1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 * linux/fs/nfs/fs_context.c 3 * linux/fs/nfs/fs_context.c
4 * 4 *
5 * Copyright (C) 1992 Rick Sladkey 5 * Copyright (C) 1992 Rick Sladkey
6 * Conversion to new mount api Copyright (C) D 6 * Conversion to new mount api Copyright (C) David Howells
7 * 7 *
8 * NFS mount handling. 8 * NFS mount handling.
9 * 9 *
10 * Split from fs/nfs/super.c by David Howells 10 * Split from fs/nfs/super.c by David Howells <dhowells@redhat.com>
11 */ 11 */
12 12
13 #include <linux/compat.h> 13 #include <linux/compat.h>
14 #include <linux/module.h> 14 #include <linux/module.h>
15 #include <linux/fs.h> 15 #include <linux/fs.h>
16 #include <linux/fs_context.h> 16 #include <linux/fs_context.h>
17 #include <linux/fs_parser.h> 17 #include <linux/fs_parser.h>
18 #include <linux/nfs_fs.h> 18 #include <linux/nfs_fs.h>
19 #include <linux/nfs_mount.h> 19 #include <linux/nfs_mount.h>
20 #include <linux/nfs4_mount.h> 20 #include <linux/nfs4_mount.h>
21 21
22 #include <net/handshake.h> 22 #include <net/handshake.h>
23 23
24 #include "nfs.h" 24 #include "nfs.h"
25 #include "internal.h" 25 #include "internal.h"
26 26
27 #include "nfstrace.h" 27 #include "nfstrace.h"
28 28
29 #define NFSDBG_FACILITY NFSDBG_MOUNT 29 #define NFSDBG_FACILITY NFSDBG_MOUNT
30 30
31 #if IS_ENABLED(CONFIG_NFS_V3) 31 #if IS_ENABLED(CONFIG_NFS_V3)
32 #define NFS_DEFAULT_VERSION 3 32 #define NFS_DEFAULT_VERSION 3
33 #else 33 #else
34 #define NFS_DEFAULT_VERSION 2 34 #define NFS_DEFAULT_VERSION 2
35 #endif 35 #endif
36 36
37 #define NFS_MAX_CONNECTIONS 16 37 #define NFS_MAX_CONNECTIONS 16
38 38
39 enum nfs_param { 39 enum nfs_param {
40 Opt_ac, 40 Opt_ac,
41 Opt_acdirmax, 41 Opt_acdirmax,
42 Opt_acdirmin, 42 Opt_acdirmin,
43 Opt_acl, 43 Opt_acl,
44 Opt_acregmax, 44 Opt_acregmax,
45 Opt_acregmin, 45 Opt_acregmin,
46 Opt_actimeo, 46 Opt_actimeo,
47 Opt_addr, 47 Opt_addr,
48 Opt_bg, 48 Opt_bg,
49 Opt_bsize, 49 Opt_bsize,
50 Opt_clientaddr, 50 Opt_clientaddr,
51 Opt_cto, 51 Opt_cto,
52 Opt_alignwrite, <<
53 Opt_fg, 52 Opt_fg,
54 Opt_fscache, 53 Opt_fscache,
55 Opt_fscache_flag, 54 Opt_fscache_flag,
56 Opt_hard, 55 Opt_hard,
57 Opt_intr, 56 Opt_intr,
58 Opt_local_lock, 57 Opt_local_lock,
59 Opt_lock, 58 Opt_lock,
60 Opt_lookupcache, 59 Opt_lookupcache,
61 Opt_migration, 60 Opt_migration,
62 Opt_minorversion, 61 Opt_minorversion,
63 Opt_mountaddr, 62 Opt_mountaddr,
64 Opt_mounthost, 63 Opt_mounthost,
65 Opt_mountport, 64 Opt_mountport,
66 Opt_mountproto, 65 Opt_mountproto,
67 Opt_mountvers, 66 Opt_mountvers,
68 Opt_namelen, 67 Opt_namelen,
69 Opt_nconnect, 68 Opt_nconnect,
70 Opt_max_connect, 69 Opt_max_connect,
71 Opt_port, 70 Opt_port,
72 Opt_posix, 71 Opt_posix,
73 Opt_proto, 72 Opt_proto,
74 Opt_rdirplus, 73 Opt_rdirplus,
75 Opt_rdma, 74 Opt_rdma,
76 Opt_resvport, 75 Opt_resvport,
77 Opt_retrans, 76 Opt_retrans,
78 Opt_retry, 77 Opt_retry,
79 Opt_rsize, 78 Opt_rsize,
80 Opt_sec, 79 Opt_sec,
81 Opt_sharecache, 80 Opt_sharecache,
82 Opt_sloppy, 81 Opt_sloppy,
83 Opt_soft, 82 Opt_soft,
84 Opt_softerr, 83 Opt_softerr,
85 Opt_softreval, 84 Opt_softreval,
86 Opt_source, 85 Opt_source,
87 Opt_tcp, 86 Opt_tcp,
88 Opt_timeo, 87 Opt_timeo,
89 Opt_trunkdiscovery, 88 Opt_trunkdiscovery,
90 Opt_udp, 89 Opt_udp,
91 Opt_v, 90 Opt_v,
92 Opt_vers, 91 Opt_vers,
93 Opt_wsize, 92 Opt_wsize,
94 Opt_write, 93 Opt_write,
95 Opt_xprtsec, 94 Opt_xprtsec,
96 }; 95 };
97 96
98 enum { 97 enum {
99 Opt_local_lock_all, 98 Opt_local_lock_all,
100 Opt_local_lock_flock, 99 Opt_local_lock_flock,
101 Opt_local_lock_none, 100 Opt_local_lock_none,
102 Opt_local_lock_posix, 101 Opt_local_lock_posix,
103 }; 102 };
104 103
105 static const struct constant_table nfs_param_e 104 static const struct constant_table nfs_param_enums_local_lock[] = {
106 { "all", Opt_local_lock 105 { "all", Opt_local_lock_all },
107 { "flock", Opt_local_lock_flock } 106 { "flock", Opt_local_lock_flock },
108 { "posix", Opt_local_lock_posix } 107 { "posix", Opt_local_lock_posix },
109 { "none", Opt_local_lock 108 { "none", Opt_local_lock_none },
110 {} 109 {}
111 }; 110 };
112 111
113 enum { 112 enum {
114 Opt_lookupcache_all, 113 Opt_lookupcache_all,
115 Opt_lookupcache_none, 114 Opt_lookupcache_none,
116 Opt_lookupcache_positive, 115 Opt_lookupcache_positive,
117 }; 116 };
118 117
119 static const struct constant_table nfs_param_e 118 static const struct constant_table nfs_param_enums_lookupcache[] = {
120 { "all", Opt_lookupcach 119 { "all", Opt_lookupcache_all },
121 { "none", Opt_lookupcach 120 { "none", Opt_lookupcache_none },
122 { "pos", Opt_lookupcach 121 { "pos", Opt_lookupcache_positive },
123 { "positive", Opt_lookupcach 122 { "positive", Opt_lookupcache_positive },
124 {} 123 {}
125 }; 124 };
126 125
127 enum { 126 enum {
128 Opt_write_lazy, 127 Opt_write_lazy,
129 Opt_write_eager, 128 Opt_write_eager,
130 Opt_write_wait, 129 Opt_write_wait,
131 }; 130 };
132 131
133 static const struct constant_table nfs_param_e 132 static const struct constant_table nfs_param_enums_write[] = {
134 { "lazy", Opt_write_lazy 133 { "lazy", Opt_write_lazy },
135 { "eager", Opt_write_eage 134 { "eager", Opt_write_eager },
136 { "wait", Opt_write_wait 135 { "wait", Opt_write_wait },
137 {} 136 {}
138 }; 137 };
139 138
140 static const struct fs_parameter_spec nfs_fs_p 139 static const struct fs_parameter_spec nfs_fs_parameters[] = {
141 fsparam_flag_no("ac", Opt_ac 140 fsparam_flag_no("ac", Opt_ac),
142 fsparam_u32 ("acdirmax", Opt_ac 141 fsparam_u32 ("acdirmax", Opt_acdirmax),
143 fsparam_u32 ("acdirmin", Opt_ac 142 fsparam_u32 ("acdirmin", Opt_acdirmin),
144 fsparam_flag_no("acl", Opt_ac 143 fsparam_flag_no("acl", Opt_acl),
145 fsparam_u32 ("acregmax", Opt_ac 144 fsparam_u32 ("acregmax", Opt_acregmax),
146 fsparam_u32 ("acregmin", Opt_ac 145 fsparam_u32 ("acregmin", Opt_acregmin),
147 fsparam_u32 ("actimeo", Opt_ac 146 fsparam_u32 ("actimeo", Opt_actimeo),
148 fsparam_string("addr", Opt_ad 147 fsparam_string("addr", Opt_addr),
149 fsparam_flag ("bg", Opt_bg 148 fsparam_flag ("bg", Opt_bg),
150 fsparam_u32 ("bsize", Opt_bs 149 fsparam_u32 ("bsize", Opt_bsize),
151 fsparam_string("clientaddr", Opt_cl 150 fsparam_string("clientaddr", Opt_clientaddr),
152 fsparam_flag_no("cto", Opt_ct 151 fsparam_flag_no("cto", Opt_cto),
153 fsparam_flag_no("alignwrite", Opt_al <<
154 fsparam_flag ("fg", Opt_fg 152 fsparam_flag ("fg", Opt_fg),
155 fsparam_flag_no("fsc", Opt_fs 153 fsparam_flag_no("fsc", Opt_fscache_flag),
156 fsparam_string("fsc", Opt_fs 154 fsparam_string("fsc", Opt_fscache),
157 fsparam_flag ("hard", Opt_ha 155 fsparam_flag ("hard", Opt_hard),
158 __fsparam(NULL, "intr", Opt_in 156 __fsparam(NULL, "intr", Opt_intr,
159 fs_param_neg_with_no|fs_para 157 fs_param_neg_with_no|fs_param_deprecated, NULL),
160 fsparam_enum ("local_lock", Opt_lo 158 fsparam_enum ("local_lock", Opt_local_lock, nfs_param_enums_local_lock),
161 fsparam_flag_no("lock", Opt_lo 159 fsparam_flag_no("lock", Opt_lock),
162 fsparam_enum ("lookupcache", Opt_lo 160 fsparam_enum ("lookupcache", Opt_lookupcache, nfs_param_enums_lookupcache),
163 fsparam_flag_no("migration", Opt_mi 161 fsparam_flag_no("migration", Opt_migration),
164 fsparam_u32 ("minorversion", Opt_mi 162 fsparam_u32 ("minorversion", Opt_minorversion),
165 fsparam_string("mountaddr", Opt_mo 163 fsparam_string("mountaddr", Opt_mountaddr),
166 fsparam_string("mounthost", Opt_mo 164 fsparam_string("mounthost", Opt_mounthost),
167 fsparam_u32 ("mountport", Opt_mo 165 fsparam_u32 ("mountport", Opt_mountport),
168 fsparam_string("mountproto", Opt_mo 166 fsparam_string("mountproto", Opt_mountproto),
169 fsparam_u32 ("mountvers", Opt_mo 167 fsparam_u32 ("mountvers", Opt_mountvers),
170 fsparam_u32 ("namlen", Opt_na 168 fsparam_u32 ("namlen", Opt_namelen),
171 fsparam_u32 ("nconnect", Opt_nc 169 fsparam_u32 ("nconnect", Opt_nconnect),
172 fsparam_u32 ("max_connect", Opt_ma 170 fsparam_u32 ("max_connect", Opt_max_connect),
173 fsparam_string("nfsvers", Opt_ve 171 fsparam_string("nfsvers", Opt_vers),
174 fsparam_u32 ("port", Opt_po 172 fsparam_u32 ("port", Opt_port),
175 fsparam_flag_no("posix", Opt_po 173 fsparam_flag_no("posix", Opt_posix),
176 fsparam_string("proto", Opt_pr 174 fsparam_string("proto", Opt_proto),
177 fsparam_flag_no("rdirplus", Opt_rd 175 fsparam_flag_no("rdirplus", Opt_rdirplus),
178 fsparam_flag ("rdma", Opt_rd 176 fsparam_flag ("rdma", Opt_rdma),
179 fsparam_flag_no("resvport", Opt_re 177 fsparam_flag_no("resvport", Opt_resvport),
180 fsparam_u32 ("retrans", Opt_re 178 fsparam_u32 ("retrans", Opt_retrans),
181 fsparam_string("retry", Opt_re 179 fsparam_string("retry", Opt_retry),
182 fsparam_u32 ("rsize", Opt_rs 180 fsparam_u32 ("rsize", Opt_rsize),
183 fsparam_string("sec", Opt_se 181 fsparam_string("sec", Opt_sec),
184 fsparam_flag_no("sharecache", Opt_sh 182 fsparam_flag_no("sharecache", Opt_sharecache),
185 fsparam_flag ("sloppy", Opt_sl 183 fsparam_flag ("sloppy", Opt_sloppy),
186 fsparam_flag ("soft", Opt_so 184 fsparam_flag ("soft", Opt_soft),
187 fsparam_flag ("softerr", Opt_so 185 fsparam_flag ("softerr", Opt_softerr),
188 fsparam_flag ("softreval", Opt_so 186 fsparam_flag ("softreval", Opt_softreval),
189 fsparam_string("source", Opt_so 187 fsparam_string("source", Opt_source),
190 fsparam_flag ("tcp", Opt_tc 188 fsparam_flag ("tcp", Opt_tcp),
191 fsparam_u32 ("timeo", Opt_ti 189 fsparam_u32 ("timeo", Opt_timeo),
192 fsparam_flag_no("trunkdiscovery", Opt_ 190 fsparam_flag_no("trunkdiscovery", Opt_trunkdiscovery),
193 fsparam_flag ("udp", Opt_ud 191 fsparam_flag ("udp", Opt_udp),
194 fsparam_flag ("v2", Opt_v) 192 fsparam_flag ("v2", Opt_v),
195 fsparam_flag ("v3", Opt_v) 193 fsparam_flag ("v3", Opt_v),
196 fsparam_flag ("v4", Opt_v) 194 fsparam_flag ("v4", Opt_v),
197 fsparam_flag ("v4.0", Opt_v) 195 fsparam_flag ("v4.0", Opt_v),
198 fsparam_flag ("v4.1", Opt_v) 196 fsparam_flag ("v4.1", Opt_v),
199 fsparam_flag ("v4.2", Opt_v) 197 fsparam_flag ("v4.2", Opt_v),
200 fsparam_string("vers", Opt_ve 198 fsparam_string("vers", Opt_vers),
201 fsparam_enum ("write", Opt_wr 199 fsparam_enum ("write", Opt_write, nfs_param_enums_write),
202 fsparam_u32 ("wsize", Opt_ws 200 fsparam_u32 ("wsize", Opt_wsize),
203 fsparam_string("xprtsec", Opt_xp 201 fsparam_string("xprtsec", Opt_xprtsec),
204 {} 202 {}
205 }; 203 };
206 204
207 enum { 205 enum {
208 Opt_vers_2, 206 Opt_vers_2,
209 Opt_vers_3, 207 Opt_vers_3,
210 Opt_vers_4, 208 Opt_vers_4,
211 Opt_vers_4_0, 209 Opt_vers_4_0,
212 Opt_vers_4_1, 210 Opt_vers_4_1,
213 Opt_vers_4_2, 211 Opt_vers_4_2,
214 }; 212 };
215 213
216 static const struct constant_table nfs_vers_to 214 static const struct constant_table nfs_vers_tokens[] = {
217 { "2", Opt_vers_2 }, 215 { "2", Opt_vers_2 },
218 { "3", Opt_vers_3 }, 216 { "3", Opt_vers_3 },
219 { "4", Opt_vers_4 }, 217 { "4", Opt_vers_4 },
220 { "4.0", Opt_vers_4_0 }, 218 { "4.0", Opt_vers_4_0 },
221 { "4.1", Opt_vers_4_1 }, 219 { "4.1", Opt_vers_4_1 },
222 { "4.2", Opt_vers_4_2 }, 220 { "4.2", Opt_vers_4_2 },
223 {} 221 {}
224 }; 222 };
225 223
226 enum { 224 enum {
227 Opt_xprt_rdma, 225 Opt_xprt_rdma,
228 Opt_xprt_rdma6, 226 Opt_xprt_rdma6,
229 Opt_xprt_tcp, 227 Opt_xprt_tcp,
230 Opt_xprt_tcp6, 228 Opt_xprt_tcp6,
231 Opt_xprt_udp, 229 Opt_xprt_udp,
232 Opt_xprt_udp6, 230 Opt_xprt_udp6,
233 nr__Opt_xprt 231 nr__Opt_xprt
234 }; 232 };
235 233
236 static const struct constant_table nfs_xprt_pr 234 static const struct constant_table nfs_xprt_protocol_tokens[] = {
237 { "rdma", Opt_xprt_rdma }, 235 { "rdma", Opt_xprt_rdma },
238 { "rdma6", Opt_xprt_rdma6 }, 236 { "rdma6", Opt_xprt_rdma6 },
239 { "tcp", Opt_xprt_tcp }, 237 { "tcp", Opt_xprt_tcp },
240 { "tcp6", Opt_xprt_tcp6 }, 238 { "tcp6", Opt_xprt_tcp6 },
241 { "udp", Opt_xprt_udp }, 239 { "udp", Opt_xprt_udp },
242 { "udp6", Opt_xprt_udp6 }, 240 { "udp6", Opt_xprt_udp6 },
243 {} 241 {}
244 }; 242 };
245 243
246 enum { 244 enum {
247 Opt_sec_krb5, 245 Opt_sec_krb5,
248 Opt_sec_krb5i, 246 Opt_sec_krb5i,
249 Opt_sec_krb5p, 247 Opt_sec_krb5p,
250 Opt_sec_lkey, 248 Opt_sec_lkey,
251 Opt_sec_lkeyi, 249 Opt_sec_lkeyi,
252 Opt_sec_lkeyp, 250 Opt_sec_lkeyp,
253 Opt_sec_none, 251 Opt_sec_none,
254 Opt_sec_spkm, 252 Opt_sec_spkm,
255 Opt_sec_spkmi, 253 Opt_sec_spkmi,
256 Opt_sec_spkmp, 254 Opt_sec_spkmp,
257 Opt_sec_sys, 255 Opt_sec_sys,
258 nr__Opt_sec 256 nr__Opt_sec
259 }; 257 };
260 258
261 static const struct constant_table nfs_secflav 259 static const struct constant_table nfs_secflavor_tokens[] = {
262 { "krb5", Opt_sec_krb5 }, 260 { "krb5", Opt_sec_krb5 },
263 { "krb5i", Opt_sec_krb5i }, 261 { "krb5i", Opt_sec_krb5i },
264 { "krb5p", Opt_sec_krb5p }, 262 { "krb5p", Opt_sec_krb5p },
265 { "lkey", Opt_sec_lkey }, 263 { "lkey", Opt_sec_lkey },
266 { "lkeyi", Opt_sec_lkeyi }, 264 { "lkeyi", Opt_sec_lkeyi },
267 { "lkeyp", Opt_sec_lkeyp }, 265 { "lkeyp", Opt_sec_lkeyp },
268 { "none", Opt_sec_none }, 266 { "none", Opt_sec_none },
269 { "null", Opt_sec_none }, 267 { "null", Opt_sec_none },
270 { "spkm3", Opt_sec_spkm }, 268 { "spkm3", Opt_sec_spkm },
271 { "spkm3i", Opt_sec_spkmi }, 269 { "spkm3i", Opt_sec_spkmi },
272 { "spkm3p", Opt_sec_spkmp }, 270 { "spkm3p", Opt_sec_spkmp },
273 { "sys", Opt_sec_sys }, 271 { "sys", Opt_sec_sys },
274 {} 272 {}
275 }; 273 };
276 274
277 enum { 275 enum {
278 Opt_xprtsec_none, 276 Opt_xprtsec_none,
279 Opt_xprtsec_tls, 277 Opt_xprtsec_tls,
280 Opt_xprtsec_mtls, 278 Opt_xprtsec_mtls,
281 nr__Opt_xprtsec 279 nr__Opt_xprtsec
282 }; 280 };
283 281
284 static const struct constant_table nfs_xprtsec 282 static const struct constant_table nfs_xprtsec_policies[] = {
285 { "none", Opt_xprtsec_none }, 283 { "none", Opt_xprtsec_none },
286 { "tls", Opt_xprtsec_tls }, 284 { "tls", Opt_xprtsec_tls },
287 { "mtls", Opt_xprtsec_mtls }, 285 { "mtls", Opt_xprtsec_mtls },
288 {} 286 {}
289 }; 287 };
290 288
291 /* 289 /*
292 * Sanity-check a server address provided by t 290 * Sanity-check a server address provided by the mount command.
293 * 291 *
294 * Address family must be initialized, and add 292 * Address family must be initialized, and address must not be
295 * the ANY address for that family. 293 * the ANY address for that family.
296 */ 294 */
297 static int nfs_verify_server_address(struct so 295 static int nfs_verify_server_address(struct sockaddr_storage *addr)
298 { 296 {
299 switch (addr->ss_family) { 297 switch (addr->ss_family) {
300 case AF_INET: { 298 case AF_INET: {
301 struct sockaddr_in *sa = (stru 299 struct sockaddr_in *sa = (struct sockaddr_in *)addr;
302 return sa->sin_addr.s_addr != 300 return sa->sin_addr.s_addr != htonl(INADDR_ANY);
303 } 301 }
304 case AF_INET6: { 302 case AF_INET6: {
305 struct in6_addr *sa = &((struc 303 struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr;
306 return !ipv6_addr_any(sa); 304 return !ipv6_addr_any(sa);
307 } 305 }
308 } 306 }
309 307
310 return 0; 308 return 0;
311 } 309 }
312 310
313 #ifdef CONFIG_NFS_DISABLE_UDP_SUPPORT 311 #ifdef CONFIG_NFS_DISABLE_UDP_SUPPORT
314 static bool nfs_server_transport_udp_invalid(c 312 static bool nfs_server_transport_udp_invalid(const struct nfs_fs_context *ctx)
315 { 313 {
316 return true; 314 return true;
317 } 315 }
318 #else 316 #else
319 static bool nfs_server_transport_udp_invalid(c 317 static bool nfs_server_transport_udp_invalid(const struct nfs_fs_context *ctx)
320 { 318 {
321 if (ctx->version == 4) 319 if (ctx->version == 4)
322 return true; 320 return true;
323 return false; 321 return false;
324 } 322 }
325 #endif 323 #endif
326 324
327 /* 325 /*
328 * Sanity check the NFS transport protocol. 326 * Sanity check the NFS transport protocol.
329 */ 327 */
330 static int nfs_validate_transport_protocol(str 328 static int nfs_validate_transport_protocol(struct fs_context *fc,
331 str 329 struct nfs_fs_context *ctx)
332 { 330 {
333 switch (ctx->nfs_server.protocol) { 331 switch (ctx->nfs_server.protocol) {
334 case XPRT_TRANSPORT_UDP: 332 case XPRT_TRANSPORT_UDP:
335 if (nfs_server_transport_udp_i 333 if (nfs_server_transport_udp_invalid(ctx))
336 goto out_invalid_trans 334 goto out_invalid_transport_udp;
337 break; 335 break;
338 case XPRT_TRANSPORT_TCP: 336 case XPRT_TRANSPORT_TCP:
339 case XPRT_TRANSPORT_RDMA: 337 case XPRT_TRANSPORT_RDMA:
340 break; 338 break;
341 default: 339 default:
342 ctx->nfs_server.protocol = XPR 340 ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP;
343 } 341 }
344 342
345 if (ctx->xprtsec.policy != RPC_XPRTSEC 343 if (ctx->xprtsec.policy != RPC_XPRTSEC_NONE)
346 switch (ctx->nfs_server.protoc 344 switch (ctx->nfs_server.protocol) {
347 case XPRT_TRANSPORT_TCP: 345 case XPRT_TRANSPORT_TCP:
348 ctx->nfs_server.protoc 346 ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP_TLS;
349 break; 347 break;
350 default: 348 default:
351 goto out_invalid_xprts 349 goto out_invalid_xprtsec_policy;
352 } 350 }
353 351
354 return 0; 352 return 0;
355 out_invalid_transport_udp: 353 out_invalid_transport_udp:
356 return nfs_invalf(fc, "NFS: Unsupporte 354 return nfs_invalf(fc, "NFS: Unsupported transport protocol udp");
357 out_invalid_xprtsec_policy: 355 out_invalid_xprtsec_policy:
358 return nfs_invalf(fc, "NFS: Transport 356 return nfs_invalf(fc, "NFS: Transport does not support xprtsec");
359 } 357 }
360 358
361 /* 359 /*
362 * For text based NFSv2/v3 mounts, the mount p 360 * For text based NFSv2/v3 mounts, the mount protocol transport default
363 * settings should depend upon the specified N 361 * settings should depend upon the specified NFS transport.
364 */ 362 */
365 static void nfs_set_mount_transport_protocol(s 363 static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx)
366 { 364 {
367 if (ctx->mount_server.protocol == XPRT 365 if (ctx->mount_server.protocol == XPRT_TRANSPORT_UDP ||
368 ctx->mount_server.protocol == XPRT 366 ctx->mount_server.protocol == XPRT_TRANSPORT_TCP)
369 return; 367 return;
370 switch (ctx->nfs_server.protocol) { 368 switch (ctx->nfs_server.protocol) {
371 case XPRT_TRANSPORT_UDP: 369 case XPRT_TRANSPORT_UDP:
372 ctx->mount_server.protocol = X 370 ctx->mount_server.protocol = XPRT_TRANSPORT_UDP;
373 break; 371 break;
374 case XPRT_TRANSPORT_TCP: 372 case XPRT_TRANSPORT_TCP:
375 case XPRT_TRANSPORT_RDMA: 373 case XPRT_TRANSPORT_RDMA:
376 ctx->mount_server.protocol = X 374 ctx->mount_server.protocol = XPRT_TRANSPORT_TCP;
377 } 375 }
378 } 376 }
379 377
380 /* 378 /*
381 * Add 'flavor' to 'auth_info' if not already 379 * Add 'flavor' to 'auth_info' if not already present.
382 * Returns true if 'flavor' ends up in the lis 380 * Returns true if 'flavor' ends up in the list, false otherwise
383 */ 381 */
384 static int nfs_auth_info_add(struct fs_context 382 static int nfs_auth_info_add(struct fs_context *fc,
385 struct nfs_auth_i 383 struct nfs_auth_info *auth_info,
386 rpc_authflavor_t 384 rpc_authflavor_t flavor)
387 { 385 {
388 unsigned int i; 386 unsigned int i;
389 unsigned int max_flavor_len = ARRAY_SI 387 unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors);
390 388
391 /* make sure this flavor isn't already 389 /* make sure this flavor isn't already in the list */
392 for (i = 0; i < auth_info->flavor_len; 390 for (i = 0; i < auth_info->flavor_len; i++) {
393 if (flavor == auth_info->flavo 391 if (flavor == auth_info->flavors[i])
394 return 0; 392 return 0;
395 } 393 }
396 394
397 if (auth_info->flavor_len + 1 >= max_f 395 if (auth_info->flavor_len + 1 >= max_flavor_len)
398 return nfs_invalf(fc, "NFS: to 396 return nfs_invalf(fc, "NFS: too many sec= flavors");
399 397
400 auth_info->flavors[auth_info->flavor_l 398 auth_info->flavors[auth_info->flavor_len++] = flavor;
401 return 0; 399 return 0;
402 } 400 }
403 401
404 /* 402 /*
405 * Parse the value of the 'sec=' option. 403 * Parse the value of the 'sec=' option.
406 */ 404 */
407 static int nfs_parse_security_flavors(struct f 405 static int nfs_parse_security_flavors(struct fs_context *fc,
408 struct f 406 struct fs_parameter *param)
409 { 407 {
410 struct nfs_fs_context *ctx = nfs_fc2co 408 struct nfs_fs_context *ctx = nfs_fc2context(fc);
411 rpc_authflavor_t pseudoflavor; 409 rpc_authflavor_t pseudoflavor;
412 char *string = param->string, *p; 410 char *string = param->string, *p;
413 int ret; 411 int ret;
414 412
415 trace_nfs_mount_assign(param->key, str 413 trace_nfs_mount_assign(param->key, string);
416 414
417 while ((p = strsep(&string, ":")) != N 415 while ((p = strsep(&string, ":")) != NULL) {
418 if (!*p) 416 if (!*p)
419 continue; 417 continue;
420 switch (lookup_constant(nfs_se 418 switch (lookup_constant(nfs_secflavor_tokens, p, -1)) {
421 case Opt_sec_none: 419 case Opt_sec_none:
422 pseudoflavor = RPC_AUT 420 pseudoflavor = RPC_AUTH_NULL;
423 break; 421 break;
424 case Opt_sec_sys: 422 case Opt_sec_sys:
425 pseudoflavor = RPC_AUT 423 pseudoflavor = RPC_AUTH_UNIX;
426 break; 424 break;
427 case Opt_sec_krb5: 425 case Opt_sec_krb5:
428 pseudoflavor = RPC_AUT 426 pseudoflavor = RPC_AUTH_GSS_KRB5;
429 break; 427 break;
430 case Opt_sec_krb5i: 428 case Opt_sec_krb5i:
431 pseudoflavor = RPC_AUT 429 pseudoflavor = RPC_AUTH_GSS_KRB5I;
432 break; 430 break;
433 case Opt_sec_krb5p: 431 case Opt_sec_krb5p:
434 pseudoflavor = RPC_AUT 432 pseudoflavor = RPC_AUTH_GSS_KRB5P;
435 break; 433 break;
436 case Opt_sec_lkey: 434 case Opt_sec_lkey:
437 pseudoflavor = RPC_AUT 435 pseudoflavor = RPC_AUTH_GSS_LKEY;
438 break; 436 break;
439 case Opt_sec_lkeyi: 437 case Opt_sec_lkeyi:
440 pseudoflavor = RPC_AUT 438 pseudoflavor = RPC_AUTH_GSS_LKEYI;
441 break; 439 break;
442 case Opt_sec_lkeyp: 440 case Opt_sec_lkeyp:
443 pseudoflavor = RPC_AUT 441 pseudoflavor = RPC_AUTH_GSS_LKEYP;
444 break; 442 break;
445 case Opt_sec_spkm: 443 case Opt_sec_spkm:
446 pseudoflavor = RPC_AUT 444 pseudoflavor = RPC_AUTH_GSS_SPKM;
447 break; 445 break;
448 case Opt_sec_spkmi: 446 case Opt_sec_spkmi:
449 pseudoflavor = RPC_AUT 447 pseudoflavor = RPC_AUTH_GSS_SPKMI;
450 break; 448 break;
451 case Opt_sec_spkmp: 449 case Opt_sec_spkmp:
452 pseudoflavor = RPC_AUT 450 pseudoflavor = RPC_AUTH_GSS_SPKMP;
453 break; 451 break;
454 default: 452 default:
455 return nfs_invalf(fc, 453 return nfs_invalf(fc, "NFS: sec=%s option not recognized", p);
456 } 454 }
457 455
458 ret = nfs_auth_info_add(fc, &c 456 ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor);
459 if (ret < 0) 457 if (ret < 0)
460 return ret; 458 return ret;
461 } 459 }
462 460
463 return 0; 461 return 0;
464 } 462 }
465 463
466 static int nfs_parse_xprtsec_policy(struct fs_ 464 static int nfs_parse_xprtsec_policy(struct fs_context *fc,
467 struct fs_ 465 struct fs_parameter *param)
468 { 466 {
469 struct nfs_fs_context *ctx = nfs_fc2co 467 struct nfs_fs_context *ctx = nfs_fc2context(fc);
470 468
471 trace_nfs_mount_assign(param->key, par 469 trace_nfs_mount_assign(param->key, param->string);
472 470
473 switch (lookup_constant(nfs_xprtsec_po 471 switch (lookup_constant(nfs_xprtsec_policies, param->string, -1)) {
474 case Opt_xprtsec_none: 472 case Opt_xprtsec_none:
475 ctx->xprtsec.policy = RPC_XPRT 473 ctx->xprtsec.policy = RPC_XPRTSEC_NONE;
476 break; 474 break;
477 case Opt_xprtsec_tls: 475 case Opt_xprtsec_tls:
478 ctx->xprtsec.policy = RPC_XPRT 476 ctx->xprtsec.policy = RPC_XPRTSEC_TLS_ANON;
479 break; 477 break;
480 case Opt_xprtsec_mtls: 478 case Opt_xprtsec_mtls:
481 ctx->xprtsec.policy = RPC_XPRT 479 ctx->xprtsec.policy = RPC_XPRTSEC_TLS_X509;
482 break; 480 break;
483 default: 481 default:
484 return nfs_invalf(fc, "NFS: Un 482 return nfs_invalf(fc, "NFS: Unrecognized transport security policy");
485 } 483 }
486 return 0; 484 return 0;
487 } 485 }
488 486
489 static int nfs_parse_version_string(struct fs_ 487 static int nfs_parse_version_string(struct fs_context *fc,
490 const char 488 const char *string)
491 { 489 {
492 struct nfs_fs_context *ctx = nfs_fc2co 490 struct nfs_fs_context *ctx = nfs_fc2context(fc);
493 491
494 ctx->flags &= ~NFS_MOUNT_VER3; 492 ctx->flags &= ~NFS_MOUNT_VER3;
495 switch (lookup_constant(nfs_vers_token 493 switch (lookup_constant(nfs_vers_tokens, string, -1)) {
496 case Opt_vers_2: 494 case Opt_vers_2:
497 ctx->version = 2; 495 ctx->version = 2;
498 break; 496 break;
499 case Opt_vers_3: 497 case Opt_vers_3:
500 ctx->flags |= NFS_MOUNT_VER3; 498 ctx->flags |= NFS_MOUNT_VER3;
501 ctx->version = 3; 499 ctx->version = 3;
502 break; 500 break;
503 case Opt_vers_4: 501 case Opt_vers_4:
504 /* Backward compatibility opti 502 /* Backward compatibility option. In future,
505 * the mount program should al 503 * the mount program should always supply
506 * a NFSv4 minor version numbe 504 * a NFSv4 minor version number.
507 */ 505 */
508 ctx->version = 4; 506 ctx->version = 4;
509 break; 507 break;
510 case Opt_vers_4_0: 508 case Opt_vers_4_0:
511 ctx->version = 4; 509 ctx->version = 4;
512 ctx->minorversion = 0; 510 ctx->minorversion = 0;
513 break; 511 break;
514 case Opt_vers_4_1: 512 case Opt_vers_4_1:
515 ctx->version = 4; 513 ctx->version = 4;
516 ctx->minorversion = 1; 514 ctx->minorversion = 1;
517 break; 515 break;
518 case Opt_vers_4_2: 516 case Opt_vers_4_2:
519 ctx->version = 4; 517 ctx->version = 4;
520 ctx->minorversion = 2; 518 ctx->minorversion = 2;
521 break; 519 break;
522 default: 520 default:
523 return nfs_invalf(fc, "NFS: Un 521 return nfs_invalf(fc, "NFS: Unsupported NFS version");
524 } 522 }
525 return 0; 523 return 0;
526 } 524 }
527 525
528 /* 526 /*
529 * Parse a single mount parameter. 527 * Parse a single mount parameter.
530 */ 528 */
531 static int nfs_fs_context_parse_param(struct f 529 static int nfs_fs_context_parse_param(struct fs_context *fc,
532 struct f 530 struct fs_parameter *param)
533 { 531 {
534 struct fs_parse_result result; 532 struct fs_parse_result result;
535 struct nfs_fs_context *ctx = nfs_fc2co 533 struct nfs_fs_context *ctx = nfs_fc2context(fc);
536 unsigned short protofamily, mountfamil 534 unsigned short protofamily, mountfamily;
537 unsigned int len; 535 unsigned int len;
538 int ret, opt; 536 int ret, opt;
539 537
540 trace_nfs_mount_option(param); 538 trace_nfs_mount_option(param);
541 539
542 opt = fs_parse(fc, nfs_fs_parameters, 540 opt = fs_parse(fc, nfs_fs_parameters, param, &result);
543 if (opt < 0) 541 if (opt < 0)
544 return (opt == -ENOPARAM && ct 542 return (opt == -ENOPARAM && ctx->sloppy) ? 1 : opt;
545 543
546 if (fc->security) 544 if (fc->security)
547 ctx->has_sec_mnt_opts = 1; 545 ctx->has_sec_mnt_opts = 1;
548 546
549 switch (opt) { 547 switch (opt) {
550 case Opt_source: 548 case Opt_source:
551 if (fc->source) 549 if (fc->source)
552 return nfs_invalf(fc, 550 return nfs_invalf(fc, "NFS: Multiple sources not supported");
553 fc->source = param->string; 551 fc->source = param->string;
554 param->string = NULL; 552 param->string = NULL;
555 break; 553 break;
556 554
557 /* 555 /*
558 * boolean options: foo/nofoo 556 * boolean options: foo/nofoo
559 */ 557 */
560 case Opt_soft: 558 case Opt_soft:
561 ctx->flags |= NFS_MOUNT_SOFT; 559 ctx->flags |= NFS_MOUNT_SOFT;
562 ctx->flags &= ~NFS_MOUNT_SOFTE 560 ctx->flags &= ~NFS_MOUNT_SOFTERR;
563 break; 561 break;
564 case Opt_softerr: 562 case Opt_softerr:
565 ctx->flags |= NFS_MOUNT_SOFTER 563 ctx->flags |= NFS_MOUNT_SOFTERR | NFS_MOUNT_SOFTREVAL;
566 ctx->flags &= ~NFS_MOUNT_SOFT; 564 ctx->flags &= ~NFS_MOUNT_SOFT;
567 break; 565 break;
568 case Opt_hard: 566 case Opt_hard:
569 ctx->flags &= ~(NFS_MOUNT_SOFT 567 ctx->flags &= ~(NFS_MOUNT_SOFT |
570 NFS_MOUNT_SOFT 568 NFS_MOUNT_SOFTERR |
571 NFS_MOUNT_SOFT 569 NFS_MOUNT_SOFTREVAL);
572 break; 570 break;
573 case Opt_softreval: 571 case Opt_softreval:
574 if (result.negated) 572 if (result.negated)
575 ctx->flags &= ~NFS_MOU 573 ctx->flags &= ~NFS_MOUNT_SOFTREVAL;
576 else 574 else
577 ctx->flags |= NFS_MOUN 575 ctx->flags |= NFS_MOUNT_SOFTREVAL;
578 break; 576 break;
579 case Opt_posix: 577 case Opt_posix:
580 if (result.negated) 578 if (result.negated)
581 ctx->flags &= ~NFS_MOU 579 ctx->flags &= ~NFS_MOUNT_POSIX;
582 else 580 else
583 ctx->flags |= NFS_MOUN 581 ctx->flags |= NFS_MOUNT_POSIX;
584 break; 582 break;
585 case Opt_cto: 583 case Opt_cto:
586 if (result.negated) 584 if (result.negated)
587 ctx->flags |= NFS_MOUN 585 ctx->flags |= NFS_MOUNT_NOCTO;
588 else 586 else
589 ctx->flags &= ~NFS_MOU 587 ctx->flags &= ~NFS_MOUNT_NOCTO;
590 break; 588 break;
591 case Opt_trunkdiscovery: 589 case Opt_trunkdiscovery:
592 if (result.negated) 590 if (result.negated)
593 ctx->flags &= ~NFS_MOU 591 ctx->flags &= ~NFS_MOUNT_TRUNK_DISCOVERY;
594 else 592 else
595 ctx->flags |= NFS_MOUN 593 ctx->flags |= NFS_MOUNT_TRUNK_DISCOVERY;
596 break; 594 break;
597 case Opt_alignwrite: <<
598 if (result.negated) <<
599 ctx->flags |= NFS_MOUN <<
600 else <<
601 ctx->flags &= ~NFS_MOU <<
602 break; <<
603 case Opt_ac: 595 case Opt_ac:
604 if (result.negated) 596 if (result.negated)
605 ctx->flags |= NFS_MOUN 597 ctx->flags |= NFS_MOUNT_NOAC;
606 else 598 else
607 ctx->flags &= ~NFS_MOU 599 ctx->flags &= ~NFS_MOUNT_NOAC;
608 break; 600 break;
609 case Opt_lock: 601 case Opt_lock:
610 if (result.negated) { 602 if (result.negated) {
611 ctx->lock_status = NFS <<
612 ctx->flags |= NFS_MOUN 603 ctx->flags |= NFS_MOUNT_NONLM;
613 ctx->flags |= (NFS_MOU 604 ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL);
614 } else { 605 } else {
615 ctx->lock_status = NFS <<
616 ctx->flags &= ~NFS_MOU 606 ctx->flags &= ~NFS_MOUNT_NONLM;
617 ctx->flags &= ~(NFS_MO 607 ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL);
618 } 608 }
619 break; 609 break;
620 case Opt_udp: 610 case Opt_udp:
621 ctx->flags &= ~NFS_MOUNT_TCP; 611 ctx->flags &= ~NFS_MOUNT_TCP;
622 ctx->nfs_server.protocol = XPR 612 ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP;
623 break; 613 break;
624 case Opt_tcp: 614 case Opt_tcp:
625 case Opt_rdma: 615 case Opt_rdma:
626 ctx->flags |= NFS_MOUNT_TCP; / 616 ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */
627 ret = xprt_find_transport_iden 617 ret = xprt_find_transport_ident(param->key);
628 if (ret < 0) 618 if (ret < 0)
629 goto out_bad_transport 619 goto out_bad_transport;
630 ctx->nfs_server.protocol = ret 620 ctx->nfs_server.protocol = ret;
631 break; 621 break;
632 case Opt_acl: 622 case Opt_acl:
633 if (result.negated) 623 if (result.negated)
634 ctx->flags |= NFS_MOUN 624 ctx->flags |= NFS_MOUNT_NOACL;
635 else 625 else
636 ctx->flags &= ~NFS_MOU 626 ctx->flags &= ~NFS_MOUNT_NOACL;
637 break; 627 break;
638 case Opt_rdirplus: 628 case Opt_rdirplus:
639 if (result.negated) 629 if (result.negated)
640 ctx->flags |= NFS_MOUN 630 ctx->flags |= NFS_MOUNT_NORDIRPLUS;
641 else 631 else
642 ctx->flags &= ~NFS_MOU 632 ctx->flags &= ~NFS_MOUNT_NORDIRPLUS;
643 break; 633 break;
644 case Opt_sharecache: 634 case Opt_sharecache:
645 if (result.negated) 635 if (result.negated)
646 ctx->flags |= NFS_MOUN 636 ctx->flags |= NFS_MOUNT_UNSHARED;
647 else 637 else
648 ctx->flags &= ~NFS_MOU 638 ctx->flags &= ~NFS_MOUNT_UNSHARED;
649 break; 639 break;
650 case Opt_resvport: 640 case Opt_resvport:
651 if (result.negated) 641 if (result.negated)
652 ctx->flags |= NFS_MOUN 642 ctx->flags |= NFS_MOUNT_NORESVPORT;
653 else 643 else
654 ctx->flags &= ~NFS_MOU 644 ctx->flags &= ~NFS_MOUNT_NORESVPORT;
655 break; 645 break;
656 case Opt_fscache_flag: 646 case Opt_fscache_flag:
657 if (result.negated) 647 if (result.negated)
658 ctx->options &= ~NFS_O 648 ctx->options &= ~NFS_OPTION_FSCACHE;
659 else 649 else
660 ctx->options |= NFS_OP 650 ctx->options |= NFS_OPTION_FSCACHE;
661 kfree(ctx->fscache_uniq); 651 kfree(ctx->fscache_uniq);
662 ctx->fscache_uniq = NULL; 652 ctx->fscache_uniq = NULL;
663 break; 653 break;
664 case Opt_fscache: 654 case Opt_fscache:
665 trace_nfs_mount_assign(param-> 655 trace_nfs_mount_assign(param->key, param->string);
666 ctx->options |= NFS_OPTION_FSC 656 ctx->options |= NFS_OPTION_FSCACHE;
667 kfree(ctx->fscache_uniq); 657 kfree(ctx->fscache_uniq);
668 ctx->fscache_uniq = param->str 658 ctx->fscache_uniq = param->string;
669 param->string = NULL; 659 param->string = NULL;
670 break; 660 break;
671 case Opt_migration: 661 case Opt_migration:
672 if (result.negated) 662 if (result.negated)
673 ctx->options &= ~NFS_O 663 ctx->options &= ~NFS_OPTION_MIGRATION;
674 else 664 else
675 ctx->options |= NFS_OP 665 ctx->options |= NFS_OPTION_MIGRATION;
676 break; 666 break;
677 667
678 /* 668 /*
679 * options that take numeric v 669 * options that take numeric values
680 */ 670 */
681 case Opt_port: 671 case Opt_port:
682 if (result.uint_32 > USHRT_MAX 672 if (result.uint_32 > USHRT_MAX)
683 goto out_of_bounds; 673 goto out_of_bounds;
684 ctx->nfs_server.port = result. 674 ctx->nfs_server.port = result.uint_32;
685 break; 675 break;
686 case Opt_rsize: 676 case Opt_rsize:
687 ctx->rsize = result.uint_32; 677 ctx->rsize = result.uint_32;
688 break; 678 break;
689 case Opt_wsize: 679 case Opt_wsize:
690 ctx->wsize = result.uint_32; 680 ctx->wsize = result.uint_32;
691 break; 681 break;
692 case Opt_bsize: 682 case Opt_bsize:
693 ctx->bsize = result.uint_32; 683 ctx->bsize = result.uint_32;
694 break; 684 break;
695 case Opt_timeo: 685 case Opt_timeo:
696 if (result.uint_32 < 1 || resu 686 if (result.uint_32 < 1 || result.uint_32 > INT_MAX)
697 goto out_of_bounds; 687 goto out_of_bounds;
698 ctx->timeo = result.uint_32; 688 ctx->timeo = result.uint_32;
699 break; 689 break;
700 case Opt_retrans: 690 case Opt_retrans:
701 if (result.uint_32 > INT_MAX) 691 if (result.uint_32 > INT_MAX)
702 goto out_of_bounds; 692 goto out_of_bounds;
703 ctx->retrans = result.uint_32; 693 ctx->retrans = result.uint_32;
704 break; 694 break;
705 case Opt_acregmin: 695 case Opt_acregmin:
706 ctx->acregmin = result.uint_32 696 ctx->acregmin = result.uint_32;
707 break; 697 break;
708 case Opt_acregmax: 698 case Opt_acregmax:
709 ctx->acregmax = result.uint_32 699 ctx->acregmax = result.uint_32;
710 break; 700 break;
711 case Opt_acdirmin: 701 case Opt_acdirmin:
712 ctx->acdirmin = result.uint_32 702 ctx->acdirmin = result.uint_32;
713 break; 703 break;
714 case Opt_acdirmax: 704 case Opt_acdirmax:
715 ctx->acdirmax = result.uint_32 705 ctx->acdirmax = result.uint_32;
716 break; 706 break;
717 case Opt_actimeo: 707 case Opt_actimeo:
718 ctx->acregmin = result.uint_32 708 ctx->acregmin = result.uint_32;
719 ctx->acregmax = result.uint_32 709 ctx->acregmax = result.uint_32;
720 ctx->acdirmin = result.uint_32 710 ctx->acdirmin = result.uint_32;
721 ctx->acdirmax = result.uint_32 711 ctx->acdirmax = result.uint_32;
722 break; 712 break;
723 case Opt_namelen: 713 case Opt_namelen:
724 ctx->namlen = result.uint_32; 714 ctx->namlen = result.uint_32;
725 break; 715 break;
726 case Opt_mountport: 716 case Opt_mountport:
727 if (result.uint_32 > USHRT_MAX 717 if (result.uint_32 > USHRT_MAX)
728 goto out_of_bounds; 718 goto out_of_bounds;
729 ctx->mount_server.port = resul 719 ctx->mount_server.port = result.uint_32;
730 break; 720 break;
731 case Opt_mountvers: 721 case Opt_mountvers:
732 if (result.uint_32 < NFS_MNT_V 722 if (result.uint_32 < NFS_MNT_VERSION ||
733 result.uint_32 > NFS_MNT3_ 723 result.uint_32 > NFS_MNT3_VERSION)
734 goto out_of_bounds; 724 goto out_of_bounds;
735 ctx->mount_server.version = re 725 ctx->mount_server.version = result.uint_32;
736 break; 726 break;
737 case Opt_minorversion: 727 case Opt_minorversion:
738 if (result.uint_32 > NFS4_MAX_ 728 if (result.uint_32 > NFS4_MAX_MINOR_VERSION)
739 goto out_of_bounds; 729 goto out_of_bounds;
740 ctx->minorversion = result.uin 730 ctx->minorversion = result.uint_32;
741 break; 731 break;
742 732
743 /* 733 /*
744 * options that take text valu 734 * options that take text values
745 */ 735 */
746 case Opt_v: 736 case Opt_v:
747 ret = nfs_parse_version_string 737 ret = nfs_parse_version_string(fc, param->key + 1);
748 if (ret < 0) 738 if (ret < 0)
749 return ret; 739 return ret;
750 break; 740 break;
751 case Opt_vers: 741 case Opt_vers:
752 if (!param->string) 742 if (!param->string)
753 goto out_invalid_value 743 goto out_invalid_value;
754 trace_nfs_mount_assign(param-> 744 trace_nfs_mount_assign(param->key, param->string);
755 ret = nfs_parse_version_string 745 ret = nfs_parse_version_string(fc, param->string);
756 if (ret < 0) 746 if (ret < 0)
757 return ret; 747 return ret;
758 break; 748 break;
759 case Opt_sec: 749 case Opt_sec:
760 ret = nfs_parse_security_flavo 750 ret = nfs_parse_security_flavors(fc, param);
761 if (ret < 0) 751 if (ret < 0)
762 return ret; 752 return ret;
763 break; 753 break;
764 case Opt_xprtsec: 754 case Opt_xprtsec:
765 ret = nfs_parse_xprtsec_policy 755 ret = nfs_parse_xprtsec_policy(fc, param);
766 if (ret < 0) 756 if (ret < 0)
767 return ret; 757 return ret;
768 break; 758 break;
769 759
770 case Opt_proto: 760 case Opt_proto:
771 if (!param->string) 761 if (!param->string)
772 goto out_invalid_value 762 goto out_invalid_value;
773 trace_nfs_mount_assign(param-> 763 trace_nfs_mount_assign(param->key, param->string);
774 protofamily = AF_INET; 764 protofamily = AF_INET;
775 switch (lookup_constant(nfs_xp 765 switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) {
776 case Opt_xprt_udp6: 766 case Opt_xprt_udp6:
777 protofamily = AF_INET6 767 protofamily = AF_INET6;
778 fallthrough; 768 fallthrough;
779 case Opt_xprt_udp: 769 case Opt_xprt_udp:
780 ctx->flags &= ~NFS_MOU 770 ctx->flags &= ~NFS_MOUNT_TCP;
781 ctx->nfs_server.protoc 771 ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP;
782 break; 772 break;
783 case Opt_xprt_tcp6: 773 case Opt_xprt_tcp6:
784 protofamily = AF_INET6 774 protofamily = AF_INET6;
785 fallthrough; 775 fallthrough;
786 case Opt_xprt_tcp: 776 case Opt_xprt_tcp:
787 ctx->flags |= NFS_MOUN 777 ctx->flags |= NFS_MOUNT_TCP;
788 ctx->nfs_server.protoc 778 ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP;
789 break; 779 break;
790 case Opt_xprt_rdma6: 780 case Opt_xprt_rdma6:
791 protofamily = AF_INET6 781 protofamily = AF_INET6;
792 fallthrough; 782 fallthrough;
793 case Opt_xprt_rdma: 783 case Opt_xprt_rdma:
794 /* vector side protoco 784 /* vector side protocols to TCP */
795 ctx->flags |= NFS_MOUN 785 ctx->flags |= NFS_MOUNT_TCP;
796 ret = xprt_find_transp 786 ret = xprt_find_transport_ident(param->string);
797 if (ret < 0) 787 if (ret < 0)
798 goto out_bad_t 788 goto out_bad_transport;
799 ctx->nfs_server.protoc 789 ctx->nfs_server.protocol = ret;
800 break; 790 break;
801 default: 791 default:
802 goto out_bad_transport 792 goto out_bad_transport;
803 } 793 }
804 794
805 ctx->protofamily = protofamily 795 ctx->protofamily = protofamily;
806 break; 796 break;
807 797
808 case Opt_mountproto: 798 case Opt_mountproto:
809 if (!param->string) 799 if (!param->string)
810 goto out_invalid_value 800 goto out_invalid_value;
811 trace_nfs_mount_assign(param-> 801 trace_nfs_mount_assign(param->key, param->string);
812 mountfamily = AF_INET; 802 mountfamily = AF_INET;
813 switch (lookup_constant(nfs_xp 803 switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) {
814 case Opt_xprt_udp6: 804 case Opt_xprt_udp6:
815 mountfamily = AF_INET6 805 mountfamily = AF_INET6;
816 fallthrough; 806 fallthrough;
817 case Opt_xprt_udp: 807 case Opt_xprt_udp:
818 ctx->mount_server.prot 808 ctx->mount_server.protocol = XPRT_TRANSPORT_UDP;
819 break; 809 break;
820 case Opt_xprt_tcp6: 810 case Opt_xprt_tcp6:
821 mountfamily = AF_INET6 811 mountfamily = AF_INET6;
822 fallthrough; 812 fallthrough;
823 case Opt_xprt_tcp: 813 case Opt_xprt_tcp:
824 ctx->mount_server.prot 814 ctx->mount_server.protocol = XPRT_TRANSPORT_TCP;
825 break; 815 break;
826 case Opt_xprt_rdma: /* not use 816 case Opt_xprt_rdma: /* not used for side protocols */
827 default: 817 default:
828 goto out_bad_transport 818 goto out_bad_transport;
829 } 819 }
830 ctx->mountfamily = mountfamily 820 ctx->mountfamily = mountfamily;
831 break; 821 break;
832 822
833 case Opt_addr: 823 case Opt_addr:
834 trace_nfs_mount_assign(param-> 824 trace_nfs_mount_assign(param->key, param->string);
835 len = rpc_pton(fc->net_ns, par 825 len = rpc_pton(fc->net_ns, param->string, param->size,
836 &ctx->nfs_serve 826 &ctx->nfs_server.address,
837 sizeof(ctx->nfs 827 sizeof(ctx->nfs_server._address));
838 if (len == 0) 828 if (len == 0)
839 goto out_invalid_addre 829 goto out_invalid_address;
840 ctx->nfs_server.addrlen = len; 830 ctx->nfs_server.addrlen = len;
841 break; 831 break;
842 case Opt_clientaddr: 832 case Opt_clientaddr:
843 trace_nfs_mount_assign(param-> 833 trace_nfs_mount_assign(param->key, param->string);
844 kfree(ctx->client_address); 834 kfree(ctx->client_address);
845 ctx->client_address = param->s 835 ctx->client_address = param->string;
846 param->string = NULL; 836 param->string = NULL;
847 break; 837 break;
848 case Opt_mounthost: 838 case Opt_mounthost:
849 trace_nfs_mount_assign(param-> 839 trace_nfs_mount_assign(param->key, param->string);
850 kfree(ctx->mount_server.hostna 840 kfree(ctx->mount_server.hostname);
851 ctx->mount_server.hostname = p 841 ctx->mount_server.hostname = param->string;
852 param->string = NULL; 842 param->string = NULL;
853 break; 843 break;
854 case Opt_mountaddr: 844 case Opt_mountaddr:
855 trace_nfs_mount_assign(param-> 845 trace_nfs_mount_assign(param->key, param->string);
856 len = rpc_pton(fc->net_ns, par 846 len = rpc_pton(fc->net_ns, param->string, param->size,
857 &ctx->mount_ser 847 &ctx->mount_server.address,
858 sizeof(ctx->mou 848 sizeof(ctx->mount_server._address));
859 if (len == 0) 849 if (len == 0)
860 goto out_invalid_addre 850 goto out_invalid_address;
861 ctx->mount_server.addrlen = le 851 ctx->mount_server.addrlen = len;
862 break; 852 break;
863 case Opt_nconnect: 853 case Opt_nconnect:
864 trace_nfs_mount_assign(param-> 854 trace_nfs_mount_assign(param->key, param->string);
865 if (result.uint_32 < 1 || resu 855 if (result.uint_32 < 1 || result.uint_32 > NFS_MAX_CONNECTIONS)
866 goto out_of_bounds; 856 goto out_of_bounds;
867 ctx->nfs_server.nconnect = res 857 ctx->nfs_server.nconnect = result.uint_32;
868 break; 858 break;
869 case Opt_max_connect: 859 case Opt_max_connect:
870 trace_nfs_mount_assign(param-> 860 trace_nfs_mount_assign(param->key, param->string);
871 if (result.uint_32 < 1 || resu 861 if (result.uint_32 < 1 || result.uint_32 > NFS_MAX_TRANSPORTS)
872 goto out_of_bounds; 862 goto out_of_bounds;
873 ctx->nfs_server.max_connect = 863 ctx->nfs_server.max_connect = result.uint_32;
874 break; 864 break;
875 case Opt_lookupcache: 865 case Opt_lookupcache:
876 trace_nfs_mount_assign(param-> 866 trace_nfs_mount_assign(param->key, param->string);
877 switch (result.uint_32) { 867 switch (result.uint_32) {
878 case Opt_lookupcache_all: 868 case Opt_lookupcache_all:
879 ctx->flags &= ~(NFS_MO 869 ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE);
880 break; 870 break;
881 case Opt_lookupcache_positive: 871 case Opt_lookupcache_positive:
882 ctx->flags &= ~NFS_MOU 872 ctx->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE;
883 ctx->flags |= NFS_MOUN 873 ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG;
884 break; 874 break;
885 case Opt_lookupcache_none: 875 case Opt_lookupcache_none:
886 ctx->flags |= NFS_MOUN 876 ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE;
887 break; 877 break;
888 default: 878 default:
889 goto out_invalid_value 879 goto out_invalid_value;
890 } 880 }
891 break; 881 break;
892 case Opt_local_lock: 882 case Opt_local_lock:
893 trace_nfs_mount_assign(param-> 883 trace_nfs_mount_assign(param->key, param->string);
894 switch (result.uint_32) { 884 switch (result.uint_32) {
895 case Opt_local_lock_all: 885 case Opt_local_lock_all:
896 ctx->flags |= (NFS_MOU 886 ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK |
897 NFS_MOU 887 NFS_MOUNT_LOCAL_FCNTL);
898 break; 888 break;
899 case Opt_local_lock_flock: 889 case Opt_local_lock_flock:
900 ctx->flags |= NFS_MOUN 890 ctx->flags |= NFS_MOUNT_LOCAL_FLOCK;
901 break; 891 break;
902 case Opt_local_lock_posix: 892 case Opt_local_lock_posix:
903 ctx->flags |= NFS_MOUN 893 ctx->flags |= NFS_MOUNT_LOCAL_FCNTL;
904 break; 894 break;
905 case Opt_local_lock_none: 895 case Opt_local_lock_none:
906 ctx->flags &= ~(NFS_MO 896 ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
907 NFS_MO 897 NFS_MOUNT_LOCAL_FCNTL);
908 break; 898 break;
909 default: 899 default:
910 goto out_invalid_value 900 goto out_invalid_value;
911 } 901 }
912 break; 902 break;
913 case Opt_write: 903 case Opt_write:
914 trace_nfs_mount_assign(param-> 904 trace_nfs_mount_assign(param->key, param->string);
915 switch (result.uint_32) { 905 switch (result.uint_32) {
916 case Opt_write_lazy: 906 case Opt_write_lazy:
917 ctx->flags &= 907 ctx->flags &=
918 ~(NFS_MOUNT_WR 908 ~(NFS_MOUNT_WRITE_EAGER | NFS_MOUNT_WRITE_WAIT);
919 break; 909 break;
920 case Opt_write_eager: 910 case Opt_write_eager:
921 ctx->flags |= NFS_MOUN 911 ctx->flags |= NFS_MOUNT_WRITE_EAGER;
922 ctx->flags &= ~NFS_MOU 912 ctx->flags &= ~NFS_MOUNT_WRITE_WAIT;
923 break; 913 break;
924 case Opt_write_wait: 914 case Opt_write_wait:
925 ctx->flags |= 915 ctx->flags |=
926 NFS_MOUNT_WRIT 916 NFS_MOUNT_WRITE_EAGER | NFS_MOUNT_WRITE_WAIT;
927 break; 917 break;
928 default: 918 default:
929 goto out_invalid_value 919 goto out_invalid_value;
930 } 920 }
931 break; 921 break;
932 922
933 /* 923 /*
934 * Special options 924 * Special options
935 */ 925 */
936 case Opt_sloppy: 926 case Opt_sloppy:
937 ctx->sloppy = true; 927 ctx->sloppy = true;
938 break; 928 break;
939 } 929 }
940 930
941 return 0; 931 return 0;
942 932
943 out_invalid_value: 933 out_invalid_value:
944 return nfs_invalf(fc, "NFS: Bad mount 934 return nfs_invalf(fc, "NFS: Bad mount option value specified");
945 out_invalid_address: 935 out_invalid_address:
946 return nfs_invalf(fc, "NFS: Bad IP add 936 return nfs_invalf(fc, "NFS: Bad IP address specified");
947 out_of_bounds: 937 out_of_bounds:
948 return nfs_invalf(fc, "NFS: Value for 938 return nfs_invalf(fc, "NFS: Value for '%s' out of range", param->key);
949 out_bad_transport: 939 out_bad_transport:
950 return nfs_invalf(fc, "NFS: Unrecogniz 940 return nfs_invalf(fc, "NFS: Unrecognized transport protocol");
951 } 941 }
952 942
953 /* 943 /*
954 * Split fc->source into "hostname:export_path 944 * Split fc->source into "hostname:export_path".
955 * 945 *
956 * The leftmost colon demarks the split betwee 946 * The leftmost colon demarks the split between the server's hostname
957 * and the export path. If the hostname start 947 * and the export path. If the hostname starts with a left square
958 * bracket, then it may contain colons. 948 * bracket, then it may contain colons.
959 * 949 *
960 * Note: caller frees hostname and export path 950 * Note: caller frees hostname and export path, even on error.
961 */ 951 */
962 static int nfs_parse_source(struct fs_context 952 static int nfs_parse_source(struct fs_context *fc,
963 size_t maxnamlen, 953 size_t maxnamlen, size_t maxpathlen)
964 { 954 {
965 struct nfs_fs_context *ctx = nfs_fc2co 955 struct nfs_fs_context *ctx = nfs_fc2context(fc);
966 const char *dev_name = fc->source; 956 const char *dev_name = fc->source;
967 size_t len; 957 size_t len;
968 const char *end; 958 const char *end;
969 959
970 if (unlikely(!dev_name || !*dev_name)) 960 if (unlikely(!dev_name || !*dev_name))
971 return -EINVAL; 961 return -EINVAL;
972 962
973 /* Is the host name protected with squ 963 /* Is the host name protected with square brakcets? */
974 if (*dev_name == '[') { 964 if (*dev_name == '[') {
975 end = strchr(++dev_name, ']'); 965 end = strchr(++dev_name, ']');
976 if (end == NULL || end[1] != ' 966 if (end == NULL || end[1] != ':')
977 goto out_bad_devname; 967 goto out_bad_devname;
978 968
979 len = end - dev_name; 969 len = end - dev_name;
980 end++; 970 end++;
981 } else { 971 } else {
982 const char *comma; 972 const char *comma;
983 973
984 end = strchr(dev_name, ':'); 974 end = strchr(dev_name, ':');
985 if (end == NULL) 975 if (end == NULL)
986 goto out_bad_devname; 976 goto out_bad_devname;
987 len = end - dev_name; 977 len = end - dev_name;
988 978
989 /* kill possible hostname list 979 /* kill possible hostname list: not supported */
990 comma = memchr(dev_name, ',', 980 comma = memchr(dev_name, ',', len);
991 if (comma) 981 if (comma)
992 len = comma - dev_name 982 len = comma - dev_name;
993 } 983 }
994 984
995 if (len > maxnamlen) 985 if (len > maxnamlen)
996 goto out_hostname; 986 goto out_hostname;
997 987
998 kfree(ctx->nfs_server.hostname); 988 kfree(ctx->nfs_server.hostname);
999 989
1000 /* N.B. caller will free nfs_server.h 990 /* N.B. caller will free nfs_server.hostname in all cases */
1001 ctx->nfs_server.hostname = kmemdup_nu 991 ctx->nfs_server.hostname = kmemdup_nul(dev_name, len, GFP_KERNEL);
1002 if (!ctx->nfs_server.hostname) 992 if (!ctx->nfs_server.hostname)
1003 goto out_nomem; 993 goto out_nomem;
1004 len = strlen(++end); 994 len = strlen(++end);
1005 if (len > maxpathlen) 995 if (len > maxpathlen)
1006 goto out_path; 996 goto out_path;
1007 ctx->nfs_server.export_path = kmemdup 997 ctx->nfs_server.export_path = kmemdup_nul(end, len, GFP_KERNEL);
1008 if (!ctx->nfs_server.export_path) 998 if (!ctx->nfs_server.export_path)
1009 goto out_nomem; 999 goto out_nomem;
1010 1000
1011 trace_nfs_mount_path(ctx->nfs_server. 1001 trace_nfs_mount_path(ctx->nfs_server.export_path);
1012 return 0; 1002 return 0;
1013 1003
1014 out_bad_devname: 1004 out_bad_devname:
1015 return nfs_invalf(fc, "NFS: device na 1005 return nfs_invalf(fc, "NFS: device name not in host:path format");
1016 out_nomem: 1006 out_nomem:
1017 nfs_errorf(fc, "NFS: not enough memor 1007 nfs_errorf(fc, "NFS: not enough memory to parse device name");
1018 return -ENOMEM; 1008 return -ENOMEM;
1019 out_hostname: 1009 out_hostname:
1020 nfs_errorf(fc, "NFS: server hostname 1010 nfs_errorf(fc, "NFS: server hostname too long");
1021 return -ENAMETOOLONG; 1011 return -ENAMETOOLONG;
1022 out_path: 1012 out_path:
1023 nfs_errorf(fc, "NFS: export pathname 1013 nfs_errorf(fc, "NFS: export pathname too long");
1024 return -ENAMETOOLONG; 1014 return -ENAMETOOLONG;
1025 } 1015 }
1026 1016
1027 static inline bool is_remount_fc(struct fs_co 1017 static inline bool is_remount_fc(struct fs_context *fc)
1028 { 1018 {
1029 return fc->root != NULL; 1019 return fc->root != NULL;
1030 } 1020 }
1031 1021
1032 /* 1022 /*
1033 * Parse monolithic NFS2/NFS3 mount data 1023 * Parse monolithic NFS2/NFS3 mount data
1034 * - fills in the mount root filehandle 1024 * - fills in the mount root filehandle
1035 * 1025 *
1036 * For option strings, user space handles the 1026 * For option strings, user space handles the following behaviors:
1037 * 1027 *
1038 * + DNS: mapping server host name to IP addr 1028 * + DNS: mapping server host name to IP address ("addr=" option)
1039 * 1029 *
1040 * + failure mode: how to behave if a mount r 1030 * + failure mode: how to behave if a mount request can't be handled
1041 * immediately ("fg/bg" option) 1031 * immediately ("fg/bg" option)
1042 * 1032 *
1043 * + retry: how often to retry a mount reques 1033 * + retry: how often to retry a mount request ("retry=" option)
1044 * 1034 *
1045 * + breaking back: trying proto=udp after pr 1035 * + breaking back: trying proto=udp after proto=tcp, v2 after v3,
1046 * mountproto=tcp after mountproto=udp, and 1036 * mountproto=tcp after mountproto=udp, and so on
1047 */ 1037 */
1048 static int nfs23_parse_monolithic(struct fs_c 1038 static int nfs23_parse_monolithic(struct fs_context *fc,
1049 struct nfs_ 1039 struct nfs_mount_data *data)
1050 { 1040 {
1051 struct nfs_fs_context *ctx = nfs_fc2c 1041 struct nfs_fs_context *ctx = nfs_fc2context(fc);
1052 struct nfs_fh *mntfh = ctx->mntfh; 1042 struct nfs_fh *mntfh = ctx->mntfh;
1053 struct sockaddr_storage *sap = &ctx-> 1043 struct sockaddr_storage *sap = &ctx->nfs_server._address;
1054 int extra_flags = NFS_MOUNT_LEGACY_IN 1044 int extra_flags = NFS_MOUNT_LEGACY_INTERFACE;
1055 int ret; 1045 int ret;
1056 1046
1057 if (data == NULL) 1047 if (data == NULL)
1058 goto out_no_data; 1048 goto out_no_data;
1059 1049
1060 ctx->version = NFS_DEFAULT_VERSION; 1050 ctx->version = NFS_DEFAULT_VERSION;
1061 switch (data->version) { 1051 switch (data->version) {
1062 case 1: 1052 case 1:
1063 data->namlen = 0; 1053 data->namlen = 0;
1064 fallthrough; 1054 fallthrough;
1065 case 2: 1055 case 2:
1066 data->bsize = 0; 1056 data->bsize = 0;
1067 fallthrough; 1057 fallthrough;
1068 case 3: 1058 case 3:
1069 if (data->flags & NFS_MOUNT_V 1059 if (data->flags & NFS_MOUNT_VER3)
1070 goto out_no_v3; 1060 goto out_no_v3;
1071 data->root.size = NFS2_FHSIZE 1061 data->root.size = NFS2_FHSIZE;
1072 memcpy(data->root.data, data- 1062 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
1073 /* Turn off security negotiat 1063 /* Turn off security negotiation */
1074 extra_flags |= NFS_MOUNT_SECF 1064 extra_flags |= NFS_MOUNT_SECFLAVOUR;
1075 fallthrough; 1065 fallthrough;
1076 case 4: 1066 case 4:
1077 if (data->flags & NFS_MOUNT_S 1067 if (data->flags & NFS_MOUNT_SECFLAVOUR)
1078 goto out_no_sec; 1068 goto out_no_sec;
1079 fallthrough; 1069 fallthrough;
1080 case 5: 1070 case 5:
1081 memset(data->context, 0, size 1071 memset(data->context, 0, sizeof(data->context));
1082 fallthrough; 1072 fallthrough;
1083 case 6: 1073 case 6:
1084 if (data->flags & NFS_MOUNT_V 1074 if (data->flags & NFS_MOUNT_VER3) {
1085 if (data->root.size > 1075 if (data->root.size > NFS3_FHSIZE || data->root.size == 0)
1086 goto out_inva 1076 goto out_invalid_fh;
1087 mntfh->size = data->r 1077 mntfh->size = data->root.size;
1088 ctx->version = 3; 1078 ctx->version = 3;
1089 } else { 1079 } else {
1090 mntfh->size = NFS2_FH 1080 mntfh->size = NFS2_FHSIZE;
1091 ctx->version = 2; 1081 ctx->version = 2;
1092 } 1082 }
1093 1083
1094 1084
1095 memcpy(mntfh->data, data->roo 1085 memcpy(mntfh->data, data->root.data, mntfh->size);
1096 if (mntfh->size < sizeof(mntf 1086 if (mntfh->size < sizeof(mntfh->data))
1097 memset(mntfh->data + 1087 memset(mntfh->data + mntfh->size, 0,
1098 sizeof(mntfh-> 1088 sizeof(mntfh->data) - mntfh->size);
1099 1089
1100 /* 1090 /*
1101 * for proto == XPRT_TRANSPOR 1091 * for proto == XPRT_TRANSPORT_UDP, which is what uses
1102 * to_exponential, implying s 1092 * to_exponential, implying shift: limit the shift value
1103 * to BITS_PER_LONG (majortim 1093 * to BITS_PER_LONG (majortimeo is unsigned long)
1104 */ 1094 */
1105 if (!(data->flags & NFS_MOUNT 1095 if (!(data->flags & NFS_MOUNT_TCP)) /* this will be UDP */
1106 if (data->retrans >= 1096 if (data->retrans >= 64) /* shift value is too large */
1107 goto out_inva 1097 goto out_invalid_data;
1108 1098
1109 /* 1099 /*
1110 * Translate to nfs_fs_contex 1100 * Translate to nfs_fs_context, which nfs_fill_super
1111 * can deal with. 1101 * can deal with.
1112 */ 1102 */
1113 ctx->flags = data->flags 1103 ctx->flags = data->flags & NFS_MOUNT_FLAGMASK;
1114 ctx->flags |= extra_flag 1104 ctx->flags |= extra_flags;
1115 ctx->rsize = data->rsize 1105 ctx->rsize = data->rsize;
1116 ctx->wsize = data->wsize 1106 ctx->wsize = data->wsize;
1117 ctx->timeo = data->timeo 1107 ctx->timeo = data->timeo;
1118 ctx->retrans = data->retra 1108 ctx->retrans = data->retrans;
1119 ctx->acregmin = data->acreg 1109 ctx->acregmin = data->acregmin;
1120 ctx->acregmax = data->acreg 1110 ctx->acregmax = data->acregmax;
1121 ctx->acdirmin = data->acdir 1111 ctx->acdirmin = data->acdirmin;
1122 ctx->acdirmax = data->acdir 1112 ctx->acdirmax = data->acdirmax;
1123 ctx->need_mount = false; 1113 ctx->need_mount = false;
1124 1114
1125 if (!is_remount_fc(fc)) { 1115 if (!is_remount_fc(fc)) {
1126 memcpy(sap, &data->ad 1116 memcpy(sap, &data->addr, sizeof(data->addr));
1127 ctx->nfs_server.addrl 1117 ctx->nfs_server.addrlen = sizeof(data->addr);
1128 ctx->nfs_server.port 1118 ctx->nfs_server.port = ntohs(data->addr.sin_port);
1129 } 1119 }
1130 1120
1131 if (sap->ss_family != AF_INET 1121 if (sap->ss_family != AF_INET ||
1132 !nfs_verify_server_addres 1122 !nfs_verify_server_address(sap))
1133 goto out_no_address; 1123 goto out_no_address;
1134 1124
1135 if (!(data->flags & NFS_MOUNT 1125 if (!(data->flags & NFS_MOUNT_TCP))
1136 ctx->nfs_server.proto 1126 ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP;
1137 /* N.B. caller will free nfs_ 1127 /* N.B. caller will free nfs_server.hostname in all cases */
1138 ctx->nfs_server.hostname = ks 1128 ctx->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL);
1139 if (!ctx->nfs_server.hostname 1129 if (!ctx->nfs_server.hostname)
1140 goto out_nomem; 1130 goto out_nomem;
1141 1131
1142 ctx->namlen = dat 1132 ctx->namlen = data->namlen;
1143 ctx->bsize = dat 1133 ctx->bsize = data->bsize;
1144 1134
1145 if (data->flags & NFS_MOUNT_S 1135 if (data->flags & NFS_MOUNT_SECFLAVOUR)
1146 ctx->selected_flavor 1136 ctx->selected_flavor = data->pseudoflavor;
1147 else 1137 else
1148 ctx->selected_flavor 1138 ctx->selected_flavor = RPC_AUTH_UNIX;
1149 1139
1150 if (!(data->flags & NFS_MOUNT 1140 if (!(data->flags & NFS_MOUNT_NONLM))
1151 ctx->flags &= ~(NFS_M 1141 ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK|
1152 NFS_ 1142 NFS_MOUNT_LOCAL_FCNTL);
1153 else 1143 else
1154 ctx->flags |= (NFS_MO 1144 ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK|
1155 NFS_M 1145 NFS_MOUNT_LOCAL_FCNTL);
1156 1146
1157 /* 1147 /*
1158 * The legacy version 6 binar 1148 * The legacy version 6 binary mount data from userspace has a
1159 * field used only to transpo 1149 * field used only to transport selinux information into the
1160 * kernel. To continue to su 1150 * kernel. To continue to support that functionality we
1161 * have a touch of selinux kn 1151 * have a touch of selinux knowledge here in the NFS code. The
1162 * userspace code converted c 1152 * userspace code converted context=blah to just blah so we are
1163 * converting back to the ful 1153 * converting back to the full string selinux understands.
1164 */ 1154 */
1165 if (data->context[0]){ 1155 if (data->context[0]){
1166 #ifdef CONFIG_SECURITY_SELINUX 1156 #ifdef CONFIG_SECURITY_SELINUX
1167 int ret; 1157 int ret;
1168 1158
1169 data->context[NFS_MAX 1159 data->context[NFS_MAX_CONTEXT_LEN] = '\0';
1170 ret = vfs_parse_fs_st 1160 ret = vfs_parse_fs_string(fc, "context",
1171 1161 data->context, strlen(data->context));
1172 if (ret < 0) 1162 if (ret < 0)
1173 return ret; 1163 return ret;
1174 #else 1164 #else
1175 return -EINVAL; 1165 return -EINVAL;
1176 #endif 1166 #endif
1177 } 1167 }
1178 1168
1179 break; 1169 break;
1180 default: 1170 default:
1181 goto generic; 1171 goto generic;
1182 } 1172 }
1183 1173
1184 ret = nfs_validate_transport_protocol 1174 ret = nfs_validate_transport_protocol(fc, ctx);
1185 if (ret) 1175 if (ret)
1186 return ret; 1176 return ret;
1187 1177
1188 ctx->skip_reconfig_option_check = tru 1178 ctx->skip_reconfig_option_check = true;
1189 return 0; 1179 return 0;
1190 1180
1191 generic: 1181 generic:
1192 return generic_parse_monolithic(fc, d 1182 return generic_parse_monolithic(fc, data);
1193 1183
1194 out_no_data: 1184 out_no_data:
1195 if (is_remount_fc(fc)) { 1185 if (is_remount_fc(fc)) {
1196 ctx->skip_reconfig_option_che 1186 ctx->skip_reconfig_option_check = true;
1197 return 0; 1187 return 0;
1198 } 1188 }
1199 return nfs_invalf(fc, "NFS: mount pro 1189 return nfs_invalf(fc, "NFS: mount program didn't pass any mount data");
1200 1190
1201 out_no_v3: 1191 out_no_v3:
1202 return nfs_invalf(fc, "NFS: nfs_mount 1192 return nfs_invalf(fc, "NFS: nfs_mount_data version does not support v3");
1203 1193
1204 out_no_sec: 1194 out_no_sec:
1205 return nfs_invalf(fc, "NFS: nfs_mount 1195 return nfs_invalf(fc, "NFS: nfs_mount_data version supports only AUTH_SYS");
1206 1196
1207 out_nomem: 1197 out_nomem:
1208 return -ENOMEM; 1198 return -ENOMEM;
1209 1199
1210 out_no_address: 1200 out_no_address:
1211 return nfs_invalf(fc, "NFS: mount pro 1201 return nfs_invalf(fc, "NFS: mount program didn't pass remote address");
1212 1202
1213 out_invalid_fh: 1203 out_invalid_fh:
1214 return nfs_invalf(fc, "NFS: invalid r 1204 return nfs_invalf(fc, "NFS: invalid root filehandle");
1215 1205
1216 out_invalid_data: 1206 out_invalid_data:
1217 return nfs_invalf(fc, "NFS: invalid b 1207 return nfs_invalf(fc, "NFS: invalid binary mount data");
1218 } 1208 }
1219 1209
1220 #if IS_ENABLED(CONFIG_NFS_V4) 1210 #if IS_ENABLED(CONFIG_NFS_V4)
1221 struct compat_nfs_string { 1211 struct compat_nfs_string {
1222 compat_uint_t len; 1212 compat_uint_t len;
1223 compat_uptr_t data; 1213 compat_uptr_t data;
1224 }; 1214 };
1225 1215
1226 static inline void compat_nfs_string(struct n 1216 static inline void compat_nfs_string(struct nfs_string *dst,
1227 struct c 1217 struct compat_nfs_string *src)
1228 { 1218 {
1229 dst->data = compat_ptr(src->data); 1219 dst->data = compat_ptr(src->data);
1230 dst->len = src->len; 1220 dst->len = src->len;
1231 } 1221 }
1232 1222
1233 struct compat_nfs4_mount_data_v1 { 1223 struct compat_nfs4_mount_data_v1 {
1234 compat_int_t version; 1224 compat_int_t version;
1235 compat_int_t flags; 1225 compat_int_t flags;
1236 compat_int_t rsize; 1226 compat_int_t rsize;
1237 compat_int_t wsize; 1227 compat_int_t wsize;
1238 compat_int_t timeo; 1228 compat_int_t timeo;
1239 compat_int_t retrans; 1229 compat_int_t retrans;
1240 compat_int_t acregmin; 1230 compat_int_t acregmin;
1241 compat_int_t acregmax; 1231 compat_int_t acregmax;
1242 compat_int_t acdirmin; 1232 compat_int_t acdirmin;
1243 compat_int_t acdirmax; 1233 compat_int_t acdirmax;
1244 struct compat_nfs_string client_addr; 1234 struct compat_nfs_string client_addr;
1245 struct compat_nfs_string mnt_path; 1235 struct compat_nfs_string mnt_path;
1246 struct compat_nfs_string hostname; 1236 struct compat_nfs_string hostname;
1247 compat_uint_t host_addrlen; 1237 compat_uint_t host_addrlen;
1248 compat_uptr_t host_addr; 1238 compat_uptr_t host_addr;
1249 compat_int_t proto; 1239 compat_int_t proto;
1250 compat_int_t auth_flavourlen; 1240 compat_int_t auth_flavourlen;
1251 compat_uptr_t auth_flavours; 1241 compat_uptr_t auth_flavours;
1252 }; 1242 };
1253 1243
1254 static void nfs4_compat_mount_data_conv(struc 1244 static void nfs4_compat_mount_data_conv(struct nfs4_mount_data *data)
1255 { 1245 {
1256 struct compat_nfs4_mount_data_v1 *com 1246 struct compat_nfs4_mount_data_v1 *compat =
1257 (struct compat_nfs4_m 1247 (struct compat_nfs4_mount_data_v1 *)data;
1258 1248
1259 /* copy the fields backwards */ 1249 /* copy the fields backwards */
1260 data->auth_flavours = compat_ptr(comp 1250 data->auth_flavours = compat_ptr(compat->auth_flavours);
1261 data->auth_flavourlen = compat->auth_ 1251 data->auth_flavourlen = compat->auth_flavourlen;
1262 data->proto = compat->proto; 1252 data->proto = compat->proto;
1263 data->host_addr = compat_ptr(compat-> 1253 data->host_addr = compat_ptr(compat->host_addr);
1264 data->host_addrlen = compat->host_add 1254 data->host_addrlen = compat->host_addrlen;
1265 compat_nfs_string(&data->hostname, &c 1255 compat_nfs_string(&data->hostname, &compat->hostname);
1266 compat_nfs_string(&data->mnt_path, &c 1256 compat_nfs_string(&data->mnt_path, &compat->mnt_path);
1267 compat_nfs_string(&data->client_addr, 1257 compat_nfs_string(&data->client_addr, &compat->client_addr);
1268 data->acdirmax = compat->acdirmax; 1258 data->acdirmax = compat->acdirmax;
1269 data->acdirmin = compat->acdirmin; 1259 data->acdirmin = compat->acdirmin;
1270 data->acregmax = compat->acregmax; 1260 data->acregmax = compat->acregmax;
1271 data->acregmin = compat->acregmin; 1261 data->acregmin = compat->acregmin;
1272 data->retrans = compat->retrans; 1262 data->retrans = compat->retrans;
1273 data->timeo = compat->timeo; 1263 data->timeo = compat->timeo;
1274 data->wsize = compat->wsize; 1264 data->wsize = compat->wsize;
1275 data->rsize = compat->rsize; 1265 data->rsize = compat->rsize;
1276 data->flags = compat->flags; 1266 data->flags = compat->flags;
1277 data->version = compat->version; 1267 data->version = compat->version;
1278 } 1268 }
1279 1269
1280 /* 1270 /*
1281 * Validate NFSv4 mount options 1271 * Validate NFSv4 mount options
1282 */ 1272 */
1283 static int nfs4_parse_monolithic(struct fs_co 1273 static int nfs4_parse_monolithic(struct fs_context *fc,
1284 struct nfs4_ 1274 struct nfs4_mount_data *data)
1285 { 1275 {
1286 struct nfs_fs_context *ctx = nfs_fc2c 1276 struct nfs_fs_context *ctx = nfs_fc2context(fc);
1287 struct sockaddr_storage *sap = &ctx-> 1277 struct sockaddr_storage *sap = &ctx->nfs_server._address;
1288 int ret; 1278 int ret;
1289 char *c; 1279 char *c;
1290 1280
1291 if (!data) { 1281 if (!data) {
1292 if (is_remount_fc(fc)) 1282 if (is_remount_fc(fc))
1293 goto done; 1283 goto done;
1294 return nfs_invalf(fc, 1284 return nfs_invalf(fc,
1295 "NFS4: mount program 1285 "NFS4: mount program didn't pass any mount data");
1296 } 1286 }
1297 1287
1298 ctx->version = 4; 1288 ctx->version = 4;
1299 1289
1300 if (data->version != 1) 1290 if (data->version != 1)
1301 return generic_parse_monolith 1291 return generic_parse_monolithic(fc, data);
1302 1292
1303 if (in_compat_syscall()) 1293 if (in_compat_syscall())
1304 nfs4_compat_mount_data_conv(d 1294 nfs4_compat_mount_data_conv(data);
1305 1295
1306 if (data->host_addrlen > sizeof(ctx-> 1296 if (data->host_addrlen > sizeof(ctx->nfs_server.address))
1307 goto out_no_address; 1297 goto out_no_address;
1308 if (data->host_addrlen == 0) 1298 if (data->host_addrlen == 0)
1309 goto out_no_address; 1299 goto out_no_address;
1310 ctx->nfs_server.addrlen = data->host_ 1300 ctx->nfs_server.addrlen = data->host_addrlen;
1311 if (copy_from_user(sap, data->host_ad 1301 if (copy_from_user(sap, data->host_addr, data->host_addrlen))
1312 return -EFAULT; 1302 return -EFAULT;
1313 if (!nfs_verify_server_address(sap)) 1303 if (!nfs_verify_server_address(sap))
1314 goto out_no_address; 1304 goto out_no_address;
1315 ctx->nfs_server.port = ntohs(((struct 1305 ctx->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port);
1316 1306
1317 if (data->auth_flavourlen) { 1307 if (data->auth_flavourlen) {
1318 rpc_authflavor_t pseudoflavor 1308 rpc_authflavor_t pseudoflavor;
1319 1309
1320 if (data->auth_flavourlen > 1 1310 if (data->auth_flavourlen > 1)
1321 goto out_inval_auth; 1311 goto out_inval_auth;
1322 if (copy_from_user(&pseudofla 1312 if (copy_from_user(&pseudoflavor, data->auth_flavours,
1323 sizeof(pse 1313 sizeof(pseudoflavor)))
1324 return -EFAULT; 1314 return -EFAULT;
1325 ctx->selected_flavor = pseudo 1315 ctx->selected_flavor = pseudoflavor;
1326 } else { 1316 } else {
1327 ctx->selected_flavor = RPC_AU 1317 ctx->selected_flavor = RPC_AUTH_UNIX;
1328 } 1318 }
1329 1319
1330 c = strndup_user(data->hostname.data, 1320 c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN);
1331 if (IS_ERR(c)) 1321 if (IS_ERR(c))
1332 return PTR_ERR(c); 1322 return PTR_ERR(c);
1333 ctx->nfs_server.hostname = c; 1323 ctx->nfs_server.hostname = c;
1334 1324
1335 c = strndup_user(data->mnt_path.data, 1325 c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN);
1336 if (IS_ERR(c)) 1326 if (IS_ERR(c))
1337 return PTR_ERR(c); 1327 return PTR_ERR(c);
1338 ctx->nfs_server.export_path = c; 1328 ctx->nfs_server.export_path = c;
1339 trace_nfs_mount_path(c); 1329 trace_nfs_mount_path(c);
1340 1330
1341 c = strndup_user(data->client_addr.da 1331 c = strndup_user(data->client_addr.data, 16);
1342 if (IS_ERR(c)) 1332 if (IS_ERR(c))
1343 return PTR_ERR(c); 1333 return PTR_ERR(c);
1344 ctx->client_address = c; 1334 ctx->client_address = c;
1345 1335
1346 /* 1336 /*
1347 * Translate to nfs_fs_context, which 1337 * Translate to nfs_fs_context, which nfs_fill_super
1348 * can deal with. 1338 * can deal with.
1349 */ 1339 */
1350 1340
1351 ctx->flags = data->flags & NFS4_ 1341 ctx->flags = data->flags & NFS4_MOUNT_FLAGMASK;
1352 ctx->rsize = data->rsize; 1342 ctx->rsize = data->rsize;
1353 ctx->wsize = data->wsize; 1343 ctx->wsize = data->wsize;
1354 ctx->timeo = data->timeo; 1344 ctx->timeo = data->timeo;
1355 ctx->retrans = data->retrans; 1345 ctx->retrans = data->retrans;
1356 ctx->acregmin = data->acregmin; 1346 ctx->acregmin = data->acregmin;
1357 ctx->acregmax = data->acregmax; 1347 ctx->acregmax = data->acregmax;
1358 ctx->acdirmin = data->acdirmin; 1348 ctx->acdirmin = data->acdirmin;
1359 ctx->acdirmax = data->acdirmax; 1349 ctx->acdirmax = data->acdirmax;
1360 ctx->nfs_server.protocol = data->prot 1350 ctx->nfs_server.protocol = data->proto;
1361 ret = nfs_validate_transport_protocol 1351 ret = nfs_validate_transport_protocol(fc, ctx);
1362 if (ret) 1352 if (ret)
1363 return ret; 1353 return ret;
1364 done: 1354 done:
1365 ctx->skip_reconfig_option_check = tru 1355 ctx->skip_reconfig_option_check = true;
1366 return 0; 1356 return 0;
1367 1357
1368 out_inval_auth: 1358 out_inval_auth:
1369 return nfs_invalf(fc, "NFS4: Invalid 1359 return nfs_invalf(fc, "NFS4: Invalid number of RPC auth flavours %d",
1370 data->auth_flavourlen); 1360 data->auth_flavourlen);
1371 1361
1372 out_no_address: 1362 out_no_address:
1373 return nfs_invalf(fc, "NFS4: mount pr 1363 return nfs_invalf(fc, "NFS4: mount program didn't pass remote address");
1374 } 1364 }
1375 #endif 1365 #endif
1376 1366
1377 /* 1367 /*
1378 * Parse a monolithic block of data from sys_ 1368 * Parse a monolithic block of data from sys_mount().
1379 */ 1369 */
1380 static int nfs_fs_context_parse_monolithic(st 1370 static int nfs_fs_context_parse_monolithic(struct fs_context *fc,
1381 vo 1371 void *data)
1382 { 1372 {
1383 if (fc->fs_type == &nfs_fs_type) 1373 if (fc->fs_type == &nfs_fs_type)
1384 return nfs23_parse_monolithic 1374 return nfs23_parse_monolithic(fc, data);
1385 1375
1386 #if IS_ENABLED(CONFIG_NFS_V4) 1376 #if IS_ENABLED(CONFIG_NFS_V4)
1387 if (fc->fs_type == &nfs4_fs_type) 1377 if (fc->fs_type == &nfs4_fs_type)
1388 return nfs4_parse_monolithic( 1378 return nfs4_parse_monolithic(fc, data);
1389 #endif 1379 #endif
1390 1380
1391 return nfs_invalf(fc, "NFS: Unsupport 1381 return nfs_invalf(fc, "NFS: Unsupported monolithic data version");
1392 } 1382 }
1393 1383
1394 /* 1384 /*
1395 * Validate the preparsed information in the 1385 * Validate the preparsed information in the config.
1396 */ 1386 */
1397 static int nfs_fs_context_validate(struct fs_ 1387 static int nfs_fs_context_validate(struct fs_context *fc)
1398 { 1388 {
1399 struct nfs_fs_context *ctx = nfs_fc2c 1389 struct nfs_fs_context *ctx = nfs_fc2context(fc);
1400 struct nfs_subversion *nfs_mod; 1390 struct nfs_subversion *nfs_mod;
1401 struct sockaddr_storage *sap = &ctx-> 1391 struct sockaddr_storage *sap = &ctx->nfs_server._address;
1402 int max_namelen = PAGE_SIZE; 1392 int max_namelen = PAGE_SIZE;
1403 int max_pathlen = NFS_MAXPATHLEN; 1393 int max_pathlen = NFS_MAXPATHLEN;
1404 int port = 0; 1394 int port = 0;
1405 int ret; 1395 int ret;
1406 1396
1407 if (!fc->source) 1397 if (!fc->source)
1408 goto out_no_device_name; 1398 goto out_no_device_name;
1409 1399
1410 /* Check for sanity first. */ 1400 /* Check for sanity first. */
1411 if (ctx->minorversion && ctx->version 1401 if (ctx->minorversion && ctx->version != 4)
1412 goto out_minorversion_mismatc 1402 goto out_minorversion_mismatch;
1413 1403
1414 if (ctx->options & NFS_OPTION_MIGRATI 1404 if (ctx->options & NFS_OPTION_MIGRATION &&
1415 (ctx->version != 4 || ctx->minorv 1405 (ctx->version != 4 || ctx->minorversion != 0))
1416 goto out_migration_misuse; 1406 goto out_migration_misuse;
1417 1407
1418 /* Verify that any proto=/mountproto= 1408 /* Verify that any proto=/mountproto= options match the address
1419 * families in the addr=/mountaddr= o 1409 * families in the addr=/mountaddr= options.
1420 */ 1410 */
1421 if (ctx->protofamily != AF_UNSPEC && 1411 if (ctx->protofamily != AF_UNSPEC &&
1422 ctx->protofamily != ctx->nfs_serv 1412 ctx->protofamily != ctx->nfs_server.address.sa_family)
1423 goto out_proto_mismatch; 1413 goto out_proto_mismatch;
1424 1414
1425 if (ctx->mountfamily != AF_UNSPEC) { 1415 if (ctx->mountfamily != AF_UNSPEC) {
1426 if (ctx->mount_server.addrlen 1416 if (ctx->mount_server.addrlen) {
1427 if (ctx->mountfamily 1417 if (ctx->mountfamily != ctx->mount_server.address.sa_family)
1428 goto out_moun 1418 goto out_mountproto_mismatch;
1429 } else { 1419 } else {
1430 if (ctx->mountfamily 1420 if (ctx->mountfamily != ctx->nfs_server.address.sa_family)
1431 goto out_moun 1421 goto out_mountproto_mismatch;
1432 } 1422 }
1433 } 1423 }
1434 1424
1435 if (!nfs_verify_server_address(sap)) 1425 if (!nfs_verify_server_address(sap))
1436 goto out_no_address; 1426 goto out_no_address;
1437 1427
1438 ret = nfs_validate_transport_protocol 1428 ret = nfs_validate_transport_protocol(fc, ctx);
1439 if (ret) 1429 if (ret)
1440 return ret; 1430 return ret;
1441 1431
1442 if (ctx->version == 4) { 1432 if (ctx->version == 4) {
1443 if (IS_ENABLED(CONFIG_NFS_V4) 1433 if (IS_ENABLED(CONFIG_NFS_V4)) {
1444 if (ctx->nfs_server.p 1434 if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA)
1445 port = NFS_RD 1435 port = NFS_RDMA_PORT;
1446 else 1436 else
1447 port = NFS_PO 1437 port = NFS_PORT;
1448 max_namelen = NFS4_MA 1438 max_namelen = NFS4_MAXNAMLEN;
1449 max_pathlen = NFS4_MA 1439 max_pathlen = NFS4_MAXPATHLEN;
1450 ctx->flags &= ~(NFS_M 1440 ctx->flags &= ~(NFS_MOUNT_NONLM | NFS_MOUNT_NOACL |
1451 NFS_M 1441 NFS_MOUNT_VER3 | NFS_MOUNT_LOCAL_FLOCK |
1452 NFS_M 1442 NFS_MOUNT_LOCAL_FCNTL);
1453 } else { 1443 } else {
1454 goto out_v4_not_compi 1444 goto out_v4_not_compiled;
1455 } 1445 }
1456 } else { 1446 } else {
1457 nfs_set_mount_transport_proto 1447 nfs_set_mount_transport_protocol(ctx);
1458 if (ctx->nfs_server.protocol 1448 if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA)
1459 port = NFS_RDMA_PORT; 1449 port = NFS_RDMA_PORT;
1460 } 1450 }
1461 1451
1462 nfs_set_port(sap, &ctx->nfs_server.po 1452 nfs_set_port(sap, &ctx->nfs_server.port, port);
1463 1453
1464 ret = nfs_parse_source(fc, max_namele 1454 ret = nfs_parse_source(fc, max_namelen, max_pathlen);
1465 if (ret < 0) 1455 if (ret < 0)
1466 return ret; 1456 return ret;
1467 1457
1468 /* Load the NFS protocol module if we 1458 /* Load the NFS protocol module if we haven't done so yet */
1469 if (!ctx->nfs_mod) { 1459 if (!ctx->nfs_mod) {
1470 nfs_mod = get_nfs_version(ctx 1460 nfs_mod = get_nfs_version(ctx->version);
1471 if (IS_ERR(nfs_mod)) { 1461 if (IS_ERR(nfs_mod)) {
1472 ret = PTR_ERR(nfs_mod 1462 ret = PTR_ERR(nfs_mod);
1473 goto out_version_unav 1463 goto out_version_unavailable;
1474 } 1464 }
1475 ctx->nfs_mod = nfs_mod; 1465 ctx->nfs_mod = nfs_mod;
1476 } 1466 }
1477 1467
1478 /* Ensure the filesystem context has 1468 /* Ensure the filesystem context has the correct fs_type */
1479 if (fc->fs_type != ctx->nfs_mod->nfs_ 1469 if (fc->fs_type != ctx->nfs_mod->nfs_fs) {
1480 module_put(fc->fs_type->owner 1470 module_put(fc->fs_type->owner);
1481 __module_get(ctx->nfs_mod->nf 1471 __module_get(ctx->nfs_mod->nfs_fs->owner);
1482 fc->fs_type = ctx->nfs_mod->n 1472 fc->fs_type = ctx->nfs_mod->nfs_fs;
1483 } 1473 }
1484 return 0; 1474 return 0;
1485 1475
1486 out_no_device_name: 1476 out_no_device_name:
1487 return nfs_invalf(fc, "NFS: Device na 1477 return nfs_invalf(fc, "NFS: Device name not specified");
1488 out_v4_not_compiled: 1478 out_v4_not_compiled:
1489 nfs_errorf(fc, "NFS: NFSv4 is not com 1479 nfs_errorf(fc, "NFS: NFSv4 is not compiled into kernel");
1490 return -EPROTONOSUPPORT; 1480 return -EPROTONOSUPPORT;
1491 out_no_address: 1481 out_no_address:
1492 return nfs_invalf(fc, "NFS: mount pro 1482 return nfs_invalf(fc, "NFS: mount program didn't pass remote address");
1493 out_mountproto_mismatch: 1483 out_mountproto_mismatch:
1494 return nfs_invalf(fc, "NFS: Mount ser 1484 return nfs_invalf(fc, "NFS: Mount server address does not match mountproto= option");
1495 out_proto_mismatch: 1485 out_proto_mismatch:
1496 return nfs_invalf(fc, "NFS: Server ad 1486 return nfs_invalf(fc, "NFS: Server address does not match proto= option");
1497 out_minorversion_mismatch: 1487 out_minorversion_mismatch:
1498 return nfs_invalf(fc, "NFS: Mount opt 1488 return nfs_invalf(fc, "NFS: Mount option vers=%u does not support minorversion=%u",
1499 ctx->version, ctx-> 1489 ctx->version, ctx->minorversion);
1500 out_migration_misuse: 1490 out_migration_misuse:
1501 return nfs_invalf(fc, "NFS: 'Migratio 1491 return nfs_invalf(fc, "NFS: 'Migration' not supported for this NFS version");
1502 out_version_unavailable: 1492 out_version_unavailable:
1503 nfs_errorf(fc, "NFS: Version unavaila 1493 nfs_errorf(fc, "NFS: Version unavailable");
1504 return ret; 1494 return ret;
1505 } 1495 }
1506 1496
1507 /* 1497 /*
1508 * Create an NFS superblock by the appropriat 1498 * Create an NFS superblock by the appropriate method.
1509 */ 1499 */
1510 static int nfs_get_tree(struct fs_context *fc 1500 static int nfs_get_tree(struct fs_context *fc)
1511 { 1501 {
1512 struct nfs_fs_context *ctx = nfs_fc2c 1502 struct nfs_fs_context *ctx = nfs_fc2context(fc);
1513 int err = nfs_fs_context_validate(fc) 1503 int err = nfs_fs_context_validate(fc);
1514 1504
1515 if (err) 1505 if (err)
1516 return err; 1506 return err;
1517 if (!ctx->internal) 1507 if (!ctx->internal)
1518 return ctx->nfs_mod->rpc_ops- 1508 return ctx->nfs_mod->rpc_ops->try_get_tree(fc);
1519 else 1509 else
1520 return nfs_get_tree_common(fc 1510 return nfs_get_tree_common(fc);
1521 } 1511 }
1522 1512
1523 /* 1513 /*
1524 * Handle duplication of a configuration. Th 1514 * Handle duplication of a configuration. The caller copied *src into *sc, but
1525 * it can't deal with resource pointers in th 1515 * it can't deal with resource pointers in the filesystem context, so we have
1526 * to do that. We need to clear pointers, co 1516 * to do that. We need to clear pointers, copy data or get extra refs as
1527 * appropriate. 1517 * appropriate.
1528 */ 1518 */
1529 static int nfs_fs_context_dup(struct fs_conte 1519 static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
1530 { 1520 {
1531 struct nfs_fs_context *src = nfs_fc2c 1521 struct nfs_fs_context *src = nfs_fc2context(src_fc), *ctx;
1532 1522
1533 ctx = kmemdup(src, sizeof(struct nfs_ 1523 ctx = kmemdup(src, sizeof(struct nfs_fs_context), GFP_KERNEL);
1534 if (!ctx) 1524 if (!ctx)
1535 return -ENOMEM; 1525 return -ENOMEM;
1536 1526
1537 ctx->mntfh = nfs_alloc_fhandle(); 1527 ctx->mntfh = nfs_alloc_fhandle();
1538 if (!ctx->mntfh) { 1528 if (!ctx->mntfh) {
1539 kfree(ctx); 1529 kfree(ctx);
1540 return -ENOMEM; 1530 return -ENOMEM;
1541 } 1531 }
1542 nfs_copy_fh(ctx->mntfh, src->mntfh); 1532 nfs_copy_fh(ctx->mntfh, src->mntfh);
1543 1533
1544 __module_get(ctx->nfs_mod->owner); 1534 __module_get(ctx->nfs_mod->owner);
1545 ctx->client_address = NUL 1535 ctx->client_address = NULL;
1546 ctx->mount_server.hostname = NUL 1536 ctx->mount_server.hostname = NULL;
1547 ctx->nfs_server.export_path = NUL 1537 ctx->nfs_server.export_path = NULL;
1548 ctx->nfs_server.hostname = NUL 1538 ctx->nfs_server.hostname = NULL;
1549 ctx->fscache_uniq = NUL 1539 ctx->fscache_uniq = NULL;
1550 ctx->clone_data.fattr = NUL 1540 ctx->clone_data.fattr = NULL;
1551 fc->fs_private = ctx; 1541 fc->fs_private = ctx;
1552 return 0; 1542 return 0;
1553 } 1543 }
1554 1544
1555 static void nfs_fs_context_free(struct fs_con 1545 static void nfs_fs_context_free(struct fs_context *fc)
1556 { 1546 {
1557 struct nfs_fs_context *ctx = nfs_fc2c 1547 struct nfs_fs_context *ctx = nfs_fc2context(fc);
1558 1548
1559 if (ctx) { 1549 if (ctx) {
1560 if (ctx->server) 1550 if (ctx->server)
1561 nfs_free_server(ctx-> 1551 nfs_free_server(ctx->server);
1562 if (ctx->nfs_mod) 1552 if (ctx->nfs_mod)
1563 put_nfs_version(ctx-> 1553 put_nfs_version(ctx->nfs_mod);
1564 kfree(ctx->client_address); 1554 kfree(ctx->client_address);
1565 kfree(ctx->mount_server.hostn 1555 kfree(ctx->mount_server.hostname);
1566 kfree(ctx->nfs_server.export_ 1556 kfree(ctx->nfs_server.export_path);
1567 kfree(ctx->nfs_server.hostnam 1557 kfree(ctx->nfs_server.hostname);
1568 kfree(ctx->fscache_uniq); 1558 kfree(ctx->fscache_uniq);
1569 nfs_free_fhandle(ctx->mntfh); 1559 nfs_free_fhandle(ctx->mntfh);
1570 nfs_free_fattr(ctx->clone_dat 1560 nfs_free_fattr(ctx->clone_data.fattr);
1571 kfree(ctx); 1561 kfree(ctx);
1572 } 1562 }
1573 } 1563 }
1574 1564
1575 static const struct fs_context_operations nfs 1565 static const struct fs_context_operations nfs_fs_context_ops = {
1576 .free = nfs_fs_cont 1566 .free = nfs_fs_context_free,
1577 .dup = nfs_fs_cont 1567 .dup = nfs_fs_context_dup,
1578 .parse_param = nfs_fs_cont 1568 .parse_param = nfs_fs_context_parse_param,
1579 .parse_monolithic = nfs_fs_cont 1569 .parse_monolithic = nfs_fs_context_parse_monolithic,
1580 .get_tree = nfs_get_tre 1570 .get_tree = nfs_get_tree,
1581 .reconfigure = nfs_reconfi 1571 .reconfigure = nfs_reconfigure,
1582 }; 1572 };
1583 1573
1584 /* 1574 /*
1585 * Prepare superblock configuration. We use 1575 * Prepare superblock configuration. We use the namespaces attached to the
1586 * context. This may be the current process' 1576 * context. This may be the current process's namespaces, or it may be a
1587 * container's namespaces. 1577 * container's namespaces.
1588 */ 1578 */
1589 static int nfs_init_fs_context(struct fs_cont 1579 static int nfs_init_fs_context(struct fs_context *fc)
1590 { 1580 {
1591 struct nfs_fs_context *ctx; 1581 struct nfs_fs_context *ctx;
1592 1582
1593 ctx = kzalloc(sizeof(struct nfs_fs_co 1583 ctx = kzalloc(sizeof(struct nfs_fs_context), GFP_KERNEL);
1594 if (unlikely(!ctx)) 1584 if (unlikely(!ctx))
1595 return -ENOMEM; 1585 return -ENOMEM;
1596 1586
1597 ctx->mntfh = nfs_alloc_fhandle(); 1587 ctx->mntfh = nfs_alloc_fhandle();
1598 if (unlikely(!ctx->mntfh)) { 1588 if (unlikely(!ctx->mntfh)) {
1599 kfree(ctx); 1589 kfree(ctx);
1600 return -ENOMEM; 1590 return -ENOMEM;
1601 } 1591 }
1602 1592
1603 ctx->protofamily = AF_UNSPEC; 1593 ctx->protofamily = AF_UNSPEC;
1604 ctx->mountfamily = AF_UNSPEC; 1594 ctx->mountfamily = AF_UNSPEC;
1605 ctx->mount_server.port = NFS_UNSPEC_ 1595 ctx->mount_server.port = NFS_UNSPEC_PORT;
1606 1596
1607 if (fc->root) { 1597 if (fc->root) {
1608 /* reconfigure, start with th 1598 /* reconfigure, start with the current config */
1609 struct nfs_server *nfss = fc- 1599 struct nfs_server *nfss = fc->root->d_sb->s_fs_info;
1610 struct net *net = nfss->nfs_c 1600 struct net *net = nfss->nfs_client->cl_net;
1611 1601
1612 ctx->flags = nfs 1602 ctx->flags = nfss->flags;
1613 ctx->rsize = nfs 1603 ctx->rsize = nfss->rsize;
1614 ctx->wsize = nfs 1604 ctx->wsize = nfss->wsize;
1615 ctx->retrans = nfs 1605 ctx->retrans = nfss->client->cl_timeout->to_retries;
1616 ctx->selected_flavor = nfs 1606 ctx->selected_flavor = nfss->client->cl_auth->au_flavor;
1617 ctx->acregmin = nfs 1607 ctx->acregmin = nfss->acregmin / HZ;
1618 ctx->acregmax = nfs 1608 ctx->acregmax = nfss->acregmax / HZ;
1619 ctx->acdirmin = nfs 1609 ctx->acdirmin = nfss->acdirmin / HZ;
1620 ctx->acdirmax = nfs 1610 ctx->acdirmax = nfss->acdirmax / HZ;
1621 ctx->timeo = 10U 1611 ctx->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ;
1622 ctx->nfs_server.port = nfs 1612 ctx->nfs_server.port = nfss->port;
1623 ctx->nfs_server.addrlen = nfs 1613 ctx->nfs_server.addrlen = nfss->nfs_client->cl_addrlen;
1624 ctx->version = nfs 1614 ctx->version = nfss->nfs_client->rpc_ops->version;
1625 ctx->minorversion = nfs 1615 ctx->minorversion = nfss->nfs_client->cl_minorversion;
1626 1616
1627 memcpy(&ctx->nfs_server._addr 1617 memcpy(&ctx->nfs_server._address, &nfss->nfs_client->cl_addr,
1628 ctx->nfs_server.addrl 1618 ctx->nfs_server.addrlen);
1629 1619
1630 if (fc->net_ns != net) { 1620 if (fc->net_ns != net) {
1631 put_net(fc->net_ns); 1621 put_net(fc->net_ns);
1632 fc->net_ns = get_net( 1622 fc->net_ns = get_net(net);
1633 } 1623 }
1634 1624
1635 ctx->nfs_mod = nfss->nfs_clie 1625 ctx->nfs_mod = nfss->nfs_client->cl_nfs_mod;
1636 __module_get(ctx->nfs_mod->ow 1626 __module_get(ctx->nfs_mod->owner);
1637 } else { 1627 } else {
1638 /* defaults */ 1628 /* defaults */
1639 ctx->timeo = NFS 1629 ctx->timeo = NFS_UNSPEC_TIMEO;
1640 ctx->retrans = NFS 1630 ctx->retrans = NFS_UNSPEC_RETRANS;
1641 ctx->acregmin = NFS 1631 ctx->acregmin = NFS_DEF_ACREGMIN;
1642 ctx->acregmax = NFS 1632 ctx->acregmax = NFS_DEF_ACREGMAX;
1643 ctx->acdirmin = NFS 1633 ctx->acdirmin = NFS_DEF_ACDIRMIN;
1644 ctx->acdirmax = NFS 1634 ctx->acdirmax = NFS_DEF_ACDIRMAX;
1645 ctx->nfs_server.port = NFS 1635 ctx->nfs_server.port = NFS_UNSPEC_PORT;
1646 ctx->nfs_server.protocol = XP 1636 ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP;
1647 ctx->selected_flavor = RPC 1637 ctx->selected_flavor = RPC_AUTH_MAXFLAVOR;
1648 ctx->minorversion = 0; 1638 ctx->minorversion = 0;
1649 ctx->need_mount = tru 1639 ctx->need_mount = true;
1650 ctx->xprtsec.policy = RPC 1640 ctx->xprtsec.policy = RPC_XPRTSEC_NONE;
1651 ctx->xprtsec.cert_serial 1641 ctx->xprtsec.cert_serial = TLS_NO_CERT;
1652 ctx->xprtsec.privkey_serial 1642 ctx->xprtsec.privkey_serial = TLS_NO_PRIVKEY;
1653 1643
1654 fc->s_iflags |= SB 1644 fc->s_iflags |= SB_I_STABLE_WRITES;
1655 } 1645 }
1656 fc->fs_private = ctx; 1646 fc->fs_private = ctx;
1657 fc->ops = &nfs_fs_context_ops; 1647 fc->ops = &nfs_fs_context_ops;
1658 return 0; 1648 return 0;
1659 } 1649 }
1660 1650
1661 struct file_system_type nfs_fs_type = { 1651 struct file_system_type nfs_fs_type = {
1662 .owner = THIS_MODULE 1652 .owner = THIS_MODULE,
1663 .name = "nfs", 1653 .name = "nfs",
1664 .init_fs_context = nfs_init_fs 1654 .init_fs_context = nfs_init_fs_context,
1665 .parameters = nfs_fs_para 1655 .parameters = nfs_fs_parameters,
1666 .kill_sb = nfs_kill_su 1656 .kill_sb = nfs_kill_super,
1667 .fs_flags = FS_RENAME_D 1657 .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
1668 }; 1658 };
1669 MODULE_ALIAS_FS("nfs"); 1659 MODULE_ALIAS_FS("nfs");
1670 EXPORT_SYMBOL_GPL(nfs_fs_type); 1660 EXPORT_SYMBOL_GPL(nfs_fs_type);
1671 1661
1672 #if IS_ENABLED(CONFIG_NFS_V4) 1662 #if IS_ENABLED(CONFIG_NFS_V4)
1673 struct file_system_type nfs4_fs_type = { 1663 struct file_system_type nfs4_fs_type = {
1674 .owner = THIS_MODULE 1664 .owner = THIS_MODULE,
1675 .name = "nfs4", 1665 .name = "nfs4",
1676 .init_fs_context = nfs_init_fs 1666 .init_fs_context = nfs_init_fs_context,
1677 .parameters = nfs_fs_para 1667 .parameters = nfs_fs_parameters,
1678 .kill_sb = nfs_kill_su 1668 .kill_sb = nfs_kill_super,
1679 .fs_flags = FS_RENAME_D 1669 .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
1680 }; 1670 };
1681 MODULE_ALIAS_FS("nfs4"); 1671 MODULE_ALIAS_FS("nfs4");
1682 MODULE_ALIAS("nfs4"); 1672 MODULE_ALIAS("nfs4");
1683 EXPORT_SYMBOL_GPL(nfs4_fs_type); 1673 EXPORT_SYMBOL_GPL(nfs4_fs_type);
1684 #endif /* CONFIG_NFS_V4 */ 1674 #endif /* CONFIG_NFS_V4 */
1685 1675
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