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 static inline void __rsi_init(struct rsi *new, struct rsi *item)
186 new->out_handle = RAWOBJ_EMPTY;
187 new->out_token = RAWOBJ_EMPTY;
189 new->in_handle = item->in_handle;
190 item->in_handle = RAWOBJ_EMPTY;
191 new->in_token = item->in_token;
192 item->in_token = RAWOBJ_EMPTY;
194 new->lustre_svc = item->lustre_svc;
195 new->nid = item->nid;
196 cfs_waitq_init(&new->waitq);
199 static inline void __rsi_update(struct rsi *new, struct rsi *item)
201 LASSERT(new->out_handle.len == 0);
202 LASSERT(new->out_token.len == 0);
204 new->out_handle = item->out_handle;
205 item->out_handle = RAWOBJ_EMPTY;
206 new->out_token = item->out_token;
207 item->out_token = RAWOBJ_EMPTY;
209 new->major_status = item->major_status;
210 new->minor_status = item->minor_status;
213 #ifdef HAVE_SUNRPC_CACHE_V2
215 static void rsi_put(struct kref *ref)
217 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
219 LASSERT(rsi->h.next == NULL);
224 static int rsi_match(struct cache_head *a, struct cache_head *b)
226 struct rsi *item = container_of(a, struct rsi, h);
227 struct rsi *tmp = container_of(b, struct rsi, h);
229 return __rsi_match(item, tmp);
232 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
234 struct rsi *new = container_of(cnew, struct rsi, h);
235 struct rsi *item = container_of(citem, struct rsi, h);
237 __rsi_init(new, item);
240 static void update_rsi(struct cache_head *cnew, struct cache_head *citem)
242 struct rsi *new = container_of(cnew, struct rsi, h);
243 struct rsi *item = container_of(citem, struct rsi, h);
245 __rsi_update(new, item);
248 static struct cache_head *rsi_alloc(void)
259 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
264 struct rsi rsii, *rsip = NULL;
266 int status = -EINVAL;
270 memset(&rsii, 0, sizeof(rsii));
273 len = qword_get(&mesg, buf, mlen);
276 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
282 len = qword_get(&mesg, buf, mlen);
285 if (rawobj_alloc(&rsii.in_token, buf, len)) {
290 rsip = rsi_lookup(&rsii);
296 expiry = get_expiry(&mesg);
300 len = qword_get(&mesg, buf, mlen);
305 rsii.major_status = simple_strtol(buf, &ep, 10);
310 len = qword_get(&mesg, buf, mlen);
313 rsii.minor_status = simple_strtol(buf, &ep, 10);
318 len = qword_get(&mesg, buf, mlen);
321 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
327 len = qword_get(&mesg, buf, mlen);
330 if (rawobj_alloc(&rsii.out_token, buf, len)) {
335 rsii.h.expiry_time = expiry;
336 rsip = rsi_update(&rsii, rsip);
341 cfs_waitq_broadcast(&rsip->waitq);
342 cache_put(&rsip->h, &rsi_cache);
348 CERROR("rsi parse error %d\n", status);
352 #else /* !HAVE_SUNRPC_CACHE_V2 */
354 static void rsi_put(struct cache_head *item, struct cache_detail *cd)
356 struct rsi *rsi = container_of(item, struct rsi, h);
358 LASSERT(cfs_atomic_read(&item->refcnt) > 0);
360 if (cache_put(item, cd)) {
361 LASSERT(item->next == NULL);
363 kfree(rsi); /* created by cache mgmt using kmalloc */
367 static inline int rsi_match(struct rsi *item, struct rsi *tmp)
369 return __rsi_match(item, tmp);
372 static inline void rsi_init(struct rsi *new, struct rsi *item)
374 __rsi_init(new, item);
377 static inline void rsi_update(struct rsi *new, struct rsi *item)
379 __rsi_update(new, item);
382 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
387 struct rsi rsii, *rsip = NULL;
389 int status = -EINVAL;
393 memset(&rsii, 0, sizeof(rsii));
396 len = qword_get(&mesg, buf, mlen);
399 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
405 len = qword_get(&mesg, buf, mlen);
408 if (rawobj_alloc(&rsii.in_token, buf, len)) {
414 expiry = get_expiry(&mesg);
418 len = qword_get(&mesg, buf, mlen);
423 rsii.major_status = simple_strtol(buf, &ep, 10);
428 len = qword_get(&mesg, buf, mlen);
431 rsii.minor_status = simple_strtol(buf, &ep, 10);
436 len = qword_get(&mesg, buf, mlen);
439 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
445 len = qword_get(&mesg, buf, mlen);
448 if (rawobj_alloc(&rsii.out_token, buf, len)) {
453 rsii.h.expiry_time = expiry;
454 rsip = rsi_lookup(&rsii, 1);
459 cfs_waitq_broadcast(&rsip->waitq);
460 rsi_put(&rsip->h, &rsi_cache);
464 CERROR("rsi parse error %d\n", status);
468 #endif /* HAVE_SUNRPC_CACHE_V2 */
470 static struct cache_detail rsi_cache = {
471 .hash_size = RSI_HASHMAX,
472 .hash_table = rsi_table,
473 .name = "auth.sptlrpc.init",
474 .cache_put = rsi_put,
475 .cache_request = rsi_request,
476 .cache_parse = rsi_parse,
477 #ifdef HAVE_SUNRPC_CACHE_V2
480 .update = update_rsi,
485 #ifdef HAVE_SUNRPC_CACHE_V2
487 static struct rsi *rsi_lookup(struct rsi *item)
489 struct cache_head *ch;
490 int hash = rsi_hash(item);
492 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
494 return container_of(ch, struct rsi, h);
499 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
501 struct cache_head *ch;
502 int hash = rsi_hash(new);
504 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
506 return container_of(ch, struct rsi, h);
513 static DefineSimpleCacheLookup(rsi, 0)
517 /****************************************
519 ****************************************/
521 #define RSC_HASHBITS (10)
522 #define RSC_HASHMAX (1 << RSC_HASHBITS)
523 #define RSC_HASHMASK (RSC_HASHMAX - 1)
527 struct obd_device *target;
529 struct gss_svc_ctx ctx;
532 static struct cache_head *rsc_table[RSC_HASHMAX];
533 static struct cache_detail rsc_cache;
534 #ifdef HAVE_SUNRPC_CACHE_V2
535 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
536 static struct rsc *rsc_lookup(struct rsc *item);
538 static struct rsc *rsc_lookup(struct rsc *item, int set);
541 static void rsc_free(struct rsc *rsci)
543 rawobj_free(&rsci->handle);
544 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
545 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
548 static inline int rsc_hash(struct rsc *rsci)
550 return hash_mem((char *)rsci->handle.data,
551 rsci->handle.len, RSC_HASHBITS);
554 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
556 return rawobj_equal(&new->handle, &tmp->handle);
559 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
561 new->handle = tmp->handle;
562 tmp->handle = RAWOBJ_EMPTY;
565 memset(&new->ctx, 0, sizeof(new->ctx));
566 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
569 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
572 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
573 tmp->ctx.gsc_mechctx = NULL;
575 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
576 cfs_spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
579 #ifdef HAVE_SUNRPC_CACHE_V2
581 static void rsc_put(struct kref *ref)
583 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
585 LASSERT(rsci->h.next == NULL);
590 static int rsc_match(struct cache_head *a, struct cache_head *b)
592 struct rsc *new = container_of(a, struct rsc, h);
593 struct rsc *tmp = container_of(b, struct rsc, h);
595 return __rsc_match(new, tmp);
598 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
600 struct rsc *new = container_of(cnew, struct rsc, h);
601 struct rsc *tmp = container_of(ctmp, struct rsc, h);
603 __rsc_init(new, tmp);
606 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
608 struct rsc *new = container_of(cnew, struct rsc, h);
609 struct rsc *tmp = container_of(ctmp, struct rsc, h);
611 __rsc_update(new, tmp);
614 static struct cache_head * rsc_alloc(void)
625 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
628 int len, rv, tmp_int;
629 struct rsc rsci, *rscp = NULL;
631 int status = -EINVAL;
632 struct gss_api_mech *gm = NULL;
634 memset(&rsci, 0, sizeof(rsci));
637 len = qword_get(&mesg, buf, mlen);
638 if (len < 0) goto out;
640 if (rawobj_alloc(&rsci.handle, buf, len))
645 expiry = get_expiry(&mesg);
651 rv = get_int(&mesg, &tmp_int);
653 CERROR("fail to get remote flag\n");
656 rsci.ctx.gsc_remote = (tmp_int != 0);
659 rv = get_int(&mesg, &tmp_int);
661 CERROR("fail to get oss user flag\n");
664 rsci.ctx.gsc_usr_root = (tmp_int != 0);
667 rv = get_int(&mesg, &tmp_int);
669 CERROR("fail to get mds user flag\n");
672 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
675 rv = get_int(&mesg, &tmp_int);
677 CERROR("fail to get oss user flag\n");
680 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
683 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
685 CERROR("fail to get mapped uid\n");
689 rscp = rsc_lookup(&rsci);
693 /* uid, or NEGATIVE */
694 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
698 CERROR("NOENT? set rsc entry negative\n");
699 cfs_set_bit(CACHE_NEGATIVE, &rsci.h.flags);
702 unsigned long ctx_expiry;
705 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
709 len = qword_get(&mesg, buf, mlen);
712 gm = lgss_name_to_mech(buf);
713 status = -EOPNOTSUPP;
718 /* mech-specific data: */
719 len = qword_get(&mesg, buf, mlen);
724 tmp_buf.data = (unsigned char *)buf;
725 if (lgss_import_sec_context(&tmp_buf, gm,
726 &rsci.ctx.gsc_mechctx))
729 /* currently the expiry time passed down from user-space
730 * is invalid, here we retrive it from mech. */
731 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
732 CERROR("unable to get expire time, drop it\n");
735 expiry = (time_t) ctx_expiry;
738 rsci.h.expiry_time = expiry;
739 rscp = rsc_update(&rsci, rscp);
746 cache_put(&rscp->h, &rsc_cache);
751 CERROR("parse rsc error %d\n", status);
755 #else /* !HAVE_SUNRPC_CACHE_V2 */
757 static void rsc_put(struct cache_head *item, struct cache_detail *cd)
759 struct rsc *rsci = container_of(item, struct rsc, h);
761 LASSERT(cfs_atomic_read(&item->refcnt) > 0);
763 if (cache_put(item, cd)) {
764 LASSERT(item->next == NULL);
766 kfree(rsci); /* created by cache mgmt using kmalloc */
770 static inline int rsc_match(struct rsc *new, struct rsc *tmp)
772 return __rsc_match(new, tmp);
775 static inline void rsc_init(struct rsc *new, struct rsc *tmp)
777 __rsc_init(new, tmp);
780 static inline void rsc_update(struct rsc *new, struct rsc *tmp)
782 __rsc_update(new, tmp);
785 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
788 int len, rv, tmp_int;
789 struct rsc rsci, *rscp = NULL;
791 int status = -EINVAL;
793 memset(&rsci, 0, sizeof(rsci));
796 len = qword_get(&mesg, buf, mlen);
797 if (len < 0) goto out;
799 if (rawobj_alloc(&rsci.handle, buf, len))
804 expiry = get_expiry(&mesg);
810 rv = get_int(&mesg, &tmp_int);
812 CERROR("fail to get remote flag\n");
815 rsci.ctx.gsc_remote = (tmp_int != 0);
818 rv = get_int(&mesg, &tmp_int);
820 CERROR("fail to get oss user flag\n");
823 rsci.ctx.gsc_usr_root = (tmp_int != 0);
826 rv = get_int(&mesg, &tmp_int);
828 CERROR("fail to get mds user flag\n");
831 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
834 rv = get_int(&mesg, &tmp_int);
836 CERROR("fail to get oss user flag\n");
839 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
842 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
844 CERROR("fail to get mapped uid\n");
848 /* uid, or NEGATIVE */
849 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
853 CERROR("NOENT? set rsc entry negative\n");
854 cfs_set_bit(CACHE_NEGATIVE, &rsci.h.flags);
856 struct gss_api_mech *gm;
858 unsigned long ctx_expiry;
861 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
865 len = qword_get(&mesg, buf, mlen);
868 gm = lgss_name_to_mech(buf);
869 status = -EOPNOTSUPP;
874 /* mech-specific data: */
875 len = qword_get(&mesg, buf, mlen);
881 tmp_buf.data = (unsigned char *)buf;
882 if (lgss_import_sec_context(&tmp_buf, gm,
883 &rsci.ctx.gsc_mechctx)) {
888 /* currently the expiry time passed down from user-space
889 * is invalid, here we retrive it from mech. */
890 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
891 CERROR("unable to get expire time, drop it\n");
895 expiry = (time_t) ctx_expiry;
900 rsci.h.expiry_time = expiry;
901 rscp = rsc_lookup(&rsci, 1);
906 rsc_put(&rscp->h, &rsc_cache);
909 CERROR("parse rsc error %d\n", status);
913 #endif /* HAVE_SUNRPC_CACHE_V2 */
916 static struct cache_detail rsc_cache = {
917 .hash_size = RSC_HASHMAX,
918 .hash_table = rsc_table,
919 .name = "auth.sptlrpc.context",
920 .cache_put = rsc_put,
921 .cache_parse = rsc_parse,
922 #ifdef HAVE_SUNRPC_CACHE_V2
925 .update = update_rsc,
930 #ifdef HAVE_SUNRPC_CACHE_V2
932 static struct rsc *rsc_lookup(struct rsc *item)
934 struct cache_head *ch;
935 int hash = rsc_hash(item);
937 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
939 return container_of(ch, struct rsc, h);
944 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
946 struct cache_head *ch;
947 int hash = rsc_hash(new);
949 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
951 return container_of(ch, struct rsc, h);
956 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
960 static DefineSimpleCacheLookup(rsc, 0);
962 #define COMPAT_RSC_PUT(item, cd) rsc_put((item), (cd))
966 /****************************************
968 ****************************************/
970 typedef int rsc_entry_match(struct rsc *rscp, long data);
972 static void rsc_flush(rsc_entry_match *match, long data)
974 struct cache_head **ch;
979 cfs_write_lock(&rsc_cache.hash_lock);
980 for (n = 0; n < RSC_HASHMAX; n++) {
981 for (ch = &rsc_cache.hash_table[n]; *ch;) {
982 rscp = container_of(*ch, struct rsc, h);
984 if (!match(rscp, data)) {
989 /* it seems simply set NEGATIVE doesn't work */
993 cfs_set_bit(CACHE_NEGATIVE, &rscp->h.flags);
994 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
998 cfs_write_unlock(&rsc_cache.hash_lock);
1002 static int match_uid(struct rsc *rscp, long uid)
1004 if ((int) uid == -1)
1006 return ((int) rscp->ctx.gsc_uid == (int) uid);
1009 static int match_target(struct rsc *rscp, long target)
1011 return (rscp->target == (struct obd_device *) target);
1014 static inline void rsc_flush_uid(int uid)
1017 CWARN("flush all gss contexts...\n");
1019 rsc_flush(match_uid, (long) uid);
1022 static inline void rsc_flush_target(struct obd_device *target)
1024 rsc_flush(match_target, (long) target);
1027 void gss_secsvc_flush(struct obd_device *target)
1029 rsc_flush_target(target);
1031 EXPORT_SYMBOL(gss_secsvc_flush);
1033 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
1038 memset(&rsci, 0, sizeof(rsci));
1039 if (rawobj_dup(&rsci.handle, handle))
1042 #ifdef HAVE_SUNRPC_CACHE_V2
1043 found = rsc_lookup(&rsci);
1045 found = rsc_lookup(&rsci, 0);
1050 if (cache_check(&rsc_cache, &found->h, NULL))
1055 #ifdef HAVE_SUNRPC_CACHE_V2
1057 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
1058 struct gss_sec *gsec,
1059 struct gss_cli_ctx *gctx)
1061 struct rsc rsci, *rscp = NULL;
1062 unsigned long ctx_expiry;
1067 memset(&rsci, 0, sizeof(rsci));
1069 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
1070 sizeof(gsec->gs_rvs_hdl)))
1071 GOTO(out, rc = -ENOMEM);
1073 rscp = rsc_lookup(&rsci);
1075 GOTO(out, rc = -ENOMEM);
1077 major = lgss_copy_reverse_context(gctx->gc_mechctx,
1078 &rsci.ctx.gsc_mechctx);
1079 if (major != GSS_S_COMPLETE)
1080 GOTO(out, rc = -ENOMEM);
1082 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
1083 CERROR("unable to get expire time, drop it\n");
1084 GOTO(out, rc = -EINVAL);
1086 rsci.h.expiry_time = (time_t) ctx_expiry;
1088 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
1089 rsci.ctx.gsc_usr_mds = 1;
1090 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
1091 rsci.ctx.gsc_usr_oss = 1;
1093 rsci.ctx.gsc_usr_root = 1;
1095 rscp = rsc_update(&rsci, rscp);
1097 GOTO(out, rc = -ENOMEM);
1099 rscp->target = imp->imp_obd;
1100 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
1102 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
1103 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
1107 cache_put(&rscp->h, &rsc_cache);
1111 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
1112 gsec->gs_rvs_hdl, rc);
1116 #else /* !HAVE_SUNRPC_CACHE_V2 */
1118 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
1119 struct gss_sec *gsec,
1120 struct gss_cli_ctx *gctx)
1122 struct rsc rsci, *rscp;
1123 unsigned long ctx_expiry;
1128 memset(&rsci, 0, sizeof(rsci));
1130 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
1131 sizeof(gsec->gs_rvs_hdl)))
1132 GOTO(out, rc = -ENOMEM);
1134 major = lgss_copy_reverse_context(gctx->gc_mechctx,
1135 &rsci.ctx.gsc_mechctx);
1136 if (major != GSS_S_COMPLETE)
1137 GOTO(out, rc = -ENOMEM);
1139 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
1140 CERROR("unable to get expire time, drop it\n");
1141 GOTO(out, rc = -ENOMEM);
1143 rsci.h.expiry_time = (time_t) ctx_expiry;
1145 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
1146 rsci.ctx.gsc_usr_mds = 1;
1147 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
1148 rsci.ctx.gsc_usr_oss = 1;
1150 rsci.ctx.gsc_usr_root = 1;
1152 rscp = rsc_lookup(&rsci, 1);
1154 CERROR("rsc lookup failed\n");
1155 GOTO(out, rc = -ENOMEM);
1158 rscp->target = imp->imp_obd;
1159 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
1161 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
1162 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
1163 rsc_put(&rscp->h, &rsc_cache);
1168 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
1169 gsec->gs_rvs_hdl, rc);
1173 #endif /* HAVE_SUNRPC_CACHE_V2 */
1175 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
1177 const cfs_time_t expire = 20;
1180 rscp = gss_svc_searchbyctx(handle);
1182 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
1185 rscp->h.expiry_time = cfs_time_current_sec() + expire;
1186 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
1191 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
1193 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
1195 return rawobj_dup(handle, &rscp->handle);
1198 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
1202 rscp = gss_svc_searchbyctx(handle);
1204 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
1205 &rscp->ctx, rscp, seq + 1);
1207 rscp->ctx.gsc_rvs_seq = seq + 1;
1208 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
1213 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
1217 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
1219 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
1220 struct gss_svc_reqctx *grctx,
1221 struct gss_wire_ctx *gw,
1222 struct obd_device *target,
1227 struct ptlrpc_reply_state *rs;
1228 struct rsc *rsci = NULL;
1229 struct rsi *rsip = NULL, rsikey;
1230 cfs_waitlink_t wait;
1231 int replen = sizeof(struct ptlrpc_body);
1232 struct gss_rep_header *rephdr;
1233 int first_check = 1;
1234 int rc = SECSVC_DROP;
1237 memset(&rsikey, 0, sizeof(rsikey));
1238 rsikey.lustre_svc = lustre_svc;
1239 rsikey.nid = (__u64) req->rq_peer.nid;
1241 /* duplicate context handle. for INIT it always 0 */
1242 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
1243 CERROR("fail to dup context handle\n");
1247 if (rawobj_dup(&rsikey.in_token, in_token)) {
1248 CERROR("can't duplicate token\n");
1249 rawobj_free(&rsikey.in_handle);
1253 #ifdef HAVE_SUNRPC_CACHE_V2
1254 rsip = rsi_lookup(&rsikey);
1256 rsip = rsi_lookup(&rsikey, 0);
1260 CERROR("error in rsi_lookup.\n");
1262 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
1263 rc = SECSVC_COMPLETE;
1268 cache_get(&rsip->h); /* take an extra ref */
1269 cfs_waitq_init(&rsip->waitq);
1270 cfs_waitlink_init(&wait);
1271 cfs_waitq_add(&rsip->waitq, &wait);
1274 /* Note each time cache_check() will drop a reference if return
1275 * non-zero. We hold an extra reference on initial rsip, but must
1276 * take care of following calls. */
1277 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
1285 read_lock(&rsi_cache.hash_lock);
1286 valid = cfs_test_bit(CACHE_VALID, &rsip->h.flags);
1288 cfs_set_current_state(CFS_TASK_INTERRUPTIBLE);
1289 read_unlock(&rsi_cache.hash_lock);
1292 cfs_schedule_timeout(GSS_SVC_UPCALL_TIMEOUT *
1295 cache_get(&rsip->h);
1298 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
1302 CWARN("cache_check return ENOENT, drop\n");
1305 /* if not the first check, we have to release the extra
1306 * reference we just added on it. */
1308 cache_put(&rsip->h, &rsi_cache);
1309 CDEBUG(D_SEC, "cache_check is good\n");
1313 cfs_waitq_del(&rsip->waitq, &wait);
1314 cache_put(&rsip->h, &rsi_cache);
1317 GOTO(out, rc = SECSVC_DROP);
1320 rsci = gss_svc_searchbyctx(&rsip->out_handle);
1322 CERROR("authentication failed\n");
1324 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
1325 rc = SECSVC_COMPLETE;
1329 cache_get(&rsci->h);
1330 grctx->src_ctx = &rsci->ctx;
1333 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
1334 CERROR("failed duplicate reverse handle\n");
1338 rsci->target = target;
1340 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
1341 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
1343 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
1344 CERROR("handle size %u too large\n", rsip->out_handle.len);
1345 GOTO(out, rc = SECSVC_DROP);
1348 grctx->src_init = 1;
1349 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
1351 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
1353 CERROR("failed to pack reply: %d\n", rc);
1354 GOTO(out, rc = SECSVC_DROP);
1357 rs = req->rq_reply_state;
1358 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
1359 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
1360 sizeof(*rephdr) + rsip->out_handle.len);
1361 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
1363 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
1364 rephdr->gh_version = PTLRPC_GSS_VERSION;
1365 rephdr->gh_flags = 0;
1366 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
1367 rephdr->gh_major = rsip->major_status;
1368 rephdr->gh_minor = rsip->minor_status;
1369 rephdr->gh_seqwin = GSS_SEQ_WIN;
1370 rephdr->gh_handle.len = rsip->out_handle.len;
1371 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
1372 rsip->out_handle.len);
1374 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
1375 rsip->out_token.len);
1377 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1378 rsip->out_token.len, 0);
1383 /* it looks like here we should put rsip also, but this mess up
1384 * with NFS cache mgmt code... FIXME */
1387 rsi_put(&rsip->h, &rsi_cache);
1391 /* if anything went wrong, we don't keep the context too */
1392 if (rc != SECSVC_OK)
1393 cfs_set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1395 CDEBUG(D_SEC, "create rsc with idx "LPX64"\n",
1396 gss_handle_to_u64(&rsci->handle));
1398 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1403 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1404 struct gss_wire_ctx *gw)
1408 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1410 CWARN("Invalid gss ctx idx "LPX64" from %s\n",
1411 gss_handle_to_u64(&gw->gw_handle),
1412 libcfs_nid2str(req->rq_peer.nid));
1419 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1421 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1423 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1426 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1428 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1430 /* can't be found */
1431 cfs_set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1432 /* to be removed at next scan */
1433 rsc->h.expiry_time = 1;
1436 int __init gss_init_svc_upcall(void)
1440 cfs_spin_lock_init(&__ctx_index_lock);
1442 * this helps reducing context index confliction. after server reboot,
1443 * conflicting request from clients might be filtered out by initial
1444 * sequence number checking, thus no chance to sent error notification
1447 cfs_get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1450 cache_register(&rsi_cache);
1451 cache_register(&rsc_cache);
1453 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1454 * the init upcall channel, otherwise there's big chance that the first
1455 * upcall issued before the channel be opened thus nfsv4 cache code will
1456 * drop the request direclty, thus lead to unnecessary recovery time.
1457 * here we wait at miximum 1.5 seconds. */
1458 for (i = 0; i < 6; i++) {
1459 if (atomic_read(&rsi_cache.readers) > 0)
1461 cfs_set_current_state(TASK_UNINTERRUPTIBLE);
1462 LASSERT(CFS_HZ >= 4);
1463 cfs_schedule_timeout(CFS_HZ / 4);
1466 if (atomic_read(&rsi_cache.readers) == 0)
1467 CWARN("Init channel is not opened by lsvcgssd, following "
1468 "request might be dropped until lsvcgssd is active\n");
1473 void __exit gss_exit_svc_upcall(void)
1475 cache_purge(&rsi_cache);
1476 cache_unregister(&rsi_cache);
1478 cache_purge(&rsc_cache);
1479 cache_unregister(&rsc_cache);