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openvswitch: Add support for network namespaces.

Browse source 
Following patch adds support for network namespace to openvswitch.
Since it must release devices when namespaces are destroyed, a
side effect of this patch is that the module no longer keeps a
refcount but instead cleans up any state when it is unloaded.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Pravin B Shelar 2012-02-22 19:58:59 -08:00 • committed by Jesse Gross
parent 0d7614f09c
commit 46df7b8145
7 changed files with 207 additions and 123 deletions
Download patch file Download diff file Expand all files Collapse all files

269
net/openvswitch/datapath.c
View file

@ -49,11 +49,28 @@
#include <linux/dmi.h> #include <linux/dmi.h>
#include <linux/workqueue.h> #include <linux/workqueue.h>
#include <net/genetlink.h> #include <net/genetlink.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include "datapath.h" #include "datapath.h"
#include "flow.h" #include "flow.h"
#include "vport-internal_dev.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: * DOC: Locking:
* *
@ -71,29 +88,21 @@
* each other. * 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 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 *); 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 *); const struct dp_upcall_info *);
/* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */ /* 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 datapath *dp = NULL;
struct net_device *dev; struct net_device *dev;
rcu_read_lock(); rcu_read_lock();
dev = dev_get_by_index_rcu(&init_net, dp_ifindex); dev = dev_get_by_index_rcu(net, dp_ifindex);
if (dev) { if (dev) {
struct vport *vport = ovs_internal_dev_get_vport(dev); struct vport *vport = ovs_internal_dev_get_vport(dev);
if (vport) if (vport)
@ -135,6 +144,7 @@ static void destroy_dp_rcu(struct rcu_head *rcu)
ovs_flow_tbl_destroy((__force struct flow_table *)dp->table); ovs_flow_tbl_destroy((__force struct flow_table *)dp->table);
free_percpu(dp->stats_percpu); free_percpu(dp->stats_percpu);
release_net(ovs_dp_get_net(dp));
kfree(dp); kfree(dp);
} }
@ -220,11 +230,12 @@ static struct genl_family dp_packet_genl_family = {
.hdrsize = sizeof(struct ovs_header), .hdrsize = sizeof(struct ovs_header),
.name = OVS_PACKET_FAMILY, .name = OVS_PACKET_FAMILY,
.version = OVS_PACKET_VERSION, .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, 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; struct dp_stats_percpu *stats;
int dp_ifindex; int dp_ifindex;
@ -242,9 +253,9 @@ int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
} }
if (!skb_is_gso(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 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) if (err)
goto err; goto err;
@ -260,7 +271,8 @@ err:
return 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) const struct dp_upcall_info *upcall_info)
{ {
unsigned short gso_type = skb_shinfo(skb)->gso_type; unsigned short gso_type = skb_shinfo(skb)->gso_type;
@ -276,7 +288,7 @@ static int queue_gso_packets(int dp_ifindex, struct sk_buff *skb,
/* Queue all of the segments. */ /* Queue all of the segments. */
skb = segs; skb = segs;
do { do {
err = queue_userspace_packet(dp_ifindex, skb, upcall_info); err = queue_userspace_packet(net, dp_ifindex, skb, upcall_info);
if (err) if (err)
break; break;
@ -306,7 +318,8 @@ static int queue_gso_packets(int dp_ifindex, struct sk_buff *skb,
return err; 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) const struct dp_upcall_info *upcall_info)
{ {
struct ovs_header *upcall; struct ovs_header *upcall;
@ -362,7 +375,7 @@ static int queue_userspace_packet(int dp_ifindex, struct sk_buff *skb,
skb_copy_and_csum_dev(skb, nla_data(nla)); 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: out:
kfree_skb(nskb); kfree_skb(nskb);
@ -370,15 +383,10 @@ out:
} }
/* Called with genl_mutex. */ /* 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 *old_table;
struct flow_table *new_table; struct flow_table *new_table;
struct datapath *dp;
dp = get_dp(dp_ifindex);
if (!dp)
return -ENODEV;
old_table = genl_dereference(dp->table); old_table = genl_dereference(dp->table);
new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS); new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS);
@ -668,7 +676,7 @@ static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
packet->priority = flow->key.phy.priority; packet->priority = flow->key.phy.priority;
rcu_read_lock(); rcu_read_lock();
dp = get_dp(ovs_header->dp_ifindex); dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
err = -ENODEV; err = -ENODEV;
if (!dp) if (!dp)
goto err_unlock; goto err_unlock;
@ -742,7 +750,8 @@ static struct genl_family dp_flow_genl_family = {
.hdrsize = sizeof(struct ovs_header), .hdrsize = sizeof(struct ovs_header),
.name = OVS_FLOW_FAMILY, .name = OVS_FLOW_FAMILY,
.version = OVS_FLOW_VERSION, .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 = { static struct genl_multicast_group ovs_dp_flow_multicast_group = {
@ -894,7 +903,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
goto error; goto error;
} }
dp = get_dp(ovs_header->dp_ifindex); dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
error = -ENODEV; error = -ENODEV;
if (!dp) if (!dp)
goto error; goto error;
@ -995,7 +1004,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
ovs_dp_flow_multicast_group.id, info->nlhdr, ovs_dp_flow_multicast_group.id, info->nlhdr,
GFP_KERNEL); GFP_KERNEL);
else 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)); ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
return 0; return 0;
@ -1023,7 +1032,7 @@ static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
if (err) if (err)
return err; return err;
dp = get_dp(ovs_header->dp_ifindex); dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
if (!dp) if (!dp)
return -ENODEV; return -ENODEV;
@ -1052,16 +1061,17 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
int err; int err;
int key_len; int key_len;
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
if (!dp)
return -ENODEV;
if (!a[OVS_FLOW_ATTR_KEY]) 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]); err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
if (err) if (err)
return err; return err;
dp = get_dp(ovs_header->dp_ifindex);
if (!dp)
return -ENODEV;
table = genl_dereference(dp->table); table = genl_dereference(dp->table);
flow = ovs_flow_tbl_lookup(table, &key, key_len); flow = ovs_flow_tbl_lookup(table, &key, key_len);
if (!flow) if (!flow)
@ -1090,7 +1100,7 @@ static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
struct datapath *dp; struct datapath *dp;
struct flow_table *table; struct flow_table *table;
dp = get_dp(ovs_header->dp_ifindex); dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
if (!dp) if (!dp)
return -ENODEV; return -ENODEV;
@ -1152,7 +1162,8 @@ static struct genl_family dp_datapath_genl_family = {
.hdrsize = sizeof(struct ovs_header), .hdrsize = sizeof(struct ovs_header),
.name = OVS_DATAPATH_FAMILY, .name = OVS_DATAPATH_FAMILY,
.version = OVS_DATAPATH_VERSION, .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 = { static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
@ -1210,18 +1221,19 @@ static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid,
} }
/* Called with genl_mutex and optionally with RTNL lock also. */ /* 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 nlattr *a[OVS_DP_ATTR_MAX + 1])
{ {
struct datapath *dp; struct datapath *dp;
if (!a[OVS_DP_ATTR_NAME]) if (!a[OVS_DP_ATTR_NAME])
dp = get_dp(ovs_header->dp_ifindex); dp = get_dp(net, ovs_header->dp_ifindex);
else { else {
struct vport *vport; struct vport *vport;
rcu_read_lock(); 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; dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
rcu_read_unlock(); rcu_read_unlock();
} }
@ -1235,6 +1247,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
struct sk_buff *reply; struct sk_buff *reply;
struct datapath *dp; struct datapath *dp;
struct vport *vport; struct vport *vport;
struct ovs_net *ovs_net;
int err; int err;
err = -EINVAL; err = -EINVAL;
@ -1242,15 +1255,14 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
goto err; goto err;
rtnl_lock(); rtnl_lock();
err = -ENODEV;
if (!try_module_get(THIS_MODULE))
goto err_unlock_rtnl;
err = -ENOMEM; err = -ENOMEM;
dp = kzalloc(sizeof(*dp), GFP_KERNEL); dp = kzalloc(sizeof(*dp), GFP_KERNEL);
if (dp == NULL) if (dp == NULL)
goto err_put_module; goto err_unlock_rtnl;
INIT_LIST_HEAD(&dp->port_list); INIT_LIST_HEAD(&dp->port_list);
ovs_dp_set_net(dp, hold_net(sock_net(skb->sk)));
/* Allocate table. */ /* Allocate table. */
err = -ENOMEM; err = -ENOMEM;
@ -1287,7 +1299,8 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
if (IS_ERR(reply)) if (IS_ERR(reply))
goto err_destroy_local_port; 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(); rtnl_unlock();
genl_notify(reply, genl_info_net(info), info->snd_pid, genl_notify(reply, genl_info_net(info), info->snd_pid,
@ -1302,34 +1315,20 @@ err_destroy_percpu:
err_destroy_table: err_destroy_table:
ovs_flow_tbl_destroy(genl_dereference(dp->table)); ovs_flow_tbl_destroy(genl_dereference(dp->table));
err_free_dp: err_free_dp:
release_net(ovs_dp_get_net(dp));
kfree(dp); kfree(dp);
err_put_module:
module_put(THIS_MODULE);
err_unlock_rtnl: err_unlock_rtnl:
rtnl_unlock(); rtnl_unlock();
err: err:
return 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 vport *vport, *next_vport;
struct sk_buff *reply;
struct datapath *dp;
int err;
rtnl_lock(); 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;
list_for_each_entry_safe(vport, next_vport, &dp->port_list, node) list_for_each_entry_safe(vport, next_vport, &dp->port_list, node)
if (vport->port_no != OVSP_LOCAL) if (vport->port_no != OVSP_LOCAL)
ovs_dp_detach_port(vport); ovs_dp_detach_port(vport);
@ -1345,17 +1344,32 @@ static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
rtnl_unlock(); rtnl_unlock();
call_rcu(&dp->rcu, destroy_dp_rcu); 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, genl_notify(reply, genl_info_net(info), info->snd_pid,
ovs_dp_datapath_multicast_group.id, info->nlhdr, ovs_dp_datapath_multicast_group.id, info->nlhdr,
GFP_KERNEL); GFP_KERNEL);
return 0; return 0;
exit_unlock:
rtnl_unlock();
return err;
} }
static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
@ -1364,7 +1378,7 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
struct datapath *dp; struct datapath *dp;
int err; int err;
dp = lookup_datapath(info->userhdr, info->attrs); dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
if (IS_ERR(dp)) if (IS_ERR(dp))
return PTR_ERR(dp); return PTR_ERR(dp);
@ -1372,7 +1386,7 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
info->snd_seq, OVS_DP_CMD_NEW); info->snd_seq, OVS_DP_CMD_NEW);
if (IS_ERR(reply)) { if (IS_ERR(reply)) {
err = PTR_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); ovs_dp_datapath_multicast_group.id, err);
return 0; return 0;
} }
@ -1389,7 +1403,7 @@ static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
struct sk_buff *reply; struct sk_buff *reply;
struct datapath *dp; 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)) if (IS_ERR(dp))
return PTR_ERR(dp); return PTR_ERR(dp);
@ -1403,11 +1417,12 @@ 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) 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; struct datapath *dp;
int skip = cb->args[0]; int skip = cb->args[0];
int i = 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 && if (i >= skip &&
ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid, ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh->nlmsg_seq, NLM_F_MULTI,
@ -1459,7 +1474,8 @@ static struct genl_family dp_vport_genl_family = {
.hdrsize = sizeof(struct ovs_header), .hdrsize = sizeof(struct ovs_header),
.name = OVS_VPORT_FAMILY, .name = OVS_VPORT_FAMILY,
.version = OVS_VPORT_VERSION, .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 = { struct genl_multicast_group ovs_dp_vport_multicast_group = {
@ -1525,14 +1541,15 @@ struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid,
} }
/* Called with RTNL lock or RCU read lock. */ /* 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 nlattr *a[OVS_VPORT_ATTR_MAX + 1])
{ {
struct datapath *dp; struct datapath *dp;
struct vport *vport; struct vport *vport;
if (a[OVS_VPORT_ATTR_NAME]) { 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) if (!vport)
return ERR_PTR(-ENODEV); return ERR_PTR(-ENODEV);
if (ovs_header->dp_ifindex && if (ovs_header->dp_ifindex &&
@ -1545,7 +1562,7 @@ static struct vport *lookup_vport(struct ovs_header *ovs_header,
if (port_no >= DP_MAX_PORTS) if (port_no >= DP_MAX_PORTS)
return ERR_PTR(-EFBIG); return ERR_PTR(-EFBIG);
dp = get_dp(ovs_header->dp_ifindex); dp = get_dp(net, ovs_header->dp_ifindex);
if (!dp) if (!dp)
return ERR_PTR(-ENODEV); return ERR_PTR(-ENODEV);
@ -1574,7 +1591,7 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
goto exit; goto exit;
rtnl_lock(); rtnl_lock();
dp = get_dp(ovs_header->dp_ifindex); dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
err = -ENODEV; err = -ENODEV;
if (!dp) if (!dp)
goto exit_unlock; goto exit_unlock;
@ -1638,7 +1655,7 @@ static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
int err; int err;
rtnl_lock(); rtnl_lock();
vport = lookup_vport(info->userhdr, a); vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
err = PTR_ERR(vport); err = PTR_ERR(vport);
if (IS_ERR(vport)) if (IS_ERR(vport))
goto exit_unlock; goto exit_unlock;
@ -1658,7 +1675,7 @@ 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, reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
OVS_VPORT_CMD_NEW); OVS_VPORT_CMD_NEW);
if (IS_ERR(reply)) { 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)); ovs_dp_vport_multicast_group.id, PTR_ERR(reply));
goto exit_unlock; goto exit_unlock;
} }
@ -1679,7 +1696,7 @@ static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
int err; int err;
rtnl_lock(); rtnl_lock();
vport = lookup_vport(info->userhdr, a); vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
err = PTR_ERR(vport); err = PTR_ERR(vport);
if (IS_ERR(vport)) if (IS_ERR(vport))
goto exit_unlock; goto exit_unlock;
@ -1714,7 +1731,7 @@ static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
int err; int err;
rcu_read_lock(); rcu_read_lock();
vport = lookup_vport(ovs_header, a); vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
err = PTR_ERR(vport); err = PTR_ERR(vport);
if (IS_ERR(vport)) if (IS_ERR(vport))
goto exit_unlock; goto exit_unlock;
@ -1741,7 +1758,7 @@ static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
u32 port_no; u32 port_no;
int retval; int retval;
dp = get_dp(ovs_header->dp_ifindex); dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
if (!dp) if (!dp)
return -ENODEV; return -ENODEV;
@ -1766,28 +1783,6 @@ static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
return retval; 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);
}
static struct genl_ops dp_vport_genl_ops[] = { static struct genl_ops dp_vport_genl_ops[] = {
{ .cmd = OVS_VPORT_CMD_NEW, { .cmd = OVS_VPORT_CMD_NEW,
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
@ -1872,6 +1867,59 @@ error:
return err; 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) static int __init dp_init(void)
{ {
struct sk_buff *dummy_skb; struct sk_buff *dummy_skb;
@ -1889,10 +1937,14 @@ static int __init dp_init(void)
if (err) if (err)
goto error_flow_exit; goto error_flow_exit;
err = register_netdevice_notifier(&ovs_dp_device_notifier); err = register_pernet_device(&ovs_net_ops);
if (err) if (err)
goto error_vport_exit; goto error_vport_exit;
err = register_netdevice_notifier(&ovs_dp_device_notifier);
if (err)
goto error_netns_exit;
err = dp_register_genl(); err = dp_register_genl();
if (err < 0) if (err < 0)
goto error_unreg_notifier; goto error_unreg_notifier;
@ -1903,6 +1955,8 @@ static int __init dp_init(void)
error_unreg_notifier: error_unreg_notifier:
unregister_netdevice_notifier(&ovs_dp_device_notifier); unregister_netdevice_notifier(&ovs_dp_device_notifier);
error_netns_exit:
unregister_pernet_device(&ovs_net_ops);
error_vport_exit: error_vport_exit:
ovs_vport_exit(); ovs_vport_exit();
error_flow_exit: error_flow_exit:
@ -1914,9 +1968,10 @@ error:
static void dp_cleanup(void) static void dp_cleanup(void)
{ {
cancel_delayed_work_sync(&rehash_flow_wq); cancel_delayed_work_sync(&rehash_flow_wq);
rcu_barrier();
dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
unregister_netdevice_notifier(&ovs_dp_device_notifier); unregister_netdevice_notifier(&ovs_dp_device_notifier);
unregister_pernet_device(&ovs_net_ops);
rcu_barrier();
ovs_vport_exit(); ovs_vport_exit();
ovs_flow_exit(); ovs_flow_exit();
} }

19
net/openvswitch/datapath.h
View file

@ -27,8 +27,7 @@
#include <linux/u64_stats_sync.h> #include <linux/u64_stats_sync.h>
#include "flow.h" #include "flow.h"
#include "vport.h"
struct vport;
#define DP_MAX_PORTS 1024 #define DP_MAX_PORTS 1024
#define SAMPLE_ACTION_DEPTH 3 #define SAMPLE_ACTION_DEPTH 3
@ -63,6 +62,7 @@ struct dp_stats_percpu {
* @port_list: List of all ports in @ports in arbitrary order. RTNL required * @port_list: List of all ports in @ports in arbitrary order. RTNL required
* to iterate or modify. * to iterate or modify.
* @stats_percpu: Per-CPU datapath statistics. * @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 * Context: See the comment on locking at the top of datapath.c for additional
* locking information. * locking information.
@ -80,6 +80,11 @@ struct datapath {
/* Stats. */ /* Stats. */
struct dp_stats_percpu __percpu *stats_percpu; struct dp_stats_percpu __percpu *stats_percpu;
#ifdef CONFIG_NET_NS
/* Network namespace ref. */
struct net *net;
#endif
}; };
/** /**
@ -108,6 +113,16 @@ struct dp_upcall_info {
u32 pid; 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 notifier_block ovs_dp_device_notifier;
extern struct genl_multicast_group ovs_dp_vport_multicast_group; 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: case NETDEV_UNREGISTER:
if (!ovs_is_internal_dev(dev)) { if (!ovs_is_internal_dev(dev)) {
struct sk_buff *notify; struct sk_buff *notify;
struct datapath *dp = vport->dp;
notify = ovs_vport_cmd_build_info(vport, 0, 0, notify = ovs_vport_cmd_build_info(vport, 0, 0,
OVS_VPORT_CMD_DEL); OVS_VPORT_CMD_DEL);
ovs_dp_detach_port(vport); ovs_dp_detach_port(vport);
if (IS_ERR(notify)) { 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, ovs_dp_vport_multicast_group.id,
PTR_ERR(notify)); PTR_ERR(notify));
break; break;
} }
genlmsg_multicast(notify, 0, ovs_dp_vport_multicast_group.id, genlmsg_multicast_netns(ovs_dp_get_net(dp), notify, 0,
GFP_KERNEL); ovs_dp_vport_multicast_group.id,
GFP_KERNEL);
} }
break; break;
} }

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->tx_queue_len = 0;
netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST | 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->vlan_features = netdev->features;
netdev->features |= NETIF_F_HW_VLAN_TX; 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; 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 = internal_dev_priv(netdev_vport->dev);
internal_dev->vport = vport; 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); err = register_netdevice(netdev_vport->dev);
if (err) if (err)
goto error_free_netdev; 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 = 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) { if (!netdev_vport->dev) {
err = -ENODEV; err = -ENODEV;
goto error_free_vport; goto error_free_vport;

22
net/openvswitch/vport.c
View file

@ -16,10 +16,10 @@
* 02110-1301, USA * 02110-1301, USA
*/ */
#include <linux/dcache.h>
#include <linux/etherdevice.h> #include <linux/etherdevice.h>
#include <linux/if.h> #include <linux/if.h>
#include <linux/if_vlan.h> #include <linux/if_vlan.h>
#include <linux/jhash.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/list.h> #include <linux/list.h>
#include <linux/mutex.h> #include <linux/mutex.h>
@ -27,7 +27,9 @@
#include <linux/rcupdate.h> #include <linux/rcupdate.h>
#include <linux/rtnetlink.h> #include <linux/rtnetlink.h>
#include <linux/compat.h> #include <linux/compat.h>
#include <net/net_namespace.h>
#include "datapath.h"
#include "vport.h" #include "vport.h"
#include "vport-internal_dev.h" #include "vport-internal_dev.h"
@ -67,9 +69,9 @@ void ovs_vport_exit(void)
kfree(dev_table); 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)]; 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. * 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 vport *vport;
struct hlist_node *node; struct hlist_node *node;
hlist_for_each_entry_rcu(vport, node, bucket, hash_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 vport;
return NULL; return NULL;
@ -170,14 +173,17 @@ struct vport *ovs_vport_add(const struct vport_parms *parms)
for (i = 0; i < ARRAY_SIZE(vport_ops_list); i++) { for (i = 0; i < ARRAY_SIZE(vport_ops_list); i++) {
if (vport_ops_list[i]->type == parms->type) { if (vport_ops_list[i]->type == parms->type) {
struct hlist_head *bucket;
vport = vport_ops_list[i]->create(parms); vport = vport_ops_list[i]->create(parms);
if (IS_ERR(vport)) { if (IS_ERR(vport)) {
err = PTR_ERR(vport); err = PTR_ERR(vport);
goto out; goto out;
} }
hlist_add_head_rcu(&vport->hash_node, bucket = hash_bucket(ovs_dp_get_net(vport->dp),
hash_bucket(vport->ops->get_name(vport))); vport->ops->get_name(vport));
hlist_add_head_rcu(&vport->hash_node, bucket);
return vport; return vport;
} }
} }

3
net/openvswitch/vport.h
View file

@ -20,6 +20,7 @@
#define VPORT_H 1 #define VPORT_H 1
#include <linux/list.h> #include <linux/list.h>
#include <linux/netlink.h>
#include <linux/openvswitch.h> #include <linux/openvswitch.h>
#include <linux/skbuff.h> #include <linux/skbuff.h>
#include <linux/spinlock.h> #include <linux/spinlock.h>
@ -38,7 +39,7 @@ void ovs_vport_exit(void);
struct vport *ovs_vport_add(const struct vport_parms *); struct vport *ovs_vport_add(const struct vport_parms *);
void ovs_vport_del(struct vport *); 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 *); void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);