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io_uring: fix async accept on O_NONBLOCK sockets
Do not set REQ_F_NOWAIT if the socket is non blocking. When enabled this causes the accept to immediately post a CQE with EAGAIN, which means you cannot perform an accept SQE on a NONBLOCK socket asynchronously. By removing the flag if there is no pending accept then poll is armed as usual and when a connection comes in the CQE is posted. Signed-off-by: Dylan Yudaken <dylany@fb.com> Link: https://lore.kernel.org/r/20220324143435.2875844-1-dylany@fb.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -5602,9 +5602,6 @@ static int io_accept(struct io_kiocb *req, unsigned int issue_flags)
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struct file *file;
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int ret, fd;
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if (req->file->f_flags & O_NONBLOCK)
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req->flags |= REQ_F_NOWAIT;
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if (!fixed) {
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fd = __get_unused_fd_flags(accept->flags, accept->nofile);
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if (unlikely(fd < 0))
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