r24274: - merge from ctdb bzr tree

- use ctdb_attach() instead of ctdb_db_handle()

- make ctdb_attach() return an existing db handle if it exists
(This used to be commit be85c48f8d4a22fd4ed922be6f7f1979f349d291)

source4/cluster/ctdb/client/ctdb_client.c

@@ -1432,6 +1432,11 @@ struct ctdb_db_context *ctdb_attach(struct ctdb_context *ctdb, const char *name)
 	int ret;
 	int32_t res;
 
+	ctdb_db = ctdb_db_handle(ctdb, name);
+	if (ctdb_db) {
+		return ctdb_db;
+	}
+
 	ctdb_db = talloc_zero(ctdb, struct ctdb_db_context);
 	CTDB_NO_MEMORY_NULL(ctdb, ctdb_db);
 
@@ -2094,6 +2099,59 @@ int ctdb_ctrl_get_all_tunables(struct ctdb_context *ctdb,
 }
 
 
+/*
+  kill a tcp connection
+ */
+int ctdb_ctrl_killtcp(struct ctdb_context *ctdb, 
+		      struct timeval timeout, 
+		      uint32_t destnode,
+		      struct ctdb_control_killtcp *killtcp)
+{
+	TDB_DATA data;
+	int32_t res;
+	int ret;
+
+	data.dsize = sizeof(struct ctdb_control_killtcp);
+	data.dptr  = (unsigned char *)killtcp;
+
+	ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_KILL_TCP, 0, data, NULL,
+			   NULL, &res, &timeout, NULL);
+	if (ret != 0 || res != 0) {
+		DEBUG(0,(__location__ " ctdb_control for killtcp failed\n"));
+		return -1;
+	}
+
+	return 0;
+}
+
+/*
+  get a list of all tcp tickles that a node knows about for a particular vnn
+ */
+int ctdb_ctrl_get_tcp_tickles(struct ctdb_context *ctdb, 
+			      struct timeval timeout, uint32_t destnode, 
+			      TALLOC_CTX *mem_ctx, uint32_t vnn,
+			      struct ctdb_control_tcp_tickle_list **list)
+{
+	int ret;
+	TDB_DATA data, outdata;
+	int32_t status;
+
+	data.dptr = (uint8_t*)&vnn;
+	data.dsize = sizeof(vnn);
+
+	ret = ctdb_control(ctdb, destnode, 0, 
+			   CTDB_CONTROL_GET_TCP_TICKLE_LIST, 0, data, 
+			   mem_ctx, &outdata, &status, NULL, NULL);
+	if (ret != 0) {
+		DEBUG(0,(__location__ " ctdb_control for get tcp tickles failed\n"));
+		return -1;
+	}
+
+	*list = (struct ctdb_control_tcp_tickle_list *)outdata.dptr;
+
+	return status;
+}
+
 /*
   initialise the ctdb daemon for client applications
 
@@ -2109,6 +2167,8 @@ struct ctdb_context *ctdb_init(struct event_context *ev)
 	ctdb->idr = idr_init(ctdb);
 	CTDB_NO_MEMORY_NULL(ctdb, ctdb->idr);
 
+	ctdb_set_socketname(ctdb, CTDB_PATH);
+
 	return ctdb;
 }
 

source4/cluster/ctdb/common/cmdline.c

@@ -102,20 +102,20 @@ struct ctdb_context *ctdb_cmdline_client(struct event_context *ev)
 	/* initialise ctdb */
 	ctdb = ctdb_init(ev);
 	if (ctdb == NULL) {
-		printf("Failed to init ctdb\n");
+		fprintf(stderr, "Failed to init ctdb\n");
 		exit(1);
 	}
 
 	/* tell ctdb the socket address */
 	ret = ctdb_set_socketname(ctdb, ctdb_cmdline.socketname);
 	if (ret == -1) {
-		printf("ctdb_set_socketname failed - %s\n", ctdb_errstr(ctdb));
+		fprintf(stderr, "ctdb_set_socketname failed - %s\n", ctdb_errstr(ctdb));
 		exit(1);
 	}
 
 	ret = ctdb_socket_connect(ctdb);
 	if (ret != 0) {
-		DEBUG(0,(__location__ " Failed to connect to daemon\n"));
+		fprintf(stderr, __location__ " Failed to connect to daemon\n");
 		talloc_free(ctdb);
 		return NULL;
 	}

source4/cluster/ctdb/common/ctdb_util.c

@@ -192,20 +192,42 @@ struct ctdb_rec_data *ctdb_marshall_record(TALLOC_CTX *mem_ctx, uint32_t reqid,
 /*
   if possible, make this task real time
  */
-void ctdb_set_realtime(bool enable)
+void ctdb_set_scheduler(struct ctdb_context *ctdb)
 {
-#if HAVE_SCHED_SETSCHEDULER
+#if HAVE_SCHED_SETSCHEDULER	
 	struct sched_param p;
-	p.__sched_priority = 1;
+	if (ctdb->saved_scheduler_param == NULL) {
+		ctdb->saved_scheduler_param = talloc_size(ctdb, sizeof(p));
+	}
+	
+	if (sched_getparam(0, (struct sched_param *)ctdb->saved_scheduler_param) == -1) {
+		DEBUG(0,("Unable to get old scheduler params\n"));
+		return;
+	}
 
-	if (enable) {
-		if (sched_setscheduler(getpid(), SCHED_FIFO, &p) == -1) {
-			DEBUG(0,("Unable to set scheduler to SCHED_FIFO (%s)\n", strerror(errno)));
-		} else {
-			DEBUG(0,("Set scheduler to SCHED_FIFO\n"));
-		}
+	p = *(struct sched_param *)ctdb->saved_scheduler_param;
+	p.sched_priority = 1;
+
+	if (sched_setscheduler(0, SCHED_FIFO, &p) == -1) {
+		DEBUG(0,("Unable to set scheduler to SCHED_FIFO (%s)\n", 
+			 strerror(errno)));
 	} else {
-		sched_setscheduler(getpid(), SCHED_OTHER, &p);
+		DEBUG(0,("Set scheduler to SCHED_FIFO\n"));
+	}
+#endif
+}
+
+/*
+  restore previous scheduler parameters
+ */
+void ctdb_restore_scheduler(struct ctdb_context *ctdb)
+{
+#if HAVE_SCHED_SETSCHEDULER	
+	if (ctdb->saved_scheduler_param == NULL) {
+		ctdb_fatal(ctdb, "No saved scheduler parameters\n");
+	}
+	if (sched_setscheduler(0, SCHED_OTHER, (struct sched_param *)ctdb->saved_scheduler_param) == -1) {
+		ctdb_fatal(ctdb, "Unable to restore old scheduler parameters\n");
 	}
 #endif
 }

source4/cluster/ctdb/configure.ac

@@ -14,6 +14,23 @@ AC_DEFUN([SMB_ENABLE], [echo -n ""])
 AC_INIT(ctdb.h)
 AC_CONFIG_SRCDIR([server/ctdbd.c])
 
+case `uname` in
+  Linux*)
+    CTDB_SYSTEM_OBJ=common/system_linux.o
+    CTDB_SCSI_IO=bin/scsi_io
+    CTDB_PCAP_LDFLAGS=
+    ;;
+  AIX*)
+    CTDB_SYSTEM_OBJ=common/system_aix.o
+    CTDB_SCSI_IO=
+    CTDB_PCAP_LDFLAGS=-lpcap
+    ;;
+  *)
+    echo unknown system  cant configure
+    exit
+    ;;
+esac
+
 AC_LIBREPLACE_ALL_CHECKS
 
 if test "$ac_cv_prog_gcc" = yes; then
@@ -44,5 +61,8 @@ if test x"$ctdb_cv_HAVE_SOCK_SIN_LEN" = x"yes"; then
 fi
 
 AC_SUBST(EXTRA_OBJ)
+AC_SUBST(CTDB_SYSTEM_OBJ)
+AC_SUBST(CTDB_SCSI_IO)
+AC_SUBST(CTDB_PCAP_LDFLAGS)
 
 AC_OUTPUT(Makefile)

source4/cluster/ctdb/include/ctdb.h

@@ -367,4 +367,6 @@ int ctdb_ctrl_modflags(struct ctdb_context *ctdb,
 		       uint32_t destnode, 
 		       uint32_t set, uint32_t clear);
 
+int ctdb_socket_connect(struct ctdb_context *ctdb);
+
 #endif

source4/cluster/ctdb/include/ctdb_private.h

@@ -37,6 +37,35 @@
 #define CTDB_NULL_FUNC      0xFF000001
 #define CTDB_FETCH_FUNC     0xFF000002
 
+/*
+  a tcp connection description
+ */
+struct ctdb_tcp_connection {
+	struct sockaddr_in saddr;
+	struct sockaddr_in daddr;
+};
+
+/* the wire representation for a tcp tickle array */
+struct ctdb_tcp_wire_array {
+	uint32_t num;
+	struct ctdb_tcp_connection connections[1];
+};	
+
+/* the list of tcp tickles used by get/set tcp tickle list */
+struct ctdb_control_tcp_tickle_list {
+	uint32_t vnn;
+	struct ctdb_tcp_wire_array tickles;
+};
+
+/*
+  array of tcp connections
+ */
+struct ctdb_tcp_array {
+	uint32_t num;
+	struct ctdb_tcp_connection *connections;
+};	
+
+
 /* all tunable variables go in here */
 struct ctdb_tunable {
 	uint32_t max_redirect_count;
@@ -51,6 +80,7 @@ struct ctdb_tunable {
 	uint32_t election_timeout;
 	uint32_t takeover_timeout;
 	uint32_t monitor_interval;
+	uint32_t tickle_update_interval;
 	uint32_t script_timeout;
 	uint32_t recovery_grace_period;
 	uint32_t recovery_ban_period;
@@ -139,6 +169,13 @@ struct ctdb_node {
 	/* the node number that has taken over this nodes public address, if any. 
 	   If not taken over, then set to -1 */
 	int32_t takeover_vnn;
+
+	/* List of clients to tickle for this public address */
+	struct ctdb_tcp_array *tcp_array;
+
+	/* whether we need to update the other nodes with changes to our list
+	   of connected clients */
+	bool tcp_update_needed;
 };
 
 /*
@@ -274,6 +311,7 @@ struct ctdb_context {
 	uint32_t recovery_mode;
 	uint32_t monitoring_mode;
 	TALLOC_CTX *monitor_context;
+	TALLOC_CTX *tickle_update_context;
 	struct ctdb_tunable tunable;
 	enum ctdb_freeze_mode freeze_mode;
 	struct ctdb_freeze_handle *freeze_handle;
@@ -305,8 +343,10 @@ struct ctdb_context {
 	uint32_t recovery_master;
 	struct ctdb_call_state *pending_calls;
 	struct ctdb_takeover takeover;
-	struct ctdb_tcp_list *tcp_list;
 	struct ctdb_client_ip *client_ip_list;
+	bool do_setsched;
+	void *saved_scheduler_param;
+	struct ctdb_kill_tcp *killtcp;
 };
 
 struct ctdb_db_context {
@@ -406,6 +446,9 @@ enum ctdb_controls {CTDB_CONTROL_PROCESS_EXISTS          = 0,
 		    CTDB_CONTROL_GET_PUBLIC_IPS          = 51,
 		    CTDB_CONTROL_MODIFY_FLAGS            = 52,
 		    CTDB_CONTROL_GET_ALL_TUNABLES        = 53,
+		    CTDB_CONTROL_KILL_TCP                = 54,
+		    CTDB_CONTROL_GET_TCP_TICKLE_LIST     = 55,
+		    CTDB_CONTROL_SET_TCP_TICKLE_LIST     = 56,
 };
 
 /*
@@ -441,6 +484,14 @@ struct ctdb_control_tcp {
 	struct sockaddr_in dest;
 };
 
+/*
+  struct for kill_tcp control
+ */
+struct ctdb_control_killtcp {
+	struct sockaddr_in src;
+	struct sockaddr_in dst;
+};
+
 /*
   struct for tcp_add and tcp_remove controls
  */
@@ -931,6 +982,7 @@ uint32_t ctdb_get_num_active_nodes(struct ctdb_context *ctdb);
 
 void ctdb_stop_monitoring(struct ctdb_context *ctdb);
 void ctdb_start_monitoring(struct ctdb_context *ctdb);
+void ctdb_start_tcp_tickle_update(struct ctdb_context *ctdb);
 void ctdb_send_keepalive(struct ctdb_context *ctdb, uint32_t destnode);
 
 void ctdb_daemon_cancel_controls(struct ctdb_context *ctdb, struct ctdb_node *node);
@@ -947,7 +999,8 @@ int ctdb_ctrl_set_rsn_nonempty(struct ctdb_context *ctdb, struct timeval timeout
 			       uint32_t destnode, uint32_t db_id, uint64_t rsn);
 int ctdb_ctrl_delete_low_rsn(struct ctdb_context *ctdb, struct timeval timeout, 
 			     uint32_t destnode, uint32_t db_id, uint64_t rsn);
-void ctdb_set_realtime(bool enable);
+void ctdb_set_scheduler(struct ctdb_context *ctdb);
+void ctdb_restore_scheduler(struct ctdb_context *ctdb);
 int32_t ctdb_control_takeover_ip(struct ctdb_context *ctdb, 
 				 struct ctdb_req_control *c,
 				 TDB_DATA indata, 
@@ -980,22 +1033,23 @@ int ctdb_ctrl_get_public_ips(struct ctdb_context *ctdb,
 /* from takeover/system.c */
 int ctdb_sys_send_arp(const struct sockaddr_in *saddr, const char *iface);
 bool ctdb_sys_have_ip(const char *ip);
-int ctdb_sys_send_tcp(const struct sockaddr_in *dest, 
+int ctdb_sys_send_tcp(int fd,
+		      const struct sockaddr_in *dest, 
 		      const struct sockaddr_in *src,
 		      uint32_t seq, uint32_t ack, int rst);
-int ctdb_sys_kill_tcp(struct event_context *ev,
-		      const struct sockaddr_in *dest, 
-		      const struct sockaddr_in *src);
 
 int ctdb_set_public_addresses(struct ctdb_context *ctdb, const char *alist);
 int ctdb_set_event_script(struct ctdb_context *ctdb, const char *script);
 int ctdb_takeover_run(struct ctdb_context *ctdb, struct ctdb_node_map *nodemap);
 
 int32_t ctdb_control_tcp_client(struct ctdb_context *ctdb, uint32_t client_id, 
-				uint32_t srcnode, TDB_DATA indata);
+				TDB_DATA indata);
 int32_t ctdb_control_tcp_add(struct ctdb_context *ctdb, TDB_DATA indata);
 int32_t ctdb_control_tcp_remove(struct ctdb_context *ctdb, TDB_DATA indata);
 int32_t ctdb_control_startup(struct ctdb_context *ctdb, uint32_t vnn);
+int32_t ctdb_control_kill_tcp(struct ctdb_context *ctdb, TDB_DATA indata);
+int32_t ctdb_control_get_tcp_tickle_list(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata);
+int32_t ctdb_control_set_tcp_tickle_list(struct ctdb_context *ctdb, TDB_DATA indata);
 
 void ctdb_takeover_client_destructor_hook(struct ctdb_client *client);
 int ctdb_event_script(struct ctdb_context *ctdb, const char *fmt, ...) PRINTF_ATTRIBUTE(2,3);
@@ -1032,4 +1086,22 @@ void ctdb_start_freeze(struct ctdb_context *ctdb);
 
 bool parse_ip_port(const char *s, struct sockaddr_in *ip);
 
+int ctdb_sys_open_capture_socket(const char *iface, void **private_data);
+int ctdb_sys_close_capture_socket(void *private_data);
+int ctdb_sys_open_sending_socket(void);
+int ctdb_sys_read_tcp_packet(int s, void *private_data, struct sockaddr_in *src, struct sockaddr_in *dst,
+			     uint32_t *ack_seq, uint32_t *seq);
+
+int ctdb_ctrl_killtcp(struct ctdb_context *ctdb, 
+		      struct timeval timeout, 
+		      uint32_t destnode,
+		      struct ctdb_control_killtcp *killtcp);
+
+int ctdb_ctrl_get_tcp_tickles(struct ctdb_context *ctdb, 
+		      struct timeval timeout, 
+		      uint32_t destnode,
+		      TALLOC_CTX *mem_ctx,
+		      uint32_t vnn,
+		      struct ctdb_control_tcp_tickle_list **list);
+
 #endif

source4/cluster/ctdb/opendb_ctdb.c

@@ -86,7 +86,7 @@ static struct odb_context *odb_ctdb_init(TALLOC_CTX *mem_ctx,
 	}
 
 	odb->ctdb = ctdb;
-	odb->ctdb_db = ctdb_db_handle(ctdb, "opendb");
+	odb->ctdb_db = ctdb_attach(ctdb, "opendb");
 	if (!odb->ctdb_db) {
 		DEBUG(0,("Failed to get attached ctdb db handle for opendb\n"));
 		talloc_free(odb);

source4/cluster/ctdb/packaging/RPM/ctdb.spec

@@ -5,7 +5,7 @@ Vendor: Samba Team
 Packager: Samba Team <samba@samba.org>
 Name: ctdb
 Version: 1.0
-Release: 7
+Release: 8
 Epoch: 0
 License: GNU GPL version 3
 Group: System Environment/Daemons
@@ -102,6 +102,7 @@ fi
 %{_sysconfdir}/ctdb/statd-callout
 %{_sbindir}/ctdbd
 %{_bindir}/ctdb
+%{_bindir}/smnotify
 %{_bindir}/onnode.ssh
 %{_bindir}/onnode.rsh
 %{_bindir}/onnode