92 static int nilfs_compute_checksum(struct the_nilfs *nilfs,  in nilfs_compute_checksum()  argument
97 	unsigned int blocksize = nilfs->ns_blocksize;  in nilfs_compute_checksum()
104 	crc = crc32_le(nilfs->ns_crc_seed,  in nilfs_compute_checksum()
110 			bh = __bread(nilfs->ns_bdev, ++start, blocksize);  in nilfs_compute_checksum()
130 int nilfs_read_super_root_block(struct the_nilfs *nilfs, sector_t sr_block,  in nilfs_read_super_root_block()  argument
139 	bh_sr = __bread(nilfs->ns_bdev, sr_block, nilfs->ns_blocksize);  in nilfs_read_super_root_block()
149 		if (bytes == 0 || bytes > nilfs->ns_blocksize) {  in nilfs_read_super_root_block()
154 			    nilfs, bh_sr, &crc, sizeof(sr->sr_sum), bytes,  in nilfs_read_super_root_block()
171 	return nilfs_warn_segment_error(nilfs->ns_sb, ret);  in nilfs_read_super_root_block()
181 nilfs_read_log_header(struct the_nilfs *nilfs, sector_t start_blocknr,  in nilfs_read_log_header()  argument
186 	bh_sum = __bread(nilfs->ns_bdev, start_blocknr, nilfs->ns_blocksize);  in nilfs_read_log_header()
199 static int nilfs_validate_log(struct the_nilfs *nilfs, u64 seg_seq,  in nilfs_validate_log()  argument
217 	if (unlikely(nblock == 0 || nblock > nilfs->ns_blocks_per_segment))  in nilfs_validate_log()
222 	if (nilfs_compute_checksum(nilfs, bh_sum, &crc, sizeof(sum->ss_datasum),  in nilfs_validate_log()
223 				   ((u64)nblock << nilfs->ns_blocksize_bits),  in nilfs_validate_log()
242 static void *nilfs_read_summary_info(struct the_nilfs *nilfs,  in nilfs_read_summary_info()  argument
253 		*pbh = __bread(nilfs->ns_bdev, blocknr + 1,  in nilfs_read_summary_info()
254 			       nilfs->ns_blocksize);  in nilfs_read_summary_info()
272 static void nilfs_skip_summary_info(struct the_nilfs *nilfs,  in nilfs_skip_summary_info()  argument
292 		*pbh = __bread(nilfs->ns_bdev, blocknr + bcnt,  in nilfs_skip_summary_info()
293 			       nilfs->ns_blocksize);  in nilfs_skip_summary_info()
304 static int nilfs_scan_dsync_log(struct the_nilfs *nilfs, sector_t start_blocknr,  in nilfs_scan_dsync_log()  argument
320 	blocknr = start_blocknr + DIV_ROUND_UP(sumbytes, nilfs->ns_blocksize);  in nilfs_scan_dsync_log()
321 	bh = __bread(nilfs->ns_bdev, start_blocknr, nilfs->ns_blocksize);  in nilfs_scan_dsync_log()
330 		finfo = nilfs_read_summary_info(nilfs, &bh, &offset,  in nilfs_scan_dsync_log()
344 			binfo = nilfs_read_summary_info(nilfs, &bh, &offset,  in nilfs_scan_dsync_log()
364 		nilfs_skip_summary_info(nilfs, &bh, &offset, sizeof(__le64),  in nilfs_scan_dsync_log()
415 static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs,  in nilfs_prepare_segment_for_recovery()  argument
421 	struct inode *sufile = nilfs->ns_sufile;  in nilfs_prepare_segment_for_recovery()
426 	segnum[0] = nilfs->ns_segnum;  in nilfs_prepare_segment_for_recovery()
427 	segnum[1] = nilfs->ns_nextnum;  in nilfs_prepare_segment_for_recovery()
464 	nilfs->ns_pseg_offset = 0;  in nilfs_prepare_segment_for_recovery()
465 	nilfs->ns_seg_seq = ri->ri_seq + 2;  in nilfs_prepare_segment_for_recovery()
466 	nilfs->ns_nextnum = nilfs->ns_segnum = segnum[0];  in nilfs_prepare_segment_for_recovery()
473 static int nilfs_recovery_copy_block(struct the_nilfs *nilfs,  in nilfs_recovery_copy_block()  argument
480 	bh_org = __bread(nilfs->ns_bdev, rb->blocknr, nilfs->ns_blocksize);  in nilfs_recovery_copy_block()
491 static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs,  in nilfs_recover_dsync_blocks()  argument
499 	unsigned int blocksize = nilfs->ns_blocksize;  in nilfs_recover_dsync_blocks()
524 		err = nilfs_recovery_copy_block(nilfs, rb, page);  in nilfs_recover_dsync_blocks()
567 static int nilfs_do_roll_forward(struct the_nilfs *nilfs,  in nilfs_do_roll_forward()  argument
591 	segnum = nilfs_get_segnum_of_block(nilfs, pseg_start);  in nilfs_do_roll_forward()
592 	nilfs_get_segment_range(nilfs, segnum, &seg_start, &seg_end);  in nilfs_do_roll_forward()
596 		bh_sum = nilfs_read_log_header(nilfs, pseg_start, &sum);  in nilfs_do_roll_forward()
602 		ret = nilfs_validate_log(nilfs, seg_seq, bh_sum, sum);  in nilfs_do_roll_forward()
616 		nextnum = nilfs_get_segnum_of_block(nilfs,  in nilfs_do_roll_forward()
619 		nilfs->ns_ctime = le64_to_cpu(sum->ss_create);  in nilfs_do_roll_forward()
621 			nilfs->ns_nongc_ctime = nilfs->ns_ctime;  in nilfs_do_roll_forward()
634 			err = nilfs_scan_dsync_log(nilfs, pseg_start, sum,  in nilfs_do_roll_forward()
640 					nilfs, sb, root, &dsync_blocks,  in nilfs_do_roll_forward()
667 		nilfs_get_segment_range(nilfs, segnum, &seg_start, &seg_end);  in nilfs_do_roll_forward()
690 static void nilfs_finish_roll_forward(struct the_nilfs *nilfs,  in nilfs_finish_roll_forward()  argument
696 	if (nilfs_get_segnum_of_block(nilfs, ri->ri_lsegs_start) !=  in nilfs_finish_roll_forward()
697 	    nilfs_get_segnum_of_block(nilfs, ri->ri_super_root))  in nilfs_finish_roll_forward()
700 	bh = __getblk(nilfs->ns_bdev, ri->ri_lsegs_start, nilfs->ns_blocksize);  in nilfs_finish_roll_forward()
706 		nilfs_msg(nilfs->ns_sb, KERN_WARNING,  in nilfs_finish_roll_forward()
730 int nilfs_salvage_orphan_logs(struct the_nilfs *nilfs,  in nilfs_salvage_orphan_logs()  argument
747 	err = nilfs_do_roll_forward(nilfs, sb, root, ri);  in nilfs_salvage_orphan_logs()
752 		err = nilfs_prepare_segment_for_recovery(nilfs, sb, ri);  in nilfs_salvage_orphan_logs()
764 		set_nilfs_discontinued(nilfs);  in nilfs_salvage_orphan_logs()
775 		nilfs_finish_roll_forward(nilfs, ri);  in nilfs_salvage_orphan_logs()
801 int nilfs_search_super_root(struct the_nilfs *nilfs,  in nilfs_search_super_root()  argument
818 	pseg_start = nilfs->ns_last_pseg;  in nilfs_search_super_root()
819 	seg_seq = nilfs->ns_last_seq;  in nilfs_search_super_root()
820 	cno = nilfs->ns_last_cno;  in nilfs_search_super_root()
821 	segnum = nilfs_get_segnum_of_block(nilfs, pseg_start);  in nilfs_search_super_root()
824 	nilfs_get_segment_range(nilfs, segnum, &seg_start, &seg_end);  in nilfs_search_super_root()
829 		__breadahead(nilfs->ns_bdev, b++, nilfs->ns_blocksize);  in nilfs_search_super_root()
834 		bh_sum = nilfs_read_log_header(nilfs, pseg_start, &sum);  in nilfs_search_super_root()
838 		ret = nilfs_validate_log(nilfs, seg_seq, bh_sum, sum);  in nilfs_search_super_root()
856 		nextnum = nilfs_get_segnum_of_block(nilfs,  in nilfs_search_super_root()
873 			nilfs_get_segment_range(nilfs, nextnum, &b, &end);  in nilfs_search_super_root()
875 				__breadahead(nilfs->ns_bdev, b++,  in nilfs_search_super_root()
876 					     nilfs->ns_blocksize);  in nilfs_search_super_root()
895 		nilfs->ns_pseg_offset = pseg_start + nblocks - seg_start;  in nilfs_search_super_root()
896 		nilfs->ns_seg_seq = seg_seq;  in nilfs_search_super_root()
897 		nilfs->ns_segnum = segnum;  in nilfs_search_super_root()
898 		nilfs->ns_cno = cno;  /* nilfs->ns_cno = ri->ri_cno + 1 */  in nilfs_search_super_root()
899 		nilfs->ns_ctime = le64_to_cpu(sum->ss_create);  in nilfs_search_super_root()
900 		nilfs->ns_nextnum = nextnum;  in nilfs_search_super_root()
905 			if (nilfs->ns_mount_state & NILFS_VALID_FS)  in nilfs_search_super_root()
937 		nilfs_get_segment_range(nilfs, segnum, &seg_start, &seg_end);  in nilfs_search_super_root()
945 	nilfs->ns_last_pseg = sr_pseg_start;  in nilfs_search_super_root()
946 	nilfs->ns_last_seq = nilfs->ns_seg_seq;  in nilfs_search_super_root()
947 	nilfs->ns_last_cno = ri->ri_cno;  in nilfs_search_super_root()
953 	return ret < 0 ? ret : nilfs_warn_segment_error(nilfs->ns_sb, ret);  in nilfs_search_super_root()