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authorchetan loke <loke.chetan@gmail.com>2011-08-19 10:18:15 +0000
committerDavid S. Miller <davem@davemloft.net>2011-08-24 19:40:39 -0700
commit0d4691ce112be025019999df5f2a5e00c03f03c2 (patch)
tree629146e87693072a265bdb96b99c84605a1a9ce2 /include/linux/if_packet.h
parent44331fe2aa0d7eed54e68484df58e9e00aee0f6e (diff)
downloadlwn-0d4691ce112be025019999df5f2a5e00c03f03c2.tar.gz
lwn-0d4691ce112be025019999df5f2a5e00c03f03c2.zip
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>
Diffstat (limited to 'include/linux/if_packet.h')
-rw-r--r--include/linux/if_packet.h119
1 files changed, 119 insertions, 0 deletions
diff --git a/include/linux/if_packet.h b/include/linux/if_packet.h
index c1486060f5ed..5926d59c4295 100644
--- a/include/linux/if_packet.h
+++ b/include/linux/if_packet.h
@@ -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;