Re: [PATCH v2] CIFS: display noacl in the mount options

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On Wed, Apr 10, 2019 at 4:46 AM Xiaoli Feng <xifeng@xxxxxxxxxx> wrote:
>
>
> Maybe we should change the option "acl|noacl" to "posixacl|noposixacl".

That could be better although I lean toward waiting until we
experiment a little more with the SMB3.1.1 POSIX Extensions and any
additional mount options for them.


> ----- Original Message -----
> > From: "Xiaoli Feng" <xifeng@xxxxxxxxxx>
> > To: "Steve French" <smfrench@xxxxxxxxx>
> > Cc: "CIFS" <linux-cifs@xxxxxxxxxxxxxxx>, "fengxiaoli0714@xxxxxxxx" <fengxiaoli0714@xxxxxxxxx>
> > Sent: Wednesday, April 10, 2019 11:40:16 AM
> > Subject: Re: [PATCH v2] CIFS: display noacl in the mount options
> >
> > Yes, could get users confused. But from the Man page:
> >
> >        noacl  Do not allow POSIX ACL operations even if server would support
> >        them.
> >               The  CIFS  client  can get and set POSIX ACLs (getfacl,
> >               setfacl) to Samba servers version 3.0.10 and later. Setting
> >               POSIX ACLs requires enabling both CIFS_XATTR and then
> >               CIFS_POSIX support in the CIFS configuration options when
> >               building the cifs module. POSIX ACL support can be disabled on
> >               a per mount basis by specifying noacl on mount.
> >
> >        cifsacl
> >               This option is used to map CIFS/NTFS ACLs to/from Linux
> >               permission bits, map SIDs to/from UIDs and GIDs, and get and
> >               set Security Descriptors.
> >               See section on CIFS/NTFS ACL, SID/UID/GID MAPPING, SECURITY
> >               DESCRIPTORS for more information.
> >
> > These two options are for different ACL. There is still a option "acl". It
> > also can be mounted with cifsacl together for SMB1.0.
> > There are some errors in my commit log. Should say "smb2.0+ don't support
> > POSIX ACL". What do you think about this patch? It also
> > makes sense if doesn't display "noacl".
> >
> > ----- Original Message -----
> > > From: "Steve French" <smfrench@xxxxxxxxx>
> > > To: "XiaoLi Feng" <xifeng@xxxxxxxxxx>
> > > Cc: "CIFS" <linux-cifs@xxxxxxxxxxxxxxx>, "fengxiaoli0714@xxxxxxxx"
> > > <fengxiaoli0714@xxxxxxxxx>
> > > Sent: Wednesday, April 10, 2019 10:56:19 AM
> > > Subject: Re: [PATCH v2] CIFS: display noacl in the mount options
> > >
> > > Could this get users confused who mount with "cifsacl" and see "noacl" as
> > > well?
> > >
> > > Also this is really saying no support for "POSIX (draft standard) ACL
> > > support" not no support for SMB3 ACL (or similarly "RichACL" or NFS
> > > ACL or ... NTFS ACL or ... which are somewhat similar and common).
> > >
> > > Could get confusing
> > >
> > > On Tue, Apr 9, 2019 at 8:43 PM XiaoLi Feng <xifeng@xxxxxxxxxx> wrote:
> > > >
> > > > From: "fengxiaoli0714@xxxxxxxx" <fengxiaoli0714@xxxxxxxxx>
> > > >
> > > > The mount option noacl aren't shown in /proc/mounts
> > > > even if they are mounted successfully. And smb2.0+
> > > > don't support ACL. Display noacl acquiescently if ACL
> > > > is unsupported.
> > > >
> > > > Signed-off-by: fengxiaoli0714@xxxxxxxx <fengxiaoli0714@xxxxxxxxx>
> > > > ---
> > > >  fs/cifs/cifsfs.c | 2 ++
> > > >  1 file changed, 2 insertions(+)
> > > >
> > > > diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
> > > > index f9b71c12cc9f..80ee4fbcd25b 100644
> > > > --- a/fs/cifs/cifsfs.c
> > > > +++ b/fs/cifs/cifsfs.c
> > > > @@ -535,6 +535,8 @@ cifs_show_options(struct seq_file *s, struct dentry
> > > > *root)
> > > >                 seq_puts(s, ",dynperm");
> > > >         if (root->d_sb->s_flags & SB_POSIXACL)
> > > >                 seq_puts(s, ",acl");
> > > > +       else
> > > > +               seq_puts(s, ",noacl");
> > > >         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
> > > >                 seq_puts(s, ",mfsymlinks");
> > > >         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
> > > > --
> > > > 2.18.1
> > > >
> > >
> > >
> > > --
> > > Thanks,
> > >
> > > Steve
> > >
> >



-- 
Thanks,

Steve



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