X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fofp-msgs.c;h=092741fd7a4e84dc89a81f84db26156288355480;hb=c37c03826ce05e0d8262180b102923574eea01eb;hp=057422886976d3cfd1cc5fd245ccf0b24820931b;hpb=e032c08628186e3bf351fc9e111cf919d0d06073;p=sliver-openvswitch.git

diff --git a/lib/ofp-msgs.c b/lib/ofp-msgs.c
index 057422886..092741fd7 100644
--- a/lib/ofp-msgs.c
+++ b/lib/ofp-msgs.c
@@ -23,6 +23,7 @@
 #include "ofpbuf.h"
 #include "openflow/nicira-ext.h"
 #include "openflow/openflow.h"
+#include "ovs-thread.h"
 #include "vlog.h"
 
 VLOG_DEFINE_THIS_MODULE(ofp_msgs);
@@ -109,8 +110,11 @@ static enum ofperr ofpraw_from_ofphdrs(enum ofpraw *, const struct ofphdrs *);
 static ovs_be32
 alloc_xid(void)
 {
-    static uint32_t next_xid = 1;
-    return htonl(next_xid++);
+    static atomic_uint32_t next_xid = ATOMIC_VAR_INIT(1);
+    uint32_t xid;
+
+    atomic_add(&next_xid, 1, &xid);
+    return htonl(xid);
 }
 
 static uint32_t
@@ -256,22 +260,50 @@ ofphdrs_decode_assert(struct ofphdrs *hdrs,
 }
 
 static bool
-ofphdrs_is_stat(const struct ofphdrs *hdrs)
+ofp_is_stat_request(enum ofp_version version, uint8_t type)
 {
-    switch ((enum ofp_version) hdrs->version) {
+    switch (version) {
     case OFP10_VERSION:
-        return (hdrs->type == OFPT10_STATS_REQUEST ||
-                hdrs->type == OFPT10_STATS_REPLY);
+        return type == OFPT10_STATS_REQUEST;
     case OFP11_VERSION:
     case OFP12_VERSION:
     case OFP13_VERSION:
-        return (hdrs->type == OFPT11_STATS_REQUEST ||
-                hdrs->type == OFPT11_STATS_REPLY);
+    case OFP14_VERSION:
+        return type == OFPT11_STATS_REQUEST;
     }
 
     return false;
 }
 
+static bool
+ofp_is_stat_reply(enum ofp_version version, uint8_t type)
+{
+    switch (version) {
+    case OFP10_VERSION:
+        return type == OFPT10_STATS_REPLY;
+    case OFP11_VERSION:
+    case OFP12_VERSION:
+    case OFP13_VERSION:
+    case OFP14_VERSION:
+        return type == OFPT11_STATS_REPLY;
+    }
+
+    return false;
+}
+
+static bool
+ofp_is_stat(enum ofp_version version, uint8_t type)
+{
+    return (ofp_is_stat_request(version, type) ||
+            ofp_is_stat_reply(version, type));
+}
+
+static bool
+ofphdrs_is_stat(const struct ofphdrs *hdrs)
+{
+    return ofp_is_stat(hdrs->version, hdrs->type);
+}
+
 size_t
 ofphdrs_len(const struct ofphdrs *hdrs)
 {
@@ -292,6 +324,7 @@ ofphdrs_len(const struct ofphdrs *hdrs)
     case OFP11_VERSION:
     case OFP12_VERSION:
     case OFP13_VERSION:
+    case OFP14_VERSION:
         if (hdrs->type == OFPT11_STATS_REQUEST ||
             hdrs->type == OFPT11_STATS_REPLY) {
             return (hdrs->stat == OFPST_VENDOR
@@ -320,6 +353,23 @@ ofpraw_decode(enum ofpraw *raw, const struct ofp_header *oh)
     return ofpraw_pull(raw, &msg);
 }
 
+/* Does the same job as ofpraw_decode(), except that it assert-fails if
+ * ofpraw_decode() would have reported an error.  Thus, it's able to use the
+ * return value for the OFPRAW_* message type instead of an error code.
+ *
+ * (It only makes sense to use this function if you previously called
+ * ofpraw_decode() on the message and thus know that it's OK.) */
+enum ofpraw
+ofpraw_decode_assert(const struct ofp_header *oh)
+{
+    enum ofperr error;
+    enum ofpraw raw;
+
+    error = ofpraw_decode(&raw, oh);
+    ovs_assert(!error);
+    return raw;
+}
+
 /* Determines the OFPRAW_* type of the OpenFlow message in 'msg', which starts
  * at 'msg->data' and has length 'msg->size' bytes.  On success, returns 0 and
  * stores the type into '*rawp'.  On failure, returns an OFPERR_* error code
@@ -646,7 +696,7 @@ ofpraw_put__(enum ofpraw raw, uint8_t version, ovs_be32 xid,
                 nsm->subtype = htonl(hdrs->subtype);
                 memset(nsm->pad, 0, sizeof nsm->pad);
             } else {
-                NOT_REACHED();
+                OVS_NOT_REACHED();
             }
         }
     } else if (version != OFP10_VERSION
@@ -667,7 +717,7 @@ ofpraw_put__(enum ofpraw raw, uint8_t version, ovs_be32 xid,
 
                 nsm->subtype = htonl(hdrs->subtype);
             } else {
-                NOT_REACHED();
+                OVS_NOT_REACHED();
             }
         }
     }
@@ -706,11 +756,12 @@ ofpraw_stats_request_to_reply(enum ofpraw raw, uint8_t version)
     case OFP11_VERSION:
     case OFP12_VERSION:
     case OFP13_VERSION:
+    case OFP14_VERSION:
         ovs_assert(hdrs.type == OFPT11_STATS_REQUEST);
         hdrs.type = OFPT11_STATS_REPLY;
         break;
     default:
-        NOT_REACHED();
+        OVS_NOT_REACHED();
     }
 
     error = ofpraw_from_ofphdrs(&reply_raw, &hdrs);
@@ -790,6 +841,13 @@ ofpmsg_body(const struct ofp_header *oh)
     ofphdrs_decode_assert(&hdrs, oh, ntohs(oh->length));
     return (const uint8_t *) oh + ofphdrs_len(&hdrs);
 }
+
+/* Return if it's a stat/multipart (OFPST) request message. */
+bool
+ofpmsg_is_stat_request(const struct ofp_header *oh)
+{
+    return ofp_is_stat_request(oh->version, oh->type);
+}
 
 static ovs_be16 *ofpmp_flags__(const struct ofp_header *);
 
@@ -834,6 +892,8 @@ ofpmp_reserve(struct list *replies, size_t len)
 
         next = ofpbuf_new(MAX(1024, hdrs_len + len));
         ofpbuf_put(next, msg->data, hdrs_len);
+        next->l2 = next->data;
+        next->l3 = ofpbuf_tail(next);
         list_push_back(replies, &next->list_node);
 
         *ofpmp_flags__(msg->data) |= htons(OFPSF_REPLY_MORE);
@@ -883,9 +943,10 @@ ofpmp_flags__(const struct ofp_header *oh)
     case OFP11_VERSION:
     case OFP12_VERSION:
     case OFP13_VERSION:
+    case OFP14_VERSION:
         return &((struct ofp11_stats_msg *) oh)->flags;
     default:
-        NOT_REACHED();
+        OVS_NOT_REACHED();
     }
 }
 
@@ -969,9 +1030,10 @@ ofpraw_from_ofphdrs(enum ofpraw *raw, const struct ofphdrs *hdrs)
 static void
 ofpmsgs_init(void)
 {
+    static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
     const struct raw_info *info;
 
-    if (raw_instance_map.buckets) {
+    if (!ovsthread_once_start(&once)) {
         return;
     }
 
@@ -989,4 +1051,6 @@ ofpmsgs_init(void)
                         ofphdrs_hash(&inst->hdrs));
         }
     }
+
+    ovsthread_once_done(&once);
 }