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Commit 870a5be8 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

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: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 7973c1f1

fs/nfs/inode.c

+14 −7
Original line number Diff line number Diff line
@@ -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;

}



/**