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/rwlock.h>
34 #include <sys/taskq.h>
35 #include <sys/debug.h>
37 #include <sys/kstat.h>
38 #include <sys/utsname.h>
40 #include <linux/kmod.h>
41 #include "spl_config.h"
43 #ifdef DEBUG_SUBSYSTEM
44 #undef DEBUG_SUBSYSTEM
47 #define DEBUG_SUBSYSTEM S_GENERIC
49 char spl_version
[16] = "SPL v" SPL_META_VERSION
;
52 EXPORT_SYMBOL(spl_hostid
);
54 char hw_serial
[HW_HOSTID_LEN
] = "<none>";
55 EXPORT_SYMBOL(hw_serial
);
60 #ifndef HAVE_KALLSYMS_LOOKUP_NAME
61 kallsyms_lookup_name_t spl_kallsyms_lookup_name_fn
= SYMBOL_POISON
;
65 highbit(unsigned long i
)
72 #if BITS_PER_LONG == 64
73 if (i
& 0xffffffff00000000ul
) {
94 EXPORT_SYMBOL(highbit
);
97 * Implementation of 64 bit division for 32-bit machines.
99 #if BITS_PER_LONG == 32
100 uint64_t __udivdi3(uint64_t dividend
, uint64_t divisor
)
102 #if defined(HAVE_DIV64_64) /* 2.6.22 - 2.6.25 API */
103 return div64_64(dividend
, divisor
);
104 #elif defined(HAVE_DIV64_U64) /* 2.6.26 - 2.6.x API */
105 return div64_u64(dividend
, divisor
);
107 /* Implementation from 2.6.30 kernel */
110 high
= divisor
>> 32;
112 unsigned int shift
= fls(high
);
114 d
= divisor
>> shift
;
119 return do_div(dividend
, d
);
120 #endif /* HAVE_DIV64_64, HAVE_DIV64_U64 */
122 EXPORT_SYMBOL(__udivdi3
);
125 * Implementation of 64 bit modulo for 32-bit machines.
127 uint64_t __umoddi3(uint64_t dividend
, uint64_t divisor
)
129 return dividend
- divisor
* (dividend
/ divisor
);
131 EXPORT_SYMBOL(__umoddi3
);
132 #endif /* BITS_PER_LONG */
134 /* NOTE: The strtoxx behavior is solely based on my reading of the Solaris
135 * ddi_strtol(9F) man page. I have not verified the behavior of these
136 * functions against their Solaris counterparts. It is possible that I
137 * may have misinterpreted the man page or the man page is incorrect.
139 int ddi_strtoul(const char *, char **, int, unsigned long *);
140 int ddi_strtol(const char *, char **, int, long *);
141 int ddi_strtoull(const char *, char **, int, unsigned long long *);
142 int ddi_strtoll(const char *, char **, int, long long *);
144 #define define_ddi_strtoux(type, valtype) \
145 int ddi_strtou##type(const char *str, char **endptr, \
146 int base, valtype *result) \
148 valtype last_value, value = 0; \
149 char *ptr = (char *)str; \
150 int flag = 1, digit; \
152 if (strlen(ptr) == 0) \
155 /* Auto-detect base based on prefix */ \
157 if (str[0] == '0') { \
158 if (tolower(str[1])=='x' && isxdigit(str[2])) { \
159 base = 16; /* hex */ \
161 } else if (str[1] >= '0' && str[1] < 8) { \
162 base = 8; /* octal */ \
168 base = 10; /* decimal */ \
174 digit = *ptr - '0'; \
175 else if (isalpha(*ptr)) \
176 digit = tolower(*ptr) - 'a' + 10; \
183 last_value = value; \
184 value = value * base + digit; \
185 if (last_value > value) /* Overflow */ \
196 *endptr = (char *)(flag ? ptr : str); \
201 #define define_ddi_strtox(type, valtype) \
202 int ddi_strto##type(const char *str, char **endptr, \
203 int base, valtype *result) \
208 rc = ddi_strtou##type(str + 1, endptr, base, result); \
210 if (*endptr == str + 1) \
211 *endptr = (char *)str; \
213 *result = -*result; \
216 rc = ddi_strtou##type(str, endptr, base, result); \
222 define_ddi_strtoux(l
, unsigned long)
223 define_ddi_strtox(l
, long)
224 define_ddi_strtoux(ll
, unsigned long long)
225 define_ddi_strtox(ll
, long long)
227 EXPORT_SYMBOL(ddi_strtoul
);
228 EXPORT_SYMBOL(ddi_strtol
);
229 EXPORT_SYMBOL(ddi_strtoll
);
230 EXPORT_SYMBOL(ddi_strtoull
);
233 ddi_copyin(const void *from
, void *to
, size_t len
, int flags
)
235 /* Fake ioctl() issued by kernel, 'from' is a kernel address */
236 if (flags
& FKIOCTL
) {
237 memcpy(to
, from
, len
);
241 return copyin(from
, to
, len
);
243 EXPORT_SYMBOL(ddi_copyin
);
246 ddi_copyout(const void *from
, void *to
, size_t len
, int flags
)
248 /* Fake ioctl() issued by kernel, 'from' is a kernel address */
249 if (flags
& FKIOCTL
) {
250 memcpy(to
, from
, len
);
254 return copyout(from
, to
, len
);
256 EXPORT_SYMBOL(ddi_copyout
);
258 #ifndef HAVE_PUT_TASK_STRUCT
260 * This is only a stub function which should never be used. The SPL should
261 * never be putting away the last reference on a task structure so this will
262 * not be called. However, we still need to define it so the module does not
263 * have undefined symbol at load time. That all said if this impossible
264 * thing does somehow happen SBUG() immediately so we know about it.
267 __put_task_struct(struct task_struct
*t
)
271 EXPORT_SYMBOL(__put_task_struct
);
272 #endif /* HAVE_PUT_TASK_STRUCT */
274 struct new_utsname
*__utsname(void)
276 #ifdef HAVE_INIT_UTSNAME
277 return init_utsname();
279 return &system_utsname
;
282 EXPORT_SYMBOL(__utsname
);
287 char sh_path
[] = "/bin/sh";
288 char *argv
[] = { sh_path
,
290 "/usr/bin/hostid >/proc/sys/kernel/spl/hostid",
292 char *envp
[] = { "HOME=/",
294 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
298 /* Doing address resolution in the kernel is tricky and just
299 * not a good idea in general. So to set the proper 'hw_serial'
300 * use the usermodehelper support to ask '/bin/sh' to run
301 * '/usr/bin/hostid' and redirect the result to /proc/sys/spl/hostid
302 * for us to use. It's a horrific solution but it will do for now.
304 rc
= call_usermodehelper(sh_path
, argv
, envp
, 1);
306 printk("SPL: Failed user helper '%s %s %s', rc = %d\n",
307 argv
[0], argv
[1], argv
[2], rc
);
313 zone_get_hostid(void *zone
)
315 unsigned long hostid
;
317 /* Only the global zone is supported */
318 ASSERT(zone
== NULL
);
320 if (ddi_strtoul(hw_serial
, NULL
, HW_HOSTID_LEN
-1, &hostid
) != 0)
321 return HW_INVALID_HOSTID
;
323 return (uint32_t)hostid
;
325 EXPORT_SYMBOL(zone_get_hostid
);
327 #ifndef HAVE_KALLSYMS_LOOKUP_NAME
329 * Because kallsyms_lookup_name() is no longer exported in the
330 * mainline kernel we are forced to resort to somewhat drastic
331 * measures. This function replaces the functionality by performing
332 * an upcall to user space where /proc/kallsyms is consulted for
333 * the requested address.
335 #define GET_KALLSYMS_ADDR_CMD \
336 "awk '{ if ( $3 == \"kallsyms_lookup_name\") { print $1 } }' " \
337 "/proc/kallsyms >/proc/sys/kernel/spl/kallsyms_lookup_name"
340 set_kallsyms_lookup_name(void)
342 char sh_path
[] = "/bin/sh";
343 char *argv
[] = { sh_path
,
345 GET_KALLSYMS_ADDR_CMD
,
347 char *envp
[] = { "HOME=/",
349 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
353 rc
= call_usermodehelper(sh_path
, argv
, envp
, 1);
355 printk("SPL: Failed user helper '%s %s %s', rc = %d\n",
356 argv
[0], argv
[1], argv
[2], rc
);
363 __init
spl_init(void)
367 if ((rc
= debug_init()))
370 if ((rc
= spl_kmem_init()))
373 if ((rc
= spl_mutex_init()))
376 if ((rc
= spl_rw_init()))
379 if ((rc
= spl_taskq_init()))
382 if ((rc
= vn_init()))
385 if ((rc
= proc_init()))
388 if ((rc
= kstat_init()))
391 if ((rc
= set_hostid()))
392 GOTO(out8
, rc
= -EADDRNOTAVAIL
);
394 #ifndef HAVE_KALLSYMS_LOOKUP_NAME
395 if ((rc
= set_kallsyms_lookup_name()))
396 GOTO(out8
, rc
= -EADDRNOTAVAIL
);
397 #endif /* HAVE_KALLSYMS_LOOKUP_NAME */
399 if ((rc
= spl_kmem_init_kallsyms_lookup()))
402 printk("SPL: Loaded Solaris Porting Layer v%s\n", SPL_META_VERSION
);
421 printk("SPL: Failed to Load Solaris Porting Layer v%s, "
422 "rc = %d\n", SPL_META_VERSION
, rc
);
431 printk("SPL: Unloaded Solaris Porting Layer v%s\n", SPL_META_VERSION
);
442 /* Called when a dependent module is loaded */
447 * At module load time the pwd is set to '/' on a Solaris system.
448 * On a Linux system will be set to whatever directory the caller
449 * was in when executing insmod/modprobe.
453 EXPORT_SYMBOL(spl_setup
);
455 /* Called when a dependent module is unloaded */
460 EXPORT_SYMBOL(spl_cleanup
);
462 module_init(spl_init
);
463 module_exit(spl_fini
);
465 MODULE_AUTHOR("Lawrence Livermore National Labs");
466 MODULE_DESCRIPTION("Solaris Porting Layer");
467 MODULE_LICENSE("GPL");