166 static void migrate_main(struct f2fs_sb_info *sbi, unsigned int offset)  in migrate_main()  argument
176 	for (i = TOTAL_SEGS(sbi) - 1; i >= 0; i--) {  in migrate_main()
177 		se = get_seg_entry(sbi, i);  in migrate_main()
181 		for (j = sbi->blocks_per_seg - 1; j >= 0; j--) {  in migrate_main()
185 			from = START_BLOCK(sbi, i) + j;  in migrate_main()
193 			get_sum_entry(sbi, from, &sum);  in migrate_main()
196 				update_data_blkaddr(sbi, le32_to_cpu(sum.nid),  in migrate_main()
199 				update_nat_blkaddr(sbi, 0,  in migrate_main()
205 				START_BLOCK(sbi, 0),  in migrate_main()
206 				START_BLOCK(sbi, 0) + offset);  in migrate_main()
209 static void move_ssa(struct f2fs_sb_info *sbi, unsigned int segno,  in move_ssa()  argument
215 	sum_blk = get_sum_block(sbi, segno, &type);  in move_ssa()
222 				type, segno, GET_SUM_BLKADDR(sbi, segno),  in move_ssa()
233 static void migrate_ssa(struct f2fs_sb_info *sbi,  in migrate_ssa()  argument
236 	struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);  in migrate_ssa()
241 					TOTAL_SEGS(sbi) - offset;  in migrate_ssa()
251 				move_ssa(sbi, offset++, blkaddr++);  in migrate_ssa()
259 		offset = TOTAL_SEGS(sbi) - 1;  in migrate_ssa()
265 				move_ssa(sbi, offset--, blkaddr--);  in migrate_ssa()
275 static int shrink_nats(struct f2fs_sb_info *sbi,  in shrink_nats()  argument
278 	struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);  in shrink_nats()
279 	struct f2fs_nm_info *nm_i = NM_I(sbi);  in shrink_nats()
299 		seg_off = block_off >> sbi->log_blocks_per_seg;  in shrink_nats()
301 				(seg_off << sbi->log_blocks_per_seg << 1) +  in shrink_nats()
302 				(block_off & ((1 << sbi->log_blocks_per_seg) - 1)));  in shrink_nats()
305 			block_addr += sbi->blocks_per_seg;  in shrink_nats()
323 static void migrate_nat(struct f2fs_sb_info *sbi,  in migrate_nat()  argument
326 	struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);  in migrate_nat()
327 	struct f2fs_nm_info *nm_i = NM_I(sbi);  in migrate_nat()
342 		seg_off = block_off >> sbi->log_blocks_per_seg;  in migrate_nat()
344 				(seg_off << sbi->log_blocks_per_seg << 1) +  in migrate_nat()
345 				(block_off & ((1 << sbi->log_blocks_per_seg) - 1)));  in migrate_nat()
349 			block_addr += sbi->blocks_per_seg;  in migrate_nat()
357 				(seg_off << sbi->log_blocks_per_seg << 1) +  in migrate_nat()
358 				(block_off & ((1 << sbi->log_blocks_per_seg) - 1)));  in migrate_nat()
378 		seg_off = block_off >> sbi->log_blocks_per_seg;  in migrate_nat()
380 				(seg_off << sbi->log_blocks_per_seg << 1) +  in migrate_nat()
381 				(block_off & ((1 << sbi->log_blocks_per_seg) - 1)));  in migrate_nat()
390 static void migrate_sit(struct f2fs_sb_info *sbi,  in migrate_sit()  argument
393 	struct sit_info *sit_i = SIT_I(sbi);  in migrate_sit()
398 						(sbi->log_blocks_per_seg - 1);  in migrate_sit()
412 	for (segno = 0; segno < TOTAL_SEGS(sbi); segno++) {  in migrate_sit()
415 		se = get_seg_entry(sbi, segno);  in migrate_sit()
448 static void rebuild_checkpoint(struct f2fs_sb_info *sbi,  in rebuild_checkpoint()  argument
451 	struct f2fs_checkpoint *cp = F2FS_CKPT(sbi);  in rebuild_checkpoint()
454 	struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);  in rebuild_checkpoint()
478 	free_segment_count = get_free_segments(sbi);  in rebuild_checkpoint()
487 		orphan_blks = __start_sum_addr(sbi) - 1;  in rebuild_checkpoint()
496 					CURSEG_I(sbi, i)->segno - offset);  in rebuild_checkpoint()
501 					CURSEG_I(sbi, i)->segno - offset);  in rebuild_checkpoint()
529 	if (sbi->cur_cp == 2)  in rebuild_checkpoint()
556 		struct curseg_info *curseg = CURSEG_I(sbi, i);  in rebuild_checkpoint()
568 		write_nat_bits(sbi, new_sb, new_cp, sbi->cur_cp == 1 ? 2 : 1);  in rebuild_checkpoint()
580 static int f2fs_resize_grow(struct f2fs_sb_info *sbi)  in f2fs_resize_grow()  argument
582 	struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);  in f2fs_resize_grow()
591 	flush_journal_entries(sbi);  in f2fs_resize_grow()
593 	memcpy(new_sb, F2FS_RAW_SUPER(sbi), sizeof(*new_sb));  in f2fs_resize_grow()
599 		err = shrink_nats(sbi, new_sb);  in f2fs_resize_grow()
614 		err = f2fs_defragment(sbi, old_main_blkaddr, offset,  in f2fs_resize_grow()
622 		migrate_main(sbi, offset);  in f2fs_resize_grow()
624 	migrate_ssa(sbi, new_sb, offset_seg);  in f2fs_resize_grow()
625 	migrate_nat(sbi, new_sb);  in f2fs_resize_grow()
626 	migrate_sit(sbi, new_sb, offset_seg);  in f2fs_resize_grow()
627 	rebuild_checkpoint(sbi, new_sb, offset_seg);  in f2fs_resize_grow()
635 static int f2fs_resize_shrink(struct f2fs_sb_info *sbi)  in f2fs_resize_shrink()  argument
637 	struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);  in f2fs_resize_shrink()
646 	flush_journal_entries(sbi);  in f2fs_resize_shrink()
648 	memcpy(new_sb, F2FS_RAW_SUPER(sbi), sizeof(*new_sb));  in f2fs_resize_shrink()
654 		err = shrink_nats(sbi, new_sb);  in f2fs_resize_shrink()
670 	err = f2fs_defragment(sbi, tmp_end_blkaddr,  in f2fs_resize_shrink()
680 	rebuild_checkpoint(sbi, new_sb, 0);  in f2fs_resize_shrink()
696 int f2fs_resize(struct f2fs_sb_info *sbi)  in f2fs_resize()  argument
698 	struct f2fs_super_block *sb = F2FS_RAW_SUPER(sbi);  in f2fs_resize()
707 			return f2fs_resize_shrink(sbi);  in f2fs_resize()
711 		return f2fs_resize_grow(sbi);  in f2fs_resize()