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>
19 # define NFSDBG_FACILITY NFSDBG_MOUNT
22 static struct rpc_program mnt_program;
30 * nfs_mount - Obtain an NFS file handle for the given host and path
31 * @addr: pointer to server's address
32 * @len: size of server's address
33 * @hostname: name of server host, or NULL
34 * @path: pointer to string containing export path to mount
35 * @version: mount version to use for this request
36 * @protocol: transport protocol to use for thie request
37 * @fh: pointer to location to place returned file handle
39 * Uses default timeout parameters specified by underlying transport.
41 int nfs_mount(struct sockaddr *addr, size_t len, char *hostname, char *path,
42 int version, int protocol, struct nfs_fh *fh)
44 struct mnt_fhstatus result = {
47 struct rpc_message msg = {
51 struct rpc_create_args args = {
55 .servername = hostname,
56 .program = &mnt_program,
58 .authflavor = RPC_AUTH_UNIX,
59 .flags = RPC_CLNT_CREATE_INTR,
61 struct rpc_clnt *mnt_clnt;
64 dprintk("NFS: sending MNT request for %s:%s\n",
65 (hostname ? hostname : "server"), path);
67 mnt_clnt = rpc_create(&args);
69 return PTR_ERR(mnt_clnt);
71 if (version == NFS_MNT3_VERSION)
72 msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT];
74 msg.rpc_proc = &mnt_clnt->cl_procinfo[MNTPROC_MNT];
76 status = rpc_call_sync(mnt_clnt, &msg, 0);
77 rpc_shutdown_client(mnt_clnt);
78 return status < 0? status : (result.status? -EACCES : 0);
82 * XDR encode/decode functions for MOUNT
84 static int xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p,
87 p = xdr_encode_string(p, path);
89 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
93 static int xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p,
94 struct mnt_fhstatus *res)
96 struct nfs_fh *fh = res->fh;
98 if ((res->status = ntohl(*p++)) == 0) {
99 fh->size = NFS2_FHSIZE;
100 memcpy(fh->data, p, NFS2_FHSIZE);
105 static int xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p,
106 struct mnt_fhstatus *res)
108 struct nfs_fh *fh = res->fh;
110 if ((res->status = ntohl(*p++)) == 0) {
111 int size = ntohl(*p++);
112 if (size <= NFS3_FHSIZE) {
114 memcpy(fh->data, p, size);
116 res->status = -EBADHANDLE;
121 #define MNT_dirpath_sz (1 + 256)
122 #define MNT_fhstatus_sz (1 + 8)
123 #define MNT_fhstatus3_sz (1 + 16)
125 static struct rpc_procinfo mnt_procedures[] = {
127 .p_proc = MNTPROC_MNT,
128 .p_encode = (kxdrproc_t) xdr_encode_dirpath,
129 .p_decode = (kxdrproc_t) xdr_decode_fhstatus,
130 .p_arglen = MNT_dirpath_sz,
131 .p_replen = MNT_fhstatus_sz,
132 .p_statidx = MNTPROC_MNT,
137 static struct rpc_procinfo mnt3_procedures[] = {
139 .p_proc = MOUNTPROC3_MNT,
140 .p_encode = (kxdrproc_t) xdr_encode_dirpath,
141 .p_decode = (kxdrproc_t) xdr_decode_fhstatus3,
142 .p_arglen = MNT_dirpath_sz,
143 .p_replen = MNT_fhstatus3_sz,
144 .p_statidx = MOUNTPROC3_MNT,
150 static struct rpc_version mnt_version1 = {
153 .procs = mnt_procedures,
156 static struct rpc_version mnt_version3 = {
159 .procs = mnt3_procedures,
162 static struct rpc_version *mnt_version[] = {
169 static struct rpc_stat mnt_stats;
171 static struct rpc_program mnt_program = {
173 .number = NFS_MNT_PROGRAM,
174 .nrvers = ARRAY_SIZE(mnt_version),
175 .version = mnt_version,