• Jaegeuk Kim's avatar
    f2fs: cover free_nid management with spin_lock · 59bbd474
    Jaegeuk Kim authored
    After build_free_nids() searches free nid candidates from nat pages and
    current journal blocks, it checks all the candidates if they are allocated
    so that the nat cache has its nid with an allocated block address.
    
    In this procedure, previously we used
        list_for_each_entry_safe(fnid, next_fnid, &nm_i->free_nid_list, list).
    But, this is not covered by free_nid_list_lock, resulting in null pointer bug.
    
    This patch moves this checking routine inside add_free_nid() in order not to use
    the spin_lock.
    Signed-off-by: default avatarJaegeuk Kim <jaegeuk.kim@samsung.com>
    59bbd474
node.c 42.1 KB