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mirror_zfs/modules/spl/spl-generic.c
Brian Behlendorf 2ee63a549a Add struct ddi_strtox functions
2008-12-05 16:23:57 -08:00

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/*
* This file is part of the SPL: Solaris Porting Layer.
*
* Copyright (c) 2008 Lawrence Livermore National Security, LLC.
* Produced at Lawrence Livermore National Laboratory
* Written by:
* Brian Behlendorf <behlendorf1@llnl.gov>,
* Herb Wartens <wartens2@llnl.gov>,
* Jim Garlick <garlick@llnl.gov>
* UCRL-CODE-235197
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <sys/sysmacros.h>
#include <sys/vmsystm.h>
#include <sys/vnode.h>
#include <sys/kmem.h>
#include <sys/mutex.h>
#include <sys/debug.h>
#include <sys/proc.h>
#include <sys/kstat.h>
#include <sys/utsname.h>
#include <linux/kmod.h>
#ifdef DEBUG_SUBSYSTEM
#undef DEBUG_SUBSYSTEM
#endif
#define DEBUG_SUBSYSTEM S_GENERIC
char spl_version[16] = "SPL v" VERSION;
long spl_hostid = 0;
EXPORT_SYMBOL(spl_hostid);
char hw_serial[11] = "<none>";
EXPORT_SYMBOL(hw_serial);
int p0 = 0;
EXPORT_SYMBOL(p0);
vmem_t *zio_alloc_arena = NULL;
EXPORT_SYMBOL(zio_alloc_arena);
int
highbit(unsigned long i)
{
register int h = 1;
ENTRY;
if (i == 0)
RETURN(0);
#if BITS_PER_LONG == 64
if (i & 0xffffffff00000000ul) {
h += 32; i >>= 32;
}
#endif
if (i & 0xffff0000) {
h += 16; i >>= 16;
}
if (i & 0xff00) {
h += 8; i >>= 8;
}
if (i & 0xf0) {
h += 4; i >>= 4;
}
if (i & 0xc) {
h += 2; i >>= 2;
}
if (i & 0x2) {
h += 1;
}
RETURN(h);
}
EXPORT_SYMBOL(highbit);
/*
* Implementation of 64 bit division for 32-bit machines.
*/
#if BITS_PER_LONG == 32
uint64_t __udivdi3(uint64_t dividend, uint64_t divisor)
{
#ifdef HAVE_DIV64_64
return div64_64(dividend, divisor);
#else
/* Taken from a 2.6.24 kernel. */
uint32_t high, d;
high = divisor >> 32;
if (high) {
unsigned int shift = fls(high);
d = divisor >> shift;
dividend >>= shift;
} else
d = divisor;
do_div(dividend, d);
return dividend;
#endif
}
EXPORT_SYMBOL(__udivdi3);
/*
* Implementation of 64 bit modulo for 32-bit machines.
*/
uint64_t __umoddi3(uint64_t dividend, uint64_t divisor)
{
return dividend - divisor * (dividend / divisor);
}
EXPORT_SYMBOL(__umoddi3);
#endif
int ddi_strtoul(const char *, char **, int, unsigned long *);
int ddi_strtol(const char *, char **, int, long *);
int ddi_strtoull(const char *, char **, int, unsigned long long *);
int ddi_strtoll(const char *, char **, int, long long *);
#define define_ddi_strtoux(type, valtype) \
int ddi_strtou##type(const char *str, char **endptr, \
int base, valtype *result) \
{ \
valtype val; \
size_t len; \
\
len = strlen(str); \
if (len == 0) \
return -EINVAL; \
\
val = simple_strtoul(str, endptr, (unsigned int)base); \
if ((**endptr == '\0') || \
((len == (size_t)(*endptr-str) + 1) && (**endptr == '\n'))) {\
*result = val; \
return 0; \
} \
\
return -EINVAL; \
} \
#define define_ddi_strtox(type, valtype) \
int ddi_strto##type(const char *str, char **endptr, \
int base, valtype *result) \
{ \
int ret; \
\
if (*str == '-') { \
ret = ddi_strtou##type(str+1, endptr, \
(unsigned int)base, result); \
if (!ret) \
*result = -(*result); \
} else { \
ret = ddi_strtou##type(str, endptr, \
(unsigned int)base, result); \
} \
\
return ret; \
} \
define_ddi_strtoux(l, unsigned long)
define_ddi_strtox(l, long)
define_ddi_strtoux(ll, unsigned long long)
define_ddi_strtox(ll, long long)
EXPORT_SYMBOL(ddi_strtoul);
EXPORT_SYMBOL(ddi_strtol);
EXPORT_SYMBOL(ddi_strtoll);
EXPORT_SYMBOL(ddi_strtoull);
struct new_utsname *__utsname(void)
{
#ifdef HAVE_INIT_UTSNAME
return init_utsname();
#else
return &system_utsname;
#endif
}
EXPORT_SYMBOL(__utsname);
static int
set_hostid(void)
{
char sh_path[] = "/bin/sh";
char *argv[] = { sh_path,
"-c",
"/usr/bin/hostid >/proc/sys/kernel/spl/hostid",
NULL };
char *envp[] = { "HOME=/",
"TERM=linux",
"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
NULL };
/* Doing address resolution in the kernel is tricky and just
* not a good idea in general. So to set the proper 'hw_serial'
* use the usermodehelper support to ask '/bin/sh' to run
* '/usr/bin/hostid' and redirect the result to /proc/sys/spl/hostid
* for us to use. It's a horific solution but it will do for now.
*/
return call_usermodehelper(sh_path, argv, envp, 1);
}
static int __init spl_init(void)
{
int rc = 0;
if ((rc = debug_init()))
return rc;
if ((rc = spl_kmem_init()))
GOTO(out , rc);
if ((rc = spl_mutex_init()))
GOTO(out2 , rc);
if ((rc = vn_init()))
GOTO(out3, rc);
if ((rc = proc_init()))
GOTO(out4, rc);
if ((rc = kstat_init()))
GOTO(out5, rc);
if ((rc = set_hostid()))
GOTO(out6, rc = -EADDRNOTAVAIL);
printk("SPL: Loaded Solaris Porting Layer v%s\n", VERSION);
RETURN(rc);
out6:
kstat_fini();
out5:
proc_fini();
out4:
vn_fini();
out3:
spl_mutex_fini();
out2:
spl_kmem_fini();
out:
debug_fini();
printk("SPL: Failed to Load Solaris Porting Layer v%s, "
"rc = %d\n", VERSION, rc);
return rc;
}
static void spl_fini(void)
{
ENTRY;
printk("SPL: Unloaded Solaris Porting Layer v%s\n", VERSION);
kstat_fini();
proc_fini();
vn_fini();
spl_mutex_fini();
spl_kmem_fini();
debug_fini();
}
module_init(spl_init);
module_exit(spl_fini);
MODULE_AUTHOR("Lawrence Livermore National Labs");
MODULE_DESCRIPTION("Solaris Porting Layer");
MODULE_LICENSE("GPL");
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