btrfs-progs: make checksum type explicit in mkfs context structure

Add checksum type to the definition structure for a new filesystem, this
will be used in following patches.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: David Sterba <dsterba@suse.com>

convert/main.c

@@ -1158,6 +1158,7 @@ static int do_convert(const char *devname, u32 convert_flags, u32 nodesize,
 	printf("\tfeatures:  %s\n", features_buf);
 
 	memset(&mkfs_cfg, 0, sizeof(mkfs_cfg));
+	mkfs_cfg.csum_type = BTRFS_CSUM_TYPE_CRC32;
 	mkfs_cfg.label = cctx.volume_name;
 	mkfs_cfg.num_bytes = total_bytes;
 	mkfs_cfg.nodesize = nodesize;

ctree.h

@@ -165,7 +165,9 @@ struct btrfs_free_space_ctl;
 #define BTRFS_CSUM_SIZE 32
 
 /* csum types */
-#define BTRFS_CSUM_TYPE_CRC32	0
+enum btrfs_csum_type {
+	BTRFS_CSUM_TYPE_CRC32		= 0,
+};
 
 /* four bytes for CRC32 */
 static int btrfs_csum_sizes[] = { 4 };

mkfs/common.h

@@ -53,6 +53,8 @@ struct btrfs_mkfs_config {
 	u64 features;
 	/* Size of the filesystem in bytes */
 	u64 num_bytes;
+	/* checksum algorithm to use */
+	enum btrfs_csum_type csum_type;
 
 	/* Output fields, set during creation */
 

mkfs/main.c

@@ -1169,6 +1169,7 @@ int BOX_MAIN(mkfs)(int argc, char **argv)
 		warning("metadata has lower redundancy than data!\n");
 	}
 
+	mkfs_cfg.csum_type = BTRFS_CSUM_TYPE_CRC32;
 	mkfs_cfg.label = label;
 	memcpy(mkfs_cfg.fs_uuid, fs_uuid, sizeof(mkfs_cfg.fs_uuid));
 	mkfs_cfg.num_bytes = dev_block_count;