diff options
| author | Florian Westphal <fw@strlen.de> | 2020-05-16 10:46:21 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-17 12:35:34 -0700 |
| commit | 17091708d1e503383f20934631305ccb375b0eb1 (patch) | |
| tree | a5c79670b8f145d1dd6074de1df7dd512fbb1d05 /net/mptcp | |
| parent | 149f7c71e2c710a8ced836421a631953c9f84aa3 (diff) | |
mptcp: fill skb page frag cache outside of mptcp_sendmsg_frag
The mptcp_sendmsg_frag helper contains a loop that will wait on the
subflow sk.
It seems preferrable to only wait in mptcp_sendmsg() when blocking io is
requested. mptcp_sendmsg already has such a wait loop that is used when
no subflow socket is available for transmission.
This is another preparation patch that makes sure we call
mptcp_sendmsg_frag only if the page frag cache has been refilled.
Followup patch will remove the wait loop from mptcp_sendmsg_frag().
The retransmit worker doesn't need to do this refill as it won't
transmit new mptcp-level data.
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mptcp')
| -rw-r--r-- | net/mptcp/protocol.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 1bdfbca1c23a..a11e51222e59 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -713,6 +713,7 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) { int mss_now = 0, size_goal = 0, ret = 0; struct mptcp_sock *msk = mptcp_sk(sk); + struct page_frag *pfrag; struct socket *ssock; size_t copied = 0; struct sock *ssk; @@ -741,13 +742,16 @@ fallback: return ret >= 0 ? ret + copied : (copied ? copied : ret); } + pfrag = sk_page_frag(sk); restart: mptcp_clean_una(sk); wait_for_sndbuf: __mptcp_flush_join_list(msk); ssk = mptcp_subflow_get_send(msk); - while (!sk_stream_memory_free(sk) || !ssk) { + while (!sk_stream_memory_free(sk) || + !ssk || + !mptcp_page_frag_refill(ssk, pfrag)) { if (ssk) { /* make sure retransmit timer is * running before we wait for memory. @@ -808,6 +812,7 @@ wait_for_sndbuf: break; if (!sk_stream_memory_free(ssk) || + !mptcp_page_frag_refill(ssk, pfrag) || !mptcp_ext_cache_refill(msk)) { set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); tcp_push(ssk, msg->msg_flags, mss_now, |