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stop using igrab in xfs_vn_link 

->link is guranteed to get an already reference inode passed so we
can do a simple increment of i_count instead of using igrab and thus
avoid banging on the global inode_lock.  This is what most filesystems
already do.

Also move the increment after the call to xfs_link to simplify error
handling.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>
This commit is contained in:
Christoph Hellwig 2008-12-03 12:20:27 +01:00 committed by Niv Sardi
parent 5d765b976c
commit d9424b3c4a
1 changed files with 3 additions and 6 deletions
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9
fs/xfs/linux-2.6/xfs_iops.c
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@ -367,21 +367,18 @@ xfs_vn_link(
struct inode *dir,
struct dentry *dentry)
{
struct inode *inode; /* inode of guy being linked to */
struct inode *inode = old_dentry->d_inode;
struct xfs_name name;
int error;
inode = old_dentry->d_inode;
xfs_dentry_to_name(&name, dentry);
igrab(inode);
error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
if (unlikely(error)) {
iput(inode);
if (unlikely(error))
return -error;
}
xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED);
atomic_inc(&inode->i_count);
d_instantiate(dentry, inode);
return 0;
}