Commit | Line | Data |
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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" |
2b9ab5ab | 15 | #include "xfs_dir2.h" |
19de7351 | 16 | #include "xfs_inode.h" |
19de7351 | 17 | #include "xfs_bmap.h" |
a4fbe6ab | 18 | #include "xfs_bmap_btree.h" |
19de7351 | 19 | #include "xfs_quota.h" |
5f213ddb | 20 | #include "xfs_symlink.h" |
19de7351 | 21 | #include "xfs_trans_space.h" |
19de7351 | 22 | #include "xfs_trace.h" |
239880ef | 23 | #include "xfs_trans.h" |
b652afd9 | 24 | #include "xfs_ialloc.h" |
7b7820b8 | 25 | #include "xfs_error.h" |
19de7351 DC |
26 | |
27 | /* ----- Kernel only functions below ----- */ | |
5da8f2f8 DW |
28 | int |
29 | xfs_readlink_bmap_ilocked( | |
f948dd76 DC |
30 | struct xfs_inode *ip, |
31 | char *link) | |
19de7351 | 32 | { |
f948dd76 DC |
33 | struct xfs_mount *mp = ip->i_mount; |
34 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; | |
35 | struct xfs_buf *bp; | |
36 | xfs_daddr_t d; | |
37 | char *cur_chunk; | |
13d2c10b | 38 | int pathlen = ip->i_disk_size; |
f948dd76 DC |
39 | int nmaps = XFS_SYMLINK_MAPS; |
40 | int byte_cnt; | |
41 | int n; | |
42 | int error = 0; | |
43 | int fsblocks = 0; | |
44 | int offset; | |
19de7351 | 45 | |
29db2500 CH |
46 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); |
47 | ||
f948dd76 DC |
48 | fsblocks = xfs_symlink_blocks(mp, pathlen); |
49 | error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0); | |
19de7351 DC |
50 | if (error) |
51 | goto out; | |
52 | ||
f948dd76 | 53 | offset = 0; |
19de7351 DC |
54 | for (n = 0; n < nmaps; n++) { |
55 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
56 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
57 | ||
0e3eccce DW |
58 | error = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, |
59 | &bp, &xfs_symlink_buf_ops); | |
60 | if (error) | |
61 | return error; | |
f948dd76 | 62 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); |
19de7351 DC |
63 | if (pathlen < byte_cnt) |
64 | byte_cnt = pathlen; | |
f948dd76 DC |
65 | |
66 | cur_chunk = bp->b_addr; | |
38c26bfd | 67 | if (xfs_has_crc(mp)) { |
bda65ef8 | 68 | if (!xfs_symlink_hdr_ok(ip->i_ino, offset, |
f948dd76 | 69 | byte_cnt, bp)) { |
2451337d | 70 | error = -EFSCORRUPTED; |
f948dd76 DC |
71 | xfs_alert(mp, |
72 | "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)", | |
73 | offset, byte_cnt, ip->i_ino); | |
74 | xfs_buf_relse(bp); | |
75 | goto out; | |
76 | ||
77 | } | |
78 | ||
79 | cur_chunk += sizeof(struct xfs_dsymlink_hdr); | |
80 | } | |
81 | ||
2ac56d3d | 82 | memcpy(link + offset, cur_chunk, byte_cnt); |
f948dd76 | 83 | |
19de7351 | 84 | pathlen -= byte_cnt; |
f948dd76 | 85 | offset += byte_cnt; |
19de7351 | 86 | |
19de7351 DC |
87 | xfs_buf_relse(bp); |
88 | } | |
f948dd76 | 89 | ASSERT(pathlen == 0); |
19de7351 | 90 | |
13d2c10b | 91 | link[ip->i_disk_size] = '\0'; |
19de7351 DC |
92 | error = 0; |
93 | ||
94 | out: | |
95 | return error; | |
96 | } | |
97 | ||
98 | int | |
99 | xfs_readlink( | |
7b7820b8 DW |
100 | struct xfs_inode *ip, |
101 | char *link) | |
19de7351 | 102 | { |
7b7820b8 DW |
103 | struct xfs_mount *mp = ip->i_mount; |
104 | xfs_fsize_t pathlen; | |
105 | int error = -EFSCORRUPTED; | |
19de7351 DC |
106 | |
107 | trace_xfs_readlink(ip); | |
108 | ||
75c8c50f | 109 | if (xfs_is_shutdown(mp)) |
2451337d | 110 | return -EIO; |
19de7351 DC |
111 | |
112 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
113 | ||
13d2c10b | 114 | pathlen = ip->i_disk_size; |
19de7351 DC |
115 | if (!pathlen) |
116 | goto out; | |
117 | ||
6eb0b8df | 118 | if (pathlen < 0 || pathlen > XFS_SYMLINK_MAXLEN) { |
19de7351 DC |
119 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", |
120 | __func__, (unsigned long long) ip->i_ino, | |
121 | (long long) pathlen); | |
122 | ASSERT(0); | |
19de7351 DC |
123 | goto out; |
124 | } | |
125 | ||
7b7820b8 DW |
126 | if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) { |
127 | /* | |
128 | * The VFS crashes on a NULL pointer, so return -EFSCORRUPTED | |
129 | * if if_data is junk. | |
130 | */ | |
131 | if (XFS_IS_CORRUPT(ip->i_mount, !ip->i_df.if_u1.if_data)) | |
132 | goto out; | |
133 | ||
134 | memcpy(link, ip->i_df.if_u1.if_data, pathlen + 1); | |
135 | error = 0; | |
136 | } else { | |
137 | error = xfs_readlink_bmap_ilocked(ip, link); | |
138 | } | |
19de7351 DC |
139 | |
140 | out: | |
141 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
142 | return error; | |
143 | } | |
144 | ||
145 | int | |
146 | xfs_symlink( | |
f736d93d | 147 | struct user_namespace *mnt_userns, |
f948dd76 | 148 | struct xfs_inode *dp, |
19de7351 DC |
149 | struct xfs_name *link_name, |
150 | const char *target_path, | |
151 | umode_t mode, | |
f948dd76 | 152 | struct xfs_inode **ipp) |
19de7351 | 153 | { |
f948dd76 DC |
154 | struct xfs_mount *mp = dp->i_mount; |
155 | struct xfs_trans *tp = NULL; | |
156 | struct xfs_inode *ip = NULL; | |
157 | int error = 0; | |
19de7351 | 158 | int pathlen; |
58c90473 | 159 | bool unlock_dp_on_error = false; |
19de7351 DC |
160 | xfs_fileoff_t first_fsb; |
161 | xfs_filblks_t fs_blocks; | |
162 | int nmaps; | |
f948dd76 | 163 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; |
19de7351 DC |
164 | xfs_daddr_t d; |
165 | const char *cur_chunk; | |
166 | int byte_cnt; | |
167 | int n; | |
e8222613 | 168 | struct xfs_buf *bp; |
19de7351 | 169 | prid_t prid; |
113a5683 CS |
170 | struct xfs_dquot *udqp = NULL; |
171 | struct xfs_dquot *gdqp = NULL; | |
92f8ff73 | 172 | struct xfs_dquot *pdqp = NULL; |
19de7351 | 173 | uint resblks; |
b652afd9 | 174 | xfs_ino_t ino; |
19de7351 DC |
175 | |
176 | *ipp = NULL; | |
19de7351 DC |
177 | |
178 | trace_xfs_symlink(dp, link_name); | |
179 | ||
75c8c50f | 180 | if (xfs_is_shutdown(mp)) |
2451337d | 181 | return -EIO; |
19de7351 DC |
182 | |
183 | /* | |
184 | * Check component lengths of the target path name. | |
185 | */ | |
186 | pathlen = strlen(target_path); | |
6eb0b8df | 187 | if (pathlen >= XFS_SYMLINK_MAXLEN) /* total string too long */ |
2451337d | 188 | return -ENAMETOOLONG; |
43feeea8 | 189 | ASSERT(pathlen > 0); |
19de7351 | 190 | |
163467d3 | 191 | prid = xfs_get_initial_prid(dp); |
19de7351 DC |
192 | |
193 | /* | |
194 | * Make sure that we have allocated dquot(s) on disk. | |
195 | */ | |
209188ce CB |
196 | error = xfs_qm_vop_dqalloc(dp, mapped_fsuid(mnt_userns, &init_user_ns), |
197 | mapped_fsgid(mnt_userns, &init_user_ns), prid, | |
7aab1b28 DE |
198 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, |
199 | &udqp, &gdqp, &pdqp); | |
19de7351 | 200 | if (error) |
58c90473 | 201 | return error; |
19de7351 | 202 | |
19de7351 DC |
203 | /* |
204 | * The symlink will fit into the inode data fork? | |
205 | * There can't be any attributes so we get the whole variable part. | |
206 | */ | |
e9e2eae8 | 207 | if (pathlen <= XFS_LITINO(mp)) |
19de7351 DC |
208 | fs_blocks = 0; |
209 | else | |
321a9583 | 210 | fs_blocks = xfs_symlink_blocks(mp, pathlen); |
19de7351 | 211 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
253f4911 | 212 | |
f2f7b9ff DW |
213 | error = xfs_trans_alloc_icreate(mp, &M_RES(mp)->tr_symlink, udqp, gdqp, |
214 | pdqp, resblks, &tp); | |
4906e215 | 215 | if (error) |
f2f7b9ff | 216 | goto out_release_dquots; |
19de7351 | 217 | |
65523218 | 218 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
19de7351 DC |
219 | unlock_dp_on_error = true; |
220 | ||
221 | /* | |
222 | * Check whether the directory allows new symlinks or not. | |
223 | */ | |
db07349d | 224 | if (dp->i_diflags & XFS_DIFLAG_NOSYMLINKS) { |
2451337d | 225 | error = -EPERM; |
58c90473 | 226 | goto out_trans_cancel; |
19de7351 DC |
227 | } |
228 | ||
19de7351 DC |
229 | /* |
230 | * Allocate an inode for the symlink. | |
231 | */ | |
b652afd9 DC |
232 | error = xfs_dialloc(&tp, dp->i_ino, S_IFLNK, &ino); |
233 | if (!error) | |
234 | error = xfs_init_new_inode(mnt_userns, tp, dp, ino, | |
235 | S_IFLNK | (mode & ~S_IFMT), 1, 0, prid, | |
236 | false, &ip); | |
58c90473 DC |
237 | if (error) |
238 | goto out_trans_cancel; | |
19de7351 DC |
239 | |
240 | /* | |
58c90473 DC |
241 | * Now we join the directory inode to the transaction. We do not do it |
242 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
243 | * (and release all the locks). An error from here on will result in | |
244 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
19de7351 DC |
245 | * error path. |
246 | */ | |
65523218 | 247 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
19de7351 DC |
248 | unlock_dp_on_error = false; |
249 | ||
250 | /* | |
251 | * Also attach the dquot(s) to it, if applicable. | |
252 | */ | |
92f8ff73 | 253 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); |
19de7351 | 254 | |
57fd2d8f | 255 | resblks -= XFS_IALLOC_SPACE_RES(mp); |
19de7351 DC |
256 | /* |
257 | * If the symlink will fit into the inode, write it inline. | |
258 | */ | |
259 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
143f4aed | 260 | xfs_init_local_fork(ip, XFS_DATA_FORK, target_path, pathlen); |
19de7351 | 261 | |
13d2c10b | 262 | ip->i_disk_size = pathlen; |
f7e67b20 | 263 | ip->i_df.if_format = XFS_DINODE_FMT_LOCAL; |
19de7351 | 264 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); |
19de7351 | 265 | } else { |
f948dd76 DC |
266 | int offset; |
267 | ||
19de7351 DC |
268 | first_fsb = 0; |
269 | nmaps = XFS_SYMLINK_MAPS; | |
270 | ||
271 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, | |
a7beabea | 272 | XFS_BMAPI_METADATA, resblks, mval, &nmaps); |
19de7351 | 273 | if (error) |
c8eac49e | 274 | goto out_trans_cancel; |
19de7351 | 275 | |
57fd2d8f | 276 | resblks -= fs_blocks; |
13d2c10b | 277 | ip->i_disk_size = pathlen; |
19de7351 DC |
278 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
279 | ||
280 | cur_chunk = target_path; | |
f948dd76 | 281 | offset = 0; |
19de7351 | 282 | for (n = 0; n < nmaps; n++) { |
321a9583 | 283 | char *buf; |
f948dd76 | 284 | |
19de7351 DC |
285 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
286 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
ce92464c DW |
287 | error = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, |
288 | BTOBB(byte_cnt), 0, &bp); | |
289 | if (error) | |
c8eac49e | 290 | goto out_trans_cancel; |
f948dd76 DC |
291 | bp->b_ops = &xfs_symlink_buf_ops; |
292 | ||
293 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); | |
321a9583 | 294 | byte_cnt = min(byte_cnt, pathlen); |
19de7351 | 295 | |
f948dd76 DC |
296 | buf = bp->b_addr; |
297 | buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, | |
298 | byte_cnt, bp); | |
299 | ||
300 | memcpy(buf, cur_chunk, byte_cnt); | |
301 | ||
19de7351 | 302 | cur_chunk += byte_cnt; |
f948dd76 DC |
303 | pathlen -= byte_cnt; |
304 | offset += byte_cnt; | |
19de7351 | 305 | |
daf7b799 | 306 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF); |
f948dd76 DC |
307 | xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - |
308 | (char *)bp->b_addr); | |
19de7351 | 309 | } |
321a9583 | 310 | ASSERT(pathlen == 0); |
19de7351 | 311 | } |
13d2c10b | 312 | i_size_write(VFS_I(ip), ip->i_disk_size); |
19de7351 DC |
313 | |
314 | /* | |
315 | * Create the directory entry for the symlink. | |
316 | */ | |
381eee69 | 317 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, resblks); |
19de7351 | 318 | if (error) |
c8eac49e | 319 | goto out_trans_cancel; |
19de7351 DC |
320 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
321 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
322 | ||
323 | /* | |
324 | * If this is a synchronous mount, make sure that the | |
325 | * symlink transaction goes to disk before returning to | |
326 | * the user. | |
327 | */ | |
0560f31a | 328 | if (xfs_has_wsync(mp) || xfs_has_dirsync(mp)) |
19de7351 | 329 | xfs_trans_set_sync(tp); |
19de7351 | 330 | |
70393313 | 331 | error = xfs_trans_commit(tp); |
58c90473 DC |
332 | if (error) |
333 | goto out_release_inode; | |
334 | ||
19de7351 DC |
335 | xfs_qm_dqrele(udqp); |
336 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 337 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
338 | |
339 | *ipp = ip; | |
340 | return 0; | |
341 | ||
58c90473 | 342 | out_trans_cancel: |
4906e215 | 343 | xfs_trans_cancel(tp); |
58c90473 DC |
344 | out_release_inode: |
345 | /* | |
346 | * Wait until after the current transaction is aborted to finish the | |
347 | * setup of the inode and release the inode. This prevents recursive | |
348 | * transactions and deadlocks from xfs_inactive. | |
349 | */ | |
350 | if (ip) { | |
351 | xfs_finish_inode_setup(ip); | |
44a8736b | 352 | xfs_irele(ip); |
58c90473 | 353 | } |
f2f7b9ff | 354 | out_release_dquots: |
19de7351 DC |
355 | xfs_qm_dqrele(udqp); |
356 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 357 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
358 | |
359 | if (unlock_dp_on_error) | |
65523218 | 360 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
19de7351 DC |
361 | return error; |
362 | } | |
363 | ||
364 | /* | |
365 | * Free a symlink that has blocks associated with it. | |
43feeea8 DC |
366 | * |
367 | * Note: zero length symlinks are not allowed to exist. When we set the size to | |
368 | * zero, also change it to a regular file so that it does not get written to | |
369 | * disk as a zero length symlink. The inode is on the unlinked list already, so | |
370 | * userspace cannot find this inode anymore, so this change is not user visible | |
371 | * but allows us to catch corrupt zero-length symlinks in the verifiers. | |
19de7351 | 372 | */ |
725eb1eb | 373 | STATIC int |
19de7351 | 374 | xfs_inactive_symlink_rmt( |
36b21dde | 375 | struct xfs_inode *ip) |
19de7351 | 376 | { |
e8222613 | 377 | struct xfs_buf *bp; |
19de7351 DC |
378 | int done; |
379 | int error; | |
19de7351 DC |
380 | int i; |
381 | xfs_mount_t *mp; | |
382 | xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; | |
383 | int nmaps; | |
19de7351 DC |
384 | int size; |
385 | xfs_trans_t *tp; | |
386 | ||
19de7351 | 387 | mp = ip->i_mount; |
b2197a36 | 388 | ASSERT(!xfs_need_iread_extents(&ip->i_df)); |
19de7351 DC |
389 | /* |
390 | * We're freeing a symlink that has some | |
391 | * blocks allocated to it. Free the | |
392 | * blocks here. We know that we've got | |
393 | * either 1 or 2 extents and that we can | |
394 | * free them all in one bunmapi call. | |
395 | */ | |
daf83964 | 396 | ASSERT(ip->i_df.if_nextents > 0 && ip->i_df.if_nextents <= 2); |
19de7351 | 397 | |
253f4911 CH |
398 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
399 | if (error) | |
36b21dde | 400 | return error; |
36b21dde BF |
401 | |
402 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
403 | xfs_trans_ijoin(tp, ip, 0); | |
404 | ||
19de7351 | 405 | /* |
43feeea8 DC |
406 | * Lock the inode, fix the size, turn it into a regular file and join it |
407 | * to the transaction. Hold it so in the normal path, we still have it | |
408 | * locked for the second transaction. In the error paths we need it | |
19de7351 DC |
409 | * held so the cancel won't rele it, see below. |
410 | */ | |
13d2c10b CH |
411 | size = (int)ip->i_disk_size; |
412 | ip->i_disk_size = 0; | |
43feeea8 | 413 | VFS_I(ip)->i_mode = (VFS_I(ip)->i_mode & ~S_IFMT) | S_IFREG; |
19de7351 DC |
414 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
415 | /* | |
416 | * Find the block(s) so we can inval and unmap them. | |
417 | */ | |
418 | done = 0; | |
19de7351 | 419 | nmaps = ARRAY_SIZE(mval); |
f948dd76 | 420 | error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), |
19de7351 DC |
421 | mval, &nmaps, 0); |
422 | if (error) | |
36b21dde | 423 | goto error_trans_cancel; |
19de7351 | 424 | /* |
f948dd76 | 425 | * Invalidate the block(s). No validation is done. |
19de7351 DC |
426 | */ |
427 | for (i = 0; i < nmaps; i++) { | |
ce92464c DW |
428 | error = xfs_trans_get_buf(tp, mp->m_ddev_targp, |
429 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
430 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0, | |
431 | &bp); | |
432 | if (error) | |
c8eac49e | 433 | goto error_trans_cancel; |
19de7351 DC |
434 | xfs_trans_binval(tp, bp); |
435 | } | |
436 | /* | |
2c3234d1 | 437 | * Unmap the dead block(s) to the dfops. |
19de7351 | 438 | */ |
2af52842 | 439 | error = xfs_bunmapi(tp, ip, 0, size, 0, nmaps, &done); |
36b21dde | 440 | if (error) |
c8eac49e | 441 | goto error_trans_cancel; |
19de7351 | 442 | ASSERT(done); |
3565b660 | 443 | |
19de7351 | 444 | /* |
c8eac49e BF |
445 | * Commit the transaction. This first logs the EFI and the inode, then |
446 | * rolls and commits the transaction that frees the extents. | |
19de7351 | 447 | */ |
3565b660 | 448 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
70393313 | 449 | error = xfs_trans_commit(tp); |
19de7351 | 450 | if (error) { |
75c8c50f | 451 | ASSERT(xfs_is_shutdown(mp)); |
36b21dde | 452 | goto error_unlock; |
19de7351 | 453 | } |
19de7351 DC |
454 | |
455 | /* | |
456 | * Remove the memory for extent descriptions (just bookkeeping). | |
457 | */ | |
458 | if (ip->i_df.if_bytes) | |
459 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
460 | ASSERT(ip->i_df.if_bytes == 0); | |
19de7351 | 461 | |
36b21dde | 462 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
19de7351 DC |
463 | return 0; |
464 | ||
36b21dde | 465 | error_trans_cancel: |
4906e215 | 466 | xfs_trans_cancel(tp); |
36b21dde BF |
467 | error_unlock: |
468 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
19de7351 DC |
469 | return error; |
470 | } | |
725eb1eb MT |
471 | |
472 | /* | |
473 | * xfs_inactive_symlink - free a symlink | |
474 | */ | |
475 | int | |
476 | xfs_inactive_symlink( | |
36b21dde | 477 | struct xfs_inode *ip) |
725eb1eb MT |
478 | { |
479 | struct xfs_mount *mp = ip->i_mount; | |
480 | int pathlen; | |
481 | ||
482 | trace_xfs_inactive_symlink(ip); | |
483 | ||
75c8c50f | 484 | if (xfs_is_shutdown(mp)) |
2451337d | 485 | return -EIO; |
725eb1eb | 486 | |
36b21dde | 487 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
13d2c10b | 488 | pathlen = (int)ip->i_disk_size; |
43feeea8 | 489 | ASSERT(pathlen); |
725eb1eb | 490 | |
43feeea8 | 491 | if (pathlen <= 0 || pathlen > XFS_SYMLINK_MAXLEN) { |
725eb1eb MT |
492 | xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", |
493 | __func__, (unsigned long long)ip->i_ino, pathlen); | |
36b21dde | 494 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb | 495 | ASSERT(0); |
2451337d | 496 | return -EFSCORRUPTED; |
725eb1eb MT |
497 | } |
498 | ||
43feeea8 DC |
499 | /* |
500 | * Inline fork state gets removed by xfs_difree() so we have nothing to | |
501 | * do here in that case. | |
502 | */ | |
0779f4a6 | 503 | if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) { |
36b21dde | 504 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb MT |
505 | return 0; |
506 | } | |
507 | ||
36b21dde BF |
508 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
509 | ||
725eb1eb | 510 | /* remove the remote symlink */ |
36b21dde | 511 | return xfs_inactive_symlink_rmt(ip); |
725eb1eb | 512 | } |