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authorAl Viro <viro@zeniv.linux.org.uk>2016-11-21 03:33:09 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2016-12-17 00:30:49 +0300
commit5235d448c48e1f5a4a34bf90d412775cb75ffb32 (patch)
treef4bbb063b81ba920fffe16fd12bfc0d01db05673 /fs/namespace.c
parent066715d3fde4834cbbec88d12ca277c4185b9303 (diff)
downloadlinux-5235d448c48e1f5a4a34bf90d412775cb75ffb32.tar.xz
reorganize do_make_slave()
Make sure that clone_mnt() never returns a mount with MNT_SHARED in flags, but without a valid ->mnt_group_id. That allows to demystify do_make_slave() quite a bit, among other things. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namespace.c')
-rw-r--r--fs/namespace.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index ec726ae00579..141d5776c70e 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1030,6 +1030,8 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
if (IS_MNT_SLAVE(old))
list_add(&mnt->mnt_slave, &old->mnt_slave);
mnt->mnt_master = old->mnt_master;
+ } else {
+ CLEAR_MNT_SHARED(mnt);
}
if (flag & CL_MAKE_SHARED)
set_mnt_shared(mnt);