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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, |
7e134205 | 63 | Opt_max_connect, |
e38bb238 SM |
64 | Opt_port, |
65 | Opt_posix, | |
66 | Opt_proto, | |
67 | Opt_rdirplus, | |
68 | Opt_rdma, | |
69 | Opt_resvport, | |
70 | Opt_retrans, | |
71 | Opt_retry, | |
72 | Opt_rsize, | |
73 | Opt_sec, | |
74 | Opt_sharecache, | |
75 | Opt_sloppy, | |
76 | Opt_soft, | |
77 | Opt_softerr, | |
c74dfe97 | 78 | Opt_softreval, |
e38bb238 SM |
79 | Opt_source, |
80 | Opt_tcp, | |
81 | Opt_timeo, | |
82 | Opt_udp, | |
83 | Opt_v, | |
84 | Opt_vers, | |
85 | Opt_wsize, | |
a0492339 | 86 | Opt_write, |
9954bf92 DH |
87 | }; |
88 | ||
2710c957 AV |
89 | enum { |
90 | Opt_local_lock_all, | |
91 | Opt_local_lock_flock, | |
92 | Opt_local_lock_none, | |
93 | Opt_local_lock_posix, | |
94 | }; | |
95 | ||
5eede625 | 96 | static const struct constant_table nfs_param_enums_local_lock[] = { |
2710c957 AV |
97 | { "all", Opt_local_lock_all }, |
98 | { "flock", Opt_local_lock_flock }, | |
a2d24bcb | 99 | { "posix", Opt_local_lock_posix }, |
2710c957 AV |
100 | { "none", Opt_local_lock_none }, |
101 | {} | |
102 | }; | |
103 | ||
104 | enum { | |
105 | Opt_lookupcache_all, | |
106 | Opt_lookupcache_none, | |
107 | Opt_lookupcache_positive, | |
108 | }; | |
109 | ||
5eede625 | 110 | static const struct constant_table nfs_param_enums_lookupcache[] = { |
2710c957 AV |
111 | { "all", Opt_lookupcache_all }, |
112 | { "none", Opt_lookupcache_none }, | |
113 | { "pos", Opt_lookupcache_positive }, | |
114 | { "positive", Opt_lookupcache_positive }, | |
115 | {} | |
116 | }; | |
117 | ||
a0492339 TM |
118 | enum { |
119 | Opt_write_lazy, | |
120 | Opt_write_eager, | |
121 | Opt_write_wait, | |
122 | }; | |
123 | ||
124 | static const struct constant_table nfs_param_enums_write[] = { | |
125 | { "lazy", Opt_write_lazy }, | |
126 | { "eager", Opt_write_eager }, | |
127 | { "wait", Opt_write_wait }, | |
128 | {} | |
129 | }; | |
130 | ||
d7167b14 | 131 | static const struct fs_parameter_spec nfs_fs_parameters[] = { |
e38bb238 SM |
132 | fsparam_flag_no("ac", Opt_ac), |
133 | fsparam_u32 ("acdirmax", Opt_acdirmax), | |
134 | fsparam_u32 ("acdirmin", Opt_acdirmin), | |
135 | fsparam_flag_no("acl", Opt_acl), | |
136 | fsparam_u32 ("acregmax", Opt_acregmax), | |
137 | fsparam_u32 ("acregmin", Opt_acregmin), | |
138 | fsparam_u32 ("actimeo", Opt_actimeo), | |
139 | fsparam_string("addr", Opt_addr), | |
140 | fsparam_flag ("bg", Opt_bg), | |
141 | fsparam_u32 ("bsize", Opt_bsize), | |
142 | fsparam_string("clientaddr", Opt_clientaddr), | |
143 | fsparam_flag_no("cto", Opt_cto), | |
144 | fsparam_flag ("fg", Opt_fg), | |
48ce73b1 AV |
145 | fsparam_flag_no("fsc", Opt_fscache_flag), |
146 | fsparam_string("fsc", Opt_fscache), | |
e38bb238 | 147 | fsparam_flag ("hard", Opt_hard), |
328de528 | 148 | __fsparam(NULL, "intr", Opt_intr, |
2710c957 AV |
149 | fs_param_neg_with_no|fs_param_deprecated, NULL), |
150 | fsparam_enum ("local_lock", Opt_local_lock, nfs_param_enums_local_lock), | |
e38bb238 | 151 | fsparam_flag_no("lock", Opt_lock), |
2710c957 | 152 | fsparam_enum ("lookupcache", Opt_lookupcache, nfs_param_enums_lookupcache), |
e38bb238 SM |
153 | fsparam_flag_no("migration", Opt_migration), |
154 | fsparam_u32 ("minorversion", Opt_minorversion), | |
155 | fsparam_string("mountaddr", Opt_mountaddr), | |
156 | fsparam_string("mounthost", Opt_mounthost), | |
157 | fsparam_u32 ("mountport", Opt_mountport), | |
158 | fsparam_string("mountproto", Opt_mountproto), | |
159 | fsparam_u32 ("mountvers", Opt_mountvers), | |
160 | fsparam_u32 ("namlen", Opt_namelen), | |
161 | fsparam_u32 ("nconnect", Opt_nconnect), | |
7e134205 | 162 | fsparam_u32 ("max_connect", Opt_max_connect), |
e38bb238 SM |
163 | fsparam_string("nfsvers", Opt_vers), |
164 | fsparam_u32 ("port", Opt_port), | |
165 | fsparam_flag_no("posix", Opt_posix), | |
166 | fsparam_string("proto", Opt_proto), | |
167 | fsparam_flag_no("rdirplus", Opt_rdirplus), | |
168 | fsparam_flag ("rdma", Opt_rdma), | |
169 | fsparam_flag_no("resvport", Opt_resvport), | |
170 | fsparam_u32 ("retrans", Opt_retrans), | |
171 | fsparam_string("retry", Opt_retry), | |
172 | fsparam_u32 ("rsize", Opt_rsize), | |
173 | fsparam_string("sec", Opt_sec), | |
174 | fsparam_flag_no("sharecache", Opt_sharecache), | |
175 | fsparam_flag ("sloppy", Opt_sloppy), | |
176 | fsparam_flag ("soft", Opt_soft), | |
177 | fsparam_flag ("softerr", Opt_softerr), | |
c74dfe97 | 178 | fsparam_flag ("softreval", Opt_softreval), |
e38bb238 SM |
179 | fsparam_string("source", Opt_source), |
180 | fsparam_flag ("tcp", Opt_tcp), | |
181 | fsparam_u32 ("timeo", Opt_timeo), | |
182 | fsparam_flag ("udp", Opt_udp), | |
183 | fsparam_flag ("v2", Opt_v), | |
184 | fsparam_flag ("v3", Opt_v), | |
185 | fsparam_flag ("v4", Opt_v), | |
186 | fsparam_flag ("v4.0", Opt_v), | |
187 | fsparam_flag ("v4.1", Opt_v), | |
188 | fsparam_flag ("v4.2", Opt_v), | |
189 | fsparam_string("vers", Opt_vers), | |
a0492339 | 190 | fsparam_enum ("write", Opt_write, nfs_param_enums_write), |
e38bb238 SM |
191 | fsparam_u32 ("wsize", Opt_wsize), |
192 | {} | |
9954bf92 DH |
193 | }; |
194 | ||
9954bf92 | 195 | enum { |
e38bb238 SM |
196 | Opt_vers_2, |
197 | Opt_vers_3, | |
198 | Opt_vers_4, | |
199 | Opt_vers_4_0, | |
200 | Opt_vers_4_1, | |
201 | Opt_vers_4_2, | |
9954bf92 DH |
202 | }; |
203 | ||
e38bb238 SM |
204 | static const struct constant_table nfs_vers_tokens[] = { |
205 | { "2", Opt_vers_2 }, | |
206 | { "3", Opt_vers_3 }, | |
207 | { "4", Opt_vers_4 }, | |
208 | { "4.0", Opt_vers_4_0 }, | |
209 | { "4.1", Opt_vers_4_1 }, | |
210 | { "4.2", Opt_vers_4_2 }, | |
529af905 | 211 | {} |
9954bf92 DH |
212 | }; |
213 | ||
214 | enum { | |
e38bb238 SM |
215 | Opt_xprt_rdma, |
216 | Opt_xprt_rdma6, | |
217 | Opt_xprt_tcp, | |
218 | Opt_xprt_tcp6, | |
219 | Opt_xprt_udp, | |
220 | Opt_xprt_udp6, | |
221 | nr__Opt_xprt | |
9954bf92 DH |
222 | }; |
223 | ||
529af905 | 224 | static const struct constant_table nfs_xprt_protocol_tokens[] = { |
e38bb238 SM |
225 | { "rdma", Opt_xprt_rdma }, |
226 | { "rdma6", Opt_xprt_rdma6 }, | |
227 | { "tcp", Opt_xprt_tcp }, | |
228 | { "tcp6", Opt_xprt_tcp6 }, | |
229 | { "udp", Opt_xprt_udp }, | |
230 | { "udp6", Opt_xprt_udp6 }, | |
529af905 | 231 | {} |
9954bf92 DH |
232 | }; |
233 | ||
234 | enum { | |
e38bb238 SM |
235 | Opt_sec_krb5, |
236 | Opt_sec_krb5i, | |
237 | Opt_sec_krb5p, | |
238 | Opt_sec_lkey, | |
239 | Opt_sec_lkeyi, | |
240 | Opt_sec_lkeyp, | |
241 | Opt_sec_none, | |
242 | Opt_sec_spkm, | |
243 | Opt_sec_spkmi, | |
244 | Opt_sec_spkmp, | |
245 | Opt_sec_sys, | |
246 | nr__Opt_sec | |
9954bf92 DH |
247 | }; |
248 | ||
e38bb238 SM |
249 | static const struct constant_table nfs_secflavor_tokens[] = { |
250 | { "krb5", Opt_sec_krb5 }, | |
251 | { "krb5i", Opt_sec_krb5i }, | |
252 | { "krb5p", Opt_sec_krb5p }, | |
253 | { "lkey", Opt_sec_lkey }, | |
254 | { "lkeyi", Opt_sec_lkeyi }, | |
255 | { "lkeyp", Opt_sec_lkeyp }, | |
256 | { "none", Opt_sec_none }, | |
257 | { "null", Opt_sec_none }, | |
258 | { "spkm3", Opt_sec_spkm }, | |
259 | { "spkm3i", Opt_sec_spkmi }, | |
260 | { "spkm3p", Opt_sec_spkmp }, | |
261 | { "sys", Opt_sec_sys }, | |
529af905 | 262 | {} |
9954bf92 DH |
263 | }; |
264 | ||
9954bf92 DH |
265 | /* |
266 | * Sanity-check a server address provided by the mount command. | |
267 | * | |
268 | * Address family must be initialized, and address must not be | |
269 | * the ANY address for that family. | |
270 | */ | |
271 | static int nfs_verify_server_address(struct sockaddr *addr) | |
272 | { | |
273 | switch (addr->sa_family) { | |
274 | case AF_INET: { | |
275 | struct sockaddr_in *sa = (struct sockaddr_in *)addr; | |
276 | return sa->sin_addr.s_addr != htonl(INADDR_ANY); | |
277 | } | |
278 | case AF_INET6: { | |
279 | struct in6_addr *sa = &((struct sockaddr_in6 *)addr)->sin6_addr; | |
280 | return !ipv6_addr_any(sa); | |
281 | } | |
282 | } | |
283 | ||
284 | dfprintk(MOUNT, "NFS: Invalid IP address specified\n"); | |
285 | return 0; | |
286 | } | |
287 | ||
90ff57bf TM |
288 | #ifdef CONFIG_NFS_DISABLE_UDP_SUPPORT |
289 | static bool nfs_server_transport_udp_invalid(const struct nfs_fs_context *ctx) | |
290 | { | |
291 | return true; | |
292 | } | |
293 | #else | |
294 | static bool nfs_server_transport_udp_invalid(const struct nfs_fs_context *ctx) | |
295 | { | |
296 | if (ctx->version == 4) | |
297 | return true; | |
298 | return false; | |
299 | } | |
300 | #endif | |
301 | ||
9954bf92 DH |
302 | /* |
303 | * Sanity check the NFS transport protocol. | |
9954bf92 | 304 | */ |
90ff57bf TM |
305 | static int nfs_validate_transport_protocol(struct fs_context *fc, |
306 | struct nfs_fs_context *ctx) | |
9954bf92 | 307 | { |
5eb005ca | 308 | switch (ctx->nfs_server.protocol) { |
9954bf92 | 309 | case XPRT_TRANSPORT_UDP: |
90ff57bf TM |
310 | if (nfs_server_transport_udp_invalid(ctx)) |
311 | goto out_invalid_transport_udp; | |
312 | break; | |
9954bf92 DH |
313 | case XPRT_TRANSPORT_TCP: |
314 | case XPRT_TRANSPORT_RDMA: | |
315 | break; | |
316 | default: | |
5eb005ca | 317 | ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; |
9954bf92 | 318 | } |
90ff57bf TM |
319 | return 0; |
320 | out_invalid_transport_udp: | |
321 | return nfs_invalf(fc, "NFS: Unsupported transport protocol udp"); | |
9954bf92 DH |
322 | } |
323 | ||
324 | /* | |
325 | * For text based NFSv2/v3 mounts, the mount protocol transport default | |
326 | * settings should depend upon the specified NFS transport. | |
327 | */ | |
5eb005ca | 328 | static void nfs_set_mount_transport_protocol(struct nfs_fs_context *ctx) |
9954bf92 | 329 | { |
5eb005ca DH |
330 | if (ctx->mount_server.protocol == XPRT_TRANSPORT_UDP || |
331 | ctx->mount_server.protocol == XPRT_TRANSPORT_TCP) | |
9954bf92 | 332 | return; |
5eb005ca | 333 | switch (ctx->nfs_server.protocol) { |
9954bf92 | 334 | case XPRT_TRANSPORT_UDP: |
5eb005ca | 335 | ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; |
9954bf92 DH |
336 | break; |
337 | case XPRT_TRANSPORT_TCP: | |
338 | case XPRT_TRANSPORT_RDMA: | |
5eb005ca | 339 | ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; |
9954bf92 DH |
340 | } |
341 | } | |
342 | ||
343 | /* | |
344 | * Add 'flavor' to 'auth_info' if not already present. | |
345 | * Returns true if 'flavor' ends up in the list, false otherwise | |
346 | */ | |
62a55d08 | 347 | static int nfs_auth_info_add(struct fs_context *fc, |
e558100f DH |
348 | struct nfs_auth_info *auth_info, |
349 | rpc_authflavor_t flavor) | |
9954bf92 DH |
350 | { |
351 | unsigned int i; | |
352 | unsigned int max_flavor_len = ARRAY_SIZE(auth_info->flavors); | |
353 | ||
354 | /* make sure this flavor isn't already in the list */ | |
355 | for (i = 0; i < auth_info->flavor_len; i++) { | |
356 | if (flavor == auth_info->flavors[i]) | |
e558100f | 357 | return 0; |
9954bf92 DH |
358 | } |
359 | ||
ce8866f0 SM |
360 | if (auth_info->flavor_len + 1 >= max_flavor_len) |
361 | return nfs_invalf(fc, "NFS: too many sec= flavors"); | |
9954bf92 DH |
362 | |
363 | auth_info->flavors[auth_info->flavor_len++] = flavor; | |
e558100f | 364 | return 0; |
9954bf92 DH |
365 | } |
366 | ||
367 | /* | |
368 | * Parse the value of the 'sec=' option. | |
369 | */ | |
62a55d08 | 370 | static int nfs_parse_security_flavors(struct fs_context *fc, |
e38bb238 | 371 | struct fs_parameter *param) |
9954bf92 | 372 | { |
62a55d08 | 373 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
9954bf92 | 374 | rpc_authflavor_t pseudoflavor; |
e38bb238 | 375 | char *string = param->string, *p; |
e558100f | 376 | int ret; |
9954bf92 | 377 | |
e38bb238 | 378 | dfprintk(MOUNT, "NFS: parsing %s=%s option\n", param->key, param->string); |
9954bf92 | 379 | |
e38bb238 SM |
380 | while ((p = strsep(&string, ":")) != NULL) { |
381 | if (!*p) | |
382 | continue; | |
383 | switch (lookup_constant(nfs_secflavor_tokens, p, -1)) { | |
9954bf92 DH |
384 | case Opt_sec_none: |
385 | pseudoflavor = RPC_AUTH_NULL; | |
386 | break; | |
387 | case Opt_sec_sys: | |
388 | pseudoflavor = RPC_AUTH_UNIX; | |
389 | break; | |
390 | case Opt_sec_krb5: | |
391 | pseudoflavor = RPC_AUTH_GSS_KRB5; | |
392 | break; | |
393 | case Opt_sec_krb5i: | |
394 | pseudoflavor = RPC_AUTH_GSS_KRB5I; | |
395 | break; | |
396 | case Opt_sec_krb5p: | |
397 | pseudoflavor = RPC_AUTH_GSS_KRB5P; | |
398 | break; | |
399 | case Opt_sec_lkey: | |
400 | pseudoflavor = RPC_AUTH_GSS_LKEY; | |
401 | break; | |
402 | case Opt_sec_lkeyi: | |
403 | pseudoflavor = RPC_AUTH_GSS_LKEYI; | |
404 | break; | |
405 | case Opt_sec_lkeyp: | |
406 | pseudoflavor = RPC_AUTH_GSS_LKEYP; | |
407 | break; | |
408 | case Opt_sec_spkm: | |
409 | pseudoflavor = RPC_AUTH_GSS_SPKM; | |
410 | break; | |
411 | case Opt_sec_spkmi: | |
412 | pseudoflavor = RPC_AUTH_GSS_SPKMI; | |
413 | break; | |
414 | case Opt_sec_spkmp: | |
415 | pseudoflavor = RPC_AUTH_GSS_SPKMP; | |
416 | break; | |
417 | default: | |
ce8866f0 | 418 | return nfs_invalf(fc, "NFS: sec=%s option not recognized", p); |
9954bf92 DH |
419 | } |
420 | ||
62a55d08 | 421 | ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor); |
e558100f DH |
422 | if (ret < 0) |
423 | return ret; | |
9954bf92 DH |
424 | } |
425 | ||
e558100f | 426 | return 0; |
9954bf92 DH |
427 | } |
428 | ||
62a55d08 | 429 | static int nfs_parse_version_string(struct fs_context *fc, |
e38bb238 | 430 | const char *string) |
9954bf92 | 431 | { |
62a55d08 SM |
432 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
433 | ||
5eb005ca | 434 | ctx->flags &= ~NFS_MOUNT_VER3; |
e38bb238 | 435 | switch (lookup_constant(nfs_vers_tokens, string, -1)) { |
9954bf92 | 436 | case Opt_vers_2: |
5eb005ca | 437 | ctx->version = 2; |
9954bf92 DH |
438 | break; |
439 | case Opt_vers_3: | |
5eb005ca DH |
440 | ctx->flags |= NFS_MOUNT_VER3; |
441 | ctx->version = 3; | |
9954bf92 DH |
442 | break; |
443 | case Opt_vers_4: | |
444 | /* Backward compatibility option. In future, | |
445 | * the mount program should always supply | |
446 | * a NFSv4 minor version number. | |
447 | */ | |
5eb005ca | 448 | ctx->version = 4; |
9954bf92 DH |
449 | break; |
450 | case Opt_vers_4_0: | |
5eb005ca DH |
451 | ctx->version = 4; |
452 | ctx->minorversion = 0; | |
9954bf92 DH |
453 | break; |
454 | case Opt_vers_4_1: | |
5eb005ca DH |
455 | ctx->version = 4; |
456 | ctx->minorversion = 1; | |
9954bf92 DH |
457 | break; |
458 | case Opt_vers_4_2: | |
5eb005ca DH |
459 | ctx->version = 4; |
460 | ctx->minorversion = 2; | |
9954bf92 DH |
461 | break; |
462 | default: | |
ce8866f0 | 463 | return nfs_invalf(fc, "NFS: Unsupported NFS version"); |
9954bf92 | 464 | } |
e558100f | 465 | return 0; |
9954bf92 DH |
466 | } |
467 | ||
9954bf92 | 468 | /* |
e38bb238 | 469 | * Parse a single mount parameter. |
9954bf92 | 470 | */ |
f2aedb71 | 471 | static int nfs_fs_context_parse_param(struct fs_context *fc, |
e38bb238 | 472 | struct fs_parameter *param) |
9954bf92 | 473 | { |
e38bb238 | 474 | struct fs_parse_result result; |
f2aedb71 | 475 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
e38bb238 SM |
476 | unsigned short protofamily, mountfamily; |
477 | unsigned int len; | |
478 | int ret, opt; | |
9954bf92 | 479 | |
e38bb238 | 480 | dfprintk(MOUNT, "NFS: parsing nfs mount option '%s'\n", param->key); |
9954bf92 | 481 | |
d7167b14 | 482 | opt = fs_parse(fc, nfs_fs_parameters, param, &result); |
e38bb238 SM |
483 | if (opt < 0) |
484 | return ctx->sloppy ? 1 : opt; | |
485 | ||
ec1ade6a OK |
486 | if (fc->security) |
487 | ctx->has_sec_mnt_opts = 1; | |
488 | ||
e38bb238 | 489 | switch (opt) { |
f2aedb71 | 490 | case Opt_source: |
ce8866f0 SM |
491 | if (fc->source) |
492 | return nfs_invalf(fc, "NFS: Multiple sources not supported"); | |
f2aedb71 DH |
493 | fc->source = param->string; |
494 | param->string = NULL; | |
495 | break; | |
496 | ||
9954bf92 DH |
497 | /* |
498 | * boolean options: foo/nofoo | |
499 | */ | |
cbd071b5 DH |
500 | case Opt_soft: |
501 | ctx->flags |= NFS_MOUNT_SOFT; | |
502 | ctx->flags &= ~NFS_MOUNT_SOFTERR; | |
503 | break; | |
504 | case Opt_softerr: | |
c74dfe97 | 505 | ctx->flags |= NFS_MOUNT_SOFTERR | NFS_MOUNT_SOFTREVAL; |
cbd071b5 DH |
506 | ctx->flags &= ~NFS_MOUNT_SOFT; |
507 | break; | |
508 | case Opt_hard: | |
c74dfe97 TM |
509 | ctx->flags &= ~(NFS_MOUNT_SOFT | |
510 | NFS_MOUNT_SOFTERR | | |
511 | NFS_MOUNT_SOFTREVAL); | |
512 | break; | |
513 | case Opt_softreval: | |
514 | if (result.negated) | |
515 | ctx->flags &= ~NFS_MOUNT_SOFTREVAL; | |
516 | else | |
517 | ctx->flags &= NFS_MOUNT_SOFTREVAL; | |
cbd071b5 DH |
518 | break; |
519 | case Opt_posix: | |
e38bb238 SM |
520 | if (result.negated) |
521 | ctx->flags &= ~NFS_MOUNT_POSIX; | |
522 | else | |
523 | ctx->flags |= NFS_MOUNT_POSIX; | |
cbd071b5 DH |
524 | break; |
525 | case Opt_cto: | |
e38bb238 SM |
526 | if (result.negated) |
527 | ctx->flags |= NFS_MOUNT_NOCTO; | |
528 | else | |
529 | ctx->flags &= ~NFS_MOUNT_NOCTO; | |
cbd071b5 DH |
530 | break; |
531 | case Opt_ac: | |
e38bb238 SM |
532 | if (result.negated) |
533 | ctx->flags |= NFS_MOUNT_NOAC; | |
534 | else | |
535 | ctx->flags &= ~NFS_MOUNT_NOAC; | |
cbd071b5 DH |
536 | break; |
537 | case Opt_lock: | |
e38bb238 SM |
538 | if (result.negated) { |
539 | ctx->flags |= NFS_MOUNT_NONLM; | |
540 | ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); | |
541 | } else { | |
542 | ctx->flags &= ~NFS_MOUNT_NONLM; | |
543 | ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); | |
544 | } | |
cbd071b5 DH |
545 | break; |
546 | case Opt_udp: | |
547 | ctx->flags &= ~NFS_MOUNT_TCP; | |
548 | ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; | |
549 | break; | |
550 | case Opt_tcp: | |
cbd071b5 DH |
551 | case Opt_rdma: |
552 | ctx->flags |= NFS_MOUNT_TCP; /* for side protocols */ | |
1c3695d0 TM |
553 | ret = xprt_find_transport_ident(param->key); |
554 | if (ret < 0) | |
555 | goto out_bad_transport; | |
556 | ctx->nfs_server.protocol = ret; | |
cbd071b5 DH |
557 | break; |
558 | case Opt_acl: | |
e38bb238 SM |
559 | if (result.negated) |
560 | ctx->flags |= NFS_MOUNT_NOACL; | |
561 | else | |
562 | ctx->flags &= ~NFS_MOUNT_NOACL; | |
cbd071b5 DH |
563 | break; |
564 | case Opt_rdirplus: | |
e38bb238 SM |
565 | if (result.negated) |
566 | ctx->flags |= NFS_MOUNT_NORDIRPLUS; | |
567 | else | |
568 | ctx->flags &= ~NFS_MOUNT_NORDIRPLUS; | |
cbd071b5 DH |
569 | break; |
570 | case Opt_sharecache: | |
e38bb238 SM |
571 | if (result.negated) |
572 | ctx->flags |= NFS_MOUNT_UNSHARED; | |
573 | else | |
574 | ctx->flags &= ~NFS_MOUNT_UNSHARED; | |
cbd071b5 DH |
575 | break; |
576 | case Opt_resvport: | |
e38bb238 SM |
577 | if (result.negated) |
578 | ctx->flags |= NFS_MOUNT_NORESVPORT; | |
579 | else | |
580 | ctx->flags &= ~NFS_MOUNT_NORESVPORT; | |
cbd071b5 | 581 | break; |
48ce73b1 | 582 | case Opt_fscache_flag: |
e38bb238 SM |
583 | if (result.negated) |
584 | ctx->options &= ~NFS_OPTION_FSCACHE; | |
585 | else | |
586 | ctx->options |= NFS_OPTION_FSCACHE; | |
48ce73b1 AV |
587 | kfree(ctx->fscache_uniq); |
588 | ctx->fscache_uniq = NULL; | |
589 | break; | |
590 | case Opt_fscache: | |
591 | ctx->options |= NFS_OPTION_FSCACHE; | |
592 | kfree(ctx->fscache_uniq); | |
593 | ctx->fscache_uniq = param->string; | |
594 | param->string = NULL; | |
cbd071b5 DH |
595 | break; |
596 | case Opt_migration: | |
e38bb238 SM |
597 | if (result.negated) |
598 | ctx->options &= ~NFS_OPTION_MIGRATION; | |
599 | else | |
600 | ctx->options |= NFS_OPTION_MIGRATION; | |
cbd071b5 | 601 | break; |
9954bf92 DH |
602 | |
603 | /* | |
604 | * options that take numeric values | |
605 | */ | |
cbd071b5 | 606 | case Opt_port: |
e38bb238 SM |
607 | if (result.uint_32 > USHRT_MAX) |
608 | goto out_of_bounds; | |
609 | ctx->nfs_server.port = result.uint_32; | |
cbd071b5 DH |
610 | break; |
611 | case Opt_rsize: | |
e38bb238 | 612 | ctx->rsize = result.uint_32; |
cbd071b5 DH |
613 | break; |
614 | case Opt_wsize: | |
e38bb238 | 615 | ctx->wsize = result.uint_32; |
cbd071b5 DH |
616 | break; |
617 | case Opt_bsize: | |
e38bb238 | 618 | ctx->bsize = result.uint_32; |
cbd071b5 DH |
619 | break; |
620 | case Opt_timeo: | |
e38bb238 SM |
621 | if (result.uint_32 < 1 || result.uint_32 > INT_MAX) |
622 | goto out_of_bounds; | |
623 | ctx->timeo = result.uint_32; | |
cbd071b5 DH |
624 | break; |
625 | case Opt_retrans: | |
e38bb238 SM |
626 | if (result.uint_32 > INT_MAX) |
627 | goto out_of_bounds; | |
628 | ctx->retrans = result.uint_32; | |
cbd071b5 DH |
629 | break; |
630 | case Opt_acregmin: | |
e38bb238 | 631 | ctx->acregmin = result.uint_32; |
cbd071b5 DH |
632 | break; |
633 | case Opt_acregmax: | |
e38bb238 | 634 | ctx->acregmax = result.uint_32; |
cbd071b5 DH |
635 | break; |
636 | case Opt_acdirmin: | |
e38bb238 | 637 | ctx->acdirmin = result.uint_32; |
cbd071b5 DH |
638 | break; |
639 | case Opt_acdirmax: | |
e38bb238 | 640 | ctx->acdirmax = result.uint_32; |
cbd071b5 DH |
641 | break; |
642 | case Opt_actimeo: | |
e38bb238 SM |
643 | ctx->acregmin = result.uint_32; |
644 | ctx->acregmax = result.uint_32; | |
645 | ctx->acdirmin = result.uint_32; | |
646 | ctx->acdirmax = result.uint_32; | |
cbd071b5 DH |
647 | break; |
648 | case Opt_namelen: | |
e38bb238 | 649 | ctx->namlen = result.uint_32; |
cbd071b5 DH |
650 | break; |
651 | case Opt_mountport: | |
e38bb238 SM |
652 | if (result.uint_32 > USHRT_MAX) |
653 | goto out_of_bounds; | |
654 | ctx->mount_server.port = result.uint_32; | |
cbd071b5 DH |
655 | break; |
656 | case Opt_mountvers: | |
e38bb238 SM |
657 | if (result.uint_32 < NFS_MNT_VERSION || |
658 | result.uint_32 > NFS_MNT3_VERSION) | |
659 | goto out_of_bounds; | |
660 | ctx->mount_server.version = result.uint_32; | |
cbd071b5 DH |
661 | break; |
662 | case Opt_minorversion: | |
e38bb238 SM |
663 | if (result.uint_32 > NFS4_MAX_MINOR_VERSION) |
664 | goto out_of_bounds; | |
665 | ctx->minorversion = result.uint_32; | |
cbd071b5 | 666 | break; |
9954bf92 DH |
667 | |
668 | /* | |
669 | * options that take text values | |
670 | */ | |
e38bb238 | 671 | case Opt_v: |
62a55d08 | 672 | ret = nfs_parse_version_string(fc, param->key + 1); |
e38bb238 SM |
673 | if (ret < 0) |
674 | return ret; | |
675 | break; | |
676 | case Opt_vers: | |
62a55d08 | 677 | ret = nfs_parse_version_string(fc, param->string); |
e558100f DH |
678 | if (ret < 0) |
679 | return ret; | |
cbd071b5 DH |
680 | break; |
681 | case Opt_sec: | |
62a55d08 | 682 | ret = nfs_parse_security_flavors(fc, param); |
e558100f DH |
683 | if (ret < 0) |
684 | return ret; | |
cbd071b5 | 685 | break; |
cbd071b5 | 686 | |
e38bb238 SM |
687 | case Opt_proto: |
688 | protofamily = AF_INET; | |
689 | switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) { | |
cbd071b5 | 690 | case Opt_xprt_udp6: |
e38bb238 | 691 | protofamily = AF_INET6; |
df561f66 | 692 | fallthrough; |
cbd071b5 DH |
693 | case Opt_xprt_udp: |
694 | ctx->flags &= ~NFS_MOUNT_TCP; | |
695 | ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; | |
9954bf92 | 696 | break; |
cbd071b5 | 697 | case Opt_xprt_tcp6: |
e38bb238 | 698 | protofamily = AF_INET6; |
df561f66 | 699 | fallthrough; |
cbd071b5 DH |
700 | case Opt_xprt_tcp: |
701 | ctx->flags |= NFS_MOUNT_TCP; | |
702 | ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
9954bf92 | 703 | break; |
cbd071b5 | 704 | case Opt_xprt_rdma6: |
e38bb238 | 705 | protofamily = AF_INET6; |
df561f66 | 706 | fallthrough; |
cbd071b5 DH |
707 | case Opt_xprt_rdma: |
708 | /* vector side protocols to TCP */ | |
709 | ctx->flags |= NFS_MOUNT_TCP; | |
1c3695d0 TM |
710 | ret = xprt_find_transport_ident(param->string); |
711 | if (ret < 0) | |
712 | goto out_bad_transport; | |
713 | ctx->nfs_server.protocol = ret; | |
9954bf92 | 714 | break; |
cbd071b5 | 715 | default: |
1c3695d0 | 716 | goto out_bad_transport; |
cbd071b5 | 717 | } |
e38bb238 SM |
718 | |
719 | ctx->protofamily = protofamily; | |
cbd071b5 | 720 | break; |
e38bb238 | 721 | |
cbd071b5 | 722 | case Opt_mountproto: |
e38bb238 SM |
723 | mountfamily = AF_INET; |
724 | switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) { | |
cbd071b5 | 725 | case Opt_xprt_udp6: |
e38bb238 | 726 | mountfamily = AF_INET6; |
df561f66 | 727 | fallthrough; |
cbd071b5 DH |
728 | case Opt_xprt_udp: |
729 | ctx->mount_server.protocol = XPRT_TRANSPORT_UDP; | |
730 | break; | |
731 | case Opt_xprt_tcp6: | |
e38bb238 | 732 | mountfamily = AF_INET6; |
df561f66 | 733 | fallthrough; |
cbd071b5 DH |
734 | case Opt_xprt_tcp: |
735 | ctx->mount_server.protocol = XPRT_TRANSPORT_TCP; | |
736 | break; | |
737 | case Opt_xprt_rdma: /* not used for side protocols */ | |
738 | default: | |
1c3695d0 | 739 | goto out_bad_transport; |
cbd071b5 | 740 | } |
e38bb238 | 741 | ctx->mountfamily = mountfamily; |
cbd071b5 | 742 | break; |
e38bb238 | 743 | |
cbd071b5 | 744 | case Opt_addr: |
62a55d08 | 745 | len = rpc_pton(fc->net_ns, param->string, param->size, |
e38bb238 SM |
746 | &ctx->nfs_server.address, |
747 | sizeof(ctx->nfs_server._address)); | |
748 | if (len == 0) | |
cbd071b5 | 749 | goto out_invalid_address; |
e38bb238 | 750 | ctx->nfs_server.addrlen = len; |
cbd071b5 DH |
751 | break; |
752 | case Opt_clientaddr: | |
e38bb238 SM |
753 | kfree(ctx->client_address); |
754 | ctx->client_address = param->string; | |
755 | param->string = NULL; | |
cbd071b5 DH |
756 | break; |
757 | case Opt_mounthost: | |
e38bb238 SM |
758 | kfree(ctx->mount_server.hostname); |
759 | ctx->mount_server.hostname = param->string; | |
760 | param->string = NULL; | |
cbd071b5 DH |
761 | break; |
762 | case Opt_mountaddr: | |
62a55d08 | 763 | len = rpc_pton(fc->net_ns, param->string, param->size, |
e38bb238 SM |
764 | &ctx->mount_server.address, |
765 | sizeof(ctx->mount_server._address)); | |
766 | if (len == 0) | |
cbd071b5 | 767 | goto out_invalid_address; |
e38bb238 | 768 | ctx->mount_server.addrlen = len; |
cbd071b5 DH |
769 | break; |
770 | case Opt_nconnect: | |
e38bb238 SM |
771 | if (result.uint_32 < 1 || result.uint_32 > NFS_MAX_CONNECTIONS) |
772 | goto out_of_bounds; | |
773 | ctx->nfs_server.nconnect = result.uint_32; | |
cbd071b5 | 774 | break; |
7e134205 OK |
775 | case Opt_max_connect: |
776 | if (result.uint_32 < 1 || result.uint_32 > NFS_MAX_TRANSPORTS) | |
777 | goto out_of_bounds; | |
778 | ctx->nfs_server.max_connect = result.uint_32; | |
779 | break; | |
cbd071b5 | 780 | case Opt_lookupcache: |
e38bb238 | 781 | switch (result.uint_32) { |
cbd071b5 DH |
782 | case Opt_lookupcache_all: |
783 | ctx->flags &= ~(NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE); | |
9954bf92 | 784 | break; |
cbd071b5 DH |
785 | case Opt_lookupcache_positive: |
786 | ctx->flags &= ~NFS_MOUNT_LOOKUP_CACHE_NONE; | |
787 | ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG; | |
9954bf92 | 788 | break; |
cbd071b5 DH |
789 | case Opt_lookupcache_none: |
790 | ctx->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE; | |
9954bf92 | 791 | break; |
cbd071b5 | 792 | default: |
e38bb238 | 793 | goto out_invalid_value; |
cbd071b5 DH |
794 | } |
795 | break; | |
cbd071b5 | 796 | case Opt_local_lock: |
e38bb238 | 797 | switch (result.uint_32) { |
cbd071b5 DH |
798 | case Opt_local_lock_all: |
799 | ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK | | |
800 | NFS_MOUNT_LOCAL_FCNTL); | |
9954bf92 | 801 | break; |
cbd071b5 DH |
802 | case Opt_local_lock_flock: |
803 | ctx->flags |= NFS_MOUNT_LOCAL_FLOCK; | |
9954bf92 | 804 | break; |
cbd071b5 DH |
805 | case Opt_local_lock_posix: |
806 | ctx->flags |= NFS_MOUNT_LOCAL_FCNTL; | |
9954bf92 | 807 | break; |
cbd071b5 DH |
808 | case Opt_local_lock_none: |
809 | ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK | | |
810 | NFS_MOUNT_LOCAL_FCNTL); | |
9954bf92 | 811 | break; |
cbd071b5 | 812 | default: |
e38bb238 | 813 | goto out_invalid_value; |
cbd071b5 DH |
814 | } |
815 | break; | |
a0492339 TM |
816 | case Opt_write: |
817 | switch (result.uint_32) { | |
818 | case Opt_write_lazy: | |
819 | ctx->flags &= | |
820 | ~(NFS_MOUNT_WRITE_EAGER | NFS_MOUNT_WRITE_WAIT); | |
821 | break; | |
822 | case Opt_write_eager: | |
823 | ctx->flags |= NFS_MOUNT_WRITE_EAGER; | |
824 | ctx->flags &= ~NFS_MOUNT_WRITE_WAIT; | |
825 | break; | |
826 | case Opt_write_wait: | |
827 | ctx->flags |= | |
828 | NFS_MOUNT_WRITE_EAGER | NFS_MOUNT_WRITE_WAIT; | |
829 | break; | |
830 | default: | |
831 | goto out_invalid_value; | |
832 | } | |
833 | break; | |
9954bf92 DH |
834 | |
835 | /* | |
836 | * Special options | |
837 | */ | |
cbd071b5 | 838 | case Opt_sloppy: |
e38bb238 | 839 | ctx->sloppy = true; |
cbd071b5 DH |
840 | dfprintk(MOUNT, "NFS: relaxing parsing rules\n"); |
841 | break; | |
9954bf92 DH |
842 | } |
843 | ||
f8ee01e3 DH |
844 | return 0; |
845 | ||
f8ee01e3 | 846 | out_invalid_value: |
ce8866f0 | 847 | return nfs_invalf(fc, "NFS: Bad mount option value specified"); |
e38bb238 | 848 | out_invalid_address: |
ce8866f0 | 849 | return nfs_invalf(fc, "NFS: Bad IP address specified"); |
e38bb238 | 850 | out_of_bounds: |
3a21409a | 851 | return nfs_invalf(fc, "NFS: Value for '%s' out of range", param->key); |
1c3695d0 TM |
852 | out_bad_transport: |
853 | return nfs_invalf(fc, "NFS: Unrecognized transport protocol"); | |
e38bb238 SM |
854 | } |
855 | ||
9954bf92 | 856 | /* |
62a55d08 | 857 | * Split fc->source into "hostname:export_path". |
9954bf92 DH |
858 | * |
859 | * The leftmost colon demarks the split between the server's hostname | |
860 | * and the export path. If the hostname starts with a left square | |
861 | * bracket, then it may contain colons. | |
862 | * | |
863 | * Note: caller frees hostname and export path, even on error. | |
864 | */ | |
62a55d08 SM |
865 | static int nfs_parse_source(struct fs_context *fc, |
866 | size_t maxnamlen, size_t maxpathlen) | |
9954bf92 | 867 | { |
62a55d08 SM |
868 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
869 | const char *dev_name = fc->source; | |
9954bf92 | 870 | size_t len; |
62a55d08 | 871 | const char *end; |
9954bf92 DH |
872 | |
873 | if (unlikely(!dev_name || !*dev_name)) { | |
874 | dfprintk(MOUNT, "NFS: device name not specified\n"); | |
875 | return -EINVAL; | |
876 | } | |
877 | ||
878 | /* Is the host name protected with square brakcets? */ | |
879 | if (*dev_name == '[') { | |
880 | end = strchr(++dev_name, ']'); | |
881 | if (end == NULL || end[1] != ':') | |
882 | goto out_bad_devname; | |
883 | ||
884 | len = end - dev_name; | |
885 | end++; | |
886 | } else { | |
62a55d08 | 887 | const char *comma; |
9954bf92 DH |
888 | |
889 | end = strchr(dev_name, ':'); | |
890 | if (end == NULL) | |
891 | goto out_bad_devname; | |
892 | len = end - dev_name; | |
893 | ||
894 | /* kill possible hostname list: not supported */ | |
62a55d08 SM |
895 | comma = memchr(dev_name, ',', len); |
896 | if (comma) | |
9954bf92 DH |
897 | len = comma - dev_name; |
898 | } | |
899 | ||
900 | if (len > maxnamlen) | |
901 | goto out_hostname; | |
902 | ||
75a9b917 SM |
903 | kfree(ctx->nfs_server.hostname); |
904 | ||
9954bf92 | 905 | /* N.B. caller will free nfs_server.hostname in all cases */ |
e558100f DH |
906 | ctx->nfs_server.hostname = kmemdup_nul(dev_name, len, GFP_KERNEL); |
907 | if (!ctx->nfs_server.hostname) | |
9954bf92 DH |
908 | goto out_nomem; |
909 | len = strlen(++end); | |
910 | if (len > maxpathlen) | |
911 | goto out_path; | |
e558100f DH |
912 | ctx->nfs_server.export_path = kmemdup_nul(end, len, GFP_KERNEL); |
913 | if (!ctx->nfs_server.export_path) | |
9954bf92 DH |
914 | goto out_nomem; |
915 | ||
e558100f | 916 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", ctx->nfs_server.export_path); |
9954bf92 DH |
917 | return 0; |
918 | ||
919 | out_bad_devname: | |
ce8866f0 | 920 | return nfs_invalf(fc, "NFS: device name not in host:path format"); |
9954bf92 | 921 | out_nomem: |
ce8866f0 | 922 | nfs_errorf(fc, "NFS: not enough memory to parse device name"); |
9954bf92 | 923 | return -ENOMEM; |
9954bf92 | 924 | out_hostname: |
ce8866f0 | 925 | nfs_errorf(fc, "NFS: server hostname too long"); |
9954bf92 | 926 | return -ENAMETOOLONG; |
9954bf92 | 927 | out_path: |
ce8866f0 | 928 | nfs_errorf(fc, "NFS: export pathname too long"); |
9954bf92 DH |
929 | return -ENAMETOOLONG; |
930 | } | |
931 | ||
f2aedb71 DH |
932 | static inline bool is_remount_fc(struct fs_context *fc) |
933 | { | |
934 | return fc->root != NULL; | |
935 | } | |
936 | ||
9954bf92 | 937 | /* |
e558100f | 938 | * Parse monolithic NFS2/NFS3 mount data |
9954bf92 DH |
939 | * - fills in the mount root filehandle |
940 | * | |
941 | * For option strings, user space handles the following behaviors: | |
942 | * | |
943 | * + DNS: mapping server host name to IP address ("addr=" option) | |
944 | * | |
945 | * + failure mode: how to behave if a mount request can't be handled | |
946 | * immediately ("fg/bg" option) | |
947 | * | |
948 | * + retry: how often to retry a mount request ("retry=" option) | |
949 | * | |
950 | * + breaking back: trying proto=udp after proto=tcp, v2 after v3, | |
951 | * mountproto=tcp after mountproto=udp, and so on | |
952 | */ | |
f2aedb71 DH |
953 | static int nfs23_parse_monolithic(struct fs_context *fc, |
954 | struct nfs_mount_data *data) | |
9954bf92 | 955 | { |
f2aedb71 | 956 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
62a55d08 | 957 | struct nfs_fh *mntfh = ctx->mntfh; |
5eb005ca | 958 | struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; |
9954bf92 | 959 | int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; |
90ff57bf | 960 | int ret; |
9954bf92 DH |
961 | |
962 | if (data == NULL) | |
963 | goto out_no_data; | |
964 | ||
5eb005ca | 965 | ctx->version = NFS_DEFAULT_VERSION; |
9954bf92 DH |
966 | switch (data->version) { |
967 | case 1: | |
df561f66 GS |
968 | data->namlen = 0; |
969 | fallthrough; | |
9954bf92 | 970 | case 2: |
df561f66 GS |
971 | data->bsize = 0; |
972 | fallthrough; | |
9954bf92 DH |
973 | case 3: |
974 | if (data->flags & NFS_MOUNT_VER3) | |
975 | goto out_no_v3; | |
976 | data->root.size = NFS2_FHSIZE; | |
977 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
978 | /* Turn off security negotiation */ | |
979 | extra_flags |= NFS_MOUNT_SECFLAVOUR; | |
df561f66 | 980 | fallthrough; |
9954bf92 DH |
981 | case 4: |
982 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
983 | goto out_no_sec; | |
df561f66 | 984 | fallthrough; |
9954bf92 DH |
985 | case 5: |
986 | memset(data->context, 0, sizeof(data->context)); | |
df561f66 | 987 | fallthrough; |
9954bf92 DH |
988 | case 6: |
989 | if (data->flags & NFS_MOUNT_VER3) { | |
990 | if (data->root.size > NFS3_FHSIZE || data->root.size == 0) | |
991 | goto out_invalid_fh; | |
992 | mntfh->size = data->root.size; | |
5eb005ca | 993 | ctx->version = 3; |
9954bf92 DH |
994 | } else { |
995 | mntfh->size = NFS2_FHSIZE; | |
5eb005ca | 996 | ctx->version = 2; |
9954bf92 DH |
997 | } |
998 | ||
999 | ||
1000 | memcpy(mntfh->data, data->root.data, mntfh->size); | |
1001 | if (mntfh->size < sizeof(mntfh->data)) | |
1002 | memset(mntfh->data + mntfh->size, 0, | |
1003 | sizeof(mntfh->data) - mntfh->size); | |
1004 | ||
c09f11ef RD |
1005 | /* |
1006 | * for proto == XPRT_TRANSPORT_UDP, which is what uses | |
1007 | * to_exponential, implying shift: limit the shift value | |
1008 | * to BITS_PER_LONG (majortimeo is unsigned long) | |
1009 | */ | |
1010 | if (!(data->flags & NFS_MOUNT_TCP)) /* this will be UDP */ | |
1011 | if (data->retrans >= 64) /* shift value is too large */ | |
1012 | goto out_invalid_data; | |
1013 | ||
9954bf92 | 1014 | /* |
5eb005ca | 1015 | * Translate to nfs_fs_context, which nfs_fill_super |
9954bf92 DH |
1016 | * can deal with. |
1017 | */ | |
5eb005ca DH |
1018 | ctx->flags = data->flags & NFS_MOUNT_FLAGMASK; |
1019 | ctx->flags |= extra_flags; | |
1020 | ctx->rsize = data->rsize; | |
1021 | ctx->wsize = data->wsize; | |
1022 | ctx->timeo = data->timeo; | |
1023 | ctx->retrans = data->retrans; | |
1024 | ctx->acregmin = data->acregmin; | |
1025 | ctx->acregmax = data->acregmax; | |
1026 | ctx->acdirmin = data->acdirmin; | |
1027 | ctx->acdirmax = data->acdirmax; | |
1028 | ctx->need_mount = false; | |
9954bf92 DH |
1029 | |
1030 | memcpy(sap, &data->addr, sizeof(data->addr)); | |
5eb005ca DH |
1031 | ctx->nfs_server.addrlen = sizeof(data->addr); |
1032 | ctx->nfs_server.port = ntohs(data->addr.sin_port); | |
9954bf92 DH |
1033 | if (sap->sa_family != AF_INET || |
1034 | !nfs_verify_server_address(sap)) | |
1035 | goto out_no_address; | |
1036 | ||
1037 | if (!(data->flags & NFS_MOUNT_TCP)) | |
5eb005ca | 1038 | ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP; |
9954bf92 | 1039 | /* N.B. caller will free nfs_server.hostname in all cases */ |
5eb005ca | 1040 | ctx->nfs_server.hostname = kstrdup(data->hostname, GFP_KERNEL); |
f2aedb71 DH |
1041 | if (!ctx->nfs_server.hostname) |
1042 | goto out_nomem; | |
1043 | ||
5eb005ca DH |
1044 | ctx->namlen = data->namlen; |
1045 | ctx->bsize = data->bsize; | |
9954bf92 DH |
1046 | |
1047 | if (data->flags & NFS_MOUNT_SECFLAVOUR) | |
5eb005ca | 1048 | ctx->selected_flavor = data->pseudoflavor; |
9954bf92 | 1049 | else |
5eb005ca | 1050 | ctx->selected_flavor = RPC_AUTH_UNIX; |
9954bf92 DH |
1051 | |
1052 | if (!(data->flags & NFS_MOUNT_NONLM)) | |
5eb005ca | 1053 | ctx->flags &= ~(NFS_MOUNT_LOCAL_FLOCK| |
9954bf92 DH |
1054 | NFS_MOUNT_LOCAL_FCNTL); |
1055 | else | |
5eb005ca | 1056 | ctx->flags |= (NFS_MOUNT_LOCAL_FLOCK| |
9954bf92 | 1057 | NFS_MOUNT_LOCAL_FCNTL); |
62a55d08 | 1058 | |
9954bf92 DH |
1059 | /* |
1060 | * The legacy version 6 binary mount data from userspace has a | |
1061 | * field used only to transport selinux information into the | |
a5032910 | 1062 | * kernel. To continue to support that functionality we |
9954bf92 DH |
1063 | * have a touch of selinux knowledge here in the NFS code. The |
1064 | * userspace code converted context=blah to just blah so we are | |
1065 | * converting back to the full string selinux understands. | |
1066 | */ | |
1067 | if (data->context[0]){ | |
1068 | #ifdef CONFIG_SECURITY_SELINUX | |
f2aedb71 DH |
1069 | int ret; |
1070 | ||
9954bf92 | 1071 | data->context[NFS_MAX_CONTEXT_LEN] = '\0'; |
f2aedb71 DH |
1072 | ret = vfs_parse_fs_string(fc, "context", |
1073 | data->context, strlen(data->context)); | |
1074 | if (ret < 0) | |
1075 | return ret; | |
9954bf92 DH |
1076 | #else |
1077 | return -EINVAL; | |
1078 | #endif | |
1079 | } | |
1080 | ||
1081 | break; | |
1082 | default: | |
f2aedb71 | 1083 | goto generic; |
9954bf92 DH |
1084 | } |
1085 | ||
90ff57bf TM |
1086 | ret = nfs_validate_transport_protocol(fc, ctx); |
1087 | if (ret) | |
1088 | return ret; | |
1089 | ||
f2aedb71 | 1090 | ctx->skip_reconfig_option_check = true; |
9954bf92 DH |
1091 | return 0; |
1092 | ||
f2aedb71 DH |
1093 | generic: |
1094 | return generic_parse_monolithic(fc, data); | |
1095 | ||
9954bf92 | 1096 | out_no_data: |
f2aedb71 DH |
1097 | if (is_remount_fc(fc)) { |
1098 | ctx->skip_reconfig_option_check = true; | |
1099 | return 0; | |
1100 | } | |
ce8866f0 | 1101 | return nfs_invalf(fc, "NFS: mount program didn't pass any mount data"); |
9954bf92 DH |
1102 | |
1103 | out_no_v3: | |
ce8866f0 | 1104 | return nfs_invalf(fc, "NFS: nfs_mount_data version does not support v3"); |
9954bf92 DH |
1105 | |
1106 | out_no_sec: | |
ce8866f0 | 1107 | return nfs_invalf(fc, "NFS: nfs_mount_data version supports only AUTH_SYS"); |
9954bf92 DH |
1108 | |
1109 | out_nomem: | |
ce8866f0 | 1110 | dfprintk(MOUNT, "NFS: not enough memory to handle mount options"); |
9954bf92 DH |
1111 | return -ENOMEM; |
1112 | ||
1113 | out_no_address: | |
ce8866f0 | 1114 | return nfs_invalf(fc, "NFS: mount program didn't pass remote address"); |
9954bf92 DH |
1115 | |
1116 | out_invalid_fh: | |
ce8866f0 | 1117 | return nfs_invalf(fc, "NFS: invalid root filehandle"); |
c09f11ef RD |
1118 | |
1119 | out_invalid_data: | |
1120 | return nfs_invalf(fc, "NFS: invalid binary mount data"); | |
9954bf92 DH |
1121 | } |
1122 | ||
1123 | #if IS_ENABLED(CONFIG_NFS_V4) | |
67e306c6 CH |
1124 | struct compat_nfs_string { |
1125 | compat_uint_t len; | |
1126 | compat_uptr_t data; | |
1127 | }; | |
1128 | ||
1129 | static inline void compat_nfs_string(struct nfs_string *dst, | |
1130 | struct compat_nfs_string *src) | |
1131 | { | |
1132 | dst->data = compat_ptr(src->data); | |
1133 | dst->len = src->len; | |
1134 | } | |
1135 | ||
1136 | struct compat_nfs4_mount_data_v1 { | |
1137 | compat_int_t version; | |
1138 | compat_int_t flags; | |
1139 | compat_int_t rsize; | |
1140 | compat_int_t wsize; | |
1141 | compat_int_t timeo; | |
1142 | compat_int_t retrans; | |
1143 | compat_int_t acregmin; | |
1144 | compat_int_t acregmax; | |
1145 | compat_int_t acdirmin; | |
1146 | compat_int_t acdirmax; | |
1147 | struct compat_nfs_string client_addr; | |
1148 | struct compat_nfs_string mnt_path; | |
1149 | struct compat_nfs_string hostname; | |
1150 | compat_uint_t host_addrlen; | |
1151 | compat_uptr_t host_addr; | |
1152 | compat_int_t proto; | |
1153 | compat_int_t auth_flavourlen; | |
1154 | compat_uptr_t auth_flavours; | |
1155 | }; | |
1156 | ||
1157 | static void nfs4_compat_mount_data_conv(struct nfs4_mount_data *data) | |
1158 | { | |
1159 | struct compat_nfs4_mount_data_v1 *compat = | |
1160 | (struct compat_nfs4_mount_data_v1 *)data; | |
1161 | ||
1162 | /* copy the fields backwards */ | |
1163 | data->auth_flavours = compat_ptr(compat->auth_flavours); | |
1164 | data->auth_flavourlen = compat->auth_flavourlen; | |
1165 | data->proto = compat->proto; | |
1166 | data->host_addr = compat_ptr(compat->host_addr); | |
1167 | data->host_addrlen = compat->host_addrlen; | |
1168 | compat_nfs_string(&data->hostname, &compat->hostname); | |
1169 | compat_nfs_string(&data->mnt_path, &compat->mnt_path); | |
1170 | compat_nfs_string(&data->client_addr, &compat->client_addr); | |
1171 | data->acdirmax = compat->acdirmax; | |
1172 | data->acdirmin = compat->acdirmin; | |
1173 | data->acregmax = compat->acregmax; | |
1174 | data->acregmin = compat->acregmin; | |
1175 | data->retrans = compat->retrans; | |
1176 | data->timeo = compat->timeo; | |
1177 | data->wsize = compat->wsize; | |
1178 | data->rsize = compat->rsize; | |
1179 | data->flags = compat->flags; | |
1180 | data->version = compat->version; | |
1181 | } | |
1182 | ||
9954bf92 DH |
1183 | /* |
1184 | * Validate NFSv4 mount options | |
1185 | */ | |
f2aedb71 DH |
1186 | static int nfs4_parse_monolithic(struct fs_context *fc, |
1187 | struct nfs4_mount_data *data) | |
9954bf92 | 1188 | { |
f2aedb71 | 1189 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
5eb005ca | 1190 | struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; |
90ff57bf | 1191 | int ret; |
9954bf92 DH |
1192 | char *c; |
1193 | ||
a1c7dc5d CH |
1194 | if (!data) { |
1195 | if (is_remount_fc(fc)) | |
1196 | goto done; | |
1197 | return nfs_invalf(fc, | |
1198 | "NFS4: mount program didn't pass any mount data"); | |
1199 | } | |
9954bf92 | 1200 | |
5eb005ca | 1201 | ctx->version = 4; |
9954bf92 | 1202 | |
a1c7dc5d CH |
1203 | if (data->version != 1) |
1204 | return generic_parse_monolithic(fc, data); | |
1205 | ||
67e306c6 CH |
1206 | if (in_compat_syscall()) |
1207 | nfs4_compat_mount_data_conv(data); | |
1208 | ||
a1c7dc5d CH |
1209 | if (data->host_addrlen > sizeof(ctx->nfs_server.address)) |
1210 | goto out_no_address; | |
1211 | if (data->host_addrlen == 0) | |
1212 | goto out_no_address; | |
1213 | ctx->nfs_server.addrlen = data->host_addrlen; | |
1214 | if (copy_from_user(sap, data->host_addr, data->host_addrlen)) | |
1215 | return -EFAULT; | |
1216 | if (!nfs_verify_server_address(sap)) | |
1217 | goto out_no_address; | |
1218 | ctx->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); | |
1219 | ||
1220 | if (data->auth_flavourlen) { | |
1221 | rpc_authflavor_t pseudoflavor; | |
1222 | ||
1223 | if (data->auth_flavourlen > 1) | |
1224 | goto out_inval_auth; | |
1225 | if (copy_from_user(&pseudoflavor, data->auth_flavours, | |
1226 | sizeof(pseudoflavor))) | |
9954bf92 | 1227 | return -EFAULT; |
a1c7dc5d CH |
1228 | ctx->selected_flavor = pseudoflavor; |
1229 | } else { | |
1230 | ctx->selected_flavor = RPC_AUTH_UNIX; | |
9954bf92 DH |
1231 | } |
1232 | ||
a1c7dc5d CH |
1233 | c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); |
1234 | if (IS_ERR(c)) | |
1235 | return PTR_ERR(c); | |
1236 | ctx->nfs_server.hostname = c; | |
1237 | ||
1238 | c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN); | |
1239 | if (IS_ERR(c)) | |
1240 | return PTR_ERR(c); | |
1241 | ctx->nfs_server.export_path = c; | |
1242 | dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", c); | |
1243 | ||
1244 | c = strndup_user(data->client_addr.data, 16); | |
1245 | if (IS_ERR(c)) | |
1246 | return PTR_ERR(c); | |
1247 | ctx->client_address = c; | |
1248 | ||
1249 | /* | |
1250 | * Translate to nfs_fs_context, which nfs_fill_super | |
1251 | * can deal with. | |
1252 | */ | |
1253 | ||
1254 | ctx->flags = data->flags & NFS4_MOUNT_FLAGMASK; | |
1255 | ctx->rsize = data->rsize; | |
1256 | ctx->wsize = data->wsize; | |
1257 | ctx->timeo = data->timeo; | |
1258 | ctx->retrans = data->retrans; | |
1259 | ctx->acregmin = data->acregmin; | |
1260 | ctx->acregmax = data->acregmax; | |
1261 | ctx->acdirmin = data->acdirmin; | |
1262 | ctx->acdirmax = data->acdirmax; | |
1263 | ctx->nfs_server.protocol = data->proto; | |
90ff57bf TM |
1264 | ret = nfs_validate_transport_protocol(fc, ctx); |
1265 | if (ret) | |
1266 | return ret; | |
a1c7dc5d | 1267 | done: |
f2aedb71 | 1268 | ctx->skip_reconfig_option_check = true; |
9954bf92 DH |
1269 | return 0; |
1270 | ||
9954bf92 | 1271 | out_inval_auth: |
ce8866f0 SM |
1272 | return nfs_invalf(fc, "NFS4: Invalid number of RPC auth flavours %d", |
1273 | data->auth_flavourlen); | |
9954bf92 DH |
1274 | |
1275 | out_no_address: | |
ce8866f0 | 1276 | return nfs_invalf(fc, "NFS4: mount program didn't pass remote address"); |
9954bf92 | 1277 | } |
f2aedb71 | 1278 | #endif |
9954bf92 | 1279 | |
f2aedb71 DH |
1280 | /* |
1281 | * Parse a monolithic block of data from sys_mount(). | |
1282 | */ | |
1283 | static int nfs_fs_context_parse_monolithic(struct fs_context *fc, | |
1284 | void *data) | |
9954bf92 | 1285 | { |
f2aedb71 DH |
1286 | if (fc->fs_type == &nfs_fs_type) |
1287 | return nfs23_parse_monolithic(fc, data); | |
1288 | ||
1289 | #if IS_ENABLED(CONFIG_NFS_V4) | |
1290 | if (fc->fs_type == &nfs4_fs_type) | |
1291 | return nfs4_parse_monolithic(fc, data); | |
9954bf92 DH |
1292 | #endif |
1293 | ||
ce8866f0 | 1294 | return nfs_invalf(fc, "NFS: Unsupported monolithic data version"); |
f2aedb71 DH |
1295 | } |
1296 | ||
1297 | /* | |
1298 | * Validate the preparsed information in the config. | |
1299 | */ | |
1300 | static int nfs_fs_context_validate(struct fs_context *fc) | |
9954bf92 | 1301 | { |
f2aedb71 DH |
1302 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
1303 | struct nfs_subversion *nfs_mod; | |
1304 | struct sockaddr *sap = (struct sockaddr *)&ctx->nfs_server.address; | |
9954bf92 DH |
1305 | int max_namelen = PAGE_SIZE; |
1306 | int max_pathlen = NFS_MAXPATHLEN; | |
f2aedb71 DH |
1307 | int port = 0; |
1308 | int ret; | |
9954bf92 | 1309 | |
f2aedb71 DH |
1310 | if (!fc->source) |
1311 | goto out_no_device_name; | |
1312 | ||
1313 | /* Check for sanity first. */ | |
1314 | if (ctx->minorversion && ctx->version != 4) | |
1315 | goto out_minorversion_mismatch; | |
1316 | ||
1317 | if (ctx->options & NFS_OPTION_MIGRATION && | |
1318 | (ctx->version != 4 || ctx->minorversion != 0)) | |
1319 | goto out_migration_misuse; | |
1320 | ||
1321 | /* Verify that any proto=/mountproto= options match the address | |
1322 | * families in the addr=/mountaddr= options. | |
1323 | */ | |
1324 | if (ctx->protofamily != AF_UNSPEC && | |
1325 | ctx->protofamily != ctx->nfs_server.address.sa_family) | |
1326 | goto out_proto_mismatch; | |
1327 | ||
1328 | if (ctx->mountfamily != AF_UNSPEC) { | |
1329 | if (ctx->mount_server.addrlen) { | |
1330 | if (ctx->mountfamily != ctx->mount_server.address.sa_family) | |
1331 | goto out_mountproto_mismatch; | |
1332 | } else { | |
1333 | if (ctx->mountfamily != ctx->nfs_server.address.sa_family) | |
1334 | goto out_mountproto_mismatch; | |
1335 | } | |
1336 | } | |
9954bf92 DH |
1337 | |
1338 | if (!nfs_verify_server_address(sap)) | |
1339 | goto out_no_address; | |
1340 | ||
90ff57bf TM |
1341 | ret = nfs_validate_transport_protocol(fc, ctx); |
1342 | if (ret) | |
1343 | return ret; | |
1344 | ||
5eb005ca | 1345 | if (ctx->version == 4) { |
62a55d08 SM |
1346 | if (IS_ENABLED(CONFIG_NFS_V4)) { |
1347 | if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) | |
1348 | port = NFS_RDMA_PORT; | |
1349 | else | |
1350 | port = NFS_PORT; | |
1351 | max_namelen = NFS4_MAXNAMLEN; | |
1352 | max_pathlen = NFS4_MAXPATHLEN; | |
62a55d08 SM |
1353 | ctx->flags &= ~(NFS_MOUNT_NONLM | NFS_MOUNT_NOACL | |
1354 | NFS_MOUNT_VER3 | NFS_MOUNT_LOCAL_FLOCK | | |
1355 | NFS_MOUNT_LOCAL_FCNTL); | |
1356 | } else { | |
1357 | goto out_v4_not_compiled; | |
1358 | } | |
9954bf92 | 1359 | } else { |
5eb005ca DH |
1360 | nfs_set_mount_transport_protocol(ctx); |
1361 | if (ctx->nfs_server.protocol == XPRT_TRANSPORT_RDMA) | |
9954bf92 DH |
1362 | port = NFS_RDMA_PORT; |
1363 | } | |
1364 | ||
5eb005ca | 1365 | nfs_set_port(sap, &ctx->nfs_server.port, port); |
9954bf92 | 1366 | |
62a55d08 | 1367 | ret = nfs_parse_source(fc, max_namelen, max_pathlen); |
f2aedb71 DH |
1368 | if (ret < 0) |
1369 | return ret; | |
1370 | ||
1371 | /* Load the NFS protocol module if we haven't done so yet */ | |
62a55d08 | 1372 | if (!ctx->nfs_mod) { |
f2aedb71 DH |
1373 | nfs_mod = get_nfs_version(ctx->version); |
1374 | if (IS_ERR(nfs_mod)) { | |
1375 | ret = PTR_ERR(nfs_mod); | |
1376 | goto out_version_unavailable; | |
1377 | } | |
62a55d08 | 1378 | ctx->nfs_mod = nfs_mod; |
f2aedb71 | 1379 | } |
1cef2184 SM |
1380 | |
1381 | /* Ensure the filesystem context has the correct fs_type */ | |
1382 | if (fc->fs_type != ctx->nfs_mod->nfs_fs) { | |
1383 | module_put(fc->fs_type->owner); | |
1384 | __module_get(ctx->nfs_mod->nfs_fs->owner); | |
1385 | fc->fs_type = ctx->nfs_mod->nfs_fs; | |
1386 | } | |
f2aedb71 | 1387 | return 0; |
9954bf92 | 1388 | |
f2aedb71 | 1389 | out_no_device_name: |
ce8866f0 | 1390 | return nfs_invalf(fc, "NFS: Device name not specified"); |
9954bf92 | 1391 | out_v4_not_compiled: |
ce8866f0 | 1392 | nfs_errorf(fc, "NFS: NFSv4 is not compiled into kernel"); |
9954bf92 | 1393 | return -EPROTONOSUPPORT; |
9954bf92 | 1394 | out_no_address: |
ce8866f0 | 1395 | return nfs_invalf(fc, "NFS: mount program didn't pass remote address"); |
f2aedb71 | 1396 | out_mountproto_mismatch: |
ce8866f0 | 1397 | return nfs_invalf(fc, "NFS: Mount server address does not match mountproto= option"); |
f2aedb71 | 1398 | out_proto_mismatch: |
ce8866f0 | 1399 | return nfs_invalf(fc, "NFS: Server address does not match proto= option"); |
f2aedb71 | 1400 | out_minorversion_mismatch: |
ce8866f0 | 1401 | return nfs_invalf(fc, "NFS: Mount option vers=%u does not support minorversion=%u", |
f2aedb71 | 1402 | ctx->version, ctx->minorversion); |
f2aedb71 | 1403 | out_migration_misuse: |
ce8866f0 | 1404 | return nfs_invalf(fc, "NFS: 'Migration' not supported for this NFS version"); |
f2aedb71 | 1405 | out_version_unavailable: |
ce8866f0 | 1406 | nfs_errorf(fc, "NFS: Version unavailable"); |
f2aedb71 DH |
1407 | return ret; |
1408 | } | |
1409 | ||
1410 | /* | |
1411 | * Create an NFS superblock by the appropriate method. | |
1412 | */ | |
1413 | static int nfs_get_tree(struct fs_context *fc) | |
1414 | { | |
1415 | struct nfs_fs_context *ctx = nfs_fc2context(fc); | |
1416 | int err = nfs_fs_context_validate(fc); | |
1417 | ||
1418 | if (err) | |
1419 | return err; | |
1420 | if (!ctx->internal) | |
62a55d08 | 1421 | return ctx->nfs_mod->rpc_ops->try_get_tree(fc); |
f2aedb71 DH |
1422 | else |
1423 | return nfs_get_tree_common(fc); | |
9954bf92 | 1424 | } |
f2aedb71 DH |
1425 | |
1426 | /* | |
1427 | * Handle duplication of a configuration. The caller copied *src into *sc, but | |
1428 | * it can't deal with resource pointers in the filesystem context, so we have | |
1429 | * to do that. We need to clear pointers, copy data or get extra refs as | |
1430 | * appropriate. | |
1431 | */ | |
1432 | static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc) | |
1433 | { | |
1434 | struct nfs_fs_context *src = nfs_fc2context(src_fc), *ctx; | |
1435 | ||
1436 | ctx = kmemdup(src, sizeof(struct nfs_fs_context), GFP_KERNEL); | |
1437 | if (!ctx) | |
1438 | return -ENOMEM; | |
1439 | ||
62a55d08 SM |
1440 | ctx->mntfh = nfs_alloc_fhandle(); |
1441 | if (!ctx->mntfh) { | |
f2aedb71 DH |
1442 | kfree(ctx); |
1443 | return -ENOMEM; | |
1444 | } | |
62a55d08 | 1445 | nfs_copy_fh(ctx->mntfh, src->mntfh); |
f2aedb71 | 1446 | |
62a55d08 | 1447 | __module_get(ctx->nfs_mod->owner); |
f2aedb71 DH |
1448 | ctx->client_address = NULL; |
1449 | ctx->mount_server.hostname = NULL; | |
1450 | ctx->nfs_server.export_path = NULL; | |
1451 | ctx->nfs_server.hostname = NULL; | |
1452 | ctx->fscache_uniq = NULL; | |
f2aedb71 DH |
1453 | ctx->clone_data.fattr = NULL; |
1454 | fc->fs_private = ctx; | |
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | static void nfs_fs_context_free(struct fs_context *fc) | |
1459 | { | |
1460 | struct nfs_fs_context *ctx = nfs_fc2context(fc); | |
1461 | ||
1462 | if (ctx) { | |
62a55d08 SM |
1463 | if (ctx->server) |
1464 | nfs_free_server(ctx->server); | |
1465 | if (ctx->nfs_mod) | |
1466 | put_nfs_version(ctx->nfs_mod); | |
f2aedb71 DH |
1467 | kfree(ctx->client_address); |
1468 | kfree(ctx->mount_server.hostname); | |
1469 | kfree(ctx->nfs_server.export_path); | |
1470 | kfree(ctx->nfs_server.hostname); | |
1471 | kfree(ctx->fscache_uniq); | |
62a55d08 | 1472 | nfs_free_fhandle(ctx->mntfh); |
f2aedb71 DH |
1473 | nfs_free_fattr(ctx->clone_data.fattr); |
1474 | kfree(ctx); | |
1475 | } | |
1476 | } | |
1477 | ||
1478 | static const struct fs_context_operations nfs_fs_context_ops = { | |
1479 | .free = nfs_fs_context_free, | |
1480 | .dup = nfs_fs_context_dup, | |
1481 | .parse_param = nfs_fs_context_parse_param, | |
1482 | .parse_monolithic = nfs_fs_context_parse_monolithic, | |
1483 | .get_tree = nfs_get_tree, | |
1484 | .reconfigure = nfs_reconfigure, | |
1485 | }; | |
1486 | ||
1487 | /* | |
1488 | * Prepare superblock configuration. We use the namespaces attached to the | |
1489 | * context. This may be the current process's namespaces, or it may be a | |
1490 | * container's namespaces. | |
1491 | */ | |
1492 | static int nfs_init_fs_context(struct fs_context *fc) | |
1493 | { | |
1494 | struct nfs_fs_context *ctx; | |
1495 | ||
1496 | ctx = kzalloc(sizeof(struct nfs_fs_context), GFP_KERNEL); | |
1497 | if (unlikely(!ctx)) | |
1498 | return -ENOMEM; | |
1499 | ||
62a55d08 SM |
1500 | ctx->mntfh = nfs_alloc_fhandle(); |
1501 | if (unlikely(!ctx->mntfh)) { | |
f2aedb71 DH |
1502 | kfree(ctx); |
1503 | return -ENOMEM; | |
1504 | } | |
1505 | ||
1506 | ctx->protofamily = AF_UNSPEC; | |
1507 | ctx->mountfamily = AF_UNSPEC; | |
1508 | ctx->mount_server.port = NFS_UNSPEC_PORT; | |
1509 | ||
1510 | if (fc->root) { | |
1511 | /* reconfigure, start with the current config */ | |
1512 | struct nfs_server *nfss = fc->root->d_sb->s_fs_info; | |
1513 | struct net *net = nfss->nfs_client->cl_net; | |
1514 | ||
1515 | ctx->flags = nfss->flags; | |
1516 | ctx->rsize = nfss->rsize; | |
1517 | ctx->wsize = nfss->wsize; | |
1518 | ctx->retrans = nfss->client->cl_timeout->to_retries; | |
1519 | ctx->selected_flavor = nfss->client->cl_auth->au_flavor; | |
1520 | ctx->acregmin = nfss->acregmin / HZ; | |
1521 | ctx->acregmax = nfss->acregmax / HZ; | |
1522 | ctx->acdirmin = nfss->acdirmin / HZ; | |
1523 | ctx->acdirmax = nfss->acdirmax / HZ; | |
1524 | ctx->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; | |
1525 | ctx->nfs_server.port = nfss->port; | |
1526 | ctx->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; | |
1527 | ctx->version = nfss->nfs_client->rpc_ops->version; | |
1528 | ctx->minorversion = nfss->nfs_client->cl_minorversion; | |
1529 | ||
1530 | memcpy(&ctx->nfs_server.address, &nfss->nfs_client->cl_addr, | |
1531 | ctx->nfs_server.addrlen); | |
1532 | ||
1533 | if (fc->net_ns != net) { | |
1534 | put_net(fc->net_ns); | |
1535 | fc->net_ns = get_net(net); | |
1536 | } | |
1537 | ||
62a55d08 SM |
1538 | ctx->nfs_mod = nfss->nfs_client->cl_nfs_mod; |
1539 | __module_get(ctx->nfs_mod->owner); | |
f2aedb71 DH |
1540 | } else { |
1541 | /* defaults */ | |
1542 | ctx->timeo = NFS_UNSPEC_TIMEO; | |
1543 | ctx->retrans = NFS_UNSPEC_RETRANS; | |
1544 | ctx->acregmin = NFS_DEF_ACREGMIN; | |
1545 | ctx->acregmax = NFS_DEF_ACREGMAX; | |
1546 | ctx->acdirmin = NFS_DEF_ACDIRMIN; | |
1547 | ctx->acdirmax = NFS_DEF_ACDIRMAX; | |
1548 | ctx->nfs_server.port = NFS_UNSPEC_PORT; | |
1549 | ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP; | |
1550 | ctx->selected_flavor = RPC_AUTH_MAXFLAVOR; | |
1551 | ctx->minorversion = 0; | |
1552 | ctx->need_mount = true; | |
6c17260c TM |
1553 | |
1554 | fc->s_iflags |= SB_I_STABLE_WRITES; | |
f2aedb71 | 1555 | } |
f2aedb71 DH |
1556 | fc->fs_private = ctx; |
1557 | fc->ops = &nfs_fs_context_ops; | |
1558 | return 0; | |
1559 | } | |
1560 | ||
1561 | struct file_system_type nfs_fs_type = { | |
1562 | .owner = THIS_MODULE, | |
1563 | .name = "nfs", | |
1564 | .init_fs_context = nfs_init_fs_context, | |
d7167b14 | 1565 | .parameters = nfs_fs_parameters, |
f2aedb71 DH |
1566 | .kill_sb = nfs_kill_super, |
1567 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, | |
1568 | }; | |
1569 | MODULE_ALIAS_FS("nfs"); | |
1570 | EXPORT_SYMBOL_GPL(nfs_fs_type); | |
1571 | ||
1572 | #if IS_ENABLED(CONFIG_NFS_V4) | |
1573 | struct file_system_type nfs4_fs_type = { | |
1574 | .owner = THIS_MODULE, | |
1575 | .name = "nfs4", | |
1576 | .init_fs_context = nfs_init_fs_context, | |
d7167b14 | 1577 | .parameters = nfs_fs_parameters, |
f2aedb71 DH |
1578 | .kill_sb = nfs_kill_super, |
1579 | .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, | |
1580 | }; | |
1581 | MODULE_ALIAS_FS("nfs4"); | |
1582 | MODULE_ALIAS("nfs4"); | |
1583 | EXPORT_SYMBOL_GPL(nfs4_fs_type); | |
1584 | #endif /* CONFIG_NFS_V4 */ |