| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Wed, 3 May 2017 08:43:40 -0700
From: Greg Rose <gvrose8192@...il.com>
To: Jiri Pirko <jiri@...nulli.us>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
arkadis@...lanox.com,
Stephen Hemminger <stephen@...workplumber.org>,
"David S. Miller" <davem@...emloft.net>, mlxsw@...lanox.com,
David Ahern <dsa@...ulusnetworks.com>
Subject: Re: [patch iproute2 v2 1/2] devlink: Change netlink attribute validation
On Wed, May 3, 2017 at 4:25 AM, Jiri Pirko <jiri@...nulli.us> wrote:
> From: Arkadi Sharshevsky <arkadis@...lanox.com>
>
> Currently the netlink attribute resolving is done by a sequence of
> if's. Change the attribute resolving to table lookup.
>
> Signed-off-by: Arkadi Sharshevsky <arkadis@...lanox.com>
> Signed-off-by: Jiri Pirko <jiri@...lanox.com>
> ---
> devlink/devlink.c | 103 ++++++++++++++++--------------------------------------
> 1 file changed, 30 insertions(+), 73 deletions(-)
>
> diff --git a/devlink/devlink.c b/devlink/devlink.c
> index e90226e..35220d8 100644
> --- a/devlink/devlink.c
> +++ b/devlink/devlink.c
> @@ -232,88 +232,45 @@ static bool dl_no_arg(struct dl *dl)
> return dl_argc(dl) == 0;
> }
>
> +static const enum mnl_attr_data_type devlink_policy[DEVLINK_ATTR_MAX + 1] = {
> + [DEVLINK_ATTR_BUS_NAME] = MNL_TYPE_NUL_STRING,
> + [DEVLINK_ATTR_DEV_NAME] = MNL_TYPE_NUL_STRING,
> + [DEVLINK_ATTR_PORT_INDEX] = MNL_TYPE_U32,
> + [DEVLINK_ATTR_PORT_TYPE] = MNL_TYPE_U16,
> + [DEVLINK_ATTR_PORT_DESIRED_TYPE] = MNL_TYPE_U16,
> + [DEVLINK_ATTR_PORT_NETDEV_IFINDEX] = MNL_TYPE_U32,
> + [DEVLINK_ATTR_PORT_NETDEV_NAME] = MNL_TYPE_NUL_STRING,
> + [DEVLINK_ATTR_PORT_IBDEV_NAME] = MNL_TYPE_NUL_STRING,
> + [DEVLINK_ATTR_SB_INDEX] = MNL_TYPE_U32,
> + [DEVLINK_ATTR_SB_SIZE] = MNL_TYPE_U32,
> + [DEVLINK_ATTR_SB_INGRESS_POOL_COUNT] = MNL_TYPE_U16,
> + [DEVLINK_ATTR_SB_EGRESS_POOL_COUNT] = MNL_TYPE_U16,
> + [DEVLINK_ATTR_SB_INGRESS_TC_COUNT] = MNL_TYPE_U16,
> + [DEVLINK_ATTR_SB_EGRESS_TC_COUNT] = MNL_TYPE_U16,
> + [DEVLINK_ATTR_SB_POOL_INDEX] = MNL_TYPE_U16,
> + [DEVLINK_ATTR_SB_POOL_TYPE] = MNL_TYPE_U8,
> + [DEVLINK_ATTR_SB_POOL_SIZE] = MNL_TYPE_U32,
> + [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = MNL_TYPE_U8,
> + [DEVLINK_ATTR_SB_THRESHOLD] = MNL_TYPE_U32,
> + [DEVLINK_ATTR_SB_TC_INDEX] = MNL_TYPE_U16,
> + [DEVLINK_ATTR_SB_OCC_CUR] = MNL_TYPE_U32,
> + [DEVLINK_ATTR_SB_OCC_MAX] = MNL_TYPE_U32,
> + [DEVLINK_ATTR_ESWITCH_MODE] = MNL_TYPE_U16,
> + [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = MNL_TYPE_U8,
> +};
> +
> static int attr_cb(const struct nlattr *attr, void *data)
> {
> const struct nlattr **tb = data;
> int type;
>
> - type = mnl_attr_get_type(attr);
> -
> if (mnl_attr_type_valid(attr, DEVLINK_ATTR_MAX) < 0)
> return MNL_CB_ERROR;
>
> - if (type == DEVLINK_ATTR_BUS_NAME &&
> - mnl_attr_validate(attr, MNL_TYPE_NUL_STRING) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_DEV_NAME &&
> - mnl_attr_validate(attr, MNL_TYPE_NUL_STRING) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_PORT_INDEX &&
> - mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_PORT_TYPE &&
> - mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_PORT_DESIRED_TYPE &&
> - mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_PORT_NETDEV_IFINDEX &&
> - mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_PORT_NETDEV_NAME &&
> - mnl_attr_validate(attr, MNL_TYPE_NUL_STRING) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_PORT_IBDEV_NAME &&
> - mnl_attr_validate(attr, MNL_TYPE_NUL_STRING) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_INDEX &&
> - mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_SIZE &&
> - mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_INGRESS_POOL_COUNT &&
> - mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_EGRESS_POOL_COUNT &&
> - mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_INGRESS_TC_COUNT &&
> - mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_EGRESS_TC_COUNT &&
> - mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_POOL_INDEX &&
> - mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_POOL_TYPE &&
> - mnl_attr_validate(attr, MNL_TYPE_U8) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_POOL_SIZE &&
> - mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE &&
> - mnl_attr_validate(attr, MNL_TYPE_U8) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_THRESHOLD &&
> - mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_TC_INDEX &&
> - mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_OCC_CUR &&
> - mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_SB_OCC_MAX &&
> - mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_ESWITCH_MODE &&
> - mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
> - return MNL_CB_ERROR;
> - if (type == DEVLINK_ATTR_ESWITCH_INLINE_MODE &&
> - mnl_attr_validate(attr, MNL_TYPE_U8) < 0)
> + type = mnl_attr_get_type(attr);
> + if (mnl_attr_validate(attr, devlink_policy[type]) < 0)
> return MNL_CB_ERROR;
> +
> tb[type] = attr;
> return MNL_CB_OK;
> }
> --
> 2.7.4
>
Much better!!! LGTM.
Reviewed-by: Greg Rose <gvrose8192@...il.com>
Powered by blists - more mailing lists