Commit | Line | Data |
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1da177e4 | 1 | /* |
1e69dd0e | 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 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 LT |
27 | #include "xfs_dir2.h" |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_mount.h" | |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
a844f451 | 31 | #include "xfs_alloc_btree.h" |
1da177e4 | 32 | #include "xfs_ialloc_btree.h" |
a844f451 NS |
33 | #include "xfs_dir2_sf.h" |
34 | #include "xfs_attr_sf.h" | |
35 | #include "xfs_dinode.h" | |
36 | #include "xfs_inode.h" | |
37 | #include "xfs_inode_item.h" | |
1da177e4 LT |
38 | #include "xfs_itable.h" |
39 | #include "xfs_btree.h" | |
40 | #include "xfs_alloc.h" | |
41 | #include "xfs_ialloc.h" | |
42 | #include "xfs_attr.h" | |
1da177e4 | 43 | #include "xfs_bmap.h" |
1da177e4 LT |
44 | #include "xfs_error.h" |
45 | #include "xfs_buf_item.h" | |
46 | #include "xfs_rw.h" | |
0b1b213f | 47 | #include "xfs_trace.h" |
1da177e4 LT |
48 | |
49 | /* | |
50 | * This is a subroutine for xfs_write() and other writers (xfs_ioctl) | |
51 | * which clears the setuid and setgid bits when a file is written. | |
52 | */ | |
53 | int | |
54 | xfs_write_clear_setuid( | |
55 | xfs_inode_t *ip) | |
56 | { | |
57 | xfs_mount_t *mp; | |
58 | xfs_trans_t *tp; | |
59 | int error; | |
60 | ||
61 | mp = ip->i_mount; | |
62 | tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); | |
63 | if ((error = xfs_trans_reserve(tp, 0, | |
64 | XFS_WRITEID_LOG_RES(mp), | |
65 | 0, 0, 0))) { | |
66 | xfs_trans_cancel(tp, 0); | |
67 | return error; | |
68 | } | |
69 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
70 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
71 | xfs_trans_ihold(tp, ip); | |
72 | ip->i_d.di_mode &= ~S_ISUID; | |
73 | ||
74 | /* | |
75 | * Note that we don't have to worry about mandatory | |
76 | * file locking being disabled here because we only | |
77 | * clear the S_ISGID bit if the Group execute bit is | |
78 | * on, but if it was on then mandatory locking wouldn't | |
79 | * have been enabled. | |
80 | */ | |
81 | if (ip->i_d.di_mode & S_IXGRP) { | |
82 | ip->i_d.di_mode &= ~S_ISGID; | |
83 | } | |
84 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
85 | xfs_trans_set_sync(tp); | |
1c72bf90 | 86 | error = xfs_trans_commit(tp, 0); |
1da177e4 LT |
87 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
88 | return 0; | |
89 | } | |
90 | ||
91 | /* | |
92 | * Force a shutdown of the filesystem instantly while keeping | |
93 | * the filesystem consistent. We don't do an unmount here; just shutdown | |
94 | * the shop, make sure that absolutely nothing persistent happens to | |
95 | * this filesystem after this point. | |
96 | */ | |
1da177e4 LT |
97 | void |
98 | xfs_do_force_shutdown( | |
48c872a9 | 99 | xfs_mount_t *mp, |
1da177e4 LT |
100 | int flags, |
101 | char *fname, | |
102 | int lnnum) | |
103 | { | |
104 | int logerror; | |
1da177e4 | 105 | |
7d04a335 | 106 | logerror = flags & SHUTDOWN_LOG_IO_ERROR; |
1da177e4 | 107 | |
7d04a335 NS |
108 | if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { |
109 | cmn_err(CE_NOTE, "xfs_force_shutdown(%s,0x%x) called from " | |
110 | "line %d of file %s. Return address = 0x%p", | |
111 | mp->m_fsname, flags, lnnum, fname, __return_address); | |
1da177e4 LT |
112 | } |
113 | /* | |
114 | * No need to duplicate efforts. | |
115 | */ | |
116 | if (XFS_FORCED_SHUTDOWN(mp) && !logerror) | |
117 | return; | |
118 | ||
119 | /* | |
120 | * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't | |
121 | * queue up anybody new on the log reservations, and wakes up | |
7d04a335 NS |
122 | * everybody who's sleeping on log reservations to tell them |
123 | * the bad news. | |
1da177e4 LT |
124 | */ |
125 | if (xfs_log_force_umount(mp, logerror)) | |
126 | return; | |
127 | ||
7d04a335 | 128 | if (flags & SHUTDOWN_CORRUPT_INCORE) { |
1da177e4 LT |
129 | xfs_cmn_err(XFS_PTAG_SHUTDOWN_CORRUPT, CE_ALERT, mp, |
130 | "Corruption of in-memory data detected. Shutting down filesystem: %s", | |
131 | mp->m_fsname); | |
132 | if (XFS_ERRLEVEL_HIGH <= xfs_error_level) { | |
133 | xfs_stack_trace(); | |
134 | } | |
7d04a335 | 135 | } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { |
1da177e4 LT |
136 | if (logerror) { |
137 | xfs_cmn_err(XFS_PTAG_SHUTDOWN_LOGERROR, CE_ALERT, mp, | |
7d04a335 | 138 | "Log I/O Error Detected. Shutting down filesystem: %s", |
1da177e4 | 139 | mp->m_fsname); |
7d04a335 | 140 | } else if (flags & SHUTDOWN_DEVICE_REQ) { |
1da177e4 | 141 | xfs_cmn_err(XFS_PTAG_SHUTDOWN_IOERROR, CE_ALERT, mp, |
7d04a335 NS |
142 | "All device paths lost. Shutting down filesystem: %s", |
143 | mp->m_fsname); | |
144 | } else if (!(flags & SHUTDOWN_REMOTE_REQ)) { | |
145 | xfs_cmn_err(XFS_PTAG_SHUTDOWN_IOERROR, CE_ALERT, mp, | |
146 | "I/O Error Detected. Shutting down filesystem: %s", | |
1da177e4 LT |
147 | mp->m_fsname); |
148 | } | |
149 | } | |
7d04a335 NS |
150 | if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { |
151 | cmn_err(CE_ALERT, "Please umount the filesystem, " | |
152 | "and rectify the problem(s)"); | |
1da177e4 LT |
153 | } |
154 | } | |
155 | ||
156 | ||
157 | /* | |
158 | * Called when we want to stop a buffer from getting written or read. | |
159 | * We attach the EIO error, muck with its flags, and call biodone | |
160 | * so that the proper iodone callbacks get called. | |
161 | */ | |
162 | int | |
163 | xfs_bioerror( | |
164 | xfs_buf_t *bp) | |
165 | { | |
166 | ||
167 | #ifdef XFSERRORDEBUG | |
168 | ASSERT(XFS_BUF_ISREAD(bp) || bp->b_iodone); | |
169 | #endif | |
170 | ||
171 | /* | |
172 | * No need to wait until the buffer is unpinned. | |
173 | * We aren't flushing it. | |
174 | */ | |
1da177e4 LT |
175 | XFS_BUF_ERROR(bp, EIO); |
176 | /* | |
177 | * We're calling biodone, so delete B_DONE flag. Either way | |
178 | * we have to call the iodone callback, and calling biodone | |
179 | * probably is the best way since it takes care of | |
180 | * GRIO as well. | |
181 | */ | |
182 | XFS_BUF_UNREAD(bp); | |
183 | XFS_BUF_UNDELAYWRITE(bp); | |
184 | XFS_BUF_UNDONE(bp); | |
185 | XFS_BUF_STALE(bp); | |
186 | ||
187 | XFS_BUF_CLR_BDSTRAT_FUNC(bp); | |
188 | xfs_biodone(bp); | |
189 | ||
190 | return (EIO); | |
191 | } | |
192 | ||
193 | /* | |
194 | * Same as xfs_bioerror, except that we are releasing the buffer | |
195 | * here ourselves, and avoiding the biodone call. | |
196 | * This is meant for userdata errors; metadata bufs come with | |
197 | * iodone functions attached, so that we can track down errors. | |
198 | */ | |
199 | int | |
200 | xfs_bioerror_relse( | |
201 | xfs_buf_t *bp) | |
202 | { | |
203 | int64_t fl; | |
204 | ||
205 | ASSERT(XFS_BUF_IODONE_FUNC(bp) != xfs_buf_iodone_callbacks); | |
206 | ASSERT(XFS_BUF_IODONE_FUNC(bp) != xlog_iodone); | |
207 | ||
1da177e4 LT |
208 | fl = XFS_BUF_BFLAGS(bp); |
209 | /* | |
210 | * No need to wait until the buffer is unpinned. | |
211 | * We aren't flushing it. | |
212 | * | |
213 | * chunkhold expects B_DONE to be set, whether | |
214 | * we actually finish the I/O or not. We don't want to | |
215 | * change that interface. | |
216 | */ | |
217 | XFS_BUF_UNREAD(bp); | |
218 | XFS_BUF_UNDELAYWRITE(bp); | |
219 | XFS_BUF_DONE(bp); | |
220 | XFS_BUF_STALE(bp); | |
221 | XFS_BUF_CLR_IODONE_FUNC(bp); | |
222 | XFS_BUF_CLR_BDSTRAT_FUNC(bp); | |
223 | if (!(fl & XFS_B_ASYNC)) { | |
224 | /* | |
225 | * Mark b_error and B_ERROR _both_. | |
226 | * Lot's of chunkcache code assumes that. | |
227 | * There's no reason to mark error for | |
228 | * ASYNC buffers. | |
229 | */ | |
230 | XFS_BUF_ERROR(bp, EIO); | |
b4dd330b | 231 | XFS_BUF_FINISH_IOWAIT(bp); |
1da177e4 LT |
232 | } else { |
233 | xfs_buf_relse(bp); | |
234 | } | |
235 | return (EIO); | |
236 | } | |
ce8e922c | 237 | |
1da177e4 LT |
238 | /* |
239 | * Prints out an ALERT message about I/O error. | |
240 | */ | |
241 | void | |
242 | xfs_ioerror_alert( | |
243 | char *func, | |
244 | struct xfs_mount *mp, | |
245 | xfs_buf_t *bp, | |
246 | xfs_daddr_t blkno) | |
247 | { | |
248 | cmn_err(CE_ALERT, | |
249 | "I/O error in filesystem (\"%s\") meta-data dev %s block 0x%llx" | |
da1650a5 | 250 | " (\"%s\") error %d buf count %zd", |
1da177e4 | 251 | (!mp || !mp->m_fsname) ? "(fs name not set)" : mp->m_fsname, |
ce8e922c NS |
252 | XFS_BUFTARG_NAME(XFS_BUF_TARGET(bp)), |
253 | (__uint64_t)blkno, func, | |
254 | XFS_BUF_GETERROR(bp), XFS_BUF_COUNT(bp)); | |
1da177e4 LT |
255 | } |
256 | ||
257 | /* | |
258 | * This isn't an absolute requirement, but it is | |
259 | * just a good idea to call xfs_read_buf instead of | |
260 | * directly doing a read_buf call. For one, we shouldn't | |
261 | * be doing this disk read if we are in SHUTDOWN state anyway, | |
262 | * so this stops that from happening. Secondly, this does all | |
263 | * the error checking stuff and the brelse if appropriate for | |
264 | * the caller, so the code can be a little leaner. | |
265 | */ | |
266 | ||
267 | int | |
268 | xfs_read_buf( | |
269 | struct xfs_mount *mp, | |
270 | xfs_buftarg_t *target, | |
271 | xfs_daddr_t blkno, | |
272 | int len, | |
273 | uint flags, | |
274 | xfs_buf_t **bpp) | |
275 | { | |
276 | xfs_buf_t *bp; | |
277 | int error; | |
278 | ||
6ad112bf CH |
279 | if (!flags) |
280 | flags = XBF_LOCK | XBF_MAPPED; | |
281 | ||
282 | bp = xfs_buf_read(target, blkno, len, flags); | |
1da177e4 LT |
283 | if (!bp) |
284 | return XFS_ERROR(EIO); | |
285 | error = XFS_BUF_GETERROR(bp); | |
286 | if (bp && !error && !XFS_FORCED_SHUTDOWN(mp)) { | |
287 | *bpp = bp; | |
288 | } else { | |
289 | *bpp = NULL; | |
290 | if (error) { | |
291 | xfs_ioerror_alert("xfs_read_buf", mp, bp, XFS_BUF_ADDR(bp)); | |
292 | } else { | |
293 | error = XFS_ERROR(EIO); | |
294 | } | |
295 | if (bp) { | |
296 | XFS_BUF_UNDONE(bp); | |
297 | XFS_BUF_UNDELAYWRITE(bp); | |
298 | XFS_BUF_STALE(bp); | |
299 | /* | |
300 | * brelse clears B_ERROR and b_error | |
301 | */ | |
302 | xfs_buf_relse(bp); | |
303 | } | |
304 | } | |
305 | return (error); | |
306 | } | |
307 | ||
308 | /* | |
309 | * Wrapper around bwrite() so that we can trap | |
310 | * write errors, and act accordingly. | |
311 | */ | |
312 | int | |
313 | xfs_bwrite( | |
314 | struct xfs_mount *mp, | |
315 | struct xfs_buf *bp) | |
316 | { | |
317 | int error; | |
318 | ||
319 | /* | |
320 | * XXXsup how does this work for quotas. | |
321 | */ | |
322 | XFS_BUF_SET_BDSTRAT_FUNC(bp, xfs_bdstrat_cb); | |
15ac08a8 | 323 | bp->b_mount = mp; |
1da177e4 LT |
324 | XFS_BUF_WRITE(bp); |
325 | ||
326 | if ((error = XFS_bwrite(bp))) { | |
327 | ASSERT(mp); | |
328 | /* | |
329 | * Cannot put a buftrace here since if the buffer is not | |
330 | * B_HOLD then we will brelse() the buffer before returning | |
331 | * from bwrite and we could be tracing a buffer that has | |
332 | * been reused. | |
333 | */ | |
7d04a335 | 334 | xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
1da177e4 LT |
335 | } |
336 | return (error); | |
337 | } | |
5683f53e CH |
338 | |
339 | /* | |
340 | * helper function to extract extent size hint from inode | |
341 | */ | |
342 | xfs_extlen_t | |
343 | xfs_get_extsz_hint( | |
344 | struct xfs_inode *ip) | |
345 | { | |
346 | xfs_extlen_t extsz; | |
347 | ||
348 | if (unlikely(XFS_IS_REALTIME_INODE(ip))) { | |
349 | extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) | |
350 | ? ip->i_d.di_extsize | |
351 | : ip->i_mount->m_sb.sb_rextsize; | |
352 | ASSERT(extsz); | |
353 | } else { | |
354 | extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) | |
355 | ? ip->i_d.di_extsize : 0; | |
356 | } | |
357 | ||
358 | return extsz; | |
359 | } |