[DLM] dlm_device interface changes [3/6]

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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 <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

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This commit is contained in:

David Teigland 2007-05-18 09:00:32 -05:00 • committed by Steven Whitehouse

parent 3ae1acf93a

commit d7db923ea4

5 changed files with 77 additions and 29 deletions

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2

fs/dlm/dlm_internal.h

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24

fs/dlm/lock.c

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6

fs/dlm/lock.h

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53

fs/dlm/user.c

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21

include/linux/dlm_device.h

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