X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=ofproto%2Ffail-open.c;h=b29e5af2e4ab20507c84b602c9a37b39ce533706;hb=HEAD;hp=6a540ef8b9769db2cd2f488eb3f52257a3e4cd1b;hpb=4a2026dd696e283488c5372bce97eb02005bee6f;p=sliver-openvswitch.git

diff --git a/ofproto/fail-open.c b/ofproto/fail-open.c
index 6a540ef8b..b29e5af2e 100644
--- a/ofproto/fail-open.c
+++ b/ofproto/fail-open.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,21 +18,25 @@
 #include "fail-open.h"
 #include <inttypes.h>
 #include <stdlib.h>
+#include "classifier.h"
+#include "connmgr.h"
 #include "flow.h"
 #include "mac-learning.h"
 #include "odp-util.h"
+#include "ofp-actions.h"
+#include "ofp-util.h"
 #include "ofpbuf.h"
 #include "ofproto.h"
+#include "ofproto-provider.h"
 #include "pktbuf.h"
 #include "poll-loop.h"
 #include "rconn.h"
-#include "status.h"
 #include "timeval.h"
 #include "vconn.h"
-
-#define THIS_MODULE VLM_fail_open
 #include "vlog.h"
 
+VLOG_DEFINE_THIS_MODULE(fail_open);
+
 /*
  * Fail-open mode.
  *
@@ -68,21 +72,38 @@
 
 struct fail_open {
     struct ofproto *ofproto;
-    struct rconn *controller;
-    int trigger_duration;
+    struct connmgr *connmgr;
     int last_disconn_secs;
-    struct status_category *ss_cat;
     long long int next_bogus_packet_in;
     struct rconn_packet_counter *bogus_packet_counter;
 };
 
 static void fail_open_recover(struct fail_open *);
 
-/* Returns true if 'fo' should be in fail-open mode, otherwise false. */
-static inline bool
-should_fail_open(const struct fail_open *fo)
+/* Returns the number of seconds of disconnection after which fail-open mode
+ * should activate. */
+static int
+trigger_duration(const struct fail_open *fo)
 {
-    return rconn_failure_duration(fo->controller) >= fo->trigger_duration;
+    if (!connmgr_has_controllers(fo->connmgr)) {
+        /* Shouldn't ever arrive here, but if we do, never fail open. */
+        return INT_MAX;
+    } else {
+        /* Otherwise, every controller must have a chance to send an
+         * inactivity probe and reconnect before we fail open, so take the
+         * maximum probe interval and multiply by 3:
+         *
+         *  - The first interval is the idle time before sending an inactivity
+         *    probe.
+         *
+         *  - The second interval is the time allowed for a response to the
+         *    inactivity probe.
+         *
+         *  - The third interval is the time allowed to reconnect after no
+         *    response is received.
+         */
+        return connmgr_get_max_probe_interval(fo->connmgr) * 3;
+    }
 }
 
 /* Returns true if 'fo' is currently in fail-open mode, otherwise false. */
@@ -93,31 +114,36 @@ fail_open_is_active(const struct fail_open *fo)
 }
 
 static void
-send_bogus_packet_in(struct fail_open *fo)
+send_bogus_packet_ins(struct fail_open *fo)
 {
+    struct ofproto_packet_in pin;
     uint8_t mac[ETH_ADDR_LEN];
-    struct ofpbuf *opi;
     struct ofpbuf b;
 
-    /* Compose ofp_packet_in. */
     ofpbuf_init(&b, 128);
     eth_addr_nicira_random(mac);
-    compose_benign_packet(&b, "Open vSwitch Controller Probe", 0xa033, mac);
-    opi = make_packet_in(pktbuf_get_null(), OFPP_LOCAL, OFPR_NO_MATCH, &b, 64);
-    ofpbuf_uninit(&b);
+    compose_rarp(&b, mac);
+
+    memset(&pin, 0, sizeof pin);
+    pin.up.packet = ofpbuf_data(&b);
+    pin.up.packet_len = ofpbuf_size(&b);
+    pin.up.reason = OFPR_NO_MATCH;
+    pin.up.fmd.in_port = OFPP_LOCAL;
+    pin.send_len = ofpbuf_size(&b);
+    pin.miss_type = OFPROTO_PACKET_IN_NO_MISS;
+    connmgr_send_packet_in(fo->connmgr, &pin);
 
-    /* Send. */
-    rconn_send_with_limit(fo->controller, opi, fo->bogus_packet_counter, 1);
+    ofpbuf_uninit(&b);
 }
 
-/* Enter fail-open mode if we should be in it.  Handle reconnecting to a
- * controller from fail-open mode. */
+/* Enter fail-open mode if we should be in it. */
 void
 fail_open_run(struct fail_open *fo)
 {
+    int disconn_secs = connmgr_failure_duration(fo->connmgr);
+
     /* Enter fail-open mode if 'fo' is not in it but should be.  */
-    if (should_fail_open(fo)) {
-        int disconn_secs = rconn_failure_duration(fo->controller);
+    if (disconn_secs >= trigger_duration(fo)) {
         if (!fail_open_is_active(fo)) {
             VLOG_WARN("Could not connect to controller (or switch failed "
                       "controller's post-connection admission control "
@@ -137,10 +163,10 @@ fail_open_run(struct fail_open *fo)
 
     /* Schedule a bogus packet-in if we're connected and in fail-open. */
     if (fail_open_is_active(fo)) {
-        if (rconn_is_connected(fo->controller)) {
+        if (connmgr_is_any_controller_connected(fo->connmgr)) {
             bool expired = time_msec() >= fo->next_bogus_packet_in;
             if (expired) {
-                send_bogus_packet_in(fo);
+                send_bogus_packet_ins(fo);
             }
             if (expired || fo->next_bogus_packet_in == LLONG_MAX) {
                 fo->next_bogus_packet_in = time_msec() + 2000;
@@ -156,98 +182,83 @@ fail_open_run(struct fail_open *fo)
  * controller, exits fail open mode. */
 void
 fail_open_maybe_recover(struct fail_open *fo)
+    OVS_EXCLUDED(ofproto_mutex)
 {
-    if (rconn_is_admitted(fo->controller)) {
+    if (fail_open_is_active(fo)
+        && connmgr_is_any_controller_admitted(fo->connmgr)) {
         fail_open_recover(fo);
     }
 }
 
 static void
 fail_open_recover(struct fail_open *fo)
+    OVS_EXCLUDED(ofproto_mutex)
 {
-    if (fail_open_is_active(fo)) {
-        flow_t flow;
+    struct match match;
 
-        VLOG_WARN("No longer in fail-open mode");
-        fo->last_disconn_secs = 0;
-        fo->next_bogus_packet_in = LLONG_MAX;
+    VLOG_WARN("No longer in fail-open mode");
+    fo->last_disconn_secs = 0;
+    fo->next_bogus_packet_in = LLONG_MAX;
 
-        memset(&flow, 0, sizeof flow);
-        ofproto_delete_flow(fo->ofproto, &flow, OVSFW_ALL, FAIL_OPEN_PRIORITY);
-    }
+    match_init_catchall(&match);
+    ofproto_delete_flow(fo->ofproto, &match, FAIL_OPEN_PRIORITY);
 }
 
 void
 fail_open_wait(struct fail_open *fo)
 {
     if (fo->next_bogus_packet_in != LLONG_MAX) {
-        poll_timer_wait(fo->next_bogus_packet_in - time_msec());
+        poll_timer_wait_until(fo->next_bogus_packet_in);
     }
 }
 
 void
 fail_open_flushed(struct fail_open *fo)
+    OVS_EXCLUDED(ofproto_mutex)
 {
-    int disconn_secs = rconn_failure_duration(fo->controller);
-    bool open = disconn_secs >= fo->trigger_duration;
+    int disconn_secs = connmgr_failure_duration(fo->connmgr);
+    bool open = disconn_secs >= trigger_duration(fo);
     if (open) {
-        union ofp_action action;
-        flow_t flow;
+        struct ofpbuf ofpacts;
+        struct match match;
 
         /* Set up a flow that matches every packet and directs them to
          * OFPP_NORMAL. */
-        memset(&action, 0, sizeof action);
-        action.type = htons(OFPAT_OUTPUT);
-        action.output.len = htons(sizeof action);
-        action.output.port = htons(OFPP_NORMAL);
-        memset(&flow, 0, sizeof flow);
-        ofproto_add_flow(fo->ofproto, &flow, OVSFW_ALL, FAIL_OPEN_PRIORITY,
-                         &action, 1, 0);
-    }
-}
+        ofpbuf_init(&ofpacts, OFPACT_OUTPUT_SIZE);
+        ofpact_put_OUTPUT(&ofpacts)->port = OFPP_NORMAL;
+        ofpact_pad(&ofpacts);
 
-static void
-fail_open_status_cb(struct status_reply *sr, void *fo_)
-{
-    struct fail_open *fo = fo_;
-    int cur_duration = rconn_failure_duration(fo->controller);
+        match_init_catchall(&match);
+        ofproto_add_flow(fo->ofproto, &match, FAIL_OPEN_PRIORITY,
+                         ofpbuf_data(&ofpacts), ofpbuf_size(&ofpacts));
 
-    status_reply_put(sr, "trigger-duration=%d", fo->trigger_duration);
-    status_reply_put(sr, "current-duration=%d", cur_duration);
-    status_reply_put(sr, "triggered=%s",
-                     cur_duration >= fo->trigger_duration ? "true" : "false");
+        ofpbuf_uninit(&ofpacts);
+    }
 }
 
+/* Creates and returns a new struct fail_open for 'ofproto' and 'mgr'. */
 struct fail_open *
-fail_open_create(struct ofproto *ofproto,
-                 int trigger_duration, struct switch_status *switch_status,
-                 struct rconn *controller)
+fail_open_create(struct ofproto *ofproto, struct connmgr *mgr)
 {
     struct fail_open *fo = xmalloc(sizeof *fo);
     fo->ofproto = ofproto;
-    fo->controller = controller;
-    fo->trigger_duration = trigger_duration;
+    fo->connmgr = mgr;
     fo->last_disconn_secs = 0;
-    fo->ss_cat = switch_status_register(switch_status, "fail-open",
-                                        fail_open_status_cb, fo);
     fo->next_bogus_packet_in = LLONG_MAX;
     fo->bogus_packet_counter = rconn_packet_counter_create();
     return fo;
 }
 
-void
-fail_open_set_trigger_duration(struct fail_open *fo, int trigger_duration)
-{
-    fo->trigger_duration = trigger_duration;
-}
-
+/* Destroys 'fo'. */
 void
 fail_open_destroy(struct fail_open *fo)
+    OVS_EXCLUDED(ofproto_mutex)
 {
     if (fo) {
-        fail_open_recover(fo);
-        /* We don't own fo->controller. */
-        switch_status_unregister(fo->ss_cat);
+        if (fail_open_is_active(fo)) {
+            fail_open_recover(fo);
+        }
+        /* We don't own fo->connmgr. */
         rconn_packet_counter_destroy(fo->bogus_packet_counter);
         free(fo);
     }