ufs_fs.h

UnixBSD、SunOs、FreeBSD、NetBSD、OpenBSD和NeXTStep文件系统源代码

	} ui_u3;
};

#define UFS_NXADDR  2            /* External addresses in inode. */
struct ufs2_inode {
	__fs16     ui_mode;        /*   0: IFMT, permissions; see below. */
	__fs16     ui_nlink;       /*   2: File link count. */
	__fs32     ui_uid;         /*   4: File owner. */
	__fs32     ui_gid;         /*   8: File group. */
	__fs32     ui_blksize;     /*  12: Inode blocksize. */
	__fs64     ui_size;        /*  16: File byte count. */
	__fs64     ui_blocks;      /*  24: Bytes actually held. */
	__fs64   ui_atime;       /*  32: Last access time. */
	__fs64   ui_mtime;       /*  40: Last modified time. */
	__fs64   ui_ctime;       /*  48: Last inode change time. */
	__fs64   ui_birthtime;   /*  56: Inode creation time. */
	__fs32     ui_mtimensec;   /*  64: Last modified time. */
	__fs32     ui_atimensec;   /*  68: Last access time. */
	__fs32     ui_ctimensec;   /*  72: Last inode change time. */
	__fs32     ui_birthnsec;   /*  76: Inode creation time. */
	__fs32     ui_gen;         /*  80: Generation number. */
	__fs32     ui_kernflags;   /*  84: Kernel flags. */
	__fs32     ui_flags;       /*  88: Status flags (chflags). */
	__fs32     ui_extsize;     /*  92: External attributes block. */
	__fs64     ui_extb[UFS_NXADDR];/*  96: External attributes block. */
	union {
		struct {
			__fs64     ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */
			__fs64     ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/
		} ui_addr;
	__u8	ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
	} ui_u2;
	__fs64     ui_spare[3];    /* 232: Reserved; currently unused */
};


/* FreeBSD has these in sys/stat.h */
/* ui_flags that can be set by a file owner */
#define UFS_UF_SETTABLE   0x0000ffff
#define UFS_UF_NODUMP     0x00000001  /* do not dump */
#define UFS_UF_IMMUTABLE  0x00000002  /* immutable (can't "change") */
#define UFS_UF_APPEND     0x00000004  /* append-only */
#define UFS_UF_OPAQUE     0x00000008  /* directory is opaque (unionfs) */
#define UFS_UF_NOUNLINK   0x00000010  /* can't be removed or renamed */
/* ui_flags that only root can set */
#define UFS_SF_SETTABLE   0xffff0000
#define UFS_SF_ARCHIVED   0x00010000  /* archived */
#define UFS_SF_IMMUTABLE  0x00020000  /* immutable (can't "change") */
#define UFS_SF_APPEND     0x00040000  /* append-only */
#define UFS_SF_NOUNLINK   0x00100000  /* can't be removed or renamed */

/*
 * This structure is used for reading disk structures larger
 * than the size of fragment.
 */
struct ufs_buffer_head {
	__u64 fragment;			/* first fragment */
	__u64 count;				/* number of fragments */
	struct buffer_head * bh[UFS_MAXFRAG];	/* buffers */
};

struct ufs_cg_private_info {
	struct ufs_buffer_head c_ubh;
	__u32	c_cgx;		/* number of cylidner group */
	__u16	c_ncyl;		/* number of cyl's this cg */
	__u16	c_niblk;	/* number of inode blocks this cg */
	__u32	c_ndblk;	/* number of data blocks this cg */
	__u32	c_rotor;	/* position of last used block */
	__u32	c_frotor;	/* position of last used frag */
	__u32	c_irotor;	/* position of last used inode */
	__u32	c_btotoff;	/* (__u32) block totals per cylinder */
	__u32	c_boff;		/* (short) free block positions */
	__u32	c_iusedoff;	/* (char) used inode map */
	__u32	c_freeoff;	/* (u_char) free block map */
	__u32	c_nextfreeoff;	/* (u_char) next available space */
	__u32	c_clustersumoff;/* (u_int32) counts of avail clusters */
	__u32	c_clusteroff;	/* (u_int8) free cluster map */
	__u32	c_nclusterblks;	/* number of clusters this cg */
};


struct ufs_sb_private_info {
	struct ufs_buffer_head s_ubh; /* buffer containing super block */
	struct ufs_csum_core cs_total;
	__u32	s_sblkno;	/* offset of super-blocks in filesys */
	__u32	s_cblkno;	/* offset of cg-block in filesys */
	__u32	s_iblkno;	/* offset of inode-blocks in filesys */
	__u32	s_dblkno;	/* offset of first data after cg */
	__u32	s_cgoffset;	/* cylinder group offset in cylinder */
	__u32	s_cgmask;	/* used to calc mod fs_ntrak */
	__u32	s_size;		/* number of blocks (fragments) in fs */
	__u32	s_dsize;	/* number of data blocks in fs */
	__u64	s_u2_size;	/* ufs2: number of blocks (fragments) in fs */
	__u64	s_u2_dsize;	/*ufs2:  number of data blocks in fs */
	__u32	s_ncg;		/* number of cylinder groups */
	__u32	s_bsize;	/* size of basic blocks */
	__u32	s_fsize;	/* size of fragments */
	__u32	s_fpb;		/* fragments per block */
	__u32	s_minfree;	/* minimum percentage of free blocks */
	__u32	s_bmask;	/* `blkoff'' calc of blk offsets */
	__u32	s_fmask;	/* s_fsize mask */
	__u32	s_bshift;	/* `lblkno'' calc of logical blkno */
	__u32   s_fshift;	/* s_fsize shift */
	__u32	s_fpbshift;	/* fragments per block shift */
	__u32	s_fsbtodb;	/* fsbtodb and dbtofsb shift constant */
	__u32	s_sbsize;	/* actual size of super block */
	__u32   s_csmask;	/* csum block offset */
	__u32	s_csshift;	/* csum block number */
	__u32	s_nindir;	/* value of NINDIR */
	__u32	s_inopb;	/* value of INOPB */
	__u32	s_nspf;		/* value of NSPF */
	__u32	s_npsect;	/* # sectors/track including spares */
	__u32	s_interleave;	/* hardware sector interleave */
	__u32	s_trackskew;	/* sector 0 skew, per track */
	__u64	s_csaddr;	/* blk addr of cyl grp summary area */
	__u32	s_cssize;	/* size of cyl grp summary area */
	__u32	s_cgsize;	/* cylinder group size */
	__u32	s_ntrak;	/* tracks per cylinder */
	__u32	s_nsect;	/* sectors per track */
	__u32	s_spc;		/* sectors per cylinder */
	__u32	s_ipg;		/* inodes per cylinder group */
	__u32	s_fpg;		/* fragments per group */
	__u32	s_cpc;		/* cyl per cycle in postbl */
	__s32	s_contigsumsize;/* size of cluster summary array, 44bsd */
	__s64	s_qbmask;	/* ~usb_bmask */
	__s64	s_qfmask;	/* ~usb_fmask */
	__s32	s_postblformat;	/* format of positional layout tables */
	__s32	s_nrpos;	/* number of rotational positions */
        __s32	s_postbloff;	/* (__s16) rotation block list head */
	__s32	s_rotbloff;	/* (__u8) blocks for each rotation */

	__u32	s_fpbmask;	/* fragments per block mask */
	__u32	s_apb;		/* address per block */
	__u32	s_2apb;		/* address per block^2 */
	__u32	s_3apb;		/* address per block^3 */
	__u32	s_apbmask;	/* address per block mask */
	__u32	s_apbshift;	/* address per block shift */
	__u32	s_2apbshift;	/* address per block shift * 2 */
	__u32	s_3apbshift;	/* address per block shift * 3 */
	__u32	s_nspfshift;	/* number of sector per fragment shift */
	__u32	s_nspb;		/* number of sector per block */
	__u32	s_inopf;	/* inodes per fragment */
	__u32	s_sbbase;	/* offset of NeXTstep superblock */
	__u32	s_bpf;		/* bits per fragment */
	__u32	s_bpfshift;	/* bits per fragment shift*/
	__u32	s_bpfmask;	/* bits per fragment mask */

	__u32	s_maxsymlinklen;/* upper limit on fast symlinks' size */
	__s32	fs_magic;       /* filesystem magic */
	unsigned int s_dirblksize;
};

/*
 * Sizes of this structures are:
 *	ufs_super_block_first	512
 *	ufs_super_block_second	512
 *	ufs_super_block_third	356
 */
struct ufs_super_block_first {
	union {
		struct {
			__fs32	fs_link;	/* UNUSED */
		} fs_42;
		struct {
			__fs32	fs_state;	/* file system state flag */
		} fs_sun;
	} fs_u0;
	__fs32	fs_rlink;
	__fs32	fs_sblkno;
	__fs32	fs_cblkno;
	__fs32	fs_iblkno;
	__fs32	fs_dblkno;
	__fs32	fs_cgoffset;
	__fs32	fs_cgmask;
	__fs32	fs_time;
	__fs32	fs_size;
	__fs32	fs_dsize;
	__fs32	fs_ncg;
	__fs32	fs_bsize;
	__fs32	fs_fsize;
	__fs32	fs_frag;
	__fs32	fs_minfree;
	__fs32	fs_rotdelay;
	__fs32	fs_rps;
	__fs32	fs_bmask;
	__fs32	fs_fmask;
	__fs32	fs_bshift;
	__fs32	fs_fshift;
	__fs32	fs_maxcontig;
	__fs32	fs_maxbpg;
	__fs32	fs_fragshift;
	__fs32	fs_fsbtodb;
	__fs32	fs_sbsize;
	__fs32	fs_csmask;
	__fs32	fs_csshift;
	__fs32	fs_nindir;
	__fs32	fs_inopb;
	__fs32	fs_nspf;
	__fs32	fs_optim;
	union {
		struct {
			__fs32	fs_npsect;
		} fs_sun;
		struct {
			__fs32	fs_state;
		} fs_sunx86;
	} fs_u1;
	__fs32	fs_interleave;
	__fs32	fs_trackskew;
	__fs32	fs_id[2];
	__fs32	fs_csaddr;
	__fs32	fs_cssize;
	__fs32	fs_cgsize;
	__fs32	fs_ntrak;
	__fs32	fs_nsect;
	__fs32	fs_spc;
	__fs32	fs_ncyl;
	__fs32	fs_cpg;
	__fs32	fs_ipg;
	__fs32	fs_fpg;
	struct ufs_csum fs_cstotal;
	__s8	fs_fmod;
	__s8	fs_clean;
	__s8	fs_ronly;
	__s8	fs_flags;
	__s8	fs_fsmnt[UFS_MAXMNTLEN - 212];

};

struct ufs_super_block_second {
	union {
		struct {
			__s8	fs_fsmnt[212];
			__fs32	fs_cgrotor;
			__fs32	fs_csp[UFS_MAXCSBUFS];
			__fs32	fs_maxcluster;
			__fs32	fs_cpc;
			__fs16	fs_opostbl[82];
		} fs_u1;
		struct {
			__s8  fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212];
			__u8   fs_volname[UFS2_MAXVOLLEN];
			__fs64  fs_swuid;
			__fs32  fs_pad;
			__fs32   fs_cgrotor;
			__fs32   fs_ocsp[UFS2_NOCSPTRS];
			__fs32   fs_contigdirs;
			__fs32   fs_csp;
			__fs32   fs_maxcluster;
			__fs32   fs_active;
			__fs32   fs_old_cpc;
			__fs32   fs_maxbsize;
			__fs64   fs_sparecon64[17];
			__fs64   fs_sblockloc;
			__fs64	cs_ndir;
			__fs64	cs_nbfree;
		} fs_u2;
	} fs_un;
};

struct ufs_super_block_third {
	union {
		struct {
			__fs16	fs_opostbl[46];
		} fs_u1;
		struct {
			__fs64	cs_nifree;	/* number of free inodes */
			__fs64	cs_nffree;	/* number of free frags */
			__fs64   cs_numclusters;	/* number of free clusters */
			__fs64   cs_spare[3];	/* future expansion */
			struct  ufs_timeval    fs_time;		/* last time written */
			__fs64    fs_size;		/* number of blocks in fs */
			__fs64    fs_dsize;	/* number of data blocks in fs */
			__fs64   fs_csaddr;	/* blk addr of cyl grp summary area */
			__fs64    fs_pendingblocks;/* blocks in process of being freed */
			__fs32    fs_pendinginodes;/*inodes in process of being freed */
		} __attribute__ ((packed)) fs_u2;
	} fs_un1;
	union {
		struct {
			__fs32	fs_sparecon[53];/* reserved for future constants */
			__fs32	fs_reclaim;
			__fs32	fs_sparecon2[1];
			__fs32	fs_state;	/* file system state time stamp */
			__fs32	fs_qbmask[2];	/* ~usb_bmask */
			__fs32	fs_qfmask[2];	/* ~usb_fmask */
		} fs_sun;
		struct {
			__fs32	fs_sparecon[53];/* reserved for future constants */
			__fs32	fs_reclaim;
			__fs32	fs_sparecon2[1];
			__fs32	fs_npsect;	/* # sectors/track including spares */
			__fs32	fs_qbmask[2];	/* ~usb_bmask */
			__fs32	fs_qfmask[2];	/* ~usb_fmask */
		} fs_sunx86;
		struct {
			__fs32	fs_sparecon[50];/* reserved for future constants */
			__fs32	fs_contigsumsize;/* size of cluster summary array */
			__fs32	fs_maxsymlinklen;/* max length of an internal symlink */
			__fs32	fs_inodefmt;	/* format of on-disk inodes */
			__fs32	fs_maxfilesize[2];	/* max representable file size */
			__fs32	fs_qbmask[2];	/* ~usb_bmask */
			__fs32	fs_qfmask[2];	/* ~usb_fmask */
			__fs32	fs_state;	/* file system state time stamp */
		} fs_44;
	} fs_un2;
	__fs32	fs_postblformat;
	__fs32	fs_nrpos;
	__fs32	fs_postbloff;
	__fs32	fs_rotbloff;
	__fs32	fs_magic;
	__u8	fs_space[1];
};

#endif /* __LINUX_UFS_FS_H */