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Merge branch 'ct-offload' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux

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This commit is contained in:
David S. Miller
2020-03-12 12:34:23 -07:00
parent 93e616131a b8ce903709
commit bf3347c4d1
23 changed files with 1628 additions and 254 deletions
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98
net/sched/cls_api.c
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@@ -22,6 +22,7 @@
#include <linux/idr.h>
#include <linux/rhashtable.h>
#include <linux/jhash.h>
#include <linux/rculist.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/netlink.h>
@@ -354,7 +355,7 @@ static struct tcf_chain *tcf_chain_create(struct tcf_block *block,
chain = kzalloc(sizeof(*chain), GFP_KERNEL);
if (!chain)
return NULL;
list_add_tail(&chain->list, &block->chain_list);
list_add_tail_rcu(&chain->list, &block->chain_list);
mutex_init(&chain->filter_chain_lock);
chain->block = block;
chain->index = chain_index;
@@ -394,7 +395,7 @@ static bool tcf_chain_detach(struct tcf_chain *chain)
ASSERT_BLOCK_LOCKED(block);
list_del(&chain->list);
list_del_rcu(&chain->list);
if (!chain->index)
block->chain0.chain = NULL;
@@ -453,6 +454,20 @@ static struct tcf_chain *tcf_chain_lookup(struct tcf_block *block,
return NULL;
}
#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
static struct tcf_chain *tcf_chain_lookup_rcu(const struct tcf_block *block,
u32 chain_index)
{
struct tcf_chain *chain;
list_for_each_entry_rcu(chain, &block->chain_list, list) {
if (chain->index == chain_index)
return chain;
}
return NULL;
}
#endif
static int tc_chain_notify(struct tcf_chain *chain, struct sk_buff *oskb,
u32 seq, u16 flags, int event, bool unicast);
@@ -1559,12 +1574,15 @@ static int tcf_block_setup(struct tcf_block *block,
* to this qdisc, (optionally) tests for protocol and asks
* specific classifiers.
*/
int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res, bool compat_mode)
static inline int __tcf_classify(struct sk_buff *skb,
const struct tcf_proto *tp,
const struct tcf_proto *orig_tp,
struct tcf_result *res,
bool compat_mode,
u32 *last_executed_chain)
{
#ifdef CONFIG_NET_CLS_ACT
const int max_reclassify_loop = 4;
const struct tcf_proto *orig_tp = tp;
const struct tcf_proto *first_tp;
int limit = 0;
@@ -1582,21 +1600,11 @@ reclassify:
#ifdef CONFIG_NET_CLS_ACT
if (unlikely(err == TC_ACT_RECLASSIFY && !compat_mode)) {
first_tp = orig_tp;
*last_executed_chain = first_tp->chain->index;
goto reset;
} else if (unlikely(TC_ACT_EXT_CMP(err, TC_ACT_GOTO_CHAIN))) {
first_tp = res->goto_tp;
#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
{
struct tc_skb_ext *ext;
ext = skb_ext_add(skb, TC_SKB_EXT);
if (WARN_ON_ONCE(!ext))
return TC_ACT_SHOT;
ext->chain = err & TC_ACT_EXT_VAL_MASK;
}
#endif
*last_executed_chain = err & TC_ACT_EXT_VAL_MASK;
goto reset;
}
#endif
@@ -1619,8 +1627,64 @@ reset:
goto reclassify;
#endif
}
int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res, bool compat_mode)
{
u32 last_executed_chain = 0;
return __tcf_classify(skb, tp, tp, res, compat_mode,
&last_executed_chain);
}
EXPORT_SYMBOL(tcf_classify);
int tcf_classify_ingress(struct sk_buff *skb,
const struct tcf_block *ingress_block,
const struct tcf_proto *tp,
struct tcf_result *res, bool compat_mode)
{
#if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
u32 last_executed_chain = 0;
return __tcf_classify(skb, tp, tp, res, compat_mode,
&last_executed_chain);
#else
u32 last_executed_chain = tp ? tp->chain->index : 0;
const struct tcf_proto *orig_tp = tp;
struct tc_skb_ext *ext;
int ret;
ext = skb_ext_find(skb, TC_SKB_EXT);
if (ext && ext->chain) {
struct tcf_chain *fchain;
fchain = tcf_chain_lookup_rcu(ingress_block, ext->chain);
if (!fchain)
return TC_ACT_SHOT;
/* Consume, so cloned/redirect skbs won't inherit ext */
skb_ext_del(skb, TC_SKB_EXT);
tp = rcu_dereference_bh(fchain->filter_chain);
}
ret = __tcf_classify(skb, tp, orig_tp, res, compat_mode,
&last_executed_chain);
/* If we missed on some chain */
if (ret == TC_ACT_UNSPEC && last_executed_chain) {
ext = skb_ext_add(skb, TC_SKB_EXT);
if (WARN_ON_ONCE(!ext))
return TC_ACT_SHOT;
ext->chain = last_executed_chain;
}
return ret;
#endif
}
EXPORT_SYMBOL(tcf_classify_ingress);
struct tcf_chain_info {
struct tcf_proto __rcu **pprev;
struct tcf_proto __rcu *next;