libfdisk: add basic structs

Signed-off-by: Karel Zak <kzak@redhat.com>

1 files changed, 105 insertions, 0 deletions

diff --git a/libfdisk/src/fdiskP.h b/libfdisk/src/fdiskP.h
index 534916610..82443453a 100644
--- a/libfdisk/src/fdiskP.h
+++ b/libfdisk/src/fdiskP.h
@@ -84,4 +84,109 @@ extern int fdisk_debug_mask;
 # define DBG_FLUSH do { ; } while(0)
 #endif
 
+typedef unsigned long long sector_t;
+
+/*
+ * Supported partition table types (labels)
+ */
+enum fdisk_labeltype {
+	FDISK_DISKLABEL_DOS = 1,
+	FDISK_DISKLABEL_SUN = 2,
+	FDISK_DISKLABEL_SGI = 4,
+	FDISK_DISKLABEL_AIX = 8,
+	FDISK_DISKLABEL_OSF = 16,
+	FDISK_DISKLABEL_MAC = 32,
+	FDISK_DISKLABEL_GPT = 64,
+	FDISK_DISKLABEL_ANY = -1
+};
+
+/*
+ * Partition types
+ */
+struct fdisk_parttype {
+	unsigned int	type;		/* type as number or zero */
+	const char	*name;		/* description */
+	char		*typestr;	/* type as string or NULL */
+
+	unsigned int	flags;		/* FDISK_PARTTYPE_* flags */
+};
+
+enum {
+	FDISK_PARTTYPE_UNKNOWN		= (1 << 1),
+	FDISK_PARTTYPE_INVISIBLE	= (1 << 2),
+	FDISK_PARTTYPE_ALLOCATED	= (1 << 3)
+};
+
+#define fdisk_parttype_is_unknown(_x)	((_x) && ((_x)->flags & FDISK_PARTTYPE_UNKNONW))
+#define fdisk_parttype_is_invisible(_x)	((_x) && ((_x)->flags & FDISK_PARTTYPE_INVISIBLE))
+#define fdisk_parttype_is_allocated(_x)	((_x) && ((_x)->flags & FDISK_PARTTYPE_ALLOCATED))
+
+/*
+ * Legacy CHS based geometry
+ */
+struct fdisk_geometry {
+	unsigned int heads;
+	sector_t sectors;
+	sector_t cylinders;
+};
+
+struct fdisk_context {
+	int dev_fd;         /* device descriptor */
+	char *dev_path;     /* device path */
+	unsigned char *firstsector; /* buffer with master boot record */
+
+	/* topology */
+	unsigned long io_size;		/* I/O size used by fdisk */
+	unsigned long optimal_io_size;	/* optional I/O returned by device */
+	unsigned long min_io_size;	/* minimal I/O size */
+	unsigned long phy_sector_size;	/* physical size */
+	unsigned long sector_size;	/* logical size */
+	unsigned long alignment_offset;
+
+	enum fdisk_labeltype disklabel;	/* current disklabel */
+
+	/* alignment */
+	unsigned long grain;		/* alignment unit */
+	sector_t first_lba;		/* recommended begin of the first partition */
+
+	/* geometry */
+	sector_t total_sectors; /* in logical sectors */
+	struct fdisk_geometry geom;
+
+	/* label operations and description */
+	const struct fdisk_label *label;
+};
+
+#define fdisk_is_disklabel(c, x) fdisk_dev_is_disklabel(c, FDISK_DISKLABEL_ ## x)
+
+/*
+ * Label specific operations
+ */
+struct fdisk_label {
+	const char *name;
+
+	/* array with partition types */
+	struct fdisk_parttype	*parttypes;
+	size_t			nparttypes;	/* number of items in parttypes[] */
+
+	/* probe disk label */
+	int (*probe)(struct fdisk_context *cxt);
+	/* write in-memory changes to disk */
+	int (*write)(struct fdisk_context *cxt);
+	/* verify the partition table */
+	int (*verify)(struct fdisk_context *cxt);
+	/* create new disk label */
+	int (*create)(struct fdisk_context *cxt);
+	/* new partition */
+	int (*part_add)(struct fdisk_context *cxt, int partnum, struct fdisk_parttype *t);
+	/* delete partition */
+	int (*part_delete)(struct fdisk_context *cxt, int partnum);
+	/* get partition type */
+	struct fdisk_parttype *(*part_get_type)(struct fdisk_context *cxt, int partnum);
+	/* set partition type */
+	int (*part_set_type)(struct fdisk_context *cxt, int partnum, struct fdisk_parttype *t);
+	/* refresh alignment setting */
+	int (*reset_alignment)(struct fdisk_context *cxt);
+};
+
 #endif /* _LIBFDISK_PRIVATE_H */