* UCRL-CODE-235197
*
* This file is part of the SPL, Solaris Porting Layer.
- * For details, see <http://github.com/behlendorf/spl/>.
+ * For details, see <http://zfsonlinux.org/>.
*
* The SPL is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
#include <sys/sysmacros.h>
#include <sys/systeminfo.h>
#include <sys/vmsystm.h>
-#include <sys/vnode.h>
+#include <sys/kobj.h>
#include <sys/kmem.h>
#include <sys/mutex.h>
#include <sys/rwlock.h>
#include <sys/taskq.h>
#include <sys/tsd.h>
+#include <sys/zmod.h>
#include <sys/debug.h>
#include <sys/proc.h>
#include <sys/kstat.h>
-#include <sys/utsname.h>
#include <sys/file.h>
#include <linux/kmod.h>
#include <linux/proc_compat.h>
-#include <spl-debug.h>
-#ifdef SS_DEBUG_SUBSYS
-#undef SS_DEBUG_SUBSYS
-#endif
-
-#define SS_DEBUG_SUBSYS SS_GENERIC
-
-char spl_version[16] = "SPL v" SPL_META_VERSION;
+char spl_version[32] = "SPL v" SPL_META_VERSION "-" SPL_META_RELEASE;
EXPORT_SYMBOL(spl_version);
-long spl_hostid = 0;
+unsigned long spl_hostid = 0;
EXPORT_SYMBOL(spl_hostid);
-
-char hw_serial[HW_HOSTID_LEN] = "<none>";
-EXPORT_SYMBOL(hw_serial);
+module_param(spl_hostid, ulong, 0644);
+MODULE_PARM_DESC(spl_hostid, "The system hostid.");
proc_t p0 = { 0 };
EXPORT_SYMBOL(p0);
-#ifndef HAVE_KALLSYMS_LOOKUP_NAME
-kallsyms_lookup_name_t spl_kallsyms_lookup_name_fn = SYMBOL_POISON;
-#endif
-
-int
-highbit(unsigned long i)
-{
- register int h = 1;
- SENTRY;
-
- if (i == 0)
- SRETURN(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;
- }
- SRETURN(h);
-}
-EXPORT_SYMBOL(highbit);
-
#if BITS_PER_LONG == 32
/*
* Support 64/64 => 64 division on a 32-bit platform. While the kernel
q0 = q0 - 1; // too small by 1.
if ((u - q0 * v) >= v)
q0 = q0 + 1; // Now q0 is correct.
-
+
return q0;
}
}
}
EXPORT_SYMBOL(__umoddi3);
+#if defined(__arm) || defined(__arm__)
+/*
+ * Implementation of 64-bit (un)signed division for 32-bit arm machines.
+ *
+ * Run-time ABI for the ARM Architecture (page 20). A pair of (unsigned)
+ * long longs is returned in {{r0, r1}, {r2,r3}}, the quotient in {r0, r1},
+ * and the remainder in {r2, r3}. The return type is specifically left
+ * set to 'void' to ensure the compiler does not overwrite these registers
+ * during the return. All results are in registers as per ABI
+ */
+void
+__aeabi_uldivmod(uint64_t u, uint64_t v)
+{
+ uint64_t res;
+ uint64_t mod;
+
+ res = __udivdi3(u, v);
+ mod = __umoddi3(u, v);
+ {
+ register uint32_t r0 asm("r0") = (res & 0xFFFFFFFF);
+ register uint32_t r1 asm("r1") = (res >> 32);
+ register uint32_t r2 asm("r2") = (mod & 0xFFFFFFFF);
+ register uint32_t r3 asm("r3") = (mod >> 32);
+
+ asm volatile(""
+ : "+r"(r0), "+r"(r1), "+r"(r2),"+r"(r3) /* output */
+ : "r"(r0), "r"(r1), "r"(r2), "r"(r3)); /* input */
+
+ return; /* r0; */
+ }
+}
+EXPORT_SYMBOL(__aeabi_uldivmod);
+
+void
+__aeabi_ldivmod(int64_t u, int64_t v)
+{
+ int64_t res;
+ uint64_t mod;
+
+ res = __divdi3(u, v);
+ mod = __umoddi3(u, v);
+ {
+ register uint32_t r0 asm("r0") = (res & 0xFFFFFFFF);
+ register uint32_t r1 asm("r1") = (res >> 32);
+ register uint32_t r2 asm("r2") = (mod & 0xFFFFFFFF);
+ register uint32_t r3 asm("r3") = (mod >> 32);
+
+ asm volatile(""
+ : "+r"(r0), "+r"(r1), "+r"(r2),"+r"(r3) /* output */
+ : "r"(r0), "r"(r1), "r"(r2), "r"(r3)); /* input */
+
+ return; /* r0; */
+ }
+}
+EXPORT_SYMBOL(__aeabi_ldivmod);
+#endif /* __arm || __arm__ */
#endif /* BITS_PER_LONG */
/* NOTE: The strtoxx behavior is solely based on my reading of the Solaris
EXPORT_SYMBOL(__put_task_struct);
#endif /* HAVE_PUT_TASK_STRUCT */
-struct new_utsname *__utsname(void)
-{
-#ifdef HAVE_INIT_UTSNAME
- return init_utsname();
-#else
- return &system_utsname;
-#endif
-}
-EXPORT_SYMBOL(__utsname);
+/*
+ * Read the unique system identifier from the /etc/hostid file.
+ *
+ * The behavior of /usr/bin/hostid on Linux systems with the
+ * regular eglibc and coreutils is:
+ *
+ * 1. Generate the value if the /etc/hostid file does not exist
+ * or if the /etc/hostid file is less than four bytes in size.
+ *
+ * 2. If the /etc/hostid file is at least 4 bytes, then return
+ * the first four bytes [0..3] in native endian order.
+ *
+ * 3. Always ignore bytes [4..] if they exist in the file.
+ *
+ * Only the first four bytes are significant, even on systems that
+ * have a 64-bit word size.
+ *
+ * See:
+ *
+ * eglibc: sysdeps/unix/sysv/linux/gethostid.c
+ * coreutils: src/hostid.c
+ *
+ * Notes:
+ *
+ * The /etc/hostid file on Solaris is a text file that often reads:
+ *
+ * # DO NOT EDIT
+ * "0123456789"
+ *
+ * Directly copying this file to Linux results in a constant
+ * hostid of 4f442023 because the default comment constitutes
+ * the first four bytes of the file.
+ *
+ */
+
+char *spl_hostid_path = HW_HOSTID_PATH;
+module_param(spl_hostid_path, charp, 0444);
+MODULE_PARM_DESC(spl_hostid_path, "The system hostid file (/etc/hostid)");
static int
-set_hostid(void)
+hostid_read(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 };
- int rc;
-
- /* 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 horrific solution but it will do for now.
- */
- rc = call_usermodehelper(sh_path, argv, envp, 1);
- if (rc)
- printk("SPL: Failed user helper '%s %s %s', rc = %d\n",
- argv[0], argv[1], argv[2], rc);
+ int result;
+ uint64_t size;
+ struct _buf *file;
+ uint32_t hostid = 0;
- return rc;
+ file = kobj_open_file(spl_hostid_path);
+
+ if (file == (struct _buf *)-1)
+ return -1;
+
+ result = kobj_get_filesize(file, &size);
+
+ if (result != 0) {
+ printk(KERN_WARNING
+ "SPL: kobj_get_filesize returned %i on %s\n",
+ result, spl_hostid_path);
+ kobj_close_file(file);
+ return -2;
+ }
+
+ if (size < sizeof(HW_HOSTID_MASK)) {
+ printk(KERN_WARNING
+ "SPL: Ignoring the %s file because it is %llu bytes; "
+ "expecting %lu bytes instead.\n", spl_hostid_path,
+ size, (unsigned long)sizeof(HW_HOSTID_MASK));
+ kobj_close_file(file);
+ return -3;
+ }
+
+ /* Read directly into the variable like eglibc does. */
+ /* Short reads are okay; native behavior is preserved. */
+ result = kobj_read_file(file, (char *)&hostid, sizeof(hostid), 0);
+
+ if (result < 0) {
+ printk(KERN_WARNING
+ "SPL: kobj_read_file returned %i on %s\n",
+ result, spl_hostid_path);
+ kobj_close_file(file);
+ return -4;
+ }
+
+ /* Mask down to 32 bits like coreutils does. */
+ spl_hostid = hostid & HW_HOSTID_MASK;
+ kobj_close_file(file);
+ return 0;
}
uint32_t
zone_get_hostid(void *zone)
{
- unsigned long hostid;
+ static int first = 1;
/* Only the global zone is supported */
ASSERT(zone == NULL);
- if (ddi_strtoul(hw_serial, NULL, HW_HOSTID_LEN-1, &hostid) != 0)
- return HW_INVALID_HOSTID;
-
- return (uint32_t)hostid;
-}
-EXPORT_SYMBOL(zone_get_hostid);
+ if (first) {
+ first = 0;
-#ifndef HAVE_KALLSYMS_LOOKUP_NAME
-/*
- * Because kallsyms_lookup_name() is no longer exported in the
- * mainline kernel we are forced to resort to somewhat drastic
- * measures. This function replaces the functionality by performing
- * an upcall to user space where /proc/kallsyms is consulted for
- * the requested address.
- */
-#define GET_KALLSYMS_ADDR_CMD \
- "gawk '{ if ( $3 == \"kallsyms_lookup_name\") { print $1 } }' " \
- "/proc/kallsyms >/proc/sys/kernel/spl/kallsyms_lookup_name"
+ /*
+ * Get the hostid if it was not passed as a module parameter.
+ * Try reading the /etc/hostid file directly.
+ */
+ if (hostid_read())
+ spl_hostid = 0;
-static int
-set_kallsyms_lookup_name(void)
-{
- char sh_path[] = "/bin/sh";
- char *argv[] = { sh_path,
- "-c",
- GET_KALLSYMS_ADDR_CMD,
- NULL };
- char *envp[] = { "HOME=/",
- "TERM=linux",
- "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
- NULL };
- int rc;
-
- rc = call_usermodehelper(sh_path, argv, envp, 1);
- if (rc)
- printk("SPL: Failed user helper '%s %s %s', rc = %d\n",
- argv[0], argv[1], argv[2], rc);
+ printk(KERN_NOTICE "SPL: using hostid 0x%08x\n",
+ (unsigned int) spl_hostid);
+ }
- return rc;
+ return spl_hostid;
}
-#endif
+EXPORT_SYMBOL(zone_get_hostid);
static int
__init spl_init(void)
{
int rc = 0;
- if ((rc = debug_init()))
- return rc;
-
if ((rc = spl_kmem_init()))
- SGOTO(out1, rc);
+ goto out1;
if ((rc = spl_mutex_init()))
- SGOTO(out2, rc);
+ goto out2;
if ((rc = spl_rw_init()))
- SGOTO(out3, rc);
+ goto out3;
if ((rc = spl_taskq_init()))
- SGOTO(out4, rc);
-
- if ((rc = vn_init()))
- SGOTO(out5, rc);
+ goto out4;
- if ((rc = proc_init()))
- SGOTO(out6, rc);
+ if ((rc = spl_vn_init()))
+ goto out5;
- if ((rc = kstat_init()))
- SGOTO(out7, rc);
+ if ((rc = spl_proc_init()))
+ goto out6;
- if ((rc = tsd_init()))
- SGOTO(out8, rc);
+ if ((rc = spl_kstat_init()))
+ goto out7;
- if ((rc = set_hostid()))
- SGOTO(out9, rc = -EADDRNOTAVAIL);
+ if ((rc = spl_tsd_init()))
+ goto out8;
-#ifndef HAVE_KALLSYMS_LOOKUP_NAME
- if ((rc = set_kallsyms_lookup_name()))
- SGOTO(out9, rc = -EADDRNOTAVAIL);
-#endif /* HAVE_KALLSYMS_LOOKUP_NAME */
+ if ((rc = spl_zlib_init()))
+ goto out9;
- if ((rc = spl_kmem_init_kallsyms_lookup()))
- SGOTO(out9, rc);
+ printk(KERN_NOTICE "SPL: Loaded module v%s-%s%s\n", SPL_META_VERSION,
+ SPL_META_RELEASE, SPL_DEBUG_STR);
+ return (rc);
- printk(KERN_NOTICE "SPL: Loaded Solaris Porting Layer v%s%s\n",
- SPL_META_VERSION, SPL_DEBUG_STR);
- SRETURN(rc);
out9:
- tsd_fini();
+ spl_tsd_fini();
out8:
- kstat_fini();
+ spl_kstat_fini();
out7:
- proc_fini();
+ spl_proc_fini();
out6:
- vn_fini();
+ spl_vn_fini();
out5:
spl_taskq_fini();
out4:
out2:
spl_kmem_fini();
out1:
- debug_fini();
+ printk(KERN_NOTICE "SPL: Failed to Load Solaris Porting Layer "
+ "v%s-%s%s, rc = %d\n", SPL_META_VERSION, SPL_META_RELEASE,
+ SPL_DEBUG_STR, rc);
- printk(KERN_NOTICE "SPL: Failed to Load Solaris Porting Layer v%s%s"
- ", rc = %d\n", SPL_META_VERSION, SPL_DEBUG_STR, rc);
return rc;
}
static void
spl_fini(void)
{
- SENTRY;
-
- printk(KERN_NOTICE "SPL: Unloaded Solaris Porting Layer v%s%s\n",
- SPL_META_VERSION, SPL_DEBUG_STR);
- tsd_fini();
- kstat_fini();
- proc_fini();
- vn_fini();
+ printk(KERN_NOTICE "SPL: Unloaded module v%s-%s%s\n",
+ SPL_META_VERSION, SPL_META_RELEASE, SPL_DEBUG_STR);
+ spl_zlib_fini();
+ spl_tsd_fini();
+ spl_kstat_fini();
+ spl_proc_fini();
+ spl_vn_fini();
spl_taskq_fini();
spl_rw_fini();
spl_mutex_fini();
spl_kmem_fini();
- debug_fini();
}
/* Called when a dependent module is loaded */
module_init(spl_init);
module_exit(spl_fini);
-MODULE_AUTHOR("Lawrence Livermore National Labs");
MODULE_DESCRIPTION("Solaris Porting Layer");
-MODULE_LICENSE("GPL");
+MODULE_AUTHOR(SPL_META_AUTHOR);
+MODULE_LICENSE(SPL_META_LICENSE);
+MODULE_VERSION(SPL_META_VERSION "-" SPL_META_RELEASE);
projects / mirror_spl.git / blobdiff