ACL rules doesn't propagate on btrfs

ACL rules doesn't propagate on btrfs

[Giuseppe Fierro]

I'm playing with acl permission on btrfs (my favourite filesytem).
When I set ACL permission on directory happens that this permission doesn't
propagate inside the directory structure.

As you can see from the following example after the second level the ACL's
rules are completely forgotten.


gspe@Jura:~/Videos$ sudo mkdir test_prj
> [sudo] password for gspe:
> gspe@Jura:~/Videos$ ls -l
> total 0
> drwxr-xr-x 1 root root 0 ott 15 17:48 test_prj
> gspe@Jura:~/Videos$ sudo chown root:gmingegneria test_prj
> gspe@Jura:~/Videos$ ls -l
> total 0
> drwxr-xr-x 1 root gmingegneria 0 ott 15 17:48 test_prj
> gspe@Jura:~/Videos$ sudo chmod o-rwx test_prj
> gspe@Jura:~/Videos$ sudo chmod g+rwx test_prj
> gspe@Jura:~/Videos$ ls -l
> total 0
> drwxrwx--- 1 root gmingegneria 0 ott 15 17:48 test_prj
> gspe@Jura:~/Videos$ sudo chmod g+s test_prj
> gspe@Jura:~/Videos$ ls -l
> total 0
> drwxrws--- 1 root gmingegneria 0 ott 15 17:48 test_prj
> gspe@Jura:~/Videos$ sudo setfacl -d --set u::rwx,g::rwx,o::- test_prj
> gspe@Jura:~/Videos$ ls -l
> total 0
> drwxrws---+ 1 root gmingegneria 0 ott 15 17:48 test_prj
> gspe@Jura:~/Videos$ getfacl test_prj
> # file: test_prj
> # owner: root
> # group: gmingegneria
> # flags: -s-
> user::rwx
> group::rwx
> other::---
> default:user::rwx
> default:group::rwx
> default:other::---
> gspe@Jura:~/Videos$ cd test_prj
> gspe@Jura:~/Videos/test_prj$ touch file01
> gspe@Jura:~/Videos/test_prj$ mkdir test01
> gspe@Jura:~/Videos/test_prj$ ls -l
> total 0
> -rw-rw---- 1 gspe gmingegneria 0 ott 15 17:51 file01
> drwxrws--- 1 gspe gmingegneria 0 ott 15 17:51 test01
> gspe@Jura:~/Videos/test_prj$ getfacl file01
> # file: file01
> # owner: gspe
> # group: gmingegneria
> user::rw-
> group::rw-
> other::---
> gspe@Jura:~/Videos/test_prj$ getfacl test01
> # file: test01
> # owner: gspe
> # group: gmingegneria
> # flags: -s-
> user::rwx
> group::rwx
> other::---
> gspe@Jura:~/Videos/test_prj$ cd test01

Re: ACL rules doesn't propagate on btrfs

[Filipe David Manana]

On Tue, Oct 15, 2013 at 4:56 PM, Giuseppe Fierro <giuseppe@fierro.org> wrote:
> I'm playing with acl permission on btrfs (my favourite filesytem).
> When I set ACL permission on directory happens that this permission doesn't
> propagate inside the directory structure.
>
> As you can see from the following example after the second level the ACL's
> rules are completely forgotten.
>
>
> gspe@Jura:~/Videos$ sudo mkdir test_prj
>> [sudo] password for gspe:
>> gspe@Jura:~/Videos$ ls -l
>> total 0
>> drwxr-xr-x 1 root root 0 ott 15 17:48 test_prj
>> gspe@Jura:~/Videos$ sudo chown root:gmingegneria test_prj
>> gspe@Jura:~/Videos$ ls -l
>> total 0
>> drwxr-xr-x 1 root gmingegneria 0 ott 15 17:48 test_prj
>> gspe@Jura:~/Videos$ sudo chmod o-rwx test_prj
>> gspe@Jura:~/Videos$ sudo chmod g+rwx test_prj
>> gspe@Jura:~/Videos$ ls -l
>> total 0
>> drwxrwx--- 1 root gmingegneria 0 ott 15 17:48 test_prj
>> gspe@Jura:~/Videos$ sudo chmod g+s test_prj
>> gspe@Jura:~/Videos$ ls -l
>> total 0
>> drwxrws--- 1 root gmingegneria 0 ott 15 17:48 test_prj
>> gspe@Jura:~/Videos$ sudo setfacl -d --set u::rwx,g::rwx,o::- test_prj
>> gspe@Jura:~/Videos$ ls -l
>> total 0
>> drwxrws---+ 1 root gmingegneria 0 ott 15 17:48 test_prj
>> gspe@Jura:~/Videos$ getfacl test_prj
>> # file: test_prj
>> # owner: root
>> # group: gmingegneria
>> # flags: -s-
>> user::rwx
>> group::rwx
>> other::---
>> default:user::rwx
>> default:group::rwx
>> default:other::---
>> gspe@Jura:~/Videos$ cd test_prj
>> gspe@Jura:~/Videos/test_prj$ touch file01
>> gspe@Jura:~/Videos/test_prj$ mkdir test01
>> gspe@Jura:~/Videos/test_prj$ ls -l
>> total 0
>> -rw-rw---- 1 gspe gmingegneria 0 ott 15 17:51 file01
>> drwxrws--- 1 gspe gmingegneria 0 ott 15 17:51 test01
>> gspe@Jura:~/Videos/test_prj$ getfacl file01
>> # file: file01
>> # owner: gspe
>> # group: gmingegneria
>> user::rw-
>> group::rw-
>> other::---
>> gspe@Jura:~/Videos/test_prj$ getfacl test01
>> # file: test01
>> # owner: gspe
>> # group: gmingegneria
>> # flags: -s-
>> user::rwx
>> group::rwx
>> other::---
>> gspe@Jura:~/Videos/test_prj$ cd test01

Confirmed here with btrfs-next and found out why it happens. If you
unmount and mount again the fs, getfacl returns the expected output.
Sending a patch soon.

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-- 
Filipe David Manana,

"Reasonable men adapt themselves to the world.
 Unreasonable men adapt the world to themselves.
 That's why all progress depends on unreasonable men."