btrfs-progs: check: add more progress or error messages

Some steps don't seem to have a message printed when they start, like
the tree-log clearing or checksum fill phase.

Signed-off-by: David Sterba <dsterba@suse.com>

Author: kdave

check/main.c

@@ -10373,6 +10373,7 @@ static int cmd_check(const struct cmd_struct *cmd, int argc, char **argv)
 			err |= !!ret;
 			goto close_out;
 		}
+		pr_verbose(LOG_DEFAULT, "Clearing tree-log\n");
 		ret = zero_log_tree(root);
 		err |= !!ret;
 		if (ret) {
@@ -10382,8 +10383,7 @@ static int cmd_check(const struct cmd_struct *cmd, int argc, char **argv)
 	}
 
 	if (qgroup_report) {
-		printf("Print quota groups for %s\nUUID: %s\n", argv[optind],
-		       uuidbuf);
+		printf("Print quota groups report for %s\nUUID: %s\n", argv[optind], uuidbuf);
 		ret = qgroup_verify_all(gfs_info);
 		err |= !!ret;
 		if (ret >= 0)
@@ -10440,6 +10440,7 @@ static int cmd_check(const struct cmd_struct *cmd, int argc, char **argv)
 				goto close_out;
 			}
 
+			pr_verbose(LOG_DEFAULT, "Fill checksum tree\n");
 			ret = fill_csum_tree(trans, init_extent_tree);
 			err |= !!ret;
 			if (ret) {
@@ -10453,8 +10454,11 @@ static int cmd_check(const struct cmd_struct *cmd, int argc, char **argv)
 		 */
 		ret = btrfs_commit_transaction(trans, gfs_info->tree_root);
 		err |= !!ret;
-		if (ret)
+		if (ret) {
+			errno = -ret;
+			error_msg(ERROR_MSG_COMMIT_TRANS, "%m");
 			goto close_out;
+		}
 	}
 
 	ret = check_global_roots_uptodate();
@@ -10513,8 +10517,7 @@ static int cmd_check(const struct cmd_struct *cmd, int argc, char **argv)
 	task_stop(g_task_ctx.info);
 	err |= !!ret;
 	if (ret)
-		error(
-		"errors found in extent allocation tree or chunk allocation");
+		error("errors found in extent allocation tree or chunk allocation");
 
 	/* Only re-check super size after we checked and repaired the fs */
 	err |= !is_super_size_valid();

check/mode-common.c

@@ -1070,8 +1070,12 @@ int recow_extent_buffer(struct btrfs_root *root, struct extent_buffer *eb)
 	}
 
 	trans = btrfs_start_transaction(root, 1);
-	if (IS_ERR(trans))
-		return PTR_ERR(trans);
+	if (IS_ERR(trans)) {
+		ret = PTR_ERR(trans);
+		errno = -ret;
+		error_msg(ERROR_MSG_START_TRANS, "%m");
+		return ret;
+	}
 
 	path.lowest_level = btrfs_header_level(eb);
 	if (path.lowest_level)