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Message-ID: <1620830927-11828-14-git-send-email-dlinkin@nvidia.com>
Date: Wed, 12 May 2021 17:48:42 +0300
From: <dlinkin@...dia.com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <kuba@...nel.org>, <jiri@...dia.com>,
<stephen@...workplumber.org>, <dsahern@...il.com>,
<vladbu@...dia.com>, <parav@...dia.com>, <huyn@...dia.com>,
Dmytro Linkin <dlinkin@...dia.com>
Subject: [PATCH RFC net-next v2 13/18] netdevsim: Implement support for devlink rate nodes
From: Dmytro Linkin <dlinkin@...dia.com>
Implement new devlink ops that allow creation, deletion and setting of
shared/max tx rate of devlink rate nodes through devlink API.
Expose rate node and it's tx rates to netdevsim debugfs.
Co-developed-by: Vlad Buslov <vladbu@...dia.com>
Signed-off-by: Vlad Buslov <vladbu@...dia.com>
Signed-off-by: Dmytro Linkin <dlinkin@...dia.com>
Reviewed-by: Jiri Pirko <jiri@...dia.com>
---
drivers/net/netdevsim/dev.c | 78 +++++++++++++++++++++++++++++++++++++++
drivers/net/netdevsim/netdevsim.h | 1 +
2 files changed, 79 insertions(+)
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 5be6f7e..0346457 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -263,12 +263,16 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
nsim_dev->ddir,
nsim_dev->nsim_bus_dev,
&nsim_dev_max_vfs_fops);
+ nsim_dev->nodes_ddir = debugfs_create_dir("rate_nodes", nsim_dev->ddir);
+ if (IS_ERR(nsim_dev->nodes_ddir))
+ return PTR_ERR(nsim_dev->nodes_ddir);
nsim_udp_tunnels_debugfs_create(nsim_dev);
return 0;
}
static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
{
+ debugfs_remove_recursive(nsim_dev->nodes_ddir);
debugfs_remove_recursive(nsim_dev->ports_ddir);
debugfs_remove_recursive(nsim_dev->ddir);
}
@@ -1060,6 +1064,76 @@ static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
return 0;
}
+struct nsim_rate_node {
+ struct dentry *ddir;
+ u16 tx_share;
+ u16 tx_max;
+};
+
+static int nsim_node_tx_share_set(struct devlink_rate *devlink_rate, void *priv,
+ u64 tx_share, struct netlink_ext_ack *extack)
+{
+ struct nsim_rate_node *nsim_node = priv;
+ int err;
+
+ err = nsim_rate_bytes_to_units("tx_share", &tx_share, extack);
+ if (err)
+ return err;
+
+ nsim_node->tx_share = tx_share;
+ return 0;
+}
+
+static int nsim_node_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
+ u64 tx_max, struct netlink_ext_ack *extack)
+{
+ struct nsim_rate_node *nsim_node = priv;
+ int err;
+
+ err = nsim_rate_bytes_to_units("tx_max", &tx_max, extack);
+ if (err)
+ return err;
+
+ nsim_node->tx_max = tx_max;
+ return 0;
+}
+
+static int nsim_rate_node_new(struct devlink_rate *node, void **priv,
+ struct netlink_ext_ack *extack)
+{
+ struct nsim_dev *nsim_dev = devlink_priv(node->devlink);
+ struct nsim_rate_node *nsim_node;
+
+ if (!nsim_esw_mode_is_switchdev(nsim_dev)) {
+ NL_SET_ERR_MSG_MOD(extack, "Node creation allowed only in switchdev mode.");
+ return -EOPNOTSUPP;
+ }
+
+ nsim_node = kzalloc(sizeof(*nsim_node), GFP_KERNEL);
+ if (!nsim_node)
+ return -ENOMEM;
+
+ nsim_node->ddir = debugfs_create_dir(node->name, nsim_dev->nodes_ddir);
+ if (!nsim_node->ddir) {
+ kfree(nsim_node);
+ return -ENOMEM;
+ }
+ debugfs_create_u16("tx_share", 0400, nsim_node->ddir, &nsim_node->tx_share);
+ debugfs_create_u16("tx_max", 0400, nsim_node->ddir, &nsim_node->tx_max);
+ *priv = nsim_node;
+ return 0;
+}
+
+static int nsim_rate_node_del(struct devlink_rate *node, void *priv,
+ struct netlink_ext_ack *extack)
+{
+ struct nsim_rate_node *nsim_node = priv;
+
+ debugfs_remove_recursive(nsim_node->ddir);
+ kfree(nsim_node);
+ return 0;
+}
+
static const struct devlink_ops nsim_dev_devlink_ops = {
.eswitch_mode_set = nsim_devlink_eswitch_mode_set,
.eswitch_mode_get = nsim_devlink_eswitch_mode_get,
@@ -1077,6 +1151,10 @@ static int nsim_leaf_tx_max_set(struct devlink_rate *devlink_rate, void *priv,
.trap_policer_counter_get = nsim_dev_devlink_trap_policer_counter_get,
.rate_leaf_tx_share_set = nsim_leaf_tx_share_set,
.rate_leaf_tx_max_set = nsim_leaf_tx_max_set,
+ .rate_node_tx_share_set = nsim_node_tx_share_set,
+ .rate_node_tx_max_set = nsim_node_tx_max_set,
+ .rate_node_new = nsim_rate_node_new,
+ .rate_node_del = nsim_rate_node_del,
};
#define NSIM_DEV_MAX_MACS_DEFAULT 32
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
index 13a0042..d62a138 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -222,6 +222,7 @@ struct nsim_dev {
struct dentry *ports_ddir;
struct dentry *take_snapshot;
struct dentry *max_vfs;
+ struct dentry *nodes_ddir;
struct bpf_offload_dev *bpf_dev;
bool bpf_bind_accept;
bool bpf_bind_verifier_accept;
--
1.8.3.1
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