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Date: Tue, 9 Apr 2013 19:03:55 +0800
From: Zheng Liu <gnehzuil.liu@...il.com>
To: Lukas Czerner <lczerner@...hat.com>
Cc: linux-ext4@...r.kernel.org
Subject: Re: [PATCH v3] ext4: move ext4_ind_migrate() into migrate.c
On Tue, Apr 09, 2013 at 12:10:56PM +0200, Lukas Czerner wrote:
> Move ext4_ind_migrate() into migrate.c file since it makes much more
> sense and ext4_ext_migrate() is there as well.
>
> Signed-off-by: Lukas Czerner <lczerner@...hat.com>
The patch looks good to me. But it seems that you forgot to add
bigalloc check. IIRC, that patch hasn't be applied.
Regards,
- Zheng
> ---
> fs/ext4/ext4.h | 2 +-
> fs/ext4/extents.c | 59 ----------------------------------------------------
> fs/ext4/migrate.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
> 3 files changed, 60 insertions(+), 61 deletions(-)
>
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index a0637e5..bb56920 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -2131,6 +2131,7 @@ extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long);
>
> /* migrate.c */
> extern int ext4_ext_migrate(struct inode *);
> +extern int ext4_ind_migrate(struct inode *inode);
>
> /* namei.c */
> extern int ext4_dirent_csum_verify(struct inode *inode,
> @@ -2620,7 +2621,6 @@ extern int ext4_find_delalloc_range(struct inode *inode,
> extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk);
> extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
> __u64 start, __u64 len);
> -extern int ext4_ind_migrate(struct inode *inode);
>
>
> /* move_extent.c */
> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
> index 6c5a70a..3645357 100644
> --- a/fs/ext4/extents.c
> +++ b/fs/ext4/extents.c
> @@ -4715,62 +4715,3 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
>
> return error;
> }
> -
> -/*
> - * Migrate a simple extent-based inode to use the i_blocks[] array
> - */
> -int ext4_ind_migrate(struct inode *inode)
> -{
> - struct ext4_extent_header *eh;
> - struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
> - struct ext4_inode_info *ei = EXT4_I(inode);
> - struct ext4_extent *ex;
> - unsigned int i, len;
> - ext4_fsblk_t blk;
> - handle_t *handle;
> - int ret;
> -
> - if (!EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
> - EXT4_FEATURE_INCOMPAT_EXTENTS) ||
> - (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
> - return -EINVAL;
> -
> - down_write(&EXT4_I(inode)->i_data_sem);
> - ret = ext4_ext_check_inode(inode);
> - if (ret)
> - goto errout;
> -
> - eh = ext_inode_hdr(inode);
> - ex = EXT_FIRST_EXTENT(eh);
> - if (ext4_blocks_count(es) > EXT4_MAX_BLOCK_FILE_PHYS ||
> - eh->eh_depth != 0 || eh->eh_entries > 1) {
> - ret = -EOPNOTSUPP;
> - goto errout;
> - }
> - if (eh->eh_entries == 0)
> - blk = len = 0;
> - else {
> - len = le16_to_cpu(ex->ee_len);
> - blk = ext4_ext_pblock(ex);
> - if (len > EXT4_NDIR_BLOCKS) {
> - ret = -EOPNOTSUPP;
> - goto errout;
> - }
> - }
> -
> - handle = ext4_journal_start(inode, EXT4_HT_MIGRATE, 1);
> - if (IS_ERR(handle)) {
> - ret = PTR_ERR(handle);
> - goto errout;
> - }
> -
> - ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
> - memset(ei->i_data, 0, sizeof(ei->i_data));
> - for (i=0; i < len; i++)
> - ei->i_data[i] = cpu_to_le32(blk++);
> - ext4_mark_inode_dirty(handle, inode);
> - ext4_journal_stop(handle);
> -errout:
> - up_write(&EXT4_I(inode)->i_data_sem);
> - return ret;
> -}
> diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
> index 480acf4..3464604 100644
> --- a/fs/ext4/migrate.c
> +++ b/fs/ext4/migrate.c
> @@ -426,7 +426,6 @@ static int free_ext_block(handle_t *handle, struct inode *inode)
> return retval;
> }
> return retval;
> -
> }
>
> int ext4_ext_migrate(struct inode *inode)
> @@ -606,3 +605,62 @@ out:
>
> return retval;
> }
> +
> +/*
> + * Migrate a simple extent-based inode to use the i_blocks[] array
> + */
> +int ext4_ind_migrate(struct inode *inode)
> +{
> + struct ext4_extent_header *eh;
> + struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
> + struct ext4_inode_info *ei = EXT4_I(inode);
> + struct ext4_extent *ex;
> + unsigned int i, len;
> + ext4_fsblk_t blk;
> + handle_t *handle;
> + int ret;
> +
> + if (!EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
> + EXT4_FEATURE_INCOMPAT_EXTENTS) ||
> + (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
> + return -EINVAL;
> +
> + down_write(&EXT4_I(inode)->i_data_sem);
> + ret = ext4_ext_check_inode(inode);
> + if (ret)
> + goto errout;
> +
> + eh = ext_inode_hdr(inode);
> + ex = EXT_FIRST_EXTENT(eh);
> + if (ext4_blocks_count(es) > EXT4_MAX_BLOCK_FILE_PHYS ||
> + eh->eh_depth != 0 || eh->eh_entries > 1) {
> + ret = -EOPNOTSUPP;
> + goto errout;
> + }
> + if (eh->eh_entries == 0)
> + blk = len = 0;
> + else {
> + len = le16_to_cpu(ex->ee_len);
> + blk = ext4_ext_pblock(ex);
> + if (len > EXT4_NDIR_BLOCKS) {
> + ret = -EOPNOTSUPP;
> + goto errout;
> + }
> + }
> +
> + handle = ext4_journal_start(inode, EXT4_HT_MIGRATE, 1);
> + if (IS_ERR(handle)) {
> + ret = PTR_ERR(handle);
> + goto errout;
> + }
> +
> + ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
> + memset(ei->i_data, 0, sizeof(ei->i_data));
> + for (i = 0; i < len; i++)
> + ei->i_data[i] = cpu_to_le32(blk++);
> + ext4_mark_inode_dirty(handle, inode);
> + ext4_journal_stop(handle);
> +errout:
> + up_write(&EXT4_I(inode)->i_data_sem);
> + return ret;
> +}
> --
> 1.7.7.6
>
--
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