1 files changed, 30 insertions, 3 deletions

diff --git a/include/linux/dccp.h b/include/linux/dccp.h
index 7434a8353e23..010e2d87ed75 100644
--- a/include/linux/dccp.h
+++ b/include/linux/dccp.h
@@ -165,8 +165,10 @@ enum {
         DCCPO_TIMESTAMP_ECHO = 42,
         DCCPO_ELAPSED_TIME = 43,
         DCCPO_MAX = 45,
-        DCCPO_MIN_CCID_SPECIFIC = 128,
-        DCCPO_MAX_CCID_SPECIFIC = 255,
+        DCCPO_MIN_RX_CCID_SPECIFIC = 128,       /* from sender to receiver */
+        DCCPO_MAX_RX_CCID_SPECIFIC = 191,
+        DCCPO_MIN_TX_CCID_SPECIFIC = 192,       /* from receiver to sender */
+        DCCPO_MAX_TX_CCID_SPECIFIC = 255,
 };
 /* maximum size of a single TLV-encoded DCCP option (sans type/len bytes) */
 #define DCCP_SINGLE_OPT_MAXLEN  253
@@ -195,6 +197,21 @@ enum dccp_feature_numbers {
         DCCPF_MAX_CCID_SPECIFIC = 255,
 };
 
+/* DCCP socket control message types for cmsg */
+enum dccp_cmsg_type {
+        DCCP_SCM_PRIORITY = 1,
+        DCCP_SCM_QPOLICY_MAX = 0xFFFF,
+        /* ^-- Up to here reserved exclusively for qpolicy parameters */
+        DCCP_SCM_MAX
+};
+
+/* DCCP priorities for outgoing/queued packets */
+enum dccp_packet_dequeueing_policy {
+        DCCPQ_POLICY_SIMPLE,
+        DCCPQ_POLICY_PRIO,
+        DCCPQ_POLICY_MAX
+};
+
 /* DCCP socket options */
 #define DCCP_SOCKOPT_PACKET_SIZE        1 /* XXX deprecated, without effect */
 #define DCCP_SOCKOPT_SERVICE            2
@@ -208,6 +225,8 @@ enum dccp_feature_numbers {
 #define DCCP_SOCKOPT_CCID               13
 #define DCCP_SOCKOPT_TX_CCID            14
 #define DCCP_SOCKOPT_RX_CCID            15
+#define DCCP_SOCKOPT_QPOLICY_ID         16
+#define DCCP_SOCKOPT_QPOLICY_TXQLEN     17
 #define DCCP_SOCKOPT_CCID_RX_INFO       128
 #define DCCP_SOCKOPT_CCID_TX_INFO       192
 
@@ -456,11 +475,15 @@ struct dccp_ackvec;
  * @dccps_hc_rx_ccid - CCID used for the receiver (or receiving half-connection)
  * @dccps_hc_tx_ccid - CCID used for the sender (or sending half-connection)
  * @dccps_options_received - parsed set of retrieved options
+ * @dccps_qpolicy - TX dequeueing policy, one of %dccp_packet_dequeueing_policy
+ * @dccps_tx_qlen - maximum length of the TX queue
  * @dccps_role - role of this sock, one of %dccp_role
  * @dccps_hc_rx_insert_options - receiver wants to add options when acking
  * @dccps_hc_tx_insert_options - sender wants to add options when sending
  * @dccps_server_timewait - server holds timewait state on close (RFC 4340, 8.3)
- * @dccps_xmit_timer - timer for when CCID is not ready to send
+ * @dccps_sync_scheduled - flag which signals "send out-of-band message soon"
+ * @dccps_xmitlet - tasklet scheduled by the TX CCID to dequeue data packets
+ * @dccps_xmit_timer - used by the TX CCID to delay sending (rate-based pacing)
  * @dccps_syn_rtt - RTT sample from Request/Response exchange (in usecs)
  */
 struct dccp_sock {
@@ -496,10 +519,14 @@ struct dccp_sock {
         struct ccid                     *dccps_hc_rx_ccid;
         struct ccid                     *dccps_hc_tx_ccid;
         struct dccp_options_received    dccps_options_received;
+        __u8                            dccps_qpolicy;
+        __u32                           dccps_tx_qlen;
         enum dccp_role                  dccps_role:2;
         __u8                            dccps_hc_rx_insert_options:1;
         __u8                            dccps_hc_tx_insert_options:1;
         __u8                            dccps_server_timewait:1;
+        __u8                            dccps_sync_scheduled:1;
+        struct tasklet_struct           dccps_xmitlet;
         struct timer_list               dccps_xmit_timer;
 };