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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>
15#include <linux/in.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>
20
21#ifdef RPC_DEBUG
22# define NFSDBG_FACILITY NFSDBG_ROOT
23#endif
24
25
26
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29
30
31
32static struct rpc_clnt * mnt_create(char *, struct sockaddr_in *,
33 int, int);
34struct rpc_program mnt_program;
35
36struct mnt_fhstatus {
37 unsigned int status;
38 struct nfs_fh * fh;
39};
40
41
42
43
44int
45nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
46 int version, int protocol)
47{
48 struct rpc_clnt *mnt_clnt;
49 struct mnt_fhstatus result = { 0, fh };
50 char hostname[32];
51 int status;
52 int call;
53
54 dprintk("NFS: nfs_mount(%08x:%s)\n",
55 (unsigned)ntohl(addr->sin_addr.s_addr), path);
56
57 sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(addr->sin_addr.s_addr));
58 if (!(mnt_clnt = mnt_create(hostname, addr, version, protocol)))
59 return -EACCES;
60
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);
64}
65
66static struct rpc_clnt *
67mnt_create(char *hostname, struct sockaddr_in *srvaddr, int version,
68 int protocol)
69{
70 struct rpc_xprt *xprt;
71 struct rpc_clnt *clnt;
72
73 if (!(xprt = xprt_create_proto(protocol, srvaddr, NULL)))
74 return NULL;
75
76 clnt = rpc_create_client(xprt, hostname,
77 &mnt_program, version,
78 RPC_AUTH_NULL);
79 if (!clnt) {
80 xprt_destroy(xprt);
81 } else {
82 clnt->cl_softrtry = 1;
83 clnt->cl_chatty = 1;
84 clnt->cl_oneshot = 1;
85 clnt->cl_intr = 1;
86 }
87 return clnt;
88}
89
90
91
92
93static int
94xdr_error(struct rpc_rqst *req, u32 *p, void *dummy)
95{
96 return -EIO;
97}
98
99static int
100xdr_encode_dirpath(struct rpc_rqst *req, u32 *p, const char *path)
101{
102 p = xdr_encode_string(p, path);
103
104 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
105 return 0;
106}
107
108static int
109xdr_decode_fhstatus(struct rpc_rqst *req, u32 *p, struct mnt_fhstatus *res)
110{
111 struct nfs_fh *fh = res->fh;
112
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);
117 }
118 return 0;
119}
120
121static int
122xdr_decode_fhstatus3(struct rpc_rqst *req, u32 *p, struct mnt_fhstatus *res)
123{
124 struct nfs_fh *fh = res->fh;
125
126 memset((void *)fh, 0, sizeof(*fh));
127 if ((res->status = ntohl(*p++)) == 0) {
128 int size = ntohl(*p++);
129 if (size <= NFS3_FHSIZE) {
130 fh->size = size;
131 memcpy(fh->data, p, size);
132 } else
133 res->status = -EBADHANDLE;
134 }
135 return 0;
136}
137
138#define MNT_dirpath_sz (1 + 256)
139#define MNT_fhstatus_sz (1 + 8)
140
141static struct rpc_procinfo mnt_procedures[2] = {
142 { "mnt_null",
143 (kxdrproc_t) xdr_error,
144 (kxdrproc_t) xdr_error, 0, 0 },
145 { "mnt_mount",
146 (kxdrproc_t) xdr_encode_dirpath,
147 (kxdrproc_t) xdr_decode_fhstatus,
148 MNT_dirpath_sz << 2, 0 },
149};
150
151static struct rpc_procinfo mnt3_procedures[2] = {
152 { "mnt3_null",
153 (kxdrproc_t) xdr_error,
154 (kxdrproc_t) xdr_error, 0, 0 },
155 { "mnt3_mount",
156 (kxdrproc_t) xdr_encode_dirpath,
157 (kxdrproc_t) xdr_decode_fhstatus3,
158 MNT_dirpath_sz << 2, 0 },
159};
160
161
162static struct rpc_version mnt_version1 = {
163 1, 2, mnt_procedures
164};
165
166static struct rpc_version mnt_version3 = {
167 3, 2, mnt3_procedures
168};
169
170static struct rpc_version * mnt_version[] = {
171 NULL,
172 &mnt_version1,
173 NULL,
174 &mnt_version3,
175};
176
177static struct rpc_stat mnt_stats;
178
179struct rpc_program mnt_program = {
180 "mount",
181 NFS_MNT_PROGRAM,
182 sizeof(mnt_version)/sizeof(mnt_version[0]),
183 mnt_version,
184 &mnt_stats,
185};
186
