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resize.f2fs: fill zeros for expanded ssa area

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This will avoid wrong behavior after expanding volume.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2016-11-02 22:23:24 -07:00
parent 2d7d4ffdd4
commit 7401b7ce2d
1 changed files with 22 additions and 9 deletions
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31
fsck/resize.c
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@ -206,24 +206,37 @@ static void migrate_ssa(struct f2fs_sb_info *sbi,
struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);
block_t old_sum_blkaddr = get_sb(ssa_blkaddr);
block_t new_sum_blkaddr = get_newsb(ssa_blkaddr);
unsigned int segno;
block_t end_sum_blkaddr = get_newsb(main_blkaddr);
block_t blkaddr;
void *zero_block = calloc(BLOCK_SZ, 1);
ASSERT(zero_block);
if (offset && new_sum_blkaddr < old_sum_blkaddr + offset) {
segno = offset;
while (segno != TOTAL_SEGS(sbi)) {
move_ssa(sbi, segno, new_sum_blkaddr + segno - offset);
segno++;
blkaddr = new_sum_blkaddr;
while (blkaddr < end_sum_blkaddr) {
if (blkaddr - new_sum_blkaddr < TOTAL_SEGS(sbi))
move_ssa(sbi, offset, blkaddr);
else
dev_write_block(zero_block, blkaddr);
offset++;
blkaddr++;
}
} else {
segno = TOTAL_SEGS(sbi) - 1;
while (segno != offset - 1) {
move_ssa(sbi, segno, new_sum_blkaddr + segno - offset);
segno--;
blkaddr = end_sum_blkaddr - 1;
offset = TOTAL_SEGS(sbi) - 1;
while (blkaddr >= new_sum_blkaddr) {
if (blkaddr >= TOTAL_SEGS(sbi) + new_sum_blkaddr)
dev_write_block(zero_block, blkaddr);
else
move_ssa(sbi, offset--, blkaddr);
blkaddr--;
}
}
DBG(0, "Info: Done to migrate SSA blocks: sum_blkaddr = 0x%x -> 0x%x\n",
old_sum_blkaddr, new_sum_blkaddr);
free(zero_block);
}
static int shrink_nats(struct f2fs_sb_info *sbi,