unmount

init_caches() 初始化如下几个cache： ceph_inode_cachep ceph_cap_cachep ceph_cap_flush_cachep ceph_dentry_cachep ceph_file_cachep cephfs cache ceph_mount() |__解析mount options |__创建fs client，即：struct ceph_fs_client |__创建mds client且设置fs client和mds client之间的对应关系 |__得到superblock且使用ceph_set_super()函数初始化 |__调用ceph_real_mount()函数来执行实际的mount操作 ceph_real_mount() |__若superblock中对应的s_boot为空 |__调用__ceph_open_session()函数创建client到mds的session信息 |__调用open_root_dentry()函数得到cephfs的root dentry信息 |__将root dentry写入到superblock中的s_boot中 |__若mount options中没有server path内容 |__设置当前root为supberblock对应的s_root |__调用dget(root

How can I mount and unmount hard drives (platform independent, so no using Runtime to execute a hard-coded command) in the Java Programming Language? The answer is "Yes And No". You could not mount or unmount devices in java because each OS has their own methods to do this. BUT... you can provide java api that use adapter pattern for native interface. You should do some things: create Java interfaces that support mount/unmount commands create classes that implements interfaces as native methods create native implementations of this commands in C or other language. One implemantation for OS

I know this question has been asked a couple times already but most of the time, the solution is to handle this in the parent, as the flow of responsibility is only descending. However, sometimes, you need to kill a component from one of its methods. I know I can't modify its props, and If I start adding booleans as state, it's gonna start to be really messy for a simple component. Here is what Im trying to achieve : A small error box component, with an "x" to dismiss it. Receiving an error through its props will display it but I'd like a way to close it from its own code. class