static void last_kmsg_work_function(struct work_struct *dat)
{
#define SWR_SYS_RST_STA (1<<13)
#define WDT_SYS_RST_STA (1<<12)
char *buffer;
struct file *fp;
struct file *fp_proc;
mm_segment_t old_fs;
ssize_t result;
printk(KERN_INFO "dump last_kmsg starting\n");
buffer=kmalloc(SZ_1M, GFP_KERNEL);
if(!buffer){
printk(KERN_ERR "last_kmsg_work_function:alloc buffer fail!\n");
return;
}
if (last_kmsg_log_filename() < 0){
printk(KERN_ERR "%s folder doesn't exist, and create fail !\n", DATA_LOGS);
kfree(buffer);
return ;
}
last_kmsg_get_time();
strcat(rd_log_file, rd_kernel_time);
if (boot_reason==WDT_SYS_RST_STA)
strcat(rd_log_file,".log_wdt");
else if (boot_reason==SWR_SYS_RST_STA && is_panic())
strcat(rd_log_file,".log_panic");
#ifdef CONFIG_DEBUG_SLAB
else if (boot_reason==SWR_SYS_RST_STA )
strcat(rd_log_file,".log_reboot");
else
strcat(rd_log_file,".log_hwreset");
#endif
old_fs = get_fs();
set_fs(KERNEL_DS);
fp_proc = filp_open("/proc/last_kmsg" , O_APPEND | O_RDWR | O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO);
if (PTR_ERR(fp_proc) == -ENOENT){
printk(KERN_INFO "last_kmsg_work_function:last_kmsg is empty!\n");
set_fs(old_fs);
kfree(buffer);
return ;
}
fp = filp_open(rd_log_file , O_APPEND | O_RDWR | O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO);
if (PTR_ERR(fp) == -ENOENT){
filp_close(fp_proc,NULL);
set_fs(old_fs);
kfree(buffer);
return ;
}
result=vfs_read(fp_proc, buffer, SZ_1M, &fp_proc->f_pos);
if( result < 0 ){
printk(KERN_INFO "last_kmsg_work_function:read last_kmsg fail!\n");
}else{
result=vfs_write(fp, buffer, result, &fp->f_pos);
if( result < 0 )
printk(KERN_INFO "last_kmsg_work_function:write last_kmsg fail!\n");
}
filp_close(fp_proc,NULL);
filp_close(fp,NULL);
set_fs(old_fs);
kfree(buffer);
printk(KERN_INFO "last_kmsg file: %s\n", rd_log_file);
return;
}
static void last_kmsg_work_function(struct work_struct *dat)
{
char *buffer;
struct file *fp;
struct file *fp_proc;
struct file *fp_mounts;
mm_segment_t old_fs;
ssize_t result;
//**************************************
//mmcblk0p8 just for t30 branch
//**************************************
char mount_point[32] = "mmcblk0p8";
#define PMC_RST_STATUS_WDT (1)
#define PMC_RST_STATUS_SW (3)
printk(KERN_INFO "dump last_kmsg starting\n");
buffer=kmalloc(SZ_1M, GFP_KERNEL);
memset(buffer, 0, SZ_1M);
if(!buffer){
printk(KERN_INFO "last_kmsg_work_function:alloc buffer fail!\n");
return;
}
if (last_kmsg_log_filename() < 0){
printk(KERN_INFO "%s folder doesn't exist, and create fail !\n", DATA_LOGS);
kfree(buffer);
return ;
}
old_fs = get_fs();
set_fs(KERNEL_DS);
while(1)
{
fp_mounts = filp_open("/proc/mounts" , O_RDONLY, 0);
if (PTR_ERR(fp_mounts) == -ENOENT)
{
printk(KERN_INFO "last_kmsg_work_function:open /proc/mounts fail!\n");
msleep(1000);
}
else
{
vfs_read(fp_mounts, buffer, SZ_1M, &fp_mounts->f_pos);
if(!strstr(buffer, mount_point))
{
printk(KERN_INFO "last_kmsg_work_function:mmcblk0p8 was not mounted yet!\n");
filp_close(fp_mounts,NULL);
msleep(1000);
}
else
{
break;
}
}
}
memset(buffer, 0, SZ_1M);
last_kmsg_get_time();
strcat(rd_log_file, rd_kernel_time);
if (boot_reason==PMC_RST_STATUS_WDT)
{
strcat(rd_log_file,".log_wdt");
}
else if (boot_reason==PMC_RST_STATUS_SW )
{
strcat(rd_log_file,".log_SwReboot");
}
else
{
strcat(rd_log_file,".log_normal");
}
fp_proc = filp_open("/proc/last_kmsg" , O_RDONLY, 0);
if (PTR_ERR(fp_proc) == -ENOENT)
{
printk(KERN_INFO "last_kmsg_work_function:last_kmsg is empty!\n");
filp_close(fp_mounts,NULL);
set_fs(old_fs);
kfree(buffer);
return ;
}
fp = filp_open(rd_log_file , O_APPEND | O_RDWR | O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO);
if (PTR_ERR(fp) == -ENOENT)
{
printk(KERN_INFO "last_kmsg_work_function:open log file fail!\n");
filp_close(fp_mounts,NULL);
filp_close(fp_proc,NULL);
set_fs(old_fs);
kfree(buffer);
return ;
}
result=vfs_read(fp_proc, buffer, SZ_1M, &fp_proc->f_pos);
if( result < 0 )
{
printk(KERN_INFO "last_kmsg_work_function:read last_kmsg fail!\n");
}
else
{
result=vfs_write(fp, buffer, result, &fp->f_pos);
if( result < 0 )
printk(KERN_INFO "last_kmsg_work_function:write last_kmsg fail!\n");
}
filp_close(fp_mounts,NULL);
filp_close(fp_proc,NULL);
filp_close(fp,NULL);
set_fs(old_fs);
kfree(buffer);
printk(KERN_INFO "last_kmsg file: %s\n", rd_log_file);
return;
}
