The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/disk.h

Version: -  FREEBSD  -  FREEBSD11  -  FREEBSD10  -  FREEBSD9  -  FREEBSD92  -  FREEBSD91  -  FREEBSD90  -  FREEBSD8  -  FREEBSD82  -  FREEBSD81  -  FREEBSD80  -  FREEBSD7  -  FREEBSD74  -  FREEBSD73  -  FREEBSD72  -  FREEBSD71  -  FREEBSD70  -  FREEBSD6  -  FREEBSD64  -  FREEBSD63  -  FREEBSD62  -  FREEBSD61  -  FREEBSD60  -  FREEBSD5  -  FREEBSD55  -  FREEBSD54  -  FREEBSD53  -  FREEBSD52  -  FREEBSD51  -  FREEBSD50  -  FREEBSD4  -  FREEBSD3  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    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: head/sys/sys/disk.h 300207 2016-05-19 14:08:36Z ken $
   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_ */

Cache object: 8a68b27e8ba17a7af54517dcb124af0e


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.