| 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 <linux/types.h> |
| 15 | #include <generated/utsrelease.h> |
| 16 | |
| 17 | /* |
| 18 | * The following defines are extracted from the toplevel Linux Makefile and |
| 19 | * passed on the command line -with '-D'. |
| 20 | */ |
| 21 | |
| 22 | #ifndef LTTNG_LINUX_MAJOR |
| 23 | #define LTTNG_LINUX_MAJOR 0 |
| 24 | #endif |
| 25 | |
| 26 | #ifndef LTTNG_LINUX_MINOR |
| 27 | #define LTTNG_LINUX_MINOR 0 |
| 28 | #endif |
| 29 | |
| 30 | #ifndef LTTNG_LINUX_PATCH |
| 31 | #define LTTNG_LINUX_PATCH 0 |
| 32 | #endif |
| 33 | |
| 34 | /* |
| 35 | * Some stable releases have overflowed the 8bits allocated to the sublevel in |
| 36 | * the version code. To determine if the current kernel is affected, use the |
| 37 | * sublevel version from the Makefile. This is currently true for the 4.4.256 |
| 38 | * and 4.9.256 stable releases. |
| 39 | * |
| 40 | * When the sublevel has overflowed, use the values from the Makefile instead |
| 41 | * of LINUX_VERSION_CODE from the kernel headers and allocate 16bits. |
| 42 | * Otherwise, keep using the version code from the headers to minimise the |
| 43 | * behavior change and avoid regressions. |
| 44 | * |
| 45 | * Cast the result to uint64_t to prevent overflowing when we append distro |
| 46 | * specific version information. |
| 47 | */ |
| 48 | #if (LTTNG_LINUX_PATCH >= 256) |
| 49 | |
| 50 | #define LTTNG_KERNEL_VERSION(a, b, c) \ |
| 51 | ((((a) << 24) + ((b) << 16) + (c)) * 1ULL) |
| 52 | |
| 53 | #define LTTNG_LINUX_VERSION_CODE \ |
| 54 | LTTNG_KERNEL_VERSION(LTTNG_LINUX_MAJOR, LTTNG_LINUX_MINOR, LTTNG_LINUX_PATCH) |
| 55 | |
| 56 | #else |
| 57 | |
| 58 | #define LTTNG_KERNEL_VERSION(a, b, c) (KERNEL_VERSION(a, b, c) * 1ULL) |
| 59 | #define LTTNG_LINUX_VERSION_CODE (LINUX_VERSION_CODE * 1ULL) |
| 60 | |
| 61 | #endif |
| 62 | |
| 63 | /* |
| 64 | * This macro checks if the kernel version is between the two specified |
| 65 | * versions (lower limit inclusive, upper limit exclusive). |
| 66 | */ |
| 67 | #define LTTNG_KERNEL_RANGE(a_low, b_low, c_low, a_high, b_high, c_high) \ |
| 68 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \ |
| 69 | LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(a_high, b_high, c_high)) |
| 70 | |
| 71 | /* Ubuntu */ |
| 72 | |
| 73 | #define LTTNG_UBUNTU_KERNEL_VERSION(a, b, c, d) \ |
| 74 | (((LTTNG_KERNEL_VERSION(a, b, c)) << 16) + (d)) |
| 75 | |
| 76 | #ifdef UTS_UBUNTU_RELEASE_ABI |
| 77 | #define LTTNG_UBUNTU_VERSION_CODE \ |
| 78 | ((LTTNG_LINUX_VERSION_CODE << 16) + UTS_UBUNTU_RELEASE_ABI) |
| 79 | #else |
| 80 | #define LTTNG_UBUNTU_VERSION_CODE 0 |
| 81 | #endif |
| 82 | |
| 83 | #define LTTNG_UBUNTU_KERNEL_RANGE(a_low, b_low, c_low, d_low, \ |
| 84 | a_high, b_high, c_high, d_high) \ |
| 85 | (LTTNG_UBUNTU_VERSION_CODE >= \ |
| 86 | LTTNG_UBUNTU_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \ |
| 87 | LTTNG_UBUNTU_VERSION_CODE < \ |
| 88 | LTTNG_UBUNTU_KERNEL_VERSION(a_high, b_high, c_high, d_high)) |
| 89 | |
| 90 | /* Debian */ |
| 91 | |
| 92 | #define LTTNG_DEBIAN_KERNEL_VERSION(a, b, c, d, e) \ |
| 93 | (((LTTNG_KERNEL_VERSION(a, b, c)) * 10000ULL) + ((d) * 100) + (e)) |
| 94 | |
| 95 | #ifdef DEBIAN_API_VERSION |
| 96 | #define LTTNG_DEBIAN_VERSION_CODE \ |
| 97 | ((LTTNG_LINUX_VERSION_CODE * 10000ULL) + DEBIAN_API_VERSION) |
| 98 | #else |
| 99 | #define LTTNG_DEBIAN_VERSION_CODE 0 |
| 100 | #endif |
| 101 | |
| 102 | #define LTTNG_DEBIAN_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, \ |
| 103 | a_high, b_high, c_high, d_high, e_high) \ |
| 104 | (LTTNG_DEBIAN_VERSION_CODE >= \ |
| 105 | LTTNG_DEBIAN_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low) && \ |
| 106 | LTTNG_DEBIAN_VERSION_CODE < \ |
| 107 | LTTNG_DEBIAN_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high)) |
| 108 | |
| 109 | /* RHEL */ |
| 110 | |
| 111 | #define LTTNG_RHEL_KERNEL_VERSION(a, b, c, d, e, f) \ |
| 112 | (((LTTNG_KERNEL_VERSION(a, b, c)) * 100000000ULL) + ((d) * 10000) + ((e) * 100) + (f)) |
| 113 | |
| 114 | #ifdef RHEL_API_VERSION |
| 115 | #define LTTNG_RHEL_VERSION_CODE \ |
| 116 | ((LTTNG_LINUX_VERSION_CODE * 100000000ULL) + RHEL_API_VERSION) |
| 117 | #else |
| 118 | #define LTTNG_RHEL_VERSION_CODE 0 |
| 119 | #endif |
| 120 | |
| 121 | #define LTTNG_RHEL_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \ |
| 122 | a_high, b_high, c_high, d_high, e_high, f_high) \ |
| 123 | (LTTNG_RHEL_VERSION_CODE >= \ |
| 124 | LTTNG_RHEL_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low, f_low) && \ |
| 125 | LTTNG_RHEL_VERSION_CODE < \ |
| 126 | LTTNG_RHEL_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high, f_high)) |
| 127 | |
| 128 | /* SUSE Linux enterprise */ |
| 129 | |
| 130 | /* |
| 131 | * SLE major version codes may be large, eg. 150400, and require more than |
| 132 | * 32 bits to store. Multiplying `a` by `1ULL` avoids compiler warnings, eg: |
| 133 | * |
| 134 | * `warning: result of β150400 << 16β requires 35 bits to represent, but βintβ only has 32 bits` |
| 135 | * |
| 136 | */ |
| 137 | #define LTTNG_SLE_VERSION(a, b, c) \ |
| 138 | ((((a * 1ULL) << 16) + (b << 8) + c) * 1ULL) |
| 139 | |
| 140 | #if defined(SLE_API_VERSION_MAJOR) && defined(SLE_API_VERSION_MINOR) && defined(SLE_API_VERSION_PATCH) |
| 141 | #define LTTNG_SLE_VERSION_CODE \ |
| 142 | (LTTNG_SLE_VERSION(SLE_API_VERSION_MAJOR, SLE_API_VERSION_MINOR, SLE_API_VERSION_PATCH)) |
| 143 | #else |
| 144 | #define LTTNG_SLE_VERSION_CODE 0 |
| 145 | #endif |
| 146 | |
| 147 | #define LTTNG_SLE_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \ |
| 148 | a_high, b_high, c_high, d_high, e_high, f_high) \ |
| 149 | ( \ |
| 150 | LTTNG_SLE_VERSION_CODE != 0 && \ |
| 151 | ( \ |
| 152 | /* Linux kernel version code exclusive inside range */ \ |
| 153 | (LTTNG_LINUX_VERSION_CODE > LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \ |
| 154 | LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(a_high, b_high, c_high)) || \ |
| 155 | \ |
| 156 | /* Linux kernel version code is at lower and upper limit */ \ |
| 157 | (LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \ |
| 158 | LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \ |
| 159 | LTTNG_SLE_VERSION_CODE >= LTTNG_SLE_VERSION(d_low, e_low, f_low) && \ |
| 160 | LTTNG_SLE_VERSION_CODE < LTTNG_SLE_VERSION(d_high, e_high, f_high)) || \ |
| 161 | \ |
| 162 | /* Linux kernel version code is at lower limit */ \ |
| 163 | (LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \ |
| 164 | LTTNG_KERNEL_VERSION(a_low, b_low, c_low) != LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \ |
| 165 | LTTNG_SLE_VERSION_CODE >= LTTNG_SLE_VERSION(d_low, e_low, f_low)) || \ |
| 166 | \ |
| 167 | /* Linux kernel version code is at upper limit */ \ |
| 168 | (LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \ |
| 169 | LTTNG_KERNEL_VERSION(a_low, b_low, c_low) != LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \ |
| 170 | LTTNG_SLE_VERSION_CODE < LTTNG_SLE_VERSION(d_high, e_high, f_high)) \ |
| 171 | )) |
| 172 | |
| 173 | /* Fedora */ |
| 174 | |
| 175 | #define LTTNG_FEDORA_KERNEL_VERSION(a, b, c, d) \ |
| 176 | (((LTTNG_KERNEL_VERSION(a, b, c)) * 10000ULL) + (d)) |
| 177 | |
| 178 | #ifdef FEDORA_REVISION_VERSION |
| 179 | #define LTTNG_FEDORA_VERSION_CODE \ |
| 180 | ((LTTNG_LINUX_VERSION_CODE * 10000ULL) + FEDORA_REVISION_VERSION) |
| 181 | #else |
| 182 | #define LTTNG_FEDORA_VERSION_CODE 0 |
| 183 | #endif |
| 184 | |
| 185 | #define LTTNG_FEDORA_KERNEL_RANGE(a_low, b_low, c_low, d_low, \ |
| 186 | a_high, b_high, c_high, d_high) \ |
| 187 | (LTTNG_FEDORA_VERSION_CODE >= \ |
| 188 | LTTNG_FEDORA_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \ |
| 189 | LTTNG_FEDORA_VERSION_CODE < \ |
| 190 | LTTNG_FEDORA_KERNEL_VERSION(a_high, b_high, c_high, d_high)) |
| 191 | |
| 192 | /* RT patch */ |
| 193 | |
| 194 | #define LTTNG_RT_KERNEL_VERSION(a, b, c, d) \ |
| 195 | (((LTTNG_KERNEL_VERSION(a, b, c)) << 16) + (d)) |
| 196 | |
| 197 | #ifdef RT_PATCH_VERSION |
| 198 | #define LTTNG_RT_VERSION_CODE \ |
| 199 | ((LTTNG_LINUX_VERSION_CODE << 16) + RT_PATCH_VERSION) |
| 200 | #else |
| 201 | #define LTTNG_RT_VERSION_CODE 0 |
| 202 | #endif |
| 203 | |
| 204 | #define LTTNG_RT_KERNEL_RANGE(a_low, b_low, c_low, d_low, \ |
| 205 | a_high, b_high, c_high, d_high) \ |
| 206 | (LTTNG_RT_VERSION_CODE >= \ |
| 207 | LTTNG_RT_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \ |
| 208 | LTTNG_RT_VERSION_CODE < \ |
| 209 | LTTNG_RT_KERNEL_VERSION(a_high, b_high, c_high, d_high)) |
| 210 | |
| 211 | #endif /* _LTTNG_KERNEL_VERSION_H */ |