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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 | |
65523218 | 241 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
19de7351 DC |
242 | unlock_dp_on_error = true; |
243 | ||
244 | /* | |
245 | * Check whether the directory allows new symlinks or not. | |
246 | */ | |
247 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
2451337d | 248 | error = -EPERM; |
58c90473 | 249 | goto out_trans_cancel; |
19de7351 DC |
250 | } |
251 | ||
252 | /* | |
253 | * Reserve disk quota : blocks and inode. | |
254 | */ | |
92f8ff73 CS |
255 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, |
256 | pdqp, resblks, 1, 0); | |
19de7351 | 257 | if (error) |
58c90473 | 258 | goto out_trans_cancel; |
19de7351 DC |
259 | |
260 | /* | |
261 | * Check for ability to enter directory entry, if no space reserved. | |
262 | */ | |
94f3cad5 ES |
263 | if (!resblks) { |
264 | error = xfs_dir_canenter(tp, dp, link_name); | |
265 | if (error) | |
58c90473 | 266 | goto out_trans_cancel; |
94f3cad5 | 267 | } |
19de7351 DC |
268 | /* |
269 | * Initialize the bmap freelist prior to calling either | |
270 | * bmapi or the directory create code. | |
271 | */ | |
2c3234d1 | 272 | xfs_defer_init(&dfops, &first_block); |
19de7351 DC |
273 | |
274 | /* | |
275 | * Allocate an inode for the symlink. | |
276 | */ | |
277 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, | |
278 | prid, resblks > 0, &ip, NULL); | |
58c90473 DC |
279 | if (error) |
280 | goto out_trans_cancel; | |
19de7351 DC |
281 | |
282 | /* | |
58c90473 DC |
283 | * Now we join the directory inode to the transaction. We do not do it |
284 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
285 | * (and release all the locks). An error from here on will result in | |
286 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
19de7351 DC |
287 | * error path. |
288 | */ | |
65523218 | 289 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
19de7351 DC |
290 | unlock_dp_on_error = false; |
291 | ||
292 | /* | |
293 | * Also attach the dquot(s) to it, if applicable. | |
294 | */ | |
92f8ff73 | 295 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); |
19de7351 DC |
296 | |
297 | if (resblks) | |
298 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
299 | /* | |
300 | * If the symlink will fit into the inode, write it inline. | |
301 | */ | |
302 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
143f4aed | 303 | xfs_init_local_fork(ip, XFS_DATA_FORK, target_path, pathlen); |
19de7351 | 304 | |
143f4aed | 305 | ip->i_d.di_size = pathlen; |
19de7351 DC |
306 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; |
307 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
19de7351 | 308 | } else { |
f948dd76 DC |
309 | int offset; |
310 | ||
19de7351 DC |
311 | first_fsb = 0; |
312 | nmaps = XFS_SYMLINK_MAPS; | |
313 | ||
314 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, | |
315 | XFS_BMAPI_METADATA, &first_block, resblks, | |
2c3234d1 | 316 | mval, &nmaps, &dfops); |
19de7351 | 317 | if (error) |
58c90473 | 318 | goto out_bmap_cancel; |
19de7351 DC |
319 | |
320 | if (resblks) | |
321 | resblks -= fs_blocks; | |
322 | ip->i_d.di_size = pathlen; | |
323 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
324 | ||
325 | cur_chunk = target_path; | |
f948dd76 | 326 | offset = 0; |
19de7351 | 327 | for (n = 0; n < nmaps; n++) { |
321a9583 | 328 | char *buf; |
f948dd76 | 329 | |
19de7351 DC |
330 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
331 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
332 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
333 | BTOBB(byte_cnt), 0); | |
334 | if (!bp) { | |
2451337d | 335 | error = -ENOMEM; |
58c90473 | 336 | goto out_bmap_cancel; |
19de7351 | 337 | } |
f948dd76 DC |
338 | bp->b_ops = &xfs_symlink_buf_ops; |
339 | ||
340 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); | |
321a9583 | 341 | byte_cnt = min(byte_cnt, pathlen); |
19de7351 | 342 | |
f948dd76 DC |
343 | buf = bp->b_addr; |
344 | buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, | |
345 | byte_cnt, bp); | |
346 | ||
347 | memcpy(buf, cur_chunk, byte_cnt); | |
348 | ||
19de7351 | 349 | cur_chunk += byte_cnt; |
f948dd76 DC |
350 | pathlen -= byte_cnt; |
351 | offset += byte_cnt; | |
19de7351 | 352 | |
daf7b799 | 353 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF); |
f948dd76 DC |
354 | xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - |
355 | (char *)bp->b_addr); | |
19de7351 | 356 | } |
321a9583 | 357 | ASSERT(pathlen == 0); |
19de7351 DC |
358 | } |
359 | ||
360 | /* | |
361 | * Create the directory entry for the symlink. | |
362 | */ | |
363 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, | |
2c3234d1 | 364 | &first_block, &dfops, resblks); |
19de7351 | 365 | if (error) |
58c90473 | 366 | goto out_bmap_cancel; |
19de7351 DC |
367 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
368 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
369 | ||
370 | /* | |
371 | * If this is a synchronous mount, make sure that the | |
372 | * symlink transaction goes to disk before returning to | |
373 | * the user. | |
374 | */ | |
375 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
376 | xfs_trans_set_sync(tp); | |
377 | } | |
378 | ||
2c3234d1 | 379 | error = xfs_defer_finish(&tp, &dfops, NULL); |
58c90473 DC |
380 | if (error) |
381 | goto out_bmap_cancel; | |
382 | ||
70393313 | 383 | error = xfs_trans_commit(tp); |
58c90473 DC |
384 | if (error) |
385 | goto out_release_inode; | |
386 | ||
19de7351 DC |
387 | xfs_qm_dqrele(udqp); |
388 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 389 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
390 | |
391 | *ipp = ip; | |
392 | return 0; | |
393 | ||
58c90473 | 394 | out_bmap_cancel: |
2c3234d1 | 395 | xfs_defer_cancel(&dfops); |
58c90473 | 396 | out_trans_cancel: |
4906e215 | 397 | xfs_trans_cancel(tp); |
58c90473 DC |
398 | out_release_inode: |
399 | /* | |
400 | * Wait until after the current transaction is aborted to finish the | |
401 | * setup of the inode and release the inode. This prevents recursive | |
402 | * transactions and deadlocks from xfs_inactive. | |
403 | */ | |
404 | if (ip) { | |
405 | xfs_finish_inode_setup(ip); | |
406 | IRELE(ip); | |
407 | } | |
408 | ||
19de7351 DC |
409 | xfs_qm_dqrele(udqp); |
410 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 411 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
412 | |
413 | if (unlock_dp_on_error) | |
65523218 | 414 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
19de7351 DC |
415 | return error; |
416 | } | |
417 | ||
418 | /* | |
419 | * Free a symlink that has blocks associated with it. | |
420 | */ | |
725eb1eb | 421 | STATIC int |
19de7351 | 422 | xfs_inactive_symlink_rmt( |
36b21dde | 423 | struct xfs_inode *ip) |
19de7351 DC |
424 | { |
425 | xfs_buf_t *bp; | |
19de7351 DC |
426 | int done; |
427 | int error; | |
428 | xfs_fsblock_t first_block; | |
2c3234d1 | 429 | struct xfs_defer_ops dfops; |
19de7351 DC |
430 | int i; |
431 | xfs_mount_t *mp; | |
432 | xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; | |
433 | int nmaps; | |
19de7351 DC |
434 | int size; |
435 | xfs_trans_t *tp; | |
436 | ||
19de7351 | 437 | mp = ip->i_mount; |
725eb1eb | 438 | ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS); |
19de7351 DC |
439 | /* |
440 | * We're freeing a symlink that has some | |
441 | * blocks allocated to it. Free the | |
442 | * blocks here. We know that we've got | |
443 | * either 1 or 2 extents and that we can | |
444 | * free them all in one bunmapi call. | |
445 | */ | |
446 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
447 | ||
253f4911 CH |
448 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
449 | if (error) | |
36b21dde | 450 | return error; |
36b21dde BF |
451 | |
452 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
453 | xfs_trans_ijoin(tp, ip, 0); | |
454 | ||
19de7351 DC |
455 | /* |
456 | * Lock the inode, fix the size, and join it to the transaction. | |
457 | * Hold it so in the normal path, we still have it locked for | |
458 | * the second transaction. In the error paths we need it | |
459 | * held so the cancel won't rele it, see below. | |
460 | */ | |
461 | size = (int)ip->i_d.di_size; | |
462 | ip->i_d.di_size = 0; | |
463 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
464 | /* | |
465 | * Find the block(s) so we can inval and unmap them. | |
466 | */ | |
467 | done = 0; | |
2c3234d1 | 468 | xfs_defer_init(&dfops, &first_block); |
19de7351 | 469 | nmaps = ARRAY_SIZE(mval); |
f948dd76 | 470 | error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), |
19de7351 DC |
471 | mval, &nmaps, 0); |
472 | if (error) | |
36b21dde | 473 | goto error_trans_cancel; |
19de7351 | 474 | /* |
f948dd76 | 475 | * Invalidate the block(s). No validation is done. |
19de7351 DC |
476 | */ |
477 | for (i = 0; i < nmaps; i++) { | |
478 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
479 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
480 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
481 | if (!bp) { | |
2451337d | 482 | error = -ENOMEM; |
36b21dde | 483 | goto error_bmap_cancel; |
19de7351 DC |
484 | } |
485 | xfs_trans_binval(tp, bp); | |
486 | } | |
487 | /* | |
2c3234d1 | 488 | * Unmap the dead block(s) to the dfops. |
19de7351 | 489 | */ |
ab7bb610 | 490 | error = xfs_bunmapi(tp, ip, 0, size, 0, nmaps, |
2c3234d1 | 491 | &first_block, &dfops, &done); |
36b21dde BF |
492 | if (error) |
493 | goto error_bmap_cancel; | |
19de7351 DC |
494 | ASSERT(done); |
495 | /* | |
496 | * Commit the first transaction. This logs the EFI and the inode. | |
497 | */ | |
2c3234d1 | 498 | error = xfs_defer_finish(&tp, &dfops, ip); |
36b21dde BF |
499 | if (error) |
500 | goto error_bmap_cancel; | |
19de7351 DC |
501 | /* |
502 | * The first xact was committed, so add the inode to the new one. | |
503 | * Mark it dirty so it will be logged and moved forward in the log as | |
504 | * part of every commit. | |
505 | */ | |
506 | xfs_trans_ijoin(tp, ip, 0); | |
507 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
19de7351 DC |
508 | /* |
509 | * Commit the transaction containing extent freeing and EFDs. | |
19de7351 | 510 | */ |
70393313 | 511 | error = xfs_trans_commit(tp); |
19de7351 DC |
512 | if (error) { |
513 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
36b21dde | 514 | goto error_unlock; |
19de7351 | 515 | } |
19de7351 DC |
516 | |
517 | /* | |
518 | * Remove the memory for extent descriptions (just bookkeeping). | |
519 | */ | |
520 | if (ip->i_df.if_bytes) | |
521 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
522 | ASSERT(ip->i_df.if_bytes == 0); | |
19de7351 | 523 | |
36b21dde | 524 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
19de7351 DC |
525 | return 0; |
526 | ||
36b21dde | 527 | error_bmap_cancel: |
2c3234d1 | 528 | xfs_defer_cancel(&dfops); |
36b21dde | 529 | error_trans_cancel: |
4906e215 | 530 | xfs_trans_cancel(tp); |
36b21dde BF |
531 | error_unlock: |
532 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
19de7351 DC |
533 | return error; |
534 | } | |
725eb1eb MT |
535 | |
536 | /* | |
537 | * xfs_inactive_symlink - free a symlink | |
538 | */ | |
539 | int | |
540 | xfs_inactive_symlink( | |
36b21dde | 541 | struct xfs_inode *ip) |
725eb1eb MT |
542 | { |
543 | struct xfs_mount *mp = ip->i_mount; | |
544 | int pathlen; | |
545 | ||
546 | trace_xfs_inactive_symlink(ip); | |
547 | ||
725eb1eb | 548 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 549 | return -EIO; |
725eb1eb | 550 | |
36b21dde BF |
551 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
552 | ||
725eb1eb MT |
553 | /* |
554 | * Zero length symlinks _can_ exist. | |
555 | */ | |
556 | pathlen = (int)ip->i_d.di_size; | |
36b21dde BF |
557 | if (!pathlen) { |
558 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
725eb1eb | 559 | return 0; |
36b21dde | 560 | } |
725eb1eb MT |
561 | |
562 | if (pathlen < 0 || pathlen > MAXPATHLEN) { | |
563 | xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", | |
564 | __func__, (unsigned long long)ip->i_ino, pathlen); | |
36b21dde | 565 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb | 566 | ASSERT(0); |
2451337d | 567 | return -EFSCORRUPTED; |
725eb1eb MT |
568 | } |
569 | ||
570 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
36b21dde | 571 | if (ip->i_df.if_bytes > 0) |
725eb1eb MT |
572 | xfs_idata_realloc(ip, -(ip->i_df.if_bytes), |
573 | XFS_DATA_FORK); | |
36b21dde | 574 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb MT |
575 | ASSERT(ip->i_df.if_bytes == 0); |
576 | return 0; | |
577 | } | |
578 | ||
36b21dde BF |
579 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
580 | ||
725eb1eb | 581 | /* remove the remote symlink */ |
36b21dde | 582 | return xfs_inactive_symlink_rmt(ip); |
725eb1eb | 583 | } |