diff mbox series

[net-next,v4,6/7] net: nexthop: Add ability to enable / disable hardware statistics

Message ID 957be0d4dc6f452bca4a4cb8be348ac705d022a3.1709727981.git.petrm@nvidia.com (mailing list archive)
State Superseded
Commit 746c19a52ec50b81422fd4772254d55e588d7df6
Delegated to: Netdev Maintainers
Headers show
Series Support for nexthop group statistics | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1259 this patch: 1259
netdev/build_tools success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 957 this patch: 957
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1298 this patch: 1298
netdev/checkpatch warning WARNING: line length of 107 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-03-06--21-00 (tests: 892)

Commit Message

Petr Machata March 6, 2024, 12:49 p.m. UTC 
From: Ido Schimmel <idosch@nvidia.com>

Add netlink support for enabling collection of HW statistics on nexthop
groups.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Petr Machata <petrm@nvidia.com>
---

Notes:
    v3:
    - Use a named constant for the NHA_HW_STATS_ENABLE policy.

 include/net/nexthop.h        |  2 ++
 include/uapi/linux/nexthop.h |  3 +++
 net/ipv4/nexthop.c           | 15 ++++++++++++++-
 3 files changed, 19 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/include/net/nexthop.h b/include/net/nexthop.h
index 584c37120c20..1ba6d3668518 100644
--- a/include/net/nexthop.h
+++ b/include/net/nexthop.h
@@ -47,6 +47,8 @@  struct nh_config {
 	bool		nh_grp_res_has_idle_timer;
 	bool		nh_grp_res_has_unbalanced_timer;
 
+	bool		nh_hw_stats;
+
 	struct nlattr	*nh_encap;
 	u16		nh_encap_type;
 
diff --git a/include/uapi/linux/nexthop.h b/include/uapi/linux/nexthop.h
index f4db63c17085..b86af80d4e09 100644
--- a/include/uapi/linux/nexthop.h
+++ b/include/uapi/linux/nexthop.h
@@ -68,6 +68,9 @@  enum {
 	/* nested; nexthop group stats */
 	NHA_GROUP_STATS,
 
+	/* u32; nexthop hardware stats enable */
+	NHA_HW_STATS_ENABLE,
+
 	__NHA_MAX,
 };
 
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index c0d14e16e9c8..e75b1aae5a81 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -39,6 +39,7 @@  static const struct nla_policy rtm_nh_policy_new[] = {
 	[NHA_ENCAP]		= { .type = NLA_NESTED },
 	[NHA_FDB]		= { .type = NLA_FLAG },
 	[NHA_RES_GROUP]		= { .type = NLA_NESTED },
+	[NHA_HW_STATS_ENABLE]	= NLA_POLICY_MAX(NLA_U32, true),
 };
 
 static const struct nla_policy rtm_nh_policy_get[] = {
@@ -778,7 +779,8 @@  static int nla_put_nh_group(struct sk_buff *skb, struct nexthop *nh,
 		goto nla_put_failure;
 
 	if (op_flags & NHA_OP_FLAG_DUMP_STATS &&
-	    nla_put_nh_group_stats(skb, nh))
+	    (nla_put_u32(skb, NHA_HW_STATS_ENABLE, nhg->hw_stats) ||
+	     nla_put_nh_group_stats(skb, nh)))
 		goto nla_put_failure;
 
 	return 0;
@@ -1202,6 +1204,7 @@  static int nh_check_attr_group(struct net *net,
 		if (!tb[i])
 			continue;
 		switch (i) {
+		case NHA_HW_STATS_ENABLE:
 		case NHA_FDB:
 			continue;
 		case NHA_RES_GROUP:
@@ -2622,6 +2625,9 @@  static struct nexthop *nexthop_create_group(struct net *net,
 	if (cfg->nh_fdb)
 		nhg->fdb_nh = 1;
 
+	if (cfg->nh_hw_stats)
+		nhg->hw_stats = true;
+
 	rcu_assign_pointer(nh->nh_grp, nhg);
 
 	return nh;
@@ -2964,6 +2970,9 @@  static int rtm_to_nh_config(struct net *net, struct sk_buff *skb,
 			err = rtm_to_nh_config_grp_res(tb[NHA_RES_GROUP],
 						       cfg, extack);
 
+		if (tb[NHA_HW_STATS_ENABLE])
+			cfg->nh_hw_stats = nla_get_u32(tb[NHA_HW_STATS_ENABLE]);
+
 		/* no other attributes should be set */
 		goto out;
 	}
@@ -3055,6 +3064,10 @@  static int rtm_to_nh_config(struct net *net, struct sk_buff *skb,
 		goto out;
 	}
 
+	if (tb[NHA_HW_STATS_ENABLE]) {
+		NL_SET_ERR_MSG(extack, "Cannot enable nexthop hardware statistics for non-group nexthops");
+		goto out;
+	}
 
 	err = 0;
 out: