From cc6ac9bccf6b9814d37932e86a92f8e6a92960dc Mon Sep 17 00:00:00 2001 From: Xin Long Date: Sat, 8 Oct 2016 11:36:05 +0800 Subject: sctp: reuse sent_count to avoid retransmitted chunks for RTT measurements Now sctp uses chunk->resent to record if a chunk is retransmitted, for RTT measurements with retransmitted DATA chunks. chunk->sent_count was introduced to record how many times one chunk has been sent for prsctp RTX policy before. We actually can know if one chunk is retransmitted by checking chunk->sent_count is greater than 1. This patch is to remove resent from sctp_chunk and reuse sent_count to avoid retransmitted chunks for RTT measurements. Signed-off-by: Xin Long Acked-by: Marcelo Ricardo Leitner Signed-off-by: David S. Miller --- include/net/sctp/structs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/net/sctp') diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 11c3bf262a85..27a933e4c90e 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -641,7 +641,6 @@ struct sctp_chunk { #define SCTP_NEED_FRTX 0x1 #define SCTP_DONT_FRTX 0x2 __u16 rtt_in_progress:1, /* This chunk used for RTT calc? */ - resent:1, /* Has this chunk ever been resent. */ has_tsn:1, /* Does this chunk have a TSN yet? */ has_ssn:1, /* Does this chunk have a SSN yet? */ singleton:1, /* Only chunk in the packet? */ @@ -656,6 +655,7 @@ struct sctp_chunk { fast_retransmit:2; /* Is this chunk fast retransmitted? */ }; +#define sctp_chunk_retransmitted(chunk) (chunk->sent_count > 1) void sctp_chunk_hold(struct sctp_chunk *); void sctp_chunk_put(struct sctp_chunk *); int sctp_user_addto_chunk(struct sctp_chunk *chunk, int len, -- cgit v1.2.3