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xfs: rewrite xfs_bmap_count_leaves using xfs_iext_get_extent 

This avoids poking into the internals of the extent list.  Also return
the number of extents as the return value instead of an additional
by reference argument, and make it available to callers outside of
xfs_bmap_util.c

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>
This commit is contained in:
Christoph Hellwig 2017-08-29 15:44:14 -07:00 committed by Darrick J. Wong
parent 4c35445b59
commit e17a5c6f0e
2 changed files with 10 additions and 10 deletions
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19
fs/xfs/xfs_bmap_util.c
View File

@ -222,22 +222,21 @@ xfs_bmap_eof(
* Count leaf blocks given a range of extent records. Delayed allocation
* extents are not counted towards the totals.
*/
STATIC void
xfs_extnum_t
xfs_bmap_count_leaves(
struct xfs_ifork *ifp,
xfs_extnum_t *numrecs,
xfs_filblks_t *count)
{
xfs_extnum_t i;
xfs_extnum_t nr_exts = xfs_iext_count(ifp);
struct xfs_bmbt_irec got;
xfs_extnum_t numrecs = 0, i = 0;
for (i = 0; i < nr_exts; i++) {
xfs_bmbt_rec_host_t *frp = xfs_iext_get_ext(ifp, i);
if (!isnullstartblock(xfs_bmbt_get_startblock(frp))) {
(*numrecs)++;
*count += xfs_bmbt_get_blockcount(frp);
while (xfs_iext_get_extent(ifp, i++, &got)) {
if (!isnullstartblock(got.br_startblock)) {
*count += got.br_blockcount;
numrecs++;
}
}
return numrecs;
}
/*
@ -370,7 +369,7 @@ xfs_bmap_count_blocks(
switch (XFS_IFORK_FORMAT(ip, whichfork)) {
case XFS_DINODE_FMT_EXTENTS:
xfs_bmap_count_leaves(ifp, nextents, count);
*nextents = xfs_bmap_count_leaves(ifp, count);
return 0;
case XFS_DINODE_FMT_BTREE:
if (!(ifp->if_flags & XFS_IFEXTENTS)) {

1
fs/xfs/xfs_bmap_util.h
View File

@ -70,6 +70,7 @@ int xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
xfs_extnum_t xfs_bmap_count_leaves(struct xfs_ifork *ifp, xfs_filblks_t *count);
int xfs_bmap_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
int whichfork, xfs_extnum_t *nextents,
xfs_filblks_t *count);