Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-17 02:36:21 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

mptcp: add mib for xmit window sharing

Browse Source 
Bump a counter for counter when snd_wnd is shared among subflow,
for observability's sake.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Paolo Abeni 2022-05-04 14:54:05 -07:00 committed by Jakub Kicinski
parent b713d00675
commit 92be2f5227
3 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
net/mptcp/mib.c
View File

@ -56,6 +56,7 @@ static const struct snmp_mib mptcp_snmp_list[] = {
SNMP_MIB_ITEM("RcvPruned", MPTCP_MIB_RCVPRUNED),
SNMP_MIB_ITEM("SubflowStale", MPTCP_MIB_SUBFLOWSTALE),
SNMP_MIB_ITEM("SubflowRecover", MPTCP_MIB_SUBFLOWRECOVER),
SNMP_MIB_ITEM("SndWndShared", MPTCP_MIB_SNDWNDSHARED),
SNMP_MIB_SENTINEL
};

1
net/mptcp/mib.h
View File

@ -49,6 +49,7 @@ enum linux_mptcp_mib_field {
MPTCP_MIB_RCVPRUNED, /* Incoming packet dropped due to memory limit */
MPTCP_MIB_SUBFLOWSTALE, /* Subflows entered 'stale' status */
MPTCP_MIB_SUBFLOWRECOVER, /* Subflows returned to active status after being stale */
MPTCP_MIB_SNDWNDSHARED, /* Subflow snd wnd is overridden by msk's one */
__MPTCP_MIB_MAX
};

4
net/mptcp/protocol.c
View File

@ -1153,8 +1153,10 @@ static int mptcp_check_allowed_size(const struct mptcp_sock *msk, struct sock *s
mptcp_snd_wnd = window_end - data_seq;
avail_size = min_t(unsigned int, mptcp_snd_wnd, avail_size);
if (unlikely(tcp_sk(ssk)->snd_wnd < mptcp_snd_wnd))
if (unlikely(tcp_sk(ssk)->snd_wnd < mptcp_snd_wnd)) {
tcp_sk(ssk)->snd_wnd = min_t(u64, U32_MAX, mptcp_snd_wnd);
MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_SNDWNDSHARED);
}
return avail_size;
}