1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/ceph/ceph_debug.h> 3 4 #include <linux/module.h> 5 #include <linux/fs.h> 6 #include <linux/slab.h> 7 #include <linux/string.h> 8 #include <linux/uaccess.h> 9 #include <linux/kernel.h> 10 #include <linux/writeback.h> 11 #include <linux/vmalloc.h> 12 #include <linux/xattr.h> 13 #include <linux/posix_acl.h> 14 #include <linux/random.h> 15 #include <linux/sort.h> 16 #include <linux/iversion.h> 17 #include <linux/fscrypt.h> 18 19 #include "super.h" 20 #include "mds_client.h" 21 #include "cache.h" 22 #include "crypto.h" 23 #include <linux/ceph/decode.h> 24 25 /* 26 * Ceph inode operations 27 * 28 * Implement basic inode helpers (get, alloc) and inode ops (getattr, 29 * setattr, etc.), xattr helpers, and helpers for assimilating 30 * metadata returned by the MDS into our cache. 31 * 32 * Also define helpers for doing asynchronous writeback, invalidation, 33 * and truncation for the benefit of those who can't afford to block 34 * (typically because they are in the message handler path). 35 */ 36 37 static const struct inode_operations ceph_symlink_iops; 38 static const struct inode_operations ceph_encrypted_symlink_iops; 39 40 static void ceph_inode_work(struct work_struct *work); 41 42 /* 43 * find or create an inode, given the ceph ino number 44 */ 45 static int ceph_set_ino_cb(struct inode *inode, void *data) 46 { 47 struct ceph_inode_info *ci = ceph_inode(inode); 48 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 49 50 ci->i_vino = *(struct ceph_vino *)data; 51 inode->i_ino = ceph_vino_to_ino_t(ci->i_vino); 52 inode_set_iversion_raw(inode, 0); 53 percpu_counter_inc(&mdsc->metric.total_inodes); 54 55 return 0; 56 } 57 58 /** 59 * ceph_new_inode - allocate a new inode in advance of an expected create 60 * @dir: parent directory for new inode 61 * @dentry: dentry that may eventually point to new inode 62 * @mode: mode of new inode 63 * @as_ctx: pointer to inherited security context 64 * 65 * Allocate a new inode in advance of an operation to create a new inode. 66 * This allocates the inode and sets up the acl_sec_ctx with appropriate 67 * info for the new inode. 68 * 69 * Returns a pointer to the new inode or an ERR_PTR. 70 */ 71 struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry, 72 umode_t *mode, struct ceph_acl_sec_ctx *as_ctx) 73 { 74 int err; 75 struct inode *inode; 76 77 inode = new_inode(dir->i_sb); 78 if (!inode) 79 return ERR_PTR(-ENOMEM); 80 81 if (!S_ISLNK(*mode)) { 82 err = ceph_pre_init_acls(dir, mode, as_ctx); 83 if (err < 0) 84 goto out_err; 85 } 86 87 inode->i_state = 0; 88 inode->i_mode = *mode; 89 90 err = ceph_security_init_secctx(dentry, *mode, as_ctx); 91 if (err < 0) 92 goto out_err; 93 94 err = ceph_fscrypt_prepare_context(dir, inode, as_ctx); 95 if (err) 96 goto out_err; 97 98 return inode; 99 out_err: 100 iput(inode); 101 return ERR_PTR(err); 102 } 103 104 void ceph_as_ctx_to_req(struct ceph_mds_request *req, 105 struct ceph_acl_sec_ctx *as_ctx) 106 { 107 if (as_ctx->pagelist) { 108 req->r_pagelist = as_ctx->pagelist; 109 as_ctx->pagelist = NULL; 110 } 111 ceph_fscrypt_as_ctx_to_req(req, as_ctx); 112 } 113 114 /** 115 * ceph_get_inode - find or create/hash a new inode 116 * @sb: superblock to search and allocate in 117 * @vino: vino to search for 118 * @newino: optional new inode to insert if one isn't found (may be NULL) 119 * 120 * Search for or insert a new inode into the hash for the given vino, and 121 * return a reference to it. If new is non-NULL, its reference is consumed. 122 */ 123 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino, 124 struct inode *newino) 125 { 126 struct inode *inode; 127 128 if (ceph_vino_is_reserved(vino)) 129 return ERR_PTR(-EREMOTEIO); 130 131 if (newino) { 132 inode = inode_insert5(newino, (unsigned long)vino.ino, 133 ceph_ino_compare, ceph_set_ino_cb, &vino); 134 if (inode != newino) 135 iput(newino); 136 } else { 137 inode = iget5_locked(sb, (unsigned long)vino.ino, 138 ceph_ino_compare, ceph_set_ino_cb, &vino); 139 } 140 141 if (!inode) { 142 dout("No inode found for %llx.%llx\n", vino.ino, vino.snap); 143 return ERR_PTR(-ENOMEM); 144 } 145 146 dout("get_inode on %llu=%llx.%llx got %p new %d\n", ceph_present_inode(inode), 147 ceph_vinop(inode), inode, !!(inode->i_state & I_NEW)); 148 return inode; 149 } 150 151 /* 152 * get/constuct snapdir inode for a given directory 153 */ 154 struct inode *ceph_get_snapdir(struct inode *parent) 155 { 156 struct ceph_vino vino = { 157 .ino = ceph_ino(parent), 158 .snap = CEPH_SNAPDIR, 159 }; 160 struct inode *inode = ceph_get_inode(parent->i_sb, vino, NULL); 161 struct ceph_inode_info *ci = ceph_inode(inode); 162 163 if (IS_ERR(inode)) 164 return inode; 165 166 if (!S_ISDIR(parent->i_mode)) { 167 pr_warn_once("bad snapdir parent type (mode=0%o)\n", 168 parent->i_mode); 169 goto err; 170 } 171 172 if (!(inode->i_state & I_NEW) && !S_ISDIR(inode->i_mode)) { 173 pr_warn_once("bad snapdir inode type (mode=0%o)\n", 174 inode->i_mode); 175 goto err; 176 } 177 178 inode->i_mode = parent->i_mode; 179 inode->i_uid = parent->i_uid; 180 inode->i_gid = parent->i_gid; 181 inode->i_mtime = parent->i_mtime; 182 inode->i_ctime = parent->i_ctime; 183 inode->i_atime = parent->i_atime; 184 ci->i_rbytes = 0; 185 ci->i_btime = ceph_inode(parent)->i_btime; 186 187 if (inode->i_state & I_NEW) { 188 inode->i_op = &ceph_snapdir_iops; 189 inode->i_fop = &ceph_snapdir_fops; 190 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ 191 unlock_new_inode(inode); 192 } 193 194 return inode; 195 err: 196 if ((inode->i_state & I_NEW)) 197 discard_new_inode(inode); 198 else 199 iput(inode); 200 return ERR_PTR(-ENOTDIR); 201 } 202 203 const struct inode_operations ceph_file_iops = { 204 .permission = ceph_permission, 205 .setattr = ceph_setattr, 206 .getattr = ceph_getattr, 207 .listxattr = ceph_listxattr, 208 .get_inode_acl = ceph_get_acl, 209 .set_acl = ceph_set_acl, 210 }; 211 212 213 /* 214 * We use a 'frag tree' to keep track of the MDS's directory fragments 215 * for a given inode (usually there is just a single fragment). We 216 * need to know when a child frag is delegated to a new MDS, or when 217 * it is flagged as replicated, so we can direct our requests 218 * accordingly. 219 */ 220 221 /* 222 * find/create a frag in the tree 223 */ 224 static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, 225 u32 f) 226 { 227 struct rb_node **p; 228 struct rb_node *parent = NULL; 229 struct ceph_inode_frag *frag; 230 int c; 231 232 p = &ci->i_fragtree.rb_node; 233 while (*p) { 234 parent = *p; 235 frag = rb_entry(parent, struct ceph_inode_frag, node); 236 c = ceph_frag_compare(f, frag->frag); 237 if (c < 0) 238 p = &(*p)->rb_left; 239 else if (c > 0) 240 p = &(*p)->rb_right; 241 else 242 return frag; 243 } 244 245 frag = kmalloc(sizeof(*frag), GFP_NOFS); 246 if (!frag) 247 return ERR_PTR(-ENOMEM); 248 249 frag->frag = f; 250 frag->split_by = 0; 251 frag->mds = -1; 252 frag->ndist = 0; 253 254 rb_link_node(&frag->node, parent, p); 255 rb_insert_color(&frag->node, &ci->i_fragtree); 256 257 dout("get_or_create_frag added %llx.%llx frag %x\n", 258 ceph_vinop(&ci->netfs.inode), f); 259 return frag; 260 } 261 262 /* 263 * find a specific frag @f 264 */ 265 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) 266 { 267 struct rb_node *n = ci->i_fragtree.rb_node; 268 269 while (n) { 270 struct ceph_inode_frag *frag = 271 rb_entry(n, struct ceph_inode_frag, node); 272 int c = ceph_frag_compare(f, frag->frag); 273 if (c < 0) 274 n = n->rb_left; 275 else if (c > 0) 276 n = n->rb_right; 277 else 278 return frag; 279 } 280 return NULL; 281 } 282 283 /* 284 * Choose frag containing the given value @v. If @pfrag is 285 * specified, copy the frag delegation info to the caller if 286 * it is present. 287 */ 288 static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 289 struct ceph_inode_frag *pfrag, int *found) 290 { 291 u32 t = ceph_frag_make(0, 0); 292 struct ceph_inode_frag *frag; 293 unsigned nway, i; 294 u32 n; 295 296 if (found) 297 *found = 0; 298 299 while (1) { 300 WARN_ON(!ceph_frag_contains_value(t, v)); 301 frag = __ceph_find_frag(ci, t); 302 if (!frag) 303 break; /* t is a leaf */ 304 if (frag->split_by == 0) { 305 if (pfrag) 306 memcpy(pfrag, frag, sizeof(*pfrag)); 307 if (found) 308 *found = 1; 309 break; 310 } 311 312 /* choose child */ 313 nway = 1 << frag->split_by; 314 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, 315 frag->split_by, nway); 316 for (i = 0; i < nway; i++) { 317 n = ceph_frag_make_child(t, frag->split_by, i); 318 if (ceph_frag_contains_value(n, v)) { 319 t = n; 320 break; 321 } 322 } 323 BUG_ON(i == nway); 324 } 325 dout("choose_frag(%x) = %x\n", v, t); 326 327 return t; 328 } 329 330 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 331 struct ceph_inode_frag *pfrag, int *found) 332 { 333 u32 ret; 334 mutex_lock(&ci->i_fragtree_mutex); 335 ret = __ceph_choose_frag(ci, v, pfrag, found); 336 mutex_unlock(&ci->i_fragtree_mutex); 337 return ret; 338 } 339 340 /* 341 * Process dirfrag (delegation) info from the mds. Include leaf 342 * fragment in tree ONLY if ndist > 0. Otherwise, only 343 * branches/splits are included in i_fragtree) 344 */ 345 static int ceph_fill_dirfrag(struct inode *inode, 346 struct ceph_mds_reply_dirfrag *dirinfo) 347 { 348 struct ceph_inode_info *ci = ceph_inode(inode); 349 struct ceph_inode_frag *frag; 350 u32 id = le32_to_cpu(dirinfo->frag); 351 int mds = le32_to_cpu(dirinfo->auth); 352 int ndist = le32_to_cpu(dirinfo->ndist); 353 int diri_auth = -1; 354 int i; 355 int err = 0; 356 357 spin_lock(&ci->i_ceph_lock); 358 if (ci->i_auth_cap) 359 diri_auth = ci->i_auth_cap->mds; 360 spin_unlock(&ci->i_ceph_lock); 361 362 if (mds == -1) /* CDIR_AUTH_PARENT */ 363 mds = diri_auth; 364 365 mutex_lock(&ci->i_fragtree_mutex); 366 if (ndist == 0 && mds == diri_auth) { 367 /* no delegation info needed. */ 368 frag = __ceph_find_frag(ci, id); 369 if (!frag) 370 goto out; 371 if (frag->split_by == 0) { 372 /* tree leaf, remove */ 373 dout("fill_dirfrag removed %llx.%llx frag %x" 374 " (no ref)\n", ceph_vinop(inode), id); 375 rb_erase(&frag->node, &ci->i_fragtree); 376 kfree(frag); 377 } else { 378 /* tree branch, keep and clear */ 379 dout("fill_dirfrag cleared %llx.%llx frag %x" 380 " referral\n", ceph_vinop(inode), id); 381 frag->mds = -1; 382 frag->ndist = 0; 383 } 384 goto out; 385 } 386 387 388 /* find/add this frag to store mds delegation info */ 389 frag = __get_or_create_frag(ci, id); 390 if (IS_ERR(frag)) { 391 /* this is not the end of the world; we can continue 392 with bad/inaccurate delegation info */ 393 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", 394 ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); 395 err = -ENOMEM; 396 goto out; 397 } 398 399 frag->mds = mds; 400 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); 401 for (i = 0; i < frag->ndist; i++) 402 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); 403 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", 404 ceph_vinop(inode), frag->frag, frag->ndist); 405 406 out: 407 mutex_unlock(&ci->i_fragtree_mutex); 408 return err; 409 } 410 411 static int frag_tree_split_cmp(const void *l, const void *r) 412 { 413 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l; 414 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r; 415 return ceph_frag_compare(le32_to_cpu(ls->frag), 416 le32_to_cpu(rs->frag)); 417 } 418 419 static bool is_frag_child(u32 f, struct ceph_inode_frag *frag) 420 { 421 if (!frag) 422 return f == ceph_frag_make(0, 0); 423 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by) 424 return false; 425 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f)); 426 } 427 428 static int ceph_fill_fragtree(struct inode *inode, 429 struct ceph_frag_tree_head *fragtree, 430 struct ceph_mds_reply_dirfrag *dirinfo) 431 { 432 struct ceph_inode_info *ci = ceph_inode(inode); 433 struct ceph_inode_frag *frag, *prev_frag = NULL; 434 struct rb_node *rb_node; 435 unsigned i, split_by, nsplits; 436 u32 id; 437 bool update = false; 438 439 mutex_lock(&ci->i_fragtree_mutex); 440 nsplits = le32_to_cpu(fragtree->nsplits); 441 if (nsplits != ci->i_fragtree_nsplits) { 442 update = true; 443 } else if (nsplits) { 444 i = get_random_u32_below(nsplits); 445 id = le32_to_cpu(fragtree->splits[i].frag); 446 if (!__ceph_find_frag(ci, id)) 447 update = true; 448 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { 449 rb_node = rb_first(&ci->i_fragtree); 450 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 451 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) 452 update = true; 453 } 454 if (!update && dirinfo) { 455 id = le32_to_cpu(dirinfo->frag); 456 if (id != __ceph_choose_frag(ci, id, NULL, NULL)) 457 update = true; 458 } 459 if (!update) 460 goto out_unlock; 461 462 if (nsplits > 1) { 463 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]), 464 frag_tree_split_cmp, NULL); 465 } 466 467 dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode)); 468 rb_node = rb_first(&ci->i_fragtree); 469 for (i = 0; i < nsplits; i++) { 470 id = le32_to_cpu(fragtree->splits[i].frag); 471 split_by = le32_to_cpu(fragtree->splits[i].by); 472 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) { 473 pr_err("fill_fragtree %llx.%llx invalid split %d/%u, " 474 "frag %x split by %d\n", ceph_vinop(inode), 475 i, nsplits, id, split_by); 476 continue; 477 } 478 frag = NULL; 479 while (rb_node) { 480 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 481 if (ceph_frag_compare(frag->frag, id) >= 0) { 482 if (frag->frag != id) 483 frag = NULL; 484 else 485 rb_node = rb_next(rb_node); 486 break; 487 } 488 rb_node = rb_next(rb_node); 489 /* delete stale split/leaf node */ 490 if (frag->split_by > 0 || 491 !is_frag_child(frag->frag, prev_frag)) { 492 rb_erase(&frag->node, &ci->i_fragtree); 493 if (frag->split_by > 0) 494 ci->i_fragtree_nsplits--; 495 kfree(frag); 496 } 497 frag = NULL; 498 } 499 if (!frag) { 500 frag = __get_or_create_frag(ci, id); 501 if (IS_ERR(frag)) 502 continue; 503 } 504 if (frag->split_by == 0) 505 ci->i_fragtree_nsplits++; 506 frag->split_by = split_by; 507 dout(" frag %x split by %d\n", frag->frag, frag->split_by); 508 prev_frag = frag; 509 } 510 while (rb_node) { 511 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 512 rb_node = rb_next(rb_node); 513 /* delete stale split/leaf node */ 514 if (frag->split_by > 0 || 515 !is_frag_child(frag->frag, prev_frag)) { 516 rb_erase(&frag->node, &ci->i_fragtree); 517 if (frag->split_by > 0) 518 ci->i_fragtree_nsplits--; 519 kfree(frag); 520 } 521 } 522 out_unlock: 523 mutex_unlock(&ci->i_fragtree_mutex); 524 return 0; 525 } 526 527 /* 528 * initialize a newly allocated inode. 529 */ 530 struct inode *ceph_alloc_inode(struct super_block *sb) 531 { 532 struct ceph_inode_info *ci; 533 int i; 534 535 ci = alloc_inode_sb(sb, ceph_inode_cachep, GFP_NOFS); 536 if (!ci) 537 return NULL; 538 539 dout("alloc_inode %p\n", &ci->netfs.inode); 540 541 /* Set parameters for the netfs library */ 542 netfs_inode_init(&ci->netfs, &ceph_netfs_ops); 543 544 spin_lock_init(&ci->i_ceph_lock); 545 546 ci->i_version = 0; 547 ci->i_inline_version = 0; 548 ci->i_time_warp_seq = 0; 549 ci->i_ceph_flags = 0; 550 atomic64_set(&ci->i_ordered_count, 1); 551 atomic64_set(&ci->i_release_count, 1); 552 atomic64_set(&ci->i_complete_seq[0], 0); 553 atomic64_set(&ci->i_complete_seq[1], 0); 554 ci->i_symlink = NULL; 555 556 ci->i_max_bytes = 0; 557 ci->i_max_files = 0; 558 559 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); 560 memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout)); 561 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL); 562 563 ci->i_fragtree = RB_ROOT; 564 mutex_init(&ci->i_fragtree_mutex); 565 566 ci->i_xattrs.blob = NULL; 567 ci->i_xattrs.prealloc_blob = NULL; 568 ci->i_xattrs.dirty = false; 569 ci->i_xattrs.index = RB_ROOT; 570 ci->i_xattrs.count = 0; 571 ci->i_xattrs.names_size = 0; 572 ci->i_xattrs.vals_size = 0; 573 ci->i_xattrs.version = 0; 574 ci->i_xattrs.index_version = 0; 575 576 ci->i_caps = RB_ROOT; 577 ci->i_auth_cap = NULL; 578 ci->i_dirty_caps = 0; 579 ci->i_flushing_caps = 0; 580 INIT_LIST_HEAD(&ci->i_dirty_item); 581 INIT_LIST_HEAD(&ci->i_flushing_item); 582 ci->i_prealloc_cap_flush = NULL; 583 INIT_LIST_HEAD(&ci->i_cap_flush_list); 584 init_waitqueue_head(&ci->i_cap_wq); 585 ci->i_hold_caps_max = 0; 586 INIT_LIST_HEAD(&ci->i_cap_delay_list); 587 INIT_LIST_HEAD(&ci->i_cap_snaps); 588 ci->i_head_snapc = NULL; 589 ci->i_snap_caps = 0; 590 591 ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ; 592 for (i = 0; i < CEPH_FILE_MODE_BITS; i++) 593 ci->i_nr_by_mode[i] = 0; 594 595 mutex_init(&ci->i_truncate_mutex); 596 ci->i_truncate_seq = 0; 597 ci->i_truncate_size = 0; 598 ci->i_truncate_pending = 0; 599 ci->i_truncate_pagecache_size = 0; 600 601 ci->i_max_size = 0; 602 ci->i_reported_size = 0; 603 ci->i_wanted_max_size = 0; 604 ci->i_requested_max_size = 0; 605 606 ci->i_pin_ref = 0; 607 ci->i_rd_ref = 0; 608 ci->i_rdcache_ref = 0; 609 ci->i_wr_ref = 0; 610 ci->i_wb_ref = 0; 611 ci->i_fx_ref = 0; 612 ci->i_wrbuffer_ref = 0; 613 ci->i_wrbuffer_ref_head = 0; 614 atomic_set(&ci->i_filelock_ref, 0); 615 atomic_set(&ci->i_shared_gen, 1); 616 ci->i_rdcache_gen = 0; 617 ci->i_rdcache_revoking = 0; 618 619 INIT_LIST_HEAD(&ci->i_unsafe_dirops); 620 INIT_LIST_HEAD(&ci->i_unsafe_iops); 621 spin_lock_init(&ci->i_unsafe_lock); 622 623 ci->i_snap_realm = NULL; 624 INIT_LIST_HEAD(&ci->i_snap_realm_item); 625 INIT_LIST_HEAD(&ci->i_snap_flush_item); 626 627 INIT_WORK(&ci->i_work, ceph_inode_work); 628 ci->i_work_mask = 0; 629 memset(&ci->i_btime, '\0', sizeof(ci->i_btime)); 630 #ifdef CONFIG_FS_ENCRYPTION 631 ci->fscrypt_auth = NULL; 632 ci->fscrypt_auth_len = 0; 633 #endif 634 return &ci->netfs.inode; 635 } 636 637 void ceph_free_inode(struct inode *inode) 638 { 639 struct ceph_inode_info *ci = ceph_inode(inode); 640 641 kfree(ci->i_symlink); 642 #ifdef CONFIG_FS_ENCRYPTION 643 kfree(ci->fscrypt_auth); 644 #endif 645 fscrypt_free_inode(inode); 646 kmem_cache_free(ceph_inode_cachep, ci); 647 } 648 649 void ceph_evict_inode(struct inode *inode) 650 { 651 struct ceph_inode_info *ci = ceph_inode(inode); 652 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 653 struct ceph_inode_frag *frag; 654 struct rb_node *n; 655 656 dout("evict_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); 657 658 percpu_counter_dec(&mdsc->metric.total_inodes); 659 660 truncate_inode_pages_final(&inode->i_data); 661 if (inode->i_state & I_PINNING_FSCACHE_WB) 662 ceph_fscache_unuse_cookie(inode, true); 663 clear_inode(inode); 664 665 ceph_fscache_unregister_inode_cookie(ci); 666 fscrypt_put_encryption_info(inode); 667 668 __ceph_remove_caps(ci); 669 670 if (__ceph_has_quota(ci, QUOTA_GET_ANY)) 671 ceph_adjust_quota_realms_count(inode, false); 672 673 /* 674 * we may still have a snap_realm reference if there are stray 675 * caps in i_snap_caps. 676 */ 677 if (ci->i_snap_realm) { 678 if (ceph_snap(inode) == CEPH_NOSNAP) { 679 dout(" dropping residual ref to snap realm %p\n", 680 ci->i_snap_realm); 681 ceph_change_snap_realm(inode, NULL); 682 } else { 683 ceph_put_snapid_map(mdsc, ci->i_snapid_map); 684 ci->i_snap_realm = NULL; 685 } 686 } 687 688 while ((n = rb_first(&ci->i_fragtree)) != NULL) { 689 frag = rb_entry(n, struct ceph_inode_frag, node); 690 rb_erase(n, &ci->i_fragtree); 691 kfree(frag); 692 } 693 ci->i_fragtree_nsplits = 0; 694 695 __ceph_destroy_xattrs(ci); 696 if (ci->i_xattrs.blob) 697 ceph_buffer_put(ci->i_xattrs.blob); 698 if (ci->i_xattrs.prealloc_blob) 699 ceph_buffer_put(ci->i_xattrs.prealloc_blob); 700 701 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns)); 702 ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns)); 703 } 704 705 static inline blkcnt_t calc_inode_blocks(u64 size) 706 { 707 return (size + (1<<9) - 1) >> 9; 708 } 709 710 /* 711 * Helpers to fill in size, ctime, mtime, and atime. We have to be 712 * careful because either the client or MDS may have more up to date 713 * info, depending on which capabilities are held, and whether 714 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime 715 * and size are monotonically increasing, except when utimes() or 716 * truncate() increments the corresponding _seq values.) 717 */ 718 int ceph_fill_file_size(struct inode *inode, int issued, 719 u32 truncate_seq, u64 truncate_size, u64 size) 720 { 721 struct ceph_inode_info *ci = ceph_inode(inode); 722 int queue_trunc = 0; 723 loff_t isize = i_size_read(inode); 724 725 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || 726 (truncate_seq == ci->i_truncate_seq && size > isize)) { 727 dout("size %lld -> %llu\n", isize, size); 728 if (size > 0 && S_ISDIR(inode->i_mode)) { 729 pr_err("fill_file_size non-zero size for directory\n"); 730 size = 0; 731 } 732 i_size_write(inode, size); 733 inode->i_blocks = calc_inode_blocks(size); 734 /* 735 * If we're expanding, then we should be able to just update 736 * the existing cookie. 737 */ 738 if (size > isize) 739 ceph_fscache_update(inode); 740 ci->i_reported_size = size; 741 if (truncate_seq != ci->i_truncate_seq) { 742 dout("truncate_seq %u -> %u\n", 743 ci->i_truncate_seq, truncate_seq); 744 ci->i_truncate_seq = truncate_seq; 745 746 /* the MDS should have revoked these caps */ 747 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL | 748 CEPH_CAP_FILE_RD | 749 CEPH_CAP_FILE_WR | 750 CEPH_CAP_FILE_LAZYIO)); 751 /* 752 * If we hold relevant caps, or in the case where we're 753 * not the only client referencing this file and we 754 * don't hold those caps, then we need to check whether 755 * the file is either opened or mmaped 756 */ 757 if ((issued & (CEPH_CAP_FILE_CACHE| 758 CEPH_CAP_FILE_BUFFER)) || 759 mapping_mapped(inode->i_mapping) || 760 __ceph_is_file_opened(ci)) { 761 ci->i_truncate_pending++; 762 queue_trunc = 1; 763 } 764 } 765 } 766 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && 767 ci->i_truncate_size != truncate_size) { 768 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, 769 truncate_size); 770 ci->i_truncate_size = truncate_size; 771 if (IS_ENCRYPTED(inode)) 772 ci->i_truncate_pagecache_size = size; 773 else 774 ci->i_truncate_pagecache_size = truncate_size; 775 } 776 return queue_trunc; 777 } 778 779 void ceph_fill_file_time(struct inode *inode, int issued, 780 u64 time_warp_seq, struct timespec64 *ctime, 781 struct timespec64 *mtime, struct timespec64 *atime) 782 { 783 struct ceph_inode_info *ci = ceph_inode(inode); 784 int warn = 0; 785 786 if (issued & (CEPH_CAP_FILE_EXCL| 787 CEPH_CAP_FILE_WR| 788 CEPH_CAP_FILE_BUFFER| 789 CEPH_CAP_AUTH_EXCL| 790 CEPH_CAP_XATTR_EXCL)) { 791 if (ci->i_version == 0 || 792 timespec64_compare(ctime, &inode->i_ctime) > 0) { 793 dout("ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n", 794 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 795 ctime->tv_sec, ctime->tv_nsec); 796 inode->i_ctime = *ctime; 797 } 798 if (ci->i_version == 0 || 799 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { 800 /* the MDS did a utimes() */ 801 dout("mtime %lld.%09ld -> %lld.%09ld " 802 "tw %d -> %d\n", 803 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 804 mtime->tv_sec, mtime->tv_nsec, 805 ci->i_time_warp_seq, (int)time_warp_seq); 806 807 inode->i_mtime = *mtime; 808 inode->i_atime = *atime; 809 ci->i_time_warp_seq = time_warp_seq; 810 } else if (time_warp_seq == ci->i_time_warp_seq) { 811 /* nobody did utimes(); take the max */ 812 if (timespec64_compare(mtime, &inode->i_mtime) > 0) { 813 dout("mtime %lld.%09ld -> %lld.%09ld inc\n", 814 inode->i_mtime.tv_sec, 815 inode->i_mtime.tv_nsec, 816 mtime->tv_sec, mtime->tv_nsec); 817 inode->i_mtime = *mtime; 818 } 819 if (timespec64_compare(atime, &inode->i_atime) > 0) { 820 dout("atime %lld.%09ld -> %lld.%09ld inc\n", 821 inode->i_atime.tv_sec, 822 inode->i_atime.tv_nsec, 823 atime->tv_sec, atime->tv_nsec); 824 inode->i_atime = *atime; 825 } 826 } else if (issued & CEPH_CAP_FILE_EXCL) { 827 /* we did a utimes(); ignore mds values */ 828 } else { 829 warn = 1; 830 } 831 } else { 832 /* we have no write|excl caps; whatever the MDS says is true */ 833 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { 834 inode->i_ctime = *ctime; 835 inode->i_mtime = *mtime; 836 inode->i_atime = *atime; 837 ci->i_time_warp_seq = time_warp_seq; 838 } else { 839 warn = 1; 840 } 841 } 842 if (warn) /* time_warp_seq shouldn't go backwards */ 843 dout("%p mds time_warp_seq %llu < %u\n", 844 inode, time_warp_seq, ci->i_time_warp_seq); 845 } 846 847 #if IS_ENABLED(CONFIG_FS_ENCRYPTION) 848 static int decode_encrypted_symlink(const char *encsym, int enclen, u8 **decsym) 849 { 850 int declen; 851 u8 *sym; 852 853 sym = kmalloc(enclen + 1, GFP_NOFS); 854 if (!sym) 855 return -ENOMEM; 856 857 declen = ceph_base64_decode(encsym, enclen, sym); 858 if (declen < 0) { 859 pr_err("%s: can't decode symlink (%d). Content: %.*s\n", 860 __func__, declen, enclen, encsym); 861 kfree(sym); 862 return -EIO; 863 } 864 sym[declen + 1] = '\0'; 865 *decsym = sym; 866 return declen; 867 } 868 #else 869 static int decode_encrypted_symlink(const char *encsym, int symlen, u8 **decsym) 870 { 871 return -EOPNOTSUPP; 872 } 873 #endif 874 875 /* 876 * Populate an inode based on info from mds. May be called on new or 877 * existing inodes. 878 */ 879 int ceph_fill_inode(struct inode *inode, struct page *locked_page, 880 struct ceph_mds_reply_info_in *iinfo, 881 struct ceph_mds_reply_dirfrag *dirinfo, 882 struct ceph_mds_session *session, int cap_fmode, 883 struct ceph_cap_reservation *caps_reservation) 884 { 885 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 886 struct ceph_mds_reply_inode *info = iinfo->in; 887 struct ceph_inode_info *ci = ceph_inode(inode); 888 int issued, new_issued, info_caps; 889 struct timespec64 mtime, atime, ctime; 890 struct ceph_buffer *xattr_blob = NULL; 891 struct ceph_buffer *old_blob = NULL; 892 struct ceph_string *pool_ns = NULL; 893 struct ceph_cap *new_cap = NULL; 894 int err = 0; 895 bool wake = false; 896 bool queue_trunc = false; 897 bool new_version = false; 898 bool fill_inline = false; 899 umode_t mode = le32_to_cpu(info->mode); 900 dev_t rdev = le32_to_cpu(info->rdev); 901 902 lockdep_assert_held(&mdsc->snap_rwsem); 903 904 dout("%s %p ino %llx.%llx v %llu had %llu\n", __func__, 905 inode, ceph_vinop(inode), le64_to_cpu(info->version), 906 ci->i_version); 907 908 /* Once I_NEW is cleared, we can't change type or dev numbers */ 909 if (inode->i_state & I_NEW) { 910 inode->i_mode = mode; 911 } else { 912 if (inode_wrong_type(inode, mode)) { 913 pr_warn_once("inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n", 914 ceph_vinop(inode), inode->i_mode, mode); 915 return -ESTALE; 916 } 917 918 if ((S_ISCHR(mode) || S_ISBLK(mode)) && inode->i_rdev != rdev) { 919 pr_warn_once("dev inode rdev changed! (ino %llx.%llx is %u:%u, mds says %u:%u)\n", 920 ceph_vinop(inode), MAJOR(inode->i_rdev), 921 MINOR(inode->i_rdev), MAJOR(rdev), 922 MINOR(rdev)); 923 return -ESTALE; 924 } 925 } 926 927 info_caps = le32_to_cpu(info->cap.caps); 928 929 /* prealloc new cap struct */ 930 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) { 931 new_cap = ceph_get_cap(mdsc, caps_reservation); 932 if (!new_cap) 933 return -ENOMEM; 934 } 935 936 /* 937 * prealloc xattr data, if it looks like we'll need it. only 938 * if len > 4 (meaning there are actually xattrs; the first 4 939 * bytes are the xattr count). 940 */ 941 if (iinfo->xattr_len > 4) { 942 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); 943 if (!xattr_blob) 944 pr_err("%s ENOMEM xattr blob %d bytes\n", __func__, 945 iinfo->xattr_len); 946 } 947 948 if (iinfo->pool_ns_len > 0) 949 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data, 950 iinfo->pool_ns_len); 951 952 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map) 953 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode)); 954 955 spin_lock(&ci->i_ceph_lock); 956 957 /* 958 * provided version will be odd if inode value is projected, 959 * even if stable. skip the update if we have newer stable 960 * info (ours>=theirs, e.g. due to racing mds replies), unless 961 * we are getting projected (unstable) info (in which case the 962 * version is odd, and we want ours>theirs). 963 * us them 964 * 2 2 skip 965 * 3 2 skip 966 * 3 3 update 967 */ 968 if (ci->i_version == 0 || 969 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 970 le64_to_cpu(info->version) > (ci->i_version & ~1))) 971 new_version = true; 972 973 /* Update change_attribute */ 974 inode_set_max_iversion_raw(inode, iinfo->change_attr); 975 976 __ceph_caps_issued(ci, &issued); 977 issued |= __ceph_caps_dirty(ci); 978 new_issued = ~issued & info_caps; 979 980 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files); 981 982 #ifdef CONFIG_FS_ENCRYPTION 983 if (iinfo->fscrypt_auth_len && 984 ((inode->i_state & I_NEW) || (ci->fscrypt_auth_len == 0))) { 985 kfree(ci->fscrypt_auth); 986 ci->fscrypt_auth_len = iinfo->fscrypt_auth_len; 987 ci->fscrypt_auth = iinfo->fscrypt_auth; 988 iinfo->fscrypt_auth = NULL; 989 iinfo->fscrypt_auth_len = 0; 990 inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED); 991 } 992 #endif 993 994 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && 995 (issued & CEPH_CAP_AUTH_EXCL) == 0) { 996 inode->i_mode = mode; 997 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); 998 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); 999 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, 1000 from_kuid(&init_user_ns, inode->i_uid), 1001 from_kgid(&init_user_ns, inode->i_gid)); 1002 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime); 1003 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime); 1004 } 1005 1006 /* directories have fl_stripe_unit set to zero */ 1007 if (IS_ENCRYPTED(inode)) 1008 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT; 1009 else if (le32_to_cpu(info->layout.fl_stripe_unit)) 1010 inode->i_blkbits = 1011 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; 1012 else 1013 inode->i_blkbits = CEPH_BLOCK_SHIFT; 1014 1015 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && 1016 (issued & CEPH_CAP_LINK_EXCL) == 0) 1017 set_nlink(inode, le32_to_cpu(info->nlink)); 1018 1019 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { 1020 /* be careful with mtime, atime, size */ 1021 ceph_decode_timespec64(&atime, &info->atime); 1022 ceph_decode_timespec64(&mtime, &info->mtime); 1023 ceph_decode_timespec64(&ctime, &info->ctime); 1024 ceph_fill_file_time(inode, issued, 1025 le32_to_cpu(info->time_warp_seq), 1026 &ctime, &mtime, &atime); 1027 } 1028 1029 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) { 1030 ci->i_files = le64_to_cpu(info->files); 1031 ci->i_subdirs = le64_to_cpu(info->subdirs); 1032 } 1033 1034 if (new_version || 1035 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { 1036 u64 size = le64_to_cpu(info->size); 1037 s64 old_pool = ci->i_layout.pool_id; 1038 struct ceph_string *old_ns; 1039 1040 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout); 1041 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, 1042 lockdep_is_held(&ci->i_ceph_lock)); 1043 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns); 1044 1045 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns) 1046 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; 1047 1048 pool_ns = old_ns; 1049 1050 if (IS_ENCRYPTED(inode) && size && 1051 iinfo->fscrypt_file_len == sizeof(__le64)) { 1052 u64 fsize = __le64_to_cpu(*(__le64 *)iinfo->fscrypt_file); 1053 1054 if (size == round_up(fsize, CEPH_FSCRYPT_BLOCK_SIZE)) { 1055 size = fsize; 1056 } else { 1057 pr_warn("fscrypt size mismatch: size=%llu fscrypt_file=%llu, discarding fscrypt_file size.\n", 1058 info->size, size); 1059 } 1060 } 1061 1062 queue_trunc = ceph_fill_file_size(inode, issued, 1063 le32_to_cpu(info->truncate_seq), 1064 le64_to_cpu(info->truncate_size), 1065 size); 1066 /* only update max_size on auth cap */ 1067 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 1068 ci->i_max_size != le64_to_cpu(info->max_size)) { 1069 dout("max_size %lld -> %llu\n", ci->i_max_size, 1070 le64_to_cpu(info->max_size)); 1071 ci->i_max_size = le64_to_cpu(info->max_size); 1072 } 1073 } 1074 1075 /* layout and rstat are not tracked by capability, update them if 1076 * the inode info is from auth mds */ 1077 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) { 1078 if (S_ISDIR(inode->i_mode)) { 1079 ci->i_dir_layout = iinfo->dir_layout; 1080 ci->i_rbytes = le64_to_cpu(info->rbytes); 1081 ci->i_rfiles = le64_to_cpu(info->rfiles); 1082 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); 1083 ci->i_dir_pin = iinfo->dir_pin; 1084 ci->i_rsnaps = iinfo->rsnaps; 1085 ceph_decode_timespec64(&ci->i_rctime, &info->rctime); 1086 } 1087 } 1088 1089 /* xattrs */ 1090 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ 1091 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && 1092 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { 1093 if (ci->i_xattrs.blob) 1094 old_blob = ci->i_xattrs.blob; 1095 ci->i_xattrs.blob = xattr_blob; 1096 if (xattr_blob) 1097 memcpy(ci->i_xattrs.blob->vec.iov_base, 1098 iinfo->xattr_data, iinfo->xattr_len); 1099 ci->i_xattrs.version = le64_to_cpu(info->xattr_version); 1100 ceph_forget_all_cached_acls(inode); 1101 ceph_security_invalidate_secctx(inode); 1102 xattr_blob = NULL; 1103 } 1104 1105 /* finally update i_version */ 1106 if (le64_to_cpu(info->version) > ci->i_version) 1107 ci->i_version = le64_to_cpu(info->version); 1108 1109 inode->i_mapping->a_ops = &ceph_aops; 1110 1111 switch (inode->i_mode & S_IFMT) { 1112 case S_IFIFO: 1113 case S_IFBLK: 1114 case S_IFCHR: 1115 case S_IFSOCK: 1116 inode->i_blkbits = PAGE_SHIFT; 1117 init_special_inode(inode, inode->i_mode, rdev); 1118 inode->i_op = &ceph_file_iops; 1119 break; 1120 case S_IFREG: 1121 inode->i_op = &ceph_file_iops; 1122 inode->i_fop = &ceph_file_fops; 1123 break; 1124 case S_IFLNK: 1125 if (!ci->i_symlink) { 1126 u32 symlen = iinfo->symlink_len; 1127 char *sym; 1128 1129 spin_unlock(&ci->i_ceph_lock); 1130 1131 if (IS_ENCRYPTED(inode)) { 1132 if (symlen != i_size_read(inode)) 1133 pr_err("%s %llx.%llx BAD symlink size %lld\n", 1134 __func__, ceph_vinop(inode), 1135 i_size_read(inode)); 1136 1137 err = decode_encrypted_symlink(iinfo->symlink, 1138 symlen, (u8 **)&sym); 1139 if (err < 0) { 1140 pr_err("%s decoding encrypted symlink failed: %d\n", 1141 __func__, err); 1142 goto out; 1143 } 1144 symlen = err; 1145 i_size_write(inode, symlen); 1146 inode->i_blocks = calc_inode_blocks(symlen); 1147 } else { 1148 if (symlen != i_size_read(inode)) { 1149 pr_err("%s %llx.%llx BAD symlink size %lld\n", 1150 __func__, ceph_vinop(inode), 1151 i_size_read(inode)); 1152 i_size_write(inode, symlen); 1153 inode->i_blocks = calc_inode_blocks(symlen); 1154 } 1155 1156 err = -ENOMEM; 1157 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); 1158 if (!sym) 1159 goto out; 1160 } 1161 1162 spin_lock(&ci->i_ceph_lock); 1163 if (!ci->i_symlink) 1164 ci->i_symlink = sym; 1165 else 1166 kfree(sym); /* lost a race */ 1167 } 1168 1169 if (IS_ENCRYPTED(inode)) { 1170 /* 1171 * Encrypted symlinks need to be decrypted before we can 1172 * cache their targets in i_link. Don't touch it here. 1173 */ 1174 inode->i_op = &ceph_encrypted_symlink_iops; 1175 } else { 1176 inode->i_link = ci->i_symlink; 1177 inode->i_op = &ceph_symlink_iops; 1178 } 1179 break; 1180 case S_IFDIR: 1181 inode->i_op = &ceph_dir_iops; 1182 inode->i_fop = &ceph_dir_fops; 1183 break; 1184 default: 1185 pr_err("%s %llx.%llx BAD mode 0%o\n", __func__, 1186 ceph_vinop(inode), inode->i_mode); 1187 } 1188 1189 /* were we issued a capability? */ 1190 if (info_caps) { 1191 if (ceph_snap(inode) == CEPH_NOSNAP) { 1192 ceph_add_cap(inode, session, 1193 le64_to_cpu(info->cap.cap_id), 1194 info_caps, 1195 le32_to_cpu(info->cap.wanted), 1196 le32_to_cpu(info->cap.seq), 1197 le32_to_cpu(info->cap.mseq), 1198 le64_to_cpu(info->cap.realm), 1199 info->cap.flags, &new_cap); 1200 1201 /* set dir completion flag? */ 1202 if (S_ISDIR(inode->i_mode) && 1203 ci->i_files == 0 && ci->i_subdirs == 0 && 1204 (info_caps & CEPH_CAP_FILE_SHARED) && 1205 (issued & CEPH_CAP_FILE_EXCL) == 0 && 1206 !__ceph_dir_is_complete(ci)) { 1207 dout(" marking %p complete (empty)\n", inode); 1208 i_size_write(inode, 0); 1209 __ceph_dir_set_complete(ci, 1210 atomic64_read(&ci->i_release_count), 1211 atomic64_read(&ci->i_ordered_count)); 1212 } 1213 1214 wake = true; 1215 } else { 1216 dout(" %p got snap_caps %s\n", inode, 1217 ceph_cap_string(info_caps)); 1218 ci->i_snap_caps |= info_caps; 1219 } 1220 } 1221 1222 if (iinfo->inline_version > 0 && 1223 iinfo->inline_version >= ci->i_inline_version) { 1224 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; 1225 ci->i_inline_version = iinfo->inline_version; 1226 if (ceph_has_inline_data(ci) && 1227 (locked_page || (info_caps & cache_caps))) 1228 fill_inline = true; 1229 } 1230 1231 if (cap_fmode >= 0) { 1232 if (!info_caps) 1233 pr_warn("mds issued no caps on %llx.%llx\n", 1234 ceph_vinop(inode)); 1235 __ceph_touch_fmode(ci, mdsc, cap_fmode); 1236 } 1237 1238 spin_unlock(&ci->i_ceph_lock); 1239 1240 ceph_fscache_register_inode_cookie(inode); 1241 1242 if (fill_inline) 1243 ceph_fill_inline_data(inode, locked_page, 1244 iinfo->inline_data, iinfo->inline_len); 1245 1246 if (wake) 1247 wake_up_all(&ci->i_cap_wq); 1248 1249 /* queue truncate if we saw i_size decrease */ 1250 if (queue_trunc) 1251 ceph_queue_vmtruncate(inode); 1252 1253 /* populate frag tree */ 1254 if (S_ISDIR(inode->i_mode)) 1255 ceph_fill_fragtree(inode, &info->fragtree, dirinfo); 1256 1257 /* update delegation info? */ 1258 if (dirinfo) 1259 ceph_fill_dirfrag(inode, dirinfo); 1260 1261 err = 0; 1262 out: 1263 if (new_cap) 1264 ceph_put_cap(mdsc, new_cap); 1265 ceph_buffer_put(old_blob); 1266 ceph_buffer_put(xattr_blob); 1267 ceph_put_string(pool_ns); 1268 return err; 1269 } 1270 1271 /* 1272 * caller should hold session s_mutex and dentry->d_lock. 1273 */ 1274 static void __update_dentry_lease(struct inode *dir, struct dentry *dentry, 1275 struct ceph_mds_reply_lease *lease, 1276 struct ceph_mds_session *session, 1277 unsigned long from_time, 1278 struct ceph_mds_session **old_lease_session) 1279 { 1280 struct ceph_dentry_info *di = ceph_dentry(dentry); 1281 unsigned mask = le16_to_cpu(lease->mask); 1282 long unsigned duration = le32_to_cpu(lease->duration_ms); 1283 long unsigned ttl = from_time + (duration * HZ) / 1000; 1284 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; 1285 1286 dout("update_dentry_lease %p duration %lu ms ttl %lu\n", 1287 dentry, duration, ttl); 1288 1289 /* only track leases on regular dentries */ 1290 if (ceph_snap(dir) != CEPH_NOSNAP) 1291 return; 1292 1293 if (mask & CEPH_LEASE_PRIMARY_LINK) 1294 di->flags |= CEPH_DENTRY_PRIMARY_LINK; 1295 else 1296 di->flags &= ~CEPH_DENTRY_PRIMARY_LINK; 1297 1298 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen); 1299 if (!(mask & CEPH_LEASE_VALID)) { 1300 __ceph_dentry_dir_lease_touch(di); 1301 return; 1302 } 1303 1304 if (di->lease_gen == atomic_read(&session->s_cap_gen) && 1305 time_before(ttl, di->time)) 1306 return; /* we already have a newer lease. */ 1307 1308 if (di->lease_session && di->lease_session != session) { 1309 *old_lease_session = di->lease_session; 1310 di->lease_session = NULL; 1311 } 1312 1313 if (!di->lease_session) 1314 di->lease_session = ceph_get_mds_session(session); 1315 di->lease_gen = atomic_read(&session->s_cap_gen); 1316 di->lease_seq = le32_to_cpu(lease->seq); 1317 di->lease_renew_after = half_ttl; 1318 di->lease_renew_from = 0; 1319 di->time = ttl; 1320 1321 __ceph_dentry_lease_touch(di); 1322 } 1323 1324 static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry, 1325 struct ceph_mds_reply_lease *lease, 1326 struct ceph_mds_session *session, 1327 unsigned long from_time) 1328 { 1329 struct ceph_mds_session *old_lease_session = NULL; 1330 spin_lock(&dentry->d_lock); 1331 __update_dentry_lease(dir, dentry, lease, session, from_time, 1332 &old_lease_session); 1333 spin_unlock(&dentry->d_lock); 1334 ceph_put_mds_session(old_lease_session); 1335 } 1336 1337 /* 1338 * update dentry lease without having parent inode locked 1339 */ 1340 static void update_dentry_lease_careful(struct dentry *dentry, 1341 struct ceph_mds_reply_lease *lease, 1342 struct ceph_mds_session *session, 1343 unsigned long from_time, 1344 char *dname, u32 dname_len, 1345 struct ceph_vino *pdvino, 1346 struct ceph_vino *ptvino) 1347 1348 { 1349 struct inode *dir; 1350 struct ceph_mds_session *old_lease_session = NULL; 1351 1352 spin_lock(&dentry->d_lock); 1353 /* make sure dentry's name matches target */ 1354 if (dentry->d_name.len != dname_len || 1355 memcmp(dentry->d_name.name, dname, dname_len)) 1356 goto out_unlock; 1357 1358 dir = d_inode(dentry->d_parent); 1359 /* make sure parent matches dvino */ 1360 if (!ceph_ino_compare(dir, pdvino)) 1361 goto out_unlock; 1362 1363 /* make sure dentry's inode matches target. NULL ptvino means that 1364 * we expect a negative dentry */ 1365 if (ptvino) { 1366 if (d_really_is_negative(dentry)) 1367 goto out_unlock; 1368 if (!ceph_ino_compare(d_inode(dentry), ptvino)) 1369 goto out_unlock; 1370 } else { 1371 if (d_really_is_positive(dentry)) 1372 goto out_unlock; 1373 } 1374 1375 __update_dentry_lease(dir, dentry, lease, session, 1376 from_time, &old_lease_session); 1377 out_unlock: 1378 spin_unlock(&dentry->d_lock); 1379 ceph_put_mds_session(old_lease_session); 1380 } 1381 1382 /* 1383 * splice a dentry to an inode. 1384 * caller must hold directory i_rwsem for this to be safe. 1385 */ 1386 static int splice_dentry(struct dentry **pdn, struct inode *in) 1387 { 1388 struct dentry *dn = *pdn; 1389 struct dentry *realdn; 1390 1391 BUG_ON(d_inode(dn)); 1392 1393 if (S_ISDIR(in->i_mode)) { 1394 /* If inode is directory, d_splice_alias() below will remove 1395 * 'realdn' from its origin parent. We need to ensure that 1396 * origin parent's readdir cache will not reference 'realdn' 1397 */ 1398 realdn = d_find_any_alias(in); 1399 if (realdn) { 1400 struct ceph_dentry_info *di = ceph_dentry(realdn); 1401 spin_lock(&realdn->d_lock); 1402 1403 realdn->d_op->d_prune(realdn); 1404 1405 di->time = jiffies; 1406 di->lease_shared_gen = 0; 1407 di->offset = 0; 1408 1409 spin_unlock(&realdn->d_lock); 1410 dput(realdn); 1411 } 1412 } 1413 1414 /* dn must be unhashed */ 1415 if (!d_unhashed(dn)) 1416 d_drop(dn); 1417 realdn = d_splice_alias(in, dn); 1418 if (IS_ERR(realdn)) { 1419 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", 1420 PTR_ERR(realdn), dn, in, ceph_vinop(in)); 1421 return PTR_ERR(realdn); 1422 } 1423 1424 if (realdn) { 1425 dout("dn %p (%d) spliced with %p (%d) " 1426 "inode %p ino %llx.%llx\n", 1427 dn, d_count(dn), 1428 realdn, d_count(realdn), 1429 d_inode(realdn), ceph_vinop(d_inode(realdn))); 1430 dput(dn); 1431 *pdn = realdn; 1432 } else { 1433 BUG_ON(!ceph_dentry(dn)); 1434 dout("dn %p attached to %p ino %llx.%llx\n", 1435 dn, d_inode(dn), ceph_vinop(d_inode(dn))); 1436 } 1437 return 0; 1438 } 1439 1440 /* 1441 * Incorporate results into the local cache. This is either just 1442 * one inode, or a directory, dentry, and possibly linked-to inode (e.g., 1443 * after a lookup). 1444 * 1445 * A reply may contain 1446 * a directory inode along with a dentry. 1447 * and/or a target inode 1448 * 1449 * Called with snap_rwsem (read). 1450 */ 1451 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) 1452 { 1453 struct ceph_mds_session *session = req->r_session; 1454 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1455 struct inode *in = NULL; 1456 struct ceph_vino tvino, dvino; 1457 struct ceph_fs_client *fsc = ceph_sb_to_client(sb); 1458 int err = 0; 1459 1460 dout("fill_trace %p is_dentry %d is_target %d\n", req, 1461 rinfo->head->is_dentry, rinfo->head->is_target); 1462 1463 if (!rinfo->head->is_target && !rinfo->head->is_dentry) { 1464 dout("fill_trace reply is empty!\n"); 1465 if (rinfo->head->result == 0 && req->r_parent) 1466 ceph_invalidate_dir_request(req); 1467 return 0; 1468 } 1469 1470 if (rinfo->head->is_dentry) { 1471 struct inode *dir = req->r_parent; 1472 1473 if (dir) { 1474 err = ceph_fill_inode(dir, NULL, &rinfo->diri, 1475 rinfo->dirfrag, session, -1, 1476 &req->r_caps_reservation); 1477 if (err < 0) 1478 goto done; 1479 } else { 1480 WARN_ON_ONCE(1); 1481 } 1482 1483 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME && 1484 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1485 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1486 bool is_nokey = false; 1487 struct qstr dname; 1488 struct dentry *dn, *parent; 1489 struct fscrypt_str oname = FSTR_INIT(NULL, 0); 1490 struct ceph_fname fname = { .dir = dir, 1491 .name = rinfo->dname, 1492 .ctext = rinfo->altname, 1493 .name_len = rinfo->dname_len, 1494 .ctext_len = rinfo->altname_len }; 1495 1496 BUG_ON(!rinfo->head->is_target); 1497 BUG_ON(req->r_dentry); 1498 1499 parent = d_find_any_alias(dir); 1500 BUG_ON(!parent); 1501 1502 err = ceph_fname_alloc_buffer(dir, &oname); 1503 if (err < 0) { 1504 dput(parent); 1505 goto done; 1506 } 1507 1508 err = ceph_fname_to_usr(&fname, NULL, &oname, &is_nokey); 1509 if (err < 0) { 1510 dput(parent); 1511 ceph_fname_free_buffer(dir, &oname); 1512 goto done; 1513 } 1514 dname.name = oname.name; 1515 dname.len = oname.len; 1516 dname.hash = full_name_hash(parent, dname.name, dname.len); 1517 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1518 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1519 retry_lookup: 1520 dn = d_lookup(parent, &dname); 1521 dout("d_lookup on parent=%p name=%.*s got %p\n", 1522 parent, dname.len, dname.name, dn); 1523 1524 if (!dn) { 1525 dn = d_alloc(parent, &dname); 1526 dout("d_alloc %p '%.*s' = %p\n", parent, 1527 dname.len, dname.name, dn); 1528 if (!dn) { 1529 dput(parent); 1530 ceph_fname_free_buffer(dir, &oname); 1531 err = -ENOMEM; 1532 goto done; 1533 } 1534 if (is_nokey) { 1535 spin_lock(&dn->d_lock); 1536 dn->d_flags |= DCACHE_NOKEY_NAME; 1537 spin_unlock(&dn->d_lock); 1538 } 1539 err = 0; 1540 } else if (d_really_is_positive(dn) && 1541 (ceph_ino(d_inode(dn)) != tvino.ino || 1542 ceph_snap(d_inode(dn)) != tvino.snap)) { 1543 dout(" dn %p points to wrong inode %p\n", 1544 dn, d_inode(dn)); 1545 ceph_dir_clear_ordered(dir); 1546 d_delete(dn); 1547 dput(dn); 1548 goto retry_lookup; 1549 } 1550 ceph_fname_free_buffer(dir, &oname); 1551 1552 req->r_dentry = dn; 1553 dput(parent); 1554 } 1555 } 1556 1557 if (rinfo->head->is_target) { 1558 /* Should be filled in by handle_reply */ 1559 BUG_ON(!req->r_target_inode); 1560 1561 in = req->r_target_inode; 1562 err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti, 1563 NULL, session, 1564 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1565 !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) && 1566 rinfo->head->result == 0) ? req->r_fmode : -1, 1567 &req->r_caps_reservation); 1568 if (err < 0) { 1569 pr_err("ceph_fill_inode badness %p %llx.%llx\n", 1570 in, ceph_vinop(in)); 1571 req->r_target_inode = NULL; 1572 if (in->i_state & I_NEW) 1573 discard_new_inode(in); 1574 else 1575 iput(in); 1576 goto done; 1577 } 1578 if (in->i_state & I_NEW) 1579 unlock_new_inode(in); 1580 } 1581 1582 /* 1583 * ignore null lease/binding on snapdir ENOENT, or else we 1584 * will have trouble splicing in the virtual snapdir later 1585 */ 1586 if (rinfo->head->is_dentry && 1587 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1588 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1589 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, 1590 fsc->mount_options->snapdir_name, 1591 req->r_dentry->d_name.len))) { 1592 /* 1593 * lookup link rename : null -> possibly existing inode 1594 * mknod symlink mkdir : null -> new inode 1595 * unlink : linked -> null 1596 */ 1597 struct inode *dir = req->r_parent; 1598 struct dentry *dn = req->r_dentry; 1599 bool have_dir_cap, have_lease; 1600 1601 BUG_ON(!dn); 1602 BUG_ON(!dir); 1603 BUG_ON(d_inode(dn->d_parent) != dir); 1604 1605 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1606 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1607 1608 BUG_ON(ceph_ino(dir) != dvino.ino); 1609 BUG_ON(ceph_snap(dir) != dvino.snap); 1610 1611 /* do we have a lease on the whole dir? */ 1612 have_dir_cap = 1613 (le32_to_cpu(rinfo->diri.in->cap.caps) & 1614 CEPH_CAP_FILE_SHARED); 1615 1616 /* do we have a dn lease? */ 1617 have_lease = have_dir_cap || 1618 le32_to_cpu(rinfo->dlease->duration_ms); 1619 if (!have_lease) 1620 dout("fill_trace no dentry lease or dir cap\n"); 1621 1622 /* rename? */ 1623 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { 1624 struct inode *olddir = req->r_old_dentry_dir; 1625 BUG_ON(!olddir); 1626 1627 dout(" src %p '%pd' dst %p '%pd'\n", 1628 req->r_old_dentry, 1629 req->r_old_dentry, 1630 dn, dn); 1631 dout("fill_trace doing d_move %p -> %p\n", 1632 req->r_old_dentry, dn); 1633 1634 /* d_move screws up sibling dentries' offsets */ 1635 ceph_dir_clear_ordered(dir); 1636 ceph_dir_clear_ordered(olddir); 1637 1638 d_move(req->r_old_dentry, dn); 1639 dout(" src %p '%pd' dst %p '%pd'\n", 1640 req->r_old_dentry, 1641 req->r_old_dentry, 1642 dn, dn); 1643 1644 /* ensure target dentry is invalidated, despite 1645 rehashing bug in vfs_rename_dir */ 1646 ceph_invalidate_dentry_lease(dn); 1647 1648 dout("dn %p gets new offset %lld\n", req->r_old_dentry, 1649 ceph_dentry(req->r_old_dentry)->offset); 1650 1651 /* swap r_dentry and r_old_dentry in case that 1652 * splice_dentry() gets called later. This is safe 1653 * because no other place will use them */ 1654 req->r_dentry = req->r_old_dentry; 1655 req->r_old_dentry = dn; 1656 dn = req->r_dentry; 1657 } 1658 1659 /* null dentry? */ 1660 if (!rinfo->head->is_target) { 1661 dout("fill_trace null dentry\n"); 1662 if (d_really_is_positive(dn)) { 1663 dout("d_delete %p\n", dn); 1664 ceph_dir_clear_ordered(dir); 1665 d_delete(dn); 1666 } else if (have_lease) { 1667 if (d_unhashed(dn)) 1668 d_add(dn, NULL); 1669 } 1670 1671 if (!d_unhashed(dn) && have_lease) 1672 update_dentry_lease(dir, dn, 1673 rinfo->dlease, session, 1674 req->r_request_started); 1675 goto done; 1676 } 1677 1678 /* attach proper inode */ 1679 if (d_really_is_negative(dn)) { 1680 ceph_dir_clear_ordered(dir); 1681 ihold(in); 1682 err = splice_dentry(&req->r_dentry, in); 1683 if (err < 0) 1684 goto done; 1685 dn = req->r_dentry; /* may have spliced */ 1686 } else if (d_really_is_positive(dn) && d_inode(dn) != in) { 1687 dout(" %p links to %p %llx.%llx, not %llx.%llx\n", 1688 dn, d_inode(dn), ceph_vinop(d_inode(dn)), 1689 ceph_vinop(in)); 1690 d_invalidate(dn); 1691 have_lease = false; 1692 } 1693 1694 if (have_lease) { 1695 update_dentry_lease(dir, dn, 1696 rinfo->dlease, session, 1697 req->r_request_started); 1698 } 1699 dout(" final dn %p\n", dn); 1700 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || 1701 req->r_op == CEPH_MDS_OP_MKSNAP) && 1702 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1703 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1704 struct inode *dir = req->r_parent; 1705 1706 /* fill out a snapdir LOOKUPSNAP dentry */ 1707 BUG_ON(!dir); 1708 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); 1709 BUG_ON(!req->r_dentry); 1710 dout(" linking snapped dir %p to dn %p\n", in, req->r_dentry); 1711 ceph_dir_clear_ordered(dir); 1712 ihold(in); 1713 err = splice_dentry(&req->r_dentry, in); 1714 if (err < 0) 1715 goto done; 1716 } else if (rinfo->head->is_dentry && req->r_dentry) { 1717 /* parent inode is not locked, be carefull */ 1718 struct ceph_vino *ptvino = NULL; 1719 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1720 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1721 if (rinfo->head->is_target) { 1722 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1723 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1724 ptvino = &tvino; 1725 } 1726 update_dentry_lease_careful(req->r_dentry, rinfo->dlease, 1727 session, req->r_request_started, 1728 rinfo->dname, rinfo->dname_len, 1729 &dvino, ptvino); 1730 } 1731 done: 1732 dout("fill_trace done err=%d\n", err); 1733 return err; 1734 } 1735 1736 /* 1737 * Prepopulate our cache with readdir results, leases, etc. 1738 */ 1739 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, 1740 struct ceph_mds_session *session) 1741 { 1742 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1743 int i, err = 0; 1744 1745 for (i = 0; i < rinfo->dir_nr; i++) { 1746 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1747 struct ceph_vino vino; 1748 struct inode *in; 1749 int rc; 1750 1751 vino.ino = le64_to_cpu(rde->inode.in->ino); 1752 vino.snap = le64_to_cpu(rde->inode.in->snapid); 1753 1754 in = ceph_get_inode(req->r_dentry->d_sb, vino, NULL); 1755 if (IS_ERR(in)) { 1756 err = PTR_ERR(in); 1757 dout("new_inode badness got %d\n", err); 1758 continue; 1759 } 1760 rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 1761 -1, &req->r_caps_reservation); 1762 if (rc < 0) { 1763 pr_err("ceph_fill_inode badness on %p got %d\n", 1764 in, rc); 1765 err = rc; 1766 if (in->i_state & I_NEW) { 1767 ihold(in); 1768 discard_new_inode(in); 1769 } 1770 } else if (in->i_state & I_NEW) { 1771 unlock_new_inode(in); 1772 } 1773 1774 iput(in); 1775 } 1776 1777 return err; 1778 } 1779 1780 void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl) 1781 { 1782 if (ctl->page) { 1783 kunmap(ctl->page); 1784 put_page(ctl->page); 1785 ctl->page = NULL; 1786 } 1787 } 1788 1789 static int fill_readdir_cache(struct inode *dir, struct dentry *dn, 1790 struct ceph_readdir_cache_control *ctl, 1791 struct ceph_mds_request *req) 1792 { 1793 struct ceph_inode_info *ci = ceph_inode(dir); 1794 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*); 1795 unsigned idx = ctl->index % nsize; 1796 pgoff_t pgoff = ctl->index / nsize; 1797 1798 if (!ctl->page || pgoff != page_index(ctl->page)) { 1799 ceph_readdir_cache_release(ctl); 1800 if (idx == 0) 1801 ctl->page = grab_cache_page(&dir->i_data, pgoff); 1802 else 1803 ctl->page = find_lock_page(&dir->i_data, pgoff); 1804 if (!ctl->page) { 1805 ctl->index = -1; 1806 return idx == 0 ? -ENOMEM : 0; 1807 } 1808 /* reading/filling the cache are serialized by 1809 * i_rwsem, no need to use page lock */ 1810 unlock_page(ctl->page); 1811 ctl->dentries = kmap(ctl->page); 1812 if (idx == 0) 1813 memset(ctl->dentries, 0, PAGE_SIZE); 1814 } 1815 1816 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) && 1817 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) { 1818 dout("readdir cache dn %p idx %d\n", dn, ctl->index); 1819 ctl->dentries[idx] = dn; 1820 ctl->index++; 1821 } else { 1822 dout("disable readdir cache\n"); 1823 ctl->index = -1; 1824 } 1825 return 0; 1826 } 1827 1828 int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1829 struct ceph_mds_session *session) 1830 { 1831 struct dentry *parent = req->r_dentry; 1832 struct inode *inode = d_inode(parent); 1833 struct ceph_inode_info *ci = ceph_inode(inode); 1834 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1835 struct qstr dname; 1836 struct dentry *dn; 1837 struct inode *in; 1838 int err = 0, skipped = 0, ret, i; 1839 u32 frag = le32_to_cpu(req->r_args.readdir.frag); 1840 u32 last_hash = 0; 1841 u32 fpos_offset; 1842 struct ceph_readdir_cache_control cache_ctl = {}; 1843 1844 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) 1845 return readdir_prepopulate_inodes_only(req, session); 1846 1847 if (rinfo->hash_order) { 1848 if (req->r_path2) { 1849 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, 1850 req->r_path2, 1851 strlen(req->r_path2)); 1852 last_hash = ceph_frag_value(last_hash); 1853 } else if (rinfo->offset_hash) { 1854 /* mds understands offset_hash */ 1855 WARN_ON_ONCE(req->r_readdir_offset != 2); 1856 last_hash = le32_to_cpu(req->r_args.readdir.offset_hash); 1857 } 1858 } 1859 1860 if (rinfo->dir_dir && 1861 le32_to_cpu(rinfo->dir_dir->frag) != frag) { 1862 dout("readdir_prepopulate got new frag %x -> %x\n", 1863 frag, le32_to_cpu(rinfo->dir_dir->frag)); 1864 frag = le32_to_cpu(rinfo->dir_dir->frag); 1865 if (!rinfo->hash_order) 1866 req->r_readdir_offset = 2; 1867 } 1868 1869 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { 1870 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", 1871 rinfo->dir_nr, parent); 1872 } else { 1873 dout("readdir_prepopulate %d items under dn %p\n", 1874 rinfo->dir_nr, parent); 1875 if (rinfo->dir_dir) 1876 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir); 1877 1878 if (ceph_frag_is_leftmost(frag) && 1879 req->r_readdir_offset == 2 && 1880 !(rinfo->hash_order && last_hash)) { 1881 /* note dir version at start of readdir so we can 1882 * tell if any dentries get dropped */ 1883 req->r_dir_release_cnt = 1884 atomic64_read(&ci->i_release_count); 1885 req->r_dir_ordered_cnt = 1886 atomic64_read(&ci->i_ordered_count); 1887 req->r_readdir_cache_idx = 0; 1888 } 1889 } 1890 1891 cache_ctl.index = req->r_readdir_cache_idx; 1892 fpos_offset = req->r_readdir_offset; 1893 1894 /* FIXME: release caps/leases if error occurs */ 1895 for (i = 0; i < rinfo->dir_nr; i++) { 1896 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1897 struct ceph_vino tvino; 1898 1899 dname.name = rde->name; 1900 dname.len = rde->name_len; 1901 dname.hash = full_name_hash(parent, dname.name, dname.len); 1902 1903 tvino.ino = le64_to_cpu(rde->inode.in->ino); 1904 tvino.snap = le64_to_cpu(rde->inode.in->snapid); 1905 1906 if (rinfo->hash_order) { 1907 u32 hash = ceph_frag_value(rde->raw_hash); 1908 if (hash != last_hash) 1909 fpos_offset = 2; 1910 last_hash = hash; 1911 rde->offset = ceph_make_fpos(hash, fpos_offset++, true); 1912 } else { 1913 rde->offset = ceph_make_fpos(frag, fpos_offset++, false); 1914 } 1915 1916 retry_lookup: 1917 dn = d_lookup(parent, &dname); 1918 dout("d_lookup on parent=%p name=%.*s got %p\n", 1919 parent, dname.len, dname.name, dn); 1920 1921 if (!dn) { 1922 dn = d_alloc(parent, &dname); 1923 dout("d_alloc %p '%.*s' = %p\n", parent, 1924 dname.len, dname.name, dn); 1925 if (!dn) { 1926 dout("d_alloc badness\n"); 1927 err = -ENOMEM; 1928 goto out; 1929 } 1930 if (rde->is_nokey) { 1931 spin_lock(&dn->d_lock); 1932 dn->d_flags |= DCACHE_NOKEY_NAME; 1933 spin_unlock(&dn->d_lock); 1934 } 1935 } else if (d_really_is_positive(dn) && 1936 (ceph_ino(d_inode(dn)) != tvino.ino || 1937 ceph_snap(d_inode(dn)) != tvino.snap)) { 1938 struct ceph_dentry_info *di = ceph_dentry(dn); 1939 dout(" dn %p points to wrong inode %p\n", 1940 dn, d_inode(dn)); 1941 1942 spin_lock(&dn->d_lock); 1943 if (di->offset > 0 && 1944 di->lease_shared_gen == 1945 atomic_read(&ci->i_shared_gen)) { 1946 __ceph_dir_clear_ordered(ci); 1947 di->offset = 0; 1948 } 1949 spin_unlock(&dn->d_lock); 1950 1951 d_delete(dn); 1952 dput(dn); 1953 goto retry_lookup; 1954 } 1955 1956 /* inode */ 1957 if (d_really_is_positive(dn)) { 1958 in = d_inode(dn); 1959 } else { 1960 in = ceph_get_inode(parent->d_sb, tvino, NULL); 1961 if (IS_ERR(in)) { 1962 dout("new_inode badness\n"); 1963 d_drop(dn); 1964 dput(dn); 1965 err = PTR_ERR(in); 1966 goto out; 1967 } 1968 } 1969 1970 ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 1971 -1, &req->r_caps_reservation); 1972 if (ret < 0) { 1973 pr_err("ceph_fill_inode badness on %p\n", in); 1974 if (d_really_is_negative(dn)) { 1975 if (in->i_state & I_NEW) { 1976 ihold(in); 1977 discard_new_inode(in); 1978 } 1979 iput(in); 1980 } 1981 d_drop(dn); 1982 err = ret; 1983 goto next_item; 1984 } 1985 if (in->i_state & I_NEW) 1986 unlock_new_inode(in); 1987 1988 if (d_really_is_negative(dn)) { 1989 if (ceph_security_xattr_deadlock(in)) { 1990 dout(" skip splicing dn %p to inode %p" 1991 " (security xattr deadlock)\n", dn, in); 1992 iput(in); 1993 skipped++; 1994 goto next_item; 1995 } 1996 1997 err = splice_dentry(&dn, in); 1998 if (err < 0) 1999 goto next_item; 2000 } 2001 2002 ceph_dentry(dn)->offset = rde->offset; 2003 2004 update_dentry_lease(d_inode(parent), dn, 2005 rde->lease, req->r_session, 2006 req->r_request_started); 2007 2008 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) { 2009 ret = fill_readdir_cache(d_inode(parent), dn, 2010 &cache_ctl, req); 2011 if (ret < 0) 2012 err = ret; 2013 } 2014 next_item: 2015 dput(dn); 2016 } 2017 out: 2018 if (err == 0 && skipped == 0) { 2019 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags); 2020 req->r_readdir_cache_idx = cache_ctl.index; 2021 } 2022 ceph_readdir_cache_release(&cache_ctl); 2023 dout("readdir_prepopulate done\n"); 2024 return err; 2025 } 2026 2027 bool ceph_inode_set_size(struct inode *inode, loff_t size) 2028 { 2029 struct ceph_inode_info *ci = ceph_inode(inode); 2030 bool ret; 2031 2032 spin_lock(&ci->i_ceph_lock); 2033 dout("set_size %p %llu -> %llu\n", inode, i_size_read(inode), size); 2034 i_size_write(inode, size); 2035 ceph_fscache_update(inode); 2036 inode->i_blocks = calc_inode_blocks(size); 2037 2038 ret = __ceph_should_report_size(ci); 2039 2040 spin_unlock(&ci->i_ceph_lock); 2041 2042 return ret; 2043 } 2044 2045 void ceph_queue_inode_work(struct inode *inode, int work_bit) 2046 { 2047 struct ceph_fs_client *fsc = ceph_inode_to_client(inode); 2048 struct ceph_inode_info *ci = ceph_inode(inode); 2049 set_bit(work_bit, &ci->i_work_mask); 2050 2051 ihold(inode); 2052 if (queue_work(fsc->inode_wq, &ci->i_work)) { 2053 dout("queue_inode_work %p, mask=%lx\n", inode, ci->i_work_mask); 2054 } else { 2055 dout("queue_inode_work %p already queued, mask=%lx\n", 2056 inode, ci->i_work_mask); 2057 iput(inode); 2058 } 2059 } 2060 2061 static void ceph_do_invalidate_pages(struct inode *inode) 2062 { 2063 struct ceph_inode_info *ci = ceph_inode(inode); 2064 u32 orig_gen; 2065 int check = 0; 2066 2067 ceph_fscache_invalidate(inode, false); 2068 2069 mutex_lock(&ci->i_truncate_mutex); 2070 2071 if (ceph_inode_is_shutdown(inode)) { 2072 pr_warn_ratelimited("%s: inode %llx.%llx is shut down\n", 2073 __func__, ceph_vinop(inode)); 2074 mapping_set_error(inode->i_mapping, -EIO); 2075 truncate_pagecache(inode, 0); 2076 mutex_unlock(&ci->i_truncate_mutex); 2077 goto out; 2078 } 2079 2080 spin_lock(&ci->i_ceph_lock); 2081 dout("invalidate_pages %p gen %d revoking %d\n", inode, 2082 ci->i_rdcache_gen, ci->i_rdcache_revoking); 2083 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { 2084 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2085 check = 1; 2086 spin_unlock(&ci->i_ceph_lock); 2087 mutex_unlock(&ci->i_truncate_mutex); 2088 goto out; 2089 } 2090 orig_gen = ci->i_rdcache_gen; 2091 spin_unlock(&ci->i_ceph_lock); 2092 2093 if (invalidate_inode_pages2(inode->i_mapping) < 0) { 2094 pr_err("invalidate_inode_pages2 %llx.%llx failed\n", 2095 ceph_vinop(inode)); 2096 } 2097 2098 spin_lock(&ci->i_ceph_lock); 2099 if (orig_gen == ci->i_rdcache_gen && 2100 orig_gen == ci->i_rdcache_revoking) { 2101 dout("invalidate_pages %p gen %d successful\n", inode, 2102 ci->i_rdcache_gen); 2103 ci->i_rdcache_revoking--; 2104 check = 1; 2105 } else { 2106 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", 2107 inode, orig_gen, ci->i_rdcache_gen, 2108 ci->i_rdcache_revoking); 2109 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2110 check = 1; 2111 } 2112 spin_unlock(&ci->i_ceph_lock); 2113 mutex_unlock(&ci->i_truncate_mutex); 2114 out: 2115 if (check) 2116 ceph_check_caps(ci, 0); 2117 } 2118 2119 /* 2120 * Make sure any pending truncation is applied before doing anything 2121 * that may depend on it. 2122 */ 2123 void __ceph_do_pending_vmtruncate(struct inode *inode) 2124 { 2125 struct ceph_inode_info *ci = ceph_inode(inode); 2126 u64 to; 2127 int wrbuffer_refs, finish = 0; 2128 2129 mutex_lock(&ci->i_truncate_mutex); 2130 retry: 2131 spin_lock(&ci->i_ceph_lock); 2132 if (ci->i_truncate_pending == 0) { 2133 dout("__do_pending_vmtruncate %p none pending\n", inode); 2134 spin_unlock(&ci->i_ceph_lock); 2135 mutex_unlock(&ci->i_truncate_mutex); 2136 return; 2137 } 2138 2139 /* 2140 * make sure any dirty snapped pages are flushed before we 2141 * possibly truncate them.. so write AND block! 2142 */ 2143 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { 2144 spin_unlock(&ci->i_ceph_lock); 2145 dout("__do_pending_vmtruncate %p flushing snaps first\n", 2146 inode); 2147 filemap_write_and_wait_range(&inode->i_data, 0, 2148 inode->i_sb->s_maxbytes); 2149 goto retry; 2150 } 2151 2152 /* there should be no reader or writer */ 2153 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); 2154 2155 to = ci->i_truncate_pagecache_size; 2156 wrbuffer_refs = ci->i_wrbuffer_ref; 2157 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, 2158 ci->i_truncate_pending, to); 2159 spin_unlock(&ci->i_ceph_lock); 2160 2161 ceph_fscache_resize(inode, to); 2162 truncate_pagecache(inode, to); 2163 2164 spin_lock(&ci->i_ceph_lock); 2165 if (to == ci->i_truncate_pagecache_size) { 2166 ci->i_truncate_pending = 0; 2167 finish = 1; 2168 } 2169 spin_unlock(&ci->i_ceph_lock); 2170 if (!finish) 2171 goto retry; 2172 2173 mutex_unlock(&ci->i_truncate_mutex); 2174 2175 if (wrbuffer_refs == 0) 2176 ceph_check_caps(ci, 0); 2177 2178 wake_up_all(&ci->i_cap_wq); 2179 } 2180 2181 static void ceph_inode_work(struct work_struct *work) 2182 { 2183 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 2184 i_work); 2185 struct inode *inode = &ci->netfs.inode; 2186 2187 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) { 2188 dout("writeback %p\n", inode); 2189 filemap_fdatawrite(&inode->i_data); 2190 } 2191 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask)) 2192 ceph_do_invalidate_pages(inode); 2193 2194 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask)) 2195 __ceph_do_pending_vmtruncate(inode); 2196 2197 if (test_and_clear_bit(CEPH_I_WORK_CHECK_CAPS, &ci->i_work_mask)) 2198 ceph_check_caps(ci, 0); 2199 2200 if (test_and_clear_bit(CEPH_I_WORK_FLUSH_SNAPS, &ci->i_work_mask)) 2201 ceph_flush_snaps(ci, NULL); 2202 2203 iput(inode); 2204 } 2205 2206 static const char *ceph_encrypted_get_link(struct dentry *dentry, 2207 struct inode *inode, 2208 struct delayed_call *done) 2209 { 2210 struct ceph_inode_info *ci = ceph_inode(inode); 2211 2212 if (!dentry) 2213 return ERR_PTR(-ECHILD); 2214 2215 return fscrypt_get_symlink(inode, ci->i_symlink, i_size_read(inode), 2216 done); 2217 } 2218 2219 static int ceph_encrypted_symlink_getattr(struct mnt_idmap *idmap, 2220 const struct path *path, 2221 struct kstat *stat, u32 request_mask, 2222 unsigned int query_flags) 2223 { 2224 int ret; 2225 2226 ret = ceph_getattr(idmap, path, stat, request_mask, query_flags); 2227 if (ret) 2228 return ret; 2229 return fscrypt_symlink_getattr(path, stat); 2230 } 2231 2232 /* 2233 * symlinks 2234 */ 2235 static const struct inode_operations ceph_symlink_iops = { 2236 .get_link = simple_get_link, 2237 .setattr = ceph_setattr, 2238 .getattr = ceph_getattr, 2239 .listxattr = ceph_listxattr, 2240 }; 2241 2242 static const struct inode_operations ceph_encrypted_symlink_iops = { 2243 .get_link = ceph_encrypted_get_link, 2244 .setattr = ceph_setattr, 2245 .getattr = ceph_encrypted_symlink_getattr, 2246 .listxattr = ceph_listxattr, 2247 }; 2248 2249 /* 2250 * Transfer the encrypted last block to the MDS and the MDS 2251 * will help update it when truncating a smaller size. 2252 * 2253 * We don't support a PAGE_SIZE that is smaller than the 2254 * CEPH_FSCRYPT_BLOCK_SIZE. 2255 */ 2256 static int fill_fscrypt_truncate(struct inode *inode, 2257 struct ceph_mds_request *req, 2258 struct iattr *attr) 2259 { 2260 struct ceph_inode_info *ci = ceph_inode(inode); 2261 int boff = attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE; 2262 loff_t pos, orig_pos = round_down(attr->ia_size, 2263 CEPH_FSCRYPT_BLOCK_SIZE); 2264 u64 block = orig_pos >> CEPH_FSCRYPT_BLOCK_SHIFT; 2265 struct ceph_pagelist *pagelist = NULL; 2266 struct kvec iov = {0}; 2267 struct iov_iter iter; 2268 struct page *page = NULL; 2269 struct ceph_fscrypt_truncate_size_header header; 2270 int retry_op = 0; 2271 int len = CEPH_FSCRYPT_BLOCK_SIZE; 2272 loff_t i_size = i_size_read(inode); 2273 int got, ret, issued; 2274 u64 objver; 2275 2276 ret = __ceph_get_caps(inode, NULL, CEPH_CAP_FILE_RD, 0, -1, &got); 2277 if (ret < 0) 2278 return ret; 2279 2280 issued = __ceph_caps_issued(ci, NULL); 2281 2282 dout("%s size %lld -> %lld got cap refs on %s, issued %s\n", __func__, 2283 i_size, attr->ia_size, ceph_cap_string(got), 2284 ceph_cap_string(issued)); 2285 2286 /* Try to writeback the dirty pagecaches */ 2287 if (issued & (CEPH_CAP_FILE_BUFFER)) { 2288 loff_t lend = orig_pos + CEPH_FSCRYPT_BLOCK_SHIFT - 1; 2289 2290 ret = filemap_write_and_wait_range(inode->i_mapping, 2291 orig_pos, lend); 2292 if (ret < 0) 2293 goto out; 2294 } 2295 2296 page = __page_cache_alloc(GFP_KERNEL); 2297 if (page == NULL) { 2298 ret = -ENOMEM; 2299 goto out; 2300 } 2301 2302 pagelist = ceph_pagelist_alloc(GFP_KERNEL); 2303 if (!pagelist) { 2304 ret = -ENOMEM; 2305 goto out; 2306 } 2307 2308 iov.iov_base = kmap_local_page(page); 2309 iov.iov_len = len; 2310 iov_iter_kvec(&iter, READ, &iov, 1, len); 2311 2312 pos = orig_pos; 2313 ret = __ceph_sync_read(inode, &pos, &iter, &retry_op, &objver); 2314 if (ret < 0) 2315 goto out; 2316 2317 /* Insert the header first */ 2318 header.ver = 1; 2319 header.compat = 1; 2320 header.change_attr = cpu_to_le64(inode_peek_iversion_raw(inode)); 2321 2322 /* 2323 * Always set the block_size to CEPH_FSCRYPT_BLOCK_SIZE, 2324 * because in MDS it may need this to do the truncate. 2325 */ 2326 header.block_size = cpu_to_le32(CEPH_FSCRYPT_BLOCK_SIZE); 2327 2328 /* 2329 * If we hit a hole here, we should just skip filling 2330 * the fscrypt for the request, because once the fscrypt 2331 * is enabled, the file will be split into many blocks 2332 * with the size of CEPH_FSCRYPT_BLOCK_SIZE, if there 2333 * has a hole, the hole size should be multiple of block 2334 * size. 2335 * 2336 * If the Rados object doesn't exist, it will be set to 0. 2337 */ 2338 if (!objver) { 2339 dout("%s hit hole, ppos %lld < size %lld\n", __func__, 2340 pos, i_size); 2341 2342 header.data_len = cpu_to_le32(8 + 8 + 4); 2343 header.file_offset = 0; 2344 ret = 0; 2345 } else { 2346 header.data_len = cpu_to_le32(8 + 8 + 4 + CEPH_FSCRYPT_BLOCK_SIZE); 2347 header.file_offset = cpu_to_le64(orig_pos); 2348 2349 /* truncate and zero out the extra contents for the last block */ 2350 memset(iov.iov_base + boff, 0, PAGE_SIZE - boff); 2351 2352 /* encrypt the last block */ 2353 ret = ceph_fscrypt_encrypt_block_inplace(inode, page, 2354 CEPH_FSCRYPT_BLOCK_SIZE, 2355 0, block, 2356 GFP_KERNEL); 2357 if (ret) 2358 goto out; 2359 } 2360 2361 /* Insert the header */ 2362 ret = ceph_pagelist_append(pagelist, &header, sizeof(header)); 2363 if (ret) 2364 goto out; 2365 2366 if (header.block_size) { 2367 /* Append the last block contents to pagelist */ 2368 ret = ceph_pagelist_append(pagelist, iov.iov_base, 2369 CEPH_FSCRYPT_BLOCK_SIZE); 2370 if (ret) 2371 goto out; 2372 } 2373 req->r_pagelist = pagelist; 2374 out: 2375 dout("%s %p size dropping cap refs on %s\n", __func__, 2376 inode, ceph_cap_string(got)); 2377 ceph_put_cap_refs(ci, got); 2378 if (iov.iov_base) 2379 kunmap_local(iov.iov_base); 2380 if (page) 2381 __free_pages(page, 0); 2382 if (ret && pagelist) 2383 ceph_pagelist_release(pagelist); 2384 return ret; 2385 } 2386 2387 int __ceph_setattr(struct inode *inode, struct iattr *attr, 2388 struct ceph_iattr *cia) 2389 { 2390 struct ceph_inode_info *ci = ceph_inode(inode); 2391 unsigned int ia_valid = attr->ia_valid; 2392 struct ceph_mds_request *req; 2393 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 2394 struct ceph_cap_flush *prealloc_cf; 2395 loff_t isize = i_size_read(inode); 2396 int issued; 2397 int release = 0, dirtied = 0; 2398 int mask = 0; 2399 int err = 0; 2400 int inode_dirty_flags = 0; 2401 bool lock_snap_rwsem = false; 2402 bool fill_fscrypt; 2403 int truncate_retry = 20; /* The RMW will take around 50ms */ 2404 2405 retry: 2406 prealloc_cf = ceph_alloc_cap_flush(); 2407 if (!prealloc_cf) 2408 return -ENOMEM; 2409 2410 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, 2411 USE_AUTH_MDS); 2412 if (IS_ERR(req)) { 2413 ceph_free_cap_flush(prealloc_cf); 2414 return PTR_ERR(req); 2415 } 2416 2417 fill_fscrypt = false; 2418 spin_lock(&ci->i_ceph_lock); 2419 issued = __ceph_caps_issued(ci, NULL); 2420 2421 if (!ci->i_head_snapc && 2422 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) { 2423 lock_snap_rwsem = true; 2424 if (!down_read_trylock(&mdsc->snap_rwsem)) { 2425 spin_unlock(&ci->i_ceph_lock); 2426 down_read(&mdsc->snap_rwsem); 2427 spin_lock(&ci->i_ceph_lock); 2428 issued = __ceph_caps_issued(ci, NULL); 2429 } 2430 } 2431 2432 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); 2433 #if IS_ENABLED(CONFIG_FS_ENCRYPTION) 2434 if (cia && cia->fscrypt_auth) { 2435 u32 len = ceph_fscrypt_auth_len(cia->fscrypt_auth); 2436 2437 if (len > sizeof(*cia->fscrypt_auth)) { 2438 err = -EINVAL; 2439 spin_unlock(&ci->i_ceph_lock); 2440 goto out; 2441 } 2442 2443 dout("setattr %llx:%llx fscrypt_auth len %u to %u)\n", 2444 ceph_vinop(inode), ci->fscrypt_auth_len, len); 2445 2446 /* It should never be re-set once set */ 2447 WARN_ON_ONCE(ci->fscrypt_auth); 2448 2449 if (issued & CEPH_CAP_AUTH_EXCL) { 2450 dirtied |= CEPH_CAP_AUTH_EXCL; 2451 kfree(ci->fscrypt_auth); 2452 ci->fscrypt_auth = (u8 *)cia->fscrypt_auth; 2453 ci->fscrypt_auth_len = len; 2454 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2455 ci->fscrypt_auth_len != len || 2456 memcmp(ci->fscrypt_auth, cia->fscrypt_auth, len)) { 2457 req->r_fscrypt_auth = cia->fscrypt_auth; 2458 mask |= CEPH_SETATTR_FSCRYPT_AUTH; 2459 release |= CEPH_CAP_AUTH_SHARED; 2460 } 2461 cia->fscrypt_auth = NULL; 2462 } 2463 #else 2464 if (cia && cia->fscrypt_auth) { 2465 err = -EINVAL; 2466 spin_unlock(&ci->i_ceph_lock); 2467 goto out; 2468 } 2469 #endif /* CONFIG_FS_ENCRYPTION */ 2470 2471 if (ia_valid & ATTR_UID) { 2472 dout("setattr %p uid %d -> %d\n", inode, 2473 from_kuid(&init_user_ns, inode->i_uid), 2474 from_kuid(&init_user_ns, attr->ia_uid)); 2475 if (issued & CEPH_CAP_AUTH_EXCL) { 2476 inode->i_uid = attr->ia_uid; 2477 dirtied |= CEPH_CAP_AUTH_EXCL; 2478 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2479 !uid_eq(attr->ia_uid, inode->i_uid)) { 2480 req->r_args.setattr.uid = cpu_to_le32( 2481 from_kuid(&init_user_ns, attr->ia_uid)); 2482 mask |= CEPH_SETATTR_UID; 2483 release |= CEPH_CAP_AUTH_SHARED; 2484 } 2485 } 2486 if (ia_valid & ATTR_GID) { 2487 dout("setattr %p gid %d -> %d\n", inode, 2488 from_kgid(&init_user_ns, inode->i_gid), 2489 from_kgid(&init_user_ns, attr->ia_gid)); 2490 if (issued & CEPH_CAP_AUTH_EXCL) { 2491 inode->i_gid = attr->ia_gid; 2492 dirtied |= CEPH_CAP_AUTH_EXCL; 2493 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2494 !gid_eq(attr->ia_gid, inode->i_gid)) { 2495 req->r_args.setattr.gid = cpu_to_le32( 2496 from_kgid(&init_user_ns, attr->ia_gid)); 2497 mask |= CEPH_SETATTR_GID; 2498 release |= CEPH_CAP_AUTH_SHARED; 2499 } 2500 } 2501 if (ia_valid & ATTR_MODE) { 2502 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, 2503 attr->ia_mode); 2504 if (issued & CEPH_CAP_AUTH_EXCL) { 2505 inode->i_mode = attr->ia_mode; 2506 dirtied |= CEPH_CAP_AUTH_EXCL; 2507 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2508 attr->ia_mode != inode->i_mode) { 2509 inode->i_mode = attr->ia_mode; 2510 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); 2511 mask |= CEPH_SETATTR_MODE; 2512 release |= CEPH_CAP_AUTH_SHARED; 2513 } 2514 } 2515 2516 if (ia_valid & ATTR_ATIME) { 2517 dout("setattr %p atime %lld.%ld -> %lld.%ld\n", inode, 2518 inode->i_atime.tv_sec, inode->i_atime.tv_nsec, 2519 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); 2520 if (issued & CEPH_CAP_FILE_EXCL) { 2521 ci->i_time_warp_seq++; 2522 inode->i_atime = attr->ia_atime; 2523 dirtied |= CEPH_CAP_FILE_EXCL; 2524 } else if ((issued & CEPH_CAP_FILE_WR) && 2525 timespec64_compare(&inode->i_atime, 2526 &attr->ia_atime) < 0) { 2527 inode->i_atime = attr->ia_atime; 2528 dirtied |= CEPH_CAP_FILE_WR; 2529 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2530 !timespec64_equal(&inode->i_atime, &attr->ia_atime)) { 2531 ceph_encode_timespec64(&req->r_args.setattr.atime, 2532 &attr->ia_atime); 2533 mask |= CEPH_SETATTR_ATIME; 2534 release |= CEPH_CAP_FILE_SHARED | 2535 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2536 } 2537 } 2538 if (ia_valid & ATTR_SIZE) { 2539 dout("setattr %p size %lld -> %lld\n", inode, isize, attr->ia_size); 2540 /* 2541 * Only when the new size is smaller and not aligned to 2542 * CEPH_FSCRYPT_BLOCK_SIZE will the RMW is needed. 2543 */ 2544 if (IS_ENCRYPTED(inode) && attr->ia_size < isize && 2545 (attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE)) { 2546 mask |= CEPH_SETATTR_SIZE; 2547 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2548 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2549 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2550 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2551 req->r_args.setattr.size = 2552 cpu_to_le64(round_up(attr->ia_size, 2553 CEPH_FSCRYPT_BLOCK_SIZE)); 2554 req->r_args.setattr.old_size = 2555 cpu_to_le64(round_up(isize, 2556 CEPH_FSCRYPT_BLOCK_SIZE)); 2557 req->r_fscrypt_file = attr->ia_size; 2558 fill_fscrypt = true; 2559 } else if ((issued & CEPH_CAP_FILE_EXCL) && attr->ia_size >= isize) { 2560 if (attr->ia_size > isize) { 2561 i_size_write(inode, attr->ia_size); 2562 inode->i_blocks = calc_inode_blocks(attr->ia_size); 2563 ci->i_reported_size = attr->ia_size; 2564 dirtied |= CEPH_CAP_FILE_EXCL; 2565 ia_valid |= ATTR_MTIME; 2566 } 2567 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2568 attr->ia_size != isize) { 2569 mask |= CEPH_SETATTR_SIZE; 2570 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2571 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2572 if (IS_ENCRYPTED(inode) && attr->ia_size) { 2573 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2574 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2575 req->r_args.setattr.size = 2576 cpu_to_le64(round_up(attr->ia_size, 2577 CEPH_FSCRYPT_BLOCK_SIZE)); 2578 req->r_args.setattr.old_size = 2579 cpu_to_le64(round_up(isize, 2580 CEPH_FSCRYPT_BLOCK_SIZE)); 2581 req->r_fscrypt_file = attr->ia_size; 2582 } else { 2583 req->r_args.setattr.size = cpu_to_le64(attr->ia_size); 2584 req->r_args.setattr.old_size = cpu_to_le64(isize); 2585 req->r_fscrypt_file = 0; 2586 } 2587 } 2588 } 2589 if (ia_valid & ATTR_MTIME) { 2590 dout("setattr %p mtime %lld.%ld -> %lld.%ld\n", inode, 2591 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 2592 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); 2593 if (issued & CEPH_CAP_FILE_EXCL) { 2594 ci->i_time_warp_seq++; 2595 inode->i_mtime = attr->ia_mtime; 2596 dirtied |= CEPH_CAP_FILE_EXCL; 2597 } else if ((issued & CEPH_CAP_FILE_WR) && 2598 timespec64_compare(&inode->i_mtime, 2599 &attr->ia_mtime) < 0) { 2600 inode->i_mtime = attr->ia_mtime; 2601 dirtied |= CEPH_CAP_FILE_WR; 2602 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2603 !timespec64_equal(&inode->i_mtime, &attr->ia_mtime)) { 2604 ceph_encode_timespec64(&req->r_args.setattr.mtime, 2605 &attr->ia_mtime); 2606 mask |= CEPH_SETATTR_MTIME; 2607 release |= CEPH_CAP_FILE_SHARED | 2608 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2609 } 2610 } 2611 2612 /* these do nothing */ 2613 if (ia_valid & ATTR_CTIME) { 2614 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| 2615 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; 2616 dout("setattr %p ctime %lld.%ld -> %lld.%ld (%s)\n", inode, 2617 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 2618 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, 2619 only ? "ctime only" : "ignored"); 2620 if (only) { 2621 /* 2622 * if kernel wants to dirty ctime but nothing else, 2623 * we need to choose a cap to dirty under, or do 2624 * a almost-no-op setattr 2625 */ 2626 if (issued & CEPH_CAP_AUTH_EXCL) 2627 dirtied |= CEPH_CAP_AUTH_EXCL; 2628 else if (issued & CEPH_CAP_FILE_EXCL) 2629 dirtied |= CEPH_CAP_FILE_EXCL; 2630 else if (issued & CEPH_CAP_XATTR_EXCL) 2631 dirtied |= CEPH_CAP_XATTR_EXCL; 2632 else 2633 mask |= CEPH_SETATTR_CTIME; 2634 } 2635 } 2636 if (ia_valid & ATTR_FILE) 2637 dout("setattr %p ATTR_FILE ... hrm!\n", inode); 2638 2639 if (dirtied) { 2640 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied, 2641 &prealloc_cf); 2642 inode->i_ctime = attr->ia_ctime; 2643 inode_inc_iversion_raw(inode); 2644 } 2645 2646 release &= issued; 2647 spin_unlock(&ci->i_ceph_lock); 2648 if (lock_snap_rwsem) { 2649 up_read(&mdsc->snap_rwsem); 2650 lock_snap_rwsem = false; 2651 } 2652 2653 if (inode_dirty_flags) 2654 __mark_inode_dirty(inode, inode_dirty_flags); 2655 2656 if (mask) { 2657 req->r_inode = inode; 2658 ihold(inode); 2659 req->r_inode_drop = release; 2660 req->r_args.setattr.mask = cpu_to_le32(mask); 2661 req->r_num_caps = 1; 2662 req->r_stamp = attr->ia_ctime; 2663 if (fill_fscrypt) { 2664 err = fill_fscrypt_truncate(inode, req, attr); 2665 if (err) 2666 goto out; 2667 } 2668 2669 /* 2670 * The truncate request will return -EAGAIN when the 2671 * last block has been updated just before the MDS 2672 * successfully gets the xlock for the FILE lock. To 2673 * avoid corrupting the file contents we need to retry 2674 * it. 2675 */ 2676 err = ceph_mdsc_do_request(mdsc, NULL, req); 2677 if (err == -EAGAIN && truncate_retry--) { 2678 dout("setattr %p result=%d (%s locally, %d remote), retry it!\n", 2679 inode, err, ceph_cap_string(dirtied), mask); 2680 ceph_mdsc_put_request(req); 2681 ceph_free_cap_flush(prealloc_cf); 2682 goto retry; 2683 } 2684 } 2685 out: 2686 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, 2687 ceph_cap_string(dirtied), mask); 2688 2689 ceph_mdsc_put_request(req); 2690 ceph_free_cap_flush(prealloc_cf); 2691 2692 if (err >= 0 && (mask & CEPH_SETATTR_SIZE)) 2693 __ceph_do_pending_vmtruncate(inode); 2694 2695 return err; 2696 } 2697 2698 /* 2699 * setattr 2700 */ 2701 int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 2702 struct iattr *attr) 2703 { 2704 struct inode *inode = d_inode(dentry); 2705 struct ceph_fs_client *fsc = ceph_inode_to_client(inode); 2706 int err; 2707 2708 if (ceph_snap(inode) != CEPH_NOSNAP) 2709 return -EROFS; 2710 2711 if (ceph_inode_is_shutdown(inode)) 2712 return -ESTALE; 2713 2714 err = fscrypt_prepare_setattr(dentry, attr); 2715 if (err) 2716 return err; 2717 2718 err = setattr_prepare(&nop_mnt_idmap, dentry, attr); 2719 if (err != 0) 2720 return err; 2721 2722 if ((attr->ia_valid & ATTR_SIZE) && 2723 attr->ia_size > max(i_size_read(inode), fsc->max_file_size)) 2724 return -EFBIG; 2725 2726 if ((attr->ia_valid & ATTR_SIZE) && 2727 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) 2728 return -EDQUOT; 2729 2730 err = __ceph_setattr(inode, attr, NULL); 2731 2732 if (err >= 0 && (attr->ia_valid & ATTR_MODE)) 2733 err = posix_acl_chmod(&nop_mnt_idmap, dentry, attr->ia_mode); 2734 2735 return err; 2736 } 2737 2738 int ceph_try_to_choose_auth_mds(struct inode *inode, int mask) 2739 { 2740 int issued = ceph_caps_issued(ceph_inode(inode)); 2741 2742 /* 2743 * If any 'x' caps is issued we can just choose the auth MDS 2744 * instead of the random replica MDSes. Because only when the 2745 * Locker is in LOCK_EXEC state will the loner client could 2746 * get the 'x' caps. And if we send the getattr requests to 2747 * any replica MDS it must auth pin and tries to rdlock from 2748 * the auth MDS, and then the auth MDS need to do the Locker 2749 * state transition to LOCK_SYNC. And after that the lock state 2750 * will change back. 2751 * 2752 * This cost much when doing the Locker state transition and 2753 * usually will need to revoke caps from clients. 2754 * 2755 * And for the 'Xs' caps for getxattr we will also choose the 2756 * auth MDS, because the MDS side code is buggy due to setxattr 2757 * won't notify the replica MDSes when the values changed and 2758 * the replica MDS will return the old values. Though we will 2759 * fix it in MDS code, but this still makes sense for old ceph. 2760 */ 2761 if (((mask & CEPH_CAP_ANY_SHARED) && (issued & CEPH_CAP_ANY_EXCL)) 2762 || (mask & (CEPH_STAT_RSTAT | CEPH_STAT_CAP_XATTR))) 2763 return USE_AUTH_MDS; 2764 else 2765 return USE_ANY_MDS; 2766 } 2767 2768 /* 2769 * Verify that we have a lease on the given mask. If not, 2770 * do a getattr against an mds. 2771 */ 2772 int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 2773 int mask, bool force) 2774 { 2775 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); 2776 struct ceph_mds_client *mdsc = fsc->mdsc; 2777 struct ceph_mds_request *req; 2778 int mode; 2779 int err; 2780 2781 if (ceph_snap(inode) == CEPH_SNAPDIR) { 2782 dout("do_getattr inode %p SNAPDIR\n", inode); 2783 return 0; 2784 } 2785 2786 dout("do_getattr inode %p mask %s mode 0%o\n", 2787 inode, ceph_cap_string(mask), inode->i_mode); 2788 if (!force && ceph_caps_issued_mask_metric(ceph_inode(inode), mask, 1)) 2789 return 0; 2790 2791 mode = ceph_try_to_choose_auth_mds(inode, mask); 2792 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode); 2793 if (IS_ERR(req)) 2794 return PTR_ERR(req); 2795 req->r_inode = inode; 2796 ihold(inode); 2797 req->r_num_caps = 1; 2798 req->r_args.getattr.mask = cpu_to_le32(mask); 2799 req->r_locked_page = locked_page; 2800 err = ceph_mdsc_do_request(mdsc, NULL, req); 2801 if (locked_page && err == 0) { 2802 u64 inline_version = req->r_reply_info.targeti.inline_version; 2803 if (inline_version == 0) { 2804 /* the reply is supposed to contain inline data */ 2805 err = -EINVAL; 2806 } else if (inline_version == CEPH_INLINE_NONE || 2807 inline_version == 1) { 2808 err = -ENODATA; 2809 } else { 2810 err = req->r_reply_info.targeti.inline_len; 2811 } 2812 } 2813 ceph_mdsc_put_request(req); 2814 dout("do_getattr result=%d\n", err); 2815 return err; 2816 } 2817 2818 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, 2819 size_t size) 2820 { 2821 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); 2822 struct ceph_mds_client *mdsc = fsc->mdsc; 2823 struct ceph_mds_request *req; 2824 int mode = USE_AUTH_MDS; 2825 int err; 2826 char *xattr_value; 2827 size_t xattr_value_len; 2828 2829 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETVXATTR, mode); 2830 if (IS_ERR(req)) { 2831 err = -ENOMEM; 2832 goto out; 2833 } 2834 2835 req->r_feature_needed = CEPHFS_FEATURE_OP_GETVXATTR; 2836 req->r_path2 = kstrdup(name, GFP_NOFS); 2837 if (!req->r_path2) { 2838 err = -ENOMEM; 2839 goto put; 2840 } 2841 2842 ihold(inode); 2843 req->r_inode = inode; 2844 err = ceph_mdsc_do_request(mdsc, NULL, req); 2845 if (err < 0) 2846 goto put; 2847 2848 xattr_value = req->r_reply_info.xattr_info.xattr_value; 2849 xattr_value_len = req->r_reply_info.xattr_info.xattr_value_len; 2850 2851 dout("do_getvxattr xattr_value_len:%zu, size:%zu\n", xattr_value_len, size); 2852 2853 err = (int)xattr_value_len; 2854 if (size == 0) 2855 goto put; 2856 2857 if (xattr_value_len > size) { 2858 err = -ERANGE; 2859 goto put; 2860 } 2861 2862 memcpy(value, xattr_value, xattr_value_len); 2863 put: 2864 ceph_mdsc_put_request(req); 2865 out: 2866 dout("do_getvxattr result=%d\n", err); 2867 return err; 2868 } 2869 2870 2871 /* 2872 * Check inode permissions. We verify we have a valid value for 2873 * the AUTH cap, then call the generic handler. 2874 */ 2875 int ceph_permission(struct mnt_idmap *idmap, struct inode *inode, 2876 int mask) 2877 { 2878 int err; 2879 2880 if (mask & MAY_NOT_BLOCK) 2881 return -ECHILD; 2882 2883 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); 2884 2885 if (!err) 2886 err = generic_permission(&nop_mnt_idmap, inode, mask); 2887 return err; 2888 } 2889 2890 /* Craft a mask of needed caps given a set of requested statx attrs. */ 2891 static int statx_to_caps(u32 want, umode_t mode) 2892 { 2893 int mask = 0; 2894 2895 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME|STATX_CHANGE_COOKIE)) 2896 mask |= CEPH_CAP_AUTH_SHARED; 2897 2898 if (want & (STATX_NLINK|STATX_CTIME|STATX_CHANGE_COOKIE)) { 2899 /* 2900 * The link count for directories depends on inode->i_subdirs, 2901 * and that is only updated when Fs caps are held. 2902 */ 2903 if (S_ISDIR(mode)) 2904 mask |= CEPH_CAP_FILE_SHARED; 2905 else 2906 mask |= CEPH_CAP_LINK_SHARED; 2907 } 2908 2909 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|STATX_BLOCKS|STATX_CHANGE_COOKIE)) 2910 mask |= CEPH_CAP_FILE_SHARED; 2911 2912 if (want & (STATX_CTIME|STATX_CHANGE_COOKIE)) 2913 mask |= CEPH_CAP_XATTR_SHARED; 2914 2915 return mask; 2916 } 2917 2918 /* 2919 * Get all the attributes. If we have sufficient caps for the requested attrs, 2920 * then we can avoid talking to the MDS at all. 2921 */ 2922 int ceph_getattr(struct mnt_idmap *idmap, const struct path *path, 2923 struct kstat *stat, u32 request_mask, unsigned int flags) 2924 { 2925 struct inode *inode = d_inode(path->dentry); 2926 struct super_block *sb = inode->i_sb; 2927 struct ceph_inode_info *ci = ceph_inode(inode); 2928 u32 valid_mask = STATX_BASIC_STATS; 2929 int err = 0; 2930 2931 if (ceph_inode_is_shutdown(inode)) 2932 return -ESTALE; 2933 2934 /* Skip the getattr altogether if we're asked not to sync */ 2935 if ((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) { 2936 err = ceph_do_getattr(inode, 2937 statx_to_caps(request_mask, inode->i_mode), 2938 flags & AT_STATX_FORCE_SYNC); 2939 if (err) 2940 return err; 2941 } 2942 2943 generic_fillattr(&nop_mnt_idmap, inode, stat); 2944 stat->ino = ceph_present_inode(inode); 2945 2946 /* 2947 * btime on newly-allocated inodes is 0, so if this is still set to 2948 * that, then assume that it's not valid. 2949 */ 2950 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) { 2951 stat->btime = ci->i_btime; 2952 valid_mask |= STATX_BTIME; 2953 } 2954 2955 if (request_mask & STATX_CHANGE_COOKIE) { 2956 stat->change_cookie = inode_peek_iversion_raw(inode); 2957 valid_mask |= STATX_CHANGE_COOKIE; 2958 } 2959 2960 if (ceph_snap(inode) == CEPH_NOSNAP) 2961 stat->dev = sb->s_dev; 2962 else 2963 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0; 2964 2965 if (S_ISDIR(inode->i_mode)) { 2966 if (ceph_test_mount_opt(ceph_sb_to_client(sb), RBYTES)) { 2967 stat->size = ci->i_rbytes; 2968 } else if (ceph_snap(inode) == CEPH_SNAPDIR) { 2969 struct ceph_inode_info *pci; 2970 struct ceph_snap_realm *realm; 2971 struct inode *parent; 2972 2973 parent = ceph_lookup_inode(sb, ceph_ino(inode)); 2974 if (IS_ERR(parent)) 2975 return PTR_ERR(parent); 2976 2977 pci = ceph_inode(parent); 2978 spin_lock(&pci->i_ceph_lock); 2979 realm = pci->i_snap_realm; 2980 if (realm) 2981 stat->size = realm->num_snaps; 2982 else 2983 stat->size = 0; 2984 spin_unlock(&pci->i_ceph_lock); 2985 iput(parent); 2986 } else { 2987 stat->size = ci->i_files + ci->i_subdirs; 2988 } 2989 stat->blocks = 0; 2990 stat->blksize = 65536; 2991 /* 2992 * Some applications rely on the number of st_nlink 2993 * value on directories to be either 0 (if unlinked) 2994 * or 2 + number of subdirectories. 2995 */ 2996 if (stat->nlink == 1) 2997 /* '.' + '..' + subdirs */ 2998 stat->nlink = 1 + 1 + ci->i_subdirs; 2999 } 3000 3001 stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC; 3002 if (IS_ENCRYPTED(inode)) 3003 stat->attributes |= STATX_ATTR_ENCRYPTED; 3004 stat->attributes_mask |= (STATX_ATTR_CHANGE_MONOTONIC | 3005 STATX_ATTR_ENCRYPTED); 3006 3007 stat->result_mask = request_mask & valid_mask; 3008 return err; 3009 } 3010 3011 void ceph_inode_shutdown(struct inode *inode) 3012 { 3013 struct ceph_inode_info *ci = ceph_inode(inode); 3014 struct rb_node *p; 3015 int iputs = 0; 3016 bool invalidate = false; 3017 3018 spin_lock(&ci->i_ceph_lock); 3019 ci->i_ceph_flags |= CEPH_I_SHUTDOWN; 3020 p = rb_first(&ci->i_caps); 3021 while (p) { 3022 struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); 3023 3024 p = rb_next(p); 3025 iputs += ceph_purge_inode_cap(inode, cap, &invalidate); 3026 } 3027 spin_unlock(&ci->i_ceph_lock); 3028 3029 if (invalidate) 3030 ceph_queue_invalidate(inode); 3031 while (iputs--) 3032 iput(inode); 3033 } 3034