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authorGoldwyn Rodrigues <rgoldwyn@suse.de>2014-01-22 00:48:32 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-22 01:19:42 +0100
commitc994c2ebdbbc391a42f177c8eb7882ebf3f142d8 (patch)
tree0f0240ae61f86140b0660ce224b1eff26d89ce3c /fs/ocfs2/move_extents.c
parentocfs2: framework for version LVB (diff)
downloadlinux-c994c2ebdbbc391a42f177c8eb7882ebf3f142d8.tar.xz
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ocfs2: use the new DLM operation callbacks while requesting new lockspace
Attempt to use the new DLM operations. If it is not supported, use the traditional ocfs2_controld. To exchange ocfs2 versioning, we use the LVB of the version dlm lock. It first attempts to take the lock in EX mode (non-blocking). If successful (which means it is the first mount), it writes the version number and downconverts to PR lock. If it is unsuccessful, it reads the version from the lock. If this becomes the standard (with o2cb as well), it could simplify userspace tools to check if the filesystem is mounted on other nodes. Dan: Since ocfs2_protocol_version are two u8 values, the additional checks with LONG* don't make sense. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/move_extents.c')
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