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Date: Wed, 14 Sep 2016 11:28:41 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, nogahf@...lanox.com, idosch@...lanox.com,
eladr@...lanox.com, yotamg@...lanox.com, ogerlitz@...lanox.com,
roopa@...ulusnetworks.com, nikolay@...ulusnetworks.com,
linville@...driver.com, tgraf@...g.ch, gospo@...ulusnetworks.com,
sfeldma@...il.com, sd@...asysnail.net, eranbe@...lanox.com,
ast@...mgrid.com, edumazet@...gle.com, hannes@...essinduktion.org,
f.fainelli@...il.com, dsa@...ulusnetworks.com
Subject: [patch net-next v9 2/3] net: core: Add offload stats to if_stats_msg
From: Nogah Frankel <nogahf@...lanox.com>
Add a nested attribute of offload stats to if_stats_msg
named IFLA_STATS_LINK_OFFLOAD_XSTATS.
Under it, add SW stats, meaning stats only per packets that went via
slowpath to the cpu, named IFLA_OFFLOAD_XSTATS_CPU_HIT.
Signed-off-by: Nogah Frankel <nogahf@...lanox.com>
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
include/uapi/linux/if_link.h | 9 ++++
net/core/rtnetlink.c | 111 +++++++++++++++++++++++++++++++++++++++++--
2 files changed, 116 insertions(+), 4 deletions(-)
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 9bf3aec..2351776 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -826,6 +826,7 @@ enum {
IFLA_STATS_LINK_64,
IFLA_STATS_LINK_XSTATS,
IFLA_STATS_LINK_XSTATS_SLAVE,
+ IFLA_STATS_LINK_OFFLOAD_XSTATS,
__IFLA_STATS_MAX,
};
@@ -845,6 +846,14 @@ enum {
};
#define LINK_XSTATS_TYPE_MAX (__LINK_XSTATS_TYPE_MAX - 1)
+/* These are stats embedded into IFLA_STATS_LINK_OFFLOAD_XSTATS */
+enum {
+ IFLA_OFFLOAD_XSTATS_UNSPEC,
+ IFLA_OFFLOAD_XSTATS_CPU_HIT, /* struct rtnl_link_stats64 */
+ __IFLA_OFFLOAD_XSTATS_MAX
+};
+#define IFLA_OFFLOAD_XSTATS_MAX (__IFLA_OFFLOAD_XSTATS_MAX - 1)
+
/* XDP section */
enum {
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 937e459..ae2048a 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3577,6 +3577,91 @@ static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
(!idxattr || idxattr == attrid);
}
+#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
+static int rtnl_get_offload_stats_attr_size(int attr_id)
+{
+ switch (attr_id) {
+ case IFLA_OFFLOAD_XSTATS_CPU_HIT:
+ return sizeof(struct rtnl_link_stats64);
+ }
+
+ return 0;
+}
+
+static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
+ int *prividx)
+{
+ struct nlattr *attr = NULL;
+ int attr_id, size;
+ void *attr_data;
+ int err;
+
+ if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
+ dev->netdev_ops->ndo_get_offload_stats))
+ return -ENODATA;
+
+ for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
+ attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
+ if (attr_id < *prividx)
+ continue;
+
+ size = rtnl_get_offload_stats_attr_size(attr_id);
+ if (!size)
+ continue;
+
+ if (!dev->netdev_ops->ndo_has_offload_stats(attr_id))
+ continue;
+
+ attr = nla_reserve_64bit(skb, attr_id, size,
+ IFLA_OFFLOAD_XSTATS_UNSPEC);
+ if (!attr)
+ goto nla_put_failure;
+
+ attr_data = nla_data(attr);
+ memset(attr_data, 0, size);
+ err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
+ attr_data);
+ if (err)
+ goto get_offload_stats_failure;
+ }
+
+ if (!attr)
+ return -ENODATA;
+
+ *prividx = 0;
+ return 0;
+
+nla_put_failure:
+ err = -EMSGSIZE;
+get_offload_stats_failure:
+ *prividx = attr_id;
+ return err;
+}
+
+static int rtnl_get_offload_stats_size(const struct net_device *dev)
+{
+ int nla_size = 0;
+ int attr_id;
+ int size;
+
+ if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
+ dev->netdev_ops->ndo_get_offload_stats))
+ return 0;
+
+ for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
+ attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
+ if (!dev->netdev_ops->ndo_has_offload_stats(attr_id))
+ continue;
+ size = rtnl_get_offload_stats_attr_size(attr_id);
+ nla_size += nla_total_size_64bit(size);
+ }
+
+ if (nla_size != 0)
+ nla_size += nla_total_size(0);
+
+ return nla_size;
+}
+
static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
int type, u32 pid, u32 seq, u32 change,
unsigned int flags, unsigned int filter_mask,
@@ -3586,6 +3671,7 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
struct nlmsghdr *nlh;
struct nlattr *attr;
int s_prividx = *prividx;
+ int err;
ASSERT_RTNL();
@@ -3614,8 +3700,6 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
if (ops && ops->fill_linkxstats) {
- int err;
-
*idxattr = IFLA_STATS_LINK_XSTATS;
attr = nla_nest_start(skb,
IFLA_STATS_LINK_XSTATS);
@@ -3639,8 +3723,6 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
if (master)
ops = master->rtnl_link_ops;
if (ops && ops->fill_linkxstats) {
- int err;
-
*idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
attr = nla_nest_start(skb,
IFLA_STATS_LINK_XSTATS_SLAVE);
@@ -3655,6 +3737,24 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
}
}
+ if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
+ *idxattr)) {
+ *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
+ attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
+ if (!attr)
+ goto nla_put_failure;
+
+ err = rtnl_get_offload_stats(skb, dev, prividx);
+ if (err == -ENODATA)
+ nla_nest_cancel(skb, attr);
+ else
+ nla_nest_end(skb, attr);
+
+ if ((err) && (err != -ENODATA))
+ goto nla_put_failure;
+ *idxattr = 0;
+ }
+
nlmsg_end(skb, nlh);
return 0;
@@ -3708,6 +3808,9 @@ static size_t if_nlmsg_stats_size(const struct net_device *dev,
}
}
+ if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
+ size += rtnl_get_offload_stats_size(dev);
+
return size;
}
--
2.5.5
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