1 files changed, 8 insertions, 82 deletions

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 2ce302b4885f..b240ea5241dc 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -24,6 +24,7 @@
 #include "xfs_pnfs.h"
 #include "xfs_iomap.h"
 #include "xfs_reflink.h"
+#include "xfs_file.h"
 
 #include <linux/dax.h>
 #include <linux/falloc.h>
@@ -38,33 +39,19 @@ static const struct vm_operations_struct xfs_file_vm_ops;
  * Decide if the given file range is aligned to the size of the fundamental
  * allocation unit for the file.
  */
-static bool
+bool
 xfs_is_falloc_aligned(
 	struct xfs_inode	*ip,
 	loff_t			pos,
 	long long int		len)
 {
-	struct xfs_mount	*mp = ip->i_mount;
-	uint64_t		mask;
-
-	if (XFS_IS_REALTIME_INODE(ip)) {
-		if (!is_power_of_2(mp->m_sb.sb_rextsize)) {
-			u64	rextbytes;
-			u32	mod;
-
-			rextbytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
-			div_u64_rem(pos, rextbytes, &mod);
-			if (mod)
-				return false;
-			div_u64_rem(len, rextbytes, &mod);
-			return mod == 0;
-		}
-		mask = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize) - 1;
-	} else {
-		mask = mp->m_sb.sb_blocksize - 1;
-	}
+	unsigned int		alloc_unit = xfs_inode_alloc_unitsize(ip);
+
+	if (!is_power_of_2(alloc_unit))
+		return isaligned_64(pos, alloc_unit) &&
+		       isaligned_64(len, alloc_unit);
 
-	return !((pos | len) & mask);
+	return !((pos | len) & (alloc_unit - 1));
 }
 
 /*
@@ -861,67 +848,6 @@ xfs_file_write_iter(
 	return xfs_file_buffered_write(iocb, from);
 }
 
-static void
-xfs_wait_dax_page(
-	struct inode		*inode)
-{
-	struct xfs_inode        *ip = XFS_I(inode);
-
-	xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
-	schedule();
-	xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
-}
-
-int
-xfs_break_dax_layouts(
-	struct inode		*inode,
-	bool			*retry)
-{
-	struct page		*page;
-
-	xfs_assert_ilocked(XFS_I(inode), XFS_MMAPLOCK_EXCL);
-
-	page = dax_layout_busy_page(inode->i_mapping);
-	if (!page)
-		return 0;
-
-	*retry = true;
-	return ___wait_var_event(&page->_refcount,
-			atomic_read(&page->_refcount) == 1, TASK_INTERRUPTIBLE,
-			0, 0, xfs_wait_dax_page(inode));
-}
-
-int
-xfs_break_layouts(
-	struct inode		*inode,
-	uint			*iolock,
-	enum layout_break_reason reason)
-{
-	bool			retry;
-	int			error;
-
-	xfs_assert_ilocked(XFS_I(inode), XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL);
-
-	do {
-		retry = false;
-		switch (reason) {
-		case BREAK_UNMAP:
-			error = xfs_break_dax_layouts(inode, &retry);
-			if (error || retry)
-				break;
-			fallthrough;
-		case BREAK_WRITE:
-			error = xfs_break_leased_layouts(inode, iolock, &retry);
-			break;
-		default:
-			WARN_ON_ONCE(1);
-			error = -EINVAL;
-		}
-	} while (error == 0 && retry);
-
-	return error;
-}
-
 /* Does this file, inode, or mount want synchronous writes? */
 static inline bool xfs_file_sync_writes(struct file *filp)
 {