[PATCH 2/7] xfs: split inode flushing from xfs_sync_inodes_ag

Christoph Hellwig
2009-05-14T17:15:51Z

[-- Attachment #1: sync2.diff --]
[-- Type: text/plain, Size: 2243 bytes --]

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>

Index: xfs/fs/xfs/linux-2.6/xfs_sync.c
===================================================================
--- xfs.orig/fs/xfs/linux-2.6/xfs_sync.c 2009-05-14 16:17:41.359813297 +0200
+++ xfs/fs/xfs/linux-2.6/xfs_sync.c 2009-05-14 19:05:25.545684101 +0200
@@ -76,6 +76,34 @@ 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, XFS_IFLUSH_SYNC);
+
+ 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.
@@ -95,7 +123,6 @@ 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
@@ -154,22 +181,10 @@ 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;