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Date: Thu, 27 Jun 2024 22:17:20 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: netdev@...r.kernel.org
Cc: Jakub Kicinski <kuba@...nel.org>,
Jiri Pirko <jiri@...nulli.us>,
Madhu Chittim <madhu.chittim@...el.com>,
Sridhar Samudrala <sridhar.samudrala@...el.com>,
Simon Horman <horms@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Sunil Kovvuri Goutham <sgoutham@...vell.com>,
Jamal Hadi Salim <jhs@...atatu.com>
Subject: [PATCH net-next 3/5] netlink: spec: add shaper introspection support
Allow the user-space to fine-grain query the shaping features
supported by the NIC on each domain.
Signed-off-by: Paolo Abeni <pabeni@...hat.com>
---
Documentation/netlink/specs/shaper.yaml | 74 +++++++++++++++++++++++++
include/uapi/linux/net_shaper.h | 17 ++++++
net/shaper/shaper.c | 11 ++++
net/shaper/shaper_nl_gen.c | 25 +++++++++
net/shaper/shaper_nl_gen.h | 3 +
5 files changed, 130 insertions(+)
diff --git a/Documentation/netlink/specs/shaper.yaml b/Documentation/netlink/specs/shaper.yaml
index 8563c85de68d..2762aa9bc2bd 100644
--- a/Documentation/netlink/specs/shaper.yaml
+++ b/Documentation/netlink/specs/shaper.yaml
@@ -125,6 +125,51 @@ attribute-sets:
name: priority
-
name: weight
+ -
+ name: capabilities
+ attributes:
+ -
+ name: ifindex
+ type: u32
+ -
+ name: scope
+ type: u32
+ enum: scope
+ -
+ name: support-metric-bps
+ doc: the device accepts 'bps' metric for bw-min, bw-max and burst
+ type: flag
+ -
+ name: support-metric-pps
+ doc: the device accepts 'pps' metric for bw-min, bw-max and burst
+ type: flag
+ -
+ name: support-nesting
+ doc: |
+ the device supports nesting shaper belonging to this scope
+ below 'detached' scoped shapers. Only 'queue', 'netdev' and
+ 'detached' scope and flag 'support-nesting'.
+ type: flag
+ -
+ name: support-bw-min
+ doc: the device supports a minimum guaranteed bw
+ type: flag
+ -
+ name: support-bw-max
+ doc: the device supports maximum bw shaping
+ type: flag
+ -
+ name: support-burst
+ doc: the device supports a maximum burst size
+ type: flag
+ -
+ name: support-priority
+ doc: the device supports priority scheduling
+ type: flag
+ -
+ name: support-weight
+ doc: the device supports weighted round robin scheduling
+ type: flag
operations:
list:
@@ -200,3 +245,32 @@ operations:
reply:
attributes:
- modified
+
+ -
+ name: cap-get
+ doc: |
+ Get / Dump the shaper capabilities supported by the given device
+ attribute-set: capabilities
+
+ do:
+ request:
+ attributes:
+ - ifindex
+ - scope
+ reply:
+ attributes: &cap-attrs
+ - support-metric-bps
+ - support-metric-pps
+ - support-nesting
+ - support-bw-min
+ - support-bw-max
+ - support-burst
+ - support-priority
+ - support-weight
+
+ dump:
+ request:
+ attributes:
+ - ifindex
+ reply:
+ attributes: *cap-attrs
diff --git a/include/uapi/linux/net_shaper.h b/include/uapi/linux/net_shaper.h
index 7e6b655e6c6d..83cf94fe4a2f 100644
--- a/include/uapi/linux/net_shaper.h
+++ b/include/uapi/linux/net_shaper.h
@@ -61,10 +61,27 @@ enum {
NET_SHAPER_A_MAX = (__NET_SHAPER_A_MAX - 1)
};
+enum {
+ NET_SHAPER_A_CAPABILITIES_IFINDEX = 1,
+ NET_SHAPER_A_CAPABILITIES_SCOPE,
+ NET_SHAPER_A_CAPABILITIES_SUPPORT_METRIC_BPS,
+ NET_SHAPER_A_CAPABILITIES_SUPPORT_METRIC_PPS,
+ NET_SHAPER_A_CAPABILITIES_SUPPORT_NESTING,
+ NET_SHAPER_A_CAPABILITIES_SUPPORT_BW_MIN,
+ NET_SHAPER_A_CAPABILITIES_SUPPORT_BW_MAX,
+ NET_SHAPER_A_CAPABILITIES_SUPPORT_BURST,
+ NET_SHAPER_A_CAPABILITIES_SUPPORT_PRIORITY,
+ NET_SHAPER_A_CAPABILITIES_SUPPORT_WEIGHT,
+
+ __NET_SHAPER_A_CAPABILITIES_MAX,
+ NET_SHAPER_A_CAPABILITIES_MAX = (__NET_SHAPER_A_CAPABILITIES_MAX - 1)
+};
+
enum {
NET_SHAPER_CMD_GET = 1,
NET_SHAPER_CMD_SET,
NET_SHAPER_CMD_DELETE,
+ NET_SHAPER_CMD_CAP_GET,
__NET_SHAPER_CMD_MAX,
NET_SHAPER_CMD_MAX = (__NET_SHAPER_CMD_MAX - 1)
diff --git a/net/shaper/shaper.c b/net/shaper/shaper.c
index b1c63cfa21c4..74da98aaa078 100644
--- a/net/shaper/shaper.c
+++ b/net/shaper/shaper.c
@@ -558,6 +558,17 @@ int net_shaper_nl_delete_doit(struct sk_buff *skb, struct genl_info *info)
return ret;
}
+int net_shaper_nl_cap_get_doit(struct sk_buff *skb, struct genl_info *info)
+{
+ return 0;
+}
+
+int net_shaper_nl_cap_get_dumpit(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ return 0;
+}
+
void dev_shaper_flush(struct net_device *dev)
{
struct net_shaper_info *cur;
diff --git a/net/shaper/shaper_nl_gen.c b/net/shaper/shaper_nl_gen.c
index 159b4cb6d2b8..38dd6900d2c6 100644
--- a/net/shaper/shaper_nl_gen.c
+++ b/net/shaper/shaper_nl_gen.c
@@ -50,6 +50,17 @@ static const struct nla_policy net_shaper_delete_nl_policy[NET_SHAPER_A_HANDLES
[NET_SHAPER_A_HANDLES] = NLA_POLICY_NESTED(net_shaper_handle_nl_policy),
};
+/* NET_SHAPER_CMD_CAP_GET - do */
+static const struct nla_policy net_shaper_cap_get_do_nl_policy[NET_SHAPER_A_CAPABILITIES_SCOPE + 1] = {
+ [NET_SHAPER_A_CAPABILITIES_IFINDEX] = { .type = NLA_U32, },
+ [NET_SHAPER_A_CAPABILITIES_SCOPE] = NLA_POLICY_MAX(NLA_U32, 4),
+};
+
+/* NET_SHAPER_CMD_CAP_GET - dump */
+static const struct nla_policy net_shaper_cap_get_dump_nl_policy[NET_SHAPER_A_CAPABILITIES_IFINDEX + 1] = {
+ [NET_SHAPER_A_CAPABILITIES_IFINDEX] = { .type = NLA_U32, },
+};
+
/* Ops table for net_shaper */
static const struct genl_split_ops net_shaper_nl_ops[] = {
{
@@ -80,6 +91,20 @@ static const struct genl_split_ops net_shaper_nl_ops[] = {
.maxattr = NET_SHAPER_A_HANDLES,
.flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
},
+ {
+ .cmd = NET_SHAPER_CMD_CAP_GET,
+ .doit = net_shaper_nl_cap_get_doit,
+ .policy = net_shaper_cap_get_do_nl_policy,
+ .maxattr = NET_SHAPER_A_CAPABILITIES_SCOPE,
+ .flags = GENL_CMD_CAP_DO,
+ },
+ {
+ .cmd = NET_SHAPER_CMD_CAP_GET,
+ .dumpit = net_shaper_nl_cap_get_dumpit,
+ .policy = net_shaper_cap_get_dump_nl_policy,
+ .maxattr = NET_SHAPER_A_CAPABILITIES_IFINDEX,
+ .flags = GENL_CMD_CAP_DUMP,
+ },
};
struct genl_family net_shaper_nl_family __ro_after_init = {
diff --git a/net/shaper/shaper_nl_gen.h b/net/shaper/shaper_nl_gen.h
index 663406224d62..aa28ddc0a812 100644
--- a/net/shaper/shaper_nl_gen.h
+++ b/net/shaper/shaper_nl_gen.h
@@ -19,6 +19,9 @@ int net_shaper_nl_get_doit(struct sk_buff *skb, struct genl_info *info);
int net_shaper_nl_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
int net_shaper_nl_set_doit(struct sk_buff *skb, struct genl_info *info);
int net_shaper_nl_delete_doit(struct sk_buff *skb, struct genl_info *info);
+int net_shaper_nl_cap_get_doit(struct sk_buff *skb, struct genl_info *info);
+int net_shaper_nl_cap_get_dumpit(struct sk_buff *skb,
+ struct netlink_callback *cb);
extern struct genl_family net_shaper_nl_family;
--
2.45.1
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