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/sched.h>
18 #include <linux/nfs_fs.h>
21 # define NFSDBG_FACILITY NFSDBG_ROOT
25 #define MOUNT_PROGRAM 100005
26 #define MOUNT_VERSION 1
31 static struct rpc_clnt * mnt_create(struct sockaddr_in *, int, int);
32 static struct rpc_program mnt_program;
40 * Obtain an NFS file handle for the given host and path
43 nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
44 int version, int protocol)
46 struct rpc_clnt *mnt_clnt;
47 struct mnt_fhstatus result = {
50 struct rpc_message msg = {
56 dprintk("NFS: nfs_mount(%08x:%s)\n",
57 (unsigned)ntohl(addr->sin_addr.s_addr), path);
59 mnt_clnt = mnt_create(addr, version, protocol);
61 return PTR_ERR(mnt_clnt);
63 if (version == NFS_MNT3_VERSION)
64 msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT];
66 msg.rpc_proc = &mnt_clnt->cl_procinfo[MNTPROC_MNT];
68 status = rpc_call_sync(mnt_clnt, &msg, 0);
69 rpc_shutdown_client(mnt_clnt);
70 return status < 0? status : (result.status? -EACCES : 0);
73 static struct rpc_clnt *mnt_create(struct sockaddr_in *srvaddr, int version,
76 struct rpc_create_args args = {
78 .address = (struct sockaddr *)srvaddr,
79 .addrsize = sizeof(*srvaddr),
80 .program = &mnt_program,
82 .authflavor = RPC_AUTH_UNIX,
83 .flags = RPC_CLNT_CREATE_INTR,
86 return rpc_create(&args);
90 * XDR encode/decode functions for MOUNT
93 xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p, const char *path)
95 p = xdr_encode_string(p, path);
97 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
102 xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
104 struct nfs_fh *fh = res->fh;
106 if ((res->status = ntohl(*p++)) == 0) {
107 fh->size = NFS2_FHSIZE;
108 memcpy(fh->data, p, NFS2_FHSIZE);
114 xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
116 struct nfs_fh *fh = res->fh;
118 if ((res->status = ntohl(*p++)) == 0) {
119 int size = ntohl(*p++);
120 if (size <= NFS3_FHSIZE) {
122 memcpy(fh->data, p, size);
124 res->status = -EBADHANDLE;
129 #define MNT_dirpath_sz (1 + 256)
130 #define MNT_fhstatus_sz (1 + 8)
131 #define MNT_fhstatus3_sz (1 + 16)
133 static struct rpc_procinfo mnt_procedures[] = {
135 .p_proc = MNTPROC_MNT,
136 .p_encode = (kxdrproc_t) xdr_encode_dirpath,
137 .p_decode = (kxdrproc_t) xdr_decode_fhstatus,
138 .p_arglen = MNT_dirpath_sz,
139 .p_replen = MNT_fhstatus_sz,
140 .p_statidx = MNTPROC_MNT,
145 static struct rpc_procinfo mnt3_procedures[] = {
147 .p_proc = MOUNTPROC3_MNT,
148 .p_encode = (kxdrproc_t) xdr_encode_dirpath,
149 .p_decode = (kxdrproc_t) xdr_decode_fhstatus3,
150 .p_arglen = MNT_dirpath_sz,
151 .p_replen = MNT_fhstatus3_sz,
152 .p_statidx = MOUNTPROC3_MNT,
158 static struct rpc_version mnt_version1 = {
161 .procs = mnt_procedures
164 static struct rpc_version mnt_version3 = {
167 .procs = mnt3_procedures
170 static struct rpc_version * mnt_version[] = {
177 static struct rpc_stat mnt_stats;
179 static struct rpc_program mnt_program = {
181 .number = NFS_MNT_PROGRAM,
182 .nrvers = ARRAY_SIZE(mnt_version),
183 .version = mnt_version,