vswitch: Remove restriction on datapath names.

Commit f4b96c92c "vswitch: Disallow bridges named "dpN" or "nl:N"" disabled
naming bridges "dpN" because the vswitchd code made the bad assumption that
the bridge's local port has the same name as the bridge, which was not
true (at the time) for bridges named dpN.  Now that assumption has been
eliminated, so this commit eliminates the restriction too.

This change is also a cleanup in that it eliminates one form of the
vswitch's dependence on specifics of the dpif implementation.

diff --git a/vswitchd/bridge.c b/vswitchd/bridge.c
index 32647ea..00cffbc 100644 (file)
--- a/vswitchd/bridge.c
+++ b/vswitchd/bridge.c
@@ -351,32 +351,19 @@ bridge_configure_ssl(void)
 void
 bridge_reconfigure(void)
 {
-    struct svec old_br, new_br, raw_new_br;
+    struct svec old_br, new_br;
     struct bridge *br, *next;
     size_t i, j;
 
     COVERAGE_INC(bridge_reconfigure);
 
-    /* Collect old bridges. */
+    /* Collect old and new bridges. */
     svec_init(&old_br);
+    svec_init(&new_br);
     LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
         svec_add(&old_br, br->name);
     }
-
-    /* Collect new bridges. */
-    svec_init(&raw_new_br);
-    cfg_get_subsections(&raw_new_br, "bridge");
-    svec_init(&new_br);
-    for (i = 0; i < raw_new_br.n; i++) {
-        const char *name = raw_new_br.names[i];
-        if (!strncmp(name, "dp", 2) && isdigit(name[2])) {
-            VLOG_ERR("%s is not a valid bridge name (bridges may not be "
-                     "named \"dp\" followed by a digit)", name);
-        } else {
-            svec_add(&new_br, name);
-        }
-    }
-    svec_destroy(&raw_new_br);
+    cfg_get_subsections(&new_br, "bridge");
 
     /* Get rid of deleted bridges and add new bridges. */
     svec_sort(&old_br);
@@ -793,7 +780,7 @@ bridge_create(const char *name)
     br = xcalloc(1, sizeof *br);
 
     error = dpif_create(name, &br->dpif);
-    if (error == EEXIST) {
+    if (error == EEXIST || error == EBUSY) {
         error = dpif_open(name, &br->dpif);
         if (error) {
             VLOG_ERR("datapath %s already exists but cannot be opened: %s",

diff --git a/vswitchd/ovs-vswitchd.conf.5.in b/vswitchd/ovs-vswitchd.conf.5.in
index 5483ad5..d82a08a 100644 (file)
--- a/vswitchd/ovs-vswitchd.conf.5.in
+++ b/vswitchd/ovs-vswitchd.conf.5.in
@@ -50,8 +50,7 @@ configure \fBovs\-vswitchd\fR.
 .SS "Bridge Configuration"
 A bridge (switch) with a given \fIname\fR is configured by specifying
 the names of its network devices as values for key
-\fBbridge.\fIname\fB.port\fR.  (The specified \fIname\fR may not begin
-with \fBdp\fR followed by a digit.)
+\fBbridge.\fIname\fB.port\fR.
 .PP
 The names given on \fBbridge.\fIname\fB.port\fR must be the names of
 existing network devices, except for ``internal ports.''  An internal