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    Subject[PATCH 4.9 30/70] f2fs: do not set free of current section
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Yunlong Song <yunlong.song@huawei.com>

    [ Upstream commit 3611ce9911267cb93d364bd71ddea6821278d11f ]

    For the case when sbi->segs_per_sec > 1, take section:segment = 5 for
    example, if segment 1 is just used and allocate new segment 2, and the
    blocks of segment 1 is invalidated, at this time, the previous code will
    use __set_test_and_free to free the free_secmap and free_sections++,
    this is not correct since it is still a current section, so fix it.

    Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
    Reviewed-by: Chao Yu <yuchao0@huawei.com>
    Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    fs/f2fs/segment.h | 3 +++
    1 file changed, 3 insertions(+)

    --- a/fs/f2fs/segment.h
    +++ b/fs/f2fs/segment.h
    @@ -386,6 +386,8 @@ static inline void __set_test_and_free(s
    if (test_and_clear_bit(segno, free_i->free_segmap)) {
    free_i->free_segments++;

    + if (IS_CURSEC(sbi, secno))
    + goto skip_free;
    next = find_next_bit(free_i->free_segmap,
    start_segno + sbi->segs_per_sec, start_segno);
    if (next >= start_segno + sbi->segs_per_sec) {
    @@ -393,6 +395,7 @@ static inline void __set_test_and_free(s
    free_i->free_sections++;
    }
    }
    +skip_free:
    spin_unlock(&free_i->segmap_lock);
    }


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