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 DC |
26 | #include "xfs_sb.h" |
27 | #include "xfs_ag.h" | |
19de7351 | 28 | #include "xfs_mount.h" |
57062787 | 29 | #include "xfs_da_format.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" |
a4fbe6ab | 44 | #include "xfs_dinode.h" |
19de7351 DC |
45 | |
46 | /* ----- Kernel only functions below ----- */ | |
19de7351 DC |
47 | STATIC int |
48 | xfs_readlink_bmap( | |
f948dd76 DC |
49 | struct xfs_inode *ip, |
50 | char *link) | |
19de7351 | 51 | { |
f948dd76 DC |
52 | struct xfs_mount *mp = ip->i_mount; |
53 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; | |
54 | struct xfs_buf *bp; | |
55 | xfs_daddr_t d; | |
56 | char *cur_chunk; | |
57 | int pathlen = ip->i_d.di_size; | |
58 | int nmaps = XFS_SYMLINK_MAPS; | |
59 | int byte_cnt; | |
60 | int n; | |
61 | int error = 0; | |
62 | int fsblocks = 0; | |
63 | int offset; | |
19de7351 | 64 | |
f948dd76 DC |
65 | fsblocks = xfs_symlink_blocks(mp, pathlen); |
66 | error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0); | |
19de7351 DC |
67 | if (error) |
68 | goto out; | |
69 | ||
f948dd76 | 70 | offset = 0; |
19de7351 DC |
71 | for (n = 0; n < nmaps; n++) { |
72 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
73 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
74 | ||
f948dd76 DC |
75 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, |
76 | &xfs_symlink_buf_ops); | |
19de7351 DC |
77 | if (!bp) |
78 | return XFS_ERROR(ENOMEM); | |
79 | error = bp->b_error; | |
80 | if (error) { | |
81 | xfs_buf_ioerror_alert(bp, __func__); | |
82 | xfs_buf_relse(bp); | |
ac75a1f7 DC |
83 | |
84 | /* bad CRC means corrupted metadata */ | |
85 | if (error == EFSBADCRC) | |
86 | error = EFSCORRUPTED; | |
19de7351 DC |
87 | goto out; |
88 | } | |
f948dd76 | 89 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); |
19de7351 DC |
90 | if (pathlen < byte_cnt) |
91 | byte_cnt = pathlen; | |
f948dd76 DC |
92 | |
93 | cur_chunk = bp->b_addr; | |
94 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
bda65ef8 | 95 | if (!xfs_symlink_hdr_ok(ip->i_ino, offset, |
f948dd76 DC |
96 | byte_cnt, bp)) { |
97 | error = EFSCORRUPTED; | |
98 | xfs_alert(mp, | |
99 | "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)", | |
100 | offset, byte_cnt, ip->i_ino); | |
101 | xfs_buf_relse(bp); | |
102 | goto out; | |
103 | ||
104 | } | |
105 | ||
106 | cur_chunk += sizeof(struct xfs_dsymlink_hdr); | |
107 | } | |
108 | ||
109 | memcpy(link + offset, bp->b_addr, byte_cnt); | |
110 | ||
19de7351 | 111 | pathlen -= byte_cnt; |
f948dd76 | 112 | offset += byte_cnt; |
19de7351 | 113 | |
19de7351 DC |
114 | xfs_buf_relse(bp); |
115 | } | |
f948dd76 | 116 | ASSERT(pathlen == 0); |
19de7351 DC |
117 | |
118 | link[ip->i_d.di_size] = '\0'; | |
119 | error = 0; | |
120 | ||
121 | out: | |
122 | return error; | |
123 | } | |
124 | ||
125 | int | |
126 | xfs_readlink( | |
f948dd76 | 127 | struct xfs_inode *ip, |
19de7351 DC |
128 | char *link) |
129 | { | |
f948dd76 | 130 | struct xfs_mount *mp = ip->i_mount; |
19de7351 DC |
131 | xfs_fsize_t pathlen; |
132 | int error = 0; | |
133 | ||
134 | trace_xfs_readlink(ip); | |
135 | ||
136 | if (XFS_FORCED_SHUTDOWN(mp)) | |
137 | return XFS_ERROR(EIO); | |
138 | ||
139 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
140 | ||
141 | pathlen = ip->i_d.di_size; | |
142 | if (!pathlen) | |
143 | goto out; | |
144 | ||
145 | if (pathlen < 0 || pathlen > MAXPATHLEN) { | |
146 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", | |
147 | __func__, (unsigned long long) ip->i_ino, | |
148 | (long long) pathlen); | |
149 | ASSERT(0); | |
150 | error = XFS_ERROR(EFSCORRUPTED); | |
151 | goto out; | |
152 | } | |
153 | ||
154 | ||
155 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
156 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); | |
157 | link[pathlen] = '\0'; | |
158 | } else { | |
159 | error = xfs_readlink_bmap(ip, link); | |
160 | } | |
161 | ||
162 | out: | |
163 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
164 | return error; | |
165 | } | |
166 | ||
167 | int | |
168 | xfs_symlink( | |
f948dd76 | 169 | struct xfs_inode *dp, |
19de7351 DC |
170 | struct xfs_name *link_name, |
171 | const char *target_path, | |
172 | umode_t mode, | |
f948dd76 | 173 | struct xfs_inode **ipp) |
19de7351 | 174 | { |
f948dd76 DC |
175 | struct xfs_mount *mp = dp->i_mount; |
176 | struct xfs_trans *tp = NULL; | |
177 | struct xfs_inode *ip = NULL; | |
178 | int error = 0; | |
19de7351 | 179 | int pathlen; |
f948dd76 | 180 | struct xfs_bmap_free free_list; |
19de7351 | 181 | xfs_fsblock_t first_block; |
f948dd76 | 182 | bool unlock_dp_on_error = false; |
19de7351 DC |
183 | uint cancel_flags; |
184 | int committed; | |
185 | xfs_fileoff_t first_fsb; | |
186 | xfs_filblks_t fs_blocks; | |
187 | int nmaps; | |
f948dd76 | 188 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; |
19de7351 DC |
189 | xfs_daddr_t d; |
190 | const char *cur_chunk; | |
191 | int byte_cnt; | |
192 | int n; | |
193 | xfs_buf_t *bp; | |
194 | prid_t prid; | |
113a5683 CS |
195 | struct xfs_dquot *udqp = NULL; |
196 | struct xfs_dquot *gdqp = NULL; | |
92f8ff73 | 197 | struct xfs_dquot *pdqp = NULL; |
19de7351 DC |
198 | uint resblks; |
199 | ||
200 | *ipp = NULL; | |
19de7351 DC |
201 | |
202 | trace_xfs_symlink(dp, link_name); | |
203 | ||
204 | if (XFS_FORCED_SHUTDOWN(mp)) | |
205 | return XFS_ERROR(EIO); | |
206 | ||
207 | /* | |
208 | * Check component lengths of the target path name. | |
209 | */ | |
210 | pathlen = strlen(target_path); | |
211 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
212 | return XFS_ERROR(ENAMETOOLONG); | |
213 | ||
214 | udqp = gdqp = NULL; | |
163467d3 | 215 | prid = xfs_get_initial_prid(dp); |
19de7351 DC |
216 | |
217 | /* | |
218 | * Make sure that we have allocated dquot(s) on disk. | |
219 | */ | |
7aab1b28 DE |
220 | error = xfs_qm_vop_dqalloc(dp, |
221 | xfs_kuid_to_uid(current_fsuid()), | |
222 | xfs_kgid_to_gid(current_fsgid()), prid, | |
223 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, | |
224 | &udqp, &gdqp, &pdqp); | |
19de7351 DC |
225 | if (error) |
226 | goto std_return; | |
227 | ||
228 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
229 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
230 | /* | |
231 | * The symlink will fit into the inode data fork? | |
232 | * There can't be any attributes so we get the whole variable part. | |
233 | */ | |
234 | if (pathlen <= XFS_LITINO(mp, dp->i_d.di_version)) | |
235 | fs_blocks = 0; | |
236 | else | |
321a9583 | 237 | fs_blocks = xfs_symlink_blocks(mp, pathlen); |
19de7351 | 238 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
3d3c8b52 | 239 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_symlink, resblks, 0); |
19de7351 DC |
240 | if (error == ENOSPC && fs_blocks == 0) { |
241 | resblks = 0; | |
3d3c8b52 | 242 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_symlink, 0, 0); |
19de7351 DC |
243 | } |
244 | if (error) { | |
245 | cancel_flags = 0; | |
246 | goto error_return; | |
247 | } | |
248 | ||
249 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); | |
250 | unlock_dp_on_error = true; | |
251 | ||
252 | /* | |
253 | * Check whether the directory allows new symlinks or not. | |
254 | */ | |
255 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
256 | error = XFS_ERROR(EPERM); | |
257 | goto error_return; | |
258 | } | |
259 | ||
260 | /* | |
261 | * Reserve disk quota : blocks and inode. | |
262 | */ | |
92f8ff73 CS |
263 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, |
264 | pdqp, resblks, 1, 0); | |
19de7351 DC |
265 | if (error) |
266 | goto error_return; | |
267 | ||
268 | /* | |
269 | * Check for ability to enter directory entry, if no space reserved. | |
270 | */ | |
271 | error = xfs_dir_canenter(tp, dp, link_name, resblks); | |
272 | if (error) | |
273 | goto error_return; | |
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); | |
285 | if (error) { | |
286 | if (error == ENOSPC) | |
287 | goto error_return; | |
288 | goto error1; | |
289 | } | |
290 | ||
291 | /* | |
292 | * An error after we've joined dp to the transaction will result in the | |
293 | * transaction cancel unlocking dp so don't do it explicitly in the | |
294 | * error path. | |
295 | */ | |
296 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); | |
297 | unlock_dp_on_error = false; | |
298 | ||
299 | /* | |
300 | * Also attach the dquot(s) to it, if applicable. | |
301 | */ | |
92f8ff73 | 302 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); |
19de7351 DC |
303 | |
304 | if (resblks) | |
305 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
306 | /* | |
307 | * If the symlink will fit into the inode, write it inline. | |
308 | */ | |
309 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
310 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
311 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
312 | ip->i_d.di_size = pathlen; | |
313 | ||
314 | /* | |
315 | * The inode was initially created in extent format. | |
316 | */ | |
317 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
318 | ip->i_df.if_flags |= XFS_IFINLINE; | |
319 | ||
320 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
321 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
322 | ||
323 | } else { | |
f948dd76 DC |
324 | int offset; |
325 | ||
19de7351 DC |
326 | first_fsb = 0; |
327 | nmaps = XFS_SYMLINK_MAPS; | |
328 | ||
329 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, | |
330 | XFS_BMAPI_METADATA, &first_block, resblks, | |
331 | mval, &nmaps, &free_list); | |
332 | if (error) | |
333 | goto error2; | |
334 | ||
335 | if (resblks) | |
336 | resblks -= fs_blocks; | |
337 | ip->i_d.di_size = pathlen; | |
338 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
339 | ||
340 | cur_chunk = target_path; | |
f948dd76 | 341 | offset = 0; |
19de7351 | 342 | for (n = 0; n < nmaps; n++) { |
321a9583 | 343 | char *buf; |
f948dd76 | 344 | |
19de7351 DC |
345 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
346 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
347 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
348 | BTOBB(byte_cnt), 0); | |
349 | if (!bp) { | |
350 | error = ENOMEM; | |
351 | goto error2; | |
352 | } | |
f948dd76 DC |
353 | bp->b_ops = &xfs_symlink_buf_ops; |
354 | ||
355 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); | |
321a9583 | 356 | byte_cnt = min(byte_cnt, pathlen); |
19de7351 | 357 | |
f948dd76 DC |
358 | buf = bp->b_addr; |
359 | buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, | |
360 | byte_cnt, bp); | |
361 | ||
362 | memcpy(buf, cur_chunk, byte_cnt); | |
363 | ||
19de7351 | 364 | cur_chunk += byte_cnt; |
f948dd76 DC |
365 | pathlen -= byte_cnt; |
366 | offset += byte_cnt; | |
19de7351 | 367 | |
daf7b799 | 368 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF); |
f948dd76 DC |
369 | xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - |
370 | (char *)bp->b_addr); | |
19de7351 | 371 | } |
321a9583 | 372 | ASSERT(pathlen == 0); |
19de7351 DC |
373 | } |
374 | ||
375 | /* | |
376 | * Create the directory entry for the symlink. | |
377 | */ | |
378 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, | |
379 | &first_block, &free_list, resblks); | |
380 | if (error) | |
381 | goto error2; | |
382 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
383 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
384 | ||
385 | /* | |
386 | * If this is a synchronous mount, make sure that the | |
387 | * symlink transaction goes to disk before returning to | |
388 | * the user. | |
389 | */ | |
390 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
391 | xfs_trans_set_sync(tp); | |
392 | } | |
393 | ||
394 | error = xfs_bmap_finish(&tp, &free_list, &committed); | |
395 | if (error) { | |
396 | goto error2; | |
397 | } | |
398 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
399 | xfs_qm_dqrele(udqp); | |
400 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 401 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
402 | |
403 | *ipp = ip; | |
404 | return 0; | |
405 | ||
406 | error2: | |
407 | IRELE(ip); | |
408 | error1: | |
409 | xfs_bmap_cancel(&free_list); | |
410 | cancel_flags |= XFS_TRANS_ABORT; | |
411 | error_return: | |
412 | xfs_trans_cancel(tp, cancel_flags); | |
413 | xfs_qm_dqrele(udqp); | |
414 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 415 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
416 | |
417 | if (unlock_dp_on_error) | |
418 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
419 | std_return: | |
420 | return error; | |
421 | } | |
422 | ||
423 | /* | |
424 | * Free a symlink that has blocks associated with it. | |
425 | */ | |
725eb1eb | 426 | STATIC int |
19de7351 | 427 | xfs_inactive_symlink_rmt( |
36b21dde | 428 | struct xfs_inode *ip) |
19de7351 DC |
429 | { |
430 | xfs_buf_t *bp; | |
431 | int committed; | |
432 | int done; | |
433 | int error; | |
434 | xfs_fsblock_t first_block; | |
435 | xfs_bmap_free_t free_list; | |
436 | int i; | |
437 | xfs_mount_t *mp; | |
438 | xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; | |
439 | int nmaps; | |
19de7351 DC |
440 | int size; |
441 | xfs_trans_t *tp; | |
442 | ||
19de7351 | 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 | ||
36b21dde BF |
454 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
455 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); | |
456 | if (error) { | |
457 | xfs_trans_cancel(tp, 0); | |
458 | return error; | |
459 | } | |
460 | ||
461 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
462 | xfs_trans_ijoin(tp, ip, 0); | |
463 | ||
19de7351 DC |
464 | /* |
465 | * Lock the inode, fix the size, and join it to the transaction. | |
466 | * Hold it so in the normal path, we still have it locked for | |
467 | * the second transaction. In the error paths we need it | |
468 | * held so the cancel won't rele it, see below. | |
469 | */ | |
470 | size = (int)ip->i_d.di_size; | |
471 | ip->i_d.di_size = 0; | |
472 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
473 | /* | |
474 | * Find the block(s) so we can inval and unmap them. | |
475 | */ | |
476 | done = 0; | |
477 | xfs_bmap_init(&free_list, &first_block); | |
478 | nmaps = ARRAY_SIZE(mval); | |
f948dd76 | 479 | error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), |
19de7351 DC |
480 | mval, &nmaps, 0); |
481 | if (error) | |
36b21dde | 482 | goto error_trans_cancel; |
19de7351 | 483 | /* |
f948dd76 | 484 | * Invalidate the block(s). No validation is done. |
19de7351 DC |
485 | */ |
486 | for (i = 0; i < nmaps; i++) { | |
487 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
488 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
489 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
490 | if (!bp) { | |
491 | error = ENOMEM; | |
36b21dde | 492 | goto error_bmap_cancel; |
19de7351 DC |
493 | } |
494 | xfs_trans_binval(tp, bp); | |
495 | } | |
496 | /* | |
497 | * Unmap the dead block(s) to the free_list. | |
498 | */ | |
36b21dde BF |
499 | error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, |
500 | &first_block, &free_list, &done); | |
501 | if (error) | |
502 | goto error_bmap_cancel; | |
19de7351 DC |
503 | ASSERT(done); |
504 | /* | |
505 | * Commit the first transaction. This logs the EFI and the inode. | |
506 | */ | |
36b21dde BF |
507 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
508 | if (error) | |
509 | goto error_bmap_cancel; | |
19de7351 DC |
510 | /* |
511 | * The transaction must have been committed, since there were | |
512 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
513 | * The new tp has the extent freeing and EFDs. | |
514 | */ | |
515 | ASSERT(committed); | |
516 | /* | |
517 | * The first xact was committed, so add the inode to the new one. | |
518 | * Mark it dirty so it will be logged and moved forward in the log as | |
519 | * part of every commit. | |
520 | */ | |
521 | xfs_trans_ijoin(tp, ip, 0); | |
522 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
19de7351 DC |
523 | /* |
524 | * Commit the transaction containing extent freeing and EFDs. | |
19de7351 | 525 | */ |
36b21dde | 526 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
19de7351 DC |
527 | if (error) { |
528 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
36b21dde | 529 | goto error_unlock; |
19de7351 | 530 | } |
19de7351 DC |
531 | |
532 | /* | |
533 | * Remove the memory for extent descriptions (just bookkeeping). | |
534 | */ | |
535 | if (ip->i_df.if_bytes) | |
536 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
537 | ASSERT(ip->i_df.if_bytes == 0); | |
19de7351 | 538 | |
36b21dde | 539 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
19de7351 DC |
540 | return 0; |
541 | ||
36b21dde | 542 | error_bmap_cancel: |
19de7351 | 543 | xfs_bmap_cancel(&free_list); |
36b21dde BF |
544 | error_trans_cancel: |
545 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
546 | error_unlock: | |
547 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
19de7351 DC |
548 | return error; |
549 | } | |
725eb1eb MT |
550 | |
551 | /* | |
552 | * xfs_inactive_symlink - free a symlink | |
553 | */ | |
554 | int | |
555 | xfs_inactive_symlink( | |
36b21dde | 556 | struct xfs_inode *ip) |
725eb1eb MT |
557 | { |
558 | struct xfs_mount *mp = ip->i_mount; | |
559 | int pathlen; | |
560 | ||
561 | trace_xfs_inactive_symlink(ip); | |
562 | ||
725eb1eb MT |
563 | if (XFS_FORCED_SHUTDOWN(mp)) |
564 | return XFS_ERROR(EIO); | |
565 | ||
36b21dde BF |
566 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
567 | ||
725eb1eb MT |
568 | /* |
569 | * Zero length symlinks _can_ exist. | |
570 | */ | |
571 | pathlen = (int)ip->i_d.di_size; | |
36b21dde BF |
572 | if (!pathlen) { |
573 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
725eb1eb | 574 | return 0; |
36b21dde | 575 | } |
725eb1eb MT |
576 | |
577 | if (pathlen < 0 || pathlen > MAXPATHLEN) { | |
578 | xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", | |
579 | __func__, (unsigned long long)ip->i_ino, pathlen); | |
36b21dde | 580 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb MT |
581 | ASSERT(0); |
582 | return XFS_ERROR(EFSCORRUPTED); | |
583 | } | |
584 | ||
585 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
36b21dde | 586 | if (ip->i_df.if_bytes > 0) |
725eb1eb MT |
587 | xfs_idata_realloc(ip, -(ip->i_df.if_bytes), |
588 | XFS_DATA_FORK); | |
36b21dde | 589 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb MT |
590 | ASSERT(ip->i_df.if_bytes == 0); |
591 | return 0; | |
592 | } | |
593 | ||
36b21dde BF |
594 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
595 | ||
725eb1eb | 596 | /* remove the remote symlink */ |
36b21dde | 597 | return xfs_inactive_symlink_rmt(ip); |
725eb1eb | 598 | } |