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-rw-r--r--fs/nfs/mount_clnt.c169
1 files changed, 90 insertions, 79 deletions
diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c
index ca5a266a3140..8afd9f7e7a97 100644
--- a/fs/nfs/mount_clnt.c
+++ b/fs/nfs/mount_clnt.c
@@ -1,7 +1,5 @@
1/* 1/*
2 * linux/fs/nfs/mount_clnt.c 2 * In-kernel MOUNT protocol client
3 *
4 * MOUNT client to support NFSroot.
5 * 3 *
6 * Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de> 4 * Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de>
7 */ 5 */
@@ -18,33 +16,31 @@
18#include <linux/nfs_fs.h> 16#include <linux/nfs_fs.h>
19 17
20#ifdef RPC_DEBUG 18#ifdef RPC_DEBUG
21# define NFSDBG_FACILITY NFSDBG_ROOT 19# define NFSDBG_FACILITY NFSDBG_MOUNT
22#endif 20#endif
23 21
24/*
25#define MOUNT_PROGRAM 100005
26#define MOUNT_VERSION 1
27#define MOUNT_MNT 1
28#define MOUNT_UMNT 3
29 */
30
31static struct rpc_clnt * mnt_create(char *, struct sockaddr_in *,
32 int, int);
33static struct rpc_program mnt_program; 22static struct rpc_program mnt_program;
34 23
35struct mnt_fhstatus { 24struct mnt_fhstatus {
36 unsigned int status; 25 u32 status;
37 struct nfs_fh * fh; 26 struct nfs_fh *fh;
38}; 27};
39 28
40/* 29/**
41 * Obtain an NFS file handle for the given host and path 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
38 *
39 * Uses default timeout parameters specified by underlying transport.
42 */ 40 */
43int 41int nfs_mount(struct sockaddr *addr, size_t len, char *hostname, char *path,
44nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh, 42 int version, int protocol, struct nfs_fh *fh)
45 int version, int protocol)
46{ 43{
47 struct rpc_clnt *mnt_clnt;
48 struct mnt_fhstatus result = { 44 struct mnt_fhstatus result = {
49 .fh = fh 45 .fh = fh
50 }; 46 };
@@ -52,16 +48,25 @@ nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
52 .rpc_argp = path, 48 .rpc_argp = path,
53 .rpc_resp = &result, 49 .rpc_resp = &result,
54 }; 50 };
55 char hostname[32]; 51 struct rpc_create_args args = {
52 .protocol = protocol,
53 .address = addr,
54 .addrsize = len,
55 .servername = hostname,
56 .program = &mnt_program,
57 .version = version,
58 .authflavor = RPC_AUTH_UNIX,
59 .flags = RPC_CLNT_CREATE_INTR,
60 };
61 struct rpc_clnt *mnt_clnt;
56 int status; 62 int status;
57 63
58 dprintk("NFS: nfs_mount(%08x:%s)\n", 64 dprintk("NFS: sending MNT request for %s:%s\n",
59 (unsigned)ntohl(addr->sin_addr.s_addr), path); 65 (hostname ? hostname : "server"), path);
60 66
61 sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(addr->sin_addr.s_addr)); 67 mnt_clnt = rpc_create(&args);
62 mnt_clnt = mnt_create(hostname, addr, version, protocol);
63 if (IS_ERR(mnt_clnt)) 68 if (IS_ERR(mnt_clnt))
64 return PTR_ERR(mnt_clnt); 69 goto out_clnt_err;
65 70
66 if (version == NFS_MNT3_VERSION) 71 if (version == NFS_MNT3_VERSION)
67 msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT]; 72 msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT];
@@ -69,33 +74,39 @@ nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
69 msg.rpc_proc = &mnt_clnt->cl_procinfo[MNTPROC_MNT]; 74 msg.rpc_proc = &mnt_clnt->cl_procinfo[MNTPROC_MNT];
70 75
71 status = rpc_call_sync(mnt_clnt, &msg, 0); 76 status = rpc_call_sync(mnt_clnt, &msg, 0);
72 return status < 0? status : (result.status? -EACCES : 0); 77 rpc_shutdown_client(mnt_clnt);
73}
74 78
75static struct rpc_clnt * 79 if (status < 0)
76mnt_create(char *hostname, struct sockaddr_in *srvaddr, int version, 80 goto out_call_err;
77 int protocol) 81 if (result.status != 0)
78{ 82 goto out_mnt_err;
79 struct rpc_create_args args = { 83
80 .protocol = protocol, 84 dprintk("NFS: MNT request succeeded\n");
81 .address = (struct sockaddr *)srvaddr, 85 status = 0;
82 .addrsize = sizeof(*srvaddr), 86
83 .servername = hostname, 87out:
84 .program = &mnt_program, 88 return status;
85 .version = version, 89
86 .authflavor = RPC_AUTH_UNIX, 90out_clnt_err:
87 .flags = (RPC_CLNT_CREATE_ONESHOT | 91 status = PTR_ERR(mnt_clnt);
88 RPC_CLNT_CREATE_INTR), 92 dprintk("NFS: failed to create RPC client, status=%d\n", status);
89 }; 93 goto out;
94
95out_call_err:
96 dprintk("NFS: failed to start MNT request, status=%d\n", status);
97 goto out;
90 98
91 return rpc_create(&args); 99out_mnt_err:
100 dprintk("NFS: MNT server returned result %d\n", result.status);
101 status = -EACCES;
102 goto out;
92} 103}
93 104
94/* 105/*
95 * XDR encode/decode functions for MOUNT 106 * XDR encode/decode functions for MOUNT
96 */ 107 */
97static int 108static int xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p,
98xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p, const char *path) 109 const char *path)
99{ 110{
100 p = xdr_encode_string(p, path); 111 p = xdr_encode_string(p, path);
101 112
@@ -103,8 +114,8 @@ xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p, const char *path)
103 return 0; 114 return 0;
104} 115}
105 116
106static int 117static int xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p,
107xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res) 118 struct mnt_fhstatus *res)
108{ 119{
109 struct nfs_fh *fh = res->fh; 120 struct nfs_fh *fh = res->fh;
110 121
@@ -115,8 +126,8 @@ xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
115 return 0; 126 return 0;
116} 127}
117 128
118static int 129static int xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p,
119xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res) 130 struct mnt_fhstatus *res)
120{ 131{
121 struct nfs_fh *fh = res->fh; 132 struct nfs_fh *fh = res->fh;
122 133
@@ -135,53 +146,53 @@ xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
135#define MNT_fhstatus_sz (1 + 8) 146#define MNT_fhstatus_sz (1 + 8)
136#define MNT_fhstatus3_sz (1 + 16) 147#define MNT_fhstatus3_sz (1 + 16)
137 148
138static struct rpc_procinfo mnt_procedures[] = { 149static struct rpc_procinfo mnt_procedures[] = {
139[MNTPROC_MNT] = { 150 [MNTPROC_MNT] = {
140 .p_proc = MNTPROC_MNT, 151 .p_proc = MNTPROC_MNT,
141 .p_encode = (kxdrproc_t) xdr_encode_dirpath, 152 .p_encode = (kxdrproc_t) xdr_encode_dirpath,
142 .p_decode = (kxdrproc_t) xdr_decode_fhstatus, 153 .p_decode = (kxdrproc_t) xdr_decode_fhstatus,
143 .p_arglen = MNT_dirpath_sz, 154 .p_arglen = MNT_dirpath_sz,
144 .p_replen = MNT_fhstatus_sz, 155 .p_replen = MNT_fhstatus_sz,
145 .p_statidx = MNTPROC_MNT, 156 .p_statidx = MNTPROC_MNT,
146 .p_name = "MOUNT", 157 .p_name = "MOUNT",
147 }, 158 },
148}; 159};
149 160
150static struct rpc_procinfo mnt3_procedures[] = { 161static struct rpc_procinfo mnt3_procedures[] = {
151[MOUNTPROC3_MNT] = { 162 [MOUNTPROC3_MNT] = {
152 .p_proc = MOUNTPROC3_MNT, 163 .p_proc = MOUNTPROC3_MNT,
153 .p_encode = (kxdrproc_t) xdr_encode_dirpath, 164 .p_encode = (kxdrproc_t) xdr_encode_dirpath,
154 .p_decode = (kxdrproc_t) xdr_decode_fhstatus3, 165 .p_decode = (kxdrproc_t) xdr_decode_fhstatus3,
155 .p_arglen = MNT_dirpath_sz, 166 .p_arglen = MNT_dirpath_sz,
156 .p_replen = MNT_fhstatus3_sz, 167 .p_replen = MNT_fhstatus3_sz,
157 .p_statidx = MOUNTPROC3_MNT, 168 .p_statidx = MOUNTPROC3_MNT,
158 .p_name = "MOUNT", 169 .p_name = "MOUNT",
159 }, 170 },
160}; 171};
161 172
162 173
163static struct rpc_version mnt_version1 = { 174static struct rpc_version mnt_version1 = {
164 .number = 1, 175 .number = 1,
165 .nrprocs = 2, 176 .nrprocs = 2,
166 .procs = mnt_procedures 177 .procs = mnt_procedures,
167}; 178};
168 179
169static struct rpc_version mnt_version3 = { 180static struct rpc_version mnt_version3 = {
170 .number = 3, 181 .number = 3,
171 .nrprocs = 2, 182 .nrprocs = 2,
172 .procs = mnt3_procedures 183 .procs = mnt3_procedures,
173}; 184};
174 185
175static struct rpc_version * mnt_version[] = { 186static struct rpc_version *mnt_version[] = {
176 NULL, 187 NULL,
177 &mnt_version1, 188 &mnt_version1,
178 NULL, 189 NULL,
179 &mnt_version3, 190 &mnt_version3,
180}; 191};
181 192
182static struct rpc_stat mnt_stats; 193static struct rpc_stat mnt_stats;
183 194
184static struct rpc_program mnt_program = { 195static struct rpc_program mnt_program = {
185 .name = "mount", 196 .name = "mount",
186 .number = NFS_MNT_PROGRAM, 197 .number = NFS_MNT_PROGRAM,
187 .nrvers = ARRAY_SIZE(mnt_version), 198 .nrvers = ARRAY_SIZE(mnt_version),
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-12 14:11:35 -0500