net: make socket read/write_iter() honor IOCB_NOWAIT
to #28170604 commit ebfcd8955c0b52eb793bcbc9e71140e3d0cdb228 upstream The socket read/write helpers only look at the file O_NONBLOCK. not the iocb IOCB_NOWAIT flag. This breaks users like preadv2/pwritev2 and io_uring that rely on not having the file itself marked nonblocking, but rather the iocb itself. Cc: netdev@vger.kernel.org Acked-by: NDavid Miller <davem@davemloft.net> Signed-off-by: NJens Axboe <axboe@kernel.dk> Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com> Signed-off-by: NXiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
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