The iocb argument can usually be treated as an opaque cookie used by the AIO subsystem; if you need the struct file pointer for this file descriptor, however, you can find it as iocb->ki_filp.

通常可以把iocb看作AIO子系统使用的不透明数据结构。 然而，如果需要文件描述符的struct file指针，可以通过iocb->ki_flip获取。

youdao

This system call requires the file descriptor from shm_open and returns a pointer to memory.

这个系统调用需要shm_open返回的文件描述符，它返回指向内存的指针。

youdao

fd is the file descriptor, a pointer to the file. For this example, use the following

fd 是文件描述符，是指向文件的一个指针。

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