| 1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 3 | * |
| 4 | * namei.c |
| 5 | * |
| 6 | * Create and rename file, directory, symlinks |
| 7 | * |
| 8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| 9 | * |
| 10 | * Portions of this code from linux/fs/ext3/dir.c |
| 11 | * |
| 12 | * Copyright (C) 1992, 1993, 1994, 1995 |
| 13 | * Remy Card (card@masi.ibp.fr) |
| 14 | * Laboratoire MASI - Institut Blaise pascal |
| 15 | * Universite Pierre et Marie Curie (Paris VI) |
| 16 | * |
| 17 | * from |
| 18 | * |
| 19 | * linux/fs/minix/dir.c |
| 20 | * |
| 21 | * Copyright (C) 1991, 1992 Linux Torvalds |
| 22 | * |
| 23 | * This program is free software; you can redistribute it and/or |
| 24 | * modify it under the terms of the GNU General Public |
| 25 | * License as published by the Free Software Foundation; either |
| 26 | * version 2 of the License, or (at your option) any later version. |
| 27 | * |
| 28 | * This program is distributed in the hope that it will be useful, |
| 29 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 30 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 31 | * General Public License for more details. |
| 32 | * |
| 33 | * You should have received a copy of the GNU General Public |
| 34 | * License along with this program; if not, write to the |
| 35 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 36 | * Boston, MA 021110-1307, USA. |
| 37 | */ |
| 38 | |
| 39 | #include <linux/fs.h> |
| 40 | #include <linux/types.h> |
| 41 | #include <linux/slab.h> |
| 42 | #include <linux/highmem.h> |
| 43 | #include <linux/quotaops.h> |
| 44 | |
| 45 | #include <cluster/masklog.h> |
| 46 | |
| 47 | #include "ocfs2.h" |
| 48 | |
| 49 | #include "alloc.h" |
| 50 | #include "dcache.h" |
| 51 | #include "dir.h" |
| 52 | #include "dlmglue.h" |
| 53 | #include "extent_map.h" |
| 54 | #include "file.h" |
| 55 | #include "inode.h" |
| 56 | #include "journal.h" |
| 57 | #include "namei.h" |
| 58 | #include "suballoc.h" |
| 59 | #include "super.h" |
| 60 | #include "symlink.h" |
| 61 | #include "sysfile.h" |
| 62 | #include "uptodate.h" |
| 63 | #include "xattr.h" |
| 64 | #include "acl.h" |
| 65 | #include "ocfs2_trace.h" |
| 66 | |
| 67 | #include "buffer_head_io.h" |
| 68 | |
| 69 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, |
| 70 | struct inode *dir, |
| 71 | struct inode *inode, |
| 72 | dev_t dev, |
| 73 | struct buffer_head **new_fe_bh, |
| 74 | struct buffer_head *parent_fe_bh, |
| 75 | handle_t *handle, |
| 76 | struct ocfs2_alloc_context *inode_ac); |
| 77 | |
| 78 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, |
| 79 | struct inode **ret_orphan_dir, |
| 80 | u64 blkno, |
| 81 | char *name, |
| 82 | struct ocfs2_dir_lookup_result *lookup); |
| 83 | |
| 84 | static int ocfs2_orphan_add(struct ocfs2_super *osb, |
| 85 | handle_t *handle, |
| 86 | struct inode *inode, |
| 87 | struct buffer_head *fe_bh, |
| 88 | char *name, |
| 89 | struct ocfs2_dir_lookup_result *lookup, |
| 90 | struct inode *orphan_dir_inode); |
| 91 | |
| 92 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, |
| 93 | handle_t *handle, |
| 94 | struct inode *inode, |
| 95 | const char *symname); |
| 96 | |
| 97 | /* An orphan dir name is an 8 byte value, printed as a hex string */ |
| 98 | #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64))) |
| 99 | |
| 100 | static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, |
| 101 | struct nameidata *nd) |
| 102 | { |
| 103 | int status; |
| 104 | u64 blkno; |
| 105 | struct inode *inode = NULL; |
| 106 | struct dentry *ret; |
| 107 | struct ocfs2_inode_info *oi; |
| 108 | |
| 109 | trace_ocfs2_lookup(dir, dentry, dentry->d_name.len, |
| 110 | dentry->d_name.name, |
| 111 | (unsigned long long)OCFS2_I(dir)->ip_blkno, 0); |
| 112 | |
| 113 | if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { |
| 114 | ret = ERR_PTR(-ENAMETOOLONG); |
| 115 | goto bail; |
| 116 | } |
| 117 | |
| 118 | status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT); |
| 119 | if (status < 0) { |
| 120 | if (status != -ENOENT) |
| 121 | mlog_errno(status); |
| 122 | ret = ERR_PTR(status); |
| 123 | goto bail; |
| 124 | } |
| 125 | |
| 126 | status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name, |
| 127 | dentry->d_name.len, &blkno); |
| 128 | if (status < 0) |
| 129 | goto bail_add; |
| 130 | |
| 131 | inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0); |
| 132 | if (IS_ERR(inode)) { |
| 133 | ret = ERR_PTR(-EACCES); |
| 134 | goto bail_unlock; |
| 135 | } |
| 136 | |
| 137 | oi = OCFS2_I(inode); |
| 138 | /* Clear any orphaned state... If we were able to look up the |
| 139 | * inode from a directory, it certainly can't be orphaned. We |
| 140 | * might have the bad state from a node which intended to |
| 141 | * orphan this inode but crashed before it could commit the |
| 142 | * unlink. */ |
| 143 | spin_lock(&oi->ip_lock); |
| 144 | oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; |
| 145 | spin_unlock(&oi->ip_lock); |
| 146 | |
| 147 | bail_add: |
| 148 | ret = d_splice_alias(inode, dentry); |
| 149 | |
| 150 | if (inode) { |
| 151 | /* |
| 152 | * If d_splice_alias() finds a DCACHE_DISCONNECTED |
| 153 | * dentry, it will d_move() it on top of ourse. The |
| 154 | * return value will indicate this however, so in |
| 155 | * those cases, we switch them around for the locking |
| 156 | * code. |
| 157 | * |
| 158 | * NOTE: This dentry already has ->d_op set from |
| 159 | * ocfs2_get_parent() and ocfs2_get_dentry() |
| 160 | */ |
| 161 | if (ret) |
| 162 | dentry = ret; |
| 163 | |
| 164 | status = ocfs2_dentry_attach_lock(dentry, inode, |
| 165 | OCFS2_I(dir)->ip_blkno); |
| 166 | if (status) { |
| 167 | mlog_errno(status); |
| 168 | ret = ERR_PTR(status); |
| 169 | goto bail_unlock; |
| 170 | } |
| 171 | } else |
| 172 | ocfs2_dentry_attach_gen(dentry); |
| 173 | |
| 174 | bail_unlock: |
| 175 | /* Don't drop the cluster lock until *after* the d_add -- |
| 176 | * unlink on another node will message us to remove that |
| 177 | * dentry under this lock so otherwise we can race this with |
| 178 | * the downconvert thread and have a stale dentry. */ |
| 179 | ocfs2_inode_unlock(dir, 0); |
| 180 | |
| 181 | bail: |
| 182 | |
| 183 | trace_ocfs2_lookup_ret(ret); |
| 184 | |
| 185 | return ret; |
| 186 | } |
| 187 | |
| 188 | static struct inode *ocfs2_get_init_inode(struct inode *dir, int mode) |
| 189 | { |
| 190 | struct inode *inode; |
| 191 | |
| 192 | inode = new_inode(dir->i_sb); |
| 193 | if (!inode) { |
| 194 | mlog(ML_ERROR, "new_inode failed!\n"); |
| 195 | return NULL; |
| 196 | } |
| 197 | |
| 198 | /* populate as many fields early on as possible - many of |
| 199 | * these are used by the support functions here and in |
| 200 | * callers. */ |
| 201 | if (S_ISDIR(mode)) |
| 202 | inode->i_nlink = 2; |
| 203 | else |
| 204 | inode->i_nlink = 1; |
| 205 | inode_init_owner(inode, dir, mode); |
| 206 | dquot_initialize(inode); |
| 207 | return inode; |
| 208 | } |
| 209 | |
| 210 | static int ocfs2_mknod(struct inode *dir, |
| 211 | struct dentry *dentry, |
| 212 | int mode, |
| 213 | dev_t dev) |
| 214 | { |
| 215 | int status = 0; |
| 216 | struct buffer_head *parent_fe_bh = NULL; |
| 217 | handle_t *handle = NULL; |
| 218 | struct ocfs2_super *osb; |
| 219 | struct ocfs2_dinode *dirfe; |
| 220 | struct buffer_head *new_fe_bh = NULL; |
| 221 | struct inode *inode = NULL; |
| 222 | struct ocfs2_alloc_context *inode_ac = NULL; |
| 223 | struct ocfs2_alloc_context *data_ac = NULL; |
| 224 | struct ocfs2_alloc_context *meta_ac = NULL; |
| 225 | int want_clusters = 0; |
| 226 | int want_meta = 0; |
| 227 | int xattr_credits = 0; |
| 228 | struct ocfs2_security_xattr_info si = { |
| 229 | .enable = 1, |
| 230 | }; |
| 231 | int did_quota_inode = 0; |
| 232 | struct ocfs2_dir_lookup_result lookup = { NULL, }; |
| 233 | sigset_t oldset; |
| 234 | int did_block_signals = 0; |
| 235 | |
| 236 | trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name, |
| 237 | (unsigned long long)OCFS2_I(dir)->ip_blkno, |
| 238 | (unsigned long)dev, mode); |
| 239 | |
| 240 | dquot_initialize(dir); |
| 241 | |
| 242 | /* get our super block */ |
| 243 | osb = OCFS2_SB(dir->i_sb); |
| 244 | |
| 245 | status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); |
| 246 | if (status < 0) { |
| 247 | if (status != -ENOENT) |
| 248 | mlog_errno(status); |
| 249 | return status; |
| 250 | } |
| 251 | |
| 252 | if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) { |
| 253 | status = -EMLINK; |
| 254 | goto leave; |
| 255 | } |
| 256 | |
| 257 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; |
| 258 | if (!ocfs2_read_links_count(dirfe)) { |
| 259 | /* can't make a file in a deleted directory. */ |
| 260 | status = -ENOENT; |
| 261 | goto leave; |
| 262 | } |
| 263 | |
| 264 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
| 265 | dentry->d_name.len); |
| 266 | if (status) |
| 267 | goto leave; |
| 268 | |
| 269 | /* get a spot inside the dir. */ |
| 270 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, |
| 271 | dentry->d_name.name, |
| 272 | dentry->d_name.len, &lookup); |
| 273 | if (status < 0) { |
| 274 | mlog_errno(status); |
| 275 | goto leave; |
| 276 | } |
| 277 | |
| 278 | /* reserve an inode spot */ |
| 279 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
| 280 | if (status < 0) { |
| 281 | if (status != -ENOSPC) |
| 282 | mlog_errno(status); |
| 283 | goto leave; |
| 284 | } |
| 285 | |
| 286 | inode = ocfs2_get_init_inode(dir, mode); |
| 287 | if (!inode) { |
| 288 | status = -ENOMEM; |
| 289 | mlog_errno(status); |
| 290 | goto leave; |
| 291 | } |
| 292 | |
| 293 | /* get security xattr */ |
| 294 | status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); |
| 295 | if (status) { |
| 296 | if (status == -EOPNOTSUPP) |
| 297 | si.enable = 0; |
| 298 | else { |
| 299 | mlog_errno(status); |
| 300 | goto leave; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | /* calculate meta data/clusters for setting security and acl xattr */ |
| 305 | status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode, |
| 306 | &si, &want_clusters, |
| 307 | &xattr_credits, &want_meta); |
| 308 | if (status < 0) { |
| 309 | mlog_errno(status); |
| 310 | goto leave; |
| 311 | } |
| 312 | |
| 313 | /* Reserve a cluster if creating an extent based directory. */ |
| 314 | if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { |
| 315 | want_clusters += 1; |
| 316 | |
| 317 | /* Dir indexing requires extra space as well */ |
| 318 | if (ocfs2_supports_indexed_dirs(osb)) |
| 319 | want_meta++; |
| 320 | } |
| 321 | |
| 322 | status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac); |
| 323 | if (status < 0) { |
| 324 | if (status != -ENOSPC) |
| 325 | mlog_errno(status); |
| 326 | goto leave; |
| 327 | } |
| 328 | |
| 329 | status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); |
| 330 | if (status < 0) { |
| 331 | if (status != -ENOSPC) |
| 332 | mlog_errno(status); |
| 333 | goto leave; |
| 334 | } |
| 335 | |
| 336 | handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, |
| 337 | S_ISDIR(mode), |
| 338 | xattr_credits)); |
| 339 | if (IS_ERR(handle)) { |
| 340 | status = PTR_ERR(handle); |
| 341 | handle = NULL; |
| 342 | mlog_errno(status); |
| 343 | goto leave; |
| 344 | } |
| 345 | |
| 346 | /* Starting to change things, restart is no longer possible. */ |
| 347 | ocfs2_block_signals(&oldset); |
| 348 | did_block_signals = 1; |
| 349 | |
| 350 | status = dquot_alloc_inode(inode); |
| 351 | if (status) |
| 352 | goto leave; |
| 353 | did_quota_inode = 1; |
| 354 | |
| 355 | /* do the real work now. */ |
| 356 | status = ocfs2_mknod_locked(osb, dir, inode, dev, |
| 357 | &new_fe_bh, parent_fe_bh, handle, |
| 358 | inode_ac); |
| 359 | if (status < 0) { |
| 360 | mlog_errno(status); |
| 361 | goto leave; |
| 362 | } |
| 363 | |
| 364 | if (S_ISDIR(mode)) { |
| 365 | status = ocfs2_fill_new_dir(osb, handle, dir, inode, |
| 366 | new_fe_bh, data_ac, meta_ac); |
| 367 | if (status < 0) { |
| 368 | mlog_errno(status); |
| 369 | goto leave; |
| 370 | } |
| 371 | |
| 372 | status = ocfs2_journal_access_di(handle, INODE_CACHE(dir), |
| 373 | parent_fe_bh, |
| 374 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 375 | if (status < 0) { |
| 376 | mlog_errno(status); |
| 377 | goto leave; |
| 378 | } |
| 379 | ocfs2_add_links_count(dirfe, 1); |
| 380 | ocfs2_journal_dirty(handle, parent_fe_bh); |
| 381 | inc_nlink(dir); |
| 382 | } |
| 383 | |
| 384 | status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh, |
| 385 | meta_ac, data_ac); |
| 386 | if (status < 0) { |
| 387 | mlog_errno(status); |
| 388 | goto leave; |
| 389 | } |
| 390 | |
| 391 | if (si.enable) { |
| 392 | status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, |
| 393 | meta_ac, data_ac); |
| 394 | if (status < 0) { |
| 395 | mlog_errno(status); |
| 396 | goto leave; |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | /* |
| 401 | * Do this before adding the entry to the directory. We add |
| 402 | * also set d_op after success so that ->d_iput() will cleanup |
| 403 | * the dentry lock even if ocfs2_add_entry() fails below. |
| 404 | */ |
| 405 | status = ocfs2_dentry_attach_lock(dentry, inode, |
| 406 | OCFS2_I(dir)->ip_blkno); |
| 407 | if (status) { |
| 408 | mlog_errno(status); |
| 409 | goto leave; |
| 410 | } |
| 411 | |
| 412 | status = ocfs2_add_entry(handle, dentry, inode, |
| 413 | OCFS2_I(inode)->ip_blkno, parent_fe_bh, |
| 414 | &lookup); |
| 415 | if (status < 0) { |
| 416 | mlog_errno(status); |
| 417 | goto leave; |
| 418 | } |
| 419 | |
| 420 | insert_inode_hash(inode); |
| 421 | d_instantiate(dentry, inode); |
| 422 | status = 0; |
| 423 | leave: |
| 424 | if (status < 0 && did_quota_inode) |
| 425 | dquot_free_inode(inode); |
| 426 | if (handle) |
| 427 | ocfs2_commit_trans(osb, handle); |
| 428 | |
| 429 | ocfs2_inode_unlock(dir, 1); |
| 430 | if (did_block_signals) |
| 431 | ocfs2_unblock_signals(&oldset); |
| 432 | |
| 433 | brelse(new_fe_bh); |
| 434 | brelse(parent_fe_bh); |
| 435 | kfree(si.name); |
| 436 | kfree(si.value); |
| 437 | |
| 438 | ocfs2_free_dir_lookup_result(&lookup); |
| 439 | |
| 440 | if (inode_ac) |
| 441 | ocfs2_free_alloc_context(inode_ac); |
| 442 | |
| 443 | if (data_ac) |
| 444 | ocfs2_free_alloc_context(data_ac); |
| 445 | |
| 446 | if (meta_ac) |
| 447 | ocfs2_free_alloc_context(meta_ac); |
| 448 | |
| 449 | /* |
| 450 | * We should call iput after the i_mutex of the bitmap been |
| 451 | * unlocked in ocfs2_free_alloc_context, or the |
| 452 | * ocfs2_delete_inode will mutex_lock again. |
| 453 | */ |
| 454 | if ((status < 0) && inode) { |
| 455 | OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; |
| 456 | clear_nlink(inode); |
| 457 | iput(inode); |
| 458 | } |
| 459 | |
| 460 | if (status) |
| 461 | mlog_errno(status); |
| 462 | |
| 463 | return status; |
| 464 | } |
| 465 | |
| 466 | static int __ocfs2_mknod_locked(struct inode *dir, |
| 467 | struct inode *inode, |
| 468 | dev_t dev, |
| 469 | struct buffer_head **new_fe_bh, |
| 470 | struct buffer_head *parent_fe_bh, |
| 471 | handle_t *handle, |
| 472 | struct ocfs2_alloc_context *inode_ac, |
| 473 | u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) |
| 474 | { |
| 475 | int status = 0; |
| 476 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
| 477 | struct ocfs2_dinode *fe = NULL; |
| 478 | struct ocfs2_extent_list *fel; |
| 479 | u16 feat; |
| 480 | |
| 481 | *new_fe_bh = NULL; |
| 482 | |
| 483 | /* populate as many fields early on as possible - many of |
| 484 | * these are used by the support functions here and in |
| 485 | * callers. */ |
| 486 | inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); |
| 487 | OCFS2_I(inode)->ip_blkno = fe_blkno; |
| 488 | spin_lock(&osb->osb_lock); |
| 489 | inode->i_generation = osb->s_next_generation++; |
| 490 | spin_unlock(&osb->osb_lock); |
| 491 | |
| 492 | *new_fe_bh = sb_getblk(osb->sb, fe_blkno); |
| 493 | if (!*new_fe_bh) { |
| 494 | status = -EIO; |
| 495 | mlog_errno(status); |
| 496 | goto leave; |
| 497 | } |
| 498 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh); |
| 499 | |
| 500 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), |
| 501 | *new_fe_bh, |
| 502 | OCFS2_JOURNAL_ACCESS_CREATE); |
| 503 | if (status < 0) { |
| 504 | mlog_errno(status); |
| 505 | goto leave; |
| 506 | } |
| 507 | |
| 508 | fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; |
| 509 | memset(fe, 0, osb->sb->s_blocksize); |
| 510 | |
| 511 | fe->i_generation = cpu_to_le32(inode->i_generation); |
| 512 | fe->i_fs_generation = cpu_to_le32(osb->fs_generation); |
| 513 | fe->i_blkno = cpu_to_le64(fe_blkno); |
| 514 | fe->i_suballoc_loc = cpu_to_le64(suballoc_loc); |
| 515 | fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); |
| 516 | fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot); |
| 517 | fe->i_uid = cpu_to_le32(inode->i_uid); |
| 518 | fe->i_gid = cpu_to_le32(inode->i_gid); |
| 519 | fe->i_mode = cpu_to_le16(inode->i_mode); |
| 520 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) |
| 521 | fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); |
| 522 | |
| 523 | ocfs2_set_links_count(fe, inode->i_nlink); |
| 524 | |
| 525 | fe->i_last_eb_blk = 0; |
| 526 | strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); |
| 527 | le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); |
| 528 | fe->i_atime = fe->i_ctime = fe->i_mtime = |
| 529 | cpu_to_le64(CURRENT_TIME.tv_sec); |
| 530 | fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = |
| 531 | cpu_to_le32(CURRENT_TIME.tv_nsec); |
| 532 | fe->i_dtime = 0; |
| 533 | |
| 534 | /* |
| 535 | * If supported, directories start with inline data. If inline |
| 536 | * isn't supported, but indexing is, we start them as indexed. |
| 537 | */ |
| 538 | feat = le16_to_cpu(fe->i_dyn_features); |
| 539 | if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) { |
| 540 | fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL); |
| 541 | |
| 542 | fe->id2.i_data.id_count = cpu_to_le16( |
| 543 | ocfs2_max_inline_data_with_xattr(osb->sb, fe)); |
| 544 | } else { |
| 545 | fel = &fe->id2.i_list; |
| 546 | fel->l_tree_depth = 0; |
| 547 | fel->l_next_free_rec = 0; |
| 548 | fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb)); |
| 549 | } |
| 550 | |
| 551 | ocfs2_journal_dirty(handle, *new_fe_bh); |
| 552 | |
| 553 | ocfs2_populate_inode(inode, fe, 1); |
| 554 | ocfs2_ci_set_new(osb, INODE_CACHE(inode)); |
| 555 | if (!ocfs2_mount_local(osb)) { |
| 556 | status = ocfs2_create_new_inode_locks(inode); |
| 557 | if (status < 0) |
| 558 | mlog_errno(status); |
| 559 | } |
| 560 | |
| 561 | status = 0; /* error in ocfs2_create_new_inode_locks is not |
| 562 | * critical */ |
| 563 | |
| 564 | leave: |
| 565 | if (status < 0) { |
| 566 | if (*new_fe_bh) { |
| 567 | brelse(*new_fe_bh); |
| 568 | *new_fe_bh = NULL; |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | if (status) |
| 573 | mlog_errno(status); |
| 574 | return status; |
| 575 | } |
| 576 | |
| 577 | static int ocfs2_mknod_locked(struct ocfs2_super *osb, |
| 578 | struct inode *dir, |
| 579 | struct inode *inode, |
| 580 | dev_t dev, |
| 581 | struct buffer_head **new_fe_bh, |
| 582 | struct buffer_head *parent_fe_bh, |
| 583 | handle_t *handle, |
| 584 | struct ocfs2_alloc_context *inode_ac) |
| 585 | { |
| 586 | int status = 0; |
| 587 | u64 suballoc_loc, fe_blkno = 0; |
| 588 | u16 suballoc_bit; |
| 589 | |
| 590 | *new_fe_bh = NULL; |
| 591 | |
| 592 | status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh, |
| 593 | inode_ac, &suballoc_loc, |
| 594 | &suballoc_bit, &fe_blkno); |
| 595 | if (status < 0) { |
| 596 | mlog_errno(status); |
| 597 | return status; |
| 598 | } |
| 599 | |
| 600 | return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, |
| 601 | parent_fe_bh, handle, inode_ac, |
| 602 | fe_blkno, suballoc_loc, suballoc_bit); |
| 603 | } |
| 604 | |
| 605 | static int ocfs2_mkdir(struct inode *dir, |
| 606 | struct dentry *dentry, |
| 607 | int mode) |
| 608 | { |
| 609 | int ret; |
| 610 | |
| 611 | trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, |
| 612 | OCFS2_I(dir)->ip_blkno, mode); |
| 613 | ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); |
| 614 | if (ret) |
| 615 | mlog_errno(ret); |
| 616 | |
| 617 | return ret; |
| 618 | } |
| 619 | |
| 620 | static int ocfs2_create(struct inode *dir, |
| 621 | struct dentry *dentry, |
| 622 | int mode, |
| 623 | struct nameidata *nd) |
| 624 | { |
| 625 | int ret; |
| 626 | |
| 627 | trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name, |
| 628 | (unsigned long long)OCFS2_I(dir)->ip_blkno, mode); |
| 629 | ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); |
| 630 | if (ret) |
| 631 | mlog_errno(ret); |
| 632 | |
| 633 | return ret; |
| 634 | } |
| 635 | |
| 636 | static int ocfs2_link(struct dentry *old_dentry, |
| 637 | struct inode *dir, |
| 638 | struct dentry *dentry) |
| 639 | { |
| 640 | handle_t *handle; |
| 641 | struct inode *inode = old_dentry->d_inode; |
| 642 | int err; |
| 643 | struct buffer_head *fe_bh = NULL; |
| 644 | struct buffer_head *parent_fe_bh = NULL; |
| 645 | struct ocfs2_dinode *fe = NULL; |
| 646 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
| 647 | struct ocfs2_dir_lookup_result lookup = { NULL, }; |
| 648 | sigset_t oldset; |
| 649 | |
| 650 | trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 651 | old_dentry->d_name.len, old_dentry->d_name.name, |
| 652 | dentry->d_name.len, dentry->d_name.name); |
| 653 | |
| 654 | if (S_ISDIR(inode->i_mode)) |
| 655 | return -EPERM; |
| 656 | |
| 657 | dquot_initialize(dir); |
| 658 | |
| 659 | err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT); |
| 660 | if (err < 0) { |
| 661 | if (err != -ENOENT) |
| 662 | mlog_errno(err); |
| 663 | return err; |
| 664 | } |
| 665 | |
| 666 | if (!dir->i_nlink) { |
| 667 | err = -ENOENT; |
| 668 | goto out; |
| 669 | } |
| 670 | |
| 671 | err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
| 672 | dentry->d_name.len); |
| 673 | if (err) |
| 674 | goto out; |
| 675 | |
| 676 | err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, |
| 677 | dentry->d_name.name, |
| 678 | dentry->d_name.len, &lookup); |
| 679 | if (err < 0) { |
| 680 | mlog_errno(err); |
| 681 | goto out; |
| 682 | } |
| 683 | |
| 684 | err = ocfs2_inode_lock(inode, &fe_bh, 1); |
| 685 | if (err < 0) { |
| 686 | if (err != -ENOENT) |
| 687 | mlog_errno(err); |
| 688 | goto out; |
| 689 | } |
| 690 | |
| 691 | fe = (struct ocfs2_dinode *) fe_bh->b_data; |
| 692 | if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) { |
| 693 | err = -EMLINK; |
| 694 | goto out_unlock_inode; |
| 695 | } |
| 696 | |
| 697 | handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb)); |
| 698 | if (IS_ERR(handle)) { |
| 699 | err = PTR_ERR(handle); |
| 700 | handle = NULL; |
| 701 | mlog_errno(err); |
| 702 | goto out_unlock_inode; |
| 703 | } |
| 704 | |
| 705 | /* Starting to change things, restart is no longer possible. */ |
| 706 | ocfs2_block_signals(&oldset); |
| 707 | |
| 708 | err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
| 709 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 710 | if (err < 0) { |
| 711 | mlog_errno(err); |
| 712 | goto out_commit; |
| 713 | } |
| 714 | |
| 715 | inc_nlink(inode); |
| 716 | inode->i_ctime = CURRENT_TIME; |
| 717 | ocfs2_set_links_count(fe, inode->i_nlink); |
| 718 | fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); |
| 719 | fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
| 720 | ocfs2_journal_dirty(handle, fe_bh); |
| 721 | |
| 722 | err = ocfs2_add_entry(handle, dentry, inode, |
| 723 | OCFS2_I(inode)->ip_blkno, |
| 724 | parent_fe_bh, &lookup); |
| 725 | if (err) { |
| 726 | ocfs2_add_links_count(fe, -1); |
| 727 | drop_nlink(inode); |
| 728 | mlog_errno(err); |
| 729 | goto out_commit; |
| 730 | } |
| 731 | |
| 732 | err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
| 733 | if (err) { |
| 734 | mlog_errno(err); |
| 735 | goto out_commit; |
| 736 | } |
| 737 | |
| 738 | ihold(inode); |
| 739 | d_instantiate(dentry, inode); |
| 740 | |
| 741 | out_commit: |
| 742 | ocfs2_commit_trans(osb, handle); |
| 743 | ocfs2_unblock_signals(&oldset); |
| 744 | out_unlock_inode: |
| 745 | ocfs2_inode_unlock(inode, 1); |
| 746 | |
| 747 | out: |
| 748 | ocfs2_inode_unlock(dir, 1); |
| 749 | |
| 750 | brelse(fe_bh); |
| 751 | brelse(parent_fe_bh); |
| 752 | |
| 753 | ocfs2_free_dir_lookup_result(&lookup); |
| 754 | |
| 755 | if (err) |
| 756 | mlog_errno(err); |
| 757 | |
| 758 | return err; |
| 759 | } |
| 760 | |
| 761 | /* |
| 762 | * Takes and drops an exclusive lock on the given dentry. This will |
| 763 | * force other nodes to drop it. |
| 764 | */ |
| 765 | static int ocfs2_remote_dentry_delete(struct dentry *dentry) |
| 766 | { |
| 767 | int ret; |
| 768 | |
| 769 | ret = ocfs2_dentry_lock(dentry, 1); |
| 770 | if (ret) |
| 771 | mlog_errno(ret); |
| 772 | else |
| 773 | ocfs2_dentry_unlock(dentry, 1); |
| 774 | |
| 775 | return ret; |
| 776 | } |
| 777 | |
| 778 | static inline int inode_is_unlinkable(struct inode *inode) |
| 779 | { |
| 780 | if (S_ISDIR(inode->i_mode)) { |
| 781 | if (inode->i_nlink == 2) |
| 782 | return 1; |
| 783 | return 0; |
| 784 | } |
| 785 | |
| 786 | if (inode->i_nlink == 1) |
| 787 | return 1; |
| 788 | return 0; |
| 789 | } |
| 790 | |
| 791 | static int ocfs2_unlink(struct inode *dir, |
| 792 | struct dentry *dentry) |
| 793 | { |
| 794 | int status; |
| 795 | int child_locked = 0; |
| 796 | struct inode *inode = dentry->d_inode; |
| 797 | struct inode *orphan_dir = NULL; |
| 798 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
| 799 | u64 blkno; |
| 800 | struct ocfs2_dinode *fe = NULL; |
| 801 | struct buffer_head *fe_bh = NULL; |
| 802 | struct buffer_head *parent_node_bh = NULL; |
| 803 | handle_t *handle = NULL; |
| 804 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; |
| 805 | struct ocfs2_dir_lookup_result lookup = { NULL, }; |
| 806 | struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; |
| 807 | |
| 808 | trace_ocfs2_unlink(dir, dentry, dentry->d_name.len, |
| 809 | dentry->d_name.name, |
| 810 | (unsigned long long)OCFS2_I(dir)->ip_blkno, |
| 811 | (unsigned long long)OCFS2_I(inode)->ip_blkno); |
| 812 | |
| 813 | dquot_initialize(dir); |
| 814 | |
| 815 | BUG_ON(dentry->d_parent->d_inode != dir); |
| 816 | |
| 817 | if (inode == osb->root_inode) |
| 818 | return -EPERM; |
| 819 | |
| 820 | status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1, |
| 821 | OI_LS_PARENT); |
| 822 | if (status < 0) { |
| 823 | if (status != -ENOENT) |
| 824 | mlog_errno(status); |
| 825 | return status; |
| 826 | } |
| 827 | |
| 828 | status = ocfs2_find_files_on_disk(dentry->d_name.name, |
| 829 | dentry->d_name.len, &blkno, dir, |
| 830 | &lookup); |
| 831 | if (status < 0) { |
| 832 | if (status != -ENOENT) |
| 833 | mlog_errno(status); |
| 834 | goto leave; |
| 835 | } |
| 836 | |
| 837 | if (OCFS2_I(inode)->ip_blkno != blkno) { |
| 838 | status = -ENOENT; |
| 839 | |
| 840 | trace_ocfs2_unlink_noent( |
| 841 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 842 | (unsigned long long)blkno, |
| 843 | OCFS2_I(inode)->ip_flags); |
| 844 | goto leave; |
| 845 | } |
| 846 | |
| 847 | status = ocfs2_inode_lock(inode, &fe_bh, 1); |
| 848 | if (status < 0) { |
| 849 | if (status != -ENOENT) |
| 850 | mlog_errno(status); |
| 851 | goto leave; |
| 852 | } |
| 853 | child_locked = 1; |
| 854 | |
| 855 | if (S_ISDIR(inode->i_mode)) { |
| 856 | if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) { |
| 857 | status = -ENOTEMPTY; |
| 858 | goto leave; |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | status = ocfs2_remote_dentry_delete(dentry); |
| 863 | if (status < 0) { |
| 864 | /* This remote delete should succeed under all normal |
| 865 | * circumstances. */ |
| 866 | mlog_errno(status); |
| 867 | goto leave; |
| 868 | } |
| 869 | |
| 870 | if (inode_is_unlinkable(inode)) { |
| 871 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, |
| 872 | OCFS2_I(inode)->ip_blkno, |
| 873 | orphan_name, &orphan_insert); |
| 874 | if (status < 0) { |
| 875 | mlog_errno(status); |
| 876 | goto leave; |
| 877 | } |
| 878 | } |
| 879 | |
| 880 | handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb)); |
| 881 | if (IS_ERR(handle)) { |
| 882 | status = PTR_ERR(handle); |
| 883 | handle = NULL; |
| 884 | mlog_errno(status); |
| 885 | goto leave; |
| 886 | } |
| 887 | |
| 888 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
| 889 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 890 | if (status < 0) { |
| 891 | mlog_errno(status); |
| 892 | goto leave; |
| 893 | } |
| 894 | |
| 895 | fe = (struct ocfs2_dinode *) fe_bh->b_data; |
| 896 | |
| 897 | if (inode_is_unlinkable(inode)) { |
| 898 | status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name, |
| 899 | &orphan_insert, orphan_dir); |
| 900 | if (status < 0) { |
| 901 | mlog_errno(status); |
| 902 | goto leave; |
| 903 | } |
| 904 | } |
| 905 | |
| 906 | /* delete the name from the parent dir */ |
| 907 | status = ocfs2_delete_entry(handle, dir, &lookup); |
| 908 | if (status < 0) { |
| 909 | mlog_errno(status); |
| 910 | goto leave; |
| 911 | } |
| 912 | |
| 913 | if (S_ISDIR(inode->i_mode)) |
| 914 | drop_nlink(inode); |
| 915 | drop_nlink(inode); |
| 916 | ocfs2_set_links_count(fe, inode->i_nlink); |
| 917 | ocfs2_journal_dirty(handle, fe_bh); |
| 918 | |
| 919 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
| 920 | if (S_ISDIR(inode->i_mode)) |
| 921 | drop_nlink(dir); |
| 922 | |
| 923 | status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); |
| 924 | if (status < 0) { |
| 925 | mlog_errno(status); |
| 926 | if (S_ISDIR(inode->i_mode)) |
| 927 | inc_nlink(dir); |
| 928 | } |
| 929 | |
| 930 | leave: |
| 931 | if (handle) |
| 932 | ocfs2_commit_trans(osb, handle); |
| 933 | |
| 934 | if (child_locked) |
| 935 | ocfs2_inode_unlock(inode, 1); |
| 936 | |
| 937 | ocfs2_inode_unlock(dir, 1); |
| 938 | |
| 939 | if (orphan_dir) { |
| 940 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ |
| 941 | ocfs2_inode_unlock(orphan_dir, 1); |
| 942 | mutex_unlock(&orphan_dir->i_mutex); |
| 943 | iput(orphan_dir); |
| 944 | } |
| 945 | |
| 946 | brelse(fe_bh); |
| 947 | brelse(parent_node_bh); |
| 948 | |
| 949 | ocfs2_free_dir_lookup_result(&orphan_insert); |
| 950 | ocfs2_free_dir_lookup_result(&lookup); |
| 951 | |
| 952 | if (status) |
| 953 | mlog_errno(status); |
| 954 | |
| 955 | return status; |
| 956 | } |
| 957 | |
| 958 | /* |
| 959 | * The only place this should be used is rename! |
| 960 | * if they have the same id, then the 1st one is the only one locked. |
| 961 | */ |
| 962 | static int ocfs2_double_lock(struct ocfs2_super *osb, |
| 963 | struct buffer_head **bh1, |
| 964 | struct inode *inode1, |
| 965 | struct buffer_head **bh2, |
| 966 | struct inode *inode2) |
| 967 | { |
| 968 | int status; |
| 969 | struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); |
| 970 | struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); |
| 971 | struct buffer_head **tmpbh; |
| 972 | struct inode *tmpinode; |
| 973 | |
| 974 | trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno, |
| 975 | (unsigned long long)oi2->ip_blkno); |
| 976 | |
| 977 | if (*bh1) |
| 978 | *bh1 = NULL; |
| 979 | if (*bh2) |
| 980 | *bh2 = NULL; |
| 981 | |
| 982 | /* we always want to lock the one with the lower lockid first. */ |
| 983 | if (oi1->ip_blkno != oi2->ip_blkno) { |
| 984 | if (oi1->ip_blkno < oi2->ip_blkno) { |
| 985 | /* switch id1 and id2 around */ |
| 986 | tmpbh = bh2; |
| 987 | bh2 = bh1; |
| 988 | bh1 = tmpbh; |
| 989 | |
| 990 | tmpinode = inode2; |
| 991 | inode2 = inode1; |
| 992 | inode1 = tmpinode; |
| 993 | } |
| 994 | /* lock id2 */ |
| 995 | status = ocfs2_inode_lock_nested(inode2, bh2, 1, |
| 996 | OI_LS_RENAME1); |
| 997 | if (status < 0) { |
| 998 | if (status != -ENOENT) |
| 999 | mlog_errno(status); |
| 1000 | goto bail; |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | /* lock id1 */ |
| 1005 | status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2); |
| 1006 | if (status < 0) { |
| 1007 | /* |
| 1008 | * An error return must mean that no cluster locks |
| 1009 | * were held on function exit. |
| 1010 | */ |
| 1011 | if (oi1->ip_blkno != oi2->ip_blkno) { |
| 1012 | ocfs2_inode_unlock(inode2, 1); |
| 1013 | brelse(*bh2); |
| 1014 | *bh2 = NULL; |
| 1015 | } |
| 1016 | |
| 1017 | if (status != -ENOENT) |
| 1018 | mlog_errno(status); |
| 1019 | } |
| 1020 | |
| 1021 | trace_ocfs2_double_lock_end( |
| 1022 | (unsigned long long)OCFS2_I(inode1)->ip_blkno, |
| 1023 | (unsigned long long)OCFS2_I(inode2)->ip_blkno); |
| 1024 | |
| 1025 | bail: |
| 1026 | if (status) |
| 1027 | mlog_errno(status); |
| 1028 | return status; |
| 1029 | } |
| 1030 | |
| 1031 | static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) |
| 1032 | { |
| 1033 | ocfs2_inode_unlock(inode1, 1); |
| 1034 | |
| 1035 | if (inode1 != inode2) |
| 1036 | ocfs2_inode_unlock(inode2, 1); |
| 1037 | } |
| 1038 | |
| 1039 | static int ocfs2_rename(struct inode *old_dir, |
| 1040 | struct dentry *old_dentry, |
| 1041 | struct inode *new_dir, |
| 1042 | struct dentry *new_dentry) |
| 1043 | { |
| 1044 | int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0; |
| 1045 | int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0; |
| 1046 | struct inode *old_inode = old_dentry->d_inode; |
| 1047 | struct inode *new_inode = new_dentry->d_inode; |
| 1048 | struct inode *orphan_dir = NULL; |
| 1049 | struct ocfs2_dinode *newfe = NULL; |
| 1050 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; |
| 1051 | struct buffer_head *newfe_bh = NULL; |
| 1052 | struct buffer_head *old_inode_bh = NULL; |
| 1053 | struct ocfs2_super *osb = NULL; |
| 1054 | u64 newfe_blkno, old_de_ino; |
| 1055 | handle_t *handle = NULL; |
| 1056 | struct buffer_head *old_dir_bh = NULL; |
| 1057 | struct buffer_head *new_dir_bh = NULL; |
| 1058 | nlink_t old_dir_nlink = old_dir->i_nlink; |
| 1059 | struct ocfs2_dinode *old_di; |
| 1060 | struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; |
| 1061 | struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; |
| 1062 | struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; |
| 1063 | struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; |
| 1064 | struct ocfs2_dir_lookup_result target_insert = { NULL, }; |
| 1065 | |
| 1066 | /* At some point it might be nice to break this function up a |
| 1067 | * bit. */ |
| 1068 | |
| 1069 | trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry, |
| 1070 | old_dentry->d_name.len, old_dentry->d_name.name, |
| 1071 | new_dentry->d_name.len, new_dentry->d_name.name); |
| 1072 | |
| 1073 | dquot_initialize(old_dir); |
| 1074 | dquot_initialize(new_dir); |
| 1075 | |
| 1076 | osb = OCFS2_SB(old_dir->i_sb); |
| 1077 | |
| 1078 | if (new_inode) { |
| 1079 | if (!igrab(new_inode)) |
| 1080 | BUG(); |
| 1081 | } |
| 1082 | |
| 1083 | /* Assume a directory hierarchy thusly: |
| 1084 | * a/b/c |
| 1085 | * a/d |
| 1086 | * a,b,c, and d are all directories. |
| 1087 | * |
| 1088 | * from cwd of 'a' on both nodes: |
| 1089 | * node1: mv b/c d |
| 1090 | * node2: mv d b/c |
| 1091 | * |
| 1092 | * And that's why, just like the VFS, we need a file system |
| 1093 | * rename lock. */ |
| 1094 | if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) { |
| 1095 | status = ocfs2_rename_lock(osb); |
| 1096 | if (status < 0) { |
| 1097 | mlog_errno(status); |
| 1098 | goto bail; |
| 1099 | } |
| 1100 | rename_lock = 1; |
| 1101 | } |
| 1102 | |
| 1103 | /* if old and new are the same, this'll just do one lock. */ |
| 1104 | status = ocfs2_double_lock(osb, &old_dir_bh, old_dir, |
| 1105 | &new_dir_bh, new_dir); |
| 1106 | if (status < 0) { |
| 1107 | mlog_errno(status); |
| 1108 | goto bail; |
| 1109 | } |
| 1110 | parents_locked = 1; |
| 1111 | |
| 1112 | /* make sure both dirs have bhs |
| 1113 | * get an extra ref on old_dir_bh if old==new */ |
| 1114 | if (!new_dir_bh) { |
| 1115 | if (old_dir_bh) { |
| 1116 | new_dir_bh = old_dir_bh; |
| 1117 | get_bh(new_dir_bh); |
| 1118 | } else { |
| 1119 | mlog(ML_ERROR, "no old_dir_bh!\n"); |
| 1120 | status = -EIO; |
| 1121 | goto bail; |
| 1122 | } |
| 1123 | } |
| 1124 | |
| 1125 | /* |
| 1126 | * Aside from allowing a meta data update, the locking here |
| 1127 | * also ensures that the downconvert thread on other nodes |
| 1128 | * won't have to concurrently downconvert the inode and the |
| 1129 | * dentry locks. |
| 1130 | */ |
| 1131 | status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1, |
| 1132 | OI_LS_PARENT); |
| 1133 | if (status < 0) { |
| 1134 | if (status != -ENOENT) |
| 1135 | mlog_errno(status); |
| 1136 | goto bail; |
| 1137 | } |
| 1138 | old_child_locked = 1; |
| 1139 | |
| 1140 | status = ocfs2_remote_dentry_delete(old_dentry); |
| 1141 | if (status < 0) { |
| 1142 | mlog_errno(status); |
| 1143 | goto bail; |
| 1144 | } |
| 1145 | |
| 1146 | if (S_ISDIR(old_inode->i_mode)) { |
| 1147 | u64 old_inode_parent; |
| 1148 | |
| 1149 | update_dot_dot = 1; |
| 1150 | status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, |
| 1151 | old_inode, |
| 1152 | &old_inode_dot_dot_res); |
| 1153 | if (status) { |
| 1154 | status = -EIO; |
| 1155 | goto bail; |
| 1156 | } |
| 1157 | |
| 1158 | if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) { |
| 1159 | status = -EIO; |
| 1160 | goto bail; |
| 1161 | } |
| 1162 | |
| 1163 | if (!new_inode && new_dir != old_dir && |
| 1164 | new_dir->i_nlink >= ocfs2_link_max(osb)) { |
| 1165 | status = -EMLINK; |
| 1166 | goto bail; |
| 1167 | } |
| 1168 | } |
| 1169 | |
| 1170 | status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, |
| 1171 | old_dentry->d_name.len, |
| 1172 | &old_de_ino); |
| 1173 | if (status) { |
| 1174 | status = -ENOENT; |
| 1175 | goto bail; |
| 1176 | } |
| 1177 | |
| 1178 | /* |
| 1179 | * Check for inode number is _not_ due to possible IO errors. |
| 1180 | * We might rmdir the source, keep it as pwd of some process |
| 1181 | * and merrily kill the link to whatever was created under the |
| 1182 | * same name. Goodbye sticky bit ;-< |
| 1183 | */ |
| 1184 | if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) { |
| 1185 | status = -ENOENT; |
| 1186 | goto bail; |
| 1187 | } |
| 1188 | |
| 1189 | /* check if the target already exists (in which case we need |
| 1190 | * to delete it */ |
| 1191 | status = ocfs2_find_files_on_disk(new_dentry->d_name.name, |
| 1192 | new_dentry->d_name.len, |
| 1193 | &newfe_blkno, new_dir, |
| 1194 | &target_lookup_res); |
| 1195 | /* The only error we allow here is -ENOENT because the new |
| 1196 | * file not existing is perfectly valid. */ |
| 1197 | if ((status < 0) && (status != -ENOENT)) { |
| 1198 | /* If we cannot find the file specified we should just */ |
| 1199 | /* return the error... */ |
| 1200 | mlog_errno(status); |
| 1201 | goto bail; |
| 1202 | } |
| 1203 | if (status == 0) |
| 1204 | target_exists = 1; |
| 1205 | |
| 1206 | if (!target_exists && new_inode) { |
| 1207 | /* |
| 1208 | * Target was unlinked by another node while we were |
| 1209 | * waiting to get to ocfs2_rename(). There isn't |
| 1210 | * anything we can do here to help the situation, so |
| 1211 | * bubble up the appropriate error. |
| 1212 | */ |
| 1213 | status = -ENOENT; |
| 1214 | goto bail; |
| 1215 | } |
| 1216 | |
| 1217 | /* In case we need to overwrite an existing file, we blow it |
| 1218 | * away first */ |
| 1219 | if (target_exists) { |
| 1220 | /* VFS didn't think there existed an inode here, but |
| 1221 | * someone else in the cluster must have raced our |
| 1222 | * rename to create one. Today we error cleanly, in |
| 1223 | * the future we should consider calling iget to build |
| 1224 | * a new struct inode for this entry. */ |
| 1225 | if (!new_inode) { |
| 1226 | status = -EACCES; |
| 1227 | |
| 1228 | trace_ocfs2_rename_target_exists(new_dentry->d_name.len, |
| 1229 | new_dentry->d_name.name); |
| 1230 | goto bail; |
| 1231 | } |
| 1232 | |
| 1233 | if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { |
| 1234 | status = -EACCES; |
| 1235 | |
| 1236 | trace_ocfs2_rename_disagree( |
| 1237 | (unsigned long long)OCFS2_I(new_inode)->ip_blkno, |
| 1238 | (unsigned long long)newfe_blkno, |
| 1239 | OCFS2_I(new_inode)->ip_flags); |
| 1240 | goto bail; |
| 1241 | } |
| 1242 | |
| 1243 | status = ocfs2_inode_lock(new_inode, &newfe_bh, 1); |
| 1244 | if (status < 0) { |
| 1245 | if (status != -ENOENT) |
| 1246 | mlog_errno(status); |
| 1247 | goto bail; |
| 1248 | } |
| 1249 | new_child_locked = 1; |
| 1250 | |
| 1251 | status = ocfs2_remote_dentry_delete(new_dentry); |
| 1252 | if (status < 0) { |
| 1253 | mlog_errno(status); |
| 1254 | goto bail; |
| 1255 | } |
| 1256 | |
| 1257 | newfe = (struct ocfs2_dinode *) newfe_bh->b_data; |
| 1258 | |
| 1259 | trace_ocfs2_rename_over_existing( |
| 1260 | (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ? |
| 1261 | (unsigned long long)newfe_bh->b_blocknr : 0ULL); |
| 1262 | |
| 1263 | if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) { |
| 1264 | status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, |
| 1265 | OCFS2_I(new_inode)->ip_blkno, |
| 1266 | orphan_name, &orphan_insert); |
| 1267 | if (status < 0) { |
| 1268 | mlog_errno(status); |
| 1269 | goto bail; |
| 1270 | } |
| 1271 | } |
| 1272 | } else { |
| 1273 | BUG_ON(new_dentry->d_parent->d_inode != new_dir); |
| 1274 | |
| 1275 | status = ocfs2_check_dir_for_entry(new_dir, |
| 1276 | new_dentry->d_name.name, |
| 1277 | new_dentry->d_name.len); |
| 1278 | if (status) |
| 1279 | goto bail; |
| 1280 | |
| 1281 | status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, |
| 1282 | new_dentry->d_name.name, |
| 1283 | new_dentry->d_name.len, |
| 1284 | &target_insert); |
| 1285 | if (status < 0) { |
| 1286 | mlog_errno(status); |
| 1287 | goto bail; |
| 1288 | } |
| 1289 | } |
| 1290 | |
| 1291 | handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); |
| 1292 | if (IS_ERR(handle)) { |
| 1293 | status = PTR_ERR(handle); |
| 1294 | handle = NULL; |
| 1295 | mlog_errno(status); |
| 1296 | goto bail; |
| 1297 | } |
| 1298 | |
| 1299 | if (target_exists) { |
| 1300 | if (S_ISDIR(new_inode->i_mode)) { |
| 1301 | if (new_inode->i_nlink != 2 || |
| 1302 | !ocfs2_empty_dir(new_inode)) { |
| 1303 | status = -ENOTEMPTY; |
| 1304 | goto bail; |
| 1305 | } |
| 1306 | } |
| 1307 | status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode), |
| 1308 | newfe_bh, |
| 1309 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 1310 | if (status < 0) { |
| 1311 | mlog_errno(status); |
| 1312 | goto bail; |
| 1313 | } |
| 1314 | |
| 1315 | if (S_ISDIR(new_inode->i_mode) || |
| 1316 | (ocfs2_read_links_count(newfe) == 1)) { |
| 1317 | status = ocfs2_orphan_add(osb, handle, new_inode, |
| 1318 | newfe_bh, orphan_name, |
| 1319 | &orphan_insert, orphan_dir); |
| 1320 | if (status < 0) { |
| 1321 | mlog_errno(status); |
| 1322 | goto bail; |
| 1323 | } |
| 1324 | } |
| 1325 | |
| 1326 | /* change the dirent to point to the correct inode */ |
| 1327 | status = ocfs2_update_entry(new_dir, handle, &target_lookup_res, |
| 1328 | old_inode); |
| 1329 | if (status < 0) { |
| 1330 | mlog_errno(status); |
| 1331 | goto bail; |
| 1332 | } |
| 1333 | new_dir->i_version++; |
| 1334 | |
| 1335 | if (S_ISDIR(new_inode->i_mode)) |
| 1336 | ocfs2_set_links_count(newfe, 0); |
| 1337 | else |
| 1338 | ocfs2_add_links_count(newfe, -1); |
| 1339 | ocfs2_journal_dirty(handle, newfe_bh); |
| 1340 | } else { |
| 1341 | /* if the name was not found in new_dir, add it now */ |
| 1342 | status = ocfs2_add_entry(handle, new_dentry, old_inode, |
| 1343 | OCFS2_I(old_inode)->ip_blkno, |
| 1344 | new_dir_bh, &target_insert); |
| 1345 | } |
| 1346 | |
| 1347 | old_inode->i_ctime = CURRENT_TIME; |
| 1348 | mark_inode_dirty(old_inode); |
| 1349 | |
| 1350 | status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode), |
| 1351 | old_inode_bh, |
| 1352 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 1353 | if (status >= 0) { |
| 1354 | old_di = (struct ocfs2_dinode *) old_inode_bh->b_data; |
| 1355 | |
| 1356 | old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec); |
| 1357 | old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); |
| 1358 | ocfs2_journal_dirty(handle, old_inode_bh); |
| 1359 | } else |
| 1360 | mlog_errno(status); |
| 1361 | |
| 1362 | /* |
| 1363 | * Now that the name has been added to new_dir, remove the old name. |
| 1364 | * |
| 1365 | * We don't keep any directory entry context around until now |
| 1366 | * because the insert might have changed the type of directory |
| 1367 | * we're dealing with. |
| 1368 | */ |
| 1369 | status = ocfs2_find_entry(old_dentry->d_name.name, |
| 1370 | old_dentry->d_name.len, old_dir, |
| 1371 | &old_entry_lookup); |
| 1372 | if (status) |
| 1373 | goto bail; |
| 1374 | |
| 1375 | status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); |
| 1376 | if (status < 0) { |
| 1377 | mlog_errno(status); |
| 1378 | goto bail; |
| 1379 | } |
| 1380 | |
| 1381 | if (new_inode) { |
| 1382 | new_inode->i_nlink--; |
| 1383 | new_inode->i_ctime = CURRENT_TIME; |
| 1384 | } |
| 1385 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; |
| 1386 | |
| 1387 | if (update_dot_dot) { |
| 1388 | status = ocfs2_update_entry(old_inode, handle, |
| 1389 | &old_inode_dot_dot_res, new_dir); |
| 1390 | old_dir->i_nlink--; |
| 1391 | if (new_inode) { |
| 1392 | new_inode->i_nlink--; |
| 1393 | } else { |
| 1394 | inc_nlink(new_dir); |
| 1395 | mark_inode_dirty(new_dir); |
| 1396 | } |
| 1397 | } |
| 1398 | mark_inode_dirty(old_dir); |
| 1399 | ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); |
| 1400 | if (new_inode) { |
| 1401 | mark_inode_dirty(new_inode); |
| 1402 | ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); |
| 1403 | } |
| 1404 | |
| 1405 | if (old_dir != new_dir) { |
| 1406 | /* Keep the same times on both directories.*/ |
| 1407 | new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; |
| 1408 | |
| 1409 | /* |
| 1410 | * This will also pick up the i_nlink change from the |
| 1411 | * block above. |
| 1412 | */ |
| 1413 | ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); |
| 1414 | } |
| 1415 | |
| 1416 | if (old_dir_nlink != old_dir->i_nlink) { |
| 1417 | if (!old_dir_bh) { |
| 1418 | mlog(ML_ERROR, "need to change nlink for old dir " |
| 1419 | "%llu from %d to %d but bh is NULL!\n", |
| 1420 | (unsigned long long)OCFS2_I(old_dir)->ip_blkno, |
| 1421 | (int)old_dir_nlink, old_dir->i_nlink); |
| 1422 | } else { |
| 1423 | struct ocfs2_dinode *fe; |
| 1424 | status = ocfs2_journal_access_di(handle, |
| 1425 | INODE_CACHE(old_dir), |
| 1426 | old_dir_bh, |
| 1427 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 1428 | fe = (struct ocfs2_dinode *) old_dir_bh->b_data; |
| 1429 | ocfs2_set_links_count(fe, old_dir->i_nlink); |
| 1430 | ocfs2_journal_dirty(handle, old_dir_bh); |
| 1431 | } |
| 1432 | } |
| 1433 | ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); |
| 1434 | status = 0; |
| 1435 | bail: |
| 1436 | if (rename_lock) |
| 1437 | ocfs2_rename_unlock(osb); |
| 1438 | |
| 1439 | if (handle) |
| 1440 | ocfs2_commit_trans(osb, handle); |
| 1441 | |
| 1442 | if (parents_locked) |
| 1443 | ocfs2_double_unlock(old_dir, new_dir); |
| 1444 | |
| 1445 | if (old_child_locked) |
| 1446 | ocfs2_inode_unlock(old_inode, 1); |
| 1447 | |
| 1448 | if (new_child_locked) |
| 1449 | ocfs2_inode_unlock(new_inode, 1); |
| 1450 | |
| 1451 | if (orphan_dir) { |
| 1452 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ |
| 1453 | ocfs2_inode_unlock(orphan_dir, 1); |
| 1454 | mutex_unlock(&orphan_dir->i_mutex); |
| 1455 | iput(orphan_dir); |
| 1456 | } |
| 1457 | |
| 1458 | if (new_inode) |
| 1459 | sync_mapping_buffers(old_inode->i_mapping); |
| 1460 | |
| 1461 | if (new_inode) |
| 1462 | iput(new_inode); |
| 1463 | |
| 1464 | ocfs2_free_dir_lookup_result(&target_lookup_res); |
| 1465 | ocfs2_free_dir_lookup_result(&old_entry_lookup); |
| 1466 | ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res); |
| 1467 | ocfs2_free_dir_lookup_result(&orphan_insert); |
| 1468 | ocfs2_free_dir_lookup_result(&target_insert); |
| 1469 | |
| 1470 | brelse(newfe_bh); |
| 1471 | brelse(old_inode_bh); |
| 1472 | brelse(old_dir_bh); |
| 1473 | brelse(new_dir_bh); |
| 1474 | |
| 1475 | if (status) |
| 1476 | mlog_errno(status); |
| 1477 | |
| 1478 | return status; |
| 1479 | } |
| 1480 | |
| 1481 | /* |
| 1482 | * we expect i_size = strlen(symname). Copy symname into the file |
| 1483 | * data, including the null terminator. |
| 1484 | */ |
| 1485 | static int ocfs2_create_symlink_data(struct ocfs2_super *osb, |
| 1486 | handle_t *handle, |
| 1487 | struct inode *inode, |
| 1488 | const char *symname) |
| 1489 | { |
| 1490 | struct buffer_head **bhs = NULL; |
| 1491 | const char *c; |
| 1492 | struct super_block *sb = osb->sb; |
| 1493 | u64 p_blkno, p_blocks; |
| 1494 | int virtual, blocks, status, i, bytes_left; |
| 1495 | |
| 1496 | bytes_left = i_size_read(inode) + 1; |
| 1497 | /* we can't trust i_blocks because we're actually going to |
| 1498 | * write i_size + 1 bytes. */ |
| 1499 | blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits; |
| 1500 | |
| 1501 | trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks, |
| 1502 | i_size_read(inode), blocks); |
| 1503 | |
| 1504 | /* Sanity check -- make sure we're going to fit. */ |
| 1505 | if (bytes_left > |
| 1506 | ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) { |
| 1507 | status = -EIO; |
| 1508 | mlog_errno(status); |
| 1509 | goto bail; |
| 1510 | } |
| 1511 | |
| 1512 | bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL); |
| 1513 | if (!bhs) { |
| 1514 | status = -ENOMEM; |
| 1515 | mlog_errno(status); |
| 1516 | goto bail; |
| 1517 | } |
| 1518 | |
| 1519 | status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, |
| 1520 | NULL); |
| 1521 | if (status < 0) { |
| 1522 | mlog_errno(status); |
| 1523 | goto bail; |
| 1524 | } |
| 1525 | |
| 1526 | /* links can never be larger than one cluster so we know this |
| 1527 | * is all going to be contiguous, but do a sanity check |
| 1528 | * anyway. */ |
| 1529 | if ((p_blocks << sb->s_blocksize_bits) < bytes_left) { |
| 1530 | status = -EIO; |
| 1531 | mlog_errno(status); |
| 1532 | goto bail; |
| 1533 | } |
| 1534 | |
| 1535 | virtual = 0; |
| 1536 | while(bytes_left > 0) { |
| 1537 | c = &symname[virtual * sb->s_blocksize]; |
| 1538 | |
| 1539 | bhs[virtual] = sb_getblk(sb, p_blkno); |
| 1540 | if (!bhs[virtual]) { |
| 1541 | status = -ENOMEM; |
| 1542 | mlog_errno(status); |
| 1543 | goto bail; |
| 1544 | } |
| 1545 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), |
| 1546 | bhs[virtual]); |
| 1547 | |
| 1548 | status = ocfs2_journal_access(handle, INODE_CACHE(inode), |
| 1549 | bhs[virtual], |
| 1550 | OCFS2_JOURNAL_ACCESS_CREATE); |
| 1551 | if (status < 0) { |
| 1552 | mlog_errno(status); |
| 1553 | goto bail; |
| 1554 | } |
| 1555 | |
| 1556 | memset(bhs[virtual]->b_data, 0, sb->s_blocksize); |
| 1557 | |
| 1558 | memcpy(bhs[virtual]->b_data, c, |
| 1559 | (bytes_left > sb->s_blocksize) ? sb->s_blocksize : |
| 1560 | bytes_left); |
| 1561 | |
| 1562 | ocfs2_journal_dirty(handle, bhs[virtual]); |
| 1563 | |
| 1564 | virtual++; |
| 1565 | p_blkno++; |
| 1566 | bytes_left -= sb->s_blocksize; |
| 1567 | } |
| 1568 | |
| 1569 | status = 0; |
| 1570 | bail: |
| 1571 | |
| 1572 | if (bhs) { |
| 1573 | for(i = 0; i < blocks; i++) |
| 1574 | brelse(bhs[i]); |
| 1575 | kfree(bhs); |
| 1576 | } |
| 1577 | |
| 1578 | if (status) |
| 1579 | mlog_errno(status); |
| 1580 | return status; |
| 1581 | } |
| 1582 | |
| 1583 | static int ocfs2_symlink(struct inode *dir, |
| 1584 | struct dentry *dentry, |
| 1585 | const char *symname) |
| 1586 | { |
| 1587 | int status, l, credits; |
| 1588 | u64 newsize; |
| 1589 | struct ocfs2_super *osb = NULL; |
| 1590 | struct inode *inode = NULL; |
| 1591 | struct super_block *sb; |
| 1592 | struct buffer_head *new_fe_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 | struct ocfs2_alloc_context *xattr_ac = NULL; |
| 1600 | int want_clusters = 0; |
| 1601 | int xattr_credits = 0; |
| 1602 | struct ocfs2_security_xattr_info si = { |
| 1603 | .enable = 1, |
| 1604 | }; |
| 1605 | int did_quota = 0, did_quota_inode = 0; |
| 1606 | struct ocfs2_dir_lookup_result lookup = { NULL, }; |
| 1607 | sigset_t oldset; |
| 1608 | int did_block_signals = 0; |
| 1609 | |
| 1610 | trace_ocfs2_symlink_begin(dir, dentry, symname, |
| 1611 | dentry->d_name.len, dentry->d_name.name); |
| 1612 | |
| 1613 | dquot_initialize(dir); |
| 1614 | |
| 1615 | sb = dir->i_sb; |
| 1616 | osb = OCFS2_SB(sb); |
| 1617 | |
| 1618 | l = strlen(symname) + 1; |
| 1619 | |
| 1620 | credits = ocfs2_calc_symlink_credits(sb); |
| 1621 | |
| 1622 | /* lock the parent directory */ |
| 1623 | status = ocfs2_inode_lock(dir, &parent_fe_bh, 1); |
| 1624 | if (status < 0) { |
| 1625 | if (status != -ENOENT) |
| 1626 | mlog_errno(status); |
| 1627 | return status; |
| 1628 | } |
| 1629 | |
| 1630 | dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; |
| 1631 | if (!ocfs2_read_links_count(dirfe)) { |
| 1632 | /* can't make a file in a deleted directory. */ |
| 1633 | status = -ENOENT; |
| 1634 | goto bail; |
| 1635 | } |
| 1636 | |
| 1637 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
| 1638 | dentry->d_name.len); |
| 1639 | if (status) |
| 1640 | goto bail; |
| 1641 | |
| 1642 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, |
| 1643 | dentry->d_name.name, |
| 1644 | dentry->d_name.len, &lookup); |
| 1645 | if (status < 0) { |
| 1646 | mlog_errno(status); |
| 1647 | goto bail; |
| 1648 | } |
| 1649 | |
| 1650 | status = ocfs2_reserve_new_inode(osb, &inode_ac); |
| 1651 | if (status < 0) { |
| 1652 | if (status != -ENOSPC) |
| 1653 | mlog_errno(status); |
| 1654 | goto bail; |
| 1655 | } |
| 1656 | |
| 1657 | inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO); |
| 1658 | if (!inode) { |
| 1659 | status = -ENOMEM; |
| 1660 | mlog_errno(status); |
| 1661 | goto bail; |
| 1662 | } |
| 1663 | |
| 1664 | /* get security xattr */ |
| 1665 | status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); |
| 1666 | if (status) { |
| 1667 | if (status == -EOPNOTSUPP) |
| 1668 | si.enable = 0; |
| 1669 | else { |
| 1670 | mlog_errno(status); |
| 1671 | goto bail; |
| 1672 | } |
| 1673 | } |
| 1674 | |
| 1675 | /* calculate meta data/clusters for setting security xattr */ |
| 1676 | if (si.enable) { |
| 1677 | status = ocfs2_calc_security_init(dir, &si, &want_clusters, |
| 1678 | &xattr_credits, &xattr_ac); |
| 1679 | if (status < 0) { |
| 1680 | mlog_errno(status); |
| 1681 | goto bail; |
| 1682 | } |
| 1683 | } |
| 1684 | |
| 1685 | /* don't reserve bitmap space for fast symlinks. */ |
| 1686 | if (l > ocfs2_fast_symlink_chars(sb)) |
| 1687 | want_clusters += 1; |
| 1688 | |
| 1689 | status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac); |
| 1690 | if (status < 0) { |
| 1691 | if (status != -ENOSPC) |
| 1692 | mlog_errno(status); |
| 1693 | goto bail; |
| 1694 | } |
| 1695 | |
| 1696 | handle = ocfs2_start_trans(osb, credits + xattr_credits); |
| 1697 | if (IS_ERR(handle)) { |
| 1698 | status = PTR_ERR(handle); |
| 1699 | handle = NULL; |
| 1700 | mlog_errno(status); |
| 1701 | goto bail; |
| 1702 | } |
| 1703 | |
| 1704 | /* Starting to change things, restart is no longer possible. */ |
| 1705 | ocfs2_block_signals(&oldset); |
| 1706 | did_block_signals = 1; |
| 1707 | |
| 1708 | status = dquot_alloc_inode(inode); |
| 1709 | if (status) |
| 1710 | goto bail; |
| 1711 | did_quota_inode = 1; |
| 1712 | |
| 1713 | trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len, |
| 1714 | dentry->d_name.name, |
| 1715 | (unsigned long long)OCFS2_I(dir)->ip_blkno, |
| 1716 | inode->i_mode); |
| 1717 | |
| 1718 | status = ocfs2_mknod_locked(osb, dir, inode, |
| 1719 | 0, &new_fe_bh, parent_fe_bh, handle, |
| 1720 | inode_ac); |
| 1721 | if (status < 0) { |
| 1722 | mlog_errno(status); |
| 1723 | goto bail; |
| 1724 | } |
| 1725 | |
| 1726 | fe = (struct ocfs2_dinode *) new_fe_bh->b_data; |
| 1727 | inode->i_rdev = 0; |
| 1728 | newsize = l - 1; |
| 1729 | if (l > ocfs2_fast_symlink_chars(sb)) { |
| 1730 | u32 offset = 0; |
| 1731 | |
| 1732 | inode->i_op = &ocfs2_symlink_inode_operations; |
| 1733 | status = dquot_alloc_space_nodirty(inode, |
| 1734 | ocfs2_clusters_to_bytes(osb->sb, 1)); |
| 1735 | if (status) |
| 1736 | goto bail; |
| 1737 | did_quota = 1; |
| 1738 | status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0, |
| 1739 | new_fe_bh, |
| 1740 | handle, data_ac, NULL, |
| 1741 | NULL); |
| 1742 | if (status < 0) { |
| 1743 | if (status != -ENOSPC && status != -EINTR) { |
| 1744 | mlog(ML_ERROR, |
| 1745 | "Failed to extend file to %llu\n", |
| 1746 | (unsigned long long)newsize); |
| 1747 | mlog_errno(status); |
| 1748 | status = -ENOSPC; |
| 1749 | } |
| 1750 | goto bail; |
| 1751 | } |
| 1752 | i_size_write(inode, newsize); |
| 1753 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
| 1754 | } else { |
| 1755 | inode->i_op = &ocfs2_fast_symlink_inode_operations; |
| 1756 | memcpy((char *) fe->id2.i_symlink, symname, l); |
| 1757 | i_size_write(inode, newsize); |
| 1758 | inode->i_blocks = 0; |
| 1759 | } |
| 1760 | |
| 1761 | status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh); |
| 1762 | if (status < 0) { |
| 1763 | mlog_errno(status); |
| 1764 | goto bail; |
| 1765 | } |
| 1766 | |
| 1767 | if (!ocfs2_inode_is_fast_symlink(inode)) { |
| 1768 | status = ocfs2_create_symlink_data(osb, handle, inode, |
| 1769 | symname); |
| 1770 | if (status < 0) { |
| 1771 | mlog_errno(status); |
| 1772 | goto bail; |
| 1773 | } |
| 1774 | } |
| 1775 | |
| 1776 | if (si.enable) { |
| 1777 | status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si, |
| 1778 | xattr_ac, data_ac); |
| 1779 | if (status < 0) { |
| 1780 | mlog_errno(status); |
| 1781 | goto bail; |
| 1782 | } |
| 1783 | } |
| 1784 | |
| 1785 | /* |
| 1786 | * Do this before adding the entry to the directory. We add |
| 1787 | * also set d_op after success so that ->d_iput() will cleanup |
| 1788 | * the dentry lock even if ocfs2_add_entry() fails below. |
| 1789 | */ |
| 1790 | status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
| 1791 | if (status) { |
| 1792 | mlog_errno(status); |
| 1793 | goto bail; |
| 1794 | } |
| 1795 | |
| 1796 | status = ocfs2_add_entry(handle, dentry, inode, |
| 1797 | le64_to_cpu(fe->i_blkno), parent_fe_bh, |
| 1798 | &lookup); |
| 1799 | if (status < 0) { |
| 1800 | mlog_errno(status); |
| 1801 | goto bail; |
| 1802 | } |
| 1803 | |
| 1804 | insert_inode_hash(inode); |
| 1805 | d_instantiate(dentry, inode); |
| 1806 | bail: |
| 1807 | if (status < 0 && did_quota) |
| 1808 | dquot_free_space_nodirty(inode, |
| 1809 | ocfs2_clusters_to_bytes(osb->sb, 1)); |
| 1810 | if (status < 0 && did_quota_inode) |
| 1811 | dquot_free_inode(inode); |
| 1812 | if (handle) |
| 1813 | ocfs2_commit_trans(osb, handle); |
| 1814 | |
| 1815 | ocfs2_inode_unlock(dir, 1); |
| 1816 | if (did_block_signals) |
| 1817 | ocfs2_unblock_signals(&oldset); |
| 1818 | |
| 1819 | brelse(new_fe_bh); |
| 1820 | brelse(parent_fe_bh); |
| 1821 | kfree(si.name); |
| 1822 | kfree(si.value); |
| 1823 | ocfs2_free_dir_lookup_result(&lookup); |
| 1824 | if (inode_ac) |
| 1825 | ocfs2_free_alloc_context(inode_ac); |
| 1826 | if (data_ac) |
| 1827 | ocfs2_free_alloc_context(data_ac); |
| 1828 | if (xattr_ac) |
| 1829 | ocfs2_free_alloc_context(xattr_ac); |
| 1830 | if ((status < 0) && inode) { |
| 1831 | OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR; |
| 1832 | clear_nlink(inode); |
| 1833 | iput(inode); |
| 1834 | } |
| 1835 | |
| 1836 | if (status) |
| 1837 | mlog_errno(status); |
| 1838 | |
| 1839 | return status; |
| 1840 | } |
| 1841 | |
| 1842 | static int ocfs2_blkno_stringify(u64 blkno, char *name) |
| 1843 | { |
| 1844 | int status, namelen; |
| 1845 | |
| 1846 | namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx", |
| 1847 | (long long)blkno); |
| 1848 | if (namelen <= 0) { |
| 1849 | if (namelen) |
| 1850 | status = namelen; |
| 1851 | else |
| 1852 | status = -EINVAL; |
| 1853 | mlog_errno(status); |
| 1854 | goto bail; |
| 1855 | } |
| 1856 | if (namelen != OCFS2_ORPHAN_NAMELEN) { |
| 1857 | status = -EINVAL; |
| 1858 | mlog_errno(status); |
| 1859 | goto bail; |
| 1860 | } |
| 1861 | |
| 1862 | trace_ocfs2_blkno_stringify(blkno, name, namelen); |
| 1863 | |
| 1864 | status = 0; |
| 1865 | bail: |
| 1866 | if (status < 0) |
| 1867 | mlog_errno(status); |
| 1868 | return status; |
| 1869 | } |
| 1870 | |
| 1871 | static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, |
| 1872 | struct inode **ret_orphan_dir, |
| 1873 | struct buffer_head **ret_orphan_dir_bh) |
| 1874 | { |
| 1875 | struct inode *orphan_dir_inode; |
| 1876 | struct buffer_head *orphan_dir_bh = NULL; |
| 1877 | int ret = 0; |
| 1878 | |
| 1879 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, |
| 1880 | ORPHAN_DIR_SYSTEM_INODE, |
| 1881 | osb->slot_num); |
| 1882 | if (!orphan_dir_inode) { |
| 1883 | ret = -ENOENT; |
| 1884 | mlog_errno(ret); |
| 1885 | return ret; |
| 1886 | } |
| 1887 | |
| 1888 | mutex_lock(&orphan_dir_inode->i_mutex); |
| 1889 | |
| 1890 | ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); |
| 1891 | if (ret < 0) { |
| 1892 | mutex_unlock(&orphan_dir_inode->i_mutex); |
| 1893 | iput(orphan_dir_inode); |
| 1894 | |
| 1895 | mlog_errno(ret); |
| 1896 | return ret; |
| 1897 | } |
| 1898 | |
| 1899 | *ret_orphan_dir = orphan_dir_inode; |
| 1900 | *ret_orphan_dir_bh = orphan_dir_bh; |
| 1901 | |
| 1902 | return 0; |
| 1903 | } |
| 1904 | |
| 1905 | static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, |
| 1906 | struct buffer_head *orphan_dir_bh, |
| 1907 | u64 blkno, |
| 1908 | char *name, |
| 1909 | struct ocfs2_dir_lookup_result *lookup) |
| 1910 | { |
| 1911 | int ret; |
| 1912 | struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); |
| 1913 | |
| 1914 | ret = ocfs2_blkno_stringify(blkno, name); |
| 1915 | if (ret < 0) { |
| 1916 | mlog_errno(ret); |
| 1917 | return ret; |
| 1918 | } |
| 1919 | |
| 1920 | ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, |
| 1921 | orphan_dir_bh, name, |
| 1922 | OCFS2_ORPHAN_NAMELEN, lookup); |
| 1923 | if (ret < 0) { |
| 1924 | mlog_errno(ret); |
| 1925 | return ret; |
| 1926 | } |
| 1927 | |
| 1928 | return 0; |
| 1929 | } |
| 1930 | |
| 1931 | /** |
| 1932 | * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for |
| 1933 | * insertion of an orphan. |
| 1934 | * @osb: ocfs2 file system |
| 1935 | * @ret_orphan_dir: Orphan dir inode - returned locked! |
| 1936 | * @blkno: Actual block number of the inode to be inserted into orphan dir. |
| 1937 | * @lookup: dir lookup result, to be passed back into functions like |
| 1938 | * ocfs2_orphan_add |
| 1939 | * |
| 1940 | * Returns zero on success and the ret_orphan_dir, name and lookup |
| 1941 | * fields will be populated. |
| 1942 | * |
| 1943 | * Returns non-zero on failure. |
| 1944 | */ |
| 1945 | static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, |
| 1946 | struct inode **ret_orphan_dir, |
| 1947 | u64 blkno, |
| 1948 | char *name, |
| 1949 | struct ocfs2_dir_lookup_result *lookup) |
| 1950 | { |
| 1951 | struct inode *orphan_dir_inode = NULL; |
| 1952 | struct buffer_head *orphan_dir_bh = NULL; |
| 1953 | int ret = 0; |
| 1954 | |
| 1955 | ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode, |
| 1956 | &orphan_dir_bh); |
| 1957 | if (ret < 0) { |
| 1958 | mlog_errno(ret); |
| 1959 | return ret; |
| 1960 | } |
| 1961 | |
| 1962 | ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh, |
| 1963 | blkno, name, lookup); |
| 1964 | if (ret < 0) { |
| 1965 | mlog_errno(ret); |
| 1966 | goto out; |
| 1967 | } |
| 1968 | |
| 1969 | *ret_orphan_dir = orphan_dir_inode; |
| 1970 | |
| 1971 | out: |
| 1972 | brelse(orphan_dir_bh); |
| 1973 | |
| 1974 | if (ret) { |
| 1975 | ocfs2_inode_unlock(orphan_dir_inode, 1); |
| 1976 | mutex_unlock(&orphan_dir_inode->i_mutex); |
| 1977 | iput(orphan_dir_inode); |
| 1978 | } |
| 1979 | |
| 1980 | if (ret) |
| 1981 | mlog_errno(ret); |
| 1982 | return ret; |
| 1983 | } |
| 1984 | |
| 1985 | static int ocfs2_orphan_add(struct ocfs2_super *osb, |
| 1986 | handle_t *handle, |
| 1987 | struct inode *inode, |
| 1988 | struct buffer_head *fe_bh, |
| 1989 | char *name, |
| 1990 | struct ocfs2_dir_lookup_result *lookup, |
| 1991 | struct inode *orphan_dir_inode) |
| 1992 | { |
| 1993 | struct buffer_head *orphan_dir_bh = NULL; |
| 1994 | int status = 0; |
| 1995 | struct ocfs2_dinode *orphan_fe; |
| 1996 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; |
| 1997 | |
| 1998 | trace_ocfs2_orphan_add_begin( |
| 1999 | (unsigned long long)OCFS2_I(inode)->ip_blkno); |
| 2000 | |
| 2001 | status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh); |
| 2002 | if (status < 0) { |
| 2003 | mlog_errno(status); |
| 2004 | goto leave; |
| 2005 | } |
| 2006 | |
| 2007 | status = ocfs2_journal_access_di(handle, |
| 2008 | INODE_CACHE(orphan_dir_inode), |
| 2009 | orphan_dir_bh, |
| 2010 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 2011 | if (status < 0) { |
| 2012 | mlog_errno(status); |
| 2013 | goto leave; |
| 2014 | } |
| 2015 | |
| 2016 | /* we're a cluster, and nlink can change on disk from |
| 2017 | * underneath us... */ |
| 2018 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; |
| 2019 | if (S_ISDIR(inode->i_mode)) |
| 2020 | ocfs2_add_links_count(orphan_fe, 1); |
| 2021 | orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe); |
| 2022 | ocfs2_journal_dirty(handle, orphan_dir_bh); |
| 2023 | |
| 2024 | status = __ocfs2_add_entry(handle, orphan_dir_inode, name, |
| 2025 | OCFS2_ORPHAN_NAMELEN, inode, |
| 2026 | OCFS2_I(inode)->ip_blkno, |
| 2027 | orphan_dir_bh, lookup); |
| 2028 | if (status < 0) { |
| 2029 | mlog_errno(status); |
| 2030 | goto leave; |
| 2031 | } |
| 2032 | |
| 2033 | /* |
| 2034 | * We're going to journal the change of i_flags and i_orphaned_slot. |
| 2035 | * It's safe anyway, though some callers may duplicate the journaling. |
| 2036 | * Journaling within the func just make the logic look more |
| 2037 | * straightforward. |
| 2038 | */ |
| 2039 | status = ocfs2_journal_access_di(handle, |
| 2040 | INODE_CACHE(inode), |
| 2041 | fe_bh, |
| 2042 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 2043 | if (status < 0) { |
| 2044 | mlog_errno(status); |
| 2045 | goto leave; |
| 2046 | } |
| 2047 | |
| 2048 | le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); |
| 2049 | OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR; |
| 2050 | |
| 2051 | /* Record which orphan dir our inode now resides |
| 2052 | * in. delete_inode will use this to determine which orphan |
| 2053 | * dir to lock. */ |
| 2054 | fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); |
| 2055 | |
| 2056 | ocfs2_journal_dirty(handle, fe_bh); |
| 2057 | |
| 2058 | trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 2059 | osb->slot_num); |
| 2060 | |
| 2061 | leave: |
| 2062 | brelse(orphan_dir_bh); |
| 2063 | |
| 2064 | if (status) |
| 2065 | mlog_errno(status); |
| 2066 | return status; |
| 2067 | } |
| 2068 | |
| 2069 | /* unlike orphan_add, we expect the orphan dir to already be locked here. */ |
| 2070 | int ocfs2_orphan_del(struct ocfs2_super *osb, |
| 2071 | handle_t *handle, |
| 2072 | struct inode *orphan_dir_inode, |
| 2073 | struct inode *inode, |
| 2074 | struct buffer_head *orphan_dir_bh) |
| 2075 | { |
| 2076 | char name[OCFS2_ORPHAN_NAMELEN + 1]; |
| 2077 | struct ocfs2_dinode *orphan_fe; |
| 2078 | int status = 0; |
| 2079 | struct ocfs2_dir_lookup_result lookup = { NULL, }; |
| 2080 | |
| 2081 | status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); |
| 2082 | if (status < 0) { |
| 2083 | mlog_errno(status); |
| 2084 | goto leave; |
| 2085 | } |
| 2086 | |
| 2087 | trace_ocfs2_orphan_del( |
| 2088 | (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, |
| 2089 | name, OCFS2_ORPHAN_NAMELEN); |
| 2090 | |
| 2091 | /* find it's spot in the orphan directory */ |
| 2092 | status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode, |
| 2093 | &lookup); |
| 2094 | if (status) { |
| 2095 | mlog_errno(status); |
| 2096 | goto leave; |
| 2097 | } |
| 2098 | |
| 2099 | /* remove it from the orphan directory */ |
| 2100 | status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup); |
| 2101 | if (status < 0) { |
| 2102 | mlog_errno(status); |
| 2103 | goto leave; |
| 2104 | } |
| 2105 | |
| 2106 | status = ocfs2_journal_access_di(handle, |
| 2107 | INODE_CACHE(orphan_dir_inode), |
| 2108 | orphan_dir_bh, |
| 2109 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 2110 | if (status < 0) { |
| 2111 | mlog_errno(status); |
| 2112 | goto leave; |
| 2113 | } |
| 2114 | |
| 2115 | /* do the i_nlink dance! :) */ |
| 2116 | orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; |
| 2117 | if (S_ISDIR(inode->i_mode)) |
| 2118 | ocfs2_add_links_count(orphan_fe, -1); |
| 2119 | orphan_dir_inode->i_nlink = ocfs2_read_links_count(orphan_fe); |
| 2120 | ocfs2_journal_dirty(handle, orphan_dir_bh); |
| 2121 | |
| 2122 | leave: |
| 2123 | ocfs2_free_dir_lookup_result(&lookup); |
| 2124 | |
| 2125 | if (status) |
| 2126 | mlog_errno(status); |
| 2127 | return status; |
| 2128 | } |
| 2129 | |
| 2130 | /** |
| 2131 | * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to recieve a newly |
| 2132 | * allocated file. This is different from the typical 'add to orphan dir' |
| 2133 | * operation in that the inode does not yet exist. This is a problem because |
| 2134 | * the orphan dir stringifies the inode block number to come up with it's |
| 2135 | * dirent. Obviously if the inode does not yet exist we have a chicken and egg |
| 2136 | * problem. This function works around it by calling deeper into the orphan |
| 2137 | * and suballoc code than other callers. Use this only by necessity. |
| 2138 | * @dir: The directory which this inode will ultimately wind up under - not the |
| 2139 | * orphan dir! |
| 2140 | * @dir_bh: buffer_head the @dir inode block |
| 2141 | * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled |
| 2142 | * with the string to be used for orphan dirent. Pass back to the orphan dir |
| 2143 | * code. |
| 2144 | * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan |
| 2145 | * dir code. |
| 2146 | * @ret_di_blkno: block number where the new inode will be allocated. |
| 2147 | * @orphan_insert: Dir insert context to be passed back into orphan dir code. |
| 2148 | * @ret_inode_ac: Inode alloc context to be passed back to the allocator. |
| 2149 | * |
| 2150 | * Returns zero on success and the ret_orphan_dir, name and lookup |
| 2151 | * fields will be populated. |
| 2152 | * |
| 2153 | * Returns non-zero on failure. |
| 2154 | */ |
| 2155 | static int ocfs2_prep_new_orphaned_file(struct inode *dir, |
| 2156 | struct buffer_head *dir_bh, |
| 2157 | char *orphan_name, |
| 2158 | struct inode **ret_orphan_dir, |
| 2159 | u64 *ret_di_blkno, |
| 2160 | struct ocfs2_dir_lookup_result *orphan_insert, |
| 2161 | struct ocfs2_alloc_context **ret_inode_ac) |
| 2162 | { |
| 2163 | int ret; |
| 2164 | u64 di_blkno; |
| 2165 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
| 2166 | struct inode *orphan_dir = NULL; |
| 2167 | struct buffer_head *orphan_dir_bh = NULL; |
| 2168 | struct ocfs2_alloc_context *inode_ac = NULL; |
| 2169 | |
| 2170 | ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); |
| 2171 | if (ret < 0) { |
| 2172 | mlog_errno(ret); |
| 2173 | return ret; |
| 2174 | } |
| 2175 | |
| 2176 | /* reserve an inode spot */ |
| 2177 | ret = ocfs2_reserve_new_inode(osb, &inode_ac); |
| 2178 | if (ret < 0) { |
| 2179 | if (ret != -ENOSPC) |
| 2180 | mlog_errno(ret); |
| 2181 | goto out; |
| 2182 | } |
| 2183 | |
| 2184 | ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, |
| 2185 | &di_blkno); |
| 2186 | if (ret) { |
| 2187 | mlog_errno(ret); |
| 2188 | goto out; |
| 2189 | } |
| 2190 | |
| 2191 | ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, |
| 2192 | di_blkno, orphan_name, orphan_insert); |
| 2193 | if (ret < 0) { |
| 2194 | mlog_errno(ret); |
| 2195 | goto out; |
| 2196 | } |
| 2197 | |
| 2198 | out: |
| 2199 | if (ret == 0) { |
| 2200 | *ret_orphan_dir = orphan_dir; |
| 2201 | *ret_di_blkno = di_blkno; |
| 2202 | *ret_inode_ac = inode_ac; |
| 2203 | /* |
| 2204 | * orphan_name and orphan_insert are already up to |
| 2205 | * date via prepare_orphan_dir |
| 2206 | */ |
| 2207 | } else { |
| 2208 | /* Unroll reserve_new_inode* */ |
| 2209 | if (inode_ac) |
| 2210 | ocfs2_free_alloc_context(inode_ac); |
| 2211 | |
| 2212 | /* Unroll orphan dir locking */ |
| 2213 | mutex_unlock(&orphan_dir->i_mutex); |
| 2214 | ocfs2_inode_unlock(orphan_dir, 1); |
| 2215 | iput(orphan_dir); |
| 2216 | } |
| 2217 | |
| 2218 | brelse(orphan_dir_bh); |
| 2219 | |
| 2220 | return 0; |
| 2221 | } |
| 2222 | |
| 2223 | int ocfs2_create_inode_in_orphan(struct inode *dir, |
| 2224 | int mode, |
| 2225 | struct inode **new_inode) |
| 2226 | { |
| 2227 | int status, did_quota_inode = 0; |
| 2228 | struct inode *inode = NULL; |
| 2229 | struct inode *orphan_dir = NULL; |
| 2230 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
| 2231 | struct ocfs2_dinode *di = NULL; |
| 2232 | handle_t *handle = NULL; |
| 2233 | char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; |
| 2234 | struct buffer_head *parent_di_bh = NULL; |
| 2235 | struct buffer_head *new_di_bh = NULL; |
| 2236 | struct ocfs2_alloc_context *inode_ac = NULL; |
| 2237 | struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; |
| 2238 | u64 uninitialized_var(di_blkno), suballoc_loc; |
| 2239 | u16 suballoc_bit; |
| 2240 | |
| 2241 | status = ocfs2_inode_lock(dir, &parent_di_bh, 1); |
| 2242 | if (status < 0) { |
| 2243 | if (status != -ENOENT) |
| 2244 | mlog_errno(status); |
| 2245 | return status; |
| 2246 | } |
| 2247 | |
| 2248 | status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh, |
| 2249 | orphan_name, &orphan_dir, |
| 2250 | &di_blkno, &orphan_insert, &inode_ac); |
| 2251 | if (status < 0) { |
| 2252 | if (status != -ENOSPC) |
| 2253 | mlog_errno(status); |
| 2254 | goto leave; |
| 2255 | } |
| 2256 | |
| 2257 | inode = ocfs2_get_init_inode(dir, mode); |
| 2258 | if (!inode) { |
| 2259 | status = -ENOMEM; |
| 2260 | mlog_errno(status); |
| 2261 | goto leave; |
| 2262 | } |
| 2263 | |
| 2264 | handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0)); |
| 2265 | if (IS_ERR(handle)) { |
| 2266 | status = PTR_ERR(handle); |
| 2267 | handle = NULL; |
| 2268 | mlog_errno(status); |
| 2269 | goto leave; |
| 2270 | } |
| 2271 | |
| 2272 | status = dquot_alloc_inode(inode); |
| 2273 | if (status) |
| 2274 | goto leave; |
| 2275 | did_quota_inode = 1; |
| 2276 | |
| 2277 | status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac, |
| 2278 | &suballoc_loc, |
| 2279 | &suballoc_bit, di_blkno); |
| 2280 | if (status < 0) { |
| 2281 | mlog_errno(status); |
| 2282 | goto leave; |
| 2283 | } |
| 2284 | |
| 2285 | inode->i_nlink = 0; |
| 2286 | /* do the real work now. */ |
| 2287 | status = __ocfs2_mknod_locked(dir, inode, |
| 2288 | 0, &new_di_bh, parent_di_bh, handle, |
| 2289 | inode_ac, di_blkno, suballoc_loc, |
| 2290 | suballoc_bit); |
| 2291 | if (status < 0) { |
| 2292 | mlog_errno(status); |
| 2293 | goto leave; |
| 2294 | } |
| 2295 | |
| 2296 | di = (struct ocfs2_dinode *)new_di_bh->b_data; |
| 2297 | status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, |
| 2298 | &orphan_insert, orphan_dir); |
| 2299 | if (status < 0) { |
| 2300 | mlog_errno(status); |
| 2301 | goto leave; |
| 2302 | } |
| 2303 | |
| 2304 | /* get open lock so that only nodes can't remove it from orphan dir. */ |
| 2305 | status = ocfs2_open_lock(inode); |
| 2306 | if (status < 0) |
| 2307 | mlog_errno(status); |
| 2308 | |
| 2309 | insert_inode_hash(inode); |
| 2310 | leave: |
| 2311 | if (status < 0 && did_quota_inode) |
| 2312 | dquot_free_inode(inode); |
| 2313 | if (handle) |
| 2314 | ocfs2_commit_trans(osb, handle); |
| 2315 | |
| 2316 | if (orphan_dir) { |
| 2317 | /* This was locked for us in ocfs2_prepare_orphan_dir() */ |
| 2318 | ocfs2_inode_unlock(orphan_dir, 1); |
| 2319 | mutex_unlock(&orphan_dir->i_mutex); |
| 2320 | iput(orphan_dir); |
| 2321 | } |
| 2322 | |
| 2323 | if ((status < 0) && inode) { |
| 2324 | clear_nlink(inode); |
| 2325 | iput(inode); |
| 2326 | } |
| 2327 | |
| 2328 | if (inode_ac) |
| 2329 | ocfs2_free_alloc_context(inode_ac); |
| 2330 | |
| 2331 | brelse(new_di_bh); |
| 2332 | |
| 2333 | if (!status) |
| 2334 | *new_inode = inode; |
| 2335 | |
| 2336 | ocfs2_free_dir_lookup_result(&orphan_insert); |
| 2337 | |
| 2338 | ocfs2_inode_unlock(dir, 1); |
| 2339 | brelse(parent_di_bh); |
| 2340 | return status; |
| 2341 | } |
| 2342 | |
| 2343 | int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, |
| 2344 | struct inode *inode, |
| 2345 | struct dentry *dentry) |
| 2346 | { |
| 2347 | int status = 0; |
| 2348 | struct buffer_head *parent_di_bh = NULL; |
| 2349 | handle_t *handle = NULL; |
| 2350 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
| 2351 | struct ocfs2_dinode *dir_di, *di; |
| 2352 | struct inode *orphan_dir_inode = NULL; |
| 2353 | struct buffer_head *orphan_dir_bh = NULL; |
| 2354 | struct buffer_head *di_bh = NULL; |
| 2355 | struct ocfs2_dir_lookup_result lookup = { NULL, }; |
| 2356 | |
| 2357 | trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry, |
| 2358 | dentry->d_name.len, dentry->d_name.name, |
| 2359 | (unsigned long long)OCFS2_I(dir)->ip_blkno, |
| 2360 | (unsigned long long)OCFS2_I(inode)->ip_blkno); |
| 2361 | |
| 2362 | status = ocfs2_inode_lock(dir, &parent_di_bh, 1); |
| 2363 | if (status < 0) { |
| 2364 | if (status != -ENOENT) |
| 2365 | mlog_errno(status); |
| 2366 | return status; |
| 2367 | } |
| 2368 | |
| 2369 | dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data; |
| 2370 | if (!dir_di->i_links_count) { |
| 2371 | /* can't make a file in a deleted directory. */ |
| 2372 | status = -ENOENT; |
| 2373 | goto leave; |
| 2374 | } |
| 2375 | |
| 2376 | status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
| 2377 | dentry->d_name.len); |
| 2378 | if (status) |
| 2379 | goto leave; |
| 2380 | |
| 2381 | /* get a spot inside the dir. */ |
| 2382 | status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh, |
| 2383 | dentry->d_name.name, |
| 2384 | dentry->d_name.len, &lookup); |
| 2385 | if (status < 0) { |
| 2386 | mlog_errno(status); |
| 2387 | goto leave; |
| 2388 | } |
| 2389 | |
| 2390 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, |
| 2391 | ORPHAN_DIR_SYSTEM_INODE, |
| 2392 | osb->slot_num); |
| 2393 | if (!orphan_dir_inode) { |
| 2394 | status = -EEXIST; |
| 2395 | mlog_errno(status); |
| 2396 | goto leave; |
| 2397 | } |
| 2398 | |
| 2399 | mutex_lock(&orphan_dir_inode->i_mutex); |
| 2400 | |
| 2401 | status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); |
| 2402 | if (status < 0) { |
| 2403 | mlog_errno(status); |
| 2404 | mutex_unlock(&orphan_dir_inode->i_mutex); |
| 2405 | iput(orphan_dir_inode); |
| 2406 | goto leave; |
| 2407 | } |
| 2408 | |
| 2409 | status = ocfs2_read_inode_block(inode, &di_bh); |
| 2410 | if (status < 0) { |
| 2411 | mlog_errno(status); |
| 2412 | goto orphan_unlock; |
| 2413 | } |
| 2414 | |
| 2415 | handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb)); |
| 2416 | if (IS_ERR(handle)) { |
| 2417 | status = PTR_ERR(handle); |
| 2418 | handle = NULL; |
| 2419 | mlog_errno(status); |
| 2420 | goto orphan_unlock; |
| 2421 | } |
| 2422 | |
| 2423 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), |
| 2424 | di_bh, OCFS2_JOURNAL_ACCESS_WRITE); |
| 2425 | if (status < 0) { |
| 2426 | mlog_errno(status); |
| 2427 | goto out_commit; |
| 2428 | } |
| 2429 | |
| 2430 | status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, |
| 2431 | orphan_dir_bh); |
| 2432 | if (status < 0) { |
| 2433 | mlog_errno(status); |
| 2434 | goto out_commit; |
| 2435 | } |
| 2436 | |
| 2437 | di = (struct ocfs2_dinode *)di_bh->b_data; |
| 2438 | le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL); |
| 2439 | di->i_orphaned_slot = 0; |
| 2440 | inode->i_nlink = 1; |
| 2441 | ocfs2_set_links_count(di, inode->i_nlink); |
| 2442 | ocfs2_journal_dirty(handle, di_bh); |
| 2443 | |
| 2444 | status = ocfs2_add_entry(handle, dentry, inode, |
| 2445 | OCFS2_I(inode)->ip_blkno, parent_di_bh, |
| 2446 | &lookup); |
| 2447 | if (status < 0) { |
| 2448 | mlog_errno(status); |
| 2449 | goto out_commit; |
| 2450 | } |
| 2451 | |
| 2452 | status = ocfs2_dentry_attach_lock(dentry, inode, |
| 2453 | OCFS2_I(dir)->ip_blkno); |
| 2454 | if (status) { |
| 2455 | mlog_errno(status); |
| 2456 | goto out_commit; |
| 2457 | } |
| 2458 | |
| 2459 | d_instantiate(dentry, inode); |
| 2460 | status = 0; |
| 2461 | out_commit: |
| 2462 | ocfs2_commit_trans(osb, handle); |
| 2463 | orphan_unlock: |
| 2464 | ocfs2_inode_unlock(orphan_dir_inode, 1); |
| 2465 | mutex_unlock(&orphan_dir_inode->i_mutex); |
| 2466 | iput(orphan_dir_inode); |
| 2467 | leave: |
| 2468 | |
| 2469 | ocfs2_inode_unlock(dir, 1); |
| 2470 | |
| 2471 | brelse(di_bh); |
| 2472 | brelse(parent_di_bh); |
| 2473 | brelse(orphan_dir_bh); |
| 2474 | |
| 2475 | ocfs2_free_dir_lookup_result(&lookup); |
| 2476 | |
| 2477 | if (status) |
| 2478 | mlog_errno(status); |
| 2479 | |
| 2480 | return status; |
| 2481 | } |
| 2482 | |
| 2483 | const struct inode_operations ocfs2_dir_iops = { |
| 2484 | .create = ocfs2_create, |
| 2485 | .lookup = ocfs2_lookup, |
| 2486 | .link = ocfs2_link, |
| 2487 | .unlink = ocfs2_unlink, |
| 2488 | .rmdir = ocfs2_unlink, |
| 2489 | .symlink = ocfs2_symlink, |
| 2490 | .mkdir = ocfs2_mkdir, |
| 2491 | .mknod = ocfs2_mknod, |
| 2492 | .rename = ocfs2_rename, |
| 2493 | .setattr = ocfs2_setattr, |
| 2494 | .getattr = ocfs2_getattr, |
| 2495 | .permission = ocfs2_permission, |
| 2496 | .setxattr = generic_setxattr, |
| 2497 | .getxattr = generic_getxattr, |
| 2498 | .listxattr = ocfs2_listxattr, |
| 2499 | .removexattr = generic_removexattr, |
| 2500 | .fiemap = ocfs2_fiemap, |
| 2501 | }; |