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>
7 * RPCSEC_GSS server authentication.
8 * This implements RPCSEC_GSS as defined in rfc2203 (rpcsec_gss) and rfc2078
11 * The RPCSEC_GSS involves three stages:
14 * 3/ context destruction
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
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.
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
36 * mechanism specific information, such as a key
40 #include <linux/slab.h>
41 #include <linux/types.h>
42 #include <linux/module.h>
43 #include <linux/pagemap.h>
44 #include <linux/user_namespace.h>
46 #include <linux/sunrpc/auth_gss.h>
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 #include "gss_rpc_upcall.h"
54 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
55 # define RPCDBG_FACILITY RPCDBG_AUTH
58 /* The rpcsec_init cache is used for mapping RPCSEC_GSS_{,CONT_}INIT requests
61 * Key is context handle (\x if empty) and gss_token.
62 * Content is major_status minor_status (integers) context_handle, reply_token.
66 static int netobj_equal(struct xdr_netobj *a, struct xdr_netobj *b)
68 return a->len == b->len && 0 == memcmp(a->data, b->data, a->len);
71 #define RSI_HASHBITS 6
72 #define RSI_HASHMAX (1<<RSI_HASHBITS)
76 struct xdr_netobj in_handle, in_token;
77 struct xdr_netobj out_handle, out_token;
78 int major_status, minor_status;
79 struct rcu_head rcu_head;
82 static struct rsi *rsi_update(struct cache_detail *cd, struct rsi *new, struct rsi *old);
83 static struct rsi *rsi_lookup(struct cache_detail *cd, struct rsi *item);
85 static void rsi_free(struct rsi *rsii)
87 kfree(rsii->in_handle.data);
88 kfree(rsii->in_token.data);
89 kfree(rsii->out_handle.data);
90 kfree(rsii->out_token.data);
93 static void rsi_free_rcu(struct rcu_head *head)
95 struct rsi *rsii = container_of(head, struct rsi, rcu_head);
101 static void rsi_put(struct kref *ref)
103 struct rsi *rsii = container_of(ref, struct rsi, h.ref);
105 call_rcu(&rsii->rcu_head, rsi_free_rcu);
108 static inline int rsi_hash(struct rsi *item)
110 return hash_mem(item->in_handle.data, item->in_handle.len, RSI_HASHBITS)
111 ^ hash_mem(item->in_token.data, item->in_token.len, RSI_HASHBITS);
114 static int rsi_match(struct cache_head *a, struct cache_head *b)
116 struct rsi *item = container_of(a, struct rsi, h);
117 struct rsi *tmp = container_of(b, struct rsi, h);
118 return netobj_equal(&item->in_handle, &tmp->in_handle) &&
119 netobj_equal(&item->in_token, &tmp->in_token);
122 static int dup_to_netobj(struct xdr_netobj *dst, char *src, int len)
125 dst->data = (len ? kmemdup(src, len, GFP_KERNEL) : NULL);
126 if (len && !dst->data)
131 static inline int dup_netobj(struct xdr_netobj *dst, struct xdr_netobj *src)
133 return dup_to_netobj(dst, src->data, src->len);
136 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
138 struct rsi *new = container_of(cnew, struct rsi, h);
139 struct rsi *item = container_of(citem, struct rsi, h);
141 new->out_handle.data = NULL;
142 new->out_handle.len = 0;
143 new->out_token.data = NULL;
144 new->out_token.len = 0;
145 new->in_handle.len = item->in_handle.len;
146 item->in_handle.len = 0;
147 new->in_token.len = item->in_token.len;
148 item->in_token.len = 0;
149 new->in_handle.data = item->in_handle.data;
150 item->in_handle.data = NULL;
151 new->in_token.data = item->in_token.data;
152 item->in_token.data = NULL;
155 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
157 struct rsi *new = container_of(cnew, struct rsi, h);
158 struct rsi *item = container_of(citem, struct rsi, h);
160 BUG_ON(new->out_handle.data || new->out_token.data);
161 new->out_handle.len = item->out_handle.len;
162 item->out_handle.len = 0;
163 new->out_token.len = item->out_token.len;
164 item->out_token.len = 0;
165 new->out_handle.data = item->out_handle.data;
166 item->out_handle.data = NULL;
167 new->out_token.data = item->out_token.data;
168 item->out_token.data = NULL;
170 new->major_status = item->major_status;
171 new->minor_status = item->minor_status;
174 static struct cache_head *rsi_alloc(void)
176 struct rsi *rsii = kmalloc(sizeof(*rsii), GFP_KERNEL);
183 static void rsi_request(struct cache_detail *cd,
184 struct cache_head *h,
185 char **bpp, int *blen)
187 struct rsi *rsii = container_of(h, struct rsi, h);
189 qword_addhex(bpp, blen, rsii->in_handle.data, rsii->in_handle.len);
190 qword_addhex(bpp, blen, rsii->in_token.data, rsii->in_token.len);
194 static int rsi_parse(struct cache_detail *cd,
195 char *mesg, int mlen)
197 /* context token expiry major minor context token */
201 struct rsi rsii, *rsip = NULL;
203 int status = -EINVAL;
205 memset(&rsii, 0, sizeof(rsii));
207 len = qword_get(&mesg, buf, mlen);
211 if (dup_to_netobj(&rsii.in_handle, buf, len))
215 len = qword_get(&mesg, buf, mlen);
220 if (dup_to_netobj(&rsii.in_token, buf, len))
223 rsip = rsi_lookup(cd, &rsii);
229 expiry = get_expiry(&mesg);
235 len = qword_get(&mesg, buf, mlen);
238 rsii.major_status = simple_strtoul(buf, &ep, 10);
241 len = qword_get(&mesg, buf, mlen);
244 rsii.minor_status = simple_strtoul(buf, &ep, 10);
249 len = qword_get(&mesg, buf, mlen);
253 if (dup_to_netobj(&rsii.out_handle, buf, len))
257 len = qword_get(&mesg, buf, mlen);
262 if (dup_to_netobj(&rsii.out_token, buf, len))
264 rsii.h.expiry_time = expiry;
265 rsip = rsi_update(cd, &rsii, rsip);
270 cache_put(&rsip->h, cd);
276 static const struct cache_detail rsi_cache_template = {
277 .owner = THIS_MODULE,
278 .hash_size = RSI_HASHMAX,
279 .name = "auth.rpcsec.init",
280 .cache_put = rsi_put,
281 .cache_request = rsi_request,
282 .cache_parse = rsi_parse,
285 .update = update_rsi,
289 static struct rsi *rsi_lookup(struct cache_detail *cd, struct rsi *item)
291 struct cache_head *ch;
292 int hash = rsi_hash(item);
294 ch = sunrpc_cache_lookup_rcu(cd, &item->h, hash);
296 return container_of(ch, struct rsi, h);
301 static struct rsi *rsi_update(struct cache_detail *cd, struct rsi *new, struct rsi *old)
303 struct cache_head *ch;
304 int hash = rsi_hash(new);
306 ch = sunrpc_cache_update(cd, &new->h,
309 return container_of(ch, struct rsi, h);
316 * The rpcsec_context cache is used to store a context that is
317 * used in data exchange.
318 * The key is a context handle. The content is:
319 * uid, gidlist, mechanism, service-set, mech-specific-data
322 #define RSC_HASHBITS 10
323 #define RSC_HASHMAX (1<<RSC_HASHBITS)
325 #define GSS_SEQ_WIN 128
327 struct gss_svc_seq_data {
328 /* highest seq number seen so far: */
330 /* for i such that sd_max-GSS_SEQ_WIN < i <= sd_max, the i-th bit of
331 * sd_win is nonzero iff sequence number i has been seen already: */
332 unsigned long sd_win[GSS_SEQ_WIN/BITS_PER_LONG];
338 struct xdr_netobj handle;
339 struct svc_cred cred;
340 struct gss_svc_seq_data seqdata;
341 struct gss_ctx *mechctx;
342 struct rcu_head rcu_head;
345 static struct rsc *rsc_update(struct cache_detail *cd, struct rsc *new, struct rsc *old);
346 static struct rsc *rsc_lookup(struct cache_detail *cd, struct rsc *item);
348 static void rsc_free(struct rsc *rsci)
350 kfree(rsci->handle.data);
352 gss_delete_sec_context(&rsci->mechctx);
353 free_svc_cred(&rsci->cred);
356 static void rsc_free_rcu(struct rcu_head *head)
358 struct rsc *rsci = container_of(head, struct rsc, rcu_head);
360 kfree(rsci->handle.data);
364 static void rsc_put(struct kref *ref)
366 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
369 gss_delete_sec_context(&rsci->mechctx);
370 free_svc_cred(&rsci->cred);
371 call_rcu(&rsci->rcu_head, rsc_free_rcu);
375 rsc_hash(struct rsc *rsci)
377 return hash_mem(rsci->handle.data, rsci->handle.len, RSC_HASHBITS);
381 rsc_match(struct cache_head *a, struct cache_head *b)
383 struct rsc *new = container_of(a, struct rsc, h);
384 struct rsc *tmp = container_of(b, struct rsc, h);
386 return netobj_equal(&new->handle, &tmp->handle);
390 rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
392 struct rsc *new = container_of(cnew, struct rsc, h);
393 struct rsc *tmp = container_of(ctmp, struct rsc, h);
395 new->handle.len = tmp->handle.len;
397 new->handle.data = tmp->handle.data;
398 tmp->handle.data = NULL;
400 init_svc_cred(&new->cred);
404 update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
406 struct rsc *new = container_of(cnew, struct rsc, h);
407 struct rsc *tmp = container_of(ctmp, struct rsc, h);
409 new->mechctx = tmp->mechctx;
411 memset(&new->seqdata, 0, sizeof(new->seqdata));
412 spin_lock_init(&new->seqdata.sd_lock);
413 new->cred = tmp->cred;
414 init_svc_cred(&tmp->cred);
417 static struct cache_head *
420 struct rsc *rsci = kmalloc(sizeof(*rsci), GFP_KERNEL);
427 static int rsc_parse(struct cache_detail *cd,
428 char *mesg, int mlen)
430 /* contexthandle expiry [ uid gid N <n gids> mechname ...mechdata... ] */
434 struct rsc rsci, *rscp = NULL;
436 int status = -EINVAL;
437 struct gss_api_mech *gm = NULL;
439 memset(&rsci, 0, sizeof(rsci));
441 len = qword_get(&mesg, buf, mlen);
442 if (len < 0) goto out;
444 if (dup_to_netobj(&rsci.handle, buf, len))
449 expiry = get_expiry(&mesg);
454 rscp = rsc_lookup(cd, &rsci);
458 /* uid, or NEGATIVE */
459 rv = get_int(&mesg, &id);
463 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
468 * NOTE: we skip uid_valid()/gid_valid() checks here:
469 * instead, * -1 id's are later mapped to the
470 * (export-specific) anonymous id by nfsd_setuser.
472 * (But supplementary gid's get no such special
473 * treatment so are checked for validity here.)
476 rsci.cred.cr_uid = make_kuid(&init_user_ns, id);
479 if (get_int(&mesg, &id))
481 rsci.cred.cr_gid = make_kgid(&init_user_ns, id);
483 /* number of additional gid's */
484 if (get_int(&mesg, &N))
486 if (N < 0 || N > NGROUPS_MAX)
489 rsci.cred.cr_group_info = groups_alloc(N);
490 if (rsci.cred.cr_group_info == NULL)
495 for (i=0; i<N; i++) {
497 if (get_int(&mesg, &id))
499 kgid = make_kgid(&init_user_ns, id);
500 if (!gid_valid(kgid))
502 rsci.cred.cr_group_info->gid[i] = kgid;
504 groups_sort(rsci.cred.cr_group_info);
507 len = qword_get(&mesg, buf, mlen);
510 gm = rsci.cred.cr_gss_mech = gss_mech_get_by_name(buf);
511 status = -EOPNOTSUPP;
516 /* mech-specific data: */
517 len = qword_get(&mesg, buf, mlen);
520 status = gss_import_sec_context(buf, len, gm, &rsci.mechctx,
525 /* get client name */
526 len = qword_get(&mesg, buf, mlen);
528 rsci.cred.cr_principal = kstrdup(buf, GFP_KERNEL);
529 if (!rsci.cred.cr_principal) {
536 rsci.h.expiry_time = expiry;
537 rscp = rsc_update(cd, &rsci, rscp);
542 cache_put(&rscp->h, cd);
548 static const struct cache_detail rsc_cache_template = {
549 .owner = THIS_MODULE,
550 .hash_size = RSC_HASHMAX,
551 .name = "auth.rpcsec.context",
552 .cache_put = rsc_put,
553 .cache_parse = rsc_parse,
556 .update = update_rsc,
560 static struct rsc *rsc_lookup(struct cache_detail *cd, struct rsc *item)
562 struct cache_head *ch;
563 int hash = rsc_hash(item);
565 ch = sunrpc_cache_lookup_rcu(cd, &item->h, hash);
567 return container_of(ch, struct rsc, h);
572 static struct rsc *rsc_update(struct cache_detail *cd, struct rsc *new, struct rsc *old)
574 struct cache_head *ch;
575 int hash = rsc_hash(new);
577 ch = sunrpc_cache_update(cd, &new->h,
580 return container_of(ch, struct rsc, h);
587 gss_svc_searchbyctx(struct cache_detail *cd, struct xdr_netobj *handle)
592 memset(&rsci, 0, sizeof(rsci));
593 if (dup_to_netobj(&rsci.handle, handle->data, handle->len))
595 found = rsc_lookup(cd, &rsci);
599 if (cache_check(cd, &found->h, NULL))
604 /* Implements sequence number algorithm as specified in RFC 2203. */
606 gss_check_seq_num(struct rsc *rsci, int seq_num)
608 struct gss_svc_seq_data *sd = &rsci->seqdata;
610 spin_lock(&sd->sd_lock);
611 if (seq_num > sd->sd_max) {
612 if (seq_num >= sd->sd_max + GSS_SEQ_WIN) {
613 memset(sd->sd_win,0,sizeof(sd->sd_win));
614 sd->sd_max = seq_num;
615 } else while (sd->sd_max < seq_num) {
617 __clear_bit(sd->sd_max % GSS_SEQ_WIN, sd->sd_win);
619 __set_bit(seq_num % GSS_SEQ_WIN, sd->sd_win);
621 } else if (seq_num <= sd->sd_max - GSS_SEQ_WIN) {
624 /* sd_max - GSS_SEQ_WIN < seq_num <= sd_max */
625 if (__test_and_set_bit(seq_num % GSS_SEQ_WIN, sd->sd_win))
628 spin_unlock(&sd->sd_lock);
631 spin_unlock(&sd->sd_lock);
635 static inline u32 round_up_to_quad(u32 i)
637 return (i + 3 ) & ~3;
641 svc_safe_getnetobj(struct kvec *argv, struct xdr_netobj *o)
645 if (argv->iov_len < 4)
647 o->len = svc_getnl(argv);
648 l = round_up_to_quad(o->len);
649 if (argv->iov_len < l)
651 o->data = argv->iov_base;
658 svc_safe_putnetobj(struct kvec *resv, struct xdr_netobj *o)
662 if (resv->iov_len + 4 > PAGE_SIZE)
664 svc_putnl(resv, o->len);
665 p = resv->iov_base + resv->iov_len;
666 resv->iov_len += round_up_to_quad(o->len);
667 if (resv->iov_len > PAGE_SIZE)
669 memcpy(p, o->data, o->len);
670 memset(p + o->len, 0, round_up_to_quad(o->len) - o->len);
675 * Verify the checksum on the header and return SVC_OK on success.
676 * Otherwise, return SVC_DROP (in the case of a bad sequence number)
677 * or return SVC_DENIED and indicate error in authp.
680 gss_verify_header(struct svc_rqst *rqstp, struct rsc *rsci,
681 __be32 *rpcstart, struct rpc_gss_wire_cred *gc, __be32 *authp)
683 struct gss_ctx *ctx_id = rsci->mechctx;
684 struct xdr_buf rpchdr;
685 struct xdr_netobj checksum;
687 struct kvec *argv = &rqstp->rq_arg.head[0];
690 /* data to compute the checksum over: */
691 iov.iov_base = rpcstart;
692 iov.iov_len = (u8 *)argv->iov_base - (u8 *)rpcstart;
693 xdr_buf_from_iov(&iov, &rpchdr);
695 *authp = rpc_autherr_badverf;
696 if (argv->iov_len < 4)
698 flavor = svc_getnl(argv);
699 if (flavor != RPC_AUTH_GSS)
701 if (svc_safe_getnetobj(argv, &checksum))
704 if (rqstp->rq_deferred) /* skip verification of revisited request */
706 if (gss_verify_mic(ctx_id, &rpchdr, &checksum) != GSS_S_COMPLETE) {
707 *authp = rpcsec_gsserr_credproblem;
711 if (gc->gc_seq > MAXSEQ) {
712 dprintk("RPC: svcauth_gss: discarding request with "
713 "large sequence number %d\n", gc->gc_seq);
714 *authp = rpcsec_gsserr_ctxproblem;
717 if (!gss_check_seq_num(rsci, gc->gc_seq)) {
718 dprintk("RPC: svcauth_gss: discarding request with "
719 "old sequence number %d\n", gc->gc_seq);
726 gss_write_null_verf(struct svc_rqst *rqstp)
730 svc_putnl(rqstp->rq_res.head, RPC_AUTH_NULL);
731 p = rqstp->rq_res.head->iov_base + rqstp->rq_res.head->iov_len;
732 /* don't really need to check if head->iov_len > PAGE_SIZE ... */
734 if (!xdr_ressize_check(rqstp, p))
740 gss_write_verf(struct svc_rqst *rqstp, struct gss_ctx *ctx_id, u32 seq)
744 struct xdr_buf verf_data;
745 struct xdr_netobj mic;
750 svc_putnl(rqstp->rq_res.head, RPC_AUTH_GSS);
751 xdr_seq = kmalloc(4, GFP_KERNEL);
754 *xdr_seq = htonl(seq);
756 iov.iov_base = xdr_seq;
758 xdr_buf_from_iov(&iov, &verf_data);
759 p = rqstp->rq_res.head->iov_base + rqstp->rq_res.head->iov_len;
760 mic.data = (u8 *)(p + 1);
761 maj_stat = gss_get_mic(ctx_id, &verf_data, &mic);
762 if (maj_stat != GSS_S_COMPLETE)
764 *p++ = htonl(mic.len);
765 memset((u8 *)p + mic.len, 0, round_up_to_quad(mic.len) - mic.len);
766 p += XDR_QUADLEN(mic.len);
767 if (!xdr_ressize_check(rqstp, p))
776 struct auth_domain h;
780 static struct auth_domain *
781 find_gss_auth_domain(struct gss_ctx *ctx, u32 svc)
785 name = gss_service_to_auth_domain_name(ctx->mech_type, svc);
788 return auth_domain_find(name);
791 static struct auth_ops svcauthops_gss;
793 u32 svcauth_gss_flavor(struct auth_domain *dom)
795 struct gss_domain *gd = container_of(dom, struct gss_domain, h);
797 return gd->pseudoflavor;
800 EXPORT_SYMBOL_GPL(svcauth_gss_flavor);
803 svcauth_gss_register_pseudoflavor(u32 pseudoflavor, char * name)
805 struct gss_domain *new;
806 struct auth_domain *test;
809 new = kmalloc(sizeof(*new), GFP_KERNEL);
812 kref_init(&new->h.ref);
813 new->h.name = kstrdup(name, GFP_KERNEL);
816 new->h.flavour = &svcauthops_gss;
817 new->pseudoflavor = pseudoflavor;
820 test = auth_domain_lookup(name, &new->h);
821 if (test != &new->h) { /* Duplicate registration */
822 auth_domain_put(test);
834 EXPORT_SYMBOL_GPL(svcauth_gss_register_pseudoflavor);
837 read_u32_from_xdr_buf(struct xdr_buf *buf, int base, u32 *obj)
842 status = read_bytes_from_xdr_buf(buf, base, &raw, sizeof(*obj));
849 /* It would be nice if this bit of code could be shared with the client.
851 * The client shouldn't malloc(), would have to pass in own memory.
852 * The server uses base of head iovec as read pointer, while the
853 * client uses separate pointer. */
855 unwrap_integ_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gss_ctx *ctx)
858 u32 integ_len, maj_stat;
859 struct xdr_netobj mic;
860 struct xdr_buf integ_buf;
862 /* NFS READ normally uses splice to send data in-place. However
863 * the data in cache can change after the reply's MIC is computed
864 * but before the RPC reply is sent. To prevent the client from
865 * rejecting the server-computed MIC in this somewhat rare case,
866 * do not use splice with the GSS integrity service.
868 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
870 /* Did we already verify the signature on the original pass through? */
871 if (rqstp->rq_deferred)
874 integ_len = svc_getnl(&buf->head[0]);
877 if (integ_len > buf->len)
879 if (xdr_buf_subsegment(buf, &integ_buf, 0, integ_len)) {
883 /* copy out mic... */
884 if (read_u32_from_xdr_buf(buf, integ_len, &mic.len))
886 if (mic.len > RPC_MAX_AUTH_SIZE)
888 mic.data = kmalloc(mic.len, GFP_KERNEL);
891 if (read_bytes_from_xdr_buf(buf, integ_len + 4, mic.data, mic.len))
893 maj_stat = gss_verify_mic(ctx, &integ_buf, &mic);
894 if (maj_stat != GSS_S_COMPLETE)
896 if (svc_getnl(&buf->head[0]) != seq)
898 /* trim off the mic and padding at the end before returning */
899 xdr_buf_trim(buf, round_up_to_quad(mic.len) + 4);
907 total_buf_len(struct xdr_buf *buf)
909 return buf->head[0].iov_len + buf->page_len + buf->tail[0].iov_len;
913 fix_priv_head(struct xdr_buf *buf, int pad)
915 if (buf->page_len == 0) {
916 /* We need to adjust head and buf->len in tandem in this
917 * case to make svc_defer() work--it finds the original
918 * buffer start using buf->len - buf->head[0].iov_len. */
919 buf->head[0].iov_len -= pad;
924 unwrap_priv_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gss_ctx *ctx)
926 u32 priv_len, maj_stat;
927 int pad, saved_len, remaining_len, offset;
929 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
931 priv_len = svc_getnl(&buf->head[0]);
932 if (rqstp->rq_deferred) {
933 /* Already decrypted last time through! The sequence number
934 * check at out_seq is unnecessary but harmless: */
937 /* buf->len is the number of bytes from the original start of the
938 * request to the end, where head[0].iov_len is just the bytes
939 * not yet read from the head, so these two values are different: */
940 remaining_len = total_buf_len(buf);
941 if (priv_len > remaining_len)
943 pad = remaining_len - priv_len;
945 fix_priv_head(buf, pad);
947 /* Maybe it would be better to give gss_unwrap a length parameter: */
948 saved_len = buf->len;
950 maj_stat = gss_unwrap(ctx, 0, buf);
951 pad = priv_len - buf->len;
952 buf->len = saved_len;
954 /* The upper layers assume the buffer is aligned on 4-byte boundaries.
955 * In the krb5p case, at least, the data ends up offset, so we need to
957 /* XXX: This is very inefficient. It would be better to either do
958 * this while we encrypt, or maybe in the receive code, if we can peak
959 * ahead and work out the service and mechanism there. */
960 offset = buf->head[0].iov_len % 4;
962 buf->buflen = RPCSVC_MAXPAYLOAD;
963 xdr_shift_buf(buf, offset);
964 fix_priv_head(buf, pad);
966 if (maj_stat != GSS_S_COMPLETE)
969 if (svc_getnl(&buf->head[0]) != seq)
974 struct gss_svc_data {
975 /* decoded gss client cred: */
976 struct rpc_gss_wire_cred clcred;
977 /* save a pointer to the beginning of the encoded verifier,
978 * for use in encryption/checksumming in svcauth_gss_release: */
984 svcauth_gss_set_client(struct svc_rqst *rqstp)
986 struct gss_svc_data *svcdata = rqstp->rq_auth_data;
987 struct rsc *rsci = svcdata->rsci;
988 struct rpc_gss_wire_cred *gc = &svcdata->clcred;
992 * A gss export can be specified either by:
993 * export *(sec=krb5,rw)
995 * export gss/krb5(rw)
996 * The latter is deprecated; but for backwards compatibility reasons
997 * the nfsd code will still fall back on trying it if the former
998 * doesn't work; so we try to make both available to nfsd, below.
1000 rqstp->rq_gssclient = find_gss_auth_domain(rsci->mechctx, gc->gc_svc);
1001 if (rqstp->rq_gssclient == NULL)
1003 stat = svcauth_unix_set_client(rqstp);
1004 if (stat == SVC_DROP || stat == SVC_CLOSE)
1010 gss_write_init_verf(struct cache_detail *cd, struct svc_rqst *rqstp,
1011 struct xdr_netobj *out_handle, int *major_status)
1016 if (*major_status != GSS_S_COMPLETE)
1017 return gss_write_null_verf(rqstp);
1018 rsci = gss_svc_searchbyctx(cd, out_handle);
1020 *major_status = GSS_S_NO_CONTEXT;
1021 return gss_write_null_verf(rqstp);
1023 rc = gss_write_verf(rqstp, rsci->mechctx, GSS_SEQ_WIN);
1024 cache_put(&rsci->h, cd);
1029 gss_read_common_verf(struct rpc_gss_wire_cred *gc,
1030 struct kvec *argv, __be32 *authp,
1031 struct xdr_netobj *in_handle)
1033 /* Read the verifier; should be NULL: */
1034 *authp = rpc_autherr_badverf;
1035 if (argv->iov_len < 2 * 4)
1037 if (svc_getnl(argv) != RPC_AUTH_NULL)
1039 if (svc_getnl(argv) != 0)
1041 /* Martial context handle and token for upcall: */
1042 *authp = rpc_autherr_badcred;
1043 if (gc->gc_proc == RPC_GSS_PROC_INIT && gc->gc_ctx.len != 0)
1045 if (dup_netobj(in_handle, &gc->gc_ctx))
1047 *authp = rpc_autherr_badverf;
1053 gss_read_verf(struct rpc_gss_wire_cred *gc,
1054 struct kvec *argv, __be32 *authp,
1055 struct xdr_netobj *in_handle,
1056 struct xdr_netobj *in_token)
1058 struct xdr_netobj tmpobj;
1061 res = gss_read_common_verf(gc, argv, authp, in_handle);
1065 if (svc_safe_getnetobj(argv, &tmpobj)) {
1066 kfree(in_handle->data);
1069 if (dup_netobj(in_token, &tmpobj)) {
1070 kfree(in_handle->data);
1077 /* Ok this is really heavily depending on a set of semantics in
1078 * how rqstp is set up by svc_recv and pages laid down by the
1079 * server when reading a request. We are basically guaranteed that
1080 * the token lays all down linearly across a set of pages, starting
1081 * at iov_base in rq_arg.head[0] which happens to be the first of a
1082 * set of pages stored in rq_pages[].
1083 * rq_arg.head[0].iov_base will provide us the page_base to pass
1087 gss_read_proxy_verf(struct svc_rqst *rqstp,
1088 struct rpc_gss_wire_cred *gc, __be32 *authp,
1089 struct xdr_netobj *in_handle,
1090 struct gssp_in_token *in_token)
1092 struct kvec *argv = &rqstp->rq_arg.head[0];
1096 res = gss_read_common_verf(gc, argv, authp, in_handle);
1100 inlen = svc_getnl(argv);
1101 if (inlen > (argv->iov_len + rqstp->rq_arg.page_len))
1104 in_token->pages = rqstp->rq_pages;
1105 in_token->page_base = (ulong)argv->iov_base & ~PAGE_MASK;
1106 in_token->page_len = inlen;
1112 gss_write_resv(struct kvec *resv, size_t size_limit,
1113 struct xdr_netobj *out_handle, struct xdr_netobj *out_token,
1114 int major_status, int minor_status)
1116 if (resv->iov_len + 4 > size_limit)
1118 svc_putnl(resv, RPC_SUCCESS);
1119 if (svc_safe_putnetobj(resv, out_handle))
1121 if (resv->iov_len + 3 * 4 > size_limit)
1123 svc_putnl(resv, major_status);
1124 svc_putnl(resv, minor_status);
1125 svc_putnl(resv, GSS_SEQ_WIN);
1126 if (svc_safe_putnetobj(resv, out_token))
1132 * Having read the cred already and found we're in the context
1133 * initiation case, read the verifier and initiate (or check the results
1134 * of) upcalls to userspace for help with context initiation. If
1135 * the upcall results are available, write the verifier and result.
1136 * Otherwise, drop the request pending an answer to the upcall.
1138 static int svcauth_gss_legacy_init(struct svc_rqst *rqstp,
1139 struct rpc_gss_wire_cred *gc, __be32 *authp)
1141 struct kvec *argv = &rqstp->rq_arg.head[0];
1142 struct kvec *resv = &rqstp->rq_res.head[0];
1143 struct rsi *rsip, rsikey;
1145 struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, sunrpc_net_id);
1147 memset(&rsikey, 0, sizeof(rsikey));
1148 ret = gss_read_verf(gc, argv, authp,
1149 &rsikey.in_handle, &rsikey.in_token);
1153 /* Perform upcall, or find upcall result: */
1154 rsip = rsi_lookup(sn->rsi_cache, &rsikey);
1158 if (cache_check(sn->rsi_cache, &rsip->h, &rqstp->rq_chandle) < 0)
1159 /* No upcall result: */
1163 /* Got an answer to the upcall; use it: */
1164 if (gss_write_init_verf(sn->rsc_cache, rqstp,
1165 &rsip->out_handle, &rsip->major_status))
1167 if (gss_write_resv(resv, PAGE_SIZE,
1168 &rsip->out_handle, &rsip->out_token,
1169 rsip->major_status, rsip->minor_status))
1174 cache_put(&rsip->h, sn->rsi_cache);
1178 static int gss_proxy_save_rsc(struct cache_detail *cd,
1179 struct gssp_upcall_data *ud,
1182 struct rsc rsci, *rscp = NULL;
1183 static atomic64_t ctxhctr;
1185 struct gss_api_mech *gm = NULL;
1187 int status = -EINVAL;
1189 memset(&rsci, 0, sizeof(rsci));
1190 /* context handle */
1192 /* the handle needs to be just a unique id,
1193 * use a static counter */
1194 ctxh = atomic64_inc_return(&ctxhctr);
1196 /* make a copy for the caller */
1199 /* make a copy for the rsc cache */
1200 if (dup_to_netobj(&rsci.handle, (char *)handle, sizeof(uint64_t)))
1202 rscp = rsc_lookup(cd, &rsci);
1207 if (!ud->found_creds) {
1208 /* userspace seem buggy, we should always get at least a
1209 * mapping to nobody */
1210 dprintk("RPC: No creds found!\n");
1215 rsci.cred = ud->creds;
1216 memset(&ud->creds, 0, sizeof(struct svc_cred));
1218 status = -EOPNOTSUPP;
1219 /* get mech handle from OID */
1220 gm = gss_mech_get_by_OID(&ud->mech_oid);
1223 rsci.cred.cr_gss_mech = gm;
1226 /* mech-specific data: */
1227 status = gss_import_sec_context(ud->out_handle.data,
1230 &expiry, GFP_KERNEL);
1235 rsci.h.expiry_time = expiry;
1236 rscp = rsc_update(cd, &rsci, rscp);
1241 cache_put(&rscp->h, cd);
1247 static int svcauth_gss_proxy_init(struct svc_rqst *rqstp,
1248 struct rpc_gss_wire_cred *gc, __be32 *authp)
1250 struct kvec *resv = &rqstp->rq_res.head[0];
1251 struct xdr_netobj cli_handle;
1252 struct gssp_upcall_data ud;
1256 struct net *net = rqstp->rq_xprt->xpt_net;
1257 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1259 memset(&ud, 0, sizeof(ud));
1260 ret = gss_read_proxy_verf(rqstp, gc, authp,
1261 &ud.in_handle, &ud.in_token);
1267 /* Perform synchronous upcall to gss-proxy */
1268 status = gssp_accept_sec_context_upcall(net, &ud);
1272 dprintk("RPC: svcauth_gss: gss major status = %d "
1273 "minor status = %d\n",
1274 ud.major_status, ud.minor_status);
1276 switch (ud.major_status) {
1277 case GSS_S_CONTINUE_NEEDED:
1278 cli_handle = ud.out_handle;
1280 case GSS_S_COMPLETE:
1281 status = gss_proxy_save_rsc(sn->rsc_cache, &ud, &handle);
1284 cli_handle.data = (u8 *)&handle;
1285 cli_handle.len = sizeof(handle);
1292 /* Got an answer to the upcall; use it: */
1293 if (gss_write_init_verf(sn->rsc_cache, rqstp,
1294 &cli_handle, &ud.major_status))
1296 if (gss_write_resv(resv, PAGE_SIZE,
1297 &cli_handle, &ud.out_token,
1298 ud.major_status, ud.minor_status))
1303 gssp_free_upcall_data(&ud);
1308 * Try to set the sn->use_gss_proxy variable to a new value. We only allow
1309 * it to be changed if it's currently undefined (-1). If it's any other value
1310 * then return -EBUSY unless the type wouldn't have changed anyway.
1312 static int set_gss_proxy(struct net *net, int type)
1314 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1317 WARN_ON_ONCE(type != 0 && type != 1);
1318 ret = cmpxchg(&sn->use_gss_proxy, -1, type);
1319 if (ret != -1 && ret != type)
1324 static bool use_gss_proxy(struct net *net)
1326 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1328 /* If use_gss_proxy is still undefined, then try to disable it */
1329 if (sn->use_gss_proxy == -1)
1330 set_gss_proxy(net, 0);
1331 return sn->use_gss_proxy;
1334 #ifdef CONFIG_PROC_FS
1336 static ssize_t write_gssp(struct file *file, const char __user *buf,
1337 size_t count, loff_t *ppos)
1339 struct net *net = PDE_DATA(file_inode(file));
1344 if (*ppos || count > sizeof(tbuf)-1)
1346 if (copy_from_user(tbuf, buf, count))
1350 res = kstrtoul(tbuf, 0, &i);
1355 res = set_gssp_clnt(net);
1358 res = set_gss_proxy(net, 1);
1364 static ssize_t read_gssp(struct file *file, char __user *buf,
1365 size_t count, loff_t *ppos)
1367 struct net *net = PDE_DATA(file_inode(file));
1368 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1369 unsigned long p = *ppos;
1373 snprintf(tbuf, sizeof(tbuf), "%d\n", sn->use_gss_proxy);
1380 if (copy_to_user(buf, (void *)(tbuf+p), len))
1386 static const struct file_operations use_gss_proxy_ops = {
1387 .open = nonseekable_open,
1388 .write = write_gssp,
1392 static int create_use_gss_proxy_proc_entry(struct net *net)
1394 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1395 struct proc_dir_entry **p = &sn->use_gssp_proc;
1397 sn->use_gss_proxy = -1;
1398 *p = proc_create_data("use-gss-proxy", S_IFREG | 0600,
1400 &use_gss_proxy_ops, net);
1407 static void destroy_use_gss_proxy_proc_entry(struct net *net)
1409 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1411 if (sn->use_gssp_proc) {
1412 remove_proc_entry("use-gss-proxy", sn->proc_net_rpc);
1413 clear_gssp_clnt(sn);
1416 #else /* CONFIG_PROC_FS */
1418 static int create_use_gss_proxy_proc_entry(struct net *net)
1423 static void destroy_use_gss_proxy_proc_entry(struct net *net) {}
1425 #endif /* CONFIG_PROC_FS */
1428 * Accept an rpcsec packet.
1429 * If context establishment, punt to user space
1430 * If data exchange, verify/decrypt
1431 * If context destruction, handle here
1432 * In the context establishment and destruction case we encode
1433 * response here and return SVC_COMPLETE.
1436 svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
1438 struct kvec *argv = &rqstp->rq_arg.head[0];
1439 struct kvec *resv = &rqstp->rq_res.head[0];
1441 struct gss_svc_data *svcdata = rqstp->rq_auth_data;
1442 struct rpc_gss_wire_cred *gc;
1443 struct rsc *rsci = NULL;
1445 __be32 *reject_stat = resv->iov_base + resv->iov_len;
1447 struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, sunrpc_net_id);
1449 dprintk("RPC: svcauth_gss: argv->iov_len = %zd\n",
1452 *authp = rpc_autherr_badcred;
1454 svcdata = kmalloc(sizeof(*svcdata), GFP_KERNEL);
1457 rqstp->rq_auth_data = svcdata;
1458 svcdata->verf_start = NULL;
1459 svcdata->rsci = NULL;
1460 gc = &svcdata->clcred;
1462 /* start of rpc packet is 7 u32's back from here:
1463 * xid direction rpcversion prog vers proc flavour
1465 rpcstart = argv->iov_base;
1469 * version(==1), proc(0,1,2,3), seq, service (1,2,3), handle
1470 * at least 5 u32s, and is preceded by length, so that makes 6.
1473 if (argv->iov_len < 5 * 4)
1475 crlen = svc_getnl(argv);
1476 if (svc_getnl(argv) != RPC_GSS_VERSION)
1478 gc->gc_proc = svc_getnl(argv);
1479 gc->gc_seq = svc_getnl(argv);
1480 gc->gc_svc = svc_getnl(argv);
1481 if (svc_safe_getnetobj(argv, &gc->gc_ctx))
1483 if (crlen != round_up_to_quad(gc->gc_ctx.len) + 5 * 4)
1486 if ((gc->gc_proc != RPC_GSS_PROC_DATA) && (rqstp->rq_proc != 0))
1489 *authp = rpc_autherr_badverf;
1490 switch (gc->gc_proc) {
1491 case RPC_GSS_PROC_INIT:
1492 case RPC_GSS_PROC_CONTINUE_INIT:
1493 if (use_gss_proxy(SVC_NET(rqstp)))
1494 return svcauth_gss_proxy_init(rqstp, gc, authp);
1496 return svcauth_gss_legacy_init(rqstp, gc, authp);
1497 case RPC_GSS_PROC_DATA:
1498 case RPC_GSS_PROC_DESTROY:
1499 /* Look up the context, and check the verifier: */
1500 *authp = rpcsec_gsserr_credproblem;
1501 rsci = gss_svc_searchbyctx(sn->rsc_cache, &gc->gc_ctx);
1504 switch (gss_verify_header(rqstp, rsci, rpcstart, gc, authp)) {
1514 *authp = rpc_autherr_rejectedcred;
1518 /* now act upon the command: */
1519 switch (gc->gc_proc) {
1520 case RPC_GSS_PROC_DESTROY:
1521 if (gss_write_verf(rqstp, rsci->mechctx, gc->gc_seq))
1523 /* Delete the entry from the cache_list and call cache_put */
1524 sunrpc_cache_unhash(sn->rsc_cache, &rsci->h);
1525 if (resv->iov_len + 4 > PAGE_SIZE)
1527 svc_putnl(resv, RPC_SUCCESS);
1529 case RPC_GSS_PROC_DATA:
1530 *authp = rpcsec_gsserr_ctxproblem;
1531 svcdata->verf_start = resv->iov_base + resv->iov_len;
1532 if (gss_write_verf(rqstp, rsci->mechctx, gc->gc_seq))
1534 rqstp->rq_cred = rsci->cred;
1535 get_group_info(rsci->cred.cr_group_info);
1536 *authp = rpc_autherr_badcred;
1537 switch (gc->gc_svc) {
1538 case RPC_GSS_SVC_NONE:
1540 case RPC_GSS_SVC_INTEGRITY:
1541 /* placeholders for length and seq. number: */
1544 if (unwrap_integ_data(rqstp, &rqstp->rq_arg,
1545 gc->gc_seq, rsci->mechctx))
1547 rqstp->rq_auth_slack = RPC_MAX_AUTH_SIZE;
1549 case RPC_GSS_SVC_PRIVACY:
1550 /* placeholders for length and seq. number: */
1553 if (unwrap_priv_data(rqstp, &rqstp->rq_arg,
1554 gc->gc_seq, rsci->mechctx))
1556 rqstp->rq_auth_slack = RPC_MAX_AUTH_SIZE * 2;
1561 svcdata->rsci = rsci;
1562 cache_get(&rsci->h);
1563 rqstp->rq_cred.cr_flavor = gss_svc_to_pseudoflavor(
1564 rsci->mechctx->mech_type,
1574 /* Restore write pointer to its original value: */
1575 xdr_ressize_check(rqstp, reject_stat);
1585 cache_put(&rsci->h, sn->rsc_cache);
1590 svcauth_gss_prepare_to_wrap(struct xdr_buf *resbuf, struct gss_svc_data *gsd)
1595 p = gsd->verf_start;
1596 gsd->verf_start = NULL;
1598 /* If the reply stat is nonzero, don't wrap: */
1599 if (*(p-1) != rpc_success)
1601 /* Skip the verifier: */
1603 verf_len = ntohl(*p++);
1604 p += XDR_QUADLEN(verf_len);
1605 /* move accept_stat to right place: */
1606 memcpy(p, p + 2, 4);
1607 /* Also don't wrap if the accept stat is nonzero: */
1608 if (*p != rpc_success) {
1609 resbuf->head[0].iov_len -= 2 * 4;
1617 svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp)
1619 struct gss_svc_data *gsd = (struct gss_svc_data *)rqstp->rq_auth_data;
1620 struct rpc_gss_wire_cred *gc = &gsd->clcred;
1621 struct xdr_buf *resbuf = &rqstp->rq_res;
1622 struct xdr_buf integ_buf;
1623 struct xdr_netobj mic;
1626 int integ_offset, integ_len;
1629 p = svcauth_gss_prepare_to_wrap(resbuf, gsd);
1632 integ_offset = (u8 *)(p + 1) - (u8 *)resbuf->head[0].iov_base;
1633 integ_len = resbuf->len - integ_offset;
1634 BUG_ON(integ_len % 4);
1635 *p++ = htonl(integ_len);
1636 *p++ = htonl(gc->gc_seq);
1637 if (xdr_buf_subsegment(resbuf, &integ_buf, integ_offset, integ_len)) {
1641 if (resbuf->tail[0].iov_base == NULL) {
1642 if (resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE > PAGE_SIZE)
1644 resbuf->tail[0].iov_base = resbuf->head[0].iov_base
1645 + resbuf->head[0].iov_len;
1646 resbuf->tail[0].iov_len = 0;
1648 resv = &resbuf->tail[0];
1649 mic.data = (u8 *)resv->iov_base + resv->iov_len + 4;
1650 if (gss_get_mic(gsd->rsci->mechctx, &integ_buf, &mic))
1652 svc_putnl(resv, mic.len);
1653 memset(mic.data + mic.len, 0,
1654 round_up_to_quad(mic.len) - mic.len);
1655 resv->iov_len += XDR_QUADLEN(mic.len) << 2;
1656 /* not strictly required: */
1657 resbuf->len += XDR_QUADLEN(mic.len) << 2;
1658 BUG_ON(resv->iov_len > PAGE_SIZE);
1666 svcauth_gss_wrap_resp_priv(struct svc_rqst *rqstp)
1668 struct gss_svc_data *gsd = (struct gss_svc_data *)rqstp->rq_auth_data;
1669 struct rpc_gss_wire_cred *gc = &gsd->clcred;
1670 struct xdr_buf *resbuf = &rqstp->rq_res;
1671 struct page **inpages = NULL;
1676 p = svcauth_gss_prepare_to_wrap(resbuf, gsd);
1680 offset = (u8 *)p - (u8 *)resbuf->head[0].iov_base;
1681 *p++ = htonl(gc->gc_seq);
1682 inpages = resbuf->pages;
1683 /* XXX: Would be better to write some xdr helper functions for
1684 * nfs{2,3,4}xdr.c that place the data right, instead of copying: */
1687 * If there is currently tail data, make sure there is
1688 * room for the head, tail, and 2 * RPC_MAX_AUTH_SIZE in
1689 * the page, and move the current tail data such that
1690 * there is RPC_MAX_AUTH_SIZE slack space available in
1691 * both the head and tail.
1693 if (resbuf->tail[0].iov_base) {
1694 BUG_ON(resbuf->tail[0].iov_base >= resbuf->head[0].iov_base
1696 BUG_ON(resbuf->tail[0].iov_base < resbuf->head[0].iov_base);
1697 if (resbuf->tail[0].iov_len + resbuf->head[0].iov_len
1698 + 2 * RPC_MAX_AUTH_SIZE > PAGE_SIZE)
1700 memmove(resbuf->tail[0].iov_base + RPC_MAX_AUTH_SIZE,
1701 resbuf->tail[0].iov_base,
1702 resbuf->tail[0].iov_len);
1703 resbuf->tail[0].iov_base += RPC_MAX_AUTH_SIZE;
1706 * If there is no current tail data, make sure there is
1707 * room for the head data, and 2 * RPC_MAX_AUTH_SIZE in the
1708 * allotted page, and set up tail information such that there
1709 * is RPC_MAX_AUTH_SIZE slack space available in both the
1712 if (resbuf->tail[0].iov_base == NULL) {
1713 if (resbuf->head[0].iov_len + 2*RPC_MAX_AUTH_SIZE > PAGE_SIZE)
1715 resbuf->tail[0].iov_base = resbuf->head[0].iov_base
1716 + resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE;
1717 resbuf->tail[0].iov_len = 0;
1719 if (gss_wrap(gsd->rsci->mechctx, offset, resbuf, inpages))
1721 *len = htonl(resbuf->len - offset);
1722 pad = 3 - ((resbuf->len - offset - 1)&3);
1723 p = (__be32 *)(resbuf->tail[0].iov_base + resbuf->tail[0].iov_len);
1725 resbuf->tail[0].iov_len += pad;
1731 svcauth_gss_release(struct svc_rqst *rqstp)
1733 struct gss_svc_data *gsd = (struct gss_svc_data *)rqstp->rq_auth_data;
1734 struct rpc_gss_wire_cred *gc = &gsd->clcred;
1735 struct xdr_buf *resbuf = &rqstp->rq_res;
1737 struct sunrpc_net *sn = net_generic(rqstp->rq_xprt->xpt_net, sunrpc_net_id);
1739 if (gc->gc_proc != RPC_GSS_PROC_DATA)
1741 /* Release can be called twice, but we only wrap once. */
1742 if (gsd->verf_start == NULL)
1744 /* normally not set till svc_send, but we need it here: */
1745 /* XXX: what for? Do we mess it up the moment we call svc_putu32
1747 resbuf->len = total_buf_len(resbuf);
1748 switch (gc->gc_svc) {
1749 case RPC_GSS_SVC_NONE:
1751 case RPC_GSS_SVC_INTEGRITY:
1752 stat = svcauth_gss_wrap_resp_integ(rqstp);
1756 case RPC_GSS_SVC_PRIVACY:
1757 stat = svcauth_gss_wrap_resp_priv(rqstp);
1762 * For any other gc_svc value, svcauth_gss_accept() already set
1763 * the auth_error appropriately; just fall through:
1770 if (rqstp->rq_client)
1771 auth_domain_put(rqstp->rq_client);
1772 rqstp->rq_client = NULL;
1773 if (rqstp->rq_gssclient)
1774 auth_domain_put(rqstp->rq_gssclient);
1775 rqstp->rq_gssclient = NULL;
1776 if (rqstp->rq_cred.cr_group_info)
1777 put_group_info(rqstp->rq_cred.cr_group_info);
1778 rqstp->rq_cred.cr_group_info = NULL;
1780 cache_put(&gsd->rsci->h, sn->rsc_cache);
1787 svcauth_gss_domain_release_rcu(struct rcu_head *head)
1789 struct auth_domain *dom = container_of(head, struct auth_domain, rcu_head);
1790 struct gss_domain *gd = container_of(dom, struct gss_domain, h);
1797 svcauth_gss_domain_release(struct auth_domain *dom)
1799 call_rcu(&dom->rcu_head, svcauth_gss_domain_release_rcu);
1802 static struct auth_ops svcauthops_gss = {
1803 .name = "rpcsec_gss",
1804 .owner = THIS_MODULE,
1805 .flavour = RPC_AUTH_GSS,
1806 .accept = svcauth_gss_accept,
1807 .release = svcauth_gss_release,
1808 .domain_release = svcauth_gss_domain_release,
1809 .set_client = svcauth_gss_set_client,
1812 static int rsi_cache_create_net(struct net *net)
1814 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1815 struct cache_detail *cd;
1818 cd = cache_create_net(&rsi_cache_template, net);
1821 err = cache_register_net(cd, net);
1823 cache_destroy_net(cd, net);
1830 static void rsi_cache_destroy_net(struct net *net)
1832 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1833 struct cache_detail *cd = sn->rsi_cache;
1835 sn->rsi_cache = NULL;
1837 cache_unregister_net(cd, net);
1838 cache_destroy_net(cd, net);
1841 static int rsc_cache_create_net(struct net *net)
1843 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1844 struct cache_detail *cd;
1847 cd = cache_create_net(&rsc_cache_template, net);
1850 err = cache_register_net(cd, net);
1852 cache_destroy_net(cd, net);
1859 static void rsc_cache_destroy_net(struct net *net)
1861 struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
1862 struct cache_detail *cd = sn->rsc_cache;
1864 sn->rsc_cache = NULL;
1866 cache_unregister_net(cd, net);
1867 cache_destroy_net(cd, net);
1871 gss_svc_init_net(struct net *net)
1875 rv = rsc_cache_create_net(net);
1878 rv = rsi_cache_create_net(net);
1881 rv = create_use_gss_proxy_proc_entry(net);
1886 destroy_use_gss_proxy_proc_entry(net);
1888 rsc_cache_destroy_net(net);
1893 gss_svc_shutdown_net(struct net *net)
1895 destroy_use_gss_proxy_proc_entry(net);
1896 rsi_cache_destroy_net(net);
1897 rsc_cache_destroy_net(net);
1903 return svc_auth_register(RPC_AUTH_GSS, &svcauthops_gss);
1907 gss_svc_shutdown(void)
1909 svc_auth_unregister(RPC_AUTH_GSS);