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netdev_features: convert NETIF_F_NETNS_LOCAL to dev->netns_local

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"Interface can't change network namespaces" is rather an attribute,
not a feature, and it can't be changed via Ethtool.
Make it a "cold" private flag instead of a netdev_feature and free
one more bit.

Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Alexander Lobakin 2024-08-29 14:33:38 +02:00 committed by Paolo Abeni
parent 00d066a4d4
commit 05c1280a2b
34 changed files with 61 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Documentation/networking/net_cachelines/net_device.rst
View File

@ -166,6 +166,7 @@ unsigned:1 wol_enabled
unsigned:1 threaded - - napi_poll(napi_enable,dev_set_threaded)
unsigned_long:1 see_all_hwtstamp_requests
unsigned_long:1 change_proto_down
unsigned_long:1 netns_local
struct_list_head net_notifier_list
struct_macsec_ops* macsec_ops
struct_udp_tunnel_nic_info* udp_tunnel_nic_info

7
Documentation/networking/netdev-features.rst
View File

@ -139,13 +139,6 @@ chained skbs (skb->next/prev list).
Features contained in NETIF_F_SOFT_FEATURES are features of networking
stack. Driver should not change behaviour based on them.
* netns-local device
NETIF_F_NETNS_LOCAL is set for devices that are not allowed to move between
network namespaces (e.g. loopback).
Don't use it in drivers.
* VLAN challenged
NETIF_F_VLAN_CHALLENGED should be set for devices which can't cope with VLAN

4
Documentation/networking/switchdev.rst
View File

@ -137,10 +137,10 @@ would be sub-port 0 on port 1 on switch 1.
Port Features
^^^^^^^^^^^^^
NETIF_F_NETNS_LOCAL
dev->netns_local
If the switchdev driver (and device) only supports offloading of the default
network namespace (netns), the driver should set this feature flag to prevent
network namespace (netns), the driver should set this private flag to prevent
the port netdev from being moved out of the default netns. A netns-aware
driver/device would not set this flag and be responsible for partitioning
hardware to preserve netns containment. This means hardware cannot forward

2
drivers/net/amt.c
View File

@ -3099,8 +3099,8 @@ static void amt_link_setup(struct net_device *dev)
dev->addr_len = 0;
dev->priv_flags |= IFF_NO_QUEUE;
dev->lltx = true;
dev->netns_local = true;
dev->features |= NETIF_F_GSO_SOFTWARE;
dev->features |= NETIF_F_NETNS_LOCAL;
dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
dev->hw_features |= NETIF_F_FRAGLIST | NETIF_F_RXCSUM;
dev->hw_features |= NETIF_F_GSO_SOFTWARE;

6
drivers/net/bonding/bond_main.c
View File

@ -5930,6 +5930,9 @@ void bond_setup(struct net_device *bond_dev)
/* don't acquire bond device's netif_tx_lock when transmitting */
bond_dev->lltx = true;
/* Don't allow bond devices to change network namespaces. */
bond_dev->netns_local = true;
/* By default, we declare the bond to be fully
* VLAN hardware accelerated capable. Special
* care is taken in the various xmit functions
@ -5937,9 +5940,6 @@ void bond_setup(struct net_device *bond_dev)
* capable
*/
/* Don't allow bond devices to change network namespaces. */
bond_dev->features |= NETIF_F_NETNS_LOCAL;
bond_dev->hw_features = BOND_VLAN_FEATURES |
NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_CTAG_FILTER |

2
drivers/net/ethernet/adi/adin1110.c
View File

@ -1599,7 +1599,7 @@ static int adin1110_probe_netdevs(struct adin1110_priv *priv)
netdev->netdev_ops = &adin1110_netdev_ops;
netdev->ethtool_ops = &adin1110_ethtool_ops;
netdev->priv_flags |= IFF_UNICAST_FLT;
netdev->features |= NETIF_F_NETNS_LOCAL;
netdev->netns_local = true;
port_priv->phydev = get_phy_device(priv->mii_bus, i + 1, false);
if (IS_ERR(port_priv->phydev)) {

3
drivers/net/ethernet/marvell/prestera/prestera_main.c
View File

@ -633,7 +633,8 @@ static int prestera_port_create(struct prestera_switch *sw, u32 id)
if (err)
goto err_dl_port_register;
dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_HW_TC;
dev->features |= NETIF_F_HW_TC;
dev->netns_local = true;
dev->netdev_ops = &prestera_netdev_ops;
dev->ethtool_ops = &prestera_ethtool_ops;
SET_NETDEV_DEV(dev, sw->dev->dev);

4
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -4414,9 +4414,9 @@ static netdev_features_t mlx5e_fix_features(struct net_device *netdev,
if (mlx5e_is_uplink_rep(priv)) {
features = mlx5e_fix_uplink_rep_features(netdev, features);
features |= NETIF_F_NETNS_LOCAL;
netdev->netns_local = true;
} else {
features &= ~NETIF_F_NETNS_LOCAL;
netdev->netns_local = false;
}
mutex_unlock(&priv->state_lock);

3
drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
View File

@ -898,7 +898,8 @@ static void mlx5e_build_rep_netdev(struct net_device *netdev,
netdev->hw_features |= NETIF_F_RXCSUM;
netdev->features |= netdev->hw_features;
netdev->features |= NETIF_F_NETNS_LOCAL;
netdev->netns_local = true;
}
static int mlx5e_init_rep(struct mlx5_core_dev *mdev,

5
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@ -1676,10 +1676,11 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u16 local_port,
netif_carrier_off(dev);
dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG |
NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_TC;
dev->features |= NETIF_F_SG | NETIF_F_HW_VLAN_CTAG_FILTER |
NETIF_F_HW_TC;
dev->hw_features |= NETIF_F_HW_TC | NETIF_F_LOOPBACK;
dev->lltx = true;
dev->netns_local = true;
dev->min_mtu = ETH_MIN_MTU;
dev->max_mtu = MLXSW_PORT_MAX_MTU - MLXSW_PORT_ETH_FRAME_HDR;

3
drivers/net/ethernet/rocker/rocker_main.c
View File

@ -2575,7 +2575,8 @@ static int rocker_probe_port(struct rocker *rocker, unsigned int port_number)
netif_napi_add(dev, &rocker_port->napi_rx, rocker_port_poll_rx);
rocker_carrier_init(rocker_port);
dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_SG;
dev->features |= NETIF_F_SG;
dev->netns_local = true;
/* MTU range: 68 - 9000 */
dev->min_mtu = ROCKER_PORT_MIN_MTU;

3
drivers/net/ethernet/ti/cpsw_new.c
View File

@ -1407,7 +1407,8 @@ static int cpsw_create_ports(struct cpsw_common *cpsw)
cpsw->slaves[i].ndev = ndev;
ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_NETNS_LOCAL | NETIF_F_HW_TC;
NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_TC;
ndev->netns_local = true;
ndev->xdp_features = NETDEV_XDP_ACT_BASIC |
NETDEV_XDP_ACT_REDIRECT |

2
drivers/net/loopback.c
View File

@ -172,6 +172,7 @@ static void gen_lo_setup(struct net_device *dev,
dev->flags = IFF_LOOPBACK;
dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
dev->lltx = true;
dev->netns_local = true;
netif_keep_dst(dev);
dev->hw_features = NETIF_F_GSO_SOFTWARE;
dev->features = NETIF_F_SG | NETIF_F_FRAGLIST
@ -180,7 +181,6 @@ static void gen_lo_setup(struct net_device *dev,
| NETIF_F_RXCSUM
| NETIF_F_SCTP_CRC
| NETIF_F_HIGHDMA
| NETIF_F_NETNS_LOCAL
| NETIF_F_VLAN_CHALLENGED
| NETIF_F_LOOPBACK;
dev->ethtool_ops = eth_ops;

2
drivers/net/net_failover.c
View File

@ -734,7 +734,7 @@ struct failover *net_failover_create(struct net_device *standby_dev)
failover_dev->lltx = true;
/* Don't allow failover devices to change network namespaces. */
failover_dev->features |= NETIF_F_NETNS_LOCAL;
failover_dev->netns_local = true;
failover_dev->hw_features = FAILOVER_VLAN_FEATURES |
NETIF_F_HW_VLAN_CTAG_TX |

6
drivers/net/team/team_core.c
View File

@ -2191,10 +2191,10 @@ static void team_setup(struct net_device *dev)
dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
dev->lltx = true;
dev->features |= NETIF_F_GRO;
/* Don't allow team devices to change network namespaces. */
dev->features |= NETIF_F_NETNS_LOCAL;
dev->netns_local = true;
dev->features |= NETIF_F_GRO;
dev->hw_features = TEAM_VLAN_FEATURES |
NETIF_F_HW_VLAN_CTAG_RX |

2
drivers/net/vrf.c
View File

@ -1638,7 +1638,7 @@ static void vrf_setup(struct net_device *dev)
dev->lltx = true;
/* don't allow vrf devices to change network namespaces. */
dev->features |= NETIF_F_NETNS_LOCAL;
dev->netns_local = true;
/* does not make sense for a VLAN to be added to a vrf device */
dev->features |= NETIF_F_VLAN_CHALLENGED;

6
include/linux/netdev_features.h
View File

@ -25,7 +25,7 @@ enum {
NETIF_F_VLAN_CHALLENGED_BIT, /* Device cannot handle VLAN packets */
NETIF_F_GSO_BIT, /* Enable software GSO. */
__UNUSED_NETIF_F_12,
NETIF_F_NETNS_LOCAL_BIT, /* Does not change network namespaces */
__UNUSED_NETIF_F_13,
NETIF_F_GRO_BIT, /* Generic receive offload */
NETIF_F_LRO_BIT, /* large receive offload */
@ -121,7 +121,6 @@ enum {
#define NETIF_F_IPV6_CSUM __NETIF_F(IPV6_CSUM)
#define NETIF_F_LOOPBACK __NETIF_F(LOOPBACK)
#define NETIF_F_LRO __NETIF_F(LRO)
#define NETIF_F_NETNS_LOCAL __NETIF_F(NETNS_LOCAL)
#define NETIF_F_NOCACHE_COPY __NETIF_F(NOCACHE_COPY)
#define NETIF_F_NTUPLE __NETIF_F(NTUPLE)
#define NETIF_F_RXCSUM __NETIF_F(RXCSUM)
@ -190,8 +189,7 @@ static inline int find_next_netdev_feature(u64 feature, unsigned long start)
/* Features valid for ethtool to change */
/* = all defined minus driver/device-class-related */
#define NETIF_F_NEVER_CHANGE (NETIF_F_VLAN_CHALLENGED | \
NETIF_F_NETNS_LOCAL)
#define NETIF_F_NEVER_CHANGE NETIF_F_VLAN_CHALLENGED
/* remember that ((t)1 << t_BITS) is undefined in C99 */
#define NETIF_F_ETHTOOL_BITS ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \

2
include/linux/netdevice.h
View File

@ -1968,6 +1968,7 @@ enum netdev_reg_state {
* regardless of source, even if those aren't
* HWTSTAMP_SOURCE_NETDEV
* @change_proto_down: device supports setting carrier via IFLA_PROTO_DOWN
* @netns_local: interface can't change network namespaces
*
* @net_notifier_list: List of per-net netdev notifier block
* that follow this device when it is moved
@ -2361,6 +2362,7 @@ struct net_device {
/* priv_flags_slow, ungrouped to save space */
unsigned long see_all_hwtstamp_requests:1;
unsigned long change_proto_down:1;
unsigned long netns_local:1;
struct list_head net_notifier_list;

3
net/batman-adv/soft-interface.c
View File

@ -1020,9 +1020,10 @@ static void batadv_softif_init_early(struct net_device *dev)
dev->netdev_ops = &batadv_netdev_ops;
dev->needs_free_netdev = true;
dev->priv_destructor = batadv_softif_free;
dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL;
dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
dev->priv_flags |= IFF_NO_QUEUE;
dev->lltx = true;
dev->netns_local = true;
/* can't call min_mtu, because the needed variables
* have not been initialized yet

5
net/bridge/br_device.c
View File

@ -488,9 +488,10 @@ void br_dev_setup(struct net_device *dev)
SET_NETDEV_DEVTYPE(dev, &br_type);
dev->priv_flags = IFF_EBRIDGE | IFF_NO_QUEUE;
dev->lltx = true;
dev->netns_local = true;
dev->features = COMMON_FEATURES | NETIF_F_NETNS_LOCAL |
NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
dev->features = COMMON_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_TX;
dev->hw_features = COMMON_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_TX;
dev->vlan_features = COMMON_FEATURES;

4
net/core/dev.c
View File

@ -11487,7 +11487,7 @@ int __dev_change_net_namespace(struct net_device *dev, struct net *net,
/* Don't allow namespace local devices to be moved. */
err = -EINVAL;
if (dev->features & NETIF_F_NETNS_LOCAL)
if (dev->netns_local)
goto out;
/* Ensure the device has been registered */
@ -11869,7 +11869,7 @@ static void __net_exit default_device_exit_net(struct net *net)
char fb_name[IFNAMSIZ];
/* Ignore unmoveable devices (i.e. loopback) */
if (dev->features & NETIF_F_NETNS_LOCAL)
if (dev->netns_local)
continue;
/* Leave virtual devices for the generic cleanup */

1
net/ethtool/common.c
View File

@ -25,7 +25,6 @@ const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
[NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
[NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
[NETIF_F_GSO_BIT] = "tx-generic-segmentation",
[NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
[NETIF_F_GRO_BIT] = "rx-gro",
[NETIF_F_GRO_HW_BIT] = "rx-gro-hw",
[NETIF_F_LRO_BIT] = "rx-lro",

8
net/hsr/hsr_device.c
View File

@ -556,6 +556,10 @@ void hsr_dev_setup(struct net_device *dev)
dev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL;
/* Prevent recursive tx locking */
dev->lltx = true;
/* Not sure about this. Taken from bridge code. netdevice.h says
* it means "Does not change network namespaces".
*/
dev->netns_local = true;
dev->needs_free_netdev = true;
@ -569,10 +573,6 @@ void hsr_dev_setup(struct net_device *dev)
* hsr_header_create() etc.
*/
dev->features |= NETIF_F_VLAN_CHALLENGED;
/* Not sure about this. Taken from bridge code. netdev_features.h says
* it means "Does not change network namespaces".
*/
dev->features |= NETIF_F_NETNS_LOCAL;
}
/* Return true if dev is a HSR master; return false otherwise.

2
net/ieee802154/6lowpan/core.c
View File

@ -116,7 +116,7 @@ static void lowpan_setup(struct net_device *ldev)
ldev->netdev_ops = &lowpan_netdev_ops;
ldev->header_ops = &lowpan_header_ops;
ldev->needs_free_netdev = true;
ldev->features |= NETIF_F_NETNS_LOCAL;
ldev->netns_local = true;
}
static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[],

10
net/ieee802154/core.c
View File

@ -226,11 +226,11 @@ int cfg802154_switch_netns(struct cfg802154_registered_device *rdev,
list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
if (!wpan_dev->netdev)
continue;
wpan_dev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
wpan_dev->netdev->netns_local = false;
err = dev_change_net_namespace(wpan_dev->netdev, net, "wpan%d");
if (err)
break;
wpan_dev->netdev->features |= NETIF_F_NETNS_LOCAL;
wpan_dev->netdev->netns_local = true;
}
if (err) {
@ -242,11 +242,11 @@ int cfg802154_switch_netns(struct cfg802154_registered_device *rdev,
list) {
if (!wpan_dev->netdev)
continue;
wpan_dev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
wpan_dev->netdev->netns_local = false;
err = dev_change_net_namespace(wpan_dev->netdev, net,
"wpan%d");
WARN_ON(err);
wpan_dev->netdev->features |= NETIF_F_NETNS_LOCAL;
wpan_dev->netdev->netns_local = true;
}
return err;
@ -291,7 +291,7 @@ static int cfg802154_netdev_notifier_call(struct notifier_block *nb,
switch (state) {
/* TODO NETDEV_DEVTYPE */
case NETDEV_REGISTER:
dev->features |= NETIF_F_NETNS_LOCAL;
dev->netns_local = true;
wpan_dev->identifier = ++rdev->wpan_dev_id;
list_add_rcu(&wpan_dev->list, &rdev->wpan_dev_list);
rdev->devlist_generation++;

2
net/ipv4/ip_tunnel.c
View File

@ -1161,7 +1161,7 @@ int ip_tunnel_init_net(struct net *net, unsigned int ip_tnl_net_id,
* Allowing to move it to another netns is clearly unsafe.
*/
if (!IS_ERR(itn->fb_tunnel_dev)) {
itn->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL;
itn->fb_tunnel_dev->netns_local = true;
itn->fb_tunnel_dev->mtu = ip_tunnel_bind_dev(itn->fb_tunnel_dev);
ip_tunnel_add(itn, netdev_priv(itn->fb_tunnel_dev));
itn->type = itn->fb_tunnel_dev->type;

2
net/ipv4/ipmr.c
View File

@ -537,7 +537,7 @@ static void reg_vif_setup(struct net_device *dev)
dev->flags = IFF_NOARP;
dev->netdev_ops = &reg_vif_netdev_ops;
dev->needs_free_netdev = true;
dev->features |= NETIF_F_NETNS_LOCAL;
dev->netns_local = true;
}
static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt)

3
net/ipv6/ip6_gre.c
View File

@ -1621,8 +1621,7 @@ static int __net_init ip6gre_init_net(struct net *net)
/* FB netdevice is special: we have one, and only one per netns.
* Allowing to move it to another netns is clearly unsafe.
*/
ign->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL;
ign->fb_tunnel_dev->netns_local = true;
ip6gre_fb_tunnel_init(ign->fb_tunnel_dev);
ign->fb_tunnel_dev->rtnl_link_ops = &ip6gre_link_ops;

2
net/ipv6/ip6_tunnel.c
View File

@ -2258,7 +2258,7 @@ static int __net_init ip6_tnl_init_net(struct net *net)
/* FB netdevice is special: we have one, and only one per netns.
* Allowing to move it to another netns is clearly unsafe.
*/
ip6n->fb_tnl_dev->features |= NETIF_F_NETNS_LOCAL;
ip6n->fb_tnl_dev->netns_local = true;
err = ip6_fb_tnl_dev_init(ip6n->fb_tnl_dev);
if (err < 0)

2
net/ipv6/ip6mr.c
View File

@ -640,7 +640,7 @@ static void reg_vif_setup(struct net_device *dev)
dev->flags = IFF_NOARP;
dev->netdev_ops = &reg_vif_netdev_ops;
dev->needs_free_netdev = true;
dev->features |= NETIF_F_NETNS_LOCAL;
dev->netns_local = true;
}
static struct net_device *ip6mr_reg_vif(struct net *net, struct mr_table *mrt)

2
net/ipv6/sit.c
View File

@ -1856,7 +1856,7 @@ static int __net_init sit_init_net(struct net *net)
/* FB netdevice is special: we have one, and only one per netns.
* Allowing to move it to another netns is clearly unsafe.
*/
sitn->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL;
sitn->fb_tunnel_dev->netns_local = true;
err = register_netdev(sitn->fb_tunnel_dev);
if (err)

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

@ -149,7 +149,7 @@ static struct vport *internal_dev_create(const struct vport_parms *parms)
/* Restrict bridge port to current netns. */
if (vport->port_no == OVSP_LOCAL)
vport->dev->features |= NETIF_F_NETNS_LOCAL;
vport->dev->netns_local = true;
rtnl_lock();
err = register_netdevice(vport->dev);

10
net/wireless/core.c
View File

@ -165,11 +165,11 @@ int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
if (!wdev->netdev)
continue;
wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
wdev->netdev->netns_local = false;
err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
if (err)
break;
wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
wdev->netdev->netns_local = true;
}
if (err) {
@ -181,11 +181,11 @@ int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
list) {
if (!wdev->netdev)
continue;
wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
wdev->netdev->netns_local = false;
err = dev_change_net_namespace(wdev->netdev, net,
"wlan%d");
WARN_ON(err);
wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
wdev->netdev->netns_local = true;
}
return err;
@ -1473,7 +1473,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
SET_NETDEV_DEVTYPE(dev, &wiphy_type);
wdev->netdev = dev;
/* can only change netns with wiphy */
dev->features |= NETIF_F_NETNS_LOCAL;
dev->netns_local = true;
cfg80211_init_wdev(wdev);
break;

2
tools/testing/selftests/net/forwarding/README
View File

@ -6,7 +6,7 @@ to easily create and test complex environments.
Unfortunately, these namespaces can not be used with actual switching
ASICs, as their ports can not be migrated to other network namespaces
(NETIF_F_NETNS_LOCAL) and most of them probably do not support the
(dev->netns_local) and most of them probably do not support the
L1-separation provided by namespaces.
However, a similar kind of flexibility can be achieved by using VRFs and