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715f6251 | 1 | /* |
2 | * This file is part of the SPL: Solaris Porting Layer. | |
3 | * | |
4 | * Copyright (c) 2008 Lawrence Livermore National Security, LLC. | |
5 | * Produced at Lawrence Livermore National Laboratory | |
6 | * Written by: | |
7 | * Brian Behlendorf <behlendorf1@llnl.gov>, | |
8 | * Herb Wartens <wartens2@llnl.gov>, | |
9 | * Jim Garlick <garlick@llnl.gov> | |
10 | * UCRL-CODE-235197 | |
11 | * | |
12 | * This is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This is distributed in the hope that it will be useful, but WITHOUT | |
18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
20 | * for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License along | |
23 | * with this program; if not, write to the Free Software Foundation, Inc., | |
24 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
25 | */ | |
26 | ||
14c5326c | 27 | #include <sys/sysmacros.h> |
af828292 | 28 | #include <sys/vmsystm.h> |
29 | #include <sys/vnode.h> | |
c19c06f3 | 30 | #include <sys/kmem.h> |
9ab1ac14 | 31 | #include <sys/mutex.h> |
8d0f1ee9 | 32 | #include <sys/debug.h> |
57d1b188 | 33 | #include <sys/proc.h> |
04a479f7 | 34 | #include <sys/kstat.h> |
691d2bd7 | 35 | #include <sys/utsname.h> |
f23e92fa | 36 | #include <linux/kmod.h> |
f1b59d26 | 37 | |
57d1b188 | 38 | #ifdef DEBUG_SUBSYSTEM |
39 | #undef DEBUG_SUBSYSTEM | |
40 | #endif | |
8d0f1ee9 | 41 | |
57d1b188 | 42 | #define DEBUG_SUBSYSTEM S_GENERIC |
f23e92fa | 43 | |
3561541c | 44 | char spl_version[16] = "SPL v" VERSION; |
45 | ||
937879f1 | 46 | long spl_hostid = 0; |
f23e92fa | 47 | EXPORT_SYMBOL(spl_hostid); |
8d0f1ee9 | 48 | |
937879f1 | 49 | char hw_serial[11] = "<none>"; |
50 | EXPORT_SYMBOL(hw_serial); | |
f1b59d26 | 51 | |
52 | int p0 = 0; | |
53 | EXPORT_SYMBOL(p0); | |
70eadc19 | 54 | |
af828292 | 55 | vmem_t *zio_alloc_arena = NULL; |
56 | EXPORT_SYMBOL(zio_alloc_arena); | |
57 | ||
77b1fe8f | 58 | int |
59 | highbit(unsigned long i) | |
60 | { | |
61 | register int h = 1; | |
3d061e9d | 62 | ENTRY; |
77b1fe8f | 63 | |
64 | if (i == 0) | |
57d1b188 | 65 | RETURN(0); |
77b1fe8f | 66 | #if BITS_PER_LONG == 64 |
67 | if (i & 0xffffffff00000000ul) { | |
68 | h += 32; i >>= 32; | |
69 | } | |
70 | #endif | |
71 | if (i & 0xffff0000) { | |
72 | h += 16; i >>= 16; | |
73 | } | |
74 | if (i & 0xff00) { | |
75 | h += 8; i >>= 8; | |
76 | } | |
77 | if (i & 0xf0) { | |
78 | h += 4; i >>= 4; | |
79 | } | |
80 | if (i & 0xc) { | |
81 | h += 2; i >>= 2; | |
82 | } | |
83 | if (i & 0x2) { | |
84 | h += 1; | |
85 | } | |
57d1b188 | 86 | RETURN(h); |
77b1fe8f | 87 | } |
88 | EXPORT_SYMBOL(highbit); | |
89 | ||
b61a6e8b | 90 | /* |
550f1705 | 91 | * Implementation of 64 bit division for 32-bit machines. |
b61a6e8b | 92 | */ |
550f1705 | 93 | #if BITS_PER_LONG == 32 |
94 | uint64_t __udivdi3(uint64_t dividend, uint64_t divisor) | |
b61a6e8b | 95 | { |
550f1705 | 96 | #ifdef HAVE_DIV64_64 |
97 | return div64_64(dividend, divisor); | |
98 | #else | |
99 | /* Taken from a 2.6.24 kernel. */ | |
b61a6e8b | 100 | uint32_t high, d; |
101 | ||
102 | high = divisor >> 32; | |
103 | if (high) { | |
104 | unsigned int shift = fls(high); | |
105 | ||
106 | d = divisor >> shift; | |
107 | dividend >>= shift; | |
108 | } else | |
109 | d = divisor; | |
110 | ||
111 | do_div(dividend, d); | |
112 | ||
113 | return dividend; | |
550f1705 | 114 | #endif |
115 | } | |
116 | EXPORT_SYMBOL(__udivdi3); | |
117 | ||
118 | /* | |
119 | * Implementation of 64 bit modulo for 32-bit machines. | |
120 | */ | |
121 | uint64_t __umoddi3(uint64_t dividend, uint64_t divisor) | |
122 | { | |
123 | return dividend - divisor * (dividend / divisor); | |
b61a6e8b | 124 | } |
550f1705 | 125 | EXPORT_SYMBOL(__umoddi3); |
126 | #endif | |
b61a6e8b | 127 | |
2f5d55aa | 128 | int |
129 | ddi_strtoul(const char *str, char **nptr, int base, unsigned long *result) | |
130 | { | |
131 | char *end; | |
132 | return (*result = simple_strtoul(str, &end, base)); | |
133 | } | |
134 | EXPORT_SYMBOL(ddi_strtoul); | |
135 | ||
691d2bd7 | 136 | struct new_utsname *__utsname(void) |
137 | { | |
3d061e9d | 138 | #ifdef HAVE_INIT_UTSNAME |
691d2bd7 | 139 | return init_utsname(); |
3d061e9d | 140 | #else |
141 | return &system_utsname; | |
142 | #endif | |
691d2bd7 | 143 | } |
144 | EXPORT_SYMBOL(__utsname); | |
145 | ||
8d0f1ee9 | 146 | static int |
57d1b188 | 147 | set_hostid(void) |
8d0f1ee9 | 148 | { |
f23e92fa | 149 | char sh_path[] = "/bin/sh"; |
150 | char *argv[] = { sh_path, | |
151 | "-c", | |
57d86234 | 152 | "/usr/bin/hostid >/proc/sys/kernel/spl/hostid", |
f23e92fa | 153 | NULL }; |
154 | char *envp[] = { "HOME=/", | |
155 | "TERM=linux", | |
156 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
157 | NULL }; | |
8d0f1ee9 | 158 | |
57d1b188 | 159 | /* Doing address resolution in the kernel is tricky and just |
937879f1 | 160 | * not a good idea in general. So to set the proper 'hw_serial' |
57d1b188 | 161 | * use the usermodehelper support to ask '/bin/sh' to run |
162 | * '/usr/bin/hostid' and redirect the result to /proc/sys/spl/hostid | |
163 | * for us to use. It's a horific solution but it will do for now. | |
164 | */ | |
165 | return call_usermodehelper(sh_path, argv, envp, 1); | |
166 | } | |
8d0f1ee9 | 167 | |
57d1b188 | 168 | static int __init spl_init(void) |
169 | { | |
170 | int rc = 0; | |
f23e92fa | 171 | |
57d1b188 | 172 | if ((rc = debug_init())) |
18c9eadf | 173 | return rc; |
f23e92fa | 174 | |
2fb9b26a | 175 | if ((rc = spl_kmem_init())) |
57d1b188 | 176 | GOTO(out , rc); |
8d0f1ee9 | 177 | |
9ab1ac14 | 178 | if ((rc = spl_mutex_init())) |
179 | GOTO(out2 , rc); | |
180 | ||
8d0f1ee9 | 181 | if ((rc = vn_init())) |
9ab1ac14 | 182 | GOTO(out3, rc); |
8d0f1ee9 | 183 | |
57d1b188 | 184 | if ((rc = proc_init())) |
9ab1ac14 | 185 | GOTO(out4, rc); |
af828292 | 186 | |
04a479f7 | 187 | if ((rc = kstat_init())) |
188 | GOTO(out5, rc); | |
189 | ||
57d1b188 | 190 | if ((rc = set_hostid())) |
04a479f7 | 191 | GOTO(out6, rc = -EADDRNOTAVAIL); |
f23e92fa | 192 | |
937879f1 | 193 | printk("SPL: Loaded Solaris Porting Layer v%s\n", VERSION); |
57d1b188 | 194 | RETURN(rc); |
04a479f7 | 195 | out6: |
196 | kstat_fini(); | |
9ab1ac14 | 197 | out5: |
57d1b188 | 198 | proc_fini(); |
9ab1ac14 | 199 | out4: |
57d1b188 | 200 | vn_fini(); |
9ab1ac14 | 201 | out3: |
202 | spl_mutex_fini(); | |
8d0f1ee9 | 203 | out2: |
2fb9b26a | 204 | spl_kmem_fini(); |
8d0f1ee9 | 205 | out: |
57d1b188 | 206 | debug_fini(); |
8d0f1ee9 | 207 | |
57d1b188 | 208 | printk("SPL: Failed to Load Solaris Porting Layer v%s, " |
209 | "rc = %d\n", VERSION, rc); | |
18c9eadf | 210 | return rc; |
70eadc19 | 211 | } |
212 | ||
213 | static void spl_fini(void) | |
214 | { | |
57d1b188 | 215 | ENTRY; |
216 | ||
937879f1 | 217 | printk("SPL: Unloaded Solaris Porting Layer v%s\n", VERSION); |
04a479f7 | 218 | kstat_fini(); |
57d1b188 | 219 | proc_fini(); |
af828292 | 220 | vn_fini(); |
2fb9b26a | 221 | spl_mutex_fini(); |
222 | spl_kmem_fini(); | |
57d1b188 | 223 | debug_fini(); |
70eadc19 | 224 | } |
225 | ||
226 | module_init(spl_init); | |
227 | module_exit(spl_fini); | |
228 | ||
229 | MODULE_AUTHOR("Lawrence Livermore National Labs"); | |
230 | MODULE_DESCRIPTION("Solaris Porting Layer"); | |
231 | MODULE_LICENSE("GPL"); |