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2 * This file is part of the SPL: Solaris Porting Layer.
4 * Copyright (c) 2008 Lawrence Livermore National Security, LLC.
5 * Produced at Lawrence Livermore National Laboratory
7 * Brian Behlendorf <behlendorf1@llnl.gov>,
8 * Herb Wartens <wartens2@llnl.gov>,
9 * Jim Garlick <garlick@llnl.gov>
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.
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
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.
27 #include <sys/sysmacros.h>
28 #include <sys/systeminfo.h>
29 #include <sys/vmsystm.h>
30 #include <sys/vnode.h>
32 #include <sys/mutex.h>
33 #include <sys/taskq.h>
34 #include <sys/debug.h>
36 #include <sys/kstat.h>
37 #include <sys/utsname.h>
38 #include <linux/kmod.h>
40 #ifdef DEBUG_SUBSYSTEM
41 #undef DEBUG_SUBSYSTEM
44 #define DEBUG_SUBSYSTEM S_GENERIC
46 char spl_version
[16] = "SPL v" VERSION
;
49 EXPORT_SYMBOL(spl_hostid
);
51 char hw_serial
[HW_HOSTID_LEN
] = "<none>";
52 EXPORT_SYMBOL(hw_serial
);
58 highbit(unsigned long i
)
65 #if BITS_PER_LONG == 64
66 if (i
& 0xffffffff00000000ul
) {
87 EXPORT_SYMBOL(highbit
);
90 * Implementation of 64 bit division for 32-bit machines.
92 #if BITS_PER_LONG == 32
93 uint64_t __udivdi3(uint64_t dividend
, uint64_t divisor
)
96 return div64_64(dividend
, divisor
);
98 /* Taken from a 2.6.24 kernel. */
101 high
= divisor
>> 32;
103 unsigned int shift
= fls(high
);
105 d
= divisor
>> shift
;
115 EXPORT_SYMBOL(__udivdi3
);
118 * Implementation of 64 bit modulo for 32-bit machines.
120 uint64_t __umoddi3(uint64_t dividend
, uint64_t divisor
)
122 return dividend
- divisor
* (dividend
/ divisor
);
124 EXPORT_SYMBOL(__umoddi3
);
127 /* NOTE: The strtoxx behavior is solely based on my reading of the Solaris
128 * ddi_strtol(9F) man page. I have not verified the behavior of these
129 * functions against their Solaris counterparts. It is possible that I
130 * may have misinterpretted the man page or the man page is incorrect.
132 int ddi_strtoul(const char *, char **, int, unsigned long *);
133 int ddi_strtol(const char *, char **, int, long *);
134 int ddi_strtoull(const char *, char **, int, unsigned long long *);
135 int ddi_strtoll(const char *, char **, int, long long *);
137 #define define_ddi_strtoux(type, valtype) \
138 int ddi_strtou##type(const char *str, char **endptr, \
139 int base, valtype *result) \
141 valtype last_value, value = 0; \
142 char *ptr = (char *)str; \
143 int flag = 1, digit; \
145 if (strlen(ptr) == 0) \
148 /* Auto-detect base based on prefix */ \
150 if (str[0] == '0') { \
151 if (tolower(str[1])=='x' && isxdigit(str[2])) { \
152 base = 16; /* hex */ \
154 } else if (str[1] >= '0' && str[1] < 8) { \
155 base = 8; /* octal */ \
161 base = 10; /* decimal */ \
167 digit = *ptr - '0'; \
168 else if (isalpha(*ptr)) \
169 digit = tolower(*ptr) - 'a' + 10; \
176 last_value = value; \
177 value = value * base + digit; \
178 if (last_value > value) /* Overflow */ \
189 *endptr = (char *)(flag ? ptr : str); \
194 #define define_ddi_strtox(type, valtype) \
195 int ddi_strto##type(const char *str, char **endptr, \
196 int base, valtype *result) \
201 rc = ddi_strtou##type(str + 1, endptr, base, result); \
203 if (*endptr == str + 1) \
204 *endptr = (char *)str; \
206 *result = -*result; \
209 rc = ddi_strtou##type(str, endptr, base, result); \
215 define_ddi_strtoux(l
, unsigned long)
216 define_ddi_strtox(l
, long)
217 define_ddi_strtoux(ll
, unsigned long long)
218 define_ddi_strtox(ll
, long long)
220 EXPORT_SYMBOL(ddi_strtoul
);
221 EXPORT_SYMBOL(ddi_strtol
);
222 EXPORT_SYMBOL(ddi_strtoll
);
223 EXPORT_SYMBOL(ddi_strtoull
);
225 struct new_utsname
*__utsname(void)
227 #ifdef HAVE_INIT_UTSNAME
228 return init_utsname();
230 return &system_utsname
;
233 EXPORT_SYMBOL(__utsname
);
238 char sh_path
[] = "/bin/sh";
239 char *argv
[] = { sh_path
,
241 "/usr/bin/hostid >/proc/sys/kernel/spl/hostid",
243 char *envp
[] = { "HOME=/",
245 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
248 /* Doing address resolution in the kernel is tricky and just
249 * not a good idea in general. So to set the proper 'hw_serial'
250 * use the usermodehelper support to ask '/bin/sh' to run
251 * '/usr/bin/hostid' and redirect the result to /proc/sys/spl/hostid
252 * for us to use. It's a horific solution but it will do for now.
254 return call_usermodehelper(sh_path
, argv
, envp
, 1);
258 zone_get_hostid(void *zone
)
260 unsigned long hostid
;
262 /* Only the global zone is supported */
263 ASSERT(zone
== NULL
);
265 if (ddi_strtoul(hw_serial
, NULL
, HW_HOSTID_LEN
-1, &hostid
) != 0)
266 return HW_INVALID_HOSTID
;
268 return (uint32_t)hostid
;
270 EXPORT_SYMBOL(zone_get_hostid
);
272 static int __init
spl_init(void)
276 if ((rc
= debug_init()))
279 if ((rc
= spl_kmem_init()))
282 if ((rc
= spl_mutex_init()))
285 if ((rc
= spl_taskq_init()))
288 if ((rc
= vn_init()))
291 if ((rc
= proc_init()))
294 if ((rc
= kstat_init()))
297 if ((rc
= set_hostid()))
298 GOTO(out7
, rc
= -EADDRNOTAVAIL
);
300 printk("SPL: Loaded Solaris Porting Layer v%s\n", VERSION
);
317 printk("SPL: Failed to Load Solaris Porting Layer v%s, "
318 "rc = %d\n", VERSION
, rc
);
322 static void spl_fini(void)
326 printk("SPL: Unloaded Solaris Porting Layer v%s\n", VERSION
);
336 module_init(spl_init
);
337 module_exit(spl_fini
);
339 MODULE_AUTHOR("Lawrence Livermore National Labs");
340 MODULE_DESCRIPTION("Solaris Porting Layer");
341 MODULE_LICENSE("GPL");