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("%s truncate_seq %u -> %u\n", __func__, 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 } 791 792 /* 793 * It's possible that the new sizes of the two consecutive 794 * size truncations will be in the same fscrypt last block, 795 * and we need to truncate the corresponding page caches 796 * anyway. 797 */ 798 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0) { 799 dout("%s truncate_size %lld -> %llu, encrypted %d\n", __func__, 800 ci->i_truncate_size, truncate_size, !!IS_ENCRYPTED(inode)); 801 802 ci->i_truncate_size = truncate_size; 803 804 if (IS_ENCRYPTED(inode)) { 805 dout("%s truncate_pagecache_size %lld -> %llu\n", 806 __func__, ci->i_truncate_pagecache_size, size); 807 ci->i_truncate_pagecache_size = size; 808 } else { 809 ci->i_truncate_pagecache_size = truncate_size; 810 } 811 } 812 return queue_trunc; 813 } 814 815 void ceph_fill_file_time(struct inode *inode, int issued, 816 u64 time_warp_seq, struct timespec64 *ctime, 817 struct timespec64 *mtime, struct timespec64 *atime) 818 { 819 struct ceph_inode_info *ci = ceph_inode(inode); 820 int warn = 0; 821 822 if (issued & (CEPH_CAP_FILE_EXCL| 823 CEPH_CAP_FILE_WR| 824 CEPH_CAP_FILE_BUFFER| 825 CEPH_CAP_AUTH_EXCL| 826 CEPH_CAP_XATTR_EXCL)) { 827 if (ci->i_version == 0 || 828 timespec64_compare(ctime, &inode->i_ctime) > 0) { 829 dout("ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n", 830 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 831 ctime->tv_sec, ctime->tv_nsec); 832 inode->i_ctime = *ctime; 833 } 834 if (ci->i_version == 0 || 835 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { 836 /* the MDS did a utimes() */ 837 dout("mtime %lld.%09ld -> %lld.%09ld " 838 "tw %d -> %d\n", 839 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 840 mtime->tv_sec, mtime->tv_nsec, 841 ci->i_time_warp_seq, (int)time_warp_seq); 842 843 inode->i_mtime = *mtime; 844 inode->i_atime = *atime; 845 ci->i_time_warp_seq = time_warp_seq; 846 } else if (time_warp_seq == ci->i_time_warp_seq) { 847 /* nobody did utimes(); take the max */ 848 if (timespec64_compare(mtime, &inode->i_mtime) > 0) { 849 dout("mtime %lld.%09ld -> %lld.%09ld inc\n", 850 inode->i_mtime.tv_sec, 851 inode->i_mtime.tv_nsec, 852 mtime->tv_sec, mtime->tv_nsec); 853 inode->i_mtime = *mtime; 854 } 855 if (timespec64_compare(atime, &inode->i_atime) > 0) { 856 dout("atime %lld.%09ld -> %lld.%09ld inc\n", 857 inode->i_atime.tv_sec, 858 inode->i_atime.tv_nsec, 859 atime->tv_sec, atime->tv_nsec); 860 inode->i_atime = *atime; 861 } 862 } else if (issued & CEPH_CAP_FILE_EXCL) { 863 /* we did a utimes(); ignore mds values */ 864 } else { 865 warn = 1; 866 } 867 } else { 868 /* we have no write|excl caps; whatever the MDS says is true */ 869 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { 870 inode->i_ctime = *ctime; 871 inode->i_mtime = *mtime; 872 inode->i_atime = *atime; 873 ci->i_time_warp_seq = time_warp_seq; 874 } else { 875 warn = 1; 876 } 877 } 878 if (warn) /* time_warp_seq shouldn't go backwards */ 879 dout("%p mds time_warp_seq %llu < %u\n", 880 inode, time_warp_seq, ci->i_time_warp_seq); 881 } 882 883 #if IS_ENABLED(CONFIG_FS_ENCRYPTION) 884 static int decode_encrypted_symlink(const char *encsym, int enclen, u8 **decsym) 885 { 886 int declen; 887 u8 *sym; 888 889 sym = kmalloc(enclen + 1, GFP_NOFS); 890 if (!sym) 891 return -ENOMEM; 892 893 declen = ceph_base64_decode(encsym, enclen, sym); 894 if (declen < 0) { 895 pr_err("%s: can't decode symlink (%d). Content: %.*s\n", 896 __func__, declen, enclen, encsym); 897 kfree(sym); 898 return -EIO; 899 } 900 sym[declen + 1] = '\0'; 901 *decsym = sym; 902 return declen; 903 } 904 #else 905 static int decode_encrypted_symlink(const char *encsym, int symlen, u8 **decsym) 906 { 907 return -EOPNOTSUPP; 908 } 909 #endif 910 911 /* 912 * Populate an inode based on info from mds. May be called on new or 913 * existing inodes. 914 */ 915 int ceph_fill_inode(struct inode *inode, struct page *locked_page, 916 struct ceph_mds_reply_info_in *iinfo, 917 struct ceph_mds_reply_dirfrag *dirinfo, 918 struct ceph_mds_session *session, int cap_fmode, 919 struct ceph_cap_reservation *caps_reservation) 920 { 921 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 922 struct ceph_mds_reply_inode *info = iinfo->in; 923 struct ceph_inode_info *ci = ceph_inode(inode); 924 int issued, new_issued, info_caps; 925 struct timespec64 mtime, atime, ctime; 926 struct ceph_buffer *xattr_blob = NULL; 927 struct ceph_buffer *old_blob = NULL; 928 struct ceph_string *pool_ns = NULL; 929 struct ceph_cap *new_cap = NULL; 930 int err = 0; 931 bool wake = false; 932 bool queue_trunc = false; 933 bool new_version = false; 934 bool fill_inline = false; 935 umode_t mode = le32_to_cpu(info->mode); 936 dev_t rdev = le32_to_cpu(info->rdev); 937 938 lockdep_assert_held(&mdsc->snap_rwsem); 939 940 dout("%s %p ino %llx.%llx v %llu had %llu\n", __func__, 941 inode, ceph_vinop(inode), le64_to_cpu(info->version), 942 ci->i_version); 943 944 /* Once I_NEW is cleared, we can't change type or dev numbers */ 945 if (inode->i_state & I_NEW) { 946 inode->i_mode = mode; 947 } else { 948 if (inode_wrong_type(inode, mode)) { 949 pr_warn_once("inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n", 950 ceph_vinop(inode), inode->i_mode, mode); 951 return -ESTALE; 952 } 953 954 if ((S_ISCHR(mode) || S_ISBLK(mode)) && inode->i_rdev != rdev) { 955 pr_warn_once("dev inode rdev changed! (ino %llx.%llx is %u:%u, mds says %u:%u)\n", 956 ceph_vinop(inode), MAJOR(inode->i_rdev), 957 MINOR(inode->i_rdev), MAJOR(rdev), 958 MINOR(rdev)); 959 return -ESTALE; 960 } 961 } 962 963 info_caps = le32_to_cpu(info->cap.caps); 964 965 /* prealloc new cap struct */ 966 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) { 967 new_cap = ceph_get_cap(mdsc, caps_reservation); 968 if (!new_cap) 969 return -ENOMEM; 970 } 971 972 /* 973 * prealloc xattr data, if it looks like we'll need it. only 974 * if len > 4 (meaning there are actually xattrs; the first 4 975 * bytes are the xattr count). 976 */ 977 if (iinfo->xattr_len > 4) { 978 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); 979 if (!xattr_blob) 980 pr_err("%s ENOMEM xattr blob %d bytes\n", __func__, 981 iinfo->xattr_len); 982 } 983 984 if (iinfo->pool_ns_len > 0) 985 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data, 986 iinfo->pool_ns_len); 987 988 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map) 989 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode)); 990 991 spin_lock(&ci->i_ceph_lock); 992 993 /* 994 * provided version will be odd if inode value is projected, 995 * even if stable. skip the update if we have newer stable 996 * info (ours>=theirs, e.g. due to racing mds replies), unless 997 * we are getting projected (unstable) info (in which case the 998 * version is odd, and we want ours>theirs). 999 * us them 1000 * 2 2 skip 1001 * 3 2 skip 1002 * 3 3 update 1003 */ 1004 if (ci->i_version == 0 || 1005 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 1006 le64_to_cpu(info->version) > (ci->i_version & ~1))) 1007 new_version = true; 1008 1009 /* Update change_attribute */ 1010 inode_set_max_iversion_raw(inode, iinfo->change_attr); 1011 1012 __ceph_caps_issued(ci, &issued); 1013 issued |= __ceph_caps_dirty(ci); 1014 new_issued = ~issued & info_caps; 1015 1016 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files); 1017 1018 #ifdef CONFIG_FS_ENCRYPTION 1019 if (iinfo->fscrypt_auth_len && 1020 ((inode->i_state & I_NEW) || (ci->fscrypt_auth_len == 0))) { 1021 kfree(ci->fscrypt_auth); 1022 ci->fscrypt_auth_len = iinfo->fscrypt_auth_len; 1023 ci->fscrypt_auth = iinfo->fscrypt_auth; 1024 iinfo->fscrypt_auth = NULL; 1025 iinfo->fscrypt_auth_len = 0; 1026 inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED); 1027 } 1028 #endif 1029 1030 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && 1031 (issued & CEPH_CAP_AUTH_EXCL) == 0) { 1032 inode->i_mode = mode; 1033 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); 1034 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); 1035 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, 1036 from_kuid(&init_user_ns, inode->i_uid), 1037 from_kgid(&init_user_ns, inode->i_gid)); 1038 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime); 1039 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime); 1040 } 1041 1042 /* directories have fl_stripe_unit set to zero */ 1043 if (IS_ENCRYPTED(inode)) 1044 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT; 1045 else if (le32_to_cpu(info->layout.fl_stripe_unit)) 1046 inode->i_blkbits = 1047 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; 1048 else 1049 inode->i_blkbits = CEPH_BLOCK_SHIFT; 1050 1051 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && 1052 (issued & CEPH_CAP_LINK_EXCL) == 0) 1053 set_nlink(inode, le32_to_cpu(info->nlink)); 1054 1055 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { 1056 /* be careful with mtime, atime, size */ 1057 ceph_decode_timespec64(&atime, &info->atime); 1058 ceph_decode_timespec64(&mtime, &info->mtime); 1059 ceph_decode_timespec64(&ctime, &info->ctime); 1060 ceph_fill_file_time(inode, issued, 1061 le32_to_cpu(info->time_warp_seq), 1062 &ctime, &mtime, &atime); 1063 } 1064 1065 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) { 1066 ci->i_files = le64_to_cpu(info->files); 1067 ci->i_subdirs = le64_to_cpu(info->subdirs); 1068 } 1069 1070 if (new_version || 1071 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { 1072 u64 size = le64_to_cpu(info->size); 1073 s64 old_pool = ci->i_layout.pool_id; 1074 struct ceph_string *old_ns; 1075 1076 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout); 1077 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, 1078 lockdep_is_held(&ci->i_ceph_lock)); 1079 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns); 1080 1081 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns) 1082 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; 1083 1084 pool_ns = old_ns; 1085 1086 if (IS_ENCRYPTED(inode) && size && 1087 iinfo->fscrypt_file_len == sizeof(__le64)) { 1088 u64 fsize = __le64_to_cpu(*(__le64 *)iinfo->fscrypt_file); 1089 1090 if (size == round_up(fsize, CEPH_FSCRYPT_BLOCK_SIZE)) { 1091 size = fsize; 1092 } else { 1093 pr_warn("fscrypt size mismatch: size=%llu fscrypt_file=%llu, discarding fscrypt_file size.\n", 1094 info->size, size); 1095 } 1096 } 1097 1098 queue_trunc = ceph_fill_file_size(inode, issued, 1099 le32_to_cpu(info->truncate_seq), 1100 le64_to_cpu(info->truncate_size), 1101 size); 1102 /* only update max_size on auth cap */ 1103 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 1104 ci->i_max_size != le64_to_cpu(info->max_size)) { 1105 dout("max_size %lld -> %llu\n", ci->i_max_size, 1106 le64_to_cpu(info->max_size)); 1107 ci->i_max_size = le64_to_cpu(info->max_size); 1108 } 1109 } 1110 1111 /* layout and rstat are not tracked by capability, update them if 1112 * the inode info is from auth mds */ 1113 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) { 1114 if (S_ISDIR(inode->i_mode)) { 1115 ci->i_dir_layout = iinfo->dir_layout; 1116 ci->i_rbytes = le64_to_cpu(info->rbytes); 1117 ci->i_rfiles = le64_to_cpu(info->rfiles); 1118 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); 1119 ci->i_dir_pin = iinfo->dir_pin; 1120 ci->i_rsnaps = iinfo->rsnaps; 1121 ceph_decode_timespec64(&ci->i_rctime, &info->rctime); 1122 } 1123 } 1124 1125 /* xattrs */ 1126 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ 1127 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && 1128 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { 1129 if (ci->i_xattrs.blob) 1130 old_blob = ci->i_xattrs.blob; 1131 ci->i_xattrs.blob = xattr_blob; 1132 if (xattr_blob) 1133 memcpy(ci->i_xattrs.blob->vec.iov_base, 1134 iinfo->xattr_data, iinfo->xattr_len); 1135 ci->i_xattrs.version = le64_to_cpu(info->xattr_version); 1136 ceph_forget_all_cached_acls(inode); 1137 ceph_security_invalidate_secctx(inode); 1138 xattr_blob = NULL; 1139 } 1140 1141 /* finally update i_version */ 1142 if (le64_to_cpu(info->version) > ci->i_version) 1143 ci->i_version = le64_to_cpu(info->version); 1144 1145 inode->i_mapping->a_ops = &ceph_aops; 1146 1147 switch (inode->i_mode & S_IFMT) { 1148 case S_IFIFO: 1149 case S_IFBLK: 1150 case S_IFCHR: 1151 case S_IFSOCK: 1152 inode->i_blkbits = PAGE_SHIFT; 1153 init_special_inode(inode, inode->i_mode, rdev); 1154 inode->i_op = &ceph_file_iops; 1155 break; 1156 case S_IFREG: 1157 inode->i_op = &ceph_file_iops; 1158 inode->i_fop = &ceph_file_fops; 1159 break; 1160 case S_IFLNK: 1161 if (!ci->i_symlink) { 1162 u32 symlen = iinfo->symlink_len; 1163 char *sym; 1164 1165 spin_unlock(&ci->i_ceph_lock); 1166 1167 if (IS_ENCRYPTED(inode)) { 1168 if (symlen != i_size_read(inode)) 1169 pr_err("%s %llx.%llx BAD symlink size %lld\n", 1170 __func__, ceph_vinop(inode), 1171 i_size_read(inode)); 1172 1173 err = decode_encrypted_symlink(iinfo->symlink, 1174 symlen, (u8 **)&sym); 1175 if (err < 0) { 1176 pr_err("%s decoding encrypted symlink failed: %d\n", 1177 __func__, err); 1178 goto out; 1179 } 1180 symlen = err; 1181 i_size_write(inode, symlen); 1182 inode->i_blocks = calc_inode_blocks(symlen); 1183 } else { 1184 if (symlen != i_size_read(inode)) { 1185 pr_err("%s %llx.%llx BAD symlink size %lld\n", 1186 __func__, ceph_vinop(inode), 1187 i_size_read(inode)); 1188 i_size_write(inode, symlen); 1189 inode->i_blocks = calc_inode_blocks(symlen); 1190 } 1191 1192 err = -ENOMEM; 1193 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); 1194 if (!sym) 1195 goto out; 1196 } 1197 1198 spin_lock(&ci->i_ceph_lock); 1199 if (!ci->i_symlink) 1200 ci->i_symlink = sym; 1201 else 1202 kfree(sym); /* lost a race */ 1203 } 1204 1205 if (IS_ENCRYPTED(inode)) { 1206 /* 1207 * Encrypted symlinks need to be decrypted before we can 1208 * cache their targets in i_link. Don't touch it here. 1209 */ 1210 inode->i_op = &ceph_encrypted_symlink_iops; 1211 } else { 1212 inode->i_link = ci->i_symlink; 1213 inode->i_op = &ceph_symlink_iops; 1214 } 1215 break; 1216 case S_IFDIR: 1217 inode->i_op = &ceph_dir_iops; 1218 inode->i_fop = &ceph_dir_fops; 1219 break; 1220 default: 1221 pr_err("%s %llx.%llx BAD mode 0%o\n", __func__, 1222 ceph_vinop(inode), inode->i_mode); 1223 } 1224 1225 /* were we issued a capability? */ 1226 if (info_caps) { 1227 if (ceph_snap(inode) == CEPH_NOSNAP) { 1228 ceph_add_cap(inode, session, 1229 le64_to_cpu(info->cap.cap_id), 1230 info_caps, 1231 le32_to_cpu(info->cap.wanted), 1232 le32_to_cpu(info->cap.seq), 1233 le32_to_cpu(info->cap.mseq), 1234 le64_to_cpu(info->cap.realm), 1235 info->cap.flags, &new_cap); 1236 1237 /* set dir completion flag? */ 1238 if (S_ISDIR(inode->i_mode) && 1239 ci->i_files == 0 && ci->i_subdirs == 0 && 1240 (info_caps & CEPH_CAP_FILE_SHARED) && 1241 (issued & CEPH_CAP_FILE_EXCL) == 0 && 1242 !__ceph_dir_is_complete(ci)) { 1243 dout(" marking %p complete (empty)\n", inode); 1244 i_size_write(inode, 0); 1245 __ceph_dir_set_complete(ci, 1246 atomic64_read(&ci->i_release_count), 1247 atomic64_read(&ci->i_ordered_count)); 1248 } 1249 1250 wake = true; 1251 } else { 1252 dout(" %p got snap_caps %s\n", inode, 1253 ceph_cap_string(info_caps)); 1254 ci->i_snap_caps |= info_caps; 1255 } 1256 } 1257 1258 if (iinfo->inline_version > 0 && 1259 iinfo->inline_version >= ci->i_inline_version) { 1260 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; 1261 ci->i_inline_version = iinfo->inline_version; 1262 if (ceph_has_inline_data(ci) && 1263 (locked_page || (info_caps & cache_caps))) 1264 fill_inline = true; 1265 } 1266 1267 if (cap_fmode >= 0) { 1268 if (!info_caps) 1269 pr_warn("mds issued no caps on %llx.%llx\n", 1270 ceph_vinop(inode)); 1271 __ceph_touch_fmode(ci, mdsc, cap_fmode); 1272 } 1273 1274 spin_unlock(&ci->i_ceph_lock); 1275 1276 ceph_fscache_register_inode_cookie(inode); 1277 1278 if (fill_inline) 1279 ceph_fill_inline_data(inode, locked_page, 1280 iinfo->inline_data, iinfo->inline_len); 1281 1282 if (wake) 1283 wake_up_all(&ci->i_cap_wq); 1284 1285 /* queue truncate if we saw i_size decrease */ 1286 if (queue_trunc) 1287 ceph_queue_vmtruncate(inode); 1288 1289 /* populate frag tree */ 1290 if (S_ISDIR(inode->i_mode)) 1291 ceph_fill_fragtree(inode, &info->fragtree, dirinfo); 1292 1293 /* update delegation info? */ 1294 if (dirinfo) 1295 ceph_fill_dirfrag(inode, dirinfo); 1296 1297 err = 0; 1298 out: 1299 if (new_cap) 1300 ceph_put_cap(mdsc, new_cap); 1301 ceph_buffer_put(old_blob); 1302 ceph_buffer_put(xattr_blob); 1303 ceph_put_string(pool_ns); 1304 return err; 1305 } 1306 1307 /* 1308 * caller should hold session s_mutex and dentry->d_lock. 1309 */ 1310 static void __update_dentry_lease(struct inode *dir, struct dentry *dentry, 1311 struct ceph_mds_reply_lease *lease, 1312 struct ceph_mds_session *session, 1313 unsigned long from_time, 1314 struct ceph_mds_session **old_lease_session) 1315 { 1316 struct ceph_dentry_info *di = ceph_dentry(dentry); 1317 unsigned mask = le16_to_cpu(lease->mask); 1318 long unsigned duration = le32_to_cpu(lease->duration_ms); 1319 long unsigned ttl = from_time + (duration * HZ) / 1000; 1320 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; 1321 1322 dout("update_dentry_lease %p duration %lu ms ttl %lu\n", 1323 dentry, duration, ttl); 1324 1325 /* only track leases on regular dentries */ 1326 if (ceph_snap(dir) != CEPH_NOSNAP) 1327 return; 1328 1329 if (mask & CEPH_LEASE_PRIMARY_LINK) 1330 di->flags |= CEPH_DENTRY_PRIMARY_LINK; 1331 else 1332 di->flags &= ~CEPH_DENTRY_PRIMARY_LINK; 1333 1334 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen); 1335 if (!(mask & CEPH_LEASE_VALID)) { 1336 __ceph_dentry_dir_lease_touch(di); 1337 return; 1338 } 1339 1340 if (di->lease_gen == atomic_read(&session->s_cap_gen) && 1341 time_before(ttl, di->time)) 1342 return; /* we already have a newer lease. */ 1343 1344 if (di->lease_session && di->lease_session != session) { 1345 *old_lease_session = di->lease_session; 1346 di->lease_session = NULL; 1347 } 1348 1349 if (!di->lease_session) 1350 di->lease_session = ceph_get_mds_session(session); 1351 di->lease_gen = atomic_read(&session->s_cap_gen); 1352 di->lease_seq = le32_to_cpu(lease->seq); 1353 di->lease_renew_after = half_ttl; 1354 di->lease_renew_from = 0; 1355 di->time = ttl; 1356 1357 __ceph_dentry_lease_touch(di); 1358 } 1359 1360 static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry, 1361 struct ceph_mds_reply_lease *lease, 1362 struct ceph_mds_session *session, 1363 unsigned long from_time) 1364 { 1365 struct ceph_mds_session *old_lease_session = NULL; 1366 spin_lock(&dentry->d_lock); 1367 __update_dentry_lease(dir, dentry, lease, session, from_time, 1368 &old_lease_session); 1369 spin_unlock(&dentry->d_lock); 1370 ceph_put_mds_session(old_lease_session); 1371 } 1372 1373 /* 1374 * update dentry lease without having parent inode locked 1375 */ 1376 static void update_dentry_lease_careful(struct dentry *dentry, 1377 struct ceph_mds_reply_lease *lease, 1378 struct ceph_mds_session *session, 1379 unsigned long from_time, 1380 char *dname, u32 dname_len, 1381 struct ceph_vino *pdvino, 1382 struct ceph_vino *ptvino) 1383 1384 { 1385 struct inode *dir; 1386 struct ceph_mds_session *old_lease_session = NULL; 1387 1388 spin_lock(&dentry->d_lock); 1389 /* make sure dentry's name matches target */ 1390 if (dentry->d_name.len != dname_len || 1391 memcmp(dentry->d_name.name, dname, dname_len)) 1392 goto out_unlock; 1393 1394 dir = d_inode(dentry->d_parent); 1395 /* make sure parent matches dvino */ 1396 if (!ceph_ino_compare(dir, pdvino)) 1397 goto out_unlock; 1398 1399 /* make sure dentry's inode matches target. NULL ptvino means that 1400 * we expect a negative dentry */ 1401 if (ptvino) { 1402 if (d_really_is_negative(dentry)) 1403 goto out_unlock; 1404 if (!ceph_ino_compare(d_inode(dentry), ptvino)) 1405 goto out_unlock; 1406 } else { 1407 if (d_really_is_positive(dentry)) 1408 goto out_unlock; 1409 } 1410 1411 __update_dentry_lease(dir, dentry, lease, session, 1412 from_time, &old_lease_session); 1413 out_unlock: 1414 spin_unlock(&dentry->d_lock); 1415 ceph_put_mds_session(old_lease_session); 1416 } 1417 1418 /* 1419 * splice a dentry to an inode. 1420 * caller must hold directory i_rwsem for this to be safe. 1421 */ 1422 static int splice_dentry(struct dentry **pdn, struct inode *in) 1423 { 1424 struct dentry *dn = *pdn; 1425 struct dentry *realdn; 1426 1427 BUG_ON(d_inode(dn)); 1428 1429 if (S_ISDIR(in->i_mode)) { 1430 /* If inode is directory, d_splice_alias() below will remove 1431 * 'realdn' from its origin parent. We need to ensure that 1432 * origin parent's readdir cache will not reference 'realdn' 1433 */ 1434 realdn = d_find_any_alias(in); 1435 if (realdn) { 1436 struct ceph_dentry_info *di = ceph_dentry(realdn); 1437 spin_lock(&realdn->d_lock); 1438 1439 realdn->d_op->d_prune(realdn); 1440 1441 di->time = jiffies; 1442 di->lease_shared_gen = 0; 1443 di->offset = 0; 1444 1445 spin_unlock(&realdn->d_lock); 1446 dput(realdn); 1447 } 1448 } 1449 1450 /* dn must be unhashed */ 1451 if (!d_unhashed(dn)) 1452 d_drop(dn); 1453 realdn = d_splice_alias(in, dn); 1454 if (IS_ERR(realdn)) { 1455 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", 1456 PTR_ERR(realdn), dn, in, ceph_vinop(in)); 1457 return PTR_ERR(realdn); 1458 } 1459 1460 if (realdn) { 1461 dout("dn %p (%d) spliced with %p (%d) " 1462 "inode %p ino %llx.%llx\n", 1463 dn, d_count(dn), 1464 realdn, d_count(realdn), 1465 d_inode(realdn), ceph_vinop(d_inode(realdn))); 1466 dput(dn); 1467 *pdn = realdn; 1468 } else { 1469 BUG_ON(!ceph_dentry(dn)); 1470 dout("dn %p attached to %p ino %llx.%llx\n", 1471 dn, d_inode(dn), ceph_vinop(d_inode(dn))); 1472 } 1473 return 0; 1474 } 1475 1476 /* 1477 * Incorporate results into the local cache. This is either just 1478 * one inode, or a directory, dentry, and possibly linked-to inode (e.g., 1479 * after a lookup). 1480 * 1481 * A reply may contain 1482 * a directory inode along with a dentry. 1483 * and/or a target inode 1484 * 1485 * Called with snap_rwsem (read). 1486 */ 1487 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) 1488 { 1489 struct ceph_mds_session *session = req->r_session; 1490 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1491 struct inode *in = NULL; 1492 struct ceph_vino tvino, dvino; 1493 struct ceph_fs_client *fsc = ceph_sb_to_client(sb); 1494 int err = 0; 1495 1496 dout("fill_trace %p is_dentry %d is_target %d\n", req, 1497 rinfo->head->is_dentry, rinfo->head->is_target); 1498 1499 if (!rinfo->head->is_target && !rinfo->head->is_dentry) { 1500 dout("fill_trace reply is empty!\n"); 1501 if (rinfo->head->result == 0 && req->r_parent) 1502 ceph_invalidate_dir_request(req); 1503 return 0; 1504 } 1505 1506 if (rinfo->head->is_dentry) { 1507 struct inode *dir = req->r_parent; 1508 1509 if (dir) { 1510 err = ceph_fill_inode(dir, NULL, &rinfo->diri, 1511 rinfo->dirfrag, session, -1, 1512 &req->r_caps_reservation); 1513 if (err < 0) 1514 goto done; 1515 } else { 1516 WARN_ON_ONCE(1); 1517 } 1518 1519 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME && 1520 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1521 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1522 bool is_nokey = false; 1523 struct qstr dname; 1524 struct dentry *dn, *parent; 1525 struct fscrypt_str oname = FSTR_INIT(NULL, 0); 1526 struct ceph_fname fname = { .dir = dir, 1527 .name = rinfo->dname, 1528 .ctext = rinfo->altname, 1529 .name_len = rinfo->dname_len, 1530 .ctext_len = rinfo->altname_len }; 1531 1532 BUG_ON(!rinfo->head->is_target); 1533 BUG_ON(req->r_dentry); 1534 1535 parent = d_find_any_alias(dir); 1536 BUG_ON(!parent); 1537 1538 err = ceph_fname_alloc_buffer(dir, &oname); 1539 if (err < 0) { 1540 dput(parent); 1541 goto done; 1542 } 1543 1544 err = ceph_fname_to_usr(&fname, NULL, &oname, &is_nokey); 1545 if (err < 0) { 1546 dput(parent); 1547 ceph_fname_free_buffer(dir, &oname); 1548 goto done; 1549 } 1550 dname.name = oname.name; 1551 dname.len = oname.len; 1552 dname.hash = full_name_hash(parent, dname.name, dname.len); 1553 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1554 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1555 retry_lookup: 1556 dn = d_lookup(parent, &dname); 1557 dout("d_lookup on parent=%p name=%.*s got %p\n", 1558 parent, dname.len, dname.name, dn); 1559 1560 if (!dn) { 1561 dn = d_alloc(parent, &dname); 1562 dout("d_alloc %p '%.*s' = %p\n", parent, 1563 dname.len, dname.name, dn); 1564 if (!dn) { 1565 dput(parent); 1566 ceph_fname_free_buffer(dir, &oname); 1567 err = -ENOMEM; 1568 goto done; 1569 } 1570 if (is_nokey) { 1571 spin_lock(&dn->d_lock); 1572 dn->d_flags |= DCACHE_NOKEY_NAME; 1573 spin_unlock(&dn->d_lock); 1574 } 1575 err = 0; 1576 } else if (d_really_is_positive(dn) && 1577 (ceph_ino(d_inode(dn)) != tvino.ino || 1578 ceph_snap(d_inode(dn)) != tvino.snap)) { 1579 dout(" dn %p points to wrong inode %p\n", 1580 dn, d_inode(dn)); 1581 ceph_dir_clear_ordered(dir); 1582 d_delete(dn); 1583 dput(dn); 1584 goto retry_lookup; 1585 } 1586 ceph_fname_free_buffer(dir, &oname); 1587 1588 req->r_dentry = dn; 1589 dput(parent); 1590 } 1591 } 1592 1593 if (rinfo->head->is_target) { 1594 /* Should be filled in by handle_reply */ 1595 BUG_ON(!req->r_target_inode); 1596 1597 in = req->r_target_inode; 1598 err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti, 1599 NULL, session, 1600 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1601 !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) && 1602 rinfo->head->result == 0) ? req->r_fmode : -1, 1603 &req->r_caps_reservation); 1604 if (err < 0) { 1605 pr_err("ceph_fill_inode badness %p %llx.%llx\n", 1606 in, ceph_vinop(in)); 1607 req->r_target_inode = NULL; 1608 if (in->i_state & I_NEW) 1609 discard_new_inode(in); 1610 else 1611 iput(in); 1612 goto done; 1613 } 1614 if (in->i_state & I_NEW) 1615 unlock_new_inode(in); 1616 } 1617 1618 /* 1619 * ignore null lease/binding on snapdir ENOENT, or else we 1620 * will have trouble splicing in the virtual snapdir later 1621 */ 1622 if (rinfo->head->is_dentry && 1623 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1624 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1625 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, 1626 fsc->mount_options->snapdir_name, 1627 req->r_dentry->d_name.len))) { 1628 /* 1629 * lookup link rename : null -> possibly existing inode 1630 * mknod symlink mkdir : null -> new inode 1631 * unlink : linked -> null 1632 */ 1633 struct inode *dir = req->r_parent; 1634 struct dentry *dn = req->r_dentry; 1635 bool have_dir_cap, have_lease; 1636 1637 BUG_ON(!dn); 1638 BUG_ON(!dir); 1639 BUG_ON(d_inode(dn->d_parent) != dir); 1640 1641 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1642 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1643 1644 BUG_ON(ceph_ino(dir) != dvino.ino); 1645 BUG_ON(ceph_snap(dir) != dvino.snap); 1646 1647 /* do we have a lease on the whole dir? */ 1648 have_dir_cap = 1649 (le32_to_cpu(rinfo->diri.in->cap.caps) & 1650 CEPH_CAP_FILE_SHARED); 1651 1652 /* do we have a dn lease? */ 1653 have_lease = have_dir_cap || 1654 le32_to_cpu(rinfo->dlease->duration_ms); 1655 if (!have_lease) 1656 dout("fill_trace no dentry lease or dir cap\n"); 1657 1658 /* rename? */ 1659 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { 1660 struct inode *olddir = req->r_old_dentry_dir; 1661 BUG_ON(!olddir); 1662 1663 dout(" src %p '%pd' dst %p '%pd'\n", 1664 req->r_old_dentry, 1665 req->r_old_dentry, 1666 dn, dn); 1667 dout("fill_trace doing d_move %p -> %p\n", 1668 req->r_old_dentry, dn); 1669 1670 /* d_move screws up sibling dentries' offsets */ 1671 ceph_dir_clear_ordered(dir); 1672 ceph_dir_clear_ordered(olddir); 1673 1674 d_move(req->r_old_dentry, dn); 1675 dout(" src %p '%pd' dst %p '%pd'\n", 1676 req->r_old_dentry, 1677 req->r_old_dentry, 1678 dn, dn); 1679 1680 /* ensure target dentry is invalidated, despite 1681 rehashing bug in vfs_rename_dir */ 1682 ceph_invalidate_dentry_lease(dn); 1683 1684 dout("dn %p gets new offset %lld\n", req->r_old_dentry, 1685 ceph_dentry(req->r_old_dentry)->offset); 1686 1687 /* swap r_dentry and r_old_dentry in case that 1688 * splice_dentry() gets called later. This is safe 1689 * because no other place will use them */ 1690 req->r_dentry = req->r_old_dentry; 1691 req->r_old_dentry = dn; 1692 dn = req->r_dentry; 1693 } 1694 1695 /* null dentry? */ 1696 if (!rinfo->head->is_target) { 1697 dout("fill_trace null dentry\n"); 1698 if (d_really_is_positive(dn)) { 1699 dout("d_delete %p\n", dn); 1700 ceph_dir_clear_ordered(dir); 1701 d_delete(dn); 1702 } else if (have_lease) { 1703 if (d_unhashed(dn)) 1704 d_add(dn, NULL); 1705 } 1706 1707 if (!d_unhashed(dn) && have_lease) 1708 update_dentry_lease(dir, dn, 1709 rinfo->dlease, session, 1710 req->r_request_started); 1711 goto done; 1712 } 1713 1714 /* attach proper inode */ 1715 if (d_really_is_negative(dn)) { 1716 ceph_dir_clear_ordered(dir); 1717 ihold(in); 1718 err = splice_dentry(&req->r_dentry, in); 1719 if (err < 0) 1720 goto done; 1721 dn = req->r_dentry; /* may have spliced */ 1722 } else if (d_really_is_positive(dn) && d_inode(dn) != in) { 1723 dout(" %p links to %p %llx.%llx, not %llx.%llx\n", 1724 dn, d_inode(dn), ceph_vinop(d_inode(dn)), 1725 ceph_vinop(in)); 1726 d_invalidate(dn); 1727 have_lease = false; 1728 } 1729 1730 if (have_lease) { 1731 update_dentry_lease(dir, dn, 1732 rinfo->dlease, session, 1733 req->r_request_started); 1734 } 1735 dout(" final dn %p\n", dn); 1736 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || 1737 req->r_op == CEPH_MDS_OP_MKSNAP) && 1738 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1739 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1740 struct inode *dir = req->r_parent; 1741 1742 /* fill out a snapdir LOOKUPSNAP dentry */ 1743 BUG_ON(!dir); 1744 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); 1745 BUG_ON(!req->r_dentry); 1746 dout(" linking snapped dir %p to dn %p\n", in, req->r_dentry); 1747 ceph_dir_clear_ordered(dir); 1748 ihold(in); 1749 err = splice_dentry(&req->r_dentry, in); 1750 if (err < 0) 1751 goto done; 1752 } else if (rinfo->head->is_dentry && req->r_dentry) { 1753 /* parent inode is not locked, be carefull */ 1754 struct ceph_vino *ptvino = NULL; 1755 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1756 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1757 if (rinfo->head->is_target) { 1758 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1759 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1760 ptvino = &tvino; 1761 } 1762 update_dentry_lease_careful(req->r_dentry, rinfo->dlease, 1763 session, req->r_request_started, 1764 rinfo->dname, rinfo->dname_len, 1765 &dvino, ptvino); 1766 } 1767 done: 1768 dout("fill_trace done err=%d\n", err); 1769 return err; 1770 } 1771 1772 /* 1773 * Prepopulate our cache with readdir results, leases, etc. 1774 */ 1775 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, 1776 struct ceph_mds_session *session) 1777 { 1778 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1779 int i, err = 0; 1780 1781 for (i = 0; i < rinfo->dir_nr; i++) { 1782 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1783 struct ceph_vino vino; 1784 struct inode *in; 1785 int rc; 1786 1787 vino.ino = le64_to_cpu(rde->inode.in->ino); 1788 vino.snap = le64_to_cpu(rde->inode.in->snapid); 1789 1790 in = ceph_get_inode(req->r_dentry->d_sb, vino, NULL); 1791 if (IS_ERR(in)) { 1792 err = PTR_ERR(in); 1793 dout("new_inode badness got %d\n", err); 1794 continue; 1795 } 1796 rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 1797 -1, &req->r_caps_reservation); 1798 if (rc < 0) { 1799 pr_err("ceph_fill_inode badness on %p got %d\n", 1800 in, rc); 1801 err = rc; 1802 if (in->i_state & I_NEW) { 1803 ihold(in); 1804 discard_new_inode(in); 1805 } 1806 } else if (in->i_state & I_NEW) { 1807 unlock_new_inode(in); 1808 } 1809 1810 iput(in); 1811 } 1812 1813 return err; 1814 } 1815 1816 void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl) 1817 { 1818 if (ctl->page) { 1819 kunmap(ctl->page); 1820 put_page(ctl->page); 1821 ctl->page = NULL; 1822 } 1823 } 1824 1825 static int fill_readdir_cache(struct inode *dir, struct dentry *dn, 1826 struct ceph_readdir_cache_control *ctl, 1827 struct ceph_mds_request *req) 1828 { 1829 struct ceph_inode_info *ci = ceph_inode(dir); 1830 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*); 1831 unsigned idx = ctl->index % nsize; 1832 pgoff_t pgoff = ctl->index / nsize; 1833 1834 if (!ctl->page || pgoff != page_index(ctl->page)) { 1835 ceph_readdir_cache_release(ctl); 1836 if (idx == 0) 1837 ctl->page = grab_cache_page(&dir->i_data, pgoff); 1838 else 1839 ctl->page = find_lock_page(&dir->i_data, pgoff); 1840 if (!ctl->page) { 1841 ctl->index = -1; 1842 return idx == 0 ? -ENOMEM : 0; 1843 } 1844 /* reading/filling the cache are serialized by 1845 * i_rwsem, no need to use page lock */ 1846 unlock_page(ctl->page); 1847 ctl->dentries = kmap(ctl->page); 1848 if (idx == 0) 1849 memset(ctl->dentries, 0, PAGE_SIZE); 1850 } 1851 1852 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) && 1853 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) { 1854 dout("readdir cache dn %p idx %d\n", dn, ctl->index); 1855 ctl->dentries[idx] = dn; 1856 ctl->index++; 1857 } else { 1858 dout("disable readdir cache\n"); 1859 ctl->index = -1; 1860 } 1861 return 0; 1862 } 1863 1864 int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1865 struct ceph_mds_session *session) 1866 { 1867 struct dentry *parent = req->r_dentry; 1868 struct inode *inode = d_inode(parent); 1869 struct ceph_inode_info *ci = ceph_inode(inode); 1870 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1871 struct qstr dname; 1872 struct dentry *dn; 1873 struct inode *in; 1874 int err = 0, skipped = 0, ret, i; 1875 u32 frag = le32_to_cpu(req->r_args.readdir.frag); 1876 u32 last_hash = 0; 1877 u32 fpos_offset; 1878 struct ceph_readdir_cache_control cache_ctl = {}; 1879 1880 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) 1881 return readdir_prepopulate_inodes_only(req, session); 1882 1883 if (rinfo->hash_order) { 1884 if (req->r_path2) { 1885 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, 1886 req->r_path2, 1887 strlen(req->r_path2)); 1888 last_hash = ceph_frag_value(last_hash); 1889 } else if (rinfo->offset_hash) { 1890 /* mds understands offset_hash */ 1891 WARN_ON_ONCE(req->r_readdir_offset != 2); 1892 last_hash = le32_to_cpu(req->r_args.readdir.offset_hash); 1893 } 1894 } 1895 1896 if (rinfo->dir_dir && 1897 le32_to_cpu(rinfo->dir_dir->frag) != frag) { 1898 dout("readdir_prepopulate got new frag %x -> %x\n", 1899 frag, le32_to_cpu(rinfo->dir_dir->frag)); 1900 frag = le32_to_cpu(rinfo->dir_dir->frag); 1901 if (!rinfo->hash_order) 1902 req->r_readdir_offset = 2; 1903 } 1904 1905 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { 1906 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", 1907 rinfo->dir_nr, parent); 1908 } else { 1909 dout("readdir_prepopulate %d items under dn %p\n", 1910 rinfo->dir_nr, parent); 1911 if (rinfo->dir_dir) 1912 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir); 1913 1914 if (ceph_frag_is_leftmost(frag) && 1915 req->r_readdir_offset == 2 && 1916 !(rinfo->hash_order && last_hash)) { 1917 /* note dir version at start of readdir so we can 1918 * tell if any dentries get dropped */ 1919 req->r_dir_release_cnt = 1920 atomic64_read(&ci->i_release_count); 1921 req->r_dir_ordered_cnt = 1922 atomic64_read(&ci->i_ordered_count); 1923 req->r_readdir_cache_idx = 0; 1924 } 1925 } 1926 1927 cache_ctl.index = req->r_readdir_cache_idx; 1928 fpos_offset = req->r_readdir_offset; 1929 1930 /* FIXME: release caps/leases if error occurs */ 1931 for (i = 0; i < rinfo->dir_nr; i++) { 1932 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1933 struct ceph_vino tvino; 1934 1935 dname.name = rde->name; 1936 dname.len = rde->name_len; 1937 dname.hash = full_name_hash(parent, dname.name, dname.len); 1938 1939 tvino.ino = le64_to_cpu(rde->inode.in->ino); 1940 tvino.snap = le64_to_cpu(rde->inode.in->snapid); 1941 1942 if (rinfo->hash_order) { 1943 u32 hash = ceph_frag_value(rde->raw_hash); 1944 if (hash != last_hash) 1945 fpos_offset = 2; 1946 last_hash = hash; 1947 rde->offset = ceph_make_fpos(hash, fpos_offset++, true); 1948 } else { 1949 rde->offset = ceph_make_fpos(frag, fpos_offset++, false); 1950 } 1951 1952 retry_lookup: 1953 dn = d_lookup(parent, &dname); 1954 dout("d_lookup on parent=%p name=%.*s got %p\n", 1955 parent, dname.len, dname.name, dn); 1956 1957 if (!dn) { 1958 dn = d_alloc(parent, &dname); 1959 dout("d_alloc %p '%.*s' = %p\n", parent, 1960 dname.len, dname.name, dn); 1961 if (!dn) { 1962 dout("d_alloc badness\n"); 1963 err = -ENOMEM; 1964 goto out; 1965 } 1966 if (rde->is_nokey) { 1967 spin_lock(&dn->d_lock); 1968 dn->d_flags |= DCACHE_NOKEY_NAME; 1969 spin_unlock(&dn->d_lock); 1970 } 1971 } else if (d_really_is_positive(dn) && 1972 (ceph_ino(d_inode(dn)) != tvino.ino || 1973 ceph_snap(d_inode(dn)) != tvino.snap)) { 1974 struct ceph_dentry_info *di = ceph_dentry(dn); 1975 dout(" dn %p points to wrong inode %p\n", 1976 dn, d_inode(dn)); 1977 1978 spin_lock(&dn->d_lock); 1979 if (di->offset > 0 && 1980 di->lease_shared_gen == 1981 atomic_read(&ci->i_shared_gen)) { 1982 __ceph_dir_clear_ordered(ci); 1983 di->offset = 0; 1984 } 1985 spin_unlock(&dn->d_lock); 1986 1987 d_delete(dn); 1988 dput(dn); 1989 goto retry_lookup; 1990 } 1991 1992 /* inode */ 1993 if (d_really_is_positive(dn)) { 1994 in = d_inode(dn); 1995 } else { 1996 in = ceph_get_inode(parent->d_sb, tvino, NULL); 1997 if (IS_ERR(in)) { 1998 dout("new_inode badness\n"); 1999 d_drop(dn); 2000 dput(dn); 2001 err = PTR_ERR(in); 2002 goto out; 2003 } 2004 } 2005 2006 ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 2007 -1, &req->r_caps_reservation); 2008 if (ret < 0) { 2009 pr_err("ceph_fill_inode badness on %p\n", in); 2010 if (d_really_is_negative(dn)) { 2011 if (in->i_state & I_NEW) { 2012 ihold(in); 2013 discard_new_inode(in); 2014 } 2015 iput(in); 2016 } 2017 d_drop(dn); 2018 err = ret; 2019 goto next_item; 2020 } 2021 if (in->i_state & I_NEW) 2022 unlock_new_inode(in); 2023 2024 if (d_really_is_negative(dn)) { 2025 if (ceph_security_xattr_deadlock(in)) { 2026 dout(" skip splicing dn %p to inode %p" 2027 " (security xattr deadlock)\n", dn, in); 2028 iput(in); 2029 skipped++; 2030 goto next_item; 2031 } 2032 2033 err = splice_dentry(&dn, in); 2034 if (err < 0) 2035 goto next_item; 2036 } 2037 2038 ceph_dentry(dn)->offset = rde->offset; 2039 2040 update_dentry_lease(d_inode(parent), dn, 2041 rde->lease, req->r_session, 2042 req->r_request_started); 2043 2044 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) { 2045 ret = fill_readdir_cache(d_inode(parent), dn, 2046 &cache_ctl, req); 2047 if (ret < 0) 2048 err = ret; 2049 } 2050 next_item: 2051 dput(dn); 2052 } 2053 out: 2054 if (err == 0 && skipped == 0) { 2055 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags); 2056 req->r_readdir_cache_idx = cache_ctl.index; 2057 } 2058 ceph_readdir_cache_release(&cache_ctl); 2059 dout("readdir_prepopulate done\n"); 2060 return err; 2061 } 2062 2063 bool ceph_inode_set_size(struct inode *inode, loff_t size) 2064 { 2065 struct ceph_inode_info *ci = ceph_inode(inode); 2066 bool ret; 2067 2068 spin_lock(&ci->i_ceph_lock); 2069 dout("set_size %p %llu -> %llu\n", inode, i_size_read(inode), size); 2070 i_size_write(inode, size); 2071 ceph_fscache_update(inode); 2072 inode->i_blocks = calc_inode_blocks(size); 2073 2074 ret = __ceph_should_report_size(ci); 2075 2076 spin_unlock(&ci->i_ceph_lock); 2077 2078 return ret; 2079 } 2080 2081 void ceph_queue_inode_work(struct inode *inode, int work_bit) 2082 { 2083 struct ceph_fs_client *fsc = ceph_inode_to_client(inode); 2084 struct ceph_inode_info *ci = ceph_inode(inode); 2085 set_bit(work_bit, &ci->i_work_mask); 2086 2087 ihold(inode); 2088 if (queue_work(fsc->inode_wq, &ci->i_work)) { 2089 dout("queue_inode_work %p, mask=%lx\n", inode, ci->i_work_mask); 2090 } else { 2091 dout("queue_inode_work %p already queued, mask=%lx\n", 2092 inode, ci->i_work_mask); 2093 iput(inode); 2094 } 2095 } 2096 2097 static void ceph_do_invalidate_pages(struct inode *inode) 2098 { 2099 struct ceph_inode_info *ci = ceph_inode(inode); 2100 u32 orig_gen; 2101 int check = 0; 2102 2103 ceph_fscache_invalidate(inode, false); 2104 2105 mutex_lock(&ci->i_truncate_mutex); 2106 2107 if (ceph_inode_is_shutdown(inode)) { 2108 pr_warn_ratelimited("%s: inode %llx.%llx is shut down\n", 2109 __func__, ceph_vinop(inode)); 2110 mapping_set_error(inode->i_mapping, -EIO); 2111 truncate_pagecache(inode, 0); 2112 mutex_unlock(&ci->i_truncate_mutex); 2113 goto out; 2114 } 2115 2116 spin_lock(&ci->i_ceph_lock); 2117 dout("invalidate_pages %p gen %d revoking %d\n", inode, 2118 ci->i_rdcache_gen, ci->i_rdcache_revoking); 2119 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { 2120 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2121 check = 1; 2122 spin_unlock(&ci->i_ceph_lock); 2123 mutex_unlock(&ci->i_truncate_mutex); 2124 goto out; 2125 } 2126 orig_gen = ci->i_rdcache_gen; 2127 spin_unlock(&ci->i_ceph_lock); 2128 2129 if (invalidate_inode_pages2(inode->i_mapping) < 0) { 2130 pr_err("invalidate_inode_pages2 %llx.%llx failed\n", 2131 ceph_vinop(inode)); 2132 } 2133 2134 spin_lock(&ci->i_ceph_lock); 2135 if (orig_gen == ci->i_rdcache_gen && 2136 orig_gen == ci->i_rdcache_revoking) { 2137 dout("invalidate_pages %p gen %d successful\n", inode, 2138 ci->i_rdcache_gen); 2139 ci->i_rdcache_revoking--; 2140 check = 1; 2141 } else { 2142 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", 2143 inode, orig_gen, ci->i_rdcache_gen, 2144 ci->i_rdcache_revoking); 2145 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2146 check = 1; 2147 } 2148 spin_unlock(&ci->i_ceph_lock); 2149 mutex_unlock(&ci->i_truncate_mutex); 2150 out: 2151 if (check) 2152 ceph_check_caps(ci, 0); 2153 } 2154 2155 /* 2156 * Make sure any pending truncation is applied before doing anything 2157 * that may depend on it. 2158 */ 2159 void __ceph_do_pending_vmtruncate(struct inode *inode) 2160 { 2161 struct ceph_inode_info *ci = ceph_inode(inode); 2162 u64 to; 2163 int wrbuffer_refs, finish = 0; 2164 2165 mutex_lock(&ci->i_truncate_mutex); 2166 retry: 2167 spin_lock(&ci->i_ceph_lock); 2168 if (ci->i_truncate_pending == 0) { 2169 dout("%s %p none pending\n", __func__, inode); 2170 spin_unlock(&ci->i_ceph_lock); 2171 mutex_unlock(&ci->i_truncate_mutex); 2172 return; 2173 } 2174 2175 /* 2176 * make sure any dirty snapped pages are flushed before we 2177 * possibly truncate them.. so write AND block! 2178 */ 2179 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { 2180 spin_unlock(&ci->i_ceph_lock); 2181 dout("%s %p flushing snaps first\n", __func__, inode); 2182 filemap_write_and_wait_range(&inode->i_data, 0, 2183 inode->i_sb->s_maxbytes); 2184 goto retry; 2185 } 2186 2187 /* there should be no reader or writer */ 2188 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); 2189 2190 to = ci->i_truncate_pagecache_size; 2191 wrbuffer_refs = ci->i_wrbuffer_ref; 2192 dout("%s %p (%d) to %lld\n", __func__, inode, 2193 ci->i_truncate_pending, to); 2194 spin_unlock(&ci->i_ceph_lock); 2195 2196 ceph_fscache_resize(inode, to); 2197 truncate_pagecache(inode, to); 2198 2199 spin_lock(&ci->i_ceph_lock); 2200 if (to == ci->i_truncate_pagecache_size) { 2201 ci->i_truncate_pending = 0; 2202 finish = 1; 2203 } 2204 spin_unlock(&ci->i_ceph_lock); 2205 if (!finish) 2206 goto retry; 2207 2208 mutex_unlock(&ci->i_truncate_mutex); 2209 2210 if (wrbuffer_refs == 0) 2211 ceph_check_caps(ci, 0); 2212 2213 wake_up_all(&ci->i_cap_wq); 2214 } 2215 2216 static void ceph_inode_work(struct work_struct *work) 2217 { 2218 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 2219 i_work); 2220 struct inode *inode = &ci->netfs.inode; 2221 2222 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) { 2223 dout("writeback %p\n", inode); 2224 filemap_fdatawrite(&inode->i_data); 2225 } 2226 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask)) 2227 ceph_do_invalidate_pages(inode); 2228 2229 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask)) 2230 __ceph_do_pending_vmtruncate(inode); 2231 2232 if (test_and_clear_bit(CEPH_I_WORK_CHECK_CAPS, &ci->i_work_mask)) 2233 ceph_check_caps(ci, 0); 2234 2235 if (test_and_clear_bit(CEPH_I_WORK_FLUSH_SNAPS, &ci->i_work_mask)) 2236 ceph_flush_snaps(ci, NULL); 2237 2238 iput(inode); 2239 } 2240 2241 static const char *ceph_encrypted_get_link(struct dentry *dentry, 2242 struct inode *inode, 2243 struct delayed_call *done) 2244 { 2245 struct ceph_inode_info *ci = ceph_inode(inode); 2246 2247 if (!dentry) 2248 return ERR_PTR(-ECHILD); 2249 2250 return fscrypt_get_symlink(inode, ci->i_symlink, i_size_read(inode), 2251 done); 2252 } 2253 2254 static int ceph_encrypted_symlink_getattr(struct mnt_idmap *idmap, 2255 const struct path *path, 2256 struct kstat *stat, u32 request_mask, 2257 unsigned int query_flags) 2258 { 2259 int ret; 2260 2261 ret = ceph_getattr(idmap, path, stat, request_mask, query_flags); 2262 if (ret) 2263 return ret; 2264 return fscrypt_symlink_getattr(path, stat); 2265 } 2266 2267 /* 2268 * symlinks 2269 */ 2270 static const struct inode_operations ceph_symlink_iops = { 2271 .get_link = simple_get_link, 2272 .setattr = ceph_setattr, 2273 .getattr = ceph_getattr, 2274 .listxattr = ceph_listxattr, 2275 }; 2276 2277 static const struct inode_operations ceph_encrypted_symlink_iops = { 2278 .get_link = ceph_encrypted_get_link, 2279 .setattr = ceph_setattr, 2280 .getattr = ceph_encrypted_symlink_getattr, 2281 .listxattr = ceph_listxattr, 2282 }; 2283 2284 /* 2285 * Transfer the encrypted last block to the MDS and the MDS 2286 * will help update it when truncating a smaller size. 2287 * 2288 * We don't support a PAGE_SIZE that is smaller than the 2289 * CEPH_FSCRYPT_BLOCK_SIZE. 2290 */ 2291 static int fill_fscrypt_truncate(struct inode *inode, 2292 struct ceph_mds_request *req, 2293 struct iattr *attr) 2294 { 2295 struct ceph_inode_info *ci = ceph_inode(inode); 2296 int boff = attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE; 2297 loff_t pos, orig_pos = round_down(attr->ia_size, 2298 CEPH_FSCRYPT_BLOCK_SIZE); 2299 u64 block = orig_pos >> CEPH_FSCRYPT_BLOCK_SHIFT; 2300 struct ceph_pagelist *pagelist = NULL; 2301 struct kvec iov = {0}; 2302 struct iov_iter iter; 2303 struct page *page = NULL; 2304 struct ceph_fscrypt_truncate_size_header header; 2305 int retry_op = 0; 2306 int len = CEPH_FSCRYPT_BLOCK_SIZE; 2307 loff_t i_size = i_size_read(inode); 2308 int got, ret, issued; 2309 u64 objver; 2310 2311 ret = __ceph_get_caps(inode, NULL, CEPH_CAP_FILE_RD, 0, -1, &got); 2312 if (ret < 0) 2313 return ret; 2314 2315 issued = __ceph_caps_issued(ci, NULL); 2316 2317 dout("%s size %lld -> %lld got cap refs on %s, issued %s\n", __func__, 2318 i_size, attr->ia_size, ceph_cap_string(got), 2319 ceph_cap_string(issued)); 2320 2321 /* Try to writeback the dirty pagecaches */ 2322 if (issued & (CEPH_CAP_FILE_BUFFER)) { 2323 loff_t lend = orig_pos + CEPH_FSCRYPT_BLOCK_SHIFT - 1; 2324 2325 ret = filemap_write_and_wait_range(inode->i_mapping, 2326 orig_pos, lend); 2327 if (ret < 0) 2328 goto out; 2329 } 2330 2331 page = __page_cache_alloc(GFP_KERNEL); 2332 if (page == NULL) { 2333 ret = -ENOMEM; 2334 goto out; 2335 } 2336 2337 pagelist = ceph_pagelist_alloc(GFP_KERNEL); 2338 if (!pagelist) { 2339 ret = -ENOMEM; 2340 goto out; 2341 } 2342 2343 iov.iov_base = kmap_local_page(page); 2344 iov.iov_len = len; 2345 iov_iter_kvec(&iter, READ, &iov, 1, len); 2346 2347 pos = orig_pos; 2348 ret = __ceph_sync_read(inode, &pos, &iter, &retry_op, &objver); 2349 if (ret < 0) 2350 goto out; 2351 2352 /* Insert the header first */ 2353 header.ver = 1; 2354 header.compat = 1; 2355 header.change_attr = cpu_to_le64(inode_peek_iversion_raw(inode)); 2356 2357 /* 2358 * Always set the block_size to CEPH_FSCRYPT_BLOCK_SIZE, 2359 * because in MDS it may need this to do the truncate. 2360 */ 2361 header.block_size = cpu_to_le32(CEPH_FSCRYPT_BLOCK_SIZE); 2362 2363 /* 2364 * If we hit a hole here, we should just skip filling 2365 * the fscrypt for the request, because once the fscrypt 2366 * is enabled, the file will be split into many blocks 2367 * with the size of CEPH_FSCRYPT_BLOCK_SIZE, if there 2368 * has a hole, the hole size should be multiple of block 2369 * size. 2370 * 2371 * If the Rados object doesn't exist, it will be set to 0. 2372 */ 2373 if (!objver) { 2374 dout("%s hit hole, ppos %lld < size %lld\n", __func__, 2375 pos, i_size); 2376 2377 header.data_len = cpu_to_le32(8 + 8 + 4); 2378 header.file_offset = 0; 2379 ret = 0; 2380 } else { 2381 header.data_len = cpu_to_le32(8 + 8 + 4 + CEPH_FSCRYPT_BLOCK_SIZE); 2382 header.file_offset = cpu_to_le64(orig_pos); 2383 2384 dout("%s encrypt block boff/bsize %d/%lu\n", __func__, 2385 boff, CEPH_FSCRYPT_BLOCK_SIZE); 2386 2387 /* truncate and zero out the extra contents for the last block */ 2388 memset(iov.iov_base + boff, 0, PAGE_SIZE - boff); 2389 2390 /* encrypt the last block */ 2391 ret = ceph_fscrypt_encrypt_block_inplace(inode, page, 2392 CEPH_FSCRYPT_BLOCK_SIZE, 2393 0, block, 2394 GFP_KERNEL); 2395 if (ret) 2396 goto out; 2397 } 2398 2399 /* Insert the header */ 2400 ret = ceph_pagelist_append(pagelist, &header, sizeof(header)); 2401 if (ret) 2402 goto out; 2403 2404 if (header.block_size) { 2405 /* Append the last block contents to pagelist */ 2406 ret = ceph_pagelist_append(pagelist, iov.iov_base, 2407 CEPH_FSCRYPT_BLOCK_SIZE); 2408 if (ret) 2409 goto out; 2410 } 2411 req->r_pagelist = pagelist; 2412 out: 2413 dout("%s %p size dropping cap refs on %s\n", __func__, 2414 inode, ceph_cap_string(got)); 2415 ceph_put_cap_refs(ci, got); 2416 if (iov.iov_base) 2417 kunmap_local(iov.iov_base); 2418 if (page) 2419 __free_pages(page, 0); 2420 if (ret && pagelist) 2421 ceph_pagelist_release(pagelist); 2422 return ret; 2423 } 2424 2425 int __ceph_setattr(struct inode *inode, struct iattr *attr, 2426 struct ceph_iattr *cia) 2427 { 2428 struct ceph_inode_info *ci = ceph_inode(inode); 2429 unsigned int ia_valid = attr->ia_valid; 2430 struct ceph_mds_request *req; 2431 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; 2432 struct ceph_cap_flush *prealloc_cf; 2433 loff_t isize = i_size_read(inode); 2434 int issued; 2435 int release = 0, dirtied = 0; 2436 int mask = 0; 2437 int err = 0; 2438 int inode_dirty_flags = 0; 2439 bool lock_snap_rwsem = false; 2440 bool fill_fscrypt; 2441 int truncate_retry = 20; /* The RMW will take around 50ms */ 2442 2443 retry: 2444 prealloc_cf = ceph_alloc_cap_flush(); 2445 if (!prealloc_cf) 2446 return -ENOMEM; 2447 2448 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, 2449 USE_AUTH_MDS); 2450 if (IS_ERR(req)) { 2451 ceph_free_cap_flush(prealloc_cf); 2452 return PTR_ERR(req); 2453 } 2454 2455 fill_fscrypt = false; 2456 spin_lock(&ci->i_ceph_lock); 2457 issued = __ceph_caps_issued(ci, NULL); 2458 2459 if (!ci->i_head_snapc && 2460 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) { 2461 lock_snap_rwsem = true; 2462 if (!down_read_trylock(&mdsc->snap_rwsem)) { 2463 spin_unlock(&ci->i_ceph_lock); 2464 down_read(&mdsc->snap_rwsem); 2465 spin_lock(&ci->i_ceph_lock); 2466 issued = __ceph_caps_issued(ci, NULL); 2467 } 2468 } 2469 2470 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); 2471 #if IS_ENABLED(CONFIG_FS_ENCRYPTION) 2472 if (cia && cia->fscrypt_auth) { 2473 u32 len = ceph_fscrypt_auth_len(cia->fscrypt_auth); 2474 2475 if (len > sizeof(*cia->fscrypt_auth)) { 2476 err = -EINVAL; 2477 spin_unlock(&ci->i_ceph_lock); 2478 goto out; 2479 } 2480 2481 dout("setattr %llx:%llx fscrypt_auth len %u to %u)\n", 2482 ceph_vinop(inode), ci->fscrypt_auth_len, len); 2483 2484 /* It should never be re-set once set */ 2485 WARN_ON_ONCE(ci->fscrypt_auth); 2486 2487 if (issued & CEPH_CAP_AUTH_EXCL) { 2488 dirtied |= CEPH_CAP_AUTH_EXCL; 2489 kfree(ci->fscrypt_auth); 2490 ci->fscrypt_auth = (u8 *)cia->fscrypt_auth; 2491 ci->fscrypt_auth_len = len; 2492 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2493 ci->fscrypt_auth_len != len || 2494 memcmp(ci->fscrypt_auth, cia->fscrypt_auth, len)) { 2495 req->r_fscrypt_auth = cia->fscrypt_auth; 2496 mask |= CEPH_SETATTR_FSCRYPT_AUTH; 2497 release |= CEPH_CAP_AUTH_SHARED; 2498 } 2499 cia->fscrypt_auth = NULL; 2500 } 2501 #else 2502 if (cia && cia->fscrypt_auth) { 2503 err = -EINVAL; 2504 spin_unlock(&ci->i_ceph_lock); 2505 goto out; 2506 } 2507 #endif /* CONFIG_FS_ENCRYPTION */ 2508 2509 if (ia_valid & ATTR_UID) { 2510 dout("setattr %p uid %d -> %d\n", inode, 2511 from_kuid(&init_user_ns, inode->i_uid), 2512 from_kuid(&init_user_ns, attr->ia_uid)); 2513 if (issued & CEPH_CAP_AUTH_EXCL) { 2514 inode->i_uid = attr->ia_uid; 2515 dirtied |= CEPH_CAP_AUTH_EXCL; 2516 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2517 !uid_eq(attr->ia_uid, inode->i_uid)) { 2518 req->r_args.setattr.uid = cpu_to_le32( 2519 from_kuid(&init_user_ns, attr->ia_uid)); 2520 mask |= CEPH_SETATTR_UID; 2521 release |= CEPH_CAP_AUTH_SHARED; 2522 } 2523 } 2524 if (ia_valid & ATTR_GID) { 2525 dout("setattr %p gid %d -> %d\n", inode, 2526 from_kgid(&init_user_ns, inode->i_gid), 2527 from_kgid(&init_user_ns, attr->ia_gid)); 2528 if (issued & CEPH_CAP_AUTH_EXCL) { 2529 inode->i_gid = attr->ia_gid; 2530 dirtied |= CEPH_CAP_AUTH_EXCL; 2531 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2532 !gid_eq(attr->ia_gid, inode->i_gid)) { 2533 req->r_args.setattr.gid = cpu_to_le32( 2534 from_kgid(&init_user_ns, attr->ia_gid)); 2535 mask |= CEPH_SETATTR_GID; 2536 release |= CEPH_CAP_AUTH_SHARED; 2537 } 2538 } 2539 if (ia_valid & ATTR_MODE) { 2540 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, 2541 attr->ia_mode); 2542 if (issued & CEPH_CAP_AUTH_EXCL) { 2543 inode->i_mode = attr->ia_mode; 2544 dirtied |= CEPH_CAP_AUTH_EXCL; 2545 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2546 attr->ia_mode != inode->i_mode) { 2547 inode->i_mode = attr->ia_mode; 2548 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); 2549 mask |= CEPH_SETATTR_MODE; 2550 release |= CEPH_CAP_AUTH_SHARED; 2551 } 2552 } 2553 2554 if (ia_valid & ATTR_ATIME) { 2555 dout("setattr %p atime %lld.%ld -> %lld.%ld\n", inode, 2556 inode->i_atime.tv_sec, inode->i_atime.tv_nsec, 2557 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); 2558 if (issued & CEPH_CAP_FILE_EXCL) { 2559 ci->i_time_warp_seq++; 2560 inode->i_atime = attr->ia_atime; 2561 dirtied |= CEPH_CAP_FILE_EXCL; 2562 } else if ((issued & CEPH_CAP_FILE_WR) && 2563 timespec64_compare(&inode->i_atime, 2564 &attr->ia_atime) < 0) { 2565 inode->i_atime = attr->ia_atime; 2566 dirtied |= CEPH_CAP_FILE_WR; 2567 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2568 !timespec64_equal(&inode->i_atime, &attr->ia_atime)) { 2569 ceph_encode_timespec64(&req->r_args.setattr.atime, 2570 &attr->ia_atime); 2571 mask |= CEPH_SETATTR_ATIME; 2572 release |= CEPH_CAP_FILE_SHARED | 2573 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2574 } 2575 } 2576 if (ia_valid & ATTR_SIZE) { 2577 dout("setattr %p size %lld -> %lld\n", inode, isize, attr->ia_size); 2578 /* 2579 * Only when the new size is smaller and not aligned to 2580 * CEPH_FSCRYPT_BLOCK_SIZE will the RMW is needed. 2581 */ 2582 if (IS_ENCRYPTED(inode) && attr->ia_size < isize && 2583 (attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE)) { 2584 mask |= CEPH_SETATTR_SIZE; 2585 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2586 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2587 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2588 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2589 req->r_args.setattr.size = 2590 cpu_to_le64(round_up(attr->ia_size, 2591 CEPH_FSCRYPT_BLOCK_SIZE)); 2592 req->r_args.setattr.old_size = 2593 cpu_to_le64(round_up(isize, 2594 CEPH_FSCRYPT_BLOCK_SIZE)); 2595 req->r_fscrypt_file = attr->ia_size; 2596 fill_fscrypt = true; 2597 } else if ((issued & CEPH_CAP_FILE_EXCL) && attr->ia_size >= isize) { 2598 if (attr->ia_size > isize) { 2599 i_size_write(inode, attr->ia_size); 2600 inode->i_blocks = calc_inode_blocks(attr->ia_size); 2601 ci->i_reported_size = attr->ia_size; 2602 dirtied |= CEPH_CAP_FILE_EXCL; 2603 ia_valid |= ATTR_MTIME; 2604 } 2605 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2606 attr->ia_size != isize) { 2607 mask |= CEPH_SETATTR_SIZE; 2608 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2609 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2610 if (IS_ENCRYPTED(inode) && attr->ia_size) { 2611 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2612 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2613 req->r_args.setattr.size = 2614 cpu_to_le64(round_up(attr->ia_size, 2615 CEPH_FSCRYPT_BLOCK_SIZE)); 2616 req->r_args.setattr.old_size = 2617 cpu_to_le64(round_up(isize, 2618 CEPH_FSCRYPT_BLOCK_SIZE)); 2619 req->r_fscrypt_file = attr->ia_size; 2620 } else { 2621 req->r_args.setattr.size = cpu_to_le64(attr->ia_size); 2622 req->r_args.setattr.old_size = cpu_to_le64(isize); 2623 req->r_fscrypt_file = 0; 2624 } 2625 } 2626 } 2627 if (ia_valid & ATTR_MTIME) { 2628 dout("setattr %p mtime %lld.%ld -> %lld.%ld\n", inode, 2629 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, 2630 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); 2631 if (issued & CEPH_CAP_FILE_EXCL) { 2632 ci->i_time_warp_seq++; 2633 inode->i_mtime = attr->ia_mtime; 2634 dirtied |= CEPH_CAP_FILE_EXCL; 2635 } else if ((issued & CEPH_CAP_FILE_WR) && 2636 timespec64_compare(&inode->i_mtime, 2637 &attr->ia_mtime) < 0) { 2638 inode->i_mtime = attr->ia_mtime; 2639 dirtied |= CEPH_CAP_FILE_WR; 2640 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2641 !timespec64_equal(&inode->i_mtime, &attr->ia_mtime)) { 2642 ceph_encode_timespec64(&req->r_args.setattr.mtime, 2643 &attr->ia_mtime); 2644 mask |= CEPH_SETATTR_MTIME; 2645 release |= CEPH_CAP_FILE_SHARED | 2646 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2647 } 2648 } 2649 2650 /* these do nothing */ 2651 if (ia_valid & ATTR_CTIME) { 2652 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| 2653 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; 2654 dout("setattr %p ctime %lld.%ld -> %lld.%ld (%s)\n", inode, 2655 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, 2656 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, 2657 only ? "ctime only" : "ignored"); 2658 if (only) { 2659 /* 2660 * if kernel wants to dirty ctime but nothing else, 2661 * we need to choose a cap to dirty under, or do 2662 * a almost-no-op setattr 2663 */ 2664 if (issued & CEPH_CAP_AUTH_EXCL) 2665 dirtied |= CEPH_CAP_AUTH_EXCL; 2666 else if (issued & CEPH_CAP_FILE_EXCL) 2667 dirtied |= CEPH_CAP_FILE_EXCL; 2668 else if (issued & CEPH_CAP_XATTR_EXCL) 2669 dirtied |= CEPH_CAP_XATTR_EXCL; 2670 else 2671 mask |= CEPH_SETATTR_CTIME; 2672 } 2673 } 2674 if (ia_valid & ATTR_FILE) 2675 dout("setattr %p ATTR_FILE ... hrm!\n", inode); 2676 2677 if (dirtied) { 2678 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied, 2679 &prealloc_cf); 2680 inode->i_ctime = attr->ia_ctime; 2681 inode_inc_iversion_raw(inode); 2682 } 2683 2684 release &= issued; 2685 spin_unlock(&ci->i_ceph_lock); 2686 if (lock_snap_rwsem) { 2687 up_read(&mdsc->snap_rwsem); 2688 lock_snap_rwsem = false; 2689 } 2690 2691 if (inode_dirty_flags) 2692 __mark_inode_dirty(inode, inode_dirty_flags); 2693 2694 if (mask) { 2695 req->r_inode = inode; 2696 ihold(inode); 2697 req->r_inode_drop = release; 2698 req->r_args.setattr.mask = cpu_to_le32(mask); 2699 req->r_num_caps = 1; 2700 req->r_stamp = attr->ia_ctime; 2701 if (fill_fscrypt) { 2702 err = fill_fscrypt_truncate(inode, req, attr); 2703 if (err) 2704 goto out; 2705 } 2706 2707 /* 2708 * The truncate request will return -EAGAIN when the 2709 * last block has been updated just before the MDS 2710 * successfully gets the xlock for the FILE lock. To 2711 * avoid corrupting the file contents we need to retry 2712 * it. 2713 */ 2714 err = ceph_mdsc_do_request(mdsc, NULL, req); 2715 if (err == -EAGAIN && truncate_retry--) { 2716 dout("setattr %p result=%d (%s locally, %d remote), retry it!\n", 2717 inode, err, ceph_cap_string(dirtied), mask); 2718 ceph_mdsc_put_request(req); 2719 ceph_free_cap_flush(prealloc_cf); 2720 goto retry; 2721 } 2722 } 2723 out: 2724 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, 2725 ceph_cap_string(dirtied), mask); 2726 2727 ceph_mdsc_put_request(req); 2728 ceph_free_cap_flush(prealloc_cf); 2729 2730 if (err >= 0 && (mask & CEPH_SETATTR_SIZE)) 2731 __ceph_do_pending_vmtruncate(inode); 2732 2733 return err; 2734 } 2735 2736 /* 2737 * setattr 2738 */ 2739 int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 2740 struct iattr *attr) 2741 { 2742 struct inode *inode = d_inode(dentry); 2743 struct ceph_fs_client *fsc = ceph_inode_to_client(inode); 2744 int err; 2745 2746 if (ceph_snap(inode) != CEPH_NOSNAP) 2747 return -EROFS; 2748 2749 if (ceph_inode_is_shutdown(inode)) 2750 return -ESTALE; 2751 2752 err = fscrypt_prepare_setattr(dentry, attr); 2753 if (err) 2754 return err; 2755 2756 err = setattr_prepare(&nop_mnt_idmap, dentry, attr); 2757 if (err != 0) 2758 return err; 2759 2760 if ((attr->ia_valid & ATTR_SIZE) && 2761 attr->ia_size > max(i_size_read(inode), fsc->max_file_size)) 2762 return -EFBIG; 2763 2764 if ((attr->ia_valid & ATTR_SIZE) && 2765 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) 2766 return -EDQUOT; 2767 2768 err = __ceph_setattr(inode, attr, NULL); 2769 2770 if (err >= 0 && (attr->ia_valid & ATTR_MODE)) 2771 err = posix_acl_chmod(&nop_mnt_idmap, dentry, attr->ia_mode); 2772 2773 return err; 2774 } 2775 2776 int ceph_try_to_choose_auth_mds(struct inode *inode, int mask) 2777 { 2778 int issued = ceph_caps_issued(ceph_inode(inode)); 2779 2780 /* 2781 * If any 'x' caps is issued we can just choose the auth MDS 2782 * instead of the random replica MDSes. Because only when the 2783 * Locker is in LOCK_EXEC state will the loner client could 2784 * get the 'x' caps. And if we send the getattr requests to 2785 * any replica MDS it must auth pin and tries to rdlock from 2786 * the auth MDS, and then the auth MDS need to do the Locker 2787 * state transition to LOCK_SYNC. And after that the lock state 2788 * will change back. 2789 * 2790 * This cost much when doing the Locker state transition and 2791 * usually will need to revoke caps from clients. 2792 * 2793 * And for the 'Xs' caps for getxattr we will also choose the 2794 * auth MDS, because the MDS side code is buggy due to setxattr 2795 * won't notify the replica MDSes when the values changed and 2796 * the replica MDS will return the old values. Though we will 2797 * fix it in MDS code, but this still makes sense for old ceph. 2798 */ 2799 if (((mask & CEPH_CAP_ANY_SHARED) && (issued & CEPH_CAP_ANY_EXCL)) 2800 || (mask & (CEPH_STAT_RSTAT | CEPH_STAT_CAP_XATTR))) 2801 return USE_AUTH_MDS; 2802 else 2803 return USE_ANY_MDS; 2804 } 2805 2806 /* 2807 * Verify that we have a lease on the given mask. If not, 2808 * do a getattr against an mds. 2809 */ 2810 int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 2811 int mask, bool force) 2812 { 2813 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); 2814 struct ceph_mds_client *mdsc = fsc->mdsc; 2815 struct ceph_mds_request *req; 2816 int mode; 2817 int err; 2818 2819 if (ceph_snap(inode) == CEPH_SNAPDIR) { 2820 dout("do_getattr inode %p SNAPDIR\n", inode); 2821 return 0; 2822 } 2823 2824 dout("do_getattr inode %p mask %s mode 0%o\n", 2825 inode, ceph_cap_string(mask), inode->i_mode); 2826 if (!force && ceph_caps_issued_mask_metric(ceph_inode(inode), mask, 1)) 2827 return 0; 2828 2829 mode = ceph_try_to_choose_auth_mds(inode, mask); 2830 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode); 2831 if (IS_ERR(req)) 2832 return PTR_ERR(req); 2833 req->r_inode = inode; 2834 ihold(inode); 2835 req->r_num_caps = 1; 2836 req->r_args.getattr.mask = cpu_to_le32(mask); 2837 req->r_locked_page = locked_page; 2838 err = ceph_mdsc_do_request(mdsc, NULL, req); 2839 if (locked_page && err == 0) { 2840 u64 inline_version = req->r_reply_info.targeti.inline_version; 2841 if (inline_version == 0) { 2842 /* the reply is supposed to contain inline data */ 2843 err = -EINVAL; 2844 } else if (inline_version == CEPH_INLINE_NONE || 2845 inline_version == 1) { 2846 err = -ENODATA; 2847 } else { 2848 err = req->r_reply_info.targeti.inline_len; 2849 } 2850 } 2851 ceph_mdsc_put_request(req); 2852 dout("do_getattr result=%d\n", err); 2853 return err; 2854 } 2855 2856 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, 2857 size_t size) 2858 { 2859 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); 2860 struct ceph_mds_client *mdsc = fsc->mdsc; 2861 struct ceph_mds_request *req; 2862 int mode = USE_AUTH_MDS; 2863 int err; 2864 char *xattr_value; 2865 size_t xattr_value_len; 2866 2867 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETVXATTR, mode); 2868 if (IS_ERR(req)) { 2869 err = -ENOMEM; 2870 goto out; 2871 } 2872 2873 req->r_feature_needed = CEPHFS_FEATURE_OP_GETVXATTR; 2874 req->r_path2 = kstrdup(name, GFP_NOFS); 2875 if (!req->r_path2) { 2876 err = -ENOMEM; 2877 goto put; 2878 } 2879 2880 ihold(inode); 2881 req->r_inode = inode; 2882 err = ceph_mdsc_do_request(mdsc, NULL, req); 2883 if (err < 0) 2884 goto put; 2885 2886 xattr_value = req->r_reply_info.xattr_info.xattr_value; 2887 xattr_value_len = req->r_reply_info.xattr_info.xattr_value_len; 2888 2889 dout("do_getvxattr xattr_value_len:%zu, size:%zu\n", xattr_value_len, size); 2890 2891 err = (int)xattr_value_len; 2892 if (size == 0) 2893 goto put; 2894 2895 if (xattr_value_len > size) { 2896 err = -ERANGE; 2897 goto put; 2898 } 2899 2900 memcpy(value, xattr_value, xattr_value_len); 2901 put: 2902 ceph_mdsc_put_request(req); 2903 out: 2904 dout("do_getvxattr result=%d\n", err); 2905 return err; 2906 } 2907 2908 2909 /* 2910 * Check inode permissions. We verify we have a valid value for 2911 * the AUTH cap, then call the generic handler. 2912 */ 2913 int ceph_permission(struct mnt_idmap *idmap, struct inode *inode, 2914 int mask) 2915 { 2916 int err; 2917 2918 if (mask & MAY_NOT_BLOCK) 2919 return -ECHILD; 2920 2921 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); 2922 2923 if (!err) 2924 err = generic_permission(&nop_mnt_idmap, inode, mask); 2925 return err; 2926 } 2927 2928 /* Craft a mask of needed caps given a set of requested statx attrs. */ 2929 static int statx_to_caps(u32 want, umode_t mode) 2930 { 2931 int mask = 0; 2932 2933 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME|STATX_CHANGE_COOKIE)) 2934 mask |= CEPH_CAP_AUTH_SHARED; 2935 2936 if (want & (STATX_NLINK|STATX_CTIME|STATX_CHANGE_COOKIE)) { 2937 /* 2938 * The link count for directories depends on inode->i_subdirs, 2939 * and that is only updated when Fs caps are held. 2940 */ 2941 if (S_ISDIR(mode)) 2942 mask |= CEPH_CAP_FILE_SHARED; 2943 else 2944 mask |= CEPH_CAP_LINK_SHARED; 2945 } 2946 2947 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|STATX_BLOCKS|STATX_CHANGE_COOKIE)) 2948 mask |= CEPH_CAP_FILE_SHARED; 2949 2950 if (want & (STATX_CTIME|STATX_CHANGE_COOKIE)) 2951 mask |= CEPH_CAP_XATTR_SHARED; 2952 2953 return mask; 2954 } 2955 2956 /* 2957 * Get all the attributes. If we have sufficient caps for the requested attrs, 2958 * then we can avoid talking to the MDS at all. 2959 */ 2960 int ceph_getattr(struct mnt_idmap *idmap, const struct path *path, 2961 struct kstat *stat, u32 request_mask, unsigned int flags) 2962 { 2963 struct inode *inode = d_inode(path->dentry); 2964 struct super_block *sb = inode->i_sb; 2965 struct ceph_inode_info *ci = ceph_inode(inode); 2966 u32 valid_mask = STATX_BASIC_STATS; 2967 int err = 0; 2968 2969 if (ceph_inode_is_shutdown(inode)) 2970 return -ESTALE; 2971 2972 /* Skip the getattr altogether if we're asked not to sync */ 2973 if ((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) { 2974 err = ceph_do_getattr(inode, 2975 statx_to_caps(request_mask, inode->i_mode), 2976 flags & AT_STATX_FORCE_SYNC); 2977 if (err) 2978 return err; 2979 } 2980 2981 generic_fillattr(&nop_mnt_idmap, inode, stat); 2982 stat->ino = ceph_present_inode(inode); 2983 2984 /* 2985 * btime on newly-allocated inodes is 0, so if this is still set to 2986 * that, then assume that it's not valid. 2987 */ 2988 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) { 2989 stat->btime = ci->i_btime; 2990 valid_mask |= STATX_BTIME; 2991 } 2992 2993 if (request_mask & STATX_CHANGE_COOKIE) { 2994 stat->change_cookie = inode_peek_iversion_raw(inode); 2995 valid_mask |= STATX_CHANGE_COOKIE; 2996 } 2997 2998 if (ceph_snap(inode) == CEPH_NOSNAP) 2999 stat->dev = sb->s_dev; 3000 else 3001 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0; 3002 3003 if (S_ISDIR(inode->i_mode)) { 3004 if (ceph_test_mount_opt(ceph_sb_to_client(sb), RBYTES)) { 3005 stat->size = ci->i_rbytes; 3006 } else if (ceph_snap(inode) == CEPH_SNAPDIR) { 3007 struct ceph_inode_info *pci; 3008 struct ceph_snap_realm *realm; 3009 struct inode *parent; 3010 3011 parent = ceph_lookup_inode(sb, ceph_ino(inode)); 3012 if (IS_ERR(parent)) 3013 return PTR_ERR(parent); 3014 3015 pci = ceph_inode(parent); 3016 spin_lock(&pci->i_ceph_lock); 3017 realm = pci->i_snap_realm; 3018 if (realm) 3019 stat->size = realm->num_snaps; 3020 else 3021 stat->size = 0; 3022 spin_unlock(&pci->i_ceph_lock); 3023 iput(parent); 3024 } else { 3025 stat->size = ci->i_files + ci->i_subdirs; 3026 } 3027 stat->blocks = 0; 3028 stat->blksize = 65536; 3029 /* 3030 * Some applications rely on the number of st_nlink 3031 * value on directories to be either 0 (if unlinked) 3032 * or 2 + number of subdirectories. 3033 */ 3034 if (stat->nlink == 1) 3035 /* '.' + '..' + subdirs */ 3036 stat->nlink = 1 + 1 + ci->i_subdirs; 3037 } 3038 3039 stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC; 3040 if (IS_ENCRYPTED(inode)) 3041 stat->attributes |= STATX_ATTR_ENCRYPTED; 3042 stat->attributes_mask |= (STATX_ATTR_CHANGE_MONOTONIC | 3043 STATX_ATTR_ENCRYPTED); 3044 3045 stat->result_mask = request_mask & valid_mask; 3046 return err; 3047 } 3048 3049 void ceph_inode_shutdown(struct inode *inode) 3050 { 3051 struct ceph_inode_info *ci = ceph_inode(inode); 3052 struct rb_node *p; 3053 int iputs = 0; 3054 bool invalidate = false; 3055 3056 spin_lock(&ci->i_ceph_lock); 3057 ci->i_ceph_flags |= CEPH_I_SHUTDOWN; 3058 p = rb_first(&ci->i_caps); 3059 while (p) { 3060 struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); 3061 3062 p = rb_next(p); 3063 iputs += ceph_purge_inode_cap(inode, cap, &invalidate); 3064 } 3065 spin_unlock(&ci->i_ceph_lock); 3066 3067 if (invalidate) 3068 ceph_queue_invalidate(inode); 3069 while (iputs--) 3070 iput(inode); 3071 } 3072