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siftr: expose t_flags2 in siftr output

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Replace the old snd_bwnd field which was kept for compatibility with the
t_flags2 field from the tcpcb. This exposes in siftr logs interesting
things such as ECN, PLPMTUD, Accurate ECN and if first bytes are
complete.

Reviewed by:	rscheff (transport), chengc_netapp.com,  debdrup (manpages)
Sponsored by:   NetApp, Inc.
Sponsored by:   Klara, Inc.
X-NetApp-PR:    #73
Differential Revision:	https://reviews.freebsd.org/D34672
This commit is contained in:
Tom Jones 2022-04-07 10:12:33 +01:00
parent c71ae91f19
commit 1241e8e7ae
2 changed files with 16 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
share/man/man4/siftr.4
View File

@ -30,7 +30,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd October 7, 2019
.Dd April 7, 2022
.Dt SIFTR 4
.Os
.Sh NAME
@ -209,7 +209,7 @@ TCP/IP packet.
The data is CSV formatted.
.Bd -literal -offset indent
o,0xbec491a5,1238556193.463551,172.16.7.28,22,172.16.2.5,55931, \\
1073725440,172312,6144,66560,66608,8,1,4,1448,936,1,996,255, \\
1073725440,172312,34,66560,66608,8,1,4,1448,936,1,996,255, \\
33304,208,66608,0,208,0
.Ed
.Pp
@ -262,7 +262,7 @@ The current congestion window for the flow, in bytes.
.El
.Bl -tag -offset indent -width Va
.It Va 10
The current bandwidth-controlled window for the flow, in bytes.
The current state of the t_flags2 field for the flow.
.El
.Bl -tag -offset indent -width Va
.It Va 11

26
sys/netinet/siftr.c
View File

@ -132,7 +132,7 @@ __FBSDID("$FreeBSD$");
* Hard upper limit on the length of log messages. Bump this up if you add new
* data fields such that the line length could exceed the below value.
*/
#define MAX_LOG_MSG_LEN 200
#define MAX_LOG_MSG_LEN 300
/* XXX: Make this a sysctl tunable. */
#define SIFTR_ALQ_BUFLEN (1000*MAX_LOG_MSG_LEN)
@ -194,15 +194,15 @@ struct pkt_node {
/* Foreign TCP port. */
uint16_t tcp_foreignport;
/* Congestion Window (bytes). */
u_long snd_cwnd;
uint32_t snd_cwnd;
/* Sending Window (bytes). */
u_long snd_wnd;
uint32_t snd_wnd;
/* Receive Window (bytes). */
u_long rcv_wnd;
/* Unused (was: Bandwidth Controlled Window (bytes)). */
u_long snd_bwnd;
uint32_t rcv_wnd;
/* More tcpcb flags storage */
uint32_t t_flags2;
/* Slow Start Threshold (bytes). */
u_long snd_ssthresh;
uint32_t snd_ssthresh;
/* Current state of the TCP FSM. */
int conn_state;
/* Max Segment Size (bytes). */
@ -455,7 +455,7 @@ siftr_process_pkt(struct pkt_node * pkt_node)
log_buf->ae_bytesused = snprintf(log_buf->ae_data,
MAX_LOG_MSG_LEN,
"%c,0x%08x,%zd.%06ld,%x:%x:%x:%x:%x:%x:%x:%x,%u,%x:%x:%x:"
"%x:%x:%x:%x:%x,%u,%ld,%ld,%ld,%ld,%ld,%u,%u,%u,%u,%u,%u,"
"%x:%x:%x:%x:%x,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,"
"%u,%d,%u,%u,%u,%u,%u,%u,%u,%u\n",
direction[pkt_node->direction],
pkt_node->hash,
@ -481,7 +481,7 @@ siftr_process_pkt(struct pkt_node * pkt_node)
ntohs(pkt_node->tcp_foreignport),
pkt_node->snd_ssthresh,
pkt_node->snd_cwnd,
pkt_node->snd_bwnd,
pkt_node->t_flags2,
pkt_node->snd_wnd,
pkt_node->rcv_wnd,
pkt_node->snd_scale,
@ -514,8 +514,8 @@ siftr_process_pkt(struct pkt_node * pkt_node)
/* Construct an IPv4 log message. */
log_buf->ae_bytesused = snprintf(log_buf->ae_data,
MAX_LOG_MSG_LEN,
"%c,0x%08x,%jd.%06ld,%u.%u.%u.%u,%u,%u.%u.%u.%u,%u,%ld,%ld,"
"%ld,%ld,%ld,%u,%u,%u,%u,%u,%u,%u,%d,%u,%u,%u,%u,%u,%u,%u,%u\n",
"%c,0x%08x,%jd.%06ld,%u.%u.%u.%u,%u,%u.%u.%u.%u,%u,%u,%u,"
"%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%d,%u,%u,%u,%u,%u,%u,%u,%u\n",
direction[pkt_node->direction],
pkt_node->hash,
(intmax_t)pkt_node->tval.tv_sec,
@ -532,7 +532,7 @@ siftr_process_pkt(struct pkt_node * pkt_node)
ntohs(pkt_node->tcp_foreignport),
pkt_node->snd_ssthresh,
pkt_node->snd_cwnd,
pkt_node->snd_bwnd,
pkt_node->t_flags2,
pkt_node->snd_wnd,
pkt_node->rcv_wnd,
pkt_node->snd_scale,
@ -782,7 +782,7 @@ siftr_siftdata(struct pkt_node *pn, struct inpcb *inp, struct tcpcb *tp,
pn->snd_cwnd = tp->snd_cwnd;
pn->snd_wnd = tp->snd_wnd;
pn->rcv_wnd = tp->rcv_wnd;
pn->snd_bwnd = 0; /* Unused, kept for compat. */
pn->t_flags2 = tp->t_flags2;
pn->snd_ssthresh = tp->snd_ssthresh;
pn->snd_scale = tp->snd_scale;
pn->rcv_scale = tp->rcv_scale;