f2fs: validate before set/clear free nat bitmap

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In flush_nat_entries, all dirty nats will be flushed and if
their new address isn't NULL_ADDR, their bitmaps will be updated,
the free_nid_count of the bitmaps will be increaced regardless
of whether the nats have already been occupied before.
This could lead to wrong free_nid_count.
So this patch checks the status of the bits beforeactually
set/clear them.

Fixes: 586d1492f3 ("f2fs: skip scanning free nid bitmap of full NAT blocks")
Signed-off-by: Fan li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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LiFan 2017-11-10 15:41:42 +08:00 • committed by Jaegeuk Kim

parent 19526d74cf

commit 0dd99ca76f

1 changed files with 10 additions and 7 deletions

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fs/f2fs/node.c

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