dccp: Set per-connection CCIDs via socket options

[firefly-linux-kernel-4.4.55.git] / net / dccp / ackvec.h

diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h
index 96504a3b16e43dc3a00ada1a3f44f709394c3aae..4ccee030524e403abac5cec98e340307937021b1 100644 (file)
--- a/net/dccp/ackvec.h
+++ b/net/dccp/ackvec.h
@@ -11,15 +11,14 @@
  *     published by the Free Software Foundation.
  */
 
+#include <linux/dccp.h>
 #include <linux/compiler.h>
+#include <linux/ktime.h>
 #include <linux/list.h>
-#include <linux/time.h>
 #include <linux/types.h>
 
-/* Read about the ECN nonce to see why it is 253 */
-#define DCCP_MAX_ACKVEC_OPT_LEN 253
 /* We can spread an ack vector across multiple options */
-#define DCCP_MAX_ACKVEC_LEN (DCCP_MAX_ACKVEC_OPT_LEN * 2)
+#define DCCP_MAX_ACKVEC_LEN (DCCP_SINGLE_OPT_MAXLEN * 2)
 
 #define DCCP_ACKVEC_STATE_RECEIVED     0
 #define DCCP_ACKVEC_STATE_ECN_MARKED   (1 << 6)
@@ -32,54 +31,54 @@
  *
  * This data structure is the one defined in RFC 4340, Appendix A.
  *
- * @dccpav_buf_head - circular buffer head
- * @dccpav_buf_tail - circular buffer tail
- * @dccpav_buf_ackno - ack # of the most recent packet acknowledgeable in the
- *                    buffer (i.e. %dccpav_buf_head)
- * @dccpav_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked
+ * @av_buf_head - circular buffer head
+ * @av_buf_tail - circular buffer tail
+ * @av_buf_ackno - ack # of the most recent packet acknowledgeable in the
+ *                    buffer (i.e. %av_buf_head)
+ * @av_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked
  *                    by the buffer with State 0
  *
  * Additionally, the HC-Receiver must keep some information about the
  * Ack Vectors it has recently sent. For each packet sent carrying an
  * Ack Vector, it remembers four variables:
  *
- * @dccpav_records - list of dccp_ackvec_record
- * @dccpav_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
+ * @av_records - list of dccp_ackvec_record
+ * @av_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
  *
- * @dccpav_time                - the time in usecs
- * @dccpav_buf - circular buffer of acknowledgeable packets
+ * @av_time - the time in usecs
+ * @av_buf - circular buffer of acknowledgeable packets
  */
 struct dccp_ackvec {
-       u64             dccpav_buf_ackno;
-       struct list_head dccpav_records;
-       struct timeval  dccpav_time;
-       u16             dccpav_buf_head;
-       u16             dccpav_vec_len;
-       u8              dccpav_buf_nonce;
-       u8              dccpav_ack_nonce;
-       u8              dccpav_buf[DCCP_MAX_ACKVEC_LEN];
+       u64                     av_buf_ackno;
+       struct list_head        av_records;
+       ktime_t                 av_time;
+       u16                     av_buf_head;
+       u16                     av_vec_len;
+       u8                      av_buf_nonce;
+       u8                      av_ack_nonce;
+       u8                      av_buf[DCCP_MAX_ACKVEC_LEN];
 };
 
 /** struct dccp_ackvec_record - ack vector record
  *
  * ACK vector record as defined in Appendix A of spec.
  *
- * The list is sorted by dccpavr_ack_seqno
+ * The list is sorted by avr_ack_seqno
  *
- * @dccpavr_node - node in dccpav_records
- * @dccpavr_ack_seqno - sequence number of the packet this record was sent on
- * @dccpavr_ack_ackno - sequence number being acknowledged
- * @dccpavr_ack_ptr - pointer into dccpav_buf where this record starts
- * @dccpavr_ack_nonce - dccpav_ack_nonce at the time this record was sent
- * @dccpavr_sent_len - lenght of the record in dccpav_buf
+ * @avr_node - node in av_records
+ * @avr_ack_seqno - sequence number of the packet this record was sent on
+ * @avr_ack_ackno - sequence number being acknowledged
+ * @avr_ack_ptr - pointer into av_buf where this record starts
+ * @avr_ack_nonce - av_ack_nonce at the time this record was sent
+ * @avr_sent_len - lenght of the record in av_buf
  */
 struct dccp_ackvec_record {
-       struct list_head dccpavr_node;
-       u64              dccpavr_ack_seqno;
-       u64              dccpavr_ack_ackno;
-       u16              dccpavr_ack_ptr;
-       u16              dccpavr_sent_len;
-       u8               dccpavr_ack_nonce;
+       struct list_head avr_node;
+       u64              avr_ack_seqno;
+       u64              avr_ack_ackno;
+       u16              avr_ack_ptr;
+       u16              avr_sent_len;
+       u8               avr_ack_nonce;
 };
 
 struct sock;
@@ -105,7 +104,7 @@ extern int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb);
 
 static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
 {
-       return av->dccpav_vec_len;
+       return av->av_vec_len;
 }
 #else /* CONFIG_IP_DCCP_ACKVEC */
 static inline int dccp_ackvec_init(void)