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freebsd-dev/lib/libdisk/libdisk.h
Jordan K. Hubbard 96e426f43d + add u_long sector_size to struct disk (documented in libdisk.3) 
+ make Open_Disk sense the sector size by trying 512, 1024 and 2048
  in this order. This makes the kernel note that
  dscheck(cd1): bio_bcount 512 is not on a sector boundary (ssize 2048)
  dscheck(cd1): bio_bcount 1024 is not on a sector boundary (ssize 2048)
  if 2048 is the sector size. If this worries anyone: the message is from
  /usr/src/sys/kern/subr_diskslice.c and shutups are to be placed there.
+ Have read_block and write_block use an additional parameter, the
  sector size.
+ replace all barfout calls with return NULL, 0, __LINE__, etc.
  Note that this does NOT emit diagnostics. More often than not,
  you don't want library functions to scribble on stderr -- it may
  not even be available. The right thing is to propagate the error
  condition to upper management. The app should take care of errors.
+ use d1->sector_size instead of 512 in various places. I've left many
  places untouched, especially those writing MBRs. I simply added
  another arg hardcoded as 512. This is because I would not know what
  I'm doing... I felt this approach would be reasonably backward
  compatible and not introduce any new bugs in critical software.
  Famous last words. Messing with MBRs might soon put me in the same
  screwup meister category as, uh, never mind.  :-)
+ bump the max no of disks from 20 to 32 (due to PR 24503).

PR:		8434 / 8436 / 24503
Submitted by:	Jens Schweikhardt <schweikh@schweikhardt.net>
2001-05-13 20:08:54 +00:00

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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@login.dknet.dk> 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
* ----------------------------------------------------------------------------
*
* $FreeBSD$
*
*/
#define MAX_NO_DISKS 32
/* Max # of disks Disk_Names() will return */
#define MAX_SEC_SIZE 2048 /* maximum sector size that is supported */
#define MIN_SEC_SIZE 512 /* the sector size to end sensing at */
typedef enum {
whole,
unknown,
fat,
freebsd,
extended,
part,
unused
} chunk_e;
__BEGIN_DECLS
struct disk {
char *name;
u_long flags;
# define DISK_ON_TRACK 1
u_long bios_cyl;
u_long bios_hd;
u_long bios_sect;
#ifdef PC98
u_char *bootipl;
size_t bootipl_size;
u_char *bootmenu;
size_t bootmenu_size;
#else
u_char *bootmgr;
size_t bootmgr_size;
#endif
u_char *boot1;
#if defined(__i386__) /* the i386 needs extra help... */
u_char *boot2;
#endif
struct chunk *chunks;
u_long sector_size; /* media sector size, a power of 2 */
};
struct chunk {
struct chunk *next;
struct chunk *part;
struct disk *disk;
long offset;
u_long size;
u_long end;
#ifdef PC98
char *sname;
#endif
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_BSD_COMPAT 2
/* this chunk is in the BSD-compatibility, and has a
* short name too, ie wd0s4f -> wd0f
*/
# 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 */
# define CHUNK_FORCE_ALL 64
/* Force a dedicated disk for FreeBSD, bypassing
* all BIOS geometry considerations
*/
void (*private_free)(void*);
void *(*private_clone)(void*);
void *private_data;
/* 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.
*/
};
extern const char *chunk_n[];
const char *
slice_type_name( int type, int subtype );
/* "chunk_n" for subtypes too
*/
struct disk *
Open_Disk(const 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
*/
void
Set_Bios_Geom(struct disk *disk, u_long cyl, u_long heads, u_long sects);
/* Set the geometry the bios uses.
*/
void
Sanitize_Bios_Geom(struct disk *disk);
/* Set the bios geometry to something sane
*/
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
#ifdef PC98
Create_Chunk(struct disk *disk, u_long offset, u_long size, chunk_e type,
int subtype, u_long flags, const char *);
#else
Create_Chunk(struct disk *disk, u_long offset, u_long size, chunk_e type,
int subtype, u_long flags);
#endif
/* Create a chunk with the specified paramters
*/
void
All_FreeBSD(struct disk *d, int force_all);
/* Make one FreeBSD chunk covering the entire disk;
* if force_all is set, bypass all BIOS geometry
* considerations.
*/
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
*/
#ifdef PC98
void
Set_Boot_Mgr(struct disk *d, const u_char *bootipl, const size_t bootipl_size,
const u_char *bootmenu, const size_t bootmenu_size);
#else
void
Set_Boot_Mgr(struct disk *d, const u_char *bootmgr, const size_t bootmgr_size);
#endif
/* Use this boot-manager on this disk. Gets written when Write_Disk()
* is called
*/
int
Set_Boot_Blocks(struct disk *d, const u_char *_boot1, const u_char *_boot2);
/* Use these boot-blocks on this disk. Gets written when Write_Disk()
* is called. Returns nonzero upon failure.
*/
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.
*/
int
MakeDev(struct chunk *c, const char *path);
int
MakeDevDisk(struct disk *d, const char *path);
/* Make device nodes for all chunks on this disk */
char *
ShowChunkFlags(struct chunk *c);
/* Return string to show flags. */
char *
ChunkCanBeRoot(struct chunk *c);
/* Return NULL if chunk can be /, explanation otherwise */
/*
* Implementation details >>> DO NOT USE <<<
*/
void Debug_Chunk(struct chunk *);
void Free_Chunk(struct chunk *);
struct chunk * Clone_Chunk(struct chunk *);
#ifdef PC98
int Add_Chunk(struct disk *, long, u_long, const char *, chunk_e, int, u_long, const char *);
#else
int Add_Chunk(struct disk *, long, u_long, const char *, chunk_e, int, u_long);
#endif
void * read_block(int, daddr_t, u_long);
int write_block(int, daddr_t, void *, u_long);
struct disklabel * read_disklabel(int, daddr_t, u_long);
struct chunk * Find_Mother_Chunk(struct chunk *, u_long, u_long, chunk_e);
struct disk * Int_Open_Disk(const char *name, u_long size);
int Fixup_Names(struct disk *);
__END_DECLS
#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 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:
* <struct chunk> --> part
* |
* v next
*
* <wd0> --> <wd0s1> --> <wd0s1a>
* | |
* | v
* | <wd0s1b>
* | |
* | v
* | <wd0s1e>
* | |
* | v
* | <wd0s1f>
* |
* v
* <wd0s2> --> <unused>
* | |
* | v
* | <wd0s5>
* |
* v
* <wd0s3>
* |
* v
* <wd0s4> --> <wd0s4a>
*
*
*/
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