120 lines
4.0 KiB
C
120 lines
4.0 KiB
C
/*-
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.ORG> 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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* $FreeBSD$
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*
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*/
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#ifndef _SYS_DISK_H_
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#define _SYS_DISK_H_
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#include <sys/ioccom.h>
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#ifdef _KERNEL
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#ifndef _SYS_CONF_H_
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#include <sys/conf.h> /* XXX: temporary to avoid breakage */
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#endif
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void disk_err(struct bio *bp, const char *what, int blkdone, int nl);
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#endif
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#define DIOCGSECTORSIZE _IOR('d', 128, u_int)
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/*
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* Get the sector size of the device in bytes. The sector size is the
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* smallest unit of data which can be transferred from this device.
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* Usually this is a power of 2 but it might not be (i.e. CDROM audio).
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*/
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#define DIOCGMEDIASIZE _IOR('d', 129, off_t) /* Get media size in bytes */
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/*
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* Get the size of the entire device in bytes. This should be a
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* multiple of the sector size.
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*/
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#define DIOCGFWSECTORS _IOR('d', 130, u_int) /* Get firmware's sectorcount */
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/*
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* Get the firmware's notion of number of sectors per track. This
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* value is mostly used for compatibility with various ill designed
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* disk label formats. Don't use it unless you have to.
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*/
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#define DIOCGFWHEADS _IOR('d', 131, u_int) /* Get firmware's headcount */
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/*
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* Get the firmwares notion of number of heads per cylinder. This
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* value is mostly used for compatibility with various ill designed
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* disk label formats. Don't use it unless you have to.
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*/
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#define DIOCSKERNELDUMP _IOW('d', 133, u_int) /* Set/Clear kernel dumps */
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/*
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* Enable/Disable (the argument is boolean) the device for kernel
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* core dumps.
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*/
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#define DIOCGFRONTSTUFF _IOR('d', 134, off_t)
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/*
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* Many disk formats have some amount of space reserved at the
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* start of the disk to hold bootblocks, various disklabels and
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* similar stuff. This ioctl returns the number of such bytes
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* which may apply to the device.
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*/
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#define DIOCGFLUSH _IO('d', 135) /* Flush write cache */
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/*
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* Flush write cache of the device.
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*/
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#define DIOCGDELETE _IOW('d', 136, off_t[2]) /* Delete data */
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/*
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* Mark data on the device as unused.
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*/
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#define DISK_IDENT_SIZE 256
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#define DIOCGIDENT _IOR('d', 137, char[DISK_IDENT_SIZE])
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/*-
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* Get the ident of the given provider. Ident is (most of the time)
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* a uniqe and fixed provider's identifier. Ident's properties are as
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* follow:
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* - ident value is preserved between reboots,
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* - provider can be detached/attached and ident is preserved,
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* - provider's name can change - ident can't,
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* - ident value should not be based on on-disk metadata; in other
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* words copying whole data from one disk to another should not
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* yield the same ident for the other disk,
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* - there could be more than one provider with the same ident, but
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* only if they point at exactly the same physical storage, this is
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* the case for multipathing for example,
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* - GEOM classes that consumes single providers and provide single
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* providers, like geli, gbde, should just attach class name to the
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* ident of the underlying provider,
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* - ident is an ASCII string (is printable),
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* - ident is optional and applications can't relay on its presence.
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*/
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#define DIOCGPROVIDERNAME _IOR('d', 138, char[MAXPATHLEN])
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/*
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* Store the provider name, given a device path, in a buffer. The buffer
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* must be at least MAXPATHLEN bytes long.
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*/
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#define DIOCGSTRIPESIZE _IOR('d', 139, off_t) /* Get stripe size in bytes */
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/*
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* Get the size of the device's optimal access block in bytes.
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* This should be a multiple of the sector size.
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*/
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#define DIOCGSTRIPEOFFSET _IOR('d', 140, off_t) /* Get stripe offset in bytes */
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/*
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* Get the offset of the first device's optimal access block in bytes.
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* This should be a multiple of the sector size.
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*/
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#endif /* _SYS_DISK_H_ */
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