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, |
c32676ee DC |
259 | XFS_B_ASYNC, FI_NONE); |
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; |
f538d4da | 600 | int log_flushed = 0, changed = 1; |
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 LT |
629 | */ |
630 | ||
631 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
632 | ||
633 | if (xfs_ipincount(ip)) { | |
978b7237 DC |
634 | error = _xfs_log_force(ip->i_mount, (xfs_lsn_t)0, |
635 | XFS_LOG_FORCE | XFS_LOG_SYNC, | |
f538d4da CH |
636 | &log_flushed); |
637 | } else { | |
638 | /* | |
978b7237 DC |
639 | * If the inode is not pinned and nothing has changed |
640 | * we don't need to flush the cache. | |
f538d4da CH |
641 | */ |
642 | changed = 0; | |
1da177e4 | 643 | } |
1da177e4 LT |
644 | } else { |
645 | /* | |
978b7237 DC |
646 | * Kick off a transaction to log the inode core to get the |
647 | * updates. The sync transaction will also force the log. | |
1da177e4 LT |
648 | */ |
649 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
650 | tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS); | |
978b7237 DC |
651 | error = xfs_trans_reserve(tp, 0, |
652 | XFS_FSYNC_TS_LOG_RES(ip->i_mount), 0, 0, 0); | |
653 | if (error) { | |
1da177e4 LT |
654 | xfs_trans_cancel(tp, 0); |
655 | return error; | |
656 | } | |
657 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
658 | ||
659 | /* | |
978b7237 DC |
660 | * Note - it's possible that we might have pushed ourselves out |
661 | * of the way during trans_reserve which would flush the inode. | |
662 | * But there's no guarantee that the inode buffer has actually | |
663 | * gone out yet (it's delwri). Plus the buffer could be pinned | |
664 | * anyway if it's part of an inode in another recent | |
665 | * transaction. So we play it safe and fire off the | |
666 | * transaction anyway. | |
1da177e4 LT |
667 | */ |
668 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
669 | xfs_trans_ihold(tp, ip); | |
670 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
978b7237 | 671 | xfs_trans_set_sync(tp); |
1c72bf90 | 672 | error = _xfs_trans_commit(tp, 0, &log_flushed); |
1da177e4 LT |
673 | |
674 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
675 | } | |
f538d4da CH |
676 | |
677 | if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) { | |
678 | /* | |
679 | * If the log write didn't issue an ordered tag we need | |
680 | * to flush the disk cache for the data device now. | |
681 | */ | |
682 | if (!log_flushed) | |
683 | xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp); | |
684 | ||
685 | /* | |
686 | * If this inode is on the RT dev we need to flush that | |
c41564b5 | 687 | * cache as well. |
f538d4da | 688 | */ |
71ddabb9 | 689 | if (XFS_IS_REALTIME_INODE(ip)) |
f538d4da CH |
690 | xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp); |
691 | } | |
692 | ||
1da177e4 LT |
693 | return error; |
694 | } | |
695 | ||
c56c9631 CH |
696 | /* |
697 | * Flags for xfs_free_eofblocks | |
698 | */ | |
699 | #define XFS_FREE_EOF_TRYLOCK (1<<0) | |
700 | ||
1da177e4 | 701 | /* |
92dfe8d2 DC |
702 | * This is called by xfs_inactive to free any blocks beyond eof |
703 | * when the link count isn't zero and by xfs_dm_punch_hole() when | |
704 | * punching a hole to EOF. | |
1da177e4 | 705 | */ |
d96f8f89 | 706 | STATIC int |
92dfe8d2 | 707 | xfs_free_eofblocks( |
1da177e4 | 708 | xfs_mount_t *mp, |
92dfe8d2 DC |
709 | xfs_inode_t *ip, |
710 | int flags) | |
1da177e4 LT |
711 | { |
712 | xfs_trans_t *tp; | |
713 | int error; | |
714 | xfs_fileoff_t end_fsb; | |
715 | xfs_fileoff_t last_fsb; | |
716 | xfs_filblks_t map_len; | |
717 | int nimaps; | |
718 | xfs_bmbt_irec_t imap; | |
719 | ||
720 | /* | |
721 | * Figure out if there are any blocks beyond the end | |
722 | * of the file. If not, then there is nothing to do. | |
723 | */ | |
ba87ea69 | 724 | end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_size)); |
1da177e4 LT |
725 | last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
726 | map_len = last_fsb - end_fsb; | |
727 | if (map_len <= 0) | |
014c2544 | 728 | return 0; |
1da177e4 LT |
729 | |
730 | nimaps = 1; | |
731 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
541d7d3c | 732 | error = xfs_bmapi(NULL, ip, end_fsb, map_len, 0, |
3e57ecf6 | 733 | NULL, 0, &imap, &nimaps, NULL, NULL); |
1da177e4 LT |
734 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
735 | ||
736 | if (!error && (nimaps != 0) && | |
68bdb6ea YL |
737 | (imap.br_startblock != HOLESTARTBLOCK || |
738 | ip->i_delayed_blks)) { | |
1da177e4 LT |
739 | /* |
740 | * Attach the dquots to the inode up front. | |
741 | */ | |
7d095257 CH |
742 | error = xfs_qm_dqattach(ip, 0); |
743 | if (error) | |
014c2544 | 744 | return error; |
1da177e4 LT |
745 | |
746 | /* | |
747 | * There are blocks after the end of file. | |
748 | * Free them up now by truncating the file to | |
749 | * its current size. | |
750 | */ | |
751 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
752 | ||
753 | /* | |
754 | * Do the xfs_itruncate_start() call before | |
755 | * reserving any log space because | |
756 | * itruncate_start will call into the buffer | |
757 | * cache and we can't | |
758 | * do that within a transaction. | |
759 | */ | |
c56c9631 CH |
760 | if (flags & XFS_FREE_EOF_TRYLOCK) { |
761 | if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { | |
762 | xfs_trans_cancel(tp, 0); | |
763 | return 0; | |
764 | } | |
765 | } else { | |
92dfe8d2 | 766 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
c56c9631 | 767 | } |
d3cf2094 | 768 | error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, |
ba87ea69 | 769 | ip->i_size); |
d3cf2094 | 770 | if (error) { |
87ae3c24 | 771 | xfs_trans_cancel(tp, 0); |
c56c9631 | 772 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
d3cf2094 LM |
773 | return error; |
774 | } | |
1da177e4 LT |
775 | |
776 | error = xfs_trans_reserve(tp, 0, | |
777 | XFS_ITRUNCATE_LOG_RES(mp), | |
778 | 0, XFS_TRANS_PERM_LOG_RES, | |
779 | XFS_ITRUNCATE_LOG_COUNT); | |
780 | if (error) { | |
781 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
782 | xfs_trans_cancel(tp, 0); | |
783 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 784 | return error; |
1da177e4 LT |
785 | } |
786 | ||
787 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
788 | xfs_trans_ijoin(tp, ip, | |
789 | XFS_IOLOCK_EXCL | | |
790 | XFS_ILOCK_EXCL); | |
791 | xfs_trans_ihold(tp, ip); | |
792 | ||
793 | error = xfs_itruncate_finish(&tp, ip, | |
ba87ea69 | 794 | ip->i_size, |
1da177e4 LT |
795 | XFS_DATA_FORK, |
796 | 0); | |
797 | /* | |
798 | * If we get an error at this point we | |
799 | * simply don't bother truncating the file. | |
800 | */ | |
801 | if (error) { | |
802 | xfs_trans_cancel(tp, | |
803 | (XFS_TRANS_RELEASE_LOG_RES | | |
804 | XFS_TRANS_ABORT)); | |
805 | } else { | |
806 | error = xfs_trans_commit(tp, | |
1c72bf90 | 807 | XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 808 | } |
c56c9631 | 809 | xfs_iunlock(ip, XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL); |
1da177e4 | 810 | } |
014c2544 | 811 | return error; |
1da177e4 LT |
812 | } |
813 | ||
814 | /* | |
815 | * Free a symlink that has blocks associated with it. | |
816 | */ | |
817 | STATIC int | |
818 | xfs_inactive_symlink_rmt( | |
819 | xfs_inode_t *ip, | |
820 | xfs_trans_t **tpp) | |
821 | { | |
822 | xfs_buf_t *bp; | |
823 | int committed; | |
824 | int done; | |
825 | int error; | |
826 | xfs_fsblock_t first_block; | |
827 | xfs_bmap_free_t free_list; | |
828 | int i; | |
829 | xfs_mount_t *mp; | |
830 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
831 | int nmaps; | |
832 | xfs_trans_t *ntp; | |
833 | int size; | |
834 | xfs_trans_t *tp; | |
835 | ||
836 | tp = *tpp; | |
837 | mp = ip->i_mount; | |
838 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); | |
839 | /* | |
840 | * We're freeing a symlink that has some | |
841 | * blocks allocated to it. Free the | |
842 | * blocks here. We know that we've got | |
843 | * either 1 or 2 extents and that we can | |
844 | * free them all in one bunmapi call. | |
845 | */ | |
846 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
847 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
848 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
849 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
850 | xfs_trans_cancel(tp, 0); | |
851 | *tpp = NULL; | |
852 | return error; | |
853 | } | |
854 | /* | |
855 | * Lock the inode, fix the size, and join it to the transaction. | |
856 | * Hold it so in the normal path, we still have it locked for | |
857 | * the second transaction. In the error paths we need it | |
858 | * held so the cancel won't rele it, see below. | |
859 | */ | |
860 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
861 | size = (int)ip->i_d.di_size; | |
862 | ip->i_d.di_size = 0; | |
863 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
864 | xfs_trans_ihold(tp, ip); | |
865 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
866 | /* | |
867 | * Find the block(s) so we can inval and unmap them. | |
868 | */ | |
869 | done = 0; | |
9d87c319 | 870 | xfs_bmap_init(&free_list, &first_block); |
e8c96f8c | 871 | nmaps = ARRAY_SIZE(mval); |
1da177e4 LT |
872 | if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size), |
873 | XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps, | |
3e57ecf6 | 874 | &free_list, NULL))) |
1da177e4 LT |
875 | goto error0; |
876 | /* | |
877 | * Invalidate the block(s). | |
878 | */ | |
879 | for (i = 0; i < nmaps; i++) { | |
880 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
881 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
882 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
883 | xfs_trans_binval(tp, bp); | |
884 | } | |
885 | /* | |
886 | * Unmap the dead block(s) to the free_list. | |
887 | */ | |
888 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, | |
3e57ecf6 | 889 | &first_block, &free_list, NULL, &done))) |
1da177e4 LT |
890 | goto error1; |
891 | ASSERT(done); | |
892 | /* | |
893 | * Commit the first transaction. This logs the EFI and the inode. | |
894 | */ | |
f7c99b6f | 895 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
1da177e4 LT |
896 | goto error1; |
897 | /* | |
898 | * The transaction must have been committed, since there were | |
899 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
900 | * The new tp has the extent freeing and EFDs. | |
901 | */ | |
902 | ASSERT(committed); | |
903 | /* | |
904 | * The first xact was committed, so add the inode to the new one. | |
905 | * Mark it dirty so it will be logged and moved forward in the log as | |
906 | * part of every commit. | |
907 | */ | |
908 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
909 | xfs_trans_ihold(tp, ip); | |
910 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
911 | /* | |
912 | * Get a new, empty transaction to return to our caller. | |
913 | */ | |
914 | ntp = xfs_trans_dup(tp); | |
915 | /* | |
c41564b5 | 916 | * Commit the transaction containing extent freeing and EFDs. |
1da177e4 LT |
917 | * If we get an error on the commit here or on the reserve below, |
918 | * we need to unlock the inode since the new transaction doesn't | |
919 | * have the inode attached. | |
920 | */ | |
1c72bf90 | 921 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
922 | tp = ntp; |
923 | if (error) { | |
924 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
925 | goto error0; | |
926 | } | |
cc09c0dc DC |
927 | /* |
928 | * transaction commit worked ok so we can drop the extra ticket | |
929 | * reference that we gained in xfs_trans_dup() | |
930 | */ | |
931 | xfs_log_ticket_put(tp->t_ticket); | |
932 | ||
1da177e4 LT |
933 | /* |
934 | * Remove the memory for extent descriptions (just bookkeeping). | |
935 | */ | |
936 | if (ip->i_df.if_bytes) | |
937 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
938 | ASSERT(ip->i_df.if_bytes == 0); | |
939 | /* | |
940 | * Put an itruncate log reservation in the new transaction | |
941 | * for our caller. | |
942 | */ | |
943 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
944 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
945 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
946 | goto error0; | |
947 | } | |
948 | /* | |
949 | * Return with the inode locked but not joined to the transaction. | |
950 | */ | |
951 | *tpp = tp; | |
952 | return 0; | |
953 | ||
954 | error1: | |
955 | xfs_bmap_cancel(&free_list); | |
956 | error0: | |
957 | /* | |
958 | * Have to come here with the inode locked and either | |
959 | * (held and in the transaction) or (not in the transaction). | |
960 | * If the inode isn't held then cancel would iput it, but | |
961 | * that's wrong since this is inactive and the vnode ref | |
962 | * count is 0 already. | |
963 | * Cancel won't do anything to the inode if held, but it still | |
964 | * needs to be locked until the cancel is done, if it was | |
965 | * joined to the transaction. | |
966 | */ | |
967 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
968 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
969 | *tpp = NULL; | |
970 | return error; | |
971 | ||
972 | } | |
973 | ||
974 | STATIC int | |
975 | xfs_inactive_symlink_local( | |
976 | xfs_inode_t *ip, | |
977 | xfs_trans_t **tpp) | |
978 | { | |
979 | int error; | |
980 | ||
981 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); | |
982 | /* | |
983 | * We're freeing a symlink which fit into | |
984 | * the inode. Just free the memory used | |
985 | * to hold the old symlink. | |
986 | */ | |
987 | error = xfs_trans_reserve(*tpp, 0, | |
988 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), | |
989 | 0, XFS_TRANS_PERM_LOG_RES, | |
990 | XFS_ITRUNCATE_LOG_COUNT); | |
991 | ||
992 | if (error) { | |
993 | xfs_trans_cancel(*tpp, 0); | |
994 | *tpp = NULL; | |
014c2544 | 995 | return error; |
1da177e4 LT |
996 | } |
997 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
998 | ||
999 | /* | |
1000 | * Zero length symlinks _can_ exist. | |
1001 | */ | |
1002 | if (ip->i_df.if_bytes > 0) { | |
1003 | xfs_idata_realloc(ip, | |
1004 | -(ip->i_df.if_bytes), | |
1005 | XFS_DATA_FORK); | |
1006 | ASSERT(ip->i_df.if_bytes == 0); | |
1007 | } | |
014c2544 | 1008 | return 0; |
1da177e4 LT |
1009 | } |
1010 | ||
1da177e4 LT |
1011 | STATIC int |
1012 | xfs_inactive_attrs( | |
1013 | xfs_inode_t *ip, | |
1014 | xfs_trans_t **tpp) | |
1015 | { | |
1016 | xfs_trans_t *tp; | |
1017 | int error; | |
1018 | xfs_mount_t *mp; | |
1019 | ||
579aa9ca | 1020 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
1da177e4 LT |
1021 | tp = *tpp; |
1022 | mp = ip->i_mount; | |
1023 | ASSERT(ip->i_d.di_forkoff != 0); | |
e5720eec | 1024 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 1025 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
e5720eec DC |
1026 | if (error) |
1027 | goto error_unlock; | |
1da177e4 LT |
1028 | |
1029 | error = xfs_attr_inactive(ip); | |
e5720eec DC |
1030 | if (error) |
1031 | goto error_unlock; | |
1da177e4 LT |
1032 | |
1033 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1034 | error = xfs_trans_reserve(tp, 0, | |
1035 | XFS_IFREE_LOG_RES(mp), | |
1036 | 0, XFS_TRANS_PERM_LOG_RES, | |
1037 | XFS_INACTIVE_LOG_COUNT); | |
e5720eec DC |
1038 | if (error) |
1039 | goto error_cancel; | |
1da177e4 LT |
1040 | |
1041 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1042 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1043 | xfs_trans_ihold(tp, ip); | |
1044 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
1045 | ||
1046 | ASSERT(ip->i_d.di_anextents == 0); | |
1047 | ||
1048 | *tpp = tp; | |
014c2544 | 1049 | return 0; |
e5720eec DC |
1050 | |
1051 | error_cancel: | |
1052 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1053 | xfs_trans_cancel(tp, 0); | |
1054 | error_unlock: | |
1055 | *tpp = NULL; | |
1056 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1057 | return error; | |
1da177e4 LT |
1058 | } |
1059 | ||
993386c1 | 1060 | int |
1da177e4 | 1061 | xfs_release( |
993386c1 | 1062 | xfs_inode_t *ip) |
1da177e4 | 1063 | { |
993386c1 | 1064 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
1065 | int error; |
1066 | ||
42173f68 | 1067 | if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) |
1da177e4 | 1068 | return 0; |
1da177e4 LT |
1069 | |
1070 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 1071 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
1072 | return 0; |
1073 | ||
2a82b8be | 1074 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
b3aea4ed CH |
1075 | int truncated; |
1076 | ||
2a82b8be DC |
1077 | /* |
1078 | * If we are using filestreams, and we have an unlinked | |
1079 | * file that we are processing the last close on, then nothing | |
1080 | * will be able to reopen and write to this file. Purge this | |
1081 | * inode from the filestreams cache so that it doesn't delay | |
1082 | * teardown of the inode. | |
1083 | */ | |
1084 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) | |
1085 | xfs_filestream_deassociate(ip); | |
1086 | ||
fbf3ce8d CH |
1087 | /* |
1088 | * If we previously truncated this file and removed old data | |
1089 | * in the process, we want to initiate "early" writeout on | |
1090 | * the last close. This is an attempt to combat the notorious | |
1091 | * NULL files problem which is particularly noticable from a | |
1092 | * truncate down, buffered (re-)write (delalloc), followed by | |
1093 | * a crash. What we are effectively doing here is | |
1094 | * significantly reducing the time window where we'd otherwise | |
1095 | * be exposed to that problem. | |
1096 | */ | |
09262b43 | 1097 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
df80c933 | 1098 | if (truncated && VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) |
739bfb2a | 1099 | xfs_flush_pages(ip, 0, -1, XFS_B_ASYNC, FI_NONE); |
fbf3ce8d CH |
1100 | } |
1101 | ||
1da177e4 LT |
1102 | if (ip->i_d.di_nlink != 0) { |
1103 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
df80c933 | 1104 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
68bdb6ea | 1105 | ip->i_delayed_blks > 0)) && |
1da177e4 | 1106 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && |
dd9f438e NS |
1107 | (!(ip->i_d.di_flags & |
1108 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { | |
c56c9631 CH |
1109 | |
1110 | /* | |
1111 | * If we can't get the iolock just skip truncating | |
1112 | * the blocks past EOF because we could deadlock | |
1113 | * with the mmap_sem otherwise. We'll get another | |
1114 | * chance to drop them once the last reference to | |
1115 | * the inode is dropped, so we'll never leak blocks | |
1116 | * permanently. | |
1117 | */ | |
1118 | error = xfs_free_eofblocks(mp, ip, | |
1119 | XFS_FREE_EOF_TRYLOCK); | |
92dfe8d2 | 1120 | if (error) |
014c2544 | 1121 | return error; |
1da177e4 LT |
1122 | } |
1123 | } | |
1124 | ||
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | /* | |
1129 | * xfs_inactive | |
1130 | * | |
1131 | * This is called when the vnode reference count for the vnode | |
1132 | * goes to zero. If the file has been unlinked, then it must | |
1133 | * now be truncated. Also, we clear all of the read-ahead state | |
1134 | * kept for the inode here since the file is now closed. | |
1135 | */ | |
993386c1 | 1136 | int |
1da177e4 | 1137 | xfs_inactive( |
993386c1 | 1138 | xfs_inode_t *ip) |
1da177e4 | 1139 | { |
67fcaa73 | 1140 | xfs_bmap_free_t free_list; |
1da177e4 LT |
1141 | xfs_fsblock_t first_block; |
1142 | int committed; | |
1143 | xfs_trans_t *tp; | |
1144 | xfs_mount_t *mp; | |
1145 | int error; | |
1146 | int truncate; | |
1147 | ||
cf441eeb | 1148 | xfs_itrace_entry(ip); |
1da177e4 | 1149 | |
1da177e4 LT |
1150 | /* |
1151 | * If the inode is already free, then there can be nothing | |
1152 | * to clean up here. | |
1153 | */ | |
cb4c8cc1 | 1154 | if (ip->i_d.di_mode == 0 || is_bad_inode(VFS_I(ip))) { |
1da177e4 LT |
1155 | ASSERT(ip->i_df.if_real_bytes == 0); |
1156 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
1157 | return VN_INACTIVE_CACHE; | |
1158 | } | |
1159 | ||
1160 | /* | |
1161 | * Only do a truncate if it's a regular file with | |
1162 | * some actual space in it. It's OK to look at the | |
1163 | * inode's fields without the lock because we're the | |
1164 | * only one with a reference to the inode. | |
1165 | */ | |
1166 | truncate = ((ip->i_d.di_nlink == 0) && | |
ba87ea69 LM |
1167 | ((ip->i_d.di_size != 0) || (ip->i_size != 0) || |
1168 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && | |
1da177e4 LT |
1169 | ((ip->i_d.di_mode & S_IFMT) == S_IFREG)); |
1170 | ||
1171 | mp = ip->i_mount; | |
1172 | ||
bc4ac74a CH |
1173 | if (ip->i_d.di_nlink == 0 && DM_EVENT_ENABLED(ip, DM_EVENT_DESTROY)) |
1174 | XFS_SEND_DESTROY(mp, ip, DM_RIGHT_NULL); | |
1da177e4 LT |
1175 | |
1176 | error = 0; | |
1177 | ||
1178 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 1179 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
1180 | goto out; |
1181 | ||
1182 | if (ip->i_d.di_nlink != 0) { | |
1183 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
df80c933 | 1184 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
68bdb6ea | 1185 | ip->i_delayed_blks > 0)) && |
dd9f438e NS |
1186 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
1187 | (!(ip->i_d.di_flags & | |
1188 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || | |
1189 | (ip->i_delayed_blks != 0)))) { | |
c56c9631 | 1190 | error = xfs_free_eofblocks(mp, ip, 0); |
92dfe8d2 | 1191 | if (error) |
014c2544 | 1192 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1193 | } |
1194 | goto out; | |
1195 | } | |
1196 | ||
1197 | ASSERT(ip->i_d.di_nlink == 0); | |
1198 | ||
7d095257 CH |
1199 | error = xfs_qm_dqattach(ip, 0); |
1200 | if (error) | |
014c2544 | 1201 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1202 | |
1203 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1204 | if (truncate) { | |
1205 | /* | |
1206 | * Do the xfs_itruncate_start() call before | |
1207 | * reserving any log space because itruncate_start | |
1208 | * will call into the buffer cache and we can't | |
1209 | * do that within a transaction. | |
1210 | */ | |
1211 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
1212 | ||
d3cf2094 LM |
1213 | error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0); |
1214 | if (error) { | |
87ae3c24 | 1215 | xfs_trans_cancel(tp, 0); |
d3cf2094 LM |
1216 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
1217 | return VN_INACTIVE_CACHE; | |
1218 | } | |
1da177e4 LT |
1219 | |
1220 | error = xfs_trans_reserve(tp, 0, | |
1221 | XFS_ITRUNCATE_LOG_RES(mp), | |
1222 | 0, XFS_TRANS_PERM_LOG_RES, | |
1223 | XFS_ITRUNCATE_LOG_COUNT); | |
1224 | if (error) { | |
1225 | /* Don't call itruncate_cleanup */ | |
1226 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1227 | xfs_trans_cancel(tp, 0); | |
1228 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 1229 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1230 | } |
1231 | ||
1232 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1233 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1234 | xfs_trans_ihold(tp, ip); | |
1235 | ||
1236 | /* | |
1237 | * normally, we have to run xfs_itruncate_finish sync. | |
1238 | * But if filesystem is wsync and we're in the inactive | |
1239 | * path, then we know that nlink == 0, and that the | |
1240 | * xaction that made nlink == 0 is permanently committed | |
1241 | * since xfs_remove runs as a synchronous transaction. | |
1242 | */ | |
1243 | error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK, | |
1244 | (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0)); | |
1245 | ||
1246 | if (error) { | |
1247 | xfs_trans_cancel(tp, | |
1248 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
1249 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
014c2544 | 1250 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1251 | } |
1252 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) { | |
1253 | ||
1254 | /* | |
1255 | * If we get an error while cleaning up a | |
1256 | * symlink we bail out. | |
1257 | */ | |
1258 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? | |
1259 | xfs_inactive_symlink_rmt(ip, &tp) : | |
1260 | xfs_inactive_symlink_local(ip, &tp); | |
1261 | ||
1262 | if (error) { | |
1263 | ASSERT(tp == NULL); | |
014c2544 | 1264 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1265 | } |
1266 | ||
1267 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1268 | xfs_trans_ihold(tp, ip); | |
1269 | } else { | |
1270 | error = xfs_trans_reserve(tp, 0, | |
1271 | XFS_IFREE_LOG_RES(mp), | |
1272 | 0, XFS_TRANS_PERM_LOG_RES, | |
1273 | XFS_INACTIVE_LOG_COUNT); | |
1274 | if (error) { | |
1275 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1276 | xfs_trans_cancel(tp, 0); | |
014c2544 | 1277 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1278 | } |
1279 | ||
1280 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
1281 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1282 | xfs_trans_ihold(tp, ip); | |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | * If there are attributes associated with the file | |
1287 | * then blow them away now. The code calls a routine | |
1288 | * that recursively deconstructs the attribute fork. | |
1289 | * We need to just commit the current transaction | |
1290 | * because we can't use it for xfs_attr_inactive(). | |
1291 | */ | |
1292 | if (ip->i_d.di_anextents > 0) { | |
1293 | error = xfs_inactive_attrs(ip, &tp); | |
1294 | /* | |
1295 | * If we got an error, the transaction is already | |
1296 | * cancelled, and the inode is unlocked. Just get out. | |
1297 | */ | |
1298 | if (error) | |
014c2544 | 1299 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1300 | } else if (ip->i_afp) { |
1301 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * Free the inode. | |
1306 | */ | |
9d87c319 | 1307 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
1308 | error = xfs_ifree(tp, ip, &free_list); |
1309 | if (error) { | |
1310 | /* | |
1311 | * If we fail to free the inode, shut down. The cancel | |
1312 | * might do that, we need to make sure. Otherwise the | |
1313 | * inode might be lost for a long time or forever. | |
1314 | */ | |
1315 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1316 | cmn_err(CE_NOTE, | |
1317 | "xfs_inactive: xfs_ifree() returned an error = %d on %s", | |
1318 | error, mp->m_fsname); | |
7d04a335 | 1319 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
1320 | } |
1321 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
1322 | } else { | |
1323 | /* | |
1324 | * Credit the quota account(s). The inode is gone. | |
1325 | */ | |
7d095257 | 1326 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
1da177e4 LT |
1327 | |
1328 | /* | |
78e9da77 DC |
1329 | * Just ignore errors at this point. There is nothing we can |
1330 | * do except to try to keep going. Make sure it's not a silent | |
1331 | * error. | |
1da177e4 | 1332 | */ |
78e9da77 DC |
1333 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1334 | if (error) | |
1335 | xfs_fs_cmn_err(CE_NOTE, mp, "xfs_inactive: " | |
1336 | "xfs_bmap_finish() returned error %d", error); | |
1337 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
1338 | if (error) | |
1339 | xfs_fs_cmn_err(CE_NOTE, mp, "xfs_inactive: " | |
1340 | "xfs_trans_commit() returned error %d", error); | |
1da177e4 | 1341 | } |
7d095257 | 1342 | |
1da177e4 LT |
1343 | /* |
1344 | * Release the dquots held by inode, if any. | |
1345 | */ | |
7d095257 | 1346 | xfs_qm_dqdetach(ip); |
1da177e4 LT |
1347 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
1348 | ||
1349 | out: | |
1350 | return VN_INACTIVE_CACHE; | |
1351 | } | |
1352 | ||
384f3ced BN |
1353 | /* |
1354 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
1355 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
1356 | * ci_name->name will point to a the actual name (caller must free) or | |
1357 | * will be set to NULL if an exact match is found. | |
1358 | */ | |
993386c1 | 1359 | int |
1da177e4 | 1360 | xfs_lookup( |
993386c1 | 1361 | xfs_inode_t *dp, |
556b8b16 | 1362 | struct xfs_name *name, |
384f3ced BN |
1363 | xfs_inode_t **ipp, |
1364 | struct xfs_name *ci_name) | |
1da177e4 | 1365 | { |
eca450b7 | 1366 | xfs_ino_t inum; |
1da177e4 LT |
1367 | int error; |
1368 | uint lock_mode; | |
1da177e4 | 1369 | |
cf441eeb | 1370 | xfs_itrace_entry(dp); |
1da177e4 LT |
1371 | |
1372 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
1373 | return XFS_ERROR(EIO); | |
1374 | ||
1375 | lock_mode = xfs_ilock_map_shared(dp); | |
384f3ced | 1376 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
1da177e4 | 1377 | xfs_iunlock_map_shared(dp, lock_mode); |
eca450b7 CH |
1378 | |
1379 | if (error) | |
1380 | goto out; | |
1381 | ||
1382 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp, 0); | |
1383 | if (error) | |
384f3ced | 1384 | goto out_free_name; |
eca450b7 | 1385 | |
eca450b7 CH |
1386 | return 0; |
1387 | ||
384f3ced BN |
1388 | out_free_name: |
1389 | if (ci_name) | |
1390 | kmem_free(ci_name->name); | |
1391 | out: | |
eca450b7 | 1392 | *ipp = NULL; |
1da177e4 LT |
1393 | return error; |
1394 | } | |
1395 | ||
993386c1 | 1396 | int |
1da177e4 | 1397 | xfs_create( |
993386c1 | 1398 | xfs_inode_t *dp, |
556b8b16 | 1399 | struct xfs_name *name, |
3e5daf05 CH |
1400 | mode_t mode, |
1401 | xfs_dev_t rdev, | |
979ebab1 | 1402 | xfs_inode_t **ipp, |
1da177e4 LT |
1403 | cred_t *credp) |
1404 | { | |
517b5e8c CH |
1405 | int is_dir = S_ISDIR(mode); |
1406 | struct xfs_mount *mp = dp->i_mount; | |
1407 | struct xfs_inode *ip = NULL; | |
1408 | struct xfs_trans *tp = NULL; | |
556b8b16 | 1409 | int error; |
1da177e4 LT |
1410 | xfs_bmap_free_t free_list; |
1411 | xfs_fsblock_t first_block; | |
993386c1 | 1412 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1413 | uint cancel_flags; |
1414 | int committed; | |
1415 | xfs_prid_t prid; | |
517b5e8c CH |
1416 | struct xfs_dquot *udqp = NULL; |
1417 | struct xfs_dquot *gdqp = NULL; | |
1da177e4 | 1418 | uint resblks; |
517b5e8c CH |
1419 | uint log_res; |
1420 | uint log_count; | |
1da177e4 | 1421 | |
cf441eeb | 1422 | xfs_itrace_entry(dp); |
1da177e4 | 1423 | |
517b5e8c CH |
1424 | if (XFS_FORCED_SHUTDOWN(mp)) |
1425 | return XFS_ERROR(EIO); | |
1426 | ||
eb9df39d | 1427 | if (DM_EVENT_ENABLED(dp, DM_EVENT_CREATE)) { |
1da177e4 | 1428 | error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, |
bc4ac74a | 1429 | dp, DM_RIGHT_NULL, NULL, |
556b8b16 | 1430 | DM_RIGHT_NULL, name->name, NULL, |
3e5daf05 | 1431 | mode, 0, 0); |
1da177e4 LT |
1432 | |
1433 | if (error) | |
1434 | return error; | |
1da177e4 LT |
1435 | } |
1436 | ||
365ca83d NS |
1437 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
1438 | prid = dp->i_d.di_projid; | |
1da177e4 | 1439 | else |
517b5e8c | 1440 | prid = dfltprid; |
1da177e4 LT |
1441 | |
1442 | /* | |
1443 | * Make sure that we have allocated dquot(s) on disk. | |
1444 | */ | |
7d095257 | 1445 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
517b5e8c | 1446 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1da177e4 LT |
1447 | if (error) |
1448 | goto std_return; | |
1449 | ||
517b5e8c CH |
1450 | if (is_dir) { |
1451 | rdev = 0; | |
1452 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
1453 | log_res = XFS_MKDIR_LOG_RES(mp); | |
1454 | log_count = XFS_MKDIR_LOG_COUNT; | |
1455 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); | |
1456 | } else { | |
1457 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
1458 | log_res = XFS_CREATE_LOG_RES(mp); | |
1459 | log_count = XFS_CREATE_LOG_COUNT; | |
1460 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); | |
1461 | } | |
1da177e4 | 1462 | |
1da177e4 | 1463 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
517b5e8c | 1464 | |
1da177e4 LT |
1465 | /* |
1466 | * Initially assume that the file does not exist and | |
1467 | * reserve the resources for that case. If that is not | |
1468 | * the case we'll drop the one we have and get a more | |
1469 | * appropriate transaction later. | |
1470 | */ | |
517b5e8c CH |
1471 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
1472 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 | 1473 | if (error == ENOSPC) { |
153fec43 DC |
1474 | /* flush outstanding delalloc blocks and retry */ |
1475 | xfs_flush_inodes(dp); | |
4734d401 CH |
1476 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
1477 | XFS_TRANS_PERM_LOG_RES, log_count); | |
153fec43 DC |
1478 | } |
1479 | if (error == ENOSPC) { | |
1480 | /* No space at all so try a "no-allocation" reservation */ | |
1da177e4 | 1481 | resblks = 0; |
517b5e8c CH |
1482 | error = xfs_trans_reserve(tp, 0, log_res, 0, |
1483 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 LT |
1484 | } |
1485 | if (error) { | |
1486 | cancel_flags = 0; | |
517b5e8c | 1487 | goto out_trans_cancel; |
1da177e4 LT |
1488 | } |
1489 | ||
f7c66ce3 | 1490 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 1491 | unlock_dp_on_error = B_TRUE; |
1da177e4 | 1492 | |
517b5e8c CH |
1493 | /* |
1494 | * Check for directory link count overflow. | |
1495 | */ | |
1496 | if (is_dir && dp->i_d.di_nlink >= XFS_MAXLINK) { | |
1497 | error = XFS_ERROR(EMLINK); | |
1498 | goto out_trans_cancel; | |
1499 | } | |
1da177e4 | 1500 | |
517b5e8c | 1501 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
1502 | |
1503 | /* | |
1504 | * Reserve disk quota and the inode. | |
1505 | */ | |
7d095257 | 1506 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 | 1507 | if (error) |
517b5e8c | 1508 | goto out_trans_cancel; |
1da177e4 | 1509 | |
556b8b16 BN |
1510 | error = xfs_dir_canenter(tp, dp, name, resblks); |
1511 | if (error) | |
517b5e8c CH |
1512 | goto out_trans_cancel; |
1513 | ||
1514 | /* | |
1515 | * A newly created regular or special file just has one directory | |
1516 | * entry pointing to them, but a directory also the "." entry | |
1517 | * pointing to itself. | |
1518 | */ | |
1519 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, credp, | |
1520 | prid, resblks > 0, &ip, &committed); | |
1da177e4 LT |
1521 | if (error) { |
1522 | if (error == ENOSPC) | |
517b5e8c CH |
1523 | goto out_trans_cancel; |
1524 | goto out_trans_abort; | |
1da177e4 | 1525 | } |
1da177e4 LT |
1526 | |
1527 | /* | |
1528 | * At this point, we've gotten a newly allocated inode. | |
1529 | * It is locked (and joined to the transaction). | |
1530 | */ | |
579aa9ca | 1531 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
1532 | |
1533 | /* | |
993386c1 CH |
1534 | * Now we join the directory inode to the transaction. We do not do it |
1535 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
1536 | * (and release all the locks). An error from here on will result in | |
1537 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
1538 | * error path. | |
1da177e4 | 1539 | */ |
979ebab1 | 1540 | IHOLD(dp); |
1da177e4 | 1541 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 1542 | unlock_dp_on_error = B_FALSE; |
1da177e4 | 1543 | |
556b8b16 | 1544 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
f6c2d1fa NS |
1545 | &first_block, &free_list, resblks ? |
1546 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
1547 | if (error) { |
1548 | ASSERT(error != ENOSPC); | |
517b5e8c | 1549 | goto out_trans_abort; |
1da177e4 LT |
1550 | } |
1551 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1552 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1553 | ||
517b5e8c CH |
1554 | if (is_dir) { |
1555 | error = xfs_dir_init(tp, ip, dp); | |
1556 | if (error) | |
1557 | goto out_bmap_cancel; | |
1558 | ||
1559 | error = xfs_bumplink(tp, dp); | |
1560 | if (error) | |
1561 | goto out_bmap_cancel; | |
1562 | } | |
1563 | ||
1da177e4 LT |
1564 | /* |
1565 | * If this is a synchronous mount, make sure that the | |
1566 | * create transaction goes to disk before returning to | |
1567 | * the user. | |
1568 | */ | |
517b5e8c | 1569 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 1570 | xfs_trans_set_sync(tp); |
1da177e4 | 1571 | |
1da177e4 LT |
1572 | /* |
1573 | * Attach the dquot(s) to the inodes and modify them incore. | |
1574 | * These ids of the inode couldn't have changed since the new | |
1575 | * inode has been locked ever since it was created. | |
1576 | */ | |
7d095257 | 1577 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 LT |
1578 | |
1579 | /* | |
1580 | * xfs_trans_commit normally decrements the vnode ref count | |
1581 | * when it unlocks the inode. Since we want to return the | |
1582 | * vnode to the caller, we bump the vnode ref count now. | |
1583 | */ | |
1584 | IHOLD(ip); | |
1da177e4 | 1585 | |
f7c99b6f | 1586 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
517b5e8c CH |
1587 | if (error) |
1588 | goto out_abort_rele; | |
1da177e4 | 1589 | |
1c72bf90 | 1590 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1591 | if (error) { |
1592 | IRELE(ip); | |
517b5e8c | 1593 | goto out_dqrele; |
1da177e4 LT |
1594 | } |
1595 | ||
7d095257 CH |
1596 | xfs_qm_dqrele(udqp); |
1597 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1598 | |
979ebab1 | 1599 | *ipp = ip; |
1da177e4 LT |
1600 | |
1601 | /* Fallthrough to std_return with error = 0 */ | |
517b5e8c CH |
1602 | std_return: |
1603 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTCREATE)) { | |
1604 | XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, dp, DM_RIGHT_NULL, | |
1605 | ip, DM_RIGHT_NULL, name->name, NULL, mode, | |
1606 | error, 0); | |
1da177e4 | 1607 | } |
517b5e8c | 1608 | |
1da177e4 LT |
1609 | return error; |
1610 | ||
517b5e8c CH |
1611 | out_bmap_cancel: |
1612 | xfs_bmap_cancel(&free_list); | |
1613 | out_trans_abort: | |
1da177e4 | 1614 | cancel_flags |= XFS_TRANS_ABORT; |
517b5e8c CH |
1615 | out_trans_cancel: |
1616 | xfs_trans_cancel(tp, cancel_flags); | |
1617 | out_dqrele: | |
7d095257 CH |
1618 | xfs_qm_dqrele(udqp); |
1619 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 1620 | |
993386c1 CH |
1621 | if (unlock_dp_on_error) |
1622 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
1623 | ||
1da177e4 LT |
1624 | goto std_return; |
1625 | ||
517b5e8c | 1626 | out_abort_rele: |
1da177e4 LT |
1627 | /* |
1628 | * Wait until after the current transaction is aborted to | |
1629 | * release the inode. This prevents recursive transactions | |
1630 | * and deadlocks from xfs_inactive. | |
1631 | */ | |
517b5e8c | 1632 | xfs_bmap_cancel(&free_list); |
1da177e4 LT |
1633 | cancel_flags |= XFS_TRANS_ABORT; |
1634 | xfs_trans_cancel(tp, cancel_flags); | |
1635 | IRELE(ip); | |
517b5e8c CH |
1636 | unlock_dp_on_error = B_FALSE; |
1637 | goto out_dqrele; | |
1da177e4 LT |
1638 | } |
1639 | ||
1da177e4 LT |
1640 | #ifdef DEBUG |
1641 | int xfs_locked_n; | |
1642 | int xfs_small_retries; | |
1643 | int xfs_middle_retries; | |
1644 | int xfs_lots_retries; | |
1645 | int xfs_lock_delays; | |
1646 | #endif | |
1647 | ||
f7c66ce3 LM |
1648 | /* |
1649 | * Bump the subclass so xfs_lock_inodes() acquires each lock with | |
1650 | * a different value | |
1651 | */ | |
1652 | static inline int | |
1653 | xfs_lock_inumorder(int lock_mode, int subclass) | |
1654 | { | |
1655 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) | |
0f1145cc | 1656 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
f7c66ce3 | 1657 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
0f1145cc | 1658 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
f7c66ce3 LM |
1659 | |
1660 | return lock_mode; | |
1661 | } | |
1662 | ||
1da177e4 LT |
1663 | /* |
1664 | * The following routine will lock n inodes in exclusive mode. | |
1665 | * We assume the caller calls us with the inodes in i_ino order. | |
1666 | * | |
1667 | * We need to detect deadlock where an inode that we lock | |
1668 | * is in the AIL and we start waiting for another inode that is locked | |
1669 | * by a thread in a long running transaction (such as truncate). This can | |
1670 | * result in deadlock since the long running trans might need to wait | |
1671 | * for the inode we just locked in order to push the tail and free space | |
1672 | * in the log. | |
1673 | */ | |
1674 | void | |
1675 | xfs_lock_inodes( | |
1676 | xfs_inode_t **ips, | |
1677 | int inodes, | |
1da177e4 LT |
1678 | uint lock_mode) |
1679 | { | |
1680 | int attempts = 0, i, j, try_lock; | |
1681 | xfs_log_item_t *lp; | |
1682 | ||
1683 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ | |
1684 | ||
cfa853e4 CH |
1685 | try_lock = 0; |
1686 | i = 0; | |
1da177e4 LT |
1687 | |
1688 | again: | |
1689 | for (; i < inodes; i++) { | |
1690 | ASSERT(ips[i]); | |
1691 | ||
1692 | if (i && (ips[i] == ips[i-1])) /* Already locked */ | |
1693 | continue; | |
1694 | ||
1695 | /* | |
1696 | * If try_lock is not set yet, make sure all locked inodes | |
1697 | * are not in the AIL. | |
1698 | * If any are, set try_lock to be used later. | |
1699 | */ | |
1700 | ||
1701 | if (!try_lock) { | |
1702 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
1703 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
1704 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1705 | try_lock++; | |
1706 | } | |
1707 | } | |
1708 | } | |
1709 | ||
1710 | /* | |
1711 | * If any of the previous locks we have locked is in the AIL, | |
1712 | * we must TRY to get the second and subsequent locks. If | |
1713 | * we can't get any, we must release all we have | |
1714 | * and try again. | |
1715 | */ | |
1716 | ||
1717 | if (try_lock) { | |
1718 | /* try_lock must be 0 if i is 0. */ | |
1719 | /* | |
1720 | * try_lock means we have an inode locked | |
1721 | * that is in the AIL. | |
1722 | */ | |
1723 | ASSERT(i != 0); | |
f7c66ce3 | 1724 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
1da177e4 LT |
1725 | attempts++; |
1726 | ||
1727 | /* | |
1728 | * Unlock all previous guys and try again. | |
1729 | * xfs_iunlock will try to push the tail | |
1730 | * if the inode is in the AIL. | |
1731 | */ | |
1732 | ||
1733 | for(j = i - 1; j >= 0; j--) { | |
1734 | ||
1735 | /* | |
1736 | * Check to see if we've already | |
1737 | * unlocked this one. | |
1738 | * Not the first one going back, | |
1739 | * and the inode ptr is the same. | |
1740 | */ | |
1741 | if ((j != (i - 1)) && ips[j] == | |
1742 | ips[j+1]) | |
1743 | continue; | |
1744 | ||
1745 | xfs_iunlock(ips[j], lock_mode); | |
1746 | } | |
1747 | ||
1748 | if ((attempts % 5) == 0) { | |
1749 | delay(1); /* Don't just spin the CPU */ | |
1750 | #ifdef DEBUG | |
1751 | xfs_lock_delays++; | |
1752 | #endif | |
1753 | } | |
1754 | i = 0; | |
1755 | try_lock = 0; | |
1756 | goto again; | |
1757 | } | |
1758 | } else { | |
f7c66ce3 | 1759 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
1da177e4 LT |
1760 | } |
1761 | } | |
1762 | ||
1763 | #ifdef DEBUG | |
1764 | if (attempts) { | |
1765 | if (attempts < 5) xfs_small_retries++; | |
1766 | else if (attempts < 100) xfs_middle_retries++; | |
1767 | else xfs_lots_retries++; | |
1768 | } else { | |
1769 | xfs_locked_n++; | |
1770 | } | |
1771 | #endif | |
1772 | } | |
1773 | ||
f9114eba DC |
1774 | /* |
1775 | * xfs_lock_two_inodes() can only be used to lock one type of lock | |
1776 | * at a time - the iolock or the ilock, but not both at once. If | |
1777 | * we lock both at once, lockdep will report false positives saying | |
1778 | * we have violated locking orders. | |
1779 | */ | |
e1cccd91 CH |
1780 | void |
1781 | xfs_lock_two_inodes( | |
1782 | xfs_inode_t *ip0, | |
1783 | xfs_inode_t *ip1, | |
1784 | uint lock_mode) | |
1785 | { | |
1786 | xfs_inode_t *temp; | |
1787 | int attempts = 0; | |
1788 | xfs_log_item_t *lp; | |
1789 | ||
f9114eba DC |
1790 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
1791 | ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0); | |
e1cccd91 CH |
1792 | ASSERT(ip0->i_ino != ip1->i_ino); |
1793 | ||
1794 | if (ip0->i_ino > ip1->i_ino) { | |
1795 | temp = ip0; | |
1796 | ip0 = ip1; | |
1797 | ip1 = temp; | |
1798 | } | |
1799 | ||
1800 | again: | |
1801 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
1802 | ||
1803 | /* | |
1804 | * If the first lock we have locked is in the AIL, we must TRY to get | |
1805 | * the second lock. If we can't get it, we must release the first one | |
1806 | * and try again. | |
1807 | */ | |
1808 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
1809 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1810 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
1811 | xfs_iunlock(ip0, lock_mode); | |
1812 | if ((++attempts % 5) == 0) | |
1813 | delay(1); /* Don't just spin the CPU */ | |
1814 | goto again; | |
1815 | } | |
1816 | } else { | |
1817 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
1818 | } | |
1819 | } | |
1820 | ||
993386c1 | 1821 | int |
1da177e4 | 1822 | xfs_remove( |
993386c1 | 1823 | xfs_inode_t *dp, |
556b8b16 BN |
1824 | struct xfs_name *name, |
1825 | xfs_inode_t *ip) | |
1da177e4 | 1826 | { |
993386c1 | 1827 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1828 | xfs_trans_t *tp = NULL; |
8f112e3b | 1829 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
1da177e4 LT |
1830 | int error = 0; |
1831 | xfs_bmap_free_t free_list; | |
1832 | xfs_fsblock_t first_block; | |
1833 | int cancel_flags; | |
1834 | int committed; | |
1da177e4 LT |
1835 | int link_zero; |
1836 | uint resblks; | |
8f112e3b | 1837 | uint log_count; |
1da177e4 | 1838 | |
cf441eeb | 1839 | xfs_itrace_entry(dp); |
8f112e3b | 1840 | xfs_itrace_entry(ip); |
1da177e4 | 1841 | |
1da177e4 LT |
1842 | if (XFS_FORCED_SHUTDOWN(mp)) |
1843 | return XFS_ERROR(EIO); | |
1844 | ||
eb9df39d | 1845 | if (DM_EVENT_ENABLED(dp, DM_EVENT_REMOVE)) { |
556b8b16 BN |
1846 | error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dp, DM_RIGHT_NULL, |
1847 | NULL, DM_RIGHT_NULL, name->name, NULL, | |
1848 | ip->i_d.di_mode, 0, 0); | |
1da177e4 LT |
1849 | if (error) |
1850 | return error; | |
1851 | } | |
1852 | ||
7d095257 | 1853 | error = xfs_qm_dqattach(dp, 0); |
8f112e3b CH |
1854 | if (error) |
1855 | goto std_return; | |
1856 | ||
7d095257 | 1857 | error = xfs_qm_dqattach(ip, 0); |
8f112e3b | 1858 | if (error) |
1da177e4 | 1859 | goto std_return; |
1da177e4 | 1860 | |
8f112e3b CH |
1861 | if (is_dir) { |
1862 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); | |
1863 | log_count = XFS_DEFAULT_LOG_COUNT; | |
1864 | } else { | |
1865 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); | |
1866 | log_count = XFS_REMOVE_LOG_COUNT; | |
1867 | } | |
1da177e4 | 1868 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
8f112e3b | 1869 | |
1da177e4 LT |
1870 | /* |
1871 | * We try to get the real space reservation first, | |
1872 | * allowing for directory btree deletion(s) implying | |
1873 | * possible bmap insert(s). If we can't get the space | |
1874 | * reservation then we use 0 instead, and avoid the bmap | |
1875 | * btree insert(s) in the directory code by, if the bmap | |
1876 | * insert tries to happen, instead trimming the LAST | |
1877 | * block from the directory. | |
1878 | */ | |
1879 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
1880 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1881 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1882 | if (error == ENOSPC) { |
1883 | resblks = 0; | |
1884 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1885 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1886 | } |
1887 | if (error) { | |
1888 | ASSERT(error != ENOSPC); | |
8f112e3b CH |
1889 | cancel_flags = 0; |
1890 | goto out_trans_cancel; | |
1da177e4 LT |
1891 | } |
1892 | ||
e1cccd91 | 1893 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
1894 | |
1895 | /* | |
1896 | * At this point, we've gotten both the directory and the entry | |
1897 | * inodes locked. | |
1898 | */ | |
5df78e73 | 1899 | IHOLD(ip); |
1da177e4 | 1900 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
82dab941 CH |
1901 | |
1902 | IHOLD(dp); | |
1903 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
1da177e4 | 1904 | |
8f112e3b CH |
1905 | /* |
1906 | * If we're removing a directory perform some additional validation. | |
1907 | */ | |
1908 | if (is_dir) { | |
1909 | ASSERT(ip->i_d.di_nlink >= 2); | |
1910 | if (ip->i_d.di_nlink != 2) { | |
1911 | error = XFS_ERROR(ENOTEMPTY); | |
1912 | goto out_trans_cancel; | |
1913 | } | |
1914 | if (!xfs_dir_isempty(ip)) { | |
1915 | error = XFS_ERROR(ENOTEMPTY); | |
1916 | goto out_trans_cancel; | |
1917 | } | |
1918 | } | |
1919 | ||
9d87c319 | 1920 | xfs_bmap_init(&free_list, &first_block); |
556b8b16 | 1921 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
d4377d84 | 1922 | &first_block, &free_list, resblks); |
1da177e4 LT |
1923 | if (error) { |
1924 | ASSERT(error != ENOENT); | |
8f112e3b | 1925 | goto out_bmap_cancel; |
1da177e4 LT |
1926 | } |
1927 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1928 | ||
8f112e3b CH |
1929 | if (is_dir) { |
1930 | /* | |
1931 | * Drop the link from ip's "..". | |
1932 | */ | |
1933 | error = xfs_droplink(tp, dp); | |
1934 | if (error) | |
1935 | goto out_bmap_cancel; | |
1936 | ||
1937 | /* | |
2b7035fd | 1938 | * Drop the "." link from ip to self. |
8f112e3b CH |
1939 | */ |
1940 | error = xfs_droplink(tp, ip); | |
1941 | if (error) | |
1942 | goto out_bmap_cancel; | |
1943 | } else { | |
1944 | /* | |
1945 | * When removing a non-directory we need to log the parent | |
26c52951 DC |
1946 | * inode here. For a directory this is done implicitly |
1947 | * by the xfs_droplink call for the ".." entry. | |
8f112e3b CH |
1948 | */ |
1949 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1da177e4 LT |
1950 | } |
1951 | ||
8f112e3b | 1952 | /* |
2b7035fd | 1953 | * Drop the link from dp to ip. |
8f112e3b CH |
1954 | */ |
1955 | error = xfs_droplink(tp, ip); | |
1956 | if (error) | |
1957 | goto out_bmap_cancel; | |
1958 | ||
1959 | /* | |
1960 | * Determine if this is the last link while | |
1da177e4 LT |
1961 | * we are in the transaction. |
1962 | */ | |
8f112e3b | 1963 | link_zero = (ip->i_d.di_nlink == 0); |
1da177e4 | 1964 | |
1da177e4 LT |
1965 | /* |
1966 | * If this is a synchronous mount, make sure that the | |
1967 | * remove transaction goes to disk before returning to | |
1968 | * the user. | |
1969 | */ | |
8f112e3b | 1970 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 1971 | xfs_trans_set_sync(tp); |
1da177e4 | 1972 | |
f7c99b6f | 1973 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
8f112e3b CH |
1974 | if (error) |
1975 | goto out_bmap_cancel; | |
1da177e4 | 1976 | |
1c72bf90 | 1977 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
5df78e73 | 1978 | if (error) |
1da177e4 | 1979 | goto std_return; |
1da177e4 | 1980 | |
2a82b8be DC |
1981 | /* |
1982 | * If we are using filestreams, kill the stream association. | |
1983 | * If the file is still open it may get a new one but that | |
1984 | * will get killed on last close in xfs_close() so we don't | |
1985 | * have to worry about that. | |
1986 | */ | |
8f112e3b | 1987 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
2a82b8be DC |
1988 | xfs_filestream_deassociate(ip); |
1989 | ||
1da177e4 | 1990 | std_return: |
eb9df39d | 1991 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTREMOVE)) { |
8f112e3b CH |
1992 | XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE, dp, DM_RIGHT_NULL, |
1993 | NULL, DM_RIGHT_NULL, name->name, NULL, | |
1994 | ip->i_d.di_mode, error, 0); | |
1da177e4 | 1995 | } |
8f112e3b | 1996 | |
1da177e4 LT |
1997 | return error; |
1998 | ||
8f112e3b | 1999 | out_bmap_cancel: |
1da177e4 LT |
2000 | xfs_bmap_cancel(&free_list); |
2001 | cancel_flags |= XFS_TRANS_ABORT; | |
8f112e3b | 2002 | out_trans_cancel: |
1da177e4 LT |
2003 | xfs_trans_cancel(tp, cancel_flags); |
2004 | goto std_return; | |
1da177e4 LT |
2005 | } |
2006 | ||
993386c1 | 2007 | int |
1da177e4 | 2008 | xfs_link( |
993386c1 | 2009 | xfs_inode_t *tdp, |
a3da7896 | 2010 | xfs_inode_t *sip, |
556b8b16 | 2011 | struct xfs_name *target_name) |
1da177e4 | 2012 | { |
993386c1 | 2013 | xfs_mount_t *mp = tdp->i_mount; |
1da177e4 | 2014 | xfs_trans_t *tp; |
1da177e4 LT |
2015 | int error; |
2016 | xfs_bmap_free_t free_list; | |
2017 | xfs_fsblock_t first_block; | |
2018 | int cancel_flags; | |
2019 | int committed; | |
1da177e4 | 2020 | int resblks; |
1da177e4 | 2021 | |
cf441eeb | 2022 | xfs_itrace_entry(tdp); |
a3da7896 | 2023 | xfs_itrace_entry(sip); |
1da177e4 | 2024 | |
a3da7896 | 2025 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
1da177e4 | 2026 | |
1da177e4 LT |
2027 | if (XFS_FORCED_SHUTDOWN(mp)) |
2028 | return XFS_ERROR(EIO); | |
2029 | ||
eb9df39d | 2030 | if (DM_EVENT_ENABLED(tdp, DM_EVENT_LINK)) { |
1da177e4 | 2031 | error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK, |
bc4ac74a CH |
2032 | tdp, DM_RIGHT_NULL, |
2033 | sip, DM_RIGHT_NULL, | |
556b8b16 | 2034 | target_name->name, NULL, 0, 0, 0); |
1da177e4 LT |
2035 | if (error) |
2036 | return error; | |
2037 | } | |
2038 | ||
2039 | /* Return through std_return after this point. */ | |
2040 | ||
7d095257 | 2041 | error = xfs_qm_dqattach(sip, 0); |
cb3f35bb CH |
2042 | if (error) |
2043 | goto std_return; | |
2044 | ||
7d095257 | 2045 | error = xfs_qm_dqattach(tdp, 0); |
1da177e4 LT |
2046 | if (error) |
2047 | goto std_return; | |
2048 | ||
2049 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); | |
2050 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 2051 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
1da177e4 LT |
2052 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
2053 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
2054 | if (error == ENOSPC) { | |
2055 | resblks = 0; | |
2056 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, | |
2057 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
2058 | } | |
2059 | if (error) { | |
2060 | cancel_flags = 0; | |
2061 | goto error_return; | |
2062 | } | |
2063 | ||
e1cccd91 | 2064 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
1da177e4 LT |
2065 | |
2066 | /* | |
2067 | * Increment vnode ref counts since xfs_trans_commit & | |
2068 | * xfs_trans_cancel will both unlock the inodes and | |
2069 | * decrement the associated ref counts. | |
2070 | */ | |
a3da7896 CH |
2071 | IHOLD(sip); |
2072 | IHOLD(tdp); | |
1da177e4 LT |
2073 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); |
2074 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); | |
2075 | ||
2076 | /* | |
2077 | * If the source has too many links, we can't make any more to it. | |
2078 | */ | |
2079 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { | |
2080 | error = XFS_ERROR(EMLINK); | |
2081 | goto error_return; | |
2082 | } | |
2083 | ||
365ca83d NS |
2084 | /* |
2085 | * If we are using project inheritance, we only allow hard link | |
2086 | * creation in our tree when the project IDs are the same; else | |
2087 | * the tree quota mechanism could be circumvented. | |
2088 | */ | |
2089 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
2090 | (tdp->i_d.di_projid != sip->i_d.di_projid))) { | |
b1ecdda9 | 2091 | error = XFS_ERROR(EXDEV); |
365ca83d NS |
2092 | goto error_return; |
2093 | } | |
2094 | ||
556b8b16 BN |
2095 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
2096 | if (error) | |
1da177e4 LT |
2097 | goto error_return; |
2098 | ||
9d87c319 | 2099 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 | 2100 | |
556b8b16 BN |
2101 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
2102 | &first_block, &free_list, resblks); | |
1da177e4 LT |
2103 | if (error) |
2104 | goto abort_return; | |
2105 | xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1da177e4 LT |
2106 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
2107 | ||
2108 | error = xfs_bumplink(tp, sip); | |
b71d300c | 2109 | if (error) |
1da177e4 | 2110 | goto abort_return; |
1da177e4 LT |
2111 | |
2112 | /* | |
2113 | * If this is a synchronous mount, make sure that the | |
2114 | * link transaction goes to disk before returning to | |
2115 | * the user. | |
2116 | */ | |
2117 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2118 | xfs_trans_set_sync(tp); | |
2119 | } | |
2120 | ||
f7c99b6f | 2121 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
2122 | if (error) { |
2123 | xfs_bmap_cancel(&free_list); | |
2124 | goto abort_return; | |
2125 | } | |
2126 | ||
1c72bf90 | 2127 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
b71d300c | 2128 | if (error) |
1da177e4 | 2129 | goto std_return; |
1da177e4 LT |
2130 | |
2131 | /* Fall through to std_return with error = 0. */ | |
2132 | std_return: | |
eb9df39d | 2133 | if (DM_EVENT_ENABLED(sip, DM_EVENT_POSTLINK)) { |
1da177e4 | 2134 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK, |
bc4ac74a CH |
2135 | tdp, DM_RIGHT_NULL, |
2136 | sip, DM_RIGHT_NULL, | |
556b8b16 | 2137 | target_name->name, NULL, 0, error, 0); |
1da177e4 LT |
2138 | } |
2139 | return error; | |
2140 | ||
2141 | abort_return: | |
2142 | cancel_flags |= XFS_TRANS_ABORT; | |
2143 | /* FALLTHROUGH */ | |
014c2544 | 2144 | |
1da177e4 LT |
2145 | error_return: |
2146 | xfs_trans_cancel(tp, cancel_flags); | |
1da177e4 LT |
2147 | goto std_return; |
2148 | } | |
b71d300c | 2149 | |
993386c1 | 2150 | int |
1da177e4 | 2151 | xfs_symlink( |
993386c1 | 2152 | xfs_inode_t *dp, |
556b8b16 BN |
2153 | struct xfs_name *link_name, |
2154 | const char *target_path, | |
3e5daf05 | 2155 | mode_t mode, |
3937be5b | 2156 | xfs_inode_t **ipp, |
1da177e4 LT |
2157 | cred_t *credp) |
2158 | { | |
993386c1 | 2159 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 2160 | xfs_trans_t *tp; |
1da177e4 LT |
2161 | xfs_inode_t *ip; |
2162 | int error; | |
2163 | int pathlen; | |
2164 | xfs_bmap_free_t free_list; | |
2165 | xfs_fsblock_t first_block; | |
993386c1 | 2166 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
2167 | uint cancel_flags; |
2168 | int committed; | |
2169 | xfs_fileoff_t first_fsb; | |
2170 | xfs_filblks_t fs_blocks; | |
2171 | int nmaps; | |
2172 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
2173 | xfs_daddr_t d; | |
556b8b16 | 2174 | const char *cur_chunk; |
1da177e4 LT |
2175 | int byte_cnt; |
2176 | int n; | |
2177 | xfs_buf_t *bp; | |
2178 | xfs_prid_t prid; | |
2179 | struct xfs_dquot *udqp, *gdqp; | |
2180 | uint resblks; | |
1da177e4 | 2181 | |
3937be5b | 2182 | *ipp = NULL; |
1da177e4 LT |
2183 | error = 0; |
2184 | ip = NULL; | |
2185 | tp = NULL; | |
2186 | ||
cf441eeb | 2187 | xfs_itrace_entry(dp); |
1da177e4 LT |
2188 | |
2189 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2190 | return XFS_ERROR(EIO); | |
2191 | ||
1da177e4 LT |
2192 | /* |
2193 | * Check component lengths of the target path name. | |
2194 | */ | |
2195 | pathlen = strlen(target_path); | |
2196 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
2197 | return XFS_ERROR(ENAMETOOLONG); | |
1da177e4 | 2198 | |
eb9df39d | 2199 | if (DM_EVENT_ENABLED(dp, DM_EVENT_SYMLINK)) { |
bc4ac74a | 2200 | error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dp, |
1da177e4 | 2201 | DM_RIGHT_NULL, NULL, DM_RIGHT_NULL, |
556b8b16 | 2202 | link_name->name, target_path, 0, 0, 0); |
1da177e4 LT |
2203 | if (error) |
2204 | return error; | |
2205 | } | |
2206 | ||
2207 | /* Return through std_return after this point. */ | |
2208 | ||
2209 | udqp = gdqp = NULL; | |
365ca83d NS |
2210 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
2211 | prid = dp->i_d.di_projid; | |
1da177e4 LT |
2212 | else |
2213 | prid = (xfs_prid_t)dfltprid; | |
2214 | ||
2215 | /* | |
2216 | * Make sure that we have allocated dquot(s) on disk. | |
2217 | */ | |
7d095257 | 2218 | error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, |
1da177e4 LT |
2219 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
2220 | if (error) | |
2221 | goto std_return; | |
2222 | ||
2223 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
2224 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
2225 | /* | |
2226 | * The symlink will fit into the inode data fork? | |
2227 | * There can't be any attributes so we get the whole variable part. | |
2228 | */ | |
2229 | if (pathlen <= XFS_LITINO(mp)) | |
2230 | fs_blocks = 0; | |
2231 | else | |
2232 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); | |
556b8b16 | 2233 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
1da177e4 LT |
2234 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
2235 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
2236 | if (error == ENOSPC && fs_blocks == 0) { | |
2237 | resblks = 0; | |
2238 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, | |
2239 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
2240 | } | |
2241 | if (error) { | |
2242 | cancel_flags = 0; | |
1da177e4 LT |
2243 | goto error_return; |
2244 | } | |
2245 | ||
f7c66ce3 | 2246 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 2247 | unlock_dp_on_error = B_TRUE; |
1da177e4 LT |
2248 | |
2249 | /* | |
2250 | * Check whether the directory allows new symlinks or not. | |
2251 | */ | |
2252 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
2253 | error = XFS_ERROR(EPERM); | |
2254 | goto error_return; | |
2255 | } | |
2256 | ||
2257 | /* | |
2258 | * Reserve disk quota : blocks and inode. | |
2259 | */ | |
7d095257 | 2260 | error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0); |
1da177e4 LT |
2261 | if (error) |
2262 | goto error_return; | |
2263 | ||
2264 | /* | |
2265 | * Check for ability to enter directory entry, if no space reserved. | |
2266 | */ | |
556b8b16 BN |
2267 | error = xfs_dir_canenter(tp, dp, link_name, resblks); |
2268 | if (error) | |
1da177e4 LT |
2269 | goto error_return; |
2270 | /* | |
2271 | * Initialize the bmap freelist prior to calling either | |
2272 | * bmapi or the directory create code. | |
2273 | */ | |
9d87c319 | 2274 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
2275 | |
2276 | /* | |
2277 | * Allocate an inode for the symlink. | |
2278 | */ | |
3e5daf05 | 2279 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), |
1da177e4 LT |
2280 | 1, 0, credp, prid, resblks > 0, &ip, NULL); |
2281 | if (error) { | |
2282 | if (error == ENOSPC) | |
2283 | goto error_return; | |
2284 | goto error1; | |
2285 | } | |
1da177e4 | 2286 | |
993386c1 CH |
2287 | /* |
2288 | * An error after we've joined dp to the transaction will result in the | |
2289 | * transaction cancel unlocking dp so don't do it explicitly in the | |
2290 | * error path. | |
2291 | */ | |
3937be5b | 2292 | IHOLD(dp); |
1da177e4 | 2293 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 2294 | unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
2295 | |
2296 | /* | |
2297 | * Also attach the dquot(s) to it, if applicable. | |
2298 | */ | |
7d095257 | 2299 | xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); |
1da177e4 LT |
2300 | |
2301 | if (resblks) | |
2302 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
2303 | /* | |
2304 | * If the symlink will fit into the inode, write it inline. | |
2305 | */ | |
2306 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
2307 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
2308 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
2309 | ip->i_d.di_size = pathlen; | |
2310 | ||
2311 | /* | |
2312 | * The inode was initially created in extent format. | |
2313 | */ | |
2314 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
2315 | ip->i_df.if_flags |= XFS_IFINLINE; | |
2316 | ||
2317 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
2318 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
2319 | ||
2320 | } else { | |
2321 | first_fsb = 0; | |
2322 | nmaps = SYMLINK_MAPS; | |
2323 | ||
2324 | error = xfs_bmapi(tp, ip, first_fsb, fs_blocks, | |
2325 | XFS_BMAPI_WRITE | XFS_BMAPI_METADATA, | |
2326 | &first_block, resblks, mval, &nmaps, | |
3e57ecf6 | 2327 | &free_list, NULL); |
1da177e4 LT |
2328 | if (error) { |
2329 | goto error1; | |
2330 | } | |
2331 | ||
2332 | if (resblks) | |
2333 | resblks -= fs_blocks; | |
2334 | ip->i_d.di_size = pathlen; | |
2335 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
2336 | ||
2337 | cur_chunk = target_path; | |
2338 | for (n = 0; n < nmaps; n++) { | |
2339 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
2340 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
2341 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
2342 | BTOBB(byte_cnt), 0); | |
2343 | ASSERT(bp && !XFS_BUF_GETERROR(bp)); | |
2344 | if (pathlen < byte_cnt) { | |
2345 | byte_cnt = pathlen; | |
2346 | } | |
2347 | pathlen -= byte_cnt; | |
2348 | ||
2349 | memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt); | |
2350 | cur_chunk += byte_cnt; | |
2351 | ||
2352 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | /* | |
2357 | * Create the directory entry for the symlink. | |
2358 | */ | |
556b8b16 BN |
2359 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, |
2360 | &first_block, &free_list, resblks); | |
f6c2d1fa | 2361 | if (error) |
1da177e4 | 2362 | goto error1; |
1da177e4 LT |
2363 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
2364 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
2365 | ||
1da177e4 LT |
2366 | /* |
2367 | * If this is a synchronous mount, make sure that the | |
2368 | * symlink transaction goes to disk before returning to | |
2369 | * the user. | |
2370 | */ | |
2371 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2372 | xfs_trans_set_sync(tp); | |
2373 | } | |
2374 | ||
2375 | /* | |
2376 | * xfs_trans_commit normally decrements the vnode ref count | |
2377 | * when it unlocks the inode. Since we want to return the | |
2378 | * vnode to the caller, we bump the vnode ref count now. | |
2379 | */ | |
2380 | IHOLD(ip); | |
2381 | ||
f7c99b6f | 2382 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2383 | if (error) { |
2384 | goto error2; | |
2385 | } | |
1c72bf90 | 2386 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
7d095257 CH |
2387 | xfs_qm_dqrele(udqp); |
2388 | xfs_qm_dqrele(gdqp); | |
1da177e4 LT |
2389 | |
2390 | /* Fall through to std_return with error = 0 or errno from | |
2391 | * xfs_trans_commit */ | |
2392 | std_return: | |
993386c1 | 2393 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTSYMLINK)) { |
1da177e4 | 2394 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK, |
bc4ac74a CH |
2395 | dp, DM_RIGHT_NULL, |
2396 | error ? NULL : ip, | |
556b8b16 BN |
2397 | DM_RIGHT_NULL, link_name->name, |
2398 | target_path, 0, error, 0); | |
1da177e4 LT |
2399 | } |
2400 | ||
3937be5b CH |
2401 | if (!error) |
2402 | *ipp = ip; | |
1da177e4 LT |
2403 | return error; |
2404 | ||
2405 | error2: | |
2406 | IRELE(ip); | |
2407 | error1: | |
2408 | xfs_bmap_cancel(&free_list); | |
2409 | cancel_flags |= XFS_TRANS_ABORT; | |
2410 | error_return: | |
2411 | xfs_trans_cancel(tp, cancel_flags); | |
7d095257 CH |
2412 | xfs_qm_dqrele(udqp); |
2413 | xfs_qm_dqrele(gdqp); | |
1da177e4 | 2414 | |
993386c1 | 2415 | if (unlock_dp_on_error) |
1da177e4 | 2416 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
1da177e4 LT |
2417 | |
2418 | goto std_return; | |
2419 | } | |
2420 | ||
1da177e4 | 2421 | int |
993386c1 CH |
2422 | xfs_set_dmattrs( |
2423 | xfs_inode_t *ip, | |
1da177e4 | 2424 | u_int evmask, |
993386c1 | 2425 | u_int16_t state) |
1da177e4 | 2426 | { |
993386c1 | 2427 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 2428 | xfs_trans_t *tp; |
1da177e4 LT |
2429 | int error; |
2430 | ||
2431 | if (!capable(CAP_SYS_ADMIN)) | |
2432 | return XFS_ERROR(EPERM); | |
2433 | ||
1da177e4 LT |
2434 | if (XFS_FORCED_SHUTDOWN(mp)) |
2435 | return XFS_ERROR(EIO); | |
2436 | ||
2437 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
2438 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
2439 | if (error) { | |
2440 | xfs_trans_cancel(tp, 0); | |
2441 | return error; | |
2442 | } | |
2443 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2444 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2445 | ||
613d7043 CH |
2446 | ip->i_d.di_dmevmask = evmask; |
2447 | ip->i_d.di_dmstate = state; | |
1da177e4 LT |
2448 | |
2449 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
2450 | IHOLD(ip); | |
1c72bf90 | 2451 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
2452 | |
2453 | return error; | |
2454 | } | |
2455 | ||
1da177e4 LT |
2456 | /* |
2457 | * xfs_alloc_file_space() | |
2458 | * This routine allocates disk space for the given file. | |
2459 | * | |
2460 | * If alloc_type == 0, this request is for an ALLOCSP type | |
2461 | * request which will change the file size. In this case, no | |
2462 | * DMAPI event will be generated by the call. A TRUNCATE event | |
2463 | * will be generated later by xfs_setattr. | |
2464 | * | |
2465 | * If alloc_type != 0, this request is for a RESVSP type | |
2466 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the | |
2467 | * lower block boundary byte address is less than the file's | |
2468 | * length. | |
2469 | * | |
2470 | * RETURNS: | |
2471 | * 0 on success | |
2472 | * errno on error | |
2473 | * | |
2474 | */ | |
ba0f32d4 | 2475 | STATIC int |
1da177e4 LT |
2476 | xfs_alloc_file_space( |
2477 | xfs_inode_t *ip, | |
2478 | xfs_off_t offset, | |
2479 | xfs_off_t len, | |
2480 | int alloc_type, | |
2481 | int attr_flags) | |
2482 | { | |
dd9f438e NS |
2483 | xfs_mount_t *mp = ip->i_mount; |
2484 | xfs_off_t count; | |
1da177e4 LT |
2485 | xfs_filblks_t allocated_fsb; |
2486 | xfs_filblks_t allocatesize_fsb; | |
dd9f438e NS |
2487 | xfs_extlen_t extsz, temp; |
2488 | xfs_fileoff_t startoffset_fsb; | |
1da177e4 | 2489 | xfs_fsblock_t firstfsb; |
dd9f438e NS |
2490 | int nimaps; |
2491 | int bmapi_flag; | |
2492 | int quota_flag; | |
1da177e4 | 2493 | int rt; |
1da177e4 | 2494 | xfs_trans_t *tp; |
dd9f438e NS |
2495 | xfs_bmbt_irec_t imaps[1], *imapp; |
2496 | xfs_bmap_free_t free_list; | |
2497 | uint qblocks, resblks, resrtextents; | |
2498 | int committed; | |
2499 | int error; | |
1da177e4 | 2500 | |
cf441eeb | 2501 | xfs_itrace_entry(ip); |
1da177e4 LT |
2502 | |
2503 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2504 | return XFS_ERROR(EIO); | |
2505 | ||
7d095257 CH |
2506 | error = xfs_qm_dqattach(ip, 0); |
2507 | if (error) | |
1da177e4 LT |
2508 | return error; |
2509 | ||
2510 | if (len <= 0) | |
2511 | return XFS_ERROR(EINVAL); | |
2512 | ||
957d0ebe DC |
2513 | rt = XFS_IS_REALTIME_INODE(ip); |
2514 | extsz = xfs_get_extsz_hint(ip); | |
2515 | ||
1da177e4 | 2516 | count = len; |
1da177e4 | 2517 | imapp = &imaps[0]; |
dd9f438e NS |
2518 | nimaps = 1; |
2519 | bmapi_flag = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0); | |
1da177e4 LT |
2520 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
2521 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); | |
2522 | ||
2523 | /* Generate a DMAPI event if needed. */ | |
ba87ea69 | 2524 | if (alloc_type != 0 && offset < ip->i_size && |
0f285c8a | 2525 | (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 2526 | DM_EVENT_ENABLED(ip, DM_EVENT_WRITE)) { |
1da177e4 LT |
2527 | xfs_off_t end_dmi_offset; |
2528 | ||
2529 | end_dmi_offset = offset+len; | |
ba87ea69 LM |
2530 | if (end_dmi_offset > ip->i_size) |
2531 | end_dmi_offset = ip->i_size; | |
bc4ac74a CH |
2532 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, ip, offset, |
2533 | end_dmi_offset - offset, 0, NULL); | |
1da177e4 | 2534 | if (error) |
014c2544 | 2535 | return error; |
1da177e4 LT |
2536 | } |
2537 | ||
2538 | /* | |
dd9f438e | 2539 | * Allocate file space until done or until there is an error |
1da177e4 LT |
2540 | */ |
2541 | retry: | |
2542 | while (allocatesize_fsb && !error) { | |
dd9f438e NS |
2543 | xfs_fileoff_t s, e; |
2544 | ||
1da177e4 | 2545 | /* |
3ddb8fa9 | 2546 | * Determine space reservations for data/realtime. |
1da177e4 | 2547 | */ |
dd9f438e | 2548 | if (unlikely(extsz)) { |
1da177e4 | 2549 | s = startoffset_fsb; |
dd9f438e NS |
2550 | do_div(s, extsz); |
2551 | s *= extsz; | |
2552 | e = startoffset_fsb + allocatesize_fsb; | |
2553 | if ((temp = do_mod(startoffset_fsb, extsz))) | |
2554 | e += temp; | |
2555 | if ((temp = do_mod(e, extsz))) | |
2556 | e += extsz - temp; | |
2557 | } else { | |
2558 | s = 0; | |
2559 | e = allocatesize_fsb; | |
2560 | } | |
2561 | ||
2562 | if (unlikely(rt)) { | |
2563 | resrtextents = qblocks = (uint)(e - s); | |
2564 | resrtextents /= mp->m_sb.sb_rextsize; | |
2565 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
2566 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
1da177e4 | 2567 | } else { |
dd9f438e NS |
2568 | resrtextents = 0; |
2569 | resblks = qblocks = \ | |
2570 | XFS_DIOSTRAT_SPACE_RES(mp, (uint)(e - s)); | |
2571 | quota_flag = XFS_QMOPT_RES_REGBLKS; | |
1da177e4 LT |
2572 | } |
2573 | ||
2574 | /* | |
dd9f438e | 2575 | * Allocate and setup the transaction. |
1da177e4 LT |
2576 | */ |
2577 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
dd9f438e NS |
2578 | error = xfs_trans_reserve(tp, resblks, |
2579 | XFS_WRITE_LOG_RES(mp), resrtextents, | |
1da177e4 LT |
2580 | XFS_TRANS_PERM_LOG_RES, |
2581 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 2582 | /* |
dd9f438e | 2583 | * Check for running out of space |
1da177e4 LT |
2584 | */ |
2585 | if (error) { | |
2586 | /* | |
2587 | * Free the transaction structure. | |
2588 | */ | |
2589 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
2590 | xfs_trans_cancel(tp, 0); | |
2591 | break; | |
2592 | } | |
2593 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
2594 | error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks, |
2595 | 0, quota_flag); | |
1da177e4 LT |
2596 | if (error) |
2597 | goto error1; | |
2598 | ||
2599 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2600 | xfs_trans_ihold(tp, ip); | |
2601 | ||
2602 | /* | |
dd9f438e | 2603 | * Issue the xfs_bmapi() call to allocate the blocks |
1da177e4 | 2604 | */ |
9d87c319 | 2605 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 2606 | error = xfs_bmapi(tp, ip, startoffset_fsb, |
dd9f438e NS |
2607 | allocatesize_fsb, bmapi_flag, |
2608 | &firstfsb, 0, imapp, &nimaps, | |
3e57ecf6 | 2609 | &free_list, NULL); |
1da177e4 LT |
2610 | if (error) { |
2611 | goto error0; | |
2612 | } | |
2613 | ||
2614 | /* | |
dd9f438e | 2615 | * Complete the transaction |
1da177e4 | 2616 | */ |
f7c99b6f | 2617 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2618 | if (error) { |
2619 | goto error0; | |
2620 | } | |
2621 | ||
1c72bf90 | 2622 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2623 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2624 | if (error) { | |
2625 | break; | |
2626 | } | |
2627 | ||
2628 | allocated_fsb = imapp->br_blockcount; | |
2629 | ||
dd9f438e | 2630 | if (nimaps == 0) { |
1da177e4 LT |
2631 | error = XFS_ERROR(ENOSPC); |
2632 | break; | |
2633 | } | |
2634 | ||
2635 | startoffset_fsb += allocated_fsb; | |
2636 | allocatesize_fsb -= allocated_fsb; | |
2637 | } | |
2638 | dmapi_enospc_check: | |
0f285c8a | 2639 | if (error == ENOSPC && (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 2640 | DM_EVENT_ENABLED(ip, DM_EVENT_NOSPACE)) { |
1da177e4 | 2641 | error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE, |
bc4ac74a CH |
2642 | ip, DM_RIGHT_NULL, |
2643 | ip, DM_RIGHT_NULL, | |
1da177e4 LT |
2644 | NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */ |
2645 | if (error == 0) | |
2646 | goto retry; /* Maybe DMAPI app. has made space */ | |
2647 | /* else fall through with error from XFS_SEND_DATA */ | |
2648 | } | |
2649 | ||
2650 | return error; | |
2651 | ||
dd9f438e | 2652 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 2653 | xfs_bmap_cancel(&free_list); |
7d095257 | 2654 | xfs_trans_unreserve_quota_nblks(tp, ip, qblocks, 0, quota_flag); |
dd9f438e NS |
2655 | |
2656 | error1: /* Just cancel transaction */ | |
1da177e4 LT |
2657 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
2658 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
2659 | goto dmapi_enospc_check; | |
2660 | } | |
2661 | ||
2662 | /* | |
2663 | * Zero file bytes between startoff and endoff inclusive. | |
2664 | * The iolock is held exclusive and no blocks are buffered. | |
2fd6f6ec LM |
2665 | * |
2666 | * This function is used by xfs_free_file_space() to zero | |
2667 | * partial blocks when the range to free is not block aligned. | |
2668 | * When unreserving space with boundaries that are not block | |
2669 | * aligned we round up the start and round down the end | |
2670 | * boundaries and then use this function to zero the parts of | |
2671 | * the blocks that got dropped during the rounding. | |
1da177e4 LT |
2672 | */ |
2673 | STATIC int | |
2674 | xfs_zero_remaining_bytes( | |
2675 | xfs_inode_t *ip, | |
2676 | xfs_off_t startoff, | |
2677 | xfs_off_t endoff) | |
2678 | { | |
2679 | xfs_bmbt_irec_t imap; | |
2680 | xfs_fileoff_t offset_fsb; | |
2681 | xfs_off_t lastoffset; | |
2682 | xfs_off_t offset; | |
2683 | xfs_buf_t *bp; | |
2684 | xfs_mount_t *mp = ip->i_mount; | |
2685 | int nimap; | |
2686 | int error = 0; | |
2687 | ||
2fd6f6ec LM |
2688 | /* |
2689 | * Avoid doing I/O beyond eof - it's not necessary | |
2690 | * since nothing can read beyond eof. The space will | |
2691 | * be zeroed when the file is extended anyway. | |
2692 | */ | |
2693 | if (startoff >= ip->i_size) | |
2694 | return 0; | |
2695 | ||
2696 | if (endoff > ip->i_size) | |
2697 | endoff = ip->i_size; | |
2698 | ||
1da177e4 | 2699 | bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize, |
71ddabb9 | 2700 | XFS_IS_REALTIME_INODE(ip) ? |
1da177e4 | 2701 | mp->m_rtdev_targp : mp->m_ddev_targp); |
c6422617 LM |
2702 | if (!bp) |
2703 | return XFS_ERROR(ENOMEM); | |
1da177e4 LT |
2704 | |
2705 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { | |
2706 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
2707 | nimap = 1; | |
541d7d3c | 2708 | error = xfs_bmapi(NULL, ip, offset_fsb, 1, 0, |
3e57ecf6 | 2709 | NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
2710 | if (error || nimap < 1) |
2711 | break; | |
2712 | ASSERT(imap.br_blockcount >= 1); | |
2713 | ASSERT(imap.br_startoff == offset_fsb); | |
2714 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; | |
2715 | if (lastoffset > endoff) | |
2716 | lastoffset = endoff; | |
2717 | if (imap.br_startblock == HOLESTARTBLOCK) | |
2718 | continue; | |
2719 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2720 | if (imap.br_state == XFS_EXT_UNWRITTEN) | |
2721 | continue; | |
2722 | XFS_BUF_UNDONE(bp); | |
2723 | XFS_BUF_UNWRITE(bp); | |
2724 | XFS_BUF_READ(bp); | |
9d87c319 | 2725 | XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock)); |
1da177e4 | 2726 | xfsbdstrat(mp, bp); |
d64e31a2 DC |
2727 | error = xfs_iowait(bp); |
2728 | if (error) { | |
1da177e4 LT |
2729 | xfs_ioerror_alert("xfs_zero_remaining_bytes(read)", |
2730 | mp, bp, XFS_BUF_ADDR(bp)); | |
2731 | break; | |
2732 | } | |
2733 | memset(XFS_BUF_PTR(bp) + | |
2734 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), | |
2735 | 0, lastoffset - offset + 1); | |
2736 | XFS_BUF_UNDONE(bp); | |
2737 | XFS_BUF_UNREAD(bp); | |
2738 | XFS_BUF_WRITE(bp); | |
2739 | xfsbdstrat(mp, bp); | |
d64e31a2 DC |
2740 | error = xfs_iowait(bp); |
2741 | if (error) { | |
1da177e4 LT |
2742 | xfs_ioerror_alert("xfs_zero_remaining_bytes(write)", |
2743 | mp, bp, XFS_BUF_ADDR(bp)); | |
2744 | break; | |
2745 | } | |
2746 | } | |
2747 | xfs_buf_free(bp); | |
2748 | return error; | |
2749 | } | |
2750 | ||
2751 | /* | |
2752 | * xfs_free_file_space() | |
2753 | * This routine frees disk space for the given file. | |
2754 | * | |
2755 | * This routine is only called by xfs_change_file_space | |
2756 | * for an UNRESVSP type call. | |
2757 | * | |
2758 | * RETURNS: | |
2759 | * 0 on success | |
2760 | * errno on error | |
2761 | * | |
2762 | */ | |
2763 | STATIC int | |
2764 | xfs_free_file_space( | |
2765 | xfs_inode_t *ip, | |
2766 | xfs_off_t offset, | |
2767 | xfs_off_t len, | |
2768 | int attr_flags) | |
2769 | { | |
2770 | int committed; | |
2771 | int done; | |
2772 | xfs_off_t end_dmi_offset; | |
2773 | xfs_fileoff_t endoffset_fsb; | |
2774 | int error; | |
2775 | xfs_fsblock_t firstfsb; | |
2776 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
2777 | xfs_bmbt_irec_t imap; |
2778 | xfs_off_t ioffset; | |
2779 | xfs_extlen_t mod=0; | |
2780 | xfs_mount_t *mp; | |
2781 | int nimap; | |
2782 | uint resblks; | |
673cdf5c | 2783 | uint rounding; |
1da177e4 LT |
2784 | int rt; |
2785 | xfs_fileoff_t startoffset_fsb; | |
2786 | xfs_trans_t *tp; | |
5fcbab35 | 2787 | int need_iolock = 1; |
1da177e4 | 2788 | |
1da177e4 LT |
2789 | mp = ip->i_mount; |
2790 | ||
cf441eeb | 2791 | xfs_itrace_entry(ip); |
bd5a876a | 2792 | |
7d095257 CH |
2793 | error = xfs_qm_dqattach(ip, 0); |
2794 | if (error) | |
1da177e4 LT |
2795 | return error; |
2796 | ||
2797 | error = 0; | |
2798 | if (len <= 0) /* if nothing being freed */ | |
2799 | return error; | |
71ddabb9 | 2800 | rt = XFS_IS_REALTIME_INODE(ip); |
1da177e4 LT |
2801 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
2802 | end_dmi_offset = offset + len; | |
2803 | endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset); | |
2804 | ||
0f285c8a | 2805 | if (offset < ip->i_size && (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 2806 | DM_EVENT_ENABLED(ip, DM_EVENT_WRITE)) { |
ba87ea69 LM |
2807 | if (end_dmi_offset > ip->i_size) |
2808 | end_dmi_offset = ip->i_size; | |
bc4ac74a | 2809 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, ip, |
1da177e4 LT |
2810 | offset, end_dmi_offset - offset, |
2811 | AT_DELAY_FLAG(attr_flags), NULL); | |
2812 | if (error) | |
014c2544 | 2813 | return error; |
1da177e4 LT |
2814 | } |
2815 | ||
0f285c8a | 2816 | if (attr_flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 2817 | need_iolock = 0; |
9fa8046f | 2818 | if (need_iolock) { |
1da177e4 | 2819 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
25e41b3d CH |
2820 | /* wait for the completion of any pending DIOs */ |
2821 | xfs_ioend_wait(ip); | |
9fa8046f | 2822 | } |
5fcbab35 | 2823 | |
e6a4b37f | 2824 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
1da177e4 | 2825 | ioffset = offset & ~(rounding - 1); |
bd5a876a | 2826 | |
df80c933 | 2827 | if (VN_CACHED(VFS_I(ip)) != 0) { |
e6a4b37f | 2828 | error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); |
d3cf2094 LM |
2829 | if (error) |
2830 | goto out_unlock_iolock; | |
bd5a876a CH |
2831 | } |
2832 | ||
1da177e4 LT |
2833 | /* |
2834 | * Need to zero the stuff we're not freeing, on disk. | |
9da096fd | 2835 | * If it's a realtime file & can't use unwritten extents then we |
1da177e4 LT |
2836 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
2837 | * will take care of it for us. | |
2838 | */ | |
62118709 | 2839 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 | 2840 | nimap = 1; |
541d7d3c | 2841 | error = xfs_bmapi(NULL, ip, startoffset_fsb, |
3e57ecf6 | 2842 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
2843 | if (error) |
2844 | goto out_unlock_iolock; | |
2845 | ASSERT(nimap == 0 || nimap == 1); | |
2846 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2847 | xfs_daddr_t block; | |
2848 | ||
2849 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2850 | block = imap.br_startblock; | |
2851 | mod = do_div(block, mp->m_sb.sb_rextsize); | |
2852 | if (mod) | |
2853 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; | |
2854 | } | |
2855 | nimap = 1; | |
541d7d3c | 2856 | error = xfs_bmapi(NULL, ip, endoffset_fsb - 1, |
3e57ecf6 | 2857 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
2858 | if (error) |
2859 | goto out_unlock_iolock; | |
2860 | ASSERT(nimap == 0 || nimap == 1); | |
2861 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2862 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2863 | mod++; | |
2864 | if (mod && (mod != mp->m_sb.sb_rextsize)) | |
2865 | endoffset_fsb -= mod; | |
2866 | } | |
2867 | } | |
2868 | if ((done = (endoffset_fsb <= startoffset_fsb))) | |
2869 | /* | |
2870 | * One contiguous piece to clear | |
2871 | */ | |
2872 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); | |
2873 | else { | |
2874 | /* | |
2875 | * Some full blocks, possibly two pieces to clear | |
2876 | */ | |
2877 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) | |
2878 | error = xfs_zero_remaining_bytes(ip, offset, | |
2879 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); | |
2880 | if (!error && | |
2881 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) | |
2882 | error = xfs_zero_remaining_bytes(ip, | |
2883 | XFS_FSB_TO_B(mp, endoffset_fsb), | |
2884 | offset + len - 1); | |
2885 | } | |
2886 | ||
2887 | /* | |
2888 | * free file space until done or until there is an error | |
2889 | */ | |
2890 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
2891 | while (!error && !done) { | |
2892 | ||
2893 | /* | |
91ebecc7 DC |
2894 | * allocate and setup the transaction. Allow this |
2895 | * transaction to dip into the reserve blocks to ensure | |
2896 | * the freeing of the space succeeds at ENOSPC. | |
1da177e4 LT |
2897 | */ |
2898 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
91ebecc7 | 2899 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
2900 | error = xfs_trans_reserve(tp, |
2901 | resblks, | |
2902 | XFS_WRITE_LOG_RES(mp), | |
2903 | 0, | |
2904 | XFS_TRANS_PERM_LOG_RES, | |
2905 | XFS_WRITE_LOG_COUNT); | |
2906 | ||
2907 | /* | |
2908 | * check for running out of space | |
2909 | */ | |
2910 | if (error) { | |
2911 | /* | |
2912 | * Free the transaction structure. | |
2913 | */ | |
2914 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
2915 | xfs_trans_cancel(tp, 0); | |
2916 | break; | |
2917 | } | |
2918 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 CH |
2919 | error = xfs_trans_reserve_quota(tp, mp, |
2920 | ip->i_udquot, ip->i_gdquot, | |
2921 | resblks, 0, XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
2922 | if (error) |
2923 | goto error1; | |
2924 | ||
2925 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2926 | xfs_trans_ihold(tp, ip); | |
2927 | ||
2928 | /* | |
2929 | * issue the bunmapi() call to free the blocks | |
2930 | */ | |
9d87c319 | 2931 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 2932 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
1da177e4 | 2933 | endoffset_fsb - startoffset_fsb, |
3e57ecf6 | 2934 | 0, 2, &firstfsb, &free_list, NULL, &done); |
1da177e4 LT |
2935 | if (error) { |
2936 | goto error0; | |
2937 | } | |
2938 | ||
2939 | /* | |
2940 | * complete the transaction | |
2941 | */ | |
f7c99b6f | 2942 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2943 | if (error) { |
2944 | goto error0; | |
2945 | } | |
2946 | ||
1c72bf90 | 2947 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2948 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2949 | } | |
2950 | ||
2951 | out_unlock_iolock: | |
2952 | if (need_iolock) | |
2953 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
2954 | return error; | |
2955 | ||
2956 | error0: | |
2957 | xfs_bmap_cancel(&free_list); | |
2958 | error1: | |
2959 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
2960 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : | |
2961 | XFS_ILOCK_EXCL); | |
2962 | return error; | |
2963 | } | |
2964 | ||
2965 | /* | |
2966 | * xfs_change_file_space() | |
2967 | * This routine allocates or frees disk space for the given file. | |
2968 | * The user specified parameters are checked for alignment and size | |
2969 | * limitations. | |
2970 | * | |
2971 | * RETURNS: | |
2972 | * 0 on success | |
2973 | * errno on error | |
2974 | * | |
2975 | */ | |
2976 | int | |
2977 | xfs_change_file_space( | |
993386c1 | 2978 | xfs_inode_t *ip, |
1da177e4 LT |
2979 | int cmd, |
2980 | xfs_flock64_t *bf, | |
2981 | xfs_off_t offset, | |
1da177e4 LT |
2982 | int attr_flags) |
2983 | { | |
993386c1 | 2984 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
2985 | int clrprealloc; |
2986 | int error; | |
2987 | xfs_fsize_t fsize; | |
1da177e4 LT |
2988 | int setprealloc; |
2989 | xfs_off_t startoffset; | |
2990 | xfs_off_t llen; | |
2991 | xfs_trans_t *tp; | |
0f285c8a | 2992 | struct iattr iattr; |
1da177e4 | 2993 | |
cf441eeb | 2994 | xfs_itrace_entry(ip); |
1da177e4 | 2995 | |
993386c1 | 2996 | if (!S_ISREG(ip->i_d.di_mode)) |
1da177e4 LT |
2997 | return XFS_ERROR(EINVAL); |
2998 | ||
1da177e4 LT |
2999 | switch (bf->l_whence) { |
3000 | case 0: /*SEEK_SET*/ | |
3001 | break; | |
3002 | case 1: /*SEEK_CUR*/ | |
3003 | bf->l_start += offset; | |
3004 | break; | |
3005 | case 2: /*SEEK_END*/ | |
ba87ea69 | 3006 | bf->l_start += ip->i_size; |
1da177e4 LT |
3007 | break; |
3008 | default: | |
3009 | return XFS_ERROR(EINVAL); | |
3010 | } | |
3011 | ||
3012 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; | |
3013 | ||
3014 | if ( (bf->l_start < 0) | |
3015 | || (bf->l_start > XFS_MAXIOFFSET(mp)) | |
3016 | || (bf->l_start + llen < 0) | |
3017 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) | |
3018 | return XFS_ERROR(EINVAL); | |
3019 | ||
3020 | bf->l_whence = 0; | |
3021 | ||
3022 | startoffset = bf->l_start; | |
ba87ea69 | 3023 | fsize = ip->i_size; |
1da177e4 LT |
3024 | |
3025 | /* | |
3026 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve | |
3027 | * file space. | |
3028 | * These calls do NOT zero the data space allocated to the file, | |
3029 | * nor do they change the file size. | |
3030 | * | |
3031 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file | |
3032 | * space. | |
3033 | * These calls cause the new file data to be zeroed and the file | |
3034 | * size to be changed. | |
3035 | */ | |
3036 | setprealloc = clrprealloc = 0; | |
3037 | ||
3038 | switch (cmd) { | |
3039 | case XFS_IOC_RESVSP: | |
3040 | case XFS_IOC_RESVSP64: | |
3041 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, | |
3042 | 1, attr_flags); | |
3043 | if (error) | |
3044 | return error; | |
3045 | setprealloc = 1; | |
3046 | break; | |
3047 | ||
3048 | case XFS_IOC_UNRESVSP: | |
3049 | case XFS_IOC_UNRESVSP64: | |
3050 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, | |
3051 | attr_flags))) | |
3052 | return error; | |
3053 | break; | |
3054 | ||
3055 | case XFS_IOC_ALLOCSP: | |
3056 | case XFS_IOC_ALLOCSP64: | |
3057 | case XFS_IOC_FREESP: | |
3058 | case XFS_IOC_FREESP64: | |
3059 | if (startoffset > fsize) { | |
3060 | error = xfs_alloc_file_space(ip, fsize, | |
3061 | startoffset - fsize, 0, attr_flags); | |
3062 | if (error) | |
3063 | break; | |
3064 | } | |
3065 | ||
0f285c8a CH |
3066 | iattr.ia_valid = ATTR_SIZE; |
3067 | iattr.ia_size = startoffset; | |
1da177e4 | 3068 | |
ea5a3dc8 | 3069 | error = xfs_setattr(ip, &iattr, attr_flags); |
1da177e4 LT |
3070 | |
3071 | if (error) | |
3072 | return error; | |
3073 | ||
3074 | clrprealloc = 1; | |
3075 | break; | |
3076 | ||
3077 | default: | |
3078 | ASSERT(0); | |
3079 | return XFS_ERROR(EINVAL); | |
3080 | } | |
3081 | ||
3082 | /* | |
3083 | * update the inode timestamp, mode, and prealloc flag bits | |
3084 | */ | |
3085 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
3086 | ||
3087 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), | |
3088 | 0, 0, 0))) { | |
3089 | /* ASSERT(0); */ | |
3090 | xfs_trans_cancel(tp, 0); | |
3091 | return error; | |
3092 | } | |
3093 | ||
3094 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3095 | ||
3096 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
3097 | xfs_trans_ihold(tp, ip); | |
3098 | ||
0f285c8a | 3099 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
1da177e4 LT |
3100 | ip->i_d.di_mode &= ~S_ISUID; |
3101 | ||
3102 | /* | |
3103 | * Note that we don't have to worry about mandatory | |
3104 | * file locking being disabled here because we only | |
3105 | * clear the S_ISGID bit if the Group execute bit is | |
3106 | * on, but if it was on then mandatory locking wouldn't | |
3107 | * have been enabled. | |
3108 | */ | |
3109 | if (ip->i_d.di_mode & S_IXGRP) | |
3110 | ip->i_d.di_mode &= ~S_ISGID; | |
3111 | ||
3112 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
3113 | } | |
3114 | if (setprealloc) | |
3115 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; | |
3116 | else if (clrprealloc) | |
3117 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; | |
3118 | ||
3119 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
3120 | xfs_trans_set_sync(tp); | |
3121 | ||
1c72bf90 | 3122 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
3123 | |
3124 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3125 | ||
3126 | return error; | |
3127 | } |