From 347e3b28c1ba24c1ae2f30290d8247480ab9ce14 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Mon, 26 Sep 2016 12:52:33 +0200 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- include/net/ip_fib.h | 2 - include/net/switchdev.h | 40 --------- net/ipv4/fib_frontend.c | 13 --- net/ipv4/fib_rules.c | 2 - net/ipv4/fib_trie.c | 104 +--------------------- net/switchdev/switchdev.c | 181 -------------------------------------- 6 files changed, 1 insertion(+), 341 deletions(-) diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h index ffccf1787914..b9314b48e39f 100644 --- a/include/net/ip_fib.h +++ b/include/net/ip_fib.h @@ -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); diff --git a/include/net/switchdev.h b/include/net/switchdev.h index 729fe1534160..eba80c4fc56f 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -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, diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 86c43dc9a60e..c3b80478226e 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -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. diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c index ebadf6b99499..2e50062f642d 100644 --- a/net/ipv4/fib_rules.c +++ b/net/ipv4/fib_rules.c @@ -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; diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 51a4537eb145..31cef3602585 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -81,7 +81,6 @@ #include #include #include -#include #include #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, diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index abd8d2a38a7d..02beb35f577f 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -21,7 +21,6 @@ #include #include #include -#include #include /** @@ -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) { -- 2.20.1