ping?
On Tue, Aug 30, 2011 at 4:10 PM, Yongqiang Yang <xiaoqiangnk@xxxxxxxxx> wrote:
> This patch added a function named __ext4_group_extend() whose code
> is copied from ext4_group_extend(). __ext4_group_extend() assumes
> the parameter is valid and has been checked by caller.
>
> __ext4_group_extend() will be used by new resize implementation. It
> can also be used by ext4_group_extend(), but this patch series does
> not do this.
>
> Signed-off-by: Yongqiang Yang <xiaoqiangnk@xxxxxxxxx>
> ---
> fs/ext4/resize.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 53 insertions(+), 0 deletions(-)
>
> diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
> index 707d3f1..5126aac 100644
> --- a/fs/ext4/resize.c
> +++ b/fs/ext4/resize.c
> @@ -969,6 +969,59 @@ exit_put:
> } /* ext4_group_add */
>
> /*
> + * extend a group without checking assuming that checking has been done.
> + */
> +static int __ext4_group_extend(struct super_block *sb,
> + ext4_fsblk_t o_blocks_count, ext4_grpblk_t add)
> +{
> + struct ext4_super_block *es = EXT4_SB(sb)->s_es;
> + handle_t *handle;
> + int err = 0, err2;
> +
> + /* We will update the superblock, one block bitmap, and
> + * one group descriptor via ext4_group_add_blocks().
> + */
> + handle = ext4_journal_start_sb(sb, 3);
> + if (IS_ERR(handle)) {
> + err = PTR_ERR(handle);
> + ext4_warning(sb, "error %d on journal start", err);
> + goto out;
> + }
> +
> + err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
> + if (err) {
> + ext4_warning(sb, "error %d on journal write access", err);
> + ext4_journal_stop(handle);
> + goto out;
> + }
> +
> + ext4_blocks_count_set(es, o_blocks_count + add);
> + ext4_debug("freeing blocks %llu through %llu\n", o_blocks_count,
> + o_blocks_count + add);
> + /* We add the blocks to the bitmap and set the group need init bit */
> + err = ext4_group_add_blocks(handle, sb, o_blocks_count, add);
> + if (err)
> + goto exit_journal;
> + ext4_handle_dirty_super(handle, sb);
> + ext4_debug("freed blocks %llu through %llu\n", o_blocks_count,
> + o_blocks_count + add);
> +exit_journal:
> + err2 = ext4_journal_stop(handle);
> + if (err2 && !err)
> + err = err2;
> +
> + if (!err) {
> + if (test_opt(sb, DEBUG))
> + printk(KERN_DEBUG "EXT4-fs: extended group to %llu "
> + "blocks\n", ext4_blocks_count(es));
> + update_backups(sb, EXT4_SB(sb)->s_sbh->b_blocknr, (char *)es,
> + sizeof(struct ext4_super_block));
> + }
> +out:
> + return err;
> +}
> +
> +/*
> * Extend the filesystem to the new number of blocks specified. This entry
> * point is only used to extend the current filesystem to the end of the last
> * existing group. It can be accessed via ioctl, or by "remount,resize=<size>"
> --
> 1.7.5.1
>
>
--
Best Wishes
Yongqiang Yang
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