Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 624 insertions, 0 deletions

diff --git a/net/core/flow_offload.c b/net/core/flow_offload.c
new file mode 100644
index 000000000..abe423fd5
--- /dev/null
+++ b/net/core/flow_offload.c
@@ -0,0 +1,624 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <net/act_api.h>
+#include <net/flow_offload.h>
+#include <linux/rtnetlink.h>
+#include <linux/mutex.h>
+#include <linux/rhashtable.h>
+
+struct flow_rule *flow_rule_alloc(unsigned int num_actions)
+{
+	struct flow_rule *rule;
+	int i;
+
+	rule = kzalloc(struct_size(rule, action.entries, num_actions),
+		       GFP_KERNEL);
+	if (!rule)
+		return NULL;
+
+	rule->action.num_entries = num_actions;
+	/* Pre-fill each action hw_stats with DONT_CARE.
+	 * Caller can override this if it wants stats for a given action.
+	 */
+	for (i = 0; i < num_actions; i++)
+		rule->action.entries[i].hw_stats = FLOW_ACTION_HW_STATS_DONT_CARE;
+
+	return rule;
+}
+EXPORT_SYMBOL(flow_rule_alloc);
+
+struct flow_offload_action *offload_action_alloc(unsigned int num_actions)
+{
+	struct flow_offload_action *fl_action;
+	int i;
+
+	fl_action = kzalloc(struct_size(fl_action, action.entries, num_actions),
+			    GFP_KERNEL);
+	if (!fl_action)
+		return NULL;
+
+	fl_action->action.num_entries = num_actions;
+	/* Pre-fill each action hw_stats with DONT_CARE.
+	 * Caller can override this if it wants stats for a given action.
+	 */
+	for (i = 0; i < num_actions; i++)
+		fl_action->action.entries[i].hw_stats = FLOW_ACTION_HW_STATS_DONT_CARE;
+
+	return fl_action;
+}
+
+#define FLOW_DISSECTOR_MATCH(__rule, __type, __out)				\
+	const struct flow_match *__m = &(__rule)->match;			\
+	struct flow_dissector *__d = (__m)->dissector;				\
+										\
+	(__out)->key = skb_flow_dissector_target(__d, __type, (__m)->key);	\
+	(__out)->mask = skb_flow_dissector_target(__d, __type, (__m)->mask);	\
+
+void flow_rule_match_meta(const struct flow_rule *rule,
+			  struct flow_match_meta *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_META, out);
+}
+EXPORT_SYMBOL(flow_rule_match_meta);
+
+void flow_rule_match_basic(const struct flow_rule *rule,
+			   struct flow_match_basic *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_BASIC, out);
+}
+EXPORT_SYMBOL(flow_rule_match_basic);
+
+void flow_rule_match_control(const struct flow_rule *rule,
+			     struct flow_match_control *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_CONTROL, out);
+}
+EXPORT_SYMBOL(flow_rule_match_control);
+
+void flow_rule_match_eth_addrs(const struct flow_rule *rule,
+			       struct flow_match_eth_addrs *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS, out);
+}
+EXPORT_SYMBOL(flow_rule_match_eth_addrs);
+
+void flow_rule_match_vlan(const struct flow_rule *rule,
+			  struct flow_match_vlan *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_VLAN, out);
+}
+EXPORT_SYMBOL(flow_rule_match_vlan);
+
+void flow_rule_match_cvlan(const struct flow_rule *rule,
+			   struct flow_match_vlan *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_CVLAN, out);
+}
+EXPORT_SYMBOL(flow_rule_match_cvlan);
+
+void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
+				struct flow_match_ipv4_addrs *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS, out);
+}
+EXPORT_SYMBOL(flow_rule_match_ipv4_addrs);
+
+void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
+				struct flow_match_ipv6_addrs *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS, out);
+}
+EXPORT_SYMBOL(flow_rule_match_ipv6_addrs);
+
+void flow_rule_match_ip(const struct flow_rule *rule,
+			struct flow_match_ip *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_IP, out);
+}
+EXPORT_SYMBOL(flow_rule_match_ip);
+
+void flow_rule_match_ports(const struct flow_rule *rule,
+			   struct flow_match_ports *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_PORTS, out);
+}
+EXPORT_SYMBOL(flow_rule_match_ports);
+
+void flow_rule_match_ports_range(const struct flow_rule *rule,
+				 struct flow_match_ports_range *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_PORTS_RANGE, out);
+}
+EXPORT_SYMBOL(flow_rule_match_ports_range);
+
+void flow_rule_match_tcp(const struct flow_rule *rule,
+			 struct flow_match_tcp *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_TCP, out);
+}
+EXPORT_SYMBOL(flow_rule_match_tcp);
+
+void flow_rule_match_icmp(const struct flow_rule *rule,
+			  struct flow_match_icmp *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ICMP, out);
+}
+EXPORT_SYMBOL(flow_rule_match_icmp);
+
+void flow_rule_match_mpls(const struct flow_rule *rule,
+			  struct flow_match_mpls *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_MPLS, out);
+}
+EXPORT_SYMBOL(flow_rule_match_mpls);
+
+void flow_rule_match_enc_control(const struct flow_rule *rule,
+				 struct flow_match_control *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_CONTROL, out);
+}
+EXPORT_SYMBOL(flow_rule_match_enc_control);
+
+void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
+				    struct flow_match_ipv4_addrs *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, out);
+}
+EXPORT_SYMBOL(flow_rule_match_enc_ipv4_addrs);
+
+void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
+				    struct flow_match_ipv6_addrs *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, out);
+}
+EXPORT_SYMBOL(flow_rule_match_enc_ipv6_addrs);
+
+void flow_rule_match_enc_ip(const struct flow_rule *rule,
+			    struct flow_match_ip *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_IP, out);
+}
+EXPORT_SYMBOL(flow_rule_match_enc_ip);
+
+void flow_rule_match_enc_ports(const struct flow_rule *rule,
+			       struct flow_match_ports *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_PORTS, out);
+}
+EXPORT_SYMBOL(flow_rule_match_enc_ports);
+
+void flow_rule_match_enc_keyid(const struct flow_rule *rule,
+			       struct flow_match_enc_keyid *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_KEYID, out);
+}
+EXPORT_SYMBOL(flow_rule_match_enc_keyid);
+
+void flow_rule_match_enc_opts(const struct flow_rule *rule,
+			      struct flow_match_enc_opts *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_OPTS, out);
+}
+EXPORT_SYMBOL(flow_rule_match_enc_opts);
+
+struct flow_action_cookie *flow_action_cookie_create(void *data,
+						     unsigned int len,
+						     gfp_t gfp)
+{
+	struct flow_action_cookie *cookie;
+
+	cookie = kmalloc(sizeof(*cookie) + len, gfp);
+	if (!cookie)
+		return NULL;
+	cookie->cookie_len = len;
+	memcpy(cookie->cookie, data, len);
+	return cookie;
+}
+EXPORT_SYMBOL(flow_action_cookie_create);
+
+void flow_action_cookie_destroy(struct flow_action_cookie *cookie)
+{
+	kfree(cookie);
+}
+EXPORT_SYMBOL(flow_action_cookie_destroy);
+
+void flow_rule_match_ct(const struct flow_rule *rule,
+			struct flow_match_ct *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_CT, out);
+}
+EXPORT_SYMBOL(flow_rule_match_ct);
+
+void flow_rule_match_pppoe(const struct flow_rule *rule,
+			   struct flow_match_pppoe *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_PPPOE, out);
+}
+EXPORT_SYMBOL(flow_rule_match_pppoe);
+
+void flow_rule_match_l2tpv3(const struct flow_rule *rule,
+			    struct flow_match_l2tpv3 *out)
+{
+	FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_L2TPV3, out);
+}
+EXPORT_SYMBOL(flow_rule_match_l2tpv3);
+
+struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
+					  void *cb_ident, void *cb_priv,
+					  void (*release)(void *cb_priv))
+{
+	struct flow_block_cb *block_cb;
+
+	block_cb = kzalloc(sizeof(*block_cb), GFP_KERNEL);
+	if (!block_cb)
+		return ERR_PTR(-ENOMEM);
+
+	block_cb->cb = cb;
+	block_cb->cb_ident = cb_ident;
+	block_cb->cb_priv = cb_priv;
+	block_cb->release = release;
+
+	return block_cb;
+}
+EXPORT_SYMBOL(flow_block_cb_alloc);
+
+void flow_block_cb_free(struct flow_block_cb *block_cb)
+{
+	if (block_cb->release)
+		block_cb->release(block_cb->cb_priv);
+
+	kfree(block_cb);
+}
+EXPORT_SYMBOL(flow_block_cb_free);
+
+struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
+					   flow_setup_cb_t *cb, void *cb_ident)
+{
+	struct flow_block_cb *block_cb;
+
+	list_for_each_entry(block_cb, &block->cb_list, list) {
+		if (block_cb->cb == cb &&
+		    block_cb->cb_ident == cb_ident)
+			return block_cb;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(flow_block_cb_lookup);
+
+void *flow_block_cb_priv(struct flow_block_cb *block_cb)
+{
+	return block_cb->cb_priv;
+}
+EXPORT_SYMBOL(flow_block_cb_priv);
+
+void flow_block_cb_incref(struct flow_block_cb *block_cb)
+{
+	block_cb->refcnt++;
+}
+EXPORT_SYMBOL(flow_block_cb_incref);
+
+unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb)
+{
+	return --block_cb->refcnt;
+}
+EXPORT_SYMBOL(flow_block_cb_decref);
+
+bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
+			   struct list_head *driver_block_list)
+{
+	struct flow_block_cb *block_cb;
+
+	list_for_each_entry(block_cb, driver_block_list, driver_list) {
+		if (block_cb->cb == cb &&
+		    block_cb->cb_ident == cb_ident)
+			return true;
+	}
+
+	return false;
+}
+EXPORT_SYMBOL(flow_block_cb_is_busy);
+
+int flow_block_cb_setup_simple(struct flow_block_offload *f,
+			       struct list_head *driver_block_list,
+			       flow_setup_cb_t *cb,
+			       void *cb_ident, void *cb_priv,
+			       bool ingress_only)
+{
+	struct flow_block_cb *block_cb;
+
+	if (ingress_only &&
+	    f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
+		return -EOPNOTSUPP;
+
+	f->driver_block_list = driver_block_list;
+
+	switch (f->command) {
+	case FLOW_BLOCK_BIND:
+		if (flow_block_cb_is_busy(cb, cb_ident, driver_block_list))
+			return -EBUSY;
+
+		block_cb = flow_block_cb_alloc(cb, cb_ident, cb_priv, NULL);
+		if (IS_ERR(block_cb))
+			return PTR_ERR(block_cb);
+
+		flow_block_cb_add(block_cb, f);
+		list_add_tail(&block_cb->driver_list, driver_block_list);
+		return 0;
+	case FLOW_BLOCK_UNBIND:
+		block_cb = flow_block_cb_lookup(f->block, cb, cb_ident);
+		if (!block_cb)
+			return -ENOENT;
+
+		flow_block_cb_remove(block_cb, f);
+		list_del(&block_cb->driver_list);
+		return 0;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+EXPORT_SYMBOL(flow_block_cb_setup_simple);
+
+static DEFINE_MUTEX(flow_indr_block_lock);
+static LIST_HEAD(flow_block_indr_list);
+static LIST_HEAD(flow_block_indr_dev_list);
+static LIST_HEAD(flow_indir_dev_list);
+
+struct flow_indr_dev {
+	struct list_head		list;
+	flow_indr_block_bind_cb_t	*cb;
+	void				*cb_priv;
+	refcount_t			refcnt;
+};
+
+static struct flow_indr_dev *flow_indr_dev_alloc(flow_indr_block_bind_cb_t *cb,
+						 void *cb_priv)
+{
+	struct flow_indr_dev *indr_dev;
+
+	indr_dev = kmalloc(sizeof(*indr_dev), GFP_KERNEL);
+	if (!indr_dev)
+		return NULL;
+
+	indr_dev->cb		= cb;
+	indr_dev->cb_priv	= cb_priv;
+	refcount_set(&indr_dev->refcnt, 1);
+
+	return indr_dev;
+}
+
+struct flow_indir_dev_info {
+	void *data;
+	struct net_device *dev;
+	struct Qdisc *sch;
+	enum tc_setup_type type;
+	void (*cleanup)(struct flow_block_cb *block_cb);
+	struct list_head list;
+	enum flow_block_command command;
+	enum flow_block_binder_type binder_type;
+	struct list_head *cb_list;
+};
+
+static void existing_qdiscs_register(flow_indr_block_bind_cb_t *cb, void *cb_priv)
+{
+	struct flow_block_offload bo;
+	struct flow_indir_dev_info *cur;
+
+	list_for_each_entry(cur, &flow_indir_dev_list, list) {
+		memset(&bo, 0, sizeof(bo));
+		bo.command = cur->command;
+		bo.binder_type = cur->binder_type;
+		INIT_LIST_HEAD(&bo.cb_list);
+		cb(cur->dev, cur->sch, cb_priv, cur->type, &bo, cur->data, cur->cleanup);
+		list_splice(&bo.cb_list, cur->cb_list);
+	}
+}
+
+int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv)
+{
+	struct flow_indr_dev *indr_dev;
+
+	mutex_lock(&flow_indr_block_lock);
+	list_for_each_entry(indr_dev, &flow_block_indr_dev_list, list) {
+		if (indr_dev->cb == cb &&
+		    indr_dev->cb_priv == cb_priv) {
+			refcount_inc(&indr_dev->refcnt);
+			mutex_unlock(&flow_indr_block_lock);
+			return 0;
+		}
+	}
+
+	indr_dev = flow_indr_dev_alloc(cb, cb_priv);
+	if (!indr_dev) {
+		mutex_unlock(&flow_indr_block_lock);
+		return -ENOMEM;
+	}
+
+	list_add(&indr_dev->list, &flow_block_indr_dev_list);
+	existing_qdiscs_register(cb, cb_priv);
+	mutex_unlock(&flow_indr_block_lock);
+
+	tcf_action_reoffload_cb(cb, cb_priv, true);
+
+	return 0;
+}
+EXPORT_SYMBOL(flow_indr_dev_register);
+
+static void __flow_block_indr_cleanup(void (*release)(void *cb_priv),
+				      void *cb_priv,
+				      struct list_head *cleanup_list)
+{
+	struct flow_block_cb *this, *next;
+
+	list_for_each_entry_safe(this, next, &flow_block_indr_list, indr.list) {
+		if (this->release == release &&
+		    this->indr.cb_priv == cb_priv)
+			list_move(&this->indr.list, cleanup_list);
+	}
+}
+
+static void flow_block_indr_notify(struct list_head *cleanup_list)
+{
+	struct flow_block_cb *this, *next;
+
+	list_for_each_entry_safe(this, next, cleanup_list, indr.list) {
+		list_del(&this->indr.list);
+		this->indr.cleanup(this);
+	}
+}
+
+void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
+			      void (*release)(void *cb_priv))
+{
+	struct flow_indr_dev *this, *next, *indr_dev = NULL;
+	LIST_HEAD(cleanup_list);
+
+	mutex_lock(&flow_indr_block_lock);
+	list_for_each_entry_safe(this, next, &flow_block_indr_dev_list, list) {
+		if (this->cb == cb &&
+		    this->cb_priv == cb_priv &&
+		    refcount_dec_and_test(&this->refcnt)) {
+			indr_dev = this;
+			list_del(&indr_dev->list);
+			break;
+		}
+	}
+
+	if (!indr_dev) {
+		mutex_unlock(&flow_indr_block_lock);
+		return;
+	}
+
+	__flow_block_indr_cleanup(release, cb_priv, &cleanup_list);
+	mutex_unlock(&flow_indr_block_lock);
+
+	tcf_action_reoffload_cb(cb, cb_priv, false);
+	flow_block_indr_notify(&cleanup_list);
+	kfree(indr_dev);
+}
+EXPORT_SYMBOL(flow_indr_dev_unregister);
+
+static void flow_block_indr_init(struct flow_block_cb *flow_block,
+				 struct flow_block_offload *bo,
+				 struct net_device *dev, struct Qdisc *sch, void *data,
+				 void *cb_priv,
+				 void (*cleanup)(struct flow_block_cb *block_cb))
+{
+	flow_block->indr.binder_type = bo->binder_type;
+	flow_block->indr.data = data;
+	flow_block->indr.cb_priv = cb_priv;
+	flow_block->indr.dev = dev;
+	flow_block->indr.sch = sch;
+	flow_block->indr.cleanup = cleanup;
+}
+
+struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
+					       void *cb_ident, void *cb_priv,
+					       void (*release)(void *cb_priv),
+					       struct flow_block_offload *bo,
+					       struct net_device *dev,
+					       struct Qdisc *sch, void *data,
+					       void *indr_cb_priv,
+					       void (*cleanup)(struct flow_block_cb *block_cb))
+{
+	struct flow_block_cb *block_cb;
+
+	block_cb = flow_block_cb_alloc(cb, cb_ident, cb_priv, release);
+	if (IS_ERR(block_cb))
+		goto out;
+
+	flow_block_indr_init(block_cb, bo, dev, sch, data, indr_cb_priv, cleanup);
+	list_add(&block_cb->indr.list, &flow_block_indr_list);
+
+out:
+	return block_cb;
+}
+EXPORT_SYMBOL(flow_indr_block_cb_alloc);
+
+static struct flow_indir_dev_info *find_indir_dev(void *data)
+{
+	struct flow_indir_dev_info *cur;
+
+	list_for_each_entry(cur, &flow_indir_dev_list, list) {
+		if (cur->data == data)
+			return cur;
+	}
+	return NULL;
+}
+
+static int indir_dev_add(void *data, struct net_device *dev, struct Qdisc *sch,
+			 enum tc_setup_type type, void (*cleanup)(struct flow_block_cb *block_cb),
+			 struct flow_block_offload *bo)
+{
+	struct flow_indir_dev_info *info;
+
+	info = find_indir_dev(data);
+	if (info)
+		return -EEXIST;
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->data = data;
+	info->dev = dev;
+	info->sch = sch;
+	info->type = type;
+	info->cleanup = cleanup;
+	info->command = bo->command;
+	info->binder_type = bo->binder_type;
+	info->cb_list = bo->cb_list_head;
+
+	list_add(&info->list, &flow_indir_dev_list);
+	return 0;
+}
+
+static int indir_dev_remove(void *data)
+{
+	struct flow_indir_dev_info *info;
+
+	info = find_indir_dev(data);
+	if (!info)
+		return -ENOENT;
+
+	list_del(&info->list);
+
+	kfree(info);
+	return 0;
+}
+
+int flow_indr_dev_setup_offload(struct net_device *dev,	struct Qdisc *sch,
+				enum tc_setup_type type, void *data,
+				struct flow_block_offload *bo,
+				void (*cleanup)(struct flow_block_cb *block_cb))
+{
+	struct flow_indr_dev *this;
+	u32 count = 0;
+	int err;
+
+	mutex_lock(&flow_indr_block_lock);
+	if (bo) {
+		if (bo->command == FLOW_BLOCK_BIND)
+			indir_dev_add(data, dev, sch, type, cleanup, bo);
+		else if (bo->command == FLOW_BLOCK_UNBIND)
+			indir_dev_remove(data);
+	}
+
+	list_for_each_entry(this, &flow_block_indr_dev_list, list) {
+		err = this->cb(dev, sch, this->cb_priv, type, bo, data, cleanup);
+		if (!err)
+			count++;
+	}
+
+	mutex_unlock(&flow_indr_block_lock);
+
+	return (bo && list_empty(&bo->cb_list)) ? -EOPNOTSUPP : count;
+}
+EXPORT_SYMBOL(flow_indr_dev_setup_offload);
+
+bool flow_indr_dev_exists(void)
+{
+	return !list_empty(&flow_block_indr_dev_list);
+}
+EXPORT_SYMBOL(flow_indr_dev_exists);