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authorMark Fasheh <mfasheh@suse.com>2008-07-21 14:29:16 -0700
committerMark Fasheh <mfasheh@suse.com>2008-10-13 13:57:57 -0700
commit53da4939f349d4edd283b043219221ca5b78e4d4 (patch)
tree3e0f8e1bd5474822431cffd1e449df9b639e1772 /mm/mmap.c
parenta447c0932445f92ce6f4c1bd020f62c5097a7842 (diff)
downloadlinux-53da4939f349d4edd283b043219221ca5b78e4d4.tar.bz2
ocfs2: POSIX file locks support
This is actually pretty easy since fs/dlm already handles the bulk of the work. The Ocfs2 userspace cluster stack module already uses fs/dlm as the underlying lock manager, so I only had to add the right calls. Cluster-aware POSIX locks ("plocks") can be turned off by the same means at UNIX locks - mount with 'noflocks', or create a local-only Ocfs2 volume. Internally, the file system uses two sets of file_operations, depending on whether cluster aware plocks is required. This turns out to be easier than implementing local-only versions of ->lock. Signed-off-by: Mark Fasheh <mfasheh@suse.com>
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