btrfs-progs: switch more error messages to common helpers

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

cmds-fi-du.c

@@ -427,8 +427,7 @@ static int du_add_file(const char *filename, int dirfd,
 		return 0;
 
 	if (len > (path_max - pathp)) {
-		fprintf(stderr, "ERROR: Path max exceeded: %s %s\n", path,
-			filename);
+		error("path too long: %s %s", path, filename);
 		return ENAMETOOLONG;
 	}
 
@@ -534,7 +533,7 @@ const char * const cmd_filesystem_du_usage[] = {
 
 int cmd_filesystem_du(int argc, char **argv)
 {
-	int ret = 0, error = 0;
+	int ret = 0, err = 0;
 	int i;
 
 	unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
@@ -566,14 +565,14 @@ int cmd_filesystem_du(int argc, char **argv)
 	for (i = optind; i < argc; i++) {
 		ret = du_add_file(argv[i], AT_FDCWD, NULL, NULL, NULL, 1);
 		if (ret) {
-			fprintf(stderr, "ERROR: can't check space of '%s': %s\n",
-				argv[i], strerror(ret));
-			error = 1;
+			error("cannot check space of '%s': %s", argv[i],
+					strerror(ret));
+			err = 1;
 		}
 
 		/* reset hard-link detection for each argument */
 		clear_seen_inodes();
 	}
 
-	return error;
+	return err;
 }

cmds-inspect-dump-super.c

@@ -62,7 +62,7 @@ static void print_sys_chunk_array(struct btrfs_super_block *sb)
 
 	buf = malloc(sizeof(*buf) + sizeof(*sb));
 	if (!buf) {
-		fprintf(stderr, "%s\n", strerror(ENOMEM));
+		error("not enough memory");
 		goto out;
 	}
 	write_extent_buffer(buf, sb, 0, sizeof(*sb));
@@ -424,19 +424,16 @@ static int load_and_dump_sb(char *filename, int fd, u64 sb_bytenr, int full,
 		if (ret == 0 && errno == 0)
 			return 0;
 
-		fprintf(stderr,
-		   "ERROR: Failed to read the superblock on %s at %llu\n",
-		   filename, (unsigned long long)sb_bytenr);
-		fprintf(stderr,
-		   "ERROR: error = '%s', errno = %d\n", strerror(errno), errno);
+		error("failed to read the superblock on %s at %llu",
+				filename, (unsigned long long)sb_bytenr);
+		error("error = '%s', errno = %d", strerror(errno), errno);
 		return 1;
 	}
 	printf("superblock: bytenr=%llu, device=%s\n", sb_bytenr, filename);
 	printf("---------------------------------------------------------\n");
 	if (btrfs_super_magic(sb) != BTRFS_MAGIC && !force) {
-		fprintf(stderr,
-		    "ERROR: bad magic on superblock on %s at %llu\n",
-		    filename, (unsigned long long)sb_bytenr);
+		error("bad magic on superblock on %s at %llu",
+				filename, (unsigned long long)sb_bytenr);
 	} else {
 		dump_superblock(sb, full);
 	}
@@ -472,9 +469,8 @@ int cmd_inspect_dump_super(int argc, char **argv)
 		case 'i':
 			arg = arg_strtou64(optarg);
 			if (arg >= BTRFS_SUPER_MIRROR_MAX) {
-				fprintf(stderr,
-					"Illegal super_mirror %llu\n",
-					arg);
+				error("super mirror too big: %llu >= %d",
+					arg, BTRFS_SUPER_MIRROR_MAX);
 				usage(cmd_inspect_dump_super_usage);
 			}
 			sb_bytenr = btrfs_sb_offset(arg);
@@ -505,7 +501,7 @@ int cmd_inspect_dump_super(int argc, char **argv)
 		filename = argv[i];
 		fd = open(filename, O_RDONLY, 0666);
 		if (fd < 0) {
-			fprintf(stderr, "Could not open %s\n", filename);
+			error("cannot open %s: %s", filename, strerror(errno));
 			ret = 1;
 			goto out;
 		}

cmds-inspect-dump-tree.c

@@ -191,20 +191,19 @@ int cmd_inspect_dump_tree(int argc, char **argv)
 
 	ret = check_arg_type(argv[optind]);
 	if (ret != BTRFS_ARG_BLKDEV && ret != BTRFS_ARG_REG) {
-		fprintf(stderr, "'%s' is not a block device or regular file\n",
-			argv[optind]);
+		error("not a block device or regular file: %s", argv[optind]);
 		goto out;
 	}
 
 	info = open_ctree_fs_info(argv[optind], 0, 0, OPEN_CTREE_PARTIAL);
 	if (!info) {
-		fprintf(stderr, "unable to open %s\n", argv[optind]);
+		error("unable to open %s", argv[optind]);
 		goto out;
 	}
 
 	root = info->fs_root;
 	if (!root) {
-		fprintf(stderr, "unable to open %s\n", argv[optind]);
+		error("unable to open %s", argv[optind]);
 		goto out;
 	}
 
@@ -225,7 +224,7 @@ int cmd_inspect_dump_tree(int argc, char **argv)
 					      root->nodesize, 0);
 		}
 		if (!extent_buffer_uptodate(leaf)) {
-			fprintf(stderr, "failed to read %llu\n",
+			error("failed to read %llu",
 				(unsigned long long)block_only);
 			goto close_root;
 		}

cmds-inspect.c

@@ -53,7 +53,7 @@ static int __ino_to_path_fd(u64 inum, int fd, int verbose, const char *prepend)
 
 	ret = ioctl(fd, BTRFS_IOC_INO_PATHS, &ipa);
 	if (ret < 0) {
-		printf("ioctl ret=%d, error: %s\n", ret, strerror(errno));
+		error("ino paths ioctl: %s", strerror(errno));
 		goto out;
 	}
 
@@ -192,7 +192,7 @@ static int cmd_inspect_logical_resolve(int argc, char **argv)
 
 	ret = ioctl(fd, BTRFS_IOC_LOGICAL_INO, &loi);
 	if (ret < 0) {
-		printf("ioctl ret=%d, error: %s\n", ret, strerror(errno));
+		error("logical ino ioctl: %s", strerror(errno));
 		goto out;
 	}
 
@@ -283,8 +283,7 @@ static int cmd_inspect_subvolid_resolve(int argc, char **argv)
 	ret = btrfs_subvolid_resolve(fd, path, sizeof(path), subvol_id);
 
 	if (ret) {
-		fprintf(stderr,
-			"btrfs_subvolid_resolve(subvol_id %llu) failed with ret=%d\n",
+		error("resolving subvolid %llu error %d",
 			(unsigned long long)subvol_id, ret);
 		goto out;
 	}
@@ -323,7 +322,7 @@ static int cmd_inspect_rootid(int argc, char **argv)
 
 	ret = lookup_ino_rootid(fd, &rootid);
 	if (ret) {
-		fprintf(stderr, "rootid failed with ret=%d\n", ret);
+		error("rootid failed with ret=%d", ret);
 		goto out;
 	}
 
@@ -521,9 +520,7 @@ static int print_min_dev_size(int fd, u64 devid)
 
 		ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
 		if (ret < 0) {
-			fprintf(stderr,
-				"Error invoking tree search ioctl: %s\n",
-				strerror(errno));
+			error("tree search ioctl: %s", strerror(errno));
 			ret = 1;
 			goto out;
 		}
@@ -559,7 +556,7 @@ static int print_min_dev_size(int fd, u64 devid)
 				ret = add_dev_extent(&holes, last_pos,
 						     sh->offset - 1, 1);
 			if (ret) {
-				fprintf(stderr, "Error: %s\n", strerror(-ret));
+				error("add device extent: %s", strerror(-ret));
 				ret = 1;
 				goto out;
 			}