lttng-kernel-version.h

   1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
   2  *
   3  * lttng-kernel-version.h
   4  *
   5  * Contains helpers to check kernel version conditions.
   6  *
   7  * Copyright (C) 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  */
   9
  10 #ifndef _LTTNG_KERNEL_VERSION_H
  11 #define _LTTNG_KERNEL_VERSION_H
  12
  13 #include <linux/version.h>
  14
  15 /*
  16  * The following defines are extracted from the toplevel Linux Makefile and
  17  * passed on the command line -with '-D'.
  18  */
  19
  20 #ifndef LTTNG_LINUX_MAJOR
  21 #define LTTNG_LINUX_MAJOR 0
  22 #endif
  23
  24 #ifndef LTTNG_LINUX_MINOR
  25 #define LTTNG_LINUX_MINOR 0
  26 #endif
  27
  28 #ifndef LTTNG_LINUX_PATCH
  29 #define LTTNG_LINUX_PATCH 0
  30 #endif
  31
  32 /*
  33  * Some stable releases have overflowed the 8bits allocated to the sublevel in
  34  * the version code. To determine if the current kernel is affected, use the
  35  * sublevel version from the Makefile. This is currently true for the 4.4.256
  36  * and 4.9.256 stable releases.
  37  *
  38  * When the sublevel has overflowed, use the values from the Makefile instead
  39  * of LINUX_VERSION_CODE from the kernel headers and allocate 16bits.
  40  * Otherwise, keep using the version code from the headers to minimise the
  41  * behavior change and avoid regressions.
  42  */
  43 #if (LTTNG_LINUX_PATCH >= 256)
  44
  45 #define LTTNG_KERNEL_VERSION(a, b, c) \
  46         (((a) << 24) + ((b) << 16) + (c))
  47
  48 #define LTTNG_LINUX_VERSION_CODE \
  49         LTTNG_KERNEL_VERSION(LTTNG_LINUX_MAJOR, LTTNG_LINUX_MINOR, LTTNG_LINUX_PATCH)
  50
  51 #else
  52
  53 #define LTTNG_KERNEL_VERSION(a, b, c) KERNEL_VERSION(a, b, c)
  54 #define LTTNG_LINUX_VERSION_CODE LINUX_VERSION_CODE
  55
  56 #endif
  57
  58 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(2,6,33))
  59 #include <generated/utsrelease.h>
  60 #else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(2,6,33)) */
  61 #include <linux/utsrelease.h>
  62 #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(2,6,33)) */
  63
  64 /*
  65  * This macro checks if the kernel version is between the two specified
  66  * versions (lower limit inclusive, upper limit exclusive).
  67  */
  68 #define LTTNG_KERNEL_RANGE(a_low, b_low, c_low, a_high, b_high, c_high) \
  69         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \
  70          LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(a_high, b_high, c_high))
  71
  72 /* Ubuntu */
  73
  74 #define LTTNG_UBUNTU_KERNEL_VERSION(a, b, c, d) \
  75         (((LTTNG_KERNEL_VERSION(a, b, c)) << 16) + (d))
  76
  77 #ifdef UTS_UBUNTU_RELEASE_ABI
  78 #define LTTNG_UBUNTU_VERSION_CODE \
  79         ((LTTNG_LINUX_VERSION_CODE << 16) + UTS_UBUNTU_RELEASE_ABI)
  80 #else
  81 #define LTTNG_UBUNTU_VERSION_CODE       0
  82 #endif
  83
  84 #define LTTNG_UBUNTU_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
  85                 a_high, b_high, c_high, d_high) \
  86         (LTTNG_UBUNTU_VERSION_CODE >= \
  87                 LTTNG_UBUNTU_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
  88                 LTTNG_UBUNTU_VERSION_CODE < \
  89                 LTTNG_UBUNTU_KERNEL_VERSION(a_high, b_high, c_high, d_high))
  90
  91 /* Debian */
  92
  93 #define LTTNG_DEBIAN_KERNEL_VERSION(a, b, c, d, e, f) \
  94         (((LTTNG_KERNEL_VERSION(a, b, c)) * 1000000ULL) + ((d) * 10000) + ((e) * 100) + (f))
  95
  96 #ifdef DEBIAN_API_VERSION
  97 #define LTTNG_DEBIAN_VERSION_CODE \
  98         ((LTTNG_LINUX_VERSION_CODE * 1000000ULL) + DEBIAN_API_VERSION)
  99 #else
 100 #define LTTNG_DEBIAN_VERSION_CODE       0
 101 #endif
 102
 103 #define LTTNG_DEBIAN_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
 104                 a_high, b_high, c_high, d_high, e_high, f_high) \
 105         (LTTNG_DEBIAN_VERSION_CODE >= \
 106                 LTTNG_DEBIAN_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low, f_low) && \
 107                 LTTNG_DEBIAN_VERSION_CODE < \
 108                 LTTNG_DEBIAN_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high, f_high))
 109
 110 #define LTTNG_RHEL_KERNEL_VERSION(a, b, c, d, e, f) \
 111         (((LTTNG_KERNEL_VERSION(a, b, c)) * 10000000ULL) + ((d) * 10000) + ((e) * 100) + (f))
 112
 113 /* RHEL */
 114
 115 #ifdef RHEL_API_VERSION
 116 #define LTTNG_RHEL_VERSION_CODE \
 117         ((LTTNG_LINUX_VERSION_CODE * 10000000ULL) + RHEL_API_VERSION)
 118 #else
 119 #define LTTNG_RHEL_VERSION_CODE         0
 120 #endif
 121
 122 #define LTTNG_RHEL_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
 123                 a_high, b_high, c_high, d_high, e_high, f_high) \
 124         (LTTNG_RHEL_VERSION_CODE >= \
 125                 LTTNG_RHEL_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low, f_low) && \
 126                 LTTNG_RHEL_VERSION_CODE < \
 127                 LTTNG_RHEL_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high, f_high))
 128
 129 /* SUSE Linux enterprise */
 130
 131 #define LTTNG_SLE_KERNEL_VERSION(a, b, c, d, e, f) \
 132         (((LTTNG_KERNEL_VERSION(a, b, c)) * 10000000ULL) + ((d) * 10000) + ((e) * 100) + (f))
 133
 134 #ifdef SLE_API_VERSION
 135 #define LTTNG_SLE_VERSION_CODE \
 136         ((LTTNG_LINUX_VERSION_CODE * 10000000ULL) + SLE_API_VERSION)
 137 #else
 138 #define LTTNG_SLE_VERSION_CODE  0
 139 #endif
 140
 141 #define LTTNG_SLE_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
 142                 a_high, b_high, c_high, d_high, e_high, f_high) \
 143         (LTTNG_SLE_VERSION_CODE >= \
 144                 LTTNG_SLE_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low, f_low) && \
 145                 LTTNG_SLE_VERSION_CODE < \
 146                 LTTNG_SLE_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high, f_high))
 147
 148 /* Fedora */
 149
 150 #define LTTNG_FEDORA_KERNEL_VERSION(a, b, c, d) \
 151         (((LTTNG_KERNEL_VERSION(a, b, c)) * 10000ULL) + (d))
 152
 153 #ifdef FEDORA_REVISION_VERSION
 154 #define LTTNG_FEDORA_VERSION_CODE \
 155         ((LTTNG_LINUX_VERSION_CODE * 10000ULL) + FEDORA_REVISION_VERSION)
 156 #else
 157 #define LTTNG_FEDORA_VERSION_CODE         0
 158 #endif
 159
 160 #define LTTNG_FEDORA_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
 161                 a_high, b_high, c_high, d_high) \
 162         (LTTNG_FEDORA_VERSION_CODE >= \
 163                 LTTNG_FEDORA_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
 164                 LTTNG_FEDORA_VERSION_CODE < \
 165                 LTTNG_FEDORA_KERNEL_VERSION(a_high, b_high, c_high, d_high))
 166
 167 /* RT patch */
 168
 169 #define LTTNG_RT_KERNEL_VERSION(a, b, c, d) \
 170         (((LTTNG_KERNEL_VERSION(a, b, c)) << 8) + (d))
 171
 172 #ifdef RT_PATCH_VERSION
 173 #define LTTNG_RT_VERSION_CODE \
 174         ((LTTNG_LINUX_VERSION_CODE << 8) + RT_PATCH_VERSION)
 175 #else
 176 #define LTTNG_RT_VERSION_CODE   0
 177 #endif
 178
 179 #define LTTNG_RT_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
 180                 a_high, b_high, c_high, d_high) \
 181         (LTTNG_RT_VERSION_CODE >= \
 182                 LTTNG_RT_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
 183                 LTTNG_RT_VERSION_CODE < \
 184                 LTTNG_RT_KERNEL_VERSION(a_high, b_high, c_high, d_high))
 185
 186 #endif /* _LTTNG_KERNEL_VERSION_H */