btrfs-progs: mkfs: add option to make it quiet

Add option to silecne mkfs and print only errors, warnings or info on
user request like features or help.

Based on patch from Goffredo Baroncelli <kreijack@inwind.it>
Signed-off-by: David Sterba <dsterba@suse.cz>

2 files changed, 33 insertions, 17 deletions

diff --git a/Documentation/mkfs.btrfs.asciidoc b/Documentation/mkfs.btrfs.asciidoc
index 985237f5..fd20ca55 100644
--- a/Documentation/mkfs.btrfs.asciidoc
+++ b/Documentation/mkfs.btrfs.asciidoc
@@ -17,6 +17,7 @@ $$[-l|--leafsize <leafsize>]$$
 $$[-L|--label <label>]$$
 $$[-m|--metadata <metadata profile>]$$
 $$[-M|--mixed]$$
+$$[-q|--quiet]$$
 $$[-s|--sectorsize <sectorsize>]$$
 $$[-r|--rootdir <rootdir>]$$
 $$[-K|--nodiscard]$$
@@ -88,6 +89,9 @@ utilization.  This feature incurs a performance penalty in
 larger filesystems.  It is recommended for use with filesystems
 of 1 GiB or smaller.
 
+-q|--quiet::
+Print only error or warning messages. Options --features or --help are unaffected.
+
 -s|--sectorsize <size>::
 Specify the sectorsize, the minimum data block allocation unit.
 +
diff --git a/mkfs.c b/mkfs.c
index 83c4a6a6..f73c5cbc 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -43,6 +43,7 @@
 #include "utils.h"
 
 static u64 index_cnt = 2;
+static int verbose = 1;
 
 struct directory_name_entry {
 	char *dir_name;
@@ -87,7 +88,9 @@ static int make_root_dir(struct btrfs_root *root, int mixed)
 					     BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 					     chunk_start, chunk_size);
 		BUG_ON(ret);
-		printf("Created a data/metadata chunk of size %llu\n", chunk_size);
+		if (verbose)
+			printf("Created a data/metadata chunk of size %llu\n",
+					chunk_size);
 	} else {
 		ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
 					&chunk_start, &chunk_size,
@@ -283,6 +286,7 @@ static void print_usage(void)
 	fprintf(stderr, "\t-K|--nodiscard          do not perform whole device TRIM\n");
 	fprintf(stderr, "\t-O|--features LIST      comma separated list of filesystem features, use '-O list-all' to list features\n");
 	fprintf(stderr, "\t-U|--uuid UUID          specify the filesystem UUID\n");
+	fprintf(stderr, "\t-q|--quiet              no messages except errors\n");
 	fprintf(stderr, "\t-V|--version            print the mkfs.btrfs version and exit\n");
 	fprintf(stderr, "%s\n", PACKAGE_STRING);
 	exit(1);
@@ -955,7 +959,8 @@ static int make_image(char *source_dir, struct btrfs_root *root, int out_fd)
 	}
 	btrfs_commit_transaction(trans, root);
 
-	printf("Making image is completed.\n");
+	if (verbose)
+		printf("Making image is completed.\n");
 	return 0;
 fail:
 	while (!list_empty(&dir_head.list)) {
@@ -1158,10 +1163,11 @@ int main(int ac, char **av)
 			{ "nodiscard", no_argument, NULL, 'K' },
 			{ "features", required_argument, NULL, 'O' },
 			{ "uuid", required_argument, NULL, 'U' },
+			{ "quiet", 0, NULL, 'q' },
 			{ NULL, 0, NULL, 0}
 		};
 
-		c = getopt_long(ac, av, "A:b:fl:n:s:m:d:L:O:r:U:VMK",
+		c = getopt_long(ac, av, "A:b:fl:n:s:m:d:L:O:r:U:VMKq",
 				long_options, NULL);
 		if (c < 0)
 			break;
@@ -1217,11 +1223,8 @@ int main(int ac, char **av)
 				break;
 			case 'b':
 				block_count = parse_size(optarg);
-				if (block_count <= BTRFS_MKFS_SMALL_VOLUME_SIZE) {
-					fprintf(stdout,
-				"SMALL VOLUME: forcing mixed metadata/data groups\n");
+				if (block_count <= BTRFS_MKFS_SMALL_VOLUME_SIZE)
 					mixed = 1;
-				}
 				zero_end = 0;
 				break;
 			case 'V':
@@ -1237,6 +1240,9 @@ int main(int ac, char **av)
 			case 'K':
 				discard = 0;
 				break;
+			case 'q':
+				verbose = 0;
+				break;
 			default:
 				print_usage();
 		}
@@ -1283,8 +1289,9 @@ int main(int ac, char **av)
 	file = av[optind++];
 	ssd = is_ssd(file);
 
-	if (is_vol_small(file)) {
-		printf("SMALL VOLUME: forcing mixed metadata/data groups\n");
+	if (is_vol_small(file) || mixed) {
+		if (verbose)
+			printf("SMALL VOLUME: forcing mixed metadata/data groups\n");
 		mixed = 1;
 	}
 
@@ -1294,7 +1301,7 @@ int main(int ac, char **av)
 	*/
 	if (!mixed) {
 		if (!metadata_profile_opt) {
-			if (dev_cnt == 1 && ssd)
+			if (dev_cnt == 1 && ssd && verbose)
 				printf("Detected a SSD, turning off metadata "
 				"duplication.  Mkfs with -m dup if you want to "
 				"force metadata duplication.\n");
@@ -1368,8 +1375,10 @@ int main(int ac, char **av)
 	}
 
 	/* if we are here that means all devs are good to btrfsify */
-	printf("%s\n", PACKAGE_STRING);
-	printf("See %s for more information.\n\n", PACKAGE_URL);
+	if (verbose) {
+		printf("%s\n", PACKAGE_STRING);
+		printf("See %s for more information.\n\n", PACKAGE_URL);
+	}
 
 	dev_cnt--;
 
@@ -1447,7 +1456,8 @@ int main(int ac, char **av)
 		features |= BTRFS_FEATURE_INCOMPAT_RAID56;
 	}
 
-	btrfs_process_fs_features(features);
+	if (verbose)
+		btrfs_process_fs_features(features);
 
 	ret = make_btrfs(fd, file, label, fs_uuid, blocks, dev_block_count,
 			 nodesize, sectorsize, stripesize, features);
@@ -1526,10 +1536,12 @@ raid_groups:
 	ret = create_data_reloc_tree(trans, root);
 	BUG_ON(ret);
 
-	printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
-	    "sectorsize %u size %s\n",
-	    label, first_file, nodesize, nodesize, sectorsize,
-	    pretty_size(btrfs_super_total_bytes(root->fs_info->super_copy)));
+	if (verbose) {
+		printf(
+	"fs created label %s on %s\n\tnodesize %u leafsize %u sectorsize %u size %s\n",
+		    label, first_file, nodesize, nodesize, sectorsize,
+		    pretty_size(btrfs_super_total_bytes(root->fs_info->super_copy)));
+	}
 
 	btrfs_commit_transaction(trans, root);