177 строки
4.7 KiB
C
177 строки
4.7 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_types.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_error.h"
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#include "xfs_rw.h"
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/*
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* Force a shutdown of the filesystem instantly while keeping
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* the filesystem consistent. We don't do an unmount here; just shutdown
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* the shop, make sure that absolutely nothing persistent happens to
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* this filesystem after this point.
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*/
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void
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xfs_do_force_shutdown(
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xfs_mount_t *mp,
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int flags,
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char *fname,
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int lnnum)
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{
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int logerror;
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logerror = flags & SHUTDOWN_LOG_IO_ERROR;
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if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
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cmn_err(CE_NOTE, "xfs_force_shutdown(%s,0x%x) called from "
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"line %d of file %s. Return address = 0x%p",
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mp->m_fsname, flags, lnnum, fname, __return_address);
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}
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/*
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* No need to duplicate efforts.
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*/
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if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
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return;
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/*
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* This flags XFS_MOUNT_FS_SHUTDOWN, makes sure that we don't
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* queue up anybody new on the log reservations, and wakes up
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* everybody who's sleeping on log reservations to tell them
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* the bad news.
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*/
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if (xfs_log_force_umount(mp, logerror))
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return;
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if (flags & SHUTDOWN_CORRUPT_INCORE) {
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xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT,
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"Corruption of in-memory data detected. Shutting down filesystem");
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if (XFS_ERRLEVEL_HIGH <= xfs_error_level)
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xfs_stack_trace();
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} else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
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if (logerror) {
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xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR,
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"Log I/O Error Detected. Shutting down filesystem");
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} else if (flags & SHUTDOWN_DEVICE_REQ) {
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xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
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"All device paths lost. Shutting down filesystem");
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} else if (!(flags & SHUTDOWN_REMOTE_REQ)) {
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xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
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"I/O Error Detected. Shutting down filesystem");
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}
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}
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if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
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cmn_err(CE_ALERT, "Please umount the filesystem, "
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"and rectify the problem(s)");
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}
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}
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/*
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* Prints out an ALERT message about I/O error.
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*/
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void
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xfs_ioerror_alert(
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char *func,
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struct xfs_mount *mp,
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xfs_buf_t *bp,
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xfs_daddr_t blkno)
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{
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cmn_err(CE_ALERT,
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"I/O error in filesystem (\"%s\") meta-data dev %s block 0x%llx"
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" (\"%s\") error %d buf count %zd",
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(!mp || !mp->m_fsname) ? "(fs name not set)" : mp->m_fsname,
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XFS_BUFTARG_NAME(XFS_BUF_TARGET(bp)),
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(__uint64_t)blkno, func,
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XFS_BUF_GETERROR(bp), XFS_BUF_COUNT(bp));
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}
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/*
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* This isn't an absolute requirement, but it is
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* just a good idea to call xfs_read_buf instead of
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* directly doing a read_buf call. For one, we shouldn't
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* be doing this disk read if we are in SHUTDOWN state anyway,
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* so this stops that from happening. Secondly, this does all
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* the error checking stuff and the brelse if appropriate for
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* the caller, so the code can be a little leaner.
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*/
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int
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xfs_read_buf(
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struct xfs_mount *mp,
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xfs_buftarg_t *target,
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xfs_daddr_t blkno,
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int len,
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uint flags,
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xfs_buf_t **bpp)
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{
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xfs_buf_t *bp;
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int error;
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if (!flags)
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flags = XBF_LOCK | XBF_MAPPED;
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bp = xfs_buf_read(target, blkno, len, flags);
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if (!bp)
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return XFS_ERROR(EIO);
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error = XFS_BUF_GETERROR(bp);
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if (bp && !error && !XFS_FORCED_SHUTDOWN(mp)) {
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*bpp = bp;
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} else {
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*bpp = NULL;
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if (error) {
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xfs_ioerror_alert("xfs_read_buf", mp, bp, XFS_BUF_ADDR(bp));
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} else {
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error = XFS_ERROR(EIO);
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}
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if (bp) {
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XFS_BUF_UNDONE(bp);
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XFS_BUF_UNDELAYWRITE(bp);
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XFS_BUF_STALE(bp);
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/*
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* brelse clears B_ERROR and b_error
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*/
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xfs_buf_relse(bp);
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}
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}
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return (error);
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}
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/*
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* helper function to extract extent size hint from inode
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*/
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xfs_extlen_t
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xfs_get_extsz_hint(
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struct xfs_inode *ip)
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{
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if ((ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) && ip->i_d.di_extsize)
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return ip->i_d.di_extsize;
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if (XFS_IS_REALTIME_INODE(ip))
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return ip->i_mount->m_sb.sb_rextsize;
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return 0;
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}
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