From: Konstantin Khorenko <khore...@virtuozzo.com> We mount secondary ploop on host for resize functionality so allow mount in init userns if fs already mounted in non-init userns.
https://jira.sw.ru/browse/PSBM-68599 Signed-off-by: Konstantin Khorenko <khore...@virtuozzo.com> This hack is also needed for "vzctl snapshot-mount ..." functionality for running Containers. https://jira.sw.ru/browse/PSBM-128132 (cherry picked from vz7 commit f8a3e221f5d2 ("ve/fs: allow mount fs in init userns if it's mounted in another userns")) Signed-off-by: Konstantin Khorenko <khore...@virtuozzo.com> (cherry picked from vz8 commit a6d67427a9c921b685dc20cd64025770b950203c) Signed-off-by: Andrey Zhadchenko <andrey.zhadche...@virtuozzo.com> --- fs/super.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/super.c b/fs/super.c index 5ea020b..d3f48cf 100644 --- a/fs/super.c +++ b/fs/super.c @@ -582,7 +582,12 @@ struct super_block *sget_fc(struct fs_context *fc, return s; share_extant_sb: - if (user_ns != old->s_user_ns) { + /* PSBM-86208: we mount secondary ploop on host for + * resize functionality so allow mount in init userns + * if fs already mounted in non-init userns + */ + if (user_ns != old->s_user_ns && + user_ns != &init_user_ns) { spin_unlock(&sb_lock); destroy_unused_super(s); return ERR_PTR(-EBUSY); -- 1.8.3.1 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
