1785 lines
50 KiB
C
1785 lines
50 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 <linux/log2.h>
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_format.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_trans_priv.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_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_buf_item.h"
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#include "xfs_inode_item.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_bmap.h"
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#include "xfs_bmap_util.h"
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#include "xfs_error.h"
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#include "xfs_utils.h"
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#include "xfs_quota.h"
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#include "xfs_filestream.h"
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#include "xfs_vnodeops.h"
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#include "xfs_cksum.h"
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#include "xfs_trace.h"
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#include "xfs_icache.h"
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kmem_zone_t *xfs_inode_zone;
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/*
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* Used in xfs_itruncate_extents(). This is the maximum number of extents
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* freed from a file in a single transaction.
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*/
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#define XFS_ITRUNC_MAX_EXTENTS 2
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STATIC int xfs_iflush_int(xfs_inode_t *, xfs_buf_t *);
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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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/*
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* This is a wrapper routine around the xfs_ilock() routine used to centralize
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* some grungy code. It is used in places that wish to lock the inode solely
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* for reading the extents. The reason these places can't just call
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* xfs_ilock(SHARED) is that the inode lock also guards to bringing in of the
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* extents from disk for a file in b-tree format. If the inode is in b-tree
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* format, then we need to lock the inode exclusively until the extents are read
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* in. Locking it exclusively all the time would limit our parallelism
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* unnecessarily, though. What we do instead is check to see if the extents
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* have been read in yet, and only lock the inode exclusively if they have not.
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*
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* The function returns a value which should be given to the corresponding
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* xfs_iunlock_map_shared(). This value is the mode in which the lock was
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* actually taken.
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*/
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uint
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xfs_ilock_map_shared(
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xfs_inode_t *ip)
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{
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uint lock_mode;
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if ((ip->i_d.di_format == XFS_DINODE_FMT_BTREE) &&
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((ip->i_df.if_flags & XFS_IFEXTENTS) == 0)) {
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lock_mode = XFS_ILOCK_EXCL;
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} else {
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lock_mode = XFS_ILOCK_SHARED;
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}
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xfs_ilock(ip, lock_mode);
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return lock_mode;
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}
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/*
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* This is simply the unlock routine to go with xfs_ilock_map_shared().
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* All it does is call xfs_iunlock() with the given lock_mode.
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*/
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void
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xfs_iunlock_map_shared(
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xfs_inode_t *ip,
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unsigned int lock_mode)
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{
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xfs_iunlock(ip, lock_mode);
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}
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/*
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* The xfs inode contains 2 locks: a multi-reader lock called the
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* i_iolock and a multi-reader lock called the i_lock. This routine
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* allows either or both of the locks to be obtained.
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*
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* The 2 locks should always be ordered so that the IO lock is
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* obtained first in order to prevent deadlock.
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*
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* ip -- the inode being locked
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* lock_flags -- this parameter indicates the inode's locks
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* to be locked. It can be:
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* XFS_IOLOCK_SHARED,
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* XFS_IOLOCK_EXCL,
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* XFS_ILOCK_SHARED,
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* XFS_ILOCK_EXCL,
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* XFS_IOLOCK_SHARED | XFS_ILOCK_SHARED,
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* XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL,
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* XFS_IOLOCK_EXCL | XFS_ILOCK_SHARED,
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* XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL
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*/
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void
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xfs_ilock(
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xfs_inode_t *ip,
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uint lock_flags)
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{
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trace_xfs_ilock(ip, lock_flags, _RET_IP_);
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/*
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* You can't set both SHARED and EXCL for the same lock,
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* and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
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* and XFS_ILOCK_EXCL are valid values to set in lock_flags.
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*/
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ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
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(XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
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ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
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(XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
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ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
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if (lock_flags & XFS_IOLOCK_EXCL)
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mrupdate_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags));
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else if (lock_flags & XFS_IOLOCK_SHARED)
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mraccess_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags));
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if (lock_flags & XFS_ILOCK_EXCL)
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mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags));
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else if (lock_flags & XFS_ILOCK_SHARED)
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mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags));
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}
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/*
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* This is just like xfs_ilock(), except that the caller
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* is guaranteed not to sleep. It returns 1 if it gets
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* the requested locks and 0 otherwise. If the IO lock is
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* obtained but the inode lock cannot be, then the IO lock
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* is dropped before returning.
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*
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* ip -- the inode being locked
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* lock_flags -- this parameter indicates the inode's locks to be
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* to be locked. See the comment for xfs_ilock() for a list
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* of valid values.
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*/
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int
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xfs_ilock_nowait(
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xfs_inode_t *ip,
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uint lock_flags)
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{
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trace_xfs_ilock_nowait(ip, lock_flags, _RET_IP_);
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/*
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* You can't set both SHARED and EXCL for the same lock,
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* and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
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* and XFS_ILOCK_EXCL are valid values to set in lock_flags.
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*/
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ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
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(XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
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ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
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(XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
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ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
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if (lock_flags & XFS_IOLOCK_EXCL) {
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if (!mrtryupdate(&ip->i_iolock))
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goto out;
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} else if (lock_flags & XFS_IOLOCK_SHARED) {
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if (!mrtryaccess(&ip->i_iolock))
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goto out;
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}
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if (lock_flags & XFS_ILOCK_EXCL) {
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if (!mrtryupdate(&ip->i_lock))
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goto out_undo_iolock;
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} else if (lock_flags & XFS_ILOCK_SHARED) {
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if (!mrtryaccess(&ip->i_lock))
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goto out_undo_iolock;
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}
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return 1;
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out_undo_iolock:
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if (lock_flags & XFS_IOLOCK_EXCL)
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mrunlock_excl(&ip->i_iolock);
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else if (lock_flags & XFS_IOLOCK_SHARED)
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mrunlock_shared(&ip->i_iolock);
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out:
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return 0;
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}
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/*
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* xfs_iunlock() is used to drop the inode locks acquired with
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* xfs_ilock() and xfs_ilock_nowait(). The caller must pass
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* in the flags given to xfs_ilock() or xfs_ilock_nowait() so
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* that we know which locks to drop.
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*
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* ip -- the inode being unlocked
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* lock_flags -- this parameter indicates the inode's locks to be
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* to be unlocked. See the comment for xfs_ilock() for a list
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* of valid values for this parameter.
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*
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*/
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void
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xfs_iunlock(
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xfs_inode_t *ip,
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uint lock_flags)
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{
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/*
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* You can't set both SHARED and EXCL for the same lock,
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* and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED,
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* and XFS_ILOCK_EXCL are valid values to set in lock_flags.
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*/
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ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) !=
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(XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
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ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) !=
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(XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
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ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0);
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ASSERT(lock_flags != 0);
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if (lock_flags & XFS_IOLOCK_EXCL)
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mrunlock_excl(&ip->i_iolock);
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else if (lock_flags & XFS_IOLOCK_SHARED)
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mrunlock_shared(&ip->i_iolock);
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if (lock_flags & XFS_ILOCK_EXCL)
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mrunlock_excl(&ip->i_lock);
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else if (lock_flags & XFS_ILOCK_SHARED)
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mrunlock_shared(&ip->i_lock);
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trace_xfs_iunlock(ip, lock_flags, _RET_IP_);
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}
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/*
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* give up write locks. the i/o lock cannot be held nested
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* if it is being demoted.
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*/
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void
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xfs_ilock_demote(
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xfs_inode_t *ip,
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uint lock_flags)
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{
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ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL));
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ASSERT((lock_flags & ~(XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)) == 0);
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if (lock_flags & XFS_ILOCK_EXCL)
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mrdemote(&ip->i_lock);
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if (lock_flags & XFS_IOLOCK_EXCL)
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mrdemote(&ip->i_iolock);
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trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_);
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}
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#if defined(DEBUG) || defined(XFS_WARN)
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int
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xfs_isilocked(
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xfs_inode_t *ip,
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uint lock_flags)
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{
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if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) {
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if (!(lock_flags & XFS_ILOCK_SHARED))
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return !!ip->i_lock.mr_writer;
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return rwsem_is_locked(&ip->i_lock.mr_lock);
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}
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if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) {
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if (!(lock_flags & XFS_IOLOCK_SHARED))
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return !!ip->i_iolock.mr_writer;
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return rwsem_is_locked(&ip->i_iolock.mr_lock);
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}
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ASSERT(0);
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return 0;
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}
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#endif
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void
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__xfs_iflock(
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struct xfs_inode *ip)
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{
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wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT);
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DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT);
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do {
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prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE);
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if (xfs_isiflocked(ip))
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io_schedule();
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} while (!xfs_iflock_nowait(ip));
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finish_wait(wq, &wait.wait);
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}
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STATIC uint
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_xfs_dic2xflags(
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__uint16_t di_flags)
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{
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uint flags = 0;
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if (di_flags & XFS_DIFLAG_ANY) {
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if (di_flags & XFS_DIFLAG_REALTIME)
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flags |= XFS_XFLAG_REALTIME;
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if (di_flags & XFS_DIFLAG_PREALLOC)
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flags |= XFS_XFLAG_PREALLOC;
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if (di_flags & XFS_DIFLAG_IMMUTABLE)
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flags |= XFS_XFLAG_IMMUTABLE;
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if (di_flags & XFS_DIFLAG_APPEND)
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flags |= XFS_XFLAG_APPEND;
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if (di_flags & XFS_DIFLAG_SYNC)
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flags |= XFS_XFLAG_SYNC;
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if (di_flags & XFS_DIFLAG_NOATIME)
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flags |= XFS_XFLAG_NOATIME;
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if (di_flags & XFS_DIFLAG_NODUMP)
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flags |= XFS_XFLAG_NODUMP;
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if (di_flags & XFS_DIFLAG_RTINHERIT)
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flags |= XFS_XFLAG_RTINHERIT;
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if (di_flags & XFS_DIFLAG_PROJINHERIT)
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flags |= XFS_XFLAG_PROJINHERIT;
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if (di_flags & XFS_DIFLAG_NOSYMLINKS)
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flags |= XFS_XFLAG_NOSYMLINKS;
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if (di_flags & XFS_DIFLAG_EXTSIZE)
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flags |= XFS_XFLAG_EXTSIZE;
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if (di_flags & XFS_DIFLAG_EXTSZINHERIT)
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flags |= XFS_XFLAG_EXTSZINHERIT;
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if (di_flags & XFS_DIFLAG_NODEFRAG)
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flags |= XFS_XFLAG_NODEFRAG;
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if (di_flags & XFS_DIFLAG_FILESTREAM)
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flags |= XFS_XFLAG_FILESTREAM;
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}
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return flags;
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}
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uint
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xfs_ip2xflags(
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xfs_inode_t *ip)
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{
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xfs_icdinode_t *dic = &ip->i_d;
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return _xfs_dic2xflags(dic->di_flags) |
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(XFS_IFORK_Q(ip) ? XFS_XFLAG_HASATTR : 0);
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}
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uint
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xfs_dic2xflags(
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xfs_dinode_t *dip)
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{
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return _xfs_dic2xflags(be16_to_cpu(dip->di_flags)) |
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(XFS_DFORK_Q(dip) ? XFS_XFLAG_HASATTR : 0);
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}
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|
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/*
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* Allocate an inode on disk and return a copy of its in-core version.
|
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* The in-core inode is locked exclusively. Set mode, nlink, and rdev
|
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* appropriately within the inode. The uid and gid for the inode are
|
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* set according to the contents of the given cred structure.
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*
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* Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc()
|
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* has a free inode available, call xfs_iget() to obtain the in-core
|
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* version of the allocated inode. Finally, fill in the inode and
|
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* log its initial contents. In this case, ialloc_context would be
|
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* set to NULL.
|
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*
|
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* If xfs_dialloc() does not have an available inode, it will replenish
|
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* its supply by doing an allocation. Since we can only do one
|
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* allocation within a transaction without deadlocks, we must commit
|
|
* the current transaction before returning the inode itself.
|
|
* In this case, therefore, we will set ialloc_context and return.
|
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* The caller should then commit the current transaction, start a new
|
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* transaction, and call xfs_ialloc() again to actually get the inode.
|
|
*
|
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* To ensure that some other process does not grab the inode that
|
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* was allocated during the first call to xfs_ialloc(), this routine
|
|
* also returns the [locked] bp pointing to the head of the freelist
|
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* as ialloc_context. The caller should hold this buffer across
|
|
* the commit and pass it back into this routine on the second call.
|
|
*
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|
* If we are allocating quota inodes, we do not have a parent inode
|
|
* to attach to or associate with (i.e. pip == NULL) because they
|
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* are not linked into the directory structure - they are attached
|
|
* directly to the superblock - and so have no parent.
|
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*/
|
|
int
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xfs_ialloc(
|
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xfs_trans_t *tp,
|
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xfs_inode_t *pip,
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umode_t mode,
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xfs_nlink_t nlink,
|
|
xfs_dev_t rdev,
|
|
prid_t prid,
|
|
int okalloc,
|
|
xfs_buf_t **ialloc_context,
|
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xfs_inode_t **ipp)
|
|
{
|
|
struct xfs_mount *mp = tp->t_mountp;
|
|
xfs_ino_t ino;
|
|
xfs_inode_t *ip;
|
|
uint flags;
|
|
int error;
|
|
timespec_t tv;
|
|
int filestreams = 0;
|
|
|
|
/*
|
|
* Call the space management code to pick
|
|
* the on-disk inode to be allocated.
|
|
*/
|
|
error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc,
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ialloc_context, &ino);
|
|
if (error)
|
|
return error;
|
|
if (*ialloc_context || ino == NULLFSINO) {
|
|
*ipp = NULL;
|
|
return 0;
|
|
}
|
|
ASSERT(*ialloc_context == NULL);
|
|
|
|
/*
|
|
* Get the in-core inode with the lock held exclusively.
|
|
* This is because we're setting fields here we need
|
|
* to prevent others from looking at until we're done.
|
|
*/
|
|
error = xfs_iget(mp, tp, ino, XFS_IGET_CREATE,
|
|
XFS_ILOCK_EXCL, &ip);
|
|
if (error)
|
|
return error;
|
|
ASSERT(ip != NULL);
|
|
|
|
ip->i_d.di_mode = mode;
|
|
ip->i_d.di_onlink = 0;
|
|
ip->i_d.di_nlink = nlink;
|
|
ASSERT(ip->i_d.di_nlink == nlink);
|
|
ip->i_d.di_uid = current_fsuid();
|
|
ip->i_d.di_gid = current_fsgid();
|
|
xfs_set_projid(ip, prid);
|
|
memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
|
|
|
|
/*
|
|
* If the superblock version is up to where we support new format
|
|
* inodes and this is currently an old format inode, then change
|
|
* the inode version number now. This way we only do the conversion
|
|
* here rather than here and in the flush/logging code.
|
|
*/
|
|
if (xfs_sb_version_hasnlink(&mp->m_sb) &&
|
|
ip->i_d.di_version == 1) {
|
|
ip->i_d.di_version = 2;
|
|
/*
|
|
* We've already zeroed the old link count, the projid field,
|
|
* and the pad field.
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* Project ids won't be stored on disk if we are using a version 1 inode.
|
|
*/
|
|
if ((prid != 0) && (ip->i_d.di_version == 1))
|
|
xfs_bump_ino_vers2(tp, ip);
|
|
|
|
if (pip && XFS_INHERIT_GID(pip)) {
|
|
ip->i_d.di_gid = pip->i_d.di_gid;
|
|
if ((pip->i_d.di_mode & S_ISGID) && S_ISDIR(mode)) {
|
|
ip->i_d.di_mode |= S_ISGID;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the group ID of the new file does not match the effective group
|
|
* ID or one of the supplementary group IDs, the S_ISGID bit is cleared
|
|
* (and only if the irix_sgid_inherit compatibility variable is set).
|
|
*/
|
|
if ((irix_sgid_inherit) &&
|
|
(ip->i_d.di_mode & S_ISGID) &&
|
|
(!in_group_p((gid_t)ip->i_d.di_gid))) {
|
|
ip->i_d.di_mode &= ~S_ISGID;
|
|
}
|
|
|
|
ip->i_d.di_size = 0;
|
|
ip->i_d.di_nextents = 0;
|
|
ASSERT(ip->i_d.di_nblocks == 0);
|
|
|
|
nanotime(&tv);
|
|
ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
|
|
ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
|
|
ip->i_d.di_atime = ip->i_d.di_mtime;
|
|
ip->i_d.di_ctime = ip->i_d.di_mtime;
|
|
|
|
/*
|
|
* di_gen will have been taken care of in xfs_iread.
|
|
*/
|
|
ip->i_d.di_extsize = 0;
|
|
ip->i_d.di_dmevmask = 0;
|
|
ip->i_d.di_dmstate = 0;
|
|
ip->i_d.di_flags = 0;
|
|
|
|
if (ip->i_d.di_version == 3) {
|
|
ASSERT(ip->i_d.di_ino == ino);
|
|
ASSERT(uuid_equal(&ip->i_d.di_uuid, &mp->m_sb.sb_uuid));
|
|
ip->i_d.di_crc = 0;
|
|
ip->i_d.di_changecount = 1;
|
|
ip->i_d.di_lsn = 0;
|
|
ip->i_d.di_flags2 = 0;
|
|
memset(&(ip->i_d.di_pad2[0]), 0, sizeof(ip->i_d.di_pad2));
|
|
ip->i_d.di_crtime = ip->i_d.di_mtime;
|
|
}
|
|
|
|
|
|
flags = XFS_ILOG_CORE;
|
|
switch (mode & S_IFMT) {
|
|
case S_IFIFO:
|
|
case S_IFCHR:
|
|
case S_IFBLK:
|
|
case S_IFSOCK:
|
|
ip->i_d.di_format = XFS_DINODE_FMT_DEV;
|
|
ip->i_df.if_u2.if_rdev = rdev;
|
|
ip->i_df.if_flags = 0;
|
|
flags |= XFS_ILOG_DEV;
|
|
break;
|
|
case S_IFREG:
|
|
/*
|
|
* we can't set up filestreams until after the VFS inode
|
|
* is set up properly.
|
|
*/
|
|
if (pip && xfs_inode_is_filestream(pip))
|
|
filestreams = 1;
|
|
/* fall through */
|
|
case S_IFDIR:
|
|
if (pip && (pip->i_d.di_flags & XFS_DIFLAG_ANY)) {
|
|
uint di_flags = 0;
|
|
|
|
if (S_ISDIR(mode)) {
|
|
if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT)
|
|
di_flags |= XFS_DIFLAG_RTINHERIT;
|
|
if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) {
|
|
di_flags |= XFS_DIFLAG_EXTSZINHERIT;
|
|
ip->i_d.di_extsize = pip->i_d.di_extsize;
|
|
}
|
|
} else if (S_ISREG(mode)) {
|
|
if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT)
|
|
di_flags |= XFS_DIFLAG_REALTIME;
|
|
if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) {
|
|
di_flags |= XFS_DIFLAG_EXTSIZE;
|
|
ip->i_d.di_extsize = pip->i_d.di_extsize;
|
|
}
|
|
}
|
|
if ((pip->i_d.di_flags & XFS_DIFLAG_NOATIME) &&
|
|
xfs_inherit_noatime)
|
|
di_flags |= XFS_DIFLAG_NOATIME;
|
|
if ((pip->i_d.di_flags & XFS_DIFLAG_NODUMP) &&
|
|
xfs_inherit_nodump)
|
|
di_flags |= XFS_DIFLAG_NODUMP;
|
|
if ((pip->i_d.di_flags & XFS_DIFLAG_SYNC) &&
|
|
xfs_inherit_sync)
|
|
di_flags |= XFS_DIFLAG_SYNC;
|
|
if ((pip->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) &&
|
|
xfs_inherit_nosymlinks)
|
|
di_flags |= XFS_DIFLAG_NOSYMLINKS;
|
|
if (pip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
|
|
di_flags |= XFS_DIFLAG_PROJINHERIT;
|
|
if ((pip->i_d.di_flags & XFS_DIFLAG_NODEFRAG) &&
|
|
xfs_inherit_nodefrag)
|
|
di_flags |= XFS_DIFLAG_NODEFRAG;
|
|
if (pip->i_d.di_flags & XFS_DIFLAG_FILESTREAM)
|
|
di_flags |= XFS_DIFLAG_FILESTREAM;
|
|
ip->i_d.di_flags |= di_flags;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case S_IFLNK:
|
|
ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS;
|
|
ip->i_df.if_flags = XFS_IFEXTENTS;
|
|
ip->i_df.if_bytes = ip->i_df.if_real_bytes = 0;
|
|
ip->i_df.if_u1.if_extents = NULL;
|
|
break;
|
|
default:
|
|
ASSERT(0);
|
|
}
|
|
/*
|
|
* Attribute fork settings for new inode.
|
|
*/
|
|
ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
|
|
ip->i_d.di_anextents = 0;
|
|
|
|
/*
|
|
* Log the new values stuffed into the inode.
|
|
*/
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_log_inode(tp, ip, flags);
|
|
|
|
/* now that we have an i_mode we can setup inode ops and unlock */
|
|
xfs_setup_inode(ip);
|
|
|
|
/* now we have set up the vfs inode we can associate the filestream */
|
|
if (filestreams) {
|
|
error = xfs_filestream_associate(pip, ip);
|
|
if (error < 0)
|
|
return -error;
|
|
if (!error)
|
|
xfs_iflags_set(ip, XFS_IFILESTREAM);
|
|
}
|
|
|
|
*ipp = ip;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Free up the underlying blocks past new_size. The new size must be smaller
|
|
* than the current size. This routine can be used both for the attribute and
|
|
* data fork, and does not modify the inode size, which is left to the caller.
|
|
*
|
|
* The transaction passed to this routine must have made a permanent log
|
|
* reservation of at least XFS_ITRUNCATE_LOG_RES. This routine may commit the
|
|
* given transaction and start new ones, so make sure everything involved in
|
|
* the transaction is tidy before calling here. Some transaction will be
|
|
* returned to the caller to be committed. The incoming transaction must
|
|
* already include the inode, and both inode locks must be held exclusively.
|
|
* The inode must also be "held" within the transaction. On return the inode
|
|
* will be "held" within the returned transaction. This routine does NOT
|
|
* require any disk space to be reserved for it within the transaction.
|
|
*
|
|
* If we get an error, we must return with the inode locked and linked into the
|
|
* current transaction. This keeps things simple for the higher level code,
|
|
* because it always knows that the inode is locked and held in the transaction
|
|
* that returns to it whether errors occur or not. We don't mark the inode
|
|
* dirty on error so that transactions can be easily aborted if possible.
|
|
*/
|
|
int
|
|
xfs_itruncate_extents(
|
|
struct xfs_trans **tpp,
|
|
struct xfs_inode *ip,
|
|
int whichfork,
|
|
xfs_fsize_t new_size)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct xfs_trans *tp = *tpp;
|
|
struct xfs_trans *ntp;
|
|
xfs_bmap_free_t free_list;
|
|
xfs_fsblock_t first_block;
|
|
xfs_fileoff_t first_unmap_block;
|
|
xfs_fileoff_t last_block;
|
|
xfs_filblks_t unmap_len;
|
|
int committed;
|
|
int error = 0;
|
|
int done = 0;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
ASSERT(!atomic_read(&VFS_I(ip)->i_count) ||
|
|
xfs_isilocked(ip, XFS_IOLOCK_EXCL));
|
|
ASSERT(new_size <= XFS_ISIZE(ip));
|
|
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
|
|
ASSERT(ip->i_itemp != NULL);
|
|
ASSERT(ip->i_itemp->ili_lock_flags == 0);
|
|
ASSERT(!XFS_NOT_DQATTACHED(mp, ip));
|
|
|
|
trace_xfs_itruncate_extents_start(ip, new_size);
|
|
|
|
/*
|
|
* Since it is possible for space to become allocated beyond
|
|
* the end of the file (in a crash where the space is allocated
|
|
* but the inode size is not yet updated), simply remove any
|
|
* blocks which show up between the new EOF and the maximum
|
|
* possible file size. If the first block to be removed is
|
|
* beyond the maximum file size (ie it is the same as last_block),
|
|
* then there is nothing to do.
|
|
*/
|
|
first_unmap_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)new_size);
|
|
last_block = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
|
|
if (first_unmap_block == last_block)
|
|
return 0;
|
|
|
|
ASSERT(first_unmap_block < last_block);
|
|
unmap_len = last_block - first_unmap_block + 1;
|
|
while (!done) {
|
|
xfs_bmap_init(&free_list, &first_block);
|
|
error = xfs_bunmapi(tp, ip,
|
|
first_unmap_block, unmap_len,
|
|
xfs_bmapi_aflag(whichfork),
|
|
XFS_ITRUNC_MAX_EXTENTS,
|
|
&first_block, &free_list,
|
|
&done);
|
|
if (error)
|
|
goto out_bmap_cancel;
|
|
|
|
/*
|
|
* Duplicate the transaction that has the permanent
|
|
* reservation and commit the old transaction.
|
|
*/
|
|
error = xfs_bmap_finish(&tp, &free_list, &committed);
|
|
if (committed)
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
if (error)
|
|
goto out_bmap_cancel;
|
|
|
|
if (committed) {
|
|
/*
|
|
* Mark the inode dirty so it will be logged and
|
|
* moved forward in the log as part of every commit.
|
|
*/
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
}
|
|
|
|
ntp = xfs_trans_dup(tp);
|
|
error = xfs_trans_commit(tp, 0);
|
|
tp = ntp;
|
|
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
if (error)
|
|
goto out;
|
|
|
|
/*
|
|
* Transaction commit worked ok so we can drop the extra ticket
|
|
* reference that we gained in xfs_trans_dup()
|
|
*/
|
|
xfs_log_ticket_put(tp->t_ticket);
|
|
error = xfs_trans_reserve(tp, 0,
|
|
XFS_ITRUNCATE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES,
|
|
XFS_ITRUNCATE_LOG_COUNT);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Always re-log the inode so that our permanent transaction can keep
|
|
* on rolling it forward in the log.
|
|
*/
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
trace_xfs_itruncate_extents_end(ip, new_size);
|
|
|
|
out:
|
|
*tpp = tp;
|
|
return error;
|
|
out_bmap_cancel:
|
|
/*
|
|
* If the bunmapi call encounters an error, return to the caller where
|
|
* the transaction can be properly aborted. We just need to make sure
|
|
* we're not holding any resources that we were not when we came in.
|
|
*/
|
|
xfs_bmap_cancel(&free_list);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* This is called when the inode's link count goes to 0.
|
|
* We place the on-disk inode on a list in the AGI. It
|
|
* will be pulled from this list when the inode is freed.
|
|
*/
|
|
int
|
|
xfs_iunlink(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *ip)
|
|
{
|
|
xfs_mount_t *mp;
|
|
xfs_agi_t *agi;
|
|
xfs_dinode_t *dip;
|
|
xfs_buf_t *agibp;
|
|
xfs_buf_t *ibp;
|
|
xfs_agino_t agino;
|
|
short bucket_index;
|
|
int offset;
|
|
int error;
|
|
|
|
ASSERT(ip->i_d.di_nlink == 0);
|
|
ASSERT(ip->i_d.di_mode != 0);
|
|
|
|
mp = tp->t_mountp;
|
|
|
|
/*
|
|
* Get the agi buffer first. It ensures lock ordering
|
|
* on the list.
|
|
*/
|
|
error = xfs_read_agi(mp, tp, XFS_INO_TO_AGNO(mp, ip->i_ino), &agibp);
|
|
if (error)
|
|
return error;
|
|
agi = XFS_BUF_TO_AGI(agibp);
|
|
|
|
/*
|
|
* Get the index into the agi hash table for the
|
|
* list this inode will go on.
|
|
*/
|
|
agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
|
|
ASSERT(agino != 0);
|
|
bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
|
|
ASSERT(agi->agi_unlinked[bucket_index]);
|
|
ASSERT(be32_to_cpu(agi->agi_unlinked[bucket_index]) != agino);
|
|
|
|
if (agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO)) {
|
|
/*
|
|
* There is already another inode in the bucket we need
|
|
* to add ourselves to. Add us at the front of the list.
|
|
* Here we put the head pointer into our next pointer,
|
|
* and then we fall through to point the head at us.
|
|
*/
|
|
error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
|
|
0, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
ASSERT(dip->di_next_unlinked == cpu_to_be32(NULLAGINO));
|
|
dip->di_next_unlinked = agi->agi_unlinked[bucket_index];
|
|
offset = ip->i_imap.im_boffset +
|
|
offsetof(xfs_dinode_t, di_next_unlinked);
|
|
|
|
/* need to recalc the inode CRC if appropriate */
|
|
xfs_dinode_calc_crc(mp, dip);
|
|
|
|
xfs_trans_inode_buf(tp, ibp);
|
|
xfs_trans_log_buf(tp, ibp, offset,
|
|
(offset + sizeof(xfs_agino_t) - 1));
|
|
xfs_inobp_check(mp, ibp);
|
|
}
|
|
|
|
/*
|
|
* Point the bucket head pointer at the inode being inserted.
|
|
*/
|
|
ASSERT(agino != 0);
|
|
agi->agi_unlinked[bucket_index] = cpu_to_be32(agino);
|
|
offset = offsetof(xfs_agi_t, agi_unlinked) +
|
|
(sizeof(xfs_agino_t) * bucket_index);
|
|
xfs_trans_log_buf(tp, agibp, offset,
|
|
(offset + sizeof(xfs_agino_t) - 1));
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Pull the on-disk inode from the AGI unlinked list.
|
|
*/
|
|
STATIC int
|
|
xfs_iunlink_remove(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *ip)
|
|
{
|
|
xfs_ino_t next_ino;
|
|
xfs_mount_t *mp;
|
|
xfs_agi_t *agi;
|
|
xfs_dinode_t *dip;
|
|
xfs_buf_t *agibp;
|
|
xfs_buf_t *ibp;
|
|
xfs_agnumber_t agno;
|
|
xfs_agino_t agino;
|
|
xfs_agino_t next_agino;
|
|
xfs_buf_t *last_ibp;
|
|
xfs_dinode_t *last_dip = NULL;
|
|
short bucket_index;
|
|
int offset, last_offset = 0;
|
|
int error;
|
|
|
|
mp = tp->t_mountp;
|
|
agno = XFS_INO_TO_AGNO(mp, ip->i_ino);
|
|
|
|
/*
|
|
* Get the agi buffer first. It ensures lock ordering
|
|
* on the list.
|
|
*/
|
|
error = xfs_read_agi(mp, tp, agno, &agibp);
|
|
if (error)
|
|
return error;
|
|
|
|
agi = XFS_BUF_TO_AGI(agibp);
|
|
|
|
/*
|
|
* Get the index into the agi hash table for the
|
|
* list this inode will go on.
|
|
*/
|
|
agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
|
|
ASSERT(agino != 0);
|
|
bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
|
|
ASSERT(agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO));
|
|
ASSERT(agi->agi_unlinked[bucket_index]);
|
|
|
|
if (be32_to_cpu(agi->agi_unlinked[bucket_index]) == agino) {
|
|
/*
|
|
* We're at the head of the list. Get the inode's on-disk
|
|
* buffer to see if there is anyone after us on the list.
|
|
* Only modify our next pointer if it is not already NULLAGINO.
|
|
* This saves us the overhead of dealing with the buffer when
|
|
* there is no need to change it.
|
|
*/
|
|
error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
|
|
0, 0);
|
|
if (error) {
|
|
xfs_warn(mp, "%s: xfs_imap_to_bp returned error %d.",
|
|
__func__, error);
|
|
return error;
|
|
}
|
|
next_agino = be32_to_cpu(dip->di_next_unlinked);
|
|
ASSERT(next_agino != 0);
|
|
if (next_agino != NULLAGINO) {
|
|
dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
|
|
offset = ip->i_imap.im_boffset +
|
|
offsetof(xfs_dinode_t, di_next_unlinked);
|
|
|
|
/* need to recalc the inode CRC if appropriate */
|
|
xfs_dinode_calc_crc(mp, dip);
|
|
|
|
xfs_trans_inode_buf(tp, ibp);
|
|
xfs_trans_log_buf(tp, ibp, offset,
|
|
(offset + sizeof(xfs_agino_t) - 1));
|
|
xfs_inobp_check(mp, ibp);
|
|
} else {
|
|
xfs_trans_brelse(tp, ibp);
|
|
}
|
|
/*
|
|
* Point the bucket head pointer at the next inode.
|
|
*/
|
|
ASSERT(next_agino != 0);
|
|
ASSERT(next_agino != agino);
|
|
agi->agi_unlinked[bucket_index] = cpu_to_be32(next_agino);
|
|
offset = offsetof(xfs_agi_t, agi_unlinked) +
|
|
(sizeof(xfs_agino_t) * bucket_index);
|
|
xfs_trans_log_buf(tp, agibp, offset,
|
|
(offset + sizeof(xfs_agino_t) - 1));
|
|
} else {
|
|
/*
|
|
* We need to search the list for the inode being freed.
|
|
*/
|
|
next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]);
|
|
last_ibp = NULL;
|
|
while (next_agino != agino) {
|
|
struct xfs_imap imap;
|
|
|
|
if (last_ibp)
|
|
xfs_trans_brelse(tp, last_ibp);
|
|
|
|
imap.im_blkno = 0;
|
|
next_ino = XFS_AGINO_TO_INO(mp, agno, next_agino);
|
|
|
|
error = xfs_imap(mp, tp, next_ino, &imap, 0);
|
|
if (error) {
|
|
xfs_warn(mp,
|
|
"%s: xfs_imap returned error %d.",
|
|
__func__, error);
|
|
return error;
|
|
}
|
|
|
|
error = xfs_imap_to_bp(mp, tp, &imap, &last_dip,
|
|
&last_ibp, 0, 0);
|
|
if (error) {
|
|
xfs_warn(mp,
|
|
"%s: xfs_imap_to_bp returned error %d.",
|
|
__func__, error);
|
|
return error;
|
|
}
|
|
|
|
last_offset = imap.im_boffset;
|
|
next_agino = be32_to_cpu(last_dip->di_next_unlinked);
|
|
ASSERT(next_agino != NULLAGINO);
|
|
ASSERT(next_agino != 0);
|
|
}
|
|
|
|
/*
|
|
* Now last_ibp points to the buffer previous to us on the
|
|
* unlinked list. Pull us from the list.
|
|
*/
|
|
error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
|
|
0, 0);
|
|
if (error) {
|
|
xfs_warn(mp, "%s: xfs_imap_to_bp(2) returned error %d.",
|
|
__func__, error);
|
|
return error;
|
|
}
|
|
next_agino = be32_to_cpu(dip->di_next_unlinked);
|
|
ASSERT(next_agino != 0);
|
|
ASSERT(next_agino != agino);
|
|
if (next_agino != NULLAGINO) {
|
|
dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
|
|
offset = ip->i_imap.im_boffset +
|
|
offsetof(xfs_dinode_t, di_next_unlinked);
|
|
|
|
/* need to recalc the inode CRC if appropriate */
|
|
xfs_dinode_calc_crc(mp, dip);
|
|
|
|
xfs_trans_inode_buf(tp, ibp);
|
|
xfs_trans_log_buf(tp, ibp, offset,
|
|
(offset + sizeof(xfs_agino_t) - 1));
|
|
xfs_inobp_check(mp, ibp);
|
|
} else {
|
|
xfs_trans_brelse(tp, ibp);
|
|
}
|
|
/*
|
|
* Point the previous inode on the list to the next inode.
|
|
*/
|
|
last_dip->di_next_unlinked = cpu_to_be32(next_agino);
|
|
ASSERT(next_agino != 0);
|
|
offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked);
|
|
|
|
/* need to recalc the inode CRC if appropriate */
|
|
xfs_dinode_calc_crc(mp, last_dip);
|
|
|
|
xfs_trans_inode_buf(tp, last_ibp);
|
|
xfs_trans_log_buf(tp, last_ibp, offset,
|
|
(offset + sizeof(xfs_agino_t) - 1));
|
|
xfs_inobp_check(mp, last_ibp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* A big issue when freeing the inode cluster is is that we _cannot_ skip any
|
|
* inodes that are in memory - they all must be marked stale and attached to
|
|
* the cluster buffer.
|
|
*/
|
|
STATIC int
|
|
xfs_ifree_cluster(
|
|
xfs_inode_t *free_ip,
|
|
xfs_trans_t *tp,
|
|
xfs_ino_t inum)
|
|
{
|
|
xfs_mount_t *mp = free_ip->i_mount;
|
|
int blks_per_cluster;
|
|
int nbufs;
|
|
int ninodes;
|
|
int i, j;
|
|
xfs_daddr_t blkno;
|
|
xfs_buf_t *bp;
|
|
xfs_inode_t *ip;
|
|
xfs_inode_log_item_t *iip;
|
|
xfs_log_item_t *lip;
|
|
struct xfs_perag *pag;
|
|
|
|
pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, inum));
|
|
if (mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp)) {
|
|
blks_per_cluster = 1;
|
|
ninodes = mp->m_sb.sb_inopblock;
|
|
nbufs = XFS_IALLOC_BLOCKS(mp);
|
|
} else {
|
|
blks_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) /
|
|
mp->m_sb.sb_blocksize;
|
|
ninodes = blks_per_cluster * mp->m_sb.sb_inopblock;
|
|
nbufs = XFS_IALLOC_BLOCKS(mp) / blks_per_cluster;
|
|
}
|
|
|
|
for (j = 0; j < nbufs; j++, inum += ninodes) {
|
|
blkno = XFS_AGB_TO_DADDR(mp, XFS_INO_TO_AGNO(mp, inum),
|
|
XFS_INO_TO_AGBNO(mp, inum));
|
|
|
|
/*
|
|
* We obtain and lock the backing buffer first in the process
|
|
* here, as we have to ensure that any dirty inode that we
|
|
* can't get the flush lock on is attached to the buffer.
|
|
* If we scan the in-memory inodes first, then buffer IO can
|
|
* complete before we get a lock on it, and hence we may fail
|
|
* to mark all the active inodes on the buffer stale.
|
|
*/
|
|
bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno,
|
|
mp->m_bsize * blks_per_cluster,
|
|
XBF_UNMAPPED);
|
|
|
|
if (!bp)
|
|
return ENOMEM;
|
|
|
|
/*
|
|
* This buffer may not have been correctly initialised as we
|
|
* didn't read it from disk. That's not important because we are
|
|
* only using to mark the buffer as stale in the log, and to
|
|
* attach stale cached inodes on it. That means it will never be
|
|
* dispatched for IO. If it is, we want to know about it, and we
|
|
* want it to fail. We can acheive this by adding a write
|
|
* verifier to the buffer.
|
|
*/
|
|
bp->b_ops = &xfs_inode_buf_ops;
|
|
|
|
/*
|
|
* Walk the inodes already attached to the buffer and mark them
|
|
* stale. These will all have the flush locks held, so an
|
|
* in-memory inode walk can't lock them. By marking them all
|
|
* stale first, we will not attempt to lock them in the loop
|
|
* below as the XFS_ISTALE flag will be set.
|
|
*/
|
|
lip = bp->b_fspriv;
|
|
while (lip) {
|
|
if (lip->li_type == XFS_LI_INODE) {
|
|
iip = (xfs_inode_log_item_t *)lip;
|
|
ASSERT(iip->ili_logged == 1);
|
|
lip->li_cb = xfs_istale_done;
|
|
xfs_trans_ail_copy_lsn(mp->m_ail,
|
|
&iip->ili_flush_lsn,
|
|
&iip->ili_item.li_lsn);
|
|
xfs_iflags_set(iip->ili_inode, XFS_ISTALE);
|
|
}
|
|
lip = lip->li_bio_list;
|
|
}
|
|
|
|
|
|
/*
|
|
* For each inode in memory attempt to add it to the inode
|
|
* buffer and set it up for being staled on buffer IO
|
|
* completion. This is safe as we've locked out tail pushing
|
|
* and flushing by locking the buffer.
|
|
*
|
|
* We have already marked every inode that was part of a
|
|
* transaction stale above, which means there is no point in
|
|
* even trying to lock them.
|
|
*/
|
|
for (i = 0; i < ninodes; i++) {
|
|
retry:
|
|
rcu_read_lock();
|
|
ip = radix_tree_lookup(&pag->pag_ici_root,
|
|
XFS_INO_TO_AGINO(mp, (inum + i)));
|
|
|
|
/* Inode not in memory, nothing to do */
|
|
if (!ip) {
|
|
rcu_read_unlock();
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* because this is an RCU protected lookup, we could
|
|
* find a recently freed or even reallocated inode
|
|
* during the lookup. We need to check under the
|
|
* i_flags_lock for a valid inode here. Skip it if it
|
|
* is not valid, the wrong inode or stale.
|
|
*/
|
|
spin_lock(&ip->i_flags_lock);
|
|
if (ip->i_ino != inum + i ||
|
|
__xfs_iflags_test(ip, XFS_ISTALE)) {
|
|
spin_unlock(&ip->i_flags_lock);
|
|
rcu_read_unlock();
|
|
continue;
|
|
}
|
|
spin_unlock(&ip->i_flags_lock);
|
|
|
|
/*
|
|
* Don't try to lock/unlock the current inode, but we
|
|
* _cannot_ skip the other inodes that we did not find
|
|
* in the list attached to the buffer and are not
|
|
* already marked stale. If we can't lock it, back off
|
|
* and retry.
|
|
*/
|
|
if (ip != free_ip &&
|
|
!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) {
|
|
rcu_read_unlock();
|
|
delay(1);
|
|
goto retry;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
xfs_iflock(ip);
|
|
xfs_iflags_set(ip, XFS_ISTALE);
|
|
|
|
/*
|
|
* we don't need to attach clean inodes or those only
|
|
* with unlogged changes (which we throw away, anyway).
|
|
*/
|
|
iip = ip->i_itemp;
|
|
if (!iip || xfs_inode_clean(ip)) {
|
|
ASSERT(ip != free_ip);
|
|
xfs_ifunlock(ip);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
continue;
|
|
}
|
|
|
|
iip->ili_last_fields = iip->ili_fields;
|
|
iip->ili_fields = 0;
|
|
iip->ili_logged = 1;
|
|
xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn,
|
|
&iip->ili_item.li_lsn);
|
|
|
|
xfs_buf_attach_iodone(bp, xfs_istale_done,
|
|
&iip->ili_item);
|
|
|
|
if (ip != free_ip)
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
}
|
|
|
|
xfs_trans_stale_inode_buf(tp, bp);
|
|
xfs_trans_binval(tp, bp);
|
|
}
|
|
|
|
xfs_perag_put(pag);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This is called to return an inode to the inode free list.
|
|
* The inode should already be truncated to 0 length and have
|
|
* no pages associated with it. This routine also assumes that
|
|
* the inode is already a part of the transaction.
|
|
*
|
|
* The on-disk copy of the inode will have been added to the list
|
|
* of unlinked inodes in the AGI. We need to remove the inode from
|
|
* that list atomically with respect to freeing it here.
|
|
*/
|
|
int
|
|
xfs_ifree(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *ip,
|
|
xfs_bmap_free_t *flist)
|
|
{
|
|
int error;
|
|
int delete;
|
|
xfs_ino_t first_ino;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
ASSERT(ip->i_d.di_nlink == 0);
|
|
ASSERT(ip->i_d.di_nextents == 0);
|
|
ASSERT(ip->i_d.di_anextents == 0);
|
|
ASSERT(ip->i_d.di_size == 0 || !S_ISREG(ip->i_d.di_mode));
|
|
ASSERT(ip->i_d.di_nblocks == 0);
|
|
|
|
/*
|
|
* Pull the on-disk inode from the AGI unlinked list.
|
|
*/
|
|
error = xfs_iunlink_remove(tp, ip);
|
|
if (error)
|
|
return error;
|
|
|
|
error = xfs_difree(tp, ip->i_ino, flist, &delete, &first_ino);
|
|
if (error)
|
|
return error;
|
|
|
|
ip->i_d.di_mode = 0; /* mark incore inode as free */
|
|
ip->i_d.di_flags = 0;
|
|
ip->i_d.di_dmevmask = 0;
|
|
ip->i_d.di_forkoff = 0; /* mark the attr fork not in use */
|
|
ip->i_d.di_format = XFS_DINODE_FMT_EXTENTS;
|
|
ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
|
|
/*
|
|
* Bump the generation count so no one will be confused
|
|
* by reincarnations of this inode.
|
|
*/
|
|
ip->i_d.di_gen++;
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
if (delete)
|
|
error = xfs_ifree_cluster(ip, tp, first_ino);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* This is called to unpin an inode. The caller must have the inode locked
|
|
* in at least shared mode so that the buffer cannot be subsequently pinned
|
|
* once someone is waiting for it to be unpinned.
|
|
*/
|
|
static void
|
|
xfs_iunpin(
|
|
struct xfs_inode *ip)
|
|
{
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
|
|
|
|
trace_xfs_inode_unpin_nowait(ip, _RET_IP_);
|
|
|
|
/* Give the log a push to start the unpinning I/O */
|
|
xfs_log_force_lsn(ip->i_mount, ip->i_itemp->ili_last_lsn, 0);
|
|
|
|
}
|
|
|
|
static void
|
|
__xfs_iunpin_wait(
|
|
struct xfs_inode *ip)
|
|
{
|
|
wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IPINNED_BIT);
|
|
DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IPINNED_BIT);
|
|
|
|
xfs_iunpin(ip);
|
|
|
|
do {
|
|
prepare_to_wait(wq, &wait.wait, TASK_UNINTERRUPTIBLE);
|
|
if (xfs_ipincount(ip))
|
|
io_schedule();
|
|
} while (xfs_ipincount(ip));
|
|
finish_wait(wq, &wait.wait);
|
|
}
|
|
|
|
void
|
|
xfs_iunpin_wait(
|
|
struct xfs_inode *ip)
|
|
{
|
|
if (xfs_ipincount(ip))
|
|
__xfs_iunpin_wait(ip);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_iflush_cluster(
|
|
xfs_inode_t *ip,
|
|
xfs_buf_t *bp)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
struct xfs_perag *pag;
|
|
unsigned long first_index, mask;
|
|
unsigned long inodes_per_cluster;
|
|
int ilist_size;
|
|
xfs_inode_t **ilist;
|
|
xfs_inode_t *iq;
|
|
int nr_found;
|
|
int clcount = 0;
|
|
int bufwasdelwri;
|
|
int i;
|
|
|
|
pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
|
|
|
|
inodes_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog;
|
|
ilist_size = inodes_per_cluster * sizeof(xfs_inode_t *);
|
|
ilist = kmem_alloc(ilist_size, KM_MAYFAIL|KM_NOFS);
|
|
if (!ilist)
|
|
goto out_put;
|
|
|
|
mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1);
|
|
first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask;
|
|
rcu_read_lock();
|
|
/* really need a gang lookup range call here */
|
|
nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist,
|
|
first_index, inodes_per_cluster);
|
|
if (nr_found == 0)
|
|
goto out_free;
|
|
|
|
for (i = 0; i < nr_found; i++) {
|
|
iq = ilist[i];
|
|
if (iq == ip)
|
|
continue;
|
|
|
|
/*
|
|
* because this is an RCU protected lookup, we could find a
|
|
* recently freed or even reallocated inode during the lookup.
|
|
* We need to check under the i_flags_lock for a valid inode
|
|
* here. Skip it if it is not valid or the wrong inode.
|
|
*/
|
|
spin_lock(&ip->i_flags_lock);
|
|
if (!ip->i_ino ||
|
|
(XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) {
|
|
spin_unlock(&ip->i_flags_lock);
|
|
continue;
|
|
}
|
|
spin_unlock(&ip->i_flags_lock);
|
|
|
|
/*
|
|
* Do an un-protected check to see if the inode is dirty and
|
|
* is a candidate for flushing. These checks will be repeated
|
|
* later after the appropriate locks are acquired.
|
|
*/
|
|
if (xfs_inode_clean(iq) && xfs_ipincount(iq) == 0)
|
|
continue;
|
|
|
|
/*
|
|
* Try to get locks. If any are unavailable or it is pinned,
|
|
* then this inode cannot be flushed and is skipped.
|
|
*/
|
|
|
|
if (!xfs_ilock_nowait(iq, XFS_ILOCK_SHARED))
|
|
continue;
|
|
if (!xfs_iflock_nowait(iq)) {
|
|
xfs_iunlock(iq, XFS_ILOCK_SHARED);
|
|
continue;
|
|
}
|
|
if (xfs_ipincount(iq)) {
|
|
xfs_ifunlock(iq);
|
|
xfs_iunlock(iq, XFS_ILOCK_SHARED);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* arriving here means that this inode can be flushed. First
|
|
* re-check that it's dirty before flushing.
|
|
*/
|
|
if (!xfs_inode_clean(iq)) {
|
|
int error;
|
|
error = xfs_iflush_int(iq, bp);
|
|
if (error) {
|
|
xfs_iunlock(iq, XFS_ILOCK_SHARED);
|
|
goto cluster_corrupt_out;
|
|
}
|
|
clcount++;
|
|
} else {
|
|
xfs_ifunlock(iq);
|
|
}
|
|
xfs_iunlock(iq, XFS_ILOCK_SHARED);
|
|
}
|
|
|
|
if (clcount) {
|
|
XFS_STATS_INC(xs_icluster_flushcnt);
|
|
XFS_STATS_ADD(xs_icluster_flushinode, clcount);
|
|
}
|
|
|
|
out_free:
|
|
rcu_read_unlock();
|
|
kmem_free(ilist);
|
|
out_put:
|
|
xfs_perag_put(pag);
|
|
return 0;
|
|
|
|
|
|
cluster_corrupt_out:
|
|
/*
|
|
* Corruption detected in the clustering loop. Invalidate the
|
|
* inode buffer and shut down the filesystem.
|
|
*/
|
|
rcu_read_unlock();
|
|
/*
|
|
* Clean up the buffer. If it was delwri, just release it --
|
|
* brelse can handle it with no problems. If not, shut down the
|
|
* filesystem before releasing the buffer.
|
|
*/
|
|
bufwasdelwri = (bp->b_flags & _XBF_DELWRI_Q);
|
|
if (bufwasdelwri)
|
|
xfs_buf_relse(bp);
|
|
|
|
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
|
|
|
|
if (!bufwasdelwri) {
|
|
/*
|
|
* Just like incore_relse: if we have b_iodone functions,
|
|
* mark the buffer as an error and call them. Otherwise
|
|
* mark it as stale and brelse.
|
|
*/
|
|
if (bp->b_iodone) {
|
|
XFS_BUF_UNDONE(bp);
|
|
xfs_buf_stale(bp);
|
|
xfs_buf_ioerror(bp, EIO);
|
|
xfs_buf_ioend(bp, 0);
|
|
} else {
|
|
xfs_buf_stale(bp);
|
|
xfs_buf_relse(bp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Unlocks the flush lock
|
|
*/
|
|
xfs_iflush_abort(iq, false);
|
|
kmem_free(ilist);
|
|
xfs_perag_put(pag);
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
|
|
/*
|
|
* Flush dirty inode metadata into the backing buffer.
|
|
*
|
|
* The caller must have the inode lock and the inode flush lock held. The
|
|
* inode lock will still be held upon return to the caller, and the inode
|
|
* flush lock will be released after the inode has reached the disk.
|
|
*
|
|
* The caller must write out the buffer returned in *bpp and release it.
|
|
*/
|
|
int
|
|
xfs_iflush(
|
|
struct xfs_inode *ip,
|
|
struct xfs_buf **bpp)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct xfs_buf *bp;
|
|
struct xfs_dinode *dip;
|
|
int error;
|
|
|
|
XFS_STATS_INC(xs_iflush_count);
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
|
|
ASSERT(xfs_isiflocked(ip));
|
|
ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE ||
|
|
ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK));
|
|
|
|
*bpp = NULL;
|
|
|
|
xfs_iunpin_wait(ip);
|
|
|
|
/*
|
|
* For stale inodes we cannot rely on the backing buffer remaining
|
|
* stale in cache for the remaining life of the stale inode and so
|
|
* xfs_imap_to_bp() below may give us a buffer that no longer contains
|
|
* inodes below. We have to check this after ensuring the inode is
|
|
* unpinned so that it is safe to reclaim the stale inode after the
|
|
* flush call.
|
|
*/
|
|
if (xfs_iflags_test(ip, XFS_ISTALE)) {
|
|
xfs_ifunlock(ip);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This may have been unpinned because the filesystem is shutting
|
|
* down forcibly. If that's the case we must not write this inode
|
|
* to disk, because the log record didn't make it to disk.
|
|
*
|
|
* We also have to remove the log item from the AIL in this case,
|
|
* as we wait for an empty AIL as part of the unmount process.
|
|
*/
|
|
if (XFS_FORCED_SHUTDOWN(mp)) {
|
|
error = XFS_ERROR(EIO);
|
|
goto abort_out;
|
|
}
|
|
|
|
/*
|
|
* Get the buffer containing the on-disk inode.
|
|
*/
|
|
error = xfs_imap_to_bp(mp, NULL, &ip->i_imap, &dip, &bp, XBF_TRYLOCK,
|
|
0);
|
|
if (error || !bp) {
|
|
xfs_ifunlock(ip);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* First flush out the inode that xfs_iflush was called with.
|
|
*/
|
|
error = xfs_iflush_int(ip, bp);
|
|
if (error)
|
|
goto corrupt_out;
|
|
|
|
/*
|
|
* If the buffer is pinned then push on the log now so we won't
|
|
* get stuck waiting in the write for too long.
|
|
*/
|
|
if (xfs_buf_ispinned(bp))
|
|
xfs_log_force(mp, 0);
|
|
|
|
/*
|
|
* inode clustering:
|
|
* see if other inodes can be gathered into this write
|
|
*/
|
|
error = xfs_iflush_cluster(ip, bp);
|
|
if (error)
|
|
goto cluster_corrupt_out;
|
|
|
|
*bpp = bp;
|
|
return 0;
|
|
|
|
corrupt_out:
|
|
xfs_buf_relse(bp);
|
|
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
|
|
cluster_corrupt_out:
|
|
error = XFS_ERROR(EFSCORRUPTED);
|
|
abort_out:
|
|
/*
|
|
* Unlocks the flush lock
|
|
*/
|
|
xfs_iflush_abort(ip, false);
|
|
return error;
|
|
}
|
|
|
|
|
|
STATIC int
|
|
xfs_iflush_int(
|
|
struct xfs_inode *ip,
|
|
struct xfs_buf *bp)
|
|
{
|
|
struct xfs_inode_log_item *iip = ip->i_itemp;
|
|
struct xfs_dinode *dip;
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
|
|
ASSERT(xfs_isiflocked(ip));
|
|
ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE ||
|
|
ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK));
|
|
ASSERT(iip != NULL && iip->ili_fields != 0);
|
|
|
|
/* set *dip = inode's place in the buffer */
|
|
dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset);
|
|
|
|
if (XFS_TEST_ERROR(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC),
|
|
mp, XFS_ERRTAG_IFLUSH_1, XFS_RANDOM_IFLUSH_1)) {
|
|
xfs_alert_tag(mp, XFS_PTAG_IFLUSH,
|
|
"%s: Bad inode %Lu magic number 0x%x, ptr 0x%p",
|
|
__func__, ip->i_ino, be16_to_cpu(dip->di_magic), dip);
|
|
goto corrupt_out;
|
|
}
|
|
if (XFS_TEST_ERROR(ip->i_d.di_magic != XFS_DINODE_MAGIC,
|
|
mp, XFS_ERRTAG_IFLUSH_2, XFS_RANDOM_IFLUSH_2)) {
|
|
xfs_alert_tag(mp, XFS_PTAG_IFLUSH,
|
|
"%s: Bad inode %Lu, ptr 0x%p, magic number 0x%x",
|
|
__func__, ip->i_ino, ip, ip->i_d.di_magic);
|
|
goto corrupt_out;
|
|
}
|
|
if (S_ISREG(ip->i_d.di_mode)) {
|
|
if (XFS_TEST_ERROR(
|
|
(ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) &&
|
|
(ip->i_d.di_format != XFS_DINODE_FMT_BTREE),
|
|
mp, XFS_ERRTAG_IFLUSH_3, XFS_RANDOM_IFLUSH_3)) {
|
|
xfs_alert_tag(mp, XFS_PTAG_IFLUSH,
|
|
"%s: Bad regular inode %Lu, ptr 0x%p",
|
|
__func__, ip->i_ino, ip);
|
|
goto corrupt_out;
|
|
}
|
|
} else if (S_ISDIR(ip->i_d.di_mode)) {
|
|
if (XFS_TEST_ERROR(
|
|
(ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) &&
|
|
(ip->i_d.di_format != XFS_DINODE_FMT_BTREE) &&
|
|
(ip->i_d.di_format != XFS_DINODE_FMT_LOCAL),
|
|
mp, XFS_ERRTAG_IFLUSH_4, XFS_RANDOM_IFLUSH_4)) {
|
|
xfs_alert_tag(mp, XFS_PTAG_IFLUSH,
|
|
"%s: Bad directory inode %Lu, ptr 0x%p",
|
|
__func__, ip->i_ino, ip);
|
|
goto corrupt_out;
|
|
}
|
|
}
|
|
if (XFS_TEST_ERROR(ip->i_d.di_nextents + ip->i_d.di_anextents >
|
|
ip->i_d.di_nblocks, mp, XFS_ERRTAG_IFLUSH_5,
|
|
XFS_RANDOM_IFLUSH_5)) {
|
|
xfs_alert_tag(mp, XFS_PTAG_IFLUSH,
|
|
"%s: detected corrupt incore inode %Lu, "
|
|
"total extents = %d, nblocks = %Ld, ptr 0x%p",
|
|
__func__, ip->i_ino,
|
|
ip->i_d.di_nextents + ip->i_d.di_anextents,
|
|
ip->i_d.di_nblocks, ip);
|
|
goto corrupt_out;
|
|
}
|
|
if (XFS_TEST_ERROR(ip->i_d.di_forkoff > mp->m_sb.sb_inodesize,
|
|
mp, XFS_ERRTAG_IFLUSH_6, XFS_RANDOM_IFLUSH_6)) {
|
|
xfs_alert_tag(mp, XFS_PTAG_IFLUSH,
|
|
"%s: bad inode %Lu, forkoff 0x%x, ptr 0x%p",
|
|
__func__, ip->i_ino, ip->i_d.di_forkoff, ip);
|
|
goto corrupt_out;
|
|
}
|
|
|
|
/*
|
|
* Inode item log recovery for v1/v2 inodes are dependent on the
|
|
* di_flushiter count for correct sequencing. We bump the flush
|
|
* iteration count so we can detect flushes which postdate a log record
|
|
* during recovery. This is redundant as we now log every change and
|
|
* hence this can't happen but we need to still do it to ensure
|
|
* backwards compatibility with old kernels that predate logging all
|
|
* inode changes.
|
|
*/
|
|
if (ip->i_d.di_version < 3)
|
|
ip->i_d.di_flushiter++;
|
|
|
|
/*
|
|
* Copy the dirty parts of the inode into the on-disk
|
|
* inode. We always copy out the core of the inode,
|
|
* because if the inode is dirty at all the core must
|
|
* be.
|
|
*/
|
|
xfs_dinode_to_disk(dip, &ip->i_d);
|
|
|
|
/* Wrap, we never let the log put out DI_MAX_FLUSH */
|
|
if (ip->i_d.di_flushiter == DI_MAX_FLUSH)
|
|
ip->i_d.di_flushiter = 0;
|
|
|
|
/*
|
|
* If this is really an old format inode and the superblock version
|
|
* has not been updated to support only new format inodes, then
|
|
* convert back to the old inode format. If the superblock version
|
|
* has been updated, then make the conversion permanent.
|
|
*/
|
|
ASSERT(ip->i_d.di_version == 1 || xfs_sb_version_hasnlink(&mp->m_sb));
|
|
if (ip->i_d.di_version == 1) {
|
|
if (!xfs_sb_version_hasnlink(&mp->m_sb)) {
|
|
/*
|
|
* Convert it back.
|
|
*/
|
|
ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1);
|
|
dip->di_onlink = cpu_to_be16(ip->i_d.di_nlink);
|
|
} else {
|
|
/*
|
|
* The superblock version has already been bumped,
|
|
* so just make the conversion to the new inode
|
|
* format permanent.
|
|
*/
|
|
ip->i_d.di_version = 2;
|
|
dip->di_version = 2;
|
|
ip->i_d.di_onlink = 0;
|
|
dip->di_onlink = 0;
|
|
memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
|
|
memset(&(dip->di_pad[0]), 0,
|
|
sizeof(dip->di_pad));
|
|
ASSERT(xfs_get_projid(ip) == 0);
|
|
}
|
|
}
|
|
|
|
xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK, bp);
|
|
if (XFS_IFORK_Q(ip))
|
|
xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK, bp);
|
|
xfs_inobp_check(mp, bp);
|
|
|
|
/*
|
|
* We've recorded everything logged in the inode, so we'd like to clear
|
|
* the ili_fields bits so we don't log and flush things unnecessarily.
|
|
* However, we can't stop logging all this information until the data
|
|
* we've copied into the disk buffer is written to disk. If we did we
|
|
* might overwrite the copy of the inode in the log with all the data
|
|
* after re-logging only part of it, and in the face of a crash we
|
|
* wouldn't have all the data we need to recover.
|
|
*
|
|
* What we do is move the bits to the ili_last_fields field. When
|
|
* logging the inode, these bits are moved back to the ili_fields field.
|
|
* In the xfs_iflush_done() routine we clear ili_last_fields, since we
|
|
* know that the information those bits represent is permanently on
|
|
* disk. As long as the flush completes before the inode is logged
|
|
* again, then both ili_fields and ili_last_fields will be cleared.
|
|
*
|
|
* We can play with the ili_fields bits here, because the inode lock
|
|
* must be held exclusively in order to set bits there and the flush
|
|
* lock protects the ili_last_fields bits. Set ili_logged so the flush
|
|
* done routine can tell whether or not to look in the AIL. Also, store
|
|
* the current LSN of the inode so that we can tell whether the item has
|
|
* moved in the AIL from xfs_iflush_done(). In order to read the lsn we
|
|
* need the AIL lock, because it is a 64 bit value that cannot be read
|
|
* atomically.
|
|
*/
|
|
iip->ili_last_fields = iip->ili_fields;
|
|
iip->ili_fields = 0;
|
|
iip->ili_logged = 1;
|
|
|
|
xfs_trans_ail_copy_lsn(mp->m_ail, &iip->ili_flush_lsn,
|
|
&iip->ili_item.li_lsn);
|
|
|
|
/*
|
|
* Attach the function xfs_iflush_done to the inode's
|
|
* buffer. This will remove the inode from the AIL
|
|
* and unlock the inode's flush lock when the inode is
|
|
* completely written to disk.
|
|
*/
|
|
xfs_buf_attach_iodone(bp, xfs_iflush_done, &iip->ili_item);
|
|
|
|
/* update the lsn in the on disk inode if required */
|
|
if (ip->i_d.di_version == 3)
|
|
dip->di_lsn = cpu_to_be64(iip->ili_item.li_lsn);
|
|
|
|
/* generate the checksum. */
|
|
xfs_dinode_calc_crc(mp, dip);
|
|
|
|
ASSERT(bp->b_fspriv != NULL);
|
|
ASSERT(bp->b_iodone != NULL);
|
|
return 0;
|
|
|
|
corrupt_out:
|
|
return XFS_ERROR(EFSCORRUPTED);
|
|
}
|
|
|
|
/*
|
|
* Test whether it is appropriate to check an inode for and free post EOF
|
|
* blocks. The 'force' parameter determines whether we should also consider
|
|
* regular files that are marked preallocated or append-only.
|
|
*/
|
|
bool
|
|
xfs_can_free_eofblocks(struct xfs_inode *ip, bool force)
|
|
{
|
|
/* prealloc/delalloc exists only on regular files */
|
|
if (!S_ISREG(ip->i_d.di_mode))
|
|
return false;
|
|
|
|
/*
|
|
* Zero sized files with no cached pages and delalloc blocks will not
|
|
* have speculative prealloc/delalloc blocks to remove.
|
|
*/
|
|
if (VFS_I(ip)->i_size == 0 &&
|
|
VN_CACHED(VFS_I(ip)) == 0 &&
|
|
ip->i_delayed_blks == 0)
|
|
return false;
|
|
|
|
/* If we haven't read in the extent list, then don't do it now. */
|
|
if (!(ip->i_df.if_flags & XFS_IFEXTENTS))
|
|
return false;
|
|
|
|
/*
|
|
* Do not free real preallocated or append-only files unless the file
|
|
* has delalloc blocks and we are forced to remove them.
|
|
*/
|
|
if (ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND))
|
|
if (!force || ip->i_delayed_blks == 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|