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mirror_zfs/include/spl/sys/sysmacros.h
Brian Behlendorf 93ce2b4ca5 Update build system and packaging 
Minimal changes required to integrate the SPL sources in to the
ZFS repository build infrastructure and packaging.

Build system and packaging:
  * Renamed SPL_* autoconf m4 macros to ZFS_*.
  * Removed redundant SPL_* autoconf m4 macros.
  * Updated the RPM spec files to remove SPL package dependency.
  * The zfs package obsoletes the spl package, and the zfs-kmod
    package obsoletes the spl-kmod package.
  * The zfs-kmod-devel* packages were updated to add compatibility
    symlinks under /usr/src/spl-x.y.z until all dependent packages
    can be updated.  They will be removed in a future release.
  * Updated copy-builtin script for in-kernel builds.
  * Updated DKMS package to include the spl.ko.
  * Updated stale AUTHORS file to include all contributors.
  * Updated stale COPYRIGHT and included the SPL as an exception.
  * Renamed README.markdown to README.md
  * Renamed OPENSOLARIS.LICENSE to LICENSE.
  * Renamed DISCLAIMER to NOTICE.

Required code changes:
  * Removed redundant HAVE_SPL macro.
  * Removed _BOOT from nvpairs since it doesn't apply for Linux.
  * Initial header cleanup (removal of empty headers, refactoring).
  * Remove SPL repository clone/build from zimport.sh.
  * Use of DEFINE_RATELIMIT_STATE and DEFINE_SPINLOCK removed due
    to build issues when forcing C99 compilation.
  * Replaced legacy ACCESS_ONCE with READ_ONCE.
  * Include needed headers for `current` and `EXPORT_SYMBOL`.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Pavel Zakharov <pavel.zakharov@delphix.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
TEST_ZIMPORT_SKIP="yes"
Closes #7556
2018-05-29 16:00:33 -07:00

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/*
* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
* Copyright (C) 2007 The Regents of the University of California.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
* UCRL-CODE-235197
*
* This file is part of the SPL, Solaris Porting Layer.
* For details, see <http://zfsonlinux.org/>.
*
* The SPL is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* The SPL is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _SPL_SYSMACROS_H
#define _SPL_SYSMACROS_H
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/cpumask.h>
#include <sys/debug.h>
#include <sys/zone.h>
#include <sys/signal.h>
#include <asm/page.h>
#ifdef HAVE_SCHED_RT_HEADER
#include <linux/sched/rt.h>
#endif
#ifndef _KERNEL
#define _KERNEL __KERNEL__
#endif
#define FALSE 0
#define TRUE 1
#define INT8_MAX (127)
#define INT8_MIN (-128)
#define UINT8_MAX (255)
#define UINT8_MIN (0)
#define INT16_MAX (32767)
#define INT16_MIN (-32768)
#define UINT16_MAX (65535)
#define UINT16_MIN (0)
#define INT32_MAX INT_MAX
#define INT32_MIN INT_MIN
#define UINT32_MAX UINT_MAX
#define UINT32_MIN UINT_MIN
#define INT64_MAX LLONG_MAX
#define INT64_MIN LLONG_MIN
#define UINT64_MAX ULLONG_MAX
#define UINT64_MIN ULLONG_MIN
#define NBBY 8
#define MAXMSGLEN 256
#define MAXNAMELEN 256
#define MAXPATHLEN 4096
#define MAXOFFSET_T LLONG_MAX
#define MAXBSIZE 8192
#define DEV_BSIZE 512
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define proc_pageout NULL
#define curproc current
#define max_ncpus num_possible_cpus()
#define boot_ncpus num_online_cpus()
#define CPU_SEQID smp_processor_id()
#define is_system_labeled() 0
#ifndef RLIM64_INFINITY
#define RLIM64_INFINITY (~0ULL)
#endif
/*
* 0..MAX_PRIO-1: Process priority
* 0..MAX_RT_PRIO-1: RT priority tasks
* MAX_RT_PRIO..MAX_PRIO-1: SCHED_NORMAL tasks
*
* Treat shim tasks as SCHED_NORMAL tasks
*/
#define minclsyspri (MAX_PRIO-1)
#define maxclsyspri (MAX_RT_PRIO)
#define defclsyspri (DEFAULT_PRIO)
#ifndef NICE_TO_PRIO
#define NICE_TO_PRIO(nice) (MAX_RT_PRIO + (nice) + 20)
#endif
#ifndef PRIO_TO_NICE
#define PRIO_TO_NICE(prio) ((prio) - MAX_RT_PRIO - 20)
#endif
/*
* Missing macros
*/
#ifndef PAGESIZE
#define PAGESIZE PAGE_SIZE
#endif
#ifndef PAGESHIFT
#define PAGESHIFT PAGE_SHIFT
#endif
/* Dtrace probes do not exist in the linux kernel */
#ifdef DTRACE_PROBE
#undef DTRACE_PROBE
#endif /* DTRACE_PROBE */
#define DTRACE_PROBE(a) ((void)0)
#ifdef DTRACE_PROBE1
#undef DTRACE_PROBE1
#endif /* DTRACE_PROBE1 */
#define DTRACE_PROBE1(a, b, c) ((void)0)
#ifdef DTRACE_PROBE2
#undef DTRACE_PROBE2
#endif /* DTRACE_PROBE2 */
#define DTRACE_PROBE2(a, b, c, d, e) ((void)0)
#ifdef DTRACE_PROBE3
#undef DTRACE_PROBE3
#endif /* DTRACE_PROBE3 */
#define DTRACE_PROBE3(a, b, c, d, e, f, g) ((void)0)
#ifdef DTRACE_PROBE4
#undef DTRACE_PROBE4
#endif /* DTRACE_PROBE4 */
#define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) ((void)0)
/* Missing globals */
extern char spl_version[32];
extern unsigned long spl_hostid;
/* Missing misc functions */
extern uint32_t zone_get_hostid(void *zone);
extern void spl_setup(void);
extern void spl_cleanup(void);
#define highbit(x) __fls(x)
#define lowbit(x) __ffs(x)
#define highbit64(x) fls64(x)
#define makedevice(maj, min) makedev(maj, min)
/* common macros */
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a, b) ((a) < (b) ? (b) : (a))
#endif
#ifndef ABS
#define ABS(a) ((a) < 0 ? -(a) : (a))
#endif
#ifndef DIV_ROUND_UP
#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
#endif
#ifndef roundup
#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
#endif
#ifndef howmany
#define howmany(x, y) (((x) + ((y) - 1)) / (y))
#endif
/*
* Compatibility macros/typedefs needed for Solaris -> Linux port
*/
#define P2ALIGN(x, align) ((x) & -(align))
#define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1)
#define P2ROUNDUP(x, align) ((((x) - 1) | ((align) - 1)) + 1)
#define P2PHASE(x, align) ((x) & ((align) - 1))
#define P2NPHASE(x, align) (-(x) & ((align) - 1))
#define ISP2(x) (((x) & ((x) - 1)) == 0)
#define IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
#define P2BOUNDARY(off, len, align) \
(((off) ^ ((off) + (len) - 1)) > (align) - 1)
/*
* Typed version of the P2* macros. These macros should be used to ensure
* that the result is correctly calculated based on the data type of (x),
* which is passed in as the last argument, regardless of the data
* type of the alignment. For example, if (x) is of type uint64_t,
* and we want to round it up to a page boundary using "PAGESIZE" as
* the alignment, we can do either
*
* P2ROUNDUP(x, (uint64_t)PAGESIZE)
* or
* P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
*/
#define P2ALIGN_TYPED(x, align, type) \
((type)(x) & -(type)(align))
#define P2PHASE_TYPED(x, align, type) \
((type)(x) & ((type)(align) - 1))
#define P2NPHASE_TYPED(x, align, type) \
(-(type)(x) & ((type)(align) - 1))
#define P2ROUNDUP_TYPED(x, align, type) \
((((type)(x) - 1) | ((type)(align) - 1)) + 1)
#define P2END_TYPED(x, align, type) \
(-(~(type)(x) & -(type)(align)))
#define P2PHASEUP_TYPED(x, align, phase, type) \
((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
#define P2CROSS_TYPED(x, y, align, type) \
(((type)(x) ^ (type)(y)) > (type)(align) - 1)
#define P2SAMEHIGHBIT_TYPED(x, y, type) \
(((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
#if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof)
/* avoid any possibility of clashing with <stddef.h> version */
#define offsetof(s, m) ((size_t)(&(((s *)0)->m)))
#endif
#endif /* _SPL_SYSMACROS_H */
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