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。 .
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Copyright(c) 2007 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Maintained at www.Open-FCoE.org
 */

#ifndef _FC_GS_H_
#define	_FC_GS_H_

#include <linux/types.h>

/*
 * Fibre Channel Services - Common Transport.
 * From T11.org FC-GS-2 Rev 5.3 November 1998.
 */

struct fc_ct_hdr {
	__u8		ct_rev;		/* revision */
	__u8		ct_in_id[3];	/* N_Port ID of original requestor */
	__u8		ct_fs_type;	/* type of fibre channel service */
	__u8		ct_fs_subtype;	/* subtype */
	__u8		ct_options;
	__u8		_ct_resvd1;
	__be16		ct_cmd;		/* command / response code */
	__be16		ct_mr_size;	/* maximum / residual size */
	__u8		_ct_resvd2;
	__u8		ct_reason;	/* reject reason */
	__u8		ct_explan;	/* reason code explanation */
	__u8		ct_vendor;	/* vendor unique data */
};

#define	FC_CT_HDR_LEN	16	/* expected sizeof (struct fc_ct_hdr) */

enum fc_ct_rev {
	FC_CT_REV = 1		/* common transport revision */
};

/*
 * ct_fs_type values.
 */
enum fc_ct_fs_type {
	FC_FST_ALIAS =	0xf8,	/* alias service */
	FC_FST_MGMT =	0xfa,	/* management service */
	FC_FST_TIME =	0xfb,	/* time service */
	FC_FST_DIR =	0xfc,	/* directory service */
};

/*
 * ct_cmd: Command / response codes
 */
enum fc_ct_cmd {
	FC_FS_RJT =	0x8001,	/* reject */
	FC_FS_ACC =	0x8002,	/* accept */
};

/*
 * FS_RJT reason codes.
 */
enum fc_ct_reason {
	FC_FS_RJT_CMD =		0x01,	/* invalid command code */
	FC_FS_RJT_VER =		0x02,	/* invalid version level */
	FC_FS_RJT_LOG =		0x03,	/* logical error */
	FC_FS_RJT_IUSIZ =	0x04,	/* invalid IU size */
	FC_FS_RJT_BSY =		0x05,	/* logical busy */
	FC_FS_RJT_PROTO =	0x07,	/* protocol error */
	FC_FS_RJT_UNABL =	0x09,	/* unable to perform command request */
	FC_FS_RJT_UNSUP =	0x0b,	/* command not supported */
};

/*
 * FS_RJT reason code explanations.
 */
enum fc_ct_explan {
	FC_FS_EXP_NONE =	0x00,	/* no additional explanation */
	FC_FS_EXP_PID =		0x01,	/* port ID not registered */
	FC_FS_EXP_PNAM =	0x02,	/* port name not registered */
	FC_FS_EXP_NNAM =	0x03,	/* node name not registered */
	FC_FS_EXP_COS =		0x04,	/* class of service not registered */
	FC_FS_EXP_FTNR =	0x07,	/* FC-4 types not registered */
	/* definitions not complete */
};

#endif /* _FC_GS_H_ */

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