• C
    f2fs: fix to detect looped node chain correctly · 82902c06
    Chao Yu 提交于
    Below dmesg was printed when testing generic/388 of fstest:
    
    F2FS-fs (zram1): find_fsync_dnodes: detect looped node chain, blkaddr:526615, next:526616
    F2FS-fs (zram1): Cannot recover all fsync data errno=-22
    F2FS-fs (zram1): Mounted with checkpoint version = 22300d0e
    F2FS-fs (zram1): find_fsync_dnodes: detect looped node chain, blkaddr:526615, next:526616
    F2FS-fs (zram1): Cannot recover all fsync data errno=-22
    
    The reason is that we initialize free_blocks with free blocks of
    filesystem, so if filesystem is full, free_blocks can be zero,
    below condition will be true, so that, it will fail recovery.
    
    if (++loop_cnt >= free_blocks ||
    	blkaddr == next_blkaddr_of_node(page))
    
    To fix this issue, initialize free_blocks with correct value which
    includes over-privision blocks.
    Signed-off-by: NChao Yu <yuchao0@huawei.com>
    Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
    82902c06
recovery.c 16.6 KB