X-Git-Url: http://git.cascardo.eti.br/?a=blobdiff_plain;f=ofproto%2Ffail-open.c;h=a28acefdc9d0feaf4009a3dd7ac178db608cd8af;hb=a2b53dec11a6d001fd024ba8729de5c63bd2b6a1;hp=2a8fb955f53ef16a1d9a372594f37361dd18d6d1;hpb=ae412e7dd89489911a32c6723d4109c6d1de3a38;p=cascardo%2Fovs.git

diff --git a/ofproto/fail-open.c b/ofproto/fail-open.c
index 2a8fb955f..a28acefdc 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, 2015, 2016 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-util.h"
 #include "ofpbuf.h"
+#include "ofp-actions.h"
+#include "ofp-util.h"
 #include "ofproto.h"
+#include "ofproto-provider.h"
 #include "pktbuf.h"
+#include "dp-packet.h"
 #include "poll-loop.h"
 #include "rconn.h"
-#include "status.h"
 #include "timeval.h"
-#include "vconn.h"
-#include "vlog.h"
+#include "openvswitch/vconn.h"
+#include "openvswitch/vlog.h"
 
-VLOG_DEFINE_THIS_MODULE(fail_open)
+VLOG_DEFINE_THIS_MODULE(fail_open);
 
 /*
  * Fail-open mode.
@@ -69,12 +73,11 @@ VLOG_DEFINE_THIS_MODULE(fail_open)
 
 struct fail_open {
     struct ofproto *ofproto;
-    struct rconn **controllers;
-    size_t n_controllers;
+    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;
+    bool fail_open_active;
 };
 
 static void fail_open_recover(struct fail_open *);
@@ -84,7 +87,7 @@ static void fail_open_recover(struct fail_open *);
 static int
 trigger_duration(const struct fail_open *fo)
 {
-    if (!fo->n_controllers) {
+    if (!connmgr_has_controllers(fo->connmgr)) {
         /* Shouldn't ever arrive here, but if we do, never fail open. */
         return INT_MAX;
     } else {
@@ -101,38 +104,10 @@ trigger_duration(const struct fail_open *fo)
          *  - The third interval is the time allowed to reconnect after no
          *    response is received.
          */
-        int max_probe_interval;
-        size_t i;
-
-        max_probe_interval = 0;
-        for (i = 0; i < fo->n_controllers; i++) {
-            int probe_interval = rconn_get_probe_interval(fo->controllers[i]);
-            max_probe_interval = MAX(max_probe_interval, probe_interval);
-        }
-        return max_probe_interval * 3;
+        return connmgr_get_max_probe_interval(fo->connmgr) * 3;
     }
 }
 
-/* Returns the number of seconds for which all controllers have been
- * disconnected.  */
-static int
-failure_duration(const struct fail_open *fo)
-{
-    int min_failure_duration;
-    size_t i;
-
-    if (!fo->n_controllers) {
-        return 0;
-    }
-
-    min_failure_duration = INT_MAX;
-    for (i = 0; i < fo->n_controllers; i++) {
-        int failure_duration = rconn_failure_duration(fo->controllers[i]);
-        min_failure_duration = MIN(min_failure_duration, failure_duration);
-    }
-    return min_failure_duration;
-}
-
 /* Returns true if 'fo' is currently in fail-open mode, otherwise false. */
 bool
 fail_open_is_active(const struct fail_open *fo)
@@ -140,72 +115,42 @@ fail_open_is_active(const struct fail_open *fo)
     return fo->last_disconn_secs != 0;
 }
 
-/* Returns true if at least one controller is connected (regardless of whether
- * those controllers are believed to have authenticated and accepted this
- * switch), false if none of them are connected. */
-static bool
-any_controller_is_connected(const struct fail_open *fo)
-{
-    size_t i;
-
-    for (i = 0; i < fo->n_controllers; i++) {
-        if (rconn_is_connected(fo->controllers[i])) {
-            return true;
-        }
-    }
-    return false;
-}
-
-/* Returns true if at least one controller is believed to have authenticated
- * and accepted this switch, false otherwise. */
-static bool
-any_controller_is_admitted(const struct fail_open *fo)
-{
-    size_t i;
-
-    for (i = 0; i < fo->n_controllers; i++) {
-        if (rconn_is_admitted(fo->controllers[i])) {
-            return true;
-        }
-    }
-    return false;
-}
-
-static void
-send_bogus_packet_in(struct fail_open *fo, struct rconn *rconn)
-{
-    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);
-
-    /* Send. */
-    rconn_send_with_limit(rconn, opi, fo->bogus_packet_counter, 1);
-}
-
 static void
 send_bogus_packet_ins(struct fail_open *fo)
 {
-    size_t i;
-
-    for (i = 0; i < fo->n_controllers; i++) {
-        if (rconn_is_connected(fo->controllers[i])) {
-            send_bogus_packet_in(fo, fo->controllers[i]);
+    struct eth_addr mac;
+    struct dp_packet b;
+
+    dp_packet_init(&b, 128);
+    eth_addr_nicira_random(&mac);
+    compose_rarp(&b, mac);
+
+    struct ofproto_async_msg am = {
+        .oam = OAM_PACKET_IN,
+        .pin = {
+            .up = {
+                .packet = dp_packet_data(&b),
+                .len = dp_packet_size(&b),
+                .flow_metadata = MATCH_CATCHALL_INITIALIZER,
+                .flow_metadata.flow.in_port.ofp_port = OFPP_LOCAL,
+                .flow_metadata.wc.masks.in_port.ofp_port
+                    = u16_to_ofp(UINT16_MAX),
+                .reason = OFPR_NO_MATCH,
+                .cookie = OVS_BE64_MAX,
+            },
+            .max_len = UINT16_MAX,
         }
-    }
+    };
+    connmgr_send_async_msg(fo->connmgr, &am);
+
+    dp_packet_uninit(&b);
 }
 
 /* Enter fail-open mode if we should be in it. */
 void
 fail_open_run(struct fail_open *fo)
 {
-    int disconn_secs = failure_duration(fo);
+    int disconn_secs = connmgr_failure_duration(fo->connmgr);
 
     /* Enter fail-open mode if 'fo' is not in it but should be.  */
     if (disconn_secs >= trigger_duration(fo)) {
@@ -228,7 +173,7 @@ 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 (any_controller_is_connected(fo)) {
+        if (connmgr_is_any_controller_connected(fo->connmgr)) {
             bool expired = time_msec() >= fo->next_bogus_packet_in;
             if (expired) {
                 send_bogus_packet_ins(fo);
@@ -247,25 +192,26 @@ 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 (any_controller_is_admitted(fo)) {
+    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)) {
-        struct flow 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
@@ -278,83 +224,60 @@ fail_open_wait(struct fail_open *fo)
 
 void
 fail_open_flushed(struct fail_open *fo)
+    OVS_EXCLUDED(ofproto_mutex)
 {
-    int disconn_secs = failure_duration(fo);
+    int disconn_secs = connmgr_failure_duration(fo->connmgr);
     bool open = disconn_secs >= trigger_duration(fo);
     if (open) {
-        union ofp_action action;
-        struct flow 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;
+
+        match_init_catchall(&match);
+        ofproto_add_flow(fo->ofproto, &match, FAIL_OPEN_PRIORITY,
+                         ofpacts.data, ofpacts.size);
+
+        ofpbuf_uninit(&ofpacts);
     }
+    fo->fail_open_active = open;
 }
 
-static void
-fail_open_status_cb(struct status_reply *sr, void *fo_)
+/* Returns the number of fail-open rules currently installed in the flow
+ * table. */
+int
+fail_open_count_rules(const struct fail_open *fo)
 {
-    struct fail_open *fo = fo_;
-    int cur_duration = failure_duration(fo);
-    int trigger = trigger_duration(fo);
-
-    status_reply_put(sr, "trigger-duration=%d", trigger);
-    status_reply_put(sr, "current-duration=%d", cur_duration);
-    status_reply_put(sr, "triggered=%s",
-                     cur_duration >= trigger ? "true" : "false");
+    return fo->fail_open_active != 0;
 }
 
-/* Creates and returns a new struct fail_open for 'ofproto', registering switch
- * status with 'switch_status'.
- *
- * The caller should register its set of controllers with
- * fail_open_set_controllers().  (There should be at least one controller,
- * otherwise there isn't any point in having the struct fail_open around.) */
+/* Creates and returns a new struct fail_open for 'ofproto' and 'mgr'. */
 struct fail_open *
-fail_open_create(struct ofproto *ofproto, struct switch_status *switch_status)
+fail_open_create(struct ofproto *ofproto, struct connmgr *mgr)
 {
     struct fail_open *fo = xmalloc(sizeof *fo);
     fo->ofproto = ofproto;
-    fo->controllers = NULL;
-    fo->n_controllers = 0;
+    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();
+    fo->fail_open_active = false;
     return fo;
 }
 
-/* Registers the 'n' rconns in 'rconns' as connections to the controller for
- * 'fo'.  The caller must ensure that all of the rconns remain valid until 'fo'
- * is destroyed or a new set is registered in a subsequent call.
- *
- * Takes ownership of the 'rconns' array, but not of the rconns that it points
- * to (of which the caller retains ownership). */
-void
-fail_open_set_controllers(struct fail_open *fo,
-                          struct rconn **rconns, size_t n)
-{
-    free(fo->controllers);
-    fo->controllers = rconns;
-    fo->n_controllers = n;
-}
-
 /* Destroys 'fo'. */
 void
 fail_open_destroy(struct fail_open *fo)
+    OVS_EXCLUDED(ofproto_mutex)
 {
     if (fo) {
-        fail_open_recover(fo);
-        free(fo->controllers);
-        /* We don't own the rconns behind fo->controllers. */
-        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);
     }