Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
16f7e0fe | 18 | |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
1da177e4 | 21 | #include "xfs_types.h" |
a844f451 | 22 | #include "xfs_bit.h" |
1da177e4 | 23 | #include "xfs_log.h" |
a844f451 | 24 | #include "xfs_inum.h" |
1da177e4 LT |
25 | #include "xfs_trans.h" |
26 | #include "xfs_sb.h" | |
27 | #include "xfs_ag.h" | |
1da177e4 LT |
28 | #include "xfs_dir2.h" |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_mount.h" | |
a844f451 | 31 | #include "xfs_da_btree.h" |
1da177e4 | 32 | #include "xfs_bmap_btree.h" |
a844f451 | 33 | #include "xfs_alloc_btree.h" |
1da177e4 | 34 | #include "xfs_ialloc_btree.h" |
1da177e4 | 35 | #include "xfs_dir2_sf.h" |
a844f451 | 36 | #include "xfs_attr_sf.h" |
1da177e4 | 37 | #include "xfs_dinode.h" |
1da177e4 | 38 | #include "xfs_inode.h" |
a844f451 | 39 | #include "xfs_inode_item.h" |
a844f451 NS |
40 | #include "xfs_itable.h" |
41 | #include "xfs_btree.h" | |
42 | #include "xfs_ialloc.h" | |
43 | #include "xfs_alloc.h" | |
1da177e4 | 44 | #include "xfs_bmap.h" |
1da177e4 LT |
45 | #include "xfs_attr.h" |
46 | #include "xfs_rw.h" | |
1da177e4 | 47 | #include "xfs_error.h" |
1da177e4 LT |
48 | #include "xfs_quota.h" |
49 | #include "xfs_utils.h" | |
a844f451 NS |
50 | #include "xfs_rtalloc.h" |
51 | #include "xfs_refcache.h" | |
1da177e4 | 52 | #include "xfs_trans_space.h" |
1da177e4 LT |
53 | #include "xfs_log_priv.h" |
54 | ||
1da177e4 LT |
55 | STATIC int |
56 | xfs_open( | |
57 | bhv_desc_t *bdp, | |
58 | cred_t *credp) | |
59 | { | |
60 | int mode; | |
67fcaa73 | 61 | bhv_vnode_t *vp = BHV_TO_VNODE(bdp); |
7d4fb40a | 62 | xfs_inode_t *ip = XFS_BHVTOI(bdp); |
1da177e4 LT |
63 | |
64 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) | |
65 | return XFS_ERROR(EIO); | |
66 | ||
67 | /* | |
68 | * If it's a directory with any blocks, read-ahead block 0 | |
69 | * as we're almost certain to have the next operation be a read there. | |
70 | */ | |
0432dab2 | 71 | if (VN_ISDIR(vp) && ip->i_d.di_nextents > 0) { |
1da177e4 LT |
72 | mode = xfs_ilock_map_shared(ip); |
73 | if (ip->i_d.di_nextents > 0) | |
74 | (void)xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK); | |
75 | xfs_iunlock(ip, mode); | |
76 | } | |
77 | return 0; | |
78 | } | |
79 | ||
7d4fb40a NS |
80 | STATIC int |
81 | xfs_close( | |
82 | bhv_desc_t *bdp, | |
83 | int flags, | |
84 | lastclose_t lastclose, | |
85 | cred_t *credp) | |
86 | { | |
67fcaa73 | 87 | bhv_vnode_t *vp = BHV_TO_VNODE(bdp); |
7d4fb40a | 88 | xfs_inode_t *ip = XFS_BHVTOI(bdp); |
7d4fb40a NS |
89 | |
90 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) | |
91 | return XFS_ERROR(EIO); | |
92 | ||
93 | if (lastclose != L_TRUE || !VN_ISREG(vp)) | |
94 | return 0; | |
95 | ||
96 | /* | |
97 | * If we previously truncated this file and removed old data in | |
98 | * the process, we want to initiate "early" writeout on the last | |
99 | * close. This is an attempt to combat the notorious NULL files | |
100 | * problem which is particularly noticable from a truncate down, | |
101 | * buffered (re-)write (delalloc), followed by a crash. What we | |
102 | * are effectively doing here is significantly reducing the time | |
103 | * window where we'd otherwise be exposed to that problem. | |
104 | */ | |
105 | if (VUNTRUNCATE(vp) && VN_DIRTY(vp) && ip->i_delayed_blks > 0) | |
67fcaa73 NS |
106 | return bhv_vop_flush_pages(vp, 0, -1, XFS_B_ASYNC, FI_NONE); |
107 | return 0; | |
7d4fb40a | 108 | } |
1da177e4 LT |
109 | |
110 | /* | |
111 | * xfs_getattr | |
112 | */ | |
113 | STATIC int | |
114 | xfs_getattr( | |
115 | bhv_desc_t *bdp, | |
8285fb58 | 116 | bhv_vattr_t *vap, |
1da177e4 LT |
117 | int flags, |
118 | cred_t *credp) | |
119 | { | |
120 | xfs_inode_t *ip; | |
121 | xfs_mount_t *mp; | |
67fcaa73 | 122 | bhv_vnode_t *vp; |
1da177e4 LT |
123 | |
124 | vp = BHV_TO_VNODE(bdp); | |
125 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); | |
126 | ||
127 | ip = XFS_BHVTOI(bdp); | |
128 | mp = ip->i_mount; | |
129 | ||
130 | if (XFS_FORCED_SHUTDOWN(mp)) | |
131 | return XFS_ERROR(EIO); | |
132 | ||
133 | if (!(flags & ATTR_LAZY)) | |
134 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
135 | ||
ba87ea69 | 136 | vap->va_size = XFS_ISIZE(ip); |
1da177e4 LT |
137 | if (vap->va_mask == XFS_AT_SIZE) |
138 | goto all_done; | |
139 | ||
140 | vap->va_nblocks = | |
141 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
142 | vap->va_nodeid = ip->i_ino; | |
143 | #if XFS_BIG_INUMS | |
144 | vap->va_nodeid += mp->m_inoadd; | |
145 | #endif | |
146 | vap->va_nlink = ip->i_d.di_nlink; | |
147 | ||
148 | /* | |
149 | * Quick exit for non-stat callers | |
150 | */ | |
151 | if ((vap->va_mask & | |
152 | ~(XFS_AT_SIZE|XFS_AT_FSID|XFS_AT_NODEID| | |
153 | XFS_AT_NLINK|XFS_AT_BLKSIZE)) == 0) | |
154 | goto all_done; | |
155 | ||
156 | /* | |
157 | * Copy from in-core inode. | |
158 | */ | |
0432dab2 | 159 | vap->va_mode = ip->i_d.di_mode; |
1da177e4 LT |
160 | vap->va_uid = ip->i_d.di_uid; |
161 | vap->va_gid = ip->i_d.di_gid; | |
162 | vap->va_projid = ip->i_d.di_projid; | |
163 | ||
164 | /* | |
165 | * Check vnode type block/char vs. everything else. | |
1da177e4 | 166 | */ |
0432dab2 CH |
167 | switch (ip->i_d.di_mode & S_IFMT) { |
168 | case S_IFBLK: | |
169 | case S_IFCHR: | |
170 | vap->va_rdev = ip->i_df.if_u2.if_rdev; | |
171 | vap->va_blocksize = BLKDEV_IOSIZE; | |
172 | break; | |
173 | default: | |
1da177e4 LT |
174 | vap->va_rdev = 0; |
175 | ||
176 | if (!(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) { | |
e8c8b3a7 | 177 | vap->va_blocksize = xfs_preferred_iosize(mp); |
1da177e4 LT |
178 | } else { |
179 | ||
180 | /* | |
181 | * If the file blocks are being allocated from a | |
182 | * realtime partition, then return the inode's | |
183 | * realtime extent size or the realtime volume's | |
184 | * extent size. | |
185 | */ | |
957d0ebe DC |
186 | vap->va_blocksize = |
187 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; | |
1da177e4 | 188 | } |
0432dab2 | 189 | break; |
1da177e4 LT |
190 | } |
191 | ||
ca5ccbf9 | 192 | vn_atime_to_timespec(vp, &vap->va_atime); |
1da177e4 LT |
193 | vap->va_mtime.tv_sec = ip->i_d.di_mtime.t_sec; |
194 | vap->va_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
195 | vap->va_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
196 | vap->va_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
197 | ||
198 | /* | |
199 | * Exit for stat callers. See if any of the rest of the fields | |
200 | * to be filled in are needed. | |
201 | */ | |
202 | if ((vap->va_mask & | |
203 | (XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS| | |
204 | XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0) | |
205 | goto all_done; | |
206 | ||
207 | /* | |
208 | * Convert di_flags to xflags. | |
209 | */ | |
210 | vap->va_xflags = xfs_ip2xflags(ip); | |
211 | ||
212 | /* | |
213 | * Exit for inode revalidate. See if any of the rest of | |
214 | * the fields to be filled in are needed. | |
215 | */ | |
216 | if ((vap->va_mask & | |
217 | (XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS| | |
218 | XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0) | |
219 | goto all_done; | |
220 | ||
221 | vap->va_extsize = ip->i_d.di_extsize << mp->m_sb.sb_blocklog; | |
222 | vap->va_nextents = | |
223 | (ip->i_df.if_flags & XFS_IFEXTENTS) ? | |
224 | ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) : | |
225 | ip->i_d.di_nextents; | |
226 | if (ip->i_afp) | |
227 | vap->va_anextents = | |
228 | (ip->i_afp->if_flags & XFS_IFEXTENTS) ? | |
229 | ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) : | |
230 | ip->i_d.di_anextents; | |
231 | else | |
232 | vap->va_anextents = 0; | |
233 | vap->va_gen = ip->i_d.di_gen; | |
234 | ||
235 | all_done: | |
236 | if (!(flags & ATTR_LAZY)) | |
237 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
238 | return 0; | |
239 | } | |
240 | ||
241 | ||
242 | /* | |
243 | * xfs_setattr | |
244 | */ | |
245 | int | |
246 | xfs_setattr( | |
247 | bhv_desc_t *bdp, | |
8285fb58 | 248 | bhv_vattr_t *vap, |
1da177e4 LT |
249 | int flags, |
250 | cred_t *credp) | |
251 | { | |
252 | xfs_inode_t *ip; | |
253 | xfs_trans_t *tp; | |
254 | xfs_mount_t *mp; | |
255 | int mask; | |
256 | int code; | |
257 | uint lock_flags; | |
258 | uint commit_flags=0; | |
259 | uid_t uid=0, iuid=0; | |
260 | gid_t gid=0, igid=0; | |
261 | int timeflags = 0; | |
67fcaa73 | 262 | bhv_vnode_t *vp; |
1da177e4 LT |
263 | xfs_prid_t projid=0, iprojid=0; |
264 | int mandlock_before, mandlock_after; | |
265 | struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2; | |
266 | int file_owner; | |
5fcbab35 | 267 | int need_iolock = 1; |
1da177e4 LT |
268 | |
269 | vp = BHV_TO_VNODE(bdp); | |
270 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); | |
271 | ||
272 | if (vp->v_vfsp->vfs_flag & VFS_RDONLY) | |
273 | return XFS_ERROR(EROFS); | |
274 | ||
275 | /* | |
276 | * Cannot set certain attributes. | |
277 | */ | |
278 | mask = vap->va_mask; | |
279 | if (mask & XFS_AT_NOSET) { | |
280 | return XFS_ERROR(EINVAL); | |
281 | } | |
282 | ||
283 | ip = XFS_BHVTOI(bdp); | |
284 | mp = ip->i_mount; | |
285 | ||
286 | if (XFS_FORCED_SHUTDOWN(mp)) | |
287 | return XFS_ERROR(EIO); | |
288 | ||
289 | /* | |
290 | * Timestamps do not need to be logged and hence do not | |
291 | * need to be done within a transaction. | |
292 | */ | |
293 | if (mask & XFS_AT_UPDTIMES) { | |
294 | ASSERT((mask & ~XFS_AT_UPDTIMES) == 0); | |
295 | timeflags = ((mask & XFS_AT_UPDATIME) ? XFS_ICHGTIME_ACC : 0) | | |
296 | ((mask & XFS_AT_UPDCTIME) ? XFS_ICHGTIME_CHG : 0) | | |
297 | ((mask & XFS_AT_UPDMTIME) ? XFS_ICHGTIME_MOD : 0); | |
298 | xfs_ichgtime(ip, timeflags); | |
299 | return 0; | |
300 | } | |
301 | ||
302 | olddquot1 = olddquot2 = NULL; | |
303 | udqp = gdqp = NULL; | |
304 | ||
305 | /* | |
306 | * If disk quotas is on, we make sure that the dquots do exist on disk, | |
307 | * before we start any other transactions. Trying to do this later | |
308 | * is messy. We don't care to take a readlock to look at the ids | |
309 | * in inode here, because we can't hold it across the trans_reserve. | |
310 | * If the IDs do change before we take the ilock, we're covered | |
311 | * because the i_*dquot fields will get updated anyway. | |
312 | */ | |
c8ad20ff NS |
313 | if (XFS_IS_QUOTA_ON(mp) && |
314 | (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID))) { | |
1da177e4 LT |
315 | uint qflags = 0; |
316 | ||
c8ad20ff | 317 | if ((mask & XFS_AT_UID) && XFS_IS_UQUOTA_ON(mp)) { |
1da177e4 LT |
318 | uid = vap->va_uid; |
319 | qflags |= XFS_QMOPT_UQUOTA; | |
320 | } else { | |
321 | uid = ip->i_d.di_uid; | |
322 | } | |
c8ad20ff | 323 | if ((mask & XFS_AT_GID) && XFS_IS_GQUOTA_ON(mp)) { |
1da177e4 LT |
324 | gid = vap->va_gid; |
325 | qflags |= XFS_QMOPT_GQUOTA; | |
326 | } else { | |
327 | gid = ip->i_d.di_gid; | |
328 | } | |
c8ad20ff NS |
329 | if ((mask & XFS_AT_PROJID) && XFS_IS_PQUOTA_ON(mp)) { |
330 | projid = vap->va_projid; | |
331 | qflags |= XFS_QMOPT_PQUOTA; | |
332 | } else { | |
333 | projid = ip->i_d.di_projid; | |
334 | } | |
1da177e4 LT |
335 | /* |
336 | * We take a reference when we initialize udqp and gdqp, | |
337 | * so it is important that we never blindly double trip on | |
338 | * the same variable. See xfs_create() for an example. | |
339 | */ | |
340 | ASSERT(udqp == NULL); | |
341 | ASSERT(gdqp == NULL); | |
c8ad20ff NS |
342 | code = XFS_QM_DQVOPALLOC(mp, ip, uid, gid, projid, qflags, |
343 | &udqp, &gdqp); | |
1da177e4 | 344 | if (code) |
014c2544 | 345 | return code; |
1da177e4 LT |
346 | } |
347 | ||
348 | /* | |
349 | * For the other attributes, we acquire the inode lock and | |
350 | * first do an error checking pass. | |
351 | */ | |
352 | tp = NULL; | |
353 | lock_flags = XFS_ILOCK_EXCL; | |
5fcbab35 DR |
354 | if (flags & ATTR_NOLOCK) |
355 | need_iolock = 0; | |
1da177e4 LT |
356 | if (!(mask & XFS_AT_SIZE)) { |
357 | if ((mask != (XFS_AT_CTIME|XFS_AT_ATIME|XFS_AT_MTIME)) || | |
358 | (mp->m_flags & XFS_MOUNT_WSYNC)) { | |
359 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); | |
360 | commit_flags = 0; | |
361 | if ((code = xfs_trans_reserve(tp, 0, | |
362 | XFS_ICHANGE_LOG_RES(mp), 0, | |
363 | 0, 0))) { | |
364 | lock_flags = 0; | |
365 | goto error_return; | |
366 | } | |
367 | } | |
368 | } else { | |
369 | if (DM_EVENT_ENABLED (vp->v_vfsp, ip, DM_EVENT_TRUNCATE) && | |
370 | !(flags & ATTR_DMI)) { | |
371 | int dmflags = AT_DELAY_FLAG(flags) | DM_SEM_FLAG_WR; | |
372 | code = XFS_SEND_DATA(mp, DM_EVENT_TRUNCATE, vp, | |
373 | vap->va_size, 0, dmflags, NULL); | |
374 | if (code) { | |
375 | lock_flags = 0; | |
376 | goto error_return; | |
377 | } | |
378 | } | |
379 | if (need_iolock) | |
380 | lock_flags |= XFS_IOLOCK_EXCL; | |
381 | } | |
382 | ||
383 | xfs_ilock(ip, lock_flags); | |
384 | ||
385 | /* boolean: are we the file owner? */ | |
386 | file_owner = (current_fsuid(credp) == ip->i_d.di_uid); | |
387 | ||
388 | /* | |
389 | * Change various properties of a file. | |
390 | * Only the owner or users with CAP_FOWNER | |
391 | * capability may do these things. | |
392 | */ | |
393 | if (mask & | |
394 | (XFS_AT_MODE|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_UID| | |
395 | XFS_AT_GID|XFS_AT_PROJID)) { | |
396 | /* | |
397 | * CAP_FOWNER overrides the following restrictions: | |
398 | * | |
399 | * The user ID of the calling process must be equal | |
400 | * to the file owner ID, except in cases where the | |
401 | * CAP_FSETID capability is applicable. | |
402 | */ | |
403 | if (!file_owner && !capable(CAP_FOWNER)) { | |
404 | code = XFS_ERROR(EPERM); | |
405 | goto error_return; | |
406 | } | |
407 | ||
408 | /* | |
409 | * CAP_FSETID overrides the following restrictions: | |
410 | * | |
411 | * The effective user ID of the calling process shall match | |
412 | * the file owner when setting the set-user-ID and | |
413 | * set-group-ID bits on that file. | |
414 | * | |
415 | * The effective group ID or one of the supplementary group | |
416 | * IDs of the calling process shall match the group owner of | |
417 | * the file when setting the set-group-ID bit on that file | |
418 | */ | |
419 | if (mask & XFS_AT_MODE) { | |
420 | mode_t m = 0; | |
421 | ||
422 | if ((vap->va_mode & S_ISUID) && !file_owner) | |
423 | m |= S_ISUID; | |
424 | if ((vap->va_mode & S_ISGID) && | |
425 | !in_group_p((gid_t)ip->i_d.di_gid)) | |
426 | m |= S_ISGID; | |
427 | #if 0 | |
428 | /* Linux allows this, Irix doesn't. */ | |
0432dab2 | 429 | if ((vap->va_mode & S_ISVTX) && !VN_ISDIR(vp)) |
1da177e4 LT |
430 | m |= S_ISVTX; |
431 | #endif | |
432 | if (m && !capable(CAP_FSETID)) | |
433 | vap->va_mode &= ~m; | |
434 | } | |
435 | } | |
436 | ||
437 | /* | |
438 | * Change file ownership. Must be the owner or privileged. | |
439 | * If the system was configured with the "restricted_chown" | |
440 | * option, the owner is not permitted to give away the file, | |
441 | * and can change the group id only to a group of which he | |
442 | * or she is a member. | |
443 | */ | |
444 | if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) { | |
445 | /* | |
446 | * These IDs could have changed since we last looked at them. | |
447 | * But, we're assured that if the ownership did change | |
448 | * while we didn't have the inode locked, inode's dquot(s) | |
449 | * would have changed also. | |
450 | */ | |
451 | iuid = ip->i_d.di_uid; | |
452 | iprojid = ip->i_d.di_projid; | |
453 | igid = ip->i_d.di_gid; | |
454 | gid = (mask & XFS_AT_GID) ? vap->va_gid : igid; | |
455 | uid = (mask & XFS_AT_UID) ? vap->va_uid : iuid; | |
456 | projid = (mask & XFS_AT_PROJID) ? (xfs_prid_t)vap->va_projid : | |
457 | iprojid; | |
458 | ||
459 | /* | |
460 | * CAP_CHOWN overrides the following restrictions: | |
461 | * | |
462 | * If _POSIX_CHOWN_RESTRICTED is defined, this capability | |
463 | * shall override the restriction that a process cannot | |
464 | * change the user ID of a file it owns and the restriction | |
465 | * that the group ID supplied to the chown() function | |
466 | * shall be equal to either the group ID or one of the | |
467 | * supplementary group IDs of the calling process. | |
1da177e4 LT |
468 | */ |
469 | if (restricted_chown && | |
470 | (iuid != uid || (igid != gid && | |
471 | !in_group_p((gid_t)gid))) && | |
472 | !capable(CAP_CHOWN)) { | |
473 | code = XFS_ERROR(EPERM); | |
474 | goto error_return; | |
475 | } | |
476 | /* | |
c8ad20ff | 477 | * Do a quota reservation only if uid/projid/gid is actually |
1da177e4 LT |
478 | * going to change. |
479 | */ | |
480 | if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) || | |
c8ad20ff | 481 | (XFS_IS_PQUOTA_ON(mp) && iprojid != projid) || |
1da177e4 LT |
482 | (XFS_IS_GQUOTA_ON(mp) && igid != gid)) { |
483 | ASSERT(tp); | |
484 | code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp, | |
485 | capable(CAP_FOWNER) ? | |
486 | XFS_QMOPT_FORCE_RES : 0); | |
487 | if (code) /* out of quota */ | |
488 | goto error_return; | |
489 | } | |
490 | } | |
491 | ||
492 | /* | |
493 | * Truncate file. Must have write permission and not be a directory. | |
494 | */ | |
495 | if (mask & XFS_AT_SIZE) { | |
496 | /* Short circuit the truncate case for zero length files */ | |
497 | if ((vap->va_size == 0) && | |
ba87ea69 | 498 | (ip->i_size == 0) && (ip->i_d.di_nextents == 0)) { |
1da177e4 LT |
499 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
500 | lock_flags &= ~XFS_ILOCK_EXCL; | |
501 | if (mask & XFS_AT_CTIME) | |
502 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
503 | code = 0; | |
504 | goto error_return; | |
505 | } | |
506 | ||
0432dab2 | 507 | if (VN_ISDIR(vp)) { |
1da177e4 LT |
508 | code = XFS_ERROR(EISDIR); |
509 | goto error_return; | |
0432dab2 | 510 | } else if (!VN_ISREG(vp)) { |
1da177e4 LT |
511 | code = XFS_ERROR(EINVAL); |
512 | goto error_return; | |
513 | } | |
514 | /* | |
515 | * Make sure that the dquots are attached to the inode. | |
516 | */ | |
517 | if ((code = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED))) | |
518 | goto error_return; | |
519 | } | |
520 | ||
521 | /* | |
522 | * Change file access or modified times. | |
523 | */ | |
524 | if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) { | |
525 | if (!file_owner) { | |
526 | if ((flags & ATTR_UTIME) && | |
527 | !capable(CAP_FOWNER)) { | |
528 | code = XFS_ERROR(EPERM); | |
529 | goto error_return; | |
530 | } | |
531 | } | |
532 | } | |
533 | ||
534 | /* | |
535 | * Change extent size or realtime flag. | |
536 | */ | |
537 | if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) { | |
538 | /* | |
539 | * Can't change extent size if any extents are allocated. | |
540 | */ | |
e94af02a | 541 | if (ip->i_d.di_nextents && (mask & XFS_AT_EXTSIZE) && |
1da177e4 LT |
542 | ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != |
543 | vap->va_extsize) ) { | |
544 | code = XFS_ERROR(EINVAL); /* EFBIG? */ | |
545 | goto error_return; | |
546 | } | |
547 | ||
1da177e4 LT |
548 | /* |
549 | * Can't change realtime flag if any extents are allocated. | |
550 | */ | |
e94af02a ES |
551 | if ((ip->i_d.di_nextents || ip->i_delayed_blks) && |
552 | (mask & XFS_AT_XFLAGS) && | |
1da177e4 LT |
553 | (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) != |
554 | (vap->va_xflags & XFS_XFLAG_REALTIME)) { | |
555 | code = XFS_ERROR(EINVAL); /* EFBIG? */ | |
556 | goto error_return; | |
557 | } | |
558 | /* | |
559 | * Extent size must be a multiple of the appropriate block | |
560 | * size, if set at all. | |
561 | */ | |
562 | if ((mask & XFS_AT_EXTSIZE) && vap->va_extsize != 0) { | |
563 | xfs_extlen_t size; | |
564 | ||
565 | if ((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) || | |
566 | ((mask & XFS_AT_XFLAGS) && | |
567 | (vap->va_xflags & XFS_XFLAG_REALTIME))) { | |
568 | size = mp->m_sb.sb_rextsize << | |
569 | mp->m_sb.sb_blocklog; | |
570 | } else { | |
571 | size = mp->m_sb.sb_blocksize; | |
572 | } | |
573 | if (vap->va_extsize % size) { | |
574 | code = XFS_ERROR(EINVAL); | |
575 | goto error_return; | |
576 | } | |
577 | } | |
578 | /* | |
579 | * If realtime flag is set then must have realtime data. | |
580 | */ | |
581 | if ((mask & XFS_AT_XFLAGS) && | |
582 | (vap->va_xflags & XFS_XFLAG_REALTIME)) { | |
583 | if ((mp->m_sb.sb_rblocks == 0) || | |
584 | (mp->m_sb.sb_rextsize == 0) || | |
585 | (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { | |
586 | code = XFS_ERROR(EINVAL); | |
587 | goto error_return; | |
588 | } | |
589 | } | |
590 | ||
591 | /* | |
592 | * Can't modify an immutable/append-only file unless | |
593 | * we have appropriate permission. | |
594 | */ | |
595 | if ((mask & XFS_AT_XFLAGS) && | |
596 | (ip->i_d.di_flags & | |
597 | (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || | |
598 | (vap->va_xflags & | |
599 | (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && | |
600 | !capable(CAP_LINUX_IMMUTABLE)) { | |
601 | code = XFS_ERROR(EPERM); | |
602 | goto error_return; | |
603 | } | |
604 | } | |
605 | ||
606 | /* | |
607 | * Now we can make the changes. Before we join the inode | |
608 | * to the transaction, if XFS_AT_SIZE is set then take care of | |
609 | * the part of the truncation that must be done without the | |
610 | * inode lock. This needs to be done before joining the inode | |
611 | * to the transaction, because the inode cannot be unlocked | |
612 | * once it is a part of the transaction. | |
613 | */ | |
614 | if (mask & XFS_AT_SIZE) { | |
615 | code = 0; | |
ba87ea69 | 616 | if ((vap->va_size > ip->i_size) && |
374e2ac3 | 617 | (flags & ATTR_NOSIZETOK) == 0) { |
1da177e4 | 618 | code = xfs_igrow_start(ip, vap->va_size, credp); |
374e2ac3 | 619 | } |
1da177e4 | 620 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
9fa8046f | 621 | vn_iowait(vp); /* wait for the completion of any pending DIOs */ |
1da177e4 LT |
622 | if (!code) |
623 | code = xfs_itruncate_data(ip, vap->va_size); | |
624 | if (code) { | |
625 | ASSERT(tp == NULL); | |
626 | lock_flags &= ~XFS_ILOCK_EXCL; | |
627 | ASSERT(lock_flags == XFS_IOLOCK_EXCL); | |
628 | goto error_return; | |
629 | } | |
630 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); | |
631 | if ((code = xfs_trans_reserve(tp, 0, | |
632 | XFS_ITRUNCATE_LOG_RES(mp), 0, | |
633 | XFS_TRANS_PERM_LOG_RES, | |
634 | XFS_ITRUNCATE_LOG_COUNT))) { | |
635 | xfs_trans_cancel(tp, 0); | |
636 | if (need_iolock) | |
637 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
638 | return code; | |
639 | } | |
640 | commit_flags = XFS_TRANS_RELEASE_LOG_RES; | |
641 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
642 | } | |
643 | ||
644 | if (tp) { | |
645 | xfs_trans_ijoin(tp, ip, lock_flags); | |
646 | xfs_trans_ihold(tp, ip); | |
647 | } | |
648 | ||
649 | /* determine whether mandatory locking mode changes */ | |
650 | mandlock_before = MANDLOCK(vp, ip->i_d.di_mode); | |
651 | ||
652 | /* | |
653 | * Truncate file. Must have write permission and not be a directory. | |
654 | */ | |
655 | if (mask & XFS_AT_SIZE) { | |
ba87ea69 | 656 | if (vap->va_size > ip->i_size) { |
1da177e4 LT |
657 | xfs_igrow_finish(tp, ip, vap->va_size, |
658 | !(flags & ATTR_DMI)); | |
ba87ea69 | 659 | } else if ((vap->va_size <= ip->i_size) || |
1da177e4 LT |
660 | ((vap->va_size == 0) && ip->i_d.di_nextents)) { |
661 | /* | |
662 | * signal a sync transaction unless | |
663 | * we're truncating an already unlinked | |
664 | * file on a wsync filesystem | |
665 | */ | |
666 | code = xfs_itruncate_finish(&tp, ip, | |
667 | (xfs_fsize_t)vap->va_size, | |
668 | XFS_DATA_FORK, | |
669 | ((ip->i_d.di_nlink != 0 || | |
670 | !(mp->m_flags & XFS_MOUNT_WSYNC)) | |
671 | ? 1 : 0)); | |
7d4fb40a | 672 | if (code) |
1da177e4 | 673 | goto abort_return; |
7d4fb40a NS |
674 | /* |
675 | * Truncated "down", so we're removing references | |
676 | * to old data here - if we now delay flushing for | |
677 | * a long time, we expose ourselves unduly to the | |
678 | * notorious NULL files problem. So, we mark this | |
679 | * vnode and flush it when the file is closed, and | |
680 | * do not wait the usual (long) time for writeout. | |
681 | */ | |
682 | VTRUNCATE(vp); | |
1da177e4 LT |
683 | } |
684 | /* | |
685 | * Have to do this even if the file's size doesn't change. | |
686 | */ | |
687 | timeflags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; | |
688 | } | |
689 | ||
690 | /* | |
691 | * Change file access modes. | |
692 | */ | |
693 | if (mask & XFS_AT_MODE) { | |
694 | ip->i_d.di_mode &= S_IFMT; | |
695 | ip->i_d.di_mode |= vap->va_mode & ~S_IFMT; | |
696 | ||
697 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); | |
698 | timeflags |= XFS_ICHGTIME_CHG; | |
699 | } | |
700 | ||
701 | /* | |
702 | * Change file ownership. Must be the owner or privileged. | |
703 | * If the system was configured with the "restricted_chown" | |
704 | * option, the owner is not permitted to give away the file, | |
705 | * and can change the group id only to a group of which he | |
706 | * or she is a member. | |
707 | */ | |
708 | if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) { | |
709 | /* | |
710 | * CAP_FSETID overrides the following restrictions: | |
711 | * | |
712 | * The set-user-ID and set-group-ID bits of a file will be | |
713 | * cleared upon successful return from chown() | |
714 | */ | |
715 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && | |
716 | !capable(CAP_FSETID)) { | |
717 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); | |
718 | } | |
719 | ||
720 | /* | |
721 | * Change the ownerships and register quota modifications | |
722 | * in the transaction. | |
723 | */ | |
724 | if (iuid != uid) { | |
725 | if (XFS_IS_UQUOTA_ON(mp)) { | |
726 | ASSERT(mask & XFS_AT_UID); | |
727 | ASSERT(udqp); | |
728 | olddquot1 = XFS_QM_DQVOPCHOWN(mp, tp, ip, | |
729 | &ip->i_udquot, udqp); | |
730 | } | |
731 | ip->i_d.di_uid = uid; | |
732 | } | |
733 | if (igid != gid) { | |
734 | if (XFS_IS_GQUOTA_ON(mp)) { | |
c8ad20ff | 735 | ASSERT(!XFS_IS_PQUOTA_ON(mp)); |
1da177e4 LT |
736 | ASSERT(mask & XFS_AT_GID); |
737 | ASSERT(gdqp); | |
738 | olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip, | |
739 | &ip->i_gdquot, gdqp); | |
740 | } | |
741 | ip->i_d.di_gid = gid; | |
742 | } | |
743 | if (iprojid != projid) { | |
c8ad20ff NS |
744 | if (XFS_IS_PQUOTA_ON(mp)) { |
745 | ASSERT(!XFS_IS_GQUOTA_ON(mp)); | |
746 | ASSERT(mask & XFS_AT_PROJID); | |
747 | ASSERT(gdqp); | |
748 | olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip, | |
749 | &ip->i_gdquot, gdqp); | |
750 | } | |
1da177e4 LT |
751 | ip->i_d.di_projid = projid; |
752 | /* | |
753 | * We may have to rev the inode as well as | |
754 | * the superblock version number since projids didn't | |
755 | * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. | |
756 | */ | |
757 | if (ip->i_d.di_version == XFS_DINODE_VERSION_1) | |
758 | xfs_bump_ino_vers2(tp, ip); | |
759 | } | |
760 | ||
761 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); | |
762 | timeflags |= XFS_ICHGTIME_CHG; | |
763 | } | |
764 | ||
765 | ||
766 | /* | |
767 | * Change file access or modified times. | |
768 | */ | |
769 | if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) { | |
770 | if (mask & XFS_AT_ATIME) { | |
771 | ip->i_d.di_atime.t_sec = vap->va_atime.tv_sec; | |
772 | ip->i_d.di_atime.t_nsec = vap->va_atime.tv_nsec; | |
773 | ip->i_update_core = 1; | |
774 | timeflags &= ~XFS_ICHGTIME_ACC; | |
775 | } | |
776 | if (mask & XFS_AT_MTIME) { | |
777 | ip->i_d.di_mtime.t_sec = vap->va_mtime.tv_sec; | |
778 | ip->i_d.di_mtime.t_nsec = vap->va_mtime.tv_nsec; | |
779 | timeflags &= ~XFS_ICHGTIME_MOD; | |
780 | timeflags |= XFS_ICHGTIME_CHG; | |
781 | } | |
782 | if (tp && (flags & ATTR_UTIME)) | |
783 | xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); | |
784 | } | |
785 | ||
786 | /* | |
787 | * Change XFS-added attributes. | |
788 | */ | |
789 | if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) { | |
790 | if (mask & XFS_AT_EXTSIZE) { | |
791 | /* | |
792 | * Converting bytes to fs blocks. | |
793 | */ | |
794 | ip->i_d.di_extsize = vap->va_extsize >> | |
795 | mp->m_sb.sb_blocklog; | |
796 | } | |
797 | if (mask & XFS_AT_XFLAGS) { | |
798 | uint di_flags; | |
799 | ||
800 | /* can't set PREALLOC this way, just preserve it */ | |
801 | di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); | |
802 | if (vap->va_xflags & XFS_XFLAG_IMMUTABLE) | |
803 | di_flags |= XFS_DIFLAG_IMMUTABLE; | |
804 | if (vap->va_xflags & XFS_XFLAG_APPEND) | |
805 | di_flags |= XFS_DIFLAG_APPEND; | |
806 | if (vap->va_xflags & XFS_XFLAG_SYNC) | |
807 | di_flags |= XFS_DIFLAG_SYNC; | |
808 | if (vap->va_xflags & XFS_XFLAG_NOATIME) | |
809 | di_flags |= XFS_DIFLAG_NOATIME; | |
810 | if (vap->va_xflags & XFS_XFLAG_NODUMP) | |
811 | di_flags |= XFS_DIFLAG_NODUMP; | |
365ca83d NS |
812 | if (vap->va_xflags & XFS_XFLAG_PROJINHERIT) |
813 | di_flags |= XFS_DIFLAG_PROJINHERIT; | |
d3446eac BN |
814 | if (vap->va_xflags & XFS_XFLAG_NODEFRAG) |
815 | di_flags |= XFS_DIFLAG_NODEFRAG; | |
1da177e4 LT |
816 | if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) { |
817 | if (vap->va_xflags & XFS_XFLAG_RTINHERIT) | |
818 | di_flags |= XFS_DIFLAG_RTINHERIT; | |
819 | if (vap->va_xflags & XFS_XFLAG_NOSYMLINKS) | |
820 | di_flags |= XFS_DIFLAG_NOSYMLINKS; | |
dd9f438e NS |
821 | if (vap->va_xflags & XFS_XFLAG_EXTSZINHERIT) |
822 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; | |
823 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) { | |
1da177e4 LT |
824 | if (vap->va_xflags & XFS_XFLAG_REALTIME) { |
825 | di_flags |= XFS_DIFLAG_REALTIME; | |
826 | ip->i_iocore.io_flags |= XFS_IOCORE_RT; | |
827 | } else { | |
828 | ip->i_iocore.io_flags &= ~XFS_IOCORE_RT; | |
829 | } | |
dd9f438e NS |
830 | if (vap->va_xflags & XFS_XFLAG_EXTSIZE) |
831 | di_flags |= XFS_DIFLAG_EXTSIZE; | |
1da177e4 LT |
832 | } |
833 | ip->i_d.di_flags = di_flags; | |
834 | } | |
835 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
836 | timeflags |= XFS_ICHGTIME_CHG; | |
837 | } | |
838 | ||
839 | /* | |
840 | * Change file inode change time only if XFS_AT_CTIME set | |
841 | * AND we have been called by a DMI function. | |
842 | */ | |
843 | ||
844 | if ( (flags & ATTR_DMI) && (mask & XFS_AT_CTIME) ) { | |
845 | ip->i_d.di_ctime.t_sec = vap->va_ctime.tv_sec; | |
846 | ip->i_d.di_ctime.t_nsec = vap->va_ctime.tv_nsec; | |
847 | ip->i_update_core = 1; | |
848 | timeflags &= ~XFS_ICHGTIME_CHG; | |
849 | } | |
850 | ||
851 | /* | |
852 | * Send out timestamp changes that need to be set to the | |
853 | * current time. Not done when called by a DMI function. | |
854 | */ | |
855 | if (timeflags && !(flags & ATTR_DMI)) | |
856 | xfs_ichgtime(ip, timeflags); | |
857 | ||
858 | XFS_STATS_INC(xs_ig_attrchg); | |
859 | ||
860 | /* | |
861 | * If this is a synchronous mount, make sure that the | |
862 | * transaction goes to disk before returning to the user. | |
863 | * This is slightly sub-optimal in that truncates require | |
c41564b5 | 864 | * two sync transactions instead of one for wsync filesystems. |
1da177e4 LT |
865 | * One for the truncate and one for the timestamps since we |
866 | * don't want to change the timestamps unless we're sure the | |
867 | * truncate worked. Truncates are less than 1% of the laddis | |
868 | * mix so this probably isn't worth the trouble to optimize. | |
869 | */ | |
870 | code = 0; | |
871 | if (tp) { | |
872 | if (mp->m_flags & XFS_MOUNT_WSYNC) | |
873 | xfs_trans_set_sync(tp); | |
874 | ||
1c72bf90 | 875 | code = xfs_trans_commit(tp, commit_flags); |
1da177e4 LT |
876 | } |
877 | ||
878 | /* | |
879 | * If the (regular) file's mandatory locking mode changed, then | |
880 | * notify the vnode. We do this under the inode lock to prevent | |
881 | * racing calls to vop_vnode_change. | |
882 | */ | |
883 | mandlock_after = MANDLOCK(vp, ip->i_d.di_mode); | |
884 | if (mandlock_before != mandlock_after) { | |
67fcaa73 | 885 | bhv_vop_vnode_change(vp, VCHANGE_FLAGS_ENF_LOCKING, |
1da177e4 LT |
886 | mandlock_after); |
887 | } | |
888 | ||
889 | xfs_iunlock(ip, lock_flags); | |
890 | ||
891 | /* | |
892 | * Release any dquot(s) the inode had kept before chown. | |
893 | */ | |
894 | XFS_QM_DQRELE(mp, olddquot1); | |
895 | XFS_QM_DQRELE(mp, olddquot2); | |
896 | XFS_QM_DQRELE(mp, udqp); | |
897 | XFS_QM_DQRELE(mp, gdqp); | |
898 | ||
899 | if (code) { | |
900 | return code; | |
901 | } | |
902 | ||
903 | if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_ATTRIBUTE) && | |
904 | !(flags & ATTR_DMI)) { | |
905 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, vp, DM_RIGHT_NULL, | |
906 | NULL, DM_RIGHT_NULL, NULL, NULL, | |
907 | 0, 0, AT_DELAY_FLAG(flags)); | |
908 | } | |
909 | return 0; | |
910 | ||
911 | abort_return: | |
912 | commit_flags |= XFS_TRANS_ABORT; | |
913 | /* FALLTHROUGH */ | |
914 | error_return: | |
915 | XFS_QM_DQRELE(mp, udqp); | |
916 | XFS_QM_DQRELE(mp, gdqp); | |
917 | if (tp) { | |
918 | xfs_trans_cancel(tp, commit_flags); | |
919 | } | |
920 | if (lock_flags != 0) { | |
921 | xfs_iunlock(ip, lock_flags); | |
922 | } | |
923 | return code; | |
924 | } | |
925 | ||
926 | ||
927 | /* | |
928 | * xfs_access | |
929 | * Null conversion from vnode mode bits to inode mode bits, as in efs. | |
930 | */ | |
931 | STATIC int | |
932 | xfs_access( | |
933 | bhv_desc_t *bdp, | |
934 | int mode, | |
935 | cred_t *credp) | |
936 | { | |
937 | xfs_inode_t *ip; | |
938 | int error; | |
939 | ||
940 | vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__, | |
941 | (inst_t *)__return_address); | |
942 | ||
943 | ip = XFS_BHVTOI(bdp); | |
944 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
945 | error = xfs_iaccess(ip, mode, credp); | |
946 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
947 | return error; | |
948 | } | |
949 | ||
950 | ||
7d4fb40a NS |
951 | /* |
952 | * The maximum pathlen is 1024 bytes. Since the minimum file system | |
953 | * blocksize is 512 bytes, we can get a max of 2 extents back from | |
954 | * bmapi. | |
955 | */ | |
956 | #define SYMLINK_MAPS 2 | |
957 | ||
1da177e4 LT |
958 | /* |
959 | * xfs_readlink | |
960 | * | |
961 | */ | |
962 | STATIC int | |
963 | xfs_readlink( | |
964 | bhv_desc_t *bdp, | |
965 | uio_t *uiop, | |
966 | int ioflags, | |
967 | cred_t *credp) | |
968 | { | |
969 | xfs_inode_t *ip; | |
970 | int count; | |
971 | xfs_off_t offset; | |
972 | int pathlen; | |
67fcaa73 | 973 | bhv_vnode_t *vp; |
1da177e4 LT |
974 | int error = 0; |
975 | xfs_mount_t *mp; | |
976 | int nmaps; | |
977 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
978 | xfs_daddr_t d; | |
979 | int byte_cnt; | |
980 | int n; | |
981 | xfs_buf_t *bp; | |
982 | ||
983 | vp = BHV_TO_VNODE(bdp); | |
984 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); | |
985 | ||
986 | ip = XFS_BHVTOI(bdp); | |
987 | mp = ip->i_mount; | |
988 | ||
989 | if (XFS_FORCED_SHUTDOWN(mp)) | |
990 | return XFS_ERROR(EIO); | |
991 | ||
992 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
993 | ||
994 | ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK); | |
995 | ||
996 | offset = uiop->uio_offset; | |
997 | count = uiop->uio_resid; | |
998 | ||
999 | if (offset < 0) { | |
1000 | error = XFS_ERROR(EINVAL); | |
1001 | goto error_return; | |
1002 | } | |
1003 | if (count <= 0) { | |
1004 | error = 0; | |
1005 | goto error_return; | |
1006 | } | |
1007 | ||
1da177e4 LT |
1008 | /* |
1009 | * See if the symlink is stored inline. | |
1010 | */ | |
1011 | pathlen = (int)ip->i_d.di_size; | |
1012 | ||
1013 | if (ip->i_df.if_flags & XFS_IFINLINE) { | |
70a50528 | 1014 | error = xfs_uio_read(ip->i_df.if_u1.if_data, pathlen, uiop); |
1da177e4 LT |
1015 | } |
1016 | else { | |
1017 | /* | |
1018 | * Symlink not inline. Call bmap to get it in. | |
1019 | */ | |
1020 | nmaps = SYMLINK_MAPS; | |
1021 | ||
1022 | error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen), | |
3e57ecf6 | 1023 | 0, NULL, 0, mval, &nmaps, NULL, NULL); |
1da177e4 LT |
1024 | |
1025 | if (error) { | |
1026 | goto error_return; | |
1027 | } | |
1028 | ||
1029 | for (n = 0; n < nmaps; n++) { | |
1030 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
1031 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
1032 | bp = xfs_buf_read(mp->m_ddev_targp, d, | |
1033 | BTOBB(byte_cnt), 0); | |
1034 | error = XFS_BUF_GETERROR(bp); | |
1035 | if (error) { | |
1036 | xfs_ioerror_alert("xfs_readlink", | |
1037 | ip->i_mount, bp, XFS_BUF_ADDR(bp)); | |
1038 | xfs_buf_relse(bp); | |
1039 | goto error_return; | |
1040 | } | |
1041 | if (pathlen < byte_cnt) | |
1042 | byte_cnt = pathlen; | |
1043 | pathlen -= byte_cnt; | |
1044 | ||
70a50528 | 1045 | error = xfs_uio_read(XFS_BUF_PTR(bp), byte_cnt, uiop); |
1da177e4 LT |
1046 | xfs_buf_relse (bp); |
1047 | } | |
1048 | ||
1049 | } | |
1050 | ||
1da177e4 | 1051 | error_return: |
1da177e4 | 1052 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
1da177e4 LT |
1053 | return error; |
1054 | } | |
1055 | ||
1056 | ||
1057 | /* | |
1058 | * xfs_fsync | |
1059 | * | |
1060 | * This is called to sync the inode and its data out to disk. | |
1061 | * We need to hold the I/O lock while flushing the data, and | |
1062 | * the inode lock while flushing the inode. The inode lock CANNOT | |
1063 | * be held while flushing the data, so acquire after we're done | |
1064 | * with that. | |
1065 | */ | |
1066 | STATIC int | |
1067 | xfs_fsync( | |
1068 | bhv_desc_t *bdp, | |
1069 | int flag, | |
1070 | cred_t *credp, | |
1071 | xfs_off_t start, | |
1072 | xfs_off_t stop) | |
1073 | { | |
1074 | xfs_inode_t *ip; | |
1075 | xfs_trans_t *tp; | |
1076 | int error; | |
f538d4da | 1077 | int log_flushed = 0, changed = 1; |
1da177e4 LT |
1078 | |
1079 | vn_trace_entry(BHV_TO_VNODE(bdp), | |
1080 | __FUNCTION__, (inst_t *)__return_address); | |
1081 | ||
1082 | ip = XFS_BHVTOI(bdp); | |
1083 | ||
1084 | ASSERT(start >= 0 && stop >= -1); | |
1085 | ||
1086 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) | |
1087 | return XFS_ERROR(EIO); | |
1088 | ||
1089 | /* | |
1090 | * We always need to make sure that the required inode state | |
1091 | * is safe on disk. The vnode might be clean but because | |
1092 | * of committed transactions that haven't hit the disk yet. | |
1093 | * Likewise, there could be unflushed non-transactional | |
1094 | * changes to the inode core that have to go to disk. | |
1095 | * | |
1096 | * The following code depends on one assumption: that | |
1097 | * any transaction that changes an inode logs the core | |
1098 | * because it has to change some field in the inode core | |
1099 | * (typically nextents or nblocks). That assumption | |
1100 | * implies that any transactions against an inode will | |
1101 | * catch any non-transactional updates. If inode-altering | |
1102 | * transactions exist that violate this assumption, the | |
1103 | * code breaks. Right now, it figures that if the involved | |
1104 | * update_* field is clear and the inode is unpinned, the | |
1105 | * inode is clean. Either it's been flushed or it's been | |
1106 | * committed and the commit has hit the disk unpinning the inode. | |
1107 | * (Note that xfs_inode_item_format() called at commit clears | |
1108 | * the update_* fields.) | |
1109 | */ | |
1110 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
1111 | ||
1112 | /* If we are flushing data then we care about update_size | |
1113 | * being set, otherwise we care about update_core | |
1114 | */ | |
1115 | if ((flag & FSYNC_DATA) ? | |
1116 | (ip->i_update_size == 0) : | |
1117 | (ip->i_update_core == 0)) { | |
1118 | /* | |
1119 | * Timestamps/size haven't changed since last inode | |
1120 | * flush or inode transaction commit. That means | |
1121 | * either nothing got written or a transaction | |
1122 | * committed which caught the updates. If the | |
1123 | * latter happened and the transaction hasn't | |
1124 | * hit the disk yet, the inode will be still | |
1125 | * be pinned. If it is, force the log. | |
1126 | */ | |
1127 | ||
1128 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
1129 | ||
1130 | if (xfs_ipincount(ip)) { | |
f538d4da | 1131 | _xfs_log_force(ip->i_mount, (xfs_lsn_t)0, |
1da177e4 LT |
1132 | XFS_LOG_FORCE | |
1133 | ((flag & FSYNC_WAIT) | |
f538d4da CH |
1134 | ? XFS_LOG_SYNC : 0), |
1135 | &log_flushed); | |
1136 | } else { | |
1137 | /* | |
1138 | * If the inode is not pinned and nothing | |
1139 | * has changed we don't need to flush the | |
1140 | * cache. | |
1141 | */ | |
1142 | changed = 0; | |
1da177e4 LT |
1143 | } |
1144 | error = 0; | |
1145 | } else { | |
1146 | /* | |
1147 | * Kick off a transaction to log the inode | |
1148 | * core to get the updates. Make it | |
1149 | * sync if FSYNC_WAIT is passed in (which | |
1150 | * is done by everybody but specfs). The | |
1151 | * sync transaction will also force the log. | |
1152 | */ | |
1153 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
1154 | tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS); | |
1155 | if ((error = xfs_trans_reserve(tp, 0, | |
1156 | XFS_FSYNC_TS_LOG_RES(ip->i_mount), | |
1157 | 0, 0, 0))) { | |
1158 | xfs_trans_cancel(tp, 0); | |
1159 | return error; | |
1160 | } | |
1161 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1162 | ||
1163 | /* | |
1164 | * Note - it's possible that we might have pushed | |
1165 | * ourselves out of the way during trans_reserve | |
1166 | * which would flush the inode. But there's no | |
1167 | * guarantee that the inode buffer has actually | |
1168 | * gone out yet (it's delwri). Plus the buffer | |
1169 | * could be pinned anyway if it's part of an | |
1170 | * inode in another recent transaction. So we | |
1171 | * play it safe and fire off the transaction anyway. | |
1172 | */ | |
1173 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
1174 | xfs_trans_ihold(tp, ip); | |
1175 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1176 | if (flag & FSYNC_WAIT) | |
1177 | xfs_trans_set_sync(tp); | |
1c72bf90 | 1178 | error = _xfs_trans_commit(tp, 0, &log_flushed); |
1da177e4 LT |
1179 | |
1180 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1181 | } | |
f538d4da CH |
1182 | |
1183 | if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) { | |
1184 | /* | |
1185 | * If the log write didn't issue an ordered tag we need | |
1186 | * to flush the disk cache for the data device now. | |
1187 | */ | |
1188 | if (!log_flushed) | |
1189 | xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp); | |
1190 | ||
1191 | /* | |
1192 | * If this inode is on the RT dev we need to flush that | |
c41564b5 | 1193 | * cache as well. |
f538d4da CH |
1194 | */ |
1195 | if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) | |
1196 | xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp); | |
1197 | } | |
1198 | ||
1da177e4 LT |
1199 | return error; |
1200 | } | |
1201 | ||
1202 | /* | |
92dfe8d2 DC |
1203 | * This is called by xfs_inactive to free any blocks beyond eof |
1204 | * when the link count isn't zero and by xfs_dm_punch_hole() when | |
1205 | * punching a hole to EOF. | |
1da177e4 | 1206 | */ |
92dfe8d2 DC |
1207 | int |
1208 | xfs_free_eofblocks( | |
1da177e4 | 1209 | xfs_mount_t *mp, |
92dfe8d2 DC |
1210 | xfs_inode_t *ip, |
1211 | int flags) | |
1da177e4 LT |
1212 | { |
1213 | xfs_trans_t *tp; | |
1214 | int error; | |
1215 | xfs_fileoff_t end_fsb; | |
1216 | xfs_fileoff_t last_fsb; | |
1217 | xfs_filblks_t map_len; | |
1218 | int nimaps; | |
1219 | xfs_bmbt_irec_t imap; | |
92dfe8d2 | 1220 | int use_iolock = (flags & XFS_FREE_EOF_LOCK); |
1da177e4 LT |
1221 | |
1222 | /* | |
1223 | * Figure out if there are any blocks beyond the end | |
1224 | * of the file. If not, then there is nothing to do. | |
1225 | */ | |
ba87ea69 | 1226 | end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_size)); |
1da177e4 LT |
1227 | last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
1228 | map_len = last_fsb - end_fsb; | |
1229 | if (map_len <= 0) | |
014c2544 | 1230 | return 0; |
1da177e4 LT |
1231 | |
1232 | nimaps = 1; | |
1233 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
3e57ecf6 OW |
1234 | error = XFS_BMAPI(mp, NULL, &ip->i_iocore, end_fsb, map_len, 0, |
1235 | NULL, 0, &imap, &nimaps, NULL, NULL); | |
1da177e4 LT |
1236 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
1237 | ||
1238 | if (!error && (nimaps != 0) && | |
68bdb6ea YL |
1239 | (imap.br_startblock != HOLESTARTBLOCK || |
1240 | ip->i_delayed_blks)) { | |
1da177e4 LT |
1241 | /* |
1242 | * Attach the dquots to the inode up front. | |
1243 | */ | |
1244 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) | |
014c2544 | 1245 | return error; |
1da177e4 LT |
1246 | |
1247 | /* | |
1248 | * There are blocks after the end of file. | |
1249 | * Free them up now by truncating the file to | |
1250 | * its current size. | |
1251 | */ | |
1252 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1253 | ||
1254 | /* | |
1255 | * Do the xfs_itruncate_start() call before | |
1256 | * reserving any log space because | |
1257 | * itruncate_start will call into the buffer | |
1258 | * cache and we can't | |
1259 | * do that within a transaction. | |
1260 | */ | |
92dfe8d2 DC |
1261 | if (use_iolock) |
1262 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
d3cf2094 | 1263 | error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, |
ba87ea69 | 1264 | ip->i_size); |
d3cf2094 | 1265 | if (error) { |
92dfe8d2 DC |
1266 | if (use_iolock) |
1267 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
d3cf2094 LM |
1268 | return error; |
1269 | } | |
1da177e4 LT |
1270 | |
1271 | error = xfs_trans_reserve(tp, 0, | |
1272 | XFS_ITRUNCATE_LOG_RES(mp), | |
1273 | 0, XFS_TRANS_PERM_LOG_RES, | |
1274 | XFS_ITRUNCATE_LOG_COUNT); | |
1275 | if (error) { | |
1276 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1277 | xfs_trans_cancel(tp, 0); | |
1278 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 1279 | return error; |
1da177e4 LT |
1280 | } |
1281 | ||
1282 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1283 | xfs_trans_ijoin(tp, ip, | |
1284 | XFS_IOLOCK_EXCL | | |
1285 | XFS_ILOCK_EXCL); | |
1286 | xfs_trans_ihold(tp, ip); | |
1287 | ||
1288 | error = xfs_itruncate_finish(&tp, ip, | |
ba87ea69 | 1289 | ip->i_size, |
1da177e4 LT |
1290 | XFS_DATA_FORK, |
1291 | 0); | |
1292 | /* | |
1293 | * If we get an error at this point we | |
1294 | * simply don't bother truncating the file. | |
1295 | */ | |
1296 | if (error) { | |
1297 | xfs_trans_cancel(tp, | |
1298 | (XFS_TRANS_RELEASE_LOG_RES | | |
1299 | XFS_TRANS_ABORT)); | |
1300 | } else { | |
1301 | error = xfs_trans_commit(tp, | |
1c72bf90 | 1302 | XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 | 1303 | } |
92dfe8d2 DC |
1304 | xfs_iunlock(ip, (use_iolock ? (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL) |
1305 | : XFS_ILOCK_EXCL)); | |
1da177e4 | 1306 | } |
014c2544 | 1307 | return error; |
1da177e4 LT |
1308 | } |
1309 | ||
1310 | /* | |
1311 | * Free a symlink that has blocks associated with it. | |
1312 | */ | |
1313 | STATIC int | |
1314 | xfs_inactive_symlink_rmt( | |
1315 | xfs_inode_t *ip, | |
1316 | xfs_trans_t **tpp) | |
1317 | { | |
1318 | xfs_buf_t *bp; | |
1319 | int committed; | |
1320 | int done; | |
1321 | int error; | |
1322 | xfs_fsblock_t first_block; | |
1323 | xfs_bmap_free_t free_list; | |
1324 | int i; | |
1325 | xfs_mount_t *mp; | |
1326 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
1327 | int nmaps; | |
1328 | xfs_trans_t *ntp; | |
1329 | int size; | |
1330 | xfs_trans_t *tp; | |
1331 | ||
1332 | tp = *tpp; | |
1333 | mp = ip->i_mount; | |
1334 | ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); | |
1335 | /* | |
1336 | * We're freeing a symlink that has some | |
1337 | * blocks allocated to it. Free the | |
1338 | * blocks here. We know that we've got | |
1339 | * either 1 or 2 extents and that we can | |
1340 | * free them all in one bunmapi call. | |
1341 | */ | |
1342 | ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); | |
1343 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
1344 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
1345 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1346 | xfs_trans_cancel(tp, 0); | |
1347 | *tpp = NULL; | |
1348 | return error; | |
1349 | } | |
1350 | /* | |
1351 | * Lock the inode, fix the size, and join it to the transaction. | |
1352 | * Hold it so in the normal path, we still have it locked for | |
1353 | * the second transaction. In the error paths we need it | |
1354 | * held so the cancel won't rele it, see below. | |
1355 | */ | |
1356 | xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1357 | size = (int)ip->i_d.di_size; | |
1358 | ip->i_d.di_size = 0; | |
1359 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
1360 | xfs_trans_ihold(tp, ip); | |
1361 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1362 | /* | |
1363 | * Find the block(s) so we can inval and unmap them. | |
1364 | */ | |
1365 | done = 0; | |
1366 | XFS_BMAP_INIT(&free_list, &first_block); | |
e8c96f8c | 1367 | nmaps = ARRAY_SIZE(mval); |
1da177e4 LT |
1368 | if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size), |
1369 | XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps, | |
3e57ecf6 | 1370 | &free_list, NULL))) |
1da177e4 LT |
1371 | goto error0; |
1372 | /* | |
1373 | * Invalidate the block(s). | |
1374 | */ | |
1375 | for (i = 0; i < nmaps; i++) { | |
1376 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
1377 | XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), | |
1378 | XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); | |
1379 | xfs_trans_binval(tp, bp); | |
1380 | } | |
1381 | /* | |
1382 | * Unmap the dead block(s) to the free_list. | |
1383 | */ | |
1384 | if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, | |
3e57ecf6 | 1385 | &first_block, &free_list, NULL, &done))) |
1da177e4 LT |
1386 | goto error1; |
1387 | ASSERT(done); | |
1388 | /* | |
1389 | * Commit the first transaction. This logs the EFI and the inode. | |
1390 | */ | |
f7c99b6f | 1391 | if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) |
1da177e4 LT |
1392 | goto error1; |
1393 | /* | |
1394 | * The transaction must have been committed, since there were | |
1395 | * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. | |
1396 | * The new tp has the extent freeing and EFDs. | |
1397 | */ | |
1398 | ASSERT(committed); | |
1399 | /* | |
1400 | * The first xact was committed, so add the inode to the new one. | |
1401 | * Mark it dirty so it will be logged and moved forward in the log as | |
1402 | * part of every commit. | |
1403 | */ | |
1404 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
1405 | xfs_trans_ihold(tp, ip); | |
1406 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1407 | /* | |
1408 | * Get a new, empty transaction to return to our caller. | |
1409 | */ | |
1410 | ntp = xfs_trans_dup(tp); | |
1411 | /* | |
c41564b5 | 1412 | * Commit the transaction containing extent freeing and EFDs. |
1da177e4 LT |
1413 | * If we get an error on the commit here or on the reserve below, |
1414 | * we need to unlock the inode since the new transaction doesn't | |
1415 | * have the inode attached. | |
1416 | */ | |
1c72bf90 | 1417 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
1418 | tp = ntp; |
1419 | if (error) { | |
1420 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1421 | goto error0; | |
1422 | } | |
1423 | /* | |
1424 | * Remove the memory for extent descriptions (just bookkeeping). | |
1425 | */ | |
1426 | if (ip->i_df.if_bytes) | |
1427 | xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); | |
1428 | ASSERT(ip->i_df.if_bytes == 0); | |
1429 | /* | |
1430 | * Put an itruncate log reservation in the new transaction | |
1431 | * for our caller. | |
1432 | */ | |
1433 | if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, | |
1434 | XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { | |
1435 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1436 | goto error0; | |
1437 | } | |
1438 | /* | |
1439 | * Return with the inode locked but not joined to the transaction. | |
1440 | */ | |
1441 | *tpp = tp; | |
1442 | return 0; | |
1443 | ||
1444 | error1: | |
1445 | xfs_bmap_cancel(&free_list); | |
1446 | error0: | |
1447 | /* | |
1448 | * Have to come here with the inode locked and either | |
1449 | * (held and in the transaction) or (not in the transaction). | |
1450 | * If the inode isn't held then cancel would iput it, but | |
1451 | * that's wrong since this is inactive and the vnode ref | |
1452 | * count is 0 already. | |
1453 | * Cancel won't do anything to the inode if held, but it still | |
1454 | * needs to be locked until the cancel is done, if it was | |
1455 | * joined to the transaction. | |
1456 | */ | |
1457 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
1458 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1459 | *tpp = NULL; | |
1460 | return error; | |
1461 | ||
1462 | } | |
1463 | ||
1464 | STATIC int | |
1465 | xfs_inactive_symlink_local( | |
1466 | xfs_inode_t *ip, | |
1467 | xfs_trans_t **tpp) | |
1468 | { | |
1469 | int error; | |
1470 | ||
1471 | ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); | |
1472 | /* | |
1473 | * We're freeing a symlink which fit into | |
1474 | * the inode. Just free the memory used | |
1475 | * to hold the old symlink. | |
1476 | */ | |
1477 | error = xfs_trans_reserve(*tpp, 0, | |
1478 | XFS_ITRUNCATE_LOG_RES(ip->i_mount), | |
1479 | 0, XFS_TRANS_PERM_LOG_RES, | |
1480 | XFS_ITRUNCATE_LOG_COUNT); | |
1481 | ||
1482 | if (error) { | |
1483 | xfs_trans_cancel(*tpp, 0); | |
1484 | *tpp = NULL; | |
014c2544 | 1485 | return error; |
1da177e4 LT |
1486 | } |
1487 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
1488 | ||
1489 | /* | |
1490 | * Zero length symlinks _can_ exist. | |
1491 | */ | |
1492 | if (ip->i_df.if_bytes > 0) { | |
1493 | xfs_idata_realloc(ip, | |
1494 | -(ip->i_df.if_bytes), | |
1495 | XFS_DATA_FORK); | |
1496 | ASSERT(ip->i_df.if_bytes == 0); | |
1497 | } | |
014c2544 | 1498 | return 0; |
1da177e4 LT |
1499 | } |
1500 | ||
1da177e4 LT |
1501 | STATIC int |
1502 | xfs_inactive_attrs( | |
1503 | xfs_inode_t *ip, | |
1504 | xfs_trans_t **tpp) | |
1505 | { | |
1506 | xfs_trans_t *tp; | |
1507 | int error; | |
1508 | xfs_mount_t *mp; | |
1509 | ||
1510 | ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE)); | |
1511 | tp = *tpp; | |
1512 | mp = ip->i_mount; | |
1513 | ASSERT(ip->i_d.di_forkoff != 0); | |
1c72bf90 | 1514 | xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1515 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1516 | ||
1517 | error = xfs_attr_inactive(ip); | |
1518 | if (error) { | |
1519 | *tpp = NULL; | |
1520 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 1521 | return error; /* goto out */ |
1da177e4 LT |
1522 | } |
1523 | ||
1524 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1525 | error = xfs_trans_reserve(tp, 0, | |
1526 | XFS_IFREE_LOG_RES(mp), | |
1527 | 0, XFS_TRANS_PERM_LOG_RES, | |
1528 | XFS_INACTIVE_LOG_COUNT); | |
1529 | if (error) { | |
1530 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1531 | xfs_trans_cancel(tp, 0); | |
1532 | *tpp = NULL; | |
1533 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 1534 | return error; |
1da177e4 LT |
1535 | } |
1536 | ||
1537 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1538 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1539 | xfs_trans_ihold(tp, ip); | |
1540 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
1541 | ||
1542 | ASSERT(ip->i_d.di_anextents == 0); | |
1543 | ||
1544 | *tpp = tp; | |
014c2544 | 1545 | return 0; |
1da177e4 LT |
1546 | } |
1547 | ||
1548 | STATIC int | |
1549 | xfs_release( | |
1550 | bhv_desc_t *bdp) | |
1551 | { | |
1552 | xfs_inode_t *ip; | |
67fcaa73 | 1553 | bhv_vnode_t *vp; |
1da177e4 LT |
1554 | xfs_mount_t *mp; |
1555 | int error; | |
1556 | ||
1557 | vp = BHV_TO_VNODE(bdp); | |
1558 | ip = XFS_BHVTOI(bdp); | |
7d4fb40a | 1559 | mp = ip->i_mount; |
1da177e4 | 1560 | |
7d4fb40a | 1561 | if (!VN_ISREG(vp) || (ip->i_d.di_mode == 0)) |
1da177e4 | 1562 | return 0; |
1da177e4 LT |
1563 | |
1564 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
1565 | if (vp->v_vfsp->vfs_flag & VFS_RDONLY) | |
1566 | return 0; | |
1567 | ||
1568 | #ifdef HAVE_REFCACHE | |
1569 | /* If we are in the NFS reference cache then don't do this now */ | |
1570 | if (ip->i_refcache) | |
1571 | return 0; | |
1572 | #endif | |
1573 | ||
1da177e4 LT |
1574 | if (ip->i_d.di_nlink != 0) { |
1575 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
ba87ea69 | 1576 | ((ip->i_size > 0) || (VN_CACHED(vp) > 0 || |
68bdb6ea | 1577 | ip->i_delayed_blks > 0)) && |
1da177e4 | 1578 | (ip->i_df.if_flags & XFS_IFEXTENTS)) && |
dd9f438e NS |
1579 | (!(ip->i_d.di_flags & |
1580 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { | |
92dfe8d2 DC |
1581 | error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_LOCK); |
1582 | if (error) | |
014c2544 | 1583 | return error; |
1da177e4 | 1584 | /* Update linux inode block count after free above */ |
ec86dc02 | 1585 | vn_to_inode(vp)->i_blocks = XFS_FSB_TO_BB(mp, |
1da177e4 LT |
1586 | ip->i_d.di_nblocks + ip->i_delayed_blks); |
1587 | } | |
1588 | } | |
1589 | ||
1590 | return 0; | |
1591 | } | |
1592 | ||
1593 | /* | |
1594 | * xfs_inactive | |
1595 | * | |
1596 | * This is called when the vnode reference count for the vnode | |
1597 | * goes to zero. If the file has been unlinked, then it must | |
1598 | * now be truncated. Also, we clear all of the read-ahead state | |
1599 | * kept for the inode here since the file is now closed. | |
1600 | */ | |
1601 | STATIC int | |
1602 | xfs_inactive( | |
1603 | bhv_desc_t *bdp, | |
1604 | cred_t *credp) | |
1605 | { | |
1606 | xfs_inode_t *ip; | |
67fcaa73 NS |
1607 | bhv_vnode_t *vp; |
1608 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
1609 | xfs_fsblock_t first_block; |
1610 | int committed; | |
1611 | xfs_trans_t *tp; | |
1612 | xfs_mount_t *mp; | |
1613 | int error; | |
1614 | int truncate; | |
1615 | ||
1616 | vp = BHV_TO_VNODE(bdp); | |
1617 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); | |
1618 | ||
1619 | ip = XFS_BHVTOI(bdp); | |
1620 | ||
1621 | /* | |
1622 | * If the inode is already free, then there can be nothing | |
1623 | * to clean up here. | |
1624 | */ | |
1625 | if (ip->i_d.di_mode == 0 || VN_BAD(vp)) { | |
1626 | ASSERT(ip->i_df.if_real_bytes == 0); | |
1627 | ASSERT(ip->i_df.if_broot_bytes == 0); | |
1628 | return VN_INACTIVE_CACHE; | |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | * Only do a truncate if it's a regular file with | |
1633 | * some actual space in it. It's OK to look at the | |
1634 | * inode's fields without the lock because we're the | |
1635 | * only one with a reference to the inode. | |
1636 | */ | |
1637 | truncate = ((ip->i_d.di_nlink == 0) && | |
ba87ea69 LM |
1638 | ((ip->i_d.di_size != 0) || (ip->i_size != 0) || |
1639 | (ip->i_d.di_nextents > 0) || (ip->i_delayed_blks > 0)) && | |
1da177e4 LT |
1640 | ((ip->i_d.di_mode & S_IFMT) == S_IFREG)); |
1641 | ||
1642 | mp = ip->i_mount; | |
1643 | ||
1644 | if (ip->i_d.di_nlink == 0 && | |
1645 | DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_DESTROY)) { | |
1646 | (void) XFS_SEND_DESTROY(mp, vp, DM_RIGHT_NULL); | |
1647 | } | |
1648 | ||
1649 | error = 0; | |
1650 | ||
1651 | /* If this is a read-only mount, don't do this (would generate I/O) */ | |
1652 | if (vp->v_vfsp->vfs_flag & VFS_RDONLY) | |
1653 | goto out; | |
1654 | ||
1655 | if (ip->i_d.di_nlink != 0) { | |
1656 | if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && | |
ba87ea69 | 1657 | ((ip->i_size > 0) || (VN_CACHED(vp) > 0 || |
68bdb6ea | 1658 | ip->i_delayed_blks > 0)) && |
dd9f438e NS |
1659 | (ip->i_df.if_flags & XFS_IFEXTENTS) && |
1660 | (!(ip->i_d.di_flags & | |
1661 | (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || | |
1662 | (ip->i_delayed_blks != 0)))) { | |
92dfe8d2 DC |
1663 | error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_LOCK); |
1664 | if (error) | |
014c2544 | 1665 | return VN_INACTIVE_CACHE; |
1da177e4 | 1666 | /* Update linux inode block count after free above */ |
ec86dc02 | 1667 | vn_to_inode(vp)->i_blocks = XFS_FSB_TO_BB(mp, |
1da177e4 LT |
1668 | ip->i_d.di_nblocks + ip->i_delayed_blks); |
1669 | } | |
1670 | goto out; | |
1671 | } | |
1672 | ||
1673 | ASSERT(ip->i_d.di_nlink == 0); | |
1674 | ||
1675 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) | |
014c2544 | 1676 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1677 | |
1678 | tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); | |
1679 | if (truncate) { | |
1680 | /* | |
1681 | * Do the xfs_itruncate_start() call before | |
1682 | * reserving any log space because itruncate_start | |
1683 | * will call into the buffer cache and we can't | |
1684 | * do that within a transaction. | |
1685 | */ | |
1686 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
1687 | ||
d3cf2094 LM |
1688 | error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0); |
1689 | if (error) { | |
1690 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
1691 | return VN_INACTIVE_CACHE; | |
1692 | } | |
1da177e4 LT |
1693 | |
1694 | error = xfs_trans_reserve(tp, 0, | |
1695 | XFS_ITRUNCATE_LOG_RES(mp), | |
1696 | 0, XFS_TRANS_PERM_LOG_RES, | |
1697 | XFS_ITRUNCATE_LOG_COUNT); | |
1698 | if (error) { | |
1699 | /* Don't call itruncate_cleanup */ | |
1700 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1701 | xfs_trans_cancel(tp, 0); | |
1702 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
014c2544 | 1703 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1704 | } |
1705 | ||
1706 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1707 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1708 | xfs_trans_ihold(tp, ip); | |
1709 | ||
1710 | /* | |
1711 | * normally, we have to run xfs_itruncate_finish sync. | |
1712 | * But if filesystem is wsync and we're in the inactive | |
1713 | * path, then we know that nlink == 0, and that the | |
1714 | * xaction that made nlink == 0 is permanently committed | |
1715 | * since xfs_remove runs as a synchronous transaction. | |
1716 | */ | |
1717 | error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK, | |
1718 | (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0)); | |
1719 | ||
1720 | if (error) { | |
1721 | xfs_trans_cancel(tp, | |
1722 | XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
1723 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
014c2544 | 1724 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1725 | } |
1726 | } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) { | |
1727 | ||
1728 | /* | |
1729 | * If we get an error while cleaning up a | |
1730 | * symlink we bail out. | |
1731 | */ | |
1732 | error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? | |
1733 | xfs_inactive_symlink_rmt(ip, &tp) : | |
1734 | xfs_inactive_symlink_local(ip, &tp); | |
1735 | ||
1736 | if (error) { | |
1737 | ASSERT(tp == NULL); | |
014c2544 | 1738 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1739 | } |
1740 | ||
1741 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1742 | xfs_trans_ihold(tp, ip); | |
1743 | } else { | |
1744 | error = xfs_trans_reserve(tp, 0, | |
1745 | XFS_IFREE_LOG_RES(mp), | |
1746 | 0, XFS_TRANS_PERM_LOG_RES, | |
1747 | XFS_INACTIVE_LOG_COUNT); | |
1748 | if (error) { | |
1749 | ASSERT(XFS_FORCED_SHUTDOWN(mp)); | |
1750 | xfs_trans_cancel(tp, 0); | |
014c2544 | 1751 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1752 | } |
1753 | ||
1754 | xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
1755 | xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1756 | xfs_trans_ihold(tp, ip); | |
1757 | } | |
1758 | ||
1759 | /* | |
1760 | * If there are attributes associated with the file | |
1761 | * then blow them away now. The code calls a routine | |
1762 | * that recursively deconstructs the attribute fork. | |
1763 | * We need to just commit the current transaction | |
1764 | * because we can't use it for xfs_attr_inactive(). | |
1765 | */ | |
1766 | if (ip->i_d.di_anextents > 0) { | |
1767 | error = xfs_inactive_attrs(ip, &tp); | |
1768 | /* | |
1769 | * If we got an error, the transaction is already | |
1770 | * cancelled, and the inode is unlocked. Just get out. | |
1771 | */ | |
1772 | if (error) | |
014c2544 | 1773 | return VN_INACTIVE_CACHE; |
1da177e4 LT |
1774 | } else if (ip->i_afp) { |
1775 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); | |
1776 | } | |
1777 | ||
1778 | /* | |
1779 | * Free the inode. | |
1780 | */ | |
1781 | XFS_BMAP_INIT(&free_list, &first_block); | |
1782 | error = xfs_ifree(tp, ip, &free_list); | |
1783 | if (error) { | |
1784 | /* | |
1785 | * If we fail to free the inode, shut down. The cancel | |
1786 | * might do that, we need to make sure. Otherwise the | |
1787 | * inode might be lost for a long time or forever. | |
1788 | */ | |
1789 | if (!XFS_FORCED_SHUTDOWN(mp)) { | |
1790 | cmn_err(CE_NOTE, | |
1791 | "xfs_inactive: xfs_ifree() returned an error = %d on %s", | |
1792 | error, mp->m_fsname); | |
7d04a335 | 1793 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
1794 | } |
1795 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
1796 | } else { | |
1797 | /* | |
1798 | * Credit the quota account(s). The inode is gone. | |
1799 | */ | |
1800 | XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_ICOUNT, -1); | |
1801 | ||
1802 | /* | |
1803 | * Just ignore errors at this point. There is | |
1804 | * nothing we can do except to try to keep going. | |
1805 | */ | |
f7c99b6f | 1806 | (void) xfs_bmap_finish(&tp, &free_list, &committed); |
1c72bf90 | 1807 | (void) xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
1808 | } |
1809 | /* | |
1810 | * Release the dquots held by inode, if any. | |
1811 | */ | |
1812 | XFS_QM_DQDETACH(mp, ip); | |
1813 | ||
1814 | xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); | |
1815 | ||
1816 | out: | |
1817 | return VN_INACTIVE_CACHE; | |
1818 | } | |
1819 | ||
1820 | ||
1821 | /* | |
1822 | * xfs_lookup | |
1823 | */ | |
1824 | STATIC int | |
1825 | xfs_lookup( | |
1826 | bhv_desc_t *dir_bdp, | |
8285fb58 | 1827 | bhv_vname_t *dentry, |
67fcaa73 | 1828 | bhv_vnode_t **vpp, |
1da177e4 | 1829 | int flags, |
67fcaa73 | 1830 | bhv_vnode_t *rdir, |
1da177e4 LT |
1831 | cred_t *credp) |
1832 | { | |
1833 | xfs_inode_t *dp, *ip; | |
1834 | xfs_ino_t e_inum; | |
1835 | int error; | |
1836 | uint lock_mode; | |
67fcaa73 | 1837 | bhv_vnode_t *dir_vp; |
1da177e4 LT |
1838 | |
1839 | dir_vp = BHV_TO_VNODE(dir_bdp); | |
1840 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); | |
1841 | ||
1842 | dp = XFS_BHVTOI(dir_bdp); | |
1843 | ||
1844 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) | |
1845 | return XFS_ERROR(EIO); | |
1846 | ||
1847 | lock_mode = xfs_ilock_map_shared(dp); | |
1848 | error = xfs_dir_lookup_int(dir_bdp, lock_mode, dentry, &e_inum, &ip); | |
1849 | if (!error) { | |
1850 | *vpp = XFS_ITOV(ip); | |
1851 | ITRACE(ip); | |
1852 | } | |
1853 | xfs_iunlock_map_shared(dp, lock_mode); | |
1854 | return error; | |
1855 | } | |
1856 | ||
1857 | ||
1858 | /* | |
1859 | * xfs_create (create a new file). | |
1860 | */ | |
1861 | STATIC int | |
1862 | xfs_create( | |
1863 | bhv_desc_t *dir_bdp, | |
8285fb58 NS |
1864 | bhv_vname_t *dentry, |
1865 | bhv_vattr_t *vap, | |
67fcaa73 | 1866 | bhv_vnode_t **vpp, |
1da177e4 LT |
1867 | cred_t *credp) |
1868 | { | |
1869 | char *name = VNAME(dentry); | |
67fcaa73 | 1870 | bhv_vnode_t *dir_vp; |
1da177e4 | 1871 | xfs_inode_t *dp, *ip; |
67fcaa73 | 1872 | bhv_vnode_t *vp = NULL; |
1da177e4 LT |
1873 | xfs_trans_t *tp; |
1874 | xfs_mount_t *mp; | |
1875 | xfs_dev_t rdev; | |
1876 | int error; | |
1877 | xfs_bmap_free_t free_list; | |
1878 | xfs_fsblock_t first_block; | |
1879 | boolean_t dp_joined_to_trans; | |
1880 | int dm_event_sent = 0; | |
1881 | uint cancel_flags; | |
1882 | int committed; | |
1883 | xfs_prid_t prid; | |
1884 | struct xfs_dquot *udqp, *gdqp; | |
1885 | uint resblks; | |
1886 | int dm_di_mode; | |
1887 | int namelen; | |
1888 | ||
1889 | ASSERT(!*vpp); | |
1890 | dir_vp = BHV_TO_VNODE(dir_bdp); | |
1891 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); | |
1892 | ||
1893 | dp = XFS_BHVTOI(dir_bdp); | |
1894 | mp = dp->i_mount; | |
1895 | ||
0432dab2 | 1896 | dm_di_mode = vap->va_mode; |
1da177e4 LT |
1897 | namelen = VNAMELEN(dentry); |
1898 | ||
1899 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) { | |
1900 | error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, | |
1901 | dir_vp, DM_RIGHT_NULL, NULL, | |
1902 | DM_RIGHT_NULL, name, NULL, | |
1903 | dm_di_mode, 0, 0); | |
1904 | ||
1905 | if (error) | |
1906 | return error; | |
1907 | dm_event_sent = 1; | |
1908 | } | |
1909 | ||
1910 | if (XFS_FORCED_SHUTDOWN(mp)) | |
1911 | return XFS_ERROR(EIO); | |
1912 | ||
1913 | /* Return through std_return after this point. */ | |
1914 | ||
1915 | udqp = gdqp = NULL; | |
365ca83d NS |
1916 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
1917 | prid = dp->i_d.di_projid; | |
1918 | else if (vap->va_mask & XFS_AT_PROJID) | |
1da177e4 LT |
1919 | prid = (xfs_prid_t)vap->va_projid; |
1920 | else | |
1921 | prid = (xfs_prid_t)dfltprid; | |
1922 | ||
1923 | /* | |
1924 | * Make sure that we have allocated dquot(s) on disk. | |
1925 | */ | |
1926 | error = XFS_QM_DQVOPALLOC(mp, dp, | |
c8ad20ff | 1927 | current_fsuid(credp), current_fsgid(credp), prid, |
1da177e4 LT |
1928 | XFS_QMOPT_QUOTALL|XFS_QMOPT_INHERIT, &udqp, &gdqp); |
1929 | if (error) | |
1930 | goto std_return; | |
1931 | ||
1932 | ip = NULL; | |
1933 | dp_joined_to_trans = B_FALSE; | |
1934 | ||
1935 | tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); | |
1936 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
1937 | resblks = XFS_CREATE_SPACE_RES(mp, namelen); | |
1938 | /* | |
1939 | * Initially assume that the file does not exist and | |
1940 | * reserve the resources for that case. If that is not | |
1941 | * the case we'll drop the one we have and get a more | |
1942 | * appropriate transaction later. | |
1943 | */ | |
1944 | error = xfs_trans_reserve(tp, resblks, XFS_CREATE_LOG_RES(mp), 0, | |
1945 | XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT); | |
1946 | if (error == ENOSPC) { | |
1947 | resblks = 0; | |
1948 | error = xfs_trans_reserve(tp, 0, XFS_CREATE_LOG_RES(mp), 0, | |
1949 | XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT); | |
1950 | } | |
1951 | if (error) { | |
1952 | cancel_flags = 0; | |
1953 | dp = NULL; | |
1954 | goto error_return; | |
1955 | } | |
1956 | ||
f7c66ce3 | 1957 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
1da177e4 LT |
1958 | |
1959 | XFS_BMAP_INIT(&free_list, &first_block); | |
1960 | ||
1961 | ASSERT(ip == NULL); | |
1962 | ||
1963 | /* | |
1964 | * Reserve disk quota and the inode. | |
1965 | */ | |
1966 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); | |
1967 | if (error) | |
1968 | goto error_return; | |
1969 | ||
f6c2d1fa | 1970 | if (resblks == 0 && (error = xfs_dir_canenter(tp, dp, name, namelen))) |
1da177e4 LT |
1971 | goto error_return; |
1972 | rdev = (vap->va_mask & XFS_AT_RDEV) ? vap->va_rdev : 0; | |
0432dab2 | 1973 | error = xfs_dir_ialloc(&tp, dp, vap->va_mode, 1, |
1da177e4 LT |
1974 | rdev, credp, prid, resblks > 0, |
1975 | &ip, &committed); | |
1976 | if (error) { | |
1977 | if (error == ENOSPC) | |
1978 | goto error_return; | |
1979 | goto abort_return; | |
1980 | } | |
1981 | ITRACE(ip); | |
1982 | ||
1983 | /* | |
1984 | * At this point, we've gotten a newly allocated inode. | |
1985 | * It is locked (and joined to the transaction). | |
1986 | */ | |
1987 | ||
1988 | ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE)); | |
1989 | ||
1990 | /* | |
1991 | * Now we join the directory inode to the transaction. | |
1992 | * We do not do it earlier because xfs_dir_ialloc | |
1993 | * might commit the previous transaction (and release | |
1994 | * all the locks). | |
1995 | */ | |
1996 | ||
1997 | VN_HOLD(dir_vp); | |
1998 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); | |
1999 | dp_joined_to_trans = B_TRUE; | |
2000 | ||
f6c2d1fa NS |
2001 | error = xfs_dir_createname(tp, dp, name, namelen, ip->i_ino, |
2002 | &first_block, &free_list, resblks ? | |
2003 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
2004 | if (error) { |
2005 | ASSERT(error != ENOSPC); | |
2006 | goto abort_return; | |
2007 | } | |
2008 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2009 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
2010 | ||
2011 | /* | |
2012 | * If this is a synchronous mount, make sure that the | |
2013 | * create transaction goes to disk before returning to | |
2014 | * the user. | |
2015 | */ | |
2016 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2017 | xfs_trans_set_sync(tp); | |
2018 | } | |
2019 | ||
2020 | dp->i_gen++; | |
2021 | ||
2022 | /* | |
2023 | * Attach the dquot(s) to the inodes and modify them incore. | |
2024 | * These ids of the inode couldn't have changed since the new | |
2025 | * inode has been locked ever since it was created. | |
2026 | */ | |
2027 | XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp); | |
2028 | ||
2029 | /* | |
2030 | * xfs_trans_commit normally decrements the vnode ref count | |
2031 | * when it unlocks the inode. Since we want to return the | |
2032 | * vnode to the caller, we bump the vnode ref count now. | |
2033 | */ | |
2034 | IHOLD(ip); | |
2035 | vp = XFS_ITOV(ip); | |
2036 | ||
f7c99b6f | 2037 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2038 | if (error) { |
2039 | xfs_bmap_cancel(&free_list); | |
2040 | goto abort_rele; | |
2041 | } | |
2042 | ||
1c72bf90 | 2043 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2044 | if (error) { |
2045 | IRELE(ip); | |
2046 | tp = NULL; | |
2047 | goto error_return; | |
2048 | } | |
2049 | ||
2050 | XFS_QM_DQRELE(mp, udqp); | |
2051 | XFS_QM_DQRELE(mp, gdqp); | |
2052 | ||
2053 | /* | |
c41564b5 | 2054 | * Propagate the fact that the vnode changed after the |
1da177e4 LT |
2055 | * xfs_inode locks have been released. |
2056 | */ | |
67fcaa73 | 2057 | bhv_vop_vnode_change(vp, VCHANGE_FLAGS_TRUNCATED, 3); |
1da177e4 LT |
2058 | |
2059 | *vpp = vp; | |
2060 | ||
2061 | /* Fallthrough to std_return with error = 0 */ | |
2062 | ||
2063 | std_return: | |
2064 | if ( (*vpp || (error != 0 && dm_event_sent != 0)) && | |
2065 | DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp), | |
2066 | DM_EVENT_POSTCREATE)) { | |
2067 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, | |
2068 | dir_vp, DM_RIGHT_NULL, | |
2069 | *vpp ? vp:NULL, | |
2070 | DM_RIGHT_NULL, name, NULL, | |
2071 | dm_di_mode, error, 0); | |
2072 | } | |
2073 | return error; | |
2074 | ||
2075 | abort_return: | |
2076 | cancel_flags |= XFS_TRANS_ABORT; | |
2077 | /* FALLTHROUGH */ | |
1da177e4 | 2078 | |
014c2544 | 2079 | error_return: |
1da177e4 LT |
2080 | if (tp != NULL) |
2081 | xfs_trans_cancel(tp, cancel_flags); | |
2082 | ||
2083 | if (!dp_joined_to_trans && (dp != NULL)) | |
2084 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
2085 | XFS_QM_DQRELE(mp, udqp); | |
2086 | XFS_QM_DQRELE(mp, gdqp); | |
2087 | ||
2088 | goto std_return; | |
2089 | ||
2090 | abort_rele: | |
2091 | /* | |
2092 | * Wait until after the current transaction is aborted to | |
2093 | * release the inode. This prevents recursive transactions | |
2094 | * and deadlocks from xfs_inactive. | |
2095 | */ | |
2096 | cancel_flags |= XFS_TRANS_ABORT; | |
2097 | xfs_trans_cancel(tp, cancel_flags); | |
2098 | IRELE(ip); | |
2099 | ||
2100 | XFS_QM_DQRELE(mp, udqp); | |
2101 | XFS_QM_DQRELE(mp, gdqp); | |
2102 | ||
2103 | goto std_return; | |
2104 | } | |
2105 | ||
2106 | #ifdef DEBUG | |
2107 | /* | |
2108 | * Some counters to see if (and how often) we are hitting some deadlock | |
2109 | * prevention code paths. | |
2110 | */ | |
2111 | ||
2112 | int xfs_rm_locks; | |
2113 | int xfs_rm_lock_delays; | |
2114 | int xfs_rm_attempts; | |
2115 | #endif | |
2116 | ||
2117 | /* | |
2118 | * The following routine will lock the inodes associated with the | |
2119 | * directory and the named entry in the directory. The locks are | |
2120 | * acquired in increasing inode number. | |
2121 | * | |
2122 | * If the entry is "..", then only the directory is locked. The | |
2123 | * vnode ref count will still include that from the .. entry in | |
2124 | * this case. | |
2125 | * | |
2126 | * There is a deadlock we need to worry about. If the locked directory is | |
2127 | * in the AIL, it might be blocking up the log. The next inode we lock | |
2128 | * could be already locked by another thread waiting for log space (e.g | |
2129 | * a permanent log reservation with a long running transaction (see | |
2130 | * xfs_itruncate_finish)). To solve this, we must check if the directory | |
2131 | * is in the ail and use lock_nowait. If we can't lock, we need to | |
2132 | * drop the inode lock on the directory and try again. xfs_iunlock will | |
2133 | * potentially push the tail if we were holding up the log. | |
2134 | */ | |
2135 | STATIC int | |
2136 | xfs_lock_dir_and_entry( | |
2137 | xfs_inode_t *dp, | |
1da177e4 LT |
2138 | xfs_inode_t *ip) /* inode of entry 'name' */ |
2139 | { | |
2140 | int attempts; | |
2141 | xfs_ino_t e_inum; | |
2142 | xfs_inode_t *ips[2]; | |
2143 | xfs_log_item_t *lp; | |
2144 | ||
2145 | #ifdef DEBUG | |
2146 | xfs_rm_locks++; | |
2147 | #endif | |
2148 | attempts = 0; | |
2149 | ||
2150 | again: | |
f7c66ce3 | 2151 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
1da177e4 LT |
2152 | |
2153 | e_inum = ip->i_ino; | |
2154 | ||
2155 | ITRACE(ip); | |
2156 | ||
2157 | /* | |
2158 | * We want to lock in increasing inum. Since we've already | |
2159 | * acquired the lock on the directory, we may need to release | |
2160 | * if if the inum of the entry turns out to be less. | |
2161 | */ | |
2162 | if (e_inum > dp->i_ino) { | |
2163 | /* | |
2164 | * We are already in the right order, so just | |
2165 | * lock on the inode of the entry. | |
2166 | * We need to use nowait if dp is in the AIL. | |
2167 | */ | |
2168 | ||
2169 | lp = (xfs_log_item_t *)dp->i_itemp; | |
2170 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
2171 | if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { | |
2172 | attempts++; | |
2173 | #ifdef DEBUG | |
2174 | xfs_rm_attempts++; | |
2175 | #endif | |
2176 | ||
2177 | /* | |
2178 | * Unlock dp and try again. | |
2179 | * xfs_iunlock will try to push the tail | |
2180 | * if the inode is in the AIL. | |
2181 | */ | |
2182 | ||
2183 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
2184 | ||
2185 | if ((attempts % 5) == 0) { | |
2186 | delay(1); /* Don't just spin the CPU */ | |
2187 | #ifdef DEBUG | |
2188 | xfs_rm_lock_delays++; | |
2189 | #endif | |
2190 | } | |
2191 | goto again; | |
2192 | } | |
2193 | } else { | |
2194 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2195 | } | |
2196 | } else if (e_inum < dp->i_ino) { | |
2197 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
2198 | ||
2199 | ips[0] = ip; | |
2200 | ips[1] = dp; | |
2201 | xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL); | |
2202 | } | |
2203 | /* else e_inum == dp->i_ino */ | |
2204 | /* This can happen if we're asked to lock /x/.. | |
2205 | * the entry is "..", which is also the parent directory. | |
2206 | */ | |
2207 | ||
2208 | return 0; | |
2209 | } | |
2210 | ||
2211 | #ifdef DEBUG | |
2212 | int xfs_locked_n; | |
2213 | int xfs_small_retries; | |
2214 | int xfs_middle_retries; | |
2215 | int xfs_lots_retries; | |
2216 | int xfs_lock_delays; | |
2217 | #endif | |
2218 | ||
f7c66ce3 LM |
2219 | /* |
2220 | * Bump the subclass so xfs_lock_inodes() acquires each lock with | |
2221 | * a different value | |
2222 | */ | |
2223 | static inline int | |
2224 | xfs_lock_inumorder(int lock_mode, int subclass) | |
2225 | { | |
2226 | if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) | |
2227 | lock_mode |= (subclass + XFS_IOLOCK_INUMORDER) << XFS_IOLOCK_SHIFT; | |
2228 | if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) | |
2229 | lock_mode |= (subclass + XFS_ILOCK_INUMORDER) << XFS_ILOCK_SHIFT; | |
2230 | ||
2231 | return lock_mode; | |
2232 | } | |
2233 | ||
1da177e4 LT |
2234 | /* |
2235 | * The following routine will lock n inodes in exclusive mode. | |
2236 | * We assume the caller calls us with the inodes in i_ino order. | |
2237 | * | |
2238 | * We need to detect deadlock where an inode that we lock | |
2239 | * is in the AIL and we start waiting for another inode that is locked | |
2240 | * by a thread in a long running transaction (such as truncate). This can | |
2241 | * result in deadlock since the long running trans might need to wait | |
2242 | * for the inode we just locked in order to push the tail and free space | |
2243 | * in the log. | |
2244 | */ | |
2245 | void | |
2246 | xfs_lock_inodes( | |
2247 | xfs_inode_t **ips, | |
2248 | int inodes, | |
2249 | int first_locked, | |
2250 | uint lock_mode) | |
2251 | { | |
2252 | int attempts = 0, i, j, try_lock; | |
2253 | xfs_log_item_t *lp; | |
2254 | ||
2255 | ASSERT(ips && (inodes >= 2)); /* we need at least two */ | |
2256 | ||
2257 | if (first_locked) { | |
2258 | try_lock = 1; | |
2259 | i = 1; | |
2260 | } else { | |
2261 | try_lock = 0; | |
2262 | i = 0; | |
2263 | } | |
2264 | ||
2265 | again: | |
2266 | for (; i < inodes; i++) { | |
2267 | ASSERT(ips[i]); | |
2268 | ||
2269 | if (i && (ips[i] == ips[i-1])) /* Already locked */ | |
2270 | continue; | |
2271 | ||
2272 | /* | |
2273 | * If try_lock is not set yet, make sure all locked inodes | |
2274 | * are not in the AIL. | |
2275 | * If any are, set try_lock to be used later. | |
2276 | */ | |
2277 | ||
2278 | if (!try_lock) { | |
2279 | for (j = (i - 1); j >= 0 && !try_lock; j--) { | |
2280 | lp = (xfs_log_item_t *)ips[j]->i_itemp; | |
2281 | if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { | |
2282 | try_lock++; | |
2283 | } | |
2284 | } | |
2285 | } | |
2286 | ||
2287 | /* | |
2288 | * If any of the previous locks we have locked is in the AIL, | |
2289 | * we must TRY to get the second and subsequent locks. If | |
2290 | * we can't get any, we must release all we have | |
2291 | * and try again. | |
2292 | */ | |
2293 | ||
2294 | if (try_lock) { | |
2295 | /* try_lock must be 0 if i is 0. */ | |
2296 | /* | |
2297 | * try_lock means we have an inode locked | |
2298 | * that is in the AIL. | |
2299 | */ | |
2300 | ASSERT(i != 0); | |
f7c66ce3 | 2301 | if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { |
1da177e4 LT |
2302 | attempts++; |
2303 | ||
2304 | /* | |
2305 | * Unlock all previous guys and try again. | |
2306 | * xfs_iunlock will try to push the tail | |
2307 | * if the inode is in the AIL. | |
2308 | */ | |
2309 | ||
2310 | for(j = i - 1; j >= 0; j--) { | |
2311 | ||
2312 | /* | |
2313 | * Check to see if we've already | |
2314 | * unlocked this one. | |
2315 | * Not the first one going back, | |
2316 | * and the inode ptr is the same. | |
2317 | */ | |
2318 | if ((j != (i - 1)) && ips[j] == | |
2319 | ips[j+1]) | |
2320 | continue; | |
2321 | ||
2322 | xfs_iunlock(ips[j], lock_mode); | |
2323 | } | |
2324 | ||
2325 | if ((attempts % 5) == 0) { | |
2326 | delay(1); /* Don't just spin the CPU */ | |
2327 | #ifdef DEBUG | |
2328 | xfs_lock_delays++; | |
2329 | #endif | |
2330 | } | |
2331 | i = 0; | |
2332 | try_lock = 0; | |
2333 | goto again; | |
2334 | } | |
2335 | } else { | |
f7c66ce3 | 2336 | xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); |
1da177e4 LT |
2337 | } |
2338 | } | |
2339 | ||
2340 | #ifdef DEBUG | |
2341 | if (attempts) { | |
2342 | if (attempts < 5) xfs_small_retries++; | |
2343 | else if (attempts < 100) xfs_middle_retries++; | |
2344 | else xfs_lots_retries++; | |
2345 | } else { | |
2346 | xfs_locked_n++; | |
2347 | } | |
2348 | #endif | |
2349 | } | |
2350 | ||
2351 | #ifdef DEBUG | |
2352 | #define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);} | |
2353 | int remove_which_error_return = 0; | |
2354 | #else /* ! DEBUG */ | |
2355 | #define REMOVE_DEBUG_TRACE(x) | |
2356 | #endif /* ! DEBUG */ | |
2357 | ||
2358 | ||
2359 | /* | |
2360 | * xfs_remove | |
2361 | * | |
2362 | */ | |
2363 | STATIC int | |
2364 | xfs_remove( | |
2365 | bhv_desc_t *dir_bdp, | |
8285fb58 | 2366 | bhv_vname_t *dentry, |
1da177e4 LT |
2367 | cred_t *credp) |
2368 | { | |
67fcaa73 | 2369 | bhv_vnode_t *dir_vp; |
1da177e4 LT |
2370 | char *name = VNAME(dentry); |
2371 | xfs_inode_t *dp, *ip; | |
2372 | xfs_trans_t *tp = NULL; | |
2373 | xfs_mount_t *mp; | |
2374 | int error = 0; | |
2375 | xfs_bmap_free_t free_list; | |
2376 | xfs_fsblock_t first_block; | |
2377 | int cancel_flags; | |
2378 | int committed; | |
2379 | int dm_di_mode = 0; | |
2380 | int link_zero; | |
2381 | uint resblks; | |
2382 | int namelen; | |
2383 | ||
2384 | dir_vp = BHV_TO_VNODE(dir_bdp); | |
2385 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); | |
2386 | ||
2387 | dp = XFS_BHVTOI(dir_bdp); | |
2388 | mp = dp->i_mount; | |
2389 | ||
2390 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2391 | return XFS_ERROR(EIO); | |
2392 | ||
2393 | namelen = VNAMELEN(dentry); | |
2394 | ||
17370097 VA |
2395 | if (!xfs_get_dir_entry(dentry, &ip)) { |
2396 | dm_di_mode = ip->i_d.di_mode; | |
2397 | IRELE(ip); | |
2398 | } | |
2399 | ||
1da177e4 LT |
2400 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) { |
2401 | error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dir_vp, | |
2402 | DM_RIGHT_NULL, NULL, DM_RIGHT_NULL, | |
17370097 | 2403 | name, NULL, dm_di_mode, 0, 0); |
1da177e4 LT |
2404 | if (error) |
2405 | return error; | |
2406 | } | |
2407 | ||
2408 | /* From this point on, return through std_return */ | |
2409 | ip = NULL; | |
2410 | ||
2411 | /* | |
2412 | * We need to get a reference to ip before we get our log | |
2413 | * reservation. The reason for this is that we cannot call | |
2414 | * xfs_iget for an inode for which we do not have a reference | |
2415 | * once we've acquired a log reservation. This is because the | |
2416 | * inode we are trying to get might be in xfs_inactive going | |
2417 | * for a log reservation. Since we'll have to wait for the | |
2418 | * inactive code to complete before returning from xfs_iget, | |
2419 | * we need to make sure that we don't have log space reserved | |
c41564b5 | 2420 | * when we call xfs_iget. Instead we get an unlocked reference |
1da177e4 LT |
2421 | * to the inode before getting our log reservation. |
2422 | */ | |
2423 | error = xfs_get_dir_entry(dentry, &ip); | |
2424 | if (error) { | |
2425 | REMOVE_DEBUG_TRACE(__LINE__); | |
2426 | goto std_return; | |
2427 | } | |
2428 | ||
2429 | dm_di_mode = ip->i_d.di_mode; | |
2430 | ||
2431 | vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address); | |
2432 | ||
2433 | ITRACE(ip); | |
2434 | ||
2435 | error = XFS_QM_DQATTACH(mp, dp, 0); | |
2436 | if (!error && dp != ip) | |
2437 | error = XFS_QM_DQATTACH(mp, ip, 0); | |
2438 | if (error) { | |
2439 | REMOVE_DEBUG_TRACE(__LINE__); | |
2440 | IRELE(ip); | |
2441 | goto std_return; | |
2442 | } | |
2443 | ||
2444 | tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); | |
2445 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
2446 | /* | |
2447 | * We try to get the real space reservation first, | |
2448 | * allowing for directory btree deletion(s) implying | |
2449 | * possible bmap insert(s). If we can't get the space | |
2450 | * reservation then we use 0 instead, and avoid the bmap | |
2451 | * btree insert(s) in the directory code by, if the bmap | |
2452 | * insert tries to happen, instead trimming the LAST | |
2453 | * block from the directory. | |
2454 | */ | |
2455 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
2456 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
2457 | XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT); | |
2458 | if (error == ENOSPC) { | |
2459 | resblks = 0; | |
2460 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
2461 | XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT); | |
2462 | } | |
2463 | if (error) { | |
2464 | ASSERT(error != ENOSPC); | |
2465 | REMOVE_DEBUG_TRACE(__LINE__); | |
2466 | xfs_trans_cancel(tp, 0); | |
2467 | IRELE(ip); | |
2468 | return error; | |
2469 | } | |
2470 | ||
e9ed9d22 | 2471 | error = xfs_lock_dir_and_entry(dp, ip); |
1da177e4 LT |
2472 | if (error) { |
2473 | REMOVE_DEBUG_TRACE(__LINE__); | |
2474 | xfs_trans_cancel(tp, cancel_flags); | |
2475 | IRELE(ip); | |
2476 | goto std_return; | |
2477 | } | |
2478 | ||
2479 | /* | |
2480 | * At this point, we've gotten both the directory and the entry | |
2481 | * inodes locked. | |
2482 | */ | |
2483 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); | |
2484 | if (dp != ip) { | |
2485 | /* | |
2486 | * Increment vnode ref count only in this case since | |
2487 | * there's an extra vnode reference in the case where | |
2488 | * dp == ip. | |
2489 | */ | |
2490 | IHOLD(dp); | |
2491 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2492 | } | |
2493 | ||
2494 | /* | |
2495 | * Entry must exist since we did a lookup in xfs_lock_dir_and_entry. | |
2496 | */ | |
2497 | XFS_BMAP_INIT(&free_list, &first_block); | |
f6c2d1fa NS |
2498 | error = xfs_dir_removename(tp, dp, name, namelen, ip->i_ino, |
2499 | &first_block, &free_list, 0); | |
1da177e4 LT |
2500 | if (error) { |
2501 | ASSERT(error != ENOENT); | |
2502 | REMOVE_DEBUG_TRACE(__LINE__); | |
2503 | goto error1; | |
2504 | } | |
2505 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2506 | ||
2507 | dp->i_gen++; | |
2508 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
2509 | ||
2510 | error = xfs_droplink(tp, ip); | |
2511 | if (error) { | |
2512 | REMOVE_DEBUG_TRACE(__LINE__); | |
2513 | goto error1; | |
2514 | } | |
2515 | ||
2516 | /* Determine if this is the last link while | |
2517 | * we are in the transaction. | |
2518 | */ | |
2519 | link_zero = (ip)->i_d.di_nlink==0; | |
2520 | ||
2521 | /* | |
2522 | * Take an extra ref on the inode so that it doesn't | |
2523 | * go to xfs_inactive() from within the commit. | |
2524 | */ | |
2525 | IHOLD(ip); | |
2526 | ||
2527 | /* | |
2528 | * If this is a synchronous mount, make sure that the | |
2529 | * remove transaction goes to disk before returning to | |
2530 | * the user. | |
2531 | */ | |
2532 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2533 | xfs_trans_set_sync(tp); | |
2534 | } | |
2535 | ||
f7c99b6f | 2536 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2537 | if (error) { |
2538 | REMOVE_DEBUG_TRACE(__LINE__); | |
2539 | goto error_rele; | |
2540 | } | |
2541 | ||
1c72bf90 | 2542 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2543 | if (error) { |
2544 | IRELE(ip); | |
2545 | goto std_return; | |
2546 | } | |
2547 | ||
2548 | /* | |
2549 | * Before we drop our extra reference to the inode, purge it | |
2550 | * from the refcache if it is there. By waiting until afterwards | |
2551 | * to do the IRELE, we ensure that we won't go inactive in the | |
2552 | * xfs_refcache_purge_ip routine (although that would be OK). | |
2553 | */ | |
2554 | xfs_refcache_purge_ip(ip); | |
2555 | ||
2556 | vn_trace_exit(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address); | |
2557 | ||
2558 | /* | |
2559 | * Let interposed file systems know about removed links. | |
2560 | */ | |
67fcaa73 | 2561 | bhv_vop_link_removed(XFS_ITOV(ip), dir_vp, link_zero); |
1da177e4 LT |
2562 | |
2563 | IRELE(ip); | |
2564 | ||
2565 | /* Fall through to std_return with error = 0 */ | |
2566 | std_return: | |
2567 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, | |
2568 | DM_EVENT_POSTREMOVE)) { | |
2569 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE, | |
2570 | dir_vp, DM_RIGHT_NULL, | |
2571 | NULL, DM_RIGHT_NULL, | |
2572 | name, NULL, dm_di_mode, error, 0); | |
2573 | } | |
2574 | return error; | |
2575 | ||
2576 | error1: | |
2577 | xfs_bmap_cancel(&free_list); | |
2578 | cancel_flags |= XFS_TRANS_ABORT; | |
2579 | xfs_trans_cancel(tp, cancel_flags); | |
2580 | goto std_return; | |
2581 | ||
2582 | error_rele: | |
2583 | /* | |
2584 | * In this case make sure to not release the inode until after | |
2585 | * the current transaction is aborted. Releasing it beforehand | |
2586 | * can cause us to go to xfs_inactive and start a recursive | |
2587 | * transaction which can easily deadlock with the current one. | |
2588 | */ | |
2589 | xfs_bmap_cancel(&free_list); | |
2590 | cancel_flags |= XFS_TRANS_ABORT; | |
2591 | xfs_trans_cancel(tp, cancel_flags); | |
2592 | ||
2593 | /* | |
2594 | * Before we drop our extra reference to the inode, purge it | |
2595 | * from the refcache if it is there. By waiting until afterwards | |
2596 | * to do the IRELE, we ensure that we won't go inactive in the | |
2597 | * xfs_refcache_purge_ip routine (although that would be OK). | |
2598 | */ | |
2599 | xfs_refcache_purge_ip(ip); | |
2600 | ||
2601 | IRELE(ip); | |
2602 | ||
2603 | goto std_return; | |
2604 | } | |
2605 | ||
2606 | ||
2607 | /* | |
2608 | * xfs_link | |
2609 | * | |
2610 | */ | |
2611 | STATIC int | |
2612 | xfs_link( | |
2613 | bhv_desc_t *target_dir_bdp, | |
67fcaa73 | 2614 | bhv_vnode_t *src_vp, |
8285fb58 | 2615 | bhv_vname_t *dentry, |
1da177e4 LT |
2616 | cred_t *credp) |
2617 | { | |
2618 | xfs_inode_t *tdp, *sip; | |
2619 | xfs_trans_t *tp; | |
2620 | xfs_mount_t *mp; | |
2621 | xfs_inode_t *ips[2]; | |
2622 | int error; | |
2623 | xfs_bmap_free_t free_list; | |
2624 | xfs_fsblock_t first_block; | |
2625 | int cancel_flags; | |
2626 | int committed; | |
67fcaa73 | 2627 | bhv_vnode_t *target_dir_vp; |
1da177e4 LT |
2628 | int resblks; |
2629 | char *target_name = VNAME(dentry); | |
2630 | int target_namelen; | |
2631 | ||
2632 | target_dir_vp = BHV_TO_VNODE(target_dir_bdp); | |
2633 | vn_trace_entry(target_dir_vp, __FUNCTION__, (inst_t *)__return_address); | |
2634 | vn_trace_entry(src_vp, __FUNCTION__, (inst_t *)__return_address); | |
2635 | ||
2636 | target_namelen = VNAMELEN(dentry); | |
b71d300c | 2637 | ASSERT(!VN_ISDIR(src_vp)); |
1da177e4 | 2638 | |
75e17b3c | 2639 | sip = xfs_vtoi(src_vp); |
1da177e4 LT |
2640 | tdp = XFS_BHVTOI(target_dir_bdp); |
2641 | mp = tdp->i_mount; | |
2642 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2643 | return XFS_ERROR(EIO); | |
2644 | ||
2645 | if (DM_EVENT_ENABLED(src_vp->v_vfsp, tdp, DM_EVENT_LINK)) { | |
2646 | error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK, | |
2647 | target_dir_vp, DM_RIGHT_NULL, | |
2648 | src_vp, DM_RIGHT_NULL, | |
2649 | target_name, NULL, 0, 0, 0); | |
2650 | if (error) | |
2651 | return error; | |
2652 | } | |
2653 | ||
2654 | /* Return through std_return after this point. */ | |
2655 | ||
2656 | error = XFS_QM_DQATTACH(mp, sip, 0); | |
2657 | if (!error && sip != tdp) | |
2658 | error = XFS_QM_DQATTACH(mp, tdp, 0); | |
2659 | if (error) | |
2660 | goto std_return; | |
2661 | ||
2662 | tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); | |
2663 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
2664 | resblks = XFS_LINK_SPACE_RES(mp, target_namelen); | |
2665 | error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, | |
2666 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
2667 | if (error == ENOSPC) { | |
2668 | resblks = 0; | |
2669 | error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, | |
2670 | XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); | |
2671 | } | |
2672 | if (error) { | |
2673 | cancel_flags = 0; | |
2674 | goto error_return; | |
2675 | } | |
2676 | ||
2677 | if (sip->i_ino < tdp->i_ino) { | |
2678 | ips[0] = sip; | |
2679 | ips[1] = tdp; | |
2680 | } else { | |
2681 | ips[0] = tdp; | |
2682 | ips[1] = sip; | |
2683 | } | |
2684 | ||
2685 | xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL); | |
2686 | ||
2687 | /* | |
2688 | * Increment vnode ref counts since xfs_trans_commit & | |
2689 | * xfs_trans_cancel will both unlock the inodes and | |
2690 | * decrement the associated ref counts. | |
2691 | */ | |
2692 | VN_HOLD(src_vp); | |
2693 | VN_HOLD(target_dir_vp); | |
2694 | xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); | |
2695 | xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); | |
2696 | ||
2697 | /* | |
2698 | * If the source has too many links, we can't make any more to it. | |
2699 | */ | |
2700 | if (sip->i_d.di_nlink >= XFS_MAXLINK) { | |
2701 | error = XFS_ERROR(EMLINK); | |
2702 | goto error_return; | |
2703 | } | |
2704 | ||
365ca83d NS |
2705 | /* |
2706 | * If we are using project inheritance, we only allow hard link | |
2707 | * creation in our tree when the project IDs are the same; else | |
2708 | * the tree quota mechanism could be circumvented. | |
2709 | */ | |
2710 | if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && | |
2711 | (tdp->i_d.di_projid != sip->i_d.di_projid))) { | |
b1ecdda9 | 2712 | error = XFS_ERROR(EXDEV); |
365ca83d NS |
2713 | goto error_return; |
2714 | } | |
2715 | ||
1da177e4 | 2716 | if (resblks == 0 && |
f6c2d1fa | 2717 | (error = xfs_dir_canenter(tp, tdp, target_name, target_namelen))) |
1da177e4 LT |
2718 | goto error_return; |
2719 | ||
2720 | XFS_BMAP_INIT(&free_list, &first_block); | |
2721 | ||
f6c2d1fa | 2722 | error = xfs_dir_createname(tp, tdp, target_name, target_namelen, |
1da177e4 LT |
2723 | sip->i_ino, &first_block, &free_list, |
2724 | resblks); | |
2725 | if (error) | |
2726 | goto abort_return; | |
2727 | xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2728 | tdp->i_gen++; | |
2729 | xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); | |
2730 | ||
2731 | error = xfs_bumplink(tp, sip); | |
b71d300c | 2732 | if (error) |
1da177e4 | 2733 | goto abort_return; |
1da177e4 LT |
2734 | |
2735 | /* | |
2736 | * If this is a synchronous mount, make sure that the | |
2737 | * link transaction goes to disk before returning to | |
2738 | * the user. | |
2739 | */ | |
2740 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2741 | xfs_trans_set_sync(tp); | |
2742 | } | |
2743 | ||
f7c99b6f | 2744 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
2745 | if (error) { |
2746 | xfs_bmap_cancel(&free_list); | |
2747 | goto abort_return; | |
2748 | } | |
2749 | ||
1c72bf90 | 2750 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
b71d300c | 2751 | if (error) |
1da177e4 | 2752 | goto std_return; |
1da177e4 LT |
2753 | |
2754 | /* Fall through to std_return with error = 0. */ | |
2755 | std_return: | |
2756 | if (DM_EVENT_ENABLED(src_vp->v_vfsp, sip, | |
2757 | DM_EVENT_POSTLINK)) { | |
2758 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK, | |
2759 | target_dir_vp, DM_RIGHT_NULL, | |
2760 | src_vp, DM_RIGHT_NULL, | |
2761 | target_name, NULL, 0, error, 0); | |
2762 | } | |
2763 | return error; | |
2764 | ||
2765 | abort_return: | |
2766 | cancel_flags |= XFS_TRANS_ABORT; | |
2767 | /* FALLTHROUGH */ | |
014c2544 | 2768 | |
1da177e4 LT |
2769 | error_return: |
2770 | xfs_trans_cancel(tp, cancel_flags); | |
1da177e4 LT |
2771 | goto std_return; |
2772 | } | |
b71d300c AD |
2773 | |
2774 | ||
1da177e4 LT |
2775 | /* |
2776 | * xfs_mkdir | |
2777 | * | |
2778 | */ | |
2779 | STATIC int | |
2780 | xfs_mkdir( | |
2781 | bhv_desc_t *dir_bdp, | |
8285fb58 NS |
2782 | bhv_vname_t *dentry, |
2783 | bhv_vattr_t *vap, | |
67fcaa73 | 2784 | bhv_vnode_t **vpp, |
1da177e4 LT |
2785 | cred_t *credp) |
2786 | { | |
2787 | char *dir_name = VNAME(dentry); | |
2788 | xfs_inode_t *dp; | |
2789 | xfs_inode_t *cdp; /* inode of created dir */ | |
67fcaa73 | 2790 | bhv_vnode_t *cvp; /* vnode of created dir */ |
1da177e4 LT |
2791 | xfs_trans_t *tp; |
2792 | xfs_mount_t *mp; | |
2793 | int cancel_flags; | |
2794 | int error; | |
2795 | int committed; | |
2796 | xfs_bmap_free_t free_list; | |
2797 | xfs_fsblock_t first_block; | |
67fcaa73 | 2798 | bhv_vnode_t *dir_vp; |
1da177e4 LT |
2799 | boolean_t dp_joined_to_trans; |
2800 | boolean_t created = B_FALSE; | |
2801 | int dm_event_sent = 0; | |
2802 | xfs_prid_t prid; | |
2803 | struct xfs_dquot *udqp, *gdqp; | |
2804 | uint resblks; | |
2805 | int dm_di_mode; | |
2806 | int dir_namelen; | |
2807 | ||
2808 | dir_vp = BHV_TO_VNODE(dir_bdp); | |
2809 | dp = XFS_BHVTOI(dir_bdp); | |
2810 | mp = dp->i_mount; | |
2811 | ||
2812 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2813 | return XFS_ERROR(EIO); | |
2814 | ||
2815 | dir_namelen = VNAMELEN(dentry); | |
2816 | ||
2817 | tp = NULL; | |
2818 | dp_joined_to_trans = B_FALSE; | |
0432dab2 | 2819 | dm_di_mode = vap->va_mode; |
1da177e4 LT |
2820 | |
2821 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) { | |
2822 | error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, | |
2823 | dir_vp, DM_RIGHT_NULL, NULL, | |
2824 | DM_RIGHT_NULL, dir_name, NULL, | |
2825 | dm_di_mode, 0, 0); | |
2826 | if (error) | |
2827 | return error; | |
2828 | dm_event_sent = 1; | |
2829 | } | |
2830 | ||
2831 | /* Return through std_return after this point. */ | |
2832 | ||
2833 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); | |
2834 | ||
2835 | mp = dp->i_mount; | |
2836 | udqp = gdqp = NULL; | |
365ca83d NS |
2837 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
2838 | prid = dp->i_d.di_projid; | |
2839 | else if (vap->va_mask & XFS_AT_PROJID) | |
1da177e4 LT |
2840 | prid = (xfs_prid_t)vap->va_projid; |
2841 | else | |
2842 | prid = (xfs_prid_t)dfltprid; | |
2843 | ||
2844 | /* | |
2845 | * Make sure that we have allocated dquot(s) on disk. | |
2846 | */ | |
2847 | error = XFS_QM_DQVOPALLOC(mp, dp, | |
c8ad20ff | 2848 | current_fsuid(credp), current_fsgid(credp), prid, |
1da177e4 LT |
2849 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
2850 | if (error) | |
2851 | goto std_return; | |
2852 | ||
2853 | tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); | |
2854 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
2855 | resblks = XFS_MKDIR_SPACE_RES(mp, dir_namelen); | |
2856 | error = xfs_trans_reserve(tp, resblks, XFS_MKDIR_LOG_RES(mp), 0, | |
2857 | XFS_TRANS_PERM_LOG_RES, XFS_MKDIR_LOG_COUNT); | |
2858 | if (error == ENOSPC) { | |
2859 | resblks = 0; | |
2860 | error = xfs_trans_reserve(tp, 0, XFS_MKDIR_LOG_RES(mp), 0, | |
2861 | XFS_TRANS_PERM_LOG_RES, | |
2862 | XFS_MKDIR_LOG_COUNT); | |
2863 | } | |
2864 | if (error) { | |
2865 | cancel_flags = 0; | |
2866 | dp = NULL; | |
2867 | goto error_return; | |
2868 | } | |
2869 | ||
f7c66ce3 | 2870 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
1da177e4 LT |
2871 | |
2872 | /* | |
2873 | * Check for directory link count overflow. | |
2874 | */ | |
2875 | if (dp->i_d.di_nlink >= XFS_MAXLINK) { | |
2876 | error = XFS_ERROR(EMLINK); | |
2877 | goto error_return; | |
2878 | } | |
2879 | ||
2880 | /* | |
2881 | * Reserve disk quota and the inode. | |
2882 | */ | |
2883 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); | |
2884 | if (error) | |
2885 | goto error_return; | |
2886 | ||
2887 | if (resblks == 0 && | |
f6c2d1fa | 2888 | (error = xfs_dir_canenter(tp, dp, dir_name, dir_namelen))) |
1da177e4 LT |
2889 | goto error_return; |
2890 | /* | |
2891 | * create the directory inode. | |
2892 | */ | |
0432dab2 | 2893 | error = xfs_dir_ialloc(&tp, dp, vap->va_mode, 2, |
1da177e4 LT |
2894 | 0, credp, prid, resblks > 0, |
2895 | &cdp, NULL); | |
2896 | if (error) { | |
2897 | if (error == ENOSPC) | |
2898 | goto error_return; | |
2899 | goto abort_return; | |
2900 | } | |
2901 | ITRACE(cdp); | |
2902 | ||
2903 | /* | |
2904 | * Now we add the directory inode to the transaction. | |
2905 | * We waited until now since xfs_dir_ialloc might start | |
2906 | * a new transaction. Had we joined the transaction | |
2907 | * earlier, the locks might have gotten released. | |
2908 | */ | |
2909 | VN_HOLD(dir_vp); | |
2910 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); | |
2911 | dp_joined_to_trans = B_TRUE; | |
2912 | ||
2913 | XFS_BMAP_INIT(&free_list, &first_block); | |
2914 | ||
f6c2d1fa NS |
2915 | error = xfs_dir_createname(tp, dp, dir_name, dir_namelen, cdp->i_ino, |
2916 | &first_block, &free_list, resblks ? | |
2917 | resblks - XFS_IALLOC_SPACE_RES(mp) : 0); | |
1da177e4 LT |
2918 | if (error) { |
2919 | ASSERT(error != ENOSPC); | |
2920 | goto error1; | |
2921 | } | |
2922 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
2923 | ||
2924 | /* | |
2925 | * Bump the in memory version number of the parent directory | |
2926 | * so that other processes accessing it will recognize that | |
2927 | * the directory has changed. | |
2928 | */ | |
2929 | dp->i_gen++; | |
2930 | ||
f6c2d1fa NS |
2931 | error = xfs_dir_init(tp, cdp, dp); |
2932 | if (error) | |
1da177e4 | 2933 | goto error2; |
1da177e4 LT |
2934 | |
2935 | cdp->i_gen = 1; | |
2936 | error = xfs_bumplink(tp, dp); | |
f6c2d1fa | 2937 | if (error) |
1da177e4 | 2938 | goto error2; |
1da177e4 LT |
2939 | |
2940 | cvp = XFS_ITOV(cdp); | |
2941 | ||
2942 | created = B_TRUE; | |
2943 | ||
2944 | *vpp = cvp; | |
2945 | IHOLD(cdp); | |
2946 | ||
2947 | /* | |
2948 | * Attach the dquots to the new inode and modify the icount incore. | |
2949 | */ | |
2950 | XFS_QM_DQVOPCREATE(mp, tp, cdp, udqp, gdqp); | |
2951 | ||
2952 | /* | |
2953 | * If this is a synchronous mount, make sure that the | |
2954 | * mkdir transaction goes to disk before returning to | |
2955 | * the user. | |
2956 | */ | |
2957 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
2958 | xfs_trans_set_sync(tp); | |
2959 | } | |
2960 | ||
f7c99b6f | 2961 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
2962 | if (error) { |
2963 | IRELE(cdp); | |
2964 | goto error2; | |
2965 | } | |
2966 | ||
1c72bf90 | 2967 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
2968 | XFS_QM_DQRELE(mp, udqp); |
2969 | XFS_QM_DQRELE(mp, gdqp); | |
2970 | if (error) { | |
2971 | IRELE(cdp); | |
2972 | } | |
2973 | ||
2974 | /* Fall through to std_return with error = 0 or errno from | |
2975 | * xfs_trans_commit. */ | |
2976 | ||
2977 | std_return: | |
2978 | if ( (created || (error != 0 && dm_event_sent != 0)) && | |
2979 | DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp), | |
2980 | DM_EVENT_POSTCREATE)) { | |
2981 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, | |
2982 | dir_vp, DM_RIGHT_NULL, | |
2983 | created ? XFS_ITOV(cdp):NULL, | |
2984 | DM_RIGHT_NULL, | |
2985 | dir_name, NULL, | |
2986 | dm_di_mode, error, 0); | |
2987 | } | |
2988 | return error; | |
2989 | ||
2990 | error2: | |
2991 | error1: | |
2992 | xfs_bmap_cancel(&free_list); | |
2993 | abort_return: | |
2994 | cancel_flags |= XFS_TRANS_ABORT; | |
2995 | error_return: | |
2996 | xfs_trans_cancel(tp, cancel_flags); | |
2997 | XFS_QM_DQRELE(mp, udqp); | |
2998 | XFS_QM_DQRELE(mp, gdqp); | |
2999 | ||
3000 | if (!dp_joined_to_trans && (dp != NULL)) { | |
3001 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
3002 | } | |
3003 | ||
3004 | goto std_return; | |
3005 | } | |
3006 | ||
3007 | ||
3008 | /* | |
3009 | * xfs_rmdir | |
3010 | * | |
3011 | */ | |
3012 | STATIC int | |
3013 | xfs_rmdir( | |
3014 | bhv_desc_t *dir_bdp, | |
8285fb58 | 3015 | bhv_vname_t *dentry, |
1da177e4 LT |
3016 | cred_t *credp) |
3017 | { | |
3018 | char *name = VNAME(dentry); | |
3019 | xfs_inode_t *dp; | |
3020 | xfs_inode_t *cdp; /* child directory */ | |
3021 | xfs_trans_t *tp; | |
3022 | xfs_mount_t *mp; | |
3023 | int error; | |
3024 | xfs_bmap_free_t free_list; | |
3025 | xfs_fsblock_t first_block; | |
3026 | int cancel_flags; | |
3027 | int committed; | |
67fcaa73 | 3028 | bhv_vnode_t *dir_vp; |
17370097 | 3029 | int dm_di_mode = S_IFDIR; |
1da177e4 LT |
3030 | int last_cdp_link; |
3031 | int namelen; | |
3032 | uint resblks; | |
3033 | ||
3034 | dir_vp = BHV_TO_VNODE(dir_bdp); | |
3035 | dp = XFS_BHVTOI(dir_bdp); | |
3036 | mp = dp->i_mount; | |
3037 | ||
3038 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); | |
3039 | ||
3040 | if (XFS_FORCED_SHUTDOWN(XFS_BHVTOI(dir_bdp)->i_mount)) | |
3041 | return XFS_ERROR(EIO); | |
3042 | namelen = VNAMELEN(dentry); | |
3043 | ||
17370097 VA |
3044 | if (!xfs_get_dir_entry(dentry, &cdp)) { |
3045 | dm_di_mode = cdp->i_d.di_mode; | |
3046 | IRELE(cdp); | |
3047 | } | |
3048 | ||
1da177e4 LT |
3049 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) { |
3050 | error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, | |
3051 | dir_vp, DM_RIGHT_NULL, | |
3052 | NULL, DM_RIGHT_NULL, | |
17370097 | 3053 | name, NULL, dm_di_mode, 0, 0); |
1da177e4 LT |
3054 | if (error) |
3055 | return XFS_ERROR(error); | |
3056 | } | |
3057 | ||
3058 | /* Return through std_return after this point. */ | |
3059 | ||
3060 | cdp = NULL; | |
3061 | ||
3062 | /* | |
3063 | * We need to get a reference to cdp before we get our log | |
3064 | * reservation. The reason for this is that we cannot call | |
3065 | * xfs_iget for an inode for which we do not have a reference | |
3066 | * once we've acquired a log reservation. This is because the | |
3067 | * inode we are trying to get might be in xfs_inactive going | |
3068 | * for a log reservation. Since we'll have to wait for the | |
3069 | * inactive code to complete before returning from xfs_iget, | |
3070 | * we need to make sure that we don't have log space reserved | |
c41564b5 | 3071 | * when we call xfs_iget. Instead we get an unlocked reference |
1da177e4 LT |
3072 | * to the inode before getting our log reservation. |
3073 | */ | |
3074 | error = xfs_get_dir_entry(dentry, &cdp); | |
3075 | if (error) { | |
3076 | REMOVE_DEBUG_TRACE(__LINE__); | |
3077 | goto std_return; | |
3078 | } | |
3079 | mp = dp->i_mount; | |
3080 | dm_di_mode = cdp->i_d.di_mode; | |
3081 | ||
3082 | /* | |
3083 | * Get the dquots for the inodes. | |
3084 | */ | |
3085 | error = XFS_QM_DQATTACH(mp, dp, 0); | |
3086 | if (!error && dp != cdp) | |
3087 | error = XFS_QM_DQATTACH(mp, cdp, 0); | |
3088 | if (error) { | |
3089 | IRELE(cdp); | |
3090 | REMOVE_DEBUG_TRACE(__LINE__); | |
3091 | goto std_return; | |
3092 | } | |
3093 | ||
3094 | tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); | |
3095 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
3096 | /* | |
3097 | * We try to get the real space reservation first, | |
3098 | * allowing for directory btree deletion(s) implying | |
3099 | * possible bmap insert(s). If we can't get the space | |
3100 | * reservation then we use 0 instead, and avoid the bmap | |
3101 | * btree insert(s) in the directory code by, if the bmap | |
3102 | * insert tries to happen, instead trimming the LAST | |
3103 | * block from the directory. | |
3104 | */ | |
3105 | resblks = XFS_REMOVE_SPACE_RES(mp); | |
3106 | error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, | |
3107 | XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT); | |
3108 | if (error == ENOSPC) { | |
3109 | resblks = 0; | |
3110 | error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, | |
3111 | XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT); | |
3112 | } | |
3113 | if (error) { | |
3114 | ASSERT(error != ENOSPC); | |
3115 | cancel_flags = 0; | |
3116 | IRELE(cdp); | |
3117 | goto error_return; | |
3118 | } | |
3119 | XFS_BMAP_INIT(&free_list, &first_block); | |
3120 | ||
3121 | /* | |
3122 | * Now lock the child directory inode and the parent directory | |
3123 | * inode in the proper order. This will take care of validating | |
3124 | * that the directory entry for the child directory inode has | |
3125 | * not changed while we were obtaining a log reservation. | |
3126 | */ | |
e9ed9d22 | 3127 | error = xfs_lock_dir_and_entry(dp, cdp); |
1da177e4 LT |
3128 | if (error) { |
3129 | xfs_trans_cancel(tp, cancel_flags); | |
3130 | IRELE(cdp); | |
3131 | goto std_return; | |
3132 | } | |
3133 | ||
3134 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); | |
3135 | if (dp != cdp) { | |
3136 | /* | |
3137 | * Only increment the parent directory vnode count if | |
3138 | * we didn't bump it in looking up cdp. The only time | |
3139 | * we don't bump it is when we're looking up ".". | |
3140 | */ | |
3141 | VN_HOLD(dir_vp); | |
3142 | } | |
3143 | ||
3144 | ITRACE(cdp); | |
3145 | xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL); | |
3146 | ||
3147 | ASSERT(cdp->i_d.di_nlink >= 2); | |
3148 | if (cdp->i_d.di_nlink != 2) { | |
3149 | error = XFS_ERROR(ENOTEMPTY); | |
3150 | goto error_return; | |
3151 | } | |
f6c2d1fa | 3152 | if (!xfs_dir_isempty(cdp)) { |
1da177e4 LT |
3153 | error = XFS_ERROR(ENOTEMPTY); |
3154 | goto error_return; | |
3155 | } | |
3156 | ||
f6c2d1fa NS |
3157 | error = xfs_dir_removename(tp, dp, name, namelen, cdp->i_ino, |
3158 | &first_block, &free_list, resblks); | |
3159 | if (error) | |
1da177e4 | 3160 | goto error1; |
1da177e4 LT |
3161 | |
3162 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
3163 | ||
3164 | /* | |
3165 | * Bump the in memory generation count on the parent | |
3166 | * directory so that other can know that it has changed. | |
3167 | */ | |
3168 | dp->i_gen++; | |
3169 | ||
3170 | /* | |
3171 | * Drop the link from cdp's "..". | |
3172 | */ | |
3173 | error = xfs_droplink(tp, dp); | |
3174 | if (error) { | |
3175 | goto error1; | |
3176 | } | |
3177 | ||
3178 | /* | |
3179 | * Drop the link from dp to cdp. | |
3180 | */ | |
3181 | error = xfs_droplink(tp, cdp); | |
3182 | if (error) { | |
3183 | goto error1; | |
3184 | } | |
3185 | ||
3186 | /* | |
3187 | * Drop the "." link from cdp to self. | |
3188 | */ | |
3189 | error = xfs_droplink(tp, cdp); | |
3190 | if (error) { | |
3191 | goto error1; | |
3192 | } | |
3193 | ||
3194 | /* Determine these before committing transaction */ | |
3195 | last_cdp_link = (cdp)->i_d.di_nlink==0; | |
3196 | ||
3197 | /* | |
3198 | * Take an extra ref on the child vnode so that it | |
3199 | * does not go to xfs_inactive() from within the commit. | |
3200 | */ | |
3201 | IHOLD(cdp); | |
3202 | ||
3203 | /* | |
3204 | * If this is a synchronous mount, make sure that the | |
3205 | * rmdir transaction goes to disk before returning to | |
3206 | * the user. | |
3207 | */ | |
3208 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
3209 | xfs_trans_set_sync(tp); | |
3210 | } | |
3211 | ||
f7c99b6f | 3212 | error = xfs_bmap_finish (&tp, &free_list, &committed); |
1da177e4 LT |
3213 | if (error) { |
3214 | xfs_bmap_cancel(&free_list); | |
3215 | xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | | |
3216 | XFS_TRANS_ABORT)); | |
3217 | IRELE(cdp); | |
3218 | goto std_return; | |
3219 | } | |
3220 | ||
1c72bf90 | 3221 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
3222 | if (error) { |
3223 | IRELE(cdp); | |
3224 | goto std_return; | |
3225 | } | |
3226 | ||
3227 | ||
3228 | /* | |
3229 | * Let interposed file systems know about removed links. | |
3230 | */ | |
67fcaa73 | 3231 | bhv_vop_link_removed(XFS_ITOV(cdp), dir_vp, last_cdp_link); |
1da177e4 LT |
3232 | |
3233 | IRELE(cdp); | |
3234 | ||
3235 | /* Fall through to std_return with error = 0 or the errno | |
3236 | * from xfs_trans_commit. */ | |
bb19fba1 | 3237 | std_return: |
1da177e4 LT |
3238 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_POSTREMOVE)) { |
3239 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE, | |
3240 | dir_vp, DM_RIGHT_NULL, | |
3241 | NULL, DM_RIGHT_NULL, | |
3242 | name, NULL, dm_di_mode, | |
3243 | error, 0); | |
3244 | } | |
3245 | return error; | |
3246 | ||
bb19fba1 | 3247 | error1: |
1da177e4 LT |
3248 | xfs_bmap_cancel(&free_list); |
3249 | cancel_flags |= XFS_TRANS_ABORT; | |
014c2544 JJ |
3250 | /* FALLTHROUGH */ |
3251 | ||
bb19fba1 | 3252 | error_return: |
1da177e4 LT |
3253 | xfs_trans_cancel(tp, cancel_flags); |
3254 | goto std_return; | |
3255 | } | |
3256 | ||
3257 | ||
3258 | /* | |
1da177e4 LT |
3259 | * Read dp's entries starting at uiop->uio_offset and translate them into |
3260 | * bufsize bytes worth of struct dirents starting at bufbase. | |
3261 | */ | |
3262 | STATIC int | |
3263 | xfs_readdir( | |
3264 | bhv_desc_t *dir_bdp, | |
3265 | uio_t *uiop, | |
3266 | cred_t *credp, | |
3267 | int *eofp) | |
3268 | { | |
3269 | xfs_inode_t *dp; | |
3270 | xfs_trans_t *tp = NULL; | |
3271 | int error = 0; | |
3272 | uint lock_mode; | |
1da177e4 LT |
3273 | |
3274 | vn_trace_entry(BHV_TO_VNODE(dir_bdp), __FUNCTION__, | |
3275 | (inst_t *)__return_address); | |
3276 | dp = XFS_BHVTOI(dir_bdp); | |
3277 | ||
f6c2d1fa | 3278 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
1da177e4 | 3279 | return XFS_ERROR(EIO); |
1da177e4 LT |
3280 | |
3281 | lock_mode = xfs_ilock_map_shared(dp); | |
f6c2d1fa | 3282 | error = xfs_dir_getdents(tp, dp, uiop, eofp); |
1da177e4 LT |
3283 | xfs_iunlock_map_shared(dp, lock_mode); |
3284 | return error; | |
3285 | } | |
3286 | ||
3287 | ||
1da177e4 LT |
3288 | STATIC int |
3289 | xfs_symlink( | |
3290 | bhv_desc_t *dir_bdp, | |
8285fb58 NS |
3291 | bhv_vname_t *dentry, |
3292 | bhv_vattr_t *vap, | |
1da177e4 | 3293 | char *target_path, |
67fcaa73 | 3294 | bhv_vnode_t **vpp, |
1da177e4 LT |
3295 | cred_t *credp) |
3296 | { | |
3297 | xfs_trans_t *tp; | |
3298 | xfs_mount_t *mp; | |
3299 | xfs_inode_t *dp; | |
3300 | xfs_inode_t *ip; | |
3301 | int error; | |
3302 | int pathlen; | |
3303 | xfs_bmap_free_t free_list; | |
3304 | xfs_fsblock_t first_block; | |
3305 | boolean_t dp_joined_to_trans; | |
67fcaa73 | 3306 | bhv_vnode_t *dir_vp; |
1da177e4 LT |
3307 | uint cancel_flags; |
3308 | int committed; | |
3309 | xfs_fileoff_t first_fsb; | |
3310 | xfs_filblks_t fs_blocks; | |
3311 | int nmaps; | |
3312 | xfs_bmbt_irec_t mval[SYMLINK_MAPS]; | |
3313 | xfs_daddr_t d; | |
3314 | char *cur_chunk; | |
3315 | int byte_cnt; | |
3316 | int n; | |
3317 | xfs_buf_t *bp; | |
3318 | xfs_prid_t prid; | |
3319 | struct xfs_dquot *udqp, *gdqp; | |
3320 | uint resblks; | |
3321 | char *link_name = VNAME(dentry); | |
3322 | int link_namelen; | |
3323 | ||
3324 | *vpp = NULL; | |
3325 | dir_vp = BHV_TO_VNODE(dir_bdp); | |
3326 | dp = XFS_BHVTOI(dir_bdp); | |
3327 | dp_joined_to_trans = B_FALSE; | |
3328 | error = 0; | |
3329 | ip = NULL; | |
3330 | tp = NULL; | |
3331 | ||
3332 | vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); | |
3333 | ||
3334 | mp = dp->i_mount; | |
3335 | ||
3336 | if (XFS_FORCED_SHUTDOWN(mp)) | |
3337 | return XFS_ERROR(EIO); | |
3338 | ||
3339 | link_namelen = VNAMELEN(dentry); | |
3340 | ||
3341 | /* | |
3342 | * Check component lengths of the target path name. | |
3343 | */ | |
3344 | pathlen = strlen(target_path); | |
3345 | if (pathlen >= MAXPATHLEN) /* total string too long */ | |
3346 | return XFS_ERROR(ENAMETOOLONG); | |
3347 | if (pathlen >= MAXNAMELEN) { /* is any component too long? */ | |
3348 | int len, total; | |
3349 | char *path; | |
3350 | ||
f6c2d1fa | 3351 | for (total = 0, path = target_path; total < pathlen;) { |
1da177e4 LT |
3352 | /* |
3353 | * Skip any slashes. | |
3354 | */ | |
3355 | while(*path == '/') { | |
3356 | total++; | |
3357 | path++; | |
3358 | } | |
3359 | ||
3360 | /* | |
3361 | * Count up to the next slash or end of path. | |
3362 | * Error out if the component is bigger than MAXNAMELEN. | |
3363 | */ | |
3364 | for(len = 0; *path != '/' && total < pathlen;total++, path++) { | |
3365 | if (++len >= MAXNAMELEN) { | |
3366 | error = ENAMETOOLONG; | |
3367 | return error; | |
3368 | } | |
3369 | } | |
3370 | } | |
3371 | } | |
3372 | ||
3373 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_SYMLINK)) { | |
3374 | error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dir_vp, | |
3375 | DM_RIGHT_NULL, NULL, DM_RIGHT_NULL, | |
3376 | link_name, target_path, 0, 0, 0); | |
3377 | if (error) | |
3378 | return error; | |
3379 | } | |
3380 | ||
3381 | /* Return through std_return after this point. */ | |
3382 | ||
3383 | udqp = gdqp = NULL; | |
365ca83d NS |
3384 | if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
3385 | prid = dp->i_d.di_projid; | |
3386 | else if (vap->va_mask & XFS_AT_PROJID) | |
1da177e4 LT |
3387 | prid = (xfs_prid_t)vap->va_projid; |
3388 | else | |
3389 | prid = (xfs_prid_t)dfltprid; | |
3390 | ||
3391 | /* | |
3392 | * Make sure that we have allocated dquot(s) on disk. | |
3393 | */ | |
3394 | error = XFS_QM_DQVOPALLOC(mp, dp, | |
c8ad20ff | 3395 | current_fsuid(credp), current_fsgid(credp), prid, |
1da177e4 LT |
3396 | XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
3397 | if (error) | |
3398 | goto std_return; | |
3399 | ||
3400 | tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); | |
3401 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
3402 | /* | |
3403 | * The symlink will fit into the inode data fork? | |
3404 | * There can't be any attributes so we get the whole variable part. | |
3405 | */ | |
3406 | if (pathlen <= XFS_LITINO(mp)) | |
3407 | fs_blocks = 0; | |
3408 | else | |
3409 | fs_blocks = XFS_B_TO_FSB(mp, pathlen); | |
3410 | resblks = XFS_SYMLINK_SPACE_RES(mp, link_namelen, fs_blocks); | |
3411 | error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, | |
3412 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
3413 | if (error == ENOSPC && fs_blocks == 0) { | |
3414 | resblks = 0; | |
3415 | error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, | |
3416 | XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); | |
3417 | } | |
3418 | if (error) { | |
3419 | cancel_flags = 0; | |
3420 | dp = NULL; | |
3421 | goto error_return; | |
3422 | } | |
3423 | ||
f7c66ce3 | 3424 | xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); |
1da177e4 LT |
3425 | |
3426 | /* | |
3427 | * Check whether the directory allows new symlinks or not. | |
3428 | */ | |
3429 | if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { | |
3430 | error = XFS_ERROR(EPERM); | |
3431 | goto error_return; | |
3432 | } | |
3433 | ||
3434 | /* | |
3435 | * Reserve disk quota : blocks and inode. | |
3436 | */ | |
3437 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); | |
3438 | if (error) | |
3439 | goto error_return; | |
3440 | ||
3441 | /* | |
3442 | * Check for ability to enter directory entry, if no space reserved. | |
3443 | */ | |
3444 | if (resblks == 0 && | |
f6c2d1fa | 3445 | (error = xfs_dir_canenter(tp, dp, link_name, link_namelen))) |
1da177e4 LT |
3446 | goto error_return; |
3447 | /* | |
3448 | * Initialize the bmap freelist prior to calling either | |
3449 | * bmapi or the directory create code. | |
3450 | */ | |
3451 | XFS_BMAP_INIT(&free_list, &first_block); | |
3452 | ||
3453 | /* | |
3454 | * Allocate an inode for the symlink. | |
3455 | */ | |
3456 | error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (vap->va_mode&~S_IFMT), | |
3457 | 1, 0, credp, prid, resblks > 0, &ip, NULL); | |
3458 | if (error) { | |
3459 | if (error == ENOSPC) | |
3460 | goto error_return; | |
3461 | goto error1; | |
3462 | } | |
3463 | ITRACE(ip); | |
3464 | ||
3465 | VN_HOLD(dir_vp); | |
3466 | xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); | |
3467 | dp_joined_to_trans = B_TRUE; | |
3468 | ||
3469 | /* | |
3470 | * Also attach the dquot(s) to it, if applicable. | |
3471 | */ | |
3472 | XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp); | |
3473 | ||
3474 | if (resblks) | |
3475 | resblks -= XFS_IALLOC_SPACE_RES(mp); | |
3476 | /* | |
3477 | * If the symlink will fit into the inode, write it inline. | |
3478 | */ | |
3479 | if (pathlen <= XFS_IFORK_DSIZE(ip)) { | |
3480 | xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); | |
3481 | memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); | |
3482 | ip->i_d.di_size = pathlen; | |
3483 | ||
3484 | /* | |
3485 | * The inode was initially created in extent format. | |
3486 | */ | |
3487 | ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); | |
3488 | ip->i_df.if_flags |= XFS_IFINLINE; | |
3489 | ||
3490 | ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; | |
3491 | xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); | |
3492 | ||
3493 | } else { | |
3494 | first_fsb = 0; | |
3495 | nmaps = SYMLINK_MAPS; | |
3496 | ||
3497 | error = xfs_bmapi(tp, ip, first_fsb, fs_blocks, | |
3498 | XFS_BMAPI_WRITE | XFS_BMAPI_METADATA, | |
3499 | &first_block, resblks, mval, &nmaps, | |
3e57ecf6 | 3500 | &free_list, NULL); |
1da177e4 LT |
3501 | if (error) { |
3502 | goto error1; | |
3503 | } | |
3504 | ||
3505 | if (resblks) | |
3506 | resblks -= fs_blocks; | |
3507 | ip->i_d.di_size = pathlen; | |
3508 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
3509 | ||
3510 | cur_chunk = target_path; | |
3511 | for (n = 0; n < nmaps; n++) { | |
3512 | d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); | |
3513 | byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); | |
3514 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, | |
3515 | BTOBB(byte_cnt), 0); | |
3516 | ASSERT(bp && !XFS_BUF_GETERROR(bp)); | |
3517 | if (pathlen < byte_cnt) { | |
3518 | byte_cnt = pathlen; | |
3519 | } | |
3520 | pathlen -= byte_cnt; | |
3521 | ||
3522 | memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt); | |
3523 | cur_chunk += byte_cnt; | |
3524 | ||
3525 | xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); | |
3526 | } | |
3527 | } | |
3528 | ||
3529 | /* | |
3530 | * Create the directory entry for the symlink. | |
3531 | */ | |
f6c2d1fa NS |
3532 | error = xfs_dir_createname(tp, dp, link_name, link_namelen, ip->i_ino, |
3533 | &first_block, &free_list, resblks); | |
3534 | if (error) | |
1da177e4 | 3535 | goto error1; |
1da177e4 LT |
3536 | xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
3537 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); | |
3538 | ||
3539 | /* | |
3540 | * Bump the in memory version number of the parent directory | |
3541 | * so that other processes accessing it will recognize that | |
3542 | * the directory has changed. | |
3543 | */ | |
3544 | dp->i_gen++; | |
3545 | ||
3546 | /* | |
3547 | * If this is a synchronous mount, make sure that the | |
3548 | * symlink transaction goes to disk before returning to | |
3549 | * the user. | |
3550 | */ | |
3551 | if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { | |
3552 | xfs_trans_set_sync(tp); | |
3553 | } | |
3554 | ||
3555 | /* | |
3556 | * xfs_trans_commit normally decrements the vnode ref count | |
3557 | * when it unlocks the inode. Since we want to return the | |
3558 | * vnode to the caller, we bump the vnode ref count now. | |
3559 | */ | |
3560 | IHOLD(ip); | |
3561 | ||
f7c99b6f | 3562 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
3563 | if (error) { |
3564 | goto error2; | |
3565 | } | |
1c72bf90 | 3566 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
3567 | XFS_QM_DQRELE(mp, udqp); |
3568 | XFS_QM_DQRELE(mp, gdqp); | |
3569 | ||
3570 | /* Fall through to std_return with error = 0 or errno from | |
3571 | * xfs_trans_commit */ | |
3572 | std_return: | |
3573 | if (DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp), | |
3574 | DM_EVENT_POSTSYMLINK)) { | |
3575 | (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK, | |
3576 | dir_vp, DM_RIGHT_NULL, | |
3577 | error ? NULL : XFS_ITOV(ip), | |
3578 | DM_RIGHT_NULL, link_name, target_path, | |
3579 | 0, error, 0); | |
3580 | } | |
3581 | ||
3582 | if (!error) { | |
67fcaa73 | 3583 | bhv_vnode_t *vp; |
1da177e4 LT |
3584 | |
3585 | ASSERT(ip); | |
3586 | vp = XFS_ITOV(ip); | |
3587 | *vpp = vp; | |
3588 | } | |
3589 | return error; | |
3590 | ||
3591 | error2: | |
3592 | IRELE(ip); | |
3593 | error1: | |
3594 | xfs_bmap_cancel(&free_list); | |
3595 | cancel_flags |= XFS_TRANS_ABORT; | |
3596 | error_return: | |
3597 | xfs_trans_cancel(tp, cancel_flags); | |
3598 | XFS_QM_DQRELE(mp, udqp); | |
3599 | XFS_QM_DQRELE(mp, gdqp); | |
3600 | ||
3601 | if (!dp_joined_to_trans && (dp != NULL)) { | |
3602 | xfs_iunlock(dp, XFS_ILOCK_EXCL); | |
3603 | } | |
3604 | ||
3605 | goto std_return; | |
3606 | } | |
3607 | ||
3608 | ||
3609 | /* | |
3610 | * xfs_fid2 | |
3611 | * | |
3612 | * A fid routine that takes a pointer to a previously allocated | |
3613 | * fid structure (like xfs_fast_fid) but uses a 64 bit inode number. | |
3614 | */ | |
3615 | STATIC int | |
3616 | xfs_fid2( | |
3617 | bhv_desc_t *bdp, | |
3618 | fid_t *fidp) | |
3619 | { | |
3620 | xfs_inode_t *ip; | |
3621 | xfs_fid2_t *xfid; | |
3622 | ||
3623 | vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__, | |
3624 | (inst_t *)__return_address); | |
3625 | ASSERT(sizeof(fid_t) >= sizeof(xfs_fid2_t)); | |
3626 | ||
3627 | xfid = (xfs_fid2_t *)fidp; | |
3628 | ip = XFS_BHVTOI(bdp); | |
3629 | xfid->fid_len = sizeof(xfs_fid2_t) - sizeof(xfid->fid_len); | |
3630 | xfid->fid_pad = 0; | |
3631 | /* | |
3632 | * use memcpy because the inode is a long long and there's no | |
3633 | * assurance that xfid->fid_ino is properly aligned. | |
3634 | */ | |
3635 | memcpy(&xfid->fid_ino, &ip->i_ino, sizeof(xfid->fid_ino)); | |
3636 | xfid->fid_gen = ip->i_d.di_gen; | |
3637 | ||
3638 | return 0; | |
3639 | } | |
3640 | ||
3641 | ||
3642 | /* | |
3643 | * xfs_rwlock | |
3644 | */ | |
3645 | int | |
3646 | xfs_rwlock( | |
3647 | bhv_desc_t *bdp, | |
8285fb58 | 3648 | bhv_vrwlock_t locktype) |
1da177e4 LT |
3649 | { |
3650 | xfs_inode_t *ip; | |
67fcaa73 | 3651 | bhv_vnode_t *vp; |
1da177e4 LT |
3652 | |
3653 | vp = BHV_TO_VNODE(bdp); | |
0432dab2 | 3654 | if (VN_ISDIR(vp)) |
1da177e4 LT |
3655 | return 1; |
3656 | ip = XFS_BHVTOI(bdp); | |
3657 | if (locktype == VRWLOCK_WRITE) { | |
3658 | xfs_ilock(ip, XFS_IOLOCK_EXCL); | |
3659 | } else if (locktype == VRWLOCK_TRY_READ) { | |
014c2544 | 3660 | return xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED); |
1da177e4 | 3661 | } else if (locktype == VRWLOCK_TRY_WRITE) { |
014c2544 | 3662 | return xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL); |
1da177e4 LT |
3663 | } else { |
3664 | ASSERT((locktype == VRWLOCK_READ) || | |
3665 | (locktype == VRWLOCK_WRITE_DIRECT)); | |
3666 | xfs_ilock(ip, XFS_IOLOCK_SHARED); | |
3667 | } | |
3668 | ||
3669 | return 1; | |
3670 | } | |
3671 | ||
3672 | ||
3673 | /* | |
3674 | * xfs_rwunlock | |
3675 | */ | |
3676 | void | |
3677 | xfs_rwunlock( | |
3678 | bhv_desc_t *bdp, | |
8285fb58 | 3679 | bhv_vrwlock_t locktype) |
1da177e4 LT |
3680 | { |
3681 | xfs_inode_t *ip; | |
67fcaa73 | 3682 | bhv_vnode_t *vp; |
1da177e4 LT |
3683 | |
3684 | vp = BHV_TO_VNODE(bdp); | |
0432dab2 | 3685 | if (VN_ISDIR(vp)) |
1da177e4 LT |
3686 | return; |
3687 | ip = XFS_BHVTOI(bdp); | |
3688 | if (locktype == VRWLOCK_WRITE) { | |
3689 | /* | |
3690 | * In the write case, we may have added a new entry to | |
3691 | * the reference cache. This might store a pointer to | |
3692 | * an inode to be released in this inode. If it is there, | |
3693 | * clear the pointer and release the inode after unlocking | |
3694 | * this one. | |
3695 | */ | |
3696 | xfs_refcache_iunlock(ip, XFS_IOLOCK_EXCL); | |
3697 | } else { | |
3698 | ASSERT((locktype == VRWLOCK_READ) || | |
3699 | (locktype == VRWLOCK_WRITE_DIRECT)); | |
3700 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
3701 | } | |
3702 | return; | |
3703 | } | |
3704 | ||
3705 | STATIC int | |
3706 | xfs_inode_flush( | |
3707 | bhv_desc_t *bdp, | |
3708 | int flags) | |
3709 | { | |
3710 | xfs_inode_t *ip; | |
3711 | xfs_mount_t *mp; | |
3712 | xfs_inode_log_item_t *iip; | |
3713 | int error = 0; | |
3714 | ||
3715 | ip = XFS_BHVTOI(bdp); | |
3716 | mp = ip->i_mount; | |
3717 | iip = ip->i_itemp; | |
3718 | ||
3719 | if (XFS_FORCED_SHUTDOWN(mp)) | |
3720 | return XFS_ERROR(EIO); | |
3721 | ||
3722 | /* | |
3723 | * Bypass inodes which have already been cleaned by | |
3724 | * the inode flush clustering code inside xfs_iflush | |
3725 | */ | |
3726 | if ((ip->i_update_core == 0) && | |
3727 | ((iip == NULL) || !(iip->ili_format.ilf_fields & XFS_ILOG_ALL))) | |
3728 | return 0; | |
3729 | ||
3730 | if (flags & FLUSH_LOG) { | |
3731 | if (iip && iip->ili_last_lsn) { | |
3732 | xlog_t *log = mp->m_log; | |
3733 | xfs_lsn_t sync_lsn; | |
3734 | int s, log_flags = XFS_LOG_FORCE; | |
3735 | ||
3736 | s = GRANT_LOCK(log); | |
3737 | sync_lsn = log->l_last_sync_lsn; | |
3738 | GRANT_UNLOCK(log, s); | |
3739 | ||
3740 | if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) <= 0)) | |
3741 | return 0; | |
3742 | ||
3743 | if (flags & FLUSH_SYNC) | |
3744 | log_flags |= XFS_LOG_SYNC; | |
3745 | return xfs_log_force(mp, iip->ili_last_lsn, log_flags); | |
3746 | } | |
3747 | } | |
3748 | ||
3749 | /* | |
3750 | * We make this non-blocking if the inode is contended, | |
3751 | * return EAGAIN to indicate to the caller that they | |
3752 | * did not succeed. This prevents the flush path from | |
3753 | * blocking on inodes inside another operation right | |
3754 | * now, they get caught later by xfs_sync. | |
3755 | */ | |
3756 | if (flags & FLUSH_INODE) { | |
3757 | int flush_flags; | |
3758 | ||
3759 | if (xfs_ipincount(ip)) | |
3760 | return EAGAIN; | |
3761 | ||
3762 | if (flags & FLUSH_SYNC) { | |
3763 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
3764 | xfs_iflock(ip); | |
3765 | } else if (xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) { | |
3766 | if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip)) { | |
3767 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
3768 | return EAGAIN; | |
3769 | } | |
3770 | } else { | |
3771 | return EAGAIN; | |
3772 | } | |
3773 | ||
3774 | if (flags & FLUSH_SYNC) | |
3775 | flush_flags = XFS_IFLUSH_SYNC; | |
3776 | else | |
3777 | flush_flags = XFS_IFLUSH_ASYNC; | |
3778 | ||
3779 | error = xfs_iflush(ip, flush_flags); | |
3780 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
3781 | } | |
3782 | ||
3783 | return error; | |
3784 | } | |
3785 | ||
1da177e4 LT |
3786 | int |
3787 | xfs_set_dmattrs ( | |
3788 | bhv_desc_t *bdp, | |
3789 | u_int evmask, | |
3790 | u_int16_t state, | |
3791 | cred_t *credp) | |
3792 | { | |
3793 | xfs_inode_t *ip; | |
3794 | xfs_trans_t *tp; | |
3795 | xfs_mount_t *mp; | |
3796 | int error; | |
3797 | ||
3798 | if (!capable(CAP_SYS_ADMIN)) | |
3799 | return XFS_ERROR(EPERM); | |
3800 | ||
3801 | ip = XFS_BHVTOI(bdp); | |
3802 | mp = ip->i_mount; | |
3803 | ||
3804 | if (XFS_FORCED_SHUTDOWN(mp)) | |
3805 | return XFS_ERROR(EIO); | |
3806 | ||
3807 | tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
3808 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
3809 | if (error) { | |
3810 | xfs_trans_cancel(tp, 0); | |
3811 | return error; | |
3812 | } | |
3813 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3814 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
3815 | ||
3816 | ip->i_iocore.io_dmevmask = ip->i_d.di_dmevmask = evmask; | |
3817 | ip->i_iocore.io_dmstate = ip->i_d.di_dmstate = state; | |
3818 | ||
3819 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
3820 | IHOLD(ip); | |
1c72bf90 | 3821 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
3822 | |
3823 | return error; | |
3824 | } | |
3825 | ||
1da177e4 LT |
3826 | STATIC int |
3827 | xfs_reclaim( | |
3828 | bhv_desc_t *bdp) | |
3829 | { | |
3830 | xfs_inode_t *ip; | |
67fcaa73 | 3831 | bhv_vnode_t *vp; |
1da177e4 LT |
3832 | |
3833 | vp = BHV_TO_VNODE(bdp); | |
3834 | ip = XFS_BHVTOI(bdp); | |
3835 | ||
3836 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); | |
3837 | ||
3838 | ASSERT(!VN_MAPPED(vp)); | |
3839 | ||
3840 | /* bad inode, get out here ASAP */ | |
3841 | if (VN_BAD(vp)) { | |
3842 | xfs_ireclaim(ip); | |
3843 | return 0; | |
3844 | } | |
3845 | ||
51c91ed5 | 3846 | vn_iowait(vp); |
1da177e4 | 3847 | |
51c91ed5 | 3848 | ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); |
1da177e4 | 3849 | |
42fe2b1f CH |
3850 | /* |
3851 | * Make sure the atime in the XFS inode is correct before freeing the | |
3852 | * Linux inode. | |
3853 | */ | |
3854 | xfs_synchronize_atime(ip); | |
1da177e4 | 3855 | |
4c60658e DC |
3856 | /* |
3857 | * If we have nothing to flush with this inode then complete the | |
3858 | * teardown now, otherwise break the link between the xfs inode and the | |
3859 | * linux inode and clean up the xfs inode later. This avoids flushing | |
3860 | * the inode to disk during the delete operation itself. | |
3861 | * | |
3862 | * When breaking the link, we need to set the XFS_IRECLAIMABLE flag | |
3863 | * first to ensure that xfs_iunpin() will never see an xfs inode | |
3864 | * that has a linux inode being reclaimed. Synchronisation is provided | |
3865 | * by the i_flags_lock. | |
1da177e4 LT |
3866 | */ |
3867 | if (!ip->i_update_core && (ip->i_itemp == NULL)) { | |
3868 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3869 | xfs_iflock(ip); | |
3870 | return xfs_finish_reclaim(ip, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC); | |
3871 | } else { | |
3872 | xfs_mount_t *mp = ip->i_mount; | |
3873 | ||
4c60658e | 3874 | /* Protect sync and unpin from us */ |
1da177e4 | 3875 | XFS_MOUNT_ILOCK(mp); |
4c60658e DC |
3876 | spin_lock(&ip->i_flags_lock); |
3877 | __xfs_iflags_set(ip, XFS_IRECLAIMABLE); | |
1da177e4 | 3878 | vn_bhv_remove(VN_BHV_HEAD(vp), XFS_ITOBHV(ip)); |
4c60658e | 3879 | spin_unlock(&ip->i_flags_lock); |
1da177e4 | 3880 | list_add_tail(&ip->i_reclaim, &mp->m_del_inodes); |
1da177e4 LT |
3881 | XFS_MOUNT_IUNLOCK(mp); |
3882 | } | |
3883 | return 0; | |
3884 | } | |
3885 | ||
3886 | int | |
3887 | xfs_finish_reclaim( | |
3888 | xfs_inode_t *ip, | |
3889 | int locked, | |
3890 | int sync_mode) | |
3891 | { | |
3892 | xfs_ihash_t *ih = ip->i_hash; | |
67fcaa73 | 3893 | bhv_vnode_t *vp = XFS_ITOV_NULL(ip); |
1da177e4 LT |
3894 | int error; |
3895 | ||
3896 | if (vp && VN_BAD(vp)) | |
3897 | goto reclaim; | |
3898 | ||
3899 | /* The hash lock here protects a thread in xfs_iget_core from | |
3900 | * racing with us on linking the inode back with a vnode. | |
3901 | * Once we have the XFS_IRECLAIM flag set it will not touch | |
3902 | * us. | |
3903 | */ | |
3904 | write_lock(&ih->ih_lock); | |
f273ab84 | 3905 | spin_lock(&ip->i_flags_lock); |
7a18c386 DC |
3906 | if (__xfs_iflags_test(ip, XFS_IRECLAIM) || |
3907 | (!__xfs_iflags_test(ip, XFS_IRECLAIMABLE) && vp == NULL)) { | |
f273ab84 | 3908 | spin_unlock(&ip->i_flags_lock); |
1da177e4 LT |
3909 | write_unlock(&ih->ih_lock); |
3910 | if (locked) { | |
3911 | xfs_ifunlock(ip); | |
3912 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3913 | } | |
014c2544 | 3914 | return 1; |
1da177e4 | 3915 | } |
7a18c386 | 3916 | __xfs_iflags_set(ip, XFS_IRECLAIM); |
f273ab84 | 3917 | spin_unlock(&ip->i_flags_lock); |
1da177e4 LT |
3918 | write_unlock(&ih->ih_lock); |
3919 | ||
3920 | /* | |
3921 | * If the inode is still dirty, then flush it out. If the inode | |
3922 | * is not in the AIL, then it will be OK to flush it delwri as | |
3923 | * long as xfs_iflush() does not keep any references to the inode. | |
3924 | * We leave that decision up to xfs_iflush() since it has the | |
3925 | * knowledge of whether it's OK to simply do a delwri flush of | |
3926 | * the inode or whether we need to wait until the inode is | |
3927 | * pulled from the AIL. | |
3928 | * We get the flush lock regardless, though, just to make sure | |
3929 | * we don't free it while it is being flushed. | |
3930 | */ | |
3931 | if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { | |
3932 | if (!locked) { | |
3933 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
3934 | xfs_iflock(ip); | |
3935 | } | |
3936 | ||
3937 | if (ip->i_update_core || | |
3938 | ((ip->i_itemp != NULL) && | |
3939 | (ip->i_itemp->ili_format.ilf_fields != 0))) { | |
3940 | error = xfs_iflush(ip, sync_mode); | |
3941 | /* | |
3942 | * If we hit an error, typically because of filesystem | |
3943 | * shutdown, we don't need to let vn_reclaim to know | |
3944 | * because we're gonna reclaim the inode anyway. | |
3945 | */ | |
3946 | if (error) { | |
3947 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3948 | goto reclaim; | |
3949 | } | |
3950 | xfs_iflock(ip); /* synchronize with xfs_iflush_done */ | |
3951 | } | |
3952 | ||
3953 | ASSERT(ip->i_update_core == 0); | |
3954 | ASSERT(ip->i_itemp == NULL || | |
3955 | ip->i_itemp->ili_format.ilf_fields == 0); | |
3956 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3957 | } else if (locked) { | |
3958 | /* | |
3959 | * We are not interested in doing an iflush if we're | |
3960 | * in the process of shutting down the filesystem forcibly. | |
3961 | * So, just reclaim the inode. | |
3962 | */ | |
3963 | xfs_ifunlock(ip); | |
3964 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3965 | } | |
3966 | ||
3967 | reclaim: | |
3968 | xfs_ireclaim(ip); | |
3969 | return 0; | |
3970 | } | |
3971 | ||
3972 | int | |
3973 | xfs_finish_reclaim_all(xfs_mount_t *mp, int noblock) | |
3974 | { | |
3975 | int purged; | |
3976 | xfs_inode_t *ip, *n; | |
3977 | int done = 0; | |
3978 | ||
3979 | while (!done) { | |
3980 | purged = 0; | |
3981 | XFS_MOUNT_ILOCK(mp); | |
3982 | list_for_each_entry_safe(ip, n, &mp->m_del_inodes, i_reclaim) { | |
3983 | if (noblock) { | |
3984 | if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) | |
3985 | continue; | |
3986 | if (xfs_ipincount(ip) || | |
3987 | !xfs_iflock_nowait(ip)) { | |
3988 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3989 | continue; | |
3990 | } | |
3991 | } | |
3992 | XFS_MOUNT_IUNLOCK(mp); | |
6b2cf618 FB |
3993 | if (xfs_finish_reclaim(ip, noblock, |
3994 | XFS_IFLUSH_DELWRI_ELSE_ASYNC)) | |
3995 | delay(1); | |
1da177e4 LT |
3996 | purged = 1; |
3997 | break; | |
3998 | } | |
3999 | ||
4000 | done = !purged; | |
4001 | } | |
4002 | ||
4003 | XFS_MOUNT_IUNLOCK(mp); | |
4004 | return 0; | |
4005 | } | |
4006 | ||
4007 | /* | |
4008 | * xfs_alloc_file_space() | |
4009 | * This routine allocates disk space for the given file. | |
4010 | * | |
4011 | * If alloc_type == 0, this request is for an ALLOCSP type | |
4012 | * request which will change the file size. In this case, no | |
4013 | * DMAPI event will be generated by the call. A TRUNCATE event | |
4014 | * will be generated later by xfs_setattr. | |
4015 | * | |
4016 | * If alloc_type != 0, this request is for a RESVSP type | |
4017 | * request, and a DMAPI DM_EVENT_WRITE will be generated if the | |
4018 | * lower block boundary byte address is less than the file's | |
4019 | * length. | |
4020 | * | |
4021 | * RETURNS: | |
4022 | * 0 on success | |
4023 | * errno on error | |
4024 | * | |
4025 | */ | |
ba0f32d4 | 4026 | STATIC int |
1da177e4 LT |
4027 | xfs_alloc_file_space( |
4028 | xfs_inode_t *ip, | |
4029 | xfs_off_t offset, | |
4030 | xfs_off_t len, | |
4031 | int alloc_type, | |
4032 | int attr_flags) | |
4033 | { | |
dd9f438e NS |
4034 | xfs_mount_t *mp = ip->i_mount; |
4035 | xfs_off_t count; | |
1da177e4 LT |
4036 | xfs_filblks_t allocated_fsb; |
4037 | xfs_filblks_t allocatesize_fsb; | |
dd9f438e NS |
4038 | xfs_extlen_t extsz, temp; |
4039 | xfs_fileoff_t startoffset_fsb; | |
1da177e4 | 4040 | xfs_fsblock_t firstfsb; |
dd9f438e NS |
4041 | int nimaps; |
4042 | int bmapi_flag; | |
4043 | int quota_flag; | |
1da177e4 | 4044 | int rt; |
1da177e4 | 4045 | xfs_trans_t *tp; |
dd9f438e NS |
4046 | xfs_bmbt_irec_t imaps[1], *imapp; |
4047 | xfs_bmap_free_t free_list; | |
4048 | uint qblocks, resblks, resrtextents; | |
4049 | int committed; | |
4050 | int error; | |
1da177e4 LT |
4051 | |
4052 | vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address); | |
1da177e4 LT |
4053 | |
4054 | if (XFS_FORCED_SHUTDOWN(mp)) | |
4055 | return XFS_ERROR(EIO); | |
4056 | ||
1da177e4 LT |
4057 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
4058 | return error; | |
4059 | ||
4060 | if (len <= 0) | |
4061 | return XFS_ERROR(EINVAL); | |
4062 | ||
957d0ebe DC |
4063 | rt = XFS_IS_REALTIME_INODE(ip); |
4064 | extsz = xfs_get_extsz_hint(ip); | |
4065 | ||
1da177e4 | 4066 | count = len; |
1da177e4 | 4067 | imapp = &imaps[0]; |
dd9f438e NS |
4068 | nimaps = 1; |
4069 | bmapi_flag = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0); | |
1da177e4 LT |
4070 | startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
4071 | allocatesize_fsb = XFS_B_TO_FSB(mp, count); | |
4072 | ||
4073 | /* Generate a DMAPI event if needed. */ | |
ba87ea69 | 4074 | if (alloc_type != 0 && offset < ip->i_size && |
1da177e4 LT |
4075 | (attr_flags&ATTR_DMI) == 0 && |
4076 | DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) { | |
4077 | xfs_off_t end_dmi_offset; | |
4078 | ||
4079 | end_dmi_offset = offset+len; | |
ba87ea69 LM |
4080 | if (end_dmi_offset > ip->i_size) |
4081 | end_dmi_offset = ip->i_size; | |
1da177e4 LT |
4082 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, XFS_ITOV(ip), |
4083 | offset, end_dmi_offset - offset, | |
4084 | 0, NULL); | |
4085 | if (error) | |
014c2544 | 4086 | return error; |
1da177e4 LT |
4087 | } |
4088 | ||
4089 | /* | |
dd9f438e | 4090 | * Allocate file space until done or until there is an error |
1da177e4 LT |
4091 | */ |
4092 | retry: | |
4093 | while (allocatesize_fsb && !error) { | |
dd9f438e NS |
4094 | xfs_fileoff_t s, e; |
4095 | ||
1da177e4 | 4096 | /* |
3ddb8fa9 | 4097 | * Determine space reservations for data/realtime. |
1da177e4 | 4098 | */ |
dd9f438e | 4099 | if (unlikely(extsz)) { |
1da177e4 | 4100 | s = startoffset_fsb; |
dd9f438e NS |
4101 | do_div(s, extsz); |
4102 | s *= extsz; | |
4103 | e = startoffset_fsb + allocatesize_fsb; | |
4104 | if ((temp = do_mod(startoffset_fsb, extsz))) | |
4105 | e += temp; | |
4106 | if ((temp = do_mod(e, extsz))) | |
4107 | e += extsz - temp; | |
4108 | } else { | |
4109 | s = 0; | |
4110 | e = allocatesize_fsb; | |
4111 | } | |
4112 | ||
4113 | if (unlikely(rt)) { | |
4114 | resrtextents = qblocks = (uint)(e - s); | |
4115 | resrtextents /= mp->m_sb.sb_rextsize; | |
4116 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
4117 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
1da177e4 | 4118 | } else { |
dd9f438e NS |
4119 | resrtextents = 0; |
4120 | resblks = qblocks = \ | |
4121 | XFS_DIOSTRAT_SPACE_RES(mp, (uint)(e - s)); | |
4122 | quota_flag = XFS_QMOPT_RES_REGBLKS; | |
1da177e4 LT |
4123 | } |
4124 | ||
4125 | /* | |
dd9f438e | 4126 | * Allocate and setup the transaction. |
1da177e4 LT |
4127 | */ |
4128 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
dd9f438e NS |
4129 | error = xfs_trans_reserve(tp, resblks, |
4130 | XFS_WRITE_LOG_RES(mp), resrtextents, | |
1da177e4 LT |
4131 | XFS_TRANS_PERM_LOG_RES, |
4132 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 4133 | /* |
dd9f438e | 4134 | * Check for running out of space |
1da177e4 LT |
4135 | */ |
4136 | if (error) { | |
4137 | /* | |
4138 | * Free the transaction structure. | |
4139 | */ | |
4140 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
4141 | xfs_trans_cancel(tp, 0); | |
4142 | break; | |
4143 | } | |
4144 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
dd9f438e NS |
4145 | error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, |
4146 | qblocks, 0, quota_flag); | |
1da177e4 LT |
4147 | if (error) |
4148 | goto error1; | |
4149 | ||
4150 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
4151 | xfs_trans_ihold(tp, ip); | |
4152 | ||
4153 | /* | |
dd9f438e | 4154 | * Issue the xfs_bmapi() call to allocate the blocks |
1da177e4 LT |
4155 | */ |
4156 | XFS_BMAP_INIT(&free_list, &firstfsb); | |
3e57ecf6 | 4157 | error = XFS_BMAPI(mp, tp, &ip->i_iocore, startoffset_fsb, |
dd9f438e NS |
4158 | allocatesize_fsb, bmapi_flag, |
4159 | &firstfsb, 0, imapp, &nimaps, | |
3e57ecf6 | 4160 | &free_list, NULL); |
1da177e4 LT |
4161 | if (error) { |
4162 | goto error0; | |
4163 | } | |
4164 | ||
4165 | /* | |
dd9f438e | 4166 | * Complete the transaction |
1da177e4 | 4167 | */ |
f7c99b6f | 4168 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
4169 | if (error) { |
4170 | goto error0; | |
4171 | } | |
4172 | ||
1c72bf90 | 4173 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
4174 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
4175 | if (error) { | |
4176 | break; | |
4177 | } | |
4178 | ||
4179 | allocated_fsb = imapp->br_blockcount; | |
4180 | ||
dd9f438e | 4181 | if (nimaps == 0) { |
1da177e4 LT |
4182 | error = XFS_ERROR(ENOSPC); |
4183 | break; | |
4184 | } | |
4185 | ||
4186 | startoffset_fsb += allocated_fsb; | |
4187 | allocatesize_fsb -= allocated_fsb; | |
4188 | } | |
4189 | dmapi_enospc_check: | |
4190 | if (error == ENOSPC && (attr_flags&ATTR_DMI) == 0 && | |
4191 | DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_NOSPACE)) { | |
4192 | ||
4193 | error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE, | |
4194 | XFS_ITOV(ip), DM_RIGHT_NULL, | |
4195 | XFS_ITOV(ip), DM_RIGHT_NULL, | |
4196 | NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */ | |
4197 | if (error == 0) | |
4198 | goto retry; /* Maybe DMAPI app. has made space */ | |
4199 | /* else fall through with error from XFS_SEND_DATA */ | |
4200 | } | |
4201 | ||
4202 | return error; | |
4203 | ||
dd9f438e | 4204 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 4205 | xfs_bmap_cancel(&free_list); |
dd9f438e NS |
4206 | XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, qblocks, 0, quota_flag); |
4207 | ||
4208 | error1: /* Just cancel transaction */ | |
1da177e4 LT |
4209 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
4210 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
4211 | goto dmapi_enospc_check; | |
4212 | } | |
4213 | ||
4214 | /* | |
4215 | * Zero file bytes between startoff and endoff inclusive. | |
4216 | * The iolock is held exclusive and no blocks are buffered. | |
4217 | */ | |
4218 | STATIC int | |
4219 | xfs_zero_remaining_bytes( | |
4220 | xfs_inode_t *ip, | |
4221 | xfs_off_t startoff, | |
4222 | xfs_off_t endoff) | |
4223 | { | |
4224 | xfs_bmbt_irec_t imap; | |
4225 | xfs_fileoff_t offset_fsb; | |
4226 | xfs_off_t lastoffset; | |
4227 | xfs_off_t offset; | |
4228 | xfs_buf_t *bp; | |
4229 | xfs_mount_t *mp = ip->i_mount; | |
4230 | int nimap; | |
4231 | int error = 0; | |
4232 | ||
4233 | bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize, | |
4234 | ip->i_d.di_flags & XFS_DIFLAG_REALTIME ? | |
4235 | mp->m_rtdev_targp : mp->m_ddev_targp); | |
4236 | ||
4237 | for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { | |
4238 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
4239 | nimap = 1; | |
3e57ecf6 OW |
4240 | error = XFS_BMAPI(mp, NULL, &ip->i_iocore, offset_fsb, 1, 0, |
4241 | NULL, 0, &imap, &nimap, NULL, NULL); | |
1da177e4 LT |
4242 | if (error || nimap < 1) |
4243 | break; | |
4244 | ASSERT(imap.br_blockcount >= 1); | |
4245 | ASSERT(imap.br_startoff == offset_fsb); | |
4246 | lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; | |
4247 | if (lastoffset > endoff) | |
4248 | lastoffset = endoff; | |
4249 | if (imap.br_startblock == HOLESTARTBLOCK) | |
4250 | continue; | |
4251 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
4252 | if (imap.br_state == XFS_EXT_UNWRITTEN) | |
4253 | continue; | |
4254 | XFS_BUF_UNDONE(bp); | |
4255 | XFS_BUF_UNWRITE(bp); | |
4256 | XFS_BUF_READ(bp); | |
4257 | XFS_BUF_SET_ADDR(bp, XFS_FSB_TO_DB(ip, imap.br_startblock)); | |
4258 | xfsbdstrat(mp, bp); | |
4259 | if ((error = xfs_iowait(bp))) { | |
4260 | xfs_ioerror_alert("xfs_zero_remaining_bytes(read)", | |
4261 | mp, bp, XFS_BUF_ADDR(bp)); | |
4262 | break; | |
4263 | } | |
4264 | memset(XFS_BUF_PTR(bp) + | |
4265 | (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), | |
4266 | 0, lastoffset - offset + 1); | |
4267 | XFS_BUF_UNDONE(bp); | |
4268 | XFS_BUF_UNREAD(bp); | |
4269 | XFS_BUF_WRITE(bp); | |
4270 | xfsbdstrat(mp, bp); | |
4271 | if ((error = xfs_iowait(bp))) { | |
4272 | xfs_ioerror_alert("xfs_zero_remaining_bytes(write)", | |
4273 | mp, bp, XFS_BUF_ADDR(bp)); | |
4274 | break; | |
4275 | } | |
4276 | } | |
4277 | xfs_buf_free(bp); | |
4278 | return error; | |
4279 | } | |
4280 | ||
4281 | /* | |
4282 | * xfs_free_file_space() | |
4283 | * This routine frees disk space for the given file. | |
4284 | * | |
4285 | * This routine is only called by xfs_change_file_space | |
4286 | * for an UNRESVSP type call. | |
4287 | * | |
4288 | * RETURNS: | |
4289 | * 0 on success | |
4290 | * errno on error | |
4291 | * | |
4292 | */ | |
4293 | STATIC int | |
4294 | xfs_free_file_space( | |
4295 | xfs_inode_t *ip, | |
4296 | xfs_off_t offset, | |
4297 | xfs_off_t len, | |
4298 | int attr_flags) | |
4299 | { | |
67fcaa73 | 4300 | bhv_vnode_t *vp; |
1da177e4 LT |
4301 | int committed; |
4302 | int done; | |
4303 | xfs_off_t end_dmi_offset; | |
4304 | xfs_fileoff_t endoffset_fsb; | |
4305 | int error; | |
4306 | xfs_fsblock_t firstfsb; | |
4307 | xfs_bmap_free_t free_list; | |
1da177e4 LT |
4308 | xfs_bmbt_irec_t imap; |
4309 | xfs_off_t ioffset; | |
4310 | xfs_extlen_t mod=0; | |
4311 | xfs_mount_t *mp; | |
4312 | int nimap; | |
4313 | uint resblks; | |
673cdf5c | 4314 | uint rounding; |
1da177e4 LT |
4315 | int rt; |
4316 | xfs_fileoff_t startoffset_fsb; | |
4317 | xfs_trans_t *tp; | |
5fcbab35 | 4318 | int need_iolock = 1; |
1da177e4 | 4319 | |
bd5a876a | 4320 | vp = XFS_ITOV(ip); |
1da177e4 LT |
4321 | mp = ip->i_mount; |
4322 | ||
bd5a876a CH |
4323 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
4324 | ||
1da177e4 LT |
4325 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
4326 | return error; | |
4327 | ||
4328 | error = 0; | |
4329 | if (len <= 0) /* if nothing being freed */ | |
4330 | return error; | |
4331 | rt = (ip->i_d.di_flags & XFS_DIFLAG_REALTIME); | |
4332 | startoffset_fsb = XFS_B_TO_FSB(mp, offset); | |
4333 | end_dmi_offset = offset + len; | |
4334 | endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset); | |
4335 | ||
ba87ea69 | 4336 | if (offset < ip->i_size && |
1da177e4 LT |
4337 | (attr_flags & ATTR_DMI) == 0 && |
4338 | DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) { | |
ba87ea69 LM |
4339 | if (end_dmi_offset > ip->i_size) |
4340 | end_dmi_offset = ip->i_size; | |
bd5a876a | 4341 | error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, vp, |
1da177e4 LT |
4342 | offset, end_dmi_offset - offset, |
4343 | AT_DELAY_FLAG(attr_flags), NULL); | |
4344 | if (error) | |
014c2544 | 4345 | return error; |
1da177e4 LT |
4346 | } |
4347 | ||
5fcbab35 DR |
4348 | if (attr_flags & ATTR_NOLOCK) |
4349 | need_iolock = 0; | |
9fa8046f | 4350 | if (need_iolock) { |
1da177e4 | 4351 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
9fa8046f YL |
4352 | vn_iowait(vp); /* wait for the completion of any pending DIOs */ |
4353 | } | |
5fcbab35 | 4354 | |
673cdf5c | 4355 | rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, NBPP); |
1da177e4 | 4356 | ioffset = offset & ~(rounding - 1); |
bd5a876a CH |
4357 | |
4358 | if (VN_CACHED(vp) != 0) { | |
4359 | xfs_inval_cached_trace(&ip->i_iocore, ioffset, -1, | |
4360 | ctooff(offtoct(ioffset)), -1); | |
d3cf2094 | 4361 | error = bhv_vop_flushinval_pages(vp, ctooff(offtoct(ioffset)), |
bd5a876a | 4362 | -1, FI_REMAPF_LOCKED); |
d3cf2094 LM |
4363 | if (error) |
4364 | goto out_unlock_iolock; | |
bd5a876a CH |
4365 | } |
4366 | ||
1da177e4 LT |
4367 | /* |
4368 | * Need to zero the stuff we're not freeing, on disk. | |
4369 | * If its a realtime file & can't use unwritten extents then we | |
4370 | * actually need to zero the extent edges. Otherwise xfs_bunmapi | |
4371 | * will take care of it for us. | |
4372 | */ | |
4373 | if (rt && !XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) { | |
4374 | nimap = 1; | |
3e57ecf6 OW |
4375 | error = XFS_BMAPI(mp, NULL, &ip->i_iocore, startoffset_fsb, |
4376 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); | |
1da177e4 LT |
4377 | if (error) |
4378 | goto out_unlock_iolock; | |
4379 | ASSERT(nimap == 0 || nimap == 1); | |
4380 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
4381 | xfs_daddr_t block; | |
4382 | ||
4383 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
4384 | block = imap.br_startblock; | |
4385 | mod = do_div(block, mp->m_sb.sb_rextsize); | |
4386 | if (mod) | |
4387 | startoffset_fsb += mp->m_sb.sb_rextsize - mod; | |
4388 | } | |
4389 | nimap = 1; | |
3e57ecf6 OW |
4390 | error = XFS_BMAPI(mp, NULL, &ip->i_iocore, endoffset_fsb - 1, |
4391 | 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); | |
1da177e4 LT |
4392 | if (error) |
4393 | goto out_unlock_iolock; | |
4394 | ASSERT(nimap == 0 || nimap == 1); | |
4395 | if (nimap && imap.br_startblock != HOLESTARTBLOCK) { | |
4396 | ASSERT(imap.br_startblock != DELAYSTARTBLOCK); | |
4397 | mod++; | |
4398 | if (mod && (mod != mp->m_sb.sb_rextsize)) | |
4399 | endoffset_fsb -= mod; | |
4400 | } | |
4401 | } | |
4402 | if ((done = (endoffset_fsb <= startoffset_fsb))) | |
4403 | /* | |
4404 | * One contiguous piece to clear | |
4405 | */ | |
4406 | error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); | |
4407 | else { | |
4408 | /* | |
4409 | * Some full blocks, possibly two pieces to clear | |
4410 | */ | |
4411 | if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) | |
4412 | error = xfs_zero_remaining_bytes(ip, offset, | |
4413 | XFS_FSB_TO_B(mp, startoffset_fsb) - 1); | |
4414 | if (!error && | |
4415 | XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) | |
4416 | error = xfs_zero_remaining_bytes(ip, | |
4417 | XFS_FSB_TO_B(mp, endoffset_fsb), | |
4418 | offset + len - 1); | |
4419 | } | |
4420 | ||
4421 | /* | |
4422 | * free file space until done or until there is an error | |
4423 | */ | |
4424 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
4425 | while (!error && !done) { | |
4426 | ||
4427 | /* | |
4428 | * allocate and setup the transaction | |
4429 | */ | |
4430 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
4431 | error = xfs_trans_reserve(tp, | |
4432 | resblks, | |
4433 | XFS_WRITE_LOG_RES(mp), | |
4434 | 0, | |
4435 | XFS_TRANS_PERM_LOG_RES, | |
4436 | XFS_WRITE_LOG_COUNT); | |
4437 | ||
4438 | /* | |
4439 | * check for running out of space | |
4440 | */ | |
4441 | if (error) { | |
4442 | /* | |
4443 | * Free the transaction structure. | |
4444 | */ | |
4445 | ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); | |
4446 | xfs_trans_cancel(tp, 0); | |
4447 | break; | |
4448 | } | |
4449 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
4450 | error = XFS_TRANS_RESERVE_QUOTA(mp, tp, | |
dd9f438e NS |
4451 | ip->i_udquot, ip->i_gdquot, resblks, 0, |
4452 | XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
4453 | if (error) |
4454 | goto error1; | |
4455 | ||
4456 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
4457 | xfs_trans_ihold(tp, ip); | |
4458 | ||
4459 | /* | |
4460 | * issue the bunmapi() call to free the blocks | |
4461 | */ | |
4462 | XFS_BMAP_INIT(&free_list, &firstfsb); | |
3e57ecf6 | 4463 | error = XFS_BUNMAPI(mp, tp, &ip->i_iocore, startoffset_fsb, |
1da177e4 | 4464 | endoffset_fsb - startoffset_fsb, |
3e57ecf6 | 4465 | 0, 2, &firstfsb, &free_list, NULL, &done); |
1da177e4 LT |
4466 | if (error) { |
4467 | goto error0; | |
4468 | } | |
4469 | ||
4470 | /* | |
4471 | * complete the transaction | |
4472 | */ | |
f7c99b6f | 4473 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
4474 | if (error) { |
4475 | goto error0; | |
4476 | } | |
4477 | ||
1c72bf90 | 4478 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
4479 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
4480 | } | |
4481 | ||
4482 | out_unlock_iolock: | |
4483 | if (need_iolock) | |
4484 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
4485 | return error; | |
4486 | ||
4487 | error0: | |
4488 | xfs_bmap_cancel(&free_list); | |
4489 | error1: | |
4490 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
4491 | xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : | |
4492 | XFS_ILOCK_EXCL); | |
4493 | return error; | |
4494 | } | |
4495 | ||
4496 | /* | |
4497 | * xfs_change_file_space() | |
4498 | * This routine allocates or frees disk space for the given file. | |
4499 | * The user specified parameters are checked for alignment and size | |
4500 | * limitations. | |
4501 | * | |
4502 | * RETURNS: | |
4503 | * 0 on success | |
4504 | * errno on error | |
4505 | * | |
4506 | */ | |
4507 | int | |
4508 | xfs_change_file_space( | |
4509 | bhv_desc_t *bdp, | |
4510 | int cmd, | |
4511 | xfs_flock64_t *bf, | |
4512 | xfs_off_t offset, | |
4513 | cred_t *credp, | |
4514 | int attr_flags) | |
4515 | { | |
4516 | int clrprealloc; | |
4517 | int error; | |
4518 | xfs_fsize_t fsize; | |
4519 | xfs_inode_t *ip; | |
4520 | xfs_mount_t *mp; | |
4521 | int setprealloc; | |
4522 | xfs_off_t startoffset; | |
4523 | xfs_off_t llen; | |
4524 | xfs_trans_t *tp; | |
8285fb58 | 4525 | bhv_vattr_t va; |
67fcaa73 | 4526 | bhv_vnode_t *vp; |
1da177e4 LT |
4527 | |
4528 | vp = BHV_TO_VNODE(bdp); | |
4529 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); | |
4530 | ||
4531 | ip = XFS_BHVTOI(bdp); | |
4532 | mp = ip->i_mount; | |
4533 | ||
4534 | /* | |
4535 | * must be a regular file and have write permission | |
4536 | */ | |
0432dab2 | 4537 | if (!VN_ISREG(vp)) |
1da177e4 LT |
4538 | return XFS_ERROR(EINVAL); |
4539 | ||
4540 | xfs_ilock(ip, XFS_ILOCK_SHARED); | |
4541 | ||
4542 | if ((error = xfs_iaccess(ip, S_IWUSR, credp))) { | |
4543 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
4544 | return error; | |
4545 | } | |
4546 | ||
4547 | xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
4548 | ||
4549 | switch (bf->l_whence) { | |
4550 | case 0: /*SEEK_SET*/ | |
4551 | break; | |
4552 | case 1: /*SEEK_CUR*/ | |
4553 | bf->l_start += offset; | |
4554 | break; | |
4555 | case 2: /*SEEK_END*/ | |
ba87ea69 | 4556 | bf->l_start += ip->i_size; |
1da177e4 LT |
4557 | break; |
4558 | default: | |
4559 | return XFS_ERROR(EINVAL); | |
4560 | } | |
4561 | ||
4562 | llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; | |
4563 | ||
4564 | if ( (bf->l_start < 0) | |
4565 | || (bf->l_start > XFS_MAXIOFFSET(mp)) | |
4566 | || (bf->l_start + llen < 0) | |
4567 | || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) | |
4568 | return XFS_ERROR(EINVAL); | |
4569 | ||
4570 | bf->l_whence = 0; | |
4571 | ||
4572 | startoffset = bf->l_start; | |
ba87ea69 | 4573 | fsize = ip->i_size; |
1da177e4 LT |
4574 | |
4575 | /* | |
4576 | * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve | |
4577 | * file space. | |
4578 | * These calls do NOT zero the data space allocated to the file, | |
4579 | * nor do they change the file size. | |
4580 | * | |
4581 | * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file | |
4582 | * space. | |
4583 | * These calls cause the new file data to be zeroed and the file | |
4584 | * size to be changed. | |
4585 | */ | |
4586 | setprealloc = clrprealloc = 0; | |
4587 | ||
4588 | switch (cmd) { | |
4589 | case XFS_IOC_RESVSP: | |
4590 | case XFS_IOC_RESVSP64: | |
4591 | error = xfs_alloc_file_space(ip, startoffset, bf->l_len, | |
4592 | 1, attr_flags); | |
4593 | if (error) | |
4594 | return error; | |
4595 | setprealloc = 1; | |
4596 | break; | |
4597 | ||
4598 | case XFS_IOC_UNRESVSP: | |
4599 | case XFS_IOC_UNRESVSP64: | |
4600 | if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, | |
4601 | attr_flags))) | |
4602 | return error; | |
4603 | break; | |
4604 | ||
4605 | case XFS_IOC_ALLOCSP: | |
4606 | case XFS_IOC_ALLOCSP64: | |
4607 | case XFS_IOC_FREESP: | |
4608 | case XFS_IOC_FREESP64: | |
4609 | if (startoffset > fsize) { | |
4610 | error = xfs_alloc_file_space(ip, fsize, | |
4611 | startoffset - fsize, 0, attr_flags); | |
4612 | if (error) | |
4613 | break; | |
4614 | } | |
4615 | ||
4616 | va.va_mask = XFS_AT_SIZE; | |
4617 | va.va_size = startoffset; | |
4618 | ||
4619 | error = xfs_setattr(bdp, &va, attr_flags, credp); | |
4620 | ||
4621 | if (error) | |
4622 | return error; | |
4623 | ||
4624 | clrprealloc = 1; | |
4625 | break; | |
4626 | ||
4627 | default: | |
4628 | ASSERT(0); | |
4629 | return XFS_ERROR(EINVAL); | |
4630 | } | |
4631 | ||
4632 | /* | |
4633 | * update the inode timestamp, mode, and prealloc flag bits | |
4634 | */ | |
4635 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
4636 | ||
4637 | if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), | |
4638 | 0, 0, 0))) { | |
4639 | /* ASSERT(0); */ | |
4640 | xfs_trans_cancel(tp, 0); | |
4641 | return error; | |
4642 | } | |
4643 | ||
4644 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
4645 | ||
4646 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
4647 | xfs_trans_ihold(tp, ip); | |
4648 | ||
4649 | if ((attr_flags & ATTR_DMI) == 0) { | |
4650 | ip->i_d.di_mode &= ~S_ISUID; | |
4651 | ||
4652 | /* | |
4653 | * Note that we don't have to worry about mandatory | |
4654 | * file locking being disabled here because we only | |
4655 | * clear the S_ISGID bit if the Group execute bit is | |
4656 | * on, but if it was on then mandatory locking wouldn't | |
4657 | * have been enabled. | |
4658 | */ | |
4659 | if (ip->i_d.di_mode & S_IXGRP) | |
4660 | ip->i_d.di_mode &= ~S_ISGID; | |
4661 | ||
4662 | xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); | |
4663 | } | |
4664 | if (setprealloc) | |
4665 | ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; | |
4666 | else if (clrprealloc) | |
4667 | ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; | |
4668 | ||
4669 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
4670 | xfs_trans_set_sync(tp); | |
4671 | ||
1c72bf90 | 4672 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
4673 | |
4674 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
4675 | ||
4676 | return error; | |
4677 | } | |
4678 | ||
67fcaa73 | 4679 | bhv_vnodeops_t xfs_vnodeops = { |
1da177e4 LT |
4680 | BHV_IDENTITY_INIT(VN_BHV_XFS,VNODE_POSITION_XFS), |
4681 | .vop_open = xfs_open, | |
7d4fb40a | 4682 | .vop_close = xfs_close, |
1da177e4 | 4683 | .vop_read = xfs_read, |
1b895840 NS |
4684 | #ifdef HAVE_SPLICE |
4685 | .vop_splice_read = xfs_splice_read, | |
4686 | .vop_splice_write = xfs_splice_write, | |
1da177e4 LT |
4687 | #endif |
4688 | .vop_write = xfs_write, | |
4689 | .vop_ioctl = xfs_ioctl, | |
4690 | .vop_getattr = xfs_getattr, | |
4691 | .vop_setattr = xfs_setattr, | |
4692 | .vop_access = xfs_access, | |
4693 | .vop_lookup = xfs_lookup, | |
4694 | .vop_create = xfs_create, | |
4695 | .vop_remove = xfs_remove, | |
4696 | .vop_link = xfs_link, | |
4697 | .vop_rename = xfs_rename, | |
4698 | .vop_mkdir = xfs_mkdir, | |
4699 | .vop_rmdir = xfs_rmdir, | |
4700 | .vop_readdir = xfs_readdir, | |
4701 | .vop_symlink = xfs_symlink, | |
4702 | .vop_readlink = xfs_readlink, | |
4703 | .vop_fsync = xfs_fsync, | |
4704 | .vop_inactive = xfs_inactive, | |
4705 | .vop_fid2 = xfs_fid2, | |
4706 | .vop_rwlock = xfs_rwlock, | |
4707 | .vop_rwunlock = xfs_rwunlock, | |
4708 | .vop_bmap = xfs_bmap, | |
4709 | .vop_reclaim = xfs_reclaim, | |
4710 | .vop_attr_get = xfs_attr_get, | |
4711 | .vop_attr_set = xfs_attr_set, | |
4712 | .vop_attr_remove = xfs_attr_remove, | |
4713 | .vop_attr_list = xfs_attr_list, | |
4714 | .vop_link_removed = (vop_link_removed_t)fs_noval, | |
4715 | .vop_vnode_change = (vop_vnode_change_t)fs_noval, | |
4716 | .vop_tosspages = fs_tosspages, | |
4717 | .vop_flushinval_pages = fs_flushinval_pages, | |
4718 | .vop_flush_pages = fs_flush_pages, | |
4719 | .vop_release = xfs_release, | |
4720 | .vop_iflush = xfs_inode_flush, | |
4721 | }; |