公开(公告)号：US20140222879A1

公开(公告)日：2014-08-07

申请号：US13757630

申请日：2013-02-01

Applicant: APPLE INC.

Inventor： William L. RICKER ,  Guy HARRIS ,  George K. COLLEY

IPC: G06F17/30

CPC classification number: G06F16/182

Abstract: The invention provides a technique for managing hard-mounted network file systems (NFSs). First, a network file system (NFS) interface detects that a hard-mounted NFS is inaccessible. In response, the NFS interface obtains a list of virtual nodes (vNodes) associated with the hard-mounted NFS. If the NFS interface determines that each vNode in the list of vNodes is only associated with a read IN/OUT (I/O) operation, then the NFS interface automatically unmounts the hard-mounted NFS since doing so does not compromise the coherency of the hard-mounted NFS. Alternatively, if the NFS interface determines that at least one vNode in the list of vNodes is associated with data that is open for a write I/O operation, is mapped into a memory, or is associated with at least one dirty page, then the NFS interface does not unmount the hard-mounted NFS since doing so will compromise the coherency of the hard-mounted NFS.

Abstract translation: 本发明提供了一种用于管理硬安装的网络文件系统（NFS）的技术。 首先，网络文件系统（NFS）接口检测到硬安装的NFS是无法访问的。 作为响应，NFS接口获取与硬安装NFS相关联的虚拟节点（vNodes）列表。 如果NFS接口确定vNodes列表中的每个vNode仅与读/写（I / O）操作相关联，那么NFS接口将自动卸载硬安装的NFS，因为这样做不会损害该连接的一致性 硬安装的NFS。 或者，如果NFS接口确定vNodes列表中的至少一个vNode与为写入I / O操作打开的数据相关联，则被映射到存储器中，或者与至少一个脏页面相关联，则 NFS接口不会卸载硬安装的NFS，因为这样做会损害硬安装的NFS的一致性。