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 44 #define MLOG_MASK_PREFIX ML_NAMEI 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 "vote.h" 64 65 #include "buffer_head_io.h" 66 67 #define NAMEI_RA_CHUNKS 2 68 #define NAMEI_RA_BLOCKS 4 69 #define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS) 70 #define NAMEI_RA_INDEX(c,b) (((c) * NAMEI_RA_BLOCKS) + (b)) 71 72 static int inline ocfs2_search_dirblock(struct buffer_head *bh, 73 struct inode *dir, 74 const char *name, int namelen, 75 unsigned long offset, 76 struct ocfs2_dir_entry **res_dir); 77 78 static int ocfs2_delete_entry(handle_t *handle, 79 struct inode *dir, 80 struct ocfs2_dir_entry *de_del, 81 struct buffer_head *bh); 82 83 static int __ocfs2_add_entry(handle_t *handle, 84 struct inode *dir, 85 const char *name, int namelen, 86 struct inode *inode, u64 blkno, 87 struct buffer_head *parent_fe_bh, 88 struct buffer_head *insert_bh); 89 90 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 91 struct inode *dir, 92 struct dentry *dentry, int mode, 93 dev_t dev, 94 struct buffer_head **new_fe_bh, 95 struct buffer_head *parent_fe_bh, 96 handle_t *handle, 97 struct inode **ret_inode, 98 struct ocfs2_alloc_context *inode_ac); 99 100 static int ocfs2_fill_new_dir(struct ocfs2_super *osb, 101 handle_t *handle, 102 struct inode *parent, 103 struct inode *inode, 104 struct buffer_head *fe_bh, 105 struct ocfs2_alloc_context *data_ac); 106 107 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 108 struct inode **ret_orphan_dir, 109 struct inode *inode, 110 char *name, 111 struct buffer_head **de_bh); 112 113 static int ocfs2_orphan_add(struct ocfs2_super *osb, 114 handle_t *handle, 115 struct inode *inode, 116 struct ocfs2_dinode *fe, 117 char *name, 118 struct buffer_head *de_bh, 119 struct inode *orphan_dir_inode); 120 121 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 122 handle_t *handle, 123 struct inode *inode, 124 const char *symname); 125 126 static inline int ocfs2_add_entry(handle_t *handle, 127 struct dentry *dentry, 128 struct inode *inode, u64 blkno, 129 struct buffer_head *parent_fe_bh, 130 struct buffer_head *insert_bh) 131 { 132 return __ocfs2_add_entry(handle, dentry->d_parent->d_inode, 133 dentry->d_name.name, dentry->d_name.len, 134 inode, blkno, parent_fe_bh, insert_bh); 135 } 136 137 /* An orphan dir name is an 8 byte value, printed as a hex string */ 138 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) 139 140 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, 141 struct nameidata *nd) 142 { 143 int status; 144 u64 blkno; 145 struct buffer_head *dirent_bh = NULL; 146 struct inode *inode = NULL; 147 struct dentry *ret; 148 struct ocfs2_dir_entry *dirent; 149 struct ocfs2_inode_info *oi; 150 151 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, 152 dentry->d_name.len, dentry->d_name.name); 153 154 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { 155 ret = ERR_PTR(-ENAMETOOLONG); 156 goto bail; 157 } 158 159 mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len, 160 dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno); 161 162 status = ocfs2_meta_lock(dir, NULL, 0); 163 if (status < 0) { 164 if (status != -ENOENT) 165 mlog_errno(status); 166 ret = ERR_PTR(status); 167 goto bail; 168 } 169 170 status = ocfs2_find_files_on_disk(dentry->d_name.name, 171 dentry->d_name.len, &blkno, 172 dir, &dirent_bh, &dirent); 173 if (status < 0) 174 goto bail_add; 175 176 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0); 177 if (IS_ERR(inode)) { 178 ret = ERR_PTR(-EACCES); 179 goto bail_unlock; 180 } 181 182 oi = OCFS2_I(inode); 183 /* Clear any orphaned state... If we were able to look up the 184 * inode from a directory, it certainly can't be orphaned. We 185 * might have the bad state from a node which intended to 186 * orphan this inode but crashed before it could commit the 187 * unlink. */ 188 spin_lock(&oi->ip_lock); 189 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 190 spin_unlock(&oi->ip_lock); 191 192 bail_add: 193 dentry->d_op = &ocfs2_dentry_ops; 194 ret = d_splice_alias(inode, dentry); 195 196 if (inode) { 197 /* 198 * If d_splice_alias() finds a DCACHE_DISCONNECTED 199 * dentry, it will d_move() it on top of ourse. The 200 * return value will indicate this however, so in 201 * those cases, we switch them around for the locking 202 * code. 203 * 204 * NOTE: This dentry already has ->d_op set from 205 * ocfs2_get_parent() and ocfs2_get_dentry() 206 */ 207 if (ret) 208 dentry = ret; 209 210 status = ocfs2_dentry_attach_lock(dentry, inode, 211 OCFS2_I(dir)->ip_blkno); 212 if (status) { 213 mlog_errno(status); 214 ret = ERR_PTR(status); 215 goto bail_unlock; 216 } 217 } 218 219 bail_unlock: 220 /* Don't drop the cluster lock until *after* the d_add -- 221 * unlink on another node will message us to remove that 222 * dentry under this lock so otherwise we can race this with 223 * the vote thread and have a stale dentry. */ 224 ocfs2_meta_unlock(dir, 0); 225 226 bail: 227 if (dirent_bh) 228 brelse(dirent_bh); 229 230 mlog_exit_ptr(ret); 231 232 return ret; 233 } 234 235 static int ocfs2_fill_new_dir(struct ocfs2_super *osb, 236 handle_t *handle, 237 struct inode *parent, 238 struct inode *inode, 239 struct buffer_head *fe_bh, 240 struct ocfs2_alloc_context *data_ac) 241 { 242 int status; 243 struct buffer_head *new_bh = NULL; 244 struct ocfs2_dir_entry *de = NULL; 245 246 mlog_entry_void(); 247 248 status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh, 249 data_ac, NULL, &new_bh); 250 if (status < 0) { 251 mlog_errno(status); 252 goto bail; 253 } 254 255 ocfs2_set_new_buffer_uptodate(inode, new_bh); 256 257 status = ocfs2_journal_access(handle, inode, new_bh, 258 OCFS2_JOURNAL_ACCESS_CREATE); 259 if (status < 0) { 260 mlog_errno(status); 261 goto bail; 262 } 263 memset(new_bh->b_data, 0, osb->sb->s_blocksize); 264 265 de = (struct ocfs2_dir_entry *) new_bh->b_data; 266 de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno); 267 de->name_len = 1; 268 de->rec_len = 269 cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); 270 strcpy(de->name, "."); 271 ocfs2_set_de_type(de, S_IFDIR); 272 de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len)); 273 de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno); 274 de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize - 275 OCFS2_DIR_REC_LEN(1)); 276 de->name_len = 2; 277 strcpy(de->name, ".."); 278 ocfs2_set_de_type(de, S_IFDIR); 279 280 status = ocfs2_journal_dirty(handle, new_bh); 281 if (status < 0) { 282 mlog_errno(status); 283 goto bail; 284 } 285 286 i_size_write(inode, inode->i_sb->s_blocksize); 287 inode->i_nlink = 2; 288 inode->i_blocks = ocfs2_inode_sector_count(inode); 289 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); 290 if (status < 0) { 291 mlog_errno(status); 292 goto bail; 293 } 294 295 status = 0; 296 bail: 297 if (new_bh) 298 brelse(new_bh); 299 300 mlog_exit(status); 301 return status; 302 } 303 304 static int ocfs2_mknod(struct inode *dir, 305 struct dentry *dentry, 306 int mode, 307 dev_t dev) 308 { 309 int status = 0; 310 struct buffer_head *parent_fe_bh = NULL; 311 handle_t *handle = NULL; 312 struct ocfs2_super *osb; 313 struct ocfs2_dinode *dirfe; 314 struct buffer_head *new_fe_bh = NULL; 315 struct buffer_head *de_bh = NULL; 316 struct inode *inode = NULL; 317 struct ocfs2_alloc_context *inode_ac = NULL; 318 struct ocfs2_alloc_context *data_ac = NULL; 319 320 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, 321 (unsigned long)dev, dentry->d_name.len, 322 dentry->d_name.name); 323 324 /* get our super block */ 325 osb = OCFS2_SB(dir->i_sb); 326 327 status = ocfs2_meta_lock(dir, &parent_fe_bh, 1); 328 if (status < 0) { 329 if (status != -ENOENT) 330 mlog_errno(status); 331 return status; 332 } 333 334 if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) { 335 status = -EMLINK; 336 goto leave; 337 } 338 339 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 340 if (!dirfe->i_links_count) { 341 /* can't make a file in a deleted directory. */ 342 status = -ENOENT; 343 goto leave; 344 } 345 346 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 347 dentry->d_name.len); 348 if (status) 349 goto leave; 350 351 /* get a spot inside the dir. */ 352 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 353 dentry->d_name.name, 354 dentry->d_name.len, &de_bh); 355 if (status < 0) { 356 mlog_errno(status); 357 goto leave; 358 } 359 360 /* reserve an inode spot */ 361 status = ocfs2_reserve_new_inode(osb, &inode_ac); 362 if (status < 0) { 363 if (status != -ENOSPC) 364 mlog_errno(status); 365 goto leave; 366 } 367 368 /* are we making a directory? If so, reserve a cluster for his 369 * 1st extent. */ 370 if (S_ISDIR(mode)) { 371 status = ocfs2_reserve_clusters(osb, 1, &data_ac); 372 if (status < 0) { 373 if (status != -ENOSPC) 374 mlog_errno(status); 375 goto leave; 376 } 377 } 378 379 handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS); 380 if (IS_ERR(handle)) { 381 status = PTR_ERR(handle); 382 handle = NULL; 383 mlog_errno(status); 384 goto leave; 385 } 386 387 /* do the real work now. */ 388 status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, 389 &new_fe_bh, parent_fe_bh, handle, 390 &inode, inode_ac); 391 if (status < 0) { 392 mlog_errno(status); 393 goto leave; 394 } 395 396 if (S_ISDIR(mode)) { 397 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 398 new_fe_bh, data_ac); 399 if (status < 0) { 400 mlog_errno(status); 401 goto leave; 402 } 403 404 status = ocfs2_journal_access(handle, dir, parent_fe_bh, 405 OCFS2_JOURNAL_ACCESS_WRITE); 406 if (status < 0) { 407 mlog_errno(status); 408 goto leave; 409 } 410 le16_add_cpu(&dirfe->i_links_count, 1); 411 status = ocfs2_journal_dirty(handle, parent_fe_bh); 412 if (status < 0) { 413 mlog_errno(status); 414 goto leave; 415 } 416 inc_nlink(dir); 417 } 418 419 status = ocfs2_add_entry(handle, dentry, inode, 420 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 421 de_bh); 422 if (status < 0) { 423 mlog_errno(status); 424 goto leave; 425 } 426 427 status = ocfs2_dentry_attach_lock(dentry, inode, 428 OCFS2_I(dir)->ip_blkno); 429 if (status) { 430 mlog_errno(status); 431 goto leave; 432 } 433 434 insert_inode_hash(inode); 435 dentry->d_op = &ocfs2_dentry_ops; 436 d_instantiate(dentry, inode); 437 status = 0; 438 leave: 439 if (handle) 440 ocfs2_commit_trans(osb, handle); 441 442 ocfs2_meta_unlock(dir, 1); 443 444 if (status == -ENOSPC) 445 mlog(0, "Disk is full\n"); 446 447 if (new_fe_bh) 448 brelse(new_fe_bh); 449 450 if (de_bh) 451 brelse(de_bh); 452 453 if (parent_fe_bh) 454 brelse(parent_fe_bh); 455 456 if ((status < 0) && inode) 457 iput(inode); 458 459 if (inode_ac) 460 ocfs2_free_alloc_context(inode_ac); 461 462 if (data_ac) 463 ocfs2_free_alloc_context(data_ac); 464 465 mlog_exit(status); 466 467 return status; 468 } 469 470 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 471 struct inode *dir, 472 struct dentry *dentry, int mode, 473 dev_t dev, 474 struct buffer_head **new_fe_bh, 475 struct buffer_head *parent_fe_bh, 476 handle_t *handle, 477 struct inode **ret_inode, 478 struct ocfs2_alloc_context *inode_ac) 479 { 480 int status = 0; 481 struct ocfs2_dinode *fe = NULL; 482 struct ocfs2_extent_list *fel; 483 u64 fe_blkno = 0; 484 u16 suballoc_bit; 485 struct inode *inode = NULL; 486 487 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, 488 (unsigned long)dev, dentry->d_name.len, 489 dentry->d_name.name); 490 491 *new_fe_bh = NULL; 492 *ret_inode = NULL; 493 494 status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, 495 &fe_blkno); 496 if (status < 0) { 497 mlog_errno(status); 498 goto leave; 499 } 500 501 inode = new_inode(dir->i_sb); 502 if (IS_ERR(inode)) { 503 status = PTR_ERR(inode); 504 mlog(ML_ERROR, "new_inode failed!\n"); 505 goto leave; 506 } 507 508 /* populate as many fields early on as possible - many of 509 * these are used by the support functions here and in 510 * callers. */ 511 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 512 OCFS2_I(inode)->ip_blkno = fe_blkno; 513 if (S_ISDIR(mode)) 514 inode->i_nlink = 2; 515 else 516 inode->i_nlink = 1; 517 inode->i_mode = mode; 518 spin_lock(&osb->osb_lock); 519 inode->i_generation = osb->s_next_generation++; 520 spin_unlock(&osb->osb_lock); 521 522 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 523 if (!*new_fe_bh) { 524 status = -EIO; 525 mlog_errno(status); 526 goto leave; 527 } 528 ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); 529 530 status = ocfs2_journal_access(handle, inode, *new_fe_bh, 531 OCFS2_JOURNAL_ACCESS_CREATE); 532 if (status < 0) { 533 mlog_errno(status); 534 goto leave; 535 } 536 537 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 538 memset(fe, 0, osb->sb->s_blocksize); 539 540 fe->i_generation = cpu_to_le32(inode->i_generation); 541 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 542 fe->i_blkno = cpu_to_le64(fe_blkno); 543 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 544 fe->i_suballoc_slot = cpu_to_le16(osb->slot_num); 545 fe->i_uid = cpu_to_le32(current->fsuid); 546 if (dir->i_mode & S_ISGID) { 547 fe->i_gid = cpu_to_le32(dir->i_gid); 548 if (S_ISDIR(mode)) 549 mode |= S_ISGID; 550 } else 551 fe->i_gid = cpu_to_le32(current->fsgid); 552 fe->i_mode = cpu_to_le16(mode); 553 if (S_ISCHR(mode) || S_ISBLK(mode)) 554 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 555 556 fe->i_links_count = cpu_to_le16(inode->i_nlink); 557 558 fe->i_last_eb_blk = 0; 559 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 560 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); 561 fe->i_atime = fe->i_ctime = fe->i_mtime = 562 cpu_to_le64(CURRENT_TIME.tv_sec); 563 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 564 cpu_to_le32(CURRENT_TIME.tv_nsec); 565 fe->i_dtime = 0; 566 567 fel = &fe->id2.i_list; 568 fel->l_tree_depth = 0; 569 fel->l_next_free_rec = 0; 570 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 571 572 status = ocfs2_journal_dirty(handle, *new_fe_bh); 573 if (status < 0) { 574 mlog_errno(status); 575 goto leave; 576 } 577 578 if (ocfs2_populate_inode(inode, fe, 1) < 0) { 579 mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, " 580 "i_blkno=%llu, i_ino=%lu\n", 581 (unsigned long long)(*new_fe_bh)->b_blocknr, 582 (unsigned long long)le64_to_cpu(fe->i_blkno), 583 inode->i_ino); 584 BUG(); 585 } 586 587 ocfs2_inode_set_new(osb, inode); 588 if (!ocfs2_mount_local(osb)) { 589 status = ocfs2_create_new_inode_locks(inode); 590 if (status < 0) 591 mlog_errno(status); 592 } 593 594 status = 0; /* error in ocfs2_create_new_inode_locks is not 595 * critical */ 596 597 *ret_inode = inode; 598 leave: 599 if (status < 0) { 600 if (*new_fe_bh) { 601 brelse(*new_fe_bh); 602 *new_fe_bh = NULL; 603 } 604 if (inode) 605 iput(inode); 606 } 607 608 mlog_exit(status); 609 return status; 610 } 611 612 static int ocfs2_mkdir(struct inode *dir, 613 struct dentry *dentry, 614 int mode) 615 { 616 int ret; 617 618 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, 619 dentry->d_name.len, dentry->d_name.name); 620 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); 621 mlog_exit(ret); 622 623 return ret; 624 } 625 626 static int ocfs2_create(struct inode *dir, 627 struct dentry *dentry, 628 int mode, 629 struct nameidata *nd) 630 { 631 int ret; 632 633 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, 634 dentry->d_name.len, dentry->d_name.name); 635 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); 636 mlog_exit(ret); 637 638 return ret; 639 } 640 641 static int ocfs2_link(struct dentry *old_dentry, 642 struct inode *dir, 643 struct dentry *dentry) 644 { 645 handle_t *handle; 646 struct inode *inode = old_dentry->d_inode; 647 int err; 648 struct buffer_head *fe_bh = NULL; 649 struct buffer_head *parent_fe_bh = NULL; 650 struct buffer_head *de_bh = NULL; 651 struct ocfs2_dinode *fe = NULL; 652 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 653 654 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, 655 old_dentry->d_name.len, old_dentry->d_name.name, 656 dentry->d_name.len, dentry->d_name.name); 657 658 if (S_ISDIR(inode->i_mode)) 659 return -EPERM; 660 661 err = ocfs2_meta_lock(dir, &parent_fe_bh, 1); 662 if (err < 0) { 663 if (err != -ENOENT) 664 mlog_errno(err); 665 return err; 666 } 667 668 if (!dir->i_nlink) { 669 err = -ENOENT; 670 goto out; 671 } 672 673 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 674 dentry->d_name.len); 675 if (err) 676 goto out; 677 678 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 679 dentry->d_name.name, 680 dentry->d_name.len, &de_bh); 681 if (err < 0) { 682 mlog_errno(err); 683 goto out; 684 } 685 686 err = ocfs2_meta_lock(inode, &fe_bh, 1); 687 if (err < 0) { 688 if (err != -ENOENT) 689 mlog_errno(err); 690 goto out; 691 } 692 693 fe = (struct ocfs2_dinode *) fe_bh->b_data; 694 if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) { 695 err = -EMLINK; 696 goto out_unlock_inode; 697 } 698 699 handle = ocfs2_start_trans(osb, OCFS2_LINK_CREDITS); 700 if (IS_ERR(handle)) { 701 err = PTR_ERR(handle); 702 handle = NULL; 703 mlog_errno(err); 704 goto out_unlock_inode; 705 } 706 707 err = ocfs2_journal_access(handle, inode, fe_bh, 708 OCFS2_JOURNAL_ACCESS_WRITE); 709 if (err < 0) { 710 mlog_errno(err); 711 goto out_commit; 712 } 713 714 inc_nlink(inode); 715 inode->i_ctime = CURRENT_TIME; 716 fe->i_links_count = cpu_to_le16(inode->i_nlink); 717 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 718 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 719 720 err = ocfs2_journal_dirty(handle, fe_bh); 721 if (err < 0) { 722 le16_add_cpu(&fe->i_links_count, -1); 723 drop_nlink(inode); 724 mlog_errno(err); 725 goto out_commit; 726 } 727 728 err = ocfs2_add_entry(handle, dentry, inode, 729 OCFS2_I(inode)->ip_blkno, 730 parent_fe_bh, de_bh); 731 if (err) { 732 le16_add_cpu(&fe->i_links_count, -1); 733 drop_nlink(inode); 734 mlog_errno(err); 735 goto out_commit; 736 } 737 738 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 739 if (err) { 740 mlog_errno(err); 741 goto out_commit; 742 } 743 744 atomic_inc(&inode->i_count); 745 dentry->d_op = &ocfs2_dentry_ops; 746 d_instantiate(dentry, inode); 747 748 out_commit: 749 ocfs2_commit_trans(osb, handle); 750 out_unlock_inode: 751 ocfs2_meta_unlock(inode, 1); 752 753 out: 754 ocfs2_meta_unlock(dir, 1); 755 756 if (de_bh) 757 brelse(de_bh); 758 if (fe_bh) 759 brelse(fe_bh); 760 if (parent_fe_bh) 761 brelse(parent_fe_bh); 762 763 mlog_exit(err); 764 765 return err; 766 } 767 768 /* 769 * Takes and drops an exclusive lock on the given dentry. This will 770 * force other nodes to drop it. 771 */ 772 static int ocfs2_remote_dentry_delete(struct dentry *dentry) 773 { 774 int ret; 775 776 ret = ocfs2_dentry_lock(dentry, 1); 777 if (ret) 778 mlog_errno(ret); 779 else 780 ocfs2_dentry_unlock(dentry, 1); 781 782 return ret; 783 } 784 785 static inline int inode_is_unlinkable(struct inode *inode) 786 { 787 if (S_ISDIR(inode->i_mode)) { 788 if (inode->i_nlink == 2) 789 return 1; 790 return 0; 791 } 792 793 if (inode->i_nlink == 1) 794 return 1; 795 return 0; 796 } 797 798 static int ocfs2_unlink(struct inode *dir, 799 struct dentry *dentry) 800 { 801 int status; 802 int child_locked = 0; 803 struct inode *inode = dentry->d_inode; 804 struct inode *orphan_dir = NULL; 805 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); 806 u64 blkno; 807 struct ocfs2_dinode *fe = NULL; 808 struct buffer_head *fe_bh = NULL; 809 struct buffer_head *parent_node_bh = NULL; 810 handle_t *handle = NULL; 811 struct ocfs2_dir_entry *dirent = NULL; 812 struct buffer_head *dirent_bh = NULL; 813 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 814 struct buffer_head *orphan_entry_bh = NULL; 815 816 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, 817 dentry->d_name.len, dentry->d_name.name); 818 819 BUG_ON(dentry->d_parent->d_inode != dir); 820 821 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); 822 823 if (inode == osb->root_inode) { 824 mlog(0, "Cannot delete the root directory\n"); 825 return -EPERM; 826 } 827 828 status = ocfs2_meta_lock(dir, &parent_node_bh, 1); 829 if (status < 0) { 830 if (status != -ENOENT) 831 mlog_errno(status); 832 return status; 833 } 834 835 status = ocfs2_find_files_on_disk(dentry->d_name.name, 836 dentry->d_name.len, &blkno, 837 dir, &dirent_bh, &dirent); 838 if (status < 0) { 839 if (status != -ENOENT) 840 mlog_errno(status); 841 goto leave; 842 } 843 844 if (OCFS2_I(inode)->ip_blkno != blkno) { 845 status = -ENOENT; 846 847 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", 848 (unsigned long long)OCFS2_I(inode)->ip_blkno, 849 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags); 850 goto leave; 851 } 852 853 status = ocfs2_meta_lock(inode, &fe_bh, 1); 854 if (status < 0) { 855 if (status != -ENOENT) 856 mlog_errno(status); 857 goto leave; 858 } 859 child_locked = 1; 860 861 if (S_ISDIR(inode->i_mode)) { 862 if (!ocfs2_empty_dir(inode)) { 863 status = -ENOTEMPTY; 864 goto leave; 865 } else if (inode->i_nlink != 2) { 866 status = -ENOTEMPTY; 867 goto leave; 868 } 869 } 870 871 status = ocfs2_remote_dentry_delete(dentry); 872 if (status < 0) { 873 /* This vote should succeed under all normal 874 * circumstances. */ 875 mlog_errno(status); 876 goto leave; 877 } 878 879 if (inode_is_unlinkable(inode)) { 880 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode, 881 orphan_name, 882 &orphan_entry_bh); 883 if (status < 0) { 884 mlog_errno(status); 885 goto leave; 886 } 887 } 888 889 handle = ocfs2_start_trans(osb, OCFS2_UNLINK_CREDITS); 890 if (IS_ERR(handle)) { 891 status = PTR_ERR(handle); 892 handle = NULL; 893 mlog_errno(status); 894 goto leave; 895 } 896 897 status = ocfs2_journal_access(handle, inode, fe_bh, 898 OCFS2_JOURNAL_ACCESS_WRITE); 899 if (status < 0) { 900 mlog_errno(status); 901 goto leave; 902 } 903 904 fe = (struct ocfs2_dinode *) fe_bh->b_data; 905 906 if (inode_is_unlinkable(inode)) { 907 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, 908 orphan_entry_bh, orphan_dir); 909 if (status < 0) { 910 mlog_errno(status); 911 goto leave; 912 } 913 } 914 915 /* delete the name from the parent dir */ 916 status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh); 917 if (status < 0) { 918 mlog_errno(status); 919 goto leave; 920 } 921 922 if (S_ISDIR(inode->i_mode)) 923 drop_nlink(inode); 924 drop_nlink(inode); 925 fe->i_links_count = cpu_to_le16(inode->i_nlink); 926 927 status = ocfs2_journal_dirty(handle, fe_bh); 928 if (status < 0) { 929 mlog_errno(status); 930 goto leave; 931 } 932 933 dir->i_ctime = dir->i_mtime = CURRENT_TIME; 934 if (S_ISDIR(inode->i_mode)) 935 drop_nlink(dir); 936 937 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); 938 if (status < 0) { 939 mlog_errno(status); 940 if (S_ISDIR(inode->i_mode)) 941 inc_nlink(dir); 942 } 943 944 leave: 945 if (handle) 946 ocfs2_commit_trans(osb, handle); 947 948 if (child_locked) 949 ocfs2_meta_unlock(inode, 1); 950 951 ocfs2_meta_unlock(dir, 1); 952 953 if (orphan_dir) { 954 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 955 ocfs2_meta_unlock(orphan_dir, 1); 956 mutex_unlock(&orphan_dir->i_mutex); 957 iput(orphan_dir); 958 } 959 960 if (fe_bh) 961 brelse(fe_bh); 962 963 if (dirent_bh) 964 brelse(dirent_bh); 965 966 if (parent_node_bh) 967 brelse(parent_node_bh); 968 969 if (orphan_entry_bh) 970 brelse(orphan_entry_bh); 971 972 mlog_exit(status); 973 974 return status; 975 } 976 977 /* 978 * The only place this should be used is rename! 979 * if they have the same id, then the 1st one is the only one locked. 980 */ 981 static int ocfs2_double_lock(struct ocfs2_super *osb, 982 struct buffer_head **bh1, 983 struct inode *inode1, 984 struct buffer_head **bh2, 985 struct inode *inode2) 986 { 987 int status; 988 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 989 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 990 struct buffer_head **tmpbh; 991 struct inode *tmpinode; 992 993 mlog_entry("(inode1 = %llu, inode2 = %llu)\n", 994 (unsigned long long)oi1->ip_blkno, 995 (unsigned long long)oi2->ip_blkno); 996 997 if (*bh1) 998 *bh1 = NULL; 999 if (*bh2) 1000 *bh2 = NULL; 1001 1002 /* we always want to lock the one with the lower lockid first. */ 1003 if (oi1->ip_blkno != oi2->ip_blkno) { 1004 if (oi1->ip_blkno < oi2->ip_blkno) { 1005 /* switch id1 and id2 around */ 1006 mlog(0, "switching them around...\n"); 1007 tmpbh = bh2; 1008 bh2 = bh1; 1009 bh1 = tmpbh; 1010 1011 tmpinode = inode2; 1012 inode2 = inode1; 1013 inode1 = tmpinode; 1014 } 1015 /* lock id2 */ 1016 status = ocfs2_meta_lock(inode2, bh2, 1); 1017 if (status < 0) { 1018 if (status != -ENOENT) 1019 mlog_errno(status); 1020 goto bail; 1021 } 1022 } 1023 1024 /* lock id1 */ 1025 status = ocfs2_meta_lock(inode1, bh1, 1); 1026 if (status < 0) { 1027 /* 1028 * An error return must mean that no cluster locks 1029 * were held on function exit. 1030 */ 1031 if (oi1->ip_blkno != oi2->ip_blkno) 1032 ocfs2_meta_unlock(inode2, 1); 1033 1034 if (status != -ENOENT) 1035 mlog_errno(status); 1036 } 1037 1038 bail: 1039 mlog_exit(status); 1040 return status; 1041 } 1042 1043 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1044 { 1045 ocfs2_meta_unlock(inode1, 1); 1046 1047 if (inode1 != inode2) 1048 ocfs2_meta_unlock(inode2, 1); 1049 } 1050 1051 #define PARENT_INO(buffer) \ 1052 ((struct ocfs2_dir_entry *) \ 1053 ((char *)buffer + \ 1054 le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode 1055 1056 static int ocfs2_rename(struct inode *old_dir, 1057 struct dentry *old_dentry, 1058 struct inode *new_dir, 1059 struct dentry *new_dentry) 1060 { 1061 int status = 0, rename_lock = 0, parents_locked = 0; 1062 int old_child_locked = 0, new_child_locked = 0; 1063 struct inode *old_inode = old_dentry->d_inode; 1064 struct inode *new_inode = new_dentry->d_inode; 1065 struct inode *orphan_dir = NULL; 1066 struct ocfs2_dinode *newfe = NULL; 1067 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1068 struct buffer_head *orphan_entry_bh = NULL; 1069 struct buffer_head *newfe_bh = NULL; 1070 struct buffer_head *old_inode_bh = NULL; 1071 struct buffer_head *insert_entry_bh = NULL; 1072 struct ocfs2_super *osb = NULL; 1073 u64 newfe_blkno; 1074 handle_t *handle = NULL; 1075 struct buffer_head *old_dir_bh = NULL; 1076 struct buffer_head *new_dir_bh = NULL; 1077 struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry 1078 // and new_dentry 1079 struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above 1080 struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, 1081 // this is the 1st dirent bh 1082 nlink_t old_dir_nlink = old_dir->i_nlink; 1083 1084 /* At some point it might be nice to break this function up a 1085 * bit. */ 1086 1087 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", 1088 old_dir, old_dentry, new_dir, new_dentry, 1089 old_dentry->d_name.len, old_dentry->d_name.name, 1090 new_dentry->d_name.len, new_dentry->d_name.name); 1091 1092 osb = OCFS2_SB(old_dir->i_sb); 1093 1094 if (new_inode) { 1095 if (!igrab(new_inode)) 1096 BUG(); 1097 } 1098 1099 /* Assume a directory hierarchy thusly: 1100 * a/b/c 1101 * a/d 1102 * a,b,c, and d are all directories. 1103 * 1104 * from cwd of 'a' on both nodes: 1105 * node1: mv b/c d 1106 * node2: mv d b/c 1107 * 1108 * And that's why, just like the VFS, we need a file system 1109 * rename lock. */ 1110 if (old_dentry != new_dentry) { 1111 status = ocfs2_rename_lock(osb); 1112 if (status < 0) { 1113 mlog_errno(status); 1114 goto bail; 1115 } 1116 rename_lock = 1; 1117 } 1118 1119 /* if old and new are the same, this'll just do one lock. */ 1120 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1121 &new_dir_bh, new_dir); 1122 if (status < 0) { 1123 mlog_errno(status); 1124 goto bail; 1125 } 1126 parents_locked = 1; 1127 1128 /* make sure both dirs have bhs 1129 * get an extra ref on old_dir_bh if old==new */ 1130 if (!new_dir_bh) { 1131 if (old_dir_bh) { 1132 new_dir_bh = old_dir_bh; 1133 get_bh(new_dir_bh); 1134 } else { 1135 mlog(ML_ERROR, "no old_dir_bh!\n"); 1136 status = -EIO; 1137 goto bail; 1138 } 1139 } 1140 1141 /* 1142 * Aside from allowing a meta data update, the locking here 1143 * also ensures that the vote thread on other nodes won't have 1144 * to concurrently downconvert the inode and the dentry locks. 1145 */ 1146 status = ocfs2_meta_lock(old_inode, &old_inode_bh, 1); 1147 if (status < 0) { 1148 if (status != -ENOENT) 1149 mlog_errno(status); 1150 goto bail; 1151 } 1152 old_child_locked = 1; 1153 1154 status = ocfs2_remote_dentry_delete(old_dentry); 1155 if (status < 0) { 1156 mlog_errno(status); 1157 goto bail; 1158 } 1159 1160 if (S_ISDIR(old_inode->i_mode)) { 1161 status = -EIO; 1162 old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0); 1163 if (!old_inode_de_bh) 1164 goto bail; 1165 1166 status = -EIO; 1167 if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) != 1168 OCFS2_I(old_dir)->ip_blkno) 1169 goto bail; 1170 status = -EMLINK; 1171 if (!new_inode && new_dir!=old_dir && 1172 new_dir->i_nlink >= OCFS2_LINK_MAX) 1173 goto bail; 1174 } 1175 1176 status = -ENOENT; 1177 old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, 1178 old_dentry->d_name.len, 1179 old_dir, &old_de); 1180 if (!old_de_bh) 1181 goto bail; 1182 1183 /* 1184 * Check for inode number is _not_ due to possible IO errors. 1185 * We might rmdir the source, keep it as pwd of some process 1186 * and merrily kill the link to whatever was created under the 1187 * same name. Goodbye sticky bit ;-< 1188 */ 1189 if (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno) 1190 goto bail; 1191 1192 /* check if the target already exists (in which case we need 1193 * to delete it */ 1194 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1195 new_dentry->d_name.len, 1196 &newfe_blkno, new_dir, &new_de_bh, 1197 &new_de); 1198 /* The only error we allow here is -ENOENT because the new 1199 * file not existing is perfectly valid. */ 1200 if ((status < 0) && (status != -ENOENT)) { 1201 /* If we cannot find the file specified we should just */ 1202 /* return the error... */ 1203 mlog_errno(status); 1204 goto bail; 1205 } 1206 1207 if (!new_de && new_inode) 1208 mlog(ML_ERROR, "inode %lu does not exist in it's parent " 1209 "directory!", new_inode->i_ino); 1210 1211 /* In case we need to overwrite an existing file, we blow it 1212 * away first */ 1213 if (new_de) { 1214 /* VFS didn't think there existed an inode here, but 1215 * someone else in the cluster must have raced our 1216 * rename to create one. Today we error cleanly, in 1217 * the future we should consider calling iget to build 1218 * a new struct inode for this entry. */ 1219 if (!new_inode) { 1220 status = -EACCES; 1221 1222 mlog(0, "We found an inode for name %.*s but VFS " 1223 "didn't give us one.\n", new_dentry->d_name.len, 1224 new_dentry->d_name.name); 1225 goto bail; 1226 } 1227 1228 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1229 status = -EACCES; 1230 1231 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", 1232 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1233 (unsigned long long)newfe_blkno, 1234 OCFS2_I(new_inode)->ip_flags); 1235 goto bail; 1236 } 1237 1238 status = ocfs2_meta_lock(new_inode, &newfe_bh, 1); 1239 if (status < 0) { 1240 if (status != -ENOENT) 1241 mlog_errno(status); 1242 goto bail; 1243 } 1244 new_child_locked = 1; 1245 1246 status = ocfs2_remote_dentry_delete(new_dentry); 1247 if (status < 0) { 1248 mlog_errno(status); 1249 goto bail; 1250 } 1251 1252 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1253 1254 mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " 1255 "newfebh=%p bhblocknr=%llu\n", new_de, 1256 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1257 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1258 1259 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1260 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1261 new_inode, 1262 orphan_name, 1263 &orphan_entry_bh); 1264 if (status < 0) { 1265 mlog_errno(status); 1266 goto bail; 1267 } 1268 } 1269 } else { 1270 BUG_ON(new_dentry->d_parent->d_inode != new_dir); 1271 1272 status = ocfs2_check_dir_for_entry(new_dir, 1273 new_dentry->d_name.name, 1274 new_dentry->d_name.len); 1275 if (status) 1276 goto bail; 1277 1278 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1279 new_dentry->d_name.name, 1280 new_dentry->d_name.len, 1281 &insert_entry_bh); 1282 if (status < 0) { 1283 mlog_errno(status); 1284 goto bail; 1285 } 1286 } 1287 1288 handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS); 1289 if (IS_ERR(handle)) { 1290 status = PTR_ERR(handle); 1291 handle = NULL; 1292 mlog_errno(status); 1293 goto bail; 1294 } 1295 1296 if (new_de) { 1297 if (S_ISDIR(new_inode->i_mode)) { 1298 if (!ocfs2_empty_dir(new_inode) || 1299 new_inode->i_nlink != 2) { 1300 status = -ENOTEMPTY; 1301 goto bail; 1302 } 1303 } 1304 status = ocfs2_journal_access(handle, new_inode, newfe_bh, 1305 OCFS2_JOURNAL_ACCESS_WRITE); 1306 if (status < 0) { 1307 mlog_errno(status); 1308 goto bail; 1309 } 1310 1311 if (S_ISDIR(new_inode->i_mode) || 1312 (newfe->i_links_count == cpu_to_le16(1))){ 1313 status = ocfs2_orphan_add(osb, handle, new_inode, 1314 newfe, orphan_name, 1315 orphan_entry_bh, orphan_dir); 1316 if (status < 0) { 1317 mlog_errno(status); 1318 goto bail; 1319 } 1320 } 1321 1322 /* change the dirent to point to the correct inode */ 1323 status = ocfs2_journal_access(handle, new_dir, new_de_bh, 1324 OCFS2_JOURNAL_ACCESS_WRITE); 1325 if (status < 0) { 1326 mlog_errno(status); 1327 goto bail; 1328 } 1329 new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno); 1330 new_de->file_type = old_de->file_type; 1331 new_dir->i_version++; 1332 status = ocfs2_journal_dirty(handle, new_de_bh); 1333 if (status < 0) { 1334 mlog_errno(status); 1335 goto bail; 1336 } 1337 1338 if (S_ISDIR(new_inode->i_mode)) 1339 newfe->i_links_count = 0; 1340 else 1341 le16_add_cpu(&newfe->i_links_count, -1); 1342 1343 status = ocfs2_journal_dirty(handle, newfe_bh); 1344 if (status < 0) { 1345 mlog_errno(status); 1346 goto bail; 1347 } 1348 } else { 1349 /* if the name was not found in new_dir, add it now */ 1350 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1351 OCFS2_I(old_inode)->ip_blkno, 1352 new_dir_bh, insert_entry_bh); 1353 } 1354 1355 old_inode->i_ctime = CURRENT_TIME; 1356 mark_inode_dirty(old_inode); 1357 ocfs2_mark_inode_dirty(handle, old_inode, old_inode_bh); 1358 1359 /* now that the name has been added to new_dir, remove the old name */ 1360 status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); 1361 if (status < 0) { 1362 mlog_errno(status); 1363 goto bail; 1364 } 1365 1366 if (new_inode) { 1367 new_inode->i_nlink--; 1368 new_inode->i_ctime = CURRENT_TIME; 1369 } 1370 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; 1371 if (old_inode_de_bh) { 1372 status = ocfs2_journal_access(handle, old_inode, 1373 old_inode_de_bh, 1374 OCFS2_JOURNAL_ACCESS_WRITE); 1375 PARENT_INO(old_inode_de_bh->b_data) = 1376 cpu_to_le64(OCFS2_I(new_dir)->ip_blkno); 1377 status = ocfs2_journal_dirty(handle, old_inode_de_bh); 1378 old_dir->i_nlink--; 1379 if (new_inode) { 1380 new_inode->i_nlink--; 1381 } else { 1382 inc_nlink(new_dir); 1383 mark_inode_dirty(new_dir); 1384 } 1385 } 1386 mark_inode_dirty(old_dir); 1387 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); 1388 if (new_inode) { 1389 mark_inode_dirty(new_inode); 1390 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); 1391 } 1392 1393 if (old_dir != new_dir) { 1394 /* Keep the same times on both directories.*/ 1395 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; 1396 1397 /* 1398 * This will also pick up the i_nlink change from the 1399 * block above. 1400 */ 1401 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); 1402 } 1403 1404 if (old_dir_nlink != old_dir->i_nlink) { 1405 if (!old_dir_bh) { 1406 mlog(ML_ERROR, "need to change nlink for old dir " 1407 "%llu from %d to %d but bh is NULL!\n", 1408 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1409 (int)old_dir_nlink, old_dir->i_nlink); 1410 } else { 1411 struct ocfs2_dinode *fe; 1412 status = ocfs2_journal_access(handle, old_dir, 1413 old_dir_bh, 1414 OCFS2_JOURNAL_ACCESS_WRITE); 1415 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1416 fe->i_links_count = cpu_to_le16(old_dir->i_nlink); 1417 status = ocfs2_journal_dirty(handle, old_dir_bh); 1418 } 1419 } 1420 1421 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1422 status = 0; 1423 bail: 1424 if (rename_lock) 1425 ocfs2_rename_unlock(osb); 1426 1427 if (handle) 1428 ocfs2_commit_trans(osb, handle); 1429 1430 if (parents_locked) 1431 ocfs2_double_unlock(old_dir, new_dir); 1432 1433 if (old_child_locked) 1434 ocfs2_meta_unlock(old_inode, 1); 1435 1436 if (new_child_locked) 1437 ocfs2_meta_unlock(new_inode, 1); 1438 1439 if (orphan_dir) { 1440 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1441 ocfs2_meta_unlock(orphan_dir, 1); 1442 mutex_unlock(&orphan_dir->i_mutex); 1443 iput(orphan_dir); 1444 } 1445 1446 if (new_inode) 1447 sync_mapping_buffers(old_inode->i_mapping); 1448 1449 if (new_inode) 1450 iput(new_inode); 1451 if (newfe_bh) 1452 brelse(newfe_bh); 1453 if (old_inode_bh) 1454 brelse(old_inode_bh); 1455 if (old_dir_bh) 1456 brelse(old_dir_bh); 1457 if (new_dir_bh) 1458 brelse(new_dir_bh); 1459 if (new_de_bh) 1460 brelse(new_de_bh); 1461 if (old_de_bh) 1462 brelse(old_de_bh); 1463 if (old_inode_de_bh) 1464 brelse(old_inode_de_bh); 1465 if (orphan_entry_bh) 1466 brelse(orphan_entry_bh); 1467 if (insert_entry_bh) 1468 brelse(insert_entry_bh); 1469 1470 mlog_exit(status); 1471 1472 return status; 1473 } 1474 1475 /* 1476 * we expect i_size = strlen(symname). Copy symname into the file 1477 * data, including the null terminator. 1478 */ 1479 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1480 handle_t *handle, 1481 struct inode *inode, 1482 const char *symname) 1483 { 1484 struct buffer_head **bhs = NULL; 1485 const char *c; 1486 struct super_block *sb = osb->sb; 1487 u64 p_blkno, p_blocks; 1488 int virtual, blocks, status, i, bytes_left; 1489 1490 bytes_left = i_size_read(inode) + 1; 1491 /* we can't trust i_blocks because we're actually going to 1492 * write i_size + 1 bytes. */ 1493 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1494 1495 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", 1496 (unsigned long long)inode->i_blocks, 1497 i_size_read(inode), blocks); 1498 1499 /* Sanity check -- make sure we're going to fit. */ 1500 if (bytes_left > 1501 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1502 status = -EIO; 1503 mlog_errno(status); 1504 goto bail; 1505 } 1506 1507 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1508 if (!bhs) { 1509 status = -ENOMEM; 1510 mlog_errno(status); 1511 goto bail; 1512 } 1513 1514 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, 1515 NULL); 1516 if (status < 0) { 1517 mlog_errno(status); 1518 goto bail; 1519 } 1520 1521 /* links can never be larger than one cluster so we know this 1522 * is all going to be contiguous, but do a sanity check 1523 * anyway. */ 1524 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1525 status = -EIO; 1526 mlog_errno(status); 1527 goto bail; 1528 } 1529 1530 virtual = 0; 1531 while(bytes_left > 0) { 1532 c = &symname[virtual * sb->s_blocksize]; 1533 1534 bhs[virtual] = sb_getblk(sb, p_blkno); 1535 if (!bhs[virtual]) { 1536 status = -ENOMEM; 1537 mlog_errno(status); 1538 goto bail; 1539 } 1540 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]); 1541 1542 status = ocfs2_journal_access(handle, inode, bhs[virtual], 1543 OCFS2_JOURNAL_ACCESS_CREATE); 1544 if (status < 0) { 1545 mlog_errno(status); 1546 goto bail; 1547 } 1548 1549 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1550 1551 memcpy(bhs[virtual]->b_data, c, 1552 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1553 bytes_left); 1554 1555 status = ocfs2_journal_dirty(handle, bhs[virtual]); 1556 if (status < 0) { 1557 mlog_errno(status); 1558 goto bail; 1559 } 1560 1561 virtual++; 1562 p_blkno++; 1563 bytes_left -= sb->s_blocksize; 1564 } 1565 1566 status = 0; 1567 bail: 1568 1569 if (bhs) { 1570 for(i = 0; i < blocks; i++) 1571 if (bhs[i]) 1572 brelse(bhs[i]); 1573 kfree(bhs); 1574 } 1575 1576 mlog_exit(status); 1577 return status; 1578 } 1579 1580 static int ocfs2_symlink(struct inode *dir, 1581 struct dentry *dentry, 1582 const char *symname) 1583 { 1584 int status, l, credits; 1585 u64 newsize; 1586 struct ocfs2_super *osb = NULL; 1587 struct inode *inode = NULL; 1588 struct super_block *sb; 1589 struct buffer_head *new_fe_bh = NULL; 1590 struct buffer_head *de_bh = NULL; 1591 struct buffer_head *parent_fe_bh = NULL; 1592 struct ocfs2_dinode *fe = NULL; 1593 struct ocfs2_dinode *dirfe; 1594 handle_t *handle = NULL; 1595 struct ocfs2_alloc_context *inode_ac = NULL; 1596 struct ocfs2_alloc_context *data_ac = NULL; 1597 1598 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, 1599 dentry, symname, dentry->d_name.len, dentry->d_name.name); 1600 1601 sb = dir->i_sb; 1602 osb = OCFS2_SB(sb); 1603 1604 l = strlen(symname) + 1; 1605 1606 credits = ocfs2_calc_symlink_credits(sb); 1607 1608 /* lock the parent directory */ 1609 status = ocfs2_meta_lock(dir, &parent_fe_bh, 1); 1610 if (status < 0) { 1611 if (status != -ENOENT) 1612 mlog_errno(status); 1613 return status; 1614 } 1615 1616 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1617 if (!dirfe->i_links_count) { 1618 /* can't make a file in a deleted directory. */ 1619 status = -ENOENT; 1620 goto bail; 1621 } 1622 1623 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1624 dentry->d_name.len); 1625 if (status) 1626 goto bail; 1627 1628 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1629 dentry->d_name.name, 1630 dentry->d_name.len, &de_bh); 1631 if (status < 0) { 1632 mlog_errno(status); 1633 goto bail; 1634 } 1635 1636 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1637 if (status < 0) { 1638 if (status != -ENOSPC) 1639 mlog_errno(status); 1640 goto bail; 1641 } 1642 1643 /* don't reserve bitmap space for fast symlinks. */ 1644 if (l > ocfs2_fast_symlink_chars(sb)) { 1645 status = ocfs2_reserve_clusters(osb, 1, &data_ac); 1646 if (status < 0) { 1647 if (status != -ENOSPC) 1648 mlog_errno(status); 1649 goto bail; 1650 } 1651 } 1652 1653 handle = ocfs2_start_trans(osb, credits); 1654 if (IS_ERR(handle)) { 1655 status = PTR_ERR(handle); 1656 handle = NULL; 1657 mlog_errno(status); 1658 goto bail; 1659 } 1660 1661 status = ocfs2_mknod_locked(osb, dir, dentry, 1662 S_IFLNK | S_IRWXUGO, 0, 1663 &new_fe_bh, parent_fe_bh, handle, 1664 &inode, inode_ac); 1665 if (status < 0) { 1666 mlog_errno(status); 1667 goto bail; 1668 } 1669 1670 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1671 inode->i_rdev = 0; 1672 newsize = l - 1; 1673 if (l > ocfs2_fast_symlink_chars(sb)) { 1674 u32 offset = 0; 1675 1676 inode->i_op = &ocfs2_symlink_inode_operations; 1677 status = ocfs2_do_extend_allocation(osb, inode, &offset, 1, 1678 new_fe_bh, 1679 handle, data_ac, NULL, 1680 NULL); 1681 if (status < 0) { 1682 if (status != -ENOSPC && status != -EINTR) { 1683 mlog(ML_ERROR, 1684 "Failed to extend file to %llu\n", 1685 (unsigned long long)newsize); 1686 mlog_errno(status); 1687 status = -ENOSPC; 1688 } 1689 goto bail; 1690 } 1691 i_size_write(inode, newsize); 1692 inode->i_blocks = ocfs2_inode_sector_count(inode); 1693 } else { 1694 inode->i_op = &ocfs2_fast_symlink_inode_operations; 1695 memcpy((char *) fe->id2.i_symlink, symname, l); 1696 i_size_write(inode, newsize); 1697 inode->i_blocks = 0; 1698 } 1699 1700 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1701 if (status < 0) { 1702 mlog_errno(status); 1703 goto bail; 1704 } 1705 1706 if (!ocfs2_inode_is_fast_symlink(inode)) { 1707 status = ocfs2_create_symlink_data(osb, handle, inode, 1708 symname); 1709 if (status < 0) { 1710 mlog_errno(status); 1711 goto bail; 1712 } 1713 } 1714 1715 status = ocfs2_add_entry(handle, dentry, inode, 1716 le64_to_cpu(fe->i_blkno), parent_fe_bh, 1717 de_bh); 1718 if (status < 0) { 1719 mlog_errno(status); 1720 goto bail; 1721 } 1722 1723 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 1724 if (status) { 1725 mlog_errno(status); 1726 goto bail; 1727 } 1728 1729 insert_inode_hash(inode); 1730 dentry->d_op = &ocfs2_dentry_ops; 1731 d_instantiate(dentry, inode); 1732 bail: 1733 if (handle) 1734 ocfs2_commit_trans(osb, handle); 1735 1736 ocfs2_meta_unlock(dir, 1); 1737 1738 if (new_fe_bh) 1739 brelse(new_fe_bh); 1740 if (parent_fe_bh) 1741 brelse(parent_fe_bh); 1742 if (de_bh) 1743 brelse(de_bh); 1744 if (inode_ac) 1745 ocfs2_free_alloc_context(inode_ac); 1746 if (data_ac) 1747 ocfs2_free_alloc_context(data_ac); 1748 if ((status < 0) && inode) 1749 iput(inode); 1750 1751 mlog_exit(status); 1752 1753 return status; 1754 } 1755 1756 int ocfs2_check_dir_entry(struct inode * dir, 1757 struct ocfs2_dir_entry * de, 1758 struct buffer_head * bh, 1759 unsigned long offset) 1760 { 1761 const char *error_msg = NULL; 1762 const int rlen = le16_to_cpu(de->rec_len); 1763 1764 if (rlen < OCFS2_DIR_REC_LEN(1)) 1765 error_msg = "rec_len is smaller than minimal"; 1766 else if (rlen % 4 != 0) 1767 error_msg = "rec_len % 4 != 0"; 1768 else if (rlen < OCFS2_DIR_REC_LEN(de->name_len)) 1769 error_msg = "rec_len is too small for name_len"; 1770 else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize) 1771 error_msg = "directory entry across blocks"; 1772 1773 if (error_msg != NULL) 1774 mlog(ML_ERROR, "bad entry in directory #%llu: %s - " 1775 "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n", 1776 (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg, 1777 offset, (unsigned long long)le64_to_cpu(de->inode), rlen, 1778 de->name_len); 1779 return error_msg == NULL ? 1 : 0; 1780 } 1781 1782 /* we don't always have a dentry for what we want to add, so people 1783 * like orphan dir can call this instead. 1784 * 1785 * If you pass me insert_bh, I'll skip the search of the other dir 1786 * blocks and put the record in there. 1787 */ 1788 static int __ocfs2_add_entry(handle_t *handle, 1789 struct inode *dir, 1790 const char *name, int namelen, 1791 struct inode *inode, u64 blkno, 1792 struct buffer_head *parent_fe_bh, 1793 struct buffer_head *insert_bh) 1794 { 1795 unsigned long offset; 1796 unsigned short rec_len; 1797 struct ocfs2_dir_entry *de, *de1; 1798 struct super_block *sb; 1799 int retval, status; 1800 1801 mlog_entry_void(); 1802 1803 sb = dir->i_sb; 1804 1805 if (!namelen) 1806 return -EINVAL; 1807 1808 rec_len = OCFS2_DIR_REC_LEN(namelen); 1809 offset = 0; 1810 de = (struct ocfs2_dir_entry *) insert_bh->b_data; 1811 while (1) { 1812 BUG_ON((char *)de >= sb->s_blocksize + insert_bh->b_data); 1813 /* These checks should've already been passed by the 1814 * prepare function, but I guess we can leave them 1815 * here anyway. */ 1816 if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) { 1817 retval = -ENOENT; 1818 goto bail; 1819 } 1820 if (ocfs2_match(namelen, name, de)) { 1821 retval = -EEXIST; 1822 goto bail; 1823 } 1824 if (((le64_to_cpu(de->inode) == 0) && 1825 (le16_to_cpu(de->rec_len) >= rec_len)) || 1826 (le16_to_cpu(de->rec_len) >= 1827 (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) { 1828 dir->i_mtime = dir->i_ctime = CURRENT_TIME; 1829 retval = ocfs2_mark_inode_dirty(handle, dir, parent_fe_bh); 1830 if (retval < 0) { 1831 mlog_errno(retval); 1832 goto bail; 1833 } 1834 1835 status = ocfs2_journal_access(handle, dir, insert_bh, 1836 OCFS2_JOURNAL_ACCESS_WRITE); 1837 /* By now the buffer is marked for journaling */ 1838 offset += le16_to_cpu(de->rec_len); 1839 if (le64_to_cpu(de->inode)) { 1840 de1 = (struct ocfs2_dir_entry *)((char *) de + 1841 OCFS2_DIR_REC_LEN(de->name_len)); 1842 de1->rec_len = 1843 cpu_to_le16(le16_to_cpu(de->rec_len) - 1844 OCFS2_DIR_REC_LEN(de->name_len)); 1845 de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); 1846 de = de1; 1847 } 1848 de->file_type = OCFS2_FT_UNKNOWN; 1849 if (blkno) { 1850 de->inode = cpu_to_le64(blkno); 1851 ocfs2_set_de_type(de, inode->i_mode); 1852 } else 1853 de->inode = 0; 1854 de->name_len = namelen; 1855 memcpy(de->name, name, namelen); 1856 1857 dir->i_version++; 1858 status = ocfs2_journal_dirty(handle, insert_bh); 1859 retval = 0; 1860 goto bail; 1861 } 1862 offset += le16_to_cpu(de->rec_len); 1863 de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len)); 1864 } 1865 1866 /* when you think about it, the assert above should prevent us 1867 * from ever getting here. */ 1868 retval = -ENOSPC; 1869 bail: 1870 1871 mlog_exit(retval); 1872 return retval; 1873 } 1874 1875 1876 /* 1877 * ocfs2_delete_entry deletes a directory entry by merging it with the 1878 * previous entry 1879 */ 1880 static int ocfs2_delete_entry(handle_t *handle, 1881 struct inode *dir, 1882 struct ocfs2_dir_entry *de_del, 1883 struct buffer_head *bh) 1884 { 1885 struct ocfs2_dir_entry *de, *pde; 1886 int i, status = -ENOENT; 1887 1888 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh); 1889 1890 i = 0; 1891 pde = NULL; 1892 de = (struct ocfs2_dir_entry *) bh->b_data; 1893 while (i < bh->b_size) { 1894 if (!ocfs2_check_dir_entry(dir, de, bh, i)) { 1895 status = -EIO; 1896 mlog_errno(status); 1897 goto bail; 1898 } 1899 if (de == de_del) { 1900 status = ocfs2_journal_access(handle, dir, bh, 1901 OCFS2_JOURNAL_ACCESS_WRITE); 1902 if (status < 0) { 1903 status = -EIO; 1904 mlog_errno(status); 1905 goto bail; 1906 } 1907 if (pde) 1908 pde->rec_len = 1909 cpu_to_le16(le16_to_cpu(pde->rec_len) + 1910 le16_to_cpu(de->rec_len)); 1911 else 1912 de->inode = 0; 1913 dir->i_version++; 1914 status = ocfs2_journal_dirty(handle, bh); 1915 goto bail; 1916 } 1917 i += le16_to_cpu(de->rec_len); 1918 pde = de; 1919 de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len)); 1920 } 1921 bail: 1922 mlog_exit(status); 1923 return status; 1924 } 1925 1926 /* 1927 * Returns 0 if not found, -1 on failure, and 1 on success 1928 */ 1929 static int inline ocfs2_search_dirblock(struct buffer_head *bh, 1930 struct inode *dir, 1931 const char *name, int namelen, 1932 unsigned long offset, 1933 struct ocfs2_dir_entry **res_dir) 1934 { 1935 struct ocfs2_dir_entry *de; 1936 char *dlimit, *de_buf; 1937 int de_len; 1938 int ret = 0; 1939 1940 mlog_entry_void(); 1941 1942 de_buf = bh->b_data; 1943 dlimit = de_buf + dir->i_sb->s_blocksize; 1944 1945 while (de_buf < dlimit) { 1946 /* this code is executed quadratically often */ 1947 /* do minimal checking `by hand' */ 1948 1949 de = (struct ocfs2_dir_entry *) de_buf; 1950 1951 if (de_buf + namelen <= dlimit && 1952 ocfs2_match(namelen, name, de)) { 1953 /* found a match - just to be sure, do a full check */ 1954 if (!ocfs2_check_dir_entry(dir, de, bh, offset)) { 1955 ret = -1; 1956 goto bail; 1957 } 1958 *res_dir = de; 1959 ret = 1; 1960 goto bail; 1961 } 1962 1963 /* prevent looping on a bad block */ 1964 de_len = le16_to_cpu(de->rec_len); 1965 if (de_len <= 0) { 1966 ret = -1; 1967 goto bail; 1968 } 1969 1970 de_buf += de_len; 1971 offset += de_len; 1972 } 1973 1974 bail: 1975 mlog_exit(ret); 1976 return ret; 1977 } 1978 1979 struct buffer_head *ocfs2_find_entry(const char *name, int namelen, 1980 struct inode *dir, 1981 struct ocfs2_dir_entry **res_dir) 1982 { 1983 struct super_block *sb; 1984 struct buffer_head *bh_use[NAMEI_RA_SIZE]; 1985 struct buffer_head *bh, *ret = NULL; 1986 unsigned long start, block, b; 1987 int ra_max = 0; /* Number of bh's in the readahead 1988 buffer, bh_use[] */ 1989 int ra_ptr = 0; /* Current index into readahead 1990 buffer */ 1991 int num = 0; 1992 int nblocks, i, err; 1993 1994 mlog_entry_void(); 1995 1996 *res_dir = NULL; 1997 sb = dir->i_sb; 1998 1999 nblocks = i_size_read(dir) >> sb->s_blocksize_bits; 2000 start = OCFS2_I(dir)->ip_dir_start_lookup; 2001 if (start >= nblocks) 2002 start = 0; 2003 block = start; 2004 2005 restart: 2006 do { 2007 /* 2008 * We deal with the read-ahead logic here. 2009 */ 2010 if (ra_ptr >= ra_max) { 2011 /* Refill the readahead buffer */ 2012 ra_ptr = 0; 2013 b = block; 2014 for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) { 2015 /* 2016 * Terminate if we reach the end of the 2017 * directory and must wrap, or if our 2018 * search has finished at this block. 2019 */ 2020 if (b >= nblocks || (num && block == start)) { 2021 bh_use[ra_max] = NULL; 2022 break; 2023 } 2024 num++; 2025 2026 bh = ocfs2_bread(dir, b++, &err, 1); 2027 bh_use[ra_max] = bh; 2028 } 2029 } 2030 if ((bh = bh_use[ra_ptr++]) == NULL) 2031 goto next; 2032 wait_on_buffer(bh); 2033 if (!buffer_uptodate(bh)) { 2034 /* read error, skip block & hope for the best */ 2035 ocfs2_error(dir->i_sb, "reading directory %llu, " 2036 "offset %lu\n", 2037 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2038 block); 2039 brelse(bh); 2040 goto next; 2041 } 2042 i = ocfs2_search_dirblock(bh, dir, name, namelen, 2043 block << sb->s_blocksize_bits, 2044 res_dir); 2045 if (i == 1) { 2046 OCFS2_I(dir)->ip_dir_start_lookup = block; 2047 ret = bh; 2048 goto cleanup_and_exit; 2049 } else { 2050 brelse(bh); 2051 if (i < 0) 2052 goto cleanup_and_exit; 2053 } 2054 next: 2055 if (++block >= nblocks) 2056 block = 0; 2057 } while (block != start); 2058 2059 /* 2060 * If the directory has grown while we were searching, then 2061 * search the last part of the directory before giving up. 2062 */ 2063 block = nblocks; 2064 nblocks = i_size_read(dir) >> sb->s_blocksize_bits; 2065 if (block < nblocks) { 2066 start = 0; 2067 goto restart; 2068 } 2069 2070 cleanup_and_exit: 2071 /* Clean up the read-ahead blocks */ 2072 for (; ra_ptr < ra_max; ra_ptr++) 2073 brelse(bh_use[ra_ptr]); 2074 2075 mlog_exit_ptr(ret); 2076 return ret; 2077 } 2078 2079 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2080 { 2081 int status, namelen; 2082 2083 mlog_entry_void(); 2084 2085 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2086 (long long)blkno); 2087 if (namelen <= 0) { 2088 if (namelen) 2089 status = namelen; 2090 else 2091 status = -EINVAL; 2092 mlog_errno(status); 2093 goto bail; 2094 } 2095 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2096 status = -EINVAL; 2097 mlog_errno(status); 2098 goto bail; 2099 } 2100 2101 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, 2102 namelen); 2103 2104 status = 0; 2105 bail: 2106 mlog_exit(status); 2107 return status; 2108 } 2109 2110 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2111 struct inode **ret_orphan_dir, 2112 struct inode *inode, 2113 char *name, 2114 struct buffer_head **de_bh) 2115 { 2116 struct inode *orphan_dir_inode; 2117 struct buffer_head *orphan_dir_bh = NULL; 2118 int status = 0; 2119 2120 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2121 if (status < 0) { 2122 mlog_errno(status); 2123 return status; 2124 } 2125 2126 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2127 ORPHAN_DIR_SYSTEM_INODE, 2128 osb->slot_num); 2129 if (!orphan_dir_inode) { 2130 status = -ENOENT; 2131 mlog_errno(status); 2132 return status; 2133 } 2134 2135 mutex_lock(&orphan_dir_inode->i_mutex); 2136 2137 status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2138 if (status < 0) { 2139 mlog_errno(status); 2140 goto leave; 2141 } 2142 2143 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2144 orphan_dir_bh, name, 2145 OCFS2_ORPHAN_NAMELEN, de_bh); 2146 if (status < 0) { 2147 ocfs2_meta_unlock(orphan_dir_inode, 1); 2148 2149 mlog_errno(status); 2150 goto leave; 2151 } 2152 2153 *ret_orphan_dir = orphan_dir_inode; 2154 2155 leave: 2156 if (status) { 2157 mutex_unlock(&orphan_dir_inode->i_mutex); 2158 iput(orphan_dir_inode); 2159 } 2160 2161 if (orphan_dir_bh) 2162 brelse(orphan_dir_bh); 2163 2164 mlog_exit(status); 2165 return status; 2166 } 2167 2168 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2169 handle_t *handle, 2170 struct inode *inode, 2171 struct ocfs2_dinode *fe, 2172 char *name, 2173 struct buffer_head *de_bh, 2174 struct inode *orphan_dir_inode) 2175 { 2176 struct buffer_head *orphan_dir_bh = NULL; 2177 int status = 0; 2178 struct ocfs2_dinode *orphan_fe; 2179 2180 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); 2181 2182 status = ocfs2_read_block(osb, 2183 OCFS2_I(orphan_dir_inode)->ip_blkno, 2184 &orphan_dir_bh, OCFS2_BH_CACHED, 2185 orphan_dir_inode); 2186 if (status < 0) { 2187 mlog_errno(status); 2188 goto leave; 2189 } 2190 2191 status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, 2192 OCFS2_JOURNAL_ACCESS_WRITE); 2193 if (status < 0) { 2194 mlog_errno(status); 2195 goto leave; 2196 } 2197 2198 /* we're a cluster, and nlink can change on disk from 2199 * underneath us... */ 2200 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2201 if (S_ISDIR(inode->i_mode)) 2202 le16_add_cpu(&orphan_fe->i_links_count, 1); 2203 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); 2204 2205 status = ocfs2_journal_dirty(handle, orphan_dir_bh); 2206 if (status < 0) { 2207 mlog_errno(status); 2208 goto leave; 2209 } 2210 2211 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2212 OCFS2_ORPHAN_NAMELEN, inode, 2213 OCFS2_I(inode)->ip_blkno, 2214 orphan_dir_bh, de_bh); 2215 if (status < 0) { 2216 mlog_errno(status); 2217 goto leave; 2218 } 2219 2220 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); 2221 2222 /* Record which orphan dir our inode now resides 2223 * in. delete_inode will use this to determine which orphan 2224 * dir to lock. */ 2225 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); 2226 2227 mlog(0, "Inode %llu orphaned in slot %d\n", 2228 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); 2229 2230 leave: 2231 if (orphan_dir_bh) 2232 brelse(orphan_dir_bh); 2233 2234 mlog_exit(status); 2235 return status; 2236 } 2237 2238 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2239 int ocfs2_orphan_del(struct ocfs2_super *osb, 2240 handle_t *handle, 2241 struct inode *orphan_dir_inode, 2242 struct inode *inode, 2243 struct buffer_head *orphan_dir_bh) 2244 { 2245 char name[OCFS2_ORPHAN_NAMELEN + 1]; 2246 struct ocfs2_dinode *orphan_fe; 2247 int status = 0; 2248 struct buffer_head *target_de_bh = NULL; 2249 struct ocfs2_dir_entry *target_de = NULL; 2250 2251 mlog_entry_void(); 2252 2253 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2254 if (status < 0) { 2255 mlog_errno(status); 2256 goto leave; 2257 } 2258 2259 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", 2260 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2261 OCFS2_ORPHAN_NAMELEN); 2262 2263 /* find it's spot in the orphan directory */ 2264 target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, 2265 orphan_dir_inode, &target_de); 2266 if (!target_de_bh) { 2267 status = -ENOENT; 2268 mlog_errno(status); 2269 goto leave; 2270 } 2271 2272 /* remove it from the orphan directory */ 2273 status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, 2274 target_de_bh); 2275 if (status < 0) { 2276 mlog_errno(status); 2277 goto leave; 2278 } 2279 2280 status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, 2281 OCFS2_JOURNAL_ACCESS_WRITE); 2282 if (status < 0) { 2283 mlog_errno(status); 2284 goto leave; 2285 } 2286 2287 /* do the i_nlink dance! :) */ 2288 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2289 if (S_ISDIR(inode->i_mode)) 2290 le16_add_cpu(&orphan_fe->i_links_count, -1); 2291 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); 2292 2293 status = ocfs2_journal_dirty(handle, orphan_dir_bh); 2294 if (status < 0) { 2295 mlog_errno(status); 2296 goto leave; 2297 } 2298 2299 leave: 2300 if (target_de_bh) 2301 brelse(target_de_bh); 2302 2303 mlog_exit(status); 2304 return status; 2305 } 2306 2307 const struct inode_operations ocfs2_dir_iops = { 2308 .create = ocfs2_create, 2309 .lookup = ocfs2_lookup, 2310 .link = ocfs2_link, 2311 .unlink = ocfs2_unlink, 2312 .rmdir = ocfs2_unlink, 2313 .symlink = ocfs2_symlink, 2314 .mkdir = ocfs2_mkdir, 2315 .mknod = ocfs2_mknod, 2316 .rename = ocfs2_rename, 2317 .setattr = ocfs2_setattr, 2318 .getattr = ocfs2_getattr, 2319 .permission = ocfs2_permission, 2320 }; 2321