1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/ceph/ceph_debug.h> 3 4 #include <linux/module.h> 5 #include <linux/fs.h> 6 #include <linux/slab.h> 7 #include <linux/string.h> 8 #include <linux/uaccess.h> 9 #include <linux/kernel.h> 10 #include <linux/writeback.h> 11 #include <linux/vmalloc.h> 12 #include <linux/xattr.h> 13 #include <linux/posix_acl.h> 14 #include <linux/random.h> 15 #include <linux/sort.h> 16 #include <linux/iversion.h> 17 #include <linux/fscrypt.h> 18 19 #include "super.h" 20 #include "mds_client.h" 21 #include "cache.h" 22 #include "crypto.h" 23 #include <linux/ceph/decode.h> 24 25 /* 26 * Ceph inode operations 27 * 28 * Implement basic inode helpers (get, alloc) and inode ops (getattr, 29 * setattr, etc.), xattr helpers, and helpers for assimilating 30 * metadata returned by the MDS into our cache. 31 * 32 * Also define helpers for doing asynchronous writeback, invalidation, 33 * and truncation for the benefit of those who can't afford to block 34 * (typically because they are in the message handler path). 35 */ 36 37 static const struct inode_operations ceph_symlink_iops; 38 static const struct inode_operations ceph_encrypted_symlink_iops; 39 40 static void ceph_inode_work(struct work_struct *work); 41 42 /* 43 * find or create an inode, given the ceph ino number 44 */ 45 static int ceph_set_ino_cb(struct inode *inode, void *data) 46 { 47 struct ceph_inode_info *ci = ceph_inode(inode); 48 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 49 50 ci->i_vino = *(struct ceph_vino *)data; 51 inode->i_ino = ceph_vino_to_ino_t(ci->i_vino); 52 inode_set_iversion_raw(inode, 0); 53 percpu_counter_inc(&mdsc->metric.total_inodes); 54 55 return 0; 56 } 57 58 /** 59 * ceph_new_inode - allocate a new inode in advance of an expected create 60 * @dir: parent directory for new inode 61 * @dentry: dentry that may eventually point to new inode 62 * @mode: mode of new inode 63 * @as_ctx: pointer to inherited security context 64 * 65 * Allocate a new inode in advance of an operation to create a new inode. 66 * This allocates the inode and sets up the acl_sec_ctx with appropriate 67 * info for the new inode. 68 * 69 * Returns a pointer to the new inode or an ERR_PTR. 70 */ 71 struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry, 72 umode_t *mode, struct ceph_acl_sec_ctx *as_ctx) 73 { 74 int err; 75 struct inode *inode; 76 77 inode = new_inode(dir->i_sb); 78 if (!inode) 79 return ERR_PTR(-ENOMEM); 80 81 if (!S_ISLNK(*mode)) { 82 err = ceph_pre_init_acls(dir, mode, as_ctx); 83 if (err < 0) 84 goto out_err; 85 } 86 87 inode->i_state = 0; 88 inode->i_mode = *mode; 89 90 err = ceph_security_init_secctx(dentry, *mode, as_ctx); 91 if (err < 0) 92 goto out_err; 93 94 /* 95 * We'll skip setting fscrypt context for snapshots, leaving that for 96 * the handle_reply(). 97 */ 98 if (ceph_snap(dir) != CEPH_SNAPDIR) { 99 err = ceph_fscrypt_prepare_context(dir, inode, as_ctx); 100 if (err) 101 goto out_err; 102 } 103 104 return inode; 105 out_err: 106 iput(inode); 107 return ERR_PTR(err); 108 } 109 110 void ceph_as_ctx_to_req(struct ceph_mds_request *req, 111 struct ceph_acl_sec_ctx *as_ctx) 112 { 113 if (as_ctx->pagelist) { 114 req->r_pagelist = as_ctx->pagelist; 115 as_ctx->pagelist = NULL; 116 } 117 ceph_fscrypt_as_ctx_to_req(req, as_ctx); 118 } 119 120 /** 121 * ceph_get_inode - find or create/hash a new inode 122 * @sb: superblock to search and allocate in 123 * @vino: vino to search for 124 * @newino: optional new inode to insert if one isn't found (may be NULL) 125 * 126 * Search for or insert a new inode into the hash for the given vino, and 127 * return a reference to it. If new is non-NULL, its reference is consumed. 128 */ 129 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino, 130 struct inode *newino) 131 { 132 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); 133 struct ceph_client *cl = mdsc->fsc->client; 134 struct inode *inode; 135 136 if (ceph_vino_is_reserved(vino)) 137 return ERR_PTR(-EREMOTEIO); 138 139 if (newino) { 140 inode = inode_insert5(newino, (unsigned long)vino.ino, 141 ceph_ino_compare, ceph_set_ino_cb, &vino); 142 if (inode != newino) 143 iput(newino); 144 } else { 145 inode = iget5_locked(sb, (unsigned long)vino.ino, 146 ceph_ino_compare, ceph_set_ino_cb, &vino); 147 } 148 149 if (!inode) { 150 doutc(cl, "no inode found for %llx.%llx\n", vino.ino, vino.snap); 151 return ERR_PTR(-ENOMEM); 152 } 153 154 doutc(cl, "on %llx=%llx.%llx got %p new %d\n", 155 ceph_present_inode(inode), ceph_vinop(inode), inode, 156 !!(inode->i_state & I_NEW)); 157 return inode; 158 } 159 160 /* 161 * get/constuct snapdir inode for a given directory 162 */ 163 struct inode *ceph_get_snapdir(struct inode *parent) 164 { 165 struct ceph_client *cl = ceph_inode_to_client(parent); 166 struct ceph_vino vino = { 167 .ino = ceph_ino(parent), 168 .snap = CEPH_SNAPDIR, 169 }; 170 struct inode *inode = ceph_get_inode(parent->i_sb, vino, NULL); 171 struct ceph_inode_info *ci = ceph_inode(inode); 172 int ret = -ENOTDIR; 173 174 if (IS_ERR(inode)) 175 return inode; 176 177 if (!S_ISDIR(parent->i_mode)) { 178 pr_warn_once_client(cl, "bad snapdir parent type (mode=0%o)\n", 179 parent->i_mode); 180 goto err; 181 } 182 183 if (!(inode->i_state & I_NEW) && !S_ISDIR(inode->i_mode)) { 184 pr_warn_once_client(cl, "bad snapdir inode type (mode=0%o)\n", 185 inode->i_mode); 186 goto err; 187 } 188 189 inode->i_mode = parent->i_mode; 190 inode->i_uid = parent->i_uid; 191 inode->i_gid = parent->i_gid; 192 inode_set_mtime_to_ts(inode, inode_get_mtime(parent)); 193 inode_set_ctime_to_ts(inode, inode_get_ctime(parent)); 194 inode_set_atime_to_ts(inode, inode_get_atime(parent)); 195 ci->i_rbytes = 0; 196 ci->i_btime = ceph_inode(parent)->i_btime; 197 198 #ifdef CONFIG_FS_ENCRYPTION 199 /* if encrypted, just borrow fscrypt_auth from parent */ 200 if (IS_ENCRYPTED(parent)) { 201 struct ceph_inode_info *pci = ceph_inode(parent); 202 203 ci->fscrypt_auth = kmemdup(pci->fscrypt_auth, 204 pci->fscrypt_auth_len, 205 GFP_KERNEL); 206 if (ci->fscrypt_auth) { 207 inode->i_flags |= S_ENCRYPTED; 208 ci->fscrypt_auth_len = pci->fscrypt_auth_len; 209 } else { 210 doutc(cl, "Failed to alloc snapdir fscrypt_auth\n"); 211 ret = -ENOMEM; 212 goto err; 213 } 214 } 215 #endif 216 if (inode->i_state & I_NEW) { 217 inode->i_op = &ceph_snapdir_iops; 218 inode->i_fop = &ceph_snapdir_fops; 219 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ 220 unlock_new_inode(inode); 221 } 222 223 return inode; 224 err: 225 if ((inode->i_state & I_NEW)) 226 discard_new_inode(inode); 227 else 228 iput(inode); 229 return ERR_PTR(ret); 230 } 231 232 const struct inode_operations ceph_file_iops = { 233 .permission = ceph_permission, 234 .setattr = ceph_setattr, 235 .getattr = ceph_getattr, 236 .listxattr = ceph_listxattr, 237 .get_inode_acl = ceph_get_acl, 238 .set_acl = ceph_set_acl, 239 }; 240 241 242 /* 243 * We use a 'frag tree' to keep track of the MDS's directory fragments 244 * for a given inode (usually there is just a single fragment). We 245 * need to know when a child frag is delegated to a new MDS, or when 246 * it is flagged as replicated, so we can direct our requests 247 * accordingly. 248 */ 249 250 /* 251 * find/create a frag in the tree 252 */ 253 static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, 254 u32 f) 255 { 256 struct inode *inode = &ci->netfs.inode; 257 struct ceph_client *cl = ceph_inode_to_client(inode); 258 struct rb_node **p; 259 struct rb_node *parent = NULL; 260 struct ceph_inode_frag *frag; 261 int c; 262 263 p = &ci->i_fragtree.rb_node; 264 while (*p) { 265 parent = *p; 266 frag = rb_entry(parent, struct ceph_inode_frag, node); 267 c = ceph_frag_compare(f, frag->frag); 268 if (c < 0) 269 p = &(*p)->rb_left; 270 else if (c > 0) 271 p = &(*p)->rb_right; 272 else 273 return frag; 274 } 275 276 frag = kmalloc(sizeof(*frag), GFP_NOFS); 277 if (!frag) 278 return ERR_PTR(-ENOMEM); 279 280 frag->frag = f; 281 frag->split_by = 0; 282 frag->mds = -1; 283 frag->ndist = 0; 284 285 rb_link_node(&frag->node, parent, p); 286 rb_insert_color(&frag->node, &ci->i_fragtree); 287 288 doutc(cl, "added %p %llx.%llx frag %x\n", inode, ceph_vinop(inode), f); 289 return frag; 290 } 291 292 /* 293 * find a specific frag @f 294 */ 295 struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) 296 { 297 struct rb_node *n = ci->i_fragtree.rb_node; 298 299 while (n) { 300 struct ceph_inode_frag *frag = 301 rb_entry(n, struct ceph_inode_frag, node); 302 int c = ceph_frag_compare(f, frag->frag); 303 if (c < 0) 304 n = n->rb_left; 305 else if (c > 0) 306 n = n->rb_right; 307 else 308 return frag; 309 } 310 return NULL; 311 } 312 313 /* 314 * Choose frag containing the given value @v. If @pfrag is 315 * specified, copy the frag delegation info to the caller if 316 * it is present. 317 */ 318 static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 319 struct ceph_inode_frag *pfrag, int *found) 320 { 321 struct ceph_client *cl = ceph_inode_to_client(&ci->netfs.inode); 322 u32 t = ceph_frag_make(0, 0); 323 struct ceph_inode_frag *frag; 324 unsigned nway, i; 325 u32 n; 326 327 if (found) 328 *found = 0; 329 330 while (1) { 331 WARN_ON(!ceph_frag_contains_value(t, v)); 332 frag = __ceph_find_frag(ci, t); 333 if (!frag) 334 break; /* t is a leaf */ 335 if (frag->split_by == 0) { 336 if (pfrag) 337 memcpy(pfrag, frag, sizeof(*pfrag)); 338 if (found) 339 *found = 1; 340 break; 341 } 342 343 /* choose child */ 344 nway = 1 << frag->split_by; 345 doutc(cl, "frag(%x) %x splits by %d (%d ways)\n", v, t, 346 frag->split_by, nway); 347 for (i = 0; i < nway; i++) { 348 n = ceph_frag_make_child(t, frag->split_by, i); 349 if (ceph_frag_contains_value(n, v)) { 350 t = n; 351 break; 352 } 353 } 354 BUG_ON(i == nway); 355 } 356 doutc(cl, "frag(%x) = %x\n", v, t); 357 358 return t; 359 } 360 361 u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 362 struct ceph_inode_frag *pfrag, int *found) 363 { 364 u32 ret; 365 mutex_lock(&ci->i_fragtree_mutex); 366 ret = __ceph_choose_frag(ci, v, pfrag, found); 367 mutex_unlock(&ci->i_fragtree_mutex); 368 return ret; 369 } 370 371 /* 372 * Process dirfrag (delegation) info from the mds. Include leaf 373 * fragment in tree ONLY if ndist > 0. Otherwise, only 374 * branches/splits are included in i_fragtree) 375 */ 376 static int ceph_fill_dirfrag(struct inode *inode, 377 struct ceph_mds_reply_dirfrag *dirinfo) 378 { 379 struct ceph_inode_info *ci = ceph_inode(inode); 380 struct ceph_client *cl = ceph_inode_to_client(inode); 381 struct ceph_inode_frag *frag; 382 u32 id = le32_to_cpu(dirinfo->frag); 383 int mds = le32_to_cpu(dirinfo->auth); 384 int ndist = le32_to_cpu(dirinfo->ndist); 385 int diri_auth = -1; 386 int i; 387 int err = 0; 388 389 spin_lock(&ci->i_ceph_lock); 390 if (ci->i_auth_cap) 391 diri_auth = ci->i_auth_cap->mds; 392 spin_unlock(&ci->i_ceph_lock); 393 394 if (mds == -1) /* CDIR_AUTH_PARENT */ 395 mds = diri_auth; 396 397 mutex_lock(&ci->i_fragtree_mutex); 398 if (ndist == 0 && mds == diri_auth) { 399 /* no delegation info needed. */ 400 frag = __ceph_find_frag(ci, id); 401 if (!frag) 402 goto out; 403 if (frag->split_by == 0) { 404 /* tree leaf, remove */ 405 doutc(cl, "removed %p %llx.%llx frag %x (no ref)\n", 406 inode, ceph_vinop(inode), id); 407 rb_erase(&frag->node, &ci->i_fragtree); 408 kfree(frag); 409 } else { 410 /* tree branch, keep and clear */ 411 doutc(cl, "cleared %p %llx.%llx frag %x referral\n", 412 inode, ceph_vinop(inode), id); 413 frag->mds = -1; 414 frag->ndist = 0; 415 } 416 goto out; 417 } 418 419 420 /* find/add this frag to store mds delegation info */ 421 frag = __get_or_create_frag(ci, id); 422 if (IS_ERR(frag)) { 423 /* this is not the end of the world; we can continue 424 with bad/inaccurate delegation info */ 425 pr_err_client(cl, "ENOMEM on mds ref %p %llx.%llx fg %x\n", 426 inode, ceph_vinop(inode), 427 le32_to_cpu(dirinfo->frag)); 428 err = -ENOMEM; 429 goto out; 430 } 431 432 frag->mds = mds; 433 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); 434 for (i = 0; i < frag->ndist; i++) 435 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); 436 doutc(cl, "%p %llx.%llx frag %x ndist=%d\n", inode, 437 ceph_vinop(inode), frag->frag, frag->ndist); 438 439 out: 440 mutex_unlock(&ci->i_fragtree_mutex); 441 return err; 442 } 443 444 static int frag_tree_split_cmp(const void *l, const void *r) 445 { 446 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l; 447 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r; 448 return ceph_frag_compare(le32_to_cpu(ls->frag), 449 le32_to_cpu(rs->frag)); 450 } 451 452 static bool is_frag_child(u32 f, struct ceph_inode_frag *frag) 453 { 454 if (!frag) 455 return f == ceph_frag_make(0, 0); 456 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by) 457 return false; 458 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f)); 459 } 460 461 static int ceph_fill_fragtree(struct inode *inode, 462 struct ceph_frag_tree_head *fragtree, 463 struct ceph_mds_reply_dirfrag *dirinfo) 464 { 465 struct ceph_client *cl = ceph_inode_to_client(inode); 466 struct ceph_inode_info *ci = ceph_inode(inode); 467 struct ceph_inode_frag *frag, *prev_frag = NULL; 468 struct rb_node *rb_node; 469 unsigned i, split_by, nsplits; 470 u32 id; 471 bool update = false; 472 473 mutex_lock(&ci->i_fragtree_mutex); 474 nsplits = le32_to_cpu(fragtree->nsplits); 475 if (nsplits != ci->i_fragtree_nsplits) { 476 update = true; 477 } else if (nsplits) { 478 i = get_random_u32_below(nsplits); 479 id = le32_to_cpu(fragtree->splits[i].frag); 480 if (!__ceph_find_frag(ci, id)) 481 update = true; 482 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { 483 rb_node = rb_first(&ci->i_fragtree); 484 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 485 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) 486 update = true; 487 } 488 if (!update && dirinfo) { 489 id = le32_to_cpu(dirinfo->frag); 490 if (id != __ceph_choose_frag(ci, id, NULL, NULL)) 491 update = true; 492 } 493 if (!update) 494 goto out_unlock; 495 496 if (nsplits > 1) { 497 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]), 498 frag_tree_split_cmp, NULL); 499 } 500 501 doutc(cl, "%p %llx.%llx\n", inode, ceph_vinop(inode)); 502 rb_node = rb_first(&ci->i_fragtree); 503 for (i = 0; i < nsplits; i++) { 504 id = le32_to_cpu(fragtree->splits[i].frag); 505 split_by = le32_to_cpu(fragtree->splits[i].by); 506 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) { 507 pr_err_client(cl, "%p %llx.%llx invalid split %d/%u, " 508 "frag %x split by %d\n", inode, 509 ceph_vinop(inode), i, nsplits, id, split_by); 510 continue; 511 } 512 frag = NULL; 513 while (rb_node) { 514 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 515 if (ceph_frag_compare(frag->frag, id) >= 0) { 516 if (frag->frag != id) 517 frag = NULL; 518 else 519 rb_node = rb_next(rb_node); 520 break; 521 } 522 rb_node = rb_next(rb_node); 523 /* delete stale split/leaf node */ 524 if (frag->split_by > 0 || 525 !is_frag_child(frag->frag, prev_frag)) { 526 rb_erase(&frag->node, &ci->i_fragtree); 527 if (frag->split_by > 0) 528 ci->i_fragtree_nsplits--; 529 kfree(frag); 530 } 531 frag = NULL; 532 } 533 if (!frag) { 534 frag = __get_or_create_frag(ci, id); 535 if (IS_ERR(frag)) 536 continue; 537 } 538 if (frag->split_by == 0) 539 ci->i_fragtree_nsplits++; 540 frag->split_by = split_by; 541 doutc(cl, " frag %x split by %d\n", frag->frag, frag->split_by); 542 prev_frag = frag; 543 } 544 while (rb_node) { 545 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 546 rb_node = rb_next(rb_node); 547 /* delete stale split/leaf node */ 548 if (frag->split_by > 0 || 549 !is_frag_child(frag->frag, prev_frag)) { 550 rb_erase(&frag->node, &ci->i_fragtree); 551 if (frag->split_by > 0) 552 ci->i_fragtree_nsplits--; 553 kfree(frag); 554 } 555 } 556 out_unlock: 557 mutex_unlock(&ci->i_fragtree_mutex); 558 return 0; 559 } 560 561 /* 562 * initialize a newly allocated inode. 563 */ 564 struct inode *ceph_alloc_inode(struct super_block *sb) 565 { 566 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb); 567 struct ceph_inode_info *ci; 568 int i; 569 570 ci = alloc_inode_sb(sb, ceph_inode_cachep, GFP_NOFS); 571 if (!ci) 572 return NULL; 573 574 doutc(fsc->client, "%p\n", &ci->netfs.inode); 575 576 /* Set parameters for the netfs library */ 577 netfs_inode_init(&ci->netfs, &ceph_netfs_ops, false); 578 579 spin_lock_init(&ci->i_ceph_lock); 580 581 ci->i_version = 0; 582 ci->i_inline_version = 0; 583 ci->i_time_warp_seq = 0; 584 ci->i_ceph_flags = 0; 585 atomic64_set(&ci->i_ordered_count, 1); 586 atomic64_set(&ci->i_release_count, 1); 587 atomic64_set(&ci->i_complete_seq[0], 0); 588 atomic64_set(&ci->i_complete_seq[1], 0); 589 ci->i_symlink = NULL; 590 591 ci->i_max_bytes = 0; 592 ci->i_max_files = 0; 593 594 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); 595 memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout)); 596 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL); 597 598 ci->i_fragtree = RB_ROOT; 599 mutex_init(&ci->i_fragtree_mutex); 600 601 ci->i_xattrs.blob = NULL; 602 ci->i_xattrs.prealloc_blob = NULL; 603 ci->i_xattrs.dirty = false; 604 ci->i_xattrs.index = RB_ROOT; 605 ci->i_xattrs.count = 0; 606 ci->i_xattrs.names_size = 0; 607 ci->i_xattrs.vals_size = 0; 608 ci->i_xattrs.version = 0; 609 ci->i_xattrs.index_version = 0; 610 611 ci->i_caps = RB_ROOT; 612 ci->i_auth_cap = NULL; 613 ci->i_dirty_caps = 0; 614 ci->i_flushing_caps = 0; 615 INIT_LIST_HEAD(&ci->i_dirty_item); 616 INIT_LIST_HEAD(&ci->i_flushing_item); 617 ci->i_prealloc_cap_flush = NULL; 618 INIT_LIST_HEAD(&ci->i_cap_flush_list); 619 init_waitqueue_head(&ci->i_cap_wq); 620 ci->i_hold_caps_max = 0; 621 INIT_LIST_HEAD(&ci->i_cap_delay_list); 622 INIT_LIST_HEAD(&ci->i_cap_snaps); 623 ci->i_head_snapc = NULL; 624 ci->i_snap_caps = 0; 625 626 ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ; 627 for (i = 0; i < CEPH_FILE_MODE_BITS; i++) 628 ci->i_nr_by_mode[i] = 0; 629 630 mutex_init(&ci->i_truncate_mutex); 631 ci->i_truncate_seq = 0; 632 ci->i_truncate_size = 0; 633 ci->i_truncate_pending = 0; 634 ci->i_truncate_pagecache_size = 0; 635 636 ci->i_max_size = 0; 637 ci->i_reported_size = 0; 638 ci->i_wanted_max_size = 0; 639 ci->i_requested_max_size = 0; 640 641 ci->i_pin_ref = 0; 642 ci->i_rd_ref = 0; 643 ci->i_rdcache_ref = 0; 644 ci->i_wr_ref = 0; 645 ci->i_wb_ref = 0; 646 ci->i_fx_ref = 0; 647 ci->i_wrbuffer_ref = 0; 648 ci->i_wrbuffer_ref_head = 0; 649 atomic_set(&ci->i_filelock_ref, 0); 650 atomic_set(&ci->i_shared_gen, 1); 651 ci->i_rdcache_gen = 0; 652 ci->i_rdcache_revoking = 0; 653 654 INIT_LIST_HEAD(&ci->i_unsafe_dirops); 655 INIT_LIST_HEAD(&ci->i_unsafe_iops); 656 spin_lock_init(&ci->i_unsafe_lock); 657 658 ci->i_snap_realm = NULL; 659 INIT_LIST_HEAD(&ci->i_snap_realm_item); 660 INIT_LIST_HEAD(&ci->i_snap_flush_item); 661 662 INIT_WORK(&ci->i_work, ceph_inode_work); 663 ci->i_work_mask = 0; 664 memset(&ci->i_btime, '\0', sizeof(ci->i_btime)); 665 #ifdef CONFIG_FS_ENCRYPTION 666 ci->fscrypt_auth = NULL; 667 ci->fscrypt_auth_len = 0; 668 #endif 669 return &ci->netfs.inode; 670 } 671 672 void ceph_free_inode(struct inode *inode) 673 { 674 struct ceph_inode_info *ci = ceph_inode(inode); 675 676 kfree(ci->i_symlink); 677 #ifdef CONFIG_FS_ENCRYPTION 678 kfree(ci->fscrypt_auth); 679 #endif 680 fscrypt_free_inode(inode); 681 kmem_cache_free(ceph_inode_cachep, ci); 682 } 683 684 void ceph_evict_inode(struct inode *inode) 685 { 686 struct ceph_inode_info *ci = ceph_inode(inode); 687 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 688 struct ceph_client *cl = ceph_inode_to_client(inode); 689 struct ceph_inode_frag *frag; 690 struct rb_node *n; 691 692 doutc(cl, "%p ino %llx.%llx\n", inode, ceph_vinop(inode)); 693 694 percpu_counter_dec(&mdsc->metric.total_inodes); 695 696 truncate_inode_pages_final(&inode->i_data); 697 if (inode->i_state & I_PINNING_NETFS_WB) 698 ceph_fscache_unuse_cookie(inode, true); 699 clear_inode(inode); 700 701 ceph_fscache_unregister_inode_cookie(ci); 702 fscrypt_put_encryption_info(inode); 703 704 __ceph_remove_caps(ci); 705 706 if (__ceph_has_quota(ci, QUOTA_GET_ANY)) 707 ceph_adjust_quota_realms_count(inode, false); 708 709 /* 710 * we may still have a snap_realm reference if there are stray 711 * caps in i_snap_caps. 712 */ 713 if (ci->i_snap_realm) { 714 if (ceph_snap(inode) == CEPH_NOSNAP) { 715 doutc(cl, " dropping residual ref to snap realm %p\n", 716 ci->i_snap_realm); 717 ceph_change_snap_realm(inode, NULL); 718 } else { 719 ceph_put_snapid_map(mdsc, ci->i_snapid_map); 720 ci->i_snap_realm = NULL; 721 } 722 } 723 724 while ((n = rb_first(&ci->i_fragtree)) != NULL) { 725 frag = rb_entry(n, struct ceph_inode_frag, node); 726 rb_erase(n, &ci->i_fragtree); 727 kfree(frag); 728 } 729 ci->i_fragtree_nsplits = 0; 730 731 __ceph_destroy_xattrs(ci); 732 if (ci->i_xattrs.blob) 733 ceph_buffer_put(ci->i_xattrs.blob); 734 if (ci->i_xattrs.prealloc_blob) 735 ceph_buffer_put(ci->i_xattrs.prealloc_blob); 736 737 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns)); 738 ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns)); 739 } 740 741 static inline blkcnt_t calc_inode_blocks(u64 size) 742 { 743 return (size + (1<<9) - 1) >> 9; 744 } 745 746 /* 747 * Helpers to fill in size, ctime, mtime, and atime. We have to be 748 * careful because either the client or MDS may have more up to date 749 * info, depending on which capabilities are held, and whether 750 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime 751 * and size are monotonically increasing, except when utimes() or 752 * truncate() increments the corresponding _seq values.) 753 */ 754 int ceph_fill_file_size(struct inode *inode, int issued, 755 u32 truncate_seq, u64 truncate_size, u64 size) 756 { 757 struct ceph_client *cl = ceph_inode_to_client(inode); 758 struct ceph_inode_info *ci = ceph_inode(inode); 759 int queue_trunc = 0; 760 loff_t isize = i_size_read(inode); 761 762 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || 763 (truncate_seq == ci->i_truncate_seq && size > isize)) { 764 doutc(cl, "size %lld -> %llu\n", isize, size); 765 if (size > 0 && S_ISDIR(inode->i_mode)) { 766 pr_err_client(cl, "non-zero size for directory\n"); 767 size = 0; 768 } 769 i_size_write(inode, size); 770 inode->i_blocks = calc_inode_blocks(size); 771 /* 772 * If we're expanding, then we should be able to just update 773 * the existing cookie. 774 */ 775 if (size > isize) 776 ceph_fscache_update(inode); 777 ci->i_reported_size = size; 778 if (truncate_seq != ci->i_truncate_seq) { 779 doutc(cl, "truncate_seq %u -> %u\n", 780 ci->i_truncate_seq, truncate_seq); 781 ci->i_truncate_seq = truncate_seq; 782 783 /* the MDS should have revoked these caps */ 784 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_RD | 785 CEPH_CAP_FILE_LAZYIO)); 786 /* 787 * If we hold relevant caps, or in the case where we're 788 * not the only client referencing this file and we 789 * don't hold those caps, then we need to check whether 790 * the file is either opened or mmaped 791 */ 792 if ((issued & (CEPH_CAP_FILE_CACHE| 793 CEPH_CAP_FILE_BUFFER)) || 794 mapping_mapped(inode->i_mapping) || 795 __ceph_is_file_opened(ci)) { 796 ci->i_truncate_pending++; 797 queue_trunc = 1; 798 } 799 } 800 } 801 802 /* 803 * It's possible that the new sizes of the two consecutive 804 * size truncations will be in the same fscrypt last block, 805 * and we need to truncate the corresponding page caches 806 * anyway. 807 */ 808 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0) { 809 doutc(cl, "truncate_size %lld -> %llu, encrypted %d\n", 810 ci->i_truncate_size, truncate_size, 811 !!IS_ENCRYPTED(inode)); 812 813 ci->i_truncate_size = truncate_size; 814 815 if (IS_ENCRYPTED(inode)) { 816 doutc(cl, "truncate_pagecache_size %lld -> %llu\n", 817 ci->i_truncate_pagecache_size, size); 818 ci->i_truncate_pagecache_size = size; 819 } else { 820 ci->i_truncate_pagecache_size = truncate_size; 821 } 822 } 823 return queue_trunc; 824 } 825 826 void ceph_fill_file_time(struct inode *inode, int issued, 827 u64 time_warp_seq, struct timespec64 *ctime, 828 struct timespec64 *mtime, struct timespec64 *atime) 829 { 830 struct ceph_client *cl = ceph_inode_to_client(inode); 831 struct ceph_inode_info *ci = ceph_inode(inode); 832 struct timespec64 ictime = inode_get_ctime(inode); 833 int warn = 0; 834 835 if (issued & (CEPH_CAP_FILE_EXCL| 836 CEPH_CAP_FILE_WR| 837 CEPH_CAP_FILE_BUFFER| 838 CEPH_CAP_AUTH_EXCL| 839 CEPH_CAP_XATTR_EXCL)) { 840 if (ci->i_version == 0 || 841 timespec64_compare(ctime, &ictime) > 0) { 842 doutc(cl, "ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n", 843 ictime.tv_sec, ictime.tv_nsec, 844 ctime->tv_sec, ctime->tv_nsec); 845 inode_set_ctime_to_ts(inode, *ctime); 846 } 847 if (ci->i_version == 0 || 848 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { 849 /* the MDS did a utimes() */ 850 doutc(cl, "mtime %lld.%09ld -> %lld.%09ld tw %d -> %d\n", 851 inode_get_mtime_sec(inode), 852 inode_get_mtime_nsec(inode), 853 mtime->tv_sec, mtime->tv_nsec, 854 ci->i_time_warp_seq, (int)time_warp_seq); 855 856 inode_set_mtime_to_ts(inode, *mtime); 857 inode_set_atime_to_ts(inode, *atime); 858 ci->i_time_warp_seq = time_warp_seq; 859 } else if (time_warp_seq == ci->i_time_warp_seq) { 860 struct timespec64 ts; 861 862 /* nobody did utimes(); take the max */ 863 ts = inode_get_mtime(inode); 864 if (timespec64_compare(mtime, &ts) > 0) { 865 doutc(cl, "mtime %lld.%09ld -> %lld.%09ld inc\n", 866 ts.tv_sec, ts.tv_nsec, 867 mtime->tv_sec, mtime->tv_nsec); 868 inode_set_mtime_to_ts(inode, *mtime); 869 } 870 ts = inode_get_atime(inode); 871 if (timespec64_compare(atime, &ts) > 0) { 872 doutc(cl, "atime %lld.%09ld -> %lld.%09ld inc\n", 873 ts.tv_sec, ts.tv_nsec, 874 atime->tv_sec, atime->tv_nsec); 875 inode_set_atime_to_ts(inode, *atime); 876 } 877 } else if (issued & CEPH_CAP_FILE_EXCL) { 878 /* we did a utimes(); ignore mds values */ 879 } else { 880 warn = 1; 881 } 882 } else { 883 /* we have no write|excl caps; whatever the MDS says is true */ 884 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { 885 inode_set_ctime_to_ts(inode, *ctime); 886 inode_set_mtime_to_ts(inode, *mtime); 887 inode_set_atime_to_ts(inode, *atime); 888 ci->i_time_warp_seq = time_warp_seq; 889 } else { 890 warn = 1; 891 } 892 } 893 if (warn) /* time_warp_seq shouldn't go backwards */ 894 doutc(cl, "%p mds time_warp_seq %llu < %u\n", inode, 895 time_warp_seq, ci->i_time_warp_seq); 896 } 897 898 #if IS_ENABLED(CONFIG_FS_ENCRYPTION) 899 static int decode_encrypted_symlink(struct ceph_mds_client *mdsc, 900 const char *encsym, 901 int enclen, u8 **decsym) 902 { 903 struct ceph_client *cl = mdsc->fsc->client; 904 int declen; 905 u8 *sym; 906 907 sym = kmalloc(enclen + 1, GFP_NOFS); 908 if (!sym) 909 return -ENOMEM; 910 911 declen = ceph_base64_decode(encsym, enclen, sym); 912 if (declen < 0) { 913 pr_err_client(cl, 914 "can't decode symlink (%d). Content: %.*s\n", 915 declen, enclen, encsym); 916 kfree(sym); 917 return -EIO; 918 } 919 sym[declen + 1] = '\0'; 920 *decsym = sym; 921 return declen; 922 } 923 #else 924 static int decode_encrypted_symlink(struct ceph_mds_client *mdsc, 925 const char *encsym, 926 int symlen, u8 **decsym) 927 { 928 return -EOPNOTSUPP; 929 } 930 #endif 931 932 /* 933 * Populate an inode based on info from mds. May be called on new or 934 * existing inodes. 935 */ 936 int ceph_fill_inode(struct inode *inode, struct page *locked_page, 937 struct ceph_mds_reply_info_in *iinfo, 938 struct ceph_mds_reply_dirfrag *dirinfo, 939 struct ceph_mds_session *session, int cap_fmode, 940 struct ceph_cap_reservation *caps_reservation) 941 { 942 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 943 struct ceph_client *cl = mdsc->fsc->client; 944 struct ceph_mds_reply_inode *info = iinfo->in; 945 struct ceph_inode_info *ci = ceph_inode(inode); 946 int issued, new_issued, info_caps; 947 struct timespec64 mtime, atime, ctime; 948 struct ceph_buffer *xattr_blob = NULL; 949 struct ceph_buffer *old_blob = NULL; 950 struct ceph_string *pool_ns = NULL; 951 struct ceph_cap *new_cap = NULL; 952 int err = 0; 953 bool wake = false; 954 bool queue_trunc = false; 955 bool new_version = false; 956 bool fill_inline = false; 957 umode_t mode = le32_to_cpu(info->mode); 958 dev_t rdev = le32_to_cpu(info->rdev); 959 960 lockdep_assert_held(&mdsc->snap_rwsem); 961 962 doutc(cl, "%p ino %llx.%llx v %llu had %llu\n", inode, ceph_vinop(inode), 963 le64_to_cpu(info->version), ci->i_version); 964 965 /* Once I_NEW is cleared, we can't change type or dev numbers */ 966 if (inode->i_state & I_NEW) { 967 inode->i_mode = mode; 968 } else { 969 if (inode_wrong_type(inode, mode)) { 970 pr_warn_once_client(cl, 971 "inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n", 972 ceph_vinop(inode), inode->i_mode, mode); 973 return -ESTALE; 974 } 975 976 if ((S_ISCHR(mode) || S_ISBLK(mode)) && inode->i_rdev != rdev) { 977 pr_warn_once_client(cl, 978 "dev inode rdev changed! (ino %llx.%llx is %u:%u, mds says %u:%u)\n", 979 ceph_vinop(inode), MAJOR(inode->i_rdev), 980 MINOR(inode->i_rdev), MAJOR(rdev), 981 MINOR(rdev)); 982 return -ESTALE; 983 } 984 } 985 986 info_caps = le32_to_cpu(info->cap.caps); 987 988 /* prealloc new cap struct */ 989 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) { 990 new_cap = ceph_get_cap(mdsc, caps_reservation); 991 if (!new_cap) 992 return -ENOMEM; 993 } 994 995 /* 996 * prealloc xattr data, if it looks like we'll need it. only 997 * if len > 4 (meaning there are actually xattrs; the first 4 998 * bytes are the xattr count). 999 */ 1000 if (iinfo->xattr_len > 4) { 1001 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); 1002 if (!xattr_blob) 1003 pr_err_client(cl, "ENOMEM xattr blob %d bytes\n", 1004 iinfo->xattr_len); 1005 } 1006 1007 if (iinfo->pool_ns_len > 0) 1008 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data, 1009 iinfo->pool_ns_len); 1010 1011 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map) 1012 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode)); 1013 1014 spin_lock(&ci->i_ceph_lock); 1015 1016 /* 1017 * provided version will be odd if inode value is projected, 1018 * even if stable. skip the update if we have newer stable 1019 * info (ours>=theirs, e.g. due to racing mds replies), unless 1020 * we are getting projected (unstable) info (in which case the 1021 * version is odd, and we want ours>theirs). 1022 * us them 1023 * 2 2 skip 1024 * 3 2 skip 1025 * 3 3 update 1026 */ 1027 if (ci->i_version == 0 || 1028 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 1029 le64_to_cpu(info->version) > (ci->i_version & ~1))) 1030 new_version = true; 1031 1032 /* Update change_attribute */ 1033 inode_set_max_iversion_raw(inode, iinfo->change_attr); 1034 1035 __ceph_caps_issued(ci, &issued); 1036 issued |= __ceph_caps_dirty(ci); 1037 new_issued = ~issued & info_caps; 1038 1039 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files); 1040 1041 #ifdef CONFIG_FS_ENCRYPTION 1042 if (iinfo->fscrypt_auth_len && 1043 ((inode->i_state & I_NEW) || (ci->fscrypt_auth_len == 0))) { 1044 kfree(ci->fscrypt_auth); 1045 ci->fscrypt_auth_len = iinfo->fscrypt_auth_len; 1046 ci->fscrypt_auth = iinfo->fscrypt_auth; 1047 iinfo->fscrypt_auth = NULL; 1048 iinfo->fscrypt_auth_len = 0; 1049 inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED); 1050 } 1051 #endif 1052 1053 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && 1054 (issued & CEPH_CAP_AUTH_EXCL) == 0) { 1055 inode->i_mode = mode; 1056 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); 1057 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); 1058 doutc(cl, "%p %llx.%llx mode 0%o uid.gid %d.%d\n", inode, 1059 ceph_vinop(inode), inode->i_mode, 1060 from_kuid(&init_user_ns, inode->i_uid), 1061 from_kgid(&init_user_ns, inode->i_gid)); 1062 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime); 1063 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime); 1064 } 1065 1066 /* directories have fl_stripe_unit set to zero */ 1067 if (IS_ENCRYPTED(inode)) 1068 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT; 1069 else if (le32_to_cpu(info->layout.fl_stripe_unit)) 1070 inode->i_blkbits = 1071 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; 1072 else 1073 inode->i_blkbits = CEPH_BLOCK_SHIFT; 1074 1075 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && 1076 (issued & CEPH_CAP_LINK_EXCL) == 0) 1077 set_nlink(inode, le32_to_cpu(info->nlink)); 1078 1079 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { 1080 /* be careful with mtime, atime, size */ 1081 ceph_decode_timespec64(&atime, &info->atime); 1082 ceph_decode_timespec64(&mtime, &info->mtime); 1083 ceph_decode_timespec64(&ctime, &info->ctime); 1084 ceph_fill_file_time(inode, issued, 1085 le32_to_cpu(info->time_warp_seq), 1086 &ctime, &mtime, &atime); 1087 } 1088 1089 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) { 1090 ci->i_files = le64_to_cpu(info->files); 1091 ci->i_subdirs = le64_to_cpu(info->subdirs); 1092 } 1093 1094 if (new_version || 1095 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { 1096 u64 size = le64_to_cpu(info->size); 1097 s64 old_pool = ci->i_layout.pool_id; 1098 struct ceph_string *old_ns; 1099 1100 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout); 1101 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, 1102 lockdep_is_held(&ci->i_ceph_lock)); 1103 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns); 1104 1105 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns) 1106 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; 1107 1108 pool_ns = old_ns; 1109 1110 if (IS_ENCRYPTED(inode) && size && 1111 iinfo->fscrypt_file_len == sizeof(__le64)) { 1112 u64 fsize = __le64_to_cpu(*(__le64 *)iinfo->fscrypt_file); 1113 1114 if (size == round_up(fsize, CEPH_FSCRYPT_BLOCK_SIZE)) { 1115 size = fsize; 1116 } else { 1117 pr_warn_client(cl, 1118 "fscrypt size mismatch: size=%llu fscrypt_file=%llu, discarding fscrypt_file size.\n", 1119 info->size, size); 1120 } 1121 } 1122 1123 queue_trunc = ceph_fill_file_size(inode, issued, 1124 le32_to_cpu(info->truncate_seq), 1125 le64_to_cpu(info->truncate_size), 1126 size); 1127 /* only update max_size on auth cap */ 1128 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 1129 ci->i_max_size != le64_to_cpu(info->max_size)) { 1130 doutc(cl, "max_size %lld -> %llu\n", 1131 ci->i_max_size, le64_to_cpu(info->max_size)); 1132 ci->i_max_size = le64_to_cpu(info->max_size); 1133 } 1134 } 1135 1136 /* layout and rstat are not tracked by capability, update them if 1137 * the inode info is from auth mds */ 1138 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) { 1139 if (S_ISDIR(inode->i_mode)) { 1140 ci->i_dir_layout = iinfo->dir_layout; 1141 ci->i_rbytes = le64_to_cpu(info->rbytes); 1142 ci->i_rfiles = le64_to_cpu(info->rfiles); 1143 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); 1144 ci->i_dir_pin = iinfo->dir_pin; 1145 ci->i_rsnaps = iinfo->rsnaps; 1146 ceph_decode_timespec64(&ci->i_rctime, &info->rctime); 1147 } 1148 } 1149 1150 /* xattrs */ 1151 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ 1152 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && 1153 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { 1154 if (ci->i_xattrs.blob) 1155 old_blob = ci->i_xattrs.blob; 1156 ci->i_xattrs.blob = xattr_blob; 1157 if (xattr_blob) 1158 memcpy(ci->i_xattrs.blob->vec.iov_base, 1159 iinfo->xattr_data, iinfo->xattr_len); 1160 ci->i_xattrs.version = le64_to_cpu(info->xattr_version); 1161 ceph_forget_all_cached_acls(inode); 1162 ceph_security_invalidate_secctx(inode); 1163 xattr_blob = NULL; 1164 } 1165 1166 /* finally update i_version */ 1167 if (le64_to_cpu(info->version) > ci->i_version) 1168 ci->i_version = le64_to_cpu(info->version); 1169 1170 inode->i_mapping->a_ops = &ceph_aops; 1171 1172 switch (inode->i_mode & S_IFMT) { 1173 case S_IFIFO: 1174 case S_IFBLK: 1175 case S_IFCHR: 1176 case S_IFSOCK: 1177 inode->i_blkbits = PAGE_SHIFT; 1178 init_special_inode(inode, inode->i_mode, rdev); 1179 inode->i_op = &ceph_file_iops; 1180 break; 1181 case S_IFREG: 1182 inode->i_op = &ceph_file_iops; 1183 inode->i_fop = &ceph_file_fops; 1184 break; 1185 case S_IFLNK: 1186 if (!ci->i_symlink) { 1187 u32 symlen = iinfo->symlink_len; 1188 char *sym; 1189 1190 spin_unlock(&ci->i_ceph_lock); 1191 1192 if (IS_ENCRYPTED(inode)) { 1193 if (symlen != i_size_read(inode)) 1194 pr_err_client(cl, 1195 "%p %llx.%llx BAD symlink size %lld\n", 1196 inode, ceph_vinop(inode), 1197 i_size_read(inode)); 1198 1199 err = decode_encrypted_symlink(mdsc, iinfo->symlink, 1200 symlen, (u8 **)&sym); 1201 if (err < 0) { 1202 pr_err_client(cl, 1203 "decoding encrypted symlink failed: %d\n", 1204 err); 1205 goto out; 1206 } 1207 symlen = err; 1208 i_size_write(inode, symlen); 1209 inode->i_blocks = calc_inode_blocks(symlen); 1210 } else { 1211 if (symlen != i_size_read(inode)) { 1212 pr_err_client(cl, 1213 "%p %llx.%llx BAD symlink size %lld\n", 1214 inode, ceph_vinop(inode), 1215 i_size_read(inode)); 1216 i_size_write(inode, symlen); 1217 inode->i_blocks = calc_inode_blocks(symlen); 1218 } 1219 1220 err = -ENOMEM; 1221 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); 1222 if (!sym) 1223 goto out; 1224 } 1225 1226 spin_lock(&ci->i_ceph_lock); 1227 if (!ci->i_symlink) 1228 ci->i_symlink = sym; 1229 else 1230 kfree(sym); /* lost a race */ 1231 } 1232 1233 if (IS_ENCRYPTED(inode)) { 1234 /* 1235 * Encrypted symlinks need to be decrypted before we can 1236 * cache their targets in i_link. Don't touch it here. 1237 */ 1238 inode->i_op = &ceph_encrypted_symlink_iops; 1239 } else { 1240 inode->i_link = ci->i_symlink; 1241 inode->i_op = &ceph_symlink_iops; 1242 } 1243 break; 1244 case S_IFDIR: 1245 inode->i_op = &ceph_dir_iops; 1246 inode->i_fop = &ceph_dir_fops; 1247 break; 1248 default: 1249 pr_err_client(cl, "%p %llx.%llx BAD mode 0%o\n", inode, 1250 ceph_vinop(inode), inode->i_mode); 1251 } 1252 1253 /* were we issued a capability? */ 1254 if (info_caps) { 1255 if (ceph_snap(inode) == CEPH_NOSNAP) { 1256 ceph_add_cap(inode, session, 1257 le64_to_cpu(info->cap.cap_id), 1258 info_caps, 1259 le32_to_cpu(info->cap.wanted), 1260 le32_to_cpu(info->cap.seq), 1261 le32_to_cpu(info->cap.mseq), 1262 le64_to_cpu(info->cap.realm), 1263 info->cap.flags, &new_cap); 1264 1265 /* set dir completion flag? */ 1266 if (S_ISDIR(inode->i_mode) && 1267 ci->i_files == 0 && ci->i_subdirs == 0 && 1268 (info_caps & CEPH_CAP_FILE_SHARED) && 1269 (issued & CEPH_CAP_FILE_EXCL) == 0 && 1270 !__ceph_dir_is_complete(ci)) { 1271 doutc(cl, " marking %p complete (empty)\n", 1272 inode); 1273 i_size_write(inode, 0); 1274 __ceph_dir_set_complete(ci, 1275 atomic64_read(&ci->i_release_count), 1276 atomic64_read(&ci->i_ordered_count)); 1277 } 1278 1279 wake = true; 1280 } else { 1281 doutc(cl, " %p got snap_caps %s\n", inode, 1282 ceph_cap_string(info_caps)); 1283 ci->i_snap_caps |= info_caps; 1284 } 1285 } 1286 1287 if (iinfo->inline_version > 0 && 1288 iinfo->inline_version >= ci->i_inline_version) { 1289 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; 1290 ci->i_inline_version = iinfo->inline_version; 1291 if (ceph_has_inline_data(ci) && 1292 (locked_page || (info_caps & cache_caps))) 1293 fill_inline = true; 1294 } 1295 1296 if (cap_fmode >= 0) { 1297 if (!info_caps) 1298 pr_warn_client(cl, "mds issued no caps on %llx.%llx\n", 1299 ceph_vinop(inode)); 1300 __ceph_touch_fmode(ci, mdsc, cap_fmode); 1301 } 1302 1303 spin_unlock(&ci->i_ceph_lock); 1304 1305 ceph_fscache_register_inode_cookie(inode); 1306 1307 if (fill_inline) 1308 ceph_fill_inline_data(inode, locked_page, 1309 iinfo->inline_data, iinfo->inline_len); 1310 1311 if (wake) 1312 wake_up_all(&ci->i_cap_wq); 1313 1314 /* queue truncate if we saw i_size decrease */ 1315 if (queue_trunc) 1316 ceph_queue_vmtruncate(inode); 1317 1318 /* populate frag tree */ 1319 if (S_ISDIR(inode->i_mode)) 1320 ceph_fill_fragtree(inode, &info->fragtree, dirinfo); 1321 1322 /* update delegation info? */ 1323 if (dirinfo) 1324 ceph_fill_dirfrag(inode, dirinfo); 1325 1326 err = 0; 1327 out: 1328 if (new_cap) 1329 ceph_put_cap(mdsc, new_cap); 1330 ceph_buffer_put(old_blob); 1331 ceph_buffer_put(xattr_blob); 1332 ceph_put_string(pool_ns); 1333 return err; 1334 } 1335 1336 /* 1337 * caller should hold session s_mutex and dentry->d_lock. 1338 */ 1339 static void __update_dentry_lease(struct inode *dir, struct dentry *dentry, 1340 struct ceph_mds_reply_lease *lease, 1341 struct ceph_mds_session *session, 1342 unsigned long from_time, 1343 struct ceph_mds_session **old_lease_session) 1344 { 1345 struct ceph_client *cl = ceph_inode_to_client(dir); 1346 struct ceph_dentry_info *di = ceph_dentry(dentry); 1347 unsigned mask = le16_to_cpu(lease->mask); 1348 long unsigned duration = le32_to_cpu(lease->duration_ms); 1349 long unsigned ttl = from_time + (duration * HZ) / 1000; 1350 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; 1351 1352 doutc(cl, "%p duration %lu ms ttl %lu\n", dentry, duration, ttl); 1353 1354 /* only track leases on regular dentries */ 1355 if (ceph_snap(dir) != CEPH_NOSNAP) 1356 return; 1357 1358 if (mask & CEPH_LEASE_PRIMARY_LINK) 1359 di->flags |= CEPH_DENTRY_PRIMARY_LINK; 1360 else 1361 di->flags &= ~CEPH_DENTRY_PRIMARY_LINK; 1362 1363 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen); 1364 if (!(mask & CEPH_LEASE_VALID)) { 1365 __ceph_dentry_dir_lease_touch(di); 1366 return; 1367 } 1368 1369 if (di->lease_gen == atomic_read(&session->s_cap_gen) && 1370 time_before(ttl, di->time)) 1371 return; /* we already have a newer lease. */ 1372 1373 if (di->lease_session && di->lease_session != session) { 1374 *old_lease_session = di->lease_session; 1375 di->lease_session = NULL; 1376 } 1377 1378 if (!di->lease_session) 1379 di->lease_session = ceph_get_mds_session(session); 1380 di->lease_gen = atomic_read(&session->s_cap_gen); 1381 di->lease_seq = le32_to_cpu(lease->seq); 1382 di->lease_renew_after = half_ttl; 1383 di->lease_renew_from = 0; 1384 di->time = ttl; 1385 1386 __ceph_dentry_lease_touch(di); 1387 } 1388 1389 static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry, 1390 struct ceph_mds_reply_lease *lease, 1391 struct ceph_mds_session *session, 1392 unsigned long from_time) 1393 { 1394 struct ceph_mds_session *old_lease_session = NULL; 1395 spin_lock(&dentry->d_lock); 1396 __update_dentry_lease(dir, dentry, lease, session, from_time, 1397 &old_lease_session); 1398 spin_unlock(&dentry->d_lock); 1399 ceph_put_mds_session(old_lease_session); 1400 } 1401 1402 /* 1403 * update dentry lease without having parent inode locked 1404 */ 1405 static void update_dentry_lease_careful(struct dentry *dentry, 1406 struct ceph_mds_reply_lease *lease, 1407 struct ceph_mds_session *session, 1408 unsigned long from_time, 1409 char *dname, u32 dname_len, 1410 struct ceph_vino *pdvino, 1411 struct ceph_vino *ptvino) 1412 1413 { 1414 struct inode *dir; 1415 struct ceph_mds_session *old_lease_session = NULL; 1416 1417 spin_lock(&dentry->d_lock); 1418 /* make sure dentry's name matches target */ 1419 if (dentry->d_name.len != dname_len || 1420 memcmp(dentry->d_name.name, dname, dname_len)) 1421 goto out_unlock; 1422 1423 dir = d_inode(dentry->d_parent); 1424 /* make sure parent matches dvino */ 1425 if (!ceph_ino_compare(dir, pdvino)) 1426 goto out_unlock; 1427 1428 /* make sure dentry's inode matches target. NULL ptvino means that 1429 * we expect a negative dentry */ 1430 if (ptvino) { 1431 if (d_really_is_negative(dentry)) 1432 goto out_unlock; 1433 if (!ceph_ino_compare(d_inode(dentry), ptvino)) 1434 goto out_unlock; 1435 } else { 1436 if (d_really_is_positive(dentry)) 1437 goto out_unlock; 1438 } 1439 1440 __update_dentry_lease(dir, dentry, lease, session, 1441 from_time, &old_lease_session); 1442 out_unlock: 1443 spin_unlock(&dentry->d_lock); 1444 ceph_put_mds_session(old_lease_session); 1445 } 1446 1447 /* 1448 * splice a dentry to an inode. 1449 * caller must hold directory i_rwsem for this to be safe. 1450 */ 1451 static int splice_dentry(struct dentry **pdn, struct inode *in) 1452 { 1453 struct ceph_client *cl = ceph_inode_to_client(in); 1454 struct dentry *dn = *pdn; 1455 struct dentry *realdn; 1456 1457 BUG_ON(d_inode(dn)); 1458 1459 if (S_ISDIR(in->i_mode)) { 1460 /* If inode is directory, d_splice_alias() below will remove 1461 * 'realdn' from its origin parent. We need to ensure that 1462 * origin parent's readdir cache will not reference 'realdn' 1463 */ 1464 realdn = d_find_any_alias(in); 1465 if (realdn) { 1466 struct ceph_dentry_info *di = ceph_dentry(realdn); 1467 spin_lock(&realdn->d_lock); 1468 1469 realdn->d_op->d_prune(realdn); 1470 1471 di->time = jiffies; 1472 di->lease_shared_gen = 0; 1473 di->offset = 0; 1474 1475 spin_unlock(&realdn->d_lock); 1476 dput(realdn); 1477 } 1478 } 1479 1480 /* dn must be unhashed */ 1481 if (!d_unhashed(dn)) 1482 d_drop(dn); 1483 realdn = d_splice_alias(in, dn); 1484 if (IS_ERR(realdn)) { 1485 pr_err_client(cl, "error %ld %p inode %p ino %llx.%llx\n", 1486 PTR_ERR(realdn), dn, in, ceph_vinop(in)); 1487 return PTR_ERR(realdn); 1488 } 1489 1490 if (realdn) { 1491 doutc(cl, "dn %p (%d) spliced with %p (%d) inode %p ino %llx.%llx\n", 1492 dn, d_count(dn), realdn, d_count(realdn), 1493 d_inode(realdn), ceph_vinop(d_inode(realdn))); 1494 dput(dn); 1495 *pdn = realdn; 1496 } else { 1497 BUG_ON(!ceph_dentry(dn)); 1498 doutc(cl, "dn %p attached to %p ino %llx.%llx\n", dn, 1499 d_inode(dn), ceph_vinop(d_inode(dn))); 1500 } 1501 return 0; 1502 } 1503 1504 /* 1505 * Incorporate results into the local cache. This is either just 1506 * one inode, or a directory, dentry, and possibly linked-to inode (e.g., 1507 * after a lookup). 1508 * 1509 * A reply may contain 1510 * a directory inode along with a dentry. 1511 * and/or a target inode 1512 * 1513 * Called with snap_rwsem (read). 1514 */ 1515 int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) 1516 { 1517 struct ceph_mds_session *session = req->r_session; 1518 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1519 struct inode *in = NULL; 1520 struct ceph_vino tvino, dvino; 1521 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb); 1522 struct ceph_client *cl = fsc->client; 1523 int err = 0; 1524 1525 doutc(cl, "%p is_dentry %d is_target %d\n", req, 1526 rinfo->head->is_dentry, rinfo->head->is_target); 1527 1528 if (!rinfo->head->is_target && !rinfo->head->is_dentry) { 1529 doutc(cl, "reply is empty!\n"); 1530 if (rinfo->head->result == 0 && req->r_parent) 1531 ceph_invalidate_dir_request(req); 1532 return 0; 1533 } 1534 1535 if (rinfo->head->is_dentry) { 1536 struct inode *dir = req->r_parent; 1537 1538 if (dir) { 1539 err = ceph_fill_inode(dir, NULL, &rinfo->diri, 1540 rinfo->dirfrag, session, -1, 1541 &req->r_caps_reservation); 1542 if (err < 0) 1543 goto done; 1544 } else { 1545 WARN_ON_ONCE(1); 1546 } 1547 1548 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME && 1549 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1550 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1551 bool is_nokey = false; 1552 struct qstr dname; 1553 struct dentry *dn, *parent; 1554 struct fscrypt_str oname = FSTR_INIT(NULL, 0); 1555 struct ceph_fname fname = { .dir = dir, 1556 .name = rinfo->dname, 1557 .ctext = rinfo->altname, 1558 .name_len = rinfo->dname_len, 1559 .ctext_len = rinfo->altname_len }; 1560 1561 BUG_ON(!rinfo->head->is_target); 1562 BUG_ON(req->r_dentry); 1563 1564 parent = d_find_any_alias(dir); 1565 BUG_ON(!parent); 1566 1567 err = ceph_fname_alloc_buffer(dir, &oname); 1568 if (err < 0) { 1569 dput(parent); 1570 goto done; 1571 } 1572 1573 err = ceph_fname_to_usr(&fname, NULL, &oname, &is_nokey); 1574 if (err < 0) { 1575 dput(parent); 1576 ceph_fname_free_buffer(dir, &oname); 1577 goto done; 1578 } 1579 dname.name = oname.name; 1580 dname.len = oname.len; 1581 dname.hash = full_name_hash(parent, dname.name, dname.len); 1582 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1583 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1584 retry_lookup: 1585 dn = d_lookup(parent, &dname); 1586 doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n", 1587 parent, dname.len, dname.name, dn); 1588 1589 if (!dn) { 1590 dn = d_alloc(parent, &dname); 1591 doutc(cl, "d_alloc %p '%.*s' = %p\n", parent, 1592 dname.len, dname.name, dn); 1593 if (!dn) { 1594 dput(parent); 1595 ceph_fname_free_buffer(dir, &oname); 1596 err = -ENOMEM; 1597 goto done; 1598 } 1599 if (is_nokey) { 1600 spin_lock(&dn->d_lock); 1601 dn->d_flags |= DCACHE_NOKEY_NAME; 1602 spin_unlock(&dn->d_lock); 1603 } 1604 err = 0; 1605 } else if (d_really_is_positive(dn) && 1606 (ceph_ino(d_inode(dn)) != tvino.ino || 1607 ceph_snap(d_inode(dn)) != tvino.snap)) { 1608 doutc(cl, " dn %p points to wrong inode %p\n", 1609 dn, d_inode(dn)); 1610 ceph_dir_clear_ordered(dir); 1611 d_delete(dn); 1612 dput(dn); 1613 goto retry_lookup; 1614 } 1615 ceph_fname_free_buffer(dir, &oname); 1616 1617 req->r_dentry = dn; 1618 dput(parent); 1619 } 1620 } 1621 1622 if (rinfo->head->is_target) { 1623 /* Should be filled in by handle_reply */ 1624 BUG_ON(!req->r_target_inode); 1625 1626 in = req->r_target_inode; 1627 err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti, 1628 NULL, session, 1629 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1630 !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) && 1631 rinfo->head->result == 0) ? req->r_fmode : -1, 1632 &req->r_caps_reservation); 1633 if (err < 0) { 1634 pr_err_client(cl, "badness %p %llx.%llx\n", in, 1635 ceph_vinop(in)); 1636 req->r_target_inode = NULL; 1637 if (in->i_state & I_NEW) 1638 discard_new_inode(in); 1639 else 1640 iput(in); 1641 goto done; 1642 } 1643 if (in->i_state & I_NEW) 1644 unlock_new_inode(in); 1645 } 1646 1647 /* 1648 * ignore null lease/binding on snapdir ENOENT, or else we 1649 * will have trouble splicing in the virtual snapdir later 1650 */ 1651 if (rinfo->head->is_dentry && 1652 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1653 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1654 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, 1655 fsc->mount_options->snapdir_name, 1656 req->r_dentry->d_name.len))) { 1657 /* 1658 * lookup link rename : null -> possibly existing inode 1659 * mknod symlink mkdir : null -> new inode 1660 * unlink : linked -> null 1661 */ 1662 struct inode *dir = req->r_parent; 1663 struct dentry *dn = req->r_dentry; 1664 bool have_dir_cap, have_lease; 1665 1666 BUG_ON(!dn); 1667 BUG_ON(!dir); 1668 BUG_ON(d_inode(dn->d_parent) != dir); 1669 1670 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1671 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1672 1673 BUG_ON(ceph_ino(dir) != dvino.ino); 1674 BUG_ON(ceph_snap(dir) != dvino.snap); 1675 1676 /* do we have a lease on the whole dir? */ 1677 have_dir_cap = 1678 (le32_to_cpu(rinfo->diri.in->cap.caps) & 1679 CEPH_CAP_FILE_SHARED); 1680 1681 /* do we have a dn lease? */ 1682 have_lease = have_dir_cap || 1683 le32_to_cpu(rinfo->dlease->duration_ms); 1684 if (!have_lease) 1685 doutc(cl, "no dentry lease or dir cap\n"); 1686 1687 /* rename? */ 1688 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { 1689 struct inode *olddir = req->r_old_dentry_dir; 1690 BUG_ON(!olddir); 1691 1692 doutc(cl, " src %p '%pd' dst %p '%pd'\n", 1693 req->r_old_dentry, req->r_old_dentry, dn, dn); 1694 doutc(cl, "doing d_move %p -> %p\n", req->r_old_dentry, dn); 1695 1696 /* d_move screws up sibling dentries' offsets */ 1697 ceph_dir_clear_ordered(dir); 1698 ceph_dir_clear_ordered(olddir); 1699 1700 d_move(req->r_old_dentry, dn); 1701 doutc(cl, " src %p '%pd' dst %p '%pd'\n", 1702 req->r_old_dentry, req->r_old_dentry, dn, dn); 1703 1704 /* ensure target dentry is invalidated, despite 1705 rehashing bug in vfs_rename_dir */ 1706 ceph_invalidate_dentry_lease(dn); 1707 1708 doutc(cl, "dn %p gets new offset %lld\n", 1709 req->r_old_dentry, 1710 ceph_dentry(req->r_old_dentry)->offset); 1711 1712 /* swap r_dentry and r_old_dentry in case that 1713 * splice_dentry() gets called later. This is safe 1714 * because no other place will use them */ 1715 req->r_dentry = req->r_old_dentry; 1716 req->r_old_dentry = dn; 1717 dn = req->r_dentry; 1718 } 1719 1720 /* null dentry? */ 1721 if (!rinfo->head->is_target) { 1722 doutc(cl, "null dentry\n"); 1723 if (d_really_is_positive(dn)) { 1724 doutc(cl, "d_delete %p\n", dn); 1725 ceph_dir_clear_ordered(dir); 1726 d_delete(dn); 1727 } else if (have_lease) { 1728 if (d_unhashed(dn)) 1729 d_add(dn, NULL); 1730 } 1731 1732 if (!d_unhashed(dn) && have_lease) 1733 update_dentry_lease(dir, dn, 1734 rinfo->dlease, session, 1735 req->r_request_started); 1736 goto done; 1737 } 1738 1739 /* attach proper inode */ 1740 if (d_really_is_negative(dn)) { 1741 ceph_dir_clear_ordered(dir); 1742 ihold(in); 1743 err = splice_dentry(&req->r_dentry, in); 1744 if (err < 0) 1745 goto done; 1746 dn = req->r_dentry; /* may have spliced */ 1747 } else if (d_really_is_positive(dn) && d_inode(dn) != in) { 1748 doutc(cl, " %p links to %p %llx.%llx, not %llx.%llx\n", 1749 dn, d_inode(dn), ceph_vinop(d_inode(dn)), 1750 ceph_vinop(in)); 1751 d_invalidate(dn); 1752 have_lease = false; 1753 } 1754 1755 if (have_lease) { 1756 update_dentry_lease(dir, dn, 1757 rinfo->dlease, session, 1758 req->r_request_started); 1759 } 1760 doutc(cl, " final dn %p\n", dn); 1761 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || 1762 req->r_op == CEPH_MDS_OP_MKSNAP) && 1763 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1764 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1765 struct inode *dir = req->r_parent; 1766 1767 /* fill out a snapdir LOOKUPSNAP dentry */ 1768 BUG_ON(!dir); 1769 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); 1770 BUG_ON(!req->r_dentry); 1771 doutc(cl, " linking snapped dir %p to dn %p\n", in, 1772 req->r_dentry); 1773 ceph_dir_clear_ordered(dir); 1774 ihold(in); 1775 err = splice_dentry(&req->r_dentry, in); 1776 if (err < 0) 1777 goto done; 1778 } else if (rinfo->head->is_dentry && req->r_dentry) { 1779 /* parent inode is not locked, be carefull */ 1780 struct ceph_vino *ptvino = NULL; 1781 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1782 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1783 if (rinfo->head->is_target) { 1784 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1785 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1786 ptvino = &tvino; 1787 } 1788 update_dentry_lease_careful(req->r_dentry, rinfo->dlease, 1789 session, req->r_request_started, 1790 rinfo->dname, rinfo->dname_len, 1791 &dvino, ptvino); 1792 } 1793 done: 1794 doutc(cl, "done err=%d\n", err); 1795 return err; 1796 } 1797 1798 /* 1799 * Prepopulate our cache with readdir results, leases, etc. 1800 */ 1801 static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, 1802 struct ceph_mds_session *session) 1803 { 1804 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1805 struct ceph_client *cl = session->s_mdsc->fsc->client; 1806 int i, err = 0; 1807 1808 for (i = 0; i < rinfo->dir_nr; i++) { 1809 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1810 struct ceph_vino vino; 1811 struct inode *in; 1812 int rc; 1813 1814 vino.ino = le64_to_cpu(rde->inode.in->ino); 1815 vino.snap = le64_to_cpu(rde->inode.in->snapid); 1816 1817 in = ceph_get_inode(req->r_dentry->d_sb, vino, NULL); 1818 if (IS_ERR(in)) { 1819 err = PTR_ERR(in); 1820 doutc(cl, "badness got %d\n", err); 1821 continue; 1822 } 1823 rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 1824 -1, &req->r_caps_reservation); 1825 if (rc < 0) { 1826 pr_err_client(cl, "inode badness on %p got %d\n", in, 1827 rc); 1828 err = rc; 1829 if (in->i_state & I_NEW) { 1830 ihold(in); 1831 discard_new_inode(in); 1832 } 1833 } else if (in->i_state & I_NEW) { 1834 unlock_new_inode(in); 1835 } 1836 1837 iput(in); 1838 } 1839 1840 return err; 1841 } 1842 1843 void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl) 1844 { 1845 if (ctl->page) { 1846 kunmap(ctl->page); 1847 put_page(ctl->page); 1848 ctl->page = NULL; 1849 } 1850 } 1851 1852 static int fill_readdir_cache(struct inode *dir, struct dentry *dn, 1853 struct ceph_readdir_cache_control *ctl, 1854 struct ceph_mds_request *req) 1855 { 1856 struct ceph_client *cl = ceph_inode_to_client(dir); 1857 struct ceph_inode_info *ci = ceph_inode(dir); 1858 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*); 1859 unsigned idx = ctl->index % nsize; 1860 pgoff_t pgoff = ctl->index / nsize; 1861 1862 if (!ctl->page || pgoff != page_index(ctl->page)) { 1863 ceph_readdir_cache_release(ctl); 1864 if (idx == 0) 1865 ctl->page = grab_cache_page(&dir->i_data, pgoff); 1866 else 1867 ctl->page = find_lock_page(&dir->i_data, pgoff); 1868 if (!ctl->page) { 1869 ctl->index = -1; 1870 return idx == 0 ? -ENOMEM : 0; 1871 } 1872 /* reading/filling the cache are serialized by 1873 * i_rwsem, no need to use page lock */ 1874 unlock_page(ctl->page); 1875 ctl->dentries = kmap(ctl->page); 1876 if (idx == 0) 1877 memset(ctl->dentries, 0, PAGE_SIZE); 1878 } 1879 1880 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) && 1881 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) { 1882 doutc(cl, "dn %p idx %d\n", dn, ctl->index); 1883 ctl->dentries[idx] = dn; 1884 ctl->index++; 1885 } else { 1886 doutc(cl, "disable readdir cache\n"); 1887 ctl->index = -1; 1888 } 1889 return 0; 1890 } 1891 1892 int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1893 struct ceph_mds_session *session) 1894 { 1895 struct dentry *parent = req->r_dentry; 1896 struct inode *inode = d_inode(parent); 1897 struct ceph_inode_info *ci = ceph_inode(inode); 1898 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1899 struct ceph_client *cl = session->s_mdsc->fsc->client; 1900 struct qstr dname; 1901 struct dentry *dn; 1902 struct inode *in; 1903 int err = 0, skipped = 0, ret, i; 1904 u32 frag = le32_to_cpu(req->r_args.readdir.frag); 1905 u32 last_hash = 0; 1906 u32 fpos_offset; 1907 struct ceph_readdir_cache_control cache_ctl = {}; 1908 1909 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) 1910 return readdir_prepopulate_inodes_only(req, session); 1911 1912 if (rinfo->hash_order) { 1913 if (req->r_path2) { 1914 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, 1915 req->r_path2, 1916 strlen(req->r_path2)); 1917 last_hash = ceph_frag_value(last_hash); 1918 } else if (rinfo->offset_hash) { 1919 /* mds understands offset_hash */ 1920 WARN_ON_ONCE(req->r_readdir_offset != 2); 1921 last_hash = le32_to_cpu(req->r_args.readdir.offset_hash); 1922 } 1923 } 1924 1925 if (rinfo->dir_dir && 1926 le32_to_cpu(rinfo->dir_dir->frag) != frag) { 1927 doutc(cl, "got new frag %x -> %x\n", frag, 1928 le32_to_cpu(rinfo->dir_dir->frag)); 1929 frag = le32_to_cpu(rinfo->dir_dir->frag); 1930 if (!rinfo->hash_order) 1931 req->r_readdir_offset = 2; 1932 } 1933 1934 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { 1935 doutc(cl, "%d items under SNAPDIR dn %p\n", 1936 rinfo->dir_nr, parent); 1937 } else { 1938 doutc(cl, "%d items under dn %p\n", rinfo->dir_nr, parent); 1939 if (rinfo->dir_dir) 1940 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir); 1941 1942 if (ceph_frag_is_leftmost(frag) && 1943 req->r_readdir_offset == 2 && 1944 !(rinfo->hash_order && last_hash)) { 1945 /* note dir version at start of readdir so we can 1946 * tell if any dentries get dropped */ 1947 req->r_dir_release_cnt = 1948 atomic64_read(&ci->i_release_count); 1949 req->r_dir_ordered_cnt = 1950 atomic64_read(&ci->i_ordered_count); 1951 req->r_readdir_cache_idx = 0; 1952 } 1953 } 1954 1955 cache_ctl.index = req->r_readdir_cache_idx; 1956 fpos_offset = req->r_readdir_offset; 1957 1958 /* FIXME: release caps/leases if error occurs */ 1959 for (i = 0; i < rinfo->dir_nr; i++) { 1960 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1961 struct ceph_vino tvino; 1962 1963 dname.name = rde->name; 1964 dname.len = rde->name_len; 1965 dname.hash = full_name_hash(parent, dname.name, dname.len); 1966 1967 tvino.ino = le64_to_cpu(rde->inode.in->ino); 1968 tvino.snap = le64_to_cpu(rde->inode.in->snapid); 1969 1970 if (rinfo->hash_order) { 1971 u32 hash = ceph_frag_value(rde->raw_hash); 1972 if (hash != last_hash) 1973 fpos_offset = 2; 1974 last_hash = hash; 1975 rde->offset = ceph_make_fpos(hash, fpos_offset++, true); 1976 } else { 1977 rde->offset = ceph_make_fpos(frag, fpos_offset++, false); 1978 } 1979 1980 retry_lookup: 1981 dn = d_lookup(parent, &dname); 1982 doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n", 1983 parent, dname.len, dname.name, dn); 1984 1985 if (!dn) { 1986 dn = d_alloc(parent, &dname); 1987 doutc(cl, "d_alloc %p '%.*s' = %p\n", parent, 1988 dname.len, dname.name, dn); 1989 if (!dn) { 1990 doutc(cl, "d_alloc badness\n"); 1991 err = -ENOMEM; 1992 goto out; 1993 } 1994 if (rde->is_nokey) { 1995 spin_lock(&dn->d_lock); 1996 dn->d_flags |= DCACHE_NOKEY_NAME; 1997 spin_unlock(&dn->d_lock); 1998 } 1999 } else if (d_really_is_positive(dn) && 2000 (ceph_ino(d_inode(dn)) != tvino.ino || 2001 ceph_snap(d_inode(dn)) != tvino.snap)) { 2002 struct ceph_dentry_info *di = ceph_dentry(dn); 2003 doutc(cl, " dn %p points to wrong inode %p\n", 2004 dn, d_inode(dn)); 2005 2006 spin_lock(&dn->d_lock); 2007 if (di->offset > 0 && 2008 di->lease_shared_gen == 2009 atomic_read(&ci->i_shared_gen)) { 2010 __ceph_dir_clear_ordered(ci); 2011 di->offset = 0; 2012 } 2013 spin_unlock(&dn->d_lock); 2014 2015 d_delete(dn); 2016 dput(dn); 2017 goto retry_lookup; 2018 } 2019 2020 /* inode */ 2021 if (d_really_is_positive(dn)) { 2022 in = d_inode(dn); 2023 } else { 2024 in = ceph_get_inode(parent->d_sb, tvino, NULL); 2025 if (IS_ERR(in)) { 2026 doutc(cl, "new_inode badness\n"); 2027 d_drop(dn); 2028 dput(dn); 2029 err = PTR_ERR(in); 2030 goto out; 2031 } 2032 } 2033 2034 ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 2035 -1, &req->r_caps_reservation); 2036 if (ret < 0) { 2037 pr_err_client(cl, "badness on %p %llx.%llx\n", in, 2038 ceph_vinop(in)); 2039 if (d_really_is_negative(dn)) { 2040 if (in->i_state & I_NEW) { 2041 ihold(in); 2042 discard_new_inode(in); 2043 } 2044 iput(in); 2045 } 2046 d_drop(dn); 2047 err = ret; 2048 goto next_item; 2049 } 2050 if (in->i_state & I_NEW) 2051 unlock_new_inode(in); 2052 2053 if (d_really_is_negative(dn)) { 2054 if (ceph_security_xattr_deadlock(in)) { 2055 doutc(cl, " skip splicing dn %p to inode %p" 2056 " (security xattr deadlock)\n", dn, in); 2057 iput(in); 2058 skipped++; 2059 goto next_item; 2060 } 2061 2062 err = splice_dentry(&dn, in); 2063 if (err < 0) 2064 goto next_item; 2065 } 2066 2067 ceph_dentry(dn)->offset = rde->offset; 2068 2069 update_dentry_lease(d_inode(parent), dn, 2070 rde->lease, req->r_session, 2071 req->r_request_started); 2072 2073 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) { 2074 ret = fill_readdir_cache(d_inode(parent), dn, 2075 &cache_ctl, req); 2076 if (ret < 0) 2077 err = ret; 2078 } 2079 next_item: 2080 dput(dn); 2081 } 2082 out: 2083 if (err == 0 && skipped == 0) { 2084 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags); 2085 req->r_readdir_cache_idx = cache_ctl.index; 2086 } 2087 ceph_readdir_cache_release(&cache_ctl); 2088 doutc(cl, "done\n"); 2089 return err; 2090 } 2091 2092 bool ceph_inode_set_size(struct inode *inode, loff_t size) 2093 { 2094 struct ceph_client *cl = ceph_inode_to_client(inode); 2095 struct ceph_inode_info *ci = ceph_inode(inode); 2096 bool ret; 2097 2098 spin_lock(&ci->i_ceph_lock); 2099 doutc(cl, "set_size %p %llu -> %llu\n", inode, i_size_read(inode), size); 2100 i_size_write(inode, size); 2101 ceph_fscache_update(inode); 2102 inode->i_blocks = calc_inode_blocks(size); 2103 2104 ret = __ceph_should_report_size(ci); 2105 2106 spin_unlock(&ci->i_ceph_lock); 2107 2108 return ret; 2109 } 2110 2111 void ceph_queue_inode_work(struct inode *inode, int work_bit) 2112 { 2113 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); 2114 struct ceph_client *cl = fsc->client; 2115 struct ceph_inode_info *ci = ceph_inode(inode); 2116 set_bit(work_bit, &ci->i_work_mask); 2117 2118 ihold(inode); 2119 if (queue_work(fsc->inode_wq, &ci->i_work)) { 2120 doutc(cl, "%p %llx.%llx mask=%lx\n", inode, 2121 ceph_vinop(inode), ci->i_work_mask); 2122 } else { 2123 doutc(cl, "%p %llx.%llx already queued, mask=%lx\n", 2124 inode, ceph_vinop(inode), ci->i_work_mask); 2125 iput(inode); 2126 } 2127 } 2128 2129 static void ceph_do_invalidate_pages(struct inode *inode) 2130 { 2131 struct ceph_client *cl = ceph_inode_to_client(inode); 2132 struct ceph_inode_info *ci = ceph_inode(inode); 2133 u32 orig_gen; 2134 int check = 0; 2135 2136 ceph_fscache_invalidate(inode, false); 2137 2138 mutex_lock(&ci->i_truncate_mutex); 2139 2140 if (ceph_inode_is_shutdown(inode)) { 2141 pr_warn_ratelimited_client(cl, 2142 "%p %llx.%llx is shut down\n", inode, 2143 ceph_vinop(inode)); 2144 mapping_set_error(inode->i_mapping, -EIO); 2145 truncate_pagecache(inode, 0); 2146 mutex_unlock(&ci->i_truncate_mutex); 2147 goto out; 2148 } 2149 2150 spin_lock(&ci->i_ceph_lock); 2151 doutc(cl, "%p %llx.%llx gen %d revoking %d\n", inode, 2152 ceph_vinop(inode), ci->i_rdcache_gen, ci->i_rdcache_revoking); 2153 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { 2154 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2155 check = 1; 2156 spin_unlock(&ci->i_ceph_lock); 2157 mutex_unlock(&ci->i_truncate_mutex); 2158 goto out; 2159 } 2160 orig_gen = ci->i_rdcache_gen; 2161 spin_unlock(&ci->i_ceph_lock); 2162 2163 if (invalidate_inode_pages2(inode->i_mapping) < 0) { 2164 pr_err_client(cl, "invalidate_inode_pages2 %llx.%llx failed\n", 2165 ceph_vinop(inode)); 2166 } 2167 2168 spin_lock(&ci->i_ceph_lock); 2169 if (orig_gen == ci->i_rdcache_gen && 2170 orig_gen == ci->i_rdcache_revoking) { 2171 doutc(cl, "%p %llx.%llx gen %d successful\n", inode, 2172 ceph_vinop(inode), ci->i_rdcache_gen); 2173 ci->i_rdcache_revoking--; 2174 check = 1; 2175 } else { 2176 doutc(cl, "%p %llx.%llx gen %d raced, now %d revoking %d\n", 2177 inode, ceph_vinop(inode), orig_gen, ci->i_rdcache_gen, 2178 ci->i_rdcache_revoking); 2179 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2180 check = 1; 2181 } 2182 spin_unlock(&ci->i_ceph_lock); 2183 mutex_unlock(&ci->i_truncate_mutex); 2184 out: 2185 if (check) 2186 ceph_check_caps(ci, 0); 2187 } 2188 2189 /* 2190 * Make sure any pending truncation is applied before doing anything 2191 * that may depend on it. 2192 */ 2193 void __ceph_do_pending_vmtruncate(struct inode *inode) 2194 { 2195 struct ceph_client *cl = ceph_inode_to_client(inode); 2196 struct ceph_inode_info *ci = ceph_inode(inode); 2197 u64 to; 2198 int wrbuffer_refs, finish = 0; 2199 2200 mutex_lock(&ci->i_truncate_mutex); 2201 retry: 2202 spin_lock(&ci->i_ceph_lock); 2203 if (ci->i_truncate_pending == 0) { 2204 doutc(cl, "%p %llx.%llx none pending\n", inode, 2205 ceph_vinop(inode)); 2206 spin_unlock(&ci->i_ceph_lock); 2207 mutex_unlock(&ci->i_truncate_mutex); 2208 return; 2209 } 2210 2211 /* 2212 * make sure any dirty snapped pages are flushed before we 2213 * possibly truncate them.. so write AND block! 2214 */ 2215 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { 2216 spin_unlock(&ci->i_ceph_lock); 2217 doutc(cl, "%p %llx.%llx flushing snaps first\n", inode, 2218 ceph_vinop(inode)); 2219 filemap_write_and_wait_range(&inode->i_data, 0, 2220 inode->i_sb->s_maxbytes); 2221 goto retry; 2222 } 2223 2224 /* there should be no reader or writer */ 2225 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); 2226 2227 to = ci->i_truncate_pagecache_size; 2228 wrbuffer_refs = ci->i_wrbuffer_ref; 2229 doutc(cl, "%p %llx.%llx (%d) to %lld\n", inode, ceph_vinop(inode), 2230 ci->i_truncate_pending, to); 2231 spin_unlock(&ci->i_ceph_lock); 2232 2233 ceph_fscache_resize(inode, to); 2234 truncate_pagecache(inode, to); 2235 2236 spin_lock(&ci->i_ceph_lock); 2237 if (to == ci->i_truncate_pagecache_size) { 2238 ci->i_truncate_pending = 0; 2239 finish = 1; 2240 } 2241 spin_unlock(&ci->i_ceph_lock); 2242 if (!finish) 2243 goto retry; 2244 2245 mutex_unlock(&ci->i_truncate_mutex); 2246 2247 if (wrbuffer_refs == 0) 2248 ceph_check_caps(ci, 0); 2249 2250 wake_up_all(&ci->i_cap_wq); 2251 } 2252 2253 static void ceph_inode_work(struct work_struct *work) 2254 { 2255 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 2256 i_work); 2257 struct inode *inode = &ci->netfs.inode; 2258 struct ceph_client *cl = ceph_inode_to_client(inode); 2259 2260 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) { 2261 doutc(cl, "writeback %p %llx.%llx\n", inode, ceph_vinop(inode)); 2262 filemap_fdatawrite(&inode->i_data); 2263 } 2264 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask)) 2265 ceph_do_invalidate_pages(inode); 2266 2267 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask)) 2268 __ceph_do_pending_vmtruncate(inode); 2269 2270 if (test_and_clear_bit(CEPH_I_WORK_CHECK_CAPS, &ci->i_work_mask)) 2271 ceph_check_caps(ci, 0); 2272 2273 if (test_and_clear_bit(CEPH_I_WORK_FLUSH_SNAPS, &ci->i_work_mask)) 2274 ceph_flush_snaps(ci, NULL); 2275 2276 iput(inode); 2277 } 2278 2279 static const char *ceph_encrypted_get_link(struct dentry *dentry, 2280 struct inode *inode, 2281 struct delayed_call *done) 2282 { 2283 struct ceph_inode_info *ci = ceph_inode(inode); 2284 2285 if (!dentry) 2286 return ERR_PTR(-ECHILD); 2287 2288 return fscrypt_get_symlink(inode, ci->i_symlink, i_size_read(inode), 2289 done); 2290 } 2291 2292 static int ceph_encrypted_symlink_getattr(struct mnt_idmap *idmap, 2293 const struct path *path, 2294 struct kstat *stat, u32 request_mask, 2295 unsigned int query_flags) 2296 { 2297 int ret; 2298 2299 ret = ceph_getattr(idmap, path, stat, request_mask, query_flags); 2300 if (ret) 2301 return ret; 2302 return fscrypt_symlink_getattr(path, stat); 2303 } 2304 2305 /* 2306 * symlinks 2307 */ 2308 static const struct inode_operations ceph_symlink_iops = { 2309 .get_link = simple_get_link, 2310 .setattr = ceph_setattr, 2311 .getattr = ceph_getattr, 2312 .listxattr = ceph_listxattr, 2313 }; 2314 2315 static const struct inode_operations ceph_encrypted_symlink_iops = { 2316 .get_link = ceph_encrypted_get_link, 2317 .setattr = ceph_setattr, 2318 .getattr = ceph_encrypted_symlink_getattr, 2319 .listxattr = ceph_listxattr, 2320 }; 2321 2322 /* 2323 * Transfer the encrypted last block to the MDS and the MDS 2324 * will help update it when truncating a smaller size. 2325 * 2326 * We don't support a PAGE_SIZE that is smaller than the 2327 * CEPH_FSCRYPT_BLOCK_SIZE. 2328 */ 2329 static int fill_fscrypt_truncate(struct inode *inode, 2330 struct ceph_mds_request *req, 2331 struct iattr *attr) 2332 { 2333 struct ceph_client *cl = ceph_inode_to_client(inode); 2334 struct ceph_inode_info *ci = ceph_inode(inode); 2335 int boff = attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE; 2336 loff_t pos, orig_pos = round_down(attr->ia_size, 2337 CEPH_FSCRYPT_BLOCK_SIZE); 2338 u64 block = orig_pos >> CEPH_FSCRYPT_BLOCK_SHIFT; 2339 struct ceph_pagelist *pagelist = NULL; 2340 struct kvec iov = {0}; 2341 struct iov_iter iter; 2342 struct page *page = NULL; 2343 struct ceph_fscrypt_truncate_size_header header; 2344 int retry_op = 0; 2345 int len = CEPH_FSCRYPT_BLOCK_SIZE; 2346 loff_t i_size = i_size_read(inode); 2347 int got, ret, issued; 2348 u64 objver; 2349 2350 ret = __ceph_get_caps(inode, NULL, CEPH_CAP_FILE_RD, 0, -1, &got); 2351 if (ret < 0) 2352 return ret; 2353 2354 issued = __ceph_caps_issued(ci, NULL); 2355 2356 doutc(cl, "size %lld -> %lld got cap refs on %s, issued %s\n", 2357 i_size, attr->ia_size, ceph_cap_string(got), 2358 ceph_cap_string(issued)); 2359 2360 /* Try to writeback the dirty pagecaches */ 2361 if (issued & (CEPH_CAP_FILE_BUFFER)) { 2362 loff_t lend = orig_pos + CEPH_FSCRYPT_BLOCK_SHIFT - 1; 2363 2364 ret = filemap_write_and_wait_range(inode->i_mapping, 2365 orig_pos, lend); 2366 if (ret < 0) 2367 goto out; 2368 } 2369 2370 page = __page_cache_alloc(GFP_KERNEL); 2371 if (page == NULL) { 2372 ret = -ENOMEM; 2373 goto out; 2374 } 2375 2376 pagelist = ceph_pagelist_alloc(GFP_KERNEL); 2377 if (!pagelist) { 2378 ret = -ENOMEM; 2379 goto out; 2380 } 2381 2382 iov.iov_base = kmap_local_page(page); 2383 iov.iov_len = len; 2384 iov_iter_kvec(&iter, READ, &iov, 1, len); 2385 2386 pos = orig_pos; 2387 ret = __ceph_sync_read(inode, &pos, &iter, &retry_op, &objver); 2388 if (ret < 0) 2389 goto out; 2390 2391 /* Insert the header first */ 2392 header.ver = 1; 2393 header.compat = 1; 2394 header.change_attr = cpu_to_le64(inode_peek_iversion_raw(inode)); 2395 2396 /* 2397 * Always set the block_size to CEPH_FSCRYPT_BLOCK_SIZE, 2398 * because in MDS it may need this to do the truncate. 2399 */ 2400 header.block_size = cpu_to_le32(CEPH_FSCRYPT_BLOCK_SIZE); 2401 2402 /* 2403 * If we hit a hole here, we should just skip filling 2404 * the fscrypt for the request, because once the fscrypt 2405 * is enabled, the file will be split into many blocks 2406 * with the size of CEPH_FSCRYPT_BLOCK_SIZE, if there 2407 * has a hole, the hole size should be multiple of block 2408 * size. 2409 * 2410 * If the Rados object doesn't exist, it will be set to 0. 2411 */ 2412 if (!objver) { 2413 doutc(cl, "hit hole, ppos %lld < size %lld\n", pos, i_size); 2414 2415 header.data_len = cpu_to_le32(8 + 8 + 4); 2416 header.file_offset = 0; 2417 ret = 0; 2418 } else { 2419 header.data_len = cpu_to_le32(8 + 8 + 4 + CEPH_FSCRYPT_BLOCK_SIZE); 2420 header.file_offset = cpu_to_le64(orig_pos); 2421 2422 doutc(cl, "encrypt block boff/bsize %d/%lu\n", boff, 2423 CEPH_FSCRYPT_BLOCK_SIZE); 2424 2425 /* truncate and zero out the extra contents for the last block */ 2426 memset(iov.iov_base + boff, 0, PAGE_SIZE - boff); 2427 2428 /* encrypt the last block */ 2429 ret = ceph_fscrypt_encrypt_block_inplace(inode, page, 2430 CEPH_FSCRYPT_BLOCK_SIZE, 2431 0, block, 2432 GFP_KERNEL); 2433 if (ret) 2434 goto out; 2435 } 2436 2437 /* Insert the header */ 2438 ret = ceph_pagelist_append(pagelist, &header, sizeof(header)); 2439 if (ret) 2440 goto out; 2441 2442 if (header.block_size) { 2443 /* Append the last block contents to pagelist */ 2444 ret = ceph_pagelist_append(pagelist, iov.iov_base, 2445 CEPH_FSCRYPT_BLOCK_SIZE); 2446 if (ret) 2447 goto out; 2448 } 2449 req->r_pagelist = pagelist; 2450 out: 2451 doutc(cl, "%p %llx.%llx size dropping cap refs on %s\n", inode, 2452 ceph_vinop(inode), ceph_cap_string(got)); 2453 ceph_put_cap_refs(ci, got); 2454 if (iov.iov_base) 2455 kunmap_local(iov.iov_base); 2456 if (page) 2457 __free_pages(page, 0); 2458 if (ret && pagelist) 2459 ceph_pagelist_release(pagelist); 2460 return ret; 2461 } 2462 2463 int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode, 2464 struct iattr *attr, struct ceph_iattr *cia) 2465 { 2466 struct ceph_inode_info *ci = ceph_inode(inode); 2467 unsigned int ia_valid = attr->ia_valid; 2468 struct ceph_mds_request *req; 2469 struct ceph_mds_client *mdsc = ceph_sb_to_fs_client(inode->i_sb)->mdsc; 2470 struct ceph_client *cl = ceph_inode_to_client(inode); 2471 struct ceph_cap_flush *prealloc_cf; 2472 loff_t isize = i_size_read(inode); 2473 int issued; 2474 int release = 0, dirtied = 0; 2475 int mask = 0; 2476 int err = 0; 2477 int inode_dirty_flags = 0; 2478 bool lock_snap_rwsem = false; 2479 bool fill_fscrypt; 2480 int truncate_retry = 20; /* The RMW will take around 50ms */ 2481 2482 retry: 2483 prealloc_cf = ceph_alloc_cap_flush(); 2484 if (!prealloc_cf) 2485 return -ENOMEM; 2486 2487 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, 2488 USE_AUTH_MDS); 2489 if (IS_ERR(req)) { 2490 ceph_free_cap_flush(prealloc_cf); 2491 return PTR_ERR(req); 2492 } 2493 2494 fill_fscrypt = false; 2495 spin_lock(&ci->i_ceph_lock); 2496 issued = __ceph_caps_issued(ci, NULL); 2497 2498 if (!ci->i_head_snapc && 2499 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) { 2500 lock_snap_rwsem = true; 2501 if (!down_read_trylock(&mdsc->snap_rwsem)) { 2502 spin_unlock(&ci->i_ceph_lock); 2503 down_read(&mdsc->snap_rwsem); 2504 spin_lock(&ci->i_ceph_lock); 2505 issued = __ceph_caps_issued(ci, NULL); 2506 } 2507 } 2508 2509 doutc(cl, "%p %llx.%llx issued %s\n", inode, ceph_vinop(inode), 2510 ceph_cap_string(issued)); 2511 #if IS_ENABLED(CONFIG_FS_ENCRYPTION) 2512 if (cia && cia->fscrypt_auth) { 2513 u32 len = ceph_fscrypt_auth_len(cia->fscrypt_auth); 2514 2515 if (len > sizeof(*cia->fscrypt_auth)) { 2516 err = -EINVAL; 2517 spin_unlock(&ci->i_ceph_lock); 2518 goto out; 2519 } 2520 2521 doutc(cl, "%p %llx.%llx fscrypt_auth len %u to %u)\n", inode, 2522 ceph_vinop(inode), ci->fscrypt_auth_len, len); 2523 2524 /* It should never be re-set once set */ 2525 WARN_ON_ONCE(ci->fscrypt_auth); 2526 2527 if (issued & CEPH_CAP_AUTH_EXCL) { 2528 dirtied |= CEPH_CAP_AUTH_EXCL; 2529 kfree(ci->fscrypt_auth); 2530 ci->fscrypt_auth = (u8 *)cia->fscrypt_auth; 2531 ci->fscrypt_auth_len = len; 2532 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2533 ci->fscrypt_auth_len != len || 2534 memcmp(ci->fscrypt_auth, cia->fscrypt_auth, len)) { 2535 req->r_fscrypt_auth = cia->fscrypt_auth; 2536 mask |= CEPH_SETATTR_FSCRYPT_AUTH; 2537 release |= CEPH_CAP_AUTH_SHARED; 2538 } 2539 cia->fscrypt_auth = NULL; 2540 } 2541 #else 2542 if (cia && cia->fscrypt_auth) { 2543 err = -EINVAL; 2544 spin_unlock(&ci->i_ceph_lock); 2545 goto out; 2546 } 2547 #endif /* CONFIG_FS_ENCRYPTION */ 2548 2549 if (ia_valid & ATTR_UID) { 2550 kuid_t fsuid = from_vfsuid(idmap, i_user_ns(inode), attr->ia_vfsuid); 2551 2552 doutc(cl, "%p %llx.%llx uid %d -> %d\n", inode, 2553 ceph_vinop(inode), 2554 from_kuid(&init_user_ns, inode->i_uid), 2555 from_kuid(&init_user_ns, attr->ia_uid)); 2556 if (issued & CEPH_CAP_AUTH_EXCL) { 2557 inode->i_uid = fsuid; 2558 dirtied |= CEPH_CAP_AUTH_EXCL; 2559 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2560 !uid_eq(fsuid, inode->i_uid)) { 2561 req->r_args.setattr.uid = cpu_to_le32( 2562 from_kuid(&init_user_ns, fsuid)); 2563 mask |= CEPH_SETATTR_UID; 2564 release |= CEPH_CAP_AUTH_SHARED; 2565 } 2566 } 2567 if (ia_valid & ATTR_GID) { 2568 kgid_t fsgid = from_vfsgid(idmap, i_user_ns(inode), attr->ia_vfsgid); 2569 2570 doutc(cl, "%p %llx.%llx gid %d -> %d\n", inode, 2571 ceph_vinop(inode), 2572 from_kgid(&init_user_ns, inode->i_gid), 2573 from_kgid(&init_user_ns, attr->ia_gid)); 2574 if (issued & CEPH_CAP_AUTH_EXCL) { 2575 inode->i_gid = fsgid; 2576 dirtied |= CEPH_CAP_AUTH_EXCL; 2577 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2578 !gid_eq(fsgid, inode->i_gid)) { 2579 req->r_args.setattr.gid = cpu_to_le32( 2580 from_kgid(&init_user_ns, fsgid)); 2581 mask |= CEPH_SETATTR_GID; 2582 release |= CEPH_CAP_AUTH_SHARED; 2583 } 2584 } 2585 if (ia_valid & ATTR_MODE) { 2586 doutc(cl, "%p %llx.%llx mode 0%o -> 0%o\n", inode, 2587 ceph_vinop(inode), inode->i_mode, attr->ia_mode); 2588 if (issued & CEPH_CAP_AUTH_EXCL) { 2589 inode->i_mode = attr->ia_mode; 2590 dirtied |= CEPH_CAP_AUTH_EXCL; 2591 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2592 attr->ia_mode != inode->i_mode) { 2593 inode->i_mode = attr->ia_mode; 2594 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); 2595 mask |= CEPH_SETATTR_MODE; 2596 release |= CEPH_CAP_AUTH_SHARED; 2597 } 2598 } 2599 2600 if (ia_valid & ATTR_ATIME) { 2601 struct timespec64 atime = inode_get_atime(inode); 2602 2603 doutc(cl, "%p %llx.%llx atime %lld.%09ld -> %lld.%09ld\n", 2604 inode, ceph_vinop(inode), 2605 atime.tv_sec, atime.tv_nsec, 2606 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); 2607 if (issued & CEPH_CAP_FILE_EXCL) { 2608 ci->i_time_warp_seq++; 2609 inode_set_atime_to_ts(inode, attr->ia_atime); 2610 dirtied |= CEPH_CAP_FILE_EXCL; 2611 } else if ((issued & CEPH_CAP_FILE_WR) && 2612 timespec64_compare(&atime, 2613 &attr->ia_atime) < 0) { 2614 inode_set_atime_to_ts(inode, attr->ia_atime); 2615 dirtied |= CEPH_CAP_FILE_WR; 2616 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2617 !timespec64_equal(&atime, &attr->ia_atime)) { 2618 ceph_encode_timespec64(&req->r_args.setattr.atime, 2619 &attr->ia_atime); 2620 mask |= CEPH_SETATTR_ATIME; 2621 release |= CEPH_CAP_FILE_SHARED | 2622 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2623 } 2624 } 2625 if (ia_valid & ATTR_SIZE) { 2626 doutc(cl, "%p %llx.%llx size %lld -> %lld\n", inode, 2627 ceph_vinop(inode), isize, attr->ia_size); 2628 /* 2629 * Only when the new size is smaller and not aligned to 2630 * CEPH_FSCRYPT_BLOCK_SIZE will the RMW is needed. 2631 */ 2632 if (IS_ENCRYPTED(inode) && attr->ia_size < isize && 2633 (attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE)) { 2634 mask |= CEPH_SETATTR_SIZE; 2635 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2636 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2637 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2638 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2639 req->r_args.setattr.size = 2640 cpu_to_le64(round_up(attr->ia_size, 2641 CEPH_FSCRYPT_BLOCK_SIZE)); 2642 req->r_args.setattr.old_size = 2643 cpu_to_le64(round_up(isize, 2644 CEPH_FSCRYPT_BLOCK_SIZE)); 2645 req->r_fscrypt_file = attr->ia_size; 2646 fill_fscrypt = true; 2647 } else if ((issued & CEPH_CAP_FILE_EXCL) && attr->ia_size >= isize) { 2648 if (attr->ia_size > isize) { 2649 i_size_write(inode, attr->ia_size); 2650 inode->i_blocks = calc_inode_blocks(attr->ia_size); 2651 ci->i_reported_size = attr->ia_size; 2652 dirtied |= CEPH_CAP_FILE_EXCL; 2653 ia_valid |= ATTR_MTIME; 2654 } 2655 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2656 attr->ia_size != isize) { 2657 mask |= CEPH_SETATTR_SIZE; 2658 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2659 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2660 if (IS_ENCRYPTED(inode) && attr->ia_size) { 2661 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2662 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2663 req->r_args.setattr.size = 2664 cpu_to_le64(round_up(attr->ia_size, 2665 CEPH_FSCRYPT_BLOCK_SIZE)); 2666 req->r_args.setattr.old_size = 2667 cpu_to_le64(round_up(isize, 2668 CEPH_FSCRYPT_BLOCK_SIZE)); 2669 req->r_fscrypt_file = attr->ia_size; 2670 } else { 2671 req->r_args.setattr.size = cpu_to_le64(attr->ia_size); 2672 req->r_args.setattr.old_size = cpu_to_le64(isize); 2673 req->r_fscrypt_file = 0; 2674 } 2675 } 2676 } 2677 if (ia_valid & ATTR_MTIME) { 2678 struct timespec64 mtime = inode_get_mtime(inode); 2679 2680 doutc(cl, "%p %llx.%llx mtime %lld.%09ld -> %lld.%09ld\n", 2681 inode, ceph_vinop(inode), 2682 mtime.tv_sec, mtime.tv_nsec, 2683 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); 2684 if (issued & CEPH_CAP_FILE_EXCL) { 2685 ci->i_time_warp_seq++; 2686 inode_set_mtime_to_ts(inode, attr->ia_mtime); 2687 dirtied |= CEPH_CAP_FILE_EXCL; 2688 } else if ((issued & CEPH_CAP_FILE_WR) && 2689 timespec64_compare(&mtime, &attr->ia_mtime) < 0) { 2690 inode_set_mtime_to_ts(inode, attr->ia_mtime); 2691 dirtied |= CEPH_CAP_FILE_WR; 2692 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2693 !timespec64_equal(&mtime, &attr->ia_mtime)) { 2694 ceph_encode_timespec64(&req->r_args.setattr.mtime, 2695 &attr->ia_mtime); 2696 mask |= CEPH_SETATTR_MTIME; 2697 release |= CEPH_CAP_FILE_SHARED | 2698 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2699 } 2700 } 2701 2702 /* these do nothing */ 2703 if (ia_valid & ATTR_CTIME) { 2704 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| 2705 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; 2706 doutc(cl, "%p %llx.%llx ctime %lld.%09ld -> %lld.%09ld (%s)\n", 2707 inode, ceph_vinop(inode), 2708 inode_get_ctime_sec(inode), 2709 inode_get_ctime_nsec(inode), 2710 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, 2711 only ? "ctime only" : "ignored"); 2712 if (only) { 2713 /* 2714 * if kernel wants to dirty ctime but nothing else, 2715 * we need to choose a cap to dirty under, or do 2716 * a almost-no-op setattr 2717 */ 2718 if (issued & CEPH_CAP_AUTH_EXCL) 2719 dirtied |= CEPH_CAP_AUTH_EXCL; 2720 else if (issued & CEPH_CAP_FILE_EXCL) 2721 dirtied |= CEPH_CAP_FILE_EXCL; 2722 else if (issued & CEPH_CAP_XATTR_EXCL) 2723 dirtied |= CEPH_CAP_XATTR_EXCL; 2724 else 2725 mask |= CEPH_SETATTR_CTIME; 2726 } 2727 } 2728 if (ia_valid & ATTR_FILE) 2729 doutc(cl, "%p %llx.%llx ATTR_FILE ... hrm!\n", inode, 2730 ceph_vinop(inode)); 2731 2732 if (dirtied) { 2733 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied, 2734 &prealloc_cf); 2735 inode_set_ctime_to_ts(inode, attr->ia_ctime); 2736 inode_inc_iversion_raw(inode); 2737 } 2738 2739 release &= issued; 2740 spin_unlock(&ci->i_ceph_lock); 2741 if (lock_snap_rwsem) { 2742 up_read(&mdsc->snap_rwsem); 2743 lock_snap_rwsem = false; 2744 } 2745 2746 if (inode_dirty_flags) 2747 __mark_inode_dirty(inode, inode_dirty_flags); 2748 2749 if (mask) { 2750 req->r_inode = inode; 2751 ihold(inode); 2752 req->r_inode_drop = release; 2753 req->r_args.setattr.mask = cpu_to_le32(mask); 2754 req->r_num_caps = 1; 2755 req->r_stamp = attr->ia_ctime; 2756 if (fill_fscrypt) { 2757 err = fill_fscrypt_truncate(inode, req, attr); 2758 if (err) 2759 goto out; 2760 } 2761 2762 /* 2763 * The truncate request will return -EAGAIN when the 2764 * last block has been updated just before the MDS 2765 * successfully gets the xlock for the FILE lock. To 2766 * avoid corrupting the file contents we need to retry 2767 * it. 2768 */ 2769 err = ceph_mdsc_do_request(mdsc, NULL, req); 2770 if (err == -EAGAIN && truncate_retry--) { 2771 doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote), retry it!\n", 2772 inode, ceph_vinop(inode), err, 2773 ceph_cap_string(dirtied), mask); 2774 ceph_mdsc_put_request(req); 2775 ceph_free_cap_flush(prealloc_cf); 2776 goto retry; 2777 } 2778 } 2779 out: 2780 doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote)\n", inode, 2781 ceph_vinop(inode), err, ceph_cap_string(dirtied), mask); 2782 2783 ceph_mdsc_put_request(req); 2784 ceph_free_cap_flush(prealloc_cf); 2785 2786 if (err >= 0 && (mask & CEPH_SETATTR_SIZE)) 2787 __ceph_do_pending_vmtruncate(inode); 2788 2789 return err; 2790 } 2791 2792 /* 2793 * setattr 2794 */ 2795 int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 2796 struct iattr *attr) 2797 { 2798 struct inode *inode = d_inode(dentry); 2799 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); 2800 int err; 2801 2802 if (ceph_snap(inode) != CEPH_NOSNAP) 2803 return -EROFS; 2804 2805 if (ceph_inode_is_shutdown(inode)) 2806 return -ESTALE; 2807 2808 err = fscrypt_prepare_setattr(dentry, attr); 2809 if (err) 2810 return err; 2811 2812 err = setattr_prepare(idmap, dentry, attr); 2813 if (err != 0) 2814 return err; 2815 2816 if ((attr->ia_valid & ATTR_SIZE) && 2817 attr->ia_size > max(i_size_read(inode), fsc->max_file_size)) 2818 return -EFBIG; 2819 2820 if ((attr->ia_valid & ATTR_SIZE) && 2821 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) 2822 return -EDQUOT; 2823 2824 err = __ceph_setattr(idmap, inode, attr, NULL); 2825 2826 if (err >= 0 && (attr->ia_valid & ATTR_MODE)) 2827 err = posix_acl_chmod(idmap, dentry, attr->ia_mode); 2828 2829 return err; 2830 } 2831 2832 int ceph_try_to_choose_auth_mds(struct inode *inode, int mask) 2833 { 2834 int issued = ceph_caps_issued(ceph_inode(inode)); 2835 2836 /* 2837 * If any 'x' caps is issued we can just choose the auth MDS 2838 * instead of the random replica MDSes. Because only when the 2839 * Locker is in LOCK_EXEC state will the loner client could 2840 * get the 'x' caps. And if we send the getattr requests to 2841 * any replica MDS it must auth pin and tries to rdlock from 2842 * the auth MDS, and then the auth MDS need to do the Locker 2843 * state transition to LOCK_SYNC. And after that the lock state 2844 * will change back. 2845 * 2846 * This cost much when doing the Locker state transition and 2847 * usually will need to revoke caps from clients. 2848 * 2849 * And for the 'Xs' caps for getxattr we will also choose the 2850 * auth MDS, because the MDS side code is buggy due to setxattr 2851 * won't notify the replica MDSes when the values changed and 2852 * the replica MDS will return the old values. Though we will 2853 * fix it in MDS code, but this still makes sense for old ceph. 2854 */ 2855 if (((mask & CEPH_CAP_ANY_SHARED) && (issued & CEPH_CAP_ANY_EXCL)) 2856 || (mask & (CEPH_STAT_RSTAT | CEPH_STAT_CAP_XATTR))) 2857 return USE_AUTH_MDS; 2858 else 2859 return USE_ANY_MDS; 2860 } 2861 2862 /* 2863 * Verify that we have a lease on the given mask. If not, 2864 * do a getattr against an mds. 2865 */ 2866 int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 2867 int mask, bool force) 2868 { 2869 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb); 2870 struct ceph_client *cl = fsc->client; 2871 struct ceph_mds_client *mdsc = fsc->mdsc; 2872 struct ceph_mds_request *req; 2873 int mode; 2874 int err; 2875 2876 if (ceph_snap(inode) == CEPH_SNAPDIR) { 2877 doutc(cl, "inode %p %llx.%llx SNAPDIR\n", inode, 2878 ceph_vinop(inode)); 2879 return 0; 2880 } 2881 2882 doutc(cl, "inode %p %llx.%llx mask %s mode 0%o\n", inode, 2883 ceph_vinop(inode), ceph_cap_string(mask), inode->i_mode); 2884 if (!force && ceph_caps_issued_mask_metric(ceph_inode(inode), mask, 1)) 2885 return 0; 2886 2887 mode = ceph_try_to_choose_auth_mds(inode, mask); 2888 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode); 2889 if (IS_ERR(req)) 2890 return PTR_ERR(req); 2891 req->r_inode = inode; 2892 ihold(inode); 2893 req->r_num_caps = 1; 2894 req->r_args.getattr.mask = cpu_to_le32(mask); 2895 req->r_locked_page = locked_page; 2896 err = ceph_mdsc_do_request(mdsc, NULL, req); 2897 if (locked_page && err == 0) { 2898 u64 inline_version = req->r_reply_info.targeti.inline_version; 2899 if (inline_version == 0) { 2900 /* the reply is supposed to contain inline data */ 2901 err = -EINVAL; 2902 } else if (inline_version == CEPH_INLINE_NONE || 2903 inline_version == 1) { 2904 err = -ENODATA; 2905 } else { 2906 err = req->r_reply_info.targeti.inline_len; 2907 } 2908 } 2909 ceph_mdsc_put_request(req); 2910 doutc(cl, "result=%d\n", err); 2911 return err; 2912 } 2913 2914 int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, 2915 size_t size) 2916 { 2917 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb); 2918 struct ceph_client *cl = fsc->client; 2919 struct ceph_mds_client *mdsc = fsc->mdsc; 2920 struct ceph_mds_request *req; 2921 int mode = USE_AUTH_MDS; 2922 int err; 2923 char *xattr_value; 2924 size_t xattr_value_len; 2925 2926 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETVXATTR, mode); 2927 if (IS_ERR(req)) { 2928 err = -ENOMEM; 2929 goto out; 2930 } 2931 2932 req->r_feature_needed = CEPHFS_FEATURE_OP_GETVXATTR; 2933 req->r_path2 = kstrdup(name, GFP_NOFS); 2934 if (!req->r_path2) { 2935 err = -ENOMEM; 2936 goto put; 2937 } 2938 2939 ihold(inode); 2940 req->r_inode = inode; 2941 err = ceph_mdsc_do_request(mdsc, NULL, req); 2942 if (err < 0) 2943 goto put; 2944 2945 xattr_value = req->r_reply_info.xattr_info.xattr_value; 2946 xattr_value_len = req->r_reply_info.xattr_info.xattr_value_len; 2947 2948 doutc(cl, "xattr_value_len:%zu, size:%zu\n", xattr_value_len, size); 2949 2950 err = (int)xattr_value_len; 2951 if (size == 0) 2952 goto put; 2953 2954 if (xattr_value_len > size) { 2955 err = -ERANGE; 2956 goto put; 2957 } 2958 2959 memcpy(value, xattr_value, xattr_value_len); 2960 put: 2961 ceph_mdsc_put_request(req); 2962 out: 2963 doutc(cl, "result=%d\n", err); 2964 return err; 2965 } 2966 2967 2968 /* 2969 * Check inode permissions. We verify we have a valid value for 2970 * the AUTH cap, then call the generic handler. 2971 */ 2972 int ceph_permission(struct mnt_idmap *idmap, struct inode *inode, 2973 int mask) 2974 { 2975 int err; 2976 2977 if (mask & MAY_NOT_BLOCK) 2978 return -ECHILD; 2979 2980 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); 2981 2982 if (!err) 2983 err = generic_permission(idmap, inode, mask); 2984 return err; 2985 } 2986 2987 /* Craft a mask of needed caps given a set of requested statx attrs. */ 2988 static int statx_to_caps(u32 want, umode_t mode) 2989 { 2990 int mask = 0; 2991 2992 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME|STATX_CHANGE_COOKIE)) 2993 mask |= CEPH_CAP_AUTH_SHARED; 2994 2995 if (want & (STATX_NLINK|STATX_CTIME|STATX_CHANGE_COOKIE)) { 2996 /* 2997 * The link count for directories depends on inode->i_subdirs, 2998 * and that is only updated when Fs caps are held. 2999 */ 3000 if (S_ISDIR(mode)) 3001 mask |= CEPH_CAP_FILE_SHARED; 3002 else 3003 mask |= CEPH_CAP_LINK_SHARED; 3004 } 3005 3006 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|STATX_BLOCKS|STATX_CHANGE_COOKIE)) 3007 mask |= CEPH_CAP_FILE_SHARED; 3008 3009 if (want & (STATX_CTIME|STATX_CHANGE_COOKIE)) 3010 mask |= CEPH_CAP_XATTR_SHARED; 3011 3012 return mask; 3013 } 3014 3015 /* 3016 * Get all the attributes. If we have sufficient caps for the requested attrs, 3017 * then we can avoid talking to the MDS at all. 3018 */ 3019 int ceph_getattr(struct mnt_idmap *idmap, const struct path *path, 3020 struct kstat *stat, u32 request_mask, unsigned int flags) 3021 { 3022 struct inode *inode = d_inode(path->dentry); 3023 struct super_block *sb = inode->i_sb; 3024 struct ceph_inode_info *ci = ceph_inode(inode); 3025 u32 valid_mask = STATX_BASIC_STATS; 3026 int err = 0; 3027 3028 if (ceph_inode_is_shutdown(inode)) 3029 return -ESTALE; 3030 3031 /* Skip the getattr altogether if we're asked not to sync */ 3032 if ((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) { 3033 err = ceph_do_getattr(inode, 3034 statx_to_caps(request_mask, inode->i_mode), 3035 flags & AT_STATX_FORCE_SYNC); 3036 if (err) 3037 return err; 3038 } 3039 3040 generic_fillattr(idmap, request_mask, inode, stat); 3041 stat->ino = ceph_present_inode(inode); 3042 3043 /* 3044 * btime on newly-allocated inodes is 0, so if this is still set to 3045 * that, then assume that it's not valid. 3046 */ 3047 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) { 3048 stat->btime = ci->i_btime; 3049 valid_mask |= STATX_BTIME; 3050 } 3051 3052 if (request_mask & STATX_CHANGE_COOKIE) { 3053 stat->change_cookie = inode_peek_iversion_raw(inode); 3054 valid_mask |= STATX_CHANGE_COOKIE; 3055 } 3056 3057 if (ceph_snap(inode) == CEPH_NOSNAP) 3058 stat->dev = sb->s_dev; 3059 else 3060 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0; 3061 3062 if (S_ISDIR(inode->i_mode)) { 3063 if (ceph_test_mount_opt(ceph_sb_to_fs_client(sb), RBYTES)) { 3064 stat->size = ci->i_rbytes; 3065 } else if (ceph_snap(inode) == CEPH_SNAPDIR) { 3066 struct ceph_inode_info *pci; 3067 struct ceph_snap_realm *realm; 3068 struct inode *parent; 3069 3070 parent = ceph_lookup_inode(sb, ceph_ino(inode)); 3071 if (IS_ERR(parent)) 3072 return PTR_ERR(parent); 3073 3074 pci = ceph_inode(parent); 3075 spin_lock(&pci->i_ceph_lock); 3076 realm = pci->i_snap_realm; 3077 if (realm) 3078 stat->size = realm->num_snaps; 3079 else 3080 stat->size = 0; 3081 spin_unlock(&pci->i_ceph_lock); 3082 iput(parent); 3083 } else { 3084 stat->size = ci->i_files + ci->i_subdirs; 3085 } 3086 stat->blocks = 0; 3087 stat->blksize = 65536; 3088 /* 3089 * Some applications rely on the number of st_nlink 3090 * value on directories to be either 0 (if unlinked) 3091 * or 2 + number of subdirectories. 3092 */ 3093 if (stat->nlink == 1) 3094 /* '.' + '..' + subdirs */ 3095 stat->nlink = 1 + 1 + ci->i_subdirs; 3096 } 3097 3098 stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC; 3099 if (IS_ENCRYPTED(inode)) 3100 stat->attributes |= STATX_ATTR_ENCRYPTED; 3101 stat->attributes_mask |= (STATX_ATTR_CHANGE_MONOTONIC | 3102 STATX_ATTR_ENCRYPTED); 3103 3104 stat->result_mask = request_mask & valid_mask; 3105 return err; 3106 } 3107 3108 void ceph_inode_shutdown(struct inode *inode) 3109 { 3110 struct ceph_inode_info *ci = ceph_inode(inode); 3111 struct rb_node *p; 3112 int iputs = 0; 3113 bool invalidate = false; 3114 3115 spin_lock(&ci->i_ceph_lock); 3116 ci->i_ceph_flags |= CEPH_I_SHUTDOWN; 3117 p = rb_first(&ci->i_caps); 3118 while (p) { 3119 struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); 3120 3121 p = rb_next(p); 3122 iputs += ceph_purge_inode_cap(inode, cap, &invalidate); 3123 } 3124 spin_unlock(&ci->i_ceph_lock); 3125 3126 if (invalidate) 3127 ceph_queue_invalidate(inode); 3128 while (iputs--) 3129 iput(inode); 3130 } 3131