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MINOR: tcp: add further tcp info fetchers

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Adding on to Thierry's work (http://git.haproxy.org/?p=haproxy.git;h=6310bef5)
I have added a few more fetchers for counters based on the tcp_info struct
maintained by the kernel :

  fc_unacked, fc_sacked, fc_retrans, fc_fackets, fc_lost,
  fc_reordering

Two fields were not added because they're version-dependant :
  fc_rcv_rtt, fc_total_retrans

The fields name depend on the operating system. FreeBSD and NetBSD prefix
all the field names with "__" so we have to rely on a few #ifdef for
portability.
This commit is contained in:
Joe Williams 2016-08-10 07:06:44 -07:00 committed by Willy Tarreau
parent 091e86e1ee
commit 30fcd39f35
2 changed files with 124 additions and 6 deletions
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36
doc/configuration.txt
View File

@ -12767,6 +12767,42 @@ fc_rttvar(<unit>) : integer
operating system does not support TCP_INFO, for example Linux kernels before
2.4, the sample fetch fails.
fc_unacked(<unit>) : integer
Returns the unacked counter measured by the kernel for the client connection.
If the server connection is not established, if the connection is not TCP or
if the operating system does not support TCP_INFO, for example Linux kernels
before 2.4, the sample fetch fails.
fc_sacked(<unit>) : integer
Returns the sacked counter measured by the kernel for the client connection.
If the server connection is not established, if the connection is not TCP or
if the operating system does not support TCP_INFO, for example Linux kernels
before 2.4, the sample fetch fails.
fc_retrans(<unit>) : integer
Returns the retransmits counter measured by the kernel for the client
connection. If the server connection is not established, if the connection is
not TCP or if the operating system does not support TCP_INFO, for example
Linux kernels before 2.4, the sample fetch fails.
fc_fackets(<unit>) : integer
Returns the fack counter measured by the kernel for the client
connection. If the server connection is not established, if the connection is
not TCP or if the operating system does not support TCP_INFO, for example
Linux kernels before 2.4, the sample fetch fails.
fc_lost(<unit>) : integer
Returns the lost counter measured by the kernel for the client
connection. If the server connection is not established, if the connection is
not TCP or if the operating system does not support TCP_INFO, for example
Linux kernels before 2.4, the sample fetch fails.
fc_reordering(<unit>) : integer
Returns the reordering counter measured by the kernel for the client
connection. If the server connection is not established, if the connection is
not TCP or if the operating system does not support TCP_INFO, for example
Linux kernels before 2.4, the sample fetch fails.
fe_id : integer
Returns an integer containing the current frontend's id. It can be used in
backends to check from which backend it was called, or to stick all users

94
src/proto_tcp.c
View File

@ -2395,8 +2395,25 @@ static inline int get_tcp_info(const struct arg *args, struct sample *smp,
/* extract the value. */
smp->data.type = SMP_T_SINT;
switch (val) {
case 0: smp->data.u.sint = info.tcpi_rtt; break;
case 1: smp->data.u.sint = info.tcpi_rttvar; break;
case 0: smp->data.u.sint = info.tcpi_rtt; break;
case 1: smp->data.u.sint = info.tcpi_rttvar; break;
#if defined(__linux__)
/* these ones are common to all Linux versions */
case 2: smp->data.u.sint = info.tcpi_unacked; break;
case 3: smp->data.u.sint = info.tcpi_sacked; break;
case 4: smp->data.u.sint = info.tcpi_lost; break;
case 5: smp->data.u.sint = info.tcpi_retrans; break;
case 6: smp->data.u.sint = info.tcpi_fackets; break;
case 7: smp->data.u.sint = info.tcpi_reordering; break;
#elif defined(__FreeBSD__) || defined(__NetBSD__)
/* the ones are found on FreeBSD and NetBSD featuring TCP_INFO */
case 2: smp->data.u.sint = info.__tcpi_unacked; break;
case 3: smp->data.u.sint = info.__tcpi_sacked; break;
case 4: smp->data.u.sint = info.__tcpi_lost; break;
case 5: smp->data.u.sint = info.__tcpi_retrans; break;
case 6: smp->data.u.sint = info.__tcpi_fackets; break;
case 7: smp->data.u.sint = info.__tcpi_reordering; break;
#endif
default: return 0;
}
@ -2435,7 +2452,64 @@ smp_fetch_fc_rttvar(const struct arg *args, struct sample *smp, const char *kw,
return 0;
return 1;
}
#endif
#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
/* get the unacked counter on a client connexion */
static int
smp_fetch_fc_unacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
if (!get_tcp_info(args, smp, 0, 2))
return 0;
return 1;
}
/* get the sacked counter on a client connexion */
static int
smp_fetch_fc_sacked(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
if (!get_tcp_info(args, smp, 0, 3))
return 0;
return 1;
}
/* get the lost counter on a client connexion */
static int
smp_fetch_fc_lost(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
if (!get_tcp_info(args, smp, 0, 4))
return 0;
return 1;
}
/* get the retrans counter on a client connexion */
static int
smp_fetch_fc_retrans(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
if (!get_tcp_info(args, smp, 0, 5))
return 0;
return 1;
}
/* get the fackets counter on a client connexion */
static int
smp_fetch_fc_fackets(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
if (!get_tcp_info(args, smp, 0, 6))
return 0;
return 1;
}
/* get the reordering counter on a client connexion */
static int
smp_fetch_fc_reordering(const struct arg *args, struct sample *smp, const char *kw, void *private)
{
if (!get_tcp_info(args, smp, 0, 7))
return 0;
return 1;
}
#endif // linux || freebsd || netbsd
#endif // TCP_INFO
#ifdef IPV6_V6ONLY
/* parse the "v4v6" bind keyword */
@ -2667,9 +2741,17 @@ static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, {
{ "src_is_local", smp_fetch_src_is_local, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI },
{ "src_port", smp_fetch_sport, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI },
#ifdef TCP_INFO
{ "fc_rtt", smp_fetch_fc_rtt, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
{ "fc_rttvar", smp_fetch_fc_rttvar, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
#endif
{ "fc_rtt", smp_fetch_fc_rtt, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
{ "fc_rttvar", smp_fetch_fc_rttvar, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
{ "fc_unacked", smp_fetch_fc_unacked, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
{ "fc_sacked", smp_fetch_fc_sacked, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
{ "fc_retrans", smp_fetch_fc_retrans, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
{ "fc_fackets", smp_fetch_fc_fackets, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
{ "fc_lost", smp_fetch_fc_lost, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
{ "fc_reordering", smp_fetch_fc_reordering, ARG1(0,STR), NULL, SMP_T_SINT, SMP_USE_L4CLI },
#endif // linux || freebsd || netbsd
#endif // TCP_INFO
{ /* END */ },
}};