NFS: Remake nfsroot_mount as a permanent part of NFS client
In preparation for supporting NFSv2 and NFSv3 mount option handling in the
kernel NFS client, convert mount_clnt.c to be a permanent part of the NFS
client, instead of built only when CONFIG_ROOT_NFS is enabled.
In addition, we also replace the "struct sockaddr_in *" argument with
something more generic, to help support IPv6 at some later point.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index f4580b4..b55cb23 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -6,8 +6,8 @@
nfs-y := client.o dir.o file.o getroot.o inode.o super.o nfs2xdr.o \
pagelist.o proc.o read.o symlink.o unlink.o \
- write.o namespace.o
-nfs-$(CONFIG_ROOT_NFS) += nfsroot.o mount_clnt.o
+ write.o namespace.o mount_clnt.o
+nfs-$(CONFIG_ROOT_NFS) += nfsroot.o
nfs-$(CONFIG_NFS_V3) += nfs3proc.o nfs3xdr.o
nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \
diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c
index 2892ec8..ee4899d 100644
--- a/fs/nfs/mount_clnt.c
+++ b/fs/nfs/mount_clnt.c
@@ -18,7 +18,7 @@
#include <linux/nfs_fs.h>
#ifdef RPC_DEBUG
-# define NFSDBG_FACILITY NFSDBG_ROOT
+# define NFSDBG_FACILITY NFSDBG_MOUNT
#endif
/*
@@ -28,7 +28,6 @@
#define MOUNT_UMNT 3
*/
-static struct rpc_clnt * mnt_create(struct sockaddr_in *, int, int);
static struct rpc_program mnt_program;
struct mnt_fhstatus {
@@ -36,14 +35,21 @@
struct nfs_fh * fh;
};
-/*
- * Obtain an NFS file handle for the given host and path
+/**
+ * nfs_mount - Obtain an NFS file handle for the given host and path
+ * @addr: pointer to server's address
+ * @len: size of server's address
+ * @hostname: name of server host, or NULL
+ * @path: pointer to string containing export path to mount
+ * @version: mount version to use for this request
+ * @protocol: transport protocol to use for thie request
+ * @fh: pointer to location to place returned file handle
+ *
+ * Uses default timeout parameters specified by underlying transport.
*/
-int
-nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
- int version, int protocol)
+int nfs_mount(struct sockaddr *addr, size_t len, char *hostname, char *path,
+ int version, int protocol, struct nfs_fh *fh)
{
- struct rpc_clnt *mnt_clnt;
struct mnt_fhstatus result = {
.fh = fh
};
@@ -51,12 +57,23 @@
.rpc_argp = path,
.rpc_resp = &result,
};
+ struct rpc_create_args args = {
+ .protocol = protocol,
+ .address = addr,
+ .addrsize = len,
+ .servername = hostname,
+ .program = &mnt_program,
+ .version = version,
+ .authflavor = RPC_AUTH_UNIX,
+ .flags = RPC_CLNT_CREATE_INTR,
+ };
+ struct rpc_clnt *mnt_clnt;
int status;
- dprintk("NFS: nfs_mount(%08x:%s)\n",
- (unsigned)ntohl(addr->sin_addr.s_addr), path);
+ dprintk("NFS: sending MNT request for %s:%s\n",
+ (hostname ? hostname : "server"), path);
- mnt_clnt = mnt_create(addr, version, protocol);
+ mnt_clnt = rpc_create(&args);
if (IS_ERR(mnt_clnt))
return PTR_ERR(mnt_clnt);
@@ -70,22 +87,6 @@
return status < 0? status : (result.status? -EACCES : 0);
}
-static struct rpc_clnt *mnt_create(struct sockaddr_in *srvaddr, int version,
- int protocol)
-{
- struct rpc_create_args args = {
- .protocol = protocol,
- .address = (struct sockaddr *)srvaddr,
- .addrsize = sizeof(*srvaddr),
- .program = &mnt_program,
- .version = version,
- .authflavor = RPC_AUTH_UNIX,
- .flags = RPC_CLNT_CREATE_INTR,
- };
-
- return rpc_create(&args);
-}
-
/*
* XDR encode/decode functions for MOUNT
*/
diff --git a/fs/nfs/nfsroot.c b/fs/nfs/nfsroot.c
index f0db470..3490322 100644
--- a/fs/nfs/nfsroot.c
+++ b/fs/nfs/nfsroot.c
@@ -496,7 +496,8 @@
NFS_MNT3_VERSION : NFS_MNT_VERSION;
set_sockaddr(&sin, servaddr, htons(mount_port));
- status = nfsroot_mount(&sin, nfs_path, &fh, version, protocol);
+ status = nfs_mount((struct sockaddr *) &sin, sizeof(sin), NULL,
+ nfs_path, version, protocol, &fh);
if (status < 0)
printk(KERN_ERR "Root-NFS: Server returned error %d "
"while mounting %s\n", status, nfs_path);
