[Cluster-devel] [GFS2 PATCH] gfs2: Automatically set GFS2_DIF_SYSTEM flag on system files

[Andrew Price <anprice@redhat.com>]

Hi Abhi,

On 30/10/15 19:57, Abhi Das wrote:
> When new files and directories are created inside a parent directory
> we automatically inherit the GFS2_DIF_SYSTEM flag (if set) and assign
> it to the new file/dirs.
>
> All new system files/dirs created in the metafs by, say gfs2_jadd,
> will have this flag set because they will have parent directories in
> the metafs whose GFS2_DIF_SYSTEM flag has already been set (most likely
> by a previous mkfs.gfs2)
>
> Resolves: rhbz#1272086
> Signed-off-by: Abhi Das <adas@redhat.com>
> ---
>   fs/gfs2/file.c  | 4 ++--
>   fs/gfs2/inode.c | 5 +++++
>   2 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
> index 71cd138..63fe948 100644
> --- a/fs/gfs2/file.c
> +++ b/fs/gfs2/file.c
> @@ -298,9 +298,9 @@ static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
>   		gfsflags &= ~GFS2_DIF_TOPDIR;
>   		if (gfsflags & GFS2_DIF_INHERIT_JDATA)
>   			gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA);
> -		return do_gfs2_set_flags(filp, gfsflags, ~0);
> +		return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_SYSTEM);
>   	}
> -	return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_JDATA);
> +	return do_gfs2_set_flags(filp, gfsflags, ~(GFS2_DIF_SYSTEM | GFS2_DIF_JDATA));

Are these two changes still required? The function only seems to get 
called in the SETFLAGS ioctl path.

Cheers,
Andy

>   }
>
>   static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
> index 063fdfc..2c05bc3 100644
> --- a/fs/gfs2/inode.c
> +++ b/fs/gfs2/inode.c
> @@ -685,6 +685,11 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
>   		ip->i_entries = 2;
>   		break;
>   	}
> +
> +	/* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
> +	if (dip->i_diskflags & GFS2_DIF_SYSTEM)
> +		ip->i_diskflags |= GFS2_DIF_SYSTEM;
> +
>   	gfs2_set_inode_flags(inode);
>
>   	if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
>