Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) International Business Machines Corp., 2000-2004 |
| 3 | * Portions Copyright (C) Christoph Hellwig, 2001-2002 |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 13 | * the GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | |
| 20 | #include <linux/fs.h> |
| 21 | #include <linux/ctype.h> |
| 22 | #include <linux/quotaops.h> |
| 23 | #include "jfs_incore.h" |
| 24 | #include "jfs_superblock.h" |
| 25 | #include "jfs_inode.h" |
| 26 | #include "jfs_dinode.h" |
| 27 | #include "jfs_dmap.h" |
| 28 | #include "jfs_unicode.h" |
| 29 | #include "jfs_metapage.h" |
| 30 | #include "jfs_xattr.h" |
| 31 | #include "jfs_acl.h" |
| 32 | #include "jfs_debug.h" |
| 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | /* |
| 35 | * forward references |
| 36 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | struct dentry_operations jfs_ci_dentry_operations; |
| 38 | |
| 39 | static s64 commitZeroLink(tid_t, struct inode *); |
| 40 | |
| 41 | /* |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 42 | * NAME: free_ea_wmap(inode) |
| 43 | * |
| 44 | * FUNCTION: free uncommitted extended attributes from working map |
| 45 | * |
| 46 | */ |
| 47 | static inline void free_ea_wmap(struct inode *inode) |
| 48 | { |
| 49 | dxd_t *ea = &JFS_IP(inode)->ea; |
| 50 | |
| 51 | if (ea->flag & DXD_EXTENT) { |
| 52 | /* free EA pages from cache */ |
| 53 | invalidate_dxd_metapages(inode, *ea); |
| 54 | dbFree(inode, addressDXD(ea), lengthDXD(ea)); |
| 55 | } |
| 56 | ea->flag = 0; |
| 57 | } |
| 58 | |
| 59 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | * NAME: jfs_create(dip, dentry, mode) |
| 61 | * |
| 62 | * FUNCTION: create a regular file in the parent directory <dip> |
| 63 | * with name = <from dentry> and mode = <mode> |
| 64 | * |
| 65 | * PARAMETER: dip - parent directory vnode |
| 66 | * dentry - dentry of new file |
| 67 | * mode - create mode (rwxrwxrwx). |
| 68 | * nd- nd struct |
| 69 | * |
| 70 | * RETURN: Errors from subroutines |
| 71 | * |
| 72 | */ |
| 73 | static int jfs_create(struct inode *dip, struct dentry *dentry, int mode, |
| 74 | struct nameidata *nd) |
| 75 | { |
| 76 | int rc = 0; |
| 77 | tid_t tid; /* transaction id */ |
| 78 | struct inode *ip = NULL; /* child directory inode */ |
| 79 | ino_t ino; |
| 80 | struct component_name dname; /* child directory name */ |
| 81 | struct btstack btstack; |
| 82 | struct inode *iplist[2]; |
| 83 | struct tblock *tblk; |
| 84 | |
| 85 | jfs_info("jfs_create: dip:0x%p name:%s", dip, dentry->d_name.name); |
| 86 | |
| 87 | /* |
| 88 | * search parent directory for entry/freespace |
| 89 | * (dtSearch() returns parent directory page pinned) |
| 90 | */ |
| 91 | if ((rc = get_UCSname(&dname, dentry))) |
| 92 | goto out1; |
| 93 | |
| 94 | /* |
| 95 | * Either iAlloc() or txBegin() may block. Deadlock can occur if we |
| 96 | * block there while holding dtree page, so we allocate the inode & |
| 97 | * begin the transaction before we search the directory. |
| 98 | */ |
| 99 | ip = ialloc(dip, mode); |
| 100 | if (ip == NULL) { |
| 101 | rc = -ENOSPC; |
| 102 | goto out2; |
| 103 | } |
| 104 | |
| 105 | tid = txBegin(dip->i_sb, 0); |
| 106 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 107 | mutex_lock(&JFS_IP(dip)->commit_mutex); |
| 108 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 110 | rc = jfs_init_acl(tid, ip, dip); |
| 111 | if (rc) |
| 112 | goto out3; |
| 113 | |
Dave Kleikamp | 1d15b10 | 2005-09-01 09:05:39 -0500 | [diff] [blame] | 114 | rc = jfs_init_security(tid, ip, dip); |
| 115 | if (rc) { |
| 116 | txAbort(tid, 0); |
| 117 | goto out3; |
| 118 | } |
| 119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
| 121 | jfs_err("jfs_create: dtSearch returned %d", rc); |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 122 | txAbort(tid, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | goto out3; |
| 124 | } |
| 125 | |
| 126 | tblk = tid_to_tblock(tid); |
| 127 | tblk->xflag |= COMMIT_CREATE; |
| 128 | tblk->ino = ip->i_ino; |
| 129 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; |
| 130 | |
| 131 | iplist[0] = dip; |
| 132 | iplist[1] = ip; |
| 133 | |
| 134 | /* |
| 135 | * initialize the child XAD tree root in-line in inode |
| 136 | */ |
| 137 | xtInitRoot(tid, ip); |
| 138 | |
| 139 | /* |
| 140 | * create entry in parent directory for child directory |
| 141 | * (dtInsert() releases parent directory page) |
| 142 | */ |
| 143 | ino = ip->i_ino; |
| 144 | if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { |
| 145 | if (rc == -EIO) { |
| 146 | jfs_err("jfs_create: dtInsert returned -EIO"); |
| 147 | txAbort(tid, 1); /* Marks Filesystem dirty */ |
| 148 | } else |
| 149 | txAbort(tid, 0); /* Filesystem full */ |
| 150 | goto out3; |
| 151 | } |
| 152 | |
| 153 | ip->i_op = &jfs_file_inode_operations; |
| 154 | ip->i_fop = &jfs_file_operations; |
| 155 | ip->i_mapping->a_ops = &jfs_aops; |
| 156 | |
| 157 | insert_inode_hash(ip); |
| 158 | mark_inode_dirty(ip); |
| 159 | |
| 160 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
| 161 | |
| 162 | mark_inode_dirty(dip); |
| 163 | |
| 164 | rc = txCommit(tid, 2, &iplist[0], 0); |
| 165 | |
| 166 | out3: |
| 167 | txEnd(tid); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 168 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| 169 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | if (rc) { |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 171 | free_ea_wmap(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | ip->i_nlink = 0; |
| 173 | iput(ip); |
| 174 | } else |
| 175 | d_instantiate(dentry, ip); |
| 176 | |
| 177 | out2: |
| 178 | free_UCSname(&dname); |
| 179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | out1: |
| 181 | |
| 182 | jfs_info("jfs_create: rc:%d", rc); |
| 183 | return rc; |
| 184 | } |
| 185 | |
| 186 | |
| 187 | /* |
| 188 | * NAME: jfs_mkdir(dip, dentry, mode) |
| 189 | * |
| 190 | * FUNCTION: create a child directory in the parent directory <dip> |
| 191 | * with name = <from dentry> and mode = <mode> |
| 192 | * |
| 193 | * PARAMETER: dip - parent directory vnode |
| 194 | * dentry - dentry of child directory |
| 195 | * mode - create mode (rwxrwxrwx). |
| 196 | * |
| 197 | * RETURN: Errors from subroutines |
| 198 | * |
| 199 | * note: |
| 200 | * EACCESS: user needs search+write permission on the parent directory |
| 201 | */ |
| 202 | static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode) |
| 203 | { |
| 204 | int rc = 0; |
| 205 | tid_t tid; /* transaction id */ |
| 206 | struct inode *ip = NULL; /* child directory inode */ |
| 207 | ino_t ino; |
| 208 | struct component_name dname; /* child directory name */ |
| 209 | struct btstack btstack; |
| 210 | struct inode *iplist[2]; |
| 211 | struct tblock *tblk; |
| 212 | |
| 213 | jfs_info("jfs_mkdir: dip:0x%p name:%s", dip, dentry->d_name.name); |
| 214 | |
| 215 | /* link count overflow on parent directory ? */ |
| 216 | if (dip->i_nlink == JFS_LINK_MAX) { |
| 217 | rc = -EMLINK; |
| 218 | goto out1; |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * search parent directory for entry/freespace |
| 223 | * (dtSearch() returns parent directory page pinned) |
| 224 | */ |
| 225 | if ((rc = get_UCSname(&dname, dentry))) |
| 226 | goto out1; |
| 227 | |
| 228 | /* |
| 229 | * Either iAlloc() or txBegin() may block. Deadlock can occur if we |
| 230 | * block there while holding dtree page, so we allocate the inode & |
| 231 | * begin the transaction before we search the directory. |
| 232 | */ |
| 233 | ip = ialloc(dip, S_IFDIR | mode); |
| 234 | if (ip == NULL) { |
| 235 | rc = -ENOSPC; |
| 236 | goto out2; |
| 237 | } |
| 238 | |
| 239 | tid = txBegin(dip->i_sb, 0); |
| 240 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 241 | mutex_lock(&JFS_IP(dip)->commit_mutex); |
| 242 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 244 | rc = jfs_init_acl(tid, ip, dip); |
| 245 | if (rc) |
| 246 | goto out3; |
| 247 | |
Dave Kleikamp | 1d15b10 | 2005-09-01 09:05:39 -0500 | [diff] [blame] | 248 | rc = jfs_init_security(tid, ip, dip); |
| 249 | if (rc) { |
| 250 | txAbort(tid, 0); |
| 251 | goto out3; |
| 252 | } |
| 253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
| 255 | jfs_err("jfs_mkdir: dtSearch returned %d", rc); |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 256 | txAbort(tid, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | goto out3; |
| 258 | } |
| 259 | |
| 260 | tblk = tid_to_tblock(tid); |
| 261 | tblk->xflag |= COMMIT_CREATE; |
| 262 | tblk->ino = ip->i_ino; |
| 263 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; |
| 264 | |
| 265 | iplist[0] = dip; |
| 266 | iplist[1] = ip; |
| 267 | |
| 268 | /* |
| 269 | * initialize the child directory in-line in inode |
| 270 | */ |
| 271 | dtInitRoot(tid, ip, dip->i_ino); |
| 272 | |
| 273 | /* |
| 274 | * create entry in parent directory for child directory |
| 275 | * (dtInsert() releases parent directory page) |
| 276 | */ |
| 277 | ino = ip->i_ino; |
| 278 | if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { |
| 279 | if (rc == -EIO) { |
| 280 | jfs_err("jfs_mkdir: dtInsert returned -EIO"); |
| 281 | txAbort(tid, 1); /* Marks Filesystem dirty */ |
| 282 | } else |
| 283 | txAbort(tid, 0); /* Filesystem full */ |
| 284 | goto out3; |
| 285 | } |
| 286 | |
| 287 | ip->i_nlink = 2; /* for '.' */ |
| 288 | ip->i_op = &jfs_dir_inode_operations; |
| 289 | ip->i_fop = &jfs_dir_operations; |
| 290 | |
| 291 | insert_inode_hash(ip); |
| 292 | mark_inode_dirty(ip); |
| 293 | |
| 294 | /* update parent directory inode */ |
| 295 | dip->i_nlink++; /* for '..' from child directory */ |
| 296 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
| 297 | mark_inode_dirty(dip); |
| 298 | |
| 299 | rc = txCommit(tid, 2, &iplist[0], 0); |
| 300 | |
| 301 | out3: |
| 302 | txEnd(tid); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 303 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| 304 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | if (rc) { |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 306 | free_ea_wmap(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | ip->i_nlink = 0; |
| 308 | iput(ip); |
| 309 | } else |
| 310 | d_instantiate(dentry, ip); |
| 311 | |
| 312 | out2: |
| 313 | free_UCSname(&dname); |
| 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | out1: |
| 317 | |
| 318 | jfs_info("jfs_mkdir: rc:%d", rc); |
| 319 | return rc; |
| 320 | } |
| 321 | |
| 322 | /* |
| 323 | * NAME: jfs_rmdir(dip, dentry) |
| 324 | * |
| 325 | * FUNCTION: remove a link to child directory |
| 326 | * |
| 327 | * PARAMETER: dip - parent inode |
| 328 | * dentry - child directory dentry |
| 329 | * |
| 330 | * RETURN: -EINVAL - if name is . or .. |
| 331 | * -EINVAL - if . or .. exist but are invalid. |
| 332 | * errors from subroutines |
| 333 | * |
| 334 | * note: |
| 335 | * if other threads have the directory open when the last link |
| 336 | * is removed, the "." and ".." entries, if present, are removed before |
| 337 | * rmdir() returns and no new entries may be created in the directory, |
| 338 | * but the directory is not removed until the last reference to |
| 339 | * the directory is released (cf.unlink() of regular file). |
| 340 | */ |
| 341 | static int jfs_rmdir(struct inode *dip, struct dentry *dentry) |
| 342 | { |
| 343 | int rc; |
| 344 | tid_t tid; /* transaction id */ |
| 345 | struct inode *ip = dentry->d_inode; |
| 346 | ino_t ino; |
| 347 | struct component_name dname; |
| 348 | struct inode *iplist[2]; |
| 349 | struct tblock *tblk; |
| 350 | |
| 351 | jfs_info("jfs_rmdir: dip:0x%p name:%s", dip, dentry->d_name.name); |
| 352 | |
| 353 | /* Init inode for quota operations. */ |
| 354 | DQUOT_INIT(ip); |
| 355 | |
| 356 | /* directory must be empty to be removed */ |
| 357 | if (!dtEmpty(ip)) { |
| 358 | rc = -ENOTEMPTY; |
| 359 | goto out; |
| 360 | } |
| 361 | |
| 362 | if ((rc = get_UCSname(&dname, dentry))) { |
| 363 | goto out; |
| 364 | } |
| 365 | |
| 366 | tid = txBegin(dip->i_sb, 0); |
| 367 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 368 | mutex_lock(&JFS_IP(dip)->commit_mutex); |
| 369 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
| 371 | iplist[0] = dip; |
| 372 | iplist[1] = ip; |
| 373 | |
| 374 | tblk = tid_to_tblock(tid); |
| 375 | tblk->xflag |= COMMIT_DELETE; |
| 376 | tblk->u.ip = ip; |
| 377 | |
| 378 | /* |
| 379 | * delete the entry of target directory from parent directory |
| 380 | */ |
| 381 | ino = ip->i_ino; |
| 382 | if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { |
| 383 | jfs_err("jfs_rmdir: dtDelete returned %d", rc); |
| 384 | if (rc == -EIO) |
| 385 | txAbort(tid, 1); |
| 386 | txEnd(tid); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 387 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| 388 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
| 390 | goto out2; |
| 391 | } |
| 392 | |
| 393 | /* update parent directory's link count corresponding |
| 394 | * to ".." entry of the target directory deleted |
| 395 | */ |
| 396 | dip->i_nlink--; |
| 397 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
| 398 | mark_inode_dirty(dip); |
| 399 | |
| 400 | /* |
| 401 | * OS/2 could have created EA and/or ACL |
| 402 | */ |
| 403 | /* free EA from both persistent and working map */ |
| 404 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { |
| 405 | /* free EA pages */ |
| 406 | txEA(tid, ip, &JFS_IP(ip)->ea, NULL); |
| 407 | } |
| 408 | JFS_IP(ip)->ea.flag = 0; |
| 409 | |
| 410 | /* free ACL from both persistent and working map */ |
| 411 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { |
| 412 | /* free ACL pages */ |
| 413 | txEA(tid, ip, &JFS_IP(ip)->acl, NULL); |
| 414 | } |
| 415 | JFS_IP(ip)->acl.flag = 0; |
| 416 | |
| 417 | /* mark the target directory as deleted */ |
| 418 | ip->i_nlink = 0; |
| 419 | mark_inode_dirty(ip); |
| 420 | |
| 421 | rc = txCommit(tid, 2, &iplist[0], 0); |
| 422 | |
| 423 | txEnd(tid); |
| 424 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 425 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| 426 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
| 428 | /* |
| 429 | * Truncating the directory index table is not guaranteed. It |
| 430 | * may need to be done iteratively |
| 431 | */ |
| 432 | if (test_cflag(COMMIT_Stale, dip)) { |
| 433 | if (dip->i_size > 1) |
| 434 | jfs_truncate_nolock(dip, 0); |
| 435 | |
| 436 | clear_cflag(COMMIT_Stale, dip); |
| 437 | } |
| 438 | |
| 439 | out2: |
| 440 | free_UCSname(&dname); |
| 441 | |
| 442 | out: |
| 443 | jfs_info("jfs_rmdir: rc:%d", rc); |
| 444 | return rc; |
| 445 | } |
| 446 | |
| 447 | /* |
| 448 | * NAME: jfs_unlink(dip, dentry) |
| 449 | * |
| 450 | * FUNCTION: remove a link to object <vp> named by <name> |
| 451 | * from parent directory <dvp> |
| 452 | * |
| 453 | * PARAMETER: dip - inode of parent directory |
| 454 | * dentry - dentry of object to be removed |
| 455 | * |
| 456 | * RETURN: errors from subroutines |
| 457 | * |
| 458 | * note: |
| 459 | * temporary file: if one or more processes have the file open |
| 460 | * when the last link is removed, the link will be removed before |
| 461 | * unlink() returns, but the removal of the file contents will be |
| 462 | * postponed until all references to the files are closed. |
| 463 | * |
| 464 | * JFS does NOT support unlink() on directories. |
| 465 | * |
| 466 | */ |
| 467 | static int jfs_unlink(struct inode *dip, struct dentry *dentry) |
| 468 | { |
| 469 | int rc; |
| 470 | tid_t tid; /* transaction id */ |
| 471 | struct inode *ip = dentry->d_inode; |
| 472 | ino_t ino; |
| 473 | struct component_name dname; /* object name */ |
| 474 | struct inode *iplist[2]; |
| 475 | struct tblock *tblk; |
| 476 | s64 new_size = 0; |
| 477 | int commit_flag; |
| 478 | |
| 479 | jfs_info("jfs_unlink: dip:0x%p name:%s", dip, dentry->d_name.name); |
| 480 | |
| 481 | /* Init inode for quota operations. */ |
| 482 | DQUOT_INIT(ip); |
| 483 | |
| 484 | if ((rc = get_UCSname(&dname, dentry))) |
| 485 | goto out; |
| 486 | |
| 487 | IWRITE_LOCK(ip); |
| 488 | |
| 489 | tid = txBegin(dip->i_sb, 0); |
| 490 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 491 | mutex_lock(&JFS_IP(dip)->commit_mutex); |
| 492 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | |
| 494 | iplist[0] = dip; |
| 495 | iplist[1] = ip; |
| 496 | |
| 497 | /* |
| 498 | * delete the entry of target file from parent directory |
| 499 | */ |
| 500 | ino = ip->i_ino; |
| 501 | if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { |
| 502 | jfs_err("jfs_unlink: dtDelete returned %d", rc); |
| 503 | if (rc == -EIO) |
| 504 | txAbort(tid, 1); /* Marks FS Dirty */ |
| 505 | txEnd(tid); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 506 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| 507 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | IWRITE_UNLOCK(ip); |
| 509 | goto out1; |
| 510 | } |
| 511 | |
| 512 | ASSERT(ip->i_nlink); |
| 513 | |
| 514 | ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
| 515 | mark_inode_dirty(dip); |
| 516 | |
| 517 | /* update target's inode */ |
| 518 | ip->i_nlink--; |
| 519 | mark_inode_dirty(ip); |
| 520 | |
| 521 | /* |
| 522 | * commit zero link count object |
| 523 | */ |
| 524 | if (ip->i_nlink == 0) { |
| 525 | assert(!test_cflag(COMMIT_Nolink, ip)); |
| 526 | /* free block resources */ |
| 527 | if ((new_size = commitZeroLink(tid, ip)) < 0) { |
| 528 | txAbort(tid, 1); /* Marks FS Dirty */ |
| 529 | txEnd(tid); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 530 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| 531 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | IWRITE_UNLOCK(ip); |
| 533 | rc = new_size; |
| 534 | goto out1; |
| 535 | } |
| 536 | tblk = tid_to_tblock(tid); |
| 537 | tblk->xflag |= COMMIT_DELETE; |
| 538 | tblk->u.ip = ip; |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * Incomplete truncate of file data can |
| 543 | * result in timing problems unless we synchronously commit the |
| 544 | * transaction. |
| 545 | */ |
| 546 | if (new_size) |
| 547 | commit_flag = COMMIT_SYNC; |
| 548 | else |
| 549 | commit_flag = 0; |
| 550 | |
| 551 | /* |
| 552 | * If xtTruncate was incomplete, commit synchronously to avoid |
| 553 | * timing complications |
| 554 | */ |
| 555 | rc = txCommit(tid, 2, &iplist[0], commit_flag); |
| 556 | |
| 557 | txEnd(tid); |
| 558 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 559 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| 560 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | |
| 562 | |
| 563 | while (new_size && (rc == 0)) { |
| 564 | tid = txBegin(dip->i_sb, 0); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 565 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | new_size = xtTruncate_pmap(tid, ip, new_size); |
| 567 | if (new_size < 0) { |
| 568 | txAbort(tid, 1); /* Marks FS Dirty */ |
| 569 | rc = new_size; |
| 570 | } else |
| 571 | rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC); |
| 572 | txEnd(tid); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 573 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | |
| 576 | if (ip->i_nlink == 0) |
| 577 | set_cflag(COMMIT_Nolink, ip); |
| 578 | |
| 579 | IWRITE_UNLOCK(ip); |
| 580 | |
| 581 | /* |
| 582 | * Truncating the directory index table is not guaranteed. It |
| 583 | * may need to be done iteratively |
| 584 | */ |
| 585 | if (test_cflag(COMMIT_Stale, dip)) { |
| 586 | if (dip->i_size > 1) |
| 587 | jfs_truncate_nolock(dip, 0); |
| 588 | |
| 589 | clear_cflag(COMMIT_Stale, dip); |
| 590 | } |
| 591 | |
| 592 | out1: |
| 593 | free_UCSname(&dname); |
| 594 | out: |
| 595 | jfs_info("jfs_unlink: rc:%d", rc); |
| 596 | return rc; |
| 597 | } |
| 598 | |
| 599 | /* |
| 600 | * NAME: commitZeroLink() |
| 601 | * |
| 602 | * FUNCTION: for non-directory, called by jfs_remove(), |
| 603 | * truncate a regular file, directory or symbolic |
| 604 | * link to zero length. return 0 if type is not |
| 605 | * one of these. |
| 606 | * |
| 607 | * if the file is currently associated with a VM segment |
| 608 | * only permanent disk and inode map resources are freed, |
| 609 | * and neither the inode nor indirect blocks are modified |
| 610 | * so that the resources can be later freed in the work |
| 611 | * map by ctrunc1. |
| 612 | * if there is no VM segment on entry, the resources are |
| 613 | * freed in both work and permanent map. |
| 614 | * (? for temporary file - memory object is cached even |
| 615 | * after no reference: |
| 616 | * reference count > 0 - ) |
| 617 | * |
| 618 | * PARAMETERS: cd - pointer to commit data structure. |
| 619 | * current inode is the one to truncate. |
| 620 | * |
| 621 | * RETURN: Errors from subroutines |
| 622 | */ |
| 623 | static s64 commitZeroLink(tid_t tid, struct inode *ip) |
| 624 | { |
| 625 | int filetype; |
| 626 | struct tblock *tblk; |
| 627 | |
| 628 | jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid, ip); |
| 629 | |
| 630 | filetype = ip->i_mode & S_IFMT; |
| 631 | switch (filetype) { |
| 632 | case S_IFREG: |
| 633 | break; |
| 634 | case S_IFLNK: |
| 635 | /* fast symbolic link */ |
| 636 | if (ip->i_size < IDATASIZE) { |
| 637 | ip->i_size = 0; |
| 638 | return 0; |
| 639 | } |
| 640 | break; |
| 641 | default: |
| 642 | assert(filetype != S_IFDIR); |
| 643 | return 0; |
| 644 | } |
| 645 | |
| 646 | set_cflag(COMMIT_Freewmap, ip); |
| 647 | |
| 648 | /* mark transaction of block map update type */ |
| 649 | tblk = tid_to_tblock(tid); |
| 650 | tblk->xflag |= COMMIT_PMAP; |
| 651 | |
| 652 | /* |
| 653 | * free EA |
| 654 | */ |
| 655 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) |
| 656 | /* acquire maplock on EA to be freed from block map */ |
| 657 | txEA(tid, ip, &JFS_IP(ip)->ea, NULL); |
| 658 | |
| 659 | /* |
| 660 | * free ACL |
| 661 | */ |
| 662 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) |
| 663 | /* acquire maplock on EA to be freed from block map */ |
| 664 | txEA(tid, ip, &JFS_IP(ip)->acl, NULL); |
| 665 | |
| 666 | /* |
| 667 | * free xtree/data (truncate to zero length): |
| 668 | * free xtree/data pages from cache if COMMIT_PWMAP, |
| 669 | * free xtree/data blocks from persistent block map, and |
| 670 | * free xtree/data blocks from working block map if COMMIT_PWMAP; |
| 671 | */ |
| 672 | if (ip->i_size) |
| 673 | return xtTruncate_pmap(tid, ip, 0); |
| 674 | |
| 675 | return 0; |
| 676 | } |
| 677 | |
| 678 | |
| 679 | /* |
Dave Kleikamp | 1868f4a | 2005-05-04 15:29:35 -0500 | [diff] [blame] | 680 | * NAME: jfs_free_zero_link() |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | * |
| 682 | * FUNCTION: for non-directory, called by iClose(), |
| 683 | * free resources of a file from cache and WORKING map |
| 684 | * for a file previously committed with zero link count |
| 685 | * while associated with a pager object, |
| 686 | * |
| 687 | * PARAMETER: ip - pointer to inode of file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | */ |
Dave Kleikamp | 1868f4a | 2005-05-04 15:29:35 -0500 | [diff] [blame] | 689 | void jfs_free_zero_link(struct inode *ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | int type; |
| 692 | |
Dave Kleikamp | 1868f4a | 2005-05-04 15:29:35 -0500 | [diff] [blame] | 693 | jfs_info("jfs_free_zero_link: ip = 0x%p", ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
| 695 | /* return if not reg or symbolic link or if size is |
| 696 | * already ok. |
| 697 | */ |
| 698 | type = ip->i_mode & S_IFMT; |
| 699 | |
| 700 | switch (type) { |
| 701 | case S_IFREG: |
| 702 | break; |
| 703 | case S_IFLNK: |
| 704 | /* if its contained in inode nothing to do */ |
| 705 | if (ip->i_size < IDATASIZE) |
Dave Kleikamp | 1868f4a | 2005-05-04 15:29:35 -0500 | [diff] [blame] | 706 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | break; |
| 708 | default: |
Dave Kleikamp | 1868f4a | 2005-05-04 15:29:35 -0500 | [diff] [blame] | 709 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | } |
| 711 | |
| 712 | /* |
| 713 | * free EA |
| 714 | */ |
| 715 | if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { |
| 716 | s64 xaddr = addressDXD(&JFS_IP(ip)->ea); |
| 717 | int xlen = lengthDXD(&JFS_IP(ip)->ea); |
| 718 | struct maplock maplock; /* maplock for COMMIT_WMAP */ |
| 719 | struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ |
| 720 | |
| 721 | /* free EA pages from cache */ |
| 722 | invalidate_dxd_metapages(ip, JFS_IP(ip)->ea); |
| 723 | |
| 724 | /* free EA extent from working block map */ |
| 725 | maplock.index = 1; |
| 726 | pxdlock = (struct pxd_lock *) & maplock; |
| 727 | pxdlock->flag = mlckFREEPXD; |
| 728 | PXDaddress(&pxdlock->pxd, xaddr); |
| 729 | PXDlength(&pxdlock->pxd, xlen); |
| 730 | txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * free ACL |
| 735 | */ |
| 736 | if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { |
| 737 | s64 xaddr = addressDXD(&JFS_IP(ip)->acl); |
| 738 | int xlen = lengthDXD(&JFS_IP(ip)->acl); |
| 739 | struct maplock maplock; /* maplock for COMMIT_WMAP */ |
| 740 | struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ |
| 741 | |
| 742 | invalidate_dxd_metapages(ip, JFS_IP(ip)->acl); |
| 743 | |
| 744 | /* free ACL extent from working block map */ |
| 745 | maplock.index = 1; |
| 746 | pxdlock = (struct pxd_lock *) & maplock; |
| 747 | pxdlock->flag = mlckFREEPXD; |
| 748 | PXDaddress(&pxdlock->pxd, xaddr); |
| 749 | PXDlength(&pxdlock->pxd, xlen); |
| 750 | txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); |
| 751 | } |
| 752 | |
| 753 | /* |
| 754 | * free xtree/data (truncate to zero length): |
| 755 | * free xtree/data pages from cache, and |
| 756 | * free xtree/data blocks from working block map; |
| 757 | */ |
| 758 | if (ip->i_size) |
Dave Kleikamp | 1868f4a | 2005-05-04 15:29:35 -0500 | [diff] [blame] | 759 | xtTruncate(0, ip, 0, COMMIT_WMAP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | } |
| 761 | |
| 762 | /* |
| 763 | * NAME: jfs_link(vp, dvp, name, crp) |
| 764 | * |
| 765 | * FUNCTION: create a link to <vp> by the name = <name> |
| 766 | * in the parent directory <dvp> |
| 767 | * |
| 768 | * PARAMETER: vp - target object |
| 769 | * dvp - parent directory of new link |
| 770 | * name - name of new link to target object |
| 771 | * crp - credential |
| 772 | * |
| 773 | * RETURN: Errors from subroutines |
| 774 | * |
| 775 | * note: |
| 776 | * JFS does NOT support link() on directories (to prevent circular |
| 777 | * path in the directory hierarchy); |
| 778 | * EPERM: the target object is a directory, and either the caller |
| 779 | * does not have appropriate privileges or the implementation prohibits |
| 780 | * using link() on directories [XPG4.2]. |
| 781 | * |
| 782 | * JFS does NOT support links between file systems: |
| 783 | * EXDEV: target object and new link are on different file systems and |
| 784 | * implementation does not support links between file systems [XPG4.2]. |
| 785 | */ |
| 786 | static int jfs_link(struct dentry *old_dentry, |
| 787 | struct inode *dir, struct dentry *dentry) |
| 788 | { |
| 789 | int rc; |
| 790 | tid_t tid; |
| 791 | struct inode *ip = old_dentry->d_inode; |
| 792 | ino_t ino; |
| 793 | struct component_name dname; |
| 794 | struct btstack btstack; |
| 795 | struct inode *iplist[2]; |
| 796 | |
| 797 | jfs_info("jfs_link: %s %s", old_dentry->d_name.name, |
| 798 | dentry->d_name.name); |
| 799 | |
| 800 | if (ip->i_nlink == JFS_LINK_MAX) |
| 801 | return -EMLINK; |
| 802 | |
| 803 | if (ip->i_nlink == 0) |
| 804 | return -ENOENT; |
| 805 | |
| 806 | tid = txBegin(ip->i_sb, 0); |
| 807 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 808 | mutex_lock(&JFS_IP(dir)->commit_mutex); |
| 809 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | |
| 811 | /* |
| 812 | * scan parent directory for entry/freespace |
| 813 | */ |
| 814 | if ((rc = get_UCSname(&dname, dentry))) |
| 815 | goto out; |
| 816 | |
| 817 | if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) |
| 818 | goto free_dname; |
| 819 | |
| 820 | /* |
| 821 | * create entry for new link in parent directory |
| 822 | */ |
| 823 | ino = ip->i_ino; |
| 824 | if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) |
| 825 | goto free_dname; |
| 826 | |
| 827 | /* update object inode */ |
| 828 | ip->i_nlink++; /* for new link */ |
| 829 | ip->i_ctime = CURRENT_TIME; |
Dave Kleikamp | 988a649 | 2005-10-31 16:53:04 -0600 | [diff] [blame] | 830 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | mark_inode_dirty(dir); |
| 832 | atomic_inc(&ip->i_count); |
| 833 | |
| 834 | iplist[0] = ip; |
| 835 | iplist[1] = dir; |
| 836 | rc = txCommit(tid, 2, &iplist[0], 0); |
| 837 | |
| 838 | if (rc) { |
| 839 | ip->i_nlink--; |
| 840 | iput(ip); |
| 841 | } else |
| 842 | d_instantiate(dentry, ip); |
| 843 | |
| 844 | free_dname: |
| 845 | free_UCSname(&dname); |
| 846 | |
| 847 | out: |
| 848 | txEnd(tid); |
| 849 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 850 | mutex_unlock(&JFS_IP(dir)->commit_mutex); |
| 851 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
| 853 | jfs_info("jfs_link: rc:%d", rc); |
| 854 | return rc; |
| 855 | } |
| 856 | |
| 857 | /* |
| 858 | * NAME: jfs_symlink(dip, dentry, name) |
| 859 | * |
| 860 | * FUNCTION: creates a symbolic link to <symlink> by name <name> |
| 861 | * in directory <dip> |
| 862 | * |
| 863 | * PARAMETER: dip - parent directory vnode |
| 864 | * dentry - dentry of symbolic link |
| 865 | * name - the path name of the existing object |
| 866 | * that will be the source of the link |
| 867 | * |
| 868 | * RETURN: errors from subroutines |
| 869 | * |
| 870 | * note: |
| 871 | * ENAMETOOLONG: pathname resolution of a symbolic link produced |
| 872 | * an intermediate result whose length exceeds PATH_MAX [XPG4.2] |
| 873 | */ |
| 874 | |
| 875 | static int jfs_symlink(struct inode *dip, struct dentry *dentry, |
| 876 | const char *name) |
| 877 | { |
| 878 | int rc; |
| 879 | tid_t tid; |
| 880 | ino_t ino = 0; |
| 881 | struct component_name dname; |
| 882 | int ssize; /* source pathname size */ |
| 883 | struct btstack btstack; |
| 884 | struct inode *ip = dentry->d_inode; |
| 885 | unchar *i_fastsymlink; |
| 886 | s64 xlen = 0; |
| 887 | int bmask = 0, xsize; |
| 888 | s64 extent = 0, xaddr; |
| 889 | struct metapage *mp; |
| 890 | struct super_block *sb; |
| 891 | struct tblock *tblk; |
| 892 | |
| 893 | struct inode *iplist[2]; |
| 894 | |
| 895 | jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name); |
| 896 | |
| 897 | ssize = strlen(name) + 1; |
| 898 | |
| 899 | /* |
| 900 | * search parent directory for entry/freespace |
| 901 | * (dtSearch() returns parent directory page pinned) |
| 902 | */ |
| 903 | |
| 904 | if ((rc = get_UCSname(&dname, dentry))) |
| 905 | goto out1; |
| 906 | |
| 907 | /* |
| 908 | * allocate on-disk/in-memory inode for symbolic link: |
| 909 | * (iAlloc() returns new, locked inode) |
| 910 | */ |
| 911 | ip = ialloc(dip, S_IFLNK | 0777); |
| 912 | if (ip == NULL) { |
| 913 | rc = -ENOSPC; |
| 914 | goto out2; |
| 915 | } |
| 916 | |
| 917 | tid = txBegin(dip->i_sb, 0); |
| 918 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 919 | mutex_lock(&JFS_IP(dip)->commit_mutex); |
| 920 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
Dave Kleikamp | 1d15b10 | 2005-09-01 09:05:39 -0500 | [diff] [blame] | 922 | rc = jfs_init_security(tid, ip, dip); |
| 923 | if (rc) |
| 924 | goto out3; |
| 925 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | tblk = tid_to_tblock(tid); |
| 927 | tblk->xflag |= COMMIT_CREATE; |
| 928 | tblk->ino = ip->i_ino; |
| 929 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; |
| 930 | |
| 931 | /* fix symlink access permission |
| 932 | * (dir_create() ANDs in the u.u_cmask, |
| 933 | * but symlinks really need to be 777 access) |
| 934 | */ |
| 935 | ip->i_mode |= 0777; |
| 936 | |
| 937 | /* |
| 938 | * write symbolic link target path name |
| 939 | */ |
| 940 | xtInitRoot(tid, ip); |
| 941 | |
| 942 | /* |
| 943 | * write source path name inline in on-disk inode (fast symbolic link) |
| 944 | */ |
| 945 | |
| 946 | if (ssize <= IDATASIZE) { |
| 947 | ip->i_op = &jfs_symlink_inode_operations; |
| 948 | |
| 949 | i_fastsymlink = JFS_IP(ip)->i_inline; |
| 950 | memcpy(i_fastsymlink, name, ssize); |
| 951 | ip->i_size = ssize - 1; |
| 952 | |
| 953 | /* |
| 954 | * if symlink is > 128 bytes, we don't have the space to |
| 955 | * store inline extended attributes |
| 956 | */ |
| 957 | if (ssize > sizeof (JFS_IP(ip)->i_inline)) |
| 958 | JFS_IP(ip)->mode2 &= ~INLINEEA; |
| 959 | |
| 960 | jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ", |
| 961 | ssize, name); |
| 962 | } |
| 963 | /* |
| 964 | * write source path name in a single extent |
| 965 | */ |
| 966 | else { |
| 967 | jfs_info("jfs_symlink: allocate extent ip:0x%p", ip); |
| 968 | |
| 969 | ip->i_op = &page_symlink_inode_operations; |
| 970 | ip->i_mapping->a_ops = &jfs_aops; |
| 971 | |
| 972 | /* |
| 973 | * even though the data of symlink object (source |
| 974 | * path name) is treated as non-journaled user data, |
| 975 | * it is read/written thru buffer cache for performance. |
| 976 | */ |
| 977 | sb = ip->i_sb; |
| 978 | bmask = JFS_SBI(sb)->bsize - 1; |
| 979 | xsize = (ssize + bmask) & ~bmask; |
| 980 | xaddr = 0; |
| 981 | xlen = xsize >> JFS_SBI(sb)->l2bsize; |
| 982 | if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0))) { |
| 983 | txAbort(tid, 0); |
| 984 | rc = -ENOSPC; |
| 985 | goto out3; |
| 986 | } |
| 987 | extent = xaddr; |
| 988 | ip->i_size = ssize - 1; |
| 989 | while (ssize) { |
| 990 | /* This is kind of silly since PATH_MAX == 4K */ |
| 991 | int copy_size = min(ssize, PSIZE); |
| 992 | |
| 993 | mp = get_metapage(ip, xaddr, PSIZE, 1); |
| 994 | |
| 995 | if (mp == NULL) { |
| 996 | xtTruncate(tid, ip, 0, COMMIT_PWMAP); |
| 997 | rc = -EIO; |
| 998 | txAbort(tid, 0); |
| 999 | goto out3; |
| 1000 | } |
| 1001 | memcpy(mp->data, name, copy_size); |
| 1002 | flush_metapage(mp); |
| 1003 | ssize -= copy_size; |
| 1004 | name += copy_size; |
| 1005 | xaddr += JFS_SBI(sb)->nbperpage; |
| 1006 | } |
| 1007 | } |
| 1008 | |
| 1009 | /* |
| 1010 | * create entry for symbolic link in parent directory |
| 1011 | */ |
| 1012 | rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE); |
| 1013 | if (rc == 0) { |
| 1014 | ino = ip->i_ino; |
| 1015 | rc = dtInsert(tid, dip, &dname, &ino, &btstack); |
| 1016 | } |
| 1017 | if (rc) { |
| 1018 | if (xlen) |
| 1019 | xtTruncate(tid, ip, 0, COMMIT_PWMAP); |
| 1020 | txAbort(tid, 0); |
| 1021 | /* discard new inode */ |
| 1022 | goto out3; |
| 1023 | } |
| 1024 | |
| 1025 | insert_inode_hash(ip); |
| 1026 | mark_inode_dirty(ip); |
| 1027 | |
Dave Kleikamp | 988a649 | 2005-10-31 16:53:04 -0600 | [diff] [blame] | 1028 | dip->i_ctime = dip->i_mtime = CURRENT_TIME; |
| 1029 | mark_inode_dirty(dip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | /* |
| 1031 | * commit update of parent directory and link object |
| 1032 | */ |
| 1033 | |
| 1034 | iplist[0] = dip; |
| 1035 | iplist[1] = ip; |
| 1036 | rc = txCommit(tid, 2, &iplist[0], 0); |
| 1037 | |
| 1038 | out3: |
| 1039 | txEnd(tid); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1040 | mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| 1041 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | if (rc) { |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 1043 | free_ea_wmap(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | ip->i_nlink = 0; |
| 1045 | iput(ip); |
| 1046 | } else |
| 1047 | d_instantiate(dentry, ip); |
| 1048 | |
| 1049 | out2: |
| 1050 | free_UCSname(&dname); |
| 1051 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | out1: |
| 1053 | jfs_info("jfs_symlink: rc:%d", rc); |
| 1054 | return rc; |
| 1055 | } |
| 1056 | |
| 1057 | |
| 1058 | /* |
| 1059 | * NAME: jfs_rename |
| 1060 | * |
| 1061 | * FUNCTION: rename a file or directory |
| 1062 | */ |
| 1063 | static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 1064 | struct inode *new_dir, struct dentry *new_dentry) |
| 1065 | { |
| 1066 | struct btstack btstack; |
| 1067 | ino_t ino; |
| 1068 | struct component_name new_dname; |
| 1069 | struct inode *new_ip; |
| 1070 | struct component_name old_dname; |
| 1071 | struct inode *old_ip; |
| 1072 | int rc; |
| 1073 | tid_t tid; |
| 1074 | struct tlock *tlck; |
| 1075 | struct dt_lock *dtlck; |
| 1076 | struct lv *lv; |
| 1077 | int ipcount; |
| 1078 | struct inode *iplist[4]; |
| 1079 | struct tblock *tblk; |
| 1080 | s64 new_size = 0; |
| 1081 | int commit_flag; |
| 1082 | |
| 1083 | |
| 1084 | jfs_info("jfs_rename: %s %s", old_dentry->d_name.name, |
| 1085 | new_dentry->d_name.name); |
| 1086 | |
| 1087 | old_ip = old_dentry->d_inode; |
| 1088 | new_ip = new_dentry->d_inode; |
| 1089 | |
| 1090 | if ((rc = get_UCSname(&old_dname, old_dentry))) |
| 1091 | goto out1; |
| 1092 | |
| 1093 | if ((rc = get_UCSname(&new_dname, new_dentry))) |
| 1094 | goto out2; |
| 1095 | |
| 1096 | /* |
| 1097 | * Make sure source inode number is what we think it is |
| 1098 | */ |
| 1099 | rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP); |
| 1100 | if (rc || (ino != old_ip->i_ino)) { |
| 1101 | rc = -ENOENT; |
| 1102 | goto out3; |
| 1103 | } |
| 1104 | |
| 1105 | /* |
| 1106 | * Make sure dest inode number (if any) is what we think it is |
| 1107 | */ |
| 1108 | rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP); |
| 1109 | if (rc == 0) { |
| 1110 | if ((new_ip == 0) || (ino != new_ip->i_ino)) { |
| 1111 | rc = -ESTALE; |
| 1112 | goto out3; |
| 1113 | } |
| 1114 | } else if (rc != -ENOENT) |
| 1115 | goto out3; |
| 1116 | else if (new_ip) { |
| 1117 | /* no entry exists, but one was expected */ |
| 1118 | rc = -ESTALE; |
| 1119 | goto out3; |
| 1120 | } |
| 1121 | |
| 1122 | if (S_ISDIR(old_ip->i_mode)) { |
| 1123 | if (new_ip) { |
| 1124 | if (!dtEmpty(new_ip)) { |
| 1125 | rc = -ENOTEMPTY; |
| 1126 | goto out3; |
| 1127 | } |
| 1128 | } else if ((new_dir != old_dir) && |
| 1129 | (new_dir->i_nlink == JFS_LINK_MAX)) { |
| 1130 | rc = -EMLINK; |
| 1131 | goto out3; |
| 1132 | } |
| 1133 | } else if (new_ip) { |
| 1134 | IWRITE_LOCK(new_ip); |
| 1135 | /* Init inode for quota operations. */ |
| 1136 | DQUOT_INIT(new_ip); |
| 1137 | } |
| 1138 | |
| 1139 | /* |
| 1140 | * The real work starts here |
| 1141 | */ |
| 1142 | tid = txBegin(new_dir->i_sb, 0); |
| 1143 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1144 | mutex_lock(&JFS_IP(new_dir)->commit_mutex); |
| 1145 | mutex_lock(&JFS_IP(old_ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | if (old_dir != new_dir) |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1147 | mutex_lock(&JFS_IP(old_dir)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
| 1149 | if (new_ip) { |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1150 | mutex_lock(&JFS_IP(new_ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | /* |
| 1152 | * Change existing directory entry to new inode number |
| 1153 | */ |
| 1154 | ino = new_ip->i_ino; |
| 1155 | rc = dtModify(tid, new_dir, &new_dname, &ino, |
| 1156 | old_ip->i_ino, JFS_RENAME); |
| 1157 | if (rc) |
| 1158 | goto out4; |
| 1159 | new_ip->i_nlink--; |
| 1160 | if (S_ISDIR(new_ip->i_mode)) { |
| 1161 | new_ip->i_nlink--; |
| 1162 | if (new_ip->i_nlink) { |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1163 | mutex_unlock(&JFS_IP(new_dir)->commit_mutex); |
| 1164 | mutex_unlock(&JFS_IP(old_ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | if (old_dir != new_dir) |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1166 | mutex_unlock(&JFS_IP(old_dir)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | if (!S_ISDIR(old_ip->i_mode) && new_ip) |
| 1168 | IWRITE_UNLOCK(new_ip); |
| 1169 | jfs_error(new_ip->i_sb, |
| 1170 | "jfs_rename: new_ip->i_nlink != 0"); |
| 1171 | return -EIO; |
| 1172 | } |
| 1173 | tblk = tid_to_tblock(tid); |
| 1174 | tblk->xflag |= COMMIT_DELETE; |
| 1175 | tblk->u.ip = new_ip; |
| 1176 | } else if (new_ip->i_nlink == 0) { |
| 1177 | assert(!test_cflag(COMMIT_Nolink, new_ip)); |
| 1178 | /* free block resources */ |
| 1179 | if ((new_size = commitZeroLink(tid, new_ip)) < 0) { |
| 1180 | txAbort(tid, 1); /* Marks FS Dirty */ |
| 1181 | rc = new_size; |
| 1182 | goto out4; |
| 1183 | } |
| 1184 | tblk = tid_to_tblock(tid); |
| 1185 | tblk->xflag |= COMMIT_DELETE; |
| 1186 | tblk->u.ip = new_ip; |
| 1187 | } else { |
| 1188 | new_ip->i_ctime = CURRENT_TIME; |
| 1189 | mark_inode_dirty(new_ip); |
| 1190 | } |
| 1191 | } else { |
| 1192 | /* |
| 1193 | * Add new directory entry |
| 1194 | */ |
| 1195 | rc = dtSearch(new_dir, &new_dname, &ino, &btstack, |
| 1196 | JFS_CREATE); |
| 1197 | if (rc) { |
| 1198 | jfs_err("jfs_rename didn't expect dtSearch to fail " |
| 1199 | "w/rc = %d", rc); |
| 1200 | goto out4; |
| 1201 | } |
| 1202 | |
| 1203 | ino = old_ip->i_ino; |
| 1204 | rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack); |
| 1205 | if (rc) { |
| 1206 | if (rc == -EIO) |
| 1207 | jfs_err("jfs_rename: dtInsert returned -EIO"); |
| 1208 | goto out4; |
| 1209 | } |
| 1210 | if (S_ISDIR(old_ip->i_mode)) |
| 1211 | new_dir->i_nlink++; |
| 1212 | } |
| 1213 | /* |
| 1214 | * Remove old directory entry |
| 1215 | */ |
| 1216 | |
| 1217 | ino = old_ip->i_ino; |
| 1218 | rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE); |
| 1219 | if (rc) { |
| 1220 | jfs_err("jfs_rename did not expect dtDelete to return rc = %d", |
| 1221 | rc); |
| 1222 | txAbort(tid, 1); /* Marks Filesystem dirty */ |
| 1223 | goto out4; |
| 1224 | } |
| 1225 | if (S_ISDIR(old_ip->i_mode)) { |
| 1226 | old_dir->i_nlink--; |
| 1227 | if (old_dir != new_dir) { |
| 1228 | /* |
| 1229 | * Change inode number of parent for moved directory |
| 1230 | */ |
| 1231 | |
| 1232 | JFS_IP(old_ip)->i_dtroot.header.idotdot = |
| 1233 | cpu_to_le32(new_dir->i_ino); |
| 1234 | |
| 1235 | /* Linelock header of dtree */ |
| 1236 | tlck = txLock(tid, old_ip, |
| 1237 | (struct metapage *) &JFS_IP(old_ip)->bxflag, |
| 1238 | tlckDTREE | tlckBTROOT | tlckRELINK); |
| 1239 | dtlck = (struct dt_lock *) & tlck->lock; |
| 1240 | ASSERT(dtlck->index == 0); |
| 1241 | lv = & dtlck->lv[0]; |
| 1242 | lv->offset = 0; |
| 1243 | lv->length = 1; |
| 1244 | dtlck->index++; |
| 1245 | } |
| 1246 | } |
| 1247 | |
| 1248 | /* |
| 1249 | * Update ctime on changed/moved inodes & mark dirty |
| 1250 | */ |
| 1251 | old_ip->i_ctime = CURRENT_TIME; |
| 1252 | mark_inode_dirty(old_ip); |
| 1253 | |
| 1254 | new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb); |
| 1255 | mark_inode_dirty(new_dir); |
| 1256 | |
| 1257 | /* Build list of inodes modified by this transaction */ |
| 1258 | ipcount = 0; |
| 1259 | iplist[ipcount++] = old_ip; |
| 1260 | if (new_ip) |
| 1261 | iplist[ipcount++] = new_ip; |
| 1262 | iplist[ipcount++] = old_dir; |
| 1263 | |
| 1264 | if (old_dir != new_dir) { |
| 1265 | iplist[ipcount++] = new_dir; |
| 1266 | old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; |
| 1267 | mark_inode_dirty(old_dir); |
| 1268 | } |
| 1269 | |
| 1270 | /* |
| 1271 | * Incomplete truncate of file data can |
| 1272 | * result in timing problems unless we synchronously commit the |
| 1273 | * transaction. |
| 1274 | */ |
| 1275 | if (new_size) |
| 1276 | commit_flag = COMMIT_SYNC; |
| 1277 | else |
| 1278 | commit_flag = 0; |
| 1279 | |
| 1280 | rc = txCommit(tid, ipcount, iplist, commit_flag); |
| 1281 | |
| 1282 | out4: |
| 1283 | txEnd(tid); |
| 1284 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1285 | mutex_unlock(&JFS_IP(new_dir)->commit_mutex); |
| 1286 | mutex_unlock(&JFS_IP(old_ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | if (old_dir != new_dir) |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1288 | mutex_unlock(&JFS_IP(old_dir)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | if (new_ip) |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1290 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | |
| 1292 | while (new_size && (rc == 0)) { |
| 1293 | tid = txBegin(new_ip->i_sb, 0); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1294 | mutex_lock(&JFS_IP(new_ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | new_size = xtTruncate_pmap(tid, new_ip, new_size); |
| 1296 | if (new_size < 0) { |
| 1297 | txAbort(tid, 1); |
| 1298 | rc = new_size; |
| 1299 | } else |
| 1300 | rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC); |
| 1301 | txEnd(tid); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1302 | mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | } |
| 1304 | if (new_ip && (new_ip->i_nlink == 0)) |
| 1305 | set_cflag(COMMIT_Nolink, new_ip); |
| 1306 | out3: |
| 1307 | free_UCSname(&new_dname); |
| 1308 | out2: |
| 1309 | free_UCSname(&old_dname); |
| 1310 | out1: |
| 1311 | if (new_ip && !S_ISDIR(new_ip->i_mode)) |
| 1312 | IWRITE_UNLOCK(new_ip); |
| 1313 | /* |
| 1314 | * Truncating the directory index table is not guaranteed. It |
| 1315 | * may need to be done iteratively |
| 1316 | */ |
| 1317 | if (test_cflag(COMMIT_Stale, old_dir)) { |
| 1318 | if (old_dir->i_size > 1) |
| 1319 | jfs_truncate_nolock(old_dir, 0); |
| 1320 | |
| 1321 | clear_cflag(COMMIT_Stale, old_dir); |
| 1322 | } |
| 1323 | |
| 1324 | jfs_info("jfs_rename: returning %d", rc); |
| 1325 | return rc; |
| 1326 | } |
| 1327 | |
| 1328 | |
| 1329 | /* |
| 1330 | * NAME: jfs_mknod |
| 1331 | * |
| 1332 | * FUNCTION: Create a special file (device) |
| 1333 | */ |
| 1334 | static int jfs_mknod(struct inode *dir, struct dentry *dentry, |
| 1335 | int mode, dev_t rdev) |
| 1336 | { |
| 1337 | struct jfs_inode_info *jfs_ip; |
| 1338 | struct btstack btstack; |
| 1339 | struct component_name dname; |
| 1340 | ino_t ino; |
| 1341 | struct inode *ip; |
| 1342 | struct inode *iplist[2]; |
| 1343 | int rc; |
| 1344 | tid_t tid; |
| 1345 | struct tblock *tblk; |
| 1346 | |
| 1347 | if (!new_valid_dev(rdev)) |
| 1348 | return -EINVAL; |
| 1349 | |
| 1350 | jfs_info("jfs_mknod: %s", dentry->d_name.name); |
| 1351 | |
| 1352 | if ((rc = get_UCSname(&dname, dentry))) |
| 1353 | goto out; |
| 1354 | |
| 1355 | ip = ialloc(dir, mode); |
| 1356 | if (ip == NULL) { |
| 1357 | rc = -ENOSPC; |
| 1358 | goto out1; |
| 1359 | } |
| 1360 | jfs_ip = JFS_IP(ip); |
| 1361 | |
| 1362 | tid = txBegin(dir->i_sb, 0); |
| 1363 | |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1364 | mutex_lock(&JFS_IP(dir)->commit_mutex); |
| 1365 | mutex_lock(&JFS_IP(ip)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 1367 | rc = jfs_init_acl(tid, ip, dir); |
| 1368 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | goto out3; |
| 1370 | |
Dave Kleikamp | 1d15b10 | 2005-09-01 09:05:39 -0500 | [diff] [blame] | 1371 | rc = jfs_init_security(tid, ip, dir); |
| 1372 | if (rc) { |
| 1373 | txAbort(tid, 0); |
| 1374 | goto out3; |
| 1375 | } |
| 1376 | |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 1377 | if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) { |
| 1378 | txAbort(tid, 0); |
| 1379 | goto out3; |
| 1380 | } |
| 1381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | tblk = tid_to_tblock(tid); |
| 1383 | tblk->xflag |= COMMIT_CREATE; |
| 1384 | tblk->ino = ip->i_ino; |
| 1385 | tblk->u.ixpxd = JFS_IP(ip)->ixpxd; |
| 1386 | |
| 1387 | ino = ip->i_ino; |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 1388 | if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) { |
| 1389 | txAbort(tid, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | goto out3; |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 1391 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | |
| 1393 | ip->i_op = &jfs_file_inode_operations; |
| 1394 | jfs_ip->dev = new_encode_dev(rdev); |
| 1395 | init_special_inode(ip, ip->i_mode, rdev); |
| 1396 | |
| 1397 | insert_inode_hash(ip); |
| 1398 | mark_inode_dirty(ip); |
| 1399 | |
| 1400 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
| 1401 | |
| 1402 | mark_inode_dirty(dir); |
| 1403 | |
| 1404 | iplist[0] = dir; |
| 1405 | iplist[1] = ip; |
| 1406 | rc = txCommit(tid, 2, iplist, 0); |
| 1407 | |
| 1408 | out3: |
| 1409 | txEnd(tid); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 1410 | mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| 1411 | mutex_unlock(&JFS_IP(dir)->commit_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | if (rc) { |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 1413 | free_ea_wmap(ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | ip->i_nlink = 0; |
| 1415 | iput(ip); |
| 1416 | } else |
| 1417 | d_instantiate(dentry, ip); |
| 1418 | |
| 1419 | out1: |
| 1420 | free_UCSname(&dname); |
| 1421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | out: |
| 1423 | jfs_info("jfs_mknod: returning %d", rc); |
| 1424 | return rc; |
| 1425 | } |
| 1426 | |
| 1427 | static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd) |
| 1428 | { |
| 1429 | struct btstack btstack; |
| 1430 | ino_t inum; |
| 1431 | struct inode *ip; |
| 1432 | struct component_name key; |
| 1433 | const char *name = dentry->d_name.name; |
| 1434 | int len = dentry->d_name.len; |
| 1435 | int rc; |
| 1436 | |
| 1437 | jfs_info("jfs_lookup: name = %s", name); |
| 1438 | |
Dave Kleikamp | 686762c | 2005-08-17 13:53:13 -0500 | [diff] [blame] | 1439 | if (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2) |
| 1440 | dentry->d_op = &jfs_ci_dentry_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | |
| 1442 | if ((name[0] == '.') && (len == 1)) |
| 1443 | inum = dip->i_ino; |
| 1444 | else if (strcmp(name, "..") == 0) |
| 1445 | inum = PARENT(dip); |
| 1446 | else { |
| 1447 | if ((rc = get_UCSname(&key, dentry))) |
| 1448 | return ERR_PTR(rc); |
| 1449 | rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP); |
| 1450 | free_UCSname(&key); |
| 1451 | if (rc == -ENOENT) { |
| 1452 | d_add(dentry, NULL); |
| 1453 | return ERR_PTR(0); |
| 1454 | } else if (rc) { |
| 1455 | jfs_err("jfs_lookup: dtSearch returned %d", rc); |
| 1456 | return ERR_PTR(rc); |
| 1457 | } |
| 1458 | } |
| 1459 | |
| 1460 | ip = iget(dip->i_sb, inum); |
| 1461 | if (ip == NULL || is_bad_inode(ip)) { |
| 1462 | jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum); |
| 1463 | if (ip) |
| 1464 | iput(ip); |
| 1465 | return ERR_PTR(-EACCES); |
| 1466 | } |
| 1467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | dentry = d_splice_alias(ip, dentry); |
| 1469 | |
| 1470 | if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2)) |
| 1471 | dentry->d_op = &jfs_ci_dentry_operations; |
| 1472 | |
| 1473 | return dentry; |
| 1474 | } |
| 1475 | |
| 1476 | struct dentry *jfs_get_parent(struct dentry *dentry) |
| 1477 | { |
| 1478 | struct super_block *sb = dentry->d_inode->i_sb; |
| 1479 | struct dentry *parent = ERR_PTR(-ENOENT); |
| 1480 | struct inode *inode; |
| 1481 | unsigned long parent_ino; |
| 1482 | |
| 1483 | parent_ino = |
| 1484 | le32_to_cpu(JFS_IP(dentry->d_inode)->i_dtroot.header.idotdot); |
| 1485 | inode = iget(sb, parent_ino); |
| 1486 | if (inode) { |
| 1487 | if (is_bad_inode(inode)) { |
| 1488 | iput(inode); |
| 1489 | parent = ERR_PTR(-EACCES); |
| 1490 | } else { |
| 1491 | parent = d_alloc_anon(inode); |
| 1492 | if (!parent) { |
| 1493 | parent = ERR_PTR(-ENOMEM); |
| 1494 | iput(inode); |
| 1495 | } |
| 1496 | } |
| 1497 | } |
| 1498 | |
| 1499 | return parent; |
| 1500 | } |
| 1501 | |
| 1502 | struct inode_operations jfs_dir_inode_operations = { |
| 1503 | .create = jfs_create, |
| 1504 | .lookup = jfs_lookup, |
| 1505 | .link = jfs_link, |
| 1506 | .unlink = jfs_unlink, |
| 1507 | .symlink = jfs_symlink, |
| 1508 | .mkdir = jfs_mkdir, |
| 1509 | .rmdir = jfs_rmdir, |
| 1510 | .mknod = jfs_mknod, |
| 1511 | .rename = jfs_rename, |
| 1512 | .setxattr = jfs_setxattr, |
| 1513 | .getxattr = jfs_getxattr, |
| 1514 | .listxattr = jfs_listxattr, |
| 1515 | .removexattr = jfs_removexattr, |
| 1516 | #ifdef CONFIG_JFS_POSIX_ACL |
| 1517 | .setattr = jfs_setattr, |
| 1518 | .permission = jfs_permission, |
| 1519 | #endif |
| 1520 | }; |
| 1521 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 1522 | const struct file_operations jfs_dir_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | .read = generic_read_dir, |
| 1524 | .readdir = jfs_readdir, |
| 1525 | .fsync = jfs_fsync, |
Herbert Poetzl | fa3241d | 2006-02-09 09:09:16 -0600 | [diff] [blame] | 1526 | .ioctl = jfs_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | }; |
| 1528 | |
| 1529 | static int jfs_ci_hash(struct dentry *dir, struct qstr *this) |
| 1530 | { |
| 1531 | unsigned long hash; |
| 1532 | int i; |
| 1533 | |
| 1534 | hash = init_name_hash(); |
| 1535 | for (i=0; i < this->len; i++) |
| 1536 | hash = partial_name_hash(tolower(this->name[i]), hash); |
| 1537 | this->hash = end_name_hash(hash); |
| 1538 | |
| 1539 | return 0; |
| 1540 | } |
| 1541 | |
| 1542 | static int jfs_ci_compare(struct dentry *dir, struct qstr *a, struct qstr *b) |
| 1543 | { |
| 1544 | int i, result = 1; |
| 1545 | |
| 1546 | if (a->len != b->len) |
| 1547 | goto out; |
| 1548 | for (i=0; i < a->len; i++) { |
| 1549 | if (tolower(a->name[i]) != tolower(b->name[i])) |
| 1550 | goto out; |
| 1551 | } |
| 1552 | result = 0; |
| 1553 | |
| 1554 | /* |
| 1555 | * We want creates to preserve case. A negative dentry, a, that |
| 1556 | * has a different case than b may cause a new entry to be created |
| 1557 | * with the wrong case. Since we can't tell if a comes from a negative |
| 1558 | * dentry, we blindly replace it with b. This should be harmless if |
| 1559 | * a is not a negative dentry. |
| 1560 | */ |
| 1561 | memcpy((unsigned char *)a->name, b->name, a->len); |
| 1562 | out: |
| 1563 | return result; |
| 1564 | } |
| 1565 | |
| 1566 | struct dentry_operations jfs_ci_dentry_operations = |
| 1567 | { |
| 1568 | .d_hash = jfs_ci_hash, |
| 1569 | .d_compare = jfs_ci_compare, |
| 1570 | }; |