Introduce a new TCP stat to record the number of DSACK blocks received (RFC4989 tcpEStatsStackDSACKDups) and expose it in both tcp_info (TCP_INFO) and opt_stats (SOF_TIMESTAMPING_OPT_STATS).
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| @@ -238,6 +238,7 @@ struct tcp_info { · 237 unmodified lines | ||
| 238 | 238 | |
| 239 | 239 | __u64 tcpi_bytes_sent; /* RFC4898 tcpEStatsPerfHCDataOctetsOut */ |
| 240 | 240 | __u64 tcpi_bytes_retrans; /* RFC4898 tcpEStatsPerfOctetsRetrans */ |
| 241 | + __u32 tcpi_dsack_dups; /* RFC4898 tcpEStatsStackDSACKDups */ | |
| 241 | 242 | }; |
| 242 | 243 | |
| 243 | 244 | /* netlink attributes types for SCM_TIMESTAMPING_OPT_STATS */ |
| @@ -262,6 +263,7 @@ enum { · 18 unmodified lines | ||
| 262 | 263 | TCP_NLA_DELIVERED_CE, /* Like above but only ones w/ CE marks */ |
| 263 | 264 | TCP_NLA_BYTES_SENT, /* Data bytes sent including retransmission */ |
| 264 | 265 | TCP_NLA_BYTES_RETRANS, /* Data bytes retransmitted */ |
| 266 | + TCP_NLA_DSACK_DUPS, /* DSACK blocks received */ | |
| 265 | 267 | }; |
| 266 | 268 | |
| 267 | 269 | /* for TCP_MD5SIG socket option */ |