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| author | Mark Fasheh <mfasheh@suse.com> | 2008-07-21 14:29:16 -0700 |
|---|---|---|
| committer | Mark Fasheh <mfasheh@suse.com> | 2008-10-13 13:57:57 -0700 |
| commit | 53da4939f349d4edd283b043219221ca5b78e4d4 (patch) | |
| tree | 3e0f8e1bd5474822431cffd1e449df9b639e1772 /fs/ocfs2/file.h | |
| parent | a447c0932445f92ce6f4c1bd020f62c5097a7842 (diff) | |
| download | lwn-53da4939f349d4edd283b043219221ca5b78e4d4.tar.gz lwn-53da4939f349d4edd283b043219221ca5b78e4d4.zip | |
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>
Diffstat (limited to 'fs/ocfs2/file.h')
| -rw-r--r-- | fs/ocfs2/file.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h index 1e27b4d017ea..5a6d3e48e4ba 100644 --- a/fs/ocfs2/file.h +++ b/fs/ocfs2/file.h @@ -28,6 +28,8 @@ extern const struct file_operations ocfs2_fops; extern const struct file_operations ocfs2_dops; +extern const struct file_operations ocfs2_fops_no_plocks; +extern const struct file_operations ocfs2_dops_no_plocks; extern const struct inode_operations ocfs2_file_iops; extern const struct inode_operations ocfs2_special_file_iops; struct ocfs2_alloc_context; |