include/lttng/kernel-version.h

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