aboutsummaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorPaolo Abeni2021-03-04 13:32:15 -0800
committerDavid S. Miller2021-03-04 14:30:13 -0800
commit417789df4a03bc820b082bcc503f0d4c5e4704b9 (patch)
tree05dd87043d6569a5a620246e790116f6c6e6e419 /net
parentc2e6048fa1cf2228063aec299f93ac6eb256b457 (diff)
mptcp: fix missing wakeup
__mptcp_clean_una() can free write memory and should wake-up user-space processes when needed. When such function is invoked by the MPTCP receive path, the wakeup is not needed, as the TCP stack will later trigger subflow_write_space which will do the wakeup as needed. Other __mptcp_clean_una() call sites need an additional wakeup check Let's bundle the relevant code in a new helper and use it. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/165 Fixes: 6e628cd3a8f7 ("mptcp: use mptcp release_cb for delayed tasks") Fixes: 64b9cea7a0af ("mptcp: fix spurious retransmissions") Tested-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: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/mptcp/protocol.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index d2a2169e6d9e..76958570ae7f 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1061,6 +1061,12 @@ out:
}
}
+static void __mptcp_clean_una_wakeup(struct sock *sk)
+{
+ __mptcp_clean_una(sk);
+ mptcp_write_space(sk);
+}
+
static void mptcp_enter_memory_pressure(struct sock *sk)
{
struct mptcp_subflow_context *subflow;
@@ -2270,7 +2276,7 @@ static void __mptcp_retrans(struct sock *sk)
struct sock *ssk;
int ret;
- __mptcp_clean_una(sk);
+ __mptcp_clean_una_wakeup(sk);
dfrag = mptcp_rtx_head(sk);
if (!dfrag)
return;
@@ -2983,7 +2989,7 @@ static void mptcp_release_cb(struct sock *sk)
}
if (test_and_clear_bit(MPTCP_CLEAN_UNA, &mptcp_sk(sk)->flags))
- __mptcp_clean_una(sk);
+ __mptcp_clean_una_wakeup(sk);
if (test_and_clear_bit(MPTCP_ERROR_REPORT, &mptcp_sk(sk)->flags))
__mptcp_error_report(sk);