/* * ---------------------------------------------------------------------------- * "THE BEER-WARE LICENSE" (Revision 42): * wrote this file. As long as you retain this notice you * can do whatever you want with this stuff. If we meet some day, and you think * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp * ---------------------------------------------------------------------------- * * $Id: libdisk.h,v 1.15 1995/05/10 05:57:03 phk Exp $ * */ #define MAX_NO_DISKS 20 /* Max # of disks Disk_Names() will return */ typedef enum { whole, unknown, fat, freebsd, extended, part, unused, } chunk_e; extern char *chunk_n[]; struct disk { char *name; u_long flags; # define DISK_ON_TRACK 1 u_long real_cyl; u_long real_hd; u_long real_sect; u_long bios_cyl; u_long bios_hd; u_long bios_sect; u_char *bootmgr; u_char *boot1; u_char *boot2; struct chunk *chunks; }; struct chunk { struct chunk *next; struct chunk *part; long offset; u_long size; u_long end; char *name; char *oname; /* Used during Fixup_Names() to avoid renaming more than * absolutely needed. */ chunk_e type; int subtype; u_long flags; # define CHUNK_PAST_1024 1 /* this chunk cannot be booted from because it * extends past cylinder 1024 */ # define CHUNK_BSD_COMPAT 2 /* this chunk is in the BSD-compatibility, and has a * short name too, ie wd0s4f -> wd0f */ # define CHUNK_BAD144 4 /* this chunk has bad144 mapping */ # define CHUNK_ALIGN 8 /* This chunk should be aligned */ # define CHUNK_IS_ROOT 16 /* This 'part' is a rootfs, allocate 'a' */ # define CHUNK_ACTIVE 32 /* This is the active slice in the MBR */ void (*private_free)(void*); void *(*private_clone)(void*); void *private; /* For data private to the application, and the management * thereof. If the functions are not provided, no storage * management is done, Cloning will just copy the pointer * and freeing will just forget it. */ }; struct disk * Open_Disk(char *devname); /* Will open the named disk, and return populated tree. */ struct disk * Clone_Disk(struct disk *disk); /* Clone a copy of a tree. Useful for "Undo" functionality */ void Free_Disk(struct disk *disk); /* Free a tree made with Open_Disk() or Clone_Disk() */ void Debug_Disk(struct disk *disk); /* Print the content of the tree to stdout */ struct disk * Set_Phys_Geom(struct disk *disk, u_long cyl, u_long heads, u_long sects); /* Use a different physical geometry. Makes sense for ST506 disks only. * The tree returned is read from the disk, using this geometry. */ void Set_Bios_Geom(struct disk *disk, u_long cyl, u_long heads, u_long sects); /* Set the geometry the bios uses. */ int Delete_Chunk(struct disk *disk, struct chunk *); /* Free a chunk of disk_space */ void Collapse_Disk(struct disk *disk); /* Experimental, do not use. */ int Collapse_Chunk(struct disk *disk, struct chunk *chunk); /* Experimental, do not use. */ int Create_Chunk(struct disk *disk, u_long offset, u_long size, chunk_e type, int subtype, u_long flags); /* Create a chunk with the specified paramters */ void All_FreeBSD(struct disk *d); /* Make one FreeBSD chunk covering the entire disk */ char * CheckRules(struct disk *); /* Return char* to warnings about broken design rules in this disklayout */ char ** Disk_Names(); /* Return char** with all disk's names (wd0, wd1 ...). You must free * each pointer, as well as the array by hand */ void Set_Boot_Mgr(struct disk *d, u_char *bootmgr); /* Use this boot-manager on this disk. Gets written when Write_Disk() * is called */ void Set_Boot_Blocks(struct disk *d, u_char *boot1, u_char *boot2); /* Use these boot-blocks on this disk. Gets written when Write_Disk() * is called */ int Write_Disk(struct disk *d); /* Write all the MBRs, disklabels, bootblocks and boot managers */ int Cyl_Aligned(struct disk *d, u_long offset); /* Check if offset is aligned on a cylinder according to the * bios geometry */ u_long Next_Cyl_Aligned(struct disk *d, u_long offset); /* Round offset up to next cylinder according to the bios-geometry */ u_long Prev_Cyl_Aligned(struct disk *d, u_long offset); /* Round offset down to previous cylinder according to the bios- * geometry */ int Track_Aligned(struct disk *d, u_long offset); /* Check if offset is aligned on a track according to the * bios geometry */ u_long Next_Track_Aligned(struct disk *d, u_long offset); /* Round offset up to next track according to the bios-geometry */ u_long Prev_Track_Aligned(struct disk *d, u_long offset); /* Check if offset is aligned on a track according to the * bios geometry */ struct chunk * Create_Chunk_DWIM(struct disk *d, struct chunk *parent , u_long size, chunk_e type, int subtype, u_long flags); /* This one creates a partition inside the given parent of the given * size, and returns a pointer to it. The first unused chunk big * enough is used. */ /* * Implementation details >>> DO NOT USE <<< */ void Debug_Chunk(struct chunk *); void Free_Chunk(struct chunk *); struct chunk * Clone_Chunk(struct chunk *); int Add_Chunk(struct disk *, long , u_long , char *, chunk_e, int , u_long); void Bios_Limit_Chunk(struct chunk *, u_long); void * read_block(int, daddr_t ); void write_block(int fd, daddr_t block, void *foo); struct disklabel * read_disklabel(int, daddr_t); u_short dkcksum(struct disklabel *); struct chunk * Find_Mother_Chunk(struct chunk *, u_long , u_long , chunk_e); struct disk * Int_Open_Disk(char *name, u_long size); void Fixup_Names(struct disk *); #define dprintf printf /* TODO * * Need a error string mechanism from the functions instead of warn() * * Make sure only FreeBSD start at offset==0 * * Collapse must align. * * Make Write_Disk(struct disk*) * * Consider booting from OnTrack'ed disks. * * Get Bios-geom, ST506 & OnTrack from driver (or otherwise) * * Make Create_DWIM(). * * Make Is_Unchanged(struct disk *d1, struct chunk *c1) * * don't rename slices unless we have to * *Sample output from tst01: * * Debug_Disk(wd0) flags=0 real_geom=0/0/0 bios_geom=0/0/0 * >> 0x3d040 0 1411200 1411199 wd0 0 whole 0 0 * >>>> 0x3d080 0 960120 960119 wd0s1 3 freebsd 0 8 * >>>>>> 0x3d100 0 40960 40959 wd0s1a 5 part 0 0 * >>>>>> 0x3d180 40960 131072 172031 wd0s1b 5 part 0 0 * >>>>>> 0x3d1c0 172032 409600 581631 wd0s1e 5 part 0 0 * >>>>>> 0x3d200 581632 378488 960119 wd0s1f 5 part 0 0 * >>>> 0x3d140 960120 5670 965789 wd0s2 4 extended 0 8 * >>>>>> 0x3d2c0 960120 63 960182 - 6 unused 0 0 * >>>>>> 0x3d0c0 960183 5607 965789 wd0s5 2 fat 0 8 * >>>> 0x3d280 965790 1890 967679 wd0s3 1 foo -2 8 * >>>> 0x3d300 967680 443520 1411199 wd0s4 3 freebsd 0 8 * >>>>>> 0x3d340 967680 443520 1411199 wd0s4a 5 part 0 0 * * ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ * level chunkptr start size end name type subtype flags * * Underlying data structure: * * Legend: * --> part * | * v next * * --> --> * | | * | v * | * | | * | v * | * | | * | v * | * | * v * --> * | | * | v * | * | * v * * | * v * --> * * */