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ext4: split out ext4_free_blocks_after_init()

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The function ext4_free_blocks_after_init() used to be a #define of
ext4_init_block_bitmap().  This actually made it difficult to
understand how the function worked, and made it hard make changes to
support clusters.  So as an initial cleanup, I've separated out the
functionality of initializing block bitmap from calculating the number
of free blocks in the new block group.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2011-09-09 18:42:51 -04:00
parent 49f7f9af4b
commit fd034a84e1
3 changed files with 65 additions and 71 deletions
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20
fs/ext4/ialloc.c
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@@ -816,7 +816,6 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode,
int ret2, err = 0;
struct inode *ret;
ext4_group_t i;
int free = 0;
static int once = 1;
ext4_group_t flex_group;
@@ -950,26 +949,21 @@ got:
goto fail;
}
free = 0;
ext4_lock_group(sb, group);
BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap");
err = ext4_handle_dirty_metadata(handle, NULL, block_bitmap_bh);
brelse(block_bitmap_bh);
/* recheck and clear flag under lock if we still need to */
ext4_lock_group(sb, group);
if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
free = ext4_free_blocks_after_init(sb, group, gdp);
gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
ext4_free_blks_set(sb, gdp, free);
ext4_free_blks_set(sb, gdp,
ext4_free_blocks_after_init(sb, group, gdp));
gdp->bg_checksum = ext4_group_desc_csum(sbi, group,
gdp);
}
ext4_unlock_group(sb, group);
/* Don't need to dirty bitmap block if we didn't change it */
if (free) {
BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap");
err = ext4_handle_dirty_metadata(handle,
NULL, block_bitmap_bh);
}
brelse(block_bitmap_bh);
if (err)
goto fail;
}