 seq = di->lease_seq;
965 di->lease_renew_after = 0;
966 di->lease_renew_from = jiffies;
967 }
968 }
969 }
970 spin_unlock(&dentry->d_lock);
971
972 if (session) {
973 ceph_mdsc_lease_send_msg(session, dir, dentry,
974 CEPH_MDS_LEASE_RENEW, seq);
975 ceph_put_mds_session(session);
976 }
977 dout("dentry_lease_is_valid - dentry %p = %d\n", dentry, valid);
978 return valid;
979 }
980
981 /*
982 * Check if directory-wide content lease/cap is valid.
983 */
984 static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry)
985 {
986 struct ceph_inode_info *ci = ceph_inode(dir);
987 struct ceph_dentry_info *di = ceph_dentry(dentry);
988 int valid = 0;
989
990 spin_lock(&dir->i_lock);
991 if (ci->i_shared_gen == di->lease_shared_gen)
992 valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1);
993 spin_unlock(&dir->i_lock);
994 dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n",
995 dir, (unsigned)ci->i_shared_gen, dentry,
996 (unsigned)di->lease_shared_gen, valid);
997 return valid;
998 }
999
1000 /*
1001 * Check if cached dentry can be trusted.
1002 */
1003 static int ceph_d_revalidate(struct dentry *dentry, struct nameidata *nd)
1004 {
1005 struct inode *dir;
1006
1007 if (nd && nd->flags & LOOKUP_RCU)
1008 return -ECHILD;
1009
1010 dir = dentry->d_parent->d_inode;
1011
1012 dout("d_revalidate %p '%.*s' inode %p offset %lld\n", dentry,
1013 dentry->d_name.len, dentry->d_name.name, dentry->d_inode,
1014 ceph_dentry(dentry)->offset);
1015
1016 /* always trust cached snapped dentries, snapdir dentry */
1017 if (ceph_snap(dir) != CEPH_NOSNAP) {
1018 dout("d_revalidate %p '%.*s' inode %p is SNAPPED\n", dentry,
1019 dentry->d_name.len, dentry->d_name.name, dentry->d_inode);
1020 goto out_touch;
1021 }
1022 if (dentry->d_inode && ceph_snap(dentry->d_inode) == CEPH_SNAPDIR)
1023 goto out_touch;
1024
1025 if (dentry_lease_is_valid(dentry) ||
1026 dir_lease_is_valid(dir, dentry))
1027 goto out_touch;
1028
1029 dout("d_revalidate %p invalid\n", dentry);
1030 d_drop(dentry);
1031 return 0;
1032 out_touch:
1033 ceph_dentry_lru_touch(dentry);
1034 return 1;
1035 }
1036
1037 /*
1038 * Release our ceph_dentry_info.
1039 */
1040 static void ceph_d_release(struct dentry *dentry)
1041 {
1042 struct ceph_dentry_info *di = ceph_dentry(dentry);
1043
1044 dout("d_release %p\n", dentry);
1045 if (di) {
1046 ceph_dentry_lru_del(dentry);
1047 if (di->lease_session)
1048 ceph_put_mds_session(di->lease_session);
1049 kmem_cache_free(ceph_dentry_cachep, di);
1050 dentry->d_fsdata = NULL;
1051 }
1052 }
1053
1054 static int ceph_snapdir_d_revalidate(struct dentry *dentry,
1055 struct nameidata *nd)
1056 {
1057 /*
1058 * Eventually, we'll want to revalidate snapped metadata
1059 * too... probably...
1060 */
1061 return 1;
1062 }
1063
1064
1065
1066 /*
1067 * read() on a dir. This weird interface hack only works if mounted
1068 * with '-o dirstat'.
1069 */
1070 static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
1071 loff_t *ppos)
1072 {
1073 struct ceph_file_info *cf = file->private_data;
1074 struct inode *inode = file->f_dentry->d_inode;
1075 struct ceph_inode_info *ci = ceph_inode(inode);
1076 int left;
1077 const int bufsize = 1024;
1078
1079 if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT))
1080 return -EISDIR;
1081
1082 if (!cf->dir_info) {
1083 cf->dir_info = kmalloc(bufsize, GFP_NOFS);
1084 if (!cf->dir_info)
1085 return -ENOMEM;
1086 cf->dir_info_len =
1087 snprintf(cf->dir_info, bufsize,
1088 "entries: %20lld\n"
1089 " files: %20lld\n"
1090 " subdirs: %20lld\n"
1091 "rentries: %20lld\n"
1092 " rfiles: %20lld\n"
1093 " rsubdirs: %20lld\n"
1094 "rbytes: %20lld\n"
1095 "rctime: %10ld.%09ld\n",
1096 ci->i_files + ci->i_subdirs,
1097 ci->i_files,
1098 ci->i_subdirs,
1099 ci->i_rfiles + ci->i_rsubdirs,
1100 ci->i_rfiles,
1101 ci->i_rsubdirs,
1102 ci->i_rbytes,
1103 (long)ci->i_rctime.tv_sec,
1104 (long)ci->i_rctime.tv_nsec);
1105 }
1106
1107 if (*ppos >= cf->dir_info_len)
1108 return 0;
1109 size = min_t(unsigned, size, cf->dir_info_len-*ppos);
1110 left = copy_to_user(buf, cf->dir_info + *ppos, size);
1111 if (left == size)
1112 return -EFAULT;
1113 *ppos += (size - left);
1114 return size - left;
1115 }
1116
1117 /*
1118 * an fsync() on a dir will wait for any uncommitted directory
1119 * operations to commit.
1120 */
1121 static int ceph_dir_fsync(struct file *file, loff_t start, loff_t end,
1122 int datasync)
1123 {
1124 struct inode *inode = file->f_path.dentry->d_inode;
1125 struct ceph_inode_info *ci = ceph_inode(inode);
1126 struct list_head *head = &ci->i_unsafe_dirops;
1127 struct ceph_mds_request *req;
1128 u64 last_tid;
1129 int ret = 0;
1130
1131 dout("dir_fsync %p\n", inode);
1132 ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
1133 if (ret)
1134 return ret;
1135 mutex_lock(&inode->i_mutex);
1136
1137 spin_lock(&ci->i_unsafe_lock);
1138 if (list_empty(head))
1139 goto out;
1140
1141 req = list_entry(head->prev,
1142 struct ceph_mds_request, r_unsafe_dir_item);
1143 last_tid = req->r_tid;
1144
1145 do {
1146 ceph_mdsc_get_request(req);
1147 spin_unlock(&ci->i_unsafe_lock);
1148 dout("dir_fsync %p wait on tid %llu (until %llu)\n",
1149 inode, req->r_tid, last_tid);
1150 if (req->r_timeout) {
1151 ret = wait_for_completion_timeout(
1152 &req->r_safe_completion, req->r_timeout);
1153 if (ret > 0)
1154 ret = 0;
1155 else if (ret == 0)
1156 ret = -EIO; /* timed out */
1157 } else {
1158 wait_for_completion(&req->r_safe_completion);
1159 }
1160 spin_lock(&ci->i_unsafe_lock);
1161 ceph_mdsc_put_request(req);
1162
1163 if (ret || list_empty(head))
1164 break;
1165 req = list_entry(head->next,
1166 struct ceph_mds_request, r_unsafe_dir_item);
1167 } while (req->r_tid < last_tid);
1168 out:
1169 spin_unlock(&ci->i_unsafe_lock);
1170 mutex_unlock(&inode->i_mutex);
1171
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_d_release,
1279 };
1280
1281 const struct dentry_operations ceph_snapdir_dentry_ops = {
1282 .d_revalidate = ceph_snapdir_d_revalidate,
1283 .d_release = ceph_d_release,
1284 };
1285
1286 const struct dentry_operations ceph_snap_dentry_ops = {
1287 .d_release = ceph_d_release,
1288 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree