2 * Modifications for Lustre
4 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
6 * Copyright (c) 2012, 2014, Intel Corporation.
8 * Author: Eric Mei <ericm@clusterfs.com>
12 * Neil Brown <neilb@cse.unsw.edu.au>
13 * J. Bruce Fields <bfields@umich.edu>
14 * Andy Adamson <andros@umich.edu>
15 * Dug Song <dugsong@monkey.org>
17 * RPCSEC_GSS server authentication.
18 * This implements RPCSEC_GSS as defined in rfc2203 (rpcsec_gss) and rfc2078
21 * The RPCSEC_GSS involves three stages:
24 * 3/ context destruction
26 * Context creation is handled largely by upcalls to user-space.
27 * In particular, GSS_Accept_sec_context is handled by an upcall
28 * Data exchange is handled entirely within the kernel
29 * In particular, GSS_GetMIC, GSS_VerifyMIC, GSS_Seal, GSS_Unseal are in-kernel.
30 * Context destruction is handled in-kernel
31 * GSS_Delete_sec_context is in-kernel
33 * Context creation is initiated by a RPCSEC_GSS_INIT request arriving.
34 * The context handle and gss_token are used as a key into the rpcsec_init cache.
35 * The content of this cache includes some of the outputs of GSS_Accept_sec_context,
36 * being major_status, minor_status, context_handle, reply_token.
37 * These are sent back to the client.
38 * Sequence window management is handled by the kernel. The window size if currently
39 * a compile time constant.
41 * When user-space is happy that a context is established, it places an entry
42 * in the rpcsec_context cache. The key for this cache is the context_handle.
43 * The content includes:
44 * uid/gidlist - for determining access rights
46 * mechanism specific information, such as a key
50 #define DEBUG_SUBSYSTEM S_SEC
51 #include <linux/types.h>
52 #include <linux/init.h>
53 #include <linux/module.h>
54 #include <linux/slab.h>
55 #include <linux/hash.h>
56 #include <linux/mutex.h>
57 #include <linux/sunrpc/cache.h>
61 #include <obd_class.h>
62 #include <obd_support.h>
63 #include <lustre_import.h>
64 #include <lustre_net.h>
65 #include <lustre_nodemap.h>
66 #include <lustre_sec.h>
69 #include "gss_internal.h"
71 #include "gss_crypto.h"
73 #define GSS_SVC_UPCALL_TIMEOUT (20)
75 static spinlock_t __ctx_index_lock;
76 static __u64 __ctx_index;
78 unsigned int krb5_allow_old_client_csum;
80 __u64 gss_get_next_ctx_index(void)
84 spin_lock(&__ctx_index_lock);
86 spin_unlock(&__ctx_index_lock);
91 static inline unsigned long hash_mem(char *buf, int length, int bits)
93 unsigned long hash = 0;
108 if ((len & (BITS_PER_LONG/8-1)) == 0)
109 hash = hash_long(hash^l, BITS_PER_LONG);
112 return hash >> (BITS_PER_LONG - bits);
115 /* This compatibility can be removed once kernel 3.3 is used,
116 * since cache_register_net/cache_unregister_net are exported.
117 * Note that since kernel 3.4 cache_register and cache_unregister
120 static inline int _cache_register_net(struct cache_detail *cd, struct net *net)
122 #ifdef HAVE_CACHE_REGISTER
123 return cache_register(cd);
125 return cache_register_net(cd, net);
128 static inline void _cache_unregister_net(struct cache_detail *cd,
131 #ifdef HAVE_CACHE_REGISTER
132 cache_unregister(cd);
134 cache_unregister_net(cd, net);
137 /****************************************
138 * rpc sec init (rsi) cache *
139 ****************************************/
141 #define RSI_HASHBITS (6)
142 #define RSI_HASHMAX (1 << RSI_HASHBITS)
143 #define RSI_HASHMASK (RSI_HASHMAX - 1)
149 char nm_name[LUSTRE_NODEMAP_NAME_LENGTH + 1];
150 wait_queue_head_t waitq;
151 rawobj_t in_handle, in_token;
152 rawobj_t out_handle, out_token;
153 int major_status, minor_status;
156 #ifdef HAVE_CACHE_HEAD_HLIST
157 static struct hlist_head rsi_table[RSI_HASHMAX];
159 static struct cache_head *rsi_table[RSI_HASHMAX];
161 static struct cache_detail rsi_cache;
162 static struct rsi *rsi_update(struct rsi *new, struct rsi *old);
163 static struct rsi *rsi_lookup(struct rsi *item);
165 #ifdef HAVE_CACHE_DETAIL_WRITERS
166 static inline int channel_users(struct cache_detail *cd)
168 return atomic_read(&cd->writers);
171 static inline int channel_users(struct cache_detail *cd)
173 return atomic_read(&cd->readers);
177 static inline int rsi_hash(struct rsi *item)
179 return hash_mem((char *)item->in_handle.data, item->in_handle.len,
181 hash_mem((char *)item->in_token.data, item->in_token.len,
185 static inline int __rsi_match(struct rsi *item, struct rsi *tmp)
187 return (rawobj_equal(&item->in_handle, &tmp->in_handle) &&
188 rawobj_equal(&item->in_token, &tmp->in_token));
191 static void rsi_free(struct rsi *rsi)
193 rawobj_free(&rsi->in_handle);
194 rawobj_free(&rsi->in_token);
195 rawobj_free(&rsi->out_handle);
196 rawobj_free(&rsi->out_token);
199 /* See handle_channel_req() userspace for where the upcall data is read */
200 static void rsi_request(struct cache_detail *cd,
201 struct cache_head *h,
202 char **bpp, int *blen)
204 struct rsi *rsi = container_of(h, struct rsi, h);
207 /* if in_handle is null, provide kernel suggestion */
208 if (rsi->in_handle.len == 0)
209 index = gss_get_next_ctx_index();
211 qword_addhex(bpp, blen, (char *) &rsi->lustre_svc,
212 sizeof(rsi->lustre_svc));
213 qword_addhex(bpp, blen, (char *) &rsi->nid, sizeof(rsi->nid));
214 qword_addhex(bpp, blen, (char *) &index, sizeof(index));
215 qword_addhex(bpp, blen, (char *) rsi->nm_name,
216 strlen(rsi->nm_name) + 1);
217 qword_addhex(bpp, blen, rsi->in_handle.data, rsi->in_handle.len);
218 qword_addhex(bpp, blen, rsi->in_token.data, rsi->in_token.len);
222 #ifdef HAVE_SUNRPC_UPCALL_HAS_3ARGS
223 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
225 return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
229 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
231 return sunrpc_cache_pipe_upcall(cd, h);
235 static inline void __rsi_init(struct rsi *new, struct rsi *item)
237 new->out_handle = RAWOBJ_EMPTY;
238 new->out_token = RAWOBJ_EMPTY;
240 new->in_handle = item->in_handle;
241 item->in_handle = RAWOBJ_EMPTY;
242 new->in_token = item->in_token;
243 item->in_token = RAWOBJ_EMPTY;
245 new->lustre_svc = item->lustre_svc;
246 new->nid = item->nid;
247 memcpy(new->nm_name, item->nm_name, sizeof(item->nm_name));
248 init_waitqueue_head(&new->waitq);
251 static inline void __rsi_update(struct rsi *new, struct rsi *item)
253 LASSERT(new->out_handle.len == 0);
254 LASSERT(new->out_token.len == 0);
256 new->out_handle = item->out_handle;
257 item->out_handle = RAWOBJ_EMPTY;
258 new->out_token = item->out_token;
259 item->out_token = RAWOBJ_EMPTY;
261 new->major_status = item->major_status;
262 new->minor_status = item->minor_status;
265 static void rsi_put(struct kref *ref)
267 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
269 #ifdef HAVE_CACHE_HEAD_HLIST
270 LASSERT(rsi->h.cache_list.next == NULL);
272 LASSERT(rsi->h.next == NULL);
278 static int rsi_match(struct cache_head *a, struct cache_head *b)
280 struct rsi *item = container_of(a, struct rsi, h);
281 struct rsi *tmp = container_of(b, struct rsi, h);
283 return __rsi_match(item, tmp);
286 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
288 struct rsi *new = container_of(cnew, struct rsi, h);
289 struct rsi *item = container_of(citem, struct rsi, h);
291 __rsi_init(new, item);
294 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
296 struct rsi *new = container_of(cnew, struct rsi, h);
297 struct rsi *item = container_of(citem, struct rsi, h);
299 __rsi_update(new, item);
302 static struct cache_head *rsi_alloc(void)
313 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
317 struct rsi rsii, *rsip = NULL;
319 int status = -EINVAL;
323 memset(&rsii, 0, sizeof(rsii));
326 len = qword_get(&mesg, buf, mlen);
329 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
335 len = qword_get(&mesg, buf, mlen);
338 if (rawobj_alloc(&rsii.in_token, buf, len)) {
343 rsip = rsi_lookup(&rsii);
349 expiry = get_expiry(&mesg);
353 len = qword_get(&mesg, buf, mlen);
358 status = kstrtoint(buf, 10, &rsii.major_status);
363 len = qword_get(&mesg, buf, mlen);
369 status = kstrtoint(buf, 10, &rsii.minor_status);
374 len = qword_get(&mesg, buf, mlen);
377 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
383 len = qword_get(&mesg, buf, mlen);
386 if (rawobj_alloc(&rsii.out_token, buf, len)) {
391 rsii.h.expiry_time = expiry;
392 rsip = rsi_update(&rsii, rsip);
397 wake_up_all(&rsip->waitq);
398 cache_put(&rsip->h, &rsi_cache);
404 CERROR("rsi parse error %d\n", status);
408 static struct cache_detail rsi_cache = {
409 .hash_size = RSI_HASHMAX,
410 .hash_table = rsi_table,
411 .name = "auth.sptlrpc.init",
412 .cache_put = rsi_put,
413 #ifndef HAVE_SUNRPC_UPCALL_HAS_3ARGS
414 .cache_request = rsi_request,
416 .cache_upcall = rsi_upcall,
417 .cache_parse = rsi_parse,
420 .update = update_rsi,
424 static struct rsi *rsi_lookup(struct rsi *item)
426 struct cache_head *ch;
427 int hash = rsi_hash(item);
429 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
431 return container_of(ch, struct rsi, h);
436 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
438 struct cache_head *ch;
439 int hash = rsi_hash(new);
441 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
443 return container_of(ch, struct rsi, h);
448 /****************************************
449 * rpc sec context (rsc) cache *
450 ****************************************/
452 #define RSC_HASHBITS (10)
453 #define RSC_HASHMAX (1 << RSC_HASHBITS)
454 #define RSC_HASHMASK (RSC_HASHMAX - 1)
458 struct obd_device *target;
460 struct gss_svc_ctx ctx;
463 #ifdef HAVE_CACHE_HEAD_HLIST
464 static struct hlist_head rsc_table[RSC_HASHMAX];
466 static struct cache_head *rsc_table[RSC_HASHMAX];
468 static struct cache_detail rsc_cache;
469 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
470 static struct rsc *rsc_lookup(struct rsc *item);
472 static void rsc_free(struct rsc *rsci)
474 rawobj_free(&rsci->handle);
475 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
476 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
479 static inline int rsc_hash(struct rsc *rsci)
481 return hash_mem((char *)rsci->handle.data,
482 rsci->handle.len, RSC_HASHBITS);
485 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
487 return rawobj_equal(&new->handle, &tmp->handle);
490 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
492 new->handle = tmp->handle;
493 tmp->handle = RAWOBJ_EMPTY;
496 memset(&new->ctx, 0, sizeof(new->ctx));
497 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
500 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
503 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
504 tmp->ctx.gsc_mechctx = NULL;
506 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
507 spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
510 static void rsc_put(struct kref *ref)
512 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
514 #ifdef HAVE_CACHE_HEAD_HLIST
515 LASSERT(rsci->h.cache_list.next == NULL);
517 LASSERT(rsci->h.next == NULL);
523 static int rsc_match(struct cache_head *a, struct cache_head *b)
525 struct rsc *new = container_of(a, struct rsc, h);
526 struct rsc *tmp = container_of(b, struct rsc, h);
528 return __rsc_match(new, tmp);
531 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
533 struct rsc *new = container_of(cnew, struct rsc, h);
534 struct rsc *tmp = container_of(ctmp, struct rsc, h);
536 __rsc_init(new, tmp);
539 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
541 struct rsc *new = container_of(cnew, struct rsc, h);
542 struct rsc *tmp = container_of(ctmp, struct rsc, h);
544 __rsc_update(new, tmp);
547 static struct cache_head * rsc_alloc(void)
558 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
561 int len, rv, tmp_int;
562 struct rsc rsci, *rscp = NULL;
564 int status = -EINVAL;
565 struct gss_api_mech *gm = NULL;
567 memset(&rsci, 0, sizeof(rsci));
570 len = qword_get(&mesg, buf, mlen);
571 if (len < 0) goto out;
573 if (rawobj_alloc(&rsci.handle, buf, len))
578 expiry = get_expiry(&mesg);
584 rv = get_int(&mesg, &tmp_int);
586 CERROR("fail to get remote flag\n");
589 rsci.ctx.gsc_remote = (tmp_int != 0);
592 rv = get_int(&mesg, &tmp_int);
594 CERROR("fail to get root user flag\n");
597 rsci.ctx.gsc_usr_root = (tmp_int != 0);
600 rv = get_int(&mesg, &tmp_int);
602 CERROR("fail to get mds user flag\n");
605 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
608 rv = get_int(&mesg, &tmp_int);
610 CERROR("fail to get oss user flag\n");
613 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
616 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
618 CERROR("fail to get mapped uid\n");
622 rscp = rsc_lookup(&rsci);
626 /* uid, or NEGATIVE */
627 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
631 CERROR("NOENT? set rsc entry negative\n");
632 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
638 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
642 len = qword_get(&mesg, buf, mlen);
645 gm = lgss_name_to_mech(buf);
646 status = -EOPNOTSUPP;
651 /* mech-specific data: */
652 len = qword_get(&mesg, buf, mlen);
657 tmp_buf.data = (unsigned char *)buf;
658 if (lgss_import_sec_context(&tmp_buf, gm,
659 &rsci.ctx.gsc_mechctx))
662 /* set to seconds since machine booted */
663 expiry = ktime_get_seconds();
665 /* currently the expiry time passed down from user-space
666 * is invalid, here we retrive it from mech.
668 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
669 CERROR("unable to get expire time, drop it\n");
673 /* ctx_expiry is the number of seconds since Jan 1 1970.
674 * We want just the number of seconds into the future.
676 expiry += ctx_expiry - ktime_get_real_seconds();
679 rsci.h.expiry_time = expiry;
680 rscp = rsc_update(&rsci, rscp);
687 cache_put(&rscp->h, &rsc_cache);
692 CERROR("parse rsc error %d\n", status);
696 static struct cache_detail rsc_cache = {
697 .hash_size = RSC_HASHMAX,
698 .hash_table = rsc_table,
699 .name = "auth.sptlrpc.context",
700 .cache_put = rsc_put,
701 .cache_parse = rsc_parse,
704 .update = update_rsc,
708 static struct rsc *rsc_lookup(struct rsc *item)
710 struct cache_head *ch;
711 int hash = rsc_hash(item);
713 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
715 return container_of(ch, struct rsc, h);
720 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
722 struct cache_head *ch;
723 int hash = rsc_hash(new);
725 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
727 return container_of(ch, struct rsc, h);
732 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
734 /****************************************
736 ****************************************/
738 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
743 memset(&rsci, 0, sizeof(rsci));
744 if (rawobj_dup(&rsci.handle, handle))
747 found = rsc_lookup(&rsci);
751 if (cache_check(&rsc_cache, &found->h, NULL))
756 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
757 struct gss_sec *gsec,
758 struct gss_cli_ctx *gctx)
760 struct rsc rsci, *rscp = NULL;
766 memset(&rsci, 0, sizeof(rsci));
768 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
769 sizeof(gsec->gs_rvs_hdl)))
770 GOTO(out, rc = -ENOMEM);
772 rscp = rsc_lookup(&rsci);
774 GOTO(out, rc = -ENOMEM);
776 major = lgss_copy_reverse_context(gctx->gc_mechctx,
777 &rsci.ctx.gsc_mechctx);
778 if (major != GSS_S_COMPLETE)
779 GOTO(out, rc = -ENOMEM);
781 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
782 CERROR("unable to get expire time, drop it\n");
783 GOTO(out, rc = -EINVAL);
785 rsci.h.expiry_time = (time_t) ctx_expiry;
787 switch (imp->imp_obd->u.cli.cl_sp_to) {
789 rsci.ctx.gsc_usr_mds = 1;
792 rsci.ctx.gsc_usr_oss = 1;
795 rsci.ctx.gsc_usr_root = 1;
798 /* by convention, all 3 set to 1 means MGS */
799 rsci.ctx.gsc_usr_mds = 1;
800 rsci.ctx.gsc_usr_oss = 1;
801 rsci.ctx.gsc_usr_root = 1;
807 rscp = rsc_update(&rsci, rscp);
809 GOTO(out, rc = -ENOMEM);
811 rscp->target = imp->imp_obd;
812 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
814 CWARN("create reverse svc ctx %p to %s: idx %#llx\n",
815 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
819 cache_put(&rscp->h, &rsc_cache);
823 CERROR("create reverse svc ctx: idx %#llx, rc %d\n",
824 gsec->gs_rvs_hdl, rc);
828 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
830 const time64_t expire = 20;
833 rscp = gss_svc_searchbyctx(handle);
835 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
838 rscp->h.expiry_time = ktime_get_real_seconds() + expire;
839 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
844 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
846 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
848 return rawobj_dup(handle, &rscp->handle);
851 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
855 rscp = gss_svc_searchbyctx(handle);
857 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
858 &rscp->ctx, rscp, seq + 1);
860 rscp->ctx.gsc_rvs_seq = seq + 1;
861 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
866 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
870 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
872 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
873 struct gss_svc_reqctx *grctx,
874 struct gss_wire_ctx *gw,
875 struct obd_device *target,
880 struct ptlrpc_reply_state *rs;
881 struct rsc *rsci = NULL;
882 struct rsi *rsip = NULL, rsikey;
883 wait_queue_entry_t wait;
884 int replen = sizeof(struct ptlrpc_body);
885 struct gss_rep_header *rephdr;
887 int rc = SECSVC_DROP;
890 memset(&rsikey, 0, sizeof(rsikey));
891 rsikey.lustre_svc = lustre_svc;
892 /* In case of MR, rq_peer is not the NID from which request is received,
893 * but primary NID of peer.
894 * So we need rq_source, which contains the NID actually in use.
896 rsikey.nid = (__u64) req->rq_source.nid;
897 nodemap_test_nid(req->rq_peer.nid, rsikey.nm_name,
898 sizeof(rsikey.nm_name));
900 /* duplicate context handle. for INIT it always 0 */
901 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
902 CERROR("fail to dup context handle\n");
906 if (rawobj_dup(&rsikey.in_token, in_token)) {
907 CERROR("can't duplicate token\n");
908 rawobj_free(&rsikey.in_handle);
912 rsip = rsi_lookup(&rsikey);
915 CERROR("error in rsi_lookup.\n");
917 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
918 rc = SECSVC_COMPLETE;
923 cache_get(&rsip->h); /* take an extra ref */
924 init_waitqueue_head(&rsip->waitq);
925 init_waitqueue_entry(&wait, current);
926 add_wait_queue(&rsip->waitq, &wait);
929 /* Note each time cache_check() will drop a reference if return
930 * non-zero. We hold an extra reference on initial rsip, but must
931 * take care of following calls. */
932 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
941 read_lock(&rsi_cache.hash_lock);
942 valid = test_bit(CACHE_VALID, &rsip->h.flags);
944 set_current_state(TASK_INTERRUPTIBLE);
945 read_unlock(&rsi_cache.hash_lock);
948 unsigned long jiffies;
949 jiffies = msecs_to_jiffies(MSEC_PER_SEC *
950 GSS_SVC_UPCALL_TIMEOUT);
951 schedule_timeout(jiffies);
956 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
960 CDEBUG(D_SEC, "cache_check return ENOENT, drop\n");
963 /* if not the first check, we have to release the extra
964 * reference we just added on it. */
966 cache_put(&rsip->h, &rsi_cache);
967 CDEBUG(D_SEC, "cache_check is good\n");
971 remove_wait_queue(&rsip->waitq, &wait);
972 cache_put(&rsip->h, &rsi_cache);
975 GOTO(out, rc = SECSVC_DROP);
978 rsci = gss_svc_searchbyctx(&rsip->out_handle);
980 CERROR("authentication failed\n");
982 /* gss mechanism returned major and minor code so we return
983 * those in error message */
984 if (!gss_pack_err_notify(req, rsip->major_status,
986 rc = SECSVC_COMPLETE;
991 grctx->src_ctx = &rsci->ctx;
994 if (gw->gw_flags & LUSTRE_GSS_PACK_KCSUM) {
995 grctx->src_ctx->gsc_mechctx->hash_func = gss_digest_hash;
996 } else if (!strcmp(grctx->src_ctx->gsc_mechctx->mech_type->gm_name,
998 !krb5_allow_old_client_csum) {
999 CWARN("%s: deny connection from '%s' due to missing 'krb_csum' feature, set 'sptlrpc.gss.krb5_allow_old_client_csum=1' to allow, but recommend client upgrade: rc = %d\n",
1000 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
1002 GOTO(out, rc = SECSVC_DROP);
1004 grctx->src_ctx->gsc_mechctx->hash_func =
1005 gss_digest_hash_compat;
1008 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
1009 CERROR("failed duplicate reverse handle\n");
1013 rsci->target = target;
1015 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
1016 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
1018 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
1019 CERROR("handle size %u too large\n", rsip->out_handle.len);
1020 GOTO(out, rc = SECSVC_DROP);
1023 grctx->src_init = 1;
1024 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
1026 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
1028 CERROR("failed to pack reply: %d\n", rc);
1029 GOTO(out, rc = SECSVC_DROP);
1032 rs = req->rq_reply_state;
1033 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
1034 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
1035 sizeof(*rephdr) + rsip->out_handle.len);
1036 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
1038 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
1039 rephdr->gh_version = PTLRPC_GSS_VERSION;
1040 rephdr->gh_flags = 0;
1041 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
1042 rephdr->gh_major = rsip->major_status;
1043 rephdr->gh_minor = rsip->minor_status;
1044 rephdr->gh_seqwin = GSS_SEQ_WIN;
1045 rephdr->gh_handle.len = rsip->out_handle.len;
1046 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
1047 rsip->out_handle.len);
1049 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
1050 rsip->out_token.len);
1052 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1053 rsip->out_token.len, 0);
1058 /* it looks like here we should put rsip also, but this mess up
1059 * with NFS cache mgmt code... FIXME
1062 * rsi_put(&rsip->h, &rsi_cache); */
1065 /* if anything went wrong, we don't keep the context too */
1066 if (rc != SECSVC_OK)
1067 set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1069 CDEBUG(D_SEC, "create rsc with idx %#llx\n",
1070 gss_handle_to_u64(&rsci->handle));
1072 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1077 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1078 struct gss_wire_ctx *gw)
1082 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1084 CWARN("Invalid gss ctx idx %#llx from %s\n",
1085 gss_handle_to_u64(&gw->gw_handle),
1086 libcfs_nid2str(req->rq_peer.nid));
1093 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1095 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1097 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1100 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1102 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1104 /* can't be found */
1105 set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1106 /* to be removed at next scan */
1107 rsc->h.expiry_time = 1;
1110 int __init gss_init_svc_upcall(void)
1114 spin_lock_init(&__ctx_index_lock);
1116 * this helps reducing context index confliction. after server reboot,
1117 * conflicting request from clients might be filtered out by initial
1118 * sequence number checking, thus no chance to sent error notification
1121 cfs_get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1123 rc = _cache_register_net(&rsi_cache, &init_net);
1127 rc = _cache_register_net(&rsc_cache, &init_net);
1129 _cache_unregister_net(&rsi_cache, &init_net);
1133 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1134 * the init upcall channel, otherwise there's big chance that the first
1135 * upcall issued before the channel be opened thus nfsv4 cache code will
1136 * drop the request directly, thus lead to unnecessary recovery time.
1137 * Here we wait at minimum 1.5 seconds.
1139 for (i = 0; i < 6; i++) {
1140 if (channel_users(&rsi_cache) > 0)
1142 set_current_state(TASK_UNINTERRUPTIBLE);
1143 LASSERT(msecs_to_jiffies(MSEC_PER_SEC / 4) > 0);
1144 schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC / 4));
1147 if (channel_users(&rsi_cache) == 0)
1148 CWARN("Init channel is not opened by lsvcgssd, following "
1149 "request might be dropped until lsvcgssd is active\n");
1154 void gss_exit_svc_upcall(void)
1156 cache_purge(&rsi_cache);
1157 _cache_unregister_net(&rsi_cache, &init_net);
1159 cache_purge(&rsc_cache);
1160 _cache_unregister_net(&rsc_cache, &init_net);