42 static int do_one_pass(journal_t *journal,
70 static int do_readahead(journal_t *journal, unsigned int start)  in do_readahead()  argument
80 	max = start + (128 * 1024 / journal->j_blocksize);  in do_readahead()
81 	if (max > journal->j_maxlen)  in do_readahead()
82 		max = journal->j_maxlen;  in do_readahead()
90 		err = journal_bmap(journal, next, &blocknr);  in do_readahead()
98 		bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);  in do_readahead()
153 static int jread(struct buffer_head **bhp, journal_t *journal,  in jread()  argument
162 	if (offset >= journal->j_maxlen) {  in jread()
167 	err = journal_bmap(journal, offset, &blocknr);  in jread()
175 	bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);  in jread()
183 			do_readahead(journal, offset);  in jread()
222 static int count_tags(journal_t *journal, struct buffer_head *bh)  in count_tags()  argument
226 	int			nr = 0, size = journal->j_blocksize;  in count_tags()
227 	int			tag_bytes = journal_tag_bytes(journal);  in count_tags()
229 	if (journal_has_csum_v2or3(journal))  in count_tags()
251 #define wrap(journal, var)						\  argument
253 	if (var >= (journal)->j_last)					\
254 		var -= ((journal)->j_last - (journal)->j_first);	\
269 int journal_recover(journal_t *journal)  in journal_recover()  argument
277 	sb = journal->j_superblock;  in journal_recover()
288 		journal->j_transaction_sequence = ext2fs_be32_to_cpu(sb->s_sequence) + 1;  in journal_recover()
292 	err = do_one_pass(journal, &info, PASS_SCAN);  in journal_recover()
294 		err = do_one_pass(journal, &info, PASS_REVOKE);  in journal_recover()
296 		err = do_one_pass(journal, &info, PASS_REPLAY);  in journal_recover()
306 	journal->j_transaction_sequence = ++info.end_transaction;  in journal_recover()
308 	journal_clear_revoke(journal);  in journal_recover()
309 	err2 = sync_blockdev(journal->j_fs_dev);  in journal_recover()
313 	if (journal->j_flags & JFS_BARRIER) {  in journal_recover()
314 		err2 = blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);  in journal_recover()
334 int journal_skip_recovery(journal_t *journal)  in journal_skip_recovery()  argument
342 	err = do_one_pass(journal, &info, PASS_SCAN);  in journal_skip_recovery()
346 		++journal->j_transaction_sequence;  in journal_skip_recovery()
350 			ext2fs_be32_to_cpu(journal->j_superblock->s_sequence);  in journal_skip_recovery()
355 		journal->j_transaction_sequence = ++info.end_transaction;  in journal_skip_recovery()
358 	journal->j_tail = 0;  in journal_skip_recovery()
362 static inline unsigned long long read_tag_block(journal_t *journal,  in read_tag_block()  argument
366 	if (jfs_has_feature_64bit(journal))  in read_tag_block()
375 static int calc_chksums(journal_t *journal, struct buffer_head *bh,  in calc_chksums()  argument
382 	num_blks = count_tags(journal, bh);  in calc_chksums()
388 		wrap(journal, *next_log_block);  in calc_chksums()
389 		err = jread(&obh, journal, io_block);  in calc_chksums()
441 static int do_one_pass(journal_t *journal,  in do_one_pass()  argument
452 	int			tag_bytes = journal_tag_bytes(journal);  in do_one_pass()
463 	sb = journal->j_superblock;  in do_one_pass()
498 			  next_commit_ID, next_log_block, journal->j_last);  in do_one_pass()
505 		err = jread(&bh, journal, next_log_block);  in do_one_pass()
510 		wrap(journal, next_log_block);  in do_one_pass()
542 			if (journal_has_csum_v2or3(journal))  in do_one_pass()
546 			    !jbd2_descr_block_csum_verify(journal,  in do_one_pass()
559 				    jfs_has_feature_checksum(journal) &&  in do_one_pass()
561 					if (calc_chksums(journal, bh,  in do_one_pass()
570 				next_log_block += count_tags(journal, bh);  in do_one_pass()
571 				wrap(journal, next_log_block);  in do_one_pass()
582 			       <= journal->j_blocksize - descr_csum_size) {  in do_one_pass()
589 				wrap(journal, next_log_block);  in do_one_pass()
590 				err = jread(&obh, journal, io_block);  in do_one_pass()
603 					blocknr = read_tag_block(journal,  in do_one_pass()
610 					    (journal, blocknr,  in do_one_pass()
619 						journal, tag, obh->b_data,  in do_one_pass()
633 					nbh = __getblk(journal->j_fs_dev,  in do_one_pass()
635 							journal->j_blocksize);  in do_one_pass()
648 							journal->j_blocksize);  in do_one_pass()
715 			    jfs_has_feature_checksum(journal)) {  in do_one_pass()
725 					journal->j_failed_commit =  in do_one_pass()
755 					if (!jfs_has_feature_async_commit(journal)){  in do_one_pass()
756 						journal->j_failed_commit =  in do_one_pass()
765 			    !jbd2_commit_block_csum_verify(journal,  in do_one_pass()
769 				if (!jfs_has_feature_async_commit(journal)) {  in do_one_pass()
770 					journal->j_failed_commit =  in do_one_pass()
788 			err = scan_revoke_records(journal, bh,  in do_one_pass()
855 static int scan_revoke_records(journal_t *journal, struct buffer_head *bh,  in scan_revoke_records()  argument
868 	if (!jbd2_revoke_block_csum_verify(journal, header))  in scan_revoke_records()
871 	if (journal_has_csum_v2or3(journal))  in scan_revoke_records()
873 	if (rcount > journal->j_blocksize - csum_size)  in scan_revoke_records()
877 	if (jfs_has_feature_64bit(journal))  in scan_revoke_records()
889 		err = journal_set_revoke(journal, blocknr, sequence);  in scan_revoke_records()