Jens Axboe wrote:
>>
>>> - retval = in_file->f_op->sendfile(in_file, ppos, count, file_send_actor,
>>> out_file);
>>> + fl = 0;
>>> + if (in_file->f_flags & O_NONBLOCK)
>>> + fl = SPLICE_F_NONBLOCK;
>>> +
>>> + retval = do_splice_direct(in_file, ppos, out_file, count, fl);
>> I like this, but are you sure it wont break user land ?
>>
>> Some applications might react badly if sendfile() returns EAGAIN ?
>
> Yeah, I didn't actually intend for that to sneak in. I'd think that
> userspace should handle it if they opened the file O_NONBLOCK (or used
> fcntl()), but it's a change in behaviour none the less and probably not
> a good idea.
>
I would personally argue that sendfile() blocking on an O_NONBLOCK
desriptor, as opposed to returning EAGAIN, is a bug, and a fairly
serious such.
-hpa
-
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