ext4: convert number of blocks to clusters properly

commit 810da240f221d64bf90020f25941b05b378186fe upstream.

We're using macro EXT4_B2C() to convert number of blocks to number of
clusters for bigalloc file systems.  However, we should be using
EXT4_NUM_B2C().

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
[bwh: Backported to 3.2:
 - Adjust context
 - Drop changes in ext4_setup_new_descs() and ext4_calculate_overhead()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 484ffee..2845a1f 100644 (file)
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -571,7 +571,7 @@ ext4_fsblk_t ext4_count_free_clusters(struct super_block *sb)
        brelse(bitmap_bh);
        printk(KERN_DEBUG "ext4_count_free_clusters: stored = %llu"
               ", computed = %llu, %llu\n",
-              EXT4_B2C(EXT4_SB(sb), ext4_free_blocks_count(es)),
+              EXT4_NUM_B2C(EXT4_SB(sb), ext4_free_blocks_count(es)),
               desc_count, bitmap_count);
        return bitmap_count;
 #else

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 553ff71..59a3607 100644 (file)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3485,7 +3485,7 @@ ext4_mb_new_inode_pa(struct ext4_allocation_context *ac)
                        win = offs;
 
                ac->ac_b_ex.fe_logical = ac->ac_o_ex.fe_logical -
-                       EXT4_B2C(sbi, win);
+                       EXT4_NUM_B2C(sbi, win);
                BUG_ON(ac->ac_o_ex.fe_logical < ac->ac_b_ex.fe_logical);
                BUG_ON(ac->ac_o_ex.fe_len > ac->ac_b_ex.fe_len);
        }
@@ -4634,7 +4634,7 @@ do_more:
                        EXT4_BLOCKS_PER_GROUP(sb);
                count -= overflow;
        }
-       count_clusters = EXT4_B2C(sbi, count);
+       count_clusters = EXT4_NUM_B2C(sbi, count);
        bitmap_bh = ext4_read_block_bitmap(sb, block_group);
        if (!bitmap_bh) {
                err = -EIO;
@@ -4865,11 +4865,11 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
        desc->bg_checksum = ext4_group_desc_csum(sbi, block_group, desc);
        ext4_unlock_group(sb, block_group);
        percpu_counter_add(&sbi->s_freeclusters_counter,
-                          EXT4_B2C(sbi, blocks_freed));
+                          EXT4_NUM_B2C(sbi, blocks_freed));
 
        if (sbi->s_log_groups_per_flex) {
                ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
-               atomic_add(EXT4_B2C(sbi, blocks_freed),
+               atomic_add(EXT4_NUM_B2C(sbi, blocks_freed),
                           &sbi->s_flex_groups[flex_group].free_clusters);
        }
 

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 33129c0..b76926f 100644 (file)
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -938,7 +938,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
 
        /* Update the free space counts */
        percpu_counter_add(&sbi->s_freeclusters_counter,
-                          EXT4_B2C(sbi, input->free_blocks_count));
+                          EXT4_NUM_B2C(sbi, input->free_blocks_count));
        percpu_counter_add(&sbi->s_freeinodes_counter,
                           EXT4_INODES_PER_GROUP(sb));
 
@@ -946,7 +946,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input)
            sbi->s_log_groups_per_flex) {
                ext4_group_t flex_group;
                flex_group = ext4_flex_group(sbi, input->group);
-               atomic_add(EXT4_B2C(sbi, input->free_blocks_count),
+               atomic_add(EXT4_NUM_B2C(sbi, input->free_blocks_count),
                           &sbi->s_flex_groups[flex_group].free_clusters);
                atomic_add(EXT4_INODES_PER_GROUP(sb),
                           &sbi->s_flex_groups[flex_group].free_inodes);