Commit e6445719 authored by Pravin B Shelar's avatar Pravin B Shelar Committed by Jesse Gross
Browse files

openvswitch: Restructure datapath.c and flow.c 



Over the time datapath.c and flow.c has became pretty large files.
Following patch restructures functionality of component into three
different components:

flow.c: contains flow extract.
flow_netlink.c: netlink flow api.
flow_table.c: flow table api.

This patch restructures code without changing logic.

Signed-off-by: default avatarPravin B Shelar <pshelar@nicira.com>
Signed-off-by: default avatarJesse Gross <jesse@nicira.com>
parent f0627cfa

net/openvswitch/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -9,6 +9,8 @@ openvswitch-y := \ 
	datapath.o \

	dp_notify.o \

	flow.o \

	flow_netlink.o \

	flow_table.o \

	vport.o \

	vport-internal_dev.o \

	vport-netdev.o

net/openvswitch/datapath.c

+30 −498
Original line number Diff line number Diff line
@@ -55,10 +55,10 @@ 


#include "datapath.h"

#include "flow.h"

#include "flow_netlink.h"

#include "vport-internal_dev.h"

#include "vport-netdev.h"





#define REHASH_FLOW_INTERVAL (10 * 60 * HZ)



int ovs_net_id __read_mostly;
@@ -235,7 +235,7 @@ void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb) 
	}



	/* Look up flow. */

	flow = ovs_flow_lookup(rcu_dereference(dp->table), &key);

	flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table), &key);

	if (unlikely(!flow)) {

		struct dp_upcall_info upcall;
@@ -433,7 +433,7 @@ static int queue_userspace_packet(struct net *net, int dp_ifindex, 
	upcall->dp_ifindex = dp_ifindex;



	nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);

	ovs_flow_to_nlattrs(upcall_info->key, upcall_info->key, user_skb);

	ovs_nla_put_flow(upcall_info->key, upcall_info->key, user_skb);

	nla_nest_end(user_skb, nla);



	if (upcall_info->userdata)
@@ -470,381 +470,6 @@ static int flush_flows(struct datapath *dp) 
	return 0;

}



static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, int attr_len)

{



	struct sw_flow_actions *acts;

	int new_acts_size;

	int req_size = NLA_ALIGN(attr_len);

	int next_offset = offsetof(struct sw_flow_actions, actions) +

					(*sfa)->actions_len;



	if (req_size <= (ksize(*sfa) - next_offset))

		goto out;



	new_acts_size = ksize(*sfa) * 2;



	if (new_acts_size > MAX_ACTIONS_BUFSIZE) {

		if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)

			return ERR_PTR(-EMSGSIZE);

		new_acts_size = MAX_ACTIONS_BUFSIZE;

	}



	acts = ovs_flow_actions_alloc(new_acts_size);

	if (IS_ERR(acts))

		return (void *)acts;



	memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);

	acts->actions_len = (*sfa)->actions_len;

	kfree(*sfa);

	*sfa = acts;



out:

	(*sfa)->actions_len += req_size;

	return  (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);

}



static int add_action(struct sw_flow_actions **sfa, int attrtype, void *data, int len)

{

	struct nlattr *a;



	a = reserve_sfa_size(sfa, nla_attr_size(len));

	if (IS_ERR(a))

		return PTR_ERR(a);



	a->nla_type = attrtype;

	a->nla_len = nla_attr_size(len);



	if (data)

		memcpy(nla_data(a), data, len);

	memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));



	return 0;

}



static inline int add_nested_action_start(struct sw_flow_actions **sfa, int attrtype)

{

	int used = (*sfa)->actions_len;

	int err;



	err = add_action(sfa, attrtype, NULL, 0);

	if (err)

		return err;



	return used;

}



static inline void add_nested_action_end(struct sw_flow_actions *sfa, int st_offset)

{

	struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions + st_offset);



	a->nla_len = sfa->actions_len - st_offset;

}



static int validate_and_copy_actions(const struct nlattr *attr,

				     const struct sw_flow_key *key, int depth,

				     struct sw_flow_actions **sfa);



static int validate_and_copy_sample(const struct nlattr *attr,

				    const struct sw_flow_key *key, int depth,

				    struct sw_flow_actions **sfa)

{

	const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];

	const struct nlattr *probability, *actions;

	const struct nlattr *a;

	int rem, start, err, st_acts;



	memset(attrs, 0, sizeof(attrs));

	nla_for_each_nested(a, attr, rem) {

		int type = nla_type(a);

		if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])

			return -EINVAL;

		attrs[type] = a;

	}

	if (rem)

		return -EINVAL;



	probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];

	if (!probability || nla_len(probability) != sizeof(u32))

		return -EINVAL;



	actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];

	if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))

		return -EINVAL;



	/* validation done, copy sample action. */

	start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE);

	if (start < 0)

		return start;

	err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY, nla_data(probability), sizeof(u32));

	if (err)

		return err;

	st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS);

	if (st_acts < 0)

		return st_acts;



	err = validate_and_copy_actions(actions, key, depth + 1, sfa);

	if (err)

		return err;



	add_nested_action_end(*sfa, st_acts);

	add_nested_action_end(*sfa, start);



	return 0;

}



static int validate_tp_port(const struct sw_flow_key *flow_key)

{

	if (flow_key->eth.type == htons(ETH_P_IP)) {

		if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst)

			return 0;

	} else if (flow_key->eth.type == htons(ETH_P_IPV6)) {

		if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst)

			return 0;

	}



	return -EINVAL;

}



static int validate_and_copy_set_tun(const struct nlattr *attr,

				     struct sw_flow_actions **sfa)

{

	struct sw_flow_match match;

	struct sw_flow_key key;

	int err, start;



	ovs_match_init(&match, &key, NULL);

	err = ovs_ipv4_tun_from_nlattr(nla_data(attr), &match, false);

	if (err)

		return err;



	start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET);

	if (start < 0)

		return start;



	err = add_action(sfa, OVS_KEY_ATTR_IPV4_TUNNEL, &match.key->tun_key,

			sizeof(match.key->tun_key));

	add_nested_action_end(*sfa, start);



	return err;

}



static int validate_set(const struct nlattr *a,

			const struct sw_flow_key *flow_key,

			struct sw_flow_actions **sfa,

			bool *set_tun)

{

	const struct nlattr *ovs_key = nla_data(a);

	int key_type = nla_type(ovs_key);



	/* There can be only one key in a action */

	if (nla_total_size(nla_len(ovs_key)) != nla_len(a))

		return -EINVAL;



	if (key_type > OVS_KEY_ATTR_MAX ||

	   (ovs_key_lens[key_type] != nla_len(ovs_key) &&

	    ovs_key_lens[key_type] != -1))

		return -EINVAL;



	switch (key_type) {

	const struct ovs_key_ipv4 *ipv4_key;

	const struct ovs_key_ipv6 *ipv6_key;

	int err;



	case OVS_KEY_ATTR_PRIORITY:

	case OVS_KEY_ATTR_SKB_MARK:

	case OVS_KEY_ATTR_ETHERNET:

		break;



	case OVS_KEY_ATTR_TUNNEL:

		*set_tun = true;

		err = validate_and_copy_set_tun(a, sfa);

		if (err)

			return err;

		break;



	case OVS_KEY_ATTR_IPV4:

		if (flow_key->eth.type != htons(ETH_P_IP))

			return -EINVAL;



		if (!flow_key->ip.proto)

			return -EINVAL;



		ipv4_key = nla_data(ovs_key);

		if (ipv4_key->ipv4_proto != flow_key->ip.proto)

			return -EINVAL;



		if (ipv4_key->ipv4_frag != flow_key->ip.frag)

			return -EINVAL;



		break;



	case OVS_KEY_ATTR_IPV6:

		if (flow_key->eth.type != htons(ETH_P_IPV6))

			return -EINVAL;



		if (!flow_key->ip.proto)

			return -EINVAL;



		ipv6_key = nla_data(ovs_key);

		if (ipv6_key->ipv6_proto != flow_key->ip.proto)

			return -EINVAL;



		if (ipv6_key->ipv6_frag != flow_key->ip.frag)

			return -EINVAL;



		if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)

			return -EINVAL;



		break;



	case OVS_KEY_ATTR_TCP:

		if (flow_key->ip.proto != IPPROTO_TCP)

			return -EINVAL;



		return validate_tp_port(flow_key);



	case OVS_KEY_ATTR_UDP:

		if (flow_key->ip.proto != IPPROTO_UDP)

			return -EINVAL;



		return validate_tp_port(flow_key);



	case OVS_KEY_ATTR_SCTP:

		if (flow_key->ip.proto != IPPROTO_SCTP)

			return -EINVAL;



		return validate_tp_port(flow_key);



	default:

		return -EINVAL;

	}



	return 0;

}



static int validate_userspace(const struct nlattr *attr)

{

	static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] =	{

		[OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },

		[OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },

	};

	struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];

	int error;



	error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,

				 attr, userspace_policy);

	if (error)

		return error;



	if (!a[OVS_USERSPACE_ATTR_PID] ||

	    !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))

		return -EINVAL;



	return 0;

}



static int copy_action(const struct nlattr *from,

		       struct sw_flow_actions **sfa)

{

	int totlen = NLA_ALIGN(from->nla_len);

	struct nlattr *to;



	to = reserve_sfa_size(sfa, from->nla_len);

	if (IS_ERR(to))

		return PTR_ERR(to);



	memcpy(to, from, totlen);

	return 0;

}



static int validate_and_copy_actions(const struct nlattr *attr,

				     const struct sw_flow_key *key,

				     int depth,

				     struct sw_flow_actions **sfa)

{

	const struct nlattr *a;

	int rem, err;



	if (depth >= SAMPLE_ACTION_DEPTH)

		return -EOVERFLOW;



	nla_for_each_nested(a, attr, rem) {

		/* Expected argument lengths, (u32)-1 for variable length. */

		static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {

			[OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),

			[OVS_ACTION_ATTR_USERSPACE] = (u32)-1,

			[OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),

			[OVS_ACTION_ATTR_POP_VLAN] = 0,

			[OVS_ACTION_ATTR_SET] = (u32)-1,

			[OVS_ACTION_ATTR_SAMPLE] = (u32)-1

		};

		const struct ovs_action_push_vlan *vlan;

		int type = nla_type(a);

		bool skip_copy;



		if (type > OVS_ACTION_ATTR_MAX ||

		    (action_lens[type] != nla_len(a) &&

		     action_lens[type] != (u32)-1))

			return -EINVAL;



		skip_copy = false;

		switch (type) {

		case OVS_ACTION_ATTR_UNSPEC:

			return -EINVAL;



		case OVS_ACTION_ATTR_USERSPACE:

			err = validate_userspace(a);

			if (err)

				return err;

			break;



		case OVS_ACTION_ATTR_OUTPUT:

			if (nla_get_u32(a) >= DP_MAX_PORTS)

				return -EINVAL;

			break;





		case OVS_ACTION_ATTR_POP_VLAN:

			break;



		case OVS_ACTION_ATTR_PUSH_VLAN:

			vlan = nla_data(a);

			if (vlan->vlan_tpid != htons(ETH_P_8021Q))

				return -EINVAL;

			if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))

				return -EINVAL;

			break;



		case OVS_ACTION_ATTR_SET:

			err = validate_set(a, key, sfa, &skip_copy);

			if (err)

				return err;

			break;



		case OVS_ACTION_ATTR_SAMPLE:

			err = validate_and_copy_sample(a, key, depth, sfa);

			if (err)

				return err;

			skip_copy = true;

			break;



		default:

			return -EINVAL;

		}

		if (!skip_copy) {

			err = copy_action(a, sfa);

			if (err)

				return err;

		}

	}



	if (rem > 0)

		return -EINVAL;



	return 0;

}



static void clear_stats(struct sw_flow *flow)

{

	flow->used = 0;
@@ -900,15 +525,16 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) 
	if (err)

		goto err_flow_free;



	err = ovs_flow_metadata_from_nlattrs(flow, a[OVS_PACKET_ATTR_KEY]);

	err = ovs_nla_get_flow_metadata(flow, a[OVS_PACKET_ATTR_KEY]);

	if (err)

		goto err_flow_free;

	acts = ovs_flow_actions_alloc(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));

	acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));

	err = PTR_ERR(acts);

	if (IS_ERR(acts))

		goto err_flow_free;



	err = validate_and_copy_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0, &acts);

	err = ovs_nla_copy_actions(a[OVS_PACKET_ATTR_ACTIONS],

				   &flow->key, 0, &acts);

	rcu_assign_pointer(flow->sf_acts, acts);

	if (err)

		goto err_flow_free;
@@ -1003,100 +629,6 @@ static struct genl_multicast_group ovs_dp_flow_multicast_group = { 
	.name = OVS_FLOW_MCGROUP

};



static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb);

static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)

{

	const struct nlattr *a;

	struct nlattr *start;

	int err = 0, rem;



	start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);

	if (!start)

		return -EMSGSIZE;



	nla_for_each_nested(a, attr, rem) {

		int type = nla_type(a);

		struct nlattr *st_sample;



		switch (type) {

		case OVS_SAMPLE_ATTR_PROBABILITY:

			if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY, sizeof(u32), nla_data(a)))

				return -EMSGSIZE;

			break;

		case OVS_SAMPLE_ATTR_ACTIONS:

			st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);

			if (!st_sample)

				return -EMSGSIZE;

			err = actions_to_attr(nla_data(a), nla_len(a), skb);

			if (err)

				return err;

			nla_nest_end(skb, st_sample);

			break;

		}

	}



	nla_nest_end(skb, start);

	return err;

}



static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)

{

	const struct nlattr *ovs_key = nla_data(a);

	int key_type = nla_type(ovs_key);

	struct nlattr *start;

	int err;



	switch (key_type) {

	case OVS_KEY_ATTR_IPV4_TUNNEL:

		start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);

		if (!start)

			return -EMSGSIZE;



		err = ovs_ipv4_tun_to_nlattr(skb, nla_data(ovs_key),

					     nla_data(ovs_key));

		if (err)

			return err;

		nla_nest_end(skb, start);

		break;

	default:

		if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))

			return -EMSGSIZE;

		break;

	}



	return 0;

}



static int actions_to_attr(const struct nlattr *attr, int len, struct sk_buff *skb)

{

	const struct nlattr *a;

	int rem, err;



	nla_for_each_attr(a, attr, len, rem) {

		int type = nla_type(a);



		switch (type) {

		case OVS_ACTION_ATTR_SET:

			err = set_action_to_attr(a, skb);

			if (err)

				return err;

			break;



		case OVS_ACTION_ATTR_SAMPLE:

			err = sample_action_to_attr(a, skb);

			if (err)

				return err;

			break;

		default:

			if (nla_put(skb, type, nla_len(a), nla_data(a)))

				return -EMSGSIZE;

			break;

		}

	}



	return 0;

}



static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)

{

	return NLMSG_ALIGN(sizeof(struct ovs_header))
@@ -1133,8 +665,7 @@ static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, 
	if (!nla)

		goto nla_put_failure;



	err = ovs_flow_to_nlattrs(&flow->unmasked_key,

			&flow->unmasked_key, skb);

	err = ovs_nla_put_flow(&flow->unmasked_key, &flow->unmasked_key, skb);

	if (err)

		goto error;

	nla_nest_end(skb, nla);
@@ -1143,7 +674,7 @@ static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, 
	if (!nla)

		goto nla_put_failure;



	err = ovs_flow_to_nlattrs(&flow->key, &flow->mask->key, skb);

	err = ovs_nla_put_flow(&flow->key, &flow->mask->key, skb);

	if (err)

		goto error;
@@ -1186,7 +717,8 @@ static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, 
		sf_acts = rcu_dereference_check(flow->sf_acts,

						lockdep_ovsl_is_held());



		err = actions_to_attr(sf_acts->actions, sf_acts->actions_len, skb);

		err = ovs_nla_put_actions(sf_acts->actions,

					  sf_acts->actions_len, skb);

		if (!err)

			nla_nest_end(skb, start);

		else {
@@ -1252,20 +784,20 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) 
		goto error;



	ovs_match_init(&match, &key, &mask);

	error = ovs_match_from_nlattrs(&match,

	error = ovs_nla_get_match(&match,

				  a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);

	if (error)

		goto error;



	/* Validate actions. */

	if (a[OVS_FLOW_ATTR_ACTIONS]) {

		acts = ovs_flow_actions_alloc(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));

		acts = ovs_nla_alloc_flow_actions(nla_len(a[OVS_FLOW_ATTR_ACTIONS]));

		error = PTR_ERR(acts);

		if (IS_ERR(acts))

			goto error;



		ovs_flow_key_mask(&masked_key, &key, &mask);

		error = validate_and_copy_actions(a[OVS_FLOW_ATTR_ACTIONS],

		ovs_flow_mask_key(&masked_key, &key, &mask);

		error = ovs_nla_copy_actions(a[OVS_FLOW_ATTR_ACTIONS],

					     &masked_key, 0, &acts);

		if (error) {

			OVS_NLERR("Flow actions may not be safe on all matching packets.\n");
@@ -1285,7 +817,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) 
	table = ovsl_dereference(dp->table);



	/* Check if this is a duplicate flow */

	flow = ovs_flow_lookup(table, &key);

	flow = ovs_flow_tbl_lookup(table, &key);

	if (!flow) {

		struct flow_table *new_table = NULL;

		struct sw_flow_mask *mask_p;
@@ -1336,7 +868,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) 
		rcu_assign_pointer(flow->sf_acts, acts);



		/* Put flow in bucket. */

		ovs_flow_insert(table, flow);

		ovs_flow_tbl_insert(table, flow);



		reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,

						info->snd_seq, OVS_FLOW_CMD_NEW);
@@ -1357,7 +889,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) 


		/* The unmasked key has to be the same for flow updates. */

		error = -EINVAL;

		if (!ovs_flow_cmp_unmasked_key(flow, &key, match.range.end)) {

		if (!ovs_flow_cmp_unmasked_key(flow, &match)) {

			OVS_NLERR("Flow modification message rejected, unmasked key does not match.\n");

			goto err_unlock_ovs;

		}
@@ -1365,7 +897,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) 
		/* Update actions. */

		old_acts = ovsl_dereference(flow->sf_acts);

		rcu_assign_pointer(flow->sf_acts, acts);

		ovs_flow_deferred_free_acts(old_acts);

		ovs_nla_free_flow_actions(old_acts);



		reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,

					       info->snd_seq, OVS_FLOW_CMD_NEW);
@@ -1414,7 +946,7 @@ static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) 
	}



	ovs_match_init(&match, &key, NULL);

	err = ovs_match_from_nlattrs(&match, a[OVS_FLOW_ATTR_KEY], NULL);

	err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);

	if (err)

		return err;
@@ -1426,8 +958,8 @@ static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) 
	}



	table = ovsl_dereference(dp->table);

	flow = ovs_flow_lookup_unmasked_key(table, &match);

	if (!flow) {

	flow = ovs_flow_tbl_lookup(table, &key);

	if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) {

		err = -ENOENT;

		goto unlock;

	}
@@ -1471,13 +1003,13 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) 
	}



	ovs_match_init(&match, &key, NULL);

	err = ovs_match_from_nlattrs(&match, a[OVS_FLOW_ATTR_KEY], NULL);

	err = ovs_nla_get_match(&match, a[OVS_FLOW_ATTR_KEY], NULL);

	if (err)

		goto unlock;



	table = ovsl_dereference(dp->table);

	flow = ovs_flow_lookup_unmasked_key(table, &match);

	if (!flow) {

	flow = ovs_flow_tbl_lookup(table, &key);

	if (!flow || !ovs_flow_cmp_unmasked_key(flow, &match)) {

		err = -ENOENT;

		goto unlock;

	}
@@ -1488,7 +1020,7 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) 
		goto unlock;

	}



	ovs_flow_remove(table, flow);

	ovs_flow_tbl_remove(table, flow);



	err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid,

				     info->snd_seq, 0, OVS_FLOW_CMD_DEL);
@@ -1524,7 +1056,7 @@ static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) 


		bucket = cb->args[0];

		obj = cb->args[1];

		flow = ovs_flow_dump_next(table, &bucket, &obj);

		flow = ovs_flow_tbl_dump_next(table, &bucket, &obj);

		if (!flow)

			break;

net/openvswitch/datapath.h

+1 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <linux/u64_stats_sync.h>



#include "flow.h"

#include "flow_table.h"

#include "vport.h"



#define DP_MAX_PORTS           USHRT_MAX

net/openvswitch/flow.c

+24 −1581

File changed.

Preview size limit exceeded, changes collapsed.

net/openvswitch/flow.h

+26 −102
Original line number Diff line number Diff line
@@ -33,14 +33,6 @@ 
#include <net/inet_ecn.h>



struct sk_buff;

struct sw_flow_mask;

struct flow_table;



struct sw_flow_actions {

	struct rcu_head rcu;

	u32 actions_len;

	struct nlattr actions[];

};



/* Used to memset ovs_key_ipv4_tunnel padding. */

#define OVS_TUNNEL_KEY_SIZE					\
@@ -127,6 +119,31 @@ struct sw_flow_key { 
	};

} __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */



struct sw_flow_key_range {

	size_t start;

	size_t end;

};



struct sw_flow_mask {

	int ref_count;

	struct rcu_head rcu;

	struct list_head list;

	struct sw_flow_key_range range;

	struct sw_flow_key key;

};



struct sw_flow_match {

	struct sw_flow_key *key;

	struct sw_flow_key_range range;

	struct sw_flow_mask *mask;

};



struct sw_flow_actions {

	struct rcu_head rcu;

	u32 actions_len;

	struct nlattr actions[];

};



struct sw_flow {

	struct rcu_head rcu;

	struct hlist_node hash_node[2];
@@ -144,20 +161,6 @@ struct sw_flow { 
	u8 tcp_flags;		/* Union of seen TCP flags. */

};



struct sw_flow_key_range {

	size_t start;

	size_t end;

};



struct sw_flow_match {

	struct sw_flow_key *key;

	struct sw_flow_key_range range;

	struct sw_flow_mask *mask;

};



void ovs_match_init(struct sw_flow_match *match,

		struct sw_flow_key *key, struct sw_flow_mask *mask);



struct arp_eth_header {

	__be16      ar_hrd;	/* format of hardware address   */

	__be16      ar_pro;	/* format of protocol address   */
@@ -172,88 +175,9 @@ struct arp_eth_header { 
	unsigned char       ar_tip[4];		/* target IP address        */

} __packed;



int ovs_flow_init(void);

void ovs_flow_exit(void);



struct sw_flow *ovs_flow_alloc(void);

void ovs_flow_deferred_free(struct sw_flow *);

void ovs_flow_free(struct sw_flow *, bool deferred);



struct sw_flow_actions *ovs_flow_actions_alloc(int actions_len);

void ovs_flow_deferred_free_acts(struct sw_flow_actions *);



int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *);

void ovs_flow_used(struct sw_flow *, struct sk_buff *);

u64 ovs_flow_used_time(unsigned long flow_jiffies);

int ovs_flow_to_nlattrs(const struct sw_flow_key *,

		const struct sw_flow_key *, struct sk_buff *);

int ovs_match_from_nlattrs(struct sw_flow_match *match,

		      const struct nlattr *,

		      const struct nlattr *);

int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow,

		const struct nlattr *attr);



#define MAX_ACTIONS_BUFSIZE    (32 * 1024)

#define TBL_MIN_BUCKETS		1024



struct flow_table {

	struct flex_array *buckets;

	unsigned int count, n_buckets;

	struct rcu_head rcu;

	struct list_head *mask_list;

	int node_ver;

	u32 hash_seed;

	bool keep_flows;

};



static inline int ovs_flow_tbl_count(struct flow_table *table)

{

	return table->count;

}



static inline int ovs_flow_tbl_need_to_expand(struct flow_table *table)

{

	return (table->count > table->n_buckets);

}



struct sw_flow *ovs_flow_lookup(struct flow_table *,

				const struct sw_flow_key *);

struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table,

				    struct sw_flow_match *match);



void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred);

struct flow_table *ovs_flow_tbl_alloc(int new_size);

struct flow_table *ovs_flow_tbl_expand(struct flow_table *table);

struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table);



void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow);

void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow);



struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *idx);

extern const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1];

int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr,

			     struct sw_flow_match *match, bool is_mask);

int ovs_ipv4_tun_to_nlattr(struct sk_buff *skb,

			   const struct ovs_key_ipv4_tunnel *tun_key,

			   const struct ovs_key_ipv4_tunnel *output);



bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,

		const struct sw_flow_key *key, int key_end);



struct sw_flow_mask {

	int ref_count;

	struct rcu_head rcu;

	struct list_head list;

	struct sw_flow_key_range range;

	struct sw_flow_key key;

};

int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *);



struct sw_flow_mask *ovs_sw_flow_mask_alloc(void);

void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *);

void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *, bool deferred);

void ovs_sw_flow_mask_insert(struct flow_table *, struct sw_flow_mask *);

struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *,

		const struct sw_flow_mask *);

void ovs_flow_key_mask(struct sw_flow_key *dst, const struct sw_flow_key *src,

		       const struct sw_flow_mask *mask);

#endif /* flow.h */

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