316 lines
8.1 KiB
C
316 lines
8.1 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* $Id: libdisk.h,v 1.18.2.2 1995/06/05 02:24:32 jkh Exp $
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*
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*/
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#define MAX_NO_DISKS 20
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/* Max # of disks Disk_Names() will return */
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typedef enum {
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whole,
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unknown,
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fat,
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freebsd,
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extended,
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part,
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unused,
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} chunk_e;
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extern char *chunk_n[];
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struct disk {
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char *name;
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u_long flags;
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# define DISK_ON_TRACK 1
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#if 0
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u_long real_cyl;
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u_long real_hd;
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u_long real_sect;
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#endif
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u_long bios_cyl;
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u_long bios_hd;
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u_long bios_sect;
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u_char *bootmgr;
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u_char *boot1;
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u_char *boot2;
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struct chunk *chunks;
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};
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struct chunk {
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struct chunk *next;
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struct chunk *part;
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struct disk *disk;
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long offset;
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u_long size;
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u_long end;
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char *name;
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char *oname;
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/* Used during Fixup_Names() to avoid renaming more than
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* absolutely needed.
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*/
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chunk_e type;
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int subtype;
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u_long flags;
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# define CHUNK_PAST_1024 1
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/* this chunk cannot be booted from because it
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* extends past cylinder 1024
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*/
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# define CHUNK_BSD_COMPAT 2
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/* this chunk is in the BSD-compatibility, and has a
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* short name too, ie wd0s4f -> wd0f
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*/
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# define CHUNK_BAD144 4
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/* this chunk has bad144 mapping */
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# define CHUNK_ALIGN 8
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/* This chunk should be aligned */
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# define CHUNK_IS_ROOT 16
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/* This 'part' is a rootfs, allocate 'a' */
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# define CHUNK_ACTIVE 32
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/* This is the active slice in the MBR */
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void (*private_free)(void*);
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void *(*private_clone)(void*);
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void *private;
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/* For data private to the application, and the management
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* thereof. If the functions are not provided, no storage
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* management is done, Cloning will just copy the pointer
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* and freeing will just forget it.
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*/
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};
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struct disk *
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Open_Disk(char *devname);
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/* Will open the named disk, and return populated tree.
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*/
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struct disk *
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Clone_Disk(struct disk *disk);
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/* Clone a copy of a tree. Useful for "Undo" functionality
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*/
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void
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Free_Disk(struct disk *disk);
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/* Free a tree made with Open_Disk() or Clone_Disk()
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*/
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void
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Debug_Disk(struct disk *disk);
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/* Print the content of the tree to stdout
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*/
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#if 0
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struct disk *
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Set_Phys_Geom(struct disk *disk, u_long cyl, u_long heads, u_long sects);
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/* Use a different physical geometry. Makes sense for ST506 disks only.
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* The tree returned is read from the disk, using this geometry.
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*/
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#endif
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void
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Set_Bios_Geom(struct disk *disk, u_long cyl, u_long heads, u_long sects);
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/* Set the geometry the bios uses.
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*/
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int
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Delete_Chunk(struct disk *disk, struct chunk *);
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/* Free a chunk of disk_space
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*/
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void
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Collapse_Disk(struct disk *disk);
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/* Experimental, do not use.
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*/
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int
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Collapse_Chunk(struct disk *disk, struct chunk *chunk);
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/* Experimental, do not use.
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*/
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int
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Create_Chunk(struct disk *disk, u_long offset, u_long size, chunk_e type, int subtype, u_long flags);
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/* Create a chunk with the specified paramters
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*/
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void
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All_FreeBSD(struct disk *d);
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/* Make one FreeBSD chunk covering the entire disk
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*/
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char *
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CheckRules(struct disk *);
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/* Return char* to warnings about broken design rules in this disklayout
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*/
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char **
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Disk_Names();
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/* Return char** with all disk's names (wd0, wd1 ...). You must free
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* each pointer, as well as the array by hand
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*/
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void
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Set_Boot_Mgr(struct disk *d, u_char *bootmgr);
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/* Use this boot-manager on this disk. Gets written when Write_Disk()
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* is called
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*/
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void
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Set_Boot_Blocks(struct disk *d, u_char *boot1, u_char *boot2);
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/* Use these boot-blocks on this disk. Gets written when Write_Disk()
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* is called
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*/
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int
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Write_Disk(struct disk *d);
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/* Write all the MBRs, disklabels, bootblocks and boot managers
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*/
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int
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Cyl_Aligned(struct disk *d, u_long offset);
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/* Check if offset is aligned on a cylinder according to the
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* bios geometry
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*/
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u_long
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Next_Cyl_Aligned(struct disk *d, u_long offset);
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/* Round offset up to next cylinder according to the bios-geometry
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*/
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u_long
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Prev_Cyl_Aligned(struct disk *d, u_long offset);
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/* Round offset down to previous cylinder according to the bios-
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* geometry
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*/
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int
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Track_Aligned(struct disk *d, u_long offset);
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/* Check if offset is aligned on a track according to the
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* bios geometry
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*/
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u_long
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Next_Track_Aligned(struct disk *d, u_long offset);
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/* Round offset up to next track according to the bios-geometry
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*/
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u_long
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Prev_Track_Aligned(struct disk *d, u_long offset);
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/* Check if offset is aligned on a track according to the
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* bios geometry
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*/
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struct chunk *
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Create_Chunk_DWIM(struct disk *d, struct chunk *parent , u_long size, chunk_e type, int subtype, u_long flags);
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/* This one creates a partition inside the given parent of the given
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* size, and returns a pointer to it. The first unused chunk big
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* enough is used.
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*/
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void
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MakeDevDisk(struct disk *d,char *path);
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/* Make device nodes for all chunks on this disk */
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char *
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ShowChunkFlags(struct chunk *c);
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/* Return string to show flags. */
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char *
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ChunkCanBeRoot(struct chunk *c);
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/* Return NULL if chunk can be /, explanation otherwise */
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/*
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* Implementation details >>> DO NOT USE <<<
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*/
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void Debug_Chunk(struct chunk *);
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void Free_Chunk(struct chunk *);
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struct chunk * Clone_Chunk(struct chunk *);
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int Add_Chunk(struct disk *, long , u_long , char *, chunk_e, int , u_long);
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void Bios_Limit_Chunk(struct chunk *, u_long);
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void * read_block(int, daddr_t );
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void write_block(int fd, daddr_t block, void *foo);
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struct disklabel * read_disklabel(int, daddr_t);
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u_short dkcksum(struct disklabel *);
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struct chunk * Find_Mother_Chunk(struct chunk *, u_long , u_long , chunk_e);
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struct disk * Int_Open_Disk(char *name, u_long size);
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void Fixup_Names(struct disk *);
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#define dprintf printf
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/* TODO
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*
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* Need a error string mechanism from the functions instead of warn()
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*
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* Make sure only FreeBSD start at offset==0
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*
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* Collapse must align.
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*
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* Make Write_Disk(struct disk*)
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*
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* Consider booting from OnTrack'ed disks.
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*
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* Get Bios-geom, ST506 & OnTrack from driver (or otherwise)
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*
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* Make Create_DWIM().
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*
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* Make Is_Unchanged(struct disk *d1, struct chunk *c1)
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*
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* don't rename slices unless we have to
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*
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*Sample output from tst01:
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*
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* Debug_Disk(wd0) flags=0 real_geom=0/0/0 bios_geom=0/0/0
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* >> 0x3d040 0 1411200 1411199 wd0 0 whole 0 0
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* >>>> 0x3d080 0 960120 960119 wd0s1 3 freebsd 0 8
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* >>>>>> 0x3d100 0 40960 40959 wd0s1a 5 part 0 0
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* >>>>>> 0x3d180 40960 131072 172031 wd0s1b 5 part 0 0
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* >>>>>> 0x3d1c0 172032 409600 581631 wd0s1e 5 part 0 0
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* >>>>>> 0x3d200 581632 378488 960119 wd0s1f 5 part 0 0
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* >>>> 0x3d140 960120 5670 965789 wd0s2 4 extended 0 8
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* >>>>>> 0x3d2c0 960120 63 960182 - 6 unused 0 0
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* >>>>>> 0x3d0c0 960183 5607 965789 wd0s5 2 fat 0 8
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* >>>> 0x3d280 965790 1890 967679 wd0s3 1 foo -2 8
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* >>>> 0x3d300 967680 443520 1411199 wd0s4 3 freebsd 0 8
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* >>>>>> 0x3d340 967680 443520 1411199 wd0s4a 5 part 0 0
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*
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* ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
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* level chunkptr start size end name type subtype flags
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*
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* Underlying data structure:
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*
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* Legend:
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* <struct chunk> --> part
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* |
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* v next
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*
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* <wd0> --> <wd0s1> --> <wd0s1a>
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* | |
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* | v
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* | <wd0s1b>
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* | |
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* | v
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* | <wd0s1e>
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* | |
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* | v
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* | <wd0s1f>
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* |
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* v
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* <wd0s2> --> <unused>
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* | |
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* | v
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* | <wd0s5>
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* |
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* v
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* <wd0s3>
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* |
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* v
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* <wd0s4> --> <wd0s4a>
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*
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*
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*/
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