[Ocfs2-devel] [PATCH] ocfs2: should not use le32_add_cpu to set ocfs2_dinode i_flags

[Jeff Liu]

Thanks for your patch, Joseph.

On 05/29/2013 10:42 AM, Joseph Qi wrote:

> If we use le32_add_cpu to set ocfs2_dinode i_flags, it may lead to the
> corresponding flag corrupted. So we should change it to bitwise and/or
> operation.
> 
> Signed-off-by: Joseph Qi <joseph.qi at huawei.com>
> ---
>  fs/ocfs2/namei.c |    6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
> index 04ee1b5..3a5269a 100644
> --- a/fs/ocfs2/namei.c
> +++ b/fs/ocfs2/namei.c
> @@ -522,7 +522,7 @@ static int __ocfs2_mknod_locked(struct inode *dir,
> 
>  	fe->i_last_eb_blk = 0;
>  	strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
> -	le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
> +	fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
>  	fe->i_atime = fe->i_ctime = fe->i_mtime =
>  		cpu_to_le64(CURRENT_TIME.tv_sec);
>  	fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
> @@ -2044,7 +2044,7 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb,
>  		goto leave;
>  	}
> 
> -	le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
> +	fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
>  	OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
> 
>  	/* Record which orphan dir our inode now resides
> @@ -2434,7 +2434,7 @@ int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
>  	}
> 
>  	di = (struct ocfs2_dinode *)di_bh->b_data;
> -	le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
> +	di->i_flags &= cpu_to_le32(~OCFS2_ORPHANED_FL);

Hmm? This is wrong.  Instead it should be:
di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);

>  	di->i_orphaned_slot = 0;
>  	set_nlink(inode, 1);
>  	ocfs2_set_links_count(di, inode->i_nlink);


-Jeff