Re: [fuse-devel] a fuse permission problem

[Sven U. <sve...@gm...>]

Hello 张本龙,

>     I've mounted the file system to point /tmp/fs/user1/mount, 

Did you use -o allow_root and or -o allow other?  What user did the
mounting?  Did you verify that you can indeed create/modify a file
there?

> and then took it as the root directory with command "chroot" in the
> terminal. Then the command "echo somechars > /dev/null" unexpectedly
> returned "permission denied",

Well, my best bet on what happened is that you did not specify
allow_root and allow other...

> but what made me more surprised was that the the debugging info of
> my own file system showed that none of my interfaces was invoked,
> like fs_getattr, fs_statfs, how was the "perssion denied" returned?

My best guess here is that with -o default_permissions enabled,
permission checking was done by the kernel.

Sven
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