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