Commit 9936781d authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4: Try to recover from getfh failures in nfs4_xdr_dec_open 



Try harder to recover the open state if the server failed to return a
filehandle.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 56659e99

fs/nfs/nfs4proc.c

+6 −1
Original line number Diff line number Diff line
@@ -66,6 +66,8 @@ static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry 
static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);

static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);

static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags);

static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);

static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);



/* Prevent leaks of NFSv4 errors into userland */

int nfs4_map_errors(int err)
@@ -930,6 +932,9 @@ static int _nfs4_proc_open(struct nfs4_opendata *data) 
	if (status != 0 || !data->rpc_done)

		return status;



	if (o_res->fh.size == 0)

		_nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);



	if (o_arg->open_flags & O_CREAT) {

		update_changeattr(dir, &o_res->cinfo);

		nfs_post_op_update_inode(dir, o_res->dir_attr);
@@ -941,7 +946,7 @@ static int _nfs4_proc_open(struct nfs4_opendata *data) 
			return status;

	}

	if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))

		return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);

		_nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);

	return 0;

}

fs/nfs/nfs4xdr.c

+4 −4
Original line number Diff line number Diff line
@@ -3161,11 +3161,12 @@ static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh) 
	uint32_t len;

	int status;



	/* Zero handle first to allow comparisons */

	memset(fh, 0, sizeof(*fh));



	status = decode_op_hdr(xdr, OP_GETFH);

	if (status)

		return status;

	/* Zero handle first to allow comparisons */

	memset(fh, 0, sizeof(*fh));



	READ_BUF(4);

	READ32(len);
@@ -4030,8 +4031,7 @@ static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openr 
        status = decode_open(&xdr, res);

        if (status)

                goto out;

	status = decode_getfh(&xdr, &res->fh);

        if (status)

	if (decode_getfh(&xdr, &res->fh) != 0)

		goto out;

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

		goto out;