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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" |
19de7351 DC |
25 | |
26 | /* ----- Kernel only functions below ----- */ | |
5da8f2f8 DW |
27 | int |
28 | xfs_readlink_bmap_ilocked( | |
f948dd76 DC |
29 | struct xfs_inode *ip, |
30 | char *link) | |
19de7351 | 31 | { |
f948dd76 DC |
32 | struct xfs_mount *mp = ip->i_mount; |
33 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; | |
34 | struct xfs_buf *bp; | |
35 | xfs_daddr_t d; | |
36 | char *cur_chunk; | |
13d2c10b | 37 | int pathlen = ip->i_disk_size; |
f948dd76 DC |
38 | int nmaps = XFS_SYMLINK_MAPS; |
39 | int byte_cnt; | |
40 | int n; | |
41 | int error = 0; | |
42 | int fsblocks = 0; | |
43 | int offset; | |
19de7351 | 44 | |
29db2500 CH |
45 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); |
46 | ||
f948dd76 DC |
47 | fsblocks = xfs_symlink_blocks(mp, pathlen); |
48 | error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0); | |
19de7351 DC |
49 | if (error) |
50 | goto out; | |
51 | ||
f948dd76 | 52 | offset = 0; |
19de7351 DC |
53 | for (n = 0; n < nmaps; n++) { |
54 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
55 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
56 | ||
0e3eccce DW |
57 | error = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, |
58 | &bp, &xfs_symlink_buf_ops); | |
59 | if (error) | |
60 | return error; | |
f948dd76 | 61 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); |
19de7351 DC |
62 | if (pathlen < byte_cnt) |
63 | byte_cnt = pathlen; | |
f948dd76 DC |
64 | |
65 | cur_chunk = bp->b_addr; | |
38c26bfd | 66 | if (xfs_has_crc(mp)) { |
bda65ef8 | 67 | if (!xfs_symlink_hdr_ok(ip->i_ino, offset, |
f948dd76 | 68 | byte_cnt, bp)) { |
2451337d | 69 | error = -EFSCORRUPTED; |
f948dd76 DC |
70 | xfs_alert(mp, |
71 | "symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)", | |
72 | offset, byte_cnt, ip->i_ino); | |
73 | xfs_buf_relse(bp); | |
74 | goto out; | |
75 | ||
76 | } | |
77 | ||
78 | cur_chunk += sizeof(struct xfs_dsymlink_hdr); | |
79 | } | |
80 | ||
2ac56d3d | 81 | memcpy(link + offset, cur_chunk, byte_cnt); |
f948dd76 | 82 | |
19de7351 | 83 | pathlen -= byte_cnt; |
f948dd76 | 84 | offset += byte_cnt; |
19de7351 | 85 | |
19de7351 DC |
86 | xfs_buf_relse(bp); |
87 | } | |
f948dd76 | 88 | ASSERT(pathlen == 0); |
19de7351 | 89 | |
13d2c10b | 90 | link[ip->i_disk_size] = '\0'; |
19de7351 DC |
91 | error = 0; |
92 | ||
93 | out: | |
94 | return error; | |
95 | } | |
96 | ||
97 | int | |
98 | xfs_readlink( | |
f948dd76 | 99 | struct xfs_inode *ip, |
19de7351 DC |
100 | char *link) |
101 | { | |
f948dd76 | 102 | struct xfs_mount *mp = ip->i_mount; |
19de7351 DC |
103 | xfs_fsize_t pathlen; |
104 | int error = 0; | |
105 | ||
106 | trace_xfs_readlink(ip); | |
107 | ||
0779f4a6 | 108 | ASSERT(ip->i_df.if_format != XFS_DINODE_FMT_LOCAL); |
30ee052e | 109 | |
75c8c50f | 110 | if (xfs_is_shutdown(mp)) |
2451337d | 111 | return -EIO; |
19de7351 DC |
112 | |
113 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
114 | ||
13d2c10b | 115 | pathlen = ip->i_disk_size; |
19de7351 DC |
116 | if (!pathlen) |
117 | goto out; | |
118 | ||
6eb0b8df | 119 | if (pathlen < 0 || pathlen > XFS_SYMLINK_MAXLEN) { |
19de7351 DC |
120 | xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)", |
121 | __func__, (unsigned long long) ip->i_ino, | |
122 | (long long) pathlen); | |
123 | ASSERT(0); | |
2451337d | 124 | error = -EFSCORRUPTED; |
19de7351 DC |
125 | goto out; |
126 | } | |
127 | ||
128 | ||
5da8f2f8 | 129 | error = xfs_readlink_bmap_ilocked(ip, link); |
19de7351 DC |
130 | |
131 | out: | |
132 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
133 | return error; | |
134 | } | |
135 | ||
136 | int | |
137 | xfs_symlink( | |
f736d93d | 138 | struct user_namespace *mnt_userns, |
f948dd76 | 139 | struct xfs_inode *dp, |
19de7351 DC |
140 | struct xfs_name *link_name, |
141 | const char *target_path, | |
142 | umode_t mode, | |
f948dd76 | 143 | struct xfs_inode **ipp) |
19de7351 | 144 | { |
f948dd76 DC |
145 | struct xfs_mount *mp = dp->i_mount; |
146 | struct xfs_trans *tp = NULL; | |
147 | struct xfs_inode *ip = NULL; | |
148 | int error = 0; | |
19de7351 | 149 | int pathlen; |
58c90473 | 150 | bool unlock_dp_on_error = false; |
19de7351 DC |
151 | xfs_fileoff_t first_fsb; |
152 | xfs_filblks_t fs_blocks; | |
153 | int nmaps; | |
f948dd76 | 154 | struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; |
19de7351 DC |
155 | xfs_daddr_t d; |
156 | const char *cur_chunk; | |
157 | int byte_cnt; | |
158 | int n; | |
e8222613 | 159 | struct xfs_buf *bp; |
19de7351 | 160 | prid_t prid; |
113a5683 CS |
161 | struct xfs_dquot *udqp = NULL; |
162 | struct xfs_dquot *gdqp = NULL; | |
92f8ff73 | 163 | struct xfs_dquot *pdqp = NULL; |
19de7351 | 164 | uint resblks; |
b652afd9 | 165 | xfs_ino_t ino; |
19de7351 DC |
166 | |
167 | *ipp = NULL; | |
19de7351 DC |
168 | |
169 | trace_xfs_symlink(dp, link_name); | |
170 | ||
75c8c50f | 171 | if (xfs_is_shutdown(mp)) |
2451337d | 172 | return -EIO; |
19de7351 DC |
173 | |
174 | /* | |
175 | * Check component lengths of the target path name. | |
176 | */ | |
177 | pathlen = strlen(target_path); | |
6eb0b8df | 178 | if (pathlen >= XFS_SYMLINK_MAXLEN) /* total string too long */ |
2451337d | 179 | return -ENAMETOOLONG; |
43feeea8 | 180 | ASSERT(pathlen > 0); |
19de7351 | 181 | |
163467d3 | 182 | prid = xfs_get_initial_prid(dp); |
19de7351 DC |
183 | |
184 | /* | |
185 | * Make sure that we have allocated dquot(s) on disk. | |
186 | */ | |
a65e58e7 CB |
187 | error = xfs_qm_vop_dqalloc(dp, mapped_fsuid(mnt_userns), |
188 | mapped_fsgid(mnt_userns), prid, | |
7aab1b28 DE |
189 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, |
190 | &udqp, &gdqp, &pdqp); | |
19de7351 | 191 | if (error) |
58c90473 | 192 | return error; |
19de7351 | 193 | |
19de7351 DC |
194 | /* |
195 | * The symlink will fit into the inode data fork? | |
196 | * There can't be any attributes so we get the whole variable part. | |
197 | */ | |
e9e2eae8 | 198 | if (pathlen <= XFS_LITINO(mp)) |
19de7351 DC |
199 | fs_blocks = 0; |
200 | else | |
321a9583 | 201 | fs_blocks = xfs_symlink_blocks(mp, pathlen); |
19de7351 | 202 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
253f4911 | 203 | |
f2f7b9ff DW |
204 | error = xfs_trans_alloc_icreate(mp, &M_RES(mp)->tr_symlink, udqp, gdqp, |
205 | pdqp, resblks, &tp); | |
4906e215 | 206 | if (error) |
f2f7b9ff | 207 | goto out_release_dquots; |
19de7351 | 208 | |
65523218 | 209 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
19de7351 DC |
210 | unlock_dp_on_error = true; |
211 | ||
212 | /* | |
213 | * Check whether the directory allows new symlinks or not. | |
214 | */ | |
db07349d | 215 | if (dp->i_diflags & XFS_DIFLAG_NOSYMLINKS) { |
2451337d | 216 | error = -EPERM; |
58c90473 | 217 | goto out_trans_cancel; |
19de7351 DC |
218 | } |
219 | ||
f5d92749 CB |
220 | error = xfs_iext_count_may_overflow(dp, XFS_DATA_FORK, |
221 | XFS_IEXT_DIR_MANIP_CNT(mp)); | |
222 | if (error) | |
58c90473 | 223 | goto out_trans_cancel; |
19de7351 | 224 | |
19de7351 DC |
225 | /* |
226 | * Allocate an inode for the symlink. | |
227 | */ | |
b652afd9 DC |
228 | error = xfs_dialloc(&tp, dp->i_ino, S_IFLNK, &ino); |
229 | if (!error) | |
230 | error = xfs_init_new_inode(mnt_userns, tp, dp, ino, | |
231 | S_IFLNK | (mode & ~S_IFMT), 1, 0, prid, | |
232 | false, &ip); | |
58c90473 DC |
233 | if (error) |
234 | goto out_trans_cancel; | |
19de7351 DC |
235 | |
236 | /* | |
58c90473 DC |
237 | * Now we join the directory inode to the transaction. We do not do it |
238 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
239 | * (and release all the locks). An error from here on will result in | |
240 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
19de7351 DC |
241 | * error path. |
242 | */ | |
65523218 | 243 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
19de7351 DC |
244 | unlock_dp_on_error = false; |
245 | ||
246 | /* | |
247 | * Also attach the dquot(s) to it, if applicable. | |
248 | */ | |
92f8ff73 | 249 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); |
19de7351 | 250 | |
57fd2d8f | 251 | resblks -= XFS_IALLOC_SPACE_RES(mp); |
19de7351 DC |
252 | /* |
253 | * If the symlink will fit into the inode, write it inline. | |
254 | */ | |
255 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
143f4aed | 256 | xfs_init_local_fork(ip, XFS_DATA_FORK, target_path, pathlen); |
19de7351 | 257 | |
13d2c10b | 258 | ip->i_disk_size = pathlen; |
f7e67b20 | 259 | ip->i_df.if_format = XFS_DINODE_FMT_LOCAL; |
19de7351 | 260 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); |
19de7351 | 261 | } else { |
f948dd76 DC |
262 | int offset; |
263 | ||
19de7351 DC |
264 | first_fsb = 0; |
265 | nmaps = XFS_SYMLINK_MAPS; | |
266 | ||
267 | error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks, | |
a7beabea | 268 | XFS_BMAPI_METADATA, resblks, mval, &nmaps); |
19de7351 | 269 | if (error) |
c8eac49e | 270 | goto out_trans_cancel; |
19de7351 | 271 | |
57fd2d8f | 272 | resblks -= fs_blocks; |
13d2c10b | 273 | ip->i_disk_size = pathlen; |
19de7351 DC |
274 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
275 | ||
276 | cur_chunk = target_path; | |
f948dd76 | 277 | offset = 0; |
19de7351 | 278 | for (n = 0; n < nmaps; n++) { |
321a9583 | 279 | char *buf; |
f948dd76 | 280 | |
19de7351 DC |
281 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
282 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
ce92464c DW |
283 | error = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, |
284 | BTOBB(byte_cnt), 0, &bp); | |
285 | if (error) | |
c8eac49e | 286 | goto out_trans_cancel; |
f948dd76 DC |
287 | bp->b_ops = &xfs_symlink_buf_ops; |
288 | ||
289 | byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); | |
321a9583 | 290 | byte_cnt = min(byte_cnt, pathlen); |
19de7351 | 291 | |
f948dd76 DC |
292 | buf = bp->b_addr; |
293 | buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, | |
294 | byte_cnt, bp); | |
295 | ||
296 | memcpy(buf, cur_chunk, byte_cnt); | |
297 | ||
19de7351 | 298 | cur_chunk += byte_cnt; |
f948dd76 DC |
299 | pathlen -= byte_cnt; |
300 | offset += byte_cnt; | |
19de7351 | 301 | |
daf7b799 | 302 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF); |
f948dd76 DC |
303 | xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - |
304 | (char *)bp->b_addr); | |
19de7351 | 305 | } |
321a9583 | 306 | ASSERT(pathlen == 0); |
19de7351 | 307 | } |
13d2c10b | 308 | i_size_write(VFS_I(ip), ip->i_disk_size); |
19de7351 DC |
309 | |
310 | /* | |
311 | * Create the directory entry for the symlink. | |
312 | */ | |
381eee69 | 313 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, resblks); |
19de7351 | 314 | if (error) |
c8eac49e | 315 | goto out_trans_cancel; |
19de7351 DC |
316 | xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
317 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
318 | ||
319 | /* | |
320 | * If this is a synchronous mount, make sure that the | |
321 | * symlink transaction goes to disk before returning to | |
322 | * the user. | |
323 | */ | |
0560f31a | 324 | if (xfs_has_wsync(mp) || xfs_has_dirsync(mp)) |
19de7351 | 325 | xfs_trans_set_sync(tp); |
19de7351 | 326 | |
70393313 | 327 | error = xfs_trans_commit(tp); |
58c90473 DC |
328 | if (error) |
329 | goto out_release_inode; | |
330 | ||
19de7351 DC |
331 | xfs_qm_dqrele(udqp); |
332 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 333 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
334 | |
335 | *ipp = ip; | |
336 | return 0; | |
337 | ||
58c90473 | 338 | out_trans_cancel: |
4906e215 | 339 | xfs_trans_cancel(tp); |
58c90473 DC |
340 | out_release_inode: |
341 | /* | |
342 | * Wait until after the current transaction is aborted to finish the | |
343 | * setup of the inode and release the inode. This prevents recursive | |
344 | * transactions and deadlocks from xfs_inactive. | |
345 | */ | |
346 | if (ip) { | |
347 | xfs_finish_inode_setup(ip); | |
44a8736b | 348 | xfs_irele(ip); |
58c90473 | 349 | } |
f2f7b9ff | 350 | out_release_dquots: |
19de7351 DC |
351 | xfs_qm_dqrele(udqp); |
352 | xfs_qm_dqrele(gdqp); | |
92f8ff73 | 353 | xfs_qm_dqrele(pdqp); |
19de7351 DC |
354 | |
355 | if (unlock_dp_on_error) | |
65523218 | 356 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
19de7351 DC |
357 | return error; |
358 | } | |
359 | ||
360 | /* | |
361 | * Free a symlink that has blocks associated with it. | |
43feeea8 DC |
362 | * |
363 | * Note: zero length symlinks are not allowed to exist. When we set the size to | |
364 | * zero, also change it to a regular file so that it does not get written to | |
365 | * disk as a zero length symlink. The inode is on the unlinked list already, so | |
366 | * userspace cannot find this inode anymore, so this change is not user visible | |
367 | * but allows us to catch corrupt zero-length symlinks in the verifiers. | |
19de7351 | 368 | */ |
725eb1eb | 369 | STATIC int |
19de7351 | 370 | xfs_inactive_symlink_rmt( |
36b21dde | 371 | struct xfs_inode *ip) |
19de7351 | 372 | { |
e8222613 | 373 | struct xfs_buf *bp; |
19de7351 DC |
374 | int done; |
375 | int error; | |
19de7351 DC |
376 | int i; |
377 | xfs_mount_t *mp; | |
378 | xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; | |
379 | int nmaps; | |
19de7351 DC |
380 | int size; |
381 | xfs_trans_t *tp; | |
382 | ||
19de7351 | 383 | mp = ip->i_mount; |
b2197a36 | 384 | ASSERT(!xfs_need_iread_extents(&ip->i_df)); |
19de7351 DC |
385 | /* |
386 | * We're freeing a symlink that has some | |
387 | * blocks allocated to it. Free the | |
388 | * blocks here. We know that we've got | |
389 | * either 1 or 2 extents and that we can | |
390 | * free them all in one bunmapi call. | |
391 | */ | |
daf83964 | 392 | ASSERT(ip->i_df.if_nextents > 0 && ip->i_df.if_nextents <= 2); |
19de7351 | 393 | |
253f4911 CH |
394 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
395 | if (error) | |
36b21dde | 396 | return error; |
36b21dde BF |
397 | |
398 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
399 | xfs_trans_ijoin(tp, ip, 0); | |
400 | ||
19de7351 | 401 | /* |
43feeea8 DC |
402 | * Lock the inode, fix the size, turn it into a regular file and join it |
403 | * to the transaction. Hold it so in the normal path, we still have it | |
404 | * locked for the second transaction. In the error paths we need it | |
19de7351 DC |
405 | * held so the cancel won't rele it, see below. |
406 | */ | |
13d2c10b CH |
407 | size = (int)ip->i_disk_size; |
408 | ip->i_disk_size = 0; | |
43feeea8 | 409 | VFS_I(ip)->i_mode = (VFS_I(ip)->i_mode & ~S_IFMT) | S_IFREG; |
19de7351 DC |
410 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
411 | /* | |
412 | * Find the block(s) so we can inval and unmap them. | |
413 | */ | |
414 | done = 0; | |
19de7351 | 415 | nmaps = ARRAY_SIZE(mval); |
f948dd76 | 416 | error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), |
19de7351 DC |
417 | mval, &nmaps, 0); |
418 | if (error) | |
36b21dde | 419 | goto error_trans_cancel; |
19de7351 | 420 | /* |
f948dd76 | 421 | * Invalidate the block(s). No validation is done. |
19de7351 DC |
422 | */ |
423 | for (i = 0; i < nmaps; i++) { | |
ce92464c DW |
424 | error = xfs_trans_get_buf(tp, mp->m_ddev_targp, |
425 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
426 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0, | |
427 | &bp); | |
428 | if (error) | |
c8eac49e | 429 | goto error_trans_cancel; |
19de7351 DC |
430 | xfs_trans_binval(tp, bp); |
431 | } | |
432 | /* | |
2c3234d1 | 433 | * Unmap the dead block(s) to the dfops. |
19de7351 | 434 | */ |
2af52842 | 435 | error = xfs_bunmapi(tp, ip, 0, size, 0, nmaps, &done); |
36b21dde | 436 | if (error) |
c8eac49e | 437 | goto error_trans_cancel; |
19de7351 | 438 | ASSERT(done); |
3565b660 | 439 | |
19de7351 | 440 | /* |
c8eac49e BF |
441 | * Commit the transaction. This first logs the EFI and the inode, then |
442 | * rolls and commits the transaction that frees the extents. | |
19de7351 | 443 | */ |
3565b660 | 444 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
70393313 | 445 | error = xfs_trans_commit(tp); |
19de7351 | 446 | if (error) { |
75c8c50f | 447 | ASSERT(xfs_is_shutdown(mp)); |
36b21dde | 448 | goto error_unlock; |
19de7351 | 449 | } |
19de7351 DC |
450 | |
451 | /* | |
452 | * Remove the memory for extent descriptions (just bookkeeping). | |
453 | */ | |
454 | if (ip->i_df.if_bytes) | |
455 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
456 | ASSERT(ip->i_df.if_bytes == 0); | |
19de7351 | 457 | |
36b21dde | 458 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
19de7351 DC |
459 | return 0; |
460 | ||
36b21dde | 461 | error_trans_cancel: |
4906e215 | 462 | xfs_trans_cancel(tp); |
36b21dde BF |
463 | error_unlock: |
464 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
19de7351 DC |
465 | return error; |
466 | } | |
725eb1eb MT |
467 | |
468 | /* | |
469 | * xfs_inactive_symlink - free a symlink | |
470 | */ | |
471 | int | |
472 | xfs_inactive_symlink( | |
36b21dde | 473 | struct xfs_inode *ip) |
725eb1eb MT |
474 | { |
475 | struct xfs_mount *mp = ip->i_mount; | |
476 | int pathlen; | |
477 | ||
478 | trace_xfs_inactive_symlink(ip); | |
479 | ||
75c8c50f | 480 | if (xfs_is_shutdown(mp)) |
2451337d | 481 | return -EIO; |
725eb1eb | 482 | |
36b21dde | 483 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
13d2c10b | 484 | pathlen = (int)ip->i_disk_size; |
43feeea8 | 485 | ASSERT(pathlen); |
725eb1eb | 486 | |
43feeea8 | 487 | if (pathlen <= 0 || pathlen > XFS_SYMLINK_MAXLEN) { |
725eb1eb MT |
488 | xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", |
489 | __func__, (unsigned long long)ip->i_ino, pathlen); | |
36b21dde | 490 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb | 491 | ASSERT(0); |
2451337d | 492 | return -EFSCORRUPTED; |
725eb1eb MT |
493 | } |
494 | ||
43feeea8 DC |
495 | /* |
496 | * Inline fork state gets removed by xfs_difree() so we have nothing to | |
497 | * do here in that case. | |
498 | */ | |
0779f4a6 | 499 | if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) { |
36b21dde | 500 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
725eb1eb MT |
501 | return 0; |
502 | } | |
503 | ||
36b21dde BF |
504 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
505 | ||
725eb1eb | 506 | /* remove the remote symlink */ |
36b21dde | 507 | return xfs_inactive_symlink_rmt(ip); |
725eb1eb | 508 | } |