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" |
d6cf1305 | 30 | #include "xfs_da_btree.h" |
2b9ab5ab | 31 | #include "xfs_dir2.h" |
19de7351 | 32 | #include "xfs_inode.h" |
19de7351 DC |
33 | #include "xfs_ialloc.h" |
34 | #include "xfs_alloc.h" | |
35 | #include "xfs_bmap.h" | |
a4fbe6ab | 36 | #include "xfs_bmap_btree.h" |
68988114 | 37 | #include "xfs_bmap_util.h" |
19de7351 DC |
38 | #include "xfs_error.h" |
39 | #include "xfs_quota.h" | |
19de7351 | 40 | #include "xfs_trans_space.h" |
19de7351 DC |
41 | #include "xfs_trace.h" |
42 | #include "xfs_symlink.h" | |
239880ef | 43 | #include "xfs_trans.h" |
239880ef | 44 | #include "xfs_log.h" |
a4fbe6ab | 45 | #include "xfs_dinode.h" |
19de7351 DC |
46 | |
47 | /* ----- Kernel only functions below ----- */ | |
19de7351 DC |
48 | STATIC int |
49 | xfs_readlink_bmap( | |
f948dd76 DC |
50 | struct xfs_inode *ip, |
51 | char *link) | |
19de7351 | 52 | { |
f948dd76 DC |
53 | struct xfs_mount *mp = ip->i_mount; |
54 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; | |
55 | struct xfs_buf *bp; | |
56 | xfs_daddr_t d; | |
57 | char *cur_chunk; | |
58 | int pathlen = ip->i_d.di_size; | |
59 | int nmaps = XFS_SYMLINK_MAPS; | |
60 | int byte_cnt; | |
61 | int n; | |
62 | int error = 0; | |
63 | int fsblocks = 0; | |
64 | int offset; | |
19de7351 | 65 | |
f948dd76 DC |
66 | fsblocks = xfs_symlink_blocks(mp, pathlen); |
67 | error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0); | |
19de7351 DC |
68 | if (error) |
69 | goto out; | |
70 | ||
f948dd76 | 71 | offset = 0; |
19de7351 DC |
72 | for (n = 0; n < nmaps; n++) { |
73 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
74 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
75 | ||
f948dd76 DC |
76 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, |
77 | &xfs_symlink_buf_ops); | |
19de7351 | 78 | if (!bp) |
2451337d | 79 | return -ENOMEM; |
19de7351 DC |
80 | error = bp->b_error; |
81 | if (error) { | |
82 | xfs_buf_ioerror_alert(bp, __func__); | |
83 | xfs_buf_relse(bp); | |
ac75a1f7 DC |
84 | |
85 | /* bad CRC means corrupted metadata */ | |
2451337d DC |
86 | if (error == -EFSBADCRC) |
87 | error = -EFSCORRUPTED; | |
19de7351 DC |
88 | goto out; |
89 | } | |
f948dd76 | 90 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); |
19de7351 DC |
91 | if (pathlen < byte_cnt) |
92 | byte_cnt = pathlen; | |
f948dd76 DC |
93 | |
94 | cur_chunk = bp->b_addr; | |
95 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
bda65ef8 | 96 | if (!xfs_symlink_hdr_ok(ip->i_ino, offset, |
f948dd76 | 97 | byte_cnt, bp)) { |
2451337d | 98 | error = -EFSCORRUPTED; |
f948dd76 DC |
99 | xfs_alert(mp, |
100 | "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)", | |
101 | offset, byte_cnt, ip->i_ino); | |
102 | xfs_buf_relse(bp); | |
103 | goto out; | |
104 | ||
105 | } | |
106 | ||
107 | cur_chunk += sizeof(struct xfs_dsymlink_hdr); | |
108 | } | |
109 | ||
110 | memcpy(link + offset, bp->b_addr, byte_cnt); | |
111 | ||
19de7351 | 112 | pathlen -= byte_cnt; |
f948dd76 | 113 | offset += byte_cnt; |
19de7351 | 114 | |
19de7351 DC |
115 | xfs_buf_relse(bp); |
116 | } | |
f948dd76 | 117 | ASSERT(pathlen == 0); |
19de7351 DC |
118 | |
119 | link[ip->i_d.di_size] = '\0'; | |
120 | error = 0; | |
121 | ||
122 | out: | |
123 | return error; | |
124 | } | |
125 | ||
126 | int | |
127 | xfs_readlink( | |
f948dd76 | 128 | struct xfs_inode *ip, |
19de7351 DC |
129 | char *link) |
130 | { | |
f948dd76 | 131 | struct xfs_mount *mp = ip->i_mount; |
19de7351 DC |
132 | xfs_fsize_t pathlen; |
133 | int error = 0; | |
134 | ||
135 | trace_xfs_readlink(ip); | |
136 | ||
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 | ||
156 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
157 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); | |
158 | link[pathlen] = '\0'; | |
159 | } else { | |
160 | error = xfs_readlink_bmap(ip, link); | |
161 | } | |
162 | ||
163 | out: | |
164 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
165 | return error; | |
166 | } | |
167 | ||
168 | int | |
169 | xfs_symlink( | |
f948dd76 | 170 | struct xfs_inode *dp, |
19de7351 DC |
171 | struct xfs_name *link_name, |
172 | const char *target_path, | |
173 | umode_t mode, | |
f948dd76 | 174 | struct xfs_inode **ipp) |
19de7351 | 175 | { |
f948dd76 DC |
176 | struct xfs_mount *mp = dp->i_mount; |
177 | struct xfs_trans *tp = NULL; | |
178 | struct xfs_inode *ip = NULL; | |
179 | int error = 0; | |
19de7351 | 180 | int pathlen; |
f948dd76 | 181 | struct xfs_bmap_free free_list; |
19de7351 | 182 | xfs_fsblock_t first_block; |
f948dd76 | 183 | bool unlock_dp_on_error = false; |
19de7351 DC |
184 | uint cancel_flags; |
185 | int committed; | |
186 | xfs_fileoff_t first_fsb; | |
187 | xfs_filblks_t fs_blocks; | |
188 | int nmaps; | |
f948dd76 | 189 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; |
19de7351 DC |
190 | xfs_daddr_t d; |
191 | const char *cur_chunk; | |
192 | int byte_cnt; | |
193 | int n; | |
194 | xfs_buf_t *bp; | |
195 | prid_t prid; | |
113a5683 CS |
196 | struct xfs_dquot *udqp = NULL; |
197 | struct xfs_dquot *gdqp = NULL; | |
92f8ff73 | 198 | struct xfs_dquot *pdqp = NULL; |
19de7351 DC |
199 | uint resblks; |
200 | ||
201 | *ipp = NULL; | |
19de7351 DC |
202 | |
203 | trace_xfs_symlink(dp, link_name); | |
204 | ||
205 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 206 | return -EIO; |
19de7351 DC |
207 | |
208 | /* | |
209 | * Check component lengths of the target path name. | |
210 | */ | |
211 | pathlen = strlen(target_path); | |
212 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
2451337d | 213 | return -ENAMETOOLONG; |
19de7351 DC |
214 | |
215 | udqp = gdqp = NULL; | |
163467d3 | 216 | prid = xfs_get_initial_prid(dp); |
19de7351 DC |
217 | |
218 | /* | |
219 | * Make sure that we have allocated dquot(s) on disk. | |
220 | */ | |
7aab1b28 DE |
221 | error = xfs_qm_vop_dqalloc(dp, |
222 | xfs_kuid_to_uid(current_fsuid()), | |
223 | xfs_kgid_to_gid(current_fsgid()), prid, | |
224 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, | |
225 | &udqp, &gdqp, &pdqp); | |
19de7351 DC |
226 | if (error) |
227 | goto std_return; | |
228 | ||
229 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
230 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
231 | /* | |
232 | * The symlink will fit into the inode data fork? | |
233 | * There can't be any attributes so we get the whole variable part. | |
234 | */ | |
235 | if (pathlen <= XFS_LITINO(mp, dp->i_d.di_version)) | |
236 | fs_blocks = 0; | |
237 | else | |
321a9583 | 238 | fs_blocks = xfs_symlink_blocks(mp, pathlen); |
19de7351 | 239 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
3d3c8b52 | 240 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_symlink, resblks, 0); |
2451337d | 241 | if (error == -ENOSPC && fs_blocks == 0) { |
19de7351 | 242 | resblks = 0; |
3d3c8b52 | 243 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_symlink, 0, 0); |
19de7351 DC |
244 | } |
245 | if (error) { | |
246 | cancel_flags = 0; | |
247 | goto error_return; | |
248 | } | |
249 | ||
250 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); | |
251 | unlock_dp_on_error = true; | |
252 | ||
253 | /* | |
254 | * Check whether the directory allows new symlinks or not. | |
255 | */ | |
256 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
2451337d | 257 | error = -EPERM; |
19de7351 DC |
258 | goto error_return; |
259 | } | |
260 | ||
261 | /* | |
262 | * Reserve disk quota : blocks and inode. | |
263 | */ | |
92f8ff73 CS |
264 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, |
265 | pdqp, resblks, 1, 0); | |
19de7351 DC |
266 | if (error) |
267 | goto error_return; | |
268 | ||
269 | /* | |
270 | * Check for ability to enter directory entry, if no space reserved. | |
271 | */ | |
94f3cad5 ES |
272 | if (!resblks) { |
273 | error = xfs_dir_canenter(tp, dp, link_name); | |
274 | if (error) | |
275 | goto error_return; | |
276 | } | |
19de7351 DC |
277 | /* |
278 | * Initialize the bmap freelist prior to calling either | |
279 | * bmapi or the directory create code. | |
280 | */ | |
281 | xfs_bmap_init(&free_list, &first_block); | |
282 | ||
283 | /* | |
284 | * Allocate an inode for the symlink. | |
285 | */ | |
286 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, | |
287 | prid, resblks > 0, &ip, NULL); | |
288 | if (error) { | |
2451337d | 289 | if (error == -ENOSPC) |
19de7351 DC |
290 | goto error_return; |
291 | goto error1; | |
292 | } | |
293 | ||
294 | /* | |
295 | * An error after we've joined dp to the transaction will result in the | |
296 | * transaction cancel unlocking dp so don't do it explicitly in the | |
297 | * error path. | |
298 | */ | |
299 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); | |
300 | unlock_dp_on_error = false; | |
301 | ||
302 | /* | |
303 | * Also attach the dquot(s) to it, if applicable. | |
304 | */ | |
92f8ff73 | 305 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); |
19de7351 DC |
306 | |
307 | if (resblks) | |
308 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
309 | /* | |
310 | * If the symlink will fit into the inode, write it inline. | |
311 | */ | |
312 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
313 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
314 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
315 | ip->i_d.di_size = pathlen; | |
316 | ||
317 | /* | |
318 | * The inode was initially created in extent format. | |
319 | */ | |
320 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
321 | ip->i_df.if_flags |= XFS_IFINLINE; | |
322 | ||
323 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
324 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
325 | ||
326 | } else { | |
f948dd76 DC |
327 | int offset; |
328 | ||
19de7351 DC |
329 | first_fsb = 0; |
330 | nmaps = XFS_SYMLINK_MAPS; | |
331 | ||
332 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, | |
333 | XFS_BMAPI_METADATA, &first_block, resblks, | |
334 | mval, &nmaps, &free_list); | |
335 | if (error) | |
336 | goto error2; | |
337 | ||
338 | if (resblks) | |
339 | resblks -= fs_blocks; | |
340 | ip->i_d.di_size = pathlen; | |
341 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
342 | ||
343 | cur_chunk = target_path; | |
f948dd76 | 344 | offset = 0; |
19de7351 | 345 | for (n = 0; n < nmaps; n++) { |
321a9583 | 346 | char *buf; |
f948dd76 | 347 | |
19de7351 DC |
348 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
349 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
350 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
351 | BTOBB(byte_cnt), 0); | |
352 | if (!bp) { | |
2451337d | 353 | error = -ENOMEM; |
19de7351 DC |
354 | goto error2; |
355 | } | |
f948dd76 DC |
356 | bp->b_ops = &xfs_symlink_buf_ops; |
357 | ||
358 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); | |
321a9583 | 359 | byte_cnt = min(byte_cnt, pathlen); |
19de7351 | 360 | |
f948dd76 DC |
361 | buf = bp->b_addr; |
362 | buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, | |
363 | byte_cnt, bp); | |
364 | ||
365 | memcpy(buf, cur_chunk, byte_cnt); | |
366 | ||
19de7351 | 367 | cur_chunk += byte_cnt; |
f948dd76 DC |
368 | pathlen -= byte_cnt; |
369 | offset += byte_cnt; | |
19de7351 | 370 | |
daf7b799 | 371 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF); |
f948dd76 DC |
372 | xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - |
373 | (char *)bp->b_addr); | |
19de7351 | 374 | } |
321a9583 | 375 | ASSERT(pathlen == 0); |
19de7351 DC |
376 | } |
377 | ||
378 | /* | |
379 | * Create the directory entry for the symlink. | |
380 | */ | |
381 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, | |
382 | &first_block, &free_list, resblks); | |
383 | if (error) | |
384 | goto error2; | |
385 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
386 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
387 | ||
388 | /* | |
389 | * If this is a synchronous mount, make sure that the | |
390 | * symlink transaction goes to disk before returning to | |
391 | * the user. | |
392 | */ | |
393 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
394 | xfs_trans_set_sync(tp); | |
395 | } | |
396 | ||
397 | error = xfs_bmap_finish(&tp, &free_list, &committed); | |
398 | if (error) { | |
399 | goto error2; | |
400 | } | |
401 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
402 | xfs_qm_dqrele(udqp); | |
403 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 404 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
405 | |
406 | *ipp = ip; | |
407 | return 0; | |
408 | ||
409 | error2: | |
410 | IRELE(ip); | |
411 | error1: | |
412 | xfs_bmap_cancel(&free_list); | |
413 | cancel_flags |= XFS_TRANS_ABORT; | |
414 | error_return: | |
415 | xfs_trans_cancel(tp, cancel_flags); | |
416 | xfs_qm_dqrele(udqp); | |
417 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 418 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
419 | |
420 | if (unlock_dp_on_error) | |
421 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
422 | std_return: | |
423 | return error; | |
424 | } | |
425 | ||
426 | /* | |
427 | * Free a symlink that has blocks associated with it. | |
428 | */ | |
725eb1eb | 429 | STATIC int |
19de7351 | 430 | xfs_inactive_symlink_rmt( |
36b21dde | 431 | struct xfs_inode *ip) |
19de7351 DC |
432 | { |
433 | xfs_buf_t *bp; | |
434 | int committed; | |
435 | int done; | |
436 | int error; | |
437 | xfs_fsblock_t first_block; | |
438 | xfs_bmap_free_t free_list; | |
439 | int i; | |
440 | xfs_mount_t *mp; | |
441 | xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; | |
442 | int nmaps; | |
19de7351 DC |
443 | int size; |
444 | xfs_trans_t *tp; | |
445 | ||
19de7351 | 446 | mp = ip->i_mount; |
725eb1eb | 447 | ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS); |
19de7351 DC |
448 | /* |
449 | * We're freeing a symlink that has some | |
450 | * blocks allocated to it. Free the | |
451 | * blocks here. We know that we've got | |
452 | * either 1 or 2 extents and that we can | |
453 | * free them all in one bunmapi call. | |
454 | */ | |
455 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
456 | ||
36b21dde BF |
457 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
458 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); | |
459 | if (error) { | |
460 | xfs_trans_cancel(tp, 0); | |
461 | return error; | |
462 | } | |
463 | ||
464 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
465 | xfs_trans_ijoin(tp, ip, 0); | |
466 | ||
19de7351 DC |
467 | /* |
468 | * Lock the inode, fix the size, and join it to the transaction. | |
469 | * Hold it so in the normal path, we still have it locked for | |
470 | * the second transaction. In the error paths we need it | |
471 | * held so the cancel won't rele it, see below. | |
472 | */ | |
473 | size = (int)ip->i_d.di_size; | |
474 | ip->i_d.di_size = 0; | |
475 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
476 | /* | |
477 | * Find the block(s) so we can inval and unmap them. | |
478 | */ | |
479 | done = 0; | |
480 | xfs_bmap_init(&free_list, &first_block); | |
481 | nmaps = ARRAY_SIZE(mval); | |
f948dd76 | 482 | error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), |
19de7351 DC |
483 | mval, &nmaps, 0); |
484 | if (error) | |
36b21dde | 485 | goto error_trans_cancel; |
19de7351 | 486 | /* |
f948dd76 | 487 | * Invalidate the block(s). No validation is done. |
19de7351 DC |
488 | */ |
489 | for (i = 0; i < nmaps; i++) { | |
490 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
491 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
492 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
493 | if (!bp) { | |
2451337d | 494 | error = -ENOMEM; |
36b21dde | 495 | goto error_bmap_cancel; |
19de7351 DC |
496 | } |
497 | xfs_trans_binval(tp, bp); | |
498 | } | |
499 | /* | |
500 | * Unmap the dead block(s) to the free_list. | |
501 | */ | |
36b21dde BF |
502 | error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, |
503 | &first_block, &free_list, &done); | |
504 | if (error) | |
505 | goto error_bmap_cancel; | |
19de7351 DC |
506 | ASSERT(done); |
507 | /* | |
508 | * Commit the first transaction. This logs the EFI and the inode. | |
509 | */ | |
36b21dde BF |
510 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
511 | if (error) | |
512 | goto error_bmap_cancel; | |
19de7351 DC |
513 | /* |
514 | * The transaction must have been committed, since there were | |
515 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
516 | * The new tp has the extent freeing and EFDs. | |
517 | */ | |
518 | ASSERT(committed); | |
519 | /* | |
520 | * The first xact was committed, so add the inode to the new one. | |
521 | * Mark it dirty so it will be logged and moved forward in the log as | |
522 | * part of every commit. | |
523 | */ | |
524 | xfs_trans_ijoin(tp, ip, 0); | |
525 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
19de7351 DC |
526 | /* |
527 | * Commit the transaction containing extent freeing and EFDs. | |
19de7351 | 528 | */ |
36b21dde | 529 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
19de7351 DC |
530 | if (error) { |
531 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
36b21dde | 532 | goto error_unlock; |
19de7351 | 533 | } |
19de7351 DC |
534 | |
535 | /* | |
536 | * Remove the memory for extent descriptions (just bookkeeping). | |
537 | */ | |
538 | if (ip->i_df.if_bytes) | |
539 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
540 | ASSERT(ip->i_df.if_bytes == 0); | |
19de7351 | 541 | |
36b21dde | 542 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
19de7351 DC |
543 | return 0; |
544 | ||
36b21dde | 545 | error_bmap_cancel: |
19de7351 | 546 | xfs_bmap_cancel(&free_list); |
36b21dde BF |
547 | error_trans_cancel: |
548 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
549 | error_unlock: | |
550 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
19de7351 DC |
551 | return error; |
552 | } | |
725eb1eb MT |
553 | |
554 | /* | |
555 | * xfs_inactive_symlink - free a symlink | |
556 | */ | |
557 | int | |
558 | xfs_inactive_symlink( | |
36b21dde | 559 | struct xfs_inode *ip) |
725eb1eb MT |
560 | { |
561 | struct xfs_mount *mp = ip->i_mount; | |
562 | int pathlen; | |
563 | ||
564 | trace_xfs_inactive_symlink(ip); | |
565 | ||
725eb1eb | 566 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 567 | return -EIO; |
725eb1eb | 568 | |
36b21dde BF |
569 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
570 | ||
725eb1eb MT |
571 | /* |
572 | * Zero length symlinks _can_ exist. | |
573 | */ | |
574 | pathlen = (int)ip->i_d.di_size; | |
36b21dde BF |
575 | if (!pathlen) { |
576 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
725eb1eb | 577 | return 0; |
36b21dde | 578 | } |
725eb1eb MT |
579 | |
580 | if (pathlen < 0 || pathlen > MAXPATHLEN) { | |
581 | xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", | |
582 | __func__, (unsigned long long)ip->i_ino, pathlen); | |
36b21dde | 583 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb | 584 | ASSERT(0); |
2451337d | 585 | return -EFSCORRUPTED; |
725eb1eb MT |
586 | } |
587 | ||
588 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
36b21dde | 589 | if (ip->i_df.if_bytes > 0) |
725eb1eb MT |
590 | xfs_idata_realloc(ip, -(ip->i_df.if_bytes), |
591 | XFS_DATA_FORK); | |
36b21dde | 592 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb MT |
593 | ASSERT(ip->i_df.if_bytes == 0); |
594 | return 0; | |
595 | } | |
596 | ||
36b21dde BF |
597 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
598 | ||
725eb1eb | 599 | /* remove the remote symlink */ |
36b21dde | 600 | return xfs_inactive_symlink_rmt(ip); |
725eb1eb | 601 | } |