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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> |
e9cb2b4f | 32 | #include <sys/taskq.h> |
8d0f1ee9 | 33 | #include <sys/debug.h> |
57d1b188 | 34 | #include <sys/proc.h> |
04a479f7 | 35 | #include <sys/kstat.h> |
691d2bd7 | 36 | #include <sys/utsname.h> |
f23e92fa | 37 | #include <linux/kmod.h> |
f1b59d26 | 38 | |
57d1b188 | 39 | #ifdef DEBUG_SUBSYSTEM |
40 | #undef DEBUG_SUBSYSTEM | |
41 | #endif | |
8d0f1ee9 | 42 | |
57d1b188 | 43 | #define DEBUG_SUBSYSTEM S_GENERIC |
f23e92fa | 44 | |
3561541c | 45 | char spl_version[16] = "SPL v" VERSION; |
46 | ||
937879f1 | 47 | long spl_hostid = 0; |
f23e92fa | 48 | EXPORT_SYMBOL(spl_hostid); |
8d0f1ee9 | 49 | |
937879f1 | 50 | char hw_serial[11] = "<none>"; |
51 | EXPORT_SYMBOL(hw_serial); | |
f1b59d26 | 52 | |
53 | int p0 = 0; | |
54 | EXPORT_SYMBOL(p0); | |
70eadc19 | 55 | |
af828292 | 56 | vmem_t *zio_alloc_arena = NULL; |
57 | EXPORT_SYMBOL(zio_alloc_arena); | |
58 | ||
77b1fe8f | 59 | int |
60 | highbit(unsigned long i) | |
61 | { | |
62 | register int h = 1; | |
3d061e9d | 63 | ENTRY; |
77b1fe8f | 64 | |
65 | if (i == 0) | |
57d1b188 | 66 | RETURN(0); |
77b1fe8f | 67 | #if BITS_PER_LONG == 64 |
68 | if (i & 0xffffffff00000000ul) { | |
69 | h += 32; i >>= 32; | |
70 | } | |
71 | #endif | |
72 | if (i & 0xffff0000) { | |
73 | h += 16; i >>= 16; | |
74 | } | |
75 | if (i & 0xff00) { | |
76 | h += 8; i >>= 8; | |
77 | } | |
78 | if (i & 0xf0) { | |
79 | h += 4; i >>= 4; | |
80 | } | |
81 | if (i & 0xc) { | |
82 | h += 2; i >>= 2; | |
83 | } | |
84 | if (i & 0x2) { | |
85 | h += 1; | |
86 | } | |
57d1b188 | 87 | RETURN(h); |
77b1fe8f | 88 | } |
89 | EXPORT_SYMBOL(highbit); | |
90 | ||
b61a6e8b | 91 | /* |
550f1705 | 92 | * Implementation of 64 bit division for 32-bit machines. |
b61a6e8b | 93 | */ |
550f1705 | 94 | #if BITS_PER_LONG == 32 |
95 | uint64_t __udivdi3(uint64_t dividend, uint64_t divisor) | |
b61a6e8b | 96 | { |
550f1705 | 97 | #ifdef HAVE_DIV64_64 |
98 | return div64_64(dividend, divisor); | |
99 | #else | |
100 | /* Taken from a 2.6.24 kernel. */ | |
b61a6e8b | 101 | uint32_t high, d; |
102 | ||
103 | high = divisor >> 32; | |
104 | if (high) { | |
105 | unsigned int shift = fls(high); | |
106 | ||
107 | d = divisor >> shift; | |
108 | dividend >>= shift; | |
109 | } else | |
110 | d = divisor; | |
111 | ||
112 | do_div(dividend, d); | |
113 | ||
114 | return dividend; | |
550f1705 | 115 | #endif |
116 | } | |
117 | EXPORT_SYMBOL(__udivdi3); | |
118 | ||
119 | /* | |
120 | * Implementation of 64 bit modulo for 32-bit machines. | |
121 | */ | |
122 | uint64_t __umoddi3(uint64_t dividend, uint64_t divisor) | |
123 | { | |
124 | return dividend - divisor * (dividend / divisor); | |
b61a6e8b | 125 | } |
550f1705 | 126 | EXPORT_SYMBOL(__umoddi3); |
127 | #endif | |
b61a6e8b | 128 | |
2ee63a54 BB |
129 | int ddi_strtoul(const char *, char **, int, unsigned long *); |
130 | int ddi_strtol(const char *, char **, int, long *); | |
131 | int ddi_strtoull(const char *, char **, int, unsigned long long *); | |
132 | int ddi_strtoll(const char *, char **, int, long long *); | |
133 | ||
134 | #define define_ddi_strtoux(type, valtype) \ | |
135 | int ddi_strtou##type(const char *str, char **endptr, \ | |
136 | int base, valtype *result) \ | |
137 | { \ | |
138 | valtype val; \ | |
139 | size_t len; \ | |
140 | \ | |
141 | len = strlen(str); \ | |
142 | if (len == 0) \ | |
143 | return -EINVAL; \ | |
144 | \ | |
145 | val = simple_strtoul(str, endptr, (unsigned int)base); \ | |
146 | if ((**endptr == '\0') || \ | |
147 | ((len == (size_t)(*endptr-str) + 1) && (**endptr == '\n'))) {\ | |
148 | *result = val; \ | |
149 | return 0; \ | |
150 | } \ | |
151 | \ | |
152 | return -EINVAL; \ | |
153 | } \ | |
154 | ||
155 | #define define_ddi_strtox(type, valtype) \ | |
156 | int ddi_strto##type(const char *str, char **endptr, \ | |
157 | int base, valtype *result) \ | |
158 | { \ | |
159 | int ret; \ | |
160 | \ | |
161 | if (*str == '-') { \ | |
162 | ret = ddi_strtou##type(str+1, endptr, \ | |
163 | (unsigned int)base, result); \ | |
164 | if (!ret) \ | |
165 | *result = -(*result); \ | |
166 | } else { \ | |
167 | ret = ddi_strtou##type(str, endptr, \ | |
168 | (unsigned int)base, result); \ | |
169 | } \ | |
170 | \ | |
171 | return ret; \ | |
172 | } \ | |
173 | ||
174 | define_ddi_strtoux(l, unsigned long) | |
175 | define_ddi_strtox(l, long) | |
176 | define_ddi_strtoux(ll, unsigned long long) | |
177 | define_ddi_strtox(ll, long long) | |
178 | ||
2f5d55aa | 179 | EXPORT_SYMBOL(ddi_strtoul); |
2ee63a54 BB |
180 | EXPORT_SYMBOL(ddi_strtol); |
181 | EXPORT_SYMBOL(ddi_strtoll); | |
182 | EXPORT_SYMBOL(ddi_strtoull); | |
2f5d55aa | 183 | |
691d2bd7 | 184 | struct new_utsname *__utsname(void) |
185 | { | |
3d061e9d | 186 | #ifdef HAVE_INIT_UTSNAME |
691d2bd7 | 187 | return init_utsname(); |
3d061e9d | 188 | #else |
189 | return &system_utsname; | |
190 | #endif | |
691d2bd7 | 191 | } |
192 | EXPORT_SYMBOL(__utsname); | |
193 | ||
8d0f1ee9 | 194 | static int |
57d1b188 | 195 | set_hostid(void) |
8d0f1ee9 | 196 | { |
f23e92fa | 197 | char sh_path[] = "/bin/sh"; |
198 | char *argv[] = { sh_path, | |
199 | "-c", | |
57d86234 | 200 | "/usr/bin/hostid >/proc/sys/kernel/spl/hostid", |
f23e92fa | 201 | NULL }; |
202 | char *envp[] = { "HOME=/", | |
203 | "TERM=linux", | |
204 | "PATH=/sbin:/usr/sbin:/bin:/usr/bin", | |
205 | NULL }; | |
8d0f1ee9 | 206 | |
57d1b188 | 207 | /* Doing address resolution in the kernel is tricky and just |
937879f1 | 208 | * not a good idea in general. So to set the proper 'hw_serial' |
57d1b188 | 209 | * use the usermodehelper support to ask '/bin/sh' to run |
210 | * '/usr/bin/hostid' and redirect the result to /proc/sys/spl/hostid | |
211 | * for us to use. It's a horific solution but it will do for now. | |
212 | */ | |
213 | return call_usermodehelper(sh_path, argv, envp, 1); | |
214 | } | |
8d0f1ee9 | 215 | |
57d1b188 | 216 | static int __init spl_init(void) |
217 | { | |
218 | int rc = 0; | |
f23e92fa | 219 | |
57d1b188 | 220 | if ((rc = debug_init())) |
18c9eadf | 221 | return rc; |
f23e92fa | 222 | |
2fb9b26a | 223 | if ((rc = spl_kmem_init())) |
57d1b188 | 224 | GOTO(out , rc); |
8d0f1ee9 | 225 | |
9ab1ac14 | 226 | if ((rc = spl_mutex_init())) |
227 | GOTO(out2 , rc); | |
228 | ||
e9cb2b4f | 229 | if ((rc = spl_taskq_init())) |
9ab1ac14 | 230 | GOTO(out3, rc); |
8d0f1ee9 | 231 | |
e9cb2b4f | 232 | if ((rc = vn_init())) |
9ab1ac14 | 233 | GOTO(out4, rc); |
af828292 | 234 | |
e9cb2b4f | 235 | if ((rc = proc_init())) |
04a479f7 | 236 | GOTO(out5, rc); |
237 | ||
e9cb2b4f BB |
238 | if ((rc = kstat_init())) |
239 | GOTO(out6, rc); | |
240 | ||
57d1b188 | 241 | if ((rc = set_hostid())) |
e9cb2b4f | 242 | GOTO(out7, rc = -EADDRNOTAVAIL); |
f23e92fa | 243 | |
937879f1 | 244 | printk("SPL: Loaded Solaris Porting Layer v%s\n", VERSION); |
57d1b188 | 245 | RETURN(rc); |
e9cb2b4f | 246 | out7: |
04a479f7 | 247 | kstat_fini(); |
e9cb2b4f | 248 | out6: |
57d1b188 | 249 | proc_fini(); |
e9cb2b4f | 250 | out5: |
57d1b188 | 251 | vn_fini(); |
e9cb2b4f BB |
252 | out4: |
253 | spl_taskq_fini(); | |
9ab1ac14 | 254 | out3: |
255 | spl_mutex_fini(); | |
8d0f1ee9 | 256 | out2: |
2fb9b26a | 257 | spl_kmem_fini(); |
8d0f1ee9 | 258 | out: |
57d1b188 | 259 | debug_fini(); |
8d0f1ee9 | 260 | |
57d1b188 | 261 | printk("SPL: Failed to Load Solaris Porting Layer v%s, " |
262 | "rc = %d\n", VERSION, rc); | |
18c9eadf | 263 | return rc; |
70eadc19 | 264 | } |
265 | ||
266 | static void spl_fini(void) | |
267 | { | |
57d1b188 | 268 | ENTRY; |
269 | ||
937879f1 | 270 | printk("SPL: Unloaded Solaris Porting Layer v%s\n", VERSION); |
04a479f7 | 271 | kstat_fini(); |
57d1b188 | 272 | proc_fini(); |
af828292 | 273 | vn_fini(); |
e9cb2b4f | 274 | spl_taskq_fini(); |
2fb9b26a | 275 | spl_mutex_fini(); |
276 | spl_kmem_fini(); | |
57d1b188 | 277 | debug_fini(); |
70eadc19 | 278 | } |
279 | ||
280 | module_init(spl_init); | |
281 | module_exit(spl_fini); | |
282 | ||
283 | MODULE_AUTHOR("Lawrence Livermore National Labs"); | |
284 | MODULE_DESCRIPTION("Solaris Porting Layer"); | |
285 | MODULE_LICENSE("GPL"); |