On Nov 4, 2018, at 9:41 AM, Vasily Averin <vvs@xxxxxxxxxxxxx> wrote:
>
> update_ind/bind/tind_extent_page() differs by one variable and can be
> replaced by unified function. These functions are called by similar way
> and their caller function can be simplified too.
The patch looks quite reasonable, though I'd suggest a couple of very
minor style changes (inline). You can add to the resubmitted patch:
Reviewed-by: Andreas Dilger <adilger@xxxxxxxxx>
> Signed-off-by: Vasily Averin <vvs@xxxxxxxxxxxxx>
> ---
> fs/ext4/migrate.c | 111 ++++++++++------------------------------------
> 1 file changed, 23 insertions(+), 88 deletions(-)
>
> diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
> index 61a9d1927817..02ce99ba32be 100644
> --- a/fs/ext4/migrate.c
> +++ b/fs/ext4/migrate.c
> @@ -109,12 +109,13 @@ static int update_extent_range(handle_t *handle, struct inode *inode,
>
> static int update_ind_extent_range(handle_t *handle, struct inode *inode,
> ext4_fsblk_t pblock,
> - struct migrate_struct *lb)
> + struct migrate_struct *lb,
> + ext4_lblk_t inc)
> {
> struct buffer_head *bh;
> __le32 *i_data;
> int i, retval = 0;
> - unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
> + ext4_lblk_t max_entries = inode->i_sb->s_blocksize >> 2;
>
> bh = sb_bread(inode->i_sb, pblock);
> if (!bh)
> @@ -523,34 +464,28 @@ int ext4_ext_migrate(struct inode *inode)
>
> /* 32 bit block address 4 bytes */
> max_entries = inode->i_sb->s_blocksize >> 2;
> - for (i = 0; i < EXT4_NDIR_BLOCKS; i++) {
> +
> + inc = 1; mult = 1;
> + for (i = 0; i < EXT4_N_BLOCKS; i++) {
> + if (i == EXT4_IND_BLOCK)
> + mult = max_entries;
> + else if (i > EXT4_IND_BLOCK)
> + inc = inc * mult;
This should be "inc *= mult".
> if (i_data[i]) {
> + if (i < EXT4_IND_BLOCK)
> + retval = update_extent_range(handle, tmp_inode,
> le32_to_cpu(i_data[i]), &lb);
> + else
> + retval = update_ind_extent_range(handle,
> + tmp_inode,
> + le32_to_cpu(i_data[i]),
> + &lb, inc);
> if (retval)
> goto err_out;
> +
> + } else if (i < EXT4_TIND_BLOCK)
> + lb.curr_block += inc * mult;
There should be {} around the else-block to match the if-block.
Cheers, Andreas
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