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net/devlink: Support setting hardware address of port function

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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 <parav@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Parav Pandit 2020-06-19 03:32:49 +00:00 committed by David S. Miller
parent 2a916ecc40
commit a1e8ae907c
2 changed files with 86 additions and 0 deletions
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10
include/net/devlink.h
View file

@ -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)

76
net/core/devlink.c
View file

@ -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[] = {