PCI PF and VF devlink port can manage the function represented by a
devlink port.
Allow users to set port function's hardware address.
Example of a PCI VF port which supports a port function:
$ devlink port show pci/0000:06:00.0/2
pci/0000:06:00.0/2: type eth netdev enp6s0pf0vf1 flavour pcivf pfnum 0 vfnum 1
function:
hw_addr 00:00:00:00:00:00
$ devlink port function set pci/0000:06:00.0/2 hw_addr 00:11:22:33:44:55
$ devlink port show pci/0000:06:00.0/2
pci/0000:06:00.0/2: type eth netdev enp6s0pf0vf1 flavour pcivf pfnum 0 vfnum 1
function:
hw_addr 00:11:22:33:44:55
Signed-off-by: Parav Pandit <pa...@mellanox.com>
Reviewed-by: Jiri Pirko <j...@mellanox.com>
---
include/net/devlink.h | 10 ++++++
net/core/devlink.c | 76 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 86 insertions(+)
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 56fc9cdb189d..7007f93585a5 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1119,6 +1119,16 @@ struct devlink_ops {
int (*port_function_hw_addr_get)(struct devlink *devlink, struct
devlink_port *port,
u8 *hw_addr, int *hw_addr_len,
struct netlink_ext_ack *extack);
+ /**
+ * @port_function_hw_addr_set: Port function's hardware address set
function.
+ *
+ * Should be used by device drivers to set the hardware address of a
function managed
+ * by the devlink port. Driver should return -EOPNOTSUPP if it doesn't
support port
+ * function handling for a particular port.
+ */
+ int (*port_function_hw_addr_set)(struct devlink *devlink, struct
devlink_port *port,
+ const u8 *hw_addr, int hw_addr_len,
+ struct netlink_ext_ack *extack);
};
static inline void *devlink_priv(struct devlink *devlink)
diff --git a/net/core/devlink.c b/net/core/devlink.c
index b6848b607e9c..baa45eca6b5a 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -85,6 +85,10 @@ EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
+static const struct nla_policy
devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = {
+ [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY },
+};
+
static LIST_HEAD(devlink_list);
/* devlink_mutex
@@ -827,6 +831,67 @@ static int devlink_port_type_set(struct devlink *devlink,
return -EOPNOTSUPP;
}
+static int
+devlink_port_function_hw_addr_set(struct devlink *devlink, struct devlink_port
*port,
+ const struct nlattr *attr, struct
netlink_ext_ack *extack)
+{
+ const struct devlink_ops *ops;
+ const u8 *hw_addr;
+ int hw_addr_len;
+ int err;
+
+ hw_addr = nla_data(attr);
+ hw_addr_len = nla_len(attr);
+ if (hw_addr_len > MAX_ADDR_LEN) {
+ NL_SET_ERR_MSG_MOD(extack, "Port function hardware address too
long");
+ return -EINVAL;
+ }
+ if (port->type == DEVLINK_PORT_TYPE_ETH) {
+ if (hw_addr_len != ETH_ALEN) {
+ NL_SET_ERR_MSG_MOD(extack, "Address must be 6 bytes for
Ethernet device");
+ return -EINVAL;
+ }
+ if (!is_unicast_ether_addr(hw_addr)) {
+ NL_SET_ERR_MSG_MOD(extack, "Non-unicast hardware
address unsupported");
+ return -EINVAL;
+ }
+ }
+
+ ops = devlink->ops;
+ if (!ops->port_function_hw_addr_set) {
+ NL_SET_ERR_MSG_MOD(extack, "Port doesn't support function
attributes");
+ return -EOPNOTSUPP;
+ }
+
+ err = ops->port_function_hw_addr_set(devlink, port, hw_addr,
hw_addr_len, extack);
+ if (err)
+ return err;
+
+ devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
+ return 0;
+}
+
+static int
+devlink_port_function_set(struct devlink *devlink, struct devlink_port *port,
+ const struct nlattr *attr, struct netlink_ext_ack
*extack)
+{
+ struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1];
+ int err;
+
+ err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr,
+ devlink_function_nl_policy, extack);
+ if (err < 0) {
+ NL_SET_ERR_MSG_MOD(extack, "Fail to parse port function
attributes");
+ return err;
+ }
+
+ attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
+ if (attr)
+ err = devlink_port_function_hw_addr_set(devlink, port, attr,
extack);
+
+ return err;
+}
+
static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
@@ -842,6 +907,16 @@ static int devlink_nl_cmd_port_set_doit(struct sk_buff
*skb,
if (err)
return err;
}
+
+ if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) {
+ struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION];
+ struct netlink_ext_ack *extack = info->extack;
+
+ err = devlink_port_function_set(devlink, devlink_port, attr,
extack);
+ if (err)
+ return err;
+ }
+
return 0;
}
@@ -6758,6 +6833,7 @@ static const struct nla_policy
devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_TRAP_POLICER_ID] = { .type = NLA_U32 },
[DEVLINK_ATTR_TRAP_POLICER_RATE] = { .type = NLA_U64 },
[DEVLINK_ATTR_TRAP_POLICER_BURST] = { .type = NLA_U64 },
+ [DEVLINK_ATTR_PORT_FUNCTION] = { .type = NLA_NESTED },
};
static const struct genl_ops devlink_nl_ops[] = {
--
2.19.2
