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9954bf92 DH |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
3 | * linux/fs/nfs/fs_context.c | |
4 | * | |
5 | * Copyright (C) 1992 Rick Sladkey | |
f2aedb71 | 6 | * Conversion to new mount api Copyright (C) David Howells |
9954bf92 DH |
7 | * |
8 | * NFS mount handling. | |
9 | * | |
10 | * Split from fs/nfs/super.c by David Howells <dhowells@redhat.com> | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/fs.h> | |
e38bb238 SM |
15 | #include <linux/fs_context.h> |
16 | #include <linux/fs_parser.h> | |
9954bf92 DH |
17 | #include <linux/nfs_fs.h> |
18 | #include <linux/nfs_mount.h> | |
19 | #include <linux/nfs4_mount.h> | |
20 | #include "nfs.h" | |
21 | #include "internal.h" | |
22 | ||
23 | #define NFSDBG_FACILITY NFSDBG_MOUNT | |
24 | ||
25 | #if IS_ENABLED(CONFIG_NFS_V3) | |
26 | #define NFS_DEFAULT_VERSION 3 | |
27 | #else | |
28 | #define NFS_DEFAULT_VERSION 2 | |
29 | #endif | |
30 | ||
31 | #define NFS_MAX_CONNECTIONS 16 | |
32 | ||
e38bb238 SM |
33 | enum nfs_param { |
34 | Opt_ac, | |
35 | Opt_acdirmax, | |
36 | Opt_acdirmin, | |
37 | Opt_acl, | |
38 | Opt_acregmax, | |
39 | Opt_acregmin, | |
9954bf92 | 40 | Opt_actimeo, |
e38bb238 SM |
41 | Opt_addr, |
42 | Opt_bg, | |
43 | Opt_bsize, | |
44 | Opt_clientaddr, | |
45 | Opt_cto, | |
46 | Opt_fg, | |
47 | Opt_fscache, | |
48ce73b1 | 48 | Opt_fscache_flag, |
e38bb238 SM |
49 | Opt_hard, |
50 | Opt_intr, | |
51 | Opt_local_lock, | |
52 | Opt_lock, | |
53 | Opt_lookupcache, | |
54 | Opt_migration, | |
55 | Opt_minorversion, | |
56 | Opt_mountaddr, | |
57 | Opt_mounthost, | |
9954bf92 | 58 | Opt_mountport, |
e38bb238 | 59 | Opt_mountproto, |
9954bf92 | 60 | Opt_mountvers, |
e38bb238 | 61 | Opt_namelen, |
9954bf92 | 62 | Opt_nconnect, |
e38bb238 SM |
63 | Opt_port, |
64 | Opt_posix, | |
65 | Opt_proto, | |
66 | Opt_rdirplus, | |
67 | Opt_rdma, | |
68 | Opt_resvport, | |
69 | Opt_retrans, | |
70 | Opt_retry, | |
71 | Opt_rsize, | |
72 | Opt_sec, | |
73 | Opt_sharecache, | |
74 | Opt_sloppy, | |
75 | Opt_soft, | |
76 | Opt_softerr, | |
c74dfe97 | 77 | Opt_softreval, |
e38bb238 SM |
78 | Opt_source, |
79 | Opt_tcp, | |
80 | Opt_timeo, | |
81 | Opt_udp, | |
82 | Opt_v, | |
83 | Opt_vers, | |
84 | Opt_wsize, | |
a0492339 | 85 | Opt_write, |
9954bf92 DH |
86 | }; |
87 | ||
2710c957 AV |
88 | enum { |
89 | Opt_local_lock_all, | |
90 | Opt_local_lock_flock, | |
91 | Opt_local_lock_none, | |
92 | Opt_local_lock_posix, | |
93 | }; | |
94 | ||
5eede625 | 95 | static const struct constant_table nfs_param_enums_local_lock[] = { |
2710c957 AV |
96 | { "all", Opt_local_lock_all }, |
97 | { "flock", Opt_local_lock_flock }, | |
a2d24bcb | 98 | { "posix", Opt_local_lock_posix }, |
2710c957 AV |
99 | { "none", Opt_local_lock_none }, |
100 | {} | |
101 | }; | |
102 | ||
103 | enum { | |
104 | Opt_lookupcache_all, | |
105 | Opt_lookupcache_none, | |
106 | Opt_lookupcache_positive, | |
107 | }; | |
108 | ||
5eede625 | 109 | static const struct constant_table nfs_param_enums_lookupcache[] = { |
2710c957 AV |
110 | { "all", Opt_lookupcache_all }, |
111 | { "none", Opt_lookupcache_none }, | |
112 | { "pos", Opt_lookupcache_positive }, | |
113 | { "positive", Opt_lookupcache_positive }, | |
114 | {} | |
115 | }; | |
116 | ||
a0492339 TM |
117 | enum { |
118 | Opt_write_lazy, | |
119 | Opt_write_eager, | |
120 | Opt_write_wait, | |
121 | }; | |
122 | ||
123 | static const struct constant_table nfs_param_enums_write[] = { | |
124 | { "lazy", Opt_write_lazy }, | |
125 | { "eager", Opt_write_eager }, | |
126 | { "wait", Opt_write_wait }, | |
127 | {} | |
128 | }; | |
129 | ||
d7167b14 | 130 | static const struct fs_parameter_spec nfs_fs_parameters[] = { |
e38bb238 SM |
131 | fsparam_flag_no("ac", Opt_ac), |
132 | fsparam_u32 ("acdirmax", Opt_acdirmax), | |
133 | fsparam_u32 ("acdirmin", Opt_acdirmin), | |
134 | fsparam_flag_no("acl", Opt_acl), | |
135 | fsparam_u32 ("acregmax", Opt_acregmax), | |
136 | fsparam_u32 ("acregmin", Opt_acregmin), | |
137 | fsparam_u32 ("actimeo", Opt_actimeo), | |
138 | fsparam_string("addr", Opt_addr), | |
139 | fsparam_flag ("bg", Opt_bg), | |
140 | fsparam_u32 ("bsize", Opt_bsize), | |
141 | fsparam_string("clientaddr", Opt_clientaddr), | |
142 | fsparam_flag_no("cto", Opt_cto), | |
143 | fsparam_flag ("fg", Opt_fg), | |
48ce73b1 AV |
144 | fsparam_flag_no("fsc", Opt_fscache_flag), |
145 | fsparam_string("fsc", Opt_fscache), | |
e38bb238 | 146 | fsparam_flag ("hard", Opt_hard), |
328de528 | 147 | __fsparam(NULL, "intr", Opt_intr, |
2710c957 AV |
148 | fs_param_neg_with_no|fs_param_deprecated, NULL), |
149 | fsparam_enum ("local_lock", Opt_local_lock, nfs_param_enums_local_lock), | |
e38bb238 | 150 | fsparam_flag_no("lock", Opt_lock), |
2710c957 | 151 | fsparam_enum ("lookupcache", Opt_lookupcache, nfs_param_enums_lookupcache), |
e38bb238 SM |
152 | fsparam_flag_no("migration", Opt_migration), |
153 | fsparam_u32 ("minorversion", Opt_minorversion), | |
154 | fsparam_string("mountaddr", Opt_mountaddr), | |
155 | fsparam_string("mounthost", Opt_mounthost), | |
156 | fsparam_u32 ("mountport", Opt_mountport), | |
157 | fsparam_string("mountproto", Opt_mountproto), | |
158 | fsparam_u32 ("mountvers", Opt_mountvers), | |
159 | fsparam_u32 ("namlen", Opt_namelen), | |
160 | fsparam_u32 ("nconnect", Opt_nconnect), | |
161 | fsparam_string("nfsvers", Opt_vers), | |
162 | fsparam_u32 ("port", Opt_port), | |
163 | fsparam_flag_no("posix", Opt_posix), | |
164 | fsparam_string("proto", Opt_proto), | |
165 | fsparam_flag_no("rdirplus", Opt_rdirplus), | |
166 | fsparam_flag ("rdma", Opt_rdma), | |
167 | fsparam_flag_no("resvport", Opt_resvport), | |
168 | fsparam_u32 ("retrans", Opt_retrans), | |
169 | fsparam_string("retry", Opt_retry), | |
170 | fsparam_u32 ("rsize", Opt_rsize), | |
171 | fsparam_string("sec", Opt_sec), | |
172 | fsparam_flag_no("sharecache", Opt_sharecache), | |
173 | fsparam_flag ("sloppy", Opt_sloppy), | |
174 | fsparam_flag ("soft", Opt_soft), | |
175 | fsparam_flag ("softerr", Opt_softerr), | |
c74dfe97 | 176 | fsparam_flag ("softreval", Opt_softreval), |
e38bb238 SM |
177 | fsparam_string("source", Opt_source), |
178 | fsparam_flag ("tcp", Opt_tcp), | |
179 | fsparam_u32 ("timeo", Opt_timeo), | |
180 | fsparam_flag ("udp", Opt_udp), | |
181 | fsparam_flag ("v2", Opt_v), | |
182 | fsparam_flag ("v3", Opt_v), | |
183 | fsparam_flag ("v4", Opt_v), | |
184 | fsparam_flag ("v4.0", Opt_v), | |
185 | fsparam_flag ("v4.1", Opt_v), | |
186 | fsparam_flag ("v4.2", Opt_v), | |
187 | fsparam_string("vers", Opt_vers), | |
a0492339 | 188 | fsparam_enum ("write", Opt_write, nfs_param_enums_write), |
e38bb238 SM |
189 | fsparam_u32 ("wsize", Opt_wsize), |
190 | {} | |
9954bf92 DH |
191 | }; |
192 | ||
9954bf92 | 193 | enum { |
e38bb238 SM |
194 | Opt_vers_2, |
195 | Opt_vers_3, | |
196 | Opt_vers_4, | |
197 | Opt_vers_4_0, | |
198 | Opt_vers_4_1, | |
199 | Opt_vers_4_2, | |
9954bf92 DH |
200 | }; |
201 | ||
e38bb238 SM |
202 | static const struct constant_table nfs_vers_tokens[] = { |
203 | { "2", Opt_vers_2 }, | |
204 | { "3", Opt_vers_3 }, | |
205 | { "4", Opt_vers_4 }, | |
206 | { "4.0", Opt_vers_4_0 }, | |
207 | { "4.1", Opt_vers_4_1 }, | |
208 | { "4.2", Opt_vers_4_2 }, | |
529af905 | 209 | {} |
9954bf92 DH |
210 | }; |
211 | ||
212 | enum { | |
e38bb238 SM |
213 | Opt_xprt_rdma, |
214 | Opt_xprt_rdma6, | |
215 | Opt_xprt_tcp, | |
216 | Opt_xprt_tcp6, | |
217 | Opt_xprt_udp, | |
218 | Opt_xprt_udp6, | |
219 | nr__Opt_xprt | |
9954bf92 DH |
220 | }; |
221 | ||
529af905 | 222 | static const struct constant_table nfs_xprt_protocol_tokens[] = { |
e38bb238 SM |
223 | { "rdma", Opt_xprt_rdma }, |
224 | { "rdma6", Opt_xprt_rdma6 }, | |
225 | { "tcp", Opt_xprt_tcp }, | |
226 | { "tcp6", Opt_xprt_tcp6 }, | |
227 | { "udp", Opt_xprt_udp }, | |
228 | { "udp6", Opt_xprt_udp6 }, | |
529af905 | 229 | {} |
9954bf92 DH |
230 | }; |
231 | ||
232 | enum { | |
e38bb238 SM |
233 | Opt_sec_krb5, |
234 | Opt_sec_krb5i, | |
235 | Opt_sec_krb5p, | |
236 | Opt_sec_lkey, | |
237 | Opt_sec_lkeyi, | |
238 | Opt_sec_lkeyp, | |
239 | Opt_sec_none, | |
240 | Opt_sec_spkm, | |
241 | Opt_sec_spkmi, | |
242 | Opt_sec_spkmp, | |
243 | Opt_sec_sys, | |
244 | nr__Opt_sec | |
9954bf92 DH |
245 | }; |
246 | ||
e38bb238 SM |
247 | static const struct constant_table nfs_secflavor_tokens[] = { |
248 | { "krb5", Opt_sec_krb5 }, | |
249 | { "krb5i", Opt_sec_krb5i }, | |
250 | { "krb5p", Opt_sec_krb5p }, | |
251 | { "lkey", Opt_sec_lkey }, | |
252 | { "lkeyi", Opt_sec_lkeyi }, | |
253 | { "lkeyp", Opt_sec_lkeyp }, | |
254 | { "none", Opt_sec_none }, | |
255 | { "null", Opt_sec_none }, | |
256 | { "spkm3", Opt_sec_spkm }, | |
257 | { "spkm3i", Opt_sec_spkmi }, | |
258 | { "spkm3p", Opt_sec_spkmp }, | |
259 | { "sys", Opt_sec_sys }, | |
529af905 | 260 | {} |
9954bf92 DH |
261 | }; |
262 | ||
9954bf92 DH |
263 | /* |
264 | * Sanity-check a server address provided by the mount command. | |
265 | * | |
266 | * Address family must be initialized, and address must not be | |
267 | * the ANY address for that family. | |
268 | */ | |
269 | static int nfs_verify_server_address(struct sockaddr *addr) | |
270 | { | |
271 | switch (addr->sa_family) { | |
272 | case AF_INET: { | |
273 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; | |
274 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); | |
275 | } | |
276 | case AF_INET6: { | |
277 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
278 | return !ipv6_addr_any(sa); | |
279 | } | |
280 | } | |
281 | ||
282 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); | |
283 | return 0; | |
284 | } | |
285 | ||
286 | /* | |
287 | * Sanity check the NFS transport protocol. | |
288 | * | |
289 | */ | |
5eb005ca | 290 | static void nfs_validate_transport_protocol(struct nfs_fs_context *ctx) |
9954bf92 | 291 | { |
5eb005ca | 292 | switch (ctx->nfs_server.protocol) { |
9954bf92 DH |
293 | case XPRT_TRANSPORT_UDP: |
294 | case XPRT_TRANSPORT_TCP: | |
295 | case XPRT_TRANSPORT_RDMA: | |
296 | break; | |
297 | default: | |
5eb005ca | 298 | ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
9954bf92 DH |
299 | } |
300 | } | |
301 | ||
302 | /* | |
303 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
304 | * settings should depend upon the specified NFS transport. | |
305 | */ | |
5eb005ca | 306 | static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx) |
9954bf92 | 307 | { |
5eb005ca | 308 | nfs_validate_transport_protocol(ctx); |
9954bf92 | 309 | |
5eb005ca DH |
310 | if (ctx->mount_server.protocol == XPRT_TRANSPORT_UDP || |
311 | ctx->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
9954bf92 | 312 | return; |
5eb005ca | 313 | switch (ctx->nfs_server.protocol) { |
9954bf92 | 314 | case XPRT_TRANSPORT_UDP: |
5eb005ca | 315 | ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; |
9954bf92 DH |
316 | break; |
317 | case XPRT_TRANSPORT_TCP: | |
318 | case XPRT_TRANSPORT_RDMA: | |
5eb005ca | 319 | ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; |
9954bf92 DH |
320 | } |
321 | } | |
322 | ||
323 | /* | |
324 | * Add 'flavor' to 'auth_info' if not already present. | |
325 | * Returns true if 'flavor' ends up in the list, false otherwise | |
326 | */ | |
62a55d08 | 327 | static int nfs_auth_info_add(struct fs_context *fc, |
e558100f DH |
328 | struct nfs_auth_info *auth_info, |
329 | rpc_authflavor_t flavor) | |
9954bf92 DH |
330 | { |
331 | unsigned int i; | |
332 | unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); | |
333 | ||
334 | /* make sure this flavor isn't already in the list */ | |
335 | for (i = 0; i < auth_info->flavor_len; i++) { | |
336 | if (flavor == auth_info->flavors[i]) | |
e558100f | 337 | return 0; |
9954bf92 DH |
338 | } |
339 | ||
ce8866f0 SM |
340 | if (auth_info->flavor_len + 1 >= max_flavor_len) |
341 | return nfs_invalf(fc, "NFS: too many sec= flavors"); | |
9954bf92 DH |
342 | |
343 | auth_info->flavors[auth_info->flavor_len++] = flavor; | |
e558100f | 344 | return 0; |
9954bf92 DH |
345 | } |
346 | ||
347 | /* | |
348 | * Parse the value of the 'sec=' option. | |
349 | */ | |
62a55d08 | 350 | static int nfs_parse_security_flavors(struct fs_context *fc, |
e38bb238 | 351 | struct fs_parameter *param) |
9954bf92 | 352 | { |
62a55d08 | 353 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
9954bf92 | 354 | rpc_authflavor_t pseudoflavor; |
e38bb238 | 355 | char *string = param->string, *p; |
e558100f | 356 | int ret; |
9954bf92 | 357 | |
e38bb238 | 358 | dfprintk(MOUNT, "NFS: parsing %s=%s option\n", param->key, param->string); |
9954bf92 | 359 | |
e38bb238 SM |
360 | while ((p = strsep(&string, ":")) != NULL) { |
361 | if (!*p) | |
362 | continue; | |
363 | switch (lookup_constant(nfs_secflavor_tokens, p, -1)) { | |
9954bf92 DH |
364 | case Opt_sec_none: |
365 | pseudoflavor = RPC_AUTH_NULL; | |
366 | break; | |
367 | case Opt_sec_sys: | |
368 | pseudoflavor = RPC_AUTH_UNIX; | |
369 | break; | |
370 | case Opt_sec_krb5: | |
371 | pseudoflavor = RPC_AUTH_GSS_KRB5; | |
372 | break; | |
373 | case Opt_sec_krb5i: | |
374 | pseudoflavor = RPC_AUTH_GSS_KRB5I; | |
375 | break; | |
376 | case Opt_sec_krb5p: | |
377 | pseudoflavor = RPC_AUTH_GSS_KRB5P; | |
378 | break; | |
379 | case Opt_sec_lkey: | |
380 | pseudoflavor = RPC_AUTH_GSS_LKEY; | |
381 | break; | |
382 | case Opt_sec_lkeyi: | |
383 | pseudoflavor = RPC_AUTH_GSS_LKEYI; | |
384 | break; | |
385 | case Opt_sec_lkeyp: | |
386 | pseudoflavor = RPC_AUTH_GSS_LKEYP; | |
387 | break; | |
388 | case Opt_sec_spkm: | |
389 | pseudoflavor = RPC_AUTH_GSS_SPKM; | |
390 | break; | |
391 | case Opt_sec_spkmi: | |
392 | pseudoflavor = RPC_AUTH_GSS_SPKMI; | |
393 | break; | |
394 | case Opt_sec_spkmp: | |
395 | pseudoflavor = RPC_AUTH_GSS_SPKMP; | |
396 | break; | |
397 | default: | |
ce8866f0 | 398 | return nfs_invalf(fc, "NFS: sec=%s option not recognized", p); |
9954bf92 DH |
399 | } |
400 | ||
62a55d08 | 401 | ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor); |
e558100f DH |
402 | if (ret < 0) |
403 | return ret; | |
9954bf92 DH |
404 | } |
405 | ||
e558100f | 406 | return 0; |
9954bf92 DH |
407 | } |
408 | ||
62a55d08 | 409 | static int nfs_parse_version_string(struct fs_context *fc, |
e38bb238 | 410 | const char *string) |
9954bf92 | 411 | { |
62a55d08 SM |
412 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
413 | ||
5eb005ca | 414 | ctx->flags &= ~NFS_MOUNT_VER3; |
e38bb238 | 415 | switch (lookup_constant(nfs_vers_tokens, string, -1)) { |
9954bf92 | 416 | case Opt_vers_2: |
5eb005ca | 417 | ctx->version = 2; |
9954bf92 DH |
418 | break; |
419 | case Opt_vers_3: | |
5eb005ca DH |
420 | ctx->flags |= NFS_MOUNT_VER3; |
421 | ctx->version = 3; | |
9954bf92 DH |
422 | break; |
423 | case Opt_vers_4: | |
424 | /* Backward compatibility option. In future, | |
425 | * the mount program should always supply | |
426 | * a NFSv4 minor version number. | |
427 | */ | |
5eb005ca | 428 | ctx->version = 4; |
9954bf92 DH |
429 | break; |
430 | case Opt_vers_4_0: | |
5eb005ca DH |
431 | ctx->version = 4; |
432 | ctx->minorversion = 0; | |
9954bf92 DH |
433 | break; |
434 | case Opt_vers_4_1: | |
5eb005ca DH |
435 | ctx->version = 4; |
436 | ctx->minorversion = 1; | |
9954bf92 DH |
437 | break; |
438 | case Opt_vers_4_2: | |
5eb005ca DH |
439 | ctx->version = 4; |
440 | ctx->minorversion = 2; | |
9954bf92 DH |
441 | break; |
442 | default: | |
ce8866f0 | 443 | return nfs_invalf(fc, "NFS: Unsupported NFS version"); |
9954bf92 | 444 | } |
e558100f | 445 | return 0; |
9954bf92 DH |
446 | } |
447 | ||
9954bf92 | 448 | /* |
e38bb238 | 449 | * Parse a single mount parameter. |
9954bf92 | 450 | */ |
f2aedb71 | 451 | static int nfs_fs_context_parse_param(struct fs_context *fc, |
e38bb238 | 452 | struct fs_parameter *param) |
9954bf92 | 453 | { |
e38bb238 | 454 | struct fs_parse_result result; |
f2aedb71 | 455 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
e38bb238 SM |
456 | unsigned short protofamily, mountfamily; |
457 | unsigned int len; | |
458 | int ret, opt; | |
9954bf92 | 459 | |
e38bb238 | 460 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", param->key); |
9954bf92 | 461 | |
d7167b14 | 462 | opt = fs_parse(fc, nfs_fs_parameters, param, &result); |
e38bb238 SM |
463 | if (opt < 0) |
464 | return ctx->sloppy ? 1 : opt; | |
465 | ||
466 | switch (opt) { | |
f2aedb71 | 467 | case Opt_source: |
ce8866f0 SM |
468 | if (fc->source) |
469 | return nfs_invalf(fc, "NFS: Multiple sources not supported"); | |
f2aedb71 DH |
470 | fc->source = param->string; |
471 | param->string = NULL; | |
472 | break; | |
473 | ||
9954bf92 DH |
474 | /* |
475 | * boolean options: foo/nofoo | |
476 | */ | |
cbd071b5 DH |
477 | case Opt_soft: |
478 | ctx->flags |= NFS_MOUNT_SOFT; | |
479 | ctx->flags &= ~NFS_MOUNT_SOFTERR; | |
480 | break; | |
481 | case Opt_softerr: | |
c74dfe97 | 482 | ctx->flags |= NFS_MOUNT_SOFTERR | NFS_MOUNT_SOFTREVAL; |
cbd071b5 DH |
483 | ctx->flags &= ~NFS_MOUNT_SOFT; |
484 | break; | |
485 | case Opt_hard: | |
c74dfe97 TM |
486 | ctx->flags &= ~(NFS_MOUNT_SOFT | |
487 | NFS_MOUNT_SOFTERR | | |
488 | NFS_MOUNT_SOFTREVAL); | |
489 | break; | |
490 | case Opt_softreval: | |
491 | if (result.negated) | |
492 | ctx->flags &= ~NFS_MOUNT_SOFTREVAL; | |
493 | else | |
494 | ctx->flags &= NFS_MOUNT_SOFTREVAL; | |
cbd071b5 DH |
495 | break; |
496 | case Opt_posix: | |
e38bb238 SM |
497 | if (result.negated) |
498 | ctx->flags &= ~NFS_MOUNT_POSIX; | |
499 | else | |
500 | ctx->flags |= NFS_MOUNT_POSIX; | |
cbd071b5 DH |
501 | break; |
502 | case Opt_cto: | |
e38bb238 SM |
503 | if (result.negated) |
504 | ctx->flags |= NFS_MOUNT_NOCTO; | |
505 | else | |
506 | ctx->flags &= ~NFS_MOUNT_NOCTO; | |
cbd071b5 DH |
507 | break; |
508 | case Opt_ac: | |
e38bb238 SM |
509 | if (result.negated) |
510 | ctx->flags |= NFS_MOUNT_NOAC; | |
511 | else | |
512 | ctx->flags &= ~NFS_MOUNT_NOAC; | |
cbd071b5 DH |
513 | break; |
514 | case Opt_lock: | |
e38bb238 SM |
515 | if (result.negated) { |
516 | ctx->flags |= NFS_MOUNT_NONLM; | |
517 | ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); | |
518 | } else { | |
519 | ctx->flags &= ~NFS_MOUNT_NONLM; | |
520 | ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); | |
521 | } | |
cbd071b5 DH |
522 | break; |
523 | case Opt_udp: | |
524 | ctx->flags &= ~NFS_MOUNT_TCP; | |
525 | ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; | |
526 | break; | |
527 | case Opt_tcp: | |
cbd071b5 DH |
528 | case Opt_rdma: |
529 | ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1c3695d0 TM |
530 | ret = xprt_find_transport_ident(param->key); |
531 | if (ret < 0) | |
532 | goto out_bad_transport; | |
533 | ctx->nfs_server.protocol = ret; | |
cbd071b5 DH |
534 | break; |
535 | case Opt_acl: | |
e38bb238 SM |
536 | if (result.negated) |
537 | ctx->flags |= NFS_MOUNT_NOACL; | |
538 | else | |
539 | ctx->flags &= ~NFS_MOUNT_NOACL; | |
cbd071b5 DH |
540 | break; |
541 | case Opt_rdirplus: | |
e38bb238 SM |
542 | if (result.negated) |
543 | ctx->flags |= NFS_MOUNT_NORDIRPLUS; | |
544 | else | |
545 | ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
cbd071b5 DH |
546 | break; |
547 | case Opt_sharecache: | |
e38bb238 SM |
548 | if (result.negated) |
549 | ctx->flags |= NFS_MOUNT_UNSHARED; | |
550 | else | |
551 | ctx->flags &= ~NFS_MOUNT_UNSHARED; | |
cbd071b5 DH |
552 | break; |
553 | case Opt_resvport: | |
e38bb238 SM |
554 | if (result.negated) |
555 | ctx->flags |= NFS_MOUNT_NORESVPORT; | |
556 | else | |
557 | ctx->flags &= ~NFS_MOUNT_NORESVPORT; | |
cbd071b5 | 558 | break; |
48ce73b1 | 559 | case Opt_fscache_flag: |
e38bb238 SM |
560 | if (result.negated) |
561 | ctx->options &= ~NFS_OPTION_FSCACHE; | |
562 | else | |
563 | ctx->options |= NFS_OPTION_FSCACHE; | |
48ce73b1 AV |
564 | kfree(ctx->fscache_uniq); |
565 | ctx->fscache_uniq = NULL; | |
566 | break; | |
567 | case Opt_fscache: | |
568 | ctx->options |= NFS_OPTION_FSCACHE; | |
569 | kfree(ctx->fscache_uniq); | |
570 | ctx->fscache_uniq = param->string; | |
571 | param->string = NULL; | |
cbd071b5 DH |
572 | break; |
573 | case Opt_migration: | |
e38bb238 SM |
574 | if (result.negated) |
575 | ctx->options &= ~NFS_OPTION_MIGRATION; | |
576 | else | |
577 | ctx->options |= NFS_OPTION_MIGRATION; | |
cbd071b5 | 578 | break; |
9954bf92 DH |
579 | |
580 | /* | |
581 | * options that take numeric values | |
582 | */ | |
cbd071b5 | 583 | case Opt_port: |
e38bb238 SM |
584 | if (result.uint_32 > USHRT_MAX) |
585 | goto out_of_bounds; | |
586 | ctx->nfs_server.port = result.uint_32; | |
cbd071b5 DH |
587 | break; |
588 | case Opt_rsize: | |
e38bb238 | 589 | ctx->rsize = result.uint_32; |
cbd071b5 DH |
590 | break; |
591 | case Opt_wsize: | |
e38bb238 | 592 | ctx->wsize = result.uint_32; |
cbd071b5 DH |
593 | break; |
594 | case Opt_bsize: | |
e38bb238 | 595 | ctx->bsize = result.uint_32; |
cbd071b5 DH |
596 | break; |
597 | case Opt_timeo: | |
e38bb238 SM |
598 | if (result.uint_32 < 1 || result.uint_32 > INT_MAX) |
599 | goto out_of_bounds; | |
600 | ctx->timeo = result.uint_32; | |
cbd071b5 DH |
601 | break; |
602 | case Opt_retrans: | |
e38bb238 SM |
603 | if (result.uint_32 > INT_MAX) |
604 | goto out_of_bounds; | |
605 | ctx->retrans = result.uint_32; | |
cbd071b5 DH |
606 | break; |
607 | case Opt_acregmin: | |
e38bb238 | 608 | ctx->acregmin = result.uint_32; |
cbd071b5 DH |
609 | break; |
610 | case Opt_acregmax: | |
e38bb238 | 611 | ctx->acregmax = result.uint_32; |
cbd071b5 DH |
612 | break; |
613 | case Opt_acdirmin: | |
e38bb238 | 614 | ctx->acdirmin = result.uint_32; |
cbd071b5 DH |
615 | break; |
616 | case Opt_acdirmax: | |
e38bb238 | 617 | ctx->acdirmax = result.uint_32; |
cbd071b5 DH |
618 | break; |
619 | case Opt_actimeo: | |
e38bb238 SM |
620 | ctx->acregmin = result.uint_32; |
621 | ctx->acregmax = result.uint_32; | |
622 | ctx->acdirmin = result.uint_32; | |
623 | ctx->acdirmax = result.uint_32; | |
cbd071b5 DH |
624 | break; |
625 | case Opt_namelen: | |
e38bb238 | 626 | ctx->namlen = result.uint_32; |
cbd071b5 DH |
627 | break; |
628 | case Opt_mountport: | |
e38bb238 SM |
629 | if (result.uint_32 > USHRT_MAX) |
630 | goto out_of_bounds; | |
631 | ctx->mount_server.port = result.uint_32; | |
cbd071b5 DH |
632 | break; |
633 | case Opt_mountvers: | |
e38bb238 SM |
634 | if (result.uint_32 < NFS_MNT_VERSION || |
635 | result.uint_32 > NFS_MNT3_VERSION) | |
636 | goto out_of_bounds; | |
637 | ctx->mount_server.version = result.uint_32; | |
cbd071b5 DH |
638 | break; |
639 | case Opt_minorversion: | |
e38bb238 SM |
640 | if (result.uint_32 > NFS4_MAX_MINOR_VERSION) |
641 | goto out_of_bounds; | |
642 | ctx->minorversion = result.uint_32; | |
cbd071b5 | 643 | break; |
9954bf92 DH |
644 | |
645 | /* | |
646 | * options that take text values | |
647 | */ | |
e38bb238 | 648 | case Opt_v: |
62a55d08 | 649 | ret = nfs_parse_version_string(fc, param->key + 1); |
e38bb238 SM |
650 | if (ret < 0) |
651 | return ret; | |
652 | break; | |
653 | case Opt_vers: | |
62a55d08 | 654 | ret = nfs_parse_version_string(fc, param->string); |
e558100f DH |
655 | if (ret < 0) |
656 | return ret; | |
cbd071b5 DH |
657 | break; |
658 | case Opt_sec: | |
62a55d08 | 659 | ret = nfs_parse_security_flavors(fc, param); |
e558100f DH |
660 | if (ret < 0) |
661 | return ret; | |
cbd071b5 | 662 | break; |
cbd071b5 | 663 | |
e38bb238 SM |
664 | case Opt_proto: |
665 | protofamily = AF_INET; | |
666 | switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) { | |
cbd071b5 | 667 | case Opt_xprt_udp6: |
e38bb238 | 668 | protofamily = AF_INET6; |
df561f66 | 669 | fallthrough; |
cbd071b5 DH |
670 | case Opt_xprt_udp: |
671 | ctx->flags &= ~NFS_MOUNT_TCP; | |
672 | ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; | |
9954bf92 | 673 | break; |
cbd071b5 | 674 | case Opt_xprt_tcp6: |
e38bb238 | 675 | protofamily = AF_INET6; |
df561f66 | 676 | fallthrough; |
cbd071b5 DH |
677 | case Opt_xprt_tcp: |
678 | ctx->flags |= NFS_MOUNT_TCP; | |
679 | ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
9954bf92 | 680 | break; |
cbd071b5 | 681 | case Opt_xprt_rdma6: |
e38bb238 | 682 | protofamily = AF_INET6; |
df561f66 | 683 | fallthrough; |
cbd071b5 DH |
684 | case Opt_xprt_rdma: |
685 | /* vector side protocols to TCP */ | |
686 | ctx->flags |= NFS_MOUNT_TCP; | |
1c3695d0 TM |
687 | ret = xprt_find_transport_ident(param->string); |
688 | if (ret < 0) | |
689 | goto out_bad_transport; | |
690 | ctx->nfs_server.protocol = ret; | |
9954bf92 | 691 | break; |
cbd071b5 | 692 | default: |
1c3695d0 | 693 | goto out_bad_transport; |
cbd071b5 | 694 | } |
e38bb238 SM |
695 | |
696 | ctx->protofamily = protofamily; | |
cbd071b5 | 697 | break; |
e38bb238 | 698 | |
cbd071b5 | 699 | case Opt_mountproto: |
e38bb238 SM |
700 | mountfamily = AF_INET; |
701 | switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) { | |
cbd071b5 | 702 | case Opt_xprt_udp6: |
e38bb238 | 703 | mountfamily = AF_INET6; |
df561f66 | 704 | fallthrough; |
cbd071b5 DH |
705 | case Opt_xprt_udp: |
706 | ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
707 | break; | |
708 | case Opt_xprt_tcp6: | |
e38bb238 | 709 | mountfamily = AF_INET6; |
df561f66 | 710 | fallthrough; |
cbd071b5 DH |
711 | case Opt_xprt_tcp: |
712 | ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
713 | break; | |
714 | case Opt_xprt_rdma: /* not used for side protocols */ | |
715 | default: | |
1c3695d0 | 716 | goto out_bad_transport; |
cbd071b5 | 717 | } |
e38bb238 | 718 | ctx->mountfamily = mountfamily; |
cbd071b5 | 719 | break; |
e38bb238 | 720 | |
cbd071b5 | 721 | case Opt_addr: |
62a55d08 | 722 | len = rpc_pton(fc->net_ns, param->string, param->size, |
e38bb238 SM |
723 | &ctx->nfs_server.address, |
724 | sizeof(ctx->nfs_server._address)); | |
725 | if (len == 0) | |
cbd071b5 | 726 | goto out_invalid_address; |
e38bb238 | 727 | ctx->nfs_server.addrlen = len; |
cbd071b5 DH |
728 | break; |
729 | case Opt_clientaddr: | |
e38bb238 SM |
730 | kfree(ctx->client_address); |
731 | ctx->client_address = param->string; | |
732 | param->string = NULL; | |
cbd071b5 DH |
733 | break; |
734 | case Opt_mounthost: | |
e38bb238 SM |
735 | kfree(ctx->mount_server.hostname); |
736 | ctx->mount_server.hostname = param->string; | |
737 | param->string = NULL; | |
cbd071b5 DH |
738 | break; |
739 | case Opt_mountaddr: | |
62a55d08 | 740 | len = rpc_pton(fc->net_ns, param->string, param->size, |
e38bb238 SM |
741 | &ctx->mount_server.address, |
742 | sizeof(ctx->mount_server._address)); | |
743 | if (len == 0) | |
cbd071b5 | 744 | goto out_invalid_address; |
e38bb238 | 745 | ctx->mount_server.addrlen = len; |
cbd071b5 DH |
746 | break; |
747 | case Opt_nconnect: | |
e38bb238 SM |
748 | if (result.uint_32 < 1 || result.uint_32 > NFS_MAX_CONNECTIONS) |
749 | goto out_of_bounds; | |
750 | ctx->nfs_server.nconnect = result.uint_32; | |
cbd071b5 DH |
751 | break; |
752 | case Opt_lookupcache: | |
e38bb238 | 753 | switch (result.uint_32) { |
cbd071b5 DH |
754 | case Opt_lookupcache_all: |
755 | ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
9954bf92 | 756 | break; |
cbd071b5 DH |
757 | case Opt_lookupcache_positive: |
758 | ctx->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
759 | ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
9954bf92 | 760 | break; |
cbd071b5 DH |
761 | case Opt_lookupcache_none: |
762 | ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
9954bf92 | 763 | break; |
cbd071b5 | 764 | default: |
e38bb238 | 765 | goto out_invalid_value; |
cbd071b5 DH |
766 | } |
767 | break; | |
cbd071b5 | 768 | case Opt_local_lock: |
e38bb238 | 769 | switch (result.uint_32) { |
cbd071b5 DH |
770 | case Opt_local_lock_all: |
771 | ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | | |
772 | NFS_MOUNT_LOCAL_FCNTL); | |
9954bf92 | 773 | break; |
cbd071b5 DH |
774 | case Opt_local_lock_flock: |
775 | ctx->flags |= NFS_MOUNT_LOCAL_FLOCK; | |
9954bf92 | 776 | break; |
cbd071b5 DH |
777 | case Opt_local_lock_posix: |
778 | ctx->flags |= NFS_MOUNT_LOCAL_FCNTL; | |
9954bf92 | 779 | break; |
cbd071b5 DH |
780 | case Opt_local_lock_none: |
781 | ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | | |
782 | NFS_MOUNT_LOCAL_FCNTL); | |
9954bf92 | 783 | break; |
cbd071b5 | 784 | default: |
e38bb238 | 785 | goto out_invalid_value; |
cbd071b5 DH |
786 | } |
787 | break; | |
a0492339 TM |
788 | case Opt_write: |
789 | switch (result.uint_32) { | |
790 | case Opt_write_lazy: | |
791 | ctx->flags &= | |
792 | ~(NFS_MOUNT_WRITE_EAGER | NFS_MOUNT_WRITE_WAIT); | |
793 | break; | |
794 | case Opt_write_eager: | |
795 | ctx->flags |= NFS_MOUNT_WRITE_EAGER; | |
796 | ctx->flags &= ~NFS_MOUNT_WRITE_WAIT; | |
797 | break; | |
798 | case Opt_write_wait: | |
799 | ctx->flags |= | |
800 | NFS_MOUNT_WRITE_EAGER | NFS_MOUNT_WRITE_WAIT; | |
801 | break; | |
802 | default: | |
803 | goto out_invalid_value; | |
804 | } | |
805 | break; | |
9954bf92 DH |
806 | |
807 | /* | |
808 | * Special options | |
809 | */ | |
cbd071b5 | 810 | case Opt_sloppy: |
e38bb238 | 811 | ctx->sloppy = true; |
cbd071b5 DH |
812 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); |
813 | break; | |
9954bf92 DH |
814 | } |
815 | ||
f8ee01e3 DH |
816 | return 0; |
817 | ||
f8ee01e3 | 818 | out_invalid_value: |
ce8866f0 | 819 | return nfs_invalf(fc, "NFS: Bad mount option value specified"); |
e38bb238 | 820 | out_invalid_address: |
ce8866f0 | 821 | return nfs_invalf(fc, "NFS: Bad IP address specified"); |
e38bb238 | 822 | out_of_bounds: |
3a21409a | 823 | return nfs_invalf(fc, "NFS: Value for '%s' out of range", param->key); |
1c3695d0 TM |
824 | out_bad_transport: |
825 | return nfs_invalf(fc, "NFS: Unrecognized transport protocol"); | |
e38bb238 SM |
826 | } |
827 | ||
9954bf92 | 828 | /* |
62a55d08 | 829 | * Split fc->source into "hostname:export_path". |
9954bf92 DH |
830 | * |
831 | * The leftmost colon demarks the split between the server's hostname | |
832 | * and the export path. If the hostname starts with a left square | |
833 | * bracket, then it may contain colons. | |
834 | * | |
835 | * Note: caller frees hostname and export path, even on error. | |
836 | */ | |
62a55d08 SM |
837 | static int nfs_parse_source(struct fs_context *fc, |
838 | size_t maxnamlen, size_t maxpathlen) | |
9954bf92 | 839 | { |
62a55d08 SM |
840 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
841 | const char *dev_name = fc->source; | |
9954bf92 | 842 | size_t len; |
62a55d08 | 843 | const char *end; |
9954bf92 DH |
844 | |
845 | if (unlikely(!dev_name || !*dev_name)) { | |
846 | dfprintk(MOUNT, "NFS: device name not specified\n"); | |
847 | return -EINVAL; | |
848 | } | |
849 | ||
850 | /* Is the host name protected with square brakcets? */ | |
851 | if (*dev_name == '[') { | |
852 | end = strchr(++dev_name, ']'); | |
853 | if (end == NULL || end[1] != ':') | |
854 | goto out_bad_devname; | |
855 | ||
856 | len = end - dev_name; | |
857 | end++; | |
858 | } else { | |
62a55d08 | 859 | const char *comma; |
9954bf92 DH |
860 | |
861 | end = strchr(dev_name, ':'); | |
862 | if (end == NULL) | |
863 | goto out_bad_devname; | |
864 | len = end - dev_name; | |
865 | ||
866 | /* kill possible hostname list: not supported */ | |
62a55d08 SM |
867 | comma = memchr(dev_name, ',', len); |
868 | if (comma) | |
9954bf92 DH |
869 | len = comma - dev_name; |
870 | } | |
871 | ||
872 | if (len > maxnamlen) | |
873 | goto out_hostname; | |
874 | ||
75a9b917 SM |
875 | kfree(ctx->nfs_server.hostname); |
876 | ||
9954bf92 | 877 | /* N.B. caller will free nfs_server.hostname in all cases */ |
e558100f DH |
878 | ctx->nfs_server.hostname = kmemdup_nul(dev_name, len, GFP_KERNEL); |
879 | if (!ctx->nfs_server.hostname) | |
9954bf92 DH |
880 | goto out_nomem; |
881 | len = strlen(++end); | |
882 | if (len > maxpathlen) | |
883 | goto out_path; | |
e558100f DH |
884 | ctx->nfs_server.export_path = kmemdup_nul(end, len, GFP_KERNEL); |
885 | if (!ctx->nfs_server.export_path) | |
9954bf92 DH |
886 | goto out_nomem; |
887 | ||
e558100f | 888 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", ctx->nfs_server.export_path); |
9954bf92 DH |
889 | return 0; |
890 | ||
891 | out_bad_devname: | |
ce8866f0 | 892 | return nfs_invalf(fc, "NFS: device name not in host:path format"); |
9954bf92 | 893 | out_nomem: |
ce8866f0 | 894 | nfs_errorf(fc, "NFS: not enough memory to parse device name"); |
9954bf92 | 895 | return -ENOMEM; |
9954bf92 | 896 | out_hostname: |
ce8866f0 | 897 | nfs_errorf(fc, "NFS: server hostname too long"); |
9954bf92 | 898 | return -ENAMETOOLONG; |
9954bf92 | 899 | out_path: |
ce8866f0 | 900 | nfs_errorf(fc, "NFS: export pathname too long"); |
9954bf92 DH |
901 | return -ENAMETOOLONG; |
902 | } | |
903 | ||
f2aedb71 DH |
904 | static inline bool is_remount_fc(struct fs_context *fc) |
905 | { | |
906 | return fc->root != NULL; | |
907 | } | |
908 | ||
9954bf92 | 909 | /* |
e558100f | 910 | * Parse monolithic NFS2/NFS3 mount data |
9954bf92 DH |
911 | * - fills in the mount root filehandle |
912 | * | |
913 | * For option strings, user space handles the following behaviors: | |
914 | * | |
915 | * + DNS: mapping server host name to IP address ("addr=" option) | |
916 | * | |
917 | * + failure mode: how to behave if a mount request can't be handled | |
918 | * immediately ("fg/bg" option) | |
919 | * | |
920 | * + retry: how often to retry a mount request ("retry=" option) | |
921 | * | |
922 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
923 | * mountproto=tcp after mountproto=udp, and so on | |
924 | */ | |
f2aedb71 DH |
925 | static int nfs23_parse_monolithic(struct fs_context *fc, |
926 | struct nfs_mount_data *data) | |
9954bf92 | 927 | { |
f2aedb71 | 928 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
62a55d08 | 929 | struct nfs_fh *mntfh = ctx->mntfh; |
5eb005ca | 930 | struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; |
9954bf92 DH |
931 | int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; |
932 | ||
933 | if (data == NULL) | |
934 | goto out_no_data; | |
935 | ||
5eb005ca | 936 | ctx->version = NFS_DEFAULT_VERSION; |
9954bf92 DH |
937 | switch (data->version) { |
938 | case 1: | |
df561f66 GS |
939 | data->namlen = 0; |
940 | fallthrough; | |
9954bf92 | 941 | case 2: |
df561f66 GS |
942 | data->bsize = 0; |
943 | fallthrough; | |
9954bf92 DH |
944 | case 3: |
945 | if (data->flags & NFS_MOUNT_VER3) | |
946 | goto out_no_v3; | |
947 | data->root.size = NFS2_FHSIZE; | |
948 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
949 | /* Turn off security negotiation */ | |
950 | extra_flags |= NFS_MOUNT_SECFLAVOUR; | |
df561f66 | 951 | fallthrough; |
9954bf92 DH |
952 | case 4: |
953 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
954 | goto out_no_sec; | |
df561f66 | 955 | fallthrough; |
9954bf92 DH |
956 | case 5: |
957 | memset(data->context, 0, sizeof(data->context)); | |
df561f66 | 958 | fallthrough; |
9954bf92 DH |
959 | case 6: |
960 | if (data->flags & NFS_MOUNT_VER3) { | |
961 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
962 | goto out_invalid_fh; | |
963 | mntfh->size = data->root.size; | |
5eb005ca | 964 | ctx->version = 3; |
9954bf92 DH |
965 | } else { |
966 | mntfh->size = NFS2_FHSIZE; | |
5eb005ca | 967 | ctx->version = 2; |
9954bf92 DH |
968 | } |
969 | ||
970 | ||
971 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
972 | if (mntfh->size < sizeof(mntfh->data)) | |
973 | memset(mntfh->data + mntfh->size, 0, | |
974 | sizeof(mntfh->data) - mntfh->size); | |
975 | ||
976 | /* | |
5eb005ca | 977 | * Translate to nfs_fs_context, which nfs_fill_super |
9954bf92 DH |
978 | * can deal with. |
979 | */ | |
5eb005ca DH |
980 | ctx->flags = data->flags & NFS_MOUNT_FLAGMASK; |
981 | ctx->flags |= extra_flags; | |
982 | ctx->rsize = data->rsize; | |
983 | ctx->wsize = data->wsize; | |
984 | ctx->timeo = data->timeo; | |
985 | ctx->retrans = data->retrans; | |
986 | ctx->acregmin = data->acregmin; | |
987 | ctx->acregmax = data->acregmax; | |
988 | ctx->acdirmin = data->acdirmin; | |
989 | ctx->acdirmax = data->acdirmax; | |
990 | ctx->need_mount = false; | |
9954bf92 DH |
991 | |
992 | memcpy(sap, &data->addr, sizeof(data->addr)); | |
5eb005ca DH |
993 | ctx->nfs_server.addrlen = sizeof(data->addr); |
994 | ctx->nfs_server.port = ntohs(data->addr.sin_port); | |
9954bf92 DH |
995 | if (sap->sa_family != AF_INET || |
996 | !nfs_verify_server_address(sap)) | |
997 | goto out_no_address; | |
998 | ||
999 | if (!(data->flags & NFS_MOUNT_TCP)) | |
5eb005ca | 1000 | ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
9954bf92 | 1001 | /* N.B. caller will free nfs_server.hostname in all cases */ |
5eb005ca | 1002 | ctx->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); |
f2aedb71 DH |
1003 | if (!ctx->nfs_server.hostname) |
1004 | goto out_nomem; | |
1005 | ||
5eb005ca DH |
1006 | ctx->namlen = data->namlen; |
1007 | ctx->bsize = data->bsize; | |
9954bf92 DH |
1008 | |
1009 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
5eb005ca | 1010 | ctx->selected_flavor = data->pseudoflavor; |
9954bf92 | 1011 | else |
5eb005ca | 1012 | ctx->selected_flavor = RPC_AUTH_UNIX; |
9954bf92 DH |
1013 | |
1014 | if (!(data->flags & NFS_MOUNT_NONLM)) | |
5eb005ca | 1015 | ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| |
9954bf92 DH |
1016 | NFS_MOUNT_LOCAL_FCNTL); |
1017 | else | |
5eb005ca | 1018 | ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK| |
9954bf92 | 1019 | NFS_MOUNT_LOCAL_FCNTL); |
62a55d08 | 1020 | |
9954bf92 DH |
1021 | /* |
1022 | * The legacy version 6 binary mount data from userspace has a | |
1023 | * field used only to transport selinux information into the | |
a5032910 | 1024 | * kernel. To continue to support that functionality we |
9954bf92 DH |
1025 | * have a touch of selinux knowledge here in the NFS code. The |
1026 | * userspace code converted context=blah to just blah so we are | |
1027 | * converting back to the full string selinux understands. | |
1028 | */ | |
1029 | if (data->context[0]){ | |
1030 | #ifdef CONFIG_SECURITY_SELINUX | |
f2aedb71 DH |
1031 | int ret; |
1032 | ||
9954bf92 | 1033 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; |
f2aedb71 DH |
1034 | ret = vfs_parse_fs_string(fc, "context", |
1035 | data->context, strlen(data->context)); | |
1036 | if (ret < 0) | |
1037 | return ret; | |
9954bf92 DH |
1038 | #else |
1039 | return -EINVAL; | |
1040 | #endif | |
1041 | } | |
1042 | ||
1043 | break; | |
1044 | default: | |
f2aedb71 | 1045 | goto generic; |
9954bf92 DH |
1046 | } |
1047 | ||
f2aedb71 | 1048 | ctx->skip_reconfig_option_check = true; |
9954bf92 DH |
1049 | return 0; |
1050 | ||
f2aedb71 DH |
1051 | generic: |
1052 | return generic_parse_monolithic(fc, data); | |
1053 | ||
9954bf92 | 1054 | out_no_data: |
f2aedb71 DH |
1055 | if (is_remount_fc(fc)) { |
1056 | ctx->skip_reconfig_option_check = true; | |
1057 | return 0; | |
1058 | } | |
ce8866f0 | 1059 | return nfs_invalf(fc, "NFS: mount program didn't pass any mount data"); |
9954bf92 DH |
1060 | |
1061 | out_no_v3: | |
ce8866f0 | 1062 | return nfs_invalf(fc, "NFS: nfs_mount_data version does not support v3"); |
9954bf92 DH |
1063 | |
1064 | out_no_sec: | |
ce8866f0 | 1065 | return nfs_invalf(fc, "NFS: nfs_mount_data version supports only AUTH_SYS"); |
9954bf92 DH |
1066 | |
1067 | out_nomem: | |
ce8866f0 | 1068 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options"); |
9954bf92 DH |
1069 | return -ENOMEM; |
1070 | ||
1071 | out_no_address: | |
ce8866f0 | 1072 | return nfs_invalf(fc, "NFS: mount program didn't pass remote address"); |
9954bf92 DH |
1073 | |
1074 | out_invalid_fh: | |
ce8866f0 | 1075 | return nfs_invalf(fc, "NFS: invalid root filehandle"); |
9954bf92 DH |
1076 | } |
1077 | ||
1078 | #if IS_ENABLED(CONFIG_NFS_V4) | |
67e306c6 CH |
1079 | struct compat_nfs_string { |
1080 | compat_uint_t len; | |
1081 | compat_uptr_t data; | |
1082 | }; | |
1083 | ||
1084 | static inline void compat_nfs_string(struct nfs_string *dst, | |
1085 | struct compat_nfs_string *src) | |
1086 | { | |
1087 | dst->data = compat_ptr(src->data); | |
1088 | dst->len = src->len; | |
1089 | } | |
1090 | ||
1091 | struct compat_nfs4_mount_data_v1 { | |
1092 | compat_int_t version; | |
1093 | compat_int_t flags; | |
1094 | compat_int_t rsize; | |
1095 | compat_int_t wsize; | |
1096 | compat_int_t timeo; | |
1097 | compat_int_t retrans; | |
1098 | compat_int_t acregmin; | |
1099 | compat_int_t acregmax; | |
1100 | compat_int_t acdirmin; | |
1101 | compat_int_t acdirmax; | |
1102 | struct compat_nfs_string client_addr; | |
1103 | struct compat_nfs_string mnt_path; | |
1104 | struct compat_nfs_string hostname; | |
1105 | compat_uint_t host_addrlen; | |
1106 | compat_uptr_t host_addr; | |
1107 | compat_int_t proto; | |
1108 | compat_int_t auth_flavourlen; | |
1109 | compat_uptr_t auth_flavours; | |
1110 | }; | |
1111 | ||
1112 | static void nfs4_compat_mount_data_conv(struct nfs4_mount_data *data) | |
1113 | { | |
1114 | struct compat_nfs4_mount_data_v1 *compat = | |
1115 | (struct compat_nfs4_mount_data_v1 *)data; | |
1116 | ||
1117 | /* copy the fields backwards */ | |
1118 | data->auth_flavours = compat_ptr(compat->auth_flavours); | |
1119 | data->auth_flavourlen = compat->auth_flavourlen; | |
1120 | data->proto = compat->proto; | |
1121 | data->host_addr = compat_ptr(compat->host_addr); | |
1122 | data->host_addrlen = compat->host_addrlen; | |
1123 | compat_nfs_string(&data->hostname, &compat->hostname); | |
1124 | compat_nfs_string(&data->mnt_path, &compat->mnt_path); | |
1125 | compat_nfs_string(&data->client_addr, &compat->client_addr); | |
1126 | data->acdirmax = compat->acdirmax; | |
1127 | data->acdirmin = compat->acdirmin; | |
1128 | data->acregmax = compat->acregmax; | |
1129 | data->acregmin = compat->acregmin; | |
1130 | data->retrans = compat->retrans; | |
1131 | data->timeo = compat->timeo; | |
1132 | data->wsize = compat->wsize; | |
1133 | data->rsize = compat->rsize; | |
1134 | data->flags = compat->flags; | |
1135 | data->version = compat->version; | |
1136 | } | |
1137 | ||
9954bf92 DH |
1138 | /* |
1139 | * Validate NFSv4 mount options | |
1140 | */ | |
f2aedb71 DH |
1141 | static int nfs4_parse_monolithic(struct fs_context *fc, |
1142 | struct nfs4_mount_data *data) | |
9954bf92 | 1143 | { |
f2aedb71 | 1144 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
5eb005ca | 1145 | struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; |
9954bf92 DH |
1146 | char *c; |
1147 | ||
a1c7dc5d CH |
1148 | if (!data) { |
1149 | if (is_remount_fc(fc)) | |
1150 | goto done; | |
1151 | return nfs_invalf(fc, | |
1152 | "NFS4: mount program didn't pass any mount data"); | |
1153 | } | |
9954bf92 | 1154 | |
5eb005ca | 1155 | ctx->version = 4; |
9954bf92 | 1156 | |
a1c7dc5d CH |
1157 | if (data->version != 1) |
1158 | return generic_parse_monolithic(fc, data); | |
1159 | ||
67e306c6 CH |
1160 | if (in_compat_syscall()) |
1161 | nfs4_compat_mount_data_conv(data); | |
1162 | ||
a1c7dc5d CH |
1163 | if (data->host_addrlen > sizeof(ctx->nfs_server.address)) |
1164 | goto out_no_address; | |
1165 | if (data->host_addrlen == 0) | |
1166 | goto out_no_address; | |
1167 | ctx->nfs_server.addrlen = data->host_addrlen; | |
1168 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) | |
1169 | return -EFAULT; | |
1170 | if (!nfs_verify_server_address(sap)) | |
1171 | goto out_no_address; | |
1172 | ctx->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); | |
1173 | ||
1174 | if (data->auth_flavourlen) { | |
1175 | rpc_authflavor_t pseudoflavor; | |
1176 | ||
1177 | if (data->auth_flavourlen > 1) | |
1178 | goto out_inval_auth; | |
1179 | if (copy_from_user(&pseudoflavor, data->auth_flavours, | |
1180 | sizeof(pseudoflavor))) | |
9954bf92 | 1181 | return -EFAULT; |
a1c7dc5d CH |
1182 | ctx->selected_flavor = pseudoflavor; |
1183 | } else { | |
1184 | ctx->selected_flavor = RPC_AUTH_UNIX; | |
9954bf92 DH |
1185 | } |
1186 | ||
a1c7dc5d CH |
1187 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); |
1188 | if (IS_ERR(c)) | |
1189 | return PTR_ERR(c); | |
1190 | ctx->nfs_server.hostname = c; | |
1191 | ||
1192 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
1193 | if (IS_ERR(c)) | |
1194 | return PTR_ERR(c); | |
1195 | ctx->nfs_server.export_path = c; | |
1196 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
1197 | ||
1198 | c = strndup_user(data->client_addr.data, 16); | |
1199 | if (IS_ERR(c)) | |
1200 | return PTR_ERR(c); | |
1201 | ctx->client_address = c; | |
1202 | ||
1203 | /* | |
1204 | * Translate to nfs_fs_context, which nfs_fill_super | |
1205 | * can deal with. | |
1206 | */ | |
1207 | ||
1208 | ctx->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
1209 | ctx->rsize = data->rsize; | |
1210 | ctx->wsize = data->wsize; | |
1211 | ctx->timeo = data->timeo; | |
1212 | ctx->retrans = data->retrans; | |
1213 | ctx->acregmin = data->acregmin; | |
1214 | ctx->acregmax = data->acregmax; | |
1215 | ctx->acdirmin = data->acdirmin; | |
1216 | ctx->acdirmax = data->acdirmax; | |
1217 | ctx->nfs_server.protocol = data->proto; | |
1218 | nfs_validate_transport_protocol(ctx); | |
1219 | if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) | |
1220 | goto out_invalid_transport_udp; | |
1221 | done: | |
f2aedb71 | 1222 | ctx->skip_reconfig_option_check = true; |
9954bf92 DH |
1223 | return 0; |
1224 | ||
9954bf92 | 1225 | out_inval_auth: |
ce8866f0 SM |
1226 | return nfs_invalf(fc, "NFS4: Invalid number of RPC auth flavours %d", |
1227 | data->auth_flavourlen); | |
9954bf92 DH |
1228 | |
1229 | out_no_address: | |
ce8866f0 | 1230 | return nfs_invalf(fc, "NFS4: mount program didn't pass remote address"); |
9954bf92 DH |
1231 | |
1232 | out_invalid_transport_udp: | |
aa3367c9 | 1233 | return nfs_invalf(fc, "NFS: Unsupported transport protocol udp"); |
9954bf92 | 1234 | } |
f2aedb71 | 1235 | #endif |
9954bf92 | 1236 | |
f2aedb71 DH |
1237 | /* |
1238 | * Parse a monolithic block of data from sys_mount(). | |
1239 | */ | |
1240 | static int nfs_fs_context_parse_monolithic(struct fs_context *fc, | |
1241 | void *data) | |
9954bf92 | 1242 | { |
f2aedb71 DH |
1243 | if (fc->fs_type == &nfs_fs_type) |
1244 | return nfs23_parse_monolithic(fc, data); | |
1245 | ||
1246 | #if IS_ENABLED(CONFIG_NFS_V4) | |
1247 | if (fc->fs_type == &nfs4_fs_type) | |
1248 | return nfs4_parse_monolithic(fc, data); | |
9954bf92 DH |
1249 | #endif |
1250 | ||
ce8866f0 | 1251 | return nfs_invalf(fc, "NFS: Unsupported monolithic data version"); |
f2aedb71 DH |
1252 | } |
1253 | ||
1254 | /* | |
1255 | * Validate the preparsed information in the config. | |
1256 | */ | |
1257 | static int nfs_fs_context_validate(struct fs_context *fc) | |
9954bf92 | 1258 | { |
f2aedb71 DH |
1259 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
1260 | struct nfs_subversion *nfs_mod; | |
1261 | struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; | |
9954bf92 DH |
1262 | int max_namelen = PAGE_SIZE; |
1263 | int max_pathlen = NFS_MAXPATHLEN; | |
f2aedb71 DH |
1264 | int port = 0; |
1265 | int ret; | |
9954bf92 | 1266 | |
f2aedb71 DH |
1267 | if (!fc->source) |
1268 | goto out_no_device_name; | |
1269 | ||
1270 | /* Check for sanity first. */ | |
1271 | if (ctx->minorversion && ctx->version != 4) | |
1272 | goto out_minorversion_mismatch; | |
1273 | ||
1274 | if (ctx->options & NFS_OPTION_MIGRATION && | |
1275 | (ctx->version != 4 || ctx->minorversion != 0)) | |
1276 | goto out_migration_misuse; | |
1277 | ||
1278 | /* Verify that any proto=/mountproto= options match the address | |
1279 | * families in the addr=/mountaddr= options. | |
1280 | */ | |
1281 | if (ctx->protofamily != AF_UNSPEC && | |
1282 | ctx->protofamily != ctx->nfs_server.address.sa_family) | |
1283 | goto out_proto_mismatch; | |
1284 | ||
1285 | if (ctx->mountfamily != AF_UNSPEC) { | |
1286 | if (ctx->mount_server.addrlen) { | |
1287 | if (ctx->mountfamily != ctx->mount_server.address.sa_family) | |
1288 | goto out_mountproto_mismatch; | |
1289 | } else { | |
1290 | if (ctx->mountfamily != ctx->nfs_server.address.sa_family) | |
1291 | goto out_mountproto_mismatch; | |
1292 | } | |
1293 | } | |
9954bf92 DH |
1294 | |
1295 | if (!nfs_verify_server_address(sap)) | |
1296 | goto out_no_address; | |
1297 | ||
5eb005ca | 1298 | if (ctx->version == 4) { |
62a55d08 SM |
1299 | if (IS_ENABLED(CONFIG_NFS_V4)) { |
1300 | if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) | |
1301 | port = NFS_RDMA_PORT; | |
1302 | else | |
1303 | port = NFS_PORT; | |
1304 | max_namelen = NFS4_MAXNAMLEN; | |
1305 | max_pathlen = NFS4_MAXPATHLEN; | |
1306 | nfs_validate_transport_protocol(ctx); | |
1307 | if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) | |
1308 | goto out_invalid_transport_udp; | |
1309 | ctx->flags &= ~(NFS_MOUNT_NONLM | NFS_MOUNT_NOACL | | |
1310 | NFS_MOUNT_VER3 | NFS_MOUNT_LOCAL_FLOCK | | |
1311 | NFS_MOUNT_LOCAL_FCNTL); | |
1312 | } else { | |
1313 | goto out_v4_not_compiled; | |
1314 | } | |
9954bf92 | 1315 | } else { |
5eb005ca | 1316 | nfs_set_mount_transport_protocol(ctx); |
b24ee6c6 OK |
1317 | #ifdef CONFIG_NFS_DISABLE_UDP_SUPPORT |
1318 | if (ctx->nfs_server.protocol == XPRT_TRANSPORT_UDP) | |
1319 | goto out_invalid_transport_udp; | |
1320 | #endif | |
5eb005ca | 1321 | if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) |
9954bf92 DH |
1322 | port = NFS_RDMA_PORT; |
1323 | } | |
1324 | ||
5eb005ca | 1325 | nfs_set_port(sap, &ctx->nfs_server.port, port); |
9954bf92 | 1326 | |
62a55d08 | 1327 | ret = nfs_parse_source(fc, max_namelen, max_pathlen); |
f2aedb71 DH |
1328 | if (ret < 0) |
1329 | return ret; | |
1330 | ||
1331 | /* Load the NFS protocol module if we haven't done so yet */ | |
62a55d08 | 1332 | if (!ctx->nfs_mod) { |
f2aedb71 DH |
1333 | nfs_mod = get_nfs_version(ctx->version); |
1334 | if (IS_ERR(nfs_mod)) { | |
1335 | ret = PTR_ERR(nfs_mod); | |
1336 | goto out_version_unavailable; | |
1337 | } | |
62a55d08 | 1338 | ctx->nfs_mod = nfs_mod; |
f2aedb71 | 1339 | } |
1cef2184 SM |
1340 | |
1341 | /* Ensure the filesystem context has the correct fs_type */ | |
1342 | if (fc->fs_type != ctx->nfs_mod->nfs_fs) { | |
1343 | module_put(fc->fs_type->owner); | |
1344 | __module_get(ctx->nfs_mod->nfs_fs->owner); | |
1345 | fc->fs_type = ctx->nfs_mod->nfs_fs; | |
1346 | } | |
f2aedb71 | 1347 | return 0; |
9954bf92 | 1348 | |
f2aedb71 | 1349 | out_no_device_name: |
ce8866f0 | 1350 | return nfs_invalf(fc, "NFS: Device name not specified"); |
9954bf92 | 1351 | out_v4_not_compiled: |
ce8866f0 | 1352 | nfs_errorf(fc, "NFS: NFSv4 is not compiled into kernel"); |
9954bf92 | 1353 | return -EPROTONOSUPPORT; |
9954bf92 | 1354 | out_invalid_transport_udp: |
aa3367c9 | 1355 | return nfs_invalf(fc, "NFS: Unsupported transport protocol udp"); |
9954bf92 | 1356 | out_no_address: |
ce8866f0 | 1357 | return nfs_invalf(fc, "NFS: mount program didn't pass remote address"); |
f2aedb71 | 1358 | out_mountproto_mismatch: |
ce8866f0 | 1359 | return nfs_invalf(fc, "NFS: Mount server address does not match mountproto= option"); |
f2aedb71 | 1360 | out_proto_mismatch: |
ce8866f0 | 1361 | return nfs_invalf(fc, "NFS: Server address does not match proto= option"); |
f2aedb71 | 1362 | out_minorversion_mismatch: |
ce8866f0 | 1363 | return nfs_invalf(fc, "NFS: Mount option vers=%u does not support minorversion=%u", |
f2aedb71 | 1364 | ctx->version, ctx->minorversion); |
f2aedb71 | 1365 | out_migration_misuse: |
ce8866f0 | 1366 | return nfs_invalf(fc, "NFS: 'Migration' not supported for this NFS version"); |
f2aedb71 | 1367 | out_version_unavailable: |
ce8866f0 | 1368 | nfs_errorf(fc, "NFS: Version unavailable"); |
f2aedb71 DH |
1369 | return ret; |
1370 | } | |
1371 | ||
1372 | /* | |
1373 | * Create an NFS superblock by the appropriate method. | |
1374 | */ | |
1375 | static int nfs_get_tree(struct fs_context *fc) | |
1376 | { | |
1377 | struct nfs_fs_context *ctx = nfs_fc2context(fc); | |
1378 | int err = nfs_fs_context_validate(fc); | |
1379 | ||
1380 | if (err) | |
1381 | return err; | |
1382 | if (!ctx->internal) | |
62a55d08 | 1383 | return ctx->nfs_mod->rpc_ops->try_get_tree(fc); |
f2aedb71 DH |
1384 | else |
1385 | return nfs_get_tree_common(fc); | |
9954bf92 | 1386 | } |
f2aedb71 DH |
1387 | |
1388 | /* | |
1389 | * Handle duplication of a configuration. The caller copied *src into *sc, but | |
1390 | * it can't deal with resource pointers in the filesystem context, so we have | |
1391 | * to do that. We need to clear pointers, copy data or get extra refs as | |
1392 | * appropriate. | |
1393 | */ | |
1394 | static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc) | |
1395 | { | |
1396 | struct nfs_fs_context *src = nfs_fc2context(src_fc), *ctx; | |
1397 | ||
1398 | ctx = kmemdup(src, sizeof(struct nfs_fs_context), GFP_KERNEL); | |
1399 | if (!ctx) | |
1400 | return -ENOMEM; | |
1401 | ||
62a55d08 SM |
1402 | ctx->mntfh = nfs_alloc_fhandle(); |
1403 | if (!ctx->mntfh) { | |
f2aedb71 DH |
1404 | kfree(ctx); |
1405 | return -ENOMEM; | |
1406 | } | |
62a55d08 | 1407 | nfs_copy_fh(ctx->mntfh, src->mntfh); |
f2aedb71 | 1408 | |
62a55d08 | 1409 | __module_get(ctx->nfs_mod->owner); |
f2aedb71 DH |
1410 | ctx->client_address = NULL; |
1411 | ctx->mount_server.hostname = NULL; | |
1412 | ctx->nfs_server.export_path = NULL; | |
1413 | ctx->nfs_server.hostname = NULL; | |
1414 | ctx->fscache_uniq = NULL; | |
f2aedb71 DH |
1415 | ctx->clone_data.fattr = NULL; |
1416 | fc->fs_private = ctx; | |
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | static void nfs_fs_context_free(struct fs_context *fc) | |
1421 | { | |
1422 | struct nfs_fs_context *ctx = nfs_fc2context(fc); | |
1423 | ||
1424 | if (ctx) { | |
62a55d08 SM |
1425 | if (ctx->server) |
1426 | nfs_free_server(ctx->server); | |
1427 | if (ctx->nfs_mod) | |
1428 | put_nfs_version(ctx->nfs_mod); | |
f2aedb71 DH |
1429 | kfree(ctx->client_address); |
1430 | kfree(ctx->mount_server.hostname); | |
1431 | kfree(ctx->nfs_server.export_path); | |
1432 | kfree(ctx->nfs_server.hostname); | |
1433 | kfree(ctx->fscache_uniq); | |
62a55d08 | 1434 | nfs_free_fhandle(ctx->mntfh); |
f2aedb71 DH |
1435 | nfs_free_fattr(ctx->clone_data.fattr); |
1436 | kfree(ctx); | |
1437 | } | |
1438 | } | |
1439 | ||
1440 | static const struct fs_context_operations nfs_fs_context_ops = { | |
1441 | .free = nfs_fs_context_free, | |
1442 | .dup = nfs_fs_context_dup, | |
1443 | .parse_param = nfs_fs_context_parse_param, | |
1444 | .parse_monolithic = nfs_fs_context_parse_monolithic, | |
1445 | .get_tree = nfs_get_tree, | |
1446 | .reconfigure = nfs_reconfigure, | |
1447 | }; | |
1448 | ||
1449 | /* | |
1450 | * Prepare superblock configuration. We use the namespaces attached to the | |
1451 | * context. This may be the current process's namespaces, or it may be a | |
1452 | * container's namespaces. | |
1453 | */ | |
1454 | static int nfs_init_fs_context(struct fs_context *fc) | |
1455 | { | |
1456 | struct nfs_fs_context *ctx; | |
1457 | ||
1458 | ctx = kzalloc(sizeof(struct nfs_fs_context), GFP_KERNEL); | |
1459 | if (unlikely(!ctx)) | |
1460 | return -ENOMEM; | |
1461 | ||
62a55d08 SM |
1462 | ctx->mntfh = nfs_alloc_fhandle(); |
1463 | if (unlikely(!ctx->mntfh)) { | |
f2aedb71 DH |
1464 | kfree(ctx); |
1465 | return -ENOMEM; | |
1466 | } | |
1467 | ||
1468 | ctx->protofamily = AF_UNSPEC; | |
1469 | ctx->mountfamily = AF_UNSPEC; | |
1470 | ctx->mount_server.port = NFS_UNSPEC_PORT; | |
1471 | ||
1472 | if (fc->root) { | |
1473 | /* reconfigure, start with the current config */ | |
1474 | struct nfs_server *nfss = fc->root->d_sb->s_fs_info; | |
1475 | struct net *net = nfss->nfs_client->cl_net; | |
1476 | ||
1477 | ctx->flags = nfss->flags; | |
1478 | ctx->rsize = nfss->rsize; | |
1479 | ctx->wsize = nfss->wsize; | |
1480 | ctx->retrans = nfss->client->cl_timeout->to_retries; | |
1481 | ctx->selected_flavor = nfss->client->cl_auth->au_flavor; | |
1482 | ctx->acregmin = nfss->acregmin / HZ; | |
1483 | ctx->acregmax = nfss->acregmax / HZ; | |
1484 | ctx->acdirmin = nfss->acdirmin / HZ; | |
1485 | ctx->acdirmax = nfss->acdirmax / HZ; | |
1486 | ctx->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
1487 | ctx->nfs_server.port = nfss->port; | |
1488 | ctx->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; | |
1489 | ctx->version = nfss->nfs_client->rpc_ops->version; | |
1490 | ctx->minorversion = nfss->nfs_client->cl_minorversion; | |
1491 | ||
1492 | memcpy(&ctx->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1493 | ctx->nfs_server.addrlen); | |
1494 | ||
1495 | if (fc->net_ns != net) { | |
1496 | put_net(fc->net_ns); | |
1497 | fc->net_ns = get_net(net); | |
1498 | } | |
1499 | ||
62a55d08 SM |
1500 | ctx->nfs_mod = nfss->nfs_client->cl_nfs_mod; |
1501 | __module_get(ctx->nfs_mod->owner); | |
f2aedb71 DH |
1502 | } else { |
1503 | /* defaults */ | |
1504 | ctx->timeo = NFS_UNSPEC_TIMEO; | |
1505 | ctx->retrans = NFS_UNSPEC_RETRANS; | |
1506 | ctx->acregmin = NFS_DEF_ACREGMIN; | |
1507 | ctx->acregmax = NFS_DEF_ACREGMAX; | |
1508 | ctx->acdirmin = NFS_DEF_ACDIRMIN; | |
1509 | ctx->acdirmax = NFS_DEF_ACDIRMAX; | |
1510 | ctx->nfs_server.port = NFS_UNSPEC_PORT; | |
1511 | ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
1512 | ctx->selected_flavor = RPC_AUTH_MAXFLAVOR; | |
1513 | ctx->minorversion = 0; | |
1514 | ctx->need_mount = true; | |
1515 | } | |
f2aedb71 DH |
1516 | fc->fs_private = ctx; |
1517 | fc->ops = &nfs_fs_context_ops; | |
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | struct file_system_type nfs_fs_type = { | |
1522 | .owner = THIS_MODULE, | |
1523 | .name = "nfs", | |
1524 | .init_fs_context = nfs_init_fs_context, | |
d7167b14 | 1525 | .parameters = nfs_fs_parameters, |
f2aedb71 DH |
1526 | .kill_sb = nfs_kill_super, |
1527 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, | |
1528 | }; | |
1529 | MODULE_ALIAS_FS("nfs"); | |
1530 | EXPORT_SYMBOL_GPL(nfs_fs_type); | |
1531 | ||
1532 | #if IS_ENABLED(CONFIG_NFS_V4) | |
1533 | struct file_system_type nfs4_fs_type = { | |
1534 | .owner = THIS_MODULE, | |
1535 | .name = "nfs4", | |
1536 | .init_fs_context = nfs_init_fs_context, | |
d7167b14 | 1537 | .parameters = nfs_fs_parameters, |
f2aedb71 DH |
1538 | .kill_sb = nfs_kill_super, |
1539 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, | |
1540 | }; | |
1541 | MODULE_ALIAS_FS("nfs4"); | |
1542 | MODULE_ALIAS("nfs4"); | |
1543 | EXPORT_SYMBOL_GPL(nfs4_fs_type); | |
1544 | #endif /* CONFIG_NFS_V4 */ |