binject.h

   1 #ifndef BINJECT_H
   2 #define BINJECT_H
   3
   4 #define BINJECT_MAGIC           0x89
   5 #define BINJECT_VER             0x01
   6 #define BINJECT_MAGIC_SHIFT     8
   7 #define BINJECT_VER_MASK        ((1 << BINJECT_MAGIC_SHIFT) - 1)
   8
   9 struct b_user_cmd {
  10         __u16 magic;    /* INPUT */
  11         __u16 type;     /* INPUT */
  12         __u32 error;    /* OUTPUT */
  13         __u32 flags;    /* INPUT */
  14         __u32 len;      /* INPUT */
  15         __u64 offset;   /* INPUT */
  16         __u64 buf;      /* INPUT */
  17         __u64 usr_ptr;  /* PASSED THROUGH */
  18         __u64 nsec;     /* OUTPUT */
  19 };
  20
  21 struct b_ioctl_cmd {
  22         int fd;
  23         int minor;
  24 };
  25
  26 #define BINJECT_IOCTL_CHR       'J'
  27 #define B_IOCTL_ADD             _IOWR(BINJECT_IOCTL_CHR, 1, struct b_ioctl_cmd)
  28 #define B_IOCTL_DEL             _IOWR(BINJECT_IOCTL_CHR, 2, struct b_ioctl_cmd)
  29
  30 enum {
  31         B_TYPE_READ             = 0,
  32         B_TYPE_WRITE,
  33         B_TYPE_DISCARD,
  34         B_TYPE_READVOID,
  35         B_TYPE_WRITEZERO,
  36         B_TYPE_READBARRIER,
  37         B_TYPE_WRITEBARRIER,
  38         B_TYPE_NR
  39 };
  40
  41 enum {
  42         __B_FLAG_SYNC   = 0,
  43         __B_FLAG_UNPLUG,
  44         __B_FLAG_NOIDLE,
  45         __B_FLAG_BARRIER,
  46         __B_FLAG_META,
  47         __B_FLAG_RAHEAD,
  48         __B_FLAG_FAILFAST_DEV,
  49         __B_FLAG_FAILFAST_TRANSPORT,
  50         __B_FLAG_FAILFAST_DRIVER,
  51         __B_FLAG_NR,
  52
  53         B_FLAG_SYNC                     = 1 << __B_FLAG_SYNC,
  54         B_FLAG_UNPLUG                   = 1 << __B_FLAG_UNPLUG,
  55         B_FLAG_NOIDLE                   = 1 << __B_FLAG_NOIDLE,
  56         B_FLAG_BARRIER                  = 1 << __B_FLAG_BARRIER,
  57         B_FLAG_META                     = 1 << __B_FLAG_META,
  58         B_FLAG_RAHEAD                   = 1 << __B_FLAG_RAHEAD,
  59         B_FLAG_FAILFAST_DEV             = 1 << __B_FLAG_FAILFAST_DEV,
  60         B_FLAG_FAILFAST_TRANSPORT       = 1 << __B_FLAG_FAILFAST_TRANSPORT,
  61         B_FLAG_FAILFAST_DRIVER          = 1 << __B_FLAG_FAILFAST_DRIVER,
  62 };
  63
  64 static inline void binject_buc_set_magic(struct b_user_cmd *buc)
  65 {
  66         buc->magic = (BINJECT_MAGIC << BINJECT_MAGIC_SHIFT) | BINJECT_VER;
  67 }
  68
  69 static inline int binject_buc_check_magic(struct b_user_cmd *buc)
  70 {
  71         return ((buc->magic & BINJECT_VER_MASK) == BINJECT_VER) &&
  72                 ((buc->magic >> BINJECT_MAGIC_SHIFT) == BINJECT_MAGIC);
  73 }
  74
  75 #endif