1 /*- 2 * ---------------------------------------------------------------------------- 3 * "THE BEER-WARE LICENSE" (Revision 42): 4 * <[email protected]> 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 * ---------------------------------------------------------------------------- 8 * 9 * $FreeBSD$ 10 * 11 */ 12 13 #ifndef _SYS_DISK_H_ 14 #define _SYS_DISK_H_ 15 16 #include <sys/ioccom.h> 17 #include <sys/types.h> 18 #include <sys/disk_zone.h> 19 20 #ifdef _KERNEL 21 22 #ifndef _SYS_CONF_H_ 23 #include <sys/conf.h> /* XXX: temporary to avoid breakage */ 24 #endif 25 26 void disk_err(struct bio *bp, const char *what, int blkdone, int nl); 27 28 #endif 29 30 #define DIOCGSECTORSIZE _IOR('d', 128, u_int) 31 /* 32 * Get the sector size of the device in bytes. The sector size is the 33 * smallest unit of data which can be transferred from this device. 34 * Usually this is a power of 2 but it might not be (i.e. CDROM audio). 35 */ 36 37 #define DIOCGMEDIASIZE _IOR('d', 129, off_t) /* Get media size in bytes */ 38 /* 39 * Get the size of the entire device in bytes. This should be a 40 * multiple of the sector size. 41 */ 42 43 #define DIOCGFWSECTORS _IOR('d', 130, u_int) /* Get firmware's sectorcount */ 44 /* 45 * Get the firmware's notion of number of sectors per track. This 46 * value is mostly used for compatibility with various ill designed 47 * disk label formats. Don't use it unless you have to. 48 */ 49 50 #define DIOCGFWHEADS _IOR('d', 131, u_int) /* Get firmware's headcount */ 51 /* 52 * Get the firmwares notion of number of heads per cylinder. This 53 * value is mostly used for compatibility with various ill designed 54 * disk label formats. Don't use it unless you have to. 55 */ 56 57 #define DIOCSKERNELDUMP _IOW('d', 133, u_int) /* Set/Clear kernel dumps */ 58 /* 59 * Enable/Disable (the argument is boolean) the device for kernel 60 * core dumps. 61 */ 62 63 #define DIOCGFRONTSTUFF _IOR('d', 134, off_t) 64 /* 65 * Many disk formats have some amount of space reserved at the 66 * start of the disk to hold bootblocks, various disklabels and 67 * similar stuff. This ioctl returns the number of such bytes 68 * which may apply to the device. 69 */ 70 71 #define DIOCGFLUSH _IO('d', 135) /* Flush write cache */ 72 /* 73 * Flush write cache of the device. 74 */ 75 76 #define DIOCGDELETE _IOW('d', 136, off_t[2]) /* Delete data */ 77 /* 78 * Mark data on the device as unused. 79 */ 80 81 #define DISK_IDENT_SIZE 256 82 #define DIOCGIDENT _IOR('d', 137, char[DISK_IDENT_SIZE]) 83 /*- 84 * Get the ident of the given provider. Ident is (most of the time) 85 * a uniqe and fixed provider's identifier. Ident's properties are as 86 * follow: 87 * - ident value is preserved between reboots, 88 * - provider can be detached/attached and ident is preserved, 89 * - provider's name can change - ident can't, 90 * - ident value should not be based on on-disk metadata; in other 91 * words copying whole data from one disk to another should not 92 * yield the same ident for the other disk, 93 * - there could be more than one provider with the same ident, but 94 * only if they point at exactly the same physical storage, this is 95 * the case for multipathing for example, 96 * - GEOM classes that consumes single providers and provide single 97 * providers, like geli, gbde, should just attach class name to the 98 * ident of the underlying provider, 99 * - ident is an ASCII string (is printable), 100 * - ident is optional and applications can't relay on its presence. 101 */ 102 103 #define DIOCGPROVIDERNAME _IOR('d', 138, char[MAXPATHLEN]) 104 /* 105 * Store the provider name, given a device path, in a buffer. The buffer 106 * must be at least MAXPATHLEN bytes long. 107 */ 108 109 #define DIOCGSTRIPESIZE _IOR('d', 139, off_t) /* Get stripe size in bytes */ 110 /* 111 * Get the size of the device's optimal access block in bytes. 112 * This should be a multiple of the sector size. 113 */ 114 115 #define DIOCGSTRIPEOFFSET _IOR('d', 140, off_t) /* Get stripe offset in bytes */ 116 /* 117 * Get the offset of the first device's optimal access block in bytes. 118 * This should be a multiple of the sector size. 119 */ 120 121 #define DIOCGPHYSPATH _IOR('d', 141, char[MAXPATHLEN]) 122 /* 123 * Get a string defining the physical path for a given provider. 124 * This has similar rules to ident, but is intended to uniquely 125 * identify the physical location of the device, not the current 126 * occupant of that location. 127 */ 128 129 struct diocgattr_arg { 130 char name[64]; 131 int len; 132 union { 133 char str[DISK_IDENT_SIZE]; 134 off_t off; 135 int i; 136 } value; 137 }; 138 #define DIOCGATTR _IOWR('d', 142, struct diocgattr_arg) 139 140 #define DIOCZONECMD _IOWR('d', 143, struct disk_zone_args) 141 142 #endif /* _SYS_DISK_H_ */ 143