tun already checks for both O_NONBLOCK and IOCB_NOWAIT in its read
and write iter handlers, so it's fully ready for FMODE_NOWAIT. But
for some reason it doesn't set it. Rectify that oversight.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/3f7dc1f0-79ca-d85c-4d16-8c12c5bd492d@kernel.dk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
sock_set_flag(&tfile->sk, SOCK_ZEROCOPY);
+ /* tun groks IOCB_NOWAIT just fine, mark it as such */
+ file->f_mode |= FMODE_NOWAIT;
return 0;
}