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f2fs: fix to caclulate required free section correctly

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When calculating required free section during file defragmenting, we
should skip holes in file, otherwise we will probably fail to defrag
sparse file with large size.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2018-01-10 18:18:51 +08:00 • committed by Jaegeuk Kim
commit 4992a3ca15
1 changed files with 10 additions and 7 deletions
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17
fs/f2fs/file.c
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@ -2097,10 +2097,12 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
continue;
}
if (blk_end && blk_end != map.m_pblk) {
if (blk_end && blk_end != map.m_pblk)
fragmented = true;
break;
}
/* record total count of block that we're going to move */
total += map.m_len;
blk_end = map.m_pblk + map.m_len;
map.m_lblk += map.m_len;
@ -2109,10 +2111,7 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
if (!fragmented)
goto out;
map.m_lblk = pg_start;
map.m_len = pg_end - pg_start;
sec_num = (map.m_len + BLKS_PER_SEC(sbi) - 1) / BLKS_PER_SEC(sbi);
sec_num = (total + BLKS_PER_SEC(sbi) - 1) / BLKS_PER_SEC(sbi);
/*
* make sure there are enough free section for LFS allocation, this can
@ -2124,6 +2123,10 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
goto out;
}
map.m_lblk = pg_start;
map.m_len = pg_end - pg_start;
total = 0;
while (map.m_lblk < pg_end) {
pgoff_t idx;
int cnt = 0;