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hc
2024-02-19 151fecfb72a0d602dfe79790602ef64b4e241574 
 kernel/include/uapi/linux/tcp.h
....@@ -127,6 +127,9 @@
127127 
128128 #define TCP_CM_INQ		TCP_INQ
129129 
130
+#define TCP_TX_DELAY		37	/* delay outgoing packets by XX usec */
131
+
132
+
130133 #define TCP_REPAIR_ON		1
131134 #define TCP_REPAIR_OFF		0
132135 #define TCP_REPAIR_OFF_NO_WP	-1	/* Turn off without window probes */
....@@ -152,6 +155,14 @@
152155 	TCP_QUEUES_NR,
153156 };
154157 
158
+/* why fastopen failed from client perspective */
159
+enum tcp_fastopen_client_fail {
160
+	TFO_STATUS_UNSPEC, /* catch-all */
161
+	TFO_COOKIE_UNAVAILABLE, /* if not in TFO_CLIENT_NO_COOKIE mode */
162
+	TFO_DATA_NOT_ACKED, /* SYN-ACK did not ack SYN data */
163
+	TFO_SYN_RETRANSMITTED, /* SYN-ACK did not ack SYN data after timeout */
164
+};
165
+
155166 /* for TCP_INFO socket option */
156167 #define TCPI_OPT_TIMESTAMPS	1
157168 #define TCPI_OPT_SACK		2
....@@ -160,15 +171,42 @@
160171 #define TCPI_OPT_ECN_SEEN	16 /* we received at least one packet with ECT */
161172 #define TCPI_OPT_SYN_DATA	32 /* SYN-ACK acked data in SYN sent or rcvd */
162173 
174
+/*
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+ * Sender's congestion state indicating normal or abnormal situations
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+ * in the last round of packets sent. The state is driven by the ACK
177
+ * information and timer events.
178
+ */
163179 enum tcp_ca_state {
180
+	/*
181
+	 * Nothing bad has been observed recently.
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+	 * No apparent reordering, packet loss, or ECN marks.
183
+	 */
164184 	TCP_CA_Open = 0,
165185 #define TCPF_CA_Open	(1<<TCP_CA_Open)
186
+	/*
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+	 * The sender enters disordered state when it has received DUPACKs or
188
+	 * SACKs in the last round of packets sent. This could be due to packet
189
+	 * loss or reordering but needs further information to confirm packets
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+	 * have been lost.
191
+	 */
166192 	TCP_CA_Disorder = 1,
167193 #define TCPF_CA_Disorder (1<<TCP_CA_Disorder)
194
+	/*
195
+	 * The sender enters Congestion Window Reduction (CWR) state when it
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+	 * has received ACKs with ECN-ECE marks, or has experienced congestion
197
+	 * or packet discard on the sender host (e.g. qdisc).
198
+	 */
168199 	TCP_CA_CWR = 2,
169200 #define TCPF_CA_CWR	(1<<TCP_CA_CWR)
201
+	/*
202
+	 * The sender is in fast recovery and retransmitting lost packets,
203
+	 * typically triggered by ACK events.
204
+	 */
170205 	TCP_CA_Recovery = 3,
171206 #define TCPF_CA_Recovery (1<<TCP_CA_Recovery)
207
+	/*
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+	 * The sender is in loss recovery triggered by retransmission timeout.
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+	 */
172210 	TCP_CA_Loss = 4
173211 #define TCPF_CA_Loss	(1<<TCP_CA_Loss)
174212 };
....@@ -181,7 +219,7 @@
181219 	__u8	tcpi_backoff;
182220 	__u8	tcpi_options;
183221 	__u8	tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
184
-	__u8	tcpi_delivery_rate_app_limited:1;
222
+	__u8	tcpi_delivery_rate_app_limited:1, tcpi_fastopen_client_fail:2;
185223 
186224 	__u32	tcpi_rto;
187225 	__u32	tcpi_ato;
....@@ -240,6 +278,12 @@
240278 	__u64	tcpi_bytes_retrans;  /* RFC4898 tcpEStatsPerfOctetsRetrans */
241279 	__u32	tcpi_dsack_dups;     /* RFC4898 tcpEStatsStackDSACKDups */
242280 	__u32	tcpi_reord_seen;     /* reordering events seen */
281
+
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+	__u32	tcpi_rcv_ooopack;    /* Out-of-order packets received */
283
+
284
+	__u32	tcpi_snd_wnd;	     /* peer's advertised receive window after
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+				      * scaling (bytes)
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+				      */
243287 };
244288 
245289 /* netlink attributes types for SCM_TIMESTAMPING_OPT_STATS */
....@@ -266,20 +310,25 @@
266310 	TCP_NLA_BYTES_RETRANS,	/* Data bytes retransmitted */
267311 	TCP_NLA_DSACK_DUPS,	/* DSACK blocks received */
268312 	TCP_NLA_REORD_SEEN,	/* reordering events seen */
313
+	TCP_NLA_SRTT,		/* smoothed RTT in usecs */
314
+	TCP_NLA_TIMEOUT_REHASH, /* Timeout-triggered rehash attempts */
315
+	TCP_NLA_BYTES_NOTSENT,	/* Bytes in write queue not yet sent */
316
+	TCP_NLA_EDT,		/* Earliest departure time (CLOCK_MONOTONIC) */
269317 };
270318 
271319 /* for TCP_MD5SIG socket option */
272320 #define TCP_MD5SIG_MAXKEYLEN	80
273321 
274322 /* tcp_md5sig extension flags for TCP_MD5SIG_EXT */
275
-#define TCP_MD5SIG_FLAG_PREFIX		1	/* address prefix length */
323
+#define TCP_MD5SIG_FLAG_PREFIX		0x1	/* address prefix length */
324
+#define TCP_MD5SIG_FLAG_IFINDEX		0x2	/* ifindex set */
276325 
277326 struct tcp_md5sig {
278327 	struct __kernel_sockaddr_storage tcpm_addr;	/* address associated */
279328 	__u8	tcpm_flags;				/* extension flags */
280329 	__u8	tcpm_prefixlen;				/* address prefix */
281330 	__u16	tcpm_keylen;				/* key length */
282
-	__u32	__tcpm_pad;				/* zero */
331
+	int	tcpm_ifindex;				/* device index for scope */
283332 	__u8	tcpm_key[TCP_MD5SIG_MAXKEYLEN];		/* key (binary) */
284333 };
285334 
....@@ -298,5 +347,9 @@
298347 	__u64 address;		/* in: address of mapping */
299348 	__u32 length;		/* in/out: number of bytes to map/mapped */
300349 	__u32 recv_skip_hint;	/* out: amount of bytes to skip */
350
+	__u32 inq; /* out: amount of bytes in read queue */
351
+	__s32 err; /* out: socket error */
352
+	__u64 copybuf_address;	/* in: copybuf address (small reads) */
353
+	__s32 copybuf_len; /* in/out: copybuf bytes avail/used or error */
301354 };
302355 #endif /* _UAPI_LINUX_TCP_H */