diff options
Diffstat (limited to 'include/linux/if_vlan.h')
| -rw-r--r-- | include/linux/if_vlan.h | 238 |
1 files changed, 71 insertions, 167 deletions
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 15ace02b7b2..9e7b49b8062 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -14,10 +14,6 @@ #define _LINUX_IF_VLAN_H_ #ifdef __KERNEL__ - -/* externally defined structs */ -struct hlist_node; - #include <linux/netdevice.h> #include <linux/etherdevice.h> @@ -91,7 +87,7 @@ struct vlan_group { }; static inline struct net_device *vlan_group_get_device(struct vlan_group *vg, - unsigned int vlan_id) + u16 vlan_id) { struct net_device **array; array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; @@ -99,7 +95,7 @@ static inline struct net_device *vlan_group_get_device(struct vlan_group *vg, } static inline void vlan_group_set_device(struct vlan_group *vg, - unsigned int vlan_id, + u16 vlan_id, struct net_device *dev) { struct net_device **array; @@ -109,164 +105,81 @@ static inline void vlan_group_set_device(struct vlan_group *vg, array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev; } -struct vlan_priority_tci_mapping { - u32 priority; - unsigned short vlan_qos; /* This should be shifted when first set, so we only do it - * at provisioning time. - * ((skb->priority << 13) & 0xE000) - */ - struct vlan_priority_tci_mapping *next; -}; +#define vlan_tx_tag_present(__skb) ((__skb)->vlan_tci) +#define vlan_tx_tag_get(__skb) ((__skb)->vlan_tci) -/* Holds information that makes sense if this device is a VLAN device. */ -struct vlan_dev_info { - /** This will be the mapping that correlates skb->priority to - * 3 bits of VLAN QOS tags... - */ - unsigned int nr_ingress_mappings; - u32 ingress_priority_map[8]; - - unsigned int nr_egress_mappings; - struct vlan_priority_tci_mapping *egress_priority_map[16]; /* hash table */ - - unsigned short vlan_id; /* The VLAN Identifier for this interface. */ - unsigned short flags; /* (1 << 0) re_order_header This option will cause the - * VLAN code to move around the ethernet header on - * ingress to make the skb look **exactly** like it - * came in from an ethernet port. This destroys some of - * the VLAN information in the skb, but it fixes programs - * like DHCP that use packet-filtering and don't understand - * 802.1Q - */ - struct net_device *real_dev; /* the underlying device/interface */ - unsigned char real_dev_addr[ETH_ALEN]; - struct proc_dir_entry *dent; /* Holds the proc data */ - unsigned long cnt_inc_headroom_on_tx; /* How many times did we have to grow the skb on TX. */ - unsigned long cnt_encap_on_xmit; /* How many times did we have to encapsulate the skb on TX. */ -}; +#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) +extern struct net_device *vlan_dev_real_dev(const struct net_device *dev); +extern u16 vlan_dev_vlan_id(const struct net_device *dev); -static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev) +extern int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp, + u16 vlan_tci, int polling); +#else +static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev) { - return netdev_priv(dev); + BUG(); + return NULL; } -/* inline functions */ -static inline __u32 vlan_get_ingress_priority(struct net_device *dev, - unsigned short vlan_tag) +static inline u16 vlan_dev_vlan_id(const struct net_device *dev) { - struct vlan_dev_info *vip = vlan_dev_info(dev); - - return vip->ingress_priority_map[(vlan_tag >> 13) & 0x7]; + BUG(); + return 0; } -/* VLAN tx hw acceleration helpers. */ -struct vlan_skb_tx_cookie { - u32 magic; - u32 vlan_tag; -}; - -#define VLAN_TX_COOKIE_MAGIC 0x564c414e /* "VLAN" in ascii. */ -#define VLAN_TX_SKB_CB(__skb) ((struct vlan_skb_tx_cookie *)&((__skb)->cb[0])) -#define vlan_tx_tag_present(__skb) \ - (VLAN_TX_SKB_CB(__skb)->magic == VLAN_TX_COOKIE_MAGIC) -#define vlan_tx_tag_get(__skb) (VLAN_TX_SKB_CB(__skb)->vlan_tag) - -/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */ -static inline int __vlan_hwaccel_rx(struct sk_buff *skb, - struct vlan_group *grp, - unsigned short vlan_tag, int polling) +static inline int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp, + u16 vlan_tci, int polling) { - struct net_device_stats *stats; - - if (skb_bond_should_drop(skb)) { - dev_kfree_skb_any(skb); - return NET_RX_DROP; - } - - skb->dev = vlan_group_get_device(grp, vlan_tag & VLAN_VID_MASK); - if (skb->dev == NULL) { - dev_kfree_skb_any(skb); - - /* Not NET_RX_DROP, this is not being dropped - * due to congestion. - */ - return 0; - } - - skb->dev->last_rx = jiffies; - - stats = &skb->dev->stats; - stats->rx_packets++; - stats->rx_bytes += skb->len; - - skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tag); - switch (skb->pkt_type) { - case PACKET_BROADCAST: - break; - - case PACKET_MULTICAST: - stats->multicast++; - break; - - case PACKET_OTHERHOST: - /* Our lower layer thinks this is not local, let's make sure. - * This allows the VLAN to have a different MAC than the underlying - * device, and still route correctly. - */ - if (!compare_ether_addr(eth_hdr(skb)->h_dest, - skb->dev->dev_addr)) - skb->pkt_type = PACKET_HOST; - break; - }; - - return (polling ? netif_receive_skb(skb) : netif_rx(skb)); + BUG(); + return NET_XMIT_SUCCESS; } +#endif +/** + * vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration + * @skb: buffer + * @grp: vlan group + * @vlan_tci: VLAN TCI as received from the card + */ static inline int vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp, - unsigned short vlan_tag) + u16 vlan_tci) { - return __vlan_hwaccel_rx(skb, grp, vlan_tag, 0); + return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0); } +/** + * vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration + * @skb: buffer + * @grp: vlan group + * @vlan_tci: VLAN TCI as received from the card + */ static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb, struct vlan_group *grp, - unsigned short vlan_tag) + u16 vlan_tci) { - return __vlan_hwaccel_rx(skb, grp, vlan_tag, 1); + return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1); } /** * __vlan_put_tag - regular VLAN tag inserting * @skb: skbuff to tag - * @tag: VLAN tag to insert + * @vlan_tci: VLAN TCI to insert * * Inserts the VLAN tag into @skb as part of the payload * Returns a VLAN tagged skb. If a new skb is created, @skb is freed. - * + * * Following the skb_unshare() example, in case of error, the calling function * doesn't have to worry about freeing the original skb. */ -static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short tag) +static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, u16 vlan_tci) { struct vlan_ethhdr *veth; - if (skb_headroom(skb) < VLAN_HLEN) { - struct sk_buff *sk_tmp = skb; - skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN); - kfree_skb(sk_tmp); - if (!skb) { - printk(KERN_ERR "vlan: failed to realloc headroom\n"); - return NULL; - } - } else { - skb = skb_unshare(skb, GFP_ATOMIC); - if (!skb) { - printk(KERN_ERR "vlan: failed to unshare skbuff\n"); - return NULL; - } + if (skb_cow_head(skb, VLAN_HLEN) < 0) { + kfree_skb(skb); + return NULL; } - veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN); /* Move the mac addresses to the beginning of the new header. */ @@ -275,12 +188,10 @@ static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short /* first, the ethernet type */ veth->h_vlan_proto = htons(ETH_P_8021Q); - /* now, the tag */ - veth->h_vlan_TCI = htons(tag); + /* now, the TCI */ + veth->h_vlan_TCI = htons(vlan_tci); skb->protocol = htons(ETH_P_8021Q); - skb->mac_header -= VLAN_HLEN; - skb->network_header -= VLAN_HLEN; return skb; } @@ -288,18 +199,14 @@ static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, unsigned short /** * __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting * @skb: skbuff to tag - * @tag: VLAN tag to insert + * @vlan_tci: VLAN TCI to insert * - * Puts the VLAN tag in @skb->cb[] and lets the device do the rest + * Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest */ -static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb, unsigned short tag) +static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb, + u16 vlan_tci) { - struct vlan_skb_tx_cookie *cookie; - - cookie = VLAN_TX_SKB_CB(skb); - cookie->magic = VLAN_TX_COOKIE_MAGIC; - cookie->vlan_tag = tag; - + skb->vlan_tci = vlan_tci; return skb; } @@ -308,28 +215,28 @@ static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb, unsign /** * vlan_put_tag - inserts VLAN tag according to device features * @skb: skbuff to tag - * @tag: VLAN tag to insert + * @vlan_tci: VLAN TCI to insert * * Assumes skb->dev is the target that will xmit this frame. * Returns a VLAN tagged skb. */ -static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb, unsigned short tag) +static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb, u16 vlan_tci) { if (skb->dev->features & NETIF_F_HW_VLAN_TX) { - return __vlan_hwaccel_put_tag(skb, tag); + return __vlan_hwaccel_put_tag(skb, vlan_tci); } else { - return __vlan_put_tag(skb, tag); + return __vlan_put_tag(skb, vlan_tci); } } /** * __vlan_get_tag - get the VLAN ID that is part of the payload * @skb: skbuff to query - * @tag: buffer to store vlaue - * + * @vlan_tci: buffer to store vlaue + * * Returns error if the skb is not of VLAN type */ -static inline int __vlan_get_tag(const struct sk_buff *skb, unsigned short *tag) +static inline int __vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci) { struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb->data; @@ -337,29 +244,25 @@ static inline int __vlan_get_tag(const struct sk_buff *skb, unsigned short *tag) return -EINVAL; } - *tag = ntohs(veth->h_vlan_TCI); - + *vlan_tci = ntohs(veth->h_vlan_TCI); return 0; } /** * __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[] * @skb: skbuff to query - * @tag: buffer to store vlaue - * - * Returns error if @skb->cb[] is not set correctly + * @vlan_tci: buffer to store vlaue + * + * Returns error if @skb->vlan_tci is not set correctly */ static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb, - unsigned short *tag) + u16 *vlan_tci) { - struct vlan_skb_tx_cookie *cookie; - - cookie = VLAN_TX_SKB_CB(skb); - if (cookie->magic == VLAN_TX_COOKIE_MAGIC) { - *tag = cookie->vlan_tag; + if (vlan_tx_tag_present(skb)) { + *vlan_tci = skb->vlan_tci; return 0; } else { - *tag = 0; + *vlan_tci = 0; return -EINVAL; } } @@ -369,16 +272,16 @@ static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb, /** * vlan_get_tag - get the VLAN ID from the skb * @skb: skbuff to query - * @tag: buffer to store vlaue - * + * @vlan_tci: buffer to store vlaue + * * Returns error if the skb is not VLAN tagged */ -static inline int vlan_get_tag(const struct sk_buff *skb, unsigned short *tag) +static inline int vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci) { if (skb->dev->features & NETIF_F_HW_VLAN_TX) { - return __vlan_hwaccel_get_tag(skb, tag); + return __vlan_hwaccel_get_tag(skb, vlan_tci); } else { - return __vlan_get_tag(skb, tag); + return __vlan_get_tag(skb, vlan_tci); } } @@ -402,6 +305,7 @@ enum vlan_ioctl_cmds { enum vlan_flags { VLAN_FLAG_REORDER_HDR = 0x1, + VLAN_FLAG_GVRP = 0x2, }; enum vlan_name_types { |