[lttng-modules.git] / lttng-kernel-version.h

/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
 *
 * lttng-kernel-version.h
 *
 * Contains helpers to check kernel version conditions.
 *
 * Copyright (C) 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _LTTNG_KERNEL_VERSION_H
#define _LTTNG_KERNEL_VERSION_H

#include <linux/version.h>
#include <generated/utsrelease.h>

/*
 * The following defines are extracted from the toplevel Linux Makefile and
 * passed on the command line -with '-D'.
 */

#ifndef LTTNG_LINUX_MAJOR
#define LTTNG_LINUX_MAJOR 0
#endif

#ifndef LTTNG_LINUX_MINOR
#define LTTNG_LINUX_MINOR 0
#endif

#ifndef LTTNG_LINUX_PATCH
#define LTTNG_LINUX_PATCH 0
#endif

/*
 * Some stable releases have overflowed the 8bits allocated to the sublevel in
 * the version code. To determine if the current kernel is affected, use the
 * sublevel version from the Makefile. This is currently true for the 4.4.256
 * and 4.9.256 stable releases.
 *
 * When the sublevel has overflowed, use the values from the Makefile instead
 * of LINUX_VERSION_CODE from the kernel headers and allocate 16bits.
 * Otherwise, keep using the version code from the headers to minimise the
 * behavior change and avoid regressions.
 *
 * Cast the result to uint64_t to prevent overflowing when we append distro
 * specific version information.
 */
#if (LTTNG_LINUX_PATCH >= 256)

#define LTTNG_KERNEL_VERSION(a, b, c) \
	((((a) << 24) + ((b) << 16) + (c)) * 1ULL)

#define LTTNG_LINUX_VERSION_CODE \
	LTTNG_KERNEL_VERSION(LTTNG_LINUX_MAJOR, LTTNG_LINUX_MINOR, LTTNG_LINUX_PATCH)

#else

#define LTTNG_KERNEL_VERSION(a, b, c) (KERNEL_VERSION(a, b, c) * 1ULL)
#define LTTNG_LINUX_VERSION_CODE (LINUX_VERSION_CODE * 1ULL)

#endif

/*
 * This macro checks if the kernel version is between the two specified
 * versions (lower limit inclusive, upper limit exclusive).
 */
#define LTTNG_KERNEL_RANGE(a_low, b_low, c_low, a_high, b_high, c_high) \
	(LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \
	 LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(a_high, b_high, c_high))

/* Ubuntu */

#define LTTNG_UBUNTU_KERNEL_VERSION(a, b, c, d) \
	(((LTTNG_KERNEL_VERSION(a, b, c)) << 16) + (d))

#ifdef UTS_UBUNTU_RELEASE_ABI
#define LTTNG_UBUNTU_VERSION_CODE \
	((LTTNG_LINUX_VERSION_CODE << 16) + UTS_UBUNTU_RELEASE_ABI)
#else
#define LTTNG_UBUNTU_VERSION_CODE 	0
#endif

#define LTTNG_UBUNTU_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
		a_high, b_high, c_high, d_high) \
	(LTTNG_UBUNTU_VERSION_CODE >= \
		LTTNG_UBUNTU_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
		LTTNG_UBUNTU_VERSION_CODE < \
		LTTNG_UBUNTU_KERNEL_VERSION(a_high, b_high, c_high, d_high))

/* Debian */

#define LTTNG_DEBIAN_KERNEL_VERSION(a, b, c, d, e, f) \
	(((LTTNG_KERNEL_VERSION(a, b, c)) * 1000000ULL) + ((d) * 10000) + ((e) * 100) + (f))

#ifdef DEBIAN_API_VERSION
#define LTTNG_DEBIAN_VERSION_CODE \
	((LTTNG_LINUX_VERSION_CODE * 1000000ULL) + DEBIAN_API_VERSION)
#else
#define LTTNG_DEBIAN_VERSION_CODE	0
#endif

#define LTTNG_DEBIAN_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
		a_high, b_high, c_high, d_high, e_high, f_high) \
	(LTTNG_DEBIAN_VERSION_CODE >= \
		LTTNG_DEBIAN_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low, f_low) && \
		LTTNG_DEBIAN_VERSION_CODE < \
		LTTNG_DEBIAN_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high, f_high))

#define LTTNG_RHEL_KERNEL_VERSION(a, b, c, d, e, f) \
	(((LTTNG_KERNEL_VERSION(a, b, c)) * 100000000ULL) + ((d) * 10000) + ((e) * 100) + (f))

/* RHEL */

#ifdef RHEL_API_VERSION
#define LTTNG_RHEL_VERSION_CODE \
	((LTTNG_LINUX_VERSION_CODE * 100000000ULL) + RHEL_API_VERSION)
#else
#define LTTNG_RHEL_VERSION_CODE		0
#endif

#define LTTNG_RHEL_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
		a_high, b_high, c_high, d_high, e_high, f_high) \
	(LTTNG_RHEL_VERSION_CODE >= \
		LTTNG_RHEL_KERNEL_VERSION(a_low, b_low, c_low, d_low, e_low, f_low) && \
		LTTNG_RHEL_VERSION_CODE < \
		LTTNG_RHEL_KERNEL_VERSION(a_high, b_high, c_high, d_high, e_high, f_high))

/* SUSE Linux enterprise */

/*
 * SLE major version codes may be large, eg. 150400, and require more than
 * 32 bits to store. Multiplying `a` by `1ULL` avoids compiler warnings, eg:
 *
 * `warning: result of ‘150400 << 16’ requires 35 bits to represent, but ‘int’ only has 32 bits`
 *
 */
#define LTTNG_SLE_VERSION(a, b, c) \
   ((((a * 1ULL) << 16) + (b << 8) + c) * 1ULL)

#if defined(SLE_API_VERSION_MAJOR) && defined(SLE_API_VERSION_MINOR) && defined(SLE_API_VERSION_PATCH)
#define LTTNG_SLE_VERSION_CODE \
	(LTTNG_SLE_VERSION(SLE_API_VERSION_MAJOR, SLE_API_VERSION_MINOR, SLE_API_VERSION_PATCH))
#else
#define LTTNG_SLE_VERSION_CODE	0
#endif

#define LTTNG_SLE_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
		a_high, b_high, c_high, d_high, e_high, f_high) \
	( \
		LTTNG_SLE_VERSION_CODE != 0 && \
		( \
			/* Linux kernel version code exclusive inside range */ \
			(LTTNG_LINUX_VERSION_CODE > LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \
			LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(a_high, b_high, c_high)) || \
			\
			/* Linux kernel version code is at lower and upper limit */ \
			(LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \
			LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \
			LTTNG_SLE_VERSION_CODE >= LTTNG_SLE_VERSION(d_low, e_low, f_low) && \
			LTTNG_SLE_VERSION_CODE < LTTNG_SLE_VERSION(d_high, e_high, f_high)) || \
			\
			/* Linux kernel version code is at lower limit */ \
			(LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \
			LTTNG_KERNEL_VERSION(a_low, b_low, c_low) != LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \
			LTTNG_SLE_VERSION_CODE >= LTTNG_SLE_VERSION(d_low, e_low, f_low)) || \
			\
			/* Linux kernel version code is at upper limit */ \
			(LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \
			LTTNG_KERNEL_VERSION(a_low, b_low, c_low) != LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \
			LTTNG_SLE_VERSION_CODE < LTTNG_SLE_VERSION(d_high, e_high, f_high)) \
		))

/* Fedora */

#define LTTNG_FEDORA_KERNEL_VERSION(a, b, c, d) \
        (((LTTNG_KERNEL_VERSION(a, b, c)) * 10000ULL) + (d))

#ifdef FEDORA_REVISION_VERSION
#define LTTNG_FEDORA_VERSION_CODE \
        ((LTTNG_LINUX_VERSION_CODE * 10000ULL) + FEDORA_REVISION_VERSION)
#else
#define LTTNG_FEDORA_VERSION_CODE         0
#endif

#define LTTNG_FEDORA_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
                a_high, b_high, c_high, d_high) \
        (LTTNG_FEDORA_VERSION_CODE >= \
                LTTNG_FEDORA_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
                LTTNG_FEDORA_VERSION_CODE < \
                LTTNG_FEDORA_KERNEL_VERSION(a_high, b_high, c_high, d_high))

/* RT patch */

#define LTTNG_RT_KERNEL_VERSION(a, b, c, d) \
	(((LTTNG_KERNEL_VERSION(a, b, c)) << 16) + (d))

#ifdef RT_PATCH_VERSION
#define LTTNG_RT_VERSION_CODE \
	((LTTNG_LINUX_VERSION_CODE << 16) + RT_PATCH_VERSION)
#else
#define LTTNG_RT_VERSION_CODE 	0
#endif

#define LTTNG_RT_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
		a_high, b_high, c_high, d_high) \
	(LTTNG_RT_VERSION_CODE >= \
		LTTNG_RT_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
		LTTNG_RT_VERSION_CODE < \
		LTTNG_RT_KERNEL_VERSION(a_high, b_high, c_high, d_high))

#endif /* _LTTNG_KERNEL_VERSION_H */
Commit	Line	Data
	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	#include <generated/utsrelease.h>
	15
	16	/*
	17	* The following defines are extracted from the toplevel Linux Makefile and
	18	* passed on the command line -with '-D'.
	19	*/
	20
	21	#ifndef LTTNG_LINUX_MAJOR
	22	#define LTTNG_LINUX_MAJOR 0
	23	#endif
	24
	25	#ifndef LTTNG_LINUX_MINOR
	26	#define LTTNG_LINUX_MINOR 0
	27	#endif
	28
	29	#ifndef LTTNG_LINUX_PATCH
	30	#define LTTNG_LINUX_PATCH 0
	31	#endif
	32
	33	/*
	34	* Some stable releases have overflowed the 8bits allocated to the sublevel in
	35	* the version code. To determine if the current kernel is affected, use the
	36	* sublevel version from the Makefile. This is currently true for the 4.4.256
	37	* and 4.9.256 stable releases.
	38	*
	39	* When the sublevel has overflowed, use the values from the Makefile instead
	40	* of LINUX_VERSION_CODE from the kernel headers and allocate 16bits.
	41	* Otherwise, keep using the version code from the headers to minimise the
	42	* behavior change and avoid regressions.
	43	*
	44	* Cast the result to uint64_t to prevent overflowing when we append distro
	45	* specific version information.
	46	*/
	47	#if (LTTNG_LINUX_PATCH >= 256)
	48
	49	#define LTTNG_KERNEL_VERSION(a, b, c) \
	50	((((a) << 24) + ((b) << 16) + (c)) * 1ULL)
	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) * 1ULL)
	58	#define LTTNG_LINUX_VERSION_CODE (LINUX_VERSION_CODE * 1ULL)
	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)) << 16) + (d))
	74
	75	#ifdef UTS_UBUNTU_RELEASE_ABI
	76	#define LTTNG_UBUNTU_VERSION_CODE \
	77	((LTTNG_LINUX_VERSION_CODE << 16) + 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	#define LTTNG_RHEL_KERNEL_VERSION(a, b, c, d, e, f) \
	109	(((LTTNG_KERNEL_VERSION(a, b, c)) * 100000000ULL) + ((d) * 10000) + ((e) * 100) + (f))
	110
	111	/* RHEL */
	112
	113	#ifdef RHEL_API_VERSION
	114	#define LTTNG_RHEL_VERSION_CODE \
	115	((LTTNG_LINUX_VERSION_CODE * 100000000ULL) + 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	/*
	130	* SLE major version codes may be large, eg. 150400, and require more than
	131	* 32 bits to store. Multiplying `a` by `1ULL` avoids compiler warnings, eg:
	132	*
	133	* `warning: result of ‘150400 << 16’ requires 35 bits to represent, but ‘int’ only has 32 bits`
	134	*
	135	*/
	136	#define LTTNG_SLE_VERSION(a, b, c) \
	137	((((a * 1ULL) << 16) + (b << 8) + c) * 1ULL)
	138
	139	#if defined(SLE_API_VERSION_MAJOR) && defined(SLE_API_VERSION_MINOR) && defined(SLE_API_VERSION_PATCH)
	140	#define LTTNG_SLE_VERSION_CODE \
	141	(LTTNG_SLE_VERSION(SLE_API_VERSION_MAJOR, SLE_API_VERSION_MINOR, SLE_API_VERSION_PATCH))
	142	#else
	143	#define LTTNG_SLE_VERSION_CODE 0
	144	#endif
	145
	146	#define LTTNG_SLE_KERNEL_RANGE(a_low, b_low, c_low, d_low, e_low, f_low, \
	147	a_high, b_high, c_high, d_high, e_high, f_high) \
	148	( \
	149	LTTNG_SLE_VERSION_CODE != 0 && \
	150	( \
	151	/* Linux kernel version code exclusive inside range */ \
	152	(LTTNG_LINUX_VERSION_CODE > LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \
	153	LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(a_high, b_high, c_high)) \|\| \
	154	\
	155	/* Linux kernel version code is at lower and upper limit */ \
	156	(LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \
	157	LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \
	158	LTTNG_SLE_VERSION_CODE >= LTTNG_SLE_VERSION(d_low, e_low, f_low) && \
	159	LTTNG_SLE_VERSION_CODE < LTTNG_SLE_VERSION(d_high, e_high, f_high)) \|\| \
	160	\
	161	/* Linux kernel version code is at lower limit */ \
	162	(LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_low, b_low, c_low) && \
	163	LTTNG_KERNEL_VERSION(a_low, b_low, c_low) != LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \
	164	LTTNG_SLE_VERSION_CODE >= LTTNG_SLE_VERSION(d_low, e_low, f_low)) \|\| \
	165	\
	166	/* Linux kernel version code is at upper limit */ \
	167	(LTTNG_LINUX_VERSION_CODE == LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \
	168	LTTNG_KERNEL_VERSION(a_low, b_low, c_low) != LTTNG_KERNEL_VERSION(a_high, b_high, c_high) && \
	169	LTTNG_SLE_VERSION_CODE < LTTNG_SLE_VERSION(d_high, e_high, f_high)) \
	170	))
	171
	172	/* Fedora */
	173
	174	#define LTTNG_FEDORA_KERNEL_VERSION(a, b, c, d) \
	175	(((LTTNG_KERNEL_VERSION(a, b, c)) * 10000ULL) + (d))
	176
	177	#ifdef FEDORA_REVISION_VERSION
	178	#define LTTNG_FEDORA_VERSION_CODE \
	179	((LTTNG_LINUX_VERSION_CODE * 10000ULL) + FEDORA_REVISION_VERSION)
	180	#else
	181	#define LTTNG_FEDORA_VERSION_CODE 0
	182	#endif
	183
	184	#define LTTNG_FEDORA_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
	185	a_high, b_high, c_high, d_high) \
	186	(LTTNG_FEDORA_VERSION_CODE >= \
	187	LTTNG_FEDORA_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
	188	LTTNG_FEDORA_VERSION_CODE < \
	189	LTTNG_FEDORA_KERNEL_VERSION(a_high, b_high, c_high, d_high))
	190
	191	/* RT patch */
	192
	193	#define LTTNG_RT_KERNEL_VERSION(a, b, c, d) \
	194	(((LTTNG_KERNEL_VERSION(a, b, c)) << 16) + (d))
	195
	196	#ifdef RT_PATCH_VERSION
	197	#define LTTNG_RT_VERSION_CODE \
	198	((LTTNG_LINUX_VERSION_CODE << 16) + RT_PATCH_VERSION)
	199	#else
	200	#define LTTNG_RT_VERSION_CODE 0
	201	#endif
	202
	203	#define LTTNG_RT_KERNEL_RANGE(a_low, b_low, c_low, d_low, \
	204	a_high, b_high, c_high, d_high) \
	205	(LTTNG_RT_VERSION_CODE >= \
	206	LTTNG_RT_KERNEL_VERSION(a_low, b_low, c_low, d_low) && \
	207	LTTNG_RT_VERSION_CODE < \
	208	LTTNG_RT_KERNEL_VERSION(a_high, b_high, c_high, d_high))
	209
	210	#endif /* _LTTNG_KERNEL_VERSION_H */