1 #include <linux/ceph/ceph_debug.h> 2 3 #include <linux/module.h> 4 #include <linux/fs.h> 5 #include <linux/slab.h> 6 #include <linux/string.h> 7 #include <linux/uaccess.h> 8 #include <linux/kernel.h> 9 #include <linux/namei.h> 10 #include <linux/writeback.h> 11 #include <linux/vmalloc.h> 12 13 #include "super.h" 14 #include "mds_client.h" 15 #include <linux/ceph/decode.h> 16 17 /* 18 * Ceph inode operations 19 * 20 * Implement basic inode helpers (get, alloc) and inode ops (getattr, 21 * setattr, etc.), xattr helpers, and helpers for assimilating 22 * metadata returned by the MDS into our cache. 23 * 24 * Also define helpers for doing asynchronous writeback, invalidation, 25 * and truncation for the benefit of those who can't afford to block 26 * (typically because they are in the message handler path). 27 */ 28 29 static const struct inode_operations ceph_symlink_iops; 30 31 static void ceph_invalidate_work(struct work_struct *work); 32 static void ceph_writeback_work(struct work_struct *work); 33 static void ceph_vmtruncate_work(struct work_struct *work); 34 35 /* 36 * find or create an inode, given the ceph ino number 37 */ 38 static int ceph_set_ino_cb(struct inode *inode, void *data) 39 { 40 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; 41 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); 42 return 0; 43 } 44 45 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) 46 { 47 struct inode *inode; 48 ino_t t = ceph_vino_to_ino(vino); 49 50 inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); 51 if (inode == NULL) 52 return ERR_PTR(-ENOMEM); 53 if (inode->i_state & I_NEW) { 54 dout("get_inode created new inode %p %llx.%llx ino %llx\n", 55 inode, ceph_vinop(inode), (u64)inode->i_ino); 56 unlock_new_inode(inode); 57 } 58 59 dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, 60 vino.snap, inode); 61 return inode; 62 } 63 64 struct inode *ceph_lookup_inode(struct super_block *sb, struct ceph_vino vino) 65 { 66 struct inode *inode; 67 ino_t t = ceph_vino_to_ino(vino); 68 inode = ilookup5_nowait(sb, t, ceph_ino_compare, &vino); 69 return inode; 70 } 71 72 /* 73 * get/constuct snapdir inode for a given directory 74 */ 75 struct inode *ceph_get_snapdir(struct inode *parent) 76 { 77 struct ceph_vino vino = { 78 .ino = ceph_ino(parent), 79 .snap = CEPH_SNAPDIR, 80 }; 81 struct inode *inode = ceph_get_inode(parent->i_sb, vino); 82 struct ceph_inode_info *ci = ceph_inode(inode); 83 84 BUG_ON(!S_ISDIR(parent->i_mode)); 85 if (IS_ERR(inode)) 86 return inode; 87 inode->i_mode = parent->i_mode; 88 inode->i_uid = parent->i_uid; 89 inode->i_gid = parent->i_gid; 90 inode->i_op = &ceph_dir_iops; 91 inode->i_fop = &ceph_dir_fops; 92 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ 93 ci->i_rbytes = 0; 94 return inode; 95 } 96 97 const struct inode_operations ceph_file_iops = { 98 .permission = ceph_permission, 99 .setattr = ceph_setattr, 100 .getattr = ceph_getattr, 101 .setxattr = ceph_setxattr, 102 .getxattr = ceph_getxattr, 103 .listxattr = ceph_listxattr, 104 .removexattr = ceph_removexattr, 105 }; 106 107 108 /* 109 * We use a 'frag tree' to keep track of the MDS's directory fragments 110 * for a given inode (usually there is just a single fragment). We 111 * need to know when a child frag is delegated to a new MDS, or when 112 * it is flagged as replicated, so we can direct our requests 113 * accordingly. 114 */ 115 116 /* 117 * find/create a frag in the tree 118 */ 119 static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, 120 u32 f) 121 { 122 struct rb_node **p; 123 struct rb_node *parent = NULL; 124 struct ceph_inode_frag *frag; 125 int c; 126 127 p = &ci->i_fragtree.rb_node; 128 while (*p) { 129 parent = *p; 130 frag = rb_entry(parent, struct ceph_inode_frag, node); 131 c = ceph_frag_compare(f, frag->frag); 132 if (c < 0) 133 p = &(*p)->rb_left; 134 else if (c > 0) 135 p = &(*p)->rb_right; 136 else 137 return frag; 138 } 139 140 frag = kmalloc(sizeof(*frag), GFP_NOFS); 141 if (!frag) { 142 pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " 143 "frag %x\n", &ci->vfs_inode, 144 ceph_vinop(&ci->vfs_inode), f); 145 return ERR_PTR(-ENOMEM); 146 } 147 frag->frag = f; 148 frag->split_by = 0; 149 frag->mds = -1; 150 frag->ndist = 0; 151 152 rb_link_node(&frag->node, parent, p); 153 rb_insert_color(&frag->node, &ci->i_fragtree); 154 155 dout("get_or_create_frag added %llx.%llx frag %x\n", 156 ceph_vinop(&ci->vfs_inode), f); 157 return frag; 158 } 159 160 /* 161 * find a specific frag @f 162 */ 163 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) 164 { 165 struct rb_node *n = ci->i_fragtree.rb_node; 166 167 while (n) { 168 struct ceph_inode_frag *frag = 169 rb_entry(n, struct ceph_inode_frag, node); 170 int c = ceph_frag_compare(f, frag->frag); 171 if (c < 0) 172 n = n->rb_left; 173 else if (c > 0) 174 n = n->rb_right; 175 else 176 return frag; 177 } 178 return NULL; 179 } 180 181 /* 182 * Choose frag containing the given value @v. If @pfrag is 183 * specified, copy the frag delegation info to the caller if 184 * it is present. 185 */ 186 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 187 struct ceph_inode_frag *pfrag, 188 int *found) 189 { 190 u32 t = ceph_frag_make(0, 0); 191 struct ceph_inode_frag *frag; 192 unsigned nway, i; 193 u32 n; 194 195 if (found) 196 *found = 0; 197 198 mutex_lock(&ci->i_fragtree_mutex); 199 while (1) { 200 WARN_ON(!ceph_frag_contains_value(t, v)); 201 frag = __ceph_find_frag(ci, t); 202 if (!frag) 203 break; /* t is a leaf */ 204 if (frag->split_by == 0) { 205 if (pfrag) 206 memcpy(pfrag, frag, sizeof(*pfrag)); 207 if (found) 208 *found = 1; 209 break; 210 } 211 212 /* choose child */ 213 nway = 1 << frag->split_by; 214 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, 215 frag->split_by, nway); 216 for (i = 0; i < nway; i++) { 217 n = ceph_frag_make_child(t, frag->split_by, i); 218 if (ceph_frag_contains_value(n, v)) { 219 t = n; 220 break; 221 } 222 } 223 BUG_ON(i == nway); 224 } 225 dout("choose_frag(%x) = %x\n", v, t); 226 227 mutex_unlock(&ci->i_fragtree_mutex); 228 return t; 229 } 230 231 /* 232 * Process dirfrag (delegation) info from the mds. Include leaf 233 * fragment in tree ONLY if ndist > 0. Otherwise, only 234 * branches/splits are included in i_fragtree) 235 */ 236 static int ceph_fill_dirfrag(struct inode *inode, 237 struct ceph_mds_reply_dirfrag *dirinfo) 238 { 239 struct ceph_inode_info *ci = ceph_inode(inode); 240 struct ceph_inode_frag *frag; 241 u32 id = le32_to_cpu(dirinfo->frag); 242 int mds = le32_to_cpu(dirinfo->auth); 243 int ndist = le32_to_cpu(dirinfo->ndist); 244 int i; 245 int err = 0; 246 247 mutex_lock(&ci->i_fragtree_mutex); 248 if (ndist == 0) { 249 /* no delegation info needed. */ 250 frag = __ceph_find_frag(ci, id); 251 if (!frag) 252 goto out; 253 if (frag->split_by == 0) { 254 /* tree leaf, remove */ 255 dout("fill_dirfrag removed %llx.%llx frag %x" 256 " (no ref)\n", ceph_vinop(inode), id); 257 rb_erase(&frag->node, &ci->i_fragtree); 258 kfree(frag); 259 } else { 260 /* tree branch, keep and clear */ 261 dout("fill_dirfrag cleared %llx.%llx frag %x" 262 " referral\n", ceph_vinop(inode), id); 263 frag->mds = -1; 264 frag->ndist = 0; 265 } 266 goto out; 267 } 268 269 270 /* find/add this frag to store mds delegation info */ 271 frag = __get_or_create_frag(ci, id); 272 if (IS_ERR(frag)) { 273 /* this is not the end of the world; we can continue 274 with bad/inaccurate delegation info */ 275 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", 276 ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); 277 err = -ENOMEM; 278 goto out; 279 } 280 281 frag->mds = mds; 282 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); 283 for (i = 0; i < frag->ndist; i++) 284 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); 285 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", 286 ceph_vinop(inode), frag->frag, frag->ndist); 287 288 out: 289 mutex_unlock(&ci->i_fragtree_mutex); 290 return err; 291 } 292 293 294 /* 295 * initialize a newly allocated inode. 296 */ 297 struct inode *ceph_alloc_inode(struct super_block *sb) 298 { 299 struct ceph_inode_info *ci; 300 int i; 301 302 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); 303 if (!ci) 304 return NULL; 305 306 dout("alloc_inode %p\n", &ci->vfs_inode); 307 308 spin_lock_init(&ci->i_ceph_lock); 309 310 ci->i_version = 0; 311 ci->i_time_warp_seq = 0; 312 ci->i_ceph_flags = 0; 313 atomic_set(&ci->i_release_count, 1); 314 atomic_set(&ci->i_complete_count, 0); 315 ci->i_symlink = NULL; 316 317 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); 318 319 ci->i_fragtree = RB_ROOT; 320 mutex_init(&ci->i_fragtree_mutex); 321 322 ci->i_xattrs.blob = NULL; 323 ci->i_xattrs.prealloc_blob = NULL; 324 ci->i_xattrs.dirty = false; 325 ci->i_xattrs.index = RB_ROOT; 326 ci->i_xattrs.count = 0; 327 ci->i_xattrs.names_size = 0; 328 ci->i_xattrs.vals_size = 0; 329 ci->i_xattrs.version = 0; 330 ci->i_xattrs.index_version = 0; 331 332 ci->i_caps = RB_ROOT; 333 ci->i_auth_cap = NULL; 334 ci->i_dirty_caps = 0; 335 ci->i_flushing_caps = 0; 336 INIT_LIST_HEAD(&ci->i_dirty_item); 337 INIT_LIST_HEAD(&ci->i_flushing_item); 338 ci->i_cap_flush_seq = 0; 339 ci->i_cap_flush_last_tid = 0; 340 memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid)); 341 init_waitqueue_head(&ci->i_cap_wq); 342 ci->i_hold_caps_min = 0; 343 ci->i_hold_caps_max = 0; 344 INIT_LIST_HEAD(&ci->i_cap_delay_list); 345 ci->i_cap_exporting_mds = 0; 346 ci->i_cap_exporting_mseq = 0; 347 ci->i_cap_exporting_issued = 0; 348 INIT_LIST_HEAD(&ci->i_cap_snaps); 349 ci->i_head_snapc = NULL; 350 ci->i_snap_caps = 0; 351 352 for (i = 0; i < CEPH_FILE_MODE_NUM; i++) 353 ci->i_nr_by_mode[i] = 0; 354 355 ci->i_truncate_seq = 0; 356 ci->i_truncate_size = 0; 357 ci->i_truncate_pending = 0; 358 359 ci->i_max_size = 0; 360 ci->i_reported_size = 0; 361 ci->i_wanted_max_size = 0; 362 ci->i_requested_max_size = 0; 363 364 ci->i_pin_ref = 0; 365 ci->i_rd_ref = 0; 366 ci->i_rdcache_ref = 0; 367 ci->i_wr_ref = 0; 368 ci->i_wb_ref = 0; 369 ci->i_wrbuffer_ref = 0; 370 ci->i_wrbuffer_ref_head = 0; 371 ci->i_shared_gen = 0; 372 ci->i_rdcache_gen = 0; 373 ci->i_rdcache_revoking = 0; 374 375 INIT_LIST_HEAD(&ci->i_unsafe_writes); 376 INIT_LIST_HEAD(&ci->i_unsafe_dirops); 377 spin_lock_init(&ci->i_unsafe_lock); 378 379 ci->i_snap_realm = NULL; 380 INIT_LIST_HEAD(&ci->i_snap_realm_item); 381 INIT_LIST_HEAD(&ci->i_snap_flush_item); 382 383 INIT_WORK(&ci->i_wb_work, ceph_writeback_work); 384 INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); 385 386 INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); 387 388 return &ci->vfs_inode; 389 } 390 391 static void ceph_i_callback(struct rcu_head *head) 392 { 393 struct inode *inode = container_of(head, struct inode, i_rcu); 394 struct ceph_inode_info *ci = ceph_inode(inode); 395 396 kmem_cache_free(ceph_inode_cachep, ci); 397 } 398 399 void ceph_destroy_inode(struct inode *inode) 400 { 401 struct ceph_inode_info *ci = ceph_inode(inode); 402 struct ceph_inode_frag *frag; 403 struct rb_node *n; 404 405 dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); 406 407 ceph_queue_caps_release(inode); 408 409 /* 410 * we may still have a snap_realm reference if there are stray 411 * caps in i_cap_exporting_issued or i_snap_caps. 412 */ 413 if (ci->i_snap_realm) { 414 struct ceph_mds_client *mdsc = 415 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; 416 struct ceph_snap_realm *realm = ci->i_snap_realm; 417 418 dout(" dropping residual ref to snap realm %p\n", realm); 419 spin_lock(&realm->inodes_with_caps_lock); 420 list_del_init(&ci->i_snap_realm_item); 421 spin_unlock(&realm->inodes_with_caps_lock); 422 ceph_put_snap_realm(mdsc, realm); 423 } 424 425 kfree(ci->i_symlink); 426 while ((n = rb_first(&ci->i_fragtree)) != NULL) { 427 frag = rb_entry(n, struct ceph_inode_frag, node); 428 rb_erase(n, &ci->i_fragtree); 429 kfree(frag); 430 } 431 432 __ceph_destroy_xattrs(ci); 433 if (ci->i_xattrs.blob) 434 ceph_buffer_put(ci->i_xattrs.blob); 435 if (ci->i_xattrs.prealloc_blob) 436 ceph_buffer_put(ci->i_xattrs.prealloc_blob); 437 438 call_rcu(&inode->i_rcu, ceph_i_callback); 439 } 440 441 442 /* 443 * Helpers to fill in size, ctime, mtime, and atime. We have to be 444 * careful because either the client or MDS may have more up to date 445 * info, depending on which capabilities are held, and whether 446 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime 447 * and size are monotonically increasing, except when utimes() or 448 * truncate() increments the corresponding _seq values.) 449 */ 450 int ceph_fill_file_size(struct inode *inode, int issued, 451 u32 truncate_seq, u64 truncate_size, u64 size) 452 { 453 struct ceph_inode_info *ci = ceph_inode(inode); 454 int queue_trunc = 0; 455 456 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || 457 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { 458 dout("size %lld -> %llu\n", inode->i_size, size); 459 inode->i_size = size; 460 inode->i_blocks = (size + (1<<9) - 1) >> 9; 461 ci->i_reported_size = size; 462 if (truncate_seq != ci->i_truncate_seq) { 463 dout("truncate_seq %u -> %u\n", 464 ci->i_truncate_seq, truncate_seq); 465 ci->i_truncate_seq = truncate_seq; 466 /* 467 * If we hold relevant caps, or in the case where we're 468 * not the only client referencing this file and we 469 * don't hold those caps, then we need to check whether 470 * the file is either opened or mmaped 471 */ 472 if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD| 473 CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER| 474 CEPH_CAP_FILE_EXCL| 475 CEPH_CAP_FILE_LAZYIO)) || 476 mapping_mapped(inode->i_mapping) || 477 __ceph_caps_file_wanted(ci)) { 478 ci->i_truncate_pending++; 479 queue_trunc = 1; 480 } 481 } 482 } 483 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && 484 ci->i_truncate_size != truncate_size) { 485 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, 486 truncate_size); 487 ci->i_truncate_size = truncate_size; 488 } 489 return queue_trunc; 490 } 491 492 void ceph_fill_file_time(struct inode *inode, int issued, 493 u64 time_warp_seq, struct timespec *ctime, 494 struct timespec *mtime, struct timespec *atime) 495 { 496 struct ceph_inode_info *ci = ceph_inode(inode); 497 int warn = 0; 498 499 if (issued & (CEPH_CAP_FILE_EXCL| 500 CEPH_CAP_FILE_WR| 501 CEPH_CAP_FILE_BUFFER| 502 CEPH_CAP_AUTH_EXCL| 503 CEPH_CAP_XATTR_EXCL)) { 504 if (timespec_compare(ctime, &inode->i_ctime) > 0) { 505 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", 506 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 507 ctime->tv_sec, ctime->tv_nsec); 508 inode->i_ctime = *ctime; 509 } 510 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { 511 /* the MDS did a utimes() */ 512 dout("mtime %ld.%09ld -> %ld.%09ld " 513 "tw %d -> %d\n", 514 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 515 mtime->tv_sec, mtime->tv_nsec, 516 ci->i_time_warp_seq, (int)time_warp_seq); 517 518 inode->i_mtime = *mtime; 519 inode->i_atime = *atime; 520 ci->i_time_warp_seq = time_warp_seq; 521 } else if (time_warp_seq == ci->i_time_warp_seq) { 522 /* nobody did utimes(); take the max */ 523 if (timespec_compare(mtime, &inode->i_mtime) > 0) { 524 dout("mtime %ld.%09ld -> %ld.%09ld inc\n", 525 inode->i_mtime.tv_sec, 526 inode->i_mtime.tv_nsec, 527 mtime->tv_sec, mtime->tv_nsec); 528 inode->i_mtime = *mtime; 529 } 530 if (timespec_compare(atime, &inode->i_atime) > 0) { 531 dout("atime %ld.%09ld -> %ld.%09ld inc\n", 532 inode->i_atime.tv_sec, 533 inode->i_atime.tv_nsec, 534 atime->tv_sec, atime->tv_nsec); 535 inode->i_atime = *atime; 536 } 537 } else if (issued & CEPH_CAP_FILE_EXCL) { 538 /* we did a utimes(); ignore mds values */ 539 } else { 540 warn = 1; 541 } 542 } else { 543 /* we have no write|excl caps; whatever the MDS says is true */ 544 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { 545 inode->i_ctime = *ctime; 546 inode->i_mtime = *mtime; 547 inode->i_atime = *atime; 548 ci->i_time_warp_seq = time_warp_seq; 549 } else { 550 warn = 1; 551 } 552 } 553 if (warn) /* time_warp_seq shouldn't go backwards */ 554 dout("%p mds time_warp_seq %llu < %u\n", 555 inode, time_warp_seq, ci->i_time_warp_seq); 556 } 557 558 /* 559 * Populate an inode based on info from mds. May be called on new or 560 * existing inodes. 561 */ 562 static int fill_inode(struct inode *inode, 563 struct ceph_mds_reply_info_in *iinfo, 564 struct ceph_mds_reply_dirfrag *dirinfo, 565 struct ceph_mds_session *session, 566 unsigned long ttl_from, int cap_fmode, 567 struct ceph_cap_reservation *caps_reservation) 568 { 569 struct ceph_mds_reply_inode *info = iinfo->in; 570 struct ceph_inode_info *ci = ceph_inode(inode); 571 int i; 572 int issued = 0, implemented; 573 struct timespec mtime, atime, ctime; 574 u32 nsplits; 575 struct ceph_buffer *xattr_blob = NULL; 576 int err = 0; 577 int queue_trunc = 0; 578 579 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", 580 inode, ceph_vinop(inode), le64_to_cpu(info->version), 581 ci->i_version); 582 583 /* 584 * prealloc xattr data, if it looks like we'll need it. only 585 * if len > 4 (meaning there are actually xattrs; the first 4 586 * bytes are the xattr count). 587 */ 588 if (iinfo->xattr_len > 4) { 589 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); 590 if (!xattr_blob) 591 pr_err("fill_inode ENOMEM xattr blob %d bytes\n", 592 iinfo->xattr_len); 593 } 594 595 spin_lock(&ci->i_ceph_lock); 596 597 /* 598 * provided version will be odd if inode value is projected, 599 * even if stable. skip the update if we have newer stable 600 * info (ours>=theirs, e.g. due to racing mds replies), unless 601 * we are getting projected (unstable) info (in which case the 602 * version is odd, and we want ours>theirs). 603 * us them 604 * 2 2 skip 605 * 3 2 skip 606 * 3 3 update 607 */ 608 if (le64_to_cpu(info->version) > 0 && 609 (ci->i_version & ~1) >= le64_to_cpu(info->version)) 610 goto no_change; 611 612 issued = __ceph_caps_issued(ci, &implemented); 613 issued |= implemented | __ceph_caps_dirty(ci); 614 615 /* update inode */ 616 ci->i_version = le64_to_cpu(info->version); 617 inode->i_version++; 618 inode->i_rdev = le32_to_cpu(info->rdev); 619 620 if ((issued & CEPH_CAP_AUTH_EXCL) == 0) { 621 inode->i_mode = le32_to_cpu(info->mode); 622 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); 623 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); 624 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, 625 from_kuid(&init_user_ns, inode->i_uid), 626 from_kgid(&init_user_ns, inode->i_gid)); 627 } 628 629 if ((issued & CEPH_CAP_LINK_EXCL) == 0) 630 set_nlink(inode, le32_to_cpu(info->nlink)); 631 632 /* be careful with mtime, atime, size */ 633 ceph_decode_timespec(&atime, &info->atime); 634 ceph_decode_timespec(&mtime, &info->mtime); 635 ceph_decode_timespec(&ctime, &info->ctime); 636 queue_trunc = ceph_fill_file_size(inode, issued, 637 le32_to_cpu(info->truncate_seq), 638 le64_to_cpu(info->truncate_size), 639 le64_to_cpu(info->size)); 640 ceph_fill_file_time(inode, issued, 641 le32_to_cpu(info->time_warp_seq), 642 &ctime, &mtime, &atime); 643 644 /* only update max_size on auth cap */ 645 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 646 ci->i_max_size != le64_to_cpu(info->max_size)) { 647 dout("max_size %lld -> %llu\n", ci->i_max_size, 648 le64_to_cpu(info->max_size)); 649 ci->i_max_size = le64_to_cpu(info->max_size); 650 } 651 652 ci->i_layout = info->layout; 653 inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; 654 655 /* xattrs */ 656 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ 657 if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && 658 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { 659 if (ci->i_xattrs.blob) 660 ceph_buffer_put(ci->i_xattrs.blob); 661 ci->i_xattrs.blob = xattr_blob; 662 if (xattr_blob) 663 memcpy(ci->i_xattrs.blob->vec.iov_base, 664 iinfo->xattr_data, iinfo->xattr_len); 665 ci->i_xattrs.version = le64_to_cpu(info->xattr_version); 666 xattr_blob = NULL; 667 } 668 669 inode->i_mapping->a_ops = &ceph_aops; 670 inode->i_mapping->backing_dev_info = 671 &ceph_sb_to_client(inode->i_sb)->backing_dev_info; 672 673 switch (inode->i_mode & S_IFMT) { 674 case S_IFIFO: 675 case S_IFBLK: 676 case S_IFCHR: 677 case S_IFSOCK: 678 init_special_inode(inode, inode->i_mode, inode->i_rdev); 679 inode->i_op = &ceph_file_iops; 680 break; 681 case S_IFREG: 682 inode->i_op = &ceph_file_iops; 683 inode->i_fop = &ceph_file_fops; 684 break; 685 case S_IFLNK: 686 inode->i_op = &ceph_symlink_iops; 687 if (!ci->i_symlink) { 688 u32 symlen = iinfo->symlink_len; 689 char *sym; 690 691 spin_unlock(&ci->i_ceph_lock); 692 693 err = -EINVAL; 694 if (WARN_ON(symlen != inode->i_size)) 695 goto out; 696 697 err = -ENOMEM; 698 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); 699 if (!sym) 700 goto out; 701 702 spin_lock(&ci->i_ceph_lock); 703 if (!ci->i_symlink) 704 ci->i_symlink = sym; 705 else 706 kfree(sym); /* lost a race */ 707 } 708 break; 709 case S_IFDIR: 710 inode->i_op = &ceph_dir_iops; 711 inode->i_fop = &ceph_dir_fops; 712 713 ci->i_dir_layout = iinfo->dir_layout; 714 715 ci->i_files = le64_to_cpu(info->files); 716 ci->i_subdirs = le64_to_cpu(info->subdirs); 717 ci->i_rbytes = le64_to_cpu(info->rbytes); 718 ci->i_rfiles = le64_to_cpu(info->rfiles); 719 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); 720 ceph_decode_timespec(&ci->i_rctime, &info->rctime); 721 break; 722 default: 723 pr_err("fill_inode %llx.%llx BAD mode 0%o\n", 724 ceph_vinop(inode), inode->i_mode); 725 } 726 727 /* set dir completion flag? */ 728 if (S_ISDIR(inode->i_mode) && 729 ci->i_files == 0 && ci->i_subdirs == 0 && 730 ceph_snap(inode) == CEPH_NOSNAP && 731 (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) && 732 (issued & CEPH_CAP_FILE_EXCL) == 0 && 733 !__ceph_dir_is_complete(ci)) { 734 dout(" marking %p complete (empty)\n", inode); 735 __ceph_dir_set_complete(ci, atomic_read(&ci->i_release_count)); 736 ci->i_max_offset = 2; 737 } 738 no_change: 739 spin_unlock(&ci->i_ceph_lock); 740 741 /* queue truncate if we saw i_size decrease */ 742 if (queue_trunc) 743 ceph_queue_vmtruncate(inode); 744 745 /* populate frag tree */ 746 /* FIXME: move me up, if/when version reflects fragtree changes */ 747 nsplits = le32_to_cpu(info->fragtree.nsplits); 748 mutex_lock(&ci->i_fragtree_mutex); 749 for (i = 0; i < nsplits; i++) { 750 u32 id = le32_to_cpu(info->fragtree.splits[i].frag); 751 struct ceph_inode_frag *frag = __get_or_create_frag(ci, id); 752 753 if (IS_ERR(frag)) 754 continue; 755 frag->split_by = le32_to_cpu(info->fragtree.splits[i].by); 756 dout(" frag %x split by %d\n", frag->frag, frag->split_by); 757 } 758 mutex_unlock(&ci->i_fragtree_mutex); 759 760 /* were we issued a capability? */ 761 if (info->cap.caps) { 762 if (ceph_snap(inode) == CEPH_NOSNAP) { 763 ceph_add_cap(inode, session, 764 le64_to_cpu(info->cap.cap_id), 765 cap_fmode, 766 le32_to_cpu(info->cap.caps), 767 le32_to_cpu(info->cap.wanted), 768 le32_to_cpu(info->cap.seq), 769 le32_to_cpu(info->cap.mseq), 770 le64_to_cpu(info->cap.realm), 771 info->cap.flags, 772 caps_reservation); 773 } else { 774 spin_lock(&ci->i_ceph_lock); 775 dout(" %p got snap_caps %s\n", inode, 776 ceph_cap_string(le32_to_cpu(info->cap.caps))); 777 ci->i_snap_caps |= le32_to_cpu(info->cap.caps); 778 if (cap_fmode >= 0) 779 __ceph_get_fmode(ci, cap_fmode); 780 spin_unlock(&ci->i_ceph_lock); 781 } 782 } else if (cap_fmode >= 0) { 783 pr_warning("mds issued no caps on %llx.%llx\n", 784 ceph_vinop(inode)); 785 __ceph_get_fmode(ci, cap_fmode); 786 } 787 788 /* update delegation info? */ 789 if (dirinfo) 790 ceph_fill_dirfrag(inode, dirinfo); 791 792 err = 0; 793 794 out: 795 if (xattr_blob) 796 ceph_buffer_put(xattr_blob); 797 return err; 798 } 799 800 /* 801 * caller should hold session s_mutex. 802 */ 803 static void update_dentry_lease(struct dentry *dentry, 804 struct ceph_mds_reply_lease *lease, 805 struct ceph_mds_session *session, 806 unsigned long from_time) 807 { 808 struct ceph_dentry_info *di = ceph_dentry(dentry); 809 long unsigned duration = le32_to_cpu(lease->duration_ms); 810 long unsigned ttl = from_time + (duration * HZ) / 1000; 811 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; 812 struct inode *dir; 813 814 /* only track leases on regular dentries */ 815 if (dentry->d_op != &ceph_dentry_ops) 816 return; 817 818 spin_lock(&dentry->d_lock); 819 dout("update_dentry_lease %p duration %lu ms ttl %lu\n", 820 dentry, duration, ttl); 821 822 /* make lease_rdcache_gen match directory */ 823 dir = dentry->d_parent->d_inode; 824 di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; 825 826 if (duration == 0) 827 goto out_unlock; 828 829 if (di->lease_gen == session->s_cap_gen && 830 time_before(ttl, dentry->d_time)) 831 goto out_unlock; /* we already have a newer lease. */ 832 833 if (di->lease_session && di->lease_session != session) 834 goto out_unlock; 835 836 ceph_dentry_lru_touch(dentry); 837 838 if (!di->lease_session) 839 di->lease_session = ceph_get_mds_session(session); 840 di->lease_gen = session->s_cap_gen; 841 di->lease_seq = le32_to_cpu(lease->seq); 842 di->lease_renew_after = half_ttl; 843 di->lease_renew_from = 0; 844 dentry->d_time = ttl; 845 out_unlock: 846 spin_unlock(&dentry->d_lock); 847 return; 848 } 849 850 /* 851 * Set dentry's directory position based on the current dir's max, and 852 * order it in d_subdirs, so that dcache_readdir behaves. 853 * 854 * Always called under directory's i_mutex. 855 */ 856 static void ceph_set_dentry_offset(struct dentry *dn) 857 { 858 struct dentry *dir = dn->d_parent; 859 struct inode *inode = dir->d_inode; 860 struct ceph_inode_info *ci; 861 struct ceph_dentry_info *di; 862 863 BUG_ON(!inode); 864 865 ci = ceph_inode(inode); 866 di = ceph_dentry(dn); 867 868 spin_lock(&ci->i_ceph_lock); 869 if (!__ceph_dir_is_complete(ci)) { 870 spin_unlock(&ci->i_ceph_lock); 871 return; 872 } 873 di->offset = ceph_inode(inode)->i_max_offset++; 874 spin_unlock(&ci->i_ceph_lock); 875 876 spin_lock(&dir->d_lock); 877 spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); 878 list_move(&dn->d_u.d_child, &dir->d_subdirs); 879 dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset, 880 dn->d_u.d_child.prev, dn->d_u.d_child.next); 881 spin_unlock(&dn->d_lock); 882 spin_unlock(&dir->d_lock); 883 } 884 885 /* 886 * splice a dentry to an inode. 887 * caller must hold directory i_mutex for this to be safe. 888 * 889 * we will only rehash the resulting dentry if @prehash is 890 * true; @prehash will be set to false (for the benefit of 891 * the caller) if we fail. 892 */ 893 static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, 894 bool *prehash, bool set_offset) 895 { 896 struct dentry *realdn; 897 898 BUG_ON(dn->d_inode); 899 900 /* dn must be unhashed */ 901 if (!d_unhashed(dn)) 902 d_drop(dn); 903 realdn = d_materialise_unique(dn, in); 904 if (IS_ERR(realdn)) { 905 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", 906 PTR_ERR(realdn), dn, in, ceph_vinop(in)); 907 if (prehash) 908 *prehash = false; /* don't rehash on error */ 909 dn = realdn; /* note realdn contains the error */ 910 goto out; 911 } else if (realdn) { 912 dout("dn %p (%d) spliced with %p (%d) " 913 "inode %p ino %llx.%llx\n", 914 dn, d_count(dn), 915 realdn, d_count(realdn), 916 realdn->d_inode, ceph_vinop(realdn->d_inode)); 917 dput(dn); 918 dn = realdn; 919 } else { 920 BUG_ON(!ceph_dentry(dn)); 921 dout("dn %p attached to %p ino %llx.%llx\n", 922 dn, dn->d_inode, ceph_vinop(dn->d_inode)); 923 } 924 if ((!prehash || *prehash) && d_unhashed(dn)) 925 d_rehash(dn); 926 if (set_offset) 927 ceph_set_dentry_offset(dn); 928 out: 929 return dn; 930 } 931 932 /* 933 * Incorporate results into the local cache. This is either just 934 * one inode, or a directory, dentry, and possibly linked-to inode (e.g., 935 * after a lookup). 936 * 937 * A reply may contain 938 * a directory inode along with a dentry. 939 * and/or a target inode 940 * 941 * Called with snap_rwsem (read). 942 */ 943 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, 944 struct ceph_mds_session *session) 945 { 946 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 947 struct inode *in = NULL; 948 struct ceph_mds_reply_inode *ininfo; 949 struct ceph_vino vino; 950 struct ceph_fs_client *fsc = ceph_sb_to_client(sb); 951 int i = 0; 952 int err = 0; 953 954 dout("fill_trace %p is_dentry %d is_target %d\n", req, 955 rinfo->head->is_dentry, rinfo->head->is_target); 956 957 #if 0 958 /* 959 * Debugging hook: 960 * 961 * If we resend completed ops to a recovering mds, we get no 962 * trace. Since that is very rare, pretend this is the case 963 * to ensure the 'no trace' handlers in the callers behave. 964 * 965 * Fill in inodes unconditionally to avoid breaking cap 966 * invariants. 967 */ 968 if (rinfo->head->op & CEPH_MDS_OP_WRITE) { 969 pr_info("fill_trace faking empty trace on %lld %s\n", 970 req->r_tid, ceph_mds_op_name(rinfo->head->op)); 971 if (rinfo->head->is_dentry) { 972 rinfo->head->is_dentry = 0; 973 err = fill_inode(req->r_locked_dir, 974 &rinfo->diri, rinfo->dirfrag, 975 session, req->r_request_started, -1); 976 } 977 if (rinfo->head->is_target) { 978 rinfo->head->is_target = 0; 979 ininfo = rinfo->targeti.in; 980 vino.ino = le64_to_cpu(ininfo->ino); 981 vino.snap = le64_to_cpu(ininfo->snapid); 982 in = ceph_get_inode(sb, vino); 983 err = fill_inode(in, &rinfo->targeti, NULL, 984 session, req->r_request_started, 985 req->r_fmode); 986 iput(in); 987 } 988 } 989 #endif 990 991 if (!rinfo->head->is_target && !rinfo->head->is_dentry) { 992 dout("fill_trace reply is empty!\n"); 993 if (rinfo->head->result == 0 && req->r_locked_dir) 994 ceph_invalidate_dir_request(req); 995 return 0; 996 } 997 998 if (rinfo->head->is_dentry) { 999 struct inode *dir = req->r_locked_dir; 1000 1001 if (dir) { 1002 err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, 1003 session, req->r_request_started, -1, 1004 &req->r_caps_reservation); 1005 if (err < 0) 1006 return err; 1007 } else { 1008 WARN_ON_ONCE(1); 1009 } 1010 } 1011 1012 /* 1013 * ignore null lease/binding on snapdir ENOENT, or else we 1014 * will have trouble splicing in the virtual snapdir later 1015 */ 1016 if (rinfo->head->is_dentry && !req->r_aborted && 1017 req->r_locked_dir && 1018 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, 1019 fsc->mount_options->snapdir_name, 1020 req->r_dentry->d_name.len))) { 1021 /* 1022 * lookup link rename : null -> possibly existing inode 1023 * mknod symlink mkdir : null -> new inode 1024 * unlink : linked -> null 1025 */ 1026 struct inode *dir = req->r_locked_dir; 1027 struct dentry *dn = req->r_dentry; 1028 bool have_dir_cap, have_lease; 1029 1030 BUG_ON(!dn); 1031 BUG_ON(!dir); 1032 BUG_ON(dn->d_parent->d_inode != dir); 1033 BUG_ON(ceph_ino(dir) != 1034 le64_to_cpu(rinfo->diri.in->ino)); 1035 BUG_ON(ceph_snap(dir) != 1036 le64_to_cpu(rinfo->diri.in->snapid)); 1037 1038 /* do we have a lease on the whole dir? */ 1039 have_dir_cap = 1040 (le32_to_cpu(rinfo->diri.in->cap.caps) & 1041 CEPH_CAP_FILE_SHARED); 1042 1043 /* do we have a dn lease? */ 1044 have_lease = have_dir_cap || 1045 le32_to_cpu(rinfo->dlease->duration_ms); 1046 if (!have_lease) 1047 dout("fill_trace no dentry lease or dir cap\n"); 1048 1049 /* rename? */ 1050 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { 1051 dout(" src %p '%.*s' dst %p '%.*s'\n", 1052 req->r_old_dentry, 1053 req->r_old_dentry->d_name.len, 1054 req->r_old_dentry->d_name.name, 1055 dn, dn->d_name.len, dn->d_name.name); 1056 dout("fill_trace doing d_move %p -> %p\n", 1057 req->r_old_dentry, dn); 1058 1059 d_move(req->r_old_dentry, dn); 1060 dout(" src %p '%.*s' dst %p '%.*s'\n", 1061 req->r_old_dentry, 1062 req->r_old_dentry->d_name.len, 1063 req->r_old_dentry->d_name.name, 1064 dn, dn->d_name.len, dn->d_name.name); 1065 1066 /* ensure target dentry is invalidated, despite 1067 rehashing bug in vfs_rename_dir */ 1068 ceph_invalidate_dentry_lease(dn); 1069 1070 /* 1071 * d_move() puts the renamed dentry at the end of 1072 * d_subdirs. We need to assign it an appropriate 1073 * directory offset so we can behave when dir is 1074 * complete. 1075 */ 1076 ceph_set_dentry_offset(req->r_old_dentry); 1077 dout("dn %p gets new offset %lld\n", req->r_old_dentry, 1078 ceph_dentry(req->r_old_dentry)->offset); 1079 1080 dn = req->r_old_dentry; /* use old_dentry */ 1081 in = dn->d_inode; 1082 } 1083 1084 /* null dentry? */ 1085 if (!rinfo->head->is_target) { 1086 dout("fill_trace null dentry\n"); 1087 if (dn->d_inode) { 1088 dout("d_delete %p\n", dn); 1089 d_delete(dn); 1090 } else { 1091 dout("d_instantiate %p NULL\n", dn); 1092 d_instantiate(dn, NULL); 1093 if (have_lease && d_unhashed(dn)) 1094 d_rehash(dn); 1095 update_dentry_lease(dn, rinfo->dlease, 1096 session, 1097 req->r_request_started); 1098 } 1099 goto done; 1100 } 1101 1102 /* attach proper inode */ 1103 ininfo = rinfo->targeti.in; 1104 vino.ino = le64_to_cpu(ininfo->ino); 1105 vino.snap = le64_to_cpu(ininfo->snapid); 1106 in = dn->d_inode; 1107 if (!in) { 1108 in = ceph_get_inode(sb, vino); 1109 if (IS_ERR(in)) { 1110 pr_err("fill_trace bad get_inode " 1111 "%llx.%llx\n", vino.ino, vino.snap); 1112 err = PTR_ERR(in); 1113 d_drop(dn); 1114 goto done; 1115 } 1116 dn = splice_dentry(dn, in, &have_lease, true); 1117 if (IS_ERR(dn)) { 1118 err = PTR_ERR(dn); 1119 goto done; 1120 } 1121 req->r_dentry = dn; /* may have spliced */ 1122 ihold(in); 1123 } else if (ceph_ino(in) == vino.ino && 1124 ceph_snap(in) == vino.snap) { 1125 ihold(in); 1126 } else { 1127 dout(" %p links to %p %llx.%llx, not %llx.%llx\n", 1128 dn, in, ceph_ino(in), ceph_snap(in), 1129 vino.ino, vino.snap); 1130 have_lease = false; 1131 in = NULL; 1132 } 1133 1134 if (have_lease) 1135 update_dentry_lease(dn, rinfo->dlease, session, 1136 req->r_request_started); 1137 dout(" final dn %p\n", dn); 1138 i++; 1139 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || 1140 req->r_op == CEPH_MDS_OP_MKSNAP) && !req->r_aborted) { 1141 struct dentry *dn = req->r_dentry; 1142 1143 /* fill out a snapdir LOOKUPSNAP dentry */ 1144 BUG_ON(!dn); 1145 BUG_ON(!req->r_locked_dir); 1146 BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR); 1147 ininfo = rinfo->targeti.in; 1148 vino.ino = le64_to_cpu(ininfo->ino); 1149 vino.snap = le64_to_cpu(ininfo->snapid); 1150 in = ceph_get_inode(sb, vino); 1151 if (IS_ERR(in)) { 1152 pr_err("fill_inode get_inode badness %llx.%llx\n", 1153 vino.ino, vino.snap); 1154 err = PTR_ERR(in); 1155 d_delete(dn); 1156 goto done; 1157 } 1158 dout(" linking snapped dir %p to dn %p\n", in, dn); 1159 dn = splice_dentry(dn, in, NULL, true); 1160 if (IS_ERR(dn)) { 1161 err = PTR_ERR(dn); 1162 goto done; 1163 } 1164 req->r_dentry = dn; /* may have spliced */ 1165 ihold(in); 1166 rinfo->head->is_dentry = 1; /* fool notrace handlers */ 1167 } 1168 1169 if (rinfo->head->is_target) { 1170 vino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1171 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1172 1173 if (in == NULL || ceph_ino(in) != vino.ino || 1174 ceph_snap(in) != vino.snap) { 1175 in = ceph_get_inode(sb, vino); 1176 if (IS_ERR(in)) { 1177 err = PTR_ERR(in); 1178 goto done; 1179 } 1180 } 1181 req->r_target_inode = in; 1182 1183 err = fill_inode(in, 1184 &rinfo->targeti, NULL, 1185 session, req->r_request_started, 1186 (le32_to_cpu(rinfo->head->result) == 0) ? 1187 req->r_fmode : -1, 1188 &req->r_caps_reservation); 1189 if (err < 0) { 1190 pr_err("fill_inode badness %p %llx.%llx\n", 1191 in, ceph_vinop(in)); 1192 goto done; 1193 } 1194 } 1195 1196 done: 1197 dout("fill_trace done err=%d\n", err); 1198 return err; 1199 } 1200 1201 /* 1202 * Prepopulate our cache with readdir results, leases, etc. 1203 */ 1204 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, 1205 struct ceph_mds_session *session) 1206 { 1207 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1208 int i, err = 0; 1209 1210 for (i = 0; i < rinfo->dir_nr; i++) { 1211 struct ceph_vino vino; 1212 struct inode *in; 1213 int rc; 1214 1215 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); 1216 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); 1217 1218 in = ceph_get_inode(req->r_dentry->d_sb, vino); 1219 if (IS_ERR(in)) { 1220 err = PTR_ERR(in); 1221 dout("new_inode badness got %d\n", err); 1222 continue; 1223 } 1224 rc = fill_inode(in, &rinfo->dir_in[i], NULL, session, 1225 req->r_request_started, -1, 1226 &req->r_caps_reservation); 1227 if (rc < 0) { 1228 pr_err("fill_inode badness on %p got %d\n", in, rc); 1229 err = rc; 1230 continue; 1231 } 1232 } 1233 1234 return err; 1235 } 1236 1237 int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1238 struct ceph_mds_session *session) 1239 { 1240 struct dentry *parent = req->r_dentry; 1241 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1242 struct qstr dname; 1243 struct dentry *dn; 1244 struct inode *in; 1245 int err = 0, i; 1246 struct inode *snapdir = NULL; 1247 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; 1248 u64 frag = le32_to_cpu(rhead->args.readdir.frag); 1249 struct ceph_dentry_info *di; 1250 1251 if (req->r_aborted) 1252 return readdir_prepopulate_inodes_only(req, session); 1253 1254 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { 1255 snapdir = ceph_get_snapdir(parent->d_inode); 1256 parent = d_find_alias(snapdir); 1257 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", 1258 rinfo->dir_nr, parent); 1259 } else { 1260 dout("readdir_prepopulate %d items under dn %p\n", 1261 rinfo->dir_nr, parent); 1262 if (rinfo->dir_dir) 1263 ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir); 1264 } 1265 1266 for (i = 0; i < rinfo->dir_nr; i++) { 1267 struct ceph_vino vino; 1268 1269 dname.name = rinfo->dir_dname[i]; 1270 dname.len = rinfo->dir_dname_len[i]; 1271 dname.hash = full_name_hash(dname.name, dname.len); 1272 1273 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); 1274 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); 1275 1276 retry_lookup: 1277 dn = d_lookup(parent, &dname); 1278 dout("d_lookup on parent=%p name=%.*s got %p\n", 1279 parent, dname.len, dname.name, dn); 1280 1281 if (!dn) { 1282 dn = d_alloc(parent, &dname); 1283 dout("d_alloc %p '%.*s' = %p\n", parent, 1284 dname.len, dname.name, dn); 1285 if (dn == NULL) { 1286 dout("d_alloc badness\n"); 1287 err = -ENOMEM; 1288 goto out; 1289 } 1290 err = ceph_init_dentry(dn); 1291 if (err < 0) { 1292 dput(dn); 1293 goto out; 1294 } 1295 } else if (dn->d_inode && 1296 (ceph_ino(dn->d_inode) != vino.ino || 1297 ceph_snap(dn->d_inode) != vino.snap)) { 1298 dout(" dn %p points to wrong inode %p\n", 1299 dn, dn->d_inode); 1300 d_delete(dn); 1301 dput(dn); 1302 goto retry_lookup; 1303 } else { 1304 /* reorder parent's d_subdirs */ 1305 spin_lock(&parent->d_lock); 1306 spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); 1307 list_move(&dn->d_u.d_child, &parent->d_subdirs); 1308 spin_unlock(&dn->d_lock); 1309 spin_unlock(&parent->d_lock); 1310 } 1311 1312 di = dn->d_fsdata; 1313 di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset); 1314 1315 /* inode */ 1316 if (dn->d_inode) { 1317 in = dn->d_inode; 1318 } else { 1319 in = ceph_get_inode(parent->d_sb, vino); 1320 if (IS_ERR(in)) { 1321 dout("new_inode badness\n"); 1322 d_drop(dn); 1323 dput(dn); 1324 err = PTR_ERR(in); 1325 goto out; 1326 } 1327 dn = splice_dentry(dn, in, NULL, false); 1328 if (IS_ERR(dn)) 1329 dn = NULL; 1330 } 1331 1332 if (fill_inode(in, &rinfo->dir_in[i], NULL, session, 1333 req->r_request_started, -1, 1334 &req->r_caps_reservation) < 0) { 1335 pr_err("fill_inode badness on %p\n", in); 1336 goto next_item; 1337 } 1338 if (dn) 1339 update_dentry_lease(dn, rinfo->dir_dlease[i], 1340 req->r_session, 1341 req->r_request_started); 1342 next_item: 1343 if (dn) 1344 dput(dn); 1345 } 1346 req->r_did_prepopulate = true; 1347 1348 out: 1349 if (snapdir) { 1350 iput(snapdir); 1351 dput(parent); 1352 } 1353 dout("readdir_prepopulate done\n"); 1354 return err; 1355 } 1356 1357 int ceph_inode_set_size(struct inode *inode, loff_t size) 1358 { 1359 struct ceph_inode_info *ci = ceph_inode(inode); 1360 int ret = 0; 1361 1362 spin_lock(&ci->i_ceph_lock); 1363 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); 1364 inode->i_size = size; 1365 inode->i_blocks = (size + (1 << 9) - 1) >> 9; 1366 1367 /* tell the MDS if we are approaching max_size */ 1368 if ((size << 1) >= ci->i_max_size && 1369 (ci->i_reported_size << 1) < ci->i_max_size) 1370 ret = 1; 1371 1372 spin_unlock(&ci->i_ceph_lock); 1373 return ret; 1374 } 1375 1376 /* 1377 * Write back inode data in a worker thread. (This can't be done 1378 * in the message handler context.) 1379 */ 1380 void ceph_queue_writeback(struct inode *inode) 1381 { 1382 ihold(inode); 1383 if (queue_work(ceph_inode_to_client(inode)->wb_wq, 1384 &ceph_inode(inode)->i_wb_work)) { 1385 dout("ceph_queue_writeback %p\n", inode); 1386 } else { 1387 dout("ceph_queue_writeback %p failed\n", inode); 1388 iput(inode); 1389 } 1390 } 1391 1392 static void ceph_writeback_work(struct work_struct *work) 1393 { 1394 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 1395 i_wb_work); 1396 struct inode *inode = &ci->vfs_inode; 1397 1398 dout("writeback %p\n", inode); 1399 filemap_fdatawrite(&inode->i_data); 1400 iput(inode); 1401 } 1402 1403 /* 1404 * queue an async invalidation 1405 */ 1406 void ceph_queue_invalidate(struct inode *inode) 1407 { 1408 ihold(inode); 1409 if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, 1410 &ceph_inode(inode)->i_pg_inv_work)) { 1411 dout("ceph_queue_invalidate %p\n", inode); 1412 } else { 1413 dout("ceph_queue_invalidate %p failed\n", inode); 1414 iput(inode); 1415 } 1416 } 1417 1418 /* 1419 * Invalidate inode pages in a worker thread. (This can't be done 1420 * in the message handler context.) 1421 */ 1422 static void ceph_invalidate_work(struct work_struct *work) 1423 { 1424 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 1425 i_pg_inv_work); 1426 struct inode *inode = &ci->vfs_inode; 1427 u32 orig_gen; 1428 int check = 0; 1429 1430 spin_lock(&ci->i_ceph_lock); 1431 dout("invalidate_pages %p gen %d revoking %d\n", inode, 1432 ci->i_rdcache_gen, ci->i_rdcache_revoking); 1433 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { 1434 /* nevermind! */ 1435 spin_unlock(&ci->i_ceph_lock); 1436 goto out; 1437 } 1438 orig_gen = ci->i_rdcache_gen; 1439 spin_unlock(&ci->i_ceph_lock); 1440 1441 truncate_inode_pages(&inode->i_data, 0); 1442 1443 spin_lock(&ci->i_ceph_lock); 1444 if (orig_gen == ci->i_rdcache_gen && 1445 orig_gen == ci->i_rdcache_revoking) { 1446 dout("invalidate_pages %p gen %d successful\n", inode, 1447 ci->i_rdcache_gen); 1448 ci->i_rdcache_revoking--; 1449 check = 1; 1450 } else { 1451 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", 1452 inode, orig_gen, ci->i_rdcache_gen, 1453 ci->i_rdcache_revoking); 1454 } 1455 spin_unlock(&ci->i_ceph_lock); 1456 1457 if (check) 1458 ceph_check_caps(ci, 0, NULL); 1459 out: 1460 iput(inode); 1461 } 1462 1463 1464 /* 1465 * called by trunc_wq; 1466 * 1467 * We also truncate in a separate thread as well. 1468 */ 1469 static void ceph_vmtruncate_work(struct work_struct *work) 1470 { 1471 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 1472 i_vmtruncate_work); 1473 struct inode *inode = &ci->vfs_inode; 1474 1475 dout("vmtruncate_work %p\n", inode); 1476 if (!mutex_trylock(&inode->i_mutex)) { 1477 /* 1478 * the i_mutex can be hold by a writer who is waiting for 1479 * caps. wake up waiters, they will do pending vmtruncate. 1480 */ 1481 wake_up_all(&ci->i_cap_wq); 1482 mutex_lock(&inode->i_mutex); 1483 } 1484 __ceph_do_pending_vmtruncate(inode); 1485 mutex_unlock(&inode->i_mutex); 1486 iput(inode); 1487 } 1488 1489 /* 1490 * Queue an async vmtruncate. If we fail to queue work, we will handle 1491 * the truncation the next time we call __ceph_do_pending_vmtruncate. 1492 */ 1493 void ceph_queue_vmtruncate(struct inode *inode) 1494 { 1495 struct ceph_inode_info *ci = ceph_inode(inode); 1496 1497 ihold(inode); 1498 if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, 1499 &ci->i_vmtruncate_work)) { 1500 dout("ceph_queue_vmtruncate %p\n", inode); 1501 } else { 1502 dout("ceph_queue_vmtruncate %p failed, pending=%d\n", 1503 inode, ci->i_truncate_pending); 1504 iput(inode); 1505 } 1506 } 1507 1508 /* 1509 * Make sure any pending truncation is applied before doing anything 1510 * that may depend on it. 1511 */ 1512 void __ceph_do_pending_vmtruncate(struct inode *inode) 1513 { 1514 struct ceph_inode_info *ci = ceph_inode(inode); 1515 u64 to; 1516 int wrbuffer_refs, finish = 0; 1517 1518 retry: 1519 spin_lock(&ci->i_ceph_lock); 1520 if (ci->i_truncate_pending == 0) { 1521 dout("__do_pending_vmtruncate %p none pending\n", inode); 1522 spin_unlock(&ci->i_ceph_lock); 1523 return; 1524 } 1525 1526 /* 1527 * make sure any dirty snapped pages are flushed before we 1528 * possibly truncate them.. so write AND block! 1529 */ 1530 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { 1531 dout("__do_pending_vmtruncate %p flushing snaps first\n", 1532 inode); 1533 spin_unlock(&ci->i_ceph_lock); 1534 filemap_write_and_wait_range(&inode->i_data, 0, 1535 inode->i_sb->s_maxbytes); 1536 goto retry; 1537 } 1538 1539 to = ci->i_truncate_size; 1540 wrbuffer_refs = ci->i_wrbuffer_ref; 1541 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, 1542 ci->i_truncate_pending, to); 1543 spin_unlock(&ci->i_ceph_lock); 1544 1545 truncate_inode_pages(inode->i_mapping, to); 1546 1547 spin_lock(&ci->i_ceph_lock); 1548 if (to == ci->i_truncate_size) { 1549 ci->i_truncate_pending = 0; 1550 finish = 1; 1551 } 1552 spin_unlock(&ci->i_ceph_lock); 1553 if (!finish) 1554 goto retry; 1555 1556 if (wrbuffer_refs == 0) 1557 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); 1558 1559 wake_up_all(&ci->i_cap_wq); 1560 } 1561 1562 1563 /* 1564 * symlinks 1565 */ 1566 static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd) 1567 { 1568 struct ceph_inode_info *ci = ceph_inode(dentry->d_inode); 1569 nd_set_link(nd, ci->i_symlink); 1570 return NULL; 1571 } 1572 1573 static const struct inode_operations ceph_symlink_iops = { 1574 .readlink = generic_readlink, 1575 .follow_link = ceph_sym_follow_link, 1576 .setattr = ceph_setattr, 1577 .getattr = ceph_getattr, 1578 .setxattr = ceph_setxattr, 1579 .getxattr = ceph_getxattr, 1580 .listxattr = ceph_listxattr, 1581 .removexattr = ceph_removexattr, 1582 }; 1583 1584 /* 1585 * setattr 1586 */ 1587 int ceph_setattr(struct dentry *dentry, struct iattr *attr) 1588 { 1589 struct inode *inode = dentry->d_inode; 1590 struct ceph_inode_info *ci = ceph_inode(inode); 1591 struct inode *parent_inode; 1592 const unsigned int ia_valid = attr->ia_valid; 1593 struct ceph_mds_request *req; 1594 struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc; 1595 int issued; 1596 int release = 0, dirtied = 0; 1597 int mask = 0; 1598 int err = 0; 1599 int inode_dirty_flags = 0; 1600 1601 if (ceph_snap(inode) != CEPH_NOSNAP) 1602 return -EROFS; 1603 1604 __ceph_do_pending_vmtruncate(inode); 1605 1606 err = inode_change_ok(inode, attr); 1607 if (err != 0) 1608 return err; 1609 1610 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, 1611 USE_AUTH_MDS); 1612 if (IS_ERR(req)) 1613 return PTR_ERR(req); 1614 1615 spin_lock(&ci->i_ceph_lock); 1616 issued = __ceph_caps_issued(ci, NULL); 1617 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); 1618 1619 if (ia_valid & ATTR_UID) { 1620 dout("setattr %p uid %d -> %d\n", inode, 1621 from_kuid(&init_user_ns, inode->i_uid), 1622 from_kuid(&init_user_ns, attr->ia_uid)); 1623 if (issued & CEPH_CAP_AUTH_EXCL) { 1624 inode->i_uid = attr->ia_uid; 1625 dirtied |= CEPH_CAP_AUTH_EXCL; 1626 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 1627 !uid_eq(attr->ia_uid, inode->i_uid)) { 1628 req->r_args.setattr.uid = cpu_to_le32( 1629 from_kuid(&init_user_ns, attr->ia_uid)); 1630 mask |= CEPH_SETATTR_UID; 1631 release |= CEPH_CAP_AUTH_SHARED; 1632 } 1633 } 1634 if (ia_valid & ATTR_GID) { 1635 dout("setattr %p gid %d -> %d\n", inode, 1636 from_kgid(&init_user_ns, inode->i_gid), 1637 from_kgid(&init_user_ns, attr->ia_gid)); 1638 if (issued & CEPH_CAP_AUTH_EXCL) { 1639 inode->i_gid = attr->ia_gid; 1640 dirtied |= CEPH_CAP_AUTH_EXCL; 1641 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 1642 !gid_eq(attr->ia_gid, inode->i_gid)) { 1643 req->r_args.setattr.gid = cpu_to_le32( 1644 from_kgid(&init_user_ns, attr->ia_gid)); 1645 mask |= CEPH_SETATTR_GID; 1646 release |= CEPH_CAP_AUTH_SHARED; 1647 } 1648 } 1649 if (ia_valid & ATTR_MODE) { 1650 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, 1651 attr->ia_mode); 1652 if (issued & CEPH_CAP_AUTH_EXCL) { 1653 inode->i_mode = attr->ia_mode; 1654 dirtied |= CEPH_CAP_AUTH_EXCL; 1655 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 1656 attr->ia_mode != inode->i_mode) { 1657 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); 1658 mask |= CEPH_SETATTR_MODE; 1659 release |= CEPH_CAP_AUTH_SHARED; 1660 } 1661 } 1662 1663 if (ia_valid & ATTR_ATIME) { 1664 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, 1665 inode->i_atime.tv_sec, inode->i_atime.tv_nsec, 1666 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); 1667 if (issued & CEPH_CAP_FILE_EXCL) { 1668 ci->i_time_warp_seq++; 1669 inode->i_atime = attr->ia_atime; 1670 dirtied |= CEPH_CAP_FILE_EXCL; 1671 } else if ((issued & CEPH_CAP_FILE_WR) && 1672 timespec_compare(&inode->i_atime, 1673 &attr->ia_atime) < 0) { 1674 inode->i_atime = attr->ia_atime; 1675 dirtied |= CEPH_CAP_FILE_WR; 1676 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 1677 !timespec_equal(&inode->i_atime, &attr->ia_atime)) { 1678 ceph_encode_timespec(&req->r_args.setattr.atime, 1679 &attr->ia_atime); 1680 mask |= CEPH_SETATTR_ATIME; 1681 release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | 1682 CEPH_CAP_FILE_WR; 1683 } 1684 } 1685 if (ia_valid & ATTR_MTIME) { 1686 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, 1687 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 1688 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); 1689 if (issued & CEPH_CAP_FILE_EXCL) { 1690 ci->i_time_warp_seq++; 1691 inode->i_mtime = attr->ia_mtime; 1692 dirtied |= CEPH_CAP_FILE_EXCL; 1693 } else if ((issued & CEPH_CAP_FILE_WR) && 1694 timespec_compare(&inode->i_mtime, 1695 &attr->ia_mtime) < 0) { 1696 inode->i_mtime = attr->ia_mtime; 1697 dirtied |= CEPH_CAP_FILE_WR; 1698 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 1699 !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { 1700 ceph_encode_timespec(&req->r_args.setattr.mtime, 1701 &attr->ia_mtime); 1702 mask |= CEPH_SETATTR_MTIME; 1703 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | 1704 CEPH_CAP_FILE_WR; 1705 } 1706 } 1707 if (ia_valid & ATTR_SIZE) { 1708 dout("setattr %p size %lld -> %lld\n", inode, 1709 inode->i_size, attr->ia_size); 1710 if (attr->ia_size > inode->i_sb->s_maxbytes) { 1711 err = -EINVAL; 1712 goto out; 1713 } 1714 if ((issued & CEPH_CAP_FILE_EXCL) && 1715 attr->ia_size > inode->i_size) { 1716 inode->i_size = attr->ia_size; 1717 inode->i_blocks = 1718 (attr->ia_size + (1 << 9) - 1) >> 9; 1719 inode->i_ctime = attr->ia_ctime; 1720 ci->i_reported_size = attr->ia_size; 1721 dirtied |= CEPH_CAP_FILE_EXCL; 1722 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 1723 attr->ia_size != inode->i_size) { 1724 req->r_args.setattr.size = cpu_to_le64(attr->ia_size); 1725 req->r_args.setattr.old_size = 1726 cpu_to_le64(inode->i_size); 1727 mask |= CEPH_SETATTR_SIZE; 1728 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | 1729 CEPH_CAP_FILE_WR; 1730 } 1731 } 1732 1733 /* these do nothing */ 1734 if (ia_valid & ATTR_CTIME) { 1735 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| 1736 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; 1737 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, 1738 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 1739 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, 1740 only ? "ctime only" : "ignored"); 1741 inode->i_ctime = attr->ia_ctime; 1742 if (only) { 1743 /* 1744 * if kernel wants to dirty ctime but nothing else, 1745 * we need to choose a cap to dirty under, or do 1746 * a almost-no-op setattr 1747 */ 1748 if (issued & CEPH_CAP_AUTH_EXCL) 1749 dirtied |= CEPH_CAP_AUTH_EXCL; 1750 else if (issued & CEPH_CAP_FILE_EXCL) 1751 dirtied |= CEPH_CAP_FILE_EXCL; 1752 else if (issued & CEPH_CAP_XATTR_EXCL) 1753 dirtied |= CEPH_CAP_XATTR_EXCL; 1754 else 1755 mask |= CEPH_SETATTR_CTIME; 1756 } 1757 } 1758 if (ia_valid & ATTR_FILE) 1759 dout("setattr %p ATTR_FILE ... hrm!\n", inode); 1760 1761 if (dirtied) { 1762 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied); 1763 inode->i_ctime = CURRENT_TIME; 1764 } 1765 1766 release &= issued; 1767 spin_unlock(&ci->i_ceph_lock); 1768 1769 if (inode_dirty_flags) 1770 __mark_inode_dirty(inode, inode_dirty_flags); 1771 1772 if (mask) { 1773 req->r_inode = inode; 1774 ihold(inode); 1775 req->r_inode_drop = release; 1776 req->r_args.setattr.mask = cpu_to_le32(mask); 1777 req->r_num_caps = 1; 1778 parent_inode = ceph_get_dentry_parent_inode(dentry); 1779 err = ceph_mdsc_do_request(mdsc, parent_inode, req); 1780 iput(parent_inode); 1781 } 1782 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, 1783 ceph_cap_string(dirtied), mask); 1784 1785 ceph_mdsc_put_request(req); 1786 __ceph_do_pending_vmtruncate(inode); 1787 return err; 1788 out: 1789 spin_unlock(&ci->i_ceph_lock); 1790 ceph_mdsc_put_request(req); 1791 return err; 1792 } 1793 1794 /* 1795 * Verify that we have a lease on the given mask. If not, 1796 * do a getattr against an mds. 1797 */ 1798 int ceph_do_getattr(struct inode *inode, int mask) 1799 { 1800 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); 1801 struct ceph_mds_client *mdsc = fsc->mdsc; 1802 struct ceph_mds_request *req; 1803 int err; 1804 1805 if (ceph_snap(inode) == CEPH_SNAPDIR) { 1806 dout("do_getattr inode %p SNAPDIR\n", inode); 1807 return 0; 1808 } 1809 1810 dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode); 1811 if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) 1812 return 0; 1813 1814 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); 1815 if (IS_ERR(req)) 1816 return PTR_ERR(req); 1817 req->r_inode = inode; 1818 ihold(inode); 1819 req->r_num_caps = 1; 1820 req->r_args.getattr.mask = cpu_to_le32(mask); 1821 err = ceph_mdsc_do_request(mdsc, NULL, req); 1822 ceph_mdsc_put_request(req); 1823 dout("do_getattr result=%d\n", err); 1824 return err; 1825 } 1826 1827 1828 /* 1829 * Check inode permissions. We verify we have a valid value for 1830 * the AUTH cap, then call the generic handler. 1831 */ 1832 int ceph_permission(struct inode *inode, int mask) 1833 { 1834 int err; 1835 1836 if (mask & MAY_NOT_BLOCK) 1837 return -ECHILD; 1838 1839 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED); 1840 1841 if (!err) 1842 err = generic_permission(inode, mask); 1843 return err; 1844 } 1845 1846 /* 1847 * Get all attributes. Hopefully somedata we'll have a statlite() 1848 * and can limit the fields we require to be accurate. 1849 */ 1850 int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, 1851 struct kstat *stat) 1852 { 1853 struct inode *inode = dentry->d_inode; 1854 struct ceph_inode_info *ci = ceph_inode(inode); 1855 int err; 1856 1857 err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL); 1858 if (!err) { 1859 generic_fillattr(inode, stat); 1860 stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino); 1861 if (ceph_snap(inode) != CEPH_NOSNAP) 1862 stat->dev = ceph_snap(inode); 1863 else 1864 stat->dev = 0; 1865 if (S_ISDIR(inode->i_mode)) { 1866 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), 1867 RBYTES)) 1868 stat->size = ci->i_rbytes; 1869 else 1870 stat->size = ci->i_files + ci->i_subdirs; 1871 stat->blocks = 0; 1872 stat->blksize = 65536; 1873 } 1874 } 1875 return err; 1876 } 1877