/*
Unix SMB/CIFS implementation.
- Winbind background daemon
+ Winbind child daemons
Copyright (C) Andrew Tridgell 2002
Copyright (C) Volker Lendecke 2004,2005
*/
/*
- the idea of the optional dual daemon mode is ot prevent slow domain
- responses from clagging up the rest of the system. When in dual
- daemon mode winbindd always responds to requests from cache if the
- request is in cache, and if the cached answer is stale then it asks
- the "dual daemon" to update the cache for that request
-
+ * We fork a child per domain to be able to act non-blocking in the main
+ * winbind daemon. A domain controller thousands of miles away being being
+ * slow replying with a 10.000 user list should not hold up netlogon calls
+ * that can be handled locally.
*/
#include "includes.h"
/* Read some data from a client connection */
-static void dual_client_read(struct winbindd_cli_state *state)
+static void child_read_request(struct winbindd_cli_state *state)
{
- int n;
-
+ ssize_t len;
+
/* Read data */
- n = sys_read(state->sock, state->read_buf_len +
- (char *)&state->request,
- sizeof(state->request) - state->read_buf_len);
-
- DEBUG(10,("client_read: read %d bytes. Need %ld more for a full "
- "request.\n", n, (unsigned long)(sizeof(state->request) - n -
- state->read_buf_len) ));
+ len = read_data(state->sock, (char *)&state->request,
+ sizeof(state->request));
- /* Read failed, kill client */
-
- if (n == -1 || n == 0) {
- DEBUG(5,("read failed on sock %d, pid %lu: %s\n",
- state->sock, (unsigned long)state->pid,
- (n == -1) ? strerror(errno) : "EOF"));
-
+ if (len != sizeof(state->request)) {
+ DEBUG(0, ("Got invalid request length: %d\n", (int)len));
+ state->finished = True;
+ return;
+ }
+
+ if (state->request.extra_len == 0) {
+ state->request.extra_data.data = NULL;
+ return;
+ }
+
+ DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request.extra_len));
+
+ state->request.extra_data.data =
+ SMB_MALLOC_ARRAY(char, state->request.extra_len + 1);
+
+ if (state->request.extra_data.data == NULL) {
+ DEBUG(0, ("malloc failed\n"));
+ state->finished = True;
+ return;
+ }
+
+ /* Ensure null termination */
+ state->request.extra_data.data[state->request.extra_len] = '\0';
+
+ len = read_data(state->sock, state->request.extra_data.data,
+ state->request.extra_len);
+
+ if (len != state->request.extra_len) {
+ DEBUG(0, ("Could not read extra data\n"));
state->finished = True;
return;
}
-
- /* Update client state */
-
- state->read_buf_len += n;
- state->last_access = time(NULL);
}
/*
void *private_data;
};
+static void async_main_request_sent(void *private_data, BOOL success);
static void async_request_sent(void *private_data, BOOL success);
static void async_reply_recv(void *private_data, BOOL success);
static void schedule_async_request(struct winbindd_child *child);
return;
}
-static void async_request_sent(void *private_data, BOOL success)
+static void async_main_request_sent(void *private_data, BOOL success)
{
struct winbindd_async_request *state =
talloc_get_type_abort(private_data, struct winbindd_async_request);
return;
}
+ if (state->request->extra_len == 0) {
+ async_request_sent(private_data, True);
+ return;
+ }
+
+ setup_async_write(&state->child->event, state->request->extra_data.data,
+ state->request->extra_len,
+ async_request_sent, state);
+}
+
+static void async_request_sent(void *private_data_data, BOOL success)
+{
+ struct winbindd_async_request *state =
+ talloc_get_type_abort(private_data_data, struct winbindd_async_request);
+
+ if (!success) {
+ DEBUG(5, ("Could not send async request\n"));
+
+ state->response->length = sizeof(struct winbindd_response);
+ state->response->result = WINBINDD_ERROR;
+ state->continuation(state->private_data, False);
+ return;
+ }
+
/* Request successfully sent to the child, setup the wait for reply */
setup_async_read(&state->child->event,
SMB_ASSERT(cache_retrieve_response(child->pid,
state->response));
+ cache_cleanup_response(child->pid);
+
DLIST_REMOVE(child->requests, state);
schedule_async_request(child);
setup_async_write(&child->event, request->request,
sizeof(*request->request),
- async_request_sent, request);
+ async_main_request_sent, request);
+
+ talloc_destroy(child->mem_ctx);
return;
}
struct winbindd_domain *domain;
struct winbindd_request *request;
struct winbindd_response *response;
- void (*continuation)(void *private_data, BOOL success);
- void *private_data;
+ void (*continuation)(void *private_data_data, BOOL success);
+ void *private_data_data;
};
-static void domain_init_recv(void *private_data, BOOL success);
+static void domain_init_recv(void *private_data_data, BOOL success);
void async_domain_request(TALLOC_CTX *mem_ctx,
struct winbindd_domain *domain,
struct winbindd_request *request,
struct winbindd_response *response,
- void (*continuation)(void *private_data, BOOL success),
- void *private_data)
+ void (*continuation)(void *private_data_data, BOOL success),
+ void *private_data_data)
{
struct domain_request_state *state;
if (domain->initialized) {
async_request(mem_ctx, &domain->child, request, response,
- continuation, private_data);
+ continuation, private_data_data);
return;
}
state = TALLOC_P(mem_ctx, struct domain_request_state);
if (state == NULL) {
DEBUG(0, ("talloc failed\n"));
- continuation(private_data, False);
+ continuation(private_data_data, False);
return;
}
state->request = request;
state->response = response;
state->continuation = continuation;
- state->private_data = private_data;
+ state->private_data_data = private_data_data;
init_child_connection(domain, domain_init_recv, state);
}
-static void recvfrom_child(void *private_data, BOOL success)
+static void recvfrom_child(void *private_data_data, BOOL success)
{
struct winbindd_cli_state *state =
- talloc_get_type_abort(private_data, struct winbindd_cli_state);
+ talloc_get_type_abort(private_data_data, struct winbindd_cli_state);
enum winbindd_result result = state->response.result;
/* This is an optimization: The child has written directly to the
recvfrom_child, state);
}
-static void domain_init_recv(void *private_data, BOOL success)
+static void domain_init_recv(void *private_data_data, BOOL success)
{
struct domain_request_state *state =
- talloc_get_type_abort(private_data, struct domain_request_state);
+ talloc_get_type_abort(private_data_data, struct domain_request_state);
if (!success) {
DEBUG(5, ("Domain init returned an error\n"));
- state->continuation(state->private_data, False);
+ state->continuation(state->private_data_data, False);
return;
}
async_request(state->mem_ctx, &state->domain->child,
state->request, state->response,
- state->continuation, state->private_data);
+ state->continuation, state->private_data_data);
}
struct winbindd_child_dispatch_table {
{ WINBINDD_SHOW_SEQUENCE, winbindd_dual_show_sequence, "SHOW_SEQUENCE" },
{ WINBINDD_PAM_AUTH, winbindd_dual_pam_auth, "PAM_AUTH" },
{ WINBINDD_PAM_AUTH_CRAP, winbindd_dual_pam_auth_crap, "AUTH_CRAP" },
+ { WINBINDD_PAM_LOGOFF, winbindd_dual_pam_logoff, "PAM_LOGOFF" },
{ WINBINDD_CHECK_MACHACC, winbindd_dual_check_machine_acct, "CHECK_MACHACC" },
{ WINBINDD_DUAL_SID2UID, winbindd_dual_sid2uid, "DUAL_SID2UID" },
{ WINBINDD_DUAL_SID2GID, winbindd_dual_sid2gid, "DUAL_SID2GID" },
{ WINBINDD_DUAL_NAME2GID, winbindd_dual_name2gid, "DUAL_NAME2GID" },
{ WINBINDD_DUAL_IDMAPSET, winbindd_dual_idmapset, "DUAL_IDMAPSET" },
{ WINBINDD_DUAL_USERINFO, winbindd_dual_userinfo, "DUAL_USERINFO" },
- { WINBINDD_ALLOCATE_RID, winbindd_dual_allocate_rid, "ALLOCATE_RID" },
- { WINBINDD_ALLOCATE_RID_AND_GID, winbindd_dual_allocate_rid_and_gid, "ALLOCATE_RID_AND_GID" },
+ { WINBINDD_ALLOCATE_UID, winbindd_dual_allocate_uid, "ALLOCATE_UID" },
+ { WINBINDD_ALLOCATE_GID, winbindd_dual_allocate_gid, "ALLOCATE_GID" },
{ WINBINDD_GETUSERDOMGROUPS, winbindd_dual_getuserdomgroups, "GETUSERDOMGROUPS" },
{ WINBINDD_DUAL_GETSIDALIASES, winbindd_dual_getsidaliases, "GETSIDALIASES" },
/* End of list */
schedule_async_request(child);
}
+/* Forward the online/offline messages to our children. */
+void winbind_msg_offline(int msg_type, struct process_id src, void *buf, size_t len)
+{
+ struct winbindd_child *child;
+
+ DEBUG(10,("winbind_msg_offline: got offline message.\n"));
+
+ if (!lp_winbind_offline_logon()) {
+ DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
+ return;
+ }
+
+ /* Set our global state as offline. */
+ if (!set_global_winbindd_state_offline()) {
+ DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
+ return;
+ }
+
+ for (child = children; child != NULL; child = child->next) {
+ DEBUG(10,("winbind_msg_offline: sending message to pid %u.\n",
+ (unsigned int)child->pid ));
+ message_send_pid(pid_to_procid(child->pid), MSG_WINBIND_OFFLINE, NULL, 0, False);
+ }
+}
+
+/* Forward the online/offline messages to our children. */
+void winbind_msg_online(int msg_type, struct process_id src, void *buf, size_t len)
+{
+ struct winbindd_child *child;
+
+ DEBUG(10,("winbind_msg_online: got online message.\n"));
+
+ if (!lp_winbind_offline_logon()) {
+ DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
+ return;
+ }
+
+ /* Set our global state as online. */
+ set_global_winbindd_state_online();
+
+ for (child = children; child != NULL; child = child->next) {
+ DEBUG(10,("winbind_msg_online: sending message to pid %u.\n",
+ (unsigned int)child->pid ));
+ message_send_pid(pid_to_procid(child->pid), MSG_WINBIND_ONLINE, NULL, 0, False);
+ }
+}
+
+static void account_lockout_policy_handler(struct timed_event *te,
+ const struct timeval *now,
+ void *private_data)
+{
+ struct winbindd_child *child = private_data;
+
+ struct winbindd_methods *methods;
+ SAM_UNK_INFO_12 lockout_policy;
+ NTSTATUS result;
+
+ DEBUG(10,("account_lockout_policy_handler called\n"));
+
+ if (child->lockout_policy_event) {
+ TALLOC_FREE(child->lockout_policy_event);
+ }
+
+ methods = child->domain->methods;
+
+ result = methods->lockout_policy(child->domain, child->mem_ctx, &lockout_policy);
+ if (!NT_STATUS_IS_OK(result)) {
+ DEBUG(10,("account_lockout_policy_handler: failed to call lockout_policy\n"));
+ return;
+ }
+
+ child->lockout_policy_event = add_timed_event(child->mem_ctx,
+ timeval_current_ofs(3600, 0),
+ "account_lockout_policy_handler",
+ account_lockout_policy_handler,
+ child);
+}
+
+/* Deal with a request to go offline. */
+
+static void child_msg_offline(int msg_type, struct process_id src, void *buf, size_t len)
+{
+ struct winbindd_domain *domain;
+
+ DEBUG(5,("child_msg_offline received.\n"));
+
+ if (!lp_winbind_offline_logon()) {
+ DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
+ return;
+ }
+
+ /* Set our global state as offline. */
+ if (!set_global_winbindd_state_offline()) {
+ DEBUG(10,("child_msg_offline: offline request failed.\n"));
+ return;
+ }
+
+ /* Mark all our domains as offline. */
+
+ for (domain = domain_list(); domain; domain = domain->next) {
+ DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
+ domain->online = False;
+ }
+}
+
+/* Deal with a request to go online. */
+
+static void child_msg_online(int msg_type, struct process_id src, void *buf, size_t len)
+{
+ struct winbindd_domain *domain;
+
+ DEBUG(5,("child_msg_online received.\n"));
+
+ if (!lp_winbind_offline_logon()) {
+ DEBUG(10,("child_msg_online: rejecting online message.\n"));
+ return;
+ }
+
+ /* Set our global state as online. */
+ set_global_winbindd_state_online();
+
+ winbindd_flush_nscd_cache();
+
+ /* Mark everything online - delete any negative cache entries
+ to force an immediate reconnect. */
+
+ for (domain = domain_list(); domain; domain = domain->next) {
+ DEBUG(5,("child_msg_online: marking %s online.\n", domain->name));
+ domain->online = True;
+ check_negative_conn_cache_timeout(domain->name, domain->dcname, 0);
+ }
+}
+
static BOOL fork_domain_child(struct winbindd_child *child)
{
int fdpair[2];
ZERO_STRUCT(state);
state.pid = getpid();
+ /* Ensure we don't process messages whilst we're
+ changing the disposition for the child. */
+ message_block();
+
child->pid = sys_fork();
if (child->pid == -1) {
DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
+ message_unblock();
return False;
}
child->event.flags = 0;
child->requests = NULL;
add_fd_event(&child->event);
+ /* We're ok with online/offline messages now. */
+ message_unblock();
return True;
}
close(fdpair[1]);
/* tdb needs special fork handling */
- if (tdb_reopen_all() == -1) {
+ if (tdb_reopen_all(1) == -1) {
DEBUG(0,("tdb_reopen_all failed.\n"));
_exit(0);
}
lp_set_logfile(child->logfilename);
reopen_logs();
}
-
+
+ /* Don't handle the same messages as our parent. */
+ message_deregister(MSG_SMB_CONF_UPDATED);
+ message_deregister(MSG_SHUTDOWN);
+ message_deregister(MSG_WINBIND_OFFLINE);
+ message_deregister(MSG_WINBIND_ONLINE);
+
+ /* The child is ok with online/offline messages now. */
+ message_unblock();
+
+ child->mem_ctx = talloc_init("child_mem_ctx");
+ if (child->mem_ctx == NULL) {
+ return False;
+ }
+
+ if (child->domain != NULL) {
+ /* We might be in the idmap child...*/
+ child->lockout_policy_event = add_timed_event(
+ child->mem_ctx, timeval_zero(),
+ "account_lockout_policy_handler",
+ account_lockout_policy_handler,
+ child);
+ }
+
+ /* Handle online/offline messages. */
+ message_register(MSG_WINBIND_OFFLINE,child_msg_offline);
+ message_register(MSG_WINBIND_ONLINE,child_msg_online);
+
while (1) {
+
+ int ret;
+ fd_set read_fds;
+ struct timeval t;
+ struct timeval *tp;
+ struct timeval now;
+
/* free up any talloc memory */
- lp_talloc_free();
- main_loop_talloc_free();
+ lp_TALLOC_FREE();
+ main_loop_TALLOC_FREE();
+
+ run_events();
+
+ GetTimeOfDay(&now);
+
+ tp = get_timed_events_timeout(&t, (time_t)-1);
+ if (tp) {
+ DEBUG(11,("select will use timeout of %d seconds\n", (int)tp->tv_sec));
+ }
+
+ /* Handle messages */
+
+ message_dispatch();
+
+ FD_ZERO(&read_fds);
+ FD_SET(state.sock, &read_fds);
+
+ ret = sys_select(state.sock + 1, &read_fds, NULL, NULL, tp);
+
+ if (ret == 0) {
+ DEBUG(11,("nothing is ready yet, continue\n"));
+ continue;
+ }
+
+ if (ret == -1 && errno == EINTR) {
+ /* We got a signal - continue. */
+ continue;
+ }
+
+ if (ret == -1 && errno != EINTR) {
+ DEBUG(0,("select error occured\n"));
+ perror("select");
+ return False;
+ }
/* fetch a request from the main daemon */
- dual_client_read(&state);
+ child_read_request(&state);
if (state.finished) {
/* we lost contact with our parent */
exit(0);
}
- /* process full rquests */
- if (state.read_buf_len == sizeof(state.request)) {
- DEBUG(4,("child daemon request %d\n",
- (int)state.request.cmd));
+ DEBUG(4,("child daemon request %d\n", (int)state.request.cmd));
- ZERO_STRUCT(state.response);
- state.request.null_term = '\0';
- child_process_request(child->domain, &state);
+ ZERO_STRUCT(state.response);
+ state.request.null_term = '\0';
+ child_process_request(child->domain, &state);
- cache_store_response(sys_getpid(), &state.response);
+ SAFE_FREE(state.request.extra_data.data);
- SAFE_FREE(state.response.extra_data);
+ cache_store_response(sys_getpid(), &state.response);
- /* We just send the result code back, the result
- * structure needs to be fetched via the
- * winbindd_cache. Hmm. That needs fixing... */
+ SAFE_FREE(state.response.extra_data.data);
- if (write_data(state.sock,
- (void *)&state.response.result,
- sizeof(state.response.result)) !=
- sizeof(state.response.result)) {
- DEBUG(0, ("Could not write result\n"));
- exit(1);
- }
+ /* We just send the result code back, the result
+ * structure needs to be fetched via the
+ * winbindd_cache. Hmm. That needs fixing... */
- state.read_buf_len = 0;
+ if (write_data(state.sock, (void *)&state.response.result,
+ sizeof(state.response.result)) !=
+ sizeof(state.response.result)) {
+ DEBUG(0, ("Could not write result\n"));
+ exit(1);
}
}
}
git.samba.org / kai / samba-autobuild / .git / blobdiff