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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/mtd/nftl-user.h

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that 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
 *
 */

#ifndef __MTD_NFTL_USER_H__
#define __MTD_NFTL_USER_H__

#include <linux/types.h>

/* Block Control Information */

struct nftl_bci {
	unsigned char ECCSig[6];
	__u8 Status;
	__u8 Status1;
}__attribute__((packed));

/* Unit Control Information */

struct nftl_uci0 {
	__u16 VirtUnitNum;
	__u16 ReplUnitNum;
	__u16 SpareVirtUnitNum;
	__u16 SpareReplUnitNum;
} __attribute__((packed));

struct nftl_uci1 {
	__u32 WearInfo;
	__u16 EraseMark;
	__u16 EraseMark1;
} __attribute__((packed));

struct nftl_uci2 {
        __u16 FoldMark;
        __u16 FoldMark1;
	__u32 unused;
} __attribute__((packed));

union nftl_uci {
	struct nftl_uci0 a;
	struct nftl_uci1 b;
	struct nftl_uci2 c;
};

struct nftl_oob {
	struct nftl_bci b;
	union nftl_uci u;
};

/* NFTL Media Header */

struct NFTLMediaHeader {
	char DataOrgID[6];
	__u16 NumEraseUnits;
	__u16 FirstPhysicalEUN;
	__u32 FormattedSize;
	unsigned char UnitSizeFactor;
} __attribute__((packed));

#define MAX_ERASE_ZONES (8192 - 512)

#define ERASE_MARK 0x3c69
#define SECTOR_FREE 0xff
#define SECTOR_USED 0x55
#define SECTOR_IGNORE 0x11
#define SECTOR_DELETED 0x00

#define FOLD_MARK_IN_PROGRESS 0x5555

#define ZONE_GOOD 0xff
#define ZONE_BAD_ORIGINAL 0
#define ZONE_BAD_MARKED 7


#endif /* __MTD_NFTL_USER_H__ */

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