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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" |
2b9ab5ab | 29 | #include "xfs_dir2.h" |
19de7351 | 30 | #include "xfs_inode.h" |
19de7351 DC |
31 | #include "xfs_ialloc.h" |
32 | #include "xfs_alloc.h" | |
33 | #include "xfs_bmap.h" | |
a4fbe6ab | 34 | #include "xfs_bmap_btree.h" |
68988114 | 35 | #include "xfs_bmap_util.h" |
19de7351 DC |
36 | #include "xfs_error.h" |
37 | #include "xfs_quota.h" | |
19de7351 | 38 | #include "xfs_trans_space.h" |
19de7351 DC |
39 | #include "xfs_trace.h" |
40 | #include "xfs_symlink.h" | |
239880ef | 41 | #include "xfs_trans.h" |
239880ef | 42 | #include "xfs_log.h" |
19de7351 DC |
43 | |
44 | /* ----- Kernel only functions below ----- */ | |
19de7351 DC |
45 | STATIC int |
46 | xfs_readlink_bmap( | |
f948dd76 DC |
47 | struct xfs_inode *ip, |
48 | char *link) | |
19de7351 | 49 | { |
f948dd76 DC |
50 | struct xfs_mount *mp = ip->i_mount; |
51 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; | |
52 | struct xfs_buf *bp; | |
53 | xfs_daddr_t d; | |
54 | char *cur_chunk; | |
55 | int pathlen = ip->i_d.di_size; | |
56 | int nmaps = XFS_SYMLINK_MAPS; | |
57 | int byte_cnt; | |
58 | int n; | |
59 | int error = 0; | |
60 | int fsblocks = 0; | |
61 | int offset; | |
19de7351 | 62 | |
f948dd76 DC |
63 | fsblocks = xfs_symlink_blocks(mp, pathlen); |
64 | error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0); | |
19de7351 DC |
65 | if (error) |
66 | goto out; | |
67 | ||
f948dd76 | 68 | offset = 0; |
19de7351 DC |
69 | for (n = 0; n < nmaps; n++) { |
70 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
71 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
72 | ||
f948dd76 DC |
73 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, |
74 | &xfs_symlink_buf_ops); | |
19de7351 | 75 | if (!bp) |
2451337d | 76 | return -ENOMEM; |
19de7351 DC |
77 | error = bp->b_error; |
78 | if (error) { | |
79 | xfs_buf_ioerror_alert(bp, __func__); | |
80 | xfs_buf_relse(bp); | |
ac75a1f7 DC |
81 | |
82 | /* bad CRC means corrupted metadata */ | |
2451337d DC |
83 | if (error == -EFSBADCRC) |
84 | error = -EFSCORRUPTED; | |
19de7351 DC |
85 | goto out; |
86 | } | |
f948dd76 | 87 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); |
19de7351 DC |
88 | if (pathlen < byte_cnt) |
89 | byte_cnt = pathlen; | |
f948dd76 DC |
90 | |
91 | cur_chunk = bp->b_addr; | |
92 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
bda65ef8 | 93 | if (!xfs_symlink_hdr_ok(ip->i_ino, offset, |
f948dd76 | 94 | byte_cnt, bp)) { |
2451337d | 95 | error = -EFSCORRUPTED; |
f948dd76 DC |
96 | xfs_alert(mp, |
97 | "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)", | |
98 | offset, byte_cnt, ip->i_ino); | |
99 | xfs_buf_relse(bp); | |
100 | goto out; | |
101 | ||
102 | } | |
103 | ||
104 | cur_chunk += sizeof(struct xfs_dsymlink_hdr); | |
105 | } | |
106 | ||
107 | memcpy(link + offset, bp->b_addr, byte_cnt); | |
108 | ||
19de7351 | 109 | pathlen -= byte_cnt; |
f948dd76 | 110 | offset += byte_cnt; |
19de7351 | 111 | |
19de7351 DC |
112 | xfs_buf_relse(bp); |
113 | } | |
f948dd76 | 114 | ASSERT(pathlen == 0); |
19de7351 DC |
115 | |
116 | link[ip->i_d.di_size] = '\0'; | |
117 | error = 0; | |
118 | ||
119 | out: | |
120 | return error; | |
121 | } | |
122 | ||
123 | int | |
124 | xfs_readlink( | |
f948dd76 | 125 | struct xfs_inode *ip, |
19de7351 DC |
126 | char *link) |
127 | { | |
f948dd76 | 128 | struct xfs_mount *mp = ip->i_mount; |
19de7351 DC |
129 | xfs_fsize_t pathlen; |
130 | int error = 0; | |
131 | ||
132 | trace_xfs_readlink(ip); | |
133 | ||
134 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 135 | return -EIO; |
19de7351 DC |
136 | |
137 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
138 | ||
139 | pathlen = ip->i_d.di_size; | |
140 | if (!pathlen) | |
141 | goto out; | |
142 | ||
143 | if (pathlen < 0 || pathlen > MAXPATHLEN) { | |
144 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", | |
145 | __func__, (unsigned long long) ip->i_ino, | |
146 | (long long) pathlen); | |
147 | ASSERT(0); | |
2451337d | 148 | error = -EFSCORRUPTED; |
19de7351 DC |
149 | goto out; |
150 | } | |
151 | ||
152 | ||
153 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
154 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); | |
155 | link[pathlen] = '\0'; | |
156 | } else { | |
157 | error = xfs_readlink_bmap(ip, link); | |
158 | } | |
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; |
f948dd76 | 178 | struct xfs_bmap_free free_list; |
19de7351 | 179 | xfs_fsblock_t first_block; |
58c90473 | 180 | bool unlock_dp_on_error = false; |
19de7351 DC |
181 | uint cancel_flags; |
182 | int committed; | |
183 | xfs_fileoff_t first_fsb; | |
184 | xfs_filblks_t fs_blocks; | |
185 | int nmaps; | |
f948dd76 | 186 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; |
19de7351 DC |
187 | xfs_daddr_t d; |
188 | const char *cur_chunk; | |
189 | int byte_cnt; | |
190 | int n; | |
191 | xfs_buf_t *bp; | |
192 | prid_t prid; | |
113a5683 CS |
193 | struct xfs_dquot *udqp = NULL; |
194 | struct xfs_dquot *gdqp = NULL; | |
92f8ff73 | 195 | struct xfs_dquot *pdqp = NULL; |
19de7351 DC |
196 | uint resblks; |
197 | ||
198 | *ipp = NULL; | |
19de7351 DC |
199 | |
200 | trace_xfs_symlink(dp, link_name); | |
201 | ||
202 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 203 | return -EIO; |
19de7351 DC |
204 | |
205 | /* | |
206 | * Check component lengths of the target path name. | |
207 | */ | |
208 | pathlen = strlen(target_path); | |
209 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
2451337d | 210 | return -ENAMETOOLONG; |
19de7351 DC |
211 | |
212 | udqp = gdqp = NULL; | |
163467d3 | 213 | prid = xfs_get_initial_prid(dp); |
19de7351 DC |
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 | 223 | if (error) |
58c90473 | 224 | return error; |
19de7351 DC |
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); |
2451337d | 238 | if (error == -ENOSPC && fs_blocks == 0) { |
19de7351 | 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; | |
58c90473 | 244 | goto out_trans_cancel; |
19de7351 DC |
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) { | |
2451337d | 254 | error = -EPERM; |
58c90473 | 255 | goto out_trans_cancel; |
19de7351 DC |
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 | 263 | if (error) |
58c90473 | 264 | goto out_trans_cancel; |
19de7351 DC |
265 | |
266 | /* | |
267 | * Check for ability to enter directory entry, if no space reserved. | |
268 | */ | |
94f3cad5 ES |
269 | if (!resblks) { |
270 | error = xfs_dir_canenter(tp, dp, link_name); | |
271 | if (error) | |
58c90473 | 272 | goto out_trans_cancel; |
94f3cad5 | 273 | } |
19de7351 DC |
274 | /* |
275 | * Initialize the bmap freelist prior to calling either | |
276 | * bmapi or the directory create code. | |
277 | */ | |
278 | xfs_bmap_init(&free_list, &first_block); | |
279 | ||
280 | /* | |
281 | * Allocate an inode for the symlink. | |
282 | */ | |
283 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, | |
284 | prid, resblks > 0, &ip, NULL); | |
58c90473 DC |
285 | if (error) |
286 | goto out_trans_cancel; | |
19de7351 DC |
287 | |
288 | /* | |
58c90473 DC |
289 | * Now we join the directory inode to the transaction. We do not do it |
290 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
291 | * (and release all the locks). An error from here on will result in | |
292 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
19de7351 DC |
293 | * error path. |
294 | */ | |
295 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); | |
296 | unlock_dp_on_error = false; | |
297 | ||
298 | /* | |
299 | * Also attach the dquot(s) to it, if applicable. | |
300 | */ | |
92f8ff73 | 301 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); |
19de7351 DC |
302 | |
303 | if (resblks) | |
304 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
305 | /* | |
306 | * If the symlink will fit into the inode, write it inline. | |
307 | */ | |
308 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
309 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
310 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
311 | ip->i_d.di_size = pathlen; | |
312 | ||
313 | /* | |
314 | * The inode was initially created in extent format. | |
315 | */ | |
316 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
317 | ip->i_df.if_flags |= XFS_IFINLINE; | |
318 | ||
319 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
320 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
321 | ||
322 | } else { | |
f948dd76 DC |
323 | int offset; |
324 | ||
19de7351 DC |
325 | first_fsb = 0; |
326 | nmaps = XFS_SYMLINK_MAPS; | |
327 | ||
328 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, | |
329 | XFS_BMAPI_METADATA, &first_block, resblks, | |
330 | mval, &nmaps, &free_list); | |
331 | if (error) | |
58c90473 | 332 | goto out_bmap_cancel; |
19de7351 DC |
333 | |
334 | if (resblks) | |
335 | resblks -= fs_blocks; | |
336 | ip->i_d.di_size = pathlen; | |
337 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
338 | ||
339 | cur_chunk = target_path; | |
f948dd76 | 340 | offset = 0; |
19de7351 | 341 | for (n = 0; n < nmaps; n++) { |
321a9583 | 342 | char *buf; |
f948dd76 | 343 | |
19de7351 DC |
344 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
345 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
346 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
347 | BTOBB(byte_cnt), 0); | |
348 | if (!bp) { | |
2451337d | 349 | error = -ENOMEM; |
58c90473 | 350 | goto out_bmap_cancel; |
19de7351 | 351 | } |
f948dd76 DC |
352 | bp->b_ops = &xfs_symlink_buf_ops; |
353 | ||
354 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); | |
321a9583 | 355 | byte_cnt = min(byte_cnt, pathlen); |
19de7351 | 356 | |
f948dd76 DC |
357 | buf = bp->b_addr; |
358 | buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, | |
359 | byte_cnt, bp); | |
360 | ||
361 | memcpy(buf, cur_chunk, byte_cnt); | |
362 | ||
19de7351 | 363 | cur_chunk += byte_cnt; |
f948dd76 DC |
364 | pathlen -= byte_cnt; |
365 | offset += byte_cnt; | |
19de7351 | 366 | |
daf7b799 | 367 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF); |
f948dd76 DC |
368 | xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - |
369 | (char *)bp->b_addr); | |
19de7351 | 370 | } |
321a9583 | 371 | ASSERT(pathlen == 0); |
19de7351 DC |
372 | } |
373 | ||
374 | /* | |
375 | * Create the directory entry for the symlink. | |
376 | */ | |
377 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, | |
378 | &first_block, &free_list, resblks); | |
379 | if (error) | |
58c90473 | 380 | goto out_bmap_cancel; |
19de7351 DC |
381 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
382 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
383 | ||
384 | /* | |
385 | * If this is a synchronous mount, make sure that the | |
386 | * symlink transaction goes to disk before returning to | |
387 | * the user. | |
388 | */ | |
389 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
390 | xfs_trans_set_sync(tp); | |
391 | } | |
392 | ||
393 | error = xfs_bmap_finish(&tp, &free_list, &committed); | |
58c90473 DC |
394 | if (error) |
395 | goto out_bmap_cancel; | |
396 | ||
19de7351 | 397 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
58c90473 DC |
398 | if (error) |
399 | goto out_release_inode; | |
400 | ||
19de7351 DC |
401 | xfs_qm_dqrele(udqp); |
402 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 403 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
404 | |
405 | *ipp = ip; | |
406 | return 0; | |
407 | ||
58c90473 | 408 | out_bmap_cancel: |
19de7351 DC |
409 | xfs_bmap_cancel(&free_list); |
410 | cancel_flags |= XFS_TRANS_ABORT; | |
58c90473 | 411 | out_trans_cancel: |
19de7351 | 412 | xfs_trans_cancel(tp, cancel_flags); |
58c90473 DC |
413 | out_release_inode: |
414 | /* | |
415 | * Wait until after the current transaction is aborted to finish the | |
416 | * setup of the inode and release the inode. This prevents recursive | |
417 | * transactions and deadlocks from xfs_inactive. | |
418 | */ | |
419 | if (ip) { | |
420 | xfs_finish_inode_setup(ip); | |
421 | IRELE(ip); | |
422 | } | |
423 | ||
19de7351 DC |
424 | xfs_qm_dqrele(udqp); |
425 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 426 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
427 | |
428 | if (unlock_dp_on_error) | |
429 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
19de7351 DC |
430 | return error; |
431 | } | |
432 | ||
433 | /* | |
434 | * Free a symlink that has blocks associated with it. | |
435 | */ | |
725eb1eb | 436 | STATIC int |
19de7351 | 437 | xfs_inactive_symlink_rmt( |
36b21dde | 438 | struct xfs_inode *ip) |
19de7351 DC |
439 | { |
440 | xfs_buf_t *bp; | |
441 | int committed; | |
442 | int done; | |
443 | int error; | |
444 | xfs_fsblock_t first_block; | |
445 | xfs_bmap_free_t free_list; | |
446 | int i; | |
447 | xfs_mount_t *mp; | |
448 | xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; | |
449 | int nmaps; | |
19de7351 DC |
450 | int size; |
451 | xfs_trans_t *tp; | |
452 | ||
19de7351 | 453 | mp = ip->i_mount; |
725eb1eb | 454 | ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS); |
19de7351 DC |
455 | /* |
456 | * We're freeing a symlink that has some | |
457 | * blocks allocated to it. Free the | |
458 | * blocks here. We know that we've got | |
459 | * either 1 or 2 extents and that we can | |
460 | * free them all in one bunmapi call. | |
461 | */ | |
462 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
463 | ||
36b21dde BF |
464 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
465 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); | |
466 | if (error) { | |
467 | xfs_trans_cancel(tp, 0); | |
468 | return error; | |
469 | } | |
470 | ||
471 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
472 | xfs_trans_ijoin(tp, ip, 0); | |
473 | ||
19de7351 DC |
474 | /* |
475 | * Lock the inode, fix the size, and join it to the transaction. | |
476 | * Hold it so in the normal path, we still have it locked for | |
477 | * the second transaction. In the error paths we need it | |
478 | * held so the cancel won't rele it, see below. | |
479 | */ | |
480 | size = (int)ip->i_d.di_size; | |
481 | ip->i_d.di_size = 0; | |
482 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
483 | /* | |
484 | * Find the block(s) so we can inval and unmap them. | |
485 | */ | |
486 | done = 0; | |
487 | xfs_bmap_init(&free_list, &first_block); | |
488 | nmaps = ARRAY_SIZE(mval); | |
f948dd76 | 489 | error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), |
19de7351 DC |
490 | mval, &nmaps, 0); |
491 | if (error) | |
36b21dde | 492 | goto error_trans_cancel; |
19de7351 | 493 | /* |
f948dd76 | 494 | * Invalidate the block(s). No validation is done. |
19de7351 DC |
495 | */ |
496 | for (i = 0; i < nmaps; i++) { | |
497 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
498 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
499 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
500 | if (!bp) { | |
2451337d | 501 | error = -ENOMEM; |
36b21dde | 502 | goto error_bmap_cancel; |
19de7351 DC |
503 | } |
504 | xfs_trans_binval(tp, bp); | |
505 | } | |
506 | /* | |
507 | * Unmap the dead block(s) to the free_list. | |
508 | */ | |
36b21dde BF |
509 | error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, |
510 | &first_block, &free_list, &done); | |
511 | if (error) | |
512 | goto error_bmap_cancel; | |
19de7351 DC |
513 | ASSERT(done); |
514 | /* | |
515 | * Commit the first transaction. This logs the EFI and the inode. | |
516 | */ | |
36b21dde BF |
517 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
518 | if (error) | |
519 | goto error_bmap_cancel; | |
19de7351 DC |
520 | /* |
521 | * The transaction must have been committed, since there were | |
522 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
523 | * The new tp has the extent freeing and EFDs. | |
524 | */ | |
525 | ASSERT(committed); | |
526 | /* | |
527 | * The first xact was committed, so add the inode to the new one. | |
528 | * Mark it dirty so it will be logged and moved forward in the log as | |
529 | * part of every commit. | |
530 | */ | |
531 | xfs_trans_ijoin(tp, ip, 0); | |
532 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
19de7351 DC |
533 | /* |
534 | * Commit the transaction containing extent freeing and EFDs. | |
19de7351 | 535 | */ |
36b21dde | 536 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
19de7351 DC |
537 | if (error) { |
538 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
36b21dde | 539 | goto error_unlock; |
19de7351 | 540 | } |
19de7351 DC |
541 | |
542 | /* | |
543 | * Remove the memory for extent descriptions (just bookkeeping). | |
544 | */ | |
545 | if (ip->i_df.if_bytes) | |
546 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
547 | ASSERT(ip->i_df.if_bytes == 0); | |
19de7351 | 548 | |
36b21dde | 549 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
19de7351 DC |
550 | return 0; |
551 | ||
36b21dde | 552 | error_bmap_cancel: |
19de7351 | 553 | xfs_bmap_cancel(&free_list); |
36b21dde BF |
554 | error_trans_cancel: |
555 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
556 | error_unlock: | |
557 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
19de7351 DC |
558 | return error; |
559 | } | |
725eb1eb MT |
560 | |
561 | /* | |
562 | * xfs_inactive_symlink - free a symlink | |
563 | */ | |
564 | int | |
565 | xfs_inactive_symlink( | |
36b21dde | 566 | struct xfs_inode *ip) |
725eb1eb MT |
567 | { |
568 | struct xfs_mount *mp = ip->i_mount; | |
569 | int pathlen; | |
570 | ||
571 | trace_xfs_inactive_symlink(ip); | |
572 | ||
725eb1eb | 573 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 574 | return -EIO; |
725eb1eb | 575 | |
36b21dde BF |
576 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
577 | ||
725eb1eb MT |
578 | /* |
579 | * Zero length symlinks _can_ exist. | |
580 | */ | |
581 | pathlen = (int)ip->i_d.di_size; | |
36b21dde BF |
582 | if (!pathlen) { |
583 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
725eb1eb | 584 | return 0; |
36b21dde | 585 | } |
725eb1eb MT |
586 | |
587 | if (pathlen < 0 || pathlen > MAXPATHLEN) { | |
588 | xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", | |
589 | __func__, (unsigned long long)ip->i_ino, pathlen); | |
36b21dde | 590 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb | 591 | ASSERT(0); |
2451337d | 592 | return -EFSCORRUPTED; |
725eb1eb MT |
593 | } |
594 | ||
595 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
36b21dde | 596 | if (ip->i_df.if_bytes > 0) |
725eb1eb MT |
597 | xfs_idata_realloc(ip, -(ip->i_df.if_bytes), |
598 | XFS_DATA_FORK); | |
36b21dde | 599 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb MT |
600 | ASSERT(ip->i_df.if_bytes == 0); |
601 | return 0; | |
602 | } | |
603 | ||
36b21dde BF |
604 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
605 | ||
725eb1eb | 606 | /* remove the remote symlink */ |
36b21dde | 607 | return xfs_inactive_symlink_rmt(ip); |
725eb1eb | 608 | } |