![Martin Schwidefsky](/assets/img/avatar_default.png)
Use nonseekable_open for a couple of s390 device drivers. This avoids the use of default_llseek function which has a dependency on the BKL. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
761 lines
17 KiB
C
761 lines
17 KiB
C
/*
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* zcore module to export memory content and register sets for creating system
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* dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same
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* dump format as s390 standalone dumps.
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*
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* For more information please refer to Documentation/s390/zfcpdump.txt
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*
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* Copyright IBM Corp. 2003,2008
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* Author(s): Michael Holzheu
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*/
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#define KMSG_COMPONENT "zdump"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/miscdevice.h>
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#include <linux/debugfs.h>
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#include <asm/asm-offsets.h>
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#include <asm/ipl.h>
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#include <asm/sclp.h>
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#include <asm/setup.h>
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#include <asm/sigp.h>
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#include <asm/uaccess.h>
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#include <asm/debug.h>
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#include <asm/processor.h>
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#include <asm/irqflags.h>
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#include <asm/checksum.h>
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#include "sclp.h"
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#define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x)
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#define TO_USER 0
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#define TO_KERNEL 1
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#define CHUNK_INFO_SIZE 34 /* 2 16-byte char, each followed by blank */
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enum arch_id {
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ARCH_S390 = 0,
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ARCH_S390X = 1,
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};
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/* dump system info */
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struct sys_info {
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enum arch_id arch;
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unsigned long sa_base;
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u32 sa_size;
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int cpu_map[NR_CPUS];
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unsigned long mem_size;
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struct save_area lc_mask;
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};
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struct ipib_info {
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unsigned long ipib;
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u32 checksum;
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} __attribute__((packed));
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static struct sys_info sys_info;
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static struct debug_info *zcore_dbf;
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static int hsa_available;
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static struct dentry *zcore_dir;
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static struct dentry *zcore_file;
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static struct dentry *zcore_memmap_file;
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static struct dentry *zcore_reipl_file;
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static struct ipl_parameter_block *ipl_block;
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/*
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* Copy memory from HSA to kernel or user memory (not reentrant):
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*
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* @dest: Kernel or user buffer where memory should be copied to
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* @src: Start address within HSA where data should be copied
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* @count: Size of buffer, which should be copied
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* @mode: Either TO_KERNEL or TO_USER
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*/
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static int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode)
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{
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int offs, blk_num;
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static char buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
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if (count == 0)
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return 0;
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/* copy first block */
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offs = 0;
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if ((src % PAGE_SIZE) != 0) {
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blk_num = src / PAGE_SIZE + 2;
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if (sclp_sdias_copy(buf, blk_num, 1)) {
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TRACE("sclp_sdias_copy() failed\n");
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return -EIO;
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}
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offs = min((PAGE_SIZE - (src % PAGE_SIZE)), count);
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if (mode == TO_USER) {
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if (copy_to_user((__force __user void*) dest,
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buf + (src % PAGE_SIZE), offs))
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return -EFAULT;
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} else
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memcpy(dest, buf + (src % PAGE_SIZE), offs);
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}
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if (offs == count)
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goto out;
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/* copy middle */
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for (; (offs + PAGE_SIZE) <= count; offs += PAGE_SIZE) {
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blk_num = (src + offs) / PAGE_SIZE + 2;
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if (sclp_sdias_copy(buf, blk_num, 1)) {
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TRACE("sclp_sdias_copy() failed\n");
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return -EIO;
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}
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if (mode == TO_USER) {
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if (copy_to_user((__force __user void*) dest + offs,
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buf, PAGE_SIZE))
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return -EFAULT;
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} else
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memcpy(dest + offs, buf, PAGE_SIZE);
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}
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if (offs == count)
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goto out;
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/* copy last block */
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blk_num = (src + offs) / PAGE_SIZE + 2;
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if (sclp_sdias_copy(buf, blk_num, 1)) {
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TRACE("sclp_sdias_copy() failed\n");
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return -EIO;
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}
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if (mode == TO_USER) {
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if (copy_to_user((__force __user void*) dest + offs, buf,
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PAGE_SIZE))
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return -EFAULT;
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} else
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memcpy(dest + offs, buf, count - offs);
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out:
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return 0;
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}
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static int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count)
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{
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return memcpy_hsa((void __force *) dest, src, count, TO_USER);
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}
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static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
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{
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return memcpy_hsa(dest, src, count, TO_KERNEL);
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}
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static int memcpy_real_user(void __user *dest, unsigned long src, size_t count)
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{
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static char buf[4096];
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int offs = 0, size;
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while (offs < count) {
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size = min(sizeof(buf), count - offs);
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if (memcpy_real(buf, (void *) src + offs, size))
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return -EFAULT;
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if (copy_to_user(dest + offs, buf, size))
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return -EFAULT;
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offs += size;
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}
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return 0;
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}
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static int __init init_cpu_info(enum arch_id arch)
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{
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struct save_area *sa;
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/* get info for boot cpu from lowcore, stored in the HSA */
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sa = kmalloc(sizeof(*sa), GFP_KERNEL);
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if (!sa)
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return -ENOMEM;
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if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) {
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TRACE("could not copy from HSA\n");
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kfree(sa);
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return -EIO;
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}
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zfcpdump_save_areas[0] = sa;
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return 0;
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}
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static DEFINE_MUTEX(zcore_mutex);
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#define DUMP_VERSION 0x5
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#define DUMP_MAGIC 0xa8190173618f23fdULL
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#define DUMP_ARCH_S390X 2
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#define DUMP_ARCH_S390 1
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#define HEADER_SIZE 4096
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/* dump header dumped according to s390 crash dump format */
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struct zcore_header {
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u64 magic;
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u32 version;
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u32 header_size;
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u32 dump_level;
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u32 page_size;
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u64 mem_size;
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u64 mem_start;
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u64 mem_end;
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u32 num_pages;
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u32 pad1;
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u64 tod;
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struct cpuid cpu_id;
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u32 arch_id;
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u32 volnr;
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u32 build_arch;
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u64 rmem_size;
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u8 mvdump;
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u16 cpu_cnt;
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u16 real_cpu_cnt;
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u8 end_pad1[0x200-0x061];
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u64 mvdump_sign;
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u64 mvdump_zipl_time;
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u8 end_pad2[0x800-0x210];
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u32 lc_vec[512];
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} __attribute__((packed,__aligned__(16)));
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static struct zcore_header zcore_header = {
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.magic = DUMP_MAGIC,
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.version = DUMP_VERSION,
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.header_size = 4096,
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.dump_level = 0,
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.page_size = PAGE_SIZE,
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.mem_start = 0,
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#ifdef CONFIG_64BIT
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.build_arch = DUMP_ARCH_S390X,
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#else
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.build_arch = DUMP_ARCH_S390,
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#endif
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};
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/*
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* Copy lowcore info to buffer. Use map in order to copy only register parts.
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*
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* @buf: User buffer
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* @sa: Pointer to save area
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* @sa_off: Offset in save area to copy
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* @len: Number of bytes to copy
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*/
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static int copy_lc(void __user *buf, void *sa, int sa_off, int len)
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{
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int i;
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char *lc_mask = (char*)&sys_info.lc_mask;
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for (i = 0; i < len; i++) {
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if (!lc_mask[i + sa_off])
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continue;
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if (copy_to_user(buf + i, sa + sa_off + i, 1))
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return -EFAULT;
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}
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return 0;
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}
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/*
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* Copy lowcores info to memory, if necessary
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*
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* @buf: User buffer
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* @addr: Start address of buffer in dump memory
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* @count: Size of buffer
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*/
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static int zcore_add_lc(char __user *buf, unsigned long start, size_t count)
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{
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unsigned long end;
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int i = 0;
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if (count == 0)
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return 0;
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end = start + count;
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while (zfcpdump_save_areas[i]) {
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unsigned long cp_start, cp_end; /* copy range */
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unsigned long sa_start, sa_end; /* save area range */
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unsigned long prefix;
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unsigned long sa_off, len, buf_off;
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prefix = zfcpdump_save_areas[i]->pref_reg;
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sa_start = prefix + sys_info.sa_base;
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sa_end = prefix + sys_info.sa_base + sys_info.sa_size;
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if ((end < sa_start) || (start > sa_end))
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goto next;
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cp_start = max(start, sa_start);
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cp_end = min(end, sa_end);
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buf_off = cp_start - start;
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sa_off = cp_start - sa_start;
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len = cp_end - cp_start;
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TRACE("copy_lc for: %lx\n", start);
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if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len))
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return -EFAULT;
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next:
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i++;
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}
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return 0;
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}
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/*
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* Read routine for zcore character device
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* First 4K are dump header
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* Next 32MB are HSA Memory
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* Rest is read from absolute Memory
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*/
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static ssize_t zcore_read(struct file *file, char __user *buf, size_t count,
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loff_t *ppos)
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{
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unsigned long mem_start; /* Start address in memory */
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size_t mem_offs; /* Offset in dump memory */
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size_t hdr_count; /* Size of header part of output buffer */
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size_t size;
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int rc;
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mutex_lock(&zcore_mutex);
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if (*ppos > (sys_info.mem_size + HEADER_SIZE)) {
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rc = -EINVAL;
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goto fail;
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}
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count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos));
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/* Copy dump header */
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if (*ppos < HEADER_SIZE) {
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size = min(count, (size_t) (HEADER_SIZE - *ppos));
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if (copy_to_user(buf, &zcore_header + *ppos, size)) {
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rc = -EFAULT;
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goto fail;
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}
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hdr_count = size;
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mem_start = 0;
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} else {
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hdr_count = 0;
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mem_start = *ppos - HEADER_SIZE;
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}
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mem_offs = 0;
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/* Copy from HSA data */
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if (*ppos < (ZFCPDUMP_HSA_SIZE + HEADER_SIZE)) {
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size = min((count - hdr_count), (size_t) (ZFCPDUMP_HSA_SIZE
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- mem_start));
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rc = memcpy_hsa_user(buf + hdr_count, mem_start, size);
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if (rc)
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goto fail;
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mem_offs += size;
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}
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/* Copy from real mem */
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size = count - mem_offs - hdr_count;
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rc = memcpy_real_user(buf + hdr_count + mem_offs, mem_start + mem_offs,
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size);
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if (rc)
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goto fail;
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/*
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* Since s390 dump analysis tools like lcrash or crash
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* expect register sets in the prefix pages of the cpus,
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* we copy them into the read buffer, if necessary.
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* buf + hdr_count: Start of memory part of output buffer
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* mem_start: Start memory address to copy from
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* count - hdr_count: Size of memory area to copy
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*/
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if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) {
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rc = -EFAULT;
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goto fail;
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}
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*ppos += count;
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fail:
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mutex_unlock(&zcore_mutex);
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return (rc < 0) ? rc : count;
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}
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static int zcore_open(struct inode *inode, struct file *filp)
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{
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if (!hsa_available)
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return -ENODATA;
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else
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return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
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}
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static int zcore_release(struct inode *inode, struct file *filep)
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{
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diag308(DIAG308_REL_HSA, NULL);
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hsa_available = 0;
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return 0;
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}
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static loff_t zcore_lseek(struct file *file, loff_t offset, int orig)
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{
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loff_t rc;
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mutex_lock(&zcore_mutex);
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switch (orig) {
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case 0:
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file->f_pos = offset;
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rc = file->f_pos;
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break;
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case 1:
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file->f_pos += offset;
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rc = file->f_pos;
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break;
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default:
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rc = -EINVAL;
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}
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mutex_unlock(&zcore_mutex);
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return rc;
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}
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static const struct file_operations zcore_fops = {
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.owner = THIS_MODULE,
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.llseek = zcore_lseek,
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.read = zcore_read,
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.open = zcore_open,
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.release = zcore_release,
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};
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static ssize_t zcore_memmap_read(struct file *filp, char __user *buf,
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size_t count, loff_t *ppos)
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{
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return simple_read_from_buffer(buf, count, ppos, filp->private_data,
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MEMORY_CHUNKS * CHUNK_INFO_SIZE);
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}
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static int zcore_memmap_open(struct inode *inode, struct file *filp)
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{
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int i;
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char *buf;
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struct mem_chunk *chunk_array;
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chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk),
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GFP_KERNEL);
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if (!chunk_array)
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return -ENOMEM;
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detect_memory_layout(chunk_array);
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buf = kzalloc(MEMORY_CHUNKS * CHUNK_INFO_SIZE, GFP_KERNEL);
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if (!buf) {
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kfree(chunk_array);
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return -ENOMEM;
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}
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for (i = 0; i < MEMORY_CHUNKS; i++) {
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sprintf(buf + (i * CHUNK_INFO_SIZE), "%016llx %016llx ",
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(unsigned long long) chunk_array[i].addr,
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(unsigned long long) chunk_array[i].size);
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if (chunk_array[i].size == 0)
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break;
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}
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kfree(chunk_array);
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filp->private_data = buf;
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return nonseekable_open(inode, filp);
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}
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static int zcore_memmap_release(struct inode *inode, struct file *filp)
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{
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kfree(filp->private_data);
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return 0;
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}
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static const struct file_operations zcore_memmap_fops = {
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.owner = THIS_MODULE,
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.read = zcore_memmap_read,
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.open = zcore_memmap_open,
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.release = zcore_memmap_release,
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};
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static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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if (ipl_block) {
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diag308(DIAG308_SET, ipl_block);
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diag308(DIAG308_IPL, NULL);
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}
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return count;
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}
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static int zcore_reipl_open(struct inode *inode, struct file *filp)
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{
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return nonseekable_open(inode, filp);
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}
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static int zcore_reipl_release(struct inode *inode, struct file *filp)
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{
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return 0;
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}
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static const struct file_operations zcore_reipl_fops = {
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.owner = THIS_MODULE,
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.write = zcore_reipl_write,
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.open = zcore_reipl_open,
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.release = zcore_reipl_release,
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};
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#ifdef CONFIG_32BIT
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static void __init set_lc_mask(struct save_area *map)
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{
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memset(&map->ext_save, 0xff, sizeof(map->ext_save));
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memset(&map->timer, 0xff, sizeof(map->timer));
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memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp));
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memset(&map->psw, 0xff, sizeof(map->psw));
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memset(&map->pref_reg, 0xff, sizeof(map->pref_reg));
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memset(&map->acc_regs, 0xff, sizeof(map->acc_regs));
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memset(&map->fp_regs, 0xff, sizeof(map->fp_regs));
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memset(&map->gp_regs, 0xff, sizeof(map->gp_regs));
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memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs));
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}
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#else /* CONFIG_32BIT */
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static void __init set_lc_mask(struct save_area *map)
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{
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memset(&map->fp_regs, 0xff, sizeof(map->fp_regs));
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memset(&map->gp_regs, 0xff, sizeof(map->gp_regs));
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memset(&map->psw, 0xff, sizeof(map->psw));
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memset(&map->pref_reg, 0xff, sizeof(map->pref_reg));
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memset(&map->fp_ctrl_reg, 0xff, sizeof(map->fp_ctrl_reg));
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memset(&map->tod_reg, 0xff, sizeof(map->tod_reg));
|
|
memset(&map->timer, 0xff, sizeof(map->timer));
|
|
memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp));
|
|
memset(&map->acc_regs, 0xff, sizeof(map->acc_regs));
|
|
memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs));
|
|
}
|
|
|
|
#endif /* CONFIG_32BIT */
|
|
|
|
/*
|
|
* Initialize dump globals for a given architecture
|
|
*/
|
|
static int __init sys_info_init(enum arch_id arch)
|
|
{
|
|
int rc;
|
|
|
|
switch (arch) {
|
|
case ARCH_S390X:
|
|
pr_alert("DETECTED 'S390X (64 bit) OS'\n");
|
|
break;
|
|
case ARCH_S390:
|
|
pr_alert("DETECTED 'S390 (32 bit) OS'\n");
|
|
break;
|
|
default:
|
|
pr_alert("0x%x is an unknown architecture.\n",arch);
|
|
return -EINVAL;
|
|
}
|
|
sys_info.sa_base = SAVE_AREA_BASE;
|
|
sys_info.sa_size = sizeof(struct save_area);
|
|
sys_info.arch = arch;
|
|
set_lc_mask(&sys_info.lc_mask);
|
|
rc = init_cpu_info(arch);
|
|
if (rc)
|
|
return rc;
|
|
sys_info.mem_size = real_memory_size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init check_sdias(void)
|
|
{
|
|
int rc, act_hsa_size;
|
|
|
|
rc = sclp_sdias_blk_count();
|
|
if (rc < 0) {
|
|
TRACE("Could not determine HSA size\n");
|
|
return rc;
|
|
}
|
|
act_hsa_size = (rc - 1) * PAGE_SIZE;
|
|
if (act_hsa_size < ZFCPDUMP_HSA_SIZE) {
|
|
TRACE("HSA size too small: %i\n", act_hsa_size);
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __init get_mem_size(unsigned long *mem)
|
|
{
|
|
int i;
|
|
struct mem_chunk *chunk_array;
|
|
|
|
chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk),
|
|
GFP_KERNEL);
|
|
if (!chunk_array)
|
|
return -ENOMEM;
|
|
detect_memory_layout(chunk_array);
|
|
for (i = 0; i < MEMORY_CHUNKS; i++) {
|
|
if (chunk_array[i].size == 0)
|
|
break;
|
|
*mem += chunk_array[i].size;
|
|
}
|
|
kfree(chunk_array);
|
|
return 0;
|
|
}
|
|
|
|
static int __init zcore_header_init(int arch, struct zcore_header *hdr)
|
|
{
|
|
int rc, i;
|
|
unsigned long memory = 0;
|
|
u32 prefix;
|
|
|
|
if (arch == ARCH_S390X)
|
|
hdr->arch_id = DUMP_ARCH_S390X;
|
|
else
|
|
hdr->arch_id = DUMP_ARCH_S390;
|
|
rc = get_mem_size(&memory);
|
|
if (rc)
|
|
return rc;
|
|
hdr->mem_size = memory;
|
|
hdr->rmem_size = memory;
|
|
hdr->mem_end = sys_info.mem_size;
|
|
hdr->num_pages = memory / PAGE_SIZE;
|
|
hdr->tod = get_clock();
|
|
get_cpu_id(&hdr->cpu_id);
|
|
for (i = 0; zfcpdump_save_areas[i]; i++) {
|
|
prefix = zfcpdump_save_areas[i]->pref_reg;
|
|
hdr->real_cpu_cnt++;
|
|
if (!prefix)
|
|
continue;
|
|
hdr->lc_vec[hdr->cpu_cnt] = prefix;
|
|
hdr->cpu_cnt++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Provide IPL parameter information block from either HSA or memory
|
|
* for future reipl
|
|
*/
|
|
static int __init zcore_reipl_init(void)
|
|
{
|
|
struct ipib_info ipib_info;
|
|
int rc;
|
|
|
|
rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info));
|
|
if (rc)
|
|
return rc;
|
|
if (ipib_info.ipib == 0)
|
|
return 0;
|
|
ipl_block = (void *) __get_free_page(GFP_KERNEL);
|
|
if (!ipl_block)
|
|
return -ENOMEM;
|
|
if (ipib_info.ipib < ZFCPDUMP_HSA_SIZE)
|
|
rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
|
|
else
|
|
rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE);
|
|
if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
|
|
ipib_info.checksum) {
|
|
TRACE("Checksum does not match\n");
|
|
free_page((unsigned long) ipl_block);
|
|
ipl_block = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __init zcore_init(void)
|
|
{
|
|
unsigned char arch;
|
|
int rc;
|
|
|
|
if (ipl_info.type != IPL_TYPE_FCP_DUMP)
|
|
return -ENODATA;
|
|
|
|
zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long));
|
|
debug_register_view(zcore_dbf, &debug_sprintf_view);
|
|
debug_set_level(zcore_dbf, 6);
|
|
|
|
TRACE("devno: %x\n", ipl_info.data.fcp.dev_id.devno);
|
|
TRACE("wwpn: %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn);
|
|
TRACE("lun: %llx\n", (unsigned long long) ipl_info.data.fcp.lun);
|
|
|
|
rc = sclp_sdias_init();
|
|
if (rc)
|
|
goto fail;
|
|
|
|
rc = check_sdias();
|
|
if (rc)
|
|
goto fail;
|
|
|
|
rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1);
|
|
if (rc)
|
|
goto fail;
|
|
|
|
#ifdef CONFIG_64BIT
|
|
if (arch == ARCH_S390) {
|
|
pr_alert("The 64-bit dump tool cannot be used for a "
|
|
"32-bit system\n");
|
|
rc = -EINVAL;
|
|
goto fail;
|
|
}
|
|
#else /* CONFIG_64BIT */
|
|
if (arch == ARCH_S390X) {
|
|
pr_alert("The 32-bit dump tool cannot be used for a "
|
|
"64-bit system\n");
|
|
rc = -EINVAL;
|
|
goto fail;
|
|
}
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
rc = sys_info_init(arch);
|
|
if (rc)
|
|
goto fail;
|
|
|
|
rc = zcore_header_init(arch, &zcore_header);
|
|
if (rc)
|
|
goto fail;
|
|
|
|
rc = zcore_reipl_init();
|
|
if (rc)
|
|
goto fail;
|
|
|
|
zcore_dir = debugfs_create_dir("zcore" , NULL);
|
|
if (!zcore_dir) {
|
|
rc = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL,
|
|
&zcore_fops);
|
|
if (!zcore_file) {
|
|
rc = -ENOMEM;
|
|
goto fail_dir;
|
|
}
|
|
zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir,
|
|
NULL, &zcore_memmap_fops);
|
|
if (!zcore_memmap_file) {
|
|
rc = -ENOMEM;
|
|
goto fail_file;
|
|
}
|
|
zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir,
|
|
NULL, &zcore_reipl_fops);
|
|
if (!zcore_reipl_file) {
|
|
rc = -ENOMEM;
|
|
goto fail_memmap_file;
|
|
}
|
|
hsa_available = 1;
|
|
return 0;
|
|
|
|
fail_memmap_file:
|
|
debugfs_remove(zcore_memmap_file);
|
|
fail_file:
|
|
debugfs_remove(zcore_file);
|
|
fail_dir:
|
|
debugfs_remove(zcore_dir);
|
|
fail:
|
|
diag308(DIAG308_REL_HSA, NULL);
|
|
return rc;
|
|
}
|
|
|
|
static void __exit zcore_exit(void)
|
|
{
|
|
debug_unregister(zcore_dbf);
|
|
sclp_sdias_exit();
|
|
free_page((unsigned long) ipl_block);
|
|
debugfs_remove(zcore_reipl_file);
|
|
debugfs_remove(zcore_memmap_file);
|
|
debugfs_remove(zcore_file);
|
|
debugfs_remove(zcore_dir);
|
|
diag308(DIAG308_REL_HSA, NULL);
|
|
}
|
|
|
|
MODULE_AUTHOR("Copyright IBM Corp. 2003,2008");
|
|
MODULE_DESCRIPTION("zcore module for zfcpdump support");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
subsys_initcall(zcore_init);
|
|
module_exit(zcore_exit);
|