| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 11 Jan 2008 00:26:32 +0100
From: Jan Kara <jack@...e.cz>
To: marcin.slusarz@...il.com
Cc: LKML <linux-kernel@...r.kernel.org>, Jan Kara <jack@...e.cz>,
Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 11/16] udf: replace loops coded with goto to real loops
On Thu 10-01-08 23:06:27, marcin.slusarz@...il.com wrote:
> Signed-off-by: Marcin Slusarz <marcin.slusarz@...il.com>
> CC: Jan Kara <jack@...e.cz>
> CC: Christoph Hellwig <hch@...radead.org>
Acked-by: Jan Kara <jack@...e.cz>
> ---
> fs/udf/balloc.c | 118 +++++++++++++++++++++++++++---------------------------
> 1 files changed, 59 insertions(+), 59 deletions(-)
>
> diff --git a/fs/udf/balloc.c b/fs/udf/balloc.c
> index 78dbf1d..df55d9f 100644
> --- a/fs/udf/balloc.c
> +++ b/fs/udf/balloc.c
> @@ -183,46 +183,46 @@ static void udf_bitmap_free_blocks(struct super_block *sb,
> block = bloc.logicalBlockNum + offset +
> (sizeof(struct spaceBitmapDesc) << 3);
>
> -do_more:
> - overflow = 0;
> - block_group = block >> (sb->s_blocksize_bits + 3);
> - bit = block % (sb->s_blocksize << 3);
> + do {
> + overflow = 0;
> + block_group = block >> (sb->s_blocksize_bits + 3);
> + bit = block % (sb->s_blocksize << 3);
>
> - /*
> - * Check to see if we are freeing blocks across a group boundary.
> - */
> - if (bit + count > (sb->s_blocksize << 3)) {
> - overflow = bit + count - (sb->s_blocksize << 3);
> - count -= overflow;
> - }
> - bitmap_nr = load_block_bitmap(sb, bitmap, block_group);
> - if (bitmap_nr < 0)
> - goto error_return;
> + /*
> + * Check to see if we are freeing blocks across a group boundary.
> + */
> + if (bit + count > (sb->s_blocksize << 3)) {
> + overflow = bit + count - (sb->s_blocksize << 3);
> + count -= overflow;
> + }
> + bitmap_nr = load_block_bitmap(sb, bitmap, block_group);
> + if (bitmap_nr < 0)
> + goto error_return;
>
> - bh = bitmap->s_block_bitmap[bitmap_nr];
> - for (i = 0; i < count; i++) {
> - if (udf_set_bit(bit + i, bh->b_data)) {
> - udf_debug("bit %ld already set\n", bit + i);
> - udf_debug("byte=%2x\n",
> - ((char *)bh->b_data)[(bit + i) >> 3]);
> - } else {
> - if (inode)
> - DQUOT_FREE_BLOCK(inode, 1);
> - udf_inc_free_space(sbi, sbi->s_partition, 1);
> + bh = bitmap->s_block_bitmap[bitmap_nr];
> + for (i = 0; i < count; i++) {
> + if (udf_set_bit(bit + i, bh->b_data)) {
> + udf_debug("bit %ld already set\n", bit + i);
> + udf_debug("byte=%2x\n",
> + ((char *)bh->b_data)[(bit + i) >> 3]);
> + } else {
> + if (inode)
> + DQUOT_FREE_BLOCK(inode, 1);
> + udf_inc_free_space(sbi, sbi->s_partition, 1);
> + }
> }
> - }
> - mark_buffer_dirty(bh);
> - if (overflow) {
> - block += count;
> - count = overflow;
> - goto do_more;
> - }
> + mark_buffer_dirty(bh);
> + if (overflow) {
> + block += count;
> + count = overflow;
> + }
> + } while (overflow);
> +
> error_return:
> sb->s_dirt = 1;
> if (sbi->s_lvid_bh)
> mark_buffer_dirty(sbi->s_lvid_bh);
> mutex_unlock(&sbi->s_alloc_mutex);
> - return;
> }
>
> static int udf_bitmap_prealloc_blocks(struct super_block *sb,
> @@ -246,37 +246,37 @@ static int udf_bitmap_prealloc_blocks(struct super_block *sb,
> if (first_block + block_count > part_len)
> block_count = part_len - first_block;
>
> -repeat:
> - nr_groups = udf_compute_nr_groups(sb, partition);
> - block = first_block + (sizeof(struct spaceBitmapDesc) << 3);
> - block_group = block >> (sb->s_blocksize_bits + 3);
> - group_start = block_group ? 0 : sizeof(struct spaceBitmapDesc);
> + do {
> + nr_groups = udf_compute_nr_groups(sb, partition);
> + block = first_block + (sizeof(struct spaceBitmapDesc) << 3);
> + block_group = block >> (sb->s_blocksize_bits + 3);
> + group_start = block_group ? 0 : sizeof(struct spaceBitmapDesc);
>
> - bitmap_nr = load_block_bitmap(sb, bitmap, block_group);
> - if (bitmap_nr < 0)
> - goto out;
> - bh = bitmap->s_block_bitmap[bitmap_nr];
> + bitmap_nr = load_block_bitmap(sb, bitmap, block_group);
> + if (bitmap_nr < 0)
> + goto out;
> + bh = bitmap->s_block_bitmap[bitmap_nr];
>
> - bit = block % (sb->s_blocksize << 3);
> + bit = block % (sb->s_blocksize << 3);
>
> - while (bit < (sb->s_blocksize << 3) && block_count > 0) {
> - if (!udf_test_bit(bit, bh->b_data)) {
> - goto out;
> - } else if (DQUOT_PREALLOC_BLOCK(inode, 1)) {
> - goto out;
> - } else if (!udf_clear_bit(bit, bh->b_data)) {
> - udf_debug("bit already cleared for block %d\n", bit);
> - DQUOT_FREE_BLOCK(inode, 1);
> - goto out;
> + while (bit < (sb->s_blocksize << 3) && block_count > 0) {
> + if (!udf_test_bit(bit, bh->b_data))
> + goto out;
> + else if (DQUOT_PREALLOC_BLOCK(inode, 1))
> + goto out;
> + else if (!udf_clear_bit(bit, bh->b_data)) {
> + udf_debug("bit already cleared for block %d\n", bit);
> + DQUOT_FREE_BLOCK(inode, 1);
> + goto out;
> + }
> + block_count--;
> + alloc_count++;
> + bit++;
> + block++;
> }
> - block_count--;
> - alloc_count++;
> - bit++;
> - block++;
> - }
> - mark_buffer_dirty(bh);
> - if (block_count > 0)
> - goto repeat;
> + mark_buffer_dirty(bh);
> + } while (block_count > 0);
> +
> out:
> if (udf_inc_free_space(sbi, partition, -alloc_count))
> mark_buffer_dirty(sbi->s_lvid_bh);
> --
> 1.5.3.7
>
Honza
--
Jan Kara <jack@...e.cz>
SUSE Labs, CR
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists