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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jesse/openvswitch 

Jesse Gross says:

====================
A number of significant new features and optimizations for net-next/3.12.
Highlights are:
 * "Megaflows", an optimization that allows userspace to specify which
   flow fields were used to compute the results of the flow lookup.
   This allows for a major reduction in flow setups (the major
   performance bottleneck in Open vSwitch) without reducing flexibility.
 * Converting netlink dump operations to use RCU, allowing for
   additional parallelism in userspace.
 * Matching and modifying SCTP protocol fields.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2013-08-27 22:11:18 -04:00
parent b6750b4056 5828cd9a68
commit 5b2941b18d
13 changed files with 1365 additions and 562 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
Documentation/networking/openvswitch.txt
View File

@ -91,6 +91,46 @@ Often we ellipsize arguments not important to the discussion, e.g.:
in_port(1), eth(...), eth_type(0x0800), ipv4(...), tcp(...)
Wildcarded flow key format
--------------------------
A wildcarded flow is described with two sequences of Netlink attributes
passed over the Netlink socket. A flow key, exactly as described above, and an
optional corresponding flow mask.
A wildcarded flow can represent a group of exact match flows. Each '1' bit
in the mask specifies a exact match with the corresponding bit in the flow key.
A '0' bit specifies a don't care bit, which will match either a '1' or '0' bit
of a incoming packet. Using wildcarded flow can improve the flow set up rate
by reduce the number of new flows need to be processed by the user space program.
Support for the mask Netlink attribute is optional for both the kernel and user
space program. The kernel can ignore the mask attribute, installing an exact
match flow, or reduce the number of don't care bits in the kernel to less than
what was specified by the user space program. In this case, variations in bits
that the kernel does not implement will simply result in additional flow setups.
The kernel module will also work with user space programs that neither support
nor supply flow mask attributes.
Since the kernel may ignore or modify wildcard bits, it can be difficult for
the userspace program to know exactly what matches are installed. There are
two possible approaches: reactively install flows as they miss the kernel
flow table (and therefore not attempt to determine wildcard changes at all)
or use the kernel's response messages to determine the installed wildcards.
When interacting with userspace, the kernel should maintain the match portion
of the key exactly as originally installed. This will provides a handle to
identify the flow for all future operations. However, when reporting the
mask of an installed flow, the mask should include any restrictions imposed
by the kernel.
The behavior when using overlapping wildcarded flows is undefined. It is the
responsibility of the user space program to ensure that any incoming packet
can match at most one flow, wildcarded or not. The current implementation
performs best-effort detection of overlapping wildcarded flows and may reject
some but not all of them. However, this behavior may change in future versions.
Basic rule for evolving flow keys
---------------------------------

1
include/net/ipv6.h
View File

@ -41,6 +41,7 @@
#define NEXTHDR_ICMP 58 /* ICMP for IPv6. */
#define NEXTHDR_NONE 59 /* No next header */
#define NEXTHDR_DEST 60 /* Destination options header. */
#define NEXTHDR_SCTP 132 /* SCTP message. */
#define NEXTHDR_MOBILITY 135 /* Mobility header. */
#define NEXTHDR_MAX 255

15
include/uapi/linux/openvswitch.h
View File

@ -1,6 +1,6 @@
/*
* Copyright (c) 2007-2011 Nicira Networks.
* 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
@ -259,6 +259,7 @@ enum ovs_key_attr {
OVS_KEY_ATTR_ND, /* struct ovs_key_nd */
OVS_KEY_ATTR_SKB_MARK, /* u32 skb mark */
OVS_KEY_ATTR_TUNNEL, /* Nested set of ovs_tunnel attributes */
OVS_KEY_ATTR_SCTP, /* struct ovs_key_sctp */
#ifdef __KERNEL__
OVS_KEY_ATTR_IPV4_TUNNEL, /* struct ovs_key_ipv4_tunnel */
@ -333,6 +334,11 @@ struct ovs_key_udp {
__be16 udp_dst;
};
struct ovs_key_sctp {
__be16 sctp_src;
__be16 sctp_dst;
};
struct ovs_key_icmp {
__u8 icmp_type;
__u8 icmp_code;
@ -379,6 +385,12 @@ struct ovs_key_nd {
* @OVS_FLOW_ATTR_CLEAR: If present in a %OVS_FLOW_CMD_SET request, clears the
* last-used time, accumulated TCP flags, and statistics for this flow.
* Otherwise ignored in requests. Never present in notifications.
* @OVS_FLOW_ATTR_MASK: Nested %OVS_KEY_ATTR_* attributes specifying the
* mask bits for wildcarded flow match. Mask bit value '1' specifies exact
* match with corresponding flow key bit, while mask bit value '0' specifies
* a wildcarded match. Omitting attribute is treated as wildcarding all
* corresponding fields. Optional for all requests. If not present,
* all flow key bits are exact match bits.
*
* These attributes follow the &struct ovs_header within the Generic Netlink
* payload for %OVS_FLOW_* commands.
@ -391,6 +403,7 @@ enum ovs_flow_attr {
OVS_FLOW_ATTR_TCP_FLAGS, /* 8-bit OR'd TCP flags. */
OVS_FLOW_ATTR_USED, /* u64 msecs last used in monotonic time. */
OVS_FLOW_ATTR_CLEAR, /* Flag to clear stats, tcp_flags, used. */
OVS_FLOW_ATTR_MASK, /* Sequence of OVS_KEY_ATTR_* attributes. */
__OVS_FLOW_ATTR_MAX
};

1
net/openvswitch/Kconfig
View File

@ -4,6 +4,7 @@
config OPENVSWITCH
tristate "Open vSwitch"
select LIBCRC32C
---help---
Open vSwitch is a multilayer Ethernet switch targeted at virtualized
environments. In addition to supporting a variety of features

5
net/openvswitch/Makefile
View File

@ -10,10 +10,13 @@ openvswitch-y := \
dp_notify.o \
flow.o \
vport.o \
vport-gre.o \
vport-internal_dev.o \
vport-netdev.o
ifneq ($(CONFIG_OPENVSWITCH_VXLAN),)
openvswitch-y += vport-vxlan.o
endif
ifneq ($(CONFIG_OPENVSWITCH_GRE),)
openvswitch-y += vport-gre.o
endif

45
net/openvswitch/actions.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2007-2012 Nicira, Inc.
* 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
@ -22,6 +22,7 @@
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/openvswitch.h>
#include <linux/sctp.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/in6.h>
@ -31,6 +32,7 @@
#include <net/ipv6.h>
#include <net/checksum.h>
#include <net/dsfield.h>
#include <net/sctp/checksum.h>
#include "datapath.h"
#include "vport.h"
@ -352,6 +354,39 @@ static int set_tcp(struct sk_buff *skb, const struct ovs_key_tcp *tcp_port_key)
return 0;
}
static int set_sctp(struct sk_buff *skb,
const struct ovs_key_sctp *sctp_port_key)
{
struct sctphdr *sh;
int err;
unsigned int sctphoff = skb_transport_offset(skb);
err = make_writable(skb, sctphoff + sizeof(struct sctphdr));
if (unlikely(err))
return err;
sh = sctp_hdr(skb);
if (sctp_port_key->sctp_src != sh->source ||
sctp_port_key->sctp_dst != sh->dest) {
__le32 old_correct_csum, new_csum, old_csum;
old_csum = sh->checksum;
old_correct_csum = sctp_compute_cksum(skb, sctphoff);
sh->source = sctp_port_key->sctp_src;
sh->dest = sctp_port_key->sctp_dst;
new_csum = sctp_compute_cksum(skb, sctphoff);
/* Carry any checksum errors through. */
sh->checksum = old_csum ^ old_correct_csum ^ new_csum;
skb->rxhash = 0;
}
return 0;
}
static int do_output(struct datapath *dp, struct sk_buff *skb, int out_port)
{
struct vport *vport;
@ -376,8 +411,10 @@ static int output_userspace(struct datapath *dp, struct sk_buff *skb,
const struct nlattr *a;
int rem;
BUG_ON(!OVS_CB(skb)->pkt_key);
upcall.cmd = OVS_PACKET_CMD_ACTION;
upcall.key = &OVS_CB(skb)->flow->key;
upcall.key = OVS_CB(skb)->pkt_key;
upcall.userdata = NULL;
upcall.portid = 0;
@ -459,6 +496,10 @@ static int execute_set_action(struct sk_buff *skb,
case OVS_KEY_ATTR_UDP:
err = set_udp(skb, nla_data(nested_attr));
break;
case OVS_KEY_ATTR_SCTP:
err = set_sctp(skb, nla_data(nested_attr));
break;
}
return err;

176
net/openvswitch/datapath.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2007-2012 Nicira, Inc.
* 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
@ -165,7 +165,7 @@ static void destroy_dp_rcu(struct rcu_head *rcu)
{
struct datapath *dp = container_of(rcu, struct datapath, rcu);
ovs_flow_tbl_destroy((__force struct flow_table *)dp->table);
ovs_flow_tbl_destroy((__force struct flow_table *)dp->table, false);
free_percpu(dp->stats_percpu);
release_net(ovs_dp_get_net(dp));
kfree(dp->ports);
@ -226,19 +226,18 @@ void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
struct sw_flow_key key;
u64 *stats_counter;
int error;
int key_len;
stats = this_cpu_ptr(dp->stats_percpu);
/* Extract flow from 'skb' into 'key'. */
error = ovs_flow_extract(skb, p->port_no, &key, &key_len);
error = ovs_flow_extract(skb, p->port_no, &key);
if (unlikely(error)) {
kfree_skb(skb);
return;
}
/* Look up flow. */
flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table), &key, key_len);
flow = ovs_flow_lookup(rcu_dereference(dp->table), &key);
if (unlikely(!flow)) {
struct dp_upcall_info upcall;
@ -253,6 +252,7 @@ void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
}
OVS_CB(skb)->flow = flow;
OVS_CB(skb)->pkt_key = &key;
stats_counter = &stats->n_hit;
ovs_flow_used(OVS_CB(skb)->flow, skb);
@ -435,7 +435,7 @@ 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, user_skb);
ovs_flow_to_nlattrs(upcall_info->key, upcall_info->key, user_skb);
nla_nest_end(user_skb, nla);
if (upcall_info->userdata)
@ -468,7 +468,7 @@ static int flush_flows(struct datapath *dp)
rcu_assign_pointer(dp->table, new_table);
ovs_flow_tbl_deferred_destroy(old_table);
ovs_flow_tbl_destroy(old_table, true);
return 0;
}
@ -611,10 +611,12 @@ static int validate_tp_port(const struct sw_flow_key *flow_key)
static int validate_and_copy_set_tun(const struct nlattr *attr,
struct sw_flow_actions **sfa)
{
struct ovs_key_ipv4_tunnel tun_key;
struct sw_flow_match match;
struct sw_flow_key key;
int err, start;
err = ovs_ipv4_tun_from_nlattr(nla_data(attr), &tun_key);
ovs_match_init(&match, &key, NULL);
err = ovs_ipv4_tun_from_nlattr(nla_data(attr), &match, false);
if (err)
return err;
@ -622,7 +624,8 @@ static int validate_and_copy_set_tun(const struct nlattr *attr,
if (start < 0)
return start;
err = add_action(sfa, OVS_KEY_ATTR_IPV4_TUNNEL, &tun_key, sizeof(tun_key));
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;
@ -709,6 +712,12 @@ static int validate_set(const struct nlattr *a,
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;
}
@ -857,7 +866,6 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
struct ethhdr *eth;
int len;
int err;
int key_len;
err = -EINVAL;
if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
@ -890,11 +898,11 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
if (IS_ERR(flow))
goto err_kfree_skb;
err = ovs_flow_extract(packet, -1, &flow->key, &key_len);
err = ovs_flow_extract(packet, -1, &flow->key);
if (err)
goto err_flow_free;
err = ovs_flow_metadata_from_nlattrs(flow, key_len, a[OVS_PACKET_ATTR_KEY]);
err = ovs_flow_metadata_from_nlattrs(flow, a[OVS_PACKET_ATTR_KEY]);
if (err)
goto err_flow_free;
acts = ovs_flow_actions_alloc(nla_len(a[OVS_PACKET_ATTR_ACTIONS]));
@ -908,6 +916,7 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
goto err_flow_free;
OVS_CB(packet)->flow = flow;
OVS_CB(packet)->pkt_key = &flow->key;
packet->priority = flow->key.phy.priority;
packet->mark = flow->key.phy.skb_mark;
@ -922,13 +931,13 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
local_bh_enable();
rcu_read_unlock();
ovs_flow_free(flow);
ovs_flow_free(flow, false);
return err;
err_unlock:
rcu_read_unlock();
err_flow_free:
ovs_flow_free(flow);
ovs_flow_free(flow, false);
err_kfree_skb:
kfree_skb(packet);
err:
@ -951,9 +960,10 @@ static struct genl_ops dp_packet_genl_ops[] = {
static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats)
{
struct flow_table *table;
int i;
struct flow_table *table = ovsl_dereference(dp->table);
table = rcu_dereference_check(dp->table, lockdep_ovsl_is_held());
stats->n_flows = ovs_flow_tbl_count(table);
stats->n_hit = stats->n_missed = stats->n_lost = 0;
@ -1044,7 +1054,8 @@ static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
if (!start)
return -EMSGSIZE;
err = ovs_ipv4_tun_to_nlattr(skb, nla_data(ovs_key));
err = ovs_ipv4_tun_to_nlattr(skb, nla_data(ovs_key),
nla_data(ovs_key));
if (err)
return err;
nla_nest_end(skb, start);
@ -1092,6 +1103,7 @@ static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts)
{
return NLMSG_ALIGN(sizeof(struct ovs_header))
+ nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_KEY */
+ nla_total_size(key_attr_size()) /* OVS_FLOW_ATTR_MASK */
+ nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
+ nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
+ nla_total_size(8) /* OVS_FLOW_ATTR_USED */
@ -1104,7 +1116,6 @@ static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
u32 seq, u32 flags, u8 cmd)
{
const int skb_orig_len = skb->len;
const struct sw_flow_actions *sf_acts;
struct nlattr *start;
struct ovs_flow_stats stats;
struct ovs_header *ovs_header;
@ -1113,22 +1124,33 @@ static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
u8 tcp_flags;
int err;
sf_acts = ovsl_dereference(flow->sf_acts);
ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, flags, cmd);
if (!ovs_header)
return -EMSGSIZE;
ovs_header->dp_ifindex = get_dpifindex(dp);
/* Fill flow key. */
nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
if (!nla)
goto nla_put_failure;
err = ovs_flow_to_nlattrs(&flow->key, skb);
err = ovs_flow_to_nlattrs(&flow->unmasked_key,
&flow->unmasked_key, skb);
if (err)
goto error;
nla_nest_end(skb, nla);
nla = nla_nest_start(skb, OVS_FLOW_ATTR_MASK);
if (!nla)
goto nla_put_failure;
err = ovs_flow_to_nlattrs(&flow->key, &flow->mask->key, skb);
if (err)
goto error;
nla_nest_end(skb, nla);
spin_lock_bh(&flow->lock);
used = flow->used;
stats.n_packets = flow->packet_count;
@ -1161,6 +1183,11 @@ static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
*/
start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS);
if (start) {
const struct sw_flow_actions *sf_acts;
sf_acts = rcu_dereference_check(flow->sf_acts,
lockdep_ovsl_is_held());
err = actions_to_attr(sf_acts->actions, sf_acts->actions_len, skb);
if (!err)
nla_nest_end(skb, start);
@ -1211,20 +1238,24 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr **a = info->attrs;
struct ovs_header *ovs_header = info->userhdr;
struct sw_flow_key key;
struct sw_flow *flow;
struct sw_flow_key key, masked_key;
struct sw_flow *flow = NULL;
struct sw_flow_mask mask;
struct sk_buff *reply;
struct datapath *dp;
struct flow_table *table;
struct sw_flow_actions *acts = NULL;
struct sw_flow_match match;
int error;
int key_len;
/* Extract key. */
error = -EINVAL;
if (!a[OVS_FLOW_ATTR_KEY])
goto error;
error = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
ovs_match_init(&match, &key, &mask);
error = ovs_match_from_nlattrs(&match,
a[OVS_FLOW_ATTR_KEY], a[OVS_FLOW_ATTR_MASK]);
if (error)
goto error;
@ -1235,9 +1266,13 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
if (IS_ERR(acts))
goto error;
error = validate_and_copy_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0, &acts);
if (error)
ovs_flow_key_mask(&masked_key, &key, &mask);
error = validate_and_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;
}
} else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) {
error = -EINVAL;
goto error;
@ -1250,8 +1285,11 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
goto err_unlock_ovs;
table = ovsl_dereference(dp->table);
flow = ovs_flow_tbl_lookup(table, &key, key_len);
/* Check if this is a duplicate flow */
flow = ovs_flow_lookup(table, &key);
if (!flow) {
struct sw_flow_mask *mask_p;
/* Bail out if we're not allowed to create a new flow. */
error = -ENOENT;
if (info->genlhdr->cmd == OVS_FLOW_CMD_SET)
@ -1264,7 +1302,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
new_table = ovs_flow_tbl_expand(table);
if (!IS_ERR(new_table)) {
rcu_assign_pointer(dp->table, new_table);
ovs_flow_tbl_deferred_destroy(table);
ovs_flow_tbl_destroy(table, true);
table = ovsl_dereference(dp->table);
}
}
@ -1277,14 +1315,30 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
}
clear_stats(flow);
flow->key = masked_key;
flow->unmasked_key = key;
/* Make sure mask is unique in the system */
mask_p = ovs_sw_flow_mask_find(table, &mask);
if (!mask_p) {
/* Allocate a new mask if none exsits. */
mask_p = ovs_sw_flow_mask_alloc();
if (!mask_p)
goto err_flow_free;
mask_p->key = mask.key;
mask_p->range = mask.range;
ovs_sw_flow_mask_insert(table, mask_p);
}
ovs_sw_flow_mask_add_ref(mask_p);
flow->mask = mask_p;
rcu_assign_pointer(flow->sf_acts, acts);
/* Put flow in bucket. */
ovs_flow_tbl_insert(table, flow, &key, key_len);
ovs_flow_insert(table, flow);
reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
info->snd_seq,
OVS_FLOW_CMD_NEW);
info->snd_seq, OVS_FLOW_CMD_NEW);
} else {
/* We found a matching flow. */
struct sw_flow_actions *old_acts;
@ -1300,6 +1354,13 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL))
goto err_unlock_ovs;
/* The unmasked key has to be the same for flow updates. */
error = -EINVAL;
if (!ovs_flow_cmp_unmasked_key(flow, &key, match.range.end)) {
OVS_NLERR("Flow modification message rejected, unmasked key does not match.\n");
goto err_unlock_ovs;
}
/* Update actions. */
old_acts = ovsl_dereference(flow->sf_acts);
rcu_assign_pointer(flow->sf_acts, acts);
@ -1324,6 +1385,8 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
return 0;
err_flow_free:
ovs_flow_free(flow, false);
err_unlock_ovs:
ovs_unlock();
err_kfree:
@ -1341,12 +1404,16 @@ static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
struct sw_flow *flow;
struct datapath *dp;
struct flow_table *table;
struct sw_flow_match match;
int err;
int key_len;
if (!a[OVS_FLOW_ATTR_KEY])
if (!a[OVS_FLOW_ATTR_KEY]) {
OVS_NLERR("Flow get message rejected, Key attribute missing.\n");
return -EINVAL;
err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
}
ovs_match_init(&match, &key, NULL);
err = ovs_match_from_nlattrs(&match, a[OVS_FLOW_ATTR_KEY], NULL);
if (err)
return err;
@ -1358,7 +1425,7 @@ static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
}
table = ovsl_dereference(dp->table);
flow = ovs_flow_tbl_lookup(table, &key, key_len);
flow = ovs_flow_lookup_unmasked_key(table, &match);
if (!flow) {
err = -ENOENT;
goto unlock;
@ -1387,8 +1454,8 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
struct sw_flow *flow;
struct datapath *dp;
struct flow_table *table;
struct sw_flow_match match;
int err;
int key_len;
ovs_lock();
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
@ -1401,12 +1468,14 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
err = flush_flows(dp);
goto unlock;
}
err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
ovs_match_init(&match, &key, NULL);
err = ovs_match_from_nlattrs(&match, a[OVS_FLOW_ATTR_KEY], NULL);
if (err)
goto unlock;
table = ovsl_dereference(dp->table);
flow = ovs_flow_tbl_lookup(table, &key, key_len);
flow = ovs_flow_lookup_unmasked_key(table, &match);
if (!flow) {
err = -ENOENT;
goto unlock;
@ -1418,13 +1487,13 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
goto unlock;
}
ovs_flow_tbl_remove(table, flow);
ovs_flow_remove(table, flow);
err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_portid,
info->snd_seq, 0, OVS_FLOW_CMD_DEL);
BUG_ON(err < 0);
ovs_flow_deferred_free(flow);
ovs_flow_free(flow, true);
ovs_unlock();
ovs_notify(reply, info, &ovs_dp_flow_multicast_group);
@ -1440,22 +1509,21 @@ static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
struct datapath *dp;
struct flow_table *table;
ovs_lock();
rcu_read_lock();
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
if (!dp) {
ovs_unlock();
rcu_read_unlock();
return -ENODEV;
}
table = ovsl_dereference(dp->table);
table = rcu_dereference(dp->table);
for (;;) {
struct sw_flow *flow;
u32 bucket, obj;
bucket = cb->args[0];
obj = cb->args[1];
flow = ovs_flow_tbl_next(table, &bucket, &obj);
flow = ovs_flow_dump_next(table, &bucket, &obj);
if (!flow)
break;
@ -1468,7 +1536,7 @@ static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
cb->args[0] = bucket;
cb->args[1] = obj;
}
ovs_unlock();
rcu_read_unlock();
return skb->len;
}
@ -1664,7 +1732,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
goto err_destroy_local_port;
ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
list_add_tail(&dp->list_node, &ovs_net->dps);
list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
ovs_unlock();
@ -1678,7 +1746,7 @@ err_destroy_ports_array:
err_destroy_percpu:
free_percpu(dp->stats_percpu);
err_destroy_table:
ovs_flow_tbl_destroy(ovsl_dereference(dp->table));
ovs_flow_tbl_destroy(ovsl_dereference(dp->table), false);
err_free_dp:
release_net(ovs_dp_get_net(dp));
kfree(dp);
@ -1702,7 +1770,7 @@ static void __dp_destroy(struct datapath *dp)
ovs_dp_detach_port(vport);
}
list_del(&dp->list_node);
list_del_rcu(&dp->list_node);
/* OVSP_LOCAL is datapath internal port. We need to make sure that
* all port in datapath are destroyed first before freeing datapath.
@ -1807,8 +1875,8 @@ static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
int skip = cb->args[0];
int i = 0;
ovs_lock();
list_for_each_entry(dp, &ovs_net->dps, list_node) {
rcu_read_lock();
list_for_each_entry_rcu(dp, &ovs_net->dps, list_node) {
if (i >= skip &&
ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
@ -1816,7 +1884,7 @@ static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
break;
i++;
}
ovs_unlock();
rcu_read_unlock();
cb->args[0] = i;
@ -2285,7 +2353,7 @@ static void rehash_flow_table(struct work_struct *work)
new_table = ovs_flow_tbl_rehash(old_table);
if (!IS_ERR(new_table)) {
rcu_assign_pointer(dp->table, new_table);
ovs_flow_tbl_deferred_destroy(old_table);
ovs_flow_tbl_destroy(old_table, true);
}
}
}

6
net/openvswitch/datapath.h
View File

@ -88,11 +88,13 @@ struct datapath {
/**
* struct ovs_skb_cb - OVS data in skb CB
* @flow: The flow associated with this packet. May be %NULL if no flow.
* @pkt_key: The flow information extracted from the packet. Must be nonnull.
* @tun_key: Key for the tunnel that encapsulated this packet. NULL if the
* packet is not being tunneled.
*/
struct ovs_skb_cb {
struct sw_flow *flow;
struct sw_flow_key *pkt_key;
struct ovs_key_ipv4_tunnel *tun_key;
};
#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
@ -183,4 +185,8 @@ struct sk_buff *ovs_vport_cmd_build_info(struct vport *, u32 pid, u32 seq,
int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb);
void ovs_dp_notify_wq(struct work_struct *work);
#define OVS_NLERR(fmt, ...) \
pr_info_once("netlink: " fmt, ##__VA_ARGS__)
#endif /* datapath.h */

1485
net/openvswitch/flow.c
View File

File diff suppressed because it is too large Load Diff

87
net/openvswitch/flow.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2007-2011 Nicira, Inc.
* 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
@ -33,6 +33,8 @@
#include <net/inet_ecn.h>
struct sk_buff;
struct sw_flow_mask;
struct flow_table;
struct sw_flow_actions {
struct rcu_head rcu;
@ -97,8 +99,8 @@ struct sw_flow_key {
} addr;
union {
struct {
__be16 src; /* TCP/UDP source port. */
__be16 dst; /* TCP/UDP destination port. */
__be16 src; /* TCP/UDP/SCTP source port. */
__be16 dst; /* TCP/UDP/SCTP destination port. */
} tp;
struct {
u8 sha[ETH_ALEN]; /* ARP source hardware address. */
@ -113,8 +115,8 @@ struct sw_flow_key {
} addr;
__be32 label; /* IPv6 flow label. */
struct {
__be16 src; /* TCP/UDP source port. */
__be16 dst; /* TCP/UDP destination port. */
__be16 src; /* TCP/UDP/SCTP source port. */
__be16 dst; /* TCP/UDP/SCTP destination port. */
} tp;
struct {
struct in6_addr target; /* ND target address. */
@ -123,7 +125,7 @@ struct sw_flow_key {
} nd;
} ipv6;
};
};
} __aligned(__alignof__(long));
struct sw_flow {
struct rcu_head rcu;
@ -131,6 +133,8 @@ struct sw_flow {
u32 hash;
struct sw_flow_key key;
struct sw_flow_key unmasked_key;
struct sw_flow_mask *mask;
struct sw_flow_actions __rcu *sf_acts;
spinlock_t lock; /* Lock for values below. */
@ -140,6 +144,20 @@ 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 */
@ -159,20 +177,20 @@ 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 *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 *,
int *key_lenp);
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 *, struct sk_buff *);
int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
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, int key_len,
int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow,
const struct nlattr *attr);
#define MAX_ACTIONS_BUFSIZE (32 * 1024)
@ -182,6 +200,7 @@ 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;
@ -197,22 +216,44 @@ static inline int ovs_flow_tbl_need_to_expand(struct flow_table *table)
return (table->count > table->n_buckets);
}
struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *table,
struct sw_flow_key *key, int len);
void ovs_flow_tbl_destroy(struct flow_table *table);
void ovs_flow_tbl_deferred_destroy(struct flow_table *table);
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_tbl_insert(struct flow_table *table, struct sw_flow *flow,
struct sw_flow_key *key, int key_len);
void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
struct sw_flow *ovs_flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *idx);
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 ovs_key_ipv4_tunnel *tun_key);
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 *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;
};
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 */

3
net/openvswitch/vport-gre.c
View File

@ -16,7 +16,6 @@
* 02110-1301, USA
*/
#ifdef CONFIG_OPENVSWITCH_GRE
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/if.h>
@ -271,5 +270,3 @@ const struct vport_ops ovs_gre_vport_ops = {
.get_name = gre_get_name,
.send = gre_tnl_send,
};
#endif /* OPENVSWITCH_GRE */

20
net/openvswitch/vport-netdev.c
View File

@ -25,6 +25,7 @@
#include <linux/llc.h>
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
#include <linux/openvswitch.h>
#include <net/llc.h>
@ -74,6 +75,15 @@ static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb)
return RX_HANDLER_CONSUMED;
}
static struct net_device *get_dpdev(struct datapath *dp)
{
struct vport *local;
local = ovs_vport_ovsl(dp, OVSP_LOCAL);
BUG_ON(!local);
return netdev_vport_priv(local)->dev;
}
static struct vport *netdev_create(const struct vport_parms *parms)
{
struct vport *vport;
@ -103,10 +113,15 @@ static struct vport *netdev_create(const struct vport_parms *parms)
}
rtnl_lock();
err = netdev_master_upper_dev_link(netdev_vport->dev,
get_dpdev(vport->dp));
if (err)
goto error_unlock;
err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook,
vport);
if (err)
goto error_unlock;
goto error_master_upper_dev_unlink;
dev_set_promiscuity(netdev_vport->dev, 1);
netdev_vport->dev->priv_flags |= IFF_OVS_DATAPATH;
@ -114,6 +129,8 @@ static struct vport *netdev_create(const struct vport_parms *parms)
return vport;
error_master_upper_dev_unlink:
netdev_upper_dev_unlink(netdev_vport->dev, get_dpdev(vport->dp));
error_unlock:
rtnl_unlock();
error_put:
@ -140,6 +157,7 @@ static void netdev_destroy(struct vport *vport)
rtnl_lock();
netdev_vport->dev->priv_flags &= ~IFF_OVS_DATAPATH;
netdev_rx_handler_unregister(netdev_vport->dev);
netdev_upper_dev_unlink(netdev_vport->dev, get_dpdev(vport->dp));
dev_set_promiscuity(netdev_vport->dev, -1);
rtnl_unlock();

3
net/openvswitch/vport.c
View File

@ -203,7 +203,7 @@ out:
* ovs_vport_set_options - modify existing vport device (for kernel callers)
*
* @vport: vport to modify.
* @port: New configuration.
* @options: New configuration.
*
* Modifies an existing device with the specified configuration (which is
* dependent on device type). ovs_mutex must be held.
@ -328,6 +328,7 @@ int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb)
*
* @vport: vport that received the packet
* @skb: skb that was received
* @tun_key: tunnel (if any) that carried packet
*
* Must be called with rcu_read_lock. The packet cannot be shared and
* skb->data should point to the Ethernet header.