ofproto-dpif: Fix use-after-free error in handle_miss_upcalls().
[sliver-openvswitch.git] / lib / odp-util.c
index e2e094e..ffb486e 100644 (file)
@@ -189,9 +189,7 @@ format_odp_userspace_action(struct ds *ds, const struct nlattr *attr)
 
         memcpy(&cookie, &userdata, sizeof cookie);
 
-        if (cookie.type == USER_ACTION_COOKIE_CONTROLLER) {
-            ds_put_format(ds, ",controller,length=%"PRIu32, cookie.data);
-        } else if (cookie.type == USER_ACTION_COOKIE_SFLOW) {
+        if (cookie.type == USER_ACTION_COOKIE_SFLOW) {
             ds_put_format(ds, ",sFlow,n_output=%"PRIu8","
                           "vid=%"PRIu16",pcp=%"PRIu8",ifindex=%"PRIu32,
                           cookie.n_output, vlan_tci_to_vid(cookie.vlan_tci),
@@ -328,7 +326,6 @@ parse_odp_action(const char *s, const struct shash *port_names,
 
     {
         unsigned long long int pid;
-        unsigned long long int length;
         unsigned long long int ifindex;
         char userdata_s[32];
         int n_output;
@@ -338,16 +335,6 @@ parse_odp_action(const char *s, const struct shash *port_names,
         if (sscanf(s, "userspace(pid=%lli)%n", &pid, &n) > 0 && n > 0) {
             odp_put_userspace_action(pid, NULL, actions);
             return n;
-        } else if (sscanf(s, "userspace(pid=%lli,controller,length=%lli)%n",
-                          &pid, &length, &n) > 0 && n > 0) {
-            struct user_action_cookie cookie;
-
-            cookie.type = USER_ACTION_COOKIE_CONTROLLER;
-            cookie.n_output = 0;
-            cookie.vlan_tci = htons(0);
-            cookie.data = length;
-            odp_put_userspace_action(pid, &cookie, actions);
-            return n;
         } else if (sscanf(s, "userspace(pid=%lli,sFlow,n_output=%i,vid=%i,"
                           "pcp=%i,ifindex=%lli)%n", &pid, &n_output,
                           &vid, &pcp, &ifindex, &n) > 0 && n > 0) {
@@ -1149,11 +1136,11 @@ odp_flow_key_from_string(const char *s, const struct shash *port_names,
 }
 
 static uint8_t
-ovs_to_odp_frag(uint8_t ovs_frag)
+ovs_to_odp_frag(uint8_t nw_frag)
 {
-    return (ovs_frag & FLOW_NW_FRAG_LATER ? OVS_FRAG_TYPE_LATER
-            : ovs_frag & FLOW_NW_FRAG_ANY ? OVS_FRAG_TYPE_FIRST
-            : OVS_FRAG_TYPE_NONE);
+    return (nw_frag == 0 ? OVS_FRAG_TYPE_NONE
+          : nw_frag == FLOW_NW_FRAG_ANY ? OVS_FRAG_TYPE_FIRST
+          : OVS_FRAG_TYPE_LATER);
 }
 
 /* Appends a representation of 'flow' as OVS_KEY_ATTR_* attributes to 'buf'. */
@@ -1163,8 +1150,8 @@ odp_flow_key_from_flow(struct ofpbuf *buf, const struct flow *flow)
     struct ovs_key_ethernet *eth_key;
     size_t encap;
 
-    if (flow->priority) {
-        nl_msg_put_u32(buf, OVS_KEY_ATTR_PRIORITY, flow->priority);
+    if (flow->skb_priority) {
+        nl_msg_put_u32(buf, OVS_KEY_ATTR_PRIORITY, flow->skb_priority);
     }
 
     if (flow->tun_id != htonll(0)) {
@@ -1655,7 +1642,7 @@ odp_flow_key_to_flow(const struct nlattr *key, size_t key_len,
 
     /* Metadata. */
     if (present_attrs & (UINT64_C(1) << OVS_KEY_ATTR_PRIORITY)) {
-        flow->priority = nl_attr_get_u32(attrs[OVS_KEY_ATTR_PRIORITY]);
+        flow->skb_priority = nl_attr_get_u32(attrs[OVS_KEY_ATTR_PRIORITY]);
         expected_attrs |= UINT64_C(1) << OVS_KEY_ATTR_PRIORITY;
     }
 
@@ -1721,3 +1708,203 @@ odp_put_userspace_action(uint32_t pid, const struct user_action_cookie *cookie,
 
     return cookie ? odp_actions->size - NLA_ALIGN(sizeof *cookie) : 0;
 }
+\f
+/* The commit_odp_actions() function and its helpers. */
+
+static void
+commit_set_action(struct ofpbuf *odp_actions, enum ovs_key_attr key_type,
+                  const void *key, size_t key_size)
+{
+    size_t offset = nl_msg_start_nested(odp_actions, OVS_ACTION_ATTR_SET);
+    nl_msg_put_unspec(odp_actions, key_type, key, key_size);
+    nl_msg_end_nested(odp_actions, offset);
+}
+
+static void
+commit_set_tun_id_action(const struct flow *flow, struct flow *base,
+                         struct ofpbuf *odp_actions)
+{
+    if (base->tun_id == flow->tun_id) {
+        return;
+    }
+    base->tun_id = flow->tun_id;
+
+    commit_set_action(odp_actions, OVS_KEY_ATTR_TUN_ID,
+                      &base->tun_id, sizeof(base->tun_id));
+}
+
+static void
+commit_set_ether_addr_action(const struct flow *flow, struct flow *base,
+                             struct ofpbuf *odp_actions)
+{
+    struct ovs_key_ethernet eth_key;
+
+    if (eth_addr_equals(base->dl_src, flow->dl_src) &&
+        eth_addr_equals(base->dl_dst, flow->dl_dst)) {
+        return;
+    }
+
+    memcpy(base->dl_src, flow->dl_src, ETH_ADDR_LEN);
+    memcpy(base->dl_dst, flow->dl_dst, ETH_ADDR_LEN);
+
+    memcpy(eth_key.eth_src, base->dl_src, ETH_ADDR_LEN);
+    memcpy(eth_key.eth_dst, base->dl_dst, ETH_ADDR_LEN);
+
+    commit_set_action(odp_actions, OVS_KEY_ATTR_ETHERNET,
+                      &eth_key, sizeof(eth_key));
+}
+
+static void
+commit_vlan_action(const struct flow *flow, struct flow *base,
+                   struct ofpbuf *odp_actions)
+{
+    if (base->vlan_tci == flow->vlan_tci) {
+        return;
+    }
+
+    if (base->vlan_tci & htons(VLAN_CFI)) {
+        nl_msg_put_flag(odp_actions, OVS_ACTION_ATTR_POP_VLAN);
+    }
+
+    if (flow->vlan_tci & htons(VLAN_CFI)) {
+        struct ovs_action_push_vlan vlan;
+
+        vlan.vlan_tpid = htons(ETH_TYPE_VLAN);
+        vlan.vlan_tci = flow->vlan_tci;
+        nl_msg_put_unspec(odp_actions, OVS_ACTION_ATTR_PUSH_VLAN,
+                          &vlan, sizeof vlan);
+    }
+    base->vlan_tci = flow->vlan_tci;
+}
+
+static void
+commit_set_ipv4_action(const struct flow *flow, struct flow *base,
+                     struct ofpbuf *odp_actions)
+{
+    struct ovs_key_ipv4 ipv4_key;
+
+    if (base->nw_src == flow->nw_src &&
+        base->nw_dst == flow->nw_dst &&
+        base->nw_tos == flow->nw_tos &&
+        base->nw_ttl == flow->nw_ttl &&
+        base->nw_frag == flow->nw_frag) {
+        return;
+    }
+
+    ipv4_key.ipv4_src = base->nw_src = flow->nw_src;
+    ipv4_key.ipv4_dst = base->nw_dst = flow->nw_dst;
+    ipv4_key.ipv4_tos = base->nw_tos = flow->nw_tos;
+    ipv4_key.ipv4_ttl = base->nw_ttl = flow->nw_ttl;
+    ipv4_key.ipv4_proto = base->nw_proto;
+    ipv4_key.ipv4_frag = ovs_to_odp_frag(base->nw_frag);
+
+    commit_set_action(odp_actions, OVS_KEY_ATTR_IPV4,
+                      &ipv4_key, sizeof(ipv4_key));
+}
+
+static void
+commit_set_ipv6_action(const struct flow *flow, struct flow *base,
+                       struct ofpbuf *odp_actions)
+{
+    struct ovs_key_ipv6 ipv6_key;
+
+    if (ipv6_addr_equals(&base->ipv6_src, &flow->ipv6_src) &&
+        ipv6_addr_equals(&base->ipv6_dst, &flow->ipv6_dst) &&
+        base->ipv6_label == flow->ipv6_label &&
+        base->nw_tos == flow->nw_tos &&
+        base->nw_ttl == flow->nw_ttl &&
+        base->nw_frag == flow->nw_frag) {
+        return;
+    }
+
+    base->ipv6_src = flow->ipv6_src;
+    memcpy(&ipv6_key.ipv6_src, &base->ipv6_src, sizeof(ipv6_key.ipv6_src));
+    base->ipv6_dst = flow->ipv6_dst;
+    memcpy(&ipv6_key.ipv6_dst, &base->ipv6_dst, sizeof(ipv6_key.ipv6_dst));
+
+    ipv6_key.ipv6_label = base->ipv6_label = flow->ipv6_label;
+    ipv6_key.ipv6_tclass = base->nw_tos = flow->nw_tos;
+    ipv6_key.ipv6_hlimit = base->nw_ttl = flow->nw_ttl;
+    ipv6_key.ipv6_proto = base->nw_proto;
+    ipv6_key.ipv6_frag = ovs_to_odp_frag(base->nw_frag);
+
+    commit_set_action(odp_actions, OVS_KEY_ATTR_IPV6,
+                      &ipv6_key, sizeof(ipv6_key));
+}
+
+static void
+commit_set_nw_action(const struct flow *flow, struct flow *base,
+                     struct ofpbuf *odp_actions)
+{
+    /* Check if flow really have an IP header. */
+    if (!flow->nw_proto) {
+        return;
+    }
+
+    if (base->dl_type == htons(ETH_TYPE_IP)) {
+        commit_set_ipv4_action(flow, base, odp_actions);
+    } else if (base->dl_type == htons(ETH_TYPE_IPV6)) {
+        commit_set_ipv6_action(flow, base, odp_actions);
+    }
+}
+
+static void
+commit_set_port_action(const struct flow *flow, struct flow *base,
+                       struct ofpbuf *odp_actions)
+{
+    if (!base->tp_src || !base->tp_dst) {
+        return;
+    }
+
+    if (base->tp_src == flow->tp_src &&
+        base->tp_dst == flow->tp_dst) {
+        return;
+    }
+
+    if (flow->nw_proto == IPPROTO_TCP) {
+        struct ovs_key_tcp port_key;
+
+        port_key.tcp_src = base->tp_src = flow->tp_src;
+        port_key.tcp_dst = base->tp_dst = flow->tp_dst;
+
+        commit_set_action(odp_actions, OVS_KEY_ATTR_TCP,
+                          &port_key, sizeof(port_key));
+
+    } else if (flow->nw_proto == IPPROTO_UDP) {
+        struct ovs_key_udp port_key;
+
+        port_key.udp_src = base->tp_src = flow->tp_src;
+        port_key.udp_dst = base->tp_dst = flow->tp_dst;
+
+        commit_set_action(odp_actions, OVS_KEY_ATTR_UDP,
+                          &port_key, sizeof(port_key));
+    }
+}
+
+static void
+commit_set_priority_action(const struct flow *flow, struct flow *base,
+                           struct ofpbuf *odp_actions)
+{
+    if (base->skb_priority == flow->skb_priority) {
+        return;
+    }
+    base->skb_priority = flow->skb_priority;
+
+    commit_set_action(odp_actions, OVS_KEY_ATTR_PRIORITY,
+                      &base->skb_priority, sizeof(base->skb_priority));
+}
+
+/* If any of the flow key data that ODP actions can modify are different in
+ * 'base' and 'flow', appends ODP actions to 'odp_actions' that change the flow
+ * key from 'base' into 'flow', and then changes 'base' the same way. */
+void
+commit_odp_actions(const struct flow *flow, struct flow *base,
+                   struct ofpbuf *odp_actions)
+{
+    commit_set_tun_id_action(flow, base, odp_actions);
+    commit_set_ether_addr_action(flow, base, odp_actions);
+    commit_vlan_action(flow, base, odp_actions);
+    commit_set_nw_action(flow, base, odp_actions);
+    commit_set_port_action(flow, base, odp_actions);
+    commit_set_priority_action(flow, base, odp_actions);
+}