2 * Modifications for Lustre
4 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
6 * Copyright (c) 2012, 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
52 #include <linux/types.h>
53 #include <linux/init.h>
54 #include <linux/module.h>
55 #include <linux/slab.h>
56 #include <linux/hash.h>
57 #include <linux/mutex.h>
58 #include <linux/sunrpc/cache.h>
60 #include <liblustre.h>
64 #include <obd_class.h>
65 #include <obd_support.h>
66 #include <lustre/lustre_idl.h>
67 #include <lustre_net.h>
68 #include <lustre_import.h>
69 #include <lustre_sec.h>
72 #include "gss_internal.h"
75 #define GSS_SVC_UPCALL_TIMEOUT (20)
77 static spinlock_t __ctx_index_lock;
78 static __u64 __ctx_index;
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 /****************************************
139 ****************************************/
141 #define RSI_HASHBITS (6)
142 #define RSI_HASHMAX (1 << RSI_HASHBITS)
143 #define RSI_HASHMASK (RSI_HASHMAX - 1)
149 wait_queue_head_t waitq;
150 rawobj_t in_handle, in_token;
151 rawobj_t out_handle, out_token;
152 int major_status, minor_status;
155 static struct cache_head *rsi_table[RSI_HASHMAX];
156 static struct cache_detail rsi_cache;
157 static struct rsi *rsi_update(struct rsi *new, struct rsi *old);
158 static struct rsi *rsi_lookup(struct rsi *item);
160 static inline int rsi_hash(struct rsi *item)
162 return hash_mem((char *)item->in_handle.data, item->in_handle.len,
164 hash_mem((char *)item->in_token.data, item->in_token.len,
168 static inline int __rsi_match(struct rsi *item, struct rsi *tmp)
170 return (rawobj_equal(&item->in_handle, &tmp->in_handle) &&
171 rawobj_equal(&item->in_token, &tmp->in_token));
174 static void rsi_free(struct rsi *rsi)
176 rawobj_free(&rsi->in_handle);
177 rawobj_free(&rsi->in_token);
178 rawobj_free(&rsi->out_handle);
179 rawobj_free(&rsi->out_token);
182 static void rsi_request(struct cache_detail *cd,
183 struct cache_head *h,
184 char **bpp, int *blen)
186 struct rsi *rsi = container_of(h, struct rsi, h);
189 /* if in_handle is null, provide kernel suggestion */
190 if (rsi->in_handle.len == 0)
191 index = gss_get_next_ctx_index();
193 qword_addhex(bpp, blen, (char *) &rsi->lustre_svc,
194 sizeof(rsi->lustre_svc));
195 qword_addhex(bpp, blen, (char *) &rsi->nid, sizeof(rsi->nid));
196 qword_addhex(bpp, blen, (char *) &index, sizeof(index));
197 qword_addhex(bpp, blen, rsi->in_handle.data, rsi->in_handle.len);
198 qword_addhex(bpp, blen, rsi->in_token.data, rsi->in_token.len);
202 #ifdef HAVE_SUNRPC_UPCALL_HAS_3ARGS
203 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
205 return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
209 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
211 return sunrpc_cache_pipe_upcall(cd, h);
215 static inline void __rsi_init(struct rsi *new, struct rsi *item)
217 new->out_handle = RAWOBJ_EMPTY;
218 new->out_token = RAWOBJ_EMPTY;
220 new->in_handle = item->in_handle;
221 item->in_handle = RAWOBJ_EMPTY;
222 new->in_token = item->in_token;
223 item->in_token = RAWOBJ_EMPTY;
225 new->lustre_svc = item->lustre_svc;
226 new->nid = item->nid;
227 init_waitqueue_head(&new->waitq);
230 static inline void __rsi_update(struct rsi *new, struct rsi *item)
232 LASSERT(new->out_handle.len == 0);
233 LASSERT(new->out_token.len == 0);
235 new->out_handle = item->out_handle;
236 item->out_handle = RAWOBJ_EMPTY;
237 new->out_token = item->out_token;
238 item->out_token = RAWOBJ_EMPTY;
240 new->major_status = item->major_status;
241 new->minor_status = item->minor_status;
244 static void rsi_put(struct kref *ref)
246 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
248 LASSERT(rsi->h.next == NULL);
253 static int rsi_match(struct cache_head *a, struct cache_head *b)
255 struct rsi *item = container_of(a, struct rsi, h);
256 struct rsi *tmp = container_of(b, struct rsi, h);
258 return __rsi_match(item, tmp);
261 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
263 struct rsi *new = container_of(cnew, struct rsi, h);
264 struct rsi *item = container_of(citem, struct rsi, h);
266 __rsi_init(new, item);
269 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
271 struct rsi *new = container_of(cnew, struct rsi, h);
272 struct rsi *item = container_of(citem, struct rsi, h);
274 __rsi_update(new, item);
277 static struct cache_head *rsi_alloc(void)
288 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
293 struct rsi rsii, *rsip = NULL;
295 int status = -EINVAL;
299 memset(&rsii, 0, sizeof(rsii));
302 len = qword_get(&mesg, buf, mlen);
305 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
311 len = qword_get(&mesg, buf, mlen);
314 if (rawobj_alloc(&rsii.in_token, buf, len)) {
319 rsip = rsi_lookup(&rsii);
325 expiry = get_expiry(&mesg);
329 len = qword_get(&mesg, buf, mlen);
334 rsii.major_status = simple_strtol(buf, &ep, 10);
339 len = qword_get(&mesg, buf, mlen);
342 rsii.minor_status = simple_strtol(buf, &ep, 10);
347 len = qword_get(&mesg, buf, mlen);
350 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
356 len = qword_get(&mesg, buf, mlen);
359 if (rawobj_alloc(&rsii.out_token, buf, len)) {
364 rsii.h.expiry_time = expiry;
365 rsip = rsi_update(&rsii, rsip);
370 wake_up_all(&rsip->waitq);
371 cache_put(&rsip->h, &rsi_cache);
377 CERROR("rsi parse error %d\n", status);
381 static struct cache_detail rsi_cache = {
382 .hash_size = RSI_HASHMAX,
383 .hash_table = rsi_table,
384 .name = "auth.sptlrpc.init",
385 .cache_put = rsi_put,
386 #ifndef HAVE_SUNRPC_UPCALL_HAS_3ARGS
387 .cache_request = rsi_request,
389 .cache_upcall = rsi_upcall,
390 .cache_parse = rsi_parse,
393 .update = update_rsi,
397 static struct rsi *rsi_lookup(struct rsi *item)
399 struct cache_head *ch;
400 int hash = rsi_hash(item);
402 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
404 return container_of(ch, struct rsi, h);
409 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
411 struct cache_head *ch;
412 int hash = rsi_hash(new);
414 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
416 return container_of(ch, struct rsi, h);
421 /****************************************
423 ****************************************/
425 #define RSC_HASHBITS (10)
426 #define RSC_HASHMAX (1 << RSC_HASHBITS)
427 #define RSC_HASHMASK (RSC_HASHMAX - 1)
431 struct obd_device *target;
433 struct gss_svc_ctx ctx;
436 static struct cache_head *rsc_table[RSC_HASHMAX];
437 static struct cache_detail rsc_cache;
438 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
439 static struct rsc *rsc_lookup(struct rsc *item);
441 static void rsc_free(struct rsc *rsci)
443 rawobj_free(&rsci->handle);
444 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
445 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
448 static inline int rsc_hash(struct rsc *rsci)
450 return hash_mem((char *)rsci->handle.data,
451 rsci->handle.len, RSC_HASHBITS);
454 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
456 return rawobj_equal(&new->handle, &tmp->handle);
459 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
461 new->handle = tmp->handle;
462 tmp->handle = RAWOBJ_EMPTY;
465 memset(&new->ctx, 0, sizeof(new->ctx));
466 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
469 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
472 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
473 tmp->ctx.gsc_mechctx = NULL;
475 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
476 spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
479 static void rsc_put(struct kref *ref)
481 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
483 LASSERT(rsci->h.next == NULL);
488 static int rsc_match(struct cache_head *a, struct cache_head *b)
490 struct rsc *new = container_of(a, struct rsc, h);
491 struct rsc *tmp = container_of(b, struct rsc, h);
493 return __rsc_match(new, tmp);
496 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
498 struct rsc *new = container_of(cnew, struct rsc, h);
499 struct rsc *tmp = container_of(ctmp, struct rsc, h);
501 __rsc_init(new, tmp);
504 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
506 struct rsc *new = container_of(cnew, struct rsc, h);
507 struct rsc *tmp = container_of(ctmp, struct rsc, h);
509 __rsc_update(new, tmp);
512 static struct cache_head * rsc_alloc(void)
523 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
526 int len, rv, tmp_int;
527 struct rsc rsci, *rscp = NULL;
529 int status = -EINVAL;
530 struct gss_api_mech *gm = NULL;
532 memset(&rsci, 0, sizeof(rsci));
535 len = qword_get(&mesg, buf, mlen);
536 if (len < 0) goto out;
538 if (rawobj_alloc(&rsci.handle, buf, len))
543 expiry = get_expiry(&mesg);
549 rv = get_int(&mesg, &tmp_int);
551 CERROR("fail to get remote flag\n");
554 rsci.ctx.gsc_remote = (tmp_int != 0);
557 rv = get_int(&mesg, &tmp_int);
559 CERROR("fail to get oss user flag\n");
562 rsci.ctx.gsc_usr_root = (tmp_int != 0);
565 rv = get_int(&mesg, &tmp_int);
567 CERROR("fail to get mds user flag\n");
570 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
573 rv = get_int(&mesg, &tmp_int);
575 CERROR("fail to get oss user flag\n");
578 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
581 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
583 CERROR("fail to get mapped uid\n");
587 rscp = rsc_lookup(&rsci);
591 /* uid, or NEGATIVE */
592 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
596 CERROR("NOENT? set rsc entry negative\n");
597 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
600 unsigned long ctx_expiry;
603 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
607 len = qword_get(&mesg, buf, mlen);
610 gm = lgss_name_to_mech(buf);
611 status = -EOPNOTSUPP;
616 /* mech-specific data: */
617 len = qword_get(&mesg, buf, mlen);
622 tmp_buf.data = (unsigned char *)buf;
623 if (lgss_import_sec_context(&tmp_buf, gm,
624 &rsci.ctx.gsc_mechctx))
627 /* currently the expiry time passed down from user-space
628 * is invalid, here we retrive it from mech. */
629 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
630 CERROR("unable to get expire time, drop it\n");
633 expiry = (time_t) ctx_expiry;
636 rsci.h.expiry_time = expiry;
637 rscp = rsc_update(&rsci, rscp);
644 cache_put(&rscp->h, &rsc_cache);
649 CERROR("parse rsc error %d\n", status);
653 static struct cache_detail rsc_cache = {
654 .hash_size = RSC_HASHMAX,
655 .hash_table = rsc_table,
656 .name = "auth.sptlrpc.context",
657 .cache_put = rsc_put,
658 .cache_parse = rsc_parse,
661 .update = update_rsc,
665 static struct rsc *rsc_lookup(struct rsc *item)
667 struct cache_head *ch;
668 int hash = rsc_hash(item);
670 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
672 return container_of(ch, struct rsc, h);
677 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
679 struct cache_head *ch;
680 int hash = rsc_hash(new);
682 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
684 return container_of(ch, struct rsc, h);
689 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
691 /****************************************
693 ****************************************/
695 typedef int rsc_entry_match(struct rsc *rscp, long data);
697 static void rsc_flush(rsc_entry_match *match, long data)
699 struct cache_head **ch;
704 write_lock(&rsc_cache.hash_lock);
705 for (n = 0; n < RSC_HASHMAX; n++) {
706 for (ch = &rsc_cache.hash_table[n]; *ch;) {
707 rscp = container_of(*ch, struct rsc, h);
709 if (!match(rscp, data)) {
714 /* it seems simply set NEGATIVE doesn't work */
718 set_bit(CACHE_NEGATIVE, &rscp->h.flags);
719 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
723 write_unlock(&rsc_cache.hash_lock);
727 static int match_uid(struct rsc *rscp, long uid)
731 return ((int) rscp->ctx.gsc_uid == (int) uid);
734 static int match_target(struct rsc *rscp, long target)
736 return (rscp->target == (struct obd_device *) target);
739 static inline void rsc_flush_uid(int uid)
742 CWARN("flush all gss contexts...\n");
744 rsc_flush(match_uid, (long) uid);
747 static inline void rsc_flush_target(struct obd_device *target)
749 rsc_flush(match_target, (long) target);
752 void gss_secsvc_flush(struct obd_device *target)
754 rsc_flush_target(target);
756 EXPORT_SYMBOL(gss_secsvc_flush);
758 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
763 memset(&rsci, 0, sizeof(rsci));
764 if (rawobj_dup(&rsci.handle, handle))
767 found = rsc_lookup(&rsci);
771 if (cache_check(&rsc_cache, &found->h, NULL))
776 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
777 struct gss_sec *gsec,
778 struct gss_cli_ctx *gctx)
780 struct rsc rsci, *rscp = NULL;
781 unsigned long ctx_expiry;
786 memset(&rsci, 0, sizeof(rsci));
788 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
789 sizeof(gsec->gs_rvs_hdl)))
790 GOTO(out, rc = -ENOMEM);
792 rscp = rsc_lookup(&rsci);
794 GOTO(out, rc = -ENOMEM);
796 major = lgss_copy_reverse_context(gctx->gc_mechctx,
797 &rsci.ctx.gsc_mechctx);
798 if (major != GSS_S_COMPLETE)
799 GOTO(out, rc = -ENOMEM);
801 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
802 CERROR("unable to get expire time, drop it\n");
803 GOTO(out, rc = -EINVAL);
805 rsci.h.expiry_time = (time_t) ctx_expiry;
807 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
808 rsci.ctx.gsc_usr_mds = 1;
809 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
810 rsci.ctx.gsc_usr_oss = 1;
812 rsci.ctx.gsc_usr_root = 1;
814 rscp = rsc_update(&rsci, rscp);
816 GOTO(out, rc = -ENOMEM);
818 rscp->target = imp->imp_obd;
819 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
821 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
822 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
826 cache_put(&rscp->h, &rsc_cache);
830 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
831 gsec->gs_rvs_hdl, rc);
835 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
837 const cfs_time_t expire = 20;
840 rscp = gss_svc_searchbyctx(handle);
842 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
845 rscp->h.expiry_time = cfs_time_current_sec() + expire;
846 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
851 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
853 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
855 return rawobj_dup(handle, &rscp->handle);
858 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
862 rscp = gss_svc_searchbyctx(handle);
864 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
865 &rscp->ctx, rscp, seq + 1);
867 rscp->ctx.gsc_rvs_seq = seq + 1;
868 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
873 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
877 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
879 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
880 struct gss_svc_reqctx *grctx,
881 struct gss_wire_ctx *gw,
882 struct obd_device *target,
887 struct ptlrpc_reply_state *rs;
888 struct rsc *rsci = NULL;
889 struct rsi *rsip = NULL, rsikey;
891 int replen = sizeof(struct ptlrpc_body);
892 struct gss_rep_header *rephdr;
894 int rc = SECSVC_DROP;
897 memset(&rsikey, 0, sizeof(rsikey));
898 rsikey.lustre_svc = lustre_svc;
899 rsikey.nid = (__u64) req->rq_peer.nid;
901 /* duplicate context handle. for INIT it always 0 */
902 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
903 CERROR("fail to dup context handle\n");
907 if (rawobj_dup(&rsikey.in_token, in_token)) {
908 CERROR("can't duplicate token\n");
909 rawobj_free(&rsikey.in_handle);
913 rsip = rsi_lookup(&rsikey);
916 CERROR("error in rsi_lookup.\n");
918 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
919 rc = SECSVC_COMPLETE;
924 cache_get(&rsip->h); /* take an extra ref */
925 init_waitqueue_head(&rsip->waitq);
926 init_waitqueue_entry_current(&wait);
927 add_wait_queue(&rsip->waitq, &wait);
930 /* Note each time cache_check() will drop a reference if return
931 * non-zero. We hold an extra reference on initial rsip, but must
932 * take care of following calls. */
933 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
942 read_lock(&rsi_cache.hash_lock);
943 valid = test_bit(CACHE_VALID, &rsip->h.flags);
945 set_current_state(TASK_INTERRUPTIBLE);
946 read_unlock(&rsi_cache.hash_lock);
949 schedule_timeout(GSS_SVC_UPCALL_TIMEOUT *
955 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
959 CWARN("cache_check return ENOENT, drop\n");
962 /* if not the first check, we have to release the extra
963 * reference we just added on it. */
965 cache_put(&rsip->h, &rsi_cache);
966 CDEBUG(D_SEC, "cache_check is good\n");
970 remove_wait_queue(&rsip->waitq, &wait);
971 cache_put(&rsip->h, &rsi_cache);
974 GOTO(out, rc = SECSVC_DROP);
977 rsci = gss_svc_searchbyctx(&rsip->out_handle);
979 CERROR("authentication failed\n");
981 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
982 rc = SECSVC_COMPLETE;
987 grctx->src_ctx = &rsci->ctx;
990 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
991 CERROR("failed duplicate reverse handle\n");
995 rsci->target = target;
997 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
998 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
1000 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
1001 CERROR("handle size %u too large\n", rsip->out_handle.len);
1002 GOTO(out, rc = SECSVC_DROP);
1005 grctx->src_init = 1;
1006 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
1008 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
1010 CERROR("failed to pack reply: %d\n", rc);
1011 GOTO(out, rc = SECSVC_DROP);
1014 rs = req->rq_reply_state;
1015 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
1016 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
1017 sizeof(*rephdr) + rsip->out_handle.len);
1018 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
1020 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
1021 rephdr->gh_version = PTLRPC_GSS_VERSION;
1022 rephdr->gh_flags = 0;
1023 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
1024 rephdr->gh_major = rsip->major_status;
1025 rephdr->gh_minor = rsip->minor_status;
1026 rephdr->gh_seqwin = GSS_SEQ_WIN;
1027 rephdr->gh_handle.len = rsip->out_handle.len;
1028 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
1029 rsip->out_handle.len);
1031 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
1032 rsip->out_token.len);
1034 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1035 rsip->out_token.len, 0);
1040 /* it looks like here we should put rsip also, but this mess up
1041 * with NFS cache mgmt code... FIXME */
1044 rsi_put(&rsip->h, &rsi_cache);
1048 /* if anything went wrong, we don't keep the context too */
1049 if (rc != SECSVC_OK)
1050 set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1052 CDEBUG(D_SEC, "create rsc with idx "LPX64"\n",
1053 gss_handle_to_u64(&rsci->handle));
1055 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1060 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1061 struct gss_wire_ctx *gw)
1065 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1067 CWARN("Invalid gss ctx idx "LPX64" from %s\n",
1068 gss_handle_to_u64(&gw->gw_handle),
1069 libcfs_nid2str(req->rq_peer.nid));
1076 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1078 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1080 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1083 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1085 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1087 /* can't be found */
1088 set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1089 /* to be removed at next scan */
1090 rsc->h.expiry_time = 1;
1093 int __init gss_init_svc_upcall(void)
1097 spin_lock_init(&__ctx_index_lock);
1099 * this helps reducing context index confliction. after server reboot,
1100 * conflicting request from clients might be filtered out by initial
1101 * sequence number checking, thus no chance to sent error notification
1104 cfs_get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1106 rc = _cache_register_net(&rsi_cache, &init_net);
1110 rc = _cache_register_net(&rsc_cache, &init_net);
1112 _cache_unregister_net(&rsi_cache, &init_net);
1116 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1117 * the init upcall channel, otherwise there's big chance that the first
1118 * upcall issued before the channel be opened thus nfsv4 cache code will
1119 * drop the request direclty, thus lead to unnecessary recovery time.
1120 * here we wait at miximum 1.5 seconds. */
1121 for (i = 0; i < 6; i++) {
1122 if (atomic_read(&rsi_cache.readers) > 0)
1124 set_current_state(TASK_UNINTERRUPTIBLE);
1126 schedule_timeout(HZ / 4);
1129 if (atomic_read(&rsi_cache.readers) == 0)
1130 CWARN("Init channel is not opened by lsvcgssd, following "
1131 "request might be dropped until lsvcgssd is active\n");
1136 void gss_exit_svc_upcall(void)
1138 cache_purge(&rsi_cache);
1139 _cache_unregister_net(&rsi_cache, &init_net);
1141 cache_purge(&rsc_cache);
1142 _cache_unregister_net(&rsc_cache, &init_net);