On 2011-08-11, at 3:15 PM, Darrick J. Wong wrote:
> ext4_dx_add_entry manipulates bh2 and frames[0].bh, which are two buffer_heads
> that point to directory blocks assigned to the directory inode. However, the
> function calls ext4_handle_dirty_metadata with the inode of the file that's
> being added to the directory, not the directory inode itself. Therefore,
> correct the code to dirty the directory buffers with the directory inode, not
> the file inode.
Interesting. For journaled filesystems this is purely cosmetic, since
"handle" is valid and "inode" is unused in that case. For non-journal
filesystems it actually affects the correctness, since this buffer may
not be sync'd to disk even when the directory is marked "dirsync".
You can add my:
Reviewed-by: Andreas Dilger <adilger@xxxxxxxxx>
> Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> ---
>
> fs/ext4/namei.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
> index b754b77..79ddc43 100644
> --- a/fs/ext4/namei.c
> +++ b/fs/ext4/namei.c
> @@ -1589,7 +1589,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
> dxtrace(dx_show_index("node", frames[1].entries));
> dxtrace(dx_show_index("node",
> ((struct dx_node *) bh2->b_data)->entries));
> - err = ext4_handle_dirty_metadata(handle, inode, bh2);
> + err = ext4_handle_dirty_metadata(handle, dir, bh2);
> if (err)
> goto journal_error;
> brelse (bh2);
> @@ -1615,7 +1615,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry,
> if (err)
> goto journal_error;
> }
> - err = ext4_handle_dirty_metadata(handle, inode, frames[0].bh);
> + err = ext4_handle_dirty_metadata(handle, dir, frames[0].bh);
> if (err) {
> ext4_std_error(inode->i_sb, err);
> goto cleanup;
> --
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Cheers, Andreas
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