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07c2c7a3b6
linux/net/mptcp
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Paolo Abeni 07c2c7a3b6 mptcp: accurate SIOCOUTQ for fallback socket 
The MPTCP SIOCOUTQ implementation is not very accurate in
case of fallback: it only measures the data in the MPTCP-level
write queue, but it does not take in account the subflow
write queue utilization. In case of fallback the first can be
empty, while the latter is not.

The above produces sporadic self-tests issues and can foul
legit user-space application.

Fix the issue additionally querying the subflow in case of fallback.

Fixes: 644807e3e4 ("mptcp: add SIOCINQ, OUTQ and OUTQNSD ioctls")
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/260
Reported-by: Matthieu Baerts <matthieu.baerts@tessares.net>
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>
2022-02-24 21:54:53 -08:00
..
crypto_test.c mptcp: move crypto test to KUNIT 2020-06-26 16:21:39 -07:00
crypto.c kunit: mptcp: adhere to KUNIT formatting standard 2021-04-16 17:10:40 -07:00
ctrl.c mptcp: faster active backup recovery 2021-08-14 11:37:25 +01:00
diag.c mptcp: allow dumping subflow context to userspace 2020-03-29 22:14:48 -07:00
Kconfig kunit: mptcp: adhere to KUNIT formatting standard 2021-04-16 17:10:40 -07:00
Makefile kunit: mptcp: adhere to KUNIT formatting standard 2021-04-16 17:10:40 -07:00
mib.c mptcp: add mibs counter for ignored incoming options 2022-02-19 12:28:00 +00:00
mib.h mptcp: add mibs counter for ignored incoming options 2022-02-19 12:28:00 +00:00
mptcp_diag.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-09-30 14:49:21 -07:00
options.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-01-09 17:00:17 -08:00
pm_netlink.c mptcp: fix race in incoming ADD_ADDR option processing 2022-02-19 12:28:00 +00:00
pm.c mptcp: add mibs counter for ignored incoming options 2022-02-19 12:28:00 +00:00
protocol.c mptcp: accurate SIOCOUTQ for fallback socket 2022-02-24 21:54:53 -08:00
protocol.h mptcp: Use struct_group() to avoid cross-field memset() 2022-01-21 19:26:03 -08:00
sockopt.c mptcp: cleanup MPJ subflow list handling 2022-01-07 11:27:07 +00:00
subflow.c mptcp: reuse __mptcp_make_csum in validate_data_csum 2022-01-07 19:00:44 -08:00
syncookies.c mptcp: don't return sockets in foreign netns 2021-09-24 10:51:36 +01:00
token_test.c mptcp: don't return sockets in foreign netns 2021-09-24 10:51:36 +01:00
token.c mptcp: full disconnect implementation 2022-01-07 11:27:06 +00:00