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