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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: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2016-09-26 12:52:33 +02:00 committed by David S. Miller
parent 936bd48656
commit 347e3b28c1
6 changed files with 1 additions and 341 deletions
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2
include/net/ip_fib.h
View File

@ -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);

40
include/net/switchdev.h
View File

@ -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,

13
net/ipv4/fib_frontend.c
View File

@ -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.

2
net/ipv4/fib_rules.c
View File

@ -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;

104
net/ipv4/fib_trie.c
View File

@ -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 @@ out:
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,

181
net/switchdev/switchdev.c
View File

@ -21,7 +21,6 @@
#include <linux/workqueue.h>
#include <linux/if_vlan.h>
#include <linux/rtnetlink.h>
#include <net/ip_fib.h>
#include <net/switchdev.h>
/**
@ -344,8 +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_IPV4_FIB:
return sizeof(struct switchdev_obj_ipv4_fib);
case SWITCHDEV_OBJ_ID_PORT_FDB:
return sizeof(struct switchdev_obj_port_fdb);
case SWITCHDEV_OBJ_ID_PORT_MDB:
@ -1108,184 +1105,6 @@ int switchdev_port_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
}
EXPORT_SYMBOL_GPL(switchdev_port_fdb_dump);
static struct net_device *switchdev_get_lowest_dev(struct net_device *dev)
{
const struct switchdev_ops *ops = dev->switchdev_ops;
struct net_device *lower_dev;
struct net_device *port_dev;
struct list_head *iter;
/* Recusively search down until we find a sw port dev.
* (A sw port dev supports switchdev_port_attr_get).
*/
if (ops && ops->switchdev_port_attr_get)
return dev;
netdev_for_each_lower_dev(dev, lower_dev, iter) {
port_dev = switchdev_get_lowest_dev(lower_dev);
if (port_dev)
return port_dev;
}
return NULL;
}
static struct net_device *switchdev_get_dev_by_nhs(struct fib_info *fi)
{
struct switchdev_attr attr = {
.id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
};
struct switchdev_attr prev_attr;
struct net_device *dev = NULL;
int nhsel;
ASSERT_RTNL();
/* For this route, all nexthop devs must be on the same switch. */
for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) {
const struct fib_nh *nh = &fi->fib_nh[nhsel];
if (!nh->nh_dev)
return NULL;
dev = switchdev_get_lowest_dev(nh->nh_dev);
if (!dev)
return NULL;
attr.orig_dev = dev;
if (switchdev_port_attr_get(dev, &attr))
return NULL;
if (nhsel > 0 &&
!netdev_phys_item_id_same(&prev_attr.u.ppid, &attr.u.ppid))
return NULL;
prev_attr = attr;
}
return dev;
}
/**
* switchdev_fib_ipv4_add - Add/modify switch IPv4 route entry
*
* @dst: route's IPv4 destination address
* @dst_len: destination address length (prefix length)
* @fi: route FIB info structure
* @tos: route TOS
* @type: route type
* @nlflags: netlink flags passed in (NLM_F_*)
* @tb_id: route table ID
*
* Add/modify switch IPv4 route entry.
*/
int switchdev_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
u8 tos, u8 type, u32 nlflags, u32 tb_id)
{
struct switchdev_obj_ipv4_fib ipv4_fib = {
.obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB,
.dst = dst,
.dst_len = dst_len,
.fi = fi,
.tos = tos,
.type = type,
.nlflags = nlflags,
.tb_id = tb_id,
};
struct net_device *dev;
int err = 0;
/* Don't offload route if using custom ip rules or if
* IPv4 FIB offloading has been disabled completely.
*/
#ifdef CONFIG_IP_MULTIPLE_TABLES
if (fi->fib_net->ipv4.fib_has_custom_rules)
return 0;
#endif
if (fi->fib_net->ipv4.fib_offload_disabled)
return 0;
dev = switchdev_get_dev_by_nhs(fi);
if (!dev)
return 0;
ipv4_fib.obj.orig_dev = dev;
err = switchdev_port_obj_add(dev, &ipv4_fib.obj);
if (!err)
fib_info_offload_inc(fi);
return err == -EOPNOTSUPP ? 0 : err;
}
EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_add);
/**
* switchdev_fib_ipv4_del - Delete IPv4 route entry from switch
*
* @dst: route's IPv4 destination address
* @dst_len: destination address length (prefix length)
* @fi: route FIB info structure
* @tos: route TOS
* @type: route type
* @tb_id: route table ID
*
* Delete IPv4 route entry from switch device.
*/
int switchdev_fib_ipv4_del(u32 dst, int dst_len, struct fib_info *fi,
u8 tos, u8 type, u32 tb_id)
{
struct switchdev_obj_ipv4_fib ipv4_fib = {
.obj.id = SWITCHDEV_OBJ_ID_IPV4_FIB,
.dst = dst,
.dst_len = dst_len,
.fi = fi,
.tos = tos,
.type = type,
.nlflags = 0,
.tb_id = tb_id,
};
struct net_device *dev;
int err = 0;
if (!(fi->fib_flags & RTNH_F_OFFLOAD))
return 0;
dev = switchdev_get_dev_by_nhs(fi);
if (!dev)
return 0;
ipv4_fib.obj.orig_dev = dev;
err = switchdev_port_obj_del(dev, &ipv4_fib.obj);
if (!err)
fib_info_offload_dec(fi);
return err == -EOPNOTSUPP ? 0 : err;
}
EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_del);
/**
* switchdev_fib_ipv4_abort - Abort an IPv4 FIB operation
*
* @fi: route FIB info structure
*/
void switchdev_fib_ipv4_abort(struct fib_info *fi)
{
/* There was a problem installing this route to the offload
* device. For now, until we come up with more refined
* policy handling, abruptly end IPv4 fib offloading for
* for entire net by flushing offload device(s) of all
* IPv4 routes, and mark IPv4 fib offloading broken from
* this point forward.
*/
fib_flush_external(fi->fib_net);
fi->fib_net->ipv4.fib_offload_disabled = true;
}
EXPORT_SYMBOL_GPL(switchdev_fib_ipv4_abort);
bool switchdev_port_same_parent_id(struct net_device *a,
struct net_device *b)
{