af-packet: Added TPACKET_V3 headers. (0d4691ce) · Commits · e / devices / android_kernel_xiaomi_markw

include/linux/if_packet.h

+119 −0

Original line number	Diff line number	Diff line
		@@ -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;