1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * namei.c 4 * 5 * Create and rename file, directory, symlinks 6 * 7 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 8 * 9 * Portions of this code from linux/fs/ext3/dir.c 10 * 11 * Copyright (C) 1992, 1993, 1994, 1995 12 * Remy Card (card@masi.ibp.fr) 13 * Laboratoire MASI - Institut Blaise pascal 14 * Universite Pierre et Marie Curie (Paris VI) 15 * 16 * from 17 * 18 * linux/fs/minix/dir.c 19 * 20 * Copyright (C) 1991, 1992 Linux Torvalds 21 */ 22 23#include <linux/fs.h> 24#include <linux/types.h> 25#include <linux/slab.h> 26#include <linux/highmem.h> 27#include <linux/quotaops.h> 28#include <linux/iversion.h> 29 30#include <cluster/masklog.h> 31 32#include "ocfs2.h" 33 34#include "alloc.h" 35#include "dcache.h" 36#include "dir.h" 37#include "dlmglue.h" 38#include "extent_map.h" 39#include "file.h" 40#include "inode.h" 41#include "journal.h" 42#include "namei.h" 43#include "suballoc.h" 44#include "super.h" 45#include "symlink.h" 46#include "sysfile.h" 47#include "uptodate.h" 48#include "xattr.h" 49#include "acl.h" 50#include "ocfs2_trace.h" 51#include "ioctl.h" 52 53#include "buffer_head_io.h" 54 55static int ocfs2_mknod_locked(struct ocfs2_super *osb, 56 struct inode *dir, 57 struct inode *inode, 58 dev_t dev, 59 struct buffer_head **new_fe_bh, 60 struct buffer_head *parent_fe_bh, 61 handle_t *handle, 62 struct ocfs2_alloc_context *inode_ac); 63 64static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 65 struct inode **ret_orphan_dir, 66 u64 blkno, 67 char *name, 68 struct ocfs2_dir_lookup_result *lookup, 69 bool dio); 70 71static int ocfs2_orphan_add(struct ocfs2_super *osb, 72 handle_t *handle, 73 struct inode *inode, 74 struct buffer_head *fe_bh, 75 char *name, 76 struct ocfs2_dir_lookup_result *lookup, 77 struct inode *orphan_dir_inode, 78 bool dio); 79 80static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 81 handle_t *handle, 82 struct inode *inode, 83 const char *symname); 84 85static int ocfs2_double_lock(struct ocfs2_super *osb, 86 struct buffer_head **bh1, 87 struct inode *inode1, 88 struct buffer_head **bh2, 89 struct inode *inode2, 90 int rename); 91 92static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2); 93/* An orphan dir name is an 8 byte value, printed as a hex string */ 94#define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) 95 96static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 97 unsigned int flags) 98{ 99 int status; 100 u64 blkno; 101 struct inode *inode = NULL; 102 struct dentry *ret; 103 struct ocfs2_inode_info *oi; 104 105 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len, 106 dentry->d_name.name, 107 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0); 108 109 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 110 ret = ERR_PTR(-ENAMETOOLONG); 111 goto bail; 112 } 113 114 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT); 115 if (status < 0) { 116 if (status != -ENOENT) 117 mlog_errno(status); 118 ret = ERR_PTR(status); 119 goto bail; 120 } 121 122 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, 123 dentry->d_name.len, &blkno); 124 if (status < 0) 125 goto bail_add; 126 127 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); 128 if (IS_ERR(inode)) { 129 ret = ERR_PTR(-EACCES); 130 goto bail_unlock; 131 } 132 133 oi = OCFS2_I(inode); 134 /* Clear any orphaned state... If we were able to look up the 135 * inode from a directory, it certainly can't be orphaned. We 136 * might have the bad state from a node which intended to 137 * orphan this inode but crashed before it could commit the 138 * unlink. */ 139 spin_lock(&oi->ip_lock); 140 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 141 spin_unlock(&oi->ip_lock); 142 143bail_add: 144 ret = d_splice_alias(inode, dentry); 145 146 if (inode) { 147 /* 148 * If d_splice_alias() finds a DCACHE_DISCONNECTED 149 * dentry, it will d_move() it on top of ourse. The 150 * return value will indicate this however, so in 151 * those cases, we switch them around for the locking 152 * code. 153 * 154 * NOTE: This dentry already has ->d_op set from 155 * ocfs2_get_parent() and ocfs2_get_dentry() 156 */ 157 if (!IS_ERR_OR_NULL(ret)) 158 dentry = ret; 159 160 status = ocfs2_dentry_attach_lock(dentry, inode, 161 OCFS2_I(dir)->ip_blkno); 162 if (status) { 163 mlog_errno(status); 164 ret = ERR_PTR(status); 165 goto bail_unlock; 166 } 167 } else 168 ocfs2_dentry_attach_gen(dentry); 169 170bail_unlock: 171 /* Don't drop the cluster lock until *after* the d_add -- 172 * unlink on another node will message us to remove that 173 * dentry under this lock so otherwise we can race this with 174 * the downconvert thread and have a stale dentry. */ 175 ocfs2_inode_unlock(dir, 0); 176 177bail: 178 179 trace_ocfs2_lookup_ret(ret); 180 181 return ret; 182} 183 184static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode) 185{ 186 struct inode *inode; 187 int status; 188 189 inode = new_inode(dir->i_sb); 190 if (!inode) { 191 mlog(ML_ERROR, "new_inode failed!\n"); 192 return ERR_PTR(-ENOMEM); 193 } 194 195 /* populate as many fields early on as possible - many of 196 * these are used by the support functions here and in 197 * callers. */ 198 if (S_ISDIR(mode)) 199 set_nlink(inode, 2); 200 mode = mode_strip_sgid(&nop_mnt_idmap, dir, mode); 201 inode_init_owner(&nop_mnt_idmap, inode, dir, mode); 202 status = dquot_initialize(inode); 203 if (status) 204 return ERR_PTR(status); 205 206 return inode; 207} 208 209static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, 210 struct dentry *dentry, struct inode *inode) 211{ 212 struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 213 214 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres); 215 ocfs2_lock_res_free(&dl->dl_lockres); 216 BUG_ON(dl->dl_count != 1); 217 spin_lock(&dentry_attach_lock); 218 dentry->d_fsdata = NULL; 219 spin_unlock(&dentry_attach_lock); 220 kfree(dl); 221 iput(inode); 222} 223 224static int ocfs2_mknod(struct mnt_idmap *idmap, 225 struct inode *dir, 226 struct dentry *dentry, 227 umode_t mode, 228 dev_t dev) 229{ 230 int status = 0; 231 struct buffer_head *parent_fe_bh = NULL; 232 handle_t *handle = NULL; 233 struct ocfs2_super *osb; 234 struct ocfs2_dinode *dirfe; 235 struct ocfs2_dinode *fe = NULL; 236 struct buffer_head *new_fe_bh = NULL; 237 struct inode *inode = NULL; 238 struct ocfs2_alloc_context *inode_ac = NULL; 239 struct ocfs2_alloc_context *data_ac = NULL; 240 struct ocfs2_alloc_context *meta_ac = NULL; 241 int want_clusters = 0; 242 int want_meta = 0; 243 int xattr_credits = 0; 244 struct ocfs2_security_xattr_info si = { 245 .name = NULL, 246 .enable = 1, 247 }; 248 int did_quota_inode = 0; 249 struct ocfs2_dir_lookup_result lookup = { NULL, }; 250 sigset_t oldset; 251 int did_block_signals = 0; 252 struct ocfs2_dentry_lock *dl = NULL; 253 254 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 255 (unsigned long long)OCFS2_I(dir)->ip_blkno, 256 (unsigned long)dev, mode); 257 258 status = dquot_initialize(dir); 259 if (status) { 260 mlog_errno(status); 261 return status; 262 } 263 264 /* get our super block */ 265 osb = OCFS2_SB(dir->i_sb); 266 267 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 268 if (status < 0) { 269 if (status != -ENOENT) 270 mlog_errno(status); 271 return status; 272 } 273 274 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 275 status = -EMLINK; 276 goto leave; 277 } 278 279 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 280 if (!ocfs2_read_links_count(dirfe)) { 281 /* can't make a file in a deleted directory. */ 282 status = -ENOENT; 283 goto leave; 284 } 285 286 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 287 dentry->d_name.len); 288 if (status) 289 goto leave; 290 291 /* get a spot inside the dir. */ 292 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 293 dentry->d_name.name, 294 dentry->d_name.len, &lookup); 295 if (status < 0) { 296 mlog_errno(status); 297 goto leave; 298 } 299 300 /* reserve an inode spot */ 301 status = ocfs2_reserve_new_inode(osb, &inode_ac); 302 if (status < 0) { 303 if (status != -ENOSPC) 304 mlog_errno(status); 305 goto leave; 306 } 307 308 inode = ocfs2_get_init_inode(dir, mode); 309 if (IS_ERR(inode)) { 310 status = PTR_ERR(inode); 311 inode = NULL; 312 mlog_errno(status); 313 goto leave; 314 } 315 316 /* get security xattr */ 317 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 318 if (status) { 319 if (status == -EOPNOTSUPP) 320 si.enable = 0; 321 else { 322 mlog_errno(status); 323 goto leave; 324 } 325 } 326 327 /* calculate meta data/clusters for setting security and acl xattr */ 328 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 329 &si, &want_clusters, 330 &xattr_credits, &want_meta); 331 if (status < 0) { 332 mlog_errno(status); 333 goto leave; 334 } 335 336 /* Reserve a cluster if creating an extent based directory. */ 337 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 338 want_clusters += 1; 339 340 /* Dir indexing requires extra space as well */ 341 if (ocfs2_supports_indexed_dirs(osb)) 342 want_meta++; 343 } 344 345 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 346 if (status < 0) { 347 if (status != -ENOSPC) 348 mlog_errno(status); 349 goto leave; 350 } 351 352 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 353 if (status < 0) { 354 if (status != -ENOSPC) 355 mlog_errno(status); 356 goto leave; 357 } 358 359 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 360 S_ISDIR(mode), 361 xattr_credits)); 362 if (IS_ERR(handle)) { 363 status = PTR_ERR(handle); 364 handle = NULL; 365 mlog_errno(status); 366 goto leave; 367 } 368 369 /* Starting to change things, restart is no longer possible. */ 370 ocfs2_block_signals(&oldset); 371 did_block_signals = 1; 372 373 status = dquot_alloc_inode(inode); 374 if (status) 375 goto leave; 376 did_quota_inode = 1; 377 378 /* do the real work now. */ 379 status = ocfs2_mknod_locked(osb, dir, inode, dev, 380 &new_fe_bh, parent_fe_bh, handle, 381 inode_ac); 382 if (status < 0) { 383 mlog_errno(status); 384 goto leave; 385 } 386 387 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 388 if (S_ISDIR(mode)) { 389 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 390 new_fe_bh, data_ac, meta_ac); 391 if (status < 0) { 392 mlog_errno(status); 393 goto leave; 394 } 395 396 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 397 parent_fe_bh, 398 OCFS2_JOURNAL_ACCESS_WRITE); 399 if (status < 0) { 400 mlog_errno(status); 401 goto leave; 402 } 403 ocfs2_add_links_count(dirfe, 1); 404 ocfs2_journal_dirty(handle, parent_fe_bh); 405 inc_nlink(dir); 406 } 407 408 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, 409 meta_ac, data_ac); 410 411 if (status < 0) { 412 mlog_errno(status); 413 goto roll_back; 414 } 415 416 if (si.enable) { 417 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 418 meta_ac, data_ac); 419 if (status < 0) { 420 mlog_errno(status); 421 goto roll_back; 422 } 423 } 424 425 /* 426 * Do this before adding the entry to the directory. We add 427 * also set d_op after success so that ->d_iput() will cleanup 428 * the dentry lock even if ocfs2_add_entry() fails below. 429 */ 430 status = ocfs2_dentry_attach_lock(dentry, inode, 431 OCFS2_I(dir)->ip_blkno); 432 if (status) { 433 mlog_errno(status); 434 goto roll_back; 435 } 436 437 dl = dentry->d_fsdata; 438 439 status = ocfs2_add_entry(handle, dentry, inode, 440 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 441 &lookup); 442 if (status < 0) { 443 mlog_errno(status); 444 goto roll_back; 445 } 446 447 insert_inode_hash(inode); 448 d_instantiate(dentry, inode); 449 status = 0; 450 451roll_back: 452 if (status < 0 && S_ISDIR(mode)) { 453 ocfs2_add_links_count(dirfe, -1); 454 drop_nlink(dir); 455 } 456 457leave: 458 if (status < 0 && did_quota_inode) 459 dquot_free_inode(inode); 460 if (handle) { 461 if (status < 0 && fe) 462 ocfs2_set_links_count(fe, 0); 463 ocfs2_commit_trans(osb, handle); 464 } 465 466 ocfs2_inode_unlock(dir, 1); 467 if (did_block_signals) 468 ocfs2_unblock_signals(&oldset); 469 470 brelse(new_fe_bh); 471 brelse(parent_fe_bh); 472 kfree(si.value); 473 474 ocfs2_free_dir_lookup_result(&lookup); 475 476 if (inode_ac) 477 ocfs2_free_alloc_context(inode_ac); 478 479 if (data_ac) 480 ocfs2_free_alloc_context(data_ac); 481 482 if (meta_ac) 483 ocfs2_free_alloc_context(meta_ac); 484 485 /* 486 * We should call iput after the i_rwsem of the bitmap been 487 * unlocked in ocfs2_free_alloc_context, or the 488 * ocfs2_delete_inode will mutex_lock again. 489 */ 490 if ((status < 0) && inode) { 491 if (dl) 492 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 493 494 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 495 clear_nlink(inode); 496 iput(inode); 497 } 498 499 if (status) 500 mlog_errno(status); 501 502 return status; 503} 504 505static int __ocfs2_mknod_locked(struct inode *dir, 506 struct inode *inode, 507 dev_t dev, 508 struct buffer_head **new_fe_bh, 509 struct buffer_head *parent_fe_bh, 510 handle_t *handle, 511 struct ocfs2_alloc_context *inode_ac, 512 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 513{ 514 int status = 0; 515 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 516 struct ocfs2_dinode *fe = NULL; 517 struct ocfs2_extent_list *fel; 518 u16 feat; 519 struct ocfs2_inode_info *oi = OCFS2_I(inode); 520 struct timespec64 ts; 521 522 *new_fe_bh = NULL; 523 524 /* populate as many fields early on as possible - many of 525 * these are used by the support functions here and in 526 * callers. */ 527 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 528 oi->ip_blkno = fe_blkno; 529 spin_lock(&osb->osb_lock); 530 inode->i_generation = osb->s_next_generation++; 531 spin_unlock(&osb->osb_lock); 532 533 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 534 if (!*new_fe_bh) { 535 status = -ENOMEM; 536 mlog_errno(status); 537 goto leave; 538 } 539 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 540 541 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 542 *new_fe_bh, 543 OCFS2_JOURNAL_ACCESS_CREATE); 544 if (status < 0) { 545 mlog_errno(status); 546 goto leave; 547 } 548 549 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 550 memset(fe, 0, osb->sb->s_blocksize); 551 552 fe->i_generation = cpu_to_le32(inode->i_generation); 553 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 554 fe->i_blkno = cpu_to_le64(fe_blkno); 555 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 556 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 557 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 558 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 559 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 560 fe->i_mode = cpu_to_le16(inode->i_mode); 561 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 562 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 563 564 ocfs2_set_links_count(fe, inode->i_nlink); 565 566 fe->i_last_eb_blk = 0; 567 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 568 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 569 ktime_get_coarse_real_ts64(&ts); 570 fe->i_atime = fe->i_ctime = fe->i_mtime = 571 cpu_to_le64(ts.tv_sec); 572 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 573 cpu_to_le32(ts.tv_nsec); 574 fe->i_dtime = 0; 575 576 /* 577 * If supported, directories start with inline data. If inline 578 * isn't supported, but indexing is, we start them as indexed. 579 */ 580 feat = le16_to_cpu(fe->i_dyn_features); 581 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 582 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 583 584 fe->id2.i_data.id_count = cpu_to_le16( 585 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 586 } else { 587 fel = &fe->id2.i_list; 588 fel->l_tree_depth = 0; 589 fel->l_next_free_rec = 0; 590 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 591 } 592 593 ocfs2_journal_dirty(handle, *new_fe_bh); 594 595 ocfs2_populate_inode(inode, fe, 1); 596 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 597 if (!ocfs2_mount_local(osb)) { 598 status = ocfs2_create_new_inode_locks(inode); 599 if (status < 0) 600 mlog_errno(status); 601 } 602 603 ocfs2_update_inode_fsync_trans(handle, inode, 1); 604 605leave: 606 if (status < 0) { 607 if (*new_fe_bh) { 608 brelse(*new_fe_bh); 609 *new_fe_bh = NULL; 610 } 611 } 612 613 if (status) 614 mlog_errno(status); 615 return status; 616} 617 618static int ocfs2_mknod_locked(struct ocfs2_super *osb, 619 struct inode *dir, 620 struct inode *inode, 621 dev_t dev, 622 struct buffer_head **new_fe_bh, 623 struct buffer_head *parent_fe_bh, 624 handle_t *handle, 625 struct ocfs2_alloc_context *inode_ac) 626{ 627 int status = 0; 628 u64 suballoc_loc, fe_blkno = 0; 629 u16 suballoc_bit; 630 631 *new_fe_bh = NULL; 632 633 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 634 inode_ac, &suballoc_loc, 635 &suballoc_bit, &fe_blkno); 636 if (status < 0) { 637 mlog_errno(status); 638 return status; 639 } 640 641 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 642 parent_fe_bh, handle, inode_ac, 643 fe_blkno, suballoc_loc, suballoc_bit); 644} 645 646static int ocfs2_mkdir(struct mnt_idmap *idmap, 647 struct inode *dir, 648 struct dentry *dentry, 649 umode_t mode) 650{ 651 int ret; 652 653 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 654 OCFS2_I(dir)->ip_blkno, mode); 655 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFDIR, 0); 656 if (ret) 657 mlog_errno(ret); 658 659 return ret; 660} 661 662static int ocfs2_create(struct mnt_idmap *idmap, 663 struct inode *dir, 664 struct dentry *dentry, 665 umode_t mode, 666 bool excl) 667{ 668 int ret; 669 670 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 671 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 672 ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFREG, 0); 673 if (ret) 674 mlog_errno(ret); 675 676 return ret; 677} 678 679static int ocfs2_link(struct dentry *old_dentry, 680 struct inode *dir, 681 struct dentry *dentry) 682{ 683 handle_t *handle; 684 struct inode *inode = d_inode(old_dentry); 685 struct inode *old_dir = d_inode(old_dentry->d_parent); 686 int err; 687 struct buffer_head *fe_bh = NULL; 688 struct buffer_head *old_dir_bh = NULL; 689 struct buffer_head *parent_fe_bh = NULL; 690 struct ocfs2_dinode *fe = NULL; 691 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 692 struct ocfs2_dir_lookup_result lookup = { NULL, }; 693 sigset_t oldset; 694 u64 old_de_ino; 695 696 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 697 old_dentry->d_name.len, old_dentry->d_name.name, 698 dentry->d_name.len, dentry->d_name.name); 699 700 if (S_ISDIR(inode->i_mode)) 701 return -EPERM; 702 703 err = dquot_initialize(dir); 704 if (err) { 705 mlog_errno(err); 706 return err; 707 } 708 709 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 710 &parent_fe_bh, dir, 0); 711 if (err < 0) { 712 if (err != -ENOENT) 713 mlog_errno(err); 714 return err; 715 } 716 717 /* make sure both dirs have bhs 718 * get an extra ref on old_dir_bh if old==new */ 719 if (!parent_fe_bh) { 720 if (old_dir_bh) { 721 parent_fe_bh = old_dir_bh; 722 get_bh(parent_fe_bh); 723 } else { 724 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 725 err = -EIO; 726 goto out; 727 } 728 } 729 730 if (!dir->i_nlink) { 731 err = -ENOENT; 732 goto out; 733 } 734 735 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 736 old_dentry->d_name.len, &old_de_ino); 737 if (err) { 738 err = -ENOENT; 739 goto out; 740 } 741 742 /* 743 * Check whether another node removed the source inode while we 744 * were in the vfs. 745 */ 746 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 747 err = -ENOENT; 748 goto out; 749 } 750 751 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 752 dentry->d_name.len); 753 if (err) 754 goto out; 755 756 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 757 dentry->d_name.name, 758 dentry->d_name.len, &lookup); 759 if (err < 0) { 760 mlog_errno(err); 761 goto out; 762 } 763 764 err = ocfs2_inode_lock(inode, &fe_bh, 1); 765 if (err < 0) { 766 if (err != -ENOENT) 767 mlog_errno(err); 768 goto out; 769 } 770 771 fe = (struct ocfs2_dinode *) fe_bh->b_data; 772 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 773 err = -EMLINK; 774 goto out_unlock_inode; 775 } 776 777 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 778 if (IS_ERR(handle)) { 779 err = PTR_ERR(handle); 780 handle = NULL; 781 mlog_errno(err); 782 goto out_unlock_inode; 783 } 784 785 /* Starting to change things, restart is no longer possible. */ 786 ocfs2_block_signals(&oldset); 787 788 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 789 OCFS2_JOURNAL_ACCESS_WRITE); 790 if (err < 0) { 791 mlog_errno(err); 792 goto out_commit; 793 } 794 795 inc_nlink(inode); 796 inode_set_ctime_current(inode); 797 ocfs2_set_links_count(fe, inode->i_nlink); 798 fe->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode)); 799 fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode)); 800 ocfs2_update_inode_fsync_trans(handle, inode, 0); 801 ocfs2_journal_dirty(handle, fe_bh); 802 803 err = ocfs2_add_entry(handle, dentry, inode, 804 OCFS2_I(inode)->ip_blkno, 805 parent_fe_bh, &lookup); 806 if (err) { 807 ocfs2_add_links_count(fe, -1); 808 drop_nlink(inode); 809 mlog_errno(err); 810 goto out_commit; 811 } 812 813 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 814 if (err) { 815 mlog_errno(err); 816 goto out_commit; 817 } 818 819 ihold(inode); 820 d_instantiate(dentry, inode); 821 822out_commit: 823 ocfs2_commit_trans(osb, handle); 824 ocfs2_unblock_signals(&oldset); 825out_unlock_inode: 826 ocfs2_inode_unlock(inode, 1); 827 828out: 829 ocfs2_double_unlock(old_dir, dir); 830 831 brelse(fe_bh); 832 brelse(parent_fe_bh); 833 brelse(old_dir_bh); 834 835 ocfs2_free_dir_lookup_result(&lookup); 836 837 if (err) 838 mlog_errno(err); 839 840 return err; 841} 842 843/* 844 * Takes and drops an exclusive lock on the given dentry. This will 845 * force other nodes to drop it. 846 */ 847static int ocfs2_remote_dentry_delete(struct dentry *dentry) 848{ 849 int ret; 850 851 ret = ocfs2_dentry_lock(dentry, 1); 852 if (ret) 853 mlog_errno(ret); 854 else 855 ocfs2_dentry_unlock(dentry, 1); 856 857 return ret; 858} 859 860static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 861{ 862 if (S_ISDIR(inode->i_mode)) { 863 if (inode->i_nlink == 2) 864 return 1; 865 return 0; 866 } 867 868 if (inode->i_nlink == 1) 869 return 1; 870 return 0; 871} 872 873static int ocfs2_unlink(struct inode *dir, 874 struct dentry *dentry) 875{ 876 int status; 877 int child_locked = 0; 878 bool is_unlinkable = false; 879 struct inode *inode = d_inode(dentry); 880 struct inode *orphan_dir = NULL; 881 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 882 u64 blkno; 883 struct ocfs2_dinode *fe = NULL; 884 struct buffer_head *fe_bh = NULL; 885 struct buffer_head *parent_node_bh = NULL; 886 handle_t *handle = NULL; 887 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 888 struct ocfs2_dir_lookup_result lookup = { NULL, }; 889 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 890 891 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 892 dentry->d_name.name, 893 (unsigned long long)OCFS2_I(dir)->ip_blkno, 894 (unsigned long long)OCFS2_I(inode)->ip_blkno); 895 896 status = dquot_initialize(dir); 897 if (status) { 898 mlog_errno(status); 899 return status; 900 } 901 902 BUG_ON(d_inode(dentry->d_parent) != dir); 903 904 if (inode == osb->root_inode) 905 return -EPERM; 906 907 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 908 OI_LS_PARENT); 909 if (status < 0) { 910 if (status != -ENOENT) 911 mlog_errno(status); 912 return status; 913 } 914 915 status = ocfs2_find_files_on_disk(dentry->d_name.name, 916 dentry->d_name.len, &blkno, dir, 917 &lookup); 918 if (status < 0) { 919 if (status != -ENOENT) 920 mlog_errno(status); 921 goto leave; 922 } 923 924 if (OCFS2_I(inode)->ip_blkno != blkno) { 925 status = -ENOENT; 926 927 trace_ocfs2_unlink_noent( 928 (unsigned long long)OCFS2_I(inode)->ip_blkno, 929 (unsigned long long)blkno, 930 OCFS2_I(inode)->ip_flags); 931 goto leave; 932 } 933 934 status = ocfs2_inode_lock(inode, &fe_bh, 1); 935 if (status < 0) { 936 if (status != -ENOENT) 937 mlog_errno(status); 938 goto leave; 939 } 940 child_locked = 1; 941 942 if (S_ISDIR(inode->i_mode)) { 943 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 944 status = -ENOTEMPTY; 945 goto leave; 946 } 947 } 948 949 status = ocfs2_remote_dentry_delete(dentry); 950 if (status < 0) { 951 /* This remote delete should succeed under all normal 952 * circumstances. */ 953 mlog_errno(status); 954 goto leave; 955 } 956 957 if (ocfs2_inode_is_unlinkable(inode)) { 958 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 959 OCFS2_I(inode)->ip_blkno, 960 orphan_name, &orphan_insert, 961 false); 962 if (status < 0) { 963 mlog_errno(status); 964 goto leave; 965 } 966 is_unlinkable = true; 967 } 968 969 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 970 if (IS_ERR(handle)) { 971 status = PTR_ERR(handle); 972 handle = NULL; 973 mlog_errno(status); 974 goto leave; 975 } 976 977 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 978 OCFS2_JOURNAL_ACCESS_WRITE); 979 if (status < 0) { 980 mlog_errno(status); 981 goto leave; 982 } 983 984 fe = (struct ocfs2_dinode *) fe_bh->b_data; 985 986 /* delete the name from the parent dir */ 987 status = ocfs2_delete_entry(handle, dir, &lookup); 988 if (status < 0) { 989 mlog_errno(status); 990 goto leave; 991 } 992 993 if (S_ISDIR(inode->i_mode)) 994 drop_nlink(inode); 995 drop_nlink(inode); 996 ocfs2_set_links_count(fe, inode->i_nlink); 997 ocfs2_update_inode_fsync_trans(handle, inode, 0); 998 ocfs2_journal_dirty(handle, fe_bh); 999 1000 inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); 1001 if (S_ISDIR(inode->i_mode)) 1002 drop_nlink(dir); 1003 1004 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1005 if (status < 0) { 1006 mlog_errno(status); 1007 if (S_ISDIR(inode->i_mode)) 1008 inc_nlink(dir); 1009 goto leave; 1010 } 1011 1012 if (is_unlinkable) { 1013 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1014 orphan_name, &orphan_insert, orphan_dir, false); 1015 if (status < 0) 1016 mlog_errno(status); 1017 } 1018 1019leave: 1020 if (handle) 1021 ocfs2_commit_trans(osb, handle); 1022 1023 if (orphan_dir) { 1024 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1025 ocfs2_inode_unlock(orphan_dir, 1); 1026 inode_unlock(orphan_dir); 1027 iput(orphan_dir); 1028 } 1029 1030 if (child_locked) 1031 ocfs2_inode_unlock(inode, 1); 1032 1033 ocfs2_inode_unlock(dir, 1); 1034 1035 brelse(fe_bh); 1036 brelse(parent_node_bh); 1037 1038 ocfs2_free_dir_lookup_result(&orphan_insert); 1039 ocfs2_free_dir_lookup_result(&lookup); 1040 1041 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1042 mlog_errno(status); 1043 1044 return status; 1045} 1046 1047static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1048 u64 src_inode_no, u64 dest_inode_no) 1049{ 1050 int ret = 0, i = 0; 1051 u64 parent_inode_no = 0; 1052 u64 child_inode_no = src_inode_no; 1053 struct inode *child_inode; 1054 1055#define MAX_LOOKUP_TIMES 32 1056 while (1) { 1057 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1058 if (IS_ERR(child_inode)) { 1059 ret = PTR_ERR(child_inode); 1060 break; 1061 } 1062 1063 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1064 if (ret < 0) { 1065 iput(child_inode); 1066 if (ret != -ENOENT) 1067 mlog_errno(ret); 1068 break; 1069 } 1070 1071 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1072 &parent_inode_no); 1073 ocfs2_inode_unlock(child_inode, 0); 1074 iput(child_inode); 1075 if (ret < 0) { 1076 ret = -ENOENT; 1077 break; 1078 } 1079 1080 if (parent_inode_no == dest_inode_no) { 1081 ret = 1; 1082 break; 1083 } 1084 1085 if (parent_inode_no == osb->root_inode->i_ino) { 1086 ret = 0; 1087 break; 1088 } 1089 1090 child_inode_no = parent_inode_no; 1091 1092 if (++i >= MAX_LOOKUP_TIMES) { 1093 mlog_ratelimited(ML_NOTICE, "max lookup times reached, " 1094 "filesystem may have nested directories, " 1095 "src inode: %llu, dest inode: %llu.\n", 1096 (unsigned long long)src_inode_no, 1097 (unsigned long long)dest_inode_no); 1098 ret = 0; 1099 break; 1100 } 1101 } 1102 1103 return ret; 1104} 1105 1106/* 1107 * The only place this should be used is rename and link! 1108 * if they have the same id, then the 1st one is the only one locked. 1109 */ 1110static int ocfs2_double_lock(struct ocfs2_super *osb, 1111 struct buffer_head **bh1, 1112 struct inode *inode1, 1113 struct buffer_head **bh2, 1114 struct inode *inode2, 1115 int rename) 1116{ 1117 int status; 1118 int inode1_is_ancestor, inode2_is_ancestor; 1119 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1120 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1121 1122 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1123 (unsigned long long)oi2->ip_blkno); 1124 1125 if (*bh1) 1126 *bh1 = NULL; 1127 if (*bh2) 1128 *bh2 = NULL; 1129 1130 /* we always want to lock the one with the lower lockid first. 1131 * and if they are nested, we lock ancestor first */ 1132 if (oi1->ip_blkno != oi2->ip_blkno) { 1133 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1134 oi1->ip_blkno); 1135 if (inode1_is_ancestor < 0) { 1136 status = inode1_is_ancestor; 1137 goto bail; 1138 } 1139 1140 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1141 oi2->ip_blkno); 1142 if (inode2_is_ancestor < 0) { 1143 status = inode2_is_ancestor; 1144 goto bail; 1145 } 1146 1147 if ((inode1_is_ancestor == 1) || 1148 (oi1->ip_blkno < oi2->ip_blkno && 1149 inode2_is_ancestor == 0)) { 1150 /* switch id1 and id2 around */ 1151 swap(bh2, bh1); 1152 swap(inode2, inode1); 1153 } 1154 /* lock id2 */ 1155 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1156 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1157 if (status < 0) { 1158 if (status != -ENOENT) 1159 mlog_errno(status); 1160 goto bail; 1161 } 1162 } 1163 1164 /* lock id1 */ 1165 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1166 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1167 if (status < 0) { 1168 /* 1169 * An error return must mean that no cluster locks 1170 * were held on function exit. 1171 */ 1172 if (oi1->ip_blkno != oi2->ip_blkno) { 1173 ocfs2_inode_unlock(inode2, 1); 1174 brelse(*bh2); 1175 *bh2 = NULL; 1176 } 1177 1178 if (status != -ENOENT) 1179 mlog_errno(status); 1180 } 1181 1182 trace_ocfs2_double_lock_end( 1183 (unsigned long long)oi1->ip_blkno, 1184 (unsigned long long)oi2->ip_blkno); 1185 1186bail: 1187 if (status) 1188 mlog_errno(status); 1189 return status; 1190} 1191 1192static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1193{ 1194 ocfs2_inode_unlock(inode1, 1); 1195 1196 if (inode1 != inode2) 1197 ocfs2_inode_unlock(inode2, 1); 1198} 1199 1200static int ocfs2_rename(struct mnt_idmap *idmap, 1201 struct inode *old_dir, 1202 struct dentry *old_dentry, 1203 struct inode *new_dir, 1204 struct dentry *new_dentry, 1205 unsigned int flags) 1206{ 1207 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1208 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1209 struct inode *old_inode = d_inode(old_dentry); 1210 struct inode *new_inode = d_inode(new_dentry); 1211 struct inode *orphan_dir = NULL; 1212 struct ocfs2_dinode *newfe = NULL; 1213 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1214 struct buffer_head *newfe_bh = NULL; 1215 struct buffer_head *old_inode_bh = NULL; 1216 struct ocfs2_super *osb = NULL; 1217 u64 newfe_blkno, old_de_ino; 1218 handle_t *handle = NULL; 1219 struct buffer_head *old_dir_bh = NULL; 1220 struct buffer_head *new_dir_bh = NULL; 1221 u32 old_dir_nlink = old_dir->i_nlink; 1222 struct ocfs2_dinode *old_di; 1223 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1224 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1225 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1226 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1227 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1228 bool should_add_orphan = false; 1229 1230 if (flags) 1231 return -EINVAL; 1232 1233 /* At some point it might be nice to break this function up a 1234 * bit. */ 1235 1236 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1237 old_dentry->d_name.len, old_dentry->d_name.name, 1238 new_dentry->d_name.len, new_dentry->d_name.name); 1239 1240 status = dquot_initialize(old_dir); 1241 if (status) { 1242 mlog_errno(status); 1243 goto bail; 1244 } 1245 status = dquot_initialize(new_dir); 1246 if (status) { 1247 mlog_errno(status); 1248 goto bail; 1249 } 1250 1251 osb = OCFS2_SB(old_dir->i_sb); 1252 1253 if (new_inode) { 1254 if (!igrab(new_inode)) 1255 BUG(); 1256 } 1257 1258 /* Assume a directory hierarchy thusly: 1259 * a/b/c 1260 * a/d 1261 * a,b,c, and d are all directories. 1262 * 1263 * from cwd of 'a' on both nodes: 1264 * node1: mv b/c d 1265 * node2: mv d b/c 1266 * 1267 * And that's why, just like the VFS, we need a file system 1268 * rename lock. */ 1269 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1270 status = ocfs2_rename_lock(osb); 1271 if (status < 0) { 1272 mlog_errno(status); 1273 goto bail; 1274 } 1275 rename_lock = 1; 1276 1277 /* here we cannot guarantee the inodes haven't just been 1278 * changed, so check if they are nested again */ 1279 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1280 old_inode->i_ino); 1281 if (status < 0) { 1282 mlog_errno(status); 1283 goto bail; 1284 } else if (status == 1) { 1285 status = -EPERM; 1286 trace_ocfs2_rename_not_permitted( 1287 (unsigned long long)old_inode->i_ino, 1288 (unsigned long long)new_dir->i_ino); 1289 goto bail; 1290 } 1291 } 1292 1293 /* if old and new are the same, this'll just do one lock. */ 1294 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1295 &new_dir_bh, new_dir, 1); 1296 if (status < 0) { 1297 mlog_errno(status); 1298 goto bail; 1299 } 1300 parents_locked = 1; 1301 1302 if (!new_dir->i_nlink) { 1303 status = -EACCES; 1304 goto bail; 1305 } 1306 1307 /* make sure both dirs have bhs 1308 * get an extra ref on old_dir_bh if old==new */ 1309 if (!new_dir_bh) { 1310 if (old_dir_bh) { 1311 new_dir_bh = old_dir_bh; 1312 get_bh(new_dir_bh); 1313 } else { 1314 mlog(ML_ERROR, "no old_dir_bh!\n"); 1315 status = -EIO; 1316 goto bail; 1317 } 1318 } 1319 1320 /* 1321 * Aside from allowing a meta data update, the locking here 1322 * also ensures that the downconvert thread on other nodes 1323 * won't have to concurrently downconvert the inode and the 1324 * dentry locks. 1325 */ 1326 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1327 OI_LS_PARENT); 1328 if (status < 0) { 1329 if (status != -ENOENT) 1330 mlog_errno(status); 1331 goto bail; 1332 } 1333 old_child_locked = 1; 1334 1335 status = ocfs2_remote_dentry_delete(old_dentry); 1336 if (status < 0) { 1337 mlog_errno(status); 1338 goto bail; 1339 } 1340 1341 if (S_ISDIR(old_inode->i_mode) && new_dir != old_dir) { 1342 u64 old_inode_parent; 1343 1344 update_dot_dot = 1; 1345 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1346 old_inode, 1347 &old_inode_dot_dot_res); 1348 if (status) { 1349 status = -EIO; 1350 goto bail; 1351 } 1352 1353 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1354 status = -EIO; 1355 goto bail; 1356 } 1357 1358 if (!new_inode && new_dir->i_nlink >= ocfs2_link_max(osb)) { 1359 status = -EMLINK; 1360 goto bail; 1361 } 1362 } 1363 1364 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1365 old_dentry->d_name.len, 1366 &old_de_ino); 1367 if (status) { 1368 status = -ENOENT; 1369 goto bail; 1370 } 1371 1372 /* 1373 * Check for inode number is _not_ due to possible IO errors. 1374 * We might rmdir the source, keep it as pwd of some process 1375 * and merrily kill the link to whatever was created under the 1376 * same name. Goodbye sticky bit ;-< 1377 */ 1378 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1379 status = -ENOENT; 1380 goto bail; 1381 } 1382 1383 /* check if the target already exists (in which case we need 1384 * to delete it */ 1385 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1386 new_dentry->d_name.len, 1387 &newfe_blkno, new_dir, 1388 &target_lookup_res); 1389 /* The only error we allow here is -ENOENT because the new 1390 * file not existing is perfectly valid. */ 1391 if ((status < 0) && (status != -ENOENT)) { 1392 /* If we cannot find the file specified we should just */ 1393 /* return the error... */ 1394 mlog_errno(status); 1395 goto bail; 1396 } 1397 if (status == 0) 1398 target_exists = 1; 1399 1400 if (!target_exists && new_inode) { 1401 /* 1402 * Target was unlinked by another node while we were 1403 * waiting to get to ocfs2_rename(). There isn't 1404 * anything we can do here to help the situation, so 1405 * bubble up the appropriate error. 1406 */ 1407 status = -ENOENT; 1408 goto bail; 1409 } 1410 1411 /* In case we need to overwrite an existing file, we blow it 1412 * away first */ 1413 if (target_exists) { 1414 /* VFS didn't think there existed an inode here, but 1415 * someone else in the cluster must have raced our 1416 * rename to create one. Today we error cleanly, in 1417 * the future we should consider calling iget to build 1418 * a new struct inode for this entry. */ 1419 if (!new_inode) { 1420 status = -EACCES; 1421 1422 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1423 new_dentry->d_name.name); 1424 goto bail; 1425 } 1426 1427 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1428 status = -EACCES; 1429 1430 trace_ocfs2_rename_disagree( 1431 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1432 (unsigned long long)newfe_blkno, 1433 OCFS2_I(new_inode)->ip_flags); 1434 goto bail; 1435 } 1436 1437 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1438 if (status < 0) { 1439 if (status != -ENOENT) 1440 mlog_errno(status); 1441 goto bail; 1442 } 1443 new_child_locked = 1; 1444 1445 status = ocfs2_remote_dentry_delete(new_dentry); 1446 if (status < 0) { 1447 mlog_errno(status); 1448 goto bail; 1449 } 1450 1451 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1452 1453 trace_ocfs2_rename_over_existing( 1454 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1455 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1456 1457 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1458 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1459 OCFS2_I(new_inode)->ip_blkno, 1460 orphan_name, &orphan_insert, 1461 false); 1462 if (status < 0) { 1463 mlog_errno(status); 1464 goto bail; 1465 } 1466 should_add_orphan = true; 1467 } 1468 } else { 1469 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1470 1471 status = ocfs2_check_dir_for_entry(new_dir, 1472 new_dentry->d_name.name, 1473 new_dentry->d_name.len); 1474 if (status) 1475 goto bail; 1476 1477 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1478 new_dentry->d_name.name, 1479 new_dentry->d_name.len, 1480 &target_insert); 1481 if (status < 0) { 1482 mlog_errno(status); 1483 goto bail; 1484 } 1485 } 1486 1487 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1488 if (IS_ERR(handle)) { 1489 status = PTR_ERR(handle); 1490 handle = NULL; 1491 mlog_errno(status); 1492 goto bail; 1493 } 1494 1495 if (target_exists) { 1496 if (S_ISDIR(new_inode->i_mode)) { 1497 if (new_inode->i_nlink != 2 || 1498 !ocfs2_empty_dir(new_inode)) { 1499 status = -ENOTEMPTY; 1500 goto bail; 1501 } 1502 } 1503 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1504 newfe_bh, 1505 OCFS2_JOURNAL_ACCESS_WRITE); 1506 if (status < 0) { 1507 mlog_errno(status); 1508 goto bail; 1509 } 1510 1511 /* change the dirent to point to the correct inode */ 1512 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1513 old_inode); 1514 if (status < 0) { 1515 mlog_errno(status); 1516 goto bail; 1517 } 1518 inode_inc_iversion(new_dir); 1519 1520 if (S_ISDIR(new_inode->i_mode)) 1521 ocfs2_set_links_count(newfe, 0); 1522 else 1523 ocfs2_add_links_count(newfe, -1); 1524 ocfs2_journal_dirty(handle, newfe_bh); 1525 if (should_add_orphan) { 1526 status = ocfs2_orphan_add(osb, handle, new_inode, 1527 newfe_bh, orphan_name, 1528 &orphan_insert, orphan_dir, false); 1529 if (status < 0) { 1530 mlog_errno(status); 1531 goto bail; 1532 } 1533 } 1534 } else { 1535 /* if the name was not found in new_dir, add it now */ 1536 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1537 OCFS2_I(old_inode)->ip_blkno, 1538 new_dir_bh, &target_insert); 1539 if (status < 0) { 1540 mlog_errno(status); 1541 goto bail; 1542 } 1543 } 1544 1545 inode_set_ctime_current(old_inode); 1546 mark_inode_dirty(old_inode); 1547 1548 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1549 old_inode_bh, 1550 OCFS2_JOURNAL_ACCESS_WRITE); 1551 if (status >= 0) { 1552 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1553 1554 old_di->i_ctime = cpu_to_le64(inode_get_ctime_sec(old_inode)); 1555 old_di->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(old_inode)); 1556 ocfs2_journal_dirty(handle, old_inode_bh); 1557 } else 1558 mlog_errno(status); 1559 1560 /* 1561 * Now that the name has been added to new_dir, remove the old name. 1562 * 1563 * We don't keep any directory entry context around until now 1564 * because the insert might have changed the type of directory 1565 * we're dealing with. 1566 */ 1567 status = ocfs2_find_entry(old_dentry->d_name.name, 1568 old_dentry->d_name.len, old_dir, 1569 &old_entry_lookup); 1570 if (status) { 1571 if (!is_journal_aborted(osb->journal->j_journal)) { 1572 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1573 "is not deleted.", 1574 new_dentry->d_name.len, new_dentry->d_name.name, 1575 old_dentry->d_name.len, old_dentry->d_name.name); 1576 } 1577 goto bail; 1578 } 1579 1580 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1581 if (status < 0) { 1582 mlog_errno(status); 1583 if (!is_journal_aborted(osb->journal->j_journal)) { 1584 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1585 "is not deleted.", 1586 new_dentry->d_name.len, new_dentry->d_name.name, 1587 old_dentry->d_name.len, old_dentry->d_name.name); 1588 } 1589 goto bail; 1590 } 1591 1592 if (new_inode) { 1593 drop_nlink(new_inode); 1594 inode_set_ctime_current(new_inode); 1595 } 1596 inode_set_mtime_to_ts(old_dir, inode_set_ctime_current(old_dir)); 1597 1598 if (update_dot_dot) { 1599 status = ocfs2_update_entry(old_inode, handle, 1600 &old_inode_dot_dot_res, new_dir); 1601 if (status < 0) { 1602 mlog_errno(status); 1603 goto bail; 1604 } 1605 } 1606 1607 if (S_ISDIR(old_inode->i_mode)) { 1608 drop_nlink(old_dir); 1609 if (new_inode) { 1610 drop_nlink(new_inode); 1611 } else { 1612 inc_nlink(new_dir); 1613 mark_inode_dirty(new_dir); 1614 } 1615 } 1616 mark_inode_dirty(old_dir); 1617 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1618 if (new_inode) { 1619 mark_inode_dirty(new_inode); 1620 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1621 } 1622 1623 if (old_dir != new_dir) { 1624 /* Keep the same times on both directories.*/ 1625 inode_set_mtime_to_ts(new_dir, 1626 inode_set_ctime_to_ts(new_dir, inode_get_ctime(old_dir))); 1627 1628 /* 1629 * This will also pick up the i_nlink change from the 1630 * block above. 1631 */ 1632 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1633 } 1634 1635 if (old_dir_nlink != old_dir->i_nlink) { 1636 if (!old_dir_bh) { 1637 mlog(ML_ERROR, "need to change nlink for old dir " 1638 "%llu from %d to %d but bh is NULL!\n", 1639 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1640 (int)old_dir_nlink, old_dir->i_nlink); 1641 } else { 1642 struct ocfs2_dinode *fe; 1643 status = ocfs2_journal_access_di(handle, 1644 INODE_CACHE(old_dir), 1645 old_dir_bh, 1646 OCFS2_JOURNAL_ACCESS_WRITE); 1647 if (status < 0) { 1648 mlog_errno(status); 1649 goto bail; 1650 } 1651 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1652 ocfs2_set_links_count(fe, old_dir->i_nlink); 1653 ocfs2_journal_dirty(handle, old_dir_bh); 1654 } 1655 } 1656 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1657 status = 0; 1658bail: 1659 if (handle) 1660 ocfs2_commit_trans(osb, handle); 1661 1662 if (orphan_dir) { 1663 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1664 ocfs2_inode_unlock(orphan_dir, 1); 1665 inode_unlock(orphan_dir); 1666 iput(orphan_dir); 1667 } 1668 1669 if (new_child_locked) 1670 ocfs2_inode_unlock(new_inode, 1); 1671 1672 if (old_child_locked) 1673 ocfs2_inode_unlock(old_inode, 1); 1674 1675 if (parents_locked) 1676 ocfs2_double_unlock(old_dir, new_dir); 1677 1678 if (rename_lock) 1679 ocfs2_rename_unlock(osb); 1680 1681 if (new_inode) 1682 sync_mapping_buffers(old_inode->i_mapping); 1683 1684 iput(new_inode); 1685 1686 ocfs2_free_dir_lookup_result(&target_lookup_res); 1687 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1688 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1689 ocfs2_free_dir_lookup_result(&orphan_insert); 1690 ocfs2_free_dir_lookup_result(&target_insert); 1691 1692 brelse(newfe_bh); 1693 brelse(old_inode_bh); 1694 brelse(old_dir_bh); 1695 brelse(new_dir_bh); 1696 1697 if (status) 1698 mlog_errno(status); 1699 1700 return status; 1701} 1702 1703/* 1704 * we expect i_size = strlen(symname). Copy symname into the file 1705 * data, including the null terminator. 1706 */ 1707static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1708 handle_t *handle, 1709 struct inode *inode, 1710 const char *symname) 1711{ 1712 struct buffer_head **bhs = NULL; 1713 const char *c; 1714 struct super_block *sb = osb->sb; 1715 u64 p_blkno, p_blocks; 1716 int virtual, blocks, status, i, bytes_left; 1717 1718 bytes_left = i_size_read(inode) + 1; 1719 /* we can't trust i_blocks because we're actually going to 1720 * write i_size + 1 bytes. */ 1721 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1722 1723 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1724 i_size_read(inode), blocks); 1725 1726 /* Sanity check -- make sure we're going to fit. */ 1727 if (bytes_left > 1728 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1729 status = -EIO; 1730 mlog_errno(status); 1731 goto bail; 1732 } 1733 1734 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1735 if (!bhs) { 1736 status = -ENOMEM; 1737 mlog_errno(status); 1738 goto bail; 1739 } 1740 1741 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1742 NULL); 1743 if (status < 0) { 1744 mlog_errno(status); 1745 goto bail; 1746 } 1747 1748 /* links can never be larger than one cluster so we know this 1749 * is all going to be contiguous, but do a sanity check 1750 * anyway. */ 1751 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1752 status = -EIO; 1753 mlog_errno(status); 1754 goto bail; 1755 } 1756 1757 virtual = 0; 1758 while(bytes_left > 0) { 1759 c = &symname[virtual * sb->s_blocksize]; 1760 1761 bhs[virtual] = sb_getblk(sb, p_blkno); 1762 if (!bhs[virtual]) { 1763 status = -ENOMEM; 1764 mlog_errno(status); 1765 goto bail; 1766 } 1767 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1768 bhs[virtual]); 1769 1770 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1771 bhs[virtual], 1772 OCFS2_JOURNAL_ACCESS_CREATE); 1773 if (status < 0) { 1774 mlog_errno(status); 1775 goto bail; 1776 } 1777 1778 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1779 1780 memcpy(bhs[virtual]->b_data, c, 1781 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1782 bytes_left); 1783 1784 ocfs2_journal_dirty(handle, bhs[virtual]); 1785 1786 virtual++; 1787 p_blkno++; 1788 bytes_left -= sb->s_blocksize; 1789 } 1790 1791 status = 0; 1792bail: 1793 1794 if (bhs) { 1795 for(i = 0; i < blocks; i++) 1796 brelse(bhs[i]); 1797 kfree(bhs); 1798 } 1799 1800 if (status) 1801 mlog_errno(status); 1802 return status; 1803} 1804 1805static int ocfs2_symlink(struct mnt_idmap *idmap, 1806 struct inode *dir, 1807 struct dentry *dentry, 1808 const char *symname) 1809{ 1810 int status, l, credits; 1811 u64 newsize; 1812 struct ocfs2_super *osb = NULL; 1813 struct inode *inode = NULL; 1814 struct super_block *sb; 1815 struct buffer_head *new_fe_bh = NULL; 1816 struct buffer_head *parent_fe_bh = NULL; 1817 struct ocfs2_dinode *fe = NULL; 1818 struct ocfs2_dinode *dirfe; 1819 handle_t *handle = NULL; 1820 struct ocfs2_alloc_context *inode_ac = NULL; 1821 struct ocfs2_alloc_context *data_ac = NULL; 1822 struct ocfs2_alloc_context *xattr_ac = NULL; 1823 int want_clusters = 0; 1824 int xattr_credits = 0; 1825 struct ocfs2_security_xattr_info si = { 1826 .name = NULL, 1827 .enable = 1, 1828 }; 1829 int did_quota = 0, did_quota_inode = 0; 1830 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1831 sigset_t oldset; 1832 int did_block_signals = 0; 1833 struct ocfs2_dentry_lock *dl = NULL; 1834 1835 trace_ocfs2_symlink_begin(dir, dentry, symname, 1836 dentry->d_name.len, dentry->d_name.name); 1837 1838 status = dquot_initialize(dir); 1839 if (status) { 1840 mlog_errno(status); 1841 goto bail; 1842 } 1843 1844 sb = dir->i_sb; 1845 osb = OCFS2_SB(sb); 1846 1847 l = strlen(symname) + 1; 1848 1849 credits = ocfs2_calc_symlink_credits(sb); 1850 1851 /* lock the parent directory */ 1852 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1853 if (status < 0) { 1854 if (status != -ENOENT) 1855 mlog_errno(status); 1856 return status; 1857 } 1858 1859 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1860 if (!ocfs2_read_links_count(dirfe)) { 1861 /* can't make a file in a deleted directory. */ 1862 status = -ENOENT; 1863 goto bail; 1864 } 1865 1866 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1867 dentry->d_name.len); 1868 if (status) 1869 goto bail; 1870 1871 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1872 dentry->d_name.name, 1873 dentry->d_name.len, &lookup); 1874 if (status < 0) { 1875 mlog_errno(status); 1876 goto bail; 1877 } 1878 1879 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1880 if (status < 0) { 1881 if (status != -ENOSPC) 1882 mlog_errno(status); 1883 goto bail; 1884 } 1885 1886 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1887 if (IS_ERR(inode)) { 1888 status = PTR_ERR(inode); 1889 inode = NULL; 1890 mlog_errno(status); 1891 goto bail; 1892 } 1893 1894 /* get security xattr */ 1895 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1896 if (status) { 1897 if (status == -EOPNOTSUPP) 1898 si.enable = 0; 1899 else { 1900 mlog_errno(status); 1901 goto bail; 1902 } 1903 } 1904 1905 /* calculate meta data/clusters for setting security xattr */ 1906 if (si.enable) { 1907 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1908 &xattr_credits, &xattr_ac); 1909 if (status < 0) { 1910 mlog_errno(status); 1911 goto bail; 1912 } 1913 } 1914 1915 /* don't reserve bitmap space for fast symlinks. */ 1916 if (l > ocfs2_fast_symlink_chars(sb)) 1917 want_clusters += 1; 1918 1919 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1920 if (status < 0) { 1921 if (status != -ENOSPC) 1922 mlog_errno(status); 1923 goto bail; 1924 } 1925 1926 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1927 if (IS_ERR(handle)) { 1928 status = PTR_ERR(handle); 1929 handle = NULL; 1930 mlog_errno(status); 1931 goto bail; 1932 } 1933 1934 /* Starting to change things, restart is no longer possible. */ 1935 ocfs2_block_signals(&oldset); 1936 did_block_signals = 1; 1937 1938 status = dquot_alloc_inode(inode); 1939 if (status) 1940 goto bail; 1941 did_quota_inode = 1; 1942 1943 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1944 dentry->d_name.name, 1945 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1946 inode->i_mode); 1947 1948 status = ocfs2_mknod_locked(osb, dir, inode, 1949 0, &new_fe_bh, parent_fe_bh, handle, 1950 inode_ac); 1951 if (status < 0) { 1952 mlog_errno(status); 1953 goto bail; 1954 } 1955 1956 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1957 inode->i_rdev = 0; 1958 newsize = l - 1; 1959 inode->i_op = &ocfs2_symlink_inode_operations; 1960 inode_nohighmem(inode); 1961 if (l > ocfs2_fast_symlink_chars(sb)) { 1962 u32 offset = 0; 1963 1964 status = dquot_alloc_space_nodirty(inode, 1965 ocfs2_clusters_to_bytes(osb->sb, 1)); 1966 if (status) 1967 goto bail; 1968 did_quota = 1; 1969 inode->i_mapping->a_ops = &ocfs2_aops; 1970 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1971 new_fe_bh, 1972 handle, data_ac, NULL, 1973 NULL); 1974 if (status < 0) { 1975 if (status != -ENOSPC && status != -EINTR) { 1976 mlog(ML_ERROR, 1977 "Failed to extend file to %llu\n", 1978 (unsigned long long)newsize); 1979 mlog_errno(status); 1980 status = -ENOSPC; 1981 } 1982 goto bail; 1983 } 1984 i_size_write(inode, newsize); 1985 inode->i_blocks = ocfs2_inode_sector_count(inode); 1986 } else { 1987 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1988 memcpy((char *) fe->id2.i_symlink, symname, l); 1989 i_size_write(inode, newsize); 1990 inode->i_blocks = 0; 1991 } 1992 1993 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1994 if (status < 0) { 1995 mlog_errno(status); 1996 goto bail; 1997 } 1998 1999 if (!ocfs2_inode_is_fast_symlink(inode)) { 2000 status = ocfs2_create_symlink_data(osb, handle, inode, 2001 symname); 2002 if (status < 0) { 2003 mlog_errno(status); 2004 goto bail; 2005 } 2006 } 2007 2008 if (si.enable) { 2009 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 2010 xattr_ac, data_ac); 2011 if (status < 0) { 2012 mlog_errno(status); 2013 goto bail; 2014 } 2015 } 2016 2017 /* 2018 * Do this before adding the entry to the directory. We add 2019 * also set d_op after success so that ->d_iput() will cleanup 2020 * the dentry lock even if ocfs2_add_entry() fails below. 2021 */ 2022 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2023 if (status) { 2024 mlog_errno(status); 2025 goto bail; 2026 } 2027 2028 dl = dentry->d_fsdata; 2029 2030 status = ocfs2_add_entry(handle, dentry, inode, 2031 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2032 &lookup); 2033 if (status < 0) { 2034 mlog_errno(status); 2035 goto bail; 2036 } 2037 2038 insert_inode_hash(inode); 2039 d_instantiate(dentry, inode); 2040bail: 2041 if (status < 0 && did_quota) 2042 dquot_free_space_nodirty(inode, 2043 ocfs2_clusters_to_bytes(osb->sb, 1)); 2044 if (status < 0 && did_quota_inode) 2045 dquot_free_inode(inode); 2046 if (handle) { 2047 if (status < 0 && fe) 2048 ocfs2_set_links_count(fe, 0); 2049 ocfs2_commit_trans(osb, handle); 2050 } 2051 2052 ocfs2_inode_unlock(dir, 1); 2053 if (did_block_signals) 2054 ocfs2_unblock_signals(&oldset); 2055 2056 brelse(new_fe_bh); 2057 brelse(parent_fe_bh); 2058 kfree(si.value); 2059 ocfs2_free_dir_lookup_result(&lookup); 2060 if (inode_ac) 2061 ocfs2_free_alloc_context(inode_ac); 2062 if (data_ac) 2063 ocfs2_free_alloc_context(data_ac); 2064 if (xattr_ac) 2065 ocfs2_free_alloc_context(xattr_ac); 2066 if ((status < 0) && inode) { 2067 if (dl) 2068 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2069 2070 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2071 clear_nlink(inode); 2072 iput(inode); 2073 } 2074 2075 if (status) 2076 mlog_errno(status); 2077 2078 return status; 2079} 2080 2081static int ocfs2_blkno_stringify(u64 blkno, char *name) 2082{ 2083 int status, namelen; 2084 2085 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2086 (long long)blkno); 2087 if (namelen <= 0) { 2088 if (namelen) 2089 status = namelen; 2090 else 2091 status = -EINVAL; 2092 mlog_errno(status); 2093 goto bail; 2094 } 2095 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2096 status = -EINVAL; 2097 mlog_errno(status); 2098 goto bail; 2099 } 2100 2101 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2102 2103 status = 0; 2104bail: 2105 if (status < 0) 2106 mlog_errno(status); 2107 return status; 2108} 2109 2110static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2111 struct inode **ret_orphan_dir, 2112 struct buffer_head **ret_orphan_dir_bh) 2113{ 2114 struct inode *orphan_dir_inode; 2115 struct buffer_head *orphan_dir_bh = NULL; 2116 int ret = 0; 2117 2118 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2119 ORPHAN_DIR_SYSTEM_INODE, 2120 osb->slot_num); 2121 if (!orphan_dir_inode) { 2122 ret = -ENOENT; 2123 mlog_errno(ret); 2124 return ret; 2125 } 2126 2127 inode_lock(orphan_dir_inode); 2128 2129 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2130 if (ret < 0) { 2131 inode_unlock(orphan_dir_inode); 2132 iput(orphan_dir_inode); 2133 2134 mlog_errno(ret); 2135 return ret; 2136 } 2137 2138 *ret_orphan_dir = orphan_dir_inode; 2139 *ret_orphan_dir_bh = orphan_dir_bh; 2140 2141 return 0; 2142} 2143 2144static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2145 struct buffer_head *orphan_dir_bh, 2146 u64 blkno, 2147 char *name, 2148 struct ocfs2_dir_lookup_result *lookup, 2149 bool dio) 2150{ 2151 int ret; 2152 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2153 int namelen = dio ? 2154 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2155 OCFS2_ORPHAN_NAMELEN; 2156 2157 if (dio) { 2158 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2159 OCFS2_DIO_ORPHAN_PREFIX); 2160 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2161 ret = -EINVAL; 2162 mlog_errno(ret); 2163 return ret; 2164 } 2165 2166 ret = ocfs2_blkno_stringify(blkno, 2167 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2168 } else 2169 ret = ocfs2_blkno_stringify(blkno, name); 2170 if (ret < 0) { 2171 mlog_errno(ret); 2172 return ret; 2173 } 2174 2175 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2176 orphan_dir_bh, name, 2177 namelen, lookup); 2178 if (ret < 0) { 2179 mlog_errno(ret); 2180 return ret; 2181 } 2182 2183 return 0; 2184} 2185 2186/** 2187 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2188 * insertion of an orphan. 2189 * @osb: ocfs2 file system 2190 * @ret_orphan_dir: Orphan dir inode - returned locked! 2191 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2192 * @lookup: dir lookup result, to be passed back into functions like 2193 * ocfs2_orphan_add 2194 * 2195 * Returns zero on success and the ret_orphan_dir, name and lookup 2196 * fields will be populated. 2197 * 2198 * Returns non-zero on failure. 2199 */ 2200static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2201 struct inode **ret_orphan_dir, 2202 u64 blkno, 2203 char *name, 2204 struct ocfs2_dir_lookup_result *lookup, 2205 bool dio) 2206{ 2207 struct inode *orphan_dir_inode = NULL; 2208 struct buffer_head *orphan_dir_bh = NULL; 2209 int ret = 0; 2210 2211 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2212 &orphan_dir_bh); 2213 if (ret < 0) { 2214 mlog_errno(ret); 2215 return ret; 2216 } 2217 2218 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2219 blkno, name, lookup, dio); 2220 if (ret < 0) { 2221 mlog_errno(ret); 2222 goto out; 2223 } 2224 2225 *ret_orphan_dir = orphan_dir_inode; 2226 2227out: 2228 brelse(orphan_dir_bh); 2229 2230 if (ret) { 2231 ocfs2_inode_unlock(orphan_dir_inode, 1); 2232 inode_unlock(orphan_dir_inode); 2233 iput(orphan_dir_inode); 2234 } 2235 2236 if (ret) 2237 mlog_errno(ret); 2238 return ret; 2239} 2240 2241static int ocfs2_orphan_add(struct ocfs2_super *osb, 2242 handle_t *handle, 2243 struct inode *inode, 2244 struct buffer_head *fe_bh, 2245 char *name, 2246 struct ocfs2_dir_lookup_result *lookup, 2247 struct inode *orphan_dir_inode, 2248 bool dio) 2249{ 2250 struct buffer_head *orphan_dir_bh = NULL; 2251 int status = 0; 2252 struct ocfs2_dinode *orphan_fe; 2253 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2254 int namelen = dio ? 2255 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2256 OCFS2_ORPHAN_NAMELEN; 2257 2258 trace_ocfs2_orphan_add_begin( 2259 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2260 2261 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2262 if (status < 0) { 2263 mlog_errno(status); 2264 goto leave; 2265 } 2266 2267 status = ocfs2_journal_access_di(handle, 2268 INODE_CACHE(orphan_dir_inode), 2269 orphan_dir_bh, 2270 OCFS2_JOURNAL_ACCESS_WRITE); 2271 if (status < 0) { 2272 mlog_errno(status); 2273 goto leave; 2274 } 2275 2276 /* 2277 * We're going to journal the change of i_flags and i_orphaned_slot. 2278 * It's safe anyway, though some callers may duplicate the journaling. 2279 * Journaling within the func just make the logic look more 2280 * straightforward. 2281 */ 2282 status = ocfs2_journal_access_di(handle, 2283 INODE_CACHE(inode), 2284 fe_bh, 2285 OCFS2_JOURNAL_ACCESS_WRITE); 2286 if (status < 0) { 2287 mlog_errno(status); 2288 goto leave; 2289 } 2290 2291 /* we're a cluster, and nlink can change on disk from 2292 * underneath us... */ 2293 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2294 if (S_ISDIR(inode->i_mode)) 2295 ocfs2_add_links_count(orphan_fe, 1); 2296 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2297 ocfs2_journal_dirty(handle, orphan_dir_bh); 2298 2299 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2300 namelen, inode, 2301 OCFS2_I(inode)->ip_blkno, 2302 orphan_dir_bh, lookup); 2303 if (status < 0) { 2304 mlog_errno(status); 2305 goto rollback; 2306 } 2307 2308 if (dio) { 2309 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2310 * slot. 2311 */ 2312 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2313 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2314 } else { 2315 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2316 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2317 2318 /* Record which orphan dir our inode now resides 2319 * in. delete_inode will use this to determine which orphan 2320 * dir to lock. */ 2321 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2322 } 2323 2324 ocfs2_journal_dirty(handle, fe_bh); 2325 2326 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2327 osb->slot_num); 2328 2329rollback: 2330 if (status < 0) { 2331 if (S_ISDIR(inode->i_mode)) 2332 ocfs2_add_links_count(orphan_fe, -1); 2333 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2334 } 2335 2336leave: 2337 brelse(orphan_dir_bh); 2338 2339 return status; 2340} 2341 2342/* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2343int ocfs2_orphan_del(struct ocfs2_super *osb, 2344 handle_t *handle, 2345 struct inode *orphan_dir_inode, 2346 struct inode *inode, 2347 struct buffer_head *orphan_dir_bh, 2348 bool dio) 2349{ 2350 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2351 struct ocfs2_dinode *orphan_fe; 2352 int status = 0; 2353 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2354 2355 if (dio) { 2356 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2357 OCFS2_DIO_ORPHAN_PREFIX); 2358 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2359 status = -EINVAL; 2360 mlog_errno(status); 2361 return status; 2362 } 2363 2364 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2365 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2366 } else 2367 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2368 if (status < 0) { 2369 mlog_errno(status); 2370 goto leave; 2371 } 2372 2373 trace_ocfs2_orphan_del( 2374 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2375 name, strlen(name)); 2376 2377 status = ocfs2_journal_access_di(handle, 2378 INODE_CACHE(orphan_dir_inode), 2379 orphan_dir_bh, 2380 OCFS2_JOURNAL_ACCESS_WRITE); 2381 if (status < 0) { 2382 mlog_errno(status); 2383 goto leave; 2384 } 2385 2386 /* find it's spot in the orphan directory */ 2387 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2388 &lookup); 2389 if (status) { 2390 mlog_errno(status); 2391 goto leave; 2392 } 2393 2394 /* remove it from the orphan directory */ 2395 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2396 if (status < 0) { 2397 mlog_errno(status); 2398 goto leave; 2399 } 2400 2401 /* do the i_nlink dance! :) */ 2402 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2403 if (S_ISDIR(inode->i_mode)) 2404 ocfs2_add_links_count(orphan_fe, -1); 2405 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2406 ocfs2_journal_dirty(handle, orphan_dir_bh); 2407 2408leave: 2409 ocfs2_free_dir_lookup_result(&lookup); 2410 2411 if (status) 2412 mlog_errno(status); 2413 return status; 2414} 2415 2416/** 2417 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2418 * allocated file. This is different from the typical 'add to orphan dir' 2419 * operation in that the inode does not yet exist. This is a problem because 2420 * the orphan dir stringifies the inode block number to come up with it's 2421 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2422 * problem. This function works around it by calling deeper into the orphan 2423 * and suballoc code than other callers. Use this only by necessity. 2424 * @dir: The directory which this inode will ultimately wind up under - not the 2425 * orphan dir! 2426 * @dir_bh: buffer_head the @dir inode block 2427 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2428 * with the string to be used for orphan dirent. Pass back to the orphan dir 2429 * code. 2430 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2431 * dir code. 2432 * @ret_di_blkno: block number where the new inode will be allocated. 2433 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2434 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2435 * 2436 * Returns zero on success and the ret_orphan_dir, name and lookup 2437 * fields will be populated. 2438 * 2439 * Returns non-zero on failure. 2440 */ 2441static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2442 struct buffer_head *dir_bh, 2443 char *orphan_name, 2444 struct inode **ret_orphan_dir, 2445 u64 *ret_di_blkno, 2446 struct ocfs2_dir_lookup_result *orphan_insert, 2447 struct ocfs2_alloc_context **ret_inode_ac) 2448{ 2449 int ret; 2450 u64 di_blkno; 2451 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2452 struct inode *orphan_dir = NULL; 2453 struct buffer_head *orphan_dir_bh = NULL; 2454 struct ocfs2_alloc_context *inode_ac = NULL; 2455 2456 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2457 if (ret < 0) { 2458 mlog_errno(ret); 2459 return ret; 2460 } 2461 2462 /* reserve an inode spot */ 2463 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2464 if (ret < 0) { 2465 if (ret != -ENOSPC) 2466 mlog_errno(ret); 2467 goto out; 2468 } 2469 2470 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2471 &di_blkno); 2472 if (ret) { 2473 mlog_errno(ret); 2474 goto out; 2475 } 2476 2477 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2478 di_blkno, orphan_name, orphan_insert, 2479 false); 2480 if (ret < 0) { 2481 mlog_errno(ret); 2482 goto out; 2483 } 2484 2485out: 2486 if (ret == 0) { 2487 *ret_orphan_dir = orphan_dir; 2488 *ret_di_blkno = di_blkno; 2489 *ret_inode_ac = inode_ac; 2490 /* 2491 * orphan_name and orphan_insert are already up to 2492 * date via prepare_orphan_dir 2493 */ 2494 } else { 2495 /* Unroll reserve_new_inode* */ 2496 if (inode_ac) 2497 ocfs2_free_alloc_context(inode_ac); 2498 2499 /* Unroll orphan dir locking */ 2500 inode_unlock(orphan_dir); 2501 ocfs2_inode_unlock(orphan_dir, 1); 2502 iput(orphan_dir); 2503 } 2504 2505 brelse(orphan_dir_bh); 2506 2507 return ret; 2508} 2509 2510int ocfs2_create_inode_in_orphan(struct inode *dir, 2511 int mode, 2512 struct inode **new_inode) 2513{ 2514 int status, did_quota_inode = 0; 2515 struct inode *inode = NULL; 2516 struct inode *orphan_dir = NULL; 2517 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2518 handle_t *handle = NULL; 2519 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2520 struct buffer_head *parent_di_bh = NULL; 2521 struct buffer_head *new_di_bh = NULL; 2522 struct ocfs2_alloc_context *inode_ac = NULL; 2523 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2524 u64 di_blkno, suballoc_loc; 2525 u16 suballoc_bit; 2526 2527 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2528 if (status < 0) { 2529 if (status != -ENOENT) 2530 mlog_errno(status); 2531 return status; 2532 } 2533 2534 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2535 orphan_name, &orphan_dir, 2536 &di_blkno, &orphan_insert, &inode_ac); 2537 if (status < 0) { 2538 if (status != -ENOSPC) 2539 mlog_errno(status); 2540 goto leave; 2541 } 2542 2543 inode = ocfs2_get_init_inode(dir, mode); 2544 if (IS_ERR(inode)) { 2545 status = PTR_ERR(inode); 2546 inode = NULL; 2547 mlog_errno(status); 2548 goto leave; 2549 } 2550 2551 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2552 if (IS_ERR(handle)) { 2553 status = PTR_ERR(handle); 2554 handle = NULL; 2555 mlog_errno(status); 2556 goto leave; 2557 } 2558 2559 status = dquot_alloc_inode(inode); 2560 if (status) 2561 goto leave; 2562 did_quota_inode = 1; 2563 2564 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2565 &suballoc_loc, 2566 &suballoc_bit, di_blkno); 2567 if (status < 0) { 2568 mlog_errno(status); 2569 goto leave; 2570 } 2571 2572 clear_nlink(inode); 2573 /* do the real work now. */ 2574 status = __ocfs2_mknod_locked(dir, inode, 2575 0, &new_di_bh, parent_di_bh, handle, 2576 inode_ac, di_blkno, suballoc_loc, 2577 suballoc_bit); 2578 if (status < 0) { 2579 mlog_errno(status); 2580 goto leave; 2581 } 2582 2583 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2584 &orphan_insert, orphan_dir, false); 2585 if (status < 0) { 2586 mlog_errno(status); 2587 goto leave; 2588 } 2589 2590 /* get open lock so that only nodes can't remove it from orphan dir. */ 2591 status = ocfs2_open_lock(inode); 2592 if (status < 0) 2593 mlog_errno(status); 2594 2595 insert_inode_hash(inode); 2596leave: 2597 if (status < 0 && did_quota_inode) 2598 dquot_free_inode(inode); 2599 if (handle) 2600 ocfs2_commit_trans(osb, handle); 2601 2602 if (orphan_dir) { 2603 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2604 ocfs2_inode_unlock(orphan_dir, 1); 2605 inode_unlock(orphan_dir); 2606 iput(orphan_dir); 2607 } 2608 2609 if ((status < 0) && inode) { 2610 clear_nlink(inode); 2611 iput(inode); 2612 } 2613 2614 if (inode_ac) 2615 ocfs2_free_alloc_context(inode_ac); 2616 2617 brelse(new_di_bh); 2618 2619 if (!status) 2620 *new_inode = inode; 2621 2622 ocfs2_free_dir_lookup_result(&orphan_insert); 2623 2624 ocfs2_inode_unlock(dir, 1); 2625 brelse(parent_di_bh); 2626 return status; 2627} 2628 2629int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2630 struct inode *inode) 2631{ 2632 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2633 struct inode *orphan_dir_inode = NULL; 2634 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2635 struct buffer_head *di_bh = NULL; 2636 int status = 0; 2637 handle_t *handle = NULL; 2638 struct ocfs2_dinode *di = NULL; 2639 2640 status = ocfs2_inode_lock(inode, &di_bh, 1); 2641 if (status < 0) { 2642 mlog_errno(status); 2643 goto bail; 2644 } 2645 2646 di = (struct ocfs2_dinode *) di_bh->b_data; 2647 /* 2648 * Another append dio crashed? 2649 * If so, manually recover it first. 2650 */ 2651 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2652 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2653 if (status < 0) { 2654 if (status != -ENOSPC) 2655 mlog_errno(status); 2656 goto bail_unlock_inode; 2657 } 2658 2659 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2660 if (status < 0) { 2661 mlog_errno(status); 2662 goto bail_unlock_inode; 2663 } 2664 } 2665 2666 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2667 OCFS2_I(inode)->ip_blkno, 2668 orphan_name, 2669 &orphan_insert, 2670 true); 2671 if (status < 0) { 2672 mlog_errno(status); 2673 goto bail_unlock_inode; 2674 } 2675 2676 handle = ocfs2_start_trans(osb, 2677 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2678 if (IS_ERR(handle)) { 2679 status = PTR_ERR(handle); 2680 goto bail_unlock_orphan; 2681 } 2682 2683 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2684 &orphan_insert, orphan_dir_inode, true); 2685 if (status) 2686 mlog_errno(status); 2687 2688 ocfs2_commit_trans(osb, handle); 2689 2690bail_unlock_orphan: 2691 ocfs2_inode_unlock(orphan_dir_inode, 1); 2692 inode_unlock(orphan_dir_inode); 2693 iput(orphan_dir_inode); 2694 2695 ocfs2_free_dir_lookup_result(&orphan_insert); 2696 2697bail_unlock_inode: 2698 ocfs2_inode_unlock(inode, 1); 2699 brelse(di_bh); 2700 2701bail: 2702 return status; 2703} 2704 2705int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2706 struct inode *inode, struct buffer_head *di_bh, 2707 int update_isize, loff_t end) 2708{ 2709 struct inode *orphan_dir_inode = NULL; 2710 struct buffer_head *orphan_dir_bh = NULL; 2711 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2712 handle_t *handle = NULL; 2713 int status = 0; 2714 2715 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2716 ORPHAN_DIR_SYSTEM_INODE, 2717 le16_to_cpu(di->i_dio_orphaned_slot)); 2718 if (!orphan_dir_inode) { 2719 status = -ENOENT; 2720 mlog_errno(status); 2721 goto bail; 2722 } 2723 2724 inode_lock(orphan_dir_inode); 2725 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2726 if (status < 0) { 2727 inode_unlock(orphan_dir_inode); 2728 iput(orphan_dir_inode); 2729 mlog_errno(status); 2730 goto bail; 2731 } 2732 2733 handle = ocfs2_start_trans(osb, 2734 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2735 if (IS_ERR(handle)) { 2736 status = PTR_ERR(handle); 2737 goto bail_unlock_orphan; 2738 } 2739 2740 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2741 2742 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2743 inode, orphan_dir_bh, true); 2744 if (status < 0) { 2745 mlog_errno(status); 2746 goto bail_commit; 2747 } 2748 2749 status = ocfs2_journal_access_di(handle, 2750 INODE_CACHE(inode), 2751 di_bh, 2752 OCFS2_JOURNAL_ACCESS_WRITE); 2753 if (status < 0) { 2754 mlog_errno(status); 2755 goto bail_commit; 2756 } 2757 2758 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2759 di->i_dio_orphaned_slot = 0; 2760 2761 if (update_isize) { 2762 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2763 if (status) 2764 mlog_errno(status); 2765 } else 2766 ocfs2_journal_dirty(handle, di_bh); 2767 2768bail_commit: 2769 ocfs2_commit_trans(osb, handle); 2770 2771bail_unlock_orphan: 2772 ocfs2_inode_unlock(orphan_dir_inode, 1); 2773 inode_unlock(orphan_dir_inode); 2774 brelse(orphan_dir_bh); 2775 iput(orphan_dir_inode); 2776 2777bail: 2778 return status; 2779} 2780 2781int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2782 struct inode *inode, 2783 struct dentry *dentry) 2784{ 2785 int status = 0; 2786 struct buffer_head *parent_di_bh = NULL; 2787 handle_t *handle = NULL; 2788 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2789 struct ocfs2_dinode *dir_di, *di; 2790 struct inode *orphan_dir_inode = NULL; 2791 struct buffer_head *orphan_dir_bh = NULL; 2792 struct buffer_head *di_bh = NULL; 2793 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2794 2795 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2796 dentry->d_name.len, dentry->d_name.name, 2797 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2798 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2799 2800 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2801 if (status < 0) { 2802 if (status != -ENOENT) 2803 mlog_errno(status); 2804 return status; 2805 } 2806 2807 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2808 if (!dir_di->i_links_count) { 2809 /* can't make a file in a deleted directory. */ 2810 status = -ENOENT; 2811 goto leave; 2812 } 2813 2814 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2815 dentry->d_name.len); 2816 if (status) 2817 goto leave; 2818 2819 /* get a spot inside the dir. */ 2820 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2821 dentry->d_name.name, 2822 dentry->d_name.len, &lookup); 2823 if (status < 0) { 2824 mlog_errno(status); 2825 goto leave; 2826 } 2827 2828 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2829 ORPHAN_DIR_SYSTEM_INODE, 2830 osb->slot_num); 2831 if (!orphan_dir_inode) { 2832 status = -ENOENT; 2833 mlog_errno(status); 2834 goto leave; 2835 } 2836 2837 inode_lock(orphan_dir_inode); 2838 2839 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2840 if (status < 0) { 2841 mlog_errno(status); 2842 inode_unlock(orphan_dir_inode); 2843 iput(orphan_dir_inode); 2844 goto leave; 2845 } 2846 2847 status = ocfs2_read_inode_block(inode, &di_bh); 2848 if (status < 0) { 2849 mlog_errno(status); 2850 goto orphan_unlock; 2851 } 2852 2853 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2854 if (IS_ERR(handle)) { 2855 status = PTR_ERR(handle); 2856 handle = NULL; 2857 mlog_errno(status); 2858 goto orphan_unlock; 2859 } 2860 2861 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2862 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2863 if (status < 0) { 2864 mlog_errno(status); 2865 goto out_commit; 2866 } 2867 2868 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2869 orphan_dir_bh, false); 2870 if (status < 0) { 2871 mlog_errno(status); 2872 goto out_commit; 2873 } 2874 2875 di = (struct ocfs2_dinode *)di_bh->b_data; 2876 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2877 di->i_orphaned_slot = 0; 2878 set_nlink(inode, 1); 2879 ocfs2_set_links_count(di, inode->i_nlink); 2880 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2881 ocfs2_journal_dirty(handle, di_bh); 2882 2883 status = ocfs2_add_entry(handle, dentry, inode, 2884 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2885 &lookup); 2886 if (status < 0) { 2887 mlog_errno(status); 2888 goto out_commit; 2889 } 2890 2891 status = ocfs2_dentry_attach_lock(dentry, inode, 2892 OCFS2_I(dir)->ip_blkno); 2893 if (status) { 2894 mlog_errno(status); 2895 goto out_commit; 2896 } 2897 2898 d_instantiate(dentry, inode); 2899 status = 0; 2900out_commit: 2901 ocfs2_commit_trans(osb, handle); 2902orphan_unlock: 2903 ocfs2_inode_unlock(orphan_dir_inode, 1); 2904 inode_unlock(orphan_dir_inode); 2905 iput(orphan_dir_inode); 2906leave: 2907 2908 ocfs2_inode_unlock(dir, 1); 2909 2910 brelse(di_bh); 2911 brelse(parent_di_bh); 2912 brelse(orphan_dir_bh); 2913 2914 ocfs2_free_dir_lookup_result(&lookup); 2915 2916 if (status) 2917 mlog_errno(status); 2918 2919 return status; 2920} 2921 2922const struct inode_operations ocfs2_dir_iops = { 2923 .create = ocfs2_create, 2924 .lookup = ocfs2_lookup, 2925 .link = ocfs2_link, 2926 .unlink = ocfs2_unlink, 2927 .rmdir = ocfs2_unlink, 2928 .symlink = ocfs2_symlink, 2929 .mkdir = ocfs2_mkdir, 2930 .mknod = ocfs2_mknod, 2931 .rename = ocfs2_rename, 2932 .setattr = ocfs2_setattr, 2933 .getattr = ocfs2_getattr, 2934 .permission = ocfs2_permission, 2935 .listxattr = ocfs2_listxattr, 2936 .fiemap = ocfs2_fiemap, 2937 .get_inode_acl = ocfs2_iop_get_acl, 2938 .set_acl = ocfs2_iop_set_acl, 2939 .fileattr_get = ocfs2_fileattr_get, 2940 .fileattr_set = ocfs2_fileattr_set, 2941}; 2942