clear cluster_master on election so that slaves will accept a new master

[l2tpns.git] / l2tpns.c

diff --git a/l2tpns.c b/l2tpns.c
index 329d6f9..e9f768a 100644 (file)
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -4,7 +4,7 @@
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 

-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.73.2.14 2005/05/31 11:39:36 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.73.2.17 2005/07/03 02:40:22 bodea Exp $";

 
 #include <arpa/inet.h>
 #include <assert.h>
 
 #include <arpa/inet.h>
 #include <assert.h>


@@ -112,6 +112,7 @@ config_descriptt config_values[] = {
        CONFIG("accounting_dir", accounting_dir, STRING),
        CONFIG("setuid", target_uid, INT),
        CONFIG("dump_speed", dump_speed, BOOL),
        CONFIG("accounting_dir", accounting_dir, STRING),
        CONFIG("setuid", target_uid, INT),
        CONFIG("dump_speed", dump_speed, BOOL),

+       CONFIG("cleanup_interval", cleanup_interval, INT),

        CONFIG("multi_read_count", multi_read_count, INT),
        CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
        CONFIG("lock_pages", lock_pages, BOOL),
        CONFIG("multi_read_count", multi_read_count, INT),
        CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
        CONFIG("lock_pages", lock_pages, BOOL),


@@ -183,12 +184,11 @@ static int unhide_avp(uint8_t *avp, tunnelidt t, sessionidt s, uint16_t length);
 // on slaves, alow BGP to withdraw cleanly before exiting
 #define QUIT_DELAY     5
 
 // on slaves, alow BGP to withdraw cleanly before exiting
 #define QUIT_DELAY     5
 

-// return internal time (10ths since process startup), set f if given
-static clockt now(double *f)
+// return internal time (10ths since process startup)
+static clockt now(void)

 {
        struct timeval t;
        gettimeofday(&t, 0);
 {
        struct timeval t;
        gettimeofday(&t, 0);

-       if (f) *f = t.tv_sec + t.tv_usec / 1000000.0;

        return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
 }
 
        return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
 }
 


@@ -198,7 +198,7 @@ static clockt now(double *f)
 clockt backoff(uint8_t try)
 {
        if (try > 5) try = 5;                  // max backoff
 clockt backoff(uint8_t try)
 {
        if (try > 5) try = 5;                  // max backoff

-       return now(NULL) + 10 * (1 << try);
+       return now() + 10 * (1 << try);

 }
 
 
 }
 
 


@@ -2062,61 +2062,42 @@ static void processtun(uint8_t * buf, int len)
        // Else discard.
 }
 
        // Else discard.
 }
 

-// Handle retries, timeouts.  Runs every 1/10th sec, want to ensure
-// that we look at the whole of the tunnel, radius and session tables
-// every second
-static void regular_cleanups(double period)
-{
-       // Next tunnel, radius and session to check for actions on.
-       static tunnelidt t = 0;
-       static int r = 0;
-       static sessionidt s = 0;
-
-       int t_actions = 0;
-       int r_actions = 0;
-       int s_actions = 0;
-
-       int t_slice;
-       int r_slice;
-       int s_slice;
+//
+// Maximum number of actions to complete.
+// This is to avoid sending out too many packets
+// at once.
+#define MAX_ACTIONS 500

 
 

-       int i;
+static int regular_cleanups(void)
+{
+       static sessionidt s = 0;        // Next session to check for actions on.
+       tunnelidt t;
+       int count=0,i;
+       uint16_t r;
+       static clockt next_acct = 0;
+       static clockt next_shut_acct = 0;

        int a;
 
        int a;
 

-       // divide up tables into slices based on the last run
-       t_slice = config->cluster_highest_tunnelid  * period;
-       r_slice = (MAXRADIUS - 1)                   * period;
-       s_slice = config->cluster_highest_sessionid * period;
-
-       if (t_slice < 1)
-           t_slice = 1;
-       else if (t_slice > config->cluster_highest_tunnelid)
-           t_slice = config->cluster_highest_tunnelid;
-
-       if (r_slice < 1)
-           r_slice = 1;
-       else if (r_slice > (MAXRADIUS - 1))
-           r_slice = MAXRADIUS - 1;
+       LOG(3, 0, 0, "Begin regular cleanup\n");

 
 

-       if (s_slice < 1)
-           s_slice = 1;
-       else if (s_slice > config->cluster_highest_sessionid)
-           s_slice = config->cluster_highest_sessionid;
-
-       LOG(5, 0, 0, "Begin regular cleanup (last %f seconds ago)\n", period);
-
-       for (i = 0; i < t_slice; i++)
+       for (r = 1; r < MAXRADIUS; r++)
+       {
+               if (!radius[r].state)
+                       continue;
+               if (radius[r].retry)
+               {
+                       if (radius[r].retry <= TIME)
+                               radiusretry(r);
+               } else
+                       radius[r].retry = backoff(radius[r].try+1);     // Is this really needed? --mo
+       }
+       for (t = 1; t <= config->cluster_highest_tunnelid; t++)

        {
        {

-               t++;
-               if (t > config->cluster_highest_tunnelid)
-                       t = 1;
-

                // check for expired tunnels
                if (tunnel[t].die && tunnel[t].die <= TIME)
                {
                        STAT(tunnel_timeout);
                        tunnelkill(t, "Expired");
                // check for expired tunnels
                if (tunnel[t].die && tunnel[t].die <= TIME)
                {
                        STAT(tunnel_timeout);
                        tunnelkill(t, "Expired");

-                       t_actions++;

                        continue;
                }
                // check for message resend
                        continue;
                }
                // check for message resend


@@ -2136,8 +2117,6 @@ static void regular_cleanups(double period)
                                                tunnelsend(c->buf, c->length, t);
                                                c = c->next;
                                        }
                                                tunnelsend(c->buf, c->length, t);
                                                c = c->next;
                                        }

-
-                               t_actions++;

                        }
                }
                // Send hello
                        }
                }
                // Send hello


@@ -2146,7 +2125,6 @@ static void regular_cleanups(double period)
                        controlt *c = controlnew(6); // sending HELLO
                        controladd(c, t, 0); // send the message
                        LOG(3, 0, t, "Sending HELLO message\n");
                        controlt *c = controlnew(6); // sending HELLO
                        controladd(c, t, 0); // send the message
                        LOG(3, 0, t, "Sending HELLO message\n");

-                       t_actions++;

                }
 
                // Check for tunnel changes requested from the CLI
                }
 
                // Check for tunnel changes requested from the CLI


@@ -2157,28 +2135,13 @@ static void regular_cleanups(double period)
                        {
                                LOG(2, 0, t, "Dropping tunnel by CLI\n");
                                tunnelshutdown(t, "Requested by administrator");
                        {
                                LOG(2, 0, t, "Dropping tunnel by CLI\n");
                                tunnelshutdown(t, "Requested by administrator");

-                               t_actions++;

                        }
                }
                        }
                }

-       }
-
-       for (i = 0; i < r_slice; i++)
-       {
-               r++;
-               if (r >= MAXRADIUS)
-                       r = 1;
-
-               if (!radius[r].state)
-                       continue;

 
 

-               if (radius[r].retry <= TIME)
-               {
-                       radiusretry(r);
-                       r_actions++;
-               }

        }
 
        }
 

-       for (i = 0; i < s_slice; i++)
+       count = 0;
+       for (i = 1; i <= config->cluster_highest_sessionid; i++)

        {
                s++;
                if (s > config->cluster_highest_sessionid)
        {
                s++;
                if (s > config->cluster_highest_sessionid)


@@ -2192,14 +2155,13 @@ static void regular_cleanups(double period)
                        // IPCP has not completed yet. Resend
                        LOG(3, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n");
                        sendipcp(session[s].tunnel, s);
                        // IPCP has not completed yet. Resend
                        LOG(3, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n");
                        sendipcp(session[s].tunnel, s);

-                       s_actions++;

                }
 
                // check for expired sessions
                if (session[s].die && session[s].die <= TIME)
                {
                        sessionkill(s, "Expired");
                }
 
                // check for expired sessions
                if (session[s].die && session[s].die <= TIME)
                {
                        sessionkill(s, "Expired");

-                       s_actions++;
+                       if (++count >= MAX_ACTIONS) break;

                        continue;
                }
 
                        continue;
                }
 


@@ -2208,7 +2170,7 @@ static void regular_cleanups(double period)
                {
                        sessionshutdown(s, "No response to LCP ECHO requests");
                        STAT(session_timeout);
                {
                        sessionshutdown(s, "No response to LCP ECHO requests");
                        STAT(session_timeout);

-                       s_actions++;
+                       if (++count >= MAX_ACTIONS) break;

                        continue;
                }
 
                        continue;
                }
 


@@ -2228,7 +2190,7 @@ static void regular_cleanups(double period)
                        LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
                                        (int)(time_now - session[s].last_packet));
                        tunnelsend(b, 24, session[s].tunnel); // send it
                        LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
                                        (int)(time_now - session[s].last_packet));
                        tunnelsend(b, 24, session[s].tunnel); // send it

-                       s_actions++;
+                       if (++count >= MAX_ACTIONS) break;

                }
 
                // Check for actions requested from the CLI
                }
 
                // Check for actions requested from the CLI


@@ -2242,7 +2204,6 @@ static void regular_cleanups(double period)
                                LOG(2, s, session[s].tunnel, "Dropping session by CLI\n");
                                sessionshutdown(s, "Requested by administrator");
                                a = 0; // dead, no need to check for other actions
                                LOG(2, s, session[s].tunnel, "Dropping session by CLI\n");
                                sessionshutdown(s, "Requested by administrator");
                                a = 0; // dead, no need to check for other actions

-                               s_actions++;

                        }
 
                        if (a & CLI_SESS_NOSNOOP)
                        }
 
                        if (a & CLI_SESS_NOSNOOP)


@@ -2250,7 +2211,6 @@ static void regular_cleanups(double period)
                                LOG(2, s, session[s].tunnel, "Unsnooping session by CLI\n");
                                session[s].snoop_ip = 0;
                                session[s].snoop_port = 0;
                                LOG(2, s, session[s].tunnel, "Unsnooping session by CLI\n");
                                session[s].snoop_ip = 0;
                                session[s].snoop_port = 0;

-                               s_actions++;

                                send++;
                        }
                        else if (a & CLI_SESS_SNOOP)
                                send++;
                        }
                        else if (a & CLI_SESS_SNOOP)


@@ -2261,7 +2221,6 @@ static void regular_cleanups(double period)
 
                                session[s].snoop_ip = cli_session_actions[s].snoop_ip;
                                session[s].snoop_port = cli_session_actions[s].snoop_port;
 
                                session[s].snoop_ip = cli_session_actions[s].snoop_ip;
                                session[s].snoop_port = cli_session_actions[s].snoop_port;

-                               s_actions++;

                                send++;
                        }
 
                                send++;
                        }
 


@@ -2269,7 +2228,6 @@ static void regular_cleanups(double period)
                        {
                                LOG(2, s, session[s].tunnel, "Un-throttling session by CLI\n");
                                throttle_session(s, 0, 0);
                        {
                                LOG(2, s, session[s].tunnel, "Un-throttling session by CLI\n");
                                throttle_session(s, 0, 0);

-                               s_actions++;

                                send++;
                        }
                        else if (a & CLI_SESS_THROTTLE)
                                send++;
                        }
                        else if (a & CLI_SESS_THROTTLE)


@@ -2279,7 +2237,6 @@ static void regular_cleanups(double period)
                                    cli_session_actions[s].throttle_out);
 
                                throttle_session(s, cli_session_actions[s].throttle_in, cli_session_actions[s].throttle_out);
                                    cli_session_actions[s].throttle_out);
 
                                throttle_session(s, cli_session_actions[s].throttle_in, cli_session_actions[s].throttle_out);

-                               s_actions++;

                                send++;
                        }
 
                                send++;
                        }
 


@@ -2287,7 +2244,6 @@ static void regular_cleanups(double period)
                        {
                                LOG(2, s, session[s].tunnel, "Un-filtering session by CLI\n");
                                filter_session(s, 0, 0);
                        {
                                LOG(2, s, session[s].tunnel, "Un-filtering session by CLI\n");
                                filter_session(s, 0, 0);

-                               s_actions++;

                                send++;
                        }
                        else if (a & CLI_SESS_FILTER)
                                send++;
                        }
                        else if (a & CLI_SESS_FILTER)


@@ -2297,21 +2253,39 @@ static void regular_cleanups(double period)
                                    cli_session_actions[s].filter_out);
 
                                filter_session(s, cli_session_actions[s].filter_in, cli_session_actions[s].filter_out);
                                    cli_session_actions[s].filter_out);
 
                                filter_session(s, cli_session_actions[s].filter_in, cli_session_actions[s].filter_out);

-                               s_actions++;

                                send++;
                        }
 
                        if (send)
                                cluster_send_session(s);
                                send++;
                        }
 
                        if (send)
                                cluster_send_session(s);

+
+                       if (++count >= MAX_ACTIONS) break;
+               }
+       }
+
+       if (*config->accounting_dir)
+       {
+               if (next_acct <= TIME)
+               {
+                       // Dump accounting data
+                       next_acct = TIME + ACCT_TIME;
+                       next_shut_acct = TIME + ACCT_SHUT_TIME;
+                       dump_acct_info(1);
+               }
+               else if (next_shut_acct <= TIME)
+               {
+                       // Dump accounting data for shutdown sessions
+                       next_shut_acct = TIME + ACCT_SHUT_TIME;
+                       if (shut_acct_n)
+                               dump_acct_info(0);

                }
        }
 
                }
        }
 

-       LOG((t_actions || r_actions || s_actions) ? 4 : 5, 0, 0,
-               "Regular cleanup: processed %d tunnels, %d radius and %d sessions\n",
-               t_actions, r_actions, s_actions);
+       if (count >= MAX_ACTIONS)
+               return 1;       // Didn't finish!

 
 

-       LOG(5, 0, 0, "End regular cleanup: checked %d tunnels, %d radius and %d sessions\n",
-               t_slice, r_slice, s_slice);
+       LOG(3, 0, 0, "End regular cleanup (%d actions), next in %d seconds\n", count, config->cleanup_interval);
+       return 0;

 }
 
 
 }
 
 


@@ -2406,6 +2380,7 @@ static void mainloop(void)
        uint8_t buf[65536];
        struct timeval to;
        clockt next_cluster_ping = 0;   // send initial ping immediately
        uint8_t buf[65536];
        struct timeval to;
        clockt next_cluster_ping = 0;   // send initial ping immediately

+       time_t next_clean = time_now + config->cleanup_interval;

 
        LOG(4, 0, 0, "Beginning of main loop.  udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
                udpfd, tunfd, cluster_sockfd, controlfd);
 
        LOG(4, 0, 0, "Beginning of main loop.  udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
                udpfd, tunfd, cluster_sockfd, controlfd);


@@ -2430,7 +2405,6 @@ static void mainloop(void)
                fd_set w;
                int bgp_set[BGP_NUM_PEERS];
 #endif /* BGP */
                fd_set w;
                int bgp_set[BGP_NUM_PEERS];
 #endif /* BGP */

-               int more = 0;

 
                if (config->reload_config)
                {
 
                if (config->reload_config)
                {


@@ -2469,7 +2443,7 @@ static void mainloop(void)
 
                STAT(select_called);
 
 
                STAT(select_called);
 

-               TIME = now(NULL);
+               TIME = now();

                if (n < 0)
                {
                        if (errno == EINTR ||
                if (n < 0)
                {
                        if (errno == EINTR ||


@@ -2596,7 +2570,6 @@ static void mainloop(void)
                                        config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
 
                                STAT(multi_read_exceeded);
                                        config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
 
                                STAT(multi_read_exceeded);

-                               more++;

                        }
                }
 
                        }
                }
 


@@ -2619,11 +2592,9 @@ static void mainloop(void)
                                next_cluster_ping = TIME + config->cluster_hb_interval;
                }
 
                                next_cluster_ping = TIME + config->cluster_hb_interval;
                }
 

-               if (!config->cluster_iam_master)
-                       continue;
-

                        // Run token bucket filtering queue..
                        // Only run it every 1/10th of a second.
                        // Run token bucket filtering queue..
                        // Only run it every 1/10th of a second.

+                       // Runs on all machines both master and slave.

                {
                        static clockt last_run = 0;
                        if (last_run != TIME)
                {
                        static clockt last_run = 0;
                        if (last_run != TIME)


@@ -2633,42 +2604,20 @@ static void mainloop(void)
                        }
                }
 
                        }
                }
 

-                       // Handle timeouts, retries etc.
+               /* Handle timeouts. Make sure that this gets run anyway, even if there was
+                * something to read, else under load this will never actually run....
+                *
+                */
+               if (config->cluster_iam_master && next_clean <= time_now)

                {
                {

-                       static double last_clean = 0;
-                       double this_clean;
-                       double diff;
-
-                       TIME = now(&this_clean);
-                       diff = this_clean - last_clean;
-
-                       // Run during idle time (after we've handled
-                       // all incoming packets) or every 1/10th sec
-                       if (!more || diff > 0.1)
+                       if (regular_cleanups())

                        {
                        {

-                               regular_cleanups(diff);
-                               last_clean = this_clean;
+                               // Did it finish?
+                               next_clean = time_now + 1 ;     // Didn't finish. Check quickly.

                        }
                        }

-               }
-
-               if (*config->accounting_dir)
-               {
-                       static clockt next_acct = 0;
-                       static clockt next_shut_acct = 0;
-
-                       if (next_acct <= TIME)
-                       {
-                               // Dump accounting data
-                               next_acct = TIME + ACCT_TIME;
-                               next_shut_acct = TIME + ACCT_SHUT_TIME;
-                               dump_acct_info(1);
-                       }
-                       else if (next_shut_acct <= TIME)
+                       else

                        {
                        {

-                               // Dump accounting data for shutdown sessions
-                               next_shut_acct = TIME + ACCT_SHUT_TIME;
-                               if (shut_acct_n)
-                                       dump_acct_info(0);
+                               next_clean = time_now + config->cleanup_interval; // Did. Move to next interval.

                        }
                }
        }
                        }
                }
        }


@@ -3758,6 +3707,7 @@ static void update_config()
                }
        }
        memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
                }
        }
        memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));

+       if (!config->cleanup_interval) config->cleanup_interval = 10;

        if (!config->multi_read_count) config->multi_read_count = 10;
        if (!config->cluster_address) config->cluster_address = inet_addr(DEFAULT_MCAST_ADDR);
        if (!*config->cluster_interface)
        if (!config->multi_read_count) config->multi_read_count = 10;
        if (!config->cluster_address) config->cluster_address = inet_addr(DEFAULT_MCAST_ADDR);
        if (!*config->cluster_interface)