xfs: unshare a range of blocks via fallocate
Unshare all shared extents if the user calls fallocate with the new
unshare mode flag set, so that we can guarantee that a subsequent
write will not ENOSPC.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
[hch: pass inode instead of file to xfs_reflink_dirty_range,
use iomap infrastructure for copy up]
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/xfs/xfs_reflink.h b/fs/xfs/xfs_reflink.h
index df82b20..bade5a6 100644
--- a/fs/xfs/xfs_reflink.h
+++ b/fs/xfs/xfs_reflink.h
@@ -48,5 +48,9 @@
extern int xfs_reflink_remap_range(struct xfs_inode *src, xfs_off_t srcoff,
struct xfs_inode *dest, xfs_off_t destoff, xfs_off_t len,
unsigned int flags);
+extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
+ struct xfs_trans **tpp);
+extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
+ xfs_off_t len);
#endif /* __XFS_REFLINK_H */