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Differential D29471 Diff 86439 sys/netinet/tcp_hostcache.c

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sys/netinet/tcp_hostcache.c

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/* /*
* Sysctl function: prints the list and values of all hostcache entries in * Sysctl function: prints the list and values of all hostcache entries in
* unsorted order. * unsorted order.
*/ */
static int static int
sysctl_tcp_hc_list(SYSCTL_HANDLER_ARGS) sysctl_tcp_hc_list(SYSCTL_HANDLER_ARGS)
{ {
const int linesize = 128;
struct sbuf sb; struct sbuf sb;
int i, error; int i, error = 0;
hselaskyUnsubmitted
Done
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Setting error to 0 is superfluous from what I can see.

hselasky: Setting error to 0 is superfluous from what I can see.
struct hc_metrics *hc_entry; struct hc_metrics *hc_entry;
char ip4buf[INET_ADDRSTRLEN]; char ip4buf[INET_ADDRSTRLEN];
#ifdef INET6 #ifdef INET6
char ip6buf[INET6_ADDRSTRLEN]; char ip6buf[INET6_ADDRSTRLEN];
#endif #endif
if (jailed_without_vnet(curthread->td_ucred) != 0) if (jailed_without_vnet(curthread->td_ucred) != 0)
return (EPERM); return (EPERM);
sbuf_new(&sb, NULL, linesize * (V_tcp_hostcache.cache_count + 1), error = sysctl_wire_old_buffer(req, 0);
SBUF_INCLUDENUL); if (error == 0) {
sbuf_new_for_sysctl(&sb, NULL, 512, req);
sbuf_printf(&sb, sbuf_printf(&sb,
"\nIP address MTU SSTRESH RTT RTTVAR " "\nIP address MTU SSTRESH RTT RTTVAR "
" CWND SENDPIPE RECVPIPE HITS UPD EXP\n"); " CWND SENDPIPE RECVPIPE HITS UPD EXP\n");
#define msec(u) (((u) + 500) / 1000) #define msec(u) (((u) + 500) / 1000)
for (i = 0; i < V_tcp_hostcache.hashsize; i++) { for (i = 0; i < V_tcp_hostcache.hashsize; i++) {
THC_LOCK(&V_tcp_hostcache.hashbase[i].hch_mtx); THC_LOCK(&V_tcp_hostcache.hashbase[i].hch_mtx);
TAILQ_FOREACH(hc_entry, &V_tcp_hostcache.hashbase[i].hch_bucket, TAILQ_FOREACH(hc_entry,
rmx_q) { &V_tcp_hostcache.hashbase[i].hch_bucket, rmx_q) {
sbuf_printf(&sb, sbuf_printf(&sb,
"%-15s %5u %8u %6lums %6lums %8u %8u %8u %4lu " "%-15s %5u %8u %6lums %6lums %8u %8u "
"%4lu %4i\n", "%8u %4lu %4lu %4i\n",
hc_entry->ip4.s_addr ? hc_entry->ip4.s_addr ?
inet_ntoa_r(hc_entry->ip4, ip4buf) : inet_ntoa_r(hc_entry->ip4, ip4buf) :
#ifdef INET6 #ifdef INET6
ip6_sprintf(ip6buf, &hc_entry->ip6), ip6_sprintf(ip6buf, &hc_entry->ip6),
#else #else
"IPv6?", "IPv6?",
#endif #endif
hc_entry->rmx_mtu, hc_entry->rmx_mtu,
hc_entry->rmx_ssthresh, hc_entry->rmx_ssthresh,
msec((u_long)hc_entry->rmx_rtt * msec((u_long)hc_entry->rmx_rtt *
(RTM_RTTUNIT / (hz * TCP_RTT_SCALE))), (RTM_RTTUNIT / (hz * TCP_RTT_SCALE))),
msec((u_long)hc_entry->rmx_rttvar * msec((u_long)hc_entry->rmx_rttvar *
(RTM_RTTUNIT / (hz * TCP_RTTVAR_SCALE))), (RTM_RTTUNIT / (hz * TCP_RTTVAR_SCALE))),
hc_entry->rmx_cwnd, hc_entry->rmx_cwnd,
hc_entry->rmx_sendpipe, hc_entry->rmx_sendpipe,
hc_entry->rmx_recvpipe, hc_entry->rmx_recvpipe,
hc_entry->rmx_hits, hc_entry->rmx_hits,
hc_entry->rmx_updates, hc_entry->rmx_updates,
hc_entry->rmx_expire); hc_entry->rmx_expire);
} }
THC_UNLOCK(&V_tcp_hostcache.hashbase[i].hch_mtx); THC_UNLOCK(&V_tcp_hostcache.hashbase[i].hch_mtx);
} }
#undef msec #undef msec
error = sbuf_finish(&sb); error = sbuf_finish(&sb);
if (error == 0)
error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
sbuf_delete(&sb); sbuf_delete(&sb);
}
return(error); return(error);
} }
/* /*
* Caller has to make sure the curvnet is set properly. * Caller has to make sure the curvnet is set properly.
*/ */
static void static void
tcp_hc_purge_internal(int all) tcp_hc_purge_internal(int all)
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