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 mlog(ML_ERROR, "Unable to create inode %llu\n", 179 (unsigned long long)blkno); 180 ret = ERR_PTR(-EACCES); 181 goto bail_unlock; 182 } 183 184 oi = OCFS2_I(inode); 185 /* Clear any orphaned state... If we were able to look up the 186 * inode from a directory, it certainly can't be orphaned. We 187 * might have the bad state from a node which intended to 188 * orphan this inode but crashed before it could commit the 189 * unlink. */ 190 spin_lock(&oi->ip_lock); 191 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; 192 oi->ip_orphaned_slot = OCFS2_INVALID_SLOT; 193 spin_unlock(&oi->ip_lock); 194 195 bail_add: 196 dentry->d_op = &ocfs2_dentry_ops; 197 ret = d_splice_alias(inode, dentry); 198 199 if (inode) { 200 /* 201 * If d_splice_alias() finds a DCACHE_DISCONNECTED 202 * dentry, it will d_move() it on top of ourse. The 203 * return value will indicate this however, so in 204 * those cases, we switch them around for the locking 205 * code. 206 * 207 * NOTE: This dentry already has ->d_op set from 208 * ocfs2_get_parent() and ocfs2_get_dentry() 209 */ 210 if (ret) 211 dentry = ret; 212 213 status = ocfs2_dentry_attach_lock(dentry, inode, 214 OCFS2_I(dir)->ip_blkno); 215 if (status) { 216 mlog_errno(status); 217 ret = ERR_PTR(status); 218 goto bail_unlock; 219 } 220 } 221 222 bail_unlock: 223 /* Don't drop the cluster lock until *after* the d_add -- 224 * unlink on another node will message us to remove that 225 * dentry under this lock so otherwise we can race this with 226 * the vote thread and have a stale dentry. */ 227 ocfs2_meta_unlock(dir, 0); 228 229 bail: 230 if (dirent_bh) 231 brelse(dirent_bh); 232 233 mlog_exit_ptr(ret); 234 235 return ret; 236 } 237 238 static int ocfs2_fill_new_dir(struct ocfs2_super *osb, 239 handle_t *handle, 240 struct inode *parent, 241 struct inode *inode, 242 struct buffer_head *fe_bh, 243 struct ocfs2_alloc_context *data_ac) 244 { 245 int status; 246 struct buffer_head *new_bh = NULL; 247 struct ocfs2_dir_entry *de = NULL; 248 249 mlog_entry_void(); 250 251 status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh, 252 data_ac, NULL, &new_bh); 253 if (status < 0) { 254 mlog_errno(status); 255 goto bail; 256 } 257 258 ocfs2_set_new_buffer_uptodate(inode, new_bh); 259 260 status = ocfs2_journal_access(handle, inode, new_bh, 261 OCFS2_JOURNAL_ACCESS_CREATE); 262 if (status < 0) { 263 mlog_errno(status); 264 goto bail; 265 } 266 memset(new_bh->b_data, 0, osb->sb->s_blocksize); 267 268 de = (struct ocfs2_dir_entry *) new_bh->b_data; 269 de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno); 270 de->name_len = 1; 271 de->rec_len = 272 cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); 273 strcpy(de->name, "."); 274 ocfs2_set_de_type(de, S_IFDIR); 275 de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len)); 276 de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno); 277 de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize - 278 OCFS2_DIR_REC_LEN(1)); 279 de->name_len = 2; 280 strcpy(de->name, ".."); 281 ocfs2_set_de_type(de, S_IFDIR); 282 283 status = ocfs2_journal_dirty(handle, new_bh); 284 if (status < 0) { 285 mlog_errno(status); 286 goto bail; 287 } 288 289 i_size_write(inode, inode->i_sb->s_blocksize); 290 inode->i_nlink = 2; 291 inode->i_blocks = ocfs2_align_bytes_to_sectors(inode->i_sb->s_blocksize); 292 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); 293 if (status < 0) { 294 mlog_errno(status); 295 goto bail; 296 } 297 298 status = 0; 299 bail: 300 if (new_bh) 301 brelse(new_bh); 302 303 mlog_exit(status); 304 return status; 305 } 306 307 static int ocfs2_mknod(struct inode *dir, 308 struct dentry *dentry, 309 int mode, 310 dev_t dev) 311 { 312 int status = 0; 313 struct buffer_head *parent_fe_bh = NULL; 314 handle_t *handle = NULL; 315 struct ocfs2_super *osb; 316 struct ocfs2_dinode *dirfe; 317 struct buffer_head *new_fe_bh = NULL; 318 struct buffer_head *de_bh = NULL; 319 struct inode *inode = NULL; 320 struct ocfs2_alloc_context *inode_ac = NULL; 321 struct ocfs2_alloc_context *data_ac = NULL; 322 323 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, 324 (unsigned long)dev, dentry->d_name.len, 325 dentry->d_name.name); 326 327 /* get our super block */ 328 osb = OCFS2_SB(dir->i_sb); 329 330 status = ocfs2_meta_lock(dir, &parent_fe_bh, 1); 331 if (status < 0) { 332 if (status != -ENOENT) 333 mlog_errno(status); 334 return status; 335 } 336 337 if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) { 338 status = -EMLINK; 339 goto leave; 340 } 341 342 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 343 if (!dirfe->i_links_count) { 344 /* can't make a file in a deleted directory. */ 345 status = -ENOENT; 346 goto leave; 347 } 348 349 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 350 dentry->d_name.len); 351 if (status) 352 goto leave; 353 354 /* get a spot inside the dir. */ 355 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 356 dentry->d_name.name, 357 dentry->d_name.len, &de_bh); 358 if (status < 0) { 359 mlog_errno(status); 360 goto leave; 361 } 362 363 /* reserve an inode spot */ 364 status = ocfs2_reserve_new_inode(osb, &inode_ac); 365 if (status < 0) { 366 if (status != -ENOSPC) 367 mlog_errno(status); 368 goto leave; 369 } 370 371 /* are we making a directory? If so, reserve a cluster for his 372 * 1st extent. */ 373 if (S_ISDIR(mode)) { 374 status = ocfs2_reserve_clusters(osb, 1, &data_ac); 375 if (status < 0) { 376 if (status != -ENOSPC) 377 mlog_errno(status); 378 goto leave; 379 } 380 } 381 382 handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS); 383 if (IS_ERR(handle)) { 384 status = PTR_ERR(handle); 385 handle = NULL; 386 mlog_errno(status); 387 goto leave; 388 } 389 390 /* do the real work now. */ 391 status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, 392 &new_fe_bh, parent_fe_bh, handle, 393 &inode, inode_ac); 394 if (status < 0) { 395 mlog_errno(status); 396 goto leave; 397 } 398 399 if (S_ISDIR(mode)) { 400 status = ocfs2_fill_new_dir(osb, handle, dir, inode, 401 new_fe_bh, data_ac); 402 if (status < 0) { 403 mlog_errno(status); 404 goto leave; 405 } 406 407 status = ocfs2_journal_access(handle, dir, parent_fe_bh, 408 OCFS2_JOURNAL_ACCESS_WRITE); 409 if (status < 0) { 410 mlog_errno(status); 411 goto leave; 412 } 413 le16_add_cpu(&dirfe->i_links_count, 1); 414 status = ocfs2_journal_dirty(handle, parent_fe_bh); 415 if (status < 0) { 416 mlog_errno(status); 417 goto leave; 418 } 419 inc_nlink(dir); 420 } 421 422 status = ocfs2_add_entry(handle, dentry, inode, 423 OCFS2_I(inode)->ip_blkno, parent_fe_bh, 424 de_bh); 425 if (status < 0) { 426 mlog_errno(status); 427 goto leave; 428 } 429 430 status = ocfs2_dentry_attach_lock(dentry, inode, 431 OCFS2_I(dir)->ip_blkno); 432 if (status) { 433 mlog_errno(status); 434 goto leave; 435 } 436 437 insert_inode_hash(inode); 438 dentry->d_op = &ocfs2_dentry_ops; 439 d_instantiate(dentry, inode); 440 status = 0; 441 leave: 442 if (handle) 443 ocfs2_commit_trans(osb, handle); 444 445 ocfs2_meta_unlock(dir, 1); 446 447 if (status == -ENOSPC) 448 mlog(0, "Disk is full\n"); 449 450 if (new_fe_bh) 451 brelse(new_fe_bh); 452 453 if (de_bh) 454 brelse(de_bh); 455 456 if (parent_fe_bh) 457 brelse(parent_fe_bh); 458 459 if ((status < 0) && inode) 460 iput(inode); 461 462 if (inode_ac) 463 ocfs2_free_alloc_context(inode_ac); 464 465 if (data_ac) 466 ocfs2_free_alloc_context(data_ac); 467 468 mlog_exit(status); 469 470 return status; 471 } 472 473 static int ocfs2_mknod_locked(struct ocfs2_super *osb, 474 struct inode *dir, 475 struct dentry *dentry, int mode, 476 dev_t dev, 477 struct buffer_head **new_fe_bh, 478 struct buffer_head *parent_fe_bh, 479 handle_t *handle, 480 struct inode **ret_inode, 481 struct ocfs2_alloc_context *inode_ac) 482 { 483 int status = 0; 484 struct ocfs2_dinode *fe = NULL; 485 struct ocfs2_extent_list *fel; 486 u64 fe_blkno = 0; 487 u16 suballoc_bit; 488 struct inode *inode = NULL; 489 490 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, 491 (unsigned long)dev, dentry->d_name.len, 492 dentry->d_name.name); 493 494 *new_fe_bh = NULL; 495 *ret_inode = NULL; 496 497 status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, 498 &fe_blkno); 499 if (status < 0) { 500 mlog_errno(status); 501 goto leave; 502 } 503 504 inode = new_inode(dir->i_sb); 505 if (IS_ERR(inode)) { 506 status = PTR_ERR(inode); 507 mlog(ML_ERROR, "new_inode failed!\n"); 508 goto leave; 509 } 510 511 /* populate as many fields early on as possible - many of 512 * these are used by the support functions here and in 513 * callers. */ 514 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); 515 OCFS2_I(inode)->ip_blkno = fe_blkno; 516 if (S_ISDIR(mode)) 517 inode->i_nlink = 2; 518 else 519 inode->i_nlink = 1; 520 inode->i_mode = mode; 521 spin_lock(&osb->osb_lock); 522 inode->i_generation = osb->s_next_generation++; 523 spin_unlock(&osb->osb_lock); 524 525 *new_fe_bh = sb_getblk(osb->sb, fe_blkno); 526 if (!*new_fe_bh) { 527 status = -EIO; 528 mlog_errno(status); 529 goto leave; 530 } 531 ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); 532 533 status = ocfs2_journal_access(handle, inode, *new_fe_bh, 534 OCFS2_JOURNAL_ACCESS_CREATE); 535 if (status < 0) { 536 mlog_errno(status); 537 goto leave; 538 } 539 540 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; 541 memset(fe, 0, osb->sb->s_blocksize); 542 543 fe->i_generation = cpu_to_le32(inode->i_generation); 544 fe->i_fs_generation = cpu_to_le32(osb->fs_generation); 545 fe->i_blkno = cpu_to_le64(fe_blkno); 546 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); 547 fe->i_suballoc_slot = cpu_to_le16(osb->slot_num); 548 fe->i_uid = cpu_to_le32(current->fsuid); 549 if (dir->i_mode & S_ISGID) { 550 fe->i_gid = cpu_to_le32(dir->i_gid); 551 if (S_ISDIR(mode)) 552 mode |= S_ISGID; 553 } else 554 fe->i_gid = cpu_to_le32(current->fsgid); 555 fe->i_mode = cpu_to_le16(mode); 556 if (S_ISCHR(mode) || S_ISBLK(mode)) 557 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); 558 559 fe->i_links_count = cpu_to_le16(inode->i_nlink); 560 561 fe->i_last_eb_blk = 0; 562 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); 563 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); 564 fe->i_atime = fe->i_ctime = fe->i_mtime = 565 cpu_to_le64(CURRENT_TIME.tv_sec); 566 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = 567 cpu_to_le32(CURRENT_TIME.tv_nsec); 568 fe->i_dtime = 0; 569 570 fel = &fe->id2.i_list; 571 fel->l_tree_depth = 0; 572 fel->l_next_free_rec = 0; 573 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); 574 575 status = ocfs2_journal_dirty(handle, *new_fe_bh); 576 if (status < 0) { 577 mlog_errno(status); 578 goto leave; 579 } 580 581 if (ocfs2_populate_inode(inode, fe, 1) < 0) { 582 mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, " 583 "i_blkno=%llu, i_ino=%lu\n", 584 (unsigned long long) (*new_fe_bh)->b_blocknr, 585 (unsigned long long)fe->i_blkno, inode->i_ino); 586 BUG(); 587 } 588 589 ocfs2_inode_set_new(osb, inode); 590 status = ocfs2_create_new_inode_locks(inode); 591 if (status < 0) 592 mlog_errno(status); 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 if (S_ISDIR(inode->i_mode)) { 934 drop_nlink(dir); 935 status = ocfs2_mark_inode_dirty(handle, dir, 936 parent_node_bh); 937 if (status < 0) { 938 mlog_errno(status); 939 inc_nlink(dir); 940 } 941 } 942 943 leave: 944 if (handle) 945 ocfs2_commit_trans(osb, handle); 946 947 if (child_locked) 948 ocfs2_meta_unlock(inode, 1); 949 950 ocfs2_meta_unlock(dir, 1); 951 952 if (orphan_dir) { 953 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 954 ocfs2_meta_unlock(orphan_dir, 1); 955 mutex_unlock(&orphan_dir->i_mutex); 956 iput(orphan_dir); 957 } 958 959 if (fe_bh) 960 brelse(fe_bh); 961 962 if (dirent_bh) 963 brelse(dirent_bh); 964 965 if (parent_node_bh) 966 brelse(parent_node_bh); 967 968 if (orphan_entry_bh) 969 brelse(orphan_entry_bh); 970 971 mlog_exit(status); 972 973 return status; 974 } 975 976 /* 977 * The only place this should be used is rename! 978 * if they have the same id, then the 1st one is the only one locked. 979 */ 980 static int ocfs2_double_lock(struct ocfs2_super *osb, 981 struct buffer_head **bh1, 982 struct inode *inode1, 983 struct buffer_head **bh2, 984 struct inode *inode2) 985 { 986 int status; 987 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); 988 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 989 struct buffer_head **tmpbh; 990 struct inode *tmpinode; 991 992 mlog_entry("(inode1 = %llu, inode2 = %llu)\n", 993 (unsigned long long)oi1->ip_blkno, 994 (unsigned long long)oi2->ip_blkno); 995 996 if (*bh1) 997 *bh1 = NULL; 998 if (*bh2) 999 *bh2 = NULL; 1000 1001 /* we always want to lock the one with the lower lockid first. */ 1002 if (oi1->ip_blkno != oi2->ip_blkno) { 1003 if (oi1->ip_blkno < oi2->ip_blkno) { 1004 /* switch id1 and id2 around */ 1005 mlog(0, "switching them around...\n"); 1006 tmpbh = bh2; 1007 bh2 = bh1; 1008 bh1 = tmpbh; 1009 1010 tmpinode = inode2; 1011 inode2 = inode1; 1012 inode1 = tmpinode; 1013 } 1014 /* lock id2 */ 1015 status = ocfs2_meta_lock(inode2, bh2, 1); 1016 if (status < 0) { 1017 if (status != -ENOENT) 1018 mlog_errno(status); 1019 goto bail; 1020 } 1021 } 1022 1023 /* lock id1 */ 1024 status = ocfs2_meta_lock(inode1, bh1, 1); 1025 if (status < 0) { 1026 /* 1027 * An error return must mean that no cluster locks 1028 * were held on function exit. 1029 */ 1030 if (oi1->ip_blkno != oi2->ip_blkno) 1031 ocfs2_meta_unlock(inode2, 1); 1032 1033 if (status != -ENOENT) 1034 mlog_errno(status); 1035 } 1036 1037 bail: 1038 mlog_exit(status); 1039 return status; 1040 } 1041 1042 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) 1043 { 1044 ocfs2_meta_unlock(inode1, 1); 1045 1046 if (inode1 != inode2) 1047 ocfs2_meta_unlock(inode2, 1); 1048 } 1049 1050 #define PARENT_INO(buffer) \ 1051 ((struct ocfs2_dir_entry *) \ 1052 ((char *)buffer + \ 1053 le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode 1054 1055 static int ocfs2_rename(struct inode *old_dir, 1056 struct dentry *old_dentry, 1057 struct inode *new_dir, 1058 struct dentry *new_dentry) 1059 { 1060 int status = 0, rename_lock = 0, parents_locked = 0; 1061 int old_child_locked = 0, new_child_locked = 0; 1062 struct inode *old_inode = old_dentry->d_inode; 1063 struct inode *new_inode = new_dentry->d_inode; 1064 struct inode *orphan_dir = NULL; 1065 struct ocfs2_dinode *newfe = NULL; 1066 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; 1067 struct buffer_head *orphan_entry_bh = NULL; 1068 struct buffer_head *newfe_bh = NULL; 1069 struct buffer_head *insert_entry_bh = NULL; 1070 struct ocfs2_super *osb = NULL; 1071 u64 newfe_blkno; 1072 handle_t *handle = NULL; 1073 struct buffer_head *old_dir_bh = NULL; 1074 struct buffer_head *new_dir_bh = NULL; 1075 struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry 1076 // and new_dentry 1077 struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above 1078 struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, 1079 // this is the 1st dirent bh 1080 nlink_t old_dir_nlink = old_dir->i_nlink, new_dir_nlink = new_dir->i_nlink; 1081 1082 /* At some point it might be nice to break this function up a 1083 * bit. */ 1084 1085 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", 1086 old_dir, old_dentry, new_dir, new_dentry, 1087 old_dentry->d_name.len, old_dentry->d_name.name, 1088 new_dentry->d_name.len, new_dentry->d_name.name); 1089 1090 osb = OCFS2_SB(old_dir->i_sb); 1091 1092 if (new_inode) { 1093 if (!igrab(new_inode)) 1094 BUG(); 1095 } 1096 1097 /* Assume a directory heirarchy thusly: 1098 * a/b/c 1099 * a/d 1100 * a,b,c, and d are all directories. 1101 * 1102 * from cwd of 'a' on both nodes: 1103 * node1: mv b/c d 1104 * node2: mv d b/c 1105 * 1106 * And that's why, just like the VFS, we need a file system 1107 * rename lock. */ 1108 if (old_dentry != new_dentry) { 1109 status = ocfs2_rename_lock(osb); 1110 if (status < 0) { 1111 mlog_errno(status); 1112 goto bail; 1113 } 1114 rename_lock = 1; 1115 } 1116 1117 /* if old and new are the same, this'll just do one lock. */ 1118 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, 1119 &new_dir_bh, new_dir); 1120 if (status < 0) { 1121 mlog_errno(status); 1122 goto bail; 1123 } 1124 parents_locked = 1; 1125 1126 /* make sure both dirs have bhs 1127 * get an extra ref on old_dir_bh if old==new */ 1128 if (!new_dir_bh) { 1129 if (old_dir_bh) { 1130 new_dir_bh = old_dir_bh; 1131 get_bh(new_dir_bh); 1132 } else { 1133 mlog(ML_ERROR, "no old_dir_bh!\n"); 1134 status = -EIO; 1135 goto bail; 1136 } 1137 } 1138 1139 /* 1140 * Though we don't require an inode meta data update if 1141 * old_inode is not a directory, we lock anyway here to ensure 1142 * the vote thread on other nodes won't have to concurrently 1143 * downconvert the inode and the dentry locks. 1144 */ 1145 status = ocfs2_meta_lock(old_inode, NULL, 1); 1146 if (status < 0) { 1147 if (status != -ENOENT) 1148 mlog_errno(status); 1149 goto bail; 1150 } 1151 old_child_locked = 1; 1152 1153 status = ocfs2_remote_dentry_delete(old_dentry); 1154 if (status < 0) { 1155 mlog_errno(status); 1156 goto bail; 1157 } 1158 1159 if (S_ISDIR(old_inode->i_mode)) { 1160 status = -EIO; 1161 old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0); 1162 if (!old_inode_de_bh) 1163 goto bail; 1164 1165 status = -EIO; 1166 if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) != 1167 OCFS2_I(old_dir)->ip_blkno) 1168 goto bail; 1169 status = -EMLINK; 1170 if (!new_inode && new_dir!=old_dir && 1171 new_dir->i_nlink >= OCFS2_LINK_MAX) 1172 goto bail; 1173 } 1174 1175 status = -ENOENT; 1176 old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, 1177 old_dentry->d_name.len, 1178 old_dir, &old_de); 1179 if (!old_de_bh) 1180 goto bail; 1181 1182 /* 1183 * Check for inode number is _not_ due to possible IO errors. 1184 * We might rmdir the source, keep it as pwd of some process 1185 * and merrily kill the link to whatever was created under the 1186 * same name. Goodbye sticky bit ;-< 1187 */ 1188 if (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno) 1189 goto bail; 1190 1191 /* check if the target already exists (in which case we need 1192 * to delete it */ 1193 status = ocfs2_find_files_on_disk(new_dentry->d_name.name, 1194 new_dentry->d_name.len, 1195 &newfe_blkno, new_dir, &new_de_bh, 1196 &new_de); 1197 /* The only error we allow here is -ENOENT because the new 1198 * file not existing is perfectly valid. */ 1199 if ((status < 0) && (status != -ENOENT)) { 1200 /* If we cannot find the file specified we should just */ 1201 /* return the error... */ 1202 mlog_errno(status); 1203 goto bail; 1204 } 1205 1206 if (!new_de && new_inode) 1207 mlog(ML_ERROR, "inode %lu does not exist in it's parent " 1208 "directory!", new_inode->i_ino); 1209 1210 /* In case we need to overwrite an existing file, we blow it 1211 * away first */ 1212 if (new_de) { 1213 /* VFS didn't think there existed an inode here, but 1214 * someone else in the cluster must have raced our 1215 * rename to create one. Today we error cleanly, in 1216 * the future we should consider calling iget to build 1217 * a new struct inode for this entry. */ 1218 if (!new_inode) { 1219 status = -EACCES; 1220 1221 mlog(0, "We found an inode for name %.*s but VFS " 1222 "didn't give us one.\n", new_dentry->d_name.len, 1223 new_dentry->d_name.name); 1224 goto bail; 1225 } 1226 1227 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { 1228 status = -EACCES; 1229 1230 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", 1231 (unsigned long long)OCFS2_I(new_inode)->ip_blkno, 1232 (unsigned long long)newfe_blkno, 1233 OCFS2_I(new_inode)->ip_flags); 1234 goto bail; 1235 } 1236 1237 status = ocfs2_meta_lock(new_inode, &newfe_bh, 1); 1238 if (status < 0) { 1239 if (status != -ENOENT) 1240 mlog_errno(status); 1241 goto bail; 1242 } 1243 new_child_locked = 1; 1244 1245 status = ocfs2_remote_dentry_delete(new_dentry); 1246 if (status < 0) { 1247 mlog_errno(status); 1248 goto bail; 1249 } 1250 1251 newfe = (struct ocfs2_dinode *) newfe_bh->b_data; 1252 1253 mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " 1254 "newfebh=%p bhblocknr=%llu\n", new_de, 1255 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? 1256 (unsigned long long)newfe_bh->b_blocknr : 0ULL); 1257 1258 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { 1259 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, 1260 new_inode, 1261 orphan_name, 1262 &orphan_entry_bh); 1263 if (status < 0) { 1264 mlog_errno(status); 1265 goto bail; 1266 } 1267 } 1268 } else { 1269 BUG_ON(new_dentry->d_parent->d_inode != new_dir); 1270 1271 status = ocfs2_check_dir_for_entry(new_dir, 1272 new_dentry->d_name.name, 1273 new_dentry->d_name.len); 1274 if (status) 1275 goto bail; 1276 1277 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, 1278 new_dentry->d_name.name, 1279 new_dentry->d_name.len, 1280 &insert_entry_bh); 1281 if (status < 0) { 1282 mlog_errno(status); 1283 goto bail; 1284 } 1285 } 1286 1287 handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS); 1288 if (IS_ERR(handle)) { 1289 status = PTR_ERR(handle); 1290 handle = NULL; 1291 mlog_errno(status); 1292 goto bail; 1293 } 1294 1295 if (new_de) { 1296 if (S_ISDIR(new_inode->i_mode)) { 1297 if (!ocfs2_empty_dir(new_inode) || 1298 new_inode->i_nlink != 2) { 1299 status = -ENOTEMPTY; 1300 goto bail; 1301 } 1302 } 1303 status = ocfs2_journal_access(handle, new_inode, newfe_bh, 1304 OCFS2_JOURNAL_ACCESS_WRITE); 1305 if (status < 0) { 1306 mlog_errno(status); 1307 goto bail; 1308 } 1309 1310 if (S_ISDIR(new_inode->i_mode) || 1311 (newfe->i_links_count == cpu_to_le16(1))){ 1312 status = ocfs2_orphan_add(osb, handle, new_inode, 1313 newfe, orphan_name, 1314 orphan_entry_bh, orphan_dir); 1315 if (status < 0) { 1316 mlog_errno(status); 1317 goto bail; 1318 } 1319 } 1320 1321 /* change the dirent to point to the correct inode */ 1322 status = ocfs2_journal_access(handle, new_dir, new_de_bh, 1323 OCFS2_JOURNAL_ACCESS_WRITE); 1324 if (status < 0) { 1325 mlog_errno(status); 1326 goto bail; 1327 } 1328 new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno); 1329 new_de->file_type = old_de->file_type; 1330 new_dir->i_version++; 1331 status = ocfs2_journal_dirty(handle, new_de_bh); 1332 if (status < 0) { 1333 mlog_errno(status); 1334 goto bail; 1335 } 1336 1337 if (S_ISDIR(new_inode->i_mode)) 1338 newfe->i_links_count = 0; 1339 else 1340 le16_add_cpu(&newfe->i_links_count, -1); 1341 1342 status = ocfs2_journal_dirty(handle, newfe_bh); 1343 if (status < 0) { 1344 mlog_errno(status); 1345 goto bail; 1346 } 1347 } else { 1348 /* if the name was not found in new_dir, add it now */ 1349 status = ocfs2_add_entry(handle, new_dentry, old_inode, 1350 OCFS2_I(old_inode)->ip_blkno, 1351 new_dir_bh, insert_entry_bh); 1352 } 1353 1354 old_inode->i_ctime = CURRENT_TIME; 1355 mark_inode_dirty(old_inode); 1356 1357 /* now that the name has been added to new_dir, remove the old name */ 1358 status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); 1359 if (status < 0) { 1360 mlog_errno(status); 1361 goto bail; 1362 } 1363 1364 if (new_inode) { 1365 new_inode->i_nlink--; 1366 new_inode->i_ctime = CURRENT_TIME; 1367 } 1368 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; 1369 if (old_inode_de_bh) { 1370 status = ocfs2_journal_access(handle, old_inode, 1371 old_inode_de_bh, 1372 OCFS2_JOURNAL_ACCESS_WRITE); 1373 PARENT_INO(old_inode_de_bh->b_data) = 1374 cpu_to_le64(OCFS2_I(new_dir)->ip_blkno); 1375 status = ocfs2_journal_dirty(handle, old_inode_de_bh); 1376 old_dir->i_nlink--; 1377 if (new_inode) { 1378 new_inode->i_nlink--; 1379 } else { 1380 inc_nlink(new_dir); 1381 mark_inode_dirty(new_dir); 1382 } 1383 } 1384 mark_inode_dirty(old_dir); 1385 if (new_inode) 1386 mark_inode_dirty(new_inode); 1387 1388 if (old_dir != new_dir) 1389 if (new_dir_nlink != new_dir->i_nlink) { 1390 if (!new_dir_bh) { 1391 mlog(ML_ERROR, "need to change nlink for new " 1392 "dir %llu from %d to %d but bh is NULL\n", 1393 (unsigned long long)OCFS2_I(new_dir)->ip_blkno, 1394 (int)new_dir_nlink, new_dir->i_nlink); 1395 } else { 1396 struct ocfs2_dinode *fe; 1397 status = ocfs2_journal_access(handle, 1398 new_dir, 1399 new_dir_bh, 1400 OCFS2_JOURNAL_ACCESS_WRITE); 1401 fe = (struct ocfs2_dinode *) new_dir_bh->b_data; 1402 fe->i_links_count = cpu_to_le16(new_dir->i_nlink); 1403 status = ocfs2_journal_dirty(handle, new_dir_bh); 1404 } 1405 } 1406 1407 if (old_dir_nlink != old_dir->i_nlink) { 1408 if (!old_dir_bh) { 1409 mlog(ML_ERROR, "need to change nlink for old dir " 1410 "%llu from %d to %d but bh is NULL!\n", 1411 (unsigned long long)OCFS2_I(old_dir)->ip_blkno, 1412 (int)old_dir_nlink, old_dir->i_nlink); 1413 } else { 1414 struct ocfs2_dinode *fe; 1415 status = ocfs2_journal_access(handle, old_dir, 1416 old_dir_bh, 1417 OCFS2_JOURNAL_ACCESS_WRITE); 1418 fe = (struct ocfs2_dinode *) old_dir_bh->b_data; 1419 fe->i_links_count = cpu_to_le16(old_dir->i_nlink); 1420 status = ocfs2_journal_dirty(handle, old_dir_bh); 1421 } 1422 } 1423 1424 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); 1425 status = 0; 1426 bail: 1427 if (rename_lock) 1428 ocfs2_rename_unlock(osb); 1429 1430 if (handle) 1431 ocfs2_commit_trans(osb, handle); 1432 1433 if (parents_locked) 1434 ocfs2_double_unlock(old_dir, new_dir); 1435 1436 if (old_child_locked) 1437 ocfs2_meta_unlock(old_inode, 1); 1438 1439 if (new_child_locked) 1440 ocfs2_meta_unlock(new_inode, 1); 1441 1442 if (orphan_dir) { 1443 /* This was locked for us in ocfs2_prepare_orphan_dir() */ 1444 ocfs2_meta_unlock(orphan_dir, 1); 1445 mutex_unlock(&orphan_dir->i_mutex); 1446 iput(orphan_dir); 1447 } 1448 1449 if (new_inode) 1450 sync_mapping_buffers(old_inode->i_mapping); 1451 1452 if (new_inode) 1453 iput(new_inode); 1454 if (newfe_bh) 1455 brelse(newfe_bh); 1456 if (old_dir_bh) 1457 brelse(old_dir_bh); 1458 if (new_dir_bh) 1459 brelse(new_dir_bh); 1460 if (new_de_bh) 1461 brelse(new_de_bh); 1462 if (old_de_bh) 1463 brelse(old_de_bh); 1464 if (old_inode_de_bh) 1465 brelse(old_inode_de_bh); 1466 if (orphan_entry_bh) 1467 brelse(orphan_entry_bh); 1468 if (insert_entry_bh) 1469 brelse(insert_entry_bh); 1470 1471 mlog_exit(status); 1472 1473 return status; 1474 } 1475 1476 /* 1477 * we expect i_size = strlen(symname). Copy symname into the file 1478 * data, including the null terminator. 1479 */ 1480 static int ocfs2_create_symlink_data(struct ocfs2_super *osb, 1481 handle_t *handle, 1482 struct inode *inode, 1483 const char *symname) 1484 { 1485 struct buffer_head **bhs = NULL; 1486 const char *c; 1487 struct super_block *sb = osb->sb; 1488 u64 p_blkno; 1489 int p_blocks; 1490 int virtual, blocks, status, i, bytes_left; 1491 1492 bytes_left = i_size_read(inode) + 1; 1493 /* we can't trust i_blocks because we're actually going to 1494 * write i_size + 1 bytes. */ 1495 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; 1496 1497 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", 1498 (unsigned long long)inode->i_blocks, 1499 i_size_read(inode), blocks); 1500 1501 /* Sanity check -- make sure we're going to fit. */ 1502 if (bytes_left > 1503 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { 1504 status = -EIO; 1505 mlog_errno(status); 1506 goto bail; 1507 } 1508 1509 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); 1510 if (!bhs) { 1511 status = -ENOMEM; 1512 mlog_errno(status); 1513 goto bail; 1514 } 1515 1516 status = ocfs2_extent_map_get_blocks(inode, 0, 1, &p_blkno, 1517 &p_blocks); 1518 if (status < 0) { 1519 mlog_errno(status); 1520 goto bail; 1521 } 1522 1523 /* links can never be larger than one cluster so we know this 1524 * is all going to be contiguous, but do a sanity check 1525 * anyway. */ 1526 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { 1527 status = -EIO; 1528 mlog_errno(status); 1529 goto bail; 1530 } 1531 1532 virtual = 0; 1533 while(bytes_left > 0) { 1534 c = &symname[virtual * sb->s_blocksize]; 1535 1536 bhs[virtual] = sb_getblk(sb, p_blkno); 1537 if (!bhs[virtual]) { 1538 status = -ENOMEM; 1539 mlog_errno(status); 1540 goto bail; 1541 } 1542 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]); 1543 1544 status = ocfs2_journal_access(handle, inode, bhs[virtual], 1545 OCFS2_JOURNAL_ACCESS_CREATE); 1546 if (status < 0) { 1547 mlog_errno(status); 1548 goto bail; 1549 } 1550 1551 memset(bhs[virtual]->b_data, 0, sb->s_blocksize); 1552 1553 memcpy(bhs[virtual]->b_data, c, 1554 (bytes_left > sb->s_blocksize) ? sb->s_blocksize : 1555 bytes_left); 1556 1557 status = ocfs2_journal_dirty(handle, bhs[virtual]); 1558 if (status < 0) { 1559 mlog_errno(status); 1560 goto bail; 1561 } 1562 1563 virtual++; 1564 p_blkno++; 1565 bytes_left -= sb->s_blocksize; 1566 } 1567 1568 status = 0; 1569 bail: 1570 1571 if (bhs) { 1572 for(i = 0; i < blocks; i++) 1573 if (bhs[i]) 1574 brelse(bhs[i]); 1575 kfree(bhs); 1576 } 1577 1578 mlog_exit(status); 1579 return status; 1580 } 1581 1582 static int ocfs2_symlink(struct inode *dir, 1583 struct dentry *dentry, 1584 const char *symname) 1585 { 1586 int status, l, credits; 1587 u64 newsize; 1588 struct ocfs2_super *osb = NULL; 1589 struct inode *inode = NULL; 1590 struct super_block *sb; 1591 struct buffer_head *new_fe_bh = NULL; 1592 struct buffer_head *de_bh = NULL; 1593 struct buffer_head *parent_fe_bh = NULL; 1594 struct ocfs2_dinode *fe = NULL; 1595 struct ocfs2_dinode *dirfe; 1596 handle_t *handle = NULL; 1597 struct ocfs2_alloc_context *inode_ac = NULL; 1598 struct ocfs2_alloc_context *data_ac = NULL; 1599 1600 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, 1601 dentry, symname, dentry->d_name.len, dentry->d_name.name); 1602 1603 sb = dir->i_sb; 1604 osb = OCFS2_SB(sb); 1605 1606 l = strlen(symname) + 1; 1607 1608 credits = ocfs2_calc_symlink_credits(sb); 1609 1610 /* lock the parent directory */ 1611 status = ocfs2_meta_lock(dir, &parent_fe_bh, 1); 1612 if (status < 0) { 1613 if (status != -ENOENT) 1614 mlog_errno(status); 1615 return status; 1616 } 1617 1618 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; 1619 if (!dirfe->i_links_count) { 1620 /* can't make a file in a deleted directory. */ 1621 status = -ENOENT; 1622 goto bail; 1623 } 1624 1625 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, 1626 dentry->d_name.len); 1627 if (status) 1628 goto bail; 1629 1630 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, 1631 dentry->d_name.name, 1632 dentry->d_name.len, &de_bh); 1633 if (status < 0) { 1634 mlog_errno(status); 1635 goto bail; 1636 } 1637 1638 status = ocfs2_reserve_new_inode(osb, &inode_ac); 1639 if (status < 0) { 1640 if (status != -ENOSPC) 1641 mlog_errno(status); 1642 goto bail; 1643 } 1644 1645 /* don't reserve bitmap space for fast symlinks. */ 1646 if (l > ocfs2_fast_symlink_chars(sb)) { 1647 status = ocfs2_reserve_clusters(osb, 1, &data_ac); 1648 if (status < 0) { 1649 if (status != -ENOSPC) 1650 mlog_errno(status); 1651 goto bail; 1652 } 1653 } 1654 1655 handle = ocfs2_start_trans(osb, credits); 1656 if (IS_ERR(handle)) { 1657 status = PTR_ERR(handle); 1658 handle = NULL; 1659 mlog_errno(status); 1660 goto bail; 1661 } 1662 1663 status = ocfs2_mknod_locked(osb, dir, dentry, 1664 S_IFLNK | S_IRWXUGO, 0, 1665 &new_fe_bh, parent_fe_bh, handle, 1666 &inode, inode_ac); 1667 if (status < 0) { 1668 mlog_errno(status); 1669 goto bail; 1670 } 1671 1672 fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 1673 inode->i_rdev = 0; 1674 newsize = l - 1; 1675 if (l > ocfs2_fast_symlink_chars(sb)) { 1676 inode->i_op = &ocfs2_symlink_inode_operations; 1677 status = ocfs2_do_extend_allocation(osb, inode, 1, new_fe_bh, 1678 handle, data_ac, NULL, 1679 NULL); 1680 if (status < 0) { 1681 if (status != -ENOSPC && status != -EINTR) { 1682 mlog(ML_ERROR, 1683 "Failed to extend file to %llu\n", 1684 (unsigned long long)newsize); 1685 mlog_errno(status); 1686 status = -ENOSPC; 1687 } 1688 goto bail; 1689 } 1690 i_size_write(inode, newsize); 1691 inode->i_blocks = ocfs2_align_bytes_to_sectors(newsize); 1692 } else { 1693 inode->i_op = &ocfs2_fast_symlink_inode_operations; 1694 memcpy((char *) fe->id2.i_symlink, symname, l); 1695 i_size_write(inode, newsize); 1696 inode->i_blocks = 0; 1697 } 1698 1699 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); 1700 if (status < 0) { 1701 mlog_errno(status); 1702 goto bail; 1703 } 1704 1705 if (!ocfs2_inode_is_fast_symlink(inode)) { 1706 status = ocfs2_create_symlink_data(osb, handle, inode, 1707 symname); 1708 if (status < 0) { 1709 mlog_errno(status); 1710 goto bail; 1711 } 1712 } 1713 1714 status = ocfs2_add_entry(handle, dentry, inode, 1715 le64_to_cpu(fe->i_blkno), parent_fe_bh, 1716 de_bh); 1717 if (status < 0) { 1718 mlog_errno(status); 1719 goto bail; 1720 } 1721 1722 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); 1723 if (status) { 1724 mlog_errno(status); 1725 goto bail; 1726 } 1727 1728 insert_inode_hash(inode); 1729 dentry->d_op = &ocfs2_dentry_ops; 1730 d_instantiate(dentry, inode); 1731 bail: 1732 if (handle) 1733 ocfs2_commit_trans(osb, handle); 1734 1735 ocfs2_meta_unlock(dir, 1); 1736 1737 if (new_fe_bh) 1738 brelse(new_fe_bh); 1739 if (parent_fe_bh) 1740 brelse(parent_fe_bh); 1741 if (de_bh) 1742 brelse(de_bh); 1743 if (inode_ac) 1744 ocfs2_free_alloc_context(inode_ac); 1745 if (data_ac) 1746 ocfs2_free_alloc_context(data_ac); 1747 if ((status < 0) && inode) 1748 iput(inode); 1749 1750 mlog_exit(status); 1751 1752 return status; 1753 } 1754 1755 int ocfs2_check_dir_entry(struct inode * dir, 1756 struct ocfs2_dir_entry * de, 1757 struct buffer_head * bh, 1758 unsigned long offset) 1759 { 1760 const char *error_msg = NULL; 1761 const int rlen = le16_to_cpu(de->rec_len); 1762 1763 if (rlen < OCFS2_DIR_REC_LEN(1)) 1764 error_msg = "rec_len is smaller than minimal"; 1765 else if (rlen % 4 != 0) 1766 error_msg = "rec_len % 4 != 0"; 1767 else if (rlen < OCFS2_DIR_REC_LEN(de->name_len)) 1768 error_msg = "rec_len is too small for name_len"; 1769 else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize) 1770 error_msg = "directory entry across blocks"; 1771 1772 if (error_msg != NULL) 1773 mlog(ML_ERROR, "bad entry in directory #%llu: %s - " 1774 "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n", 1775 (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg, 1776 offset, (unsigned long long)le64_to_cpu(de->inode), rlen, 1777 de->name_len); 1778 return error_msg == NULL ? 1 : 0; 1779 } 1780 1781 /* we don't always have a dentry for what we want to add, so people 1782 * like orphan dir can call this instead. 1783 * 1784 * If you pass me insert_bh, I'll skip the search of the other dir 1785 * blocks and put the record in there. 1786 */ 1787 static int __ocfs2_add_entry(handle_t *handle, 1788 struct inode *dir, 1789 const char *name, int namelen, 1790 struct inode *inode, u64 blkno, 1791 struct buffer_head *parent_fe_bh, 1792 struct buffer_head *insert_bh) 1793 { 1794 unsigned long offset; 1795 unsigned short rec_len; 1796 struct ocfs2_dir_entry *de, *de1; 1797 struct super_block *sb; 1798 int retval, status; 1799 1800 mlog_entry_void(); 1801 1802 sb = dir->i_sb; 1803 1804 if (!namelen) 1805 return -EINVAL; 1806 1807 rec_len = OCFS2_DIR_REC_LEN(namelen); 1808 offset = 0; 1809 de = (struct ocfs2_dir_entry *) insert_bh->b_data; 1810 while (1) { 1811 BUG_ON((char *)de >= sb->s_blocksize + insert_bh->b_data); 1812 /* These checks should've already been passed by the 1813 * prepare function, but I guess we can leave them 1814 * here anyway. */ 1815 if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) { 1816 retval = -ENOENT; 1817 goto bail; 1818 } 1819 if (ocfs2_match(namelen, name, de)) { 1820 retval = -EEXIST; 1821 goto bail; 1822 } 1823 if (((le64_to_cpu(de->inode) == 0) && 1824 (le16_to_cpu(de->rec_len) >= rec_len)) || 1825 (le16_to_cpu(de->rec_len) >= 1826 (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) { 1827 status = ocfs2_journal_access(handle, dir, insert_bh, 1828 OCFS2_JOURNAL_ACCESS_WRITE); 1829 /* By now the buffer is marked for journaling */ 1830 offset += le16_to_cpu(de->rec_len); 1831 if (le64_to_cpu(de->inode)) { 1832 de1 = (struct ocfs2_dir_entry *)((char *) de + 1833 OCFS2_DIR_REC_LEN(de->name_len)); 1834 de1->rec_len = 1835 cpu_to_le16(le16_to_cpu(de->rec_len) - 1836 OCFS2_DIR_REC_LEN(de->name_len)); 1837 de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); 1838 de = de1; 1839 } 1840 de->file_type = OCFS2_FT_UNKNOWN; 1841 if (blkno) { 1842 de->inode = cpu_to_le64(blkno); 1843 ocfs2_set_de_type(de, inode->i_mode); 1844 } else 1845 de->inode = 0; 1846 de->name_len = namelen; 1847 memcpy(de->name, name, namelen); 1848 1849 dir->i_mtime = dir->i_ctime = CURRENT_TIME; 1850 dir->i_version++; 1851 status = ocfs2_journal_dirty(handle, insert_bh); 1852 retval = 0; 1853 goto bail; 1854 } 1855 offset += le16_to_cpu(de->rec_len); 1856 de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len)); 1857 } 1858 1859 /* when you think about it, the assert above should prevent us 1860 * from ever getting here. */ 1861 retval = -ENOSPC; 1862 bail: 1863 1864 mlog_exit(retval); 1865 return retval; 1866 } 1867 1868 1869 /* 1870 * ocfs2_delete_entry deletes a directory entry by merging it with the 1871 * previous entry 1872 */ 1873 static int ocfs2_delete_entry(handle_t *handle, 1874 struct inode *dir, 1875 struct ocfs2_dir_entry *de_del, 1876 struct buffer_head *bh) 1877 { 1878 struct ocfs2_dir_entry *de, *pde; 1879 int i, status = -ENOENT; 1880 1881 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh); 1882 1883 i = 0; 1884 pde = NULL; 1885 de = (struct ocfs2_dir_entry *) bh->b_data; 1886 while (i < bh->b_size) { 1887 if (!ocfs2_check_dir_entry(dir, de, bh, i)) { 1888 status = -EIO; 1889 mlog_errno(status); 1890 goto bail; 1891 } 1892 if (de == de_del) { 1893 status = ocfs2_journal_access(handle, dir, bh, 1894 OCFS2_JOURNAL_ACCESS_WRITE); 1895 if (status < 0) { 1896 status = -EIO; 1897 mlog_errno(status); 1898 goto bail; 1899 } 1900 if (pde) 1901 pde->rec_len = 1902 cpu_to_le16(le16_to_cpu(pde->rec_len) + 1903 le16_to_cpu(de->rec_len)); 1904 else 1905 de->inode = 0; 1906 dir->i_version++; 1907 status = ocfs2_journal_dirty(handle, bh); 1908 goto bail; 1909 } 1910 i += le16_to_cpu(de->rec_len); 1911 pde = de; 1912 de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len)); 1913 } 1914 bail: 1915 mlog_exit(status); 1916 return status; 1917 } 1918 1919 /* 1920 * Returns 0 if not found, -1 on failure, and 1 on success 1921 */ 1922 static int inline ocfs2_search_dirblock(struct buffer_head *bh, 1923 struct inode *dir, 1924 const char *name, int namelen, 1925 unsigned long offset, 1926 struct ocfs2_dir_entry **res_dir) 1927 { 1928 struct ocfs2_dir_entry *de; 1929 char *dlimit, *de_buf; 1930 int de_len; 1931 int ret = 0; 1932 1933 mlog_entry_void(); 1934 1935 de_buf = bh->b_data; 1936 dlimit = de_buf + dir->i_sb->s_blocksize; 1937 1938 while (de_buf < dlimit) { 1939 /* this code is executed quadratically often */ 1940 /* do minimal checking `by hand' */ 1941 1942 de = (struct ocfs2_dir_entry *) de_buf; 1943 1944 if (de_buf + namelen <= dlimit && 1945 ocfs2_match(namelen, name, de)) { 1946 /* found a match - just to be sure, do a full check */ 1947 if (!ocfs2_check_dir_entry(dir, de, bh, offset)) { 1948 ret = -1; 1949 goto bail; 1950 } 1951 *res_dir = de; 1952 ret = 1; 1953 goto bail; 1954 } 1955 1956 /* prevent looping on a bad block */ 1957 de_len = le16_to_cpu(de->rec_len); 1958 if (de_len <= 0) { 1959 ret = -1; 1960 goto bail; 1961 } 1962 1963 de_buf += de_len; 1964 offset += de_len; 1965 } 1966 1967 bail: 1968 mlog_exit(ret); 1969 return ret; 1970 } 1971 1972 struct buffer_head *ocfs2_find_entry(const char *name, int namelen, 1973 struct inode *dir, 1974 struct ocfs2_dir_entry **res_dir) 1975 { 1976 struct super_block *sb; 1977 struct buffer_head *bh_use[NAMEI_RA_SIZE]; 1978 struct buffer_head *bh, *ret = NULL; 1979 unsigned long start, block, b; 1980 int ra_max = 0; /* Number of bh's in the readahead 1981 buffer, bh_use[] */ 1982 int ra_ptr = 0; /* Current index into readahead 1983 buffer */ 1984 int num = 0; 1985 int nblocks, i, err; 1986 1987 mlog_entry_void(); 1988 1989 *res_dir = NULL; 1990 sb = dir->i_sb; 1991 1992 nblocks = i_size_read(dir) >> sb->s_blocksize_bits; 1993 start = OCFS2_I(dir)->ip_dir_start_lookup; 1994 if (start >= nblocks) 1995 start = 0; 1996 block = start; 1997 1998 restart: 1999 do { 2000 /* 2001 * We deal with the read-ahead logic here. 2002 */ 2003 if (ra_ptr >= ra_max) { 2004 /* Refill the readahead buffer */ 2005 ra_ptr = 0; 2006 b = block; 2007 for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) { 2008 /* 2009 * Terminate if we reach the end of the 2010 * directory and must wrap, or if our 2011 * search has finished at this block. 2012 */ 2013 if (b >= nblocks || (num && block == start)) { 2014 bh_use[ra_max] = NULL; 2015 break; 2016 } 2017 num++; 2018 2019 bh = ocfs2_bread(dir, b++, &err, 1); 2020 bh_use[ra_max] = bh; 2021 } 2022 } 2023 if ((bh = bh_use[ra_ptr++]) == NULL) 2024 goto next; 2025 wait_on_buffer(bh); 2026 if (!buffer_uptodate(bh)) { 2027 /* read error, skip block & hope for the best */ 2028 ocfs2_error(dir->i_sb, "reading directory %llu, " 2029 "offset %lu\n", 2030 (unsigned long long)OCFS2_I(dir)->ip_blkno, 2031 block); 2032 brelse(bh); 2033 goto next; 2034 } 2035 i = ocfs2_search_dirblock(bh, dir, name, namelen, 2036 block << sb->s_blocksize_bits, 2037 res_dir); 2038 if (i == 1) { 2039 OCFS2_I(dir)->ip_dir_start_lookup = block; 2040 ret = bh; 2041 goto cleanup_and_exit; 2042 } else { 2043 brelse(bh); 2044 if (i < 0) 2045 goto cleanup_and_exit; 2046 } 2047 next: 2048 if (++block >= nblocks) 2049 block = 0; 2050 } while (block != start); 2051 2052 /* 2053 * If the directory has grown while we were searching, then 2054 * search the last part of the directory before giving up. 2055 */ 2056 block = nblocks; 2057 nblocks = i_size_read(dir) >> sb->s_blocksize_bits; 2058 if (block < nblocks) { 2059 start = 0; 2060 goto restart; 2061 } 2062 2063 cleanup_and_exit: 2064 /* Clean up the read-ahead blocks */ 2065 for (; ra_ptr < ra_max; ra_ptr++) 2066 brelse(bh_use[ra_ptr]); 2067 2068 mlog_exit_ptr(ret); 2069 return ret; 2070 } 2071 2072 static int ocfs2_blkno_stringify(u64 blkno, char *name) 2073 { 2074 int status, namelen; 2075 2076 mlog_entry_void(); 2077 2078 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", 2079 (long long)blkno); 2080 if (namelen <= 0) { 2081 if (namelen) 2082 status = namelen; 2083 else 2084 status = -EINVAL; 2085 mlog_errno(status); 2086 goto bail; 2087 } 2088 if (namelen != OCFS2_ORPHAN_NAMELEN) { 2089 status = -EINVAL; 2090 mlog_errno(status); 2091 goto bail; 2092 } 2093 2094 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, 2095 namelen); 2096 2097 status = 0; 2098 bail: 2099 mlog_exit(status); 2100 return status; 2101 } 2102 2103 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, 2104 struct inode **ret_orphan_dir, 2105 struct inode *inode, 2106 char *name, 2107 struct buffer_head **de_bh) 2108 { 2109 struct inode *orphan_dir_inode; 2110 struct buffer_head *orphan_dir_bh = NULL; 2111 int status = 0; 2112 2113 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2114 if (status < 0) { 2115 mlog_errno(status); 2116 return status; 2117 } 2118 2119 orphan_dir_inode = ocfs2_get_system_file_inode(osb, 2120 ORPHAN_DIR_SYSTEM_INODE, 2121 osb->slot_num); 2122 if (!orphan_dir_inode) { 2123 status = -ENOENT; 2124 mlog_errno(status); 2125 return status; 2126 } 2127 2128 mutex_lock(&orphan_dir_inode->i_mutex); 2129 2130 status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1); 2131 if (status < 0) { 2132 mlog_errno(status); 2133 goto leave; 2134 } 2135 2136 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, 2137 orphan_dir_bh, name, 2138 OCFS2_ORPHAN_NAMELEN, de_bh); 2139 if (status < 0) { 2140 ocfs2_meta_unlock(orphan_dir_inode, 1); 2141 2142 mlog_errno(status); 2143 goto leave; 2144 } 2145 2146 *ret_orphan_dir = orphan_dir_inode; 2147 2148 leave: 2149 if (status) { 2150 mutex_unlock(&orphan_dir_inode->i_mutex); 2151 iput(orphan_dir_inode); 2152 } 2153 2154 if (orphan_dir_bh) 2155 brelse(orphan_dir_bh); 2156 2157 mlog_exit(status); 2158 return status; 2159 } 2160 2161 static int ocfs2_orphan_add(struct ocfs2_super *osb, 2162 handle_t *handle, 2163 struct inode *inode, 2164 struct ocfs2_dinode *fe, 2165 char *name, 2166 struct buffer_head *de_bh, 2167 struct inode *orphan_dir_inode) 2168 { 2169 struct buffer_head *orphan_dir_bh = NULL; 2170 int status = 0; 2171 struct ocfs2_dinode *orphan_fe; 2172 2173 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); 2174 2175 status = ocfs2_read_block(osb, 2176 OCFS2_I(orphan_dir_inode)->ip_blkno, 2177 &orphan_dir_bh, OCFS2_BH_CACHED, 2178 orphan_dir_inode); 2179 if (status < 0) { 2180 mlog_errno(status); 2181 goto leave; 2182 } 2183 2184 status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, 2185 OCFS2_JOURNAL_ACCESS_WRITE); 2186 if (status < 0) { 2187 mlog_errno(status); 2188 goto leave; 2189 } 2190 2191 /* we're a cluster, and nlink can change on disk from 2192 * underneath us... */ 2193 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2194 if (S_ISDIR(inode->i_mode)) 2195 le16_add_cpu(&orphan_fe->i_links_count, 1); 2196 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); 2197 2198 status = ocfs2_journal_dirty(handle, orphan_dir_bh); 2199 if (status < 0) { 2200 mlog_errno(status); 2201 goto leave; 2202 } 2203 2204 status = __ocfs2_add_entry(handle, orphan_dir_inode, name, 2205 OCFS2_ORPHAN_NAMELEN, inode, 2206 OCFS2_I(inode)->ip_blkno, 2207 orphan_dir_bh, de_bh); 2208 if (status < 0) { 2209 mlog_errno(status); 2210 goto leave; 2211 } 2212 2213 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); 2214 2215 /* Record which orphan dir our inode now resides 2216 * in. delete_inode will use this to determine which orphan 2217 * dir to lock. */ 2218 spin_lock(&OCFS2_I(inode)->ip_lock); 2219 OCFS2_I(inode)->ip_orphaned_slot = osb->slot_num; 2220 spin_unlock(&OCFS2_I(inode)->ip_lock); 2221 2222 mlog(0, "Inode %llu orphaned in slot %d\n", 2223 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); 2224 2225 leave: 2226 if (orphan_dir_bh) 2227 brelse(orphan_dir_bh); 2228 2229 mlog_exit(status); 2230 return status; 2231 } 2232 2233 /* unlike orphan_add, we expect the orphan dir to already be locked here. */ 2234 int ocfs2_orphan_del(struct ocfs2_super *osb, 2235 handle_t *handle, 2236 struct inode *orphan_dir_inode, 2237 struct inode *inode, 2238 struct buffer_head *orphan_dir_bh) 2239 { 2240 char name[OCFS2_ORPHAN_NAMELEN + 1]; 2241 struct ocfs2_dinode *orphan_fe; 2242 int status = 0; 2243 struct buffer_head *target_de_bh = NULL; 2244 struct ocfs2_dir_entry *target_de = NULL; 2245 2246 mlog_entry_void(); 2247 2248 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); 2249 if (status < 0) { 2250 mlog_errno(status); 2251 goto leave; 2252 } 2253 2254 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", 2255 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, 2256 OCFS2_ORPHAN_NAMELEN); 2257 2258 /* find it's spot in the orphan directory */ 2259 target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, 2260 orphan_dir_inode, &target_de); 2261 if (!target_de_bh) { 2262 status = -ENOENT; 2263 mlog_errno(status); 2264 goto leave; 2265 } 2266 2267 /* remove it from the orphan directory */ 2268 status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, 2269 target_de_bh); 2270 if (status < 0) { 2271 mlog_errno(status); 2272 goto leave; 2273 } 2274 2275 status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, 2276 OCFS2_JOURNAL_ACCESS_WRITE); 2277 if (status < 0) { 2278 mlog_errno(status); 2279 goto leave; 2280 } 2281 2282 /* do the i_nlink dance! :) */ 2283 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; 2284 if (S_ISDIR(inode->i_mode)) 2285 le16_add_cpu(&orphan_fe->i_links_count, -1); 2286 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); 2287 2288 status = ocfs2_journal_dirty(handle, orphan_dir_bh); 2289 if (status < 0) { 2290 mlog_errno(status); 2291 goto leave; 2292 } 2293 2294 leave: 2295 if (target_de_bh) 2296 brelse(target_de_bh); 2297 2298 mlog_exit(status); 2299 return status; 2300 } 2301 2302 struct inode_operations ocfs2_dir_iops = { 2303 .create = ocfs2_create, 2304 .lookup = ocfs2_lookup, 2305 .link = ocfs2_link, 2306 .unlink = ocfs2_unlink, 2307 .rmdir = ocfs2_unlink, 2308 .symlink = ocfs2_symlink, 2309 .mkdir = ocfs2_mkdir, 2310 .mknod = ocfs2_mknod, 2311 .rename = ocfs2_rename, 2312 .setattr = ocfs2_setattr, 2313 .getattr = ocfs2_getattr, 2314 .permission = ocfs2_permission, 2315 }; 2316