Re: [PATCH 2/2] netlink: Diag core and basic socket info dumping

From: Thomas Graf
Date: Thu Mar 21 2013 - 08:52:42 EST


On 03/21/13 at 01:21pm, Andrey Vagin wrote:
> diff --git a/include/uapi/linux/netlink_diag.h b/include/uapi/linux/netlink_diag.h
> new file mode 100644
> index 0000000..9328866
> --- /dev/null
> +++ b/include/uapi/linux/netlink_diag.h
> +enum {
> + NETLINK_DIAG_MEMINFO,
> + NETLINK_DIAG_GROUPS,
> +
> + NETLINK_DIAG_MAX,
> +};

Please follow the common pattern and define NETLINK_DIAG_MAX as
NETLINK_DIAG_GROUPS like other by doing>

[...]
__NETLINK_DIAG_MAX,
};

#define NETLINK_DIAG_MAX (__NETLINK_DIAG_MAX - 1)

Everyone is used to do:

struct nlattr *attrs[NETLINK_DIAG_MAX+1];

nla_parse([...], NETLINK_DIAG_MAX, [...]

In fact, the follow-up patch to ss is buggy because of this.
UNIX_DIAG_MAX suffers from the same problem which is problem the
cause for this.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/