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Commit 347e3b28 authored by Jiri Pirko's avatar Jiri Pirko Committed by David S. Miller
Browse files

switchdev: remove FIB offload infrastructure 



Since this is now taken care of by FIB notifier, remove the code, with
all unused dependencies.

Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 936bd486

include/net/ip_fib.h

+0 −2
Original line number Diff line number Diff line
@@ -243,7 +243,6 @@ int fib_table_dump(struct fib_table *table, struct sk_buff *skb, 
		   struct netlink_callback *cb);

int fib_table_flush(struct net *net, struct fib_table *table);

struct fib_table *fib_trie_unmerge(struct fib_table *main_tb);

void fib_table_flush_external(struct fib_table *table);

void fib_free_table(struct fib_table *tb);



#ifndef CONFIG_IP_MULTIPLE_TABLES
@@ -356,7 +355,6 @@ static inline int fib_num_tclassid_users(struct net *net) 
}

#endif

int fib_unmerge(struct net *net);

void fib_flush_external(struct net *net);



/* Exported by fib_semantics.c */

int ip_fib_check_default(__be32 gw, struct net_device *dev);

include/net/switchdev.h

+0 −40
Original line number Diff line number Diff line
@@ -68,7 +68,6 @@ struct switchdev_attr { 
enum switchdev_obj_id {

	SWITCHDEV_OBJ_ID_UNDEFINED,

	SWITCHDEV_OBJ_ID_PORT_VLAN,

	SWITCHDEV_OBJ_ID_IPV4_FIB,

	SWITCHDEV_OBJ_ID_PORT_FDB,

	SWITCHDEV_OBJ_ID_PORT_MDB,

};
@@ -92,21 +91,6 @@ struct switchdev_obj_port_vlan { 
#define SWITCHDEV_OBJ_PORT_VLAN(obj) \

	container_of(obj, struct switchdev_obj_port_vlan, obj)



/* SWITCHDEV_OBJ_ID_IPV4_FIB */

struct switchdev_obj_ipv4_fib {

	struct switchdev_obj obj;

	u32 dst;

	int dst_len;

	struct fib_info *fi;

	u8 tos;

	u8 type;

	u32 nlflags;

	u32 tb_id;

};



#define SWITCHDEV_OBJ_IPV4_FIB(obj) \

	container_of(obj, struct switchdev_obj_ipv4_fib, obj)



/* SWITCHDEV_OBJ_ID_PORT_FDB */

struct switchdev_obj_port_fdb {

	struct switchdev_obj obj;
@@ -209,11 +193,6 @@ 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_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,

			   u8 tos, u8 type, u32 nlflags, u32 tb_id);

int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,

			   u8 tos, u8 type, u32 tb_id);

void switchdev_fib_ipv4_abort(struct fib_info *fi);

int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],

			   struct net_device *dev, const unsigned char *addr,

			   u16 vid, u16 nlm_flags);
@@ -304,25 +283,6 @@ static inline int switchdev_port_bridge_dellink(struct net_device *dev, 
	return -EOPNOTSUPP;

}



static inline int switchdev_fib_ipv4_add(u32 dst, int dst_len,

					 struct fib_info *fi,

					 u8 tos, u8 type,

					 u32 nlflags, u32 tb_id)

{

	return 0;

}



static inline int switchdev_fib_ipv4_del(u32 dst, int dst_len,

					 struct fib_info *fi,

					 u8 tos, u8 type, u32 tb_id)

{

	return 0;

}



static inline void switchdev_fib_ipv4_abort(struct fib_info *fi)

{

}



static inline int switchdev_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],

					 struct net_device *dev,

					 const unsigned char *addr,

net/ipv4/fib_frontend.c

+0 −13
Original line number Diff line number Diff line
@@ -189,19 +189,6 @@ static void fib_flush(struct net *net) 
		rt_cache_flush(net);

}



void fib_flush_external(struct net *net)

{

	struct fib_table *tb;

	struct hlist_head *head;

	unsigned int h;



	for (h = 0; h < FIB_TABLE_HASHSZ; h++) {

		head = &net->ipv4.fib_table_hash[h];

		hlist_for_each_entry(tb, head, tb_hlist)

			fib_table_flush_external(tb);

	}

}



/*

 * Find address type as if only "dev" was present in the system. If

 * on_dev is NULL then all interfaces are taken into consideration.

net/ipv4/fib_rules.c

+0 −2
Original line number Diff line number Diff line
@@ -228,7 +228,6 @@ static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb, 
	rule4->tos = frh->tos;



	net->ipv4.fib_has_custom_rules = true;

	fib_flush_external(rule->fr_net);

	call_fib_rule_notifiers(net, FIB_EVENT_RULE_ADD);



	err = 0;
@@ -251,7 +250,6 @@ static int fib4_rule_delete(struct fib_rule *rule) 
		net->ipv4.fib_num_tclassid_users--;

#endif

	net->ipv4.fib_has_custom_rules = true;

	fib_flush_external(rule->fr_net);

	call_fib_rule_notifiers(net, FIB_EVENT_RULE_DEL);

errout:

	return err;

net/ipv4/fib_trie.c

+1 −103
Original line number Diff line number Diff line
@@ -81,7 +81,6 @@ 
#include <net/tcp.h>

#include <net/sock.h>

#include <net/ip_fib.h>

#include <net/switchdev.h>

#include <trace/events/fib.h>

#include "fib_lookup.h"
@@ -1215,17 +1214,6 @@ int fib_table_insert(struct net *net, struct fib_table *tb, 
			new_fa->tb_id = tb->tb_id;

			new_fa->fa_default = -1;



			err = switchdev_fib_ipv4_add(key, plen, fi,

						     new_fa->fa_tos,

						     cfg->fc_type,

						     cfg->fc_nlflags,

						     tb->tb_id);

			if (err) {

				switchdev_fib_ipv4_abort(fi);

				kmem_cache_free(fn_alias_kmem, new_fa);

				goto out;

			}



			hlist_replace_rcu(&fa->fa_list, &new_fa->fa_list);



			alias_free_mem_rcu(fa);
@@ -1273,18 +1261,10 @@ int fib_table_insert(struct net *net, struct fib_table *tb, 
	new_fa->tb_id = tb->tb_id;

	new_fa->fa_default = -1;



	/* (Optionally) offload fib entry to switch hardware. */

	err = switchdev_fib_ipv4_add(key, plen, fi, tos, cfg->fc_type,

				     cfg->fc_nlflags, tb->tb_id);

	if (err) {

		switchdev_fib_ipv4_abort(fi);

		goto out_free_new_fa;

	}



	/* Insert new entry to the list. */

	err = fib_insert_alias(t, tp, l, new_fa, fa, key);

	if (err)

		goto out_sw_fib_del;

		goto out_free_new_fa;



	if (!plen)

		tb->tb_num_default++;
@@ -1297,8 +1277,6 @@ int fib_table_insert(struct net *net, struct fib_table *tb, 
succeeded:

	return 0;



out_sw_fib_del:

	switchdev_fib_ipv4_del(key, plen, fi, tos, cfg->fc_type, tb->tb_id);

out_free_new_fa:

	kmem_cache_free(fn_alias_kmem, new_fa);

out:
@@ -1591,9 +1569,6 @@ int fib_table_delete(struct net *net, struct fib_table *tb, 
	if (!fa_to_delete)

		return -ESRCH;



	switchdev_fib_ipv4_del(key, plen, fa_to_delete->fa_info, tos,

			       cfg->fc_type, tb->tb_id);



	call_fib_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, key, plen,

				 fa_to_delete->fa_info, tos, cfg->fc_type,

				 tb->tb_id, 0);
@@ -1785,80 +1760,6 @@ struct fib_table *fib_trie_unmerge(struct fib_table *oldtb) 
	return NULL;

}



/* Caller must hold RTNL */

void fib_table_flush_external(struct fib_table *tb)

{

	struct trie *t = (struct trie *)tb->tb_data;

	struct key_vector *pn = t->kv;

	unsigned long cindex = 1;

	struct hlist_node *tmp;

	struct fib_alias *fa;



	/* walk trie in reverse order */

	for (;;) {

		unsigned char slen = 0;

		struct key_vector *n;



		if (!(cindex--)) {

			t_key pkey = pn->key;



			/* cannot resize the trie vector */

			if (IS_TRIE(pn))

				break;



			/* resize completed node */

			pn = resize(t, pn);

			cindex = get_index(pkey, pn);



			continue;

		}



		/* grab the next available node */

		n = get_child(pn, cindex);

		if (!n)

			continue;



		if (IS_TNODE(n)) {

			/* record pn and cindex for leaf walking */

			pn = n;

			cindex = 1ul << n->bits;



			continue;

		}



		hlist_for_each_entry_safe(fa, tmp, &n->leaf, fa_list) {

			struct fib_info *fi = fa->fa_info;



			/* if alias was cloned to local then we just

			 * need to remove the local copy from main

			 */

			if (tb->tb_id != fa->tb_id) {

				hlist_del_rcu(&fa->fa_list);

				alias_free_mem_rcu(fa);

				continue;

			}



			/* record local slen */

			slen = fa->fa_slen;



			if (!fi || !(fi->fib_flags & RTNH_F_OFFLOAD))

				continue;



			switchdev_fib_ipv4_del(n->key, KEYLENGTH - fa->fa_slen,

					       fi, fa->fa_tos, fa->fa_type,

					       tb->tb_id);

		}



		/* update leaf slen */

		n->slen = slen;



		if (hlist_empty(&n->leaf)) {

			put_child_root(pn, n->key, NULL);

			node_free(n);

		}

	}

}



/* Caller must hold RTNL. */

int fib_table_flush(struct net *net, struct fib_table *tb)

{
@@ -1909,9 +1810,6 @@ int fib_table_flush(struct net *net, struct fib_table *tb) 
				continue;

			}



			switchdev_fib_ipv4_del(n->key, KEYLENGTH - fa->fa_slen,

					       fi, fa->fa_tos, fa->fa_type,

					       tb->tb_id);

			call_fib_entry_notifiers(net, FIB_EVENT_ENTRY_DEL,

						 n->key,

						 KEYLENGTH - fa->fa_slen,