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-rw-r--r--net/8021q/vlan.c153
-rw-r--r--net/8021q/vlan.h13
-rw-r--r--net/8021q/vlan_dev.c142
3 files changed, 109 insertions, 199 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index de78c9dd713b..3678f0719934 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -278,43 +278,16 @@ static int unregister_vlan_dev(struct net_device *real_dev,
return ret;
}
-static int unregister_vlan_device(const char *vlan_IF_name)
+static int unregister_vlan_device(struct net_device *dev)
{
- struct net_device *dev = NULL;
int ret;
+ ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
+ VLAN_DEV_INFO(dev)->vlan_id);
+ unregister_netdevice(dev);
- dev = dev_get_by_name(vlan_IF_name);
- ret = -EINVAL;
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- rtnl_lock();
-
- ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev,
- VLAN_DEV_INFO(dev)->vlan_id);
-
- dev_put(dev);
- unregister_netdevice(dev);
-
- rtnl_unlock();
-
- if (ret == 1)
- ret = 0;
- } else {
- printk(VLAN_ERR
- "%s: ERROR: Tried to remove a non-vlan device "
- "with VLAN code, name: %s priv_flags: %hX\n",
- __FUNCTION__, dev->name, dev->priv_flags);
- dev_put(dev);
- ret = -EPERM;
- }
- } else {
-#ifdef VLAN_DEBUG
- printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__);
-#endif
- ret = -EINVAL;
- }
-
+ if (ret == 1)
+ ret = 0;
return ret;
}
@@ -378,12 +351,11 @@ static struct lock_class_key vlan_netdev_xmit_lock_key;
* Returns the device that was created, or NULL if there was
* an error of some kind.
*/
-static struct net_device *register_vlan_device(const char *eth_IF_name,
+static struct net_device *register_vlan_device(struct net_device *real_dev,
unsigned short VLAN_ID)
{
struct vlan_group *grp;
struct net_device *new_dev;
- struct net_device *real_dev; /* the ethernet device */
char name[IFNAMSIZ];
int i;
@@ -395,46 +367,36 @@ static struct net_device *register_vlan_device(const char *eth_IF_name,
if (VLAN_ID >= VLAN_VID_MASK)
goto out_ret_null;
- /* find the device relating to eth_IF_name. */
- real_dev = dev_get_by_name(eth_IF_name);
- if (!real_dev)
- goto out_ret_null;
-
if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
printk(VLAN_DBG "%s: VLANs not supported on %s.\n",
__FUNCTION__, real_dev->name);
- goto out_put_dev;
+ goto out_ret_null;
}
if ((real_dev->features & NETIF_F_HW_VLAN_RX) &&
!real_dev->vlan_rx_register) {
printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
__FUNCTION__, real_dev->name);
- goto out_put_dev;
+ goto out_ret_null;
}
if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
(!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) {
printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
__FUNCTION__, real_dev->name);
- goto out_put_dev;
+ goto out_ret_null;
}
- /* From this point on, all the data structures must remain
- * consistent.
- */
- rtnl_lock();
-
/* The real device must be up and operating in order to
* assosciate a VLAN device with it.
*/
if (!(real_dev->flags & IFF_UP))
- goto out_unlock;
+ goto out_ret_null;
if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) {
/* was already registered. */
printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__);
- goto out_unlock;
+ goto out_ret_null;
}
/* Gotta set up the fields for the device. */
@@ -471,7 +433,7 @@ static struct net_device *register_vlan_device(const char *eth_IF_name,
vlan_setup);
if (new_dev == NULL)
- goto out_unlock;
+ goto out_ret_null;
#ifdef VLAN_DEBUG
printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name);
@@ -577,9 +539,8 @@ static struct net_device *register_vlan_device(const char *eth_IF_name,
if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
real_dev->vlan_rx_add_vid(real_dev, VLAN_ID);
- rtnl_unlock();
-
-
+ /* Account for reference in struct vlan_dev_info */
+ dev_hold(real_dev);
#ifdef VLAN_DEBUG
printk(VLAN_DBG "Allocated new device successfully, returning.\n");
#endif
@@ -590,17 +551,11 @@ out_free_arrays:
out_free_unregister:
unregister_netdev(new_dev);
- goto out_unlock;
+ goto out_ret_null;
out_free_newdev:
free_netdev(new_dev);
-out_unlock:
- rtnl_unlock();
-
-out_put_dev:
- dev_put(real_dev);
-
out_ret_null:
return NULL;
}
@@ -693,9 +648,10 @@ out:
*/
static int vlan_ioctl_handler(void __user *arg)
{
- int err = 0;
+ int err;
unsigned short vid = 0;
struct vlan_ioctl_args args;
+ struct net_device *dev = NULL;
if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
return -EFAULT;
@@ -708,35 +664,61 @@ static int vlan_ioctl_handler(void __user *arg)
printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd);
#endif
+ rtnl_lock();
+
switch (args.cmd) {
case SET_VLAN_INGRESS_PRIORITY_CMD:
+ case SET_VLAN_EGRESS_PRIORITY_CMD:
+ case SET_VLAN_FLAG_CMD:
+ case ADD_VLAN_CMD:
+ case DEL_VLAN_CMD:
+ case GET_VLAN_REALDEV_NAME_CMD:
+ case GET_VLAN_VID_CMD:
+ err = -ENODEV;
+ dev = __dev_get_by_name(args.device1);
+ if (!dev)
+ goto out;
+
+ err = -EINVAL;
+ if (args.cmd != ADD_VLAN_CMD &&
+ !(dev->priv_flags & IFF_802_1Q_VLAN))
+ goto out;
+ }
+
+ switch (args.cmd) {
+ case SET_VLAN_INGRESS_PRIORITY_CMD:
+ err = -EPERM;
if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- err = vlan_dev_set_ingress_priority(args.device1,
- args.u.skb_priority,
- args.vlan_qos);
+ break;
+ vlan_dev_set_ingress_priority(dev,
+ args.u.skb_priority,
+ args.vlan_qos);
break;
case SET_VLAN_EGRESS_PRIORITY_CMD:
+ err = -EPERM;
if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- err = vlan_dev_set_egress_priority(args.device1,
+ break;
+ err = vlan_dev_set_egress_priority(dev,
args.u.skb_priority,
args.vlan_qos);
break;
case SET_VLAN_FLAG_CMD:
+ err = -EPERM;
if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- err = vlan_dev_set_vlan_flag(args.device1,
+ break;
+ err = vlan_dev_set_vlan_flag(dev,
args.u.flag,
args.vlan_qos);
break;
case SET_VLAN_NAME_TYPE_CMD:
+ err = -EPERM;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
- if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) {
+ if ((args.u.name_type >= 0) &&
+ (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
vlan_name_type = args.u.name_type;
err = 0;
} else {
@@ -745,13 +727,10 @@ static int vlan_ioctl_handler(void __user *arg)
break;
case ADD_VLAN_CMD:
+ err = -EPERM;
if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- /* we have been given the name of the Ethernet Device we want to
- * talk to: args.dev1 We also have the
- * VLAN ID: args.u.VID
- */
- if (register_vlan_device(args.device1, args.u.VID)) {
+ break;
+ if (register_vlan_device(dev, args.u.VID)) {
err = 0;
} else {
err = -EINVAL;
@@ -759,12 +738,10 @@ static int vlan_ioctl_handler(void __user *arg)
break;
case DEL_VLAN_CMD:
+ err = -EPERM;
if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- /* Here, the args.dev1 is the actual VLAN we want
- * to get rid of.
- */
- err = unregister_vlan_device(args.device1);
+ break;
+ err = unregister_vlan_device(dev);
break;
case GET_VLAN_INGRESS_PRIORITY_CMD:
@@ -788,9 +765,7 @@ static int vlan_ioctl_handler(void __user *arg)
err = -EINVAL;
break;
case GET_VLAN_REALDEV_NAME_CMD:
- err = vlan_dev_get_realdev_name(args.device1, args.u.device2);
- if (err)
- goto out;
+ vlan_dev_get_realdev_name(dev, args.u.device2);
if (copy_to_user(arg, &args,
sizeof(struct vlan_ioctl_args))) {
err = -EFAULT;
@@ -798,9 +773,7 @@ static int vlan_ioctl_handler(void __user *arg)
break;
case GET_VLAN_VID_CMD:
- err = vlan_dev_get_vid(args.device1, &vid);
- if (err)
- goto out;
+ vlan_dev_get_vid(dev, &vid);
args.u.VID = vid;
if (copy_to_user(arg, &args,
sizeof(struct vlan_ioctl_args))) {
@@ -812,9 +785,11 @@ static int vlan_ioctl_handler(void __user *arg)
/* pass on to underlying device instead?? */
printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n",
__FUNCTION__, args.cmd);
- return -EINVAL;
+ err = -EINVAL;
+ break;
}
out:
+ rtnl_unlock();
return err;
}
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 1976cdba8f72..b83739017e9d 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -62,11 +62,14 @@ int vlan_dev_set_mac_address(struct net_device *dev, void* addr);
int vlan_dev_open(struct net_device* dev);
int vlan_dev_stop(struct net_device* dev);
int vlan_dev_ioctl(struct net_device* dev, struct ifreq *ifr, int cmd);
-int vlan_dev_set_ingress_priority(char* dev_name, __u32 skb_prio, short vlan_prio);
-int vlan_dev_set_egress_priority(char* dev_name, __u32 skb_prio, short vlan_prio);
-int vlan_dev_set_vlan_flag(char* dev_name, __u32 flag, short flag_val);
-int vlan_dev_get_realdev_name(const char* dev_name, char* result);
-int vlan_dev_get_vid(const char* dev_name, unsigned short* result);
+void vlan_dev_set_ingress_priority(const struct net_device *dev,
+ u32 skb_prio, short vlan_prio);
+int vlan_dev_set_egress_priority(const struct net_device *dev,
+ u32 skb_prio, short vlan_prio);
+int vlan_dev_set_vlan_flag(const struct net_device *dev,
+ u32 flag, short flag_val);
+void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
+void vlan_dev_get_vid(const struct net_device *dev, unsigned short *result);
void vlan_dev_set_multicast_list(struct net_device *vlan_dev);
#endif /* !(__BEN_VLAN_802_1Q_INC__) */
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index ec46084f44b4..05a23601f670 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -534,136 +534,68 @@ int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
-int vlan_dev_set_ingress_priority(char *dev_name, __u32 skb_prio, short vlan_prio)
+void vlan_dev_set_ingress_priority(const struct net_device *dev,
+ u32 skb_prio, short vlan_prio)
{
- struct net_device *dev = dev_get_by_name(dev_name);
-
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- /* see if a priority mapping exists.. */
- VLAN_DEV_INFO(dev)->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
- dev_put(dev);
- return 0;
- }
-
- dev_put(dev);
- }
- return -EINVAL;
+ VLAN_DEV_INFO(dev)->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
}
-int vlan_dev_set_egress_priority(char *dev_name, __u32 skb_prio, short vlan_prio)
+int vlan_dev_set_egress_priority(const struct net_device *dev,
+ u32 skb_prio, short vlan_prio)
{
- struct net_device *dev = dev_get_by_name(dev_name);
struct vlan_priority_tci_mapping *mp = NULL;
struct vlan_priority_tci_mapping *np;
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- /* See if a priority mapping exists.. */
- mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF];
- while (mp) {
- if (mp->priority == skb_prio) {
- mp->vlan_qos = ((vlan_prio << 13) & 0xE000);
- dev_put(dev);
- return 0;
- }
- mp = mp->next;
- }
-
- /* Create a new mapping then. */
- mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF];
- np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
- if (np) {
- np->next = mp;
- np->priority = skb_prio;
- np->vlan_qos = ((vlan_prio << 13) & 0xE000);
- VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF] = np;
- dev_put(dev);
- return 0;
- } else {
- dev_put(dev);
- return -ENOBUFS;
- }
+ /* See if a priority mapping exists.. */
+ mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF];
+ while (mp) {
+ if (mp->priority == skb_prio) {
+ mp->vlan_qos = ((vlan_prio << 13) & 0xE000);
+ return 0;
}
- dev_put(dev);
+ mp = mp->next;
}
- return -EINVAL;
+
+ /* Create a new mapping then. */
+ mp = VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF];
+ np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
+ if (!np)
+ return -ENOBUFS;
+
+ np->next = mp;
+ np->priority = skb_prio;
+ np->vlan_qos = ((vlan_prio << 13) & 0xE000);
+ VLAN_DEV_INFO(dev)->egress_priority_map[skb_prio & 0xF] = np;
+ return 0;
}
/* Flags are defined in the vlan_dev_info class in include/linux/if_vlan.h file. */
-int vlan_dev_set_vlan_flag(char *dev_name, __u32 flag, short flag_val)
+int vlan_dev_set_vlan_flag(const struct net_device *dev,
+ u32 flag, short flag_val)
{
- struct net_device *dev = dev_get_by_name(dev_name);
-
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- /* verify flag is supported */
- if (flag == 1) {
- if (flag_val) {
- VLAN_DEV_INFO(dev)->flags |= 1;
- } else {
- VLAN_DEV_INFO(dev)->flags &= ~1;
- }
- dev_put(dev);
- return 0;
- } else {
- printk(KERN_ERR "%s: flag %i is not valid.\n",
- __FUNCTION__, (int)(flag));
- dev_put(dev);
- return -EINVAL;
- }
+ /* verify flag is supported */
+ if (flag == 1) {
+ if (flag_val) {
+ VLAN_DEV_INFO(dev)->flags |= 1;
} else {
- printk(KERN_ERR
- "%s: %s is not a vlan device, priv_flags: %hX.\n",
- __FUNCTION__, dev->name, dev->priv_flags);
- dev_put(dev);
+ VLAN_DEV_INFO(dev)->flags &= ~1;
}
- } else {
- printk(KERN_ERR "%s: Could not find device: %s\n",
- __FUNCTION__, dev_name);
+ return 0;
}
-
+ printk(KERN_ERR "%s: flag %i is not valid.\n", __FUNCTION__, flag);
return -EINVAL;
}
-
-int vlan_dev_get_realdev_name(const char *dev_name, char* result)
+void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
{
- struct net_device *dev = dev_get_by_name(dev_name);
- int rv = 0;
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- strncpy(result, VLAN_DEV_INFO(dev)->real_dev->name, 23);
- rv = 0;
- } else {
- rv = -EINVAL;
- }
- dev_put(dev);
- } else {
- rv = -ENODEV;
- }
- return rv;
+ strncpy(result, VLAN_DEV_INFO(dev)->real_dev->name, 23);
}
-int vlan_dev_get_vid(const char *dev_name, unsigned short* result)
+void vlan_dev_get_vid(const struct net_device *dev, unsigned short *result)
{
- struct net_device *dev = dev_get_by_name(dev_name);
- int rv = 0;
- if (dev) {
- if (dev->priv_flags & IFF_802_1Q_VLAN) {
- *result = VLAN_DEV_INFO(dev)->vlan_id;
- rv = 0;
- } else {
- rv = -EINVAL;
- }
- dev_put(dev);
- } else {
- rv = -ENODEV;
- }
- return rv;
+ *result = VLAN_DEV_INFO(dev)->vlan_id;
}
-
int vlan_dev_set_mac_address(struct net_device *dev, void *addr_struct_p)
{
struct sockaddr *addr = (struct sockaddr *)(addr_struct_p);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.