Commit | Line | Data |
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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" | |
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 ----- */ | |
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 | 76 | if (!bp) |
2451337d | 77 | return -ENOMEM; |
19de7351 DC |
78 | error = bp->b_error; |
79 | if (error) { | |
80 | xfs_buf_ioerror_alert(bp, __func__); | |
81 | xfs_buf_relse(bp); | |
ac75a1f7 DC |
82 | |
83 | /* bad CRC means corrupted metadata */ | |
2451337d DC |
84 | if (error == -EFSBADCRC) |
85 | error = -EFSCORRUPTED; | |
19de7351 DC |
86 | goto out; |
87 | } | |
f948dd76 | 88 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); |
19de7351 DC |
89 | if (pathlen < byte_cnt) |
90 | byte_cnt = pathlen; | |
f948dd76 DC |
91 | |
92 | cur_chunk = bp->b_addr; | |
93 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
bda65ef8 | 94 | if (!xfs_symlink_hdr_ok(ip->i_ino, offset, |
f948dd76 | 95 | byte_cnt, bp)) { |
2451337d | 96 | error = -EFSCORRUPTED; |
f948dd76 DC |
97 | xfs_alert(mp, |
98 | "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)", | |
99 | offset, byte_cnt, ip->i_ino); | |
100 | xfs_buf_relse(bp); | |
101 | goto out; | |
102 | ||
103 | } | |
104 | ||
105 | cur_chunk += sizeof(struct xfs_dsymlink_hdr); | |
106 | } | |
107 | ||
2ac56d3d | 108 | memcpy(link + offset, cur_chunk, byte_cnt); |
f948dd76 | 109 | |
19de7351 | 110 | pathlen -= byte_cnt; |
f948dd76 | 111 | offset += byte_cnt; |
19de7351 | 112 | |
19de7351 DC |
113 | xfs_buf_relse(bp); |
114 | } | |
f948dd76 | 115 | ASSERT(pathlen == 0); |
19de7351 DC |
116 | |
117 | link[ip->i_d.di_size] = '\0'; | |
118 | error = 0; | |
119 | ||
120 | out: | |
121 | return error; | |
122 | } | |
123 | ||
124 | int | |
125 | xfs_readlink( | |
f948dd76 | 126 | struct xfs_inode *ip, |
19de7351 DC |
127 | char *link) |
128 | { | |
f948dd76 | 129 | struct xfs_mount *mp = ip->i_mount; |
19de7351 DC |
130 | xfs_fsize_t pathlen; |
131 | int error = 0; | |
132 | ||
133 | trace_xfs_readlink(ip); | |
134 | ||
30ee052e CH |
135 | ASSERT(!(ip->i_df.if_flags & XFS_IFINLINE)); |
136 | ||
19de7351 | 137 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 138 | return -EIO; |
19de7351 DC |
139 | |
140 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
141 | ||
142 | pathlen = ip->i_d.di_size; | |
143 | if (!pathlen) | |
144 | goto out; | |
145 | ||
146 | if (pathlen < 0 || pathlen > MAXPATHLEN) { | |
147 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", | |
148 | __func__, (unsigned long long) ip->i_ino, | |
149 | (long long) pathlen); | |
150 | ASSERT(0); | |
2451337d | 151 | error = -EFSCORRUPTED; |
19de7351 DC |
152 | goto out; |
153 | } | |
154 | ||
155 | ||
30ee052e | 156 | error = xfs_readlink_bmap(ip, link); |
19de7351 DC |
157 | |
158 | out: | |
159 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
160 | return error; | |
161 | } | |
162 | ||
163 | int | |
164 | xfs_symlink( | |
f948dd76 | 165 | struct xfs_inode *dp, |
19de7351 DC |
166 | struct xfs_name *link_name, |
167 | const char *target_path, | |
168 | umode_t mode, | |
f948dd76 | 169 | struct xfs_inode **ipp) |
19de7351 | 170 | { |
f948dd76 DC |
171 | struct xfs_mount *mp = dp->i_mount; |
172 | struct xfs_trans *tp = NULL; | |
173 | struct xfs_inode *ip = NULL; | |
174 | int error = 0; | |
19de7351 | 175 | int pathlen; |
2c3234d1 | 176 | struct xfs_defer_ops dfops; |
19de7351 | 177 | xfs_fsblock_t first_block; |
58c90473 | 178 | bool unlock_dp_on_error = false; |
19de7351 DC |
179 | xfs_fileoff_t first_fsb; |
180 | xfs_filblks_t fs_blocks; | |
181 | int nmaps; | |
f948dd76 | 182 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; |
19de7351 DC |
183 | xfs_daddr_t d; |
184 | const char *cur_chunk; | |
185 | int byte_cnt; | |
186 | int n; | |
187 | xfs_buf_t *bp; | |
188 | prid_t prid; | |
113a5683 CS |
189 | struct xfs_dquot *udqp = NULL; |
190 | struct xfs_dquot *gdqp = NULL; | |
92f8ff73 | 191 | struct xfs_dquot *pdqp = NULL; |
19de7351 DC |
192 | uint resblks; |
193 | ||
194 | *ipp = NULL; | |
19de7351 DC |
195 | |
196 | trace_xfs_symlink(dp, link_name); | |
197 | ||
198 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 199 | return -EIO; |
19de7351 DC |
200 | |
201 | /* | |
202 | * Check component lengths of the target path name. | |
203 | */ | |
204 | pathlen = strlen(target_path); | |
205 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
2451337d | 206 | return -ENAMETOOLONG; |
19de7351 DC |
207 | |
208 | udqp = gdqp = NULL; | |
163467d3 | 209 | prid = xfs_get_initial_prid(dp); |
19de7351 DC |
210 | |
211 | /* | |
212 | * Make sure that we have allocated dquot(s) on disk. | |
213 | */ | |
7aab1b28 DE |
214 | error = xfs_qm_vop_dqalloc(dp, |
215 | xfs_kuid_to_uid(current_fsuid()), | |
216 | xfs_kgid_to_gid(current_fsgid()), prid, | |
217 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, | |
218 | &udqp, &gdqp, &pdqp); | |
19de7351 | 219 | if (error) |
58c90473 | 220 | return error; |
19de7351 | 221 | |
19de7351 DC |
222 | /* |
223 | * The symlink will fit into the inode data fork? | |
224 | * There can't be any attributes so we get the whole variable part. | |
225 | */ | |
226 | if (pathlen <= XFS_LITINO(mp, dp->i_d.di_version)) | |
227 | fs_blocks = 0; | |
228 | else | |
321a9583 | 229 | fs_blocks = xfs_symlink_blocks(mp, pathlen); |
19de7351 | 230 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
253f4911 CH |
231 | |
232 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_symlink, resblks, 0, 0, &tp); | |
2451337d | 233 | if (error == -ENOSPC && fs_blocks == 0) { |
19de7351 | 234 | resblks = 0; |
253f4911 CH |
235 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_symlink, 0, 0, 0, |
236 | &tp); | |
19de7351 | 237 | } |
4906e215 | 238 | if (error) |
253f4911 | 239 | goto out_release_inode; |
19de7351 | 240 | |
dbad7c99 DC |
241 | xfs_ilock(dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL | |
242 | XFS_IOLOCK_PARENT | XFS_ILOCK_PARENT); | |
19de7351 DC |
243 | unlock_dp_on_error = true; |
244 | ||
245 | /* | |
246 | * Check whether the directory allows new symlinks or not. | |
247 | */ | |
248 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
2451337d | 249 | error = -EPERM; |
58c90473 | 250 | goto out_trans_cancel; |
19de7351 DC |
251 | } |
252 | ||
253 | /* | |
254 | * Reserve disk quota : blocks and inode. | |
255 | */ | |
92f8ff73 CS |
256 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, |
257 | pdqp, resblks, 1, 0); | |
19de7351 | 258 | if (error) |
58c90473 | 259 | goto out_trans_cancel; |
19de7351 DC |
260 | |
261 | /* | |
262 | * Check for ability to enter directory entry, if no space reserved. | |
263 | */ | |
94f3cad5 ES |
264 | if (!resblks) { |
265 | error = xfs_dir_canenter(tp, dp, link_name); | |
266 | if (error) | |
58c90473 | 267 | goto out_trans_cancel; |
94f3cad5 | 268 | } |
19de7351 DC |
269 | /* |
270 | * Initialize the bmap freelist prior to calling either | |
271 | * bmapi or the directory create code. | |
272 | */ | |
2c3234d1 | 273 | xfs_defer_init(&dfops, &first_block); |
19de7351 DC |
274 | |
275 | /* | |
276 | * Allocate an inode for the symlink. | |
277 | */ | |
278 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, | |
279 | prid, resblks > 0, &ip, NULL); | |
58c90473 DC |
280 | if (error) |
281 | goto out_trans_cancel; | |
19de7351 DC |
282 | |
283 | /* | |
58c90473 DC |
284 | * Now we join the directory inode to the transaction. We do not do it |
285 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
286 | * (and release all the locks). An error from here on will result in | |
287 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
19de7351 DC |
288 | * error path. |
289 | */ | |
dbad7c99 | 290 | xfs_trans_ijoin(tp, dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
19de7351 DC |
291 | unlock_dp_on_error = false; |
292 | ||
293 | /* | |
294 | * Also attach the dquot(s) to it, if applicable. | |
295 | */ | |
92f8ff73 | 296 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); |
19de7351 DC |
297 | |
298 | if (resblks) | |
299 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
300 | /* | |
301 | * If the symlink will fit into the inode, write it inline. | |
302 | */ | |
303 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
143f4aed | 304 | xfs_init_local_fork(ip, XFS_DATA_FORK, target_path, pathlen); |
19de7351 | 305 | |
143f4aed | 306 | ip->i_d.di_size = pathlen; |
19de7351 DC |
307 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; |
308 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
19de7351 | 309 | } else { |
f948dd76 DC |
310 | int offset; |
311 | ||
19de7351 DC |
312 | first_fsb = 0; |
313 | nmaps = XFS_SYMLINK_MAPS; | |
314 | ||
315 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, | |
316 | XFS_BMAPI_METADATA, &first_block, resblks, | |
2c3234d1 | 317 | mval, &nmaps, &dfops); |
19de7351 | 318 | if (error) |
58c90473 | 319 | goto out_bmap_cancel; |
19de7351 DC |
320 | |
321 | if (resblks) | |
322 | resblks -= fs_blocks; | |
323 | ip->i_d.di_size = pathlen; | |
324 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
325 | ||
326 | cur_chunk = target_path; | |
f948dd76 | 327 | offset = 0; |
19de7351 | 328 | for (n = 0; n < nmaps; n++) { |
321a9583 | 329 | char *buf; |
f948dd76 | 330 | |
19de7351 DC |
331 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
332 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
333 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
334 | BTOBB(byte_cnt), 0); | |
335 | if (!bp) { | |
2451337d | 336 | error = -ENOMEM; |
58c90473 | 337 | goto out_bmap_cancel; |
19de7351 | 338 | } |
f948dd76 DC |
339 | bp->b_ops = &xfs_symlink_buf_ops; |
340 | ||
341 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); | |
321a9583 | 342 | byte_cnt = min(byte_cnt, pathlen); |
19de7351 | 343 | |
f948dd76 DC |
344 | buf = bp->b_addr; |
345 | buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, | |
346 | byte_cnt, bp); | |
347 | ||
348 | memcpy(buf, cur_chunk, byte_cnt); | |
349 | ||
19de7351 | 350 | cur_chunk += byte_cnt; |
f948dd76 DC |
351 | pathlen -= byte_cnt; |
352 | offset += byte_cnt; | |
19de7351 | 353 | |
daf7b799 | 354 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF); |
f948dd76 DC |
355 | xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - |
356 | (char *)bp->b_addr); | |
19de7351 | 357 | } |
321a9583 | 358 | ASSERT(pathlen == 0); |
19de7351 DC |
359 | } |
360 | ||
361 | /* | |
362 | * Create the directory entry for the symlink. | |
363 | */ | |
364 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, | |
2c3234d1 | 365 | &first_block, &dfops, resblks); |
19de7351 | 366 | if (error) |
58c90473 | 367 | goto out_bmap_cancel; |
19de7351 DC |
368 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
369 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
370 | ||
371 | /* | |
372 | * If this is a synchronous mount, make sure that the | |
373 | * symlink transaction goes to disk before returning to | |
374 | * the user. | |
375 | */ | |
376 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
377 | xfs_trans_set_sync(tp); | |
378 | } | |
379 | ||
2c3234d1 | 380 | error = xfs_defer_finish(&tp, &dfops, NULL); |
58c90473 DC |
381 | if (error) |
382 | goto out_bmap_cancel; | |
383 | ||
70393313 | 384 | error = xfs_trans_commit(tp); |
58c90473 DC |
385 | if (error) |
386 | goto out_release_inode; | |
387 | ||
19de7351 DC |
388 | xfs_qm_dqrele(udqp); |
389 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 390 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
391 | |
392 | *ipp = ip; | |
393 | return 0; | |
394 | ||
58c90473 | 395 | out_bmap_cancel: |
2c3234d1 | 396 | xfs_defer_cancel(&dfops); |
58c90473 | 397 | out_trans_cancel: |
4906e215 | 398 | xfs_trans_cancel(tp); |
58c90473 DC |
399 | out_release_inode: |
400 | /* | |
401 | * Wait until after the current transaction is aborted to finish the | |
402 | * setup of the inode and release the inode. This prevents recursive | |
403 | * transactions and deadlocks from xfs_inactive. | |
404 | */ | |
405 | if (ip) { | |
406 | xfs_finish_inode_setup(ip); | |
407 | IRELE(ip); | |
408 | } | |
409 | ||
19de7351 DC |
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) | |
dbad7c99 | 415 | xfs_iunlock(dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
19de7351 DC |
416 | return error; |
417 | } | |
418 | ||
419 | /* | |
420 | * Free a symlink that has blocks associated with it. | |
421 | */ | |
725eb1eb | 422 | STATIC int |
19de7351 | 423 | xfs_inactive_symlink_rmt( |
36b21dde | 424 | struct xfs_inode *ip) |
19de7351 DC |
425 | { |
426 | xfs_buf_t *bp; | |
19de7351 DC |
427 | int done; |
428 | int error; | |
429 | xfs_fsblock_t first_block; | |
2c3234d1 | 430 | struct xfs_defer_ops dfops; |
19de7351 DC |
431 | int i; |
432 | xfs_mount_t *mp; | |
433 | xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; | |
434 | int nmaps; | |
19de7351 DC |
435 | int size; |
436 | xfs_trans_t *tp; | |
437 | ||
19de7351 | 438 | mp = ip->i_mount; |
725eb1eb | 439 | ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS); |
19de7351 DC |
440 | /* |
441 | * We're freeing a symlink that has some | |
442 | * blocks allocated to it. Free the | |
443 | * blocks here. We know that we've got | |
444 | * either 1 or 2 extents and that we can | |
445 | * free them all in one bunmapi call. | |
446 | */ | |
447 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
448 | ||
253f4911 CH |
449 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
450 | if (error) | |
36b21dde | 451 | return error; |
36b21dde BF |
452 | |
453 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
454 | xfs_trans_ijoin(tp, ip, 0); | |
455 | ||
19de7351 DC |
456 | /* |
457 | * Lock the inode, fix the size, and join it to the transaction. | |
458 | * Hold it so in the normal path, we still have it locked for | |
459 | * the second transaction. In the error paths we need it | |
460 | * held so the cancel won't rele it, see below. | |
461 | */ | |
462 | size = (int)ip->i_d.di_size; | |
463 | ip->i_d.di_size = 0; | |
464 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
465 | /* | |
466 | * Find the block(s) so we can inval and unmap them. | |
467 | */ | |
468 | done = 0; | |
2c3234d1 | 469 | xfs_defer_init(&dfops, &first_block); |
19de7351 | 470 | nmaps = ARRAY_SIZE(mval); |
f948dd76 | 471 | error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), |
19de7351 DC |
472 | mval, &nmaps, 0); |
473 | if (error) | |
36b21dde | 474 | goto error_trans_cancel; |
19de7351 | 475 | /* |
f948dd76 | 476 | * Invalidate the block(s). No validation is done. |
19de7351 DC |
477 | */ |
478 | for (i = 0; i < nmaps; i++) { | |
479 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
480 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
481 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
482 | if (!bp) { | |
2451337d | 483 | error = -ENOMEM; |
36b21dde | 484 | goto error_bmap_cancel; |
19de7351 DC |
485 | } |
486 | xfs_trans_binval(tp, bp); | |
487 | } | |
488 | /* | |
2c3234d1 | 489 | * Unmap the dead block(s) to the dfops. |
19de7351 | 490 | */ |
ab7bb610 | 491 | error = xfs_bunmapi(tp, ip, 0, size, 0, nmaps, |
2c3234d1 | 492 | &first_block, &dfops, &done); |
36b21dde BF |
493 | if (error) |
494 | goto error_bmap_cancel; | |
19de7351 DC |
495 | ASSERT(done); |
496 | /* | |
497 | * Commit the first transaction. This logs the EFI and the inode. | |
498 | */ | |
2c3234d1 | 499 | error = xfs_defer_finish(&tp, &dfops, ip); |
36b21dde BF |
500 | if (error) |
501 | goto error_bmap_cancel; | |
19de7351 DC |
502 | /* |
503 | * The first xact was committed, so add the inode to the new one. | |
504 | * Mark it dirty so it will be logged and moved forward in the log as | |
505 | * part of every commit. | |
506 | */ | |
507 | xfs_trans_ijoin(tp, ip, 0); | |
508 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
19de7351 DC |
509 | /* |
510 | * Commit the transaction containing extent freeing and EFDs. | |
19de7351 | 511 | */ |
70393313 | 512 | error = xfs_trans_commit(tp); |
19de7351 DC |
513 | if (error) { |
514 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
36b21dde | 515 | goto error_unlock; |
19de7351 | 516 | } |
19de7351 DC |
517 | |
518 | /* | |
519 | * Remove the memory for extent descriptions (just bookkeeping). | |
520 | */ | |
521 | if (ip->i_df.if_bytes) | |
522 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
523 | ASSERT(ip->i_df.if_bytes == 0); | |
19de7351 | 524 | |
36b21dde | 525 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
19de7351 DC |
526 | return 0; |
527 | ||
36b21dde | 528 | error_bmap_cancel: |
2c3234d1 | 529 | xfs_defer_cancel(&dfops); |
36b21dde | 530 | error_trans_cancel: |
4906e215 | 531 | xfs_trans_cancel(tp); |
36b21dde BF |
532 | error_unlock: |
533 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
19de7351 DC |
534 | return error; |
535 | } | |
725eb1eb MT |
536 | |
537 | /* | |
538 | * xfs_inactive_symlink - free a symlink | |
539 | */ | |
540 | int | |
541 | xfs_inactive_symlink( | |
36b21dde | 542 | struct xfs_inode *ip) |
725eb1eb MT |
543 | { |
544 | struct xfs_mount *mp = ip->i_mount; | |
545 | int pathlen; | |
546 | ||
547 | trace_xfs_inactive_symlink(ip); | |
548 | ||
725eb1eb | 549 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 550 | return -EIO; |
725eb1eb | 551 | |
36b21dde BF |
552 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
553 | ||
725eb1eb MT |
554 | /* |
555 | * Zero length symlinks _can_ exist. | |
556 | */ | |
557 | pathlen = (int)ip->i_d.di_size; | |
36b21dde BF |
558 | if (!pathlen) { |
559 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
725eb1eb | 560 | return 0; |
36b21dde | 561 | } |
725eb1eb MT |
562 | |
563 | if (pathlen < 0 || pathlen > MAXPATHLEN) { | |
564 | xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", | |
565 | __func__, (unsigned long long)ip->i_ino, pathlen); | |
36b21dde | 566 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb | 567 | ASSERT(0); |
2451337d | 568 | return -EFSCORRUPTED; |
725eb1eb MT |
569 | } |
570 | ||
571 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
36b21dde | 572 | if (ip->i_df.if_bytes > 0) |
725eb1eb MT |
573 | xfs_idata_realloc(ip, -(ip->i_df.if_bytes), |
574 | XFS_DATA_FORK); | |
36b21dde | 575 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb MT |
576 | ASSERT(ip->i_df.if_bytes == 0); |
577 | return 0; | |
578 | } | |
579 | ||
36b21dde BF |
580 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
581 | ||
725eb1eb | 582 | /* remove the remote symlink */ |
36b21dde | 583 | return xfs_inactive_symlink_rmt(ip); |
725eb1eb | 584 | } |