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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
19de7351 DC |
2 | /* |
3 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. | |
4 | * Copyright (c) 2012-2013 Red Hat, Inc. | |
5 | * All rights reserved. | |
19de7351 DC |
6 | */ |
7 | #include "xfs.h" | |
239880ef | 8 | #include "xfs_shared.h" |
19de7351 | 9 | #include "xfs_fs.h" |
6ca1c906 | 10 | #include "xfs_format.h" |
239880ef DC |
11 | #include "xfs_log_format.h" |
12 | #include "xfs_trans_resv.h" | |
19de7351 | 13 | #include "xfs_bit.h" |
19de7351 | 14 | #include "xfs_mount.h" |
57062787 | 15 | #include "xfs_da_format.h" |
d6cf1305 | 16 | #include "xfs_da_btree.h" |
3ab78df2 | 17 | #include "xfs_defer.h" |
2b9ab5ab | 18 | #include "xfs_dir2.h" |
19de7351 | 19 | #include "xfs_inode.h" |
19de7351 DC |
20 | #include "xfs_ialloc.h" |
21 | #include "xfs_alloc.h" | |
22 | #include "xfs_bmap.h" | |
a4fbe6ab | 23 | #include "xfs_bmap_btree.h" |
68988114 | 24 | #include "xfs_bmap_util.h" |
19de7351 DC |
25 | #include "xfs_error.h" |
26 | #include "xfs_quota.h" | |
19de7351 | 27 | #include "xfs_trans_space.h" |
19de7351 DC |
28 | #include "xfs_trace.h" |
29 | #include "xfs_symlink.h" | |
239880ef | 30 | #include "xfs_trans.h" |
239880ef | 31 | #include "xfs_log.h" |
19de7351 DC |
32 | |
33 | /* ----- Kernel only functions below ----- */ | |
5da8f2f8 DW |
34 | int |
35 | xfs_readlink_bmap_ilocked( | |
f948dd76 DC |
36 | struct xfs_inode *ip, |
37 | char *link) | |
19de7351 | 38 | { |
f948dd76 DC |
39 | struct xfs_mount *mp = ip->i_mount; |
40 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; | |
41 | struct xfs_buf *bp; | |
42 | xfs_daddr_t d; | |
43 | char *cur_chunk; | |
44 | int pathlen = ip->i_d.di_size; | |
45 | int nmaps = XFS_SYMLINK_MAPS; | |
46 | int byte_cnt; | |
47 | int n; | |
48 | int error = 0; | |
49 | int fsblocks = 0; | |
50 | int offset; | |
19de7351 | 51 | |
29db2500 CH |
52 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); |
53 | ||
f948dd76 DC |
54 | fsblocks = xfs_symlink_blocks(mp, pathlen); |
55 | error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0); | |
19de7351 DC |
56 | if (error) |
57 | goto out; | |
58 | ||
f948dd76 | 59 | offset = 0; |
19de7351 DC |
60 | for (n = 0; n < nmaps; n++) { |
61 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
62 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
63 | ||
f948dd76 DC |
64 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, |
65 | &xfs_symlink_buf_ops); | |
19de7351 | 66 | if (!bp) |
2451337d | 67 | return -ENOMEM; |
19de7351 DC |
68 | error = bp->b_error; |
69 | if (error) { | |
70 | xfs_buf_ioerror_alert(bp, __func__); | |
71 | xfs_buf_relse(bp); | |
ac75a1f7 DC |
72 | |
73 | /* bad CRC means corrupted metadata */ | |
2451337d DC |
74 | if (error == -EFSBADCRC) |
75 | error = -EFSCORRUPTED; | |
19de7351 DC |
76 | goto out; |
77 | } | |
f948dd76 | 78 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); |
19de7351 DC |
79 | if (pathlen < byte_cnt) |
80 | byte_cnt = pathlen; | |
f948dd76 DC |
81 | |
82 | cur_chunk = bp->b_addr; | |
83 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
bda65ef8 | 84 | if (!xfs_symlink_hdr_ok(ip->i_ino, offset, |
f948dd76 | 85 | byte_cnt, bp)) { |
2451337d | 86 | error = -EFSCORRUPTED; |
f948dd76 DC |
87 | xfs_alert(mp, |
88 | "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)", | |
89 | offset, byte_cnt, ip->i_ino); | |
90 | xfs_buf_relse(bp); | |
91 | goto out; | |
92 | ||
93 | } | |
94 | ||
95 | cur_chunk += sizeof(struct xfs_dsymlink_hdr); | |
96 | } | |
97 | ||
2ac56d3d | 98 | memcpy(link + offset, cur_chunk, byte_cnt); |
f948dd76 | 99 | |
19de7351 | 100 | pathlen -= byte_cnt; |
f948dd76 | 101 | offset += byte_cnt; |
19de7351 | 102 | |
19de7351 DC |
103 | xfs_buf_relse(bp); |
104 | } | |
f948dd76 | 105 | ASSERT(pathlen == 0); |
19de7351 DC |
106 | |
107 | link[ip->i_d.di_size] = '\0'; | |
108 | error = 0; | |
109 | ||
110 | out: | |
111 | return error; | |
112 | } | |
113 | ||
114 | int | |
115 | xfs_readlink( | |
f948dd76 | 116 | struct xfs_inode *ip, |
19de7351 DC |
117 | char *link) |
118 | { | |
f948dd76 | 119 | struct xfs_mount *mp = ip->i_mount; |
19de7351 DC |
120 | xfs_fsize_t pathlen; |
121 | int error = 0; | |
122 | ||
123 | trace_xfs_readlink(ip); | |
124 | ||
30ee052e CH |
125 | ASSERT(!(ip->i_df.if_flags & XFS_IFINLINE)); |
126 | ||
19de7351 | 127 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 128 | return -EIO; |
19de7351 DC |
129 | |
130 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
131 | ||
132 | pathlen = ip->i_d.di_size; | |
133 | if (!pathlen) | |
134 | goto out; | |
135 | ||
6eb0b8df | 136 | if (pathlen < 0 || pathlen > XFS_SYMLINK_MAXLEN) { |
19de7351 DC |
137 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", |
138 | __func__, (unsigned long long) ip->i_ino, | |
139 | (long long) pathlen); | |
140 | ASSERT(0); | |
2451337d | 141 | error = -EFSCORRUPTED; |
19de7351 DC |
142 | goto out; |
143 | } | |
144 | ||
145 | ||
5da8f2f8 | 146 | error = xfs_readlink_bmap_ilocked(ip, link); |
19de7351 DC |
147 | |
148 | out: | |
149 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
150 | return error; | |
151 | } | |
152 | ||
153 | int | |
154 | xfs_symlink( | |
f948dd76 | 155 | struct xfs_inode *dp, |
19de7351 DC |
156 | struct xfs_name *link_name, |
157 | const char *target_path, | |
158 | umode_t mode, | |
f948dd76 | 159 | struct xfs_inode **ipp) |
19de7351 | 160 | { |
f948dd76 DC |
161 | struct xfs_mount *mp = dp->i_mount; |
162 | struct xfs_trans *tp = NULL; | |
163 | struct xfs_inode *ip = NULL; | |
164 | int error = 0; | |
19de7351 | 165 | int pathlen; |
2c3234d1 | 166 | struct xfs_defer_ops dfops; |
58c90473 | 167 | bool unlock_dp_on_error = false; |
19de7351 DC |
168 | xfs_fileoff_t first_fsb; |
169 | xfs_filblks_t fs_blocks; | |
170 | int nmaps; | |
f948dd76 | 171 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; |
19de7351 DC |
172 | xfs_daddr_t d; |
173 | const char *cur_chunk; | |
174 | int byte_cnt; | |
175 | int n; | |
176 | xfs_buf_t *bp; | |
177 | prid_t prid; | |
113a5683 CS |
178 | struct xfs_dquot *udqp = NULL; |
179 | struct xfs_dquot *gdqp = NULL; | |
92f8ff73 | 180 | struct xfs_dquot *pdqp = NULL; |
19de7351 DC |
181 | uint resblks; |
182 | ||
183 | *ipp = NULL; | |
19de7351 DC |
184 | |
185 | trace_xfs_symlink(dp, link_name); | |
186 | ||
187 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 188 | return -EIO; |
19de7351 DC |
189 | |
190 | /* | |
191 | * Check component lengths of the target path name. | |
192 | */ | |
193 | pathlen = strlen(target_path); | |
6eb0b8df | 194 | if (pathlen >= XFS_SYMLINK_MAXLEN) /* total string too long */ |
2451337d | 195 | return -ENAMETOOLONG; |
19de7351 DC |
196 | |
197 | udqp = gdqp = NULL; | |
163467d3 | 198 | prid = xfs_get_initial_prid(dp); |
19de7351 DC |
199 | |
200 | /* | |
201 | * Make sure that we have allocated dquot(s) on disk. | |
202 | */ | |
7aab1b28 DE |
203 | error = xfs_qm_vop_dqalloc(dp, |
204 | xfs_kuid_to_uid(current_fsuid()), | |
205 | xfs_kgid_to_gid(current_fsgid()), prid, | |
206 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, | |
207 | &udqp, &gdqp, &pdqp); | |
19de7351 | 208 | if (error) |
58c90473 | 209 | return error; |
19de7351 | 210 | |
19de7351 DC |
211 | /* |
212 | * The symlink will fit into the inode data fork? | |
213 | * There can't be any attributes so we get the whole variable part. | |
214 | */ | |
215 | if (pathlen <= XFS_LITINO(mp, dp->i_d.di_version)) | |
216 | fs_blocks = 0; | |
217 | else | |
321a9583 | 218 | fs_blocks = xfs_symlink_blocks(mp, pathlen); |
19de7351 | 219 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
253f4911 CH |
220 | |
221 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_symlink, resblks, 0, 0, &tp); | |
4906e215 | 222 | if (error) |
253f4911 | 223 | goto out_release_inode; |
19de7351 | 224 | |
65523218 | 225 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
19de7351 DC |
226 | unlock_dp_on_error = true; |
227 | ||
228 | /* | |
229 | * Check whether the directory allows new symlinks or not. | |
230 | */ | |
231 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
2451337d | 232 | error = -EPERM; |
58c90473 | 233 | goto out_trans_cancel; |
19de7351 DC |
234 | } |
235 | ||
236 | /* | |
237 | * Reserve disk quota : blocks and inode. | |
238 | */ | |
92f8ff73 CS |
239 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, |
240 | pdqp, resblks, 1, 0); | |
19de7351 | 241 | if (error) |
58c90473 | 242 | goto out_trans_cancel; |
19de7351 | 243 | |
19de7351 DC |
244 | /* |
245 | * Initialize the bmap freelist prior to calling either | |
246 | * bmapi or the directory create code. | |
247 | */ | |
f16dea54 | 248 | xfs_defer_init(tp, &dfops, &tp->t_firstblock); |
19de7351 DC |
249 | |
250 | /* | |
251 | * Allocate an inode for the symlink. | |
252 | */ | |
253 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0, | |
c959025e | 254 | prid, &ip); |
58c90473 DC |
255 | if (error) |
256 | goto out_trans_cancel; | |
19de7351 DC |
257 | |
258 | /* | |
58c90473 DC |
259 | * Now we join the directory inode to the transaction. We do not do it |
260 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
261 | * (and release all the locks). An error from here on will result in | |
262 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
19de7351 DC |
263 | * error path. |
264 | */ | |
65523218 | 265 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
19de7351 DC |
266 | unlock_dp_on_error = false; |
267 | ||
268 | /* | |
269 | * Also attach the dquot(s) to it, if applicable. | |
270 | */ | |
92f8ff73 | 271 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); |
19de7351 DC |
272 | |
273 | if (resblks) | |
274 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
275 | /* | |
276 | * If the symlink will fit into the inode, write it inline. | |
277 | */ | |
278 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
143f4aed | 279 | xfs_init_local_fork(ip, XFS_DATA_FORK, target_path, pathlen); |
19de7351 | 280 | |
143f4aed | 281 | ip->i_d.di_size = pathlen; |
19de7351 DC |
282 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; |
283 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
19de7351 | 284 | } else { |
f948dd76 DC |
285 | int offset; |
286 | ||
19de7351 DC |
287 | first_fsb = 0; |
288 | nmaps = XFS_SYMLINK_MAPS; | |
289 | ||
290 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, | |
a7beabea | 291 | XFS_BMAPI_METADATA, resblks, mval, &nmaps); |
19de7351 | 292 | if (error) |
58c90473 | 293 | goto out_bmap_cancel; |
19de7351 DC |
294 | |
295 | if (resblks) | |
296 | resblks -= fs_blocks; | |
297 | ip->i_d.di_size = pathlen; | |
298 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
299 | ||
300 | cur_chunk = target_path; | |
f948dd76 | 301 | offset = 0; |
19de7351 | 302 | for (n = 0; n < nmaps; n++) { |
321a9583 | 303 | char *buf; |
f948dd76 | 304 | |
19de7351 DC |
305 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
306 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
307 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
308 | BTOBB(byte_cnt), 0); | |
309 | if (!bp) { | |
2451337d | 310 | error = -ENOMEM; |
58c90473 | 311 | goto out_bmap_cancel; |
19de7351 | 312 | } |
f948dd76 DC |
313 | bp->b_ops = &xfs_symlink_buf_ops; |
314 | ||
315 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); | |
321a9583 | 316 | byte_cnt = min(byte_cnt, pathlen); |
19de7351 | 317 | |
f948dd76 DC |
318 | buf = bp->b_addr; |
319 | buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, | |
320 | byte_cnt, bp); | |
321 | ||
322 | memcpy(buf, cur_chunk, byte_cnt); | |
323 | ||
19de7351 | 324 | cur_chunk += byte_cnt; |
f948dd76 DC |
325 | pathlen -= byte_cnt; |
326 | offset += byte_cnt; | |
19de7351 | 327 | |
daf7b799 | 328 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF); |
f948dd76 DC |
329 | xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - |
330 | (char *)bp->b_addr); | |
19de7351 | 331 | } |
321a9583 | 332 | ASSERT(pathlen == 0); |
19de7351 DC |
333 | } |
334 | ||
335 | /* | |
336 | * Create the directory entry for the symlink. | |
337 | */ | |
381eee69 | 338 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, resblks); |
19de7351 | 339 | if (error) |
58c90473 | 340 | goto out_bmap_cancel; |
19de7351 DC |
341 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
342 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
343 | ||
344 | /* | |
345 | * If this is a synchronous mount, make sure that the | |
346 | * symlink transaction goes to disk before returning to | |
347 | * the user. | |
348 | */ | |
349 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
350 | xfs_trans_set_sync(tp); | |
351 | } | |
352 | ||
175d1a01 | 353 | error = xfs_defer_finish(&tp, tp->t_dfops); |
58c90473 DC |
354 | if (error) |
355 | goto out_bmap_cancel; | |
356 | ||
70393313 | 357 | error = xfs_trans_commit(tp); |
58c90473 DC |
358 | if (error) |
359 | goto out_release_inode; | |
360 | ||
19de7351 DC |
361 | xfs_qm_dqrele(udqp); |
362 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 363 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
364 | |
365 | *ipp = ip; | |
366 | return 0; | |
367 | ||
58c90473 | 368 | out_bmap_cancel: |
175d1a01 | 369 | xfs_defer_cancel(tp->t_dfops); |
58c90473 | 370 | out_trans_cancel: |
4906e215 | 371 | xfs_trans_cancel(tp); |
58c90473 DC |
372 | out_release_inode: |
373 | /* | |
374 | * Wait until after the current transaction is aborted to finish the | |
375 | * setup of the inode and release the inode. This prevents recursive | |
376 | * transactions and deadlocks from xfs_inactive. | |
377 | */ | |
378 | if (ip) { | |
379 | xfs_finish_inode_setup(ip); | |
380 | IRELE(ip); | |
381 | } | |
382 | ||
19de7351 DC |
383 | xfs_qm_dqrele(udqp); |
384 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 385 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
386 | |
387 | if (unlock_dp_on_error) | |
65523218 | 388 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
19de7351 DC |
389 | return error; |
390 | } | |
391 | ||
392 | /* | |
393 | * Free a symlink that has blocks associated with it. | |
394 | */ | |
725eb1eb | 395 | STATIC int |
19de7351 | 396 | xfs_inactive_symlink_rmt( |
36b21dde | 397 | struct xfs_inode *ip) |
19de7351 DC |
398 | { |
399 | xfs_buf_t *bp; | |
19de7351 DC |
400 | int done; |
401 | int error; | |
2c3234d1 | 402 | struct xfs_defer_ops dfops; |
19de7351 DC |
403 | int i; |
404 | xfs_mount_t *mp; | |
405 | xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; | |
406 | int nmaps; | |
19de7351 DC |
407 | int size; |
408 | xfs_trans_t *tp; | |
409 | ||
19de7351 | 410 | mp = ip->i_mount; |
725eb1eb | 411 | ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS); |
19de7351 DC |
412 | /* |
413 | * We're freeing a symlink that has some | |
414 | * blocks allocated to it. Free the | |
415 | * blocks here. We know that we've got | |
416 | * either 1 or 2 extents and that we can | |
417 | * free them all in one bunmapi call. | |
418 | */ | |
419 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
420 | ||
253f4911 CH |
421 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
422 | if (error) | |
36b21dde | 423 | return error; |
36b21dde BF |
424 | |
425 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
426 | xfs_trans_ijoin(tp, ip, 0); | |
427 | ||
19de7351 DC |
428 | /* |
429 | * Lock the inode, fix the size, and join it to the transaction. | |
430 | * Hold it so in the normal path, we still have it locked for | |
431 | * the second transaction. In the error paths we need it | |
432 | * held so the cancel won't rele it, see below. | |
433 | */ | |
434 | size = (int)ip->i_d.di_size; | |
435 | ip->i_d.di_size = 0; | |
436 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
437 | /* | |
438 | * Find the block(s) so we can inval and unmap them. | |
439 | */ | |
440 | done = 0; | |
37283797 | 441 | xfs_defer_init(tp, &dfops, &tp->t_firstblock); |
19de7351 | 442 | nmaps = ARRAY_SIZE(mval); |
f948dd76 | 443 | error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), |
19de7351 DC |
444 | mval, &nmaps, 0); |
445 | if (error) | |
36b21dde | 446 | goto error_trans_cancel; |
19de7351 | 447 | /* |
f948dd76 | 448 | * Invalidate the block(s). No validation is done. |
19de7351 DC |
449 | */ |
450 | for (i = 0; i < nmaps; i++) { | |
451 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
452 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
453 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
454 | if (!bp) { | |
2451337d | 455 | error = -ENOMEM; |
36b21dde | 456 | goto error_bmap_cancel; |
19de7351 DC |
457 | } |
458 | xfs_trans_binval(tp, bp); | |
459 | } | |
460 | /* | |
2c3234d1 | 461 | * Unmap the dead block(s) to the dfops. |
19de7351 | 462 | */ |
37283797 BF |
463 | error = xfs_bunmapi(tp, ip, 0, size, 0, nmaps, &tp->t_firstblock, |
464 | &done); | |
36b21dde BF |
465 | if (error) |
466 | goto error_bmap_cancel; | |
19de7351 DC |
467 | ASSERT(done); |
468 | /* | |
469 | * Commit the first transaction. This logs the EFI and the inode. | |
470 | */ | |
4bcfa613 BF |
471 | xfs_defer_ijoin(tp->t_dfops, ip); |
472 | error = xfs_defer_finish(&tp, tp->t_dfops); | |
36b21dde BF |
473 | if (error) |
474 | goto error_bmap_cancel; | |
3565b660 | 475 | |
19de7351 DC |
476 | /* |
477 | * Commit the transaction containing extent freeing and EFDs. | |
19de7351 | 478 | */ |
3565b660 | 479 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
70393313 | 480 | error = xfs_trans_commit(tp); |
19de7351 DC |
481 | if (error) { |
482 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
36b21dde | 483 | goto error_unlock; |
19de7351 | 484 | } |
19de7351 DC |
485 | |
486 | /* | |
487 | * Remove the memory for extent descriptions (just bookkeeping). | |
488 | */ | |
489 | if (ip->i_df.if_bytes) | |
490 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
491 | ASSERT(ip->i_df.if_bytes == 0); | |
19de7351 | 492 | |
36b21dde | 493 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
19de7351 DC |
494 | return 0; |
495 | ||
36b21dde | 496 | error_bmap_cancel: |
4bcfa613 | 497 | xfs_defer_cancel(tp->t_dfops); |
36b21dde | 498 | error_trans_cancel: |
4906e215 | 499 | xfs_trans_cancel(tp); |
36b21dde BF |
500 | error_unlock: |
501 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
19de7351 DC |
502 | return error; |
503 | } | |
725eb1eb MT |
504 | |
505 | /* | |
506 | * xfs_inactive_symlink - free a symlink | |
507 | */ | |
508 | int | |
509 | xfs_inactive_symlink( | |
36b21dde | 510 | struct xfs_inode *ip) |
725eb1eb MT |
511 | { |
512 | struct xfs_mount *mp = ip->i_mount; | |
513 | int pathlen; | |
514 | ||
515 | trace_xfs_inactive_symlink(ip); | |
516 | ||
725eb1eb | 517 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 518 | return -EIO; |
725eb1eb | 519 | |
36b21dde BF |
520 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
521 | ||
725eb1eb MT |
522 | /* |
523 | * Zero length symlinks _can_ exist. | |
524 | */ | |
525 | pathlen = (int)ip->i_d.di_size; | |
36b21dde BF |
526 | if (!pathlen) { |
527 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
725eb1eb | 528 | return 0; |
36b21dde | 529 | } |
725eb1eb | 530 | |
6eb0b8df | 531 | if (pathlen < 0 || pathlen > XFS_SYMLINK_MAXLEN) { |
725eb1eb MT |
532 | xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", |
533 | __func__, (unsigned long long)ip->i_ino, pathlen); | |
36b21dde | 534 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb | 535 | ASSERT(0); |
2451337d | 536 | return -EFSCORRUPTED; |
725eb1eb MT |
537 | } |
538 | ||
539 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
36b21dde | 540 | if (ip->i_df.if_bytes > 0) |
725eb1eb MT |
541 | xfs_idata_realloc(ip, -(ip->i_df.if_bytes), |
542 | XFS_DATA_FORK); | |
36b21dde | 543 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb MT |
544 | ASSERT(ip->i_df.if_bytes == 0); |
545 | return 0; | |
546 | } | |
547 | ||
36b21dde BF |
548 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
549 | ||
725eb1eb | 550 | /* remove the remote symlink */ |
36b21dde | 551 | return xfs_inactive_symlink_rmt(ip); |
725eb1eb | 552 | } |