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 #include <linux/posix_acl.h> 13 #include <linux/random.h> 14 15 #include "super.h" 16 #include "mds_client.h" 17 #include "cache.h" 18 #include <linux/ceph/decode.h> 19 20 /* 21 * Ceph inode operations 22 * 23 * Implement basic inode helpers (get, alloc) and inode ops (getattr, 24 * setattr, etc.), xattr helpers, and helpers for assimilating 25 * metadata returned by the MDS into our cache. 26 * 27 * Also define helpers for doing asynchronous writeback, invalidation, 28 * and truncation for the benefit of those who can't afford to block 29 * (typically because they are in the message handler path). 30 */ 31 32 static const struct inode_operations ceph_symlink_iops; 33 34 static void ceph_invalidate_work(struct work_struct *work); 35 static void ceph_writeback_work(struct work_struct *work); 36 static void ceph_vmtruncate_work(struct work_struct *work); 37 38 /* 39 * find or create an inode, given the ceph ino number 40 */ 41 static int ceph_set_ino_cb(struct inode *inode, void *data) 42 { 43 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; 44 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); 45 return 0; 46 } 47 48 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) 49 { 50 struct inode *inode; 51 ino_t t = ceph_vino_to_ino(vino); 52 53 inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); 54 if (inode == NULL) 55 return ERR_PTR(-ENOMEM); 56 if (inode->i_state & I_NEW) { 57 dout("get_inode created new inode %p %llx.%llx ino %llx\n", 58 inode, ceph_vinop(inode), (u64)inode->i_ino); 59 unlock_new_inode(inode); 60 } 61 62 dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, 63 vino.snap, inode); 64 return inode; 65 } 66 67 /* 68 * get/constuct snapdir inode for a given directory 69 */ 70 struct inode *ceph_get_snapdir(struct inode *parent) 71 { 72 struct ceph_vino vino = { 73 .ino = ceph_ino(parent), 74 .snap = CEPH_SNAPDIR, 75 }; 76 struct inode *inode = ceph_get_inode(parent->i_sb, vino); 77 struct ceph_inode_info *ci = ceph_inode(inode); 78 79 BUG_ON(!S_ISDIR(parent->i_mode)); 80 if (IS_ERR(inode)) 81 return inode; 82 inode->i_mode = parent->i_mode; 83 inode->i_uid = parent->i_uid; 84 inode->i_gid = parent->i_gid; 85 inode->i_op = &ceph_dir_iops; 86 inode->i_fop = &ceph_dir_fops; 87 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ 88 ci->i_rbytes = 0; 89 return inode; 90 } 91 92 const struct inode_operations ceph_file_iops = { 93 .permission = ceph_permission, 94 .setattr = ceph_setattr, 95 .getattr = ceph_getattr, 96 .setxattr = ceph_setxattr, 97 .getxattr = ceph_getxattr, 98 .listxattr = ceph_listxattr, 99 .removexattr = ceph_removexattr, 100 .get_acl = ceph_get_acl, 101 .set_acl = ceph_set_acl, 102 }; 103 104 105 /* 106 * We use a 'frag tree' to keep track of the MDS's directory fragments 107 * for a given inode (usually there is just a single fragment). We 108 * need to know when a child frag is delegated to a new MDS, or when 109 * it is flagged as replicated, so we can direct our requests 110 * accordingly. 111 */ 112 113 /* 114 * find/create a frag in the tree 115 */ 116 static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, 117 u32 f) 118 { 119 struct rb_node **p; 120 struct rb_node *parent = NULL; 121 struct ceph_inode_frag *frag; 122 int c; 123 124 p = &ci->i_fragtree.rb_node; 125 while (*p) { 126 parent = *p; 127 frag = rb_entry(parent, struct ceph_inode_frag, node); 128 c = ceph_frag_compare(f, frag->frag); 129 if (c < 0) 130 p = &(*p)->rb_left; 131 else if (c > 0) 132 p = &(*p)->rb_right; 133 else 134 return frag; 135 } 136 137 frag = kmalloc(sizeof(*frag), GFP_NOFS); 138 if (!frag) { 139 pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " 140 "frag %x\n", &ci->vfs_inode, 141 ceph_vinop(&ci->vfs_inode), f); 142 return ERR_PTR(-ENOMEM); 143 } 144 frag->frag = f; 145 frag->split_by = 0; 146 frag->mds = -1; 147 frag->ndist = 0; 148 149 rb_link_node(&frag->node, parent, p); 150 rb_insert_color(&frag->node, &ci->i_fragtree); 151 152 dout("get_or_create_frag added %llx.%llx frag %x\n", 153 ceph_vinop(&ci->vfs_inode), f); 154 return frag; 155 } 156 157 /* 158 * find a specific frag @f 159 */ 160 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) 161 { 162 struct rb_node *n = ci->i_fragtree.rb_node; 163 164 while (n) { 165 struct ceph_inode_frag *frag = 166 rb_entry(n, struct ceph_inode_frag, node); 167 int c = ceph_frag_compare(f, frag->frag); 168 if (c < 0) 169 n = n->rb_left; 170 else if (c > 0) 171 n = n->rb_right; 172 else 173 return frag; 174 } 175 return NULL; 176 } 177 178 /* 179 * Choose frag containing the given value @v. If @pfrag is 180 * specified, copy the frag delegation info to the caller if 181 * it is present. 182 */ 183 static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 184 struct ceph_inode_frag *pfrag, int *found) 185 { 186 u32 t = ceph_frag_make(0, 0); 187 struct ceph_inode_frag *frag; 188 unsigned nway, i; 189 u32 n; 190 191 if (found) 192 *found = 0; 193 194 while (1) { 195 WARN_ON(!ceph_frag_contains_value(t, v)); 196 frag = __ceph_find_frag(ci, t); 197 if (!frag) 198 break; /* t is a leaf */ 199 if (frag->split_by == 0) { 200 if (pfrag) 201 memcpy(pfrag, frag, sizeof(*pfrag)); 202 if (found) 203 *found = 1; 204 break; 205 } 206 207 /* choose child */ 208 nway = 1 << frag->split_by; 209 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, 210 frag->split_by, nway); 211 for (i = 0; i < nway; i++) { 212 n = ceph_frag_make_child(t, frag->split_by, i); 213 if (ceph_frag_contains_value(n, v)) { 214 t = n; 215 break; 216 } 217 } 218 BUG_ON(i == nway); 219 } 220 dout("choose_frag(%x) = %x\n", v, t); 221 222 return t; 223 } 224 225 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 226 struct ceph_inode_frag *pfrag, int *found) 227 { 228 u32 ret; 229 mutex_lock(&ci->i_fragtree_mutex); 230 ret = __ceph_choose_frag(ci, v, pfrag, found); 231 mutex_unlock(&ci->i_fragtree_mutex); 232 return ret; 233 } 234 235 /* 236 * Process dirfrag (delegation) info from the mds. Include leaf 237 * fragment in tree ONLY if ndist > 0. Otherwise, only 238 * branches/splits are included in i_fragtree) 239 */ 240 static int ceph_fill_dirfrag(struct inode *inode, 241 struct ceph_mds_reply_dirfrag *dirinfo) 242 { 243 struct ceph_inode_info *ci = ceph_inode(inode); 244 struct ceph_inode_frag *frag; 245 u32 id = le32_to_cpu(dirinfo->frag); 246 int mds = le32_to_cpu(dirinfo->auth); 247 int ndist = le32_to_cpu(dirinfo->ndist); 248 int diri_auth = -1; 249 int i; 250 int err = 0; 251 252 spin_lock(&ci->i_ceph_lock); 253 if (ci->i_auth_cap) 254 diri_auth = ci->i_auth_cap->mds; 255 spin_unlock(&ci->i_ceph_lock); 256 257 mutex_lock(&ci->i_fragtree_mutex); 258 if (ndist == 0 && mds == diri_auth) { 259 /* no delegation info needed. */ 260 frag = __ceph_find_frag(ci, id); 261 if (!frag) 262 goto out; 263 if (frag->split_by == 0) { 264 /* tree leaf, remove */ 265 dout("fill_dirfrag removed %llx.%llx frag %x" 266 " (no ref)\n", ceph_vinop(inode), id); 267 rb_erase(&frag->node, &ci->i_fragtree); 268 kfree(frag); 269 } else { 270 /* tree branch, keep and clear */ 271 dout("fill_dirfrag cleared %llx.%llx frag %x" 272 " referral\n", ceph_vinop(inode), id); 273 frag->mds = -1; 274 frag->ndist = 0; 275 } 276 goto out; 277 } 278 279 280 /* find/add this frag to store mds delegation info */ 281 frag = __get_or_create_frag(ci, id); 282 if (IS_ERR(frag)) { 283 /* this is not the end of the world; we can continue 284 with bad/inaccurate delegation info */ 285 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", 286 ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); 287 err = -ENOMEM; 288 goto out; 289 } 290 291 frag->mds = mds; 292 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); 293 for (i = 0; i < frag->ndist; i++) 294 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); 295 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", 296 ceph_vinop(inode), frag->frag, frag->ndist); 297 298 out: 299 mutex_unlock(&ci->i_fragtree_mutex); 300 return err; 301 } 302 303 static int ceph_fill_fragtree(struct inode *inode, 304 struct ceph_frag_tree_head *fragtree, 305 struct ceph_mds_reply_dirfrag *dirinfo) 306 { 307 struct ceph_inode_info *ci = ceph_inode(inode); 308 struct ceph_inode_frag *frag; 309 struct rb_node *rb_node; 310 int i; 311 u32 id, nsplits; 312 bool update = false; 313 314 mutex_lock(&ci->i_fragtree_mutex); 315 nsplits = le32_to_cpu(fragtree->nsplits); 316 if (nsplits) { 317 i = prandom_u32() % nsplits; 318 id = le32_to_cpu(fragtree->splits[i].frag); 319 if (!__ceph_find_frag(ci, id)) 320 update = true; 321 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { 322 rb_node = rb_first(&ci->i_fragtree); 323 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 324 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) 325 update = true; 326 } 327 if (!update && dirinfo) { 328 id = le32_to_cpu(dirinfo->frag); 329 if (id != __ceph_choose_frag(ci, id, NULL, NULL)) 330 update = true; 331 } 332 if (!update) 333 goto out_unlock; 334 335 dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode)); 336 rb_node = rb_first(&ci->i_fragtree); 337 for (i = 0; i < nsplits; i++) { 338 id = le32_to_cpu(fragtree->splits[i].frag); 339 frag = NULL; 340 while (rb_node) { 341 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 342 if (ceph_frag_compare(frag->frag, id) >= 0) { 343 if (frag->frag != id) 344 frag = NULL; 345 else 346 rb_node = rb_next(rb_node); 347 break; 348 } 349 rb_node = rb_next(rb_node); 350 rb_erase(&frag->node, &ci->i_fragtree); 351 kfree(frag); 352 frag = NULL; 353 } 354 if (!frag) { 355 frag = __get_or_create_frag(ci, id); 356 if (IS_ERR(frag)) 357 continue; 358 } 359 frag->split_by = le32_to_cpu(fragtree->splits[i].by); 360 dout(" frag %x split by %d\n", frag->frag, frag->split_by); 361 } 362 while (rb_node) { 363 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 364 rb_node = rb_next(rb_node); 365 rb_erase(&frag->node, &ci->i_fragtree); 366 kfree(frag); 367 } 368 out_unlock: 369 mutex_unlock(&ci->i_fragtree_mutex); 370 return 0; 371 } 372 373 /* 374 * initialize a newly allocated inode. 375 */ 376 struct inode *ceph_alloc_inode(struct super_block *sb) 377 { 378 struct ceph_inode_info *ci; 379 int i; 380 381 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); 382 if (!ci) 383 return NULL; 384 385 dout("alloc_inode %p\n", &ci->vfs_inode); 386 387 spin_lock_init(&ci->i_ceph_lock); 388 389 ci->i_version = 0; 390 ci->i_time_warp_seq = 0; 391 ci->i_ceph_flags = 0; 392 ci->i_ordered_count = 0; 393 atomic_set(&ci->i_release_count, 1); 394 atomic_set(&ci->i_complete_count, 0); 395 ci->i_symlink = NULL; 396 397 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); 398 399 ci->i_fragtree = RB_ROOT; 400 mutex_init(&ci->i_fragtree_mutex); 401 402 ci->i_xattrs.blob = NULL; 403 ci->i_xattrs.prealloc_blob = NULL; 404 ci->i_xattrs.dirty = false; 405 ci->i_xattrs.index = RB_ROOT; 406 ci->i_xattrs.count = 0; 407 ci->i_xattrs.names_size = 0; 408 ci->i_xattrs.vals_size = 0; 409 ci->i_xattrs.version = 0; 410 ci->i_xattrs.index_version = 0; 411 412 ci->i_caps = RB_ROOT; 413 ci->i_auth_cap = NULL; 414 ci->i_dirty_caps = 0; 415 ci->i_flushing_caps = 0; 416 INIT_LIST_HEAD(&ci->i_dirty_item); 417 INIT_LIST_HEAD(&ci->i_flushing_item); 418 ci->i_cap_flush_seq = 0; 419 ci->i_cap_flush_last_tid = 0; 420 memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid)); 421 init_waitqueue_head(&ci->i_cap_wq); 422 ci->i_hold_caps_min = 0; 423 ci->i_hold_caps_max = 0; 424 INIT_LIST_HEAD(&ci->i_cap_delay_list); 425 INIT_LIST_HEAD(&ci->i_cap_snaps); 426 ci->i_head_snapc = NULL; 427 ci->i_snap_caps = 0; 428 429 for (i = 0; i < CEPH_FILE_MODE_NUM; i++) 430 ci->i_nr_by_mode[i] = 0; 431 432 mutex_init(&ci->i_truncate_mutex); 433 ci->i_truncate_seq = 0; 434 ci->i_truncate_size = 0; 435 ci->i_truncate_pending = 0; 436 437 ci->i_max_size = 0; 438 ci->i_reported_size = 0; 439 ci->i_wanted_max_size = 0; 440 ci->i_requested_max_size = 0; 441 442 ci->i_pin_ref = 0; 443 ci->i_rd_ref = 0; 444 ci->i_rdcache_ref = 0; 445 ci->i_wr_ref = 0; 446 ci->i_wb_ref = 0; 447 ci->i_wrbuffer_ref = 0; 448 ci->i_wrbuffer_ref_head = 0; 449 ci->i_shared_gen = 0; 450 ci->i_rdcache_gen = 0; 451 ci->i_rdcache_revoking = 0; 452 453 INIT_LIST_HEAD(&ci->i_unsafe_writes); 454 INIT_LIST_HEAD(&ci->i_unsafe_dirops); 455 spin_lock_init(&ci->i_unsafe_lock); 456 457 ci->i_snap_realm = NULL; 458 INIT_LIST_HEAD(&ci->i_snap_realm_item); 459 INIT_LIST_HEAD(&ci->i_snap_flush_item); 460 461 INIT_WORK(&ci->i_wb_work, ceph_writeback_work); 462 INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); 463 464 INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); 465 466 ceph_fscache_inode_init(ci); 467 468 return &ci->vfs_inode; 469 } 470 471 static void ceph_i_callback(struct rcu_head *head) 472 { 473 struct inode *inode = container_of(head, struct inode, i_rcu); 474 struct ceph_inode_info *ci = ceph_inode(inode); 475 476 kmem_cache_free(ceph_inode_cachep, ci); 477 } 478 479 void ceph_destroy_inode(struct inode *inode) 480 { 481 struct ceph_inode_info *ci = ceph_inode(inode); 482 struct ceph_inode_frag *frag; 483 struct rb_node *n; 484 485 dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); 486 487 ceph_fscache_unregister_inode_cookie(ci); 488 489 ceph_queue_caps_release(inode); 490 491 /* 492 * we may still have a snap_realm reference if there are stray 493 * caps in i_snap_caps. 494 */ 495 if (ci->i_snap_realm) { 496 struct ceph_mds_client *mdsc = 497 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; 498 struct ceph_snap_realm *realm = ci->i_snap_realm; 499 500 dout(" dropping residual ref to snap realm %p\n", realm); 501 spin_lock(&realm->inodes_with_caps_lock); 502 list_del_init(&ci->i_snap_realm_item); 503 spin_unlock(&realm->inodes_with_caps_lock); 504 ceph_put_snap_realm(mdsc, realm); 505 } 506 507 kfree(ci->i_symlink); 508 while ((n = rb_first(&ci->i_fragtree)) != NULL) { 509 frag = rb_entry(n, struct ceph_inode_frag, node); 510 rb_erase(n, &ci->i_fragtree); 511 kfree(frag); 512 } 513 514 __ceph_destroy_xattrs(ci); 515 if (ci->i_xattrs.blob) 516 ceph_buffer_put(ci->i_xattrs.blob); 517 if (ci->i_xattrs.prealloc_blob) 518 ceph_buffer_put(ci->i_xattrs.prealloc_blob); 519 520 call_rcu(&inode->i_rcu, ceph_i_callback); 521 } 522 523 int ceph_drop_inode(struct inode *inode) 524 { 525 /* 526 * Positve dentry and corresponding inode are always accompanied 527 * in MDS reply. So no need to keep inode in the cache after 528 * dropping all its aliases. 529 */ 530 return 1; 531 } 532 533 /* 534 * Helpers to fill in size, ctime, mtime, and atime. We have to be 535 * careful because either the client or MDS may have more up to date 536 * info, depending on which capabilities are held, and whether 537 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime 538 * and size are monotonically increasing, except when utimes() or 539 * truncate() increments the corresponding _seq values.) 540 */ 541 int ceph_fill_file_size(struct inode *inode, int issued, 542 u32 truncate_seq, u64 truncate_size, u64 size) 543 { 544 struct ceph_inode_info *ci = ceph_inode(inode); 545 int queue_trunc = 0; 546 547 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || 548 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { 549 dout("size %lld -> %llu\n", inode->i_size, size); 550 inode->i_size = size; 551 inode->i_blocks = (size + (1<<9) - 1) >> 9; 552 ci->i_reported_size = size; 553 if (truncate_seq != ci->i_truncate_seq) { 554 dout("truncate_seq %u -> %u\n", 555 ci->i_truncate_seq, truncate_seq); 556 ci->i_truncate_seq = truncate_seq; 557 558 /* the MDS should have revoked these caps */ 559 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL | 560 CEPH_CAP_FILE_RD | 561 CEPH_CAP_FILE_WR | 562 CEPH_CAP_FILE_LAZYIO)); 563 /* 564 * If we hold relevant caps, or in the case where we're 565 * not the only client referencing this file and we 566 * don't hold those caps, then we need to check whether 567 * the file is either opened or mmaped 568 */ 569 if ((issued & (CEPH_CAP_FILE_CACHE| 570 CEPH_CAP_FILE_BUFFER)) || 571 mapping_mapped(inode->i_mapping) || 572 __ceph_caps_file_wanted(ci)) { 573 ci->i_truncate_pending++; 574 queue_trunc = 1; 575 } 576 } 577 } 578 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && 579 ci->i_truncate_size != truncate_size) { 580 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, 581 truncate_size); 582 ci->i_truncate_size = truncate_size; 583 } 584 585 if (queue_trunc) 586 ceph_fscache_invalidate(inode); 587 588 return queue_trunc; 589 } 590 591 void ceph_fill_file_time(struct inode *inode, int issued, 592 u64 time_warp_seq, struct timespec *ctime, 593 struct timespec *mtime, struct timespec *atime) 594 { 595 struct ceph_inode_info *ci = ceph_inode(inode); 596 int warn = 0; 597 598 if (issued & (CEPH_CAP_FILE_EXCL| 599 CEPH_CAP_FILE_WR| 600 CEPH_CAP_FILE_BUFFER| 601 CEPH_CAP_AUTH_EXCL| 602 CEPH_CAP_XATTR_EXCL)) { 603 if (timespec_compare(ctime, &inode->i_ctime) > 0) { 604 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", 605 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 606 ctime->tv_sec, ctime->tv_nsec); 607 inode->i_ctime = *ctime; 608 } 609 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { 610 /* the MDS did a utimes() */ 611 dout("mtime %ld.%09ld -> %ld.%09ld " 612 "tw %d -> %d\n", 613 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 614 mtime->tv_sec, mtime->tv_nsec, 615 ci->i_time_warp_seq, (int)time_warp_seq); 616 617 inode->i_mtime = *mtime; 618 inode->i_atime = *atime; 619 ci->i_time_warp_seq = time_warp_seq; 620 } else if (time_warp_seq == ci->i_time_warp_seq) { 621 /* nobody did utimes(); take the max */ 622 if (timespec_compare(mtime, &inode->i_mtime) > 0) { 623 dout("mtime %ld.%09ld -> %ld.%09ld inc\n", 624 inode->i_mtime.tv_sec, 625 inode->i_mtime.tv_nsec, 626 mtime->tv_sec, mtime->tv_nsec); 627 inode->i_mtime = *mtime; 628 } 629 if (timespec_compare(atime, &inode->i_atime) > 0) { 630 dout("atime %ld.%09ld -> %ld.%09ld inc\n", 631 inode->i_atime.tv_sec, 632 inode->i_atime.tv_nsec, 633 atime->tv_sec, atime->tv_nsec); 634 inode->i_atime = *atime; 635 } 636 } else if (issued & CEPH_CAP_FILE_EXCL) { 637 /* we did a utimes(); ignore mds values */ 638 } else { 639 warn = 1; 640 } 641 } else { 642 /* we have no write|excl caps; whatever the MDS says is true */ 643 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { 644 inode->i_ctime = *ctime; 645 inode->i_mtime = *mtime; 646 inode->i_atime = *atime; 647 ci->i_time_warp_seq = time_warp_seq; 648 } else { 649 warn = 1; 650 } 651 } 652 if (warn) /* time_warp_seq shouldn't go backwards */ 653 dout("%p mds time_warp_seq %llu < %u\n", 654 inode, time_warp_seq, ci->i_time_warp_seq); 655 } 656 657 /* 658 * Populate an inode based on info from mds. May be called on new or 659 * existing inodes. 660 */ 661 static int fill_inode(struct inode *inode, 662 struct ceph_mds_reply_info_in *iinfo, 663 struct ceph_mds_reply_dirfrag *dirinfo, 664 struct ceph_mds_session *session, 665 unsigned long ttl_from, int cap_fmode, 666 struct ceph_cap_reservation *caps_reservation) 667 { 668 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; 669 struct ceph_mds_reply_inode *info = iinfo->in; 670 struct ceph_inode_info *ci = ceph_inode(inode); 671 int issued = 0, implemented, new_issued; 672 struct timespec mtime, atime, ctime; 673 struct ceph_buffer *xattr_blob = NULL; 674 struct ceph_cap *new_cap = NULL; 675 int err = 0; 676 bool wake = false; 677 bool queue_trunc = false; 678 bool new_version = false; 679 680 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", 681 inode, ceph_vinop(inode), le64_to_cpu(info->version), 682 ci->i_version); 683 684 /* prealloc new cap struct */ 685 if (info->cap.caps && ceph_snap(inode) == CEPH_NOSNAP) 686 new_cap = ceph_get_cap(mdsc, caps_reservation); 687 688 /* 689 * prealloc xattr data, if it looks like we'll need it. only 690 * if len > 4 (meaning there are actually xattrs; the first 4 691 * bytes are the xattr count). 692 */ 693 if (iinfo->xattr_len > 4) { 694 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); 695 if (!xattr_blob) 696 pr_err("fill_inode ENOMEM xattr blob %d bytes\n", 697 iinfo->xattr_len); 698 } 699 700 spin_lock(&ci->i_ceph_lock); 701 702 /* 703 * provided version will be odd if inode value is projected, 704 * even if stable. skip the update if we have newer stable 705 * info (ours>=theirs, e.g. due to racing mds replies), unless 706 * we are getting projected (unstable) info (in which case the 707 * version is odd, and we want ours>theirs). 708 * us them 709 * 2 2 skip 710 * 3 2 skip 711 * 3 3 update 712 */ 713 if (ci->i_version == 0 || 714 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 715 le64_to_cpu(info->version) > (ci->i_version & ~1))) 716 new_version = true; 717 718 issued = __ceph_caps_issued(ci, &implemented); 719 issued |= implemented | __ceph_caps_dirty(ci); 720 new_issued = ~issued & le32_to_cpu(info->cap.caps); 721 722 /* update inode */ 723 ci->i_version = le64_to_cpu(info->version); 724 inode->i_version++; 725 inode->i_rdev = le32_to_cpu(info->rdev); 726 inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; 727 728 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && 729 (issued & CEPH_CAP_AUTH_EXCL) == 0) { 730 inode->i_mode = le32_to_cpu(info->mode); 731 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); 732 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); 733 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, 734 from_kuid(&init_user_ns, inode->i_uid), 735 from_kgid(&init_user_ns, inode->i_gid)); 736 } 737 738 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && 739 (issued & CEPH_CAP_LINK_EXCL) == 0) 740 set_nlink(inode, le32_to_cpu(info->nlink)); 741 742 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { 743 /* be careful with mtime, atime, size */ 744 ceph_decode_timespec(&atime, &info->atime); 745 ceph_decode_timespec(&mtime, &info->mtime); 746 ceph_decode_timespec(&ctime, &info->ctime); 747 ceph_fill_file_time(inode, issued, 748 le32_to_cpu(info->time_warp_seq), 749 &ctime, &mtime, &atime); 750 } 751 752 if (new_version || 753 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { 754 ci->i_layout = info->layout; 755 queue_trunc = ceph_fill_file_size(inode, issued, 756 le32_to_cpu(info->truncate_seq), 757 le64_to_cpu(info->truncate_size), 758 le64_to_cpu(info->size)); 759 /* only update max_size on auth cap */ 760 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 761 ci->i_max_size != le64_to_cpu(info->max_size)) { 762 dout("max_size %lld -> %llu\n", ci->i_max_size, 763 le64_to_cpu(info->max_size)); 764 ci->i_max_size = le64_to_cpu(info->max_size); 765 } 766 } 767 768 /* xattrs */ 769 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ 770 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && 771 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { 772 if (ci->i_xattrs.blob) 773 ceph_buffer_put(ci->i_xattrs.blob); 774 ci->i_xattrs.blob = xattr_blob; 775 if (xattr_blob) 776 memcpy(ci->i_xattrs.blob->vec.iov_base, 777 iinfo->xattr_data, iinfo->xattr_len); 778 ci->i_xattrs.version = le64_to_cpu(info->xattr_version); 779 ceph_forget_all_cached_acls(inode); 780 xattr_blob = NULL; 781 } 782 783 inode->i_mapping->a_ops = &ceph_aops; 784 inode->i_mapping->backing_dev_info = 785 &ceph_sb_to_client(inode->i_sb)->backing_dev_info; 786 787 switch (inode->i_mode & S_IFMT) { 788 case S_IFIFO: 789 case S_IFBLK: 790 case S_IFCHR: 791 case S_IFSOCK: 792 init_special_inode(inode, inode->i_mode, inode->i_rdev); 793 inode->i_op = &ceph_file_iops; 794 break; 795 case S_IFREG: 796 inode->i_op = &ceph_file_iops; 797 inode->i_fop = &ceph_file_fops; 798 break; 799 case S_IFLNK: 800 inode->i_op = &ceph_symlink_iops; 801 if (!ci->i_symlink) { 802 u32 symlen = iinfo->symlink_len; 803 char *sym; 804 805 spin_unlock(&ci->i_ceph_lock); 806 807 err = -EINVAL; 808 if (WARN_ON(symlen != inode->i_size)) 809 goto out; 810 811 err = -ENOMEM; 812 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); 813 if (!sym) 814 goto out; 815 816 spin_lock(&ci->i_ceph_lock); 817 if (!ci->i_symlink) 818 ci->i_symlink = sym; 819 else 820 kfree(sym); /* lost a race */ 821 } 822 break; 823 case S_IFDIR: 824 inode->i_op = &ceph_dir_iops; 825 inode->i_fop = &ceph_dir_fops; 826 827 ci->i_dir_layout = iinfo->dir_layout; 828 829 ci->i_files = le64_to_cpu(info->files); 830 ci->i_subdirs = le64_to_cpu(info->subdirs); 831 ci->i_rbytes = le64_to_cpu(info->rbytes); 832 ci->i_rfiles = le64_to_cpu(info->rfiles); 833 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); 834 ceph_decode_timespec(&ci->i_rctime, &info->rctime); 835 break; 836 default: 837 pr_err("fill_inode %llx.%llx BAD mode 0%o\n", 838 ceph_vinop(inode), inode->i_mode); 839 } 840 841 /* set dir completion flag? */ 842 if (S_ISDIR(inode->i_mode) && 843 ci->i_files == 0 && ci->i_subdirs == 0 && 844 ceph_snap(inode) == CEPH_NOSNAP && 845 (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) && 846 (issued & CEPH_CAP_FILE_EXCL) == 0 && 847 !__ceph_dir_is_complete(ci)) { 848 dout(" marking %p complete (empty)\n", inode); 849 __ceph_dir_set_complete(ci, atomic_read(&ci->i_release_count), 850 ci->i_ordered_count); 851 } 852 853 /* were we issued a capability? */ 854 if (info->cap.caps) { 855 if (ceph_snap(inode) == CEPH_NOSNAP) { 856 ceph_add_cap(inode, session, 857 le64_to_cpu(info->cap.cap_id), 858 cap_fmode, 859 le32_to_cpu(info->cap.caps), 860 le32_to_cpu(info->cap.wanted), 861 le32_to_cpu(info->cap.seq), 862 le32_to_cpu(info->cap.mseq), 863 le64_to_cpu(info->cap.realm), 864 info->cap.flags, &new_cap); 865 wake = true; 866 } else { 867 dout(" %p got snap_caps %s\n", inode, 868 ceph_cap_string(le32_to_cpu(info->cap.caps))); 869 ci->i_snap_caps |= le32_to_cpu(info->cap.caps); 870 if (cap_fmode >= 0) 871 __ceph_get_fmode(ci, cap_fmode); 872 } 873 } else if (cap_fmode >= 0) { 874 pr_warn("mds issued no caps on %llx.%llx\n", 875 ceph_vinop(inode)); 876 __ceph_get_fmode(ci, cap_fmode); 877 } 878 spin_unlock(&ci->i_ceph_lock); 879 880 if (wake) 881 wake_up_all(&ci->i_cap_wq); 882 883 /* queue truncate if we saw i_size decrease */ 884 if (queue_trunc) 885 ceph_queue_vmtruncate(inode); 886 887 /* populate frag tree */ 888 if (S_ISDIR(inode->i_mode)) 889 ceph_fill_fragtree(inode, &info->fragtree, dirinfo); 890 891 /* update delegation info? */ 892 if (dirinfo) 893 ceph_fill_dirfrag(inode, dirinfo); 894 895 err = 0; 896 out: 897 if (new_cap) 898 ceph_put_cap(mdsc, new_cap); 899 if (xattr_blob) 900 ceph_buffer_put(xattr_blob); 901 return err; 902 } 903 904 /* 905 * caller should hold session s_mutex. 906 */ 907 static void update_dentry_lease(struct dentry *dentry, 908 struct ceph_mds_reply_lease *lease, 909 struct ceph_mds_session *session, 910 unsigned long from_time) 911 { 912 struct ceph_dentry_info *di = ceph_dentry(dentry); 913 long unsigned duration = le32_to_cpu(lease->duration_ms); 914 long unsigned ttl = from_time + (duration * HZ) / 1000; 915 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; 916 struct inode *dir; 917 918 /* only track leases on regular dentries */ 919 if (dentry->d_op != &ceph_dentry_ops) 920 return; 921 922 spin_lock(&dentry->d_lock); 923 dout("update_dentry_lease %p duration %lu ms ttl %lu\n", 924 dentry, duration, ttl); 925 926 /* make lease_rdcache_gen match directory */ 927 dir = dentry->d_parent->d_inode; 928 di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; 929 930 if (duration == 0) 931 goto out_unlock; 932 933 if (di->lease_gen == session->s_cap_gen && 934 time_before(ttl, dentry->d_time)) 935 goto out_unlock; /* we already have a newer lease. */ 936 937 if (di->lease_session && di->lease_session != session) 938 goto out_unlock; 939 940 ceph_dentry_lru_touch(dentry); 941 942 if (!di->lease_session) 943 di->lease_session = ceph_get_mds_session(session); 944 di->lease_gen = session->s_cap_gen; 945 di->lease_seq = le32_to_cpu(lease->seq); 946 di->lease_renew_after = half_ttl; 947 di->lease_renew_from = 0; 948 dentry->d_time = ttl; 949 out_unlock: 950 spin_unlock(&dentry->d_lock); 951 return; 952 } 953 954 /* 955 * splice a dentry to an inode. 956 * caller must hold directory i_mutex for this to be safe. 957 * 958 * we will only rehash the resulting dentry if @prehash is 959 * true; @prehash will be set to false (for the benefit of 960 * the caller) if we fail. 961 */ 962 static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, 963 bool *prehash) 964 { 965 struct dentry *realdn; 966 967 BUG_ON(dn->d_inode); 968 969 /* dn must be unhashed */ 970 if (!d_unhashed(dn)) 971 d_drop(dn); 972 realdn = d_materialise_unique(dn, in); 973 if (IS_ERR(realdn)) { 974 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", 975 PTR_ERR(realdn), dn, in, ceph_vinop(in)); 976 if (prehash) 977 *prehash = false; /* don't rehash on error */ 978 dn = realdn; /* note realdn contains the error */ 979 goto out; 980 } else if (realdn) { 981 dout("dn %p (%d) spliced with %p (%d) " 982 "inode %p ino %llx.%llx\n", 983 dn, d_count(dn), 984 realdn, d_count(realdn), 985 realdn->d_inode, ceph_vinop(realdn->d_inode)); 986 dput(dn); 987 dn = realdn; 988 } else { 989 BUG_ON(!ceph_dentry(dn)); 990 dout("dn %p attached to %p ino %llx.%llx\n", 991 dn, dn->d_inode, ceph_vinop(dn->d_inode)); 992 } 993 if ((!prehash || *prehash) && d_unhashed(dn)) 994 d_rehash(dn); 995 out: 996 return dn; 997 } 998 999 /* 1000 * Incorporate results into the local cache. This is either just 1001 * one inode, or a directory, dentry, and possibly linked-to inode (e.g., 1002 * after a lookup). 1003 * 1004 * A reply may contain 1005 * a directory inode along with a dentry. 1006 * and/or a target inode 1007 * 1008 * Called with snap_rwsem (read). 1009 */ 1010 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, 1011 struct ceph_mds_session *session) 1012 { 1013 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1014 struct inode *in = NULL; 1015 struct ceph_vino vino; 1016 struct ceph_fs_client *fsc = ceph_sb_to_client(sb); 1017 int err = 0; 1018 1019 dout("fill_trace %p is_dentry %d is_target %d\n", req, 1020 rinfo->head->is_dentry, rinfo->head->is_target); 1021 1022 #if 0 1023 /* 1024 * Debugging hook: 1025 * 1026 * If we resend completed ops to a recovering mds, we get no 1027 * trace. Since that is very rare, pretend this is the case 1028 * to ensure the 'no trace' handlers in the callers behave. 1029 * 1030 * Fill in inodes unconditionally to avoid breaking cap 1031 * invariants. 1032 */ 1033 if (rinfo->head->op & CEPH_MDS_OP_WRITE) { 1034 pr_info("fill_trace faking empty trace on %lld %s\n", 1035 req->r_tid, ceph_mds_op_name(rinfo->head->op)); 1036 if (rinfo->head->is_dentry) { 1037 rinfo->head->is_dentry = 0; 1038 err = fill_inode(req->r_locked_dir, 1039 &rinfo->diri, rinfo->dirfrag, 1040 session, req->r_request_started, -1); 1041 } 1042 if (rinfo->head->is_target) { 1043 rinfo->head->is_target = 0; 1044 ininfo = rinfo->targeti.in; 1045 vino.ino = le64_to_cpu(ininfo->ino); 1046 vino.snap = le64_to_cpu(ininfo->snapid); 1047 in = ceph_get_inode(sb, vino); 1048 err = fill_inode(in, &rinfo->targeti, NULL, 1049 session, req->r_request_started, 1050 req->r_fmode); 1051 iput(in); 1052 } 1053 } 1054 #endif 1055 1056 if (!rinfo->head->is_target && !rinfo->head->is_dentry) { 1057 dout("fill_trace reply is empty!\n"); 1058 if (rinfo->head->result == 0 && req->r_locked_dir) 1059 ceph_invalidate_dir_request(req); 1060 return 0; 1061 } 1062 1063 if (rinfo->head->is_dentry) { 1064 struct inode *dir = req->r_locked_dir; 1065 1066 if (dir) { 1067 err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, 1068 session, req->r_request_started, -1, 1069 &req->r_caps_reservation); 1070 if (err < 0) 1071 goto done; 1072 } else { 1073 WARN_ON_ONCE(1); 1074 } 1075 1076 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) { 1077 struct qstr dname; 1078 struct dentry *dn, *parent; 1079 1080 BUG_ON(!rinfo->head->is_target); 1081 BUG_ON(req->r_dentry); 1082 1083 parent = d_find_any_alias(dir); 1084 BUG_ON(!parent); 1085 1086 dname.name = rinfo->dname; 1087 dname.len = rinfo->dname_len; 1088 dname.hash = full_name_hash(dname.name, dname.len); 1089 vino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1090 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1091 retry_lookup: 1092 dn = d_lookup(parent, &dname); 1093 dout("d_lookup on parent=%p name=%.*s got %p\n", 1094 parent, dname.len, dname.name, dn); 1095 1096 if (!dn) { 1097 dn = d_alloc(parent, &dname); 1098 dout("d_alloc %p '%.*s' = %p\n", parent, 1099 dname.len, dname.name, dn); 1100 if (dn == NULL) { 1101 dput(parent); 1102 err = -ENOMEM; 1103 goto done; 1104 } 1105 err = ceph_init_dentry(dn); 1106 if (err < 0) { 1107 dput(dn); 1108 dput(parent); 1109 goto done; 1110 } 1111 } else if (dn->d_inode && 1112 (ceph_ino(dn->d_inode) != vino.ino || 1113 ceph_snap(dn->d_inode) != vino.snap)) { 1114 dout(" dn %p points to wrong inode %p\n", 1115 dn, dn->d_inode); 1116 d_delete(dn); 1117 dput(dn); 1118 goto retry_lookup; 1119 } 1120 1121 req->r_dentry = dn; 1122 dput(parent); 1123 } 1124 } 1125 1126 if (rinfo->head->is_target) { 1127 vino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1128 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1129 1130 in = ceph_get_inode(sb, vino); 1131 if (IS_ERR(in)) { 1132 err = PTR_ERR(in); 1133 goto done; 1134 } 1135 req->r_target_inode = in; 1136 1137 err = fill_inode(in, &rinfo->targeti, NULL, 1138 session, req->r_request_started, 1139 (!req->r_aborted && rinfo->head->result == 0) ? 1140 req->r_fmode : -1, 1141 &req->r_caps_reservation); 1142 if (err < 0) { 1143 pr_err("fill_inode badness %p %llx.%llx\n", 1144 in, ceph_vinop(in)); 1145 goto done; 1146 } 1147 } 1148 1149 /* 1150 * ignore null lease/binding on snapdir ENOENT, or else we 1151 * will have trouble splicing in the virtual snapdir later 1152 */ 1153 if (rinfo->head->is_dentry && !req->r_aborted && 1154 req->r_locked_dir && 1155 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, 1156 fsc->mount_options->snapdir_name, 1157 req->r_dentry->d_name.len))) { 1158 /* 1159 * lookup link rename : null -> possibly existing inode 1160 * mknod symlink mkdir : null -> new inode 1161 * unlink : linked -> null 1162 */ 1163 struct inode *dir = req->r_locked_dir; 1164 struct dentry *dn = req->r_dentry; 1165 bool have_dir_cap, have_lease; 1166 1167 BUG_ON(!dn); 1168 BUG_ON(!dir); 1169 BUG_ON(dn->d_parent->d_inode != dir); 1170 BUG_ON(ceph_ino(dir) != 1171 le64_to_cpu(rinfo->diri.in->ino)); 1172 BUG_ON(ceph_snap(dir) != 1173 le64_to_cpu(rinfo->diri.in->snapid)); 1174 1175 /* do we have a lease on the whole dir? */ 1176 have_dir_cap = 1177 (le32_to_cpu(rinfo->diri.in->cap.caps) & 1178 CEPH_CAP_FILE_SHARED); 1179 1180 /* do we have a dn lease? */ 1181 have_lease = have_dir_cap || 1182 le32_to_cpu(rinfo->dlease->duration_ms); 1183 if (!have_lease) 1184 dout("fill_trace no dentry lease or dir cap\n"); 1185 1186 /* rename? */ 1187 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { 1188 struct inode *olddir = req->r_old_dentry_dir; 1189 BUG_ON(!olddir); 1190 1191 dout(" src %p '%.*s' dst %p '%.*s'\n", 1192 req->r_old_dentry, 1193 req->r_old_dentry->d_name.len, 1194 req->r_old_dentry->d_name.name, 1195 dn, dn->d_name.len, dn->d_name.name); 1196 dout("fill_trace doing d_move %p -> %p\n", 1197 req->r_old_dentry, dn); 1198 1199 d_move(req->r_old_dentry, dn); 1200 dout(" src %p '%.*s' dst %p '%.*s'\n", 1201 req->r_old_dentry, 1202 req->r_old_dentry->d_name.len, 1203 req->r_old_dentry->d_name.name, 1204 dn, dn->d_name.len, dn->d_name.name); 1205 1206 /* ensure target dentry is invalidated, despite 1207 rehashing bug in vfs_rename_dir */ 1208 ceph_invalidate_dentry_lease(dn); 1209 1210 /* d_move screws up sibling dentries' offsets */ 1211 ceph_dir_clear_ordered(dir); 1212 ceph_dir_clear_ordered(olddir); 1213 1214 dout("dn %p gets new offset %lld\n", req->r_old_dentry, 1215 ceph_dentry(req->r_old_dentry)->offset); 1216 1217 dn = req->r_old_dentry; /* use old_dentry */ 1218 } 1219 1220 /* null dentry? */ 1221 if (!rinfo->head->is_target) { 1222 dout("fill_trace null dentry\n"); 1223 if (dn->d_inode) { 1224 ceph_dir_clear_ordered(dir); 1225 dout("d_delete %p\n", dn); 1226 d_delete(dn); 1227 } else { 1228 dout("d_instantiate %p NULL\n", dn); 1229 d_instantiate(dn, NULL); 1230 if (have_lease && d_unhashed(dn)) 1231 d_rehash(dn); 1232 update_dentry_lease(dn, rinfo->dlease, 1233 session, 1234 req->r_request_started); 1235 } 1236 goto done; 1237 } 1238 1239 /* attach proper inode */ 1240 if (!dn->d_inode) { 1241 ceph_dir_clear_ordered(dir); 1242 ihold(in); 1243 dn = splice_dentry(dn, in, &have_lease); 1244 if (IS_ERR(dn)) { 1245 err = PTR_ERR(dn); 1246 goto done; 1247 } 1248 req->r_dentry = dn; /* may have spliced */ 1249 } else if (dn->d_inode && dn->d_inode != in) { 1250 dout(" %p links to %p %llx.%llx, not %llx.%llx\n", 1251 dn, dn->d_inode, ceph_vinop(dn->d_inode), 1252 ceph_vinop(in)); 1253 have_lease = false; 1254 } 1255 1256 if (have_lease) 1257 update_dentry_lease(dn, rinfo->dlease, session, 1258 req->r_request_started); 1259 dout(" final dn %p\n", dn); 1260 } else if (!req->r_aborted && 1261 (req->r_op == CEPH_MDS_OP_LOOKUPSNAP || 1262 req->r_op == CEPH_MDS_OP_MKSNAP)) { 1263 struct dentry *dn = req->r_dentry; 1264 struct inode *dir = req->r_locked_dir; 1265 1266 /* fill out a snapdir LOOKUPSNAP dentry */ 1267 BUG_ON(!dn); 1268 BUG_ON(!dir); 1269 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); 1270 dout(" linking snapped dir %p to dn %p\n", in, dn); 1271 ceph_dir_clear_ordered(dir); 1272 ihold(in); 1273 dn = splice_dentry(dn, in, NULL); 1274 if (IS_ERR(dn)) { 1275 err = PTR_ERR(dn); 1276 goto done; 1277 } 1278 req->r_dentry = dn; /* may have spliced */ 1279 } 1280 done: 1281 dout("fill_trace done err=%d\n", err); 1282 return err; 1283 } 1284 1285 /* 1286 * Prepopulate our cache with readdir results, leases, etc. 1287 */ 1288 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, 1289 struct ceph_mds_session *session) 1290 { 1291 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1292 int i, err = 0; 1293 1294 for (i = 0; i < rinfo->dir_nr; i++) { 1295 struct ceph_vino vino; 1296 struct inode *in; 1297 int rc; 1298 1299 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); 1300 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); 1301 1302 in = ceph_get_inode(req->r_dentry->d_sb, vino); 1303 if (IS_ERR(in)) { 1304 err = PTR_ERR(in); 1305 dout("new_inode badness got %d\n", err); 1306 continue; 1307 } 1308 rc = fill_inode(in, &rinfo->dir_in[i], NULL, session, 1309 req->r_request_started, -1, 1310 &req->r_caps_reservation); 1311 if (rc < 0) { 1312 pr_err("fill_inode badness on %p got %d\n", in, rc); 1313 err = rc; 1314 continue; 1315 } 1316 } 1317 1318 return err; 1319 } 1320 1321 int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1322 struct ceph_mds_session *session) 1323 { 1324 struct dentry *parent = req->r_dentry; 1325 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1326 struct qstr dname; 1327 struct dentry *dn; 1328 struct inode *in; 1329 int err = 0, ret, i; 1330 struct inode *snapdir = NULL; 1331 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; 1332 struct ceph_dentry_info *di; 1333 u64 r_readdir_offset = req->r_readdir_offset; 1334 u32 frag = le32_to_cpu(rhead->args.readdir.frag); 1335 1336 if (rinfo->dir_dir && 1337 le32_to_cpu(rinfo->dir_dir->frag) != frag) { 1338 dout("readdir_prepopulate got new frag %x -> %x\n", 1339 frag, le32_to_cpu(rinfo->dir_dir->frag)); 1340 frag = le32_to_cpu(rinfo->dir_dir->frag); 1341 if (ceph_frag_is_leftmost(frag)) 1342 r_readdir_offset = 2; 1343 else 1344 r_readdir_offset = 0; 1345 } 1346 1347 if (req->r_aborted) 1348 return readdir_prepopulate_inodes_only(req, session); 1349 1350 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { 1351 snapdir = ceph_get_snapdir(parent->d_inode); 1352 parent = d_find_alias(snapdir); 1353 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", 1354 rinfo->dir_nr, parent); 1355 } else { 1356 dout("readdir_prepopulate %d items under dn %p\n", 1357 rinfo->dir_nr, parent); 1358 if (rinfo->dir_dir) 1359 ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir); 1360 } 1361 1362 /* FIXME: release caps/leases if error occurs */ 1363 for (i = 0; i < rinfo->dir_nr; i++) { 1364 struct ceph_vino vino; 1365 1366 dname.name = rinfo->dir_dname[i]; 1367 dname.len = rinfo->dir_dname_len[i]; 1368 dname.hash = full_name_hash(dname.name, dname.len); 1369 1370 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); 1371 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); 1372 1373 retry_lookup: 1374 dn = d_lookup(parent, &dname); 1375 dout("d_lookup on parent=%p name=%.*s got %p\n", 1376 parent, dname.len, dname.name, dn); 1377 1378 if (!dn) { 1379 dn = d_alloc(parent, &dname); 1380 dout("d_alloc %p '%.*s' = %p\n", parent, 1381 dname.len, dname.name, dn); 1382 if (dn == NULL) { 1383 dout("d_alloc badness\n"); 1384 err = -ENOMEM; 1385 goto out; 1386 } 1387 ret = ceph_init_dentry(dn); 1388 if (ret < 0) { 1389 dput(dn); 1390 err = ret; 1391 goto out; 1392 } 1393 } else if (dn->d_inode && 1394 (ceph_ino(dn->d_inode) != vino.ino || 1395 ceph_snap(dn->d_inode) != vino.snap)) { 1396 dout(" dn %p points to wrong inode %p\n", 1397 dn, dn->d_inode); 1398 d_delete(dn); 1399 dput(dn); 1400 goto retry_lookup; 1401 } else { 1402 /* reorder parent's d_subdirs */ 1403 spin_lock(&parent->d_lock); 1404 spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); 1405 list_move(&dn->d_u.d_child, &parent->d_subdirs); 1406 spin_unlock(&dn->d_lock); 1407 spin_unlock(&parent->d_lock); 1408 } 1409 1410 /* inode */ 1411 if (dn->d_inode) { 1412 in = dn->d_inode; 1413 } else { 1414 in = ceph_get_inode(parent->d_sb, vino); 1415 if (IS_ERR(in)) { 1416 dout("new_inode badness\n"); 1417 d_drop(dn); 1418 dput(dn); 1419 err = PTR_ERR(in); 1420 goto out; 1421 } 1422 } 1423 1424 if (fill_inode(in, &rinfo->dir_in[i], NULL, session, 1425 req->r_request_started, -1, 1426 &req->r_caps_reservation) < 0) { 1427 pr_err("fill_inode badness on %p\n", in); 1428 if (!dn->d_inode) 1429 iput(in); 1430 d_drop(dn); 1431 goto next_item; 1432 } 1433 1434 if (!dn->d_inode) { 1435 dn = splice_dentry(dn, in, NULL); 1436 if (IS_ERR(dn)) { 1437 err = PTR_ERR(dn); 1438 dn = NULL; 1439 goto next_item; 1440 } 1441 } 1442 1443 di = dn->d_fsdata; 1444 di->offset = ceph_make_fpos(frag, i + r_readdir_offset); 1445 1446 update_dentry_lease(dn, rinfo->dir_dlease[i], 1447 req->r_session, 1448 req->r_request_started); 1449 next_item: 1450 if (dn) 1451 dput(dn); 1452 } 1453 if (err == 0) 1454 req->r_did_prepopulate = true; 1455 1456 out: 1457 if (snapdir) { 1458 iput(snapdir); 1459 dput(parent); 1460 } 1461 dout("readdir_prepopulate done\n"); 1462 return err; 1463 } 1464 1465 int ceph_inode_set_size(struct inode *inode, loff_t size) 1466 { 1467 struct ceph_inode_info *ci = ceph_inode(inode); 1468 int ret = 0; 1469 1470 spin_lock(&ci->i_ceph_lock); 1471 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); 1472 inode->i_size = size; 1473 inode->i_blocks = (size + (1 << 9) - 1) >> 9; 1474 1475 /* tell the MDS if we are approaching max_size */ 1476 if ((size << 1) >= ci->i_max_size && 1477 (ci->i_reported_size << 1) < ci->i_max_size) 1478 ret = 1; 1479 1480 spin_unlock(&ci->i_ceph_lock); 1481 return ret; 1482 } 1483 1484 /* 1485 * Write back inode data in a worker thread. (This can't be done 1486 * in the message handler context.) 1487 */ 1488 void ceph_queue_writeback(struct inode *inode) 1489 { 1490 ihold(inode); 1491 if (queue_work(ceph_inode_to_client(inode)->wb_wq, 1492 &ceph_inode(inode)->i_wb_work)) { 1493 dout("ceph_queue_writeback %p\n", inode); 1494 } else { 1495 dout("ceph_queue_writeback %p failed\n", inode); 1496 iput(inode); 1497 } 1498 } 1499 1500 static void ceph_writeback_work(struct work_struct *work) 1501 { 1502 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 1503 i_wb_work); 1504 struct inode *inode = &ci->vfs_inode; 1505 1506 dout("writeback %p\n", inode); 1507 filemap_fdatawrite(&inode->i_data); 1508 iput(inode); 1509 } 1510 1511 /* 1512 * queue an async invalidation 1513 */ 1514 void ceph_queue_invalidate(struct inode *inode) 1515 { 1516 ihold(inode); 1517 if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, 1518 &ceph_inode(inode)->i_pg_inv_work)) { 1519 dout("ceph_queue_invalidate %p\n", inode); 1520 } else { 1521 dout("ceph_queue_invalidate %p failed\n", inode); 1522 iput(inode); 1523 } 1524 } 1525 1526 /* 1527 * Invalidate inode pages in a worker thread. (This can't be done 1528 * in the message handler context.) 1529 */ 1530 static void ceph_invalidate_work(struct work_struct *work) 1531 { 1532 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 1533 i_pg_inv_work); 1534 struct inode *inode = &ci->vfs_inode; 1535 u32 orig_gen; 1536 int check = 0; 1537 1538 mutex_lock(&ci->i_truncate_mutex); 1539 spin_lock(&ci->i_ceph_lock); 1540 dout("invalidate_pages %p gen %d revoking %d\n", inode, 1541 ci->i_rdcache_gen, ci->i_rdcache_revoking); 1542 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { 1543 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 1544 check = 1; 1545 spin_unlock(&ci->i_ceph_lock); 1546 mutex_unlock(&ci->i_truncate_mutex); 1547 goto out; 1548 } 1549 orig_gen = ci->i_rdcache_gen; 1550 spin_unlock(&ci->i_ceph_lock); 1551 1552 truncate_pagecache(inode, 0); 1553 1554 spin_lock(&ci->i_ceph_lock); 1555 if (orig_gen == ci->i_rdcache_gen && 1556 orig_gen == ci->i_rdcache_revoking) { 1557 dout("invalidate_pages %p gen %d successful\n", inode, 1558 ci->i_rdcache_gen); 1559 ci->i_rdcache_revoking--; 1560 check = 1; 1561 } else { 1562 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", 1563 inode, orig_gen, ci->i_rdcache_gen, 1564 ci->i_rdcache_revoking); 1565 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 1566 check = 1; 1567 } 1568 spin_unlock(&ci->i_ceph_lock); 1569 mutex_unlock(&ci->i_truncate_mutex); 1570 out: 1571 if (check) 1572 ceph_check_caps(ci, 0, NULL); 1573 iput(inode); 1574 } 1575 1576 1577 /* 1578 * called by trunc_wq; 1579 * 1580 * We also truncate in a separate thread as well. 1581 */ 1582 static void ceph_vmtruncate_work(struct work_struct *work) 1583 { 1584 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 1585 i_vmtruncate_work); 1586 struct inode *inode = &ci->vfs_inode; 1587 1588 dout("vmtruncate_work %p\n", inode); 1589 __ceph_do_pending_vmtruncate(inode); 1590 iput(inode); 1591 } 1592 1593 /* 1594 * Queue an async vmtruncate. If we fail to queue work, we will handle 1595 * the truncation the next time we call __ceph_do_pending_vmtruncate. 1596 */ 1597 void ceph_queue_vmtruncate(struct inode *inode) 1598 { 1599 struct ceph_inode_info *ci = ceph_inode(inode); 1600 1601 ihold(inode); 1602 1603 if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, 1604 &ci->i_vmtruncate_work)) { 1605 dout("ceph_queue_vmtruncate %p\n", inode); 1606 } else { 1607 dout("ceph_queue_vmtruncate %p failed, pending=%d\n", 1608 inode, ci->i_truncate_pending); 1609 iput(inode); 1610 } 1611 } 1612 1613 /* 1614 * Make sure any pending truncation is applied before doing anything 1615 * that may depend on it. 1616 */ 1617 void __ceph_do_pending_vmtruncate(struct inode *inode) 1618 { 1619 struct ceph_inode_info *ci = ceph_inode(inode); 1620 u64 to; 1621 int wrbuffer_refs, finish = 0; 1622 1623 mutex_lock(&ci->i_truncate_mutex); 1624 retry: 1625 spin_lock(&ci->i_ceph_lock); 1626 if (ci->i_truncate_pending == 0) { 1627 dout("__do_pending_vmtruncate %p none pending\n", inode); 1628 spin_unlock(&ci->i_ceph_lock); 1629 mutex_unlock(&ci->i_truncate_mutex); 1630 return; 1631 } 1632 1633 /* 1634 * make sure any dirty snapped pages are flushed before we 1635 * possibly truncate them.. so write AND block! 1636 */ 1637 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { 1638 dout("__do_pending_vmtruncate %p flushing snaps first\n", 1639 inode); 1640 spin_unlock(&ci->i_ceph_lock); 1641 filemap_write_and_wait_range(&inode->i_data, 0, 1642 inode->i_sb->s_maxbytes); 1643 goto retry; 1644 } 1645 1646 /* there should be no reader or writer */ 1647 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); 1648 1649 to = ci->i_truncate_size; 1650 wrbuffer_refs = ci->i_wrbuffer_ref; 1651 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, 1652 ci->i_truncate_pending, to); 1653 spin_unlock(&ci->i_ceph_lock); 1654 1655 truncate_pagecache(inode, to); 1656 1657 spin_lock(&ci->i_ceph_lock); 1658 if (to == ci->i_truncate_size) { 1659 ci->i_truncate_pending = 0; 1660 finish = 1; 1661 } 1662 spin_unlock(&ci->i_ceph_lock); 1663 if (!finish) 1664 goto retry; 1665 1666 mutex_unlock(&ci->i_truncate_mutex); 1667 1668 if (wrbuffer_refs == 0) 1669 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); 1670 1671 wake_up_all(&ci->i_cap_wq); 1672 } 1673 1674 /* 1675 * symlinks 1676 */ 1677 static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd) 1678 { 1679 struct ceph_inode_info *ci = ceph_inode(dentry->d_inode); 1680 nd_set_link(nd, ci->i_symlink); 1681 return NULL; 1682 } 1683 1684 static const struct inode_operations ceph_symlink_iops = { 1685 .readlink = generic_readlink, 1686 .follow_link = ceph_sym_follow_link, 1687 .setattr = ceph_setattr, 1688 .getattr = ceph_getattr, 1689 .setxattr = ceph_setxattr, 1690 .getxattr = ceph_getxattr, 1691 .listxattr = ceph_listxattr, 1692 .removexattr = ceph_removexattr, 1693 }; 1694 1695 /* 1696 * setattr 1697 */ 1698 int ceph_setattr(struct dentry *dentry, struct iattr *attr) 1699 { 1700 struct inode *inode = dentry->d_inode; 1701 struct ceph_inode_info *ci = ceph_inode(inode); 1702 const unsigned int ia_valid = attr->ia_valid; 1703 struct ceph_mds_request *req; 1704 struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc; 1705 int issued; 1706 int release = 0, dirtied = 0; 1707 int mask = 0; 1708 int err = 0; 1709 int inode_dirty_flags = 0; 1710 1711 if (ceph_snap(inode) != CEPH_NOSNAP) 1712 return -EROFS; 1713 1714 err = inode_change_ok(inode, attr); 1715 if (err != 0) 1716 return err; 1717 1718 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, 1719 USE_AUTH_MDS); 1720 if (IS_ERR(req)) 1721 return PTR_ERR(req); 1722 1723 spin_lock(&ci->i_ceph_lock); 1724 issued = __ceph_caps_issued(ci, NULL); 1725 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); 1726 1727 if (ia_valid & ATTR_UID) { 1728 dout("setattr %p uid %d -> %d\n", inode, 1729 from_kuid(&init_user_ns, inode->i_uid), 1730 from_kuid(&init_user_ns, attr->ia_uid)); 1731 if (issued & CEPH_CAP_AUTH_EXCL) { 1732 inode->i_uid = attr->ia_uid; 1733 dirtied |= CEPH_CAP_AUTH_EXCL; 1734 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 1735 !uid_eq(attr->ia_uid, inode->i_uid)) { 1736 req->r_args.setattr.uid = cpu_to_le32( 1737 from_kuid(&init_user_ns, attr->ia_uid)); 1738 mask |= CEPH_SETATTR_UID; 1739 release |= CEPH_CAP_AUTH_SHARED; 1740 } 1741 } 1742 if (ia_valid & ATTR_GID) { 1743 dout("setattr %p gid %d -> %d\n", inode, 1744 from_kgid(&init_user_ns, inode->i_gid), 1745 from_kgid(&init_user_ns, attr->ia_gid)); 1746 if (issued & CEPH_CAP_AUTH_EXCL) { 1747 inode->i_gid = attr->ia_gid; 1748 dirtied |= CEPH_CAP_AUTH_EXCL; 1749 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 1750 !gid_eq(attr->ia_gid, inode->i_gid)) { 1751 req->r_args.setattr.gid = cpu_to_le32( 1752 from_kgid(&init_user_ns, attr->ia_gid)); 1753 mask |= CEPH_SETATTR_GID; 1754 release |= CEPH_CAP_AUTH_SHARED; 1755 } 1756 } 1757 if (ia_valid & ATTR_MODE) { 1758 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, 1759 attr->ia_mode); 1760 if (issued & CEPH_CAP_AUTH_EXCL) { 1761 inode->i_mode = attr->ia_mode; 1762 dirtied |= CEPH_CAP_AUTH_EXCL; 1763 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 1764 attr->ia_mode != inode->i_mode) { 1765 inode->i_mode = attr->ia_mode; 1766 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); 1767 mask |= CEPH_SETATTR_MODE; 1768 release |= CEPH_CAP_AUTH_SHARED; 1769 } 1770 } 1771 1772 if (ia_valid & ATTR_ATIME) { 1773 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, 1774 inode->i_atime.tv_sec, inode->i_atime.tv_nsec, 1775 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); 1776 if (issued & CEPH_CAP_FILE_EXCL) { 1777 ci->i_time_warp_seq++; 1778 inode->i_atime = attr->ia_atime; 1779 dirtied |= CEPH_CAP_FILE_EXCL; 1780 } else if ((issued & CEPH_CAP_FILE_WR) && 1781 timespec_compare(&inode->i_atime, 1782 &attr->ia_atime) < 0) { 1783 inode->i_atime = attr->ia_atime; 1784 dirtied |= CEPH_CAP_FILE_WR; 1785 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 1786 !timespec_equal(&inode->i_atime, &attr->ia_atime)) { 1787 ceph_encode_timespec(&req->r_args.setattr.atime, 1788 &attr->ia_atime); 1789 mask |= CEPH_SETATTR_ATIME; 1790 release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | 1791 CEPH_CAP_FILE_WR; 1792 } 1793 } 1794 if (ia_valid & ATTR_MTIME) { 1795 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, 1796 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 1797 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); 1798 if (issued & CEPH_CAP_FILE_EXCL) { 1799 ci->i_time_warp_seq++; 1800 inode->i_mtime = attr->ia_mtime; 1801 dirtied |= CEPH_CAP_FILE_EXCL; 1802 } else if ((issued & CEPH_CAP_FILE_WR) && 1803 timespec_compare(&inode->i_mtime, 1804 &attr->ia_mtime) < 0) { 1805 inode->i_mtime = attr->ia_mtime; 1806 dirtied |= CEPH_CAP_FILE_WR; 1807 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 1808 !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { 1809 ceph_encode_timespec(&req->r_args.setattr.mtime, 1810 &attr->ia_mtime); 1811 mask |= CEPH_SETATTR_MTIME; 1812 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | 1813 CEPH_CAP_FILE_WR; 1814 } 1815 } 1816 if (ia_valid & ATTR_SIZE) { 1817 dout("setattr %p size %lld -> %lld\n", inode, 1818 inode->i_size, attr->ia_size); 1819 if ((issued & CEPH_CAP_FILE_EXCL) && 1820 attr->ia_size > inode->i_size) { 1821 inode->i_size = attr->ia_size; 1822 inode->i_blocks = 1823 (attr->ia_size + (1 << 9) - 1) >> 9; 1824 inode->i_ctime = attr->ia_ctime; 1825 ci->i_reported_size = attr->ia_size; 1826 dirtied |= CEPH_CAP_FILE_EXCL; 1827 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 1828 attr->ia_size != inode->i_size) { 1829 req->r_args.setattr.size = cpu_to_le64(attr->ia_size); 1830 req->r_args.setattr.old_size = 1831 cpu_to_le64(inode->i_size); 1832 mask |= CEPH_SETATTR_SIZE; 1833 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | 1834 CEPH_CAP_FILE_WR; 1835 } 1836 } 1837 1838 /* these do nothing */ 1839 if (ia_valid & ATTR_CTIME) { 1840 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| 1841 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; 1842 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, 1843 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 1844 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, 1845 only ? "ctime only" : "ignored"); 1846 inode->i_ctime = attr->ia_ctime; 1847 if (only) { 1848 /* 1849 * if kernel wants to dirty ctime but nothing else, 1850 * we need to choose a cap to dirty under, or do 1851 * a almost-no-op setattr 1852 */ 1853 if (issued & CEPH_CAP_AUTH_EXCL) 1854 dirtied |= CEPH_CAP_AUTH_EXCL; 1855 else if (issued & CEPH_CAP_FILE_EXCL) 1856 dirtied |= CEPH_CAP_FILE_EXCL; 1857 else if (issued & CEPH_CAP_XATTR_EXCL) 1858 dirtied |= CEPH_CAP_XATTR_EXCL; 1859 else 1860 mask |= CEPH_SETATTR_CTIME; 1861 } 1862 } 1863 if (ia_valid & ATTR_FILE) 1864 dout("setattr %p ATTR_FILE ... hrm!\n", inode); 1865 1866 if (dirtied) { 1867 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied); 1868 inode->i_ctime = CURRENT_TIME; 1869 } 1870 1871 release &= issued; 1872 spin_unlock(&ci->i_ceph_lock); 1873 1874 if (inode_dirty_flags) 1875 __mark_inode_dirty(inode, inode_dirty_flags); 1876 1877 if (ia_valid & ATTR_MODE) { 1878 err = posix_acl_chmod(inode, attr->ia_mode); 1879 if (err) 1880 goto out_put; 1881 } 1882 1883 if (mask) { 1884 req->r_inode = inode; 1885 ihold(inode); 1886 req->r_inode_drop = release; 1887 req->r_args.setattr.mask = cpu_to_le32(mask); 1888 req->r_num_caps = 1; 1889 err = ceph_mdsc_do_request(mdsc, NULL, req); 1890 } 1891 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, 1892 ceph_cap_string(dirtied), mask); 1893 1894 ceph_mdsc_put_request(req); 1895 if (mask & CEPH_SETATTR_SIZE) 1896 __ceph_do_pending_vmtruncate(inode); 1897 return err; 1898 out_put: 1899 ceph_mdsc_put_request(req); 1900 return err; 1901 } 1902 1903 /* 1904 * Verify that we have a lease on the given mask. If not, 1905 * do a getattr against an mds. 1906 */ 1907 int ceph_do_getattr(struct inode *inode, int mask, bool force) 1908 { 1909 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); 1910 struct ceph_mds_client *mdsc = fsc->mdsc; 1911 struct ceph_mds_request *req; 1912 int err; 1913 1914 if (ceph_snap(inode) == CEPH_SNAPDIR) { 1915 dout("do_getattr inode %p SNAPDIR\n", inode); 1916 return 0; 1917 } 1918 1919 dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode); 1920 if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) 1921 return 0; 1922 1923 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); 1924 if (IS_ERR(req)) 1925 return PTR_ERR(req); 1926 req->r_inode = inode; 1927 ihold(inode); 1928 req->r_num_caps = 1; 1929 req->r_args.getattr.mask = cpu_to_le32(mask); 1930 err = ceph_mdsc_do_request(mdsc, NULL, req); 1931 ceph_mdsc_put_request(req); 1932 dout("do_getattr result=%d\n", err); 1933 return err; 1934 } 1935 1936 1937 /* 1938 * Check inode permissions. We verify we have a valid value for 1939 * the AUTH cap, then call the generic handler. 1940 */ 1941 int ceph_permission(struct inode *inode, int mask) 1942 { 1943 int err; 1944 1945 if (mask & MAY_NOT_BLOCK) 1946 return -ECHILD; 1947 1948 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); 1949 1950 if (!err) 1951 err = generic_permission(inode, mask); 1952 return err; 1953 } 1954 1955 /* 1956 * Get all attributes. Hopefully somedata we'll have a statlite() 1957 * and can limit the fields we require to be accurate. 1958 */ 1959 int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, 1960 struct kstat *stat) 1961 { 1962 struct inode *inode = dentry->d_inode; 1963 struct ceph_inode_info *ci = ceph_inode(inode); 1964 int err; 1965 1966 err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false); 1967 if (!err) { 1968 generic_fillattr(inode, stat); 1969 stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino); 1970 if (ceph_snap(inode) != CEPH_NOSNAP) 1971 stat->dev = ceph_snap(inode); 1972 else 1973 stat->dev = 0; 1974 if (S_ISDIR(inode->i_mode)) { 1975 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), 1976 RBYTES)) 1977 stat->size = ci->i_rbytes; 1978 else 1979 stat->size = ci->i_files + ci->i_subdirs; 1980 stat->blocks = 0; 1981 stat->blksize = 65536; 1982 } 1983 } 1984 return err; 1985 } 1986