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

This commit is contained in:
David S. Miller 2012-09-04 15:22:28 -04:00
parent 3731a334c0 15eac2a742
commit cefd81cfec
10 changed files with 315 additions and 169 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/openvswitch/actions.c
View File

@ -266,7 +266,7 @@ static int do_output(struct datapath *dp, struct sk_buff *skb, int out_port)
if (unlikely(!skb))
return -ENOMEM;
vport = rcu_dereference(dp->ports[out_port]);
vport = ovs_vport_rcu(dp, out_port);
if (unlikely(!vport)) {
kfree_skb(skb);
return -ENODEV;

371
net/openvswitch/datapath.c
View File

@ -49,11 +49,28 @@
#include <linux/dmi.h>
#include <linux/workqueue.h>
#include <net/genetlink.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include "datapath.h"
#include "flow.h"
#include "vport-internal_dev.h"
/**
* struct ovs_net - Per net-namespace data for ovs.
* @dps: List of datapaths to enable dumping them all out.
* Protected by genl_mutex.
*/
struct ovs_net {
struct list_head dps;
};
static int ovs_net_id __read_mostly;
#define REHASH_FLOW_INTERVAL (10 * 60 * HZ)
static void rehash_flow_table(struct work_struct *work);
static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table);
/**
* DOC: Locking:
*
@ -71,29 +88,21 @@
* each other.
*/
/* Global list of datapaths to enable dumping them all out.
* Protected by genl_mutex.
*/
static LIST_HEAD(dps);
#define REHASH_FLOW_INTERVAL (10 * 60 * HZ)
static void rehash_flow_table(struct work_struct *work);
static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table);
static struct vport *new_vport(const struct vport_parms *);
static int queue_gso_packets(int dp_ifindex, struct sk_buff *,
static int queue_gso_packets(struct net *, int dp_ifindex, struct sk_buff *,
const struct dp_upcall_info *);
static int queue_userspace_packet(int dp_ifindex, struct sk_buff *,
static int queue_userspace_packet(struct net *, int dp_ifindex,
struct sk_buff *,
const struct dp_upcall_info *);
/* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */
static struct datapath *get_dp(int dp_ifindex)
static struct datapath *get_dp(struct net *net, int dp_ifindex)
{
struct datapath *dp = NULL;
struct net_device *dev;
rcu_read_lock();
dev = dev_get_by_index_rcu(&init_net, dp_ifindex);
dev = dev_get_by_index_rcu(net, dp_ifindex);
if (dev) {
struct vport *vport = ovs_internal_dev_get_vport(dev);
if (vport)
@ -107,7 +116,7 @@ static struct datapath *get_dp(int dp_ifindex)
/* Must be called with rcu_read_lock or RTNL lock. */
const char *ovs_dp_name(const struct datapath *dp)
{
struct vport *vport = rcu_dereference_rtnl(dp->ports[OVSP_LOCAL]);
struct vport *vport = ovs_vport_rtnl_rcu(dp, OVSP_LOCAL);
return vport->ops->get_name(vport);
}
@ -118,7 +127,7 @@ static int get_dpifindex(struct datapath *dp)
rcu_read_lock();
local = rcu_dereference(dp->ports[OVSP_LOCAL]);
local = ovs_vport_rcu(dp, OVSP_LOCAL);
if (local)
ifindex = local->ops->get_ifindex(local);
else
@ -135,9 +144,31 @@ static void destroy_dp_rcu(struct rcu_head *rcu)
ovs_flow_tbl_destroy((__force struct flow_table *)dp->table);
free_percpu(dp->stats_percpu);
release_net(ovs_dp_get_net(dp));
kfree(dp->ports);
kfree(dp);
}
static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
u16 port_no)
{
return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
}
struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
{
struct vport *vport;
struct hlist_node *n;
struct hlist_head *head;
head = vport_hash_bucket(dp, port_no);
hlist_for_each_entry_rcu(vport, n, head, dp_hash_node) {
if (vport->port_no == port_no)
return vport;
}
return NULL;
}
/* Called with RTNL lock and genl_lock. */
static struct vport *new_vport(const struct vport_parms *parms)
{
@ -146,9 +177,9 @@ static struct vport *new_vport(const struct vport_parms *parms)
vport = ovs_vport_add(parms);
if (!IS_ERR(vport)) {
struct datapath *dp = parms->dp;
struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
rcu_assign_pointer(dp->ports[parms->port_no], vport);
list_add(&vport->node, &dp->port_list);
hlist_add_head_rcu(&vport->dp_hash_node, head);
}
return vport;
@ -160,8 +191,7 @@ void ovs_dp_detach_port(struct vport *p)
ASSERT_RTNL();
/* First drop references to device. */
list_del(&p->node);
rcu_assign_pointer(p->dp->ports[p->port_no], NULL);
hlist_del_rcu(&p->dp_hash_node);
/* Then destroy it. */
ovs_vport_del(p);
@ -220,11 +250,12 @@ static struct genl_family dp_packet_genl_family = {
.hdrsize = sizeof(struct ovs_header),
.name = OVS_PACKET_FAMILY,
.version = OVS_PACKET_VERSION,
.maxattr = OVS_PACKET_ATTR_MAX
.maxattr = OVS_PACKET_ATTR_MAX,
.netnsok = true
};
int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
const struct dp_upcall_info *upcall_info)
const struct dp_upcall_info *upcall_info)
{
struct dp_stats_percpu *stats;
int dp_ifindex;
@ -242,9 +273,9 @@ int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
}
if (!skb_is_gso(skb))
err = queue_userspace_packet(dp_ifindex, skb, upcall_info);
err = queue_userspace_packet(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info);
else
err = queue_gso_packets(dp_ifindex, skb, upcall_info);
err = queue_gso_packets(ovs_dp_get_net(dp), dp_ifindex, skb, upcall_info);
if (err)
goto err;
@ -260,7 +291,8 @@ err:
return err;
}
static int queue_gso_packets(int dp_ifindex, struct sk_buff *skb,
static int queue_gso_packets(struct net *net, int dp_ifindex,
struct sk_buff *skb,
const struct dp_upcall_info *upcall_info)
{
unsigned short gso_type = skb_shinfo(skb)->gso_type;
@ -276,7 +308,7 @@ static int queue_gso_packets(int dp_ifindex, struct sk_buff *skb,
/* Queue all of the segments. */
skb = segs;
do {
err = queue_userspace_packet(dp_ifindex, skb, upcall_info);
err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info);
if (err)
break;
@ -306,7 +338,8 @@ static int queue_gso_packets(int dp_ifindex, struct sk_buff *skb,
return err;
}
static int queue_userspace_packet(int dp_ifindex, struct sk_buff *skb,
static int queue_userspace_packet(struct net *net, int dp_ifindex,
struct sk_buff *skb,
const struct dp_upcall_info *upcall_info)
{
struct ovs_header *upcall;
@ -362,7 +395,7 @@ static int queue_userspace_packet(int dp_ifindex, struct sk_buff *skb,
skb_copy_and_csum_dev(skb, nla_data(nla));
err = genlmsg_unicast(&init_net, user_skb, upcall_info->pid);
err = genlmsg_unicast(net, user_skb, upcall_info->pid);
out:
kfree_skb(nskb);
@ -370,15 +403,10 @@ out:
}
/* Called with genl_mutex. */
static int flush_flows(int dp_ifindex)
static int flush_flows(struct datapath *dp)
{
struct flow_table *old_table;
struct flow_table *new_table;
struct datapath *dp;
dp = get_dp(dp_ifindex);
if (!dp)
return -ENODEV;
old_table = genl_dereference(dp->table);
new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS);
@ -668,7 +696,7 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
packet->priority = flow->key.phy.priority;
rcu_read_lock();
dp = get_dp(ovs_header->dp_ifindex);
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
err = -ENODEV;
if (!dp)
goto err_unlock;
@ -742,7 +770,8 @@ static struct genl_family dp_flow_genl_family = {
.hdrsize = sizeof(struct ovs_header),
.name = OVS_FLOW_FAMILY,
.version = OVS_FLOW_VERSION,
.maxattr = OVS_FLOW_ATTR_MAX
.maxattr = OVS_FLOW_ATTR_MAX,
.netnsok = true
};
static struct genl_multicast_group ovs_dp_flow_multicast_group = {
@ -894,7 +923,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
goto error;
}
dp = get_dp(ovs_header->dp_ifindex);
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
error = -ENODEV;
if (!dp)
goto error;
@ -995,7 +1024,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
ovs_dp_flow_multicast_group.id, info->nlhdr,
GFP_KERNEL);
else
netlink_set_err(init_net.genl_sock, 0,
netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
return 0;
@ -1023,7 +1052,7 @@ static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
if (err)
return err;
dp = get_dp(ovs_header->dp_ifindex);
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
if (!dp)
return -ENODEV;
@ -1052,16 +1081,17 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
int err;
int key_len;
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
if (!dp)
return -ENODEV;
if (!a[OVS_FLOW_ATTR_KEY])
return flush_flows(ovs_header->dp_ifindex);
return flush_flows(dp);
err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
if (err)
return err;
dp = get_dp(ovs_header->dp_ifindex);
if (!dp)
return -ENODEV;
table = genl_dereference(dp->table);
flow = ovs_flow_tbl_lookup(table, &key, key_len);
if (!flow)
@ -1090,7 +1120,7 @@ static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
struct datapath *dp;
struct flow_table *table;
dp = get_dp(ovs_header->dp_ifindex);
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
if (!dp)
return -ENODEV;
@ -1152,7 +1182,8 @@ static struct genl_family dp_datapath_genl_family = {
.hdrsize = sizeof(struct ovs_header),
.name = OVS_DATAPATH_FAMILY,
.version = OVS_DATAPATH_VERSION,
.maxattr = OVS_DP_ATTR_MAX
.maxattr = OVS_DP_ATTR_MAX,
.netnsok = true
};
static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
@ -1210,18 +1241,19 @@ static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid,
}
/* Called with genl_mutex and optionally with RTNL lock also. */
static struct datapath *lookup_datapath(struct ovs_header *ovs_header,
static struct datapath *lookup_datapath(struct net *net,
struct ovs_header *ovs_header,
struct nlattr *a[OVS_DP_ATTR_MAX + 1])
{
struct datapath *dp;
if (!a[OVS_DP_ATTR_NAME])
dp = get_dp(ovs_header->dp_ifindex);
dp = get_dp(net, ovs_header->dp_ifindex);
else {
struct vport *vport;
rcu_read_lock();
vport = ovs_vport_locate(nla_data(a[OVS_DP_ATTR_NAME]));
vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
rcu_read_unlock();
}
@ -1235,22 +1267,21 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
struct sk_buff *reply;
struct datapath *dp;
struct vport *vport;
int err;
struct ovs_net *ovs_net;
int err, i;
err = -EINVAL;
if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
goto err;
rtnl_lock();
err = -ENODEV;
if (!try_module_get(THIS_MODULE))
goto err_unlock_rtnl;
err = -ENOMEM;
dp = kzalloc(sizeof(*dp), GFP_KERNEL);
if (dp == NULL)
goto err_put_module;
INIT_LIST_HEAD(&dp->port_list);
goto err_unlock_rtnl;
ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
/* Allocate table. */
err = -ENOMEM;
@ -1264,6 +1295,16 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
goto err_destroy_table;
}
dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
GFP_KERNEL);
if (!dp->ports) {
err = -ENOMEM;
goto err_destroy_percpu;
}
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
INIT_HLIST_HEAD(&dp->ports[i]);
/* Set up our datapath device. */
parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
parms.type = OVS_VPORT_TYPE_INTERNAL;
@ -1278,7 +1319,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
if (err == -EBUSY)
err = -EEXIST;
goto err_destroy_percpu;
goto err_destroy_ports_array;
}
reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
@ -1287,7 +1328,8 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
if (IS_ERR(reply))
goto err_destroy_local_port;
list_add_tail(&dp->list_node, &dps);
ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
list_add_tail(&dp->list_node, &ovs_net->dps);
rtnl_unlock();
genl_notify(reply, genl_info_net(info), info->snd_pid,
@ -1296,46 +1338,40 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
return 0;
err_destroy_local_port:
ovs_dp_detach_port(rtnl_dereference(dp->ports[OVSP_LOCAL]));
ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL));
err_destroy_ports_array:
kfree(dp->ports);
err_destroy_percpu:
free_percpu(dp->stats_percpu);
err_destroy_table:
ovs_flow_tbl_destroy(genl_dereference(dp->table));
err_free_dp:
release_net(ovs_dp_get_net(dp));
kfree(dp);
err_put_module:
module_put(THIS_MODULE);
err_unlock_rtnl:
rtnl_unlock();
err:
return err;
}
static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
/* Called with genl_mutex. */
static void __dp_destroy(struct datapath *dp)
{
struct vport *vport, *next_vport;
struct sk_buff *reply;
struct datapath *dp;
int err;
int i;
rtnl_lock();
dp = lookup_datapath(info->userhdr, info->attrs);
err = PTR_ERR(dp);
if (IS_ERR(dp))
goto exit_unlock;
reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
info->snd_seq, OVS_DP_CMD_DEL);
err = PTR_ERR(reply);
if (IS_ERR(reply))
goto exit_unlock;
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
struct vport *vport;
struct hlist_node *node, *n;
list_for_each_entry_safe(vport, next_vport, &dp->port_list, node)
if (vport->port_no != OVSP_LOCAL)
ovs_dp_detach_port(vport);
hlist_for_each_entry_safe(vport, node, n, &dp->ports[i], dp_hash_node)
if (vport->port_no != OVSP_LOCAL)
ovs_dp_detach_port(vport);
}
list_del(&dp->list_node);
ovs_dp_detach_port(rtnl_dereference(dp->ports[OVSP_LOCAL]));
ovs_dp_detach_port(ovs_vport_rtnl(dp, OVSP_LOCAL));
/* rtnl_unlock() will wait until all the references to devices that
* are pending unregistration have been dropped. We do it here to
@ -1345,17 +1381,32 @@ static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
rtnl_unlock();
call_rcu(&dp->rcu, destroy_dp_rcu);
module_put(THIS_MODULE);
}
static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *reply;
struct datapath *dp;
int err;
dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
err = PTR_ERR(dp);
if (IS_ERR(dp))
return err;
reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
info->snd_seq, OVS_DP_CMD_DEL);
err = PTR_ERR(reply);
if (IS_ERR(reply))
return err;
__dp_destroy(dp);
genl_notify(reply, genl_info_net(info), info->snd_pid,
ovs_dp_datapath_multicast_group.id, info->nlhdr,
GFP_KERNEL);
return 0;
exit_unlock:
rtnl_unlock();
return err;
}
static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
@ -1364,7 +1415,7 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
struct datapath *dp;
int err;
dp = lookup_datapath(info->userhdr, info->attrs);
dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
if (IS_ERR(dp))
return PTR_ERR(dp);
@ -1372,7 +1423,7 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
info->snd_seq, OVS_DP_CMD_NEW);
if (IS_ERR(reply)) {
err = PTR_ERR(reply);
netlink_set_err(init_net.genl_sock, 0,
netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
ovs_dp_datapath_multicast_group.id, err);
return 0;
}
@ -1389,7 +1440,7 @@ static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
struct sk_buff *reply;
struct datapath *dp;
dp = lookup_datapath(info->userhdr, info->attrs);
dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
if (IS_ERR(dp))
return PTR_ERR(dp);
@ -1403,11 +1454,12 @@ static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
struct datapath *dp;
int skip = cb->args[0];
int i = 0;
list_for_each_entry(dp, &dps, list_node) {
list_for_each_entry(dp, &ovs_net->dps, list_node) {
if (i >= skip &&
ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
@ -1459,7 +1511,8 @@ static struct genl_family dp_vport_genl_family = {
.hdrsize = sizeof(struct ovs_header),
.name = OVS_VPORT_FAMILY,
.version = OVS_VPORT_VERSION,
.maxattr = OVS_VPORT_ATTR_MAX
.maxattr = OVS_VPORT_ATTR_MAX,
.netnsok = true
};
struct genl_multicast_group ovs_dp_vport_multicast_group = {
@ -1525,14 +1578,15 @@ struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid,
}
/* Called with RTNL lock or RCU read lock. */
static struct vport *lookup_vport(struct ovs_header *ovs_header,
static struct vport *lookup_vport(struct net *net,
struct ovs_header *ovs_header,
struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
{
struct datapath *dp;
struct vport *vport;
if (a[OVS_VPORT_ATTR_NAME]) {
vport = ovs_vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME]));
vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
if (!vport)
return ERR_PTR(-ENODEV);
if (ovs_header->dp_ifindex &&
@ -1545,11 +1599,11 @@ static struct vport *lookup_vport(struct ovs_header *ovs_header,
if (port_no >= DP_MAX_PORTS)
return ERR_PTR(-EFBIG);
dp = get_dp(ovs_header->dp_ifindex);
dp = get_dp(net, ovs_header->dp_ifindex);
if (!dp)
return ERR_PTR(-ENODEV);
vport = rcu_dereference_rtnl(dp->ports[port_no]);
vport = ovs_vport_rtnl_rcu(dp, port_no);
if (!vport)
return ERR_PTR(-ENOENT);
return vport;
@ -1574,7 +1628,7 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
goto exit;
rtnl_lock();
dp = get_dp(ovs_header->dp_ifindex);
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
err = -ENODEV;
if (!dp)
goto exit_unlock;
@ -1586,7 +1640,7 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
if (port_no >= DP_MAX_PORTS)
goto exit_unlock;
vport = rtnl_dereference(dp->ports[port_no]);
vport = ovs_vport_rtnl_rcu(dp, port_no);
err = -EBUSY;
if (vport)
goto exit_unlock;
@ -1596,7 +1650,7 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
err = -EFBIG;
goto exit_unlock;
}
vport = rtnl_dereference(dp->ports[port_no]);
vport = ovs_vport_rtnl(dp, port_no);
if (!vport)
break;
}
@ -1638,7 +1692,7 @@ static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
int err;
rtnl_lock();
vport = lookup_vport(info->userhdr, a);
vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
err = PTR_ERR(vport);
if (IS_ERR(vport))
goto exit_unlock;
@ -1658,7 +1712,7 @@ static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
OVS_VPORT_CMD_NEW);
if (IS_ERR(reply)) {
netlink_set_err(init_net.genl_sock, 0,
netlink_set_err(sock_net(skb->sk)->genl_sock, 0,
ovs_dp_vport_multicast_group.id, PTR_ERR(reply));
goto exit_unlock;
}
@ -1679,7 +1733,7 @@ static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
int err;
rtnl_lock();
vport = lookup_vport(info->userhdr, a);
vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
err = PTR_ERR(vport);
if (IS_ERR(vport))
goto exit_unlock;
@ -1714,7 +1768,7 @@ static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
int err;
rcu_read_lock();
vport = lookup_vport(ovs_header, a);
vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
err = PTR_ERR(vport);
if (IS_ERR(vport))
goto exit_unlock;
@ -1738,54 +1792,39 @@ static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
struct datapath *dp;
u32 port_no;
int retval;
int bucket = cb->args[0], skip = cb->args[1];
int i, j = 0;
dp = get_dp(ovs_header->dp_ifindex);
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
if (!dp)
return -ENODEV;
rcu_read_lock();
for (port_no = cb->args[0]; port_no < DP_MAX_PORTS; port_no++) {
for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
struct vport *vport;
struct hlist_node *n;
vport = rcu_dereference(dp->ports[port_no]);
if (!vport)
continue;
j = 0;
hlist_for_each_entry_rcu(vport, n, &dp->ports[i], dp_hash_node) {
if (j >= skip &&
ovs_vport_cmd_fill_info(vport, skb,
NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI,
OVS_VPORT_CMD_NEW) < 0)
goto out;
if (ovs_vport_cmd_fill_info(vport, skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
OVS_VPORT_CMD_NEW) < 0)
break;
j++;
}
skip = 0;
}
out:
rcu_read_unlock();
cb->args[0] = port_no;
retval = skb->len;
cb->args[0] = i;
cb->args[1] = j;
return retval;
}
static void rehash_flow_table(struct work_struct *work)
{
struct datapath *dp;
genl_lock();
list_for_each_entry(dp, &dps, list_node) {
struct flow_table *old_table = genl_dereference(dp->table);
struct flow_table *new_table;
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);
}
}
genl_unlock();
schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL);
return skb->len;
}
static struct genl_ops dp_vport_genl_ops[] = {
@ -1872,6 +1911,59 @@ error:
return err;
}
static void rehash_flow_table(struct work_struct *work)
{
struct datapath *dp;
struct net *net;
genl_lock();
rtnl_lock();
for_each_net(net) {
struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
list_for_each_entry(dp, &ovs_net->dps, list_node) {
struct flow_table *old_table = genl_dereference(dp->table);
struct flow_table *new_table;
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);
}
}
}
rtnl_unlock();
genl_unlock();
schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL);
}
static int __net_init ovs_init_net(struct net *net)
{
struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
INIT_LIST_HEAD(&ovs_net->dps);
return 0;
}
static void __net_exit ovs_exit_net(struct net *net)
{
struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
struct datapath *dp, *dp_next;
genl_lock();
list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
__dp_destroy(dp);
genl_unlock();
}
static struct pernet_operations ovs_net_ops = {
.init = ovs_init_net,
.exit = ovs_exit_net,
.id = &ovs_net_id,
.size = sizeof(struct ovs_net),
};
static int __init dp_init(void)
{
struct sk_buff *dummy_skb;
@ -1889,10 +1981,14 @@ static int __init dp_init(void)
if (err)
goto error_flow_exit;
err = register_netdevice_notifier(&ovs_dp_device_notifier);
err = register_pernet_device(&ovs_net_ops);
if (err)
goto error_vport_exit;
err = register_netdevice_notifier(&ovs_dp_device_notifier);
if (err)
goto error_netns_exit;
err = dp_register_genl();
if (err < 0)
goto error_unreg_notifier;
@ -1903,6 +1999,8 @@ static int __init dp_init(void)
error_unreg_notifier:
unregister_netdevice_notifier(&ovs_dp_device_notifier);
error_netns_exit:
unregister_pernet_device(&ovs_net_ops);
error_vport_exit:
ovs_vport_exit();
error_flow_exit:
@ -1914,9 +2012,10 @@ error:
static void dp_cleanup(void)
{
cancel_delayed_work_sync(&rehash_flow_wq);
rcu_barrier();
dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
unregister_netdevice_notifier(&ovs_dp_device_notifier);
unregister_pernet_device(&ovs_net_ops);
rcu_barrier();
ovs_vport_exit();
ovs_flow_exit();
}

50
net/openvswitch/datapath.h
View File

@ -27,10 +27,11 @@
#include <linux/u64_stats_sync.h>
#include "flow.h"
#include "vport.h"
struct vport;
#define DP_MAX_PORTS USHRT_MAX
#define DP_VPORT_HASH_BUCKETS 1024
#define DP_MAX_PORTS 1024
#define SAMPLE_ACTION_DEPTH 3
/**
@ -58,11 +59,10 @@ struct dp_stats_percpu {
* @list_node: Element in global 'dps' list.
* @n_flows: Number of flows currently in flow table.
* @table: Current flow table. Protected by genl_lock and RCU.
* @ports: Map from port number to &struct vport. %OVSP_LOCAL port
* always exists, other ports may be %NULL. Protected by RTNL and RCU.
* @port_list: List of all ports in @ports in arbitrary order. RTNL required
* to iterate or modify.
* @ports: Hash table for ports. %OVSP_LOCAL port always exists. Protected by
* RTNL and RCU.
* @stats_percpu: Per-CPU datapath statistics.
* @net: Reference to net namespace.
*
* Context: See the comment on locking at the top of datapath.c for additional
* locking information.
@ -75,13 +75,37 @@ struct datapath {
struct flow_table __rcu *table;
/* Switch ports. */
struct vport __rcu *ports[DP_MAX_PORTS];
struct list_head port_list;
struct hlist_head *ports;
/* Stats. */
struct dp_stats_percpu __percpu *stats_percpu;
#ifdef CONFIG_NET_NS
/* Network namespace ref. */
struct net *net;
#endif
};
struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no);
static inline struct vport *ovs_vport_rcu(const struct datapath *dp, int port_no)
{
WARN_ON_ONCE(!rcu_read_lock_held());
return ovs_lookup_vport(dp, port_no);
}
static inline struct vport *ovs_vport_rtnl_rcu(const struct datapath *dp, int port_no)
{
WARN_ON_ONCE(!rcu_read_lock_held() && !rtnl_is_locked());
return ovs_lookup_vport(dp, port_no);
}
static inline struct vport *ovs_vport_rtnl(const struct datapath *dp, int port_no)
{
ASSERT_RTNL();
return ovs_lookup_vport(dp, port_no);
}
/**
* struct ovs_skb_cb - OVS data in skb CB
* @flow: The flow associated with this packet. May be %NULL if no flow.
@ -108,6 +132,16 @@ struct dp_upcall_info {
u32 pid;
};
static inline struct net *ovs_dp_get_net(struct datapath *dp)
{
return read_pnet(&dp->net);
}
static inline void ovs_dp_set_net(struct datapath *dp, struct net *net)
{
write_pnet(&dp->net, net);
}
extern struct notifier_block ovs_dp_device_notifier;
extern struct genl_multicast_group ovs_dp_vport_multicast_group;

8
net/openvswitch/dp_notify.c
View File

@ -41,19 +41,21 @@ static int dp_device_event(struct notifier_block *unused, unsigned long event,
case NETDEV_UNREGISTER:
if (!ovs_is_internal_dev(dev)) {
struct sk_buff *notify;
struct datapath *dp = vport->dp;
notify = ovs_vport_cmd_build_info(vport, 0, 0,
OVS_VPORT_CMD_DEL);
ovs_dp_detach_port(vport);
if (IS_ERR(notify)) {
netlink_set_err(init_net.genl_sock, 0,
netlink_set_err(ovs_dp_get_net(dp)->genl_sock, 0,
ovs_dp_vport_multicast_group.id,
PTR_ERR(notify));
break;
}
genlmsg_multicast(notify, 0, ovs_dp_vport_multicast_group.id,
GFP_KERNEL);
genlmsg_multicast_netns(ovs_dp_get_net(dp), notify, 0,
ovs_dp_vport_multicast_group.id,
GFP_KERNEL);
}
break;
}

11
net/openvswitch/flow.c
View File

@ -203,10 +203,7 @@ struct sw_flow_actions *ovs_flow_actions_alloc(const struct nlattr *actions)
int actions_len = nla_len(actions);
struct sw_flow_actions *sfa;
/* At least DP_MAX_PORTS actions are required to be able to flood a
* packet to every port. Factor of 2 allows for setting VLAN tags,
* etc. */
if (actions_len > 2 * DP_MAX_PORTS * nla_total_size(4))
if (actions_len > MAX_ACTIONS_BUFSIZE)
return ERR_PTR(-EINVAL);
sfa = kmalloc(sizeof(*sfa) + actions_len, GFP_KERNEL);
@ -992,7 +989,7 @@ int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
swkey->phy.in_port = in_port;
attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
} else {
swkey->phy.in_port = USHRT_MAX;
swkey->phy.in_port = DP_MAX_PORTS;
}
/* Data attributes. */
@ -1135,7 +1132,7 @@ int ovs_flow_metadata_from_nlattrs(u32 *priority, u16 *in_port,
const struct nlattr *nla;
int rem;
*in_port = USHRT_MAX;
*in_port = DP_MAX_PORTS;
*priority = 0;
nla_for_each_nested(nla, attr, rem) {
@ -1172,7 +1169,7 @@ int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb)
nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, swkey->phy.priority))
goto nla_put_failure;
if (swkey->phy.in_port != USHRT_MAX &&
if (swkey->phy.in_port != DP_MAX_PORTS &&
nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, swkey->phy.in_port))
goto nla_put_failure;

3
net/openvswitch/flow.h
View File

@ -43,7 +43,7 @@ struct sw_flow_actions {
struct sw_flow_key {
struct {
u32 priority; /* Packet QoS priority. */
u16 in_port; /* Input switch port (or USHRT_MAX). */
u16 in_port; /* Input switch port (or DP_MAX_PORTS). */
} phy;
struct {
u8 src[ETH_ALEN]; /* Ethernet source address. */
@ -161,6 +161,7 @@ int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
int ovs_flow_metadata_from_nlattrs(u32 *priority, u16 *in_port,
const struct nlattr *);
#define MAX_ACTIONS_BUFSIZE (16 * 1024)
#define TBL_MIN_BUCKETS 1024
struct flow_table {

7
net/openvswitch/vport-internal_dev.c
View File

@ -144,7 +144,7 @@ static void do_setup(struct net_device *netdev)
netdev->tx_queue_len = 0;
netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
netdev->vlan_features = netdev->features;
netdev->features |= NETIF_F_HW_VLAN_TX;
@ -175,9 +175,14 @@ static struct vport *internal_dev_create(const struct vport_parms *parms)
goto error_free_vport;
}
dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
internal_dev = internal_dev_priv(netdev_vport->dev);
internal_dev->vport = vport;
/* Restrict bridge port to current netns. */
if (vport->port_no == OVSP_LOCAL)
netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
err = register_netdevice(netdev_vport->dev);
if (err)
goto error_free_netdev;

2
net/openvswitch/vport-netdev.c
View File

@ -83,7 +83,7 @@ static struct vport *netdev_create(const struct vport_parms *parms)
netdev_vport = netdev_vport_priv(vport);
netdev_vport->dev = dev_get_by_name(&init_net, parms->name);
netdev_vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), parms->name);
if (!netdev_vport->dev) {
err = -ENODEV;
goto error_free_vport;

23
net/openvswitch/vport.c
View File

@ -16,10 +16,10 @@
* 02110-1301, USA
*/
#include <linux/dcache.h>
#include <linux/etherdevice.h>
#include <linux/if.h>
#include <linux/if_vlan.h>
#include <linux/jhash.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/mutex.h>
@ -27,7 +27,9 @@
#include <linux/rcupdate.h>
#include <linux/rtnetlink.h>
#include <linux/compat.h>
#include <net/net_namespace.h>
#include "datapath.h"
#include "vport.h"
#include "vport-internal_dev.h"
@ -67,9 +69,9 @@ void ovs_vport_exit(void)
kfree(dev_table);
}
static struct hlist_head *hash_bucket(const char *name)
static struct hlist_head *hash_bucket(struct net *net, const char *name)
{
unsigned int hash = full_name_hash(name, strlen(name));
unsigned int hash = jhash(name, strlen(name), (unsigned long) net);
return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)];
}
@ -80,14 +82,15 @@ static struct hlist_head *hash_bucket(const char *name)
*
* Must be called with RTNL or RCU read lock.
*/
struct vport *ovs_vport_locate(const char *name)
struct vport *ovs_vport_locate(struct net *net, const char *name)
{
struct hlist_head *bucket = hash_bucket(name);
struct hlist_head *bucket = hash_bucket(net, name);
struct vport *vport;
struct hlist_node *node;
hlist_for_each_entry_rcu(vport, node, bucket, hash_node)
if (!strcmp(name, vport->ops->get_name(vport)))
if (!strcmp(name, vport->ops->get_name(vport)) &&
net_eq(ovs_dp_get_net(vport->dp), net))
return vport;
return NULL;
@ -124,6 +127,7 @@ struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
vport->port_no = parms->port_no;
vport->upcall_pid = parms->upcall_pid;
vport->ops = ops;
INIT_HLIST_NODE(&vport->dp_hash_node);
vport->percpu_stats = alloc_percpu(struct vport_percpu_stats);
if (!vport->percpu_stats) {
@ -170,14 +174,17 @@ struct vport *ovs_vport_add(const struct vport_parms *parms)
for (i = 0; i < ARRAY_SIZE(vport_ops_list); i++) {
if (vport_ops_list[i]->type == parms->type) {
struct hlist_head *bucket;
vport = vport_ops_list[i]->create(parms);
if (IS_ERR(vport)) {
err = PTR_ERR(vport);
goto out;
}
hlist_add_head_rcu(&vport->hash_node,
hash_bucket(vport->ops->get_name(vport)));
bucket = hash_bucket(ovs_dp_get_net(vport->dp),
vport->ops->get_name(vport));
hlist_add_head_rcu(&vport->hash_node, bucket);
return vport;
}
}

7
net/openvswitch/vport.h
View File

@ -20,6 +20,7 @@
#define VPORT_H 1
#include <linux/list.h>
#include <linux/netlink.h>
#include <linux/openvswitch.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
@ -38,7 +39,7 @@ void ovs_vport_exit(void);
struct vport *ovs_vport_add(const struct vport_parms *);
void ovs_vport_del(struct vport *);
struct vport *ovs_vport_locate(const char *name);
struct vport *ovs_vport_locate(struct net *net, const char *name);
void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
@ -69,10 +70,10 @@ struct vport_err_stats {
* @rcu: RCU callback head for deferred destruction.
* @port_no: Index into @dp's @ports array.
* @dp: Datapath to which this port belongs.
* @node: Element in @dp's @port_list.
* @upcall_pid: The Netlink port to use for packets received on this port that
* miss the flow table.
* @hash_node: Element in @dev_table hash table in vport.c.
* @dp_hash_node: Element in @datapath->ports hash table in datapath.c.
* @ops: Class structure.
* @percpu_stats: Points to per-CPU statistics used and maintained by vport
* @stats_lock: Protects @err_stats;
@ -82,10 +83,10 @@ struct vport {
struct rcu_head rcu;
u16 port_no;
struct datapath *dp;
struct list_head node;
u32 upcall_pid;
struct hlist_node hash_node;
struct hlist_node dp_hash_node;
const struct vport_ops *ops;
struct vport_percpu_stats __percpu *percpu_stats;