linux.git/fs/dlm/user.c, branch v2.6.26

dlm: add init and exit marks to init and exit functions

2008-02-07T05:41:22+00:00

it moves 365 bytes from .text to .init.text, and 30 bytes from .text to
.exit.text, saves memory.

Signed-off-by: Denis Cheng 
Signed-off-by: David Teigland

dlm: eliminate astparam type casting

2008-02-07T05:27:04+00:00

Put lkb_astparam in a union with a dlm_user_args pointer to
eliminate a lot of type casting.

Signed-off-by: David Teigland

dlm: dlm/user.c input validation fixes

2008-02-04T07:30:19+00:00

a) in device_write(): add sentinel NUL byte, making sure that lspace.name will
be NUL-terminated
b) in compat_input() be keep it simple about the amounts of data we are copying.

Signed-off-by: Al Viro 
Signed-off-by: David Teigland

dlm: static initialization improvements

2008-01-30T17:04:43+00:00

also change name_prefix from char pointer to char array.

Signed-off-by: Denis Cheng 
Signed-off-by: David Teigland

dlm: Sanity check namelen before copying it

2008-01-30T17:04:43+00:00

The 32/64 compatibility code in the DLM does not check the validity of
the lock name length passed into it, so it can easily overwrite memory
if the value is rubbish (as early versions of libdlm can cause with
unlock calls, it doesn't zero the field).

This patch restricts the length of the name to the amount of data
actually passed into the call.

Signed-off-by: Patrick Caulfield 
Signed-off-by: David Teigland

dlm: fix possible use-after-free

2008-01-30T17:04:42+00:00

The dlm_put_lkb() can free the lkb and its associated ua structure,
so we can't depend on using the ua struct after the put.

Signed-off-by: David Teigland

Use helpers to obtain task pid in printks

2007-10-19T18:53:43+00:00

The task_struct->pid member is going to be deprecated, so start
using the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in
the kernel.

The first thing to start with is the pid, printed to dmesg - in
this case we may safely use task_pid_nr(). Besides, printks produce
more (much more) than a half of all the explicit pid usage.

[akpm@linux-foundation.org: git-drm went and changed lots of stuff]
Signed-off-by: Pavel Emelyanov 
Cc: Dave Airlie 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[DLM] canceling deadlocked lock

2007-07-09T07:22:54+00:00

Add a function that can be used through libdlm by a system daemon to cancel
another process's deadlocked lock.  A completion ast with EDEADLK is returned
to the process waiting for the lock.

Signed-off-by: David Teigland 
Signed-off-by: Steven Whitehouse

[DLM] timeout fixes

2007-07-09T07:22:52+00:00

Various fixes related to the new timeout feature:
- add_timeout() missed setting TIMEWARN flag on lkb's when the
  TIMEOUT flag was already set
- clear_proc_locks should remove a dead process's locks from the
  timeout list
- the end-of-life calculation for user locks needs to consider that
  ETIMEDOUT is equivalent to -DLM_ECANCEL
- make initial default timewarn_cs config value visible in configfs
- change bit position of TIMEOUT_CANCEL flag so it's not copied to
  a remote master node
- set timestamp on remote lkb's so a lock dump will display the time
  they've been waiting

Signed-off-by: David Teigland 
Signed-off-by: Steven Whitehouse

[DLM] dlm_device interface changes [3/6]

2007-07-09T07:22:36+00:00

Change the user/kernel device interface used by libdlm:
- Add ability for userspace to check the version of the interface.  libdlm
  can now adapt to different versions of the kernel interface.
- Increase the size of the flags passed in a lock request so all possible
  flags can be used from userspace.
- Add an opaque "xid" value for each lock.  This "transaction id" will be
  used later to associate locks with each other during deadlock detection.
- Add a "timeout" value for each lock.  This is used along with the
  DLM_LKF_TIMEOUT flag.

Also, remove a fragment of unused code in device_read().

This patch requires updating libdlm which is backward compatible with
older kernels.

Signed-off-by: David Teigland 
Signed-off-by: Steven Whitehouse