lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:	Thu, 28 Aug 2008 09:47:18 +0200
From:	Denis Joseph Barrow <>
To:	Alan Cox <>
CC:	Jeff Garzik <>,,
	Linux USB kernel mailing list <>,,
Subject: Re: question wrt /drivers/char/tty_io.c in pre 2.6.16 code

Thanks Greg/Alan,
As for maintaining 2 and a half year old distros that's my job.
I think I figured out a way of doing the flow control.
I need to wrap the line discipline function pointer
disc->ops->receive_buf(tty, char_buf,flag_buf, count);
in /drivers/char/tty_io.c for my hso driver anyway
I can put in a counter in this wrapper decrementing
the buffers full & increment the counter each time
I call tty_flip_buffer_push(tty); which I will only
do if there are less than 2 buffers busy.

If this idea is plain wrong let me know.

Alan Cox wrote:
>> The new tty_insert_flip_string returns the
>> number of bytes successfully copied to tty recieve buffers
>> how do I implement this functionality in pre 2.6.16 code,
>> can it be done?
> Probably but it'll be really ugly. You need to stick your nose into the
> innards of struct tty_struct and check the space left in the current flip
> buffer entry.
> What you do if it is full is another question.
> Alan.

best regards,
D.J. Barrow
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists