diff options
| author |   Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
|---|---|---|
| committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
| commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
| tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/Documentation/networking/proc_net_tcp.txt | |
| parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) | |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/Documentation/networking/proc_net_tcp.txt')
| -rw-r--r-- | kernel/Documentation/networking/proc_net_tcp.txt | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/kernel/Documentation/networking/proc_net_tcp.txt b/kernel/Documentation/networking/proc_net_tcp.txt new file mode 100644 index 000000000..4a79209e7 --- /dev/null +++ b/kernel/Documentation/networking/proc_net_tcp.txt @@ -0,0 +1,48 @@ +This document describes the interfaces /proc/net/tcp and /proc/net/tcp6. +Note that these interfaces are deprecated in favor of tcp_diag. + +These /proc interfaces provide information about currently active TCP +connections, and are implemented by tcp4_seq_show() in net/ipv4/tcp_ipv4.c +and tcp6_seq_show() in net/ipv6/tcp_ipv6.c, respectively. + +It will first list all listening TCP sockets, and next list all established +TCP connections. A typical entry of /proc/net/tcp would look like this (split +up into 3 parts because of the length of the line): + + 46: 010310AC:9C4C 030310AC:1770 01 + | | | | | |--> connection state + | | | | |------> remote TCP port number + | | | |-------------> remote IPv4 address + | | |--------------------> local TCP port number + | |---------------------------> local IPv4 address + |----------------------------------> number of entry + + 00000150:00000000 01:00000019 00000000 + | | | | |--> number of unrecovered RTO timeouts + | | | |----------> number of jiffies until timer expires + | | |----------------> timer_active (see below) + | |----------------------> receive-queue + |-------------------------------> transmit-queue + + 1000 0 54165785 4 cd1e6040 25 4 27 3 -1 + | | | | | | | | | |--> slow start size threshold, + | | | | | | | | | or -1 if the threshold + | | | | | | | | | is >= 0xFFFF + | | | | | | | | |----> sending congestion window + | | | | | | | |-------> (ack.quick<<1)|ack.pingpong + | | | | | | |---------> Predicted tick of soft clock + | | | | | | (delayed ACK control data) + | | | | | |------------> retransmit timeout + | | | | |------------------> location of socket in memory + | | | |-----------------------> socket reference count + | | |-----------------------------> inode + | |----------------------------------> unanswered 0-window probes + |---------------------------------------------> uid + +timer_active: + 0 no timer is pending + 1 retransmit-timer is pending + 2 another timer (e.g. delayed ack or keepalive) is pending + 3 this is a socket in TIME_WAIT state. Not all fields will contain + data (or even exist) + 4 zero window probe timer is pending |