Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
16f7e0fe | 18 | |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
1da177e4 | 21 | #include "xfs_types.h" |
a844f451 | 22 | #include "xfs_bit.h" |
1da177e4 | 23 | #include "xfs_log.h" |
a844f451 | 24 | #include "xfs_inum.h" |
1da177e4 LT |
25 | #include "xfs_trans.h" |
26 | #include "xfs_sb.h" | |
27 | #include "xfs_ag.h" | |
1da177e4 LT |
28 | #include "xfs_dir2.h" |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_mount.h" | |
a844f451 | 31 | #include "xfs_da_btree.h" |
1da177e4 | 32 | #include "xfs_bmap_btree.h" |
a844f451 | 33 | #include "xfs_alloc_btree.h" |
1da177e4 | 34 | #include "xfs_ialloc_btree.h" |
1da177e4 | 35 | #include "xfs_dir2_sf.h" |
a844f451 | 36 | #include "xfs_attr_sf.h" |
1da177e4 | 37 | #include "xfs_dinode.h" |
1da177e4 | 38 | #include "xfs_inode.h" |
a844f451 | 39 | #include "xfs_inode_item.h" |
a844f451 NS |
40 | #include "xfs_itable.h" |
41 | #include "xfs_btree.h" | |
42 | #include "xfs_ialloc.h" | |
43 | #include "xfs_alloc.h" | |
1da177e4 | 44 | #include "xfs_bmap.h" |
1da177e4 LT |
45 | #include "xfs_attr.h" |
46 | #include "xfs_rw.h" | |
1da177e4 | 47 | #include "xfs_error.h" |
1da177e4 LT |
48 | #include "xfs_quota.h" |
49 | #include "xfs_utils.h" | |
a844f451 | 50 | #include "xfs_rtalloc.h" |
1da177e4 | 51 | #include "xfs_trans_space.h" |
1da177e4 | 52 | #include "xfs_log_priv.h" |
2a82b8be | 53 | #include "xfs_filestream.h" |
993386c1 | 54 | #include "xfs_vnodeops.h" |
1da177e4 | 55 | |
993386c1 | 56 | int |
1da177e4 | 57 | xfs_open( |
993386c1 | 58 | xfs_inode_t *ip) |
1da177e4 LT |
59 | { |
60 | int mode; | |
1da177e4 LT |
61 | |
62 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) | |
63 | return XFS_ERROR(EIO); | |
64 | ||
65 | /* | |
66 | * If it's a directory with any blocks, read-ahead block 0 | |
67 | * as we're almost certain to have the next operation be a read there. | |
68 | */ | |
993386c1 | 69 | if (S_ISDIR(ip->i_d.di_mode) && ip->i_d.di_nextents > 0) { |
1da177e4 LT |
70 | mode = xfs_ilock_map_shared(ip); |
71 | if (ip->i_d.di_nextents > 0) | |
72 | (void)xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK); | |
73 | xfs_iunlock(ip, mode); | |
74 | } | |
75 | return 0; | |
76 | } | |
77 | ||
1da177e4 LT |
78 | int |
79 | xfs_setattr( | |
0f285c8a CH |
80 | struct xfs_inode *ip, |
81 | struct iattr *iattr, | |
1da177e4 LT |
82 | int flags, |
83 | cred_t *credp) | |
84 | { | |
993386c1 | 85 | xfs_mount_t *mp = ip->i_mount; |
e4f75291 | 86 | struct inode *inode = VFS_I(ip); |
0f285c8a | 87 | int mask = iattr->ia_valid; |
1da177e4 | 88 | xfs_trans_t *tp; |
1da177e4 LT |
89 | int code; |
90 | uint lock_flags; | |
91 | uint commit_flags=0; | |
92 | uid_t uid=0, iuid=0; | |
93 | gid_t gid=0, igid=0; | |
94 | int timeflags = 0; | |
1da177e4 LT |
95 | struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2; |
96 | int file_owner; | |
5fcbab35 | 97 | int need_iolock = 1; |
1da177e4 | 98 | |
cf441eeb | 99 | xfs_itrace_entry(ip); |
1da177e4 | 100 | |
bd186aa9 | 101 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
102 | return XFS_ERROR(EROFS); |
103 | ||
1da177e4 LT |
104 | if (XFS_FORCED_SHUTDOWN(mp)) |
105 | return XFS_ERROR(EIO); | |
106 | ||
1da177e4 LT |
107 | olddquot1 = olddquot2 = NULL; |
108 | udqp = gdqp = NULL; | |
109 | ||
110 | /* | |
111 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
112 | * before we start any other transactions. Trying to do this later | |
113 | * is messy. We don't care to take a readlock to look at the ids | |
114 | * in inode here, because we can't hold it across the trans_reserve. | |
115 | * If the IDs do change before we take the ilock, we're covered | |
116 | * because the i_*dquot fields will get updated anyway. | |
117 | */ | |
0f285c8a | 118 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { |
1da177e4 LT |
119 | uint qflags = 0; |
120 | ||
0f285c8a CH |
121 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { |
122 | uid = iattr->ia_uid; | |
1da177e4 LT |
123 | qflags |= XFS_QMOPT_UQUOTA; |
124 | } else { | |
125 | uid = ip->i_d.di_uid; | |
126 | } | |
0f285c8a CH |
127 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { |
128 | gid = iattr->ia_gid; | |
1da177e4 LT |
129 | qflags |= XFS_QMOPT_GQUOTA; |
130 | } else { | |
131 | gid = ip->i_d.di_gid; | |
132 | } | |
25fe55e8 | 133 | |
1da177e4 LT |
134 | /* |
135 | * We take a reference when we initialize udqp and gdqp, | |
136 | * so it is important that we never blindly double trip on | |
137 | * the same variable. See xfs_create() for an example. | |
138 | */ | |
139 | ASSERT(udqp == NULL); | |
140 | ASSERT(gdqp == NULL); | |
25fe55e8 CH |
141 | code = XFS_QM_DQVOPALLOC(mp, ip, uid, gid, ip->i_d.di_projid, |
142 | qflags, &udqp, &gdqp); | |
1da177e4 | 143 | if (code) |
014c2544 | 144 | return code; |
1da177e4 LT |
145 | } |
146 | ||
147 | /* | |
148 | * For the other attributes, we acquire the inode lock and | |
149 | * first do an error checking pass. | |
150 | */ | |
151 | tp = NULL; | |
152 | lock_flags = XFS_ILOCK_EXCL; | |
0f285c8a | 153 | if (flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 154 | need_iolock = 0; |
0f285c8a CH |
155 | if (!(mask & ATTR_SIZE)) { |
156 | if ((mask != (ATTR_CTIME|ATTR_ATIME|ATTR_MTIME)) || | |
1da177e4 LT |
157 | (mp->m_flags & XFS_MOUNT_WSYNC)) { |
158 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); | |
159 | commit_flags = 0; | |
160 | if ((code = xfs_trans_reserve(tp, 0, | |
161 | XFS_ICHANGE_LOG_RES(mp), 0, | |
162 | 0, 0))) { | |
163 | lock_flags = 0; | |
164 | goto error_return; | |
165 | } | |
166 | } | |
167 | } else { | |
eb9df39d | 168 | if (DM_EVENT_ENABLED(ip, DM_EVENT_TRUNCATE) && |
0f285c8a | 169 | !(flags & XFS_ATTR_DMI)) { |
1da177e4 | 170 | int dmflags = AT_DELAY_FLAG(flags) | DM_SEM_FLAG_WR; |
bc4ac74a | 171 | code = XFS_SEND_DATA(mp, DM_EVENT_TRUNCATE, ip, |
0f285c8a | 172 | iattr->ia_size, 0, dmflags, NULL); |
1da177e4 LT |
173 | if (code) { |
174 | lock_flags = 0; | |
175 | goto error_return; | |
176 | } | |
177 | } | |
178 | if (need_iolock) | |
179 | lock_flags |= XFS_IOLOCK_EXCL; | |
180 | } | |
181 | ||
182 | xfs_ilock(ip, lock_flags); | |
183 | ||
184 | /* boolean: are we the file owner? */ | |
185 | file_owner = (current_fsuid(credp) == ip->i_d.di_uid); | |
186 | ||
187 | /* | |
188 | * Change various properties of a file. | |
189 | * Only the owner or users with CAP_FOWNER | |
190 | * capability may do these things. | |
191 | */ | |
0f285c8a | 192 | if (mask & (ATTR_MODE|ATTR_UID|ATTR_GID)) { |
1da177e4 LT |
193 | /* |
194 | * CAP_FOWNER overrides the following restrictions: | |
195 | * | |
196 | * The user ID of the calling process must be equal | |
197 | * to the file owner ID, except in cases where the | |
198 | * CAP_FSETID capability is applicable. | |
199 | */ | |
200 | if (!file_owner && !capable(CAP_FOWNER)) { | |
201 | code = XFS_ERROR(EPERM); | |
202 | goto error_return; | |
203 | } | |
204 | ||
205 | /* | |
206 | * CAP_FSETID overrides the following restrictions: | |
207 | * | |
208 | * The effective user ID of the calling process shall match | |
209 | * the file owner when setting the set-user-ID and | |
210 | * set-group-ID bits on that file. | |
211 | * | |
212 | * The effective group ID or one of the supplementary group | |
213 | * IDs of the calling process shall match the group owner of | |
214 | * the file when setting the set-group-ID bit on that file | |
215 | */ | |
0f285c8a | 216 | if (mask & ATTR_MODE) { |
1da177e4 LT |
217 | mode_t m = 0; |
218 | ||
0f285c8a | 219 | if ((iattr->ia_mode & S_ISUID) && !file_owner) |
1da177e4 | 220 | m |= S_ISUID; |
0f285c8a | 221 | if ((iattr->ia_mode & S_ISGID) && |
1da177e4 LT |
222 | !in_group_p((gid_t)ip->i_d.di_gid)) |
223 | m |= S_ISGID; | |
224 | #if 0 | |
225 | /* Linux allows this, Irix doesn't. */ | |
0f285c8a | 226 | if ((iattr->ia_mode & S_ISVTX) && !S_ISDIR(ip->i_d.di_mode)) |
1da177e4 LT |
227 | m |= S_ISVTX; |
228 | #endif | |
229 | if (m && !capable(CAP_FSETID)) | |
0f285c8a | 230 | iattr->ia_mode &= ~m; |
1da177e4 LT |
231 | } |
232 | } | |
233 | ||
234 | /* | |
235 | * Change file ownership. Must be the owner or privileged. | |
236 | * If the system was configured with the "restricted_chown" | |
237 | * option, the owner is not permitted to give away the file, | |
238 | * and can change the group id only to a group of which he | |
239 | * or she is a member. | |
240 | */ | |
0f285c8a | 241 | if (mask & (ATTR_UID|ATTR_GID)) { |
1da177e4 LT |
242 | /* |
243 | * These IDs could have changed since we last looked at them. | |
244 | * But, we're assured that if the ownership did change | |
245 | * while we didn't have the inode locked, inode's dquot(s) | |
246 | * would have changed also. | |
247 | */ | |
248 | iuid = ip->i_d.di_uid; | |
1da177e4 | 249 | igid = ip->i_d.di_gid; |
0f285c8a CH |
250 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
251 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
1da177e4 LT |
252 | |
253 | /* | |
254 | * CAP_CHOWN overrides the following restrictions: | |
255 | * | |
256 | * If _POSIX_CHOWN_RESTRICTED is defined, this capability | |
257 | * shall override the restriction that a process cannot | |
258 | * change the user ID of a file it owns and the restriction | |
259 | * that the group ID supplied to the chown() function | |
260 | * shall be equal to either the group ID or one of the | |
261 | * supplementary group IDs of the calling process. | |
1da177e4 LT |
262 | */ |
263 | if (restricted_chown && | |
264 | (iuid != uid || (igid != gid && | |
265 | !in_group_p((gid_t)gid))) && | |
266 | !capable(CAP_CHOWN)) { | |
267 | code = XFS_ERROR(EPERM); | |
268 | goto error_return; | |
269 | } | |
270 | /* | |
25fe55e8 | 271 | * Do a quota reservation only if uid/gid is actually |
1da177e4 LT |
272 | * going to change. |
273 | */ | |
274 | if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) || | |
275 | (XFS_IS_GQUOTA_ON(mp) && igid != gid)) { | |
276 | ASSERT(tp); | |
277 | code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp, | |
278 | capable(CAP_FOWNER) ? | |
279 | XFS_QMOPT_FORCE_RES : 0); | |
280 | if (code) /* out of quota */ | |
281 | goto error_return; | |
282 | } | |
283 | } | |
284 | ||
285 | /* | |
286 | * Truncate file. Must have write permission and not be a directory. | |
287 | */ | |
0f285c8a | 288 | if (mask & ATTR_SIZE) { |
1da177e4 | 289 | /* Short circuit the truncate case for zero length files */ |
0f285c8a CH |
290 | if (iattr->ia_size == 0 && |
291 | ip->i_size == 0 && ip->i_d.di_nextents == 0) { | |
1da177e4 LT |
292 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
293 | lock_flags &= ~XFS_ILOCK_EXCL; | |
0f285c8a | 294 | if (mask & ATTR_CTIME) |
1da177e4 LT |
295 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
296 | code = 0; | |
297 | goto error_return; | |
298 | } | |
299 | ||
42173f68 | 300 | if (S_ISDIR(ip->i_d.di_mode)) { |
1da177e4 LT |
301 | code = XFS_ERROR(EISDIR); |
302 | goto error_return; | |
42173f68 | 303 | } else if (!S_ISREG(ip->i_d.di_mode)) { |
1da177e4 LT |
304 | code = XFS_ERROR(EINVAL); |
305 | goto error_return; | |
306 | } | |
307 | /* | |
308 | * Make sure that the dquots are attached to the inode. | |
309 | */ | |
310 | if ((code = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED))) | |
311 | goto error_return; | |
312 | } | |
313 | ||
314 | /* | |
315 | * Change file access or modified times. | |
316 | */ | |
0f285c8a | 317 | if (mask & (ATTR_ATIME|ATTR_MTIME)) { |
1da177e4 | 318 | if (!file_owner) { |
0f285c8a | 319 | if ((mask & (ATTR_MTIME_SET|ATTR_ATIME_SET)) && |
1da177e4 LT |
320 | !capable(CAP_FOWNER)) { |
321 | code = XFS_ERROR(EPERM); | |
322 | goto error_return; | |
323 | } | |
324 | } | |
325 | } | |
326 | ||
1da177e4 LT |
327 | /* |
328 | * Now we can make the changes. Before we join the inode | |
0f285c8a | 329 | * to the transaction, if ATTR_SIZE is set then take care of |
1da177e4 LT |
330 | * the part of the truncation that must be done without the |
331 | * inode lock. This needs to be done before joining the inode | |
332 | * to the transaction, because the inode cannot be unlocked | |
333 | * once it is a part of the transaction. | |
334 | */ | |
0f285c8a | 335 | if (mask & ATTR_SIZE) { |
1da177e4 | 336 | code = 0; |
0f285c8a | 337 | if (iattr->ia_size > ip->i_size) { |
61436feb CH |
338 | /* |
339 | * Do the first part of growing a file: zero any data | |
340 | * in the last block that is beyond the old EOF. We | |
341 | * need to do this before the inode is joined to the | |
342 | * transaction to modify the i_size. | |
343 | */ | |
0f285c8a | 344 | code = xfs_zero_eof(ip, iattr->ia_size, ip->i_size); |
374e2ac3 | 345 | } |
1da177e4 | 346 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
c32676ee DC |
347 | |
348 | /* | |
349 | * We are going to log the inode size change in this | |
350 | * transaction so any previous writes that are beyond the on | |
351 | * disk EOF and the new EOF that have not been written out need | |
352 | * to be written here. If we do not write the data out, we | |
353 | * expose ourselves to the null files problem. | |
354 | * | |
355 | * Only flush from the on disk size to the smaller of the in | |
356 | * memory file size or the new size as that's the range we | |
357 | * really care about here and prevents waiting for other data | |
358 | * not within the range we care about here. | |
359 | */ | |
360 | if (!code && | |
0f285c8a CH |
361 | ip->i_size != ip->i_d.di_size && |
362 | iattr->ia_size > ip->i_d.di_size) { | |
739bfb2a | 363 | code = xfs_flush_pages(ip, |
0f285c8a | 364 | ip->i_d.di_size, iattr->ia_size, |
c32676ee DC |
365 | XFS_B_ASYNC, FI_NONE); |
366 | } | |
367 | ||
368 | /* wait for all I/O to complete */ | |
b677c210 | 369 | vn_iowait(ip); |
c32676ee | 370 | |
1da177e4 | 371 | if (!code) |
0f285c8a | 372 | code = xfs_itruncate_data(ip, iattr->ia_size); |
1da177e4 LT |
373 | if (code) { |
374 | ASSERT(tp == NULL); | |
375 | lock_flags &= ~XFS_ILOCK_EXCL; | |
376 | ASSERT(lock_flags == XFS_IOLOCK_EXCL); | |
377 | goto error_return; | |
378 | } | |
379 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); | |
380 | if ((code = xfs_trans_reserve(tp, 0, | |
381 | XFS_ITRUNCATE_LOG_RES(mp), 0, | |
382 | XFS_TRANS_PERM_LOG_RES, | |
383 | XFS_ITRUNCATE_LOG_COUNT))) { | |
384 | xfs_trans_cancel(tp, 0); | |
385 | if (need_iolock) | |
386 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
387 | return code; | |
388 | } | |
389 | commit_flags = XFS_TRANS_RELEASE_LOG_RES; | |
390 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
391 | } | |
392 | ||
393 | if (tp) { | |
394 | xfs_trans_ijoin(tp, ip, lock_flags); | |
395 | xfs_trans_ihold(tp, ip); | |
396 | } | |
397 | ||
1da177e4 LT |
398 | /* |
399 | * Truncate file. Must have write permission and not be a directory. | |
400 | */ | |
0f285c8a | 401 | if (mask & ATTR_SIZE) { |
44d814ce DC |
402 | /* |
403 | * Only change the c/mtime if we are changing the size | |
404 | * or we are explicitly asked to change it. This handles | |
405 | * the semantic difference between truncate() and ftruncate() | |
406 | * as implemented in the VFS. | |
407 | */ | |
0f285c8a | 408 | if (iattr->ia_size != ip->i_size || (mask & ATTR_CTIME)) |
44d814ce DC |
409 | timeflags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; |
410 | ||
0f285c8a CH |
411 | if (iattr->ia_size > ip->i_size) { |
412 | ip->i_d.di_size = iattr->ia_size; | |
413 | ip->i_size = iattr->ia_size; | |
414 | if (!(flags & XFS_ATTR_DMI)) | |
61436feb CH |
415 | xfs_ichgtime(ip, XFS_ICHGTIME_CHG); |
416 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
0f285c8a CH |
417 | } else if (iattr->ia_size <= ip->i_size || |
418 | (iattr->ia_size == 0 && ip->i_d.di_nextents)) { | |
1da177e4 LT |
419 | /* |
420 | * signal a sync transaction unless | |
421 | * we're truncating an already unlinked | |
422 | * file on a wsync filesystem | |
423 | */ | |
0f285c8a | 424 | code = xfs_itruncate_finish(&tp, ip, iattr->ia_size, |
1da177e4 LT |
425 | XFS_DATA_FORK, |
426 | ((ip->i_d.di_nlink != 0 || | |
427 | !(mp->m_flags & XFS_MOUNT_WSYNC)) | |
428 | ? 1 : 0)); | |
7d4fb40a | 429 | if (code) |
1da177e4 | 430 | goto abort_return; |
7d4fb40a NS |
431 | /* |
432 | * Truncated "down", so we're removing references | |
433 | * to old data here - if we now delay flushing for | |
434 | * a long time, we expose ourselves unduly to the | |
435 | * notorious NULL files problem. So, we mark this | |
436 | * vnode and flush it when the file is closed, and | |
437 | * do not wait the usual (long) time for writeout. | |
438 | */ | |
b3aea4ed | 439 | xfs_iflags_set(ip, XFS_ITRUNCATED); |
1da177e4 | 440 | } |
1da177e4 LT |
441 | } |
442 | ||
443 | /* | |
444 | * Change file access modes. | |
445 | */ | |
0f285c8a | 446 | if (mask & ATTR_MODE) { |
1da177e4 | 447 | ip->i_d.di_mode &= S_IFMT; |
0f285c8a | 448 | ip->i_d.di_mode |= iattr->ia_mode & ~S_IFMT; |
1da177e4 | 449 | |
f13fae2d CH |
450 | inode->i_mode &= S_IFMT; |
451 | inode->i_mode |= iattr->ia_mode & ~S_IFMT; | |
452 | ||
1da177e4 LT |
453 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); |
454 | timeflags |= XFS_ICHGTIME_CHG; | |
455 | } | |
456 | ||
457 | /* | |
458 | * Change file ownership. Must be the owner or privileged. | |
459 | * If the system was configured with the "restricted_chown" | |
460 | * option, the owner is not permitted to give away the file, | |
461 | * and can change the group id only to a group of which he | |
462 | * or she is a member. | |
463 | */ | |
0f285c8a | 464 | if (mask & (ATTR_UID|ATTR_GID)) { |
1da177e4 LT |
465 | /* |
466 | * CAP_FSETID overrides the following restrictions: | |
467 | * | |
468 | * The set-user-ID and set-group-ID bits of a file will be | |
469 | * cleared upon successful return from chown() | |
470 | */ | |
471 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && | |
472 | !capable(CAP_FSETID)) { | |
473 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); | |
474 | } | |
475 | ||
476 | /* | |
477 | * Change the ownerships and register quota modifications | |
478 | * in the transaction. | |
479 | */ | |
480 | if (iuid != uid) { | |
481 | if (XFS_IS_UQUOTA_ON(mp)) { | |
0f285c8a | 482 | ASSERT(mask & ATTR_UID); |
1da177e4 LT |
483 | ASSERT(udqp); |
484 | olddquot1 = XFS_QM_DQVOPCHOWN(mp, tp, ip, | |
485 | &ip->i_udquot, udqp); | |
486 | } | |
487 | ip->i_d.di_uid = uid; | |
f13fae2d | 488 | inode->i_uid = uid; |
1da177e4 LT |
489 | } |
490 | if (igid != gid) { | |
491 | if (XFS_IS_GQUOTA_ON(mp)) { | |
c8ad20ff | 492 | ASSERT(!XFS_IS_PQUOTA_ON(mp)); |
0f285c8a | 493 | ASSERT(mask & ATTR_GID); |
1da177e4 LT |
494 | ASSERT(gdqp); |
495 | olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip, | |
496 | &ip->i_gdquot, gdqp); | |
497 | } | |
498 | ip->i_d.di_gid = gid; | |
f13fae2d | 499 | inode->i_gid = gid; |
1da177e4 | 500 | } |
1da177e4 LT |
501 | |
502 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); | |
503 | timeflags |= XFS_ICHGTIME_CHG; | |
504 | } | |
505 | ||
506 | ||
507 | /* | |
508 | * Change file access or modified times. | |
509 | */ | |
0f285c8a CH |
510 | if (mask & (ATTR_ATIME|ATTR_MTIME)) { |
511 | if (mask & ATTR_ATIME) { | |
f13fae2d | 512 | inode->i_atime = iattr->ia_atime; |
0f285c8a CH |
513 | ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec; |
514 | ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec; | |
1da177e4 LT |
515 | ip->i_update_core = 1; |
516 | timeflags &= ~XFS_ICHGTIME_ACC; | |
517 | } | |
0f285c8a | 518 | if (mask & ATTR_MTIME) { |
f13fae2d | 519 | inode->i_mtime = iattr->ia_mtime; |
0f285c8a CH |
520 | ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec; |
521 | ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec; | |
1da177e4 LT |
522 | timeflags &= ~XFS_ICHGTIME_MOD; |
523 | timeflags |= XFS_ICHGTIME_CHG; | |
524 | } | |
0f285c8a | 525 | if (tp && (mask & (ATTR_MTIME_SET|ATTR_ATIME_SET))) |
1da177e4 LT |
526 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); |
527 | } | |
528 | ||
1da177e4 | 529 | /* |
0f285c8a | 530 | * Change file inode change time only if ATTR_CTIME set |
1da177e4 LT |
531 | * AND we have been called by a DMI function. |
532 | */ | |
533 | ||
0f285c8a | 534 | if ((flags & XFS_ATTR_DMI) && (mask & ATTR_CTIME)) { |
f13fae2d | 535 | inode->i_ctime = iattr->ia_ctime; |
0f285c8a CH |
536 | ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; |
537 | ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec; | |
1da177e4 LT |
538 | ip->i_update_core = 1; |
539 | timeflags &= ~XFS_ICHGTIME_CHG; | |
540 | } | |
541 | ||
542 | /* | |
543 | * Send out timestamp changes that need to be set to the | |
544 | * current time. Not done when called by a DMI function. | |
545 | */ | |
0f285c8a | 546 | if (timeflags && !(flags & XFS_ATTR_DMI)) |
1da177e4 LT |
547 | xfs_ichgtime(ip, timeflags); |
548 | ||
549 | XFS_STATS_INC(xs_ig_attrchg); | |
550 | ||
551 | /* | |
552 | * If this is a synchronous mount, make sure that the | |
553 | * transaction goes to disk before returning to the user. | |
554 | * This is slightly sub-optimal in that truncates require | |
c41564b5 | 555 | * two sync transactions instead of one for wsync filesystems. |
1da177e4 LT |
556 | * One for the truncate and one for the timestamps since we |
557 | * don't want to change the timestamps unless we're sure the | |
558 | * truncate worked. Truncates are less than 1% of the laddis | |
559 | * mix so this probably isn't worth the trouble to optimize. | |
560 | */ | |
561 | code = 0; | |
562 | if (tp) { | |
563 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
564 | xfs_trans_set_sync(tp); | |
565 | ||
1c72bf90 | 566 | code = xfs_trans_commit(tp, commit_flags); |
1da177e4 LT |
567 | } |
568 | ||
1da177e4 LT |
569 | xfs_iunlock(ip, lock_flags); |
570 | ||
571 | /* | |
572 | * Release any dquot(s) the inode had kept before chown. | |
573 | */ | |
574 | XFS_QM_DQRELE(mp, olddquot1); | |
575 | XFS_QM_DQRELE(mp, olddquot2); | |
576 | XFS_QM_DQRELE(mp, udqp); | |
577 | XFS_QM_DQRELE(mp, gdqp); | |
578 | ||
579 | if (code) { | |
580 | return code; | |
581 | } | |
582 | ||
eb9df39d | 583 | if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE) && |
0f285c8a | 584 | !(flags & XFS_ATTR_DMI)) { |
bc4ac74a | 585 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL, |
1da177e4 LT |
586 | NULL, DM_RIGHT_NULL, NULL, NULL, |
587 | 0, 0, AT_DELAY_FLAG(flags)); | |
588 | } | |
589 | return 0; | |
590 | ||
591 | abort_return: | |
592 | commit_flags |= XFS_TRANS_ABORT; | |
593 | /* FALLTHROUGH */ | |
594 | error_return: | |
595 | XFS_QM_DQRELE(mp, udqp); | |
596 | XFS_QM_DQRELE(mp, gdqp); | |
597 | if (tp) { | |
598 | xfs_trans_cancel(tp, commit_flags); | |
599 | } | |
600 | if (lock_flags != 0) { | |
601 | xfs_iunlock(ip, lock_flags); | |
602 | } | |
603 | return code; | |
604 | } | |
605 | ||
7d4fb40a NS |
606 | /* |
607 | * The maximum pathlen is 1024 bytes. Since the minimum file system | |
608 | * blocksize is 512 bytes, we can get a max of 2 extents back from | |
609 | * bmapi. | |
610 | */ | |
611 | #define SYMLINK_MAPS 2 | |
612 | ||
804c83c3 CH |
613 | STATIC int |
614 | xfs_readlink_bmap( | |
615 | xfs_inode_t *ip, | |
616 | char *link) | |
617 | { | |
618 | xfs_mount_t *mp = ip->i_mount; | |
619 | int pathlen = ip->i_d.di_size; | |
620 | int nmaps = SYMLINK_MAPS; | |
621 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
622 | xfs_daddr_t d; | |
623 | int byte_cnt; | |
624 | int n; | |
625 | xfs_buf_t *bp; | |
626 | int error = 0; | |
627 | ||
628 | error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen), 0, NULL, 0, | |
629 | mval, &nmaps, NULL, NULL); | |
630 | if (error) | |
631 | goto out; | |
632 | ||
633 | for (n = 0; n < nmaps; n++) { | |
634 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
635 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
636 | ||
637 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0); | |
638 | error = XFS_BUF_GETERROR(bp); | |
639 | if (error) { | |
640 | xfs_ioerror_alert("xfs_readlink", | |
641 | ip->i_mount, bp, XFS_BUF_ADDR(bp)); | |
642 | xfs_buf_relse(bp); | |
643 | goto out; | |
644 | } | |
645 | if (pathlen < byte_cnt) | |
646 | byte_cnt = pathlen; | |
647 | pathlen -= byte_cnt; | |
648 | ||
649 | memcpy(link, XFS_BUF_PTR(bp), byte_cnt); | |
650 | xfs_buf_relse(bp); | |
651 | } | |
652 | ||
653 | link[ip->i_d.di_size] = '\0'; | |
654 | error = 0; | |
655 | ||
656 | out: | |
657 | return error; | |
658 | } | |
659 | ||
993386c1 | 660 | int |
1da177e4 | 661 | xfs_readlink( |
993386c1 | 662 | xfs_inode_t *ip, |
804c83c3 | 663 | char *link) |
1da177e4 | 664 | { |
804c83c3 | 665 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 666 | int pathlen; |
1da177e4 | 667 | int error = 0; |
1da177e4 | 668 | |
cf441eeb | 669 | xfs_itrace_entry(ip); |
1da177e4 LT |
670 | |
671 | if (XFS_FORCED_SHUTDOWN(mp)) | |
672 | return XFS_ERROR(EIO); | |
673 | ||
674 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
675 | ||
676 | ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK); | |
804c83c3 | 677 | ASSERT(ip->i_d.di_size <= MAXPATHLEN); |
1da177e4 | 678 | |
804c83c3 CH |
679 | pathlen = ip->i_d.di_size; |
680 | if (!pathlen) | |
681 | goto out; | |
1da177e4 LT |
682 | |
683 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
804c83c3 CH |
684 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); |
685 | link[pathlen] = '\0'; | |
686 | } else { | |
687 | error = xfs_readlink_bmap(ip, link); | |
1da177e4 LT |
688 | } |
689 | ||
804c83c3 | 690 | out: |
1da177e4 | 691 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
1da177e4 LT |
692 | return error; |
693 | } | |
694 | ||
1da177e4 LT |
695 | /* |
696 | * xfs_fsync | |
697 | * | |
978b7237 DC |
698 | * This is called to sync the inode and its data out to disk. We need to hold |
699 | * the I/O lock while flushing the data, and the inode lock while flushing the | |
700 | * inode. The inode lock CANNOT be held while flushing the data, so acquire | |
701 | * after we're done with that. | |
1da177e4 | 702 | */ |
993386c1 | 703 | int |
1da177e4 | 704 | xfs_fsync( |
978b7237 | 705 | xfs_inode_t *ip) |
1da177e4 | 706 | { |
1da177e4 LT |
707 | xfs_trans_t *tp; |
708 | int error; | |
f538d4da | 709 | int log_flushed = 0, changed = 1; |
1da177e4 | 710 | |
cf441eeb | 711 | xfs_itrace_entry(ip); |
1da177e4 | 712 | |
1da177e4 LT |
713 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
714 | return XFS_ERROR(EIO); | |
715 | ||
978b7237 | 716 | /* capture size updates in I/O completion before writing the inode. */ |
863890cd | 717 | error = filemap_fdatawait(VFS_I(ip)->i_mapping); |
978b7237 DC |
718 | if (error) |
719 | return XFS_ERROR(error); | |
776a75fa | 720 | |
1da177e4 | 721 | /* |
978b7237 DC |
722 | * We always need to make sure that the required inode state is safe on |
723 | * disk. The vnode might be clean but we still might need to force the | |
724 | * log because of committed transactions that haven't hit the disk yet. | |
725 | * Likewise, there could be unflushed non-transactional changes to the | |
726 | * inode core that have to go to disk and this requires us to issue | |
727 | * a synchronous transaction to capture these changes correctly. | |
1da177e4 | 728 | * |
978b7237 DC |
729 | * This code relies on the assumption that if the update_* fields |
730 | * of the inode are clear and the inode is unpinned then it is clean | |
731 | * and no action is required. | |
1da177e4 LT |
732 | */ |
733 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
734 | ||
978b7237 | 735 | if (!(ip->i_update_size || ip->i_update_core)) { |
1da177e4 | 736 | /* |
978b7237 DC |
737 | * Timestamps/size haven't changed since last inode flush or |
738 | * inode transaction commit. That means either nothing got | |
739 | * written or a transaction committed which caught the updates. | |
740 | * If the latter happened and the transaction hasn't hit the | |
741 | * disk yet, the inode will be still be pinned. If it is, | |
742 | * force the log. | |
1da177e4 LT |
743 | */ |
744 | ||
745 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
746 | ||
747 | if (xfs_ipincount(ip)) { | |
978b7237 DC |
748 | error = _xfs_log_force(ip->i_mount, (xfs_lsn_t)0, |
749 | XFS_LOG_FORCE | XFS_LOG_SYNC, | |
f538d4da CH |
750 | &log_flushed); |
751 | } else { | |
752 | /* | |
978b7237 DC |
753 | * If the inode is not pinned and nothing has changed |
754 | * we don't need to flush the cache. | |
f538d4da CH |
755 | */ |
756 | changed = 0; | |
1da177e4 | 757 | } |
1da177e4 LT |
758 | } else { |
759 | /* | |
978b7237 DC |
760 | * Kick off a transaction to log the inode core to get the |
761 | * updates. The sync transaction will also force the log. | |
1da177e4 LT |
762 | */ |
763 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
764 | tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS); | |
978b7237 DC |
765 | error = xfs_trans_reserve(tp, 0, |
766 | XFS_FSYNC_TS_LOG_RES(ip->i_mount), 0, 0, 0); | |
767 | if (error) { | |
1da177e4 LT |
768 | xfs_trans_cancel(tp, 0); |
769 | return error; | |
770 | } | |
771 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
772 | ||
773 | /* | |
978b7237 DC |
774 | * Note - it's possible that we might have pushed ourselves out |
775 | * of the way during trans_reserve which would flush the inode. | |
776 | * But there's no guarantee that the inode buffer has actually | |
777 | * gone out yet (it's delwri). Plus the buffer could be pinned | |
778 | * anyway if it's part of an inode in another recent | |
779 | * transaction. So we play it safe and fire off the | |
780 | * transaction anyway. | |
1da177e4 LT |
781 | */ |
782 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
783 | xfs_trans_ihold(tp, ip); | |
784 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
978b7237 | 785 | xfs_trans_set_sync(tp); |
1c72bf90 | 786 | error = _xfs_trans_commit(tp, 0, &log_flushed); |
1da177e4 LT |
787 | |
788 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
789 | } | |
f538d4da CH |
790 | |
791 | if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) { | |
792 | /* | |
793 | * If the log write didn't issue an ordered tag we need | |
794 | * to flush the disk cache for the data device now. | |
795 | */ | |
796 | if (!log_flushed) | |
797 | xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp); | |
798 | ||
799 | /* | |
800 | * If this inode is on the RT dev we need to flush that | |
c41564b5 | 801 | * cache as well. |
f538d4da | 802 | */ |
71ddabb9 | 803 | if (XFS_IS_REALTIME_INODE(ip)) |
f538d4da CH |
804 | xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp); |
805 | } | |
806 | ||
1da177e4 LT |
807 | return error; |
808 | } | |
809 | ||
810 | /* | |
92dfe8d2 DC |
811 | * This is called by xfs_inactive to free any blocks beyond eof |
812 | * when the link count isn't zero and by xfs_dm_punch_hole() when | |
813 | * punching a hole to EOF. | |
1da177e4 | 814 | */ |
92dfe8d2 DC |
815 | int |
816 | xfs_free_eofblocks( | |
1da177e4 | 817 | xfs_mount_t *mp, |
92dfe8d2 DC |
818 | xfs_inode_t *ip, |
819 | int flags) | |
1da177e4 LT |
820 | { |
821 | xfs_trans_t *tp; | |
822 | int error; | |
823 | xfs_fileoff_t end_fsb; | |
824 | xfs_fileoff_t last_fsb; | |
825 | xfs_filblks_t map_len; | |
826 | int nimaps; | |
827 | xfs_bmbt_irec_t imap; | |
92dfe8d2 | 828 | int use_iolock = (flags & XFS_FREE_EOF_LOCK); |
1da177e4 LT |
829 | |
830 | /* | |
831 | * Figure out if there are any blocks beyond the end | |
832 | * of the file. If not, then there is nothing to do. | |
833 | */ | |
ba87ea69 | 834 | end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_size)); |
1da177e4 LT |
835 | last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
836 | map_len = last_fsb - end_fsb; | |
837 | if (map_len <= 0) | |
014c2544 | 838 | return 0; |
1da177e4 LT |
839 | |
840 | nimaps = 1; | |
841 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
541d7d3c | 842 | error = xfs_bmapi(NULL, ip, end_fsb, map_len, 0, |
3e57ecf6 | 843 | NULL, 0, &imap, &nimaps, NULL, NULL); |
1da177e4 LT |
844 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
845 | ||
846 | if (!error && (nimaps != 0) && | |
68bdb6ea YL |
847 | (imap.br_startblock != HOLESTARTBLOCK || |
848 | ip->i_delayed_blks)) { | |
1da177e4 LT |
849 | /* |
850 | * Attach the dquots to the inode up front. | |
851 | */ | |
852 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) | |
014c2544 | 853 | return error; |
1da177e4 LT |
854 | |
855 | /* | |
856 | * There are blocks after the end of file. | |
857 | * Free them up now by truncating the file to | |
858 | * its current size. | |
859 | */ | |
860 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
861 | ||
862 | /* | |
863 | * Do the xfs_itruncate_start() call before | |
864 | * reserving any log space because | |
865 | * itruncate_start will call into the buffer | |
866 | * cache and we can't | |
867 | * do that within a transaction. | |
868 | */ | |
92dfe8d2 DC |
869 | if (use_iolock) |
870 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
d3cf2094 | 871 | error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, |
ba87ea69 | 872 | ip->i_size); |
d3cf2094 | 873 | if (error) { |
87ae3c24 | 874 | xfs_trans_cancel(tp, 0); |
92dfe8d2 DC |
875 | if (use_iolock) |
876 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
d3cf2094 LM |
877 | return error; |
878 | } | |
1da177e4 LT |
879 | |
880 | error = xfs_trans_reserve(tp, 0, | |
881 | XFS_ITRUNCATE_LOG_RES(mp), | |
882 | 0, XFS_TRANS_PERM_LOG_RES, | |
883 | XFS_ITRUNCATE_LOG_COUNT); | |
884 | if (error) { | |
885 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
886 | xfs_trans_cancel(tp, 0); | |
887 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 888 | return error; |
1da177e4 LT |
889 | } |
890 | ||
891 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
892 | xfs_trans_ijoin(tp, ip, | |
893 | XFS_IOLOCK_EXCL | | |
894 | XFS_ILOCK_EXCL); | |
895 | xfs_trans_ihold(tp, ip); | |
896 | ||
897 | error = xfs_itruncate_finish(&tp, ip, | |
ba87ea69 | 898 | ip->i_size, |
1da177e4 LT |
899 | XFS_DATA_FORK, |
900 | 0); | |
901 | /* | |
902 | * If we get an error at this point we | |
903 | * simply don't bother truncating the file. | |
904 | */ | |
905 | if (error) { | |
906 | xfs_trans_cancel(tp, | |
907 | (XFS_TRANS_RELEASE_LOG_RES | | |
908 | XFS_TRANS_ABORT)); | |
909 | } else { | |
910 | error = xfs_trans_commit(tp, | |
1c72bf90 | 911 | XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 912 | } |
92dfe8d2 DC |
913 | xfs_iunlock(ip, (use_iolock ? (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL) |
914 | : XFS_ILOCK_EXCL)); | |
1da177e4 | 915 | } |
014c2544 | 916 | return error; |
1da177e4 LT |
917 | } |
918 | ||
919 | /* | |
920 | * Free a symlink that has blocks associated with it. | |
921 | */ | |
922 | STATIC int | |
923 | xfs_inactive_symlink_rmt( | |
924 | xfs_inode_t *ip, | |
925 | xfs_trans_t **tpp) | |
926 | { | |
927 | xfs_buf_t *bp; | |
928 | int committed; | |
929 | int done; | |
930 | int error; | |
931 | xfs_fsblock_t first_block; | |
932 | xfs_bmap_free_t free_list; | |
933 | int i; | |
934 | xfs_mount_t *mp; | |
935 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
936 | int nmaps; | |
937 | xfs_trans_t *ntp; | |
938 | int size; | |
939 | xfs_trans_t *tp; | |
940 | ||
941 | tp = *tpp; | |
942 | mp = ip->i_mount; | |
943 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); | |
944 | /* | |
945 | * We're freeing a symlink that has some | |
946 | * blocks allocated to it. Free the | |
947 | * blocks here. We know that we've got | |
948 | * either 1 or 2 extents and that we can | |
949 | * free them all in one bunmapi call. | |
950 | */ | |
951 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
952 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
953 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
954 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
955 | xfs_trans_cancel(tp, 0); | |
956 | *tpp = NULL; | |
957 | return error; | |
958 | } | |
959 | /* | |
960 | * Lock the inode, fix the size, and join it to the transaction. | |
961 | * Hold it so in the normal path, we still have it locked for | |
962 | * the second transaction. In the error paths we need it | |
963 | * held so the cancel won't rele it, see below. | |
964 | */ | |
965 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
966 | size = (int)ip->i_d.di_size; | |
967 | ip->i_d.di_size = 0; | |
968 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
969 | xfs_trans_ihold(tp, ip); | |
970 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
971 | /* | |
972 | * Find the block(s) so we can inval and unmap them. | |
973 | */ | |
974 | done = 0; | |
975 | XFS_BMAP_INIT(&free_list, &first_block); | |
e8c96f8c | 976 | nmaps = ARRAY_SIZE(mval); |
1da177e4 LT |
977 | if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size), |
978 | XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps, | |
3e57ecf6 | 979 | &free_list, NULL))) |
1da177e4 LT |
980 | goto error0; |
981 | /* | |
982 | * Invalidate the block(s). | |
983 | */ | |
984 | for (i = 0; i < nmaps; i++) { | |
985 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
986 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
987 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
988 | xfs_trans_binval(tp, bp); | |
989 | } | |
990 | /* | |
991 | * Unmap the dead block(s) to the free_list. | |
992 | */ | |
993 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, | |
3e57ecf6 | 994 | &first_block, &free_list, NULL, &done))) |
1da177e4 LT |
995 | goto error1; |
996 | ASSERT(done); | |
997 | /* | |
998 | * Commit the first transaction. This logs the EFI and the inode. | |
999 | */ | |
f7c99b6f | 1000 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
1da177e4 LT |
1001 | goto error1; |
1002 | /* | |
1003 | * The transaction must have been committed, since there were | |
1004 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
1005 | * The new tp has the extent freeing and EFDs. | |
1006 | */ | |
1007 | ASSERT(committed); | |
1008 | /* | |
1009 | * The first xact was committed, so add the inode to the new one. | |
1010 | * Mark it dirty so it will be logged and moved forward in the log as | |
1011 | * part of every commit. | |
1012 | */ | |
1013 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
1014 | xfs_trans_ihold(tp, ip); | |
1015 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1016 | /* | |
1017 | * Get a new, empty transaction to return to our caller. | |
1018 | */ | |
1019 | ntp = xfs_trans_dup(tp); | |
1020 | /* | |
c41564b5 | 1021 | * Commit the transaction containing extent freeing and EFDs. |
1da177e4 LT |
1022 | * If we get an error on the commit here or on the reserve below, |
1023 | * we need to unlock the inode since the new transaction doesn't | |
1024 | * have the inode attached. | |
1025 | */ | |
1c72bf90 | 1026 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
1027 | tp = ntp; |
1028 | if (error) { | |
1029 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1030 | goto error0; | |
1031 | } | |
1032 | /* | |
1033 | * Remove the memory for extent descriptions (just bookkeeping). | |
1034 | */ | |
1035 | if (ip->i_df.if_bytes) | |
1036 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
1037 | ASSERT(ip->i_df.if_bytes == 0); | |
1038 | /* | |
1039 | * Put an itruncate log reservation in the new transaction | |
1040 | * for our caller. | |
1041 | */ | |
1042 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
1043 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
1044 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1045 | goto error0; | |
1046 | } | |
1047 | /* | |
1048 | * Return with the inode locked but not joined to the transaction. | |
1049 | */ | |
1050 | *tpp = tp; | |
1051 | return 0; | |
1052 | ||
1053 | error1: | |
1054 | xfs_bmap_cancel(&free_list); | |
1055 | error0: | |
1056 | /* | |
1057 | * Have to come here with the inode locked and either | |
1058 | * (held and in the transaction) or (not in the transaction). | |
1059 | * If the inode isn't held then cancel would iput it, but | |
1060 | * that's wrong since this is inactive and the vnode ref | |
1061 | * count is 0 already. | |
1062 | * Cancel won't do anything to the inode if held, but it still | |
1063 | * needs to be locked until the cancel is done, if it was | |
1064 | * joined to the transaction. | |
1065 | */ | |
1066 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
1067 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1068 | *tpp = NULL; | |
1069 | return error; | |
1070 | ||
1071 | } | |
1072 | ||
1073 | STATIC int | |
1074 | xfs_inactive_symlink_local( | |
1075 | xfs_inode_t *ip, | |
1076 | xfs_trans_t **tpp) | |
1077 | { | |
1078 | int error; | |
1079 | ||
1080 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); | |
1081 | /* | |
1082 | * We're freeing a symlink which fit into | |
1083 | * the inode. Just free the memory used | |
1084 | * to hold the old symlink. | |
1085 | */ | |
1086 | error = xfs_trans_reserve(*tpp, 0, | |
1087 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), | |
1088 | 0, XFS_TRANS_PERM_LOG_RES, | |
1089 | XFS_ITRUNCATE_LOG_COUNT); | |
1090 | ||
1091 | if (error) { | |
1092 | xfs_trans_cancel(*tpp, 0); | |
1093 | *tpp = NULL; | |
014c2544 | 1094 | return error; |
1da177e4 LT |
1095 | } |
1096 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
1097 | ||
1098 | /* | |
1099 | * Zero length symlinks _can_ exist. | |
1100 | */ | |
1101 | if (ip->i_df.if_bytes > 0) { | |
1102 | xfs_idata_realloc(ip, | |
1103 | -(ip->i_df.if_bytes), | |
1104 | XFS_DATA_FORK); | |
1105 | ASSERT(ip->i_df.if_bytes == 0); | |
1106 | } | |
014c2544 | 1107 | return 0; |
1da177e4 LT |
1108 | } |
1109 | ||
1da177e4 LT |
1110 | STATIC int |
1111 | xfs_inactive_attrs( | |
1112 | xfs_inode_t *ip, | |
1113 | xfs_trans_t **tpp) | |
1114 | { | |
1115 | xfs_trans_t *tp; | |
1116 | int error; | |
1117 | xfs_mount_t *mp; | |
1118 | ||
579aa9ca | 1119 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
1da177e4 LT |
1120 | tp = *tpp; |
1121 | mp = ip->i_mount; | |
1122 | ASSERT(ip->i_d.di_forkoff != 0); | |
e5720eec | 1123 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 1124 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
e5720eec DC |
1125 | if (error) |
1126 | goto error_unlock; | |
1da177e4 LT |
1127 | |
1128 | error = xfs_attr_inactive(ip); | |
e5720eec DC |
1129 | if (error) |
1130 | goto error_unlock; | |
1da177e4 LT |
1131 | |
1132 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1133 | error = xfs_trans_reserve(tp, 0, | |
1134 | XFS_IFREE_LOG_RES(mp), | |
1135 | 0, XFS_TRANS_PERM_LOG_RES, | |
1136 | XFS_INACTIVE_LOG_COUNT); | |
e5720eec DC |
1137 | if (error) |
1138 | goto error_cancel; | |
1da177e4 LT |
1139 | |
1140 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1141 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1142 | xfs_trans_ihold(tp, ip); | |
1143 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
1144 | ||
1145 | ASSERT(ip->i_d.di_anextents == 0); | |
1146 | ||
1147 | *tpp = tp; | |
014c2544 | 1148 | return 0; |
e5720eec DC |
1149 | |
1150 | error_cancel: | |
1151 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1152 | xfs_trans_cancel(tp, 0); | |
1153 | error_unlock: | |
1154 | *tpp = NULL; | |
1155 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1156 | return error; | |
1da177e4 LT |
1157 | } |
1158 | ||
993386c1 | 1159 | int |
1da177e4 | 1160 | xfs_release( |
993386c1 | 1161 | xfs_inode_t *ip) |
1da177e4 | 1162 | { |
e4f75291 | 1163 | bhv_vnode_t *vp = VFS_I(ip); |
993386c1 | 1164 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
1165 | int error; |
1166 | ||
42173f68 | 1167 | if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) |
1da177e4 | 1168 | return 0; |
1da177e4 LT |
1169 | |
1170 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 1171 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
1172 | return 0; |
1173 | ||
2a82b8be | 1174 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
b3aea4ed CH |
1175 | int truncated; |
1176 | ||
2a82b8be DC |
1177 | /* |
1178 | * If we are using filestreams, and we have an unlinked | |
1179 | * file that we are processing the last close on, then nothing | |
1180 | * will be able to reopen and write to this file. Purge this | |
1181 | * inode from the filestreams cache so that it doesn't delay | |
1182 | * teardown of the inode. | |
1183 | */ | |
1184 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) | |
1185 | xfs_filestream_deassociate(ip); | |
1186 | ||
fbf3ce8d CH |
1187 | /* |
1188 | * If we previously truncated this file and removed old data | |
1189 | * in the process, we want to initiate "early" writeout on | |
1190 | * the last close. This is an attempt to combat the notorious | |
1191 | * NULL files problem which is particularly noticable from a | |
1192 | * truncate down, buffered (re-)write (delalloc), followed by | |
1193 | * a crash. What we are effectively doing here is | |
1194 | * significantly reducing the time window where we'd otherwise | |
1195 | * be exposed to that problem. | |
1196 | */ | |
09262b43 | 1197 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
b3aea4ed | 1198 | if (truncated && VN_DIRTY(vp) && ip->i_delayed_blks > 0) |
739bfb2a | 1199 | xfs_flush_pages(ip, 0, -1, XFS_B_ASYNC, FI_NONE); |
fbf3ce8d CH |
1200 | } |
1201 | ||
1da177e4 LT |
1202 | if (ip->i_d.di_nlink != 0) { |
1203 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
ba87ea69 | 1204 | ((ip->i_size > 0) || (VN_CACHED(vp) > 0 || |
68bdb6ea | 1205 | ip->i_delayed_blks > 0)) && |
1da177e4 | 1206 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && |
dd9f438e NS |
1207 | (!(ip->i_d.di_flags & |
1208 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { | |
92dfe8d2 DC |
1209 | error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_LOCK); |
1210 | if (error) | |
014c2544 | 1211 | return error; |
1da177e4 LT |
1212 | } |
1213 | } | |
1214 | ||
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * xfs_inactive | |
1220 | * | |
1221 | * This is called when the vnode reference count for the vnode | |
1222 | * goes to zero. If the file has been unlinked, then it must | |
1223 | * now be truncated. Also, we clear all of the read-ahead state | |
1224 | * kept for the inode here since the file is now closed. | |
1225 | */ | |
993386c1 | 1226 | int |
1da177e4 | 1227 | xfs_inactive( |
993386c1 | 1228 | xfs_inode_t *ip) |
1da177e4 | 1229 | { |
e4f75291 | 1230 | bhv_vnode_t *vp = VFS_I(ip); |
67fcaa73 | 1231 | xfs_bmap_free_t free_list; |
1da177e4 LT |
1232 | xfs_fsblock_t first_block; |
1233 | int committed; | |
1234 | xfs_trans_t *tp; | |
1235 | xfs_mount_t *mp; | |
1236 | int error; | |
1237 | int truncate; | |
1238 | ||
cf441eeb | 1239 | xfs_itrace_entry(ip); |
1da177e4 | 1240 | |
1da177e4 LT |
1241 | /* |
1242 | * If the inode is already free, then there can be nothing | |
1243 | * to clean up here. | |
1244 | */ | |
1245 | if (ip->i_d.di_mode == 0 || VN_BAD(vp)) { | |
1246 | ASSERT(ip->i_df.if_real_bytes == 0); | |
1247 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
1248 | return VN_INACTIVE_CACHE; | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * Only do a truncate if it's a regular file with | |
1253 | * some actual space in it. It's OK to look at the | |
1254 | * inode's fields without the lock because we're the | |
1255 | * only one with a reference to the inode. | |
1256 | */ | |
1257 | truncate = ((ip->i_d.di_nlink == 0) && | |
ba87ea69 LM |
1258 | ((ip->i_d.di_size != 0) || (ip->i_size != 0) || |
1259 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && | |
1da177e4 LT |
1260 | ((ip->i_d.di_mode & S_IFMT) == S_IFREG)); |
1261 | ||
1262 | mp = ip->i_mount; | |
1263 | ||
bc4ac74a CH |
1264 | if (ip->i_d.di_nlink == 0 && DM_EVENT_ENABLED(ip, DM_EVENT_DESTROY)) |
1265 | XFS_SEND_DESTROY(mp, ip, DM_RIGHT_NULL); | |
1da177e4 LT |
1266 | |
1267 | error = 0; | |
1268 | ||
1269 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 1270 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
1271 | goto out; |
1272 | ||
1273 | if (ip->i_d.di_nlink != 0) { | |
1274 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
ba87ea69 | 1275 | ((ip->i_size > 0) || (VN_CACHED(vp) > 0 || |
68bdb6ea | 1276 | ip->i_delayed_blks > 0)) && |
dd9f438e NS |
1277 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
1278 | (!(ip->i_d.di_flags & | |
1279 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || | |
1280 | (ip->i_delayed_blks != 0)))) { | |
92dfe8d2 DC |
1281 | error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_LOCK); |
1282 | if (error) | |
014c2544 | 1283 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1284 | } |
1285 | goto out; | |
1286 | } | |
1287 | ||
1288 | ASSERT(ip->i_d.di_nlink == 0); | |
1289 | ||
1290 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) | |
014c2544 | 1291 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1292 | |
1293 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1294 | if (truncate) { | |
1295 | /* | |
1296 | * Do the xfs_itruncate_start() call before | |
1297 | * reserving any log space because itruncate_start | |
1298 | * will call into the buffer cache and we can't | |
1299 | * do that within a transaction. | |
1300 | */ | |
1301 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
1302 | ||
d3cf2094 LM |
1303 | error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0); |
1304 | if (error) { | |
87ae3c24 | 1305 | xfs_trans_cancel(tp, 0); |
d3cf2094 LM |
1306 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
1307 | return VN_INACTIVE_CACHE; | |
1308 | } | |
1da177e4 LT |
1309 | |
1310 | error = xfs_trans_reserve(tp, 0, | |
1311 | XFS_ITRUNCATE_LOG_RES(mp), | |
1312 | 0, XFS_TRANS_PERM_LOG_RES, | |
1313 | XFS_ITRUNCATE_LOG_COUNT); | |
1314 | if (error) { | |
1315 | /* Don't call itruncate_cleanup */ | |
1316 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1317 | xfs_trans_cancel(tp, 0); | |
1318 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 1319 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1320 | } |
1321 | ||
1322 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1323 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1324 | xfs_trans_ihold(tp, ip); | |
1325 | ||
1326 | /* | |
1327 | * normally, we have to run xfs_itruncate_finish sync. | |
1328 | * But if filesystem is wsync and we're in the inactive | |
1329 | * path, then we know that nlink == 0, and that the | |
1330 | * xaction that made nlink == 0 is permanently committed | |
1331 | * since xfs_remove runs as a synchronous transaction. | |
1332 | */ | |
1333 | error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK, | |
1334 | (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0)); | |
1335 | ||
1336 | if (error) { | |
1337 | xfs_trans_cancel(tp, | |
1338 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
1339 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
014c2544 | 1340 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1341 | } |
1342 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) { | |
1343 | ||
1344 | /* | |
1345 | * If we get an error while cleaning up a | |
1346 | * symlink we bail out. | |
1347 | */ | |
1348 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? | |
1349 | xfs_inactive_symlink_rmt(ip, &tp) : | |
1350 | xfs_inactive_symlink_local(ip, &tp); | |
1351 | ||
1352 | if (error) { | |
1353 | ASSERT(tp == NULL); | |
014c2544 | 1354 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1355 | } |
1356 | ||
1357 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1358 | xfs_trans_ihold(tp, ip); | |
1359 | } else { | |
1360 | error = xfs_trans_reserve(tp, 0, | |
1361 | XFS_IFREE_LOG_RES(mp), | |
1362 | 0, XFS_TRANS_PERM_LOG_RES, | |
1363 | XFS_INACTIVE_LOG_COUNT); | |
1364 | if (error) { | |
1365 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1366 | xfs_trans_cancel(tp, 0); | |
014c2544 | 1367 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1368 | } |
1369 | ||
1370 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
1371 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1372 | xfs_trans_ihold(tp, ip); | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | * If there are attributes associated with the file | |
1377 | * then blow them away now. The code calls a routine | |
1378 | * that recursively deconstructs the attribute fork. | |
1379 | * We need to just commit the current transaction | |
1380 | * because we can't use it for xfs_attr_inactive(). | |
1381 | */ | |
1382 | if (ip->i_d.di_anextents > 0) { | |
1383 | error = xfs_inactive_attrs(ip, &tp); | |
1384 | /* | |
1385 | * If we got an error, the transaction is already | |
1386 | * cancelled, and the inode is unlocked. Just get out. | |
1387 | */ | |
1388 | if (error) | |
014c2544 | 1389 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1390 | } else if (ip->i_afp) { |
1391 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
1392 | } | |
1393 | ||
1394 | /* | |
1395 | * Free the inode. | |
1396 | */ | |
1397 | XFS_BMAP_INIT(&free_list, &first_block); | |
1398 | error = xfs_ifree(tp, ip, &free_list); | |
1399 | if (error) { | |
1400 | /* | |
1401 | * If we fail to free the inode, shut down. The cancel | |
1402 | * might do that, we need to make sure. Otherwise the | |
1403 | * inode might be lost for a long time or forever. | |
1404 | */ | |
1405 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1406 | cmn_err(CE_NOTE, | |
1407 | "xfs_inactive: xfs_ifree() returned an error = %d on %s", | |
1408 | error, mp->m_fsname); | |
7d04a335 | 1409 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
1410 | } |
1411 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
1412 | } else { | |
1413 | /* | |
1414 | * Credit the quota account(s). The inode is gone. | |
1415 | */ | |
1416 | XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_ICOUNT, -1); | |
1417 | ||
1418 | /* | |
78e9da77 DC |
1419 | * Just ignore errors at this point. There is nothing we can |
1420 | * do except to try to keep going. Make sure it's not a silent | |
1421 | * error. | |
1da177e4 | 1422 | */ |
78e9da77 DC |
1423 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1424 | if (error) | |
1425 | xfs_fs_cmn_err(CE_NOTE, mp, "xfs_inactive: " | |
1426 | "xfs_bmap_finish() returned error %d", error); | |
1427 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
1428 | if (error) | |
1429 | xfs_fs_cmn_err(CE_NOTE, mp, "xfs_inactive: " | |
1430 | "xfs_trans_commit() returned error %d", error); | |
1da177e4 LT |
1431 | } |
1432 | /* | |
1433 | * Release the dquots held by inode, if any. | |
1434 | */ | |
1435 | XFS_QM_DQDETACH(mp, ip); | |
1436 | ||
1437 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1438 | ||
1439 | out: | |
1440 | return VN_INACTIVE_CACHE; | |
1441 | } | |
1442 | ||
384f3ced BN |
1443 | /* |
1444 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
1445 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
1446 | * ci_name->name will point to a the actual name (caller must free) or | |
1447 | * will be set to NULL if an exact match is found. | |
1448 | */ | |
993386c1 | 1449 | int |
1da177e4 | 1450 | xfs_lookup( |
993386c1 | 1451 | xfs_inode_t *dp, |
556b8b16 | 1452 | struct xfs_name *name, |
384f3ced BN |
1453 | xfs_inode_t **ipp, |
1454 | struct xfs_name *ci_name) | |
1da177e4 | 1455 | { |
eca450b7 | 1456 | xfs_ino_t inum; |
1da177e4 LT |
1457 | int error; |
1458 | uint lock_mode; | |
1da177e4 | 1459 | |
cf441eeb | 1460 | xfs_itrace_entry(dp); |
1da177e4 LT |
1461 | |
1462 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
1463 | return XFS_ERROR(EIO); | |
1464 | ||
1465 | lock_mode = xfs_ilock_map_shared(dp); | |
384f3ced | 1466 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
1da177e4 | 1467 | xfs_iunlock_map_shared(dp, lock_mode); |
eca450b7 CH |
1468 | |
1469 | if (error) | |
1470 | goto out; | |
1471 | ||
1472 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp, 0); | |
1473 | if (error) | |
384f3ced | 1474 | goto out_free_name; |
eca450b7 CH |
1475 | |
1476 | xfs_itrace_ref(*ipp); | |
1477 | return 0; | |
1478 | ||
384f3ced BN |
1479 | out_free_name: |
1480 | if (ci_name) | |
1481 | kmem_free(ci_name->name); | |
1482 | out: | |
eca450b7 | 1483 | *ipp = NULL; |
1da177e4 LT |
1484 | return error; |
1485 | } | |
1486 | ||
993386c1 | 1487 | int |
1da177e4 | 1488 | xfs_create( |
993386c1 | 1489 | xfs_inode_t *dp, |
556b8b16 | 1490 | struct xfs_name *name, |
3e5daf05 CH |
1491 | mode_t mode, |
1492 | xfs_dev_t rdev, | |
979ebab1 | 1493 | xfs_inode_t **ipp, |
1da177e4 LT |
1494 | cred_t *credp) |
1495 | { | |
556b8b16 | 1496 | xfs_mount_t *mp = dp->i_mount; |
993386c1 | 1497 | xfs_inode_t *ip; |
1da177e4 | 1498 | xfs_trans_t *tp; |
556b8b16 | 1499 | int error; |
1da177e4 LT |
1500 | xfs_bmap_free_t free_list; |
1501 | xfs_fsblock_t first_block; | |
993386c1 | 1502 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1503 | int dm_event_sent = 0; |
1504 | uint cancel_flags; | |
1505 | int committed; | |
1506 | xfs_prid_t prid; | |
1507 | struct xfs_dquot *udqp, *gdqp; | |
1508 | uint resblks; | |
1da177e4 | 1509 | |
979ebab1 | 1510 | ASSERT(!*ipp); |
cf441eeb | 1511 | xfs_itrace_entry(dp); |
1da177e4 | 1512 | |
eb9df39d | 1513 | if (DM_EVENT_ENABLED(dp, DM_EVENT_CREATE)) { |
1da177e4 | 1514 | error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, |
bc4ac74a | 1515 | dp, DM_RIGHT_NULL, NULL, |
556b8b16 | 1516 | DM_RIGHT_NULL, name->name, NULL, |
3e5daf05 | 1517 | mode, 0, 0); |
1da177e4 LT |
1518 | |
1519 | if (error) | |
1520 | return error; | |
1521 | dm_event_sent = 1; | |
1522 | } | |
1523 | ||
1524 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1525 | return XFS_ERROR(EIO); | |
1526 | ||
1527 | /* Return through std_return after this point. */ | |
1528 | ||
1529 | udqp = gdqp = NULL; | |
365ca83d NS |
1530 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
1531 | prid = dp->i_d.di_projid; | |
1da177e4 LT |
1532 | else |
1533 | prid = (xfs_prid_t)dfltprid; | |
1534 | ||
1535 | /* | |
1536 | * Make sure that we have allocated dquot(s) on disk. | |
1537 | */ | |
1538 | error = XFS_QM_DQVOPALLOC(mp, dp, | |
c8ad20ff | 1539 | current_fsuid(credp), current_fsgid(credp), prid, |
1da177e4 LT |
1540 | XFS_QMOPT_QUOTALL|XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1541 | if (error) | |
1542 | goto std_return; | |
1543 | ||
1544 | ip = NULL; | |
1da177e4 LT |
1545 | |
1546 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); | |
1547 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 1548 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); |
1da177e4 LT |
1549 | /* |
1550 | * Initially assume that the file does not exist and | |
1551 | * reserve the resources for that case. If that is not | |
1552 | * the case we'll drop the one we have and get a more | |
1553 | * appropriate transaction later. | |
1554 | */ | |
1555 | error = xfs_trans_reserve(tp, resblks, XFS_CREATE_LOG_RES(mp), 0, | |
1556 | XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT); | |
1557 | if (error == ENOSPC) { | |
1558 | resblks = 0; | |
1559 | error = xfs_trans_reserve(tp, 0, XFS_CREATE_LOG_RES(mp), 0, | |
1560 | XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT); | |
1561 | } | |
1562 | if (error) { | |
1563 | cancel_flags = 0; | |
1da177e4 LT |
1564 | goto error_return; |
1565 | } | |
1566 | ||
f7c66ce3 | 1567 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 1568 | unlock_dp_on_error = B_TRUE; |
1da177e4 LT |
1569 | |
1570 | XFS_BMAP_INIT(&free_list, &first_block); | |
1571 | ||
1572 | ASSERT(ip == NULL); | |
1573 | ||
1574 | /* | |
1575 | * Reserve disk quota and the inode. | |
1576 | */ | |
1577 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); | |
1578 | if (error) | |
1579 | goto error_return; | |
1580 | ||
556b8b16 BN |
1581 | error = xfs_dir_canenter(tp, dp, name, resblks); |
1582 | if (error) | |
1da177e4 | 1583 | goto error_return; |
3e5daf05 | 1584 | error = xfs_dir_ialloc(&tp, dp, mode, 1, |
1da177e4 LT |
1585 | rdev, credp, prid, resblks > 0, |
1586 | &ip, &committed); | |
1587 | if (error) { | |
1588 | if (error == ENOSPC) | |
1589 | goto error_return; | |
1590 | goto abort_return; | |
1591 | } | |
cf441eeb | 1592 | xfs_itrace_ref(ip); |
1da177e4 LT |
1593 | |
1594 | /* | |
1595 | * At this point, we've gotten a newly allocated inode. | |
1596 | * It is locked (and joined to the transaction). | |
1597 | */ | |
1598 | ||
579aa9ca | 1599 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
1600 | |
1601 | /* | |
993386c1 CH |
1602 | * Now we join the directory inode to the transaction. We do not do it |
1603 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
1604 | * (and release all the locks). An error from here on will result in | |
1605 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
1606 | * error path. | |
1da177e4 | 1607 | */ |
979ebab1 | 1608 | IHOLD(dp); |
1da177e4 | 1609 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 1610 | unlock_dp_on_error = B_FALSE; |
1da177e4 | 1611 | |
556b8b16 | 1612 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
f6c2d1fa NS |
1613 | &first_block, &free_list, resblks ? |
1614 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
1615 | if (error) { |
1616 | ASSERT(error != ENOSPC); | |
1617 | goto abort_return; | |
1618 | } | |
1619 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1620 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1621 | ||
1622 | /* | |
1623 | * If this is a synchronous mount, make sure that the | |
1624 | * create transaction goes to disk before returning to | |
1625 | * the user. | |
1626 | */ | |
1627 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
1628 | xfs_trans_set_sync(tp); | |
1629 | } | |
1630 | ||
1631 | dp->i_gen++; | |
1632 | ||
1633 | /* | |
1634 | * Attach the dquot(s) to the inodes and modify them incore. | |
1635 | * These ids of the inode couldn't have changed since the new | |
1636 | * inode has been locked ever since it was created. | |
1637 | */ | |
1638 | XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp); | |
1639 | ||
1640 | /* | |
1641 | * xfs_trans_commit normally decrements the vnode ref count | |
1642 | * when it unlocks the inode. Since we want to return the | |
1643 | * vnode to the caller, we bump the vnode ref count now. | |
1644 | */ | |
1645 | IHOLD(ip); | |
1da177e4 | 1646 | |
f7c99b6f | 1647 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
1648 | if (error) { |
1649 | xfs_bmap_cancel(&free_list); | |
1650 | goto abort_rele; | |
1651 | } | |
1652 | ||
1c72bf90 | 1653 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1654 | if (error) { |
1655 | IRELE(ip); | |
1656 | tp = NULL; | |
1657 | goto error_return; | |
1658 | } | |
1659 | ||
1660 | XFS_QM_DQRELE(mp, udqp); | |
1661 | XFS_QM_DQRELE(mp, gdqp); | |
1662 | ||
979ebab1 | 1663 | *ipp = ip; |
1da177e4 LT |
1664 | |
1665 | /* Fallthrough to std_return with error = 0 */ | |
1666 | ||
1667 | std_return: | |
979ebab1 | 1668 | if ((*ipp || (error != 0 && dm_event_sent != 0)) && |
993386c1 | 1669 | DM_EVENT_ENABLED(dp, DM_EVENT_POSTCREATE)) { |
1da177e4 | 1670 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, |
bc4ac74a | 1671 | dp, DM_RIGHT_NULL, |
979ebab1 | 1672 | *ipp ? ip : NULL, |
556b8b16 | 1673 | DM_RIGHT_NULL, name->name, NULL, |
3e5daf05 | 1674 | mode, error, 0); |
1da177e4 LT |
1675 | } |
1676 | return error; | |
1677 | ||
1678 | abort_return: | |
1679 | cancel_flags |= XFS_TRANS_ABORT; | |
1680 | /* FALLTHROUGH */ | |
1da177e4 | 1681 | |
014c2544 | 1682 | error_return: |
1da177e4 LT |
1683 | if (tp != NULL) |
1684 | xfs_trans_cancel(tp, cancel_flags); | |
1685 | ||
1da177e4 LT |
1686 | XFS_QM_DQRELE(mp, udqp); |
1687 | XFS_QM_DQRELE(mp, gdqp); | |
1688 | ||
993386c1 CH |
1689 | if (unlock_dp_on_error) |
1690 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
1691 | ||
1da177e4 LT |
1692 | goto std_return; |
1693 | ||
1694 | abort_rele: | |
1695 | /* | |
1696 | * Wait until after the current transaction is aborted to | |
1697 | * release the inode. This prevents recursive transactions | |
1698 | * and deadlocks from xfs_inactive. | |
1699 | */ | |
1700 | cancel_flags |= XFS_TRANS_ABORT; | |
1701 | xfs_trans_cancel(tp, cancel_flags); | |
1702 | IRELE(ip); | |
1703 | ||
1704 | XFS_QM_DQRELE(mp, udqp); | |
1705 | XFS_QM_DQRELE(mp, gdqp); | |
1706 | ||
1707 | goto std_return; | |
1708 | } | |
1709 | ||
1710 | #ifdef DEBUG | |
1711 | /* | |
1712 | * Some counters to see if (and how often) we are hitting some deadlock | |
1713 | * prevention code paths. | |
1714 | */ | |
1715 | ||
1716 | int xfs_rm_locks; | |
1717 | int xfs_rm_lock_delays; | |
1718 | int xfs_rm_attempts; | |
1719 | #endif | |
1720 | ||
1721 | /* | |
1722 | * The following routine will lock the inodes associated with the | |
1723 | * directory and the named entry in the directory. The locks are | |
1724 | * acquired in increasing inode number. | |
1725 | * | |
1726 | * If the entry is "..", then only the directory is locked. The | |
1727 | * vnode ref count will still include that from the .. entry in | |
1728 | * this case. | |
1729 | * | |
1730 | * There is a deadlock we need to worry about. If the locked directory is | |
1731 | * in the AIL, it might be blocking up the log. The next inode we lock | |
1732 | * could be already locked by another thread waiting for log space (e.g | |
1733 | * a permanent log reservation with a long running transaction (see | |
1734 | * xfs_itruncate_finish)). To solve this, we must check if the directory | |
1735 | * is in the ail and use lock_nowait. If we can't lock, we need to | |
1736 | * drop the inode lock on the directory and try again. xfs_iunlock will | |
1737 | * potentially push the tail if we were holding up the log. | |
1738 | */ | |
1739 | STATIC int | |
1740 | xfs_lock_dir_and_entry( | |
1741 | xfs_inode_t *dp, | |
1da177e4 LT |
1742 | xfs_inode_t *ip) /* inode of entry 'name' */ |
1743 | { | |
1744 | int attempts; | |
1745 | xfs_ino_t e_inum; | |
1746 | xfs_inode_t *ips[2]; | |
1747 | xfs_log_item_t *lp; | |
1748 | ||
1749 | #ifdef DEBUG | |
1750 | xfs_rm_locks++; | |
1751 | #endif | |
1752 | attempts = 0; | |
1753 | ||
1754 | again: | |
f7c66ce3 | 1755 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
1da177e4 LT |
1756 | |
1757 | e_inum = ip->i_ino; | |
1758 | ||
cf441eeb | 1759 | xfs_itrace_ref(ip); |
1da177e4 LT |
1760 | |
1761 | /* | |
1762 | * We want to lock in increasing inum. Since we've already | |
1763 | * acquired the lock on the directory, we may need to release | |
1764 | * if if the inum of the entry turns out to be less. | |
1765 | */ | |
1766 | if (e_inum > dp->i_ino) { | |
1767 | /* | |
1768 | * We are already in the right order, so just | |
1769 | * lock on the inode of the entry. | |
1770 | * We need to use nowait if dp is in the AIL. | |
1771 | */ | |
1772 | ||
1773 | lp = (xfs_log_item_t *)dp->i_itemp; | |
1774 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1775 | if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { | |
1776 | attempts++; | |
1777 | #ifdef DEBUG | |
1778 | xfs_rm_attempts++; | |
1779 | #endif | |
1780 | ||
1781 | /* | |
1782 | * Unlock dp and try again. | |
1783 | * xfs_iunlock will try to push the tail | |
1784 | * if the inode is in the AIL. | |
1785 | */ | |
1786 | ||
1787 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
1788 | ||
1789 | if ((attempts % 5) == 0) { | |
1790 | delay(1); /* Don't just spin the CPU */ | |
1791 | #ifdef DEBUG | |
1792 | xfs_rm_lock_delays++; | |
1793 | #endif | |
1794 | } | |
1795 | goto again; | |
1796 | } | |
1797 | } else { | |
1798 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1799 | } | |
1800 | } else if (e_inum < dp->i_ino) { | |
1801 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
1802 | ||
1803 | ips[0] = ip; | |
1804 | ips[1] = dp; | |
cfa853e4 | 1805 | xfs_lock_inodes(ips, 2, XFS_ILOCK_EXCL); |
1da177e4 LT |
1806 | } |
1807 | /* else e_inum == dp->i_ino */ | |
1808 | /* This can happen if we're asked to lock /x/.. | |
1809 | * the entry is "..", which is also the parent directory. | |
1810 | */ | |
1811 | ||
1812 | return 0; | |
1813 | } | |
1814 | ||
1815 | #ifdef DEBUG | |
1816 | int xfs_locked_n; | |
1817 | int xfs_small_retries; | |
1818 | int xfs_middle_retries; | |
1819 | int xfs_lots_retries; | |
1820 | int xfs_lock_delays; | |
1821 | #endif | |
1822 | ||
f7c66ce3 LM |
1823 | /* |
1824 | * Bump the subclass so xfs_lock_inodes() acquires each lock with | |
1825 | * a different value | |
1826 | */ | |
1827 | static inline int | |
1828 | xfs_lock_inumorder(int lock_mode, int subclass) | |
1829 | { | |
1830 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) | |
0f1145cc | 1831 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
f7c66ce3 | 1832 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
0f1145cc | 1833 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
f7c66ce3 LM |
1834 | |
1835 | return lock_mode; | |
1836 | } | |
1837 | ||
1da177e4 LT |
1838 | /* |
1839 | * The following routine will lock n inodes in exclusive mode. | |
1840 | * We assume the caller calls us with the inodes in i_ino order. | |
1841 | * | |
1842 | * We need to detect deadlock where an inode that we lock | |
1843 | * is in the AIL and we start waiting for another inode that is locked | |
1844 | * by a thread in a long running transaction (such as truncate). This can | |
1845 | * result in deadlock since the long running trans might need to wait | |
1846 | * for the inode we just locked in order to push the tail and free space | |
1847 | * in the log. | |
1848 | */ | |
1849 | void | |
1850 | xfs_lock_inodes( | |
1851 | xfs_inode_t **ips, | |
1852 | int inodes, | |
1da177e4 LT |
1853 | uint lock_mode) |
1854 | { | |
1855 | int attempts = 0, i, j, try_lock; | |
1856 | xfs_log_item_t *lp; | |
1857 | ||
1858 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ | |
1859 | ||
cfa853e4 CH |
1860 | try_lock = 0; |
1861 | i = 0; | |
1da177e4 LT |
1862 | |
1863 | again: | |
1864 | for (; i < inodes; i++) { | |
1865 | ASSERT(ips[i]); | |
1866 | ||
1867 | if (i && (ips[i] == ips[i-1])) /* Already locked */ | |
1868 | continue; | |
1869 | ||
1870 | /* | |
1871 | * If try_lock is not set yet, make sure all locked inodes | |
1872 | * are not in the AIL. | |
1873 | * If any are, set try_lock to be used later. | |
1874 | */ | |
1875 | ||
1876 | if (!try_lock) { | |
1877 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
1878 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
1879 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1880 | try_lock++; | |
1881 | } | |
1882 | } | |
1883 | } | |
1884 | ||
1885 | /* | |
1886 | * If any of the previous locks we have locked is in the AIL, | |
1887 | * we must TRY to get the second and subsequent locks. If | |
1888 | * we can't get any, we must release all we have | |
1889 | * and try again. | |
1890 | */ | |
1891 | ||
1892 | if (try_lock) { | |
1893 | /* try_lock must be 0 if i is 0. */ | |
1894 | /* | |
1895 | * try_lock means we have an inode locked | |
1896 | * that is in the AIL. | |
1897 | */ | |
1898 | ASSERT(i != 0); | |
f7c66ce3 | 1899 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
1da177e4 LT |
1900 | attempts++; |
1901 | ||
1902 | /* | |
1903 | * Unlock all previous guys and try again. | |
1904 | * xfs_iunlock will try to push the tail | |
1905 | * if the inode is in the AIL. | |
1906 | */ | |
1907 | ||
1908 | for(j = i - 1; j >= 0; j--) { | |
1909 | ||
1910 | /* | |
1911 | * Check to see if we've already | |
1912 | * unlocked this one. | |
1913 | * Not the first one going back, | |
1914 | * and the inode ptr is the same. | |
1915 | */ | |
1916 | if ((j != (i - 1)) && ips[j] == | |
1917 | ips[j+1]) | |
1918 | continue; | |
1919 | ||
1920 | xfs_iunlock(ips[j], lock_mode); | |
1921 | } | |
1922 | ||
1923 | if ((attempts % 5) == 0) { | |
1924 | delay(1); /* Don't just spin the CPU */ | |
1925 | #ifdef DEBUG | |
1926 | xfs_lock_delays++; | |
1927 | #endif | |
1928 | } | |
1929 | i = 0; | |
1930 | try_lock = 0; | |
1931 | goto again; | |
1932 | } | |
1933 | } else { | |
f7c66ce3 | 1934 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
1da177e4 LT |
1935 | } |
1936 | } | |
1937 | ||
1938 | #ifdef DEBUG | |
1939 | if (attempts) { | |
1940 | if (attempts < 5) xfs_small_retries++; | |
1941 | else if (attempts < 100) xfs_middle_retries++; | |
1942 | else xfs_lots_retries++; | |
1943 | } else { | |
1944 | xfs_locked_n++; | |
1945 | } | |
1946 | #endif | |
1947 | } | |
1948 | ||
993386c1 | 1949 | int |
1da177e4 | 1950 | xfs_remove( |
993386c1 | 1951 | xfs_inode_t *dp, |
556b8b16 BN |
1952 | struct xfs_name *name, |
1953 | xfs_inode_t *ip) | |
1da177e4 | 1954 | { |
993386c1 | 1955 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1956 | xfs_trans_t *tp = NULL; |
8f112e3b | 1957 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
1da177e4 LT |
1958 | int error = 0; |
1959 | xfs_bmap_free_t free_list; | |
1960 | xfs_fsblock_t first_block; | |
1961 | int cancel_flags; | |
1962 | int committed; | |
1da177e4 LT |
1963 | int link_zero; |
1964 | uint resblks; | |
8f112e3b | 1965 | uint log_count; |
1da177e4 | 1966 | |
cf441eeb | 1967 | xfs_itrace_entry(dp); |
8f112e3b | 1968 | xfs_itrace_entry(ip); |
1da177e4 | 1969 | |
1da177e4 LT |
1970 | if (XFS_FORCED_SHUTDOWN(mp)) |
1971 | return XFS_ERROR(EIO); | |
1972 | ||
eb9df39d | 1973 | if (DM_EVENT_ENABLED(dp, DM_EVENT_REMOVE)) { |
556b8b16 BN |
1974 | error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dp, DM_RIGHT_NULL, |
1975 | NULL, DM_RIGHT_NULL, name->name, NULL, | |
1976 | ip->i_d.di_mode, 0, 0); | |
1da177e4 LT |
1977 | if (error) |
1978 | return error; | |
1979 | } | |
1980 | ||
1da177e4 | 1981 | error = XFS_QM_DQATTACH(mp, dp, 0); |
8f112e3b CH |
1982 | if (error) |
1983 | goto std_return; | |
1984 | ||
1985 | error = XFS_QM_DQATTACH(mp, ip, 0); | |
1986 | if (error) | |
1da177e4 | 1987 | goto std_return; |
1da177e4 | 1988 | |
8f112e3b CH |
1989 | if (is_dir) { |
1990 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); | |
1991 | log_count = XFS_DEFAULT_LOG_COUNT; | |
1992 | } else { | |
1993 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); | |
1994 | log_count = XFS_REMOVE_LOG_COUNT; | |
1995 | } | |
1da177e4 | 1996 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
8f112e3b | 1997 | |
1da177e4 LT |
1998 | /* |
1999 | * We try to get the real space reservation first, | |
2000 | * allowing for directory btree deletion(s) implying | |
2001 | * possible bmap insert(s). If we can't get the space | |
2002 | * reservation then we use 0 instead, and avoid the bmap | |
2003 | * btree insert(s) in the directory code by, if the bmap | |
2004 | * insert tries to happen, instead trimming the LAST | |
2005 | * block from the directory. | |
2006 | */ | |
2007 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
2008 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 2009 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
2010 | if (error == ENOSPC) { |
2011 | resblks = 0; | |
2012 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 2013 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
2014 | } |
2015 | if (error) { | |
2016 | ASSERT(error != ENOSPC); | |
8f112e3b CH |
2017 | cancel_flags = 0; |
2018 | goto out_trans_cancel; | |
1da177e4 LT |
2019 | } |
2020 | ||
e9ed9d22 | 2021 | error = xfs_lock_dir_and_entry(dp, ip); |
8f112e3b CH |
2022 | if (error) |
2023 | goto out_trans_cancel; | |
1da177e4 LT |
2024 | |
2025 | /* | |
2026 | * At this point, we've gotten both the directory and the entry | |
2027 | * inodes locked. | |
2028 | */ | |
5df78e73 | 2029 | IHOLD(ip); |
1da177e4 | 2030 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
82dab941 CH |
2031 | |
2032 | IHOLD(dp); | |
2033 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
1da177e4 | 2034 | |
8f112e3b CH |
2035 | /* |
2036 | * If we're removing a directory perform some additional validation. | |
2037 | */ | |
2038 | if (is_dir) { | |
2039 | ASSERT(ip->i_d.di_nlink >= 2); | |
2040 | if (ip->i_d.di_nlink != 2) { | |
2041 | error = XFS_ERROR(ENOTEMPTY); | |
2042 | goto out_trans_cancel; | |
2043 | } | |
2044 | if (!xfs_dir_isempty(ip)) { | |
2045 | error = XFS_ERROR(ENOTEMPTY); | |
2046 | goto out_trans_cancel; | |
2047 | } | |
2048 | } | |
2049 | ||
1da177e4 LT |
2050 | /* |
2051 | * Entry must exist since we did a lookup in xfs_lock_dir_and_entry. | |
2052 | */ | |
2053 | XFS_BMAP_INIT(&free_list, &first_block); | |
556b8b16 | 2054 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
d4377d84 | 2055 | &first_block, &free_list, resblks); |
1da177e4 LT |
2056 | if (error) { |
2057 | ASSERT(error != ENOENT); | |
8f112e3b | 2058 | goto out_bmap_cancel; |
1da177e4 LT |
2059 | } |
2060 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2061 | ||
8f112e3b CH |
2062 | /* |
2063 | * Bump the in memory generation count on the parent | |
2064 | * directory so that other can know that it has changed. | |
2065 | */ | |
1da177e4 LT |
2066 | dp->i_gen++; |
2067 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
2068 | ||
8f112e3b CH |
2069 | if (is_dir) { |
2070 | /* | |
2071 | * Drop the link from ip's "..". | |
2072 | */ | |
2073 | error = xfs_droplink(tp, dp); | |
2074 | if (error) | |
2075 | goto out_bmap_cancel; | |
2076 | ||
2077 | /* | |
2078 | * Drop the link from dp to ip. | |
2079 | */ | |
2080 | error = xfs_droplink(tp, ip); | |
2081 | if (error) | |
2082 | goto out_bmap_cancel; | |
2083 | } else { | |
2084 | /* | |
2085 | * When removing a non-directory we need to log the parent | |
2086 | * inode here for the i_gen update. For a directory this is | |
2087 | * done implicitly by the xfs_droplink call for the ".." entry. | |
2088 | */ | |
2089 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1da177e4 LT |
2090 | } |
2091 | ||
8f112e3b CH |
2092 | /* |
2093 | * Drop the "." link from ip to self. | |
2094 | */ | |
2095 | error = xfs_droplink(tp, ip); | |
2096 | if (error) | |
2097 | goto out_bmap_cancel; | |
2098 | ||
2099 | /* | |
2100 | * Determine if this is the last link while | |
1da177e4 LT |
2101 | * we are in the transaction. |
2102 | */ | |
8f112e3b | 2103 | link_zero = (ip->i_d.di_nlink == 0); |
1da177e4 | 2104 | |
1da177e4 LT |
2105 | /* |
2106 | * If this is a synchronous mount, make sure that the | |
2107 | * remove transaction goes to disk before returning to | |
2108 | * the user. | |
2109 | */ | |
8f112e3b | 2110 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 2111 | xfs_trans_set_sync(tp); |
1da177e4 | 2112 | |
f7c99b6f | 2113 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
8f112e3b CH |
2114 | if (error) |
2115 | goto out_bmap_cancel; | |
1da177e4 | 2116 | |
1c72bf90 | 2117 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
5df78e73 | 2118 | if (error) |
1da177e4 | 2119 | goto std_return; |
1da177e4 | 2120 | |
2a82b8be DC |
2121 | /* |
2122 | * If we are using filestreams, kill the stream association. | |
2123 | * If the file is still open it may get a new one but that | |
2124 | * will get killed on last close in xfs_close() so we don't | |
2125 | * have to worry about that. | |
2126 | */ | |
8f112e3b | 2127 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
2a82b8be DC |
2128 | xfs_filestream_deassociate(ip); |
2129 | ||
cf441eeb | 2130 | xfs_itrace_exit(ip); |
8f112e3b | 2131 | xfs_itrace_exit(dp); |
1da177e4 | 2132 | |
1da177e4 | 2133 | std_return: |
eb9df39d | 2134 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTREMOVE)) { |
8f112e3b CH |
2135 | XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE, dp, DM_RIGHT_NULL, |
2136 | NULL, DM_RIGHT_NULL, name->name, NULL, | |
2137 | ip->i_d.di_mode, error, 0); | |
1da177e4 | 2138 | } |
8f112e3b | 2139 | |
1da177e4 LT |
2140 | return error; |
2141 | ||
8f112e3b | 2142 | out_bmap_cancel: |
1da177e4 LT |
2143 | xfs_bmap_cancel(&free_list); |
2144 | cancel_flags |= XFS_TRANS_ABORT; | |
8f112e3b | 2145 | out_trans_cancel: |
1da177e4 LT |
2146 | xfs_trans_cancel(tp, cancel_flags); |
2147 | goto std_return; | |
1da177e4 LT |
2148 | } |
2149 | ||
993386c1 | 2150 | int |
1da177e4 | 2151 | xfs_link( |
993386c1 | 2152 | xfs_inode_t *tdp, |
a3da7896 | 2153 | xfs_inode_t *sip, |
556b8b16 | 2154 | struct xfs_name *target_name) |
1da177e4 | 2155 | { |
993386c1 | 2156 | xfs_mount_t *mp = tdp->i_mount; |
1da177e4 | 2157 | xfs_trans_t *tp; |
1da177e4 LT |
2158 | xfs_inode_t *ips[2]; |
2159 | int error; | |
2160 | xfs_bmap_free_t free_list; | |
2161 | xfs_fsblock_t first_block; | |
2162 | int cancel_flags; | |
2163 | int committed; | |
1da177e4 | 2164 | int resblks; |
1da177e4 | 2165 | |
cf441eeb | 2166 | xfs_itrace_entry(tdp); |
a3da7896 | 2167 | xfs_itrace_entry(sip); |
1da177e4 | 2168 | |
a3da7896 | 2169 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
1da177e4 | 2170 | |
1da177e4 LT |
2171 | if (XFS_FORCED_SHUTDOWN(mp)) |
2172 | return XFS_ERROR(EIO); | |
2173 | ||
eb9df39d | 2174 | if (DM_EVENT_ENABLED(tdp, DM_EVENT_LINK)) { |
1da177e4 | 2175 | error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK, |
bc4ac74a CH |
2176 | tdp, DM_RIGHT_NULL, |
2177 | sip, DM_RIGHT_NULL, | |
556b8b16 | 2178 | target_name->name, NULL, 0, 0, 0); |
1da177e4 LT |
2179 | if (error) |
2180 | return error; | |
2181 | } | |
2182 | ||
2183 | /* Return through std_return after this point. */ | |
2184 | ||
2185 | error = XFS_QM_DQATTACH(mp, sip, 0); | |
2186 | if (!error && sip != tdp) | |
2187 | error = XFS_QM_DQATTACH(mp, tdp, 0); | |
2188 | if (error) | |
2189 | goto std_return; | |
2190 | ||
2191 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); | |
2192 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 2193 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
1da177e4 LT |
2194 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
2195 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
2196 | if (error == ENOSPC) { | |
2197 | resblks = 0; | |
2198 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, | |
2199 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
2200 | } | |
2201 | if (error) { | |
2202 | cancel_flags = 0; | |
2203 | goto error_return; | |
2204 | } | |
2205 | ||
2206 | if (sip->i_ino < tdp->i_ino) { | |
2207 | ips[0] = sip; | |
2208 | ips[1] = tdp; | |
2209 | } else { | |
2210 | ips[0] = tdp; | |
2211 | ips[1] = sip; | |
2212 | } | |
2213 | ||
cfa853e4 | 2214 | xfs_lock_inodes(ips, 2, XFS_ILOCK_EXCL); |
1da177e4 LT |
2215 | |
2216 | /* | |
2217 | * Increment vnode ref counts since xfs_trans_commit & | |
2218 | * xfs_trans_cancel will both unlock the inodes and | |
2219 | * decrement the associated ref counts. | |
2220 | */ | |
a3da7896 CH |
2221 | IHOLD(sip); |
2222 | IHOLD(tdp); | |
1da177e4 LT |
2223 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); |
2224 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); | |
2225 | ||
2226 | /* | |
2227 | * If the source has too many links, we can't make any more to it. | |
2228 | */ | |
2229 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { | |
2230 | error = XFS_ERROR(EMLINK); | |
2231 | goto error_return; | |
2232 | } | |
2233 | ||
365ca83d NS |
2234 | /* |
2235 | * If we are using project inheritance, we only allow hard link | |
2236 | * creation in our tree when the project IDs are the same; else | |
2237 | * the tree quota mechanism could be circumvented. | |
2238 | */ | |
2239 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
2240 | (tdp->i_d.di_projid != sip->i_d.di_projid))) { | |
b1ecdda9 | 2241 | error = XFS_ERROR(EXDEV); |
365ca83d NS |
2242 | goto error_return; |
2243 | } | |
2244 | ||
556b8b16 BN |
2245 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
2246 | if (error) | |
1da177e4 LT |
2247 | goto error_return; |
2248 | ||
2249 | XFS_BMAP_INIT(&free_list, &first_block); | |
2250 | ||
556b8b16 BN |
2251 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
2252 | &first_block, &free_list, resblks); | |
1da177e4 LT |
2253 | if (error) |
2254 | goto abort_return; | |
2255 | xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2256 | tdp->i_gen++; | |
2257 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); | |
2258 | ||
2259 | error = xfs_bumplink(tp, sip); | |
b71d300c | 2260 | if (error) |
1da177e4 | 2261 | goto abort_return; |
1da177e4 LT |
2262 | |
2263 | /* | |
2264 | * If this is a synchronous mount, make sure that the | |
2265 | * link transaction goes to disk before returning to | |
2266 | * the user. | |
2267 | */ | |
2268 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2269 | xfs_trans_set_sync(tp); | |
2270 | } | |
2271 | ||
f7c99b6f | 2272 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
2273 | if (error) { |
2274 | xfs_bmap_cancel(&free_list); | |
2275 | goto abort_return; | |
2276 | } | |
2277 | ||
1c72bf90 | 2278 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
b71d300c | 2279 | if (error) |
1da177e4 | 2280 | goto std_return; |
1da177e4 LT |
2281 | |
2282 | /* Fall through to std_return with error = 0. */ | |
2283 | std_return: | |
eb9df39d | 2284 | if (DM_EVENT_ENABLED(sip, DM_EVENT_POSTLINK)) { |
1da177e4 | 2285 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK, |
bc4ac74a CH |
2286 | tdp, DM_RIGHT_NULL, |
2287 | sip, DM_RIGHT_NULL, | |
556b8b16 | 2288 | target_name->name, NULL, 0, error, 0); |
1da177e4 LT |
2289 | } |
2290 | return error; | |
2291 | ||
2292 | abort_return: | |
2293 | cancel_flags |= XFS_TRANS_ABORT; | |
2294 | /* FALLTHROUGH */ | |
014c2544 | 2295 | |
1da177e4 LT |
2296 | error_return: |
2297 | xfs_trans_cancel(tp, cancel_flags); | |
1da177e4 LT |
2298 | goto std_return; |
2299 | } | |
b71d300c AD |
2300 | |
2301 | ||
993386c1 | 2302 | int |
1da177e4 | 2303 | xfs_mkdir( |
993386c1 | 2304 | xfs_inode_t *dp, |
556b8b16 | 2305 | struct xfs_name *dir_name, |
3e5daf05 | 2306 | mode_t mode, |
979ebab1 | 2307 | xfs_inode_t **ipp, |
1da177e4 LT |
2308 | cred_t *credp) |
2309 | { | |
993386c1 | 2310 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 2311 | xfs_inode_t *cdp; /* inode of created dir */ |
1da177e4 | 2312 | xfs_trans_t *tp; |
1da177e4 LT |
2313 | int cancel_flags; |
2314 | int error; | |
2315 | int committed; | |
2316 | xfs_bmap_free_t free_list; | |
2317 | xfs_fsblock_t first_block; | |
993386c1 | 2318 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
2319 | boolean_t created = B_FALSE; |
2320 | int dm_event_sent = 0; | |
2321 | xfs_prid_t prid; | |
2322 | struct xfs_dquot *udqp, *gdqp; | |
2323 | uint resblks; | |
1da177e4 LT |
2324 | |
2325 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2326 | return XFS_ERROR(EIO); | |
2327 | ||
1da177e4 | 2328 | tp = NULL; |
1da177e4 | 2329 | |
eb9df39d | 2330 | if (DM_EVENT_ENABLED(dp, DM_EVENT_CREATE)) { |
1da177e4 | 2331 | error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, |
bc4ac74a | 2332 | dp, DM_RIGHT_NULL, NULL, |
556b8b16 | 2333 | DM_RIGHT_NULL, dir_name->name, NULL, |
3e5daf05 | 2334 | mode, 0, 0); |
1da177e4 LT |
2335 | if (error) |
2336 | return error; | |
2337 | dm_event_sent = 1; | |
2338 | } | |
2339 | ||
2340 | /* Return through std_return after this point. */ | |
2341 | ||
cf441eeb | 2342 | xfs_itrace_entry(dp); |
1da177e4 LT |
2343 | |
2344 | mp = dp->i_mount; | |
2345 | udqp = gdqp = NULL; | |
365ca83d NS |
2346 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
2347 | prid = dp->i_d.di_projid; | |
1da177e4 LT |
2348 | else |
2349 | prid = (xfs_prid_t)dfltprid; | |
2350 | ||
2351 | /* | |
2352 | * Make sure that we have allocated dquot(s) on disk. | |
2353 | */ | |
2354 | error = XFS_QM_DQVOPALLOC(mp, dp, | |
c8ad20ff | 2355 | current_fsuid(credp), current_fsgid(credp), prid, |
1da177e4 LT |
2356 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
2357 | if (error) | |
2358 | goto std_return; | |
2359 | ||
2360 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); | |
2361 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 2362 | resblks = XFS_MKDIR_SPACE_RES(mp, dir_name->len); |
1da177e4 LT |
2363 | error = xfs_trans_reserve(tp, resblks, XFS_MKDIR_LOG_RES(mp), 0, |
2364 | XFS_TRANS_PERM_LOG_RES, XFS_MKDIR_LOG_COUNT); | |
2365 | if (error == ENOSPC) { | |
2366 | resblks = 0; | |
2367 | error = xfs_trans_reserve(tp, 0, XFS_MKDIR_LOG_RES(mp), 0, | |
2368 | XFS_TRANS_PERM_LOG_RES, | |
2369 | XFS_MKDIR_LOG_COUNT); | |
2370 | } | |
2371 | if (error) { | |
2372 | cancel_flags = 0; | |
1da177e4 LT |
2373 | goto error_return; |
2374 | } | |
2375 | ||
f7c66ce3 | 2376 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 2377 | unlock_dp_on_error = B_TRUE; |
1da177e4 LT |
2378 | |
2379 | /* | |
2380 | * Check for directory link count overflow. | |
2381 | */ | |
2382 | if (dp->i_d.di_nlink >= XFS_MAXLINK) { | |
2383 | error = XFS_ERROR(EMLINK); | |
2384 | goto error_return; | |
2385 | } | |
2386 | ||
2387 | /* | |
2388 | * Reserve disk quota and the inode. | |
2389 | */ | |
2390 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); | |
2391 | if (error) | |
2392 | goto error_return; | |
2393 | ||
556b8b16 BN |
2394 | error = xfs_dir_canenter(tp, dp, dir_name, resblks); |
2395 | if (error) | |
1da177e4 LT |
2396 | goto error_return; |
2397 | /* | |
2398 | * create the directory inode. | |
2399 | */ | |
3e5daf05 | 2400 | error = xfs_dir_ialloc(&tp, dp, mode, 2, |
1da177e4 LT |
2401 | 0, credp, prid, resblks > 0, |
2402 | &cdp, NULL); | |
2403 | if (error) { | |
2404 | if (error == ENOSPC) | |
2405 | goto error_return; | |
2406 | goto abort_return; | |
2407 | } | |
cf441eeb | 2408 | xfs_itrace_ref(cdp); |
1da177e4 LT |
2409 | |
2410 | /* | |
2411 | * Now we add the directory inode to the transaction. | |
2412 | * We waited until now since xfs_dir_ialloc might start | |
2413 | * a new transaction. Had we joined the transaction | |
993386c1 CH |
2414 | * earlier, the locks might have gotten released. An error |
2415 | * from here on will result in the transaction cancel | |
2416 | * unlocking dp so don't do it explicitly in the error path. | |
1da177e4 | 2417 | */ |
979ebab1 | 2418 | IHOLD(dp); |
1da177e4 | 2419 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 2420 | unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
2421 | |
2422 | XFS_BMAP_INIT(&free_list, &first_block); | |
2423 | ||
556b8b16 BN |
2424 | error = xfs_dir_createname(tp, dp, dir_name, cdp->i_ino, |
2425 | &first_block, &free_list, resblks ? | |
2426 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
2427 | if (error) { |
2428 | ASSERT(error != ENOSPC); | |
2429 | goto error1; | |
2430 | } | |
2431 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2432 | ||
2433 | /* | |
2434 | * Bump the in memory version number of the parent directory | |
2435 | * so that other processes accessing it will recognize that | |
2436 | * the directory has changed. | |
2437 | */ | |
2438 | dp->i_gen++; | |
2439 | ||
f6c2d1fa NS |
2440 | error = xfs_dir_init(tp, cdp, dp); |
2441 | if (error) | |
1da177e4 | 2442 | goto error2; |
1da177e4 LT |
2443 | |
2444 | cdp->i_gen = 1; | |
2445 | error = xfs_bumplink(tp, dp); | |
f6c2d1fa | 2446 | if (error) |
1da177e4 | 2447 | goto error2; |
1da177e4 | 2448 | |
1da177e4 LT |
2449 | created = B_TRUE; |
2450 | ||
979ebab1 | 2451 | *ipp = cdp; |
1da177e4 LT |
2452 | IHOLD(cdp); |
2453 | ||
2454 | /* | |
2455 | * Attach the dquots to the new inode and modify the icount incore. | |
2456 | */ | |
2457 | XFS_QM_DQVOPCREATE(mp, tp, cdp, udqp, gdqp); | |
2458 | ||
2459 | /* | |
2460 | * If this is a synchronous mount, make sure that the | |
2461 | * mkdir transaction goes to disk before returning to | |
2462 | * the user. | |
2463 | */ | |
2464 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2465 | xfs_trans_set_sync(tp); | |
2466 | } | |
2467 | ||
f7c99b6f | 2468 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2469 | if (error) { |
2470 | IRELE(cdp); | |
2471 | goto error2; | |
2472 | } | |
2473 | ||
1c72bf90 | 2474 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2475 | XFS_QM_DQRELE(mp, udqp); |
2476 | XFS_QM_DQRELE(mp, gdqp); | |
2477 | if (error) { | |
2478 | IRELE(cdp); | |
2479 | } | |
2480 | ||
2481 | /* Fall through to std_return with error = 0 or errno from | |
2482 | * xfs_trans_commit. */ | |
2483 | ||
2484 | std_return: | |
eb9df39d | 2485 | if ((created || (error != 0 && dm_event_sent != 0)) && |
993386c1 | 2486 | DM_EVENT_ENABLED(dp, DM_EVENT_POSTCREATE)) { |
1da177e4 | 2487 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, |
bc4ac74a CH |
2488 | dp, DM_RIGHT_NULL, |
2489 | created ? cdp : NULL, | |
1da177e4 | 2490 | DM_RIGHT_NULL, |
556b8b16 | 2491 | dir_name->name, NULL, |
3e5daf05 | 2492 | mode, error, 0); |
1da177e4 LT |
2493 | } |
2494 | return error; | |
2495 | ||
2496 | error2: | |
2497 | error1: | |
2498 | xfs_bmap_cancel(&free_list); | |
2499 | abort_return: | |
2500 | cancel_flags |= XFS_TRANS_ABORT; | |
2501 | error_return: | |
2502 | xfs_trans_cancel(tp, cancel_flags); | |
2503 | XFS_QM_DQRELE(mp, udqp); | |
2504 | XFS_QM_DQRELE(mp, gdqp); | |
2505 | ||
993386c1 | 2506 | if (unlock_dp_on_error) |
1da177e4 | 2507 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
1da177e4 LT |
2508 | |
2509 | goto std_return; | |
2510 | } | |
2511 | ||
993386c1 | 2512 | int |
1da177e4 | 2513 | xfs_symlink( |
993386c1 | 2514 | xfs_inode_t *dp, |
556b8b16 BN |
2515 | struct xfs_name *link_name, |
2516 | const char *target_path, | |
3e5daf05 | 2517 | mode_t mode, |
3937be5b | 2518 | xfs_inode_t **ipp, |
1da177e4 LT |
2519 | cred_t *credp) |
2520 | { | |
993386c1 | 2521 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 2522 | xfs_trans_t *tp; |
1da177e4 LT |
2523 | xfs_inode_t *ip; |
2524 | int error; | |
2525 | int pathlen; | |
2526 | xfs_bmap_free_t free_list; | |
2527 | xfs_fsblock_t first_block; | |
993386c1 | 2528 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
2529 | uint cancel_flags; |
2530 | int committed; | |
2531 | xfs_fileoff_t first_fsb; | |
2532 | xfs_filblks_t fs_blocks; | |
2533 | int nmaps; | |
2534 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
2535 | xfs_daddr_t d; | |
556b8b16 | 2536 | const char *cur_chunk; |
1da177e4 LT |
2537 | int byte_cnt; |
2538 | int n; | |
2539 | xfs_buf_t *bp; | |
2540 | xfs_prid_t prid; | |
2541 | struct xfs_dquot *udqp, *gdqp; | |
2542 | uint resblks; | |
1da177e4 | 2543 | |
3937be5b | 2544 | *ipp = NULL; |
1da177e4 LT |
2545 | error = 0; |
2546 | ip = NULL; | |
2547 | tp = NULL; | |
2548 | ||
cf441eeb | 2549 | xfs_itrace_entry(dp); |
1da177e4 LT |
2550 | |
2551 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2552 | return XFS_ERROR(EIO); | |
2553 | ||
1da177e4 LT |
2554 | /* |
2555 | * Check component lengths of the target path name. | |
2556 | */ | |
2557 | pathlen = strlen(target_path); | |
2558 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
2559 | return XFS_ERROR(ENAMETOOLONG); | |
1da177e4 | 2560 | |
eb9df39d | 2561 | if (DM_EVENT_ENABLED(dp, DM_EVENT_SYMLINK)) { |
bc4ac74a | 2562 | error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dp, |
1da177e4 | 2563 | DM_RIGHT_NULL, NULL, DM_RIGHT_NULL, |
556b8b16 | 2564 | link_name->name, target_path, 0, 0, 0); |
1da177e4 LT |
2565 | if (error) |
2566 | return error; | |
2567 | } | |
2568 | ||
2569 | /* Return through std_return after this point. */ | |
2570 | ||
2571 | udqp = gdqp = NULL; | |
365ca83d NS |
2572 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
2573 | prid = dp->i_d.di_projid; | |
1da177e4 LT |
2574 | else |
2575 | prid = (xfs_prid_t)dfltprid; | |
2576 | ||
2577 | /* | |
2578 | * Make sure that we have allocated dquot(s) on disk. | |
2579 | */ | |
2580 | error = XFS_QM_DQVOPALLOC(mp, dp, | |
c8ad20ff | 2581 | current_fsuid(credp), current_fsgid(credp), prid, |
1da177e4 LT |
2582 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
2583 | if (error) | |
2584 | goto std_return; | |
2585 | ||
2586 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
2587 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
2588 | /* | |
2589 | * The symlink will fit into the inode data fork? | |
2590 | * There can't be any attributes so we get the whole variable part. | |
2591 | */ | |
2592 | if (pathlen <= XFS_LITINO(mp)) | |
2593 | fs_blocks = 0; | |
2594 | else | |
2595 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); | |
556b8b16 | 2596 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
1da177e4 LT |
2597 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
2598 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
2599 | if (error == ENOSPC && fs_blocks == 0) { | |
2600 | resblks = 0; | |
2601 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, | |
2602 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
2603 | } | |
2604 | if (error) { | |
2605 | cancel_flags = 0; | |
1da177e4 LT |
2606 | goto error_return; |
2607 | } | |
2608 | ||
f7c66ce3 | 2609 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 2610 | unlock_dp_on_error = B_TRUE; |
1da177e4 LT |
2611 | |
2612 | /* | |
2613 | * Check whether the directory allows new symlinks or not. | |
2614 | */ | |
2615 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
2616 | error = XFS_ERROR(EPERM); | |
2617 | goto error_return; | |
2618 | } | |
2619 | ||
2620 | /* | |
2621 | * Reserve disk quota : blocks and inode. | |
2622 | */ | |
2623 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); | |
2624 | if (error) | |
2625 | goto error_return; | |
2626 | ||
2627 | /* | |
2628 | * Check for ability to enter directory entry, if no space reserved. | |
2629 | */ | |
556b8b16 BN |
2630 | error = xfs_dir_canenter(tp, dp, link_name, resblks); |
2631 | if (error) | |
1da177e4 LT |
2632 | goto error_return; |
2633 | /* | |
2634 | * Initialize the bmap freelist prior to calling either | |
2635 | * bmapi or the directory create code. | |
2636 | */ | |
2637 | XFS_BMAP_INIT(&free_list, &first_block); | |
2638 | ||
2639 | /* | |
2640 | * Allocate an inode for the symlink. | |
2641 | */ | |
3e5daf05 | 2642 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), |
1da177e4 LT |
2643 | 1, 0, credp, prid, resblks > 0, &ip, NULL); |
2644 | if (error) { | |
2645 | if (error == ENOSPC) | |
2646 | goto error_return; | |
2647 | goto error1; | |
2648 | } | |
cf441eeb | 2649 | xfs_itrace_ref(ip); |
1da177e4 | 2650 | |
993386c1 CH |
2651 | /* |
2652 | * An error after we've joined dp to the transaction will result in the | |
2653 | * transaction cancel unlocking dp so don't do it explicitly in the | |
2654 | * error path. | |
2655 | */ | |
3937be5b | 2656 | IHOLD(dp); |
1da177e4 | 2657 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 2658 | unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
2659 | |
2660 | /* | |
2661 | * Also attach the dquot(s) to it, if applicable. | |
2662 | */ | |
2663 | XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp); | |
2664 | ||
2665 | if (resblks) | |
2666 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
2667 | /* | |
2668 | * If the symlink will fit into the inode, write it inline. | |
2669 | */ | |
2670 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
2671 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
2672 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
2673 | ip->i_d.di_size = pathlen; | |
2674 | ||
2675 | /* | |
2676 | * The inode was initially created in extent format. | |
2677 | */ | |
2678 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
2679 | ip->i_df.if_flags |= XFS_IFINLINE; | |
2680 | ||
2681 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
2682 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
2683 | ||
2684 | } else { | |
2685 | first_fsb = 0; | |
2686 | nmaps = SYMLINK_MAPS; | |
2687 | ||
2688 | error = xfs_bmapi(tp, ip, first_fsb, fs_blocks, | |
2689 | XFS_BMAPI_WRITE | XFS_BMAPI_METADATA, | |
2690 | &first_block, resblks, mval, &nmaps, | |
3e57ecf6 | 2691 | &free_list, NULL); |
1da177e4 LT |
2692 | if (error) { |
2693 | goto error1; | |
2694 | } | |
2695 | ||
2696 | if (resblks) | |
2697 | resblks -= fs_blocks; | |
2698 | ip->i_d.di_size = pathlen; | |
2699 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
2700 | ||
2701 | cur_chunk = target_path; | |
2702 | for (n = 0; n < nmaps; n++) { | |
2703 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
2704 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
2705 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
2706 | BTOBB(byte_cnt), 0); | |
2707 | ASSERT(bp && !XFS_BUF_GETERROR(bp)); | |
2708 | if (pathlen < byte_cnt) { | |
2709 | byte_cnt = pathlen; | |
2710 | } | |
2711 | pathlen -= byte_cnt; | |
2712 | ||
2713 | memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt); | |
2714 | cur_chunk += byte_cnt; | |
2715 | ||
2716 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); | |
2717 | } | |
2718 | } | |
2719 | ||
2720 | /* | |
2721 | * Create the directory entry for the symlink. | |
2722 | */ | |
556b8b16 BN |
2723 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, |
2724 | &first_block, &free_list, resblks); | |
f6c2d1fa | 2725 | if (error) |
1da177e4 | 2726 | goto error1; |
1da177e4 LT |
2727 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
2728 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
2729 | ||
2730 | /* | |
2731 | * Bump the in memory version number of the parent directory | |
2732 | * so that other processes accessing it will recognize that | |
2733 | * the directory has changed. | |
2734 | */ | |
2735 | dp->i_gen++; | |
2736 | ||
2737 | /* | |
2738 | * If this is a synchronous mount, make sure that the | |
2739 | * symlink transaction goes to disk before returning to | |
2740 | * the user. | |
2741 | */ | |
2742 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2743 | xfs_trans_set_sync(tp); | |
2744 | } | |
2745 | ||
2746 | /* | |
2747 | * xfs_trans_commit normally decrements the vnode ref count | |
2748 | * when it unlocks the inode. Since we want to return the | |
2749 | * vnode to the caller, we bump the vnode ref count now. | |
2750 | */ | |
2751 | IHOLD(ip); | |
2752 | ||
f7c99b6f | 2753 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2754 | if (error) { |
2755 | goto error2; | |
2756 | } | |
1c72bf90 | 2757 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2758 | XFS_QM_DQRELE(mp, udqp); |
2759 | XFS_QM_DQRELE(mp, gdqp); | |
2760 | ||
2761 | /* Fall through to std_return with error = 0 or errno from | |
2762 | * xfs_trans_commit */ | |
2763 | std_return: | |
993386c1 | 2764 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTSYMLINK)) { |
1da177e4 | 2765 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK, |
bc4ac74a CH |
2766 | dp, DM_RIGHT_NULL, |
2767 | error ? NULL : ip, | |
556b8b16 BN |
2768 | DM_RIGHT_NULL, link_name->name, |
2769 | target_path, 0, error, 0); | |
1da177e4 LT |
2770 | } |
2771 | ||
3937be5b CH |
2772 | if (!error) |
2773 | *ipp = ip; | |
1da177e4 LT |
2774 | return error; |
2775 | ||
2776 | error2: | |
2777 | IRELE(ip); | |
2778 | error1: | |
2779 | xfs_bmap_cancel(&free_list); | |
2780 | cancel_flags |= XFS_TRANS_ABORT; | |
2781 | error_return: | |
2782 | xfs_trans_cancel(tp, cancel_flags); | |
2783 | XFS_QM_DQRELE(mp, udqp); | |
2784 | XFS_QM_DQRELE(mp, gdqp); | |
2785 | ||
993386c1 | 2786 | if (unlock_dp_on_error) |
1da177e4 | 2787 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
1da177e4 LT |
2788 | |
2789 | goto std_return; | |
2790 | } | |
2791 | ||
993386c1 | 2792 | int |
1da177e4 | 2793 | xfs_inode_flush( |
993386c1 | 2794 | xfs_inode_t *ip, |
1da177e4 LT |
2795 | int flags) |
2796 | { | |
993386c1 | 2797 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
2798 | int error = 0; |
2799 | ||
1da177e4 LT |
2800 | if (XFS_FORCED_SHUTDOWN(mp)) |
2801 | return XFS_ERROR(EIO); | |
2802 | ||
2803 | /* | |
2804 | * Bypass inodes which have already been cleaned by | |
2805 | * the inode flush clustering code inside xfs_iflush | |
2806 | */ | |
33540408 | 2807 | if (xfs_inode_clean(ip)) |
1da177e4 LT |
2808 | return 0; |
2809 | ||
1da177e4 LT |
2810 | /* |
2811 | * We make this non-blocking if the inode is contended, | |
2812 | * return EAGAIN to indicate to the caller that they | |
2813 | * did not succeed. This prevents the flush path from | |
2814 | * blocking on inodes inside another operation right | |
2815 | * now, they get caught later by xfs_sync. | |
2816 | */ | |
a3f74ffb DC |
2817 | if (flags & FLUSH_SYNC) { |
2818 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
2819 | xfs_iflock(ip); | |
2820 | } else if (xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) { | |
2821 | if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip)) { | |
2822 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
1da177e4 LT |
2823 | return EAGAIN; |
2824 | } | |
a3f74ffb DC |
2825 | } else { |
2826 | return EAGAIN; | |
1da177e4 LT |
2827 | } |
2828 | ||
a3f74ffb DC |
2829 | error = xfs_iflush(ip, (flags & FLUSH_SYNC) ? XFS_IFLUSH_SYNC |
2830 | : XFS_IFLUSH_ASYNC_NOBLOCK); | |
2831 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
2832 | ||
1da177e4 LT |
2833 | return error; |
2834 | } | |
2835 | ||
993386c1 | 2836 | |
1da177e4 | 2837 | int |
993386c1 CH |
2838 | xfs_set_dmattrs( |
2839 | xfs_inode_t *ip, | |
1da177e4 | 2840 | u_int evmask, |
993386c1 | 2841 | u_int16_t state) |
1da177e4 | 2842 | { |
993386c1 | 2843 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 2844 | xfs_trans_t *tp; |
1da177e4 LT |
2845 | int error; |
2846 | ||
2847 | if (!capable(CAP_SYS_ADMIN)) | |
2848 | return XFS_ERROR(EPERM); | |
2849 | ||
1da177e4 LT |
2850 | if (XFS_FORCED_SHUTDOWN(mp)) |
2851 | return XFS_ERROR(EIO); | |
2852 | ||
2853 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
2854 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
2855 | if (error) { | |
2856 | xfs_trans_cancel(tp, 0); | |
2857 | return error; | |
2858 | } | |
2859 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2860 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2861 | ||
613d7043 CH |
2862 | ip->i_d.di_dmevmask = evmask; |
2863 | ip->i_d.di_dmstate = state; | |
1da177e4 LT |
2864 | |
2865 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
2866 | IHOLD(ip); | |
1c72bf90 | 2867 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
2868 | |
2869 | return error; | |
2870 | } | |
2871 | ||
993386c1 | 2872 | int |
1da177e4 | 2873 | xfs_reclaim( |
993386c1 | 2874 | xfs_inode_t *ip) |
1da177e4 | 2875 | { |
e4f75291 | 2876 | bhv_vnode_t *vp = VFS_I(ip); |
1da177e4 | 2877 | |
cf441eeb | 2878 | xfs_itrace_entry(ip); |
1da177e4 LT |
2879 | |
2880 | ASSERT(!VN_MAPPED(vp)); | |
2881 | ||
2882 | /* bad inode, get out here ASAP */ | |
2883 | if (VN_BAD(vp)) { | |
2884 | xfs_ireclaim(ip); | |
2885 | return 0; | |
2886 | } | |
2887 | ||
b677c210 | 2888 | vn_iowait(ip); |
1da177e4 | 2889 | |
51c91ed5 | 2890 | ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); |
1da177e4 | 2891 | |
42fe2b1f CH |
2892 | /* |
2893 | * Make sure the atime in the XFS inode is correct before freeing the | |
2894 | * Linux inode. | |
2895 | */ | |
2896 | xfs_synchronize_atime(ip); | |
1da177e4 | 2897 | |
4c60658e DC |
2898 | /* |
2899 | * If we have nothing to flush with this inode then complete the | |
2900 | * teardown now, otherwise break the link between the xfs inode and the | |
2901 | * linux inode and clean up the xfs inode later. This avoids flushing | |
2902 | * the inode to disk during the delete operation itself. | |
2903 | * | |
2904 | * When breaking the link, we need to set the XFS_IRECLAIMABLE flag | |
2905 | * first to ensure that xfs_iunpin() will never see an xfs inode | |
2906 | * that has a linux inode being reclaimed. Synchronisation is provided | |
2907 | * by the i_flags_lock. | |
1da177e4 LT |
2908 | */ |
2909 | if (!ip->i_update_core && (ip->i_itemp == NULL)) { | |
2910 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2911 | xfs_iflock(ip); | |
2912 | return xfs_finish_reclaim(ip, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC); | |
2913 | } else { | |
2914 | xfs_mount_t *mp = ip->i_mount; | |
2915 | ||
4c60658e | 2916 | /* Protect sync and unpin from us */ |
1da177e4 | 2917 | XFS_MOUNT_ILOCK(mp); |
4c60658e DC |
2918 | spin_lock(&ip->i_flags_lock); |
2919 | __xfs_iflags_set(ip, XFS_IRECLAIMABLE); | |
863890cd | 2920 | vp->i_private = NULL; |
739bfb2a | 2921 | ip->i_vnode = NULL; |
4c60658e | 2922 | spin_unlock(&ip->i_flags_lock); |
1da177e4 | 2923 | list_add_tail(&ip->i_reclaim, &mp->m_del_inodes); |
1da177e4 LT |
2924 | XFS_MOUNT_IUNLOCK(mp); |
2925 | } | |
2926 | return 0; | |
2927 | } | |
2928 | ||
2929 | int | |
2930 | xfs_finish_reclaim( | |
2931 | xfs_inode_t *ip, | |
2932 | int locked, | |
2933 | int sync_mode) | |
2934 | { | |
da353b0d | 2935 | xfs_perag_t *pag = xfs_get_perag(ip->i_mount, ip->i_ino); |
705db4a2 | 2936 | bhv_vnode_t *vp = VFS_I(ip); |
1da177e4 LT |
2937 | |
2938 | if (vp && VN_BAD(vp)) | |
2939 | goto reclaim; | |
2940 | ||
2941 | /* The hash lock here protects a thread in xfs_iget_core from | |
2942 | * racing with us on linking the inode back with a vnode. | |
2943 | * Once we have the XFS_IRECLAIM flag set it will not touch | |
2944 | * us. | |
2945 | */ | |
da353b0d | 2946 | write_lock(&pag->pag_ici_lock); |
f273ab84 | 2947 | spin_lock(&ip->i_flags_lock); |
7a18c386 DC |
2948 | if (__xfs_iflags_test(ip, XFS_IRECLAIM) || |
2949 | (!__xfs_iflags_test(ip, XFS_IRECLAIMABLE) && vp == NULL)) { | |
f273ab84 | 2950 | spin_unlock(&ip->i_flags_lock); |
da353b0d | 2951 | write_unlock(&pag->pag_ici_lock); |
1da177e4 LT |
2952 | if (locked) { |
2953 | xfs_ifunlock(ip); | |
2954 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
2955 | } | |
014c2544 | 2956 | return 1; |
1da177e4 | 2957 | } |
7a18c386 | 2958 | __xfs_iflags_set(ip, XFS_IRECLAIM); |
f273ab84 | 2959 | spin_unlock(&ip->i_flags_lock); |
da353b0d DC |
2960 | write_unlock(&pag->pag_ici_lock); |
2961 | xfs_put_perag(ip->i_mount, pag); | |
1da177e4 LT |
2962 | |
2963 | /* | |
2964 | * If the inode is still dirty, then flush it out. If the inode | |
2965 | * is not in the AIL, then it will be OK to flush it delwri as | |
2966 | * long as xfs_iflush() does not keep any references to the inode. | |
2967 | * We leave that decision up to xfs_iflush() since it has the | |
2968 | * knowledge of whether it's OK to simply do a delwri flush of | |
2969 | * the inode or whether we need to wait until the inode is | |
2970 | * pulled from the AIL. | |
2971 | * We get the flush lock regardless, though, just to make sure | |
2972 | * we don't free it while it is being flushed. | |
2973 | */ | |
461aa8a2 LM |
2974 | if (!locked) { |
2975 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2976 | xfs_iflock(ip); | |
2977 | } | |
1da177e4 | 2978 | |
7f871d5d LM |
2979 | /* |
2980 | * In the case of a forced shutdown we rely on xfs_iflush() to | |
2981 | * wait for the inode to be unpinned before returning an error. | |
2982 | */ | |
2983 | if (xfs_iflush(ip, sync_mode) == 0) { | |
2984 | /* synchronize with xfs_iflush_done */ | |
2985 | xfs_iflock(ip); | |
2986 | xfs_ifunlock(ip); | |
1da177e4 LT |
2987 | } |
2988 | ||
461aa8a2 LM |
2989 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2990 | ||
1da177e4 LT |
2991 | reclaim: |
2992 | xfs_ireclaim(ip); | |
2993 | return 0; | |
2994 | } | |
2995 | ||
2996 | int | |
2997 | xfs_finish_reclaim_all(xfs_mount_t *mp, int noblock) | |
2998 | { | |
2999 | int purged; | |
3000 | xfs_inode_t *ip, *n; | |
3001 | int done = 0; | |
3002 | ||
3003 | while (!done) { | |
3004 | purged = 0; | |
3005 | XFS_MOUNT_ILOCK(mp); | |
3006 | list_for_each_entry_safe(ip, n, &mp->m_del_inodes, i_reclaim) { | |
3007 | if (noblock) { | |
3008 | if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) | |
3009 | continue; | |
3010 | if (xfs_ipincount(ip) || | |
3011 | !xfs_iflock_nowait(ip)) { | |
3012 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3013 | continue; | |
3014 | } | |
3015 | } | |
3016 | XFS_MOUNT_IUNLOCK(mp); | |
6b2cf618 FB |
3017 | if (xfs_finish_reclaim(ip, noblock, |
3018 | XFS_IFLUSH_DELWRI_ELSE_ASYNC)) | |
3019 | delay(1); | |
1da177e4 LT |
3020 | purged = 1; |
3021 | break; | |
3022 | } | |
3023 | ||
3024 | done = !purged; | |
3025 | } | |
3026 | ||
3027 | XFS_MOUNT_IUNLOCK(mp); | |
3028 | return 0; | |
3029 | } | |
3030 | ||
3031 | /* | |
3032 | * xfs_alloc_file_space() | |
3033 | * This routine allocates disk space for the given file. | |
3034 | * | |
3035 | * If alloc_type == 0, this request is for an ALLOCSP type | |
3036 | * request which will change the file size. In this case, no | |
3037 | * DMAPI event will be generated by the call. A TRUNCATE event | |
3038 | * will be generated later by xfs_setattr. | |
3039 | * | |
3040 | * If alloc_type != 0, this request is for a RESVSP type | |
3041 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the | |
3042 | * lower block boundary byte address is less than the file's | |
3043 | * length. | |
3044 | * | |
3045 | * RETURNS: | |
3046 | * 0 on success | |
3047 | * errno on error | |
3048 | * | |
3049 | */ | |
ba0f32d4 | 3050 | STATIC int |
1da177e4 LT |
3051 | xfs_alloc_file_space( |
3052 | xfs_inode_t *ip, | |
3053 | xfs_off_t offset, | |
3054 | xfs_off_t len, | |
3055 | int alloc_type, | |
3056 | int attr_flags) | |
3057 | { | |
dd9f438e NS |
3058 | xfs_mount_t *mp = ip->i_mount; |
3059 | xfs_off_t count; | |
1da177e4 LT |
3060 | xfs_filblks_t allocated_fsb; |
3061 | xfs_filblks_t allocatesize_fsb; | |
dd9f438e NS |
3062 | xfs_extlen_t extsz, temp; |
3063 | xfs_fileoff_t startoffset_fsb; | |
1da177e4 | 3064 | xfs_fsblock_t firstfsb; |
dd9f438e NS |
3065 | int nimaps; |
3066 | int bmapi_flag; | |
3067 | int quota_flag; | |
1da177e4 | 3068 | int rt; |
1da177e4 | 3069 | xfs_trans_t *tp; |
dd9f438e NS |
3070 | xfs_bmbt_irec_t imaps[1], *imapp; |
3071 | xfs_bmap_free_t free_list; | |
3072 | uint qblocks, resblks, resrtextents; | |
3073 | int committed; | |
3074 | int error; | |
1da177e4 | 3075 | |
cf441eeb | 3076 | xfs_itrace_entry(ip); |
1da177e4 LT |
3077 | |
3078 | if (XFS_FORCED_SHUTDOWN(mp)) | |
3079 | return XFS_ERROR(EIO); | |
3080 | ||
1da177e4 LT |
3081 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
3082 | return error; | |
3083 | ||
3084 | if (len <= 0) | |
3085 | return XFS_ERROR(EINVAL); | |
3086 | ||
957d0ebe DC |
3087 | rt = XFS_IS_REALTIME_INODE(ip); |
3088 | extsz = xfs_get_extsz_hint(ip); | |
3089 | ||
1da177e4 | 3090 | count = len; |
1da177e4 | 3091 | imapp = &imaps[0]; |
dd9f438e NS |
3092 | nimaps = 1; |
3093 | bmapi_flag = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0); | |
1da177e4 LT |
3094 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
3095 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); | |
3096 | ||
3097 | /* Generate a DMAPI event if needed. */ | |
ba87ea69 | 3098 | if (alloc_type != 0 && offset < ip->i_size && |
0f285c8a | 3099 | (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 3100 | DM_EVENT_ENABLED(ip, DM_EVENT_WRITE)) { |
1da177e4 LT |
3101 | xfs_off_t end_dmi_offset; |
3102 | ||
3103 | end_dmi_offset = offset+len; | |
ba87ea69 LM |
3104 | if (end_dmi_offset > ip->i_size) |
3105 | end_dmi_offset = ip->i_size; | |
bc4ac74a CH |
3106 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, ip, offset, |
3107 | end_dmi_offset - offset, 0, NULL); | |
1da177e4 | 3108 | if (error) |
014c2544 | 3109 | return error; |
1da177e4 LT |
3110 | } |
3111 | ||
3112 | /* | |
dd9f438e | 3113 | * Allocate file space until done or until there is an error |
1da177e4 LT |
3114 | */ |
3115 | retry: | |
3116 | while (allocatesize_fsb && !error) { | |
dd9f438e NS |
3117 | xfs_fileoff_t s, e; |
3118 | ||
1da177e4 | 3119 | /* |
3ddb8fa9 | 3120 | * Determine space reservations for data/realtime. |
1da177e4 | 3121 | */ |
dd9f438e | 3122 | if (unlikely(extsz)) { |
1da177e4 | 3123 | s = startoffset_fsb; |
dd9f438e NS |
3124 | do_div(s, extsz); |
3125 | s *= extsz; | |
3126 | e = startoffset_fsb + allocatesize_fsb; | |
3127 | if ((temp = do_mod(startoffset_fsb, extsz))) | |
3128 | e += temp; | |
3129 | if ((temp = do_mod(e, extsz))) | |
3130 | e += extsz - temp; | |
3131 | } else { | |
3132 | s = 0; | |
3133 | e = allocatesize_fsb; | |
3134 | } | |
3135 | ||
3136 | if (unlikely(rt)) { | |
3137 | resrtextents = qblocks = (uint)(e - s); | |
3138 | resrtextents /= mp->m_sb.sb_rextsize; | |
3139 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
3140 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
1da177e4 | 3141 | } else { |
dd9f438e NS |
3142 | resrtextents = 0; |
3143 | resblks = qblocks = \ | |
3144 | XFS_DIOSTRAT_SPACE_RES(mp, (uint)(e - s)); | |
3145 | quota_flag = XFS_QMOPT_RES_REGBLKS; | |
1da177e4 LT |
3146 | } |
3147 | ||
3148 | /* | |
dd9f438e | 3149 | * Allocate and setup the transaction. |
1da177e4 LT |
3150 | */ |
3151 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
dd9f438e NS |
3152 | error = xfs_trans_reserve(tp, resblks, |
3153 | XFS_WRITE_LOG_RES(mp), resrtextents, | |
1da177e4 LT |
3154 | XFS_TRANS_PERM_LOG_RES, |
3155 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 3156 | /* |
dd9f438e | 3157 | * Check for running out of space |
1da177e4 LT |
3158 | */ |
3159 | if (error) { | |
3160 | /* | |
3161 | * Free the transaction structure. | |
3162 | */ | |
3163 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
3164 | xfs_trans_cancel(tp, 0); | |
3165 | break; | |
3166 | } | |
3167 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
dd9f438e NS |
3168 | error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, |
3169 | qblocks, 0, quota_flag); | |
1da177e4 LT |
3170 | if (error) |
3171 | goto error1; | |
3172 | ||
3173 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
3174 | xfs_trans_ihold(tp, ip); | |
3175 | ||
3176 | /* | |
dd9f438e | 3177 | * Issue the xfs_bmapi() call to allocate the blocks |
1da177e4 LT |
3178 | */ |
3179 | XFS_BMAP_INIT(&free_list, &firstfsb); | |
541d7d3c | 3180 | error = xfs_bmapi(tp, ip, startoffset_fsb, |
dd9f438e NS |
3181 | allocatesize_fsb, bmapi_flag, |
3182 | &firstfsb, 0, imapp, &nimaps, | |
3e57ecf6 | 3183 | &free_list, NULL); |
1da177e4 LT |
3184 | if (error) { |
3185 | goto error0; | |
3186 | } | |
3187 | ||
3188 | /* | |
dd9f438e | 3189 | * Complete the transaction |
1da177e4 | 3190 | */ |
f7c99b6f | 3191 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
3192 | if (error) { |
3193 | goto error0; | |
3194 | } | |
3195 | ||
1c72bf90 | 3196 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
3197 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
3198 | if (error) { | |
3199 | break; | |
3200 | } | |
3201 | ||
3202 | allocated_fsb = imapp->br_blockcount; | |
3203 | ||
dd9f438e | 3204 | if (nimaps == 0) { |
1da177e4 LT |
3205 | error = XFS_ERROR(ENOSPC); |
3206 | break; | |
3207 | } | |
3208 | ||
3209 | startoffset_fsb += allocated_fsb; | |
3210 | allocatesize_fsb -= allocated_fsb; | |
3211 | } | |
3212 | dmapi_enospc_check: | |
0f285c8a | 3213 | if (error == ENOSPC && (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 3214 | DM_EVENT_ENABLED(ip, DM_EVENT_NOSPACE)) { |
1da177e4 | 3215 | error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE, |
bc4ac74a CH |
3216 | ip, DM_RIGHT_NULL, |
3217 | ip, DM_RIGHT_NULL, | |
1da177e4 LT |
3218 | NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */ |
3219 | if (error == 0) | |
3220 | goto retry; /* Maybe DMAPI app. has made space */ | |
3221 | /* else fall through with error from XFS_SEND_DATA */ | |
3222 | } | |
3223 | ||
3224 | return error; | |
3225 | ||
dd9f438e | 3226 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 3227 | xfs_bmap_cancel(&free_list); |
dd9f438e NS |
3228 | XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, qblocks, 0, quota_flag); |
3229 | ||
3230 | error1: /* Just cancel transaction */ | |
1da177e4 LT |
3231 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
3232 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3233 | goto dmapi_enospc_check; | |
3234 | } | |
3235 | ||
3236 | /* | |
3237 | * Zero file bytes between startoff and endoff inclusive. | |
3238 | * The iolock is held exclusive and no blocks are buffered. | |
3239 | */ | |
3240 | STATIC int | |
3241 | xfs_zero_remaining_bytes( | |
3242 | xfs_inode_t *ip, | |
3243 | xfs_off_t startoff, | |
3244 | xfs_off_t endoff) | |
3245 | { | |
3246 | xfs_bmbt_irec_t imap; | |
3247 | xfs_fileoff_t offset_fsb; | |
3248 | xfs_off_t lastoffset; | |
3249 | xfs_off_t offset; | |
3250 | xfs_buf_t *bp; | |
3251 | xfs_mount_t *mp = ip->i_mount; | |
3252 | int nimap; | |
3253 | int error = 0; | |
3254 | ||
3255 | bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize, | |
71ddabb9 | 3256 | XFS_IS_REALTIME_INODE(ip) ? |
1da177e4 LT |
3257 | mp->m_rtdev_targp : mp->m_ddev_targp); |
3258 | ||
3259 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { | |
3260 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
3261 | nimap = 1; | |
541d7d3c | 3262 | error = xfs_bmapi(NULL, ip, offset_fsb, 1, 0, |
3e57ecf6 | 3263 | NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
3264 | if (error || nimap < 1) |
3265 | break; | |
3266 | ASSERT(imap.br_blockcount >= 1); | |
3267 | ASSERT(imap.br_startoff == offset_fsb); | |
3268 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; | |
3269 | if (lastoffset > endoff) | |
3270 | lastoffset = endoff; | |
3271 | if (imap.br_startblock == HOLESTARTBLOCK) | |
3272 | continue; | |
3273 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
3274 | if (imap.br_state == XFS_EXT_UNWRITTEN) | |
3275 | continue; | |
3276 | XFS_BUF_UNDONE(bp); | |
3277 | XFS_BUF_UNWRITE(bp); | |
3278 | XFS_BUF_READ(bp); | |
3279 | XFS_BUF_SET_ADDR(bp, XFS_FSB_TO_DB(ip, imap.br_startblock)); | |
3280 | xfsbdstrat(mp, bp); | |
d64e31a2 DC |
3281 | error = xfs_iowait(bp); |
3282 | if (error) { | |
1da177e4 LT |
3283 | xfs_ioerror_alert("xfs_zero_remaining_bytes(read)", |
3284 | mp, bp, XFS_BUF_ADDR(bp)); | |
3285 | break; | |
3286 | } | |
3287 | memset(XFS_BUF_PTR(bp) + | |
3288 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), | |
3289 | 0, lastoffset - offset + 1); | |
3290 | XFS_BUF_UNDONE(bp); | |
3291 | XFS_BUF_UNREAD(bp); | |
3292 | XFS_BUF_WRITE(bp); | |
3293 | xfsbdstrat(mp, bp); | |
d64e31a2 DC |
3294 | error = xfs_iowait(bp); |
3295 | if (error) { | |
1da177e4 LT |
3296 | xfs_ioerror_alert("xfs_zero_remaining_bytes(write)", |
3297 | mp, bp, XFS_BUF_ADDR(bp)); | |
3298 | break; | |
3299 | } | |
3300 | } | |
3301 | xfs_buf_free(bp); | |
3302 | return error; | |
3303 | } | |
3304 | ||
3305 | /* | |
3306 | * xfs_free_file_space() | |
3307 | * This routine frees disk space for the given file. | |
3308 | * | |
3309 | * This routine is only called by xfs_change_file_space | |
3310 | * for an UNRESVSP type call. | |
3311 | * | |
3312 | * RETURNS: | |
3313 | * 0 on success | |
3314 | * errno on error | |
3315 | * | |
3316 | */ | |
3317 | STATIC int | |
3318 | xfs_free_file_space( | |
3319 | xfs_inode_t *ip, | |
3320 | xfs_off_t offset, | |
3321 | xfs_off_t len, | |
3322 | int attr_flags) | |
3323 | { | |
67fcaa73 | 3324 | bhv_vnode_t *vp; |
1da177e4 LT |
3325 | int committed; |
3326 | int done; | |
3327 | xfs_off_t end_dmi_offset; | |
3328 | xfs_fileoff_t endoffset_fsb; | |
3329 | int error; | |
3330 | xfs_fsblock_t firstfsb; | |
3331 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
3332 | xfs_bmbt_irec_t imap; |
3333 | xfs_off_t ioffset; | |
3334 | xfs_extlen_t mod=0; | |
3335 | xfs_mount_t *mp; | |
3336 | int nimap; | |
3337 | uint resblks; | |
673cdf5c | 3338 | uint rounding; |
1da177e4 LT |
3339 | int rt; |
3340 | xfs_fileoff_t startoffset_fsb; | |
3341 | xfs_trans_t *tp; | |
5fcbab35 | 3342 | int need_iolock = 1; |
1da177e4 | 3343 | |
e4f75291 | 3344 | vp = VFS_I(ip); |
1da177e4 LT |
3345 | mp = ip->i_mount; |
3346 | ||
cf441eeb | 3347 | xfs_itrace_entry(ip); |
bd5a876a | 3348 | |
1da177e4 LT |
3349 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
3350 | return error; | |
3351 | ||
3352 | error = 0; | |
3353 | if (len <= 0) /* if nothing being freed */ | |
3354 | return error; | |
71ddabb9 | 3355 | rt = XFS_IS_REALTIME_INODE(ip); |
1da177e4 LT |
3356 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
3357 | end_dmi_offset = offset + len; | |
3358 | endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset); | |
3359 | ||
0f285c8a | 3360 | if (offset < ip->i_size && (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 3361 | DM_EVENT_ENABLED(ip, DM_EVENT_WRITE)) { |
ba87ea69 LM |
3362 | if (end_dmi_offset > ip->i_size) |
3363 | end_dmi_offset = ip->i_size; | |
bc4ac74a | 3364 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, ip, |
1da177e4 LT |
3365 | offset, end_dmi_offset - offset, |
3366 | AT_DELAY_FLAG(attr_flags), NULL); | |
3367 | if (error) | |
014c2544 | 3368 | return error; |
1da177e4 LT |
3369 | } |
3370 | ||
0f285c8a | 3371 | if (attr_flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 3372 | need_iolock = 0; |
9fa8046f | 3373 | if (need_iolock) { |
1da177e4 | 3374 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
b677c210 | 3375 | vn_iowait(ip); /* wait for the completion of any pending DIOs */ |
9fa8046f | 3376 | } |
5fcbab35 | 3377 | |
e6a4b37f | 3378 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
1da177e4 | 3379 | ioffset = offset & ~(rounding - 1); |
bd5a876a CH |
3380 | |
3381 | if (VN_CACHED(vp) != 0) { | |
e6a4b37f TS |
3382 | xfs_inval_cached_trace(ip, ioffset, -1, ioffset, -1); |
3383 | error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); | |
d3cf2094 LM |
3384 | if (error) |
3385 | goto out_unlock_iolock; | |
bd5a876a CH |
3386 | } |
3387 | ||
1da177e4 LT |
3388 | /* |
3389 | * Need to zero the stuff we're not freeing, on disk. | |
3390 | * If its a realtime file & can't use unwritten extents then we | |
3391 | * actually need to zero the extent edges. Otherwise xfs_bunmapi | |
3392 | * will take care of it for us. | |
3393 | */ | |
62118709 | 3394 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 | 3395 | nimap = 1; |
541d7d3c | 3396 | error = xfs_bmapi(NULL, ip, startoffset_fsb, |
3e57ecf6 | 3397 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
3398 | if (error) |
3399 | goto out_unlock_iolock; | |
3400 | ASSERT(nimap == 0 || nimap == 1); | |
3401 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
3402 | xfs_daddr_t block; | |
3403 | ||
3404 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
3405 | block = imap.br_startblock; | |
3406 | mod = do_div(block, mp->m_sb.sb_rextsize); | |
3407 | if (mod) | |
3408 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; | |
3409 | } | |
3410 | nimap = 1; | |
541d7d3c | 3411 | error = xfs_bmapi(NULL, ip, endoffset_fsb - 1, |
3e57ecf6 | 3412 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
3413 | if (error) |
3414 | goto out_unlock_iolock; | |
3415 | ASSERT(nimap == 0 || nimap == 1); | |
3416 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
3417 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
3418 | mod++; | |
3419 | if (mod && (mod != mp->m_sb.sb_rextsize)) | |
3420 | endoffset_fsb -= mod; | |
3421 | } | |
3422 | } | |
3423 | if ((done = (endoffset_fsb <= startoffset_fsb))) | |
3424 | /* | |
3425 | * One contiguous piece to clear | |
3426 | */ | |
3427 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); | |
3428 | else { | |
3429 | /* | |
3430 | * Some full blocks, possibly two pieces to clear | |
3431 | */ | |
3432 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) | |
3433 | error = xfs_zero_remaining_bytes(ip, offset, | |
3434 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); | |
3435 | if (!error && | |
3436 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) | |
3437 | error = xfs_zero_remaining_bytes(ip, | |
3438 | XFS_FSB_TO_B(mp, endoffset_fsb), | |
3439 | offset + len - 1); | |
3440 | } | |
3441 | ||
3442 | /* | |
3443 | * free file space until done or until there is an error | |
3444 | */ | |
3445 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
3446 | while (!error && !done) { | |
3447 | ||
3448 | /* | |
91ebecc7 DC |
3449 | * allocate and setup the transaction. Allow this |
3450 | * transaction to dip into the reserve blocks to ensure | |
3451 | * the freeing of the space succeeds at ENOSPC. | |
1da177e4 LT |
3452 | */ |
3453 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
91ebecc7 | 3454 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
3455 | error = xfs_trans_reserve(tp, |
3456 | resblks, | |
3457 | XFS_WRITE_LOG_RES(mp), | |
3458 | 0, | |
3459 | XFS_TRANS_PERM_LOG_RES, | |
3460 | XFS_WRITE_LOG_COUNT); | |
3461 | ||
3462 | /* | |
3463 | * check for running out of space | |
3464 | */ | |
3465 | if (error) { | |
3466 | /* | |
3467 | * Free the transaction structure. | |
3468 | */ | |
3469 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
3470 | xfs_trans_cancel(tp, 0); | |
3471 | break; | |
3472 | } | |
3473 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3474 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, | |
dd9f438e NS |
3475 | ip->i_udquot, ip->i_gdquot, resblks, 0, |
3476 | XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
3477 | if (error) |
3478 | goto error1; | |
3479 | ||
3480 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
3481 | xfs_trans_ihold(tp, ip); | |
3482 | ||
3483 | /* | |
3484 | * issue the bunmapi() call to free the blocks | |
3485 | */ | |
3486 | XFS_BMAP_INIT(&free_list, &firstfsb); | |
541d7d3c | 3487 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
1da177e4 | 3488 | endoffset_fsb - startoffset_fsb, |
3e57ecf6 | 3489 | 0, 2, &firstfsb, &free_list, NULL, &done); |
1da177e4 LT |
3490 | if (error) { |
3491 | goto error0; | |
3492 | } | |
3493 | ||
3494 | /* | |
3495 | * complete the transaction | |
3496 | */ | |
f7c99b6f | 3497 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
3498 | if (error) { |
3499 | goto error0; | |
3500 | } | |
3501 | ||
1c72bf90 | 3502 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
3503 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
3504 | } | |
3505 | ||
3506 | out_unlock_iolock: | |
3507 | if (need_iolock) | |
3508 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
3509 | return error; | |
3510 | ||
3511 | error0: | |
3512 | xfs_bmap_cancel(&free_list); | |
3513 | error1: | |
3514 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
3515 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : | |
3516 | XFS_ILOCK_EXCL); | |
3517 | return error; | |
3518 | } | |
3519 | ||
3520 | /* | |
3521 | * xfs_change_file_space() | |
3522 | * This routine allocates or frees disk space for the given file. | |
3523 | * The user specified parameters are checked for alignment and size | |
3524 | * limitations. | |
3525 | * | |
3526 | * RETURNS: | |
3527 | * 0 on success | |
3528 | * errno on error | |
3529 | * | |
3530 | */ | |
3531 | int | |
3532 | xfs_change_file_space( | |
993386c1 | 3533 | xfs_inode_t *ip, |
1da177e4 LT |
3534 | int cmd, |
3535 | xfs_flock64_t *bf, | |
3536 | xfs_off_t offset, | |
3537 | cred_t *credp, | |
3538 | int attr_flags) | |
3539 | { | |
993386c1 | 3540 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
3541 | int clrprealloc; |
3542 | int error; | |
3543 | xfs_fsize_t fsize; | |
1da177e4 LT |
3544 | int setprealloc; |
3545 | xfs_off_t startoffset; | |
3546 | xfs_off_t llen; | |
3547 | xfs_trans_t *tp; | |
0f285c8a | 3548 | struct iattr iattr; |
1da177e4 | 3549 | |
cf441eeb | 3550 | xfs_itrace_entry(ip); |
1da177e4 | 3551 | |
993386c1 | 3552 | if (!S_ISREG(ip->i_d.di_mode)) |
1da177e4 LT |
3553 | return XFS_ERROR(EINVAL); |
3554 | ||
1da177e4 LT |
3555 | switch (bf->l_whence) { |
3556 | case 0: /*SEEK_SET*/ | |
3557 | break; | |
3558 | case 1: /*SEEK_CUR*/ | |
3559 | bf->l_start += offset; | |
3560 | break; | |
3561 | case 2: /*SEEK_END*/ | |
ba87ea69 | 3562 | bf->l_start += ip->i_size; |
1da177e4 LT |
3563 | break; |
3564 | default: | |
3565 | return XFS_ERROR(EINVAL); | |
3566 | } | |
3567 | ||
3568 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; | |
3569 | ||
3570 | if ( (bf->l_start < 0) | |
3571 | || (bf->l_start > XFS_MAXIOFFSET(mp)) | |
3572 | || (bf->l_start + llen < 0) | |
3573 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) | |
3574 | return XFS_ERROR(EINVAL); | |
3575 | ||
3576 | bf->l_whence = 0; | |
3577 | ||
3578 | startoffset = bf->l_start; | |
ba87ea69 | 3579 | fsize = ip->i_size; |
1da177e4 LT |
3580 | |
3581 | /* | |
3582 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve | |
3583 | * file space. | |
3584 | * These calls do NOT zero the data space allocated to the file, | |
3585 | * nor do they change the file size. | |
3586 | * | |
3587 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file | |
3588 | * space. | |
3589 | * These calls cause the new file data to be zeroed and the file | |
3590 | * size to be changed. | |
3591 | */ | |
3592 | setprealloc = clrprealloc = 0; | |
3593 | ||
3594 | switch (cmd) { | |
3595 | case XFS_IOC_RESVSP: | |
3596 | case XFS_IOC_RESVSP64: | |
3597 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, | |
3598 | 1, attr_flags); | |
3599 | if (error) | |
3600 | return error; | |
3601 | setprealloc = 1; | |
3602 | break; | |
3603 | ||
3604 | case XFS_IOC_UNRESVSP: | |
3605 | case XFS_IOC_UNRESVSP64: | |
3606 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, | |
3607 | attr_flags))) | |
3608 | return error; | |
3609 | break; | |
3610 | ||
3611 | case XFS_IOC_ALLOCSP: | |
3612 | case XFS_IOC_ALLOCSP64: | |
3613 | case XFS_IOC_FREESP: | |
3614 | case XFS_IOC_FREESP64: | |
3615 | if (startoffset > fsize) { | |
3616 | error = xfs_alloc_file_space(ip, fsize, | |
3617 | startoffset - fsize, 0, attr_flags); | |
3618 | if (error) | |
3619 | break; | |
3620 | } | |
3621 | ||
0f285c8a CH |
3622 | iattr.ia_valid = ATTR_SIZE; |
3623 | iattr.ia_size = startoffset; | |
1da177e4 | 3624 | |
0f285c8a | 3625 | error = xfs_setattr(ip, &iattr, attr_flags, credp); |
1da177e4 LT |
3626 | |
3627 | if (error) | |
3628 | return error; | |
3629 | ||
3630 | clrprealloc = 1; | |
3631 | break; | |
3632 | ||
3633 | default: | |
3634 | ASSERT(0); | |
3635 | return XFS_ERROR(EINVAL); | |
3636 | } | |
3637 | ||
3638 | /* | |
3639 | * update the inode timestamp, mode, and prealloc flag bits | |
3640 | */ | |
3641 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
3642 | ||
3643 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), | |
3644 | 0, 0, 0))) { | |
3645 | /* ASSERT(0); */ | |
3646 | xfs_trans_cancel(tp, 0); | |
3647 | return error; | |
3648 | } | |
3649 | ||
3650 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3651 | ||
3652 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
3653 | xfs_trans_ihold(tp, ip); | |
3654 | ||
0f285c8a | 3655 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
1da177e4 LT |
3656 | ip->i_d.di_mode &= ~S_ISUID; |
3657 | ||
3658 | /* | |
3659 | * Note that we don't have to worry about mandatory | |
3660 | * file locking being disabled here because we only | |
3661 | * clear the S_ISGID bit if the Group execute bit is | |
3662 | * on, but if it was on then mandatory locking wouldn't | |
3663 | * have been enabled. | |
3664 | */ | |
3665 | if (ip->i_d.di_mode & S_IXGRP) | |
3666 | ip->i_d.di_mode &= ~S_ISGID; | |
3667 | ||
3668 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
3669 | } | |
3670 | if (setprealloc) | |
3671 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; | |
3672 | else if (clrprealloc) | |
3673 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; | |
3674 | ||
3675 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
3676 | xfs_trans_set_sync(tp); | |
3677 | ||
1c72bf90 | 3678 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
3679 | |
3680 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3681 | ||
3682 | return error; | |
3683 | } |