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 */ 40void 41xfs_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 cmn_err(CE_NOTE, "xfs_force_shutdown(%s,0x%x) called from " 53 "line %d of file %s. Return address = 0x%p", 54 mp->m_fsname, 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_cmn_err(XFS_PTAG_SHUTDOWN_CORRUPT, CE_ALERT, mp, 73 "Corruption of in-memory data detected. Shutting down filesystem: %s", 74 mp->m_fsname); 75 if (XFS_ERRLEVEL_HIGH <= xfs_error_level) { 76 xfs_stack_trace(); 77 } 78 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 79 if (logerror) { 80 xfs_cmn_err(XFS_PTAG_SHUTDOWN_LOGERROR, CE_ALERT, mp, 81 "Log I/O Error Detected. Shutting down filesystem: %s", 82 mp->m_fsname); 83 } else if (flags & SHUTDOWN_DEVICE_REQ) { 84 xfs_cmn_err(XFS_PTAG_SHUTDOWN_IOERROR, CE_ALERT, mp, 85 "All device paths lost. Shutting down filesystem: %s", 86 mp->m_fsname); 87 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) { 88 xfs_cmn_err(XFS_PTAG_SHUTDOWN_IOERROR, CE_ALERT, mp, 89 "I/O Error Detected. Shutting down filesystem: %s", 90 mp->m_fsname); 91 } 92 } 93 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) { 94 cmn_err(CE_ALERT, "Please umount the filesystem, " 95 "and rectify the problem(s)"); 96 } 97} 98 99/* 100 * Prints out an ALERT message about I/O error. 101 */ 102void 103xfs_ioerror_alert( 104 char *func, 105 struct xfs_mount *mp, 106 xfs_buf_t *bp, 107 xfs_daddr_t blkno) 108{ 109 cmn_err(CE_ALERT, 110 "I/O error in filesystem (\"%s\") meta-data dev %s block 0x%llx" 111 " (\"%s\") error %d buf count %zd", 112 (!mp || !mp->m_fsname) ? "(fs name not set)" : mp->m_fsname, 113 XFS_BUFTARG_NAME(XFS_BUF_TARGET(bp)), 114 (__uint64_t)blkno, func, 115 XFS_BUF_GETERROR(bp), XFS_BUF_COUNT(bp)); 116} 117 118/* 119 * This isn't an absolute requirement, but it is 120 * just a good idea to call xfs_read_buf instead of 121 * directly doing a read_buf call. For one, we shouldn't 122 * be doing this disk read if we are in SHUTDOWN state anyway, 123 * so this stops that from happening. Secondly, this does all 124 * the error checking stuff and the brelse if appropriate for 125 * the caller, so the code can be a little leaner. 126 */ 127 128int 129xfs_read_buf( 130 struct xfs_mount *mp, 131 xfs_buftarg_t *target, 132 xfs_daddr_t blkno, 133 int len, 134 uint flags, 135 xfs_buf_t **bpp) 136{ 137 xfs_buf_t *bp; 138 int error; 139 140 if (!flags) 141 flags = XBF_LOCK | XBF_MAPPED; 142 143 bp = xfs_buf_read(target, blkno, len, flags); 144 if (!bp) 145 return XFS_ERROR(EIO); 146 error = XFS_BUF_GETERROR(bp); 147 if (bp && !error && !XFS_FORCED_SHUTDOWN(mp)) { 148 *bpp = bp; 149 } else { 150 *bpp = NULL; 151 if (error) { 152 xfs_ioerror_alert("xfs_read_buf", mp, bp, XFS_BUF_ADDR(bp)); 153 } else { 154 error = XFS_ERROR(EIO); 155 } 156 if (bp) { 157 XFS_BUF_UNDONE(bp); 158 XFS_BUF_UNDELAYWRITE(bp); 159 XFS_BUF_STALE(bp); 160 /* 161 * brelse clears B_ERROR and b_error 162 */ 163 xfs_buf_relse(bp); 164 } 165 } 166 return (error); 167} 168 169/* 170 * helper function to extract extent size hint from inode 171 */ 172xfs_extlen_t 173xfs_get_extsz_hint( 174 struct xfs_inode *ip) 175{ 176 xfs_extlen_t extsz; 177 178 if (unlikely(XFS_IS_REALTIME_INODE(ip))) { 179 extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) 180 ? ip->i_d.di_extsize 181 : ip->i_mount->m_sb.sb_rextsize; 182 ASSERT(extsz); 183 } else { 184 extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) 185 ? ip->i_d.di_extsize : 0; 186 } 187 188 return extsz; 189} 190