tcp_splice: Refactor tcp_splice_conn_epoll_events() to per-side computation

The function tcp_splice_conn_epoll_events() currently takes an array of
struct epoll_event and fills in the .events field for both sides using
flow_foreach_sidei() loops.

This works, but the function is doing two conceptually separate things
at once: computing events for side 0 and computing events for side 1.
The OUT_WAIT handling is particularly subtle, as it has cross-side
effects: when OUT_WAIT(sidei) is set, we add EPOLLOUT to ev[sidei] but
also remove EPOLLIN from ev[!sidei].

Refactor to make the function compute events for a single side at a
time, taking sidei as a parameter and returning uint32_t. This makes
the logic more focused and easier to follow. The cross-side effects of
OUT_WAIT are preserved by checking both OUT_WAIT(sidei) and
OUT_WAIT(!sidei) within each call.

The caller tcp_splice_epoll_ctl() now invokes the function twice, once
for each side, making the two-sided nature of the operation explicit.

No functional change.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

0 files changed, 0 insertions, 0 deletions