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authorPaolo Abeni <pabeni@redhat.com>2020-12-16 14:48:35 +0300
committerJakub Kicinski <kuba@kernel.org>2020-12-17 21:24:47 +0300
commit13e1603739e58e94e7a3c24191fa2dcd1a8a5df3 (patch)
treea9b0f58d59f988a5b21653f7cc648fd99043251b /net
parent219d04992b689e0498ece02d2a451f2b6e2563a9 (diff)
downloadlinux-13e1603739e58e94e7a3c24191fa2dcd1a8a5df3.tar.xz
mptcp: fix pending data accounting
When sendmsg() needs to wait for memory, the pending data is not updated. That causes a drift in forward memory allocation, leading to stall and/or warnings at socket close time. This change addresses the above issue moving the pending data counter update inside the sendmsg() main loop. Fixes: 6e628cd3a8f7 ("mptcp: use mptcp release_cb for delayed tasks") Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
-rw-r--r--net/mptcp/protocol.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index b53a91801a6c..09b19aa2f205 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1658,6 +1658,7 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
frag_truesize += psize;
pfrag->offset += frag_truesize;
WRITE_ONCE(msk->write_seq, msk->write_seq + psize);
+ msk->tx_pending_data += psize;
/* charge data on mptcp pending queue to the msk socket
* Note: we charge such data both to sk and ssk
@@ -1683,10 +1684,8 @@ wait_for_memory:
goto out;
}
- if (copied) {
- msk->tx_pending_data += copied;
+ if (copied)
mptcp_push_pending(sk, msg->msg_flags);
- }
out:
release_sock(sk);