Commit | Line | Data |
---|---|---|
19de7351 DC |
1 | /* |
2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. | |
3 | * Copyright (c) 2012-2013 Red Hat, Inc. | |
4 | * All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it would be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * 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 the Free Software Foundation, | |
17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
19 | #include "xfs.h" | |
239880ef | 20 | #include "xfs_shared.h" |
19de7351 | 21 | #include "xfs_fs.h" |
6ca1c906 | 22 | #include "xfs_format.h" |
239880ef DC |
23 | #include "xfs_log_format.h" |
24 | #include "xfs_trans_resv.h" | |
19de7351 | 25 | #include "xfs_bit.h" |
19de7351 | 26 | #include "xfs_mount.h" |
57062787 | 27 | #include "xfs_da_format.h" |
d6cf1305 | 28 | #include "xfs_da_btree.h" |
3ab78df2 | 29 | #include "xfs_defer.h" |
2b9ab5ab | 30 | #include "xfs_dir2.h" |
19de7351 | 31 | #include "xfs_inode.h" |
19de7351 DC |
32 | #include "xfs_ialloc.h" |
33 | #include "xfs_alloc.h" | |
34 | #include "xfs_bmap.h" | |
a4fbe6ab | 35 | #include "xfs_bmap_btree.h" |
68988114 | 36 | #include "xfs_bmap_util.h" |
19de7351 DC |
37 | #include "xfs_error.h" |
38 | #include "xfs_quota.h" | |
19de7351 | 39 | #include "xfs_trans_space.h" |
19de7351 DC |
40 | #include "xfs_trace.h" |
41 | #include "xfs_symlink.h" | |
239880ef | 42 | #include "xfs_trans.h" |
239880ef | 43 | #include "xfs_log.h" |
19de7351 DC |
44 | |
45 | /* ----- Kernel only functions below ----- */ | |
5da8f2f8 DW |
46 | int |
47 | xfs_readlink_bmap_ilocked( | |
f948dd76 DC |
48 | struct xfs_inode *ip, |
49 | char *link) | |
19de7351 | 50 | { |
f948dd76 DC |
51 | struct xfs_mount *mp = ip->i_mount; |
52 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; | |
53 | struct xfs_buf *bp; | |
54 | xfs_daddr_t d; | |
55 | char *cur_chunk; | |
56 | int pathlen = ip->i_d.di_size; | |
57 | int nmaps = XFS_SYMLINK_MAPS; | |
58 | int byte_cnt; | |
59 | int n; | |
60 | int error = 0; | |
61 | int fsblocks = 0; | |
62 | int offset; | |
19de7351 | 63 | |
29db2500 CH |
64 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); |
65 | ||
f948dd76 DC |
66 | fsblocks = xfs_symlink_blocks(mp, pathlen); |
67 | error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0); | |
19de7351 DC |
68 | if (error) |
69 | goto out; | |
70 | ||
f948dd76 | 71 | offset = 0; |
19de7351 DC |
72 | for (n = 0; n < nmaps; n++) { |
73 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
74 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
75 | ||
f948dd76 DC |
76 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, |
77 | &xfs_symlink_buf_ops); | |
19de7351 | 78 | if (!bp) |
2451337d | 79 | return -ENOMEM; |
19de7351 DC |
80 | error = bp->b_error; |
81 | if (error) { | |
82 | xfs_buf_ioerror_alert(bp, __func__); | |
83 | xfs_buf_relse(bp); | |
ac75a1f7 DC |
84 | |
85 | /* bad CRC means corrupted metadata */ | |
2451337d DC |
86 | if (error == -EFSBADCRC) |
87 | error = -EFSCORRUPTED; | |
19de7351 DC |
88 | goto out; |
89 | } | |
f948dd76 | 90 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); |
19de7351 DC |
91 | if (pathlen < byte_cnt) |
92 | byte_cnt = pathlen; | |
f948dd76 DC |
93 | |
94 | cur_chunk = bp->b_addr; | |
95 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
bda65ef8 | 96 | if (!xfs_symlink_hdr_ok(ip->i_ino, offset, |
f948dd76 | 97 | byte_cnt, bp)) { |
2451337d | 98 | error = -EFSCORRUPTED; |
f948dd76 DC |
99 | xfs_alert(mp, |
100 | "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)", | |
101 | offset, byte_cnt, ip->i_ino); | |
102 | xfs_buf_relse(bp); | |
103 | goto out; | |
104 | ||
105 | } | |
106 | ||
107 | cur_chunk += sizeof(struct xfs_dsymlink_hdr); | |
108 | } | |
109 | ||
2ac56d3d | 110 | memcpy(link + offset, cur_chunk, byte_cnt); |
f948dd76 | 111 | |
19de7351 | 112 | pathlen -= byte_cnt; |
f948dd76 | 113 | offset += byte_cnt; |
19de7351 | 114 | |
19de7351 DC |
115 | xfs_buf_relse(bp); |
116 | } | |
f948dd76 | 117 | ASSERT(pathlen == 0); |
19de7351 DC |
118 | |
119 | link[ip->i_d.di_size] = '\0'; | |
120 | error = 0; | |
121 | ||
122 | out: | |
123 | return error; | |
124 | } | |
125 | ||
126 | int | |
127 | xfs_readlink( | |
f948dd76 | 128 | struct xfs_inode *ip, |
19de7351 DC |
129 | char *link) |
130 | { | |
f948dd76 | 131 | struct xfs_mount *mp = ip->i_mount; |
19de7351 DC |
132 | xfs_fsize_t pathlen; |
133 | int error = 0; | |
134 | ||
135 | trace_xfs_readlink(ip); | |
136 | ||
30ee052e CH |
137 | ASSERT(!(ip->i_df.if_flags & XFS_IFINLINE)); |
138 | ||
19de7351 | 139 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 140 | return -EIO; |
19de7351 DC |
141 | |
142 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
143 | ||
144 | pathlen = ip->i_d.di_size; | |
145 | if (!pathlen) | |
146 | goto out; | |
147 | ||
6eb0b8df | 148 | if (pathlen < 0 || pathlen > XFS_SYMLINK_MAXLEN) { |
19de7351 DC |
149 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", |
150 | __func__, (unsigned long long) ip->i_ino, | |
151 | (long long) pathlen); | |
152 | ASSERT(0); | |
2451337d | 153 | error = -EFSCORRUPTED; |
19de7351 DC |
154 | goto out; |
155 | } | |
156 | ||
157 | ||
5da8f2f8 | 158 | error = xfs_readlink_bmap_ilocked(ip, link); |
19de7351 DC |
159 | |
160 | out: | |
161 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
162 | return error; | |
163 | } | |
164 | ||
165 | int | |
166 | xfs_symlink( | |
f948dd76 | 167 | struct xfs_inode *dp, |
19de7351 DC |
168 | struct xfs_name *link_name, |
169 | const char *target_path, | |
170 | umode_t mode, | |
f948dd76 | 171 | struct xfs_inode **ipp) |
19de7351 | 172 | { |
f948dd76 DC |
173 | struct xfs_mount *mp = dp->i_mount; |
174 | struct xfs_trans *tp = NULL; | |
175 | struct xfs_inode *ip = NULL; | |
176 | int error = 0; | |
19de7351 | 177 | int pathlen; |
2c3234d1 | 178 | struct xfs_defer_ops dfops; |
19de7351 | 179 | xfs_fsblock_t first_block; |
58c90473 | 180 | bool unlock_dp_on_error = false; |
19de7351 DC |
181 | xfs_fileoff_t first_fsb; |
182 | xfs_filblks_t fs_blocks; | |
183 | int nmaps; | |
f948dd76 | 184 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; |
19de7351 DC |
185 | xfs_daddr_t d; |
186 | const char *cur_chunk; | |
187 | int byte_cnt; | |
188 | int n; | |
189 | xfs_buf_t *bp; | |
190 | prid_t prid; | |
113a5683 CS |
191 | struct xfs_dquot *udqp = NULL; |
192 | struct xfs_dquot *gdqp = NULL; | |
92f8ff73 | 193 | struct xfs_dquot *pdqp = NULL; |
19de7351 DC |
194 | uint resblks; |
195 | ||
196 | *ipp = NULL; | |
19de7351 DC |
197 | |
198 | trace_xfs_symlink(dp, link_name); | |
199 | ||
200 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 201 | return -EIO; |
19de7351 DC |
202 | |
203 | /* | |
204 | * Check component lengths of the target path name. | |
205 | */ | |
206 | pathlen = strlen(target_path); | |
6eb0b8df | 207 | if (pathlen >= XFS_SYMLINK_MAXLEN) /* total string too long */ |
2451337d | 208 | return -ENAMETOOLONG; |
19de7351 DC |
209 | |
210 | udqp = gdqp = NULL; | |
163467d3 | 211 | prid = xfs_get_initial_prid(dp); |
19de7351 DC |
212 | |
213 | /* | |
214 | * Make sure that we have allocated dquot(s) on disk. | |
215 | */ | |
7aab1b28 DE |
216 | error = xfs_qm_vop_dqalloc(dp, |
217 | xfs_kuid_to_uid(current_fsuid()), | |
218 | xfs_kgid_to_gid(current_fsgid()), prid, | |
219 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, | |
220 | &udqp, &gdqp, &pdqp); | |
19de7351 | 221 | if (error) |
58c90473 | 222 | return error; |
19de7351 | 223 | |
19de7351 DC |
224 | /* |
225 | * The symlink will fit into the inode data fork? | |
226 | * There can't be any attributes so we get the whole variable part. | |
227 | */ | |
228 | if (pathlen <= XFS_LITINO(mp, dp->i_d.di_version)) | |
229 | fs_blocks = 0; | |
230 | else | |
321a9583 | 231 | fs_blocks = xfs_symlink_blocks(mp, pathlen); |
19de7351 | 232 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
253f4911 CH |
233 | |
234 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_symlink, resblks, 0, 0, &tp); | |
2451337d | 235 | if (error == -ENOSPC && fs_blocks == 0) { |
19de7351 | 236 | resblks = 0; |
253f4911 CH |
237 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_symlink, 0, 0, 0, |
238 | &tp); | |
19de7351 | 239 | } |
4906e215 | 240 | if (error) |
253f4911 | 241 | goto out_release_inode; |
19de7351 | 242 | |
65523218 | 243 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
19de7351 DC |
244 | unlock_dp_on_error = true; |
245 | ||
246 | /* | |
247 | * Check whether the directory allows new symlinks or not. | |
248 | */ | |
249 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
2451337d | 250 | error = -EPERM; |
58c90473 | 251 | goto out_trans_cancel; |
19de7351 DC |
252 | } |
253 | ||
254 | /* | |
255 | * Reserve disk quota : blocks and inode. | |
256 | */ | |
92f8ff73 CS |
257 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, |
258 | pdqp, resblks, 1, 0); | |
19de7351 | 259 | if (error) |
58c90473 | 260 | goto out_trans_cancel; |
19de7351 DC |
261 | |
262 | /* | |
263 | * Check for ability to enter directory entry, if no space reserved. | |
264 | */ | |
94f3cad5 ES |
265 | if (!resblks) { |
266 | error = xfs_dir_canenter(tp, dp, link_name); | |
267 | if (error) | |
58c90473 | 268 | goto out_trans_cancel; |
94f3cad5 | 269 | } |
19de7351 DC |
270 | /* |
271 | * Initialize the bmap freelist prior to calling either | |
272 | * bmapi or the directory create code. | |
273 | */ | |
2c3234d1 | 274 | xfs_defer_init(&dfops, &first_block); |
19de7351 DC |
275 | |
276 | /* | |
277 | * Allocate an inode for the symlink. | |
278 | */ | |
279 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, | |
280 | prid, resblks > 0, &ip, NULL); | |
58c90473 DC |
281 | if (error) |
282 | goto out_trans_cancel; | |
19de7351 DC |
283 | |
284 | /* | |
58c90473 DC |
285 | * Now we join the directory inode to the transaction. We do not do it |
286 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
287 | * (and release all the locks). An error from here on will result in | |
288 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
19de7351 DC |
289 | * error path. |
290 | */ | |
65523218 | 291 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
19de7351 DC |
292 | unlock_dp_on_error = false; |
293 | ||
294 | /* | |
295 | * Also attach the dquot(s) to it, if applicable. | |
296 | */ | |
92f8ff73 | 297 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); |
19de7351 DC |
298 | |
299 | if (resblks) | |
300 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
301 | /* | |
302 | * If the symlink will fit into the inode, write it inline. | |
303 | */ | |
304 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
143f4aed | 305 | xfs_init_local_fork(ip, XFS_DATA_FORK, target_path, pathlen); |
19de7351 | 306 | |
143f4aed | 307 | ip->i_d.di_size = pathlen; |
19de7351 DC |
308 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; |
309 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
19de7351 | 310 | } else { |
f948dd76 DC |
311 | int offset; |
312 | ||
19de7351 DC |
313 | first_fsb = 0; |
314 | nmaps = XFS_SYMLINK_MAPS; | |
315 | ||
316 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, | |
317 | XFS_BMAPI_METADATA, &first_block, resblks, | |
2c3234d1 | 318 | mval, &nmaps, &dfops); |
19de7351 | 319 | if (error) |
58c90473 | 320 | goto out_bmap_cancel; |
19de7351 DC |
321 | |
322 | if (resblks) | |
323 | resblks -= fs_blocks; | |
324 | ip->i_d.di_size = pathlen; | |
325 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
326 | ||
327 | cur_chunk = target_path; | |
f948dd76 | 328 | offset = 0; |
19de7351 | 329 | for (n = 0; n < nmaps; n++) { |
321a9583 | 330 | char *buf; |
f948dd76 | 331 | |
19de7351 DC |
332 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
333 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
334 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
335 | BTOBB(byte_cnt), 0); | |
336 | if (!bp) { | |
2451337d | 337 | error = -ENOMEM; |
58c90473 | 338 | goto out_bmap_cancel; |
19de7351 | 339 | } |
f948dd76 DC |
340 | bp->b_ops = &xfs_symlink_buf_ops; |
341 | ||
342 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); | |
321a9583 | 343 | byte_cnt = min(byte_cnt, pathlen); |
19de7351 | 344 | |
f948dd76 DC |
345 | buf = bp->b_addr; |
346 | buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, | |
347 | byte_cnt, bp); | |
348 | ||
349 | memcpy(buf, cur_chunk, byte_cnt); | |
350 | ||
19de7351 | 351 | cur_chunk += byte_cnt; |
f948dd76 DC |
352 | pathlen -= byte_cnt; |
353 | offset += byte_cnt; | |
19de7351 | 354 | |
daf7b799 | 355 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF); |
f948dd76 DC |
356 | xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - |
357 | (char *)bp->b_addr); | |
19de7351 | 358 | } |
321a9583 | 359 | ASSERT(pathlen == 0); |
19de7351 DC |
360 | } |
361 | ||
362 | /* | |
363 | * Create the directory entry for the symlink. | |
364 | */ | |
365 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, | |
2c3234d1 | 366 | &first_block, &dfops, resblks); |
19de7351 | 367 | if (error) |
58c90473 | 368 | goto out_bmap_cancel; |
19de7351 DC |
369 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
370 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
371 | ||
372 | /* | |
373 | * If this is a synchronous mount, make sure that the | |
374 | * symlink transaction goes to disk before returning to | |
375 | * the user. | |
376 | */ | |
377 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
378 | xfs_trans_set_sync(tp); | |
379 | } | |
380 | ||
8ad7c629 | 381 | error = xfs_defer_finish(&tp, &dfops); |
58c90473 DC |
382 | if (error) |
383 | goto out_bmap_cancel; | |
384 | ||
70393313 | 385 | error = xfs_trans_commit(tp); |
58c90473 DC |
386 | if (error) |
387 | goto out_release_inode; | |
388 | ||
19de7351 DC |
389 | xfs_qm_dqrele(udqp); |
390 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 391 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
392 | |
393 | *ipp = ip; | |
394 | return 0; | |
395 | ||
58c90473 | 396 | out_bmap_cancel: |
2c3234d1 | 397 | xfs_defer_cancel(&dfops); |
58c90473 | 398 | out_trans_cancel: |
4906e215 | 399 | xfs_trans_cancel(tp); |
58c90473 DC |
400 | out_release_inode: |
401 | /* | |
402 | * Wait until after the current transaction is aborted to finish the | |
403 | * setup of the inode and release the inode. This prevents recursive | |
404 | * transactions and deadlocks from xfs_inactive. | |
405 | */ | |
406 | if (ip) { | |
407 | xfs_finish_inode_setup(ip); | |
408 | IRELE(ip); | |
409 | } | |
410 | ||
19de7351 DC |
411 | xfs_qm_dqrele(udqp); |
412 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 413 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
414 | |
415 | if (unlock_dp_on_error) | |
65523218 | 416 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
19de7351 DC |
417 | return error; |
418 | } | |
419 | ||
420 | /* | |
421 | * Free a symlink that has blocks associated with it. | |
422 | */ | |
725eb1eb | 423 | STATIC int |
19de7351 | 424 | xfs_inactive_symlink_rmt( |
36b21dde | 425 | struct xfs_inode *ip) |
19de7351 DC |
426 | { |
427 | xfs_buf_t *bp; | |
19de7351 DC |
428 | int done; |
429 | int error; | |
430 | xfs_fsblock_t first_block; | |
2c3234d1 | 431 | struct xfs_defer_ops dfops; |
19de7351 DC |
432 | int i; |
433 | xfs_mount_t *mp; | |
434 | xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; | |
435 | int nmaps; | |
19de7351 DC |
436 | int size; |
437 | xfs_trans_t *tp; | |
438 | ||
19de7351 | 439 | mp = ip->i_mount; |
725eb1eb | 440 | ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS); |
19de7351 DC |
441 | /* |
442 | * We're freeing a symlink that has some | |
443 | * blocks allocated to it. Free the | |
444 | * blocks here. We know that we've got | |
445 | * either 1 or 2 extents and that we can | |
446 | * free them all in one bunmapi call. | |
447 | */ | |
448 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
449 | ||
253f4911 CH |
450 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
451 | if (error) | |
36b21dde | 452 | return error; |
36b21dde BF |
453 | |
454 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
455 | xfs_trans_ijoin(tp, ip, 0); | |
456 | ||
19de7351 DC |
457 | /* |
458 | * Lock the inode, fix the size, and join it to the transaction. | |
459 | * Hold it so in the normal path, we still have it locked for | |
460 | * the second transaction. In the error paths we need it | |
461 | * held so the cancel won't rele it, see below. | |
462 | */ | |
463 | size = (int)ip->i_d.di_size; | |
464 | ip->i_d.di_size = 0; | |
465 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
466 | /* | |
467 | * Find the block(s) so we can inval and unmap them. | |
468 | */ | |
469 | done = 0; | |
2c3234d1 | 470 | xfs_defer_init(&dfops, &first_block); |
19de7351 | 471 | nmaps = ARRAY_SIZE(mval); |
f948dd76 | 472 | error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), |
19de7351 DC |
473 | mval, &nmaps, 0); |
474 | if (error) | |
36b21dde | 475 | goto error_trans_cancel; |
19de7351 | 476 | /* |
f948dd76 | 477 | * Invalidate the block(s). No validation is done. |
19de7351 DC |
478 | */ |
479 | for (i = 0; i < nmaps; i++) { | |
480 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
481 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
482 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
483 | if (!bp) { | |
2451337d | 484 | error = -ENOMEM; |
36b21dde | 485 | goto error_bmap_cancel; |
19de7351 DC |
486 | } |
487 | xfs_trans_binval(tp, bp); | |
488 | } | |
489 | /* | |
2c3234d1 | 490 | * Unmap the dead block(s) to the dfops. |
19de7351 | 491 | */ |
ab7bb610 | 492 | error = xfs_bunmapi(tp, ip, 0, size, 0, nmaps, |
2c3234d1 | 493 | &first_block, &dfops, &done); |
36b21dde BF |
494 | if (error) |
495 | goto error_bmap_cancel; | |
19de7351 DC |
496 | ASSERT(done); |
497 | /* | |
498 | * Commit the first transaction. This logs the EFI and the inode. | |
499 | */ | |
8ad7c629 CH |
500 | xfs_defer_ijoin(&dfops, ip); |
501 | error = xfs_defer_finish(&tp, &dfops); | |
36b21dde BF |
502 | if (error) |
503 | goto error_bmap_cancel; | |
19de7351 DC |
504 | /* |
505 | * The first xact was committed, so add the inode to the new one. | |
506 | * Mark it dirty so it will be logged and moved forward in the log as | |
507 | * part of every commit. | |
508 | */ | |
509 | xfs_trans_ijoin(tp, ip, 0); | |
510 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
19de7351 DC |
511 | /* |
512 | * Commit the transaction containing extent freeing and EFDs. | |
19de7351 | 513 | */ |
70393313 | 514 | error = xfs_trans_commit(tp); |
19de7351 DC |
515 | if (error) { |
516 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
36b21dde | 517 | goto error_unlock; |
19de7351 | 518 | } |
19de7351 DC |
519 | |
520 | /* | |
521 | * Remove the memory for extent descriptions (just bookkeeping). | |
522 | */ | |
523 | if (ip->i_df.if_bytes) | |
524 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
525 | ASSERT(ip->i_df.if_bytes == 0); | |
19de7351 | 526 | |
36b21dde | 527 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
19de7351 DC |
528 | return 0; |
529 | ||
36b21dde | 530 | error_bmap_cancel: |
2c3234d1 | 531 | xfs_defer_cancel(&dfops); |
36b21dde | 532 | error_trans_cancel: |
4906e215 | 533 | xfs_trans_cancel(tp); |
36b21dde BF |
534 | error_unlock: |
535 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
19de7351 DC |
536 | return error; |
537 | } | |
725eb1eb MT |
538 | |
539 | /* | |
540 | * xfs_inactive_symlink - free a symlink | |
541 | */ | |
542 | int | |
543 | xfs_inactive_symlink( | |
36b21dde | 544 | struct xfs_inode *ip) |
725eb1eb MT |
545 | { |
546 | struct xfs_mount *mp = ip->i_mount; | |
547 | int pathlen; | |
548 | ||
549 | trace_xfs_inactive_symlink(ip); | |
550 | ||
725eb1eb | 551 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 552 | return -EIO; |
725eb1eb | 553 | |
36b21dde BF |
554 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
555 | ||
725eb1eb MT |
556 | /* |
557 | * Zero length symlinks _can_ exist. | |
558 | */ | |
559 | pathlen = (int)ip->i_d.di_size; | |
36b21dde BF |
560 | if (!pathlen) { |
561 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
725eb1eb | 562 | return 0; |
36b21dde | 563 | } |
725eb1eb | 564 | |
6eb0b8df | 565 | if (pathlen < 0 || pathlen > XFS_SYMLINK_MAXLEN) { |
725eb1eb MT |
566 | xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", |
567 | __func__, (unsigned long long)ip->i_ino, pathlen); | |
36b21dde | 568 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb | 569 | ASSERT(0); |
2451337d | 570 | return -EFSCORRUPTED; |
725eb1eb MT |
571 | } |
572 | ||
573 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
36b21dde | 574 | if (ip->i_df.if_bytes > 0) |
725eb1eb MT |
575 | xfs_idata_realloc(ip, -(ip->i_df.if_bytes), |
576 | XFS_DATA_FORK); | |
36b21dde | 577 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb MT |
578 | ASSERT(ip->i_df.if_bytes == 0); |
579 | return 0; | |
580 | } | |
581 | ||
36b21dde BF |
582 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
583 | ||
725eb1eb | 584 | /* remove the remote symlink */ |
36b21dde | 585 | return xfs_inactive_symlink_rmt(ip); |
725eb1eb | 586 | } |