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tcp: move tcp_skb_cb->sacked flags to enum

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Move the flag definitions for tcp_skb_cb->sacked into a new enum named
tcp_skb_cb_sacked_flags, then we can get access to them in bpf via
vmlinux.h, e.g., in tracepoints.

This patch does not change any existing functionality.

Signed-off-by: Philo Lu <lulie@linux.alibaba.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Philo Lu 2024-04-21 12:20:08 +08:00 committed by David S. Miller
parent d806871612
commit 14b5fb2145
1 changed files with 13 additions and 9 deletions
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22
include/net/tcp.h
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@ -928,6 +928,19 @@ static inline u32 tcp_rsk_tsval(const struct tcp_request_sock *treq)
#define TCPHDR_SYN_ECN (TCPHDR_SYN | TCPHDR_ECE | TCPHDR_CWR)
/* State flags for sacked in struct tcp_skb_cb */
enum tcp_skb_cb_sacked_flags {
TCPCB_SACKED_ACKED = (1 << 0), /* SKB ACK'd by a SACK block */
TCPCB_SACKED_RETRANS = (1 << 1), /* SKB retransmitted */
TCPCB_LOST = (1 << 2), /* SKB is lost */
TCPCB_TAGBITS = (TCPCB_SACKED_ACKED | TCPCB_SACKED_RETRANS |
TCPCB_LOST), /* All tag bits */
TCPCB_REPAIRED = (1 << 4), /* SKB repaired (no skb_mstamp_ns) */
TCPCB_EVER_RETRANS = (1 << 7), /* Ever retransmitted frame */
TCPCB_RETRANS = (TCPCB_SACKED_RETRANS | TCPCB_EVER_RETRANS |
TCPCB_REPAIRED),
};
/* This is what the send packet queuing engine uses to pass
* TCP per-packet control information to the transmission code.
* We also store the host-order sequence numbers in here too.
@ -950,15 +963,6 @@ struct tcp_skb_cb {
__u8 tcp_flags; /* TCP header flags. (tcp[13]) */
__u8 sacked; /* State flags for SACK. */
#define TCPCB_SACKED_ACKED 0x01 /* SKB ACK'd by a SACK block */
#define TCPCB_SACKED_RETRANS 0x02 /* SKB retransmitted */
#define TCPCB_LOST 0x04 /* SKB is lost */
#define TCPCB_TAGBITS 0x07 /* All tag bits */
#define TCPCB_REPAIRED 0x10 /* SKB repaired (no skb_mstamp_ns) */
#define TCPCB_EVER_RETRANS 0x80 /* Ever retransmitted frame */
#define TCPCB_RETRANS (TCPCB_SACKED_RETRANS|TCPCB_EVER_RETRANS| \
TCPCB_REPAIRED)
__u8 ip_dsfield; /* IPv4 tos or IPv6 dsfield */
__u8 txstamp_ack:1, /* Record TX timestamp for ack? */
eor:1, /* Is skb MSG_EOR marked? */