From 960097622d48bf0ee8f6c0cf751a904066c4b45b Mon Sep 17 00:00:00 2001 From: Wang Sheng-Hui Date: Fri, 30 Nov 2012 06:30:14 +0000 Subject: Btrfs: use ctl->unit for free space calculation instead of block_group->sectorsize We should use ctl->unit for free space calculation instead of block_group->sectorsize even though for free space use_bitmap or free space cluster we only have sectorsize assigned to ctl->unit currently. Also, we can keep it consisten in code style. Signed-off-by: Wang Sheng-Hui Signed-off-by: Chris Mason --- fs/btrfs/free-space-cache.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-) (limited to 'fs/btrfs') diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index efdd1d3f441c..59ea2e4349c9 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -1353,7 +1353,7 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl) u64 bitmap_bytes; u64 extent_bytes; u64 size = block_group->key.offset; - u64 bytes_per_bg = BITS_PER_BITMAP * block_group->sectorsize; + u64 bytes_per_bg = BITS_PER_BITMAP * ctl->unit; int max_bitmaps = div64_u64(size + bytes_per_bg - 1, bytes_per_bg); BUG_ON(ctl->total_bitmaps > max_bitmaps); @@ -1639,8 +1639,7 @@ static bool use_bitmap(struct btrfs_free_space_ctl *ctl, * some block groups are so tiny they can't be enveloped by a bitmap, so * don't even bother to create a bitmap for this */ - if (BITS_PER_BITMAP * block_group->sectorsize > - block_group->key.offset) + if (BITS_PER_BITMAP * ctl->unit > block_group->key.offset) return false; return true; @@ -2287,10 +2286,10 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group, unsigned long total_found = 0; int ret; - i = offset_to_bit(entry->offset, block_group->sectorsize, + i = offset_to_bit(entry->offset, ctl->unit, max_t(u64, offset, entry->offset)); - want_bits = bytes_to_bits(bytes, block_group->sectorsize); - min_bits = bytes_to_bits(min_bytes, block_group->sectorsize); + want_bits = bytes_to_bits(bytes, ctl->unit); + min_bits = bytes_to_bits(min_bytes, ctl->unit); again: found_bits = 0; @@ -2314,23 +2313,22 @@ again: total_found += found_bits; - if (cluster->max_size < found_bits * block_group->sectorsize) - cluster->max_size = found_bits * block_group->sectorsize; + if (cluster->max_size < found_bits * ctl->unit) + cluster->max_size = found_bits * ctl->unit; if (total_found < want_bits || cluster->max_size < cont1_bytes) { i = next_zero + 1; goto again; } - cluster->window_start = start * block_group->sectorsize + - entry->offset; + cluster->window_start = start * ctl->unit + entry->offset; rb_erase(&entry->offset_index, &ctl->free_space_offset); ret = tree_insert_offset(&cluster->root, entry->offset, &entry->offset_index, 1); BUG_ON(ret); /* -EEXIST; Logic error */ trace_btrfs_setup_cluster(block_group, cluster, - total_found * block_group->sectorsize, 1); + total_found * ctl->unit, 1); return 0; } -- cgit v1.2.3