2 * In-kernel MOUNT protocol client
4 * Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de>
7 #include <linux/types.h>
8 #include <linux/socket.h>
9 #include <linux/kernel.h>
10 #include <linux/errno.h>
11 #include <linux/uio.h>
12 #include <linux/net.h>
14 #include <linux/sunrpc/clnt.h>
15 #include <linux/sunrpc/sched.h>
16 #include <linux/nfs_fs.h>
20 # define NFSDBG_FACILITY NFSDBG_MOUNT
24 * Defined by RFC 1094, section A.5
31 MOUNTPROC_UMNTALL = 4,
36 * Defined by RFC 1813, section 5.2
43 MOUNTPROC3_UMNTALL = 4,
44 MOUNTPROC3_EXPORT = 5,
47 static struct rpc_program mnt_program;
55 * nfs_mount - Obtain an NFS file handle for the given host and path
56 * @info: pointer to mount request arguments
58 * Uses default timeout parameters specified by underlying transport.
60 int nfs_mount(struct nfs_mount_request *info)
62 struct mnt_fhstatus result = {
65 struct rpc_message msg = {
66 .rpc_argp = info->dirpath,
69 struct rpc_create_args args = {
70 .protocol = info->protocol,
72 .addrsize = info->salen,
73 .servername = info->hostname,
74 .program = &mnt_program,
75 .version = info->version,
76 .authflavor = RPC_AUTH_UNIX,
78 struct rpc_clnt *mnt_clnt;
81 dprintk("NFS: sending MNT request for %s:%s\n",
82 (info->hostname ? info->hostname : "server"),
86 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
88 mnt_clnt = rpc_create(&args);
92 if (info->version == NFS_MNT3_VERSION)
93 msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT];
95 msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC_MNT];
97 status = rpc_call_sync(mnt_clnt, &msg, 0);
98 rpc_shutdown_client(mnt_clnt);
102 if (result.status != 0)
105 dprintk("NFS: MNT request succeeded\n");
112 status = PTR_ERR(mnt_clnt);
113 dprintk("NFS: failed to create RPC client, status=%d\n", status);
117 dprintk("NFS: failed to start MNT request, status=%d\n", status);
121 dprintk("NFS: MNT server returned result %d\n", result.status);
122 status = nfs_stat_to_errno(result.status);
127 * XDR encode/decode functions for MOUNT
129 static int xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p,
132 p = xdr_encode_string(p, path);
134 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
138 static int xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p,
139 struct mnt_fhstatus *res)
141 struct nfs_fh *fh = res->fh;
143 if ((res->status = ntohl(*p++)) == 0) {
144 fh->size = NFS2_FHSIZE;
145 memcpy(fh->data, p, NFS2_FHSIZE);
150 static int xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p,
151 struct mnt_fhstatus *res)
153 struct nfs_fh *fh = res->fh;
156 if ((res->status = ntohl(*p++)) == 0) {
158 if (size <= NFS3_FHSIZE && size != 0) {
160 memcpy(fh->data, p, size);
162 res->status = -EBADHANDLE;
167 #define MNT_dirpath_sz (1 + 256)
168 #define MNT_fhstatus_sz (1 + 8)
169 #define MNT_fhstatus3_sz (1 + 16)
171 static struct rpc_procinfo mnt_procedures[] = {
173 .p_proc = MOUNTPROC_MNT,
174 .p_encode = (kxdrproc_t) xdr_encode_dirpath,
175 .p_decode = (kxdrproc_t) xdr_decode_fhstatus,
176 .p_arglen = MNT_dirpath_sz,
177 .p_replen = MNT_fhstatus_sz,
178 .p_statidx = MOUNTPROC_MNT,
183 static struct rpc_procinfo mnt3_procedures[] = {
185 .p_proc = MOUNTPROC3_MNT,
186 .p_encode = (kxdrproc_t) xdr_encode_dirpath,
187 .p_decode = (kxdrproc_t) xdr_decode_fhstatus3,
188 .p_arglen = MNT_dirpath_sz,
189 .p_replen = MNT_fhstatus3_sz,
190 .p_statidx = MOUNTPROC3_MNT,
196 static struct rpc_version mnt_version1 = {
199 .procs = mnt_procedures,
202 static struct rpc_version mnt_version3 = {
205 .procs = mnt3_procedures,
208 static struct rpc_version *mnt_version[] = {
215 static struct rpc_stat mnt_stats;
217 static struct rpc_program mnt_program = {
219 .number = NFS_MNT_PROGRAM,
220 .nrvers = ARRAY_SIZE(mnt_version),
221 .version = mnt_version,