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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" | |
20 | #include "xfs_fs.h" | |
6ca1c906 | 21 | #include "xfs_format.h" |
19de7351 DC |
22 | #include "xfs_bit.h" |
23 | #include "xfs_log.h" | |
24 | #include "xfs_trans.h" | |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
19de7351 DC |
27 | #include "xfs_mount.h" |
28 | #include "xfs_da_btree.h" | |
2b9ab5ab DC |
29 | #include "xfs_dir2_format.h" |
30 | #include "xfs_dir2.h" | |
19de7351 DC |
31 | #include "xfs_bmap_btree.h" |
32 | #include "xfs_ialloc_btree.h" | |
33 | #include "xfs_dinode.h" | |
34 | #include "xfs_inode.h" | |
19de7351 DC |
35 | #include "xfs_ialloc.h" |
36 | #include "xfs_alloc.h" | |
37 | #include "xfs_bmap.h" | |
68988114 | 38 | #include "xfs_bmap_util.h" |
19de7351 DC |
39 | #include "xfs_error.h" |
40 | #include "xfs_quota.h" | |
19de7351 | 41 | #include "xfs_trans_space.h" |
19de7351 DC |
42 | #include "xfs_trace.h" |
43 | #include "xfs_symlink.h" | |
19de7351 DC |
44 | |
45 | /* ----- Kernel only functions below ----- */ | |
19de7351 DC |
46 | STATIC int |
47 | xfs_readlink_bmap( | |
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 | |
f948dd76 DC |
64 | fsblocks = xfs_symlink_blocks(mp, pathlen); |
65 | error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0); | |
19de7351 DC |
66 | if (error) |
67 | goto out; | |
68 | ||
f948dd76 | 69 | offset = 0; |
19de7351 DC |
70 | for (n = 0; n < nmaps; n++) { |
71 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
72 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
73 | ||
f948dd76 DC |
74 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, |
75 | &xfs_symlink_buf_ops); | |
19de7351 DC |
76 | if (!bp) |
77 | return XFS_ERROR(ENOMEM); | |
78 | error = bp->b_error; | |
79 | if (error) { | |
80 | xfs_buf_ioerror_alert(bp, __func__); | |
81 | xfs_buf_relse(bp); | |
82 | goto out; | |
83 | } | |
f948dd76 | 84 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); |
19de7351 DC |
85 | if (pathlen < byte_cnt) |
86 | byte_cnt = pathlen; | |
f948dd76 DC |
87 | |
88 | cur_chunk = bp->b_addr; | |
89 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
90 | if (!xfs_symlink_hdr_ok(mp, ip->i_ino, offset, | |
91 | byte_cnt, bp)) { | |
92 | error = EFSCORRUPTED; | |
93 | xfs_alert(mp, | |
94 | "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)", | |
95 | offset, byte_cnt, ip->i_ino); | |
96 | xfs_buf_relse(bp); | |
97 | goto out; | |
98 | ||
99 | } | |
100 | ||
101 | cur_chunk += sizeof(struct xfs_dsymlink_hdr); | |
102 | } | |
103 | ||
104 | memcpy(link + offset, bp->b_addr, byte_cnt); | |
105 | ||
19de7351 | 106 | pathlen -= byte_cnt; |
f948dd76 | 107 | offset += byte_cnt; |
19de7351 | 108 | |
19de7351 DC |
109 | xfs_buf_relse(bp); |
110 | } | |
f948dd76 | 111 | ASSERT(pathlen == 0); |
19de7351 DC |
112 | |
113 | link[ip->i_d.di_size] = '\0'; | |
114 | error = 0; | |
115 | ||
116 | out: | |
117 | return error; | |
118 | } | |
119 | ||
120 | int | |
121 | xfs_readlink( | |
f948dd76 | 122 | struct xfs_inode *ip, |
19de7351 DC |
123 | char *link) |
124 | { | |
f948dd76 | 125 | struct xfs_mount *mp = ip->i_mount; |
19de7351 DC |
126 | xfs_fsize_t pathlen; |
127 | int error = 0; | |
128 | ||
129 | trace_xfs_readlink(ip); | |
130 | ||
131 | if (XFS_FORCED_SHUTDOWN(mp)) | |
132 | return XFS_ERROR(EIO); | |
133 | ||
134 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
135 | ||
136 | pathlen = ip->i_d.di_size; | |
137 | if (!pathlen) | |
138 | goto out; | |
139 | ||
140 | if (pathlen < 0 || pathlen > MAXPATHLEN) { | |
141 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", | |
142 | __func__, (unsigned long long) ip->i_ino, | |
143 | (long long) pathlen); | |
144 | ASSERT(0); | |
145 | error = XFS_ERROR(EFSCORRUPTED); | |
146 | goto out; | |
147 | } | |
148 | ||
149 | ||
150 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
151 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); | |
152 | link[pathlen] = '\0'; | |
153 | } else { | |
154 | error = xfs_readlink_bmap(ip, link); | |
155 | } | |
156 | ||
157 | out: | |
158 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
159 | return error; | |
160 | } | |
161 | ||
162 | int | |
163 | xfs_symlink( | |
f948dd76 | 164 | struct xfs_inode *dp, |
19de7351 DC |
165 | struct xfs_name *link_name, |
166 | const char *target_path, | |
167 | umode_t mode, | |
f948dd76 | 168 | struct xfs_inode **ipp) |
19de7351 | 169 | { |
f948dd76 DC |
170 | struct xfs_mount *mp = dp->i_mount; |
171 | struct xfs_trans *tp = NULL; | |
172 | struct xfs_inode *ip = NULL; | |
173 | int error = 0; | |
19de7351 | 174 | int pathlen; |
f948dd76 | 175 | struct xfs_bmap_free free_list; |
19de7351 | 176 | xfs_fsblock_t first_block; |
f948dd76 | 177 | bool unlock_dp_on_error = false; |
19de7351 DC |
178 | uint cancel_flags; |
179 | int committed; | |
180 | xfs_fileoff_t first_fsb; | |
181 | xfs_filblks_t fs_blocks; | |
182 | int nmaps; | |
f948dd76 | 183 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; |
19de7351 DC |
184 | xfs_daddr_t d; |
185 | const char *cur_chunk; | |
186 | int byte_cnt; | |
187 | int n; | |
188 | xfs_buf_t *bp; | |
189 | prid_t prid; | |
113a5683 CS |
190 | struct xfs_dquot *udqp = NULL; |
191 | struct xfs_dquot *gdqp = NULL; | |
92f8ff73 | 192 | struct xfs_dquot *pdqp = NULL; |
19de7351 DC |
193 | uint resblks; |
194 | ||
195 | *ipp = NULL; | |
19de7351 DC |
196 | |
197 | trace_xfs_symlink(dp, link_name); | |
198 | ||
199 | if (XFS_FORCED_SHUTDOWN(mp)) | |
200 | return XFS_ERROR(EIO); | |
201 | ||
202 | /* | |
203 | * Check component lengths of the target path name. | |
204 | */ | |
205 | pathlen = strlen(target_path); | |
206 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
207 | return XFS_ERROR(ENAMETOOLONG); | |
208 | ||
209 | udqp = gdqp = NULL; | |
210 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) | |
211 | prid = xfs_get_projid(dp); | |
212 | else | |
213 | prid = XFS_PROJID_DEFAULT; | |
214 | ||
215 | /* | |
216 | * Make sure that we have allocated dquot(s) on disk. | |
217 | */ | |
7aab1b28 DE |
218 | error = xfs_qm_vop_dqalloc(dp, |
219 | xfs_kuid_to_uid(current_fsuid()), | |
220 | xfs_kgid_to_gid(current_fsgid()), prid, | |
221 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, | |
222 | &udqp, &gdqp, &pdqp); | |
19de7351 DC |
223 | if (error) |
224 | goto std_return; | |
225 | ||
226 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
227 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
228 | /* | |
229 | * The symlink will fit into the inode data fork? | |
230 | * There can't be any attributes so we get the whole variable part. | |
231 | */ | |
232 | if (pathlen <= XFS_LITINO(mp, dp->i_d.di_version)) | |
233 | fs_blocks = 0; | |
234 | else | |
321a9583 | 235 | fs_blocks = xfs_symlink_blocks(mp, pathlen); |
19de7351 | 236 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
3d3c8b52 | 237 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_symlink, resblks, 0); |
19de7351 DC |
238 | if (error == ENOSPC && fs_blocks == 0) { |
239 | resblks = 0; | |
3d3c8b52 | 240 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_symlink, 0, 0); |
19de7351 DC |
241 | } |
242 | if (error) { | |
243 | cancel_flags = 0; | |
244 | goto error_return; | |
245 | } | |
246 | ||
247 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); | |
248 | unlock_dp_on_error = true; | |
249 | ||
250 | /* | |
251 | * Check whether the directory allows new symlinks or not. | |
252 | */ | |
253 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
254 | error = XFS_ERROR(EPERM); | |
255 | goto error_return; | |
256 | } | |
257 | ||
258 | /* | |
259 | * Reserve disk quota : blocks and inode. | |
260 | */ | |
92f8ff73 CS |
261 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, |
262 | pdqp, resblks, 1, 0); | |
19de7351 DC |
263 | if (error) |
264 | goto error_return; | |
265 | ||
266 | /* | |
267 | * Check for ability to enter directory entry, if no space reserved. | |
268 | */ | |
269 | error = xfs_dir_canenter(tp, dp, link_name, resblks); | |
270 | if (error) | |
271 | goto error_return; | |
272 | /* | |
273 | * Initialize the bmap freelist prior to calling either | |
274 | * bmapi or the directory create code. | |
275 | */ | |
276 | xfs_bmap_init(&free_list, &first_block); | |
277 | ||
278 | /* | |
279 | * Allocate an inode for the symlink. | |
280 | */ | |
281 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, | |
282 | prid, resblks > 0, &ip, NULL); | |
283 | if (error) { | |
284 | if (error == ENOSPC) | |
285 | goto error_return; | |
286 | goto error1; | |
287 | } | |
288 | ||
289 | /* | |
290 | * An error after we've joined dp to the transaction will result in the | |
291 | * transaction cancel unlocking dp so don't do it explicitly in the | |
292 | * error path. | |
293 | */ | |
294 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); | |
295 | unlock_dp_on_error = false; | |
296 | ||
297 | /* | |
298 | * Also attach the dquot(s) to it, if applicable. | |
299 | */ | |
92f8ff73 | 300 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); |
19de7351 DC |
301 | |
302 | if (resblks) | |
303 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
304 | /* | |
305 | * If the symlink will fit into the inode, write it inline. | |
306 | */ | |
307 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
308 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
309 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
310 | ip->i_d.di_size = pathlen; | |
311 | ||
312 | /* | |
313 | * The inode was initially created in extent format. | |
314 | */ | |
315 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
316 | ip->i_df.if_flags |= XFS_IFINLINE; | |
317 | ||
318 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
319 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
320 | ||
321 | } else { | |
f948dd76 DC |
322 | int offset; |
323 | ||
19de7351 DC |
324 | first_fsb = 0; |
325 | nmaps = XFS_SYMLINK_MAPS; | |
326 | ||
327 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, | |
328 | XFS_BMAPI_METADATA, &first_block, resblks, | |
329 | mval, &nmaps, &free_list); | |
330 | if (error) | |
331 | goto error2; | |
332 | ||
333 | if (resblks) | |
334 | resblks -= fs_blocks; | |
335 | ip->i_d.di_size = pathlen; | |
336 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
337 | ||
338 | cur_chunk = target_path; | |
f948dd76 | 339 | offset = 0; |
19de7351 | 340 | for (n = 0; n < nmaps; n++) { |
321a9583 | 341 | char *buf; |
f948dd76 | 342 | |
19de7351 DC |
343 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
344 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
345 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
346 | BTOBB(byte_cnt), 0); | |
347 | if (!bp) { | |
348 | error = ENOMEM; | |
349 | goto error2; | |
350 | } | |
f948dd76 DC |
351 | bp->b_ops = &xfs_symlink_buf_ops; |
352 | ||
353 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); | |
321a9583 | 354 | byte_cnt = min(byte_cnt, pathlen); |
19de7351 | 355 | |
f948dd76 DC |
356 | buf = bp->b_addr; |
357 | buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, | |
358 | byte_cnt, bp); | |
359 | ||
360 | memcpy(buf, cur_chunk, byte_cnt); | |
361 | ||
19de7351 | 362 | cur_chunk += byte_cnt; |
f948dd76 DC |
363 | pathlen -= byte_cnt; |
364 | offset += byte_cnt; | |
19de7351 | 365 | |
f948dd76 DC |
366 | xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - |
367 | (char *)bp->b_addr); | |
19de7351 | 368 | } |
321a9583 | 369 | ASSERT(pathlen == 0); |
19de7351 DC |
370 | } |
371 | ||
372 | /* | |
373 | * Create the directory entry for the symlink. | |
374 | */ | |
375 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, | |
376 | &first_block, &free_list, resblks); | |
377 | if (error) | |
378 | goto error2; | |
379 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
380 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
381 | ||
382 | /* | |
383 | * If this is a synchronous mount, make sure that the | |
384 | * symlink transaction goes to disk before returning to | |
385 | * the user. | |
386 | */ | |
387 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
388 | xfs_trans_set_sync(tp); | |
389 | } | |
390 | ||
391 | error = xfs_bmap_finish(&tp, &free_list, &committed); | |
392 | if (error) { | |
393 | goto error2; | |
394 | } | |
395 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
396 | xfs_qm_dqrele(udqp); | |
397 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 398 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
399 | |
400 | *ipp = ip; | |
401 | return 0; | |
402 | ||
403 | error2: | |
404 | IRELE(ip); | |
405 | error1: | |
406 | xfs_bmap_cancel(&free_list); | |
407 | cancel_flags |= XFS_TRANS_ABORT; | |
408 | error_return: | |
409 | xfs_trans_cancel(tp, cancel_flags); | |
410 | xfs_qm_dqrele(udqp); | |
411 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 412 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
413 | |
414 | if (unlock_dp_on_error) | |
415 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
416 | std_return: | |
417 | return error; | |
418 | } | |
419 | ||
420 | /* | |
421 | * Free a symlink that has blocks associated with it. | |
422 | */ | |
725eb1eb | 423 | STATIC int |
19de7351 DC |
424 | xfs_inactive_symlink_rmt( |
425 | xfs_inode_t *ip, | |
426 | xfs_trans_t **tpp) | |
427 | { | |
428 | xfs_buf_t *bp; | |
429 | int committed; | |
430 | int done; | |
431 | int error; | |
432 | xfs_fsblock_t first_block; | |
433 | xfs_bmap_free_t free_list; | |
434 | int i; | |
435 | xfs_mount_t *mp; | |
436 | xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; | |
437 | int nmaps; | |
438 | xfs_trans_t *ntp; | |
439 | int size; | |
440 | xfs_trans_t *tp; | |
441 | ||
442 | tp = *tpp; | |
443 | mp = ip->i_mount; | |
725eb1eb | 444 | ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS); |
19de7351 DC |
445 | /* |
446 | * We're freeing a symlink that has some | |
447 | * blocks allocated to it. Free the | |
448 | * blocks here. We know that we've got | |
449 | * either 1 or 2 extents and that we can | |
450 | * free them all in one bunmapi call. | |
451 | */ | |
452 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
453 | ||
454 | /* | |
455 | * Lock the inode, fix the size, and join it to the transaction. | |
456 | * Hold it so in the normal path, we still have it locked for | |
457 | * the second transaction. In the error paths we need it | |
458 | * held so the cancel won't rele it, see below. | |
459 | */ | |
460 | size = (int)ip->i_d.di_size; | |
461 | ip->i_d.di_size = 0; | |
462 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
463 | /* | |
464 | * Find the block(s) so we can inval and unmap them. | |
465 | */ | |
466 | done = 0; | |
467 | xfs_bmap_init(&free_list, &first_block); | |
468 | nmaps = ARRAY_SIZE(mval); | |
f948dd76 | 469 | error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), |
19de7351 DC |
470 | mval, &nmaps, 0); |
471 | if (error) | |
472 | goto error0; | |
473 | /* | |
f948dd76 | 474 | * Invalidate the block(s). No validation is done. |
19de7351 DC |
475 | */ |
476 | for (i = 0; i < nmaps; i++) { | |
477 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
478 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
479 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
480 | if (!bp) { | |
481 | error = ENOMEM; | |
482 | goto error1; | |
483 | } | |
484 | xfs_trans_binval(tp, bp); | |
485 | } | |
486 | /* | |
487 | * Unmap the dead block(s) to the free_list. | |
488 | */ | |
489 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, | |
490 | &first_block, &free_list, &done))) | |
491 | goto error1; | |
492 | ASSERT(done); | |
493 | /* | |
494 | * Commit the first transaction. This logs the EFI and the inode. | |
495 | */ | |
496 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) | |
497 | goto error1; | |
498 | /* | |
499 | * The transaction must have been committed, since there were | |
500 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
501 | * The new tp has the extent freeing and EFDs. | |
502 | */ | |
503 | ASSERT(committed); | |
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); | |
511 | /* | |
512 | * Get a new, empty transaction to return to our caller. | |
513 | */ | |
514 | ntp = xfs_trans_dup(tp); | |
515 | /* | |
516 | * Commit the transaction containing extent freeing and EFDs. | |
517 | * If we get an error on the commit here or on the reserve below, | |
518 | * we need to unlock the inode since the new transaction doesn't | |
519 | * have the inode attached. | |
520 | */ | |
521 | error = xfs_trans_commit(tp, 0); | |
522 | tp = ntp; | |
523 | if (error) { | |
524 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
525 | goto error0; | |
526 | } | |
527 | /* | |
528 | * transaction commit worked ok so we can drop the extra ticket | |
529 | * reference that we gained in xfs_trans_dup() | |
530 | */ | |
531 | xfs_log_ticket_put(tp->t_ticket); | |
532 | ||
533 | /* | |
534 | * Remove the memory for extent descriptions (just bookkeeping). | |
535 | */ | |
536 | if (ip->i_df.if_bytes) | |
537 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
538 | ASSERT(ip->i_df.if_bytes == 0); | |
539 | /* | |
540 | * Put an itruncate log reservation in the new transaction | |
541 | * for our caller. | |
542 | */ | |
3d3c8b52 JL |
543 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); |
544 | if (error) { | |
19de7351 DC |
545 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
546 | goto error0; | |
547 | } | |
548 | ||
549 | xfs_trans_ijoin(tp, ip, 0); | |
550 | *tpp = tp; | |
551 | return 0; | |
552 | ||
553 | error1: | |
554 | xfs_bmap_cancel(&free_list); | |
555 | error0: | |
556 | return error; | |
557 | } | |
725eb1eb MT |
558 | |
559 | /* | |
560 | * xfs_inactive_symlink - free a symlink | |
561 | */ | |
562 | int | |
563 | xfs_inactive_symlink( | |
564 | struct xfs_inode *ip, | |
565 | struct xfs_trans **tp) | |
566 | { | |
567 | struct xfs_mount *mp = ip->i_mount; | |
568 | int pathlen; | |
569 | ||
570 | trace_xfs_inactive_symlink(ip); | |
571 | ||
572 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
573 | ||
574 | if (XFS_FORCED_SHUTDOWN(mp)) | |
575 | return XFS_ERROR(EIO); | |
576 | ||
577 | /* | |
578 | * Zero length symlinks _can_ exist. | |
579 | */ | |
580 | pathlen = (int)ip->i_d.di_size; | |
581 | if (!pathlen) | |
582 | return 0; | |
583 | ||
584 | if (pathlen < 0 || pathlen > MAXPATHLEN) { | |
585 | xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", | |
586 | __func__, (unsigned long long)ip->i_ino, pathlen); | |
587 | ASSERT(0); | |
588 | return XFS_ERROR(EFSCORRUPTED); | |
589 | } | |
590 | ||
591 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
592 | if (ip->i_df.if_bytes > 0) | |
593 | xfs_idata_realloc(ip, -(ip->i_df.if_bytes), | |
594 | XFS_DATA_FORK); | |
595 | ASSERT(ip->i_df.if_bytes == 0); | |
596 | return 0; | |
597 | } | |
598 | ||
599 | /* remove the remote symlink */ | |
600 | return xfs_inactive_symlink_rmt(ip, tp); | |
601 | } |