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This switchdev attribute offers a counterproductive API for a driver writer, because although br_switchdev_set_port_flag gets passed a "flags" and a "mask", those are passed piecemeal to the driver, so while the PRE_BRIDGE_FLAGS listener knows what changed because it has the "mask", the BRIDGE_FLAGS listener doesn't, because it only has the final value. But certain drivers can offload only certain combinations of settings, like for example they cannot change unicast flooding independently of multicast flooding - they must be both on or both off. The way the information is passed to switchdev makes drivers not expressive enough, and unable to reject this request ahead of time, in the PRE_BRIDGE_FLAGS notifier, so they are forced to reject it during the deferred BRIDGE_FLAGS attribute, where the rejection is currently ignored. This patch also changes drivers to make use of the "mask" field for edge detection when possible. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
389 lines
10 KiB
C
389 lines
10 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* include/net/switchdev.h - Switch device API
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* Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us>
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* Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
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*/
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#ifndef _LINUX_SWITCHDEV_H_
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#define _LINUX_SWITCHDEV_H_
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#include <linux/netdevice.h>
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#include <linux/notifier.h>
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#include <linux/list.h>
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#include <net/ip_fib.h>
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#define SWITCHDEV_F_NO_RECURSE BIT(0)
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#define SWITCHDEV_F_SKIP_EOPNOTSUPP BIT(1)
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#define SWITCHDEV_F_DEFER BIT(2)
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enum switchdev_attr_id {
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SWITCHDEV_ATTR_ID_UNDEFINED,
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SWITCHDEV_ATTR_ID_PORT_STP_STATE,
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SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
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SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS,
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SWITCHDEV_ATTR_ID_PORT_MROUTER,
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SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
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SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
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SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL,
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SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
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SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
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#if IS_ENABLED(CONFIG_BRIDGE_MRP)
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SWITCHDEV_ATTR_ID_MRP_PORT_ROLE,
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#endif
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};
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struct switchdev_brport_flags {
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unsigned long val;
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unsigned long mask;
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};
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struct switchdev_attr {
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struct net_device *orig_dev;
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enum switchdev_attr_id id;
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u32 flags;
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void *complete_priv;
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void (*complete)(struct net_device *dev, int err, void *priv);
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union {
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u8 stp_state; /* PORT_STP_STATE */
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struct switchdev_brport_flags brport_flags; /* PORT_BRIDGE_FLAGS */
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bool mrouter; /* PORT_MROUTER */
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clock_t ageing_time; /* BRIDGE_AGEING_TIME */
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bool vlan_filtering; /* BRIDGE_VLAN_FILTERING */
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u16 vlan_protocol; /* BRIDGE_VLAN_PROTOCOL */
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bool mc_disabled; /* MC_DISABLED */
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#if IS_ENABLED(CONFIG_BRIDGE_MRP)
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u8 mrp_port_role; /* MRP_PORT_ROLE */
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#endif
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} u;
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};
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enum switchdev_obj_id {
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SWITCHDEV_OBJ_ID_UNDEFINED,
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SWITCHDEV_OBJ_ID_PORT_VLAN,
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SWITCHDEV_OBJ_ID_PORT_MDB,
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SWITCHDEV_OBJ_ID_HOST_MDB,
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#if IS_ENABLED(CONFIG_BRIDGE_MRP)
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SWITCHDEV_OBJ_ID_MRP,
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SWITCHDEV_OBJ_ID_RING_TEST_MRP,
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SWITCHDEV_OBJ_ID_RING_ROLE_MRP,
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SWITCHDEV_OBJ_ID_RING_STATE_MRP,
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SWITCHDEV_OBJ_ID_IN_TEST_MRP,
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SWITCHDEV_OBJ_ID_IN_ROLE_MRP,
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SWITCHDEV_OBJ_ID_IN_STATE_MRP,
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#endif
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};
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struct switchdev_obj {
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struct net_device *orig_dev;
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enum switchdev_obj_id id;
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u32 flags;
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void *complete_priv;
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void (*complete)(struct net_device *dev, int err, void *priv);
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};
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/* SWITCHDEV_OBJ_ID_PORT_VLAN */
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struct switchdev_obj_port_vlan {
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struct switchdev_obj obj;
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u16 flags;
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u16 vid;
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};
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#define SWITCHDEV_OBJ_PORT_VLAN(OBJ) \
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container_of((OBJ), struct switchdev_obj_port_vlan, obj)
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/* SWITCHDEV_OBJ_ID_PORT_MDB */
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struct switchdev_obj_port_mdb {
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struct switchdev_obj obj;
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unsigned char addr[ETH_ALEN];
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u16 vid;
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};
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#define SWITCHDEV_OBJ_PORT_MDB(OBJ) \
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container_of((OBJ), struct switchdev_obj_port_mdb, obj)
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#if IS_ENABLED(CONFIG_BRIDGE_MRP)
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/* SWITCHDEV_OBJ_ID_MRP */
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struct switchdev_obj_mrp {
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struct switchdev_obj obj;
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struct net_device *p_port;
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struct net_device *s_port;
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u32 ring_id;
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u16 prio;
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};
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#define SWITCHDEV_OBJ_MRP(OBJ) \
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container_of((OBJ), struct switchdev_obj_mrp, obj)
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/* SWITCHDEV_OBJ_ID_RING_TEST_MRP */
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struct switchdev_obj_ring_test_mrp {
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struct switchdev_obj obj;
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/* The value is in us and a value of 0 represents to stop */
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u32 interval;
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u8 max_miss;
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u32 ring_id;
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u32 period;
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bool monitor;
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};
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#define SWITCHDEV_OBJ_RING_TEST_MRP(OBJ) \
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container_of((OBJ), struct switchdev_obj_ring_test_mrp, obj)
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/* SWICHDEV_OBJ_ID_RING_ROLE_MRP */
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struct switchdev_obj_ring_role_mrp {
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struct switchdev_obj obj;
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u8 ring_role;
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u32 ring_id;
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};
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#define SWITCHDEV_OBJ_RING_ROLE_MRP(OBJ) \
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container_of((OBJ), struct switchdev_obj_ring_role_mrp, obj)
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struct switchdev_obj_ring_state_mrp {
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struct switchdev_obj obj;
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u8 ring_state;
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u32 ring_id;
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};
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#define SWITCHDEV_OBJ_RING_STATE_MRP(OBJ) \
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container_of((OBJ), struct switchdev_obj_ring_state_mrp, obj)
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/* SWITCHDEV_OBJ_ID_IN_TEST_MRP */
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struct switchdev_obj_in_test_mrp {
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struct switchdev_obj obj;
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/* The value is in us and a value of 0 represents to stop */
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u32 interval;
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u32 in_id;
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u32 period;
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u8 max_miss;
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};
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#define SWITCHDEV_OBJ_IN_TEST_MRP(OBJ) \
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container_of((OBJ), struct switchdev_obj_in_test_mrp, obj)
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/* SWICHDEV_OBJ_ID_IN_ROLE_MRP */
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struct switchdev_obj_in_role_mrp {
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struct switchdev_obj obj;
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struct net_device *i_port;
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u32 ring_id;
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u16 in_id;
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u8 in_role;
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};
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#define SWITCHDEV_OBJ_IN_ROLE_MRP(OBJ) \
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container_of((OBJ), struct switchdev_obj_in_role_mrp, obj)
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struct switchdev_obj_in_state_mrp {
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struct switchdev_obj obj;
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u32 in_id;
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u8 in_state;
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};
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#define SWITCHDEV_OBJ_IN_STATE_MRP(OBJ) \
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container_of((OBJ), struct switchdev_obj_in_state_mrp, obj)
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#endif
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typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
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enum switchdev_notifier_type {
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SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
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SWITCHDEV_FDB_DEL_TO_BRIDGE,
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SWITCHDEV_FDB_ADD_TO_DEVICE,
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SWITCHDEV_FDB_DEL_TO_DEVICE,
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SWITCHDEV_FDB_OFFLOADED,
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SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
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SWITCHDEV_PORT_OBJ_ADD, /* Blocking. */
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SWITCHDEV_PORT_OBJ_DEL, /* Blocking. */
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SWITCHDEV_PORT_ATTR_SET, /* May be blocking . */
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SWITCHDEV_VXLAN_FDB_ADD_TO_BRIDGE,
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SWITCHDEV_VXLAN_FDB_DEL_TO_BRIDGE,
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SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,
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SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE,
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SWITCHDEV_VXLAN_FDB_OFFLOADED,
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};
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struct switchdev_notifier_info {
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struct net_device *dev;
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struct netlink_ext_ack *extack;
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};
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struct switchdev_notifier_fdb_info {
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struct switchdev_notifier_info info; /* must be first */
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const unsigned char *addr;
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u16 vid;
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u8 added_by_user:1,
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offloaded:1;
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};
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struct switchdev_notifier_port_obj_info {
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struct switchdev_notifier_info info; /* must be first */
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const struct switchdev_obj *obj;
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bool handled;
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};
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struct switchdev_notifier_port_attr_info {
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struct switchdev_notifier_info info; /* must be first */
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const struct switchdev_attr *attr;
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bool handled;
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};
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static inline struct net_device *
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switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
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{
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return info->dev;
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}
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static inline struct netlink_ext_ack *
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switchdev_notifier_info_to_extack(const struct switchdev_notifier_info *info)
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{
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return info->extack;
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}
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#ifdef CONFIG_NET_SWITCHDEV
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void switchdev_deferred_process(void);
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int switchdev_port_attr_set(struct net_device *dev,
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const struct switchdev_attr *attr);
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int switchdev_port_obj_add(struct net_device *dev,
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const struct switchdev_obj *obj,
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struct netlink_ext_ack *extack);
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int switchdev_port_obj_del(struct net_device *dev,
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const struct switchdev_obj *obj);
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int register_switchdev_notifier(struct notifier_block *nb);
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int unregister_switchdev_notifier(struct notifier_block *nb);
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int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
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struct switchdev_notifier_info *info,
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struct netlink_ext_ack *extack);
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int register_switchdev_blocking_notifier(struct notifier_block *nb);
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int unregister_switchdev_blocking_notifier(struct notifier_block *nb);
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int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
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struct switchdev_notifier_info *info,
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struct netlink_ext_ack *extack);
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void switchdev_port_fwd_mark_set(struct net_device *dev,
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struct net_device *group_dev,
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bool joining);
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int switchdev_handle_port_obj_add(struct net_device *dev,
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struct switchdev_notifier_port_obj_info *port_obj_info,
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bool (*check_cb)(const struct net_device *dev),
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int (*add_cb)(struct net_device *dev,
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const struct switchdev_obj *obj,
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struct netlink_ext_ack *extack));
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int switchdev_handle_port_obj_del(struct net_device *dev,
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struct switchdev_notifier_port_obj_info *port_obj_info,
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bool (*check_cb)(const struct net_device *dev),
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int (*del_cb)(struct net_device *dev,
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const struct switchdev_obj *obj));
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int switchdev_handle_port_attr_set(struct net_device *dev,
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struct switchdev_notifier_port_attr_info *port_attr_info,
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bool (*check_cb)(const struct net_device *dev),
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int (*set_cb)(struct net_device *dev,
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const struct switchdev_attr *attr,
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struct netlink_ext_ack *extack));
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#else
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static inline void switchdev_deferred_process(void)
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{
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}
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static inline int switchdev_port_attr_set(struct net_device *dev,
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const struct switchdev_attr *attr)
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{
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return -EOPNOTSUPP;
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}
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static inline int switchdev_port_obj_add(struct net_device *dev,
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const struct switchdev_obj *obj,
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struct netlink_ext_ack *extack)
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{
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return -EOPNOTSUPP;
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}
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static inline int switchdev_port_obj_del(struct net_device *dev,
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const struct switchdev_obj *obj)
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{
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return -EOPNOTSUPP;
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}
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static inline int register_switchdev_notifier(struct notifier_block *nb)
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{
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return 0;
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}
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static inline int unregister_switchdev_notifier(struct notifier_block *nb)
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{
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return 0;
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}
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static inline int call_switchdev_notifiers(unsigned long val,
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struct net_device *dev,
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struct switchdev_notifier_info *info,
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struct netlink_ext_ack *extack)
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{
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return NOTIFY_DONE;
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}
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static inline int
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register_switchdev_blocking_notifier(struct notifier_block *nb)
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{
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return 0;
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}
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static inline int
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unregister_switchdev_blocking_notifier(struct notifier_block *nb)
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{
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return 0;
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}
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static inline int
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call_switchdev_blocking_notifiers(unsigned long val,
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struct net_device *dev,
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struct switchdev_notifier_info *info,
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struct netlink_ext_ack *extack)
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{
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return NOTIFY_DONE;
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}
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static inline int
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switchdev_handle_port_obj_add(struct net_device *dev,
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struct switchdev_notifier_port_obj_info *port_obj_info,
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bool (*check_cb)(const struct net_device *dev),
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int (*add_cb)(struct net_device *dev,
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const struct switchdev_obj *obj,
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struct netlink_ext_ack *extack))
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{
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return 0;
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}
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static inline int
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switchdev_handle_port_obj_del(struct net_device *dev,
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struct switchdev_notifier_port_obj_info *port_obj_info,
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bool (*check_cb)(const struct net_device *dev),
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int (*del_cb)(struct net_device *dev,
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const struct switchdev_obj *obj))
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{
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return 0;
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}
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static inline int
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switchdev_handle_port_attr_set(struct net_device *dev,
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struct switchdev_notifier_port_attr_info *port_attr_info,
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bool (*check_cb)(const struct net_device *dev),
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int (*set_cb)(struct net_device *dev,
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const struct switchdev_attr *attr,
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struct netlink_ext_ack *extack))
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{
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return 0;
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}
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#endif
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#endif /* _LINUX_SWITCHDEV_H_ */
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