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Commit | Line | Data |
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1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
16f7e0fe | 18 | |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
1da177e4 | 21 | #include "xfs_types.h" |
a844f451 | 22 | #include "xfs_bit.h" |
1da177e4 | 23 | #include "xfs_log.h" |
a844f451 | 24 | #include "xfs_inum.h" |
1da177e4 LT |
25 | #include "xfs_trans.h" |
26 | #include "xfs_sb.h" | |
27 | #include "xfs_ag.h" | |
1da177e4 LT |
28 | #include "xfs_dir2.h" |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_mount.h" | |
a844f451 | 31 | #include "xfs_da_btree.h" |
1da177e4 | 32 | #include "xfs_bmap_btree.h" |
a844f451 | 33 | #include "xfs_alloc_btree.h" |
1da177e4 | 34 | #include "xfs_ialloc_btree.h" |
1da177e4 | 35 | #include "xfs_dir2_sf.h" |
a844f451 | 36 | #include "xfs_attr_sf.h" |
1da177e4 | 37 | #include "xfs_dinode.h" |
1da177e4 | 38 | #include "xfs_inode.h" |
a844f451 | 39 | #include "xfs_inode_item.h" |
a844f451 NS |
40 | #include "xfs_itable.h" |
41 | #include "xfs_btree.h" | |
42 | #include "xfs_ialloc.h" | |
43 | #include "xfs_alloc.h" | |
1da177e4 | 44 | #include "xfs_bmap.h" |
1da177e4 LT |
45 | #include "xfs_attr.h" |
46 | #include "xfs_rw.h" | |
1da177e4 | 47 | #include "xfs_error.h" |
1da177e4 LT |
48 | #include "xfs_quota.h" |
49 | #include "xfs_utils.h" | |
a844f451 | 50 | #include "xfs_rtalloc.h" |
1da177e4 | 51 | #include "xfs_trans_space.h" |
1da177e4 | 52 | #include "xfs_log_priv.h" |
2a82b8be | 53 | #include "xfs_filestream.h" |
993386c1 | 54 | #include "xfs_vnodeops.h" |
1da177e4 | 55 | |
1da177e4 LT |
56 | int |
57 | xfs_setattr( | |
0f285c8a CH |
58 | struct xfs_inode *ip, |
59 | struct iattr *iattr, | |
ea5a3dc8 | 60 | int flags) |
1da177e4 | 61 | { |
993386c1 | 62 | xfs_mount_t *mp = ip->i_mount; |
e4f75291 | 63 | struct inode *inode = VFS_I(ip); |
0f285c8a | 64 | int mask = iattr->ia_valid; |
1da177e4 | 65 | xfs_trans_t *tp; |
1da177e4 LT |
66 | int code; |
67 | uint lock_flags; | |
68 | uint commit_flags=0; | |
69 | uid_t uid=0, iuid=0; | |
70 | gid_t gid=0, igid=0; | |
71 | int timeflags = 0; | |
1da177e4 | 72 | struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2; |
5fcbab35 | 73 | int need_iolock = 1; |
1da177e4 | 74 | |
cf441eeb | 75 | xfs_itrace_entry(ip); |
1da177e4 | 76 | |
bd186aa9 | 77 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
78 | return XFS_ERROR(EROFS); |
79 | ||
1da177e4 LT |
80 | if (XFS_FORCED_SHUTDOWN(mp)) |
81 | return XFS_ERROR(EIO); | |
82 | ||
c4cd747e CH |
83 | code = -inode_change_ok(inode, iattr); |
84 | if (code) | |
85 | return code; | |
86 | ||
1da177e4 LT |
87 | olddquot1 = olddquot2 = NULL; |
88 | udqp = gdqp = NULL; | |
89 | ||
90 | /* | |
91 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
92 | * before we start any other transactions. Trying to do this later | |
93 | * is messy. We don't care to take a readlock to look at the ids | |
94 | * in inode here, because we can't hold it across the trans_reserve. | |
95 | * If the IDs do change before we take the ilock, we're covered | |
96 | * because the i_*dquot fields will get updated anyway. | |
97 | */ | |
0f285c8a | 98 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { |
1da177e4 LT |
99 | uint qflags = 0; |
100 | ||
0f285c8a CH |
101 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { |
102 | uid = iattr->ia_uid; | |
1da177e4 LT |
103 | qflags |= XFS_QMOPT_UQUOTA; |
104 | } else { | |
105 | uid = ip->i_d.di_uid; | |
106 | } | |
0f285c8a CH |
107 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { |
108 | gid = iattr->ia_gid; | |
1da177e4 LT |
109 | qflags |= XFS_QMOPT_GQUOTA; |
110 | } else { | |
111 | gid = ip->i_d.di_gid; | |
112 | } | |
25fe55e8 | 113 | |
1da177e4 LT |
114 | /* |
115 | * We take a reference when we initialize udqp and gdqp, | |
116 | * so it is important that we never blindly double trip on | |
117 | * the same variable. See xfs_create() for an example. | |
118 | */ | |
119 | ASSERT(udqp == NULL); | |
120 | ASSERT(gdqp == NULL); | |
25fe55e8 CH |
121 | code = XFS_QM_DQVOPALLOC(mp, ip, uid, gid, ip->i_d.di_projid, |
122 | qflags, &udqp, &gdqp); | |
1da177e4 | 123 | if (code) |
014c2544 | 124 | return code; |
1da177e4 LT |
125 | } |
126 | ||
127 | /* | |
128 | * For the other attributes, we acquire the inode lock and | |
129 | * first do an error checking pass. | |
130 | */ | |
131 | tp = NULL; | |
132 | lock_flags = XFS_ILOCK_EXCL; | |
0f285c8a | 133 | if (flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 134 | need_iolock = 0; |
0f285c8a CH |
135 | if (!(mask & ATTR_SIZE)) { |
136 | if ((mask != (ATTR_CTIME|ATTR_ATIME|ATTR_MTIME)) || | |
1da177e4 LT |
137 | (mp->m_flags & XFS_MOUNT_WSYNC)) { |
138 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); | |
139 | commit_flags = 0; | |
140 | if ((code = xfs_trans_reserve(tp, 0, | |
141 | XFS_ICHANGE_LOG_RES(mp), 0, | |
142 | 0, 0))) { | |
143 | lock_flags = 0; | |
144 | goto error_return; | |
145 | } | |
146 | } | |
147 | } else { | |
eb9df39d | 148 | if (DM_EVENT_ENABLED(ip, DM_EVENT_TRUNCATE) && |
0f285c8a | 149 | !(flags & XFS_ATTR_DMI)) { |
1da177e4 | 150 | int dmflags = AT_DELAY_FLAG(flags) | DM_SEM_FLAG_WR; |
bc4ac74a | 151 | code = XFS_SEND_DATA(mp, DM_EVENT_TRUNCATE, ip, |
0f285c8a | 152 | iattr->ia_size, 0, dmflags, NULL); |
1da177e4 LT |
153 | if (code) { |
154 | lock_flags = 0; | |
155 | goto error_return; | |
156 | } | |
157 | } | |
158 | if (need_iolock) | |
159 | lock_flags |= XFS_IOLOCK_EXCL; | |
160 | } | |
161 | ||
162 | xfs_ilock(ip, lock_flags); | |
163 | ||
1da177e4 LT |
164 | /* |
165 | * Change file ownership. Must be the owner or privileged. | |
1da177e4 | 166 | */ |
0f285c8a | 167 | if (mask & (ATTR_UID|ATTR_GID)) { |
1da177e4 LT |
168 | /* |
169 | * These IDs could have changed since we last looked at them. | |
170 | * But, we're assured that if the ownership did change | |
171 | * while we didn't have the inode locked, inode's dquot(s) | |
172 | * would have changed also. | |
173 | */ | |
174 | iuid = ip->i_d.di_uid; | |
1da177e4 | 175 | igid = ip->i_d.di_gid; |
0f285c8a CH |
176 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
177 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; | |
1da177e4 | 178 | |
1da177e4 | 179 | /* |
25fe55e8 | 180 | * Do a quota reservation only if uid/gid is actually |
1da177e4 LT |
181 | * going to change. |
182 | */ | |
183 | if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) || | |
184 | (XFS_IS_GQUOTA_ON(mp) && igid != gid)) { | |
185 | ASSERT(tp); | |
186 | code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp, | |
187 | capable(CAP_FOWNER) ? | |
188 | XFS_QMOPT_FORCE_RES : 0); | |
189 | if (code) /* out of quota */ | |
190 | goto error_return; | |
191 | } | |
192 | } | |
193 | ||
194 | /* | |
195 | * Truncate file. Must have write permission and not be a directory. | |
196 | */ | |
0f285c8a | 197 | if (mask & ATTR_SIZE) { |
1da177e4 | 198 | /* Short circuit the truncate case for zero length files */ |
0f285c8a CH |
199 | if (iattr->ia_size == 0 && |
200 | ip->i_size == 0 && ip->i_d.di_nextents == 0) { | |
1da177e4 LT |
201 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
202 | lock_flags &= ~XFS_ILOCK_EXCL; | |
0f285c8a | 203 | if (mask & ATTR_CTIME) |
1da177e4 LT |
204 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
205 | code = 0; | |
206 | goto error_return; | |
207 | } | |
208 | ||
42173f68 | 209 | if (S_ISDIR(ip->i_d.di_mode)) { |
1da177e4 LT |
210 | code = XFS_ERROR(EISDIR); |
211 | goto error_return; | |
42173f68 | 212 | } else if (!S_ISREG(ip->i_d.di_mode)) { |
1da177e4 LT |
213 | code = XFS_ERROR(EINVAL); |
214 | goto error_return; | |
215 | } | |
c4cd747e | 216 | |
1da177e4 LT |
217 | /* |
218 | * Make sure that the dquots are attached to the inode. | |
219 | */ | |
c4cd747e CH |
220 | code = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED); |
221 | if (code) | |
1da177e4 | 222 | goto error_return; |
1da177e4 | 223 | |
c4cd747e CH |
224 | /* |
225 | * Now we can make the changes. Before we join the inode | |
226 | * to the transaction, if ATTR_SIZE is set then take care of | |
227 | * the part of the truncation that must be done without the | |
228 | * inode lock. This needs to be done before joining the inode | |
229 | * to the transaction, because the inode cannot be unlocked | |
230 | * once it is a part of the transaction. | |
231 | */ | |
0f285c8a | 232 | if (iattr->ia_size > ip->i_size) { |
61436feb CH |
233 | /* |
234 | * Do the first part of growing a file: zero any data | |
235 | * in the last block that is beyond the old EOF. We | |
236 | * need to do this before the inode is joined to the | |
237 | * transaction to modify the i_size. | |
238 | */ | |
0f285c8a | 239 | code = xfs_zero_eof(ip, iattr->ia_size, ip->i_size); |
374e2ac3 | 240 | } |
1da177e4 | 241 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
c32676ee DC |
242 | |
243 | /* | |
244 | * We are going to log the inode size change in this | |
245 | * transaction so any previous writes that are beyond the on | |
246 | * disk EOF and the new EOF that have not been written out need | |
247 | * to be written here. If we do not write the data out, we | |
248 | * expose ourselves to the null files problem. | |
249 | * | |
250 | * Only flush from the on disk size to the smaller of the in | |
251 | * memory file size or the new size as that's the range we | |
252 | * really care about here and prevents waiting for other data | |
253 | * not within the range we care about here. | |
254 | */ | |
255 | if (!code && | |
0f285c8a CH |
256 | ip->i_size != ip->i_d.di_size && |
257 | iattr->ia_size > ip->i_d.di_size) { | |
739bfb2a | 258 | code = xfs_flush_pages(ip, |
0f285c8a | 259 | ip->i_d.di_size, iattr->ia_size, |
c32676ee DC |
260 | XFS_B_ASYNC, FI_NONE); |
261 | } | |
262 | ||
263 | /* wait for all I/O to complete */ | |
25e41b3d | 264 | xfs_ioend_wait(ip); |
c32676ee | 265 | |
1da177e4 | 266 | if (!code) |
0f285c8a | 267 | code = xfs_itruncate_data(ip, iattr->ia_size); |
1da177e4 LT |
268 | if (code) { |
269 | ASSERT(tp == NULL); | |
270 | lock_flags &= ~XFS_ILOCK_EXCL; | |
271 | ASSERT(lock_flags == XFS_IOLOCK_EXCL); | |
272 | goto error_return; | |
273 | } | |
274 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); | |
275 | if ((code = xfs_trans_reserve(tp, 0, | |
276 | XFS_ITRUNCATE_LOG_RES(mp), 0, | |
277 | XFS_TRANS_PERM_LOG_RES, | |
278 | XFS_ITRUNCATE_LOG_COUNT))) { | |
279 | xfs_trans_cancel(tp, 0); | |
280 | if (need_iolock) | |
281 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
282 | return code; | |
283 | } | |
284 | commit_flags = XFS_TRANS_RELEASE_LOG_RES; | |
285 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1da177e4 | 286 | |
1da177e4 LT |
287 | xfs_trans_ijoin(tp, ip, lock_flags); |
288 | xfs_trans_ihold(tp, ip); | |
1da177e4 | 289 | |
44d814ce DC |
290 | /* |
291 | * Only change the c/mtime if we are changing the size | |
292 | * or we are explicitly asked to change it. This handles | |
293 | * the semantic difference between truncate() and ftruncate() | |
294 | * as implemented in the VFS. | |
295 | */ | |
0f285c8a | 296 | if (iattr->ia_size != ip->i_size || (mask & ATTR_CTIME)) |
44d814ce DC |
297 | timeflags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; |
298 | ||
0f285c8a CH |
299 | if (iattr->ia_size > ip->i_size) { |
300 | ip->i_d.di_size = iattr->ia_size; | |
301 | ip->i_size = iattr->ia_size; | |
302 | if (!(flags & XFS_ATTR_DMI)) | |
61436feb CH |
303 | xfs_ichgtime(ip, XFS_ICHGTIME_CHG); |
304 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
0f285c8a CH |
305 | } else if (iattr->ia_size <= ip->i_size || |
306 | (iattr->ia_size == 0 && ip->i_d.di_nextents)) { | |
1da177e4 LT |
307 | /* |
308 | * signal a sync transaction unless | |
309 | * we're truncating an already unlinked | |
310 | * file on a wsync filesystem | |
311 | */ | |
0f285c8a | 312 | code = xfs_itruncate_finish(&tp, ip, iattr->ia_size, |
1da177e4 LT |
313 | XFS_DATA_FORK, |
314 | ((ip->i_d.di_nlink != 0 || | |
315 | !(mp->m_flags & XFS_MOUNT_WSYNC)) | |
316 | ? 1 : 0)); | |
7d4fb40a | 317 | if (code) |
1da177e4 | 318 | goto abort_return; |
7d4fb40a NS |
319 | /* |
320 | * Truncated "down", so we're removing references | |
321 | * to old data here - if we now delay flushing for | |
322 | * a long time, we expose ourselves unduly to the | |
323 | * notorious NULL files problem. So, we mark this | |
324 | * vnode and flush it when the file is closed, and | |
325 | * do not wait the usual (long) time for writeout. | |
326 | */ | |
b3aea4ed | 327 | xfs_iflags_set(ip, XFS_ITRUNCATED); |
1da177e4 | 328 | } |
c4cd747e CH |
329 | } else if (tp) { |
330 | xfs_trans_ijoin(tp, ip, lock_flags); | |
331 | xfs_trans_ihold(tp, ip); | |
1da177e4 LT |
332 | } |
333 | ||
334 | /* | |
335 | * Change file ownership. Must be the owner or privileged. | |
1da177e4 | 336 | */ |
0f285c8a | 337 | if (mask & (ATTR_UID|ATTR_GID)) { |
1da177e4 LT |
338 | /* |
339 | * CAP_FSETID overrides the following restrictions: | |
340 | * | |
341 | * The set-user-ID and set-group-ID bits of a file will be | |
342 | * cleared upon successful return from chown() | |
343 | */ | |
344 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && | |
345 | !capable(CAP_FSETID)) { | |
346 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); | |
347 | } | |
348 | ||
349 | /* | |
350 | * Change the ownerships and register quota modifications | |
351 | * in the transaction. | |
352 | */ | |
353 | if (iuid != uid) { | |
354 | if (XFS_IS_UQUOTA_ON(mp)) { | |
0f285c8a | 355 | ASSERT(mask & ATTR_UID); |
1da177e4 LT |
356 | ASSERT(udqp); |
357 | olddquot1 = XFS_QM_DQVOPCHOWN(mp, tp, ip, | |
358 | &ip->i_udquot, udqp); | |
359 | } | |
360 | ip->i_d.di_uid = uid; | |
f13fae2d | 361 | inode->i_uid = uid; |
1da177e4 LT |
362 | } |
363 | if (igid != gid) { | |
364 | if (XFS_IS_GQUOTA_ON(mp)) { | |
c8ad20ff | 365 | ASSERT(!XFS_IS_PQUOTA_ON(mp)); |
0f285c8a | 366 | ASSERT(mask & ATTR_GID); |
1da177e4 LT |
367 | ASSERT(gdqp); |
368 | olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip, | |
369 | &ip->i_gdquot, gdqp); | |
370 | } | |
371 | ip->i_d.di_gid = gid; | |
f13fae2d | 372 | inode->i_gid = gid; |
1da177e4 | 373 | } |
1da177e4 LT |
374 | |
375 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); | |
376 | timeflags |= XFS_ICHGTIME_CHG; | |
377 | } | |
378 | ||
c4cd747e CH |
379 | /* |
380 | * Change file access modes. | |
381 | */ | |
382 | if (mask & ATTR_MODE) { | |
383 | umode_t mode = iattr->ia_mode; | |
384 | ||
385 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
386 | mode &= ~S_ISGID; | |
387 | ||
388 | ip->i_d.di_mode &= S_IFMT; | |
389 | ip->i_d.di_mode |= mode & ~S_IFMT; | |
390 | ||
391 | inode->i_mode &= S_IFMT; | |
392 | inode->i_mode |= mode & ~S_IFMT; | |
393 | ||
394 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
395 | timeflags |= XFS_ICHGTIME_CHG; | |
396 | } | |
1da177e4 LT |
397 | |
398 | /* | |
399 | * Change file access or modified times. | |
400 | */ | |
0f285c8a CH |
401 | if (mask & (ATTR_ATIME|ATTR_MTIME)) { |
402 | if (mask & ATTR_ATIME) { | |
f13fae2d | 403 | inode->i_atime = iattr->ia_atime; |
0f285c8a CH |
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; | |
1da177e4 | 406 | ip->i_update_core = 1; |
1da177e4 | 407 | } |
0f285c8a | 408 | if (mask & ATTR_MTIME) { |
f13fae2d | 409 | inode->i_mtime = iattr->ia_mtime; |
0f285c8a CH |
410 | ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec; |
411 | ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec; | |
1da177e4 LT |
412 | timeflags &= ~XFS_ICHGTIME_MOD; |
413 | timeflags |= XFS_ICHGTIME_CHG; | |
414 | } | |
0f285c8a | 415 | if (tp && (mask & (ATTR_MTIME_SET|ATTR_ATIME_SET))) |
1da177e4 LT |
416 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); |
417 | } | |
418 | ||
1da177e4 | 419 | /* |
0f285c8a | 420 | * Change file inode change time only if ATTR_CTIME set |
1da177e4 LT |
421 | * AND we have been called by a DMI function. |
422 | */ | |
423 | ||
0f285c8a | 424 | if ((flags & XFS_ATTR_DMI) && (mask & ATTR_CTIME)) { |
f13fae2d | 425 | inode->i_ctime = iattr->ia_ctime; |
0f285c8a CH |
426 | ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; |
427 | ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec; | |
1da177e4 LT |
428 | ip->i_update_core = 1; |
429 | timeflags &= ~XFS_ICHGTIME_CHG; | |
430 | } | |
431 | ||
432 | /* | |
433 | * Send out timestamp changes that need to be set to the | |
434 | * current time. Not done when called by a DMI function. | |
435 | */ | |
0f285c8a | 436 | if (timeflags && !(flags & XFS_ATTR_DMI)) |
1da177e4 LT |
437 | xfs_ichgtime(ip, timeflags); |
438 | ||
439 | XFS_STATS_INC(xs_ig_attrchg); | |
440 | ||
441 | /* | |
442 | * If this is a synchronous mount, make sure that the | |
443 | * transaction goes to disk before returning to the user. | |
444 | * This is slightly sub-optimal in that truncates require | |
c41564b5 | 445 | * two sync transactions instead of one for wsync filesystems. |
1da177e4 LT |
446 | * One for the truncate and one for the timestamps since we |
447 | * don't want to change the timestamps unless we're sure the | |
448 | * truncate worked. Truncates are less than 1% of the laddis | |
449 | * mix so this probably isn't worth the trouble to optimize. | |
450 | */ | |
451 | code = 0; | |
452 | if (tp) { | |
453 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
454 | xfs_trans_set_sync(tp); | |
455 | ||
1c72bf90 | 456 | code = xfs_trans_commit(tp, commit_flags); |
1da177e4 LT |
457 | } |
458 | ||
1da177e4 LT |
459 | xfs_iunlock(ip, lock_flags); |
460 | ||
461 | /* | |
462 | * Release any dquot(s) the inode had kept before chown. | |
463 | */ | |
464 | XFS_QM_DQRELE(mp, olddquot1); | |
465 | XFS_QM_DQRELE(mp, olddquot2); | |
466 | XFS_QM_DQRELE(mp, udqp); | |
467 | XFS_QM_DQRELE(mp, gdqp); | |
468 | ||
469 | if (code) { | |
470 | return code; | |
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: | |
485 | XFS_QM_DQRELE(mp, udqp); | |
486 | XFS_QM_DQRELE(mp, gdqp); | |
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 | ||
527 | bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0); | |
528 | error = XFS_BUF_GETERROR(bp); | |
529 | if (error) { | |
530 | xfs_ioerror_alert("xfs_readlink", | |
531 | ip->i_mount, bp, XFS_BUF_ADDR(bp)); | |
532 | xfs_buf_relse(bp); | |
533 | goto out; | |
534 | } | |
535 | if (pathlen < byte_cnt) | |
536 | byte_cnt = pathlen; | |
537 | pathlen -= byte_cnt; | |
538 | ||
539 | memcpy(link, XFS_BUF_PTR(bp), byte_cnt); | |
540 | xfs_buf_relse(bp); | |
541 | } | |
542 | ||
543 | link[ip->i_d.di_size] = '\0'; | |
544 | error = 0; | |
545 | ||
546 | out: | |
547 | return error; | |
548 | } | |
549 | ||
993386c1 | 550 | int |
1da177e4 | 551 | xfs_readlink( |
993386c1 | 552 | xfs_inode_t *ip, |
804c83c3 | 553 | char *link) |
1da177e4 | 554 | { |
804c83c3 | 555 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 556 | int pathlen; |
1da177e4 | 557 | int error = 0; |
1da177e4 | 558 | |
cf441eeb | 559 | xfs_itrace_entry(ip); |
1da177e4 LT |
560 | |
561 | if (XFS_FORCED_SHUTDOWN(mp)) | |
562 | return XFS_ERROR(EIO); | |
563 | ||
564 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
565 | ||
566 | ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK); | |
804c83c3 | 567 | ASSERT(ip->i_d.di_size <= MAXPATHLEN); |
1da177e4 | 568 | |
804c83c3 CH |
569 | pathlen = ip->i_d.di_size; |
570 | if (!pathlen) | |
571 | goto out; | |
1da177e4 LT |
572 | |
573 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
804c83c3 CH |
574 | memcpy(link, ip->i_df.if_u1.if_data, pathlen); |
575 | link[pathlen] = '\0'; | |
576 | } else { | |
577 | error = xfs_readlink_bmap(ip, link); | |
1da177e4 LT |
578 | } |
579 | ||
804c83c3 | 580 | out: |
1da177e4 | 581 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
1da177e4 LT |
582 | return error; |
583 | } | |
584 | ||
1da177e4 LT |
585 | /* |
586 | * xfs_fsync | |
587 | * | |
978b7237 DC |
588 | * This is called to sync the inode and its data out to disk. We need to hold |
589 | * the I/O lock while flushing the data, and the inode lock while flushing the | |
590 | * inode. The inode lock CANNOT be held while flushing the data, so acquire | |
591 | * after we're done with that. | |
1da177e4 | 592 | */ |
993386c1 | 593 | int |
1da177e4 | 594 | xfs_fsync( |
978b7237 | 595 | xfs_inode_t *ip) |
1da177e4 | 596 | { |
1da177e4 LT |
597 | xfs_trans_t *tp; |
598 | int error; | |
f538d4da | 599 | int log_flushed = 0, changed = 1; |
1da177e4 | 600 | |
cf441eeb | 601 | xfs_itrace_entry(ip); |
1da177e4 | 602 | |
1da177e4 LT |
603 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
604 | return XFS_ERROR(EIO); | |
605 | ||
978b7237 | 606 | /* capture size updates in I/O completion before writing the inode. */ |
2e656092 | 607 | error = xfs_wait_on_pages(ip, 0, -1); |
978b7237 DC |
608 | if (error) |
609 | return XFS_ERROR(error); | |
776a75fa | 610 | |
1da177e4 | 611 | /* |
978b7237 DC |
612 | * We always need to make sure that the required inode state is safe on |
613 | * disk. The vnode might be clean but we still might need to force the | |
614 | * log because of committed transactions that haven't hit the disk yet. | |
615 | * Likewise, there could be unflushed non-transactional changes to the | |
616 | * inode core that have to go to disk and this requires us to issue | |
617 | * a synchronous transaction to capture these changes correctly. | |
1da177e4 | 618 | * |
978b7237 DC |
619 | * This code relies on the assumption that if the update_* fields |
620 | * of the inode are clear and the inode is unpinned then it is clean | |
621 | * and no action is required. | |
1da177e4 LT |
622 | */ |
623 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
624 | ||
978b7237 | 625 | if (!(ip->i_update_size || ip->i_update_core)) { |
1da177e4 | 626 | /* |
978b7237 DC |
627 | * Timestamps/size haven't changed since last inode flush or |
628 | * inode transaction commit. That means either nothing got | |
629 | * written or a transaction committed which caught the updates. | |
630 | * If the latter happened and the transaction hasn't hit the | |
631 | * disk yet, the inode will be still be pinned. If it is, | |
632 | * force the log. | |
1da177e4 LT |
633 | */ |
634 | ||
635 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
636 | ||
637 | if (xfs_ipincount(ip)) { | |
978b7237 DC |
638 | error = _xfs_log_force(ip->i_mount, (xfs_lsn_t)0, |
639 | XFS_LOG_FORCE | XFS_LOG_SYNC, | |
f538d4da CH |
640 | &log_flushed); |
641 | } else { | |
642 | /* | |
978b7237 DC |
643 | * If the inode is not pinned and nothing has changed |
644 | * we don't need to flush the cache. | |
f538d4da CH |
645 | */ |
646 | changed = 0; | |
1da177e4 | 647 | } |
1da177e4 LT |
648 | } else { |
649 | /* | |
978b7237 DC |
650 | * Kick off a transaction to log the inode core to get the |
651 | * updates. The sync transaction will also force the log. | |
1da177e4 LT |
652 | */ |
653 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
654 | tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS); | |
978b7237 DC |
655 | error = xfs_trans_reserve(tp, 0, |
656 | XFS_FSYNC_TS_LOG_RES(ip->i_mount), 0, 0, 0); | |
657 | if (error) { | |
1da177e4 LT |
658 | xfs_trans_cancel(tp, 0); |
659 | return error; | |
660 | } | |
661 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
662 | ||
663 | /* | |
978b7237 DC |
664 | * Note - it's possible that we might have pushed ourselves out |
665 | * of the way during trans_reserve which would flush the inode. | |
666 | * But there's no guarantee that the inode buffer has actually | |
667 | * gone out yet (it's delwri). Plus the buffer could be pinned | |
668 | * anyway if it's part of an inode in another recent | |
669 | * transaction. So we play it safe and fire off the | |
670 | * transaction anyway. | |
1da177e4 LT |
671 | */ |
672 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
673 | xfs_trans_ihold(tp, ip); | |
674 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
978b7237 | 675 | xfs_trans_set_sync(tp); |
1c72bf90 | 676 | error = _xfs_trans_commit(tp, 0, &log_flushed); |
1da177e4 LT |
677 | |
678 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
679 | } | |
f538d4da CH |
680 | |
681 | if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) { | |
682 | /* | |
683 | * If the log write didn't issue an ordered tag we need | |
684 | * to flush the disk cache for the data device now. | |
685 | */ | |
686 | if (!log_flushed) | |
687 | xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp); | |
688 | ||
689 | /* | |
690 | * If this inode is on the RT dev we need to flush that | |
c41564b5 | 691 | * cache as well. |
f538d4da | 692 | */ |
71ddabb9 | 693 | if (XFS_IS_REALTIME_INODE(ip)) |
f538d4da CH |
694 | xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp); |
695 | } | |
696 | ||
1da177e4 LT |
697 | return error; |
698 | } | |
699 | ||
700 | /* | |
92dfe8d2 DC |
701 | * This is called by xfs_inactive to free any blocks beyond eof |
702 | * when the link count isn't zero and by xfs_dm_punch_hole() when | |
703 | * punching a hole to EOF. | |
1da177e4 | 704 | */ |
92dfe8d2 DC |
705 | int |
706 | xfs_free_eofblocks( | |
1da177e4 | 707 | xfs_mount_t *mp, |
92dfe8d2 DC |
708 | xfs_inode_t *ip, |
709 | int flags) | |
1da177e4 LT |
710 | { |
711 | xfs_trans_t *tp; | |
712 | int error; | |
713 | xfs_fileoff_t end_fsb; | |
714 | xfs_fileoff_t last_fsb; | |
715 | xfs_filblks_t map_len; | |
716 | int nimaps; | |
717 | xfs_bmbt_irec_t imap; | |
92dfe8d2 | 718 | int use_iolock = (flags & XFS_FREE_EOF_LOCK); |
1da177e4 LT |
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 | */ | |
742 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) | |
014c2544 | 743 | return error; |
1da177e4 LT |
744 | |
745 | /* | |
746 | * There are blocks after the end of file. | |
747 | * Free them up now by truncating the file to | |
748 | * its current size. | |
749 | */ | |
750 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
751 | ||
752 | /* | |
753 | * Do the xfs_itruncate_start() call before | |
754 | * reserving any log space because | |
755 | * itruncate_start will call into the buffer | |
756 | * cache and we can't | |
757 | * do that within a transaction. | |
758 | */ | |
92dfe8d2 DC |
759 | if (use_iolock) |
760 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
d3cf2094 | 761 | error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, |
ba87ea69 | 762 | ip->i_size); |
d3cf2094 | 763 | if (error) { |
87ae3c24 | 764 | xfs_trans_cancel(tp, 0); |
92dfe8d2 DC |
765 | if (use_iolock) |
766 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
d3cf2094 LM |
767 | return error; |
768 | } | |
1da177e4 LT |
769 | |
770 | error = xfs_trans_reserve(tp, 0, | |
771 | XFS_ITRUNCATE_LOG_RES(mp), | |
772 | 0, XFS_TRANS_PERM_LOG_RES, | |
773 | XFS_ITRUNCATE_LOG_COUNT); | |
774 | if (error) { | |
775 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
776 | xfs_trans_cancel(tp, 0); | |
777 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 778 | return error; |
1da177e4 LT |
779 | } |
780 | ||
781 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
782 | xfs_trans_ijoin(tp, ip, | |
783 | XFS_IOLOCK_EXCL | | |
784 | XFS_ILOCK_EXCL); | |
785 | xfs_trans_ihold(tp, ip); | |
786 | ||
787 | error = xfs_itruncate_finish(&tp, ip, | |
ba87ea69 | 788 | ip->i_size, |
1da177e4 LT |
789 | XFS_DATA_FORK, |
790 | 0); | |
791 | /* | |
792 | * If we get an error at this point we | |
793 | * simply don't bother truncating the file. | |
794 | */ | |
795 | if (error) { | |
796 | xfs_trans_cancel(tp, | |
797 | (XFS_TRANS_RELEASE_LOG_RES | | |
798 | XFS_TRANS_ABORT)); | |
799 | } else { | |
800 | error = xfs_trans_commit(tp, | |
1c72bf90 | 801 | XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 802 | } |
92dfe8d2 DC |
803 | xfs_iunlock(ip, (use_iolock ? (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL) |
804 | : XFS_ILOCK_EXCL)); | |
1da177e4 | 805 | } |
014c2544 | 806 | return error; |
1da177e4 LT |
807 | } |
808 | ||
809 | /* | |
810 | * Free a symlink that has blocks associated with it. | |
811 | */ | |
812 | STATIC int | |
813 | xfs_inactive_symlink_rmt( | |
814 | xfs_inode_t *ip, | |
815 | xfs_trans_t **tpp) | |
816 | { | |
817 | xfs_buf_t *bp; | |
818 | int committed; | |
819 | int done; | |
820 | int error; | |
821 | xfs_fsblock_t first_block; | |
822 | xfs_bmap_free_t free_list; | |
823 | int i; | |
824 | xfs_mount_t *mp; | |
825 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
826 | int nmaps; | |
827 | xfs_trans_t *ntp; | |
828 | int size; | |
829 | xfs_trans_t *tp; | |
830 | ||
831 | tp = *tpp; | |
832 | mp = ip->i_mount; | |
833 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); | |
834 | /* | |
835 | * We're freeing a symlink that has some | |
836 | * blocks allocated to it. Free the | |
837 | * blocks here. We know that we've got | |
838 | * either 1 or 2 extents and that we can | |
839 | * free them all in one bunmapi call. | |
840 | */ | |
841 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
842 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
843 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
844 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
845 | xfs_trans_cancel(tp, 0); | |
846 | *tpp = NULL; | |
847 | return error; | |
848 | } | |
849 | /* | |
850 | * Lock the inode, fix the size, and join it to the transaction. | |
851 | * Hold it so in the normal path, we still have it locked for | |
852 | * the second transaction. In the error paths we need it | |
853 | * held so the cancel won't rele it, see below. | |
854 | */ | |
855 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
856 | size = (int)ip->i_d.di_size; | |
857 | ip->i_d.di_size = 0; | |
858 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
859 | xfs_trans_ihold(tp, ip); | |
860 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
861 | /* | |
862 | * Find the block(s) so we can inval and unmap them. | |
863 | */ | |
864 | done = 0; | |
9d87c319 | 865 | xfs_bmap_init(&free_list, &first_block); |
e8c96f8c | 866 | nmaps = ARRAY_SIZE(mval); |
1da177e4 LT |
867 | if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size), |
868 | XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps, | |
3e57ecf6 | 869 | &free_list, NULL))) |
1da177e4 LT |
870 | goto error0; |
871 | /* | |
872 | * Invalidate the block(s). | |
873 | */ | |
874 | for (i = 0; i < nmaps; i++) { | |
875 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
876 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
877 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
878 | xfs_trans_binval(tp, bp); | |
879 | } | |
880 | /* | |
881 | * Unmap the dead block(s) to the free_list. | |
882 | */ | |
883 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, | |
3e57ecf6 | 884 | &first_block, &free_list, NULL, &done))) |
1da177e4 LT |
885 | goto error1; |
886 | ASSERT(done); | |
887 | /* | |
888 | * Commit the first transaction. This logs the EFI and the inode. | |
889 | */ | |
f7c99b6f | 890 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
1da177e4 LT |
891 | goto error1; |
892 | /* | |
893 | * The transaction must have been committed, since there were | |
894 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
895 | * The new tp has the extent freeing and EFDs. | |
896 | */ | |
897 | ASSERT(committed); | |
898 | /* | |
899 | * The first xact was committed, so add the inode to the new one. | |
900 | * Mark it dirty so it will be logged and moved forward in the log as | |
901 | * part of every commit. | |
902 | */ | |
903 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
904 | xfs_trans_ihold(tp, ip); | |
905 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
906 | /* | |
907 | * Get a new, empty transaction to return to our caller. | |
908 | */ | |
909 | ntp = xfs_trans_dup(tp); | |
910 | /* | |
c41564b5 | 911 | * Commit the transaction containing extent freeing and EFDs. |
1da177e4 LT |
912 | * If we get an error on the commit here or on the reserve below, |
913 | * we need to unlock the inode since the new transaction doesn't | |
914 | * have the inode attached. | |
915 | */ | |
1c72bf90 | 916 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
917 | tp = ntp; |
918 | if (error) { | |
919 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
920 | goto error0; | |
921 | } | |
cc09c0dc DC |
922 | /* |
923 | * transaction commit worked ok so we can drop the extra ticket | |
924 | * reference that we gained in xfs_trans_dup() | |
925 | */ | |
926 | xfs_log_ticket_put(tp->t_ticket); | |
927 | ||
1da177e4 LT |
928 | /* |
929 | * Remove the memory for extent descriptions (just bookkeeping). | |
930 | */ | |
931 | if (ip->i_df.if_bytes) | |
932 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
933 | ASSERT(ip->i_df.if_bytes == 0); | |
934 | /* | |
935 | * Put an itruncate log reservation in the new transaction | |
936 | * for our caller. | |
937 | */ | |
938 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
939 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
940 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
941 | goto error0; | |
942 | } | |
943 | /* | |
944 | * Return with the inode locked but not joined to the transaction. | |
945 | */ | |
946 | *tpp = tp; | |
947 | return 0; | |
948 | ||
949 | error1: | |
950 | xfs_bmap_cancel(&free_list); | |
951 | error0: | |
952 | /* | |
953 | * Have to come here with the inode locked and either | |
954 | * (held and in the transaction) or (not in the transaction). | |
955 | * If the inode isn't held then cancel would iput it, but | |
956 | * that's wrong since this is inactive and the vnode ref | |
957 | * count is 0 already. | |
958 | * Cancel won't do anything to the inode if held, but it still | |
959 | * needs to be locked until the cancel is done, if it was | |
960 | * joined to the transaction. | |
961 | */ | |
962 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
963 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
964 | *tpp = NULL; | |
965 | return error; | |
966 | ||
967 | } | |
968 | ||
969 | STATIC int | |
970 | xfs_inactive_symlink_local( | |
971 | xfs_inode_t *ip, | |
972 | xfs_trans_t **tpp) | |
973 | { | |
974 | int error; | |
975 | ||
976 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); | |
977 | /* | |
978 | * We're freeing a symlink which fit into | |
979 | * the inode. Just free the memory used | |
980 | * to hold the old symlink. | |
981 | */ | |
982 | error = xfs_trans_reserve(*tpp, 0, | |
983 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), | |
984 | 0, XFS_TRANS_PERM_LOG_RES, | |
985 | XFS_ITRUNCATE_LOG_COUNT); | |
986 | ||
987 | if (error) { | |
988 | xfs_trans_cancel(*tpp, 0); | |
989 | *tpp = NULL; | |
014c2544 | 990 | return error; |
1da177e4 LT |
991 | } |
992 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
993 | ||
994 | /* | |
995 | * Zero length symlinks _can_ exist. | |
996 | */ | |
997 | if (ip->i_df.if_bytes > 0) { | |
998 | xfs_idata_realloc(ip, | |
999 | -(ip->i_df.if_bytes), | |
1000 | XFS_DATA_FORK); | |
1001 | ASSERT(ip->i_df.if_bytes == 0); | |
1002 | } | |
014c2544 | 1003 | return 0; |
1da177e4 LT |
1004 | } |
1005 | ||
1da177e4 LT |
1006 | STATIC int |
1007 | xfs_inactive_attrs( | |
1008 | xfs_inode_t *ip, | |
1009 | xfs_trans_t **tpp) | |
1010 | { | |
1011 | xfs_trans_t *tp; | |
1012 | int error; | |
1013 | xfs_mount_t *mp; | |
1014 | ||
579aa9ca | 1015 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
1da177e4 LT |
1016 | tp = *tpp; |
1017 | mp = ip->i_mount; | |
1018 | ASSERT(ip->i_d.di_forkoff != 0); | |
e5720eec | 1019 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 1020 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
e5720eec DC |
1021 | if (error) |
1022 | goto error_unlock; | |
1da177e4 LT |
1023 | |
1024 | error = xfs_attr_inactive(ip); | |
e5720eec DC |
1025 | if (error) |
1026 | goto error_unlock; | |
1da177e4 LT |
1027 | |
1028 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1029 | error = xfs_trans_reserve(tp, 0, | |
1030 | XFS_IFREE_LOG_RES(mp), | |
1031 | 0, XFS_TRANS_PERM_LOG_RES, | |
1032 | XFS_INACTIVE_LOG_COUNT); | |
e5720eec DC |
1033 | if (error) |
1034 | goto error_cancel; | |
1da177e4 LT |
1035 | |
1036 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1037 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1038 | xfs_trans_ihold(tp, ip); | |
1039 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
1040 | ||
1041 | ASSERT(ip->i_d.di_anextents == 0); | |
1042 | ||
1043 | *tpp = tp; | |
014c2544 | 1044 | return 0; |
e5720eec DC |
1045 | |
1046 | error_cancel: | |
1047 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1048 | xfs_trans_cancel(tp, 0); | |
1049 | error_unlock: | |
1050 | *tpp = NULL; | |
1051 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1052 | return error; | |
1da177e4 LT |
1053 | } |
1054 | ||
993386c1 | 1055 | int |
1da177e4 | 1056 | xfs_release( |
993386c1 | 1057 | xfs_inode_t *ip) |
1da177e4 | 1058 | { |
993386c1 | 1059 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
1060 | int error; |
1061 | ||
42173f68 | 1062 | if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) |
1da177e4 | 1063 | return 0; |
1da177e4 LT |
1064 | |
1065 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 1066 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
1067 | return 0; |
1068 | ||
2a82b8be | 1069 | if (!XFS_FORCED_SHUTDOWN(mp)) { |
b3aea4ed CH |
1070 | int truncated; |
1071 | ||
2a82b8be DC |
1072 | /* |
1073 | * If we are using filestreams, and we have an unlinked | |
1074 | * file that we are processing the last close on, then nothing | |
1075 | * will be able to reopen and write to this file. Purge this | |
1076 | * inode from the filestreams cache so that it doesn't delay | |
1077 | * teardown of the inode. | |
1078 | */ | |
1079 | if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip)) | |
1080 | xfs_filestream_deassociate(ip); | |
1081 | ||
fbf3ce8d CH |
1082 | /* |
1083 | * If we previously truncated this file and removed old data | |
1084 | * in the process, we want to initiate "early" writeout on | |
1085 | * the last close. This is an attempt to combat the notorious | |
1086 | * NULL files problem which is particularly noticable from a | |
1087 | * truncate down, buffered (re-)write (delalloc), followed by | |
1088 | * a crash. What we are effectively doing here is | |
1089 | * significantly reducing the time window where we'd otherwise | |
1090 | * be exposed to that problem. | |
1091 | */ | |
09262b43 | 1092 | truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); |
df80c933 | 1093 | if (truncated && VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) |
739bfb2a | 1094 | xfs_flush_pages(ip, 0, -1, XFS_B_ASYNC, FI_NONE); |
fbf3ce8d CH |
1095 | } |
1096 | ||
1da177e4 LT |
1097 | if (ip->i_d.di_nlink != 0) { |
1098 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
df80c933 | 1099 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
68bdb6ea | 1100 | ip->i_delayed_blks > 0)) && |
1da177e4 | 1101 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && |
dd9f438e NS |
1102 | (!(ip->i_d.di_flags & |
1103 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { | |
92dfe8d2 DC |
1104 | error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_LOCK); |
1105 | if (error) | |
014c2544 | 1106 | return error; |
1da177e4 LT |
1107 | } |
1108 | } | |
1109 | ||
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * xfs_inactive | |
1115 | * | |
1116 | * This is called when the vnode reference count for the vnode | |
1117 | * goes to zero. If the file has been unlinked, then it must | |
1118 | * now be truncated. Also, we clear all of the read-ahead state | |
1119 | * kept for the inode here since the file is now closed. | |
1120 | */ | |
993386c1 | 1121 | int |
1da177e4 | 1122 | xfs_inactive( |
993386c1 | 1123 | xfs_inode_t *ip) |
1da177e4 | 1124 | { |
67fcaa73 | 1125 | xfs_bmap_free_t free_list; |
1da177e4 LT |
1126 | xfs_fsblock_t first_block; |
1127 | int committed; | |
1128 | xfs_trans_t *tp; | |
1129 | xfs_mount_t *mp; | |
1130 | int error; | |
1131 | int truncate; | |
1132 | ||
cf441eeb | 1133 | xfs_itrace_entry(ip); |
1da177e4 | 1134 | |
1da177e4 LT |
1135 | /* |
1136 | * If the inode is already free, then there can be nothing | |
1137 | * to clean up here. | |
1138 | */ | |
cb4c8cc1 | 1139 | if (ip->i_d.di_mode == 0 || is_bad_inode(VFS_I(ip))) { |
1da177e4 LT |
1140 | ASSERT(ip->i_df.if_real_bytes == 0); |
1141 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
1142 | return VN_INACTIVE_CACHE; | |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * Only do a truncate if it's a regular file with | |
1147 | * some actual space in it. It's OK to look at the | |
1148 | * inode's fields without the lock because we're the | |
1149 | * only one with a reference to the inode. | |
1150 | */ | |
1151 | truncate = ((ip->i_d.di_nlink == 0) && | |
ba87ea69 LM |
1152 | ((ip->i_d.di_size != 0) || (ip->i_size != 0) || |
1153 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && | |
1da177e4 LT |
1154 | ((ip->i_d.di_mode & S_IFMT) == S_IFREG)); |
1155 | ||
1156 | mp = ip->i_mount; | |
1157 | ||
bc4ac74a CH |
1158 | if (ip->i_d.di_nlink == 0 && DM_EVENT_ENABLED(ip, DM_EVENT_DESTROY)) |
1159 | XFS_SEND_DESTROY(mp, ip, DM_RIGHT_NULL); | |
1da177e4 LT |
1160 | |
1161 | error = 0; | |
1162 | ||
1163 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
bd186aa9 | 1164 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
1da177e4 LT |
1165 | goto out; |
1166 | ||
1167 | if (ip->i_d.di_nlink != 0) { | |
1168 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
df80c933 | 1169 | ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || |
68bdb6ea | 1170 | ip->i_delayed_blks > 0)) && |
dd9f438e NS |
1171 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
1172 | (!(ip->i_d.di_flags & | |
1173 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || | |
1174 | (ip->i_delayed_blks != 0)))) { | |
92dfe8d2 DC |
1175 | error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_LOCK); |
1176 | if (error) | |
014c2544 | 1177 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1178 | } |
1179 | goto out; | |
1180 | } | |
1181 | ||
1182 | ASSERT(ip->i_d.di_nlink == 0); | |
1183 | ||
1184 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) | |
014c2544 | 1185 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1186 | |
1187 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1188 | if (truncate) { | |
1189 | /* | |
1190 | * Do the xfs_itruncate_start() call before | |
1191 | * reserving any log space because itruncate_start | |
1192 | * will call into the buffer cache and we can't | |
1193 | * do that within a transaction. | |
1194 | */ | |
1195 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
1196 | ||
d3cf2094 LM |
1197 | error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0); |
1198 | if (error) { | |
87ae3c24 | 1199 | xfs_trans_cancel(tp, 0); |
d3cf2094 LM |
1200 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
1201 | return VN_INACTIVE_CACHE; | |
1202 | } | |
1da177e4 LT |
1203 | |
1204 | error = xfs_trans_reserve(tp, 0, | |
1205 | XFS_ITRUNCATE_LOG_RES(mp), | |
1206 | 0, XFS_TRANS_PERM_LOG_RES, | |
1207 | XFS_ITRUNCATE_LOG_COUNT); | |
1208 | if (error) { | |
1209 | /* Don't call itruncate_cleanup */ | |
1210 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1211 | xfs_trans_cancel(tp, 0); | |
1212 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 1213 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1214 | } |
1215 | ||
1216 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1217 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1218 | xfs_trans_ihold(tp, ip); | |
1219 | ||
1220 | /* | |
1221 | * normally, we have to run xfs_itruncate_finish sync. | |
1222 | * But if filesystem is wsync and we're in the inactive | |
1223 | * path, then we know that nlink == 0, and that the | |
1224 | * xaction that made nlink == 0 is permanently committed | |
1225 | * since xfs_remove runs as a synchronous transaction. | |
1226 | */ | |
1227 | error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK, | |
1228 | (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0)); | |
1229 | ||
1230 | if (error) { | |
1231 | xfs_trans_cancel(tp, | |
1232 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
1233 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
014c2544 | 1234 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1235 | } |
1236 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) { | |
1237 | ||
1238 | /* | |
1239 | * If we get an error while cleaning up a | |
1240 | * symlink we bail out. | |
1241 | */ | |
1242 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? | |
1243 | xfs_inactive_symlink_rmt(ip, &tp) : | |
1244 | xfs_inactive_symlink_local(ip, &tp); | |
1245 | ||
1246 | if (error) { | |
1247 | ASSERT(tp == NULL); | |
014c2544 | 1248 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1249 | } |
1250 | ||
1251 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1252 | xfs_trans_ihold(tp, ip); | |
1253 | } else { | |
1254 | error = xfs_trans_reserve(tp, 0, | |
1255 | XFS_IFREE_LOG_RES(mp), | |
1256 | 0, XFS_TRANS_PERM_LOG_RES, | |
1257 | XFS_INACTIVE_LOG_COUNT); | |
1258 | if (error) { | |
1259 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1260 | xfs_trans_cancel(tp, 0); | |
014c2544 | 1261 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1262 | } |
1263 | ||
1264 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
1265 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1266 | xfs_trans_ihold(tp, ip); | |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * If there are attributes associated with the file | |
1271 | * then blow them away now. The code calls a routine | |
1272 | * that recursively deconstructs the attribute fork. | |
1273 | * We need to just commit the current transaction | |
1274 | * because we can't use it for xfs_attr_inactive(). | |
1275 | */ | |
1276 | if (ip->i_d.di_anextents > 0) { | |
1277 | error = xfs_inactive_attrs(ip, &tp); | |
1278 | /* | |
1279 | * If we got an error, the transaction is already | |
1280 | * cancelled, and the inode is unlocked. Just get out. | |
1281 | */ | |
1282 | if (error) | |
014c2544 | 1283 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1284 | } else if (ip->i_afp) { |
1285 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
1286 | } | |
1287 | ||
1288 | /* | |
1289 | * Free the inode. | |
1290 | */ | |
9d87c319 | 1291 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
1292 | error = xfs_ifree(tp, ip, &free_list); |
1293 | if (error) { | |
1294 | /* | |
1295 | * If we fail to free the inode, shut down. The cancel | |
1296 | * might do that, we need to make sure. Otherwise the | |
1297 | * inode might be lost for a long time or forever. | |
1298 | */ | |
1299 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1300 | cmn_err(CE_NOTE, | |
1301 | "xfs_inactive: xfs_ifree() returned an error = %d on %s", | |
1302 | error, mp->m_fsname); | |
7d04a335 | 1303 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
1304 | } |
1305 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
1306 | } else { | |
1307 | /* | |
1308 | * Credit the quota account(s). The inode is gone. | |
1309 | */ | |
1310 | XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_ICOUNT, -1); | |
1311 | ||
1312 | /* | |
78e9da77 DC |
1313 | * Just ignore errors at this point. There is nothing we can |
1314 | * do except to try to keep going. Make sure it's not a silent | |
1315 | * error. | |
1da177e4 | 1316 | */ |
78e9da77 DC |
1317 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1318 | if (error) | |
1319 | xfs_fs_cmn_err(CE_NOTE, mp, "xfs_inactive: " | |
1320 | "xfs_bmap_finish() returned error %d", error); | |
1321 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
1322 | if (error) | |
1323 | xfs_fs_cmn_err(CE_NOTE, mp, "xfs_inactive: " | |
1324 | "xfs_trans_commit() returned error %d", error); | |
1da177e4 LT |
1325 | } |
1326 | /* | |
1327 | * Release the dquots held by inode, if any. | |
1328 | */ | |
1329 | XFS_QM_DQDETACH(mp, ip); | |
1330 | ||
1331 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1332 | ||
1333 | out: | |
1334 | return VN_INACTIVE_CACHE; | |
1335 | } | |
1336 | ||
384f3ced BN |
1337 | /* |
1338 | * Lookups up an inode from "name". If ci_name is not NULL, then a CI match | |
1339 | * is allowed, otherwise it has to be an exact match. If a CI match is found, | |
1340 | * ci_name->name will point to a the actual name (caller must free) or | |
1341 | * will be set to NULL if an exact match is found. | |
1342 | */ | |
993386c1 | 1343 | int |
1da177e4 | 1344 | xfs_lookup( |
993386c1 | 1345 | xfs_inode_t *dp, |
556b8b16 | 1346 | struct xfs_name *name, |
384f3ced BN |
1347 | xfs_inode_t **ipp, |
1348 | struct xfs_name *ci_name) | |
1da177e4 | 1349 | { |
eca450b7 | 1350 | xfs_ino_t inum; |
1da177e4 LT |
1351 | int error; |
1352 | uint lock_mode; | |
1da177e4 | 1353 | |
cf441eeb | 1354 | xfs_itrace_entry(dp); |
1da177e4 LT |
1355 | |
1356 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
1357 | return XFS_ERROR(EIO); | |
1358 | ||
1359 | lock_mode = xfs_ilock_map_shared(dp); | |
384f3ced | 1360 | error = xfs_dir_lookup(NULL, dp, name, &inum, ci_name); |
1da177e4 | 1361 | xfs_iunlock_map_shared(dp, lock_mode); |
eca450b7 CH |
1362 | |
1363 | if (error) | |
1364 | goto out; | |
1365 | ||
1366 | error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp, 0); | |
1367 | if (error) | |
384f3ced | 1368 | goto out_free_name; |
eca450b7 CH |
1369 | |
1370 | xfs_itrace_ref(*ipp); | |
1371 | return 0; | |
1372 | ||
384f3ced BN |
1373 | out_free_name: |
1374 | if (ci_name) | |
1375 | kmem_free(ci_name->name); | |
1376 | out: | |
eca450b7 | 1377 | *ipp = NULL; |
1da177e4 LT |
1378 | return error; |
1379 | } | |
1380 | ||
993386c1 | 1381 | int |
1da177e4 | 1382 | xfs_create( |
993386c1 | 1383 | xfs_inode_t *dp, |
556b8b16 | 1384 | struct xfs_name *name, |
3e5daf05 CH |
1385 | mode_t mode, |
1386 | xfs_dev_t rdev, | |
979ebab1 | 1387 | xfs_inode_t **ipp, |
1da177e4 LT |
1388 | cred_t *credp) |
1389 | { | |
517b5e8c CH |
1390 | int is_dir = S_ISDIR(mode); |
1391 | struct xfs_mount *mp = dp->i_mount; | |
1392 | struct xfs_inode *ip = NULL; | |
1393 | struct xfs_trans *tp = NULL; | |
556b8b16 | 1394 | int error; |
1da177e4 LT |
1395 | xfs_bmap_free_t free_list; |
1396 | xfs_fsblock_t first_block; | |
993386c1 | 1397 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
1398 | uint cancel_flags; |
1399 | int committed; | |
1400 | xfs_prid_t prid; | |
517b5e8c CH |
1401 | struct xfs_dquot *udqp = NULL; |
1402 | struct xfs_dquot *gdqp = NULL; | |
1da177e4 | 1403 | uint resblks; |
517b5e8c CH |
1404 | uint log_res; |
1405 | uint log_count; | |
1da177e4 | 1406 | |
cf441eeb | 1407 | xfs_itrace_entry(dp); |
1da177e4 | 1408 | |
517b5e8c CH |
1409 | if (XFS_FORCED_SHUTDOWN(mp)) |
1410 | return XFS_ERROR(EIO); | |
1411 | ||
eb9df39d | 1412 | if (DM_EVENT_ENABLED(dp, DM_EVENT_CREATE)) { |
1da177e4 | 1413 | error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, |
bc4ac74a | 1414 | dp, DM_RIGHT_NULL, NULL, |
556b8b16 | 1415 | DM_RIGHT_NULL, name->name, NULL, |
3e5daf05 | 1416 | mode, 0, 0); |
1da177e4 LT |
1417 | |
1418 | if (error) | |
1419 | return error; | |
1da177e4 LT |
1420 | } |
1421 | ||
365ca83d NS |
1422 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
1423 | prid = dp->i_d.di_projid; | |
1da177e4 | 1424 | else |
517b5e8c | 1425 | prid = dfltprid; |
1da177e4 LT |
1426 | |
1427 | /* | |
1428 | * Make sure that we have allocated dquot(s) on disk. | |
1429 | */ | |
1430 | error = XFS_QM_DQVOPALLOC(mp, dp, | |
9e2b2dc4 | 1431 | current_fsuid(), current_fsgid(), prid, |
517b5e8c | 1432 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1da177e4 LT |
1433 | if (error) |
1434 | goto std_return; | |
1435 | ||
517b5e8c CH |
1436 | if (is_dir) { |
1437 | rdev = 0; | |
1438 | resblks = XFS_MKDIR_SPACE_RES(mp, name->len); | |
1439 | log_res = XFS_MKDIR_LOG_RES(mp); | |
1440 | log_count = XFS_MKDIR_LOG_COUNT; | |
1441 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); | |
1442 | } else { | |
1443 | resblks = XFS_CREATE_SPACE_RES(mp, name->len); | |
1444 | log_res = XFS_CREATE_LOG_RES(mp); | |
1445 | log_count = XFS_CREATE_LOG_COUNT; | |
1446 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); | |
1447 | } | |
1da177e4 | 1448 | |
1da177e4 | 1449 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
517b5e8c | 1450 | |
1da177e4 LT |
1451 | /* |
1452 | * Initially assume that the file does not exist and | |
1453 | * reserve the resources for that case. If that is not | |
1454 | * the case we'll drop the one we have and get a more | |
1455 | * appropriate transaction later. | |
1456 | */ | |
517b5e8c CH |
1457 | error = xfs_trans_reserve(tp, resblks, log_res, 0, |
1458 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 | 1459 | if (error == ENOSPC) { |
153fec43 DC |
1460 | /* flush outstanding delalloc blocks and retry */ |
1461 | xfs_flush_inodes(dp); | |
1462 | error = xfs_trans_reserve(tp, resblks, XFS_CREATE_LOG_RES(mp), 0, | |
1463 | XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT); | |
1464 | } | |
1465 | if (error == ENOSPC) { | |
1466 | /* No space at all so try a "no-allocation" reservation */ | |
1da177e4 | 1467 | resblks = 0; |
517b5e8c CH |
1468 | error = xfs_trans_reserve(tp, 0, log_res, 0, |
1469 | XFS_TRANS_PERM_LOG_RES, log_count); | |
1da177e4 LT |
1470 | } |
1471 | if (error) { | |
1472 | cancel_flags = 0; | |
517b5e8c | 1473 | goto out_trans_cancel; |
1da177e4 LT |
1474 | } |
1475 | ||
f7c66ce3 | 1476 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 1477 | unlock_dp_on_error = B_TRUE; |
1da177e4 | 1478 | |
517b5e8c CH |
1479 | /* |
1480 | * Check for directory link count overflow. | |
1481 | */ | |
1482 | if (is_dir && dp->i_d.di_nlink >= XFS_MAXLINK) { | |
1483 | error = XFS_ERROR(EMLINK); | |
1484 | goto out_trans_cancel; | |
1485 | } | |
1da177e4 | 1486 | |
517b5e8c | 1487 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
1488 | |
1489 | /* | |
1490 | * Reserve disk quota and the inode. | |
1491 | */ | |
1492 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); | |
1493 | if (error) | |
517b5e8c | 1494 | goto out_trans_cancel; |
1da177e4 | 1495 | |
556b8b16 BN |
1496 | error = xfs_dir_canenter(tp, dp, name, resblks); |
1497 | if (error) | |
517b5e8c CH |
1498 | goto out_trans_cancel; |
1499 | ||
1500 | /* | |
1501 | * A newly created regular or special file just has one directory | |
1502 | * entry pointing to them, but a directory also the "." entry | |
1503 | * pointing to itself. | |
1504 | */ | |
1505 | error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, credp, | |
1506 | prid, resblks > 0, &ip, &committed); | |
1da177e4 LT |
1507 | if (error) { |
1508 | if (error == ENOSPC) | |
517b5e8c CH |
1509 | goto out_trans_cancel; |
1510 | goto out_trans_abort; | |
1da177e4 | 1511 | } |
1da177e4 LT |
1512 | |
1513 | /* | |
1514 | * At this point, we've gotten a newly allocated inode. | |
1515 | * It is locked (and joined to the transaction). | |
1516 | */ | |
517b5e8c | 1517 | xfs_itrace_ref(ip); |
579aa9ca | 1518 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
1519 | |
1520 | /* | |
993386c1 CH |
1521 | * Now we join the directory inode to the transaction. We do not do it |
1522 | * earlier because xfs_dir_ialloc might commit the previous transaction | |
1523 | * (and release all the locks). An error from here on will result in | |
1524 | * the transaction cancel unlocking dp so don't do it explicitly in the | |
1525 | * error path. | |
1da177e4 | 1526 | */ |
979ebab1 | 1527 | IHOLD(dp); |
1da177e4 | 1528 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 1529 | unlock_dp_on_error = B_FALSE; |
1da177e4 | 1530 | |
556b8b16 | 1531 | error = xfs_dir_createname(tp, dp, name, ip->i_ino, |
f6c2d1fa NS |
1532 | &first_block, &free_list, resblks ? |
1533 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
1534 | if (error) { |
1535 | ASSERT(error != ENOSPC); | |
517b5e8c | 1536 | goto out_trans_abort; |
1da177e4 LT |
1537 | } |
1538 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1539 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1540 | ||
517b5e8c CH |
1541 | if (is_dir) { |
1542 | error = xfs_dir_init(tp, ip, dp); | |
1543 | if (error) | |
1544 | goto out_bmap_cancel; | |
1545 | ||
1546 | error = xfs_bumplink(tp, dp); | |
1547 | if (error) | |
1548 | goto out_bmap_cancel; | |
1549 | } | |
1550 | ||
1da177e4 LT |
1551 | /* |
1552 | * If this is a synchronous mount, make sure that the | |
1553 | * create transaction goes to disk before returning to | |
1554 | * the user. | |
1555 | */ | |
517b5e8c | 1556 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 1557 | xfs_trans_set_sync(tp); |
1da177e4 | 1558 | |
1da177e4 LT |
1559 | /* |
1560 | * Attach the dquot(s) to the inodes and modify them incore. | |
1561 | * These ids of the inode couldn't have changed since the new | |
1562 | * inode has been locked ever since it was created. | |
1563 | */ | |
1564 | XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp); | |
1565 | ||
1566 | /* | |
1567 | * xfs_trans_commit normally decrements the vnode ref count | |
1568 | * when it unlocks the inode. Since we want to return the | |
1569 | * vnode to the caller, we bump the vnode ref count now. | |
1570 | */ | |
1571 | IHOLD(ip); | |
1da177e4 | 1572 | |
f7c99b6f | 1573 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
517b5e8c CH |
1574 | if (error) |
1575 | goto out_abort_rele; | |
1da177e4 | 1576 | |
1c72bf90 | 1577 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1578 | if (error) { |
1579 | IRELE(ip); | |
517b5e8c | 1580 | goto out_dqrele; |
1da177e4 LT |
1581 | } |
1582 | ||
1583 | XFS_QM_DQRELE(mp, udqp); | |
1584 | XFS_QM_DQRELE(mp, gdqp); | |
1585 | ||
979ebab1 | 1586 | *ipp = ip; |
1da177e4 LT |
1587 | |
1588 | /* Fallthrough to std_return with error = 0 */ | |
517b5e8c CH |
1589 | std_return: |
1590 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTCREATE)) { | |
1591 | XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, dp, DM_RIGHT_NULL, | |
1592 | ip, DM_RIGHT_NULL, name->name, NULL, mode, | |
1593 | error, 0); | |
1da177e4 | 1594 | } |
517b5e8c | 1595 | |
1da177e4 LT |
1596 | return error; |
1597 | ||
517b5e8c CH |
1598 | out_bmap_cancel: |
1599 | xfs_bmap_cancel(&free_list); | |
1600 | out_trans_abort: | |
1da177e4 | 1601 | cancel_flags |= XFS_TRANS_ABORT; |
517b5e8c CH |
1602 | out_trans_cancel: |
1603 | xfs_trans_cancel(tp, cancel_flags); | |
1604 | out_dqrele: | |
1da177e4 LT |
1605 | XFS_QM_DQRELE(mp, udqp); |
1606 | XFS_QM_DQRELE(mp, gdqp); | |
1607 | ||
993386c1 CH |
1608 | if (unlock_dp_on_error) |
1609 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
1610 | ||
1da177e4 LT |
1611 | goto std_return; |
1612 | ||
517b5e8c | 1613 | out_abort_rele: |
1da177e4 LT |
1614 | /* |
1615 | * Wait until after the current transaction is aborted to | |
1616 | * release the inode. This prevents recursive transactions | |
1617 | * and deadlocks from xfs_inactive. | |
1618 | */ | |
517b5e8c | 1619 | xfs_bmap_cancel(&free_list); |
1da177e4 LT |
1620 | cancel_flags |= XFS_TRANS_ABORT; |
1621 | xfs_trans_cancel(tp, cancel_flags); | |
1622 | IRELE(ip); | |
517b5e8c CH |
1623 | unlock_dp_on_error = B_FALSE; |
1624 | goto out_dqrele; | |
1da177e4 LT |
1625 | } |
1626 | ||
1da177e4 LT |
1627 | #ifdef DEBUG |
1628 | int xfs_locked_n; | |
1629 | int xfs_small_retries; | |
1630 | int xfs_middle_retries; | |
1631 | int xfs_lots_retries; | |
1632 | int xfs_lock_delays; | |
1633 | #endif | |
1634 | ||
f7c66ce3 LM |
1635 | /* |
1636 | * Bump the subclass so xfs_lock_inodes() acquires each lock with | |
1637 | * a different value | |
1638 | */ | |
1639 | static inline int | |
1640 | xfs_lock_inumorder(int lock_mode, int subclass) | |
1641 | { | |
1642 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) | |
0f1145cc | 1643 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT; |
f7c66ce3 | 1644 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) |
0f1145cc | 1645 | lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT; |
f7c66ce3 LM |
1646 | |
1647 | return lock_mode; | |
1648 | } | |
1649 | ||
1da177e4 LT |
1650 | /* |
1651 | * The following routine will lock n inodes in exclusive mode. | |
1652 | * We assume the caller calls us with the inodes in i_ino order. | |
1653 | * | |
1654 | * We need to detect deadlock where an inode that we lock | |
1655 | * is in the AIL and we start waiting for another inode that is locked | |
1656 | * by a thread in a long running transaction (such as truncate). This can | |
1657 | * result in deadlock since the long running trans might need to wait | |
1658 | * for the inode we just locked in order to push the tail and free space | |
1659 | * in the log. | |
1660 | */ | |
1661 | void | |
1662 | xfs_lock_inodes( | |
1663 | xfs_inode_t **ips, | |
1664 | int inodes, | |
1da177e4 LT |
1665 | uint lock_mode) |
1666 | { | |
1667 | int attempts = 0, i, j, try_lock; | |
1668 | xfs_log_item_t *lp; | |
1669 | ||
1670 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ | |
1671 | ||
cfa853e4 CH |
1672 | try_lock = 0; |
1673 | i = 0; | |
1da177e4 LT |
1674 | |
1675 | again: | |
1676 | for (; i < inodes; i++) { | |
1677 | ASSERT(ips[i]); | |
1678 | ||
1679 | if (i && (ips[i] == ips[i-1])) /* Already locked */ | |
1680 | continue; | |
1681 | ||
1682 | /* | |
1683 | * If try_lock is not set yet, make sure all locked inodes | |
1684 | * are not in the AIL. | |
1685 | * If any are, set try_lock to be used later. | |
1686 | */ | |
1687 | ||
1688 | if (!try_lock) { | |
1689 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
1690 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
1691 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1692 | try_lock++; | |
1693 | } | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | /* | |
1698 | * If any of the previous locks we have locked is in the AIL, | |
1699 | * we must TRY to get the second and subsequent locks. If | |
1700 | * we can't get any, we must release all we have | |
1701 | * and try again. | |
1702 | */ | |
1703 | ||
1704 | if (try_lock) { | |
1705 | /* try_lock must be 0 if i is 0. */ | |
1706 | /* | |
1707 | * try_lock means we have an inode locked | |
1708 | * that is in the AIL. | |
1709 | */ | |
1710 | ASSERT(i != 0); | |
f7c66ce3 | 1711 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
1da177e4 LT |
1712 | attempts++; |
1713 | ||
1714 | /* | |
1715 | * Unlock all previous guys and try again. | |
1716 | * xfs_iunlock will try to push the tail | |
1717 | * if the inode is in the AIL. | |
1718 | */ | |
1719 | ||
1720 | for(j = i - 1; j >= 0; j--) { | |
1721 | ||
1722 | /* | |
1723 | * Check to see if we've already | |
1724 | * unlocked this one. | |
1725 | * Not the first one going back, | |
1726 | * and the inode ptr is the same. | |
1727 | */ | |
1728 | if ((j != (i - 1)) && ips[j] == | |
1729 | ips[j+1]) | |
1730 | continue; | |
1731 | ||
1732 | xfs_iunlock(ips[j], lock_mode); | |
1733 | } | |
1734 | ||
1735 | if ((attempts % 5) == 0) { | |
1736 | delay(1); /* Don't just spin the CPU */ | |
1737 | #ifdef DEBUG | |
1738 | xfs_lock_delays++; | |
1739 | #endif | |
1740 | } | |
1741 | i = 0; | |
1742 | try_lock = 0; | |
1743 | goto again; | |
1744 | } | |
1745 | } else { | |
f7c66ce3 | 1746 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
1da177e4 LT |
1747 | } |
1748 | } | |
1749 | ||
1750 | #ifdef DEBUG | |
1751 | if (attempts) { | |
1752 | if (attempts < 5) xfs_small_retries++; | |
1753 | else if (attempts < 100) xfs_middle_retries++; | |
1754 | else xfs_lots_retries++; | |
1755 | } else { | |
1756 | xfs_locked_n++; | |
1757 | } | |
1758 | #endif | |
1759 | } | |
1760 | ||
f9114eba DC |
1761 | /* |
1762 | * xfs_lock_two_inodes() can only be used to lock one type of lock | |
1763 | * at a time - the iolock or the ilock, but not both at once. If | |
1764 | * we lock both at once, lockdep will report false positives saying | |
1765 | * we have violated locking orders. | |
1766 | */ | |
e1cccd91 CH |
1767 | void |
1768 | xfs_lock_two_inodes( | |
1769 | xfs_inode_t *ip0, | |
1770 | xfs_inode_t *ip1, | |
1771 | uint lock_mode) | |
1772 | { | |
1773 | xfs_inode_t *temp; | |
1774 | int attempts = 0; | |
1775 | xfs_log_item_t *lp; | |
1776 | ||
f9114eba DC |
1777 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) |
1778 | ASSERT((lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) == 0); | |
e1cccd91 CH |
1779 | ASSERT(ip0->i_ino != ip1->i_ino); |
1780 | ||
1781 | if (ip0->i_ino > ip1->i_ino) { | |
1782 | temp = ip0; | |
1783 | ip0 = ip1; | |
1784 | ip1 = temp; | |
1785 | } | |
1786 | ||
1787 | again: | |
1788 | xfs_ilock(ip0, xfs_lock_inumorder(lock_mode, 0)); | |
1789 | ||
1790 | /* | |
1791 | * If the first lock we have locked is in the AIL, we must TRY to get | |
1792 | * the second lock. If we can't get it, we must release the first one | |
1793 | * and try again. | |
1794 | */ | |
1795 | lp = (xfs_log_item_t *)ip0->i_itemp; | |
1796 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
1797 | if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { | |
1798 | xfs_iunlock(ip0, lock_mode); | |
1799 | if ((++attempts % 5) == 0) | |
1800 | delay(1); /* Don't just spin the CPU */ | |
1801 | goto again; | |
1802 | } | |
1803 | } else { | |
1804 | xfs_ilock(ip1, xfs_lock_inumorder(lock_mode, 1)); | |
1805 | } | |
1806 | } | |
1807 | ||
993386c1 | 1808 | int |
1da177e4 | 1809 | xfs_remove( |
993386c1 | 1810 | xfs_inode_t *dp, |
556b8b16 BN |
1811 | struct xfs_name *name, |
1812 | xfs_inode_t *ip) | |
1da177e4 | 1813 | { |
993386c1 | 1814 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 1815 | xfs_trans_t *tp = NULL; |
8f112e3b | 1816 | int is_dir = S_ISDIR(ip->i_d.di_mode); |
1da177e4 LT |
1817 | int error = 0; |
1818 | xfs_bmap_free_t free_list; | |
1819 | xfs_fsblock_t first_block; | |
1820 | int cancel_flags; | |
1821 | int committed; | |
1da177e4 LT |
1822 | int link_zero; |
1823 | uint resblks; | |
8f112e3b | 1824 | uint log_count; |
1da177e4 | 1825 | |
cf441eeb | 1826 | xfs_itrace_entry(dp); |
8f112e3b | 1827 | xfs_itrace_entry(ip); |
1da177e4 | 1828 | |
1da177e4 LT |
1829 | if (XFS_FORCED_SHUTDOWN(mp)) |
1830 | return XFS_ERROR(EIO); | |
1831 | ||
eb9df39d | 1832 | if (DM_EVENT_ENABLED(dp, DM_EVENT_REMOVE)) { |
556b8b16 BN |
1833 | error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dp, DM_RIGHT_NULL, |
1834 | NULL, DM_RIGHT_NULL, name->name, NULL, | |
1835 | ip->i_d.di_mode, 0, 0); | |
1da177e4 LT |
1836 | if (error) |
1837 | return error; | |
1838 | } | |
1839 | ||
1da177e4 | 1840 | error = XFS_QM_DQATTACH(mp, dp, 0); |
8f112e3b CH |
1841 | if (error) |
1842 | goto std_return; | |
1843 | ||
1844 | error = XFS_QM_DQATTACH(mp, ip, 0); | |
1845 | if (error) | |
1da177e4 | 1846 | goto std_return; |
1da177e4 | 1847 | |
8f112e3b CH |
1848 | if (is_dir) { |
1849 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); | |
1850 | log_count = XFS_DEFAULT_LOG_COUNT; | |
1851 | } else { | |
1852 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); | |
1853 | log_count = XFS_REMOVE_LOG_COUNT; | |
1854 | } | |
1da177e4 | 1855 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
8f112e3b | 1856 | |
1da177e4 LT |
1857 | /* |
1858 | * We try to get the real space reservation first, | |
1859 | * allowing for directory btree deletion(s) implying | |
1860 | * possible bmap insert(s). If we can't get the space | |
1861 | * reservation then we use 0 instead, and avoid the bmap | |
1862 | * btree insert(s) in the directory code by, if the bmap | |
1863 | * insert tries to happen, instead trimming the LAST | |
1864 | * block from the directory. | |
1865 | */ | |
1866 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
1867 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1868 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1869 | if (error == ENOSPC) { |
1870 | resblks = 0; | |
1871 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
8f112e3b | 1872 | XFS_TRANS_PERM_LOG_RES, log_count); |
1da177e4 LT |
1873 | } |
1874 | if (error) { | |
1875 | ASSERT(error != ENOSPC); | |
8f112e3b CH |
1876 | cancel_flags = 0; |
1877 | goto out_trans_cancel; | |
1da177e4 LT |
1878 | } |
1879 | ||
e1cccd91 | 1880 | xfs_lock_two_inodes(dp, ip, XFS_ILOCK_EXCL); |
1da177e4 LT |
1881 | |
1882 | /* | |
1883 | * At this point, we've gotten both the directory and the entry | |
1884 | * inodes locked. | |
1885 | */ | |
5df78e73 | 1886 | IHOLD(ip); |
1da177e4 | 1887 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
82dab941 CH |
1888 | |
1889 | IHOLD(dp); | |
1890 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
1da177e4 | 1891 | |
8f112e3b CH |
1892 | /* |
1893 | * If we're removing a directory perform some additional validation. | |
1894 | */ | |
1895 | if (is_dir) { | |
1896 | ASSERT(ip->i_d.di_nlink >= 2); | |
1897 | if (ip->i_d.di_nlink != 2) { | |
1898 | error = XFS_ERROR(ENOTEMPTY); | |
1899 | goto out_trans_cancel; | |
1900 | } | |
1901 | if (!xfs_dir_isempty(ip)) { | |
1902 | error = XFS_ERROR(ENOTEMPTY); | |
1903 | goto out_trans_cancel; | |
1904 | } | |
1905 | } | |
1906 | ||
9d87c319 | 1907 | xfs_bmap_init(&free_list, &first_block); |
556b8b16 | 1908 | error = xfs_dir_removename(tp, dp, name, ip->i_ino, |
d4377d84 | 1909 | &first_block, &free_list, resblks); |
1da177e4 LT |
1910 | if (error) { |
1911 | ASSERT(error != ENOENT); | |
8f112e3b | 1912 | goto out_bmap_cancel; |
1da177e4 LT |
1913 | } |
1914 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1915 | ||
8f112e3b CH |
1916 | if (is_dir) { |
1917 | /* | |
1918 | * Drop the link from ip's "..". | |
1919 | */ | |
1920 | error = xfs_droplink(tp, dp); | |
1921 | if (error) | |
1922 | goto out_bmap_cancel; | |
1923 | ||
1924 | /* | |
2b7035fd | 1925 | * Drop the "." link from ip to self. |
8f112e3b CH |
1926 | */ |
1927 | error = xfs_droplink(tp, ip); | |
1928 | if (error) | |
1929 | goto out_bmap_cancel; | |
1930 | } else { | |
1931 | /* | |
1932 | * When removing a non-directory we need to log the parent | |
26c52951 DC |
1933 | * inode here. For a directory this is done implicitly |
1934 | * by the xfs_droplink call for the ".." entry. | |
8f112e3b CH |
1935 | */ |
1936 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
1da177e4 LT |
1937 | } |
1938 | ||
8f112e3b | 1939 | /* |
2b7035fd | 1940 | * Drop the link from dp to ip. |
8f112e3b CH |
1941 | */ |
1942 | error = xfs_droplink(tp, ip); | |
1943 | if (error) | |
1944 | goto out_bmap_cancel; | |
1945 | ||
1946 | /* | |
1947 | * Determine if this is the last link while | |
1da177e4 LT |
1948 | * we are in the transaction. |
1949 | */ | |
8f112e3b | 1950 | link_zero = (ip->i_d.di_nlink == 0); |
1da177e4 | 1951 | |
1da177e4 LT |
1952 | /* |
1953 | * If this is a synchronous mount, make sure that the | |
1954 | * remove transaction goes to disk before returning to | |
1955 | * the user. | |
1956 | */ | |
8f112e3b | 1957 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) |
1da177e4 | 1958 | xfs_trans_set_sync(tp); |
1da177e4 | 1959 | |
f7c99b6f | 1960 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
8f112e3b CH |
1961 | if (error) |
1962 | goto out_bmap_cancel; | |
1da177e4 | 1963 | |
1c72bf90 | 1964 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
5df78e73 | 1965 | if (error) |
1da177e4 | 1966 | goto std_return; |
1da177e4 | 1967 | |
2a82b8be DC |
1968 | /* |
1969 | * If we are using filestreams, kill the stream association. | |
1970 | * If the file is still open it may get a new one but that | |
1971 | * will get killed on last close in xfs_close() so we don't | |
1972 | * have to worry about that. | |
1973 | */ | |
8f112e3b | 1974 | if (!is_dir && link_zero && xfs_inode_is_filestream(ip)) |
2a82b8be DC |
1975 | xfs_filestream_deassociate(ip); |
1976 | ||
cf441eeb | 1977 | xfs_itrace_exit(ip); |
8f112e3b | 1978 | xfs_itrace_exit(dp); |
1da177e4 | 1979 | |
1da177e4 | 1980 | std_return: |
eb9df39d | 1981 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTREMOVE)) { |
8f112e3b CH |
1982 | XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE, dp, DM_RIGHT_NULL, |
1983 | NULL, DM_RIGHT_NULL, name->name, NULL, | |
1984 | ip->i_d.di_mode, error, 0); | |
1da177e4 | 1985 | } |
8f112e3b | 1986 | |
1da177e4 LT |
1987 | return error; |
1988 | ||
8f112e3b | 1989 | out_bmap_cancel: |
1da177e4 LT |
1990 | xfs_bmap_cancel(&free_list); |
1991 | cancel_flags |= XFS_TRANS_ABORT; | |
8f112e3b | 1992 | out_trans_cancel: |
1da177e4 LT |
1993 | xfs_trans_cancel(tp, cancel_flags); |
1994 | goto std_return; | |
1da177e4 LT |
1995 | } |
1996 | ||
993386c1 | 1997 | int |
1da177e4 | 1998 | xfs_link( |
993386c1 | 1999 | xfs_inode_t *tdp, |
a3da7896 | 2000 | xfs_inode_t *sip, |
556b8b16 | 2001 | struct xfs_name *target_name) |
1da177e4 | 2002 | { |
993386c1 | 2003 | xfs_mount_t *mp = tdp->i_mount; |
1da177e4 | 2004 | xfs_trans_t *tp; |
1da177e4 LT |
2005 | int error; |
2006 | xfs_bmap_free_t free_list; | |
2007 | xfs_fsblock_t first_block; | |
2008 | int cancel_flags; | |
2009 | int committed; | |
1da177e4 | 2010 | int resblks; |
1da177e4 | 2011 | |
cf441eeb | 2012 | xfs_itrace_entry(tdp); |
a3da7896 | 2013 | xfs_itrace_entry(sip); |
1da177e4 | 2014 | |
a3da7896 | 2015 | ASSERT(!S_ISDIR(sip->i_d.di_mode)); |
1da177e4 | 2016 | |
1da177e4 LT |
2017 | if (XFS_FORCED_SHUTDOWN(mp)) |
2018 | return XFS_ERROR(EIO); | |
2019 | ||
eb9df39d | 2020 | if (DM_EVENT_ENABLED(tdp, DM_EVENT_LINK)) { |
1da177e4 | 2021 | error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK, |
bc4ac74a CH |
2022 | tdp, DM_RIGHT_NULL, |
2023 | sip, DM_RIGHT_NULL, | |
556b8b16 | 2024 | target_name->name, NULL, 0, 0, 0); |
1da177e4 LT |
2025 | if (error) |
2026 | return error; | |
2027 | } | |
2028 | ||
2029 | /* Return through std_return after this point. */ | |
2030 | ||
2031 | error = XFS_QM_DQATTACH(mp, sip, 0); | |
cb3f35bb CH |
2032 | if (error) |
2033 | goto std_return; | |
2034 | ||
2035 | error = XFS_QM_DQATTACH(mp, tdp, 0); | |
1da177e4 LT |
2036 | if (error) |
2037 | goto std_return; | |
2038 | ||
2039 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); | |
2040 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
556b8b16 | 2041 | resblks = XFS_LINK_SPACE_RES(mp, target_name->len); |
1da177e4 LT |
2042 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
2043 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
2044 | if (error == ENOSPC) { | |
2045 | resblks = 0; | |
2046 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, | |
2047 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
2048 | } | |
2049 | if (error) { | |
2050 | cancel_flags = 0; | |
2051 | goto error_return; | |
2052 | } | |
2053 | ||
e1cccd91 | 2054 | xfs_lock_two_inodes(sip, tdp, XFS_ILOCK_EXCL); |
1da177e4 LT |
2055 | |
2056 | /* | |
2057 | * Increment vnode ref counts since xfs_trans_commit & | |
2058 | * xfs_trans_cancel will both unlock the inodes and | |
2059 | * decrement the associated ref counts. | |
2060 | */ | |
a3da7896 CH |
2061 | IHOLD(sip); |
2062 | IHOLD(tdp); | |
1da177e4 LT |
2063 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); |
2064 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); | |
2065 | ||
2066 | /* | |
2067 | * If the source has too many links, we can't make any more to it. | |
2068 | */ | |
2069 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { | |
2070 | error = XFS_ERROR(EMLINK); | |
2071 | goto error_return; | |
2072 | } | |
2073 | ||
365ca83d NS |
2074 | /* |
2075 | * If we are using project inheritance, we only allow hard link | |
2076 | * creation in our tree when the project IDs are the same; else | |
2077 | * the tree quota mechanism could be circumvented. | |
2078 | */ | |
2079 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
2080 | (tdp->i_d.di_projid != sip->i_d.di_projid))) { | |
b1ecdda9 | 2081 | error = XFS_ERROR(EXDEV); |
365ca83d NS |
2082 | goto error_return; |
2083 | } | |
2084 | ||
556b8b16 BN |
2085 | error = xfs_dir_canenter(tp, tdp, target_name, resblks); |
2086 | if (error) | |
1da177e4 LT |
2087 | goto error_return; |
2088 | ||
9d87c319 | 2089 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 | 2090 | |
556b8b16 BN |
2091 | error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino, |
2092 | &first_block, &free_list, resblks); | |
1da177e4 LT |
2093 | if (error) |
2094 | goto abort_return; | |
2095 | xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
1da177e4 LT |
2096 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
2097 | ||
2098 | error = xfs_bumplink(tp, sip); | |
b71d300c | 2099 | if (error) |
1da177e4 | 2100 | goto abort_return; |
1da177e4 LT |
2101 | |
2102 | /* | |
2103 | * If this is a synchronous mount, make sure that the | |
2104 | * link transaction goes to disk before returning to | |
2105 | * the user. | |
2106 | */ | |
2107 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2108 | xfs_trans_set_sync(tp); | |
2109 | } | |
2110 | ||
f7c99b6f | 2111 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
2112 | if (error) { |
2113 | xfs_bmap_cancel(&free_list); | |
2114 | goto abort_return; | |
2115 | } | |
2116 | ||
1c72bf90 | 2117 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
b71d300c | 2118 | if (error) |
1da177e4 | 2119 | goto std_return; |
1da177e4 LT |
2120 | |
2121 | /* Fall through to std_return with error = 0. */ | |
2122 | std_return: | |
eb9df39d | 2123 | if (DM_EVENT_ENABLED(sip, DM_EVENT_POSTLINK)) { |
1da177e4 | 2124 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK, |
bc4ac74a CH |
2125 | tdp, DM_RIGHT_NULL, |
2126 | sip, DM_RIGHT_NULL, | |
556b8b16 | 2127 | target_name->name, NULL, 0, error, 0); |
1da177e4 LT |
2128 | } |
2129 | return error; | |
2130 | ||
2131 | abort_return: | |
2132 | cancel_flags |= XFS_TRANS_ABORT; | |
2133 | /* FALLTHROUGH */ | |
014c2544 | 2134 | |
1da177e4 LT |
2135 | error_return: |
2136 | xfs_trans_cancel(tp, cancel_flags); | |
1da177e4 LT |
2137 | goto std_return; |
2138 | } | |
b71d300c | 2139 | |
993386c1 | 2140 | int |
1da177e4 | 2141 | xfs_symlink( |
993386c1 | 2142 | xfs_inode_t *dp, |
556b8b16 BN |
2143 | struct xfs_name *link_name, |
2144 | const char *target_path, | |
3e5daf05 | 2145 | mode_t mode, |
3937be5b | 2146 | xfs_inode_t **ipp, |
1da177e4 LT |
2147 | cred_t *credp) |
2148 | { | |
993386c1 | 2149 | xfs_mount_t *mp = dp->i_mount; |
1da177e4 | 2150 | xfs_trans_t *tp; |
1da177e4 LT |
2151 | xfs_inode_t *ip; |
2152 | int error; | |
2153 | int pathlen; | |
2154 | xfs_bmap_free_t free_list; | |
2155 | xfs_fsblock_t first_block; | |
993386c1 | 2156 | boolean_t unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
2157 | uint cancel_flags; |
2158 | int committed; | |
2159 | xfs_fileoff_t first_fsb; | |
2160 | xfs_filblks_t fs_blocks; | |
2161 | int nmaps; | |
2162 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
2163 | xfs_daddr_t d; | |
556b8b16 | 2164 | const char *cur_chunk; |
1da177e4 LT |
2165 | int byte_cnt; |
2166 | int n; | |
2167 | xfs_buf_t *bp; | |
2168 | xfs_prid_t prid; | |
2169 | struct xfs_dquot *udqp, *gdqp; | |
2170 | uint resblks; | |
1da177e4 | 2171 | |
3937be5b | 2172 | *ipp = NULL; |
1da177e4 LT |
2173 | error = 0; |
2174 | ip = NULL; | |
2175 | tp = NULL; | |
2176 | ||
cf441eeb | 2177 | xfs_itrace_entry(dp); |
1da177e4 LT |
2178 | |
2179 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2180 | return XFS_ERROR(EIO); | |
2181 | ||
1da177e4 LT |
2182 | /* |
2183 | * Check component lengths of the target path name. | |
2184 | */ | |
2185 | pathlen = strlen(target_path); | |
2186 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
2187 | return XFS_ERROR(ENAMETOOLONG); | |
1da177e4 | 2188 | |
eb9df39d | 2189 | if (DM_EVENT_ENABLED(dp, DM_EVENT_SYMLINK)) { |
bc4ac74a | 2190 | error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dp, |
1da177e4 | 2191 | DM_RIGHT_NULL, NULL, DM_RIGHT_NULL, |
556b8b16 | 2192 | link_name->name, target_path, 0, 0, 0); |
1da177e4 LT |
2193 | if (error) |
2194 | return error; | |
2195 | } | |
2196 | ||
2197 | /* Return through std_return after this point. */ | |
2198 | ||
2199 | udqp = gdqp = NULL; | |
365ca83d NS |
2200 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
2201 | prid = dp->i_d.di_projid; | |
1da177e4 LT |
2202 | else |
2203 | prid = (xfs_prid_t)dfltprid; | |
2204 | ||
2205 | /* | |
2206 | * Make sure that we have allocated dquot(s) on disk. | |
2207 | */ | |
2208 | error = XFS_QM_DQVOPALLOC(mp, dp, | |
9e2b2dc4 | 2209 | current_fsuid(), current_fsgid(), prid, |
1da177e4 LT |
2210 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
2211 | if (error) | |
2212 | goto std_return; | |
2213 | ||
2214 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
2215 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
2216 | /* | |
2217 | * The symlink will fit into the inode data fork? | |
2218 | * There can't be any attributes so we get the whole variable part. | |
2219 | */ | |
2220 | if (pathlen <= XFS_LITINO(mp)) | |
2221 | fs_blocks = 0; | |
2222 | else | |
2223 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); | |
556b8b16 | 2224 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks); |
1da177e4 LT |
2225 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
2226 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
2227 | if (error == ENOSPC && fs_blocks == 0) { | |
2228 | resblks = 0; | |
2229 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, | |
2230 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
2231 | } | |
2232 | if (error) { | |
2233 | cancel_flags = 0; | |
1da177e4 LT |
2234 | goto error_return; |
2235 | } | |
2236 | ||
f7c66ce3 | 2237 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
993386c1 | 2238 | unlock_dp_on_error = B_TRUE; |
1da177e4 LT |
2239 | |
2240 | /* | |
2241 | * Check whether the directory allows new symlinks or not. | |
2242 | */ | |
2243 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
2244 | error = XFS_ERROR(EPERM); | |
2245 | goto error_return; | |
2246 | } | |
2247 | ||
2248 | /* | |
2249 | * Reserve disk quota : blocks and inode. | |
2250 | */ | |
2251 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); | |
2252 | if (error) | |
2253 | goto error_return; | |
2254 | ||
2255 | /* | |
2256 | * Check for ability to enter directory entry, if no space reserved. | |
2257 | */ | |
556b8b16 BN |
2258 | error = xfs_dir_canenter(tp, dp, link_name, resblks); |
2259 | if (error) | |
1da177e4 LT |
2260 | goto error_return; |
2261 | /* | |
2262 | * Initialize the bmap freelist prior to calling either | |
2263 | * bmapi or the directory create code. | |
2264 | */ | |
9d87c319 | 2265 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 LT |
2266 | |
2267 | /* | |
2268 | * Allocate an inode for the symlink. | |
2269 | */ | |
3e5daf05 | 2270 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), |
1da177e4 LT |
2271 | 1, 0, credp, prid, resblks > 0, &ip, NULL); |
2272 | if (error) { | |
2273 | if (error == ENOSPC) | |
2274 | goto error_return; | |
2275 | goto error1; | |
2276 | } | |
cf441eeb | 2277 | xfs_itrace_ref(ip); |
1da177e4 | 2278 | |
993386c1 CH |
2279 | /* |
2280 | * An error after we've joined dp to the transaction will result in the | |
2281 | * transaction cancel unlocking dp so don't do it explicitly in the | |
2282 | * error path. | |
2283 | */ | |
3937be5b | 2284 | IHOLD(dp); |
1da177e4 | 2285 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
993386c1 | 2286 | unlock_dp_on_error = B_FALSE; |
1da177e4 LT |
2287 | |
2288 | /* | |
2289 | * Also attach the dquot(s) to it, if applicable. | |
2290 | */ | |
2291 | XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp); | |
2292 | ||
2293 | if (resblks) | |
2294 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
2295 | /* | |
2296 | * If the symlink will fit into the inode, write it inline. | |
2297 | */ | |
2298 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
2299 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
2300 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
2301 | ip->i_d.di_size = pathlen; | |
2302 | ||
2303 | /* | |
2304 | * The inode was initially created in extent format. | |
2305 | */ | |
2306 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
2307 | ip->i_df.if_flags |= XFS_IFINLINE; | |
2308 | ||
2309 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
2310 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
2311 | ||
2312 | } else { | |
2313 | first_fsb = 0; | |
2314 | nmaps = SYMLINK_MAPS; | |
2315 | ||
2316 | error = xfs_bmapi(tp, ip, first_fsb, fs_blocks, | |
2317 | XFS_BMAPI_WRITE | XFS_BMAPI_METADATA, | |
2318 | &first_block, resblks, mval, &nmaps, | |
3e57ecf6 | 2319 | &free_list, NULL); |
1da177e4 LT |
2320 | if (error) { |
2321 | goto error1; | |
2322 | } | |
2323 | ||
2324 | if (resblks) | |
2325 | resblks -= fs_blocks; | |
2326 | ip->i_d.di_size = pathlen; | |
2327 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
2328 | ||
2329 | cur_chunk = target_path; | |
2330 | for (n = 0; n < nmaps; n++) { | |
2331 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
2332 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
2333 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
2334 | BTOBB(byte_cnt), 0); | |
2335 | ASSERT(bp && !XFS_BUF_GETERROR(bp)); | |
2336 | if (pathlen < byte_cnt) { | |
2337 | byte_cnt = pathlen; | |
2338 | } | |
2339 | pathlen -= byte_cnt; | |
2340 | ||
2341 | memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt); | |
2342 | cur_chunk += byte_cnt; | |
2343 | ||
2344 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | /* | |
2349 | * Create the directory entry for the symlink. | |
2350 | */ | |
556b8b16 BN |
2351 | error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, |
2352 | &first_block, &free_list, resblks); | |
f6c2d1fa | 2353 | if (error) |
1da177e4 | 2354 | goto error1; |
1da177e4 LT |
2355 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
2356 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
2357 | ||
1da177e4 LT |
2358 | /* |
2359 | * If this is a synchronous mount, make sure that the | |
2360 | * symlink transaction goes to disk before returning to | |
2361 | * the user. | |
2362 | */ | |
2363 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2364 | xfs_trans_set_sync(tp); | |
2365 | } | |
2366 | ||
2367 | /* | |
2368 | * xfs_trans_commit normally decrements the vnode ref count | |
2369 | * when it unlocks the inode. Since we want to return the | |
2370 | * vnode to the caller, we bump the vnode ref count now. | |
2371 | */ | |
2372 | IHOLD(ip); | |
2373 | ||
f7c99b6f | 2374 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2375 | if (error) { |
2376 | goto error2; | |
2377 | } | |
1c72bf90 | 2378 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2379 | XFS_QM_DQRELE(mp, udqp); |
2380 | XFS_QM_DQRELE(mp, gdqp); | |
2381 | ||
2382 | /* Fall through to std_return with error = 0 or errno from | |
2383 | * xfs_trans_commit */ | |
2384 | std_return: | |
993386c1 | 2385 | if (DM_EVENT_ENABLED(dp, DM_EVENT_POSTSYMLINK)) { |
1da177e4 | 2386 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK, |
bc4ac74a CH |
2387 | dp, DM_RIGHT_NULL, |
2388 | error ? NULL : ip, | |
556b8b16 BN |
2389 | DM_RIGHT_NULL, link_name->name, |
2390 | target_path, 0, error, 0); | |
1da177e4 LT |
2391 | } |
2392 | ||
3937be5b CH |
2393 | if (!error) |
2394 | *ipp = ip; | |
1da177e4 LT |
2395 | return error; |
2396 | ||
2397 | error2: | |
2398 | IRELE(ip); | |
2399 | error1: | |
2400 | xfs_bmap_cancel(&free_list); | |
2401 | cancel_flags |= XFS_TRANS_ABORT; | |
2402 | error_return: | |
2403 | xfs_trans_cancel(tp, cancel_flags); | |
2404 | XFS_QM_DQRELE(mp, udqp); | |
2405 | XFS_QM_DQRELE(mp, gdqp); | |
2406 | ||
993386c1 | 2407 | if (unlock_dp_on_error) |
1da177e4 | 2408 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
1da177e4 LT |
2409 | |
2410 | goto std_return; | |
2411 | } | |
2412 | ||
1da177e4 | 2413 | int |
993386c1 CH |
2414 | xfs_set_dmattrs( |
2415 | xfs_inode_t *ip, | |
1da177e4 | 2416 | u_int evmask, |
993386c1 | 2417 | u_int16_t state) |
1da177e4 | 2418 | { |
993386c1 | 2419 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 | 2420 | xfs_trans_t *tp; |
1da177e4 LT |
2421 | int error; |
2422 | ||
2423 | if (!capable(CAP_SYS_ADMIN)) | |
2424 | return XFS_ERROR(EPERM); | |
2425 | ||
1da177e4 LT |
2426 | if (XFS_FORCED_SHUTDOWN(mp)) |
2427 | return XFS_ERROR(EIO); | |
2428 | ||
2429 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
2430 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
2431 | if (error) { | |
2432 | xfs_trans_cancel(tp, 0); | |
2433 | return error; | |
2434 | } | |
2435 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2436 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2437 | ||
613d7043 CH |
2438 | ip->i_d.di_dmevmask = evmask; |
2439 | ip->i_d.di_dmstate = state; | |
1da177e4 LT |
2440 | |
2441 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
2442 | IHOLD(ip); | |
1c72bf90 | 2443 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
2444 | |
2445 | return error; | |
2446 | } | |
2447 | ||
993386c1 | 2448 | int |
1da177e4 | 2449 | xfs_reclaim( |
993386c1 | 2450 | xfs_inode_t *ip) |
1da177e4 | 2451 | { |
1da177e4 | 2452 | |
cf441eeb | 2453 | xfs_itrace_entry(ip); |
1da177e4 | 2454 | |
df80c933 | 2455 | ASSERT(!VN_MAPPED(VFS_I(ip))); |
1da177e4 LT |
2456 | |
2457 | /* bad inode, get out here ASAP */ | |
cb4c8cc1 | 2458 | if (is_bad_inode(VFS_I(ip))) { |
1da177e4 LT |
2459 | xfs_ireclaim(ip); |
2460 | return 0; | |
2461 | } | |
2462 | ||
25e41b3d | 2463 | xfs_ioend_wait(ip); |
1da177e4 | 2464 | |
51c91ed5 | 2465 | ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); |
1da177e4 | 2466 | |
42fe2b1f CH |
2467 | /* |
2468 | * Make sure the atime in the XFS inode is correct before freeing the | |
2469 | * Linux inode. | |
2470 | */ | |
2471 | xfs_synchronize_atime(ip); | |
1da177e4 | 2472 | |
4c60658e DC |
2473 | /* |
2474 | * If we have nothing to flush with this inode then complete the | |
2475 | * teardown now, otherwise break the link between the xfs inode and the | |
2476 | * linux inode and clean up the xfs inode later. This avoids flushing | |
2477 | * the inode to disk during the delete operation itself. | |
2478 | * | |
2479 | * When breaking the link, we need to set the XFS_IRECLAIMABLE flag | |
2480 | * first to ensure that xfs_iunpin() will never see an xfs inode | |
2481 | * that has a linux inode being reclaimed. Synchronisation is provided | |
2482 | * by the i_flags_lock. | |
1da177e4 LT |
2483 | */ |
2484 | if (!ip->i_update_core && (ip->i_itemp == NULL)) { | |
2485 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2486 | xfs_iflock(ip); | |
bf904248 | 2487 | xfs_iflags_set(ip, XFS_IRECLAIMABLE); |
1dc3318a | 2488 | return xfs_reclaim_inode(ip, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC); |
1da177e4 | 2489 | } |
11654513 | 2490 | xfs_inode_set_reclaim_tag(ip); |
1da177e4 LT |
2491 | return 0; |
2492 | } | |
1da177e4 LT |
2493 | |
2494 | /* | |
2495 | * xfs_alloc_file_space() | |
2496 | * This routine allocates disk space for the given file. | |
2497 | * | |
2498 | * If alloc_type == 0, this request is for an ALLOCSP type | |
2499 | * request which will change the file size. In this case, no | |
2500 | * DMAPI event will be generated by the call. A TRUNCATE event | |
2501 | * will be generated later by xfs_setattr. | |
2502 | * | |
2503 | * If alloc_type != 0, this request is for a RESVSP type | |
2504 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the | |
2505 | * lower block boundary byte address is less than the file's | |
2506 | * length. | |
2507 | * | |
2508 | * RETURNS: | |
2509 | * 0 on success | |
2510 | * errno on error | |
2511 | * | |
2512 | */ | |
ba0f32d4 | 2513 | STATIC int |
1da177e4 LT |
2514 | xfs_alloc_file_space( |
2515 | xfs_inode_t *ip, | |
2516 | xfs_off_t offset, | |
2517 | xfs_off_t len, | |
2518 | int alloc_type, | |
2519 | int attr_flags) | |
2520 | { | |
dd9f438e NS |
2521 | xfs_mount_t *mp = ip->i_mount; |
2522 | xfs_off_t count; | |
1da177e4 LT |
2523 | xfs_filblks_t allocated_fsb; |
2524 | xfs_filblks_t allocatesize_fsb; | |
dd9f438e NS |
2525 | xfs_extlen_t extsz, temp; |
2526 | xfs_fileoff_t startoffset_fsb; | |
1da177e4 | 2527 | xfs_fsblock_t firstfsb; |
dd9f438e NS |
2528 | int nimaps; |
2529 | int bmapi_flag; | |
2530 | int quota_flag; | |
1da177e4 | 2531 | int rt; |
1da177e4 | 2532 | xfs_trans_t *tp; |
dd9f438e NS |
2533 | xfs_bmbt_irec_t imaps[1], *imapp; |
2534 | xfs_bmap_free_t free_list; | |
2535 | uint qblocks, resblks, resrtextents; | |
2536 | int committed; | |
2537 | int error; | |
1da177e4 | 2538 | |
cf441eeb | 2539 | xfs_itrace_entry(ip); |
1da177e4 LT |
2540 | |
2541 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2542 | return XFS_ERROR(EIO); | |
2543 | ||
1da177e4 LT |
2544 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
2545 | return error; | |
2546 | ||
2547 | if (len <= 0) | |
2548 | return XFS_ERROR(EINVAL); | |
2549 | ||
957d0ebe DC |
2550 | rt = XFS_IS_REALTIME_INODE(ip); |
2551 | extsz = xfs_get_extsz_hint(ip); | |
2552 | ||
1da177e4 | 2553 | count = len; |
1da177e4 | 2554 | imapp = &imaps[0]; |
dd9f438e NS |
2555 | nimaps = 1; |
2556 | bmapi_flag = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0); | |
1da177e4 LT |
2557 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
2558 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); | |
2559 | ||
2560 | /* Generate a DMAPI event if needed. */ | |
ba87ea69 | 2561 | if (alloc_type != 0 && offset < ip->i_size && |
0f285c8a | 2562 | (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 2563 | DM_EVENT_ENABLED(ip, DM_EVENT_WRITE)) { |
1da177e4 LT |
2564 | xfs_off_t end_dmi_offset; |
2565 | ||
2566 | end_dmi_offset = offset+len; | |
ba87ea69 LM |
2567 | if (end_dmi_offset > ip->i_size) |
2568 | end_dmi_offset = ip->i_size; | |
bc4ac74a CH |
2569 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, ip, offset, |
2570 | end_dmi_offset - offset, 0, NULL); | |
1da177e4 | 2571 | if (error) |
014c2544 | 2572 | return error; |
1da177e4 LT |
2573 | } |
2574 | ||
2575 | /* | |
dd9f438e | 2576 | * Allocate file space until done or until there is an error |
1da177e4 LT |
2577 | */ |
2578 | retry: | |
2579 | while (allocatesize_fsb && !error) { | |
dd9f438e NS |
2580 | xfs_fileoff_t s, e; |
2581 | ||
1da177e4 | 2582 | /* |
3ddb8fa9 | 2583 | * Determine space reservations for data/realtime. |
1da177e4 | 2584 | */ |
dd9f438e | 2585 | if (unlikely(extsz)) { |
1da177e4 | 2586 | s = startoffset_fsb; |
dd9f438e NS |
2587 | do_div(s, extsz); |
2588 | s *= extsz; | |
2589 | e = startoffset_fsb + allocatesize_fsb; | |
2590 | if ((temp = do_mod(startoffset_fsb, extsz))) | |
2591 | e += temp; | |
2592 | if ((temp = do_mod(e, extsz))) | |
2593 | e += extsz - temp; | |
2594 | } else { | |
2595 | s = 0; | |
2596 | e = allocatesize_fsb; | |
2597 | } | |
2598 | ||
2599 | if (unlikely(rt)) { | |
2600 | resrtextents = qblocks = (uint)(e - s); | |
2601 | resrtextents /= mp->m_sb.sb_rextsize; | |
2602 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
2603 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
1da177e4 | 2604 | } else { |
dd9f438e NS |
2605 | resrtextents = 0; |
2606 | resblks = qblocks = \ | |
2607 | XFS_DIOSTRAT_SPACE_RES(mp, (uint)(e - s)); | |
2608 | quota_flag = XFS_QMOPT_RES_REGBLKS; | |
1da177e4 LT |
2609 | } |
2610 | ||
2611 | /* | |
dd9f438e | 2612 | * Allocate and setup the transaction. |
1da177e4 LT |
2613 | */ |
2614 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
dd9f438e NS |
2615 | error = xfs_trans_reserve(tp, resblks, |
2616 | XFS_WRITE_LOG_RES(mp), resrtextents, | |
1da177e4 LT |
2617 | XFS_TRANS_PERM_LOG_RES, |
2618 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 2619 | /* |
dd9f438e | 2620 | * Check for running out of space |
1da177e4 LT |
2621 | */ |
2622 | if (error) { | |
2623 | /* | |
2624 | * Free the transaction structure. | |
2625 | */ | |
2626 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
2627 | xfs_trans_cancel(tp, 0); | |
2628 | break; | |
2629 | } | |
2630 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
dd9f438e NS |
2631 | error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, |
2632 | qblocks, 0, quota_flag); | |
1da177e4 LT |
2633 | if (error) |
2634 | goto error1; | |
2635 | ||
2636 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2637 | xfs_trans_ihold(tp, ip); | |
2638 | ||
2639 | /* | |
dd9f438e | 2640 | * Issue the xfs_bmapi() call to allocate the blocks |
1da177e4 | 2641 | */ |
9d87c319 | 2642 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 2643 | error = xfs_bmapi(tp, ip, startoffset_fsb, |
dd9f438e NS |
2644 | allocatesize_fsb, bmapi_flag, |
2645 | &firstfsb, 0, imapp, &nimaps, | |
3e57ecf6 | 2646 | &free_list, NULL); |
1da177e4 LT |
2647 | if (error) { |
2648 | goto error0; | |
2649 | } | |
2650 | ||
2651 | /* | |
dd9f438e | 2652 | * Complete the transaction |
1da177e4 | 2653 | */ |
f7c99b6f | 2654 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2655 | if (error) { |
2656 | goto error0; | |
2657 | } | |
2658 | ||
1c72bf90 | 2659 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2660 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2661 | if (error) { | |
2662 | break; | |
2663 | } | |
2664 | ||
2665 | allocated_fsb = imapp->br_blockcount; | |
2666 | ||
dd9f438e | 2667 | if (nimaps == 0) { |
1da177e4 LT |
2668 | error = XFS_ERROR(ENOSPC); |
2669 | break; | |
2670 | } | |
2671 | ||
2672 | startoffset_fsb += allocated_fsb; | |
2673 | allocatesize_fsb -= allocated_fsb; | |
2674 | } | |
2675 | dmapi_enospc_check: | |
0f285c8a | 2676 | if (error == ENOSPC && (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 2677 | DM_EVENT_ENABLED(ip, DM_EVENT_NOSPACE)) { |
1da177e4 | 2678 | error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE, |
bc4ac74a CH |
2679 | ip, DM_RIGHT_NULL, |
2680 | ip, DM_RIGHT_NULL, | |
1da177e4 LT |
2681 | NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */ |
2682 | if (error == 0) | |
2683 | goto retry; /* Maybe DMAPI app. has made space */ | |
2684 | /* else fall through with error from XFS_SEND_DATA */ | |
2685 | } | |
2686 | ||
2687 | return error; | |
2688 | ||
dd9f438e | 2689 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 2690 | xfs_bmap_cancel(&free_list); |
dd9f438e NS |
2691 | XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, qblocks, 0, quota_flag); |
2692 | ||
2693 | error1: /* Just cancel transaction */ | |
1da177e4 LT |
2694 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
2695 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
2696 | goto dmapi_enospc_check; | |
2697 | } | |
2698 | ||
2699 | /* | |
2700 | * Zero file bytes between startoff and endoff inclusive. | |
2701 | * The iolock is held exclusive and no blocks are buffered. | |
2fd6f6ec LM |
2702 | * |
2703 | * This function is used by xfs_free_file_space() to zero | |
2704 | * partial blocks when the range to free is not block aligned. | |
2705 | * When unreserving space with boundaries that are not block | |
2706 | * aligned we round up the start and round down the end | |
2707 | * boundaries and then use this function to zero the parts of | |
2708 | * the blocks that got dropped during the rounding. | |
1da177e4 LT |
2709 | */ |
2710 | STATIC int | |
2711 | xfs_zero_remaining_bytes( | |
2712 | xfs_inode_t *ip, | |
2713 | xfs_off_t startoff, | |
2714 | xfs_off_t endoff) | |
2715 | { | |
2716 | xfs_bmbt_irec_t imap; | |
2717 | xfs_fileoff_t offset_fsb; | |
2718 | xfs_off_t lastoffset; | |
2719 | xfs_off_t offset; | |
2720 | xfs_buf_t *bp; | |
2721 | xfs_mount_t *mp = ip->i_mount; | |
2722 | int nimap; | |
2723 | int error = 0; | |
2724 | ||
2fd6f6ec LM |
2725 | /* |
2726 | * Avoid doing I/O beyond eof - it's not necessary | |
2727 | * since nothing can read beyond eof. The space will | |
2728 | * be zeroed when the file is extended anyway. | |
2729 | */ | |
2730 | if (startoff >= ip->i_size) | |
2731 | return 0; | |
2732 | ||
2733 | if (endoff > ip->i_size) | |
2734 | endoff = ip->i_size; | |
2735 | ||
1da177e4 | 2736 | bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize, |
71ddabb9 | 2737 | XFS_IS_REALTIME_INODE(ip) ? |
1da177e4 | 2738 | mp->m_rtdev_targp : mp->m_ddev_targp); |
c6422617 LM |
2739 | if (!bp) |
2740 | return XFS_ERROR(ENOMEM); | |
1da177e4 LT |
2741 | |
2742 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { | |
2743 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
2744 | nimap = 1; | |
541d7d3c | 2745 | error = xfs_bmapi(NULL, ip, offset_fsb, 1, 0, |
3e57ecf6 | 2746 | NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
2747 | if (error || nimap < 1) |
2748 | break; | |
2749 | ASSERT(imap.br_blockcount >= 1); | |
2750 | ASSERT(imap.br_startoff == offset_fsb); | |
2751 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; | |
2752 | if (lastoffset > endoff) | |
2753 | lastoffset = endoff; | |
2754 | if (imap.br_startblock == HOLESTARTBLOCK) | |
2755 | continue; | |
2756 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2757 | if (imap.br_state == XFS_EXT_UNWRITTEN) | |
2758 | continue; | |
2759 | XFS_BUF_UNDONE(bp); | |
2760 | XFS_BUF_UNWRITE(bp); | |
2761 | XFS_BUF_READ(bp); | |
9d87c319 | 2762 | XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock)); |
1da177e4 | 2763 | xfsbdstrat(mp, bp); |
d64e31a2 DC |
2764 | error = xfs_iowait(bp); |
2765 | if (error) { | |
1da177e4 LT |
2766 | xfs_ioerror_alert("xfs_zero_remaining_bytes(read)", |
2767 | mp, bp, XFS_BUF_ADDR(bp)); | |
2768 | break; | |
2769 | } | |
2770 | memset(XFS_BUF_PTR(bp) + | |
2771 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), | |
2772 | 0, lastoffset - offset + 1); | |
2773 | XFS_BUF_UNDONE(bp); | |
2774 | XFS_BUF_UNREAD(bp); | |
2775 | XFS_BUF_WRITE(bp); | |
2776 | xfsbdstrat(mp, bp); | |
d64e31a2 DC |
2777 | error = xfs_iowait(bp); |
2778 | if (error) { | |
1da177e4 LT |
2779 | xfs_ioerror_alert("xfs_zero_remaining_bytes(write)", |
2780 | mp, bp, XFS_BUF_ADDR(bp)); | |
2781 | break; | |
2782 | } | |
2783 | } | |
2784 | xfs_buf_free(bp); | |
2785 | return error; | |
2786 | } | |
2787 | ||
2788 | /* | |
2789 | * xfs_free_file_space() | |
2790 | * This routine frees disk space for the given file. | |
2791 | * | |
2792 | * This routine is only called by xfs_change_file_space | |
2793 | * for an UNRESVSP type call. | |
2794 | * | |
2795 | * RETURNS: | |
2796 | * 0 on success | |
2797 | * errno on error | |
2798 | * | |
2799 | */ | |
2800 | STATIC int | |
2801 | xfs_free_file_space( | |
2802 | xfs_inode_t *ip, | |
2803 | xfs_off_t offset, | |
2804 | xfs_off_t len, | |
2805 | int attr_flags) | |
2806 | { | |
2807 | int committed; | |
2808 | int done; | |
2809 | xfs_off_t end_dmi_offset; | |
2810 | xfs_fileoff_t endoffset_fsb; | |
2811 | int error; | |
2812 | xfs_fsblock_t firstfsb; | |
2813 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
2814 | xfs_bmbt_irec_t imap; |
2815 | xfs_off_t ioffset; | |
2816 | xfs_extlen_t mod=0; | |
2817 | xfs_mount_t *mp; | |
2818 | int nimap; | |
2819 | uint resblks; | |
673cdf5c | 2820 | uint rounding; |
1da177e4 LT |
2821 | int rt; |
2822 | xfs_fileoff_t startoffset_fsb; | |
2823 | xfs_trans_t *tp; | |
5fcbab35 | 2824 | int need_iolock = 1; |
1da177e4 | 2825 | |
1da177e4 LT |
2826 | mp = ip->i_mount; |
2827 | ||
cf441eeb | 2828 | xfs_itrace_entry(ip); |
bd5a876a | 2829 | |
1da177e4 LT |
2830 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
2831 | return error; | |
2832 | ||
2833 | error = 0; | |
2834 | if (len <= 0) /* if nothing being freed */ | |
2835 | return error; | |
71ddabb9 | 2836 | rt = XFS_IS_REALTIME_INODE(ip); |
1da177e4 LT |
2837 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
2838 | end_dmi_offset = offset + len; | |
2839 | endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset); | |
2840 | ||
0f285c8a | 2841 | if (offset < ip->i_size && (attr_flags & XFS_ATTR_DMI) == 0 && |
eb9df39d | 2842 | DM_EVENT_ENABLED(ip, DM_EVENT_WRITE)) { |
ba87ea69 LM |
2843 | if (end_dmi_offset > ip->i_size) |
2844 | end_dmi_offset = ip->i_size; | |
bc4ac74a | 2845 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, ip, |
1da177e4 LT |
2846 | offset, end_dmi_offset - offset, |
2847 | AT_DELAY_FLAG(attr_flags), NULL); | |
2848 | if (error) | |
014c2544 | 2849 | return error; |
1da177e4 LT |
2850 | } |
2851 | ||
0f285c8a | 2852 | if (attr_flags & XFS_ATTR_NOLOCK) |
5fcbab35 | 2853 | need_iolock = 0; |
9fa8046f | 2854 | if (need_iolock) { |
1da177e4 | 2855 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
25e41b3d CH |
2856 | /* wait for the completion of any pending DIOs */ |
2857 | xfs_ioend_wait(ip); | |
9fa8046f | 2858 | } |
5fcbab35 | 2859 | |
e6a4b37f | 2860 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); |
1da177e4 | 2861 | ioffset = offset & ~(rounding - 1); |
bd5a876a | 2862 | |
df80c933 | 2863 | if (VN_CACHED(VFS_I(ip)) != 0) { |
e6a4b37f TS |
2864 | xfs_inval_cached_trace(ip, ioffset, -1, ioffset, -1); |
2865 | error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); | |
d3cf2094 LM |
2866 | if (error) |
2867 | goto out_unlock_iolock; | |
bd5a876a CH |
2868 | } |
2869 | ||
1da177e4 LT |
2870 | /* |
2871 | * Need to zero the stuff we're not freeing, on disk. | |
9da096fd | 2872 | * If it's a realtime file & can't use unwritten extents then we |
1da177e4 LT |
2873 | * actually need to zero the extent edges. Otherwise xfs_bunmapi |
2874 | * will take care of it for us. | |
2875 | */ | |
62118709 | 2876 | if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 | 2877 | nimap = 1; |
541d7d3c | 2878 | error = xfs_bmapi(NULL, ip, startoffset_fsb, |
3e57ecf6 | 2879 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
2880 | if (error) |
2881 | goto out_unlock_iolock; | |
2882 | ASSERT(nimap == 0 || nimap == 1); | |
2883 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2884 | xfs_daddr_t block; | |
2885 | ||
2886 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2887 | block = imap.br_startblock; | |
2888 | mod = do_div(block, mp->m_sb.sb_rextsize); | |
2889 | if (mod) | |
2890 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; | |
2891 | } | |
2892 | nimap = 1; | |
541d7d3c | 2893 | error = xfs_bmapi(NULL, ip, endoffset_fsb - 1, |
3e57ecf6 | 2894 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
1da177e4 LT |
2895 | if (error) |
2896 | goto out_unlock_iolock; | |
2897 | ASSERT(nimap == 0 || nimap == 1); | |
2898 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
2899 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
2900 | mod++; | |
2901 | if (mod && (mod != mp->m_sb.sb_rextsize)) | |
2902 | endoffset_fsb -= mod; | |
2903 | } | |
2904 | } | |
2905 | if ((done = (endoffset_fsb <= startoffset_fsb))) | |
2906 | /* | |
2907 | * One contiguous piece to clear | |
2908 | */ | |
2909 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); | |
2910 | else { | |
2911 | /* | |
2912 | * Some full blocks, possibly two pieces to clear | |
2913 | */ | |
2914 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) | |
2915 | error = xfs_zero_remaining_bytes(ip, offset, | |
2916 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); | |
2917 | if (!error && | |
2918 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) | |
2919 | error = xfs_zero_remaining_bytes(ip, | |
2920 | XFS_FSB_TO_B(mp, endoffset_fsb), | |
2921 | offset + len - 1); | |
2922 | } | |
2923 | ||
2924 | /* | |
2925 | * free file space until done or until there is an error | |
2926 | */ | |
2927 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
2928 | while (!error && !done) { | |
2929 | ||
2930 | /* | |
91ebecc7 DC |
2931 | * allocate and setup the transaction. Allow this |
2932 | * transaction to dip into the reserve blocks to ensure | |
2933 | * the freeing of the space succeeds at ENOSPC. | |
1da177e4 LT |
2934 | */ |
2935 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
91ebecc7 | 2936 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
2937 | error = xfs_trans_reserve(tp, |
2938 | resblks, | |
2939 | XFS_WRITE_LOG_RES(mp), | |
2940 | 0, | |
2941 | XFS_TRANS_PERM_LOG_RES, | |
2942 | XFS_WRITE_LOG_COUNT); | |
2943 | ||
2944 | /* | |
2945 | * check for running out of space | |
2946 | */ | |
2947 | if (error) { | |
2948 | /* | |
2949 | * Free the transaction structure. | |
2950 | */ | |
2951 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
2952 | xfs_trans_cancel(tp, 0); | |
2953 | break; | |
2954 | } | |
2955 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2956 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, | |
dd9f438e NS |
2957 | ip->i_udquot, ip->i_gdquot, resblks, 0, |
2958 | XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
2959 | if (error) |
2960 | goto error1; | |
2961 | ||
2962 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2963 | xfs_trans_ihold(tp, ip); | |
2964 | ||
2965 | /* | |
2966 | * issue the bunmapi() call to free the blocks | |
2967 | */ | |
9d87c319 | 2968 | xfs_bmap_init(&free_list, &firstfsb); |
541d7d3c | 2969 | error = xfs_bunmapi(tp, ip, startoffset_fsb, |
1da177e4 | 2970 | endoffset_fsb - startoffset_fsb, |
3e57ecf6 | 2971 | 0, 2, &firstfsb, &free_list, NULL, &done); |
1da177e4 LT |
2972 | if (error) { |
2973 | goto error0; | |
2974 | } | |
2975 | ||
2976 | /* | |
2977 | * complete the transaction | |
2978 | */ | |
f7c99b6f | 2979 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2980 | if (error) { |
2981 | goto error0; | |
2982 | } | |
2983 | ||
1c72bf90 | 2984 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2985 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
2986 | } | |
2987 | ||
2988 | out_unlock_iolock: | |
2989 | if (need_iolock) | |
2990 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
2991 | return error; | |
2992 | ||
2993 | error0: | |
2994 | xfs_bmap_cancel(&free_list); | |
2995 | error1: | |
2996 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
2997 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : | |
2998 | XFS_ILOCK_EXCL); | |
2999 | return error; | |
3000 | } | |
3001 | ||
3002 | /* | |
3003 | * xfs_change_file_space() | |
3004 | * This routine allocates or frees disk space for the given file. | |
3005 | * The user specified parameters are checked for alignment and size | |
3006 | * limitations. | |
3007 | * | |
3008 | * RETURNS: | |
3009 | * 0 on success | |
3010 | * errno on error | |
3011 | * | |
3012 | */ | |
3013 | int | |
3014 | xfs_change_file_space( | |
993386c1 | 3015 | xfs_inode_t *ip, |
1da177e4 LT |
3016 | int cmd, |
3017 | xfs_flock64_t *bf, | |
3018 | xfs_off_t offset, | |
1da177e4 LT |
3019 | int attr_flags) |
3020 | { | |
993386c1 | 3021 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
3022 | int clrprealloc; |
3023 | int error; | |
3024 | xfs_fsize_t fsize; | |
1da177e4 LT |
3025 | int setprealloc; |
3026 | xfs_off_t startoffset; | |
3027 | xfs_off_t llen; | |
3028 | xfs_trans_t *tp; | |
0f285c8a | 3029 | struct iattr iattr; |
1da177e4 | 3030 | |
cf441eeb | 3031 | xfs_itrace_entry(ip); |
1da177e4 | 3032 | |
993386c1 | 3033 | if (!S_ISREG(ip->i_d.di_mode)) |
1da177e4 LT |
3034 | return XFS_ERROR(EINVAL); |
3035 | ||
1da177e4 LT |
3036 | switch (bf->l_whence) { |
3037 | case 0: /*SEEK_SET*/ | |
3038 | break; | |
3039 | case 1: /*SEEK_CUR*/ | |
3040 | bf->l_start += offset; | |
3041 | break; | |
3042 | case 2: /*SEEK_END*/ | |
ba87ea69 | 3043 | bf->l_start += ip->i_size; |
1da177e4 LT |
3044 | break; |
3045 | default: | |
3046 | return XFS_ERROR(EINVAL); | |
3047 | } | |
3048 | ||
3049 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; | |
3050 | ||
3051 | if ( (bf->l_start < 0) | |
3052 | || (bf->l_start > XFS_MAXIOFFSET(mp)) | |
3053 | || (bf->l_start + llen < 0) | |
3054 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) | |
3055 | return XFS_ERROR(EINVAL); | |
3056 | ||
3057 | bf->l_whence = 0; | |
3058 | ||
3059 | startoffset = bf->l_start; | |
ba87ea69 | 3060 | fsize = ip->i_size; |
1da177e4 LT |
3061 | |
3062 | /* | |
3063 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve | |
3064 | * file space. | |
3065 | * These calls do NOT zero the data space allocated to the file, | |
3066 | * nor do they change the file size. | |
3067 | * | |
3068 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file | |
3069 | * space. | |
3070 | * These calls cause the new file data to be zeroed and the file | |
3071 | * size to be changed. | |
3072 | */ | |
3073 | setprealloc = clrprealloc = 0; | |
3074 | ||
3075 | switch (cmd) { | |
3076 | case XFS_IOC_RESVSP: | |
3077 | case XFS_IOC_RESVSP64: | |
3078 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, | |
3079 | 1, attr_flags); | |
3080 | if (error) | |
3081 | return error; | |
3082 | setprealloc = 1; | |
3083 | break; | |
3084 | ||
3085 | case XFS_IOC_UNRESVSP: | |
3086 | case XFS_IOC_UNRESVSP64: | |
3087 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, | |
3088 | attr_flags))) | |
3089 | return error; | |
3090 | break; | |
3091 | ||
3092 | case XFS_IOC_ALLOCSP: | |
3093 | case XFS_IOC_ALLOCSP64: | |
3094 | case XFS_IOC_FREESP: | |
3095 | case XFS_IOC_FREESP64: | |
3096 | if (startoffset > fsize) { | |
3097 | error = xfs_alloc_file_space(ip, fsize, | |
3098 | startoffset - fsize, 0, attr_flags); | |
3099 | if (error) | |
3100 | break; | |
3101 | } | |
3102 | ||
0f285c8a CH |
3103 | iattr.ia_valid = ATTR_SIZE; |
3104 | iattr.ia_size = startoffset; | |
1da177e4 | 3105 | |
ea5a3dc8 | 3106 | error = xfs_setattr(ip, &iattr, attr_flags); |
1da177e4 LT |
3107 | |
3108 | if (error) | |
3109 | return error; | |
3110 | ||
3111 | clrprealloc = 1; | |
3112 | break; | |
3113 | ||
3114 | default: | |
3115 | ASSERT(0); | |
3116 | return XFS_ERROR(EINVAL); | |
3117 | } | |
3118 | ||
3119 | /* | |
3120 | * update the inode timestamp, mode, and prealloc flag bits | |
3121 | */ | |
3122 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
3123 | ||
3124 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), | |
3125 | 0, 0, 0))) { | |
3126 | /* ASSERT(0); */ | |
3127 | xfs_trans_cancel(tp, 0); | |
3128 | return error; | |
3129 | } | |
3130 | ||
3131 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3132 | ||
3133 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
3134 | xfs_trans_ihold(tp, ip); | |
3135 | ||
0f285c8a | 3136 | if ((attr_flags & XFS_ATTR_DMI) == 0) { |
1da177e4 LT |
3137 | ip->i_d.di_mode &= ~S_ISUID; |
3138 | ||
3139 | /* | |
3140 | * Note that we don't have to worry about mandatory | |
3141 | * file locking being disabled here because we only | |
3142 | * clear the S_ISGID bit if the Group execute bit is | |
3143 | * on, but if it was on then mandatory locking wouldn't | |
3144 | * have been enabled. | |
3145 | */ | |
3146 | if (ip->i_d.di_mode & S_IXGRP) | |
3147 | ip->i_d.di_mode &= ~S_ISGID; | |
3148 | ||
3149 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
3150 | } | |
3151 | if (setprealloc) | |
3152 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; | |
3153 | else if (clrprealloc) | |
3154 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; | |
3155 | ||
3156 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
3157 | xfs_trans_set_sync(tp); | |
3158 | ||
1c72bf90 | 3159 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
3160 | |
3161 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3162 | ||
3163 | return error; | |
3164 | } |