On Tue, Oct 31, 2017 at 04:22:23PM +0200, Christoph Hellwig wrote:
> This actually makes the function very slightly less efficient for now as we
> detour through the expanded irect format between the in-core extent format
> and the on-disk one instead of just endian swapping them. But with the
> incore extent btree the in-core one will use a different format and the
> representation will be entirely hidden.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
> fs/xfs/libxfs/xfs_bmap.c | 20 ++++++++------------
> 1 file changed, 8 insertions(+), 12 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
> index 14428d72cf33..56482bf6280d 100644
> --- a/fs/xfs/libxfs/xfs_bmap.c
> +++ b/fs/xfs/libxfs/xfs_bmap.c
> @@ -666,14 +666,13 @@ xfs_bmap_extents_to_btree(
> xfs_bmbt_rec_t *arp; /* child record pointer */
> struct xfs_btree_block *block; /* btree root block */
> xfs_btree_cur_t *cur; /* bmap btree cursor */
> - xfs_bmbt_rec_host_t *ep; /* extent record pointer */
> int error; /* error return value */
> - xfs_extnum_t i, cnt; /* extent record index */
> xfs_ifork_t *ifp; /* inode fork pointer */
> xfs_bmbt_key_t *kp; /* root block key pointer */
> xfs_mount_t *mp; /* mount structure */
> - xfs_extnum_t nextents; /* number of file extents */
> xfs_bmbt_ptr_t *pp; /* root block address pointer */
> + struct xfs_bmbt_irec rec;
> + xfs_extnum_t i = 0, cnt = 0;
>
> mp = ip->i_mount;
> ASSERT(whichfork != XFS_COW_FORK);
> @@ -752,15 +751,12 @@ xfs_bmap_extents_to_btree(
> XFS_BTNUM_BMAP, 0, 0, ip->i_ino,
> XFS_BTREE_LONG_PTRS);
>
> - arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
> - nextents = xfs_iext_count(ifp);
> - for (cnt = i = 0; i < nextents; i++) {
> - ep = xfs_iext_get_ext(ifp, i);
> - if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) {
> - arp->l0 = cpu_to_be64(ep->l0);
> - arp->l1 = cpu_to_be64(ep->l1);
> - arp++; cnt++;
> - }
> + while (xfs_iext_get_extent(ifp, i++, &rec)) {
> + if (isnullstartblock(rec.br_startblock))
> + continue;
> + arp = XFS_BMBT_REC_ADDR(mp, ablock, 1 + cnt);
> + xfs_bmbt_disk_set_all(arp, &rec);
> + cnt++;
> }
> ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork));
> xfs_btree_set_numrecs(ablock, cnt);
> --
> 2.14.2
>
> --
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