• Andrew Vagin's avatar
    mount: don't do MS_REC|MS_PRIVATE for host mounts · 84bf1ad4
    Andrew Vagin authored
    Here is a race when someone umounted something and this operation
    isn't propagated into our namespace.
    
    CRIU					| Another process
    -----------------------------------------------------------------
    pivot_root(".", put_root)		|
    mount(put_root, MS_REC|MS_PRIVATE)	|
    					| umount /xxx/yyy
    					| umount /xxx -> EBUSY
    umount(put_root)
    
    We do this to not affect mounts in put_root, but we can mask
    these mounts as slave and this will work for us and for external
    users.
    Signed-off-by: 's avatarAndrew Vagin <avagin@virtuozzo.com>
    Signed-off-by: 's avatarPavel Emelyanov <xemul@virtuozzo.com>
    84bf1ad4
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