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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Neil Brown <neilb@cse.unsw.edu.au> | |
3 | * J. Bruce Fields <bfields@umich.edu> | |
4 | * Andy Adamson <andros@umich.edu> | |
5 | * Dug Song <dugsong@monkey.org> | |
6 | * | |
7 | * RPCSEC_GSS server authentication. | |
8 | * This implements RPCSEC_GSS as defined in rfc2203 (rpcsec_gss) and rfc2078 | |
9 | * (gssapi) | |
10 | * | |
11 | * The RPCSEC_GSS involves three stages: | |
12 | * 1/ context creation | |
13 | * 2/ data exchange | |
14 | * 3/ context destruction | |
15 | * | |
16 | * Context creation is handled largely by upcalls to user-space. | |
17 | * In particular, GSS_Accept_sec_context is handled by an upcall | |
18 | * Data exchange is handled entirely within the kernel | |
19 | * In particular, GSS_GetMIC, GSS_VerifyMIC, GSS_Seal, GSS_Unseal are in-kernel. | |
20 | * Context destruction is handled in-kernel | |
21 | * GSS_Delete_sec_context is in-kernel | |
22 | * | |
23 | * Context creation is initiated by a RPCSEC_GSS_INIT request arriving. | |
24 | * The context handle and gss_token are used as a key into the rpcsec_init cache. | |
25 | * The content of this cache includes some of the outputs of GSS_Accept_sec_context, | |
26 | * being major_status, minor_status, context_handle, reply_token. | |
27 | * These are sent back to the client. | |
28 | * Sequence window management is handled by the kernel. The window size if currently | |
29 | * a compile time constant. | |
30 | * | |
31 | * When user-space is happy that a context is established, it places an entry | |
32 | * in the rpcsec_context cache. The key for this cache is the context_handle. | |
33 | * The content includes: | |
34 | * uid/gidlist - for determining access rights | |
35 | * mechanism type | |
36 | * mechanism specific information, such as a key | |
37 | * | |
38 | */ | |
39 | ||
5a0e3ad6 | 40 | #include <linux/slab.h> |
1da177e4 LT |
41 | #include <linux/types.h> |
42 | #include <linux/module.h> | |
43 | #include <linux/pagemap.h> | |
ae2975bc | 44 | #include <linux/user_namespace.h> |
1da177e4 LT |
45 | |
46 | #include <linux/sunrpc/auth_gss.h> | |
1da177e4 LT |
47 | #include <linux/sunrpc/gss_err.h> |
48 | #include <linux/sunrpc/svcauth.h> | |
49 | #include <linux/sunrpc/svcauth_gss.h> | |
50 | #include <linux/sunrpc/cache.h> | |
51 | ||
a1db410d SK |
52 | #include "../netns.h" |
53 | ||
1da177e4 LT |
54 | #ifdef RPC_DEBUG |
55 | # define RPCDBG_FACILITY RPCDBG_AUTH | |
56 | #endif | |
57 | ||
58 | /* The rpcsec_init cache is used for mapping RPCSEC_GSS_{,CONT_}INIT requests | |
59 | * into replies. | |
60 | * | |
61 | * Key is context handle (\x if empty) and gss_token. | |
62 | * Content is major_status minor_status (integers) context_handle, reply_token. | |
63 | * | |
64 | */ | |
65 | ||
66 | static int netobj_equal(struct xdr_netobj *a, struct xdr_netobj *b) | |
67 | { | |
68 | return a->len == b->len && 0 == memcmp(a->data, b->data, a->len); | |
69 | } | |
70 | ||
71 | #define RSI_HASHBITS 6 | |
72 | #define RSI_HASHMAX (1<<RSI_HASHBITS) | |
1da177e4 LT |
73 | |
74 | struct rsi { | |
75 | struct cache_head h; | |
76 | struct xdr_netobj in_handle, in_token; | |
77 | struct xdr_netobj out_handle, out_token; | |
78 | int major_status, minor_status; | |
79 | }; | |
80 | ||
a1db410d SK |
81 | static struct rsi *rsi_update(struct cache_detail *cd, struct rsi *new, struct rsi *old); |
82 | static struct rsi *rsi_lookup(struct cache_detail *cd, struct rsi *item); | |
1da177e4 LT |
83 | |
84 | static void rsi_free(struct rsi *rsii) | |
85 | { | |
86 | kfree(rsii->in_handle.data); | |
87 | kfree(rsii->in_token.data); | |
88 | kfree(rsii->out_handle.data); | |
89 | kfree(rsii->out_token.data); | |
90 | } | |
91 | ||
baab935f | 92 | static void rsi_put(struct kref *ref) |
1da177e4 | 93 | { |
baab935f N |
94 | struct rsi *rsii = container_of(ref, struct rsi, h.ref); |
95 | rsi_free(rsii); | |
96 | kfree(rsii); | |
1da177e4 LT |
97 | } |
98 | ||
99 | static inline int rsi_hash(struct rsi *item) | |
100 | { | |
101 | return hash_mem(item->in_handle.data, item->in_handle.len, RSI_HASHBITS) | |
102 | ^ hash_mem(item->in_token.data, item->in_token.len, RSI_HASHBITS); | |
103 | } | |
104 | ||
d4d11ea9 | 105 | static int rsi_match(struct cache_head *a, struct cache_head *b) |
1da177e4 | 106 | { |
d4d11ea9 N |
107 | struct rsi *item = container_of(a, struct rsi, h); |
108 | struct rsi *tmp = container_of(b, struct rsi, h); | |
f64f9e71 JP |
109 | return netobj_equal(&item->in_handle, &tmp->in_handle) && |
110 | netobj_equal(&item->in_token, &tmp->in_token); | |
1da177e4 LT |
111 | } |
112 | ||
113 | static int dup_to_netobj(struct xdr_netobj *dst, char *src, int len) | |
114 | { | |
115 | dst->len = len; | |
e69062b4 | 116 | dst->data = (len ? kmemdup(src, len, GFP_KERNEL) : NULL); |
1da177e4 LT |
117 | if (len && !dst->data) |
118 | return -ENOMEM; | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static inline int dup_netobj(struct xdr_netobj *dst, struct xdr_netobj *src) | |
123 | { | |
124 | return dup_to_netobj(dst, src->data, src->len); | |
125 | } | |
126 | ||
d4d11ea9 | 127 | static void rsi_init(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 128 | { |
d4d11ea9 N |
129 | struct rsi *new = container_of(cnew, struct rsi, h); |
130 | struct rsi *item = container_of(citem, struct rsi, h); | |
131 | ||
1da177e4 LT |
132 | new->out_handle.data = NULL; |
133 | new->out_handle.len = 0; | |
134 | new->out_token.data = NULL; | |
135 | new->out_token.len = 0; | |
136 | new->in_handle.len = item->in_handle.len; | |
137 | item->in_handle.len = 0; | |
138 | new->in_token.len = item->in_token.len; | |
139 | item->in_token.len = 0; | |
140 | new->in_handle.data = item->in_handle.data; | |
141 | item->in_handle.data = NULL; | |
142 | new->in_token.data = item->in_token.data; | |
143 | item->in_token.data = NULL; | |
144 | } | |
145 | ||
d4d11ea9 | 146 | static void update_rsi(struct cache_head *cnew, struct cache_head *citem) |
1da177e4 | 147 | { |
d4d11ea9 N |
148 | struct rsi *new = container_of(cnew, struct rsi, h); |
149 | struct rsi *item = container_of(citem, struct rsi, h); | |
150 | ||
1da177e4 LT |
151 | BUG_ON(new->out_handle.data || new->out_token.data); |
152 | new->out_handle.len = item->out_handle.len; | |
153 | item->out_handle.len = 0; | |
154 | new->out_token.len = item->out_token.len; | |
155 | item->out_token.len = 0; | |
156 | new->out_handle.data = item->out_handle.data; | |
157 | item->out_handle.data = NULL; | |
158 | new->out_token.data = item->out_token.data; | |
159 | item->out_token.data = NULL; | |
160 | ||
161 | new->major_status = item->major_status; | |
162 | new->minor_status = item->minor_status; | |
163 | } | |
164 | ||
d4d11ea9 N |
165 | static struct cache_head *rsi_alloc(void) |
166 | { | |
167 | struct rsi *rsii = kmalloc(sizeof(*rsii), GFP_KERNEL); | |
168 | if (rsii) | |
169 | return &rsii->h; | |
170 | else | |
171 | return NULL; | |
172 | } | |
173 | ||
1da177e4 | 174 | static void rsi_request(struct cache_detail *cd, |
cca5172a YH |
175 | struct cache_head *h, |
176 | char **bpp, int *blen) | |
1da177e4 LT |
177 | { |
178 | struct rsi *rsii = container_of(h, struct rsi, h); | |
179 | ||
180 | qword_addhex(bpp, blen, rsii->in_handle.data, rsii->in_handle.len); | |
181 | qword_addhex(bpp, blen, rsii->in_token.data, rsii->in_token.len); | |
182 | (*bpp)[-1] = '\n'; | |
183 | } | |
184 | ||
bc74b4f5 TM |
185 | static int rsi_upcall(struct cache_detail *cd, struct cache_head *h) |
186 | { | |
187 | return sunrpc_cache_pipe_upcall(cd, h, rsi_request); | |
188 | } | |
189 | ||
1da177e4 LT |
190 | |
191 | static int rsi_parse(struct cache_detail *cd, | |
cca5172a | 192 | char *mesg, int mlen) |
1da177e4 LT |
193 | { |
194 | /* context token expiry major minor context token */ | |
195 | char *buf = mesg; | |
196 | char *ep; | |
197 | int len; | |
198 | struct rsi rsii, *rsip = NULL; | |
199 | time_t expiry; | |
200 | int status = -EINVAL; | |
201 | ||
202 | memset(&rsii, 0, sizeof(rsii)); | |
203 | /* handle */ | |
204 | len = qword_get(&mesg, buf, mlen); | |
205 | if (len < 0) | |
206 | goto out; | |
207 | status = -ENOMEM; | |
208 | if (dup_to_netobj(&rsii.in_handle, buf, len)) | |
209 | goto out; | |
210 | ||
211 | /* token */ | |
212 | len = qword_get(&mesg, buf, mlen); | |
213 | status = -EINVAL; | |
214 | if (len < 0) | |
215 | goto out; | |
216 | status = -ENOMEM; | |
217 | if (dup_to_netobj(&rsii.in_token, buf, len)) | |
218 | goto out; | |
219 | ||
a1db410d | 220 | rsip = rsi_lookup(cd, &rsii); |
d4d11ea9 N |
221 | if (!rsip) |
222 | goto out; | |
223 | ||
1da177e4 LT |
224 | rsii.h.flags = 0; |
225 | /* expiry */ | |
226 | expiry = get_expiry(&mesg); | |
227 | status = -EINVAL; | |
228 | if (expiry == 0) | |
229 | goto out; | |
230 | ||
231 | /* major/minor */ | |
232 | len = qword_get(&mesg, buf, mlen); | |
b39c18fc BF |
233 | if (len <= 0) |
234 | goto out; | |
235 | rsii.major_status = simple_strtoul(buf, &ep, 10); | |
236 | if (*ep) | |
237 | goto out; | |
238 | len = qword_get(&mesg, buf, mlen); | |
239 | if (len <= 0) | |
1da177e4 | 240 | goto out; |
b39c18fc BF |
241 | rsii.minor_status = simple_strtoul(buf, &ep, 10); |
242 | if (*ep) | |
1da177e4 | 243 | goto out; |
1da177e4 | 244 | |
b39c18fc BF |
245 | /* out_handle */ |
246 | len = qword_get(&mesg, buf, mlen); | |
247 | if (len < 0) | |
248 | goto out; | |
249 | status = -ENOMEM; | |
250 | if (dup_to_netobj(&rsii.out_handle, buf, len)) | |
251 | goto out; | |
1da177e4 | 252 | |
b39c18fc BF |
253 | /* out_token */ |
254 | len = qword_get(&mesg, buf, mlen); | |
255 | status = -EINVAL; | |
256 | if (len < 0) | |
257 | goto out; | |
258 | status = -ENOMEM; | |
259 | if (dup_to_netobj(&rsii.out_token, buf, len)) | |
260 | goto out; | |
1da177e4 | 261 | rsii.h.expiry_time = expiry; |
a1db410d | 262 | rsip = rsi_update(cd, &rsii, rsip); |
1da177e4 LT |
263 | status = 0; |
264 | out: | |
265 | rsi_free(&rsii); | |
266 | if (rsip) | |
a1db410d | 267 | cache_put(&rsip->h, cd); |
d4d11ea9 N |
268 | else |
269 | status = -ENOMEM; | |
1da177e4 LT |
270 | return status; |
271 | } | |
272 | ||
a1db410d | 273 | static struct cache_detail rsi_cache_template = { |
f35279d3 | 274 | .owner = THIS_MODULE, |
1da177e4 | 275 | .hash_size = RSI_HASHMAX, |
1da177e4 LT |
276 | .name = "auth.rpcsec.init", |
277 | .cache_put = rsi_put, | |
bc74b4f5 | 278 | .cache_upcall = rsi_upcall, |
1da177e4 | 279 | .cache_parse = rsi_parse, |
d4d11ea9 N |
280 | .match = rsi_match, |
281 | .init = rsi_init, | |
282 | .update = update_rsi, | |
283 | .alloc = rsi_alloc, | |
1da177e4 LT |
284 | }; |
285 | ||
a1db410d | 286 | static struct rsi *rsi_lookup(struct cache_detail *cd, struct rsi *item) |
d4d11ea9 N |
287 | { |
288 | struct cache_head *ch; | |
289 | int hash = rsi_hash(item); | |
290 | ||
a1db410d | 291 | ch = sunrpc_cache_lookup(cd, &item->h, hash); |
d4d11ea9 N |
292 | if (ch) |
293 | return container_of(ch, struct rsi, h); | |
294 | else | |
295 | return NULL; | |
296 | } | |
297 | ||
a1db410d | 298 | static struct rsi *rsi_update(struct cache_detail *cd, struct rsi *new, struct rsi *old) |
d4d11ea9 N |
299 | { |
300 | struct cache_head *ch; | |
301 | int hash = rsi_hash(new); | |
302 | ||
a1db410d | 303 | ch = sunrpc_cache_update(cd, &new->h, |
d4d11ea9 N |
304 | &old->h, hash); |
305 | if (ch) | |
306 | return container_of(ch, struct rsi, h); | |
307 | else | |
308 | return NULL; | |
309 | } | |
310 | ||
1da177e4 LT |
311 | |
312 | /* | |
313 | * The rpcsec_context cache is used to store a context that is | |
314 | * used in data exchange. | |
315 | * The key is a context handle. The content is: | |
316 | * uid, gidlist, mechanism, service-set, mech-specific-data | |
317 | */ | |
318 | ||
319 | #define RSC_HASHBITS 10 | |
320 | #define RSC_HASHMAX (1<<RSC_HASHBITS) | |
1da177e4 LT |
321 | |
322 | #define GSS_SEQ_WIN 128 | |
323 | ||
324 | struct gss_svc_seq_data { | |
325 | /* highest seq number seen so far: */ | |
326 | int sd_max; | |
327 | /* for i such that sd_max-GSS_SEQ_WIN < i <= sd_max, the i-th bit of | |
328 | * sd_win is nonzero iff sequence number i has been seen already: */ | |
329 | unsigned long sd_win[GSS_SEQ_WIN/BITS_PER_LONG]; | |
330 | spinlock_t sd_lock; | |
331 | }; | |
332 | ||
333 | struct rsc { | |
334 | struct cache_head h; | |
335 | struct xdr_netobj handle; | |
336 | struct svc_cred cred; | |
337 | struct gss_svc_seq_data seqdata; | |
338 | struct gss_ctx *mechctx; | |
339 | }; | |
340 | ||
a1db410d SK |
341 | static struct rsc *rsc_update(struct cache_detail *cd, struct rsc *new, struct rsc *old); |
342 | static struct rsc *rsc_lookup(struct cache_detail *cd, struct rsc *item); | |
1da177e4 LT |
343 | |
344 | static void rsc_free(struct rsc *rsci) | |
345 | { | |
346 | kfree(rsci->handle.data); | |
347 | if (rsci->mechctx) | |
348 | gss_delete_sec_context(&rsci->mechctx); | |
03a4e1f6 | 349 | free_svc_cred(&rsci->cred); |
1da177e4 LT |
350 | } |
351 | ||
baab935f | 352 | static void rsc_put(struct kref *ref) |
1da177e4 | 353 | { |
baab935f | 354 | struct rsc *rsci = container_of(ref, struct rsc, h.ref); |
1da177e4 | 355 | |
baab935f N |
356 | rsc_free(rsci); |
357 | kfree(rsci); | |
1da177e4 LT |
358 | } |
359 | ||
360 | static inline int | |
361 | rsc_hash(struct rsc *rsci) | |
362 | { | |
363 | return hash_mem(rsci->handle.data, rsci->handle.len, RSC_HASHBITS); | |
364 | } | |
365 | ||
17f834b6 N |
366 | static int |
367 | rsc_match(struct cache_head *a, struct cache_head *b) | |
1da177e4 | 368 | { |
17f834b6 N |
369 | struct rsc *new = container_of(a, struct rsc, h); |
370 | struct rsc *tmp = container_of(b, struct rsc, h); | |
371 | ||
1da177e4 LT |
372 | return netobj_equal(&new->handle, &tmp->handle); |
373 | } | |
374 | ||
17f834b6 N |
375 | static void |
376 | rsc_init(struct cache_head *cnew, struct cache_head *ctmp) | |
1da177e4 | 377 | { |
17f834b6 N |
378 | struct rsc *new = container_of(cnew, struct rsc, h); |
379 | struct rsc *tmp = container_of(ctmp, struct rsc, h); | |
380 | ||
1da177e4 LT |
381 | new->handle.len = tmp->handle.len; |
382 | tmp->handle.len = 0; | |
383 | new->handle.data = tmp->handle.data; | |
384 | tmp->handle.data = NULL; | |
385 | new->mechctx = NULL; | |
386 | new->cred.cr_group_info = NULL; | |
03a4e1f6 | 387 | new->cred.cr_principal = NULL; |
1da177e4 LT |
388 | } |
389 | ||
17f834b6 N |
390 | static void |
391 | update_rsc(struct cache_head *cnew, struct cache_head *ctmp) | |
1da177e4 | 392 | { |
17f834b6 N |
393 | struct rsc *new = container_of(cnew, struct rsc, h); |
394 | struct rsc *tmp = container_of(ctmp, struct rsc, h); | |
395 | ||
1da177e4 LT |
396 | new->mechctx = tmp->mechctx; |
397 | tmp->mechctx = NULL; | |
398 | memset(&new->seqdata, 0, sizeof(new->seqdata)); | |
399 | spin_lock_init(&new->seqdata.sd_lock); | |
400 | new->cred = tmp->cred; | |
401 | tmp->cred.cr_group_info = NULL; | |
03a4e1f6 BF |
402 | new->cred.cr_principal = tmp->cred.cr_principal; |
403 | tmp->cred.cr_principal = NULL; | |
1da177e4 LT |
404 | } |
405 | ||
17f834b6 N |
406 | static struct cache_head * |
407 | rsc_alloc(void) | |
408 | { | |
409 | struct rsc *rsci = kmalloc(sizeof(*rsci), GFP_KERNEL); | |
410 | if (rsci) | |
411 | return &rsci->h; | |
412 | else | |
413 | return NULL; | |
414 | } | |
415 | ||
1da177e4 LT |
416 | static int rsc_parse(struct cache_detail *cd, |
417 | char *mesg, int mlen) | |
418 | { | |
419 | /* contexthandle expiry [ uid gid N <n gids> mechname ...mechdata... ] */ | |
420 | char *buf = mesg; | |
683428fa | 421 | int id; |
1da177e4 LT |
422 | int len, rv; |
423 | struct rsc rsci, *rscp = NULL; | |
424 | time_t expiry; | |
425 | int status = -EINVAL; | |
1df0cada | 426 | struct gss_api_mech *gm = NULL; |
1da177e4 LT |
427 | |
428 | memset(&rsci, 0, sizeof(rsci)); | |
429 | /* context handle */ | |
430 | len = qword_get(&mesg, buf, mlen); | |
431 | if (len < 0) goto out; | |
432 | status = -ENOMEM; | |
433 | if (dup_to_netobj(&rsci.handle, buf, len)) | |
434 | goto out; | |
435 | ||
436 | rsci.h.flags = 0; | |
437 | /* expiry */ | |
438 | expiry = get_expiry(&mesg); | |
439 | status = -EINVAL; | |
440 | if (expiry == 0) | |
441 | goto out; | |
442 | ||
a1db410d | 443 | rscp = rsc_lookup(cd, &rsci); |
17f834b6 N |
444 | if (!rscp) |
445 | goto out; | |
446 | ||
1da177e4 | 447 | /* uid, or NEGATIVE */ |
683428fa | 448 | rv = get_int(&mesg, &id); |
1da177e4 LT |
449 | if (rv == -EINVAL) |
450 | goto out; | |
451 | if (rv == -ENOENT) | |
452 | set_bit(CACHE_NEGATIVE, &rsci.h.flags); | |
453 | else { | |
454 | int N, i; | |
1da177e4 | 455 | |
683428fa EB |
456 | /* uid */ |
457 | rsci.cred.cr_uid = make_kuid(&init_user_ns, id); | |
458 | if (!uid_valid(rsci.cred.cr_uid)) | |
459 | goto out; | |
460 | ||
1da177e4 | 461 | /* gid */ |
683428fa EB |
462 | if (get_int(&mesg, &id)) |
463 | goto out; | |
464 | rsci.cred.cr_gid = make_kgid(&init_user_ns, id); | |
465 | if (!gid_valid(rsci.cred.cr_gid)) | |
1da177e4 LT |
466 | goto out; |
467 | ||
468 | /* number of additional gid's */ | |
469 | if (get_int(&mesg, &N)) | |
470 | goto out; | |
471 | status = -ENOMEM; | |
472 | rsci.cred.cr_group_info = groups_alloc(N); | |
473 | if (rsci.cred.cr_group_info == NULL) | |
474 | goto out; | |
475 | ||
476 | /* gid's */ | |
477 | status = -EINVAL; | |
478 | for (i=0; i<N; i++) { | |
ae2975bc | 479 | kgid_t kgid; |
683428fa | 480 | if (get_int(&mesg, &id)) |
1da177e4 | 481 | goto out; |
683428fa | 482 | kgid = make_kgid(&init_user_ns, id); |
ae2975bc EB |
483 | if (!gid_valid(kgid)) |
484 | goto out; | |
485 | GROUP_AT(rsci.cred.cr_group_info, i) = kgid; | |
1da177e4 LT |
486 | } |
487 | ||
488 | /* mech name */ | |
489 | len = qword_get(&mesg, buf, mlen); | |
490 | if (len < 0) | |
491 | goto out; | |
492 | gm = gss_mech_get_by_name(buf); | |
493 | status = -EOPNOTSUPP; | |
494 | if (!gm) | |
495 | goto out; | |
496 | ||
497 | status = -EINVAL; | |
498 | /* mech-specific data: */ | |
499 | len = qword_get(&mesg, buf, mlen); | |
1df0cada | 500 | if (len < 0) |
1da177e4 | 501 | goto out; |
1f4c86c0 | 502 | status = gss_import_sec_context(buf, len, gm, &rsci.mechctx, GFP_KERNEL); |
1df0cada | 503 | if (status) |
1da177e4 | 504 | goto out; |
68e76ad0 OK |
505 | |
506 | /* get client name */ | |
507 | len = qword_get(&mesg, buf, mlen); | |
508 | if (len > 0) { | |
03a4e1f6 BF |
509 | rsci.cred.cr_principal = kstrdup(buf, GFP_KERNEL); |
510 | if (!rsci.cred.cr_principal) | |
68e76ad0 OK |
511 | goto out; |
512 | } | |
513 | ||
1da177e4 LT |
514 | } |
515 | rsci.h.expiry_time = expiry; | |
a1db410d | 516 | rscp = rsc_update(cd, &rsci, rscp); |
1da177e4 LT |
517 | status = 0; |
518 | out: | |
1df0cada | 519 | gss_mech_put(gm); |
1da177e4 LT |
520 | rsc_free(&rsci); |
521 | if (rscp) | |
a1db410d | 522 | cache_put(&rscp->h, cd); |
17f834b6 N |
523 | else |
524 | status = -ENOMEM; | |
1da177e4 LT |
525 | return status; |
526 | } | |
527 | ||
a1db410d | 528 | static struct cache_detail rsc_cache_template = { |
f35279d3 | 529 | .owner = THIS_MODULE, |
1da177e4 | 530 | .hash_size = RSC_HASHMAX, |
1da177e4 LT |
531 | .name = "auth.rpcsec.context", |
532 | .cache_put = rsc_put, | |
533 | .cache_parse = rsc_parse, | |
17f834b6 N |
534 | .match = rsc_match, |
535 | .init = rsc_init, | |
536 | .update = update_rsc, | |
537 | .alloc = rsc_alloc, | |
1da177e4 LT |
538 | }; |
539 | ||
a1db410d | 540 | static struct rsc *rsc_lookup(struct cache_detail *cd, struct rsc *item) |
17f834b6 N |
541 | { |
542 | struct cache_head *ch; | |
543 | int hash = rsc_hash(item); | |
544 | ||
a1db410d | 545 | ch = sunrpc_cache_lookup(cd, &item->h, hash); |
17f834b6 N |
546 | if (ch) |
547 | return container_of(ch, struct rsc, h); | |
548 | else | |
549 | return NULL; | |
550 | } | |
551 | ||
a1db410d | 552 | static struct rsc *rsc_update(struct cache_detail *cd, struct rsc *new, struct rsc *old) |
17f834b6 N |
553 | { |
554 | struct cache_head *ch; | |
555 | int hash = rsc_hash(new); | |
556 | ||
a1db410d | 557 | ch = sunrpc_cache_update(cd, &new->h, |
17f834b6 N |
558 | &old->h, hash); |
559 | if (ch) | |
560 | return container_of(ch, struct rsc, h); | |
561 | else | |
562 | return NULL; | |
563 | } | |
564 | ||
1da177e4 LT |
565 | |
566 | static struct rsc * | |
a1db410d | 567 | gss_svc_searchbyctx(struct cache_detail *cd, struct xdr_netobj *handle) |
1da177e4 LT |
568 | { |
569 | struct rsc rsci; | |
570 | struct rsc *found; | |
571 | ||
572 | memset(&rsci, 0, sizeof(rsci)); | |
573 | if (dup_to_netobj(&rsci.handle, handle->data, handle->len)) | |
574 | return NULL; | |
a1db410d | 575 | found = rsc_lookup(cd, &rsci); |
1da177e4 LT |
576 | rsc_free(&rsci); |
577 | if (!found) | |
578 | return NULL; | |
a1db410d | 579 | if (cache_check(cd, &found->h, NULL)) |
1da177e4 LT |
580 | return NULL; |
581 | return found; | |
582 | } | |
583 | ||
584 | /* Implements sequence number algorithm as specified in RFC 2203. */ | |
585 | static int | |
586 | gss_check_seq_num(struct rsc *rsci, int seq_num) | |
587 | { | |
588 | struct gss_svc_seq_data *sd = &rsci->seqdata; | |
589 | ||
590 | spin_lock(&sd->sd_lock); | |
591 | if (seq_num > sd->sd_max) { | |
592 | if (seq_num >= sd->sd_max + GSS_SEQ_WIN) { | |
593 | memset(sd->sd_win,0,sizeof(sd->sd_win)); | |
594 | sd->sd_max = seq_num; | |
595 | } else while (sd->sd_max < seq_num) { | |
596 | sd->sd_max++; | |
597 | __clear_bit(sd->sd_max % GSS_SEQ_WIN, sd->sd_win); | |
598 | } | |
599 | __set_bit(seq_num % GSS_SEQ_WIN, sd->sd_win); | |
600 | goto ok; | |
601 | } else if (seq_num <= sd->sd_max - GSS_SEQ_WIN) { | |
602 | goto drop; | |
603 | } | |
604 | /* sd_max - GSS_SEQ_WIN < seq_num <= sd_max */ | |
605 | if (__test_and_set_bit(seq_num % GSS_SEQ_WIN, sd->sd_win)) | |
606 | goto drop; | |
607 | ok: | |
608 | spin_unlock(&sd->sd_lock); | |
609 | return 1; | |
610 | drop: | |
611 | spin_unlock(&sd->sd_lock); | |
612 | return 0; | |
613 | } | |
614 | ||
615 | static inline u32 round_up_to_quad(u32 i) | |
616 | { | |
617 | return (i + 3 ) & ~3; | |
618 | } | |
619 | ||
620 | static inline int | |
621 | svc_safe_getnetobj(struct kvec *argv, struct xdr_netobj *o) | |
622 | { | |
623 | int l; | |
624 | ||
625 | if (argv->iov_len < 4) | |
626 | return -1; | |
76994313 | 627 | o->len = svc_getnl(argv); |
1da177e4 LT |
628 | l = round_up_to_quad(o->len); |
629 | if (argv->iov_len < l) | |
630 | return -1; | |
631 | o->data = argv->iov_base; | |
632 | argv->iov_base += l; | |
633 | argv->iov_len -= l; | |
634 | return 0; | |
635 | } | |
636 | ||
637 | static inline int | |
638 | svc_safe_putnetobj(struct kvec *resv, struct xdr_netobj *o) | |
639 | { | |
753ed90d | 640 | u8 *p; |
1da177e4 LT |
641 | |
642 | if (resv->iov_len + 4 > PAGE_SIZE) | |
643 | return -1; | |
76994313 | 644 | svc_putnl(resv, o->len); |
1da177e4 LT |
645 | p = resv->iov_base + resv->iov_len; |
646 | resv->iov_len += round_up_to_quad(o->len); | |
647 | if (resv->iov_len > PAGE_SIZE) | |
648 | return -1; | |
649 | memcpy(p, o->data, o->len); | |
753ed90d | 650 | memset(p + o->len, 0, round_up_to_quad(o->len) - o->len); |
1da177e4 LT |
651 | return 0; |
652 | } | |
653 | ||
21fcd02b BF |
654 | /* |
655 | * Verify the checksum on the header and return SVC_OK on success. | |
1da177e4 LT |
656 | * Otherwise, return SVC_DROP (in the case of a bad sequence number) |
657 | * or return SVC_DENIED and indicate error in authp. | |
658 | */ | |
659 | static int | |
660 | gss_verify_header(struct svc_rqst *rqstp, struct rsc *rsci, | |
d8ed029d | 661 | __be32 *rpcstart, struct rpc_gss_wire_cred *gc, __be32 *authp) |
1da177e4 LT |
662 | { |
663 | struct gss_ctx *ctx_id = rsci->mechctx; | |
664 | struct xdr_buf rpchdr; | |
665 | struct xdr_netobj checksum; | |
666 | u32 flavor = 0; | |
667 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
668 | struct kvec iov; | |
669 | ||
670 | /* data to compute the checksum over: */ | |
671 | iov.iov_base = rpcstart; | |
672 | iov.iov_len = (u8 *)argv->iov_base - (u8 *)rpcstart; | |
673 | xdr_buf_from_iov(&iov, &rpchdr); | |
674 | ||
675 | *authp = rpc_autherr_badverf; | |
676 | if (argv->iov_len < 4) | |
677 | return SVC_DENIED; | |
76994313 | 678 | flavor = svc_getnl(argv); |
1da177e4 LT |
679 | if (flavor != RPC_AUTH_GSS) |
680 | return SVC_DENIED; | |
681 | if (svc_safe_getnetobj(argv, &checksum)) | |
682 | return SVC_DENIED; | |
683 | ||
684 | if (rqstp->rq_deferred) /* skip verification of revisited request */ | |
685 | return SVC_OK; | |
00fd6e14 | 686 | if (gss_verify_mic(ctx_id, &rpchdr, &checksum) != GSS_S_COMPLETE) { |
1da177e4 LT |
687 | *authp = rpcsec_gsserr_credproblem; |
688 | return SVC_DENIED; | |
689 | } | |
690 | ||
691 | if (gc->gc_seq > MAXSEQ) { | |
8885cb36 CL |
692 | dprintk("RPC: svcauth_gss: discarding request with " |
693 | "large sequence number %d\n", gc->gc_seq); | |
1da177e4 LT |
694 | *authp = rpcsec_gsserr_ctxproblem; |
695 | return SVC_DENIED; | |
696 | } | |
697 | if (!gss_check_seq_num(rsci, gc->gc_seq)) { | |
8885cb36 CL |
698 | dprintk("RPC: svcauth_gss: discarding request with " |
699 | "old sequence number %d\n", gc->gc_seq); | |
1da177e4 LT |
700 | return SVC_DROP; |
701 | } | |
702 | return SVC_OK; | |
703 | } | |
704 | ||
822f1005 AA |
705 | static int |
706 | gss_write_null_verf(struct svc_rqst *rqstp) | |
707 | { | |
d8ed029d | 708 | __be32 *p; |
822f1005 | 709 | |
76994313 | 710 | svc_putnl(rqstp->rq_res.head, RPC_AUTH_NULL); |
822f1005 AA |
711 | p = rqstp->rq_res.head->iov_base + rqstp->rq_res.head->iov_len; |
712 | /* don't really need to check if head->iov_len > PAGE_SIZE ... */ | |
713 | *p++ = 0; | |
714 | if (!xdr_ressize_check(rqstp, p)) | |
715 | return -1; | |
716 | return 0; | |
717 | } | |
718 | ||
1da177e4 LT |
719 | static int |
720 | gss_write_verf(struct svc_rqst *rqstp, struct gss_ctx *ctx_id, u32 seq) | |
721 | { | |
d8ed029d | 722 | __be32 xdr_seq; |
1da177e4 LT |
723 | u32 maj_stat; |
724 | struct xdr_buf verf_data; | |
725 | struct xdr_netobj mic; | |
d8ed029d | 726 | __be32 *p; |
1da177e4 LT |
727 | struct kvec iov; |
728 | ||
76994313 | 729 | svc_putnl(rqstp->rq_res.head, RPC_AUTH_GSS); |
1da177e4 LT |
730 | xdr_seq = htonl(seq); |
731 | ||
732 | iov.iov_base = &xdr_seq; | |
733 | iov.iov_len = sizeof(xdr_seq); | |
734 | xdr_buf_from_iov(&iov, &verf_data); | |
735 | p = rqstp->rq_res.head->iov_base + rqstp->rq_res.head->iov_len; | |
736 | mic.data = (u8 *)(p + 1); | |
00fd6e14 | 737 | maj_stat = gss_get_mic(ctx_id, &verf_data, &mic); |
1da177e4 LT |
738 | if (maj_stat != GSS_S_COMPLETE) |
739 | return -1; | |
740 | *p++ = htonl(mic.len); | |
741 | memset((u8 *)p + mic.len, 0, round_up_to_quad(mic.len) - mic.len); | |
742 | p += XDR_QUADLEN(mic.len); | |
743 | if (!xdr_ressize_check(rqstp, p)) | |
744 | return -1; | |
745 | return 0; | |
746 | } | |
747 | ||
748 | struct gss_domain { | |
749 | struct auth_domain h; | |
750 | u32 pseudoflavor; | |
751 | }; | |
752 | ||
753 | static struct auth_domain * | |
754 | find_gss_auth_domain(struct gss_ctx *ctx, u32 svc) | |
755 | { | |
756 | char *name; | |
757 | ||
758 | name = gss_service_to_auth_domain_name(ctx->mech_type, svc); | |
759 | if (!name) | |
760 | return NULL; | |
761 | return auth_domain_find(name); | |
762 | } | |
763 | ||
efc36aa5 N |
764 | static struct auth_ops svcauthops_gss; |
765 | ||
4796f457 BF |
766 | u32 svcauth_gss_flavor(struct auth_domain *dom) |
767 | { | |
768 | struct gss_domain *gd = container_of(dom, struct gss_domain, h); | |
769 | ||
770 | return gd->pseudoflavor; | |
771 | } | |
772 | ||
7bd88269 | 773 | EXPORT_SYMBOL_GPL(svcauth_gss_flavor); |
4796f457 | 774 | |
1da177e4 LT |
775 | int |
776 | svcauth_gss_register_pseudoflavor(u32 pseudoflavor, char * name) | |
777 | { | |
778 | struct gss_domain *new; | |
779 | struct auth_domain *test; | |
780 | int stat = -ENOMEM; | |
781 | ||
782 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
783 | if (!new) | |
784 | goto out; | |
efc36aa5 | 785 | kref_init(&new->h.ref); |
e69062b4 | 786 | new->h.name = kstrdup(name, GFP_KERNEL); |
1da177e4 LT |
787 | if (!new->h.name) |
788 | goto out_free_dom; | |
efc36aa5 | 789 | new->h.flavour = &svcauthops_gss; |
1da177e4 | 790 | new->pseudoflavor = pseudoflavor; |
1da177e4 | 791 | |
cb276805 | 792 | stat = 0; |
efc36aa5 | 793 | test = auth_domain_lookup(name, &new->h); |
cb276805 BF |
794 | if (test != &new->h) { /* Duplicate registration */ |
795 | auth_domain_put(test); | |
796 | kfree(new->h.name); | |
797 | goto out_free_dom; | |
1da177e4 LT |
798 | } |
799 | return 0; | |
800 | ||
801 | out_free_dom: | |
802 | kfree(new); | |
803 | out: | |
804 | return stat; | |
805 | } | |
806 | ||
7bd88269 | 807 | EXPORT_SYMBOL_GPL(svcauth_gss_register_pseudoflavor); |
1da177e4 LT |
808 | |
809 | static inline int | |
810 | read_u32_from_xdr_buf(struct xdr_buf *buf, int base, u32 *obj) | |
811 | { | |
d8ed029d | 812 | __be32 raw; |
1da177e4 LT |
813 | int status; |
814 | ||
815 | status = read_bytes_from_xdr_buf(buf, base, &raw, sizeof(*obj)); | |
816 | if (status) | |
817 | return status; | |
818 | *obj = ntohl(raw); | |
819 | return 0; | |
820 | } | |
821 | ||
822 | /* It would be nice if this bit of code could be shared with the client. | |
823 | * Obstacles: | |
824 | * The client shouldn't malloc(), would have to pass in own memory. | |
825 | * The server uses base of head iovec as read pointer, while the | |
826 | * client uses separate pointer. */ | |
827 | static int | |
828 | unwrap_integ_data(struct xdr_buf *buf, u32 seq, struct gss_ctx *ctx) | |
829 | { | |
830 | int stat = -EINVAL; | |
831 | u32 integ_len, maj_stat; | |
832 | struct xdr_netobj mic; | |
833 | struct xdr_buf integ_buf; | |
834 | ||
76994313 | 835 | integ_len = svc_getnl(&buf->head[0]); |
1da177e4 | 836 | if (integ_len & 3) |
b797b5be | 837 | return stat; |
1da177e4 | 838 | if (integ_len > buf->len) |
b797b5be | 839 | return stat; |
1da177e4 LT |
840 | if (xdr_buf_subsegment(buf, &integ_buf, 0, integ_len)) |
841 | BUG(); | |
842 | /* copy out mic... */ | |
843 | if (read_u32_from_xdr_buf(buf, integ_len, &mic.len)) | |
844 | BUG(); | |
845 | if (mic.len > RPC_MAX_AUTH_SIZE) | |
b797b5be | 846 | return stat; |
1da177e4 LT |
847 | mic.data = kmalloc(mic.len, GFP_KERNEL); |
848 | if (!mic.data) | |
b797b5be | 849 | return stat; |
1da177e4 LT |
850 | if (read_bytes_from_xdr_buf(buf, integ_len + 4, mic.data, mic.len)) |
851 | goto out; | |
00fd6e14 | 852 | maj_stat = gss_verify_mic(ctx, &integ_buf, &mic); |
1da177e4 LT |
853 | if (maj_stat != GSS_S_COMPLETE) |
854 | goto out; | |
76994313 | 855 | if (svc_getnl(&buf->head[0]) != seq) |
1da177e4 LT |
856 | goto out; |
857 | stat = 0; | |
858 | out: | |
b797b5be | 859 | kfree(mic.data); |
1da177e4 LT |
860 | return stat; |
861 | } | |
862 | ||
7c9fdcfb BF |
863 | static inline int |
864 | total_buf_len(struct xdr_buf *buf) | |
865 | { | |
866 | return buf->head[0].iov_len + buf->page_len + buf->tail[0].iov_len; | |
867 | } | |
868 | ||
869 | static void | |
870 | fix_priv_head(struct xdr_buf *buf, int pad) | |
871 | { | |
872 | if (buf->page_len == 0) { | |
873 | /* We need to adjust head and buf->len in tandem in this | |
874 | * case to make svc_defer() work--it finds the original | |
875 | * buffer start using buf->len - buf->head[0].iov_len. */ | |
876 | buf->head[0].iov_len -= pad; | |
877 | } | |
878 | } | |
879 | ||
880 | static int | |
881 | unwrap_priv_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gss_ctx *ctx) | |
882 | { | |
883 | u32 priv_len, maj_stat; | |
884 | int pad, saved_len, remaining_len, offset; | |
885 | ||
cf8208d0 | 886 | rqstp->rq_splice_ok = 0; |
7c9fdcfb | 887 | |
76994313 | 888 | priv_len = svc_getnl(&buf->head[0]); |
7c9fdcfb BF |
889 | if (rqstp->rq_deferred) { |
890 | /* Already decrypted last time through! The sequence number | |
891 | * check at out_seq is unnecessary but harmless: */ | |
892 | goto out_seq; | |
893 | } | |
894 | /* buf->len is the number of bytes from the original start of the | |
895 | * request to the end, where head[0].iov_len is just the bytes | |
896 | * not yet read from the head, so these two values are different: */ | |
897 | remaining_len = total_buf_len(buf); | |
898 | if (priv_len > remaining_len) | |
899 | return -EINVAL; | |
900 | pad = remaining_len - priv_len; | |
901 | buf->len -= pad; | |
902 | fix_priv_head(buf, pad); | |
903 | ||
904 | /* Maybe it would be better to give gss_unwrap a length parameter: */ | |
905 | saved_len = buf->len; | |
906 | buf->len = priv_len; | |
907 | maj_stat = gss_unwrap(ctx, 0, buf); | |
908 | pad = priv_len - buf->len; | |
909 | buf->len = saved_len; | |
910 | buf->len -= pad; | |
911 | /* The upper layers assume the buffer is aligned on 4-byte boundaries. | |
912 | * In the krb5p case, at least, the data ends up offset, so we need to | |
913 | * move it around. */ | |
914 | /* XXX: This is very inefficient. It would be better to either do | |
915 | * this while we encrypt, or maybe in the receive code, if we can peak | |
916 | * ahead and work out the service and mechanism there. */ | |
917 | offset = buf->head[0].iov_len % 4; | |
918 | if (offset) { | |
919 | buf->buflen = RPCSVC_MAXPAYLOAD; | |
920 | xdr_shift_buf(buf, offset); | |
921 | fix_priv_head(buf, pad); | |
922 | } | |
923 | if (maj_stat != GSS_S_COMPLETE) | |
924 | return -EINVAL; | |
925 | out_seq: | |
76994313 | 926 | if (svc_getnl(&buf->head[0]) != seq) |
7c9fdcfb BF |
927 | return -EINVAL; |
928 | return 0; | |
929 | } | |
930 | ||
1da177e4 LT |
931 | struct gss_svc_data { |
932 | /* decoded gss client cred: */ | |
933 | struct rpc_gss_wire_cred clcred; | |
5b304bc5 BF |
934 | /* save a pointer to the beginning of the encoded verifier, |
935 | * for use in encryption/checksumming in svcauth_gss_release: */ | |
936 | __be32 *verf_start; | |
1da177e4 LT |
937 | struct rsc *rsci; |
938 | }; | |
939 | ||
940 | static int | |
941 | svcauth_gss_set_client(struct svc_rqst *rqstp) | |
942 | { | |
943 | struct gss_svc_data *svcdata = rqstp->rq_auth_data; | |
944 | struct rsc *rsci = svcdata->rsci; | |
945 | struct rpc_gss_wire_cred *gc = &svcdata->clcred; | |
3ab4d8b1 | 946 | int stat; |
1da177e4 | 947 | |
3ab4d8b1 BF |
948 | /* |
949 | * A gss export can be specified either by: | |
950 | * export *(sec=krb5,rw) | |
951 | * or by | |
952 | * export gss/krb5(rw) | |
953 | * The latter is deprecated; but for backwards compatibility reasons | |
954 | * the nfsd code will still fall back on trying it if the former | |
955 | * doesn't work; so we try to make both available to nfsd, below. | |
956 | */ | |
957 | rqstp->rq_gssclient = find_gss_auth_domain(rsci->mechctx, gc->gc_svc); | |
958 | if (rqstp->rq_gssclient == NULL) | |
1da177e4 | 959 | return SVC_DENIED; |
3ab4d8b1 | 960 | stat = svcauth_unix_set_client(rqstp); |
1ebede86 | 961 | if (stat == SVC_DROP || stat == SVC_CLOSE) |
3ab4d8b1 | 962 | return stat; |
1da177e4 LT |
963 | return SVC_OK; |
964 | } | |
965 | ||
91a4762e | 966 | static inline int |
fc2952a2 SS |
967 | gss_write_init_verf(struct cache_detail *cd, struct svc_rqst *rqstp, |
968 | struct xdr_netobj *out_handle, int *major_status) | |
91a4762e KC |
969 | { |
970 | struct rsc *rsci; | |
54f9247b | 971 | int rc; |
91a4762e | 972 | |
fc2952a2 | 973 | if (*major_status != GSS_S_COMPLETE) |
91a4762e | 974 | return gss_write_null_verf(rqstp); |
fc2952a2 | 975 | rsci = gss_svc_searchbyctx(cd, out_handle); |
91a4762e | 976 | if (rsci == NULL) { |
fc2952a2 | 977 | *major_status = GSS_S_NO_CONTEXT; |
91a4762e KC |
978 | return gss_write_null_verf(rqstp); |
979 | } | |
54f9247b | 980 | rc = gss_write_verf(rqstp, rsci->mechctx, GSS_SEQ_WIN); |
a1db410d | 981 | cache_put(&rsci->h, cd); |
54f9247b | 982 | return rc; |
91a4762e KC |
983 | } |
984 | ||
fc2952a2 SS |
985 | static inline int |
986 | gss_read_verf(struct rpc_gss_wire_cred *gc, | |
987 | struct kvec *argv, __be32 *authp, | |
988 | struct xdr_netobj *in_handle, | |
989 | struct xdr_netobj *in_token) | |
21fcd02b | 990 | { |
21fcd02b | 991 | struct xdr_netobj tmpobj; |
21fcd02b BF |
992 | |
993 | /* Read the verifier; should be NULL: */ | |
994 | *authp = rpc_autherr_badverf; | |
995 | if (argv->iov_len < 2 * 4) | |
996 | return SVC_DENIED; | |
997 | if (svc_getnl(argv) != RPC_AUTH_NULL) | |
998 | return SVC_DENIED; | |
999 | if (svc_getnl(argv) != 0) | |
1000 | return SVC_DENIED; | |
21fcd02b BF |
1001 | /* Martial context handle and token for upcall: */ |
1002 | *authp = rpc_autherr_badcred; | |
1003 | if (gc->gc_proc == RPC_GSS_PROC_INIT && gc->gc_ctx.len != 0) | |
1004 | return SVC_DENIED; | |
fc2952a2 | 1005 | if (dup_netobj(in_handle, &gc->gc_ctx)) |
1ebede86 | 1006 | return SVC_CLOSE; |
21fcd02b BF |
1007 | *authp = rpc_autherr_badverf; |
1008 | if (svc_safe_getnetobj(argv, &tmpobj)) { | |
fc2952a2 | 1009 | kfree(in_handle->data); |
21fcd02b BF |
1010 | return SVC_DENIED; |
1011 | } | |
fc2952a2 SS |
1012 | if (dup_netobj(in_token, &tmpobj)) { |
1013 | kfree(in_handle->data); | |
1ebede86 | 1014 | return SVC_CLOSE; |
21fcd02b BF |
1015 | } |
1016 | ||
fc2952a2 SS |
1017 | return 0; |
1018 | } | |
1019 | ||
1020 | static inline int | |
1021 | gss_write_resv(struct kvec *resv, size_t size_limit, | |
1022 | struct xdr_netobj *out_handle, struct xdr_netobj *out_token, | |
1023 | int major_status, int minor_status) | |
1024 | { | |
1025 | if (resv->iov_len + 4 > size_limit) | |
1026 | return -1; | |
1027 | svc_putnl(resv, RPC_SUCCESS); | |
1028 | if (svc_safe_putnetobj(resv, out_handle)) | |
1029 | return -1; | |
1030 | if (resv->iov_len + 3 * 4 > size_limit) | |
1031 | return -1; | |
1032 | svc_putnl(resv, major_status); | |
1033 | svc_putnl(resv, minor_status); | |
1034 | svc_putnl(resv, GSS_SEQ_WIN); | |
1035 | if (svc_safe_putnetobj(resv, out_token)) | |
1036 | return -1; | |
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * Having read the cred already and found we're in the context | |
1042 | * initiation case, read the verifier and initiate (or check the results | |
1043 | * of) upcalls to userspace for help with context initiation. If | |
1044 | * the upcall results are available, write the verifier and result. | |
1045 | * Otherwise, drop the request pending an answer to the upcall. | |
1046 | */ | |
1047 | static int svcauth_gss_handle_init(struct svc_rqst *rqstp, | |
1048 | struct rpc_gss_wire_cred *gc, __be32 *authp) | |
1049 | { | |
1050 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
1051 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
1052 | struct rsi *rsip, rsikey; | |
1053 | int ret; | |
1054 | struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, sunrpc_net_id); | |
1055 | ||
1056 | memset(&rsikey, 0, sizeof(rsikey)); | |
1057 | ret = gss_read_verf(gc, argv, authp, | |
1058 | &rsikey.in_handle, &rsikey.in_token); | |
1059 | if (ret) | |
1060 | return ret; | |
1061 | ||
21fcd02b | 1062 | /* Perform upcall, or find upcall result: */ |
a1db410d | 1063 | rsip = rsi_lookup(sn->rsi_cache, &rsikey); |
21fcd02b BF |
1064 | rsi_free(&rsikey); |
1065 | if (!rsip) | |
1ebede86 | 1066 | return SVC_CLOSE; |
a1db410d | 1067 | if (cache_check(sn->rsi_cache, &rsip->h, &rqstp->rq_chandle) < 0) |
21fcd02b | 1068 | /* No upcall result: */ |
1ebede86 | 1069 | return SVC_CLOSE; |
2ed5282c N |
1070 | |
1071 | ret = SVC_CLOSE; | |
1072 | /* Got an answer to the upcall; use it: */ | |
fc2952a2 SS |
1073 | if (gss_write_init_verf(sn->rsc_cache, rqstp, |
1074 | &rsip->out_handle, &rsip->major_status)) | |
2ed5282c | 1075 | goto out; |
fc2952a2 SS |
1076 | if (gss_write_resv(resv, PAGE_SIZE, |
1077 | &rsip->out_handle, &rsip->out_token, | |
1078 | rsip->major_status, rsip->minor_status)) | |
2ed5282c N |
1079 | goto out; |
1080 | ||
980e5a40 BF |
1081 | ret = SVC_COMPLETE; |
1082 | out: | |
a1db410d | 1083 | cache_put(&rsip->h, sn->rsi_cache); |
980e5a40 | 1084 | return ret; |
21fcd02b BF |
1085 | } |
1086 | ||
1da177e4 LT |
1087 | /* |
1088 | * Accept an rpcsec packet. | |
1089 | * If context establishment, punt to user space | |
1090 | * If data exchange, verify/decrypt | |
1091 | * If context destruction, handle here | |
1092 | * In the context establishment and destruction case we encode | |
1093 | * response here and return SVC_COMPLETE. | |
1094 | */ | |
1095 | static int | |
d8ed029d | 1096 | svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp) |
1da177e4 LT |
1097 | { |
1098 | struct kvec *argv = &rqstp->rq_arg.head[0]; | |
1099 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
1100 | u32 crlen; | |
1da177e4 LT |
1101 | struct gss_svc_data *svcdata = rqstp->rq_auth_data; |
1102 | struct rpc_gss_wire_cred *gc; | |
1103 | struct rsc *rsci = NULL; | |
d8ed029d AD |
1104 | __be32 *rpcstart; |
1105 | __be32 *reject_stat = resv->iov_base + resv->iov_len; | |
1da177e4 | 1106 | int ret; |
a1db410d | 1107 | struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, sunrpc_net_id); |
1da177e4 | 1108 | |
8885cb36 CL |
1109 | dprintk("RPC: svcauth_gss: argv->iov_len = %zd\n", |
1110 | argv->iov_len); | |
1da177e4 LT |
1111 | |
1112 | *authp = rpc_autherr_badcred; | |
1113 | if (!svcdata) | |
1114 | svcdata = kmalloc(sizeof(*svcdata), GFP_KERNEL); | |
1115 | if (!svcdata) | |
1116 | goto auth_err; | |
1117 | rqstp->rq_auth_data = svcdata; | |
5b304bc5 | 1118 | svcdata->verf_start = NULL; |
1da177e4 LT |
1119 | svcdata->rsci = NULL; |
1120 | gc = &svcdata->clcred; | |
1121 | ||
1122 | /* start of rpc packet is 7 u32's back from here: | |
1123 | * xid direction rpcversion prog vers proc flavour | |
1124 | */ | |
1125 | rpcstart = argv->iov_base; | |
1126 | rpcstart -= 7; | |
1127 | ||
1128 | /* credential is: | |
1129 | * version(==1), proc(0,1,2,3), seq, service (1,2,3), handle | |
25985edc | 1130 | * at least 5 u32s, and is preceded by length, so that makes 6. |
1da177e4 LT |
1131 | */ |
1132 | ||
1133 | if (argv->iov_len < 5 * 4) | |
1134 | goto auth_err; | |
76994313 AD |
1135 | crlen = svc_getnl(argv); |
1136 | if (svc_getnl(argv) != RPC_GSS_VERSION) | |
1da177e4 | 1137 | goto auth_err; |
76994313 AD |
1138 | gc->gc_proc = svc_getnl(argv); |
1139 | gc->gc_seq = svc_getnl(argv); | |
1140 | gc->gc_svc = svc_getnl(argv); | |
1da177e4 LT |
1141 | if (svc_safe_getnetobj(argv, &gc->gc_ctx)) |
1142 | goto auth_err; | |
1143 | if (crlen != round_up_to_quad(gc->gc_ctx.len) + 5 * 4) | |
1144 | goto auth_err; | |
1145 | ||
1146 | if ((gc->gc_proc != RPC_GSS_PROC_DATA) && (rqstp->rq_proc != 0)) | |
1147 | goto auth_err; | |
1148 | ||
1da177e4 LT |
1149 | *authp = rpc_autherr_badverf; |
1150 | switch (gc->gc_proc) { | |
1151 | case RPC_GSS_PROC_INIT: | |
1152 | case RPC_GSS_PROC_CONTINUE_INIT: | |
21fcd02b | 1153 | return svcauth_gss_handle_init(rqstp, gc, authp); |
1da177e4 LT |
1154 | case RPC_GSS_PROC_DATA: |
1155 | case RPC_GSS_PROC_DESTROY: | |
21fcd02b | 1156 | /* Look up the context, and check the verifier: */ |
1da177e4 | 1157 | *authp = rpcsec_gsserr_credproblem; |
a1db410d | 1158 | rsci = gss_svc_searchbyctx(sn->rsc_cache, &gc->gc_ctx); |
1da177e4 LT |
1159 | if (!rsci) |
1160 | goto auth_err; | |
1161 | switch (gss_verify_header(rqstp, rsci, rpcstart, gc, authp)) { | |
1162 | case SVC_OK: | |
1163 | break; | |
1164 | case SVC_DENIED: | |
1165 | goto auth_err; | |
1166 | case SVC_DROP: | |
1167 | goto drop; | |
1168 | } | |
1169 | break; | |
1170 | default: | |
1171 | *authp = rpc_autherr_rejectedcred; | |
1172 | goto auth_err; | |
1173 | } | |
1174 | ||
1175 | /* now act upon the command: */ | |
1176 | switch (gc->gc_proc) { | |
1da177e4 | 1177 | case RPC_GSS_PROC_DESTROY: |
c5e434c9 WY |
1178 | if (gss_write_verf(rqstp, rsci->mechctx, gc->gc_seq)) |
1179 | goto auth_err; | |
cb5c7d66 | 1180 | rsci->h.expiry_time = get_seconds(); |
1da177e4 LT |
1181 | set_bit(CACHE_NEGATIVE, &rsci->h.flags); |
1182 | if (resv->iov_len + 4 > PAGE_SIZE) | |
1183 | goto drop; | |
76994313 | 1184 | svc_putnl(resv, RPC_SUCCESS); |
1da177e4 LT |
1185 | goto complete; |
1186 | case RPC_GSS_PROC_DATA: | |
1187 | *authp = rpcsec_gsserr_ctxproblem; | |
5b304bc5 | 1188 | svcdata->verf_start = resv->iov_base + resv->iov_len; |
1da177e4 LT |
1189 | if (gss_write_verf(rqstp, rsci->mechctx, gc->gc_seq)) |
1190 | goto auth_err; | |
1191 | rqstp->rq_cred = rsci->cred; | |
1192 | get_group_info(rsci->cred.cr_group_info); | |
1193 | *authp = rpc_autherr_badcred; | |
1194 | switch (gc->gc_svc) { | |
1195 | case RPC_GSS_SVC_NONE: | |
1196 | break; | |
1197 | case RPC_GSS_SVC_INTEGRITY: | |
b620754b BF |
1198 | /* placeholders for length and seq. number: */ |
1199 | svc_putnl(resv, 0); | |
1200 | svc_putnl(resv, 0); | |
1da177e4 LT |
1201 | if (unwrap_integ_data(&rqstp->rq_arg, |
1202 | gc->gc_seq, rsci->mechctx)) | |
dd35210e | 1203 | goto garbage_args; |
b620754b BF |
1204 | break; |
1205 | case RPC_GSS_SVC_PRIVACY: | |
1da177e4 | 1206 | /* placeholders for length and seq. number: */ |
76994313 AD |
1207 | svc_putnl(resv, 0); |
1208 | svc_putnl(resv, 0); | |
7c9fdcfb BF |
1209 | if (unwrap_priv_data(rqstp, &rqstp->rq_arg, |
1210 | gc->gc_seq, rsci->mechctx)) | |
dd35210e | 1211 | goto garbage_args; |
7c9fdcfb | 1212 | break; |
1da177e4 LT |
1213 | default: |
1214 | goto auth_err; | |
1215 | } | |
1216 | svcdata->rsci = rsci; | |
1217 | cache_get(&rsci->h); | |
d5497fc6 | 1218 | rqstp->rq_cred.cr_flavor = gss_svc_to_pseudoflavor( |
c4170583 | 1219 | rsci->mechctx->mech_type, gc->gc_svc); |
1da177e4 LT |
1220 | ret = SVC_OK; |
1221 | goto out; | |
1222 | } | |
dd35210e | 1223 | garbage_args: |
dd35210e HJ |
1224 | ret = SVC_GARBAGE; |
1225 | goto out; | |
1da177e4 | 1226 | auth_err: |
21fcd02b | 1227 | /* Restore write pointer to its original value: */ |
1da177e4 LT |
1228 | xdr_ressize_check(rqstp, reject_stat); |
1229 | ret = SVC_DENIED; | |
1230 | goto out; | |
1231 | complete: | |
1232 | ret = SVC_COMPLETE; | |
1233 | goto out; | |
1234 | drop: | |
1235 | ret = SVC_DROP; | |
1236 | out: | |
1237 | if (rsci) | |
a1db410d | 1238 | cache_put(&rsci->h, sn->rsc_cache); |
1da177e4 LT |
1239 | return ret; |
1240 | } | |
1241 | ||
cfbdbab0 | 1242 | static __be32 * |
3c15a486 BF |
1243 | svcauth_gss_prepare_to_wrap(struct xdr_buf *resbuf, struct gss_svc_data *gsd) |
1244 | { | |
cfbdbab0 AV |
1245 | __be32 *p; |
1246 | u32 verf_len; | |
3c15a486 | 1247 | |
5b304bc5 BF |
1248 | p = gsd->verf_start; |
1249 | gsd->verf_start = NULL; | |
1250 | ||
1251 | /* If the reply stat is nonzero, don't wrap: */ | |
1252 | if (*(p-1) != rpc_success) | |
1253 | return NULL; | |
1254 | /* Skip the verifier: */ | |
1255 | p += 1; | |
1256 | verf_len = ntohl(*p++); | |
1257 | p += XDR_QUADLEN(verf_len); | |
3c15a486 BF |
1258 | /* move accept_stat to right place: */ |
1259 | memcpy(p, p + 2, 4); | |
5b304bc5 | 1260 | /* Also don't wrap if the accept stat is nonzero: */ |
3c15a486 BF |
1261 | if (*p != rpc_success) { |
1262 | resbuf->head[0].iov_len -= 2 * 4; | |
1263 | return NULL; | |
1264 | } | |
1265 | p++; | |
1266 | return p; | |
1267 | } | |
1268 | ||
e142ede8 BF |
1269 | static inline int |
1270 | svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp) | |
1da177e4 LT |
1271 | { |
1272 | struct gss_svc_data *gsd = (struct gss_svc_data *)rqstp->rq_auth_data; | |
1273 | struct rpc_gss_wire_cred *gc = &gsd->clcred; | |
1274 | struct xdr_buf *resbuf = &rqstp->rq_res; | |
1275 | struct xdr_buf integ_buf; | |
1276 | struct xdr_netobj mic; | |
1277 | struct kvec *resv; | |
d8ed029d | 1278 | __be32 *p; |
1da177e4 LT |
1279 | int integ_offset, integ_len; |
1280 | int stat = -EINVAL; | |
1281 | ||
3c15a486 BF |
1282 | p = svcauth_gss_prepare_to_wrap(resbuf, gsd); |
1283 | if (p == NULL) | |
e142ede8 | 1284 | goto out; |
e142ede8 BF |
1285 | integ_offset = (u8 *)(p + 1) - (u8 *)resbuf->head[0].iov_base; |
1286 | integ_len = resbuf->len - integ_offset; | |
1287 | BUG_ON(integ_len % 4); | |
1288 | *p++ = htonl(integ_len); | |
1289 | *p++ = htonl(gc->gc_seq); | |
1290 | if (xdr_buf_subsegment(resbuf, &integ_buf, integ_offset, | |
1291 | integ_len)) | |
1292 | BUG(); | |
153e44d2 | 1293 | if (resbuf->tail[0].iov_base == NULL) { |
e142ede8 BF |
1294 | if (resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE > PAGE_SIZE) |
1295 | goto out_err; | |
1296 | resbuf->tail[0].iov_base = resbuf->head[0].iov_base | |
1297 | + resbuf->head[0].iov_len; | |
1298 | resbuf->tail[0].iov_len = 0; | |
e142ede8 BF |
1299 | resv = &resbuf->tail[0]; |
1300 | } else { | |
1301 | resv = &resbuf->tail[0]; | |
1302 | } | |
1303 | mic.data = (u8 *)resv->iov_base + resv->iov_len + 4; | |
1304 | if (gss_get_mic(gsd->rsci->mechctx, &integ_buf, &mic)) | |
1305 | goto out_err; | |
76994313 | 1306 | svc_putnl(resv, mic.len); |
e142ede8 BF |
1307 | memset(mic.data + mic.len, 0, |
1308 | round_up_to_quad(mic.len) - mic.len); | |
1309 | resv->iov_len += XDR_QUADLEN(mic.len) << 2; | |
1310 | /* not strictly required: */ | |
1311 | resbuf->len += XDR_QUADLEN(mic.len) << 2; | |
1312 | BUG_ON(resv->iov_len > PAGE_SIZE); | |
1313 | out: | |
1314 | stat = 0; | |
1315 | out_err: | |
1316 | return stat; | |
1317 | } | |
1318 | ||
7c9fdcfb BF |
1319 | static inline int |
1320 | svcauth_gss_wrap_resp_priv(struct svc_rqst *rqstp) | |
1321 | { | |
1322 | struct gss_svc_data *gsd = (struct gss_svc_data *)rqstp->rq_auth_data; | |
1323 | struct rpc_gss_wire_cred *gc = &gsd->clcred; | |
1324 | struct xdr_buf *resbuf = &rqstp->rq_res; | |
1325 | struct page **inpages = NULL; | |
753ed90d AV |
1326 | __be32 *p, *len; |
1327 | int offset; | |
7c9fdcfb BF |
1328 | int pad; |
1329 | ||
3c15a486 BF |
1330 | p = svcauth_gss_prepare_to_wrap(resbuf, gsd); |
1331 | if (p == NULL) | |
7c9fdcfb | 1332 | return 0; |
7c9fdcfb BF |
1333 | len = p++; |
1334 | offset = (u8 *)p - (u8 *)resbuf->head[0].iov_base; | |
1335 | *p++ = htonl(gc->gc_seq); | |
1336 | inpages = resbuf->pages; | |
1337 | /* XXX: Would be better to write some xdr helper functions for | |
1338 | * nfs{2,3,4}xdr.c that place the data right, instead of copying: */ | |
7561042f KC |
1339 | |
1340 | /* | |
1341 | * If there is currently tail data, make sure there is | |
1342 | * room for the head, tail, and 2 * RPC_MAX_AUTH_SIZE in | |
1343 | * the page, and move the current tail data such that | |
1344 | * there is RPC_MAX_AUTH_SIZE slack space available in | |
1345 | * both the head and tail. | |
1346 | */ | |
44524359 | 1347 | if (resbuf->tail[0].iov_base) { |
7c9fdcfb BF |
1348 | BUG_ON(resbuf->tail[0].iov_base >= resbuf->head[0].iov_base |
1349 | + PAGE_SIZE); | |
1350 | BUG_ON(resbuf->tail[0].iov_base < resbuf->head[0].iov_base); | |
1351 | if (resbuf->tail[0].iov_len + resbuf->head[0].iov_len | |
1352 | + 2 * RPC_MAX_AUTH_SIZE > PAGE_SIZE) | |
1353 | return -ENOMEM; | |
1354 | memmove(resbuf->tail[0].iov_base + RPC_MAX_AUTH_SIZE, | |
1355 | resbuf->tail[0].iov_base, | |
1356 | resbuf->tail[0].iov_len); | |
1357 | resbuf->tail[0].iov_base += RPC_MAX_AUTH_SIZE; | |
1358 | } | |
7561042f KC |
1359 | /* |
1360 | * If there is no current tail data, make sure there is | |
1361 | * room for the head data, and 2 * RPC_MAX_AUTH_SIZE in the | |
1362 | * allotted page, and set up tail information such that there | |
1363 | * is RPC_MAX_AUTH_SIZE slack space available in both the | |
1364 | * head and tail. | |
1365 | */ | |
7c9fdcfb BF |
1366 | if (resbuf->tail[0].iov_base == NULL) { |
1367 | if (resbuf->head[0].iov_len + 2*RPC_MAX_AUTH_SIZE > PAGE_SIZE) | |
1368 | return -ENOMEM; | |
1369 | resbuf->tail[0].iov_base = resbuf->head[0].iov_base | |
1370 | + resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE; | |
1371 | resbuf->tail[0].iov_len = 0; | |
7c9fdcfb BF |
1372 | } |
1373 | if (gss_wrap(gsd->rsci->mechctx, offset, resbuf, inpages)) | |
1374 | return -ENOMEM; | |
1375 | *len = htonl(resbuf->len - offset); | |
1376 | pad = 3 - ((resbuf->len - offset - 1)&3); | |
d8ed029d | 1377 | p = (__be32 *)(resbuf->tail[0].iov_base + resbuf->tail[0].iov_len); |
7c9fdcfb BF |
1378 | memset(p, 0, pad); |
1379 | resbuf->tail[0].iov_len += pad; | |
1380 | resbuf->len += pad; | |
1381 | return 0; | |
1382 | } | |
1383 | ||
e142ede8 BF |
1384 | static int |
1385 | svcauth_gss_release(struct svc_rqst *rqstp) | |
1386 | { | |
1387 | struct gss_svc_data *gsd = (struct gss_svc_data *)rqstp->rq_auth_data; | |
1388 | struct rpc_gss_wire_cred *gc = &gsd->clcred; | |
1389 | struct xdr_buf *resbuf = &rqstp->rq_res; | |
1390 | int stat = -EINVAL; | |
a1db410d | 1391 | struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, sunrpc_net_id); |
e142ede8 | 1392 | |
1da177e4 LT |
1393 | if (gc->gc_proc != RPC_GSS_PROC_DATA) |
1394 | goto out; | |
1395 | /* Release can be called twice, but we only wrap once. */ | |
5b304bc5 | 1396 | if (gsd->verf_start == NULL) |
1da177e4 LT |
1397 | goto out; |
1398 | /* normally not set till svc_send, but we need it here: */ | |
7c9fdcfb BF |
1399 | /* XXX: what for? Do we mess it up the moment we call svc_putu32 |
1400 | * or whatever? */ | |
1401 | resbuf->len = total_buf_len(resbuf); | |
1da177e4 LT |
1402 | switch (gc->gc_svc) { |
1403 | case RPC_GSS_SVC_NONE: | |
1404 | break; | |
1405 | case RPC_GSS_SVC_INTEGRITY: | |
7c9fdcfb BF |
1406 | stat = svcauth_gss_wrap_resp_integ(rqstp); |
1407 | if (stat) | |
1408 | goto out_err; | |
1da177e4 LT |
1409 | break; |
1410 | case RPC_GSS_SVC_PRIVACY: | |
7c9fdcfb BF |
1411 | stat = svcauth_gss_wrap_resp_priv(rqstp); |
1412 | if (stat) | |
1413 | goto out_err; | |
1414 | break; | |
eac81736 WY |
1415 | /* |
1416 | * For any other gc_svc value, svcauth_gss_accept() already set | |
1417 | * the auth_error appropriately; just fall through: | |
1418 | */ | |
1da177e4 LT |
1419 | } |
1420 | ||
1421 | out: | |
1422 | stat = 0; | |
1423 | out_err: | |
1424 | if (rqstp->rq_client) | |
1425 | auth_domain_put(rqstp->rq_client); | |
1426 | rqstp->rq_client = NULL; | |
3ab4d8b1 BF |
1427 | if (rqstp->rq_gssclient) |
1428 | auth_domain_put(rqstp->rq_gssclient); | |
1429 | rqstp->rq_gssclient = NULL; | |
1da177e4 LT |
1430 | if (rqstp->rq_cred.cr_group_info) |
1431 | put_group_info(rqstp->rq_cred.cr_group_info); | |
1432 | rqstp->rq_cred.cr_group_info = NULL; | |
1433 | if (gsd->rsci) | |
a1db410d | 1434 | cache_put(&gsd->rsci->h, sn->rsc_cache); |
1da177e4 LT |
1435 | gsd->rsci = NULL; |
1436 | ||
1437 | return stat; | |
1438 | } | |
1439 | ||
1440 | static void | |
1441 | svcauth_gss_domain_release(struct auth_domain *dom) | |
1442 | { | |
1443 | struct gss_domain *gd = container_of(dom, struct gss_domain, h); | |
1444 | ||
1445 | kfree(dom->name); | |
1446 | kfree(gd); | |
1447 | } | |
1448 | ||
1449 | static struct auth_ops svcauthops_gss = { | |
1450 | .name = "rpcsec_gss", | |
1451 | .owner = THIS_MODULE, | |
1452 | .flavour = RPC_AUTH_GSS, | |
1453 | .accept = svcauth_gss_accept, | |
1454 | .release = svcauth_gss_release, | |
1455 | .domain_release = svcauth_gss_domain_release, | |
1456 | .set_client = svcauth_gss_set_client, | |
1457 | }; | |
1458 | ||
a1db410d SK |
1459 | static int rsi_cache_create_net(struct net *net) |
1460 | { | |
1461 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1462 | struct cache_detail *cd; | |
1463 | int err; | |
1464 | ||
1465 | cd = cache_create_net(&rsi_cache_template, net); | |
1466 | if (IS_ERR(cd)) | |
1467 | return PTR_ERR(cd); | |
1468 | err = cache_register_net(cd, net); | |
1469 | if (err) { | |
1470 | cache_destroy_net(cd, net); | |
1471 | return err; | |
1472 | } | |
1473 | sn->rsi_cache = cd; | |
1474 | return 0; | |
1475 | } | |
1476 | ||
1477 | static void rsi_cache_destroy_net(struct net *net) | |
1478 | { | |
1479 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1480 | struct cache_detail *cd = sn->rsi_cache; | |
1481 | ||
1482 | sn->rsi_cache = NULL; | |
1483 | cache_purge(cd); | |
1484 | cache_unregister_net(cd, net); | |
1485 | cache_destroy_net(cd, net); | |
1486 | } | |
1487 | ||
1488 | static int rsc_cache_create_net(struct net *net) | |
1489 | { | |
1490 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1491 | struct cache_detail *cd; | |
1492 | int err; | |
1493 | ||
1494 | cd = cache_create_net(&rsc_cache_template, net); | |
1495 | if (IS_ERR(cd)) | |
1496 | return PTR_ERR(cd); | |
1497 | err = cache_register_net(cd, net); | |
1498 | if (err) { | |
1499 | cache_destroy_net(cd, net); | |
1500 | return err; | |
1501 | } | |
1502 | sn->rsc_cache = cd; | |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | static void rsc_cache_destroy_net(struct net *net) | |
1507 | { | |
1508 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1509 | struct cache_detail *cd = sn->rsc_cache; | |
1510 | ||
1511 | sn->rsc_cache = NULL; | |
1512 | cache_purge(cd); | |
1513 | cache_unregister_net(cd, net); | |
1514 | cache_destroy_net(cd, net); | |
1515 | } | |
1516 | ||
1da177e4 | 1517 | int |
a1db410d | 1518 | gss_svc_init_net(struct net *net) |
1da177e4 | 1519 | { |
a1db410d SK |
1520 | int rv; |
1521 | ||
1522 | rv = rsc_cache_create_net(net); | |
dbf847ec BF |
1523 | if (rv) |
1524 | return rv; | |
a1db410d | 1525 | rv = rsi_cache_create_net(net); |
dbf847ec BF |
1526 | if (rv) |
1527 | goto out1; | |
dbf847ec | 1528 | return 0; |
dbf847ec | 1529 | out1: |
a1db410d | 1530 | rsc_cache_destroy_net(net); |
1da177e4 LT |
1531 | return rv; |
1532 | } | |
1533 | ||
a1db410d SK |
1534 | void |
1535 | gss_svc_shutdown_net(struct net *net) | |
1536 | { | |
1537 | rsi_cache_destroy_net(net); | |
1538 | rsc_cache_destroy_net(net); | |
1539 | } | |
1540 | ||
1541 | int | |
1542 | gss_svc_init(void) | |
1543 | { | |
1544 | return svc_auth_register(RPC_AUTH_GSS, &svcauthops_gss); | |
1545 | } | |
1546 | ||
1da177e4 LT |
1547 | void |
1548 | gss_svc_shutdown(void) | |
1549 | { | |
1da177e4 LT |
1550 | svc_auth_unregister(RPC_AUTH_GSS); |
1551 | } |