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