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　晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 . Prv8 Shell

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Current File : //usr/include/linux/psample.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef __UAPI_PSAMPLE_H
#define __UAPI_PSAMPLE_H

enum {
	PSAMPLE_ATTR_IIFINDEX,
	PSAMPLE_ATTR_OIFINDEX,
	PSAMPLE_ATTR_ORIGSIZE,
	PSAMPLE_ATTR_SAMPLE_GROUP,
	PSAMPLE_ATTR_GROUP_SEQ,
	PSAMPLE_ATTR_SAMPLE_RATE,
	PSAMPLE_ATTR_DATA,
	PSAMPLE_ATTR_GROUP_REFCOUNT,
	PSAMPLE_ATTR_TUNNEL,

	PSAMPLE_ATTR_PAD,
	PSAMPLE_ATTR_OUT_TC,		/* u16 */
	PSAMPLE_ATTR_OUT_TC_OCC,	/* u64, bytes */
	PSAMPLE_ATTR_LATENCY,		/* u64, nanoseconds */
	PSAMPLE_ATTR_TIMESTAMP,		/* u64, nanoseconds */
	PSAMPLE_ATTR_PROTO,		/* u16 */

	__PSAMPLE_ATTR_MAX
};

enum psample_command {
	PSAMPLE_CMD_SAMPLE,
	PSAMPLE_CMD_GET_GROUP,
	PSAMPLE_CMD_NEW_GROUP,
	PSAMPLE_CMD_DEL_GROUP,
};

enum psample_tunnel_key_attr {
	PSAMPLE_TUNNEL_KEY_ATTR_ID,                 /* be64 Tunnel ID */
	PSAMPLE_TUNNEL_KEY_ATTR_IPV4_SRC,           /* be32 src IP address. */
	PSAMPLE_TUNNEL_KEY_ATTR_IPV4_DST,           /* be32 dst IP address. */
	PSAMPLE_TUNNEL_KEY_ATTR_TOS,                /* u8 Tunnel IP ToS. */
	PSAMPLE_TUNNEL_KEY_ATTR_TTL,                /* u8 Tunnel IP TTL. */
	PSAMPLE_TUNNEL_KEY_ATTR_DONT_FRAGMENT,      /* No argument, set DF. */
	PSAMPLE_TUNNEL_KEY_ATTR_CSUM,               /* No argument. CSUM packet. */
	PSAMPLE_TUNNEL_KEY_ATTR_OAM,                /* No argument. OAM frame.  */
	PSAMPLE_TUNNEL_KEY_ATTR_GENEVE_OPTS,        /* Array of Geneve options. */
	PSAMPLE_TUNNEL_KEY_ATTR_TP_SRC,	            /* be16 src Transport Port. */
	PSAMPLE_TUNNEL_KEY_ATTR_TP_DST,		    /* be16 dst Transport Port. */
	PSAMPLE_TUNNEL_KEY_ATTR_VXLAN_OPTS,	    /* Nested VXLAN opts* */
	PSAMPLE_TUNNEL_KEY_ATTR_IPV6_SRC,           /* struct in6_addr src IPv6 address. */
	PSAMPLE_TUNNEL_KEY_ATTR_IPV6_DST,           /* struct in6_addr dst IPv6 address. */
	PSAMPLE_TUNNEL_KEY_ATTR_PAD,
	PSAMPLE_TUNNEL_KEY_ATTR_ERSPAN_OPTS,        /* struct erspan_metadata */
	PSAMPLE_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE,   /* No argument. IPV4_INFO_BRIDGE mode.*/
	__PSAMPLE_TUNNEL_KEY_ATTR_MAX
};

/* Can be overridden at runtime by module option */
#define PSAMPLE_ATTR_MAX (__PSAMPLE_ATTR_MAX - 1)

#define PSAMPLE_NL_MCGRP_CONFIG_NAME "config"
#define PSAMPLE_NL_MCGRP_SAMPLE_NAME "packets"
#define PSAMPLE_GENL_NAME "psample"
#define PSAMPLE_GENL_VERSION 1

#endif

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