• Eric W. Biederman's avatar
    proc: Use d_invalidate in proc_prune_siblings_dcache · f90f3caf
    Eric W. Biederman authored
    The function d_prune_aliases has the problem that it will only prune
    aliases thare are completely unused.  It will not remove aliases for
    the dcache or even think of removing mounts from the dcache.  For that
    behavior d_invalidate is needed.
    
    To use d_invalidate replace d_prune_aliases with d_find_alias followed
    by d_invalidate and dput.
    
    For completeness the directory and the non-directory cases are
    separated because in theory (although not in currently in practice for
    proc) directories can only ever have a single dentry while
    non-directories can have hardlinks and thus multiple dentries.
    As part of this separation use d_find_any_alias for directories
    to spare d_find_alias the extra work of doing that.
    
    Plus the differences between d_find_any_alias and d_find_alias makes
    it clear why the directory and non-directory code and not share code.
    
    To make it clear these routines now invalidate dentries rename
    proc_prune_siblings_dache to proc_invalidate_siblings_dcache, and rename
    proc_sys_prune_dcache proc_sys_invalidate_dcache.
    
    V2: Split the directory and non-directory cases.  To make this
        code robust to future changes in proc.
    Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
    f90f3caf
internal.h 8.63 KB