0cbaeb117a
We need dependent packages to be able to include spl_config.h so they can leverage the configure checks the SPL has done. This is important because several of the spl headers need the results of these checks to work properly. Unfortunately, the autoheader build product is always private to a particular build and defined certain common things. (PACKAGE, VERSION, etc). This prevents other packages which also use autoheader from being include because the definitions conflict. To avoid this problem the SPL build system leverage AH_BOTTOM to include a spl_unconfig.h at the botton of the autoheader build product. This custom include undefs all known shared symbols to prevent the confict. This does however mean that those definition are also not availble to the SPL package either. The SPL package therefore uses the equivilant SPL_META_* definitions.
385 lines
9.0 KiB
C
385 lines
9.0 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/systeminfo.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" SPL_META_VERSION;
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long spl_hostid = 0;
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EXPORT_SYMBOL(spl_hostid);
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char hw_serial[HW_HOSTID_LEN] = "<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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#ifndef HAVE_KALLSYMS_LOOKUP_NAME
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kallsyms_lookup_name_t spl_kallsyms_lookup_name_fn = NULL;
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#endif
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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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/* NOTE: The strtoxx behavior is solely based on my reading of the Solaris
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* ddi_strtol(9F) man page. I have not verified the behavior of these
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* functions against their Solaris counterparts. It is possible that I
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* may have misinterpretted the man page or the man page is incorrect.
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*/
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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 last_value, value = 0; \
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char *ptr = (char *)str; \
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int flag = 1, digit; \
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\
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if (strlen(ptr) == 0) \
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return EINVAL; \
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\
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/* Auto-detect base based on prefix */ \
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if (!base) { \
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if (str[0] == '0') { \
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if (tolower(str[1])=='x' && isxdigit(str[2])) { \
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base = 16; /* hex */ \
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ptr += 2; \
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} else if (str[1] >= '0' && str[1] < 8) { \
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base = 8; /* octal */ \
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ptr += 1; \
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} else { \
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return EINVAL; \
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} \
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} else { \
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base = 10; /* decimal */ \
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} \
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} \
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\
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while (1) { \
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if (isdigit(*ptr)) \
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digit = *ptr - '0'; \
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else if (isalpha(*ptr)) \
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digit = tolower(*ptr) - 'a' + 10; \
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else \
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break; \
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\
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if (digit >= base) \
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break; \
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\
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last_value = value; \
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value = value * base + digit; \
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if (last_value > value) /* Overflow */ \
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return ERANGE; \
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\
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flag = 1; \
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ptr++; \
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} \
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\
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if (flag) \
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*result = value; \
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\
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if (endptr) \
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*endptr = (char *)(flag ? ptr : str); \
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\
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return 0; \
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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 rc; \
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\
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if (*str == '-') { \
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rc = ddi_strtou##type(str + 1, endptr, base, result); \
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if (!rc) { \
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if (*endptr == str + 1) \
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*endptr = (char *)str; \
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else \
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*result = -*result; \
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} \
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} else { \
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rc = ddi_strtou##type(str, endptr, base, result); \
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} \
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\
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return rc; \
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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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uint32_t
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zone_get_hostid(void *zone)
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{
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unsigned long hostid;
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/* Only the global zone is supported */
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ASSERT(zone == NULL);
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if (ddi_strtoul(hw_serial, NULL, HW_HOSTID_LEN-1, &hostid) != 0)
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return HW_INVALID_HOSTID;
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return (uint32_t)hostid;
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}
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EXPORT_SYMBOL(zone_get_hostid);
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#ifdef HAVE_KALLSYMS_LOOKUP_NAME
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#define set_kallsyms_lookup_name() (0)
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#else
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/*
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* Because kallsyms_lookup_name() is no longer exported in the
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* mainline kernel we are forced to resort to somewhat drastic
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* measures. This function replaces the functionality by performing
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* an upcall to user space where /proc/kallsyms is consulted for
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* the requested address.
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*/
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#define GET_KALLSYMS_ADDR_CMD \
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"awk '{ if ( $3 == \"kallsyms_lookup_name\") { print $1 } }' " \
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"/proc/kallsyms >/proc/sys/kernel/spl/kallsyms_lookup_name"
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static int
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set_kallsyms_lookup_name(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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GET_KALLSYMS_ADDR_CMD,
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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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int rc;
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rc = call_usermodehelper(sh_path, argv, envp, 1);
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if (rc)
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return rc;
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return spl_kmem_init_kallsyms_lookup();
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}
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#endif
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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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if ((rc = set_kallsyms_lookup_name()))
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GOTO(out7, rc = -EADDRNOTAVAIL);
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printk("SPL: Loaded Solaris Porting Layer v%s\n", SPL_META_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", SPL_META_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", SPL_META_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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