tcp: cleanup timer creation

Refactor tcp_timer_ctl() to use the epoll_add() helper instead of
manually constructing epoll_event and calling epoll_ctl() directly.

Also separate the error handling for timerfd_create() failure (-1)
from fd overflow (> FD_REF_MAX) to provide more specific debug
messages. The overflow case now logs the actual fd value, using
flow_dbg_perror() in this case was not correct (no errno set).

Delay setting conn->timer until epoll_add() succeeds, removing
redundant conn->timer = -1 assignments in error paths since the
timer is already -1 when we enter this block.

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