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NAME
- dkio - disk control operations
SYNOPSIS
-
#include <sys/dkio.h>
-
#include <sys/vtoc.h>
DESCRIPTION
- Disk drivers support a set of ioctl(2) requests for disk controller, geometry, and partition information. Basic to these ioctl( ) requests are the definitions in <sys/dkio.h>.
IOCTLS
- The following ioctl( ) requests set and/or retrieve the current disk controller, partitions, or geometry information:
-
-
DKIOCINFO
- The argument is a pointer to a dk_cinfo structure (described below). This structure tells the type of the controller and attributes about how bad-block processing is done on the controller.
-
/*
-
-
* Structures and definitions for disk I/O control commands
* /
-
-
#define DK_DEVLEN
-
16
-
/* device name max length, * /
-
-
/* including unit # and NULL * /
-
/*
-
-
* Used for controller info
* /
-
struct dk_cinfo {
-
-
char dki_cname[DK_DEVLEN ]; /* controller name (no unit #)* /
u_short dki_ctype; /* controller type * /
u_short dki_flags; /* flags * /
u_short dki_cnum; /* controller number * /
u_int dki_addr; /* controller address * /
u_int dki_space; /* controller bus type * /
u_int dki_prio; /* interrupt priority * /
u_int dki_vec; /* interrupt vector * /
char dki_dname[DK_DEVLEN ]; /* drive name (no unit #) * /
u_int dki_unit; /* unit number * /
u_int dki_slave; /* slave number * /
u_short dki_partition; /* partition number * /
u_short dki_maxtransfer; /* maximum transfer size * /
/* in DEV_BSIZE * /
};
-
/*
-
-
* Controller types
* /
-
-
#define DKC_UNKNOWN
-
0
-
-
#define DKC_CDROM 1 /* CD-ROM, SCSI or
otherwise * /
-
-
#define DKC_WDC2880 2
#define DKC_XXX_0 3 /* unassigned * /
#define DKC_XXX_1 4 /* unassigned * /
#define DKC_DSD5215 5
#define DKC_XY450 6
#define DKC_ACB4000 7
#define DKC_MD21 8
#define DKC_XXX_2 9 /* unassigned * /
#define DKC_NCRFLOPPY 10
#define DKC_XD7053 11
#define DKC_SMSFLOPPY 12
#define DKC_SCSI_CCS 13 /* SCSI CCS compatible * /
#define DKC_INTEL82072 14 /* native floppy chip * /
#define DKC_PANTHER 15
#define DKC_SUN_IPI1 DKC_PANTHER /* Sun Panther * /
/* VME/IPI controller * /
#define DKC_MD 16 /* meta-disk (virtual-disk) * /
/* driver * /
#define DKC_CDC_9057 17 /* CDC 9057-321 (CM-3) * /
/* IPI String Controller * /
#define DKC_FJ_M1060 18 /* Fujitsu/Intellistor * /
/* IM1060 PI-3 SC * /
#define DKC_INTEL82077 19 /* 82077 floppy disk * /
/* controller * /
#define DKC_DIRECT 20 /* Intel direct attached * /
/* device (IDE) * /
-
/*
-
-
* Sun reserves up through 1023
* /
#define DKC_CUSTOMER_BASE 1024
-
/*
- * Flags
- * /
-
-
#define DKI_BAD144 0x01 /* use DEC std 144 bad sector fwding * /
#define DKI_MAPTRK 0x02 /* controller does track mapping * /
#define DKI_FMTTRK 0x04 /* formats only full track at a time * /
#define DKI_FMTVOL 0x08 /* formats only full volume at a time * /
#define DKI_FMTCYL 0x10 /* formats only full cylinders at a time* /
#define DKI_HEXUNIT 0x20 /* unit number printed as 3 hex digits * /
-
-
DKIOCGAPART The argument is a pointer to a dk_allmap structure (described below).
- This ioctl( ) gets the controller's notion of the current partition table for disk drive.
-
-
DKIOCSAPART The argument is a pointer to a dk_allmap structure (described below).
- This ioctl( ) sets the controller's notion of the partition table without changing the disk itself.
-
/*
-
-
* Partition map (part of dk_label)
* /
-
struct dk_map {
-
-
daddr_t dkl_cylno; /* starting cylinder * /
daddr_t dkl_nblk; /* number of blocks * /
};
-
/*
-
-
* Used for all partitions
* /
-
struct dk_allmap {
-
-
struct dk_map dka_map[NDKMAP ];
};
-
-
DKIOCPARTINFO
- x86: The argument is a pointer to a part_info structure (described below). This ioctl( ) gets the driver's notion of the size and extent of the partition or slice indicated by the file descriptor argument.
-
/*
-
-
* Used by applications to get partition or slice information
* /
-
struct part_info {
-
-
daddr_t p_start;
int p_length;
};
-
-
DKIOCGGEOM The argument is a pointer to a dk_geom structure (described below).
- This ioctl( ) gets the controller's notion of the current geometry of the disk drive.
-
-
DKIOCSGEOM
- The argument is a pointer to a dk_geom structure (described below). This ioctl( ) sets the controller's notion of the geometry without changing the disk itself.
-
-
DKIOCG_PHYGEOM
x86: The argument is a pointer to a dk_geom structure (described
below). This ioctl( ) gets the driver's notion of the physical geometry of
the disk drive. It is functionally identical to the DKIOCGGEOM ioctl( ).
-
-
DKIOCG_VIRTGEOM
- x86: The argument is a pointer to a dk_geom structure (described below). This ioctl( ) gets the controller's (and hence the driver's) notion of the virtual geometry of the disk drive. Virtual geometry is a view of
- the disk geometry maintained by the firmware in a host bus adapter or disk controller.
-
/*
-
-
* Definition of a disk's geometry
* /
-
struct dk_geom {
-
-
unsigned short dkg_ncyl; /* # of data * /
/* cylinders * /
unsigned short dkg_acyl; /* # of alternate* /
/* cylinders * /
unsigned short dkg_bcyl; /* cyl offset (for * /
/* fixed head area) * /
unsigned short dkg_nhead; /* # of heads * /
unsigned short dkg_obs1; /* obsolete * /
unsigned short dkg_nsect; /* # of sectors * /
/* per track * /
unsigned short dkg_intrlv; /* interleave factor * /
unsigned short dkg_obs2; /* obsolete * /
unsigned short dkg_obs3; /* obsolete * /
unsigned short dkg_apc; /* alternates per * /
/* cyl (SCSI only) * /
unsigned short dkg_rpm; /* revolutions per min* /
unsigned short dkg_pcyl; /* # of physical * /
/* cylinders * /
unsigned short dkg_write_reinstruct; /* # sectors to * /
/* skip, writes * /
unsigned short dkg_read_reinstruct; /* # sectors to * /
/* skip, reads * /
unsigned short dkg_extra[7]; /* for compatible* /
/* expansion * /
};
-
-
#define dkg_gap1
-
dkg_extra[0]
-
/* for application * /
-
-
/* compatibility * /
#define dkg_gap2 dkg_extra[1] /* for application * /
/* compatibility * /
-
-
DKIOCGVTOC
- The argument is a pointer to a vtoc structure (described below). This ioctl( ) returns the device's current VTOC (volume table of contents).
-
-
DKIOCSVTOC
- The argument is a pointer to a vtoc structure (described below). This ioctl( ) changes the VTOC associated with the device.
-
-
struct partition {
ushort p_tag; /* ID tag of partition * /
ushort p_flag; /* permission flags * /
daddr_t p_start; /* start sector of partition * /
long p_size; /* # of blocks in partition * /
};
- If DKIOCSVTOC is used with a floppy diskette, the p_start field must be the first sector of a cylinder. Multiply the number of heads by the number of sectors per track to compute the number of sectors per cylinder.
-
-
struct vtoc {
unsigned long v_bootinfo[3]; /* info needed * /
/* by mboot * /
/* (unsupported) * /
unsigned long v_sanity; /* to verify vtoc * /
/* sanity * /
unsigned long v_version; /* layout version * /
char v_volume[LEN_DKL_VVOL ]; /* volume name * /
ushort v_sectorsz; /* sector size in * /
/* bytes * /
ushort v_nparts; /* number of * /
/* partitions * /
unsigned long v_reserved[10]; /* free space * /
struct partition v_part[V_NUMPAR ]; /* partition * /
/* headers* /
time_t timestamp[V_NUMPAR ]; /* partition * /
/* timestamp * /
/* (unsupported) * /
char v_asciilabel[LEN_DKL_ASCII ]; /* compatibility * /
};
-
/*
-
-
* Partition permission flags
* /
-
-
#define V_UNMNT
-
0x01
-
/* Unmountable partition * /
-
-
#define V_RONLY 0x10 /* Read only * /
-
/*
-
-
* Partition identification tags
* /
-
-
#define V_UNASSIGNED
-
0x00
-
/* unassigned partition * /
-
-
#define V_BOOT 0x01 /* Boot partition * /
#define V_ROOT 0x02 /* Root filesystem * /
#define V_SWAP 0x03 /* Swap filesystem * /
-
-
#define V_USR 0x04 /* Usr filesystem * /
#define V_BACKUP 0x05 /* full disk * /
#define V_STAND 0x06 /* Stand partition * /
#define V_VAR 0x07 /* Var partition * /
#define V_HOME 0x08 /* Home partition * /
#define V_ALTSCTR 0x09 /* Alternate sector partition * /
-
-
DKIOCADDBAD
- x86: This ioctl( ) forces the driver to re-examine the alternates slice and rebuild the internal bad block map accordingly. It should be used whenever the alternates slice is changed by any method other than the addbadsec(1M) utility.
-
-
DKIOCEJECT
- This ioctl( ) requests the disk drive to eject its disk, if that drive supports removable media.
-
-
DKIOCLOCK
- SPARC: This ioctl( ) requests the disk drive to lock the door, for those devices with removable media.
-
-
DKIOCUNLOCK
- SPARC: This ioctl( ) requests the disk drive to unlock the door, for those devices with removable media.
-
-
DKIOCSTATE
- SPARC: This ioctl( ) blocks until the state of the drive, inserted or ejected, is changed. The argument is a pointer to a dkio_state, enum, whose possible enumerations are listed below. The initial value should be either the last reported state of the drive, or DKIO_NONE . Upon return, the enum pointed to by the argument is updated with the current state of the drive.
-
-
enum dkio_state {
DKIO_NONE , /* Return disk's current state * /
DKIO_EJECTED , /* Disk state is 'ejected' * /
DKIO_INSERTED /* Disk state is 'inserted' * /
};
SEE ALSO
-
ioctl(2), cdio(7), fdio(7)
SPARC Only x86 Only
-
hdio(7), ipi(7), sd(7), xd(7), xy(7)
-
cmdk(7)
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