From: Christoph Hellwig Date: Fri, 3 Nov 2017 17:34:43 +0000 (-0700) Subject: xfs: iterate over extents in xfs_bmap_extents_to_btree X-Git-Tag: v4.15-rc1~136^2~33 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=906abed501bf5a2103946deb7a4a40b31c56f027;p=linux.git xfs: iterate over extents in xfs_bmap_extents_to_btree 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 Reviewed-by: Brian Foster Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 8ce7bf19916f..f4d0639dc4ae 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -667,14 +667,13 @@ 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); @@ -753,15 +752,12 @@ 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);