73411e09d0
commit 2ca06a2f65310aeef30bb69b7405437a14766e4d upstream. mptcp_cleanup_rbuf() is responsible to send acks when the user-space reads enough data to update the receive windows significantly. It tries hard to avoid acquiring the subflow sockets locks by checking conditions similar to the ones implemented at the TCP level. To avoid too much code duplication - the MPTCP protocol can't reuse the TCP helpers as part of the relevant status is maintained into the msk socket - and multiple costly window size computation, mptcp_cleanup_rbuf uses a rough estimate for the most recently advertised window size: the MPTCP receive free space, as recorded as at last-ack time. Unfortunately the above does not allow mptcp_cleanup_rbuf() to detect a zero to non-zero win change in some corner cases, skipping the tcp_cleanup_rbuf call and leaving the peer stuck. After commit |
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| .. | ||
| bpf.c | ||
| crypto_test.c | ||
| crypto.c | ||
| ctrl.c | ||
| diag.c | ||
| Kconfig | ||
| Makefile | ||
| mib.c | ||
| mib.h | ||
| mptcp_diag.c | ||
| options.c | ||
| pm_netlink.c | ||
| pm_userspace.c | ||
| pm.c | ||
| protocol.c | ||
| protocol.h | ||
| sockopt.c | ||
| subflow.c | ||
| syncookies.c | ||
| token_test.c | ||
| token.c | ||