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authorChristoph Hellwig <hch@lst.de>2018-07-17 16:51:51 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2018-07-30 07:57:48 -0700
commit51d626903083f7bd651d38b031775740ed41758c (patch)
treed9f2de99b862d7723dd848e7bc84c112de68f247 /fs/xfs/xfs_inode.h
parent3ba738df25239f877f6a98ce1cc925fa7e924cd3 (diff)
xfs: introduce a new xfs_inode_has_cow_data helper
We have a few places that already check if an inode has actual data in the COW fork to avoid work on reflink inodes that do not actually have outstanding COW blocks. There are a few more places that can avoid working if doing the same check, so add a documented helper for this condition and use it in all places where it makes sense. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_inode.h')
-rw-r--r--fs/xfs/xfs_inode.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index a67efdac70a6..79a3e61a6991 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -199,6 +199,15 @@ static inline bool xfs_is_reflink_inode(struct xfs_inode *ip)
}
/*
+ * Check if an inode has any data in the COW fork. This might be often false
+ * even for inodes with the reflink flag when there is no pending COW operation.
+ */
+static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip)
+{
+ return ip->i_cowfp && ip->i_cowfp->if_bytes;
+}
+
+/*
* In-core inode flags.
*/
#define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */