/* Unix SMB/CIFS implementation. WINS Replication server Copyright (C) Stefan Metzmacher 2005 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 2 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, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "includes.h" #include "librpc/gen_ndr/ndr_winsrepl.h" #include "wrepl_server/wrepl_server.h" #include "nbt_server/wins/winsdb.h" #include "ldb/include/ldb.h" #include "ldb/include/ldb_errors.h" #include "system/time.h" const char *wreplsrv_owner_filter(struct wreplsrv_service *service, TALLOC_CTX *mem_ctx, const char *wins_owner) { if (strcmp(wins_owner, service->wins_db->local_owner) == 0) { return talloc_asprintf(mem_ctx, "(|(winsOwner=%s)(winsOwner=0.0.0.0))", wins_owner); } return talloc_asprintf(mem_ctx, "(&(winsOwner=%s)(!(winsOwner=0.0.0.0)))", wins_owner); } static NTSTATUS wreplsrv_scavenging_owned_records(struct wreplsrv_service *service, TALLOC_CTX *tmp_mem) { NTSTATUS status; struct winsdb_record *rec = NULL; struct ldb_result *res = NULL; const char *owner_filter; const char *filter; uint32_t i; int ret; time_t now = time(NULL); const char *now_timestr; const char *action; const char *old_state; uint32_t modify_flags; BOOL modify_record; BOOL delete_record; BOOL delete_tombstones; struct timeval tombstone_extra_time; now_timestr = ldb_timestring(tmp_mem, now); NT_STATUS_HAVE_NO_MEMORY(now_timestr); owner_filter = wreplsrv_owner_filter(service, tmp_mem, service->wins_db->local_owner); NT_STATUS_HAVE_NO_MEMORY(owner_filter); filter = talloc_asprintf(tmp_mem, "(&%s(objectClass=winsRecord)" "(expireTime<=%s)(!(isStatic=1)))", owner_filter, now_timestr); NT_STATUS_HAVE_NO_MEMORY(filter); ret = ldb_search(service->wins_db->ldb, NULL, LDB_SCOPE_SUBTREE, filter, NULL, &res); if (ret != LDB_SUCCESS) return NT_STATUS_INTERNAL_DB_CORRUPTION; talloc_steal(tmp_mem, res); DEBUG(10,("WINS scavenging: filter '%s' count %d\n", filter, res->count)); tombstone_extra_time = timeval_add(&service->startup_time, service->config.tombstone_extra_timeout, 0); delete_tombstones = timeval_expired(&tombstone_extra_time); for (i=0; i < res->count; i++) { status = winsdb_record(service->wins_db, res->msgs[i], tmp_mem, &rec); NT_STATUS_NOT_OK_RETURN(status); if (rec->is_static) { DEBUG(0,("%s: corrupted record: %s\n", __location__, nbt_name_string(rec, rec->name))); return NT_STATUS_INTERNAL_DB_CORRUPTION; } if (rec->expire_time > now) { DEBUG(0,("%s: corrupted record: %s\n", __location__, nbt_name_string(rec, rec->name))); return NT_STATUS_INTERNAL_DB_CORRUPTION; } modify_flags = 0; modify_record = False; delete_record = False; switch (rec->state) { case WREPL_STATE_ACTIVE: old_state = "active"; rec->state = WREPL_STATE_RELEASED; rec->expire_time= service->config.tombstone_interval + now; modify_flags = 0; modify_record = True; break; case WREPL_STATE_RELEASED: old_state = "released"; rec->state = WREPL_STATE_TOMBSTONE; rec->expire_time= service->config.tombstone_timeout + now; modify_flags = WINSDB_FLAG_ALLOC_VERSION | WINSDB_FLAG_TAKE_OWNERSHIP; modify_record = True; break; case WREPL_STATE_TOMBSTONE: old_state = "tombstone"; if (!delete_tombstones) break; delete_record = True; break; case WREPL_STATE_RESERVED: DEBUG(0,("%s: corrupted record: %s\n", __location__, nbt_name_string(rec, rec->name))); return NT_STATUS_INTERNAL_DB_CORRUPTION; } if (modify_record) { action = "modify"; ret = winsdb_modify(service->wins_db, rec, modify_flags); } else if (delete_record) { action = "delete"; ret = winsdb_delete(service->wins_db, rec); } else { action = "skip"; ret = NBT_RCODE_OK; } if (ret != NBT_RCODE_OK) { DEBUG(1,("WINS scavenging: failed to %s name %s (owned:%s): error:%u\n", action, nbt_name_string(rec, rec->name), old_state, ret)); } else { DEBUG(4,("WINS scavenging: %s name: %s (owned:%s)\n", action, nbt_name_string(rec, rec->name), old_state)); } talloc_free(rec); } return NT_STATUS_OK; } static NTSTATUS wreplsrv_scavenging_replica_non_active_records(struct wreplsrv_service *service, TALLOC_CTX *tmp_mem) { NTSTATUS status; struct winsdb_record *rec = NULL; struct ldb_result *res = NULL; const char *owner_filter; const char *filter; uint32_t i; int ret; time_t now = time(NULL); const char *now_timestr; const char *action; const char *old_state; uint32_t modify_flags; BOOL modify_record; BOOL delete_record; BOOL delete_tombstones; struct timeval tombstone_extra_time; now_timestr = ldb_timestring(tmp_mem, now); NT_STATUS_HAVE_NO_MEMORY(now_timestr); owner_filter = wreplsrv_owner_filter(service, tmp_mem, service->wins_db->local_owner); NT_STATUS_HAVE_NO_MEMORY(owner_filter); filter = talloc_asprintf(tmp_mem, "(&(!%s)(objectClass=winsRecord)" "(!(recordState=%u))(expireTime<=%s)(!(isStatic=1)))", owner_filter, WREPL_STATE_ACTIVE, now_timestr); NT_STATUS_HAVE_NO_MEMORY(filter); ret = ldb_search(service->wins_db->ldb, NULL, LDB_SCOPE_SUBTREE, filter, NULL, &res); if (ret != LDB_SUCCESS) return NT_STATUS_INTERNAL_DB_CORRUPTION; talloc_steal(tmp_mem, res); DEBUG(10,("WINS scavenging: filter '%s' count %d\n", filter, res->count)); tombstone_extra_time = timeval_add(&service->startup_time, service->config.tombstone_extra_timeout, 0); delete_tombstones = timeval_expired(&tombstone_extra_time); for (i=0; i < res->count; i++) { status = winsdb_record(service->wins_db, res->msgs[i], tmp_mem, &rec); NT_STATUS_NOT_OK_RETURN(status); if (rec->is_static) { DEBUG(0,("%s: corrupted record: %s\n", __location__, nbt_name_string(rec, rec->name))); return NT_STATUS_INTERNAL_DB_CORRUPTION; } if (rec->expire_time > now) { DEBUG(0,("%s: corrupted record: %s\n", __location__, nbt_name_string(rec, rec->name))); return NT_STATUS_INTERNAL_DB_CORRUPTION; } modify_flags = 0; modify_record = False; delete_record = False; switch (rec->state) { case WREPL_STATE_ACTIVE: DEBUG(0,("%s: corrupted record: %s\n", __location__, nbt_name_string(rec, rec->name))); return NT_STATUS_INTERNAL_DB_CORRUPTION; case WREPL_STATE_RELEASED: old_state = "released"; rec->state = WREPL_STATE_TOMBSTONE; rec->expire_time= service->config.tombstone_timeout + now; modify_flags = 0; modify_record = True; break; case WREPL_STATE_TOMBSTONE: old_state = "tombstone"; if (!delete_tombstones) break; delete_record = True; break; case WREPL_STATE_RESERVED: DEBUG(0,("%s: corrupted record: %s\n", __location__, nbt_name_string(rec, rec->name))); return NT_STATUS_INTERNAL_DB_CORRUPTION; } if (modify_record) { action = "modify"; ret = winsdb_modify(service->wins_db, rec, modify_flags); } else if (delete_record) { action = "delete"; ret = winsdb_delete(service->wins_db, rec); } else { action = "skip"; ret = NBT_RCODE_OK; } if (ret != NBT_RCODE_OK) { DEBUG(1,("WINS scavenging: failed to %s name %s (replica:%s): error:%u\n", action, nbt_name_string(rec, rec->name), old_state, ret)); } else { DEBUG(4,("WINS scavenging: %s name: %s (replica:%s)\n", action, nbt_name_string(rec, rec->name), old_state)); } talloc_free(rec); } return NT_STATUS_OK; } static NTSTATUS wreplsrv_scavenging_replica_active_records(struct wreplsrv_service *service, TALLOC_CTX *tmp_mem) { NTSTATUS status; struct winsdb_record *rec = NULL; struct ldb_result *res = NULL; const char *owner_filter; const char *filter; uint32_t i; int ret; time_t now = time(NULL); const char *now_timestr; const char *action; const char *old_state; BOOL modify_flags; BOOL modify_record; BOOL delete_record; now_timestr = ldb_timestring(tmp_mem, now); NT_STATUS_HAVE_NO_MEMORY(now_timestr); owner_filter = wreplsrv_owner_filter(service, tmp_mem, service->wins_db->local_owner); NT_STATUS_HAVE_NO_MEMORY(owner_filter); filter = talloc_asprintf(tmp_mem, "(&(!%s)(objectClass=winsRecord)" "(recordState=%u)(expireTime<=%s)(!(isStatic=1)))", owner_filter, WREPL_STATE_ACTIVE, now_timestr); NT_STATUS_HAVE_NO_MEMORY(filter); ret = ldb_search(service->wins_db->ldb, NULL, LDB_SCOPE_SUBTREE, filter, NULL, &res); if (ret != LDB_SUCCESS) return NT_STATUS_INTERNAL_DB_CORRUPTION; talloc_steal(tmp_mem, res); DEBUG(10,("WINS scavenging: filter '%s' count %d\n", filter, res->count)); for (i=0; i < res->count; i++) { status = winsdb_record(service->wins_db, res->msgs[i], tmp_mem, &rec); NT_STATUS_NOT_OK_RETURN(status); if (rec->is_static) { DEBUG(0,("%s: corrupted record: %s\n", __location__, nbt_name_string(rec, rec->name))); return NT_STATUS_INTERNAL_DB_CORRUPTION; } if (rec->expire_time > now) { DEBUG(0,("%s: corrupted record: %s\n", __location__, nbt_name_string(rec, rec->name))); return NT_STATUS_INTERNAL_DB_CORRUPTION; } if (rec->state != WREPL_STATE_ACTIVE) { DEBUG(0,("%s: corrupted record: %s\n", __location__, nbt_name_string(rec, rec->name))); return NT_STATUS_INTERNAL_DB_CORRUPTION; } old_state = "active"; modify_flags = 0; modify_record = False; delete_record = False; /* * TODO: ask the owning wins server if the record still exists, * if not delete the record */ DEBUG(0,("TODO: ask wins server '%s' if '%s' with version_id:%llu still exists\n", rec->wins_owner, nbt_name_string(rec, rec->name), rec->version)); if (modify_record) { action = "modify"; ret = winsdb_modify(service->wins_db, rec, modify_flags); } else if (delete_record) { action = "delete"; ret = winsdb_delete(service->wins_db, rec); } else { action = "skip"; ret = NBT_RCODE_OK; } if (ret != NBT_RCODE_OK) { DEBUG(1,("WINS scavenging: failed to %s name %s (replica:%s): error:%u\n", action, nbt_name_string(rec, rec->name), old_state, ret)); } else { DEBUG(4,("WINS scavenging: %s name: %s (replica:%s)\n", action, nbt_name_string(rec, rec->name), old_state)); } talloc_free(rec); } return NT_STATUS_OK; } NTSTATUS wreplsrv_scavenging_run(struct wreplsrv_service *service) { NTSTATUS status; TALLOC_CTX *tmp_mem; BOOL skip_first_run = False; if (!timeval_expired(&service->scavenging.next_run)) { return NT_STATUS_OK; } if (timeval_is_zero(&service->scavenging.next_run)) { skip_first_run = True; } service->scavenging.next_run = timeval_current_ofs(service->config.scavenging_interval, 0); status = wreplsrv_periodic_schedule(service, service->config.scavenging_interval); NT_STATUS_NOT_OK_RETURN(status); /* * if it's the first time this functions is called (startup) * the next_run is zero, in this case we should not do scavenging */ if (skip_first_run) { return NT_STATUS_OK; } if (service->scavenging.processing) { return NT_STATUS_OK; } DEBUG(4,("wreplsrv_scavenging_run(): start\n")); tmp_mem = talloc_new(service); service->scavenging.processing = True; status = wreplsrv_scavenging_owned_records(service,tmp_mem); service->scavenging.processing = False; talloc_free(tmp_mem); NT_STATUS_NOT_OK_RETURN(status); tmp_mem = talloc_new(service); service->scavenging.processing = True; status = wreplsrv_scavenging_replica_non_active_records(service, tmp_mem); service->scavenging.processing = False; talloc_free(tmp_mem); NT_STATUS_NOT_OK_RETURN(status); tmp_mem = talloc_new(service); service->scavenging.processing = True; status = wreplsrv_scavenging_replica_active_records(service, tmp_mem); service->scavenging.processing = False; talloc_free(tmp_mem); NT_STATUS_NOT_OK_RETURN(status); DEBUG(4,("wreplsrv_scavenging_run(): end\n")); return NT_STATUS_OK; }