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Commit f9369729 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Dave Chinner
Browse files

xfs: improve xfs_isilocked 



Use rwsem_is_locked to make the assertations for shared locks work.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
parent 070ecdca

fs/xfs/xfs_iget.c

+10 −16
Original line number Diff line number Diff line
@@ -741,30 +741,24 @@ xfs_ilock_demote( 
}



#ifdef DEBUG

/*

 * Debug-only routine, without additional rw_semaphore APIs, we can

 * now only answer requests regarding whether we hold the lock for write

 * (reader state is outside our visibility, we only track writer state).

 *

 * Note: this means !xfs_isilocked would give false positives, so don't do that.

 */

int

xfs_isilocked(

	xfs_inode_t		*ip,

	uint			lock_flags)

{

	if ((lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) ==

			XFS_ILOCK_EXCL) {

		if (!ip->i_lock.mr_writer)

			return 0;

	if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) {

		if (!(lock_flags & XFS_ILOCK_SHARED))

			return !!ip->i_lock.mr_writer;

		return rwsem_is_locked(&ip->i_lock.mr_lock);

	}



	if ((lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) ==

			XFS_IOLOCK_EXCL) {

		if (!ip->i_iolock.mr_writer)

			return 0;

	if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) {

		if (!(lock_flags & XFS_IOLOCK_SHARED))

			return !!ip->i_iolock.mr_writer;

		return rwsem_is_locked(&ip->i_iolock.mr_lock);

	}



	return 1;

	ASSERT(0);

	return 0;

}

#endif