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2010-04-23ocfs2_dlmfs: Fix math error when reading LVB.Joel Becker
When asked for a partial read of the LVB in a dlmfs file, we can accidentally calculate a negative count. Reported-by: Dan Carpenter <error27@gmail.com> Cc: <stable@kernel.org> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-03-30ocfs2_dlmfs: User DLM_* when decoding file open flags.Tao Ma
In commit 0016eedc4185a3cd7e578b027a6e69001b85d6c4, we have changed dlmfs to use stackglue. So when use DLM* when we decode dlm flags from open level. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-02-28ocfs2/userdlm: Add tracing in userdlmSunil Mushran
Make use of the newly added BASTS masklog to trace ASTs and BASTs in userdlm. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-02-26ocfs2_dlmfs: Enable the use of user cluster stacks.Joel Becker
Unlike ocfs2, dlmfs has no permanent storage. It can't store off a cluster stack it is supposed to be using. So it can't specify the stack name in ocfs2_cluster_connect(). Instead, we create ocfs2_cluster_connect_agnostic(), which simply uses the stack that is currently enabled. This is find for dlmfs, which will rely on the stack initialization. We add the "stackglue" capability to dlmfs's capability list. This lets userspace know dlmfs can be used with all cluster stacks. Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-02-26ocfs2_dlmfs: Use the stackglue.Joel Becker
Rather than directly using o2dlm, dlmfs can now use the stackglue. This allows it to use userspace cluster stacks and fs/dlm. This commit forces o2cb for now. A latter commit will bump the protocol version and allow non-o2cb stacks. This is one big sed, really. LKM_xxMODE becomes DLM_LOCK_xx. LKM_flag becomes DLM_LKF_flag. We also learn to check that the LVB is valid before reading it. Any DLM can lose the contents of the LVB during a complicated recovery. userdlm should be checking this. Now it does. dlmfs will return 0 from read(2) if the LVB was invalid. Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-02-26ocfs2_dlmfs: Don't honor truncate. The size of a dlmfs file is LVB_LENJoel Becker
We want folks using dlmfs to be able to use the LVB in places other than just write(2)/read(2). By ignoring truncate requests, we allow 'echo "contents" > /dlm/space/lockname' to work. Signed-off-by: Joel Becker <joel.becker@oracle.com>
2010-02-26ocfs2_dlmfs: Move to its own directoryJoel Becker
We're going to remove the tie between ocfs2_dlmfs and o2dlm. ocfs2_dlmfs doesn't belong in the fs/ocfs2/dlm directory anymore. Here we move it to fs/ocfs2/dlmfs. Signed-off-by: Joel Becker <joel.becker@oracle.com>