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286 lines
6.5 KiB
C
286 lines
6.5 KiB
C
/*
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* This file is part of the SPL: Solaris Porting Layer.
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*
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* Copyright (c) 2008 Lawrence Livermore National Security, LLC.
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* Produced at Lawrence Livermore National Laboratory
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* Written by:
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* Brian Behlendorf <behlendorf1@llnl.gov>,
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* Herb Wartens <wartens2@llnl.gov>,
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* Jim Garlick <garlick@llnl.gov>
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* UCRL-CODE-235197
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <sys/sysmacros.h>
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#include <sys/vmsystm.h>
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#include <sys/vnode.h>
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#include <sys/kmem.h>
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#include <sys/mutex.h>
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#include <sys/taskq.h>
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#include <sys/debug.h>
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#include <sys/proc.h>
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#include <sys/kstat.h>
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#include <sys/utsname.h>
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#include <linux/kmod.h>
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#ifdef DEBUG_SUBSYSTEM
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#undef DEBUG_SUBSYSTEM
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#endif
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#define DEBUG_SUBSYSTEM S_GENERIC
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char spl_version[16] = "SPL v" VERSION;
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long spl_hostid = 0;
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EXPORT_SYMBOL(spl_hostid);
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char hw_serial[11] = "<none>";
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EXPORT_SYMBOL(hw_serial);
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int p0 = 0;
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EXPORT_SYMBOL(p0);
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vmem_t *zio_alloc_arena = NULL;
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EXPORT_SYMBOL(zio_alloc_arena);
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int
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highbit(unsigned long i)
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{
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register int h = 1;
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ENTRY;
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if (i == 0)
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RETURN(0);
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#if BITS_PER_LONG == 64
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if (i & 0xffffffff00000000ul) {
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h += 32; i >>= 32;
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}
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#endif
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if (i & 0xffff0000) {
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h += 16; i >>= 16;
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}
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if (i & 0xff00) {
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h += 8; i >>= 8;
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}
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if (i & 0xf0) {
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h += 4; i >>= 4;
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}
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if (i & 0xc) {
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h += 2; i >>= 2;
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}
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if (i & 0x2) {
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h += 1;
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}
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RETURN(h);
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}
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EXPORT_SYMBOL(highbit);
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/*
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* Implementation of 64 bit division for 32-bit machines.
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*/
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#if BITS_PER_LONG == 32
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uint64_t __udivdi3(uint64_t dividend, uint64_t divisor)
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{
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#ifdef HAVE_DIV64_64
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return div64_64(dividend, divisor);
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#else
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/* Taken from a 2.6.24 kernel. */
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uint32_t high, d;
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high = divisor >> 32;
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if (high) {
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unsigned int shift = fls(high);
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d = divisor >> shift;
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dividend >>= shift;
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} else
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d = divisor;
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do_div(dividend, d);
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return dividend;
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#endif
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}
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EXPORT_SYMBOL(__udivdi3);
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/*
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* Implementation of 64 bit modulo for 32-bit machines.
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*/
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uint64_t __umoddi3(uint64_t dividend, uint64_t divisor)
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{
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return dividend - divisor * (dividend / divisor);
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}
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EXPORT_SYMBOL(__umoddi3);
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#endif
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int ddi_strtoul(const char *, char **, int, unsigned long *);
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int ddi_strtol(const char *, char **, int, long *);
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int ddi_strtoull(const char *, char **, int, unsigned long long *);
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int ddi_strtoll(const char *, char **, int, long long *);
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#define define_ddi_strtoux(type, valtype) \
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int ddi_strtou##type(const char *str, char **endptr, \
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int base, valtype *result) \
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{ \
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valtype val; \
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size_t len; \
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\
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len = strlen(str); \
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if (len == 0) \
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return -EINVAL; \
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\
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val = simple_strtoul(str, endptr, (unsigned int)base); \
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if ((**endptr == '\0') || \
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((len == (size_t)(*endptr-str) + 1) && (**endptr == '\n'))) {\
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*result = val; \
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return 0; \
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} \
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\
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return -EINVAL; \
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} \
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#define define_ddi_strtox(type, valtype) \
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int ddi_strto##type(const char *str, char **endptr, \
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int base, valtype *result) \
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{ \
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int ret; \
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\
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if (*str == '-') { \
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ret = ddi_strtou##type(str+1, endptr, \
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(unsigned int)base, result); \
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if (!ret) \
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*result = -(*result); \
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} else { \
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ret = ddi_strtou##type(str, endptr, \
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(unsigned int)base, result); \
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} \
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\
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return ret; \
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} \
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define_ddi_strtoux(l, unsigned long)
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define_ddi_strtox(l, long)
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define_ddi_strtoux(ll, unsigned long long)
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define_ddi_strtox(ll, long long)
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EXPORT_SYMBOL(ddi_strtoul);
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EXPORT_SYMBOL(ddi_strtol);
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EXPORT_SYMBOL(ddi_strtoll);
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EXPORT_SYMBOL(ddi_strtoull);
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struct new_utsname *__utsname(void)
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{
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#ifdef HAVE_INIT_UTSNAME
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return init_utsname();
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#else
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return &system_utsname;
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#endif
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}
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EXPORT_SYMBOL(__utsname);
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static int
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set_hostid(void)
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{
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char sh_path[] = "/bin/sh";
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char *argv[] = { sh_path,
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"-c",
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"/usr/bin/hostid >/proc/sys/kernel/spl/hostid",
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NULL };
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char *envp[] = { "HOME=/",
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"TERM=linux",
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"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
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NULL };
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/* Doing address resolution in the kernel is tricky and just
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* not a good idea in general. So to set the proper 'hw_serial'
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* use the usermodehelper support to ask '/bin/sh' to run
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* '/usr/bin/hostid' and redirect the result to /proc/sys/spl/hostid
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* for us to use. It's a horific solution but it will do for now.
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*/
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return call_usermodehelper(sh_path, argv, envp, 1);
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}
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static int __init spl_init(void)
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{
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int rc = 0;
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if ((rc = debug_init()))
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return rc;
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if ((rc = spl_kmem_init()))
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GOTO(out , rc);
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if ((rc = spl_mutex_init()))
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GOTO(out2 , rc);
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if ((rc = spl_taskq_init()))
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GOTO(out3, rc);
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if ((rc = vn_init()))
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GOTO(out4, rc);
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if ((rc = proc_init()))
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GOTO(out5, rc);
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if ((rc = kstat_init()))
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GOTO(out6, rc);
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if ((rc = set_hostid()))
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GOTO(out7, rc = -EADDRNOTAVAIL);
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printk("SPL: Loaded Solaris Porting Layer v%s\n", VERSION);
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RETURN(rc);
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out7:
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kstat_fini();
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out6:
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proc_fini();
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out5:
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vn_fini();
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out4:
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spl_taskq_fini();
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out3:
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spl_mutex_fini();
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out2:
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spl_kmem_fini();
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out:
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debug_fini();
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printk("SPL: Failed to Load Solaris Porting Layer v%s, "
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"rc = %d\n", VERSION, rc);
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return rc;
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}
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static void spl_fini(void)
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{
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ENTRY;
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printk("SPL: Unloaded Solaris Porting Layer v%s\n", VERSION);
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kstat_fini();
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proc_fini();
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vn_fini();
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spl_taskq_fini();
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spl_mutex_fini();
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spl_kmem_fini();
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debug_fini();
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}
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module_init(spl_init);
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module_exit(spl_fini);
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MODULE_AUTHOR("Lawrence Livermore National Labs");
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MODULE_DESCRIPTION("Solaris Porting Layer");
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MODULE_LICENSE("GPL");
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