kernel.git/fs/dlm/user.c, branch linux-2.6.33.y

dlm: always use GFP_NOFS

2009-11-30T22:34:43Z

Replace all GFP_KERNEL and ls_allocation with GFP_NOFS. ls_allocation would be GFP_KERNEL for userland lockspaces and GFP_NOFS for file system lockspaces. It was discovered that any lockspaces on the system can affect all others by triggering memory reclaim in the file system which could in turn call back into the dlm to acquire locks, deadlocking dlm threads that were shared by all lockspaces, like dlm_recv. Signed-off-by: David Teigland

dlm: fix length calculation in compat code

2009-03-11T17:23:59Z

Using offsetof() to calculate name length does not work because it does not produce consistent results with with structure packing. This caused memcpy to corrupt memory by copying 4 extra bytes off the end of the buffer on 64 bit kernels with 32 bit userspace (the only case where this 32/64 compat code is used). The fix is to calculate name length directly from the start instead of trying to derive it later using count and offsetof. Signed-off-by: David Teigland

dlm: improve how bast mode handling

2008-12-23T16:16:46Z

The lkb bastmode value is set in the context of processing the lock, and read by the dlm_astd thread. Because it's accessed in these two separate contexts, the writing/reading ought to be done under a lock. This is simple to do by setting it and reading it when the lkb is added to and removed from dlm_astd's callback list which is properly locked. Signed-off-by: David Teigland

dlm: remove bkl

2008-09-04T17:55:13Z

BLK from recent pushdown is not needed. Signed-off-by: David Teigland

dlm: detect available userspace daemon

2008-08-28T16:49:43Z

If dlm_controld (the userspace daemon that controls the setup and recovery of the dlm) fails, the kernel should shut down the lockspaces in the kernel rather than leaving them running. This is detected by having dlm_controld hold a misc device open while running, and if the kernel detects a close while the daemon is still needed, it stops the lockspaces in the kernel. Knowing that the userspace daemon isn't running also allows the lockspace create/remove routines to avoid waiting on the daemon for join/leave operations. Signed-off-by: David Teigland

dlm: allow multiple lockspace creates

2008-08-28T16:49:15Z

Add a count for lockspace create and release so that create can be called multiple times to use the lockspace from different places. Also add the new flag DLM_LSFL_NEWEXCL to create a lockspace with the previous behavior of returning -EEXIST if the lockspace already exists. Signed-off-by: David Teigland

dlm: add missing kfrees

2008-08-13T17:47:36Z

A couple of unlikely error conditions were missing a kfree on the error exit path. Reported-by: Juha Leppanen Signed-off-by: David Teigland

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm

2008-07-28T16:46:00Z

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm: dlm: fix uninitialized variable for search_rsb_list callers dlm: release socket on error dlm: fix basts for granted CW waiting PR/CW dlm: check for null in device_write

dlm: check for null in device_write

2008-07-14T18:56:59Z

If `device_write' method is called via "dlm-control", file->private_data is NULL. (See ctl_device_open() in user.c. ) Through proc->flags is read. Signed-off-by: Masatake YAMATO Signed-off-by: David Teigland

dlm-user: BKL pushdown

2008-06-20T20:05:56Z

Signed-off-by: Arnd Bergmann