diff options
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_aops.c | 49 |
1 files changed, 25 insertions, 24 deletions
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c index 58fc7ade90b..4b6bfdb8251 100644 --- a/fs/xfs/linux-2.6/xfs_aops.c +++ b/fs/xfs/linux-2.6/xfs_aops.c @@ -487,28 +487,37 @@ xfs_add_to_ioend( } STATIC void +xfs_map_buffer( + struct buffer_head *bh, + xfs_iomap_t *mp, + xfs_off_t offset, + uint block_bits) +{ + sector_t bn; + + ASSERT(mp->iomap_bn != IOMAP_DADDR_NULL); + + bn = (mp->iomap_bn >> (block_bits - BBSHIFT)) + + ((offset - mp->iomap_offset) >> block_bits); + + ASSERT(bn || (mp->iomap_flags & IOMAP_REALTIME)); + + bh->b_blocknr = bn; + set_buffer_mapped(bh); +} + +STATIC void xfs_map_at_offset( struct buffer_head *bh, loff_t offset, int block_bits, xfs_iomap_t *iomapp) { - xfs_daddr_t bn; - int sector_shift; - ASSERT(!(iomapp->iomap_flags & IOMAP_HOLE)); ASSERT(!(iomapp->iomap_flags & IOMAP_DELAY)); - ASSERT(iomapp->iomap_bn != IOMAP_DADDR_NULL); - - sector_shift = block_bits - BBSHIFT; - bn = (iomapp->iomap_bn >> sector_shift) + - ((offset - iomapp->iomap_offset) >> block_bits); - - ASSERT(bn || (iomapp->iomap_flags & IOMAP_REALTIME)); - ASSERT((bn << sector_shift) >= iomapp->iomap_bn); lock_buffer(bh); - bh->b_blocknr = bn; + xfs_map_buffer(bh, iomapp, offset, block_bits); bh->b_bdev = iomapp->iomap_target->bt_bdev; set_buffer_mapped(bh); clear_buffer_delay(bh); @@ -1246,21 +1255,13 @@ __linvfs_get_block( return 0; if (iomap.iomap_bn != IOMAP_DADDR_NULL) { - xfs_daddr_t bn; - xfs_off_t delta; - - /* For unwritten extents do not report a disk address on + /* + * For unwritten extents do not report a disk address on * the read case (treat as if we're reading into a hole). */ if (create || !(iomap.iomap_flags & IOMAP_UNWRITTEN)) { - delta = offset - iomap.iomap_offset; - delta >>= inode->i_blkbits; - - bn = iomap.iomap_bn >> (inode->i_blkbits - BBSHIFT); - bn += delta; - BUG_ON(!bn && !(iomap.iomap_flags & IOMAP_REALTIME)); - bh_result->b_blocknr = bn; - set_buffer_mapped(bh_result); + xfs_map_buffer(bh_result, &iomap, offset, + inode->i_blkbits); } if (create && (iomap.iomap_flags & IOMAP_UNWRITTEN)) { if (direct) |