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 /* 95 * We'll skip setting fscrypt context for snapshots, leaving that for 96 * the handle_reply(). 97 */ 98 if (ceph_snap(dir) != CEPH_SNAPDIR) { 99 err = ceph_fscrypt_prepare_context(dir, inode, as_ctx); 100 if (err) 101 goto out_err; 102 } 103 104 return inode; 105 out_err: 106 iput(inode); 107 return ERR_PTR(err); 108 } 109 110 void ceph_as_ctx_to_req(struct ceph_mds_request *req, 111 struct ceph_acl_sec_ctx *as_ctx) 112 { 113 if (as_ctx->pagelist) { 114 req->r_pagelist = as_ctx->pagelist; 115 as_ctx->pagelist = NULL; 116 } 117 ceph_fscrypt_as_ctx_to_req(req, as_ctx); 118 } 119 120 /** 121 * ceph_get_inode - find or create/hash a new inode 122 * @sb: superblock to search and allocate in 123 * @vino: vino to search for 124 * @newino: optional new inode to insert if one isn't found (may be NULL) 125 * 126 * Search for or insert a new inode into the hash for the given vino, and 127 * return a reference to it. If new is non-NULL, its reference is consumed. 128 */ 129 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino, 130 struct inode *newino) 131 { 132 struct inode *inode; 133 134 if (ceph_vino_is_reserved(vino)) 135 return ERR_PTR(-EREMOTEIO); 136 137 if (newino) { 138 inode = inode_insert5(newino, (unsigned long)vino.ino, 139 ceph_ino_compare, ceph_set_ino_cb, &vino); 140 if (inode != newino) 141 iput(newino); 142 } else { 143 inode = iget5_locked(sb, (unsigned long)vino.ino, 144 ceph_ino_compare, ceph_set_ino_cb, &vino); 145 } 146 147 if (!inode) { 148 dout("No inode found for %llx.%llx\n", vino.ino, vino.snap); 149 return ERR_PTR(-ENOMEM); 150 } 151 152 dout("get_inode on %llu=%llx.%llx got %p new %d\n", ceph_present_inode(inode), 153 ceph_vinop(inode), inode, !!(inode->i_state & I_NEW)); 154 return inode; 155 } 156 157 /* 158 * get/constuct snapdir inode for a given directory 159 */ 160 struct inode *ceph_get_snapdir(struct inode *parent) 161 { 162 struct ceph_vino vino = { 163 .ino = ceph_ino(parent), 164 .snap = CEPH_SNAPDIR, 165 }; 166 struct inode *inode = ceph_get_inode(parent->i_sb, vino, NULL); 167 struct ceph_inode_info *ci = ceph_inode(inode); 168 int ret = -ENOTDIR; 169 170 if (IS_ERR(inode)) 171 return inode; 172 173 if (!S_ISDIR(parent->i_mode)) { 174 pr_warn_once("bad snapdir parent type (mode=0%o)\n", 175 parent->i_mode); 176 goto err; 177 } 178 179 if (!(inode->i_state & I_NEW) && !S_ISDIR(inode->i_mode)) { 180 pr_warn_once("bad snapdir inode type (mode=0%o)\n", 181 inode->i_mode); 182 goto err; 183 } 184 185 inode->i_mode = parent->i_mode; 186 inode->i_uid = parent->i_uid; 187 inode->i_gid = parent->i_gid; 188 inode->i_mtime = parent->i_mtime; 189 inode->i_ctime = parent->i_ctime; 190 inode->i_atime = parent->i_atime; 191 ci->i_rbytes = 0; 192 ci->i_btime = ceph_inode(parent)->i_btime; 193 194 #ifdef CONFIG_FS_ENCRYPTION 195 /* if encrypted, just borrow fscrypt_auth from parent */ 196 if (IS_ENCRYPTED(parent)) { 197 struct ceph_inode_info *pci = ceph_inode(parent); 198 199 ci->fscrypt_auth = kmemdup(pci->fscrypt_auth, 200 pci->fscrypt_auth_len, 201 GFP_KERNEL); 202 if (ci->fscrypt_auth) { 203 inode->i_flags |= S_ENCRYPTED; 204 ci->fscrypt_auth_len = pci->fscrypt_auth_len; 205 } else { 206 dout("Failed to alloc snapdir fscrypt_auth\n"); 207 ret = -ENOMEM; 208 goto err; 209 } 210 } 211 #endif 212 if (inode->i_state & I_NEW) { 213 inode->i_op = &ceph_snapdir_iops; 214 inode->i_fop = &ceph_snapdir_fops; 215 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ 216 unlock_new_inode(inode); 217 } 218 219 return inode; 220 err: 221 if ((inode->i_state & I_NEW)) 222 discard_new_inode(inode); 223 else 224 iput(inode); 225 return ERR_PTR(ret); 226 } 227 228 const struct inode_operations ceph_file_iops = { 229 .permission = ceph_permission, 230 .setattr = ceph_setattr, 231 .getattr = ceph_getattr, 232 .listxattr = ceph_listxattr, 233 .get_inode_acl = ceph_get_acl, 234 .set_acl = ceph_set_acl, 235 }; 236 237 238 /* 239 * We use a 'frag tree' to keep track of the MDS's directory fragments 240 * for a given inode (usually there is just a single fragment). We 241 * need to know when a child frag is delegated to a new MDS, or when 242 * it is flagged as replicated, so we can direct our requests 243 * accordingly. 244 */ 245 246 /* 247 * find/create a frag in the tree 248 */ 249 static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, 250 u32 f) 251 { 252 struct rb_node **p; 253 struct rb_node *parent = NULL; 254 struct ceph_inode_frag *frag; 255 int c; 256 257 p = &ci->i_fragtree.rb_node; 258 while (*p) { 259 parent = *p; 260 frag = rb_entry(parent, struct ceph_inode_frag, node); 261 c = ceph_frag_compare(f, frag->frag); 262 if (c < 0) 263 p = &(*p)->rb_left; 264 else if (c > 0) 265 p = &(*p)->rb_right; 266 else 267 return frag; 268 } 269 270 frag = kmalloc(sizeof(*frag), GFP_NOFS); 271 if (!frag) 272 return ERR_PTR(-ENOMEM); 273 274 frag->frag = f; 275 frag->split_by = 0; 276 frag->mds = -1; 277 frag->ndist = 0; 278 279 rb_link_node(&frag->node, parent, p); 280 rb_insert_color(&frag->node, &ci->i_fragtree); 281 282 dout("get_or_create_frag added %llx.%llx frag %x\n", 283 ceph_vinop(&ci->netfs.inode), f); 284 return frag; 285 } 286 287 /* 288 * find a specific frag @f 289 */ 290 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) 291 { 292 struct rb_node *n = ci->i_fragtree.rb_node; 293 294 while (n) { 295 struct ceph_inode_frag *frag = 296 rb_entry(n, struct ceph_inode_frag, node); 297 int c = ceph_frag_compare(f, frag->frag); 298 if (c < 0) 299 n = n->rb_left; 300 else if (c > 0) 301 n = n->rb_right; 302 else 303 return frag; 304 } 305 return NULL; 306 } 307 308 /* 309 * Choose frag containing the given value @v. If @pfrag is 310 * specified, copy the frag delegation info to the caller if 311 * it is present. 312 */ 313 static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 314 struct ceph_inode_frag *pfrag, int *found) 315 { 316 u32 t = ceph_frag_make(0, 0); 317 struct ceph_inode_frag *frag; 318 unsigned nway, i; 319 u32 n; 320 321 if (found) 322 *found = 0; 323 324 while (1) { 325 WARN_ON(!ceph_frag_contains_value(t, v)); 326 frag = __ceph_find_frag(ci, t); 327 if (!frag) 328 break; /* t is a leaf */ 329 if (frag->split_by == 0) { 330 if (pfrag) 331 memcpy(pfrag, frag, sizeof(*pfrag)); 332 if (found) 333 *found = 1; 334 break; 335 } 336 337 /* choose child */ 338 nway = 1 << frag->split_by; 339 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, 340 frag->split_by, nway); 341 for (i = 0; i < nway; i++) { 342 n = ceph_frag_make_child(t, frag->split_by, i); 343 if (ceph_frag_contains_value(n, v)) { 344 t = n; 345 break; 346 } 347 } 348 BUG_ON(i == nway); 349 } 350 dout("choose_frag(%x) = %x\n", v, t); 351 352 return t; 353 } 354 355 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 356 struct ceph_inode_frag *pfrag, int *found) 357 { 358 u32 ret; 359 mutex_lock(&ci->i_fragtree_mutex); 360 ret = __ceph_choose_frag(ci, v, pfrag, found); 361 mutex_unlock(&ci->i_fragtree_mutex); 362 return ret; 363 } 364 365 /* 366 * Process dirfrag (delegation) info from the mds. Include leaf 367 * fragment in tree ONLY if ndist > 0. Otherwise, only 368 * branches/splits are included in i_fragtree) 369 */ 370 static int ceph_fill_dirfrag(struct inode *inode, 371 struct ceph_mds_reply_dirfrag *dirinfo) 372 { 373 struct ceph_inode_info *ci = ceph_inode(inode); 374 struct ceph_inode_frag *frag; 375 u32 id = le32_to_cpu(dirinfo->frag); 376 int mds = le32_to_cpu(dirinfo->auth); 377 int ndist = le32_to_cpu(dirinfo->ndist); 378 int diri_auth = -1; 379 int i; 380 int err = 0; 381 382 spin_lock(&ci->i_ceph_lock); 383 if (ci->i_auth_cap) 384 diri_auth = ci->i_auth_cap->mds; 385 spin_unlock(&ci->i_ceph_lock); 386 387 if (mds == -1) /* CDIR_AUTH_PARENT */ 388 mds = diri_auth; 389 390 mutex_lock(&ci->i_fragtree_mutex); 391 if (ndist == 0 && mds == diri_auth) { 392 /* no delegation info needed. */ 393 frag = __ceph_find_frag(ci, id); 394 if (!frag) 395 goto out; 396 if (frag->split_by == 0) { 397 /* tree leaf, remove */ 398 dout("fill_dirfrag removed %llx.%llx frag %x" 399 " (no ref)\n", ceph_vinop(inode), id); 400 rb_erase(&frag->node, &ci->i_fragtree); 401 kfree(frag); 402 } else { 403 /* tree branch, keep and clear */ 404 dout("fill_dirfrag cleared %llx.%llx frag %x" 405 " referral\n", ceph_vinop(inode), id); 406 frag->mds = -1; 407 frag->ndist = 0; 408 } 409 goto out; 410 } 411 412 413 /* find/add this frag to store mds delegation info */ 414 frag = __get_or_create_frag(ci, id); 415 if (IS_ERR(frag)) { 416 /* this is not the end of the world; we can continue 417 with bad/inaccurate delegation info */ 418 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", 419 ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); 420 err = -ENOMEM; 421 goto out; 422 } 423 424 frag->mds = mds; 425 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); 426 for (i = 0; i < frag->ndist; i++) 427 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); 428 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", 429 ceph_vinop(inode), frag->frag, frag->ndist); 430 431 out: 432 mutex_unlock(&ci->i_fragtree_mutex); 433 return err; 434 } 435 436 static int frag_tree_split_cmp(const void *l, const void *r) 437 { 438 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l; 439 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r; 440 return ceph_frag_compare(le32_to_cpu(ls->frag), 441 le32_to_cpu(rs->frag)); 442 } 443 444 static bool is_frag_child(u32 f, struct ceph_inode_frag *frag) 445 { 446 if (!frag) 447 return f == ceph_frag_make(0, 0); 448 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by) 449 return false; 450 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f)); 451 } 452 453 static int ceph_fill_fragtree(struct inode *inode, 454 struct ceph_frag_tree_head *fragtree, 455 struct ceph_mds_reply_dirfrag *dirinfo) 456 { 457 struct ceph_inode_info *ci = ceph_inode(inode); 458 struct ceph_inode_frag *frag, *prev_frag = NULL; 459 struct rb_node *rb_node; 460 unsigned i, split_by, nsplits; 461 u32 id; 462 bool update = false; 463 464 mutex_lock(&ci->i_fragtree_mutex); 465 nsplits = le32_to_cpu(fragtree->nsplits); 466 if (nsplits != ci->i_fragtree_nsplits) { 467 update = true; 468 } else if (nsplits) { 469 i = get_random_u32_below(nsplits); 470 id = le32_to_cpu(fragtree->splits[i].frag); 471 if (!__ceph_find_frag(ci, id)) 472 update = true; 473 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { 474 rb_node = rb_first(&ci->i_fragtree); 475 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 476 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) 477 update = true; 478 } 479 if (!update && dirinfo) { 480 id = le32_to_cpu(dirinfo->frag); 481 if (id != __ceph_choose_frag(ci, id, NULL, NULL)) 482 update = true; 483 } 484 if (!update) 485 goto out_unlock; 486 487 if (nsplits > 1) { 488 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]), 489 frag_tree_split_cmp, NULL); 490 } 491 492 dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode)); 493 rb_node = rb_first(&ci->i_fragtree); 494 for (i = 0; i < nsplits; i++) { 495 id = le32_to_cpu(fragtree->splits[i].frag); 496 split_by = le32_to_cpu(fragtree->splits[i].by); 497 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) { 498 pr_err("fill_fragtree %llx.%llx invalid split %d/%u, " 499 "frag %x split by %d\n", ceph_vinop(inode), 500 i, nsplits, id, split_by); 501 continue; 502 } 503 frag = NULL; 504 while (rb_node) { 505 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 506 if (ceph_frag_compare(frag->frag, id) >= 0) { 507 if (frag->frag != id) 508 frag = NULL; 509 else 510 rb_node = rb_next(rb_node); 511 break; 512 } 513 rb_node = rb_next(rb_node); 514 /* delete stale split/leaf node */ 515 if (frag->split_by > 0 || 516 !is_frag_child(frag->frag, prev_frag)) { 517 rb_erase(&frag->node, &ci->i_fragtree); 518 if (frag->split_by > 0) 519 ci->i_fragtree_nsplits--; 520 kfree(frag); 521 } 522 frag = NULL; 523 } 524 if (!frag) { 525 frag = __get_or_create_frag(ci, id); 526 if (IS_ERR(frag)) 527 continue; 528 } 529 if (frag->split_by == 0) 530 ci->i_fragtree_nsplits++; 531 frag->split_by = split_by; 532 dout(" frag %x split by %d\n", frag->frag, frag->split_by); 533 prev_frag = frag; 534 } 535 while (rb_node) { 536 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 537 rb_node = rb_next(rb_node); 538 /* delete stale split/leaf node */ 539 if (frag->split_by > 0 || 540 !is_frag_child(frag->frag, prev_frag)) { 541 rb_erase(&frag->node, &ci->i_fragtree); 542 if (frag->split_by > 0) 543 ci->i_fragtree_nsplits--; 544 kfree(frag); 545 } 546 } 547 out_unlock: 548 mutex_unlock(&ci->i_fragtree_mutex); 549 return 0; 550 } 551 552 /* 553 * initialize a newly allocated inode. 554 */ 555 struct inode *ceph_alloc_inode(struct super_block *sb) 556 { 557 struct ceph_inode_info *ci; 558 int i; 559 560 ci = alloc_inode_sb(sb, ceph_inode_cachep, GFP_NOFS); 561 if (!ci) 562 return NULL; 563 564 dout("alloc_inode %p\n", &ci->netfs.inode); 565 566 /* Set parameters for the netfs library */ 567 netfs_inode_init(&ci->netfs, &ceph_netfs_ops); 568 569 spin_lock_init(&ci->i_ceph_lock); 570 571 ci->i_version = 0; 572 ci->i_inline_version = 0; 573 ci->i_time_warp_seq = 0; 574 ci->i_ceph_flags = 0; 575 atomic64_set(&ci->i_ordered_count, 1); 576 atomic64_set(&ci->i_release_count, 1); 577 atomic64_set(&ci->i_complete_seq[0], 0); 578 atomic64_set(&ci->i_complete_seq[1], 0); 579 ci->i_symlink = NULL; 580 581 ci->i_max_bytes = 0; 582 ci->i_max_files = 0; 583 584 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); 585 memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout)); 586 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL); 587 588 ci->i_fragtree = RB_ROOT; 589 mutex_init(&ci->i_fragtree_mutex); 590 591 ci->i_xattrs.blob = NULL; 592 ci->i_xattrs.prealloc_blob = NULL; 593 ci->i_xattrs.dirty = false; 594 ci->i_xattrs.index = RB_ROOT; 595 ci->i_xattrs.count = 0; 596 ci->i_xattrs.names_size = 0; 597 ci->i_xattrs.vals_size = 0; 598 ci->i_xattrs.version = 0; 599 ci->i_xattrs.index_version = 0; 600 601 ci->i_caps = RB_ROOT; 602 ci->i_auth_cap = NULL; 603 ci->i_dirty_caps = 0; 604 ci->i_flushing_caps = 0; 605 INIT_LIST_HEAD(&ci->i_dirty_item); 606 INIT_LIST_HEAD(&ci->i_flushing_item); 607 ci->i_prealloc_cap_flush = NULL; 608 INIT_LIST_HEAD(&ci->i_cap_flush_list); 609 init_waitqueue_head(&ci->i_cap_wq); 610 ci->i_hold_caps_max = 0; 611 INIT_LIST_HEAD(&ci->i_cap_delay_list); 612 INIT_LIST_HEAD(&ci->i_cap_snaps); 613 ci->i_head_snapc = NULL; 614 ci->i_snap_caps = 0; 615 616 ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ; 617 for (i = 0; i < CEPH_FILE_MODE_BITS; i++) 618 ci->i_nr_by_mode[i] = 0; 619 620 mutex_init(&ci->i_truncate_mutex); 621 ci->i_truncate_seq = 0; 622 ci->i_truncate_size = 0; 623 ci->i_truncate_pending = 0; 624 ci->i_truncate_pagecache_size = 0; 625 626 ci->i_max_size = 0; 627 ci->i_reported_size = 0; 628 ci->i_wanted_max_size = 0; 629 ci->i_requested_max_size = 0; 630 631 ci->i_pin_ref = 0; 632 ci->i_rd_ref = 0; 633 ci->i_rdcache_ref = 0; 634 ci->i_wr_ref = 0; 635 ci->i_wb_ref = 0; 636 ci->i_fx_ref = 0; 637 ci->i_wrbuffer_ref = 0; 638 ci->i_wrbuffer_ref_head = 0; 639 atomic_set(&ci->i_filelock_ref, 0); 640 atomic_set(&ci->i_shared_gen, 1); 641 ci->i_rdcache_gen = 0; 642 ci->i_rdcache_revoking = 0; 643 644 INIT_LIST_HEAD(&ci->i_unsafe_dirops); 645 INIT_LIST_HEAD(&ci->i_unsafe_iops); 646 spin_lock_init(&ci->i_unsafe_lock); 647 648 ci->i_snap_realm = NULL; 649 INIT_LIST_HEAD(&ci->i_snap_realm_item); 650 INIT_LIST_HEAD(&ci->i_snap_flush_item); 651 652 INIT_WORK(&ci->i_work, ceph_inode_work); 653 ci->i_work_mask = 0; 654 memset(&ci->i_btime, '\0', sizeof(ci->i_btime)); 655 #ifdef CONFIG_FS_ENCRYPTION 656 ci->fscrypt_auth = NULL; 657 ci->fscrypt_auth_len = 0; 658 #endif 659 return &ci->netfs.inode; 660 } 661 662 void ceph_free_inode(struct inode *inode) 663 { 664 struct ceph_inode_info *ci = ceph_inode(inode); 665 666 kfree(ci->i_symlink); 667 #ifdef CONFIG_FS_ENCRYPTION 668 kfree(ci->fscrypt_auth); 669 #endif 670 fscrypt_free_inode(inode); 671 kmem_cache_free(ceph_inode_cachep, ci); 672 } 673 674 void ceph_evict_inode(struct inode *inode) 675 { 676 struct ceph_inode_info *ci = ceph_inode(inode); 677 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 678 struct ceph_inode_frag *frag; 679 struct rb_node *n; 680 681 dout("evict_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); 682 683 percpu_counter_dec(&mdsc->metric.total_inodes); 684 685 truncate_inode_pages_final(&inode->i_data); 686 if (inode->i_state & I_PINNING_FSCACHE_WB) 687 ceph_fscache_unuse_cookie(inode, true); 688 clear_inode(inode); 689 690 ceph_fscache_unregister_inode_cookie(ci); 691 fscrypt_put_encryption_info(inode); 692 693 __ceph_remove_caps(ci); 694 695 if (__ceph_has_quota(ci, QUOTA_GET_ANY)) 696 ceph_adjust_quota_realms_count(inode, false); 697 698 /* 699 * we may still have a snap_realm reference if there are stray 700 * caps in i_snap_caps. 701 */ 702 if (ci->i_snap_realm) { 703 if (ceph_snap(inode) == CEPH_NOSNAP) { 704 dout(" dropping residual ref to snap realm %p\n", 705 ci->i_snap_realm); 706 ceph_change_snap_realm(inode, NULL); 707 } else { 708 ceph_put_snapid_map(mdsc, ci->i_snapid_map); 709 ci->i_snap_realm = NULL; 710 } 711 } 712 713 while ((n = rb_first(&ci->i_fragtree)) != NULL) { 714 frag = rb_entry(n, struct ceph_inode_frag, node); 715 rb_erase(n, &ci->i_fragtree); 716 kfree(frag); 717 } 718 ci->i_fragtree_nsplits = 0; 719 720 __ceph_destroy_xattrs(ci); 721 if (ci->i_xattrs.blob) 722 ceph_buffer_put(ci->i_xattrs.blob); 723 if (ci->i_xattrs.prealloc_blob) 724 ceph_buffer_put(ci->i_xattrs.prealloc_blob); 725 726 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns)); 727 ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns)); 728 } 729 730 static inline blkcnt_t calc_inode_blocks(u64 size) 731 { 732 return (size + (1<<9) - 1) >> 9; 733 } 734 735 /* 736 * Helpers to fill in size, ctime, mtime, and atime. We have to be 737 * careful because either the client or MDS may have more up to date 738 * info, depending on which capabilities are held, and whether 739 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime 740 * and size are monotonically increasing, except when utimes() or 741 * truncate() increments the corresponding _seq values.) 742 */ 743 int ceph_fill_file_size(struct inode *inode, int issued, 744 u32 truncate_seq, u64 truncate_size, u64 size) 745 { 746 struct ceph_inode_info *ci = ceph_inode(inode); 747 int queue_trunc = 0; 748 loff_t isize = i_size_read(inode); 749 750 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || 751 (truncate_seq == ci->i_truncate_seq && size > isize)) { 752 dout("size %lld -> %llu\n", isize, size); 753 if (size > 0 && S_ISDIR(inode->i_mode)) { 754 pr_err("fill_file_size non-zero size for directory\n"); 755 size = 0; 756 } 757 i_size_write(inode, size); 758 inode->i_blocks = calc_inode_blocks(size); 759 /* 760 * If we're expanding, then we should be able to just update 761 * the existing cookie. 762 */ 763 if (size > isize) 764 ceph_fscache_update(inode); 765 ci->i_reported_size = size; 766 if (truncate_seq != ci->i_truncate_seq) { 767 dout("truncate_seq %u -> %u\n", 768 ci->i_truncate_seq, truncate_seq); 769 ci->i_truncate_seq = truncate_seq; 770 771 /* the MDS should have revoked these caps */ 772 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL | 773 CEPH_CAP_FILE_RD | 774 CEPH_CAP_FILE_WR | 775 CEPH_CAP_FILE_LAZYIO)); 776 /* 777 * If we hold relevant caps, or in the case where we're 778 * not the only client referencing this file and we 779 * don't hold those caps, then we need to check whether 780 * the file is either opened or mmaped 781 */ 782 if ((issued & (CEPH_CAP_FILE_CACHE| 783 CEPH_CAP_FILE_BUFFER)) || 784 mapping_mapped(inode->i_mapping) || 785 __ceph_is_file_opened(ci)) { 786 ci->i_truncate_pending++; 787 queue_trunc = 1; 788 } 789 } 790 } 791 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && 792 ci->i_truncate_size != truncate_size) { 793 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, 794 truncate_size); 795 ci->i_truncate_size = truncate_size; 796 if (IS_ENCRYPTED(inode)) 797 ci->i_truncate_pagecache_size = size; 798 else 799 ci->i_truncate_pagecache_size = truncate_size; 800 } 801 return queue_trunc; 802 } 803 804 void ceph_fill_file_time(struct inode *inode, int issued, 805 u64 time_warp_seq, struct timespec64 *ctime, 806 struct timespec64 *mtime, struct timespec64 *atime) 807 { 808 struct ceph_inode_info *ci = ceph_inode(inode); 809 int warn = 0; 810 811 if (issued & (CEPH_CAP_FILE_EXCL| 812 CEPH_CAP_FILE_WR| 813 CEPH_CAP_FILE_BUFFER| 814 CEPH_CAP_AUTH_EXCL| 815 CEPH_CAP_XATTR_EXCL)) { 816 if (ci->i_version == 0 || 817 timespec64_compare(ctime, &inode->i_ctime) > 0) { 818 dout("ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n", 819 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 820 ctime->tv_sec, ctime->tv_nsec); 821 inode->i_ctime = *ctime; 822 } 823 if (ci->i_version == 0 || 824 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { 825 /* the MDS did a utimes() */ 826 dout("mtime %lld.%09ld -> %lld.%09ld " 827 "tw %d -> %d\n", 828 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 829 mtime->tv_sec, mtime->tv_nsec, 830 ci->i_time_warp_seq, (int)time_warp_seq); 831 832 inode->i_mtime = *mtime; 833 inode->i_atime = *atime; 834 ci->i_time_warp_seq = time_warp_seq; 835 } else if (time_warp_seq == ci->i_time_warp_seq) { 836 /* nobody did utimes(); take the max */ 837 if (timespec64_compare(mtime, &inode->i_mtime) > 0) { 838 dout("mtime %lld.%09ld -> %lld.%09ld inc\n", 839 inode->i_mtime.tv_sec, 840 inode->i_mtime.tv_nsec, 841 mtime->tv_sec, mtime->tv_nsec); 842 inode->i_mtime = *mtime; 843 } 844 if (timespec64_compare(atime, &inode->i_atime) > 0) { 845 dout("atime %lld.%09ld -> %lld.%09ld inc\n", 846 inode->i_atime.tv_sec, 847 inode->i_atime.tv_nsec, 848 atime->tv_sec, atime->tv_nsec); 849 inode->i_atime = *atime; 850 } 851 } else if (issued & CEPH_CAP_FILE_EXCL) { 852 /* we did a utimes(); ignore mds values */ 853 } else { 854 warn = 1; 855 } 856 } else { 857 /* we have no write|excl caps; whatever the MDS says is true */ 858 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { 859 inode->i_ctime = *ctime; 860 inode->i_mtime = *mtime; 861 inode->i_atime = *atime; 862 ci->i_time_warp_seq = time_warp_seq; 863 } else { 864 warn = 1; 865 } 866 } 867 if (warn) /* time_warp_seq shouldn't go backwards */ 868 dout("%p mds time_warp_seq %llu < %u\n", 869 inode, time_warp_seq, ci->i_time_warp_seq); 870 } 871 872 #if IS_ENABLED(CONFIG_FS_ENCRYPTION) 873 static int decode_encrypted_symlink(const char *encsym, int enclen, u8 **decsym) 874 { 875 int declen; 876 u8 *sym; 877 878 sym = kmalloc(enclen + 1, GFP_NOFS); 879 if (!sym) 880 return -ENOMEM; 881 882 declen = ceph_base64_decode(encsym, enclen, sym); 883 if (declen < 0) { 884 pr_err("%s: can't decode symlink (%d). Content: %.*s\n", 885 __func__, declen, enclen, encsym); 886 kfree(sym); 887 return -EIO; 888 } 889 sym[declen + 1] = '\0'; 890 *decsym = sym; 891 return declen; 892 } 893 #else 894 static int decode_encrypted_symlink(const char *encsym, int symlen, u8 **decsym) 895 { 896 return -EOPNOTSUPP; 897 } 898 #endif 899 900 /* 901 * Populate an inode based on info from mds. May be called on new or 902 * existing inodes. 903 */ 904 int ceph_fill_inode(struct inode *inode, struct page *locked_page, 905 struct ceph_mds_reply_info_in *iinfo, 906 struct ceph_mds_reply_dirfrag *dirinfo, 907 struct ceph_mds_session *session, int cap_fmode, 908 struct ceph_cap_reservation *caps_reservation) 909 { 910 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 911 struct ceph_mds_reply_inode *info = iinfo->in; 912 struct ceph_inode_info *ci = ceph_inode(inode); 913 int issued, new_issued, info_caps; 914 struct timespec64 mtime, atime, ctime; 915 struct ceph_buffer *xattr_blob = NULL; 916 struct ceph_buffer *old_blob = NULL; 917 struct ceph_string *pool_ns = NULL; 918 struct ceph_cap *new_cap = NULL; 919 int err = 0; 920 bool wake = false; 921 bool queue_trunc = false; 922 bool new_version = false; 923 bool fill_inline = false; 924 umode_t mode = le32_to_cpu(info->mode); 925 dev_t rdev = le32_to_cpu(info->rdev); 926 927 lockdep_assert_held(&mdsc->snap_rwsem); 928 929 dout("%s %p ino %llx.%llx v %llu had %llu\n", __func__, 930 inode, ceph_vinop(inode), le64_to_cpu(info->version), 931 ci->i_version); 932 933 /* Once I_NEW is cleared, we can't change type or dev numbers */ 934 if (inode->i_state & I_NEW) { 935 inode->i_mode = mode; 936 } else { 937 if (inode_wrong_type(inode, mode)) { 938 pr_warn_once("inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n", 939 ceph_vinop(inode), inode->i_mode, mode); 940 return -ESTALE; 941 } 942 943 if ((S_ISCHR(mode) || S_ISBLK(mode)) && inode->i_rdev != rdev) { 944 pr_warn_once("dev inode rdev changed! (ino %llx.%llx is %u:%u, mds says %u:%u)\n", 945 ceph_vinop(inode), MAJOR(inode->i_rdev), 946 MINOR(inode->i_rdev), MAJOR(rdev), 947 MINOR(rdev)); 948 return -ESTALE; 949 } 950 } 951 952 info_caps = le32_to_cpu(info->cap.caps); 953 954 /* prealloc new cap struct */ 955 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) { 956 new_cap = ceph_get_cap(mdsc, caps_reservation); 957 if (!new_cap) 958 return -ENOMEM; 959 } 960 961 /* 962 * prealloc xattr data, if it looks like we'll need it. only 963 * if len > 4 (meaning there are actually xattrs; the first 4 964 * bytes are the xattr count). 965 */ 966 if (iinfo->xattr_len > 4) { 967 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); 968 if (!xattr_blob) 969 pr_err("%s ENOMEM xattr blob %d bytes\n", __func__, 970 iinfo->xattr_len); 971 } 972 973 if (iinfo->pool_ns_len > 0) 974 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data, 975 iinfo->pool_ns_len); 976 977 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map) 978 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode)); 979 980 spin_lock(&ci->i_ceph_lock); 981 982 /* 983 * provided version will be odd if inode value is projected, 984 * even if stable. skip the update if we have newer stable 985 * info (ours>=theirs, e.g. due to racing mds replies), unless 986 * we are getting projected (unstable) info (in which case the 987 * version is odd, and we want ours>theirs). 988 * us them 989 * 2 2 skip 990 * 3 2 skip 991 * 3 3 update 992 */ 993 if (ci->i_version == 0 || 994 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 995 le64_to_cpu(info->version) > (ci->i_version & ~1))) 996 new_version = true; 997 998 /* Update change_attribute */ 999 inode_set_max_iversion_raw(inode, iinfo->change_attr); 1000 1001 __ceph_caps_issued(ci, &issued); 1002 issued |= __ceph_caps_dirty(ci); 1003 new_issued = ~issued & info_caps; 1004 1005 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files); 1006 1007 #ifdef CONFIG_FS_ENCRYPTION 1008 if (iinfo->fscrypt_auth_len && 1009 ((inode->i_state & I_NEW) || (ci->fscrypt_auth_len == 0))) { 1010 kfree(ci->fscrypt_auth); 1011 ci->fscrypt_auth_len = iinfo->fscrypt_auth_len; 1012 ci->fscrypt_auth = iinfo->fscrypt_auth; 1013 iinfo->fscrypt_auth = NULL; 1014 iinfo->fscrypt_auth_len = 0; 1015 inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED); 1016 } 1017 #endif 1018 1019 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && 1020 (issued & CEPH_CAP_AUTH_EXCL) == 0) { 1021 inode->i_mode = mode; 1022 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); 1023 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); 1024 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, 1025 from_kuid(&init_user_ns, inode->i_uid), 1026 from_kgid(&init_user_ns, inode->i_gid)); 1027 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime); 1028 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime); 1029 } 1030 1031 /* directories have fl_stripe_unit set to zero */ 1032 if (IS_ENCRYPTED(inode)) 1033 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT; 1034 else if (le32_to_cpu(info->layout.fl_stripe_unit)) 1035 inode->i_blkbits = 1036 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; 1037 else 1038 inode->i_blkbits = CEPH_BLOCK_SHIFT; 1039 1040 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && 1041 (issued & CEPH_CAP_LINK_EXCL) == 0) 1042 set_nlink(inode, le32_to_cpu(info->nlink)); 1043 1044 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { 1045 /* be careful with mtime, atime, size */ 1046 ceph_decode_timespec64(&atime, &info->atime); 1047 ceph_decode_timespec64(&mtime, &info->mtime); 1048 ceph_decode_timespec64(&ctime, &info->ctime); 1049 ceph_fill_file_time(inode, issued, 1050 le32_to_cpu(info->time_warp_seq), 1051 &ctime, &mtime, &atime); 1052 } 1053 1054 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) { 1055 ci->i_files = le64_to_cpu(info->files); 1056 ci->i_subdirs = le64_to_cpu(info->subdirs); 1057 } 1058 1059 if (new_version || 1060 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { 1061 u64 size = le64_to_cpu(info->size); 1062 s64 old_pool = ci->i_layout.pool_id; 1063 struct ceph_string *old_ns; 1064 1065 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout); 1066 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, 1067 lockdep_is_held(&ci->i_ceph_lock)); 1068 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns); 1069 1070 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns) 1071 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; 1072 1073 pool_ns = old_ns; 1074 1075 if (IS_ENCRYPTED(inode) && size && 1076 iinfo->fscrypt_file_len == sizeof(__le64)) { 1077 u64 fsize = __le64_to_cpu(*(__le64 *)iinfo->fscrypt_file); 1078 1079 if (size == round_up(fsize, CEPH_FSCRYPT_BLOCK_SIZE)) { 1080 size = fsize; 1081 } else { 1082 pr_warn("fscrypt size mismatch: size=%llu fscrypt_file=%llu, discarding fscrypt_file size.\n", 1083 info->size, size); 1084 } 1085 } 1086 1087 queue_trunc = ceph_fill_file_size(inode, issued, 1088 le32_to_cpu(info->truncate_seq), 1089 le64_to_cpu(info->truncate_size), 1090 size); 1091 /* only update max_size on auth cap */ 1092 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 1093 ci->i_max_size != le64_to_cpu(info->max_size)) { 1094 dout("max_size %lld -> %llu\n", ci->i_max_size, 1095 le64_to_cpu(info->max_size)); 1096 ci->i_max_size = le64_to_cpu(info->max_size); 1097 } 1098 } 1099 1100 /* layout and rstat are not tracked by capability, update them if 1101 * the inode info is from auth mds */ 1102 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) { 1103 if (S_ISDIR(inode->i_mode)) { 1104 ci->i_dir_layout = iinfo->dir_layout; 1105 ci->i_rbytes = le64_to_cpu(info->rbytes); 1106 ci->i_rfiles = le64_to_cpu(info->rfiles); 1107 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); 1108 ci->i_dir_pin = iinfo->dir_pin; 1109 ci->i_rsnaps = iinfo->rsnaps; 1110 ceph_decode_timespec64(&ci->i_rctime, &info->rctime); 1111 } 1112 } 1113 1114 /* xattrs */ 1115 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ 1116 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && 1117 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { 1118 if (ci->i_xattrs.blob) 1119 old_blob = ci->i_xattrs.blob; 1120 ci->i_xattrs.blob = xattr_blob; 1121 if (xattr_blob) 1122 memcpy(ci->i_xattrs.blob->vec.iov_base, 1123 iinfo->xattr_data, iinfo->xattr_len); 1124 ci->i_xattrs.version = le64_to_cpu(info->xattr_version); 1125 ceph_forget_all_cached_acls(inode); 1126 ceph_security_invalidate_secctx(inode); 1127 xattr_blob = NULL; 1128 } 1129 1130 /* finally update i_version */ 1131 if (le64_to_cpu(info->version) > ci->i_version) 1132 ci->i_version = le64_to_cpu(info->version); 1133 1134 inode->i_mapping->a_ops = &ceph_aops; 1135 1136 switch (inode->i_mode & S_IFMT) { 1137 case S_IFIFO: 1138 case S_IFBLK: 1139 case S_IFCHR: 1140 case S_IFSOCK: 1141 inode->i_blkbits = PAGE_SHIFT; 1142 init_special_inode(inode, inode->i_mode, rdev); 1143 inode->i_op = &ceph_file_iops; 1144 break; 1145 case S_IFREG: 1146 inode->i_op = &ceph_file_iops; 1147 inode->i_fop = &ceph_file_fops; 1148 break; 1149 case S_IFLNK: 1150 if (!ci->i_symlink) { 1151 u32 symlen = iinfo->symlink_len; 1152 char *sym; 1153 1154 spin_unlock(&ci->i_ceph_lock); 1155 1156 if (IS_ENCRYPTED(inode)) { 1157 if (symlen != i_size_read(inode)) 1158 pr_err("%s %llx.%llx BAD symlink size %lld\n", 1159 __func__, ceph_vinop(inode), 1160 i_size_read(inode)); 1161 1162 err = decode_encrypted_symlink(iinfo->symlink, 1163 symlen, (u8 **)&sym); 1164 if (err < 0) { 1165 pr_err("%s decoding encrypted symlink failed: %d\n", 1166 __func__, err); 1167 goto out; 1168 } 1169 symlen = err; 1170 i_size_write(inode, symlen); 1171 inode->i_blocks = calc_inode_blocks(symlen); 1172 } else { 1173 if (symlen != i_size_read(inode)) { 1174 pr_err("%s %llx.%llx BAD symlink size %lld\n", 1175 __func__, ceph_vinop(inode), 1176 i_size_read(inode)); 1177 i_size_write(inode, symlen); 1178 inode->i_blocks = calc_inode_blocks(symlen); 1179 } 1180 1181 err = -ENOMEM; 1182 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); 1183 if (!sym) 1184 goto out; 1185 } 1186 1187 spin_lock(&ci->i_ceph_lock); 1188 if (!ci->i_symlink) 1189 ci->i_symlink = sym; 1190 else 1191 kfree(sym); /* lost a race */ 1192 } 1193 1194 if (IS_ENCRYPTED(inode)) { 1195 /* 1196 * Encrypted symlinks need to be decrypted before we can 1197 * cache their targets in i_link. Don't touch it here. 1198 */ 1199 inode->i_op = &ceph_encrypted_symlink_iops; 1200 } else { 1201 inode->i_link = ci->i_symlink; 1202 inode->i_op = &ceph_symlink_iops; 1203 } 1204 break; 1205 case S_IFDIR: 1206 inode->i_op = &ceph_dir_iops; 1207 inode->i_fop = &ceph_dir_fops; 1208 break; 1209 default: 1210 pr_err("%s %llx.%llx BAD mode 0%o\n", __func__, 1211 ceph_vinop(inode), inode->i_mode); 1212 } 1213 1214 /* were we issued a capability? */ 1215 if (info_caps) { 1216 if (ceph_snap(inode) == CEPH_NOSNAP) { 1217 ceph_add_cap(inode, session, 1218 le64_to_cpu(info->cap.cap_id), 1219 info_caps, 1220 le32_to_cpu(info->cap.wanted), 1221 le32_to_cpu(info->cap.seq), 1222 le32_to_cpu(info->cap.mseq), 1223 le64_to_cpu(info->cap.realm), 1224 info->cap.flags, &new_cap); 1225 1226 /* set dir completion flag? */ 1227 if (S_ISDIR(inode->i_mode) && 1228 ci->i_files == 0 && ci->i_subdirs == 0 && 1229 (info_caps & CEPH_CAP_FILE_SHARED) && 1230 (issued & CEPH_CAP_FILE_EXCL) == 0 && 1231 !__ceph_dir_is_complete(ci)) { 1232 dout(" marking %p complete (empty)\n", inode); 1233 i_size_write(inode, 0); 1234 __ceph_dir_set_complete(ci, 1235 atomic64_read(&ci->i_release_count), 1236 atomic64_read(&ci->i_ordered_count)); 1237 } 1238 1239 wake = true; 1240 } else { 1241 dout(" %p got snap_caps %s\n", inode, 1242 ceph_cap_string(info_caps)); 1243 ci->i_snap_caps |= info_caps; 1244 } 1245 } 1246 1247 if (iinfo->inline_version > 0 && 1248 iinfo->inline_version >= ci->i_inline_version) { 1249 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; 1250 ci->i_inline_version = iinfo->inline_version; 1251 if (ceph_has_inline_data(ci) && 1252 (locked_page || (info_caps & cache_caps))) 1253 fill_inline = true; 1254 } 1255 1256 if (cap_fmode >= 0) { 1257 if (!info_caps) 1258 pr_warn("mds issued no caps on %llx.%llx\n", 1259 ceph_vinop(inode)); 1260 __ceph_touch_fmode(ci, mdsc, cap_fmode); 1261 } 1262 1263 spin_unlock(&ci->i_ceph_lock); 1264 1265 ceph_fscache_register_inode_cookie(inode); 1266 1267 if (fill_inline) 1268 ceph_fill_inline_data(inode, locked_page, 1269 iinfo->inline_data, iinfo->inline_len); 1270 1271 if (wake) 1272 wake_up_all(&ci->i_cap_wq); 1273 1274 /* queue truncate if we saw i_size decrease */ 1275 if (queue_trunc) 1276 ceph_queue_vmtruncate(inode); 1277 1278 /* populate frag tree */ 1279 if (S_ISDIR(inode->i_mode)) 1280 ceph_fill_fragtree(inode, &info->fragtree, dirinfo); 1281 1282 /* update delegation info? */ 1283 if (dirinfo) 1284 ceph_fill_dirfrag(inode, dirinfo); 1285 1286 err = 0; 1287 out: 1288 if (new_cap) 1289 ceph_put_cap(mdsc, new_cap); 1290 ceph_buffer_put(old_blob); 1291 ceph_buffer_put(xattr_blob); 1292 ceph_put_string(pool_ns); 1293 return err; 1294 } 1295 1296 /* 1297 * caller should hold session s_mutex and dentry->d_lock. 1298 */ 1299 static void __update_dentry_lease(struct inode *dir, struct dentry *dentry, 1300 struct ceph_mds_reply_lease *lease, 1301 struct ceph_mds_session *session, 1302 unsigned long from_time, 1303 struct ceph_mds_session **old_lease_session) 1304 { 1305 struct ceph_dentry_info *di = ceph_dentry(dentry); 1306 unsigned mask = le16_to_cpu(lease->mask); 1307 long unsigned duration = le32_to_cpu(lease->duration_ms); 1308 long unsigned ttl = from_time + (duration * HZ) / 1000; 1309 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; 1310 1311 dout("update_dentry_lease %p duration %lu ms ttl %lu\n", 1312 dentry, duration, ttl); 1313 1314 /* only track leases on regular dentries */ 1315 if (ceph_snap(dir) != CEPH_NOSNAP) 1316 return; 1317 1318 if (mask & CEPH_LEASE_PRIMARY_LINK) 1319 di->flags |= CEPH_DENTRY_PRIMARY_LINK; 1320 else 1321 di->flags &= ~CEPH_DENTRY_PRIMARY_LINK; 1322 1323 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen); 1324 if (!(mask & CEPH_LEASE_VALID)) { 1325 __ceph_dentry_dir_lease_touch(di); 1326 return; 1327 } 1328 1329 if (di->lease_gen == atomic_read(&session->s_cap_gen) && 1330 time_before(ttl, di->time)) 1331 return; /* we already have a newer lease. */ 1332 1333 if (di->lease_session && di->lease_session != session) { 1334 *old_lease_session = di->lease_session; 1335 di->lease_session = NULL; 1336 } 1337 1338 if (!di->lease_session) 1339 di->lease_session = ceph_get_mds_session(session); 1340 di->lease_gen = atomic_read(&session->s_cap_gen); 1341 di->lease_seq = le32_to_cpu(lease->seq); 1342 di->lease_renew_after = half_ttl; 1343 di->lease_renew_from = 0; 1344 di->time = ttl; 1345 1346 __ceph_dentry_lease_touch(di); 1347 } 1348 1349 static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry, 1350 struct ceph_mds_reply_lease *lease, 1351 struct ceph_mds_session *session, 1352 unsigned long from_time) 1353 { 1354 struct ceph_mds_session *old_lease_session = NULL; 1355 spin_lock(&dentry->d_lock); 1356 __update_dentry_lease(dir, dentry, lease, session, from_time, 1357 &old_lease_session); 1358 spin_unlock(&dentry->d_lock); 1359 ceph_put_mds_session(old_lease_session); 1360 } 1361 1362 /* 1363 * update dentry lease without having parent inode locked 1364 */ 1365 static void update_dentry_lease_careful(struct dentry *dentry, 1366 struct ceph_mds_reply_lease *lease, 1367 struct ceph_mds_session *session, 1368 unsigned long from_time, 1369 char *dname, u32 dname_len, 1370 struct ceph_vino *pdvino, 1371 struct ceph_vino *ptvino) 1372 1373 { 1374 struct inode *dir; 1375 struct ceph_mds_session *old_lease_session = NULL; 1376 1377 spin_lock(&dentry->d_lock); 1378 /* make sure dentry's name matches target */ 1379 if (dentry->d_name.len != dname_len || 1380 memcmp(dentry->d_name.name, dname, dname_len)) 1381 goto out_unlock; 1382 1383 dir = d_inode(dentry->d_parent); 1384 /* make sure parent matches dvino */ 1385 if (!ceph_ino_compare(dir, pdvino)) 1386 goto out_unlock; 1387 1388 /* make sure dentry's inode matches target. NULL ptvino means that 1389 * we expect a negative dentry */ 1390 if (ptvino) { 1391 if (d_really_is_negative(dentry)) 1392 goto out_unlock; 1393 if (!ceph_ino_compare(d_inode(dentry), ptvino)) 1394 goto out_unlock; 1395 } else { 1396 if (d_really_is_positive(dentry)) 1397 goto out_unlock; 1398 } 1399 1400 __update_dentry_lease(dir, dentry, lease, session, 1401 from_time, &old_lease_session); 1402 out_unlock: 1403 spin_unlock(&dentry->d_lock); 1404 ceph_put_mds_session(old_lease_session); 1405 } 1406 1407 /* 1408 * splice a dentry to an inode. 1409 * caller must hold directory i_rwsem for this to be safe. 1410 */ 1411 static int splice_dentry(struct dentry **pdn, struct inode *in) 1412 { 1413 struct dentry *dn = *pdn; 1414 struct dentry *realdn; 1415 1416 BUG_ON(d_inode(dn)); 1417 1418 if (S_ISDIR(in->i_mode)) { 1419 /* If inode is directory, d_splice_alias() below will remove 1420 * 'realdn' from its origin parent. We need to ensure that 1421 * origin parent's readdir cache will not reference 'realdn' 1422 */ 1423 realdn = d_find_any_alias(in); 1424 if (realdn) { 1425 struct ceph_dentry_info *di = ceph_dentry(realdn); 1426 spin_lock(&realdn->d_lock); 1427 1428 realdn->d_op->d_prune(realdn); 1429 1430 di->time = jiffies; 1431 di->lease_shared_gen = 0; 1432 di->offset = 0; 1433 1434 spin_unlock(&realdn->d_lock); 1435 dput(realdn); 1436 } 1437 } 1438 1439 /* dn must be unhashed */ 1440 if (!d_unhashed(dn)) 1441 d_drop(dn); 1442 realdn = d_splice_alias(in, dn); 1443 if (IS_ERR(realdn)) { 1444 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", 1445 PTR_ERR(realdn), dn, in, ceph_vinop(in)); 1446 return PTR_ERR(realdn); 1447 } 1448 1449 if (realdn) { 1450 dout("dn %p (%d) spliced with %p (%d) " 1451 "inode %p ino %llx.%llx\n", 1452 dn, d_count(dn), 1453 realdn, d_count(realdn), 1454 d_inode(realdn), ceph_vinop(d_inode(realdn))); 1455 dput(dn); 1456 *pdn = realdn; 1457 } else { 1458 BUG_ON(!ceph_dentry(dn)); 1459 dout("dn %p attached to %p ino %llx.%llx\n", 1460 dn, d_inode(dn), ceph_vinop(d_inode(dn))); 1461 } 1462 return 0; 1463 } 1464 1465 /* 1466 * Incorporate results into the local cache. This is either just 1467 * one inode, or a directory, dentry, and possibly linked-to inode (e.g., 1468 * after a lookup). 1469 * 1470 * A reply may contain 1471 * a directory inode along with a dentry. 1472 * and/or a target inode 1473 * 1474 * Called with snap_rwsem (read). 1475 */ 1476 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) 1477 { 1478 struct ceph_mds_session *session = req->r_session; 1479 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1480 struct inode *in = NULL; 1481 struct ceph_vino tvino, dvino; 1482 struct ceph_fs_client *fsc = ceph_sb_to_client(sb); 1483 int err = 0; 1484 1485 dout("fill_trace %p is_dentry %d is_target %d\n", req, 1486 rinfo->head->is_dentry, rinfo->head->is_target); 1487 1488 if (!rinfo->head->is_target && !rinfo->head->is_dentry) { 1489 dout("fill_trace reply is empty!\n"); 1490 if (rinfo->head->result == 0 && req->r_parent) 1491 ceph_invalidate_dir_request(req); 1492 return 0; 1493 } 1494 1495 if (rinfo->head->is_dentry) { 1496 struct inode *dir = req->r_parent; 1497 1498 if (dir) { 1499 err = ceph_fill_inode(dir, NULL, &rinfo->diri, 1500 rinfo->dirfrag, session, -1, 1501 &req->r_caps_reservation); 1502 if (err < 0) 1503 goto done; 1504 } else { 1505 WARN_ON_ONCE(1); 1506 } 1507 1508 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME && 1509 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1510 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1511 bool is_nokey = false; 1512 struct qstr dname; 1513 struct dentry *dn, *parent; 1514 struct fscrypt_str oname = FSTR_INIT(NULL, 0); 1515 struct ceph_fname fname = { .dir = dir, 1516 .name = rinfo->dname, 1517 .ctext = rinfo->altname, 1518 .name_len = rinfo->dname_len, 1519 .ctext_len = rinfo->altname_len }; 1520 1521 BUG_ON(!rinfo->head->is_target); 1522 BUG_ON(req->r_dentry); 1523 1524 parent = d_find_any_alias(dir); 1525 BUG_ON(!parent); 1526 1527 err = ceph_fname_alloc_buffer(dir, &oname); 1528 if (err < 0) { 1529 dput(parent); 1530 goto done; 1531 } 1532 1533 err = ceph_fname_to_usr(&fname, NULL, &oname, &is_nokey); 1534 if (err < 0) { 1535 dput(parent); 1536 ceph_fname_free_buffer(dir, &oname); 1537 goto done; 1538 } 1539 dname.name = oname.name; 1540 dname.len = oname.len; 1541 dname.hash = full_name_hash(parent, dname.name, dname.len); 1542 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1543 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1544 retry_lookup: 1545 dn = d_lookup(parent, &dname); 1546 dout("d_lookup on parent=%p name=%.*s got %p\n", 1547 parent, dname.len, dname.name, dn); 1548 1549 if (!dn) { 1550 dn = d_alloc(parent, &dname); 1551 dout("d_alloc %p '%.*s' = %p\n", parent, 1552 dname.len, dname.name, dn); 1553 if (!dn) { 1554 dput(parent); 1555 ceph_fname_free_buffer(dir, &oname); 1556 err = -ENOMEM; 1557 goto done; 1558 } 1559 if (is_nokey) { 1560 spin_lock(&dn->d_lock); 1561 dn->d_flags |= DCACHE_NOKEY_NAME; 1562 spin_unlock(&dn->d_lock); 1563 } 1564 err = 0; 1565 } else if (d_really_is_positive(dn) && 1566 (ceph_ino(d_inode(dn)) != tvino.ino || 1567 ceph_snap(d_inode(dn)) != tvino.snap)) { 1568 dout(" dn %p points to wrong inode %p\n", 1569 dn, d_inode(dn)); 1570 ceph_dir_clear_ordered(dir); 1571 d_delete(dn); 1572 dput(dn); 1573 goto retry_lookup; 1574 } 1575 ceph_fname_free_buffer(dir, &oname); 1576 1577 req->r_dentry = dn; 1578 dput(parent); 1579 } 1580 } 1581 1582 if (rinfo->head->is_target) { 1583 /* Should be filled in by handle_reply */ 1584 BUG_ON(!req->r_target_inode); 1585 1586 in = req->r_target_inode; 1587 err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti, 1588 NULL, session, 1589 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1590 !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) && 1591 rinfo->head->result == 0) ? req->r_fmode : -1, 1592 &req->r_caps_reservation); 1593 if (err < 0) { 1594 pr_err("ceph_fill_inode badness %p %llx.%llx\n", 1595 in, ceph_vinop(in)); 1596 req->r_target_inode = NULL; 1597 if (in->i_state & I_NEW) 1598 discard_new_inode(in); 1599 else 1600 iput(in); 1601 goto done; 1602 } 1603 if (in->i_state & I_NEW) 1604 unlock_new_inode(in); 1605 } 1606 1607 /* 1608 * ignore null lease/binding on snapdir ENOENT, or else we 1609 * will have trouble splicing in the virtual snapdir later 1610 */ 1611 if (rinfo->head->is_dentry && 1612 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1613 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1614 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, 1615 fsc->mount_options->snapdir_name, 1616 req->r_dentry->d_name.len))) { 1617 /* 1618 * lookup link rename : null -> possibly existing inode 1619 * mknod symlink mkdir : null -> new inode 1620 * unlink : linked -> null 1621 */ 1622 struct inode *dir = req->r_parent; 1623 struct dentry *dn = req->r_dentry; 1624 bool have_dir_cap, have_lease; 1625 1626 BUG_ON(!dn); 1627 BUG_ON(!dir); 1628 BUG_ON(d_inode(dn->d_parent) != dir); 1629 1630 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1631 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1632 1633 BUG_ON(ceph_ino(dir) != dvino.ino); 1634 BUG_ON(ceph_snap(dir) != dvino.snap); 1635 1636 /* do we have a lease on the whole dir? */ 1637 have_dir_cap = 1638 (le32_to_cpu(rinfo->diri.in->cap.caps) & 1639 CEPH_CAP_FILE_SHARED); 1640 1641 /* do we have a dn lease? */ 1642 have_lease = have_dir_cap || 1643 le32_to_cpu(rinfo->dlease->duration_ms); 1644 if (!have_lease) 1645 dout("fill_trace no dentry lease or dir cap\n"); 1646 1647 /* rename? */ 1648 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { 1649 struct inode *olddir = req->r_old_dentry_dir; 1650 BUG_ON(!olddir); 1651 1652 dout(" src %p '%pd' dst %p '%pd'\n", 1653 req->r_old_dentry, 1654 req->r_old_dentry, 1655 dn, dn); 1656 dout("fill_trace doing d_move %p -> %p\n", 1657 req->r_old_dentry, dn); 1658 1659 /* d_move screws up sibling dentries' offsets */ 1660 ceph_dir_clear_ordered(dir); 1661 ceph_dir_clear_ordered(olddir); 1662 1663 d_move(req->r_old_dentry, dn); 1664 dout(" src %p '%pd' dst %p '%pd'\n", 1665 req->r_old_dentry, 1666 req->r_old_dentry, 1667 dn, dn); 1668 1669 /* ensure target dentry is invalidated, despite 1670 rehashing bug in vfs_rename_dir */ 1671 ceph_invalidate_dentry_lease(dn); 1672 1673 dout("dn %p gets new offset %lld\n", req->r_old_dentry, 1674 ceph_dentry(req->r_old_dentry)->offset); 1675 1676 /* swap r_dentry and r_old_dentry in case that 1677 * splice_dentry() gets called later. This is safe 1678 * because no other place will use them */ 1679 req->r_dentry = req->r_old_dentry; 1680 req->r_old_dentry = dn; 1681 dn = req->r_dentry; 1682 } 1683 1684 /* null dentry? */ 1685 if (!rinfo->head->is_target) { 1686 dout("fill_trace null dentry\n"); 1687 if (d_really_is_positive(dn)) { 1688 dout("d_delete %p\n", dn); 1689 ceph_dir_clear_ordered(dir); 1690 d_delete(dn); 1691 } else if (have_lease) { 1692 if (d_unhashed(dn)) 1693 d_add(dn, NULL); 1694 } 1695 1696 if (!d_unhashed(dn) && have_lease) 1697 update_dentry_lease(dir, dn, 1698 rinfo->dlease, session, 1699 req->r_request_started); 1700 goto done; 1701 } 1702 1703 /* attach proper inode */ 1704 if (d_really_is_negative(dn)) { 1705 ceph_dir_clear_ordered(dir); 1706 ihold(in); 1707 err = splice_dentry(&req->r_dentry, in); 1708 if (err < 0) 1709 goto done; 1710 dn = req->r_dentry; /* may have spliced */ 1711 } else if (d_really_is_positive(dn) && d_inode(dn) != in) { 1712 dout(" %p links to %p %llx.%llx, not %llx.%llx\n", 1713 dn, d_inode(dn), ceph_vinop(d_inode(dn)), 1714 ceph_vinop(in)); 1715 d_invalidate(dn); 1716 have_lease = false; 1717 } 1718 1719 if (have_lease) { 1720 update_dentry_lease(dir, dn, 1721 rinfo->dlease, session, 1722 req->r_request_started); 1723 } 1724 dout(" final dn %p\n", dn); 1725 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || 1726 req->r_op == CEPH_MDS_OP_MKSNAP) && 1727 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1728 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1729 struct inode *dir = req->r_parent; 1730 1731 /* fill out a snapdir LOOKUPSNAP dentry */ 1732 BUG_ON(!dir); 1733 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); 1734 BUG_ON(!req->r_dentry); 1735 dout(" linking snapped dir %p to dn %p\n", in, req->r_dentry); 1736 ceph_dir_clear_ordered(dir); 1737 ihold(in); 1738 err = splice_dentry(&req->r_dentry, in); 1739 if (err < 0) 1740 goto done; 1741 } else if (rinfo->head->is_dentry && req->r_dentry) { 1742 /* parent inode is not locked, be carefull */ 1743 struct ceph_vino *ptvino = NULL; 1744 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1745 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1746 if (rinfo->head->is_target) { 1747 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1748 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1749 ptvino = &tvino; 1750 } 1751 update_dentry_lease_careful(req->r_dentry, rinfo->dlease, 1752 session, req->r_request_started, 1753 rinfo->dname, rinfo->dname_len, 1754 &dvino, ptvino); 1755 } 1756 done: 1757 dout("fill_trace done err=%d\n", err); 1758 return err; 1759 } 1760 1761 /* 1762 * Prepopulate our cache with readdir results, leases, etc. 1763 */ 1764 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, 1765 struct ceph_mds_session *session) 1766 { 1767 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1768 int i, err = 0; 1769 1770 for (i = 0; i < rinfo->dir_nr; i++) { 1771 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1772 struct ceph_vino vino; 1773 struct inode *in; 1774 int rc; 1775 1776 vino.ino = le64_to_cpu(rde->inode.in->ino); 1777 vino.snap = le64_to_cpu(rde->inode.in->snapid); 1778 1779 in = ceph_get_inode(req->r_dentry->d_sb, vino, NULL); 1780 if (IS_ERR(in)) { 1781 err = PTR_ERR(in); 1782 dout("new_inode badness got %d\n", err); 1783 continue; 1784 } 1785 rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 1786 -1, &req->r_caps_reservation); 1787 if (rc < 0) { 1788 pr_err("ceph_fill_inode badness on %p got %d\n", 1789 in, rc); 1790 err = rc; 1791 if (in->i_state & I_NEW) { 1792 ihold(in); 1793 discard_new_inode(in); 1794 } 1795 } else if (in->i_state & I_NEW) { 1796 unlock_new_inode(in); 1797 } 1798 1799 iput(in); 1800 } 1801 1802 return err; 1803 } 1804 1805 void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl) 1806 { 1807 if (ctl->page) { 1808 kunmap(ctl->page); 1809 put_page(ctl->page); 1810 ctl->page = NULL; 1811 } 1812 } 1813 1814 static int fill_readdir_cache(struct inode *dir, struct dentry *dn, 1815 struct ceph_readdir_cache_control *ctl, 1816 struct ceph_mds_request *req) 1817 { 1818 struct ceph_inode_info *ci = ceph_inode(dir); 1819 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*); 1820 unsigned idx = ctl->index % nsize; 1821 pgoff_t pgoff = ctl->index / nsize; 1822 1823 if (!ctl->page || pgoff != page_index(ctl->page)) { 1824 ceph_readdir_cache_release(ctl); 1825 if (idx == 0) 1826 ctl->page = grab_cache_page(&dir->i_data, pgoff); 1827 else 1828 ctl->page = find_lock_page(&dir->i_data, pgoff); 1829 if (!ctl->page) { 1830 ctl->index = -1; 1831 return idx == 0 ? -ENOMEM : 0; 1832 } 1833 /* reading/filling the cache are serialized by 1834 * i_rwsem, no need to use page lock */ 1835 unlock_page(ctl->page); 1836 ctl->dentries = kmap(ctl->page); 1837 if (idx == 0) 1838 memset(ctl->dentries, 0, PAGE_SIZE); 1839 } 1840 1841 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) && 1842 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) { 1843 dout("readdir cache dn %p idx %d\n", dn, ctl->index); 1844 ctl->dentries[idx] = dn; 1845 ctl->index++; 1846 } else { 1847 dout("disable readdir cache\n"); 1848 ctl->index = -1; 1849 } 1850 return 0; 1851 } 1852 1853 int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1854 struct ceph_mds_session *session) 1855 { 1856 struct dentry *parent = req->r_dentry; 1857 struct inode *inode = d_inode(parent); 1858 struct ceph_inode_info *ci = ceph_inode(inode); 1859 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1860 struct qstr dname; 1861 struct dentry *dn; 1862 struct inode *in; 1863 int err = 0, skipped = 0, ret, i; 1864 u32 frag = le32_to_cpu(req->r_args.readdir.frag); 1865 u32 last_hash = 0; 1866 u32 fpos_offset; 1867 struct ceph_readdir_cache_control cache_ctl = {}; 1868 1869 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) 1870 return readdir_prepopulate_inodes_only(req, session); 1871 1872 if (rinfo->hash_order) { 1873 if (req->r_path2) { 1874 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, 1875 req->r_path2, 1876 strlen(req->r_path2)); 1877 last_hash = ceph_frag_value(last_hash); 1878 } else if (rinfo->offset_hash) { 1879 /* mds understands offset_hash */ 1880 WARN_ON_ONCE(req->r_readdir_offset != 2); 1881 last_hash = le32_to_cpu(req->r_args.readdir.offset_hash); 1882 } 1883 } 1884 1885 if (rinfo->dir_dir && 1886 le32_to_cpu(rinfo->dir_dir->frag) != frag) { 1887 dout("readdir_prepopulate got new frag %x -> %x\n", 1888 frag, le32_to_cpu(rinfo->dir_dir->frag)); 1889 frag = le32_to_cpu(rinfo->dir_dir->frag); 1890 if (!rinfo->hash_order) 1891 req->r_readdir_offset = 2; 1892 } 1893 1894 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { 1895 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", 1896 rinfo->dir_nr, parent); 1897 } else { 1898 dout("readdir_prepopulate %d items under dn %p\n", 1899 rinfo->dir_nr, parent); 1900 if (rinfo->dir_dir) 1901 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir); 1902 1903 if (ceph_frag_is_leftmost(frag) && 1904 req->r_readdir_offset == 2 && 1905 !(rinfo->hash_order && last_hash)) { 1906 /* note dir version at start of readdir so we can 1907 * tell if any dentries get dropped */ 1908 req->r_dir_release_cnt = 1909 atomic64_read(&ci->i_release_count); 1910 req->r_dir_ordered_cnt = 1911 atomic64_read(&ci->i_ordered_count); 1912 req->r_readdir_cache_idx = 0; 1913 } 1914 } 1915 1916 cache_ctl.index = req->r_readdir_cache_idx; 1917 fpos_offset = req->r_readdir_offset; 1918 1919 /* FIXME: release caps/leases if error occurs */ 1920 for (i = 0; i < rinfo->dir_nr; i++) { 1921 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1922 struct ceph_vino tvino; 1923 1924 dname.name = rde->name; 1925 dname.len = rde->name_len; 1926 dname.hash = full_name_hash(parent, dname.name, dname.len); 1927 1928 tvino.ino = le64_to_cpu(rde->inode.in->ino); 1929 tvino.snap = le64_to_cpu(rde->inode.in->snapid); 1930 1931 if (rinfo->hash_order) { 1932 u32 hash = ceph_frag_value(rde->raw_hash); 1933 if (hash != last_hash) 1934 fpos_offset = 2; 1935 last_hash = hash; 1936 rde->offset = ceph_make_fpos(hash, fpos_offset++, true); 1937 } else { 1938 rde->offset = ceph_make_fpos(frag, fpos_offset++, false); 1939 } 1940 1941 retry_lookup: 1942 dn = d_lookup(parent, &dname); 1943 dout("d_lookup on parent=%p name=%.*s got %p\n", 1944 parent, dname.len, dname.name, dn); 1945 1946 if (!dn) { 1947 dn = d_alloc(parent, &dname); 1948 dout("d_alloc %p '%.*s' = %p\n", parent, 1949 dname.len, dname.name, dn); 1950 if (!dn) { 1951 dout("d_alloc badness\n"); 1952 err = -ENOMEM; 1953 goto out; 1954 } 1955 if (rde->is_nokey) { 1956 spin_lock(&dn->d_lock); 1957 dn->d_flags |= DCACHE_NOKEY_NAME; 1958 spin_unlock(&dn->d_lock); 1959 } 1960 } else if (d_really_is_positive(dn) && 1961 (ceph_ino(d_inode(dn)) != tvino.ino || 1962 ceph_snap(d_inode(dn)) != tvino.snap)) { 1963 struct ceph_dentry_info *di = ceph_dentry(dn); 1964 dout(" dn %p points to wrong inode %p\n", 1965 dn, d_inode(dn)); 1966 1967 spin_lock(&dn->d_lock); 1968 if (di->offset > 0 && 1969 di->lease_shared_gen == 1970 atomic_read(&ci->i_shared_gen)) { 1971 __ceph_dir_clear_ordered(ci); 1972 di->offset = 0; 1973 } 1974 spin_unlock(&dn->d_lock); 1975 1976 d_delete(dn); 1977 dput(dn); 1978 goto retry_lookup; 1979 } 1980 1981 /* inode */ 1982 if (d_really_is_positive(dn)) { 1983 in = d_inode(dn); 1984 } else { 1985 in = ceph_get_inode(parent->d_sb, tvino, NULL); 1986 if (IS_ERR(in)) { 1987 dout("new_inode badness\n"); 1988 d_drop(dn); 1989 dput(dn); 1990 err = PTR_ERR(in); 1991 goto out; 1992 } 1993 } 1994 1995 ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 1996 -1, &req->r_caps_reservation); 1997 if (ret < 0) { 1998 pr_err("ceph_fill_inode badness on %p\n", in); 1999 if (d_really_is_negative(dn)) { 2000 if (in->i_state & I_NEW) { 2001 ihold(in); 2002 discard_new_inode(in); 2003 } 2004 iput(in); 2005 } 2006 d_drop(dn); 2007 err = ret; 2008 goto next_item; 2009 } 2010 if (in->i_state & I_NEW) 2011 unlock_new_inode(in); 2012 2013 if (d_really_is_negative(dn)) { 2014 if (ceph_security_xattr_deadlock(in)) { 2015 dout(" skip splicing dn %p to inode %p" 2016 " (security xattr deadlock)\n", dn, in); 2017 iput(in); 2018 skipped++; 2019 goto next_item; 2020 } 2021 2022 err = splice_dentry(&dn, in); 2023 if (err < 0) 2024 goto next_item; 2025 } 2026 2027 ceph_dentry(dn)->offset = rde->offset; 2028 2029 update_dentry_lease(d_inode(parent), dn, 2030 rde->lease, req->r_session, 2031 req->r_request_started); 2032 2033 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) { 2034 ret = fill_readdir_cache(d_inode(parent), dn, 2035 &cache_ctl, req); 2036 if (ret < 0) 2037 err = ret; 2038 } 2039 next_item: 2040 dput(dn); 2041 } 2042 out: 2043 if (err == 0 && skipped == 0) { 2044 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags); 2045 req->r_readdir_cache_idx = cache_ctl.index; 2046 } 2047 ceph_readdir_cache_release(&cache_ctl); 2048 dout("readdir_prepopulate done\n"); 2049 return err; 2050 } 2051 2052 bool ceph_inode_set_size(struct inode *inode, loff_t size) 2053 { 2054 struct ceph_inode_info *ci = ceph_inode(inode); 2055 bool ret; 2056 2057 spin_lock(&ci->i_ceph_lock); 2058 dout("set_size %p %llu -> %llu\n", inode, i_size_read(inode), size); 2059 i_size_write(inode, size); 2060 ceph_fscache_update(inode); 2061 inode->i_blocks = calc_inode_blocks(size); 2062 2063 ret = __ceph_should_report_size(ci); 2064 2065 spin_unlock(&ci->i_ceph_lock); 2066 2067 return ret; 2068 } 2069 2070 void ceph_queue_inode_work(struct inode *inode, int work_bit) 2071 { 2072 struct ceph_fs_client *fsc = ceph_inode_to_client(inode); 2073 struct ceph_inode_info *ci = ceph_inode(inode); 2074 set_bit(work_bit, &ci->i_work_mask); 2075 2076 ihold(inode); 2077 if (queue_work(fsc->inode_wq, &ci->i_work)) { 2078 dout("queue_inode_work %p, mask=%lx\n", inode, ci->i_work_mask); 2079 } else { 2080 dout("queue_inode_work %p already queued, mask=%lx\n", 2081 inode, ci->i_work_mask); 2082 iput(inode); 2083 } 2084 } 2085 2086 static void ceph_do_invalidate_pages(struct inode *inode) 2087 { 2088 struct ceph_inode_info *ci = ceph_inode(inode); 2089 u32 orig_gen; 2090 int check = 0; 2091 2092 ceph_fscache_invalidate(inode, false); 2093 2094 mutex_lock(&ci->i_truncate_mutex); 2095 2096 if (ceph_inode_is_shutdown(inode)) { 2097 pr_warn_ratelimited("%s: inode %llx.%llx is shut down\n", 2098 __func__, ceph_vinop(inode)); 2099 mapping_set_error(inode->i_mapping, -EIO); 2100 truncate_pagecache(inode, 0); 2101 mutex_unlock(&ci->i_truncate_mutex); 2102 goto out; 2103 } 2104 2105 spin_lock(&ci->i_ceph_lock); 2106 dout("invalidate_pages %p gen %d revoking %d\n", inode, 2107 ci->i_rdcache_gen, ci->i_rdcache_revoking); 2108 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { 2109 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2110 check = 1; 2111 spin_unlock(&ci->i_ceph_lock); 2112 mutex_unlock(&ci->i_truncate_mutex); 2113 goto out; 2114 } 2115 orig_gen = ci->i_rdcache_gen; 2116 spin_unlock(&ci->i_ceph_lock); 2117 2118 if (invalidate_inode_pages2(inode->i_mapping) < 0) { 2119 pr_err("invalidate_inode_pages2 %llx.%llx failed\n", 2120 ceph_vinop(inode)); 2121 } 2122 2123 spin_lock(&ci->i_ceph_lock); 2124 if (orig_gen == ci->i_rdcache_gen && 2125 orig_gen == ci->i_rdcache_revoking) { 2126 dout("invalidate_pages %p gen %d successful\n", inode, 2127 ci->i_rdcache_gen); 2128 ci->i_rdcache_revoking--; 2129 check = 1; 2130 } else { 2131 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", 2132 inode, orig_gen, ci->i_rdcache_gen, 2133 ci->i_rdcache_revoking); 2134 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2135 check = 1; 2136 } 2137 spin_unlock(&ci->i_ceph_lock); 2138 mutex_unlock(&ci->i_truncate_mutex); 2139 out: 2140 if (check) 2141 ceph_check_caps(ci, 0); 2142 } 2143 2144 /* 2145 * Make sure any pending truncation is applied before doing anything 2146 * that may depend on it. 2147 */ 2148 void __ceph_do_pending_vmtruncate(struct inode *inode) 2149 { 2150 struct ceph_inode_info *ci = ceph_inode(inode); 2151 u64 to; 2152 int wrbuffer_refs, finish = 0; 2153 2154 mutex_lock(&ci->i_truncate_mutex); 2155 retry: 2156 spin_lock(&ci->i_ceph_lock); 2157 if (ci->i_truncate_pending == 0) { 2158 dout("__do_pending_vmtruncate %p none pending\n", inode); 2159 spin_unlock(&ci->i_ceph_lock); 2160 mutex_unlock(&ci->i_truncate_mutex); 2161 return; 2162 } 2163 2164 /* 2165 * make sure any dirty snapped pages are flushed before we 2166 * possibly truncate them.. so write AND block! 2167 */ 2168 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { 2169 spin_unlock(&ci->i_ceph_lock); 2170 dout("__do_pending_vmtruncate %p flushing snaps first\n", 2171 inode); 2172 filemap_write_and_wait_range(&inode->i_data, 0, 2173 inode->i_sb->s_maxbytes); 2174 goto retry; 2175 } 2176 2177 /* there should be no reader or writer */ 2178 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); 2179 2180 to = ci->i_truncate_pagecache_size; 2181 wrbuffer_refs = ci->i_wrbuffer_ref; 2182 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, 2183 ci->i_truncate_pending, to); 2184 spin_unlock(&ci->i_ceph_lock); 2185 2186 ceph_fscache_resize(inode, to); 2187 truncate_pagecache(inode, to); 2188 2189 spin_lock(&ci->i_ceph_lock); 2190 if (to == ci->i_truncate_pagecache_size) { 2191 ci->i_truncate_pending = 0; 2192 finish = 1; 2193 } 2194 spin_unlock(&ci->i_ceph_lock); 2195 if (!finish) 2196 goto retry; 2197 2198 mutex_unlock(&ci->i_truncate_mutex); 2199 2200 if (wrbuffer_refs == 0) 2201 ceph_check_caps(ci, 0); 2202 2203 wake_up_all(&ci->i_cap_wq); 2204 } 2205 2206 static void ceph_inode_work(struct work_struct *work) 2207 { 2208 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 2209 i_work); 2210 struct inode *inode = &ci->netfs.inode; 2211 2212 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) { 2213 dout("writeback %p\n", inode); 2214 filemap_fdatawrite(&inode->i_data); 2215 } 2216 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask)) 2217 ceph_do_invalidate_pages(inode); 2218 2219 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask)) 2220 __ceph_do_pending_vmtruncate(inode); 2221 2222 if (test_and_clear_bit(CEPH_I_WORK_CHECK_CAPS, &ci->i_work_mask)) 2223 ceph_check_caps(ci, 0); 2224 2225 if (test_and_clear_bit(CEPH_I_WORK_FLUSH_SNAPS, &ci->i_work_mask)) 2226 ceph_flush_snaps(ci, NULL); 2227 2228 iput(inode); 2229 } 2230 2231 static const char *ceph_encrypted_get_link(struct dentry *dentry, 2232 struct inode *inode, 2233 struct delayed_call *done) 2234 { 2235 struct ceph_inode_info *ci = ceph_inode(inode); 2236 2237 if (!dentry) 2238 return ERR_PTR(-ECHILD); 2239 2240 return fscrypt_get_symlink(inode, ci->i_symlink, i_size_read(inode), 2241 done); 2242 } 2243 2244 static int ceph_encrypted_symlink_getattr(struct mnt_idmap *idmap, 2245 const struct path *path, 2246 struct kstat *stat, u32 request_mask, 2247 unsigned int query_flags) 2248 { 2249 int ret; 2250 2251 ret = ceph_getattr(idmap, path, stat, request_mask, query_flags); 2252 if (ret) 2253 return ret; 2254 return fscrypt_symlink_getattr(path, stat); 2255 } 2256 2257 /* 2258 * symlinks 2259 */ 2260 static const struct inode_operations ceph_symlink_iops = { 2261 .get_link = simple_get_link, 2262 .setattr = ceph_setattr, 2263 .getattr = ceph_getattr, 2264 .listxattr = ceph_listxattr, 2265 }; 2266 2267 static const struct inode_operations ceph_encrypted_symlink_iops = { 2268 .get_link = ceph_encrypted_get_link, 2269 .setattr = ceph_setattr, 2270 .getattr = ceph_encrypted_symlink_getattr, 2271 .listxattr = ceph_listxattr, 2272 }; 2273 2274 /* 2275 * Transfer the encrypted last block to the MDS and the MDS 2276 * will help update it when truncating a smaller size. 2277 * 2278 * We don't support a PAGE_SIZE that is smaller than the 2279 * CEPH_FSCRYPT_BLOCK_SIZE. 2280 */ 2281 static int fill_fscrypt_truncate(struct inode *inode, 2282 struct ceph_mds_request *req, 2283 struct iattr *attr) 2284 { 2285 struct ceph_inode_info *ci = ceph_inode(inode); 2286 int boff = attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE; 2287 loff_t pos, orig_pos = round_down(attr->ia_size, 2288 CEPH_FSCRYPT_BLOCK_SIZE); 2289 u64 block = orig_pos >> CEPH_FSCRYPT_BLOCK_SHIFT; 2290 struct ceph_pagelist *pagelist = NULL; 2291 struct kvec iov = {0}; 2292 struct iov_iter iter; 2293 struct page *page = NULL; 2294 struct ceph_fscrypt_truncate_size_header header; 2295 int retry_op = 0; 2296 int len = CEPH_FSCRYPT_BLOCK_SIZE; 2297 loff_t i_size = i_size_read(inode); 2298 int got, ret, issued; 2299 u64 objver; 2300 2301 ret = __ceph_get_caps(inode, NULL, CEPH_CAP_FILE_RD, 0, -1, &got); 2302 if (ret < 0) 2303 return ret; 2304 2305 issued = __ceph_caps_issued(ci, NULL); 2306 2307 dout("%s size %lld -> %lld got cap refs on %s, issued %s\n", __func__, 2308 i_size, attr->ia_size, ceph_cap_string(got), 2309 ceph_cap_string(issued)); 2310 2311 /* Try to writeback the dirty pagecaches */ 2312 if (issued & (CEPH_CAP_FILE_BUFFER)) { 2313 loff_t lend = orig_pos + CEPH_FSCRYPT_BLOCK_SHIFT - 1; 2314 2315 ret = filemap_write_and_wait_range(inode->i_mapping, 2316 orig_pos, lend); 2317 if (ret < 0) 2318 goto out; 2319 } 2320 2321 page = __page_cache_alloc(GFP_KERNEL); 2322 if (page == NULL) { 2323 ret = -ENOMEM; 2324 goto out; 2325 } 2326 2327 pagelist = ceph_pagelist_alloc(GFP_KERNEL); 2328 if (!pagelist) { 2329 ret = -ENOMEM; 2330 goto out; 2331 } 2332 2333 iov.iov_base = kmap_local_page(page); 2334 iov.iov_len = len; 2335 iov_iter_kvec(&iter, READ, &iov, 1, len); 2336 2337 pos = orig_pos; 2338 ret = __ceph_sync_read(inode, &pos, &iter, &retry_op, &objver); 2339 if (ret < 0) 2340 goto out; 2341 2342 /* Insert the header first */ 2343 header.ver = 1; 2344 header.compat = 1; 2345 header.change_attr = cpu_to_le64(inode_peek_iversion_raw(inode)); 2346 2347 /* 2348 * Always set the block_size to CEPH_FSCRYPT_BLOCK_SIZE, 2349 * because in MDS it may need this to do the truncate. 2350 */ 2351 header.block_size = cpu_to_le32(CEPH_FSCRYPT_BLOCK_SIZE); 2352 2353 /* 2354 * If we hit a hole here, we should just skip filling 2355 * the fscrypt for the request, because once the fscrypt 2356 * is enabled, the file will be split into many blocks 2357 * with the size of CEPH_FSCRYPT_BLOCK_SIZE, if there 2358 * has a hole, the hole size should be multiple of block 2359 * size. 2360 * 2361 * If the Rados object doesn't exist, it will be set to 0. 2362 */ 2363 if (!objver) { 2364 dout("%s hit hole, ppos %lld < size %lld\n", __func__, 2365 pos, i_size); 2366 2367 header.data_len = cpu_to_le32(8 + 8 + 4); 2368 header.file_offset = 0; 2369 ret = 0; 2370 } else { 2371 header.data_len = cpu_to_le32(8 + 8 + 4 + CEPH_FSCRYPT_BLOCK_SIZE); 2372 header.file_offset = cpu_to_le64(orig_pos); 2373 2374 /* truncate and zero out the extra contents for the last block */ 2375 memset(iov.iov_base + boff, 0, PAGE_SIZE - boff); 2376 2377 /* encrypt the last block */ 2378 ret = ceph_fscrypt_encrypt_block_inplace(inode, page, 2379 CEPH_FSCRYPT_BLOCK_SIZE, 2380 0, block, 2381 GFP_KERNEL); 2382 if (ret) 2383 goto out; 2384 } 2385 2386 /* Insert the header */ 2387 ret = ceph_pagelist_append(pagelist, &header, sizeof(header)); 2388 if (ret) 2389 goto out; 2390 2391 if (header.block_size) { 2392 /* Append the last block contents to pagelist */ 2393 ret = ceph_pagelist_append(pagelist, iov.iov_base, 2394 CEPH_FSCRYPT_BLOCK_SIZE); 2395 if (ret) 2396 goto out; 2397 } 2398 req->r_pagelist = pagelist; 2399 out: 2400 dout("%s %p size dropping cap refs on %s\n", __func__, 2401 inode, ceph_cap_string(got)); 2402 ceph_put_cap_refs(ci, got); 2403 if (iov.iov_base) 2404 kunmap_local(iov.iov_base); 2405 if (page) 2406 __free_pages(page, 0); 2407 if (ret && pagelist) 2408 ceph_pagelist_release(pagelist); 2409 return ret; 2410 } 2411 2412 int __ceph_setattr(struct inode *inode, struct iattr *attr, 2413 struct ceph_iattr *cia) 2414 { 2415 struct ceph_inode_info *ci = ceph_inode(inode); 2416 unsigned int ia_valid = attr->ia_valid; 2417 struct ceph_mds_request *req; 2418 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 2419 struct ceph_cap_flush *prealloc_cf; 2420 loff_t isize = i_size_read(inode); 2421 int issued; 2422 int release = 0, dirtied = 0; 2423 int mask = 0; 2424 int err = 0; 2425 int inode_dirty_flags = 0; 2426 bool lock_snap_rwsem = false; 2427 bool fill_fscrypt; 2428 int truncate_retry = 20; /* The RMW will take around 50ms */ 2429 2430 retry: 2431 prealloc_cf = ceph_alloc_cap_flush(); 2432 if (!prealloc_cf) 2433 return -ENOMEM; 2434 2435 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, 2436 USE_AUTH_MDS); 2437 if (IS_ERR(req)) { 2438 ceph_free_cap_flush(prealloc_cf); 2439 return PTR_ERR(req); 2440 } 2441 2442 fill_fscrypt = false; 2443 spin_lock(&ci->i_ceph_lock); 2444 issued = __ceph_caps_issued(ci, NULL); 2445 2446 if (!ci->i_head_snapc && 2447 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) { 2448 lock_snap_rwsem = true; 2449 if (!down_read_trylock(&mdsc->snap_rwsem)) { 2450 spin_unlock(&ci->i_ceph_lock); 2451 down_read(&mdsc->snap_rwsem); 2452 spin_lock(&ci->i_ceph_lock); 2453 issued = __ceph_caps_issued(ci, NULL); 2454 } 2455 } 2456 2457 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); 2458 #if IS_ENABLED(CONFIG_FS_ENCRYPTION) 2459 if (cia && cia->fscrypt_auth) { 2460 u32 len = ceph_fscrypt_auth_len(cia->fscrypt_auth); 2461 2462 if (len > sizeof(*cia->fscrypt_auth)) { 2463 err = -EINVAL; 2464 spin_unlock(&ci->i_ceph_lock); 2465 goto out; 2466 } 2467 2468 dout("setattr %llx:%llx fscrypt_auth len %u to %u)\n", 2469 ceph_vinop(inode), ci->fscrypt_auth_len, len); 2470 2471 /* It should never be re-set once set */ 2472 WARN_ON_ONCE(ci->fscrypt_auth); 2473 2474 if (issued & CEPH_CAP_AUTH_EXCL) { 2475 dirtied |= CEPH_CAP_AUTH_EXCL; 2476 kfree(ci->fscrypt_auth); 2477 ci->fscrypt_auth = (u8 *)cia->fscrypt_auth; 2478 ci->fscrypt_auth_len = len; 2479 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2480 ci->fscrypt_auth_len != len || 2481 memcmp(ci->fscrypt_auth, cia->fscrypt_auth, len)) { 2482 req->r_fscrypt_auth = cia->fscrypt_auth; 2483 mask |= CEPH_SETATTR_FSCRYPT_AUTH; 2484 release |= CEPH_CAP_AUTH_SHARED; 2485 } 2486 cia->fscrypt_auth = NULL; 2487 } 2488 #else 2489 if (cia && cia->fscrypt_auth) { 2490 err = -EINVAL; 2491 spin_unlock(&ci->i_ceph_lock); 2492 goto out; 2493 } 2494 #endif /* CONFIG_FS_ENCRYPTION */ 2495 2496 if (ia_valid & ATTR_UID) { 2497 dout("setattr %p uid %d -> %d\n", inode, 2498 from_kuid(&init_user_ns, inode->i_uid), 2499 from_kuid(&init_user_ns, attr->ia_uid)); 2500 if (issued & CEPH_CAP_AUTH_EXCL) { 2501 inode->i_uid = attr->ia_uid; 2502 dirtied |= CEPH_CAP_AUTH_EXCL; 2503 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2504 !uid_eq(attr->ia_uid, inode->i_uid)) { 2505 req->r_args.setattr.uid = cpu_to_le32( 2506 from_kuid(&init_user_ns, attr->ia_uid)); 2507 mask |= CEPH_SETATTR_UID; 2508 release |= CEPH_CAP_AUTH_SHARED; 2509 } 2510 } 2511 if (ia_valid & ATTR_GID) { 2512 dout("setattr %p gid %d -> %d\n", inode, 2513 from_kgid(&init_user_ns, inode->i_gid), 2514 from_kgid(&init_user_ns, attr->ia_gid)); 2515 if (issued & CEPH_CAP_AUTH_EXCL) { 2516 inode->i_gid = attr->ia_gid; 2517 dirtied |= CEPH_CAP_AUTH_EXCL; 2518 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2519 !gid_eq(attr->ia_gid, inode->i_gid)) { 2520 req->r_args.setattr.gid = cpu_to_le32( 2521 from_kgid(&init_user_ns, attr->ia_gid)); 2522 mask |= CEPH_SETATTR_GID; 2523 release |= CEPH_CAP_AUTH_SHARED; 2524 } 2525 } 2526 if (ia_valid & ATTR_MODE) { 2527 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, 2528 attr->ia_mode); 2529 if (issued & CEPH_CAP_AUTH_EXCL) { 2530 inode->i_mode = attr->ia_mode; 2531 dirtied |= CEPH_CAP_AUTH_EXCL; 2532 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2533 attr->ia_mode != inode->i_mode) { 2534 inode->i_mode = attr->ia_mode; 2535 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); 2536 mask |= CEPH_SETATTR_MODE; 2537 release |= CEPH_CAP_AUTH_SHARED; 2538 } 2539 } 2540 2541 if (ia_valid & ATTR_ATIME) { 2542 dout("setattr %p atime %lld.%ld -> %lld.%ld\n", inode, 2543 inode->i_atime.tv_sec, inode->i_atime.tv_nsec, 2544 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); 2545 if (issued & CEPH_CAP_FILE_EXCL) { 2546 ci->i_time_warp_seq++; 2547 inode->i_atime = attr->ia_atime; 2548 dirtied |= CEPH_CAP_FILE_EXCL; 2549 } else if ((issued & CEPH_CAP_FILE_WR) && 2550 timespec64_compare(&inode->i_atime, 2551 &attr->ia_atime) < 0) { 2552 inode->i_atime = attr->ia_atime; 2553 dirtied |= CEPH_CAP_FILE_WR; 2554 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2555 !timespec64_equal(&inode->i_atime, &attr->ia_atime)) { 2556 ceph_encode_timespec64(&req->r_args.setattr.atime, 2557 &attr->ia_atime); 2558 mask |= CEPH_SETATTR_ATIME; 2559 release |= CEPH_CAP_FILE_SHARED | 2560 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2561 } 2562 } 2563 if (ia_valid & ATTR_SIZE) { 2564 dout("setattr %p size %lld -> %lld\n", inode, isize, attr->ia_size); 2565 /* 2566 * Only when the new size is smaller and not aligned to 2567 * CEPH_FSCRYPT_BLOCK_SIZE will the RMW is needed. 2568 */ 2569 if (IS_ENCRYPTED(inode) && attr->ia_size < isize && 2570 (attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE)) { 2571 mask |= CEPH_SETATTR_SIZE; 2572 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2573 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2574 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2575 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2576 req->r_args.setattr.size = 2577 cpu_to_le64(round_up(attr->ia_size, 2578 CEPH_FSCRYPT_BLOCK_SIZE)); 2579 req->r_args.setattr.old_size = 2580 cpu_to_le64(round_up(isize, 2581 CEPH_FSCRYPT_BLOCK_SIZE)); 2582 req->r_fscrypt_file = attr->ia_size; 2583 fill_fscrypt = true; 2584 } else if ((issued & CEPH_CAP_FILE_EXCL) && attr->ia_size >= isize) { 2585 if (attr->ia_size > isize) { 2586 i_size_write(inode, attr->ia_size); 2587 inode->i_blocks = calc_inode_blocks(attr->ia_size); 2588 ci->i_reported_size = attr->ia_size; 2589 dirtied |= CEPH_CAP_FILE_EXCL; 2590 ia_valid |= ATTR_MTIME; 2591 } 2592 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2593 attr->ia_size != isize) { 2594 mask |= CEPH_SETATTR_SIZE; 2595 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2596 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2597 if (IS_ENCRYPTED(inode) && attr->ia_size) { 2598 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2599 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2600 req->r_args.setattr.size = 2601 cpu_to_le64(round_up(attr->ia_size, 2602 CEPH_FSCRYPT_BLOCK_SIZE)); 2603 req->r_args.setattr.old_size = 2604 cpu_to_le64(round_up(isize, 2605 CEPH_FSCRYPT_BLOCK_SIZE)); 2606 req->r_fscrypt_file = attr->ia_size; 2607 } else { 2608 req->r_args.setattr.size = cpu_to_le64(attr->ia_size); 2609 req->r_args.setattr.old_size = cpu_to_le64(isize); 2610 req->r_fscrypt_file = 0; 2611 } 2612 } 2613 } 2614 if (ia_valid & ATTR_MTIME) { 2615 dout("setattr %p mtime %lld.%ld -> %lld.%ld\n", inode, 2616 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 2617 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); 2618 if (issued & CEPH_CAP_FILE_EXCL) { 2619 ci->i_time_warp_seq++; 2620 inode->i_mtime = attr->ia_mtime; 2621 dirtied |= CEPH_CAP_FILE_EXCL; 2622 } else if ((issued & CEPH_CAP_FILE_WR) && 2623 timespec64_compare(&inode->i_mtime, 2624 &attr->ia_mtime) < 0) { 2625 inode->i_mtime = attr->ia_mtime; 2626 dirtied |= CEPH_CAP_FILE_WR; 2627 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2628 !timespec64_equal(&inode->i_mtime, &attr->ia_mtime)) { 2629 ceph_encode_timespec64(&req->r_args.setattr.mtime, 2630 &attr->ia_mtime); 2631 mask |= CEPH_SETATTR_MTIME; 2632 release |= CEPH_CAP_FILE_SHARED | 2633 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2634 } 2635 } 2636 2637 /* these do nothing */ 2638 if (ia_valid & ATTR_CTIME) { 2639 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| 2640 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; 2641 dout("setattr %p ctime %lld.%ld -> %lld.%ld (%s)\n", inode, 2642 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 2643 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, 2644 only ? "ctime only" : "ignored"); 2645 if (only) { 2646 /* 2647 * if kernel wants to dirty ctime but nothing else, 2648 * we need to choose a cap to dirty under, or do 2649 * a almost-no-op setattr 2650 */ 2651 if (issued & CEPH_CAP_AUTH_EXCL) 2652 dirtied |= CEPH_CAP_AUTH_EXCL; 2653 else if (issued & CEPH_CAP_FILE_EXCL) 2654 dirtied |= CEPH_CAP_FILE_EXCL; 2655 else if (issued & CEPH_CAP_XATTR_EXCL) 2656 dirtied |= CEPH_CAP_XATTR_EXCL; 2657 else 2658 mask |= CEPH_SETATTR_CTIME; 2659 } 2660 } 2661 if (ia_valid & ATTR_FILE) 2662 dout("setattr %p ATTR_FILE ... hrm!\n", inode); 2663 2664 if (dirtied) { 2665 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied, 2666 &prealloc_cf); 2667 inode->i_ctime = attr->ia_ctime; 2668 inode_inc_iversion_raw(inode); 2669 } 2670 2671 release &= issued; 2672 spin_unlock(&ci->i_ceph_lock); 2673 if (lock_snap_rwsem) { 2674 up_read(&mdsc->snap_rwsem); 2675 lock_snap_rwsem = false; 2676 } 2677 2678 if (inode_dirty_flags) 2679 __mark_inode_dirty(inode, inode_dirty_flags); 2680 2681 if (mask) { 2682 req->r_inode = inode; 2683 ihold(inode); 2684 req->r_inode_drop = release; 2685 req->r_args.setattr.mask = cpu_to_le32(mask); 2686 req->r_num_caps = 1; 2687 req->r_stamp = attr->ia_ctime; 2688 if (fill_fscrypt) { 2689 err = fill_fscrypt_truncate(inode, req, attr); 2690 if (err) 2691 goto out; 2692 } 2693 2694 /* 2695 * The truncate request will return -EAGAIN when the 2696 * last block has been updated just before the MDS 2697 * successfully gets the xlock for the FILE lock. To 2698 * avoid corrupting the file contents we need to retry 2699 * it. 2700 */ 2701 err = ceph_mdsc_do_request(mdsc, NULL, req); 2702 if (err == -EAGAIN && truncate_retry--) { 2703 dout("setattr %p result=%d (%s locally, %d remote), retry it!\n", 2704 inode, err, ceph_cap_string(dirtied), mask); 2705 ceph_mdsc_put_request(req); 2706 ceph_free_cap_flush(prealloc_cf); 2707 goto retry; 2708 } 2709 } 2710 out: 2711 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, 2712 ceph_cap_string(dirtied), mask); 2713 2714 ceph_mdsc_put_request(req); 2715 ceph_free_cap_flush(prealloc_cf); 2716 2717 if (err >= 0 && (mask & CEPH_SETATTR_SIZE)) 2718 __ceph_do_pending_vmtruncate(inode); 2719 2720 return err; 2721 } 2722 2723 /* 2724 * setattr 2725 */ 2726 int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 2727 struct iattr *attr) 2728 { 2729 struct inode *inode = d_inode(dentry); 2730 struct ceph_fs_client *fsc = ceph_inode_to_client(inode); 2731 int err; 2732 2733 if (ceph_snap(inode) != CEPH_NOSNAP) 2734 return -EROFS; 2735 2736 if (ceph_inode_is_shutdown(inode)) 2737 return -ESTALE; 2738 2739 err = fscrypt_prepare_setattr(dentry, attr); 2740 if (err) 2741 return err; 2742 2743 err = setattr_prepare(&nop_mnt_idmap, dentry, attr); 2744 if (err != 0) 2745 return err; 2746 2747 if ((attr->ia_valid & ATTR_SIZE) && 2748 attr->ia_size > max(i_size_read(inode), fsc->max_file_size)) 2749 return -EFBIG; 2750 2751 if ((attr->ia_valid & ATTR_SIZE) && 2752 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) 2753 return -EDQUOT; 2754 2755 err = __ceph_setattr(inode, attr, NULL); 2756 2757 if (err >= 0 && (attr->ia_valid & ATTR_MODE)) 2758 err = posix_acl_chmod(&nop_mnt_idmap, dentry, attr->ia_mode); 2759 2760 return err; 2761 } 2762 2763 int ceph_try_to_choose_auth_mds(struct inode *inode, int mask) 2764 { 2765 int issued = ceph_caps_issued(ceph_inode(inode)); 2766 2767 /* 2768 * If any 'x' caps is issued we can just choose the auth MDS 2769 * instead of the random replica MDSes. Because only when the 2770 * Locker is in LOCK_EXEC state will the loner client could 2771 * get the 'x' caps. And if we send the getattr requests to 2772 * any replica MDS it must auth pin and tries to rdlock from 2773 * the auth MDS, and then the auth MDS need to do the Locker 2774 * state transition to LOCK_SYNC. And after that the lock state 2775 * will change back. 2776 * 2777 * This cost much when doing the Locker state transition and 2778 * usually will need to revoke caps from clients. 2779 * 2780 * And for the 'Xs' caps for getxattr we will also choose the 2781 * auth MDS, because the MDS side code is buggy due to setxattr 2782 * won't notify the replica MDSes when the values changed and 2783 * the replica MDS will return the old values. Though we will 2784 * fix it in MDS code, but this still makes sense for old ceph. 2785 */ 2786 if (((mask & CEPH_CAP_ANY_SHARED) && (issued & CEPH_CAP_ANY_EXCL)) 2787 || (mask & (CEPH_STAT_RSTAT | CEPH_STAT_CAP_XATTR))) 2788 return USE_AUTH_MDS; 2789 else 2790 return USE_ANY_MDS; 2791 } 2792 2793 /* 2794 * Verify that we have a lease on the given mask. If not, 2795 * do a getattr against an mds. 2796 */ 2797 int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 2798 int mask, bool force) 2799 { 2800 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); 2801 struct ceph_mds_client *mdsc = fsc->mdsc; 2802 struct ceph_mds_request *req; 2803 int mode; 2804 int err; 2805 2806 if (ceph_snap(inode) == CEPH_SNAPDIR) { 2807 dout("do_getattr inode %p SNAPDIR\n", inode); 2808 return 0; 2809 } 2810 2811 dout("do_getattr inode %p mask %s mode 0%o\n", 2812 inode, ceph_cap_string(mask), inode->i_mode); 2813 if (!force && ceph_caps_issued_mask_metric(ceph_inode(inode), mask, 1)) 2814 return 0; 2815 2816 mode = ceph_try_to_choose_auth_mds(inode, mask); 2817 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode); 2818 if (IS_ERR(req)) 2819 return PTR_ERR(req); 2820 req->r_inode = inode; 2821 ihold(inode); 2822 req->r_num_caps = 1; 2823 req->r_args.getattr.mask = cpu_to_le32(mask); 2824 req->r_locked_page = locked_page; 2825 err = ceph_mdsc_do_request(mdsc, NULL, req); 2826 if (locked_page && err == 0) { 2827 u64 inline_version = req->r_reply_info.targeti.inline_version; 2828 if (inline_version == 0) { 2829 /* the reply is supposed to contain inline data */ 2830 err = -EINVAL; 2831 } else if (inline_version == CEPH_INLINE_NONE || 2832 inline_version == 1) { 2833 err = -ENODATA; 2834 } else { 2835 err = req->r_reply_info.targeti.inline_len; 2836 } 2837 } 2838 ceph_mdsc_put_request(req); 2839 dout("do_getattr result=%d\n", err); 2840 return err; 2841 } 2842 2843 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, 2844 size_t size) 2845 { 2846 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); 2847 struct ceph_mds_client *mdsc = fsc->mdsc; 2848 struct ceph_mds_request *req; 2849 int mode = USE_AUTH_MDS; 2850 int err; 2851 char *xattr_value; 2852 size_t xattr_value_len; 2853 2854 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETVXATTR, mode); 2855 if (IS_ERR(req)) { 2856 err = -ENOMEM; 2857 goto out; 2858 } 2859 2860 req->r_feature_needed = CEPHFS_FEATURE_OP_GETVXATTR; 2861 req->r_path2 = kstrdup(name, GFP_NOFS); 2862 if (!req->r_path2) { 2863 err = -ENOMEM; 2864 goto put; 2865 } 2866 2867 ihold(inode); 2868 req->r_inode = inode; 2869 err = ceph_mdsc_do_request(mdsc, NULL, req); 2870 if (err < 0) 2871 goto put; 2872 2873 xattr_value = req->r_reply_info.xattr_info.xattr_value; 2874 xattr_value_len = req->r_reply_info.xattr_info.xattr_value_len; 2875 2876 dout("do_getvxattr xattr_value_len:%zu, size:%zu\n", xattr_value_len, size); 2877 2878 err = (int)xattr_value_len; 2879 if (size == 0) 2880 goto put; 2881 2882 if (xattr_value_len > size) { 2883 err = -ERANGE; 2884 goto put; 2885 } 2886 2887 memcpy(value, xattr_value, xattr_value_len); 2888 put: 2889 ceph_mdsc_put_request(req); 2890 out: 2891 dout("do_getvxattr result=%d\n", err); 2892 return err; 2893 } 2894 2895 2896 /* 2897 * Check inode permissions. We verify we have a valid value for 2898 * the AUTH cap, then call the generic handler. 2899 */ 2900 int ceph_permission(struct mnt_idmap *idmap, struct inode *inode, 2901 int mask) 2902 { 2903 int err; 2904 2905 if (mask & MAY_NOT_BLOCK) 2906 return -ECHILD; 2907 2908 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); 2909 2910 if (!err) 2911 err = generic_permission(&nop_mnt_idmap, inode, mask); 2912 return err; 2913 } 2914 2915 /* Craft a mask of needed caps given a set of requested statx attrs. */ 2916 static int statx_to_caps(u32 want, umode_t mode) 2917 { 2918 int mask = 0; 2919 2920 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME|STATX_CHANGE_COOKIE)) 2921 mask |= CEPH_CAP_AUTH_SHARED; 2922 2923 if (want & (STATX_NLINK|STATX_CTIME|STATX_CHANGE_COOKIE)) { 2924 /* 2925 * The link count for directories depends on inode->i_subdirs, 2926 * and that is only updated when Fs caps are held. 2927 */ 2928 if (S_ISDIR(mode)) 2929 mask |= CEPH_CAP_FILE_SHARED; 2930 else 2931 mask |= CEPH_CAP_LINK_SHARED; 2932 } 2933 2934 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|STATX_BLOCKS|STATX_CHANGE_COOKIE)) 2935 mask |= CEPH_CAP_FILE_SHARED; 2936 2937 if (want & (STATX_CTIME|STATX_CHANGE_COOKIE)) 2938 mask |= CEPH_CAP_XATTR_SHARED; 2939 2940 return mask; 2941 } 2942 2943 /* 2944 * Get all the attributes. If we have sufficient caps for the requested attrs, 2945 * then we can avoid talking to the MDS at all. 2946 */ 2947 int ceph_getattr(struct mnt_idmap *idmap, const struct path *path, 2948 struct kstat *stat, u32 request_mask, unsigned int flags) 2949 { 2950 struct inode *inode = d_inode(path->dentry); 2951 struct super_block *sb = inode->i_sb; 2952 struct ceph_inode_info *ci = ceph_inode(inode); 2953 u32 valid_mask = STATX_BASIC_STATS; 2954 int err = 0; 2955 2956 if (ceph_inode_is_shutdown(inode)) 2957 return -ESTALE; 2958 2959 /* Skip the getattr altogether if we're asked not to sync */ 2960 if ((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) { 2961 err = ceph_do_getattr(inode, 2962 statx_to_caps(request_mask, inode->i_mode), 2963 flags & AT_STATX_FORCE_SYNC); 2964 if (err) 2965 return err; 2966 } 2967 2968 generic_fillattr(&nop_mnt_idmap, inode, stat); 2969 stat->ino = ceph_present_inode(inode); 2970 2971 /* 2972 * btime on newly-allocated inodes is 0, so if this is still set to 2973 * that, then assume that it's not valid. 2974 */ 2975 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) { 2976 stat->btime = ci->i_btime; 2977 valid_mask |= STATX_BTIME; 2978 } 2979 2980 if (request_mask & STATX_CHANGE_COOKIE) { 2981 stat->change_cookie = inode_peek_iversion_raw(inode); 2982 valid_mask |= STATX_CHANGE_COOKIE; 2983 } 2984 2985 if (ceph_snap(inode) == CEPH_NOSNAP) 2986 stat->dev = sb->s_dev; 2987 else 2988 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0; 2989 2990 if (S_ISDIR(inode->i_mode)) { 2991 if (ceph_test_mount_opt(ceph_sb_to_client(sb), RBYTES)) { 2992 stat->size = ci->i_rbytes; 2993 } else if (ceph_snap(inode) == CEPH_SNAPDIR) { 2994 struct ceph_inode_info *pci; 2995 struct ceph_snap_realm *realm; 2996 struct inode *parent; 2997 2998 parent = ceph_lookup_inode(sb, ceph_ino(inode)); 2999 if (IS_ERR(parent)) 3000 return PTR_ERR(parent); 3001 3002 pci = ceph_inode(parent); 3003 spin_lock(&pci->i_ceph_lock); 3004 realm = pci->i_snap_realm; 3005 if (realm) 3006 stat->size = realm->num_snaps; 3007 else 3008 stat->size = 0; 3009 spin_unlock(&pci->i_ceph_lock); 3010 iput(parent); 3011 } else { 3012 stat->size = ci->i_files + ci->i_subdirs; 3013 } 3014 stat->blocks = 0; 3015 stat->blksize = 65536; 3016 /* 3017 * Some applications rely on the number of st_nlink 3018 * value on directories to be either 0 (if unlinked) 3019 * or 2 + number of subdirectories. 3020 */ 3021 if (stat->nlink == 1) 3022 /* '.' + '..' + subdirs */ 3023 stat->nlink = 1 + 1 + ci->i_subdirs; 3024 } 3025 3026 stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC; 3027 if (IS_ENCRYPTED(inode)) 3028 stat->attributes |= STATX_ATTR_ENCRYPTED; 3029 stat->attributes_mask |= (STATX_ATTR_CHANGE_MONOTONIC | 3030 STATX_ATTR_ENCRYPTED); 3031 3032 stat->result_mask = request_mask & valid_mask; 3033 return err; 3034 } 3035 3036 void ceph_inode_shutdown(struct inode *inode) 3037 { 3038 struct ceph_inode_info *ci = ceph_inode(inode); 3039 struct rb_node *p; 3040 int iputs = 0; 3041 bool invalidate = false; 3042 3043 spin_lock(&ci->i_ceph_lock); 3044 ci->i_ceph_flags |= CEPH_I_SHUTDOWN; 3045 p = rb_first(&ci->i_caps); 3046 while (p) { 3047 struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); 3048 3049 p = rb_next(p); 3050 iputs += ceph_purge_inode_cap(inode, cap, &invalidate); 3051 } 3052 spin_unlock(&ci->i_ceph_lock); 3053 3054 if (invalidate) 3055 ceph_queue_invalidate(inode); 3056 while (iputs--) 3057 iput(inode); 3058 } 3059