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Diffstat (limited to 'net/8021q/vlan.c')
-rw-r--r--net/8021q/vlan.c238
1 files changed, 163 insertions, 75 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 2fb2d88e8c2e..2b74ed56eb16 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* INET 802.1Q VLAN
* Ethernet-type device handling.
@@ -11,11 +12,6 @@
* Add HW acceleration hooks - David S. Miller <davem@redhat.com>;
* Correct all the locking - David S. Miller <davem@redhat.com>;
* Use hash table for VLAN groups - David S. Miller <davem@redhat.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -27,14 +23,13 @@
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/rculist.h>
-#include <net/p8022.h>
#include <net/arp.h>
#include <linux/rtnetlink.h>
#include <linux/notifier.h>
#include <net/rtnetlink.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <linux/if_vlan.h>
#include "vlan.h"
@@ -44,7 +39,7 @@
/* Global VLAN variables */
-int vlan_net_id __read_mostly;
+unsigned int vlan_net_id __read_mostly;
const char vlan_fullname[] = "802.1Q VLAN Support";
const char vlan_version[] = DRV_VERSION;
@@ -55,26 +50,41 @@ static int vlan_group_prealloc_vid(struct vlan_group *vg,
__be16 vlan_proto, u16 vlan_id)
{
struct net_device **array;
- unsigned int pidx, vidx;
+ unsigned int vidx;
unsigned int size;
+ int pidx;
ASSERT_RTNL();
pidx = vlan_proto_idx(vlan_proto);
+ if (pidx < 0)
+ return -EINVAL;
+
vidx = vlan_id / VLAN_GROUP_ARRAY_PART_LEN;
array = vg->vlan_devices_arrays[pidx][vidx];
if (array != NULL)
return 0;
size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
- array = kzalloc(size, GFP_KERNEL);
+ array = kzalloc(size, GFP_KERNEL_ACCOUNT);
if (array == NULL)
return -ENOBUFS;
+ /* paired with smp_rmb() in __vlan_group_get_device() */
+ smp_wmb();
+
vg->vlan_devices_arrays[pidx][vidx] = array;
return 0;
}
+static void vlan_stacked_transfer_operstate(const struct net_device *rootdev,
+ struct net_device *dev,
+ struct vlan_dev_priv *vlan)
+{
+ if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING))
+ netif_stacked_transfer_operstate(rootdev, dev);
+}
+
void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
{
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
@@ -98,47 +108,44 @@ void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
vlan_gvrp_request_leave(dev);
vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL);
+
+ netdev_upper_dev_unlink(real_dev, dev);
/* Because unregister_netdevice_queue() makes sure at least one rcu
* grace period is respected before device freeing,
* we dont need to call synchronize_net() here.
*/
unregister_netdevice_queue(dev, head);
- netdev_upper_dev_unlink(real_dev, dev);
-
if (grp->nr_vlan_devs == 0) {
vlan_mvrp_uninit_applicant(real_dev);
vlan_gvrp_uninit_applicant(real_dev);
}
- /* Take it out of our own structures, but be sure to interlock with
- * HW accelerating devices or SW vlan input packet processing if
- * VLAN is not 0 (leave it there for 802.1p).
- */
- if (vlan_id)
- vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
-
- /* Get rid of the vlan's reference to real_dev */
- dev_put(real_dev);
+ vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
}
int vlan_check_real_dev(struct net_device *real_dev,
- __be16 protocol, u16 vlan_id)
+ __be16 protocol, u16 vlan_id,
+ struct netlink_ext_ack *extack)
{
const char *name = real_dev->name;
- if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
+ if (real_dev->features & NETIF_F_VLAN_CHALLENGED ||
+ real_dev->type != ARPHRD_ETHER) {
pr_info("VLANs not supported on %s\n", name);
+ NL_SET_ERR_MSG_MOD(extack, "VLANs not supported on device");
return -EOPNOTSUPP;
}
- if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL)
+ if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL) {
+ NL_SET_ERR_MSG_MOD(extack, "VLAN device already exists");
return -EEXIST;
+ }
return 0;
}
-int register_vlan_dev(struct net_device *dev)
+int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack)
{
struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
struct net_device *real_dev = vlan->real_dev;
@@ -169,18 +176,15 @@ int register_vlan_dev(struct net_device *dev)
if (err < 0)
goto out_uninit_mvrp;
- err = netdev_upper_dev_link(real_dev, dev);
- if (err)
- goto out_uninit_mvrp;
-
err = register_netdevice(dev);
if (err < 0)
- goto out_upper_dev_unlink;
+ goto out_uninit_mvrp;
- /* Account for reference in struct vlan_dev_priv */
- dev_hold(real_dev);
+ err = netdev_upper_dev_link(real_dev, dev, extack);
+ if (err)
+ goto out_unregister_netdev;
- netif_stacked_transfer_operstate(real_dev, dev);
+ vlan_stacked_transfer_operstate(real_dev, dev, vlan);
linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */
/* So, got the sucker initialized, now lets place
@@ -189,10 +193,12 @@ int register_vlan_dev(struct net_device *dev)
vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev);
grp->nr_vlan_devs++;
+ netdev_update_features(dev);
+
return 0;
-out_upper_dev_unlink:
- netdev_upper_dev_unlink(real_dev, dev);
+out_unregister_netdev:
+ unregister_netdevice(dev);
out_uninit_mvrp:
if (grp->nr_vlan_devs == 0)
vlan_mvrp_uninit_applicant(real_dev);
@@ -210,6 +216,7 @@ out_vid_del:
static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
{
struct net_device *new_dev;
+ struct vlan_dev_priv *vlan;
struct net *net = dev_net(real_dev);
struct vlan_net *vn = net_generic(net, vlan_net_id);
char name[IFNAMSIZ];
@@ -218,7 +225,8 @@ static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
if (vlan_id >= VLAN_VID_MASK)
return -ERANGE;
- err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id);
+ err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id,
+ NULL);
if (err < 0)
return err;
@@ -248,7 +256,8 @@ static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
}
- new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name, vlan_setup);
+ new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
+ NET_NAME_UNKNOWN, vlan_setup);
if (new_dev == NULL)
return -ENOBUFS;
@@ -258,16 +267,16 @@ static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
* hope the underlying device can handle it.
*/
new_dev->mtu = real_dev->mtu;
- new_dev->priv_flags |= (real_dev->priv_flags & IFF_UNICAST_FLT);
- vlan_dev_priv(new_dev)->vlan_proto = htons(ETH_P_8021Q);
- vlan_dev_priv(new_dev)->vlan_id = vlan_id;
- vlan_dev_priv(new_dev)->real_dev = real_dev;
- vlan_dev_priv(new_dev)->dent = NULL;
- vlan_dev_priv(new_dev)->flags = VLAN_FLAG_REORDER_HDR;
+ vlan = vlan_dev_priv(new_dev);
+ vlan->vlan_proto = htons(ETH_P_8021Q);
+ vlan->vlan_id = vlan_id;
+ vlan->real_dev = real_dev;
+ vlan->dent = NULL;
+ vlan->flags = VLAN_FLAG_REORDER_HDR;
new_dev->rtnl_link_ops = &vlan_link_ops;
- err = register_vlan_dev(new_dev);
+ err = register_vlan_dev(new_dev, NULL);
if (err < 0)
goto out_free_newdev;
@@ -287,6 +296,10 @@ static void vlan_sync_address(struct net_device *dev,
if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
return;
+ /* vlan continues to inherit address of lower device */
+ if (vlan_dev_inherit_address(vlandev, dev))
+ goto out;
+
/* vlan address was different from the old address and is equal to
* the new address */
if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
@@ -299,15 +312,18 @@ static void vlan_sync_address(struct net_device *dev,
!ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
dev_uc_add(dev, vlandev->dev_addr);
- memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
+out:
+ ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
}
static void vlan_transfer_features(struct net_device *dev,
struct net_device *vlandev)
{
- vlandev->gso_max_size = dev->gso_max_size;
+ struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
- if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
+ netif_inherit_tso_max(vlandev, dev);
+
+ if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
vlandev->hard_header_len = dev->hard_header_len;
else
vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
@@ -316,31 +332,66 @@ static void vlan_transfer_features(struct net_device *dev,
vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid;
#endif
+ vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
+ vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE);
+ vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev);
+
netdev_update_features(vlandev);
}
-static void __vlan_device_event(struct net_device *dev, unsigned long event)
+static int __vlan_device_event(struct net_device *dev, unsigned long event)
{
+ int err = 0;
+
switch (event) {
case NETDEV_CHANGENAME:
vlan_proc_rem_dev(dev);
- if (vlan_proc_add_dev(dev) < 0)
- pr_warn("failed to change proc name for %s\n",
- dev->name);
+ err = vlan_proc_add_dev(dev);
break;
case NETDEV_REGISTER:
- if (vlan_proc_add_dev(dev) < 0)
- pr_warn("failed to add proc entry for %s\n", dev->name);
+ err = vlan_proc_add_dev(dev);
break;
case NETDEV_UNREGISTER:
vlan_proc_rem_dev(dev);
break;
}
+
+ return err;
+}
+
+static void vlan_vid0_add(struct net_device *dev)
+{
+ struct vlan_info *vlan_info;
+ int err;
+
+ if (!(dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
+ return;
+
+ pr_info("adding VLAN 0 to HW filter on device %s\n", dev->name);
+
+ err = vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
+ if (err)
+ return;
+
+ vlan_info = rtnl_dereference(dev->vlan_info);
+ vlan_info->auto_vid0 = true;
+}
+
+static void vlan_vid0_del(struct net_device *dev)
+{
+ struct vlan_info *vlan_info = rtnl_dereference(dev->vlan_info);
+
+ if (!vlan_info || !vlan_info->auto_vid0)
+ return;
+
+ vlan_info->auto_vid0 = false;
+ vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
}
static int vlan_device_event(struct notifier_block *unused, unsigned long event,
void *ptr)
{
+ struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct vlan_group *grp;
struct vlan_info *vlan_info;
@@ -349,17 +400,20 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
struct vlan_dev_priv *vlan;
bool last = false;
LIST_HEAD(list);
+ int err;
- if (is_vlan_dev(dev))
- __vlan_device_event(dev, event);
+ if (is_vlan_dev(dev)) {
+ int err = __vlan_device_event(dev, event);
- if ((event == NETDEV_UP) &&
- (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
- pr_info("adding VLAN 0 to HW filter on device %s\n",
- dev->name);
- vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
+ if (err)
+ return notifier_from_errno(err);
}
+ if (event == NETDEV_UP)
+ vlan_vid0_add(dev);
+ else if (event == NETDEV_DOWN)
+ vlan_vid0_del(dev);
+
vlan_info = rtnl_dereference(dev->vlan_info);
if (!vlan_info)
goto out;
@@ -373,7 +427,8 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
case NETDEV_CHANGE:
/* Propagate real device state to vlan devices */
vlan_group_for_each_dev(grp, i, vlandev)
- netif_stacked_transfer_operstate(dev, vlandev);
+ vlan_stacked_transfer_operstate(dev, vlandev,
+ vlan_dev_priv(vlandev));
break;
case NETDEV_CHANGEADDR:
@@ -402,9 +457,9 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
vlan_transfer_features(dev, vlandev);
break;
- case NETDEV_DOWN:
- if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
- vlan_vid_del(dev, htons(ETH_P_8021Q), 0);
+ case NETDEV_DOWN: {
+ struct net_device *tmp;
+ LIST_HEAD(close_list);
/* Put all VLANs for this dev in the down state too. */
vlan_group_for_each_dev(grp, i, vlandev) {
@@ -414,22 +469,31 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
vlan = vlan_dev_priv(vlandev);
if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
- dev_change_flags(vlandev, flgs & ~IFF_UP);
- netif_stacked_transfer_operstate(dev, vlandev);
+ list_add(&vlandev->close_list, &close_list);
}
- break;
+ netif_close_many(&close_list, false);
+
+ list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
+ vlan_stacked_transfer_operstate(dev, vlandev,
+ vlan_dev_priv(vlandev));
+ list_del_init(&vlandev->close_list);
+ }
+ list_del(&close_list);
+ break;
+ }
case NETDEV_UP:
/* Put all VLANs for this dev in the up state too. */
vlan_group_for_each_dev(grp, i, vlandev) {
- flgs = vlandev->flags;
+ flgs = netif_get_flags(vlandev);
if (flgs & IFF_UP)
continue;
vlan = vlan_dev_priv(vlandev);
if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
- dev_change_flags(vlandev, flgs | IFF_UP);
- netif_stacked_transfer_operstate(dev, vlandev);
+ dev_change_flags(vlandev, flgs | IFF_UP,
+ extack);
+ vlan_stacked_transfer_operstate(dev, vlandev, vlan);
}
break;
@@ -459,10 +523,31 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
case NETDEV_NOTIFY_PEERS:
case NETDEV_BONDING_FAILOVER:
+ case NETDEV_RESEND_IGMP:
/* Propagate to vlan devices */
vlan_group_for_each_dev(grp, i, vlandev)
call_netdevice_notifiers(event, vlandev);
break;
+
+ case NETDEV_CVLAN_FILTER_PUSH_INFO:
+ err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021Q));
+ if (err)
+ return notifier_from_errno(err);
+ break;
+
+ case NETDEV_CVLAN_FILTER_DROP_INFO:
+ vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021Q));
+ break;
+
+ case NETDEV_SVLAN_FILTER_PUSH_INFO:
+ err = vlan_filter_push_vids(vlan_info, htons(ETH_P_8021AD));
+ if (err)
+ return notifier_from_errno(err);
+ break;
+
+ case NETDEV_SVLAN_FILTER_DROP_INFO:
+ vlan_filter_drop_vids(vlan_info, htons(ETH_P_8021AD));
+ break;
}
out:
@@ -488,8 +573,8 @@ static int vlan_ioctl_handler(struct net *net, void __user *arg)
return -EFAULT;
/* Null terminate this sucker, just in case. */
- args.device1[23] = 0;
- args.u.device2[23] = 0;
+ args.device1[sizeof(args.device1) - 1] = 0;
+ args.u.device2[sizeof(args.u.device2) - 1] = 0;
rtnl_lock();
@@ -544,8 +629,7 @@ static int vlan_ioctl_handler(struct net *net, void __user *arg)
err = -EPERM;
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
break;
- if ((args.u.name_type >= 0) &&
- (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
+ if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) {
struct vlan_net *vn;
vn = net_generic(net, vlan_net_id);
@@ -573,7 +657,8 @@ static int vlan_ioctl_handler(struct net *net, void __user *arg)
case GET_VLAN_REALDEV_NAME_CMD:
err = 0;
- vlan_dev_get_realdev_name(dev, args.u.device2);
+ vlan_dev_get_realdev_name(dev, args.u.device2,
+ sizeof(args.u.device2));
if (copy_to_user(arg, &args,
sizeof(struct vlan_ioctl_args)))
err = -EFAULT;
@@ -664,6 +749,7 @@ err0:
static void __exit vlan_cleanup_module(void)
{
vlan_ioctl_set(NULL);
+
vlan_netlink_fini();
unregister_netdevice_notifier(&vlan_notifier_block);
@@ -678,5 +764,7 @@ static void __exit vlan_cleanup_module(void)
module_init(vlan_proto_init);
module_exit(vlan_cleanup_module);
+MODULE_DESCRIPTION("802.1Q/802.1ad VLAN Protocol");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
+MODULE_IMPORT_NS("NETDEV_INTERNAL");
generated by cgit (git 2.34.1) at 2025-12-25 07:56:33 +0000