.conf /tmp/fsmount 问题1：root用户无法访问挂载目录 测试发现client mount进程是哪个用户启动的就只有该用户(filesystem owner)可以访问该目录，即使挂载点mode是777。 # filesystem owner wanghai01@pubbeta1-nostest2:/tmp$ ls -l | grep fsmount drwxrwxrwx 0 p# cd fsmount bash: cd: fsmount: Permission denied© XXX Page 4 of 33 查阅资料发现这是fuse的一种安全策略，默认是只有filesystem owner拥有该文件系统的访问权限，如果想要其他用户有权访问，需要在挂载参数中指定‘-o allow-root’ 或'-o allow-other'以允许相应用户有权访问该文件系统，如果挂 This option overrides the security measure restricting file access to the filesystem owner, so that all users (including root) can access the files. allow_root

filtered out / handled by the kernel. Access modes (O_RDONLY, O_WRONLY, O_RDWR) should be used by the filesystem to check if the operation is permitted. If the -o default_permissions mount option is given, this open() and may thus be omitted by the filesystem. When writeback caching is enabled, the kernel may send read requests even for files opened with O_WRONLY. The filesystem should be prepared to handle this this. When writeback caching is disabled, the filesystem is expected to properly handle the O_APPEND flag and ensure that each write is appending to the end of the file. When writeback caching is enabled,