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1 | /*****************************************************************************\ |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
6 | * UCRL-CODE-235197 | |
7 | * | |
8 | * This file is part of the SPL, Solaris Porting Layer. | |
9 | * For details, see <http://zfsonlinux.org/>. | |
10 | * | |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT | |
17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. | |
23 | \*****************************************************************************/ | |
24 | ||
25 | #ifndef _SPL_SYSMACROS_H | |
26 | #define _SPL_SYSMACROS_H | |
27 | ||
28 | #include <linux/module.h> | |
29 | #include <linux/sched.h> | |
30 | #include <linux/cpumask.h> | |
31 | #include <sys/debug.h> | |
32 | #include <sys/varargs.h> | |
33 | #include <sys/zone.h> | |
34 | #include <sys/signal.h> | |
35 | ||
36 | #ifdef HAVE_SCHED_RT_HEADER | |
37 | #include <linux/sched/rt.h> | |
38 | #endif | |
39 | ||
40 | #ifndef _KERNEL | |
41 | #define _KERNEL __KERNEL__ | |
42 | #endif | |
43 | ||
44 | #define FALSE 0 | |
45 | #define TRUE 1 | |
46 | ||
47 | #define INT8_MAX (127) | |
48 | #define INT8_MIN (-128) | |
49 | #define UINT8_MAX (255) | |
50 | #define UINT8_MIN (0) | |
51 | ||
52 | #define INT16_MAX (32767) | |
53 | #define INT16_MIN (-32768) | |
54 | #define UINT16_MAX (65535) | |
55 | #define UINT16_MIN (0) | |
56 | ||
57 | #define INT32_MAX INT_MAX | |
58 | #define INT32_MIN INT_MIN | |
59 | #define UINT32_MAX UINT_MAX | |
60 | #define UINT32_MIN UINT_MIN | |
61 | ||
62 | #define INT64_MAX LLONG_MAX | |
63 | #define INT64_MIN LLONG_MIN | |
64 | #define UINT64_MAX ULLONG_MAX | |
65 | #define UINT64_MIN ULLONG_MIN | |
66 | ||
67 | #define NBBY 8 | |
68 | #define ENOTSUP EOPNOTSUPP | |
69 | ||
70 | #define MAXMSGLEN 256 | |
71 | #define MAXNAMELEN 256 | |
72 | #define MAXPATHLEN PATH_MAX | |
73 | #define MAXOFFSET_T LLONG_MAX | |
74 | #define MAXBSIZE 8192 | |
75 | #define DEV_BSIZE 512 | |
76 | #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ | |
77 | ||
78 | #define proc_pageout NULL | |
79 | #define curproc current | |
80 | #define max_ncpus num_possible_cpus() | |
81 | #define boot_ncpus num_online_cpus() | |
82 | #define CPU_SEQID smp_processor_id() | |
83 | #define _NOTE(x) | |
84 | #define is_system_labeled() 0 | |
85 | ||
86 | #ifndef RLIM64_INFINITY | |
87 | #define RLIM64_INFINITY (~0ULL) | |
88 | #endif | |
89 | ||
90 | /* 0..MAX_PRIO-1: Process priority | |
91 | * 0..MAX_RT_PRIO-1: RT priority tasks | |
92 | * MAX_RT_PRIO..MAX_PRIO-1: SCHED_NORMAL tasks | |
93 | * | |
94 | * Treat shim tasks as SCHED_NORMAL tasks | |
95 | */ | |
96 | #define minclsyspri (MAX_PRIO-1) | |
97 | #define maxclsyspri (MAX_RT_PRIO) | |
98 | #define defclsyspri (DEFAULT_PRIO) | |
99 | ||
100 | #ifndef NICE_TO_PRIO | |
101 | #define NICE_TO_PRIO(nice) (MAX_RT_PRIO + (nice) + 20) | |
102 | #endif | |
103 | #ifndef PRIO_TO_NICE | |
104 | #define PRIO_TO_NICE(prio) ((prio) - MAX_RT_PRIO - 20) | |
105 | #endif | |
106 | ||
107 | /* | |
108 | * Missing macros | |
109 | */ | |
110 | #ifndef PAGESIZE | |
111 | #define PAGESIZE PAGE_SIZE | |
112 | #endif | |
113 | ||
114 | /* from Solaris sys/byteorder.h */ | |
115 | #define BSWAP_8(x) ((x) & 0xff) | |
116 | #define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8)) | |
117 | #define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16)) | |
118 | #define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32)) | |
119 | ||
120 | /* Map some simple functions. | |
121 | */ | |
122 | #define bzero(ptr,size) memset(ptr,0,size) | |
123 | #define bcopy(src,dest,size) memmove(dest,src,size) | |
124 | #define bcmp(src,dest,size) memcmp((src), (dest), (size_t)(size)) | |
125 | ||
126 | /* Dtrace probes do not exist in the linux kernel */ | |
127 | #ifdef DTRACE_PROBE | |
128 | #undef DTRACE_PROBE | |
129 | #endif /* DTRACE_PROBE */ | |
130 | #define DTRACE_PROBE(a) ((void)0) | |
131 | ||
132 | #ifdef DTRACE_PROBE1 | |
133 | #undef DTRACE_PROBE1 | |
134 | #endif /* DTRACE_PROBE1 */ | |
135 | #define DTRACE_PROBE1(a, b, c) ((void)0) | |
136 | ||
137 | #ifdef DTRACE_PROBE2 | |
138 | #undef DTRACE_PROBE2 | |
139 | #endif /* DTRACE_PROBE2 */ | |
140 | #define DTRACE_PROBE2(a, b, c, d, e) ((void)0) | |
141 | ||
142 | #ifdef DTRACE_PROBE3 | |
143 | #undef DTRACE_PROBE3 | |
144 | #endif /* DTRACE_PROBE3 */ | |
145 | #define DTRACE_PROBE3(a, b, c, d, e, f, g) ((void)0) | |
146 | ||
147 | #ifdef DTRACE_PROBE4 | |
148 | #undef DTRACE_PROBE4 | |
149 | #endif /* DTRACE_PROBE4 */ | |
150 | #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) ((void)0) | |
151 | ||
152 | /* Missing globals */ | |
153 | extern char spl_version[32]; | |
154 | extern unsigned long spl_hostid; | |
155 | ||
156 | /* Missing misc functions */ | |
157 | extern uint32_t zone_get_hostid(void *zone); | |
158 | extern void spl_setup(void); | |
159 | extern void spl_cleanup(void); | |
160 | ||
161 | #define highbit64(x) fls64(x) | |
162 | #define makedevice(maj,min) makedev(maj,min) | |
163 | ||
164 | /* common macros */ | |
165 | #ifndef MIN | |
166 | #define MIN(a, b) ((a) < (b) ? (a) : (b)) | |
167 | #endif | |
168 | #ifndef MAX | |
169 | #define MAX(a, b) ((a) < (b) ? (b) : (a)) | |
170 | #endif | |
171 | #ifndef ABS | |
172 | #define ABS(a) ((a) < 0 ? -(a) : (a)) | |
173 | #endif | |
174 | #ifndef DIV_ROUND_UP | |
175 | #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) | |
176 | #endif | |
177 | #ifndef roundup | |
178 | #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) | |
179 | #endif | |
180 | #ifndef howmany | |
181 | #define howmany(x, y) (((x) + ((y) - 1)) / (y)) | |
182 | #endif | |
183 | ||
184 | /* | |
185 | * Compatibility macros/typedefs needed for Solaris -> Linux port | |
186 | */ | |
187 | #define P2ALIGN(x, align) ((x) & -(align)) | |
188 | #define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1) | |
189 | #define P2ROUNDUP(x, align) ((((x) - 1) | ((align) - 1)) + 1) | |
190 | #define P2PHASE(x, align) ((x) & ((align) - 1)) | |
191 | #define P2NPHASE(x, align) (-(x) & ((align) - 1)) | |
192 | #define ISP2(x) (((x) & ((x) - 1)) == 0) | |
193 | #define IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1))==0) | |
194 | #define P2BOUNDARY(off, len, align) \ | |
195 | (((off) ^ ((off) + (len) - 1)) > (align) - 1) | |
196 | ||
197 | /* | |
198 | * Typed version of the P2* macros. These macros should be used to ensure | |
199 | * that the result is correctly calculated based on the data type of (x), | |
200 | * which is passed in as the last argument, regardless of the data | |
201 | * type of the alignment. For example, if (x) is of type uint64_t, | |
202 | * and we want to round it up to a page boundary using "PAGESIZE" as | |
203 | * the alignment, we can do either | |
204 | * | |
205 | * P2ROUNDUP(x, (uint64_t)PAGESIZE) | |
206 | * or | |
207 | * P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t) | |
208 | */ | |
209 | #define P2ALIGN_TYPED(x, align, type) \ | |
210 | ((type)(x) & -(type)(align)) | |
211 | #define P2PHASE_TYPED(x, align, type) \ | |
212 | ((type)(x) & ((type)(align) - 1)) | |
213 | #define P2NPHASE_TYPED(x, align, type) \ | |
214 | (-(type)(x) & ((type)(align) - 1)) | |
215 | #define P2ROUNDUP_TYPED(x, align, type) \ | |
216 | ((((type)(x) - 1) | ((type)(align) - 1)) + 1) | |
217 | #define P2END_TYPED(x, align, type) \ | |
218 | (-(~(type)(x) & -(type)(align))) | |
219 | #define P2PHASEUP_TYPED(x, align, phase, type) \ | |
220 | ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align))) | |
221 | #define P2CROSS_TYPED(x, y, align, type) \ | |
222 | (((type)(x) ^ (type)(y)) > (type)(align) - 1) | |
223 | #define P2SAMEHIGHBIT_TYPED(x, y, type) \ | |
224 | (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y))) | |
225 | ||
226 | #if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof) | |
227 | ||
228 | /* avoid any possibility of clashing with <stddef.h> version */ | |
229 | ||
230 | #define offsetof(s, m) ((size_t)(&(((s *)0)->m))) | |
231 | #endif | |
232 | ||
233 | #endif /* _SPL_SYSMACROS_H */ |