2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
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
7 * published by the Free Software Foundation.
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.
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
20 #include "xfs_types.h"
24 #include "xfs_trans.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
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"
38 #include "xfs_itable.h"
39 #include "xfs_btree.h"
40 #include "xfs_alloc.h"
41 #include "xfs_ialloc.h"
44 #include "xfs_error.h"
45 #include "xfs_buf_item.h"
49 * This is a subroutine for xfs_write() and other writers (xfs_ioctl)
50 * which clears the setuid and setgid bits when a file is written.
53 xfs_write_clear_setuid(
61 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
62 if ((error = xfs_trans_reserve(tp, 0,
63 XFS_WRITEID_LOG_RES(mp),
65 xfs_trans_cancel(tp, 0);
68 xfs_ilock(ip, XFS_ILOCK_EXCL);
69 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
70 xfs_trans_ihold(tp, ip);
71 ip->i_d.di_mode &= ~S_ISUID;
74 * Note that we don't have to worry about mandatory
75 * file locking being disabled here because we only
76 * clear the S_ISGID bit if the Group execute bit is
77 * on, but if it was on then mandatory locking wouldn't
80 if (ip->i_d.di_mode & S_IXGRP) {
81 ip->i_d.di_mode &= ~S_ISGID;
83 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
84 xfs_trans_set_sync(tp);
85 error = xfs_trans_commit(tp, 0);
86 xfs_iunlock(ip, XFS_ILOCK_EXCL);
91 * Force a shutdown of the filesystem instantly while keeping
92 * the filesystem consistent. We don't do an unmount here; just shutdown
93 * the shop, make sure that absolutely nothing persistent happens to
94 * this filesystem after this point.
97 xfs_do_force_shutdown(
105 logerror = flags & SHUTDOWN_LOG_IO_ERROR;
107 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
108 cmn_err(CE_NOTE, "xfs_force_shutdown(%s,0x%x) called from "
109 "line %d of file %s. Return address = 0x%p",
110 mp->m_fsname, flags, lnnum, fname, __return_address);
113 * No need to duplicate efforts.
115 if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
119 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't
120 * queue up anybody new on the log reservations, and wakes up
121 * everybody who's sleeping on log reservations to tell them
124 if (xfs_log_force_umount(mp, logerror))
127 if (flags & SHUTDOWN_CORRUPT_INCORE) {
128 xfs_cmn_err(XFS_PTAG_SHUTDOWN_CORRUPT, CE_ALERT, mp,
129 "Corruption of in-memory data detected. Shutting down filesystem: %s",
131 if (XFS_ERRLEVEL_HIGH <= xfs_error_level) {
134 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
136 xfs_cmn_err(XFS_PTAG_SHUTDOWN_LOGERROR, CE_ALERT, mp,
137 "Log I/O Error Detected. Shutting down filesystem: %s",
139 } else if (flags & SHUTDOWN_DEVICE_REQ) {
140 xfs_cmn_err(XFS_PTAG_SHUTDOWN_IOERROR, CE_ALERT, mp,
141 "All device paths lost. Shutting down filesystem: %s",
143 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) {
144 xfs_cmn_err(XFS_PTAG_SHUTDOWN_IOERROR, CE_ALERT, mp,
145 "I/O Error Detected. Shutting down filesystem: %s",
149 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
150 cmn_err(CE_ALERT, "Please umount the filesystem, "
151 "and rectify the problem(s)");
157 * Called when we want to stop a buffer from getting written or read.
158 * We attach the EIO error, muck with its flags, and call biodone
159 * so that the proper iodone callbacks get called.
167 ASSERT(XFS_BUF_ISREAD(bp) || bp->b_iodone);
171 * No need to wait until the buffer is unpinned.
172 * We aren't flushing it.
174 xfs_buftrace("XFS IOERROR", bp);
175 XFS_BUF_ERROR(bp, EIO);
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
183 XFS_BUF_UNDELAYWRITE(bp);
187 XFS_BUF_CLR_BDSTRAT_FUNC(bp);
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.
205 ASSERT(XFS_BUF_IODONE_FUNC(bp) != xfs_buf_iodone_callbacks);
206 ASSERT(XFS_BUF_IODONE_FUNC(bp) != xlog_iodone);
208 xfs_buftrace("XFS IOERRELSE", bp);
209 fl = XFS_BUF_BFLAGS(bp);
211 * No need to wait until the buffer is unpinned.
212 * We aren't flushing it.
214 * chunkhold expects B_DONE to be set, whether
215 * we actually finish the I/O or not. We don't want to
216 * change that interface.
219 XFS_BUF_UNDELAYWRITE(bp);
222 XFS_BUF_CLR_IODONE_FUNC(bp);
223 XFS_BUF_CLR_BDSTRAT_FUNC(bp);
224 if (!(fl & XFS_B_ASYNC)) {
226 * Mark b_error and B_ERROR _both_.
227 * Lot's of chunkcache code assumes that.
228 * There's no reason to mark error for
231 XFS_BUF_ERROR(bp, EIO);
232 XFS_BUF_FINISH_IOWAIT(bp);
240 * Prints out an ALERT message about I/O error.
245 struct xfs_mount *mp,
250 "I/O error in filesystem (\"%s\") meta-data dev %s block 0x%llx"
251 " (\"%s\") error %d buf count %zd",
252 (!mp || !mp->m_fsname) ? "(fs name not set)" : mp->m_fsname,
253 XFS_BUFTARG_NAME(XFS_BUF_TARGET(bp)),
254 (__uint64_t)blkno, func,
255 XFS_BUF_GETERROR(bp), XFS_BUF_COUNT(bp));
259 * This isn't an absolute requirement, but it is
260 * just a good idea to call xfs_read_buf instead of
261 * directly doing a read_buf call. For one, we shouldn't
262 * be doing this disk read if we are in SHUTDOWN state anyway,
263 * so this stops that from happening. Secondly, this does all
264 * the error checking stuff and the brelse if appropriate for
265 * the caller, so the code can be a little leaner.
270 struct xfs_mount *mp,
271 xfs_buftarg_t *target,
281 flags = XBF_LOCK | XBF_MAPPED;
283 bp = xfs_buf_read(target, blkno, len, flags);
285 return XFS_ERROR(EIO);
286 error = XFS_BUF_GETERROR(bp);
287 if (bp && !error && !XFS_FORCED_SHUTDOWN(mp)) {
292 xfs_ioerror_alert("xfs_read_buf", mp, bp, XFS_BUF_ADDR(bp));
294 error = XFS_ERROR(EIO);
298 XFS_BUF_UNDELAYWRITE(bp);
301 * brelse clears B_ERROR and b_error
310 * Wrapper around bwrite() so that we can trap
311 * write errors, and act accordingly.
315 struct xfs_mount *mp,
321 * XXXsup how does this work for quotas.
323 XFS_BUF_SET_BDSTRAT_FUNC(bp, xfs_bdstrat_cb);
327 if ((error = XFS_bwrite(bp))) {
330 * Cannot put a buftrace here since if the buffer is not
331 * B_HOLD then we will brelse() the buffer before returning
332 * from bwrite and we could be tracing a buffer that has
335 xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR);
341 * helper function to extract extent size hint from inode
345 struct xfs_inode *ip)
349 if (unlikely(XFS_IS_REALTIME_INODE(ip))) {
350 extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
352 : ip->i_mount->m_sb.sb_rextsize;
355 extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
356 ? ip->i_d.di_extsize : 0;