lttng-kernel-version.h

   1 #ifndef _LTTNG_KERNEL_VERSION_H
   2 #define _LTTNG_KERNEL_VERSION_H
   3
   4 /*
   5  * lttng-kernel-version.h
   6  *
   7  * Contains helpers to check more complex kernel version conditions.
   8  *
   9  * Copyright (C) 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; only
  14  * version 2.1 of the License.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  24  */
  25
  26 #include <linux/version.h>
  27 #include <linux/vermagic.h>
  28
  29 /*
  30  * This macro checks if the kernel version is between the two specified
  31  * versions (lower limit inclusive, upper limit exclusive).
  32  */
  33 #define LTTNG_KERNEL_RANGE(a_low, b_low, c_low, a_high, b_high, c_high) \
  34         (LINUX_VERSION_CODE >= KERNEL_VERSION(a_low, b_low, c_low) && \
  35          LINUX_VERSION_CODE < KERNEL_VERSION(a_high, b_high, c_high))
  36
  37 #define LTTNG_UBUNTU_KERNEL_VERSION(a, b, c, d) \
  38         (((a) << 24) + ((b) << 16) + ((c) << 8) + (d))
  39
  40 #define LTTNG_UBUNTU_VERSION_CODE \
  41         ((LINUX_VERSION_CODE << 8) + UTS_UBUNTU_RELEASE_ABI)
  42
  43 #define LTTNG_UBUNTU_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
  44                 a_high, b_high, c_high, d_high) \
  45         (defined(UTS_UBUNTU_RELEASE_ABI) && \
  46                 LTTNG_UBUNTU_VERSION_CODE >= \
  47                 LTTNG_UBUNTU_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
  48                 LTTNG_UBUNTU_VERSION_CODE < \
  49                 LTTNG_UBUNTU_KERNEL_VERSION(a_high, b_high, c_high, d_high))
  50
  51 #define LTTNG_RHEL_KERNEL_VERSION(a, b, c, d, e) \
  52         (((a) * (1ULL << 32)) + ((b) << 24) + ((c) << 16) + ((d) << 8) + (e))
  53
  54 #ifdef RHEL_RELEASE_CODE
  55 #define LTTNG_RHEL_VERSION_CODE \
  56         ((LINUX_VERSION_CODE * (1ULL << 16)) + RHEL_RELEASE_CODE)
  57 #else
  58 #define LTTNG_RHEL_VERSION_CODE         0
  59 #endif
  60
  61 #define LTTNG_RHEL_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, \
  62                 a_high, b_high, c_high, d_high, e_high) \
  63         (LTTNG_RHEL_VERSION_CODE >= \
  64                 LTTNG_RHEL_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low) && \
  65                 LTTNG_RHEL_VERSION_CODE < \
  66                 LTTNG_RHEL_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high))
  67
  68 #endif /* _LTTNG_KERNEL_VERSION_H */