Please disregard v2 - It messed up the email addresses for Serge and Eric. v3
with the correct email addresses is already sent out.
On Mon, Oct 16, 2017 at 05:30:53PM +0200, Christian Brauner wrote:
> This is preparation for bumping the {g,u}idmap limits for usernamespaces.
>
> Signed-off-by: Christian Brauner <[email protected]>
> ---
> include/linux/user_namespace.h | 18 +++++++++++++-----
> 1 file changed, 13 insertions(+), 5 deletions(-)
>
> diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
> index c18e01252346..7c83d7f6289b 100644
> --- a/include/linux/user_namespace.h
> +++ b/include/linux/user_namespace.h
> @@ -12,13 +12,21 @@
>
> #define UID_GID_MAP_MAX_EXTENTS 5
>
> +struct uid_gid_extent {
> + u32 first;
> + u32 lower_first;
> + u32 count;
> +};
> +
> struct uid_gid_map { /* 64 bytes -- 1 cache line */
> u32 nr_extents;
> - struct uid_gid_extent {
> - u32 first;
> - u32 lower_first;
> - u32 count;
> - } extent[UID_GID_MAP_MAX_EXTENTS];
> + union {
> + struct uid_gid_extent extent[UID_GID_MAP_MAX_EXTENTS];
> + struct {
> + struct uid_gid_extent *forward;
> + struct uid_gid_extent *reverse;
> + };
> + };
> };
>
> #define USERNS_SETGROUPS_ALLOWED 1UL
> --
> 2.14.1
>
