fsck.f2fs: add "-l" to show the layout information

This patch add an option to print out superblock and checkpoint only.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

3 files changed, 41 insertions, 10 deletions

diff --git a/fsck/main.c b/fsck/main.c
index f42ab0c..904b09c 100644
--- a/fsck/main.c
+++ b/fsck/main.c
@@ -71,6 +71,7 @@ void fsck_usage()
 	MSG(0, "  -d debug level [default:0]\n");
 	MSG(0, "  -f check/fix entire partition\n");
 	MSG(0, "  -g add default options\n");
+	MSG(0, "  -l show superblock/checkpoint\n");
 	MSG(0, "  -O feature1[feature2,feature3,...] e.g. \"encrypt\"\n");
 	MSG(0, "  -p preen mode [default:0 the same as -a [0|1]]\n");
 	MSG(0, "  -S sparse_mode\n");
@@ -226,7 +227,7 @@ void f2fs_parse_options(int argc, char *argv[])
 	}
 
 	if (!strcmp("fsck.f2fs", prog)) {
-		const char *option_string = ":aC:c:m:d:fg:O:p:q:StyV";
+		const char *option_string = ":aC:c:m:d:fg:lO:p:q:StyV";
 		int opt = 0, val;
 		char *token;
 		struct option long_opt[] = {
@@ -273,6 +274,9 @@ void f2fs_parse_options(int argc, char *argv[])
 				if (!strcmp(optarg, "android"))
 					c.defset = CONF_ANDROID;
 				break;
+			case 'l':
+				c.layout = 1;
+				break;
 			case 'O':
 				if (parse_feature(feature_table, optarg))
 					fsck_usage();
diff --git a/fsck/mount.c b/fsck/mount.c
index cc140a3..f7763c9 100644
--- a/fsck/mount.c
+++ b/fsck/mount.c
@@ -369,11 +369,16 @@ static void DISP_label(u_int16_t *name)
 	char buffer[MAX_VOLUME_NAME];
 
 	utf16_to_utf8(buffer, name, MAX_VOLUME_NAME, MAX_VOLUME_NAME);
-	printf("%-30s" "\t\t[%s]\n", "volum_name", buffer);
+	if (c.layout)
+		printf("%-30s %s\n", "Filesystem volume name:", buffer);
+	else
+		printf("%-30s" "\t\t[%s]\n", "volum_name", buffer);
 }
 
 void print_raw_sb_info(struct f2fs_super_block *sb)
 {
+	if (c.layout)
+		goto printout;
 	if (!c.dbg_lv)
 		return;
 
@@ -381,7 +386,7 @@ void print_raw_sb_info(struct f2fs_super_block *sb)
 	printf("+--------------------------------------------------------+\n");
 	printf("| Super block                                            |\n");
 	printf("+--------------------------------------------------------+\n");
-
+printout:
 	DISP_u32(sb, magic);
 	DISP_u32(sb, major_ver);
 
@@ -427,6 +432,8 @@ void print_ckpt_info(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_checkpoint *cp = F2FS_CKPT(sbi);
 
+	if (c.layout)
+		goto printout;
 	if (!c.dbg_lv)
 		return;
 
@@ -434,7 +441,7 @@ void print_ckpt_info(struct f2fs_sb_info *sbi)
 	printf("+--------------------------------------------------------+\n");
 	printf("| Checkpoint                                             |\n");
 	printf("+--------------------------------------------------------+\n");
-
+printout:
 	DISP_u64(cp, checkpoint_ver);
 	DISP_u64(cp, user_block_count);
 	DISP_u64(cp, valid_block_count);
@@ -3535,6 +3542,8 @@ int f2fs_do_mount(struct f2fs_sb_info *sbi)
 		if (get_cp(ckpt_flags) & CP_QUOTA_NEED_FSCK_FLAG)
 			c.fix_on = 1;
 	}
+	if (c.layout)
+		return 1;
 
 	if (tune_sb_features(sbi))
 		return -1;
diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
index 5d49ed1..66547a3 100644
--- a/include/f2fs_fs.h
+++ b/include/f2fs_fs.h
@@ -240,14 +240,14 @@ static inline uint64_t bswap_64(uint64_t val)
 
 #define MSG(n, fmt, ...)						\
 	do {								\
-		if (c.dbg_lv >= n) {					\
+		if (c.dbg_lv >= n && !c.layout) {			\
 			printf(fmt, ##__VA_ARGS__);			\
 		}							\
 	} while (0)
 
 #define DBG(n, fmt, ...)						\
 	do {								\
-		if (c.dbg_lv >= n) {					\
+		if (c.dbg_lv >= n && !c.layout) {			\
 			printf("[%s:%4d] " fmt,				\
 				__func__, __LINE__, ##__VA_ARGS__);	\
 		}							\
@@ -262,7 +262,11 @@ static inline uint64_t bswap_64(uint64_t val)
 #define DISP_u16(ptr, member)						\
 	do {								\
 		assert(sizeof((ptr)->member) == 2);			\
-		printf("%-30s" "\t\t[0x%8x : %u]\n",			\
+		if (c.layout)						\
+			printf("%-30s %u\n",				\
+			#member":", le16_to_cpu(((ptr)->member)));	\
+		else							\
+			printf("%-30s" "\t\t[0x%8x : %u]\n",		\
 			#member, le16_to_cpu(((ptr)->member)),		\
 			le16_to_cpu(((ptr)->member)));			\
 	} while (0)
@@ -270,7 +274,11 @@ static inline uint64_t bswap_64(uint64_t val)
 #define DISP_u32(ptr, member)						\
 	do {								\
 		assert(sizeof((ptr)->member) <= 4);			\
-		printf("%-30s" "\t\t[0x%8x : %u]\n",			\
+		if (c.layout)						\
+			printf("%-30s %u\n",				\
+			#member":", le32_to_cpu(((ptr)->member)));	\
+		else							\
+			printf("%-30s" "\t\t[0x%8x : %u]\n",		\
 			#member, le32_to_cpu(((ptr)->member)),		\
 			le32_to_cpu(((ptr)->member)));			\
 	} while (0)
@@ -278,14 +286,23 @@ static inline uint64_t bswap_64(uint64_t val)
 #define DISP_u64(ptr, member)						\
 	do {								\
 		assert(sizeof((ptr)->member) == 8);			\
-		printf("%-30s" "\t\t[0x%8llx : %llu]\n",		\
+		if (c.layout)						\
+			printf("%-30s %llu\n",				\
+			#member":", le64_to_cpu(((ptr)->member)));	\
+		else							\
+			printf("%-30s" "\t\t[0x%8llx : %llu]\n",	\
 			#member, le64_to_cpu(((ptr)->member)),		\
 			le64_to_cpu(((ptr)->member)));			\
 	} while (0)
 
 #define DISP_utf(ptr, member)						\
 	do {								\
-		printf("%-30s" "\t\t[%s]\n", #member, ((ptr)->member)); \
+		if (c.layout)						\
+			printf("%-30s %s\n", #member":",		\
+					((ptr)->member)); 		\
+		else							\
+			printf("%-30s" "\t\t[%s]\n", #member,		\
+					((ptr)->member));		\
 	} while (0)
 
 /* Display to buffer */
@@ -472,6 +489,7 @@ struct f2fs_configuration {
 	int bug_nat_bits;
 	int alloc_failed;
 	int auto_fix;
+	int layout;
 	int quota_fix;
 	int preen_mode;
 	int ro;