diff options
Diffstat (limited to 'sys/include')
| -rw-r--r-- | sys/include/sys/disk.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sys/include/sys/disk.h b/sys/include/sys/disk.h index f6ed126..e503e21 100644 --- a/sys/include/sys/disk.h +++ b/sys/include/sys/disk.h @@ -33,9 +33,33 @@ #include <sys/syscall.h> #include <sys/queue.h> #include <sys/device.h> +#include <sys/cdefs.h> #include <sys/types.h> #include <sys/limits.h> #include <sys/cdefs.h> +#if defined(_KERNEL) +#include <dev/dcdr/cache.h> +#endif /* _KERNEL */ + +/* + * V_BSIZE is the virtual block size in bytes used + * by the disk framework. The virtual block size is a + * multiple of the hardware block size and defines + * how many bytes a virtual block is made up of. + * + * A virtual block is simply a unit specific to + * the disk framework that represents multiple + * hardware disk blocks. + */ +#if defined(__V_BSIZE) +#define V_BSIZE __V_BSIZE +#else +#define V_BSIZE 4096 +#endif /* __V_BSIZE */ + +/* Sanitize the silly human's input */ +_Static_assert(V_BSIZE > 512, "V_BSIZE must be > 512"); +_Static_assert((V_BSIZE & 1) == 0, "V_BSIZE must be a power of two"); #define DISK_PRIMARY 0 /* ID of primary disk */ |