[RFC PATCH v3 4/5] UBIFS: ACL: introduce ACL mount options

[Dongsheng Yang]

On 09/11/2015 04:25 PM, Sheng Yong wrote:
>
>
> On 9/11/2015 1:03 PM, Dongsheng Yang wrote:
>> On 09/11/2015 05:09 PM, Sheng Yong wrote:
>>> This patch introduces `acl' and `noacl' mount options for ACL.
>>>
>>> Signed-off-by: Sheng Yong <shengyong1 at huawei.com>
>>> ---
>>>    fs/ubifs/super.c | 15 +++++++++++++++
>>>    1 file changed, 15 insertions(+)
>>>
>>> diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
>>> index 9547a278..52baad1 100644
>>> --- a/fs/ubifs/super.c
>>> +++ b/fs/ubifs/super.c
>>> @@ -441,6 +441,9 @@ static int ubifs_show_options(struct seq_file *s, struct dentry *root)
>>>                   ubifs_compr_name(c->mount_opts.compr_type));
>>>        }
>>>
>>> +    if (c->vfs_sb->s_flags & MS_POSIXACL)
>>> +        seq_printf(s, ",acl");
>>> +
>>>        return 0;
>>>    }
>>>
>>> @@ -926,6 +929,8 @@ enum {
>>>        Opt_chk_data_crc,
>>>        Opt_no_chk_data_crc,
>>>        Opt_override_compr,
>>> +    Opt_acl,
>>> +    Opt_noacl,
>>>        Opt_err,
>>>    };
>>>
>>> @@ -937,6 +942,8 @@ static const match_table_t tokens = {
>>>        {Opt_chk_data_crc, "chk_data_crc"},
>>>        {Opt_no_chk_data_crc, "no_chk_data_crc"},
>>>        {Opt_override_compr, "compr=%s"},
>>> +    {Opt_acl, "acl"},
>>> +    {Opt_noacl, "noacl"},
>>>        {Opt_err, NULL},
>>>    };
>>>
>>> @@ -1037,6 +1044,14 @@ static int ubifs_parse_options(struct ubifs_info *c, char *options,
>>>                c->default_compr = c->mount_opts.compr_type;
>>>                break;
>>>            }
>>> +#ifdef CONFIG_UBIFS_FS_POSIX_ACL
>>> +        case Opt_acl:
>>> +            c->vfs_sb->s_flags |= MS_POSIXACL;
>>> +            break;
>>
>> I think we can error out if CONFIG_UBIFS_FS_POSIX_ACL=n && Opt_acl is specified. I think you missed my comment again, I mentioned it in your V2 patch.
>
> I don't think the else is needed. I think the `default' could handle this.

Oh, yes, good. My bad. default would handle it.

Thanx
Yang
>
> thanks,
> Sheng
>>
>> Yang
>>> +        case Opt_noacl:
>>> +            c->vfs_sb->s_flags &= ~MS_POSIXACL;
>>> +            break;
>>> +#endif
>>>            default:
>>>            {
>>>                unsigned long flag;
>>>
>>
>>
>> .
>>
>
> .
>