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
  28 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
  29 #include <generated/utsrelease.h>
  30 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) */
  31 #include <linux/utsrelease.h>
  32 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) */
  33
  34 /*
  35  * This macro checks if the kernel version is between the two specified
  36  * versions (lower limit inclusive, upper limit exclusive).
  37  */
  38 #define LTTNG_KERNEL_RANGE(a_low, b_low, c_low, a_high, b_high, c_high) \
  39         (LINUX_VERSION_CODE >= KERNEL_VERSION(a_low, b_low, c_low) && \
  40          LINUX_VERSION_CODE < KERNEL_VERSION(a_high, b_high, c_high))
  41
  42 #define LTTNG_UBUNTU_KERNEL_VERSION(a, b, c, d) \
  43         (((a) << 24) + ((b) << 16) + (c << 8) + (d))
  44
  45 #define LTTNG_UBUNTU_VERSION_CODE \
  46         ((LINUX_VERSION_CODE << 8) + UTS_UBUNTU_RELEASE_ABI)
  47
  48 #define LTTNG_UBUNTU_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
  49                 a_high, b_high, c_high, d_high) \
  50         (defined(UTS_UBUNTU_RELEASE_ABI) && \
  51                 LTTNG_UBUNTU_VERSION_CODE >= \
  52                 LTTNG_UBUNTU_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
  53                 LTTNG_UBUNTU_VERSION_CODE < \
  54                 LTTNG_UBUNTU_KERNEL_VERSION(a_high, b_high, c_high, d_high))
  55
  56 #define LTTNG_DEBIAN_KERNEL_VERSION(a, b, c, d, e, f) \
  57         (((((a) << 16) + ((b) << 8) + (c)) * 1000000ULL) + ((d) * 10000) + ((e) * 100) + (f))
  58
  59 #define LTTNG_DEBIAN_VERSION_CODE \
  60         ((LINUX_VERSION_CODE * 1000000ULL) + DEBIAN_API_VERSION)
  61
  62 #define LTTNG_DEBIAN_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
  63                 a_high, b_high, c_high, d_high, e_high, f_high) \
  64         (defined(DEBIAN_API_VERSION) && \
  65                 LTTNG_DEBIAN_VERSION_CODE >= \
  66                 LTTNG_DEBIAN_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low, f_low) && \
  67                 LTTNG_DEBIAN_VERSION_CODE < \
  68                 LTTNG_DEBIAN_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high, f_high))
  69
  70 #endif /* _LTTNG_KERNEL_VERSION_H */