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 37static const struct inode_operations ceph_symlink_iops; 38static const struct inode_operations ceph_encrypted_symlink_iops; 39 40static void ceph_inode_work(struct work_struct *work); 41 42/* 43 * find or create an inode, given the ceph ino number 44 */ 45static 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 */ 71struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry, 72 umode_t *mode, struct ceph_acl_sec_ctx *as_ctx) 73{ 74 int err; 75 struct inode *inode; 76 77 inode = new_inode(dir->i_sb); 78 if (!inode) 79 return ERR_PTR(-ENOMEM); 80 81 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT; 82 83 if (!S_ISLNK(*mode)) { 84 err = ceph_pre_init_acls(dir, mode, as_ctx); 85 if (err < 0) 86 goto out_err; 87 } 88 89 inode->i_state = 0; 90 inode->i_mode = *mode; 91 92 err = ceph_security_init_secctx(dentry, *mode, as_ctx); 93 if (err < 0) 94 goto out_err; 95 96 /* 97 * We'll skip setting fscrypt context for snapshots, leaving that for 98 * the handle_reply(). 99 */ 100 if (ceph_snap(dir) != CEPH_SNAPDIR) { 101 err = ceph_fscrypt_prepare_context(dir, inode, as_ctx); 102 if (err) 103 goto out_err; 104 } 105 106 return inode; 107out_err: 108 iput(inode); 109 return ERR_PTR(err); 110} 111 112void ceph_as_ctx_to_req(struct ceph_mds_request *req, 113 struct ceph_acl_sec_ctx *as_ctx) 114{ 115 if (as_ctx->pagelist) { 116 req->r_pagelist = as_ctx->pagelist; 117 as_ctx->pagelist = NULL; 118 } 119 ceph_fscrypt_as_ctx_to_req(req, as_ctx); 120} 121 122/** 123 * ceph_get_inode - find or create/hash a new inode 124 * @sb: superblock to search and allocate in 125 * @vino: vino to search for 126 * @newino: optional new inode to insert if one isn't found (may be NULL) 127 * 128 * Search for or insert a new inode into the hash for the given vino, and 129 * return a reference to it. If new is non-NULL, its reference is consumed. 130 */ 131struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino, 132 struct inode *newino) 133{ 134 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); 135 struct ceph_client *cl = mdsc->fsc->client; 136 struct inode *inode; 137 138 if (ceph_vino_is_reserved(vino)) 139 return ERR_PTR(-EREMOTEIO); 140 141 if (newino) { 142 inode = inode_insert5(newino, (unsigned long)vino.ino, 143 ceph_ino_compare, ceph_set_ino_cb, &vino); 144 if (inode != newino) 145 iput(newino); 146 } else { 147 inode = iget5_locked(sb, (unsigned long)vino.ino, 148 ceph_ino_compare, ceph_set_ino_cb, &vino); 149 } 150 151 if (!inode) { 152 doutc(cl, "no inode found for %llx.%llx\n", vino.ino, vino.snap); 153 return ERR_PTR(-ENOMEM); 154 } 155 156 doutc(cl, "on %llx=%llx.%llx got %p new %d\n", 157 ceph_present_inode(inode), ceph_vinop(inode), inode, 158 !!(inode->i_state & I_NEW)); 159 return inode; 160} 161 162/* 163 * get/constuct snapdir inode for a given directory 164 */ 165struct inode *ceph_get_snapdir(struct inode *parent) 166{ 167 struct ceph_client *cl = ceph_inode_to_client(parent); 168 struct ceph_vino vino = { 169 .ino = ceph_ino(parent), 170 .snap = CEPH_SNAPDIR, 171 }; 172 struct inode *inode = ceph_get_inode(parent->i_sb, vino, NULL); 173 struct ceph_inode_info *ci = ceph_inode(inode); 174 int ret = -ENOTDIR; 175 176 if (IS_ERR(inode)) 177 return inode; 178 179 if (!S_ISDIR(parent->i_mode)) { 180 pr_warn_once_client(cl, "bad snapdir parent type (mode=0%o)\n", 181 parent->i_mode); 182 goto err; 183 } 184 185 if (!(inode->i_state & I_NEW) && !S_ISDIR(inode->i_mode)) { 186 pr_warn_once_client(cl, "bad snapdir inode type (mode=0%o)\n", 187 inode->i_mode); 188 goto err; 189 } 190 191 inode->i_mode = parent->i_mode; 192 inode->i_uid = parent->i_uid; 193 inode->i_gid = parent->i_gid; 194 inode_set_mtime_to_ts(inode, inode_get_mtime(parent)); 195 inode_set_ctime_to_ts(inode, inode_get_ctime(parent)); 196 inode_set_atime_to_ts(inode, inode_get_atime(parent)); 197 ci->i_rbytes = 0; 198 ci->i_btime = ceph_inode(parent)->i_btime; 199 200#ifdef CONFIG_FS_ENCRYPTION 201 /* if encrypted, just borrow fscrypt_auth from parent */ 202 if (IS_ENCRYPTED(parent)) { 203 struct ceph_inode_info *pci = ceph_inode(parent); 204 205 ci->fscrypt_auth = kmemdup(pci->fscrypt_auth, 206 pci->fscrypt_auth_len, 207 GFP_KERNEL); 208 if (ci->fscrypt_auth) { 209 inode->i_flags |= S_ENCRYPTED; 210 ci->fscrypt_auth_len = pci->fscrypt_auth_len; 211 } else { 212 doutc(cl, "Failed to alloc snapdir fscrypt_auth\n"); 213 ret = -ENOMEM; 214 goto err; 215 } 216 } 217#endif 218 if (inode->i_state & I_NEW) { 219 inode->i_op = &ceph_snapdir_iops; 220 inode->i_fop = &ceph_snapdir_fops; 221 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ 222 unlock_new_inode(inode); 223 } 224 225 return inode; 226err: 227 if ((inode->i_state & I_NEW)) 228 discard_new_inode(inode); 229 else 230 iput(inode); 231 return ERR_PTR(ret); 232} 233 234const struct inode_operations ceph_file_iops = { 235 .permission = ceph_permission, 236 .setattr = ceph_setattr, 237 .getattr = ceph_getattr, 238 .listxattr = ceph_listxattr, 239 .get_inode_acl = ceph_get_acl, 240 .set_acl = ceph_set_acl, 241}; 242 243 244/* 245 * We use a 'frag tree' to keep track of the MDS's directory fragments 246 * for a given inode (usually there is just a single fragment). We 247 * need to know when a child frag is delegated to a new MDS, or when 248 * it is flagged as replicated, so we can direct our requests 249 * accordingly. 250 */ 251 252/* 253 * find/create a frag in the tree 254 */ 255static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, 256 u32 f) 257{ 258 struct inode *inode = &ci->netfs.inode; 259 struct ceph_client *cl = ceph_inode_to_client(inode); 260 struct rb_node **p; 261 struct rb_node *parent = NULL; 262 struct ceph_inode_frag *frag; 263 int c; 264 265 p = &ci->i_fragtree.rb_node; 266 while (*p) { 267 parent = *p; 268 frag = rb_entry(parent, struct ceph_inode_frag, node); 269 c = ceph_frag_compare(f, frag->frag); 270 if (c < 0) 271 p = &(*p)->rb_left; 272 else if (c > 0) 273 p = &(*p)->rb_right; 274 else 275 return frag; 276 } 277 278 frag = kmalloc(sizeof(*frag), GFP_NOFS); 279 if (!frag) 280 return ERR_PTR(-ENOMEM); 281 282 frag->frag = f; 283 frag->split_by = 0; 284 frag->mds = -1; 285 frag->ndist = 0; 286 287 rb_link_node(&frag->node, parent, p); 288 rb_insert_color(&frag->node, &ci->i_fragtree); 289 290 doutc(cl, "added %p %llx.%llx frag %x\n", inode, ceph_vinop(inode), f); 291 return frag; 292} 293 294/* 295 * find a specific frag @f 296 */ 297struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) 298{ 299 struct rb_node *n = ci->i_fragtree.rb_node; 300 301 while (n) { 302 struct ceph_inode_frag *frag = 303 rb_entry(n, struct ceph_inode_frag, node); 304 int c = ceph_frag_compare(f, frag->frag); 305 if (c < 0) 306 n = n->rb_left; 307 else if (c > 0) 308 n = n->rb_right; 309 else 310 return frag; 311 } 312 return NULL; 313} 314 315/* 316 * Choose frag containing the given value @v. If @pfrag is 317 * specified, copy the frag delegation info to the caller if 318 * it is present. 319 */ 320static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 321 struct ceph_inode_frag *pfrag, int *found) 322{ 323 struct ceph_client *cl = ceph_inode_to_client(&ci->netfs.inode); 324 u32 t = ceph_frag_make(0, 0); 325 struct ceph_inode_frag *frag; 326 unsigned nway, i; 327 u32 n; 328 329 if (found) 330 *found = 0; 331 332 while (1) { 333 WARN_ON(!ceph_frag_contains_value(t, v)); 334 frag = __ceph_find_frag(ci, t); 335 if (!frag) 336 break; /* t is a leaf */ 337 if (frag->split_by == 0) { 338 if (pfrag) 339 memcpy(pfrag, frag, sizeof(*pfrag)); 340 if (found) 341 *found = 1; 342 break; 343 } 344 345 /* choose child */ 346 nway = 1 << frag->split_by; 347 doutc(cl, "frag(%x) %x splits by %d (%d ways)\n", v, t, 348 frag->split_by, nway); 349 for (i = 0; i < nway; i++) { 350 n = ceph_frag_make_child(t, frag->split_by, i); 351 if (ceph_frag_contains_value(n, v)) { 352 t = n; 353 break; 354 } 355 } 356 BUG_ON(i == nway); 357 } 358 doutc(cl, "frag(%x) = %x\n", v, t); 359 360 return t; 361} 362 363u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 364 struct ceph_inode_frag *pfrag, int *found) 365{ 366 u32 ret; 367 mutex_lock(&ci->i_fragtree_mutex); 368 ret = __ceph_choose_frag(ci, v, pfrag, found); 369 mutex_unlock(&ci->i_fragtree_mutex); 370 return ret; 371} 372 373/* 374 * Process dirfrag (delegation) info from the mds. Include leaf 375 * fragment in tree ONLY if ndist > 0. Otherwise, only 376 * branches/splits are included in i_fragtree) 377 */ 378static int ceph_fill_dirfrag(struct inode *inode, 379 struct ceph_mds_reply_dirfrag *dirinfo) 380{ 381 struct ceph_inode_info *ci = ceph_inode(inode); 382 struct ceph_client *cl = ceph_inode_to_client(inode); 383 struct ceph_inode_frag *frag; 384 u32 id = le32_to_cpu(dirinfo->frag); 385 int mds = le32_to_cpu(dirinfo->auth); 386 int ndist = le32_to_cpu(dirinfo->ndist); 387 int diri_auth = -1; 388 int i; 389 int err = 0; 390 391 spin_lock(&ci->i_ceph_lock); 392 if (ci->i_auth_cap) 393 diri_auth = ci->i_auth_cap->mds; 394 spin_unlock(&ci->i_ceph_lock); 395 396 if (mds == -1) /* CDIR_AUTH_PARENT */ 397 mds = diri_auth; 398 399 mutex_lock(&ci->i_fragtree_mutex); 400 if (ndist == 0 && mds == diri_auth) { 401 /* no delegation info needed. */ 402 frag = __ceph_find_frag(ci, id); 403 if (!frag) 404 goto out; 405 if (frag->split_by == 0) { 406 /* tree leaf, remove */ 407 doutc(cl, "removed %p %llx.%llx frag %x (no ref)\n", 408 inode, ceph_vinop(inode), id); 409 rb_erase(&frag->node, &ci->i_fragtree); 410 kfree(frag); 411 } else { 412 /* tree branch, keep and clear */ 413 doutc(cl, "cleared %p %llx.%llx frag %x referral\n", 414 inode, ceph_vinop(inode), id); 415 frag->mds = -1; 416 frag->ndist = 0; 417 } 418 goto out; 419 } 420 421 422 /* find/add this frag to store mds delegation info */ 423 frag = __get_or_create_frag(ci, id); 424 if (IS_ERR(frag)) { 425 /* this is not the end of the world; we can continue 426 with bad/inaccurate delegation info */ 427 pr_err_client(cl, "ENOMEM on mds ref %p %llx.%llx fg %x\n", 428 inode, ceph_vinop(inode), 429 le32_to_cpu(dirinfo->frag)); 430 err = -ENOMEM; 431 goto out; 432 } 433 434 frag->mds = mds; 435 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); 436 for (i = 0; i < frag->ndist; i++) 437 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); 438 doutc(cl, "%p %llx.%llx frag %x ndist=%d\n", inode, 439 ceph_vinop(inode), frag->frag, frag->ndist); 440 441out: 442 mutex_unlock(&ci->i_fragtree_mutex); 443 return err; 444} 445 446static int frag_tree_split_cmp(const void *l, const void *r) 447{ 448 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l; 449 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r; 450 return ceph_frag_compare(le32_to_cpu(ls->frag), 451 le32_to_cpu(rs->frag)); 452} 453 454static bool is_frag_child(u32 f, struct ceph_inode_frag *frag) 455{ 456 if (!frag) 457 return f == ceph_frag_make(0, 0); 458 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by) 459 return false; 460 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f)); 461} 462 463static int ceph_fill_fragtree(struct inode *inode, 464 struct ceph_frag_tree_head *fragtree, 465 struct ceph_mds_reply_dirfrag *dirinfo) 466{ 467 struct ceph_client *cl = ceph_inode_to_client(inode); 468 struct ceph_inode_info *ci = ceph_inode(inode); 469 struct ceph_inode_frag *frag, *prev_frag = NULL; 470 struct rb_node *rb_node; 471 unsigned i, split_by, nsplits; 472 u32 id; 473 bool update = false; 474 475 mutex_lock(&ci->i_fragtree_mutex); 476 nsplits = le32_to_cpu(fragtree->nsplits); 477 if (nsplits != ci->i_fragtree_nsplits) { 478 update = true; 479 } else if (nsplits) { 480 i = get_random_u32_below(nsplits); 481 id = le32_to_cpu(fragtree->splits[i].frag); 482 if (!__ceph_find_frag(ci, id)) 483 update = true; 484 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) { 485 rb_node = rb_first(&ci->i_fragtree); 486 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 487 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node)) 488 update = true; 489 } 490 if (!update && dirinfo) { 491 id = le32_to_cpu(dirinfo->frag); 492 if (id != __ceph_choose_frag(ci, id, NULL, NULL)) 493 update = true; 494 } 495 if (!update) 496 goto out_unlock; 497 498 if (nsplits > 1) { 499 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]), 500 frag_tree_split_cmp, NULL); 501 } 502 503 doutc(cl, "%p %llx.%llx\n", inode, ceph_vinop(inode)); 504 rb_node = rb_first(&ci->i_fragtree); 505 for (i = 0; i < nsplits; i++) { 506 id = le32_to_cpu(fragtree->splits[i].frag); 507 split_by = le32_to_cpu(fragtree->splits[i].by); 508 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) { 509 pr_err_client(cl, "%p %llx.%llx invalid split %d/%u, " 510 "frag %x split by %d\n", inode, 511 ceph_vinop(inode), i, nsplits, id, split_by); 512 continue; 513 } 514 frag = NULL; 515 while (rb_node) { 516 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 517 if (ceph_frag_compare(frag->frag, id) >= 0) { 518 if (frag->frag != id) 519 frag = NULL; 520 else 521 rb_node = rb_next(rb_node); 522 break; 523 } 524 rb_node = rb_next(rb_node); 525 /* delete stale split/leaf node */ 526 if (frag->split_by > 0 || 527 !is_frag_child(frag->frag, prev_frag)) { 528 rb_erase(&frag->node, &ci->i_fragtree); 529 if (frag->split_by > 0) 530 ci->i_fragtree_nsplits--; 531 kfree(frag); 532 } 533 frag = NULL; 534 } 535 if (!frag) { 536 frag = __get_or_create_frag(ci, id); 537 if (IS_ERR(frag)) 538 continue; 539 } 540 if (frag->split_by == 0) 541 ci->i_fragtree_nsplits++; 542 frag->split_by = split_by; 543 doutc(cl, " frag %x split by %d\n", frag->frag, frag->split_by); 544 prev_frag = frag; 545 } 546 while (rb_node) { 547 frag = rb_entry(rb_node, struct ceph_inode_frag, node); 548 rb_node = rb_next(rb_node); 549 /* delete stale split/leaf node */ 550 if (frag->split_by > 0 || 551 !is_frag_child(frag->frag, prev_frag)) { 552 rb_erase(&frag->node, &ci->i_fragtree); 553 if (frag->split_by > 0) 554 ci->i_fragtree_nsplits--; 555 kfree(frag); 556 } 557 } 558out_unlock: 559 mutex_unlock(&ci->i_fragtree_mutex); 560 return 0; 561} 562 563/* 564 * initialize a newly allocated inode. 565 */ 566struct inode *ceph_alloc_inode(struct super_block *sb) 567{ 568 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb); 569 struct ceph_inode_info *ci; 570 int i; 571 572 ci = alloc_inode_sb(sb, ceph_inode_cachep, GFP_NOFS); 573 if (!ci) 574 return NULL; 575 576 doutc(fsc->client, "%p\n", &ci->netfs.inode); 577 578 /* Set parameters for the netfs library */ 579 netfs_inode_init(&ci->netfs, &ceph_netfs_ops, false); 580 581 spin_lock_init(&ci->i_ceph_lock); 582 583 ci->i_version = 0; 584 ci->i_inline_version = 0; 585 ci->i_time_warp_seq = 0; 586 ci->i_ceph_flags = 0; 587 atomic64_set(&ci->i_ordered_count, 1); 588 atomic64_set(&ci->i_release_count, 1); 589 atomic64_set(&ci->i_complete_seq[0], 0); 590 atomic64_set(&ci->i_complete_seq[1], 0); 591 ci->i_symlink = NULL; 592 593 ci->i_max_bytes = 0; 594 ci->i_max_files = 0; 595 596 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); 597 memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout)); 598 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL); 599 600 ci->i_fragtree = RB_ROOT; 601 mutex_init(&ci->i_fragtree_mutex); 602 603 ci->i_xattrs.blob = NULL; 604 ci->i_xattrs.prealloc_blob = NULL; 605 ci->i_xattrs.dirty = false; 606 ci->i_xattrs.index = RB_ROOT; 607 ci->i_xattrs.count = 0; 608 ci->i_xattrs.names_size = 0; 609 ci->i_xattrs.vals_size = 0; 610 ci->i_xattrs.version = 0; 611 ci->i_xattrs.index_version = 0; 612 613 ci->i_caps = RB_ROOT; 614 ci->i_auth_cap = NULL; 615 ci->i_dirty_caps = 0; 616 ci->i_flushing_caps = 0; 617 INIT_LIST_HEAD(&ci->i_dirty_item); 618 INIT_LIST_HEAD(&ci->i_flushing_item); 619 ci->i_prealloc_cap_flush = NULL; 620 INIT_LIST_HEAD(&ci->i_cap_flush_list); 621 init_waitqueue_head(&ci->i_cap_wq); 622 ci->i_hold_caps_max = 0; 623 INIT_LIST_HEAD(&ci->i_cap_delay_list); 624 INIT_LIST_HEAD(&ci->i_cap_snaps); 625 ci->i_head_snapc = NULL; 626 ci->i_snap_caps = 0; 627 628 ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ; 629 for (i = 0; i < CEPH_FILE_MODE_BITS; i++) 630 ci->i_nr_by_mode[i] = 0; 631 632 mutex_init(&ci->i_truncate_mutex); 633 ci->i_truncate_seq = 0; 634 ci->i_truncate_size = 0; 635 ci->i_truncate_pending = 0; 636 ci->i_truncate_pagecache_size = 0; 637 638 ci->i_max_size = 0; 639 ci->i_reported_size = 0; 640 ci->i_wanted_max_size = 0; 641 ci->i_requested_max_size = 0; 642 643 ci->i_pin_ref = 0; 644 ci->i_rd_ref = 0; 645 ci->i_rdcache_ref = 0; 646 ci->i_wr_ref = 0; 647 ci->i_wb_ref = 0; 648 ci->i_fx_ref = 0; 649 ci->i_wrbuffer_ref = 0; 650 ci->i_wrbuffer_ref_head = 0; 651 atomic_set(&ci->i_filelock_ref, 0); 652 atomic_set(&ci->i_shared_gen, 1); 653 ci->i_rdcache_gen = 0; 654 ci->i_rdcache_revoking = 0; 655 656 INIT_LIST_HEAD(&ci->i_unsafe_dirops); 657 INIT_LIST_HEAD(&ci->i_unsafe_iops); 658 spin_lock_init(&ci->i_unsafe_lock); 659 660 ci->i_snap_realm = NULL; 661 INIT_LIST_HEAD(&ci->i_snap_realm_item); 662 INIT_LIST_HEAD(&ci->i_snap_flush_item); 663 664 INIT_WORK(&ci->i_work, ceph_inode_work); 665 ci->i_work_mask = 0; 666 memset(&ci->i_btime, '\0', sizeof(ci->i_btime)); 667#ifdef CONFIG_FS_ENCRYPTION 668 ci->fscrypt_auth = NULL; 669 ci->fscrypt_auth_len = 0; 670#endif 671 return &ci->netfs.inode; 672} 673 674void ceph_free_inode(struct inode *inode) 675{ 676 struct ceph_inode_info *ci = ceph_inode(inode); 677 678 kfree(ci->i_symlink); 679#ifdef CONFIG_FS_ENCRYPTION 680 kfree(ci->fscrypt_auth); 681#endif 682 fscrypt_free_inode(inode); 683 kmem_cache_free(ceph_inode_cachep, ci); 684} 685 686void ceph_evict_inode(struct inode *inode) 687{ 688 struct ceph_inode_info *ci = ceph_inode(inode); 689 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 690 struct ceph_client *cl = ceph_inode_to_client(inode); 691 struct ceph_inode_frag *frag; 692 struct rb_node *n; 693 694 doutc(cl, "%p ino %llx.%llx\n", inode, ceph_vinop(inode)); 695 696 percpu_counter_dec(&mdsc->metric.total_inodes); 697 698 truncate_inode_pages_final(&inode->i_data); 699 if (inode->i_state & I_PINNING_NETFS_WB) 700 ceph_fscache_unuse_cookie(inode, true); 701 clear_inode(inode); 702 703 ceph_fscache_unregister_inode_cookie(ci); 704 fscrypt_put_encryption_info(inode); 705 706 __ceph_remove_caps(ci); 707 708 if (__ceph_has_quota(ci, QUOTA_GET_ANY)) 709 ceph_adjust_quota_realms_count(inode, false); 710 711 /* 712 * we may still have a snap_realm reference if there are stray 713 * caps in i_snap_caps. 714 */ 715 if (ci->i_snap_realm) { 716 if (ceph_snap(inode) == CEPH_NOSNAP) { 717 doutc(cl, " dropping residual ref to snap realm %p\n", 718 ci->i_snap_realm); 719 ceph_change_snap_realm(inode, NULL); 720 } else { 721 ceph_put_snapid_map(mdsc, ci->i_snapid_map); 722 ci->i_snap_realm = NULL; 723 } 724 } 725 726 while ((n = rb_first(&ci->i_fragtree)) != NULL) { 727 frag = rb_entry(n, struct ceph_inode_frag, node); 728 rb_erase(n, &ci->i_fragtree); 729 kfree(frag); 730 } 731 ci->i_fragtree_nsplits = 0; 732 733 __ceph_destroy_xattrs(ci); 734 if (ci->i_xattrs.blob) 735 ceph_buffer_put(ci->i_xattrs.blob); 736 if (ci->i_xattrs.prealloc_blob) 737 ceph_buffer_put(ci->i_xattrs.prealloc_blob); 738 739 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns)); 740 ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns)); 741} 742 743static inline blkcnt_t calc_inode_blocks(u64 size) 744{ 745 return (size + (1<<9) - 1) >> 9; 746} 747 748/* 749 * Helpers to fill in size, ctime, mtime, and atime. We have to be 750 * careful because either the client or MDS may have more up to date 751 * info, depending on which capabilities are held, and whether 752 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime 753 * and size are monotonically increasing, except when utimes() or 754 * truncate() increments the corresponding _seq values.) 755 */ 756int ceph_fill_file_size(struct inode *inode, int issued, 757 u32 truncate_seq, u64 truncate_size, u64 size) 758{ 759 struct ceph_client *cl = ceph_inode_to_client(inode); 760 struct ceph_inode_info *ci = ceph_inode(inode); 761 int queue_trunc = 0; 762 loff_t isize = i_size_read(inode); 763 764 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || 765 (truncate_seq == ci->i_truncate_seq && size > isize)) { 766 doutc(cl, "size %lld -> %llu\n", isize, size); 767 if (size > 0 && S_ISDIR(inode->i_mode)) { 768 pr_err_client(cl, "non-zero size for directory\n"); 769 size = 0; 770 } 771 i_size_write(inode, size); 772 inode->i_blocks = calc_inode_blocks(size); 773 /* 774 * If we're expanding, then we should be able to just update 775 * the existing cookie. 776 */ 777 if (size > isize) 778 ceph_fscache_update(inode); 779 ci->i_reported_size = size; 780 if (truncate_seq != ci->i_truncate_seq) { 781 doutc(cl, "truncate_seq %u -> %u\n", 782 ci->i_truncate_seq, truncate_seq); 783 ci->i_truncate_seq = truncate_seq; 784 785 /* the MDS should have revoked these caps */ 786 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_RD | 787 CEPH_CAP_FILE_LAZYIO)); 788 /* 789 * If we hold relevant caps, or in the case where we're 790 * not the only client referencing this file and we 791 * don't hold those caps, then we need to check whether 792 * the file is either opened or mmaped 793 */ 794 if ((issued & (CEPH_CAP_FILE_CACHE| 795 CEPH_CAP_FILE_BUFFER)) || 796 mapping_mapped(inode->i_mapping) || 797 __ceph_is_file_opened(ci)) { 798 ci->i_truncate_pending++; 799 queue_trunc = 1; 800 } 801 } 802 } 803 804 /* 805 * It's possible that the new sizes of the two consecutive 806 * size truncations will be in the same fscrypt last block, 807 * and we need to truncate the corresponding page caches 808 * anyway. 809 */ 810 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0) { 811 doutc(cl, "truncate_size %lld -> %llu, encrypted %d\n", 812 ci->i_truncate_size, truncate_size, 813 !!IS_ENCRYPTED(inode)); 814 815 ci->i_truncate_size = truncate_size; 816 817 if (IS_ENCRYPTED(inode)) { 818 doutc(cl, "truncate_pagecache_size %lld -> %llu\n", 819 ci->i_truncate_pagecache_size, size); 820 ci->i_truncate_pagecache_size = size; 821 } else { 822 ci->i_truncate_pagecache_size = truncate_size; 823 } 824 } 825 return queue_trunc; 826} 827 828void ceph_fill_file_time(struct inode *inode, int issued, 829 u64 time_warp_seq, struct timespec64 *ctime, 830 struct timespec64 *mtime, struct timespec64 *atime) 831{ 832 struct ceph_client *cl = ceph_inode_to_client(inode); 833 struct ceph_inode_info *ci = ceph_inode(inode); 834 struct timespec64 ictime = inode_get_ctime(inode); 835 int warn = 0; 836 837 if (issued & (CEPH_CAP_FILE_EXCL| 838 CEPH_CAP_FILE_WR| 839 CEPH_CAP_FILE_BUFFER| 840 CEPH_CAP_AUTH_EXCL| 841 CEPH_CAP_XATTR_EXCL)) { 842 if (ci->i_version == 0 || 843 timespec64_compare(ctime, &ictime) > 0) { 844 doutc(cl, "ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n", 845 ictime.tv_sec, ictime.tv_nsec, 846 ctime->tv_sec, ctime->tv_nsec); 847 inode_set_ctime_to_ts(inode, *ctime); 848 } 849 if (ci->i_version == 0 || 850 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { 851 /* the MDS did a utimes() */ 852 doutc(cl, "mtime %lld.%09ld -> %lld.%09ld tw %d -> %d\n", 853 inode_get_mtime_sec(inode), 854 inode_get_mtime_nsec(inode), 855 mtime->tv_sec, mtime->tv_nsec, 856 ci->i_time_warp_seq, (int)time_warp_seq); 857 858 inode_set_mtime_to_ts(inode, *mtime); 859 inode_set_atime_to_ts(inode, *atime); 860 ci->i_time_warp_seq = time_warp_seq; 861 } else if (time_warp_seq == ci->i_time_warp_seq) { 862 struct timespec64 ts; 863 864 /* nobody did utimes(); take the max */ 865 ts = inode_get_mtime(inode); 866 if (timespec64_compare(mtime, &ts) > 0) { 867 doutc(cl, "mtime %lld.%09ld -> %lld.%09ld inc\n", 868 ts.tv_sec, ts.tv_nsec, 869 mtime->tv_sec, mtime->tv_nsec); 870 inode_set_mtime_to_ts(inode, *mtime); 871 } 872 ts = inode_get_atime(inode); 873 if (timespec64_compare(atime, &ts) > 0) { 874 doutc(cl, "atime %lld.%09ld -> %lld.%09ld inc\n", 875 ts.tv_sec, ts.tv_nsec, 876 atime->tv_sec, atime->tv_nsec); 877 inode_set_atime_to_ts(inode, *atime); 878 } 879 } else if (issued & CEPH_CAP_FILE_EXCL) { 880 /* we did a utimes(); ignore mds values */ 881 } else { 882 warn = 1; 883 } 884 } else { 885 /* we have no write|excl caps; whatever the MDS says is true */ 886 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { 887 inode_set_ctime_to_ts(inode, *ctime); 888 inode_set_mtime_to_ts(inode, *mtime); 889 inode_set_atime_to_ts(inode, *atime); 890 ci->i_time_warp_seq = time_warp_seq; 891 } else { 892 warn = 1; 893 } 894 } 895 if (warn) /* time_warp_seq shouldn't go backwards */ 896 doutc(cl, "%p mds time_warp_seq %llu < %u\n", inode, 897 time_warp_seq, ci->i_time_warp_seq); 898} 899 900#if IS_ENABLED(CONFIG_FS_ENCRYPTION) 901static int decode_encrypted_symlink(struct ceph_mds_client *mdsc, 902 const char *encsym, 903 int enclen, u8 **decsym) 904{ 905 struct ceph_client *cl = mdsc->fsc->client; 906 int declen; 907 u8 *sym; 908 909 sym = kmalloc(enclen + 1, GFP_NOFS); 910 if (!sym) 911 return -ENOMEM; 912 913 declen = ceph_base64_decode(encsym, enclen, sym); 914 if (declen < 0) { 915 pr_err_client(cl, 916 "can't decode symlink (%d). Content: %.*s\n", 917 declen, enclen, encsym); 918 kfree(sym); 919 return -EIO; 920 } 921 sym[declen + 1] = '\0'; 922 *decsym = sym; 923 return declen; 924} 925#else 926static int decode_encrypted_symlink(struct ceph_mds_client *mdsc, 927 const char *encsym, 928 int symlen, u8 **decsym) 929{ 930 return -EOPNOTSUPP; 931} 932#endif 933 934/* 935 * Populate an inode based on info from mds. May be called on new or 936 * existing inodes. 937 */ 938int ceph_fill_inode(struct inode *inode, struct page *locked_page, 939 struct ceph_mds_reply_info_in *iinfo, 940 struct ceph_mds_reply_dirfrag *dirinfo, 941 struct ceph_mds_session *session, int cap_fmode, 942 struct ceph_cap_reservation *caps_reservation) 943{ 944 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); 945 struct ceph_client *cl = mdsc->fsc->client; 946 struct ceph_mds_reply_inode *info = iinfo->in; 947 struct ceph_inode_info *ci = ceph_inode(inode); 948 int issued, new_issued, info_caps; 949 struct timespec64 mtime, atime, ctime; 950 struct ceph_buffer *xattr_blob = NULL; 951 struct ceph_buffer *old_blob = NULL; 952 struct ceph_string *pool_ns = NULL; 953 struct ceph_cap *new_cap = NULL; 954 int err = 0; 955 bool wake = false; 956 bool queue_trunc = false; 957 bool new_version = false; 958 bool fill_inline = false; 959 umode_t mode = le32_to_cpu(info->mode); 960 dev_t rdev = le32_to_cpu(info->rdev); 961 962 lockdep_assert_held(&mdsc->snap_rwsem); 963 964 doutc(cl, "%p ino %llx.%llx v %llu had %llu\n", inode, ceph_vinop(inode), 965 le64_to_cpu(info->version), ci->i_version); 966 967 /* Once I_NEW is cleared, we can't change type or dev numbers */ 968 if (inode->i_state & I_NEW) { 969 inode->i_mode = mode; 970 } else { 971 if (inode_wrong_type(inode, mode)) { 972 pr_warn_once_client(cl, 973 "inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n", 974 ceph_vinop(inode), inode->i_mode, mode); 975 return -ESTALE; 976 } 977 978 if ((S_ISCHR(mode) || S_ISBLK(mode)) && inode->i_rdev != rdev) { 979 pr_warn_once_client(cl, 980 "dev inode rdev changed! (ino %llx.%llx is %u:%u, mds says %u:%u)\n", 981 ceph_vinop(inode), MAJOR(inode->i_rdev), 982 MINOR(inode->i_rdev), MAJOR(rdev), 983 MINOR(rdev)); 984 return -ESTALE; 985 } 986 } 987 988 info_caps = le32_to_cpu(info->cap.caps); 989 990 /* prealloc new cap struct */ 991 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) { 992 new_cap = ceph_get_cap(mdsc, caps_reservation); 993 if (!new_cap) 994 return -ENOMEM; 995 } 996 997 /* 998 * prealloc xattr data, if it looks like we'll need it. only 999 * if len > 4 (meaning there are actually xattrs; the first 4 1000 * bytes are the xattr count). 1001 */ 1002 if (iinfo->xattr_len > 4) { 1003 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); 1004 if (!xattr_blob) 1005 pr_err_client(cl, "ENOMEM xattr blob %d bytes\n", 1006 iinfo->xattr_len); 1007 } 1008 1009 if (iinfo->pool_ns_len > 0) 1010 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data, 1011 iinfo->pool_ns_len); 1012 1013 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map) 1014 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode)); 1015 1016 spin_lock(&ci->i_ceph_lock); 1017 1018 /* 1019 * provided version will be odd if inode value is projected, 1020 * even if stable. skip the update if we have newer stable 1021 * info (ours>=theirs, e.g. due to racing mds replies), unless 1022 * we are getting projected (unstable) info (in which case the 1023 * version is odd, and we want ours>theirs). 1024 * us them 1025 * 2 2 skip 1026 * 3 2 skip 1027 * 3 3 update 1028 */ 1029 if (ci->i_version == 0 || 1030 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 1031 le64_to_cpu(info->version) > (ci->i_version & ~1))) 1032 new_version = true; 1033 1034 /* Update change_attribute */ 1035 inode_set_max_iversion_raw(inode, iinfo->change_attr); 1036 1037 __ceph_caps_issued(ci, &issued); 1038 issued |= __ceph_caps_dirty(ci); 1039 new_issued = ~issued & info_caps; 1040 1041 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files); 1042 1043#ifdef CONFIG_FS_ENCRYPTION 1044 if (iinfo->fscrypt_auth_len && 1045 ((inode->i_state & I_NEW) || (ci->fscrypt_auth_len == 0))) { 1046 kfree(ci->fscrypt_auth); 1047 ci->fscrypt_auth_len = iinfo->fscrypt_auth_len; 1048 ci->fscrypt_auth = iinfo->fscrypt_auth; 1049 iinfo->fscrypt_auth = NULL; 1050 iinfo->fscrypt_auth_len = 0; 1051 inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED); 1052 } 1053#endif 1054 1055 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && 1056 (issued & CEPH_CAP_AUTH_EXCL) == 0) { 1057 inode->i_mode = mode; 1058 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid)); 1059 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid)); 1060 doutc(cl, "%p %llx.%llx mode 0%o uid.gid %d.%d\n", inode, 1061 ceph_vinop(inode), inode->i_mode, 1062 from_kuid(&init_user_ns, inode->i_uid), 1063 from_kgid(&init_user_ns, inode->i_gid)); 1064 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime); 1065 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime); 1066 } 1067 1068 /* directories have fl_stripe_unit set to zero */ 1069 if (IS_ENCRYPTED(inode)) 1070 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT; 1071 else if (le32_to_cpu(info->layout.fl_stripe_unit)) 1072 inode->i_blkbits = 1073 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; 1074 else 1075 inode->i_blkbits = CEPH_BLOCK_SHIFT; 1076 1077 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) && 1078 (issued & CEPH_CAP_LINK_EXCL) == 0) 1079 set_nlink(inode, le32_to_cpu(info->nlink)); 1080 1081 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) { 1082 /* be careful with mtime, atime, size */ 1083 ceph_decode_timespec64(&atime, &info->atime); 1084 ceph_decode_timespec64(&mtime, &info->mtime); 1085 ceph_decode_timespec64(&ctime, &info->ctime); 1086 ceph_fill_file_time(inode, issued, 1087 le32_to_cpu(info->time_warp_seq), 1088 &ctime, &mtime, &atime); 1089 } 1090 1091 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) { 1092 ci->i_files = le64_to_cpu(info->files); 1093 ci->i_subdirs = le64_to_cpu(info->subdirs); 1094 } 1095 1096 if (new_version || 1097 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) { 1098 u64 size = le64_to_cpu(info->size); 1099 s64 old_pool = ci->i_layout.pool_id; 1100 struct ceph_string *old_ns; 1101 1102 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout); 1103 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns, 1104 lockdep_is_held(&ci->i_ceph_lock)); 1105 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns); 1106 1107 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns) 1108 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM; 1109 1110 pool_ns = old_ns; 1111 1112 if (IS_ENCRYPTED(inode) && size && 1113 iinfo->fscrypt_file_len == sizeof(__le64)) { 1114 u64 fsize = __le64_to_cpu(*(__le64 *)iinfo->fscrypt_file); 1115 1116 if (size == round_up(fsize, CEPH_FSCRYPT_BLOCK_SIZE)) { 1117 size = fsize; 1118 } else { 1119 pr_warn_client(cl, 1120 "fscrypt size mismatch: size=%llu fscrypt_file=%llu, discarding fscrypt_file size.\n", 1121 info->size, size); 1122 } 1123 } 1124 1125 queue_trunc = ceph_fill_file_size(inode, issued, 1126 le32_to_cpu(info->truncate_seq), 1127 le64_to_cpu(info->truncate_size), 1128 size); 1129 /* only update max_size on auth cap */ 1130 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && 1131 ci->i_max_size != le64_to_cpu(info->max_size)) { 1132 doutc(cl, "max_size %lld -> %llu\n", 1133 ci->i_max_size, le64_to_cpu(info->max_size)); 1134 ci->i_max_size = le64_to_cpu(info->max_size); 1135 } 1136 } 1137 1138 /* layout and rstat are not tracked by capability, update them if 1139 * the inode info is from auth mds */ 1140 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) { 1141 if (S_ISDIR(inode->i_mode)) { 1142 ci->i_dir_layout = iinfo->dir_layout; 1143 ci->i_rbytes = le64_to_cpu(info->rbytes); 1144 ci->i_rfiles = le64_to_cpu(info->rfiles); 1145 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); 1146 ci->i_dir_pin = iinfo->dir_pin; 1147 ci->i_rsnaps = iinfo->rsnaps; 1148 ceph_decode_timespec64(&ci->i_rctime, &info->rctime); 1149 } 1150 } 1151 1152 /* xattrs */ 1153 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ 1154 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) && 1155 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { 1156 if (ci->i_xattrs.blob) 1157 old_blob = ci->i_xattrs.blob; 1158 ci->i_xattrs.blob = xattr_blob; 1159 if (xattr_blob) 1160 memcpy(ci->i_xattrs.blob->vec.iov_base, 1161 iinfo->xattr_data, iinfo->xattr_len); 1162 ci->i_xattrs.version = le64_to_cpu(info->xattr_version); 1163 ceph_forget_all_cached_acls(inode); 1164 ceph_security_invalidate_secctx(inode); 1165 xattr_blob = NULL; 1166 } 1167 1168 /* finally update i_version */ 1169 if (le64_to_cpu(info->version) > ci->i_version) 1170 ci->i_version = le64_to_cpu(info->version); 1171 1172 inode->i_mapping->a_ops = &ceph_aops; 1173 1174 switch (inode->i_mode & S_IFMT) { 1175 case S_IFIFO: 1176 case S_IFBLK: 1177 case S_IFCHR: 1178 case S_IFSOCK: 1179 inode->i_blkbits = PAGE_SHIFT; 1180 init_special_inode(inode, inode->i_mode, rdev); 1181 inode->i_op = &ceph_file_iops; 1182 break; 1183 case S_IFREG: 1184 inode->i_op = &ceph_file_iops; 1185 inode->i_fop = &ceph_file_fops; 1186 break; 1187 case S_IFLNK: 1188 if (!ci->i_symlink) { 1189 u32 symlen = iinfo->symlink_len; 1190 char *sym; 1191 1192 spin_unlock(&ci->i_ceph_lock); 1193 1194 if (IS_ENCRYPTED(inode)) { 1195 if (symlen != i_size_read(inode)) 1196 pr_err_client(cl, 1197 "%p %llx.%llx BAD symlink size %lld\n", 1198 inode, ceph_vinop(inode), 1199 i_size_read(inode)); 1200 1201 err = decode_encrypted_symlink(mdsc, iinfo->symlink, 1202 symlen, (u8 **)&sym); 1203 if (err < 0) { 1204 pr_err_client(cl, 1205 "decoding encrypted symlink failed: %d\n", 1206 err); 1207 goto out; 1208 } 1209 symlen = err; 1210 i_size_write(inode, symlen); 1211 inode->i_blocks = calc_inode_blocks(symlen); 1212 } else { 1213 if (symlen != i_size_read(inode)) { 1214 pr_err_client(cl, 1215 "%p %llx.%llx BAD symlink size %lld\n", 1216 inode, ceph_vinop(inode), 1217 i_size_read(inode)); 1218 i_size_write(inode, symlen); 1219 inode->i_blocks = calc_inode_blocks(symlen); 1220 } 1221 1222 err = -ENOMEM; 1223 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS); 1224 if (!sym) 1225 goto out; 1226 } 1227 1228 spin_lock(&ci->i_ceph_lock); 1229 if (!ci->i_symlink) 1230 ci->i_symlink = sym; 1231 else 1232 kfree(sym); /* lost a race */ 1233 } 1234 1235 if (IS_ENCRYPTED(inode)) { 1236 /* 1237 * Encrypted symlinks need to be decrypted before we can 1238 * cache their targets in i_link. Don't touch it here. 1239 */ 1240 inode->i_op = &ceph_encrypted_symlink_iops; 1241 } else { 1242 inode->i_link = ci->i_symlink; 1243 inode->i_op = &ceph_symlink_iops; 1244 } 1245 break; 1246 case S_IFDIR: 1247 inode->i_op = &ceph_dir_iops; 1248 inode->i_fop = &ceph_dir_fops; 1249 break; 1250 default: 1251 pr_err_client(cl, "%p %llx.%llx BAD mode 0%o\n", inode, 1252 ceph_vinop(inode), inode->i_mode); 1253 } 1254 1255 /* were we issued a capability? */ 1256 if (info_caps) { 1257 if (ceph_snap(inode) == CEPH_NOSNAP) { 1258 ceph_add_cap(inode, session, 1259 le64_to_cpu(info->cap.cap_id), 1260 info_caps, 1261 le32_to_cpu(info->cap.wanted), 1262 le32_to_cpu(info->cap.seq), 1263 le32_to_cpu(info->cap.mseq), 1264 le64_to_cpu(info->cap.realm), 1265 info->cap.flags, &new_cap); 1266 1267 /* set dir completion flag? */ 1268 if (S_ISDIR(inode->i_mode) && 1269 ci->i_files == 0 && ci->i_subdirs == 0 && 1270 (info_caps & CEPH_CAP_FILE_SHARED) && 1271 (issued & CEPH_CAP_FILE_EXCL) == 0 && 1272 !__ceph_dir_is_complete(ci)) { 1273 doutc(cl, " marking %p complete (empty)\n", 1274 inode); 1275 i_size_write(inode, 0); 1276 __ceph_dir_set_complete(ci, 1277 atomic64_read(&ci->i_release_count), 1278 atomic64_read(&ci->i_ordered_count)); 1279 } 1280 1281 wake = true; 1282 } else { 1283 doutc(cl, " %p got snap_caps %s\n", inode, 1284 ceph_cap_string(info_caps)); 1285 ci->i_snap_caps |= info_caps; 1286 } 1287 } 1288 1289 if (iinfo->inline_version > 0 && 1290 iinfo->inline_version >= ci->i_inline_version) { 1291 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; 1292 ci->i_inline_version = iinfo->inline_version; 1293 if (ceph_has_inline_data(ci) && 1294 (locked_page || (info_caps & cache_caps))) 1295 fill_inline = true; 1296 } 1297 1298 if (cap_fmode >= 0) { 1299 if (!info_caps) 1300 pr_warn_client(cl, "mds issued no caps on %llx.%llx\n", 1301 ceph_vinop(inode)); 1302 __ceph_touch_fmode(ci, mdsc, cap_fmode); 1303 } 1304 1305 spin_unlock(&ci->i_ceph_lock); 1306 1307 ceph_fscache_register_inode_cookie(inode); 1308 1309 if (fill_inline) 1310 ceph_fill_inline_data(inode, locked_page, 1311 iinfo->inline_data, iinfo->inline_len); 1312 1313 if (wake) 1314 wake_up_all(&ci->i_cap_wq); 1315 1316 /* queue truncate if we saw i_size decrease */ 1317 if (queue_trunc) 1318 ceph_queue_vmtruncate(inode); 1319 1320 /* populate frag tree */ 1321 if (S_ISDIR(inode->i_mode)) 1322 ceph_fill_fragtree(inode, &info->fragtree, dirinfo); 1323 1324 /* update delegation info? */ 1325 if (dirinfo) 1326 ceph_fill_dirfrag(inode, dirinfo); 1327 1328 err = 0; 1329out: 1330 if (new_cap) 1331 ceph_put_cap(mdsc, new_cap); 1332 ceph_buffer_put(old_blob); 1333 ceph_buffer_put(xattr_blob); 1334 ceph_put_string(pool_ns); 1335 return err; 1336} 1337 1338/* 1339 * caller should hold session s_mutex and dentry->d_lock. 1340 */ 1341static void __update_dentry_lease(struct inode *dir, struct dentry *dentry, 1342 struct ceph_mds_reply_lease *lease, 1343 struct ceph_mds_session *session, 1344 unsigned long from_time, 1345 struct ceph_mds_session **old_lease_session) 1346{ 1347 struct ceph_client *cl = ceph_inode_to_client(dir); 1348 struct ceph_dentry_info *di = ceph_dentry(dentry); 1349 unsigned mask = le16_to_cpu(lease->mask); 1350 long unsigned duration = le32_to_cpu(lease->duration_ms); 1351 long unsigned ttl = from_time + (duration * HZ) / 1000; 1352 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; 1353 1354 doutc(cl, "%p duration %lu ms ttl %lu\n", dentry, duration, ttl); 1355 1356 /* only track leases on regular dentries */ 1357 if (ceph_snap(dir) != CEPH_NOSNAP) 1358 return; 1359 1360 if (mask & CEPH_LEASE_PRIMARY_LINK) 1361 di->flags |= CEPH_DENTRY_PRIMARY_LINK; 1362 else 1363 di->flags &= ~CEPH_DENTRY_PRIMARY_LINK; 1364 1365 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen); 1366 if (!(mask & CEPH_LEASE_VALID)) { 1367 __ceph_dentry_dir_lease_touch(di); 1368 return; 1369 } 1370 1371 if (di->lease_gen == atomic_read(&session->s_cap_gen) && 1372 time_before(ttl, di->time)) 1373 return; /* we already have a newer lease. */ 1374 1375 if (di->lease_session && di->lease_session != session) { 1376 *old_lease_session = di->lease_session; 1377 di->lease_session = NULL; 1378 } 1379 1380 if (!di->lease_session) 1381 di->lease_session = ceph_get_mds_session(session); 1382 di->lease_gen = atomic_read(&session->s_cap_gen); 1383 di->lease_seq = le32_to_cpu(lease->seq); 1384 di->lease_renew_after = half_ttl; 1385 di->lease_renew_from = 0; 1386 di->time = ttl; 1387 1388 __ceph_dentry_lease_touch(di); 1389} 1390 1391static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry, 1392 struct ceph_mds_reply_lease *lease, 1393 struct ceph_mds_session *session, 1394 unsigned long from_time) 1395{ 1396 struct ceph_mds_session *old_lease_session = NULL; 1397 spin_lock(&dentry->d_lock); 1398 __update_dentry_lease(dir, dentry, lease, session, from_time, 1399 &old_lease_session); 1400 spin_unlock(&dentry->d_lock); 1401 ceph_put_mds_session(old_lease_session); 1402} 1403 1404/* 1405 * update dentry lease without having parent inode locked 1406 */ 1407static void update_dentry_lease_careful(struct dentry *dentry, 1408 struct ceph_mds_reply_lease *lease, 1409 struct ceph_mds_session *session, 1410 unsigned long from_time, 1411 char *dname, u32 dname_len, 1412 struct ceph_vino *pdvino, 1413 struct ceph_vino *ptvino) 1414 1415{ 1416 struct inode *dir; 1417 struct ceph_mds_session *old_lease_session = NULL; 1418 1419 spin_lock(&dentry->d_lock); 1420 /* make sure dentry's name matches target */ 1421 if (dentry->d_name.len != dname_len || 1422 memcmp(dentry->d_name.name, dname, dname_len)) 1423 goto out_unlock; 1424 1425 dir = d_inode(dentry->d_parent); 1426 /* make sure parent matches dvino */ 1427 if (!ceph_ino_compare(dir, pdvino)) 1428 goto out_unlock; 1429 1430 /* make sure dentry's inode matches target. NULL ptvino means that 1431 * we expect a negative dentry */ 1432 if (ptvino) { 1433 if (d_really_is_negative(dentry)) 1434 goto out_unlock; 1435 if (!ceph_ino_compare(d_inode(dentry), ptvino)) 1436 goto out_unlock; 1437 } else { 1438 if (d_really_is_positive(dentry)) 1439 goto out_unlock; 1440 } 1441 1442 __update_dentry_lease(dir, dentry, lease, session, 1443 from_time, &old_lease_session); 1444out_unlock: 1445 spin_unlock(&dentry->d_lock); 1446 ceph_put_mds_session(old_lease_session); 1447} 1448 1449/* 1450 * splice a dentry to an inode. 1451 * caller must hold directory i_rwsem for this to be safe. 1452 */ 1453static int splice_dentry(struct dentry **pdn, struct inode *in) 1454{ 1455 struct ceph_client *cl = ceph_inode_to_client(in); 1456 struct dentry *dn = *pdn; 1457 struct dentry *realdn; 1458 1459 BUG_ON(d_inode(dn)); 1460 1461 if (S_ISDIR(in->i_mode)) { 1462 /* If inode is directory, d_splice_alias() below will remove 1463 * 'realdn' from its origin parent. We need to ensure that 1464 * origin parent's readdir cache will not reference 'realdn' 1465 */ 1466 realdn = d_find_any_alias(in); 1467 if (realdn) { 1468 struct ceph_dentry_info *di = ceph_dentry(realdn); 1469 spin_lock(&realdn->d_lock); 1470 1471 realdn->d_op->d_prune(realdn); 1472 1473 di->time = jiffies; 1474 di->lease_shared_gen = 0; 1475 di->offset = 0; 1476 1477 spin_unlock(&realdn->d_lock); 1478 dput(realdn); 1479 } 1480 } 1481 1482 /* dn must be unhashed */ 1483 if (!d_unhashed(dn)) 1484 d_drop(dn); 1485 realdn = d_splice_alias(in, dn); 1486 if (IS_ERR(realdn)) { 1487 pr_err_client(cl, "error %ld %p inode %p ino %llx.%llx\n", 1488 PTR_ERR(realdn), dn, in, ceph_vinop(in)); 1489 return PTR_ERR(realdn); 1490 } 1491 1492 if (realdn) { 1493 doutc(cl, "dn %p (%d) spliced with %p (%d) inode %p ino %llx.%llx\n", 1494 dn, d_count(dn), realdn, d_count(realdn), 1495 d_inode(realdn), ceph_vinop(d_inode(realdn))); 1496 dput(dn); 1497 *pdn = realdn; 1498 } else { 1499 BUG_ON(!ceph_dentry(dn)); 1500 doutc(cl, "dn %p attached to %p ino %llx.%llx\n", dn, 1501 d_inode(dn), ceph_vinop(d_inode(dn))); 1502 } 1503 return 0; 1504} 1505 1506/* 1507 * Incorporate results into the local cache. This is either just 1508 * one inode, or a directory, dentry, and possibly linked-to inode (e.g., 1509 * after a lookup). 1510 * 1511 * A reply may contain 1512 * a directory inode along with a dentry. 1513 * and/or a target inode 1514 * 1515 * Called with snap_rwsem (read). 1516 */ 1517int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req) 1518{ 1519 struct ceph_mds_session *session = req->r_session; 1520 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1521 struct inode *in = NULL; 1522 struct ceph_vino tvino, dvino; 1523 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb); 1524 struct ceph_client *cl = fsc->client; 1525 int err = 0; 1526 1527 doutc(cl, "%p is_dentry %d is_target %d\n", req, 1528 rinfo->head->is_dentry, rinfo->head->is_target); 1529 1530 if (!rinfo->head->is_target && !rinfo->head->is_dentry) { 1531 doutc(cl, "reply is empty!\n"); 1532 if (rinfo->head->result == 0 && req->r_parent) 1533 ceph_invalidate_dir_request(req); 1534 return 0; 1535 } 1536 1537 if (rinfo->head->is_dentry) { 1538 struct inode *dir = req->r_parent; 1539 1540 if (dir) { 1541 err = ceph_fill_inode(dir, NULL, &rinfo->diri, 1542 rinfo->dirfrag, session, -1, 1543 &req->r_caps_reservation); 1544 if (err < 0) 1545 goto done; 1546 } else { 1547 WARN_ON_ONCE(1); 1548 } 1549 1550 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME && 1551 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1552 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1553 bool is_nokey = false; 1554 struct qstr dname; 1555 struct dentry *dn, *parent; 1556 struct fscrypt_str oname = FSTR_INIT(NULL, 0); 1557 struct ceph_fname fname = { .dir = dir, 1558 .name = rinfo->dname, 1559 .ctext = rinfo->altname, 1560 .name_len = rinfo->dname_len, 1561 .ctext_len = rinfo->altname_len }; 1562 1563 BUG_ON(!rinfo->head->is_target); 1564 BUG_ON(req->r_dentry); 1565 1566 parent = d_find_any_alias(dir); 1567 BUG_ON(!parent); 1568 1569 err = ceph_fname_alloc_buffer(dir, &oname); 1570 if (err < 0) { 1571 dput(parent); 1572 goto done; 1573 } 1574 1575 err = ceph_fname_to_usr(&fname, NULL, &oname, &is_nokey); 1576 if (err < 0) { 1577 dput(parent); 1578 ceph_fname_free_buffer(dir, &oname); 1579 goto done; 1580 } 1581 dname.name = oname.name; 1582 dname.len = oname.len; 1583 dname.hash = full_name_hash(parent, dname.name, dname.len); 1584 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1585 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1586retry_lookup: 1587 dn = d_lookup(parent, &dname); 1588 doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n", 1589 parent, dname.len, dname.name, dn); 1590 1591 if (!dn) { 1592 dn = d_alloc(parent, &dname); 1593 doutc(cl, "d_alloc %p '%.*s' = %p\n", parent, 1594 dname.len, dname.name, dn); 1595 if (!dn) { 1596 dput(parent); 1597 ceph_fname_free_buffer(dir, &oname); 1598 err = -ENOMEM; 1599 goto done; 1600 } 1601 if (is_nokey) { 1602 spin_lock(&dn->d_lock); 1603 dn->d_flags |= DCACHE_NOKEY_NAME; 1604 spin_unlock(&dn->d_lock); 1605 } 1606 err = 0; 1607 } else if (d_really_is_positive(dn) && 1608 (ceph_ino(d_inode(dn)) != tvino.ino || 1609 ceph_snap(d_inode(dn)) != tvino.snap)) { 1610 doutc(cl, " dn %p points to wrong inode %p\n", 1611 dn, d_inode(dn)); 1612 ceph_dir_clear_ordered(dir); 1613 d_delete(dn); 1614 dput(dn); 1615 goto retry_lookup; 1616 } 1617 ceph_fname_free_buffer(dir, &oname); 1618 1619 req->r_dentry = dn; 1620 dput(parent); 1621 } 1622 } 1623 1624 if (rinfo->head->is_target) { 1625 /* Should be filled in by handle_reply */ 1626 BUG_ON(!req->r_target_inode); 1627 1628 in = req->r_target_inode; 1629 err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti, 1630 NULL, session, 1631 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1632 !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) && 1633 rinfo->head->result == 0) ? req->r_fmode : -1, 1634 &req->r_caps_reservation); 1635 if (err < 0) { 1636 pr_err_client(cl, "badness %p %llx.%llx\n", in, 1637 ceph_vinop(in)); 1638 req->r_target_inode = NULL; 1639 if (in->i_state & I_NEW) 1640 discard_new_inode(in); 1641 else 1642 iput(in); 1643 goto done; 1644 } 1645 if (in->i_state & I_NEW) 1646 unlock_new_inode(in); 1647 } 1648 1649 /* 1650 * ignore null lease/binding on snapdir ENOENT, or else we 1651 * will have trouble splicing in the virtual snapdir later 1652 */ 1653 if (rinfo->head->is_dentry && 1654 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) && 1655 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1656 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, 1657 fsc->mount_options->snapdir_name, 1658 req->r_dentry->d_name.len))) { 1659 /* 1660 * lookup link rename : null -> possibly existing inode 1661 * mknod symlink mkdir : null -> new inode 1662 * unlink : linked -> null 1663 */ 1664 struct inode *dir = req->r_parent; 1665 struct dentry *dn = req->r_dentry; 1666 bool have_dir_cap, have_lease; 1667 1668 BUG_ON(!dn); 1669 BUG_ON(!dir); 1670 BUG_ON(d_inode(dn->d_parent) != dir); 1671 1672 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1673 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1674 1675 BUG_ON(ceph_ino(dir) != dvino.ino); 1676 BUG_ON(ceph_snap(dir) != dvino.snap); 1677 1678 /* do we have a lease on the whole dir? */ 1679 have_dir_cap = 1680 (le32_to_cpu(rinfo->diri.in->cap.caps) & 1681 CEPH_CAP_FILE_SHARED); 1682 1683 /* do we have a dn lease? */ 1684 have_lease = have_dir_cap || 1685 le32_to_cpu(rinfo->dlease->duration_ms); 1686 if (!have_lease) 1687 doutc(cl, "no dentry lease or dir cap\n"); 1688 1689 /* rename? */ 1690 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { 1691 struct inode *olddir = req->r_old_dentry_dir; 1692 BUG_ON(!olddir); 1693 1694 doutc(cl, " src %p '%pd' dst %p '%pd'\n", 1695 req->r_old_dentry, req->r_old_dentry, dn, dn); 1696 doutc(cl, "doing d_move %p -> %p\n", req->r_old_dentry, dn); 1697 1698 /* d_move screws up sibling dentries' offsets */ 1699 ceph_dir_clear_ordered(dir); 1700 ceph_dir_clear_ordered(olddir); 1701 1702 d_move(req->r_old_dentry, dn); 1703 doutc(cl, " src %p '%pd' dst %p '%pd'\n", 1704 req->r_old_dentry, req->r_old_dentry, dn, dn); 1705 1706 /* ensure target dentry is invalidated, despite 1707 rehashing bug in vfs_rename_dir */ 1708 ceph_invalidate_dentry_lease(dn); 1709 1710 doutc(cl, "dn %p gets new offset %lld\n", 1711 req->r_old_dentry, 1712 ceph_dentry(req->r_old_dentry)->offset); 1713 1714 /* swap r_dentry and r_old_dentry in case that 1715 * splice_dentry() gets called later. This is safe 1716 * because no other place will use them */ 1717 req->r_dentry = req->r_old_dentry; 1718 req->r_old_dentry = dn; 1719 dn = req->r_dentry; 1720 } 1721 1722 /* null dentry? */ 1723 if (!rinfo->head->is_target) { 1724 doutc(cl, "null dentry\n"); 1725 if (d_really_is_positive(dn)) { 1726 doutc(cl, "d_delete %p\n", dn); 1727 ceph_dir_clear_ordered(dir); 1728 d_delete(dn); 1729 } else if (have_lease) { 1730 if (d_unhashed(dn)) 1731 d_add(dn, NULL); 1732 } 1733 1734 if (!d_unhashed(dn) && have_lease) 1735 update_dentry_lease(dir, dn, 1736 rinfo->dlease, session, 1737 req->r_request_started); 1738 goto done; 1739 } 1740 1741 /* attach proper inode */ 1742 if (d_really_is_negative(dn)) { 1743 ceph_dir_clear_ordered(dir); 1744 ihold(in); 1745 err = splice_dentry(&req->r_dentry, in); 1746 if (err < 0) 1747 goto done; 1748 dn = req->r_dentry; /* may have spliced */ 1749 } else if (d_really_is_positive(dn) && d_inode(dn) != in) { 1750 doutc(cl, " %p links to %p %llx.%llx, not %llx.%llx\n", 1751 dn, d_inode(dn), ceph_vinop(d_inode(dn)), 1752 ceph_vinop(in)); 1753 d_invalidate(dn); 1754 have_lease = false; 1755 } 1756 1757 if (have_lease) { 1758 update_dentry_lease(dir, dn, 1759 rinfo->dlease, session, 1760 req->r_request_started); 1761 } 1762 doutc(cl, " final dn %p\n", dn); 1763 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP || 1764 req->r_op == CEPH_MDS_OP_MKSNAP) && 1765 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) && 1766 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { 1767 struct inode *dir = req->r_parent; 1768 1769 /* fill out a snapdir LOOKUPSNAP dentry */ 1770 BUG_ON(!dir); 1771 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); 1772 BUG_ON(!req->r_dentry); 1773 doutc(cl, " linking snapped dir %p to dn %p\n", in, 1774 req->r_dentry); 1775 ceph_dir_clear_ordered(dir); 1776 ihold(in); 1777 err = splice_dentry(&req->r_dentry, in); 1778 if (err < 0) 1779 goto done; 1780 } else if (rinfo->head->is_dentry && req->r_dentry) { 1781 /* parent inode is not locked, be carefull */ 1782 struct ceph_vino *ptvino = NULL; 1783 dvino.ino = le64_to_cpu(rinfo->diri.in->ino); 1784 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid); 1785 if (rinfo->head->is_target) { 1786 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino); 1787 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid); 1788 ptvino = &tvino; 1789 } 1790 update_dentry_lease_careful(req->r_dentry, rinfo->dlease, 1791 session, req->r_request_started, 1792 rinfo->dname, rinfo->dname_len, 1793 &dvino, ptvino); 1794 } 1795done: 1796 doutc(cl, "done err=%d\n", err); 1797 return err; 1798} 1799 1800/* 1801 * Prepopulate our cache with readdir results, leases, etc. 1802 */ 1803static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req, 1804 struct ceph_mds_session *session) 1805{ 1806 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1807 struct ceph_client *cl = session->s_mdsc->fsc->client; 1808 int i, err = 0; 1809 1810 for (i = 0; i < rinfo->dir_nr; i++) { 1811 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1812 struct ceph_vino vino; 1813 struct inode *in; 1814 int rc; 1815 1816 vino.ino = le64_to_cpu(rde->inode.in->ino); 1817 vino.snap = le64_to_cpu(rde->inode.in->snapid); 1818 1819 in = ceph_get_inode(req->r_dentry->d_sb, vino, NULL); 1820 if (IS_ERR(in)) { 1821 err = PTR_ERR(in); 1822 doutc(cl, "badness got %d\n", err); 1823 continue; 1824 } 1825 rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 1826 -1, &req->r_caps_reservation); 1827 if (rc < 0) { 1828 pr_err_client(cl, "inode badness on %p got %d\n", in, 1829 rc); 1830 err = rc; 1831 if (in->i_state & I_NEW) { 1832 ihold(in); 1833 discard_new_inode(in); 1834 } 1835 } else if (in->i_state & I_NEW) { 1836 unlock_new_inode(in); 1837 } 1838 1839 iput(in); 1840 } 1841 1842 return err; 1843} 1844 1845void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl) 1846{ 1847 if (ctl->page) { 1848 kunmap(ctl->page); 1849 put_page(ctl->page); 1850 ctl->page = NULL; 1851 } 1852} 1853 1854static int fill_readdir_cache(struct inode *dir, struct dentry *dn, 1855 struct ceph_readdir_cache_control *ctl, 1856 struct ceph_mds_request *req) 1857{ 1858 struct ceph_client *cl = ceph_inode_to_client(dir); 1859 struct ceph_inode_info *ci = ceph_inode(dir); 1860 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*); 1861 unsigned idx = ctl->index % nsize; 1862 pgoff_t pgoff = ctl->index / nsize; 1863 1864 if (!ctl->page || pgoff != page_index(ctl->page)) { 1865 ceph_readdir_cache_release(ctl); 1866 if (idx == 0) 1867 ctl->page = grab_cache_page(&dir->i_data, pgoff); 1868 else 1869 ctl->page = find_lock_page(&dir->i_data, pgoff); 1870 if (!ctl->page) { 1871 ctl->index = -1; 1872 return idx == 0 ? -ENOMEM : 0; 1873 } 1874 /* reading/filling the cache are serialized by 1875 * i_rwsem, no need to use page lock */ 1876 unlock_page(ctl->page); 1877 ctl->dentries = kmap(ctl->page); 1878 if (idx == 0) 1879 memset(ctl->dentries, 0, PAGE_SIZE); 1880 } 1881 1882 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) && 1883 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) { 1884 doutc(cl, "dn %p idx %d\n", dn, ctl->index); 1885 ctl->dentries[idx] = dn; 1886 ctl->index++; 1887 } else { 1888 doutc(cl, "disable readdir cache\n"); 1889 ctl->index = -1; 1890 } 1891 return 0; 1892} 1893 1894int ceph_readdir_prepopulate(struct ceph_mds_request *req, 1895 struct ceph_mds_session *session) 1896{ 1897 struct dentry *parent = req->r_dentry; 1898 struct inode *inode = d_inode(parent); 1899 struct ceph_inode_info *ci = ceph_inode(inode); 1900 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; 1901 struct ceph_client *cl = session->s_mdsc->fsc->client; 1902 struct qstr dname; 1903 struct dentry *dn; 1904 struct inode *in; 1905 int err = 0, skipped = 0, ret, i; 1906 u32 frag = le32_to_cpu(req->r_args.readdir.frag); 1907 u32 last_hash = 0; 1908 u32 fpos_offset; 1909 struct ceph_readdir_cache_control cache_ctl = {}; 1910 1911 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) 1912 return readdir_prepopulate_inodes_only(req, session); 1913 1914 if (rinfo->hash_order) { 1915 if (req->r_path2) { 1916 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash, 1917 req->r_path2, 1918 strlen(req->r_path2)); 1919 last_hash = ceph_frag_value(last_hash); 1920 } else if (rinfo->offset_hash) { 1921 /* mds understands offset_hash */ 1922 WARN_ON_ONCE(req->r_readdir_offset != 2); 1923 last_hash = le32_to_cpu(req->r_args.readdir.offset_hash); 1924 } 1925 } 1926 1927 if (rinfo->dir_dir && 1928 le32_to_cpu(rinfo->dir_dir->frag) != frag) { 1929 doutc(cl, "got new frag %x -> %x\n", frag, 1930 le32_to_cpu(rinfo->dir_dir->frag)); 1931 frag = le32_to_cpu(rinfo->dir_dir->frag); 1932 if (!rinfo->hash_order) 1933 req->r_readdir_offset = 2; 1934 } 1935 1936 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { 1937 doutc(cl, "%d items under SNAPDIR dn %p\n", 1938 rinfo->dir_nr, parent); 1939 } else { 1940 doutc(cl, "%d items under dn %p\n", rinfo->dir_nr, parent); 1941 if (rinfo->dir_dir) 1942 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir); 1943 1944 if (ceph_frag_is_leftmost(frag) && 1945 req->r_readdir_offset == 2 && 1946 !(rinfo->hash_order && last_hash)) { 1947 /* note dir version at start of readdir so we can 1948 * tell if any dentries get dropped */ 1949 req->r_dir_release_cnt = 1950 atomic64_read(&ci->i_release_count); 1951 req->r_dir_ordered_cnt = 1952 atomic64_read(&ci->i_ordered_count); 1953 req->r_readdir_cache_idx = 0; 1954 } 1955 } 1956 1957 cache_ctl.index = req->r_readdir_cache_idx; 1958 fpos_offset = req->r_readdir_offset; 1959 1960 /* FIXME: release caps/leases if error occurs */ 1961 for (i = 0; i < rinfo->dir_nr; i++) { 1962 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i; 1963 struct ceph_vino tvino; 1964 1965 dname.name = rde->name; 1966 dname.len = rde->name_len; 1967 dname.hash = full_name_hash(parent, dname.name, dname.len); 1968 1969 tvino.ino = le64_to_cpu(rde->inode.in->ino); 1970 tvino.snap = le64_to_cpu(rde->inode.in->snapid); 1971 1972 if (rinfo->hash_order) { 1973 u32 hash = ceph_frag_value(rde->raw_hash); 1974 if (hash != last_hash) 1975 fpos_offset = 2; 1976 last_hash = hash; 1977 rde->offset = ceph_make_fpos(hash, fpos_offset++, true); 1978 } else { 1979 rde->offset = ceph_make_fpos(frag, fpos_offset++, false); 1980 } 1981 1982retry_lookup: 1983 dn = d_lookup(parent, &dname); 1984 doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n", 1985 parent, dname.len, dname.name, dn); 1986 1987 if (!dn) { 1988 dn = d_alloc(parent, &dname); 1989 doutc(cl, "d_alloc %p '%.*s' = %p\n", parent, 1990 dname.len, dname.name, dn); 1991 if (!dn) { 1992 doutc(cl, "d_alloc badness\n"); 1993 err = -ENOMEM; 1994 goto out; 1995 } 1996 if (rde->is_nokey) { 1997 spin_lock(&dn->d_lock); 1998 dn->d_flags |= DCACHE_NOKEY_NAME; 1999 spin_unlock(&dn->d_lock); 2000 } 2001 } else if (d_really_is_positive(dn) && 2002 (ceph_ino(d_inode(dn)) != tvino.ino || 2003 ceph_snap(d_inode(dn)) != tvino.snap)) { 2004 struct ceph_dentry_info *di = ceph_dentry(dn); 2005 doutc(cl, " dn %p points to wrong inode %p\n", 2006 dn, d_inode(dn)); 2007 2008 spin_lock(&dn->d_lock); 2009 if (di->offset > 0 && 2010 di->lease_shared_gen == 2011 atomic_read(&ci->i_shared_gen)) { 2012 __ceph_dir_clear_ordered(ci); 2013 di->offset = 0; 2014 } 2015 spin_unlock(&dn->d_lock); 2016 2017 d_delete(dn); 2018 dput(dn); 2019 goto retry_lookup; 2020 } 2021 2022 /* inode */ 2023 if (d_really_is_positive(dn)) { 2024 in = d_inode(dn); 2025 } else { 2026 in = ceph_get_inode(parent->d_sb, tvino, NULL); 2027 if (IS_ERR(in)) { 2028 doutc(cl, "new_inode badness\n"); 2029 d_drop(dn); 2030 dput(dn); 2031 err = PTR_ERR(in); 2032 goto out; 2033 } 2034 } 2035 2036 ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session, 2037 -1, &req->r_caps_reservation); 2038 if (ret < 0) { 2039 pr_err_client(cl, "badness on %p %llx.%llx\n", in, 2040 ceph_vinop(in)); 2041 if (d_really_is_negative(dn)) { 2042 if (in->i_state & I_NEW) { 2043 ihold(in); 2044 discard_new_inode(in); 2045 } 2046 iput(in); 2047 } 2048 d_drop(dn); 2049 err = ret; 2050 goto next_item; 2051 } 2052 if (in->i_state & I_NEW) 2053 unlock_new_inode(in); 2054 2055 if (d_really_is_negative(dn)) { 2056 if (ceph_security_xattr_deadlock(in)) { 2057 doutc(cl, " skip splicing dn %p to inode %p" 2058 " (security xattr deadlock)\n", dn, in); 2059 iput(in); 2060 skipped++; 2061 goto next_item; 2062 } 2063 2064 err = splice_dentry(&dn, in); 2065 if (err < 0) 2066 goto next_item; 2067 } 2068 2069 ceph_dentry(dn)->offset = rde->offset; 2070 2071 update_dentry_lease(d_inode(parent), dn, 2072 rde->lease, req->r_session, 2073 req->r_request_started); 2074 2075 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) { 2076 ret = fill_readdir_cache(d_inode(parent), dn, 2077 &cache_ctl, req); 2078 if (ret < 0) 2079 err = ret; 2080 } 2081next_item: 2082 dput(dn); 2083 } 2084out: 2085 if (err == 0 && skipped == 0) { 2086 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags); 2087 req->r_readdir_cache_idx = cache_ctl.index; 2088 } 2089 ceph_readdir_cache_release(&cache_ctl); 2090 doutc(cl, "done\n"); 2091 return err; 2092} 2093 2094bool ceph_inode_set_size(struct inode *inode, loff_t size) 2095{ 2096 struct ceph_client *cl = ceph_inode_to_client(inode); 2097 struct ceph_inode_info *ci = ceph_inode(inode); 2098 bool ret; 2099 2100 spin_lock(&ci->i_ceph_lock); 2101 doutc(cl, "set_size %p %llu -> %llu\n", inode, i_size_read(inode), size); 2102 i_size_write(inode, size); 2103 ceph_fscache_update(inode); 2104 inode->i_blocks = calc_inode_blocks(size); 2105 2106 ret = __ceph_should_report_size(ci); 2107 2108 spin_unlock(&ci->i_ceph_lock); 2109 2110 return ret; 2111} 2112 2113void ceph_queue_inode_work(struct inode *inode, int work_bit) 2114{ 2115 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); 2116 struct ceph_client *cl = fsc->client; 2117 struct ceph_inode_info *ci = ceph_inode(inode); 2118 set_bit(work_bit, &ci->i_work_mask); 2119 2120 ihold(inode); 2121 if (queue_work(fsc->inode_wq, &ci->i_work)) { 2122 doutc(cl, "%p %llx.%llx mask=%lx\n", inode, 2123 ceph_vinop(inode), ci->i_work_mask); 2124 } else { 2125 doutc(cl, "%p %llx.%llx already queued, mask=%lx\n", 2126 inode, ceph_vinop(inode), ci->i_work_mask); 2127 iput(inode); 2128 } 2129} 2130 2131static void ceph_do_invalidate_pages(struct inode *inode) 2132{ 2133 struct ceph_client *cl = ceph_inode_to_client(inode); 2134 struct ceph_inode_info *ci = ceph_inode(inode); 2135 u32 orig_gen; 2136 int check = 0; 2137 2138 ceph_fscache_invalidate(inode, false); 2139 2140 mutex_lock(&ci->i_truncate_mutex); 2141 2142 if (ceph_inode_is_shutdown(inode)) { 2143 pr_warn_ratelimited_client(cl, 2144 "%p %llx.%llx is shut down\n", inode, 2145 ceph_vinop(inode)); 2146 mapping_set_error(inode->i_mapping, -EIO); 2147 truncate_pagecache(inode, 0); 2148 mutex_unlock(&ci->i_truncate_mutex); 2149 goto out; 2150 } 2151 2152 spin_lock(&ci->i_ceph_lock); 2153 doutc(cl, "%p %llx.%llx gen %d revoking %d\n", inode, 2154 ceph_vinop(inode), ci->i_rdcache_gen, ci->i_rdcache_revoking); 2155 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { 2156 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2157 check = 1; 2158 spin_unlock(&ci->i_ceph_lock); 2159 mutex_unlock(&ci->i_truncate_mutex); 2160 goto out; 2161 } 2162 orig_gen = ci->i_rdcache_gen; 2163 spin_unlock(&ci->i_ceph_lock); 2164 2165 if (invalidate_inode_pages2(inode->i_mapping) < 0) { 2166 pr_err_client(cl, "invalidate_inode_pages2 %llx.%llx failed\n", 2167 ceph_vinop(inode)); 2168 } 2169 2170 spin_lock(&ci->i_ceph_lock); 2171 if (orig_gen == ci->i_rdcache_gen && 2172 orig_gen == ci->i_rdcache_revoking) { 2173 doutc(cl, "%p %llx.%llx gen %d successful\n", inode, 2174 ceph_vinop(inode), ci->i_rdcache_gen); 2175 ci->i_rdcache_revoking--; 2176 check = 1; 2177 } else { 2178 doutc(cl, "%p %llx.%llx gen %d raced, now %d revoking %d\n", 2179 inode, ceph_vinop(inode), orig_gen, ci->i_rdcache_gen, 2180 ci->i_rdcache_revoking); 2181 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE)) 2182 check = 1; 2183 } 2184 spin_unlock(&ci->i_ceph_lock); 2185 mutex_unlock(&ci->i_truncate_mutex); 2186out: 2187 if (check) 2188 ceph_check_caps(ci, 0); 2189} 2190 2191/* 2192 * Make sure any pending truncation is applied before doing anything 2193 * that may depend on it. 2194 */ 2195void __ceph_do_pending_vmtruncate(struct inode *inode) 2196{ 2197 struct ceph_client *cl = ceph_inode_to_client(inode); 2198 struct ceph_inode_info *ci = ceph_inode(inode); 2199 u64 to; 2200 int wrbuffer_refs, finish = 0; 2201 2202 mutex_lock(&ci->i_truncate_mutex); 2203retry: 2204 spin_lock(&ci->i_ceph_lock); 2205 if (ci->i_truncate_pending == 0) { 2206 doutc(cl, "%p %llx.%llx none pending\n", inode, 2207 ceph_vinop(inode)); 2208 spin_unlock(&ci->i_ceph_lock); 2209 mutex_unlock(&ci->i_truncate_mutex); 2210 return; 2211 } 2212 2213 /* 2214 * make sure any dirty snapped pages are flushed before we 2215 * possibly truncate them.. so write AND block! 2216 */ 2217 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { 2218 spin_unlock(&ci->i_ceph_lock); 2219 doutc(cl, "%p %llx.%llx flushing snaps first\n", inode, 2220 ceph_vinop(inode)); 2221 filemap_write_and_wait_range(&inode->i_data, 0, 2222 inode->i_sb->s_maxbytes); 2223 goto retry; 2224 } 2225 2226 /* there should be no reader or writer */ 2227 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref); 2228 2229 to = ci->i_truncate_pagecache_size; 2230 wrbuffer_refs = ci->i_wrbuffer_ref; 2231 doutc(cl, "%p %llx.%llx (%d) to %lld\n", inode, ceph_vinop(inode), 2232 ci->i_truncate_pending, to); 2233 spin_unlock(&ci->i_ceph_lock); 2234 2235 ceph_fscache_resize(inode, to); 2236 truncate_pagecache(inode, to); 2237 2238 spin_lock(&ci->i_ceph_lock); 2239 if (to == ci->i_truncate_pagecache_size) { 2240 ci->i_truncate_pending = 0; 2241 finish = 1; 2242 } 2243 spin_unlock(&ci->i_ceph_lock); 2244 if (!finish) 2245 goto retry; 2246 2247 mutex_unlock(&ci->i_truncate_mutex); 2248 2249 if (wrbuffer_refs == 0) 2250 ceph_check_caps(ci, 0); 2251 2252 wake_up_all(&ci->i_cap_wq); 2253} 2254 2255static void ceph_inode_work(struct work_struct *work) 2256{ 2257 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, 2258 i_work); 2259 struct inode *inode = &ci->netfs.inode; 2260 struct ceph_client *cl = ceph_inode_to_client(inode); 2261 2262 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) { 2263 doutc(cl, "writeback %p %llx.%llx\n", inode, ceph_vinop(inode)); 2264 filemap_fdatawrite(&inode->i_data); 2265 } 2266 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask)) 2267 ceph_do_invalidate_pages(inode); 2268 2269 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask)) 2270 __ceph_do_pending_vmtruncate(inode); 2271 2272 if (test_and_clear_bit(CEPH_I_WORK_CHECK_CAPS, &ci->i_work_mask)) 2273 ceph_check_caps(ci, 0); 2274 2275 if (test_and_clear_bit(CEPH_I_WORK_FLUSH_SNAPS, &ci->i_work_mask)) 2276 ceph_flush_snaps(ci, NULL); 2277 2278 iput(inode); 2279} 2280 2281static const char *ceph_encrypted_get_link(struct dentry *dentry, 2282 struct inode *inode, 2283 struct delayed_call *done) 2284{ 2285 struct ceph_inode_info *ci = ceph_inode(inode); 2286 2287 if (!dentry) 2288 return ERR_PTR(-ECHILD); 2289 2290 return fscrypt_get_symlink(inode, ci->i_symlink, i_size_read(inode), 2291 done); 2292} 2293 2294static int ceph_encrypted_symlink_getattr(struct mnt_idmap *idmap, 2295 const struct path *path, 2296 struct kstat *stat, u32 request_mask, 2297 unsigned int query_flags) 2298{ 2299 int ret; 2300 2301 ret = ceph_getattr(idmap, path, stat, request_mask, query_flags); 2302 if (ret) 2303 return ret; 2304 return fscrypt_symlink_getattr(path, stat); 2305} 2306 2307/* 2308 * symlinks 2309 */ 2310static const struct inode_operations ceph_symlink_iops = { 2311 .get_link = simple_get_link, 2312 .setattr = ceph_setattr, 2313 .getattr = ceph_getattr, 2314 .listxattr = ceph_listxattr, 2315}; 2316 2317static const struct inode_operations ceph_encrypted_symlink_iops = { 2318 .get_link = ceph_encrypted_get_link, 2319 .setattr = ceph_setattr, 2320 .getattr = ceph_encrypted_symlink_getattr, 2321 .listxattr = ceph_listxattr, 2322}; 2323 2324/* 2325 * Transfer the encrypted last block to the MDS and the MDS 2326 * will help update it when truncating a smaller size. 2327 * 2328 * We don't support a PAGE_SIZE that is smaller than the 2329 * CEPH_FSCRYPT_BLOCK_SIZE. 2330 */ 2331static int fill_fscrypt_truncate(struct inode *inode, 2332 struct ceph_mds_request *req, 2333 struct iattr *attr) 2334{ 2335 struct ceph_client *cl = ceph_inode_to_client(inode); 2336 struct ceph_inode_info *ci = ceph_inode(inode); 2337 int boff = attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE; 2338 loff_t pos, orig_pos = round_down(attr->ia_size, 2339 CEPH_FSCRYPT_BLOCK_SIZE); 2340 u64 block = orig_pos >> CEPH_FSCRYPT_BLOCK_SHIFT; 2341 struct ceph_pagelist *pagelist = NULL; 2342 struct kvec iov = {0}; 2343 struct iov_iter iter; 2344 struct page *page = NULL; 2345 struct ceph_fscrypt_truncate_size_header header; 2346 int retry_op = 0; 2347 int len = CEPH_FSCRYPT_BLOCK_SIZE; 2348 loff_t i_size = i_size_read(inode); 2349 int got, ret, issued; 2350 u64 objver; 2351 2352 ret = __ceph_get_caps(inode, NULL, CEPH_CAP_FILE_RD, 0, -1, &got); 2353 if (ret < 0) 2354 return ret; 2355 2356 issued = __ceph_caps_issued(ci, NULL); 2357 2358 doutc(cl, "size %lld -> %lld got cap refs on %s, issued %s\n", 2359 i_size, attr->ia_size, ceph_cap_string(got), 2360 ceph_cap_string(issued)); 2361 2362 /* Try to writeback the dirty pagecaches */ 2363 if (issued & (CEPH_CAP_FILE_BUFFER)) { 2364 loff_t lend = orig_pos + CEPH_FSCRYPT_BLOCK_SHIFT - 1; 2365 2366 ret = filemap_write_and_wait_range(inode->i_mapping, 2367 orig_pos, lend); 2368 if (ret < 0) 2369 goto out; 2370 } 2371 2372 page = __page_cache_alloc(GFP_KERNEL); 2373 if (page == NULL) { 2374 ret = -ENOMEM; 2375 goto out; 2376 } 2377 2378 pagelist = ceph_pagelist_alloc(GFP_KERNEL); 2379 if (!pagelist) { 2380 ret = -ENOMEM; 2381 goto out; 2382 } 2383 2384 iov.iov_base = kmap_local_page(page); 2385 iov.iov_len = len; 2386 iov_iter_kvec(&iter, READ, &iov, 1, len); 2387 2388 pos = orig_pos; 2389 ret = __ceph_sync_read(inode, &pos, &iter, &retry_op, &objver); 2390 if (ret < 0) 2391 goto out; 2392 2393 /* Insert the header first */ 2394 header.ver = 1; 2395 header.compat = 1; 2396 header.change_attr = cpu_to_le64(inode_peek_iversion_raw(inode)); 2397 2398 /* 2399 * Always set the block_size to CEPH_FSCRYPT_BLOCK_SIZE, 2400 * because in MDS it may need this to do the truncate. 2401 */ 2402 header.block_size = cpu_to_le32(CEPH_FSCRYPT_BLOCK_SIZE); 2403 2404 /* 2405 * If we hit a hole here, we should just skip filling 2406 * the fscrypt for the request, because once the fscrypt 2407 * is enabled, the file will be split into many blocks 2408 * with the size of CEPH_FSCRYPT_BLOCK_SIZE, if there 2409 * has a hole, the hole size should be multiple of block 2410 * size. 2411 * 2412 * If the Rados object doesn't exist, it will be set to 0. 2413 */ 2414 if (!objver) { 2415 doutc(cl, "hit hole, ppos %lld < size %lld\n", pos, i_size); 2416 2417 header.data_len = cpu_to_le32(8 + 8 + 4); 2418 header.file_offset = 0; 2419 ret = 0; 2420 } else { 2421 header.data_len = cpu_to_le32(8 + 8 + 4 + CEPH_FSCRYPT_BLOCK_SIZE); 2422 header.file_offset = cpu_to_le64(orig_pos); 2423 2424 doutc(cl, "encrypt block boff/bsize %d/%lu\n", boff, 2425 CEPH_FSCRYPT_BLOCK_SIZE); 2426 2427 /* truncate and zero out the extra contents for the last block */ 2428 memset(iov.iov_base + boff, 0, PAGE_SIZE - boff); 2429 2430 /* encrypt the last block */ 2431 ret = ceph_fscrypt_encrypt_block_inplace(inode, page, 2432 CEPH_FSCRYPT_BLOCK_SIZE, 2433 0, block, 2434 GFP_KERNEL); 2435 if (ret) 2436 goto out; 2437 } 2438 2439 /* Insert the header */ 2440 ret = ceph_pagelist_append(pagelist, &header, sizeof(header)); 2441 if (ret) 2442 goto out; 2443 2444 if (header.block_size) { 2445 /* Append the last block contents to pagelist */ 2446 ret = ceph_pagelist_append(pagelist, iov.iov_base, 2447 CEPH_FSCRYPT_BLOCK_SIZE); 2448 if (ret) 2449 goto out; 2450 } 2451 req->r_pagelist = pagelist; 2452out: 2453 doutc(cl, "%p %llx.%llx size dropping cap refs on %s\n", inode, 2454 ceph_vinop(inode), ceph_cap_string(got)); 2455 ceph_put_cap_refs(ci, got); 2456 if (iov.iov_base) 2457 kunmap_local(iov.iov_base); 2458 if (page) 2459 __free_pages(page, 0); 2460 if (ret && pagelist) 2461 ceph_pagelist_release(pagelist); 2462 return ret; 2463} 2464 2465int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode, 2466 struct iattr *attr, struct ceph_iattr *cia) 2467{ 2468 struct ceph_inode_info *ci = ceph_inode(inode); 2469 unsigned int ia_valid = attr->ia_valid; 2470 struct ceph_mds_request *req; 2471 struct ceph_mds_client *mdsc = ceph_sb_to_fs_client(inode->i_sb)->mdsc; 2472 struct ceph_client *cl = ceph_inode_to_client(inode); 2473 struct ceph_cap_flush *prealloc_cf; 2474 loff_t isize = i_size_read(inode); 2475 int issued; 2476 int release = 0, dirtied = 0; 2477 int mask = 0; 2478 int err = 0; 2479 int inode_dirty_flags = 0; 2480 bool lock_snap_rwsem = false; 2481 bool fill_fscrypt; 2482 int truncate_retry = 20; /* The RMW will take around 50ms */ 2483 2484retry: 2485 prealloc_cf = ceph_alloc_cap_flush(); 2486 if (!prealloc_cf) 2487 return -ENOMEM; 2488 2489 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, 2490 USE_AUTH_MDS); 2491 if (IS_ERR(req)) { 2492 ceph_free_cap_flush(prealloc_cf); 2493 return PTR_ERR(req); 2494 } 2495 2496 fill_fscrypt = false; 2497 spin_lock(&ci->i_ceph_lock); 2498 issued = __ceph_caps_issued(ci, NULL); 2499 2500 if (!ci->i_head_snapc && 2501 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) { 2502 lock_snap_rwsem = true; 2503 if (!down_read_trylock(&mdsc->snap_rwsem)) { 2504 spin_unlock(&ci->i_ceph_lock); 2505 down_read(&mdsc->snap_rwsem); 2506 spin_lock(&ci->i_ceph_lock); 2507 issued = __ceph_caps_issued(ci, NULL); 2508 } 2509 } 2510 2511 doutc(cl, "%p %llx.%llx issued %s\n", inode, ceph_vinop(inode), 2512 ceph_cap_string(issued)); 2513#if IS_ENABLED(CONFIG_FS_ENCRYPTION) 2514 if (cia && cia->fscrypt_auth) { 2515 u32 len = ceph_fscrypt_auth_len(cia->fscrypt_auth); 2516 2517 if (len > sizeof(*cia->fscrypt_auth)) { 2518 err = -EINVAL; 2519 spin_unlock(&ci->i_ceph_lock); 2520 goto out; 2521 } 2522 2523 doutc(cl, "%p %llx.%llx fscrypt_auth len %u to %u)\n", inode, 2524 ceph_vinop(inode), ci->fscrypt_auth_len, len); 2525 2526 /* It should never be re-set once set */ 2527 WARN_ON_ONCE(ci->fscrypt_auth); 2528 2529 if (issued & CEPH_CAP_AUTH_EXCL) { 2530 dirtied |= CEPH_CAP_AUTH_EXCL; 2531 kfree(ci->fscrypt_auth); 2532 ci->fscrypt_auth = (u8 *)cia->fscrypt_auth; 2533 ci->fscrypt_auth_len = len; 2534 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2535 ci->fscrypt_auth_len != len || 2536 memcmp(ci->fscrypt_auth, cia->fscrypt_auth, len)) { 2537 req->r_fscrypt_auth = cia->fscrypt_auth; 2538 mask |= CEPH_SETATTR_FSCRYPT_AUTH; 2539 release |= CEPH_CAP_AUTH_SHARED; 2540 } 2541 cia->fscrypt_auth = NULL; 2542 } 2543#else 2544 if (cia && cia->fscrypt_auth) { 2545 err = -EINVAL; 2546 spin_unlock(&ci->i_ceph_lock); 2547 goto out; 2548 } 2549#endif /* CONFIG_FS_ENCRYPTION */ 2550 2551 if (ia_valid & ATTR_UID) { 2552 kuid_t fsuid = from_vfsuid(idmap, i_user_ns(inode), attr->ia_vfsuid); 2553 2554 doutc(cl, "%p %llx.%llx uid %d -> %d\n", inode, 2555 ceph_vinop(inode), 2556 from_kuid(&init_user_ns, inode->i_uid), 2557 from_kuid(&init_user_ns, attr->ia_uid)); 2558 if (issued & CEPH_CAP_AUTH_EXCL) { 2559 inode->i_uid = fsuid; 2560 dirtied |= CEPH_CAP_AUTH_EXCL; 2561 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2562 !uid_eq(fsuid, inode->i_uid)) { 2563 req->r_args.setattr.uid = cpu_to_le32( 2564 from_kuid(&init_user_ns, fsuid)); 2565 mask |= CEPH_SETATTR_UID; 2566 release |= CEPH_CAP_AUTH_SHARED; 2567 } 2568 } 2569 if (ia_valid & ATTR_GID) { 2570 kgid_t fsgid = from_vfsgid(idmap, i_user_ns(inode), attr->ia_vfsgid); 2571 2572 doutc(cl, "%p %llx.%llx gid %d -> %d\n", inode, 2573 ceph_vinop(inode), 2574 from_kgid(&init_user_ns, inode->i_gid), 2575 from_kgid(&init_user_ns, attr->ia_gid)); 2576 if (issued & CEPH_CAP_AUTH_EXCL) { 2577 inode->i_gid = fsgid; 2578 dirtied |= CEPH_CAP_AUTH_EXCL; 2579 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2580 !gid_eq(fsgid, inode->i_gid)) { 2581 req->r_args.setattr.gid = cpu_to_le32( 2582 from_kgid(&init_user_ns, fsgid)); 2583 mask |= CEPH_SETATTR_GID; 2584 release |= CEPH_CAP_AUTH_SHARED; 2585 } 2586 } 2587 if (ia_valid & ATTR_MODE) { 2588 doutc(cl, "%p %llx.%llx mode 0%o -> 0%o\n", inode, 2589 ceph_vinop(inode), inode->i_mode, attr->ia_mode); 2590 if (issued & CEPH_CAP_AUTH_EXCL) { 2591 inode->i_mode = attr->ia_mode; 2592 dirtied |= CEPH_CAP_AUTH_EXCL; 2593 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || 2594 attr->ia_mode != inode->i_mode) { 2595 inode->i_mode = attr->ia_mode; 2596 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); 2597 mask |= CEPH_SETATTR_MODE; 2598 release |= CEPH_CAP_AUTH_SHARED; 2599 } 2600 } 2601 2602 if (ia_valid & ATTR_ATIME) { 2603 struct timespec64 atime = inode_get_atime(inode); 2604 2605 doutc(cl, "%p %llx.%llx atime %lld.%09ld -> %lld.%09ld\n", 2606 inode, ceph_vinop(inode), 2607 atime.tv_sec, atime.tv_nsec, 2608 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); 2609 if (issued & CEPH_CAP_FILE_EXCL) { 2610 ci->i_time_warp_seq++; 2611 inode_set_atime_to_ts(inode, attr->ia_atime); 2612 dirtied |= CEPH_CAP_FILE_EXCL; 2613 } else if ((issued & CEPH_CAP_FILE_WR) && 2614 timespec64_compare(&atime, 2615 &attr->ia_atime) < 0) { 2616 inode_set_atime_to_ts(inode, attr->ia_atime); 2617 dirtied |= CEPH_CAP_FILE_WR; 2618 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2619 !timespec64_equal(&atime, &attr->ia_atime)) { 2620 ceph_encode_timespec64(&req->r_args.setattr.atime, 2621 &attr->ia_atime); 2622 mask |= CEPH_SETATTR_ATIME; 2623 release |= CEPH_CAP_FILE_SHARED | 2624 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2625 } 2626 } 2627 if (ia_valid & ATTR_SIZE) { 2628 doutc(cl, "%p %llx.%llx size %lld -> %lld\n", inode, 2629 ceph_vinop(inode), isize, attr->ia_size); 2630 /* 2631 * Only when the new size is smaller and not aligned to 2632 * CEPH_FSCRYPT_BLOCK_SIZE will the RMW is needed. 2633 */ 2634 if (IS_ENCRYPTED(inode) && attr->ia_size < isize && 2635 (attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE)) { 2636 mask |= CEPH_SETATTR_SIZE; 2637 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2638 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2639 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2640 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2641 req->r_args.setattr.size = 2642 cpu_to_le64(round_up(attr->ia_size, 2643 CEPH_FSCRYPT_BLOCK_SIZE)); 2644 req->r_args.setattr.old_size = 2645 cpu_to_le64(round_up(isize, 2646 CEPH_FSCRYPT_BLOCK_SIZE)); 2647 req->r_fscrypt_file = attr->ia_size; 2648 fill_fscrypt = true; 2649 } else if ((issued & CEPH_CAP_FILE_EXCL) && attr->ia_size >= isize) { 2650 if (attr->ia_size > isize) { 2651 i_size_write(inode, attr->ia_size); 2652 inode->i_blocks = calc_inode_blocks(attr->ia_size); 2653 ci->i_reported_size = attr->ia_size; 2654 dirtied |= CEPH_CAP_FILE_EXCL; 2655 ia_valid |= ATTR_MTIME; 2656 } 2657 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2658 attr->ia_size != isize) { 2659 mask |= CEPH_SETATTR_SIZE; 2660 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL | 2661 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2662 if (IS_ENCRYPTED(inode) && attr->ia_size) { 2663 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); 2664 mask |= CEPH_SETATTR_FSCRYPT_FILE; 2665 req->r_args.setattr.size = 2666 cpu_to_le64(round_up(attr->ia_size, 2667 CEPH_FSCRYPT_BLOCK_SIZE)); 2668 req->r_args.setattr.old_size = 2669 cpu_to_le64(round_up(isize, 2670 CEPH_FSCRYPT_BLOCK_SIZE)); 2671 req->r_fscrypt_file = attr->ia_size; 2672 } else { 2673 req->r_args.setattr.size = cpu_to_le64(attr->ia_size); 2674 req->r_args.setattr.old_size = cpu_to_le64(isize); 2675 req->r_fscrypt_file = 0; 2676 } 2677 } 2678 } 2679 if (ia_valid & ATTR_MTIME) { 2680 struct timespec64 mtime = inode_get_mtime(inode); 2681 2682 doutc(cl, "%p %llx.%llx mtime %lld.%09ld -> %lld.%09ld\n", 2683 inode, ceph_vinop(inode), 2684 mtime.tv_sec, mtime.tv_nsec, 2685 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); 2686 if (issued & CEPH_CAP_FILE_EXCL) { 2687 ci->i_time_warp_seq++; 2688 inode_set_mtime_to_ts(inode, attr->ia_mtime); 2689 dirtied |= CEPH_CAP_FILE_EXCL; 2690 } else if ((issued & CEPH_CAP_FILE_WR) && 2691 timespec64_compare(&mtime, &attr->ia_mtime) < 0) { 2692 inode_set_mtime_to_ts(inode, attr->ia_mtime); 2693 dirtied |= CEPH_CAP_FILE_WR; 2694 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || 2695 !timespec64_equal(&mtime, &attr->ia_mtime)) { 2696 ceph_encode_timespec64(&req->r_args.setattr.mtime, 2697 &attr->ia_mtime); 2698 mask |= CEPH_SETATTR_MTIME; 2699 release |= CEPH_CAP_FILE_SHARED | 2700 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR; 2701 } 2702 } 2703 2704 /* these do nothing */ 2705 if (ia_valid & ATTR_CTIME) { 2706 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| 2707 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; 2708 doutc(cl, "%p %llx.%llx ctime %lld.%09ld -> %lld.%09ld (%s)\n", 2709 inode, ceph_vinop(inode), 2710 inode_get_ctime_sec(inode), 2711 inode_get_ctime_nsec(inode), 2712 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, 2713 only ? "ctime only" : "ignored"); 2714 if (only) { 2715 /* 2716 * if kernel wants to dirty ctime but nothing else, 2717 * we need to choose a cap to dirty under, or do 2718 * a almost-no-op setattr 2719 */ 2720 if (issued & CEPH_CAP_AUTH_EXCL) 2721 dirtied |= CEPH_CAP_AUTH_EXCL; 2722 else if (issued & CEPH_CAP_FILE_EXCL) 2723 dirtied |= CEPH_CAP_FILE_EXCL; 2724 else if (issued & CEPH_CAP_XATTR_EXCL) 2725 dirtied |= CEPH_CAP_XATTR_EXCL; 2726 else 2727 mask |= CEPH_SETATTR_CTIME; 2728 } 2729 } 2730 if (ia_valid & ATTR_FILE) 2731 doutc(cl, "%p %llx.%llx ATTR_FILE ... hrm!\n", inode, 2732 ceph_vinop(inode)); 2733 2734 if (dirtied) { 2735 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied, 2736 &prealloc_cf); 2737 inode_set_ctime_to_ts(inode, attr->ia_ctime); 2738 inode_inc_iversion_raw(inode); 2739 } 2740 2741 release &= issued; 2742 spin_unlock(&ci->i_ceph_lock); 2743 if (lock_snap_rwsem) { 2744 up_read(&mdsc->snap_rwsem); 2745 lock_snap_rwsem = false; 2746 } 2747 2748 if (inode_dirty_flags) 2749 __mark_inode_dirty(inode, inode_dirty_flags); 2750 2751 if (mask) { 2752 req->r_inode = inode; 2753 ihold(inode); 2754 req->r_inode_drop = release; 2755 req->r_args.setattr.mask = cpu_to_le32(mask); 2756 req->r_num_caps = 1; 2757 req->r_stamp = attr->ia_ctime; 2758 if (fill_fscrypt) { 2759 err = fill_fscrypt_truncate(inode, req, attr); 2760 if (err) 2761 goto out; 2762 } 2763 2764 /* 2765 * The truncate request will return -EAGAIN when the 2766 * last block has been updated just before the MDS 2767 * successfully gets the xlock for the FILE lock. To 2768 * avoid corrupting the file contents we need to retry 2769 * it. 2770 */ 2771 err = ceph_mdsc_do_request(mdsc, NULL, req); 2772 if (err == -EAGAIN && truncate_retry--) { 2773 doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote), retry it!\n", 2774 inode, ceph_vinop(inode), err, 2775 ceph_cap_string(dirtied), mask); 2776 ceph_mdsc_put_request(req); 2777 ceph_free_cap_flush(prealloc_cf); 2778 goto retry; 2779 } 2780 } 2781out: 2782 doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote)\n", inode, 2783 ceph_vinop(inode), err, ceph_cap_string(dirtied), mask); 2784 2785 ceph_mdsc_put_request(req); 2786 ceph_free_cap_flush(prealloc_cf); 2787 2788 if (err >= 0 && (mask & CEPH_SETATTR_SIZE)) 2789 __ceph_do_pending_vmtruncate(inode); 2790 2791 return err; 2792} 2793 2794/* 2795 * setattr 2796 */ 2797int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 2798 struct iattr *attr) 2799{ 2800 struct inode *inode = d_inode(dentry); 2801 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); 2802 int err; 2803 2804 if (ceph_snap(inode) != CEPH_NOSNAP) 2805 return -EROFS; 2806 2807 if (ceph_inode_is_shutdown(inode)) 2808 return -ESTALE; 2809 2810 err = fscrypt_prepare_setattr(dentry, attr); 2811 if (err) 2812 return err; 2813 2814 err = setattr_prepare(idmap, dentry, attr); 2815 if (err != 0) 2816 return err; 2817 2818 if ((attr->ia_valid & ATTR_SIZE) && 2819 attr->ia_size > max(i_size_read(inode), fsc->max_file_size)) 2820 return -EFBIG; 2821 2822 if ((attr->ia_valid & ATTR_SIZE) && 2823 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) 2824 return -EDQUOT; 2825 2826 err = __ceph_setattr(idmap, inode, attr, NULL); 2827 2828 if (err >= 0 && (attr->ia_valid & ATTR_MODE)) 2829 err = posix_acl_chmod(idmap, dentry, attr->ia_mode); 2830 2831 return err; 2832} 2833 2834int ceph_try_to_choose_auth_mds(struct inode *inode, int mask) 2835{ 2836 int issued = ceph_caps_issued(ceph_inode(inode)); 2837 2838 /* 2839 * If any 'x' caps is issued we can just choose the auth MDS 2840 * instead of the random replica MDSes. Because only when the 2841 * Locker is in LOCK_EXEC state will the loner client could 2842 * get the 'x' caps. And if we send the getattr requests to 2843 * any replica MDS it must auth pin and tries to rdlock from 2844 * the auth MDS, and then the auth MDS need to do the Locker 2845 * state transition to LOCK_SYNC. And after that the lock state 2846 * will change back. 2847 * 2848 * This cost much when doing the Locker state transition and 2849 * usually will need to revoke caps from clients. 2850 * 2851 * And for the 'Xs' caps for getxattr we will also choose the 2852 * auth MDS, because the MDS side code is buggy due to setxattr 2853 * won't notify the replica MDSes when the values changed and 2854 * the replica MDS will return the old values. Though we will 2855 * fix it in MDS code, but this still makes sense for old ceph. 2856 */ 2857 if (((mask & CEPH_CAP_ANY_SHARED) && (issued & CEPH_CAP_ANY_EXCL)) 2858 || (mask & (CEPH_STAT_RSTAT | CEPH_STAT_CAP_XATTR))) 2859 return USE_AUTH_MDS; 2860 else 2861 return USE_ANY_MDS; 2862} 2863 2864/* 2865 * Verify that we have a lease on the given mask. If not, 2866 * do a getattr against an mds. 2867 */ 2868int __ceph_do_getattr(struct inode *inode, struct page *locked_page, 2869 int mask, bool force) 2870{ 2871 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb); 2872 struct ceph_client *cl = fsc->client; 2873 struct ceph_mds_client *mdsc = fsc->mdsc; 2874 struct ceph_mds_request *req; 2875 int mode; 2876 int err; 2877 2878 if (ceph_snap(inode) == CEPH_SNAPDIR) { 2879 doutc(cl, "inode %p %llx.%llx SNAPDIR\n", inode, 2880 ceph_vinop(inode)); 2881 return 0; 2882 } 2883 2884 doutc(cl, "inode %p %llx.%llx mask %s mode 0%o\n", inode, 2885 ceph_vinop(inode), ceph_cap_string(mask), inode->i_mode); 2886 if (!force && ceph_caps_issued_mask_metric(ceph_inode(inode), mask, 1)) 2887 return 0; 2888 2889 mode = ceph_try_to_choose_auth_mds(inode, mask); 2890 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode); 2891 if (IS_ERR(req)) 2892 return PTR_ERR(req); 2893 req->r_inode = inode; 2894 ihold(inode); 2895 req->r_num_caps = 1; 2896 req->r_args.getattr.mask = cpu_to_le32(mask); 2897 req->r_locked_page = locked_page; 2898 err = ceph_mdsc_do_request(mdsc, NULL, req); 2899 if (locked_page && err == 0) { 2900 u64 inline_version = req->r_reply_info.targeti.inline_version; 2901 if (inline_version == 0) { 2902 /* the reply is supposed to contain inline data */ 2903 err = -EINVAL; 2904 } else if (inline_version == CEPH_INLINE_NONE || 2905 inline_version == 1) { 2906 err = -ENODATA; 2907 } else { 2908 err = req->r_reply_info.targeti.inline_len; 2909 } 2910 } 2911 ceph_mdsc_put_request(req); 2912 doutc(cl, "result=%d\n", err); 2913 return err; 2914} 2915 2916int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, 2917 size_t size) 2918{ 2919 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb); 2920 struct ceph_client *cl = fsc->client; 2921 struct ceph_mds_client *mdsc = fsc->mdsc; 2922 struct ceph_mds_request *req; 2923 int mode = USE_AUTH_MDS; 2924 int err; 2925 char *xattr_value; 2926 size_t xattr_value_len; 2927 2928 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETVXATTR, mode); 2929 if (IS_ERR(req)) { 2930 err = -ENOMEM; 2931 goto out; 2932 } 2933 2934 req->r_feature_needed = CEPHFS_FEATURE_OP_GETVXATTR; 2935 req->r_path2 = kstrdup(name, GFP_NOFS); 2936 if (!req->r_path2) { 2937 err = -ENOMEM; 2938 goto put; 2939 } 2940 2941 ihold(inode); 2942 req->r_inode = inode; 2943 err = ceph_mdsc_do_request(mdsc, NULL, req); 2944 if (err < 0) 2945 goto put; 2946 2947 xattr_value = req->r_reply_info.xattr_info.xattr_value; 2948 xattr_value_len = req->r_reply_info.xattr_info.xattr_value_len; 2949 2950 doutc(cl, "xattr_value_len:%zu, size:%zu\n", xattr_value_len, size); 2951 2952 err = (int)xattr_value_len; 2953 if (size == 0) 2954 goto put; 2955 2956 if (xattr_value_len > size) { 2957 err = -ERANGE; 2958 goto put; 2959 } 2960 2961 memcpy(value, xattr_value, xattr_value_len); 2962put: 2963 ceph_mdsc_put_request(req); 2964out: 2965 doutc(cl, "result=%d\n", err); 2966 return err; 2967} 2968 2969 2970/* 2971 * Check inode permissions. We verify we have a valid value for 2972 * the AUTH cap, then call the generic handler. 2973 */ 2974int ceph_permission(struct mnt_idmap *idmap, struct inode *inode, 2975 int mask) 2976{ 2977 int err; 2978 2979 if (mask & MAY_NOT_BLOCK) 2980 return -ECHILD; 2981 2982 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false); 2983 2984 if (!err) 2985 err = generic_permission(idmap, inode, mask); 2986 return err; 2987} 2988 2989/* Craft a mask of needed caps given a set of requested statx attrs. */ 2990static int statx_to_caps(u32 want, umode_t mode) 2991{ 2992 int mask = 0; 2993 2994 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME|STATX_CHANGE_COOKIE)) 2995 mask |= CEPH_CAP_AUTH_SHARED; 2996 2997 if (want & (STATX_NLINK|STATX_CTIME|STATX_CHANGE_COOKIE)) { 2998 /* 2999 * The link count for directories depends on inode->i_subdirs, 3000 * and that is only updated when Fs caps are held. 3001 */ 3002 if (S_ISDIR(mode)) 3003 mask |= CEPH_CAP_FILE_SHARED; 3004 else 3005 mask |= CEPH_CAP_LINK_SHARED; 3006 } 3007 3008 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|STATX_BLOCKS|STATX_CHANGE_COOKIE)) 3009 mask |= CEPH_CAP_FILE_SHARED; 3010 3011 if (want & (STATX_CTIME|STATX_CHANGE_COOKIE)) 3012 mask |= CEPH_CAP_XATTR_SHARED; 3013 3014 return mask; 3015} 3016 3017/* 3018 * Get all the attributes. If we have sufficient caps for the requested attrs, 3019 * then we can avoid talking to the MDS at all. 3020 */ 3021int ceph_getattr(struct mnt_idmap *idmap, const struct path *path, 3022 struct kstat *stat, u32 request_mask, unsigned int flags) 3023{ 3024 struct inode *inode = d_inode(path->dentry); 3025 struct super_block *sb = inode->i_sb; 3026 struct ceph_inode_info *ci = ceph_inode(inode); 3027 u32 valid_mask = STATX_BASIC_STATS; 3028 int err = 0; 3029 3030 if (ceph_inode_is_shutdown(inode)) 3031 return -ESTALE; 3032 3033 /* Skip the getattr altogether if we're asked not to sync */ 3034 if ((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) { 3035 err = ceph_do_getattr(inode, 3036 statx_to_caps(request_mask, inode->i_mode), 3037 flags & AT_STATX_FORCE_SYNC); 3038 if (err) 3039 return err; 3040 } 3041 3042 generic_fillattr(idmap, request_mask, inode, stat); 3043 stat->ino = ceph_present_inode(inode); 3044 3045 /* 3046 * btime on newly-allocated inodes is 0, so if this is still set to 3047 * that, then assume that it's not valid. 3048 */ 3049 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) { 3050 stat->btime = ci->i_btime; 3051 valid_mask |= STATX_BTIME; 3052 } 3053 3054 if (request_mask & STATX_CHANGE_COOKIE) { 3055 stat->change_cookie = inode_peek_iversion_raw(inode); 3056 valid_mask |= STATX_CHANGE_COOKIE; 3057 } 3058 3059 if (ceph_snap(inode) == CEPH_NOSNAP) 3060 stat->dev = sb->s_dev; 3061 else 3062 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0; 3063 3064 if (S_ISDIR(inode->i_mode)) { 3065 if (ceph_test_mount_opt(ceph_sb_to_fs_client(sb), RBYTES)) { 3066 stat->size = ci->i_rbytes; 3067 } else if (ceph_snap(inode) == CEPH_SNAPDIR) { 3068 struct ceph_inode_info *pci; 3069 struct ceph_snap_realm *realm; 3070 struct inode *parent; 3071 3072 parent = ceph_lookup_inode(sb, ceph_ino(inode)); 3073 if (IS_ERR(parent)) 3074 return PTR_ERR(parent); 3075 3076 pci = ceph_inode(parent); 3077 spin_lock(&pci->i_ceph_lock); 3078 realm = pci->i_snap_realm; 3079 if (realm) 3080 stat->size = realm->num_snaps; 3081 else 3082 stat->size = 0; 3083 spin_unlock(&pci->i_ceph_lock); 3084 iput(parent); 3085 } else { 3086 stat->size = ci->i_files + ci->i_subdirs; 3087 } 3088 stat->blocks = 0; 3089 stat->blksize = 65536; 3090 /* 3091 * Some applications rely on the number of st_nlink 3092 * value on directories to be either 0 (if unlinked) 3093 * or 2 + number of subdirectories. 3094 */ 3095 if (stat->nlink == 1) 3096 /* '.' + '..' + subdirs */ 3097 stat->nlink = 1 + 1 + ci->i_subdirs; 3098 } 3099 3100 stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC; 3101 if (IS_ENCRYPTED(inode)) 3102 stat->attributes |= STATX_ATTR_ENCRYPTED; 3103 stat->attributes_mask |= (STATX_ATTR_CHANGE_MONOTONIC | 3104 STATX_ATTR_ENCRYPTED); 3105 3106 stat->result_mask = request_mask & valid_mask; 3107 return err; 3108} 3109 3110void ceph_inode_shutdown(struct inode *inode) 3111{ 3112 struct ceph_inode_info *ci = ceph_inode(inode); 3113 struct rb_node *p; 3114 int iputs = 0; 3115 bool invalidate = false; 3116 3117 spin_lock(&ci->i_ceph_lock); 3118 ci->i_ceph_flags |= CEPH_I_SHUTDOWN; 3119 p = rb_first(&ci->i_caps); 3120 while (p) { 3121 struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); 3122 3123 p = rb_next(p); 3124 iputs += ceph_purge_inode_cap(inode, cap, &invalidate); 3125 } 3126 spin_unlock(&ci->i_ceph_lock); 3127 3128 if (invalidate) 3129 ceph_queue_invalidate(inode); 3130 while (iputs--) 3131 iput(inode); 3132} 3133