| touch_mnt_namespace when the mount flags change |
| |
| From: Dan Williams <dan.j.williams@intel.com> |
| |
| Daemons that need to be launched while the rootfs is read-only can now |
| poll /proc/mounts to be notified when their O_RDWR requests may no |
| longer end in EROFS. |
| |
| Cc: Kay Sievers <kay.sievers@vrfy.org> |
| Cc: Neil Brown <neilb@suse.de> |
| Signed-off-by: Dan Williams <dan.j.williams@intel.com> |
| --- |
| |
| fs/namespace.c | 7 ++++++- |
| 1 files changed, 6 insertions(+), 1 deletions(-) |
| |
| |
| diff --git a/fs/namespace.c b/fs/namespace.c |
| index 6e283c9..1bd5ba2 100644 |
| --- a/fs/namespace.c |
| +++ b/fs/namespace.c |
| @@ -1553,8 +1553,13 @@ static noinline int do_remount(struct nameidata *nd, int flags, int mnt_flags, |
| if (!err) |
| nd->path.mnt->mnt_flags = mnt_flags; |
| up_write(&sb->s_umount); |
| - if (!err) |
| + if (!err) { |
| security_sb_post_remount(nd->path.mnt, flags, data); |
| + |
| + spin_lock(&vfsmount_lock); |
| + touch_mnt_namespace(nd->path.mnt->mnt_ns); |
| + spin_unlock(&vfsmount_lock); |
| + } |
| return err; |
| } |
| |
