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Date: Sun, 29 Mar 2015 19:11:31 +0300
From: Vlad Zolotarov <vladz@...udius-systems.com>
To: netdev@...r.kernel.org
Cc: jeffrey.t.kirsher@...el.com, avi@...udius-systems.com,
gleb@...udius-systems.com,
Vlad Zolotarov <vladz@...udius-systems.com>
Subject: [PATCH net-next v9 1/7] if_link: Add an additional parameter to ifla_vf_info for RSS querying
Add configuration setting for drivers to allow/block an RSS Redirection Table and
a Hash Key querying for discrete VFs.
On some devices VF share the mentioned above information with PF and querying it may
adduce a theoretical security risk. We want to let a system administrator to decide if he/she
wants to take this risk or not.
Signed-off-by: Vlad Zolotarov <vladz@...udius-systems.com>
---
include/linux/if_link.h | 1 +
include/linux/netdevice.h | 8 ++++++++
include/uapi/linux/if_link.h | 8 ++++++++
net/core/rtnetlink.c | 32 ++++++++++++++++++++++++++------
4 files changed, 43 insertions(+), 6 deletions(-)
diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 119130e..da49299 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -14,5 +14,6 @@ struct ifla_vf_info {
__u32 linkstate;
__u32 min_tx_rate;
__u32 max_tx_rate;
+ __u32 rss_query_en;
};
#endif /* _LINUX_IF_LINK_H */
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 08c4ab3..a858cda 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -875,6 +875,11 @@ typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
* int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
* int (*ndo_set_vf_port)(struct net_device *dev, int vf,
* struct nlattr *port[]);
+ *
+ * Enable or disable the VF ability to query its RSS Redirection Table and
+ * Hash Key. This is needed since on some devices VF share this information
+ * with PF and querying it may adduce a theoretical security risk.
+ * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
* int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
* int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
* Called to setup 'tc' number of traffic classes in the net device. This
@@ -1094,6 +1099,9 @@ struct net_device_ops {
struct nlattr *port[]);
int (*ndo_get_vf_port)(struct net_device *dev,
int vf, struct sk_buff *skb);
+ int (*ndo_set_vf_rss_query_en)(
+ struct net_device *dev,
+ int vf, bool setting);
int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
#if IS_ENABLED(CONFIG_FCOE)
int (*ndo_fcoe_enable)(struct net_device *dev);
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 7ffb18d..d9cd192 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -465,6 +465,9 @@ enum {
IFLA_VF_SPOOFCHK, /* Spoof Checking on/off switch */
IFLA_VF_LINK_STATE, /* link state enable/disable/auto switch */
IFLA_VF_RATE, /* Min and Max TX Bandwidth Allocation */
+ IFLA_VF_RSS_QUERY_EN, /* RSS Redirection Table and Hash Key query
+ * on/off switch
+ */
__IFLA_VF_MAX,
};
@@ -509,6 +512,11 @@ struct ifla_vf_link_state {
__u32 link_state;
};
+struct ifla_vf_rss_query_en {
+ __u32 vf;
+ __u32 setting;
+};
+
/* VF ports management section
*
* Nested layout of set/get msg is:
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index b96ac21..dcbf568 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -818,7 +818,8 @@ static inline int rtnl_vfinfo_size(const struct net_device *dev,
nla_total_size(sizeof(struct ifla_vf_vlan)) +
nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
nla_total_size(sizeof(struct ifla_vf_rate)) +
- nla_total_size(sizeof(struct ifla_vf_link_state)));
+ nla_total_size(sizeof(struct ifla_vf_link_state)) +
+ nla_total_size(sizeof(struct ifla_vf_rss_query_en)));
return size;
} else
return 0;
@@ -1132,14 +1133,16 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
struct ifla_vf_tx_rate vf_tx_rate;
struct ifla_vf_spoofchk vf_spoofchk;
struct ifla_vf_link_state vf_linkstate;
+ struct ifla_vf_rss_query_en vf_rss_query_en;
/*
* Not all SR-IOV capable drivers support the
- * spoofcheck query. Preset to -1 so the user
- * space tool can detect that the driver didn't
- * report anything.
+ * spoofcheck and "RSS query enable" query. Preset to
+ * -1 so the user space tool can detect that the driver
+ * didn't report anything.
*/
ivi.spoofchk = -1;
+ ivi.rss_query_en = -1;
memset(ivi.mac, 0, sizeof(ivi.mac));
/* The default value for VF link state is "auto"
* IFLA_VF_LINK_STATE_AUTO which equals zero
@@ -1152,7 +1155,8 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
vf_rate.vf =
vf_tx_rate.vf =
vf_spoofchk.vf =
- vf_linkstate.vf = ivi.vf;
+ vf_linkstate.vf =
+ vf_rss_query_en.vf = ivi.vf;
memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
vf_vlan.vlan = ivi.vlan;
@@ -1162,6 +1166,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
vf_rate.max_tx_rate = ivi.max_tx_rate;
vf_spoofchk.setting = ivi.spoofchk;
vf_linkstate.link_state = ivi.linkstate;
+ vf_rss_query_en.setting = ivi.rss_query_en;
vf = nla_nest_start(skb, IFLA_VF_INFO);
if (!vf) {
nla_nest_cancel(skb, vfinfo);
@@ -1176,7 +1181,10 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
&vf_spoofchk) ||
nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
- &vf_linkstate))
+ &vf_linkstate) ||
+ nla_put(skb, IFLA_VF_RSS_QUERY_EN,
+ sizeof(vf_rss_query_en),
+ &vf_rss_query_en))
goto nla_put_failure;
nla_nest_end(skb, vf);
}
@@ -1290,6 +1298,7 @@ static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
[IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
[IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
[IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
+ [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
};
static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
@@ -1500,6 +1509,17 @@ static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
ivl->link_state);
break;
}
+ case IFLA_VF_RSS_QUERY_EN: {
+ struct ifla_vf_rss_query_en *ivrssq_en;
+
+ ivrssq_en = nla_data(vf);
+ err = -EOPNOTSUPP;
+ if (ops->ndo_set_vf_rss_query_en)
+ err = ops->ndo_set_vf_rss_query_en(dev,
+ ivrssq_en->vf,
+ ivrssq_en->setting);
+ break;
+ }
default:
err = -EINVAL;
break;
--
2.1.0
--
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