1 /*- 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 * ---------------------------------------------------------------------------- 8 * 9 * $FreeBSD$ 10 * 11 */ 12 13 #ifndef _SYS_DISK_H_ 14 #define _SYS_DISK_H_ 15 16 #include <sys/ioccom.h> 17 18 #ifdef _KERNEL 19 20 #ifndef _SYS_CONF_H_ 21 #include <sys/conf.h> /* XXX: temporary to avoid breakage */ 22 #endif 23 24 void disk_err(struct bio *bp, const char *what, int blkdone, int nl); 25 26 #endif 27 28 #define DIOCGSECTORSIZE _IOR('d', 128, u_int) 29 /* 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). 33 */ 34 35 #define DIOCGMEDIASIZE _IOR('d', 129, off_t) /* Get media size in bytes */ 36 /* 37 * Get the size of the entire device in bytes. This should be a 38 * multiple of the sector size. 39 */ 40 41 #define DIOCGFWSECTORS _IOR('d', 130, u_int) /* Get firmware's sectorcount */ 42 /* 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. 46 */ 47 48 #define DIOCGFWHEADS _IOR('d', 131, u_int) /* Get firmware's headcount */ 49 /* 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. 53 */ 54 55 #define DIOCSKERNELDUMP _IOW('d', 133, u_int) /* Set/Clear kernel dumps */ 56 /* 57 * Enable/Disable (the argument is boolean) the device for kernel 58 * core dumps. 59 */ 60 61 #define DIOCGFRONTSTUFF _IOR('d', 134, off_t) 62 /* 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. 67 */ 68 69 #define DIOCGFLUSH _IO('d', 135) /* Flush write cache */ 70 /* 71 * Flush write cache of the device. 72 */ 73 74 #define DIOCGDELETE _IOW('d', 136, off_t[2]) /* Delete data */ 75 /* 76 * Mark data on the device as unused. 77 */ 78 79 #define DISK_IDENT_SIZE 256 80 #define DIOCGIDENT _IOR('d', 137, char[DISK_IDENT_SIZE]) 81 /*- 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 84 * follow: 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. 99 */ 100 101 #define DIOCGPROVIDERNAME _IOR('d', 138, char[MAXPATHLEN]) 102 /* 103 * Store the provider name, given a device path, in a buffer. The buffer 104 * must be at least MAXPATHLEN bytes long. 105 */ 106 107 #define DIOCGSTRIPESIZE _IOR('d', 139, off_t) /* Get stripe size in bytes */ 108 /* 109 * Get the size of the device's optimal access block in bytes. 110 * This should be a multiple of the sector size. 111 */ 112 113 #define DIOCGSTRIPEOFFSET _IOR('d', 140, off_t) /* Get stripe offset in bytes */ 114 /* 115 * Get the offset of the first device's optimal access block in bytes. 116 * This should be a multiple of the sector size. 117 */ 118 119 #endif /* _SYS_DISK_H_ */ 120