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" |
ef14f0c1 | 45 | #include "xfs_acl.h" |
1da177e4 LT |
46 | #include "xfs_attr.h" |
47 | #include "xfs_rw.h" | |
1da177e4 | 48 | #include "xfs_error.h" |
1da177e4 LT |
49 | #include "xfs_quota.h" |
50 | #include "xfs_utils.h" | |
a844f451 | 51 | #include "xfs_rtalloc.h" |
1da177e4 | 52 | #include "xfs_trans_space.h" |
1da177e4 | 53 | #include "xfs_log_priv.h" |
2a82b8be | 54 | #include "xfs_filestream.h" |
993386c1 | 55 | #include "xfs_vnodeops.h" |
0b1b213f | 56 | #include "xfs_trace.h" |
1da177e4 | 57 | |
1da177e4 LT |
58 | int |
59 | xfs_setattr( | |
0f285c8a CH |
60 | struct xfs_inode *ip, |
61 | struct iattr *iattr, | |
ea5a3dc8 | 62 | int flags) |
1da177e4 | 63 | { |
993386c1 | 64 | xfs_mount_t *mp = ip->i_mount; |
e4f75291 | 65 | struct inode *inode = VFS_I(ip); |
0f285c8a | 66 | int mask = iattr->ia_valid; |
1da177e4 | 67 | xfs_trans_t *tp; |
1da177e4 LT |
68 | int code; |
69 | uint lock_flags; | |
70 | uint commit_flags=0; | |
71 | uid_t uid=0, iuid=0; | |
72 | gid_t gid=0, igid=0; | |
1da177e4 | 73 | struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2; |
5fcbab35 | 74 | int need_iolock = 1; |
1da177e4 | 75 | |
cf441eeb | 76 | xfs_itrace_entry(ip); |
1da177e4 | 77 | |
bd186aa9 | 78 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
79 | return XFS_ERROR(EROFS); |
80 | ||
1da177e4 LT |
81 | if (XFS_FORCED_SHUTDOWN(mp)) |
82 | return XFS_ERROR(EIO); | |
83 | ||
c4cd747e CH |
84 | code = -inode_change_ok(inode, iattr); |
85 | if (code) | |
86 | return code; | |
87 | ||
1da177e4 LT |
88 | olddquot1 = olddquot2 = NULL; |
89 | udqp = gdqp = NULL; | |
90 | ||
91 | /* | |
92 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
93 | * before we start any other transactions. Trying to do this later | |
94 | * is messy. We don't care to take a readlock to look at the ids | |
95 | * in inode here, because we can't hold it across the trans_reserve. | |
96 | * If the IDs do change before we take the ilock, we're covered | |
97 | * because the i_*dquot fields will get updated anyway. | |
98 | */ | |
0f285c8a | 99 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { |
1da177e4 LT |
100 | uint qflags = 0; |
101 | ||
0f285c8a CH |
102 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { |
103 | uid = iattr->ia_uid; | |
1da177e4 LT |
104 | qflags |= XFS_QMOPT_UQUOTA; |
105 | } else { | |
106 | uid = ip->i_d.di_uid; | |
107 | } | |
0f285c8a CH |
108 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { |
109 | gid = iattr->ia_gid; | |
1da177e4 LT |
110 | qflags |= XFS_QMOPT_GQUOTA; |
111 | } else { | |
112 | gid = ip->i_d.di_gid; | |
113 | } | |
25fe55e8 | 114 | |
1da177e4 LT |
115 | /* |
116 | * We take a reference when we initialize udqp and gdqp, | |
117 | * so it is important that we never blindly double trip on | |
118 | * the same variable. See xfs_create() for an example. | |
119 | */ | |
120 | ASSERT(udqp == NULL); | |
121 | ASSERT(gdqp == NULL); | |
7d095257 | 122 | code = xfs_qm_vop_dqalloc(ip, uid, gid, ip->i_d.di_projid, |
25fe55e8 | 123 | qflags, &udqp, &gdqp); |
1da177e4 | 124 | if (code) |
014c2544 | 125 | return code; |
1da177e4 LT |
126 | } |
127 | ||
128 | /* | |
129 | * For the other attributes, we acquire the inode lock and | |
130 | * first do an error checking pass. | |
131 | */ | |
132 | tp = NULL; | |
133 | lock_flags = XFS_ILOCK_EXCL; | |
0f285c8a | 134 | if (flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 135 | need_iolock = 0; |
0f285c8a | 136 | if (!(mask & ATTR_SIZE)) { |
d6d59bad CH |
137 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); |
138 | commit_flags = 0; | |
139 | code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), | |
140 | 0, 0, 0); | |
141 | if (code) { | |
142 | lock_flags = 0; | |
143 | goto error_return; | |
1da177e4 LT |
144 | } |
145 | } else { | |
eb9df39d | 146 | if (DM_EVENT_ENABLED(ip, DM_EVENT_TRUNCATE) && |
0f285c8a | 147 | !(flags & XFS_ATTR_DMI)) { |
1da177e4 | 148 | int dmflags = AT_DELAY_FLAG(flags) | DM_SEM_FLAG_WR; |
bc4ac74a | 149 | code = XFS_SEND_DATA(mp, DM_EVENT_TRUNCATE, ip, |
0f285c8a | 150 | iattr->ia_size, 0, dmflags, NULL); |
1da177e4 LT |
151 | if (code) { |
152 | lock_flags = 0; | |
153 | goto error_return; | |
154 | } | |
155 | } | |
156 | if (need_iolock) | |
157 | lock_flags |= XFS_IOLOCK_EXCL; | |
158 | } | |
159 | ||
160 | xfs_ilock(ip, lock_flags); | |
161 | ||
1da177e4 LT |
162 | /* |
163 | * Change file ownership. Must be the owner or privileged. | |
1da177e4 | 164 | */ |
0f285c8a | 165 | if (mask & (ATTR_UID|ATTR_GID)) { |
1da177e4 LT |
166 | /* |
167 | * These IDs could have changed since we last looked at them. | |
168 | * But, we're assured that if the ownership did change | |
169 | * while we didn't have the inode locked, inode's dquot(s) | |
170 | * would have changed also. | |
171 | */ | |
172 | iuid = ip->i_d.di_uid; | |
1da177e4 | 173 | igid = ip->i_d.di_gid; |
0f285c8a CH |
174 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
175 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
1da177e4 | 176 | |
1da177e4 | 177 | /* |
25fe55e8 | 178 | * Do a quota reservation only if uid/gid is actually |
1da177e4 LT |
179 | * going to change. |
180 | */ | |
7d095257 CH |
181 | if (XFS_IS_QUOTA_RUNNING(mp) && |
182 | ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) || | |
183 | (XFS_IS_GQUOTA_ON(mp) && igid != gid))) { | |
1da177e4 | 184 | ASSERT(tp); |
7d095257 | 185 | code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, |
1da177e4 LT |
186 | capable(CAP_FOWNER) ? |
187 | XFS_QMOPT_FORCE_RES : 0); | |
188 | if (code) /* out of quota */ | |
189 | goto error_return; | |
190 | } | |
191 | } | |
192 | ||
193 | /* | |
194 | * Truncate file. Must have write permission and not be a directory. | |
195 | */ | |
0f285c8a | 196 | if (mask & ATTR_SIZE) { |
1da177e4 | 197 | /* Short circuit the truncate case for zero length files */ |
0f285c8a CH |
198 | if (iattr->ia_size == 0 && |
199 | ip->i_size == 0 && ip->i_d.di_nextents == 0) { | |
1da177e4 LT |
200 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
201 | lock_flags &= ~XFS_ILOCK_EXCL; | |
0f285c8a | 202 | if (mask & ATTR_CTIME) |
1da177e4 LT |
203 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
204 | code = 0; | |
205 | goto error_return; | |
206 | } | |
207 | ||
42173f68 | 208 | if (S_ISDIR(ip->i_d.di_mode)) { |
1da177e4 LT |
209 | code = XFS_ERROR(EISDIR); |
210 | goto error_return; | |
42173f68 | 211 | } else if (!S_ISREG(ip->i_d.di_mode)) { |
1da177e4 LT |
212 | code = XFS_ERROR(EINVAL); |
213 | goto error_return; | |
214 | } | |
c4cd747e | 215 | |
1da177e4 LT |
216 | /* |
217 | * Make sure that the dquots are attached to the inode. | |
218 | */ | |
7d095257 | 219 | code = xfs_qm_dqattach_locked(ip, 0); |
c4cd747e | 220 | if (code) |
1da177e4 | 221 | goto error_return; |
1da177e4 | 222 | |
c4cd747e CH |
223 | /* |
224 | * Now we can make the changes. Before we join the inode | |
225 | * to the transaction, if ATTR_SIZE is set then take care of | |
226 | * the part of the truncation that must be done without the | |
227 | * inode lock. This needs to be done before joining the inode | |
228 | * to the transaction, because the inode cannot be unlocked | |
229 | * once it is a part of the transaction. | |
230 | */ | |
0f285c8a | 231 | if (iattr->ia_size > ip->i_size) { |
61436feb CH |
232 | /* |
233 | * Do the first part of growing a file: zero any data | |
234 | * in the last block that is beyond the old EOF. We | |
235 | * need to do this before the inode is joined to the | |
236 | * transaction to modify the i_size. | |
237 | */ | |
0f285c8a | 238 | code = xfs_zero_eof(ip, iattr->ia_size, ip->i_size); |
374e2ac3 | 239 | } |
1da177e4 | 240 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
c32676ee DC |
241 | |
242 | /* | |
243 | * We are going to log the inode size change in this | |
244 | * transaction so any previous writes that are beyond the on | |
245 | * disk EOF and the new EOF that have not been written out need | |
246 | * to be written here. If we do not write the data out, we | |
247 | * expose ourselves to the null files problem. | |
248 | * | |
249 | * Only flush from the on disk size to the smaller of the in | |
250 | * memory file size or the new size as that's the range we | |
251 | * really care about here and prevents waiting for other data | |
252 | * not within the range we care about here. | |
253 | */ | |
254 | if (!code && | |
0f285c8a CH |
255 | ip->i_size != ip->i_d.di_size && |
256 | iattr->ia_size > ip->i_d.di_size) { | |
739bfb2a | 257 | code = xfs_flush_pages(ip, |
0f285c8a | 258 | ip->i_d.di_size, iattr->ia_size, |
0cadda1c | 259 | XBF_ASYNC, FI_NONE); |
c32676ee DC |
260 | } |
261 | ||
262 | /* wait for all I/O to complete */ | |
25e41b3d | 263 | xfs_ioend_wait(ip); |
c32676ee | 264 | |
1da177e4 | 265 | if (!code) |
0f285c8a | 266 | code = xfs_itruncate_data(ip, iattr->ia_size); |
1da177e4 LT |
267 | if (code) { |
268 | ASSERT(tp == NULL); | |
269 | lock_flags &= ~XFS_ILOCK_EXCL; | |
270 | ASSERT(lock_flags == XFS_IOLOCK_EXCL); | |
271 | goto error_return; | |
272 | } | |
273 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); | |
274 | if ((code = xfs_trans_reserve(tp, 0, | |
275 | XFS_ITRUNCATE_LOG_RES(mp), 0, | |
276 | XFS_TRANS_PERM_LOG_RES, | |
277 | XFS_ITRUNCATE_LOG_COUNT))) { | |
278 | xfs_trans_cancel(tp, 0); | |
279 | if (need_iolock) | |
280 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
281 | return code; | |
282 | } | |
283 | commit_flags = XFS_TRANS_RELEASE_LOG_RES; | |
284 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1da177e4 | 285 | |
1da177e4 LT |
286 | xfs_trans_ijoin(tp, ip, lock_flags); |
287 | xfs_trans_ihold(tp, ip); | |
1da177e4 | 288 | |
44d814ce DC |
289 | /* |
290 | * Only change the c/mtime if we are changing the size | |
291 | * or we are explicitly asked to change it. This handles | |
292 | * the semantic difference between truncate() and ftruncate() | |
293 | * as implemented in the VFS. | |
d6d59bad CH |
294 | * |
295 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME | |
296 | * is a special case where we need to update the times despite | |
297 | * not having these flags set. For all other operations the | |
298 | * VFS set these flags explicitly if it wants a timestamp | |
299 | * update. | |
44d814ce | 300 | */ |
d6d59bad CH |
301 | if (iattr->ia_size != ip->i_size && |
302 | (!(mask & (ATTR_CTIME | ATTR_MTIME)))) { | |
303 | iattr->ia_ctime = iattr->ia_mtime = | |
304 | current_fs_time(inode->i_sb); | |
305 | mask |= ATTR_CTIME | ATTR_MTIME; | |
306 | } | |
44d814ce | 307 | |
0f285c8a CH |
308 | if (iattr->ia_size > ip->i_size) { |
309 | ip->i_d.di_size = iattr->ia_size; | |
310 | ip->i_size = iattr->ia_size; | |
61436feb | 311 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
0f285c8a CH |
312 | } else if (iattr->ia_size <= ip->i_size || |
313 | (iattr->ia_size == 0 && ip->i_d.di_nextents)) { | |
1da177e4 LT |
314 | /* |
315 | * signal a sync transaction unless | |
316 | * we're truncating an already unlinked | |
317 | * file on a wsync filesystem | |
318 | */ | |
0f285c8a | 319 | code = xfs_itruncate_finish(&tp, ip, iattr->ia_size, |
1da177e4 LT |
320 | XFS_DATA_FORK, |
321 | ((ip->i_d.di_nlink != 0 || | |
322 | !(mp->m_flags & XFS_MOUNT_WSYNC)) | |
323 | ? 1 : 0)); | |
7d4fb40a | 324 | if (code) |
1da177e4 | 325 | goto abort_return; |
7d4fb40a NS |
326 | /* |
327 | * Truncated "down", so we're removing references | |
328 | * to old data here - if we now delay flushing for | |
329 | * a long time, we expose ourselves unduly to the | |
330 | * notorious NULL files problem. So, we mark this | |
331 | * vnode and flush it when the file is closed, and | |
332 | * do not wait the usual (long) time for writeout. | |
333 | */ | |
b3aea4ed | 334 | xfs_iflags_set(ip, XFS_ITRUNCATED); |
1da177e4 | 335 | } |
c4cd747e CH |
336 | } else if (tp) { |
337 | xfs_trans_ijoin(tp, ip, lock_flags); | |
338 | xfs_trans_ihold(tp, ip); | |
1da177e4 LT |
339 | } |
340 | ||
341 | /* | |
342 | * Change file ownership. Must be the owner or privileged. | |
1da177e4 | 343 | */ |
0f285c8a | 344 | if (mask & (ATTR_UID|ATTR_GID)) { |
1da177e4 LT |
345 | /* |
346 | * CAP_FSETID overrides the following restrictions: | |
347 | * | |
348 | * The set-user-ID and set-group-ID bits of a file will be | |
349 | * cleared upon successful return from chown() | |
350 | */ | |
351 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && | |
352 | !capable(CAP_FSETID)) { | |
353 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); | |
354 | } | |
355 | ||
356 | /* | |
357 | * Change the ownerships and register quota modifications | |
358 | * in the transaction. | |
359 | */ | |
360 | if (iuid != uid) { | |
7d095257 | 361 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
0f285c8a | 362 | ASSERT(mask & ATTR_UID); |
1da177e4 | 363 | ASSERT(udqp); |
7d095257 | 364 | olddquot1 = xfs_qm_vop_chown(tp, ip, |
1da177e4 LT |
365 | &ip->i_udquot, udqp); |
366 | } | |
367 | ip->i_d.di_uid = uid; | |
f13fae2d | 368 | inode->i_uid = uid; |
1da177e4 LT |
369 | } |
370 | if (igid != gid) { | |
7d095257 | 371 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
c8ad20ff | 372 | ASSERT(!XFS_IS_PQUOTA_ON(mp)); |
0f285c8a | 373 | ASSERT(mask & ATTR_GID); |
1da177e4 | 374 | ASSERT(gdqp); |
7d095257 | 375 | olddquot2 = xfs_qm_vop_chown(tp, ip, |
1da177e4 LT |
376 | &ip->i_gdquot, gdqp); |
377 | } | |
378 | ip->i_d.di_gid = gid; | |
f13fae2d | 379 | inode->i_gid = gid; |
1da177e4 | 380 | } |
1da177e4 LT |
381 | } |
382 | ||
c4cd747e CH |
383 | /* |
384 | * Change file access modes. | |
385 | */ | |
386 | if (mask & ATTR_MODE) { | |
387 | umode_t mode = iattr->ia_mode; | |
388 | ||
389 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
390 | mode &= ~S_ISGID; | |
391 | ||
392 | ip->i_d.di_mode &= S_IFMT; | |
393 | ip->i_d.di_mode |= mode & ~S_IFMT; | |
394 | ||
395 | inode->i_mode &= S_IFMT; | |
396 | inode->i_mode |= mode & ~S_IFMT; | |
c4cd747e | 397 | } |
1da177e4 LT |
398 | |
399 | /* | |
400 | * Change file access or modified times. | |
401 | */ | |
d6d59bad CH |
402 | if (mask & ATTR_ATIME) { |
403 | inode->i_atime = iattr->ia_atime; | |
404 | ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec; | |
405 | ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec; | |
406 | ip->i_update_core = 1; | |
1da177e4 | 407 | } |
d6d59bad | 408 | if (mask & ATTR_CTIME) { |
f13fae2d | 409 | inode->i_ctime = iattr->ia_ctime; |
0f285c8a CH |
410 | ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; |
411 | ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec; | |
1da177e4 | 412 | ip->i_update_core = 1; |
d6d59bad CH |
413 | } |
414 | if (mask & ATTR_MTIME) { | |
415 | inode->i_mtime = iattr->ia_mtime; | |
416 | ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec; | |
417 | ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec; | |
418 | ip->i_update_core = 1; | |
1da177e4 LT |
419 | } |
420 | ||
421 | /* | |
d6d59bad CH |
422 | * And finally, log the inode core if any attribute in it |
423 | * has been changed. | |
1da177e4 | 424 | */ |
d6d59bad CH |
425 | if (mask & (ATTR_UID|ATTR_GID|ATTR_MODE| |
426 | ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) | |
427 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1da177e4 LT |
428 | |
429 | XFS_STATS_INC(xs_ig_attrchg); | |
430 | ||
431 | /* | |
432 | * If this is a synchronous mount, make sure that the | |
433 | * transaction goes to disk before returning to the user. | |
434 | * This is slightly sub-optimal in that truncates require | |
c41564b5 | 435 | * two sync transactions instead of one for wsync filesystems. |
1da177e4 LT |
436 | * One for the truncate and one for the timestamps since we |
437 | * don't want to change the timestamps unless we're sure the | |
438 | * truncate worked. Truncates are less than 1% of the laddis | |
439 | * mix so this probably isn't worth the trouble to optimize. | |
440 | */ | |
441 | code = 0; | |
d6d59bad CH |
442 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
443 | xfs_trans_set_sync(tp); | |
1da177e4 | 444 | |
d6d59bad | 445 | code = xfs_trans_commit(tp, commit_flags); |
1da177e4 | 446 | |
1da177e4 LT |
447 | xfs_iunlock(ip, lock_flags); |
448 | ||
449 | /* | |
450 | * Release any dquot(s) the inode had kept before chown. | |
451 | */ | |
7d095257 CH |
452 | xfs_qm_dqrele(olddquot1); |
453 | xfs_qm_dqrele(olddquot2); | |
454 | xfs_qm_dqrele(udqp); | |
455 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 456 | |
ef14f0c1 | 457 | if (code) |
1da177e4 | 458 | return code; |
ef14f0c1 CH |
459 | |
460 | /* | |
461 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode | |
462 | * update. We could avoid this with linked transactions | |
463 | * and passing down the transaction pointer all the way | |
464 | * to attr_set. No previous user of the generic | |
465 | * Posix ACL code seems to care about this issue either. | |
466 | */ | |
467 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { | |
468 | code = -xfs_acl_chmod(inode); | |
469 | if (code) | |
470 | return XFS_ERROR(code); | |
1da177e4 LT |
471 | } |
472 | ||
eb9df39d | 473 | if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE) && |
0f285c8a | 474 | !(flags & XFS_ATTR_DMI)) { |
bc4ac74a | 475 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL, |
1da177e4 LT |
476 | NULL, DM_RIGHT_NULL, NULL, NULL, |
477 | 0, 0, AT_DELAY_FLAG(flags)); | |
478 | } | |
479 | return 0; | |
480 | ||
481 | abort_return: | |
482 | commit_flags |= XFS_TRANS_ABORT; | |
483 | /* FALLTHROUGH */ | |
484 | error_return: | |
7d095257 CH |
485 | xfs_qm_dqrele(udqp); |
486 | xfs_qm_dqrele(gdqp); | |
1da177e4 LT |
487 | if (tp) { |
488 | xfs_trans_cancel(tp, commit_flags); | |
489 | } | |
490 | if (lock_flags != 0) { | |
491 | xfs_iunlock(ip, lock_flags); | |
492 | } | |
493 | return code; | |
494 | } | |
495 | ||
7d4fb40a NS |
496 | /* |
497 | * The maximum pathlen is 1024 bytes. Since the minimum file system | |
498 | * blocksize is 512 bytes, we can get a max of 2 extents back from | |
499 | * bmapi. | |
500 | */ | |
501 | #define SYMLINK_MAPS 2 | |
502 | ||
804c83c3 CH |
503 | STATIC int |
504 | xfs_readlink_bmap( | |
505 | xfs_inode_t *ip, | |
506 | char *link) | |
507 | { | |
508 | xfs_mount_t *mp = ip->i_mount; | |
509 | int pathlen = ip->i_d.di_size; | |
510 | int nmaps = SYMLINK_MAPS; | |
511 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
512 | xfs_daddr_t d; | |
513 | int byte_cnt; | |
514 | int n; | |
515 | xfs_buf_t *bp; | |
516 | int error = 0; | |
517 | ||
518 | error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen), 0, NULL, 0, | |
519 | mval, &nmaps, NULL, NULL); | |
520 | if (error) | |
521 | goto out; | |
522 | ||
523 | for (n = 0; n < nmaps; n++) { | |
524 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
525 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
526 | ||
6ad112bf CH |
527 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), |
528 | XBF_LOCK | XBF_MAPPED | XBF_DONT_BLOCK); | |
804c83c3 CH |
529 | error = XFS_BUF_GETERROR(bp); |
530 | if (error) { | |
531 | xfs_ioerror_alert("xfs_readlink", | |
532 | ip->i_mount, bp, XFS_BUF_ADDR(bp)); | |
533 | xfs_buf_relse(bp); | |
534 | goto out; | |
535 | } | |
536 | if (pathlen < byte_cnt) | |
537 | byte_cnt = pathlen; | |
538 | pathlen -= byte_cnt; | |
539 | ||
540 | memcpy(link, XFS_BUF_PTR(bp), byte_cnt); | |
541 | xfs_buf_relse(bp); | |
542 | } | |
543 | ||
544 | link[ip->i_d.di_size] = '\0'; | |
545 | error = 0; | |
546 | ||
547 | out: | |
548 | return error; | |
549 | } | |
550 | ||
993386c1 | 551 | int |
1da177e4 | 552 | xfs_readlink( |
993386c1 | 553 | xfs_inode_t *ip, |
804c83c3 | 554 | char *link) |
1da177e4 | 555 | { |
804c83c3 | 556 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 557 | int pathlen; |
1da177e4 | 558 | int error = 0; |
1da177e4 | 559 | |
cf441eeb | 560 | xfs_itrace_entry(ip); |
1da177e4 LT |
561 | |
562 | if (XFS_FORCED_SHUTDOWN(mp)) | |
563 | return XFS_ERROR(EIO); | |
564 | ||
565 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
566 | ||
567 | ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK); | |
804c83c3 | 568 | ASSERT(ip->i_d.di_size <= MAXPATHLEN); |
1da177e4 | 569 | |
804c83c3 CH |
570 | pathlen = ip->i_d.di_size; |
571 | if (!pathlen) | |
572 | goto out; | |
1da177e4 LT |
573 | |
574 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
804c83c3 CH |
575 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); |
576 | link[pathlen] = '\0'; | |
577 | } else { | |
578 | error = xfs_readlink_bmap(ip, link); | |
1da177e4 LT |
579 | } |
580 | ||
804c83c3 | 581 | out: |
1da177e4 | 582 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
1da177e4 LT |
583 | return error; |
584 | } | |
585 | ||
1da177e4 LT |
586 | /* |
587 | * xfs_fsync | |
588 | * | |
978b7237 DC |
589 | * This is called to sync the inode and its data out to disk. We need to hold |
590 | * the I/O lock while flushing the data, and the inode lock while flushing the | |
591 | * inode. The inode lock CANNOT be held while flushing the data, so acquire | |
592 | * after we're done with that. | |
1da177e4 | 593 | */ |
993386c1 | 594 | int |
1da177e4 | 595 | xfs_fsync( |
978b7237 | 596 | xfs_inode_t *ip) |
1da177e4 | 597 | { |
1da177e4 | 598 | xfs_trans_t *tp; |
13e6d5cd | 599 | int error = 0; |
e8b217e7 | 600 | int log_flushed = 0; |
1da177e4 | 601 | |
cf441eeb | 602 | xfs_itrace_entry(ip); |
1da177e4 | 603 | |
1da177e4 LT |
604 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
605 | return XFS_ERROR(EIO); | |
606 | ||
607 | /* | |
978b7237 | 608 | * We always need to make sure that the required inode state is safe on |
13e6d5cd | 609 | * disk. The inode might be clean but we still might need to force the |
978b7237 DC |
610 | * log because of committed transactions that haven't hit the disk yet. |
611 | * Likewise, there could be unflushed non-transactional changes to the | |
612 | * inode core that have to go to disk and this requires us to issue | |
613 | * a synchronous transaction to capture these changes correctly. | |
1da177e4 | 614 | * |
978b7237 DC |
615 | * This code relies on the assumption that if the update_* fields |
616 | * of the inode are clear and the inode is unpinned then it is clean | |
617 | * and no action is required. | |
1da177e4 LT |
618 | */ |
619 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
620 | ||
13e6d5cd | 621 | if (!ip->i_update_core) { |
1da177e4 | 622 | /* |
978b7237 DC |
623 | * Timestamps/size haven't changed since last inode flush or |
624 | * inode transaction commit. That means either nothing got | |
625 | * written or a transaction committed which caught the updates. | |
626 | * If the latter happened and the transaction hasn't hit the | |
627 | * disk yet, the inode will be still be pinned. If it is, | |
628 | * force the log. | |
1da177e4 | 629 | */ |
1da177e4 | 630 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
1da177e4 | 631 | if (xfs_ipincount(ip)) { |
180040b8 CH |
632 | if (ip->i_itemp->ili_last_lsn) { |
633 | error = _xfs_log_force_lsn(ip->i_mount, | |
634 | ip->i_itemp->ili_last_lsn, | |
635 | XFS_LOG_SYNC, &log_flushed); | |
636 | } else { | |
637 | error = _xfs_log_force(ip->i_mount, | |
638 | XFS_LOG_SYNC, &log_flushed); | |
639 | } | |
1da177e4 | 640 | } |
1da177e4 LT |
641 | } else { |
642 | /* | |
978b7237 DC |
643 | * Kick off a transaction to log the inode core to get the |
644 | * updates. The sync transaction will also force the log. | |
1da177e4 LT |
645 | */ |
646 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
647 | tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS); | |
978b7237 DC |
648 | error = xfs_trans_reserve(tp, 0, |
649 | XFS_FSYNC_TS_LOG_RES(ip->i_mount), 0, 0, 0); | |
650 | if (error) { | |
1da177e4 LT |
651 | xfs_trans_cancel(tp, 0); |
652 | return error; | |
653 | } | |
654 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
655 | ||
656 | /* | |
978b7237 DC |
657 | * Note - it's possible that we might have pushed ourselves out |
658 | * of the way during trans_reserve which would flush the inode. | |
659 | * But there's no guarantee that the inode buffer has actually | |
660 | * gone out yet (it's delwri). Plus the buffer could be pinned | |
661 | * anyway if it's part of an inode in another recent | |
662 | * transaction. So we play it safe and fire off the | |
663 | * transaction anyway. | |
1da177e4 LT |
664 | */ |
665 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
666 | xfs_trans_ihold(tp, ip); | |
667 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
978b7237 | 668 | xfs_trans_set_sync(tp); |
1c72bf90 | 669 | error = _xfs_trans_commit(tp, 0, &log_flushed); |
1da177e4 LT |
670 | |
671 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
672 | } | |
f538d4da | 673 | |
e8b217e7 | 674 | if (ip->i_mount->m_flags & XFS_MOUNT_BARRIER) { |
f538d4da CH |
675 | /* |
676 | * If the log write didn't issue an ordered tag we need | |
677 | * to flush the disk cache for the data device now. | |
678 | */ | |
679 | if (!log_flushed) | |
680 | xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp); | |
681 | ||
682 | /* | |
683 | * If this inode is on the RT dev we need to flush that | |
c41564b5 | 684 | * cache as well. |
f538d4da | 685 | */ |
71ddabb9 | 686 | if (XFS_IS_REALTIME_INODE(ip)) |
f538d4da CH |
687 | xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp); |
688 | } | |
689 | ||
1da177e4 LT |
690 | return error; |
691 | } | |
692 | ||
c56c9631 CH |
693 | /* |
694 | * Flags for xfs_free_eofblocks | |
695 | */ | |
696 | #define XFS_FREE_EOF_TRYLOCK (1<<0) | |
697 | ||
1da177e4 | 698 | /* |
92dfe8d2 DC |
699 | * This is called by xfs_inactive to free any blocks beyond eof |
700 | * when the link count isn't zero and by xfs_dm_punch_hole() when | |
701 | * punching a hole to EOF. | |
1da177e4 | 702 | */ |
d96f8f89 | 703 | STATIC int |
92dfe8d2 | 704 | xfs_free_eofblocks( |
1da177e4 | 705 | xfs_mount_t *mp, |
92dfe8d2 DC |
706 | xfs_inode_t *ip, |
707 | int flags) | |
1da177e4 LT |
708 | { |
709 | xfs_trans_t *tp; | |
710 | int error; | |
711 | xfs_fileoff_t end_fsb; | |
712 | xfs_fileoff_t last_fsb; | |
713 | xfs_filblks_t map_len; | |
714 | int nimaps; | |
715 | xfs_bmbt_irec_t imap; | |
716 | ||
717 | /* | |
718 | * Figure out if there are any blocks beyond the end | |
719 | * of the file. If not, then there is nothing to do. | |
720 | */ | |
ba87ea69 | 721 | end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_size)); |
1da177e4 LT |
722 | last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
723 | map_len = last_fsb - end_fsb; | |
724 | if (map_len <= 0) | |
014c2544 | 725 | return 0; |
1da177e4 LT |
726 | |
727 | nimaps = 1; | |
728 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
541d7d3c | 729 | error = xfs_bmapi(NULL, ip, end_fsb, map_len, 0, |
3e57ecf6 | 730 | NULL, 0, &imap, &nimaps, NULL, NULL); |
1da177e4 LT |
731 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
732 | ||
733 | if (!error && (nimaps != 0) && | |
68bdb6ea YL |
734 | (imap.br_startblock != HOLESTARTBLOCK || |
735 | ip->i_delayed_blks)) { | |
1da177e4 LT |
736 | /* |
737 | * Attach the dquots to the inode up front. | |
738 | */ | |
7d095257 CH |
739 | error = xfs_qm_dqattach(ip, 0); |
740 | if (error) | |
014c2544 | 741 | return error; |
1da177e4 LT |
742 | |
743 | /* | |
744 | * There are blocks after the end of file. | |
745 | * Free them up now by truncating the file to | |
746 | * its current size. | |
747 | */ | |
748 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
749 | ||
750 | /* | |
751 | * Do the xfs_itruncate_start() call before | |
752 | * reserving any log space because | |
753 | * itruncate_start will call into the buffer | |
754 | * cache and we can't | |
755 | * do that within a transaction. | |
756 | */ | |
c56c9631 CH |
757 | if (flags & XFS_FREE_EOF_TRYLOCK) { |
758 | if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { | |
759 | xfs_trans_cancel(tp, 0); | |
760 | return 0; | |
761 | } | |
762 | } else { | |
92dfe8d2 | 763 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
c56c9631 | 764 | } |
d3cf2094 | 765 | error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, |
ba87ea69 | 766 | ip->i_size); |
d3cf2094 | 767 | if (error) { |
87ae3c24 | 768 | xfs_trans_cancel(tp, 0); |
c56c9631 | 769 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
d3cf2094 LM |
770 | return error; |
771 | } | |
1da177e4 LT |
772 | |
773 | error = xfs_trans_reserve(tp, 0, | |
774 | XFS_ITRUNCATE_LOG_RES(mp), | |
775 | 0, XFS_TRANS_PERM_LOG_RES, | |
776 | XFS_ITRUNCATE_LOG_COUNT); | |
777 | if (error) { | |
778 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
779 | xfs_trans_cancel(tp, 0); | |
780 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 781 | return error; |
1da177e4 LT |
782 | } |
783 | ||
784 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
785 | xfs_trans_ijoin(tp, ip, | |
786 | XFS_IOLOCK_EXCL | | |
787 | XFS_ILOCK_EXCL); | |
788 | xfs_trans_ihold(tp, ip); | |
789 | ||
790 | error = xfs_itruncate_finish(&tp, ip, | |
ba87ea69 | 791 | ip->i_size, |
1da177e4 LT |
792 | XFS_DATA_FORK, |
793 | 0); | |
794 | /* | |
795 | * If we get an error at this point we | |
796 | * simply don't bother truncating the file. | |
797 | */ | |
798 | if (error) { | |
799 | xfs_trans_cancel(tp, | |
800 | (XFS_TRANS_RELEASE_LOG_RES | | |
801 | XFS_TRANS_ABORT)); | |
802 | } else { | |
803 | error = xfs_trans_commit(tp, | |
1c72bf90 | 804 | XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 805 | } |
c56c9631 | 806 | xfs_iunlock(ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL); |
1da177e4 | 807 | } |
014c2544 | 808 | return error; |
1da177e4 LT |
809 | } |
810 | ||
811 | /* | |
812 | * Free a symlink that has blocks associated with it. | |
813 | */ | |
814 | STATIC int | |
815 | xfs_inactive_symlink_rmt( | |
816 | xfs_inode_t *ip, | |
817 | xfs_trans_t **tpp) | |
818 | { | |
819 | xfs_buf_t *bp; | |
820 | int committed; | |
821 | int done; | |
822 | int error; | |
823 | xfs_fsblock_t first_block; | |
824 | xfs_bmap_free_t free_list; | |
825 | int i; | |
826 | xfs_mount_t *mp; | |
827 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
828 | int nmaps; | |
829 | xfs_trans_t *ntp; | |
830 | int size; | |
831 | xfs_trans_t *tp; | |
832 | ||
833 | tp = *tpp; | |
834 | mp = ip->i_mount; | |
835 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); | |
836 | /* | |
837 | * We're freeing a symlink that has some | |
838 | * blocks allocated to it. Free the | |
839 | * blocks here. We know that we've got | |
840 | * either 1 or 2 extents and that we can | |
841 | * free them all in one bunmapi call. | |
842 | */ | |
843 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
844 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
845 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
846 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
847 | xfs_trans_cancel(tp, 0); | |
848 | *tpp = NULL; | |
849 | return error; | |
850 | } | |
851 | /* | |
852 | * Lock the inode, fix the size, and join it to the transaction. | |
853 | * Hold it so in the normal path, we still have it locked for | |
854 | * the second transaction. In the error paths we need it | |
855 | * held so the cancel won't rele it, see below. | |
856 | */ | |
857 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
858 | size = (int)ip->i_d.di_size; | |
859 | ip->i_d.di_size = 0; | |
860 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
861 | xfs_trans_ihold(tp, ip); | |
862 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
863 | /* | |
864 | * Find the block(s) so we can inval and unmap them. | |
865 | */ | |
866 | done = 0; | |
9d87c319 | 867 | xfs_bmap_init(&free_list, &first_block); |
e8c96f8c | 868 | nmaps = ARRAY_SIZE(mval); |
1da177e4 LT |
869 | if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size), |
870 | XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps, | |
3e57ecf6 | 871 | &free_list, NULL))) |
1da177e4 LT |
872 | goto error0; |
873 | /* | |
874 | * Invalidate the block(s). | |
875 | */ | |
876 | for (i = 0; i < nmaps; i++) { | |
877 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
878 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
879 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
880 | xfs_trans_binval(tp, bp); | |
881 | } | |
882 | /* | |
883 | * Unmap the dead block(s) to the free_list. | |
884 | */ | |
885 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, | |
3e57ecf6 | 886 | &first_block, &free_list, NULL, &done))) |
1da177e4 LT |
887 | goto error1; |
888 | ASSERT(done); | |
889 | /* | |
890 | * Commit the first transaction. This logs the EFI and the inode. | |
891 | */ | |
f7c99b6f | 892 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
1da177e4 LT |
893 | goto error1; |
894 | /* | |
895 | * The transaction must have been committed, since there were | |
896 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
897 | * The new tp has the extent freeing and EFDs. | |
898 | */ | |
899 | ASSERT(committed); | |
900 | /* | |
901 | * The first xact was committed, so add the inode to the new one. | |
902 | * Mark it dirty so it will be logged and moved forward in the log as | |
903 | * part of every commit. | |
904 | */ | |
905 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
906 | xfs_trans_ihold(tp, ip); | |
907 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
908 | /* | |
909 | * Get a new, empty transaction to return to our caller. | |
910 | */ | |
911 | ntp = xfs_trans_dup(tp); | |
912 | /* | |
c41564b5 | 913 | * Commit the transaction containing extent freeing and EFDs. |
1da177e4 LT |
914 | * If we get an error on the commit here or on the reserve below, |
915 | * we need to unlock the inode since the new transaction doesn't | |
916 | * have the inode attached. | |
917 | */ | |
1c72bf90 | 918 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
919 | tp = ntp; |
920 | if (error) { | |
921 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
922 | goto error0; | |
923 | } | |
cc09c0dc DC |
924 | /* |
925 | * transaction commit worked ok so we can drop the extra ticket | |
926 | * reference that we gained in xfs_trans_dup() | |
927 | */ | |
928 | xfs_log_ticket_put(tp->t_ticket); | |
929 | ||
1da177e4 LT |
930 | /* |
931 | * Remove the memory for extent descriptions (just bookkeeping). | |
932 | */ | |
933 | if (ip->i_df.if_bytes) | |
934 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
935 | ASSERT(ip->i_df.if_bytes == 0); | |
936 | /* | |
937 | * Put an itruncate log reservation in the new transaction | |
938 | * for our caller. | |
939 | */ | |
940 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
941 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
942 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
943 | goto error0; | |
944 | } | |
945 | /* | |
946 | * Return with the inode locked but not joined to the transaction. | |
947 | */ | |
948 | *tpp = tp; | |
949 | return 0; | |
950 | ||
951 | error1: | |
952 | xfs_bmap_cancel(&free_list); | |
953 | error0: | |
954 | /* | |
955 | * Have to come here with the inode locked and either | |
956 | * (held and in the transaction) or (not in the transaction). | |
957 | * If the inode isn't held then cancel would iput it, but | |
958 | * that's wrong since this is inactive and the vnode ref | |
959 | * count is 0 already. | |
960 | * Cancel won't do anything to the inode if held, but it still | |
961 | * needs to be locked until the cancel is done, if it was | |
962 | * joined to the transaction. | |
963 | */ | |
964 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
965 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
966 | *tpp = NULL; | |
967 | return error; | |
968 | ||
969 | } | |
970 | ||
971 | STATIC int | |
972 | xfs_inactive_symlink_local( | |
973 | xfs_inode_t *ip, | |
974 | xfs_trans_t **tpp) | |
975 | { | |
976 | int error; | |
977 | ||
978 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); | |
979 | /* | |
980 | * We're freeing a symlink which fit into | |
981 | * the inode. Just free the memory used | |
982 | * to hold the old symlink. | |
983 | */ | |
984 | error = xfs_trans_reserve(*tpp, 0, | |
985 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), | |
986 | 0, XFS_TRANS_PERM_LOG_RES, | |
987 | XFS_ITRUNCATE_LOG_COUNT); | |
988 | ||
989 | if (error) { | |
990 | xfs_trans_cancel(*tpp, 0); | |
991 | *tpp = NULL; | |
014c2544 | 992 | return error; |
1da177e4 LT |
993 | } |
994 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
995 | ||
996 | /* | |
997 | * Zero length symlinks _can_ exist. | |
998 | */ | |
999 | if (ip->i_df.if_bytes > 0) { | |
1000 | xfs_idata_realloc(ip, | |
1001 | -(ip->i_df.if_bytes), | |
1002 | XFS_DATA_FORK); | |
1003 | ASSERT(ip->i_df.if_bytes == 0); | |
1004 | } | |
014c2544 | 1005 | return 0; |
1da177e4 LT |
1006 | } |
1007 | ||
1da177e4 LT |
1008 | STATIC int |
1009 | xfs_inactive_attrs( | |
1010 | xfs_inode_t *ip, | |
1011 | xfs_trans_t **tpp) | |
1012 | { | |
1013 | xfs_trans_t *tp; | |
1014 | int error; | |
1015 | xfs_mount_t *mp; | |
1016 | ||
579aa9ca | 1017 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
1da177e4 LT |
1018 | tp = *tpp; |
1019 | mp = ip->i_mount; | |
1020 | ASSERT(ip->i_d.di_forkoff != 0); | |
e5720eec | 1021 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 1022 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
e5720eec DC |
1023 | if (error) |
1024 | goto error_unlock; | |
1da177e4 LT |
1025 | |
1026 | error = xfs_attr_inactive(ip); | |
e5720eec DC |
1027 | if (error) |
1028 | goto error_unlock; | |
1da177e4 LT |
1029 | |
1030 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1031 | error = xfs_trans_reserve(tp, 0, | |
1032 | XFS_IFREE_LOG_RES(mp), | |
1033 | 0, XFS_TRANS_PERM_LOG_RES, | |
1034 | XFS_INACTIVE_LOG_COUNT); | |
e5720eec DC |
1035 | if (error) |
1036 | goto error_cancel; | |
1da177e4 LT |
1037 | |
1038 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1039 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1040 | xfs_trans_ihold(tp, ip); | |
1041 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
1042 | ||
1043 | ASSERT(ip->i_d.di_anextents == 0); | |
1044 | ||
1045 | *tpp = tp; | |
014c2544 | 1046 | return 0; |
e5720eec DC |
1047 | |
1048 | error_cancel: | |
1049 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1050 | xfs_trans_cancel(tp, 0); | |
1051 | error_unlock: | |
1052 | *tpp = NULL; | |
1053 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1054 | return error; | |
1da177e4 LT |
1055 | } |
1056 | ||
993386c1 | 1057 | int |
1da177e4 | 1058 | xfs_release( |
993386c1 | 1059 | xfs_inode_t *ip) |
1da177e4 | 1060 | { |
993386c1 | 1061 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
1062 | int error; |
1063 | ||
42173f68 | 1064 | if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) |
1da177e4 | 1065 | return 0; |
1da177e4 LT |
1066 | |
1067 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 1068 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
1069 | return 0; |
1070 | ||
2a82b8be | 1071 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
b3aea4ed CH |
1072 | int truncated; |
1073 | ||
2a82b8be DC |
1074 | /* |
1075 | * If we are using filestreams, and we have an unlinked | |
1076 | * file that we are processing the last close on, then nothing | |
1077 | * will be able to reopen and write to this file. Purge this | |
1078 | * inode from the filestreams cache so that it doesn't delay | |
1079 | * teardown of the inode. | |
1080 | */ | |
1081 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) | |
1082 | xfs_filestream_deassociate(ip); | |
1083 | ||
fbf3ce8d CH |
1084 | /* |
1085 | * If we previously truncated this file and removed old data | |
1086 | * in the process, we want to initiate "early" writeout on | |
1087 | * the last close. This is an attempt to combat the notorious | |
1088 | * NULL files problem which is particularly noticable from a | |
1089 | * truncate down, buffered (re-)write (delalloc), followed by | |
1090 | * a crash. What we are effectively doing here is | |
1091 | * significantly reducing the time window where we'd otherwise | |
1092 | * be exposed to that problem. | |
1093 | */ | |
09262b43 | 1094 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
df80c933 | 1095 | if (truncated && VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) |
0cadda1c | 1096 | xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); |
fbf3ce8d CH |
1097 | } |
1098 | ||
1da177e4 LT |
1099 | if (ip->i_d.di_nlink != 0) { |
1100 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
df80c933 | 1101 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
68bdb6ea | 1102 | ip->i_delayed_blks > 0)) && |
1da177e4 | 1103 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && |
dd9f438e NS |
1104 | (!(ip->i_d.di_flags & |
1105 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { | |
c56c9631 CH |
1106 | |
1107 | /* | |
1108 | * If we can't get the iolock just skip truncating | |
1109 | * the blocks past EOF because we could deadlock | |
1110 | * with the mmap_sem otherwise. We'll get another | |
1111 | * chance to drop them once the last reference to | |
1112 | * the inode is dropped, so we'll never leak blocks | |
1113 | * permanently. | |
1114 | */ | |
1115 | error = xfs_free_eofblocks(mp, ip, | |
1116 | XFS_FREE_EOF_TRYLOCK); | |
92dfe8d2 | 1117 | if (error) |
014c2544 | 1118 | return error; |
1da177e4 LT |
1119 | } |
1120 | } | |
1121 | ||
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | /* | |
1126 | * xfs_inactive | |
1127 | * | |
1128 | * This is called when the vnode reference count for the vnode | |
1129 | * goes to zero. If the file has been unlinked, then it must | |
1130 | * now be truncated. Also, we clear all of the read-ahead state | |
1131 | * kept for the inode here since the file is now closed. | |
1132 | */ | |
993386c1 | 1133 | int |
1da177e4 | 1134 | xfs_inactive( |
993386c1 | 1135 | xfs_inode_t *ip) |
1da177e4 | 1136 | { |
67fcaa73 | 1137 | xfs_bmap_free_t free_list; |
1da177e4 LT |
1138 | xfs_fsblock_t first_block; |
1139 | int committed; | |
1140 | xfs_trans_t *tp; | |
1141 | xfs_mount_t *mp; | |
1142 | int error; | |
1143 | int truncate; | |
1144 | ||
cf441eeb | 1145 | xfs_itrace_entry(ip); |
1da177e4 | 1146 | |
1da177e4 LT |
1147 | /* |
1148 | * If the inode is already free, then there can be nothing | |
1149 | * to clean up here. | |
1150 | */ | |
cb4c8cc1 | 1151 | if (ip->i_d.di_mode == 0 || is_bad_inode(VFS_I(ip))) { |
1da177e4 LT |
1152 | ASSERT(ip->i_df.if_real_bytes == 0); |
1153 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
1154 | return VN_INACTIVE_CACHE; | |
1155 | } | |
1156 | ||
1157 | /* | |
1158 | * Only do a truncate if it's a regular file with | |
1159 | * some actual space in it. It's OK to look at the | |
1160 | * inode's fields without the lock because we're the | |
1161 | * only one with a reference to the inode. | |
1162 | */ | |
1163 | truncate = ((ip->i_d.di_nlink == 0) && | |
ba87ea69 LM |
1164 | ((ip->i_d.di_size != 0) || (ip->i_size != 0) || |
1165 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && | |
1da177e4 LT |
1166 | ((ip->i_d.di_mode & S_IFMT) == S_IFREG)); |
1167 | ||
1168 | mp = ip->i_mount; | |
1169 | ||
bc4ac74a CH |
1170 | if (ip->i_d.di_nlink == 0 && DM_EVENT_ENABLED(ip, DM_EVENT_DESTROY)) |
1171 | XFS_SEND_DESTROY(mp, ip, DM_RIGHT_NULL); | |
1da177e4 LT |
1172 | |
1173 | error = 0; | |
1174 | ||
1175 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 1176 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
1177 | goto out; |
1178 | ||
1179 | if (ip->i_d.di_nlink != 0) { | |
1180 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
df80c933 | 1181 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
68bdb6ea | 1182 | ip->i_delayed_blks > 0)) && |
dd9f438e NS |
1183 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
1184 | (!(ip->i_d.di_flags & | |
1185 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || | |
1186 | (ip->i_delayed_blks != 0)))) { | |
c56c9631 | 1187 | error = xfs_free_eofblocks(mp, ip, 0); |
92dfe8d2 | 1188 | if (error) |
014c2544 | 1189 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1190 | } |
1191 | goto out; | |
1192 | } | |
1193 | ||
1194 | ASSERT(ip->i_d.di_nlink == 0); | |
1195 | ||
7d095257 CH |
1196 | error = xfs_qm_dqattach(ip, 0); |
1197 | if (error) | |
014c2544 | 1198 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1199 | |
1200 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1201 | if (truncate) { | |
1202 | /* | |
1203 | * Do the xfs_itruncate_start() call before | |
1204 | * reserving any log space because itruncate_start | |
1205 | * will call into the buffer cache and we can't | |
1206 | * do that within a transaction. | |
1207 | */ | |
1208 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
1209 | ||
d3cf2094 LM |
1210 | error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0); |
1211 | if (error) { | |
87ae3c24 | 1212 | xfs_trans_cancel(tp, 0); |
d3cf2094 LM |
1213 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
1214 | return VN_INACTIVE_CACHE; | |
1215 | } | |
1da177e4 LT |
1216 | |
1217 | error = xfs_trans_reserve(tp, 0, | |
1218 | XFS_ITRUNCATE_LOG_RES(mp), | |
1219 | 0, XFS_TRANS_PERM_LOG_RES, | |
1220 | XFS_ITRUNCATE_LOG_COUNT); | |
1221 | if (error) { | |
1222 | /* Don't call itruncate_cleanup */ | |
1223 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1224 | xfs_trans_cancel(tp, 0); | |
1225 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 1226 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1227 | } |
1228 | ||
1229 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1230 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1231 | xfs_trans_ihold(tp, ip); | |
1232 | ||
1233 | /* | |
1234 | * normally, we have to run xfs_itruncate_finish sync. | |
1235 | * But if filesystem is wsync and we're in the inactive | |
1236 | * path, then we know that nlink == 0, and that the | |
1237 | * xaction that made nlink == 0 is permanently committed | |
1238 | * since xfs_remove runs as a synchronous transaction. | |
1239 | */ | |
1240 | error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK, | |
1241 | (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0)); | |
1242 | ||
1243 | if (error) { | |
1244 | xfs_trans_cancel(tp, | |
1245 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
1246 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
014c2544 | 1247 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1248 | } |
1249 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) { | |
1250 | ||
1251 | /* | |
1252 | * If we get an error while cleaning up a | |
1253 | * symlink we bail out. | |
1254 | */ | |
1255 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? | |
1256 | xfs_inactive_symlink_rmt(ip, &tp) : | |
1257 | xfs_inactive_symlink_local(ip, &tp); | |
1258 | ||
1259 | if (error) { | |
1260 | ASSERT(tp == NULL); | |
014c2544 | 1261 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1262 | } |
1263 | ||
1264 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1265 | xfs_trans_ihold(tp, ip); | |
1266 | } else { | |
1267 | error = xfs_trans_reserve(tp, 0, | |
1268 | XFS_IFREE_LOG_RES(mp), | |
1269 | 0, XFS_TRANS_PERM_LOG_RES, | |
1270 | XFS_INACTIVE_LOG_COUNT); | |
1271 | if (error) { | |
1272 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1273 | xfs_trans_cancel(tp, 0); | |
014c2544 | 1274 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1275 | } |
1276 | ||
1277 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
1278 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1279 | xfs_trans_ihold(tp, ip); | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * If there are attributes associated with the file | |
1284 | * then blow them away now. The code calls a routine | |
1285 | * that recursively deconstructs the attribute fork. | |
1286 | * We need to just commit the current transaction | |
1287 | * because we can't use it for xfs_attr_inactive(). | |
1288 | */ | |
1289 | if (ip->i_d.di_anextents > 0) { | |
1290 | error = xfs_inactive_attrs(ip, &tp); | |
1291 | /* | |
1292 | * If we got an error, the transaction is already | |
1293 | * cancelled, and the inode is unlocked. Just get out. | |
1294 | */ | |
1295 | if (error) | |
014c2544 | 1296 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1297 | } else if (ip->i_afp) { |
1298 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
1299 | } | |
1300 | ||
1301 | /* | |
1302 | * Free the inode. | |
1303 | */ | |
9d87c319 | 1304 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
1305 | error = xfs_ifree(tp, ip, &free_list); |
1306 | if (error) { | |
1307 | /* | |
1308 | * If we fail to free the inode, shut down. The cancel | |
1309 | * might do that, we need to make sure. Otherwise the | |
1310 | * inode might be lost for a long time or forever. | |
1311 | */ | |
1312 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1313 | cmn_err(CE_NOTE, | |
1314 | "xfs_inactive: xfs_ifree() returned an error = %d on %s", | |
1315 | error, mp->m_fsname); | |
7d04a335 | 1316 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
1317 | } |
1318 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
1319 | } else { | |
1320 | /* | |
1321 | * Credit the quota account(s). The inode is gone. | |
1322 | */ | |
7d095257 | 1323 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
1da177e4 LT |
1324 | |
1325 | /* | |
78e9da77 DC |
1326 | * Just ignore errors at this point. There is nothing we can |
1327 | * do except to try to keep going. Make sure it's not a silent | |
1328 | * error. | |
1da177e4 | 1329 | */ |
78e9da77 DC |
1330 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1331 | if (error) | |
1332 | xfs_fs_cmn_err(CE_NOTE, mp, "xfs_inactive: " | |
1333 | "xfs_bmap_finish() returned error %d", error); | |
1334 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
1335 | if (error) | |
1336 | xfs_fs_cmn_err(CE_NOTE, mp, "xfs_inactive: " | |
1337 | "xfs_trans_commit() returned error %d", error); | |
1da177e4 | 1338 | } |
7d095257 | 1339 | |
1da177e4 LT |
1340 | /* |
1341 | * Release the dquots held by inode, if any. | |
1342 | */ | |
7d095257 | 1343 | xfs_qm_dqdetach(ip); |
1da177e4 LT |
1344 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
1345 | ||
1346 | out: | |
1347 | return VN_INACTIVE_CACHE; | |
1348 | } | |
1349 | ||
384f3ced BN |
1350 | /* |
1351 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
1352 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
1353 | * ci_name->name will point to a the actual name (caller must free) or | |
1354 | * will be set to NULL if an exact match is found. | |
1355 | */ | |
993386c1 | 1356 | int |
1da177e4 | 1357 | xfs_lookup( |
993386c1 | 1358 | xfs_inode_t *dp, |
556b8b16 | 1359 | struct xfs_name *name, |
384f3ced BN |
1360 | xfs_inode_t **ipp, |
1361 | struct xfs_name *ci_name) | |
1da177e4 | 1362 | { |
eca450b7 | 1363 | xfs_ino_t inum; |
1da177e4 LT |
1364 | int error; |
1365 | uint lock_mode; | |
1da177e4 | 1366 | |
cf441eeb | 1367 | xfs_itrace_entry(dp); |
1da177e4 LT |
1368 | |
1369 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
1370 | return XFS_ERROR(EIO); | |
1371 | ||
1372 | lock_mode = xfs_ilock_map_shared(dp); | |
384f3ced | 1373 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
1da177e4 | 1374 | xfs_iunlock_map_shared(dp, lock_mode); |
eca450b7 CH |
1375 | |
1376 | if (error) | |
1377 | goto out; | |
1378 | ||
1379 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp, 0); | |
1380 | if (error) | |
384f3ced | 1381 | goto out_free_name; |
eca450b7 | 1382 | |
eca450b7 CH |
1383 | return 0; |
1384 | ||
384f3ced BN |
1385 | out_free_name: |
1386 | if (ci_name) | |
1387 | kmem_free(ci_name->name); | |
1388 | out: | |
eca450b7 | 1389 | *ipp = NULL; |
1da177e4 LT |
1390 | return error; |
1391 | } | |
1392 | ||
993386c1 | 1393 | int |
1da177e4 | 1394 | xfs_create( |
993386c1 | 1395 | xfs_inode_t *dp, |
556b8b16 | 1396 | struct xfs_name *name, |
3e5daf05 CH |
1397 | mode_t mode, |
1398 | xfs_dev_t rdev, | |
979ebab1 | 1399 | xfs_inode_t **ipp, |
1da177e4 LT |
1400 | cred_t *credp) |
1401 | { | |
517b5e8c CH |
1402 | int is_dir = S_ISDIR(mode); |
1403 | struct xfs_mount *mp = dp->i_mount; | |
1404 | struct xfs_inode *ip = NULL; | |
1405 | struct xfs_trans *tp = NULL; | |
556b8b16 | 1406 | int error; |
1da177e4 LT |
1407 | xfs_bmap_free_t free_list; |
1408 | xfs_fsblock_t first_block; | |
993386c1 | 1409 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1410 | uint cancel_flags; |
1411 | int committed; | |
1412 | xfs_prid_t prid; | |
517b5e8c CH |
1413 | struct xfs_dquot *udqp = NULL; |
1414 | struct xfs_dquot *gdqp = NULL; | |
1da177e4 | 1415 | uint resblks; |
517b5e8c CH |
1416 | uint log_res; |
1417 | uint log_count; | |
1da177e4 | 1418 | |
cf441eeb | 1419 | xfs_itrace_entry(dp); |
1da177e4 | 1420 | |
517b5e8c CH |
1421 | if (XFS_FORCED_SHUTDOWN(mp)) |
1422 | return XFS_ERROR(EIO); | |
1423 | ||
eb9df39d | 1424 | if (DM_EVENT_ENABLED(dp, DM_EVENT_CREATE)) { |
1da177e4 | 1425 | error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, |
bc4ac74a | 1426 | dp, DM_RIGHT_NULL, NULL, |
556b8b16 | 1427 | DM_RIGHT_NULL, name->name, NULL, |
3e5daf05 | 1428 | mode, 0, 0); |
1da177e4 LT |
1429 | |
1430 | if (error) | |
1431 | return error; | |
1da177e4 LT |
1432 | } |
1433 | ||
365ca83d NS |
1434 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
1435 | prid = dp->i_d.di_projid; | |
1da177e4 | 1436 | else |
517b5e8c | 1437 | prid = dfltprid; |
1da177e4 LT |
1438 | |
1439 | /* | |
1440 | * Make sure that we have allocated dquot(s) on disk. | |
1441 | */ | |
7d095257 | 1442 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
517b5e8c | 1443 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1da177e4 LT |
1444 | if (error) |
1445 | goto std_return; | |
1446 | ||
517b5e8c CH |
1447 | if (is_dir) { |
1448 | rdev = 0; | |
1449 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
1450 | log_res = XFS_MKDIR_LOG_RES(mp); | |
1451 | log_count = XFS_MKDIR_LOG_COUNT; | |
1452 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); | |
1453 | } else { | |
1454 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
1455 | log_res = XFS_CREATE_LOG_RES(mp); | |
1456 | log_count = XFS_CREATE_LOG_COUNT; | |
1457 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); | |
1458 | } | |
1da177e4 | 1459 | |
1da177e4 | 1460 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
517b5e8c | 1461 | |
1da177e4 LT |
1462 | /* |
1463 | * Initially assume that the file does not exist and | |
1464 | * reserve the resources for that case. If that is not | |
1465 | * the case we'll drop the one we have and get a more | |
1466 | * appropriate transaction later. | |
1467 | */ | |
517b5e8c CH |
1468 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
1469 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 | 1470 | if (error == ENOSPC) { |
153fec43 DC |
1471 | /* flush outstanding delalloc blocks and retry */ |
1472 | xfs_flush_inodes(dp); | |
4734d401 CH |
1473 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
1474 | XFS_TRANS_PERM_LOG_RES, log_count); | |
153fec43 DC |
1475 | } |
1476 | if (error == ENOSPC) { | |
1477 | /* No space at all so try a "no-allocation" reservation */ | |
1da177e4 | 1478 | resblks = 0; |
517b5e8c CH |
1479 | error = xfs_trans_reserve(tp, 0, log_res, 0, |
1480 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 LT |
1481 | } |
1482 | if (error) { | |
1483 | cancel_flags = 0; | |
517b5e8c | 1484 | goto out_trans_cancel; |
1da177e4 LT |
1485 | } |
1486 | ||
f7c66ce3 | 1487 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 1488 | unlock_dp_on_error = B_TRUE; |
1da177e4 | 1489 | |
517b5e8c CH |
1490 | /* |
1491 | * Check for directory link count overflow. | |
1492 | */ | |
1493 | if (is_dir && dp->i_d.di_nlink >= XFS_MAXLINK) { | |
1494 | error = XFS_ERROR(EMLINK); | |
1495 | goto out_trans_cancel; | |
1496 | } | |
1da177e4 | 1497 | |
517b5e8c | 1498 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
1499 | |
1500 | /* | |
1501 | * Reserve disk quota and the inode. | |
1502 | */ | |
7d095257 | 1503 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 | 1504 | if (error) |
517b5e8c | 1505 | goto out_trans_cancel; |
1da177e4 | 1506 | |
556b8b16 BN |
1507 | error = xfs_dir_canenter(tp, dp, name, resblks); |
1508 | if (error) | |
517b5e8c CH |
1509 | goto out_trans_cancel; |
1510 | ||
1511 | /* | |
1512 | * A newly created regular or special file just has one directory | |
1513 | * entry pointing to them, but a directory also the "." entry | |
1514 | * pointing to itself. | |
1515 | */ | |
1516 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, credp, | |
1517 | prid, resblks > 0, &ip, &committed); | |
1da177e4 LT |
1518 | if (error) { |
1519 | if (error == ENOSPC) | |
517b5e8c CH |
1520 | goto out_trans_cancel; |
1521 | goto out_trans_abort; | |
1da177e4 | 1522 | } |
1da177e4 LT |
1523 | |
1524 | /* | |
1525 | * At this point, we've gotten a newly allocated inode. | |
1526 | * It is locked (and joined to the transaction). | |
1527 | */ | |
579aa9ca | 1528 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
1529 | |
1530 | /* | |
993386c1 CH |
1531 | * Now we join the directory inode to the transaction. We do not do it |
1532 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
1533 | * (and release all the locks). An error from here on will result in | |
1534 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
1535 | * error path. | |
1da177e4 | 1536 | */ |
979ebab1 | 1537 | IHOLD(dp); |
1da177e4 | 1538 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 1539 | unlock_dp_on_error = B_FALSE; |
1da177e4 | 1540 | |
556b8b16 | 1541 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
f6c2d1fa NS |
1542 | &first_block, &free_list, resblks ? |
1543 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
1544 | if (error) { |
1545 | ASSERT(error != ENOSPC); | |
517b5e8c | 1546 | goto out_trans_abort; |
1da177e4 LT |
1547 | } |
1548 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1549 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1550 | ||
517b5e8c CH |
1551 | if (is_dir) { |
1552 | error = xfs_dir_init(tp, ip, dp); | |
1553 | if (error) | |
1554 | goto out_bmap_cancel; | |
1555 | ||
1556 | error = xfs_bumplink(tp, dp); | |
1557 | if (error) | |
1558 | goto out_bmap_cancel; | |
1559 | } | |
1560 | ||
1da177e4 LT |
1561 | /* |
1562 | * If this is a synchronous mount, make sure that the | |
1563 | * create transaction goes to disk before returning to | |
1564 | * the user. | |
1565 | */ | |
517b5e8c | 1566 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 1567 | xfs_trans_set_sync(tp); |
1da177e4 | 1568 | |
1da177e4 LT |
1569 | /* |
1570 | * Attach the dquot(s) to the inodes and modify them incore. | |
1571 | * These ids of the inode couldn't have changed since the new | |
1572 | * inode has been locked ever since it was created. | |
1573 | */ | |
7d095257 | 1574 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 LT |
1575 | |
1576 | /* | |
1577 | * xfs_trans_commit normally decrements the vnode ref count | |
1578 | * when it unlocks the inode. Since we want to return the | |
1579 | * vnode to the caller, we bump the vnode ref count now. | |
1580 | */ | |
1581 | IHOLD(ip); | |
1da177e4 | 1582 | |
f7c99b6f | 1583 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
517b5e8c CH |
1584 | if (error) |
1585 | goto out_abort_rele; | |
1da177e4 | 1586 | |
1c72bf90 | 1587 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1588 | if (error) { |
1589 | IRELE(ip); | |
517b5e8c | 1590 | goto out_dqrele; |
1da177e4 LT |
1591 | } |
1592 | ||
7d095257 CH |
1593 | xfs_qm_dqrele(udqp); |
1594 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1595 | |
979ebab1 | 1596 | *ipp = ip; |
1da177e4 LT |
1597 | |
1598 | /* Fallthrough to std_return with error = 0 */ | |
517b5e8c CH |
1599 | std_return: |
1600 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTCREATE)) { | |
1601 | XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, dp, DM_RIGHT_NULL, | |
1602 | ip, DM_RIGHT_NULL, name->name, NULL, mode, | |
1603 | error, 0); | |
1da177e4 | 1604 | } |
517b5e8c | 1605 | |
1da177e4 LT |
1606 | return error; |
1607 | ||
517b5e8c CH |
1608 | out_bmap_cancel: |
1609 | xfs_bmap_cancel(&free_list); | |
1610 | out_trans_abort: | |
1da177e4 | 1611 | cancel_flags |= XFS_TRANS_ABORT; |
517b5e8c CH |
1612 | out_trans_cancel: |
1613 | xfs_trans_cancel(tp, cancel_flags); | |
1614 | out_dqrele: | |
7d095257 CH |
1615 | xfs_qm_dqrele(udqp); |
1616 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1617 | |
993386c1 CH |
1618 | if (unlock_dp_on_error) |
1619 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
1620 | ||
1da177e4 LT |
1621 | goto std_return; |
1622 | ||
517b5e8c | 1623 | out_abort_rele: |
1da177e4 LT |
1624 | /* |
1625 | * Wait until after the current transaction is aborted to | |
1626 | * release the inode. This prevents recursive transactions | |
1627 | * and deadlocks from xfs_inactive. | |
1628 | */ | |
517b5e8c | 1629 | xfs_bmap_cancel(&free_list); |
1da177e4 LT |
1630 | cancel_flags |= XFS_TRANS_ABORT; |
1631 | xfs_trans_cancel(tp, cancel_flags); | |
1632 | IRELE(ip); | |
517b5e8c CH |
1633 | unlock_dp_on_error = B_FALSE; |
1634 | goto out_dqrele; | |
1da177e4 LT |
1635 | } |
1636 | ||
1da177e4 LT |
1637 | #ifdef DEBUG |
1638 | int xfs_locked_n; | |
1639 | int xfs_small_retries; | |
1640 | int xfs_middle_retries; | |
1641 | int xfs_lots_retries; | |
1642 | int xfs_lock_delays; | |
1643 | #endif | |
1644 | ||
f7c66ce3 LM |
1645 | /* |
1646 | * Bump the subclass so xfs_lock_inodes() acquires each lock with | |
1647 | * a different value | |
1648 | */ | |
1649 | static inline int | |
1650 | xfs_lock_inumorder(int lock_mode, int subclass) | |
1651 | { | |
1652 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) | |
0f1145cc | 1653 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
f7c66ce3 | 1654 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
0f1145cc | 1655 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
f7c66ce3 LM |
1656 | |
1657 | return lock_mode; | |
1658 | } | |
1659 | ||
1da177e4 LT |
1660 | /* |
1661 | * The following routine will lock n inodes in exclusive mode. | |
1662 | * We assume the caller calls us with the inodes in i_ino order. | |
1663 | * | |
1664 | * We need to detect deadlock where an inode that we lock | |
1665 | * is in the AIL and we start waiting for another inode that is locked | |
1666 | * by a thread in a long running transaction (such as truncate). This can | |
1667 | * result in deadlock since the long running trans might need to wait | |
1668 | * for the inode we just locked in order to push the tail and free space | |
1669 | * in the log. | |
1670 | */ | |
1671 | void | |
1672 | xfs_lock_inodes( | |
1673 | xfs_inode_t **ips, | |
1674 | int inodes, | |
1da177e4 LT |
1675 | uint lock_mode) |
1676 | { | |
1677 | int attempts = 0, i, j, try_lock; | |
1678 | xfs_log_item_t *lp; | |
1679 | ||
1680 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ | |
1681 | ||
cfa853e4 CH |
1682 | try_lock = 0; |
1683 | i = 0; | |
1da177e4 LT |
1684 | |
1685 | again: | |
1686 | for (; i < inodes; i++) { | |
1687 | ASSERT(ips[i]); | |
1688 | ||
1689 | if (i && (ips[i] == ips[i-1])) /* Already locked */ | |
1690 | continue; | |
1691 | ||
1692 | /* | |
1693 | * If try_lock is not set yet, make sure all locked inodes | |
1694 | * are not in the AIL. | |
1695 | * If any are, set try_lock to be used later. | |
1696 | */ | |
1697 | ||
1698 | if (!try_lock) { | |
1699 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
1700 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
1701 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1702 | try_lock++; | |
1703 | } | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | /* | |
1708 | * If any of the previous locks we have locked is in the AIL, | |
1709 | * we must TRY to get the second and subsequent locks. If | |
1710 | * we can't get any, we must release all we have | |
1711 | * and try again. | |
1712 | */ | |
1713 | ||
1714 | if (try_lock) { | |
1715 | /* try_lock must be 0 if i is 0. */ | |
1716 | /* | |
1717 | * try_lock means we have an inode locked | |
1718 | * that is in the AIL. | |
1719 | */ | |
1720 | ASSERT(i != 0); | |
f7c66ce3 | 1721 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
1da177e4 LT |
1722 | attempts++; |
1723 | ||
1724 | /* | |
1725 | * Unlock all previous guys and try again. | |
1726 | * xfs_iunlock will try to push the tail | |
1727 | * if the inode is in the AIL. | |
1728 | */ | |
1729 | ||
1730 | for(j = i - 1; j >= 0; j--) { | |
1731 | ||
1732 | /* | |
1733 | * Check to see if we've already | |
1734 | * unlocked this one. | |
1735 | * Not the first one going back, | |
1736 | * and the inode ptr is the same. | |
1737 | */ | |
1738 | if ((j != (i - 1)) && ips[j] == | |
1739 | ips[j+1]) | |
1740 | continue; | |
1741 | ||
1742 | xfs_iunlock(ips[j], lock_mode); | |
1743 | } | |
1744 | ||
1745 | if ((attempts % 5) == 0) { | |
1746 | delay(1); /* Don't just spin the CPU */ | |
1747 | #ifdef DEBUG | |
1748 | xfs_lock_delays++; | |
1749 | #endif | |
1750 | } | |
1751 | i = 0; | |
1752 | try_lock = 0; | |
1753 | goto again; | |
1754 | } | |
1755 | } else { | |
f7c66ce3 | 1756 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
1da177e4 LT |
1757 | } |
1758 | } | |
1759 | ||
1760 | #ifdef DEBUG | |
1761 | if (attempts) { | |
1762 | if (attempts < 5) xfs_small_retries++; | |
1763 | else if (attempts < 100) xfs_middle_retries++; | |
1764 | else xfs_lots_retries++; | |
1765 | } else { | |
1766 | xfs_locked_n++; | |
1767 | } | |
1768 | #endif | |
1769 | } | |
1770 | ||
f9114eba DC |
1771 | /* |
1772 | * xfs_lock_two_inodes() can only be used to lock one type of lock | |
1773 | * at a time - the iolock or the ilock, but not both at once. If | |
1774 | * we lock both at once, lockdep will report false positives saying | |
1775 | * we have violated locking orders. | |
1776 | */ | |
e1cccd91 CH |
1777 | void |
1778 | xfs_lock_two_inodes( | |
1779 | xfs_inode_t *ip0, | |
1780 | xfs_inode_t *ip1, | |
1781 | uint lock_mode) | |
1782 | { | |
1783 | xfs_inode_t *temp; | |
1784 | int attempts = 0; | |
1785 | xfs_log_item_t *lp; | |
1786 | ||
f9114eba DC |
1787 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
1788 | ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0); | |
e1cccd91 CH |
1789 | ASSERT(ip0->i_ino != ip1->i_ino); |
1790 | ||
1791 | if (ip0->i_ino > ip1->i_ino) { | |
1792 | temp = ip0; | |
1793 | ip0 = ip1; | |
1794 | ip1 = temp; | |
1795 | } | |
1796 | ||
1797 | again: | |
1798 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
1799 | ||
1800 | /* | |
1801 | * If the first lock we have locked is in the AIL, we must TRY to get | |
1802 | * the second lock. If we can't get it, we must release the first one | |
1803 | * and try again. | |
1804 | */ | |
1805 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
1806 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1807 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
1808 | xfs_iunlock(ip0, lock_mode); | |
1809 | if ((++attempts % 5) == 0) | |
1810 | delay(1); /* Don't just spin the CPU */ | |
1811 | goto again; | |
1812 | } | |
1813 | } else { | |
1814 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
1815 | } | |
1816 | } | |
1817 | ||
993386c1 | 1818 | int |
1da177e4 | 1819 | xfs_remove( |
993386c1 | 1820 | xfs_inode_t *dp, |
556b8b16 BN |
1821 | struct xfs_name *name, |
1822 | xfs_inode_t *ip) | |
1da177e4 | 1823 | { |
993386c1 | 1824 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1825 | xfs_trans_t *tp = NULL; |
8f112e3b | 1826 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
1da177e4 LT |
1827 | int error = 0; |
1828 | xfs_bmap_free_t free_list; | |
1829 | xfs_fsblock_t first_block; | |
1830 | int cancel_flags; | |
1831 | int committed; | |
1da177e4 LT |
1832 | int link_zero; |
1833 | uint resblks; | |
8f112e3b | 1834 | uint log_count; |
1da177e4 | 1835 | |
cf441eeb | 1836 | xfs_itrace_entry(dp); |
8f112e3b | 1837 | xfs_itrace_entry(ip); |
1da177e4 | 1838 | |
1da177e4 LT |
1839 | if (XFS_FORCED_SHUTDOWN(mp)) |
1840 | return XFS_ERROR(EIO); | |
1841 | ||
eb9df39d | 1842 | if (DM_EVENT_ENABLED(dp, DM_EVENT_REMOVE)) { |
556b8b16 BN |
1843 | error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dp, DM_RIGHT_NULL, |
1844 | NULL, DM_RIGHT_NULL, name->name, NULL, | |
1845 | ip->i_d.di_mode, 0, 0); | |
1da177e4 LT |
1846 | if (error) |
1847 | return error; | |
1848 | } | |
1849 | ||
7d095257 | 1850 | error = xfs_qm_dqattach(dp, 0); |
8f112e3b CH |
1851 | if (error) |
1852 | goto std_return; | |
1853 | ||
7d095257 | 1854 | error = xfs_qm_dqattach(ip, 0); |
8f112e3b | 1855 | if (error) |
1da177e4 | 1856 | goto std_return; |
1da177e4 | 1857 | |
8f112e3b CH |
1858 | if (is_dir) { |
1859 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); | |
1860 | log_count = XFS_DEFAULT_LOG_COUNT; | |
1861 | } else { | |
1862 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); | |
1863 | log_count = XFS_REMOVE_LOG_COUNT; | |
1864 | } | |
1da177e4 | 1865 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
8f112e3b | 1866 | |
1da177e4 LT |
1867 | /* |
1868 | * We try to get the real space reservation first, | |
1869 | * allowing for directory btree deletion(s) implying | |
1870 | * possible bmap insert(s). If we can't get the space | |
1871 | * reservation then we use 0 instead, and avoid the bmap | |
1872 | * btree insert(s) in the directory code by, if the bmap | |
1873 | * insert tries to happen, instead trimming the LAST | |
1874 | * block from the directory. | |
1875 | */ | |
1876 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
1877 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1878 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1879 | if (error == ENOSPC) { |
1880 | resblks = 0; | |
1881 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1882 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1883 | } |
1884 | if (error) { | |
1885 | ASSERT(error != ENOSPC); | |
8f112e3b CH |
1886 | cancel_flags = 0; |
1887 | goto out_trans_cancel; | |
1da177e4 LT |
1888 | } |
1889 | ||
e1cccd91 | 1890 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
1891 | |
1892 | /* | |
1893 | * At this point, we've gotten both the directory and the entry | |
1894 | * inodes locked. | |
1895 | */ | |
5df78e73 | 1896 | IHOLD(ip); |
1da177e4 | 1897 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
82dab941 CH |
1898 | |
1899 | IHOLD(dp); | |
1900 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
1da177e4 | 1901 | |
8f112e3b CH |
1902 | /* |
1903 | * If we're removing a directory perform some additional validation. | |
1904 | */ | |
1905 | if (is_dir) { | |
1906 | ASSERT(ip->i_d.di_nlink >= 2); | |
1907 | if (ip->i_d.di_nlink != 2) { | |
1908 | error = XFS_ERROR(ENOTEMPTY); | |
1909 | goto out_trans_cancel; | |
1910 | } | |
1911 | if (!xfs_dir_isempty(ip)) { | |
1912 | error = XFS_ERROR(ENOTEMPTY); | |
1913 | goto out_trans_cancel; | |
1914 | } | |
1915 | } | |
1916 | ||
9d87c319 | 1917 | xfs_bmap_init(&free_list, &first_block); |
556b8b16 | 1918 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
d4377d84 | 1919 | &first_block, &free_list, resblks); |
1da177e4 LT |
1920 | if (error) { |
1921 | ASSERT(error != ENOENT); | |
8f112e3b | 1922 | goto out_bmap_cancel; |
1da177e4 LT |
1923 | } |
1924 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1925 | ||
8f112e3b CH |
1926 | if (is_dir) { |
1927 | /* | |
1928 | * Drop the link from ip's "..". | |
1929 | */ | |
1930 | error = xfs_droplink(tp, dp); | |
1931 | if (error) | |
1932 | goto out_bmap_cancel; | |
1933 | ||
1934 | /* | |
2b7035fd | 1935 | * Drop the "." link from ip to self. |
8f112e3b CH |
1936 | */ |
1937 | error = xfs_droplink(tp, ip); | |
1938 | if (error) | |
1939 | goto out_bmap_cancel; | |
1940 | } else { | |
1941 | /* | |
1942 | * When removing a non-directory we need to log the parent | |
26c52951 DC |
1943 | * inode here. For a directory this is done implicitly |
1944 | * by the xfs_droplink call for the ".." entry. | |
8f112e3b CH |
1945 | */ |
1946 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1da177e4 LT |
1947 | } |
1948 | ||
8f112e3b | 1949 | /* |
2b7035fd | 1950 | * Drop the link from dp to ip. |
8f112e3b CH |
1951 | */ |
1952 | error = xfs_droplink(tp, ip); | |
1953 | if (error) | |
1954 | goto out_bmap_cancel; | |
1955 | ||
1956 | /* | |
1957 | * Determine if this is the last link while | |
1da177e4 LT |
1958 | * we are in the transaction. |
1959 | */ | |
8f112e3b | 1960 | link_zero = (ip->i_d.di_nlink == 0); |
1da177e4 | 1961 | |
1da177e4 LT |
1962 | /* |
1963 | * If this is a synchronous mount, make sure that the | |
1964 | * remove transaction goes to disk before returning to | |
1965 | * the user. | |
1966 | */ | |
8f112e3b | 1967 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 1968 | xfs_trans_set_sync(tp); |
1da177e4 | 1969 | |
f7c99b6f | 1970 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
8f112e3b CH |
1971 | if (error) |
1972 | goto out_bmap_cancel; | |
1da177e4 | 1973 | |
1c72bf90 | 1974 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
5df78e73 | 1975 | if (error) |
1da177e4 | 1976 | goto std_return; |
1da177e4 | 1977 | |
2a82b8be DC |
1978 | /* |
1979 | * If we are using filestreams, kill the stream association. | |
1980 | * If the file is still open it may get a new one but that | |
1981 | * will get killed on last close in xfs_close() so we don't | |
1982 | * have to worry about that. | |
1983 | */ | |
8f112e3b | 1984 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
2a82b8be DC |
1985 | xfs_filestream_deassociate(ip); |
1986 | ||
1da177e4 | 1987 | std_return: |
eb9df39d | 1988 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTREMOVE)) { |
8f112e3b CH |
1989 | XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE, dp, DM_RIGHT_NULL, |
1990 | NULL, DM_RIGHT_NULL, name->name, NULL, | |
1991 | ip->i_d.di_mode, error, 0); | |
1da177e4 | 1992 | } |
8f112e3b | 1993 | |
1da177e4 LT |
1994 | return error; |
1995 | ||
8f112e3b | 1996 | out_bmap_cancel: |
1da177e4 LT |
1997 | xfs_bmap_cancel(&free_list); |
1998 | cancel_flags |= XFS_TRANS_ABORT; | |
8f112e3b | 1999 | out_trans_cancel: |
1da177e4 LT |
2000 | xfs_trans_cancel(tp, cancel_flags); |
2001 | goto std_return; | |
1da177e4 LT |
2002 | } |
2003 | ||
993386c1 | 2004 | int |
1da177e4 | 2005 | xfs_link( |
993386c1 | 2006 | xfs_inode_t *tdp, |
a3da7896 | 2007 | xfs_inode_t *sip, |
556b8b16 | 2008 | struct xfs_name *target_name) |
1da177e4 | 2009 | { |
993386c1 | 2010 | xfs_mount_t *mp = tdp->i_mount; |
1da177e4 | 2011 | xfs_trans_t *tp; |
1da177e4 LT |
2012 | int error; |
2013 | xfs_bmap_free_t free_list; | |
2014 | xfs_fsblock_t first_block; | |
2015 | int cancel_flags; | |
2016 | int committed; | |
1da177e4 | 2017 | int resblks; |
1da177e4 | 2018 | |
cf441eeb | 2019 | xfs_itrace_entry(tdp); |
a3da7896 | 2020 | xfs_itrace_entry(sip); |
1da177e4 | 2021 | |
a3da7896 | 2022 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
1da177e4 | 2023 | |
1da177e4 LT |
2024 | if (XFS_FORCED_SHUTDOWN(mp)) |
2025 | return XFS_ERROR(EIO); | |
2026 | ||
eb9df39d | 2027 | if (DM_EVENT_ENABLED(tdp, DM_EVENT_LINK)) { |
1da177e4 | 2028 | error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK, |
bc4ac74a CH |
2029 | tdp, DM_RIGHT_NULL, |
2030 | sip, DM_RIGHT_NULL, | |
556b8b16 | 2031 | target_name->name, NULL, 0, 0, 0); |
1da177e4 LT |
2032 | if (error) |
2033 | return error; | |
2034 | } | |
2035 | ||
2036 | /* Return through std_return after this point. */ | |
2037 | ||
7d095257 | 2038 | error = xfs_qm_dqattach(sip, 0); |
cb3f35bb CH |
2039 | if (error) |
2040 | goto std_return; | |
2041 | ||
7d095257 | 2042 | error = xfs_qm_dqattach(tdp, 0); |
1da177e4 LT |
2043 | if (error) |
2044 | goto std_return; | |
2045 | ||
2046 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); | |
2047 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 2048 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
1da177e4 LT |
2049 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
2050 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
2051 | if (error == ENOSPC) { | |
2052 | resblks = 0; | |
2053 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, | |
2054 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
2055 | } | |
2056 | if (error) { | |
2057 | cancel_flags = 0; | |
2058 | goto error_return; | |
2059 | } | |
2060 | ||
e1cccd91 | 2061 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
1da177e4 LT |
2062 | |
2063 | /* | |
2064 | * Increment vnode ref counts since xfs_trans_commit & | |
2065 | * xfs_trans_cancel will both unlock the inodes and | |
2066 | * decrement the associated ref counts. | |
2067 | */ | |
a3da7896 CH |
2068 | IHOLD(sip); |
2069 | IHOLD(tdp); | |
1da177e4 LT |
2070 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); |
2071 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); | |
2072 | ||
2073 | /* | |
2074 | * If the source has too many links, we can't make any more to it. | |
2075 | */ | |
2076 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { | |
2077 | error = XFS_ERROR(EMLINK); | |
2078 | goto error_return; | |
2079 | } | |
2080 | ||
365ca83d NS |
2081 | /* |
2082 | * If we are using project inheritance, we only allow hard link | |
2083 | * creation in our tree when the project IDs are the same; else | |
2084 | * the tree quota mechanism could be circumvented. | |
2085 | */ | |
2086 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
2087 | (tdp->i_d.di_projid != sip->i_d.di_projid))) { | |
b1ecdda9 | 2088 | error = XFS_ERROR(EXDEV); |
365ca83d NS |
2089 | goto error_return; |
2090 | } | |
2091 | ||
556b8b16 BN |
2092 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
2093 | if (error) | |
1da177e4 LT |
2094 | goto error_return; |
2095 | ||
9d87c319 | 2096 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 | 2097 | |
556b8b16 BN |
2098 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
2099 | &first_block, &free_list, resblks); | |
1da177e4 LT |
2100 | if (error) |
2101 | goto abort_return; | |
2102 | xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1da177e4 LT |
2103 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
2104 | ||
2105 | error = xfs_bumplink(tp, sip); | |
b71d300c | 2106 | if (error) |
1da177e4 | 2107 | goto abort_return; |
1da177e4 LT |
2108 | |
2109 | /* | |
2110 | * If this is a synchronous mount, make sure that the | |
2111 | * link transaction goes to disk before returning to | |
2112 | * the user. | |
2113 | */ | |
2114 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2115 | xfs_trans_set_sync(tp); | |
2116 | } | |
2117 | ||
f7c99b6f | 2118 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
2119 | if (error) { |
2120 | xfs_bmap_cancel(&free_list); | |
2121 | goto abort_return; | |
2122 | } | |
2123 | ||
1c72bf90 | 2124 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
b71d300c | 2125 | if (error) |
1da177e4 | 2126 | goto std_return; |
1da177e4 LT |
2127 | |
2128 | /* Fall through to std_return with error = 0. */ | |
2129 | std_return: | |
eb9df39d | 2130 | if (DM_EVENT_ENABLED(sip, DM_EVENT_POSTLINK)) { |
1da177e4 | 2131 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK, |
bc4ac74a CH |
2132 | tdp, DM_RIGHT_NULL, |
2133 | sip, DM_RIGHT_NULL, | |
556b8b16 | 2134 | target_name->name, NULL, 0, error, 0); |
1da177e4 LT |
2135 | } |
2136 | return error; | |
2137 | ||
2138 | abort_return: | |
2139 | cancel_flags |= XFS_TRANS_ABORT; | |
2140 | /* FALLTHROUGH */ | |
014c2544 | 2141 | |
1da177e4 LT |
2142 | error_return: |
2143 | xfs_trans_cancel(tp, cancel_flags); | |
1da177e4 LT |
2144 | goto std_return; |
2145 | } | |
b71d300c | 2146 | |
993386c1 | 2147 | int |
1da177e4 | 2148 | xfs_symlink( |
993386c1 | 2149 | xfs_inode_t *dp, |
556b8b16 BN |
2150 | struct xfs_name *link_name, |
2151 | const char *target_path, | |
3e5daf05 | 2152 | mode_t mode, |
3937be5b | 2153 | xfs_inode_t **ipp, |
1da177e4 LT |
2154 | cred_t *credp) |
2155 | { | |
993386c1 | 2156 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 2157 | xfs_trans_t *tp; |
1da177e4 LT |
2158 | xfs_inode_t *ip; |
2159 | int error; | |
2160 | int pathlen; | |
2161 | xfs_bmap_free_t free_list; | |
2162 | xfs_fsblock_t first_block; | |
993386c1 | 2163 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
2164 | uint cancel_flags; |
2165 | int committed; | |
2166 | xfs_fileoff_t first_fsb; | |
2167 | xfs_filblks_t fs_blocks; | |
2168 | int nmaps; | |
2169 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
2170 | xfs_daddr_t d; | |
556b8b16 | 2171 | const char *cur_chunk; |
1da177e4 LT |
2172 | int byte_cnt; |
2173 | int n; | |
2174 | xfs_buf_t *bp; | |
2175 | xfs_prid_t prid; | |
2176 | struct xfs_dquot *udqp, *gdqp; | |
2177 | uint resblks; | |
1da177e4 | 2178 | |
3937be5b | 2179 | *ipp = NULL; |
1da177e4 LT |
2180 | error = 0; |
2181 | ip = NULL; | |
2182 | tp = NULL; | |
2183 | ||
cf441eeb | 2184 | xfs_itrace_entry(dp); |
1da177e4 LT |
2185 | |
2186 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2187 | return XFS_ERROR(EIO); | |
2188 | ||
1da177e4 LT |
2189 | /* |
2190 | * Check component lengths of the target path name. | |
2191 | */ | |
2192 | pathlen = strlen(target_path); | |
2193 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
2194 | return XFS_ERROR(ENAMETOOLONG); | |
1da177e4 | 2195 | |
eb9df39d | 2196 | if (DM_EVENT_ENABLED(dp, DM_EVENT_SYMLINK)) { |
bc4ac74a | 2197 | error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dp, |
1da177e4 | 2198 | DM_RIGHT_NULL, NULL, DM_RIGHT_NULL, |
046ea753 DC |
2199 | link_name->name, |
2200 | (unsigned char *)target_path, 0, 0, 0); | |
1da177e4 LT |
2201 | if (error) |
2202 | return error; | |
2203 | } | |
2204 | ||
2205 | /* Return through std_return after this point. */ | |
2206 | ||
2207 | udqp = gdqp = NULL; | |
365ca83d NS |
2208 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
2209 | prid = dp->i_d.di_projid; | |
1da177e4 LT |
2210 | else |
2211 | prid = (xfs_prid_t)dfltprid; | |
2212 | ||
2213 | /* | |
2214 | * Make sure that we have allocated dquot(s) on disk. | |
2215 | */ | |
7d095257 | 2216 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
1da177e4 LT |
2217 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
2218 | if (error) | |
2219 | goto std_return; | |
2220 | ||
2221 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
2222 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
2223 | /* | |
2224 | * The symlink will fit into the inode data fork? | |
2225 | * There can't be any attributes so we get the whole variable part. | |
2226 | */ | |
2227 | if (pathlen <= XFS_LITINO(mp)) | |
2228 | fs_blocks = 0; | |
2229 | else | |
2230 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); | |
556b8b16 | 2231 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
1da177e4 LT |
2232 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
2233 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
2234 | if (error == ENOSPC && fs_blocks == 0) { | |
2235 | resblks = 0; | |
2236 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, | |
2237 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
2238 | } | |
2239 | if (error) { | |
2240 | cancel_flags = 0; | |
1da177e4 LT |
2241 | goto error_return; |
2242 | } | |
2243 | ||
f7c66ce3 | 2244 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 2245 | unlock_dp_on_error = B_TRUE; |
1da177e4 LT |
2246 | |
2247 | /* | |
2248 | * Check whether the directory allows new symlinks or not. | |
2249 | */ | |
2250 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
2251 | error = XFS_ERROR(EPERM); | |
2252 | goto error_return; | |
2253 | } | |
2254 | ||
2255 | /* | |
2256 | * Reserve disk quota : blocks and inode. | |
2257 | */ | |
7d095257 | 2258 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 LT |
2259 | if (error) |
2260 | goto error_return; | |
2261 | ||
2262 | /* | |
2263 | * Check for ability to enter directory entry, if no space reserved. | |
2264 | */ | |
556b8b16 BN |
2265 | error = xfs_dir_canenter(tp, dp, link_name, resblks); |
2266 | if (error) | |
1da177e4 LT |
2267 | goto error_return; |
2268 | /* | |
2269 | * Initialize the bmap freelist prior to calling either | |
2270 | * bmapi or the directory create code. | |
2271 | */ | |
9d87c319 | 2272 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
2273 | |
2274 | /* | |
2275 | * Allocate an inode for the symlink. | |
2276 | */ | |
3e5daf05 | 2277 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), |
1da177e4 LT |
2278 | 1, 0, credp, prid, resblks > 0, &ip, NULL); |
2279 | if (error) { | |
2280 | if (error == ENOSPC) | |
2281 | goto error_return; | |
2282 | goto error1; | |
2283 | } | |
1da177e4 | 2284 | |
993386c1 CH |
2285 | /* |
2286 | * An error after we've joined dp to the transaction will result in the | |
2287 | * transaction cancel unlocking dp so don't do it explicitly in the | |
2288 | * error path. | |
2289 | */ | |
3937be5b | 2290 | IHOLD(dp); |
1da177e4 | 2291 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 2292 | unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
2293 | |
2294 | /* | |
2295 | * Also attach the dquot(s) to it, if applicable. | |
2296 | */ | |
7d095257 | 2297 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 LT |
2298 | |
2299 | if (resblks) | |
2300 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
2301 | /* | |
2302 | * If the symlink will fit into the inode, write it inline. | |
2303 | */ | |
2304 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
2305 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
2306 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
2307 | ip->i_d.di_size = pathlen; | |
2308 | ||
2309 | /* | |
2310 | * The inode was initially created in extent format. | |
2311 | */ | |
2312 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
2313 | ip->i_df.if_flags |= XFS_IFINLINE; | |
2314 | ||
2315 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
2316 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
2317 | ||
2318 | } else { | |
2319 | first_fsb = 0; | |
2320 | nmaps = SYMLINK_MAPS; | |
2321 | ||
2322 | error = xfs_bmapi(tp, ip, first_fsb, fs_blocks, | |
2323 | XFS_BMAPI_WRITE | XFS_BMAPI_METADATA, | |
2324 | &first_block, resblks, mval, &nmaps, | |
3e57ecf6 | 2325 | &free_list, NULL); |
1da177e4 LT |
2326 | if (error) { |
2327 | goto error1; | |
2328 | } | |
2329 | ||
2330 | if (resblks) | |
2331 | resblks -= fs_blocks; | |
2332 | ip->i_d.di_size = pathlen; | |
2333 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
2334 | ||
2335 | cur_chunk = target_path; | |
2336 | for (n = 0; n < nmaps; n++) { | |
2337 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
2338 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
2339 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
2340 | BTOBB(byte_cnt), 0); | |
2341 | ASSERT(bp && !XFS_BUF_GETERROR(bp)); | |
2342 | if (pathlen < byte_cnt) { | |
2343 | byte_cnt = pathlen; | |
2344 | } | |
2345 | pathlen -= byte_cnt; | |
2346 | ||
2347 | memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt); | |
2348 | cur_chunk += byte_cnt; | |
2349 | ||
2350 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); | |
2351 | } | |
2352 | } | |
2353 | ||
2354 | /* | |
2355 | * Create the directory entry for the symlink. | |
2356 | */ | |
556b8b16 BN |
2357 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, |
2358 | &first_block, &free_list, resblks); | |
f6c2d1fa | 2359 | if (error) |
1da177e4 | 2360 | goto error1; |
1da177e4 LT |
2361 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
2362 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
2363 | ||
1da177e4 LT |
2364 | /* |
2365 | * If this is a synchronous mount, make sure that the | |
2366 | * symlink transaction goes to disk before returning to | |
2367 | * the user. | |
2368 | */ | |
2369 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2370 | xfs_trans_set_sync(tp); | |
2371 | } | |
2372 | ||
2373 | /* | |
2374 | * xfs_trans_commit normally decrements the vnode ref count | |
2375 | * when it unlocks the inode. Since we want to return the | |
2376 | * vnode to the caller, we bump the vnode ref count now. | |
2377 | */ | |
2378 | IHOLD(ip); | |
2379 | ||
f7c99b6f | 2380 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2381 | if (error) { |
2382 | goto error2; | |
2383 | } | |
1c72bf90 | 2384 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
7d095257 CH |
2385 | xfs_qm_dqrele(udqp); |
2386 | xfs_qm_dqrele(gdqp); | |
1da177e4 LT |
2387 | |
2388 | /* Fall through to std_return with error = 0 or errno from | |
2389 | * xfs_trans_commit */ | |
2390 | std_return: | |
993386c1 | 2391 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTSYMLINK)) { |
1da177e4 | 2392 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK, |
bc4ac74a CH |
2393 | dp, DM_RIGHT_NULL, |
2394 | error ? NULL : ip, | |
556b8b16 | 2395 | DM_RIGHT_NULL, link_name->name, |
046ea753 DC |
2396 | (unsigned char *)target_path, |
2397 | 0, error, 0); | |
1da177e4 LT |
2398 | } |
2399 | ||
3937be5b CH |
2400 | if (!error) |
2401 | *ipp = ip; | |
1da177e4 LT |
2402 | return error; |
2403 | ||
2404 | error2: | |
2405 | IRELE(ip); | |
2406 | error1: | |
2407 | xfs_bmap_cancel(&free_list); | |
2408 | cancel_flags |= XFS_TRANS_ABORT; | |
2409 | error_return: | |
2410 | xfs_trans_cancel(tp, cancel_flags); | |
7d095257 CH |
2411 | xfs_qm_dqrele(udqp); |
2412 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 2413 | |
993386c1 | 2414 | if (unlock_dp_on_error) |
1da177e4 | 2415 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
1da177e4 LT |
2416 | |
2417 | goto std_return; | |
2418 | } | |
2419 | ||
1da177e4 | 2420 | int |
993386c1 CH |
2421 | xfs_set_dmattrs( |
2422 | xfs_inode_t *ip, | |
1da177e4 | 2423 | u_int evmask, |
993386c1 | 2424 | u_int16_t state) |
1da177e4 | 2425 | { |
993386c1 | 2426 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 2427 | xfs_trans_t *tp; |
1da177e4 LT |
2428 | int error; |
2429 | ||
2430 | if (!capable(CAP_SYS_ADMIN)) | |
2431 | return XFS_ERROR(EPERM); | |
2432 | ||
1da177e4 LT |
2433 | if (XFS_FORCED_SHUTDOWN(mp)) |
2434 | return XFS_ERROR(EIO); | |
2435 | ||
2436 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
2437 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
2438 | if (error) { | |
2439 | xfs_trans_cancel(tp, 0); | |
2440 | return error; | |
2441 | } | |
2442 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2443 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2444 | ||
613d7043 CH |
2445 | ip->i_d.di_dmevmask = evmask; |
2446 | ip->i_d.di_dmstate = state; | |
1da177e4 LT |
2447 | |
2448 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
2449 | IHOLD(ip); | |
1c72bf90 | 2450 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
2451 | |
2452 | return error; | |
2453 | } | |
2454 | ||
1da177e4 LT |
2455 | /* |
2456 | * xfs_alloc_file_space() | |
2457 | * This routine allocates disk space for the given file. | |
2458 | * | |
2459 | * If alloc_type == 0, this request is for an ALLOCSP type | |
2460 | * request which will change the file size. In this case, no | |
2461 | * DMAPI event will be generated by the call. A TRUNCATE event | |
2462 | * will be generated later by xfs_setattr. | |
2463 | * | |
2464 | * If alloc_type != 0, this request is for a RESVSP type | |
2465 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the | |
2466 | * lower block boundary byte address is less than the file's | |
2467 | * length. | |
2468 | * | |
2469 | * RETURNS: | |
2470 | * 0 on success | |
2471 | * errno on error | |
2472 | * | |
2473 | */ | |
ba0f32d4 | 2474 | STATIC int |
1da177e4 LT |
2475 | xfs_alloc_file_space( |
2476 | xfs_inode_t *ip, | |
2477 | xfs_off_t offset, | |
2478 | xfs_off_t len, | |
2479 | int alloc_type, | |
2480 | int attr_flags) | |
2481 | { | |
dd9f438e NS |
2482 | xfs_mount_t *mp = ip->i_mount; |
2483 | xfs_off_t count; | |
1da177e4 LT |
2484 | xfs_filblks_t allocated_fsb; |
2485 | xfs_filblks_t allocatesize_fsb; | |
dd9f438e NS |
2486 | xfs_extlen_t extsz, temp; |
2487 | xfs_fileoff_t startoffset_fsb; | |
1da177e4 | 2488 | xfs_fsblock_t firstfsb; |
dd9f438e NS |
2489 | int nimaps; |
2490 | int bmapi_flag; | |
2491 | int quota_flag; | |
1da177e4 | 2492 | int rt; |
1da177e4 | 2493 | xfs_trans_t *tp; |
dd9f438e NS |
2494 | xfs_bmbt_irec_t imaps[1], *imapp; |
2495 | xfs_bmap_free_t free_list; | |
2496 | uint qblocks, resblks, resrtextents; | |
2497 | int committed; | |
2498 | int error; | |
1da177e4 | 2499 | |
cf441eeb | 2500 | xfs_itrace_entry(ip); |
1da177e4 LT |
2501 | |
2502 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2503 | return XFS_ERROR(EIO); | |
2504 | ||
7d095257 CH |
2505 | error = xfs_qm_dqattach(ip, 0); |
2506 | if (error) | |
1da177e4 LT |
2507 | return error; |
2508 | ||
2509 | if (len <= 0) | |
2510 | return XFS_ERROR(EINVAL); | |
2511 | ||
957d0ebe DC |
2512 | rt = XFS_IS_REALTIME_INODE(ip); |
2513 | extsz = xfs_get_extsz_hint(ip); | |
2514 | ||
1da177e4 | 2515 | count = len; |
1da177e4 | 2516 | imapp = &imaps[0]; |
dd9f438e NS |
2517 | nimaps = 1; |
2518 | bmapi_flag = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0); | |
1da177e4 LT |
2519 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
2520 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); | |
2521 | ||
2522 | /* Generate a DMAPI event if needed. */ | |
ba87ea69 | 2523 | if (alloc_type != 0 && offset < ip->i_size && |
0f285c8a | 2524 | (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 2525 | DM_EVENT_ENABLED(ip, DM_EVENT_WRITE)) { |
1da177e4 LT |
2526 | xfs_off_t end_dmi_offset; |
2527 | ||
2528 | end_dmi_offset = offset+len; | |
ba87ea69 LM |
2529 | if (end_dmi_offset > ip->i_size) |
2530 | end_dmi_offset = ip->i_size; | |
bc4ac74a CH |
2531 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, ip, offset, |
2532 | end_dmi_offset - offset, 0, NULL); | |
1da177e4 | 2533 | if (error) |
014c2544 | 2534 | return error; |
1da177e4 LT |
2535 | } |
2536 | ||
2537 | /* | |
dd9f438e | 2538 | * Allocate file space until done or until there is an error |
1da177e4 LT |
2539 | */ |
2540 | retry: | |
2541 | while (allocatesize_fsb && !error) { | |
dd9f438e NS |
2542 | xfs_fileoff_t s, e; |
2543 | ||
1da177e4 | 2544 | /* |
3ddb8fa9 | 2545 | * Determine space reservations for data/realtime. |
1da177e4 | 2546 | */ |
dd9f438e | 2547 | if (unlikely(extsz)) { |
1da177e4 | 2548 | s = startoffset_fsb; |
dd9f438e NS |
2549 | do_div(s, extsz); |
2550 | s *= extsz; | |
2551 | e = startoffset_fsb + allocatesize_fsb; | |
2552 | if ((temp = do_mod(startoffset_fsb, extsz))) | |
2553 | e += temp; | |
2554 | if ((temp = do_mod(e, extsz))) | |
2555 | e += extsz - temp; | |
2556 | } else { | |
2557 | s = 0; | |
2558 | e = allocatesize_fsb; | |
2559 | } | |
2560 | ||
2561 | if (unlikely(rt)) { | |
2562 | resrtextents = qblocks = (uint)(e - s); | |
2563 | resrtextents /= mp->m_sb.sb_rextsize; | |
2564 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
2565 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
1da177e4 | 2566 | } else { |
dd9f438e NS |
2567 | resrtextents = 0; |
2568 | resblks = qblocks = \ | |
2569 | XFS_DIOSTRAT_SPACE_RES(mp, (uint)(e - s)); | |
2570 | quota_flag = XFS_QMOPT_RES_REGBLKS; | |
1da177e4 LT |
2571 | } |
2572 | ||
2573 | /* | |
dd9f438e | 2574 | * Allocate and setup the transaction. |
1da177e4 LT |
2575 | */ |
2576 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
dd9f438e NS |
2577 | error = xfs_trans_reserve(tp, resblks, |
2578 | XFS_WRITE_LOG_RES(mp), resrtextents, | |
1da177e4 LT |
2579 | XFS_TRANS_PERM_LOG_RES, |
2580 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 2581 | /* |
dd9f438e | 2582 | * Check for running out of space |
1da177e4 LT |
2583 | */ |
2584 | if (error) { | |
2585 | /* | |
2586 | * Free the transaction structure. | |
2587 | */ | |
2588 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
2589 | xfs_trans_cancel(tp, 0); | |
2590 | break; | |
2591 | } | |
2592 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
2593 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, |
2594 | 0, quota_flag); | |
1da177e4 LT |
2595 | if (error) |
2596 | goto error1; | |
2597 | ||
2598 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2599 | xfs_trans_ihold(tp, ip); | |
2600 | ||
2601 | /* | |
dd9f438e | 2602 | * Issue the xfs_bmapi() call to allocate the blocks |
1da177e4 | 2603 | */ |
9d87c319 | 2604 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 2605 | error = xfs_bmapi(tp, ip, startoffset_fsb, |
dd9f438e NS |
2606 | allocatesize_fsb, bmapi_flag, |
2607 | &firstfsb, 0, imapp, &nimaps, | |
3e57ecf6 | 2608 | &free_list, NULL); |
1da177e4 LT |
2609 | if (error) { |
2610 | goto error0; | |
2611 | } | |
2612 | ||
2613 | /* | |
dd9f438e | 2614 | * Complete the transaction |
1da177e4 | 2615 | */ |
f7c99b6f | 2616 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2617 | if (error) { |
2618 | goto error0; | |
2619 | } | |
2620 | ||
1c72bf90 | 2621 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2622 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2623 | if (error) { | |
2624 | break; | |
2625 | } | |
2626 | ||
2627 | allocated_fsb = imapp->br_blockcount; | |
2628 | ||
dd9f438e | 2629 | if (nimaps == 0) { |
1da177e4 LT |
2630 | error = XFS_ERROR(ENOSPC); |
2631 | break; | |
2632 | } | |
2633 | ||
2634 | startoffset_fsb += allocated_fsb; | |
2635 | allocatesize_fsb -= allocated_fsb; | |
2636 | } | |
2637 | dmapi_enospc_check: | |
0f285c8a | 2638 | if (error == ENOSPC && (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 2639 | DM_EVENT_ENABLED(ip, DM_EVENT_NOSPACE)) { |
1da177e4 | 2640 | error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE, |
bc4ac74a CH |
2641 | ip, DM_RIGHT_NULL, |
2642 | ip, DM_RIGHT_NULL, | |
1da177e4 LT |
2643 | NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */ |
2644 | if (error == 0) | |
2645 | goto retry; /* Maybe DMAPI app. has made space */ | |
2646 | /* else fall through with error from XFS_SEND_DATA */ | |
2647 | } | |
2648 | ||
2649 | return error; | |
2650 | ||
dd9f438e | 2651 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 2652 | xfs_bmap_cancel(&free_list); |
7d095257 | 2653 | xfs_trans_unreserve_quota_nblks(tp, ip, qblocks, 0, quota_flag); |
dd9f438e NS |
2654 | |
2655 | error1: /* Just cancel transaction */ | |
1da177e4 LT |
2656 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
2657 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
2658 | goto dmapi_enospc_check; | |
2659 | } | |
2660 | ||
2661 | /* | |
2662 | * Zero file bytes between startoff and endoff inclusive. | |
2663 | * The iolock is held exclusive and no blocks are buffered. | |
2fd6f6ec LM |
2664 | * |
2665 | * This function is used by xfs_free_file_space() to zero | |
2666 | * partial blocks when the range to free is not block aligned. | |
2667 | * When unreserving space with boundaries that are not block | |
2668 | * aligned we round up the start and round down the end | |
2669 | * boundaries and then use this function to zero the parts of | |
2670 | * the blocks that got dropped during the rounding. | |
1da177e4 LT |
2671 | */ |
2672 | STATIC int | |
2673 | xfs_zero_remaining_bytes( | |
2674 | xfs_inode_t *ip, | |
2675 | xfs_off_t startoff, | |
2676 | xfs_off_t endoff) | |
2677 | { | |
2678 | xfs_bmbt_irec_t imap; | |
2679 | xfs_fileoff_t offset_fsb; | |
2680 | xfs_off_t lastoffset; | |
2681 | xfs_off_t offset; | |
2682 | xfs_buf_t *bp; | |
2683 | xfs_mount_t *mp = ip->i_mount; | |
2684 | int nimap; | |
2685 | int error = 0; | |
2686 | ||
2fd6f6ec LM |
2687 | /* |
2688 | * Avoid doing I/O beyond eof - it's not necessary | |
2689 | * since nothing can read beyond eof. The space will | |
2690 | * be zeroed when the file is extended anyway. | |
2691 | */ | |
2692 | if (startoff >= ip->i_size) | |
2693 | return 0; | |
2694 | ||
2695 | if (endoff > ip->i_size) | |
2696 | endoff = ip->i_size; | |
2697 | ||
1da177e4 | 2698 | bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize, |
71ddabb9 | 2699 | XFS_IS_REALTIME_INODE(ip) ? |
1da177e4 | 2700 | mp->m_rtdev_targp : mp->m_ddev_targp); |
c6422617 LM |
2701 | if (!bp) |
2702 | return XFS_ERROR(ENOMEM); | |
1da177e4 LT |
2703 | |
2704 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { | |
2705 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
2706 | nimap = 1; | |
541d7d3c | 2707 | error = xfs_bmapi(NULL, ip, offset_fsb, 1, 0, |
3e57ecf6 | 2708 | NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
2709 | if (error || nimap < 1) |
2710 | break; | |
2711 | ASSERT(imap.br_blockcount >= 1); | |
2712 | ASSERT(imap.br_startoff == offset_fsb); | |
2713 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; | |
2714 | if (lastoffset > endoff) | |
2715 | lastoffset = endoff; | |
2716 | if (imap.br_startblock == HOLESTARTBLOCK) | |
2717 | continue; | |
2718 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2719 | if (imap.br_state == XFS_EXT_UNWRITTEN) | |
2720 | continue; | |
2721 | XFS_BUF_UNDONE(bp); | |
2722 | XFS_BUF_UNWRITE(bp); | |
2723 | XFS_BUF_READ(bp); | |
9d87c319 | 2724 | XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock)); |
1da177e4 | 2725 | xfsbdstrat(mp, bp); |
d64e31a2 DC |
2726 | error = xfs_iowait(bp); |
2727 | if (error) { | |
1da177e4 LT |
2728 | xfs_ioerror_alert("xfs_zero_remaining_bytes(read)", |
2729 | mp, bp, XFS_BUF_ADDR(bp)); | |
2730 | break; | |
2731 | } | |
2732 | memset(XFS_BUF_PTR(bp) + | |
2733 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), | |
2734 | 0, lastoffset - offset + 1); | |
2735 | XFS_BUF_UNDONE(bp); | |
2736 | XFS_BUF_UNREAD(bp); | |
2737 | XFS_BUF_WRITE(bp); | |
2738 | xfsbdstrat(mp, bp); | |
d64e31a2 DC |
2739 | error = xfs_iowait(bp); |
2740 | if (error) { | |
1da177e4 LT |
2741 | xfs_ioerror_alert("xfs_zero_remaining_bytes(write)", |
2742 | mp, bp, XFS_BUF_ADDR(bp)); | |
2743 | break; | |
2744 | } | |
2745 | } | |
2746 | xfs_buf_free(bp); | |
2747 | return error; | |
2748 | } | |
2749 | ||
2750 | /* | |
2751 | * xfs_free_file_space() | |
2752 | * This routine frees disk space for the given file. | |
2753 | * | |
2754 | * This routine is only called by xfs_change_file_space | |
2755 | * for an UNRESVSP type call. | |
2756 | * | |
2757 | * RETURNS: | |
2758 | * 0 on success | |
2759 | * errno on error | |
2760 | * | |
2761 | */ | |
2762 | STATIC int | |
2763 | xfs_free_file_space( | |
2764 | xfs_inode_t *ip, | |
2765 | xfs_off_t offset, | |
2766 | xfs_off_t len, | |
2767 | int attr_flags) | |
2768 | { | |
2769 | int committed; | |
2770 | int done; | |
2771 | xfs_off_t end_dmi_offset; | |
2772 | xfs_fileoff_t endoffset_fsb; | |
2773 | int error; | |
2774 | xfs_fsblock_t firstfsb; | |
2775 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
2776 | xfs_bmbt_irec_t imap; |
2777 | xfs_off_t ioffset; | |
2778 | xfs_extlen_t mod=0; | |
2779 | xfs_mount_t *mp; | |
2780 | int nimap; | |
2781 | uint resblks; | |
673cdf5c | 2782 | uint rounding; |
1da177e4 LT |
2783 | int rt; |
2784 | xfs_fileoff_t startoffset_fsb; | |
2785 | xfs_trans_t *tp; | |
5fcbab35 | 2786 | int need_iolock = 1; |
1da177e4 | 2787 | |
1da177e4 LT |
2788 | mp = ip->i_mount; |
2789 | ||
cf441eeb | 2790 | xfs_itrace_entry(ip); |
bd5a876a | 2791 | |
7d095257 CH |
2792 | error = xfs_qm_dqattach(ip, 0); |
2793 | if (error) | |
1da177e4 LT |
2794 | return error; |
2795 | ||
2796 | error = 0; | |
2797 | if (len <= 0) /* if nothing being freed */ | |
2798 | return error; | |
71ddabb9 | 2799 | rt = XFS_IS_REALTIME_INODE(ip); |
1da177e4 LT |
2800 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
2801 | end_dmi_offset = offset + len; | |
2802 | endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset); | |
2803 | ||
0f285c8a | 2804 | if (offset < ip->i_size && (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 2805 | DM_EVENT_ENABLED(ip, DM_EVENT_WRITE)) { |
ba87ea69 LM |
2806 | if (end_dmi_offset > ip->i_size) |
2807 | end_dmi_offset = ip->i_size; | |
bc4ac74a | 2808 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, ip, |
1da177e4 LT |
2809 | offset, end_dmi_offset - offset, |
2810 | AT_DELAY_FLAG(attr_flags), NULL); | |
2811 | if (error) | |
014c2544 | 2812 | return error; |
1da177e4 LT |
2813 | } |
2814 | ||
0f285c8a | 2815 | if (attr_flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 2816 | need_iolock = 0; |
9fa8046f | 2817 | if (need_iolock) { |
1da177e4 | 2818 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
25e41b3d CH |
2819 | /* wait for the completion of any pending DIOs */ |
2820 | xfs_ioend_wait(ip); | |
9fa8046f | 2821 | } |
5fcbab35 | 2822 | |
e6a4b37f | 2823 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
1da177e4 | 2824 | ioffset = offset & ~(rounding - 1); |
bd5a876a | 2825 | |
df80c933 | 2826 | if (VN_CACHED(VFS_I(ip)) != 0) { |
e6a4b37f | 2827 | error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); |
d3cf2094 LM |
2828 | if (error) |
2829 | goto out_unlock_iolock; | |
bd5a876a CH |
2830 | } |
2831 | ||
1da177e4 LT |
2832 | /* |
2833 | * Need to zero the stuff we're not freeing, on disk. | |
9da096fd | 2834 | * If it's a realtime file & can't use unwritten extents then we |
1da177e4 LT |
2835 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
2836 | * will take care of it for us. | |
2837 | */ | |
62118709 | 2838 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 | 2839 | nimap = 1; |
541d7d3c | 2840 | error = xfs_bmapi(NULL, ip, startoffset_fsb, |
3e57ecf6 | 2841 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
2842 | if (error) |
2843 | goto out_unlock_iolock; | |
2844 | ASSERT(nimap == 0 || nimap == 1); | |
2845 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2846 | xfs_daddr_t block; | |
2847 | ||
2848 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2849 | block = imap.br_startblock; | |
2850 | mod = do_div(block, mp->m_sb.sb_rextsize); | |
2851 | if (mod) | |
2852 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; | |
2853 | } | |
2854 | nimap = 1; | |
541d7d3c | 2855 | error = xfs_bmapi(NULL, ip, endoffset_fsb - 1, |
3e57ecf6 | 2856 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
2857 | if (error) |
2858 | goto out_unlock_iolock; | |
2859 | ASSERT(nimap == 0 || nimap == 1); | |
2860 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2861 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2862 | mod++; | |
2863 | if (mod && (mod != mp->m_sb.sb_rextsize)) | |
2864 | endoffset_fsb -= mod; | |
2865 | } | |
2866 | } | |
2867 | if ((done = (endoffset_fsb <= startoffset_fsb))) | |
2868 | /* | |
2869 | * One contiguous piece to clear | |
2870 | */ | |
2871 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); | |
2872 | else { | |
2873 | /* | |
2874 | * Some full blocks, possibly two pieces to clear | |
2875 | */ | |
2876 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) | |
2877 | error = xfs_zero_remaining_bytes(ip, offset, | |
2878 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); | |
2879 | if (!error && | |
2880 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) | |
2881 | error = xfs_zero_remaining_bytes(ip, | |
2882 | XFS_FSB_TO_B(mp, endoffset_fsb), | |
2883 | offset + len - 1); | |
2884 | } | |
2885 | ||
2886 | /* | |
2887 | * free file space until done or until there is an error | |
2888 | */ | |
2889 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
2890 | while (!error && !done) { | |
2891 | ||
2892 | /* | |
91ebecc7 DC |
2893 | * allocate and setup the transaction. Allow this |
2894 | * transaction to dip into the reserve blocks to ensure | |
2895 | * the freeing of the space succeeds at ENOSPC. | |
1da177e4 LT |
2896 | */ |
2897 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
91ebecc7 | 2898 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
2899 | error = xfs_trans_reserve(tp, |
2900 | resblks, | |
2901 | XFS_WRITE_LOG_RES(mp), | |
2902 | 0, | |
2903 | XFS_TRANS_PERM_LOG_RES, | |
2904 | XFS_WRITE_LOG_COUNT); | |
2905 | ||
2906 | /* | |
2907 | * check for running out of space | |
2908 | */ | |
2909 | if (error) { | |
2910 | /* | |
2911 | * Free the transaction structure. | |
2912 | */ | |
2913 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
2914 | xfs_trans_cancel(tp, 0); | |
2915 | break; | |
2916 | } | |
2917 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
2918 | error = xfs_trans_reserve_quota(tp, mp, |
2919 | ip->i_udquot, ip->i_gdquot, | |
2920 | resblks, 0, XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
2921 | if (error) |
2922 | goto error1; | |
2923 | ||
2924 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2925 | xfs_trans_ihold(tp, ip); | |
2926 | ||
2927 | /* | |
2928 | * issue the bunmapi() call to free the blocks | |
2929 | */ | |
9d87c319 | 2930 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 2931 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
1da177e4 | 2932 | endoffset_fsb - startoffset_fsb, |
3e57ecf6 | 2933 | 0, 2, &firstfsb, &free_list, NULL, &done); |
1da177e4 LT |
2934 | if (error) { |
2935 | goto error0; | |
2936 | } | |
2937 | ||
2938 | /* | |
2939 | * complete the transaction | |
2940 | */ | |
f7c99b6f | 2941 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2942 | if (error) { |
2943 | goto error0; | |
2944 | } | |
2945 | ||
1c72bf90 | 2946 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2947 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2948 | } | |
2949 | ||
2950 | out_unlock_iolock: | |
2951 | if (need_iolock) | |
2952 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
2953 | return error; | |
2954 | ||
2955 | error0: | |
2956 | xfs_bmap_cancel(&free_list); | |
2957 | error1: | |
2958 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
2959 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : | |
2960 | XFS_ILOCK_EXCL); | |
2961 | return error; | |
2962 | } | |
2963 | ||
2964 | /* | |
2965 | * xfs_change_file_space() | |
2966 | * This routine allocates or frees disk space for the given file. | |
2967 | * The user specified parameters are checked for alignment and size | |
2968 | * limitations. | |
2969 | * | |
2970 | * RETURNS: | |
2971 | * 0 on success | |
2972 | * errno on error | |
2973 | * | |
2974 | */ | |
2975 | int | |
2976 | xfs_change_file_space( | |
993386c1 | 2977 | xfs_inode_t *ip, |
1da177e4 LT |
2978 | int cmd, |
2979 | xfs_flock64_t *bf, | |
2980 | xfs_off_t offset, | |
1da177e4 LT |
2981 | int attr_flags) |
2982 | { | |
993386c1 | 2983 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
2984 | int clrprealloc; |
2985 | int error; | |
2986 | xfs_fsize_t fsize; | |
1da177e4 LT |
2987 | int setprealloc; |
2988 | xfs_off_t startoffset; | |
2989 | xfs_off_t llen; | |
2990 | xfs_trans_t *tp; | |
0f285c8a | 2991 | struct iattr iattr; |
1da177e4 | 2992 | |
cf441eeb | 2993 | xfs_itrace_entry(ip); |
1da177e4 | 2994 | |
993386c1 | 2995 | if (!S_ISREG(ip->i_d.di_mode)) |
1da177e4 LT |
2996 | return XFS_ERROR(EINVAL); |
2997 | ||
1da177e4 LT |
2998 | switch (bf->l_whence) { |
2999 | case 0: /*SEEK_SET*/ | |
3000 | break; | |
3001 | case 1: /*SEEK_CUR*/ | |
3002 | bf->l_start += offset; | |
3003 | break; | |
3004 | case 2: /*SEEK_END*/ | |
ba87ea69 | 3005 | bf->l_start += ip->i_size; |
1da177e4 LT |
3006 | break; |
3007 | default: | |
3008 | return XFS_ERROR(EINVAL); | |
3009 | } | |
3010 | ||
3011 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; | |
3012 | ||
3013 | if ( (bf->l_start < 0) | |
3014 | || (bf->l_start > XFS_MAXIOFFSET(mp)) | |
3015 | || (bf->l_start + llen < 0) | |
3016 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) | |
3017 | return XFS_ERROR(EINVAL); | |
3018 | ||
3019 | bf->l_whence = 0; | |
3020 | ||
3021 | startoffset = bf->l_start; | |
ba87ea69 | 3022 | fsize = ip->i_size; |
1da177e4 LT |
3023 | |
3024 | /* | |
3025 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve | |
3026 | * file space. | |
3027 | * These calls do NOT zero the data space allocated to the file, | |
3028 | * nor do they change the file size. | |
3029 | * | |
3030 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file | |
3031 | * space. | |
3032 | * These calls cause the new file data to be zeroed and the file | |
3033 | * size to be changed. | |
3034 | */ | |
3035 | setprealloc = clrprealloc = 0; | |
3036 | ||
3037 | switch (cmd) { | |
3038 | case XFS_IOC_RESVSP: | |
3039 | case XFS_IOC_RESVSP64: | |
3040 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, | |
3041 | 1, attr_flags); | |
3042 | if (error) | |
3043 | return error; | |
3044 | setprealloc = 1; | |
3045 | break; | |
3046 | ||
3047 | case XFS_IOC_UNRESVSP: | |
3048 | case XFS_IOC_UNRESVSP64: | |
3049 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, | |
3050 | attr_flags))) | |
3051 | return error; | |
3052 | break; | |
3053 | ||
3054 | case XFS_IOC_ALLOCSP: | |
3055 | case XFS_IOC_ALLOCSP64: | |
3056 | case XFS_IOC_FREESP: | |
3057 | case XFS_IOC_FREESP64: | |
3058 | if (startoffset > fsize) { | |
3059 | error = xfs_alloc_file_space(ip, fsize, | |
3060 | startoffset - fsize, 0, attr_flags); | |
3061 | if (error) | |
3062 | break; | |
3063 | } | |
3064 | ||
0f285c8a CH |
3065 | iattr.ia_valid = ATTR_SIZE; |
3066 | iattr.ia_size = startoffset; | |
1da177e4 | 3067 | |
ea5a3dc8 | 3068 | error = xfs_setattr(ip, &iattr, attr_flags); |
1da177e4 LT |
3069 | |
3070 | if (error) | |
3071 | return error; | |
3072 | ||
3073 | clrprealloc = 1; | |
3074 | break; | |
3075 | ||
3076 | default: | |
3077 | ASSERT(0); | |
3078 | return XFS_ERROR(EINVAL); | |
3079 | } | |
3080 | ||
3081 | /* | |
3082 | * update the inode timestamp, mode, and prealloc flag bits | |
3083 | */ | |
3084 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
3085 | ||
3086 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), | |
3087 | 0, 0, 0))) { | |
3088 | /* ASSERT(0); */ | |
3089 | xfs_trans_cancel(tp, 0); | |
3090 | return error; | |
3091 | } | |
3092 | ||
3093 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3094 | ||
3095 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
3096 | xfs_trans_ihold(tp, ip); | |
3097 | ||
0f285c8a | 3098 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
1da177e4 LT |
3099 | ip->i_d.di_mode &= ~S_ISUID; |
3100 | ||
3101 | /* | |
3102 | * Note that we don't have to worry about mandatory | |
3103 | * file locking being disabled here because we only | |
3104 | * clear the S_ISGID bit if the Group execute bit is | |
3105 | * on, but if it was on then mandatory locking wouldn't | |
3106 | * have been enabled. | |
3107 | */ | |
3108 | if (ip->i_d.di_mode & S_IXGRP) | |
3109 | ip->i_d.di_mode &= ~S_ISGID; | |
3110 | ||
3111 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
3112 | } | |
3113 | if (setprealloc) | |
3114 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; | |
3115 | else if (clrprealloc) | |
3116 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; | |
3117 | ||
3118 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
3119 | xfs_trans_set_sync(tp); | |
3120 | ||
1c72bf90 | 3121 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
3122 | |
3123 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3124 | ||
3125 | return error; | |
3126 | } |