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 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT; 82 83 if (!S_ISLNK(*mode)) { 84 err = ceph_pre_init_acls(dir, mode, as_ctx); 85 if (err < 0) 86 goto out_err; 87 } 88 89 inode->i_state = 0; 90 inode->i_mode = *mode; 91 92 err = ceph_security_init_secctx(dentry, *mode, as_ctx); 93 if (err < 0) 94 goto out_err; 95 96 /* 97 * We'll skip setting fscrypt context for snapshots, leaving that for 98 * the handle_reply(). 99 */ 100 if (ceph_snap(dir) != CEPH_SNAPDIR) { 101 err = ceph_fscrypt_prepare_context(dir, inode, as_ctx); 102 if (err) 103 goto out_err; 104 } 105 106 return inode; 107 out_err: 108 iput(inode); 109 return ERR_PTR(err); 110 } 111 112 void ceph_as_ctx_to_req(struct ceph_mds_request *req, 113 struct ceph_acl_sec_ctx *as_ctx) 114 { 115 if (as_ctx->pagelist) { 116 req->r_pagelist = as_ctx->pagelist; 117 as_ctx->pagelist = NULL; 118 } 119 ceph_fscrypt_as_ctx_to_req(req, as_ctx); 120 } 121 122 /** 123 * ceph_get_inode - find or create/hash a new inode 124 * @sb: superblock to search and allocate in 125 * @vino: vino to search for 126 * @newino: optional new inode to insert if one isn't found (may be NULL) 127 * 128 * Search for or insert a new inode into the hash for the given vino, and 129 * return a reference to it. If new is non-NULL, its reference is consumed. 130 */ 131 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino, 132 struct inode *newino) 133 { 134 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); 135 struct ceph_client *cl = mdsc->fsc->client; 136 struct inode *inode; 137 138 if (ceph_vino_is_reserved(vino)) 139 return ERR_PTR(-EREMOTEIO); 140 141 if (newino) { 142 inode = inode_insert5(newino, (unsigned long)vino.ino, 143 ceph_ino_compare, ceph_set_ino_cb, &vino); 144 if (inode != newino) 145 iput(newino); 146 } else { 147 inode = iget5_locked(sb, (unsigned long)vino.ino, 148 ceph_ino_compare, ceph_set_ino_cb, &vino); 149 } 150 151 if (!inode) { 152 doutc(cl, "no inode found for %llx.%llx\n", vino.ino, vino.snap); 153 return ERR_PTR(-ENOMEM); 154 } 155 156 doutc(cl, "on %llx=%llx.%llx got %p new %d\n", 157 ceph_present_inode(inode), ceph_vinop(inode), inode, 158 !!(inode->i_state & I_NEW)); 159 return inode; 160 } 161 162 /* 163 * get/constuct snapdir inode for a given directory 164 */ 165 struct inode *ceph_get_snapdir(struct inode *parent) 166 { 167 struct ceph_client *cl = ceph_inode_to_client(parent); 168 struct ceph_vino vino = { 169 .ino = ceph_ino(parent), 170 .snap = CEPH_SNAPDIR, 171 }; 172 struct inode *inode = ceph_get_inode(parent->i_sb, vino, NULL); 173 struct ceph_inode_info *ci = ceph_inode(inode); 174 int ret = -ENOTDIR; 175 176 if (IS_ERR(inode)) 177 return inode; 178 179 if (!S_ISDIR(parent->i_mode)) { 180 pr_warn_once_client(cl, "bad snapdir parent type (mode=0%o)\n", 181 parent->i_mode); 182 goto err; 183 } 184 185 if (!(inode->i_state & I_NEW) && !S_ISDIR(inode->i_mode)) { 186 pr_warn_once_client(cl, "bad snapdir inode type (mode=0%o)\n", 187 inode->i_mode); 188 goto err; 189 } 190 191 inode->i_mode = parent->i_mode; 192 inode->i_uid = parent->i_uid; 193 inode->i_gid = parent->i_gid; 194 inode_set_mtime_to_ts(inode, inode_get_mtime(parent)); 195 inode_set_ctime_to_ts(inode, inode_get_ctime(parent)); 196 inode_set_atime_to_ts(inode, inode_get_atime(parent)); 197 ci->i_rbytes = 0; 198 ci->i_btime = ceph_inode(parent)->i_btime; 199 200 #ifdef CONFIG_FS_ENCRYPTION 201 /* if encrypted, just borrow fscrypt_auth from parent */ 202 if (IS_ENCRYPTED(parent)) { 203 struct ceph_inode_info *pci = ceph_inode(parent); 204 205 ci->fscrypt_auth = kmemdup(pci->fscrypt_auth, 206 pci->fscrypt_auth_len, 207 GFP_KERNEL); 208 if (ci->fscrypt_auth) { 209 inode->i_flags |= S_ENCRYPTED; 210 ci->fscrypt_auth_len = pci->fscrypt_auth_len; 211 } else { 212 doutc(cl, "Failed to alloc snapdir fscrypt_auth\n"); 213 ret = -ENOMEM; 214 goto err; 215 } 216 } 217 #endif 218 if (inode->i_state & I_NEW) { 219 inode->i_op = &ceph_snapdir_iops; 220 inode->i_fop = &ceph_snapdir_fops; 221 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ 222 unlock_new_inode(inode); 223 } 224 225 return inode; 226 err: 227 if ((inode->i_state & I_NEW)) 228 discard_new_inode(inode); 229 else 230 iput(inode); 231 return ERR_PTR(ret); 232 } 233 234 const struct inode_operations ceph_file_iops = { 235 .permission = ceph_permission, 236 .setattr = ceph_setattr, 237 .getattr = ceph_getattr, 238 .listxattr = ceph_listxattr, 239 .get_inode_acl = ceph_get_acl, 240 .set_acl = ceph_set_acl, 241 }; 242 243 244 /* 245 * We use a 'frag tree' to keep track of the MDS's directory fragments 246 * for a given inode (usually there is just a single fragment). We 247 * need to know when a child frag is delegated to a new MDS, or when 248 * it is flagged as replicated, so we can direct our requests 249 * accordingly. 250 */ 251 252 /* 253 * find/create a frag in the tree 254 */ 255 static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, 256 u32 f) 257 { 258 struct inode *inode = &ci->netfs.inode; 259 struct ceph_client *cl = ceph_inode_to_client(inode); 260 struct rb_node **p; 261 struct rb_node *parent = NULL; 262 struct ceph_inode_frag *frag; 263 int c; 264 265 p = &ci->i_fragtree.rb_node; 266 while (*p) { 267 parent = *p; 268 frag = rb_entry(parent, struct ceph_inode_frag, node); 269 c = ceph_frag_compare(f, frag->frag); 270 if (c < 0) 271 p = &(*p)->rb_left; 272 else if (c > 0) 273 p = &(*p)->rb_right; 274 else 275 return frag; 276 } 277 278 frag = kmalloc(sizeof(*frag), GFP_NOFS); 279 if (!frag) 280 return ERR_PTR(-ENOMEM); 281 282 frag->frag = f; 283 frag->split_by = 0; 284 frag->mds = -1; 285 frag->ndist = 0; 286 287 rb_link_node(&frag->node, parent, p); 288 rb_insert_color(&frag->node, &ci->i_fragtree); 289 290 doutc(cl, "added %p %llx.%llx frag %x\n", inode, ceph_vinop(inode), f); 291 return frag; 292 } 293 294 /* 295 * find a specific frag @f 296 */ 297 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) 298 { 299 struct rb_node *n = ci->i_fragtree.rb_node; 300 301 while (n) { 302 struct ceph_inode_frag *frag = 303 rb_entry(n, struct ceph_inode_frag, node); 304 int c = ceph_frag_compare(f, frag->frag); 305 if (c < 0) 306 n = n->rb_left; 307 else if (c > 0) 308 n = n->rb_right; 309 else 310 return frag; 311 } 312 return NULL; 313 } 314 315 /* 316 * Choose frag containing the given value @v. If @pfrag is 317 * specified, copy the frag delegation info to the caller if 318 * it is present. 319 */ 320 static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 321 struct ceph_inode_frag *pfrag, int *found) 322 { 323 struct ceph_client *cl = ceph_inode_to_client(&ci->netfs.inode); 324 u32 t = ceph_frag_make(0, 0); 325 struct ceph_inode_frag *frag; 326 unsigned nway, i; 327 u32 n; 328 329 if (found) 330 *found = 0; 331 332 while (1) { 333 WARN_ON(!ceph_frag_contains_value(t, v)); 334 frag = __ceph_find_frag(ci, t); 335 if (!frag) 336 break; /* t is a leaf */ 337 if (frag->split_by == 0) { 338 if (pfrag) 339 memcpy(pfrag, frag, sizeof(*pfrag)); 340 if (found) 341 *found = 1; 342 break; 343 } 344 345 /* choose child */ 346 nway = 1 << frag->split_by; 347 doutc(cl, "frag(%x) %x splits by %d (%d ways)\n", v, t, 348 frag->split_by, nway); 349 for (i = 0; i < nway; i++) { 350 n = ceph_frag_make_child(t, frag->split_by, i); 351 if (ceph_frag_contains_value(n, v)) { 352 t = n; 353 break; 354 } 355 } 356 BUG_ON(i == nway); 357 } 358 doutc(cl, "frag(%x) = %x\n", v, t); 359 360 return t; 361 } 362 363 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 364 struct ceph_inode_frag *pfrag, int *found) 365 { 366 u32 ret; 367 mutex_lock(&ci->i_fragtree_mutex); 368 ret = __ceph_choose_frag(ci, v, pfrag, found); 369 mutex_unlock(&ci->i_fragtree_mutex); 370 return ret; 371 } 372 373 /* 374 * Process dirfrag (delegation) info from the mds. Include leaf 375 * fragment in tree ONLY if ndist > 0. Otherwise, only 376 * branches/splits are included in i_fragtree) 377 */ 378 static int ceph_fill_dirfrag(struct inode *inode, 379 struct ceph_mds_reply_dirfrag *dirinfo) 380 { 381 struct ceph_inode_info *ci = ceph_inode(inode); 382 struct ceph_client *cl = ceph_inode_to_client(inode); 383 struct ceph_inode_frag *frag; 384 u32 id = le32_to_cpu(dirinfo->frag); 385 int mds = le32_to_cpu(dirinfo->auth); 386 int ndist = le32_to_cpu(dirinfo->ndist); 387 int diri_auth = -1; 388 int i; 389 int err = 0; 390 391 spin_lock(&ci->i_ceph_lock); 392 if (ci->i_auth_cap) 393 diri_auth = ci->i_auth_cap->mds; 394 spin_unlock(&ci->i_ceph_lock); 395 396 if (mds == -1) /* CDIR_AUTH_PARENT */ 397 mds = diri_auth; 398 399 mutex_lock(&ci->i_fragtree_mutex); 400 if (ndist == 0 && mds == diri_auth) { 401 /* no delegation info needed. */ 402 frag = __ceph_find_frag(ci, id); 403 if (!frag) 404 goto out; 405 if (frag->split_by == 0) { 406 /* tree leaf, remove */ 407 doutc(cl, "removed %p %llx.%llx frag %x (no ref)\n", 408 inode, ceph_vinop(inode), id); 409 rb_erase(&frag->node, &ci->i_fragtree); 410 kfree(frag); 411 } else { 412 /* tree branch, keep and clear */ 413 doutc(cl, "cleared %p %llx.%llx frag %x referral\n", 414 inode, ceph_vinop(inode), id); 415 frag->mds = -1; 416 frag->ndist = 0; 417 } 418 goto out; 419 } 420 421 422 /* find/add this frag to store mds delegation info */ 423 frag = __get_or_create_frag(ci, id); 424 if (IS_ERR(frag)) { 425 /* this is not the end of the world; we can continue 426 with bad/inaccurate delegation info */ 427 pr_err_client(cl, "ENOMEM on mds ref %p %llx.%llx fg %x\n", 428 inode, ceph_vinop(inode), 429 le32_to_cpu(dirinfo->frag)); 430 err = -ENOMEM; 431 goto out; 432 } 433 434 frag->mds = mds; 435 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); 436 for (i = 0; i < frag->ndist; i++) 437 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); 438 doutc(cl, "%p %llx.%llx frag %x ndist=%d\n", inode, 439 ceph_vinop(inode), frag->frag, frag->ndist); 440 441 out: 442 mutex_unlock(&ci->i_fragtree_mutex); 443 return err; 444 } 445 446 static int frag_tree_split_cmp(const void *l, const void *r) 447 { 448 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l; 449 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r; 450 return ceph_frag_compare(le32_to_cpu(ls->frag), 451 le32_to_cpu(rs->frag)); 452 } 453 454 static bool is_frag_child(u32 f, struct ceph_inode_frag *frag) 455 { 456 if (!frag) 457 return f == ceph_frag_make(0, 0); 458 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by) 459 return false; 460 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f)); 461 } 462 463 static int ceph_fill_fragtree(struct inode *inode, 464 struct ceph_frag_tree_head *fragtree, 465 struct ceph_mds_reply_dirfrag *dirinfo) 466 { 467 struct ceph_client *cl = ceph_inode_to_client(inode); 468 struct ceph_inode_info *ci = ceph_inode(inode); 469 struct ceph_inode_frag *frag, *prev_frag = NULL; 470 struct rb_node *rb_node; 471 unsigned i, split_by, nsplits; 472 u32 id; 473 bool update = false; 474 475 mutex_lock(&ci->i_fragtree_mutex); 476 nsplits = le32_to_cpu(fragtree->nsplits); 477 if (nsplits != ci->i_fragtree_nsplits) { 478 update = true; 479 } else if (nsplits) { 480 i = get_random_u32_below(nsplits); 481 id = le32_to_cpu(fragtree->splits[i].frag); 482 if (!__ceph_find_frag(ci, id)) 483 update = true; 484 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { 485 rb_node = rb_first(&ci->i_fragtree); 486 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 487 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) 488 update = true; 489 } 490 if (!update && dirinfo) { 491 id = le32_to_cpu(dirinfo->frag); 492 if (id != __ceph_choose_frag(ci, id, NULL, NULL)) 493 update = true; 494 } 495 if (!update) 496 goto out_unlock; 497 498 if (nsplits > 1) { 499 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]), 500 frag_tree_split_cmp, NULL); 501 } 502 503 doutc(cl, "%p %llx.%llx\n", inode, ceph_vinop(inode)); 504 rb_node = rb_first(&ci->i_fragtree); 505 for (i = 0; i < nsplits; i++) { 506 id = le32_to_cpu(fragtree->splits[i].frag); 507 split_by = le32_to_cpu(fragtree->splits[i].by); 508 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) { 509 pr_err_client(cl, "%p %llx.%llx invalid split %d/%u, " 510 "frag %x split by %d\n", inode, 511 ceph_vinop(inode), i, nsplits, id, split_by); 512 continue; 513 } 514 frag = NULL; 515 while (rb_node) { 516 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 517 if (ceph_frag_compare(frag->frag, id) >= 0) { 518 if (frag->frag != id) 519 frag = NULL; 520 else 521 rb_node = rb_next(rb_node); 522 break; 523 } 524 rb_node = rb_next(rb_node); 525 /* delete stale split/leaf node */ 526 if (frag->split_by > 0 || 527 !is_frag_child(frag->frag, prev_frag)) { 528 rb_erase(&frag->node, &ci->i_fragtree); 529 if (frag->split_by > 0) 530 ci->i_fragtree_nsplits--; 531 kfree(frag); 532 } 533 frag = NULL; 534 } 535 if (!frag) { 536 frag = __get_or_create_frag(ci, id); 537 if (IS_ERR(frag)) 538 continue; 539 } 540 if (frag->split_by == 0) 541 ci->i_fragtree_nsplits++; 542 frag->split_by = split_by; 543 doutc(cl, " frag %x split by %d\n", frag->frag, frag->split_by); 544 prev_frag = frag; 545 } 546 while (rb_node) { 547 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 548 rb_node = rb_next(rb_node); 549 /* delete stale split/leaf node */ 550 if (frag->split_by > 0 || 551 !is_frag_child(frag->frag, prev_frag)) { 552 rb_erase(&frag->node, &ci->i_fragtree); 553 if (frag->split_by > 0) 554 ci->i_fragtree_nsplits--; 555 kfree(frag); 556 } 557 } 558 out_unlock: 559 mutex_unlock(&ci->i_fragtree_mutex); 560 return 0; 561 } 562 563 /* 564 * initialize a newly allocated inode. 565 */ 566 struct inode *ceph_alloc_inode(struct super_block *sb) 567 { 568 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb); 569 struct ceph_inode_info *ci; 570 int i; 571 572 ci = alloc_inode_sb(sb, ceph_inode_cachep, GFP_NOFS); 573 if (!ci) 574 return NULL; 575 576 doutc(fsc->client, "%p\n", &ci->netfs.inode); 577 578 /* Set parameters for the netfs library */ 579 netfs_inode_init(&ci->netfs, &ceph_netfs_ops, false); 580 /* [DEPRECATED] Use PG_private_2 to mark folio being written to the cache. */ 581 __set_bit(NETFS_ICTX_USE_PGPRIV2, &ci->netfs.flags); 582 583 spin_lock_init(&ci->i_ceph_lock); 584 585 ci->i_version = 0; 586 ci->i_inline_version = 0; 587 ci->i_time_warp_seq = 0; 588 ci->i_ceph_flags = 0; 589 atomic64_set(&ci->i_ordered_count, 1); 590 atomic64_set(&ci->i_release_count, 1); 591 atomic64_set(&ci->i_complete_seq[0], 0); 592 atomic64_set(&ci->i_complete_seq[1], 0); 593 ci->i_symlink = NULL; 594 595 ci->i_max_bytes = 0; 596 ci->i_max_files = 0; 597 598 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); 599 memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout)); 600 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL); 601 602 ci->i_fragtree = RB_ROOT; 603 mutex_init(&ci->i_fragtree_mutex); 604 605 ci->i_xattrs.blob = NULL; 606 ci->i_xattrs.prealloc_blob = NULL; 607 ci->i_xattrs.dirty = false; 608 ci->i_xattrs.index = RB_ROOT; 609 ci->i_xattrs.count = 0; 610 ci->i_xattrs.names_size = 0; 611 ci->i_xattrs.vals_size = 0; 612 ci->i_xattrs.version = 0; 613 ci->i_xattrs.index_version = 0; 614 615 ci->i_caps = RB_ROOT; 616 ci->i_auth_cap = NULL; 617 ci->i_dirty_caps = 0; 618 ci->i_flushing_caps = 0; 619 INIT_LIST_HEAD(&ci->i_dirty_item); 620 INIT_LIST_HEAD(&ci->i_flushing_item); 621 ci->i_prealloc_cap_flush = NULL; 622 INIT_LIST_HEAD(&ci->i_cap_flush_list); 623 init_waitqueue_head(&ci->i_cap_wq); 624 ci->i_hold_caps_max = 0; 625 INIT_LIST_HEAD(&ci->i_cap_delay_list); 626 INIT_LIST_HEAD(&ci->i_cap_snaps); 627 ci->i_head_snapc = NULL; 628 ci->i_snap_caps = 0; 629 630 ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ; 631 for (i = 0; i < CEPH_FILE_MODE_BITS; i++) 632 ci->i_nr_by_mode[i] = 0; 633 634 mutex_init(&ci->i_truncate_mutex); 635 ci->i_truncate_seq = 0; 636 ci->i_truncate_size = 0; 637 ci->i_truncate_pending = 0; 638 ci->i_truncate_pagecache_size = 0; 639 640 ci->i_max_size = 0; 641 ci->i_reported_size = 0; 642 ci->i_wanted_max_size = 0; 643 ci->i_requested_max_size = 0; 644 645 ci->i_pin_ref = 0; 646 ci->i_rd_ref = 0; 647 ci->i_rdcache_ref = 0; 648 ci->i_wr_ref = 0; 649 ci->i_wb_ref = 0; 650 ci->i_fx_ref = 0; 651 ci->i_wrbuffer_ref = 0; 652 ci->i_wrbuffer_ref_head = 0; 653 atomic_set(&ci->i_filelock_ref, 0); 654 atomic_set(&ci->i_shared_gen, 1); 655 ci->i_rdcache_gen = 0; 656 ci->i_rdcache_revoking = 0; 657 658 INIT_LIST_HEAD(&ci->i_unsafe_dirops); 659 INIT_LIST_HEAD(&ci->i_unsafe_iops); 660 spin_lock_init(&ci->i_unsafe_lock); 661 662 ci->i_snap_realm = NULL; 663 INIT_LIST_HEAD(&ci->i_snap_realm_item); 664 INIT_LIST_HEAD(&ci->i_snap_flush_item); 665 666 INIT_WORK(&ci->i_work, ceph_inode_work); 667 ci->i_work_mask = 0; 668 memset(&ci->i_btime, '\0', sizeof(ci->i_btime)); 669 #ifdef CONFIG_FS_ENCRYPTION 670 ci->fscrypt_auth = NULL; 671 ci->fscrypt_auth_len = 0; 672 #endif 673 return &ci->netfs.inode; 674 } 675 676 void ceph_free_inode(struct inode *inode) 677 { 678 struct ceph_inode_info *ci = ceph_inode(inode); 679 680 kfree(ci->i_symlink); 681 #ifdef CONFIG_FS_ENCRYPTION 682 kfree(ci->fscrypt_auth); 683 #endif 684 fscrypt_free_inode(inode); 685 kmem_cache_free(ceph_inode_cachep, ci); 686 } 687 688 void ceph_evict_inode(struct inode *inode) 689 { 690 struct ceph_inode_info *ci = ceph_inode(inode); 691 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 692 struct ceph_client *cl = ceph_inode_to_client(inode); 693 struct ceph_inode_frag *frag; 694 struct rb_node *n; 695 696 doutc(cl, "%p ino %llx.%llx\n", inode, ceph_vinop(inode)); 697 698 percpu_counter_dec(&mdsc->metric.total_inodes); 699 700 truncate_inode_pages_final(&inode->i_data); 701 if (inode->i_state & I_PINNING_NETFS_WB) 702 ceph_fscache_unuse_cookie(inode, true); 703 clear_inode(inode); 704 705 ceph_fscache_unregister_inode_cookie(ci); 706 fscrypt_put_encryption_info(inode); 707 708 __ceph_remove_caps(ci); 709 710 if (__ceph_has_quota(ci, QUOTA_GET_ANY)) 711 ceph_adjust_quota_realms_count(inode, false); 712 713 /* 714 * we may still have a snap_realm reference if there are stray 715 * caps in i_snap_caps. 716 */ 717 if (ci->i_snap_realm) { 718 if (ceph_snap(inode) == CEPH_NOSNAP) { 719 doutc(cl, " dropping residual ref to snap realm %p\n", 720 ci->i_snap_realm); 721 ceph_change_snap_realm(inode, NULL); 722 } else { 723 ceph_put_snapid_map(mdsc, ci->i_snapid_map); 724 ci->i_snap_realm = NULL; 725 } 726 } 727 728 while ((n = rb_first(&ci->i_fragtree)) != NULL) { 729 frag = rb_entry(n, struct ceph_inode_frag, node); 730 rb_erase(n, &ci->i_fragtree); 731 kfree(frag); 732 } 733 ci->i_fragtree_nsplits = 0; 734 735 __ceph_destroy_xattrs(ci); 736 if (ci->i_xattrs.blob) 737 ceph_buffer_put(ci->i_xattrs.blob); 738 if (ci->i_xattrs.prealloc_blob) 739 ceph_buffer_put(ci->i_xattrs.prealloc_blob); 740 741 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns)); 742 ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns)); 743 } 744 745 static inline blkcnt_t calc_inode_blocks(u64 size) 746 { 747 return (size + (1<<9) - 1) >> 9; 748 } 749 750 /* 751 * Helpers to fill in size, ctime, mtime, and atime. We have to be 752 * careful because either the client or MDS may have more up to date 753 * info, depending on which capabilities are held, and whether 754 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime 755 * and size are monotonically increasing, except when utimes() or 756 * truncate() increments the corresponding _seq values.) 757 */ 758 int ceph_fill_file_size(struct inode *inode, int issued, 759 u32 truncate_seq, u64 truncate_size, u64 size) 760 { 761 struct ceph_client *cl = ceph_inode_to_client(inode); 762 struct ceph_inode_info *ci = ceph_inode(inode); 763 int queue_trunc = 0; 764 loff_t isize = i_size_read(inode); 765 766 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || 767 (truncate_seq == ci->i_truncate_seq && size > isize)) { 768 doutc(cl, "size %lld -> %llu\n", isize, size); 769 if (size > 0 && S_ISDIR(inode->i_mode)) { 770 pr_err_client(cl, "non-zero size for directory\n"); 771 size = 0; 772 } 773 i_size_write(inode, size); 774 inode->i_blocks = calc_inode_blocks(size); 775 /* 776 * If we're expanding, then we should be able to just update 777 * the existing cookie. 778 */ 779 if (size > isize) 780 ceph_fscache_update(inode); 781 ci->i_reported_size = size; 782 if (truncate_seq != ci->i_truncate_seq) { 783 doutc(cl, "truncate_seq %u -> %u\n", 784 ci->i_truncate_seq, truncate_seq); 785 ci->i_truncate_seq = truncate_seq; 786 787 /* the MDS should have revoked these caps */ 788 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_RD | 789 CEPH_CAP_FILE_LAZYIO)); 790 /* 791 * If we hold relevant caps, or in the case where we're 792 * not the only client referencing this file and we 793 * don't hold those caps, then we need to check whether 794 * the file is either opened or mmaped 795 */ 796 if ((issued & (CEPH_CAP_FILE_CACHE| 797 CEPH_CAP_FILE_BUFFER)) || 798 mapping_mapped(inode->i_mapping) || 799 __ceph_is_file_opened(ci)) { 800 ci->i_truncate_pending++; 801 queue_trunc = 1; 802 } 803 } 804 } 805 806 /* 807 * It's possible that the new sizes of the two consecutive 808 * size truncations will be in the same fscrypt last block, 809 * and we need to truncate the corresponding page caches 810 * anyway. 811 */ 812 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0) { 813 doutc(cl, "truncate_size %lld -> %llu, encrypted %d\n", 814 ci->i_truncate_size, truncate_size, 815 !!IS_ENCRYPTED(inode)); 816 817 ci->i_truncate_size = truncate_size; 818 819 if (IS_ENCRYPTED(inode)) { 820 doutc(cl, "truncate_pagecache_size %lld -> %llu\n", 821 ci->i_truncate_pagecache_size, size); 822 ci->i_truncate_pagecache_size = size; 823 } else { 824 ci->i_truncate_pagecache_size = truncate_size; 825 } 826 } 827 return queue_trunc; 828 } 829 830 void ceph_fill_file_time(struct inode *inode, int issued, 831 u64 time_warp_seq, struct timespec64 *ctime, 832 struct timespec64 *mtime, struct timespec64 *atime) 833 { 834 struct ceph_client *cl = ceph_inode_to_client(inode); 835 struct ceph_inode_info *ci = ceph_inode(inode); 836 struct timespec64 ictime = inode_get_ctime(inode); 837 int warn = 0; 838 839 if (issued & (CEPH_CAP_FILE_EXCL| 840 CEPH_CAP_FILE_WR| 841 CEPH_CAP_FILE_BUFFER| 842 CEPH_CAP_AUTH_EXCL| 843 CEPH_CAP_XATTR_EXCL)) { 844 if (ci->i_version == 0 || 845 timespec64_compare(ctime, &ictime) > 0) { 846 doutc(cl, "ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n", 847 ictime.tv_sec, ictime.tv_nsec, 848 ctime->tv_sec, ctime->tv_nsec); 849 inode_set_ctime_to_ts(inode, *ctime); 850 } 851 if (ci->i_version == 0 || 852 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { 853 /* the MDS did a utimes() */ 854 doutc(cl, "mtime %lld.%09ld -> %lld.%09ld tw %d -> %d\n", 855 inode_get_mtime_sec(inode), 856 inode_get_mtime_nsec(inode), 857 mtime->tv_sec, mtime->tv_nsec, 858 ci->i_time_warp_seq, (int)time_warp_seq); 859 860 inode_set_mtime_to_ts(inode, *mtime); 861 inode_set_atime_to_ts(inode, *atime); 862 ci->i_time_warp_seq = time_warp_seq; 863 } else if (time_warp_seq == ci->i_time_warp_seq) { 864 struct timespec64 ts; 865 866 /* nobody did utimes(); take the max */ 867 ts = inode_get_mtime(inode); 868 if (timespec64_compare(mtime, &ts) > 0) { 869 doutc(cl, "mtime %lld.%09ld -> %lld.%09ld inc\n", 870 ts.tv_sec, ts.tv_nsec, 871 mtime->tv_sec, mtime->tv_nsec); 872 inode_set_mtime_to_ts(inode, *mtime); 873 } 874 ts = inode_get_atime(inode); 875 if (timespec64_compare(atime, &ts) > 0) { 876 doutc(cl, "atime %lld.%09ld -> %lld.%09ld inc\n", 877 ts.tv_sec, ts.tv_nsec, 878 atime->tv_sec, atime->tv_nsec); 879 inode_set_atime_to_ts(inode, *atime); 880 } 881 } else if (issued & CEPH_CAP_FILE_EXCL) { 882 /* we did a utimes(); ignore mds values */ 883 } else { 884 warn = 1; 885 } 886 } else { 887 /* we have no write|excl caps; whatever the MDS says is true */ 888 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { 889 inode_set_ctime_to_ts(inode, *ctime); 890 inode_set_mtime_to_ts(inode, *mtime); 891 inode_set_atime_to_ts(inode, *atime); 892 ci->i_time_warp_seq = time_warp_seq; 893 } else { 894 warn = 1; 895 } 896 } 897 if (warn) /* time_warp_seq shouldn't go backwards */ 898 doutc(cl, "%p mds time_warp_seq %llu < %u\n", inode, 899 time_warp_seq, ci->i_time_warp_seq); 900 } 901 902 #if IS_ENABLED(CONFIG_FS_ENCRYPTION) 903 static int decode_encrypted_symlink(struct ceph_mds_client *mdsc, 904 const char *encsym, 905 int enclen, u8 **decsym) 906 { 907 struct ceph_client *cl = mdsc->fsc->client; 908 int declen; 909 u8 *sym; 910 911 sym = kmalloc(enclen + 1, GFP_NOFS); 912 if (!sym) 913 return -ENOMEM; 914 915 declen = ceph_base64_decode(encsym, enclen, sym); 916 if (declen < 0) { 917 pr_err_client(cl, 918 "can't decode symlink (%d). Content: %.*s\n", 919 declen, enclen, encsym); 920 kfree(sym); 921 return -EIO; 922 } 923 sym[declen + 1] = '\0'; 924 *decsym = sym; 925 return declen; 926 } 927 #else 928 static int decode_encrypted_symlink(struct ceph_mds_client *mdsc, 929 const char *encsym, 930 int symlen, u8 **decsym) 931 { 932 return -EOPNOTSUPP; 933 } 934 #endif 935 936 /* 937 * Populate an inode based on info from mds. May be called on new or 938 * existing inodes. 939 */ 940 int ceph_fill_inode(struct inode *inode, struct page *locked_page, 941 struct ceph_mds_reply_info_in *iinfo, 942 struct ceph_mds_reply_dirfrag *dirinfo, 943 struct ceph_mds_session *session, int cap_fmode, 944 struct ceph_cap_reservation *caps_reservation) 945 { 946 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 947 struct ceph_client *cl = mdsc->fsc->client; 948 struct ceph_mds_reply_inode *info = iinfo->in; 949 struct ceph_inode_info *ci = ceph_inode(inode); 950 int issued, new_issued, info_caps; 951 struct timespec64 mtime, atime, ctime; 952 struct ceph_buffer *xattr_blob = NULL; 953 struct ceph_buffer *old_blob = NULL; 954 struct ceph_string *pool_ns = NULL; 955 struct ceph_cap *new_cap = NULL; 956 int err = 0; 957 bool wake = false; 958 bool queue_trunc = false; 959 bool new_version = false; 960 bool fill_inline = false; 961 umode_t mode = le32_to_cpu(info->mode); 962 dev_t rdev = le32_to_cpu(info->rdev); 963 964 lockdep_assert_held(&mdsc->snap_rwsem); 965 966 doutc(cl, "%p ino %llx.%llx v %llu had %llu\n", inode, ceph_vinop(inode), 967 le64_to_cpu(info->version), ci->i_version); 968 969 /* Once I_NEW is cleared, we can't change type or dev numbers */ 970 if (inode->i_state & I_NEW) { 971 inode->i_mode = mode; 972 } else { 973 if (inode_wrong_type(inode, mode)) { 974 pr_warn_once_client(cl, 975 "inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n", 976 ceph_vinop(inode), inode->i_mode, mode); 977 return -ESTALE; 978 } 979 980 if ((S_ISCHR(mode) || S_ISBLK(mode)) && inode->i_rdev != rdev) { 981 pr_warn_once_client(cl, 982 "dev inode rdev changed! (ino %llx.%llx is %u:%u, mds says %u:%u)\n", 983 ceph_vinop(inode), MAJOR(inode->i_rdev), 984 MINOR(inode->i_rdev), MAJOR(rdev), 985 MINOR(rdev)); 986 return -ESTALE; 987 } 988 } 989 990 info_caps = le32_to_cpu(info->cap.caps); 991 992 /* prealloc new cap struct */ 993 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) { 994 new_cap = ceph_get_cap(mdsc, caps_reservation); 995 if (!new_cap) 996 return -ENOMEM; 997 } 998 999 /* 1000 * prealloc xattr data, if it looks like we'll need it. only 1001 * if len > 4 (meaning there are actually xattrs; the first 4 1002 * bytes are the xattr count). 1003 */ 1004 if (iinfo->xattr_len > 4) { 1005 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); 1006 if (!xattr_blob) 1007 pr_err_client(cl, "ENOMEM xattr blob %d bytes\n", 1008 iinfo->xattr_len); 1009 } 1010 1011 if (iinfo->pool_ns_len > 0) 1012 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data, 1013 iinfo->pool_ns_len); 1014 1015 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map) 1016 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode)); 1017 1018 spin_lock(&ci->i_ceph_lock); 1019 1020 /* 1021 * provided version will be odd if inode value is projected, 1022 * even if stable. skip the update if we have newer stable 1023 * info (ours>=theirs, e.g. due to racing mds replies), unless 1024 * we are getting projected (unstable) info (in which case the 1025 * version is odd, and we want ours>theirs). 1026 * us them 1027 * 2 2 skip 1028 * 3 2 skip 1029 * 3 3 update 1030 */ 1031 if (ci->i_version == 0 || 1032 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 1033 le64_to_cpu(info->version) > (ci->i_version & ~1))) 1034 new_version = true; 1035 1036 /* Update change_attribute */ 1037 inode_set_max_iversion_raw(inode, iinfo->change_attr); 1038 1039 __ceph_caps_issued(ci, &issued); 1040 issued |= __ceph_caps_dirty(ci); 1041 new_issued = ~issued & info_caps; 1042 1043 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files); 1044 1045 #ifdef CONFIG_FS_ENCRYPTION 1046 if (iinfo->fscrypt_auth_len && 1047 ((inode->i_state & I_NEW) || (ci->fscrypt_auth_len == 0))) { 1048 kfree(ci->fscrypt_auth); 1049 ci->fscrypt_auth_len = iinfo->fscrypt_auth_len; 1050 ci->fscrypt_auth = iinfo->fscrypt_auth; 1051 iinfo->fscrypt_auth = NULL; 1052 iinfo->fscrypt_auth_len = 0; 1053 inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED); 1054 } 1055 #endif 1056 1057 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && 1058 (issued & CEPH_CAP_AUTH_EXCL) == 0) { 1059 inode->i_mode = mode; 1060 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); 1061 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); 1062 doutc(cl, "%p %llx.%llx mode 0%o uid.gid %d.%d\n", inode, 1063 ceph_vinop(inode), inode->i_mode, 1064 from_kuid(&init_user_ns, inode->i_uid), 1065 from_kgid(&init_user_ns, inode->i_gid)); 1066 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime); 1067 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime); 1068 } 1069 1070 /* directories have fl_stripe_unit set to zero */ 1071 if (IS_ENCRYPTED(inode)) 1072 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT; 1073 else if (le32_to_cpu(info->layout.fl_stripe_unit)) 1074 inode->i_blkbits = 1075 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; 1076 else 1077 inode->i_blkbits = CEPH_BLOCK_SHIFT; 1078 1079 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && 1080 (issued & CEPH_CAP_LINK_EXCL) == 0) 1081 set_nlink(inode, le32_to_cpu(info->nlink)); 1082 1083 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { 1084 /* be careful with mtime, atime, size */ 1085 ceph_decode_timespec64(&atime, &info->atime); 1086 ceph_decode_timespec64(&mtime, &info->mtime); 1087 ceph_decode_timespec64(&ctime, &info->ctime); 1088 ceph_fill_file_time(inode, issued, 1089 le32_to_cpu(info->time_warp_seq), 1090 &ctime, &mtime, &atime); 1091 } 1092 1093 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) { 1094 ci->i_files = le64_to_cpu(info->files); 1095 ci->i_subdirs = le64_to_cpu(info->subdirs); 1096 } 1097 1098 if (new_version || 1099 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { 1100 u64 size = le64_to_cpu(info->size); 1101 s64 old_pool = ci->i_layout.pool_id; 1102 struct ceph_string *old_ns; 1103 1104 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout); 1105 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, 1106 lockdep_is_held(&ci->i_ceph_lock)); 1107 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns); 1108 1109 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns) 1110 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; 1111 1112 pool_ns = old_ns; 1113 1114 if (IS_ENCRYPTED(inode) && size && 1115 iinfo->fscrypt_file_len == sizeof(__le64)) { 1116 u64 fsize = __le64_to_cpu(*(__le64 *)iinfo->fscrypt_file); 1117 1118 if (size == round_up(fsize, CEPH_FSCRYPT_BLOCK_SIZE)) { 1119 size = fsize; 1120 } else { 1121 pr_warn_client(cl, 1122 "fscrypt size mismatch: size=%llu fscrypt_file=%llu, discarding fscrypt_file size.\n", 1123 info->size, size); 1124 } 1125 } 1126 1127 queue_trunc = ceph_fill_file_size(inode, issued, 1128 le32_to_cpu(info->truncate_seq), 1129 le64_to_cpu(info->truncate_size), 1130 size); 1131 /* only update max_size on auth cap */ 1132 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 1133 ci->i_max_size != le64_to_cpu(info->max_size)) { 1134 doutc(cl, "max_size %lld -> %llu\n", 1135 ci->i_max_size, le64_to_cpu(info->max_size)); 1136 ci->i_max_size = le64_to_cpu(info->max_size); 1137 } 1138 } 1139 1140 /* layout and rstat are not tracked by capability, update them if 1141 * the inode info is from auth mds */ 1142 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) { 1143 if (S_ISDIR(inode->i_mode)) { 1144 ci->i_dir_layout = iinfo->dir_layout; 1145 ci->i_rbytes = le64_to_cpu(info->rbytes); 1146 ci->i_rfiles = le64_to_cpu(info->rfiles); 1147 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); 1148 ci->i_dir_pin = iinfo->dir_pin; 1149 ci->i_rsnaps = iinfo->rsnaps; 1150 ceph_decode_timespec64(&ci->i_rctime, &info->rctime); 1151 } 1152 } 1153 1154 /* xattrs */ 1155 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ 1156 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && 1157 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { 1158 if (ci->i_xattrs.blob) 1159 old_blob = ci->i_xattrs.blob; 1160 ci->i_xattrs.blob = xattr_blob; 1161 if (xattr_blob) 1162 memcpy(ci->i_xattrs.blob->vec.iov_base, 1163 iinfo->xattr_data, iinfo->xattr_len); 1164 ci->i_xattrs.version = le64_to_cpu(info->xattr_version); 1165 ceph_forget_all_cached_acls(inode); 1166 ceph_security_invalidate_secctx(inode); 1167 xattr_blob = NULL; 1168 } 1169 1170 /* finally update i_version */ 1171 if (le64_to_cpu(info->version) > ci->i_version) 1172 ci->i_version = le64_to_cpu(info->version); 1173 1174 inode->i_mapping->a_ops = &ceph_aops; 1175 1176 switch (inode->i_mode & S_IFMT) { 1177 case S_IFIFO: 1178 case S_IFBLK: 1179 case S_IFCHR: 1180 case S_IFSOCK: 1181 inode->i_blkbits = PAGE_SHIFT; 1182 init_special_inode(inode, inode->i_mode, rdev); 1183 inode->i_op = &ceph_file_iops; 1184 break; 1185 case S_IFREG: 1186 inode->i_op = &ceph_file_iops; 1187 inode->i_fop = &ceph_file_fops; 1188 break; 1189 case S_IFLNK: 1190 if (!ci->i_symlink) { 1191 u32 symlen = iinfo->symlink_len; 1192 char *sym; 1193 1194 spin_unlock(&ci->i_ceph_lock); 1195 1196 if (IS_ENCRYPTED(inode)) { 1197 if (symlen != i_size_read(inode)) 1198 pr_err_client(cl, 1199 "%p %llx.%llx BAD symlink size %lld\n", 1200 inode, ceph_vinop(inode), 1201 i_size_read(inode)); 1202 1203 err = decode_encrypted_symlink(mdsc, iinfo->symlink, 1204 symlen, (u8 **)&sym); 1205 if (err < 0) { 1206 pr_err_client(cl, 1207 "decoding encrypted symlink failed: %d\n", 1208 err); 1209 goto out; 1210 } 1211 symlen = err; 1212 i_size_write(inode, symlen); 1213 inode->i_blocks = calc_inode_blocks(symlen); 1214 } else { 1215 if (symlen != i_size_read(inode)) { 1216 pr_err_client(cl, 1217 "%p %llx.%llx BAD symlink size %lld\n", 1218 inode, ceph_vinop(inode), 1219 i_size_read(inode)); 1220 i_size_write(inode, symlen); 1221 inode->i_blocks = calc_inode_blocks(symlen); 1222 } 1223 1224 err = -ENOMEM; 1225 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); 1226 if (!sym) 1227 goto out; 1228 } 1229 1230 spin_lock(&ci->i_ceph_lock); 1231 if (!ci->i_symlink) 1232 ci->i_symlink = sym; 1233 else 1234 kfree(sym); /* lost a race */ 1235 } 1236 1237 if (IS_ENCRYPTED(inode)) { 1238 /* 1239 * Encrypted symlinks need to be decrypted before we can 1240 * cache their targets in i_link. Don't touch it here. 1241 */ 1242 inode->i_op = &ceph_encrypted_symlink_iops; 1243 } else { 1244 inode->i_link = ci->i_symlink; 1245 inode->i_op = &ceph_symlink_iops; 1246 } 1247 break; 1248 case S_IFDIR: 1249 inode->i_op = &ceph_dir_iops; 1250 inode->i_fop = &ceph_dir_fops; 1251 break; 1252 default: 1253 pr_err_client(cl, "%p %llx.%llx BAD mode 0%o\n", inode, 1254 ceph_vinop(inode), inode->i_mode); 1255 } 1256 1257 /* were we issued a capability? */ 1258 if (info_caps) { 1259 if (ceph_snap(inode) == CEPH_NOSNAP) { 1260 ceph_add_cap(inode, session, 1261 le64_to_cpu(info->cap.cap_id), 1262 info_caps, 1263 le32_to_cpu(info->cap.wanted), 1264 le32_to_cpu(info->cap.seq), 1265 le32_to_cpu(info->cap.mseq), 1266 le64_to_cpu(info->cap.realm), 1267 info->cap.flags, &new_cap); 1268 1269 /* set dir completion flag? */ 1270 if (S_ISDIR(inode->i_mode) && 1271 ci->i_files == 0 && ci->i_subdirs == 0 && 1272 (info_caps & CEPH_CAP_FILE_SHARED) && 1273 (issued & CEPH_CAP_FILE_EXCL) == 0 && 1274 !__ceph_dir_is_complete(ci)) { 1275 doutc(cl, " marking %p complete (empty)\n", 1276 inode); 1277 i_size_write(inode, 0); 1278 __ceph_dir_set_complete(ci, 1279 atomic64_read(&ci->i_release_count), 1280 atomic64_read(&ci->i_ordered_count)); 1281 } 1282 1283 wake = true; 1284 } else { 1285 doutc(cl, " %p got snap_caps %s\n", inode, 1286 ceph_cap_string(info_caps)); 1287 ci->i_snap_caps |= info_caps; 1288 } 1289 } 1290 1291 if (iinfo->inline_version > 0 && 1292 iinfo->inline_version >= ci->i_inline_version) { 1293 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; 1294 ci->i_inline_version = iinfo->inline_version; 1295 if (ceph_has_inline_data(ci) && 1296 (locked_page || (info_caps & cache_caps))) 1297 fill_inline = true; 1298 } 1299 1300 if (cap_fmode >= 0) { 1301 if (!info_caps) 1302 pr_warn_client(cl, "mds issued no caps on %llx.%llx\n", 1303 ceph_vinop(inode)); 1304 __ceph_touch_fmode(ci, mdsc, cap_fmode); 1305 } 1306 1307 spin_unlock(&ci->i_ceph_lock); 1308 1309 ceph_fscache_register_inode_cookie(inode); 1310 1311 if (fill_inline) 1312 ceph_fill_inline_data(inode, locked_page, 1313 iinfo->inline_data, iinfo->inline_len); 1314 1315 if (wake) 1316 wake_up_all(&ci->i_cap_wq); 1317 1318 /* queue truncate if we saw i_size decrease */ 1319 if (queue_trunc) 1320 ceph_queue_vmtruncate(inode); 1321 1322 /* populate frag tree */ 1323 if (S_ISDIR(inode->i_mode)) 1324 ceph_fill_fragtree(inode, &info->fragtree, dirinfo); 1325 1326 /* update delegation info? */ 1327 if (dirinfo) 1328 ceph_fill_dirfrag(inode, dirinfo); 1329 1330 err = 0; 1331 out: 1332 if (new_cap) 1333 ceph_put_cap(mdsc, new_cap); 1334 ceph_buffer_put(old_blob); 1335 ceph_buffer_put(xattr_blob); 1336 ceph_put_string(pool_ns); 1337 return err; 1338 } 1339 1340 /* 1341 * caller should hold session s_mutex and dentry->d_lock. 1342 */ 1343 static void __update_dentry_lease(struct inode *dir, struct dentry *dentry, 1344 struct ceph_mds_reply_lease *lease, 1345 struct ceph_mds_session *session, 1346 unsigned long from_time, 1347 struct ceph_mds_session **old_lease_session) 1348 { 1349 struct ceph_client *cl = ceph_inode_to_client(dir); 1350 struct ceph_dentry_info *di = ceph_dentry(dentry); 1351 unsigned mask = le16_to_cpu(lease->mask); 1352 long unsigned duration = le32_to_cpu(lease->duration_ms); 1353 long unsigned ttl = from_time + (duration * HZ) / 1000; 1354 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; 1355 1356 doutc(cl, "%p duration %lu ms ttl %lu\n", dentry, duration, ttl); 1357 1358 /* only track leases on regular dentries */ 1359 if (ceph_snap(dir) != CEPH_NOSNAP) 1360 return; 1361 1362 if (mask & CEPH_LEASE_PRIMARY_LINK) 1363 di->flags |= CEPH_DENTRY_PRIMARY_LINK; 1364 else 1365 di->flags &= ~CEPH_DENTRY_PRIMARY_LINK; 1366 1367 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen); 1368 if (!(mask & CEPH_LEASE_VALID)) { 1369 __ceph_dentry_dir_lease_touch(di); 1370 return; 1371 } 1372 1373 if (di->lease_gen == atomic_read(&session->s_cap_gen) && 1374 time_before(ttl, di->time)) 1375 return; /* we already have a newer lease. */ 1376 1377 if (di->lease_session && di->lease_session != session) { 1378 *old_lease_session = di->lease_session; 1379 di->lease_session = NULL; 1380 } 1381 1382 if (!di->lease_session) 1383 di->lease_session = ceph_get_mds_session(session); 1384 di->lease_gen = atomic_read(&session->s_cap_gen); 1385 di->lease_seq = le32_to_cpu(lease->seq); 1386 di->lease_renew_after = half_ttl; 1387 di->lease_renew_from = 0; 1388 di->time = ttl; 1389 1390 __ceph_dentry_lease_touch(di); 1391 } 1392 1393 static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry, 1394 struct ceph_mds_reply_lease *lease, 1395 struct ceph_mds_session *session, 1396 unsigned long from_time) 1397 { 1398 struct ceph_mds_session *old_lease_session = NULL; 1399 spin_lock(&dentry->d_lock); 1400 __update_dentry_lease(dir, dentry, lease, session, from_time, 1401 &old_lease_session); 1402 spin_unlock(&dentry->d_lock); 1403 ceph_put_mds_session(old_lease_session); 1404 } 1405 1406 /* 1407 * update dentry lease without having parent inode locked 1408 */ 1409 static void update_dentry_lease_careful(struct dentry *dentry, 1410 struct ceph_mds_reply_lease *lease, 1411 struct ceph_mds_session *session, 1412 unsigned long from_time, 1413 char *dname, u32 dname_len, 1414 struct ceph_vino *pdvino, 1415 struct ceph_vino *ptvino) 1416 1417 { 1418 struct inode *dir; 1419 struct ceph_mds_session *old_lease_session = NULL; 1420 1421 spin_lock(&dentry->d_lock); 1422 /* make sure dentry's name matches target */ 1423 if (dentry->d_name.len != dname_len || 1424 memcmp(dentry->d_name.name, dname, dname_len)) 1425 goto out_unlock; 1426 1427 dir = d_inode(dentry->d_parent); 1428 /* make sure parent matches dvino */ 1429 if (!ceph_ino_compare(dir, pdvino)) 1430 goto out_unlock; 1431 1432 /* make sure dentry's inode matches target. NULL ptvino means that 1433 * we expect a negative dentry */ 1434 if (ptvino) { 1435 if (d_really_is_negative(dentry)) 1436 goto out_unlock; 1437 if (!ceph_ino_compare(d_inode(dentry), ptvino)) 1438 goto out_unlock; 1439 } else { 1440 if (d_really_is_positive(dentry)) 1441 goto out_unlock; 1442 } 1443 1444 __update_dentry_lease(dir, dentry, lease, session, 1445 from_time, &old_lease_session); 1446 out_unlock: 1447 spin_unlock(&dentry->d_lock); 1448 ceph_put_mds_session(old_lease_session); 1449 } 1450 1451 /* 1452 * splice a dentry to an inode. 1453 * caller must hold directory i_rwsem for this to be safe. 1454 */ 1455 static int splice_dentry(struct dentry **pdn, struct inode *in) 1456 { 1457 struct ceph_client *cl = ceph_inode_to_client(in); 1458 struct dentry *dn = *pdn; 1459 struct dentry *realdn; 1460 1461 BUG_ON(d_inode(dn)); 1462 1463 if (S_ISDIR(in->i_mode)) { 1464 /* If inode is directory, d_splice_alias() below will remove 1465 * 'realdn' from its origin parent. We need to ensure that 1466 * origin parent's readdir cache will not reference 'realdn' 1467 */ 1468 realdn = d_find_any_alias(in); 1469 if (realdn) { 1470 struct ceph_dentry_info *di = ceph_dentry(realdn); 1471 spin_lock(&realdn->d_lock); 1472 1473 realdn->d_op->d_prune(realdn); 1474 1475 di->time = jiffies; 1476 di->lease_shared_gen = 0; 1477 di->offset = 0; 1478 1479 spin_unlock(&realdn->d_lock); 1480 dput(realdn); 1481 } 1482 } 1483 1484 /* dn must be unhashed */ 1485 if (!d_unhashed(dn)) 1486 d_drop(dn); 1487 realdn = d_splice_alias(in, dn); 1488 if (IS_ERR(realdn)) { 1489 pr_err_client(cl, "error %ld %p inode %p ino %llx.%llx\n", 1490 PTR_ERR(realdn), dn, in, ceph_vinop(in)); 1491 return PTR_ERR(realdn); 1492 } 1493 1494 if (realdn) { 1495 doutc(cl, "dn %p (%d) spliced with %p (%d) inode %p ino %llx.%llx\n", 1496 dn, d_count(dn), realdn, d_count(realdn), 1497 d_inode(realdn), ceph_vinop(d_inode(realdn))); 1498 dput(dn); 1499 *pdn = realdn; 1500 } else { 1501 BUG_ON(!ceph_dentry(dn)); 1502 doutc(cl, "dn %p attached to %p ino %llx.%llx\n", dn, 1503 d_inode(dn), ceph_vinop(d_inode(dn))); 1504 } 1505 return 0; 1506 } 1507 1508 /* 1509 * Incorporate results into the local cache. This is either just 1510 * one inode, or a directory, dentry, and possibly linked-to inode (e.g., 1511 * after a lookup). 1512 * 1513 * A reply may contain 1514 * a directory inode along with a dentry. 1515 * and/or a target inode 1516 * 1517 * Called with snap_rwsem (read). 1518 */ 1519 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) 1520 { 1521 struct ceph_mds_session *session = req->r_session; 1522 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1523 struct inode *in = NULL; 1524 struct ceph_vino tvino, dvino; 1525 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb); 1526 struct ceph_client *cl = fsc->client; 1527 int err = 0; 1528 1529 doutc(cl, "%p is_dentry %d is_target %d\n", req, 1530 rinfo->head->is_dentry, rinfo->head->is_target); 1531 1532 if (!rinfo->head->is_target && !rinfo->head->is_dentry) { 1533 doutc(cl, "reply is empty!\n"); 1534 if (rinfo->head->result == 0 && req->r_parent) 1535 ceph_invalidate_dir_request(req); 1536 return 0; 1537 } 1538 1539 if (rinfo->head->is_dentry) { 1540 struct inode *dir = req->r_parent; 1541 1542 if (dir) { 1543 err = ceph_fill_inode(dir, NULL, &rinfo->diri, 1544 rinfo->dirfrag, session, -1, 1545 &req->r_caps_reservation); 1546 if (err < 0) 1547 goto done; 1548 } else { 1549 WARN_ON_ONCE(1); 1550 } 1551 1552 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME && 1553 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1554 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1555 bool is_nokey = false; 1556 struct qstr dname; 1557 struct dentry *dn, *parent; 1558 struct fscrypt_str oname = FSTR_INIT(NULL, 0); 1559 struct ceph_fname fname = { .dir = dir, 1560 .name = rinfo->dname, 1561 .ctext = rinfo->altname, 1562 .name_len = rinfo->dname_len, 1563 .ctext_len = rinfo->altname_len }; 1564 1565 BUG_ON(!rinfo->head->is_target); 1566 BUG_ON(req->r_dentry); 1567 1568 parent = d_find_any_alias(dir); 1569 BUG_ON(!parent); 1570 1571 err = ceph_fname_alloc_buffer(dir, &oname); 1572 if (err < 0) { 1573 dput(parent); 1574 goto done; 1575 } 1576 1577 err = ceph_fname_to_usr(&fname, NULL, &oname, &is_nokey); 1578 if (err < 0) { 1579 dput(parent); 1580 ceph_fname_free_buffer(dir, &oname); 1581 goto done; 1582 } 1583 dname.name = oname.name; 1584 dname.len = oname.len; 1585 dname.hash = full_name_hash(parent, dname.name, dname.len); 1586 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1587 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1588 retry_lookup: 1589 dn = d_lookup(parent, &dname); 1590 doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n", 1591 parent, dname.len, dname.name, dn); 1592 1593 if (!dn) { 1594 dn = d_alloc(parent, &dname); 1595 doutc(cl, "d_alloc %p '%.*s' = %p\n", parent, 1596 dname.len, dname.name, dn); 1597 if (!dn) { 1598 dput(parent); 1599 ceph_fname_free_buffer(dir, &oname); 1600 err = -ENOMEM; 1601 goto done; 1602 } 1603 if (is_nokey) { 1604 spin_lock(&dn->d_lock); 1605 dn->d_flags |= DCACHE_NOKEY_NAME; 1606 spin_unlock(&dn->d_lock); 1607 } 1608 err = 0; 1609 } else if (d_really_is_positive(dn) && 1610 (ceph_ino(d_inode(dn)) != tvino.ino || 1611 ceph_snap(d_inode(dn)) != tvino.snap)) { 1612 doutc(cl, " dn %p points to wrong inode %p\n", 1613 dn, d_inode(dn)); 1614 ceph_dir_clear_ordered(dir); 1615 d_delete(dn); 1616 dput(dn); 1617 goto retry_lookup; 1618 } 1619 ceph_fname_free_buffer(dir, &oname); 1620 1621 req->r_dentry = dn; 1622 dput(parent); 1623 } 1624 } 1625 1626 if (rinfo->head->is_target) { 1627 /* Should be filled in by handle_reply */ 1628 BUG_ON(!req->r_target_inode); 1629 1630 in = req->r_target_inode; 1631 err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti, 1632 NULL, session, 1633 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1634 !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) && 1635 rinfo->head->result == 0) ? req->r_fmode : -1, 1636 &req->r_caps_reservation); 1637 if (err < 0) { 1638 pr_err_client(cl, "badness %p %llx.%llx\n", in, 1639 ceph_vinop(in)); 1640 req->r_target_inode = NULL; 1641 if (in->i_state & I_NEW) 1642 discard_new_inode(in); 1643 else 1644 iput(in); 1645 goto done; 1646 } 1647 if (in->i_state & I_NEW) 1648 unlock_new_inode(in); 1649 } 1650 1651 /* 1652 * ignore null lease/binding on snapdir ENOENT, or else we 1653 * will have trouble splicing in the virtual snapdir later 1654 */ 1655 if (rinfo->head->is_dentry && 1656 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1657 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1658 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, 1659 fsc->mount_options->snapdir_name, 1660 req->r_dentry->d_name.len))) { 1661 /* 1662 * lookup link rename : null -> possibly existing inode 1663 * mknod symlink mkdir : null -> new inode 1664 * unlink : linked -> null 1665 */ 1666 struct inode *dir = req->r_parent; 1667 struct dentry *dn = req->r_dentry; 1668 bool have_dir_cap, have_lease; 1669 1670 BUG_ON(!dn); 1671 BUG_ON(!dir); 1672 BUG_ON(d_inode(dn->d_parent) != dir); 1673 1674 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1675 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1676 1677 BUG_ON(ceph_ino(dir) != dvino.ino); 1678 BUG_ON(ceph_snap(dir) != dvino.snap); 1679 1680 /* do we have a lease on the whole dir? */ 1681 have_dir_cap = 1682 (le32_to_cpu(rinfo->diri.in->cap.caps) & 1683 CEPH_CAP_FILE_SHARED); 1684 1685 /* do we have a dn lease? */ 1686 have_lease = have_dir_cap || 1687 le32_to_cpu(rinfo->dlease->duration_ms); 1688 if (!have_lease) 1689 doutc(cl, "no dentry lease or dir cap\n"); 1690 1691 /* rename? */ 1692 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { 1693 struct inode *olddir = req->r_old_dentry_dir; 1694 BUG_ON(!olddir); 1695 1696 doutc(cl, " src %p '%pd' dst %p '%pd'\n", 1697 req->r_old_dentry, req->r_old_dentry, dn, dn); 1698 doutc(cl, "doing d_move %p -> %p\n", req->r_old_dentry, dn); 1699 1700 /* d_move screws up sibling dentries' offsets */ 1701 ceph_dir_clear_ordered(dir); 1702 ceph_dir_clear_ordered(olddir); 1703 1704 d_move(req->r_old_dentry, dn); 1705 doutc(cl, " src %p '%pd' dst %p '%pd'\n", 1706 req->r_old_dentry, req->r_old_dentry, dn, dn); 1707 1708 /* ensure target dentry is invalidated, despite 1709 rehashing bug in vfs_rename_dir */ 1710 ceph_invalidate_dentry_lease(dn); 1711 1712 doutc(cl, "dn %p gets new offset %lld\n", 1713 req->r_old_dentry, 1714 ceph_dentry(req->r_old_dentry)->offset); 1715 1716 /* swap r_dentry and r_old_dentry in case that 1717 * splice_dentry() gets called later. This is safe 1718 * because no other place will use them */ 1719 req->r_dentry = req->r_old_dentry; 1720 req->r_old_dentry = dn; 1721 dn = req->r_dentry; 1722 } 1723 1724 /* null dentry? */ 1725 if (!rinfo->head->is_target) { 1726 doutc(cl, "null dentry\n"); 1727 if (d_really_is_positive(dn)) { 1728 doutc(cl, "d_delete %p\n", dn); 1729 ceph_dir_clear_ordered(dir); 1730 d_delete(dn); 1731 } else if (have_lease) { 1732 if (d_unhashed(dn)) 1733 d_add(dn, NULL); 1734 } 1735 1736 if (!d_unhashed(dn) && have_lease) 1737 update_dentry_lease(dir, dn, 1738 rinfo->dlease, session, 1739 req->r_request_started); 1740 goto done; 1741 } 1742 1743 /* attach proper inode */ 1744 if (d_really_is_negative(dn)) { 1745 ceph_dir_clear_ordered(dir); 1746 ihold(in); 1747 err = splice_dentry(&req->r_dentry, in); 1748 if (err < 0) 1749 goto done; 1750 dn = req->r_dentry; /* may have spliced */ 1751 } else if (d_really_is_positive(dn) && d_inode(dn) != in) { 1752 doutc(cl, " %p links to %p %llx.%llx, not %llx.%llx\n", 1753 dn, d_inode(dn), ceph_vinop(d_inode(dn)), 1754 ceph_vinop(in)); 1755 d_invalidate(dn); 1756 have_lease = false; 1757 } 1758 1759 if (have_lease) { 1760 update_dentry_lease(dir, dn, 1761 rinfo->dlease, session, 1762 req->r_request_started); 1763 } 1764 doutc(cl, " final dn %p\n", dn); 1765 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || 1766 req->r_op == CEPH_MDS_OP_MKSNAP) && 1767 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1768 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1769 struct inode *dir = req->r_parent; 1770 1771 /* fill out a snapdir LOOKUPSNAP dentry */ 1772 BUG_ON(!dir); 1773 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); 1774 BUG_ON(!req->r_dentry); 1775 doutc(cl, " linking snapped dir %p to dn %p\n", in, 1776 req->r_dentry); 1777 ceph_dir_clear_ordered(dir); 1778 ihold(in); 1779 err = splice_dentry(&req->r_dentry, in); 1780 if (err < 0) 1781 goto done; 1782 } else if (rinfo->head->is_dentry && req->r_dentry) { 1783 /* parent inode is not locked, be carefull */ 1784 struct ceph_vino *ptvino = NULL; 1785 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1786 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1787 if (rinfo->head->is_target) { 1788 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1789 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1790 ptvino = &tvino; 1791 } 1792 update_dentry_lease_careful(req->r_dentry, rinfo->dlease, 1793 session, req->r_request_started, 1794 rinfo->dname, rinfo->dname_len, 1795 &dvino, ptvino); 1796 } 1797 done: 1798 doutc(cl, "done err=%d\n", err); 1799 return err; 1800 } 1801 1802 /* 1803 * Prepopulate our cache with readdir results, leases, etc. 1804 */ 1805 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, 1806 struct ceph_mds_session *session) 1807 { 1808 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1809 struct ceph_client *cl = session->s_mdsc->fsc->client; 1810 int i, err = 0; 1811 1812 for (i = 0; i < rinfo->dir_nr; i++) { 1813 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1814 struct ceph_vino vino; 1815 struct inode *in; 1816 int rc; 1817 1818 vino.ino = le64_to_cpu(rde->inode.in->ino); 1819 vino.snap = le64_to_cpu(rde->inode.in->snapid); 1820 1821 in = ceph_get_inode(req->r_dentry->d_sb, vino, NULL); 1822 if (IS_ERR(in)) { 1823 err = PTR_ERR(in); 1824 doutc(cl, "badness got %d\n", err); 1825 continue; 1826 } 1827 rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 1828 -1, &req->r_caps_reservation); 1829 if (rc < 0) { 1830 pr_err_client(cl, "inode badness on %p got %d\n", in, 1831 rc); 1832 err = rc; 1833 if (in->i_state & I_NEW) { 1834 ihold(in); 1835 discard_new_inode(in); 1836 } 1837 } else if (in->i_state & I_NEW) { 1838 unlock_new_inode(in); 1839 } 1840 1841 iput(in); 1842 } 1843 1844 return err; 1845 } 1846 1847 void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl) 1848 { 1849 if (ctl->page) { 1850 kunmap(ctl->page); 1851 put_page(ctl->page); 1852 ctl->page = NULL; 1853 } 1854 } 1855 1856 static int fill_readdir_cache(struct inode *dir, struct dentry *dn, 1857 struct ceph_readdir_cache_control *ctl, 1858 struct ceph_mds_request *req) 1859 { 1860 struct ceph_client *cl = ceph_inode_to_client(dir); 1861 struct ceph_inode_info *ci = ceph_inode(dir); 1862 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*); 1863 unsigned idx = ctl->index % nsize; 1864 pgoff_t pgoff = ctl->index / nsize; 1865 1866 if (!ctl->page || pgoff != page_index(ctl->page)) { 1867 ceph_readdir_cache_release(ctl); 1868 if (idx == 0) 1869 ctl->page = grab_cache_page(&dir->i_data, pgoff); 1870 else 1871 ctl->page = find_lock_page(&dir->i_data, pgoff); 1872 if (!ctl->page) { 1873 ctl->index = -1; 1874 return idx == 0 ? -ENOMEM : 0; 1875 } 1876 /* reading/filling the cache are serialized by 1877 * i_rwsem, no need to use page lock */ 1878 unlock_page(ctl->page); 1879 ctl->dentries = kmap(ctl->page); 1880 if (idx == 0) 1881 memset(ctl->dentries, 0, PAGE_SIZE); 1882 } 1883 1884 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) && 1885 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) { 1886 doutc(cl, "dn %p idx %d\n", dn, ctl->index); 1887 ctl->dentries[idx] = dn; 1888 ctl->index++; 1889 } else { 1890 doutc(cl, "disable readdir cache\n"); 1891 ctl->index = -1; 1892 } 1893 return 0; 1894 } 1895 1896 int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1897 struct ceph_mds_session *session) 1898 { 1899 struct dentry *parent = req->r_dentry; 1900 struct inode *inode = d_inode(parent); 1901 struct ceph_inode_info *ci = ceph_inode(inode); 1902 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1903 struct ceph_client *cl = session->s_mdsc->fsc->client; 1904 struct qstr dname; 1905 struct dentry *dn; 1906 struct inode *in; 1907 int err = 0, skipped = 0, ret, i; 1908 u32 frag = le32_to_cpu(req->r_args.readdir.frag); 1909 u32 last_hash = 0; 1910 u32 fpos_offset; 1911 struct ceph_readdir_cache_control cache_ctl = {}; 1912 1913 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) 1914 return readdir_prepopulate_inodes_only(req, session); 1915 1916 if (rinfo->hash_order) { 1917 if (req->r_path2) { 1918 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, 1919 req->r_path2, 1920 strlen(req->r_path2)); 1921 last_hash = ceph_frag_value(last_hash); 1922 } else if (rinfo->offset_hash) { 1923 /* mds understands offset_hash */ 1924 WARN_ON_ONCE(req->r_readdir_offset != 2); 1925 last_hash = le32_to_cpu(req->r_args.readdir.offset_hash); 1926 } 1927 } 1928 1929 if (rinfo->dir_dir && 1930 le32_to_cpu(rinfo->dir_dir->frag) != frag) { 1931 doutc(cl, "got new frag %x -> %x\n", frag, 1932 le32_to_cpu(rinfo->dir_dir->frag)); 1933 frag = le32_to_cpu(rinfo->dir_dir->frag); 1934 if (!rinfo->hash_order) 1935 req->r_readdir_offset = 2; 1936 } 1937 1938 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { 1939 doutc(cl, "%d items under SNAPDIR dn %p\n", 1940 rinfo->dir_nr, parent); 1941 } else { 1942 doutc(cl, "%d items under dn %p\n", rinfo->dir_nr, parent); 1943 if (rinfo->dir_dir) 1944 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir); 1945 1946 if (ceph_frag_is_leftmost(frag) && 1947 req->r_readdir_offset == 2 && 1948 !(rinfo->hash_order && last_hash)) { 1949 /* note dir version at start of readdir so we can 1950 * tell if any dentries get dropped */ 1951 req->r_dir_release_cnt = 1952 atomic64_read(&ci->i_release_count); 1953 req->r_dir_ordered_cnt = 1954 atomic64_read(&ci->i_ordered_count); 1955 req->r_readdir_cache_idx = 0; 1956 } 1957 } 1958 1959 cache_ctl.index = req->r_readdir_cache_idx; 1960 fpos_offset = req->r_readdir_offset; 1961 1962 /* FIXME: release caps/leases if error occurs */ 1963 for (i = 0; i < rinfo->dir_nr; i++) { 1964 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1965 struct ceph_vino tvino; 1966 1967 dname.name = rde->name; 1968 dname.len = rde->name_len; 1969 dname.hash = full_name_hash(parent, dname.name, dname.len); 1970 1971 tvino.ino = le64_to_cpu(rde->inode.in->ino); 1972 tvino.snap = le64_to_cpu(rde->inode.in->snapid); 1973 1974 if (rinfo->hash_order) { 1975 u32 hash = ceph_frag_value(rde->raw_hash); 1976 if (hash != last_hash) 1977 fpos_offset = 2; 1978 last_hash = hash; 1979 rde->offset = ceph_make_fpos(hash, fpos_offset++, true); 1980 } else { 1981 rde->offset = ceph_make_fpos(frag, fpos_offset++, false); 1982 } 1983 1984 retry_lookup: 1985 dn = d_lookup(parent, &dname); 1986 doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n", 1987 parent, dname.len, dname.name, dn); 1988 1989 if (!dn) { 1990 dn = d_alloc(parent, &dname); 1991 doutc(cl, "d_alloc %p '%.*s' = %p\n", parent, 1992 dname.len, dname.name, dn); 1993 if (!dn) { 1994 doutc(cl, "d_alloc badness\n"); 1995 err = -ENOMEM; 1996 goto out; 1997 } 1998 if (rde->is_nokey) { 1999 spin_lock(&dn->d_lock); 2000 dn->d_flags |= DCACHE_NOKEY_NAME; 2001 spin_unlock(&dn->d_lock); 2002 } 2003 } else if (d_really_is_positive(dn) && 2004 (ceph_ino(d_inode(dn)) != tvino.ino || 2005 ceph_snap(d_inode(dn)) != tvino.snap)) { 2006 struct ceph_dentry_info *di = ceph_dentry(dn); 2007 doutc(cl, " dn %p points to wrong inode %p\n", 2008 dn, d_inode(dn)); 2009 2010 spin_lock(&dn->d_lock); 2011 if (di->offset > 0 && 2012 di->lease_shared_gen == 2013 atomic_read(&ci->i_shared_gen)) { 2014 __ceph_dir_clear_ordered(ci); 2015 di->offset = 0; 2016 } 2017 spin_unlock(&dn->d_lock); 2018 2019 d_delete(dn); 2020 dput(dn); 2021 goto retry_lookup; 2022 } 2023 2024 /* inode */ 2025 if (d_really_is_positive(dn)) { 2026 in = d_inode(dn); 2027 } else { 2028 in = ceph_get_inode(parent->d_sb, tvino, NULL); 2029 if (IS_ERR(in)) { 2030 doutc(cl, "new_inode badness\n"); 2031 d_drop(dn); 2032 dput(dn); 2033 err = PTR_ERR(in); 2034 goto out; 2035 } 2036 } 2037 2038 ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 2039 -1, &req->r_caps_reservation); 2040 if (ret < 0) { 2041 pr_err_client(cl, "badness on %p %llx.%llx\n", in, 2042 ceph_vinop(in)); 2043 if (d_really_is_negative(dn)) { 2044 if (in->i_state & I_NEW) { 2045 ihold(in); 2046 discard_new_inode(in); 2047 } 2048 iput(in); 2049 } 2050 d_drop(dn); 2051 err = ret; 2052 goto next_item; 2053 } 2054 if (in->i_state & I_NEW) 2055 unlock_new_inode(in); 2056 2057 if (d_really_is_negative(dn)) { 2058 if (ceph_security_xattr_deadlock(in)) { 2059 doutc(cl, " skip splicing dn %p to inode %p" 2060 " (security xattr deadlock)\n", dn, in); 2061 iput(in); 2062 skipped++; 2063 goto next_item; 2064 } 2065 2066 err = splice_dentry(&dn, in); 2067 if (err < 0) 2068 goto next_item; 2069 } 2070 2071 ceph_dentry(dn)->offset = rde->offset; 2072 2073 update_dentry_lease(d_inode(parent), dn, 2074 rde->lease, req->r_session, 2075 req->r_request_started); 2076 2077 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) { 2078 ret = fill_readdir_cache(d_inode(parent), dn, 2079 &cache_ctl, req); 2080 if (ret < 0) 2081 err = ret; 2082 } 2083 next_item: 2084 dput(dn); 2085 } 2086 out: 2087 if (err == 0 && skipped == 0) { 2088 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags); 2089 req->r_readdir_cache_idx = cache_ctl.index; 2090 } 2091 ceph_readdir_cache_release(&cache_ctl); 2092 doutc(cl, "done\n"); 2093 return err; 2094 } 2095 2096 bool ceph_inode_set_size(struct inode *inode, loff_t size) 2097 { 2098 struct ceph_client *cl = ceph_inode_to_client(inode); 2099 struct ceph_inode_info *ci = ceph_inode(inode); 2100 bool ret; 2101 2102 spin_lock(&ci->i_ceph_lock); 2103 doutc(cl, "set_size %p %llu -> %llu\n", inode, i_size_read(inode), size); 2104 i_size_write(inode, size); 2105 ceph_fscache_update(inode); 2106 inode->i_blocks = calc_inode_blocks(size); 2107 2108 ret = __ceph_should_report_size(ci); 2109 2110 spin_unlock(&ci->i_ceph_lock); 2111 2112 return ret; 2113 } 2114 2115 void ceph_queue_inode_work(struct inode *inode, int work_bit) 2116 { 2117 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); 2118 struct ceph_client *cl = fsc->client; 2119 struct ceph_inode_info *ci = ceph_inode(inode); 2120 set_bit(work_bit, &ci->i_work_mask); 2121 2122 ihold(inode); 2123 if (queue_work(fsc->inode_wq, &ci->i_work)) { 2124 doutc(cl, "%p %llx.%llx mask=%lx\n", inode, 2125 ceph_vinop(inode), ci->i_work_mask); 2126 } else { 2127 doutc(cl, "%p %llx.%llx already queued, mask=%lx\n", 2128 inode, ceph_vinop(inode), ci->i_work_mask); 2129 iput(inode); 2130 } 2131 } 2132 2133 static void ceph_do_invalidate_pages(struct inode *inode) 2134 { 2135 struct ceph_client *cl = ceph_inode_to_client(inode); 2136 struct ceph_inode_info *ci = ceph_inode(inode); 2137 u32 orig_gen; 2138 int check = 0; 2139 2140 ceph_fscache_invalidate(inode, false); 2141 2142 mutex_lock(&ci->i_truncate_mutex); 2143 2144 if (ceph_inode_is_shutdown(inode)) { 2145 pr_warn_ratelimited_client(cl, 2146 "%p %llx.%llx is shut down\n", inode, 2147 ceph_vinop(inode)); 2148 mapping_set_error(inode->i_mapping, -EIO); 2149 truncate_pagecache(inode, 0); 2150 mutex_unlock(&ci->i_truncate_mutex); 2151 goto out; 2152 } 2153 2154 spin_lock(&ci->i_ceph_lock); 2155 doutc(cl, "%p %llx.%llx gen %d revoking %d\n", inode, 2156 ceph_vinop(inode), ci->i_rdcache_gen, ci->i_rdcache_revoking); 2157 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { 2158 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2159 check = 1; 2160 spin_unlock(&ci->i_ceph_lock); 2161 mutex_unlock(&ci->i_truncate_mutex); 2162 goto out; 2163 } 2164 orig_gen = ci->i_rdcache_gen; 2165 spin_unlock(&ci->i_ceph_lock); 2166 2167 if (invalidate_inode_pages2(inode->i_mapping) < 0) { 2168 pr_err_client(cl, "invalidate_inode_pages2 %llx.%llx failed\n", 2169 ceph_vinop(inode)); 2170 } 2171 2172 spin_lock(&ci->i_ceph_lock); 2173 if (orig_gen == ci->i_rdcache_gen && 2174 orig_gen == ci->i_rdcache_revoking) { 2175 doutc(cl, "%p %llx.%llx gen %d successful\n", inode, 2176 ceph_vinop(inode), ci->i_rdcache_gen); 2177 ci->i_rdcache_revoking--; 2178 check = 1; 2179 } else { 2180 doutc(cl, "%p %llx.%llx gen %d raced, now %d revoking %d\n", 2181 inode, ceph_vinop(inode), orig_gen, ci->i_rdcache_gen, 2182 ci->i_rdcache_revoking); 2183 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2184 check = 1; 2185 } 2186 spin_unlock(&ci->i_ceph_lock); 2187 mutex_unlock(&ci->i_truncate_mutex); 2188 out: 2189 if (check) 2190 ceph_check_caps(ci, 0); 2191 } 2192 2193 /* 2194 * Make sure any pending truncation is applied before doing anything 2195 * that may depend on it. 2196 */ 2197 void __ceph_do_pending_vmtruncate(struct inode *inode) 2198 { 2199 struct ceph_client *cl = ceph_inode_to_client(inode); 2200 struct ceph_inode_info *ci = ceph_inode(inode); 2201 u64 to; 2202 int wrbuffer_refs, finish = 0; 2203 2204 mutex_lock(&ci->i_truncate_mutex); 2205 retry: 2206 spin_lock(&ci->i_ceph_lock); 2207 if (ci->i_truncate_pending == 0) { 2208 doutc(cl, "%p %llx.%llx none pending\n", inode, 2209 ceph_vinop(inode)); 2210 spin_unlock(&ci->i_ceph_lock); 2211 mutex_unlock(&ci->i_truncate_mutex); 2212 return; 2213 } 2214 2215 /* 2216 * make sure any dirty snapped pages are flushed before we 2217 * possibly truncate them.. so write AND block! 2218 */ 2219 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { 2220 spin_unlock(&ci->i_ceph_lock); 2221 doutc(cl, "%p %llx.%llx flushing snaps first\n", inode, 2222 ceph_vinop(inode)); 2223 filemap_write_and_wait_range(&inode->i_data, 0, 2224 inode->i_sb->s_maxbytes); 2225 goto retry; 2226 } 2227 2228 /* there should be no reader or writer */ 2229 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); 2230 2231 to = ci->i_truncate_pagecache_size; 2232 wrbuffer_refs = ci->i_wrbuffer_ref; 2233 doutc(cl, "%p %llx.%llx (%d) to %lld\n", inode, ceph_vinop(inode), 2234 ci->i_truncate_pending, to); 2235 spin_unlock(&ci->i_ceph_lock); 2236 2237 ceph_fscache_resize(inode, to); 2238 truncate_pagecache(inode, to); 2239 2240 spin_lock(&ci->i_ceph_lock); 2241 if (to == ci->i_truncate_pagecache_size) { 2242 ci->i_truncate_pending = 0; 2243 finish = 1; 2244 } 2245 spin_unlock(&ci->i_ceph_lock); 2246 if (!finish) 2247 goto retry; 2248 2249 mutex_unlock(&ci->i_truncate_mutex); 2250 2251 if (wrbuffer_refs == 0) 2252 ceph_check_caps(ci, 0); 2253 2254 wake_up_all(&ci->i_cap_wq); 2255 } 2256 2257 static void ceph_inode_work(struct work_struct *work) 2258 { 2259 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 2260 i_work); 2261 struct inode *inode = &ci->netfs.inode; 2262 struct ceph_client *cl = ceph_inode_to_client(inode); 2263 2264 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) { 2265 doutc(cl, "writeback %p %llx.%llx\n", inode, ceph_vinop(inode)); 2266 filemap_fdatawrite(&inode->i_data); 2267 } 2268 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask)) 2269 ceph_do_invalidate_pages(inode); 2270 2271 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask)) 2272 __ceph_do_pending_vmtruncate(inode); 2273 2274 if (test_and_clear_bit(CEPH_I_WORK_CHECK_CAPS, &ci->i_work_mask)) 2275 ceph_check_caps(ci, 0); 2276 2277 if (test_and_clear_bit(CEPH_I_WORK_FLUSH_SNAPS, &ci->i_work_mask)) 2278 ceph_flush_snaps(ci, NULL); 2279 2280 iput(inode); 2281 } 2282 2283 static const char *ceph_encrypted_get_link(struct dentry *dentry, 2284 struct inode *inode, 2285 struct delayed_call *done) 2286 { 2287 struct ceph_inode_info *ci = ceph_inode(inode); 2288 2289 if (!dentry) 2290 return ERR_PTR(-ECHILD); 2291 2292 return fscrypt_get_symlink(inode, ci->i_symlink, i_size_read(inode), 2293 done); 2294 } 2295 2296 static int ceph_encrypted_symlink_getattr(struct mnt_idmap *idmap, 2297 const struct path *path, 2298 struct kstat *stat, u32 request_mask, 2299 unsigned int query_flags) 2300 { 2301 int ret; 2302 2303 ret = ceph_getattr(idmap, path, stat, request_mask, query_flags); 2304 if (ret) 2305 return ret; 2306 return fscrypt_symlink_getattr(path, stat); 2307 } 2308 2309 /* 2310 * symlinks 2311 */ 2312 static const struct inode_operations ceph_symlink_iops = { 2313 .get_link = simple_get_link, 2314 .setattr = ceph_setattr, 2315 .getattr = ceph_getattr, 2316 .listxattr = ceph_listxattr, 2317 }; 2318 2319 static const struct inode_operations ceph_encrypted_symlink_iops = { 2320 .get_link = ceph_encrypted_get_link, 2321 .setattr = ceph_setattr, 2322 .getattr = ceph_encrypted_symlink_getattr, 2323 .listxattr = ceph_listxattr, 2324 }; 2325 2326 /* 2327 * Transfer the encrypted last block to the MDS and the MDS 2328 * will help update it when truncating a smaller size. 2329 * 2330 * We don't support a PAGE_SIZE that is smaller than the 2331 * CEPH_FSCRYPT_BLOCK_SIZE. 2332 */ 2333 static int fill_fscrypt_truncate(struct inode *inode, 2334 struct ceph_mds_request *req, 2335 struct iattr *attr) 2336 { 2337 struct ceph_client *cl = ceph_inode_to_client(inode); 2338 struct ceph_inode_info *ci = ceph_inode(inode); 2339 int boff = attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE; 2340 loff_t pos, orig_pos = round_down(attr->ia_size, 2341 CEPH_FSCRYPT_BLOCK_SIZE); 2342 u64 block = orig_pos >> CEPH_FSCRYPT_BLOCK_SHIFT; 2343 struct ceph_pagelist *pagelist = NULL; 2344 struct kvec iov = {0}; 2345 struct iov_iter iter; 2346 struct page *page = NULL; 2347 struct ceph_fscrypt_truncate_size_header header; 2348 int retry_op = 0; 2349 int len = CEPH_FSCRYPT_BLOCK_SIZE; 2350 loff_t i_size = i_size_read(inode); 2351 int got, ret, issued; 2352 u64 objver; 2353 2354 ret = __ceph_get_caps(inode, NULL, CEPH_CAP_FILE_RD, 0, -1, &got); 2355 if (ret < 0) 2356 return ret; 2357 2358 issued = __ceph_caps_issued(ci, NULL); 2359 2360 doutc(cl, "size %lld -> %lld got cap refs on %s, issued %s\n", 2361 i_size, attr->ia_size, ceph_cap_string(got), 2362 ceph_cap_string(issued)); 2363 2364 /* Try to writeback the dirty pagecaches */ 2365 if (issued & (CEPH_CAP_FILE_BUFFER)) { 2366 loff_t lend = orig_pos + CEPH_FSCRYPT_BLOCK_SHIFT - 1; 2367 2368 ret = filemap_write_and_wait_range(inode->i_mapping, 2369 orig_pos, lend); 2370 if (ret < 0) 2371 goto out; 2372 } 2373 2374 page = __page_cache_alloc(GFP_KERNEL); 2375 if (page == NULL) { 2376 ret = -ENOMEM; 2377 goto out; 2378 } 2379 2380 pagelist = ceph_pagelist_alloc(GFP_KERNEL); 2381 if (!pagelist) { 2382 ret = -ENOMEM; 2383 goto out; 2384 } 2385 2386 iov.iov_base = kmap_local_page(page); 2387 iov.iov_len = len; 2388 iov_iter_kvec(&iter, READ, &iov, 1, len); 2389 2390 pos = orig_pos; 2391 ret = __ceph_sync_read(inode, &pos, &iter, &retry_op, &objver); 2392 if (ret < 0) 2393 goto out; 2394 2395 /* Insert the header first */ 2396 header.ver = 1; 2397 header.compat = 1; 2398 header.change_attr = cpu_to_le64(inode_peek_iversion_raw(inode)); 2399 2400 /* 2401 * Always set the block_size to CEPH_FSCRYPT_BLOCK_SIZE, 2402 * because in MDS it may need this to do the truncate. 2403 */ 2404 header.block_size = cpu_to_le32(CEPH_FSCRYPT_BLOCK_SIZE); 2405 2406 /* 2407 * If we hit a hole here, we should just skip filling 2408 * the fscrypt for the request, because once the fscrypt 2409 * is enabled, the file will be split into many blocks 2410 * with the size of CEPH_FSCRYPT_BLOCK_SIZE, if there 2411 * has a hole, the hole size should be multiple of block 2412 * size. 2413 * 2414 * If the Rados object doesn't exist, it will be set to 0. 2415 */ 2416 if (!objver) { 2417 doutc(cl, "hit hole, ppos %lld < size %lld\n", pos, i_size); 2418 2419 header.data_len = cpu_to_le32(8 + 8 + 4); 2420 header.file_offset = 0; 2421 ret = 0; 2422 } else { 2423 header.data_len = cpu_to_le32(8 + 8 + 4 + CEPH_FSCRYPT_BLOCK_SIZE); 2424 header.file_offset = cpu_to_le64(orig_pos); 2425 2426 doutc(cl, "encrypt block boff/bsize %d/%lu\n", boff, 2427 CEPH_FSCRYPT_BLOCK_SIZE); 2428 2429 /* truncate and zero out the extra contents for the last block */ 2430 memset(iov.iov_base + boff, 0, PAGE_SIZE - boff); 2431 2432 /* encrypt the last block */ 2433 ret = ceph_fscrypt_encrypt_block_inplace(inode, page, 2434 CEPH_FSCRYPT_BLOCK_SIZE, 2435 0, block, 2436 GFP_KERNEL); 2437 if (ret) 2438 goto out; 2439 } 2440 2441 /* Insert the header */ 2442 ret = ceph_pagelist_append(pagelist, &header, sizeof(header)); 2443 if (ret) 2444 goto out; 2445 2446 if (header.block_size) { 2447 /* Append the last block contents to pagelist */ 2448 ret = ceph_pagelist_append(pagelist, iov.iov_base, 2449 CEPH_FSCRYPT_BLOCK_SIZE); 2450 if (ret) 2451 goto out; 2452 } 2453 req->r_pagelist = pagelist; 2454 out: 2455 doutc(cl, "%p %llx.%llx size dropping cap refs on %s\n", inode, 2456 ceph_vinop(inode), ceph_cap_string(got)); 2457 ceph_put_cap_refs(ci, got); 2458 if (iov.iov_base) 2459 kunmap_local(iov.iov_base); 2460 if (page) 2461 __free_pages(page, 0); 2462 if (ret && pagelist) 2463 ceph_pagelist_release(pagelist); 2464 return ret; 2465 } 2466 2467 int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode, 2468 struct iattr *attr, struct ceph_iattr *cia) 2469 { 2470 struct ceph_inode_info *ci = ceph_inode(inode); 2471 unsigned int ia_valid = attr->ia_valid; 2472 struct ceph_mds_request *req; 2473 struct ceph_mds_client *mdsc = ceph_sb_to_fs_client(inode->i_sb)->mdsc; 2474 struct ceph_client *cl = ceph_inode_to_client(inode); 2475 struct ceph_cap_flush *prealloc_cf; 2476 loff_t isize = i_size_read(inode); 2477 int issued; 2478 int release = 0, dirtied = 0; 2479 int mask = 0; 2480 int err = 0; 2481 int inode_dirty_flags = 0; 2482 bool lock_snap_rwsem = false; 2483 bool fill_fscrypt; 2484 int truncate_retry = 20; /* The RMW will take around 50ms */ 2485 struct dentry *dentry; 2486 char *path; 2487 int pathlen; 2488 u64 pathbase; 2489 bool do_sync = false; 2490 2491 dentry = d_find_alias(inode); 2492 if (!dentry) { 2493 do_sync = true; 2494 } else { 2495 path = ceph_mdsc_build_path(mdsc, dentry, &pathlen, &pathbase, 0); 2496 if (IS_ERR(path)) { 2497 do_sync = true; 2498 err = 0; 2499 } else { 2500 err = ceph_mds_check_access(mdsc, path, MAY_WRITE); 2501 } 2502 ceph_mdsc_free_path(path, pathlen); 2503 dput(dentry); 2504 2505 /* For none EACCES cases will let the MDS do the mds auth check */ 2506 if (err == -EACCES) { 2507 return err; 2508 } else if (err < 0) { 2509 do_sync = true; 2510 err = 0; 2511 } 2512 } 2513 2514 retry: 2515 prealloc_cf = ceph_alloc_cap_flush(); 2516 if (!prealloc_cf) 2517 return -ENOMEM; 2518 2519 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, 2520 USE_AUTH_MDS); 2521 if (IS_ERR(req)) { 2522 ceph_free_cap_flush(prealloc_cf); 2523 return PTR_ERR(req); 2524 } 2525 2526 fill_fscrypt = false; 2527 spin_lock(&ci->i_ceph_lock); 2528 issued = __ceph_caps_issued(ci, NULL); 2529 2530 if (!ci->i_head_snapc && 2531 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) { 2532 lock_snap_rwsem = true; 2533 if (!down_read_trylock(&mdsc->snap_rwsem)) { 2534 spin_unlock(&ci->i_ceph_lock); 2535 down_read(&mdsc->snap_rwsem); 2536 spin_lock(&ci->i_ceph_lock); 2537 issued = __ceph_caps_issued(ci, NULL); 2538 } 2539 } 2540 2541 doutc(cl, "%p %llx.%llx issued %s\n", inode, ceph_vinop(inode), 2542 ceph_cap_string(issued)); 2543 #if IS_ENABLED(CONFIG_FS_ENCRYPTION) 2544 if (cia && cia->fscrypt_auth) { 2545 u32 len = ceph_fscrypt_auth_len(cia->fscrypt_auth); 2546 2547 if (len > sizeof(*cia->fscrypt_auth)) { 2548 err = -EINVAL; 2549 spin_unlock(&ci->i_ceph_lock); 2550 goto out; 2551 } 2552 2553 doutc(cl, "%p %llx.%llx fscrypt_auth len %u to %u)\n", inode, 2554 ceph_vinop(inode), ci->fscrypt_auth_len, len); 2555 2556 /* It should never be re-set once set */ 2557 WARN_ON_ONCE(ci->fscrypt_auth); 2558 2559 if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) { 2560 dirtied |= CEPH_CAP_AUTH_EXCL; 2561 kfree(ci->fscrypt_auth); 2562 ci->fscrypt_auth = (u8 *)cia->fscrypt_auth; 2563 ci->fscrypt_auth_len = len; 2564 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2565 ci->fscrypt_auth_len != len || 2566 memcmp(ci->fscrypt_auth, cia->fscrypt_auth, len)) { 2567 req->r_fscrypt_auth = cia->fscrypt_auth; 2568 mask |= CEPH_SETATTR_FSCRYPT_AUTH; 2569 release |= CEPH_CAP_AUTH_SHARED; 2570 } 2571 cia->fscrypt_auth = NULL; 2572 } 2573 #else 2574 if (cia && cia->fscrypt_auth) { 2575 err = -EINVAL; 2576 spin_unlock(&ci->i_ceph_lock); 2577 goto out; 2578 } 2579 #endif /* CONFIG_FS_ENCRYPTION */ 2580 2581 if (ia_valid & ATTR_UID) { 2582 kuid_t fsuid = from_vfsuid(idmap, i_user_ns(inode), attr->ia_vfsuid); 2583 2584 doutc(cl, "%p %llx.%llx uid %d -> %d\n", inode, 2585 ceph_vinop(inode), 2586 from_kuid(&init_user_ns, inode->i_uid), 2587 from_kuid(&init_user_ns, attr->ia_uid)); 2588 if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) { 2589 inode->i_uid = fsuid; 2590 dirtied |= CEPH_CAP_AUTH_EXCL; 2591 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2592 !uid_eq(fsuid, inode->i_uid)) { 2593 req->r_args.setattr.uid = cpu_to_le32( 2594 from_kuid(&init_user_ns, fsuid)); 2595 mask |= CEPH_SETATTR_UID; 2596 release |= CEPH_CAP_AUTH_SHARED; 2597 } 2598 } 2599 if (ia_valid & ATTR_GID) { 2600 kgid_t fsgid = from_vfsgid(idmap, i_user_ns(inode), attr->ia_vfsgid); 2601 2602 doutc(cl, "%p %llx.%llx gid %d -> %d\n", inode, 2603 ceph_vinop(inode), 2604 from_kgid(&init_user_ns, inode->i_gid), 2605 from_kgid(&init_user_ns, attr->ia_gid)); 2606 if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) { 2607 inode->i_gid = fsgid; 2608 dirtied |= CEPH_CAP_AUTH_EXCL; 2609 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2610 !gid_eq(fsgid, inode->i_gid)) { 2611 req->r_args.setattr.gid = cpu_to_le32( 2612 from_kgid(&init_user_ns, fsgid)); 2613 mask |= CEPH_SETATTR_GID; 2614 release |= CEPH_CAP_AUTH_SHARED; 2615 } 2616 } 2617 if (ia_valid & ATTR_MODE) { 2618 doutc(cl, "%p %llx.%llx mode 0%o -> 0%o\n", inode, 2619 ceph_vinop(inode), inode->i_mode, attr->ia_mode); 2620 if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) { 2621 inode->i_mode = attr->ia_mode; 2622 dirtied |= CEPH_CAP_AUTH_EXCL; 2623 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2624 attr->ia_mode != inode->i_mode) { 2625 inode->i_mode = attr->ia_mode; 2626 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); 2627 mask |= CEPH_SETATTR_MODE; 2628 release |= CEPH_CAP_AUTH_SHARED; 2629 } 2630 } 2631 2632 if (ia_valid & ATTR_ATIME) { 2633 struct timespec64 atime = inode_get_atime(inode); 2634 2635 doutc(cl, "%p %llx.%llx atime %lld.%09ld -> %lld.%09ld\n", 2636 inode, ceph_vinop(inode), 2637 atime.tv_sec, atime.tv_nsec, 2638 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); 2639 if (!do_sync && (issued & CEPH_CAP_FILE_EXCL)) { 2640 ci->i_time_warp_seq++; 2641 inode_set_atime_to_ts(inode, attr->ia_atime); 2642 dirtied |= CEPH_CAP_FILE_EXCL; 2643 } else if (!do_sync && (issued & CEPH_CAP_FILE_WR) && 2644 timespec64_compare(&atime, 2645 &attr->ia_atime) < 0) { 2646 inode_set_atime_to_ts(inode, attr->ia_atime); 2647 dirtied |= CEPH_CAP_FILE_WR; 2648 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2649 !timespec64_equal(&atime, &attr->ia_atime)) { 2650 ceph_encode_timespec64(&req->r_args.setattr.atime, 2651 &attr->ia_atime); 2652 mask |= CEPH_SETATTR_ATIME; 2653 release |= CEPH_CAP_FILE_SHARED | 2654 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2655 } 2656 } 2657 if (ia_valid & ATTR_SIZE) { 2658 doutc(cl, "%p %llx.%llx size %lld -> %lld\n", inode, 2659 ceph_vinop(inode), isize, attr->ia_size); 2660 /* 2661 * Only when the new size is smaller and not aligned to 2662 * CEPH_FSCRYPT_BLOCK_SIZE will the RMW is needed. 2663 */ 2664 if (IS_ENCRYPTED(inode) && attr->ia_size < isize && 2665 (attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE)) { 2666 mask |= CEPH_SETATTR_SIZE; 2667 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2668 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2669 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2670 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2671 req->r_args.setattr.size = 2672 cpu_to_le64(round_up(attr->ia_size, 2673 CEPH_FSCRYPT_BLOCK_SIZE)); 2674 req->r_args.setattr.old_size = 2675 cpu_to_le64(round_up(isize, 2676 CEPH_FSCRYPT_BLOCK_SIZE)); 2677 req->r_fscrypt_file = attr->ia_size; 2678 fill_fscrypt = true; 2679 } else if (!do_sync && (issued & CEPH_CAP_FILE_EXCL) && attr->ia_size >= isize) { 2680 if (attr->ia_size > isize) { 2681 i_size_write(inode, attr->ia_size); 2682 inode->i_blocks = calc_inode_blocks(attr->ia_size); 2683 ci->i_reported_size = attr->ia_size; 2684 dirtied |= CEPH_CAP_FILE_EXCL; 2685 ia_valid |= ATTR_MTIME; 2686 } 2687 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2688 attr->ia_size != isize) { 2689 mask |= CEPH_SETATTR_SIZE; 2690 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2691 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2692 if (IS_ENCRYPTED(inode) && attr->ia_size) { 2693 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2694 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2695 req->r_args.setattr.size = 2696 cpu_to_le64(round_up(attr->ia_size, 2697 CEPH_FSCRYPT_BLOCK_SIZE)); 2698 req->r_args.setattr.old_size = 2699 cpu_to_le64(round_up(isize, 2700 CEPH_FSCRYPT_BLOCK_SIZE)); 2701 req->r_fscrypt_file = attr->ia_size; 2702 } else { 2703 req->r_args.setattr.size = cpu_to_le64(attr->ia_size); 2704 req->r_args.setattr.old_size = cpu_to_le64(isize); 2705 req->r_fscrypt_file = 0; 2706 } 2707 } 2708 } 2709 if (ia_valid & ATTR_MTIME) { 2710 struct timespec64 mtime = inode_get_mtime(inode); 2711 2712 doutc(cl, "%p %llx.%llx mtime %lld.%09ld -> %lld.%09ld\n", 2713 inode, ceph_vinop(inode), 2714 mtime.tv_sec, mtime.tv_nsec, 2715 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); 2716 if (!do_sync && (issued & CEPH_CAP_FILE_EXCL)) { 2717 ci->i_time_warp_seq++; 2718 inode_set_mtime_to_ts(inode, attr->ia_mtime); 2719 dirtied |= CEPH_CAP_FILE_EXCL; 2720 } else if (!do_sync && (issued & CEPH_CAP_FILE_WR) && 2721 timespec64_compare(&mtime, &attr->ia_mtime) < 0) { 2722 inode_set_mtime_to_ts(inode, attr->ia_mtime); 2723 dirtied |= CEPH_CAP_FILE_WR; 2724 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2725 !timespec64_equal(&mtime, &attr->ia_mtime)) { 2726 ceph_encode_timespec64(&req->r_args.setattr.mtime, 2727 &attr->ia_mtime); 2728 mask |= CEPH_SETATTR_MTIME; 2729 release |= CEPH_CAP_FILE_SHARED | 2730 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2731 } 2732 } 2733 2734 /* these do nothing */ 2735 if (ia_valid & ATTR_CTIME) { 2736 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| 2737 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; 2738 doutc(cl, "%p %llx.%llx ctime %lld.%09ld -> %lld.%09ld (%s)\n", 2739 inode, ceph_vinop(inode), 2740 inode_get_ctime_sec(inode), 2741 inode_get_ctime_nsec(inode), 2742 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, 2743 only ? "ctime only" : "ignored"); 2744 if (only) { 2745 /* 2746 * if kernel wants to dirty ctime but nothing else, 2747 * we need to choose a cap to dirty under, or do 2748 * a almost-no-op setattr 2749 */ 2750 if (issued & CEPH_CAP_AUTH_EXCL) 2751 dirtied |= CEPH_CAP_AUTH_EXCL; 2752 else if (issued & CEPH_CAP_FILE_EXCL) 2753 dirtied |= CEPH_CAP_FILE_EXCL; 2754 else if (issued & CEPH_CAP_XATTR_EXCL) 2755 dirtied |= CEPH_CAP_XATTR_EXCL; 2756 else 2757 mask |= CEPH_SETATTR_CTIME; 2758 } 2759 } 2760 if (ia_valid & ATTR_FILE) 2761 doutc(cl, "%p %llx.%llx ATTR_FILE ... hrm!\n", inode, 2762 ceph_vinop(inode)); 2763 2764 if (dirtied) { 2765 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied, 2766 &prealloc_cf); 2767 inode_set_ctime_to_ts(inode, attr->ia_ctime); 2768 inode_inc_iversion_raw(inode); 2769 } 2770 2771 release &= issued; 2772 spin_unlock(&ci->i_ceph_lock); 2773 if (lock_snap_rwsem) { 2774 up_read(&mdsc->snap_rwsem); 2775 lock_snap_rwsem = false; 2776 } 2777 2778 if (inode_dirty_flags) 2779 __mark_inode_dirty(inode, inode_dirty_flags); 2780 2781 if (mask) { 2782 req->r_inode = inode; 2783 ihold(inode); 2784 req->r_inode_drop = release; 2785 req->r_args.setattr.mask = cpu_to_le32(mask); 2786 req->r_num_caps = 1; 2787 req->r_stamp = attr->ia_ctime; 2788 if (fill_fscrypt) { 2789 err = fill_fscrypt_truncate(inode, req, attr); 2790 if (err) 2791 goto out; 2792 } 2793 2794 /* 2795 * The truncate request will return -EAGAIN when the 2796 * last block has been updated just before the MDS 2797 * successfully gets the xlock for the FILE lock. To 2798 * avoid corrupting the file contents we need to retry 2799 * it. 2800 */ 2801 err = ceph_mdsc_do_request(mdsc, NULL, req); 2802 if (err == -EAGAIN && truncate_retry--) { 2803 doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote), retry it!\n", 2804 inode, ceph_vinop(inode), err, 2805 ceph_cap_string(dirtied), mask); 2806 ceph_mdsc_put_request(req); 2807 ceph_free_cap_flush(prealloc_cf); 2808 goto retry; 2809 } 2810 } 2811 out: 2812 doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote)\n", inode, 2813 ceph_vinop(inode), err, ceph_cap_string(dirtied), mask); 2814 2815 ceph_mdsc_put_request(req); 2816 ceph_free_cap_flush(prealloc_cf); 2817 2818 if (err >= 0 && (mask & CEPH_SETATTR_SIZE)) 2819 __ceph_do_pending_vmtruncate(inode); 2820 2821 return err; 2822 } 2823 2824 /* 2825 * setattr 2826 */ 2827 int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 2828 struct iattr *attr) 2829 { 2830 struct inode *inode = d_inode(dentry); 2831 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); 2832 int err; 2833 2834 if (ceph_snap(inode) != CEPH_NOSNAP) 2835 return -EROFS; 2836 2837 if (ceph_inode_is_shutdown(inode)) 2838 return -ESTALE; 2839 2840 err = fscrypt_prepare_setattr(dentry, attr); 2841 if (err) 2842 return err; 2843 2844 err = setattr_prepare(idmap, dentry, attr); 2845 if (err != 0) 2846 return err; 2847 2848 if ((attr->ia_valid & ATTR_SIZE) && 2849 attr->ia_size > max(i_size_read(inode), fsc->max_file_size)) 2850 return -EFBIG; 2851 2852 if ((attr->ia_valid & ATTR_SIZE) && 2853 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) 2854 return -EDQUOT; 2855 2856 err = __ceph_setattr(idmap, inode, attr, NULL); 2857 2858 if (err >= 0 && (attr->ia_valid & ATTR_MODE)) 2859 err = posix_acl_chmod(idmap, dentry, attr->ia_mode); 2860 2861 return err; 2862 } 2863 2864 int ceph_try_to_choose_auth_mds(struct inode *inode, int mask) 2865 { 2866 int issued = ceph_caps_issued(ceph_inode(inode)); 2867 2868 /* 2869 * If any 'x' caps is issued we can just choose the auth MDS 2870 * instead of the random replica MDSes. Because only when the 2871 * Locker is in LOCK_EXEC state will the loner client could 2872 * get the 'x' caps. And if we send the getattr requests to 2873 * any replica MDS it must auth pin and tries to rdlock from 2874 * the auth MDS, and then the auth MDS need to do the Locker 2875 * state transition to LOCK_SYNC. And after that the lock state 2876 * will change back. 2877 * 2878 * This cost much when doing the Locker state transition and 2879 * usually will need to revoke caps from clients. 2880 * 2881 * And for the 'Xs' caps for getxattr we will also choose the 2882 * auth MDS, because the MDS side code is buggy due to setxattr 2883 * won't notify the replica MDSes when the values changed and 2884 * the replica MDS will return the old values. Though we will 2885 * fix it in MDS code, but this still makes sense for old ceph. 2886 */ 2887 if (((mask & CEPH_CAP_ANY_SHARED) && (issued & CEPH_CAP_ANY_EXCL)) 2888 || (mask & (CEPH_STAT_RSTAT | CEPH_STAT_CAP_XATTR))) 2889 return USE_AUTH_MDS; 2890 else 2891 return USE_ANY_MDS; 2892 } 2893 2894 /* 2895 * Verify that we have a lease on the given mask. If not, 2896 * do a getattr against an mds. 2897 */ 2898 int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 2899 int mask, bool force) 2900 { 2901 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb); 2902 struct ceph_client *cl = fsc->client; 2903 struct ceph_mds_client *mdsc = fsc->mdsc; 2904 struct ceph_mds_request *req; 2905 int mode; 2906 int err; 2907 2908 if (ceph_snap(inode) == CEPH_SNAPDIR) { 2909 doutc(cl, "inode %p %llx.%llx SNAPDIR\n", inode, 2910 ceph_vinop(inode)); 2911 return 0; 2912 } 2913 2914 doutc(cl, "inode %p %llx.%llx mask %s mode 0%o\n", inode, 2915 ceph_vinop(inode), ceph_cap_string(mask), inode->i_mode); 2916 if (!force && ceph_caps_issued_mask_metric(ceph_inode(inode), mask, 1)) 2917 return 0; 2918 2919 mode = ceph_try_to_choose_auth_mds(inode, mask); 2920 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode); 2921 if (IS_ERR(req)) 2922 return PTR_ERR(req); 2923 req->r_inode = inode; 2924 ihold(inode); 2925 req->r_num_caps = 1; 2926 req->r_args.getattr.mask = cpu_to_le32(mask); 2927 req->r_locked_page = locked_page; 2928 err = ceph_mdsc_do_request(mdsc, NULL, req); 2929 if (locked_page && err == 0) { 2930 u64 inline_version = req->r_reply_info.targeti.inline_version; 2931 if (inline_version == 0) { 2932 /* the reply is supposed to contain inline data */ 2933 err = -EINVAL; 2934 } else if (inline_version == CEPH_INLINE_NONE || 2935 inline_version == 1) { 2936 err = -ENODATA; 2937 } else { 2938 err = req->r_reply_info.targeti.inline_len; 2939 } 2940 } 2941 ceph_mdsc_put_request(req); 2942 doutc(cl, "result=%d\n", err); 2943 return err; 2944 } 2945 2946 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, 2947 size_t size) 2948 { 2949 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb); 2950 struct ceph_client *cl = fsc->client; 2951 struct ceph_mds_client *mdsc = fsc->mdsc; 2952 struct ceph_mds_request *req; 2953 int mode = USE_AUTH_MDS; 2954 int err; 2955 char *xattr_value; 2956 size_t xattr_value_len; 2957 2958 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETVXATTR, mode); 2959 if (IS_ERR(req)) { 2960 err = -ENOMEM; 2961 goto out; 2962 } 2963 2964 req->r_feature_needed = CEPHFS_FEATURE_OP_GETVXATTR; 2965 req->r_path2 = kstrdup(name, GFP_NOFS); 2966 if (!req->r_path2) { 2967 err = -ENOMEM; 2968 goto put; 2969 } 2970 2971 ihold(inode); 2972 req->r_inode = inode; 2973 err = ceph_mdsc_do_request(mdsc, NULL, req); 2974 if (err < 0) 2975 goto put; 2976 2977 xattr_value = req->r_reply_info.xattr_info.xattr_value; 2978 xattr_value_len = req->r_reply_info.xattr_info.xattr_value_len; 2979 2980 doutc(cl, "xattr_value_len:%zu, size:%zu\n", xattr_value_len, size); 2981 2982 err = (int)xattr_value_len; 2983 if (size == 0) 2984 goto put; 2985 2986 if (xattr_value_len > size) { 2987 err = -ERANGE; 2988 goto put; 2989 } 2990 2991 memcpy(value, xattr_value, xattr_value_len); 2992 put: 2993 ceph_mdsc_put_request(req); 2994 out: 2995 doutc(cl, "result=%d\n", err); 2996 return err; 2997 } 2998 2999 3000 /* 3001 * Check inode permissions. We verify we have a valid value for 3002 * the AUTH cap, then call the generic handler. 3003 */ 3004 int ceph_permission(struct mnt_idmap *idmap, struct inode *inode, 3005 int mask) 3006 { 3007 int err; 3008 3009 if (mask & MAY_NOT_BLOCK) 3010 return -ECHILD; 3011 3012 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); 3013 3014 if (!err) 3015 err = generic_permission(idmap, inode, mask); 3016 return err; 3017 } 3018 3019 /* Craft a mask of needed caps given a set of requested statx attrs. */ 3020 static int statx_to_caps(u32 want, umode_t mode) 3021 { 3022 int mask = 0; 3023 3024 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME|STATX_CHANGE_COOKIE)) 3025 mask |= CEPH_CAP_AUTH_SHARED; 3026 3027 if (want & (STATX_NLINK|STATX_CTIME|STATX_CHANGE_COOKIE)) { 3028 /* 3029 * The link count for directories depends on inode->i_subdirs, 3030 * and that is only updated when Fs caps are held. 3031 */ 3032 if (S_ISDIR(mode)) 3033 mask |= CEPH_CAP_FILE_SHARED; 3034 else 3035 mask |= CEPH_CAP_LINK_SHARED; 3036 } 3037 3038 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|STATX_BLOCKS|STATX_CHANGE_COOKIE)) 3039 mask |= CEPH_CAP_FILE_SHARED; 3040 3041 if (want & (STATX_CTIME|STATX_CHANGE_COOKIE)) 3042 mask |= CEPH_CAP_XATTR_SHARED; 3043 3044 return mask; 3045 } 3046 3047 /* 3048 * Get all the attributes. If we have sufficient caps for the requested attrs, 3049 * then we can avoid talking to the MDS at all. 3050 */ 3051 int ceph_getattr(struct mnt_idmap *idmap, const struct path *path, 3052 struct kstat *stat, u32 request_mask, unsigned int flags) 3053 { 3054 struct inode *inode = d_inode(path->dentry); 3055 struct super_block *sb = inode->i_sb; 3056 struct ceph_inode_info *ci = ceph_inode(inode); 3057 u32 valid_mask = STATX_BASIC_STATS; 3058 int err = 0; 3059 3060 if (ceph_inode_is_shutdown(inode)) 3061 return -ESTALE; 3062 3063 /* Skip the getattr altogether if we're asked not to sync */ 3064 if ((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) { 3065 err = ceph_do_getattr(inode, 3066 statx_to_caps(request_mask, inode->i_mode), 3067 flags & AT_STATX_FORCE_SYNC); 3068 if (err) 3069 return err; 3070 } 3071 3072 generic_fillattr(idmap, request_mask, inode, stat); 3073 stat->ino = ceph_present_inode(inode); 3074 3075 /* 3076 * btime on newly-allocated inodes is 0, so if this is still set to 3077 * that, then assume that it's not valid. 3078 */ 3079 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) { 3080 stat->btime = ci->i_btime; 3081 valid_mask |= STATX_BTIME; 3082 } 3083 3084 if (request_mask & STATX_CHANGE_COOKIE) { 3085 stat->change_cookie = inode_peek_iversion_raw(inode); 3086 valid_mask |= STATX_CHANGE_COOKIE; 3087 } 3088 3089 if (ceph_snap(inode) == CEPH_NOSNAP) 3090 stat->dev = sb->s_dev; 3091 else 3092 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0; 3093 3094 if (S_ISDIR(inode->i_mode)) { 3095 if (ceph_test_mount_opt(ceph_sb_to_fs_client(sb), RBYTES)) { 3096 stat->size = ci->i_rbytes; 3097 } else if (ceph_snap(inode) == CEPH_SNAPDIR) { 3098 struct ceph_inode_info *pci; 3099 struct ceph_snap_realm *realm; 3100 struct inode *parent; 3101 3102 parent = ceph_lookup_inode(sb, ceph_ino(inode)); 3103 if (IS_ERR(parent)) 3104 return PTR_ERR(parent); 3105 3106 pci = ceph_inode(parent); 3107 spin_lock(&pci->i_ceph_lock); 3108 realm = pci->i_snap_realm; 3109 if (realm) 3110 stat->size = realm->num_snaps; 3111 else 3112 stat->size = 0; 3113 spin_unlock(&pci->i_ceph_lock); 3114 iput(parent); 3115 } else { 3116 stat->size = ci->i_files + ci->i_subdirs; 3117 } 3118 stat->blocks = 0; 3119 stat->blksize = 65536; 3120 /* 3121 * Some applications rely on the number of st_nlink 3122 * value on directories to be either 0 (if unlinked) 3123 * or 2 + number of subdirectories. 3124 */ 3125 if (stat->nlink == 1) 3126 /* '.' + '..' + subdirs */ 3127 stat->nlink = 1 + 1 + ci->i_subdirs; 3128 } 3129 3130 stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC; 3131 if (IS_ENCRYPTED(inode)) 3132 stat->attributes |= STATX_ATTR_ENCRYPTED; 3133 stat->attributes_mask |= (STATX_ATTR_CHANGE_MONOTONIC | 3134 STATX_ATTR_ENCRYPTED); 3135 3136 stat->result_mask = request_mask & valid_mask; 3137 return err; 3138 } 3139 3140 void ceph_inode_shutdown(struct inode *inode) 3141 { 3142 struct ceph_inode_info *ci = ceph_inode(inode); 3143 struct rb_node *p; 3144 int iputs = 0; 3145 bool invalidate = false; 3146 3147 spin_lock(&ci->i_ceph_lock); 3148 ci->i_ceph_flags |= CEPH_I_SHUTDOWN; 3149 p = rb_first(&ci->i_caps); 3150 while (p) { 3151 struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); 3152 3153 p = rb_next(p); 3154 iputs += ceph_purge_inode_cap(inode, cap, &invalidate); 3155 } 3156 spin_unlock(&ci->i_ceph_lock); 3157 3158 if (invalidate) 3159 ceph_queue_invalidate(inode); 3160 while (iputs--) 3161 iput(inode); 3162 } 3163