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authorTrond Myklebust <Trond.Myklebust@netapp.com>2008-10-05 12:07:23 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-10-07 17:29:49 -0400
commit870a5be8b92151332da65021b7b21104e9c1de07 (patch)
tree041ec4a0c5304ff74b7b1cd2c09a7d92e08d6cac /fs/nfs
parent7973c1f15a0687f47ed70e591e4642d6fc4334d0 (diff)
downloadop-kernel-dev-870a5be8b92151332da65021b7b21104e9c1de07.zip
op-kernel-dev-870a5be8b92151332da65021b7b21104e9c1de07.tar.gz
NFS: Clean up nfs_refresh_inode() and nfs_post_op_update_inode()
Try to avoid taking and dropping the inode->i_lock more than once. Do so by moving the code in nfs_refresh_inode() that needs to be done under the spinlock into a function nfs_refresh_inode_locked(), and then having both nfs_refresh_inode() and nfs_post_op_update_inode() call it directly. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/inode.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 52daefa..f189169 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -948,6 +948,15 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
return 0;
}
+static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+
+ if (time_after(fattr->time_start, nfsi->last_updated))
+ return nfs_update_inode(inode, fattr);
+ return nfs_check_inode_attributes(inode, fattr);
+}
+
/**
* nfs_refresh_inode - try to update the inode attribute cache
* @inode - pointer to inode
@@ -960,17 +969,12 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
*/
int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
{
- struct nfs_inode *nfsi = NFS_I(inode);
int status;
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
return 0;
spin_lock(&inode->i_lock);
- if (time_after(fattr->time_start, nfsi->last_updated))
- status = nfs_update_inode(inode, fattr);
- else
- status = nfs_check_inode_attributes(inode, fattr);
-
+ status = nfs_refresh_inode_locked(inode, fattr);
spin_unlock(&inode->i_lock);
return status;
}
@@ -992,13 +996,16 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
{
struct nfs_inode *nfsi = NFS_I(inode);
+ int status = 0;
spin_lock(&inode->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
if (S_ISDIR(inode->i_mode))
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
+ if ((fattr->valid & NFS_ATTR_FATTR) != 0)
+ status = nfs_refresh_inode_locked(inode, fattr);
spin_unlock(&inode->i_lock);
- return nfs_refresh_inode(inode, fattr);
+ return status;
}
/**
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