static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
struct f2fs_sb_info *sbi, char *buf)
{
unsigned char *ptr = NULL;
unsigned int *ui;
ptr = __struct_ptr(sbi, a->struct_type);
if (!ptr)
return -EINVAL;
ui = (unsigned int *)(ptr + a->offset);
return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
}
static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
struct f2fs_sb_info *sbi,
const char *buf, size_t count)
{
unsigned char *ptr;
unsigned long t;
unsigned int *ui;
ssize_t ret;
ptr = __struct_ptr(sbi, a->struct_type);
if (!ptr)
return -EINVAL;
ui = (unsigned int *)(ptr + a->offset);
ret = kstrtoul(skip_spaces(buf), 0, &t);
if (ret < 0)
return ret;
*ui = t;
return count;
}
static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
struct f2fs_sb_info *sbi,
const char *buf, size_t count)
{
unsigned char *ptr;
unsigned long t;
unsigned int *ui;
ssize_t ret;
ptr = __struct_ptr(sbi, a->struct_type);
if (!ptr)
return -EINVAL;
ui = (unsigned int *)(ptr + a->offset);
ret = kstrtoul(skip_spaces(buf), 0, &t);
if (ret < 0)
return ret;
#ifdef CONFIG_F2FS_FAULT_INJECTION
if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
return -EINVAL;
#endif
if (a->struct_type == RESERVED_BLOCKS) {
spin_lock(&sbi->stat_lock);
if ((unsigned long)sbi->total_valid_block_count + t >
(unsigned long)sbi->user_block_count) {
spin_unlock(&sbi->stat_lock);
return -EINVAL;
}
*ui = t;
spin_unlock(&sbi->stat_lock);
return count;
}
if (!strcmp(a->attr.name, "discard_granularity")) {
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
int i;
if (t == 0 || t > MAX_PLIST_NUM)
return -EINVAL;
if (t == *ui)
return count;
mutex_lock(&dcc->cmd_lock);
for (i = 0; i < MAX_PLIST_NUM; i++) {
if (i >= t - 1)
dcc->pend_list_tag[i] |= P_ACTIVE;
else
dcc->pend_list_tag[i] &= (~P_ACTIVE);
}
mutex_unlock(&dcc->cmd_lock);
*ui = t;
return count;
}
*ui = t;
if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
f2fs_reset_iostat(sbi);
if (!strcmp(a->attr.name, "gc_urgent") && t == 1 && sbi->gc_thread) {
sbi->gc_thread->gc_wake = 1;
wake_up_interruptible_all(&sbi->gc_thread->gc_wait_queue_head);
wake_up_discard_thread(sbi, true);
}
return count;
}
