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_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(inode).tv_sec); 799 fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime(inode).tv_nsec); 800 ocfs2_journal_dirty(handle, fe_bh); 801 802 err = ocfs2_add_entry(handle, dentry, inode, 803 OCFS2_I(inode)->ip_blkno, 804 parent_fe_bh, &lookup); 805 if (err) { 806 ocfs2_add_links_count(fe, -1); 807 drop_nlink(inode); 808 mlog_errno(err); 809 goto out_commit; 810 } 811 812 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 813 if (err) { 814 mlog_errno(err); 815 goto out_commit; 816 } 817 818 ihold(inode); 819 d_instantiate(dentry, inode); 820 821out_commit: 822 ocfs2_commit_trans(osb, handle); 823 ocfs2_unblock_signals(&oldset); 824out_unlock_inode: 825 ocfs2_inode_unlock(inode, 1); 826 827out: 828 ocfs2_double_unlock(old_dir, dir); 829 830 brelse(fe_bh); 831 brelse(parent_fe_bh); 832 brelse(old_dir_bh); 833 834 ocfs2_free_dir_lookup_result(&lookup); 835 836 if (err) 837 mlog_errno(err); 838 839 return err; 840} 841 842/* 843 * Takes and drops an exclusive lock on the given dentry. This will 844 * force other nodes to drop it. 845 */ 846static int ocfs2_remote_dentry_delete(struct dentry *dentry) 847{ 848 int ret; 849 850 ret = ocfs2_dentry_lock(dentry, 1); 851 if (ret) 852 mlog_errno(ret); 853 else 854 ocfs2_dentry_unlock(dentry, 1); 855 856 return ret; 857} 858 859static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 860{ 861 if (S_ISDIR(inode->i_mode)) { 862 if (inode->i_nlink == 2) 863 return 1; 864 return 0; 865 } 866 867 if (inode->i_nlink == 1) 868 return 1; 869 return 0; 870} 871 872static int ocfs2_unlink(struct inode *dir, 873 struct dentry *dentry) 874{ 875 int status; 876 int child_locked = 0; 877 bool is_unlinkable = false; 878 struct inode *inode = d_inode(dentry); 879 struct inode *orphan_dir = NULL; 880 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 881 u64 blkno; 882 struct ocfs2_dinode *fe = NULL; 883 struct buffer_head *fe_bh = NULL; 884 struct buffer_head *parent_node_bh = NULL; 885 handle_t *handle = NULL; 886 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 887 struct ocfs2_dir_lookup_result lookup = { NULL, }; 888 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 889 890 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 891 dentry->d_name.name, 892 (unsigned long long)OCFS2_I(dir)->ip_blkno, 893 (unsigned long long)OCFS2_I(inode)->ip_blkno); 894 895 status = dquot_initialize(dir); 896 if (status) { 897 mlog_errno(status); 898 return status; 899 } 900 901 BUG_ON(d_inode(dentry->d_parent) != dir); 902 903 if (inode == osb->root_inode) 904 return -EPERM; 905 906 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 907 OI_LS_PARENT); 908 if (status < 0) { 909 if (status != -ENOENT) 910 mlog_errno(status); 911 return status; 912 } 913 914 status = ocfs2_find_files_on_disk(dentry->d_name.name, 915 dentry->d_name.len, &blkno, dir, 916 &lookup); 917 if (status < 0) { 918 if (status != -ENOENT) 919 mlog_errno(status); 920 goto leave; 921 } 922 923 if (OCFS2_I(inode)->ip_blkno != blkno) { 924 status = -ENOENT; 925 926 trace_ocfs2_unlink_noent( 927 (unsigned long long)OCFS2_I(inode)->ip_blkno, 928 (unsigned long long)blkno, 929 OCFS2_I(inode)->ip_flags); 930 goto leave; 931 } 932 933 status = ocfs2_inode_lock(inode, &fe_bh, 1); 934 if (status < 0) { 935 if (status != -ENOENT) 936 mlog_errno(status); 937 goto leave; 938 } 939 child_locked = 1; 940 941 if (S_ISDIR(inode->i_mode)) { 942 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 943 status = -ENOTEMPTY; 944 goto leave; 945 } 946 } 947 948 status = ocfs2_remote_dentry_delete(dentry); 949 if (status < 0) { 950 /* This remote delete should succeed under all normal 951 * circumstances. */ 952 mlog_errno(status); 953 goto leave; 954 } 955 956 if (ocfs2_inode_is_unlinkable(inode)) { 957 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 958 OCFS2_I(inode)->ip_blkno, 959 orphan_name, &orphan_insert, 960 false); 961 if (status < 0) { 962 mlog_errno(status); 963 goto leave; 964 } 965 is_unlinkable = true; 966 } 967 968 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 969 if (IS_ERR(handle)) { 970 status = PTR_ERR(handle); 971 handle = NULL; 972 mlog_errno(status); 973 goto leave; 974 } 975 976 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 977 OCFS2_JOURNAL_ACCESS_WRITE); 978 if (status < 0) { 979 mlog_errno(status); 980 goto leave; 981 } 982 983 fe = (struct ocfs2_dinode *) fe_bh->b_data; 984 985 /* delete the name from the parent dir */ 986 status = ocfs2_delete_entry(handle, dir, &lookup); 987 if (status < 0) { 988 mlog_errno(status); 989 goto leave; 990 } 991 992 if (S_ISDIR(inode->i_mode)) 993 drop_nlink(inode); 994 drop_nlink(inode); 995 ocfs2_set_links_count(fe, inode->i_nlink); 996 ocfs2_journal_dirty(handle, fe_bh); 997 998 dir->i_mtime = inode_set_ctime_current(dir); 999 if (S_ISDIR(inode->i_mode)) 1000 drop_nlink(dir); 1001 1002 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1003 if (status < 0) { 1004 mlog_errno(status); 1005 if (S_ISDIR(inode->i_mode)) 1006 inc_nlink(dir); 1007 goto leave; 1008 } 1009 1010 if (is_unlinkable) { 1011 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1012 orphan_name, &orphan_insert, orphan_dir, false); 1013 if (status < 0) 1014 mlog_errno(status); 1015 } 1016 1017leave: 1018 if (handle) 1019 ocfs2_commit_trans(osb, handle); 1020 1021 if (orphan_dir) { 1022 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1023 ocfs2_inode_unlock(orphan_dir, 1); 1024 inode_unlock(orphan_dir); 1025 iput(orphan_dir); 1026 } 1027 1028 if (child_locked) 1029 ocfs2_inode_unlock(inode, 1); 1030 1031 ocfs2_inode_unlock(dir, 1); 1032 1033 brelse(fe_bh); 1034 brelse(parent_node_bh); 1035 1036 ocfs2_free_dir_lookup_result(&orphan_insert); 1037 ocfs2_free_dir_lookup_result(&lookup); 1038 1039 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1040 mlog_errno(status); 1041 1042 return status; 1043} 1044 1045static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1046 u64 src_inode_no, u64 dest_inode_no) 1047{ 1048 int ret = 0, i = 0; 1049 u64 parent_inode_no = 0; 1050 u64 child_inode_no = src_inode_no; 1051 struct inode *child_inode; 1052 1053#define MAX_LOOKUP_TIMES 32 1054 while (1) { 1055 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1056 if (IS_ERR(child_inode)) { 1057 ret = PTR_ERR(child_inode); 1058 break; 1059 } 1060 1061 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1062 if (ret < 0) { 1063 iput(child_inode); 1064 if (ret != -ENOENT) 1065 mlog_errno(ret); 1066 break; 1067 } 1068 1069 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1070 &parent_inode_no); 1071 ocfs2_inode_unlock(child_inode, 0); 1072 iput(child_inode); 1073 if (ret < 0) { 1074 ret = -ENOENT; 1075 break; 1076 } 1077 1078 if (parent_inode_no == dest_inode_no) { 1079 ret = 1; 1080 break; 1081 } 1082 1083 if (parent_inode_no == osb->root_inode->i_ino) { 1084 ret = 0; 1085 break; 1086 } 1087 1088 child_inode_no = parent_inode_no; 1089 1090 if (++i >= MAX_LOOKUP_TIMES) { 1091 mlog_ratelimited(ML_NOTICE, "max lookup times reached, " 1092 "filesystem may have nested directories, " 1093 "src inode: %llu, dest inode: %llu.\n", 1094 (unsigned long long)src_inode_no, 1095 (unsigned long long)dest_inode_no); 1096 ret = 0; 1097 break; 1098 } 1099 } 1100 1101 return ret; 1102} 1103 1104/* 1105 * The only place this should be used is rename and link! 1106 * if they have the same id, then the 1st one is the only one locked. 1107 */ 1108static int ocfs2_double_lock(struct ocfs2_super *osb, 1109 struct buffer_head **bh1, 1110 struct inode *inode1, 1111 struct buffer_head **bh2, 1112 struct inode *inode2, 1113 int rename) 1114{ 1115 int status; 1116 int inode1_is_ancestor, inode2_is_ancestor; 1117 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1118 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1119 1120 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1121 (unsigned long long)oi2->ip_blkno); 1122 1123 if (*bh1) 1124 *bh1 = NULL; 1125 if (*bh2) 1126 *bh2 = NULL; 1127 1128 /* we always want to lock the one with the lower lockid first. 1129 * and if they are nested, we lock ancestor first */ 1130 if (oi1->ip_blkno != oi2->ip_blkno) { 1131 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1132 oi1->ip_blkno); 1133 if (inode1_is_ancestor < 0) { 1134 status = inode1_is_ancestor; 1135 goto bail; 1136 } 1137 1138 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1139 oi2->ip_blkno); 1140 if (inode2_is_ancestor < 0) { 1141 status = inode2_is_ancestor; 1142 goto bail; 1143 } 1144 1145 if ((inode1_is_ancestor == 1) || 1146 (oi1->ip_blkno < oi2->ip_blkno && 1147 inode2_is_ancestor == 0)) { 1148 /* switch id1 and id2 around */ 1149 swap(bh2, bh1); 1150 swap(inode2, inode1); 1151 } 1152 /* lock id2 */ 1153 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1154 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1155 if (status < 0) { 1156 if (status != -ENOENT) 1157 mlog_errno(status); 1158 goto bail; 1159 } 1160 } 1161 1162 /* lock id1 */ 1163 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1164 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1165 if (status < 0) { 1166 /* 1167 * An error return must mean that no cluster locks 1168 * were held on function exit. 1169 */ 1170 if (oi1->ip_blkno != oi2->ip_blkno) { 1171 ocfs2_inode_unlock(inode2, 1); 1172 brelse(*bh2); 1173 *bh2 = NULL; 1174 } 1175 1176 if (status != -ENOENT) 1177 mlog_errno(status); 1178 } 1179 1180 trace_ocfs2_double_lock_end( 1181 (unsigned long long)oi1->ip_blkno, 1182 (unsigned long long)oi2->ip_blkno); 1183 1184bail: 1185 if (status) 1186 mlog_errno(status); 1187 return status; 1188} 1189 1190static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1191{ 1192 ocfs2_inode_unlock(inode1, 1); 1193 1194 if (inode1 != inode2) 1195 ocfs2_inode_unlock(inode2, 1); 1196} 1197 1198static int ocfs2_rename(struct mnt_idmap *idmap, 1199 struct inode *old_dir, 1200 struct dentry *old_dentry, 1201 struct inode *new_dir, 1202 struct dentry *new_dentry, 1203 unsigned int flags) 1204{ 1205 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1206 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1207 struct inode *old_inode = d_inode(old_dentry); 1208 struct inode *new_inode = d_inode(new_dentry); 1209 struct inode *orphan_dir = NULL; 1210 struct ocfs2_dinode *newfe = NULL; 1211 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1212 struct buffer_head *newfe_bh = NULL; 1213 struct buffer_head *old_inode_bh = NULL; 1214 struct ocfs2_super *osb = NULL; 1215 u64 newfe_blkno, old_de_ino; 1216 handle_t *handle = NULL; 1217 struct buffer_head *old_dir_bh = NULL; 1218 struct buffer_head *new_dir_bh = NULL; 1219 u32 old_dir_nlink = old_dir->i_nlink; 1220 struct ocfs2_dinode *old_di; 1221 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1222 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1223 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1224 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1225 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1226 bool should_add_orphan = false; 1227 1228 if (flags) 1229 return -EINVAL; 1230 1231 /* At some point it might be nice to break this function up a 1232 * bit. */ 1233 1234 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, 1235 old_dentry->d_name.len, old_dentry->d_name.name, 1236 new_dentry->d_name.len, new_dentry->d_name.name); 1237 1238 status = dquot_initialize(old_dir); 1239 if (status) { 1240 mlog_errno(status); 1241 goto bail; 1242 } 1243 status = dquot_initialize(new_dir); 1244 if (status) { 1245 mlog_errno(status); 1246 goto bail; 1247 } 1248 1249 osb = OCFS2_SB(old_dir->i_sb); 1250 1251 if (new_inode) { 1252 if (!igrab(new_inode)) 1253 BUG(); 1254 } 1255 1256 /* Assume a directory hierarchy thusly: 1257 * a/b/c 1258 * a/d 1259 * a,b,c, and d are all directories. 1260 * 1261 * from cwd of 'a' on both nodes: 1262 * node1: mv b/c d 1263 * node2: mv d b/c 1264 * 1265 * And that's why, just like the VFS, we need a file system 1266 * rename lock. */ 1267 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { 1268 status = ocfs2_rename_lock(osb); 1269 if (status < 0) { 1270 mlog_errno(status); 1271 goto bail; 1272 } 1273 rename_lock = 1; 1274 1275 /* here we cannot guarantee the inodes haven't just been 1276 * changed, so check if they are nested again */ 1277 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, 1278 old_inode->i_ino); 1279 if (status < 0) { 1280 mlog_errno(status); 1281 goto bail; 1282 } else if (status == 1) { 1283 status = -EPERM; 1284 trace_ocfs2_rename_not_permitted( 1285 (unsigned long long)old_inode->i_ino, 1286 (unsigned long long)new_dir->i_ino); 1287 goto bail; 1288 } 1289 } 1290 1291 /* if old and new are the same, this'll just do one lock. */ 1292 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1293 &new_dir_bh, new_dir, 1); 1294 if (status < 0) { 1295 mlog_errno(status); 1296 goto bail; 1297 } 1298 parents_locked = 1; 1299 1300 if (!new_dir->i_nlink) { 1301 status = -EACCES; 1302 goto bail; 1303 } 1304 1305 /* make sure both dirs have bhs 1306 * get an extra ref on old_dir_bh if old==new */ 1307 if (!new_dir_bh) { 1308 if (old_dir_bh) { 1309 new_dir_bh = old_dir_bh; 1310 get_bh(new_dir_bh); 1311 } else { 1312 mlog(ML_ERROR, "no old_dir_bh!\n"); 1313 status = -EIO; 1314 goto bail; 1315 } 1316 } 1317 1318 /* 1319 * Aside from allowing a meta data update, the locking here 1320 * also ensures that the downconvert thread on other nodes 1321 * won't have to concurrently downconvert the inode and the 1322 * dentry locks. 1323 */ 1324 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, 1325 OI_LS_PARENT); 1326 if (status < 0) { 1327 if (status != -ENOENT) 1328 mlog_errno(status); 1329 goto bail; 1330 } 1331 old_child_locked = 1; 1332 1333 status = ocfs2_remote_dentry_delete(old_dentry); 1334 if (status < 0) { 1335 mlog_errno(status); 1336 goto bail; 1337 } 1338 1339 if (S_ISDIR(old_inode->i_mode)) { 1340 u64 old_inode_parent; 1341 1342 update_dot_dot = 1; 1343 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, 1344 old_inode, 1345 &old_inode_dot_dot_res); 1346 if (status) { 1347 status = -EIO; 1348 goto bail; 1349 } 1350 1351 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { 1352 status = -EIO; 1353 goto bail; 1354 } 1355 1356 if (!new_inode && new_dir != old_dir && 1357 new_dir->i_nlink >= ocfs2_link_max(osb)) { 1358 status = -EMLINK; 1359 goto bail; 1360 } 1361 } 1362 1363 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 1364 old_dentry->d_name.len, 1365 &old_de_ino); 1366 if (status) { 1367 status = -ENOENT; 1368 goto bail; 1369 } 1370 1371 /* 1372 * Check for inode number is _not_ due to possible IO errors. 1373 * We might rmdir the source, keep it as pwd of some process 1374 * and merrily kill the link to whatever was created under the 1375 * same name. Goodbye sticky bit ;-< 1376 */ 1377 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { 1378 status = -ENOENT; 1379 goto bail; 1380 } 1381 1382 /* check if the target already exists (in which case we need 1383 * to delete it */ 1384 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1385 new_dentry->d_name.len, 1386 &newfe_blkno, new_dir, 1387 &target_lookup_res); 1388 /* The only error we allow here is -ENOENT because the new 1389 * file not existing is perfectly valid. */ 1390 if ((status < 0) && (status != -ENOENT)) { 1391 /* If we cannot find the file specified we should just */ 1392 /* return the error... */ 1393 mlog_errno(status); 1394 goto bail; 1395 } 1396 if (status == 0) 1397 target_exists = 1; 1398 1399 if (!target_exists && new_inode) { 1400 /* 1401 * Target was unlinked by another node while we were 1402 * waiting to get to ocfs2_rename(). There isn't 1403 * anything we can do here to help the situation, so 1404 * bubble up the appropriate error. 1405 */ 1406 status = -ENOENT; 1407 goto bail; 1408 } 1409 1410 /* In case we need to overwrite an existing file, we blow it 1411 * away first */ 1412 if (target_exists) { 1413 /* VFS didn't think there existed an inode here, but 1414 * someone else in the cluster must have raced our 1415 * rename to create one. Today we error cleanly, in 1416 * the future we should consider calling iget to build 1417 * a new struct inode for this entry. */ 1418 if (!new_inode) { 1419 status = -EACCES; 1420 1421 trace_ocfs2_rename_target_exists(new_dentry->d_name.len, 1422 new_dentry->d_name.name); 1423 goto bail; 1424 } 1425 1426 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1427 status = -EACCES; 1428 1429 trace_ocfs2_rename_disagree( 1430 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1431 (unsigned long long)newfe_blkno, 1432 OCFS2_I(new_inode)->ip_flags); 1433 goto bail; 1434 } 1435 1436 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); 1437 if (status < 0) { 1438 if (status != -ENOENT) 1439 mlog_errno(status); 1440 goto bail; 1441 } 1442 new_child_locked = 1; 1443 1444 status = ocfs2_remote_dentry_delete(new_dentry); 1445 if (status < 0) { 1446 mlog_errno(status); 1447 goto bail; 1448 } 1449 1450 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1451 1452 trace_ocfs2_rename_over_existing( 1453 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1454 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1455 1456 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1457 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1458 OCFS2_I(new_inode)->ip_blkno, 1459 orphan_name, &orphan_insert, 1460 false); 1461 if (status < 0) { 1462 mlog_errno(status); 1463 goto bail; 1464 } 1465 should_add_orphan = true; 1466 } 1467 } else { 1468 BUG_ON(d_inode(new_dentry->d_parent) != new_dir); 1469 1470 status = ocfs2_check_dir_for_entry(new_dir, 1471 new_dentry->d_name.name, 1472 new_dentry->d_name.len); 1473 if (status) 1474 goto bail; 1475 1476 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1477 new_dentry->d_name.name, 1478 new_dentry->d_name.len, 1479 &target_insert); 1480 if (status < 0) { 1481 mlog_errno(status); 1482 goto bail; 1483 } 1484 } 1485 1486 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 1487 if (IS_ERR(handle)) { 1488 status = PTR_ERR(handle); 1489 handle = NULL; 1490 mlog_errno(status); 1491 goto bail; 1492 } 1493 1494 if (target_exists) { 1495 if (S_ISDIR(new_inode->i_mode)) { 1496 if (new_inode->i_nlink != 2 || 1497 !ocfs2_empty_dir(new_inode)) { 1498 status = -ENOTEMPTY; 1499 goto bail; 1500 } 1501 } 1502 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), 1503 newfe_bh, 1504 OCFS2_JOURNAL_ACCESS_WRITE); 1505 if (status < 0) { 1506 mlog_errno(status); 1507 goto bail; 1508 } 1509 1510 /* change the dirent to point to the correct inode */ 1511 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, 1512 old_inode); 1513 if (status < 0) { 1514 mlog_errno(status); 1515 goto bail; 1516 } 1517 inode_inc_iversion(new_dir); 1518 1519 if (S_ISDIR(new_inode->i_mode)) 1520 ocfs2_set_links_count(newfe, 0); 1521 else 1522 ocfs2_add_links_count(newfe, -1); 1523 ocfs2_journal_dirty(handle, newfe_bh); 1524 if (should_add_orphan) { 1525 status = ocfs2_orphan_add(osb, handle, new_inode, 1526 newfe_bh, orphan_name, 1527 &orphan_insert, orphan_dir, false); 1528 if (status < 0) { 1529 mlog_errno(status); 1530 goto bail; 1531 } 1532 } 1533 } else { 1534 /* if the name was not found in new_dir, add it now */ 1535 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1536 OCFS2_I(old_inode)->ip_blkno, 1537 new_dir_bh, &target_insert); 1538 if (status < 0) { 1539 mlog_errno(status); 1540 goto bail; 1541 } 1542 } 1543 1544 inode_set_ctime_current(old_inode); 1545 mark_inode_dirty(old_inode); 1546 1547 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1548 old_inode_bh, 1549 OCFS2_JOURNAL_ACCESS_WRITE); 1550 if (status >= 0) { 1551 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1552 1553 old_di->i_ctime = cpu_to_le64(inode_get_ctime(old_inode).tv_sec); 1554 old_di->i_ctime_nsec = cpu_to_le32(inode_get_ctime(old_inode).tv_nsec); 1555 ocfs2_journal_dirty(handle, old_inode_bh); 1556 } else 1557 mlog_errno(status); 1558 1559 /* 1560 * Now that the name has been added to new_dir, remove the old name. 1561 * 1562 * We don't keep any directory entry context around until now 1563 * because the insert might have changed the type of directory 1564 * we're dealing with. 1565 */ 1566 status = ocfs2_find_entry(old_dentry->d_name.name, 1567 old_dentry->d_name.len, old_dir, 1568 &old_entry_lookup); 1569 if (status) { 1570 if (!is_journal_aborted(osb->journal->j_journal)) { 1571 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1572 "is not deleted.", 1573 new_dentry->d_name.len, new_dentry->d_name.name, 1574 old_dentry->d_name.len, old_dentry->d_name.name); 1575 } 1576 goto bail; 1577 } 1578 1579 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1580 if (status < 0) { 1581 mlog_errno(status); 1582 if (!is_journal_aborted(osb->journal->j_journal)) { 1583 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1584 "is not deleted.", 1585 new_dentry->d_name.len, new_dentry->d_name.name, 1586 old_dentry->d_name.len, old_dentry->d_name.name); 1587 } 1588 goto bail; 1589 } 1590 1591 if (new_inode) { 1592 drop_nlink(new_inode); 1593 inode_set_ctime_current(new_inode); 1594 } 1595 old_dir->i_mtime = inode_set_ctime_current(old_dir); 1596 1597 if (update_dot_dot) { 1598 status = ocfs2_update_entry(old_inode, handle, 1599 &old_inode_dot_dot_res, new_dir); 1600 drop_nlink(old_dir); 1601 if (new_inode) { 1602 drop_nlink(new_inode); 1603 } else { 1604 inc_nlink(new_dir); 1605 mark_inode_dirty(new_dir); 1606 } 1607 } 1608 mark_inode_dirty(old_dir); 1609 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1610 if (new_inode) { 1611 mark_inode_dirty(new_inode); 1612 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1613 } 1614 1615 if (old_dir != new_dir) { 1616 /* Keep the same times on both directories.*/ 1617 new_dir->i_mtime = inode_set_ctime_to_ts(new_dir, 1618 inode_get_ctime(old_dir)); 1619 1620 /* 1621 * This will also pick up the i_nlink change from the 1622 * block above. 1623 */ 1624 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1625 } 1626 1627 if (old_dir_nlink != old_dir->i_nlink) { 1628 if (!old_dir_bh) { 1629 mlog(ML_ERROR, "need to change nlink for old dir " 1630 "%llu from %d to %d but bh is NULL!\n", 1631 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1632 (int)old_dir_nlink, old_dir->i_nlink); 1633 } else { 1634 struct ocfs2_dinode *fe; 1635 status = ocfs2_journal_access_di(handle, 1636 INODE_CACHE(old_dir), 1637 old_dir_bh, 1638 OCFS2_JOURNAL_ACCESS_WRITE); 1639 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1640 ocfs2_set_links_count(fe, old_dir->i_nlink); 1641 ocfs2_journal_dirty(handle, old_dir_bh); 1642 } 1643 } 1644 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1645 status = 0; 1646bail: 1647 if (handle) 1648 ocfs2_commit_trans(osb, handle); 1649 1650 if (orphan_dir) { 1651 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1652 ocfs2_inode_unlock(orphan_dir, 1); 1653 inode_unlock(orphan_dir); 1654 iput(orphan_dir); 1655 } 1656 1657 if (new_child_locked) 1658 ocfs2_inode_unlock(new_inode, 1); 1659 1660 if (old_child_locked) 1661 ocfs2_inode_unlock(old_inode, 1); 1662 1663 if (parents_locked) 1664 ocfs2_double_unlock(old_dir, new_dir); 1665 1666 if (rename_lock) 1667 ocfs2_rename_unlock(osb); 1668 1669 if (new_inode) 1670 sync_mapping_buffers(old_inode->i_mapping); 1671 1672 iput(new_inode); 1673 1674 ocfs2_free_dir_lookup_result(&target_lookup_res); 1675 ocfs2_free_dir_lookup_result(&old_entry_lookup); 1676 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); 1677 ocfs2_free_dir_lookup_result(&orphan_insert); 1678 ocfs2_free_dir_lookup_result(&target_insert); 1679 1680 brelse(newfe_bh); 1681 brelse(old_inode_bh); 1682 brelse(old_dir_bh); 1683 brelse(new_dir_bh); 1684 1685 if (status) 1686 mlog_errno(status); 1687 1688 return status; 1689} 1690 1691/* 1692 * we expect i_size = strlen(symname). Copy symname into the file 1693 * data, including the null terminator. 1694 */ 1695static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1696 handle_t *handle, 1697 struct inode *inode, 1698 const char *symname) 1699{ 1700 struct buffer_head **bhs = NULL; 1701 const char *c; 1702 struct super_block *sb = osb->sb; 1703 u64 p_blkno, p_blocks; 1704 int virtual, blocks, status, i, bytes_left; 1705 1706 bytes_left = i_size_read(inode) + 1; 1707 /* we can't trust i_blocks because we're actually going to 1708 * write i_size + 1 bytes. */ 1709 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1710 1711 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, 1712 i_size_read(inode), blocks); 1713 1714 /* Sanity check -- make sure we're going to fit. */ 1715 if (bytes_left > 1716 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1717 status = -EIO; 1718 mlog_errno(status); 1719 goto bail; 1720 } 1721 1722 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1723 if (!bhs) { 1724 status = -ENOMEM; 1725 mlog_errno(status); 1726 goto bail; 1727 } 1728 1729 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1730 NULL); 1731 if (status < 0) { 1732 mlog_errno(status); 1733 goto bail; 1734 } 1735 1736 /* links can never be larger than one cluster so we know this 1737 * is all going to be contiguous, but do a sanity check 1738 * anyway. */ 1739 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1740 status = -EIO; 1741 mlog_errno(status); 1742 goto bail; 1743 } 1744 1745 virtual = 0; 1746 while(bytes_left > 0) { 1747 c = &symname[virtual * sb->s_blocksize]; 1748 1749 bhs[virtual] = sb_getblk(sb, p_blkno); 1750 if (!bhs[virtual]) { 1751 status = -ENOMEM; 1752 mlog_errno(status); 1753 goto bail; 1754 } 1755 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), 1756 bhs[virtual]); 1757 1758 status = ocfs2_journal_access(handle, INODE_CACHE(inode), 1759 bhs[virtual], 1760 OCFS2_JOURNAL_ACCESS_CREATE); 1761 if (status < 0) { 1762 mlog_errno(status); 1763 goto bail; 1764 } 1765 1766 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1767 1768 memcpy(bhs[virtual]->b_data, c, 1769 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1770 bytes_left); 1771 1772 ocfs2_journal_dirty(handle, bhs[virtual]); 1773 1774 virtual++; 1775 p_blkno++; 1776 bytes_left -= sb->s_blocksize; 1777 } 1778 1779 status = 0; 1780bail: 1781 1782 if (bhs) { 1783 for(i = 0; i < blocks; i++) 1784 brelse(bhs[i]); 1785 kfree(bhs); 1786 } 1787 1788 if (status) 1789 mlog_errno(status); 1790 return status; 1791} 1792 1793static int ocfs2_symlink(struct mnt_idmap *idmap, 1794 struct inode *dir, 1795 struct dentry *dentry, 1796 const char *symname) 1797{ 1798 int status, l, credits; 1799 u64 newsize; 1800 struct ocfs2_super *osb = NULL; 1801 struct inode *inode = NULL; 1802 struct super_block *sb; 1803 struct buffer_head *new_fe_bh = NULL; 1804 struct buffer_head *parent_fe_bh = NULL; 1805 struct ocfs2_dinode *fe = NULL; 1806 struct ocfs2_dinode *dirfe; 1807 handle_t *handle = NULL; 1808 struct ocfs2_alloc_context *inode_ac = NULL; 1809 struct ocfs2_alloc_context *data_ac = NULL; 1810 struct ocfs2_alloc_context *xattr_ac = NULL; 1811 int want_clusters = 0; 1812 int xattr_credits = 0; 1813 struct ocfs2_security_xattr_info si = { 1814 .name = NULL, 1815 .enable = 1, 1816 }; 1817 int did_quota = 0, did_quota_inode = 0; 1818 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1819 sigset_t oldset; 1820 int did_block_signals = 0; 1821 struct ocfs2_dentry_lock *dl = NULL; 1822 1823 trace_ocfs2_symlink_begin(dir, dentry, symname, 1824 dentry->d_name.len, dentry->d_name.name); 1825 1826 status = dquot_initialize(dir); 1827 if (status) { 1828 mlog_errno(status); 1829 goto bail; 1830 } 1831 1832 sb = dir->i_sb; 1833 osb = OCFS2_SB(sb); 1834 1835 l = strlen(symname) + 1; 1836 1837 credits = ocfs2_calc_symlink_credits(sb); 1838 1839 /* lock the parent directory */ 1840 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1841 if (status < 0) { 1842 if (status != -ENOENT) 1843 mlog_errno(status); 1844 return status; 1845 } 1846 1847 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1848 if (!ocfs2_read_links_count(dirfe)) { 1849 /* can't make a file in a deleted directory. */ 1850 status = -ENOENT; 1851 goto bail; 1852 } 1853 1854 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1855 dentry->d_name.len); 1856 if (status) 1857 goto bail; 1858 1859 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1860 dentry->d_name.name, 1861 dentry->d_name.len, &lookup); 1862 if (status < 0) { 1863 mlog_errno(status); 1864 goto bail; 1865 } 1866 1867 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1868 if (status < 0) { 1869 if (status != -ENOSPC) 1870 mlog_errno(status); 1871 goto bail; 1872 } 1873 1874 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1875 if (IS_ERR(inode)) { 1876 status = PTR_ERR(inode); 1877 inode = NULL; 1878 mlog_errno(status); 1879 goto bail; 1880 } 1881 1882 /* get security xattr */ 1883 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1884 if (status) { 1885 if (status == -EOPNOTSUPP) 1886 si.enable = 0; 1887 else { 1888 mlog_errno(status); 1889 goto bail; 1890 } 1891 } 1892 1893 /* calculate meta data/clusters for setting security xattr */ 1894 if (si.enable) { 1895 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1896 &xattr_credits, &xattr_ac); 1897 if (status < 0) { 1898 mlog_errno(status); 1899 goto bail; 1900 } 1901 } 1902 1903 /* don't reserve bitmap space for fast symlinks. */ 1904 if (l > ocfs2_fast_symlink_chars(sb)) 1905 want_clusters += 1; 1906 1907 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1908 if (status < 0) { 1909 if (status != -ENOSPC) 1910 mlog_errno(status); 1911 goto bail; 1912 } 1913 1914 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1915 if (IS_ERR(handle)) { 1916 status = PTR_ERR(handle); 1917 handle = NULL; 1918 mlog_errno(status); 1919 goto bail; 1920 } 1921 1922 /* Starting to change things, restart is no longer possible. */ 1923 ocfs2_block_signals(&oldset); 1924 did_block_signals = 1; 1925 1926 status = dquot_alloc_inode(inode); 1927 if (status) 1928 goto bail; 1929 did_quota_inode = 1; 1930 1931 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1932 dentry->d_name.name, 1933 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1934 inode->i_mode); 1935 1936 status = ocfs2_mknod_locked(osb, dir, inode, 1937 0, &new_fe_bh, parent_fe_bh, handle, 1938 inode_ac); 1939 if (status < 0) { 1940 mlog_errno(status); 1941 goto bail; 1942 } 1943 1944 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1945 inode->i_rdev = 0; 1946 newsize = l - 1; 1947 inode->i_op = &ocfs2_symlink_inode_operations; 1948 inode_nohighmem(inode); 1949 if (l > ocfs2_fast_symlink_chars(sb)) { 1950 u32 offset = 0; 1951 1952 status = dquot_alloc_space_nodirty(inode, 1953 ocfs2_clusters_to_bytes(osb->sb, 1)); 1954 if (status) 1955 goto bail; 1956 did_quota = 1; 1957 inode->i_mapping->a_ops = &ocfs2_aops; 1958 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1959 new_fe_bh, 1960 handle, data_ac, NULL, 1961 NULL); 1962 if (status < 0) { 1963 if (status != -ENOSPC && status != -EINTR) { 1964 mlog(ML_ERROR, 1965 "Failed to extend file to %llu\n", 1966 (unsigned long long)newsize); 1967 mlog_errno(status); 1968 status = -ENOSPC; 1969 } 1970 goto bail; 1971 } 1972 i_size_write(inode, newsize); 1973 inode->i_blocks = ocfs2_inode_sector_count(inode); 1974 } else { 1975 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1976 memcpy((char *) fe->id2.i_symlink, symname, l); 1977 i_size_write(inode, newsize); 1978 inode->i_blocks = 0; 1979 } 1980 1981 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1982 if (status < 0) { 1983 mlog_errno(status); 1984 goto bail; 1985 } 1986 1987 if (!ocfs2_inode_is_fast_symlink(inode)) { 1988 status = ocfs2_create_symlink_data(osb, handle, inode, 1989 symname); 1990 if (status < 0) { 1991 mlog_errno(status); 1992 goto bail; 1993 } 1994 } 1995 1996 if (si.enable) { 1997 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1998 xattr_ac, data_ac); 1999 if (status < 0) { 2000 mlog_errno(status); 2001 goto bail; 2002 } 2003 } 2004 2005 /* 2006 * Do this before adding the entry to the directory. We add 2007 * also set d_op after success so that ->d_iput() will cleanup 2008 * the dentry lock even if ocfs2_add_entry() fails below. 2009 */ 2010 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2011 if (status) { 2012 mlog_errno(status); 2013 goto bail; 2014 } 2015 2016 dl = dentry->d_fsdata; 2017 2018 status = ocfs2_add_entry(handle, dentry, inode, 2019 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2020 &lookup); 2021 if (status < 0) { 2022 mlog_errno(status); 2023 goto bail; 2024 } 2025 2026 insert_inode_hash(inode); 2027 d_instantiate(dentry, inode); 2028bail: 2029 if (status < 0 && did_quota) 2030 dquot_free_space_nodirty(inode, 2031 ocfs2_clusters_to_bytes(osb->sb, 1)); 2032 if (status < 0 && did_quota_inode) 2033 dquot_free_inode(inode); 2034 if (handle) { 2035 if (status < 0 && fe) 2036 ocfs2_set_links_count(fe, 0); 2037 ocfs2_commit_trans(osb, handle); 2038 } 2039 2040 ocfs2_inode_unlock(dir, 1); 2041 if (did_block_signals) 2042 ocfs2_unblock_signals(&oldset); 2043 2044 brelse(new_fe_bh); 2045 brelse(parent_fe_bh); 2046 kfree(si.value); 2047 ocfs2_free_dir_lookup_result(&lookup); 2048 if (inode_ac) 2049 ocfs2_free_alloc_context(inode_ac); 2050 if (data_ac) 2051 ocfs2_free_alloc_context(data_ac); 2052 if (xattr_ac) 2053 ocfs2_free_alloc_context(xattr_ac); 2054 if ((status < 0) && inode) { 2055 if (dl) 2056 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2057 2058 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2059 clear_nlink(inode); 2060 iput(inode); 2061 } 2062 2063 if (status) 2064 mlog_errno(status); 2065 2066 return status; 2067} 2068 2069static int ocfs2_blkno_stringify(u64 blkno, char *name) 2070{ 2071 int status, namelen; 2072 2073 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2074 (long long)blkno); 2075 if (namelen <= 0) { 2076 if (namelen) 2077 status = namelen; 2078 else 2079 status = -EINVAL; 2080 mlog_errno(status); 2081 goto bail; 2082 } 2083 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2084 status = -EINVAL; 2085 mlog_errno(status); 2086 goto bail; 2087 } 2088 2089 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2090 2091 status = 0; 2092bail: 2093 if (status < 0) 2094 mlog_errno(status); 2095 return status; 2096} 2097 2098static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2099 struct inode **ret_orphan_dir, 2100 struct buffer_head **ret_orphan_dir_bh) 2101{ 2102 struct inode *orphan_dir_inode; 2103 struct buffer_head *orphan_dir_bh = NULL; 2104 int ret = 0; 2105 2106 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2107 ORPHAN_DIR_SYSTEM_INODE, 2108 osb->slot_num); 2109 if (!orphan_dir_inode) { 2110 ret = -ENOENT; 2111 mlog_errno(ret); 2112 return ret; 2113 } 2114 2115 inode_lock(orphan_dir_inode); 2116 2117 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2118 if (ret < 0) { 2119 inode_unlock(orphan_dir_inode); 2120 iput(orphan_dir_inode); 2121 2122 mlog_errno(ret); 2123 return ret; 2124 } 2125 2126 *ret_orphan_dir = orphan_dir_inode; 2127 *ret_orphan_dir_bh = orphan_dir_bh; 2128 2129 return 0; 2130} 2131 2132static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2133 struct buffer_head *orphan_dir_bh, 2134 u64 blkno, 2135 char *name, 2136 struct ocfs2_dir_lookup_result *lookup, 2137 bool dio) 2138{ 2139 int ret; 2140 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2141 int namelen = dio ? 2142 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2143 OCFS2_ORPHAN_NAMELEN; 2144 2145 if (dio) { 2146 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2147 OCFS2_DIO_ORPHAN_PREFIX); 2148 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2149 ret = -EINVAL; 2150 mlog_errno(ret); 2151 return ret; 2152 } 2153 2154 ret = ocfs2_blkno_stringify(blkno, 2155 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2156 } else 2157 ret = ocfs2_blkno_stringify(blkno, name); 2158 if (ret < 0) { 2159 mlog_errno(ret); 2160 return ret; 2161 } 2162 2163 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2164 orphan_dir_bh, name, 2165 namelen, lookup); 2166 if (ret < 0) { 2167 mlog_errno(ret); 2168 return ret; 2169 } 2170 2171 return 0; 2172} 2173 2174/** 2175 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2176 * insertion of an orphan. 2177 * @osb: ocfs2 file system 2178 * @ret_orphan_dir: Orphan dir inode - returned locked! 2179 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2180 * @lookup: dir lookup result, to be passed back into functions like 2181 * ocfs2_orphan_add 2182 * 2183 * Returns zero on success and the ret_orphan_dir, name and lookup 2184 * fields will be populated. 2185 * 2186 * Returns non-zero on failure. 2187 */ 2188static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2189 struct inode **ret_orphan_dir, 2190 u64 blkno, 2191 char *name, 2192 struct ocfs2_dir_lookup_result *lookup, 2193 bool dio) 2194{ 2195 struct inode *orphan_dir_inode = NULL; 2196 struct buffer_head *orphan_dir_bh = NULL; 2197 int ret = 0; 2198 2199 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2200 &orphan_dir_bh); 2201 if (ret < 0) { 2202 mlog_errno(ret); 2203 return ret; 2204 } 2205 2206 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2207 blkno, name, lookup, dio); 2208 if (ret < 0) { 2209 mlog_errno(ret); 2210 goto out; 2211 } 2212 2213 *ret_orphan_dir = orphan_dir_inode; 2214 2215out: 2216 brelse(orphan_dir_bh); 2217 2218 if (ret) { 2219 ocfs2_inode_unlock(orphan_dir_inode, 1); 2220 inode_unlock(orphan_dir_inode); 2221 iput(orphan_dir_inode); 2222 } 2223 2224 if (ret) 2225 mlog_errno(ret); 2226 return ret; 2227} 2228 2229static int ocfs2_orphan_add(struct ocfs2_super *osb, 2230 handle_t *handle, 2231 struct inode *inode, 2232 struct buffer_head *fe_bh, 2233 char *name, 2234 struct ocfs2_dir_lookup_result *lookup, 2235 struct inode *orphan_dir_inode, 2236 bool dio) 2237{ 2238 struct buffer_head *orphan_dir_bh = NULL; 2239 int status = 0; 2240 struct ocfs2_dinode *orphan_fe; 2241 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2242 int namelen = dio ? 2243 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2244 OCFS2_ORPHAN_NAMELEN; 2245 2246 trace_ocfs2_orphan_add_begin( 2247 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2248 2249 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2250 if (status < 0) { 2251 mlog_errno(status); 2252 goto leave; 2253 } 2254 2255 status = ocfs2_journal_access_di(handle, 2256 INODE_CACHE(orphan_dir_inode), 2257 orphan_dir_bh, 2258 OCFS2_JOURNAL_ACCESS_WRITE); 2259 if (status < 0) { 2260 mlog_errno(status); 2261 goto leave; 2262 } 2263 2264 /* 2265 * We're going to journal the change of i_flags and i_orphaned_slot. 2266 * It's safe anyway, though some callers may duplicate the journaling. 2267 * Journaling within the func just make the logic look more 2268 * straightforward. 2269 */ 2270 status = ocfs2_journal_access_di(handle, 2271 INODE_CACHE(inode), 2272 fe_bh, 2273 OCFS2_JOURNAL_ACCESS_WRITE); 2274 if (status < 0) { 2275 mlog_errno(status); 2276 goto leave; 2277 } 2278 2279 /* we're a cluster, and nlink can change on disk from 2280 * underneath us... */ 2281 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2282 if (S_ISDIR(inode->i_mode)) 2283 ocfs2_add_links_count(orphan_fe, 1); 2284 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2285 ocfs2_journal_dirty(handle, orphan_dir_bh); 2286 2287 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2288 namelen, inode, 2289 OCFS2_I(inode)->ip_blkno, 2290 orphan_dir_bh, lookup); 2291 if (status < 0) { 2292 mlog_errno(status); 2293 goto rollback; 2294 } 2295 2296 if (dio) { 2297 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2298 * slot. 2299 */ 2300 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2301 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2302 } else { 2303 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2304 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2305 2306 /* Record which orphan dir our inode now resides 2307 * in. delete_inode will use this to determine which orphan 2308 * dir to lock. */ 2309 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2310 } 2311 2312 ocfs2_journal_dirty(handle, fe_bh); 2313 2314 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2315 osb->slot_num); 2316 2317rollback: 2318 if (status < 0) { 2319 if (S_ISDIR(inode->i_mode)) 2320 ocfs2_add_links_count(orphan_fe, -1); 2321 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2322 } 2323 2324leave: 2325 brelse(orphan_dir_bh); 2326 2327 return status; 2328} 2329 2330/* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2331int ocfs2_orphan_del(struct ocfs2_super *osb, 2332 handle_t *handle, 2333 struct inode *orphan_dir_inode, 2334 struct inode *inode, 2335 struct buffer_head *orphan_dir_bh, 2336 bool dio) 2337{ 2338 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2339 struct ocfs2_dinode *orphan_fe; 2340 int status = 0; 2341 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2342 2343 if (dio) { 2344 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2345 OCFS2_DIO_ORPHAN_PREFIX); 2346 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2347 status = -EINVAL; 2348 mlog_errno(status); 2349 return status; 2350 } 2351 2352 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2353 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2354 } else 2355 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2356 if (status < 0) { 2357 mlog_errno(status); 2358 goto leave; 2359 } 2360 2361 trace_ocfs2_orphan_del( 2362 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2363 name, strlen(name)); 2364 2365 status = ocfs2_journal_access_di(handle, 2366 INODE_CACHE(orphan_dir_inode), 2367 orphan_dir_bh, 2368 OCFS2_JOURNAL_ACCESS_WRITE); 2369 if (status < 0) { 2370 mlog_errno(status); 2371 goto leave; 2372 } 2373 2374 /* find it's spot in the orphan directory */ 2375 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2376 &lookup); 2377 if (status) { 2378 mlog_errno(status); 2379 goto leave; 2380 } 2381 2382 /* remove it from the orphan directory */ 2383 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2384 if (status < 0) { 2385 mlog_errno(status); 2386 goto leave; 2387 } 2388 2389 /* do the i_nlink dance! :) */ 2390 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2391 if (S_ISDIR(inode->i_mode)) 2392 ocfs2_add_links_count(orphan_fe, -1); 2393 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2394 ocfs2_journal_dirty(handle, orphan_dir_bh); 2395 2396leave: 2397 ocfs2_free_dir_lookup_result(&lookup); 2398 2399 if (status) 2400 mlog_errno(status); 2401 return status; 2402} 2403 2404/** 2405 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2406 * allocated file. This is different from the typical 'add to orphan dir' 2407 * operation in that the inode does not yet exist. This is a problem because 2408 * the orphan dir stringifies the inode block number to come up with it's 2409 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2410 * problem. This function works around it by calling deeper into the orphan 2411 * and suballoc code than other callers. Use this only by necessity. 2412 * @dir: The directory which this inode will ultimately wind up under - not the 2413 * orphan dir! 2414 * @dir_bh: buffer_head the @dir inode block 2415 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2416 * with the string to be used for orphan dirent. Pass back to the orphan dir 2417 * code. 2418 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2419 * dir code. 2420 * @ret_di_blkno: block number where the new inode will be allocated. 2421 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2422 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2423 * 2424 * Returns zero on success and the ret_orphan_dir, name and lookup 2425 * fields will be populated. 2426 * 2427 * Returns non-zero on failure. 2428 */ 2429static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2430 struct buffer_head *dir_bh, 2431 char *orphan_name, 2432 struct inode **ret_orphan_dir, 2433 u64 *ret_di_blkno, 2434 struct ocfs2_dir_lookup_result *orphan_insert, 2435 struct ocfs2_alloc_context **ret_inode_ac) 2436{ 2437 int ret; 2438 u64 di_blkno; 2439 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2440 struct inode *orphan_dir = NULL; 2441 struct buffer_head *orphan_dir_bh = NULL; 2442 struct ocfs2_alloc_context *inode_ac = NULL; 2443 2444 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2445 if (ret < 0) { 2446 mlog_errno(ret); 2447 return ret; 2448 } 2449 2450 /* reserve an inode spot */ 2451 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2452 if (ret < 0) { 2453 if (ret != -ENOSPC) 2454 mlog_errno(ret); 2455 goto out; 2456 } 2457 2458 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2459 &di_blkno); 2460 if (ret) { 2461 mlog_errno(ret); 2462 goto out; 2463 } 2464 2465 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2466 di_blkno, orphan_name, orphan_insert, 2467 false); 2468 if (ret < 0) { 2469 mlog_errno(ret); 2470 goto out; 2471 } 2472 2473out: 2474 if (ret == 0) { 2475 *ret_orphan_dir = orphan_dir; 2476 *ret_di_blkno = di_blkno; 2477 *ret_inode_ac = inode_ac; 2478 /* 2479 * orphan_name and orphan_insert are already up to 2480 * date via prepare_orphan_dir 2481 */ 2482 } else { 2483 /* Unroll reserve_new_inode* */ 2484 if (inode_ac) 2485 ocfs2_free_alloc_context(inode_ac); 2486 2487 /* Unroll orphan dir locking */ 2488 inode_unlock(orphan_dir); 2489 ocfs2_inode_unlock(orphan_dir, 1); 2490 iput(orphan_dir); 2491 } 2492 2493 brelse(orphan_dir_bh); 2494 2495 return ret; 2496} 2497 2498int ocfs2_create_inode_in_orphan(struct inode *dir, 2499 int mode, 2500 struct inode **new_inode) 2501{ 2502 int status, did_quota_inode = 0; 2503 struct inode *inode = NULL; 2504 struct inode *orphan_dir = NULL; 2505 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2506 handle_t *handle = NULL; 2507 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2508 struct buffer_head *parent_di_bh = NULL; 2509 struct buffer_head *new_di_bh = NULL; 2510 struct ocfs2_alloc_context *inode_ac = NULL; 2511 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2512 u64 di_blkno, suballoc_loc; 2513 u16 suballoc_bit; 2514 2515 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2516 if (status < 0) { 2517 if (status != -ENOENT) 2518 mlog_errno(status); 2519 return status; 2520 } 2521 2522 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2523 orphan_name, &orphan_dir, 2524 &di_blkno, &orphan_insert, &inode_ac); 2525 if (status < 0) { 2526 if (status != -ENOSPC) 2527 mlog_errno(status); 2528 goto leave; 2529 } 2530 2531 inode = ocfs2_get_init_inode(dir, mode); 2532 if (IS_ERR(inode)) { 2533 status = PTR_ERR(inode); 2534 inode = NULL; 2535 mlog_errno(status); 2536 goto leave; 2537 } 2538 2539 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2540 if (IS_ERR(handle)) { 2541 status = PTR_ERR(handle); 2542 handle = NULL; 2543 mlog_errno(status); 2544 goto leave; 2545 } 2546 2547 status = dquot_alloc_inode(inode); 2548 if (status) 2549 goto leave; 2550 did_quota_inode = 1; 2551 2552 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2553 &suballoc_loc, 2554 &suballoc_bit, di_blkno); 2555 if (status < 0) { 2556 mlog_errno(status); 2557 goto leave; 2558 } 2559 2560 clear_nlink(inode); 2561 /* do the real work now. */ 2562 status = __ocfs2_mknod_locked(dir, inode, 2563 0, &new_di_bh, parent_di_bh, handle, 2564 inode_ac, di_blkno, suballoc_loc, 2565 suballoc_bit); 2566 if (status < 0) { 2567 mlog_errno(status); 2568 goto leave; 2569 } 2570 2571 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2572 &orphan_insert, orphan_dir, false); 2573 if (status < 0) { 2574 mlog_errno(status); 2575 goto leave; 2576 } 2577 2578 /* get open lock so that only nodes can't remove it from orphan dir. */ 2579 status = ocfs2_open_lock(inode); 2580 if (status < 0) 2581 mlog_errno(status); 2582 2583 insert_inode_hash(inode); 2584leave: 2585 if (status < 0 && did_quota_inode) 2586 dquot_free_inode(inode); 2587 if (handle) 2588 ocfs2_commit_trans(osb, handle); 2589 2590 if (orphan_dir) { 2591 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2592 ocfs2_inode_unlock(orphan_dir, 1); 2593 inode_unlock(orphan_dir); 2594 iput(orphan_dir); 2595 } 2596 2597 if ((status < 0) && inode) { 2598 clear_nlink(inode); 2599 iput(inode); 2600 } 2601 2602 if (inode_ac) 2603 ocfs2_free_alloc_context(inode_ac); 2604 2605 brelse(new_di_bh); 2606 2607 if (!status) 2608 *new_inode = inode; 2609 2610 ocfs2_free_dir_lookup_result(&orphan_insert); 2611 2612 ocfs2_inode_unlock(dir, 1); 2613 brelse(parent_di_bh); 2614 return status; 2615} 2616 2617int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2618 struct inode *inode) 2619{ 2620 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2621 struct inode *orphan_dir_inode = NULL; 2622 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2623 struct buffer_head *di_bh = NULL; 2624 int status = 0; 2625 handle_t *handle = NULL; 2626 struct ocfs2_dinode *di = NULL; 2627 2628 status = ocfs2_inode_lock(inode, &di_bh, 1); 2629 if (status < 0) { 2630 mlog_errno(status); 2631 goto bail; 2632 } 2633 2634 di = (struct ocfs2_dinode *) di_bh->b_data; 2635 /* 2636 * Another append dio crashed? 2637 * If so, manually recover it first. 2638 */ 2639 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2640 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2641 if (status < 0) { 2642 if (status != -ENOSPC) 2643 mlog_errno(status); 2644 goto bail_unlock_inode; 2645 } 2646 2647 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2648 if (status < 0) { 2649 mlog_errno(status); 2650 goto bail_unlock_inode; 2651 } 2652 } 2653 2654 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2655 OCFS2_I(inode)->ip_blkno, 2656 orphan_name, 2657 &orphan_insert, 2658 true); 2659 if (status < 0) { 2660 mlog_errno(status); 2661 goto bail_unlock_inode; 2662 } 2663 2664 handle = ocfs2_start_trans(osb, 2665 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2666 if (IS_ERR(handle)) { 2667 status = PTR_ERR(handle); 2668 goto bail_unlock_orphan; 2669 } 2670 2671 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2672 &orphan_insert, orphan_dir_inode, true); 2673 if (status) 2674 mlog_errno(status); 2675 2676 ocfs2_commit_trans(osb, handle); 2677 2678bail_unlock_orphan: 2679 ocfs2_inode_unlock(orphan_dir_inode, 1); 2680 inode_unlock(orphan_dir_inode); 2681 iput(orphan_dir_inode); 2682 2683 ocfs2_free_dir_lookup_result(&orphan_insert); 2684 2685bail_unlock_inode: 2686 ocfs2_inode_unlock(inode, 1); 2687 brelse(di_bh); 2688 2689bail: 2690 return status; 2691} 2692 2693int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2694 struct inode *inode, struct buffer_head *di_bh, 2695 int update_isize, loff_t end) 2696{ 2697 struct inode *orphan_dir_inode = NULL; 2698 struct buffer_head *orphan_dir_bh = NULL; 2699 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2700 handle_t *handle = NULL; 2701 int status = 0; 2702 2703 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2704 ORPHAN_DIR_SYSTEM_INODE, 2705 le16_to_cpu(di->i_dio_orphaned_slot)); 2706 if (!orphan_dir_inode) { 2707 status = -ENOENT; 2708 mlog_errno(status); 2709 goto bail; 2710 } 2711 2712 inode_lock(orphan_dir_inode); 2713 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2714 if (status < 0) { 2715 inode_unlock(orphan_dir_inode); 2716 iput(orphan_dir_inode); 2717 mlog_errno(status); 2718 goto bail; 2719 } 2720 2721 handle = ocfs2_start_trans(osb, 2722 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2723 if (IS_ERR(handle)) { 2724 status = PTR_ERR(handle); 2725 goto bail_unlock_orphan; 2726 } 2727 2728 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2729 2730 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2731 inode, orphan_dir_bh, true); 2732 if (status < 0) { 2733 mlog_errno(status); 2734 goto bail_commit; 2735 } 2736 2737 status = ocfs2_journal_access_di(handle, 2738 INODE_CACHE(inode), 2739 di_bh, 2740 OCFS2_JOURNAL_ACCESS_WRITE); 2741 if (status < 0) { 2742 mlog_errno(status); 2743 goto bail_commit; 2744 } 2745 2746 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2747 di->i_dio_orphaned_slot = 0; 2748 2749 if (update_isize) { 2750 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2751 if (status) 2752 mlog_errno(status); 2753 } else 2754 ocfs2_journal_dirty(handle, di_bh); 2755 2756bail_commit: 2757 ocfs2_commit_trans(osb, handle); 2758 2759bail_unlock_orphan: 2760 ocfs2_inode_unlock(orphan_dir_inode, 1); 2761 inode_unlock(orphan_dir_inode); 2762 brelse(orphan_dir_bh); 2763 iput(orphan_dir_inode); 2764 2765bail: 2766 return status; 2767} 2768 2769int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2770 struct inode *inode, 2771 struct dentry *dentry) 2772{ 2773 int status = 0; 2774 struct buffer_head *parent_di_bh = NULL; 2775 handle_t *handle = NULL; 2776 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2777 struct ocfs2_dinode *dir_di, *di; 2778 struct inode *orphan_dir_inode = NULL; 2779 struct buffer_head *orphan_dir_bh = NULL; 2780 struct buffer_head *di_bh = NULL; 2781 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2782 2783 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2784 dentry->d_name.len, dentry->d_name.name, 2785 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2786 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2787 2788 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2789 if (status < 0) { 2790 if (status != -ENOENT) 2791 mlog_errno(status); 2792 return status; 2793 } 2794 2795 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2796 if (!dir_di->i_links_count) { 2797 /* can't make a file in a deleted directory. */ 2798 status = -ENOENT; 2799 goto leave; 2800 } 2801 2802 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2803 dentry->d_name.len); 2804 if (status) 2805 goto leave; 2806 2807 /* get a spot inside the dir. */ 2808 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2809 dentry->d_name.name, 2810 dentry->d_name.len, &lookup); 2811 if (status < 0) { 2812 mlog_errno(status); 2813 goto leave; 2814 } 2815 2816 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2817 ORPHAN_DIR_SYSTEM_INODE, 2818 osb->slot_num); 2819 if (!orphan_dir_inode) { 2820 status = -ENOENT; 2821 mlog_errno(status); 2822 goto leave; 2823 } 2824 2825 inode_lock(orphan_dir_inode); 2826 2827 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2828 if (status < 0) { 2829 mlog_errno(status); 2830 inode_unlock(orphan_dir_inode); 2831 iput(orphan_dir_inode); 2832 goto leave; 2833 } 2834 2835 status = ocfs2_read_inode_block(inode, &di_bh); 2836 if (status < 0) { 2837 mlog_errno(status); 2838 goto orphan_unlock; 2839 } 2840 2841 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2842 if (IS_ERR(handle)) { 2843 status = PTR_ERR(handle); 2844 handle = NULL; 2845 mlog_errno(status); 2846 goto orphan_unlock; 2847 } 2848 2849 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2850 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2851 if (status < 0) { 2852 mlog_errno(status); 2853 goto out_commit; 2854 } 2855 2856 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2857 orphan_dir_bh, false); 2858 if (status < 0) { 2859 mlog_errno(status); 2860 goto out_commit; 2861 } 2862 2863 di = (struct ocfs2_dinode *)di_bh->b_data; 2864 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2865 di->i_orphaned_slot = 0; 2866 set_nlink(inode, 1); 2867 ocfs2_set_links_count(di, inode->i_nlink); 2868 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2869 ocfs2_journal_dirty(handle, di_bh); 2870 2871 status = ocfs2_add_entry(handle, dentry, inode, 2872 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2873 &lookup); 2874 if (status < 0) { 2875 mlog_errno(status); 2876 goto out_commit; 2877 } 2878 2879 status = ocfs2_dentry_attach_lock(dentry, inode, 2880 OCFS2_I(dir)->ip_blkno); 2881 if (status) { 2882 mlog_errno(status); 2883 goto out_commit; 2884 } 2885 2886 d_instantiate(dentry, inode); 2887 status = 0; 2888out_commit: 2889 ocfs2_commit_trans(osb, handle); 2890orphan_unlock: 2891 ocfs2_inode_unlock(orphan_dir_inode, 1); 2892 inode_unlock(orphan_dir_inode); 2893 iput(orphan_dir_inode); 2894leave: 2895 2896 ocfs2_inode_unlock(dir, 1); 2897 2898 brelse(di_bh); 2899 brelse(parent_di_bh); 2900 brelse(orphan_dir_bh); 2901 2902 ocfs2_free_dir_lookup_result(&lookup); 2903 2904 if (status) 2905 mlog_errno(status); 2906 2907 return status; 2908} 2909 2910const struct inode_operations ocfs2_dir_iops = { 2911 .create = ocfs2_create, 2912 .lookup = ocfs2_lookup, 2913 .link = ocfs2_link, 2914 .unlink = ocfs2_unlink, 2915 .rmdir = ocfs2_unlink, 2916 .symlink = ocfs2_symlink, 2917 .mkdir = ocfs2_mkdir, 2918 .mknod = ocfs2_mknod, 2919 .rename = ocfs2_rename, 2920 .setattr = ocfs2_setattr, 2921 .getattr = ocfs2_getattr, 2922 .permission = ocfs2_permission, 2923 .listxattr = ocfs2_listxattr, 2924 .fiemap = ocfs2_fiemap, 2925 .get_inode_acl = ocfs2_iop_get_acl, 2926 .set_acl = ocfs2_iop_set_acl, 2927 .fileattr_get = ocfs2_fileattr_get, 2928 .fileattr_set = ocfs2_fileattr_set, 2929}; 2930