diff options
Diffstat (limited to 'net/dccp/ackvec.h')
| -rw-r--r-- | net/dccp/ackvec.h | 53 |
1 files changed, 40 insertions, 13 deletions
diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h index f7dfb5f67b8..ec7a89bb7b3 100644 --- a/net/dccp/ackvec.h +++ b/net/dccp/ackvec.h @@ -13,6 +13,7 @@ #include <linux/config.h> #include <linux/compiler.h> +#include <linux/list.h> #include <linux/time.h> #include <linux/types.h> @@ -42,39 +43,57 @@ * Ack Vectors it has recently sent. For each packet sent carrying an * Ack Vector, it remembers four variables: * - * @dccpav_ack_seqno - the Sequence Number used for the packet - * (HC-Receiver seqno) * @dccpav_ack_ptr - the value of buf_head at the time of acknowledgement. - * @dccpav_ack_ackno - the Acknowledgement Number used for the packet - * (HC-Sender seqno) + * @dccpav_records - list of dccp_ackvec_record * @dccpav_ack_nonce - the one-bit sum of the ECN Nonces for all State 0. * - * @dccpav_buf_len - circular buffer length * @dccpav_time - the time in usecs * @dccpav_buf - circular buffer of acknowledgeable packets */ struct dccp_ackvec { u64 dccpav_buf_ackno; - u64 dccpav_ack_seqno; - u64 dccpav_ack_ackno; + struct list_head dccpav_records; struct timeval dccpav_time; u8 dccpav_buf_head; u8 dccpav_buf_tail; u8 dccpav_ack_ptr; u8 dccpav_sent_len; u8 dccpav_vec_len; - u8 dccpav_buf_len; u8 dccpav_buf_nonce; u8 dccpav_ack_nonce; - u8 dccpav_buf[0]; + u8 dccpav_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 + * + * @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 + */ +struct dccp_ackvec_record { + struct list_head dccpavr_node; + u64 dccpavr_ack_seqno; + u64 dccpavr_ack_ackno; + u8 dccpavr_ack_ptr; + u8 dccpavr_ack_nonce; + u8 dccpavr_sent_len; }; struct sock; struct sk_buff; #ifdef CONFIG_IP_DCCP_ACKVEC -extern struct dccp_ackvec *dccp_ackvec_alloc(unsigned int len, - const gfp_t priority); +extern int dccp_ackvec_init(void); +extern void dccp_ackvec_exit(void); + +extern struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority); extern void dccp_ackvec_free(struct dccp_ackvec *av); extern int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk, @@ -92,8 +111,16 @@ static inline int dccp_ackvec_pending(const struct dccp_ackvec *av) return av->dccpav_sent_len != av->dccpav_vec_len; } #else /* CONFIG_IP_DCCP_ACKVEC */ -static inline struct dccp_ackvec *dccp_ackvec_alloc(unsigned int len, - const gfp_t priority) +static inline int dccp_ackvec_init(void) +{ + return 0; +} + +static inline void dccp_ackvec_exit(void) +{ +} + +static inline struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority) { return NULL; } |