ext4: cleanup to use ext4_group_first_block_no()
This is a cleanup and simplification patch which takes some open-coded
calculations to calculate the first block number of a group and
converts them to use the (already defined) ext4_group_first_block_no()
function.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger@sun.com>
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 720061a..fadbc4d 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -130,8 +130,7 @@
* to make sure we calculate the right free blocks
*/
group_blocks = ext4_blocks_count(sbi->s_es) -
- le32_to_cpu(sbi->s_es->s_first_data_block) -
- (EXT4_BLOCKS_PER_GROUP(sb) * (ngroups - 1));
+ ext4_group_first_block_no(sb, ngroups - 1);
} else {
group_blocks = EXT4_BLOCKS_PER_GROUP(sb);
}
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 4bb6920..3c0bae1 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -195,8 +195,7 @@
if (S_ISREG(inode->i_mode))
block_group++;
}
- bg_start = (block_group * EXT4_BLOCKS_PER_GROUP(inode->i_sb)) +
- le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_first_data_block);
+ bg_start = ext4_group_first_block_no(inode->i_sb, block_group);
last_block = ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es) - 1;
/*
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 72d5ceb..1156869 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -441,10 +441,9 @@
for (i = 0; i < count; i++) {
if (!mb_test_bit(first + i, e4b->bd_info->bb_bitmap)) {
ext4_fsblk_t blocknr;
- blocknr = e4b->bd_group * EXT4_BLOCKS_PER_GROUP(sb);
+
+ blocknr = ext4_group_first_block_no(sb, e4b->bd_group);
blocknr += first + i;
- blocknr +=
- le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
ext4_grp_locked_error(sb, e4b->bd_group,
__func__, "double-free of inode"
" %lu's block %llu(bit %u in group %u)",
@@ -1255,10 +1254,9 @@
if (!mb_test_bit(block, EXT4_MB_BITMAP(e4b))) {
ext4_fsblk_t blocknr;
- blocknr = e4b->bd_group * EXT4_BLOCKS_PER_GROUP(sb);
+
+ blocknr = ext4_group_first_block_no(sb, e4b->bd_group);
blocknr += block;
- blocknr +=
- le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
ext4_grp_locked_error(sb, e4b->bd_group,
__func__, "double-free of inode"
" %lu's block %llu(bit %u in group %u)",
@@ -1631,7 +1629,6 @@
int max;
int err;
struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
- struct ext4_super_block *es = sbi->s_es;
struct ext4_free_extent ex;
if (!(ac->ac_flags & EXT4_MB_HINT_TRY_GOAL))
@@ -1648,8 +1645,8 @@
if (max >= ac->ac_g_ex.fe_len && ac->ac_g_ex.fe_len == sbi->s_stripe) {
ext4_fsblk_t start;
- start = (e4b->bd_group * EXT4_BLOCKS_PER_GROUP(ac->ac_sb)) +
- ex.fe_start + le32_to_cpu(es->s_first_data_block);
+ start = ext4_group_first_block_no(ac->ac_sb, e4b->bd_group) +
+ ex.fe_start;
/* use do_div to get remainder (would be 64-bit modulo) */
if (do_div(start, sbi->s_stripe) == 0) {
ac->ac_found++;
@@ -1803,8 +1800,8 @@
BUG_ON(sbi->s_stripe == 0);
/* find first stripe-aligned block in group */
- first_group_block = e4b->bd_group * EXT4_BLOCKS_PER_GROUP(sb)
- + le32_to_cpu(sbi->s_es->s_first_data_block);
+ first_group_block = ext4_group_first_block_no(sb, e4b->bd_group);
+
a = first_group_block + sbi->s_stripe - 1;
do_div(a, sbi->s_stripe);
i = (a * sbi->s_stripe) - first_group_block;
@@ -2560,12 +2557,9 @@
ext4_unlock_group(sb, entry->group);
if (test_opt(sb, DISCARD)) {
ext4_fsblk_t discard_block;
- struct ext4_super_block *es = EXT4_SB(sb)->s_es;
- discard_block = (ext4_fsblk_t)entry->group *
- EXT4_BLOCKS_PER_GROUP(sb)
- + entry->start_blk
- + le32_to_cpu(es->s_first_data_block);
+ discard_block = entry->start_blk +
+ ext4_group_first_block_no(sb, entry->group);
trace_ext4_discard_blocks(sb,
(unsigned long long)discard_block,
entry->count);
@@ -3525,8 +3519,7 @@
if (bit >= end)
break;
next = mb_find_next_bit(bitmap_bh->b_data, end, bit);
- start = group * EXT4_BLOCKS_PER_GROUP(sb) + bit +
- le32_to_cpu(sbi->s_es->s_first_data_block);
+ start = ext4_group_first_block_no(sb, group) + bit;
mb_debug(1, " free preallocated %u/%u in group %u\n",
(unsigned) start, (unsigned) next - bit,
(unsigned) group);
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 436521c..9b2deed 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -225,11 +225,6 @@
static inline ext4_fsblk_t ext4_grp_offs_to_block(struct super_block *sb,
struct ext4_free_extent *fex)
{
- ext4_fsblk_t block;
-
- block = (ext4_fsblk_t) fex->fe_group * EXT4_BLOCKS_PER_GROUP(sb)
- + fex->fe_start
- + le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
- return block;
+ return ext4_group_first_block_no(sb, fex->fe_group) + fex->fe_start;
}
#endif