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  * Cast the result to uint64_t to prevent overflowing when we append distro
  44  * specific version information.
  45  */
  46 #if (LTTNG_LINUX_PATCH >= 256)
  47
  48 #define LTTNG_KERNEL_VERSION(a, b, c) \
  49         ((((a) << 24) + ((b) << 16) + (c)) * 1ULL)
  50
  51 #define LTTNG_LINUX_VERSION_CODE \
  52         LTTNG_KERNEL_VERSION(LTTNG_LINUX_MAJOR, LTTNG_LINUX_MINOR, LTTNG_LINUX_PATCH)
  53
  54 #else
  55
  56 #define LTTNG_KERNEL_VERSION(a, b, c) (KERNEL_VERSION(a, b, c) * 1ULL)
  57 #define LTTNG_LINUX_VERSION_CODE (LINUX_VERSION_CODE * 1ULL)
  58
  59 #endif
  60
  61 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(2,6,33))
  62 #include <generated/utsrelease.h>
  63 #else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(2,6,33)) */
  64 #include <linux/utsrelease.h>
  65 #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(2,6,33)) */
  66
  67 /*
  68  * This macro checks if the kernel version is between the two specified
  69  * versions (lower limit inclusive, upper limit exclusive).
  70  */
  71 #define LTTNG_KERNEL_RANGE(a_low, b_low, c_low, a_high, b_high, c_high) \
  72         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \
  73          LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(a_high, b_high, c_high))
  74
  75 /* Ubuntu */
  76
  77 #define LTTNG_UBUNTU_KERNEL_VERSION(a, b, c, d) \
  78         (((LTTNG_KERNEL_VERSION(a, b, c)) << 16) + (d))
  79
  80 #ifdef UTS_UBUNTU_RELEASE_ABI
  81 #define LTTNG_UBUNTU_VERSION_CODE \
  82         ((LTTNG_LINUX_VERSION_CODE << 16) + UTS_UBUNTU_RELEASE_ABI)
  83 #else
  84 #define LTTNG_UBUNTU_VERSION_CODE       0
  85 #endif
  86
  87 #define LTTNG_UBUNTU_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
  88                 a_high, b_high, c_high, d_high) \
  89         (LTTNG_UBUNTU_VERSION_CODE >= \
  90                 LTTNG_UBUNTU_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
  91                 LTTNG_UBUNTU_VERSION_CODE < \
  92                 LTTNG_UBUNTU_KERNEL_VERSION(a_high, b_high, c_high, d_high))
  93
  94 /* Debian */
  95
  96 #define LTTNG_DEBIAN_KERNEL_VERSION(a, b, c, d, e, f) \
  97         (((LTTNG_KERNEL_VERSION(a, b, c)) * 1000000ULL) + ((d) * 10000) + ((e) * 100) + (f))
  98
  99 #ifdef DEBIAN_API_VERSION
 100 #define LTTNG_DEBIAN_VERSION_CODE \
 101         ((LTTNG_LINUX_VERSION_CODE * 1000000ULL) + DEBIAN_API_VERSION)
 102 #else
 103 #define LTTNG_DEBIAN_VERSION_CODE       0
 104 #endif
 105
 106 #define LTTNG_DEBIAN_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
 107                 a_high, b_high, c_high, d_high, e_high, f_high) \
 108         (LTTNG_DEBIAN_VERSION_CODE >= \
 109                 LTTNG_DEBIAN_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low, f_low) && \
 110                 LTTNG_DEBIAN_VERSION_CODE < \
 111                 LTTNG_DEBIAN_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high, f_high))
 112
 113 #define LTTNG_RHEL_KERNEL_VERSION(a, b, c, d, e, f) \
 114         (((LTTNG_KERNEL_VERSION(a, b, c)) * 100000000ULL) + ((d) * 10000) + ((e) * 100) + (f))
 115
 116 /* RHEL */
 117
 118 #ifdef RHEL_API_VERSION
 119 #define LTTNG_RHEL_VERSION_CODE \
 120         ((LTTNG_LINUX_VERSION_CODE * 100000000ULL) + RHEL_API_VERSION)
 121 #else
 122 #define LTTNG_RHEL_VERSION_CODE         0
 123 #endif
 124
 125 #define LTTNG_RHEL_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
 126                 a_high, b_high, c_high, d_high, e_high, f_high) \
 127         (LTTNG_RHEL_VERSION_CODE >= \
 128                 LTTNG_RHEL_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low, f_low) && \
 129                 LTTNG_RHEL_VERSION_CODE < \
 130                 LTTNG_RHEL_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high, f_high))
 131
 132 /* SUSE Linux enterprise */
 133
 134 #define LTTNG_SLE_KERNEL_VERSION(a, b, c, d, e, f) \
 135         (((LTTNG_KERNEL_VERSION(a, b, c)) * 100000000ULL) + ((d) * 100000) + ((e) * 100) + (f))
 136
 137 #ifdef SLE_API_VERSION
 138 #define LTTNG_SLE_VERSION_CODE \
 139         ((LTTNG_LINUX_VERSION_CODE * 100000000ULL) + SLE_API_VERSION)
 140 #else
 141 #define LTTNG_SLE_VERSION_CODE  0
 142 #endif
 143
 144 #define LTTNG_SLE_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
 145                 a_high, b_high, c_high, d_high, e_high, f_high) \
 146         (LTTNG_SLE_VERSION_CODE >= \
 147                 LTTNG_SLE_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low, f_low) && \
 148                 LTTNG_SLE_VERSION_CODE < \
 149                 LTTNG_SLE_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high, f_high))
 150
 151 /* Fedora */
 152
 153 #define LTTNG_FEDORA_KERNEL_VERSION(a, b, c, d) \
 154         (((LTTNG_KERNEL_VERSION(a, b, c)) * 10000ULL) + (d))
 155
 156 #ifdef FEDORA_REVISION_VERSION
 157 #define LTTNG_FEDORA_VERSION_CODE \
 158         ((LTTNG_LINUX_VERSION_CODE * 10000ULL) + FEDORA_REVISION_VERSION)
 159 #else
 160 #define LTTNG_FEDORA_VERSION_CODE         0
 161 #endif
 162
 163 #define LTTNG_FEDORA_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
 164                 a_high, b_high, c_high, d_high) \
 165         (LTTNG_FEDORA_VERSION_CODE >= \
 166                 LTTNG_FEDORA_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
 167                 LTTNG_FEDORA_VERSION_CODE < \
 168                 LTTNG_FEDORA_KERNEL_VERSION(a_high, b_high, c_high, d_high))
 169
 170 /* RT patch */
 171
 172 #define LTTNG_RT_KERNEL_VERSION(a, b, c, d) \
 173         (((LTTNG_KERNEL_VERSION(a, b, c)) << 16) + (d))
 174
 175 #ifdef RT_PATCH_VERSION
 176 #define LTTNG_RT_VERSION_CODE \
 177         ((LTTNG_LINUX_VERSION_CODE << 16) + RT_PATCH_VERSION)
 178 #else
 179 #define LTTNG_RT_VERSION_CODE   0
 180 #endif
 181
 182 #define LTTNG_RT_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
 183                 a_high, b_high, c_high, d_high) \
 184         (LTTNG_RT_VERSION_CODE >= \
 185                 LTTNG_RT_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
 186                 LTTNG_RT_VERSION_CODE < \
 187                 LTTNG_RT_KERNEL_VERSION(a_high, b_high, c_high, d_high))
 188
 189 #endif /* _LTTNG_KERNEL_VERSION_H */