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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/vdpa.h

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
 * vdpa device management interface
 * Copyright (c) 2020 Mellanox Technologies Ltd. All rights reserved.
 */

#ifndef _LINUX_VDPA_H_
#define _LINUX_VDPA_H_

#define VDPA_GENL_NAME "vdpa"
#define VDPA_GENL_VERSION 0x1

enum vdpa_command {
	VDPA_CMD_UNSPEC,
	VDPA_CMD_MGMTDEV_NEW,
	VDPA_CMD_MGMTDEV_GET,		/* can dump */
	VDPA_CMD_DEV_NEW,
	VDPA_CMD_DEV_DEL,
	VDPA_CMD_DEV_GET,		/* can dump */
	VDPA_CMD_DEV_CONFIG_GET,	/* can dump */
};

enum vdpa_attr {
	VDPA_ATTR_UNSPEC,

	/* Pad attribute for 64b alignment */
	VDPA_ATTR_PAD = VDPA_ATTR_UNSPEC,

	/* bus name (optional) + dev name together make the parent device handle */
	VDPA_ATTR_MGMTDEV_BUS_NAME,		/* string */
	VDPA_ATTR_MGMTDEV_DEV_NAME,		/* string */
	VDPA_ATTR_MGMTDEV_SUPPORTED_CLASSES,	/* u64 */

	VDPA_ATTR_DEV_NAME,			/* string */
	VDPA_ATTR_DEV_ID,			/* u32 */
	VDPA_ATTR_DEV_VENDOR_ID,		/* u32 */
	VDPA_ATTR_DEV_MAX_VQS,			/* u32 */
	VDPA_ATTR_DEV_MAX_VQ_SIZE,		/* u16 */
	VDPA_ATTR_DEV_MIN_VQ_SIZE,		/* u16 */

	VDPA_ATTR_DEV_NET_CFG_MACADDR,		/* binary */
	VDPA_ATTR_DEV_NET_STATUS,		/* u8 */
	VDPA_ATTR_DEV_NET_CFG_MAX_VQP,		/* u16 */
	VDPA_ATTR_DEV_NET_CFG_MTU,		/* u16 */

	VDPA_ATTR_DEV_NEGOTIATED_FEATURES,	/* u64 */
	VDPA_ATTR_DEV_MGMTDEV_MAX_VQS,		/* u32 */
	VDPA_ATTR_DEV_SUPPORTED_FEATURES,	/* u64 */
	/* new attributes must be added above here */
	VDPA_ATTR_MAX,
};

#endif

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