Re: Guix unmounted my /home, while -i hello

[guix]

Hello Ludovic,

I have now done following:

- entered as root, after reboot
- /dev/sda7 was mounted as /home
- instead of mounting /dev/mapper/protected on /home
- first I have unmounted /home
- and then mounted /dev/mapper/protected on /home
- and run: ./pre-inst-env guix package -i hello, with success

My personal problem is solved. But there is problem in the
daemon or guix, that it unmounted user's partition, and that
should never happen on stable system.

Jean Louis

On Wed, Mar 09, 2016 at 06:01:15PM +0100, Louis wrote:
> Hello Ludovic,
> 
> You are right, sure, it was the only option on chat, to
> quickly place it somewhere, as the /home was unmounted, so I
> have lost all operation, passwords, etc. temporarily, and
> did not replace it with better download option.
> 
> So here it is:
> 
> This is the daemon process initially, it has nothing inside:
> https://rcdrun.com/files/depository/guix/guixLOG/9992.log.gz
> 
> This is the actual daemon strace, it has 39M:
> https://rcdrun.com/files/depository/guix/guixLOG/9993.log.gz
> 
> This is dmesg, 72K:
> https://rcdrun.com/files/depository/guix/guixLOG/dmesg.log.gz
> 
> I am just guessing that problem is here below on the before
> the last line: /home: my guess is that guix somehow
> re-mounts all partitions that it finds in the system.
> 
> And my encrypted (cryptsetup, not LUKS) partition is on
> /dev/sda8 which is not specified in /etc anywhere. I am
> mounting it by hand, as root, first. I don't want for
> privacy that partition is specified in /etc or automatically
> mounted by asking me for password.
> 
> What is specified in /etc/fstab is this:
> https://rcdrun.com/files/depository/guix/guixLOG/fstab
> 
> And my /home is initially simply on /dev/sda7 I guess. It is
> mounted basically as such, because I see it in the output of
> mount:
> 
> $ mount|grep sda7
> /dev/sda7 on /home type ext4 (rw,relatime,data=ordered)
> 
> however, when I enter root, I am mounting then:
> /dev/mapper/protected -> /home on top of it, so that is also
> visible in mount command:
> 
> mount|grep mapper
> /dev/mapper/protected on /home type ext4 (rw,relatime,data=ordered)
> 
> By order it is like this:
> 
> /dev/sda7 on /home type ext4 (rw,relatime,data=ordered)
> /dev/sda5 on /tmp type ext4 (rw,relatime,data=ordered)
> binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
> tmpfs on /run/user/118 type tmpfs 
> (rw,nosuid,nodev,relatime,size=395376k,mode=700,uid=118,gid=126)
> tmpfs on /run/user/0 type tmpfs 
> (rw,nosuid,nodev,relatime,size=395376k,mode=700)
> /dev/mapper/protected on /home type ext4 (rw,relatime,data=ordered)
> 
> maybe that is the catch, it finds /home and maybe it
> re-mounts? and forgets about the other /home?
> 
> I will try again by first unmounting the /home from sda7,
> mounting it on /dev/mapper/protected and re-run it.
> 
> However, I think, this should never happen, that my actual
> /home is unmounted by guix daemon.
> 
> 
> Maybe that is the catch? It recognizes 
> [pid 10712] umount("real-root", MNT_DETACH) = 0
> [pid 10721] open("/proc/self/mountinfo", O_RDONLY) = 17
> [pid 10721] mount(NULL, "/", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/dev", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/dev/pts", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/dev/shm", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/dev/mqueue", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/dev/hugepages", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/run", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/run/lock", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/run/user/118", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/run/user/0", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/run/user/1001", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/kernel/security", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/systemd", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/cpuset", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/cpu,cpuacct", NULL, MS_PRIVATE, NULL) 
> = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/blkio", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/memory", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/devices", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/freezer", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/net_cls,net_prio", NULL, MS_PRIVATE, 
> NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/perf_event", NULL, MS_PRIVATE, NULL) 
> = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/hugetlb", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/cgroup/pids", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/pstore", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/sys/fs/fuse/connections", NULL, MS_PRIVATE, NULL) = > 0
> [pid 10721] mount(NULL, "/sys/kernel/debug", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/proc", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/proc/sys/fs/binfmt_misc", NULL, MS_PRIVATE, NULL) = > 0
> [pid 10721] mount(NULL, "/etc/machine-id", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/home", NULL, MS_PRIVATE, NULL) = 0
> [pid 10721] mount(NULL, "/tmp", NULL, MS_PRIVATE, NULL) = 0
> 
> 
> On Wed, Mar 09, 2016 at 04:41:16PM +0100, Ludovic Courtès wrote:
> > address@hidden skribis:
> > 
> > > Here is strace from daemon and dmesg:
> > 
> > Could you send them as attachments (compressed files), or, if they’re
> > too big, post them on a web site that does not require running non-free
> > JavaScript and is more likely to respect user privacy?
> > 
> > Thanks in advance!
> > Ludo’.
>