Jeff Layton 516fac1e07
filelock: new helper: vfs_inode_has_locks ...
[ Upstream commit ab1ddef98a715eddb65309ffa83267e4e84a571e ]
Ceph has a need to know whether a particular inode has any locks set on
it. It's currently tracking that by a num_locks field in its
filp->private_data, but that's problematic as it tries to decrement this
field when releasing locks and that can race with the file being torn
down.
Add a new vfs_inode_has_locks helper that just returns whether any locks
are currently held on the inode.
Reviewed-by: Xiubo Li <xiubli@redhat.com >
Reviewed-by: Christoph Hellwig <hch@infradead.org >
Signed-off-by: Jeff Layton <jlayton@kernel.org >
Stable-dep-of: 461ab10ef7e6 ("ceph: switch to vfs_inode_has_locks() to fix file lock bug")
Signed-off-by: Sasha Levin <sashal@kernel.org >
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516fac1e07