jesnow
l33t
Joined: 26 Apr 2006
Posts: 892
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 Posted: Sun Jan 03, 2021 5:28 pm Post subject: ccache and samba permissions |
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Hi everyone:
I have been trying to set up shared ccache between two machines using samba. ccache works just fine locally on the client, but when I mount the ccache directory on the server using samba and point ccache at it I get:
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bartali /home/jesnow # emerge iperf
Calculating dependencies... done!
>>> Verifying ebuild manifests
>>> Emerging (1 of 1) net-misc/iperf-3.9-r1::gentoo
* Adjusting permissions for FEATURES=userpriv: '/var/cache/ccache'
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And the emerge hangs, obviously not what we want.
Obviously this is a samba permissions problem and a ccache problem. I can switch the ccache back to local any time, this all works. The authentication with samba works fine, with one catch:
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bartali /home/jesnow # dir /var/cache
total 168
drwxr-xr-x 14 root root 4096 Jan 3 11:13 .
drwxr-xr-x 10 root root 4096 Jun 10 2020 ..
drwxr-xr-x 2 root root 4096 May 31 2020 binpkgs
drwxr-xr-x 2 root portage 0 Jan 3 11:06 ccache
drwxrwsr-x 19 root portage 4096 Jan 1 11:07 ccache-local
drwxrwx--- 3 root lp 4096 Dec 28 15:13 cups
drwxrwxr-x 3 root portage 110592 Jan 3 10:01 distfiles
drwxr-xr-x 4 root portage 4096 Jan 3 11:09 edb
drwxrwxr-x 2 portage portage 4096 May 31 2020 eix
drwxr-xr-x 2 root root 12288 Oct 31 18:51 fontconfig
-rw-r--r-- 1 root root 0 Mar 11 2020 .keep
drwx------ 2 root root 4096 Jan 3 11:04 ldconfig
drwxr-xr-x 2 man man 4096 Mar 11 2020 man
drwx------ 2 root root 4096 May 31 2020 revdep-rebuild
drwxr-xr-x 3 root root 4096 Jan 3 11:10 samba
bartali /home/jesnow #
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When I mount the CCACHE_DIR, samba refuses to mount it group writeable, or setgid. I think these things are required for ccache, and so ccache helpfully sets about fixing them, which it can't. I can do everything else, I have full write access to the remote mounted /var/cache/ccache, I can create and save files there no problem.
the mount command looks like this:
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bartali /home/jesnow # mount -v //merckx/ccache /var/cache/ccache -t cifs -o credentials=/root/smb-merckx/.rcredential,uid=root,gid=portage
mount.cifs kernel mount options: ip=192.168.1.105,unc=\\merckx\ccache,uid=0,gid=250,user=root,pass=********
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and smb.conf section on the server looks like this:
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#
[ccache]
path=/var/cache/ccache
public=Yes
writable = Yes
printable = No
create mask = 0777
directory mask = 0777
force user = root
force group = portage
allow hosts = 192.168.1.
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But samba on the client steadfastly refuses to grant group writeable and setgid.
Any insight would be greatly appreciated.
Cheers,
Jon. |
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Networking & Security
