Commit 91ba2eee authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4: Add post-op attributes to nfs4_proc_link() 



 Optimise attribute revalidation when hardlinking. Add post-op attributes
 for the directory and the original inode.

 Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent cf809556

fs/nfs/nfs4proc.c

+17 −5
Original line number Diff line number Diff line
@@ -1724,22 +1724,34 @@ static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 


static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)

{

	struct nfs_server *server = NFS_SERVER(inode);

	struct nfs4_link_arg arg = {

		.fh     = NFS_FH(inode),

		.dir_fh = NFS_FH(dir),

		.name   = name,

		.bitmask = server->attr_bitmask,

	};

	struct nfs_fattr fattr, dir_attr;

	struct nfs4_link_res res = {

		.server = server,

		.fattr = &fattr,

		.dir_attr = &dir_attr,

	};

	struct nfs4_change_info	cinfo = { };

	struct rpc_message msg = {

		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],

		.rpc_argp = &arg,

		.rpc_resp = &cinfo,

		.rpc_resp = &res,

	};

	int			status;



	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);

	if (!status)

		update_changeattr(dir, &cinfo);

	nfs_fattr_init(res.fattr);

	nfs_fattr_init(res.dir_attr);

	status = rpc_call_sync(server->client, &msg, 0);

	if (!status) {

		update_changeattr(dir, &res.cinfo);

		nfs_post_op_update_inode(dir, res.dir_attr);

		nfs_refresh_inode(inode, res.fattr);

	}



	return status;

}

fs/nfs/nfs4xdr.c

+28 −6
Original line number Diff line number Diff line
@@ -324,12 +324,18 @@ static int nfs_stat_to_errno(int); 
				encode_putfh_maxsz + \

				encode_savefh_maxsz + \

				encode_putfh_maxsz + \

				encode_link_maxsz)

				encode_link_maxsz + \

				decode_getattr_maxsz + \

				encode_restorefh_maxsz + \

				decode_getattr_maxsz)

#define NFS4_dec_link_sz	(compound_decode_hdr_maxsz + \

				decode_putfh_maxsz + \

				decode_savefh_maxsz + \

				decode_putfh_maxsz + \

				decode_link_maxsz)

				decode_link_maxsz + \

				decode_getattr_maxsz + \

				decode_restorefh_maxsz + \

				decode_getattr_maxsz)

#define NFS4_enc_symlink_sz	(compound_encode_hdr_maxsz + \

				encode_putfh_maxsz + \

				encode_symlink_maxsz + \
@@ -1357,7 +1363,7 @@ static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs 
{

	struct xdr_stream xdr;

	struct compound_hdr hdr = {

		.nops = 4,

		.nops = 7,

	};

	int status;
@@ -1369,7 +1375,13 @@ static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs 
		goto out;

	if ((status = encode_putfh(&xdr, args->dir_fh)) != 0)

		goto out;

	status = encode_link(&xdr, args->name);

	if ((status = encode_link(&xdr, args->name)) != 0)

		goto out;

	if ((status = encode_getfattr(&xdr, args->bitmask)) != 0)

		goto out;

	if ((status = encode_restorefh(&xdr)) != 0)

		goto out;

	status = encode_getfattr(&xdr, args->bitmask);

out:

	return status;

}
@@ -3529,7 +3541,7 @@ static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_ 
/*

 * Decode LINK response

 */

static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo)

static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_link_res *res)

{

	struct xdr_stream xdr;

	struct compound_hdr hdr;
@@ -3544,7 +3556,17 @@ static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_ch 
		goto out;

	if ((status = decode_putfh(&xdr)) != 0)

		goto out;

	status = decode_link(&xdr, cinfo);

	if ((status = decode_link(&xdr, &res->cinfo)) != 0)

		goto out;

	/*

	 * Note order: OP_LINK leaves the directory as the current

	 *             filehandle.

	 */

	if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0)

		goto out;

	if ((status = decode_restorefh(&xdr)) != 0)

		goto out;

	decode_getfattr(&xdr, res->fattr, res->server);

out:

	return status;

}

include/linux/nfs_xdr.h

+9 −0
Original line number Diff line number Diff line
@@ -566,8 +566,17 @@ struct nfs4_link_arg { 
	const struct nfs_fh *		fh;

	const struct nfs_fh *		dir_fh;

	const struct qstr *		name;

	const u32 *			bitmask;

};



struct nfs4_link_res {

	const struct nfs_server *	server;

	struct nfs_fattr *		fattr;

	struct nfs4_change_info		cinfo;

	struct nfs_fattr *		dir_attr;

};





struct nfs4_lookup_arg {

	const struct nfs_fh *		dir_fh;

	const struct qstr *		name;