[ovs-dev] [PATCH v4 1/3] datapath: Restructure datapath.c and flow.c
Pravin B Shelar
pshelar at nicira.com
Tue Oct 1 21:39:45 UTC 2013
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.
Diffstat is showing wrong count. This patch mostly restructures code
without changing logic.
Signed-off-by: Pravin B Shelar <pshelar at nicira.com>
---
v4:
coding style fixes, rebase fixes.
v3:
Added flow_netlink.h
Prefix function names.
v2:
No change.
---
datapath/Modules.mk | 4 +
datapath/datapath.c | 525 +-----------
datapath/datapath.h | 1 +
datapath/flow.c | 1621 +----------------------------------
datapath/flow.h | 128 +---
datapath/{flow.c => flow_netlink.c} | 1502 +++++++++++----------------------
datapath/flow_netlink.h | 57 ++
datapath/flow_table.c | 535 ++++++++++++
datapath/flow_table.h | 94 ++
9 files changed, 1266 insertions(+), 3201 deletions(-)
copy datapath/{flow.c => flow_netlink.c} (55%)
create mode 100644 datapath/flow_netlink.h
create mode 100644 datapath/flow_table.c
create mode 100644 datapath/flow_table.h
diff --git a/datapath/Modules.mk b/datapath/Modules.mk
index 7ddf79c..b652411 100644
--- a/datapath/Modules.mk
+++ b/datapath/Modules.mk
@@ -11,6 +11,8 @@ openvswitch_sources = \
datapath.c \
dp_notify.c \
flow.c \
+ flow_netlink.c \
+ flow_table.c \
vport.c \
vport-gre.c \
vport-internal_dev.c \
@@ -22,6 +24,8 @@ openvswitch_headers = \
compat.h \
datapath.h \
flow.h \
+ flow_netlink.h \
+ flow_table.h \
vlan.h \
vport.h \
vport-internal_dev.h \
diff --git a/datapath/datapath.c b/datapath/datapath.c
index 4defcdb..940120c 100644
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -56,6 +56,7 @@
#include "datapath.h"
#include "flow.h"
+#include "flow_netlink.h"
#include "vlan.h"
#include "vport-internal_dev.h"
#include "vport-netdev.h"
@@ -236,7 +237,7 @@ 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;
@@ -435,7 +436,7 @@ 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)
@@ -472,381 +473,6 @@ 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;
@@ -902,15 +528,16 @@ 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;
@@ -1005,100 +632,6 @@ 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))
@@ -1135,8 +668,7 @@ 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);
@@ -1145,7 +677,7 @@ 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;
@@ -1188,7 +720,8 @@ 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 {
@@ -1254,21 +787,21 @@ 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,
- a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
+ 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],
- &masked_key, 0, &acts);
+ 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");
goto err_kfree;
@@ -1287,7 +820,7 @@ 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;
@@ -1338,7 +871,7 @@ 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);
@@ -1359,7 +892,7 @@ 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;
}
@@ -1367,7 +900,7 @@ 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);
@@ -1416,7 +949,7 @@ 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;
@@ -1428,8 +961,8 @@ 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;
}
@@ -1473,13 +1006,13 @@ 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;
}
@@ -1490,7 +1023,7 @@ 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);
@@ -1526,7 +1059,7 @@ 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;
diff --git a/datapath/datapath.h b/datapath/datapath.h
index 4a49a7d..403ea00 100644
--- a/datapath/datapath.h
+++ b/datapath/datapath.h
@@ -28,6 +28,7 @@
#include "compat.h"
#include "flow.h"
+#include "flow_table.h"
#include "vlan.h"
#include "vport.h"
diff --git a/datapath/flow.c b/datapath/flow.c
index 29122af..faa4e15 100644
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -46,202 +46,40 @@
#include "vlan.h"
-static struct kmem_cache *flow_cache;
-
-static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask,
- struct sw_flow_key_range *range, u8 val);
-
-static void update_range__(struct sw_flow_match *match,
- size_t offset, size_t size, bool is_mask)
+u64 ovs_flow_used_time(unsigned long flow_jiffies)
{
- struct sw_flow_key_range *range = NULL;
- size_t start = rounddown(offset, sizeof(long));
- size_t end = roundup(offset + size, sizeof(long));
-
- if (!is_mask)
- range = &match->range;
- else if (match->mask)
- range = &match->mask->range;
-
- if (!range)
- return;
-
- if (range->start == range->end) {
- range->start = start;
- range->end = end;
- return;
- }
-
- if (range->start > start)
- range->start = start;
+ struct timespec cur_ts;
+ u64 cur_ms, idle_ms;
- if (range->end < end)
- range->end = end;
-}
+ ktime_get_ts(&cur_ts);
+ idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
+ cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
+ cur_ts.tv_nsec / NSEC_PER_MSEC;
-#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
- do { \
- update_range__(match, offsetof(struct sw_flow_key, field), \
- sizeof((match)->key->field), is_mask); \
- if (is_mask) { \
- if ((match)->mask) \
- (match)->mask->key.field = value; \
- } else { \
- (match)->key->field = value; \
- } \
- } while (0)
-
-#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
- do { \
- update_range__(match, offsetof(struct sw_flow_key, field), \
- len, is_mask); \
- if (is_mask) { \
- if ((match)->mask) \
- memcpy(&(match)->mask->key.field, value_p, len);\
- } else { \
- memcpy(&(match)->key->field, value_p, len); \
- } \
- } while (0)
-
-static u16 range_n_bytes(const struct sw_flow_key_range *range)
-{
- return range->end - range->start;
+ return cur_ms - idle_ms;
}
-void ovs_match_init(struct sw_flow_match *match,
- struct sw_flow_key *key,
- struct sw_flow_mask *mask)
-{
- memset(match, 0, sizeof(*match));
- match->key = key;
- match->mask = mask;
-
- memset(key, 0, sizeof(*key));
-
- if (mask) {
- memset(&mask->key, 0, sizeof(mask->key));
- mask->range.start = mask->range.end = 0;
- }
-}
+#define TCP_FLAGS_OFFSET 13
+#define TCP_FLAG_MASK 0x3f
-static bool ovs_match_validate(const struct sw_flow_match *match,
- u64 key_attrs, u64 mask_attrs)
+void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb)
{
- u64 key_expected = 1ULL << OVS_KEY_ATTR_ETHERNET;
- u64 mask_allowed = key_attrs; /* At most allow all key attributes */
-
- /* The following mask attributes allowed only if they
- * pass the validation tests. */
- mask_allowed &= ~((1ULL << OVS_KEY_ATTR_IPV4)
- | (1ULL << OVS_KEY_ATTR_IPV6)
- | (1ULL << OVS_KEY_ATTR_TCP)
- | (1ULL << OVS_KEY_ATTR_UDP)
- | (1ULL << OVS_KEY_ATTR_SCTP)
- | (1ULL << OVS_KEY_ATTR_ICMP)
- | (1ULL << OVS_KEY_ATTR_ICMPV6)
- | (1ULL << OVS_KEY_ATTR_ARP)
- | (1ULL << OVS_KEY_ATTR_ND));
-
- /* Always allowed mask fields. */
- mask_allowed |= ((1ULL << OVS_KEY_ATTR_TUNNEL)
- | (1ULL << OVS_KEY_ATTR_IN_PORT)
- | (1ULL << OVS_KEY_ATTR_ETHERTYPE));
-
- /* Check key attributes. */
- if (match->key->eth.type == htons(ETH_P_ARP)
- || match->key->eth.type == htons(ETH_P_RARP)) {
- key_expected |= 1ULL << OVS_KEY_ATTR_ARP;
- if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_ARP;
- }
-
- if (match->key->eth.type == htons(ETH_P_IP)) {
- key_expected |= 1ULL << OVS_KEY_ATTR_IPV4;
- if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV4;
-
- if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
- if (match->key->ip.proto == IPPROTO_UDP) {
- key_expected |= 1ULL << OVS_KEY_ATTR_UDP;
- if (match->mask && (match->mask->key.ip.proto == 0xff))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP;
- }
-
- if (match->key->ip.proto == IPPROTO_SCTP) {
- key_expected |= 1ULL << OVS_KEY_ATTR_SCTP;
- if (match->mask && (match->mask->key.ip.proto == 0xff))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP;
- }
-
- if (match->key->ip.proto == IPPROTO_TCP) {
- key_expected |= 1ULL << OVS_KEY_ATTR_TCP;
- if (match->mask && (match->mask->key.ip.proto == 0xff))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP;
- }
-
- if (match->key->ip.proto == IPPROTO_ICMP) {
- key_expected |= 1ULL << OVS_KEY_ATTR_ICMP;
- if (match->mask && (match->mask->key.ip.proto == 0xff))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMP;
- }
- }
- }
-
- if (match->key->eth.type == htons(ETH_P_IPV6)) {
- key_expected |= 1ULL << OVS_KEY_ATTR_IPV6;
- if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV6;
-
- if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
- if (match->key->ip.proto == IPPROTO_UDP) {
- key_expected |= 1ULL << OVS_KEY_ATTR_UDP;
- if (match->mask && (match->mask->key.ip.proto == 0xff))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP;
- }
-
- if (match->key->ip.proto == IPPROTO_SCTP) {
- key_expected |= 1ULL << OVS_KEY_ATTR_SCTP;
- if (match->mask && (match->mask->key.ip.proto == 0xff))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP;
- }
-
- if (match->key->ip.proto == IPPROTO_TCP) {
- key_expected |= 1ULL << OVS_KEY_ATTR_TCP;
- if (match->mask && (match->mask->key.ip.proto == 0xff))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP;
- }
-
- if (match->key->ip.proto == IPPROTO_ICMPV6) {
- key_expected |= 1ULL << OVS_KEY_ATTR_ICMPV6;
- if (match->mask && (match->mask->key.ip.proto == 0xff))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMPV6;
-
- if (match->key->ipv6.tp.src ==
- htons(NDISC_NEIGHBOUR_SOLICITATION) ||
- match->key->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
- key_expected |= 1ULL << OVS_KEY_ATTR_ND;
- if (match->mask && (match->mask->key.ipv6.tp.src == htons(0xffff)))
- mask_allowed |= 1ULL << OVS_KEY_ATTR_ND;
- }
- }
- }
- }
-
- if ((key_attrs & key_expected) != key_expected) {
- /* Key attributes check failed. */
- OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n",
- key_attrs, key_expected);
- return false;
- }
+ u8 tcp_flags = 0;
- if ((mask_attrs & mask_allowed) != mask_attrs) {
- /* Mask attributes check failed. */
- OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n",
- mask_attrs, mask_allowed);
- return false;
+ if ((flow->key.eth.type == htons(ETH_P_IP) ||
+ flow->key.eth.type == htons(ETH_P_IPV6)) &&
+ flow->key.ip.proto == IPPROTO_TCP &&
+ likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
+ u8 *tcp = (u8 *)tcp_hdr(skb);
+ tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK;
}
- return true;
+ spin_lock(&flow->lock);
+ flow->used = jiffies;
+ flow->packet_count++;
+ flow->byte_count += skb->len;
+ flow->tcp_flags |= tcp_flags;
+ spin_unlock(&flow->lock);
}
static int check_header(struct sk_buff *skb, int len)
@@ -312,19 +150,6 @@ static bool icmphdr_ok(struct sk_buff *skb)
sizeof(struct icmphdr));
}
-u64 ovs_flow_used_time(unsigned long flow_jiffies)
-{
- struct timespec cur_ts;
- u64 cur_ms, idle_ms;
-
- ktime_get_ts(&cur_ts);
- idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
- cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
- cur_ts.tv_nsec / NSEC_PER_MSEC;
-
- return cur_ms - idle_ms;
-}
-
static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
{
unsigned int nh_ofs = skb_network_offset(skb);
@@ -373,319 +198,6 @@ static bool icmp6hdr_ok(struct sk_buff *skb)
sizeof(struct icmp6hdr));
}
-void ovs_flow_key_mask(struct sw_flow_key *dst, const struct sw_flow_key *src,
- const struct sw_flow_mask *mask)
-{
- const long *m = (long *)((u8 *)&mask->key + mask->range.start);
- const long *s = (long *)((u8 *)src + mask->range.start);
- long *d = (long *)((u8 *)dst + mask->range.start);
- int i;
-
- /* The memory outside of the 'mask->range' are not set since
- * further operations on 'dst' only uses contents within
- * 'mask->range'.
- */
- for (i = 0; i < range_n_bytes(&mask->range); i += sizeof(long))
- *d++ = *s++ & *m++;
-}
-
-#define TCP_FLAGS_OFFSET 13
-#define TCP_FLAG_MASK 0x3f
-
-void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb)
-{
- u8 tcp_flags = 0;
-
- if ((flow->key.eth.type == htons(ETH_P_IP) ||
- flow->key.eth.type == htons(ETH_P_IPV6)) &&
- flow->key.ip.proto == IPPROTO_TCP &&
- likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
- u8 *tcp = (u8 *)tcp_hdr(skb);
- tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK;
- }
-
- spin_lock(&flow->lock);
- flow->used = jiffies;
- flow->packet_count++;
- flow->byte_count += skb->len;
- flow->tcp_flags |= tcp_flags;
- spin_unlock(&flow->lock);
-}
-
-struct sw_flow_actions *ovs_flow_actions_alloc(int size)
-{
- struct sw_flow_actions *sfa;
-
- if (size > MAX_ACTIONS_BUFSIZE)
- return ERR_PTR(-EINVAL);
-
- sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
- if (!sfa)
- return ERR_PTR(-ENOMEM);
-
- sfa->actions_len = 0;
- return sfa;
-}
-
-struct sw_flow *ovs_flow_alloc(void)
-{
- struct sw_flow *flow;
-
- flow = kmem_cache_alloc(flow_cache, GFP_KERNEL);
- if (!flow)
- return ERR_PTR(-ENOMEM);
-
- spin_lock_init(&flow->lock);
- flow->sf_acts = NULL;
- flow->mask = NULL;
-
- return flow;
-}
-
-static struct hlist_head *find_bucket(struct flow_table *table, u32 hash)
-{
- hash = jhash_1word(hash, table->hash_seed);
- return flex_array_get(table->buckets,
- (hash & (table->n_buckets - 1)));
-}
-
-static struct flex_array *alloc_buckets(unsigned int n_buckets)
-{
- struct flex_array *buckets;
- int i, err;
-
- buckets = flex_array_alloc(sizeof(struct hlist_head),
- n_buckets, GFP_KERNEL);
- if (!buckets)
- return NULL;
-
- err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL);
- if (err) {
- flex_array_free(buckets);
- return NULL;
- }
-
- for (i = 0; i < n_buckets; i++)
- INIT_HLIST_HEAD((struct hlist_head *)
- flex_array_get(buckets, i));
-
- return buckets;
-}
-
-static void free_buckets(struct flex_array *buckets)
-{
- flex_array_free(buckets);
-}
-
-static struct flow_table *__flow_tbl_alloc(int new_size)
-{
- struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL);
-
- if (!table)
- return NULL;
-
- table->buckets = alloc_buckets(new_size);
-
- if (!table->buckets) {
- kfree(table);
- return NULL;
- }
- table->n_buckets = new_size;
- table->count = 0;
- table->node_ver = 0;
- table->keep_flows = false;
- get_random_bytes(&table->hash_seed, sizeof(u32));
- table->mask_list = NULL;
-
- return table;
-}
-
-static void __flow_tbl_destroy(struct flow_table *table)
-{
- int i;
-
- if (table->keep_flows)
- goto skip_flows;
-
- for (i = 0; i < table->n_buckets; i++) {
- struct sw_flow *flow;
- struct hlist_head *head = flex_array_get(table->buckets, i);
- struct hlist_node *n;
- int ver = table->node_ver;
-
- hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) {
- hlist_del(&flow->hash_node[ver]);
- ovs_flow_free(flow, false);
- }
- }
-
- BUG_ON(!list_empty(table->mask_list));
- kfree(table->mask_list);
-
-skip_flows:
- free_buckets(table->buckets);
- kfree(table);
-}
-
-struct flow_table *ovs_flow_tbl_alloc(int new_size)
-{
- struct flow_table *table = __flow_tbl_alloc(new_size);
-
- if (!table)
- return NULL;
-
- table->mask_list = kmalloc(sizeof(struct list_head), GFP_KERNEL);
- if (!table->mask_list) {
- table->keep_flows = true;
- __flow_tbl_destroy(table);
- return NULL;
- }
- INIT_LIST_HEAD(table->mask_list);
-
- return table;
-}
-
-static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu)
-{
- struct flow_table *table = container_of(rcu, struct flow_table, rcu);
-
- __flow_tbl_destroy(table);
-}
-
-void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred)
-{
- if (!table)
- return;
-
- if (deferred)
- call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb);
- else
- __flow_tbl_destroy(table);
-}
-
-struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *last)
-{
- struct sw_flow *flow;
- struct hlist_head *head;
- int ver;
- int i;
-
- ver = table->node_ver;
- while (*bucket < table->n_buckets) {
- i = 0;
- head = flex_array_get(table->buckets, *bucket);
- hlist_for_each_entry_rcu(flow, head, hash_node[ver]) {
- if (i < *last) {
- i++;
- continue;
- }
- *last = i + 1;
- return flow;
- }
- (*bucket)++;
- *last = 0;
- }
-
- return NULL;
-}
-
-static void __tbl_insert(struct flow_table *table, struct sw_flow *flow)
-{
- struct hlist_head *head;
-
- head = find_bucket(table, flow->hash);
- hlist_add_head_rcu(&flow->hash_node[table->node_ver], head);
-
- table->count++;
-}
-
-static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new)
-{
- int old_ver;
- int i;
-
- old_ver = old->node_ver;
- new->node_ver = !old_ver;
-
- /* Insert in new table. */
- for (i = 0; i < old->n_buckets; i++) {
- struct sw_flow *flow;
- struct hlist_head *head;
-
- head = flex_array_get(old->buckets, i);
-
- hlist_for_each_entry(flow, head, hash_node[old_ver])
- __tbl_insert(new, flow);
- }
-
- new->mask_list = old->mask_list;
- old->keep_flows = true;
-}
-
-static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets)
-{
- struct flow_table *new_table;
-
- new_table = __flow_tbl_alloc(n_buckets);
- if (!new_table)
- return ERR_PTR(-ENOMEM);
-
- flow_table_copy_flows(table, new_table);
-
- return new_table;
-}
-
-struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table)
-{
- return __flow_tbl_rehash(table, table->n_buckets);
-}
-
-struct flow_table *ovs_flow_tbl_expand(struct flow_table *table)
-{
- return __flow_tbl_rehash(table, table->n_buckets * 2);
-}
-
-static void __flow_free(struct sw_flow *flow)
-{
- kfree((struct sf_flow_acts __force *)flow->sf_acts);
- kmem_cache_free(flow_cache, flow);
-}
-
-static void rcu_free_flow_callback(struct rcu_head *rcu)
-{
- struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
-
- __flow_free(flow);
-}
-
-void ovs_flow_free(struct sw_flow *flow, bool deferred)
-{
- if (!flow)
- return;
-
- ovs_sw_flow_mask_del_ref(flow->mask, deferred);
-
- if (deferred)
- call_rcu(&flow->rcu, rcu_free_flow_callback);
- else
- __flow_free(flow);
-}
-
-/* RCU callback used by ovs_flow_deferred_free_acts. */
-static void rcu_free_acts_callback(struct rcu_head *rcu)
-{
- struct sw_flow_actions *sf_acts = container_of(rcu,
- struct sw_flow_actions, rcu);
- kfree(sf_acts);
-}
-
-/* Schedules 'sf_acts' to be freed after the next RCU grace period.
- * The caller must hold rcu_read_lock for this to be sensible. */
-void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts)
-{
- call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
-}
-
static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
{
struct qtag_prefix {
@@ -1010,1088 +522,3 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
return 0;
}
-
-static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start,
- int key_end)
-{
- u32 *hash_key = (u32 *)((u8 *)key + key_start);
- int hash_u32s = (key_end - key_start) >> 2;
-
- /* Make sure number of hash bytes are multiple of u32. */
- BUILD_BUG_ON(sizeof(long) % sizeof(u32));
-
- return jhash2(hash_key, hash_u32s, 0);
-}
-
-static int flow_key_start(const struct sw_flow_key *key)
-{
- if (key->tun_key.ipv4_dst)
- return 0;
- else
- return rounddown(offsetof(struct sw_flow_key, phy),
- sizeof(long));
-}
-
-static bool __cmp_key(const struct sw_flow_key *key1,
- const struct sw_flow_key *key2, int key_start, int key_end)
-{
- const long *cp1 = (long *)((u8 *)key1 + key_start);
- const long *cp2 = (long *)((u8 *)key2 + key_start);
- long diffs = 0;
- int i;
-
- for (i = key_start; i < key_end; i += sizeof(long))
- diffs |= *cp1++ ^ *cp2++;
-
- return diffs == 0;
-}
-
-static bool __flow_cmp_masked_key(const struct sw_flow *flow,
- const struct sw_flow_key *key, int key_start, int key_end)
-{
- return __cmp_key(&flow->key, key, key_start, key_end);
-}
-
-static bool __flow_cmp_unmasked_key(const struct sw_flow *flow,
- const struct sw_flow_key *key, int key_start, int key_end)
-{
- return __cmp_key(&flow->unmasked_key, key, key_start, key_end);
-}
-
-bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
- const struct sw_flow_key *key, int key_end)
-{
- int key_start;
- key_start = flow_key_start(key);
-
- return __flow_cmp_unmasked_key(flow, key, key_start, key_end);
-
-}
-
-struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table,
- struct sw_flow_match *match)
-{
- struct sw_flow_key *unmasked = match->key;
- int key_end = match->range.end;
- struct sw_flow *flow;
-
- flow = ovs_flow_lookup(table, unmasked);
- if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_end)))
- flow = NULL;
-
- return flow;
-}
-
-static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table,
- const struct sw_flow_key *unmasked,
- struct sw_flow_mask *mask)
-{
- struct sw_flow *flow;
- struct hlist_head *head;
- int key_start = mask->range.start;
- int key_end = mask->range.end;
- u32 hash;
- struct sw_flow_key masked_key;
-
- ovs_flow_key_mask(&masked_key, unmasked, mask);
- hash = ovs_flow_hash(&masked_key, key_start, key_end);
- head = find_bucket(table, hash);
- hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) {
- if (flow->mask == mask &&
- __flow_cmp_masked_key(flow, &masked_key,
- key_start, key_end))
- return flow;
- }
- return NULL;
-}
-
-struct sw_flow *ovs_flow_lookup(struct flow_table *tbl,
- const struct sw_flow_key *key)
-{
- struct sw_flow *flow = NULL;
- struct sw_flow_mask *mask;
-
- list_for_each_entry_rcu(mask, tbl->mask_list, list) {
- flow = ovs_masked_flow_lookup(tbl, key, mask);
- if (flow) /* Found */
- break;
- }
-
- return flow;
-}
-
-
-void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow)
-{
- flow->hash = ovs_flow_hash(&flow->key, flow->mask->range.start,
- flow->mask->range.end);
- __tbl_insert(table, flow);
-}
-
-void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow)
-{
- BUG_ON(table->count == 0);
- hlist_del_rcu(&flow->hash_node[table->node_ver]);
- table->count--;
-}
-
-/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
-const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
- [OVS_KEY_ATTR_ENCAP] = -1,
- [OVS_KEY_ATTR_PRIORITY] = sizeof(u32),
- [OVS_KEY_ATTR_IN_PORT] = sizeof(u32),
- [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32),
- [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet),
- [OVS_KEY_ATTR_VLAN] = sizeof(__be16),
- [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16),
- [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4),
- [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6),
- [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp),
- [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp),
- [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp),
- [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp),
- [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6),
- [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp),
- [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd),
- [OVS_KEY_ATTR_TUNNEL] = -1,
-};
-
-static bool is_all_zero(const u8 *fp, size_t size)
-{
- int i;
-
- if (!fp)
- return false;
-
- for (i = 0; i < size; i++)
- if (fp[i])
- return false;
-
- return true;
-}
-
-static int __parse_flow_nlattrs(const struct nlattr *attr,
- const struct nlattr *a[],
- u64 *attrsp, bool nz)
-{
- const struct nlattr *nla;
- u64 attrs;
- int rem;
-
- attrs = *attrsp;
- nla_for_each_nested(nla, attr, rem) {
- u16 type = nla_type(nla);
- int expected_len;
-
- if (type > OVS_KEY_ATTR_MAX) {
- OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n",
- type, OVS_KEY_ATTR_MAX);
- return -EINVAL;
- }
-
- if (attrs & (1ULL << type)) {
- OVS_NLERR("Duplicate key attribute (type %d).\n", type);
- return -EINVAL;
- }
-
- expected_len = ovs_key_lens[type];
- if (nla_len(nla) != expected_len && expected_len != -1) {
- OVS_NLERR("Key attribute has unexpected length (type=%d"
- ", length=%d, expected=%d).\n", type,
- nla_len(nla), expected_len);
- return -EINVAL;
- }
-
- if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
- attrs |= 1ULL << type;
- a[type] = nla;
- }
- }
- if (rem) {
- OVS_NLERR("Message has %d unknown bytes.\n", rem);
- return -EINVAL;
- }
-
- *attrsp = attrs;
- return 0;
-}
-
-static int parse_flow_mask_nlattrs(const struct nlattr *attr,
- const struct nlattr *a[], u64 *attrsp)
-{
- return __parse_flow_nlattrs(attr, a, attrsp, true);
-}
-
-static int parse_flow_nlattrs(const struct nlattr *attr,
- const struct nlattr *a[], u64 *attrsp)
-{
- return __parse_flow_nlattrs(attr, a, attrsp, false);
-}
-
-int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr,
- struct sw_flow_match *match, bool is_mask)
-{
- struct nlattr *a;
- int rem;
- bool ttl = false;
- __be16 tun_flags = 0;
-
- nla_for_each_nested(a, attr, rem) {
- int type = nla_type(a);
- static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
- [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64),
- [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32),
- [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32),
- [OVS_TUNNEL_KEY_ATTR_TOS] = 1,
- [OVS_TUNNEL_KEY_ATTR_TTL] = 1,
- [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0,
- [OVS_TUNNEL_KEY_ATTR_CSUM] = 0,
- };
-
- if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
- OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n",
- type, OVS_TUNNEL_KEY_ATTR_MAX);
- return -EINVAL;
- }
-
- if (ovs_tunnel_key_lens[type] != nla_len(a)) {
- OVS_NLERR("IPv4 tunnel attribute type has unexpected "
- " length (type=%d, length=%d, expected=%d).\n",
- type, nla_len(a), ovs_tunnel_key_lens[type]);
- return -EINVAL;
- }
-
- switch (type) {
- case OVS_TUNNEL_KEY_ATTR_ID:
- SW_FLOW_KEY_PUT(match, tun_key.tun_id,
- nla_get_be64(a), is_mask);
- tun_flags |= TUNNEL_KEY;
- break;
- case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
- SW_FLOW_KEY_PUT(match, tun_key.ipv4_src,
- nla_get_be32(a), is_mask);
- break;
- case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
- SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
- nla_get_be32(a), is_mask);
- break;
- case OVS_TUNNEL_KEY_ATTR_TOS:
- SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos,
- nla_get_u8(a), is_mask);
- break;
- case OVS_TUNNEL_KEY_ATTR_TTL:
- SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl,
- nla_get_u8(a), is_mask);
- ttl = true;
- break;
- case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
- tun_flags |= TUNNEL_DONT_FRAGMENT;
- break;
- case OVS_TUNNEL_KEY_ATTR_CSUM:
- tun_flags |= TUNNEL_CSUM;
- break;
- default:
- return -EINVAL;
- }
- }
-
- SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
-
- if (rem > 0) {
- OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem);
- return -EINVAL;
- }
-
- if (!is_mask) {
- if (!match->key->tun_key.ipv4_dst) {
- OVS_NLERR("IPv4 tunnel destination address is zero.\n");
- return -EINVAL;
- }
-
- if (!ttl) {
- OVS_NLERR("IPv4 tunnel TTL not specified.\n");
- return -EINVAL;
- }
- }
-
- return 0;
-}
-
-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)
-{
- struct nlattr *nla;
-
- nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
- if (!nla)
- return -EMSGSIZE;
-
- if (output->tun_flags & TUNNEL_KEY &&
- nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
- return -EMSGSIZE;
- if (output->ipv4_src &&
- nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src))
- return -EMSGSIZE;
- if (output->ipv4_dst &&
- nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst))
- return -EMSGSIZE;
- if (output->ipv4_tos &&
- nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
- return -EMSGSIZE;
- if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl))
- return -EMSGSIZE;
- if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
- nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
- return -EMSGSIZE;
- if ((output->tun_flags & TUNNEL_CSUM) &&
- nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
- return -EMSGSIZE;
-
- nla_nest_end(skb, nla);
- return 0;
-}
-
-
-static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
- const struct nlattr **a, bool is_mask)
-{
- if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) {
- SW_FLOW_KEY_PUT(match, phy.priority,
- nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
- *attrs &= ~(1ULL << OVS_KEY_ATTR_PRIORITY);
- }
-
- if (*attrs & (1ULL << OVS_KEY_ATTR_IN_PORT)) {
- u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
-
- if (is_mask)
- in_port = 0xffffffff; /* Always exact match in_port. */
- else if (in_port >= DP_MAX_PORTS)
- return -EINVAL;
-
- SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
- *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT);
- } else if (!is_mask) {
- SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
- }
-
- if (*attrs & (1ULL << OVS_KEY_ATTR_SKB_MARK)) {
- uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
-
- SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
- *attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK);
- }
- if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) {
- if (ovs_ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
- is_mask))
- return -EINVAL;
- *attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL);
- }
- return 0;
-}
-
-static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
- const struct nlattr **a, bool is_mask)
-{
- int err;
- u64 orig_attrs = attrs;
-
- err = metadata_from_nlattrs(match, &attrs, a, is_mask);
- if (err)
- return err;
-
- if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) {
- const struct ovs_key_ethernet *eth_key;
-
- eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
- SW_FLOW_KEY_MEMCPY(match, eth.src,
- eth_key->eth_src, ETH_ALEN, is_mask);
- SW_FLOW_KEY_MEMCPY(match, eth.dst,
- eth_key->eth_dst, ETH_ALEN, is_mask);
- attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERNET);
- }
-
- if (attrs & (1ULL << OVS_KEY_ATTR_VLAN)) {
- __be16 tci;
-
- tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
- if (!(tci & htons(VLAN_TAG_PRESENT))) {
- if (is_mask)
- OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n");
- else
- OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n");
-
- return -EINVAL;
- }
-
- SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
- attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN);
- } else if (!is_mask)
- SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
-
- if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) {
- __be16 eth_type;
-
- eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
- if (is_mask) {
- /* Always exact match EtherType. */
- eth_type = htons(0xffff);
- } else if (ntohs(eth_type) < ETH_P_802_3_MIN) {
- OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n",
- ntohs(eth_type), ETH_P_802_3_MIN);
- return -EINVAL;
- }
-
- SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
- attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
- } else if (!is_mask) {
- SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
- }
-
- if (attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
- const struct ovs_key_ipv4 *ipv4_key;
-
- ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
- if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
- OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n",
- ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
- return -EINVAL;
- }
- SW_FLOW_KEY_PUT(match, ip.proto,
- ipv4_key->ipv4_proto, is_mask);
- SW_FLOW_KEY_PUT(match, ip.tos,
- ipv4_key->ipv4_tos, is_mask);
- SW_FLOW_KEY_PUT(match, ip.ttl,
- ipv4_key->ipv4_ttl, is_mask);
- SW_FLOW_KEY_PUT(match, ip.frag,
- ipv4_key->ipv4_frag, is_mask);
- SW_FLOW_KEY_PUT(match, ipv4.addr.src,
- ipv4_key->ipv4_src, is_mask);
- SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
- ipv4_key->ipv4_dst, is_mask);
- attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4);
- }
-
- if (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) {
- const struct ovs_key_ipv6 *ipv6_key;
-
- ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
- if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
- OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n",
- ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
- return -EINVAL;
- }
- SW_FLOW_KEY_PUT(match, ipv6.label,
- ipv6_key->ipv6_label, is_mask);
- SW_FLOW_KEY_PUT(match, ip.proto,
- ipv6_key->ipv6_proto, is_mask);
- SW_FLOW_KEY_PUT(match, ip.tos,
- ipv6_key->ipv6_tclass, is_mask);
- SW_FLOW_KEY_PUT(match, ip.ttl,
- ipv6_key->ipv6_hlimit, is_mask);
- SW_FLOW_KEY_PUT(match, ip.frag,
- ipv6_key->ipv6_frag, is_mask);
- SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
- ipv6_key->ipv6_src,
- sizeof(match->key->ipv6.addr.src),
- is_mask);
- SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
- ipv6_key->ipv6_dst,
- sizeof(match->key->ipv6.addr.dst),
- is_mask);
-
- attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6);
- }
-
- if (attrs & (1ULL << OVS_KEY_ATTR_ARP)) {
- const struct ovs_key_arp *arp_key;
-
- arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
- if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
- OVS_NLERR("Unknown ARP opcode (opcode=%d).\n",
- arp_key->arp_op);
- return -EINVAL;
- }
-
- SW_FLOW_KEY_PUT(match, ipv4.addr.src,
- arp_key->arp_sip, is_mask);
- SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
- arp_key->arp_tip, is_mask);
- SW_FLOW_KEY_PUT(match, ip.proto,
- ntohs(arp_key->arp_op), is_mask);
- SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
- arp_key->arp_sha, ETH_ALEN, is_mask);
- SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
- arp_key->arp_tha, ETH_ALEN, is_mask);
-
- attrs &= ~(1ULL << OVS_KEY_ATTR_ARP);
- }
-
- if (attrs & (1ULL << OVS_KEY_ATTR_TCP)) {
- const struct ovs_key_tcp *tcp_key;
-
- tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
- if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
- SW_FLOW_KEY_PUT(match, ipv4.tp.src,
- tcp_key->tcp_src, is_mask);
- SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
- tcp_key->tcp_dst, is_mask);
- } else {
- SW_FLOW_KEY_PUT(match, ipv6.tp.src,
- tcp_key->tcp_src, is_mask);
- SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
- tcp_key->tcp_dst, is_mask);
- }
- attrs &= ~(1ULL << OVS_KEY_ATTR_TCP);
- }
-
- if (attrs & (1ULL << OVS_KEY_ATTR_UDP)) {
- const struct ovs_key_udp *udp_key;
-
- udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
- if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
- SW_FLOW_KEY_PUT(match, ipv4.tp.src,
- udp_key->udp_src, is_mask);
- SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
- udp_key->udp_dst, is_mask);
- } else {
- SW_FLOW_KEY_PUT(match, ipv6.tp.src,
- udp_key->udp_src, is_mask);
- SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
- udp_key->udp_dst, is_mask);
- }
- attrs &= ~(1ULL << OVS_KEY_ATTR_UDP);
- }
-
- if (attrs & (1ULL << OVS_KEY_ATTR_SCTP)) {
- const struct ovs_key_sctp *sctp_key;
-
- sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
- if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
- SW_FLOW_KEY_PUT(match, ipv4.tp.src,
- sctp_key->sctp_src, is_mask);
- SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
- sctp_key->sctp_dst, is_mask);
- } else {
- SW_FLOW_KEY_PUT(match, ipv6.tp.src,
- sctp_key->sctp_src, is_mask);
- SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
- sctp_key->sctp_dst, is_mask);
- }
- attrs &= ~(1ULL << OVS_KEY_ATTR_SCTP);
- }
-
- if (attrs & (1ULL << OVS_KEY_ATTR_ICMP)) {
- const struct ovs_key_icmp *icmp_key;
-
- icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
- SW_FLOW_KEY_PUT(match, ipv4.tp.src,
- htons(icmp_key->icmp_type), is_mask);
- SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
- htons(icmp_key->icmp_code), is_mask);
- attrs &= ~(1ULL << OVS_KEY_ATTR_ICMP);
- }
-
- if (attrs & (1ULL << OVS_KEY_ATTR_ICMPV6)) {
- const struct ovs_key_icmpv6 *icmpv6_key;
-
- icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
- SW_FLOW_KEY_PUT(match, ipv6.tp.src,
- htons(icmpv6_key->icmpv6_type), is_mask);
- SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
- htons(icmpv6_key->icmpv6_code), is_mask);
- attrs &= ~(1ULL << OVS_KEY_ATTR_ICMPV6);
- }
-
- if (attrs & (1ULL << OVS_KEY_ATTR_ND)) {
- const struct ovs_key_nd *nd_key;
-
- nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
- SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
- nd_key->nd_target,
- sizeof(match->key->ipv6.nd.target),
- is_mask);
- SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
- nd_key->nd_sll, ETH_ALEN, is_mask);
- SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
- nd_key->nd_tll, ETH_ALEN, is_mask);
- attrs &= ~(1ULL << OVS_KEY_ATTR_ND);
- }
-
- if (attrs != 0)
- return -EINVAL;
-
- return 0;
-}
-
-/**
- * ovs_match_from_nlattrs - parses Netlink attributes into a flow key and
- * mask. In case the 'mask' is NULL, the flow is treated as exact match
- * flow. Otherwise, it is treated as a wildcarded flow, except the mask
- * does not include any don't care bit.
- * @match: receives the extracted flow match information.
- * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
- * sequence. The fields should of the packet that triggered the creation
- * of this flow.
- * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
- * attribute specifies the mask field of the wildcarded flow.
- */
-int ovs_match_from_nlattrs(struct sw_flow_match *match,
- const struct nlattr *key,
- const struct nlattr *mask)
-{
- const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
- const struct nlattr *encap;
- u64 key_attrs = 0;
- u64 mask_attrs = 0;
- bool encap_valid = false;
- int err;
-
- err = parse_flow_nlattrs(key, a, &key_attrs);
- if (err)
- return err;
-
- if ((key_attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
- (key_attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) &&
- (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
- __be16 tci;
-
- if (!((key_attrs & (1ULL << OVS_KEY_ATTR_VLAN)) &&
- (key_attrs & (1ULL << OVS_KEY_ATTR_ENCAP)))) {
- OVS_NLERR("Invalid Vlan frame.\n");
- return -EINVAL;
- }
-
- key_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
- tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
- encap = a[OVS_KEY_ATTR_ENCAP];
- key_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP);
- encap_valid = true;
-
- if (tci & htons(VLAN_TAG_PRESENT)) {
- err = parse_flow_nlattrs(encap, a, &key_attrs);
- if (err)
- return err;
- } else if (!tci) {
- /* Corner case for truncated 802.1Q header. */
- if (nla_len(encap)) {
- OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n");
- return -EINVAL;
- }
- } else {
- OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n");
- return -EINVAL;
- }
- }
-
- err = ovs_key_from_nlattrs(match, key_attrs, a, false);
- if (err)
- return err;
-
- if (mask) {
- err = parse_flow_mask_nlattrs(mask, a, &mask_attrs);
- if (err)
- return err;
-
- if (mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) {
- __be16 eth_type = 0;
- __be16 tci = 0;
-
- if (!encap_valid) {
- OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n");
- return -EINVAL;
- }
-
- mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP);
- if (a[OVS_KEY_ATTR_ETHERTYPE])
- eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
-
- if (eth_type == htons(0xffff)) {
- mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
- encap = a[OVS_KEY_ATTR_ENCAP];
- err = parse_flow_mask_nlattrs(encap, a, &mask_attrs);
- } else {
- OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n",
- ntohs(eth_type));
- return -EINVAL;
- }
-
- if (a[OVS_KEY_ATTR_VLAN])
- tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
-
- if (!(tci & htons(VLAN_TAG_PRESENT))) {
- OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci));
- return -EINVAL;
- }
- }
-
- err = ovs_key_from_nlattrs(match, mask_attrs, a, true);
- if (err)
- return err;
- } else {
- /* Populate exact match flow's key mask. */
- if (match->mask)
- ovs_sw_flow_mask_set(match->mask, &match->range, 0xff);
- }
-
- if (!ovs_match_validate(match, key_attrs, mask_attrs))
- return -EINVAL;
-
- return 0;
-}
-
-/**
- * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key.
- * @flow: Receives extracted in_port, priority, tun_key and skb_mark.
- * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
- * sequence.
- *
- * This parses a series of Netlink attributes that form a flow key, which must
- * take the same form accepted by flow_from_nlattrs(), but only enough of it to
- * get the metadata, that is, the parts of the flow key that cannot be
- * extracted from the packet itself.
- */
-
-int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow,
- const struct nlattr *attr)
-{
- struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key;
- const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
- u64 attrs = 0;
- int err;
- struct sw_flow_match match;
-
- flow->key.phy.in_port = DP_MAX_PORTS;
- flow->key.phy.priority = 0;
- flow->key.phy.skb_mark = 0;
- memset(tun_key, 0, sizeof(flow->key.tun_key));
-
- err = parse_flow_nlattrs(attr, a, &attrs);
- if (err)
- return -EINVAL;
-
- memset(&match, 0, sizeof(match));
- match.key = &flow->key;
-
- err = metadata_from_nlattrs(&match, &attrs, a, false);
- if (err)
- return err;
-
- return 0;
-}
-
-int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey,
- const struct sw_flow_key *output, struct sk_buff *skb)
-{
- struct ovs_key_ethernet *eth_key;
- struct nlattr *nla, *encap;
- bool is_mask = (swkey != output);
-
- if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
- goto nla_put_failure;
-
- if ((swkey->tun_key.ipv4_dst || is_mask) &&
- ovs_ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key))
- goto nla_put_failure;
-
- if (swkey->phy.in_port == DP_MAX_PORTS) {
- if (is_mask && (output->phy.in_port == 0xffff))
- if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
- goto nla_put_failure;
- } else {
- u16 upper_u16;
- upper_u16 = !is_mask ? 0 : 0xffff;
-
- if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
- (upper_u16 << 16) | output->phy.in_port))
- goto nla_put_failure;
- }
-
- if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
- goto nla_put_failure;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
- if (!nla)
- goto nla_put_failure;
-
- eth_key = nla_data(nla);
- memcpy(eth_key->eth_src, output->eth.src, ETH_ALEN);
- memcpy(eth_key->eth_dst, output->eth.dst, ETH_ALEN);
-
- if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
- __be16 eth_type;
- eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
- if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
- nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
- goto nla_put_failure;
- encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
- if (!swkey->eth.tci)
- goto unencap;
- } else
- encap = NULL;
-
- if (swkey->eth.type == htons(ETH_P_802_2)) {
- /*
- * Ethertype 802.2 is represented in the netlink with omitted
- * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
- * 0xffff in the mask attribute. Ethertype can also
- * be wildcarded.
- */
- if (is_mask && output->eth.type)
- if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
- output->eth.type))
- goto nla_put_failure;
- goto unencap;
- }
-
- if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
- goto nla_put_failure;
-
- if (swkey->eth.type == htons(ETH_P_IP)) {
- struct ovs_key_ipv4 *ipv4_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
- if (!nla)
- goto nla_put_failure;
- ipv4_key = nla_data(nla);
- ipv4_key->ipv4_src = output->ipv4.addr.src;
- ipv4_key->ipv4_dst = output->ipv4.addr.dst;
- ipv4_key->ipv4_proto = output->ip.proto;
- ipv4_key->ipv4_tos = output->ip.tos;
- ipv4_key->ipv4_ttl = output->ip.ttl;
- ipv4_key->ipv4_frag = output->ip.frag;
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
- struct ovs_key_ipv6 *ipv6_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
- if (!nla)
- goto nla_put_failure;
- ipv6_key = nla_data(nla);
- memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
- sizeof(ipv6_key->ipv6_src));
- memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
- sizeof(ipv6_key->ipv6_dst));
- ipv6_key->ipv6_label = output->ipv6.label;
- ipv6_key->ipv6_proto = output->ip.proto;
- ipv6_key->ipv6_tclass = output->ip.tos;
- ipv6_key->ipv6_hlimit = output->ip.ttl;
- ipv6_key->ipv6_frag = output->ip.frag;
- } else if (swkey->eth.type == htons(ETH_P_ARP) ||
- swkey->eth.type == htons(ETH_P_RARP)) {
- struct ovs_key_arp *arp_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
- if (!nla)
- goto nla_put_failure;
- arp_key = nla_data(nla);
- memset(arp_key, 0, sizeof(struct ovs_key_arp));
- arp_key->arp_sip = output->ipv4.addr.src;
- arp_key->arp_tip = output->ipv4.addr.dst;
- arp_key->arp_op = htons(output->ip.proto);
- memcpy(arp_key->arp_sha, output->ipv4.arp.sha, ETH_ALEN);
- memcpy(arp_key->arp_tha, output->ipv4.arp.tha, ETH_ALEN);
- }
-
- if ((swkey->eth.type == htons(ETH_P_IP) ||
- swkey->eth.type == htons(ETH_P_IPV6)) &&
- swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
-
- if (swkey->ip.proto == IPPROTO_TCP) {
- struct ovs_key_tcp *tcp_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
- if (!nla)
- goto nla_put_failure;
- tcp_key = nla_data(nla);
- if (swkey->eth.type == htons(ETH_P_IP)) {
- tcp_key->tcp_src = output->ipv4.tp.src;
- tcp_key->tcp_dst = output->ipv4.tp.dst;
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
- tcp_key->tcp_src = output->ipv6.tp.src;
- tcp_key->tcp_dst = output->ipv6.tp.dst;
- }
- } else if (swkey->ip.proto == IPPROTO_UDP) {
- struct ovs_key_udp *udp_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
- if (!nla)
- goto nla_put_failure;
- udp_key = nla_data(nla);
- if (swkey->eth.type == htons(ETH_P_IP)) {
- udp_key->udp_src = output->ipv4.tp.src;
- udp_key->udp_dst = output->ipv4.tp.dst;
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
- udp_key->udp_src = output->ipv6.tp.src;
- udp_key->udp_dst = output->ipv6.tp.dst;
- }
- } else if (swkey->ip.proto == IPPROTO_SCTP) {
- struct ovs_key_sctp *sctp_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
- if (!nla)
- goto nla_put_failure;
- sctp_key = nla_data(nla);
- if (swkey->eth.type == htons(ETH_P_IP)) {
- sctp_key->sctp_src = swkey->ipv4.tp.src;
- sctp_key->sctp_dst = swkey->ipv4.tp.dst;
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
- sctp_key->sctp_src = swkey->ipv6.tp.src;
- sctp_key->sctp_dst = swkey->ipv6.tp.dst;
- }
- } else if (swkey->eth.type == htons(ETH_P_IP) &&
- swkey->ip.proto == IPPROTO_ICMP) {
- struct ovs_key_icmp *icmp_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
- if (!nla)
- goto nla_put_failure;
- icmp_key = nla_data(nla);
- icmp_key->icmp_type = ntohs(output->ipv4.tp.src);
- icmp_key->icmp_code = ntohs(output->ipv4.tp.dst);
- } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
- swkey->ip.proto == IPPROTO_ICMPV6) {
- struct ovs_key_icmpv6 *icmpv6_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
- sizeof(*icmpv6_key));
- if (!nla)
- goto nla_put_failure;
- icmpv6_key = nla_data(nla);
- icmpv6_key->icmpv6_type = ntohs(output->ipv6.tp.src);
- icmpv6_key->icmpv6_code = ntohs(output->ipv6.tp.dst);
-
- if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
- icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
- struct ovs_key_nd *nd_key;
-
- nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
- if (!nla)
- goto nla_put_failure;
- nd_key = nla_data(nla);
- memcpy(nd_key->nd_target, &output->ipv6.nd.target,
- sizeof(nd_key->nd_target));
- memcpy(nd_key->nd_sll, output->ipv6.nd.sll, ETH_ALEN);
- memcpy(nd_key->nd_tll, output->ipv6.nd.tll, ETH_ALEN);
- }
- }
- }
-
-unencap:
- if (encap)
- nla_nest_end(skb, encap);
-
- return 0;
-
-nla_put_failure:
- return -EMSGSIZE;
-}
-
-/* Initializes the flow module.
- * Returns zero if successful or a negative error code. */
-int ovs_flow_init(void)
-{
- BUILD_BUG_ON(__alignof__(struct sw_flow_key) % __alignof__(long));
- BUILD_BUG_ON(sizeof(struct sw_flow_key) % sizeof(long));
-
- flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0,
- 0, NULL);
- if (flow_cache == NULL)
- return -ENOMEM;
-
- return 0;
-}
-
-/* Uninitializes the flow module. */
-void ovs_flow_exit(void)
-{
- kmem_cache_destroy(flow_cache);
-}
-
-struct sw_flow_mask *ovs_sw_flow_mask_alloc(void)
-{
- struct sw_flow_mask *mask;
-
- mask = kmalloc(sizeof(*mask), GFP_KERNEL);
- if (mask)
- mask->ref_count = 0;
-
- return mask;
-}
-
-void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask)
-{
- mask->ref_count++;
-}
-
-static void rcu_free_sw_flow_mask_cb(struct rcu_head *rcu)
-{
- struct sw_flow_mask *mask = container_of(rcu, struct sw_flow_mask, rcu);
-
- kfree(mask);
-}
-
-void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred)
-{
- if (!mask)
- return;
-
- BUG_ON(!mask->ref_count);
- mask->ref_count--;
-
- if (!mask->ref_count) {
- list_del_rcu(&mask->list);
- if (deferred)
- call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb);
- else
- kfree(mask);
- }
-}
-
-static bool ovs_sw_flow_mask_equal(const struct sw_flow_mask *a,
- const struct sw_flow_mask *b)
-{
- u8 *a_ = (u8 *)&a->key + a->range.start;
- u8 *b_ = (u8 *)&b->key + b->range.start;
-
- return (a->range.end == b->range.end)
- && (a->range.start == b->range.start)
- && (memcmp(a_, b_, range_n_bytes(&a->range)) == 0);
-}
-
-struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl,
- const struct sw_flow_mask *mask)
-{
- struct list_head *ml;
-
- list_for_each(ml, tbl->mask_list) {
- struct sw_flow_mask *m;
- m = container_of(ml, struct sw_flow_mask, list);
- if (ovs_sw_flow_mask_equal(mask, m))
- return m;
- }
-
- return NULL;
-}
-
-/**
- * add a new mask into the mask list.
- * The caller needs to make sure that 'mask' is not the same
- * as any masks that are already on the list.
- */
-void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask)
-{
- list_add_rcu(&mask->list, tbl->mask_list);
-}
-
-/**
- * Set 'range' fields in the mask to the value of 'val'.
- */
-static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask,
- struct sw_flow_key_range *range, u8 val)
-{
- u8 *m = (u8 *)&mask->key + range->start;
-
- mask->range = *range;
- memset(m, val, range_n_bytes(range));
-}
diff --git a/datapath/flow.h b/datapath/flow.h
index 03eae03..91a3022 100644
--- a/datapath/flow.h
+++ b/datapath/flow.h
@@ -35,14 +35,6 @@
#include <net/ip_tunnels.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 \
@@ -129,6 +121,31 @@ 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];
@@ -146,20 +163,6 @@ 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 */
@@ -174,88 +177,9 @@ 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 */
diff --git a/datapath/flow.c b/datapath/flow_netlink.c
similarity index 55%
copy from datapath/flow.c
copy to datapath/flow_netlink.c
index 29122af..fc14b50 100644
--- a/datapath/flow.c
+++ b/datapath/flow_netlink.c
@@ -44,15 +44,10 @@
#include <net/ipv6.h>
#include <net/ndisc.h>
-#include "vlan.h"
-
-static struct kmem_cache *flow_cache;
-
-static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask,
- struct sw_flow_key_range *range, u8 val);
+#include "flow_netlink.h"
static void update_range__(struct sw_flow_match *match,
- size_t offset, size_t size, bool is_mask)
+ size_t offset, size_t size, bool is_mask)
{
struct sw_flow_key_range *range = NULL;
size_t start = rounddown(offset, sizeof(long));
@@ -108,24 +103,8 @@ static u16 range_n_bytes(const struct sw_flow_key_range *range)
return range->end - range->start;
}
-void ovs_match_init(struct sw_flow_match *match,
- struct sw_flow_key *key,
- struct sw_flow_mask *mask)
-{
- memset(match, 0, sizeof(*match));
- match->key = key;
- match->mask = mask;
-
- memset(key, 0, sizeof(*key));
-
- if (mask) {
- memset(&mask->key, 0, sizeof(mask->key));
- mask->range.start = mask->range.end = 0;
- }
-}
-
-static bool ovs_match_validate(const struct sw_flow_match *match,
- u64 key_attrs, u64 mask_attrs)
+static bool match_validate(const struct sw_flow_match *match,
+ u64 key_attrs, u64 mask_attrs)
{
u64 key_expected = 1ULL << OVS_KEY_ATTR_ETHERNET;
u64 mask_allowed = key_attrs; /* At most allow all key attributes */
@@ -244,899 +223,8 @@ static bool ovs_match_validate(const struct sw_flow_match *match,
return true;
}
-static int check_header(struct sk_buff *skb, int len)
-{
- if (unlikely(skb->len < len))
- return -EINVAL;
- if (unlikely(!pskb_may_pull(skb, len)))
- return -ENOMEM;
- return 0;
-}
-
-static bool arphdr_ok(struct sk_buff *skb)
-{
- return pskb_may_pull(skb, skb_network_offset(skb) +
- sizeof(struct arp_eth_header));
-}
-
-static int check_iphdr(struct sk_buff *skb)
-{
- unsigned int nh_ofs = skb_network_offset(skb);
- unsigned int ip_len;
- int err;
-
- err = check_header(skb, nh_ofs + sizeof(struct iphdr));
- if (unlikely(err))
- return err;
-
- ip_len = ip_hdrlen(skb);
- if (unlikely(ip_len < sizeof(struct iphdr) ||
- skb->len < nh_ofs + ip_len))
- return -EINVAL;
-
- skb_set_transport_header(skb, nh_ofs + ip_len);
- return 0;
-}
-
-static bool tcphdr_ok(struct sk_buff *skb)
-{
- int th_ofs = skb_transport_offset(skb);
- int tcp_len;
-
- if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr))))
- return false;
-
- tcp_len = tcp_hdrlen(skb);
- if (unlikely(tcp_len < sizeof(struct tcphdr) ||
- skb->len < th_ofs + tcp_len))
- return false;
-
- return true;
-}
-
-static bool udphdr_ok(struct sk_buff *skb)
-{
- return pskb_may_pull(skb, skb_transport_offset(skb) +
- sizeof(struct udphdr));
-}
-
-static bool sctphdr_ok(struct sk_buff *skb)
-{
- return pskb_may_pull(skb, skb_transport_offset(skb) +
- sizeof(struct sctphdr));
-}
-
-static bool icmphdr_ok(struct sk_buff *skb)
-{
- return pskb_may_pull(skb, skb_transport_offset(skb) +
- sizeof(struct icmphdr));
-}
-
-u64 ovs_flow_used_time(unsigned long flow_jiffies)
-{
- struct timespec cur_ts;
- u64 cur_ms, idle_ms;
-
- ktime_get_ts(&cur_ts);
- idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
- cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
- cur_ts.tv_nsec / NSEC_PER_MSEC;
-
- return cur_ms - idle_ms;
-}
-
-static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
-{
- unsigned int nh_ofs = skb_network_offset(skb);
- unsigned int nh_len;
- int payload_ofs;
- struct ipv6hdr *nh;
- uint8_t nexthdr;
- __be16 frag_off;
- int err;
-
- err = check_header(skb, nh_ofs + sizeof(*nh));
- if (unlikely(err))
- return err;
-
- nh = ipv6_hdr(skb);
- nexthdr = nh->nexthdr;
- payload_ofs = (u8 *)(nh + 1) - skb->data;
-
- key->ip.proto = NEXTHDR_NONE;
- key->ip.tos = ipv6_get_dsfield(nh);
- key->ip.ttl = nh->hop_limit;
- key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
- key->ipv6.addr.src = nh->saddr;
- key->ipv6.addr.dst = nh->daddr;
-
- payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off);
- if (unlikely(payload_ofs < 0))
- return -EINVAL;
-
- if (frag_off) {
- if (frag_off & htons(~0x7))
- key->ip.frag = OVS_FRAG_TYPE_LATER;
- else
- key->ip.frag = OVS_FRAG_TYPE_FIRST;
- }
-
- nh_len = payload_ofs - nh_ofs;
- skb_set_transport_header(skb, nh_ofs + nh_len);
- key->ip.proto = nexthdr;
- return nh_len;
-}
-
-static bool icmp6hdr_ok(struct sk_buff *skb)
-{
- return pskb_may_pull(skb, skb_transport_offset(skb) +
- sizeof(struct icmp6hdr));
-}
-
-void ovs_flow_key_mask(struct sw_flow_key *dst, const struct sw_flow_key *src,
- const struct sw_flow_mask *mask)
-{
- const long *m = (long *)((u8 *)&mask->key + mask->range.start);
- const long *s = (long *)((u8 *)src + mask->range.start);
- long *d = (long *)((u8 *)dst + mask->range.start);
- int i;
-
- /* The memory outside of the 'mask->range' are not set since
- * further operations on 'dst' only uses contents within
- * 'mask->range'.
- */
- for (i = 0; i < range_n_bytes(&mask->range); i += sizeof(long))
- *d++ = *s++ & *m++;
-}
-
-#define TCP_FLAGS_OFFSET 13
-#define TCP_FLAG_MASK 0x3f
-
-void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb)
-{
- u8 tcp_flags = 0;
-
- if ((flow->key.eth.type == htons(ETH_P_IP) ||
- flow->key.eth.type == htons(ETH_P_IPV6)) &&
- flow->key.ip.proto == IPPROTO_TCP &&
- likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
- u8 *tcp = (u8 *)tcp_hdr(skb);
- tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK;
- }
-
- spin_lock(&flow->lock);
- flow->used = jiffies;
- flow->packet_count++;
- flow->byte_count += skb->len;
- flow->tcp_flags |= tcp_flags;
- spin_unlock(&flow->lock);
-}
-
-struct sw_flow_actions *ovs_flow_actions_alloc(int size)
-{
- struct sw_flow_actions *sfa;
-
- if (size > MAX_ACTIONS_BUFSIZE)
- return ERR_PTR(-EINVAL);
-
- sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
- if (!sfa)
- return ERR_PTR(-ENOMEM);
-
- sfa->actions_len = 0;
- return sfa;
-}
-
-struct sw_flow *ovs_flow_alloc(void)
-{
- struct sw_flow *flow;
-
- flow = kmem_cache_alloc(flow_cache, GFP_KERNEL);
- if (!flow)
- return ERR_PTR(-ENOMEM);
-
- spin_lock_init(&flow->lock);
- flow->sf_acts = NULL;
- flow->mask = NULL;
-
- return flow;
-}
-
-static struct hlist_head *find_bucket(struct flow_table *table, u32 hash)
-{
- hash = jhash_1word(hash, table->hash_seed);
- return flex_array_get(table->buckets,
- (hash & (table->n_buckets - 1)));
-}
-
-static struct flex_array *alloc_buckets(unsigned int n_buckets)
-{
- struct flex_array *buckets;
- int i, err;
-
- buckets = flex_array_alloc(sizeof(struct hlist_head),
- n_buckets, GFP_KERNEL);
- if (!buckets)
- return NULL;
-
- err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL);
- if (err) {
- flex_array_free(buckets);
- return NULL;
- }
-
- for (i = 0; i < n_buckets; i++)
- INIT_HLIST_HEAD((struct hlist_head *)
- flex_array_get(buckets, i));
-
- return buckets;
-}
-
-static void free_buckets(struct flex_array *buckets)
-{
- flex_array_free(buckets);
-}
-
-static struct flow_table *__flow_tbl_alloc(int new_size)
-{
- struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL);
-
- if (!table)
- return NULL;
-
- table->buckets = alloc_buckets(new_size);
-
- if (!table->buckets) {
- kfree(table);
- return NULL;
- }
- table->n_buckets = new_size;
- table->count = 0;
- table->node_ver = 0;
- table->keep_flows = false;
- get_random_bytes(&table->hash_seed, sizeof(u32));
- table->mask_list = NULL;
-
- return table;
-}
-
-static void __flow_tbl_destroy(struct flow_table *table)
-{
- int i;
-
- if (table->keep_flows)
- goto skip_flows;
-
- for (i = 0; i < table->n_buckets; i++) {
- struct sw_flow *flow;
- struct hlist_head *head = flex_array_get(table->buckets, i);
- struct hlist_node *n;
- int ver = table->node_ver;
-
- hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) {
- hlist_del(&flow->hash_node[ver]);
- ovs_flow_free(flow, false);
- }
- }
-
- BUG_ON(!list_empty(table->mask_list));
- kfree(table->mask_list);
-
-skip_flows:
- free_buckets(table->buckets);
- kfree(table);
-}
-
-struct flow_table *ovs_flow_tbl_alloc(int new_size)
-{
- struct flow_table *table = __flow_tbl_alloc(new_size);
-
- if (!table)
- return NULL;
-
- table->mask_list = kmalloc(sizeof(struct list_head), GFP_KERNEL);
- if (!table->mask_list) {
- table->keep_flows = true;
- __flow_tbl_destroy(table);
- return NULL;
- }
- INIT_LIST_HEAD(table->mask_list);
-
- return table;
-}
-
-static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu)
-{
- struct flow_table *table = container_of(rcu, struct flow_table, rcu);
-
- __flow_tbl_destroy(table);
-}
-
-void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred)
-{
- if (!table)
- return;
-
- if (deferred)
- call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb);
- else
- __flow_tbl_destroy(table);
-}
-
-struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *last)
-{
- struct sw_flow *flow;
- struct hlist_head *head;
- int ver;
- int i;
-
- ver = table->node_ver;
- while (*bucket < table->n_buckets) {
- i = 0;
- head = flex_array_get(table->buckets, *bucket);
- hlist_for_each_entry_rcu(flow, head, hash_node[ver]) {
- if (i < *last) {
- i++;
- continue;
- }
- *last = i + 1;
- return flow;
- }
- (*bucket)++;
- *last = 0;
- }
-
- return NULL;
-}
-
-static void __tbl_insert(struct flow_table *table, struct sw_flow *flow)
-{
- struct hlist_head *head;
-
- head = find_bucket(table, flow->hash);
- hlist_add_head_rcu(&flow->hash_node[table->node_ver], head);
-
- table->count++;
-}
-
-static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new)
-{
- int old_ver;
- int i;
-
- old_ver = old->node_ver;
- new->node_ver = !old_ver;
-
- /* Insert in new table. */
- for (i = 0; i < old->n_buckets; i++) {
- struct sw_flow *flow;
- struct hlist_head *head;
-
- head = flex_array_get(old->buckets, i);
-
- hlist_for_each_entry(flow, head, hash_node[old_ver])
- __tbl_insert(new, flow);
- }
-
- new->mask_list = old->mask_list;
- old->keep_flows = true;
-}
-
-static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets)
-{
- struct flow_table *new_table;
-
- new_table = __flow_tbl_alloc(n_buckets);
- if (!new_table)
- return ERR_PTR(-ENOMEM);
-
- flow_table_copy_flows(table, new_table);
-
- return new_table;
-}
-
-struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table)
-{
- return __flow_tbl_rehash(table, table->n_buckets);
-}
-
-struct flow_table *ovs_flow_tbl_expand(struct flow_table *table)
-{
- return __flow_tbl_rehash(table, table->n_buckets * 2);
-}
-
-static void __flow_free(struct sw_flow *flow)
-{
- kfree((struct sf_flow_acts __force *)flow->sf_acts);
- kmem_cache_free(flow_cache, flow);
-}
-
-static void rcu_free_flow_callback(struct rcu_head *rcu)
-{
- struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
-
- __flow_free(flow);
-}
-
-void ovs_flow_free(struct sw_flow *flow, bool deferred)
-{
- if (!flow)
- return;
-
- ovs_sw_flow_mask_del_ref(flow->mask, deferred);
-
- if (deferred)
- call_rcu(&flow->rcu, rcu_free_flow_callback);
- else
- __flow_free(flow);
-}
-
-/* RCU callback used by ovs_flow_deferred_free_acts. */
-static void rcu_free_acts_callback(struct rcu_head *rcu)
-{
- struct sw_flow_actions *sf_acts = container_of(rcu,
- struct sw_flow_actions, rcu);
- kfree(sf_acts);
-}
-
-/* Schedules 'sf_acts' to be freed after the next RCU grace period.
- * The caller must hold rcu_read_lock for this to be sensible. */
-void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts)
-{
- call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
-}
-
-static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
-{
- struct qtag_prefix {
- __be16 eth_type; /* ETH_P_8021Q */
- __be16 tci;
- };
- struct qtag_prefix *qp;
-
- if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16)))
- return 0;
-
- if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) +
- sizeof(__be16))))
- return -ENOMEM;
-
- qp = (struct qtag_prefix *) skb->data;
- key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT);
- __skb_pull(skb, sizeof(struct qtag_prefix));
-
- return 0;
-}
-
-static __be16 parse_ethertype(struct sk_buff *skb)
-{
- struct llc_snap_hdr {
- u8 dsap; /* Always 0xAA */
- u8 ssap; /* Always 0xAA */
- u8 ctrl;
- u8 oui[3];
- __be16 ethertype;
- };
- struct llc_snap_hdr *llc;
- __be16 proto;
-
- proto = *(__be16 *) skb->data;
- __skb_pull(skb, sizeof(__be16));
-
- if (ntohs(proto) >= ETH_P_802_3_MIN)
- return proto;
-
- if (skb->len < sizeof(struct llc_snap_hdr))
- return htons(ETH_P_802_2);
-
- if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr))))
- return htons(0);
-
- llc = (struct llc_snap_hdr *) skb->data;
- if (llc->dsap != LLC_SAP_SNAP ||
- llc->ssap != LLC_SAP_SNAP ||
- (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0)
- return htons(ETH_P_802_2);
-
- __skb_pull(skb, sizeof(struct llc_snap_hdr));
-
- if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN)
- return llc->ethertype;
-
- return htons(ETH_P_802_2);
-}
-
-static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
- int nh_len)
-{
- struct icmp6hdr *icmp = icmp6_hdr(skb);
-
- /* The ICMPv6 type and code fields use the 16-bit transport port
- * fields, so we need to store them in 16-bit network byte order.
- */
- key->ipv6.tp.src = htons(icmp->icmp6_type);
- key->ipv6.tp.dst = htons(icmp->icmp6_code);
-
- if (icmp->icmp6_code == 0 &&
- (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||
- icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) {
- int icmp_len = skb->len - skb_transport_offset(skb);
- struct nd_msg *nd;
- int offset;
-
- /* In order to process neighbor discovery options, we need the
- * entire packet.
- */
- if (unlikely(icmp_len < sizeof(*nd)))
- return 0;
-
- if (unlikely(skb_linearize(skb)))
- return -ENOMEM;
-
- nd = (struct nd_msg *)skb_transport_header(skb);
- key->ipv6.nd.target = nd->target;
-
- icmp_len -= sizeof(*nd);
- offset = 0;
- while (icmp_len >= 8) {
- struct nd_opt_hdr *nd_opt =
- (struct nd_opt_hdr *)(nd->opt + offset);
- int opt_len = nd_opt->nd_opt_len * 8;
-
- if (unlikely(!opt_len || opt_len > icmp_len))
- return 0;
-
- /* Store the link layer address if the appropriate
- * option is provided. It is considered an error if
- * the same link layer option is specified twice.
- */
- if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR
- && opt_len == 8) {
- if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
- goto invalid;
- memcpy(key->ipv6.nd.sll,
- &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
- } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR
- && opt_len == 8) {
- if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
- goto invalid;
- memcpy(key->ipv6.nd.tll,
- &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
- }
-
- icmp_len -= opt_len;
- offset += opt_len;
- }
- }
-
- return 0;
-
-invalid:
- memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target));
- memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll));
- memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll));
-
- return 0;
-}
-
-/**
- * ovs_flow_extract - extracts a flow key from an Ethernet frame.
- * @skb: sk_buff that contains the frame, with skb->data pointing to the
- * Ethernet header
- * @in_port: port number on which @skb was received.
- * @key: output flow key
- *
- * The caller must ensure that skb->len >= ETH_HLEN.
- *
- * Returns 0 if successful, otherwise a negative errno value.
- *
- * Initializes @skb header pointers as follows:
- *
- * - skb->mac_header: the Ethernet header.
- *
- * - skb->network_header: just past the Ethernet header, or just past the
- * VLAN header, to the first byte of the Ethernet payload.
- *
- * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6
- * on output, then just past the IP header, if one is present and
- * of a correct length, otherwise the same as skb->network_header.
- * For other key->eth.type values it is left untouched.
- */
-int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
-{
- int error;
- struct ethhdr *eth;
-
- memset(key, 0, sizeof(*key));
-
- key->phy.priority = skb->priority;
- if (OVS_CB(skb)->tun_key)
- memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key));
- key->phy.in_port = in_port;
- key->phy.skb_mark = skb->mark;
-
- skb_reset_mac_header(skb);
-
- /* Link layer. We are guaranteed to have at least the 14 byte Ethernet
- * header in the linear data area.
- */
- eth = eth_hdr(skb);
- memcpy(key->eth.src, eth->h_source, ETH_ALEN);
- memcpy(key->eth.dst, eth->h_dest, ETH_ALEN);
-
- __skb_pull(skb, 2 * ETH_ALEN);
- /* We are going to push all headers that we pull, so no need to
- * update skb->csum here. */
-
- if (vlan_tx_tag_present(skb))
- key->eth.tci = htons(vlan_get_tci(skb));
- else if (eth->h_proto == htons(ETH_P_8021Q))
- if (unlikely(parse_vlan(skb, key)))
- return -ENOMEM;
-
- key->eth.type = parse_ethertype(skb);
- if (unlikely(key->eth.type == htons(0)))
- return -ENOMEM;
-
- skb_reset_network_header(skb);
- __skb_push(skb, skb->data - skb_mac_header(skb));
-
- /* Network layer. */
- if (key->eth.type == htons(ETH_P_IP)) {
- struct iphdr *nh;
- __be16 offset;
-
- error = check_iphdr(skb);
- if (unlikely(error)) {
- if (error == -EINVAL) {
- skb->transport_header = skb->network_header;
- error = 0;
- }
- return error;
- }
-
- nh = ip_hdr(skb);
- key->ipv4.addr.src = nh->saddr;
- key->ipv4.addr.dst = nh->daddr;
-
- key->ip.proto = nh->protocol;
- key->ip.tos = nh->tos;
- key->ip.ttl = nh->ttl;
-
- offset = nh->frag_off & htons(IP_OFFSET);
- if (offset) {
- key->ip.frag = OVS_FRAG_TYPE_LATER;
- return 0;
- }
- if (nh->frag_off & htons(IP_MF) ||
- skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
- key->ip.frag = OVS_FRAG_TYPE_FIRST;
-
- /* Transport layer. */
- if (key->ip.proto == IPPROTO_TCP) {
- if (tcphdr_ok(skb)) {
- struct tcphdr *tcp = tcp_hdr(skb);
- key->ipv4.tp.src = tcp->source;
- key->ipv4.tp.dst = tcp->dest;
- }
- } else if (key->ip.proto == IPPROTO_UDP) {
- if (udphdr_ok(skb)) {
- struct udphdr *udp = udp_hdr(skb);
- key->ipv4.tp.src = udp->source;
- key->ipv4.tp.dst = udp->dest;
- }
- } else if (key->ip.proto == IPPROTO_SCTP) {
- if (sctphdr_ok(skb)) {
- struct sctphdr *sctp = sctp_hdr(skb);
- key->ipv4.tp.src = sctp->source;
- key->ipv4.tp.dst = sctp->dest;
- }
- } else if (key->ip.proto == IPPROTO_ICMP) {
- if (icmphdr_ok(skb)) {
- struct icmphdr *icmp = icmp_hdr(skb);
- /* The ICMP type and code fields use the 16-bit
- * transport port fields, so we need to store
- * them in 16-bit network byte order. */
- key->ipv4.tp.src = htons(icmp->type);
- key->ipv4.tp.dst = htons(icmp->code);
- }
- }
-
- } else if ((key->eth.type == htons(ETH_P_ARP) ||
- key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) {
- struct arp_eth_header *arp;
-
- arp = (struct arp_eth_header *)skb_network_header(skb);
-
- if (arp->ar_hrd == htons(ARPHRD_ETHER)
- && arp->ar_pro == htons(ETH_P_IP)
- && arp->ar_hln == ETH_ALEN
- && arp->ar_pln == 4) {
-
- /* We only match on the lower 8 bits of the opcode. */
- if (ntohs(arp->ar_op) <= 0xff)
- key->ip.proto = ntohs(arp->ar_op);
- memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src));
- memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst));
- memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN);
- memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN);
- }
- } else if (key->eth.type == htons(ETH_P_IPV6)) {
- int nh_len; /* IPv6 Header + Extensions */
-
- nh_len = parse_ipv6hdr(skb, key);
- if (unlikely(nh_len < 0)) {
- if (nh_len == -EINVAL) {
- skb->transport_header = skb->network_header;
- error = 0;
- } else {
- error = nh_len;
- }
- return error;
- }
-
- if (key->ip.frag == OVS_FRAG_TYPE_LATER)
- return 0;
- if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
- key->ip.frag = OVS_FRAG_TYPE_FIRST;
-
- /* Transport layer. */
- if (key->ip.proto == NEXTHDR_TCP) {
- if (tcphdr_ok(skb)) {
- struct tcphdr *tcp = tcp_hdr(skb);
- key->ipv6.tp.src = tcp->source;
- key->ipv6.tp.dst = tcp->dest;
- }
- } else if (key->ip.proto == NEXTHDR_UDP) {
- if (udphdr_ok(skb)) {
- struct udphdr *udp = udp_hdr(skb);
- key->ipv6.tp.src = udp->source;
- key->ipv6.tp.dst = udp->dest;
- }
- } else if (key->ip.proto == NEXTHDR_SCTP) {
- if (sctphdr_ok(skb)) {
- struct sctphdr *sctp = sctp_hdr(skb);
- key->ipv6.tp.src = sctp->source;
- key->ipv6.tp.dst = sctp->dest;
- }
- } else if (key->ip.proto == NEXTHDR_ICMP) {
- if (icmp6hdr_ok(skb)) {
- error = parse_icmpv6(skb, key, nh_len);
- if (error)
- return error;
- }
- }
- }
-
- return 0;
-}
-
-static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start,
- int key_end)
-{
- u32 *hash_key = (u32 *)((u8 *)key + key_start);
- int hash_u32s = (key_end - key_start) >> 2;
-
- /* Make sure number of hash bytes are multiple of u32. */
- BUILD_BUG_ON(sizeof(long) % sizeof(u32));
-
- return jhash2(hash_key, hash_u32s, 0);
-}
-
-static int flow_key_start(const struct sw_flow_key *key)
-{
- if (key->tun_key.ipv4_dst)
- return 0;
- else
- return rounddown(offsetof(struct sw_flow_key, phy),
- sizeof(long));
-}
-
-static bool __cmp_key(const struct sw_flow_key *key1,
- const struct sw_flow_key *key2, int key_start, int key_end)
-{
- const long *cp1 = (long *)((u8 *)key1 + key_start);
- const long *cp2 = (long *)((u8 *)key2 + key_start);
- long diffs = 0;
- int i;
-
- for (i = key_start; i < key_end; i += sizeof(long))
- diffs |= *cp1++ ^ *cp2++;
-
- return diffs == 0;
-}
-
-static bool __flow_cmp_masked_key(const struct sw_flow *flow,
- const struct sw_flow_key *key, int key_start, int key_end)
-{
- return __cmp_key(&flow->key, key, key_start, key_end);
-}
-
-static bool __flow_cmp_unmasked_key(const struct sw_flow *flow,
- const struct sw_flow_key *key, int key_start, int key_end)
-{
- return __cmp_key(&flow->unmasked_key, key, key_start, key_end);
-}
-
-bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
- const struct sw_flow_key *key, int key_end)
-{
- int key_start;
- key_start = flow_key_start(key);
-
- return __flow_cmp_unmasked_key(flow, key, key_start, key_end);
-
-}
-
-struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table,
- struct sw_flow_match *match)
-{
- struct sw_flow_key *unmasked = match->key;
- int key_end = match->range.end;
- struct sw_flow *flow;
-
- flow = ovs_flow_lookup(table, unmasked);
- if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_end)))
- flow = NULL;
-
- return flow;
-}
-
-static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table,
- const struct sw_flow_key *unmasked,
- struct sw_flow_mask *mask)
-{
- struct sw_flow *flow;
- struct hlist_head *head;
- int key_start = mask->range.start;
- int key_end = mask->range.end;
- u32 hash;
- struct sw_flow_key masked_key;
-
- ovs_flow_key_mask(&masked_key, unmasked, mask);
- hash = ovs_flow_hash(&masked_key, key_start, key_end);
- head = find_bucket(table, hash);
- hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) {
- if (flow->mask == mask &&
- __flow_cmp_masked_key(flow, &masked_key,
- key_start, key_end))
- return flow;
- }
- return NULL;
-}
-
-struct sw_flow *ovs_flow_lookup(struct flow_table *tbl,
- const struct sw_flow_key *key)
-{
- struct sw_flow *flow = NULL;
- struct sw_flow_mask *mask;
-
- list_for_each_entry_rcu(mask, tbl->mask_list, list) {
- flow = ovs_masked_flow_lookup(tbl, key, mask);
- if (flow) /* Found */
- break;
- }
-
- return flow;
-}
-
-
-void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow)
-{
- flow->hash = ovs_flow_hash(&flow->key, flow->mask->range.start,
- flow->mask->range.end);
- __tbl_insert(table, flow);
-}
-
-void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow)
-{
- BUG_ON(table->count == 0);
- hlist_del_rcu(&flow->hash_node[table->node_ver]);
- table->count--;
-}
-
/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
-const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
+static const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
[OVS_KEY_ATTR_ENCAP] = -1,
[OVS_KEY_ATTR_PRIORITY] = sizeof(u32),
[OVS_KEY_ATTR_IN_PORT] = sizeof(u32),
@@ -1171,8 +259,8 @@ static bool is_all_zero(const u8 *fp, size_t size)
}
static int __parse_flow_nlattrs(const struct nlattr *attr,
- const struct nlattr *a[],
- u64 *attrsp, bool nz)
+ const struct nlattr *a[],
+ u64 *attrsp, bool nz)
{
const struct nlattr *nla;
u64 attrs;
@@ -1217,7 +305,7 @@ static int __parse_flow_nlattrs(const struct nlattr *attr,
}
static int parse_flow_mask_nlattrs(const struct nlattr *attr,
- const struct nlattr *a[], u64 *attrsp)
+ const struct nlattr *a[], u64 *attrsp)
{
return __parse_flow_nlattrs(attr, a, attrsp, true);
}
@@ -1228,8 +316,8 @@ static int parse_flow_nlattrs(const struct nlattr *attr,
return __parse_flow_nlattrs(attr, a, attrsp, false);
}
-int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr,
- struct sw_flow_match *match, bool is_mask)
+static int ipv4_tun_from_nlattr(const struct nlattr *attr,
+ struct sw_flow_match *match, bool is_mask)
{
struct nlattr *a;
int rem;
@@ -1317,9 +405,9 @@ int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr,
return 0;
}
-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)
+static int ipv4_tun_to_nlattr(struct sk_buff *skb,
+ const struct ovs_key_ipv4_tunnel *tun_key,
+ const struct ovs_key_ipv4_tunnel *output)
{
struct nlattr *nla;
@@ -1354,7 +442,7 @@ int ovs_ipv4_tun_to_nlattr(struct sk_buff *skb,
static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
- const struct nlattr **a, bool is_mask)
+ const struct nlattr **a, bool is_mask)
{
if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) {
SW_FLOW_KEY_PUT(match, phy.priority,
@@ -1383,8 +471,8 @@ static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
*attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK);
}
if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) {
- if (ovs_ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
- is_mask))
+ if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
+ is_mask))
return -EINVAL;
*attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL);
}
@@ -1392,7 +480,7 @@ static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
}
static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
- const struct nlattr **a, bool is_mask)
+ const struct nlattr **a, bool is_mask)
{
int err;
u64 orig_attrs = attrs;
@@ -1625,8 +713,17 @@ static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
return 0;
}
+static void sw_flow_mask_set(struct sw_flow_mask *mask,
+ struct sw_flow_key_range *range, u8 val)
+{
+ u8 *m = (u8 *)&mask->key + range->start;
+
+ mask->range = *range;
+ memset(m, val, range_n_bytes(range));
+}
+
/**
- * ovs_match_from_nlattrs - parses Netlink attributes into a flow key and
+ * ovs_nla_get_match - parses Netlink attributes into a flow key and
* mask. In case the 'mask' is NULL, the flow is treated as exact match
* flow. Otherwise, it is treated as a wildcarded flow, except the mask
* does not include any don't care bit.
@@ -1637,9 +734,9 @@ static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
* @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
* attribute specifies the mask field of the wildcarded flow.
*/
-int ovs_match_from_nlattrs(struct sw_flow_match *match,
- const struct nlattr *key,
- const struct nlattr *mask)
+int ovs_nla_get_match(struct sw_flow_match *match,
+ const struct nlattr *key,
+ const struct nlattr *mask)
{
const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
const struct nlattr *encap;
@@ -1732,17 +829,17 @@ int ovs_match_from_nlattrs(struct sw_flow_match *match,
} else {
/* Populate exact match flow's key mask. */
if (match->mask)
- ovs_sw_flow_mask_set(match->mask, &match->range, 0xff);
+ sw_flow_mask_set(match->mask, &match->range, 0xff);
}
- if (!ovs_match_validate(match, key_attrs, mask_attrs))
+ if (!match_validate(match, key_attrs, mask_attrs))
return -EINVAL;
return 0;
}
/**
- * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key.
+ * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
* @flow: Receives extracted in_port, priority, tun_key and skb_mark.
* @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
* sequence.
@@ -1753,8 +850,8 @@ int ovs_match_from_nlattrs(struct sw_flow_match *match,
* extracted from the packet itself.
*/
-int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow,
- const struct nlattr *attr)
+int ovs_nla_get_flow_metadata(struct sw_flow *flow,
+ const struct nlattr *attr)
{
struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key;
const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
@@ -1781,8 +878,8 @@ int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow,
return 0;
}
-int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey,
- const struct sw_flow_key *output, struct sk_buff *skb)
+int ovs_nla_put_flow(const struct sw_flow_key *swkey,
+ const struct sw_flow_key *output, struct sk_buff *skb)
{
struct ovs_key_ethernet *eth_key;
struct nlattr *nla, *encap;
@@ -1792,7 +889,7 @@ int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey,
goto nla_put_failure;
if ((swkey->tun_key.ipv4_dst || is_mask) &&
- ovs_ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key))
+ ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key))
goto nla_put_failure;
if (swkey->phy.in_port == DP_MAX_PORTS) {
@@ -1987,111 +1084,504 @@ nla_put_failure:
return -EMSGSIZE;
}
-/* Initializes the flow module.
- * Returns zero if successful or a negative error code. */
-int ovs_flow_init(void)
+#define MAX_ACTIONS_BUFSIZE (32 * 1024)
+
+struct sw_flow_actions *ovs_nla_alloc_flow_actions(int size)
{
- BUILD_BUG_ON(__alignof__(struct sw_flow_key) % __alignof__(long));
- BUILD_BUG_ON(sizeof(struct sw_flow_key) % sizeof(long));
+ struct sw_flow_actions *sfa;
- flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0,
- 0, NULL);
- if (flow_cache == NULL)
- return -ENOMEM;
+ if (size > MAX_ACTIONS_BUFSIZE)
+ return ERR_PTR(-EINVAL);
+
+ sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
+ if (!sfa)
+ return ERR_PTR(-ENOMEM);
+
+ sfa->actions_len = 0;
+ return sfa;
+}
+
+/* RCU callback used by ovs_nla_free_flow_actions. */
+static void rcu_free_acts_callback(struct rcu_head *rcu)
+{
+ struct sw_flow_actions *sf_acts = container_of(rcu,
+ struct sw_flow_actions, rcu);
+ kfree(sf_acts);
+}
+
+/* Schedules 'sf_acts' to be freed after the next RCU grace period.
+ * The caller must hold rcu_read_lock for this to be sensible. */
+void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
+{
+ call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
+}
+
+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_nla_alloc_flow_actions(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;
}
-/* Uninitializes the flow module. */
-void ovs_flow_exit(void)
+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)
{
- kmem_cache_destroy(flow_cache);
+ struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
+ st_offset);
+
+ a->nla_len = sfa->actions_len - st_offset;
}
-struct sw_flow_mask *ovs_sw_flow_mask_alloc(void)
+static int validate_and_copy_sample(const struct nlattr *attr,
+ const struct sw_flow_key *key, int depth,
+ struct sw_flow_actions **sfa)
{
- struct sw_flow_mask *mask;
+ 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;
- mask = kmalloc(sizeof(*mask), GFP_KERNEL);
- if (mask)
- mask->ref_count = 0;
+ 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;
- return mask;
+ /* 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 = ovs_nla_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;
}
-void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask)
+static int validate_tp_port(const struct sw_flow_key *flow_key)
{
- mask->ref_count++;
+ 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 void rcu_free_sw_flow_mask_cb(struct rcu_head *rcu)
+static int validate_and_copy_set_tun(const struct nlattr *attr,
+ struct sw_flow_actions **sfa)
{
- struct sw_flow_mask *mask = container_of(rcu, struct sw_flow_mask, rcu);
+ struct sw_flow_match match;
+ struct sw_flow_key key;
+ int err, start;
- kfree(mask);
+ ovs_match_init(&match, &key, NULL);
+ err = 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;
}
-void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred)
+static int validate_set(const struct nlattr *a,
+ const struct sw_flow_key *flow_key,
+ struct sw_flow_actions **sfa,
+ bool *set_tun)
{
- if (!mask)
- return;
+ const struct nlattr *ovs_key = nla_data(a);
+ int key_type = nla_type(ovs_key);
- BUG_ON(!mask->ref_count);
- mask->ref_count--;
+ /* There can be only one key in a action */
+ if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
+ return -EINVAL;
- if (!mask->ref_count) {
- list_del_rcu(&mask->list);
- if (deferred)
- call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb);
- else
- kfree(mask);
+ 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 bool ovs_sw_flow_mask_equal(const struct sw_flow_mask *a,
- const struct sw_flow_mask *b)
+static int copy_action(const struct nlattr *from,
+ struct sw_flow_actions **sfa)
{
- u8 *a_ = (u8 *)&a->key + a->range.start;
- u8 *b_ = (u8 *)&b->key + b->range.start;
+ 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;
+}
+
+int ovs_nla_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;
- return (a->range.end == b->range.end)
- && (a->range.start == b->range.start)
- && (memcmp(a_, b_, range_n_bytes(&a->range)) == 0);
+ 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;
}
-struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl,
- const struct sw_flow_mask *mask)
+static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
{
- struct list_head *ml;
+ 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;
- list_for_each(ml, tbl->mask_list) {
- struct sw_flow_mask *m;
- m = container_of(ml, struct sw_flow_mask, list);
- if (ovs_sw_flow_mask_equal(mask, m))
- return m;
+ 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 = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
+ if (err)
+ return err;
+ nla_nest_end(skb, st_sample);
+ break;
+ }
}
- return NULL;
+ nla_nest_end(skb, start);
+ return err;
}
-/**
- * add a new mask into the mask list.
- * The caller needs to make sure that 'mask' is not the same
- * as any masks that are already on the list.
- */
-void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask)
+static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
{
- list_add_rcu(&mask->list, tbl->mask_list);
+ 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 = 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;
}
-/**
- * Set 'range' fields in the mask to the value of 'val'.
- */
-static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask,
- struct sw_flow_key_range *range, u8 val)
+int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
{
- u8 *m = (u8 *)&mask->key + range->start;
+ const struct nlattr *a;
+ int rem, err;
- mask->range = *range;
- memset(m, val, range_n_bytes(range));
+ 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;
}
diff --git a/datapath/flow_netlink.h b/datapath/flow_netlink.h
new file mode 100644
index 0000000..44c65c7
--- /dev/null
+++ b/datapath/flow_netlink.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2007-2013 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+
+#ifndef FLOW_NETLINK_H
+#define FLOW_NETLINK_H 1
+
+#include <linux/kernel.h>
+#include <linux/netlink.h>
+#include <linux/openvswitch.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/rcupdate.h>
+#include <linux/if_ether.h>
+#include <linux/in6.h>
+#include <linux/jiffies.h>
+#include <linux/time.h>
+#include <linux/flex_array.h>
+
+#include <net/inet_ecn.h>
+#include <net/ip_tunnels.h>
+
+#include "flow.h"
+
+int ovs_nla_put_flow(const struct sw_flow_key *,
+ const struct sw_flow_key *, struct sk_buff *);
+int ovs_nla_get_flow_metadata(struct sw_flow *flow,
+ const struct nlattr *attr);
+int ovs_nla_get_match(struct sw_flow_match *match,
+ const struct nlattr *,
+ const struct nlattr *);
+
+int ovs_nla_copy_actions(const struct nlattr *attr,
+ const struct sw_flow_key *key, int depth,
+ struct sw_flow_actions **sfa);
+int ovs_nla_put_actions(const struct nlattr *attr,
+ int len, struct sk_buff *skb);
+
+struct sw_flow_actions *ovs_nla_alloc_flow_actions(int actions_len);
+void ovs_nla_free_flow_actions(struct sw_flow_actions *);
+
+#endif /* flow_netlink.h */
diff --git a/datapath/flow_table.c b/datapath/flow_table.c
new file mode 100644
index 0000000..e077376
--- /dev/null
+++ b/datapath/flow_table.c
@@ -0,0 +1,535 @@
+/*
+ * Copyright (c) 2007-2013 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include "flow.h"
+#include "datapath.h"
+#include <linux/uaccess.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <net/llc_pdu.h>
+#include <linux/kernel.h>
+#include <linux/jhash.h>
+#include <linux/jiffies.h>
+#include <linux/llc.h>
+#include <linux/module.h>
+#include <linux/in.h>
+#include <linux/rcupdate.h>
+#include <linux/if_arp.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/sctp.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/icmp.h>
+#include <linux/icmpv6.h>
+#include <linux/rculist.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/ndisc.h>
+
+#include "vlan.h"
+
+static struct kmem_cache *flow_cache;
+
+void ovs_match_init(struct sw_flow_match *match,
+ struct sw_flow_key *key,
+ struct sw_flow_mask *mask)
+{
+ memset(match, 0, sizeof(*match));
+ match->key = key;
+ match->mask = mask;
+
+ memset(key, 0, sizeof(*key));
+
+ if (mask) {
+ memset(&mask->key, 0, sizeof(mask->key));
+ mask->range.start = mask->range.end = 0;
+ }
+}
+
+static u16 range_n_bytes(const struct sw_flow_key_range *range)
+{
+ return range->end - range->start;
+}
+
+void ovs_flow_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
+ const struct sw_flow_mask *mask)
+{
+ const long *m = (long *)((u8 *)&mask->key + mask->range.start);
+ const long *s = (long *)((u8 *)src + mask->range.start);
+ long *d = (long *)((u8 *)dst + mask->range.start);
+ int i;
+
+ /* The memory outside of the 'mask->range' are not set since
+ * further operations on 'dst' only uses contents within
+ * 'mask->range'.
+ */
+ for (i = 0; i < range_n_bytes(&mask->range); i += sizeof(long))
+ *d++ = *s++ & *m++;
+}
+
+struct sw_flow *ovs_flow_alloc(void)
+{
+ struct sw_flow *flow;
+
+ flow = kmem_cache_alloc(flow_cache, GFP_KERNEL);
+ if (!flow)
+ return ERR_PTR(-ENOMEM);
+
+ spin_lock_init(&flow->lock);
+ flow->sf_acts = NULL;
+ flow->mask = NULL;
+
+ return flow;
+}
+
+static struct flex_array *alloc_buckets(unsigned int n_buckets)
+{
+ struct flex_array *buckets;
+ int i, err;
+
+ buckets = flex_array_alloc(sizeof(struct hlist_head),
+ n_buckets, GFP_KERNEL);
+ if (!buckets)
+ return NULL;
+
+ err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL);
+ if (err) {
+ flex_array_free(buckets);
+ return NULL;
+ }
+
+ for (i = 0; i < n_buckets; i++)
+ INIT_HLIST_HEAD((struct hlist_head *)
+ flex_array_get(buckets, i));
+
+ return buckets;
+}
+
+static void flow_free(struct sw_flow *flow)
+{
+ kfree((struct sf_flow_acts __force *)flow->sf_acts);
+ kmem_cache_free(flow_cache, flow);
+}
+
+static void rcu_free_flow_callback(struct rcu_head *rcu)
+{
+ struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
+
+ flow_free(flow);
+}
+
+void ovs_flow_free(struct sw_flow *flow, bool deferred)
+{
+ if (!flow)
+ return;
+
+ ovs_sw_flow_mask_del_ref(flow->mask, deferred);
+
+ if (deferred)
+ call_rcu(&flow->rcu, rcu_free_flow_callback);
+ else
+ flow_free(flow);
+}
+
+static void free_buckets(struct flex_array *buckets)
+{
+ flex_array_free(buckets);
+}
+
+static void __flow_tbl_destroy(struct flow_table *table)
+{
+ int i;
+
+ if (table->keep_flows)
+ goto skip_flows;
+
+ for (i = 0; i < table->n_buckets; i++) {
+ struct sw_flow *flow;
+ struct hlist_head *head = flex_array_get(table->buckets, i);
+ struct hlist_node *n;
+ int ver = table->node_ver;
+
+ hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) {
+ hlist_del(&flow->hash_node[ver]);
+ ovs_flow_free(flow, false);
+ }
+ }
+
+ BUG_ON(!list_empty(table->mask_list));
+ kfree(table->mask_list);
+
+skip_flows:
+ free_buckets(table->buckets);
+ kfree(table);
+}
+
+static struct flow_table *__flow_tbl_alloc(int new_size)
+{
+ struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL);
+
+ if (!table)
+ return NULL;
+
+ table->buckets = alloc_buckets(new_size);
+
+ if (!table->buckets) {
+ kfree(table);
+ return NULL;
+ }
+ table->n_buckets = new_size;
+ table->count = 0;
+ table->node_ver = 0;
+ table->keep_flows = false;
+ get_random_bytes(&table->hash_seed, sizeof(u32));
+ table->mask_list = NULL;
+
+ return table;
+}
+
+struct flow_table *ovs_flow_tbl_alloc(int new_size)
+{
+ struct flow_table *table = __flow_tbl_alloc(new_size);
+
+ if (!table)
+ return NULL;
+
+ table->mask_list = kmalloc(sizeof(struct list_head), GFP_KERNEL);
+ if (!table->mask_list) {
+ table->keep_flows = true;
+ __flow_tbl_destroy(table);
+ return NULL;
+ }
+ INIT_LIST_HEAD(table->mask_list);
+
+ return table;
+}
+
+static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu)
+{
+ struct flow_table *table = container_of(rcu, struct flow_table, rcu);
+
+ __flow_tbl_destroy(table);
+}
+
+void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred)
+{
+ if (!table)
+ return;
+
+ if (deferred)
+ call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb);
+ else
+ __flow_tbl_destroy(table);
+}
+
+struct sw_flow *ovs_flow_tbl_dump_next(struct flow_table *table,
+ u32 *bucket, u32 *last)
+{
+ struct sw_flow *flow;
+ struct hlist_head *head;
+ int ver;
+ int i;
+
+ ver = table->node_ver;
+ while (*bucket < table->n_buckets) {
+ i = 0;
+ head = flex_array_get(table->buckets, *bucket);
+ hlist_for_each_entry_rcu(flow, head, hash_node[ver]) {
+ if (i < *last) {
+ i++;
+ continue;
+ }
+ *last = i + 1;
+ return flow;
+ }
+ (*bucket)++;
+ *last = 0;
+ }
+
+ return NULL;
+}
+
+static struct hlist_head *find_bucket(struct flow_table *table, u32 hash)
+{
+ hash = jhash_1word(hash, table->hash_seed);
+ return flex_array_get(table->buckets,
+ (hash & (table->n_buckets - 1)));
+}
+
+static void __tbl_insert(struct flow_table *table, struct sw_flow *flow)
+{
+ struct hlist_head *head;
+
+ head = find_bucket(table, flow->hash);
+ hlist_add_head_rcu(&flow->hash_node[table->node_ver], head);
+
+ table->count++;
+}
+
+static void flow_table_copy_flows(struct flow_table *old,
+ struct flow_table *new)
+{
+ int old_ver;
+ int i;
+
+ old_ver = old->node_ver;
+ new->node_ver = !old_ver;
+
+ /* Insert in new table. */
+ for (i = 0; i < old->n_buckets; i++) {
+ struct sw_flow *flow;
+ struct hlist_head *head;
+
+ head = flex_array_get(old->buckets, i);
+
+ hlist_for_each_entry(flow, head, hash_node[old_ver])
+ __tbl_insert(new, flow);
+ }
+
+ new->mask_list = old->mask_list;
+ old->keep_flows = true;
+}
+
+static struct flow_table *__flow_tbl_rehash(struct flow_table *table,
+ int n_buckets)
+{
+ struct flow_table *new_table;
+
+ new_table = __flow_tbl_alloc(n_buckets);
+ if (!new_table)
+ return ERR_PTR(-ENOMEM);
+
+ flow_table_copy_flows(table, new_table);
+
+ return new_table;
+}
+
+struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table)
+{
+ return __flow_tbl_rehash(table, table->n_buckets);
+}
+
+struct flow_table *ovs_flow_tbl_expand(struct flow_table *table)
+{
+ return __flow_tbl_rehash(table, table->n_buckets * 2);
+}
+
+static u32 flow_hash(const struct sw_flow_key *key, int key_start,
+ int key_end)
+{
+ u32 *hash_key = (u32 *)((u8 *)key + key_start);
+ int hash_u32s = (key_end - key_start) >> 2;
+
+ /* Make sure number of hash bytes are multiple of u32. */
+ BUILD_BUG_ON(sizeof(long) % sizeof(u32));
+
+ return jhash2(hash_key, hash_u32s, 0);
+}
+
+static int flow_key_start(const struct sw_flow_key *key)
+{
+ if (key->tun_key.ipv4_dst)
+ return 0;
+ else
+ return rounddown(offsetof(struct sw_flow_key, phy),
+ sizeof(long));
+}
+
+static bool cmp_key(const struct sw_flow_key *key1,
+ const struct sw_flow_key *key2,
+ int key_start, int key_end)
+{
+ const long *cp1 = (long *)((u8 *)key1 + key_start);
+ const long *cp2 = (long *)((u8 *)key2 + key_start);
+ long diffs = 0;
+ int i;
+
+ for (i = key_start; i < key_end; i += sizeof(long))
+ diffs |= *cp1++ ^ *cp2++;
+
+ return diffs == 0;
+}
+
+static bool flow_cmp_masked_key(const struct sw_flow *flow,
+ const struct sw_flow_key *key,
+ int key_start, int key_end)
+{
+ return cmp_key(&flow->key, key, key_start, key_end);
+}
+
+bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
+ struct sw_flow_match *match)
+{
+ struct sw_flow_key *key = match->key;
+ int key_start = flow_key_start(key);
+ int key_end = match->range.end;
+
+ return cmp_key(&flow->unmasked_key, key, key_start, key_end);
+}
+
+static struct sw_flow *masked_flow_lookup(struct flow_table *table,
+ const struct sw_flow_key *unmasked,
+ struct sw_flow_mask *mask)
+{
+ struct sw_flow *flow;
+ struct hlist_head *head;
+ int key_start = mask->range.start;
+ int key_end = mask->range.end;
+ u32 hash;
+ struct sw_flow_key masked_key;
+
+ ovs_flow_mask_key(&masked_key, unmasked, mask);
+ hash = flow_hash(&masked_key, key_start, key_end);
+ head = find_bucket(table, hash);
+ hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) {
+ if (flow->mask == mask &&
+ flow_cmp_masked_key(flow, &masked_key,
+ key_start, key_end))
+ return flow;
+ }
+ return NULL;
+}
+
+struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *tbl,
+ const struct sw_flow_key *key)
+{
+ struct sw_flow *flow = NULL;
+ struct sw_flow_mask *mask;
+
+ list_for_each_entry_rcu(mask, tbl->mask_list, list) {
+ flow = masked_flow_lookup(tbl, key, mask);
+ if (flow) /* Found */
+ break;
+ }
+
+ return flow;
+}
+
+void ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow)
+{
+ flow->hash = flow_hash(&flow->key, flow->mask->range.start,
+ flow->mask->range.end);
+ __tbl_insert(table, flow);
+}
+
+void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow)
+{
+ BUG_ON(table->count == 0);
+ hlist_del_rcu(&flow->hash_node[table->node_ver]);
+ table->count--;
+}
+
+struct sw_flow_mask *ovs_sw_flow_mask_alloc(void)
+{
+ struct sw_flow_mask *mask;
+
+ mask = kmalloc(sizeof(*mask), GFP_KERNEL);
+ if (mask)
+ mask->ref_count = 0;
+
+ return mask;
+}
+
+void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask)
+{
+ mask->ref_count++;
+}
+
+static void rcu_free_sw_flow_mask_cb(struct rcu_head *rcu)
+{
+ struct sw_flow_mask *mask = container_of(rcu, struct sw_flow_mask, rcu);
+
+ kfree(mask);
+}
+
+void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred)
+{
+ if (!mask)
+ return;
+
+ BUG_ON(!mask->ref_count);
+ mask->ref_count--;
+
+ if (!mask->ref_count) {
+ list_del_rcu(&mask->list);
+ if (deferred)
+ call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb);
+ else
+ kfree(mask);
+ }
+}
+
+static bool mask_equal(const struct sw_flow_mask *a,
+ const struct sw_flow_mask *b)
+{
+ u8 *a_ = (u8 *)&a->key + a->range.start;
+ u8 *b_ = (u8 *)&b->key + b->range.start;
+
+ return (a->range.end == b->range.end)
+ && (a->range.start == b->range.start)
+ && (memcmp(a_, b_, range_n_bytes(&a->range)) == 0);
+}
+
+struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl,
+ const struct sw_flow_mask *mask)
+{
+ struct list_head *ml;
+
+ list_for_each(ml, tbl->mask_list) {
+ struct sw_flow_mask *m;
+ m = container_of(ml, struct sw_flow_mask, list);
+ if (mask_equal(mask, m))
+ return m;
+ }
+
+ return NULL;
+}
+
+/**
+ * add a new mask into the mask list.
+ * The caller needs to make sure that 'mask' is not the same
+ * as any masks that are already on the list.
+ */
+void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask)
+{
+ list_add_rcu(&mask->list, tbl->mask_list);
+}
+
+/* Initializes the flow module.
+ * Returns zero if successful or a negative error code. */
+int ovs_flow_init(void)
+{
+ BUILD_BUG_ON(__alignof__(struct sw_flow_key) % __alignof__(long));
+ BUILD_BUG_ON(sizeof(struct sw_flow_key) % sizeof(long));
+
+ flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0,
+ 0, NULL);
+ if (flow_cache == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/* Uninitializes the flow module. */
+void ovs_flow_exit(void)
+{
+ kmem_cache_destroy(flow_cache);
+}
diff --git a/datapath/flow_table.h b/datapath/flow_table.h
new file mode 100644
index 0000000..d0cc5cd
--- /dev/null
+++ b/datapath/flow_table.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2007-2013 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef FLOW_TABLE_H
+#define FLOW_TABLE_H 1
+
+#include <linux/kernel.h>
+#include <linux/netlink.h>
+#include <linux/openvswitch.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/rcupdate.h>
+#include <linux/if_ether.h>
+#include <linux/in6.h>
+#include <linux/jiffies.h>
+#include <linux/time.h>
+#include <linux/flex_array.h>
+
+#include <net/inet_ecn.h>
+#include <net/ip_tunnels.h>
+
+#include "flow.h"
+
+#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;
+};
+
+void ovs_match_init(struct sw_flow_match *match,
+ struct sw_flow_key *key, struct sw_flow_mask *mask);
+
+int ovs_flow_init(void);
+void ovs_flow_exit(void);
+
+struct sw_flow *ovs_flow_alloc(void);
+void ovs_flow_free(struct sw_flow *, bool deferred);
+
+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 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_tbl_destroy(struct flow_table *table, bool deferred);
+
+void ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow);
+void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
+struct sw_flow *ovs_flow_tbl_dump_next(struct flow_table *table,
+ u32 *bucket, u32 *idx);
+struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *,
+ const struct sw_flow_key *);
+
+bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
+ struct sw_flow_match *match);
+
+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_mask_key(struct sw_flow_key *dst, const struct sw_flow_key *src,
+ const struct sw_flow_mask *mask);
+
+#endif /* flow_table.h */
--
1.7.1
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