linux-toradex.git/include/linux/tty.h, branch v2.6.26-rc5

tty: add throttle/unthrottle helpers

2008-04-30T15:29:47+00:00

Something Arjan suggested which allows us to clean up the code nicely

Signed-off-by: Alan Cox 
Cc: Arjan van de Ven 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

tty: The big operations rework

2008-04-30T15:29:47+00:00

- Operations are now a shared const function block as with most other Linux
  objects

- Introduce wrappers for some optional functions to get consistent behaviour

- Wrap put_char which used to be patched by the tty layer

- Document which functions are needed/optional

- Make put_char report success/fail

- Cache the driver->ops pointer in the tty as tty->ops

- Remove various surplus lock calls we no longer need

- Remove proc_write method as noted by Alexey Dobriyan

- Introduce some missing sanity checks where certain driver/ldisc
  combinations would oops as they didn't check needed methods were present

[akpm@linux-foundation.org: fix fs/compat_ioctl.c build]
[akpm@linux-foundation.org: fix isicom]
[akpm@linux-foundation.org: fix arch/ia64/hp/sim/simserial.c build]
[akpm@linux-foundation.org: fix kgdb]
Signed-off-by: Alan Cox 
Acked-by: Greg Kroah-Hartman 
Cc: Jason Wessel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

tty_io: fix remaining pid struct locking

2008-04-30T15:29:40+00:00

This fixes the last couple of pid struct locking failures I know about.

[oleg@tv-sign.ru: clean up do_task_stat()]
Signed-off-by: Alan Cox 
Signed-off-by: Oleg Nesterov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

redo locking of tty->pgrp

2008-04-30T15:29:40+00:00

Historically tty->pgrp and friends were pid_t and the code "knew" they were
safe.  The change to pid structs opened up a few races and the removal of the
BKL in places made them quite hittable.  We put tty->pgrp under the ctrl_lock
for the tty.

Signed-off-by: Alan Cox 
Cc: Oleg Nesterov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

tty: BKL pushdown

2008-04-30T15:29:40+00:00

- Push the BKL down into the line disciplines
- Switch the tty layer to unlocked_ioctl
- Introduce a new ctrl_lock spin lock for the control bits
- Eliminate much of the lock_kernel use in n_tty
- Prepare to (but don't yet) call the drivers with the lock dropped
  on the paths that historically held the lock

BKL now primarily protects open/close/ldisc change in the tty layer

[jirislaby@gmail.com: a couple of fixes]
Signed-off-by: Alan Cox 
Signed-off-by: Jiri Slaby 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[patch 1/2] audit: let userspace fully control TTY input auditing

2008-04-28T10:28:24+00:00

Remove the code that automatically disables TTY input auditing in processes
that open TTYs when they have no other TTY open; this heuristic was
intended to automatically handle daemons, but it has false positives (e.g.
with sshd) that make it impossible to control TTY input auditing from a PAM
module.  With this patch, TTY input auditing is controlled from user-space
only.

On the other hand, not even for daemons does it make sense to audit "input"
from PTY masters; this data was produced by a program writing to the PTY
slave, and does not represent data entered by the user.

Signed-off-by: Miloslav Trmac 
Cc: Al Viro 
Cc: David Woodhouse 
Signed-off-by: Andrew Morton 
Signed-off-by: Al Viro

Audit: collect sessionid in netlink messages

2008-04-28T10:18:03+00:00

Previously I added sessionid output to all audit messages where it was
available but we still didn't know the sessionid of the sender of
netlink messages.  This patch adds that information to netlink messages
so we can audit who sent netlink messages.

Signed-off-by: Eric Paris 
Signed-off-by: Al Viro

tty: Kill TTY_FLIPBUF_SIZE

2008-02-07T16:42:16+00:00

This legacy define from the old buffer code is now only used in a single
power pc driver than doesn't compile anyway.

Signed-off-by: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers/char/tty_io.c: remove pty_sem

2008-02-06T18:41:07+00:00

I couldn't find any users, so removing it..

Signed-off-by: Daniel Walker 
Acked-by: Alan Cox 
Cc: "H. Peter Anvin" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[CAN]: Allocate protocol numbers for PF_CAN

2008-01-28T22:54:09+00:00

This patch adds a protocol/address family number, ARP hardware type,
ethernet packet type, and a line discipline number for the SocketCAN
implementation.

Signed-off-by: Oliver Hartkopp 
Signed-off-by: Urs Thuermann 
Signed-off-by: David S. Miller