xfs: make xfs_iroot_realloc a bmap btree function

Move the inode fork btree root reallocation function part of the btree
ops because it's now mostly bmbt-specific code.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

1 files changed, 0 insertions, 96 deletions

diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c
index 53bfdf422ad8..60853bac289a 100644
--- a/fs/xfs/libxfs/xfs_inode_fork.c
+++ b/fs/xfs/libxfs/xfs_inode_fork.c
@@ -423,102 +423,6 @@ xfs_broot_realloc(
 }
 
 /*
- * Reallocate the space for if_broot based on the number of records.  Move the
- * records and pointers in if_broot to fit the new size.  When shrinking this
- * will eliminate holes between the records and pointers created by the caller.
- * When growing this will create holes to be filled in by the caller.
- *
- * The caller must not request to add more records than would fit in
- * the on-disk inode root.  If the if_broot is currently NULL, then
- * if we are adding records, one will be allocated.  The caller must also
- * not request that the number of records go below zero, although
- * it can go to zero.
- *
- * ip -- the inode whose if_broot area is changing
- * whichfork -- which inode fork to change
- * new_numrecs -- the new number of records requested for the if_broot array
- *
- * Returns the incore btree root block.
- */
-struct xfs_btree_block *
-xfs_iroot_realloc(
-	struct xfs_inode	*ip,
-	int			whichfork,
-	unsigned int		new_numrecs)
-{
-	struct xfs_mount	*mp = ip->i_mount;
-	struct xfs_ifork	*ifp = xfs_ifork_ptr(ip, whichfork);
-	char			*np;
-	char			*op;
-	unsigned int		new_size;
-	unsigned int		old_size = ifp->if_broot_bytes;
-
-	/*
-	 * Block mapping btrees do not support storing zero records; if this
-	 * happens, the fork is being changed to FMT_EXTENTS.  Free the broot
-	 * and get out.
-	 */
-	if (new_numrecs == 0)
-		return xfs_broot_realloc(ifp, 0);
-
-	new_size = xfs_bmap_broot_space_calc(mp, new_numrecs);
-
-	/* Handle the nop case quietly. */
-	if (new_size == old_size)
-		return ifp->if_broot;
-
-	if (new_size > old_size) {
-		unsigned int	old_numrecs;
-
-		/*
-		 * If there wasn't any memory allocated before, just
-		 * allocate it now and get out.
-		 */
-		if (old_size == 0)
-			return xfs_broot_realloc(ifp, new_size);
-
-		/*
-		 * If there is already an existing if_broot, then we need
-		 * to realloc() it and shift the pointers to their new
-		 * location.  The records don't change location because
-		 * they are kept butted up against the btree block header.
-		 */
-		old_numrecs = xfs_bmbt_maxrecs(mp, old_size, false);
-		xfs_broot_realloc(ifp, new_size);
-		op = (char *)xfs_bmap_broot_ptr_addr(mp, ifp->if_broot, 1,
-						     old_size);
-		np = (char *)xfs_bmap_broot_ptr_addr(mp, ifp->if_broot, 1,
-						     (int)new_size);
-		ASSERT(xfs_bmap_bmdr_space(ifp->if_broot) <=
-			xfs_inode_fork_size(ip, whichfork));
-		memmove(np, op, old_numrecs * (uint)sizeof(xfs_fsblock_t));
-		return ifp->if_broot;
-	}
-
-	/*
-	 * We're reducing, but not totally eliminating, numrecs.  In this case,
-	 * we are shrinking the if_broot buffer, so it must already exist.
-	 */
-	ASSERT(ifp->if_broot != NULL && old_size > 0 && new_size > 0);
-
-	/*
-	 * Shrink the btree root by moving the bmbt pointers, since they are
-	 * not butted up against the btree block header, then reallocating
-	 * broot.
-	 */
-	op = (char *)xfs_bmap_broot_ptr_addr(mp, ifp->if_broot, 1, old_size);
-	np = (char *)xfs_bmap_broot_ptr_addr(mp, ifp->if_broot, 1,
-					     (int)new_size);
-	memmove(np, op, new_numrecs * (uint)sizeof(xfs_fsblock_t));
-
-	xfs_broot_realloc(ifp, new_size);
-	ASSERT(xfs_bmap_bmdr_space(ifp->if_broot) <=
-	       xfs_inode_fork_size(ip, whichfork));
-	return ifp->if_broot;
-}
-
-
-/*
  * This is called when the amount of space needed for if_data
  * is increased or decreased.  The change in size is indicated by
  * the number of bytes that need to be added or deleted in the