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 | ||
1da177e4 LT |
156 | /* |
157 | * Prints out an ALERT message about I/O error. | |
158 | */ | |
159 | void | |
160 | xfs_ioerror_alert( | |
161 | char *func, | |
162 | struct xfs_mount *mp, | |
163 | xfs_buf_t *bp, | |
164 | xfs_daddr_t blkno) | |
165 | { | |
166 | cmn_err(CE_ALERT, | |
167 | "I/O error in filesystem (\"%s\") meta-data dev %s block 0x%llx" | |
da1650a5 | 168 | " (\"%s\") error %d buf count %zd", |
1da177e4 | 169 | (!mp || !mp->m_fsname) ? "(fs name not set)" : mp->m_fsname, |
ce8e922c NS |
170 | XFS_BUFTARG_NAME(XFS_BUF_TARGET(bp)), |
171 | (__uint64_t)blkno, func, | |
172 | XFS_BUF_GETERROR(bp), XFS_BUF_COUNT(bp)); | |
1da177e4 LT |
173 | } |
174 | ||
175 | /* | |
176 | * This isn't an absolute requirement, but it is | |
177 | * just a good idea to call xfs_read_buf instead of | |
178 | * directly doing a read_buf call. For one, we shouldn't | |
179 | * be doing this disk read if we are in SHUTDOWN state anyway, | |
180 | * so this stops that from happening. Secondly, this does all | |
181 | * the error checking stuff and the brelse if appropriate for | |
182 | * the caller, so the code can be a little leaner. | |
183 | */ | |
184 | ||
185 | int | |
186 | xfs_read_buf( | |
187 | struct xfs_mount *mp, | |
188 | xfs_buftarg_t *target, | |
189 | xfs_daddr_t blkno, | |
190 | int len, | |
191 | uint flags, | |
192 | xfs_buf_t **bpp) | |
193 | { | |
194 | xfs_buf_t *bp; | |
195 | int error; | |
196 | ||
6ad112bf CH |
197 | if (!flags) |
198 | flags = XBF_LOCK | XBF_MAPPED; | |
199 | ||
200 | bp = xfs_buf_read(target, blkno, len, flags); | |
1da177e4 LT |
201 | if (!bp) |
202 | return XFS_ERROR(EIO); | |
203 | error = XFS_BUF_GETERROR(bp); | |
204 | if (bp && !error && !XFS_FORCED_SHUTDOWN(mp)) { | |
205 | *bpp = bp; | |
206 | } else { | |
207 | *bpp = NULL; | |
208 | if (error) { | |
209 | xfs_ioerror_alert("xfs_read_buf", mp, bp, XFS_BUF_ADDR(bp)); | |
210 | } else { | |
211 | error = XFS_ERROR(EIO); | |
212 | } | |
213 | if (bp) { | |
214 | XFS_BUF_UNDONE(bp); | |
215 | XFS_BUF_UNDELAYWRITE(bp); | |
216 | XFS_BUF_STALE(bp); | |
217 | /* | |
218 | * brelse clears B_ERROR and b_error | |
219 | */ | |
220 | xfs_buf_relse(bp); | |
221 | } | |
222 | } | |
223 | return (error); | |
224 | } | |
225 | ||
5683f53e CH |
226 | /* |
227 | * helper function to extract extent size hint from inode | |
228 | */ | |
229 | xfs_extlen_t | |
230 | xfs_get_extsz_hint( | |
231 | struct xfs_inode *ip) | |
232 | { | |
233 | xfs_extlen_t extsz; | |
234 | ||
235 | if (unlikely(XFS_IS_REALTIME_INODE(ip))) { | |
236 | extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) | |
237 | ? ip->i_d.di_extsize | |
238 | : ip->i_mount->m_sb.sb_rextsize; | |
239 | ASSERT(extsz); | |
240 | } else { | |
241 | extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) | |
242 | ? ip->i_d.di_extsize : 0; | |
243 | } | |
244 | ||
245 | return extsz; | |
246 | } |