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xfs: split inode flushing from xfs_sync_inodes_ag 

In many cases we only want to sync inode metadata. Split out the inode
flushing into a separate helper to prepare factoring the inode sync code.

Based on a patch from Dave Chinner, but redone to keep the current behaviour
exactly and leave changes to the flushing logic to another patch.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
This commit is contained in:
Christoph Hellwig 2009-06-08 15:35:05 +02:00 committed by Christoph Hellwig
parent 5a34d5cd09
commit 845b6d0cbb
1 changed files with 33 additions and 17 deletions
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50
fs/xfs/linux-2.6/xfs_sync.c
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@ -77,6 +77,35 @@ xfs_sync_inode_data(
return error;
}
STATIC int
xfs_sync_inode_attr(
struct xfs_inode *ip,
int flags)
{
int error = 0;
xfs_ilock(ip, XFS_ILOCK_SHARED);
if (xfs_inode_clean(ip))
goto out_unlock;
if (!xfs_iflock_nowait(ip)) {
if (!(flags & SYNC_WAIT))
goto out_unlock;
xfs_iflock(ip);
}
if (xfs_inode_clean(ip)) {
xfs_ifunlock(ip);
goto out_unlock;
}
error = xfs_iflush(ip, (flags & SYNC_WAIT) ?
XFS_IFLUSH_SYNC : XFS_IFLUSH_DELWRI);
out_unlock:
xfs_iunlock(ip, XFS_ILOCK_SHARED);
return error;
}
/*
* Sync all the inodes in the given AG according to the
* direction given by the flags.
@ -96,7 +125,6 @@ xfs_sync_inodes_ag(
do {
struct inode *inode;
xfs_inode_t *ip = NULL;
int lock_flags = XFS_ILOCK_SHARED;
/*
* use a gang lookup to find the next inode in the tree
@ -155,22 +183,10 @@ xfs_sync_inodes_ag(
if (flags & SYNC_DELWRI)
error = xfs_sync_inode_data(ip, flags);
xfs_ilock(ip, XFS_ILOCK_SHARED);
if ((flags & SYNC_ATTR) && !xfs_inode_clean(ip)) {
if (flags & SYNC_WAIT) {
xfs_iflock(ip);
if (!xfs_inode_clean(ip))
error = xfs_iflush(ip, XFS_IFLUSH_SYNC);
else
xfs_ifunlock(ip);
} else if (xfs_iflock_nowait(ip)) {
if (!xfs_inode_clean(ip))
error = xfs_iflush(ip, XFS_IFLUSH_DELWRI);
else
xfs_ifunlock(ip);
}
}
xfs_iput(ip, lock_flags);
if (flags & SYNC_ATTR)
error = xfs_sync_inode_attr(ip, flags);
IRELE(ip);
if (error)
last_error = error;