linux: Add TCP_INFO support
Implement the getsockopt for TCP_INFO by mapping FreeBSD's version to what Linux expects. MFC after: 1 month Relnotes: yes Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D55882
This commit is contained in:
Chuck Tuffli
@@ -591,9 +591,7 @@ linux_to_bsd_tcp_sockopt(int opt)
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case LINUX_TCP_KEEPCNT:
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return (TCP_KEEPCNT);
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case LINUX_TCP_INFO:
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LINUX_RATELIMIT_MSG_OPT1(
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"unsupported TCP socket option TCP_INFO (%d)", opt);
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return (-2);
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return (TCP_INFO);
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case LINUX_TCP_MD5SIG:
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return (TCP_MD5SIG);
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case LINUX_TCP_USER_TIMEOUT:
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@@ -2407,6 +2405,42 @@ linux_getsockopt_so_linger(struct thread *td,
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return (linux_sockopt_copyout(td, &ling, len, args));
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}
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static int
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linux_getsockopt_tcp_info(struct thread *td,
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struct linux_getsockopt_args *args)
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{
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struct tcp_info tinfo;
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struct l_tcp_info l_tinfo;
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socklen_t len;
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int error;
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len = sizeof(tinfo);
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error = kern_getsockopt(td, args->s, IPPROTO_TCP, TCP_INFO, &tinfo,
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UIO_SYSSPACE, &len);
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if (error != 0)
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return (error);
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memset(&l_tinfo, 0, sizeof(l_tinfo));
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l_tinfo.tcpi_state = tinfo.tcpi_state;
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l_tinfo.tcpi_options = tinfo.tcpi_options;
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l_tinfo.tcpi_snd_wscale = tinfo.tcpi_snd_wscale;
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l_tinfo.tcpi_rcv_wscale = tinfo.tcpi_rcv_wscale;
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l_tinfo.tcpi_rto = tinfo.tcpi_rto;
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l_tinfo.tcpi_snd_mss = tinfo.tcpi_snd_mss;
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l_tinfo.tcpi_rcv_mss = tinfo.tcpi_rcv_mss;
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l_tinfo.tcpi_last_data_recv = tinfo.tcpi_last_data_recv;
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l_tinfo.tcpi_rtt = tinfo.tcpi_rtt;
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l_tinfo.tcpi_rttvar = tinfo.tcpi_rttvar;
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l_tinfo.tcpi_snd_ssthresh = tinfo.tcpi_snd_ssthresh;
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l_tinfo.tcpi_snd_cwnd = tinfo.tcpi_snd_cwnd;
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l_tinfo.tcpi_rcv_space = tinfo.tcpi_rcv_space;
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l_tinfo.tcpi_snd_wnd = tinfo.tcpi_snd_wnd;
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l_tinfo.tcpi_rcv_ooopack = tinfo.tcpi_rcv_ooopack;
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/* Eqivalent */
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l_tinfo.tcpi_total_retrans = tinfo.tcpi_snd_rexmitpack;
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return (linux_sockopt_copyout(td, &l_tinfo, len, args));
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}
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int
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linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
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{
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@@ -2505,6 +2539,13 @@ linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
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name = linux_to_bsd_ip6_sockopt(args->optname);
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break;
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case IPPROTO_TCP:
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switch (args->optname) {
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case LINUX_TCP_INFO:
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return (linux_getsockopt_tcp_info(td, args));
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/* NOTREACHED */
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default:
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break;
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}
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name = linux_to_bsd_tcp_sockopt(args->optname);
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switch (name) {
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case TCP_MAXUNACKTIME:
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@@ -359,6 +359,98 @@ struct l_ifreq {
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} ifr_ifru;
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};
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/*
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* Linux TCP_INFO structure as of v6.19.8
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*
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* Comments indicate last field for the given kernel version
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*/
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struct l_tcp_info {
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uint8_t tcpi_state;
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uint8_t tcpi_ca_state;
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uint8_t tcpi_retransmits;
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uint8_t tcpi_probes;
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uint8_t tcpi_backoff;
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uint8_t tcpi_options;
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uint8_t tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
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uint8_t tcpi_delivery_rate_app_limited:1, tcpi_fastopen_client_fail:2;
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uint32_t tcpi_rto;
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uint32_t tcpi_ato;
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uint32_t tcpi_snd_mss;
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uint32_t tcpi_rcv_mss;
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uint32_t tcpi_unacked;
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uint32_t tcpi_sacked;
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uint32_t tcpi_lost;
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uint32_t tcpi_retrans;
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uint32_t tcpi_fackets;
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uint32_t tcpi_last_data_sent;
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uint32_t tcpi_last_ack_sent;
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uint32_t tcpi_last_data_recv;
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uint32_t tcpi_last_ack_recv;
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uint32_t tcpi_pmtu;
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uint32_t tcpi_rcv_ssthresh;
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uint32_t tcpi_rtt;
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uint32_t tcpi_rttvar;
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uint32_t tcpi_snd_ssthresh;
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uint32_t tcpi_snd_cwnd;
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uint32_t tcpi_advmss;
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uint32_t tcpi_reordering;
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uint32_t tcpi_rcv_rtt;
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uint32_t tcpi_rcv_space;
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uint32_t tcpi_total_retrans; /* v3.6 */
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uint64_t tcpi_pacing_rate;
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uint64_t tcpi_max_pacing_rate; /* v3.14 */
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uint64_t tcpi_bytes_acked;
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uint64_t tcpi_bytes_received;
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uint32_t tcpi_segs_out;
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uint32_t tcpi_segs_in; /* v4.1 */
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uint32_t tcpi_notsent_bytes;
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uint32_t tcpi_min_rtt;
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uint32_t tcpi_data_segs_in;
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uint32_t tcpi_data_segs_out; /* v4.5 */
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uint64_t tcpi_delivery_rate; /* v4.8 */
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uint64_t tcpi_busy_time;
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uint64_t tcpi_rwnd_limited;
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uint64_t tcpi_sndbuf_limited; /* v4.9 */
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uint32_t tcpi_delivered;
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uint32_t tcpi_delivered_ce; /* v4.16 */
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uint64_t tcpi_bytes_sent;
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uint64_t tcpi_bytes_retrans;
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uint32_t tcpi_dsack_dups;
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uint32_t tcpi_reord_seen; /* v4.18 */
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uint32_t tcpi_rcv_ooopack;
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uint32_t tcpi_snd_wnd; /* v5.3 */
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uint32_t tcpi_rcv_wnd;
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uint32_t tcpi_rehash; /* v6.1 */
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uint16_t tcpi_total_rto;
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uint16_t tcpi_total_rto_recoveries;
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uint32_t tcpi_total_rto_time; /* v6.6 */
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uint32_t tcpi_received_ce;
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uint32_t tcpi_delivered_e1_bytes;
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uint32_t tcpi_delivered_e0_bytes;
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uint32_t tcpi_delivered_ce_bytes;
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uint32_t tcpi_received_e1_bytes;
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uint32_t tcpi_received_e0_bytes;
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uint32_t tcpi_received_ce_bytes;
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uint16_t tcpi_accecn_fail_mode;
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uint16_t tcpi_accecn_opt_seen; /* v6.17 */
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};
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/*
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* Define here members which are not exists in the FreeBSD struct ifreq.
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*/
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