- Remove net.inet.tcp.reass.overflows sysctl. It counts exactly
same events that tcpstat's tcps_rcvmemdrop counter counts. - Rename tcps_rcvmemdrop to tcps_rcvreassfull and improve its description in netstat(1) output. Sponsored by: Netflix Sponsored by: Nginx, Inc.
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parent
2bd073e13b
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=265408
@ -72,16 +72,6 @@ __FBSDID("$FreeBSD$");
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#include <netinet6/tcp6_var.h>
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#include <netinet/tcpip.h>
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static SYSCTL_NODE(_net_inet_tcp, OID_AUTO, reass, CTLFLAG_RW, 0,
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"TCP Segment Reassembly Queue");
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static VNET_DEFINE(int, tcp_reass_overflows) = 0;
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#define V_tcp_reass_overflows VNET(tcp_reass_overflows)
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SYSCTL_VNET_INT(_net_inet_tcp_reass, OID_AUTO, overflows,
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CTLTYPE_INT | CTLFLAG_RD,
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&VNET_NAME(tcp_reass_overflows), 0,
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"Global number of TCP Segment Reassembly Queue Overflows");
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void
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tcp_reass_flush(struct tcpcb *tp)
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{
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@ -142,8 +132,7 @@ tcp_reass(struct tcpcb *tp, struct tcphdr *th, int *tlenp, struct mbuf *m)
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tp->t_segqlen + m->m_pkthdr.len >= sbspace(&so->so_rcv)) {
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char *s;
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V_tcp_reass_overflows++;
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TCPSTAT_INC(tcps_rcvmemdrop);
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TCPSTAT_INC(tcps_rcvreassfull);
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*tlenp = 0;
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if ((s = tcp_log_addrs(&tp->t_inpcb->inp_inc, th, NULL,
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NULL))) {
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@ -426,7 +426,7 @@ struct tcpstat {
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uint64_t tcps_rcvbyte; /* bytes received in sequence */
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uint64_t tcps_rcvbadsum; /* packets received with ccksum errs */
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uint64_t tcps_rcvbadoff; /* packets received with bad offset */
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uint64_t tcps_rcvmemdrop; /* packets dropped for lack of memory */
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uint64_t tcps_rcvreassfull; /* packets dropped for no reass space */
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uint64_t tcps_rcvshort; /* packets received too short */
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uint64_t tcps_rcvduppack; /* duplicate-only packets received */
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uint64_t tcps_rcvdupbyte; /* duplicate-only bytes received */
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@ -660,7 +660,8 @@ tcp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
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p(tcps_rcvbadsum, "\t\t%ju discarded for bad checksum%s\n");
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p(tcps_rcvbadoff, "\t\t%ju discarded for bad header offset field%s\n");
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p1a(tcps_rcvshort, "\t\t%ju discarded because packet too short\n");
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p1a(tcps_rcvmemdrop, "\t\t%ju discarded due to memory problems\n");
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p1a(tcps_rcvreassfull,
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"\t\t%ju discarded due to no space in reassembly queue\n");
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p(tcps_connattempt, "\t%ju connection request%s\n");
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p(tcps_accepts, "\t%ju connection accept%s\n");
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p(tcps_badsyn, "\t%ju bad connection attempt%s\n");
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