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 = filp->f_dentry->d_parent->d_inode->i_ino; 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 switch (origin) { 450 case SEEK_END: 451 offset += inode->i_size + 2; /* FIXME */ 452 break; 453 case SEEK_CUR: 454 offset += file->f_pos; 455 } 456 retval = -EINVAL; 457 if (offset >= 0 && offset <= inode->i_sb->s_maxbytes) { 458 if (offset != file->f_pos) { 459 file->f_pos = offset; 460 file->f_version = 0; 461 fi->at_end = 0; 462 } 463 retval = offset; 464 465 /* 466 * discard buffered readdir content on seekdir(0), or 467 * seek to new frag, or seek prior to current chunk. 468 */ 469 if (offset == 0 || 470 fpos_frag(offset) != fpos_frag(old_offset) || 471 fpos_off(offset) < fi->offset) { 472 dout("dir_llseek dropping %p content\n", file); 473 reset_readdir(fi); 474 } 475 476 /* bump dir_release_count if we did a forward seek */ 477 if (offset > old_offset) 478 fi->dir_release_count--; 479 } 480 mutex_unlock(&inode->i_mutex); 481 return retval; 482 } 483 484 /* 485 * Process result of a lookup/open request. 486 * 487 * Mainly, make sure we return the final req->r_dentry (if it already 488 * existed) in place of the original VFS-provided dentry when they 489 * differ. 490 * 491 * Gracefully handle the case where the MDS replies with -ENOENT and 492 * no trace (which it may do, at its discretion, e.g., if it doesn't 493 * care to issue a lease on the negative dentry). 494 */ 495 struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 496 struct dentry *dentry, int err) 497 { 498 struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); 499 struct inode *parent = dentry->d_parent->d_inode; 500 501 /* .snap dir? */ 502 if (err == -ENOENT && 503 ceph_snap(parent) == CEPH_NOSNAP && 504 strcmp(dentry->d_name.name, 505 fsc->mount_options->snapdir_name) == 0) { 506 struct inode *inode = ceph_get_snapdir(parent); 507 dout("ENOENT on snapdir %p '%.*s', linking to snapdir %p\n", 508 dentry, dentry->d_name.len, dentry->d_name.name, inode); 509 BUG_ON(!d_unhashed(dentry)); 510 d_add(dentry, inode); 511 err = 0; 512 } 513 514 if (err == -ENOENT) { 515 /* no trace? */ 516 err = 0; 517 if (!req->r_reply_info.head->is_dentry) { 518 dout("ENOENT and no trace, dentry %p inode %p\n", 519 dentry, dentry->d_inode); 520 if (dentry->d_inode) { 521 d_drop(dentry); 522 err = -ENOENT; 523 } else { 524 d_add(dentry, NULL); 525 } 526 } 527 } 528 if (err) 529 dentry = ERR_PTR(err); 530 else if (dentry != req->r_dentry) 531 dentry = dget(req->r_dentry); /* we got spliced */ 532 else 533 dentry = NULL; 534 return dentry; 535 } 536 537 static int is_root_ceph_dentry(struct inode *inode, struct dentry *dentry) 538 { 539 return ceph_ino(inode) == CEPH_INO_ROOT && 540 strncmp(dentry->d_name.name, ".ceph", 5) == 0; 541 } 542 543 /* 544 * Look up a single dir entry. If there is a lookup intent, inform 545 * the MDS so that it gets our 'caps wanted' value in a single op. 546 */ 547 static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry, 548 struct nameidata *nd) 549 { 550 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); 551 struct ceph_mds_client *mdsc = fsc->mdsc; 552 struct ceph_mds_request *req; 553 int op; 554 int err; 555 556 dout("lookup %p dentry %p '%.*s'\n", 557 dir, dentry, dentry->d_name.len, dentry->d_name.name); 558 559 if (dentry->d_name.len > NAME_MAX) 560 return ERR_PTR(-ENAMETOOLONG); 561 562 err = ceph_init_dentry(dentry); 563 if (err < 0) 564 return ERR_PTR(err); 565 566 /* open (but not create!) intent? */ 567 if (nd && 568 (nd->flags & LOOKUP_OPEN) && 569 !(nd->intent.open.flags & O_CREAT)) { 570 int mode = nd->intent.open.create_mode & ~current->fs->umask; 571 return ceph_lookup_open(dir, dentry, nd, mode, 1); 572 } 573 574 /* can we conclude ENOENT locally? */ 575 if (dentry->d_inode == NULL) { 576 struct ceph_inode_info *ci = ceph_inode(dir); 577 struct ceph_dentry_info *di = ceph_dentry(dentry); 578 579 spin_lock(&dir->i_lock); 580 dout(" dir %p flags are %d\n", dir, ci->i_ceph_flags); 581 if (strncmp(dentry->d_name.name, 582 fsc->mount_options->snapdir_name, 583 dentry->d_name.len) && 584 !is_root_ceph_dentry(dir, dentry) && 585 (ci->i_ceph_flags & CEPH_I_COMPLETE) && 586 (__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) { 587 spin_unlock(&dir->i_lock); 588 dout(" dir %p complete, -ENOENT\n", dir); 589 d_add(dentry, NULL); 590 di->lease_shared_gen = ci->i_shared_gen; 591 return NULL; 592 } 593 spin_unlock(&dir->i_lock); 594 } 595 596 op = ceph_snap(dir) == CEPH_SNAPDIR ? 597 CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; 598 req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); 599 if (IS_ERR(req)) 600 return ERR_CAST(req); 601 req->r_dentry = dget(dentry); 602 req->r_num_caps = 2; 603 /* we only need inode linkage */ 604 req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); 605 req->r_locked_dir = dir; 606 err = ceph_mdsc_do_request(mdsc, NULL, req); 607 dentry = ceph_finish_lookup(req, dentry, err); 608 ceph_mdsc_put_request(req); /* will dput(dentry) */ 609 dout("lookup result=%p\n", dentry); 610 return dentry; 611 } 612 613 /* 614 * If we do a create but get no trace back from the MDS, follow up with 615 * a lookup (the VFS expects us to link up the provided dentry). 616 */ 617 int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry) 618 { 619 struct dentry *result = ceph_lookup(dir, dentry, NULL); 620 621 if (result && !IS_ERR(result)) { 622 /* 623 * We created the item, then did a lookup, and found 624 * it was already linked to another inode we already 625 * had in our cache (and thus got spliced). Link our 626 * dentry to that inode, but don't hash it, just in 627 * case the VFS wants to dereference it. 628 */ 629 BUG_ON(!result->d_inode); 630 d_instantiate(dentry, result->d_inode); 631 return 0; 632 } 633 return PTR_ERR(result); 634 } 635 636 static int ceph_mknod(struct inode *dir, struct dentry *dentry, 637 int mode, dev_t rdev) 638 { 639 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); 640 struct ceph_mds_client *mdsc = fsc->mdsc; 641 struct ceph_mds_request *req; 642 int err; 643 644 if (ceph_snap(dir) != CEPH_NOSNAP) 645 return -EROFS; 646 647 dout("mknod in dir %p dentry %p mode 0%o rdev %d\n", 648 dir, dentry, mode, rdev); 649 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS); 650 if (IS_ERR(req)) { 651 d_drop(dentry); 652 return PTR_ERR(req); 653 } 654 req->r_dentry = dget(dentry); 655 req->r_num_caps = 2; 656 req->r_locked_dir = dir; 657 req->r_args.mknod.mode = cpu_to_le32(mode); 658 req->r_args.mknod.rdev = cpu_to_le32(rdev); 659 req->r_dentry_drop = CEPH_CAP_FILE_SHARED; 660 req->r_dentry_unless = CEPH_CAP_FILE_EXCL; 661 err = ceph_mdsc_do_request(mdsc, dir, req); 662 if (!err && !req->r_reply_info.head->is_dentry) 663 err = ceph_handle_notrace_create(dir, dentry); 664 ceph_mdsc_put_request(req); 665 if (err) 666 d_drop(dentry); 667 return err; 668 } 669 670 static int ceph_create(struct inode *dir, struct dentry *dentry, int mode, 671 struct nameidata *nd) 672 { 673 dout("create in dir %p dentry %p name '%.*s'\n", 674 dir, dentry, dentry->d_name.len, dentry->d_name.name); 675 676 if (ceph_snap(dir) != CEPH_NOSNAP) 677 return -EROFS; 678 679 if (nd) { 680 BUG_ON((nd->flags & LOOKUP_OPEN) == 0); 681 dentry = ceph_lookup_open(dir, dentry, nd, mode, 0); 682 /* hrm, what should i do here if we get aliased? */ 683 if (IS_ERR(dentry)) 684 return PTR_ERR(dentry); 685 return 0; 686 } 687 688 /* fall back to mknod */ 689 return ceph_mknod(dir, dentry, (mode & ~S_IFMT) | S_IFREG, 0); 690 } 691 692 static int ceph_symlink(struct inode *dir, struct dentry *dentry, 693 const char *dest) 694 { 695 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); 696 struct ceph_mds_client *mdsc = fsc->mdsc; 697 struct ceph_mds_request *req; 698 int err; 699 700 if (ceph_snap(dir) != CEPH_NOSNAP) 701 return -EROFS; 702 703 dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest); 704 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS); 705 if (IS_ERR(req)) { 706 d_drop(dentry); 707 return PTR_ERR(req); 708 } 709 req->r_dentry = dget(dentry); 710 req->r_num_caps = 2; 711 req->r_path2 = kstrdup(dest, GFP_NOFS); 712 req->r_locked_dir = dir; 713 req->r_dentry_drop = CEPH_CAP_FILE_SHARED; 714 req->r_dentry_unless = CEPH_CAP_FILE_EXCL; 715 err = ceph_mdsc_do_request(mdsc, dir, req); 716 if (!err && !req->r_reply_info.head->is_dentry) 717 err = ceph_handle_notrace_create(dir, dentry); 718 ceph_mdsc_put_request(req); 719 if (err) 720 d_drop(dentry); 721 return err; 722 } 723 724 static int ceph_mkdir(struct inode *dir, struct dentry *dentry, int mode) 725 { 726 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); 727 struct ceph_mds_client *mdsc = fsc->mdsc; 728 struct ceph_mds_request *req; 729 int err = -EROFS; 730 int op; 731 732 if (ceph_snap(dir) == CEPH_SNAPDIR) { 733 /* mkdir .snap/foo is a MKSNAP */ 734 op = CEPH_MDS_OP_MKSNAP; 735 dout("mksnap dir %p snap '%.*s' dn %p\n", dir, 736 dentry->d_name.len, dentry->d_name.name, dentry); 737 } else if (ceph_snap(dir) == CEPH_NOSNAP) { 738 dout("mkdir dir %p dn %p mode 0%o\n", dir, dentry, mode); 739 op = CEPH_MDS_OP_MKDIR; 740 } else { 741 goto out; 742 } 743 req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); 744 if (IS_ERR(req)) { 745 err = PTR_ERR(req); 746 goto out; 747 } 748 749 req->r_dentry = dget(dentry); 750 req->r_num_caps = 2; 751 req->r_locked_dir = dir; 752 req->r_args.mkdir.mode = cpu_to_le32(mode); 753 req->r_dentry_drop = CEPH_CAP_FILE_SHARED; 754 req->r_dentry_unless = CEPH_CAP_FILE_EXCL; 755 err = ceph_mdsc_do_request(mdsc, dir, req); 756 if (!err && !req->r_reply_info.head->is_dentry) 757 err = ceph_handle_notrace_create(dir, dentry); 758 ceph_mdsc_put_request(req); 759 out: 760 if (err < 0) 761 d_drop(dentry); 762 return err; 763 } 764 765 static int ceph_link(struct dentry *old_dentry, struct inode *dir, 766 struct dentry *dentry) 767 { 768 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); 769 struct ceph_mds_client *mdsc = fsc->mdsc; 770 struct ceph_mds_request *req; 771 int err; 772 773 if (ceph_snap(dir) != CEPH_NOSNAP) 774 return -EROFS; 775 776 dout("link in dir %p old_dentry %p dentry %p\n", dir, 777 old_dentry, dentry); 778 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS); 779 if (IS_ERR(req)) { 780 d_drop(dentry); 781 return PTR_ERR(req); 782 } 783 req->r_dentry = dget(dentry); 784 req->r_num_caps = 2; 785 req->r_old_dentry = dget(old_dentry); /* or inode? hrm. */ 786 req->r_locked_dir = dir; 787 req->r_dentry_drop = CEPH_CAP_FILE_SHARED; 788 req->r_dentry_unless = CEPH_CAP_FILE_EXCL; 789 err = ceph_mdsc_do_request(mdsc, dir, req); 790 if (err) { 791 d_drop(dentry); 792 } else if (!req->r_reply_info.head->is_dentry) { 793 ihold(old_dentry->d_inode); 794 d_instantiate(dentry, old_dentry->d_inode); 795 } 796 ceph_mdsc_put_request(req); 797 return err; 798 } 799 800 /* 801 * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it 802 * looks like the link count will hit 0, drop any other caps (other 803 * than PIN) we don't specifically want (due to the file still being 804 * open). 805 */ 806 static int drop_caps_for_unlink(struct inode *inode) 807 { 808 struct ceph_inode_info *ci = ceph_inode(inode); 809 int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL; 810 811 spin_lock(&inode->i_lock); 812 if (inode->i_nlink == 1) { 813 drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN); 814 ci->i_ceph_flags |= CEPH_I_NODELAY; 815 } 816 spin_unlock(&inode->i_lock); 817 return drop; 818 } 819 820 /* 821 * rmdir and unlink are differ only by the metadata op code 822 */ 823 static int ceph_unlink(struct inode *dir, struct dentry *dentry) 824 { 825 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); 826 struct ceph_mds_client *mdsc = fsc->mdsc; 827 struct inode *inode = dentry->d_inode; 828 struct ceph_mds_request *req; 829 int err = -EROFS; 830 int op; 831 832 if (ceph_snap(dir) == CEPH_SNAPDIR) { 833 /* rmdir .snap/foo is RMSNAP */ 834 dout("rmsnap dir %p '%.*s' dn %p\n", dir, dentry->d_name.len, 835 dentry->d_name.name, dentry); 836 op = CEPH_MDS_OP_RMSNAP; 837 } else if (ceph_snap(dir) == CEPH_NOSNAP) { 838 dout("unlink/rmdir dir %p dn %p inode %p\n", 839 dir, dentry, inode); 840 op = ((dentry->d_inode->i_mode & S_IFMT) == S_IFDIR) ? 841 CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK; 842 } else 843 goto out; 844 req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); 845 if (IS_ERR(req)) { 846 err = PTR_ERR(req); 847 goto out; 848 } 849 req->r_dentry = dget(dentry); 850 req->r_num_caps = 2; 851 req->r_locked_dir = dir; 852 req->r_dentry_drop = CEPH_CAP_FILE_SHARED; 853 req->r_dentry_unless = CEPH_CAP_FILE_EXCL; 854 req->r_inode_drop = drop_caps_for_unlink(inode); 855 err = ceph_mdsc_do_request(mdsc, dir, req); 856 if (!err && !req->r_reply_info.head->is_dentry) 857 d_delete(dentry); 858 ceph_mdsc_put_request(req); 859 out: 860 return err; 861 } 862 863 static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry, 864 struct inode *new_dir, struct dentry *new_dentry) 865 { 866 struct ceph_fs_client *fsc = ceph_sb_to_client(old_dir->i_sb); 867 struct ceph_mds_client *mdsc = fsc->mdsc; 868 struct ceph_mds_request *req; 869 int err; 870 871 if (ceph_snap(old_dir) != ceph_snap(new_dir)) 872 return -EXDEV; 873 if (ceph_snap(old_dir) != CEPH_NOSNAP || 874 ceph_snap(new_dir) != CEPH_NOSNAP) 875 return -EROFS; 876 dout("rename dir %p dentry %p to dir %p dentry %p\n", 877 old_dir, old_dentry, new_dir, new_dentry); 878 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RENAME, USE_AUTH_MDS); 879 if (IS_ERR(req)) 880 return PTR_ERR(req); 881 req->r_dentry = dget(new_dentry); 882 req->r_num_caps = 2; 883 req->r_old_dentry = dget(old_dentry); 884 req->r_locked_dir = new_dir; 885 req->r_old_dentry_drop = CEPH_CAP_FILE_SHARED; 886 req->r_old_dentry_unless = CEPH_CAP_FILE_EXCL; 887 req->r_dentry_drop = CEPH_CAP_FILE_SHARED; 888 req->r_dentry_unless = CEPH_CAP_FILE_EXCL; 889 /* release LINK_RDCACHE on source inode (mds will lock it) */ 890 req->r_old_inode_drop = CEPH_CAP_LINK_SHARED; 891 if (new_dentry->d_inode) 892 req->r_inode_drop = drop_caps_for_unlink(new_dentry->d_inode); 893 err = ceph_mdsc_do_request(mdsc, old_dir, req); 894 if (!err && !req->r_reply_info.head->is_dentry) { 895 /* 896 * Normally d_move() is done by fill_trace (called by 897 * do_request, above). If there is no trace, we need 898 * to do it here. 899 */ 900 901 /* d_move screws up d_subdirs order */ 902 ceph_i_clear(new_dir, CEPH_I_COMPLETE); 903 904 d_move(old_dentry, new_dentry); 905 906 /* ensure target dentry is invalidated, despite 907 rehashing bug in vfs_rename_dir */ 908 ceph_invalidate_dentry_lease(new_dentry); 909 } 910 ceph_mdsc_put_request(req); 911 return err; 912 } 913 914 /* 915 * Ensure a dentry lease will no longer revalidate. 916 */ 917 void ceph_invalidate_dentry_lease(struct dentry *dentry) 918 { 919 spin_lock(&dentry->d_lock); 920 dentry->d_time = jiffies; 921 ceph_dentry(dentry)->lease_shared_gen = 0; 922 spin_unlock(&dentry->d_lock); 923 } 924 925 /* 926 * Check if dentry lease is valid. If not, delete the lease. Try to 927 * renew if the least is more than half up. 928 */ 929 static int dentry_lease_is_valid(struct dentry *dentry) 930 { 931 struct ceph_dentry_info *di; 932 struct ceph_mds_session *s; 933 int valid = 0; 934 u32 gen; 935 unsigned long ttl; 936 struct ceph_mds_session *session = NULL; 937 struct inode *dir = NULL; 938 u32 seq = 0; 939 940 spin_lock(&dentry->d_lock); 941 di = ceph_dentry(dentry); 942 if (di && di->lease_session) { 943 s = di->lease_session; 944 spin_lock(&s->s_cap_lock); 945 gen = s->s_cap_gen; 946 ttl = s->s_cap_ttl; 947 spin_unlock(&s->s_cap_lock); 948 949 if (di->lease_gen == gen && 950 time_before(jiffies, dentry->d_time) && 951 time_before(jiffies, ttl)) { 952 valid = 1; 953 if (di->lease_renew_after && 954 time_after(jiffies, di->lease_renew_after)) { 955 /* we should renew */ 956 dir = dentry->d_parent->d_inode; 957 session = ceph_get_mds_session(s); 958 seq = di->lease_seq; 959 di->lease_renew_after = 0; 960 di->lease_renew_from = jiffies; 961 } 962 } 963 } 964 spin_unlock(&dentry->d_lock); 965 966 if (session) { 967 ceph_mdsc_lease_send_msg(session, dir, dentry, 968 CEPH_MDS_LEASE_RENEW, seq); 969 ceph_put_mds_session(session); 970 } 971 dout("dentry_lease_is_valid - dentry %p = %d\n", dentry, valid); 972 return valid; 973 } 974 975 /* 976 * Check if directory-wide content lease/cap is valid. 977 */ 978 static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry) 979 { 980 struct ceph_inode_info *ci = ceph_inode(dir); 981 struct ceph_dentry_info *di = ceph_dentry(dentry); 982 int valid = 0; 983 984 spin_lock(&dir->i_lock); 985 if (ci->i_shared_gen == di->lease_shared_gen) 986 valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1); 987 spin_unlock(&dir->i_lock); 988 dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n", 989 dir, (unsigned)ci->i_shared_gen, dentry, 990 (unsigned)di->lease_shared_gen, valid); 991 return valid; 992 } 993 994 /* 995 * Check if cached dentry can be trusted. 996 */ 997 static int ceph_d_revalidate(struct dentry *dentry, struct nameidata *nd) 998 { 999 struct inode *dir; 1000 1001 if (nd && nd->flags & LOOKUP_RCU) 1002 return -ECHILD; 1003 1004 dir = dentry->d_parent->d_inode; 1005 1006 dout("d_revalidate %p '%.*s' inode %p offset %lld\n", dentry, 1007 dentry->d_name.len, dentry->d_name.name, dentry->d_inode, 1008 ceph_dentry(dentry)->offset); 1009 1010 /* always trust cached snapped dentries, snapdir dentry */ 1011 if (ceph_snap(dir) != CEPH_NOSNAP) { 1012 dout("d_revalidate %p '%.*s' inode %p is SNAPPED\n", dentry, 1013 dentry->d_name.len, dentry->d_name.name, dentry->d_inode); 1014 goto out_touch; 1015 } 1016 if (dentry->d_inode && ceph_snap(dentry->d_inode) == CEPH_SNAPDIR) 1017 goto out_touch; 1018 1019 if (dentry_lease_is_valid(dentry) || 1020 dir_lease_is_valid(dir, dentry)) 1021 goto out_touch; 1022 1023 dout("d_revalidate %p invalid\n", dentry); 1024 d_drop(dentry); 1025 return 0; 1026 out_touch: 1027 ceph_dentry_lru_touch(dentry); 1028 return 1; 1029 } 1030 1031 /* 1032 * Release our ceph_dentry_info. 1033 */ 1034 static void ceph_d_release(struct dentry *dentry) 1035 { 1036 struct ceph_dentry_info *di = ceph_dentry(dentry); 1037 1038 dout("d_release %p\n", dentry); 1039 if (di) { 1040 ceph_dentry_lru_del(dentry); 1041 if (di->lease_session) 1042 ceph_put_mds_session(di->lease_session); 1043 kmem_cache_free(ceph_dentry_cachep, di); 1044 dentry->d_fsdata = NULL; 1045 } 1046 } 1047 1048 static int ceph_snapdir_d_revalidate(struct dentry *dentry, 1049 struct nameidata *nd) 1050 { 1051 /* 1052 * Eventually, we'll want to revalidate snapped metadata 1053 * too... probably... 1054 */ 1055 return 1; 1056 } 1057 1058 1059 1060 /* 1061 * read() on a dir. This weird interface hack only works if mounted 1062 * with '-o dirstat'. 1063 */ 1064 static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, 1065 loff_t *ppos) 1066 { 1067 struct ceph_file_info *cf = file->private_data; 1068 struct inode *inode = file->f_dentry->d_inode; 1069 struct ceph_inode_info *ci = ceph_inode(inode); 1070 int left; 1071 const int bufsize = 1024; 1072 1073 if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT)) 1074 return -EISDIR; 1075 1076 if (!cf->dir_info) { 1077 cf->dir_info = kmalloc(bufsize, GFP_NOFS); 1078 if (!cf->dir_info) 1079 return -ENOMEM; 1080 cf->dir_info_len = 1081 snprintf(cf->dir_info, bufsize, 1082 "entries: %20lld\n" 1083 " files: %20lld\n" 1084 " subdirs: %20lld\n" 1085 "rentries: %20lld\n" 1086 " rfiles: %20lld\n" 1087 " rsubdirs: %20lld\n" 1088 "rbytes: %20lld\n" 1089 "rctime: %10ld.%09ld\n", 1090 ci->i_files + ci->i_subdirs, 1091 ci->i_files, 1092 ci->i_subdirs, 1093 ci->i_rfiles + ci->i_rsubdirs, 1094 ci->i_rfiles, 1095 ci->i_rsubdirs, 1096 ci->i_rbytes, 1097 (long)ci->i_rctime.tv_sec, 1098 (long)ci->i_rctime.tv_nsec); 1099 } 1100 1101 if (*ppos >= cf->dir_info_len) 1102 return 0; 1103 size = min_t(unsigned, size, cf->dir_info_len-*ppos); 1104 left = copy_to_user(buf, cf->dir_info + *ppos, size); 1105 if (left == size) 1106 return -EFAULT; 1107 *ppos += (size - left); 1108 return size - left; 1109 } 1110 1111 /* 1112 * an fsync() on a dir will wait for any uncommitted directory 1113 * operations to commit. 1114 */ 1115 static int ceph_dir_fsync(struct file *file, int datasync) 1116 { 1117 struct inode *inode = file->f_path.dentry->d_inode; 1118 struct ceph_inode_info *ci = ceph_inode(inode); 1119 struct list_head *head = &ci->i_unsafe_dirops; 1120 struct ceph_mds_request *req; 1121 u64 last_tid; 1122 int ret = 0; 1123 1124 dout("dir_fsync %p\n", inode); 1125 spin_lock(&ci->i_unsafe_lock); 1126 if (list_empty(head)) 1127 goto out; 1128 1129 req = list_entry(head->prev, 1130 struct ceph_mds_request, r_unsafe_dir_item); 1131 last_tid = req->r_tid; 1132 1133 do { 1134 ceph_mdsc_get_request(req); 1135 spin_unlock(&ci->i_unsafe_lock); 1136 dout("dir_fsync %p wait on tid %llu (until %llu)\n", 1137 inode, req->r_tid, last_tid); 1138 if (req->r_timeout) { 1139 ret = wait_for_completion_timeout( 1140 &req->r_safe_completion, req->r_timeout); 1141 if (ret > 0) 1142 ret = 0; 1143 else if (ret == 0) 1144 ret = -EIO; /* timed out */ 1145 } else { 1146 wait_for_completion(&req->r_safe_completion); 1147 } 1148 spin_lock(&ci->i_unsafe_lock); 1149 ceph_mdsc_put_request(req); 1150 1151 if (ret || list_empty(head)) 1152 break; 1153 req = list_entry(head->next, 1154 struct ceph_mds_request, r_unsafe_dir_item); 1155 } while (req->r_tid < last_tid); 1156 out: 1157 spin_unlock(&ci->i_unsafe_lock); 1158 return ret; 1159 } 1160 1161 /* 1162 * We maintain a private dentry LRU. 1163 * 1164 * FIXME: this needs to be changed to a per-mds lru to be useful. 1165 */ 1166 void ceph_dentry_lru_add(struct dentry *dn) 1167 { 1168 struct ceph_dentry_info *di = ceph_dentry(dn); 1169 struct ceph_mds_client *mdsc; 1170 1171 dout("dentry_lru_add %p %p '%.*s'\n", di, dn, 1172 dn->d_name.len, dn->d_name.name); 1173 if (di) { 1174 mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; 1175 spin_lock(&mdsc->dentry_lru_lock); 1176 list_add_tail(&di->lru, &mdsc->dentry_lru); 1177 mdsc->num_dentry++; 1178 spin_unlock(&mdsc->dentry_lru_lock); 1179 } 1180 } 1181 1182 void ceph_dentry_lru_touch(struct dentry *dn) 1183 { 1184 struct ceph_dentry_info *di = ceph_dentry(dn); 1185 struct ceph_mds_client *mdsc; 1186 1187 dout("dentry_lru_touch %p %p '%.*s' (offset %lld)\n", di, dn, 1188 dn->d_name.len, dn->d_name.name, di->offset); 1189 if (di) { 1190 mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; 1191 spin_lock(&mdsc->dentry_lru_lock); 1192 list_move_tail(&di->lru, &mdsc->dentry_lru); 1193 spin_unlock(&mdsc->dentry_lru_lock); 1194 } 1195 } 1196 1197 void ceph_dentry_lru_del(struct dentry *dn) 1198 { 1199 struct ceph_dentry_info *di = ceph_dentry(dn); 1200 struct ceph_mds_client *mdsc; 1201 1202 dout("dentry_lru_del %p %p '%.*s'\n", di, dn, 1203 dn->d_name.len, dn->d_name.name); 1204 if (di) { 1205 mdsc = ceph_sb_to_client(dn->d_sb)->mdsc; 1206 spin_lock(&mdsc->dentry_lru_lock); 1207 list_del_init(&di->lru); 1208 mdsc->num_dentry--; 1209 spin_unlock(&mdsc->dentry_lru_lock); 1210 } 1211 } 1212 1213 /* 1214 * Return name hash for a given dentry. This is dependent on 1215 * the parent directory's hash function. 1216 */ 1217 unsigned ceph_dentry_hash(struct dentry *dn) 1218 { 1219 struct inode *dir = dn->d_parent->d_inode; 1220 struct ceph_inode_info *dci = ceph_inode(dir); 1221 1222 switch (dci->i_dir_layout.dl_dir_hash) { 1223 case 0: /* for backward compat */ 1224 case CEPH_STR_HASH_LINUX: 1225 return dn->d_name.hash; 1226 1227 default: 1228 return ceph_str_hash(dci->i_dir_layout.dl_dir_hash, 1229 dn->d_name.name, dn->d_name.len); 1230 } 1231 } 1232 1233 const struct file_operations ceph_dir_fops = { 1234 .read = ceph_read_dir, 1235 .readdir = ceph_readdir, 1236 .llseek = ceph_dir_llseek, 1237 .open = ceph_open, 1238 .release = ceph_release, 1239 .unlocked_ioctl = ceph_ioctl, 1240 .fsync = ceph_dir_fsync, 1241 }; 1242 1243 const struct inode_operations ceph_dir_iops = { 1244 .lookup = ceph_lookup, 1245 .permission = ceph_permission, 1246 .getattr = ceph_getattr, 1247 .setattr = ceph_setattr, 1248 .setxattr = ceph_setxattr, 1249 .getxattr = ceph_getxattr, 1250 .listxattr = ceph_listxattr, 1251 .removexattr = ceph_removexattr, 1252 .mknod = ceph_mknod, 1253 .symlink = ceph_symlink, 1254 .mkdir = ceph_mkdir, 1255 .link = ceph_link, 1256 .unlink = ceph_unlink, 1257 .rmdir = ceph_unlink, 1258 .rename = ceph_rename, 1259 .create = ceph_create, 1260 }; 1261 1262 const struct dentry_operations ceph_dentry_ops = { 1263 .d_revalidate = ceph_d_revalidate, 1264 .d_release = ceph_d_release, 1265 }; 1266 1267 const struct dentry_operations ceph_snapdir_dentry_ops = { 1268 .d_revalidate = ceph_snapdir_d_revalidate, 1269 .d_release = ceph_d_release, 1270 }; 1271 1272 const struct dentry_operations ceph_snap_dentry_ops = { 1273 .d_release = ceph_d_release, 1274 }; 1275