include/os/linux/spl/sys/sysmacros.h

   1 /*
   2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *
  10  *  The SPL is free software; you can redistribute it and/or modify it
  11  *  under the terms of the GNU General Public License as published by the
  12  *  Free Software Foundation; either version 2 of the License, or (at your
  13  *  option) any later version.
  14  *
  15  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  16  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  18  *  for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along
  21  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #ifndef _SPL_SYSMACROS_H
  25 #define _SPL_SYSMACROS_H
  26
  27 #include <linux/module.h>
  28 #include <linux/sched.h>
  29 #include <linux/sched/rt.h>
  30 #include <linux/cpumask.h>
  31 #include <sys/debug.h>
  32 #include <sys/zone.h>
  33 #include <sys/signal.h>
  34 #include <asm/page.h>
  35
  36
  37 #ifndef _KERNEL
  38 #define _KERNEL                         __KERNEL__
  39 #endif
  40
  41 #define FALSE                           0
  42 #define TRUE                            1
  43
  44 #define INT8_MAX                        (127)
  45 #define INT8_MIN                        (-128)
  46 #define UINT8_MAX                       (255)
  47 #define UINT8_MIN                       (0)
  48
  49 #define INT16_MAX                       (32767)
  50 #define INT16_MIN                       (-32768)
  51 #define UINT16_MAX                      (65535)
  52 #define UINT16_MIN                      (0)
  53
  54 #define INT32_MAX                       INT_MAX
  55 #define INT32_MIN                       INT_MIN
  56 #define UINT32_MAX                      UINT_MAX
  57 #define UINT32_MIN                      UINT_MIN
  58
  59 #define INT64_MAX                       LLONG_MAX
  60 #define INT64_MIN                       LLONG_MIN
  61 #define UINT64_MAX                      ULLONG_MAX
  62 #define UINT64_MIN                      ULLONG_MIN
  63
  64 #define NBBY                            8
  65
  66 #define MAXMSGLEN                       256
  67 #define MAXNAMELEN                      256
  68 #define MAXPATHLEN                      4096
  69 #define MAXOFFSET_T                     LLONG_MAX
  70 #define MAXBSIZE                        8192
  71 #define DEV_BSIZE                       512
  72 #define DEV_BSHIFT                      9 /* log2(DEV_BSIZE) */
  73
  74 #define proc_pageout                    NULL
  75 #define curproc                         current
  76 #define max_ncpus                       num_possible_cpus()
  77 #define boot_ncpus                      num_online_cpus()
  78 #define CPU_SEQID                       smp_processor_id()
  79 #define CPU_SEQID_UNSTABLE              raw_smp_processor_id()
  80 #define is_system_labeled()             0
  81
  82 #ifndef RLIM64_INFINITY
  83 #define RLIM64_INFINITY                 (~0ULL)
  84 #endif
  85
  86 /*
  87  * 0..MAX_PRIO-1:               Process priority
  88  * 0..MAX_RT_PRIO-1:            RT priority tasks
  89  * MAX_RT_PRIO..MAX_PRIO-1:     SCHED_NORMAL tasks
  90  *
  91  * Treat shim tasks as SCHED_NORMAL tasks
  92  */
  93 #define minclsyspri                     (MAX_PRIO-1)
  94 #define maxclsyspri                     (MAX_RT_PRIO)
  95 #define defclsyspri                     (DEFAULT_PRIO)
  96
  97 #ifndef NICE_TO_PRIO
  98 #define NICE_TO_PRIO(nice)              (MAX_RT_PRIO + (nice) + 20)
  99 #endif
 100 #ifndef PRIO_TO_NICE
 101 #define PRIO_TO_NICE(prio)              ((prio) - MAX_RT_PRIO - 20)
 102 #endif
 103
 104 /*
 105  * Missing macros
 106  */
 107 #ifndef PAGESIZE
 108 #define PAGESIZE                        PAGE_SIZE
 109 #endif
 110
 111 #ifndef PAGESHIFT
 112 #define PAGESHIFT                       PAGE_SHIFT
 113 #endif
 114
 115 /* Missing globals */
 116 extern unsigned long spl_hostid;
 117
 118 /* Missing misc functions */
 119 extern uint32_t zone_get_hostid(void *zone);
 120 extern void spl_setup(void);
 121 extern void spl_cleanup(void);
 122
 123 /*
 124  * Only handles the first 4096 majors and first 256 minors. We don't have a
 125  * libc for the kernel module so we define this inline.
 126  */
 127 static inline dev_t
 128 makedev(unsigned int major, unsigned int minor)
 129 {
 130         return ((major & 0xFFF) << 8) | (minor & 0xFF);
 131 }
 132
 133 #define highbit(x)              __fls(x)
 134 #define lowbit(x)               __ffs(x)
 135
 136 #define highbit64(x)            fls64(x)
 137 #define makedevice(maj, min)    makedev(maj, min)
 138
 139 /* common macros */
 140 #ifndef MIN
 141 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
 142 #endif
 143 #ifndef MAX
 144 #define MAX(a, b)               ((a) < (b) ? (b) : (a))
 145 #endif
 146 #ifndef ABS
 147 #define ABS(a)                  ((a) < 0 ? -(a) : (a))
 148 #endif
 149 #ifndef DIV_ROUND_UP
 150 #define DIV_ROUND_UP(n, d)      (((n) + (d) - 1) / (d))
 151 #endif
 152 #ifndef roundup
 153 #define roundup(x, y)           ((((x) + ((y) - 1)) / (y)) * (y))
 154 #endif
 155 #ifndef howmany
 156 #define howmany(x, y)           (((x) + ((y) - 1)) / (y))
 157 #endif
 158
 159 /*
 160  * Compatibility macros/typedefs needed for Solaris -> Linux port
 161  */
 162 // Deprecated. Use P2ALIGN_TYPED instead.
 163 // #define      P2ALIGN(x, align)       ((x) & -(align))
 164 #define P2CROSS(x, y, align)    (((x) ^ (y)) > (align) - 1)
 165 #define P2ROUNDUP(x, align)     ((((x) - 1) | ((align) - 1)) + 1)
 166 #define P2PHASE(x, align)       ((x) & ((align) - 1))
 167 #define P2NPHASE(x, align)      (-(x) & ((align) - 1))
 168 #define ISP2(x)                 (((x) & ((x) - 1)) == 0)
 169 #define IS_P2ALIGNED(v, a)      ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
 170 #define P2BOUNDARY(off, len, align) \
 171                                 (((off) ^ ((off) + (len) - 1)) > (align) - 1)
 172
 173 /*
 174  * Typed version of the P2* macros.  These macros should be used to ensure
 175  * that the result is correctly calculated based on the data type of (x),
 176  * which is passed in as the last argument, regardless of the data
 177  * type of the alignment.  For example, if (x) is of type uint64_t,
 178  * and we want to round it up to a page boundary using "PAGESIZE" as
 179  * the alignment, we can do either
 180  *
 181  * P2ROUNDUP(x, (uint64_t)PAGESIZE)
 182  * or
 183  * P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
 184  */
 185 #define P2ALIGN_TYPED(x, align, type)   \
 186         ((type)(x) & -(type)(align))
 187 #define P2PHASE_TYPED(x, align, type)   \
 188         ((type)(x) & ((type)(align) - 1))
 189 #define P2NPHASE_TYPED(x, align, type)  \
 190         (-(type)(x) & ((type)(align) - 1))
 191 #define P2ROUNDUP_TYPED(x, align, type) \
 192         ((((type)(x) - 1) | ((type)(align) - 1)) + 1)
 193 #define P2END_TYPED(x, align, type)     \
 194         (-(~(type)(x) & -(type)(align)))
 195 #define P2PHASEUP_TYPED(x, align, phase, type)  \
 196         ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
 197 #define P2CROSS_TYPED(x, y, align, type)        \
 198         (((type)(x) ^ (type)(y)) > (type)(align) - 1)
 199 #define P2SAMEHIGHBIT_TYPED(x, y, type) \
 200         (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
 201
 202 #define SET_ERROR(err) \
 203         (__set_error(__FILE__, __func__, __LINE__, err), err)
 204
 205 #include <linux/sort.h>
 206 #define qsort(base, num, size, cmp)             \
 207         sort(base, num, size, cmp, NULL)
 208
 209 #if !defined(_KMEMUSER) && !defined(offsetof)
 210
 211 /* avoid any possibility of clashing with <stddef.h> version */
 212
 213 #define offsetof(s, m)  ((size_t)(&(((s *)0)->m)))
 214 #endif
 215
 216 #endif  /* _SPL_SYSMACROS_H */