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/*
Authors:
Pavel Březina <pbrezina@redhat.com>
Copyright (C) 2011 Red Hat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <tevent.h>
#include "util/util.h"
#include "providers/ldap/ldap_common.h"
#include "providers/ldap/sdap_sudo_timer.h"
#include "providers/ldap/sdap_sudo.h"
#include "db/sysdb_sudo.h"
struct sdap_sudo_refresh_ctx {
struct be_ctx *be_ctx;
struct sdap_id_ctx *id_ctx;
struct sdap_options *opts;
struct timeval last_refresh;
};
static void sdap_sudo_refresh_timer(struct tevent_context *ev,
struct tevent_timer *tt,
struct timeval tv, void *pvt);
static void sdap_sudo_refresh_reschedule(struct tevent_req *req);
static void sdap_sudo_refresh_timeout(struct tevent_context *ev,
struct tevent_timer *te,
struct timeval tv, void *pvt);
struct sdap_sudo_refresh_ctx *
sdap_sudo_refresh_ctx_init(TALLOC_CTX *mem_ctx,
struct be_ctx *be_ctx,
struct sdap_id_ctx *id_ctx,
struct sdap_options *opts,
struct timeval last_refresh)
{
struct sdap_sudo_refresh_ctx *refresh_ctx = NULL;
refresh_ctx = talloc_zero(mem_ctx, struct sdap_sudo_refresh_ctx);
if (refresh_ctx == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("talloc_zero() failed!\n"));
return NULL;
}
refresh_ctx->be_ctx = be_ctx;
refresh_ctx->id_ctx = id_ctx;
refresh_ctx->opts = opts;
refresh_ctx->last_refresh = last_refresh;
return refresh_ctx;
}
int sdap_sudo_refresh_set_timer(struct sdap_sudo_refresh_ctx *ctx,
struct timeval tv)
{
struct tevent_timer *enum_task;
DEBUG(SSSDBG_TRACE_FUNC, ("Scheduling next refresh of SUDO rules at "
"%ld.%ld\n", (long)tv.tv_sec, (long)tv.tv_usec));
enum_task = tevent_add_timer(ctx->be_ctx->ev, ctx,
tv, sdap_sudo_refresh_timer, ctx);
if (!enum_task) {
DEBUG(SSSDBG_FATAL_FAILURE,
("FATAL: failed to setup SUDO rules refresh task!\n"));
return EFAULT;
}
return EOK;
}
static void sdap_sudo_refresh_timer(struct tevent_context *ev,
struct tevent_timer *tt,
struct timeval tv, void *pvt)
{
struct sdap_sudo_refresh_ctx *refresh_ctx = NULL;
struct be_sudo_req *sudo_req = NULL;
struct tevent_timer *timeout = NULL;
struct tevent_req *req = NULL;
int delay = 0;
int ret;
refresh_ctx = talloc_get_type(pvt, struct sdap_sudo_refresh_ctx);
delay = dp_opt_get_int(refresh_ctx->opts->basic, SDAP_SUDO_REFRESH_TIMEOUT);
if (be_is_offline(refresh_ctx->be_ctx)) {
DEBUG(SSSDBG_TRACE_FUNC, ("Backend is marked offline, retry later!\n"));
tv = tevent_timeval_current_ofs(delay, 0);
ret = sdap_sudo_refresh_set_timer(refresh_ctx, tv);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Error setting up SUDO refresh timer\n"));
}
return;
}
/* create sudo context */
sudo_req = talloc_zero(refresh_ctx, struct be_sudo_req);
if (sudo_req == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("talloc_zero() failed!\n"));
tv = tevent_timeval_current_ofs(delay, 0);
ret = sdap_sudo_refresh_set_timer(refresh_ctx, tv);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Error setting up SUDO refresh timer\n"));
}
return;
}
sudo_req->type = BE_REQ_SUDO_ALL;
sudo_req->username = NULL;
/* send request */
req = sdap_sudo_refresh_send(refresh_ctx, refresh_ctx->id_ctx->be, sudo_req,
refresh_ctx->id_ctx->opts,
refresh_ctx->id_ctx->conn_cache);
if (req == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to schedule refresh of SUDO rules, "
"retrying later!\n"));
tv = tevent_timeval_current_ofs(delay, 0);
ret = sdap_sudo_refresh_set_timer(refresh_ctx, tv);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Error setting up SUDO refresh timer\n"));
}
talloc_free(sudo_req);
return;
}
refresh_ctx->last_refresh = tevent_timeval_current();
talloc_steal(req, sudo_req); /* make it free with req */
tevent_req_set_callback(req, sdap_sudo_refresh_reschedule, refresh_ctx);
/* schedule timeout */
tv = tevent_timeval_current_ofs(delay, 0);
timeout = tevent_add_timer(refresh_ctx->be_ctx->ev, req, tv,
sdap_sudo_refresh_timeout, req);
if (timeout == NULL) {
/* If we can't guarantee a timeout, we
* need to cancel the request, to avoid
* the possibility of starting another
* concurrently
*/
talloc_zfree(req);
DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to schedule refresh of SUDO rules, "
"retrying later!\n"));
tv = tevent_timeval_current_ofs(delay, 0);
ret = sdap_sudo_refresh_set_timer(refresh_ctx, tv);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Error setting up SUDO refresh timer\n"));
}
}
return;
}
static void sdap_sudo_refresh_reschedule(struct tevent_req *req)
{
struct sdap_sudo_refresh_ctx *refresh_ctx = NULL;
struct timeval tv;
int delay;
int dp_error;
int error;
int ret;
refresh_ctx = tevent_req_callback_data(req, struct sdap_sudo_refresh_ctx);
ret = sdap_sudo_refresh_recv(req, &dp_error, &error);
talloc_zfree(req);
if (ret != EOK) {
tv = tevent_timeval_current();
} else {
tv = refresh_ctx->last_refresh;
/* Ok, we've completed a refresh. Save this to the
* sysdb so we can postpone starting up the refresh
* process on the next SSSD service restart (to avoid
* slowing down system boot-up
*/
ret = sysdb_sudo_set_refreshed(refresh_ctx->be_ctx->sysdb, true);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE,
("Could not mark domain as having refreshed.\n"));
/* This error is non-fatal, so continue */
}
}
delay = dp_opt_get_int(refresh_ctx->opts->basic, SDAP_SUDO_REFRESH_TIMEOUT);
tv = tevent_timeval_add(&tv, delay, 0);
ret = sdap_sudo_refresh_set_timer(refresh_ctx, tv);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Error setting up SUDO refresh timer\n"));
}
}
static void sdap_sudo_refresh_timeout(struct tevent_context *ev,
struct tevent_timer *te,
struct timeval tv, void *pvt)
{
struct tevent_req *req = talloc_get_type(pvt, struct tevent_req);
struct sdap_sudo_refresh_ctx *refresh_ctx = NULL;
int delay;
refresh_ctx = tevent_req_callback_data(req, struct sdap_sudo_refresh_ctx);
delay = dp_opt_get_int(refresh_ctx->opts->basic, SDAP_SUDO_REFRESH_TIMEOUT);
DEBUG(SSSDBG_CRIT_FAILURE, ("Refreshing SUDO rules timed out!"
" Timeout too small? (%ds)!\n", delay));
tv = tevent_timeval_current_ofs(delay, 0);
sdap_sudo_refresh_set_timer(refresh_ctx, tv);
talloc_zfree(req);
}
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