1 /*
2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_types.h"
21 #include "xfs_bit.h"
22 #include "xfs_log.h"
23 #include "xfs_inum.h"
24 #include "xfs_trans.h"
25 #include "xfs_sb.h"
26 #include "xfs_ag.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_dinode.h"
30 #include "xfs_inode.h"
31 #include "xfs_error.h"
32 #include "xfs_rw.h"
33
34 /*
35 * Force a shutdown of the filesystem instantly while keeping
36 * the filesystem consistent. We don't do an unmount here; just shutdown
37 * the shop, make sure that absolutely nothing persistent happens to
38 * this filesystem after this point.
39 */
40 void
xfs_do_force_shutdown(xfs_mount_t * mp,int flags,char * fname,int lnnum)41 xfs_do_force_shutdown(
42 xfs_mount_t *mp,
43 int flags,
44 char *fname,
45 int lnnum)
46 {
47 int logerror;
48
49 logerror = flags & SHUTDOWN_LOG_IO_ERROR;
50
51 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
52 xfs_notice(mp,
53 "%s(0x%x) called from line %d of file %s. Return address = 0x%p",
54 __func__, flags, lnnum, fname, __return_address);
55 }
56 /*
57 * No need to duplicate efforts.
58 */
59 if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
60 return;
61
62 /*
63 * This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't
64 * queue up anybody new on the log reservations, and wakes up
65 * everybody who's sleeping on log reservations to tell them
66 * the bad news.
67 */
68 if (xfs_log_force_umount(mp, logerror))
69 return;
70
71 if (flags & SHUTDOWN_CORRUPT_INCORE) {
72 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT,
73 "Corruption of in-memory data detected. Shutting down filesystem");
74 if (XFS_ERRLEVEL_HIGH <= xfs_error_level)
75 xfs_stack_trace();
76 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
77 if (logerror) {
78 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR,
79 "Log I/O Error Detected. Shutting down filesystem");
80 } else if (flags & SHUTDOWN_DEVICE_REQ) {
81 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
82 "All device paths lost. Shutting down filesystem");
83 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) {
84 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
85 "I/O Error Detected. Shutting down filesystem");
86 }
87 }
88 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
89 xfs_alert(mp,
90 "Please umount the filesystem and rectify the problem(s)");
91 }
92 }
93
94 /*
95 * This isn't an absolute requirement, but it is
96 * just a good idea to call xfs_read_buf instead of
97 * directly doing a read_buf call. For one, we shouldn't
98 * be doing this disk read if we are in SHUTDOWN state anyway,
99 * so this stops that from happening. Secondly, this does all
100 * the error checking stuff and the brelse if appropriate for
101 * the caller, so the code can be a little leaner.
102 */
103
104 int
xfs_read_buf(struct xfs_mount * mp,xfs_buftarg_t * target,xfs_daddr_t blkno,int len,uint flags,xfs_buf_t ** bpp)105 xfs_read_buf(
106 struct xfs_mount *mp,
107 xfs_buftarg_t *target,
108 xfs_daddr_t blkno,
109 int len,
110 uint flags,
111 xfs_buf_t **bpp)
112 {
113 xfs_buf_t *bp;
114 int error;
115
116 if (!flags)
117 flags = XBF_LOCK | XBF_MAPPED;
118
119 bp = xfs_buf_read(target, blkno, len, flags);
120 if (!bp)
121 return XFS_ERROR(EIO);
122 error = bp->b_error;
123 if (!error && !XFS_FORCED_SHUTDOWN(mp)) {
124 *bpp = bp;
125 } else {
126 *bpp = NULL;
127 if (error) {
128 xfs_buf_ioerror_alert(bp, __func__);
129 } else {
130 error = XFS_ERROR(EIO);
131 }
132 if (bp) {
133 XFS_BUF_UNDONE(bp);
134 xfs_buf_stale(bp);
135 /*
136 * brelse clears B_ERROR and b_error
137 */
138 xfs_buf_relse(bp);
139 }
140 }
141 return (error);
142 }
143
144 /*
145 * helper function to extract extent size hint from inode
146 */
147 xfs_extlen_t
xfs_get_extsz_hint(struct xfs_inode * ip)148 xfs_get_extsz_hint(
149 struct xfs_inode *ip)
150 {
151 if ((ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) && ip->i_d.di_extsize)
152 return ip->i_d.di_extsize;
153 if (XFS_IS_REALTIME_INODE(ip))
154 return ip->i_mount->m_sb.sb_rextsize;
155 return 0;
156 }
157