Import of Linux/MIPS 2.1.36

1 files changed, 141 insertions, 0 deletions

diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c
new file mode 100644
index 000000000..81da8f996
--- /dev/null
+++ b/fs/nfs/mount_clnt.c
@@ -0,0 +1,141 @@
+/*
+ * linux/fs/nfs/mount_clnt.c
+ *
+ * MOUNT client to support NFSroot.
+ *
+ * Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/uio.h>
+#include <linux/net.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/xprt.h>
+#include <linux/sunrpc/sched.h>
+#include <linux/nfs_fs.h>
+
+#ifdef RPC_DEBUG
+# define NFSDBG_FACILITY	NFSDBG_ROOT
+#endif
+
+/*
+#define MOUNT_PROGRAM		100005
+#define MOUNT_VERSION		1
+#define MOUNT_MNT		1
+#define MOUNT_UMNT		3
+ */
+
+static struct rpc_clnt *	mnt_create(char *, struct sockaddr_in *);
+extern struct rpc_program	mnt_program;
+
+struct mnt_fhstatus {
+	unsigned int		status;
+	struct nfs_fh *		fh;
+};
+
+/*
+ * Obtain an NFS file handle for the given host and path
+ */
+int
+nfs_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh)
+{
+	struct rpc_clnt		*mnt_clnt;
+	struct mnt_fhstatus	result = { 0, fh };
+	char			hostname[32];
+	int			status;
+
+	dprintk("NFS:      nfs_mount(%08x:%s)\n",
+			(unsigned)ntohl(addr->sin_addr.s_addr), path);
+
+	strcpy(hostname, in_ntoa(addr->sin_addr.s_addr));
+	if (!(mnt_clnt = mnt_create(hostname, addr)))
+		return -EACCES;
+
+	status = rpc_call(mnt_clnt, NFS_MNTPROC_MNT, path, &result, 0);
+	return status < 0? status : (result.status? -EACCES : 0);
+}
+
+static struct rpc_clnt *
+mnt_create(char *hostname, struct sockaddr_in *srvaddr)
+{
+	struct rpc_xprt	*xprt;
+	struct rpc_clnt	*clnt;
+
+	if (!(xprt = xprt_create_proto(IPPROTO_UDP, srvaddr, NULL)))
+		return NULL;
+
+	clnt = rpc_create_client(xprt, hostname,
+				&mnt_program, NFS_MNT_VERSION,
+				RPC_AUTH_NULL);
+	if (!clnt) {
+		xprt_destroy(xprt);
+	} else {
+		clnt->cl_softrtry = 1;
+		clnt->cl_chatty   = 1;
+		clnt->cl_oneshot  = 1;
+	}
+	return clnt;
+}
+
+/*
+ * XDR encode/decode functions for MOUNT
+ */
+static int
+xdr_error(struct rpc_rqst *req, u32 *p, void *dummy)
+{
+	return -EIO;
+}
+
+static int
+xdr_encode_dirpath(struct rpc_rqst *req, u32 *p, const char *path)
+{
+	p = xdr_encode_string(p, path);
+
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+	return 0;
+}
+
+static int
+xdr_decode_fhstatus(struct rpc_rqst *req, u32 *p, struct mnt_fhstatus *res)
+{
+	if ((res->status = ntohl(*p++)) == 0)
+		memcpy(res->fh, p, sizeof(*res->fh));
+	return 0;
+}
+
+#define MNT_dirpath_sz		(1 + 256)
+#define MNT_fhstatus_sz		(1 + 8)
+
+static struct rpc_procinfo	mnt_procedures[2] = {
+	{ "mnt_null",
+		(kxdrproc_t) xdr_error,	
+		(kxdrproc_t) xdr_error,	0, 0 },
+	{ "mnt_mount",
+		(kxdrproc_t) xdr_encode_dirpath,	
+		(kxdrproc_t) xdr_decode_fhstatus,
+		MNT_dirpath_sz, MNT_fhstatus_sz },
+};
+
+static struct rpc_version	mnt_version1 = {
+	1, 2, mnt_procedures
+};
+
+static struct rpc_version *	mnt_version[] = {
+	NULL,
+	&mnt_version1,
+};
+
+static struct rpc_stat		mnt_stats;
+
+struct rpc_program	mnt_program = {
+	"mount",
+	NFS_MNT_PROGRAM,
+	sizeof(mnt_version)/sizeof(mnt_version[0]),
+	mnt_version,
+	&mnt_stats,
+};