/*
SSSD
LDAP handler for autofs
Authors:
Jakub Hrozek <jhrozek@redhat.com>
Copyright (C) 2012 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 "providers/ldap/ldap_common.h"
#include "providers/ldap/sdap_autofs.h"
#include "providers/ldap/sdap.h"
#include "providers/ldap/sdap_async.h"
#include "providers/backend.h"
#include "providers/data_provider.h"
#include "db/sysdb_autofs.h"
#include "util/util.h"
struct autofs_get_map_state {
struct tevent_context *ev;
struct sdap_id_ctx *ctx;
struct sdap_id_op *op;
const char *map_name;
int dp_error;
};
static errno_t
sdap_autofs_get_map_retry(struct tevent_req *req);
static void
sdap_autofs_get_map_connect_done(struct tevent_req *subreq);
static void
sdap_autofs_get_map_done(struct tevent_req *req);
static struct tevent_req *
sdap_autofs_get_map_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct sdap_id_ctx *ctx,
const char *map_name)
{
struct tevent_req *req;
struct autofs_get_map_state *state;
int ret;
req = tevent_req_create(mem_ctx, &state, struct autofs_get_map_state);
if (!req) return NULL;
state->ev = ev;
state->ctx = ctx;
state->dp_error = DP_ERR_FATAL;
state->map_name = map_name;
state->op = sdap_id_op_create(state, state->ctx->conn->conn_cache);
if (!state->op) {
DEBUG(SSSDBG_OP_FAILURE, "sdap_id_op_create failed\n");
ret = ENOMEM;
goto fail;
}
ret = sdap_autofs_get_map_retry(req);
if (ret != EOK) {
goto fail;
}
return req;
fail:
tevent_req_error(req, ret);
tevent_req_post(req, ev);
return req;
}
static errno_t
sdap_autofs_get_map_retry(struct tevent_req *req)
{
struct autofs_get_map_state *state =
tevent_req_data(req, struct autofs_get_map_state);
struct tevent_req *subreq;
int ret = EOK;
subreq = sdap_id_op_connect_send(state->op, state, &ret);
if (!subreq) {
return ret;
}
tevent_req_set_callback(subreq, sdap_autofs_get_map_connect_done, req);
return EOK;
}
static void
sdap_autofs_get_map_connect_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(subreq,
struct tevent_req);
struct autofs_get_map_state *state =
tevent_req_data(req, struct autofs_get_map_state);
int dp_error = DP_ERR_FATAL;
int ret;
ret = sdap_id_op_connect_recv(subreq, &dp_error);
talloc_zfree(subreq);
if (ret != EOK) {
state->dp_error = dp_error;
tevent_req_error(req, ret);
return;
}
subreq = sdap_autofs_setautomntent_send(state, state->ev,
state->ctx->be->domain,
state->ctx->be->domain->sysdb,
sdap_id_op_handle(state->op),
state->op,
state->ctx->opts,
state->map_name);
if (!subreq) {
DEBUG(SSSDBG_CRIT_FAILURE,
"sdap_autofs_setautomntent_send failed\n");
tevent_req_error(req, ENOMEM);
return;
}
tevent_req_set_callback(subreq, sdap_autofs_get_map_done, req);
}
static void
sdap_autofs_get_map_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(subreq,
struct tevent_req);
struct autofs_get_map_state *state =
tevent_req_data(req, struct autofs_get_map_state);
int dp_error = DP_ERR_FATAL;
int ret;
ret = sdap_autofs_setautomntent_recv(subreq);
talloc_zfree(subreq);
ret = sdap_id_op_done(state->op, ret, &dp_error);
if (dp_error == DP_ERR_OK && ret != EOK) {
/* retry */
ret = sdap_autofs_get_map_retry(req);
if (ret != EOK) {
tevent_req_error(req, ret);
return;
}
return;
}
if (ret && ret != ENOENT) {
state->dp_error = dp_error;
tevent_req_error(req, ret);
return;
}
if (ret == ENOENT) {
ret = sysdb_delete_autofsmap(state->ctx->be->domain, state->map_name);
if (ret != EOK && ret != ENOENT) {
DEBUG(SSSDBG_OP_FAILURE,
"Cannot delete autofs map %s [%d]: %s\n",
state->map_name, ret, strerror(ret));
tevent_req_error(req, ret);
return;
}
}
state->dp_error = DP_ERR_OK;
tevent_req_done(req);
}
static errno_t
sdap_autofs_get_map_recv(struct tevent_req *req, int *dp_error_out)
{
struct autofs_get_map_state *state =
tevent_req_data(req, struct autofs_get_map_state);
if (dp_error_out) {
*dp_error_out = state->dp_error;
}
TEVENT_REQ_RETURN_ON_ERROR(req);
return EOK;
}
struct sdap_autofs_handler_state {
struct dp_reply_std reply;
};
static void sdap_autofs_handler_done(struct tevent_req *subreq);
struct tevent_req *
sdap_autofs_handler_send(TALLOC_CTX *mem_ctx,
struct sdap_id_ctx *id_ctx,
struct dp_autofs_data *data,
struct dp_req_params *params)
{
struct sdap_autofs_handler_state *state;
struct tevent_req *subreq;
struct tevent_req *req;
const char *master_map;
errno_t ret;
req = tevent_req_create(mem_ctx, &state, struct sdap_autofs_handler_state);
if (req == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "tevent_req_create() failed\n");
return NULL;
}
DEBUG(SSSDBG_FUNC_DATA, "Requested refresh for: %s\n", data->mapname);
master_map = dp_opt_get_string(id_ctx->opts->basic,
SDAP_AUTOFS_MAP_MASTER_NAME);
if (strcmp(master_map, data->mapname) == 0) {
DEBUG(SSSDBG_FUNC_DATA, "Refresh of automount master map triggered: "
"%s\n", data->mapname);
ret = sysdb_invalidate_autofs_maps(id_ctx->be->domain);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE, "Could not invalidate autofs maps, "
"backend might return stale entries\n");
}
}
subreq = sdap_autofs_get_map_send(mem_ctx, params->ev,
id_ctx, data->mapname);
if (subreq == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Unable to send request for %s.\n",
data->mapname);
ret = ENOMEM;
goto immediately;
}
tevent_req_set_callback(subreq, sdap_autofs_handler_done, req);
return req;
immediately:
dp_reply_std_set(&state->reply, DP_ERR_DECIDE, ret, NULL);
/* TODO For backward compatibility we always return EOK to DP now. */
tevent_req_done(req);
tevent_req_post(req, params->ev);
return req;
}
static void sdap_autofs_handler_done(struct tevent_req *subreq)
{
struct sdap_autofs_handler_state *state;
struct tevent_req *req;
int dp_error;
errno_t ret;
req = tevent_req_callback_data(subreq, struct tevent_req);
state = tevent_req_data(req, struct sdap_autofs_handler_state);
ret = sdap_autofs_get_map_recv(subreq, &dp_error);
talloc_zfree(subreq);
/* TODO For backward compatibility we always return EOK to DP now. */
dp_reply_std_set(&state->reply, dp_error, ret, NULL);
tevent_req_done(req);
}
errno_t
sdap_autofs_handler_recv(TALLOC_CTX *mem_ctx,
struct tevent_req *req,
struct dp_reply_std *data)
{
struct sdap_autofs_handler_state *state = NULL;
state = tevent_req_data(req, struct sdap_autofs_handler_state);
TEVENT_REQ_RETURN_ON_ERROR(req);
*data = state->reply;
return EOK;
}
errno_t sdap_autofs_init(TALLOC_CTX *mem_ctx,
struct be_ctx *be_ctx,
struct sdap_id_ctx *id_ctx,
struct dp_method *dp_methods)
{
errno_t ret;
DEBUG(SSSDBG_TRACE_INTERNAL, "Initializing autofs LDAP back end\n");
ret = ldap_get_autofs_options(id_ctx, be_ctx->cdb, be_ctx->conf_path,
id_ctx->opts);
if (ret != EOK) {
return ret;
}
dp_set_method(dp_methods, DPM_AUTOFS_HANDLER,
sdap_autofs_handler_send, sdap_autofs_handler_recv, id_ctx,
struct sdap_id_ctx, struct dp_autofs_data, struct dp_reply_std);
return EOK;
}