include/sys/sysmacros.h

   1 #ifndef _SPL_SYSMACROS_H
   2 #define _SPL_SYSMACROS_H
   3
   4 #ifdef  __cplusplus
   5 extern "C" {
   6 #endif
   7
   8 #include <linux/module.h>
   9
  10 #ifndef _KERNEL
  11 #define _KERNEL                         __KERNEL__
  12 #endif
  13
  14 /* Missing defines.
  15  */
  16 #define INT32_MAX                       INT_MAX
  17 #define UINT64_MAX                      (~0ULL)
  18 #define NBBY                            8
  19 #define ENOTSUP                         ENOTSUPP
  20 #define MAXNAMELEN                      256
  21 #define MAXPATHLEN                      PATH_MAX
  22 #define __va_list                       va_list
  23 #define max_ncpus                       64
  24
  25 /* 0..MAX_PRIO-1:               Process priority
  26  * 0..MAX_RT_PRIO-1:            RT priority tasks
  27  * MAX_RT_PRIO..MAX_PRIO-1:     SCHED_NORMAL tasks
  28  *
  29  * Treat shim tasks as SCHED_NORMAL tasks
  30  */
  31 #define minclsyspri                     (MAX_RT_PRIO)
  32 #define maxclsyspri                     (MAX_PRIO-1)
  33
  34 #define NICE_TO_PRIO(nice)              (MAX_RT_PRIO + (nice) + 20)
  35 #define PRIO_TO_NICE(prio)              ((prio) - MAX_RT_PRIO - 20)
  36
  37 #define kred                            NULL
  38
  39 #define FREAD                           1
  40 #define FWRITE                          2
  41 #define FCREAT  O_CREAT
  42 #define FTRUNC  O_TRUNC
  43 #define FOFFMAX O_LARGEFILE
  44 #define FSYNC   O_SYNC
  45 #define FDSYNC  O_DSYNC
  46 #define FRSYNC  O_RSYNC
  47 #define FEXCL   O_EXCL
  48
  49 #define FNODSYNC  0x10000 /* fsync pseudo flag */
  50 #define FNOFOLLOW 0x20000 /* don't follow symlinks */
  51
  52 /* Missing macros
  53  */
  54 #define PAGESIZE                        PAGE_SIZE
  55
  56 /* from Solaris sys/byteorder.h */
  57 #define BSWAP_8(x)      ((x) & 0xff)
  58 #define BSWAP_16(x)     ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8))
  59 #define BSWAP_32(x)     ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16))
  60 #define BSWAP_64(x)     ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32))
  61
  62 /* Map some simple functions.
  63  */
  64 #define bzero(ptr,size)                 memset(ptr,0,size)
  65 #define bcopy(src,dest,size)            memcpy(dest,src,size)
  66 #define ASSERT(x)                       BUG_ON(!(x))
  67 #define VERIFY(x)
  68
  69 #define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \
  70         const TYPE __left = (TYPE)(LEFT);        \
  71         const TYPE __right = (TYPE)(RIGHT);      \
  72         if (!(__left OP __right))                \
  73                 BUG();                           \
  74 } while (0)
  75
  76 #define VERIFY3S(x, y, z)       VERIFY3_IMPL(x, y, z, int64_t)
  77 #define VERIFY3U(x, y, z)       VERIFY3_IMPL(x, y, z, uint64_t)
  78 #define VERIFY3P(x, y, z)       VERIFY3_IMPL(x, y, z, uintptr_t)
  79
  80 #define ASSERT3S(x, y, z)       VERIFY3S(x, y, z)
  81 #define ASSERT3U(x, y, z)       VERIFY3U(x, y, z)
  82 #define ASSERT3P(x, y, z)       VERIFY3P(x, y, z)
  83
  84 /* Dtrace probes do not exist in the linux kernel */
  85
  86 #ifdef DTRACE_PROBE1
  87 #undef  DTRACE_PROBE1
  88 #endif  /* DTRACE_PROBE1 */
  89 #define DTRACE_PROBE1(a, b, c)  ((void)0)
  90
  91 #ifdef DTRACE_PROBE2
  92 #undef  DTRACE_PROBE2
  93 #endif  /* DTRACE_PROBE2 */
  94 #define DTRACE_PROBE2(a, b, c, d, e)    ((void)0)
  95
  96 #ifdef DTRACE_PROBE3
  97 #undef  DTRACE_PROBE3
  98 #endif  /* DTRACE_PROBE3 */
  99 #define DTRACE_PROBE3(a, b, c, d, e, f, g)      ((void)0)
 100
 101 #ifdef DTRACE_PROBE4
 102 #undef  DTRACE_PROBE4
 103 #endif  /* DTRACE_PROBE4 */
 104 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)        ((void)0)
 105
 106 /* Missing globals
 107  */
 108 extern int p0;
 109
 110 #define makedevice(maj,min) makedev(maj,min)
 111
 112 /* XXX - Borrowed from zfs project libsolcompat/include/sys/sysmacros.h */
 113 /* common macros */
 114 #ifndef MIN
 115 #define MIN(a, b)       ((a) < (b) ? (a) : (b))
 116 #endif
 117 #ifndef MAX
 118 #define MAX(a, b)       ((a) < (b) ? (b) : (a))
 119 #endif
 120 #ifndef ABS
 121 #define ABS(a)          ((a) < 0 ? -(a) : (a))
 122 #endif
 123
 124 /*
 125  * Compatibility macros/typedefs needed for Solaris -> Linux port
 126  */
 127 #define P2ALIGN(x, align)    ((x) & -(align))
 128 #define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1)
 129 #define P2ROUNDUP(x, align)  (-(-(x) & -(align)))
 130 #define P2ROUNDUP_TYPED(x, align, type) \
 131                              (-(-(type)(x) & -(type)(align)))
 132 #define P2PHASE(x, align)    ((x) & ((align) - 1))
 133 #define P2NPHASE(x, align)   (-(x) & ((align) - 1))
 134 #define P2NPHASE_TYPED(x, align, type) \
 135                              (-(type)(x) & ((type)(align) - 1))
 136 #define ISP2(x)              (((x) & ((x) - 1)) == 0)
 137 #define IS_P2ALIGNED(v, a)   ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
 138
 139 /*
 140  * Typed version of the P2* macros.  These macros should be used to ensure
 141  * that the result is correctly calculated based on the data type of (x),
 142  * which is passed in as the last argument, regardless of the data
 143  * type of the alignment.  For example, if (x) is of type uint64_t,
 144  * and we want to round it up to a page boundary using "PAGESIZE" as
 145  * the alignment, we can do either
 146  * P2ROUNDUP(x, (uint64_t)PAGESIZE)
 147  * or
 148  * P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
 149  */
 150 #define P2ALIGN_TYPED(x, align, type)   \
 151         ((type)(x) & -(type)(align))
 152 #define P2PHASE_TYPED(x, align, type)   \
 153         ((type)(x) & ((type)(align) - 1))
 154 #define P2NPHASE_TYPED(x, align, type)  \
 155         (-(type)(x) & ((type)(align) - 1))
 156 #define P2ROUNDUP_TYPED(x, align, type) \
 157         (-(-(type)(x) & -(type)(align)))
 158 #define P2END_TYPED(x, align, type)     \
 159         (-(~(type)(x) & -(type)(align)))
 160 #define P2PHASEUP_TYPED(x, align, phase, type)  \
 161         ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
 162 #define P2CROSS_TYPED(x, y, align, type)        \
 163         (((type)(x) ^ (type)(y)) > (type)(align) - 1)
 164 #define P2SAMEHIGHBIT_TYPED(x, y, type) \
 165         (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
 166
 167 #if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof)
 168
 169 /* avoid any possibility of clashing with <stddef.h> version */
 170
 171 #define offsetof(s, m)  ((size_t)(&(((s *)0)->m)))
 172 #endif
 173
 174 #ifdef  __cplusplus
 175 }
 176 #endif
 177
 178 #endif  /* _SPL_SYSMACROS_H */