datapath: Don't drop MTU-sized VLAN packets from userspace

[sliver-openvswitch.git] / lib / dpif.c

diff --git a/lib/dpif.c b/lib/dpif.c
index 73ad5df..4475913 100644 (file)
--- a/lib/dpif.c
+++ b/lib/dpif.c
@@ -1,17 +1,17 @@
 /*
  * Copyright (c) 2008, 2009 Nicira Networks.
  *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
  *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 #include <config.h>
@@ -43,6 +43,7 @@
 #include "ofpbuf.h"
 #include "packets.h"
 #include "poll-loop.h"
+#include "svec.h"
 #include "util.h"
 #include "valgrind.h"
 
@@ -64,6 +65,35 @@ static int open_by_minor(unsigned int minor, struct dpif *);
 static int make_openvswitch_device(unsigned int minor, char **fnp);
 static void check_rw_odp_flow(struct odp_flow *);
 
+
+/* Clears 'all_dps' and enumerates the names of all known created
+ * datapaths into it.  Returns 0 if successful, otherwise a positive 
+ * errno value. */
+int
+dp_enumerate(struct svec *all_dps)
+{
+    int error;
+    int i;
+
+    svec_clear(all_dps);
+    error = 0;
+    for (i = 0; i < ODP_MAX; i++) {
+        struct dpif dpif;
+        char devname[16];
+        int retval;
+
+        sprintf(devname, "dp%d", i);
+        retval = dpif_open(devname, &dpif);
+        if (!retval) {
+            svec_add(all_dps, devname);
+            dpif_close(&dpif);
+        } else if (retval != ENODEV && !error) {
+            error = retval;
+        }
+    }
+    return error;
+}
+
 int
 dpif_open(const char *name, struct dpif *dpif)
 {
@@ -322,6 +352,28 @@ dpif_port_query_by_name(const struct dpif *dpif, const char *devname,
     }
 }
 
+/* Looks up port number 'port_no' in 'dpif'.  On success, returns 0 and copies
+ * the port's name into the 'name_size' bytes in 'name', ensuring that the
+ * result is null-terminated.  On failure, returns a positive errno value and
+ * makes 'name' the empty string. */
+int
+dpif_port_get_name(struct dpif *dpif, uint16_t port_no,
+                   char *name, size_t name_size)
+{
+    struct odp_port port;
+    int error;
+
+    assert(name_size > 0);
+
+    error = dpif_port_query_by_number(dpif, port_no, &port);
+    if (!error) {
+        ovs_strlcpy(name, port.devname, name_size);
+    } else {
+        *name = '\0';
+    }
+    return error;
+}
+
 int
 dpif_port_list(const struct dpif *dpif,
                struct odp_port **ports, size_t *n_ports)