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/*
Authors:
Pavel Březina <pbrezina@redhat.com>
Copyright (C) 2016 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 "responder/nss/nss_private.h"
#include "responder/nss/nss_iface.h"
#include "sss_iface/sss_iface_async.h"
static void
sss_nss_update_initgr_memcache(struct sss_nss_ctx *nctx,
const char *fq_name, const char *domain,
int gnum, uint32_t *groups)
{
TALLOC_CTX *tmp_ctx = NULL;
struct sss_domain_info *dom;
struct ldb_result *res;
struct sized_string *delete_name;
bool changed = false;
uint32_t id;
uint32_t gids[gnum];
int ret;
int i, j;
for (dom = nctx->rctx->domains;
dom;
dom = get_next_domain(dom, SSS_GND_DESCEND)) {
if (strcasecmp(dom->name, domain) == 0) {
break;
}
}
if (dom == NULL) {
DEBUG(SSSDBG_OP_FAILURE,
"Unknown domain (%s) requested by provider\n", domain);
return;
}
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return;
}
ret = sized_output_name(tmp_ctx, nctx->rctx, fq_name, dom, &delete_name);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE,
"sized_output_name failed for '%s': %d [%s]\n",
fq_name, ret, sss_strerror(ret));
goto done;
}
ret = sysdb_initgroups(tmp_ctx, dom, fq_name, &res);
if (ret != EOK && ret != ENOENT) {
DEBUG(SSSDBG_CRIT_FAILURE,
"sysdb_initgroups() failed [%d][%s]\n",
ret, strerror(ret));
goto done;
}
/* copy, we need the original intact in case we need to invalidate
* all the original groups */
memcpy(gids, groups, gnum * sizeof(uint32_t));
if (ret == ENOENT || res->count == 0) {
/* The user is gone. Invalidate the mc record */
ret = sss_mmap_cache_pw_invalidate(&nctx->pwd_mc_ctx, delete_name);
if (ret != EOK && ret != ENOENT) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Internal failure in memory cache code: %d [%s]\n",
ret, strerror(ret));
}
/* Also invalidate his groups */
changed = true;
} else {
/* we skip the first entry, it's the user itself */
for (i = 0; i < res->count; i++) {
id = ldb_msg_find_attr_as_uint(res->msgs[i], SYSDB_GIDNUM, 0);
if (id == 0) {
/* probably non-POSIX group, skip */
continue;
}
for (j = 0; j < gnum; j++) {
if (gids[j] == id) {
gids[j] = 0;
break;
}
}
if (j >= gnum) {
/* we couldn't find a match, this means the groups have
* changed after the refresh */
changed = true;
break;
}
}
if (!changed) {
for (j = 0; j < gnum; j++) {
if (gids[j] != 0) {
/* we found an un-cleared groups, this means the groups
* have changed after the refresh (some got deleted) */
changed = true;
break;
}
}
}
}
if (changed) {
for (i = 0; i < gnum; i++) {
id = groups[i];
ret = sss_mmap_cache_gr_invalidate_gid(&nctx->grp_mc_ctx, id);
if (ret != EOK && ret != ENOENT) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Internal failure in memory cache code: %d [%s]\n",
ret, strerror(ret));
}
}
to_sized_string(delete_name, fq_name);
ret = sss_mmap_cache_initgr_invalidate(&nctx->initgr_mc_ctx,
delete_name);
if (ret != EOK && ret != ENOENT) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Internal failure in memory cache code: %d [%s]\n",
ret, strerror(ret));
}
}
done:
talloc_free(tmp_ctx);
}
static errno_t
sss_nss_memorycache_invalidate_users(TALLOC_CTX *mem_ctx,
struct sbus_request *sbus_req,
struct sss_nss_ctx *nctx)
{
DEBUG(SSSDBG_TRACE_LIBS, "Invalidating all users in memory cache\n");
sss_mmap_cache_reset(nctx->pwd_mc_ctx);
return EOK;
}
static errno_t
sss_nss_memorycache_invalidate_groups(TALLOC_CTX *mem_ctx,
struct sbus_request *sbus_req,
struct sss_nss_ctx *nctx)
{
DEBUG(SSSDBG_TRACE_LIBS, "Invalidating all groups in memory cache\n");
sss_mmap_cache_reset(nctx->grp_mc_ctx);
return EOK;
}
static errno_t
sss_nss_memorycache_invalidate_initgroups(TALLOC_CTX *mem_ctx,
struct sbus_request *sbus_req,
struct sss_nss_ctx *nctx)
{
DEBUG(SSSDBG_TRACE_LIBS,
"Invalidating all initgroup records in memory cache\n");
sss_mmap_cache_reset(nctx->initgr_mc_ctx);
return EOK;
}
static errno_t
sss_nss_memorycache_update_initgroups(TALLOC_CTX *mem_ctx,
struct sbus_request *sbus_req,
struct sss_nss_ctx *nctx,
const char *user,
const char *domain,
uint32_t *groups)
{
DEBUG(SSSDBG_TRACE_LIBS, "Updating initgroups memory cache of [%s@%s]\n",
user, domain);
sss_nss_update_initgr_memcache(nctx, user, domain,
talloc_array_length(groups), groups);
return EOK;
}
static errno_t
sss_nss_memorycache_invalidate_group_by_id(TALLOC_CTX *mem_ctx,
struct sbus_request *sbus_req,
struct sss_nss_ctx *nctx,
uint32_t gid)
{
DEBUG(SSSDBG_TRACE_LIBS,
"Invalidating group %u from memory cache\n", gid);
sss_mmap_cache_gr_invalidate_gid(&nctx->grp_mc_ctx, gid);
return EOK;
}
errno_t
sss_nss_register_backend_iface(struct sbus_connection *conn,
struct sss_nss_ctx *nss_ctx)
{
errno_t ret;
SBUS_INTERFACE(iface,
sssd_nss_MemoryCache,
SBUS_METHODS(
SBUS_SYNC(METHOD, sssd_nss_MemoryCache, UpdateInitgroups, sss_nss_memorycache_update_initgroups, nss_ctx),
SBUS_SYNC(METHOD, sssd_nss_MemoryCache, InvalidateAllUsers, sss_nss_memorycache_invalidate_users, nss_ctx),
SBUS_SYNC(METHOD, sssd_nss_MemoryCache, InvalidateAllGroups, sss_nss_memorycache_invalidate_groups, nss_ctx),
SBUS_SYNC(METHOD, sssd_nss_MemoryCache, InvalidateAllInitgroups, sss_nss_memorycache_invalidate_initgroups, nss_ctx),
SBUS_SYNC(METHOD, sssd_nss_MemoryCache, InvalidateGroupById, sss_nss_memorycache_invalidate_group_by_id, nss_ctx)
),
SBUS_SIGNALS(SBUS_NO_SIGNALS),
SBUS_PROPERTIES(SBUS_NO_PROPERTIES)
);
ret = sbus_connection_add_path(conn, SSS_BUS_PATH, &iface);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE, "Unable to register service interface"
"[%d]: %s\n", ret, sss_strerror(ret));
}
return ret;
}
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