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  1. 03 Sep, 2013 3 commits
  3. 30 Aug, 2013 7 commits
  5. 29 Aug, 2013 1 commit
    • start.c: handle potential signal flood · 80507ee8
      Serge Hallyn authored 
      Signalfd does not guarantee that we'll get an event for every signal.
So if 3 tasks exit at the same time, we may get only one sigchld
event.  Therefore, in signal_handler(), always check whether init has
exited.  Do with with WNOWAIT so that we can still wait4 to cleanup
the init after lxc_poll() exists (rather than complicating the code).

Note - there is still a race in the kernel which can cause the
container init to become a defunct child of the host init (!).  This
doesn't solve that, but is a potential (if very unlikely) race which
apw pointed out while we were trying to create a reproducer for the
kernel bug.
Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: 's avatarStéphane Graber <stgraber@ubuntu.com>
  7. 26 Aug, 2013 3 commits
  9. 22 Aug, 2013 2 commits
  11. 21 Aug, 2013 2 commits
    • lxc_cgroup: convert to using API · 9069513c
      Serge Hallyn authored 
      Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
    • Track snapshot dependencies (v2) · dfb31b25
      Serge Hallyn authored 
      (Will push in a bit barring any objections)

lvm, btrfs, and zfs snapshots each do an ok job of handling deletions
for us - a btrfs snapshot does fine after the original is removed,
while zfs and lvm will both refuse to allow the original to be deleted
while the snapshot exists.

Overlayfs doesn't do this for us.  So, for overlayfs snapshots, track
the dependencies.

When c2 is created as an overlayfs snapshot of dir-backed c1, then

1. c2's lxc_rdepends file will contain

	c1_lxcpath
	c1_lxcname

2. c1's lxc_snapshots will contain "1"

c1 cannot be deleted so long as lxc_snapshots exists and contains
a non-zero number.

The contents of lxc_snapshots and lxc_rdepends are protected by
container_disk_lock() and at lxc_clone by the new container not yet
being accessible.

(Originally I was going to keep them in the container config, but the
problem with using $lxcpath/$name/config is that api users could end up
calling c->save_config() with a cached old value of snapshots/rdepends.)

Changelog:
	aug 21: check for fprintf and fclose failures
Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: 's avatarDwight Engen <dwight.engen@oracle.com>
  13. 20 Aug, 2013 8 commits
  15. 19 Aug, 2013 14 commits