Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
356
fs/xfs/xfs_rw.c
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356
fs/xfs/xfs_rw.c
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/*
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* Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#include "xfs.h"
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#include "xfs_macros.h"
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#include "xfs_types.h"
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#include "xfs_inum.h"
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#include "xfs_log.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_dir.h"
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#include "xfs_dir2.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_itable.h"
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#include "xfs_btree.h"
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#include "xfs_alloc.h"
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#include "xfs_ialloc.h"
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#include "xfs_attr.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dir_sf.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode_item.h"
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#include "xfs_inode.h"
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#include "xfs_bmap.h"
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#include "xfs_acl.h"
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#include "xfs_mac.h"
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#include "xfs_error.h"
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#include "xfs_buf_item.h"
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#include "xfs_rw.h"
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/*
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* This is a subroutine for xfs_write() and other writers (xfs_ioctl)
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* which clears the setuid and setgid bits when a file is written.
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*/
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int
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xfs_write_clear_setuid(
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xfs_inode_t *ip)
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{
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xfs_mount_t *mp;
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xfs_trans_t *tp;
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int error;
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mp = ip->i_mount;
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tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
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if ((error = xfs_trans_reserve(tp, 0,
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XFS_WRITEID_LOG_RES(mp),
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0, 0, 0))) {
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xfs_trans_cancel(tp, 0);
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return error;
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}
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xfs_ilock(ip, XFS_ILOCK_EXCL);
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xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
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xfs_trans_ihold(tp, ip);
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ip->i_d.di_mode &= ~S_ISUID;
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/*
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* Note that we don't have to worry about mandatory
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* file locking being disabled here because we only
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* clear the S_ISGID bit if the Group execute bit is
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* on, but if it was on then mandatory locking wouldn't
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* have been enabled.
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*/
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if (ip->i_d.di_mode & S_IXGRP) {
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ip->i_d.di_mode &= ~S_ISGID;
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}
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xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
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xfs_trans_set_sync(tp);
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error = xfs_trans_commit(tp, 0, NULL);
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xfs_iunlock(ip, XFS_ILOCK_EXCL);
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return 0;
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}
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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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bhv_desc_t *bdp,
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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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xfs_mount_t *mp;
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mp = XFS_BHVTOM(bdp);
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logerror = flags & XFS_LOG_IO_ERROR;
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if (!(flags & XFS_FORCE_UMOUNT)) {
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cmn_err(CE_NOTE,
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"xfs_force_shutdown(%s,0x%x) called from 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 and tells
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* them 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 & XFS_CORRUPT_INCORE) {
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xfs_cmn_err(XFS_PTAG_SHUTDOWN_CORRUPT, CE_ALERT, mp,
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"Corruption of in-memory data detected. Shutting down filesystem: %s",
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mp->m_fsname);
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if (XFS_ERRLEVEL_HIGH <= xfs_error_level) {
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xfs_stack_trace();
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}
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} else if (!(flags & XFS_FORCE_UMOUNT)) {
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if (logerror) {
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xfs_cmn_err(XFS_PTAG_SHUTDOWN_LOGERROR, CE_ALERT, mp,
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"Log I/O Error Detected. Shutting down filesystem: %s",
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mp->m_fsname);
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} else if (!(flags & XFS_SHUTDOWN_REMOTE_REQ)) {
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xfs_cmn_err(XFS_PTAG_SHUTDOWN_IOERROR, CE_ALERT, mp,
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"I/O Error Detected. Shutting down filesystem: %s",
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mp->m_fsname);
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}
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}
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if (!(flags & XFS_FORCE_UMOUNT)) {
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cmn_err(CE_ALERT,
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"Please umount the filesystem, and rectify the problem(s)");
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}
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}
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/*
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* Called when we want to stop a buffer from getting written or read.
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* We attach the EIO error, muck with its flags, and call biodone
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* so that the proper iodone callbacks get called.
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*/
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int
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xfs_bioerror(
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xfs_buf_t *bp)
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{
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#ifdef XFSERRORDEBUG
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ASSERT(XFS_BUF_ISREAD(bp) || bp->b_iodone);
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#endif
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/*
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* No need to wait until the buffer is unpinned.
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* We aren't flushing it.
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*/
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xfs_buftrace("XFS IOERROR", bp);
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XFS_BUF_ERROR(bp, EIO);
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/*
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* We're calling biodone, so delete B_DONE flag. Either way
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* we have to call the iodone callback, and calling biodone
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* probably is the best way since it takes care of
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* GRIO as well.
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*/
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XFS_BUF_UNREAD(bp);
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XFS_BUF_UNDELAYWRITE(bp);
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XFS_BUF_UNDONE(bp);
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XFS_BUF_STALE(bp);
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XFS_BUF_CLR_BDSTRAT_FUNC(bp);
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xfs_biodone(bp);
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return (EIO);
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}
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/*
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* Same as xfs_bioerror, except that we are releasing the buffer
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* here ourselves, and avoiding the biodone call.
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* This is meant for userdata errors; metadata bufs come with
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* iodone functions attached, so that we can track down errors.
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*/
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int
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xfs_bioerror_relse(
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xfs_buf_t *bp)
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{
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int64_t fl;
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ASSERT(XFS_BUF_IODONE_FUNC(bp) != xfs_buf_iodone_callbacks);
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ASSERT(XFS_BUF_IODONE_FUNC(bp) != xlog_iodone);
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xfs_buftrace("XFS IOERRELSE", bp);
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fl = XFS_BUF_BFLAGS(bp);
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/*
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* No need to wait until the buffer is unpinned.
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* We aren't flushing it.
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*
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* chunkhold expects B_DONE to be set, whether
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* we actually finish the I/O or not. We don't want to
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* change that interface.
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*/
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XFS_BUF_UNREAD(bp);
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XFS_BUF_UNDELAYWRITE(bp);
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XFS_BUF_DONE(bp);
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XFS_BUF_STALE(bp);
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XFS_BUF_CLR_IODONE_FUNC(bp);
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XFS_BUF_CLR_BDSTRAT_FUNC(bp);
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if (!(fl & XFS_B_ASYNC)) {
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/*
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* Mark b_error and B_ERROR _both_.
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* Lot's of chunkcache code assumes that.
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* There's no reason to mark error for
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* ASYNC buffers.
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*/
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XFS_BUF_ERROR(bp, EIO);
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XFS_BUF_V_IODONESEMA(bp);
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} else {
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xfs_buf_relse(bp);
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}
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return (EIO);
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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 %u",
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(!mp || !mp->m_fsname) ? "(fs name not set)" : mp->m_fsname,
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XFS_BUFTARG_NAME(bp->pb_target),
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(__uint64_t)blkno,
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func,
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XFS_BUF_GETERROR(bp),
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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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bp = xfs_buf_read_flags(target, blkno, len, flags);
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else
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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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* Wrapper around bwrite() so that we can trap
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* write errors, and act accordingly.
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*/
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int
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xfs_bwrite(
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struct xfs_mount *mp,
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struct xfs_buf *bp)
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{
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int error;
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/*
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* XXXsup how does this work for quotas.
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*/
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XFS_BUF_SET_BDSTRAT_FUNC(bp, xfs_bdstrat_cb);
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XFS_BUF_SET_FSPRIVATE3(bp, mp);
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XFS_BUF_WRITE(bp);
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if ((error = XFS_bwrite(bp))) {
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ASSERT(mp);
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/*
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* Cannot put a buftrace here since if the buffer is not
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* B_HOLD then we will brelse() the buffer before returning
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* from bwrite and we could be tracing a buffer that has
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* been reused.
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*/
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xfs_force_shutdown(mp, XFS_METADATA_IO_ERROR);
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}
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return (error);
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}
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Reference in New Issue
Block a user