mptcp: move page frag allocation in mptcp_sendmsg()

Browse source

mptcp_sendmsg() is refactored so that first it copies
the data provided from user space into the send queue,
and then tries to spool the send queue via sendmsg_frag.

There a subtle change in the mptcp level collapsing on
consecutive data fragment: we now allow that only on unsent
data.

The latter don't need to deal with msghdr data anymore
and can be simplified in a relevant way.

snd_nxt and write_seq are now tracked independently.

Overall this allows some relevant cleanup and will
allow sending pending mptcp data on msk una update in
later patch.

Co-developed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Paolo Abeni 2020-11-16 10:48:10 +01:00 • committed by Jakub Kicinski

parent e16163b6e2

commit d9ca1de8c0

1 changed files with 189 additions and 217 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

420

net/mptcp/protocol.c

View file