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ext2: code cleanup by calling ext2_group_last_block_no() 

Call common helper ext2_group_last_block_no() to
calculate group last block number.

Link: https://lore.kernel.org/r/20191104114036.9893-2-cgxu519@mykernel.net
Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Chengguang Xu 2019-11-04 19:40:33 +08:00 committed by Jan Kara
parent eb9e47fc23
commit 90f3741c2b
2 changed files with 9 additions and 15 deletions
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16
fs/ext2/balloc.c
View File

@ -269,7 +269,7 @@ goal_in_my_reservation(struct ext2_reserve_window *rsv, ext2_grpblk_t grp_goal,
ext2_fsblk_t group_first_block, group_last_block;
group_first_block = ext2_group_first_block_no(sb, group);
group_last_block = group_first_block + EXT2_BLOCKS_PER_GROUP(sb) - 1;
group_last_block = ext2_group_last_block_no(sb, group);
if ((rsv->_rsv_start > group_last_block) ||
(rsv->_rsv_end < group_first_block))
@ -666,22 +666,22 @@ ext2_try_to_allocate(struct super_block *sb, int group,
unsigned long *count,
struct ext2_reserve_window *my_rsv)
{
ext2_fsblk_t group_first_block;
ext2_fsblk_t group_first_block = ext2_group_first_block_no(sb, group);
ext2_fsblk_t group_last_block = ext2_group_last_block_no(sb, group);
ext2_grpblk_t start, end;
unsigned long num = 0;
/* we do allocation within the reservation window if we have a window */
if (my_rsv) {
group_first_block = ext2_group_first_block_no(sb, group);
if (my_rsv->_rsv_start >= group_first_block)
start = my_rsv->_rsv_start - group_first_block;
else
/* reservation window cross group boundary */
start = 0;
end = my_rsv->_rsv_end - group_first_block + 1;
if (end > EXT2_BLOCKS_PER_GROUP(sb))
if (end > group_last_block - group_first_block + 1)
/* reservation window crosses group boundary */
end = EXT2_BLOCKS_PER_GROUP(sb);
end = group_last_block - group_first_block + 1;
if ((start <= grp_goal) && (grp_goal < end))
start = grp_goal;
else
@ -691,7 +691,7 @@ ext2_try_to_allocate(struct super_block *sb, int group,
start = grp_goal;
else
start = 0;
end = EXT2_BLOCKS_PER_GROUP(sb);
end = group_last_block - group_first_block + 1;
}
BUG_ON(start > EXT2_BLOCKS_PER_GROUP(sb));
@ -907,7 +907,7 @@ static int alloc_new_reservation(struct ext2_reserve_window_node *my_rsv,
spinlock_t *rsv_lock = &EXT2_SB(sb)->s_rsv_window_lock;
group_first_block = ext2_group_first_block_no(sb, group);
group_end_block = group_first_block + (EXT2_BLOCKS_PER_GROUP(sb) - 1);
group_end_block = ext2_group_last_block_no(sb, group);
if (grp_goal < 0)
start_block = group_first_block;
@ -1114,7 +1114,7 @@ ext2_try_to_allocate_with_rsv(struct super_block *sb, unsigned int group,
* first block is the block number of the first block in this group
*/
group_first_block = ext2_group_first_block_no(sb, group);
group_last_block = group_first_block + (EXT2_BLOCKS_PER_GROUP(sb) - 1);
group_last_block = ext2_group_last_block_no(sb, group);
/*
* Basically we will allocate a new block from inode's reservation

8
fs/ext2/super.c
View File

@ -702,13 +702,7 @@ static int ext2_check_descriptors(struct super_block *sb)
for (i = 0; i < sbi->s_groups_count; i++) {
struct ext2_group_desc *gdp = ext2_get_group_desc(sb, i, NULL);
ext2_fsblk_t first_block = ext2_group_first_block_no(sb, i);
ext2_fsblk_t last_block;
if (i == sbi->s_groups_count - 1)
last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
else
last_block = first_block +
(EXT2_BLOCKS_PER_GROUP(sb) - 1);
ext2_fsblk_t last_block = ext2_group_last_block_no(sb, i);
if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
le32_to_cpu(gdp->bg_block_bitmap) > last_block)