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net: remove VLAN_TAG_PRESENT

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Replace VLAN_TAG_PRESENT with single bit flag and free up
VLAN.CFI overload. Now VLAN.CFI is visible in networking stack
and can be passed around intact.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michał Mirosław
2018-11-10 19:58:36 +01:00
committed by David S. Miller
parent 4b50d23179
commit 0c4b2d3705
7 changed files with 23 additions and 34 deletions
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16
include/linux/skbuff.h
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@@ -777,6 +777,14 @@ struct sk_buff {
__u8 encap_hdr_csum:1;
__u8 csum_valid:1;
#ifdef __BIG_ENDIAN_BITFIELD
#define PKT_VLAN_PRESENT_BIT 7
#else
#define PKT_VLAN_PRESENT_BIT 0
#endif
#define PKT_VLAN_PRESENT_OFFSET() offsetof(struct sk_buff, __pkt_vlan_present_offset)
__u8 __pkt_vlan_present_offset[0];
__u8 vlan_present:1;
__u8 csum_complete_sw:1;
__u8 csum_level:2;
__u8 csum_not_inet:1;
@@ -784,8 +792,8 @@ struct sk_buff {
#ifdef CONFIG_IPV6_NDISC_NODETYPE
__u8 ndisc_nodetype:2;
#endif
__u8 ipvs_property:1;
__u8 ipvs_property:1;
__u8 inner_protocol_type:1;
__u8 remcsum_offload:1;
#ifdef CONFIG_NET_SWITCHDEV
@@ -816,12 +824,6 @@ struct sk_buff {
__u32 priority;
int skb_iif;
__u32 hash;
#define PKT_VLAN_PRESENT_BIT 4 // CFI (12-th bit) in TCI
#ifdef __BIG_ENDIAN
#define PKT_VLAN_PRESENT_OFFSET() offsetof(struct sk_buff, vlan_tci)
#else
#define PKT_VLAN_PRESENT_OFFSET() (offsetof(struct sk_buff, vlan_tci) + 1)
#endif
__be16 vlan_proto;
__u16 vlan_tci;
#if defined(CONFIG_NET_RX_BUSY_POLL) || defined(CONFIG_XPS)