add header command

1 files changed, 9 insertions, 6 deletions

diff --git a/gpt/gpt.ha b/gpt/gpt.ha
index f104584..9474830 100644
--- a/gpt/gpt.ha
+++ b/gpt/gpt.ha
@@ -131,23 +131,25 @@ export fn create(fd: io::file, freeno: size) *gpt = {
 	const mbr_sec = sector::map(fd, 0, 1);
 	const mbr = mbr_sec.buf: *[*]u8: *mbr::bootsector;
 
+	*mbr = mbr::bootsector {
+		magic = 0xaa55,
+		...
+	};
+
 	const prim_header_sec = sector::map(fd, 1, 1);
 	const prim_header = prim_header_sec.buf: *[*]u8: *header;
 	*prim_header = header {
 		signature = 0x5452415020494645,
 		revision = 0x10000,
 		header_size = 92,
-		header_crc32 = 0,
-		reserved0 = 0,
 		header_lba = 1,
 		backup_header_lba = bheader_begin,
 		first_lba = free_begin,
 		last_lba = bentries_begin - 1,
-		disk_guid = [0xCAFEBABE, 0xCAFEBABE],
 		entries_lba = entries_begin,
 		entries_len = 128,
 		entry_size = 128,
-		entries_crc32 = 0,
+		...
 	};
 
 	const prim_entries_sec = sector::map(fd, entries_begin, 128*128/512);
@@ -286,6 +288,9 @@ export fn mkbackup(self: *gpt) void = {
 	self.backup.header.header_lba = self.backup.header_sec.offs;
 	self.backup.header.backup_header_lba = self.primary.header_sec.offs;
 	self.backup.header.entries_lba = self.backup.entries_sec.offs;
+
+	self.backup.header.entries_crc32 = entries_crc32(self.backup.entries);
+	self.backup.header.header_crc32 = header_crc32(self.backup.header);
 };
 
 // Commits changed done on the data structure to the disk
@@ -298,7 +303,5 @@ export fn commit(self: *gpt) (void | io::error) = {
 // Updates the CRC32 checksums of the different blocks
 export fn chksums(self: *gpt) void = {
 	self.primary.header.entries_crc32 = entries_crc32(self.primary.entries);
-	self.backup.header.entries_crc32 = entries_crc32(self.backup.entries);
 	self.primary.header.header_crc32 = header_crc32(self.primary.header);
-	self.backup.header.header_crc32 = header_crc32(self.backup.header);
 };