1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* linux/fs/nfs/mount_clnt.c
*
* MOUNT client to support NFSroot.
*
* Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de>
*/
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/uio.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/xprt.h>
#include <linux/sunrpc/sched.h>
#include <linux/nfs_fs.h>
#ifdef RPC_DEBUG
# define NFSDBG_FACILITY NFSDBG_ROOT
#endif
/*
#define MOUNT_PROGRAM 100005
#define MOUNT_VERSION 1
#define MOUNT_MNT 1
#define MOUNT_UMNT 3
*/
static struct rpc_clnt * mnt_create(char *, struct sockaddr_in *,
int, int);
static struct rpc_program mnt_program;
struct mnt_fhstatus {
unsigned int status;
struct nfs_fh * fh;
};
/*
* Obtain an NFS file handle for the given host and path
*/
int
nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
int version, int protocol)
{
struct rpc_clnt *mnt_clnt;
struct mnt_fhstatus result = {
.fh = fh
};
char hostname[32];
int status;
int call;
dprintk("NFS: nfs_mount(%08x:%s)\n",
(unsigned)ntohl(addr->sin_addr.s_addr), path);
sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(addr->sin_addr.s_addr));
mnt_clnt = mnt_create(hostname, addr, version, protocol);
if (IS_ERR(mnt_clnt))
return PTR_ERR(mnt_clnt);
call = (version == NFS_MNT3_VERSION) ? MOUNTPROC3_MNT : MNTPROC_MNT;
status = rpc_call(mnt_clnt, call, path, &result, 0);
return status < 0? status : (result.status? -EACCES : 0);
}
static struct rpc_clnt *
mnt_create(char *hostname, struct sockaddr_in *srvaddr, int version,
int protocol)
{
struct rpc_xprt *xprt;
struct rpc_clnt *clnt;
xprt = xprt_create_proto(protocol, srvaddr, NULL);
if (IS_ERR(xprt))
return (struct rpc_clnt *)xprt;
clnt = rpc_create_client(xprt, hostname,
&mnt_program, version,
RPC_AUTH_UNIX);
if (!IS_ERR(clnt)) {
clnt->cl_softrtry = 1;
clnt->cl_oneshot = 1;
clnt->cl_intr = 1;
}
return clnt;
}
/*
* XDR encode/decode functions for MOUNT
*/
static int
xdr_encode_dirpath(struct rpc_rqst *req, u32 *p, const char *path)
{
p = xdr_encode_string(p, path);
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
return 0;
}
static int
xdr_decode_fhstatus(struct rpc_rqst *req, u32 *p, struct mnt_fhstatus *res)
{
struct nfs_fh *fh = res->fh;
if ((res->status = ntohl(*p++)) == 0) {
fh->size = NFS2_FHSIZE;
memcpy(fh->data, p, NFS2_FHSIZE);
}
return 0;
}
static int
xdr_decode_fhstatus3(struct rpc_rqst *req, u32 *p, struct mnt_fhstatus *res)
{
struct nfs_fh *fh = res->fh;
if ((res->status = ntohl(*p++)) == 0) {
int size = ntohl(*p++);
if (size <= NFS3_FHSIZE) {
fh->size = size;
memcpy(fh->data, p, size);
} else
res->status = -EBADHANDLE;
}
return 0;
}
#define MNT_dirpath_sz (1 + 256)
#define MNT_fhstatus_sz (1 + 8)
static struct rpc_procinfo mnt_procedures[] = {
[MNTPROC_MNT] = {
.p_proc = MNTPROC_MNT,
.p_encode = (kxdrproc_t) xdr_encode_dirpath,
.p_decode = (kxdrproc_t) xdr_decode_fhstatus,
.p_bufsiz = MNT_dirpath_sz << 2,
},
};
static struct rpc_procinfo mnt3_procedures[] = {
[MOUNTPROC3_MNT] = {
.p_proc = MOUNTPROC3_MNT,
.p_encode = (kxdrproc_t) xdr_encode_dirpath,
.p_decode = (kxdrproc_t) xdr_decode_fhstatus3,
.p_bufsiz = MNT_dirpath_sz << 2,
},
};
static struct rpc_version mnt_version1 = {
.number = 1,
.nrprocs = 2,
.procs = mnt_procedures
};
static struct rpc_version mnt_version3 = {
.number = 3,
.nrprocs = 2,
.procs = mnt3_procedures
};
static struct rpc_version * mnt_version[] = {
NULL,
&mnt_version1,
NULL,
&mnt_version3,
};
static struct rpc_stat mnt_stats;
static struct rpc_program mnt_program = {
.name = "mount",
.number = NFS_MNT_PROGRAM,
.nrvers = sizeof(mnt_version)/sizeof(mnt_version[0]),
.version = mnt_version,
.stats = &mnt_stats,
};
|
