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Date: Wed, 30 Mar 2016 12:09:31 -0600 From: Tycho Andersen <tycho.andersen@...onical.com> To: "Serge E. Hallyn" <serge@...lyn.com> Cc: tj@...nel.org, linux-api@...r.kernel.org, adityakali@...gle.com, Linux Containers <containers@...ts.osdl.org>, "Eric W. Biederman" <ebiederm@...ssion.com>, cgroups@...r.kernel.org, lkml <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] cgroup mount: ignore nsroot= On Wed, Mar 30, 2016 at 12:21:00PM -0500, Serge E. Hallyn wrote: > As of the patch "cgroup namespaces: add a 'nsroot=' mountinfo field", > cgroupfs mountinfo output shows 'nsroot='. If userspace like criu > copy/pastes mount options from there into a new mount command, we should > ignore it. > > Signed-off-by: Serge Hallyn <serge.hallyn@...ntu.com> Tested-by: Tycho Andersen <tycho.andersen@...onical.com> Thanks, Serge. > --- > kernel/cgroup.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/kernel/cgroup.c b/kernel/cgroup.c > index ef0c25d..69fb112 100644 > --- a/kernel/cgroup.c > +++ b/kernel/cgroup.c > @@ -1680,6 +1680,10 @@ static int parse_cgroupfs_options(char *data, struct cgroup_sb_opts *opts) > opts->none = true; > continue; > } > + if (!strncmp(token, "nsroot=", 7)) { > + /* ignore nsroot= copied from mountinfo */ > + continue; > + } > if (!strcmp(token, "all")) { > /* Mutually exclusive option 'all' + subsystem name */ > if (one_ss) > -- > 2.7.0 >
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