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af-packet: Added TPACKET_V3 headers.

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Added TPACKET_V3 definitions.

Signed-off-by: Chetan Loke <loke.chetan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
chetan loke 2011-08-19 10:18:15 +00:00 committed by David S. Miller
parent 44331fe2aa
commit 0d4691ce11
1 changed files with 119 additions and 0 deletions
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119
include/linux/if_packet.h
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@ -61,6 +61,17 @@ struct tpacket_stats {
unsigned int tp_drops;
};
struct tpacket_stats_v3 {
unsigned int tp_packets;
unsigned int tp_drops;
unsigned int tp_freeze_q_cnt;
};
union tpacket_stats_u {
struct tpacket_stats stats1;
struct tpacket_stats_v3 stats3;
};
struct tpacket_auxdata {
__u32 tp_status;
__u32 tp_len;
@ -78,6 +89,7 @@ struct tpacket_auxdata {
#define TP_STATUS_LOSING 0x4
#define TP_STATUS_CSUMNOTREADY 0x8
#define TP_STATUS_VLAN_VALID 0x10 /* auxdata has valid tp_vlan_tci */
#define TP_STATUS_BLK_TMO 0x20
/* Tx ring - header status */
#define TP_STATUS_AVAILABLE 0x0
@ -85,6 +97,9 @@ struct tpacket_auxdata {
#define TP_STATUS_SENDING 0x2
#define TP_STATUS_WRONG_FORMAT 0x4
/* Rx ring - feature request bits */
#define TP_FT_REQ_FILL_RXHASH 0x1
struct tpacket_hdr {
unsigned long tp_status;
unsigned int tp_len;
@ -111,11 +126,100 @@ struct tpacket2_hdr {
__u16 tp_padding;
};
struct hdr_variant1 {
__u32 tp_rxhash;
__u32 tp_vlan_tci;
};
struct tpacket3_hdr {
__u32 tp_next_offset;
__u32 tp_sec;
__u32 tp_nsec;
__u32 tp_snaplen;
__u32 tp_len;
__u32 tp_status;
__u16 tp_mac;
__u16 tp_net;
/* pkt_hdr variants */
union {
struct hdr_variant1 hv1;
};
};
struct bd_ts {
unsigned int ts_sec;
union {
unsigned int ts_usec;
unsigned int ts_nsec;
};
};
struct hdr_v1 {
__u32 block_status;
__u32 num_pkts;
__u32 offset_to_first_pkt;
/* Number of valid bytes (including padding)
* blk_len <= tp_block_size
*/
__u32 blk_len;
/*
* Quite a few uses of sequence number:
* 1. Make sure cache flush etc worked.
* Well, one can argue - why not use the increasing ts below?
* But look at 2. below first.
* 2. When you pass around blocks to other user space decoders,
* you can see which blk[s] is[are] outstanding etc.
* 3. Validate kernel code.
*/
aligned_u64 seq_num;
/*
* ts_last_pkt:
*
* Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out)
* ts_last_pkt == 'time-stamp of last packet' and NOT the
* time when the timer fired and the block was closed.
* By providing the ts of the last packet we can absolutely
* guarantee that time-stamp wise, the first packet in the
* next block will never precede the last packet of the
* previous block.
* Case 2. Block has zero packets and TMO'd
* ts_last_pkt = time when the timer fired and the block
* was closed.
* Case 3. Block has 'N' packets and NO TMO.
* ts_last_pkt = time-stamp of the last pkt in the block.
*
* ts_first_pkt:
* Is always the time-stamp when the block was opened.
* Case a) ZERO packets
* No packets to deal with but atleast you know the
* time-interval of this block.
* Case b) Non-zero packets
* Use the ts of the first packet in the block.
*
*/
struct bd_ts ts_first_pkt, ts_last_pkt;
};
union bd_header_u {
struct hdr_v1 bh1;
};
struct block_desc {
__u32 version;
__u32 offset_to_priv;
union bd_header_u hdr;
};
#define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
#define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
enum tpacket_versions {
TPACKET_V1,
TPACKET_V2,
TPACKET_V3
};
/*
@ -138,6 +242,21 @@ struct tpacket_req {
unsigned int tp_frame_nr; /* Total number of frames */
};
struct tpacket_req3 {
unsigned int tp_block_size; /* Minimal size of contiguous block */
unsigned int tp_block_nr; /* Number of blocks */
unsigned int tp_frame_size; /* Size of frame */
unsigned int tp_frame_nr; /* Total number of frames */
unsigned int tp_retire_blk_tov; /* timeout in msecs */
unsigned int tp_sizeof_priv; /* offset to private data area */
unsigned int tp_feature_req_word;
};
union tpacket_req_u {
struct tpacket_req req;
struct tpacket_req3 req3;
};
struct packet_mreq {
int mr_ifindex;
unsigned short mr_type;