1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Modifications for Lustre
6 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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 cfs_spinlock_t __ctx_index_lock;
78 static __u64 __ctx_index;
80 __u64 gss_get_next_ctx_index(void)
84 cfs_spin_lock(&__ctx_index_lock);
86 cfs_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 = cfs_hash_long(hash^l, BITS_PER_LONG);
112 return hash >> (BITS_PER_LONG - bits);
115 /****************************************
117 ****************************************/
119 #define RSI_HASHBITS (6)
120 #define RSI_HASHMAX (1 << RSI_HASHBITS)
121 #define RSI_HASHMASK (RSI_HASHMAX - 1)
128 rawobj_t in_handle, in_token;
129 rawobj_t out_handle, out_token;
130 int major_status, minor_status;
133 static struct cache_head *rsi_table[RSI_HASHMAX];
134 static struct cache_detail rsi_cache;
135 #ifdef HAVE_SUNRPC_CACHE_V2
136 static struct rsi *rsi_update(struct rsi *new, struct rsi *old);
137 static struct rsi *rsi_lookup(struct rsi *item);
139 static struct rsi *rsi_lookup(struct rsi *item, int set);
142 static inline int rsi_hash(struct rsi *item)
144 return hash_mem((char *)item->in_handle.data, item->in_handle.len,
146 hash_mem((char *)item->in_token.data, item->in_token.len,
150 static inline int __rsi_match(struct rsi *item, struct rsi *tmp)
152 return (rawobj_equal(&item->in_handle, &tmp->in_handle) &&
153 rawobj_equal(&item->in_token, &tmp->in_token));
156 static void rsi_free(struct rsi *rsi)
158 rawobj_free(&rsi->in_handle);
159 rawobj_free(&rsi->in_token);
160 rawobj_free(&rsi->out_handle);
161 rawobj_free(&rsi->out_token);
164 static void rsi_request(struct cache_detail *cd,
165 struct cache_head *h,
166 char **bpp, int *blen)
168 struct rsi *rsi = container_of(h, struct rsi, h);
171 /* if in_handle is null, provide kernel suggestion */
172 if (rsi->in_handle.len == 0)
173 index = gss_get_next_ctx_index();
175 qword_addhex(bpp, blen, (char *) &rsi->lustre_svc,
176 sizeof(rsi->lustre_svc));
177 qword_addhex(bpp, blen, (char *) &rsi->nid, sizeof(rsi->nid));
178 qword_addhex(bpp, blen, (char *) &index, sizeof(index));
179 qword_addhex(bpp, blen, rsi->in_handle.data, rsi->in_handle.len);
180 qword_addhex(bpp, blen, rsi->in_token.data, rsi->in_token.len);
184 #ifdef HAVE_CACHE_UPCALL
185 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
187 return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
191 static inline void __rsi_init(struct rsi *new, struct rsi *item)
193 new->out_handle = RAWOBJ_EMPTY;
194 new->out_token = RAWOBJ_EMPTY;
196 new->in_handle = item->in_handle;
197 item->in_handle = RAWOBJ_EMPTY;
198 new->in_token = item->in_token;
199 item->in_token = RAWOBJ_EMPTY;
201 new->lustre_svc = item->lustre_svc;
202 new->nid = item->nid;
203 cfs_waitq_init(&new->waitq);
206 static inline void __rsi_update(struct rsi *new, struct rsi *item)
208 LASSERT(new->out_handle.len == 0);
209 LASSERT(new->out_token.len == 0);
211 new->out_handle = item->out_handle;
212 item->out_handle = RAWOBJ_EMPTY;
213 new->out_token = item->out_token;
214 item->out_token = RAWOBJ_EMPTY;
216 new->major_status = item->major_status;
217 new->minor_status = item->minor_status;
220 #ifdef HAVE_SUNRPC_CACHE_V2
222 static void rsi_put(struct kref *ref)
224 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
226 LASSERT(rsi->h.next == NULL);
231 static int rsi_match(struct cache_head *a, struct cache_head *b)
233 struct rsi *item = container_of(a, struct rsi, h);
234 struct rsi *tmp = container_of(b, struct rsi, h);
236 return __rsi_match(item, tmp);
239 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
241 struct rsi *new = container_of(cnew, struct rsi, h);
242 struct rsi *item = container_of(citem, struct rsi, h);
244 __rsi_init(new, item);
247 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
249 struct rsi *new = container_of(cnew, struct rsi, h);
250 struct rsi *item = container_of(citem, struct rsi, h);
252 __rsi_update(new, item);
255 static struct cache_head *rsi_alloc(void)
266 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
271 struct rsi rsii, *rsip = NULL;
273 int status = -EINVAL;
277 memset(&rsii, 0, sizeof(rsii));
280 len = qword_get(&mesg, buf, mlen);
283 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
289 len = qword_get(&mesg, buf, mlen);
292 if (rawobj_alloc(&rsii.in_token, buf, len)) {
297 rsip = rsi_lookup(&rsii);
303 expiry = get_expiry(&mesg);
307 len = qword_get(&mesg, buf, mlen);
312 rsii.major_status = simple_strtol(buf, &ep, 10);
317 len = qword_get(&mesg, buf, mlen);
320 rsii.minor_status = simple_strtol(buf, &ep, 10);
325 len = qword_get(&mesg, buf, mlen);
328 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
334 len = qword_get(&mesg, buf, mlen);
337 if (rawobj_alloc(&rsii.out_token, buf, len)) {
342 rsii.h.expiry_time = expiry;
343 rsip = rsi_update(&rsii, rsip);
348 cfs_waitq_broadcast(&rsip->waitq);
349 cache_put(&rsip->h, &rsi_cache);
355 CERROR("rsi parse error %d\n", status);
359 #else /* !HAVE_SUNRPC_CACHE_V2 */
361 static void rsi_put(struct cache_head *item, struct cache_detail *cd)
363 struct rsi *rsi = container_of(item, struct rsi, h);
365 LASSERT(cfs_atomic_read(&item->refcnt) > 0);
367 if (cache_put(item, cd)) {
368 LASSERT(item->next == NULL);
370 kfree(rsi); /* created by cache mgmt using kmalloc */
374 static inline int rsi_match(struct rsi *item, struct rsi *tmp)
376 return __rsi_match(item, tmp);
379 static inline void rsi_init(struct rsi *new, struct rsi *item)
381 __rsi_init(new, item);
384 static inline void rsi_update(struct rsi *new, struct rsi *item)
386 __rsi_update(new, item);
389 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
394 struct rsi rsii, *rsip = NULL;
396 int status = -EINVAL;
400 memset(&rsii, 0, sizeof(rsii));
403 len = qword_get(&mesg, buf, mlen);
406 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
412 len = qword_get(&mesg, buf, mlen);
415 if (rawobj_alloc(&rsii.in_token, buf, len)) {
421 expiry = get_expiry(&mesg);
425 len = qword_get(&mesg, buf, mlen);
430 rsii.major_status = simple_strtol(buf, &ep, 10);
435 len = qword_get(&mesg, buf, mlen);
438 rsii.minor_status = simple_strtol(buf, &ep, 10);
443 len = qword_get(&mesg, buf, mlen);
446 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
452 len = qword_get(&mesg, buf, mlen);
455 if (rawobj_alloc(&rsii.out_token, buf, len)) {
460 rsii.h.expiry_time = expiry;
461 rsip = rsi_lookup(&rsii, 1);
466 cfs_waitq_broadcast(&rsip->waitq);
467 rsi_put(&rsip->h, &rsi_cache);
471 CERROR("rsi parse error %d\n", status);
475 #endif /* HAVE_SUNRPC_CACHE_V2 */
477 static struct cache_detail rsi_cache = {
478 .hash_size = RSI_HASHMAX,
479 .hash_table = rsi_table,
480 .name = "auth.sptlrpc.init",
481 .cache_put = rsi_put,
482 #ifdef HAVE_CACHE_UPCALL
483 .cache_upcall = rsi_upcall,
485 .cache_request = rsi_request,
487 .cache_parse = rsi_parse,
488 #ifdef HAVE_SUNRPC_CACHE_V2
491 .update = update_rsi,
496 #ifdef HAVE_SUNRPC_CACHE_V2
498 static struct rsi *rsi_lookup(struct rsi *item)
500 struct cache_head *ch;
501 int hash = rsi_hash(item);
503 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
505 return container_of(ch, struct rsi, h);
510 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
512 struct cache_head *ch;
513 int hash = rsi_hash(new);
515 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
517 return container_of(ch, struct rsi, h);
524 static DefineSimpleCacheLookup(rsi, 0)
528 /****************************************
530 ****************************************/
532 #define RSC_HASHBITS (10)
533 #define RSC_HASHMAX (1 << RSC_HASHBITS)
534 #define RSC_HASHMASK (RSC_HASHMAX - 1)
538 struct obd_device *target;
540 struct gss_svc_ctx ctx;
543 static struct cache_head *rsc_table[RSC_HASHMAX];
544 static struct cache_detail rsc_cache;
545 #ifdef HAVE_SUNRPC_CACHE_V2
546 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
547 static struct rsc *rsc_lookup(struct rsc *item);
549 static struct rsc *rsc_lookup(struct rsc *item, int set);
552 static void rsc_free(struct rsc *rsci)
554 rawobj_free(&rsci->handle);
555 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
556 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
559 static inline int rsc_hash(struct rsc *rsci)
561 return hash_mem((char *)rsci->handle.data,
562 rsci->handle.len, RSC_HASHBITS);
565 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
567 return rawobj_equal(&new->handle, &tmp->handle);
570 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
572 new->handle = tmp->handle;
573 tmp->handle = RAWOBJ_EMPTY;
576 memset(&new->ctx, 0, sizeof(new->ctx));
577 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
580 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
583 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
584 tmp->ctx.gsc_mechctx = NULL;
586 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
587 cfs_spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
590 #ifdef HAVE_SUNRPC_CACHE_V2
592 static void rsc_put(struct kref *ref)
594 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
596 LASSERT(rsci->h.next == NULL);
601 static int rsc_match(struct cache_head *a, struct cache_head *b)
603 struct rsc *new = container_of(a, struct rsc, h);
604 struct rsc *tmp = container_of(b, struct rsc, h);
606 return __rsc_match(new, tmp);
609 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
611 struct rsc *new = container_of(cnew, struct rsc, h);
612 struct rsc *tmp = container_of(ctmp, struct rsc, h);
614 __rsc_init(new, tmp);
617 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
619 struct rsc *new = container_of(cnew, struct rsc, h);
620 struct rsc *tmp = container_of(ctmp, struct rsc, h);
622 __rsc_update(new, tmp);
625 static struct cache_head * rsc_alloc(void)
636 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
639 int len, rv, tmp_int;
640 struct rsc rsci, *rscp = NULL;
642 int status = -EINVAL;
643 struct gss_api_mech *gm = NULL;
645 memset(&rsci, 0, sizeof(rsci));
648 len = qword_get(&mesg, buf, mlen);
649 if (len < 0) goto out;
651 if (rawobj_alloc(&rsci.handle, buf, len))
656 expiry = get_expiry(&mesg);
662 rv = get_int(&mesg, &tmp_int);
664 CERROR("fail to get remote flag\n");
667 rsci.ctx.gsc_remote = (tmp_int != 0);
670 rv = get_int(&mesg, &tmp_int);
672 CERROR("fail to get oss user flag\n");
675 rsci.ctx.gsc_usr_root = (tmp_int != 0);
678 rv = get_int(&mesg, &tmp_int);
680 CERROR("fail to get mds user flag\n");
683 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
686 rv = get_int(&mesg, &tmp_int);
688 CERROR("fail to get oss user flag\n");
691 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
694 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
696 CERROR("fail to get mapped uid\n");
700 rscp = rsc_lookup(&rsci);
704 /* uid, or NEGATIVE */
705 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
709 CERROR("NOENT? set rsc entry negative\n");
710 cfs_set_bit(CACHE_NEGATIVE, &rsci.h.flags);
713 unsigned long ctx_expiry;
716 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
720 len = qword_get(&mesg, buf, mlen);
723 gm = lgss_name_to_mech(buf);
724 status = -EOPNOTSUPP;
729 /* mech-specific data: */
730 len = qword_get(&mesg, buf, mlen);
735 tmp_buf.data = (unsigned char *)buf;
736 if (lgss_import_sec_context(&tmp_buf, gm,
737 &rsci.ctx.gsc_mechctx))
740 /* currently the expiry time passed down from user-space
741 * is invalid, here we retrive it from mech. */
742 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
743 CERROR("unable to get expire time, drop it\n");
746 expiry = (time_t) ctx_expiry;
749 rsci.h.expiry_time = expiry;
750 rscp = rsc_update(&rsci, rscp);
757 cache_put(&rscp->h, &rsc_cache);
762 CERROR("parse rsc error %d\n", status);
766 #else /* !HAVE_SUNRPC_CACHE_V2 */
768 static void rsc_put(struct cache_head *item, struct cache_detail *cd)
770 struct rsc *rsci = container_of(item, struct rsc, h);
772 LASSERT(cfs_atomic_read(&item->refcnt) > 0);
774 if (cache_put(item, cd)) {
775 LASSERT(item->next == NULL);
777 kfree(rsci); /* created by cache mgmt using kmalloc */
781 static inline int rsc_match(struct rsc *new, struct rsc *tmp)
783 return __rsc_match(new, tmp);
786 static inline void rsc_init(struct rsc *new, struct rsc *tmp)
788 __rsc_init(new, tmp);
791 static inline void rsc_update(struct rsc *new, struct rsc *tmp)
793 __rsc_update(new, tmp);
796 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
799 int len, rv, tmp_int;
800 struct rsc rsci, *rscp = NULL;
802 int status = -EINVAL;
804 memset(&rsci, 0, sizeof(rsci));
807 len = qword_get(&mesg, buf, mlen);
808 if (len < 0) goto out;
810 if (rawobj_alloc(&rsci.handle, buf, len))
815 expiry = get_expiry(&mesg);
821 rv = get_int(&mesg, &tmp_int);
823 CERROR("fail to get remote flag\n");
826 rsci.ctx.gsc_remote = (tmp_int != 0);
829 rv = get_int(&mesg, &tmp_int);
831 CERROR("fail to get oss user flag\n");
834 rsci.ctx.gsc_usr_root = (tmp_int != 0);
837 rv = get_int(&mesg, &tmp_int);
839 CERROR("fail to get mds user flag\n");
842 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
845 rv = get_int(&mesg, &tmp_int);
847 CERROR("fail to get oss user flag\n");
850 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
853 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
855 CERROR("fail to get mapped uid\n");
859 /* uid, or NEGATIVE */
860 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
864 CERROR("NOENT? set rsc entry negative\n");
865 cfs_set_bit(CACHE_NEGATIVE, &rsci.h.flags);
867 struct gss_api_mech *gm;
869 unsigned long ctx_expiry;
872 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
876 len = qword_get(&mesg, buf, mlen);
879 gm = lgss_name_to_mech(buf);
880 status = -EOPNOTSUPP;
885 /* mech-specific data: */
886 len = qword_get(&mesg, buf, mlen);
892 tmp_buf.data = (unsigned char *)buf;
893 if (lgss_import_sec_context(&tmp_buf, gm,
894 &rsci.ctx.gsc_mechctx)) {
899 /* currently the expiry time passed down from user-space
900 * is invalid, here we retrive it from mech. */
901 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
902 CERROR("unable to get expire time, drop it\n");
906 expiry = (time_t) ctx_expiry;
911 rsci.h.expiry_time = expiry;
912 rscp = rsc_lookup(&rsci, 1);
917 rsc_put(&rscp->h, &rsc_cache);
920 CERROR("parse rsc error %d\n", status);
924 #endif /* HAVE_SUNRPC_CACHE_V2 */
927 static struct cache_detail rsc_cache = {
928 .hash_size = RSC_HASHMAX,
929 .hash_table = rsc_table,
930 .name = "auth.sptlrpc.context",
931 .cache_put = rsc_put,
932 .cache_parse = rsc_parse,
933 #ifdef HAVE_SUNRPC_CACHE_V2
936 .update = update_rsc,
941 #ifdef HAVE_SUNRPC_CACHE_V2
943 static struct rsc *rsc_lookup(struct rsc *item)
945 struct cache_head *ch;
946 int hash = rsc_hash(item);
948 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
950 return container_of(ch, struct rsc, h);
955 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
957 struct cache_head *ch;
958 int hash = rsc_hash(new);
960 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
962 return container_of(ch, struct rsc, h);
967 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
971 static DefineSimpleCacheLookup(rsc, 0);
973 #define COMPAT_RSC_PUT(item, cd) rsc_put((item), (cd))
977 /****************************************
979 ****************************************/
981 typedef int rsc_entry_match(struct rsc *rscp, long data);
983 static void rsc_flush(rsc_entry_match *match, long data)
985 struct cache_head **ch;
990 cfs_write_lock(&rsc_cache.hash_lock);
991 for (n = 0; n < RSC_HASHMAX; n++) {
992 for (ch = &rsc_cache.hash_table[n]; *ch;) {
993 rscp = container_of(*ch, struct rsc, h);
995 if (!match(rscp, data)) {
1000 /* it seems simply set NEGATIVE doesn't work */
1002 rscp->h.next = NULL;
1003 cache_get(&rscp->h);
1004 cfs_set_bit(CACHE_NEGATIVE, &rscp->h.flags);
1005 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
1006 rsc_cache.entries--;
1009 cfs_write_unlock(&rsc_cache.hash_lock);
1013 static int match_uid(struct rsc *rscp, long uid)
1015 if ((int) uid == -1)
1017 return ((int) rscp->ctx.gsc_uid == (int) uid);
1020 static int match_target(struct rsc *rscp, long target)
1022 return (rscp->target == (struct obd_device *) target);
1025 static inline void rsc_flush_uid(int uid)
1028 CWARN("flush all gss contexts...\n");
1030 rsc_flush(match_uid, (long) uid);
1033 static inline void rsc_flush_target(struct obd_device *target)
1035 rsc_flush(match_target, (long) target);
1038 void gss_secsvc_flush(struct obd_device *target)
1040 rsc_flush_target(target);
1042 EXPORT_SYMBOL(gss_secsvc_flush);
1044 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
1049 memset(&rsci, 0, sizeof(rsci));
1050 if (rawobj_dup(&rsci.handle, handle))
1053 #ifdef HAVE_SUNRPC_CACHE_V2
1054 found = rsc_lookup(&rsci);
1056 found = rsc_lookup(&rsci, 0);
1061 if (cache_check(&rsc_cache, &found->h, NULL))
1066 #ifdef HAVE_SUNRPC_CACHE_V2
1068 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
1069 struct gss_sec *gsec,
1070 struct gss_cli_ctx *gctx)
1072 struct rsc rsci, *rscp = NULL;
1073 unsigned long ctx_expiry;
1078 memset(&rsci, 0, sizeof(rsci));
1080 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
1081 sizeof(gsec->gs_rvs_hdl)))
1082 GOTO(out, rc = -ENOMEM);
1084 rscp = rsc_lookup(&rsci);
1086 GOTO(out, rc = -ENOMEM);
1088 major = lgss_copy_reverse_context(gctx->gc_mechctx,
1089 &rsci.ctx.gsc_mechctx);
1090 if (major != GSS_S_COMPLETE)
1091 GOTO(out, rc = -ENOMEM);
1093 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
1094 CERROR("unable to get expire time, drop it\n");
1095 GOTO(out, rc = -EINVAL);
1097 rsci.h.expiry_time = (time_t) ctx_expiry;
1099 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
1100 rsci.ctx.gsc_usr_mds = 1;
1101 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
1102 rsci.ctx.gsc_usr_oss = 1;
1104 rsci.ctx.gsc_usr_root = 1;
1106 rscp = rsc_update(&rsci, rscp);
1108 GOTO(out, rc = -ENOMEM);
1110 rscp->target = imp->imp_obd;
1111 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
1113 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
1114 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
1118 cache_put(&rscp->h, &rsc_cache);
1122 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
1123 gsec->gs_rvs_hdl, rc);
1127 #else /* !HAVE_SUNRPC_CACHE_V2 */
1129 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
1130 struct gss_sec *gsec,
1131 struct gss_cli_ctx *gctx)
1133 struct rsc rsci, *rscp;
1134 unsigned long ctx_expiry;
1139 memset(&rsci, 0, sizeof(rsci));
1141 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
1142 sizeof(gsec->gs_rvs_hdl)))
1143 GOTO(out, rc = -ENOMEM);
1145 major = lgss_copy_reverse_context(gctx->gc_mechctx,
1146 &rsci.ctx.gsc_mechctx);
1147 if (major != GSS_S_COMPLETE)
1148 GOTO(out, rc = -ENOMEM);
1150 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
1151 CERROR("unable to get expire time, drop it\n");
1152 GOTO(out, rc = -ENOMEM);
1154 rsci.h.expiry_time = (time_t) ctx_expiry;
1156 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
1157 rsci.ctx.gsc_usr_mds = 1;
1158 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
1159 rsci.ctx.gsc_usr_oss = 1;
1161 rsci.ctx.gsc_usr_root = 1;
1163 rscp = rsc_lookup(&rsci, 1);
1165 CERROR("rsc lookup failed\n");
1166 GOTO(out, rc = -ENOMEM);
1169 rscp->target = imp->imp_obd;
1170 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
1172 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
1173 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
1174 rsc_put(&rscp->h, &rsc_cache);
1179 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
1180 gsec->gs_rvs_hdl, rc);
1184 #endif /* HAVE_SUNRPC_CACHE_V2 */
1186 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
1188 const cfs_time_t expire = 20;
1191 rscp = gss_svc_searchbyctx(handle);
1193 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
1196 rscp->h.expiry_time = cfs_time_current_sec() + expire;
1197 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
1202 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
1204 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
1206 return rawobj_dup(handle, &rscp->handle);
1209 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
1213 rscp = gss_svc_searchbyctx(handle);
1215 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
1216 &rscp->ctx, rscp, seq + 1);
1218 rscp->ctx.gsc_rvs_seq = seq + 1;
1219 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
1224 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
1228 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
1230 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
1231 struct gss_svc_reqctx *grctx,
1232 struct gss_wire_ctx *gw,
1233 struct obd_device *target,
1238 struct ptlrpc_reply_state *rs;
1239 struct rsc *rsci = NULL;
1240 struct rsi *rsip = NULL, rsikey;
1241 cfs_waitlink_t wait;
1242 int replen = sizeof(struct ptlrpc_body);
1243 struct gss_rep_header *rephdr;
1244 int first_check = 1;
1245 int rc = SECSVC_DROP;
1248 memset(&rsikey, 0, sizeof(rsikey));
1249 rsikey.lustre_svc = lustre_svc;
1250 rsikey.nid = (__u64) req->rq_peer.nid;
1252 /* duplicate context handle. for INIT it always 0 */
1253 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
1254 CERROR("fail to dup context handle\n");
1258 if (rawobj_dup(&rsikey.in_token, in_token)) {
1259 CERROR("can't duplicate token\n");
1260 rawobj_free(&rsikey.in_handle);
1264 #ifdef HAVE_SUNRPC_CACHE_V2
1265 rsip = rsi_lookup(&rsikey);
1267 rsip = rsi_lookup(&rsikey, 0);
1271 CERROR("error in rsi_lookup.\n");
1273 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
1274 rc = SECSVC_COMPLETE;
1279 cache_get(&rsip->h); /* take an extra ref */
1280 cfs_waitq_init(&rsip->waitq);
1281 cfs_waitlink_init(&wait);
1282 cfs_waitq_add(&rsip->waitq, &wait);
1285 /* Note each time cache_check() will drop a reference if return
1286 * non-zero. We hold an extra reference on initial rsip, but must
1287 * take care of following calls. */
1288 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
1296 read_lock(&rsi_cache.hash_lock);
1297 valid = cfs_test_bit(CACHE_VALID, &rsip->h.flags);
1299 cfs_set_current_state(CFS_TASK_INTERRUPTIBLE);
1300 read_unlock(&rsi_cache.hash_lock);
1303 cfs_schedule_timeout(GSS_SVC_UPCALL_TIMEOUT *
1306 cache_get(&rsip->h);
1309 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
1313 CWARN("cache_check return ENOENT, drop\n");
1316 /* if not the first check, we have to release the extra
1317 * reference we just added on it. */
1319 cache_put(&rsip->h, &rsi_cache);
1320 CDEBUG(D_SEC, "cache_check is good\n");
1324 cfs_waitq_del(&rsip->waitq, &wait);
1325 cache_put(&rsip->h, &rsi_cache);
1328 GOTO(out, rc = SECSVC_DROP);
1331 rsci = gss_svc_searchbyctx(&rsip->out_handle);
1333 CERROR("authentication failed\n");
1335 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
1336 rc = SECSVC_COMPLETE;
1340 cache_get(&rsci->h);
1341 grctx->src_ctx = &rsci->ctx;
1344 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
1345 CERROR("failed duplicate reverse handle\n");
1349 rsci->target = target;
1351 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
1352 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
1354 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
1355 CERROR("handle size %u too large\n", rsip->out_handle.len);
1356 GOTO(out, rc = SECSVC_DROP);
1359 grctx->src_init = 1;
1360 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
1362 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
1364 CERROR("failed to pack reply: %d\n", rc);
1365 GOTO(out, rc = SECSVC_DROP);
1368 rs = req->rq_reply_state;
1369 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
1370 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
1371 sizeof(*rephdr) + rsip->out_handle.len);
1372 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
1374 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
1375 rephdr->gh_version = PTLRPC_GSS_VERSION;
1376 rephdr->gh_flags = 0;
1377 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
1378 rephdr->gh_major = rsip->major_status;
1379 rephdr->gh_minor = rsip->minor_status;
1380 rephdr->gh_seqwin = GSS_SEQ_WIN;
1381 rephdr->gh_handle.len = rsip->out_handle.len;
1382 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
1383 rsip->out_handle.len);
1385 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
1386 rsip->out_token.len);
1388 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1389 rsip->out_token.len, 0);
1394 /* it looks like here we should put rsip also, but this mess up
1395 * with NFS cache mgmt code... FIXME */
1398 rsi_put(&rsip->h, &rsi_cache);
1402 /* if anything went wrong, we don't keep the context too */
1403 if (rc != SECSVC_OK)
1404 cfs_set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1406 CDEBUG(D_SEC, "create rsc with idx "LPX64"\n",
1407 gss_handle_to_u64(&rsci->handle));
1409 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1414 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1415 struct gss_wire_ctx *gw)
1419 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1421 CWARN("Invalid gss ctx idx "LPX64" from %s\n",
1422 gss_handle_to_u64(&gw->gw_handle),
1423 libcfs_nid2str(req->rq_peer.nid));
1430 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1432 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1434 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1437 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1439 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1441 /* can't be found */
1442 cfs_set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1443 /* to be removed at next scan */
1444 rsc->h.expiry_time = 1;
1447 int __init gss_init_svc_upcall(void)
1451 cfs_spin_lock_init(&__ctx_index_lock);
1453 * this helps reducing context index confliction. after server reboot,
1454 * conflicting request from clients might be filtered out by initial
1455 * sequence number checking, thus no chance to sent error notification
1458 cfs_get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1461 cache_register(&rsi_cache);
1462 cache_register(&rsc_cache);
1464 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1465 * the init upcall channel, otherwise there's big chance that the first
1466 * upcall issued before the channel be opened thus nfsv4 cache code will
1467 * drop the request direclty, thus lead to unnecessary recovery time.
1468 * here we wait at miximum 1.5 seconds. */
1469 for (i = 0; i < 6; i++) {
1470 if (atomic_read(&rsi_cache.readers) > 0)
1472 cfs_set_current_state(TASK_UNINTERRUPTIBLE);
1473 LASSERT(CFS_HZ >= 4);
1474 cfs_schedule_timeout(CFS_HZ / 4);
1477 if (atomic_read(&rsi_cache.readers) == 0)
1478 CWARN("Init channel is not opened by lsvcgssd, following "
1479 "request might be dropped until lsvcgssd is active\n");
1484 void __exit gss_exit_svc_upcall(void)
1486 cache_purge(&rsi_cache);
1487 cache_unregister(&rsi_cache);
1489 cache_purge(&rsc_cache);
1490 cache_unregister(&rsc_cache);