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 FALSE                           0
  17 #define TRUE                            1
  18
  19 #define INT32_MAX                       INT_MAX
  20 #define UINT64_MAX                      (~0ULL)
  21 #define NBBY                            8
  22 #define ENOTSUP                         ENOTSUPP
  23
  24 #define MAXNAMELEN                      256
  25 #define MAXPATHLEN                      PATH_MAX
  26 #define MAXOFFSET_T                     0x7fffffffffffffffl
  27
  28 #define MAXBSIZE                        8192
  29 #define DEV_BSIZE                       512
  30 #define DEV_BSHIFT                      9 /* log2(DEV_BSIZE) */
  31
  32 #define __va_list                       va_list
  33 #define max_ncpus                       64
  34 #define _NOTE(x)
  35
  36 /* 0..MAX_PRIO-1:               Process priority
  37  * 0..MAX_RT_PRIO-1:            RT priority tasks
  38  * MAX_RT_PRIO..MAX_PRIO-1:     SCHED_NORMAL tasks
  39  *
  40  * Treat shim tasks as SCHED_NORMAL tasks
  41  */
  42 #define minclsyspri                     (MAX_RT_PRIO)
  43 #define maxclsyspri                     (MAX_PRIO-1)
  44
  45 #define NICE_TO_PRIO(nice)              (MAX_RT_PRIO + (nice) + 20)
  46 #define PRIO_TO_NICE(prio)              ((prio) - MAX_RT_PRIO - 20)
  47
  48 #define kred                            NULL
  49
  50 #define FREAD                           1
  51 #define FWRITE                          2
  52 #define FCREAT  O_CREAT
  53 #define FTRUNC  O_TRUNC
  54 #define FOFFMAX O_LARGEFILE
  55 #define FSYNC   O_SYNC
  56 #define FDSYNC  O_DSYNC
  57 #define FRSYNC  O_RSYNC
  58 #define FEXCL   O_EXCL
  59
  60 #define FNODSYNC  0x10000 /* fsync pseudo flag */
  61 #define FNOFOLLOW 0x20000 /* don't follow symlinks */
  62
  63 /* Missing macros
  64  */
  65 #define PAGESIZE                        PAGE_SIZE
  66
  67 /* from Solaris sys/byteorder.h */
  68 #define BSWAP_8(x)      ((x) & 0xff)
  69 #define BSWAP_16(x)     ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8))
  70 #define BSWAP_32(x)     ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16))
  71 #define BSWAP_64(x)     ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32))
  72
  73 /* Map some simple functions.
  74  */
  75 #define bzero(ptr,size)                 memset(ptr,0,size)
  76 #define bcopy(src,dest,size)            memcpy(dest,src,size)
  77 #define bcmp(src,dest,size)             memcmp((src), (dest), (size_t)(size))
  78 #define ASSERT(x)                       BUG_ON(!(x))
  79 #define VERIFY(x)                       ASSERT(x)
  80
  81 #define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \
  82         const TYPE __left = (TYPE)(LEFT);        \
  83         const TYPE __right = (TYPE)(RIGHT);      \
  84         if (!(__left OP __right))                \
  85                 BUG();                           \
  86 } while (0)
  87
  88 #define VERIFY3S(x, y, z)       VERIFY3_IMPL(x, y, z, int64_t)
  89 #define VERIFY3U(x, y, z)       VERIFY3_IMPL(x, y, z, uint64_t)
  90 #define VERIFY3P(x, y, z)       VERIFY3_IMPL(x, y, z, uintptr_t)
  91
  92 #define ASSERT3S(x, y, z)       VERIFY3S(x, y, z)
  93 #define ASSERT3U(x, y, z)       VERIFY3U(x, y, z)
  94 #define ASSERT3P(x, y, z)       VERIFY3P(x, y, z)
  95
  96 /* Dtrace probes do not exist in the linux kernel */
  97
  98 #ifdef DTRACE_PROBE1
  99 #undef  DTRACE_PROBE1
 100 #endif  /* DTRACE_PROBE1 */
 101 #define DTRACE_PROBE1(a, b, c)  ((void)0)
 102
 103 #ifdef DTRACE_PROBE2
 104 #undef  DTRACE_PROBE2
 105 #endif  /* DTRACE_PROBE2 */
 106 #define DTRACE_PROBE2(a, b, c, d, e)    ((void)0)
 107
 108 #ifdef DTRACE_PROBE3
 109 #undef  DTRACE_PROBE3
 110 #endif  /* DTRACE_PROBE3 */
 111 #define DTRACE_PROBE3(a, b, c, d, e, f, g)      ((void)0)
 112
 113 #ifdef DTRACE_PROBE4
 114 #undef  DTRACE_PROBE4
 115 #endif  /* DTRACE_PROBE4 */
 116 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)        ((void)0)
 117
 118 /* Missing globals */
 119 extern int p0;
 120
 121 /* Missing misc functions */
 122 extern int highbit(unsigned long i);
 123
 124 #define makedevice(maj,min) makedev(maj,min)
 125
 126 /* XXX - Borrowed from zfs project libsolcompat/include/sys/sysmacros.h */
 127 /* common macros */
 128 #ifndef MIN
 129 #define MIN(a, b)       ((a) < (b) ? (a) : (b))
 130 #endif
 131 #ifndef MAX
 132 #define MAX(a, b)       ((a) < (b) ? (b) : (a))
 133 #endif
 134 #ifndef ABS
 135 #define ABS(a)          ((a) < 0 ? -(a) : (a))
 136 #endif
 137
 138 /*
 139  * Compatibility macros/typedefs needed for Solaris -> Linux port
 140  */
 141 #define P2ALIGN(x, align)    ((x) & -(align))
 142 #define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1)
 143 #define P2ROUNDUP(x, align)  (-(-(x) & -(align)))
 144 #define P2ROUNDUP_TYPED(x, align, type) \
 145                              (-(-(type)(x) & -(type)(align)))
 146 #define P2PHASE(x, align)    ((x) & ((align) - 1))
 147 #define P2NPHASE(x, align)   (-(x) & ((align) - 1))
 148 #define P2NPHASE_TYPED(x, align, type) \
 149                              (-(type)(x) & ((type)(align) - 1))
 150 #define ISP2(x)              (((x) & ((x) - 1)) == 0)
 151 #define IS_P2ALIGNED(v, a)   ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
 152
 153 /*
 154  * Typed version of the P2* macros.  These macros should be used to ensure
 155  * that the result is correctly calculated based on the data type of (x),
 156  * which is passed in as the last argument, regardless of the data
 157  * type of the alignment.  For example, if (x) is of type uint64_t,
 158  * and we want to round it up to a page boundary using "PAGESIZE" as
 159  * the alignment, we can do either
 160  * P2ROUNDUP(x, (uint64_t)PAGESIZE)
 161  * or
 162  * P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
 163  */
 164 #define P2ALIGN_TYPED(x, align, type)   \
 165         ((type)(x) & -(type)(align))
 166 #define P2PHASE_TYPED(x, align, type)   \
 167         ((type)(x) & ((type)(align) - 1))
 168 #define P2NPHASE_TYPED(x, align, type)  \
 169         (-(type)(x) & ((type)(align) - 1))
 170 #define P2ROUNDUP_TYPED(x, align, type) \
 171         (-(-(type)(x) & -(type)(align)))
 172 #define P2END_TYPED(x, align, type)     \
 173         (-(~(type)(x) & -(type)(align)))
 174 #define P2PHASEUP_TYPED(x, align, phase, type)  \
 175         ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
 176 #define P2CROSS_TYPED(x, y, align, type)        \
 177         (((type)(x) ^ (type)(y)) > (type)(align) - 1)
 178 #define P2SAMEHIGHBIT_TYPED(x, y, type) \
 179         (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
 180
 181 #if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof)
 182
 183 /* avoid any possibility of clashing with <stddef.h> version */
 184
 185 #define offsetof(s, m)  ((size_t)(&(((s *)0)->m)))
 186 #endif
 187
 188 #ifdef  __cplusplus
 189 }
 190 #endif
 191
 192 #endif  /* _SPL_SYSMACROS_H */