net: switchdev: Remove bridge bypass support from switchdev

Currently the bridge port flags, vlans, FDBs and MDBs can be offloaded
through the bridge code, making the switchdev's SELF bridge bypass
implementation to be redundant. This implies several changes:
- No need for dump infra in switchdev, DSA's special case is handled
  privately.
- Remove obj_dump from switchdev_ops.
- FDBs are removed from obj_add/del routines, due to the fact that they
  are offloaded through the bridge notification chain.
- The switchdev_port_bridge_xx() and switchdev_port_fdb_xx() functions
  can be removed.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ivan Vecera <ivecera@redhat.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/switchdev.h

@@ -74,7 +74,6 @@ struct switchdev_attr {
 enum switchdev_obj_id {
 	SWITCHDEV_OBJ_ID_UNDEFINED,
 	SWITCHDEV_OBJ_ID_PORT_VLAN,
-	SWITCHDEV_OBJ_ID_PORT_FDB,
 	SWITCHDEV_OBJ_ID_PORT_MDB,
 };
 
@@ -97,17 +96,6 @@ struct switchdev_obj_port_vlan {
 #define SWITCHDEV_OBJ_PORT_VLAN(obj) \
 	container_of(obj, struct switchdev_obj_port_vlan, obj)
 
-/* SWITCHDEV_OBJ_ID_PORT_FDB */
-struct switchdev_obj_port_fdb {
-	struct switchdev_obj obj;
-	unsigned char addr[ETH_ALEN];
-	u16 vid;
-	u16 ndm_state;
-};
-
-#define SWITCHDEV_OBJ_PORT_FDB(obj) \
-	container_of(obj, struct switchdev_obj_port_fdb, obj)
-
 /* SWITCHDEV_OBJ_ID_PORT_MDB */
 struct switchdev_obj_port_mdb {
 	struct switchdev_obj obj;
@@ -135,8 +123,6 @@ typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj_*).
  *
  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj_*).
- *
- * @switchdev_port_obj_dump: Dump port objects (see switchdev_obj_*).
  */
 struct switchdev_ops {
 	int	(*switchdev_port_attr_get)(struct net_device *dev,
@@ -149,9 +135,6 @@ struct switchdev_ops {
 					  struct switchdev_trans *trans);
 	int	(*switchdev_port_obj_del)(struct net_device *dev,
 					  const struct switchdev_obj *obj);
-	int	(*switchdev_port_obj_dump)(struct net_device *dev,
-					   struct switchdev_obj *obj,
-					   switchdev_obj_dump_cb_t *cb);
 };
 
 enum switchdev_notifier_type {
@@ -189,25 +172,10 @@ int switchdev_port_obj_add(struct net_device *dev,
 			   const struct switchdev_obj *obj);
 int switchdev_port_obj_del(struct net_device *dev,
 			   const struct switchdev_obj *obj);
-int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj,
-			    switchdev_obj_dump_cb_t *cb);
 int register_switchdev_notifier(struct notifier_block *nb);
 int unregister_switchdev_notifier(struct notifier_block *nb);
 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 			     struct switchdev_notifier_info *info);
-int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
-				  struct net_device *dev, u32 filter_mask,
-				  int nlflags);
-int switchdev_port_bridge_setlink(struct net_device *dev,
-				  struct nlmsghdr *nlh, u16 flags);
-int switchdev_port_bridge_dellink(struct net_device *dev,
-				  struct nlmsghdr *nlh, u16 flags);
-int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
-			   struct net_device *dev, const unsigned char *addr,
-			   u16 vid, u16 nlm_flags);
-int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
-			   struct net_device *dev, const unsigned char *addr,
-			   u16 vid);
 void switchdev_port_fwd_mark_set(struct net_device *dev,
 				 struct net_device *group_dev,
 				 bool joining);
@@ -246,13 +214,6 @@ static inline int switchdev_port_obj_del(struct net_device *dev,
 	return -EOPNOTSUPP;
 }
 
-static inline int switchdev_port_obj_dump(struct net_device *dev,
-					  const struct switchdev_obj *obj,
-					  switchdev_obj_dump_cb_t *cb)
-{
-	return -EOPNOTSUPP;
-}
-
 static inline int register_switchdev_notifier(struct notifier_block *nb)
 {
 	return 0;
@@ -270,42 +231,6 @@ static inline int call_switchdev_notifiers(unsigned long val,
 	return NOTIFY_DONE;
 }
 
-static inline int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid,
-					    u32 seq, struct net_device *dev,
-					    u32 filter_mask, int nlflags)
-{
-	return -EOPNOTSUPP;
-}
-
-static inline int switchdev_port_bridge_setlink(struct net_device *dev,
-						struct nlmsghdr *nlh,
-						u16 flags)
-{
-	return -EOPNOTSUPP;
-}
-
-static inline int switchdev_port_bridge_dellink(struct net_device *dev,
-						struct nlmsghdr *nlh,
-						u16 flags)
-{
-	return -EOPNOTSUPP;
-}
-
-static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
-					 struct net_device *dev,
-					 const unsigned char *addr,
-					 u16 vid, u16 nlm_flags)
-{
-	return -EOPNOTSUPP;
-}
-
-static inline int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
-					 struct net_device *dev,
-					 const unsigned char *addr, u16 vid)
-{
-	return -EOPNOTSUPP;
-}
-
 static inline bool switchdev_port_same_parent_id(struct net_device *a,
 						 struct net_device *b)
 {

net/switchdev/switchdev.c

@@ -343,8 +343,6 @@ static size_t switchdev_obj_size(const struct switchdev_obj *obj)
 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		return sizeof(struct switchdev_obj_port_vlan);
-	case SWITCHDEV_OBJ_ID_PORT_FDB:
-		return sizeof(struct switchdev_obj_port_fdb);
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		return sizeof(struct switchdev_obj_port_mdb);
 	default:
@@ -534,43 +532,6 @@ int switchdev_port_obj_del(struct net_device *dev,
 }
 EXPORT_SYMBOL_GPL(switchdev_port_obj_del);
 
-/**
- *	switchdev_port_obj_dump - Dump port objects
- *
- *	@dev: port device
- *	@id: object ID
- *	@obj: object to dump
- *	@cb: function to call with a filled object
- *
- *	rtnl_lock must be held.
- */
-int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj,
-			    switchdev_obj_dump_cb_t *cb)
-{
-	const struct switchdev_ops *ops = dev->switchdev_ops;
-	struct net_device *lower_dev;
-	struct list_head *iter;
-	int err = -EOPNOTSUPP;
-
-	ASSERT_RTNL();
-
-	if (ops && ops->switchdev_port_obj_dump)
-		return ops->switchdev_port_obj_dump(dev, obj, cb);
-
-	/* Switch device port(s) may be stacked under
-	 * bond/team/vlan dev, so recurse down to dump objects on
-	 * first port at bottom of stack.
-	 */
-
-	netdev_for_each_lower_dev(dev, lower_dev, iter) {
-		err = switchdev_port_obj_dump(lower_dev, obj, cb);
-		break;
-	}
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(switchdev_port_obj_dump);
-
 static ATOMIC_NOTIFIER_HEAD(switchdev_notif_chain);
 
 /**
@@ -613,402 +574,6 @@ int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
 }
 EXPORT_SYMBOL_GPL(call_switchdev_notifiers);
 
-struct switchdev_vlan_dump {
-	struct switchdev_obj_port_vlan vlan;
-	struct sk_buff *skb;
-	u32 filter_mask;
-	u16 flags;
-	u16 begin;
-	u16 end;
-};
-
-static int switchdev_port_vlan_dump_put(struct switchdev_vlan_dump *dump)
-{
-	struct bridge_vlan_info vinfo;
-
-	vinfo.flags = dump->flags;
-
-	if (dump->begin == 0 && dump->end == 0) {
-		return 0;
-	} else if (dump->begin == dump->end) {
-		vinfo.vid = dump->begin;
-		if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO,
-			    sizeof(vinfo), &vinfo))
-			return -EMSGSIZE;
-	} else {
-		vinfo.vid = dump->begin;
-		vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
-		if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO,
-			    sizeof(vinfo), &vinfo))
-			return -EMSGSIZE;
-		vinfo.vid = dump->end;
-		vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
-		vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END;
-		if (nla_put(dump->skb, IFLA_BRIDGE_VLAN_INFO,
-			    sizeof(vinfo), &vinfo))
-			return -EMSGSIZE;
-	}
-
-	return 0;
-}
-
-static int switchdev_port_vlan_dump_cb(struct switchdev_obj *obj)
-{
-	struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
-	struct switchdev_vlan_dump *dump =
-		container_of(vlan, struct switchdev_vlan_dump, vlan);
-	int err = 0;
-
-	if (vlan->vid_begin > vlan->vid_end)
-		return -EINVAL;
-
-	if (dump->filter_mask & RTEXT_FILTER_BRVLAN) {
-		dump->flags = vlan->flags;
-		for (dump->begin = dump->end = vlan->vid_begin;
-		     dump->begin <= vlan->vid_end;
-		     dump->begin++, dump->end++) {
-			err = switchdev_port_vlan_dump_put(dump);
-			if (err)
-				return err;
-		}
-	} else if (dump->filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) {
-		if (dump->begin > vlan->vid_begin &&
-		    dump->begin >= vlan->vid_end) {
-			if ((dump->begin - 1) == vlan->vid_end &&
-			    dump->flags == vlan->flags) {
-				/* prepend */
-				dump->begin = vlan->vid_begin;
-			} else {
-				err = switchdev_port_vlan_dump_put(dump);
-				dump->flags = vlan->flags;
-				dump->begin = vlan->vid_begin;
-				dump->end = vlan->vid_end;
-			}
-		} else if (dump->end <= vlan->vid_begin &&
-		           dump->end < vlan->vid_end) {
-			if ((dump->end  + 1) == vlan->vid_begin &&
-			    dump->flags == vlan->flags) {
-				/* append */
-				dump->end = vlan->vid_end;
-			} else {
-				err = switchdev_port_vlan_dump_put(dump);
-				dump->flags = vlan->flags;
-				dump->begin = vlan->vid_begin;
-				dump->end = vlan->vid_end;
-			}
-		} else {
-			err = -EINVAL;
-		}
-	}
-
-	return err;
-}
-
-static int switchdev_port_vlan_fill(struct sk_buff *skb, struct net_device *dev,
-				    u32 filter_mask)
-{
-	struct switchdev_vlan_dump dump = {
-		.vlan.obj.orig_dev = dev,
-		.vlan.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
-		.skb = skb,
-		.filter_mask = filter_mask,
-	};
-	int err = 0;
-
-	if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
-	    (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
-		err = switchdev_port_obj_dump(dev, &dump.vlan.obj,
-					      switchdev_port_vlan_dump_cb);
-		if (err)
-			goto err_out;
-		if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
-			/* last one */
-			err = switchdev_port_vlan_dump_put(&dump);
-	}
-
-err_out:
-	return err == -EOPNOTSUPP ? 0 : err;
-}
-
-/**
- *	switchdev_port_bridge_getlink - Get bridge port attributes
- *
- *	@dev: port device
- *
- *	Called for SELF on rtnl_bridge_getlink to get bridge port
- *	attributes.
- */
-int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
-				  struct net_device *dev, u32 filter_mask,
-				  int nlflags)
-{
-	struct switchdev_attr attr = {
-		.orig_dev = dev,
-		.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
-	};
-	u16 mode = BRIDGE_MODE_UNDEF;
-	u32 mask = BR_LEARNING | BR_LEARNING_SYNC | BR_FLOOD;
-	int err;
-
-	if (!netif_is_bridge_port(dev))
-		return -EOPNOTSUPP;
-
-	err = switchdev_port_attr_get(dev, &attr);
-	if (err && err != -EOPNOTSUPP)
-		return err;
-
-	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode,
-				       attr.u.brport_flags, mask, nlflags,
-				       filter_mask, switchdev_port_vlan_fill);
-}
-EXPORT_SYMBOL_GPL(switchdev_port_bridge_getlink);
-
-static int switchdev_port_br_setflag(struct net_device *dev,
-				     struct nlattr *nlattr,
-				     unsigned long brport_flag)
-{
-	struct switchdev_attr attr = {
-		.orig_dev = dev,
-		.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
-	};
-	u8 flag = nla_get_u8(nlattr);
-	int err;
-
-	err = switchdev_port_attr_get(dev, &attr);
-	if (err)
-		return err;
-
-	if (flag)
-		attr.u.brport_flags |= brport_flag;
-	else
-		attr.u.brport_flags &= ~brport_flag;
-
-	return switchdev_port_attr_set(dev, &attr);
-}
-
-static const struct nla_policy
-switchdev_port_bridge_policy[IFLA_BRPORT_MAX + 1] = {
-	[IFLA_BRPORT_STATE]		= { .type = NLA_U8 },
-	[IFLA_BRPORT_COST]		= { .type = NLA_U32 },
-	[IFLA_BRPORT_PRIORITY]		= { .type = NLA_U16 },
-	[IFLA_BRPORT_MODE]		= { .type = NLA_U8 },
-	[IFLA_BRPORT_GUARD]		= { .type = NLA_U8 },
-	[IFLA_BRPORT_PROTECT]		= { .type = NLA_U8 },
-	[IFLA_BRPORT_FAST_LEAVE]	= { .type = NLA_U8 },
-	[IFLA_BRPORT_LEARNING]		= { .type = NLA_U8 },
-	[IFLA_BRPORT_LEARNING_SYNC]	= { .type = NLA_U8 },
-	[IFLA_BRPORT_UNICAST_FLOOD]	= { .type = NLA_U8 },
-};
-
-static int switchdev_port_br_setlink_protinfo(struct net_device *dev,
-					      struct nlattr *protinfo)
-{
-	struct nlattr *attr;
-	int rem;
-	int err;
-
-	err = nla_validate_nested(protinfo, IFLA_BRPORT_MAX,
-				  switchdev_port_bridge_policy, NULL);
-	if (err)
-		return err;
-
-	nla_for_each_nested(attr, protinfo, rem) {
-		switch (nla_type(attr)) {
-		case IFLA_BRPORT_LEARNING:
-			err = switchdev_port_br_setflag(dev, attr,
-							BR_LEARNING);
-			break;
-		case IFLA_BRPORT_LEARNING_SYNC:
-			err = switchdev_port_br_setflag(dev, attr,
-							BR_LEARNING_SYNC);
-			break;
-		case IFLA_BRPORT_UNICAST_FLOOD:
-			err = switchdev_port_br_setflag(dev, attr, BR_FLOOD);
-			break;
-		default:
-			err = -EOPNOTSUPP;
-			break;
-		}
-		if (err)
-			return err;
-	}
-
-	return 0;
-}
-
-static int switchdev_port_br_afspec(struct net_device *dev,
-				    struct nlattr *afspec,
-				    int (*f)(struct net_device *dev,
-					     const struct switchdev_obj *obj))
-{
-	struct nlattr *attr;
-	struct bridge_vlan_info *vinfo;
-	struct switchdev_obj_port_vlan vlan = {
-		.obj.orig_dev = dev,
-		.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
-	};
-	int rem;
-	int err;
-
-	nla_for_each_nested(attr, afspec, rem) {
-		if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
-			continue;
-		if (nla_len(attr) != sizeof(struct bridge_vlan_info))
-			return -EINVAL;
-		vinfo = nla_data(attr);
-		if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
-			return -EINVAL;
-		vlan.flags = vinfo->flags;
-		if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
-			if (vlan.vid_begin)
-				return -EINVAL;
-			vlan.vid_begin = vinfo->vid;
-			/* don't allow range of pvids */
-			if (vlan.flags & BRIDGE_VLAN_INFO_PVID)
-				return -EINVAL;
-		} else if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END) {
-			if (!vlan.vid_begin)
-				return -EINVAL;
-			vlan.vid_end = vinfo->vid;
-			if (vlan.vid_end <= vlan.vid_begin)
-				return -EINVAL;
-			err = f(dev, &vlan.obj);
-			if (err)
-				return err;
-			vlan.vid_begin = 0;
-		} else {
-			if (vlan.vid_begin)
-				return -EINVAL;
-			vlan.vid_begin = vinfo->vid;
-			vlan.vid_end = vinfo->vid;
-			err = f(dev, &vlan.obj);
-			if (err)
-				return err;
-			vlan.vid_begin = 0;
-		}
-	}
-
-	return 0;
-}
-
-/**
- *	switchdev_port_bridge_setlink - Set bridge port attributes
- *
- *	@dev: port device
- *	@nlh: netlink header
- *	@flags: netlink flags
- *
- *	Called for SELF on rtnl_bridge_setlink to set bridge port
- *	attributes.
- */
-int switchdev_port_bridge_setlink(struct net_device *dev,
-				  struct nlmsghdr *nlh, u16 flags)
-{
-	struct nlattr *protinfo;
-	struct nlattr *afspec;
-	int err = 0;
-
-	if (!netif_is_bridge_port(dev))
-		return -EOPNOTSUPP;
-
-	protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg),
-				   IFLA_PROTINFO);
-	if (protinfo) {
-		err = switchdev_port_br_setlink_protinfo(dev, protinfo);
-		if (err)
-			return err;
-	}
-
-	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg),
-				 IFLA_AF_SPEC);
-	if (afspec)
-		err = switchdev_port_br_afspec(dev, afspec,
-					       switchdev_port_obj_add);
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(switchdev_port_bridge_setlink);
-
-/**
- *	switchdev_port_bridge_dellink - Set bridge port attributes
- *
- *	@dev: port device
- *	@nlh: netlink header
- *	@flags: netlink flags
- *
- *	Called for SELF on rtnl_bridge_dellink to set bridge port
- *	attributes.
- */
-int switchdev_port_bridge_dellink(struct net_device *dev,
-				  struct nlmsghdr *nlh, u16 flags)
-{
-	struct nlattr *afspec;
-
-	if (!netif_is_bridge_port(dev))
-		return -EOPNOTSUPP;
-
-	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg),
-				 IFLA_AF_SPEC);
-	if (afspec)
-		return switchdev_port_br_afspec(dev, afspec,
-						switchdev_port_obj_del);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(switchdev_port_bridge_dellink);
-
-/**
- *	switchdev_port_fdb_add - Add FDB (MAC/VLAN) entry to port
- *
- *	@ndmsg: netlink hdr
- *	@nlattr: netlink attributes
- *	@dev: port device
- *	@addr: MAC address to add
- *	@vid: VLAN to add
- *
- *	Add FDB entry to switch device.
- */
-int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
-			   struct net_device *dev, const unsigned char *addr,
-			   u16 vid, u16 nlm_flags)
-{
-	struct switchdev_obj_port_fdb fdb = {
-		.obj.orig_dev = dev,
-		.obj.id = SWITCHDEV_OBJ_ID_PORT_FDB,
-		.vid = vid,
-	};
-
-	ether_addr_copy(fdb.addr, addr);
-	return switchdev_port_obj_add(dev, &fdb.obj);
-}
-EXPORT_SYMBOL_GPL(switchdev_port_fdb_add);
-
-/**
- *	switchdev_port_fdb_del - Delete FDB (MAC/VLAN) entry from port
- *
- *	@ndmsg: netlink hdr
- *	@nlattr: netlink attributes
- *	@dev: port device
- *	@addr: MAC address to delete
- *	@vid: VLAN to delete
- *
- *	Delete FDB entry from switch device.
- */
-int switchdev_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
-			   struct net_device *dev, const unsigned char *addr,
-			   u16 vid)
-{
-	struct switchdev_obj_port_fdb fdb = {
-		.obj.orig_dev = dev,
-		.obj.id = SWITCHDEV_OBJ_ID_PORT_FDB,
-		.vid = vid,
-	};
-
-	ether_addr_copy(fdb.addr, addr);
-	return switchdev_port_obj_del(dev, &fdb.obj);
-}
-EXPORT_SYMBOL_GPL(switchdev_port_fdb_del);
-
 bool switchdev_port_same_parent_id(struct net_device *a,
 				   struct net_device *b)
 {