f2fs: fix incomplete block usage in compact SSA summaries

commit 91b76f1 upstream.

In a previous commit, a bug was introduced where compact SSA summaries
failed to utilize the entire block space in non-4KB block size
configurations, leading to inefficient space management.

This patch fixes the calculation logic to ensure that compact SSA
summaries can fully occupy the block regardless of the block size.

Reported-by: Chris Mason <clm@meta.com>
Fixes: e48e16f ("f2fs: support non-4KB block size without packed_ssa feature")
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit df337ba02ca53ca9cfcefc1ed7ca38424daa52a0)
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>

Author: Daeho Jeong

fs/f2fs/segment.c

@@ -2689,12 +2689,12 @@ int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
 			valid_sum_count += f2fs_curseg_valid_blocks(sbi, i);
 	}
 
-	sum_in_page = (sbi->sum_blocksize - 2 * sbi->sum_journal_size -
+	sum_in_page = (sbi->blocksize - 2 * sbi->sum_journal_size -
 			SUM_FOOTER_SIZE) / SUMMARY_SIZE;
 	if (valid_sum_count <= sum_in_page)
 		return 1;
 	else if ((valid_sum_count - sum_in_page) <=
-		(sbi->sum_blocksize - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
+		(sbi->blocksize - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
 		return 2;
 	return 3;
 }
@@ -4337,7 +4337,7 @@ static int read_compacted_summaries(struct f2fs_sb_info *sbi)
 			s = (struct f2fs_summary *)(kaddr + offset);
 			sum_entries(seg_i->sum_blk)[j] = *s;
 			offset += SUMMARY_SIZE;
-			if (offset + SUMMARY_SIZE <= sbi->sum_blocksize -
+			if (offset + SUMMARY_SIZE <= sbi->blocksize -
 						SUM_FOOTER_SIZE)
 				continue;
 
@@ -4510,7 +4510,7 @@ static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
 			*summary = sum_entries(seg_i->sum_blk)[j];
 			written_size += SUMMARY_SIZE;
 
-			if (written_size + SUMMARY_SIZE <= PAGE_SIZE -
+			if (written_size + SUMMARY_SIZE <= sbi->blocksize -
 							SUM_FOOTER_SIZE)
 				continue;