FAT32 support from NetBSD by Wolfgang Solfrank.

1 files changed, 70 insertions, 2 deletions

diff --git a/sys/msdosfs/bpb.h b/sys/msdosfs/bpb.h
index 445940d924a..399e592530b 100644
--- a/sys/msdosfs/bpb.h
+++ b/sys/msdosfs/bpb.h
@@ -1,5 +1,5 @@
-/*	$OpenBSD: bpb.h,v 1.2 1997/02/24 14:32:47 niklas Exp $	*/
-/*	$NetBSD: bpb.h,v 1.5 1995/07/24 06:37:15 leo Exp $	*/
+/*	$OpenBSD: bpb.h,v 1.3 1998/01/11 20:39:03 provos Exp $	*/
+/*	$NetBSD: bpb.h,v 1.6 1997/10/17 11:23:35 ws Exp $	*/
 
 /*
  * Written by Paul Popelka (paulp@uts.amdahl.com)
@@ -53,6 +53,34 @@ struct bpb50 {
 	u_int32_t	bpbHugeSectors;	/* # of sectors if bpbSectors == 0 */
 };
 
+/*
+ * BPB for DOS 7.10 (FAT32).  This one has a few extensions to bpb50.
+ */
+struct bpb710 {
+	u_int16_t	bpbBytesPerSec;	/* bytes per sector */
+	u_int8_t	bpbSecPerClust;	/* sectors per cluster */
+	u_int16_t	bpbResSectors;	/* number of reserved sectors */
+	u_int8_t	bpbFATs;	/* number of FATs */
+	u_int16_t	bpbRootDirEnts;	/* number of root directory entries */
+	u_int16_t	bpbSectors;	/* total number of sectors */
+	u_int8_t	bpbMedia;	/* media descriptor */
+	u_int16_t	bpbFATsecs;	/* number of sectors per FAT */
+	u_int16_t	bpbSecPerTrack;	/* sectors per track */
+	u_int16_t	bpbHeads;	/* number of heads */
+	u_int32_t	bpbHiddenSecs;	/* # of hidden sectors */
+	u_int32_t	bpbHugeSectors;	/* # of sectors if bpbSectors == 0 */
+	u_int32_t	bpbBigFATsecs;	/* like bpbFATsecs for FAT32 */
+	u_int16_t	bpbExtFlags;	/* extended flags: */
+#define	FATNUM		0xf		/* mask for numbering active FAT */
+#define	FATMIRROR	0x80		/* FAT is mirrored (like it always was) */
+	u_int16_t	bpbFSVers;	/* filesystem version */
+#define	FSVERS		0		/* currently only 0 is understood */
+	u_int32_t	bpbRootClust;	/* start cluster for root directory */
+	u_int16_t	bpbFSInfo;	/* filesystem info structure sector */
+	u_int16_t	bpbBackup;	/* backup boot sector */
+	/* There is a 12 byte filler here, but we ignore it */
+};
+
 #ifdef	atari
 /*
  * BPB for gemdos filesystems. Atari leaves the obsolete stuff undefined.
@@ -139,3 +167,43 @@ struct byte_bpb50 {
 	int8_t bpbHiddenSecs[4];	/* number of hidden sectors */
 	int8_t bpbHugeSectors[4];	/* # of sectors if bpbSectors == 0 */
 };
+
+/*
+ * BPB for DOS 7.10 (FAT32).  This one has a few extensions to bpb50.
+ */
+struct byte_bpb710 {
+	u_int8_t bpbBytesPerSec[2];	/* bytes per sector */
+	u_int8_t bpbSecPerClust;	/* sectors per cluster */
+	u_int8_t bpbResSectors[2];	/* number of reserved sectors */
+	u_int8_t bpbFATs;		/* number of FATs */
+	u_int8_t bpbRootDirEnts[2];	/* number of root directory entries */
+	u_int8_t bpbSectors[2];		/* total number of sectors */
+	u_int8_t bpbMedia;		/* media descriptor */
+	u_int8_t bpbFATsecs[2];		/* number of sectors per FAT */
+	u_int8_t bpbSecPerTrack[2];	/* sectors per track */
+	u_int8_t bpbHeads[2];		/* number of heads */
+	u_int8_t bpbHiddenSecs[4];	/* # of hidden sectors */
+	u_int8_t bpbHugeSectors[4];	/* # of sectors if bpbSectors == 0 */
+	u_int8_t bpbBigFATsecs[4];	/* like bpbFATsecs for FAT32 */
+	u_int8_t bpbExtFlags[2];	/* extended flags: */
+	u_int8_t bpbFSVers[2];		/* filesystem version */
+	u_int8_t bpbRootClust[4];	/* start cluster for root directory */
+	u_int8_t bpbFSInfo[2];		/* filesystem info structure sector */
+	u_int8_t bpbBackup[2];		/* backup boot sector */
+	/* There is a 12 byte filler here, but we ignore it */
+};
+
+/*
+ * FAT32 FSInfo block.
+ */
+struct fsinfo {
+	u_int8_t fsisig1[4];
+	u_int8_t fsifill1[480];
+	u_int8_t fsisig2[4];
+	u_int8_t fsinfree[4];
+	u_int8_t fsinxtfree[4];
+	u_int8_t fsifill2[12];
+	u_int8_t fsisig3[4];
+	u_int8_t fsifill3[508];
+	u_int8_t fsisig4[4];
+};