4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2014, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/utils/gss/lgss_keyring.c
34 * user-space upcall to create GSS context, using keyring interface to kernel
36 * Author: Eric Mei <ericm@clusterfs.com>
48 #include <gssapi/gssapi.h>
50 #include <libcfs/util/param.h>
51 #include <libcfs/util/string.h>
53 #include "lgss_utils.h"
54 #include "write_bytes.h"
58 * gss target string of lustre service we are negotiating for
60 static char *g_service = NULL;
63 * all data about negotiation
65 struct lgss_nego_data {
66 uint32_t lnd_established:1;
73 gss_OID lnd_mech; /* mech OID */
74 gss_name_t lnd_svc_name; /* service name */
75 unsigned int lnd_req_flags; /* request flags */
76 gss_cred_id_t lnd_cred; /* credential */
77 gss_ctx_id_t lnd_ctx; /* session context */
78 gss_buffer_desc lnd_rmt_ctx; /* remote handle of context */
79 gss_buffer_desc lnd_ctx_token; /* context token for kernel */
80 uint32_t lnd_seq_win; /* sequence window */
87 * context creation response
89 struct lgss_init_res {
90 gss_buffer_desc gr_ctx; /* context handle */
91 unsigned int gr_major; /* major status */
92 unsigned int gr_minor; /* minor status */
93 unsigned int gr_win; /* sequence window */
94 gss_buffer_desc gr_token; /* token */
97 struct keyring_upcall_param {
106 uint64_t kup_selfnid;
110 unsigned int kup_is_root:1,
115 /****************************************
116 * child process: gss negotiation *
117 ****************************************/
119 int do_nego_rpc(struct lgss_nego_data *lnd,
120 gss_buffer_desc *gss_token,
121 struct lgss_init_res *gr)
123 struct lgssd_ioctl_param param;
131 logmsg(LL_TRACE, "start negotiation rpc\n");
133 pw = getpwuid(lnd->lnd_uid);
135 logmsg(LL_ERR, "no uid %u in local user database\n",
140 param.version = GSSD_INTERFACE_VERSION;
141 param.secid = lnd->lnd_secid;
142 param.uuid = lnd->lnd_uuid;
143 param.lustre_svc = lnd->lnd_lsvc;
144 param.uid = lnd->lnd_uid;
145 param.gid = pw->pw_gid;
146 param.send_token_size = gss_token->length;
147 param.send_token = (char *) gss_token->value;
148 param.reply_buf_size = sizeof(outbuf);
149 param.reply_buf = outbuf;
151 rc = cfs_get_param_paths(&path, "sptlrpc/gss/init_channel");
155 logmsg(LL_TRACE, "to open %s\n", path.gl_pathv[0]);
157 fd = open(path.gl_pathv[0], O_WRONLY);
159 logmsg(LL_ERR, "can't open %s\n", path.gl_pathv[0]);
164 logmsg(LL_TRACE, "to down-write\n");
166 ret = write(fd, ¶m, sizeof(param));
168 if (ret != sizeof(param)) {
169 logmsg(LL_ERR, "lustre ioctl err: %s\n", strerror(errno));
174 logmsg(LL_TRACE, "do_nego_rpc: to parse reply\n");
176 logmsg(LL_ERR, "status: %ld (%s)\n",
177 param.status, strerror((int)(-param.status)));
179 /* kernel return -ETIMEDOUT means the rpc timedout, we should
180 * notify the caller to reinitiate the gss negotiation, by
181 * returning -ERESTART
183 if (param.status == -ETIMEDOUT)
190 p = (unsigned int *)outbuf;
196 gr->gr_ctx.length = *p++;
197 gr->gr_ctx.value = malloc(gr->gr_ctx.length);
198 if (gr->gr_ctx.value == NULL)
200 memcpy(gr->gr_ctx.value, p, gr->gr_ctx.length);
201 p += (((gr->gr_ctx.length + 3) & ~3) / 4);
203 gr->gr_token.length = *p++;
204 gr->gr_token.value = malloc(gr->gr_token.length);
205 if (gr->gr_token.value == NULL) {
206 free(gr->gr_ctx.value);
209 memcpy(gr->gr_token.value, p, gr->gr_token.length);
210 p += (((gr->gr_token.length + 3) & ~3) / 4);
212 logmsg(LL_DEBUG, "do_nego_rpc: receive handle len %zu, token len %zu, "
213 "res %d\n", gr->gr_ctx.length, gr->gr_token.length, res);
215 cfs_free_param_data(&path);
219 /* This is used by incomplete GSSAPI implementations that can't use
220 * gss_init_sec_context and will parse the token themselves (gssnull and sk).
221 * Callers should have cred->lc_mech_token pointing to a gss_buffer_desc
222 * token to send to the peer as part of the SEC_CTX_INIT operation. The return
223 * RPC's token with be in gr.gr_token which is validated using
224 * lgss_validate_cred. */
225 static int lgssc_negotiation_manual(struct lgss_nego_data *lnd,
226 struct lgss_cred *cred)
228 struct lgss_init_res gr;
232 logmsg(LL_TRACE, "starting gss negotation\n");
233 memset(&gr, 0, sizeof(gr));
235 lnd->lnd_rpc_err = do_nego_rpc(lnd, &cred->lc_mech_token, &gr);
236 if (lnd->lnd_rpc_err) {
237 logmsg(LL_ERR, "negotiation rpc error %d\n", lnd->lnd_rpc_err);
238 rc = lnd->lnd_rpc_err;
242 if (gr.gr_major == GSS_S_CONTINUE_NEEDED) {
246 } else if (gr.gr_major != GSS_S_COMPLETE) {
247 lnd->lnd_gss_err = gr.gr_major;
248 logmsg(LL_ERR, "negotiation gss error %x\n", lnd->lnd_gss_err);
253 if (gr.gr_ctx.length == 0 || gr.gr_token.length == 0) {
254 logmsg(LL_ERR, "zero length context or token received\n");
259 rc = lgss_validate_cred(cred, &gr.gr_token, &lnd->lnd_ctx_token);
261 logmsg(LL_ERR, "peer token failed validation\n");
265 lnd->lnd_established = 1;
266 lnd->lnd_seq_win = gr.gr_win;
267 lnd->lnd_rmt_ctx = gr.gr_ctx;
269 if (gr.gr_token.length != 0)
270 gss_release_buffer(&min_stat, &gr.gr_token);
272 logmsg(LL_DEBUG, "successfully negotiated a context\n");
276 if (gr.gr_ctx.length != 0)
277 gss_release_buffer(&min_stat, &gr.gr_ctx);
278 if (gr.gr_token.length != 0)
279 gss_release_buffer(&min_stat, &gr.gr_token);
285 * if return error, the lnd_rpc_err or lnd_gss_err is set.
287 static int lgssc_negotiation(struct lgss_nego_data *lnd)
289 struct lgss_init_res gr;
290 gss_buffer_desc *recv_tokenp, send_token;
291 OM_uint32 maj_stat, min_stat, ret_flags;
293 logmsg(LL_TRACE, "start gss negotiation\n");
295 /* GSS context establishment loop. */
296 memset(&gr, 0, sizeof(gr));
297 recv_tokenp = GSS_C_NO_BUFFER;
300 maj_stat = gss_init_sec_context(&min_stat,
309 NULL, /* used mech */
312 NULL); /* time rec */
314 if (recv_tokenp != GSS_C_NO_BUFFER) {
315 gss_release_buffer(&min_stat, &gr.gr_token);
316 recv_tokenp = GSS_C_NO_BUFFER;
319 if (maj_stat != GSS_S_COMPLETE &&
320 maj_stat != GSS_S_CONTINUE_NEEDED) {
321 lnd->lnd_gss_err = maj_stat;
323 logmsg_gss(LL_ERR, lnd->lnd_mech, maj_stat, min_stat,
324 "failed init context");
328 if (send_token.length != 0) {
329 memset(&gr, 0, sizeof(gr));
331 lnd->lnd_rpc_err = do_nego_rpc(lnd, &send_token, &gr);
332 gss_release_buffer(&min_stat, &send_token);
334 if (lnd->lnd_rpc_err) {
335 logmsg(LL_ERR, "negotiation rpc error: %d\n",
340 if (gr.gr_major != GSS_S_COMPLETE &&
341 gr.gr_major != GSS_S_CONTINUE_NEEDED) {
342 lnd->lnd_gss_err = gr.gr_major;
344 logmsg(LL_ERR, "negotiation gss error %x\n",
349 if (gr.gr_ctx.length != 0) {
350 if (lnd->lnd_rmt_ctx.value)
351 gss_release_buffer(&min_stat,
353 lnd->lnd_rmt_ctx = gr.gr_ctx;
356 if (gr.gr_token.length != 0) {
357 if (maj_stat != GSS_S_CONTINUE_NEEDED)
359 recv_tokenp = &gr.gr_token;
363 /* GSS_S_COMPLETE => check gss header verifier,
364 * usually checked in gss_validate
366 if (maj_stat == GSS_S_COMPLETE) {
367 lnd->lnd_established = 1;
368 lnd->lnd_seq_win = gr.gr_win;
373 /* End context negotiation loop. */
374 if (!lnd->lnd_established) {
375 if (gr.gr_token.length != 0)
376 gss_release_buffer(&min_stat, &gr.gr_token);
378 if (lnd->lnd_gss_err == GSS_S_COMPLETE)
379 lnd->lnd_rpc_err = -EACCES;
381 logmsg(LL_ERR, "context negotiation failed\n");
385 logmsg(LL_DEBUG, "successfully negotiated a context\n");
390 * if return error, the lnd_rpc_err or lnd_gss_err is set.
392 static int lgssc_init_nego_data(struct lgss_nego_data *lnd,
393 struct keyring_upcall_param *kup,
396 gss_buffer_desc sname;
397 OM_uint32 maj_stat, min_stat;
399 memset(lnd, 0, sizeof(*lnd));
401 lnd->lnd_secid = kup->kup_secid;
402 lnd->lnd_uid = kup->kup_uid;
403 lnd->lnd_lsvc = kup->kup_svc | mech << LUSTRE_GSS_MECH_SHIFT;
404 lnd->lnd_uuid = kup->kup_tgt;
406 lnd->lnd_established = 0;
407 lnd->lnd_svc_name = GSS_C_NO_NAME;
408 lnd->lnd_cred = GSS_C_NO_CREDENTIAL;
409 lnd->lnd_ctx = GSS_C_NO_CONTEXT;
410 lnd->lnd_rmt_ctx = (gss_buffer_desc) GSS_C_EMPTY_BUFFER;
411 lnd->lnd_seq_win = 0;
415 lnd->lnd_mech = (gss_OID)&krb5oid;
416 lnd->lnd_req_flags = GSS_C_MUTUAL_FLAG;
419 lnd->lnd_mech = (gss_OID)&nulloid;
421 #ifdef HAVE_OPENSSL_SSK
423 lnd->lnd_mech = (gss_OID)&skoid;
424 lnd->lnd_req_flags = GSS_C_MUTUAL_FLAG;
428 logmsg(LL_ERR, "invalid mech: %d\n", mech);
429 lnd->lnd_rpc_err = -EACCES;
433 sname.value = g_service;
434 sname.length = strlen(g_service);
436 maj_stat = gss_import_name(&min_stat, &sname,
437 (gss_OID) GSS_C_NT_HOSTBASED_SERVICE,
439 if (maj_stat != GSS_S_COMPLETE) {
440 logmsg_gss(LL_ERR, lnd->lnd_mech, maj_stat, min_stat,
441 "can't import svc name");
442 lnd->lnd_gss_err = maj_stat;
449 void lgssc_fini_nego_data(struct lgss_nego_data *lnd)
451 OM_uint32 maj_stat, min_stat;
453 if (lnd->lnd_svc_name != GSS_C_NO_NAME) {
454 maj_stat = gss_release_name(&min_stat, &lnd->lnd_svc_name);
455 if (maj_stat != GSS_S_COMPLETE)
456 logmsg_gss(LL_ERR, lnd->lnd_mech, maj_stat, min_stat,
457 "can't release service name");
460 if (lnd->lnd_cred != GSS_C_NO_CREDENTIAL) {
461 maj_stat = gss_release_cred(&min_stat, &lnd->lnd_cred);
462 if (maj_stat != GSS_S_COMPLETE)
463 logmsg_gss(LL_ERR, lnd->lnd_mech, maj_stat, min_stat,
464 "can't release credential");
469 int error_kernel_key(key_serial_t keyid, int rpc_error, int gss_error)
475 logmsg(LL_TRACE, "revoking kernel key %08x\n", keyid);
478 end = buf + sizeof(buf);
480 WRITE_BYTES(&p, end, seqwin);
481 WRITE_BYTES(&p, end, rpc_error);
482 WRITE_BYTES(&p, end, gss_error);
485 if (keyctl_update(keyid, buf, p - buf)) {
486 if (errno != EAGAIN) {
487 logmsg(LL_ERR, "revoke key %08x: %s\n",
488 keyid, strerror(errno));
492 logmsg(LL_WARN, "key %08x: revoking too soon, try again\n",
498 logmsg(LL_INFO, "key %08x: revoked\n", keyid);
503 int update_kernel_key(key_serial_t keyid,
504 struct lgss_nego_data *lnd,
505 gss_buffer_desc *ctx_token)
507 char *buf = NULL, *p = NULL, *end = NULL;
508 unsigned int buf_size = 0;
511 logmsg(LL_TRACE, "updating kernel key %08x\n", keyid);
513 buf_size = sizeof(lnd->lnd_seq_win) +
514 sizeof(lnd->lnd_rmt_ctx.length) + lnd->lnd_rmt_ctx.length +
515 sizeof(ctx_token->length) + ctx_token->length;
516 buf = malloc(buf_size);
518 logmsg(LL_ERR, "key %08x: can't alloc update buf: size %d\n",
524 end = buf + buf_size;
527 if (WRITE_BYTES(&p, end, lnd->lnd_seq_win))
529 if (write_buffer(&p, end, &lnd->lnd_rmt_ctx))
531 if (write_buffer(&p, end, ctx_token))
535 if (keyctl_update(keyid, buf, p - buf)) {
536 if (errno != EAGAIN) {
537 logmsg(LL_ERR, "update key %08x: %s\n",
538 keyid, strerror(errno));
542 logmsg(LL_DEBUG, "key %08x: updating too soon, try again\n",
549 logmsg(LL_DEBUG, "key %08x: updated\n", keyid);
555 static int lgssc_kr_negotiate_krb(key_serial_t keyid, struct lgss_cred *cred,
556 struct keyring_upcall_param *kup)
558 struct lgss_nego_data lnd;
562 memset(&lnd, 0, sizeof(lnd));
564 if (lgss_get_service_str(&g_service, kup->kup_svc, kup->kup_nid)) {
565 logmsg(LL_ERR, "key %08x: failed to construct service "
567 error_kernel_key(keyid, -EACCES, 0);
571 if (lgss_using_cred(cred)) {
572 logmsg(LL_ERR, "key %08x: can't using cred\n", keyid);
573 error_kernel_key(keyid, -EACCES, 0);
577 if (lgssc_init_nego_data(&lnd, kup, cred->lc_mech->lmt_mech_n)) {
578 logmsg(LL_ERR, "key %08x: failed to initialize "
579 "negotiation data\n", keyid);
580 error_kernel_key(keyid, lnd.lnd_rpc_err, lnd.lnd_gss_err);
584 rc = lgssc_negotiation(&lnd);
586 logmsg(LL_ERR, "key %08x: failed to negotiation\n", keyid);
587 error_kernel_key(keyid, lnd.lnd_rpc_err, lnd.lnd_gss_err);
591 rc = serialize_context_for_kernel(lnd.lnd_ctx, &lnd.lnd_ctx_token,
594 logmsg(LL_ERR, "key %08x: failed to export context\n", keyid);
595 error_kernel_key(keyid, rc, lnd.lnd_gss_err);
599 rc = update_kernel_key(keyid, &lnd, &lnd.lnd_ctx_token);
604 logmsg(LL_INFO, "key %08x for user %u is updated OK!\n",
605 keyid, kup->kup_uid);
607 if (lnd.lnd_ctx_token.length != 0)
608 gss_release_buffer(&min_stat, &lnd.lnd_ctx_token);
610 lgssc_fini_nego_data(&lnd);
613 lgss_release_cred(cred);
617 static int lgssc_kr_negotiate_manual(key_serial_t keyid, struct lgss_cred *cred,
618 struct keyring_upcall_param *kup)
620 struct lgss_nego_data lnd;
625 memset(&lnd, 0, sizeof(lnd));
627 rc = lgss_get_service_str(&g_service, kup->kup_svc, kup->kup_nid);
629 logmsg(LL_ERR, "key %08x: failed to construct service "
631 error_kernel_key(keyid, -EACCES, 0);
635 rc = lgss_using_cred(cred);
637 logmsg(LL_ERR, "key %08x: can't use cred\n", keyid);
638 error_kernel_key(keyid, -EACCES, 0);
642 rc = lgssc_init_nego_data(&lnd, kup, cred->lc_mech->lmt_mech_n);
644 logmsg(LL_ERR, "key %08x: failed to initialize "
645 "negotiation data\n", keyid);
646 error_kernel_key(keyid, lnd.lnd_rpc_err, lnd.lnd_gss_err);
651 * Handles the negotiation but then calls lgss_validate to make sure
652 * the token is valid. It also populates the lnd_ctx_token for the
653 * update to the kernel key
655 rc = lgssc_negotiation_manual(&lnd, cred);
657 logmsg(LL_ERR, "Failed negotiation must retry\n");
661 logmsg(LL_ERR, "key %08x: failed to negotiate\n", keyid);
662 error_kernel_key(keyid, lnd.lnd_rpc_err, lnd.lnd_gss_err);
666 rc = update_kernel_key(keyid, &lnd, &lnd.lnd_ctx_token);
670 logmsg(LL_INFO, "key %08x for user %u is updated OK!\n",
671 keyid, kup->kup_uid);
673 if (lnd.lnd_ctx_token.length != 0)
674 gss_release_buffer(&min_stat, &lnd.lnd_ctx_token);
676 lgssc_fini_nego_data(&lnd);
679 lgss_release_cred(cred);
684 * note we inherited assumed authority from parent process
686 static int lgssc_kr_negotiate(key_serial_t keyid, struct lgss_cred *cred,
687 struct keyring_upcall_param *kup)
691 logmsg(LL_TRACE, "child start on behalf of key %08x: "
692 "cred %p, uid %u, svc %u, nid %"PRIx64", uids: %u:%u/%u:%u\n",
693 keyid, cred, cred->lc_uid, cred->lc_tgt_svc, cred->lc_tgt_nid,
694 kup->kup_uid, kup->kup_gid, kup->kup_fsuid, kup->kup_fsgid);
696 switch (cred->lc_mech->lmt_mech_n) {
699 rc = lgssc_kr_negotiate_manual(keyid, cred, kup);
703 rc = lgssc_kr_negotiate_krb(keyid, cred, kup);
711 * call out info format: s[:s]...
713 * [1]: mech_name (string)
716 * [4]: flags (string) FMT: r-root; m-mdt; o-ost
717 * [5]: svc type (char)
718 * [6]: lustre_svc (int)
719 * [7]: target_nid (uint64)
720 * [8]: target_uuid (string)
721 * [9]: self_nid (uint64)
723 static int parse_callout_info(const char *coinfo,
724 struct keyring_upcall_param *uparam)
726 const int nargs = 10;
733 length = strlen(coinfo) + 1;
735 logmsg(LL_ERR, "coinfo too long\n");
738 memcpy(buf, coinfo, length);
740 for (i = 0; i < nargs - 1; i++) {
741 pos = strchr(string, ':');
743 logmsg(LL_ERR, "short of components\n");
753 logmsg(LL_TRACE, "components: %s,%s,%s,%s,%s,%c,%s,%s,%s,%s\n",
754 data[0], data[1], data[2], data[3], data[4], data[5][0],
755 data[6], data[7], data[8], data[9]);
757 uparam->kup_secid = strtol(data[0], NULL, 0);
758 strlcpy(uparam->kup_mech, data[1], sizeof(uparam->kup_mech));
759 uparam->kup_uid = strtol(data[2], NULL, 0);
760 uparam->kup_gid = strtol(data[3], NULL, 0);
761 if (strchr(data[4], 'r'))
762 uparam->kup_is_root = 1;
763 if (strchr(data[4], 'm'))
764 uparam->kup_is_mdt = 1;
765 if (strchr(data[4], 'o'))
766 uparam->kup_is_ost = 1;
767 uparam->kup_svc_type = data[5][0];
768 uparam->kup_svc = strtol(data[6], NULL, 0);
769 uparam->kup_nid = strtoll(data[7], NULL, 0);
770 strlcpy(uparam->kup_tgt, data[8], sizeof(uparam->kup_tgt));
771 uparam->kup_selfnid = strtoll(data[9], NULL, 0);
773 logmsg(LL_DEBUG, "parse call out info: secid %d, mech %s, ugid %u:%u, "
774 "is_root %d, is_mdt %d, is_ost %d, svc type %c, svc %d, "
775 "nid 0x%"PRIx64", tgt %s, self nid 0x%"PRIx64"\n",
776 uparam->kup_secid, uparam->kup_mech,
777 uparam->kup_uid, uparam->kup_gid,
778 uparam->kup_is_root, uparam->kup_is_mdt, uparam->kup_is_ost,
779 uparam->kup_svc_type, uparam->kup_svc, uparam->kup_nid,
780 uparam->kup_tgt, uparam->kup_selfnid);
784 static void set_log_level()
790 if (cfs_get_param_paths(&path,
791 "sptlrpc/gss/lgss_keyring/debug_level") != 0)
793 file = fopen(path.gl_pathv[0], "r");
795 cfs_free_param_data(&path);
799 if (fscanf(file, "%u", &level) != 1)
805 lgss_set_loglevel(level);
807 cfs_free_param_data(&path);
811 /****************************************
813 ****************************************/
815 int main(int argc, char *argv[])
817 struct keyring_upcall_param uparam;
820 key_serial_t inst_keyring;
822 struct lgss_mech_type *mech;
823 struct lgss_cred *cred;
827 logmsg(LL_TRACE, "start parsing parameters\n");
829 * parse & sanity check upcall parameters
830 * expected to be called with:
834 * [4]: key description
838 * [8]: thread keyring
839 * [9]: process keyring
840 * [10]: session keyring
842 if (argc != 10 + 1) {
843 logmsg(LL_ERR, "invalid parameter number %d\n", argc);
847 logmsg(LL_INFO, "key %s, desc %s, ugid %s:%s, sring %s, coinfo %s\n",
848 argv[2], argv[4], argv[6], argv[7], argv[10], argv[5]);
850 memset(&uparam, 0, sizeof(uparam));
852 if (strcmp(argv[1], "create") != 0) {
853 logmsg(LL_ERR, "invalid OP %s\n", argv[1]);
857 if (sscanf(argv[2], "%d", &keyid) != 1) {
858 logmsg(LL_ERR, "can't extract KeyID: %s\n", argv[2]);
862 if (sscanf(argv[6], "%d", &uparam.kup_fsuid) != 1) {
863 logmsg(LL_ERR, "can't extract UID: %s\n", argv[6]);
867 if (sscanf(argv[7], "%d", &uparam.kup_fsgid) != 1) {
868 logmsg(LL_ERR, "can't extract GID: %s\n", argv[7]);
872 if (sscanf(argv[10], "%d", &sring) != 1) {
873 logmsg(LL_ERR, "can't extract session keyring: %s\n", argv[10]);
877 if (parse_callout_info(argv[5], &uparam)) {
878 logmsg(LL_ERR, "can't extract callout info: %s\n", argv[5]);
882 logmsg(LL_TRACE, "parsing parameters OK\n");
887 mech = lgss_name2mech(uparam.kup_mech);
889 logmsg(LL_ERR, "key %08x: unsupported mech: %s\n",
890 keyid, uparam.kup_mech);
894 if (lgss_mech_initialize(mech)) {
895 logmsg(LL_ERR, "key %08x: can't initialize mech %s\n",
896 keyid, mech->lmt_name);
900 cred = lgss_create_cred(mech);
902 logmsg(LL_ERR, "key %08x: can't create a new %s cred\n",
903 keyid, mech->lmt_name);
907 cred->lc_uid = uparam.kup_uid;
908 cred->lc_root_flags |= uparam.kup_is_root ? LGSS_ROOT_CRED_ROOT : 0;
909 cred->lc_root_flags |= uparam.kup_is_mdt ? LGSS_ROOT_CRED_MDT : 0;
910 cred->lc_root_flags |= uparam.kup_is_ost ? LGSS_ROOT_CRED_OST : 0;
911 cred->lc_tgt_nid = uparam.kup_nid;
912 cred->lc_tgt_svc = uparam.kup_svc;
913 cred->lc_tgt_uuid = uparam.kup_tgt;
914 cred->lc_svc_type = uparam.kup_svc_type;
915 cred->lc_self_nid = uparam.kup_selfnid;
917 if (lgss_prepare_cred(cred)) {
918 logmsg(LL_ERR, "key %08x: failed to prepare credentials "
919 "for user %d\n", keyid, uparam.kup_uid);
923 /* pre initialize the key. note the keyring linked to is actually of the
924 * original requesting process, not _this_ upcall process. if it's for
925 * root user, don't link to any keyrings because we want fully control
926 * on it, and share it among all root sessions; otherswise link to
929 if (cred->lc_root_flags != 0)
932 inst_keyring = KEY_SPEC_SESSION_KEYRING;
934 if (keyctl_instantiate(keyid, NULL, 0, inst_keyring)) {
935 logmsg(LL_ERR, "instantiate key %08x: %s\n",
936 keyid, strerror(errno));
940 logmsg(LL_TRACE, "instantiated kernel key %08x\n", keyid);
943 * fork a child to do the real gss negotiation
947 logmsg(LL_ERR, "key %08x: can't create child: %s\n",
948 keyid, strerror(errno));
950 } else if (child == 0) {
951 return lgssc_kr_negotiate(keyid, cred, &uparam);
954 logmsg(LL_TRACE, "forked child %d\n", child);