2 * linux/fs/nfs/mount_clnt.c
4 * MOUNT client to support NFSroot.
6 * Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de>
9 #include <linux/types.h>
10 #include <linux/socket.h>
11 #include <linux/kernel.h>
12 #include <linux/errno.h>
13 #include <linux/uio.h>
14 #include <linux/net.h>
16 #include <linux/sunrpc/clnt.h>
17 #include <linux/sunrpc/xprt.h>
18 #include <linux/sunrpc/sched.h>
19 #include <linux/nfs_fs.h>
22 # define NFSDBG_FACILITY NFSDBG_ROOT
26 #define MOUNT_PROGRAM 100005
27 #define MOUNT_VERSION 1
32 static struct rpc_clnt * mnt_create(char *, struct sockaddr_in *,
34 struct rpc_program mnt_program;
42 * Obtain an NFS file handle for the given host and path
45 nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
46 int version, int protocol)
48 struct rpc_clnt *mnt_clnt;
49 struct mnt_fhstatus result = { 0, fh };
54 dprintk("NFS: nfs_mount(%08x:%s)\n",
55 (unsigned)ntohl(addr->sin_addr.s_addr), path);
57 sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(addr->sin_addr.s_addr));
58 if (!(mnt_clnt = mnt_create(hostname, addr, version, protocol)))
61 call = (version == NFS_MNT3_VERSION)? MOUNTPROC3_MNT : MNTPROC_MNT;
62 status = rpc_call(mnt_clnt, call, path, &result, 0);
63 return status < 0? status : (result.status? -EACCES : 0);
66 static struct rpc_clnt *
67 mnt_create(char *hostname, struct sockaddr_in *srvaddr, int version,
70 struct rpc_xprt *xprt;
71 struct rpc_clnt *clnt;
73 if (!(xprt = xprt_create_proto(protocol, srvaddr, NULL)))
76 clnt = rpc_create_client(xprt, hostname,
77 &mnt_program, version,
82 clnt->cl_softrtry = 1;
91 * XDR encode/decode functions for MOUNT
94 xdr_error(struct rpc_rqst *req, u32 *p, void *dummy)
100 xdr_encode_dirpath(struct rpc_rqst *req, u32 *p, const char *path)
102 p = xdr_encode_string(p, path);
104 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
109 xdr_decode_fhstatus(struct rpc_rqst *req, u32 *p, struct mnt_fhstatus *res)
111 struct nfs_fh *fh = res->fh;
113 memset((void *)fh, 0, sizeof(*fh));
114 if ((res->status = ntohl(*p++)) == 0) {
115 fh->size = NFS2_FHSIZE;
116 memcpy(fh->data, p, NFS2_FHSIZE);
122 xdr_decode_fhstatus3(struct rpc_rqst *req, u32 *p, struct mnt_fhstatus *res)
124 struct nfs_fh *fh = res->fh;
126 memset((void *)fh, 0, sizeof(*fh));
127 if ((res->status = ntohl(*p++)) == 0) {
128 int size = ntohl(*p++);
129 if (size <= NFS3_FHSIZE) {
131 memcpy(fh->data, p, size);
133 res->status = -EBADHANDLE;
138 #define MNT_dirpath_sz (1 + 256)
139 #define MNT_fhstatus_sz (1 + 8)
141 static struct rpc_procinfo mnt_procedures[2] = {
143 (kxdrproc_t) xdr_error,
144 (kxdrproc_t) xdr_error, 0, 0 },
146 (kxdrproc_t) xdr_encode_dirpath,
147 (kxdrproc_t) xdr_decode_fhstatus,
148 MNT_dirpath_sz << 2, 0 },
151 static struct rpc_procinfo mnt3_procedures[2] = {
153 (kxdrproc_t) xdr_error,
154 (kxdrproc_t) xdr_error, 0, 0 },
156 (kxdrproc_t) xdr_encode_dirpath,
157 (kxdrproc_t) xdr_decode_fhstatus3,
158 MNT_dirpath_sz << 2, 0 },
162 static struct rpc_version mnt_version1 = {
166 static struct rpc_version mnt_version3 = {
167 3, 2, mnt3_procedures
170 static struct rpc_version * mnt_version[] = {
177 static struct rpc_stat mnt_stats;
179 struct rpc_program mnt_program = {
182 sizeof(mnt_version)/sizeof(mnt_version[0]),