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 = 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 static struct rsi *rsi_update(struct rsi *new, struct rsi *old);
136 static struct rsi *rsi_lookup(struct rsi *item);
138 static inline int rsi_hash(struct rsi *item)
140 return hash_mem((char *)item->in_handle.data, item->in_handle.len,
142 hash_mem((char *)item->in_token.data, item->in_token.len,
146 static inline int __rsi_match(struct rsi *item, struct rsi *tmp)
148 return (rawobj_equal(&item->in_handle, &tmp->in_handle) &&
149 rawobj_equal(&item->in_token, &tmp->in_token));
152 static void rsi_free(struct rsi *rsi)
154 rawobj_free(&rsi->in_handle);
155 rawobj_free(&rsi->in_token);
156 rawobj_free(&rsi->out_handle);
157 rawobj_free(&rsi->out_token);
160 static void rsi_request(struct cache_detail *cd,
161 struct cache_head *h,
162 char **bpp, int *blen)
164 struct rsi *rsi = container_of(h, struct rsi, h);
167 /* if in_handle is null, provide kernel suggestion */
168 if (rsi->in_handle.len == 0)
169 index = gss_get_next_ctx_index();
171 qword_addhex(bpp, blen, (char *) &rsi->lustre_svc,
172 sizeof(rsi->lustre_svc));
173 qword_addhex(bpp, blen, (char *) &rsi->nid, sizeof(rsi->nid));
174 qword_addhex(bpp, blen, (char *) &index, sizeof(index));
175 qword_addhex(bpp, blen, rsi->in_handle.data, rsi->in_handle.len);
176 qword_addhex(bpp, blen, rsi->in_token.data, rsi->in_token.len);
180 static int rsi_upcall(struct cache_detail *cd, struct cache_head *h)
182 return sunrpc_cache_pipe_upcall(cd, h, rsi_request);
185 static inline void __rsi_init(struct rsi *new, struct rsi *item)
187 new->out_handle = RAWOBJ_EMPTY;
188 new->out_token = RAWOBJ_EMPTY;
190 new->in_handle = item->in_handle;
191 item->in_handle = RAWOBJ_EMPTY;
192 new->in_token = item->in_token;
193 item->in_token = RAWOBJ_EMPTY;
195 new->lustre_svc = item->lustre_svc;
196 new->nid = item->nid;
197 cfs_waitq_init(&new->waitq);
200 static inline void __rsi_update(struct rsi *new, struct rsi *item)
202 LASSERT(new->out_handle.len == 0);
203 LASSERT(new->out_token.len == 0);
205 new->out_handle = item->out_handle;
206 item->out_handle = RAWOBJ_EMPTY;
207 new->out_token = item->out_token;
208 item->out_token = RAWOBJ_EMPTY;
210 new->major_status = item->major_status;
211 new->minor_status = item->minor_status;
214 static void rsi_put(struct kref *ref)
216 struct rsi *rsi = container_of(ref, struct rsi, h.ref);
218 LASSERT(rsi->h.next == NULL);
223 static int rsi_match(struct cache_head *a, struct cache_head *b)
225 struct rsi *item = container_of(a, struct rsi, h);
226 struct rsi *tmp = container_of(b, struct rsi, h);
228 return __rsi_match(item, tmp);
231 static void rsi_init(struct cache_head *cnew, struct cache_head *citem)
233 struct rsi *new = container_of(cnew, struct rsi, h);
234 struct rsi *item = container_of(citem, struct rsi, h);
236 __rsi_init(new, item);
239 static void update_rsi(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_update(new, item);
247 static struct cache_head *rsi_alloc(void)
258 static int rsi_parse(struct cache_detail *cd, char *mesg, int mlen)
263 struct rsi rsii, *rsip = NULL;
265 int status = -EINVAL;
269 memset(&rsii, 0, sizeof(rsii));
272 len = qword_get(&mesg, buf, mlen);
275 if (rawobj_alloc(&rsii.in_handle, buf, len)) {
281 len = qword_get(&mesg, buf, mlen);
284 if (rawobj_alloc(&rsii.in_token, buf, len)) {
289 rsip = rsi_lookup(&rsii);
295 expiry = get_expiry(&mesg);
299 len = qword_get(&mesg, buf, mlen);
304 rsii.major_status = simple_strtol(buf, &ep, 10);
309 len = qword_get(&mesg, buf, mlen);
312 rsii.minor_status = simple_strtol(buf, &ep, 10);
317 len = qword_get(&mesg, buf, mlen);
320 if (rawobj_alloc(&rsii.out_handle, buf, len)) {
326 len = qword_get(&mesg, buf, mlen);
329 if (rawobj_alloc(&rsii.out_token, buf, len)) {
334 rsii.h.expiry_time = expiry;
335 rsip = rsi_update(&rsii, rsip);
340 cfs_waitq_broadcast(&rsip->waitq);
341 cache_put(&rsip->h, &rsi_cache);
347 CERROR("rsi parse error %d\n", status);
351 static struct cache_detail rsi_cache = {
352 .hash_size = RSI_HASHMAX,
353 .hash_table = rsi_table,
354 .name = "auth.sptlrpc.init",
355 .cache_put = rsi_put,
356 .cache_upcall = rsi_upcall,
357 .cache_parse = rsi_parse,
360 .update = update_rsi,
364 static struct rsi *rsi_lookup(struct rsi *item)
366 struct cache_head *ch;
367 int hash = rsi_hash(item);
369 ch = sunrpc_cache_lookup(&rsi_cache, &item->h, hash);
371 return container_of(ch, struct rsi, h);
376 static struct rsi *rsi_update(struct rsi *new, struct rsi *old)
378 struct cache_head *ch;
379 int hash = rsi_hash(new);
381 ch = sunrpc_cache_update(&rsi_cache, &new->h, &old->h, hash);
383 return container_of(ch, struct rsi, h);
388 /****************************************
390 ****************************************/
392 #define RSC_HASHBITS (10)
393 #define RSC_HASHMAX (1 << RSC_HASHBITS)
394 #define RSC_HASHMASK (RSC_HASHMAX - 1)
398 struct obd_device *target;
400 struct gss_svc_ctx ctx;
403 static struct cache_head *rsc_table[RSC_HASHMAX];
404 static struct cache_detail rsc_cache;
405 static struct rsc *rsc_update(struct rsc *new, struct rsc *old);
406 static struct rsc *rsc_lookup(struct rsc *item);
408 static void rsc_free(struct rsc *rsci)
410 rawobj_free(&rsci->handle);
411 rawobj_free(&rsci->ctx.gsc_rvs_hdl);
412 lgss_delete_sec_context(&rsci->ctx.gsc_mechctx);
415 static inline int rsc_hash(struct rsc *rsci)
417 return hash_mem((char *)rsci->handle.data,
418 rsci->handle.len, RSC_HASHBITS);
421 static inline int __rsc_match(struct rsc *new, struct rsc *tmp)
423 return rawobj_equal(&new->handle, &tmp->handle);
426 static inline void __rsc_init(struct rsc *new, struct rsc *tmp)
428 new->handle = tmp->handle;
429 tmp->handle = RAWOBJ_EMPTY;
432 memset(&new->ctx, 0, sizeof(new->ctx));
433 new->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
436 static inline void __rsc_update(struct rsc *new, struct rsc *tmp)
439 tmp->ctx.gsc_rvs_hdl = RAWOBJ_EMPTY;
440 tmp->ctx.gsc_mechctx = NULL;
442 memset(&new->ctx.gsc_seqdata, 0, sizeof(new->ctx.gsc_seqdata));
443 spin_lock_init(&new->ctx.gsc_seqdata.ssd_lock);
446 static void rsc_put(struct kref *ref)
448 struct rsc *rsci = container_of(ref, struct rsc, h.ref);
450 LASSERT(rsci->h.next == NULL);
455 static int rsc_match(struct cache_head *a, struct cache_head *b)
457 struct rsc *new = container_of(a, struct rsc, h);
458 struct rsc *tmp = container_of(b, struct rsc, h);
460 return __rsc_match(new, tmp);
463 static void rsc_init(struct cache_head *cnew, struct cache_head *ctmp)
465 struct rsc *new = container_of(cnew, struct rsc, h);
466 struct rsc *tmp = container_of(ctmp, struct rsc, h);
468 __rsc_init(new, tmp);
471 static void update_rsc(struct cache_head *cnew, struct cache_head *ctmp)
473 struct rsc *new = container_of(cnew, struct rsc, h);
474 struct rsc *tmp = container_of(ctmp, struct rsc, h);
476 __rsc_update(new, tmp);
479 static struct cache_head * rsc_alloc(void)
490 static int rsc_parse(struct cache_detail *cd, char *mesg, int mlen)
493 int len, rv, tmp_int;
494 struct rsc rsci, *rscp = NULL;
496 int status = -EINVAL;
497 struct gss_api_mech *gm = NULL;
499 memset(&rsci, 0, sizeof(rsci));
502 len = qword_get(&mesg, buf, mlen);
503 if (len < 0) goto out;
505 if (rawobj_alloc(&rsci.handle, buf, len))
510 expiry = get_expiry(&mesg);
516 rv = get_int(&mesg, &tmp_int);
518 CERROR("fail to get remote flag\n");
521 rsci.ctx.gsc_remote = (tmp_int != 0);
524 rv = get_int(&mesg, &tmp_int);
526 CERROR("fail to get oss user flag\n");
529 rsci.ctx.gsc_usr_root = (tmp_int != 0);
532 rv = get_int(&mesg, &tmp_int);
534 CERROR("fail to get mds user flag\n");
537 rsci.ctx.gsc_usr_mds = (tmp_int != 0);
540 rv = get_int(&mesg, &tmp_int);
542 CERROR("fail to get oss user flag\n");
545 rsci.ctx.gsc_usr_oss = (tmp_int != 0);
548 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_mapped_uid);
550 CERROR("fail to get mapped uid\n");
554 rscp = rsc_lookup(&rsci);
558 /* uid, or NEGATIVE */
559 rv = get_int(&mesg, (int *) &rsci.ctx.gsc_uid);
563 CERROR("NOENT? set rsc entry negative\n");
564 set_bit(CACHE_NEGATIVE, &rsci.h.flags);
567 unsigned long ctx_expiry;
570 if (get_int(&mesg, (int *) &rsci.ctx.gsc_gid))
574 len = qword_get(&mesg, buf, mlen);
577 gm = lgss_name_to_mech(buf);
578 status = -EOPNOTSUPP;
583 /* mech-specific data: */
584 len = qword_get(&mesg, buf, mlen);
589 tmp_buf.data = (unsigned char *)buf;
590 if (lgss_import_sec_context(&tmp_buf, gm,
591 &rsci.ctx.gsc_mechctx))
594 /* currently the expiry time passed down from user-space
595 * is invalid, here we retrive it from mech. */
596 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
597 CERROR("unable to get expire time, drop it\n");
600 expiry = (time_t) ctx_expiry;
603 rsci.h.expiry_time = expiry;
604 rscp = rsc_update(&rsci, rscp);
611 cache_put(&rscp->h, &rsc_cache);
616 CERROR("parse rsc error %d\n", status);
620 static struct cache_detail rsc_cache = {
621 .hash_size = RSC_HASHMAX,
622 .hash_table = rsc_table,
623 .name = "auth.sptlrpc.context",
624 .cache_put = rsc_put,
625 .cache_parse = rsc_parse,
628 .update = update_rsc,
632 static struct rsc *rsc_lookup(struct rsc *item)
634 struct cache_head *ch;
635 int hash = rsc_hash(item);
637 ch = sunrpc_cache_lookup(&rsc_cache, &item->h, hash);
639 return container_of(ch, struct rsc, h);
644 static struct rsc *rsc_update(struct rsc *new, struct rsc *old)
646 struct cache_head *ch;
647 int hash = rsc_hash(new);
649 ch = sunrpc_cache_update(&rsc_cache, &new->h, &old->h, hash);
651 return container_of(ch, struct rsc, h);
656 #define COMPAT_RSC_PUT(item, cd) cache_put((item), (cd))
658 /****************************************
660 ****************************************/
662 typedef int rsc_entry_match(struct rsc *rscp, long data);
664 static void rsc_flush(rsc_entry_match *match, long data)
666 struct cache_head **ch;
671 write_lock(&rsc_cache.hash_lock);
672 for (n = 0; n < RSC_HASHMAX; n++) {
673 for (ch = &rsc_cache.hash_table[n]; *ch;) {
674 rscp = container_of(*ch, struct rsc, h);
676 if (!match(rscp, data)) {
681 /* it seems simply set NEGATIVE doesn't work */
685 set_bit(CACHE_NEGATIVE, &rscp->h.flags);
686 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
690 write_unlock(&rsc_cache.hash_lock);
694 static int match_uid(struct rsc *rscp, long uid)
698 return ((int) rscp->ctx.gsc_uid == (int) uid);
701 static int match_target(struct rsc *rscp, long target)
703 return (rscp->target == (struct obd_device *) target);
706 static inline void rsc_flush_uid(int uid)
709 CWARN("flush all gss contexts...\n");
711 rsc_flush(match_uid, (long) uid);
714 static inline void rsc_flush_target(struct obd_device *target)
716 rsc_flush(match_target, (long) target);
719 void gss_secsvc_flush(struct obd_device *target)
721 rsc_flush_target(target);
723 EXPORT_SYMBOL(gss_secsvc_flush);
725 static struct rsc *gss_svc_searchbyctx(rawobj_t *handle)
730 memset(&rsci, 0, sizeof(rsci));
731 if (rawobj_dup(&rsci.handle, handle))
734 found = rsc_lookup(&rsci);
738 if (cache_check(&rsc_cache, &found->h, NULL))
743 int gss_svc_upcall_install_rvs_ctx(struct obd_import *imp,
744 struct gss_sec *gsec,
745 struct gss_cli_ctx *gctx)
747 struct rsc rsci, *rscp = NULL;
748 unsigned long ctx_expiry;
753 memset(&rsci, 0, sizeof(rsci));
755 if (rawobj_alloc(&rsci.handle, (char *) &gsec->gs_rvs_hdl,
756 sizeof(gsec->gs_rvs_hdl)))
757 GOTO(out, rc = -ENOMEM);
759 rscp = rsc_lookup(&rsci);
761 GOTO(out, rc = -ENOMEM);
763 major = lgss_copy_reverse_context(gctx->gc_mechctx,
764 &rsci.ctx.gsc_mechctx);
765 if (major != GSS_S_COMPLETE)
766 GOTO(out, rc = -ENOMEM);
768 if (lgss_inquire_context(rsci.ctx.gsc_mechctx, &ctx_expiry)) {
769 CERROR("unable to get expire time, drop it\n");
770 GOTO(out, rc = -EINVAL);
772 rsci.h.expiry_time = (time_t) ctx_expiry;
774 if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0)
775 rsci.ctx.gsc_usr_mds = 1;
776 else if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0)
777 rsci.ctx.gsc_usr_oss = 1;
779 rsci.ctx.gsc_usr_root = 1;
781 rscp = rsc_update(&rsci, rscp);
783 GOTO(out, rc = -ENOMEM);
785 rscp->target = imp->imp_obd;
786 rawobj_dup(&gctx->gc_svc_handle, &rscp->handle);
788 CWARN("create reverse svc ctx %p to %s: idx "LPX64"\n",
789 &rscp->ctx, obd2cli_tgt(imp->imp_obd), gsec->gs_rvs_hdl);
793 cache_put(&rscp->h, &rsc_cache);
797 CERROR("create reverse svc ctx: idx "LPX64", rc %d\n",
798 gsec->gs_rvs_hdl, rc);
802 int gss_svc_upcall_expire_rvs_ctx(rawobj_t *handle)
804 const cfs_time_t expire = 20;
807 rscp = gss_svc_searchbyctx(handle);
809 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) expire soon\n",
812 rscp->h.expiry_time = cfs_time_current_sec() + expire;
813 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
818 int gss_svc_upcall_dup_handle(rawobj_t *handle, struct gss_svc_ctx *ctx)
820 struct rsc *rscp = container_of(ctx, struct rsc, ctx);
822 return rawobj_dup(handle, &rscp->handle);
825 int gss_svc_upcall_update_sequence(rawobj_t *handle, __u32 seq)
829 rscp = gss_svc_searchbyctx(handle);
831 CDEBUG(D_SEC, "reverse svcctx %p (rsc %p) update seq to %u\n",
832 &rscp->ctx, rscp, seq + 1);
834 rscp->ctx.gsc_rvs_seq = seq + 1;
835 COMPAT_RSC_PUT(&rscp->h, &rsc_cache);
840 static struct cache_deferred_req* cache_upcall_defer(struct cache_req *req)
844 static struct cache_req cache_upcall_chandle = { cache_upcall_defer };
846 int gss_svc_upcall_handle_init(struct ptlrpc_request *req,
847 struct gss_svc_reqctx *grctx,
848 struct gss_wire_ctx *gw,
849 struct obd_device *target,
854 struct ptlrpc_reply_state *rs;
855 struct rsc *rsci = NULL;
856 struct rsi *rsip = NULL, rsikey;
858 int replen = sizeof(struct ptlrpc_body);
859 struct gss_rep_header *rephdr;
861 int rc = SECSVC_DROP;
864 memset(&rsikey, 0, sizeof(rsikey));
865 rsikey.lustre_svc = lustre_svc;
866 rsikey.nid = (__u64) req->rq_peer.nid;
868 /* duplicate context handle. for INIT it always 0 */
869 if (rawobj_dup(&rsikey.in_handle, &gw->gw_handle)) {
870 CERROR("fail to dup context handle\n");
874 if (rawobj_dup(&rsikey.in_token, in_token)) {
875 CERROR("can't duplicate token\n");
876 rawobj_free(&rsikey.in_handle);
880 rsip = rsi_lookup(&rsikey);
883 CERROR("error in rsi_lookup.\n");
885 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
886 rc = SECSVC_COMPLETE;
891 cache_get(&rsip->h); /* take an extra ref */
892 cfs_waitq_init(&rsip->waitq);
893 cfs_waitlink_init(&wait);
894 cfs_waitq_add(&rsip->waitq, &wait);
897 /* Note each time cache_check() will drop a reference if return
898 * non-zero. We hold an extra reference on initial rsip, but must
899 * take care of following calls. */
900 rc = cache_check(&rsi_cache, &rsip->h, &cache_upcall_chandle);
908 read_lock(&rsi_cache.hash_lock);
909 valid = test_bit(CACHE_VALID, &rsip->h.flags);
911 cfs_set_current_state(CFS_TASK_INTERRUPTIBLE);
912 read_unlock(&rsi_cache.hash_lock);
915 cfs_schedule_timeout(GSS_SVC_UPCALL_TIMEOUT *
921 CWARN("waited %ds timeout, drop\n", GSS_SVC_UPCALL_TIMEOUT);
925 CWARN("cache_check return ENOENT, drop\n");
928 /* if not the first check, we have to release the extra
929 * reference we just added on it. */
931 cache_put(&rsip->h, &rsi_cache);
932 CDEBUG(D_SEC, "cache_check is good\n");
936 cfs_waitq_del(&rsip->waitq, &wait);
937 cache_put(&rsip->h, &rsi_cache);
940 GOTO(out, rc = SECSVC_DROP);
943 rsci = gss_svc_searchbyctx(&rsip->out_handle);
945 CERROR("authentication failed\n");
947 if (!gss_pack_err_notify(req, GSS_S_FAILURE, 0))
948 rc = SECSVC_COMPLETE;
953 grctx->src_ctx = &rsci->ctx;
956 if (rawobj_dup(&rsci->ctx.gsc_rvs_hdl, rvs_hdl)) {
957 CERROR("failed duplicate reverse handle\n");
961 rsci->target = target;
963 CDEBUG(D_SEC, "server create rsc %p(%u->%s)\n",
964 rsci, rsci->ctx.gsc_uid, libcfs_nid2str(req->rq_peer.nid));
966 if (rsip->out_handle.len > PTLRPC_GSS_MAX_HANDLE_SIZE) {
967 CERROR("handle size %u too large\n", rsip->out_handle.len);
968 GOTO(out, rc = SECSVC_DROP);
972 grctx->src_reserve_len = cfs_size_round4(rsip->out_token.len);
974 rc = lustre_pack_reply_v2(req, 1, &replen, NULL, 0);
976 CERROR("failed to pack reply: %d\n", rc);
977 GOTO(out, rc = SECSVC_DROP);
980 rs = req->rq_reply_state;
981 LASSERT(rs->rs_repbuf->lm_bufcount == 3);
982 LASSERT(rs->rs_repbuf->lm_buflens[0] >=
983 sizeof(*rephdr) + rsip->out_handle.len);
984 LASSERT(rs->rs_repbuf->lm_buflens[2] >= rsip->out_token.len);
986 rephdr = lustre_msg_buf(rs->rs_repbuf, 0, 0);
987 rephdr->gh_version = PTLRPC_GSS_VERSION;
988 rephdr->gh_flags = 0;
989 rephdr->gh_proc = PTLRPC_GSS_PROC_ERR;
990 rephdr->gh_major = rsip->major_status;
991 rephdr->gh_minor = rsip->minor_status;
992 rephdr->gh_seqwin = GSS_SEQ_WIN;
993 rephdr->gh_handle.len = rsip->out_handle.len;
994 memcpy(rephdr->gh_handle.data, rsip->out_handle.data,
995 rsip->out_handle.len);
997 memcpy(lustre_msg_buf(rs->rs_repbuf, 2, 0), rsip->out_token.data,
998 rsip->out_token.len);
1000 rs->rs_repdata_len = lustre_shrink_msg(rs->rs_repbuf, 2,
1001 rsip->out_token.len, 0);
1006 /* it looks like here we should put rsip also, but this mess up
1007 * with NFS cache mgmt code... FIXME */
1010 rsi_put(&rsip->h, &rsi_cache);
1014 /* if anything went wrong, we don't keep the context too */
1015 if (rc != SECSVC_OK)
1016 set_bit(CACHE_NEGATIVE, &rsci->h.flags);
1018 CDEBUG(D_SEC, "create rsc with idx "LPX64"\n",
1019 gss_handle_to_u64(&rsci->handle));
1021 COMPAT_RSC_PUT(&rsci->h, &rsc_cache);
1026 struct gss_svc_ctx *gss_svc_upcall_get_ctx(struct ptlrpc_request *req,
1027 struct gss_wire_ctx *gw)
1031 rsc = gss_svc_searchbyctx(&gw->gw_handle);
1033 CWARN("Invalid gss ctx idx "LPX64" from %s\n",
1034 gss_handle_to_u64(&gw->gw_handle),
1035 libcfs_nid2str(req->rq_peer.nid));
1042 void gss_svc_upcall_put_ctx(struct gss_svc_ctx *ctx)
1044 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1046 COMPAT_RSC_PUT(&rsc->h, &rsc_cache);
1049 void gss_svc_upcall_destroy_ctx(struct gss_svc_ctx *ctx)
1051 struct rsc *rsc = container_of(ctx, struct rsc, ctx);
1053 /* can't be found */
1054 set_bit(CACHE_NEGATIVE, &rsc->h.flags);
1055 /* to be removed at next scan */
1056 rsc->h.expiry_time = 1;
1059 int __init gss_init_svc_upcall(void)
1063 spin_lock_init(&__ctx_index_lock);
1065 * this helps reducing context index confliction. after server reboot,
1066 * conflicting request from clients might be filtered out by initial
1067 * sequence number checking, thus no chance to sent error notification
1070 cfs_get_random_bytes(&__ctx_index, sizeof(__ctx_index));
1073 cache_register(&rsi_cache);
1074 cache_register(&rsc_cache);
1076 /* FIXME this looks stupid. we intend to give lsvcgssd a chance to open
1077 * the init upcall channel, otherwise there's big chance that the first
1078 * upcall issued before the channel be opened thus nfsv4 cache code will
1079 * drop the request direclty, thus lead to unnecessary recovery time.
1080 * here we wait at miximum 1.5 seconds. */
1081 for (i = 0; i < 6; i++) {
1082 if (atomic_read(&rsi_cache.readers) > 0)
1084 cfs_set_current_state(TASK_UNINTERRUPTIBLE);
1085 LASSERT(CFS_HZ >= 4);
1086 cfs_schedule_timeout(CFS_HZ / 4);
1089 if (atomic_read(&rsi_cache.readers) == 0)
1090 CWARN("Init channel is not opened by lsvcgssd, following "
1091 "request might be dropped until lsvcgssd is active\n");
1096 void __exit gss_exit_svc_upcall(void)
1098 cache_purge(&rsi_cache);
1099 cache_unregister(&rsi_cache);
1101 cache_purge(&rsc_cache);
1102 cache_unregister(&rsc_cache);