Implement Openflow 1.4 Vacancy Events for OFPT_TABLE_MOD.
[cascardo/ovs.git] / utilities / ovs-ofctl.c
index 566a6b4..bc37e77 100644 (file)
@@ -130,6 +130,8 @@ main(int argc, char *argv[])
     fatal_ignore_sigpipe();
     ctx.argc = argc - optind;
     ctx.argv = argv + optind;
+
+    daemon_become_new_user(false);
     ovs_cmdl_run_command(&ctx, get_all_commands());
     return 0;
 }
@@ -310,6 +312,9 @@ parse_options(int argc, char *argv[])
         /* Add implicit allowance for OpenFlow 1.4. */
         add_allowed_ofp_versions(ofputil_protocols_to_version_bitmap(
                                      OFPUTIL_P_OF14_OXM));
+        /* Remove all prior versions. */
+        mask_allowed_ofp_versions(ofputil_protocols_to_version_bitmap(
+                                     OFPUTIL_P_OF14_UP));
     }
     versions = get_allowed_ofp_versions();
     version_protocols = ofputil_protocols_from_version_bitmap(versions);
@@ -342,7 +347,7 @@ usage(void)
            "  mod-port SWITCH IFACE ACT   modify port behavior\n"
            "  mod-table SWITCH MOD        modify flow table behavior\n"
            "      OF1.1/1.2 MOD: controller, continue, drop\n"
-           "      OF1.4+ MOD: evict, noevict\n"
+           "      OF1.4+ MOD: evict, noevict, vacancy:low,high, novacancy\n"
            "  get-frags SWITCH            print fragment handling behavior\n"
            "  set-frags SWITCH FRAG_MODE  set fragment handling behavior\n"
            "      FRAG_MODE: normal, drop, reassemble, nx-match\n"
@@ -731,8 +736,72 @@ ofctl_dump_table_features(struct ovs_cmdl_context *ctx)
 
     open_vconn(ctx->argv[1], &vconn);
     request = ofputil_encode_table_features_request(vconn_get_version(vconn));
-    if (request) {
-        dump_stats_transaction(vconn, request);
+
+    /* The following is similar to dump_trivial_stats_transaction(), but it
+     * maintains the previous 'ofputil_table_features' from one stats reply
+     * message to the next, which allows duplication to be eliminated in the
+     * output across messages.  Otherwise the output is much larger and harder
+     * to read, because only 17 or so ofputil_table_features elements fit in a
+     * single 64 kB OpenFlow message and therefore you get a ton of repetition
+     * (every 17th element is printed in full instead of abbreviated). */
+
+    const struct ofp_header *request_oh = request->data;
+    ovs_be32 send_xid = request_oh->xid;
+    bool done = false;
+
+    struct ofputil_table_features prev;
+    int n = 0;
+
+    send_openflow_buffer(vconn, request);
+    while (!done) {
+        ovs_be32 recv_xid;
+        struct ofpbuf *reply;
+
+        run(vconn_recv_block(vconn, &reply), "OpenFlow packet receive failed");
+        recv_xid = ((struct ofp_header *) reply->data)->xid;
+        if (send_xid == recv_xid) {
+            enum ofptype type;
+            enum ofperr error;
+            error = ofptype_decode(&type, reply->data);
+            if (error) {
+                ovs_fatal(0, "decode error: %s", ofperr_get_name(error));
+            } else if (type == OFPTYPE_ERROR) {
+                ofp_print(stdout, reply->data, reply->size, verbosity + 1);
+                done = true;
+            } else if (type == OFPTYPE_TABLE_FEATURES_STATS_REPLY) {
+                done = !ofpmp_more(reply->data);
+                for (;;) {
+                    struct ofputil_table_features tf;
+                    int retval;
+
+                    retval = ofputil_decode_table_features(reply, &tf, true);
+                    if (retval) {
+                        if (retval != EOF) {
+                            ovs_fatal(0, "decode error: %s",
+                                      ofperr_get_name(retval));
+                        }
+                        break;
+                    }
+
+                    struct ds s = DS_EMPTY_INITIALIZER;
+                    ofp_print_table_features(&s, &tf, n ? &prev : NULL,
+                                             NULL, NULL);
+                    puts(ds_cstr(&s));
+                    ds_destroy(&s);
+
+                    prev = tf;
+                    n++;
+                }
+            } else {
+                ovs_fatal(0, "received bad reply: %s",
+                          ofp_to_string(reply->data, reply->size,
+                                        verbosity + 1));
+            }
+        } else {
+            VLOG_DBG("received reply with xid %08"PRIx32" "
+                     "!= expected %08"PRIx32, recv_xid, send_xid);
+        }
+        ofpbuf_delete(reply);
     }
 
     vconn_close(vconn);
@@ -1547,7 +1616,7 @@ monitor_vconn(struct vconn *vconn, bool reply_to_echo_requests)
     int error;
 
     daemon_save_fd(STDERR_FILENO);
-    daemonize_start();
+    daemonize_start(false);
     error = unixctl_server_create(unixctl_path, &server);
     if (error) {
         ovs_fatal(error, "failed to create unixctl server");
@@ -1835,7 +1904,7 @@ ofctl_mod_port(struct ovs_cmdl_context *ctx)
     fetch_ofputil_phy_port(ctx->argv[1], ctx->argv[2], &pp);
 
     pm.port_no = pp.port_no;
-    memcpy(pm.hw_addr, pp.hw_addr, ETH_ADDR_LEN);
+    pm.hw_addr = pp.hw_addr;
     pm.config = 0;
     pm.mask = 0;
     pm.advertise = 0;
@@ -1865,6 +1934,70 @@ found:
     vconn_close(vconn);
 }
 
+/* This function uses OFPMP14_TABLE_DESC request to get the current
+ * table configuration from switch. The function then modifies
+ * only that table-config property, which has been requested. */
+static void
+fetch_table_desc(struct vconn *vconn, struct ofputil_table_mod *tm,
+                 struct ofputil_table_desc *td)
+{
+    struct ofpbuf *request;
+    ovs_be32 send_xid;
+    bool done = false;
+    bool found = false;
+
+    request = ofputil_encode_table_desc_request(vconn_get_version(vconn));
+    send_xid = ((struct ofp_header *) request->data)->xid;
+    send_openflow_buffer(vconn, request);
+    while (!done) {
+        ovs_be32 recv_xid;
+        struct ofpbuf *reply;
+
+        run(vconn_recv_block(vconn, &reply), "OpenFlow packet receive failed");
+        recv_xid = ((struct ofp_header *) reply->data)->xid;
+        if (send_xid == recv_xid) {
+            struct ofp_header *oh = reply->data;
+            enum ofptype type;
+            struct ofpbuf b;
+            uint16_t flags;
+
+            ofpbuf_use_const(&b, oh, ntohs(oh->length));
+            if (ofptype_pull(&type, &b)
+                || type != OFPTYPE_TABLE_DESC_REPLY) {
+                ovs_fatal(0, "received bad reply: %s",
+                          ofp_to_string(reply->data, reply->size,
+                                        verbosity + 1));
+            }
+            flags = ofpmp_flags(oh);
+            done = !(flags & OFPSF_REPLY_MORE);
+            if (found) {
+                /* We've already found the table desc consisting of current
+                 * table configuration, but we need to drain the queue of
+                 * any other replies for this request. */
+                continue;
+            }
+            while (!ofputil_decode_table_desc(&b, td, oh->version)) {
+                if (td->table_id == tm->table_id) {
+                    found = true;
+                    break;
+                }
+            }
+        } else {
+            VLOG_DBG("received reply with xid %08"PRIx32" "
+                     "!= expected %08"PRIx32, recv_xid, send_xid);
+        }
+        ofpbuf_delete(reply);
+    }
+    if (tm->eviction != OFPUTIL_TABLE_EVICTION_DEFAULT) {
+        tm->vacancy = td->vacancy;
+        tm->table_vacancy.vacancy_down = td->table_vacancy.vacancy_down;
+        tm->table_vacancy.vacancy_up = td->table_vacancy.vacancy_up;
+    } else if (tm->vacancy != OFPUTIL_TABLE_VACANCY_DEFAULT) {
+        tm->eviction = td->eviction;
+        tm->eviction_flags = td->eviction_flags;
+    }
+}
+
 static void
 ofctl_mod_table(struct ovs_cmdl_context *ctx)
 {
@@ -1872,6 +2005,7 @@ ofctl_mod_table(struct ovs_cmdl_context *ctx)
     struct ofputil_table_mod tm;
     struct vconn *vconn;
     char *error;
+    int i;
 
     error = parse_ofp_table_mod(&tm, ctx->argv[2], ctx->argv[3],
                                 &usable_versions);
@@ -1882,15 +2016,36 @@ ofctl_mod_table(struct ovs_cmdl_context *ctx)
     uint32_t allowed_versions = get_allowed_ofp_versions();
     if (!(allowed_versions & usable_versions)) {
         struct ds versions = DS_EMPTY_INITIALIZER;
-        ofputil_format_version_bitmap_names(&versions, allowed_versions);
+        ofputil_format_version_bitmap_names(&versions, usable_versions);
         ovs_fatal(0, "table_mod '%s' requires one of the OpenFlow "
-                  "versions %s but none is enabled (use -O)",
+                  "versions %s",
                   ctx->argv[3], ds_cstr(&versions));
     }
     mask_allowed_ofp_versions(usable_versions);
-
     enum ofputil_protocol protocol = open_vconn(ctx->argv[1], &vconn);
-    transact_noreply(vconn, ofputil_encode_table_mod(&tm, protocol));
+
+    /* For OpenFlow 1.4+, ovs-ofctl mod-table should not affect table-config
+     * properties that the user didn't ask to change, so it is necessary to
+     * restore the current configuration of table-config parameters using
+     * OFPMP14_TABLE_DESC request. */
+    if ((allowed_versions & (1u << OFP14_VERSION)) ||
+        (allowed_versions & (1u << OFP15_VERSION))) {
+        struct ofputil_table_desc td;
+
+        if (tm.table_id == OFPTT_ALL) {
+            for (i = 0; i < OFPTT_MAX; i++) {
+                tm.table_id = i;
+                fetch_table_desc(vconn, &tm, &td);
+                transact_noreply(vconn,
+                                 ofputil_encode_table_mod(&tm, protocol));
+            }
+        } else {
+            fetch_table_desc(vconn, &tm, &td);
+            transact_noreply(vconn, ofputil_encode_table_mod(&tm, protocol));
+        }
+    } else {
+        transact_noreply(vconn, ofputil_encode_table_mod(&tm, protocol));
+    }
     vconn_close(vconn);
 }
 
@@ -2314,7 +2469,7 @@ ofctl_dump_group_desc(struct ovs_cmdl_context *ctx)
     open_vconn(ctx->argv[1], &vconn);
 
     if (ctx->argc < 3 || !ofputil_group_from_string(ctx->argv[2], &group_id)) {
-        group_id = OFPG11_ALL;
+        group_id = OFPG_ALL;
     }
 
     request = ofputil_encode_group_desc_request(vconn_get_version(vconn),
@@ -2521,10 +2676,11 @@ fte_insert(struct classifier *cls, const struct match *match,
     struct fte *old, *fte;
 
     fte = xzalloc(sizeof *fte);
-    cls_rule_init(&fte->rule, match, priority, CLS_MIN_VERSION);
+    cls_rule_init(&fte->rule, match, priority);
     fte->versions[index] = version;
 
-    old = fte_from_cls_rule(classifier_replace(cls, &fte->rule, NULL, 0));
+    old = fte_from_cls_rule(classifier_replace(cls, &fte->rule,
+                                               CLS_MIN_VERSION, NULL, 0));
     if (old) {
         fte->versions[!index] = old->versions[!index];
         old->versions[!index] = NULL;
@@ -2658,6 +2814,7 @@ read_flows_from_switch(struct vconn *vconn,
     fsr.aggregate = false;
     match_init_catchall(&fsr.match);
     fsr.out_port = OFPP_ANY;
+    fsr.out_group = OFPG_ANY;
     fsr.table_id = 0xff;
     fsr.cookie = fsr.cookie_mask = htonll(0);
     request = ofputil_encode_flow_stats_request(&fsr, protocol);
@@ -2706,6 +2863,7 @@ fte_make_flow_mod(const struct fte *fte, int index, uint16_t command,
     fm.importance = version->importance;
     fm.buffer_id = UINT32_MAX;
     fm.out_port = OFPP_ANY;
+    fm.out_group = OFPG_ANY;
     fm.flags = version->flags;
     if (command == OFPFC_ADD || command == OFPFC_MODIFY ||
         command == OFPFC_MODIFY_STRICT) {
@@ -2886,9 +3044,9 @@ ofctl_meter_request__(const char *bridge, const char *str,
 
     protocol = open_vconn_for_flow_mod(bridge, &vconn, usable_protocols);
     version = ofputil_protocol_to_ofp_version(protocol);
-    transact_noreply(vconn, ofputil_encode_meter_request(version,
-                                                         type,
-                                                         mm.meter.meter_id));
+    dump_stats_transaction(vconn,
+                           ofputil_encode_meter_request(version, type,
+                                                        mm.meter.meter_id));
     vconn_close(vconn);
 }