内核钩子的作用范围？

[chelp]

全局还是某线程？不要让我不相信CSDN

[gqb666]

你说你加上最后一句，谁还乐意跟你交流哦！。我只说我接触到的，比较狭隘，仅对驱动代码里面的比较熟。

static const struct file_operations mem_fops = {
	.llseek		= memory_lseek,
	.read		= read_mem,
	.write		= write_mem,
	.mmap		= mmap_mem,
	.open		= open_mem,
	.get_unmapped_area = get_unmapped_area_mem,
};

static loff_t memory_lseek(struct file *file, loff_t offset, int orig)
{
	loff_t ret;

	mutex_lock(&file->f_path.dentry->d_inode->i_mutex);
	switch (orig) {
	case SEEK_CUR:
		offset += file->f_pos;
	case SEEK_SET:
		/* to avoid userland mistaking f_pos=-9 as -EBADF=-9 */
		if ((unsigned long long)offset >= ~0xFFFULL) {
			ret = -EOVERFLOW;
			break;
		}
		file->f_pos = offset;
		ret = file->f_pos;
		force_successful_syscall_return();
		break;
	default:
		ret = -EINVAL;
	}
	mutex_unlock(&file->f_path.dentry->d_inode->i_mutex);
	return ret;
}

……楼主应该明白了吧，不要让我不相信你！