1/* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * namei.c 5 * 6 * Create and rename file, directory, symlinks 7 * 8 * Copyright (C) 2002, 2004 Oracle. All rights reserved. 9 * 10 * Portions of this code from linux/fs/ext3/dir.c 11 * 12 * Copyright (C) 1992, 1993, 1994, 1995 13 * Remy Card (card@masi.ibp.fr) 14 * Laboratoire MASI - Institut Blaise pascal 15 * Universite Pierre et Marie Curie (Paris VI) 16 * 17 * from 18 * 19 * linux/fs/minix/dir.c 20 * 21 * Copyright (C) 1991, 1992 Linux Torvalds 22 * 23 * This program is free software; you can redistribute it and/or 24 * modify it under the terms of the GNU General Public 25 * License as published by the Free Software Foundation; either 26 * version 2 of the License, or (at your option) any later version. 27 * 28 * This program is distributed in the hope that it will be useful, 29 * but WITHOUT ANY WARRANTY; without even the implied warranty of 30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 31 * General Public License for more details. 32 * 33 * You should have received a copy of the GNU General Public 34 * License along with this program; if not, write to the 35 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 36 * Boston, MA 021110-1307, USA. 37 */ 38 39#include <linux/fs.h> 40#include <linux/types.h> 41#include <linux/slab.h> 42#include <linux/highmem.h> 43#include <linux/quotaops.h> 44 45#include <cluster/masklog.h> 46 47#include "ocfs2.h" 48 49#include "alloc.h" 50#include "dcache.h" 51#include "dir.h" 52#include "dlmglue.h" 53#include "extent_map.h" 54#include "file.h" 55#include "inode.h" 56#include "journal.h" 57#include "namei.h" 58#include "suballoc.h" 59#include "super.h" 60#include "symlink.h" 61#include "sysfile.h" 62#include "uptodate.h" 63#include "xattr.h" 64#include "acl.h" 65#include "ocfs2_trace.h" 66 67#include "buffer_head_io.h" 68 69static int ocfs2_mknod_locked(struct ocfs2_super *osb, 70 struct inode *dir, 71 struct inode *inode, 72 dev_t dev, 73 struct buffer_head **new_fe_bh, 74 struct buffer_head *parent_fe_bh, 75 handle_t *handle, 76 struct ocfs2_alloc_context *inode_ac); 77 78static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 79 struct inode **ret_orphan_dir, 80 u64 blkno, 81 char *name, 82 struct ocfs2_dir_lookup_result *lookup, 83 bool dio); 84 85static int ocfs2_orphan_add(struct ocfs2_super *osb, 86 handle_t *handle, 87 struct inode *inode, 88 struct buffer_head *fe_bh, 89 char *name, 90 struct ocfs2_dir_lookup_result *lookup, 91 struct inode *orphan_dir_inode, 92 bool dio); 93 94static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 95 handle_t *handle, 96 struct inode *inode, 97 const char *symname); 98 99static int ocfs2_double_lock(struct ocfs2_super *osb, 100 struct buffer_head **bh1, 101 struct inode *inode1, 102 struct buffer_head **bh2, 103 struct inode *inode2, 104 int rename); 105 106static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2); 107/* An orphan dir name is an 8 byte value, printed as a hex string */ 108#define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) 109 110static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 111 unsigned int flags) 112{ 113 int status; 114 u64 blkno; 115 struct inode *inode = NULL; 116 struct dentry *ret; 117 struct ocfs2_inode_info *oi; 118 119 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len, 120 dentry->d_name.name, 121 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0); 122 123 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 124 ret = ERR_PTR(-ENAMETOOLONG); 125 goto bail; 126 } 127 128 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT); 129 if (status < 0) { 130 if (status != -ENOENT) 131 mlog_errno(status); 132 ret = ERR_PTR(status); 133 goto bail; 134 } 135 136 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, 137 dentry->d_name.len, &blkno); 138 if (status < 0) 139 goto bail_add; 140 141 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); 142 if (IS_ERR(inode)) { 143 ret = ERR_PTR(-EACCES); 144 goto bail_unlock; 145 } 146 147 oi = OCFS2_I(inode); 148 /* Clear any orphaned state... If we were able to look up the 149 * inode from a directory, it certainly can't be orphaned. We 150 * might have the bad state from a node which intended to 151 * orphan this inode but crashed before it could commit the 152 * unlink. */ 153 spin_lock(&oi->ip_lock); 154 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 155 spin_unlock(&oi->ip_lock); 156 157bail_add: 158 ret = d_splice_alias(inode, dentry); 159 160 if (inode) { 161 /* 162 * If d_splice_alias() finds a DCACHE_DISCONNECTED 163 * dentry, it will d_move() it on top of ourse. The 164 * return value will indicate this however, so in 165 * those cases, we switch them around for the locking 166 * code. 167 * 168 * NOTE: This dentry already has ->d_op set from 169 * ocfs2_get_parent() and ocfs2_get_dentry() 170 */ 171 if (!IS_ERR_OR_NULL(ret)) 172 dentry = ret; 173 174 status = ocfs2_dentry_attach_lock(dentry, inode, 175 OCFS2_I(dir)->ip_blkno); 176 if (status) { 177 mlog_errno(status); 178 ret = ERR_PTR(status); 179 goto bail_unlock; 180 } 181 } else 182 ocfs2_dentry_attach_gen(dentry); 183 184bail_unlock: 185 /* Don't drop the cluster lock until *after* the d_add -- 186 * unlink on another node will message us to remove that 187 * dentry under this lock so otherwise we can race this with 188 * the downconvert thread and have a stale dentry. */ 189 ocfs2_inode_unlock(dir, 0); 190 191bail: 192 193 trace_ocfs2_lookup_ret(ret); 194 195 return ret; 196} 197 198static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode) 199{ 200 struct inode *inode; 201 int status; 202 203 inode = new_inode(dir->i_sb); 204 if (!inode) { 205 mlog(ML_ERROR, "new_inode failed!\n"); 206 return ERR_PTR(-ENOMEM); 207 } 208 209 /* populate as many fields early on as possible - many of 210 * these are used by the support functions here and in 211 * callers. */ 212 if (S_ISDIR(mode)) 213 set_nlink(inode, 2); 214 inode_init_owner(inode, dir, mode); 215 status = dquot_initialize(inode); 216 if (status) 217 return ERR_PTR(status); 218 219 return inode; 220} 221 222static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, 223 struct dentry *dentry, struct inode *inode) 224{ 225 struct ocfs2_dentry_lock *dl = dentry->d_fsdata; 226 227 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres); 228 ocfs2_lock_res_free(&dl->dl_lockres); 229 BUG_ON(dl->dl_count != 1); 230 spin_lock(&dentry_attach_lock); 231 dentry->d_fsdata = NULL; 232 spin_unlock(&dentry_attach_lock); 233 kfree(dl); 234 iput(inode); 235} 236 237static int ocfs2_mknod(struct inode *dir, 238 struct dentry *dentry, 239 umode_t mode, 240 dev_t dev) 241{ 242 int status = 0; 243 struct buffer_head *parent_fe_bh = NULL; 244 handle_t *handle = NULL; 245 struct ocfs2_super *osb; 246 struct ocfs2_dinode *dirfe; 247 struct buffer_head *new_fe_bh = NULL; 248 struct inode *inode = NULL; 249 struct ocfs2_alloc_context *inode_ac = NULL; 250 struct ocfs2_alloc_context *data_ac = NULL; 251 struct ocfs2_alloc_context *meta_ac = NULL; 252 int want_clusters = 0; 253 int want_meta = 0; 254 int xattr_credits = 0; 255 struct ocfs2_security_xattr_info si = { 256 .enable = 1, 257 }; 258 int did_quota_inode = 0; 259 struct ocfs2_dir_lookup_result lookup = { NULL, }; 260 sigset_t oldset; 261 int did_block_signals = 0; 262 struct ocfs2_dentry_lock *dl = NULL; 263 264 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, 265 (unsigned long long)OCFS2_I(dir)->ip_blkno, 266 (unsigned long)dev, mode); 267 268 status = dquot_initialize(dir); 269 if (status) { 270 mlog_errno(status); 271 return status; 272 } 273 274 /* get our super block */ 275 osb = OCFS2_SB(dir->i_sb); 276 277 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 278 if (status < 0) { 279 if (status != -ENOENT) 280 mlog_errno(status); 281 return status; 282 } 283 284 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { 285 status = -EMLINK; 286 goto leave; 287 } 288 289 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 290 if (!ocfs2_read_links_count(dirfe)) { 291 /* can't make a file in a deleted directory. */ 292 status = -ENOENT; 293 goto leave; 294 } 295 296 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 297 dentry->d_name.len); 298 if (status) 299 goto leave; 300 301 /* get a spot inside the dir. */ 302 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 303 dentry->d_name.name, 304 dentry->d_name.len, &lookup); 305 if (status < 0) { 306 mlog_errno(status); 307 goto leave; 308 } 309 310 /* reserve an inode spot */ 311 status = ocfs2_reserve_new_inode(osb, &inode_ac); 312 if (status < 0) { 313 if (status != -ENOSPC) 314 mlog_errno(status); 315 goto leave; 316 } 317 318 inode = ocfs2_get_init_inode(dir, mode); 319 if (IS_ERR(inode)) { 320 status = PTR_ERR(inode); 321 inode = NULL; 322 mlog_errno(status); 323 goto leave; 324 } 325 326 /* get security xattr */ 327 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 328 if (status) { 329 if (status == -EOPNOTSUPP) 330 si.enable = 0; 331 else { 332 mlog_errno(status); 333 goto leave; 334 } 335 } 336 337 /* calculate meta data/clusters for setting security and acl xattr */ 338 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, 339 &si, &want_clusters, 340 &xattr_credits, &want_meta); 341 if (status < 0) { 342 mlog_errno(status); 343 goto leave; 344 } 345 346 /* Reserve a cluster if creating an extent based directory. */ 347 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { 348 want_clusters += 1; 349 350 /* Dir indexing requires extra space as well */ 351 if (ocfs2_supports_indexed_dirs(osb)) 352 want_meta++; 353 } 354 355 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); 356 if (status < 0) { 357 if (status != -ENOSPC) 358 mlog_errno(status); 359 goto leave; 360 } 361 362 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 363 if (status < 0) { 364 if (status != -ENOSPC) 365 mlog_errno(status); 366 goto leave; 367 } 368 369 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 370 S_ISDIR(mode), 371 xattr_credits)); 372 if (IS_ERR(handle)) { 373 status = PTR_ERR(handle); 374 handle = NULL; 375 mlog_errno(status); 376 goto leave; 377 } 378 379 /* Starting to change things, restart is no longer possible. */ 380 ocfs2_block_signals(&oldset); 381 did_block_signals = 1; 382 383 status = dquot_alloc_inode(inode); 384 if (status) 385 goto leave; 386 did_quota_inode = 1; 387 388 /* do the real work now. */ 389 status = ocfs2_mknod_locked(osb, dir, inode, dev, 390 &new_fe_bh, parent_fe_bh, handle, 391 inode_ac); 392 if (status < 0) { 393 mlog_errno(status); 394 goto leave; 395 } 396 397 if (S_ISDIR(mode)) { 398 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 399 new_fe_bh, data_ac, meta_ac); 400 if (status < 0) { 401 mlog_errno(status); 402 goto leave; 403 } 404 405 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), 406 parent_fe_bh, 407 OCFS2_JOURNAL_ACCESS_WRITE); 408 if (status < 0) { 409 mlog_errno(status); 410 goto leave; 411 } 412 ocfs2_add_links_count(dirfe, 1); 413 ocfs2_journal_dirty(handle, parent_fe_bh); 414 inc_nlink(dir); 415 } 416 417 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, 418 meta_ac, data_ac); 419 420 if (status < 0) { 421 mlog_errno(status); 422 goto leave; 423 } 424 425 if (si.enable) { 426 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 427 meta_ac, data_ac); 428 if (status < 0) { 429 mlog_errno(status); 430 goto leave; 431 } 432 } 433 434 /* 435 * Do this before adding the entry to the directory. We add 436 * also set d_op after success so that ->d_iput() will cleanup 437 * the dentry lock even if ocfs2_add_entry() fails below. 438 */ 439 status = ocfs2_dentry_attach_lock(dentry, inode, 440 OCFS2_I(dir)->ip_blkno); 441 if (status) { 442 mlog_errno(status); 443 goto leave; 444 } 445 446 dl = dentry->d_fsdata; 447 448 status = ocfs2_add_entry(handle, dentry, inode, 449 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 450 &lookup); 451 if (status < 0) { 452 mlog_errno(status); 453 goto leave; 454 } 455 456 insert_inode_hash(inode); 457 d_instantiate(dentry, inode); 458 status = 0; 459leave: 460 if (status < 0 && did_quota_inode) 461 dquot_free_inode(inode); 462 if (handle) 463 ocfs2_commit_trans(osb, handle); 464 465 ocfs2_inode_unlock(dir, 1); 466 if (did_block_signals) 467 ocfs2_unblock_signals(&oldset); 468 469 brelse(new_fe_bh); 470 brelse(parent_fe_bh); 471 kfree(si.value); 472 473 ocfs2_free_dir_lookup_result(&lookup); 474 475 if (inode_ac) 476 ocfs2_free_alloc_context(inode_ac); 477 478 if (data_ac) 479 ocfs2_free_alloc_context(data_ac); 480 481 if (meta_ac) 482 ocfs2_free_alloc_context(meta_ac); 483 484 /* 485 * We should call iput after the i_mutex of the bitmap been 486 * unlocked in ocfs2_free_alloc_context, or the 487 * ocfs2_delete_inode will mutex_lock again. 488 */ 489 if ((status < 0) && inode) { 490 if (dl) 491 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 492 493 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 494 clear_nlink(inode); 495 iput(inode); 496 } 497 498 if (status) 499 mlog_errno(status); 500 501 return status; 502} 503 504static int __ocfs2_mknod_locked(struct inode *dir, 505 struct inode *inode, 506 dev_t dev, 507 struct buffer_head **new_fe_bh, 508 struct buffer_head *parent_fe_bh, 509 handle_t *handle, 510 struct ocfs2_alloc_context *inode_ac, 511 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) 512{ 513 int status = 0; 514 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 515 struct ocfs2_dinode *fe = NULL; 516 struct ocfs2_extent_list *fel; 517 u16 feat; 518 struct ocfs2_inode_info *oi = OCFS2_I(inode); 519 520 *new_fe_bh = NULL; 521 522 /* populate as many fields early on as possible - many of 523 * these are used by the support functions here and in 524 * callers. */ 525 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 526 OCFS2_I(inode)->ip_blkno = fe_blkno; 527 spin_lock(&osb->osb_lock); 528 inode->i_generation = osb->s_next_generation++; 529 spin_unlock(&osb->osb_lock); 530 531 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 532 if (!*new_fe_bh) { 533 status = -ENOMEM; 534 mlog_errno(status); 535 goto leave; 536 } 537 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); 538 539 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 540 *new_fe_bh, 541 OCFS2_JOURNAL_ACCESS_CREATE); 542 if (status < 0) { 543 mlog_errno(status); 544 goto leave; 545 } 546 547 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 548 memset(fe, 0, osb->sb->s_blocksize); 549 550 fe->i_generation = cpu_to_le32(inode->i_generation); 551 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 552 fe->i_blkno = cpu_to_le64(fe_blkno); 553 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); 554 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 555 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); 556 fe->i_uid = cpu_to_le32(i_uid_read(inode)); 557 fe->i_gid = cpu_to_le32(i_gid_read(inode)); 558 fe->i_mode = cpu_to_le16(inode->i_mode); 559 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) 560 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 561 562 ocfs2_set_links_count(fe, inode->i_nlink); 563 564 fe->i_last_eb_blk = 0; 565 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 566 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); 567 fe->i_atime = fe->i_ctime = fe->i_mtime = 568 cpu_to_le64(CURRENT_TIME.tv_sec); 569 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 570 cpu_to_le32(CURRENT_TIME.tv_nsec); 571 fe->i_dtime = 0; 572 573 /* 574 * If supported, directories start with inline data. If inline 575 * isn't supported, but indexing is, we start them as indexed. 576 */ 577 feat = le16_to_cpu(fe->i_dyn_features); 578 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { 579 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); 580 581 fe->id2.i_data.id_count = cpu_to_le16( 582 ocfs2_max_inline_data_with_xattr(osb->sb, fe)); 583 } else { 584 fel = &fe->id2.i_list; 585 fel->l_tree_depth = 0; 586 fel->l_next_free_rec = 0; 587 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 588 } 589 590 ocfs2_journal_dirty(handle, *new_fe_bh); 591 592 ocfs2_populate_inode(inode, fe, 1); 593 ocfs2_ci_set_new(osb, INODE_CACHE(inode)); 594 if (!ocfs2_mount_local(osb)) { 595 status = ocfs2_create_new_inode_locks(inode); 596 if (status < 0) 597 mlog_errno(status); 598 } 599 600 oi->i_sync_tid = handle->h_transaction->t_tid; 601 oi->i_datasync_tid = handle->h_transaction->t_tid; 602 603leave: 604 if (status < 0) { 605 if (*new_fe_bh) { 606 brelse(*new_fe_bh); 607 *new_fe_bh = NULL; 608 } 609 } 610 611 if (status) 612 mlog_errno(status); 613 return status; 614} 615 616static int ocfs2_mknod_locked(struct ocfs2_super *osb, 617 struct inode *dir, 618 struct inode *inode, 619 dev_t dev, 620 struct buffer_head **new_fe_bh, 621 struct buffer_head *parent_fe_bh, 622 handle_t *handle, 623 struct ocfs2_alloc_context *inode_ac) 624{ 625 int status = 0; 626 u64 suballoc_loc, fe_blkno = 0; 627 u16 suballoc_bit; 628 629 *new_fe_bh = NULL; 630 631 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, 632 inode_ac, &suballoc_loc, 633 &suballoc_bit, &fe_blkno); 634 if (status < 0) { 635 mlog_errno(status); 636 return status; 637 } 638 639 status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, 640 parent_fe_bh, handle, inode_ac, 641 fe_blkno, suballoc_loc, suballoc_bit); 642 if (status < 0) { 643 u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit); 644 int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode, 645 inode_ac->ac_bh, suballoc_bit, bg_blkno, 1); 646 if (tmp) 647 mlog_errno(tmp); 648 } 649 650 return status; 651} 652 653static int ocfs2_mkdir(struct inode *dir, 654 struct dentry *dentry, 655 umode_t mode) 656{ 657 int ret; 658 659 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, 660 OCFS2_I(dir)->ip_blkno, mode); 661 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 662 if (ret) 663 mlog_errno(ret); 664 665 return ret; 666} 667 668static int ocfs2_create(struct inode *dir, 669 struct dentry *dentry, 670 umode_t mode, 671 bool excl) 672{ 673 int ret; 674 675 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, 676 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); 677 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); 678 if (ret) 679 mlog_errno(ret); 680 681 return ret; 682} 683 684static int ocfs2_link(struct dentry *old_dentry, 685 struct inode *dir, 686 struct dentry *dentry) 687{ 688 handle_t *handle; 689 struct inode *inode = d_inode(old_dentry); 690 struct inode *old_dir = d_inode(old_dentry->d_parent); 691 int err; 692 struct buffer_head *fe_bh = NULL; 693 struct buffer_head *old_dir_bh = NULL; 694 struct buffer_head *parent_fe_bh = NULL; 695 struct ocfs2_dinode *fe = NULL; 696 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 697 struct ocfs2_dir_lookup_result lookup = { NULL, }; 698 sigset_t oldset; 699 u64 old_de_ino; 700 701 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, 702 old_dentry->d_name.len, old_dentry->d_name.name, 703 dentry->d_name.len, dentry->d_name.name); 704 705 if (S_ISDIR(inode->i_mode)) 706 return -EPERM; 707 708 err = dquot_initialize(dir); 709 if (err) { 710 mlog_errno(err); 711 return err; 712 } 713 714 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 715 &parent_fe_bh, dir, 0); 716 if (err < 0) { 717 if (err != -ENOENT) 718 mlog_errno(err); 719 return err; 720 } 721 722 /* make sure both dirs have bhs 723 * get an extra ref on old_dir_bh if old==new */ 724 if (!parent_fe_bh) { 725 if (old_dir_bh) { 726 parent_fe_bh = old_dir_bh; 727 get_bh(parent_fe_bh); 728 } else { 729 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); 730 err = -EIO; 731 goto out; 732 } 733 } 734 735 if (!dir->i_nlink) { 736 err = -ENOENT; 737 goto out; 738 } 739 740 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, 741 old_dentry->d_name.len, &old_de_ino); 742 if (err) { 743 err = -ENOENT; 744 goto out; 745 } 746 747 /* 748 * Check whether another node removed the source inode while we 749 * were in the vfs. 750 */ 751 if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 752 err = -ENOENT; 753 goto out; 754 } 755 756 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 757 dentry->d_name.len); 758 if (err) 759 goto out; 760 761 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 762 dentry->d_name.name, 763 dentry->d_name.len, &lookup); 764 if (err < 0) { 765 mlog_errno(err); 766 goto out; 767 } 768 769 err = ocfs2_inode_lock(inode, &fe_bh, 1); 770 if (err < 0) { 771 if (err != -ENOENT) 772 mlog_errno(err); 773 goto out; 774 } 775 776 fe = (struct ocfs2_dinode *) fe_bh->b_data; 777 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { 778 err = -EMLINK; 779 goto out_unlock_inode; 780 } 781 782 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); 783 if (IS_ERR(handle)) { 784 err = PTR_ERR(handle); 785 handle = NULL; 786 mlog_errno(err); 787 goto out_unlock_inode; 788 } 789 790 /* Starting to change things, restart is no longer possible. */ 791 ocfs2_block_signals(&oldset); 792 793 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 794 OCFS2_JOURNAL_ACCESS_WRITE); 795 if (err < 0) { 796 mlog_errno(err); 797 goto out_commit; 798 } 799 800 inc_nlink(inode); 801 inode->i_ctime = CURRENT_TIME; 802 ocfs2_set_links_count(fe, inode->i_nlink); 803 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 804 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 805 ocfs2_journal_dirty(handle, fe_bh); 806 807 err = ocfs2_add_entry(handle, dentry, inode, 808 OCFS2_I(inode)->ip_blkno, 809 parent_fe_bh, &lookup); 810 if (err) { 811 ocfs2_add_links_count(fe, -1); 812 drop_nlink(inode); 813 mlog_errno(err); 814 goto out_commit; 815 } 816 817 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 818 if (err) { 819 mlog_errno(err); 820 goto out_commit; 821 } 822 823 ihold(inode); 824 d_instantiate(dentry, inode); 825 826out_commit: 827 ocfs2_commit_trans(osb, handle); 828 ocfs2_unblock_signals(&oldset); 829out_unlock_inode: 830 ocfs2_inode_unlock(inode, 1); 831 832out: 833 ocfs2_double_unlock(old_dir, dir); 834 835 brelse(fe_bh); 836 brelse(parent_fe_bh); 837 brelse(old_dir_bh); 838 839 ocfs2_free_dir_lookup_result(&lookup); 840 841 if (err) 842 mlog_errno(err); 843 844 return err; 845} 846 847/* 848 * Takes and drops an exclusive lock on the given dentry. This will 849 * force other nodes to drop it. 850 */ 851static int ocfs2_remote_dentry_delete(struct dentry *dentry) 852{ 853 int ret; 854 855 ret = ocfs2_dentry_lock(dentry, 1); 856 if (ret) 857 mlog_errno(ret); 858 else 859 ocfs2_dentry_unlock(dentry, 1); 860 861 return ret; 862} 863 864static inline int ocfs2_inode_is_unlinkable(struct inode *inode) 865{ 866 if (S_ISDIR(inode->i_mode)) { 867 if (inode->i_nlink == 2) 868 return 1; 869 return 0; 870 } 871 872 if (inode->i_nlink == 1) 873 return 1; 874 return 0; 875} 876 877static int ocfs2_unlink(struct inode *dir, 878 struct dentry *dentry) 879{ 880 int status; 881 int child_locked = 0; 882 bool is_unlinkable = false; 883 struct inode *inode = d_inode(dentry); 884 struct inode *orphan_dir = NULL; 885 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 886 u64 blkno; 887 struct ocfs2_dinode *fe = NULL; 888 struct buffer_head *fe_bh = NULL; 889 struct buffer_head *parent_node_bh = NULL; 890 handle_t *handle = NULL; 891 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 892 struct ocfs2_dir_lookup_result lookup = { NULL, }; 893 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 894 895 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, 896 dentry->d_name.name, 897 (unsigned long long)OCFS2_I(dir)->ip_blkno, 898 (unsigned long long)OCFS2_I(inode)->ip_blkno); 899 900 status = dquot_initialize(dir); 901 if (status) { 902 mlog_errno(status); 903 return status; 904 } 905 906 BUG_ON(d_inode(dentry->d_parent) != dir); 907 908 if (inode == osb->root_inode) 909 return -EPERM; 910 911 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, 912 OI_LS_PARENT); 913 if (status < 0) { 914 if (status != -ENOENT) 915 mlog_errno(status); 916 return status; 917 } 918 919 status = ocfs2_find_files_on_disk(dentry->d_name.name, 920 dentry->d_name.len, &blkno, dir, 921 &lookup); 922 if (status < 0) { 923 if (status != -ENOENT) 924 mlog_errno(status); 925 goto leave; 926 } 927 928 if (OCFS2_I(inode)->ip_blkno != blkno) { 929 status = -ENOENT; 930 931 trace_ocfs2_unlink_noent( 932 (unsigned long long)OCFS2_I(inode)->ip_blkno, 933 (unsigned long long)blkno, 934 OCFS2_I(inode)->ip_flags); 935 goto leave; 936 } 937 938 status = ocfs2_inode_lock(inode, &fe_bh, 1); 939 if (status < 0) { 940 if (status != -ENOENT) 941 mlog_errno(status); 942 goto leave; 943 } 944 child_locked = 1; 945 946 if (S_ISDIR(inode->i_mode)) { 947 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { 948 status = -ENOTEMPTY; 949 goto leave; 950 } 951 } 952 953 status = ocfs2_remote_dentry_delete(dentry); 954 if (status < 0) { 955 /* This remote delete should succeed under all normal 956 * circumstances. */ 957 mlog_errno(status); 958 goto leave; 959 } 960 961 if (ocfs2_inode_is_unlinkable(inode)) { 962 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 963 OCFS2_I(inode)->ip_blkno, 964 orphan_name, &orphan_insert, 965 false); 966 if (status < 0) { 967 mlog_errno(status); 968 goto leave; 969 } 970 is_unlinkable = true; 971 } 972 973 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); 974 if (IS_ERR(handle)) { 975 status = PTR_ERR(handle); 976 handle = NULL; 977 mlog_errno(status); 978 goto leave; 979 } 980 981 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, 982 OCFS2_JOURNAL_ACCESS_WRITE); 983 if (status < 0) { 984 mlog_errno(status); 985 goto leave; 986 } 987 988 fe = (struct ocfs2_dinode *) fe_bh->b_data; 989 990 /* delete the name from the parent dir */ 991 status = ocfs2_delete_entry(handle, dir, &lookup); 992 if (status < 0) { 993 mlog_errno(status); 994 goto leave; 995 } 996 997 if (S_ISDIR(inode->i_mode)) 998 drop_nlink(inode); 999 drop_nlink(inode); 1000 ocfs2_set_links_count(fe, inode->i_nlink); 1001 ocfs2_journal_dirty(handle, fe_bh); 1002 1003 dir->i_ctime = dir->i_mtime = CURRENT_TIME; 1004 if (S_ISDIR(inode->i_mode)) 1005 drop_nlink(dir); 1006 1007 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 1008 if (status < 0) { 1009 mlog_errno(status); 1010 if (S_ISDIR(inode->i_mode)) 1011 inc_nlink(dir); 1012 goto leave; 1013 } 1014 1015 if (is_unlinkable) { 1016 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, 1017 orphan_name, &orphan_insert, orphan_dir, false); 1018 if (status < 0) 1019 mlog_errno(status); 1020 } 1021 1022leave: 1023 if (handle) 1024 ocfs2_commit_trans(osb, handle); 1025 1026 if (orphan_dir) { 1027 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1028 ocfs2_inode_unlock(orphan_dir, 1); 1029 mutex_unlock(&orphan_dir->i_mutex); 1030 iput(orphan_dir); 1031 } 1032 1033 if (child_locked) 1034 ocfs2_inode_unlock(inode, 1); 1035 1036 ocfs2_inode_unlock(dir, 1); 1037 1038 brelse(fe_bh); 1039 brelse(parent_node_bh); 1040 1041 ocfs2_free_dir_lookup_result(&orphan_insert); 1042 ocfs2_free_dir_lookup_result(&lookup); 1043 1044 if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) 1045 mlog_errno(status); 1046 1047 return status; 1048} 1049 1050static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, 1051 u64 src_inode_no, u64 dest_inode_no) 1052{ 1053 int ret = 0, i = 0; 1054 u64 parent_inode_no = 0; 1055 u64 child_inode_no = src_inode_no; 1056 struct inode *child_inode; 1057 1058#define MAX_LOOKUP_TIMES 32 1059 while (1) { 1060 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); 1061 if (IS_ERR(child_inode)) { 1062 ret = PTR_ERR(child_inode); 1063 break; 1064 } 1065 1066 ret = ocfs2_inode_lock(child_inode, NULL, 0); 1067 if (ret < 0) { 1068 iput(child_inode); 1069 if (ret != -ENOENT) 1070 mlog_errno(ret); 1071 break; 1072 } 1073 1074 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, 1075 &parent_inode_no); 1076 ocfs2_inode_unlock(child_inode, 0); 1077 iput(child_inode); 1078 if (ret < 0) { 1079 ret = -ENOENT; 1080 break; 1081 } 1082 1083 if (parent_inode_no == dest_inode_no) { 1084 ret = 1; 1085 break; 1086 } 1087 1088 if (parent_inode_no == osb->root_inode->i_ino) { 1089 ret = 0; 1090 break; 1091 } 1092 1093 child_inode_no = parent_inode_no; 1094 1095 if (++i >= MAX_LOOKUP_TIMES) { 1096 mlog(ML_NOTICE, "max lookup times reached, filesystem " 1097 "may have nested directories, " 1098 "src inode: %llu, dest inode: %llu.\n", 1099 (unsigned long long)src_inode_no, 1100 (unsigned long long)dest_inode_no); 1101 ret = 0; 1102 break; 1103 } 1104 } 1105 1106 return ret; 1107} 1108 1109/* 1110 * The only place this should be used is rename and link! 1111 * if they have the same id, then the 1st one is the only one locked. 1112 */ 1113static int ocfs2_double_lock(struct ocfs2_super *osb, 1114 struct buffer_head **bh1, 1115 struct inode *inode1, 1116 struct buffer_head **bh2, 1117 struct inode *inode2, 1118 int rename) 1119{ 1120 int status; 1121 int inode1_is_ancestor, inode2_is_ancestor; 1122 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 1123 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 1124 1125 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, 1126 (unsigned long long)oi2->ip_blkno); 1127 1128 if (*bh1) 1129 *bh1 = NULL; 1130 if (*bh2) 1131 *bh2 = NULL; 1132 1133 /* we always want to lock the one with the lower lockid first. 1134 * and if they are nested, we lock ancestor first */ 1135 if (oi1->ip_blkno != oi2->ip_blkno) { 1136 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, 1137 oi1->ip_blkno); 1138 if (inode1_is_ancestor < 0) { 1139 status = inode1_is_ancestor; 1140 goto bail; 1141 } 1142 1143 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, 1144 oi2->ip_blkno); 1145 if (inode2_is_ancestor < 0) { 1146 status = inode2_is_ancestor; 1147 goto bail; 1148 } 1149 1150 if ((inode1_is_ancestor == 1) || 1151 (oi1->ip_blkno < oi2->ip_blkno && 1152 inode2_is_ancestor == 0)) { 1153 /* switch id1 and id2 around */ 1154 swap(bh2, bh1); 1155 swap(inode2, inode1); 1156 } 1157 /* lock id2 */ 1158 status = ocfs2_inode_lock_nested(inode2, bh2, 1, 1159 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); 1160 if (status < 0) { 1161 if (status != -ENOENT) 1162 mlog_errno(status); 1163 goto bail; 1164 } 1165 } 1166 1167 /* lock id1 */ 1168 status = ocfs2_inode_lock_nested(inode1, bh1, 1, 1169 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 1170 if (status < 0) { 1171 /* 1172 * An error return must mean that no cluster locks 1173 * were held on function exit. 1174 */ 1175 if (oi1->ip_blkno != oi2->ip_blkno) { 1176 ocfs2_inode_unlock(inode2, 1); 1177 brelse(*bh2); 1178 *bh2 = NULL; 1179 } 1180 1181 if (status != -ENOENT) 1182 mlog_errno(status); 1183 } 1184 1185 trace_ocfs2_double_lock_end( 1186 (unsigned long long)OCFS2_I(inode1)->ip_blkno, 1187 (unsigned long long)OCFS2_I(inode2)->ip_blkno); 1188 1189bail: 1190 if (status) 1191 mlog_errno(status); 1192 return status; 1193} 1194 1195static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1196{ 1197 ocfs2_inode_unlock(inode1, 1); 1198 1199 if (inode1 != inode2) 1200 ocfs2_inode_unlock(inode2, 1); 1201} 1202 1203static int ocfs2_rename(struct inode *old_dir, 1204 struct dentry *old_dentry, 1205 struct inode *new_dir, 1206 struct dentry *new_dentry) 1207{ 1208 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; 1209 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; 1210 struct inode *old_inode = d_inode(old_dentry); 1211 struct inode *new_inode = d_inode(new_dentry); 1212 struct inode *orphan_dir = NULL; 1213 struct ocfs2_dinode *newfe = NULL; 1214 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1215 struct buffer_head *newfe_bh = NULL; 1216 struct buffer_head *old_inode_bh = NULL; 1217 struct ocfs2_super *osb = NULL; 1218 u64 newfe_blkno, old_de_ino; 1219 handle_t *handle = NULL; 1220 struct buffer_head *old_dir_bh = NULL; 1221 struct buffer_head *new_dir_bh = NULL; 1222 u32 old_dir_nlink = old_dir->i_nlink; 1223 struct ocfs2_dinode *old_di; 1224 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; 1225 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; 1226 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; 1227 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 1228 struct ocfs2_dir_lookup_result target_insert = { NULL, }; 1229 bool should_add_orphan = false; 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 new_dir->i_version++; 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 } 1539 1540 old_inode->i_ctime = CURRENT_TIME; 1541 mark_inode_dirty(old_inode); 1542 1543 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), 1544 old_inode_bh, 1545 OCFS2_JOURNAL_ACCESS_WRITE); 1546 if (status >= 0) { 1547 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; 1548 1549 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); 1550 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); 1551 ocfs2_journal_dirty(handle, old_inode_bh); 1552 } else 1553 mlog_errno(status); 1554 1555 /* 1556 * Now that the name has been added to new_dir, remove the old name. 1557 * 1558 * We don't keep any directory entry context around until now 1559 * because the insert might have changed the type of directory 1560 * we're dealing with. 1561 */ 1562 status = ocfs2_find_entry(old_dentry->d_name.name, 1563 old_dentry->d_name.len, old_dir, 1564 &old_entry_lookup); 1565 if (status) { 1566 if (!is_journal_aborted(osb->journal->j_journal)) { 1567 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1568 "is not deleted.", 1569 new_dentry->d_name.len, new_dentry->d_name.name, 1570 old_dentry->d_name.len, old_dentry->d_name.name); 1571 } 1572 goto bail; 1573 } 1574 1575 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); 1576 if (status < 0) { 1577 mlog_errno(status); 1578 if (!is_journal_aborted(osb->journal->j_journal)) { 1579 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " 1580 "is not deleted.", 1581 new_dentry->d_name.len, new_dentry->d_name.name, 1582 old_dentry->d_name.len, old_dentry->d_name.name); 1583 } 1584 goto bail; 1585 } 1586 1587 if (new_inode) { 1588 drop_nlink(new_inode); 1589 new_inode->i_ctime = CURRENT_TIME; 1590 } 1591 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; 1592 1593 if (update_dot_dot) { 1594 status = ocfs2_update_entry(old_inode, handle, 1595 &old_inode_dot_dot_res, new_dir); 1596 drop_nlink(old_dir); 1597 if (new_inode) { 1598 drop_nlink(new_inode); 1599 } else { 1600 inc_nlink(new_dir); 1601 mark_inode_dirty(new_dir); 1602 } 1603 } 1604 mark_inode_dirty(old_dir); 1605 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1606 if (new_inode) { 1607 mark_inode_dirty(new_inode); 1608 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1609 } 1610 1611 if (old_dir != new_dir) { 1612 /* Keep the same times on both directories.*/ 1613 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1614 1615 /* 1616 * This will also pick up the i_nlink change from the 1617 * block above. 1618 */ 1619 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1620 } 1621 1622 if (old_dir_nlink != old_dir->i_nlink) { 1623 if (!old_dir_bh) { 1624 mlog(ML_ERROR, "need to change nlink for old dir " 1625 "%llu from %d to %d but bh is NULL!\n", 1626 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1627 (int)old_dir_nlink, old_dir->i_nlink); 1628 } else { 1629 struct ocfs2_dinode *fe; 1630 status = ocfs2_journal_access_di(handle, 1631 INODE_CACHE(old_dir), 1632 old_dir_bh, 1633 OCFS2_JOURNAL_ACCESS_WRITE); 1634 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1635 ocfs2_set_links_count(fe, old_dir->i_nlink); 1636 ocfs2_journal_dirty(handle, old_dir_bh); 1637 } 1638 } 1639 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1640 status = 0; 1641bail: 1642 if (handle) 1643 ocfs2_commit_trans(osb, handle); 1644 1645 if (orphan_dir) { 1646 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1647 ocfs2_inode_unlock(orphan_dir, 1); 1648 mutex_unlock(&orphan_dir->i_mutex); 1649 iput(orphan_dir); 1650 } 1651 1652 if (new_child_locked) 1653 ocfs2_inode_unlock(new_inode, 1); 1654 1655 if (old_child_locked) 1656 ocfs2_inode_unlock(old_inode, 1); 1657 1658 if (parents_locked) 1659 ocfs2_double_unlock(old_dir, new_dir); 1660 1661 if (rename_lock) 1662 ocfs2_rename_unlock(osb); 1663 1664 if (new_inode) 1665 sync_mapping_buffers(old_inode->i_mapping); 1666 1667 if (new_inode) 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 .enable = 1, 1810 }; 1811 int did_quota = 0, did_quota_inode = 0; 1812 struct ocfs2_dir_lookup_result lookup = { NULL, }; 1813 sigset_t oldset; 1814 int did_block_signals = 0; 1815 struct ocfs2_dentry_lock *dl = NULL; 1816 1817 trace_ocfs2_symlink_begin(dir, dentry, symname, 1818 dentry->d_name.len, dentry->d_name.name); 1819 1820 status = dquot_initialize(dir); 1821 if (status) { 1822 mlog_errno(status); 1823 goto bail; 1824 } 1825 1826 sb = dir->i_sb; 1827 osb = OCFS2_SB(sb); 1828 1829 l = strlen(symname) + 1; 1830 1831 credits = ocfs2_calc_symlink_credits(sb); 1832 1833 /* lock the parent directory */ 1834 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); 1835 if (status < 0) { 1836 if (status != -ENOENT) 1837 mlog_errno(status); 1838 return status; 1839 } 1840 1841 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1842 if (!ocfs2_read_links_count(dirfe)) { 1843 /* can't make a file in a deleted directory. */ 1844 status = -ENOENT; 1845 goto bail; 1846 } 1847 1848 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1849 dentry->d_name.len); 1850 if (status) 1851 goto bail; 1852 1853 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1854 dentry->d_name.name, 1855 dentry->d_name.len, &lookup); 1856 if (status < 0) { 1857 mlog_errno(status); 1858 goto bail; 1859 } 1860 1861 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1862 if (status < 0) { 1863 if (status != -ENOSPC) 1864 mlog_errno(status); 1865 goto bail; 1866 } 1867 1868 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); 1869 if (IS_ERR(inode)) { 1870 status = PTR_ERR(inode); 1871 inode = NULL; 1872 mlog_errno(status); 1873 goto bail; 1874 } 1875 1876 /* get security xattr */ 1877 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); 1878 if (status) { 1879 if (status == -EOPNOTSUPP) 1880 si.enable = 0; 1881 else { 1882 mlog_errno(status); 1883 goto bail; 1884 } 1885 } 1886 1887 /* calculate meta data/clusters for setting security xattr */ 1888 if (si.enable) { 1889 status = ocfs2_calc_security_init(dir, &si, &want_clusters, 1890 &xattr_credits, &xattr_ac); 1891 if (status < 0) { 1892 mlog_errno(status); 1893 goto bail; 1894 } 1895 } 1896 1897 /* don't reserve bitmap space for fast symlinks. */ 1898 if (l > ocfs2_fast_symlink_chars(sb)) 1899 want_clusters += 1; 1900 1901 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); 1902 if (status < 0) { 1903 if (status != -ENOSPC) 1904 mlog_errno(status); 1905 goto bail; 1906 } 1907 1908 handle = ocfs2_start_trans(osb, credits + xattr_credits); 1909 if (IS_ERR(handle)) { 1910 status = PTR_ERR(handle); 1911 handle = NULL; 1912 mlog_errno(status); 1913 goto bail; 1914 } 1915 1916 /* Starting to change things, restart is no longer possible. */ 1917 ocfs2_block_signals(&oldset); 1918 did_block_signals = 1; 1919 1920 status = dquot_alloc_inode(inode); 1921 if (status) 1922 goto bail; 1923 did_quota_inode = 1; 1924 1925 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, 1926 dentry->d_name.name, 1927 (unsigned long long)OCFS2_I(dir)->ip_blkno, 1928 inode->i_mode); 1929 1930 status = ocfs2_mknod_locked(osb, dir, inode, 1931 0, &new_fe_bh, parent_fe_bh, handle, 1932 inode_ac); 1933 if (status < 0) { 1934 mlog_errno(status); 1935 goto bail; 1936 } 1937 1938 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1939 inode->i_rdev = 0; 1940 newsize = l - 1; 1941 inode->i_op = &ocfs2_symlink_inode_operations; 1942 if (l > ocfs2_fast_symlink_chars(sb)) { 1943 u32 offset = 0; 1944 1945 status = dquot_alloc_space_nodirty(inode, 1946 ocfs2_clusters_to_bytes(osb->sb, 1)); 1947 if (status) 1948 goto bail; 1949 did_quota = 1; 1950 inode->i_mapping->a_ops = &ocfs2_aops; 1951 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, 1952 new_fe_bh, 1953 handle, data_ac, NULL, 1954 NULL); 1955 if (status < 0) { 1956 if (status != -ENOSPC && status != -EINTR) { 1957 mlog(ML_ERROR, 1958 "Failed to extend file to %llu\n", 1959 (unsigned long long)newsize); 1960 mlog_errno(status); 1961 status = -ENOSPC; 1962 } 1963 goto bail; 1964 } 1965 i_size_write(inode, newsize); 1966 inode->i_blocks = ocfs2_inode_sector_count(inode); 1967 } else { 1968 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops; 1969 memcpy((char *) fe->id2.i_symlink, symname, l); 1970 i_size_write(inode, newsize); 1971 inode->i_blocks = 0; 1972 } 1973 1974 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1975 if (status < 0) { 1976 mlog_errno(status); 1977 goto bail; 1978 } 1979 1980 if (!ocfs2_inode_is_fast_symlink(inode)) { 1981 status = ocfs2_create_symlink_data(osb, handle, inode, 1982 symname); 1983 if (status < 0) { 1984 mlog_errno(status); 1985 goto bail; 1986 } 1987 } 1988 1989 if (si.enable) { 1990 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, 1991 xattr_ac, data_ac); 1992 if (status < 0) { 1993 mlog_errno(status); 1994 goto bail; 1995 } 1996 } 1997 1998 /* 1999 * Do this before adding the entry to the directory. We add 2000 * also set d_op after success so that ->d_iput() will cleanup 2001 * the dentry lock even if ocfs2_add_entry() fails below. 2002 */ 2003 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 2004 if (status) { 2005 mlog_errno(status); 2006 goto bail; 2007 } 2008 2009 dl = dentry->d_fsdata; 2010 2011 status = ocfs2_add_entry(handle, dentry, inode, 2012 le64_to_cpu(fe->i_blkno), parent_fe_bh, 2013 &lookup); 2014 if (status < 0) { 2015 mlog_errno(status); 2016 goto bail; 2017 } 2018 2019 insert_inode_hash(inode); 2020 d_instantiate(dentry, inode); 2021bail: 2022 if (status < 0 && did_quota) 2023 dquot_free_space_nodirty(inode, 2024 ocfs2_clusters_to_bytes(osb->sb, 1)); 2025 if (status < 0 && did_quota_inode) 2026 dquot_free_inode(inode); 2027 if (handle) 2028 ocfs2_commit_trans(osb, handle); 2029 2030 ocfs2_inode_unlock(dir, 1); 2031 if (did_block_signals) 2032 ocfs2_unblock_signals(&oldset); 2033 2034 brelse(new_fe_bh); 2035 brelse(parent_fe_bh); 2036 kfree(si.value); 2037 ocfs2_free_dir_lookup_result(&lookup); 2038 if (inode_ac) 2039 ocfs2_free_alloc_context(inode_ac); 2040 if (data_ac) 2041 ocfs2_free_alloc_context(data_ac); 2042 if (xattr_ac) 2043 ocfs2_free_alloc_context(xattr_ac); 2044 if ((status < 0) && inode) { 2045 if (dl) 2046 ocfs2_cleanup_add_entry_failure(osb, dentry, inode); 2047 2048 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; 2049 clear_nlink(inode); 2050 iput(inode); 2051 } 2052 2053 if (status) 2054 mlog_errno(status); 2055 2056 return status; 2057} 2058 2059static int ocfs2_blkno_stringify(u64 blkno, char *name) 2060{ 2061 int status, namelen; 2062 2063 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2064 (long long)blkno); 2065 if (namelen <= 0) { 2066 if (namelen) 2067 status = namelen; 2068 else 2069 status = -EINVAL; 2070 mlog_errno(status); 2071 goto bail; 2072 } 2073 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2074 status = -EINVAL; 2075 mlog_errno(status); 2076 goto bail; 2077 } 2078 2079 trace_ocfs2_blkno_stringify(blkno, name, namelen); 2080 2081 status = 0; 2082bail: 2083 if (status < 0) 2084 mlog_errno(status); 2085 return status; 2086} 2087 2088static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, 2089 struct inode **ret_orphan_dir, 2090 struct buffer_head **ret_orphan_dir_bh) 2091{ 2092 struct inode *orphan_dir_inode; 2093 struct buffer_head *orphan_dir_bh = NULL; 2094 int ret = 0; 2095 2096 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2097 ORPHAN_DIR_SYSTEM_INODE, 2098 osb->slot_num); 2099 if (!orphan_dir_inode) { 2100 ret = -ENOENT; 2101 mlog_errno(ret); 2102 return ret; 2103 } 2104 2105 mutex_lock(&orphan_dir_inode->i_mutex); 2106 2107 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2108 if (ret < 0) { 2109 mutex_unlock(&orphan_dir_inode->i_mutex); 2110 iput(orphan_dir_inode); 2111 2112 mlog_errno(ret); 2113 return ret; 2114 } 2115 2116 *ret_orphan_dir = orphan_dir_inode; 2117 *ret_orphan_dir_bh = orphan_dir_bh; 2118 2119 return 0; 2120} 2121 2122static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, 2123 struct buffer_head *orphan_dir_bh, 2124 u64 blkno, 2125 char *name, 2126 struct ocfs2_dir_lookup_result *lookup, 2127 bool dio) 2128{ 2129 int ret; 2130 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); 2131 int namelen = dio ? 2132 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2133 OCFS2_ORPHAN_NAMELEN; 2134 2135 if (dio) { 2136 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2137 OCFS2_DIO_ORPHAN_PREFIX); 2138 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2139 ret = -EINVAL; 2140 mlog_errno(ret); 2141 return ret; 2142 } 2143 2144 ret = ocfs2_blkno_stringify(blkno, 2145 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2146 } else 2147 ret = ocfs2_blkno_stringify(blkno, name); 2148 if (ret < 0) { 2149 mlog_errno(ret); 2150 return ret; 2151 } 2152 2153 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2154 orphan_dir_bh, name, 2155 namelen, lookup); 2156 if (ret < 0) { 2157 mlog_errno(ret); 2158 return ret; 2159 } 2160 2161 return 0; 2162} 2163 2164/** 2165 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for 2166 * insertion of an orphan. 2167 * @osb: ocfs2 file system 2168 * @ret_orphan_dir: Orphan dir inode - returned locked! 2169 * @blkno: Actual block number of the inode to be inserted into orphan dir. 2170 * @lookup: dir lookup result, to be passed back into functions like 2171 * ocfs2_orphan_add 2172 * 2173 * Returns zero on success and the ret_orphan_dir, name and lookup 2174 * fields will be populated. 2175 * 2176 * Returns non-zero on failure. 2177 */ 2178static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2179 struct inode **ret_orphan_dir, 2180 u64 blkno, 2181 char *name, 2182 struct ocfs2_dir_lookup_result *lookup, 2183 bool dio) 2184{ 2185 struct inode *orphan_dir_inode = NULL; 2186 struct buffer_head *orphan_dir_bh = NULL; 2187 int ret = 0; 2188 2189 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, 2190 &orphan_dir_bh); 2191 if (ret < 0) { 2192 mlog_errno(ret); 2193 return ret; 2194 } 2195 2196 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, 2197 blkno, name, lookup, dio); 2198 if (ret < 0) { 2199 mlog_errno(ret); 2200 goto out; 2201 } 2202 2203 *ret_orphan_dir = orphan_dir_inode; 2204 2205out: 2206 brelse(orphan_dir_bh); 2207 2208 if (ret) { 2209 ocfs2_inode_unlock(orphan_dir_inode, 1); 2210 mutex_unlock(&orphan_dir_inode->i_mutex); 2211 iput(orphan_dir_inode); 2212 } 2213 2214 if (ret) 2215 mlog_errno(ret); 2216 return ret; 2217} 2218 2219static int ocfs2_orphan_add(struct ocfs2_super *osb, 2220 handle_t *handle, 2221 struct inode *inode, 2222 struct buffer_head *fe_bh, 2223 char *name, 2224 struct ocfs2_dir_lookup_result *lookup, 2225 struct inode *orphan_dir_inode, 2226 bool dio) 2227{ 2228 struct buffer_head *orphan_dir_bh = NULL; 2229 int status = 0; 2230 struct ocfs2_dinode *orphan_fe; 2231 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; 2232 int namelen = dio ? 2233 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : 2234 OCFS2_ORPHAN_NAMELEN; 2235 2236 trace_ocfs2_orphan_add_begin( 2237 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2238 2239 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); 2240 if (status < 0) { 2241 mlog_errno(status); 2242 goto leave; 2243 } 2244 2245 status = ocfs2_journal_access_di(handle, 2246 INODE_CACHE(orphan_dir_inode), 2247 orphan_dir_bh, 2248 OCFS2_JOURNAL_ACCESS_WRITE); 2249 if (status < 0) { 2250 mlog_errno(status); 2251 goto leave; 2252 } 2253 2254 /* 2255 * We're going to journal the change of i_flags and i_orphaned_slot. 2256 * It's safe anyway, though some callers may duplicate the journaling. 2257 * Journaling within the func just make the logic look more 2258 * straightforward. 2259 */ 2260 status = ocfs2_journal_access_di(handle, 2261 INODE_CACHE(inode), 2262 fe_bh, 2263 OCFS2_JOURNAL_ACCESS_WRITE); 2264 if (status < 0) { 2265 mlog_errno(status); 2266 goto leave; 2267 } 2268 2269 /* we're a cluster, and nlink can change on disk from 2270 * underneath us... */ 2271 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2272 if (S_ISDIR(inode->i_mode)) 2273 ocfs2_add_links_count(orphan_fe, 1); 2274 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2275 ocfs2_journal_dirty(handle, orphan_dir_bh); 2276 2277 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2278 namelen, inode, 2279 OCFS2_I(inode)->ip_blkno, 2280 orphan_dir_bh, lookup); 2281 if (status < 0) { 2282 mlog_errno(status); 2283 goto rollback; 2284 } 2285 2286 if (dio) { 2287 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan 2288 * slot. 2289 */ 2290 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2291 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); 2292 } else { 2293 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL); 2294 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; 2295 2296 /* Record which orphan dir our inode now resides 2297 * in. delete_inode will use this to determine which orphan 2298 * dir to lock. */ 2299 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2300 } 2301 2302 ocfs2_journal_dirty(handle, fe_bh); 2303 2304 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, 2305 osb->slot_num); 2306 2307rollback: 2308 if (status < 0) { 2309 if (S_ISDIR(inode->i_mode)) 2310 ocfs2_add_links_count(orphan_fe, -1); 2311 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2312 } 2313 2314leave: 2315 brelse(orphan_dir_bh); 2316 2317 return status; 2318} 2319 2320/* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2321int ocfs2_orphan_del(struct ocfs2_super *osb, 2322 handle_t *handle, 2323 struct inode *orphan_dir_inode, 2324 struct inode *inode, 2325 struct buffer_head *orphan_dir_bh, 2326 bool dio) 2327{ 2328 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN; 2329 char name[namelen + 1]; 2330 struct ocfs2_dinode *orphan_fe; 2331 int status = 0; 2332 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2333 2334 if (dio) { 2335 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", 2336 OCFS2_DIO_ORPHAN_PREFIX); 2337 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { 2338 status = -EINVAL; 2339 mlog_errno(status); 2340 return status; 2341 } 2342 2343 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, 2344 name + OCFS2_DIO_ORPHAN_PREFIX_LEN); 2345 } else 2346 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2347 if (status < 0) { 2348 mlog_errno(status); 2349 goto leave; 2350 } 2351 2352 trace_ocfs2_orphan_del( 2353 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2354 name, strlen(name)); 2355 2356 /* find it's spot in the orphan directory */ 2357 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode, 2358 &lookup); 2359 if (status) { 2360 mlog_errno(status); 2361 goto leave; 2362 } 2363 2364 /* remove it from the orphan directory */ 2365 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); 2366 if (status < 0) { 2367 mlog_errno(status); 2368 goto leave; 2369 } 2370 2371 status = ocfs2_journal_access_di(handle, 2372 INODE_CACHE(orphan_dir_inode), 2373 orphan_dir_bh, 2374 OCFS2_JOURNAL_ACCESS_WRITE); 2375 if (status < 0) { 2376 mlog_errno(status); 2377 goto leave; 2378 } 2379 2380 /* do the i_nlink dance! :) */ 2381 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2382 if (S_ISDIR(inode->i_mode)) 2383 ocfs2_add_links_count(orphan_fe, -1); 2384 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); 2385 ocfs2_journal_dirty(handle, orphan_dir_bh); 2386 2387leave: 2388 ocfs2_free_dir_lookup_result(&lookup); 2389 2390 if (status) 2391 mlog_errno(status); 2392 return status; 2393} 2394 2395/** 2396 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly 2397 * allocated file. This is different from the typical 'add to orphan dir' 2398 * operation in that the inode does not yet exist. This is a problem because 2399 * the orphan dir stringifies the inode block number to come up with it's 2400 * dirent. Obviously if the inode does not yet exist we have a chicken and egg 2401 * problem. This function works around it by calling deeper into the orphan 2402 * and suballoc code than other callers. Use this only by necessity. 2403 * @dir: The directory which this inode will ultimately wind up under - not the 2404 * orphan dir! 2405 * @dir_bh: buffer_head the @dir inode block 2406 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled 2407 * with the string to be used for orphan dirent. Pass back to the orphan dir 2408 * code. 2409 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan 2410 * dir code. 2411 * @ret_di_blkno: block number where the new inode will be allocated. 2412 * @orphan_insert: Dir insert context to be passed back into orphan dir code. 2413 * @ret_inode_ac: Inode alloc context to be passed back to the allocator. 2414 * 2415 * Returns zero on success and the ret_orphan_dir, name and lookup 2416 * fields will be populated. 2417 * 2418 * Returns non-zero on failure. 2419 */ 2420static int ocfs2_prep_new_orphaned_file(struct inode *dir, 2421 struct buffer_head *dir_bh, 2422 char *orphan_name, 2423 struct inode **ret_orphan_dir, 2424 u64 *ret_di_blkno, 2425 struct ocfs2_dir_lookup_result *orphan_insert, 2426 struct ocfs2_alloc_context **ret_inode_ac) 2427{ 2428 int ret; 2429 u64 di_blkno; 2430 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2431 struct inode *orphan_dir = NULL; 2432 struct buffer_head *orphan_dir_bh = NULL; 2433 struct ocfs2_alloc_context *inode_ac = NULL; 2434 2435 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); 2436 if (ret < 0) { 2437 mlog_errno(ret); 2438 return ret; 2439 } 2440 2441 /* reserve an inode spot */ 2442 ret = ocfs2_reserve_new_inode(osb, &inode_ac); 2443 if (ret < 0) { 2444 if (ret != -ENOSPC) 2445 mlog_errno(ret); 2446 goto out; 2447 } 2448 2449 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, 2450 &di_blkno); 2451 if (ret) { 2452 mlog_errno(ret); 2453 goto out; 2454 } 2455 2456 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, 2457 di_blkno, orphan_name, orphan_insert, 2458 false); 2459 if (ret < 0) { 2460 mlog_errno(ret); 2461 goto out; 2462 } 2463 2464out: 2465 if (ret == 0) { 2466 *ret_orphan_dir = orphan_dir; 2467 *ret_di_blkno = di_blkno; 2468 *ret_inode_ac = inode_ac; 2469 /* 2470 * orphan_name and orphan_insert are already up to 2471 * date via prepare_orphan_dir 2472 */ 2473 } else { 2474 /* Unroll reserve_new_inode* */ 2475 if (inode_ac) 2476 ocfs2_free_alloc_context(inode_ac); 2477 2478 /* Unroll orphan dir locking */ 2479 mutex_unlock(&orphan_dir->i_mutex); 2480 ocfs2_inode_unlock(orphan_dir, 1); 2481 iput(orphan_dir); 2482 } 2483 2484 brelse(orphan_dir_bh); 2485 2486 return ret; 2487} 2488 2489int ocfs2_create_inode_in_orphan(struct inode *dir, 2490 int mode, 2491 struct inode **new_inode) 2492{ 2493 int status, did_quota_inode = 0; 2494 struct inode *inode = NULL; 2495 struct inode *orphan_dir = NULL; 2496 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2497 struct ocfs2_dinode *di = NULL; 2498 handle_t *handle = NULL; 2499 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 2500 struct buffer_head *parent_di_bh = NULL; 2501 struct buffer_head *new_di_bh = NULL; 2502 struct ocfs2_alloc_context *inode_ac = NULL; 2503 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2504 u64 uninitialized_var(di_blkno), suballoc_loc; 2505 u16 suballoc_bit; 2506 2507 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2508 if (status < 0) { 2509 if (status != -ENOENT) 2510 mlog_errno(status); 2511 return status; 2512 } 2513 2514 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, 2515 orphan_name, &orphan_dir, 2516 &di_blkno, &orphan_insert, &inode_ac); 2517 if (status < 0) { 2518 if (status != -ENOSPC) 2519 mlog_errno(status); 2520 goto leave; 2521 } 2522 2523 inode = ocfs2_get_init_inode(dir, mode); 2524 if (IS_ERR(inode)) { 2525 status = PTR_ERR(inode); 2526 inode = NULL; 2527 mlog_errno(status); 2528 goto leave; 2529 } 2530 2531 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); 2532 if (IS_ERR(handle)) { 2533 status = PTR_ERR(handle); 2534 handle = NULL; 2535 mlog_errno(status); 2536 goto leave; 2537 } 2538 2539 status = dquot_alloc_inode(inode); 2540 if (status) 2541 goto leave; 2542 did_quota_inode = 1; 2543 2544 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, 2545 &suballoc_loc, 2546 &suballoc_bit, di_blkno); 2547 if (status < 0) { 2548 mlog_errno(status); 2549 goto leave; 2550 } 2551 2552 clear_nlink(inode); 2553 /* do the real work now. */ 2554 status = __ocfs2_mknod_locked(dir, inode, 2555 0, &new_di_bh, parent_di_bh, handle, 2556 inode_ac, di_blkno, suballoc_loc, 2557 suballoc_bit); 2558 if (status < 0) { 2559 mlog_errno(status); 2560 goto leave; 2561 } 2562 2563 di = (struct ocfs2_dinode *)new_di_bh->b_data; 2564 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, 2565 &orphan_insert, orphan_dir, false); 2566 if (status < 0) { 2567 mlog_errno(status); 2568 goto leave; 2569 } 2570 2571 /* get open lock so that only nodes can't remove it from orphan dir. */ 2572 status = ocfs2_open_lock(inode); 2573 if (status < 0) 2574 mlog_errno(status); 2575 2576 insert_inode_hash(inode); 2577leave: 2578 if (status < 0 && did_quota_inode) 2579 dquot_free_inode(inode); 2580 if (handle) 2581 ocfs2_commit_trans(osb, handle); 2582 2583 if (orphan_dir) { 2584 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 2585 ocfs2_inode_unlock(orphan_dir, 1); 2586 mutex_unlock(&orphan_dir->i_mutex); 2587 iput(orphan_dir); 2588 } 2589 2590 if ((status < 0) && inode) { 2591 clear_nlink(inode); 2592 iput(inode); 2593 } 2594 2595 if (inode_ac) 2596 ocfs2_free_alloc_context(inode_ac); 2597 2598 brelse(new_di_bh); 2599 2600 if (!status) 2601 *new_inode = inode; 2602 2603 ocfs2_free_dir_lookup_result(&orphan_insert); 2604 2605 ocfs2_inode_unlock(dir, 1); 2606 brelse(parent_di_bh); 2607 return status; 2608} 2609 2610int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, 2611 struct inode *inode) 2612{ 2613 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; 2614 struct inode *orphan_dir_inode = NULL; 2615 struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; 2616 struct buffer_head *di_bh = NULL; 2617 int status = 0; 2618 handle_t *handle = NULL; 2619 struct ocfs2_dinode *di = NULL; 2620 2621 status = ocfs2_inode_lock(inode, &di_bh, 1); 2622 if (status < 0) { 2623 mlog_errno(status); 2624 goto bail; 2625 } 2626 2627 di = (struct ocfs2_dinode *) di_bh->b_data; 2628 /* 2629 * Another append dio crashed? 2630 * If so, manually recover it first. 2631 */ 2632 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { 2633 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); 2634 if (status < 0) { 2635 if (status != -ENOSPC) 2636 mlog_errno(status); 2637 goto bail_unlock_inode; 2638 } 2639 2640 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); 2641 if (status < 0) { 2642 mlog_errno(status); 2643 goto bail_unlock_inode; 2644 } 2645 } 2646 2647 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, 2648 OCFS2_I(inode)->ip_blkno, 2649 orphan_name, 2650 &orphan_insert, 2651 true); 2652 if (status < 0) { 2653 mlog_errno(status); 2654 goto bail_unlock_inode; 2655 } 2656 2657 handle = ocfs2_start_trans(osb, 2658 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); 2659 if (IS_ERR(handle)) { 2660 status = PTR_ERR(handle); 2661 goto bail_unlock_orphan; 2662 } 2663 2664 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, 2665 &orphan_insert, orphan_dir_inode, true); 2666 if (status) 2667 mlog_errno(status); 2668 2669 ocfs2_commit_trans(osb, handle); 2670 2671bail_unlock_orphan: 2672 ocfs2_inode_unlock(orphan_dir_inode, 1); 2673 mutex_unlock(&orphan_dir_inode->i_mutex); 2674 iput(orphan_dir_inode); 2675 2676 ocfs2_free_dir_lookup_result(&orphan_insert); 2677 2678bail_unlock_inode: 2679 ocfs2_inode_unlock(inode, 1); 2680 brelse(di_bh); 2681 2682bail: 2683 return status; 2684} 2685 2686int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, 2687 struct inode *inode, struct buffer_head *di_bh, 2688 int update_isize, loff_t end) 2689{ 2690 struct inode *orphan_dir_inode = NULL; 2691 struct buffer_head *orphan_dir_bh = NULL; 2692 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; 2693 handle_t *handle = NULL; 2694 int status = 0; 2695 2696 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2697 ORPHAN_DIR_SYSTEM_INODE, 2698 le16_to_cpu(di->i_dio_orphaned_slot)); 2699 if (!orphan_dir_inode) { 2700 status = -ENOENT; 2701 mlog_errno(status); 2702 goto bail; 2703 } 2704 2705 mutex_lock(&orphan_dir_inode->i_mutex); 2706 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2707 if (status < 0) { 2708 mutex_unlock(&orphan_dir_inode->i_mutex); 2709 iput(orphan_dir_inode); 2710 mlog_errno(status); 2711 goto bail; 2712 } 2713 2714 handle = ocfs2_start_trans(osb, 2715 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); 2716 if (IS_ERR(handle)) { 2717 status = PTR_ERR(handle); 2718 goto bail_unlock_orphan; 2719 } 2720 2721 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); 2722 2723 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, 2724 inode, orphan_dir_bh, true); 2725 if (status < 0) { 2726 mlog_errno(status); 2727 goto bail_commit; 2728 } 2729 2730 status = ocfs2_journal_access_di(handle, 2731 INODE_CACHE(inode), 2732 di_bh, 2733 OCFS2_JOURNAL_ACCESS_WRITE); 2734 if (status < 0) { 2735 mlog_errno(status); 2736 goto bail_commit; 2737 } 2738 2739 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); 2740 di->i_dio_orphaned_slot = 0; 2741 2742 if (update_isize) { 2743 status = ocfs2_set_inode_size(handle, inode, di_bh, end); 2744 if (status) 2745 mlog_errno(status); 2746 } else 2747 ocfs2_journal_dirty(handle, di_bh); 2748 2749bail_commit: 2750 ocfs2_commit_trans(osb, handle); 2751 2752bail_unlock_orphan: 2753 ocfs2_inode_unlock(orphan_dir_inode, 1); 2754 mutex_unlock(&orphan_dir_inode->i_mutex); 2755 brelse(orphan_dir_bh); 2756 iput(orphan_dir_inode); 2757 2758bail: 2759 return status; 2760} 2761 2762int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, 2763 struct inode *inode, 2764 struct dentry *dentry) 2765{ 2766 int status = 0; 2767 struct buffer_head *parent_di_bh = NULL; 2768 handle_t *handle = NULL; 2769 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 2770 struct ocfs2_dinode *dir_di, *di; 2771 struct inode *orphan_dir_inode = NULL; 2772 struct buffer_head *orphan_dir_bh = NULL; 2773 struct buffer_head *di_bh = NULL; 2774 struct ocfs2_dir_lookup_result lookup = { NULL, }; 2775 2776 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, 2777 dentry->d_name.len, dentry->d_name.name, 2778 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2779 (unsigned long long)OCFS2_I(inode)->ip_blkno); 2780 2781 status = ocfs2_inode_lock(dir, &parent_di_bh, 1); 2782 if (status < 0) { 2783 if (status != -ENOENT) 2784 mlog_errno(status); 2785 return status; 2786 } 2787 2788 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; 2789 if (!dir_di->i_links_count) { 2790 /* can't make a file in a deleted directory. */ 2791 status = -ENOENT; 2792 goto leave; 2793 } 2794 2795 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 2796 dentry->d_name.len); 2797 if (status) 2798 goto leave; 2799 2800 /* get a spot inside the dir. */ 2801 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, 2802 dentry->d_name.name, 2803 dentry->d_name.len, &lookup); 2804 if (status < 0) { 2805 mlog_errno(status); 2806 goto leave; 2807 } 2808 2809 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2810 ORPHAN_DIR_SYSTEM_INODE, 2811 osb->slot_num); 2812 if (!orphan_dir_inode) { 2813 status = -ENOENT; 2814 mlog_errno(status); 2815 goto leave; 2816 } 2817 2818 mutex_lock(&orphan_dir_inode->i_mutex); 2819 2820 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2821 if (status < 0) { 2822 mlog_errno(status); 2823 mutex_unlock(&orphan_dir_inode->i_mutex); 2824 iput(orphan_dir_inode); 2825 goto leave; 2826 } 2827 2828 status = ocfs2_read_inode_block(inode, &di_bh); 2829 if (status < 0) { 2830 mlog_errno(status); 2831 goto orphan_unlock; 2832 } 2833 2834 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); 2835 if (IS_ERR(handle)) { 2836 status = PTR_ERR(handle); 2837 handle = NULL; 2838 mlog_errno(status); 2839 goto orphan_unlock; 2840 } 2841 2842 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), 2843 di_bh, OCFS2_JOURNAL_ACCESS_WRITE); 2844 if (status < 0) { 2845 mlog_errno(status); 2846 goto out_commit; 2847 } 2848 2849 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, 2850 orphan_dir_bh, false); 2851 if (status < 0) { 2852 mlog_errno(status); 2853 goto out_commit; 2854 } 2855 2856 di = (struct ocfs2_dinode *)di_bh->b_data; 2857 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); 2858 di->i_orphaned_slot = 0; 2859 set_nlink(inode, 1); 2860 ocfs2_set_links_count(di, inode->i_nlink); 2861 ocfs2_update_inode_fsync_trans(handle, inode, 1); 2862 ocfs2_journal_dirty(handle, di_bh); 2863 2864 status = ocfs2_add_entry(handle, dentry, inode, 2865 OCFS2_I(inode)->ip_blkno, parent_di_bh, 2866 &lookup); 2867 if (status < 0) { 2868 mlog_errno(status); 2869 goto out_commit; 2870 } 2871 2872 status = ocfs2_dentry_attach_lock(dentry, inode, 2873 OCFS2_I(dir)->ip_blkno); 2874 if (status) { 2875 mlog_errno(status); 2876 goto out_commit; 2877 } 2878 2879 d_instantiate(dentry, inode); 2880 status = 0; 2881out_commit: 2882 ocfs2_commit_trans(osb, handle); 2883orphan_unlock: 2884 ocfs2_inode_unlock(orphan_dir_inode, 1); 2885 mutex_unlock(&orphan_dir_inode->i_mutex); 2886 iput(orphan_dir_inode); 2887leave: 2888 2889 ocfs2_inode_unlock(dir, 1); 2890 2891 brelse(di_bh); 2892 brelse(parent_di_bh); 2893 brelse(orphan_dir_bh); 2894 2895 ocfs2_free_dir_lookup_result(&lookup); 2896 2897 if (status) 2898 mlog_errno(status); 2899 2900 return status; 2901} 2902 2903const struct inode_operations ocfs2_dir_iops = { 2904 .create = ocfs2_create, 2905 .lookup = ocfs2_lookup, 2906 .link = ocfs2_link, 2907 .unlink = ocfs2_unlink, 2908 .rmdir = ocfs2_unlink, 2909 .symlink = ocfs2_symlink, 2910 .mkdir = ocfs2_mkdir, 2911 .mknod = ocfs2_mknod, 2912 .rename = ocfs2_rename, 2913 .setattr = ocfs2_setattr, 2914 .getattr = ocfs2_getattr, 2915 .permission = ocfs2_permission, 2916 .setxattr = generic_setxattr, 2917 .getxattr = generic_getxattr, 2918 .listxattr = ocfs2_listxattr, 2919 .removexattr = generic_removexattr, 2920 .fiemap = ocfs2_fiemap, 2921 .get_acl = ocfs2_iop_get_acl, 2922 .set_acl = ocfs2_iop_set_acl, 2923}; 2924