Arch Linux

crito

Member

Registered: 2012-07-21

Posts: 2

Permission denied when logging in on fresh btrfs install

I made a fresh arch install, using grub2-efi, btrfs and luks encryption. I followed the wiki for the most part and can boot my installation succesfully. I added an user account, following the Beginners Guide but get a permission denied error when trying to login as this user. I think its a similar issues as here but there is no resolution mentioned in the thread.

[root@bombadil ~]# su - crito
su: warning: cannot change directory to /home/crito: Permission denied
su: /bin/bash: Permission denied

I posted an strace of the command here but can't see anything that strucks me as the source of the problem. I also can't login using the console. Only logins as root succeed. In auth.log I can only see this:

Jul 22 16:57:17 localhost login: pam_unix(login:session): session opened for user crito by LOGIN(uid=0)
Jul 22 16:57:17 localhost login: LOGIN ON tty2 BY crito
Jul 22 16:57:17 localhost login: pam_unix(login:session): session closed for user crito

I checked the permissions, and it seems good to me:

[root@bombadil ~]# ls -laR /home
/home/:
total 0
drwxr-xr-x 1 root  root   10 Jul 21 14:48 .
drwx------ 1 root  root  132 Jul 21 14:28 ..
drwx------ 1 crito users  64 Jul 21 14:48 crito

/home/crito:
total 12
drwx------ 1 crito users  64 Jul 21 14:48 .
drwxr-xr-x 1 root  root   10 Jul 21 14:48 ..
-rw-r--r-- 1 crito users  21 Jul 10 23:34 .bash_logout
-rw-r--r-- 1 crito users  57 Jul 10 23:34 .bash_profile
-rw-r--r-- 1 crito users 141 Jul 10 23:34 .bashrc

I use btrfs subvolumes:

[root@bombadil ~]# btrfs subvol list -p /
ID 256 parent 5 top level 5 path __active
ID 258 parent 256 top level 5 path __active/home
ID 259 parent 256 top level 5 path __active/usr
ID 260 parent 256 top level 5 path __active/var

And I mount root using this entry in /etc/fstab:

/dev/mapper/root / btrfs defaults,noatime,subvol=__active 0 0

I haven't touched inittab or anything. Its a very basic and fresh arch install. Those are the relevant steps I did in creating the installation:

mkfs.btrfs -L btrfs-root /dev/mapper/root
mount -o defaults,noatime /dev/mapper/root /broot/
btrfs subvolume create /broot/__active
btrfs subvolume create /broot/__active/home
btrfs subvolume create /broot/__active/usr
btrfs subvolume create /broot/__active/var
mount -o defaults,noatime,subvol=__active /dev/mapper/root /mnt
chmod 0755 /mnt/home
chmod 0755 /mnt/usr
chmod 0755 /mnt/var
pacman -r /mnt -Sy base base-devel btrfs-progs grub2-bios wireless_tools vim-runtime --ignore grub

Any pointer into the right direction would be appreciated.

falconindy

Developer

From: New York, USA

Registered: 2009-10-22

Posts: 4,111

Website

Re: Permission denied when logging in on fresh btrfs install

You need to mount the real root and chmod the directory for the subvolume.

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blog | ±github

derhamster

Member

Registered: 2012-07-08

Posts: 86

Re: Permission denied when logging in on fresh btrfs install

You need to mount the real root and chmod the directory for the subvolume.

The wiki says the same iirc. I have a very similar setup and didn't need to chmod anything. Subvolumes were created with 0755 rights by default for me.

crito

Member

Registered: 2012-07-21

Posts: 2

Re: Permission denied when logging in on fresh btrfs install

Thanx a lot. Running a chmod 0755 /__active did the trick.