diff options
| author |   Mat Martineau <mathew.j.martineau@linux.intel.com> | 2022-05-18 15:04:45 -0700 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2022-05-19 20:05:07 -0700 |
| commit | d9fb797046c596187b97a08ea88b954964cc2d33 (patch) | |
| tree | 9a5899c760f46b2a47edc093c5e01c07841e4a3e /net/mptcp/protocol.h | |
| parent | mptcp: Check for orphaned subflow before handling MP_FAIL timer (diff) | |
| download | linux-dev-d9fb797046c596187b97a08ea88b954964cc2d33.tar.xz linux-dev-d9fb797046c596187b97a08ea88b954964cc2d33.zip | |
mptcp: Do not traverse the subflow connection list without lock
The MPTCP socket's conn_list (list of subflows) requires the socket lock
to access. The MP_FAIL timeout code added such an access, where it would
check the list of subflows both in timer context and (later) in workqueue
context where the socket lock is held.
Rather than check the list twice, remove the check in the timeout
handler and only depend on the check in the workqueue. Also remove the
MPTCP_FAIL_NO_RESPONSE flag, since mptcp_mp_fail_no_response() has
insignificant overhead and can be checked on each worker run.
Fixes: 49fa1919d6bc ("mptcp: reset subflow when MP_FAIL doesn't respond")
Reported-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-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>
Diffstat (limited to 'net/mptcp/protocol.h')
| -rw-r--r-- | net/mptcp/protocol.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index fb4760ee8d47..200f89f6d62f 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -117,7 +117,6 @@ #define MPTCP_WORK_EOF 3 #define MPTCP_FALLBACK_DONE 4 #define MPTCP_WORK_CLOSE_SUBFLOW 5 -#define MPTCP_FAIL_NO_RESPONSE 6 /* MPTCP socket release cb flags */ #define MPTCP_PUSH_PENDING 1 |