/*
Unix SMB/CIFS implementation.
- Winbind background daemon
+ Winbind child daemons
Copyright (C) Andrew Tridgell 2002
+ Copyright (C) Volker Lendecke 2004,2005
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 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"
#include "winbindd.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND
-extern BOOL opt_dual_daemon;
-BOOL background_process = False;
-int dual_daemon_pipe = -1;
+extern BOOL override_logfile;
+/* Read some data from a client connection */
-/* a list of requests ready to be sent to the dual daemon */
-struct dual_list {
- struct dual_list *next;
- char *data;
- int length;
- int offset;
-};
+static void child_read_request(struct winbindd_cli_state *state)
+{
+ ssize_t len;
+
+ /* Read data */
+
+ len = read_data(state->sock, (char *)&state->request,
+ sizeof(state->request));
+
+ if (len != sizeof(state->request)) {
+ DEBUG(len > 0 ? 0 : 3, ("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));
-static struct dual_list *dual_list;
-static struct dual_list *dual_list_end;
+ 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;
+ }
+}
/*
- setup a select() including the dual daemon pipe
+ * Machinery for async requests sent to children. You set up a
+ * winbindd_request, select a child to query, and issue a async_request
+ * call. When the request is completed, the callback function you specified is
+ * called back with the private pointer you gave to async_request.
*/
-int dual_select_setup(fd_set *fds, int maxfd)
+
+struct winbindd_async_request {
+ struct winbindd_async_request *next, *prev;
+ TALLOC_CTX *mem_ctx;
+ struct winbindd_child *child;
+ struct winbindd_request *request;
+ struct winbindd_response *response;
+ void (*continuation)(void *private_data, BOOL success);
+ struct timed_event *reply_timeout_event;
+ pid_t child_pid; /* pid of the child we're waiting on. Used to detect
+ a restart of the child (child->pid != child_pid). */
+ 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);
+
+void async_request(TALLOC_CTX *mem_ctx, struct winbindd_child *child,
+ struct winbindd_request *request,
+ struct winbindd_response *response,
+ void (*continuation)(void *private_data, BOOL success),
+ void *private_data)
+{
+ struct winbindd_async_request *state;
+
+ SMB_ASSERT(continuation != NULL);
+
+ state = TALLOC_P(mem_ctx, struct winbindd_async_request);
+
+ if (state == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ continuation(private_data, False);
+ return;
+ }
+
+ state->mem_ctx = mem_ctx;
+ state->child = child;
+ state->request = request;
+ state->response = response;
+ state->continuation = continuation;
+ state->private_data = private_data;
+
+ DLIST_ADD_END(child->requests, state, struct winbindd_async_request *);
+
+ schedule_async_request(child);
+
+ return;
+}
+
+static void async_main_request_sent(void *private_data, BOOL success)
{
- if (dual_daemon_pipe == -1 ||
- !dual_list) {
- return maxfd;
+ struct winbindd_async_request *state =
+ talloc_get_type_abort(private_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;
}
- FD_SET(dual_daemon_pipe, fds);
- if (dual_daemon_pipe > maxfd) {
- maxfd = dual_daemon_pipe;
+ if (state->request->extra_len == 0) {
+ async_request_sent(private_data, True);
+ return;
}
- return maxfd;
+
+ setup_async_write(&state->child->event, state->request->extra_data.data,
+ state->request->extra_len,
+ async_request_sent, state);
}
+/****************************************************************
+ Handler triggered if the child winbindd doesn't respond within
+ a given timeout.
+****************************************************************/
-/*
- a hook called from the main winbindd select() loop to handle writes
- to the dual daemon pipe
-*/
-void dual_select(fd_set *fds)
+static void async_request_timeout_handler(struct event_context *ctx,
+ struct timed_event *te,
+ const struct timeval *now,
+ void *private_data)
+{
+ struct winbindd_async_request *state =
+ talloc_get_type_abort(private_data, struct winbindd_async_request);
+
+ DEBUG(0,("async_request_timeout_handler: child pid %u is not responding. "
+ "Closing connection to it.\n",
+ state->child_pid ));
+
+ /* Deal with the reply - set to error. */
+ async_reply_recv(private_data, False);
+}
+
+/**************************************************************
+ Common function called on both async send and recv fail.
+ Cleans up the child and schedules the next request.
+**************************************************************/
+
+static void async_request_fail(struct winbindd_async_request *state)
{
- int n;
+ DLIST_REMOVE(state->child->requests, state);
+
+ TALLOC_FREE(state->reply_timeout_event);
+
+ SMB_ASSERT(state->child_pid != (pid_t)0);
+
+ /* If not already reaped, send kill signal to child. */
+ if (state->child->pid == state->child_pid) {
+ kill(state->child_pid, SIGTERM);
+
+ /*
+ * Close the socket to the child.
+ */
+ winbind_child_died(state->child_pid);
+ }
+
+ state->response->length = sizeof(struct winbindd_response);
+ state->response->result = WINBINDD_ERROR;
+ state->continuation(state->private_data, False);
+}
- if (dual_daemon_pipe == -1 ||
- !dual_list ||
- !FD_ISSET(dual_daemon_pipe, fds)) {
+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 to child pid %u\n",
+ (unsigned int)state->child_pid ));
+ async_request_fail(state);
return;
}
- n = sys_write(dual_daemon_pipe,
- &dual_list->data[dual_list->offset],
- dual_list->length - dual_list->offset);
+ /* Request successfully sent to the child, setup the wait for reply */
+
+ setup_async_read(&state->child->event,
+ &state->response->result,
+ sizeof(state->response->result),
+ async_reply_recv, state);
+
+ /*
+ * Set up a timeout of 300 seconds for the response.
+ * If we don't get it close the child socket and
+ * report failure.
+ */
+
+ state->reply_timeout_event = event_add_timed(winbind_event_context(),
+ NULL,
+ timeval_current_ofs(300,0),
+ "async_request_timeout",
+ async_request_timeout_handler,
+ state);
+ if (!state->reply_timeout_event) {
+ smb_panic("async_request_sent: failed to add timeout handler.\n");
+ }
+}
+
+static void async_reply_recv(void *private_data, BOOL success)
+{
+ struct winbindd_async_request *state =
+ talloc_get_type_abort(private_data, struct winbindd_async_request);
+ struct winbindd_child *child = state->child;
+
+ TALLOC_FREE(state->reply_timeout_event);
+
+ state->response->length = sizeof(struct winbindd_response);
- if (n <= 0) {
- /* the pipe is dead! fall back to normal operation */
- dual_daemon_pipe = -1;
+ if (!success) {
+ DEBUG(5, ("Could not receive async reply from child pid %u\n",
+ (unsigned int)state->child_pid ));
+
+ cache_cleanup_response(state->child_pid);
+ async_request_fail(state);
+ return;
+ }
+
+ SMB_ASSERT(cache_retrieve_response(state->child_pid,
+ state->response));
+
+ cache_cleanup_response(state->child_pid);
+
+ DLIST_REMOVE(child->requests, state);
+
+ schedule_async_request(child);
+
+ state->continuation(state->private_data, True);
+}
+
+static BOOL fork_domain_child(struct winbindd_child *child);
+
+static void schedule_async_request(struct winbindd_child *child)
+{
+ struct winbindd_async_request *request = child->requests;
+
+ if (request == NULL) {
return;
}
- dual_list->offset += n;
+ if (child->event.flags != 0) {
+ return; /* Busy */
+ }
+
+ if ((child->pid == 0) && (!fork_domain_child(child))) {
+ /* Cancel all outstanding requests */
- if (dual_list->offset == dual_list->length) {
- struct dual_list *next;
- next = dual_list->next;
- free(dual_list->data);
- free(dual_list);
- dual_list = next;
- if (!dual_list) {
- dual_list_end = NULL;
+ while (request != NULL) {
+ /* request might be free'd in the continuation */
+ struct winbindd_async_request *next = request->next;
+ request->continuation(request->private_data, False);
+ request = next;
}
+ return;
}
+
+ /* Now we know who we're sending to - remember the pid. */
+ request->child_pid = child->pid;
+
+ setup_async_write(&child->event, request->request,
+ sizeof(*request->request),
+ async_main_request_sent, request);
+
+ return;
}
-/*
- send a request to the background daemon
- this is called for stale cached entries
-*/
-void dual_send_request(struct winbindd_cli_state *state)
+struct domain_request_state {
+ TALLOC_CTX *mem_ctx;
+ struct winbindd_domain *domain;
+ struct winbindd_request *request;
+ struct winbindd_response *response;
+ void (*continuation)(void *private_data_data, BOOL success);
+ void *private_data_data;
+};
+
+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_data, BOOL success),
+ void *private_data_data)
{
- struct dual_list *list;
+ struct domain_request_state *state;
+
+ if (domain->initialized) {
+ async_request(mem_ctx, &domain->child, request, response,
+ 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_data, False);
+ return;
+ }
+
+ state->mem_ctx = mem_ctx;
+ state->domain = domain;
+ state->request = request;
+ state->response = response;
+ state->continuation = continuation;
+ state->private_data_data = private_data_data;
- if (!background_process) return;
+ init_child_connection(domain, domain_init_recv, state);
+}
+
+static void recvfrom_child(void *private_data_data, BOOL success)
+{
+ struct winbindd_cli_state *state =
+ talloc_get_type_abort(private_data_data, struct winbindd_cli_state);
+ enum winbindd_result result = state->response.result;
- list = malloc(sizeof(*list));
- if (!list) return;
+ /* This is an optimization: The child has written directly to the
+ * response buffer. The request itself is still in pending state,
+ * state that in the result code. */
- list->next = NULL;
- list->data = memdup(&state->request, sizeof(state->request));
- list->length = sizeof(state->request);
- list->offset = 0;
+ state->response.result = WINBINDD_PENDING;
+
+ if ((!success) || (result != WINBINDD_OK)) {
+ request_error(state);
+ return;
+ }
+
+ request_ok(state);
+}
+
+void sendto_child(struct winbindd_cli_state *state,
+ struct winbindd_child *child)
+{
+ async_request(state->mem_ctx, child, &state->request,
+ &state->response, recvfrom_child, state);
+}
+
+void sendto_domain(struct winbindd_cli_state *state,
+ struct winbindd_domain *domain)
+{
+ async_domain_request(state->mem_ctx, domain,
+ &state->request, &state->response,
+ recvfrom_child, state);
+}
+
+static void domain_init_recv(void *private_data_data, BOOL success)
+{
+ struct domain_request_state *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_data, False);
+ return;
+ }
+
+ async_request(state->mem_ctx, &state->domain->child,
+ state->request, state->response,
+ state->continuation, state->private_data_data);
+}
+
+struct winbindd_child_dispatch_table {
+ enum winbindd_cmd cmd;
+ enum winbindd_result (*fn)(struct winbindd_domain *domain,
+ struct winbindd_cli_state *state);
+ const char *winbindd_cmd_name;
+};
+
+static struct winbindd_child_dispatch_table child_dispatch_table[] = {
- if (!dual_list_end) {
- dual_list = list;
- dual_list_end = list;
+ { WINBINDD_LOOKUPSID, winbindd_dual_lookupsid, "LOOKUPSID" },
+ { WINBINDD_LOOKUPNAME, winbindd_dual_lookupname, "LOOKUPNAME" },
+ { WINBINDD_LOOKUPRIDS, winbindd_dual_lookuprids, "LOOKUPRIDS" },
+ { WINBINDD_LIST_TRUSTDOM, winbindd_dual_list_trusted_domains, "LIST_TRUSTDOM" },
+ { WINBINDD_INIT_CONNECTION, winbindd_dual_init_connection, "INIT_CONNECTION" },
+ { WINBINDD_GETDCNAME, winbindd_dual_getdcname, "GETDCNAME" },
+ { 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_PAM_CHNG_PSWD_AUTH_CRAP,winbindd_dual_pam_chng_pswd_auth_crap,"CHNG_PSWD_AUTH_CRAP" },
+ { WINBINDD_PAM_CHAUTHTOK, winbindd_dual_pam_chauthtok, "PAM_CHAUTHTOK" },
+ { 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" },
+#if 0 /* DISABLED until we fix the interface in Samba 3.0.26 --jerry */
+ { WINBINDD_DUAL_SIDS2XIDS, winbindd_dual_sids2xids, "DUAL_SIDS2XIDS" },
+#endif /* end DISABLED */
+ { WINBINDD_DUAL_UID2SID, winbindd_dual_uid2sid, "DUAL_UID2SID" },
+ { WINBINDD_DUAL_GID2SID, winbindd_dual_gid2sid, "DUAL_GID2SID" },
+ { WINBINDD_DUAL_UID2NAME, winbindd_dual_uid2name, "DUAL_UID2NAME" },
+ { WINBINDD_DUAL_NAME2UID, winbindd_dual_name2uid, "DUAL_NAME2UID" },
+ { WINBINDD_DUAL_GID2NAME, winbindd_dual_gid2name, "DUAL_GID2NAME" },
+ { WINBINDD_DUAL_NAME2GID, winbindd_dual_name2gid, "DUAL_NAME2GID" },
+ { WINBINDD_DUAL_SET_MAPPING, winbindd_dual_set_mapping, "DUAL_SET_MAPPING" },
+ { WINBINDD_DUAL_SET_HWM, winbindd_dual_set_hwm, "DUAL_SET_HWMS" },
+ { WINBINDD_DUAL_DUMP_MAPS, winbindd_dual_dump_maps, "DUAL_DUMP_MAPS" },
+ { WINBINDD_DUAL_USERINFO, winbindd_dual_userinfo, "DUAL_USERINFO" },
+ { 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" },
+ { WINBINDD_CCACHE_NTLMAUTH, winbindd_dual_ccache_ntlm_auth, "CCACHE_NTLM_AUTH" },
+ /* End of list */
+
+ { WINBINDD_NUM_CMDS, NULL, "NONE" }
+};
+
+static void child_process_request(struct winbindd_domain *domain,
+ struct winbindd_cli_state *state)
+{
+ struct winbindd_child_dispatch_table *table;
+
+ /* Free response data - we may be interrupted and receive another
+ command before being able to send this data off. */
+
+ state->response.result = WINBINDD_ERROR;
+ state->response.length = sizeof(struct winbindd_response);
+
+ state->mem_ctx = talloc_init("winbind request");
+ if (state->mem_ctx == NULL)
+ return;
+
+ /* Process command */
+
+ for (table = child_dispatch_table; table->fn; table++) {
+ if (state->request.cmd == table->cmd) {
+ DEBUG(10,("process_request: request fn %s\n",
+ table->winbindd_cmd_name ));
+ state->response.result = table->fn(domain, state);
+ break;
+ }
+ }
+
+ if (!table->fn) {
+ DEBUG(10,("process_request: unknown request fn number %d\n",
+ (int)state->request.cmd ));
+ state->response.result = WINBINDD_ERROR;
+ }
+
+ talloc_destroy(state->mem_ctx);
+}
+
+void setup_domain_child(struct winbindd_domain *domain,
+ struct winbindd_child *child,
+ const char *explicit_logfile)
+{
+ if (explicit_logfile != NULL) {
+ pstr_sprintf(child->logfilename, "%s/log.winbindd-%s",
+ dyn_LOGFILEBASE, explicit_logfile);
+ } else if (domain != NULL) {
+ pstr_sprintf(child->logfilename, "%s/log.wb-%s",
+ dyn_LOGFILEBASE, domain->name);
} else {
- dual_list_end->next = list;
- dual_list_end = list;
+ smb_panic("Internal error: domain == NULL && "
+ "explicit_logfile == NULL");
}
- background_process = False;
+ child->domain = domain;
}
+struct winbindd_child *children = NULL;
-/*
-the main dual daemon
-*/
-void do_dual_daemon(void)
+void winbind_child_died(pid_t pid)
{
- int fdpair[2];
- struct winbindd_cli_state state;
+ struct winbindd_child *child;
+
+ for (child = children; child != NULL; child = child->next) {
+ if (child->pid == pid) {
+ break;
+ }
+ }
+
+ if (child == NULL) {
+ DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid));
+ return;
+ }
+
+ remove_fd_event(&child->event);
+ close(child->event.fd);
+ child->event.fd = 0;
+ child->event.flags = 0;
+ child->pid = 0;
+
+ schedule_async_request(child);
+}
+
+/* Ensure any negative cache entries with the netbios or realm names are removed. */
+
+void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
+{
+ flush_negative_conn_cache_for_domain(domain->name);
+ if (*domain->alt_name) {
+ flush_negative_conn_cache_for_domain(domain->alt_name);
+ }
+}
+
+/* Set our domains as offline and forward the offline message to our children. */
+
+void winbind_msg_offline(struct messaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
+{
+ struct winbindd_child *child;
+ struct winbindd_domain *domain;
+
+ 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;
+ }
+
+ /* Set all our domains as offline. */
+ for (domain = domain_list(); domain; domain = domain->next) {
+ if (domain->internal) {
+ continue;
+ }
+ DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
+ set_domain_offline(domain);
+ }
+
+ for (child = children; child != NULL; child = child->next) {
+ /* Don't send message to idmap child. We've already
+ done so above. */
+ if (!child->domain || (child == idmap_child())) {
+ continue;
+ }
+
+ /* Or internal domains (this should not be possible....) */
+ if (child->domain->internal) {
+ continue;
+ }
+
+ /* Each winbindd child should only process requests for one domain - make sure
+ we only set it online / offline for that domain. */
+
+ DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
+ (unsigned int)child->pid, domain->name ));
+
+ messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
+ MSG_WINBIND_OFFLINE,
+ (uint8 *)child->domain->name,
+ strlen(child->domain->name)+1);
+ }
+}
+
+/* Set our domains as online and forward the online message to our children. */
+
+void winbind_msg_online(struct messaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
+{
+ struct winbindd_child *child;
+ struct winbindd_domain *domain;
+
+ 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();
+
+ smb_nscd_flush_user_cache();
+ smb_nscd_flush_group_cache();
+
+ /* Set all our domains as online. */
+ for (domain = domain_list(); domain; domain = domain->next) {
+ if (domain->internal) {
+ continue;
+ }
+ DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
+
+ winbindd_flush_negative_conn_cache(domain);
+ set_domain_online_request(domain);
+
+ /* Send an online message to the idmap child when our
+ primary domain comes back online */
+
+ if ( domain->primary ) {
+ struct winbindd_child *idmap = idmap_child();
+
+ if ( idmap->pid != 0 ) {
+ messaging_send_buf(msg_ctx,
+ pid_to_procid(idmap->pid),
+ MSG_WINBIND_ONLINE,
+ (uint8 *)domain->name,
+ strlen(domain->name)+1);
+ }
+
+ }
+ }
+
+ for (child = children; child != NULL; child = child->next) {
+ /* Don't send message to idmap child. */
+ if (!child->domain || (child == idmap_child())) {
+ continue;
+ }
+
+ /* Or internal domains (this should not be possible....) */
+ if (child->domain->internal) {
+ continue;
+ }
+
+ /* Each winbindd child should only process requests for one domain - make sure
+ we only set it online / offline for that domain. */
+
+ DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
+ (unsigned int)child->pid, child->domain->name ));
+
+ messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
+ MSG_WINBIND_ONLINE,
+ (uint8 *)child->domain->name,
+ strlen(child->domain->name)+1);
+ }
+}
+
+/* Forward the online/offline messages to our children. */
+void winbind_msg_onlinestatus(struct messaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
+{
+ struct winbindd_child *child;
+
+ DEBUG(10,("winbind_msg_onlinestatus: got onlinestatus message.\n"));
+
+ for (child = children; child != NULL; child = child->next) {
+ if (child->domain && child->domain->primary) {
+ DEBUG(10,("winbind_msg_onlinestatus: "
+ "sending message to pid %u of primary domain.\n",
+ (unsigned int)child->pid));
+ messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
+ MSG_WINBIND_ONLINESTATUS,
+ (uint8 *)data->data,
+ data->length);
+ break;
+ }
+ }
+}
+
+void winbind_msg_dump_event_list(struct messaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
+{
+ struct winbindd_child *child;
+
+ DEBUG(10,("winbind_msg_dump_event_list received\n"));
+
+ dump_event_list(winbind_event_context());
+
+ for (child = children; child != NULL; child = child->next) {
+
+ DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
+ (unsigned int)child->pid));
+
+ messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
+ MSG_DUMP_EVENT_LIST,
+ NULL, 0);
+ }
+
+}
+
+static void account_lockout_policy_handler(struct event_context *ctx,
+ struct timed_event *te,
+ const struct timeval *now,
+ void *private_data)
+{
+ struct winbindd_child *child =
+ (struct winbindd_child *)private_data;
+ TALLOC_CTX *mem_ctx = NULL;
+ struct winbindd_methods *methods;
+ SAM_UNK_INFO_12 lockout_policy;
+ NTSTATUS result;
+
+ DEBUG(10,("account_lockout_policy_handler called\n"));
+
+ TALLOC_FREE(child->lockout_policy_event);
+
+ if ( !winbindd_can_contact_domain( child->domain ) ) {
+ DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
+ "do not have an incoming trust to domain %s\n",
+ child->domain->name));
+
+ return;
+ }
+
+ methods = child->domain->methods;
+
+ mem_ctx = talloc_init("account_lockout_policy_handler ctx");
+ if (!mem_ctx) {
+ result = NT_STATUS_NO_MEMORY;
+ } else {
+ result = methods->lockout_policy(child->domain, mem_ctx, &lockout_policy);
+ }
+
+ talloc_destroy(mem_ctx);
+
+ if (!NT_STATUS_IS_OK(result)) {
+ DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
+ nt_errstr(result)));
+ }
+
+ child->lockout_policy_event = event_add_timed(winbind_event_context(), NULL,
+ 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(struct messaging_context *msg,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
+{
+ struct winbindd_domain *domain;
+ const char *domainname = (const char *)data->data;
+
+ if (data->data == NULL || data->length == 0) {
+ return;
+ }
+
+ DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
+
+ if (!lp_winbind_offline_logon()) {
+ DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
+ return;
+ }
+
+ /* Mark the requested domain offline. */
+
+ for (domain = domain_list(); domain; domain = domain->next) {
+ if (domain->internal) {
+ continue;
+ }
+ if (strequal(domain->name, domainname)) {
+ DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
+ set_domain_offline(domain);
+ }
+ }
+}
+
+/* Deal with a request to go online. */
+
+static void child_msg_online(struct messaging_context *msg,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
+{
+ struct winbindd_domain *domain;
+ const char *domainname = (const char *)data->data;
+
+ if (data->data == NULL || data->length == 0) {
+ return;
+ }
+
+ DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
+
+ 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();
+
+ /* Try and mark everything online - delete any negative cache entries
+ to force a reconnect now. */
+
+ for (domain = domain_list(); domain; domain = domain->next) {
+ if (domain->internal) {
+ continue;
+ }
+ if (strequal(domain->name, domainname)) {
+ DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain->name));
+ winbindd_flush_negative_conn_cache(domain);
+ set_domain_online_request(domain);
+ }
+ }
+}
+
+static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
+{
+ struct winbindd_domain *domain;
+ char *buf = NULL;
+
+ if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
+ get_global_winbindd_state_offline() ?
+ "Offline":"Online")) == NULL) {
+ return NULL;
+ }
+
+ for (domain = domain_list(); domain; domain = domain->next) {
+ if ((buf = talloc_asprintf_append(buf, "%s:%s ",
+ domain->name,
+ domain->online ?
+ "Online":"Offline")) == NULL) {
+ return NULL;
+ }
+ }
+
+ buf = talloc_asprintf_append(buf, "\n");
+
+ DEBUG(5,("collect_onlinestatus: %s", buf));
+
+ return buf;
+}
+
+static void child_msg_onlinestatus(struct messaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
+{
+ TALLOC_CTX *mem_ctx;
+ const char *message;
+ struct server_id *sender;
- if (pipe(fdpair) != 0) {
+ DEBUG(5,("winbind_msg_onlinestatus received.\n"));
+
+ if (!data->data) {
return;
}
+ sender = (struct server_id *)data->data;
+
+ mem_ctx = talloc_init("winbind_msg_onlinestatus");
+ if (mem_ctx == NULL) {
+ return;
+ }
+
+ message = collect_onlinestatus(mem_ctx);
+ if (message == NULL) {
+ talloc_destroy(mem_ctx);
+ return;
+ }
+
+ messaging_send_buf(msg_ctx, *sender, MSG_WINBIND_ONLINESTATUS,
+ (uint8 *)message, strlen(message) + 1);
+
+ talloc_destroy(mem_ctx);
+}
+
+static void child_msg_dump_event_list(struct messaging_context *msg,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
+{
+ DEBUG(5,("child_msg_dump_event_list received\n"));
+
+ dump_event_list(winbind_event_context());
+}
+
+
+static BOOL fork_domain_child(struct winbindd_child *child)
+{
+ int fdpair[2];
+ struct winbindd_cli_state state;
+ struct winbindd_domain *domain;
+
+ if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
+ DEBUG(0, ("Could not open child pipe: %s\n",
+ strerror(errno)));
+ return False;
+ }
+
ZERO_STRUCT(state);
- state.pid = getpid();
+ state.pid = sys_getpid();
- dual_daemon_pipe = fdpair[1];
- state.sock = fdpair[0];
+ /* Stop zombies */
+ CatchChild();
+
+ child->pid = sys_fork();
- if (fork() != 0) {
+ if (child->pid == -1) {
+ DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
+ return False;
+ }
+
+ if (child->pid != 0) {
+ /* Parent */
close(fdpair[0]);
- return;
+ child->next = child->prev = NULL;
+ DLIST_ADD(children, child);
+ child->event.fd = fdpair[1];
+ child->event.flags = 0;
+ child->requests = NULL;
+ add_fd_event(&child->event);
+ return True;
}
+
+ /* Child */
+
+ state.sock = fdpair[0];
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);
}
-
- if (!winbind_setup_common())
- _exit(0);
- dual_daemon_pipe = -1;
- opt_dual_daemon = False;
+ close_conns_after_fork();
+
+ if (!override_logfile) {
+ lp_set_logfile(child->logfilename);
+ reopen_logs();
+ }
+
+ /*
+ * For clustering, we need to re-init our ctdbd connection after the
+ * fork
+ */
+ if (!NT_STATUS_IS_OK(messaging_reinit(winbind_messaging_context())))
+ exit(1);
+
+ /* Don't handle the same messages as our parent. */
+ messaging_deregister(winbind_messaging_context(),
+ MSG_SMB_CONF_UPDATED, NULL);
+ messaging_deregister(winbind_messaging_context(),
+ MSG_SHUTDOWN, NULL);
+ messaging_deregister(winbind_messaging_context(),
+ MSG_WINBIND_OFFLINE, NULL);
+ messaging_deregister(winbind_messaging_context(),
+ MSG_WINBIND_ONLINE, NULL);
+ messaging_deregister(winbind_messaging_context(),
+ MSG_WINBIND_ONLINESTATUS, NULL);
+ messaging_deregister(winbind_messaging_context(),
+ MSG_DUMP_EVENT_LIST, NULL);
+
+ /* Handle online/offline messages. */
+ messaging_register(winbind_messaging_context(), NULL,
+ MSG_WINBIND_OFFLINE, child_msg_offline);
+ messaging_register(winbind_messaging_context(), NULL,
+ MSG_WINBIND_ONLINE, child_msg_online);
+ messaging_register(winbind_messaging_context(), NULL,
+ MSG_WINBIND_ONLINESTATUS, child_msg_onlinestatus);
+ messaging_register(winbind_messaging_context(), NULL,
+ MSG_DUMP_EVENT_LIST, child_msg_dump_event_list);
+
+ if ( child->domain ) {
+ child->domain->startup = True;
+ child->domain->startup_time = time(NULL);
+ }
+
+ /* Ensure we have no pending check_online events other
+ than one for this domain. */
+
+ for (domain = domain_list(); domain; domain = domain->next) {
+ if (domain != child->domain) {
+ TALLOC_FREE(domain->check_online_event);
+ }
+ }
+
+ /* Ensure we're not handling an event inherited from
+ our parent. */
+
+ cancel_named_event(winbind_event_context(),
+ "krb5_ticket_refresh_handler");
+
+ /* We might be in the idmap child...*/
+ if (child->domain && !(child->domain->internal) &&
+ lp_winbind_offline_logon()) {
+
+ set_domain_online_request(child->domain);
+
+ child->lockout_policy_event = event_add_timed(
+ winbind_event_context(), NULL, timeval_zero(),
+ "account_lockout_policy_handler",
+ account_lockout_policy_handler,
+ child);
+ }
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(winbind_event_context(), 0, NULL, NULL);
+
+ GetTimeOfDay(&now);
+
+ if (child->domain && child->domain->startup &&
+ (now.tv_sec > child->domain->startup_time + 30)) {
+ /* No longer in "startup" mode. */
+ DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
+ child->domain->name ));
+ child->domain->startup = False;
+ }
+
+ tp = get_timed_events_timeout(winbind_event_context(), &t);
+ if (tp) {
+ DEBUG(11,("select will use timeout of %u.%u seconds\n",
+ (unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
+ }
+
+ /* Handle messages */
+
+ message_dispatch(winbind_messaging_context());
+
+ 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 */
- winbind_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,("dual daemon request %d\n", (int)state.request.cmd));
-
- /* special handling for the stateful requests */
- switch (state.request.cmd) {
- case WINBINDD_GETPWENT:
- winbindd_setpwent(&state);
- break;
-
- case WINBINDD_GETGRENT:
- case WINBINDD_GETGRLST:
- winbindd_setgrent(&state);
- break;
- default:
- break;
- }
+ DEBUG(4,("child daemon request %d\n", (int)state.request.cmd));
- winbind_process_packet(&state);
- SAFE_FREE(state.response.extra_data);
+ ZERO_STRUCT(state.response);
+ state.request.null_term = '\0';
+ child_process_request(child->domain, &state);
- free_getent_state(state.getpwent_state);
- free_getent_state(state.getgrent_state);
- state.getpwent_state = NULL;
- state.getgrent_state = NULL;
+ SAFE_FREE(state.request.extra_data.data);
+
+ cache_store_response(sys_getpid(), &state.response);
+
+ SAFE_FREE(state.response.extra_data.data);
+
+ /* We just send the result code back, the result
+ * structure needs to be fetched via the
+ * winbindd_cache. Hmm. That needs fixing... */
+
+ if (write_data(state.sock,
+ (const char *)&state.response.result,
+ sizeof(state.response.result)) !=
+ sizeof(state.response.result)) {
+ DEBUG(0, ("Could not write result\n"));
+ exit(1);
}
}
}
-
git.samba.org / sfrench / samba-autobuild / .git / blobdiff