2 * ----------------------------------------------------------------------------
3 * "THE BEER-WARE LICENSE" (Revision 42):
4 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
5 * can do whatever you want with this stuff. If we meet some day, and you think
6 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
7 * ----------------------------------------------------------------------------
16 #include <sys/ioccom.h>
21 #include <sys/conf.h> /* XXX: temporary to avoid breakage */
24 void disk_err(struct bio *bp, const char *what, int blkdone, int nl);
28 #define DIOCGSECTORSIZE _IOR('d', 128, u_int)
30 * Get the sector size of the device in bytes. The sector size is the
31 * smallest unit of data which can be transferred from this device.
32 * Usually this is a power of 2 but it might not be (i.e. CDROM audio).
35 #define DIOCGMEDIASIZE _IOR('d', 129, off_t) /* Get media size in bytes */
37 * Get the size of the entire device in bytes. This should be a
38 * multiple of the sector size.
41 #define DIOCGFWSECTORS _IOR('d', 130, u_int) /* Get firmware's sectorcount */
43 * Get the firmware's notion of number of sectors per track. This
44 * value is mostly used for compatibility with various ill designed
45 * disk label formats. Don't use it unless you have to.
48 #define DIOCGFWHEADS _IOR('d', 131, u_int) /* Get firmware's headcount */
50 * Get the firmwares notion of number of heads per cylinder. This
51 * value is mostly used for compatibility with various ill designed
52 * disk label formats. Don't use it unless you have to.
55 #define DIOCSKERNELDUMP _IOW('d', 133, u_int) /* Set/Clear kernel dumps */
57 * Enable/Disable (the argument is boolean) the device for kernel
61 #define DIOCGFRONTSTUFF _IOR('d', 134, off_t)
63 * Many disk formats have some amount of space reserved at the
64 * start of the disk to hold bootblocks, various disklabels and
65 * similar stuff. This ioctl returns the number of such bytes
66 * which may apply to the device.
69 #define DIOCGFLUSH _IO('d', 135) /* Flush write cache */
71 * Flush write cache of the device.
74 #define DIOCGDELETE _IOW('d', 136, off_t[2]) /* Delete data */
76 * Mark data on the device as unused.
79 #define DISK_IDENT_SIZE 256
80 #define DIOCGIDENT _IOR('d', 137, char[DISK_IDENT_SIZE])
82 * Get the ident of the given provider. Ident is (most of the time)
83 * a uniqe and fixed provider's identifier. Ident's properties are as
85 * - ident value is preserved between reboots,
86 * - provider can be detached/attached and ident is preserved,
87 * - provider's name can change - ident can't,
88 * - ident value should not be based on on-disk metadata; in other
89 * words copying whole data from one disk to another should not
90 * yield the same ident for the other disk,
91 * - there could be more than one provider with the same ident, but
92 * only if they point at exactly the same physical storage, this is
93 * the case for multipathing for example,
94 * - GEOM classes that consumes single providers and provide single
95 * providers, like geli, gbde, should just attach class name to the
96 * ident of the underlying provider,
97 * - ident is an ASCII string (is printable),
98 * - ident is optional and applications can't relay on its presence.
101 #define DIOCGPROVIDERNAME _IOR('d', 138, char[MAXPATHLEN])
103 * Store the provider name, given a device path, in a buffer. The buffer
104 * must be at least MAXPATHLEN bytes long.
107 #define DIOCGSTRIPESIZE _IOR('d', 139, off_t) /* Get stripe size in bytes */
109 * Get the size of the device's optimal access block in bytes.
110 * This should be a multiple of the sector size.
113 #define DIOCGSTRIPEOFFSET _IOR('d', 140, off_t) /* Get stripe offset in bytes */
115 * Get the offset of the first device's optimal access block in bytes.
116 * This should be a multiple of the sector size.
119 #define DIOCGPHYSPATH _IOR('d', 141, char[MAXPATHLEN])
121 * Get a string defining the physical path for a given provider.
122 * This has similar rules to ident, but is intended to uniquely
123 * identify the physical location of the device, not the current
124 * occupant of that location.
127 #endif /* _SYS_DISK_H_ */