Re: [PATCH 09/10] VFS: Remove read-only checks fromdentry_permission

[Dave Hansen]

On Mon, 2010-09-06 at 10:50 +1000, NeilBrown wrote:
> It is not sufficient to depend on the the "filesystem is readonly"
> tests in dentry_permission as it does not check if the vfsmnt is
> readonly.
> All call sites already call mnt_want_write or __mnt_is_readonly which
> includes the test on MS_RDONLY.
> 
> So remove this test from dentry_permission as it simply duplicates
> tests done elsewhere.

Yeah, I remember auditing all of the dentry_permission() callers and
moving them over to mnt_want_write() and friends as well.  I don't quite
remember why we didn't take this step back then, but it looks sane to
me.

-- Dave

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