mdadm (3.3.2-5) unstable; urgency=medium

  * use-tempnode-not-devnode.patch: change udev rules file to use
    $tempnode which works both on wheezy and jessie udev, instead
    of $devnode which only works in jessie.  At this stage it is
    better to make rules file compatible with old version instead
    of adding versioned dependency.  Should be removed for jessie+1.
    (Closes: #770883)
  * fix Closes: list in previous entry (Closes: #771852)

# imported from the archive

1 files changed, 5303 insertions, 0 deletions

diff --git a/super-ddf.c b/super-ddf.c
new file mode 100644
index 00000000..bc0ce2c0
--- /dev/null
+++ b/super-ddf.c
@@ -0,0 +1,5303 @@
+/*
+ * mdadm - manage Linux "md" devices aka RAID arrays.
+ *
+ * Copyright (C) 2006-2014 Neil Brown <neilb@suse.de>
+ *
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *    Author: Neil Brown
+ *    Email: <neil@brown.name>
+ *
+ * Specifications for DDF taken from Common RAID DDF Specification Revision 1.2
+ * (July 28 2006).  Reused by permission of SNIA.
+ */
+
+#define HAVE_STDINT_H 1
+#include "mdadm.h"
+#include "mdmon.h"
+#include "sha1.h"
+#include <values.h>
+#include <stddef.h>
+
+/* a non-official T10 name for creation GUIDs */
+static char T10[] = "Linux-MD";
+
+/* DDF timestamps are 1980 based, so we need to add
+ * second-in-decade-of-seventies to convert to linux timestamps.
+ * 10 years with 2 leap years.
+ */
+#define DECADE (3600*24*(365*10+2))
+unsigned long crc32(
+	unsigned long crc,
+	const unsigned char *buf,
+	unsigned len);
+
+#define DDF_NOTFOUND (~0U)
+#define DDF_CONTAINER (DDF_NOTFOUND-1)
+
+/* Default for safe_mode_delay. Same value as for IMSM.
+ */
+static const int DDF_SAFE_MODE_DELAY = 4000;
+
+/* The DDF metadata handling.
+ * DDF metadata lives at the end of the device.
+ * The last 512 byte block provides an 'anchor' which is used to locate
+ * the rest of the metadata which usually lives immediately behind the anchor.
+ *
+ * Note:
+ *  - all multibyte numeric fields are bigendian.
+ *  - all strings are space padded.
+ *
+ */
+
+typedef struct __be16 {
+	__u16 _v16;
+} be16;
+#define be16_eq(x, y) ((x)._v16 == (y)._v16)
+#define be16_and(x, y) ((x)._v16 & (y)._v16)
+#define be16_or(x, y) ((x)._v16 | (y)._v16)
+#define be16_clear(x, y) ((x)._v16 &= ~(y)._v16)
+#define be16_set(x, y) ((x)._v16 |= (y)._v16)
+
+typedef struct __be32 {
+	__u32 _v32;
+} be32;
+#define be32_eq(x, y) ((x)._v32 == (y)._v32)
+
+typedef struct __be64 {
+	__u64 _v64;
+} be64;
+#define be64_eq(x, y) ((x)._v64 == (y)._v64)
+
+#define be16_to_cpu(be) __be16_to_cpu((be)._v16)
+static inline be16 cpu_to_be16(__u16 x)
+{
+	be16 be = { ._v16 = __cpu_to_be16(x) };
+	return be;
+}
+
+#define be32_to_cpu(be) __be32_to_cpu((be)._v32)
+static inline be32 cpu_to_be32(__u32 x)
+{
+	be32 be = { ._v32 = __cpu_to_be32(x) };
+	return be;
+}
+
+#define be64_to_cpu(be) __be64_to_cpu((be)._v64)
+static inline be64 cpu_to_be64(__u64 x)
+{
+	be64 be = { ._v64 = __cpu_to_be64(x) };
+	return be;
+}
+
+/* Primary Raid Level (PRL) */
+#define	DDF_RAID0	0x00
+#define	DDF_RAID1	0x01
+#define	DDF_RAID3	0x03
+#define	DDF_RAID4	0x04
+#define	DDF_RAID5	0x05
+#define	DDF_RAID1E	0x11
+#define	DDF_JBOD	0x0f
+#define	DDF_CONCAT	0x1f
+#define	DDF_RAID5E	0x15
+#define	DDF_RAID5EE	0x25
+#define	DDF_RAID6	0x06
+
+/* Raid Level Qualifier (RLQ) */
+#define	DDF_RAID0_SIMPLE	0x00
+#define	DDF_RAID1_SIMPLE	0x00 /* just 2 devices in this plex */
+#define	DDF_RAID1_MULTI		0x01 /* exactly 3 devices in this plex */
+#define	DDF_RAID3_0		0x00 /* parity in first extent */
+#define	DDF_RAID3_N		0x01 /* parity in last extent */
+#define	DDF_RAID4_0		0x00 /* parity in first extent */
+#define	DDF_RAID4_N		0x01 /* parity in last extent */
+/* these apply to raid5e and raid5ee as well */
+#define	DDF_RAID5_0_RESTART	0x00 /* same as 'right asymmetric' - layout 1 */
+#define	DDF_RAID6_0_RESTART	0x01 /* raid6 different from raid5 here!!! */
+#define	DDF_RAID5_N_RESTART	0x02 /* same as 'left asymmetric' - layout 0 */
+#define	DDF_RAID5_N_CONTINUE	0x03 /* same as 'left symmetric' - layout 2 */
+
+#define	DDF_RAID1E_ADJACENT	0x00 /* raid10 nearcopies==2 */
+#define	DDF_RAID1E_OFFSET	0x01 /* raid10 offsetcopies==2 */
+
+/* Secondary RAID Level (SRL) */
+#define	DDF_2STRIPED	0x00	/* This is weirder than RAID0 !! */
+#define	DDF_2MIRRORED	0x01
+#define	DDF_2CONCAT	0x02
+#define	DDF_2SPANNED	0x03	/* This is also weird - be careful */
+
+/* Magic numbers */
+#define	DDF_HEADER_MAGIC	cpu_to_be32(0xDE11DE11)
+#define	DDF_CONTROLLER_MAGIC	cpu_to_be32(0xAD111111)
+#define	DDF_PHYS_RECORDS_MAGIC	cpu_to_be32(0x22222222)
+#define	DDF_PHYS_DATA_MAGIC	cpu_to_be32(0x33333333)
+#define	DDF_VIRT_RECORDS_MAGIC	cpu_to_be32(0xDDDDDDDD)
+#define	DDF_VD_CONF_MAGIC	cpu_to_be32(0xEEEEEEEE)
+#define	DDF_SPARE_ASSIGN_MAGIC	cpu_to_be32(0x55555555)
+#define	DDF_VU_CONF_MAGIC	cpu_to_be32(0x88888888)
+#define	DDF_VENDOR_LOG_MAGIC	cpu_to_be32(0x01dBEEF0)
+#define	DDF_BBM_LOG_MAGIC	cpu_to_be32(0xABADB10C)
+
+#define	DDF_GUID_LEN	24
+#define DDF_REVISION_0	"01.00.00"
+#define DDF_REVISION_2	"01.02.00"
+
+struct ddf_header {
+	be32	magic;		/* DDF_HEADER_MAGIC */
+	be32	crc;
+	char	guid[DDF_GUID_LEN];
+	char	revision[8];	/* 01.02.00 */
+	be32	seq;		/* starts at '1' */
+	be32	timestamp;
+	__u8	openflag;
+	__u8	foreignflag;
+	__u8	enforcegroups;
+	__u8	pad0;		/* 0xff */
+	__u8	pad1[12];	/* 12 * 0xff */
+	/* 64 bytes so far */
+	__u8	header_ext[32];	/* reserved: fill with 0xff */
+	be64	primary_lba;
+	be64	secondary_lba;
+	__u8	type;
+	__u8	pad2[3];	/* 0xff */
+	be32	workspace_len;	/* sectors for vendor space -
+				 * at least 32768(sectors) */
+	be64	workspace_lba;
+	be16	max_pd_entries;	/* one of 15, 63, 255, 1023, 4095 */
+	be16	max_vd_entries; /* 2^(4,6,8,10,12)-1 : i.e. as above */
+	be16	max_partitions; /* i.e. max num of configuration
+				   record entries per disk */
+	be16	config_record_len; /* 1 +ROUNDUP(max_primary_element_entries
+				                 *12/512) */
+	be16	max_primary_element_entries; /* 16, 64, 256, 1024, or 4096 */
+	__u8	pad3[54];	/* 0xff */
+	/* 192 bytes so far */
+	be32	controller_section_offset;
+	be32	controller_section_length;
+	be32	phys_section_offset;
+	be32	phys_section_length;
+	be32	virt_section_offset;
+	be32	virt_section_length;
+	be32	config_section_offset;
+	be32	config_section_length;
+	be32	data_section_offset;
+	be32	data_section_length;
+	be32	bbm_section_offset;
+	be32	bbm_section_length;
+	be32	diag_space_offset;
+	be32	diag_space_length;
+	be32	vendor_offset;
+	be32	vendor_length;
+	/* 256 bytes so far */
+	__u8	pad4[256];	/* 0xff */
+};
+
+/* type field */
+#define	DDF_HEADER_ANCHOR	0x00
+#define	DDF_HEADER_PRIMARY	0x01
+#define	DDF_HEADER_SECONDARY	0x02
+
+/* The content of the 'controller section' - global scope */
+struct ddf_controller_data {
+	be32	magic;			/* DDF_CONTROLLER_MAGIC */
+	be32	crc;
+	char	guid[DDF_GUID_LEN];
+	struct controller_type {
+		be16 vendor_id;
+		be16 device_id;
+		be16 sub_vendor_id;
+		be16 sub_device_id;
+	} type;
+	char	product_id[16];
+	__u8	pad[8];	/* 0xff */
+	__u8	vendor_data[448];
+};
+
+/* The content of phys_section - global scope */
+struct phys_disk {
+	be32	magic;		/* DDF_PHYS_RECORDS_MAGIC */
+	be32	crc;
+	be16	used_pdes;	/* This is a counter, not a max - the list
+				 * of used entries may not be dense */
+	be16	max_pdes;
+	__u8	pad[52];
+	struct phys_disk_entry {
+		char	guid[DDF_GUID_LEN];
+		be32	refnum;
+		be16	type;
+		be16	state;
+		be64	config_size;	/* DDF structures must be after here */
+		char	path[18];	/* Another horrible structure really
+					 * but is "used for information
+					 * purposes only" */
+		__u8	pad[6];
+	} entries[0];
+};
+
+/* phys_disk_entry.type is a bitmap - bigendian remember */
+#define	DDF_Forced_PD_GUID		1
+#define	DDF_Active_in_VD		2
+#define	DDF_Global_Spare		4 /* VD_CONF records are ignored */
+#define	DDF_Spare			8 /* overrides Global_spare */
+#define	DDF_Foreign			16
+#define	DDF_Legacy			32 /* no DDF on this device */
+
+#define	DDF_Interface_mask		0xf00
+#define	DDF_Interface_SCSI		0x100
+#define	DDF_Interface_SAS		0x200
+#define	DDF_Interface_SATA		0x300
+#define	DDF_Interface_FC		0x400
+
+/* phys_disk_entry.state is a bigendian bitmap */
+#define	DDF_Online			1
+#define	DDF_Failed			2 /* overrides  1,4,8 */
+#define	DDF_Rebuilding			4
+#define	DDF_Transition			8
+#define	DDF_SMART			16
+#define	DDF_ReadErrors			32
+#define	DDF_Missing			64
+
+/* The content of the virt_section global scope */
+struct virtual_disk {
+	be32	magic;		/* DDF_VIRT_RECORDS_MAGIC */
+	be32	crc;
+	be16	populated_vdes;
+	be16	max_vdes;
+	__u8	pad[52];
+	struct virtual_entry {
+		char	guid[DDF_GUID_LEN];
+		be16	unit;
+		__u16	pad0;	/* 0xffff */
+		be16	guid_crc;
+		be16	type;
+		__u8	state;
+		__u8	init_state;
+		__u8	pad1[14];
+		char	name[16];
+	} entries[0];
+};
+
+/* virtual_entry.type is a bitmap - bigendian */
+#define	DDF_Shared		1
+#define	DDF_Enforce_Groups	2
+#define	DDF_Unicode		4
+#define	DDF_Owner_Valid		8
+
+/* virtual_entry.state is a bigendian bitmap */
+#define	DDF_state_mask		0x7
+#define	DDF_state_optimal	0x0
+#define	DDF_state_degraded	0x1
+#define	DDF_state_deleted	0x2
+#define	DDF_state_missing	0x3
+#define	DDF_state_failed	0x4
+#define	DDF_state_part_optimal	0x5
+
+#define	DDF_state_morphing	0x8
+#define	DDF_state_inconsistent	0x10
+
+/* virtual_entry.init_state is a bigendian bitmap */
+#define	DDF_initstate_mask	0x03
+#define	DDF_init_not		0x00
+#define	DDF_init_quick		0x01 /* initialisation is progress.
+				      * i.e. 'state_inconsistent' */
+#define	DDF_init_full		0x02
+
+#define	DDF_access_mask		0xc0
+#define	DDF_access_rw		0x00
+#define	DDF_access_ro		0x80
+#define	DDF_access_blocked	0xc0
+
+/* The content of the config_section - local scope
+ * It has multiple records each config_record_len sectors
+ * They can be vd_config or spare_assign
+ */
+
+struct vd_config {
+	be32	magic;		/* DDF_VD_CONF_MAGIC */
+	be32	crc;
+	char	guid[DDF_GUID_LEN];
+	be32	timestamp;
+	be32	seqnum;
+	__u8	pad0[24];
+	be16	prim_elmnt_count;
+	__u8	chunk_shift;	/* 0 == 512, 1==1024 etc */
+	__u8	prl;
+	__u8	rlq;
+	__u8	sec_elmnt_count;
+	__u8	sec_elmnt_seq;
+	__u8	srl;
+	be64	blocks;		/* blocks per component could be different
+				 * on different component devices...(only
+				 * for concat I hope) */
+	be64	array_blocks;	/* blocks in array */
+	__u8	pad1[8];
+	be32	spare_refs[8];	/* This is used to detect missing spares.
+				 * As we don't have an interface for that
+				 * the values are ignored.
+				 */
+	__u8	cache_pol[8];
+	__u8	bg_rate;
+	__u8	pad2[3];
+	__u8	pad3[52];
+	__u8	pad4[192];
+	__u8	v0[32];	/* reserved- 0xff */
+	__u8	v1[32];	/* reserved- 0xff */
+	__u8	v2[16];	/* reserved- 0xff */
+	__u8	v3[16];	/* reserved- 0xff */
+	__u8	vendor[32];
+	be32	phys_refnum[0];	/* refnum of each disk in sequence */
+      /*__u64	lba_offset[0];  LBA offset in each phys.  Note extents in a
+				bvd are always the same size */
+};
+#define LBA_OFFSET(ddf, vd) ((be64 *) &(vd)->phys_refnum[(ddf)->mppe])
+
+/* vd_config.cache_pol[7] is a bitmap */
+#define	DDF_cache_writeback	1	/* else writethrough */
+#define	DDF_cache_wadaptive	2	/* only applies if writeback */
+#define	DDF_cache_readahead	4
+#define	DDF_cache_radaptive	8	/* only if doing read-ahead */
+#define	DDF_cache_ifnobatt	16	/* even to write cache if battery is poor */
+#define	DDF_cache_wallowed	32	/* enable write caching */
+#define	DDF_cache_rallowed	64	/* enable read caching */
+
+struct spare_assign {
+	be32	magic;		/* DDF_SPARE_ASSIGN_MAGIC */
+	be32	crc;
+	be32	timestamp;
+	__u8	reserved[7];
+	__u8	type;
+	be16	populated;	/* SAEs used */
+	be16	max;		/* max SAEs */
+	__u8	pad[8];
+	struct spare_assign_entry {
+		char	guid[DDF_GUID_LEN];
+		be16	secondary_element;
+		__u8	pad[6];
+	} spare_ents[0];
+};
+/* spare_assign.type is a bitmap */
+#define	DDF_spare_dedicated	0x1	/* else global */
+#define	DDF_spare_revertible	0x2	/* else committable */
+#define	DDF_spare_active	0x4	/* else not active */
+#define	DDF_spare_affinity	0x8	/* enclosure affinity */
+
+/* The data_section contents - local scope */
+struct disk_data {
+	be32	magic;		/* DDF_PHYS_DATA_MAGIC */
+	be32	crc;
+	char	guid[DDF_GUID_LEN];
+	be32	refnum;		/* crc of some magic drive data ... */
+	__u8	forced_ref;	/* set when above was not result of magic */
+	__u8	forced_guid;	/* set if guid was forced rather than magic */
+	__u8	vendor[32];
+	__u8	pad[442];
+};
+
+/* bbm_section content */
+struct bad_block_log {
+	be32	magic;
+	be32	crc;
+	be16	entry_count;
+	be32	spare_count;
+	__u8	pad[10];
+	be64	first_spare;
+	struct mapped_block {
+		be64	defective_start;
+		be32	replacement_start;
+		be16	remap_count;
+		__u8	pad[2];
+	} entries[0];
+};
+
+/* Struct for internally holding ddf structures */
+/* The DDF structure stored on each device is potentially
+ * quite different, as some data is global and some is local.
+ * The global data is:
+ *   - ddf header
+ *   - controller_data
+ *   - Physical disk records
+ *   - Virtual disk records
+ * The local data is:
+ *   - Configuration records
+ *   - Physical Disk data section
+ *  (  and Bad block and vendor which I don't care about yet).
+ *
+ * The local data is parsed into separate lists as it is read
+ * and reconstructed for writing.  This means that we only need
+ * to make config changes once and they are automatically
+ * propagated to all devices.
+ * The global (config and disk data) records are each in a list
+ * of separate data structures.  When writing we find the entry
+ * or entries applicable to the particular device.
+ */
+struct ddf_super {
+	struct ddf_header	anchor, primary, secondary;
+	struct ddf_controller_data controller;
+	struct ddf_header	*active;
+	struct phys_disk	*phys;
+	struct virtual_disk	*virt;
+	char			*conf;
+	int			pdsize, vdsize;
+	unsigned int		max_part, mppe, conf_rec_len;
+	int			currentdev;
+	int			updates_pending;
+	struct vcl {
+		union {
+			char space[512];
+			struct {
+				struct vcl	*next;
+				unsigned int	vcnum; /* index into ->virt */
+				/* For an array with a secondary level there are
+				 * multiple vd_config structures, all with the same
+				 * guid but with different sec_elmnt_seq.
+				 * One of these structures is in 'conf' below.
+				 * The others are in other_bvds, not in any
+				 * particular order.
+				 */
+				struct vd_config **other_bvds;
+				__u64		*block_sizes; /* NULL if all the same */
+			};
+		};
+		struct vd_config conf;
+	} *conflist, *currentconf;
+	struct dl {
+		union {
+			char space[512];
+			struct {
+				struct dl	*next;
+				int major, minor;
+				char *devname;
+				int fd;
+				unsigned long long size; /* sectors */
+				be64 primary_lba; /* sectors */
+				be64 secondary_lba; /* sectors */
+				be64 workspace_lba; /* sectors */
+				int pdnum;	/* index in ->phys */
+				struct spare_assign *spare;
+				void *mdupdate; /* hold metadata update */
+
+				/* These fields used by auto-layout */
+				int raiddisk; /* slot to fill in autolayout */
+				__u64 esize;
+				int displayed;
+			};
+		};
+		struct disk_data disk;
+		struct vcl *vlist[0]; /* max_part in size */
+	} *dlist, *add_list;
+};
+
+#ifndef MDASSEMBLE
+static int load_super_ddf_all(struct supertype *st, int fd,
+			      void **sbp, char *devname);
+static int get_svd_state(const struct ddf_super *, const struct vcl *);
+static int
+validate_geometry_ddf_container(struct supertype *st,
+				int level, int layout, int raiddisks,
+				int chunk, unsigned long long size,
+				unsigned long long data_offset,
+				char *dev, unsigned long long *freesize,
+				int verbose);
+
+static int validate_geometry_ddf_bvd(struct supertype *st,
+				     int level, int layout, int raiddisks,
+				     int *chunk, unsigned long long size,
+				     unsigned long long data_offset,
+				     char *dev, unsigned long long *freesize,
+				     int verbose);
+#endif
+
+static void free_super_ddf(struct supertype *st);
+static int all_ff(const char *guid);
+static unsigned int get_pd_index_from_refnum(const struct vcl *vc,
+					     be32 refnum, unsigned int nmax,
+					     const struct vd_config **bvd,
+					     unsigned int *idx);
+static void getinfo_super_ddf(struct supertype *st, struct mdinfo *info, char *map);
+static void uuid_from_ddf_guid(const char *guid, int uuid[4]);
+static void uuid_from_super_ddf(struct supertype *st, int uuid[4]);
+static void _ddf_array_name(char *name, const struct ddf_super *ddf, int i);
+static void getinfo_super_ddf_bvd(struct supertype *st, struct mdinfo *info, char *map);
+static int init_super_ddf_bvd(struct supertype *st,
+			      mdu_array_info_t *info,
+			      unsigned long long size,
+			      char *name, char *homehost,
+			      int *uuid, unsigned long long data_offset);
+
+#if DEBUG
+static void pr_state(struct ddf_super *ddf, const char *msg)
+{
+	unsigned int i;
+	dprintf("%s/%s: ", __func__, msg);
+	for (i = 0; i < be16_to_cpu(ddf->active->max_vd_entries); i++) {
+		if (all_ff(ddf->virt->entries[i].guid))
+			continue;
+		dprintf("%u(s=%02x i=%02x) ", i,
+			ddf->virt->entries[i].state,
+			ddf->virt->entries[i].init_state);
+	}
+	dprintf("\n");
+}
+#else
+static void pr_state(const struct ddf_super *ddf, const char *msg) {}
+#endif
+
+static void _ddf_set_updates_pending(struct ddf_super *ddf, struct vd_config *vc,
+				     const char *func)
+{
+	if (vc) {
+		vc->timestamp = cpu_to_be32(time(0)-DECADE);
+		vc->seqnum = cpu_to_be32(be32_to_cpu(vc->seqnum) + 1);
+	}
+	if (ddf->updates_pending)
+		return;
+	ddf->updates_pending = 1;
+	ddf->active->seq = cpu_to_be32((be32_to_cpu(ddf->active->seq)+1));
+	pr_state(ddf, func);
+}
+
+#define ddf_set_updates_pending(x,v) _ddf_set_updates_pending((x), (v), __func__)
+
+static be32 calc_crc(void *buf, int len)
+{
+	/* crcs are always at the same place as in the ddf_header */
+	struct ddf_header *ddf = buf;
+	be32 oldcrc = ddf->crc;
+	__u32 newcrc;
+	ddf->crc = cpu_to_be32(0xffffffff);
+
+	newcrc = crc32(0, buf, len);
+	ddf->crc = oldcrc;
+	/* The crc is stored (like everything) bigendian, so convert
+	 * here for simplicity
+	 */
+	return cpu_to_be32(newcrc);
+}
+
+#define DDF_INVALID_LEVEL 0xff
+#define DDF_NO_SECONDARY 0xff
+static int err_bad_md_layout(const mdu_array_info_t *array)
+{
+	pr_err("RAID%d layout %x with %d disks is unsupported for DDF\n",
+	       array->level, array->layout, array->raid_disks);
+	return -1;
+}
+
+static int layout_md2ddf(const mdu_array_info_t *array,
+			 struct vd_config *conf)
+{
+	be16 prim_elmnt_count = cpu_to_be16(array->raid_disks);
+	__u8 prl = DDF_INVALID_LEVEL, rlq = 0;
+	__u8 sec_elmnt_count = 1;
+	__u8 srl = DDF_NO_SECONDARY;
+
+	switch (array->level) {
+	case LEVEL_LINEAR:
+		prl = DDF_CONCAT;
+		break;
+	case 0:
+		rlq = DDF_RAID0_SIMPLE;
+		prl = DDF_RAID0;
+		break;
+	case 1:
+		switch (array->raid_disks) {
+		case 2:
+			rlq = DDF_RAID1_SIMPLE;
+			break;
+		case 3:
+			rlq = DDF_RAID1_MULTI;
+			break;
+		default:
+			return err_bad_md_layout(array);
+		}
+		prl = DDF_RAID1;
+		break;
+	case 4:
+		if (array->layout != 0)
+			return err_bad_md_layout(array);
+		rlq = DDF_RAID4_N;
+		prl = DDF_RAID4;
+		break;
+	case 5:
+		switch (array->layout) {
+		case ALGORITHM_LEFT_ASYMMETRIC:
+			rlq = DDF_RAID5_N_RESTART;
+			break;
+		case ALGORITHM_RIGHT_ASYMMETRIC:
+			rlq = DDF_RAID5_0_RESTART;
+			break;
+		case ALGORITHM_LEFT_SYMMETRIC:
+			rlq = DDF_RAID5_N_CONTINUE;
+			break;
+		case ALGORITHM_RIGHT_SYMMETRIC:
+			/* not mentioned in standard */
+		default:
+			return err_bad_md_layout(array);
+		}
+		prl = DDF_RAID5;
+		break;
+	case 6:
+		switch (array->layout) {
+		case ALGORITHM_ROTATING_N_RESTART:
+			rlq = DDF_RAID5_N_RESTART;
+			break;
+		case ALGORITHM_ROTATING_ZERO_RESTART:
+			rlq = DDF_RAID6_0_RESTART;
+			break;
+		case ALGORITHM_ROTATING_N_CONTINUE:
+			rlq = DDF_RAID5_N_CONTINUE;
+			break;
+		default:
+			return err_bad_md_layout(array);
+		}
+		prl = DDF_RAID6;
+		break;
+	case 10:
+		if (array->raid_disks % 2 == 0 && array->layout == 0x102) {
+			rlq = DDF_RAID1_SIMPLE;
+			prim_elmnt_count =  cpu_to_be16(2);
+			sec_elmnt_count = array->raid_disks / 2;
+			srl = DDF_2SPANNED;
+			prl = DDF_RAID1;
+		} else if (array->raid_disks % 3 == 0
+			   && array->layout == 0x103) {
+			rlq = DDF_RAID1_MULTI;
+			prim_elmnt_count =  cpu_to_be16(3);
+			sec_elmnt_count = array->raid_disks / 3;
+			srl = DDF_2SPANNED;
+			prl = DDF_RAID1;
+		} else if (array->layout == 0x201) {
+			prl = DDF_RAID1E;
+			rlq = DDF_RAID1E_OFFSET;
+		} else if (array->layout == 0x102) {
+			prl = DDF_RAID1E;
+			rlq = DDF_RAID1E_ADJACENT;
+		} else
+			return err_bad_md_layout(array);
+		break;
+	default:
+		return err_bad_md_layout(array);
+	}
+	conf->prl = prl;
+	conf->prim_elmnt_count = prim_elmnt_count;
+	conf->rlq = rlq;
+	conf->srl = srl;
+	conf->sec_elmnt_count = sec_elmnt_count;
+	return 0;
+}
+
+static int err_bad_ddf_layout(const struct vd_config *conf)
+{
+	pr_err("DDF RAID %u qualifier %u with %u disks is unsupported\n",
+	       conf->prl, conf->rlq, be16_to_cpu(conf->prim_elmnt_count));
+	return -1;
+}
+
+static int layout_ddf2md(const struct vd_config *conf,
+			 mdu_array_info_t *array)
+{
+	int level = LEVEL_UNSUPPORTED;
+	int layout = 0;
+	int raiddisks = be16_to_cpu(conf->prim_elmnt_count);
+
+	if (conf->sec_elmnt_count > 1) {
+		/* see also check_secondary() */
+		if (conf->prl != DDF_RAID1 ||
+		    (conf->srl != DDF_2STRIPED && conf->srl != DDF_2SPANNED)) {
+			pr_err("Unsupported secondary RAID level %u/%u\n",
+			       conf->prl, conf->srl);
+			return -1;
+		}
+		if (raiddisks == 2 && conf->rlq == DDF_RAID1_SIMPLE)
+			layout = 0x102;
+		else if  (raiddisks == 3 && conf->rlq == DDF_RAID1_MULTI)
+			layout = 0x103;
+		else
+			return err_bad_ddf_layout(conf);
+		raiddisks *= conf->sec_elmnt_count;
+		level = 10;
+		goto good;
+	}
+
+	switch (conf->prl) {
+	case DDF_CONCAT:
+		level = LEVEL_LINEAR;
+		break;
+	case DDF_RAID0:
+		if (conf->rlq != DDF_RAID0_SIMPLE)
+			return err_bad_ddf_layout(conf);
+		level = 0;
+		break;
+	case DDF_RAID1:
+		if (!((conf->rlq == DDF_RAID1_SIMPLE && raiddisks == 2) ||
+		      (conf->rlq == DDF_RAID1_MULTI && raiddisks == 3)))
+			return err_bad_ddf_layout(conf);
+		level = 1;
+		break;
+	case DDF_RAID1E:
+		if (conf->rlq == DDF_RAID1E_ADJACENT)
+			layout = 0x102;
+		else if (conf->rlq == DDF_RAID1E_OFFSET)
+			layout = 0x201;
+		else
+			return err_bad_ddf_layout(conf);
+		level = 10;
+		break;
+	case DDF_RAID4:
+		if (conf->rlq != DDF_RAID4_N)
+			return err_bad_ddf_layout(conf);
+		level = 4;
+		break;
+	case DDF_RAID5:
+		switch (conf->rlq) {
+		case DDF_RAID5_N_RESTART:
+			layout = ALGORITHM_LEFT_ASYMMETRIC;
+			break;
+		case DDF_RAID5_0_RESTART:
+			layout = ALGORITHM_RIGHT_ASYMMETRIC;
+			break;
+		case DDF_RAID5_N_CONTINUE:
+			layout = ALGORITHM_LEFT_SYMMETRIC;
+			break;
+		default:
+			return err_bad_ddf_layout(conf);
+		}
+		level = 5;
+		break;
+	case DDF_RAID6:
+		switch (conf->rlq) {
+		case DDF_RAID5_N_RESTART:
+			layout = ALGORITHM_ROTATING_N_RESTART;
+			break;
+		case DDF_RAID6_0_RESTART:
+			layout = ALGORITHM_ROTATING_ZERO_RESTART;
+			break;
+		case DDF_RAID5_N_CONTINUE:
+			layout = ALGORITHM_ROTATING_N_CONTINUE;
+			break;
+		default:
+			return err_bad_ddf_layout(conf);
+		}
+		level = 6;
+		break;
+	default:
+		return err_bad_ddf_layout(conf);
+	};
+
+good:
+	array->level = level;
+	array->layout = layout;
+	array->raid_disks = raiddisks;
+	return 0;
+}
+
+static int load_ddf_header(int fd, unsigned long long lba,
+			   unsigned long long size,
+			   int type,
+			   struct ddf_header *hdr, struct ddf_header *anchor)
+{
+	/* read a ddf header (primary or secondary) from fd/lba
+	 * and check that it is consistent with anchor
+	 * Need to check:
+	 *   magic, crc, guid, rev, and LBA's header_type, and
+	 *  everything after header_type must be the same
+	 */
+	if (lba >= size-1)
+		return 0;
+
+	if (lseek64(fd, lba<<9, 0) < 0)
+		return 0;
+
+	if (read(fd, hdr, 512) != 512)
+		return 0;
+
+	if (!be32_eq(hdr->magic, DDF_HEADER_MAGIC)) {
+		pr_err("%s: bad header magic\n", __func__);
+		return 0;
+	}
+	if (!be32_eq(calc_crc(hdr, 512), hdr->crc)) {
+		pr_err("%s: bad CRC\n", __func__);
+		return 0;
+	}
+	if (memcmp(anchor->guid, hdr->guid, DDF_GUID_LEN) != 0 ||
+	    memcmp(anchor->revision, hdr->revision, 8) != 0 ||
+	    !be64_eq(anchor->primary_lba, hdr->primary_lba) ||
+	    !be64_eq(anchor->secondary_lba, hdr->secondary_lba) ||
+	    hdr->type != type ||
+	    memcmp(anchor->pad2, hdr->pad2, 512 -
+		   offsetof(struct ddf_header, pad2)) != 0) {
+		pr_err("%s: header mismatch\n", __func__);
+		return 0;
+	}
+
+	/* Looks good enough to me... */
+	return 1;
+}
+
+static void *load_section(int fd, struct ddf_super *super, void *buf,
+			  be32 offset_be, be32 len_be, int check)
+{
+	unsigned long long offset = be32_to_cpu(offset_be);
+	unsigned long long len = be32_to_cpu(len_be);
+	int dofree = (buf == NULL);
+
+	if (check)
+		if (len != 2 && len != 8 && len != 32
+		    && len != 128 && len != 512)
+			return NULL;
+
+	if (len > 1024)
+		return NULL;
+	if (!buf && posix_memalign(&buf, 512, len<<9) != 0)
+		buf = NULL;
+
+	if (!buf)
+		return NULL;
+
+	if (super->active->type == 1)
+		offset += be64_to_cpu(super->active->primary_lba);
+	else
+		offset += be64_to_cpu(super->active->secondary_lba);
+
+	if ((unsigned long long)lseek64(fd, offset<<9, 0) != (offset<<9)) {
+		if (dofree)
+			free(buf);
+		return NULL;
+	}
+	if ((unsigned long long)read(fd, buf, len<<9) != (len<<9)) {
+		if (dofree)
+			free(buf);
+		return NULL;
+	}
+	return buf;
+}
+
+static int load_ddf_headers(int fd, struct ddf_super *super, char *devname)
+{
+	unsigned long long dsize;
+
+	get_dev_size(fd, NULL, &dsize);
+
+	if (lseek64(fd, dsize-512, 0) < 0) {
+		if (devname)
+			pr_err("Cannot seek to anchor block on %s: %s\n",
+			       devname, strerror(errno));
+		return 1;
+	}
+	if (read(fd, &super->anchor, 512) != 512) {
+		if (devname)
+			pr_err("Cannot read anchor block on %s: %s\n",
+			       devname, strerror(errno));
+		return 1;
+	}
+	if (!be32_eq(super->anchor.magic, DDF_HEADER_MAGIC)) {
+		if (devname)
+			pr_err("no DDF anchor found on %s\n",
+				devname);
+		return 2;
+	}
+	if (!be32_eq(calc_crc(&super->anchor, 512), super->anchor.crc)) {
+		if (devname)
+			pr_err("bad CRC on anchor on %s\n",
+				devname);
+		return 2;
+	}
+	if (memcmp(super->anchor.revision, DDF_REVISION_0, 8) != 0 &&
+	    memcmp(super->anchor.revision, DDF_REVISION_2, 8) != 0) {
+		if (devname)
+			pr_err("can only support super revision"
+				" %.8s and earlier, not %.8s on %s\n",
+				DDF_REVISION_2, super->anchor.revision,devname);
+		return 2;
+	}
+	super->active = NULL;
+	if (load_ddf_header(fd, be64_to_cpu(super->anchor.primary_lba),
+			    dsize >> 9,  1,
+			    &super->primary, &super->anchor) == 0) {
+		if (devname)
+			pr_err("Failed to load primary DDF header "
+			       "on %s\n", devname);
+	} else
+		super->active = &super->primary;
+
+	if (load_ddf_header(fd, be64_to_cpu(super->anchor.secondary_lba),
+			    dsize >> 9,  2,
+			    &super->secondary, &super->anchor)) {
+		if (super->active == NULL
+		    || (be32_to_cpu(super->primary.seq)
+			< be32_to_cpu(super->secondary.seq) &&
+			!super->secondary.openflag)
+		    || (be32_to_cpu(super->primary.seq)
+			== be32_to_cpu(super->secondary.seq) &&
+			super->primary.openflag && !super->secondary.openflag)
+			)
+			super->active = &super->secondary;
+	} else if (devname &&
+		   be64_to_cpu(super->anchor.secondary_lba) != ~(__u64)0)
+		pr_err("Failed to load secondary DDF header on %s\n",
+		       devname);
+	if (super->active == NULL)
+		return 2;
+	return 0;
+}
+
+static int load_ddf_global(int fd, struct ddf_super *super, char *devname)
+{
+	void *ok;
+	ok = load_section(fd, super, &super->controller,
+			  super->active->controller_section_offset,
+			  super->active->controller_section_length,
+			  0);
+	super->phys = load_section(fd, super, NULL,
+				   super->active->phys_section_offset,
+				   super->active->phys_section_length,
+				   1);
+	super->pdsize = be32_to_cpu(super->active->phys_section_length) * 512;
+
+	super->virt = load_section(fd, super, NULL,
+				   super->active->virt_section_offset,
+				   super->active->virt_section_length,
+				   1);
+	super->vdsize = be32_to_cpu(super->active->virt_section_length) * 512;
+	if (!ok ||
+	    !super->phys ||
+	    !super->virt) {
+		free(super->phys);
+		free(super->virt);
+		super->phys = NULL;
+		super->virt = NULL;
+		return 2;
+	}
+	super->conflist = NULL;
+	super->dlist = NULL;
+
+	super->max_part = be16_to_cpu(super->active->max_partitions);
+	super->mppe = be16_to_cpu(super->active->max_primary_element_entries);
+	super->conf_rec_len = be16_to_cpu(super->active->config_record_len);
+	return 0;
+}
+
+#define DDF_UNUSED_BVD 0xff
+static int alloc_other_bvds(const struct ddf_super *ddf, struct vcl *vcl)
+{
+	unsigned int n_vds = vcl->conf.sec_elmnt_count - 1;
+	unsigned int i, vdsize;
+	void *p;
+	if (n_vds == 0) {
+		vcl->other_bvds = NULL;
+		return 0;
+	}
+	vdsize = ddf->conf_rec_len * 512;
+	if (posix_memalign(&p, 512, n_vds *
+			   (vdsize +  sizeof(struct vd_config *))) != 0)
+		return -1;
+	vcl->other_bvds = (struct vd_config **) (p + n_vds * vdsize);
+	for (i = 0; i < n_vds; i++) {
+		vcl->other_bvds[i] = p + i * vdsize;
+		memset(vcl->other_bvds[i], 0, vdsize);
+		vcl->other_bvds[i]->sec_elmnt_seq = DDF_UNUSED_BVD;
+	}
+	return 0;
+}
+
+static void add_other_bvd(struct vcl *vcl, struct vd_config *vd,
+			  unsigned int len)
+{
+	int i;
+	for (i = 0; i < vcl->conf.sec_elmnt_count-1; i++)
+		if (vcl->other_bvds[i]->sec_elmnt_seq == vd->sec_elmnt_seq)
+			break;
+
+	if (i < vcl->conf.sec_elmnt_count-1) {
+		if (be32_to_cpu(vd->seqnum) <=
+		    be32_to_cpu(vcl->other_bvds[i]->seqnum))
+			return;
+	} else {
+		for (i = 0; i < vcl->conf.sec_elmnt_count-1; i++)
+			if (vcl->other_bvds[i]->sec_elmnt_seq == DDF_UNUSED_BVD)
+				break;
+		if (i == vcl->conf.sec_elmnt_count-1) {
+			pr_err("no space for sec level config %u, count is %u\n",
+			       vd->sec_elmnt_seq, vcl->conf.sec_elmnt_count);
+			return;
+		}
+	}
+	memcpy(vcl->other_bvds[i], vd, len);
+}
+
+static int load_ddf_local(int fd, struct ddf_super *super,
+			  char *devname, int keep)
+{
+	struct dl *dl;
+	struct stat stb;
+	char *conf;
+	unsigned int i;
+	unsigned int confsec;
+	int vnum;
+	unsigned int max_virt_disks =
+		be16_to_cpu(super->active->max_vd_entries);
+	unsigned long long dsize;
+
+	/* First the local disk info */
+	if (posix_memalign((void**)&dl, 512,
+			   sizeof(*dl) +
+			   (super->max_part) * sizeof(dl->vlist[0])) != 0) {
+		pr_err("%s could not allocate disk info buffer\n",
+		       __func__);
+		return 1;
+	}
+
+	load_section(fd, super, &dl->disk,
+		     super->active->data_section_offset,
+		     super->active->data_section_length,
+		     0);
+	dl->devname = devname ? xstrdup(devname) : NULL;
+
+	fstat(fd, &stb);
+	dl->major = major(stb.st_rdev);
+	dl->minor = minor(stb.st_rdev);
+	dl->next = super->dlist;
+	dl->fd = keep ? fd : -1;
+
+	dl->size = 0;
+	if (get_dev_size(fd, devname, &dsize))
+		dl->size = dsize >> 9;
+	/* If the disks have different sizes, the LBAs will differ
+	 * between phys disks.
+	 * At this point here, the values in super->active must be valid
+	 * for this phys disk. */
+	dl->primary_lba = super->active->primary_lba;
+	dl->secondary_lba = super->active->secondary_lba;
+	dl->workspace_lba = super->active->workspace_lba;
+	dl->spare = NULL;
+	for (i = 0 ; i < super->max_part ; i++)
+		dl->vlist[i] = NULL;
+	super->dlist = dl;
+	dl->pdnum = -1;
+	for (i = 0; i < be16_to_cpu(super->active->max_pd_entries); i++)
+		if (memcmp(super->phys->entries[i].guid,
+			   dl->disk.guid, DDF_GUID_LEN) == 0)
+			dl->pdnum = i;
+
+	/* Now the config list. */
+	/* 'conf' is an array of config entries, some of which are
+	 * probably invalid.  Those which are good need to be copied into
+	 * the conflist
+	 */
+
+	conf = load_section(fd, super, super->conf,
+			    super->active->config_section_offset,
+			    super->active->config_section_length,
+			    0);
+	super->conf = conf;
+	vnum = 0;
+	for (confsec = 0;
+	     confsec < be32_to_cpu(super->active->config_section_length);
+	     confsec += super->conf_rec_len) {
+		struct vd_config *vd =
+			(struct vd_config *)((char*)conf + confsec*512);
+		struct vcl *vcl;
+
+		if (be32_eq(vd->magic, DDF_SPARE_ASSIGN_MAGIC)) {
+			if (dl->spare)
+				continue;
+			if (posix_memalign((void**)&dl->spare, 512,
+					   super->conf_rec_len*512) != 0) {
+				pr_err("%s could not allocate spare info buf\n",
+				       __func__);
+				return 1;
+			}
+
+			memcpy(dl->spare, vd, super->conf_rec_len*512);
+			continue;
+		}
+		if (!be32_eq(vd->magic, DDF_VD_CONF_MAGIC))
+			/* Must be vendor-unique - I cannot handle those */
+			continue;
+
+		for (vcl = super->conflist; vcl; vcl = vcl->next) {
+			if (memcmp(vcl->conf.guid,
+				   vd->guid, DDF_GUID_LEN) == 0)
+				break;
+		}
+
+		if (vcl) {
+			dl->vlist[vnum++] = vcl;
+			if (vcl->other_bvds != NULL &&
+			    vcl->conf.sec_elmnt_seq != vd->sec_elmnt_seq) {
+				add_other_bvd(vcl, vd, super->conf_rec_len*512);
+				continue;
+			}
+			if (be32_to_cpu(vd->seqnum) <=
+			    be32_to_cpu(vcl->conf.seqnum))
+				continue;
+		} else {
+			if (posix_memalign((void**)&vcl, 512,
+					   (super->conf_rec_len*512 +
+					    offsetof(struct vcl, conf))) != 0) {
+				pr_err("%s could not allocate vcl buf\n",
+				       __func__);
+				return 1;
+			}
+			vcl->next = super->conflist;
+			vcl->block_sizes = NULL; /* FIXME not for CONCAT */
+			vcl->conf.sec_elmnt_count = vd->sec_elmnt_count;
+			if (alloc_other_bvds(super, vcl) != 0) {
+				pr_err("%s could not allocate other bvds\n",
+				       __func__);
+				free(vcl);
+				return 1;
+			};
+			super->conflist = vcl;
+			dl->vlist[vnum++] = vcl;
+		}
+		memcpy(&vcl->conf, vd, super->conf_rec_len*512);
+		for (i=0; i < max_virt_disks ; i++)
+			if (memcmp(super->virt->entries[i].guid,
+				   vcl->conf.guid, DDF_GUID_LEN)==0)
+				break;
+		if (i < max_virt_disks)
+			vcl->vcnum = i;
+	}
+
+	return 0;
+}
+
+static int load_super_ddf(struct supertype *st, int fd,
+			  char *devname)
+{
+	unsigned long long dsize;
+	struct ddf_super *super;
+	int rv;
+
+	if (get_dev_size(fd, devname, &dsize) == 0)
+		return 1;
+
+	if (test_partition(fd))
+		/* DDF is not allowed on partitions */
+		return 1;
+
+	/* 32M is a lower bound */
+	if (dsize <= 32*1024*1024) {
+		if (devname)
+			pr_err("%s is too small for ddf: "
+			       "size is %llu sectors.\n",
+			       devname, dsize>>9);
+		return 1;
+	}
+	if (dsize & 511) {
+		if (devname)
+			pr_err("%s is an odd size for ddf: "
+			       "size is %llu bytes.\n",
+			       devname, dsize);
+		return 1;
+	}
+
+	free_super_ddf(st);
+
+	if (posix_memalign((void**)&super, 512, sizeof(*super))!= 0) {
+		pr_err("malloc of %zu failed.\n",
+			sizeof(*super));
+		return 1;
+	}
+	memset(super, 0, sizeof(*super));
+
+	rv = load_ddf_headers(fd, super, devname);
+	if (rv) {
+		free(super);
+		return rv;
+	}
+
+	/* Have valid headers and have chosen the best. Let's read in the rest*/
+
+	rv = load_ddf_global(fd, super, devname);
+
+	if (rv) {
+		if (devname)
+			pr_err("Failed to load all information "
+			       "sections on %s\n", devname);
+		free(super);
+		return rv;
+	}
+
+	rv = load_ddf_local(fd, super, devname, 0);
+
+	if (rv) {
+		if (devname)
+			pr_err("Failed to load all information "
+			       "sections on %s\n", devname);
+		free(super);
+		return rv;
+	}
+
+	/* Should possibly check the sections .... */
+
+	st->sb = super;
+	if (st->ss == NULL) {
+		st->ss = &super_ddf;
+		st->minor_version = 0;
+		st->max_devs = 512;
+	}
+	return 0;
+
+}
+
+static void free_super_ddf(struct supertype *st)
+{
+	struct ddf_super *ddf = st->sb;
+	if (ddf == NULL)
+		return;
+	free(ddf->phys);
+	free(ddf->virt);
+	free(ddf->conf);
+	while (ddf->conflist) {
+		struct vcl *v = ddf->conflist;
+		ddf->conflist = v->next;
+		if (v->block_sizes)
+			free(v->block_sizes);
+		if (v->other_bvds)
+			/*
+			   v->other_bvds[0] points to beginning of buffer,
+			   see alloc_other_bvds()
+			*/
+			free(v->other_bvds[0]);
+		free(v);
+	}
+	while (ddf->dlist) {
+		struct dl *d = ddf->dlist;
+		ddf->dlist = d->next;
+		if (d->fd >= 0)
+			close(d->fd);
+		if (d->spare)
+			free(d->spare);
+		free(d);
+	}
+	while (ddf->add_list) {
+		struct dl *d = ddf->add_list;
+		ddf->add_list = d->next;
+		if (d->fd >= 0)
+			close(d->fd);
+		if (d->spare)
+			free(d->spare);
+		free(d);
+	}
+	free(ddf);
+	st->sb = NULL;
+}
+
+static struct supertype *match_metadata_desc_ddf(char *arg)
+{
+	/* 'ddf' only supports containers */
+	struct supertype *st;
+	if (strcmp(arg, "ddf") != 0 &&
+	    strcmp(arg, "default") != 0
+		)
+		return NULL;
+
+	st = xcalloc(1, sizeof(*st));
+	st->ss = &super_ddf;
+	st->max_devs = 512;
+	st->minor_version = 0;
+	st->sb = NULL;
+	return st;
+}
+
+#ifndef MDASSEMBLE
+
+static mapping_t ddf_state[] = {
+	{ "Optimal", 0},
+	{ "Degraded", 1},
+	{ "Deleted", 2},
+	{ "Missing", 3},
+	{ "Failed", 4},
+	{ "Partially Optimal", 5},
+	{ "-reserved-", 6},
+	{ "-reserved-", 7},
+	{ NULL, 0}
+};
+
+static mapping_t ddf_init_state[] = {
+	{ "Not Initialised", 0},
+	{ "QuickInit in Progress", 1},
+	{ "Fully Initialised", 2},
+	{ "*UNKNOWN*", 3},
+	{ NULL, 0}
+};
+static mapping_t ddf_access[] = {
+	{ "Read/Write", 0},
+	{ "Reserved", 1},
+	{ "Read Only", 2},
+	{ "Blocked (no access)", 3},
+	{ NULL ,0}
+};
+
+static mapping_t ddf_level[] = {
+	{ "RAID0", DDF_RAID0},
+	{ "RAID1", DDF_RAID1},
+	{ "RAID3", DDF_RAID3},
+	{ "RAID4", DDF_RAID4},
+	{ "RAID5", DDF_RAID5},
+	{ "RAID1E",DDF_RAID1E},
+	{ "JBOD",  DDF_JBOD},
+	{ "CONCAT",DDF_CONCAT},
+	{ "RAID5E",DDF_RAID5E},
+	{ "RAID5EE",DDF_RAID5EE},
+	{ "RAID6", DDF_RAID6},
+	{ NULL, 0}
+};
+static mapping_t ddf_sec_level[] = {
+	{ "Striped", DDF_2STRIPED},
+	{ "Mirrored", DDF_2MIRRORED},
+	{ "Concat", DDF_2CONCAT},
+	{ "Spanned", DDF_2SPANNED},
+	{ NULL, 0}
+};
+#endif
+
+static int all_ff(const char *guid)
+{
+	int i;
+	for (i = 0; i < DDF_GUID_LEN; i++)
+		if (guid[i] != (char)0xff)
+			return 0;
+	return 1;
+}
+
+static const char *guid_str(const char *guid)
+{
+	static char buf[DDF_GUID_LEN*2+1];
+	int i;
+	char *p = buf;
+	for (i = 0; i < DDF_GUID_LEN; i++) {
+		unsigned char c = guid[i];
+		if (c >= 32 && c < 127)
+			p += sprintf(p, "%c", c);
+		else
+			p += sprintf(p, "%02x", c);
+	}
+	*p = '\0';
+	return (const char *) buf;
+}
+
+#ifndef MDASSEMBLE
+static void print_guid(char *guid, int tstamp)
+{
+	/* A GUIDs are part (or all) ASCII and part binary.
+	 * They tend to be space padded.
+	 * We print the GUID in HEX, then in parentheses add
+	 * any initial ASCII sequence, and a possible
+	 * time stamp from bytes 16-19
+	 */
+	int l = DDF_GUID_LEN;
+	int i;
+
+	for (i=0 ; i<DDF_GUID_LEN ; i++) {
+		if ((i&3)==0 && i != 0) printf(":");
+		printf("%02X", guid[i]&255);
+	}
+
+	printf("\n                  (");
+	while (l && guid[l-1] == ' ')
+		l--;
+	for (i=0 ; i<l ; i++) {
+		if (guid[i] >= 0x20 && guid[i] < 0x7f)
+			fputc(guid[i], stdout);
+		else
+			break;
+	}
+	if (tstamp) {
+		time_t then = __be32_to_cpu(*(__u32*)(guid+16)) + DECADE;
+		char tbuf[100];
+		struct tm *tm;
+		tm = localtime(&then);
+		strftime(tbuf, 100, " %D %T",tm);
+		fputs(tbuf, stdout);
+	}
+	printf(")");
+}
+
+static void examine_vd(int n, struct ddf_super *sb, char *guid)
+{
+	int crl = sb->conf_rec_len;
+	struct vcl *vcl;
+
+	for (vcl = sb->conflist ; vcl ; vcl = vcl->next) {
+		unsigned int i;
+		struct vd_config *vc = &vcl->conf;
+
+		if (!be32_eq(calc_crc(vc, crl*512), vc->crc))
+			continue;
+		if (memcmp(vc->guid, guid, DDF_GUID_LEN) != 0)
+			continue;
+
+		/* Ok, we know about this VD, let's give more details */
+		printf(" Raid Devices[%d] : %d (", n,
+		       be16_to_cpu(vc->prim_elmnt_count));
+		for (i = 0; i < be16_to_cpu(vc->prim_elmnt_count); i++) {
+			int j;
+			int cnt = be16_to_cpu(sb->phys->max_pdes);
+			for (j=0; j<cnt; j++)
+				if (be32_eq(vc->phys_refnum[i],
+					    sb->phys->entries[j].refnum))
+					break;
+			if (i) printf(" ");
+			if (j < cnt)
+				printf("%d", j);
+			else
+				printf("--");
+			printf("@%lluK", (unsigned long long) be64_to_cpu(LBA_OFFSET(sb, vc)[i])/2);
+		}
+		printf(")\n");
+		if (vc->chunk_shift != 255)
+			printf("   Chunk Size[%d] : %d sectors\n", n,
+			       1 << vc->chunk_shift);
+		printf("   Raid Level[%d] : %s\n", n,
+		       map_num(ddf_level, vc->prl)?:"-unknown-");
+		if (vc->sec_elmnt_count != 1) {
+			printf("  Secondary Position[%d] : %d of %d\n", n,
+			       vc->sec_elmnt_seq, vc->sec_elmnt_count);
+			printf("  Secondary Level[%d] : %s\n", n,
+			       map_num(ddf_sec_level, vc->srl) ?: "-unknown-");
+		}
+		printf("  Device Size[%d] : %llu\n", n,
+		       be64_to_cpu(vc->blocks)/2);
+		printf("   Array Size[%d] : %llu\n", n,
+		       be64_to_cpu(vc->array_blocks)/2);
+	}
+}
+
+static void examine_vds(struct ddf_super *sb)
+{
+	int cnt = be16_to_cpu(sb->virt->populated_vdes);
+	unsigned int i;
+	printf("  Virtual Disks : %d\n", cnt);
+
+	for (i = 0; i < be16_to_cpu(sb->virt->max_vdes); i++) {
+		struct virtual_entry *ve = &sb->virt->entries[i];
+		if (all_ff(ve->guid))
+			continue;
+		printf("\n");
+		printf("      VD GUID[%d] : ", i); print_guid(ve->guid, 1);
+		printf("\n");
+		printf("         unit[%d] : %d\n", i, be16_to_cpu(ve->unit));
+		printf("        state[%d] : %s, %s%s\n", i,
+		       map_num(ddf_state, ve->state & 7),
+		       (ve->state & DDF_state_morphing) ? "Morphing, ": "",
+		       (ve->state & DDF_state_inconsistent)? "Not Consistent" : "Consistent");
+		printf("   init state[%d] : %s\n", i,
+		       map_num(ddf_init_state, ve->init_state&DDF_initstate_mask));
+		printf("       access[%d] : %s\n", i,
+		       map_num(ddf_access, (ve->init_state & DDF_access_mask) >> 6));
+		printf("         Name[%d] : %.16s\n", i, ve->name);
+		examine_vd(i, sb, ve->guid);
+	}
+	if (cnt) printf("\n");
+}
+
+static void examine_pds(struct ddf_super *sb)
+{
+	int cnt = be16_to_cpu(sb->phys->max_pdes);
+	int i;
+	struct dl *dl;
+	int unlisted = 0;
+	printf(" Physical Disks : %d\n", cnt);
+	printf("      Number    RefNo      Size       Device      Type/State\n");
+
+	for (dl = sb->dlist; dl; dl = dl->next)
+		dl->displayed = 0;
+
+	for (i=0 ; i<cnt ; i++) {
+		struct phys_disk_entry *pd = &sb->phys->entries[i];
+		int type = be16_to_cpu(pd->type);
+		int state = be16_to_cpu(pd->state);
+
+		if (be32_to_cpu(pd->refnum) == 0xffffffff)
+			/* Not in use */
+			continue;
+		//printf("      PD GUID[%d] : ", i); print_guid(pd->guid, 0);
+		//printf("\n");
+		printf("       %3d    %08x  ", i,
+		       be32_to_cpu(pd->refnum));
+		printf("%8lluK ",
+		       be64_to_cpu(pd->config_size)>>1);
+		for (dl = sb->dlist; dl ; dl = dl->next) {
+			if (be32_eq(dl->disk.refnum, pd->refnum)) {
+				char *dv = map_dev(dl->major, dl->minor, 0);
+				if (dv) {
+					printf("%-15s", dv);
+					break;
+				}
+			}
+		}
+		if (!dl)
+			printf("%15s","");
+		else
+			dl->displayed = 1;
+		printf(" %s%s%s%s%s",
+		       (type&2) ? "active":"",
+		       (type&4) ? "Global-Spare":"",
+		       (type&8) ? "spare" : "",
+		       (type&16)? ", foreign" : "",
+		       (type&32)? "pass-through" : "");
+		if (state & DDF_Failed)
+			/* This over-rides these three */
+			state &= ~(DDF_Online|DDF_Rebuilding|DDF_Transition);
+		printf("/%s%s%s%s%s%s%s",
+		       (state&1)? "Online": "Offline",
+		       (state&2)? ", Failed": "",
+		       (state&4)? ", Rebuilding": "",
+		       (state&8)? ", in-transition": "",
+		       (state&16)? ", SMART-errors": "",
+		       (state&32)? ", Unrecovered-Read-Errors": "",
+		       (state&64)? ", Missing" : "");
+		printf("\n");
+	}
+	for (dl = sb->dlist; dl; dl = dl->next) {
+		char *dv;
+		if (dl->displayed)
+			continue;
+		if (!unlisted)
+			printf(" Physical disks not in metadata!:\n");
+		unlisted = 1;
+		dv = map_dev(dl->major, dl->minor, 0);
+		printf("   %08x %s\n", be32_to_cpu(dl->disk.refnum),
+		       dv ? dv : "-unknown-");
+	}
+	if (unlisted)
+		printf("\n");
+}
+
+static void examine_super_ddf(struct supertype *st, char *homehost)
+{
+	struct ddf_super *sb = st->sb;
+
+	printf("          Magic : %08x\n", be32_to_cpu(sb->anchor.magic));
+	printf("        Version : %.8s\n", sb->anchor.revision);
+	printf("Controller GUID : "); print_guid(sb->controller.guid, 0);
+	printf("\n");
+	printf(" Container GUID : "); print_guid(sb->anchor.guid, 1);
+	printf("\n");
+	printf("            Seq : %08x\n", be32_to_cpu(sb->active->seq));
+	printf("  Redundant hdr : %s\n", (be32_eq(sb->secondary.magic,
+						 DDF_HEADER_MAGIC)
+					  ?"yes" : "no"));
+	examine_vds(sb);
+	examine_pds(sb);
+}
+
+static unsigned int get_vd_num_of_subarray(struct supertype *st)
+{
+	/*
+	 * Figure out the VD number for this supertype.
+	 * Returns DDF_CONTAINER for the container itself,
+	 * and DDF_NOTFOUND on error.
+	 */
+	struct ddf_super *ddf = st->sb;
+	struct mdinfo *sra;
+	char *sub, *end;
+	unsigned int vcnum;
+
+	if (*st->container_devnm == '\0')
+		return DDF_CONTAINER;
+
+	sra = sysfs_read(-1, st->devnm, GET_VERSION);
+	if (!sra || sra->array.major_version != -1 ||
+	    sra->array.minor_version != -2 ||
+	    !is_subarray(sra->text_version))
+		return DDF_NOTFOUND;
+
+	sub = strchr(sra->text_version + 1, '/');
+	if (sub != NULL)
+		vcnum = strtoul(sub + 1, &end, 10);
+	if (sub == NULL || *sub == '\0' || *end != '\0' ||
+	    vcnum >= be16_to_cpu(ddf->active->max_vd_entries))
+		return DDF_NOTFOUND;
+
+	return vcnum;
+}
+
+static void brief_examine_super_ddf(struct supertype *st, int verbose)
+{
+	/* We just write a generic DDF ARRAY entry
+	 */
+	struct mdinfo info;
+	char nbuf[64];
+	getinfo_super_ddf(st, &info, NULL);
+	fname_from_uuid(st, &info, nbuf, ':');
+
+	printf("ARRAY metadata=ddf UUID=%s\n", nbuf + 5);
+}
+
+static void brief_examine_subarrays_ddf(struct supertype *st, int verbose)
+{
+	/* We write a DDF ARRAY member entry for each vd, identifying container
+	 * by uuid and member by unit number and uuid.
+	 */
+	struct ddf_super *ddf = st->sb;
+	struct mdinfo info;
+	unsigned int i;
+	char nbuf[64];
+	getinfo_super_ddf(st, &info, NULL);
+	fname_from_uuid(st, &info, nbuf, ':');
+
+	for (i = 0; i < be16_to_cpu(ddf->virt->max_vdes); i++) {
+		struct virtual_entry *ve = &ddf->virt->entries[i];
+		struct vcl vcl;
+		char nbuf1[64];
+		char namebuf[17];
+		if (all_ff(ve->guid))
+			continue;
+		memcpy(vcl.conf.guid, ve->guid, DDF_GUID_LEN);
+		ddf->currentconf =&vcl;
+		vcl.vcnum = i;
+		uuid_from_super_ddf(st, info.uuid);
+		fname_from_uuid(st, &info, nbuf1, ':');
+		_ddf_array_name(namebuf, ddf, i);
+		printf("ARRAY%s%s container=%s member=%d UUID=%s\n",
+		       namebuf[0] == '\0' ? "" : " /dev/md/", namebuf,
+		       nbuf+5, i, nbuf1+5);
+	}
+}
+
+static void export_examine_super_ddf(struct supertype *st)
+{
+	struct mdinfo info;
+	char nbuf[64];
+	getinfo_super_ddf(st, &info, NULL);
+	fname_from_uuid(st, &info, nbuf, ':');
+	printf("MD_METADATA=ddf\n");
+	printf("MD_LEVEL=container\n");
+	printf("MD_UUID=%s\n", nbuf+5);
+	printf("MD_DEVICES=%u\n",
+		be16_to_cpu(((struct ddf_super *)st->sb)->phys->used_pdes));
+}
+
+static int copy_metadata_ddf(struct supertype *st, int from, int to)
+{
+	void *buf;
+	unsigned long long dsize, offset;
+	int bytes;
+	struct ddf_header *ddf;
+	int written = 0;
+
+	/* The meta consists of an anchor, a primary, and a secondary.
+	 * This all lives at the end of the device.
+	 * So it is easiest to find the earliest of primary and
+	 * secondary, and copy everything from there.
+	 *
+	 * Anchor is 512 from end.  It contains primary_lba and secondary_lba
+	 * we choose one of those
+	 */
+
+	if (posix_memalign(&buf, 4096, 4096) != 0)
+		return 1;
+
+	if (!get_dev_size(from, NULL, &dsize))
+		goto err;
+
+	if (lseek64(from, dsize-512, 0) < 0)
+		goto err;
+	if (read(from, buf, 512) != 512)
+		goto err;
+	ddf = buf;
+	if (!be32_eq(ddf->magic, DDF_HEADER_MAGIC) ||
+	    !be32_eq(calc_crc(ddf, 512), ddf->crc) ||
+	    (memcmp(ddf->revision, DDF_REVISION_0, 8) != 0 &&
+	     memcmp(ddf->revision, DDF_REVISION_2, 8) != 0))
+		goto err;
+
+	offset = dsize - 512;
+	if ((be64_to_cpu(ddf->primary_lba) << 9) < offset)
+		offset = be64_to_cpu(ddf->primary_lba) << 9;
+	if ((be64_to_cpu(ddf->secondary_lba) << 9) < offset)
+		offset = be64_to_cpu(ddf->secondary_lba) << 9;
+
+	bytes = dsize - offset;
+
+	if (lseek64(from, offset, 0) < 0 ||
+	    lseek64(to, offset, 0) < 0)
+		goto err;
+	while (written < bytes) {
+		int n = bytes - written;
+		if (n > 4096)
+			n = 4096;
+		if (read(from, buf, n) != n)
+			goto err;
+		if (write(to, buf, n) != n)
+			goto err;
+		written += n;
+	}
+	free(buf);
+	return 0;
+err:
+	free(buf);
+	return 1;
+}
+
+static void detail_super_ddf(struct supertype *st, char *homehost)
+{
+	struct ddf_super *sb = st->sb;
+	int cnt = be16_to_cpu(sb->virt->populated_vdes);
+
+	printf(" Container GUID : "); print_guid(sb->anchor.guid, 1);
+	printf("\n");
+	printf("            Seq : %08x\n", be32_to_cpu(sb->active->seq));
+	printf("  Virtual Disks : %d\n", cnt);
+	printf("\n");
+}
+#endif
+
+static const char *vendors_with_variable_volume_UUID[] = {
+	"LSI      ",
+};
+
+static int volume_id_is_reliable(const struct ddf_super *ddf)
+{
+	int n = ARRAY_SIZE(vendors_with_variable_volume_UUID);
+	int i;
+	for (i = 0; i < n; i++)
+		if (!memcmp(ddf->controller.guid,
+			vendors_with_variable_volume_UUID[i], 8))
+		return 0;
+	return 1;
+}
+
+static void uuid_of_ddf_subarray(const struct ddf_super *ddf,
+				 unsigned int vcnum, int uuid[4])
+{
+	char buf[DDF_GUID_LEN+18], sha[20], *p;
+	struct sha1_ctx ctx;
+	if (volume_id_is_reliable(ddf)) {
+		uuid_from_ddf_guid(ddf->virt->entries[vcnum].guid, uuid);
+		return;
+	}
+	/*
+	 * Some fake RAID BIOSes (in particular, LSI ones) change the
+	 * VD GUID at every boot. These GUIDs are not suitable for
+	 * identifying an array. Luckily the header GUID appears to
+	 * remain constant.
+	 * We construct a pseudo-UUID from the header GUID and those
+	 * properties of the subarray that we expect to remain constant.
+	 */
+	memset(buf, 0, sizeof(buf));
+	p = buf;
+	memcpy(p, ddf->anchor.guid, DDF_GUID_LEN);
+	p += DDF_GUID_LEN;
+	memcpy(p, ddf->virt->entries[vcnum].name, 16);
+	p += 16;
+	*((__u16 *) p) = vcnum;
+	sha1_init_ctx(&ctx);
+	sha1_process_bytes(buf, sizeof(buf), &ctx);
+	sha1_finish_ctx(&ctx, sha);
+	memcpy(uuid, sha, 4*4);
+}
+
+#ifndef MDASSEMBLE
+static void brief_detail_super_ddf(struct supertype *st)
+{
+	struct mdinfo info;
+	char nbuf[64];
+	struct ddf_super *ddf = st->sb;
+	unsigned int vcnum = get_vd_num_of_subarray(st);
+	if (vcnum == DDF_CONTAINER)
+		uuid_from_super_ddf(st, info.uuid);
+	else if (vcnum == DDF_NOTFOUND)
+		return;
+	else
+		uuid_of_ddf_subarray(ddf, vcnum, info.uuid);
+	fname_from_uuid(st, &info, nbuf,':');
+	printf(" UUID=%s", nbuf + 5);
+}
+#endif
+
+static int match_home_ddf(struct supertype *st, char *homehost)
+{
+	/* It matches 'this' host if the controller is a
+	 * Linux-MD controller with vendor_data matching
+	 * the hostname.  It would be nice if we could
+	 * test against controller found in /sys or somewhere...
+	 */
+	struct ddf_super *ddf = st->sb;
+	unsigned int len;
+
+	if (!homehost)
+		return 0;
+	len = strlen(homehost);
+
+	return (memcmp(ddf->controller.guid, T10, 8) == 0 &&
+		len < sizeof(ddf->controller.vendor_data) &&
+		memcmp(ddf->controller.vendor_data, homehost,len) == 0 &&
+		ddf->controller.vendor_data[len] == 0);
+}
+
+#ifndef MDASSEMBLE
+static int find_index_in_bvd(const struct ddf_super *ddf,
+			     const struct vd_config *conf, unsigned int n,
+			     unsigned int *n_bvd)
+{
+	/*
+	 * Find the index of the n-th valid physical disk in this BVD.
+	 * Unused entries can be sprinkled in with the used entries,
+	 * but don't count.
+	 */
+	unsigned int i, j;
+	for (i = 0, j = 0;
+	     i < ddf->mppe && j < be16_to_cpu(conf->prim_elmnt_count);
+	     i++) {
+		if (be32_to_cpu(conf->phys_refnum[i]) != 0xffffffff) {
+			if (n == j) {
+				*n_bvd = i;
+				return 1;
+			}
+			j++;
+		}
+	}
+	dprintf("%s: couldn't find BVD member %u (total %u)\n",
+		__func__, n, be16_to_cpu(conf->prim_elmnt_count));
+	return 0;
+}
+
+/* Given a member array instance number, and a raid disk within that instance,
+ * find the vd_config structure.  The offset of the given disk in the phys_refnum
+ * table is returned in n_bvd.
+ * For two-level members with a secondary raid level the vd_config for
+ * the appropriate BVD is returned.
+ * The return value is always &vlc->conf, where vlc is returned in last pointer.
+ */
+static struct vd_config *find_vdcr(struct ddf_super *ddf, unsigned int inst,
+				   unsigned int n,
+				   unsigned int *n_bvd, struct vcl **vcl)
+{
+	struct vcl *v;
+
+	for (v = ddf->conflist; v; v = v->next) {
+		unsigned int nsec, ibvd = 0;
+		struct vd_config *conf;
+		if (inst != v->vcnum)
+			continue;
+		conf = &v->conf;
+		if (conf->sec_elmnt_count == 1) {
+			if (find_index_in_bvd(ddf, conf, n, n_bvd)) {
+				*vcl = v;
+				return conf;
+			} else
+				goto bad;
+		}
+		if (v->other_bvds == NULL) {
+			pr_err("%s: BUG: other_bvds is NULL, nsec=%u\n",
+			       __func__, conf->sec_elmnt_count);
+			goto bad;
+		}
+		nsec = n / be16_to_cpu(conf->prim_elmnt_count);
+		if (conf->sec_elmnt_seq != nsec) {
+			for (ibvd = 1; ibvd < conf->sec_elmnt_count; ibvd++) {
+				if (v->other_bvds[ibvd-1]->sec_elmnt_seq
+				    == nsec)
+					break;
+			}
+			if (ibvd == conf->sec_elmnt_count)
+				goto bad;
+			conf = v->other_bvds[ibvd-1];
+		}
+		if (!find_index_in_bvd(ddf, conf,
+				       n - nsec*conf->sec_elmnt_count, n_bvd))
+			goto bad;
+		dprintf("%s: found disk %u as member %u in bvd %d of array %u\n"
+			, __func__, n, *n_bvd, ibvd, inst);
+		*vcl = v;
+		return conf;
+	}
+bad:
+	pr_err("%s: Could't find disk %d in array %u\n", __func__, n, inst);
+	return NULL;
+}
+#endif
+
+static int find_phys(const struct ddf_super *ddf, be32 phys_refnum)
+{
+	/* Find the entry in phys_disk which has the given refnum
+	 * and return it's index
+	 */
+	unsigned int i;
+	for (i = 0; i < be16_to_cpu(ddf->phys->max_pdes); i++)
+		if (be32_eq(ddf->phys->entries[i].refnum, phys_refnum))
+			return i;
+	return -1;
+}
+
+static void uuid_from_ddf_guid(const char *guid, int uuid[4])
+{
+	char buf[20];
+	struct sha1_ctx ctx;
+	sha1_init_ctx(&ctx);
+	sha1_process_bytes(guid, DDF_GUID_LEN, &ctx);
+	sha1_finish_ctx(&ctx, buf);
+	memcpy(uuid, buf, 4*4);
+}
+
+static void uuid_from_super_ddf(struct supertype *st, int uuid[4])
+{
+	/* The uuid returned here is used for:
+	 *  uuid to put into bitmap file (Create, Grow)
+	 *  uuid for backup header when saving critical section (Grow)
+	 *  comparing uuids when re-adding a device into an array
+	 *    In these cases the uuid required is that of the data-array,
+	 *    not the device-set.
+	 *  uuid to recognise same set when adding a missing device back
+	 *    to an array.   This is a uuid for the device-set.
+	 *
+	 * For each of these we can make do with a truncated
+	 * or hashed uuid rather than the original, as long as
+	 * everyone agrees.
+	 * In the case of SVD we assume the BVD is of interest,
+	 * though that might be the case if a bitmap were made for
+	 * a mirrored SVD - worry about that later.
+	 * So we need to find the VD configuration record for the
+	 * relevant BVD and extract the GUID and Secondary_Element_Seq.
+	 * The first 16 bytes of the sha1 of these is used.
+	 */
+	struct ddf_super *ddf = st->sb;
+	struct vcl *vcl = ddf->currentconf;
+
+	if (vcl)
+		uuid_of_ddf_subarray(ddf, vcl->vcnum, uuid);
+	else
+		uuid_from_ddf_guid(ddf->anchor.guid, uuid);
+}
+
+static void getinfo_super_ddf(struct supertype *st, struct mdinfo *info, char *map)
+{
+	struct ddf_super *ddf = st->sb;
+	int map_disks = info->array.raid_disks;
+	__u32 *cptr;
+
+	if (ddf->currentconf) {
+		getinfo_super_ddf_bvd(st, info, map);
+		return;
+	}
+	memset(info, 0, sizeof(*info));
+
+	info->array.raid_disks    = be16_to_cpu(ddf->phys->used_pdes);
+	info->array.level	  = LEVEL_CONTAINER;
+	info->array.layout	  = 0;
+	info->array.md_minor	  = -1;
+	cptr = (__u32 *)(ddf->anchor.guid + 16);
+	info->array.ctime	  = DECADE + __be32_to_cpu(*cptr);
+
+	info->array.chunk_size	  = 0;
+	info->container_enough	  = 1;
+
+	info->disk.major	  = 0;
+	info->disk.minor	  = 0;
+	if (ddf->dlist) {
+		struct phys_disk_entry *pde = NULL;
+		info->disk.number = be32_to_cpu(ddf->dlist->disk.refnum);
+		info->disk.raid_disk = find_phys(ddf, ddf->dlist->disk.refnum);
+
+		info->data_offset = be64_to_cpu(ddf->phys->
+						  entries[info->disk.raid_disk].
+						  config_size);
+		info->component_size = ddf->dlist->size - info->data_offset;
+		if (info->disk.raid_disk >= 0)
+			pde = ddf->phys->entries + info->disk.raid_disk;
+		if (pde &&
+		    !(be16_to_cpu(pde->state) & DDF_Failed) &&
+		    !(be16_to_cpu(pde->state) & DDF_Missing))
+			info->disk.state = (1 << MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE);
+		else
+			info->disk.state = 1 << MD_DISK_FAULTY;
+
+	} else {
+		/* There should always be a dlist, but just in case...*/
+		info->disk.number = -1;
+		info->disk.raid_disk = -1;
+		info->disk.state = (1 << MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE);
+	}
+	info->events = be32_to_cpu(ddf->active->seq);
+	info->array.utime = DECADE + be32_to_cpu(ddf->active->timestamp);
+
+	info->recovery_start = MaxSector;
+	info->reshape_active = 0;
+	info->recovery_blocked = 0;
+	info->name[0] = 0;
+
+	info->array.major_version = -1;
+	info->array.minor_version = -2;
+	strcpy(info->text_version, "ddf");
+	info->safe_mode_delay = 0;
+
+	uuid_from_super_ddf(st, info->uuid);
+
+	if (map) {
+		int i, e = 0;
+		int max = be16_to_cpu(ddf->phys->max_pdes);
+		for (i = e = 0 ; i < map_disks ; i++, e++) {
+			while (e < max &&
+			       be32_to_cpu(ddf->phys->entries[e].refnum) == 0xffffffff)
+				e++;
+			if (i < info->array.raid_disks && e < max &&
+			    !(be16_to_cpu(ddf->phys->entries[e].state)
+			      & DDF_Failed))
+				map[i] = 1;
+			else
+				map[i] = 0;
+		}
+	}
+}
+
+/* size of name must be at least 17 bytes! */
+static void _ddf_array_name(char *name, const struct ddf_super *ddf, int i)
+{
+	int j;
+	memcpy(name, ddf->virt->entries[i].name, 16);
+	name[16] = 0;
+	for(j = 0; j < 16; j++)
+		if (name[j] == ' ')
+			name[j] = 0;
+}
+
+static void getinfo_super_ddf_bvd(struct supertype *st, struct mdinfo *info, char *map)
+{
+	struct ddf_super *ddf = st->sb;
+	struct vcl *vc = ddf->currentconf;
+	int cd = ddf->currentdev;
+	int n_prim;
+	int j;
+	struct dl *dl = NULL;
+	int map_disks = info->array.raid_disks;
+	__u32 *cptr;
+	struct vd_config *conf;
+
+	memset(info, 0, sizeof(*info));
+	if (layout_ddf2md(&vc->conf, &info->array) == -1)
+		return;
+	info->array.md_minor	  = -1;
+	cptr = (__u32 *)(vc->conf.guid + 16);
+	info->array.ctime	  = DECADE + __be32_to_cpu(*cptr);
+	info->array.utime	  = DECADE + be32_to_cpu(vc->conf.timestamp);
+	info->array.chunk_size	  = 512 << vc->conf.chunk_shift;
+	info->custom_array_size	  = be64_to_cpu(vc->conf.array_blocks);
+
+	conf = &vc->conf;
+	n_prim = be16_to_cpu(conf->prim_elmnt_count);
+	if (conf->sec_elmnt_count > 1 && cd >= n_prim) {
+		int ibvd = cd / n_prim - 1;
+		cd %= n_prim;
+		conf = vc->other_bvds[ibvd];
+	}
+
+	if (cd >= 0 && (unsigned)cd < ddf->mppe) {
+		info->data_offset =
+			be64_to_cpu(LBA_OFFSET(ddf, conf)[cd]);
+		if (vc->block_sizes)
+			info->component_size = vc->block_sizes[cd];
+		else
+			info->component_size = be64_to_cpu(conf->blocks);
+
+		for (dl = ddf->dlist; dl ; dl = dl->next)
+			if (be32_eq(dl->disk.refnum, conf->phys_refnum[cd]))
+				break;
+	}
+
+	info->disk.major = 0;
+	info->disk.minor = 0;
+	info->disk.state = 0;
+	if (dl && dl->pdnum >= 0) {
+		info->disk.major = dl->major;
+		info->disk.minor = dl->minor;
+		info->disk.raid_disk = cd + conf->sec_elmnt_seq
+			* be16_to_cpu(conf->prim_elmnt_count);
+		info->disk.number = dl->pdnum;
+		info->disk.state = 0;
+		if (info->disk.number >= 0 &&
+		    (be16_to_cpu(ddf->phys->entries[info->disk.number].state) & DDF_Online) &&
+		    !(be16_to_cpu(ddf->phys->entries[info->disk.number].state) & DDF_Failed))
+			info->disk.state = (1<<MD_DISK_SYNC)|(1<<MD_DISK_ACTIVE);
+		info->events = be32_to_cpu(ddf->active->seq);
+	}
+
+	info->container_member = ddf->currentconf->vcnum;
+
+	info->recovery_start = MaxSector;
+	info->resync_start = 0;
+	info->reshape_active = 0;
+	info->recovery_blocked = 0;
+	if (!(ddf->virt->entries[info->container_member].state
+	      & DDF_state_inconsistent)  &&
+	    (ddf->virt->entries[info->container_member].init_state
+	     & DDF_initstate_mask)
+	    == DDF_init_full)
+		info->resync_start = MaxSector;
+
+	uuid_from_super_ddf(st, info->uuid);
+
+	info->array.major_version = -1;
+	info->array.minor_version = -2;
+	sprintf(info->text_version, "/%s/%d",
+		st->container_devnm,
+		info->container_member);
+	info->safe_mode_delay = DDF_SAFE_MODE_DELAY;
+
+	_ddf_array_name(info->name, ddf, info->container_member);
+
+	if (map)
+		for (j = 0; j < map_disks; j++) {
+			map[j] = 0;
+			if (j <  info->array.raid_disks) {
+				int i = find_phys(ddf, vc->conf.phys_refnum[j]);
+				if (i >= 0 &&
+				    (be16_to_cpu(ddf->phys->entries[i].state)
+				     & DDF_Online) &&
+				    !(be16_to_cpu(ddf->phys->entries[i].state)
+				      & DDF_Failed))
+					map[i] = 1;
+			}
+		}
+}
+
+static int update_super_ddf(struct supertype *st, struct mdinfo *info,
+			    char *update,
+			    char *devname, int verbose,
+			    int uuid_set, char *homehost)
+{
+	/* For 'assemble' and 'force' we need to return non-zero if any
+	 * change was made.  For others, the return value is ignored.
+	 * Update options are:
+	 *  force-one : This device looks a bit old but needs to be included,
+	 *        update age info appropriately.
+	 *  assemble: clear any 'faulty' flag to allow this device to
+	 *		be assembled.
+	 *  force-array: Array is degraded but being forced, mark it clean
+	 *	   if that will be needed to assemble it.
+	 *
+	 *  newdev:  not used ????
+	 *  grow:  Array has gained a new device - this is currently for
+	 *		linear only
+	 *  resync: mark as dirty so a resync will happen.
+	 *  uuid:  Change the uuid of the array to match what is given
+	 *  homehost:  update the recorded homehost
+	 *  name:  update the name - preserving the homehost
+	 *  _reshape_progress: record new reshape_progress position.
+	 *
+	 * Following are not relevant for this version:
+	 *  sparc2.2 : update from old dodgey metadata
+	 *  super-minor: change the preferred_minor number
+	 *  summaries:  update redundant counters.
+	 */
+	int rv = 0;
+//	struct ddf_super *ddf = st->sb;
+//	struct vd_config *vd = find_vdcr(ddf, info->container_member);
+//	struct virtual_entry *ve = find_ve(ddf);
+
+	/* we don't need to handle "force-*" or "assemble" as
+	 * there is no need to 'trick' the kernel.  When the metadata is
+	 * first updated to activate the array, all the implied modifications
+	 * will just happen.
+	 */
+
+	if (strcmp(update, "grow") == 0) {
+		/* FIXME */
+	} else if (strcmp(update, "resync") == 0) {
+//		info->resync_checkpoint = 0;
+	} else if (strcmp(update, "homehost") == 0) {
+		/* homehost is stored in controller->vendor_data,
+		 * or it is when we are the vendor
+		 */
+//		if (info->vendor_is_local)
+//			strcpy(ddf->controller.vendor_data, homehost);
+		rv = -1;
+	} else if (strcmp(update, "name") == 0) {
+		/* name is stored in virtual_entry->name */
+//		memset(ve->name, ' ', 16);
+//		strncpy(ve->name, info->name, 16);
+		rv = -1;
+	} else if (strcmp(update, "_reshape_progress") == 0) {
+		/* We don't support reshape yet */
+	} else if (strcmp(update, "assemble") == 0 ) {
+		/* Do nothing, just succeed */
+		rv = 0;
+	} else
+		rv = -1;
+
+//	update_all_csum(ddf);
+
+	return rv;
+}
+
+static void make_header_guid(char *guid)
+{
+	be32 stamp;
+	/* Create a DDF Header of Virtual Disk GUID */
+
+	/* 24 bytes of fiction required.
+	 * first 8 are a 'vendor-id'  - "Linux-MD"
+	 * next 8 are controller type.. how about 0X DEAD BEEF 0000 0000
+	 * Remaining 8 random number plus timestamp
+	 */
+	memcpy(guid, T10, sizeof(T10));
+	stamp = cpu_to_be32(0xdeadbeef);
+	memcpy(guid+8, &stamp, 4);
+	stamp = cpu_to_be32(0);
+	memcpy(guid+12, &stamp, 4);
+	stamp = cpu_to_be32(time(0) - DECADE);
+	memcpy(guid+16, &stamp, 4);
+	stamp._v32 = random32();
+	memcpy(guid+20, &stamp, 4);
+}
+
+static unsigned int find_unused_vde(const struct ddf_super *ddf)
+{
+	unsigned int i;
+	for (i = 0; i < be16_to_cpu(ddf->virt->max_vdes); i++) {
+		if (all_ff(ddf->virt->entries[i].guid))
+			return i;
+	}
+	return DDF_NOTFOUND;
+}
+
+static unsigned int find_vde_by_name(const struct ddf_super *ddf,
+				     const char *name)
+{
+	unsigned int i;
+	if (name == NULL)
+		return DDF_NOTFOUND;
+	for (i = 0; i < be16_to_cpu(ddf->virt->max_vdes); i++) {
+		if (all_ff(ddf->virt->entries[i].guid))
+			continue;
+		if (!strncmp(name, ddf->virt->entries[i].name,
+			     sizeof(ddf->virt->entries[i].name)))
+			return i;
+	}
+	return DDF_NOTFOUND;
+}
+
+#ifndef MDASSEMBLE
+static unsigned int find_vde_by_guid(const struct ddf_super *ddf,
+				     const char *guid)
+{
+	unsigned int i;
+	if (guid == NULL || all_ff(guid))
+		return DDF_NOTFOUND;
+	for (i = 0; i < be16_to_cpu(ddf->virt->max_vdes); i++)
+		if (!memcmp(ddf->virt->entries[i].guid, guid, DDF_GUID_LEN))
+			return i;
+	return DDF_NOTFOUND;
+}
+#endif
+
+static int init_super_ddf(struct supertype *st,
+			  mdu_array_info_t *info,
+			  unsigned long long size, char *name, char *homehost,
+			  int *uuid, unsigned long long data_offset)
+{
+	/* This is primarily called by Create when creating a new array.
+	 * We will then get add_to_super called for each component, and then
+	 * write_init_super called to write it out to each device.
+	 * For DDF, Create can create on fresh devices or on a pre-existing
+	 * array.
+	 * To create on a pre-existing array a different method will be called.
+	 * This one is just for fresh drives.
+	 *
+	 * We need to create the entire 'ddf' structure which includes:
+	 *  DDF headers - these are easy.
+	 *  Controller data - a Sector describing this controller .. not that
+	 *		      this is a controller exactly.
+	 *  Physical Disk Record - one entry per device, so
+	 *			   leave plenty of space.
+	 *  Virtual Disk Records - again, just leave plenty of space.
+	 *			   This just lists VDs, doesn't give details.
+	 *  Config records - describe the VDs that use this disk
+	 *  DiskData  - describes 'this' device.
+	 *  BadBlockManagement - empty
+	 *  Diag Space - empty
+	 *  Vendor Logs - Could we put bitmaps here?
+	 *
+	 */
+	struct ddf_super *ddf;
+	char hostname[17];
+	int hostlen;
+	int max_phys_disks, max_virt_disks;
+	unsigned long long sector;
+	int clen;
+	int i;
+	int pdsize, vdsize;
+	struct phys_disk *pd;
+	struct virtual_disk *vd;
+
+	if (st->sb)
+		return init_super_ddf_bvd(st, info, size, name, homehost, uuid,
+					  data_offset);
+
+	if (posix_memalign((void**)&ddf, 512, sizeof(*ddf)) != 0) {
+		pr_err("%s could not allocate superblock\n", __func__);
+		return 0;
+	}
+	memset(ddf, 0, sizeof(*ddf));
+	st->sb = ddf;
+
+	if (info == NULL) {
+		/* zeroing superblock */
+		return 0;
+	}
+
+	/* At least 32MB *must* be reserved for the ddf.  So let's just
+	 * start 32MB from the end, and put the primary header there.
+	 * Don't do secondary for now.
+	 * We don't know exactly where that will be yet as it could be
+	 * different on each device.  So just set up the lengths.
+	 */
+
+	ddf->anchor.magic = DDF_HEADER_MAGIC;
+	make_header_guid(ddf->anchor.guid);
+
+	memcpy(ddf->anchor.revision, DDF_REVISION_2, 8);
+	ddf->anchor.seq = cpu_to_be32(1);
+	ddf->anchor.timestamp = cpu_to_be32(time(0) - DECADE);
+	ddf->anchor.openflag = 0xFF;
+	ddf->anchor.foreignflag = 0;
+	ddf->anchor.enforcegroups = 0; /* Is this best?? */
+	ddf->anchor.pad0 = 0xff;
+	memset(ddf->anchor.pad1, 0xff, 12);
+	memset(ddf->anchor.header_ext, 0xff, 32);
+	ddf->anchor.primary_lba = cpu_to_be64(~(__u64)0);
+	ddf->anchor.secondary_lba = cpu_to_be64(~(__u64)0);
+	ddf->anchor.type = DDF_HEADER_ANCHOR;
+	memset(ddf->anchor.pad2, 0xff, 3);
+	ddf->anchor.workspace_len = cpu_to_be32(32768); /* Must be reserved */
+	/* Put this at bottom of 32M reserved.. */
+	ddf->anchor.workspace_lba = cpu_to_be64(~(__u64)0);
+	max_phys_disks = 1023;   /* Should be enough, 4095 is also allowed */
+	ddf->anchor.max_pd_entries = cpu_to_be16(max_phys_disks);
+	max_virt_disks = 255; /* 15, 63, 255, 1024, 4095 are all allowed */
+	ddf->anchor.max_vd_entries = cpu_to_be16(max_virt_disks);
+	ddf->max_part = 64;
+	ddf->anchor.max_partitions = cpu_to_be16(ddf->max_part);
+	ddf->mppe = 256; /* 16, 64, 256, 1024, 4096 are all allowed */
+	ddf->conf_rec_len = 1 + ROUND_UP(ddf->mppe * (4+8), 512)/512;
+	ddf->anchor.config_record_len = cpu_to_be16(ddf->conf_rec_len);
+	ddf->anchor.max_primary_element_entries = cpu_to_be16(ddf->mppe);
+	memset(ddf->anchor.pad3, 0xff, 54);
+	/* Controller section is one sector long immediately
+	 * after the ddf header */
+	sector = 1;
+	ddf->anchor.controller_section_offset = cpu_to_be32(sector);
+	ddf->anchor.controller_section_length = cpu_to_be32(1);
+	sector += 1;
+
+	/* phys is 8 sectors after that */
+	pdsize = ROUND_UP(sizeof(struct phys_disk) +
+			  sizeof(struct phys_disk_entry)*max_phys_disks,
+			  512);
+	switch(pdsize/512) {
+	case 2: case 8: case 32: case 128: case 512: break;
+	default: abort();
+	}
+	ddf->anchor.phys_section_offset = cpu_to_be32(sector);
+	ddf->anchor.phys_section_length =
+		cpu_to_be32(pdsize/512); /* max_primary_element_entries/8 */
+	sector += pdsize/512;
+
+	/* virt is another 32 sectors */
+	vdsize = ROUND_UP(sizeof(struct virtual_disk) +
+			  sizeof(struct virtual_entry) * max_virt_disks,
+			  512);
+	switch(vdsize/512) {
+	case 2: case 8: case 32: case 128: case 512: break;
+	default: abort();
+	}
+	ddf->anchor.virt_section_offset = cpu_to_be32(sector);
+	ddf->anchor.virt_section_length =
+		cpu_to_be32(vdsize/512); /* max_vd_entries/8 */
+	sector += vdsize/512;
+
+	clen = ddf->conf_rec_len * (ddf->max_part+1);
+	ddf->anchor.config_section_offset = cpu_to_be32(sector);
+	ddf->anchor.config_section_length = cpu_to_be32(clen);
+	sector += clen;
+
+	ddf->anchor.data_section_offset = cpu_to_be32(sector);
+	ddf->anchor.data_section_length = cpu_to_be32(1);
+	sector += 1;
+
+	ddf->anchor.bbm_section_length = cpu_to_be32(0);
+	ddf->anchor.bbm_section_offset = cpu_to_be32(0xFFFFFFFF);
+	ddf->anchor.diag_space_length = cpu_to_be32(0);
+	ddf->anchor.diag_space_offset = cpu_to_be32(0xFFFFFFFF);
+	ddf->anchor.vendor_length = cpu_to_be32(0);
+	ddf->anchor.vendor_offset = cpu_to_be32(0xFFFFFFFF);
+
+	memset(ddf->anchor.pad4, 0xff, 256);
+
+	memcpy(&ddf->primary, &ddf->anchor, 512);
+	memcpy(&ddf->secondary, &ddf->anchor, 512);
+
+	ddf->primary.openflag = 1; /* I guess.. */
+	ddf->primary.type = DDF_HEADER_PRIMARY;
+
+	ddf->secondary.openflag = 1; /* I guess.. */
+	ddf->secondary.type = DDF_HEADER_SECONDARY;
+
+	ddf->active = &ddf->primary;
+
+	ddf->controller.magic = DDF_CONTROLLER_MAGIC;
+
+	/* 24 more bytes of fiction required.
+	 * first 8 are a 'vendor-id'  - "Linux-MD"
+	 * Remaining 16 are serial number.... maybe a hostname would do?
+	 */
+	memcpy(ddf->controller.guid, T10, sizeof(T10));
+	gethostname(hostname, sizeof(hostname));
+	hostname[sizeof(hostname) - 1] = 0;
+	hostlen = strlen(hostname);
+	memcpy(ddf->controller.guid + 24 - hostlen, hostname, hostlen);
+	for (i = strlen(T10) ; i+hostlen < 24; i++)
+		ddf->controller.guid[i] = ' ';
+
+	ddf->controller.type.vendor_id = cpu_to_be16(0xDEAD);
+	ddf->controller.type.device_id = cpu_to_be16(0xBEEF);
+	ddf->controller.type.sub_vendor_id = cpu_to_be16(0);
+	ddf->controller.type.sub_device_id = cpu_to_be16(0);
+	memcpy(ddf->controller.product_id, "What Is My PID??", 16);
+	memset(ddf->controller.pad, 0xff, 8);
+	memset(ddf->controller.vendor_data, 0xff, 448);
+	if (homehost && strlen(homehost) < 440)
+		strcpy((char*)ddf->controller.vendor_data, homehost);
+
+	if (posix_memalign((void**)&pd, 512, pdsize) != 0) {
+		pr_err("%s could not allocate pd\n", __func__);
+		return 0;
+	}
+	ddf->phys = pd;
+	ddf->pdsize = pdsize;
+
+	memset(pd, 0xff, pdsize);
+	memset(pd, 0, sizeof(*pd));
+	pd->magic = DDF_PHYS_RECORDS_MAGIC;
+	pd->used_pdes = cpu_to_be16(0);
+	pd->max_pdes = cpu_to_be16(max_phys_disks);
+	memset(pd->pad, 0xff, 52);
+	for (i = 0; i < max_phys_disks; i++)
+		memset(pd->entries[i].guid, 0xff, DDF_GUID_LEN);
+
+	if (posix_memalign((void**)&vd, 512, vdsize) != 0) {
+		pr_err("%s could not allocate vd\n", __func__);
+		return 0;
+	}
+	ddf->virt = vd;
+	ddf->vdsize = vdsize;
+	memset(vd, 0, vdsize);
+	vd->magic = DDF_VIRT_RECORDS_MAGIC;
+	vd->populated_vdes = cpu_to_be16(0);
+	vd->max_vdes = cpu_to_be16(max_virt_disks);
+	memset(vd->pad, 0xff, 52);
+
+	for (i=0; i<max_virt_disks; i++)
+		memset(&vd->entries[i], 0xff, sizeof(struct virtual_entry));
+
+	st->sb = ddf;
+	ddf_set_updates_pending(ddf, NULL);
+	return 1;
+}
+
+static int chunk_to_shift(int chunksize)
+{
+	return ffs(chunksize/512)-1;
+}
+
+#ifndef MDASSEMBLE
+struct extent {
+	unsigned long long start, size;
+};
+static int cmp_extent(const void *av, const void *bv)
+{
+	const struct extent *a = av;
+	const struct extent *b = bv;
+	if (a->start < b->start)
+		return -1;
+	if (a->start > b->start)
+		return 1;
+	return 0;
+}
+
+static struct extent *get_extents(struct ddf_super *ddf, struct dl *dl)
+{
+	/* Find a list of used extents on the given physical device
+	 * (dnum) of the given ddf.
+	 * Return a malloced array of 'struct extent'
+	 */
+	struct extent *rv;
+	int n = 0;
+	unsigned int i;
+	__u16 state;
+
+	if (dl->pdnum < 0)
+		return NULL;
+	state = be16_to_cpu(ddf->phys->entries[dl->pdnum].state);
+
+	if ((state & (DDF_Online|DDF_Failed|DDF_Missing)) != DDF_Online)
+		return NULL;
+
+	rv = xmalloc(sizeof(struct extent) * (ddf->max_part + 2));
+
+	for (i = 0; i < ddf->max_part; i++) {
+		const struct vd_config *bvd;
+		unsigned int ibvd;
+		struct vcl *v = dl->vlist[i];
+		if (v == NULL ||
+		    get_pd_index_from_refnum(v, dl->disk.refnum, ddf->mppe,
+					     &bvd, &ibvd) == DDF_NOTFOUND)
+			continue;
+		rv[n].start = be64_to_cpu(LBA_OFFSET(ddf, bvd)[ibvd]);
+		rv[n].size = be64_to_cpu(bvd->blocks);
+		n++;
+	}
+	qsort(rv, n, sizeof(*rv), cmp_extent);
+
+	rv[n].start = be64_to_cpu(ddf->phys->entries[dl->pdnum].config_size);
+	rv[n].size = 0;
+	return rv;
+}
+
+static unsigned long long find_space(
+	struct ddf_super *ddf, struct dl *dl,
+	unsigned long long data_offset,
+	unsigned long long *size)
+{
+	/* Find if the requested amount of space is available.
+	 * If it is, return start.
+	 * If not, set *size to largest space.
+	 * If data_offset != INVALID_SECTORS, then the space must start
+	 * at this location.
+	 */
+	struct extent *e = get_extents(ddf, dl);
+	int i = 0;
+	unsigned long long pos = 0;
+	unsigned long long max_size = 0;
+
+	if (!e) {
+		*size = 0;
+		return INVALID_SECTORS;
+	}
+	do {
+		unsigned long long esize = e[i].start - pos;
+		if (data_offset != INVALID_SECTORS &&
+		    pos <= data_offset &&
+		    e[i].start > data_offset) {
+			pos = data_offset;
+			esize = e[i].start - pos;
+		}
+		if (data_offset != INVALID_SECTORS &&
+		    pos != data_offset) {
+			i++;
+			continue;
+		}
+		if (esize >= *size) {
+			/* Found! */
+			free(e);
+			return pos;
+		}
+		if (esize > max_size)
+			max_size = esize;
+		pos = e[i].start + e[i].size;
+		i++;
+	} while (e[i-1].size);
+	*size = max_size;
+	free(e);
+	return INVALID_SECTORS;
+}
+#endif
+
+static int init_super_ddf_bvd(struct supertype *st,
+			      mdu_array_info_t *info,
+			      unsigned long long size,
+			      char *name, char *homehost,
+			      int *uuid, unsigned long long data_offset)
+{
+	/* We are creating a BVD inside a pre-existing container.
+	 * so st->sb is already set.
+	 * We need to create a new vd_config and a new virtual_entry
+	 */
+	struct ddf_super *ddf = st->sb;
+	unsigned int venum, i;
+	struct virtual_entry *ve;
+	struct vcl *vcl;
+	struct vd_config *vc;
+
+	if (find_vde_by_name(ddf, name) != DDF_NOTFOUND) {
+		pr_err("This ddf already has an array called %s\n", name);
+		return 0;
+	}
+	venum = find_unused_vde(ddf);
+	if (venum == DDF_NOTFOUND) {
+		pr_err("Cannot find spare slot for virtual disk\n");
+		return 0;
+	}
+	ve = &ddf->virt->entries[venum];
+
+	/* A Virtual Disk GUID contains the T10 Vendor ID, controller type,
+	 * timestamp, random number
+	 */
+	make_header_guid(ve->guid);
+	ve->unit = cpu_to_be16(info->md_minor);
+	ve->pad0 = 0xFFFF;
+	ve->guid_crc._v16 = crc32(0, (unsigned char *)ddf->anchor.guid,
+				  DDF_GUID_LEN);
+	ve->type = cpu_to_be16(0);
+	ve->state = DDF_state_degraded; /* Will be modified as devices are added */
+	if (info->state & 1) /* clean */
+		ve->init_state = DDF_init_full;
+	else
+		ve->init_state = DDF_init_not;
+
+	memset(ve->pad1, 0xff, 14);
+	memset(ve->name, ' ', 16);
+	if (name)
+		strncpy(ve->name, name, 16);
+	ddf->virt->populated_vdes =
+		cpu_to_be16(be16_to_cpu(ddf->virt->populated_vdes)+1);
+
+	/* Now create a new vd_config */
+	if (posix_memalign((void**)&vcl, 512,
+		           (offsetof(struct vcl, conf) + ddf->conf_rec_len * 512)) != 0) {
+		pr_err("%s could not allocate vd_config\n", __func__);
+		return 0;
+	}
+	vcl->vcnum = venum;
+	vcl->block_sizes = NULL; /* FIXME not for CONCAT */
+	vc = &vcl->conf;
+
+	vc->magic = DDF_VD_CONF_MAGIC;
+	memcpy(vc->guid, ve->guid, DDF_GUID_LEN);
+	vc->timestamp = cpu_to_be32(time(0)-DECADE);
+	vc->seqnum = cpu_to_be32(1);
+	memset(vc->pad0, 0xff, 24);
+	vc->chunk_shift = chunk_to_shift(info->chunk_size);
+	if (layout_md2ddf(info, vc) == -1 ||
+		be16_to_cpu(vc->prim_elmnt_count) > ddf->mppe) {
+		pr_err("%s: unsupported RAID level/layout %d/%d with %d disks\n",
+		       __func__, info->level, info->layout, info->raid_disks);
+		free(vcl);
+		return 0;
+	}
+	vc->sec_elmnt_seq = 0;
+	if (alloc_other_bvds(ddf, vcl) != 0) {
+		pr_err("%s could not allocate other bvds\n",
+		       __func__);
+		free(vcl);
+		return 0;
+	}
+	vc->blocks = cpu_to_be64(info->size * 2);
+	vc->array_blocks = cpu_to_be64(
+		calc_array_size(info->level, info->raid_disks, info->layout,
+				info->chunk_size, info->size*2));
+	memset(vc->pad1, 0xff, 8);
+	vc->spare_refs[0] = cpu_to_be32(0xffffffff);
+	vc->spare_refs[1] = cpu_to_be32(0xffffffff);
+	vc->spare_refs[2] = cpu_to_be32(0xffffffff);
+	vc->spare_refs[3] = cpu_to_be32(0xffffffff);
+	vc->spare_refs[4] = cpu_to_be32(0xffffffff);
+	vc->spare_refs[5] = cpu_to_be32(0xffffffff);
+	vc->spare_refs[6] = cpu_to_be32(0xffffffff);
+	vc->spare_refs[7] = cpu_to_be32(0xffffffff);
+	memset(vc->cache_pol, 0, 8);
+	vc->bg_rate = 0x80;
+	memset(vc->pad2, 0xff, 3);
+	memset(vc->pad3, 0xff, 52);
+	memset(vc->pad4, 0xff, 192);
+	memset(vc->v0, 0xff, 32);
+	memset(vc->v1, 0xff, 32);
+	memset(vc->v2, 0xff, 16);
+	memset(vc->v3, 0xff, 16);
+	memset(vc->vendor, 0xff, 32);
+
+	memset(vc->phys_refnum, 0xff, 4*ddf->mppe);
+	memset(vc->phys_refnum+ddf->mppe, 0x00, 8*ddf->mppe);
+
+	for (i = 1; i < vc->sec_elmnt_count; i++) {
+		memcpy(vcl->other_bvds[i-1], vc, ddf->conf_rec_len * 512);
+		vcl->other_bvds[i-1]->sec_elmnt_seq = i;
+	}
+
+	vcl->next = ddf->conflist;
+	ddf->conflist = vcl;
+	ddf->currentconf = vcl;
+	ddf_set_updates_pending(ddf, NULL);
+	return 1;
+}
+
+#ifndef MDASSEMBLE
+static void add_to_super_ddf_bvd(struct supertype *st,
+				 mdu_disk_info_t *dk, int fd, char *devname,
+				 unsigned long long data_offset)
+{
+	/* fd and devname identify a device within the ddf container (st).
+	 * dk identifies a location in the new BVD.
+	 * We need to find suitable free space in that device and update
+	 * the phys_refnum and lba_offset for the newly created vd_config.
+	 * We might also want to update the type in the phys_disk
+	 * section.
+	 *
+	 * Alternately: fd == -1 and we have already chosen which device to
+	 * use and recorded in dlist->raid_disk;
+	 */
+	struct dl *dl;
+	struct ddf_super *ddf = st->sb;
+	struct vd_config *vc;
+	unsigned int i;
+	unsigned long long blocks, pos;
+	unsigned int raid_disk = dk->raid_disk;
+
+	if (fd == -1) {
+		for (dl = ddf->dlist; dl ; dl = dl->next)
+			if (dl->raiddisk == dk->raid_disk)
+				break;
+	} else {
+		for (dl = ddf->dlist; dl ; dl = dl->next)
+			if (dl->major == dk->major &&
+			    dl->minor == dk->minor)
+				break;
+	}
+	if (!dl || dl->pdnum < 0 || ! (dk->state & (1<<MD_DISK_SYNC)))
+		return;
+
+	vc = &ddf->currentconf->conf;
+	if (vc->sec_elmnt_count > 1) {
+		unsigned int n = be16_to_cpu(vc->prim_elmnt_count);
+		if (raid_disk >= n)
+			vc = ddf->currentconf->other_bvds[raid_disk / n - 1];
+		raid_disk %= n;
+	}
+
+	blocks = be64_to_cpu(vc->blocks);
+	if (ddf->currentconf->block_sizes)
+		blocks = ddf->currentconf->block_sizes[dk->raid_disk];
+
+	pos = find_space(ddf, dl, data_offset, &blocks);
+	if (pos == INVALID_SECTORS)
+		return;
+
+	ddf->currentdev = dk->raid_disk;
+	vc->phys_refnum[raid_disk] = dl->disk.refnum;
+	LBA_OFFSET(ddf, vc)[raid_disk] = cpu_to_be64(pos);
+
+	for (i = 0; i < ddf->max_part ; i++)
+		if (dl->vlist[i] == NULL)
+			break;
+	if (i == ddf->max_part)
+		return;
+	dl->vlist[i] = ddf->currentconf;
+
+	if (fd >= 0)
+		dl->fd = fd;
+	if (devname)
+		dl->devname = devname;
+
+	/* Check if we can mark array as optimal yet */
+	i = ddf->currentconf->vcnum;
+	ddf->virt->entries[i].state =
+		(ddf->virt->entries[i].state & ~DDF_state_mask)
+		| get_svd_state(ddf, ddf->currentconf);
+	be16_clear(ddf->phys->entries[dl->pdnum].type,
+		   cpu_to_be16(DDF_Global_Spare));
+	be16_set(ddf->phys->entries[dl->pdnum].type,
+		 cpu_to_be16(DDF_Active_in_VD));
+	dprintf("%s: added disk %d/%08x to VD %d/%s as disk %d\n",
+		__func__, dl->pdnum, be32_to_cpu(dl->disk.refnum),
+		ddf->currentconf->vcnum, guid_str(vc->guid),
+		dk->raid_disk);
+	ddf_set_updates_pending(ddf, vc);
+}
+
+static unsigned int find_unused_pde(const struct ddf_super *ddf)
+{
+	unsigned int i;
+	for (i = 0; i < be16_to_cpu(ddf->phys->max_pdes); i++) {
+		if (all_ff(ddf->phys->entries[i].guid))
+			return i;
+	}
+	return DDF_NOTFOUND;
+}
+
+static void _set_config_size(struct phys_disk_entry *pde, const struct dl *dl)
+{
+	__u64 cfs, t;
+	cfs = min(dl->size - 32*1024*2ULL, be64_to_cpu(dl->primary_lba));
+	t = be64_to_cpu(dl->secondary_lba);
+	if (t != ~(__u64)0)
+		cfs = min(cfs, t);
+	/*
+	 * Some vendor DDF structures interpret workspace_lba
+	 * very differently than we do: Make a sanity check on the value.
+	 */
+	t = be64_to_cpu(dl->workspace_lba);
+	if (t < cfs) {
+		__u64 wsp = cfs - t;
+		if (wsp > 1024*1024*2ULL && wsp > dl->size / 16) {
+			pr_err("%s: %x:%x: workspace size 0x%llx too big, ignoring\n",
+			       __func__, dl->major, dl->minor,
+			       (unsigned long long)wsp);
+		} else
+			cfs = t;
+	}
+	pde->config_size = cpu_to_be64(cfs);
+	dprintf("%s: %x:%x config_size %llx, DDF structure is %llx blocks\n",
+		__func__, dl->major, dl->minor,
+		(unsigned long long)cfs, (unsigned long long)(dl->size-cfs));
+}
+
+/* Add a device to a container, either while creating it or while
+ * expanding a pre-existing container
+ */
+static int add_to_super_ddf(struct supertype *st,
+			    mdu_disk_info_t *dk, int fd, char *devname,
+			    unsigned long long data_offset)
+{
+	struct ddf_super *ddf = st->sb;
+	struct dl *dd;
+	time_t now;
+	struct tm *tm;
+	unsigned long long size;
+	struct phys_disk_entry *pde;
+	unsigned int n, i;
+	struct stat stb;
+	__u32 *tptr;
+
+	if (ddf->currentconf) {
+		add_to_super_ddf_bvd(st, dk, fd, devname, data_offset);
+		return 0;
+	}
+
+	/* This is device numbered dk->number.  We need to create
+	 * a phys_disk entry and a more detailed disk_data entry.
+	 */
+	fstat(fd, &stb);
+	n = find_unused_pde(ddf);
+	if (n == DDF_NOTFOUND) {
+		pr_err("%s: No free slot in array, cannot add disk\n",
+		       __func__);
+		return 1;
+	}
+	pde = &ddf->phys->entries[n];
+	get_dev_size(fd, NULL, &size);
+	if (size <= 32*1024*1024) {
+		pr_err("%s: device size must be at least 32MB\n",
+		       __func__);
+		return 1;
+	}
+	size >>= 9;
+
+	if (posix_memalign((void**)&dd, 512,
+		           sizeof(*dd) + sizeof(dd->vlist[0]) * ddf->max_part) != 0) {
+		pr_err("%s could allocate buffer for new disk, aborting\n",
+		       __func__);
+		return 1;
+	}
+	dd->major = major(stb.st_rdev);
+	dd->minor = minor(stb.st_rdev);
+	dd->devname = devname;
+	dd->fd = fd;
+	dd->spare = NULL;
+
+	dd->disk.magic = DDF_PHYS_DATA_MAGIC;
+	now = time(0);
+	tm = localtime(&now);
+	sprintf(dd->disk.guid, "%8s%04d%02d%02d",
+		T10, tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday);
+	tptr = (__u32 *)(dd->disk.guid + 16);
+	*tptr++ = random32();
+	*tptr = random32();
+
+	do {
+		/* Cannot be bothered finding a CRC of some irrelevant details*/
+		dd->disk.refnum._v32 = random32();
+		for (i = be16_to_cpu(ddf->active->max_pd_entries);
+		     i > 0; i--)
+			if (be32_eq(ddf->phys->entries[i-1].refnum,
+				    dd->disk.refnum))
+				break;
+	} while (i > 0);
+
+	dd->disk.forced_ref = 1;
+	dd->disk.forced_guid = 1;
+	memset(dd->disk.vendor, ' ', 32);
+	memcpy(dd->disk.vendor, "Linux", 5);
+	memset(dd->disk.pad, 0xff, 442);
+	for (i = 0; i < ddf->max_part ; i++)
+		dd->vlist[i] = NULL;
+
+	dd->pdnum = n;
+
+	if (st->update_tail) {
+		int len = (sizeof(struct phys_disk) +
+			   sizeof(struct phys_disk_entry));
+		struct phys_disk *pd;
+
+		pd = xmalloc(len);
+		pd->magic = DDF_PHYS_RECORDS_MAGIC;
+		pd->used_pdes = cpu_to_be16(n);
+		pde = &pd->entries[0];
+		dd->mdupdate = pd;
+	} else
+		ddf->phys->used_pdes = cpu_to_be16(
+			1 + be16_to_cpu(ddf->phys->used_pdes));
+
+	memcpy(pde->guid, dd->disk.guid, DDF_GUID_LEN);
+	pde->refnum = dd->disk.refnum;
+	pde->type = cpu_to_be16(DDF_Forced_PD_GUID | DDF_Global_Spare);
+	pde->state = cpu_to_be16(DDF_Online);
+	dd->size = size;
+	/*
+	 * If there is already a device in dlist, try to reserve the same
+	 * amount of workspace. Otherwise, use 32MB.
+	 * We checked disk size above already.
+	 */
+#define __calc_lba(new, old, lba, mb) do { \
+		unsigned long long dif; \
+		if ((old) != NULL) \
+			dif = (old)->size - be64_to_cpu((old)->lba); \
+		else \
+			dif = (new)->size; \
+		if ((new)->size > dif) \
+			(new)->lba = cpu_to_be64((new)->size - dif); \
+		else \
+			(new)->lba = cpu_to_be64((new)->size - (mb*1024*2)); \
+	} while (0)
+	__calc_lba(dd, ddf->dlist, workspace_lba, 32);
+	__calc_lba(dd, ddf->dlist, primary_lba, 16);
+	if (ddf->dlist == NULL ||
+	    be64_to_cpu(ddf->dlist->secondary_lba) != ~(__u64)0)
+		__calc_lba(dd, ddf->dlist, secondary_lba, 32);
+	_set_config_size(pde, dd);
+
+	sprintf(pde->path, "%17.17s","Information: nil") ;
+	memset(pde->pad, 0xff, 6);
+
+	if (st->update_tail) {
+		dd->next = ddf->add_list;
+		ddf->add_list = dd;
+	} else {
+		dd->next = ddf->dlist;
+		ddf->dlist = dd;
+		ddf_set_updates_pending(ddf, NULL);
+	}
+
+	return 0;
+}
+
+static int remove_from_super_ddf(struct supertype *st, mdu_disk_info_t *dk)
+{
+	struct ddf_super *ddf = st->sb;
+	struct dl *dl;
+
+	/* mdmon has noticed that this disk (dk->major/dk->minor) has
+	 * disappeared from the container.
+	 * We need to arrange that it disappears from the metadata and
+	 * internal data structures too.
+	 * Most of the work is done by ddf_process_update which edits
+	 * the metadata and closes the file handle and attaches the memory
+	 * where free_updates will free it.
+	 */
+	for (dl = ddf->dlist; dl ; dl = dl->next)
+		if (dl->major == dk->major &&
+		    dl->minor == dk->minor)
+			break;
+	if (!dl || dl->pdnum < 0)
+		return -1;
+
+	if (st->update_tail) {
+		int len = (sizeof(struct phys_disk) +
+			   sizeof(struct phys_disk_entry));
+		struct phys_disk *pd;
+
+		pd = xmalloc(len);
+		pd->magic = DDF_PHYS_RECORDS_MAGIC;
+		pd->used_pdes = cpu_to_be16(dl->pdnum);
+		pd->entries[0].state = cpu_to_be16(DDF_Missing);
+		append_metadata_update(st, pd, len);
+	}
+	return 0;
+}
+#endif
+
+/*
+ * This is the write_init_super method for a ddf container.  It is
+ * called when creating a container or adding another device to a
+ * container.
+ */
+
+static int __write_ddf_structure(struct dl *d, struct ddf_super *ddf, __u8 type)
+{
+	unsigned long long sector;
+	struct ddf_header *header;
+	int fd, i, n_config, conf_size, buf_size;
+	int ret = 0;
+	char *conf;
+
+	fd = d->fd;
+
+	switch (type) {
+	case DDF_HEADER_PRIMARY:
+		header = &ddf->primary;
+		sector = be64_to_cpu(header->primary_lba);
+		break;
+	case DDF_HEADER_SECONDARY:
+		header = &ddf->secondary;
+		sector = be64_to_cpu(header->secondary_lba);
+		break;
+	default:
+		return 0;
+	}
+	if (sector == ~(__u64)0)
+		return 0;
+
+	header->type = type;
+	header->openflag = 1;
+	header->crc = calc_crc(header, 512);
+
+	lseek64(fd, sector<<9, 0);
+	if (write(fd, header, 512) < 0)
+		goto out;
+
+	ddf->controller.crc = calc_crc(&ddf->controller, 512);
+	if (write(fd, &ddf->controller, 512) < 0)
+		goto out;
+
+	ddf->phys->crc = calc_crc(ddf->phys, ddf->pdsize);
+	if (write(fd, ddf->phys, ddf->pdsize) < 0)
+		goto out;
+	ddf->virt->crc = calc_crc(ddf->virt, ddf->vdsize);
+	if (write(fd, ddf->virt, ddf->vdsize) < 0)
+		goto out;
+
+	/* Now write lots of config records. */
+	n_config = ddf->max_part;
+	conf_size = ddf->conf_rec_len * 512;
+	conf = ddf->conf;
+	buf_size = conf_size * (n_config + 1);
+	if (!conf) {
+		if (posix_memalign((void**)&conf, 512, buf_size) != 0)
+			goto out;
+		ddf->conf = conf;
+	}
+	for (i = 0 ; i <= n_config ; i++) {
+		struct vcl *c;
+		struct vd_config *vdc = NULL;
+		if (i == n_config) {
+			c = (struct vcl *)d->spare;
+			if (c)
+				vdc = &c->conf;
+		} else {
+			unsigned int dummy;
+			c = d->vlist[i];
+			if (c)
+				get_pd_index_from_refnum(
+					c, d->disk.refnum,
+					ddf->mppe,
+					(const struct vd_config **)&vdc,
+					&dummy);
+		}
+		if (vdc) {
+			dprintf("writing conf record %i on disk %08x for %s/%u\n",
+				i, be32_to_cpu(d->disk.refnum),
+				guid_str(vdc->guid),
+				vdc->sec_elmnt_seq);
+			vdc->crc = calc_crc(vdc, conf_size);
+			memcpy(conf + i*conf_size, vdc, conf_size);
+		} else
+			memset(conf + i*conf_size, 0xff, conf_size);
+	}
+	if (write(fd, conf, buf_size) != buf_size)
+		goto out;
+
+	d->disk.crc = calc_crc(&d->disk, 512);
+	if (write(fd, &d->disk, 512) < 0)
+		goto out;
+
+	ret = 1;
+out:
+	header->openflag = 0;
+	header->crc = calc_crc(header, 512);
+
+	lseek64(fd, sector<<9, 0);
+	if (write(fd, header, 512) < 0)
+		ret = 0;
+
+	return ret;
+}
+
+static int _write_super_to_disk(struct ddf_super *ddf, struct dl *d)
+{
+	unsigned long long size;
+	int fd = d->fd;
+	if (fd < 0)
+		return 0;
+
+	/* We need to fill in the primary, (secondary) and workspace
+	 * lba's in the headers, set their checksums,
+	 * Also checksum phys, virt....
+	 *
+	 * Then write everything out, finally the anchor is written.
+	 */
+	get_dev_size(fd, NULL, &size);
+	size /= 512;
+	memcpy(&ddf->anchor, ddf->active, 512);
+	if (be64_to_cpu(d->workspace_lba) != 0ULL)
+		ddf->anchor.workspace_lba = d->workspace_lba;
+	else
+		ddf->anchor.workspace_lba =
+			cpu_to_be64(size - 32*1024*2);
+	if (be64_to_cpu(d->primary_lba) != 0ULL)
+		ddf->anchor.primary_lba = d->primary_lba;
+	else
+		ddf->anchor.primary_lba =
+			cpu_to_be64(size - 16*1024*2);
+	if (be64_to_cpu(d->secondary_lba) != 0ULL)
+		ddf->anchor.secondary_lba = d->secondary_lba;
+	else
+		ddf->anchor.secondary_lba =
+			cpu_to_be64(size - 32*1024*2);
+	ddf->anchor.timestamp = cpu_to_be32(time(0) - DECADE);
+	memcpy(&ddf->primary, &ddf->anchor, 512);
+	memcpy(&ddf->secondary, &ddf->anchor, 512);
+
+	ddf->anchor.openflag = 0xFF; /* 'open' means nothing */
+	ddf->anchor.seq = cpu_to_be32(0xFFFFFFFF); /* no sequencing in anchor */
+	ddf->anchor.crc = calc_crc(&ddf->anchor, 512);
+
+	if (!__write_ddf_structure(d, ddf, DDF_HEADER_PRIMARY))
+		return 0;
+
+	if (!__write_ddf_structure(d, ddf, DDF_HEADER_SECONDARY))
+		return 0;
+
+	lseek64(fd, (size-1)*512, SEEK_SET);
+	if (write(fd, &ddf->anchor, 512) < 0)
+		return 0;
+
+	return 1;
+}
+
+#ifndef MDASSEMBLE
+static int __write_init_super_ddf(struct supertype *st)
+{
+	struct ddf_super *ddf = st->sb;
+	struct dl *d;
+	int attempts = 0;
+	int successes = 0;
+
+	pr_state(ddf, __func__);
+
+	/* try to write updated metadata,
+	 * if we catch a failure move on to the next disk
+	 */
+	for (d = ddf->dlist; d; d=d->next) {
+		attempts++;
+		successes += _write_super_to_disk(ddf, d);
+	}
+
+	return attempts != successes;
+}
+
+static int write_init_super_ddf(struct supertype *st)
+{
+	struct ddf_super *ddf = st->sb;
+	struct vcl *currentconf = ddf->currentconf;
+
+	/* We are done with currentconf - reset it so st refers to the container */
+	ddf->currentconf = NULL;
+
+	if (st->update_tail) {
+		/* queue the virtual_disk and vd_config as metadata updates */
+		struct virtual_disk *vd;
+		struct vd_config *vc;
+		int len, tlen;
+		unsigned int i;
+
+		if (!currentconf) {
+			/* Must be adding a physical disk to the container */
+			int len = (sizeof(struct phys_disk) +
+				   sizeof(struct phys_disk_entry));
+
+			/* adding a disk to the container. */
+			if (!ddf->add_list)
+				return 0;
+
+			append_metadata_update(st, ddf->add_list->mdupdate, len);
+			ddf->add_list->mdupdate = NULL;
+			return 0;
+		}
+
+		/* Newly created VD */
+
+		/* First the virtual disk.  We have a slightly fake header */
+		len = sizeof(struct virtual_disk) + sizeof(struct virtual_entry);
+		vd = xmalloc(len);
+		*vd = *ddf->virt;
+		vd->entries[0] = ddf->virt->entries[currentconf->vcnum];
+		vd->populated_vdes = cpu_to_be16(currentconf->vcnum);
+		append_metadata_update(st, vd, len);
+
+		/* Then the vd_config */
+		len = ddf->conf_rec_len * 512;
+		tlen = len * currentconf->conf.sec_elmnt_count;
+		vc = xmalloc(tlen);
+		memcpy(vc, &currentconf->conf, len);
+		for (i = 1; i < currentconf->conf.sec_elmnt_count; i++)
+			memcpy((char *)vc + i*len, currentconf->other_bvds[i-1],
+			       len);
+		append_metadata_update(st, vc, tlen);
+
+		return 0;
+	} else {
+		struct dl *d;
+		if (!currentconf)
+			for (d = ddf->dlist; d; d=d->next)
+				while (Kill(d->devname, NULL, 0, -1, 1) == 0);
+		/* Note: we don't close the fd's now, but a subsequent
+		 * ->free_super() will
+		 */
+		return __write_init_super_ddf(st);
+	}
+}
+
+#endif
+
+static __u64 avail_size_ddf(struct supertype *st, __u64 devsize,
+			    unsigned long long data_offset)
+{
+	/* We must reserve the last 32Meg */
+	if (devsize <= 32*1024*2)
+		return 0;
+	return devsize - 32*1024*2;
+}
+
+#ifndef MDASSEMBLE
+
+static int reserve_space(struct supertype *st, int raiddisks,
+			 unsigned long long size, int chunk,
+			 unsigned long long data_offset,
+			 unsigned long long *freesize)
+{
+	/* Find 'raiddisks' spare extents at least 'size' big (but
+	 * only caring about multiples of 'chunk') and remember
+	 * them.   If size==0, find the largest size possible.
+	 * Report available size in *freesize
+	 * If space cannot be found, fail.
+	 */
+	struct dl *dl;
+	struct ddf_super *ddf = st->sb;
+	int cnt = 0;
+
+	for (dl = ddf->dlist; dl ; dl=dl->next) {
+		dl->raiddisk = -1;
+		dl->esize = 0;
+	}
+	/* Now find largest extent on each device */
+	for (dl = ddf->dlist ; dl ; dl=dl->next) {
+		unsigned long long minsize = ULLONG_MAX;
+
+		find_space(ddf, dl, data_offset, &minsize);
+		if (minsize >= size && minsize >= (unsigned)chunk) {
+			cnt++;
+			dl->esize = minsize;
+		}
+	}
+	if (cnt < raiddisks) {
+		pr_err("not enough devices with space to create array.\n");
+		return 0; /* No enough free spaces large enough */
+	}
+	if (size == 0) {
+		/* choose the largest size of which there are at least 'raiddisk' */
+		for (dl = ddf->dlist ; dl ; dl=dl->next) {
+			struct dl *dl2;
+			if (dl->esize <= size)
+				continue;
+			/* This is bigger than 'size', see if there are enough */
+			cnt = 0;
+			for (dl2 = ddf->dlist; dl2 ; dl2=dl2->next)
+				if (dl2->esize >= dl->esize)
+					cnt++;
+			if (cnt >= raiddisks)
+				size = dl->esize;
+		}
+		if (chunk) {
+			size = size / chunk;
+			size *= chunk;
+		}
+		*freesize = size;
+		if (size < 32) {
+			pr_err("not enough spare devices to create array.\n");
+			return 0;
+		}
+	}
+	/* We have a 'size' of which there are enough spaces.
+	 * We simply do a first-fit */
+	cnt = 0;
+	for (dl = ddf->dlist ; dl && cnt < raiddisks ; dl=dl->next) {
+		if (dl->esize < size)
+			continue;
+
+		dl->raiddisk = cnt;
+		cnt++;
+	}
+	return 1;
+}
+
+static int validate_geometry_ddf(struct supertype *st,
+				 int level, int layout, int raiddisks,
+				 int *chunk, unsigned long long size,
+				 unsigned long long data_offset,
+				 char *dev, unsigned long long *freesize,
+				 int verbose)
+{
+	int fd;
+	struct mdinfo *sra;
+	int cfd;
+
+	/* ddf potentially supports lots of things, but it depends on
+	 * what devices are offered (and maybe kernel version?)
+	 * If given unused devices, we will make a container.
+	 * If given devices in a container, we will make a BVD.
+	 * If given BVDs, we make an SVD, changing all the GUIDs in the process.
+	 */
+
+	if (*chunk == UnSet)
+		*chunk = DEFAULT_CHUNK;
+
+	if (level == LEVEL_NONE)
+		level = LEVEL_CONTAINER;
+	if (level == LEVEL_CONTAINER) {
+		/* Must be a fresh device to add to a container */
+		return validate_geometry_ddf_container(st, level, layout,
+						       raiddisks, *chunk,
+						       size, data_offset, dev,
+						       freesize,
+						       verbose);
+	}
+
+	if (!dev) {
+		mdu_array_info_t array = {
+			.level = level,
+			.layout = layout,
+			.raid_disks = raiddisks
+		};
+		struct vd_config conf;
+		if (layout_md2ddf(&array, &conf) == -1) {
+			if (verbose)
+				pr_err("DDF does not support level %d /layout %d arrays with %d disks\n",
+				       level, layout, raiddisks);
+			return 0;
+		}
+		/* Should check layout? etc */
+
+		if (st->sb && freesize) {
+			/* --create was given a container to create in.
+			 * So we need to check that there are enough
+			 * free spaces and return the amount of space.
+			 * We may as well remember which drives were
+			 * chosen so that add_to_super/getinfo_super
+			 * can return them.
+			 */
+			return reserve_space(st, raiddisks, size, *chunk,
+					     data_offset, freesize);
+		}
+		return 1;
+	}
+
+	if (st->sb) {
+		/* A container has already been opened, so we are
+		 * creating in there.  Maybe a BVD, maybe an SVD.
+		 * Should make a distinction one day.
+		 */
+		return validate_geometry_ddf_bvd(st, level, layout, raiddisks,
+						 chunk, size, data_offset, dev,
+						 freesize,
+						 verbose);
+	}
+	/* This is the first device for the array.
+	 * If it is a container, we read it in and do automagic allocations,
+	 * no other devices should be given.
+	 * Otherwise it must be a member device of a container, and we
+	 * do manual allocation.
+	 * Later we should check for a BVD and make an SVD.
+	 */
+	fd = open(dev, O_RDONLY|O_EXCL, 0);
+	if (fd >= 0) {
+		close(fd);
+		/* Just a bare device, no good to us */
+		if (verbose)
+			pr_err("ddf: Cannot create this array "
+			       "on device %s - a container is required.\n",
+			       dev);
+		return 0;
+	}
+	if (errno != EBUSY || (fd = open(dev, O_RDONLY, 0)) < 0) {
+		if (verbose)
+			pr_err("ddf: Cannot open %s: %s\n",
+			       dev, strerror(errno));
+		return 0;
+	}
+	/* Well, it is in use by someone, maybe a 'ddf' container. */
+	cfd = open_container(fd);
+	if (cfd < 0) {
+		close(fd);
+		if (verbose)
+			pr_err("ddf: Cannot use %s: %s\n",
+			       dev, strerror(EBUSY));
+		return 0;
+	}
+	sra = sysfs_read(cfd, NULL, GET_VERSION);
+	close(fd);
+	if (sra && sra->array.major_version == -1 &&
+	    strcmp(sra->text_version, "ddf") == 0) {
+		/* This is a member of a ddf container.  Load the container
+		 * and try to create a bvd
+		 */
+		struct ddf_super *ddf;
+		if (load_super_ddf_all(st, cfd, (void **)&ddf, NULL) == 0) {
+			st->sb = ddf;
+			strcpy(st->container_devnm, fd2devnm(cfd));
+			close(cfd);
+			return validate_geometry_ddf_bvd(st, level, layout,
+							 raiddisks, chunk, size,
+							 data_offset,
+							 dev, freesize,
+							 verbose);
+		}
+		close(cfd);
+	} else /* device may belong to a different container */
+		return 0;
+
+	return 1;
+}
+
+static int
+validate_geometry_ddf_container(struct supertype *st,
+				int level, int layout, int raiddisks,
+				int chunk, unsigned long long size,
+				unsigned long long data_offset,
+				char *dev, unsigned long long *freesize,
+				int verbose)
+{
+	int fd;
+	unsigned long long ldsize;
+
+	if (level != LEVEL_CONTAINER)
+		return 0;
+	if (!dev)
+		return 1;
+
+	fd = open(dev, O_RDONLY|O_EXCL, 0);
+	if (fd < 0) {
+		if (verbose)
+			pr_err("ddf: Cannot open %s: %s\n",
+			       dev, strerror(errno));
+		return 0;
+	}
+	if (!get_dev_size(fd, dev, &ldsize)) {
+		close(fd);
+		return 0;
+	}
+	close(fd);
+
+	*freesize = avail_size_ddf(st, ldsize >> 9, INVALID_SECTORS);
+	if (*freesize == 0)
+		return 0;
+
+	return 1;
+}
+
+static int validate_geometry_ddf_bvd(struct supertype *st,
+				     int level, int layout, int raiddisks,
+				     int *chunk, unsigned long long size,
+				     unsigned long long data_offset,
+				     char *dev, unsigned long long *freesize,
+				     int verbose)
+{
+	struct stat stb;
+	struct ddf_super *ddf = st->sb;
+	struct dl *dl;
+	unsigned long long maxsize;
+	/* ddf/bvd supports lots of things, but not containers */
+	if (level == LEVEL_CONTAINER) {
+		if (verbose)
+			pr_err("DDF cannot create a container within an container\n");
+		return 0;
+	}
+	/* We must have the container info already read in. */
+	if (!ddf)
+		return 0;
+
+	if (!dev) {
+		/* General test:  make sure there is space for
+		 * 'raiddisks' device extents of size 'size'.
+		 */
+		unsigned long long minsize = size;
+		int dcnt = 0;
+		if (minsize == 0)
+			minsize = 8;
+		for (dl = ddf->dlist; dl ; dl = dl->next) {
+			if (find_space(ddf, dl, data_offset, &minsize)
+			    != INVALID_SECTORS)
+				dcnt++;
+		}
+		if (dcnt < raiddisks) {
+			if (verbose)
+				pr_err("ddf: Not enough devices with "
+				       "space for this array (%d < %d)\n",
+				       dcnt, raiddisks);
+			return 0;
+		}
+		return 1;
+	}
+	/* This device must be a member of the set */
+	if (stat(dev, &stb) < 0)
+		return 0;
+	if ((S_IFMT & stb.st_mode) != S_IFBLK)
+		return 0;
+	for (dl = ddf->dlist ; dl ; dl = dl->next) {
+		if (dl->major == (int)major(stb.st_rdev) &&
+		    dl->minor == (int)minor(stb.st_rdev))
+			break;
+	}
+	if (!dl) {
+		if (verbose)
+			pr_err("ddf: %s is not in the "
+			       "same DDF set\n",
+			       dev);
+		return 0;
+	}
+	maxsize = ULLONG_MAX;
+	find_space(ddf, dl, data_offset, &maxsize);
+	*freesize = maxsize;
+
+	return 1;
+}
+
+static int load_super_ddf_all(struct supertype *st, int fd,
+			      void **sbp, char *devname)
+{
+	struct mdinfo *sra;
+	struct ddf_super *super;
+	struct mdinfo *sd, *best = NULL;
+	int bestseq = 0;
+	int seq;
+	char nm[20];
+	int dfd;
+
+	sra = sysfs_read(fd, 0, GET_LEVEL|GET_VERSION|GET_DEVS|GET_STATE);
+	if (!sra)
+		return 1;
+	if (sra->array.major_version != -1 ||
+	    sra->array.minor_version != -2 ||
+	    strcmp(sra->text_version, "ddf") != 0)
+		return 1;
+
+	if (posix_memalign((void**)&super, 512, sizeof(*super)) != 0)
+		return 1;
+	memset(super, 0, sizeof(*super));
+
+	/* first, try each device, and choose the best ddf */
+	for (sd = sra->devs ; sd ; sd = sd->next) {
+		int rv;
+		sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
+		dfd = dev_open(nm, O_RDONLY);
+		if (dfd < 0)
+			return 2;
+		rv = load_ddf_headers(dfd, super, NULL);
+		close(dfd);
+		if (rv == 0) {
+			seq = be32_to_cpu(super->active->seq);
+			if (super->active->openflag)
+				seq--;
+			if (!best || seq > bestseq) {
+				bestseq = seq;
+				best = sd;
+			}
+		}
+	}
+	if (!best)
+		return 1;
+	/* OK, load this ddf */
+	sprintf(nm, "%d:%d", best->disk.major, best->disk.minor);
+	dfd = dev_open(nm, O_RDONLY);
+	if (dfd < 0)
+		return 1;
+	load_ddf_headers(dfd, super, NULL);
+	load_ddf_global(dfd, super, NULL);
+	close(dfd);
+	/* Now we need the device-local bits */
+	for (sd = sra->devs ; sd ; sd = sd->next) {
+		int rv;
+
+		sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
+		dfd = dev_open(nm, O_RDWR);
+		if (dfd < 0)
+			return 2;
+		rv = load_ddf_headers(dfd, super, NULL);
+		if (rv == 0)
+			rv = load_ddf_local(dfd, super, NULL, 1);
+		if (rv)
+			return 1;
+	}
+
+	*sbp = super;
+	if (st->ss == NULL) {
+		st->ss = &super_ddf;
+		st->minor_version = 0;
+		st->max_devs = 512;
+	}
+	strcpy(st->container_devnm, fd2devnm(fd));
+	return 0;
+}
+
+static int load_container_ddf(struct supertype *st, int fd,
+			      char *devname)
+{
+	return load_super_ddf_all(st, fd, &st->sb, devname);
+}
+
+#endif /* MDASSEMBLE */
+
+static int check_secondary(const struct vcl *vc)
+{
+	const struct vd_config *conf = &vc->conf;
+	int i;
+
+	/* The only DDF secondary RAID level md can support is
+	 * RAID 10, if the stripe sizes and Basic volume sizes
+	 * are all equal.
+	 * Other configurations could in theory be supported by exposing
+	 * the BVDs to user space and using device mapper for the secondary
+	 * mapping. So far we don't support that.
+	 */
+
+	__u64 sec_elements[4] = {0, 0, 0, 0};
+#define __set_sec_seen(n) (sec_elements[(n)>>6] |= (1<<((n)&63)))
+#define __was_sec_seen(n) ((sec_elements[(n)>>6] & (1<<((n)&63))) != 0)
+
+	if (vc->other_bvds == NULL) {
+		pr_err("No BVDs for secondary RAID found\n");
+		return -1;
+	}
+	if (conf->prl != DDF_RAID1) {
+		pr_err("Secondary RAID level only supported for mirrored BVD\n");
+		return -1;
+	}
+	if (conf->srl != DDF_2STRIPED && conf->srl != DDF_2SPANNED) {
+		pr_err("Secondary RAID level %d is unsupported\n",
+		       conf->srl);
+		return -1;
+	}
+	__set_sec_seen(conf->sec_elmnt_seq);
+	for (i = 0; i < conf->sec_elmnt_count-1; i++) {
+		const struct vd_config *bvd = vc->other_bvds[i];
+		if (bvd->sec_elmnt_seq == DDF_UNUSED_BVD)
+			continue;
+		if (bvd->srl != conf->srl) {
+			pr_err("Inconsistent secondary RAID level across BVDs\n");
+			return -1;
+		}
+		if (bvd->prl != conf->prl) {
+			pr_err("Different RAID levels for BVDs are unsupported\n");
+			return -1;
+		}
+		if (!be16_eq(bvd->prim_elmnt_count, conf->prim_elmnt_count)) {
+			pr_err("All BVDs must have the same number of primary elements\n");
+			return -1;
+		}
+		if (bvd->chunk_shift != conf->chunk_shift) {
+			pr_err("Different strip sizes for BVDs are unsupported\n");
+			return -1;
+		}
+		if (!be64_eq(bvd->array_blocks, conf->array_blocks)) {
+			pr_err("Different BVD sizes are unsupported\n");
+			return -1;
+		}
+		__set_sec_seen(bvd->sec_elmnt_seq);
+	}
+	for (i = 0; i < conf->sec_elmnt_count; i++) {
+		if (!__was_sec_seen(i)) {
+			/* pr_err("BVD %d is missing\n", i); */
+			return -1;
+		}
+	}
+	return 0;
+}
+
+static unsigned int get_pd_index_from_refnum(const struct vcl *vc,
+					     be32 refnum, unsigned int nmax,
+					     const struct vd_config **bvd,
+					     unsigned int *idx)
+{
+	unsigned int i, j, n, sec, cnt;
+
+	cnt = be16_to_cpu(vc->conf.prim_elmnt_count);
+	sec = (vc->conf.sec_elmnt_count == 1 ? 0 : vc->conf.sec_elmnt_seq);
+
+	for (i = 0, j = 0 ; i < nmax ; i++) {
+		/* j counts valid entries for this BVD */
+		if (be32_eq(vc->conf.phys_refnum[i], refnum)) {
+			*bvd = &vc->conf;
+			*idx = i;
+			return sec * cnt + j;
+		}
+		if (be32_to_cpu(vc->conf.phys_refnum[i]) != 0xffffffff)
+			j++;
+	}
+	if (vc->other_bvds == NULL)
+		goto bad;
+
+	for (n = 1; n < vc->conf.sec_elmnt_count; n++) {
+		struct vd_config *vd = vc->other_bvds[n-1];
+		sec = vd->sec_elmnt_seq;
+		if (sec == DDF_UNUSED_BVD)
+			continue;
+		for (i = 0, j = 0 ; i < nmax ; i++) {
+			if (be32_eq(vd->phys_refnum[i], refnum)) {
+				*bvd = vd;
+				*idx = i;
+				return sec * cnt + j;
+			}
+			if (be32_to_cpu(vd->phys_refnum[i]) != 0xffffffff)
+				j++;
+		}
+	}
+bad:
+	*bvd = NULL;
+	return DDF_NOTFOUND;
+}
+
+static struct mdinfo *container_content_ddf(struct supertype *st, char *subarray)
+{
+	/* Given a container loaded by load_super_ddf_all,
+	 * extract information about all the arrays into
+	 * an mdinfo tree.
+	 *
+	 * For each vcl in conflist: create an mdinfo, fill it in,
+	 *  then look for matching devices (phys_refnum) in dlist
+	 *  and create appropriate device mdinfo.
+	 */
+	struct ddf_super *ddf = st->sb;
+	struct mdinfo *rest = NULL;
+	struct vcl *vc;
+
+	for (vc = ddf->conflist ; vc ; vc=vc->next) {
+		unsigned int i;
+		struct mdinfo *this;
+		char *ep;
+		__u32 *cptr;
+		unsigned int pd;
+
+		if (subarray &&
+		    (strtoul(subarray, &ep, 10) != vc->vcnum ||
+		     *ep != '\0'))
+			continue;
+
+		if (vc->conf.sec_elmnt_count > 1) {
+			if (check_secondary(vc) != 0)
+				continue;
+		}
+
+		this = xcalloc(1, sizeof(*this));
+		this->next = rest;
+		rest = this;
+
+		if (layout_ddf2md(&vc->conf, &this->array))
+			continue;
+		this->array.md_minor      = -1;
+		this->array.major_version = -1;
+		this->array.minor_version = -2;
+		this->safe_mode_delay	  = DDF_SAFE_MODE_DELAY;
+		cptr = (__u32 *)(vc->conf.guid + 16);
+		this->array.ctime         = DECADE + __be32_to_cpu(*cptr);
+		this->array.utime	  = DECADE +
+			be32_to_cpu(vc->conf.timestamp);
+		this->array.chunk_size	  = 512 << vc->conf.chunk_shift;
+
+		i = vc->vcnum;
+		if ((ddf->virt->entries[i].state & DDF_state_inconsistent) ||
+		    (ddf->virt->entries[i].init_state & DDF_initstate_mask) !=
+		    DDF_init_full) {
+			this->array.state = 0;
+			this->resync_start = 0;
+		} else {
+			this->array.state = 1;
+			this->resync_start = MaxSector;
+		}
+		_ddf_array_name(this->name, ddf, i);
+		memset(this->uuid, 0, sizeof(this->uuid));
+		this->component_size	  = be64_to_cpu(vc->conf.blocks);
+		this->array.size	  = this->component_size / 2;
+		this->container_member	  = i;
+
+		ddf->currentconf = vc;
+		uuid_from_super_ddf(st, this->uuid);
+		if (!subarray)
+			ddf->currentconf = NULL;
+
+		sprintf(this->text_version, "/%s/%d",
+			st->container_devnm, this->container_member);
+
+		for (pd = 0; pd < be16_to_cpu(ddf->phys->max_pdes); pd++) {
+			struct mdinfo *dev;
+			struct dl *d;
+			const struct vd_config *bvd;
+			unsigned int iphys;
+			int stt;
+
+			if (be32_to_cpu(ddf->phys->entries[pd].refnum)
+			    == 0xFFFFFFFF)
+				continue;
+
+			stt = be16_to_cpu(ddf->phys->entries[pd].state);
+			if ((stt & (DDF_Online|DDF_Failed|DDF_Rebuilding))
+			    != DDF_Online)
+				continue;
+
+			i = get_pd_index_from_refnum(
+				vc, ddf->phys->entries[pd].refnum,
+				ddf->mppe, &bvd, &iphys);
+			if (i == DDF_NOTFOUND)
+				continue;
+
+			this->array.working_disks++;
+
+			for (d = ddf->dlist; d ; d=d->next)
+				if (be32_eq(d->disk.refnum,
+					    ddf->phys->entries[pd].refnum))
+					break;
+			if (d == NULL)
+				/* Haven't found that one yet, maybe there are others */
+				continue;
+
+			dev = xcalloc(1, sizeof(*dev));
+			dev->next	 = this->devs;
+			this->devs	 = dev;
+
+			dev->disk.number = be32_to_cpu(d->disk.refnum);
+			dev->disk.major	 = d->major;
+			dev->disk.minor	 = d->minor;
+			dev->disk.raid_disk = i;
+			dev->disk.state	 = (1<<MD_DISK_SYNC)|(1<<MD_DISK_ACTIVE);
+			dev->recovery_start = MaxSector;
+
+			dev->events	 = be32_to_cpu(ddf->active->seq);
+			dev->data_offset =
+				be64_to_cpu(LBA_OFFSET(ddf, bvd)[iphys]);
+			dev->component_size = be64_to_cpu(bvd->blocks);
+			if (d->devname)
+				strcpy(dev->name, d->devname);
+		}
+	}
+	return rest;
+}
+
+static int store_super_ddf(struct supertype *st, int fd)
+{
+	struct ddf_super *ddf = st->sb;
+	unsigned long long dsize;
+	void *buf;
+	int rc;
+
+	if (!ddf)
+		return 1;
+
+	if (!get_dev_size(fd, NULL, &dsize))
+		return 1;
+
+	if (ddf->dlist || ddf->conflist) {
+		struct stat sta;
+		struct dl *dl;
+		int ofd, ret;
+
+		if (fstat(fd, &sta) == -1 || !S_ISBLK(sta.st_mode)) {
+			pr_err("%s: file descriptor for invalid device\n",
+			       __func__);
+			return 1;
+		}
+		for (dl = ddf->dlist; dl; dl = dl->next)
+			if (dl->major == (int)major(sta.st_rdev) &&
+			    dl->minor == (int)minor(sta.st_rdev))
+				break;
+		if (!dl) {
+			pr_err("%s: couldn't find disk %d/%d\n", __func__,
+			       (int)major(sta.st_rdev),
+			       (int)minor(sta.st_rdev));
+			return 1;
+		}
+		ofd = dl->fd;
+		dl->fd = fd;
+		ret = (_write_super_to_disk(ddf, dl) != 1);
+		dl->fd = ofd;
+		return ret;
+	}
+
+	if (posix_memalign(&buf, 512, 512) != 0)
+		return 1;
+	memset(buf, 0, 512);
+
+	lseek64(fd, dsize-512, 0);
+	rc = write(fd, buf, 512);
+	free(buf);
+	if (rc < 0)
+		return 1;
+	return 0;
+}
+
+static int compare_super_ddf(struct supertype *st, struct supertype *tst)
+{
+	/*
+	 * return:
+	 *  0 same, or first was empty, and second was copied
+	 *  1 second had wrong magic number - but that isn't possible
+	 *  2 wrong uuid
+	 *  3 wrong other info
+	 */
+	struct ddf_super *first = st->sb;
+	struct ddf_super *second = tst->sb;
+	struct dl *dl1, *dl2;
+	struct vcl *vl1, *vl2;
+	unsigned int max_vds, max_pds, pd, vd;
+
+	if (!first) {
+		st->sb = tst->sb;
+		tst->sb = NULL;
+		return 0;
+	}
+
+	if (memcmp(first->anchor.guid, second->anchor.guid, DDF_GUID_LEN) != 0)
+		return 2;
+
+	/* It is only OK to compare info in the anchor.  Anything else
+	 * could be changing due to a reconfig so must be ignored.
+	 * guid really should be enough anyway.
+	 */
+
+	if (!be32_eq(first->active->seq, second->active->seq)) {
+		dprintf("%s: sequence number mismatch %u<->%u\n", __func__,
+			be32_to_cpu(first->active->seq),
+			be32_to_cpu(second->active->seq));
+		return 0;
+	}
+
+	/*
+	 * At this point we are fairly sure that the meta data matches.
+	 * But the new disk may contain additional local data.
+	 * Add it to the super block.
+	 */
+	max_vds = be16_to_cpu(first->active->max_vd_entries);
+	max_pds = be16_to_cpu(first->phys->max_pdes);
+	for (vl2 = second->conflist; vl2; vl2 = vl2->next) {
+		for (vl1 = first->conflist; vl1; vl1 = vl1->next)
+			if (!memcmp(vl1->conf.guid, vl2->conf.guid,
+				    DDF_GUID_LEN))
+				break;
+		if (vl1) {
+			if (vl1->other_bvds != NULL &&
+			    vl1->conf.sec_elmnt_seq !=
+			    vl2->conf.sec_elmnt_seq) {
+				dprintf("%s: adding BVD %u\n", __func__,
+					vl2->conf.sec_elmnt_seq);
+				add_other_bvd(vl1, &vl2->conf,
+					      first->conf_rec_len*512);
+			}
+			continue;
+		}
+
+		if (posix_memalign((void **)&vl1, 512,
+				   (first->conf_rec_len*512 +
+				    offsetof(struct vcl, conf))) != 0) {
+			pr_err("%s could not allocate vcl buf\n",
+			       __func__);
+			return 3;
+		}
+
+		vl1->next = first->conflist;
+		vl1->block_sizes = NULL;
+		memcpy(&vl1->conf, &vl2->conf, first->conf_rec_len*512);
+		if (alloc_other_bvds(first, vl1) != 0) {
+			pr_err("%s could not allocate other bvds\n",
+			       __func__);
+			free(vl1);
+			return 3;
+		}
+		for (vd = 0; vd < max_vds; vd++)
+			if (!memcmp(first->virt->entries[vd].guid,
+				    vl1->conf.guid, DDF_GUID_LEN))
+				break;
+		vl1->vcnum = vd;
+		dprintf("%s: added config for VD %u\n", __func__, vl1->vcnum);
+		first->conflist = vl1;
+	}
+
+	for (dl2 = second->dlist; dl2; dl2 = dl2->next) {
+		for (dl1 = first->dlist; dl1; dl1 = dl1->next)
+			if (be32_eq(dl1->disk.refnum, dl2->disk.refnum))
+				break;
+		if (dl1)
+			continue;
+
+		if (posix_memalign((void **)&dl1, 512,
+		       sizeof(*dl1) + (first->max_part) * sizeof(dl1->vlist[0]))
+		    != 0) {
+			pr_err("%s could not allocate disk info buffer\n",
+			__func__);
+			return 3;
+		}
+		memcpy(dl1, dl2, sizeof(*dl1));
+		dl1->mdupdate = NULL;
+		dl1->next = first->dlist;
+		dl1->fd = -1;
+		for (pd = 0; pd < max_pds; pd++)
+			if (be32_eq(first->phys->entries[pd].refnum,
+				    dl1->disk.refnum))
+				break;
+		dl1->pdnum = pd < max_pds ? (int)pd : -1;
+		if (dl2->spare) {
+			if (posix_memalign((void **)&dl1->spare, 512,
+				       first->conf_rec_len*512) != 0) {
+				pr_err("%s could not allocate spare info buf\n",
+				       __func__);
+				return 3;
+			}
+			memcpy(dl1->spare, dl2->spare, first->conf_rec_len*512);
+		}
+		for (vd = 0 ; vd < first->max_part ; vd++) {
+			if (!dl2->vlist[vd]) {
+				dl1->vlist[vd] = NULL;
+				continue;
+			}
+			for (vl1 = first->conflist; vl1; vl1 = vl1->next) {
+				if (!memcmp(vl1->conf.guid,
+					    dl2->vlist[vd]->conf.guid,
+					    DDF_GUID_LEN))
+					break;
+				dl1->vlist[vd] = vl1;
+			}
+		}
+		first->dlist = dl1;
+		dprintf("%s: added disk %d: %08x\n", __func__, dl1->pdnum,
+			be32_to_cpu(dl1->disk.refnum));
+	}
+
+	return 0;
+}
+
+#ifndef MDASSEMBLE
+/*
+ * A new array 'a' has been started which claims to be instance 'inst'
+ * within container 'c'.
+ * We need to confirm that the array matches the metadata in 'c' so
+ * that we don't corrupt any metadata.
+ */
+static int ddf_open_new(struct supertype *c, struct active_array *a, char *inst)
+{
+	struct ddf_super *ddf = c->sb;
+	int n = atoi(inst);
+	struct mdinfo *dev;
+	struct dl *dl;
+	static const char faulty[] = "faulty";
+
+	if (all_ff(ddf->virt->entries[n].guid)) {
+		pr_err("%s: subarray %d doesn't exist\n", __func__, n);
+		return -ENODEV;
+	}
+	dprintf("%s: new subarray %d, GUID: %s\n", __func__, n,
+		guid_str(ddf->virt->entries[n].guid));
+	for (dev = a->info.devs; dev; dev = dev->next) {
+		for (dl = ddf->dlist; dl; dl = dl->next)
+			if (dl->major == dev->disk.major &&
+			    dl->minor == dev->disk.minor)
+				break;
+		if (!dl || dl->pdnum < 0) {
+			pr_err("%s: device %d/%d of subarray %d not found in meta data\n",
+				__func__, dev->disk.major, dev->disk.minor, n);
+			return -1;
+		}
+		if ((be16_to_cpu(ddf->phys->entries[dl->pdnum].state) &
+			(DDF_Online|DDF_Missing|DDF_Failed)) != DDF_Online) {
+			pr_err("%s: new subarray %d contains broken device %d/%d (%02x)\n",
+				__func__, n, dl->major, dl->minor,
+				be16_to_cpu(
+					ddf->phys->entries[dl->pdnum].state));
+			if (write(dev->state_fd, faulty, sizeof(faulty)-1) !=
+			    sizeof(faulty) - 1)
+				pr_err("Write to state_fd failed\n");
+			dev->curr_state = DS_FAULTY;
+		}
+	}
+	a->info.container_member = n;
+	return 0;
+}
+
+static void handle_missing(struct ddf_super *ddf, struct active_array *a, int inst)
+{
+	/* This member array is being activated.  If any devices
+	 * are missing they must now be marked as failed.
+	 */
+	struct vd_config *vc;
+	unsigned int n_bvd;
+	struct vcl *vcl;
+	struct dl *dl;
+	int pd;
+	int n;
+	int state;
+
+	for (n = 0; ; n++) {
+		vc = find_vdcr(ddf, inst, n, &n_bvd, &vcl);
+		if (!vc)
+			break;
+		for (dl = ddf->dlist; dl; dl = dl->next)
+			if (be32_eq(dl->disk.refnum, vc->phys_refnum[n_bvd]))
+				break;
+		if (dl)
+			/* Found this disk, so not missing */
+			continue;
+
+		/* Mark the device as failed/missing. */
+		pd = find_phys(ddf, vc->phys_refnum[n_bvd]);
+		if (pd >= 0 && be16_and(ddf->phys->entries[pd].state,
+					cpu_to_be16(DDF_Online))) {
+			be16_clear(ddf->phys->entries[pd].state,
+				   cpu_to_be16(DDF_Online));
+			be16_set(ddf->phys->entries[pd].state,
+				 cpu_to_be16(DDF_Failed|DDF_Missing));
+			vc->phys_refnum[n_bvd] = cpu_to_be32(0);
+			ddf_set_updates_pending(ddf, vc);
+		}
+
+		/* Mark the array as Degraded */
+		state = get_svd_state(ddf, vcl);
+		if (ddf->virt->entries[inst].state !=
+		    ((ddf->virt->entries[inst].state & ~DDF_state_mask)
+		     | state)) {
+			ddf->virt->entries[inst].state =
+				(ddf->virt->entries[inst].state & ~DDF_state_mask)
+				| state;
+			a->check_degraded = 1;
+			ddf_set_updates_pending(ddf, vc);
+		}
+	}
+}
+
+/*
+ * The array 'a' is to be marked clean in the metadata.
+ * If '->resync_start' is not ~(unsigned long long)0, then the array is only
+ * clean up to the point (in sectors).  If that cannot be recorded in the
+ * metadata, then leave it as dirty.
+ *
+ * For DDF, we need to clear the DDF_state_inconsistent bit in the
+ * !global! virtual_disk.virtual_entry structure.
+ */
+static int ddf_set_array_state(struct active_array *a, int consistent)
+{
+	struct ddf_super *ddf = a->container->sb;
+	int inst = a->info.container_member;
+	int old = ddf->virt->entries[inst].state;
+	if (consistent == 2) {
+		handle_missing(ddf, a, inst);
+		consistent = 1;
+		if (!is_resync_complete(&a->info))
+			consistent = 0;
+	}
+	if (consistent)
+		ddf->virt->entries[inst].state &= ~DDF_state_inconsistent;
+	else
+		ddf->virt->entries[inst].state |= DDF_state_inconsistent;
+	if (old != ddf->virt->entries[inst].state)
+		ddf_set_updates_pending(ddf, NULL);
+
+	old = ddf->virt->entries[inst].init_state;
+	ddf->virt->entries[inst].init_state &= ~DDF_initstate_mask;
+	if (is_resync_complete(&a->info))
+		ddf->virt->entries[inst].init_state |= DDF_init_full;
+	else if (a->info.resync_start == 0)
+		ddf->virt->entries[inst].init_state |= DDF_init_not;
+	else
+		ddf->virt->entries[inst].init_state |= DDF_init_quick;
+	if (old != ddf->virt->entries[inst].init_state)
+		ddf_set_updates_pending(ddf, NULL);
+
+	dprintf("ddf mark %d/%s (%d) %s %llu\n", inst,
+		guid_str(ddf->virt->entries[inst].guid), a->curr_state,
+		consistent?"clean":"dirty",
+		a->info.resync_start);
+	return consistent;
+}
+
+static int get_bvd_state(const struct ddf_super *ddf,
+			 const struct vd_config *vc)
+{
+	unsigned int i, n_bvd, working = 0;
+	unsigned int n_prim = be16_to_cpu(vc->prim_elmnt_count);
+	int pd, st, state;
+	char *avail = xcalloc(1, n_prim);
+	mdu_array_info_t array;
+
+	layout_ddf2md(vc, &array);
+
+	for (i = 0; i < n_prim; i++) {
+		if (!find_index_in_bvd(ddf, vc, i, &n_bvd))
+			continue;
+		pd = find_phys(ddf, vc->phys_refnum[n_bvd]);
+		if (pd < 0)
+			continue;
+		st = be16_to_cpu(ddf->phys->entries[pd].state);
+		if ((st & (DDF_Online|DDF_Failed|DDF_Rebuilding))
+		    == DDF_Online) {
+			working++;
+			avail[i] = 1;
+		}
+	}
+
+	state = DDF_state_degraded;
+	if (working == n_prim)
+		state = DDF_state_optimal;
+	else
+		switch (vc->prl) {
+		case DDF_RAID0:
+		case DDF_CONCAT:
+		case DDF_JBOD:
+			state = DDF_state_failed;
+			break;
+		case DDF_RAID1:
+			if (working == 0)
+				state = DDF_state_failed;
+			else if (working >= 2)
+				state = DDF_state_part_optimal;
+			break;
+		case DDF_RAID1E:
+			if (!enough(10, n_prim, array.layout, 1, avail))
+				state = DDF_state_failed;
+			break;
+		case DDF_RAID4:
+		case DDF_RAID5:
+			if (working < n_prim - 1)
+				state = DDF_state_failed;
+			break;
+		case DDF_RAID6:
+			if (working < n_prim - 2)
+				state = DDF_state_failed;
+			else if (working == n_prim - 1)
+				state = DDF_state_part_optimal;
+			break;
+		}
+	return state;
+}
+
+static int secondary_state(int state, int other, int seclevel)
+{
+	if (state == DDF_state_optimal && other == DDF_state_optimal)
+		return DDF_state_optimal;
+	if (seclevel == DDF_2MIRRORED) {
+		if (state == DDF_state_optimal || other == DDF_state_optimal)
+			return DDF_state_part_optimal;
+		if (state == DDF_state_failed && other == DDF_state_failed)
+			return DDF_state_failed;
+		return DDF_state_degraded;
+	} else {
+		if (state == DDF_state_failed || other == DDF_state_failed)
+			return DDF_state_failed;
+		if (state == DDF_state_degraded || other == DDF_state_degraded)
+			return DDF_state_degraded;
+		return DDF_state_part_optimal;
+	}
+}
+
+static int get_svd_state(const struct ddf_super *ddf, const struct vcl *vcl)
+{
+	int state = get_bvd_state(ddf, &vcl->conf);
+	unsigned int i;
+	for (i = 1; i < vcl->conf.sec_elmnt_count; i++) {
+		state = secondary_state(
+			state,
+			get_bvd_state(ddf, vcl->other_bvds[i-1]),
+			vcl->conf.srl);
+	}
+	return state;
+}
+
+/*
+ * The state of each disk is stored in the global phys_disk structure
+ * in phys_disk.entries[n].state.
+ * This makes various combinations awkward.
+ * - When a device fails in any array, it must be failed in all arrays
+ *   that include a part of this device.
+ * - When a component is rebuilding, we cannot include it officially in the
+ *   array unless this is the only array that uses the device.
+ *
+ * So: when transitioning:
+ *   Online -> failed,  just set failed flag.  monitor will propagate
+ *   spare -> online,   the device might need to be added to the array.
+ *   spare -> failed,   just set failed.  Don't worry if in array or not.
+ */
+static void ddf_set_disk(struct active_array *a, int n, int state)
+{
+	struct ddf_super *ddf = a->container->sb;
+	unsigned int inst = a->info.container_member, n_bvd;
+	struct vcl *vcl;
+	struct vd_config *vc = find_vdcr(ddf, inst, (unsigned int)n,
+					 &n_bvd, &vcl);
+	int pd;
+	struct mdinfo *mdi;
+	struct dl *dl;
+	int update = 0;
+
+	dprintf("%s: %d to %x\n", __func__, n, state);
+	if (vc == NULL) {
+		dprintf("ddf: cannot find instance %d!!\n", inst);
+		return;
+	}
+	/* Find the matching slot in 'info'. */
+	for (mdi = a->info.devs; mdi; mdi = mdi->next)
+		if (mdi->disk.raid_disk == n)
+			break;
+	if (!mdi) {
+		pr_err("%s: cannot find raid disk %d\n",
+		       __func__, n);
+		return;
+	}
+
+	/* and find the 'dl' entry corresponding to that. */
+	for (dl = ddf->dlist; dl; dl = dl->next)
+		if (mdi->state_fd >= 0 &&
+		    mdi->disk.major == dl->major &&
+		    mdi->disk.minor == dl->minor)
+			break;
+	if (!dl) {
+		pr_err("%s: cannot find raid disk %d (%d/%d)\n",
+		       __func__, n,
+		       mdi->disk.major, mdi->disk.minor);
+		return;
+	}
+
+	pd = find_phys(ddf, vc->phys_refnum[n_bvd]);
+	if (pd < 0 || pd != dl->pdnum) {
+		/* disk doesn't currently exist or has changed.
+		 * If it is now in_sync, insert it. */
+		dprintf("%s: phys disk not found for %d: %d/%d ref %08x\n",
+			__func__, dl->pdnum, dl->major, dl->minor,
+			be32_to_cpu(dl->disk.refnum));
+		dprintf("%s: array %u disk %u ref %08x pd %d\n",
+			__func__, inst, n_bvd,
+			be32_to_cpu(vc->phys_refnum[n_bvd]), pd);
+		if ((state & DS_INSYNC) && ! (state & DS_FAULTY) &&
+		    dl->pdnum >= 0) {
+			pd = dl->pdnum;
+			vc->phys_refnum[n_bvd] = dl->disk.refnum;
+			LBA_OFFSET(ddf, vc)[n_bvd] =
+				cpu_to_be64(mdi->data_offset);
+			be16_clear(ddf->phys->entries[pd].type,
+				   cpu_to_be16(DDF_Global_Spare));
+			be16_set(ddf->phys->entries[pd].type,
+				 cpu_to_be16(DDF_Active_in_VD));
+			update = 1;
+		}
+	} else {
+		be16 old = ddf->phys->entries[pd].state;
+		if (state & DS_FAULTY)
+			be16_set(ddf->phys->entries[pd].state,
+				 cpu_to_be16(DDF_Failed));
+		if (state & DS_INSYNC) {
+			be16_set(ddf->phys->entries[pd].state,
+				 cpu_to_be16(DDF_Online));
+			be16_clear(ddf->phys->entries[pd].state,
+				   cpu_to_be16(DDF_Rebuilding));
+		}
+		if (!be16_eq(old, ddf->phys->entries[pd].state))
+			update = 1;
+	}
+
+	dprintf("ddf: set_disk %d (%08x) to %x->%02x\n", n,
+		be32_to_cpu(dl->disk.refnum), state,
+		be16_to_cpu(ddf->phys->entries[pd].state));
+
+	/* Now we need to check the state of the array and update
+	 * virtual_disk.entries[n].state.
+	 * It needs to be one of "optimal", "degraded", "failed".
+	 * I don't understand 'deleted' or 'missing'.
+	 */
+	state = get_svd_state(ddf, vcl);
+
+	if (ddf->virt->entries[inst].state !=
+	    ((ddf->virt->entries[inst].state & ~DDF_state_mask)
+	     | state)) {
+		ddf->virt->entries[inst].state =
+			(ddf->virt->entries[inst].state & ~DDF_state_mask)
+			| state;
+		update = 1;
+	}
+	if (update)
+		ddf_set_updates_pending(ddf, vc);
+}
+
+static void ddf_sync_metadata(struct supertype *st)
+{
+	/*
+	 * Write all data to all devices.
+	 * Later, we might be able to track whether only local changes
+	 * have been made, or whether any global data has been changed,
+	 * but ddf is sufficiently weird that it probably always
+	 * changes global data ....
+	 */
+	struct ddf_super *ddf = st->sb;
+	if (!ddf->updates_pending)
+		return;
+	ddf->updates_pending = 0;
+	__write_init_super_ddf(st);
+	dprintf("ddf: sync_metadata\n");
+}
+
+static int del_from_conflist(struct vcl **list, const char *guid)
+{
+	struct vcl **p;
+	int found = 0;
+	for (p = list; p && *p; p = &((*p)->next))
+		if (!memcmp((*p)->conf.guid, guid, DDF_GUID_LEN)) {
+			found = 1;
+			*p = (*p)->next;
+		}
+	return found;
+}
+
+static int _kill_subarray_ddf(struct ddf_super *ddf, const char *guid)
+{
+	struct dl *dl;
+	unsigned int vdnum, i;
+	vdnum = find_vde_by_guid(ddf, guid);
+	if (vdnum == DDF_NOTFOUND) {
+		pr_err("%s: could not find VD %s\n", __func__,
+		       guid_str(guid));
+		return -1;
+	}
+	if (del_from_conflist(&ddf->conflist, guid) == 0) {
+		pr_err("%s: could not find conf %s\n", __func__,
+		       guid_str(guid));
+		return -1;
+	}
+	for (dl = ddf->dlist; dl; dl = dl->next)
+		for (i = 0; i < ddf->max_part; i++)
+			if (dl->vlist[i] != NULL &&
+			    !memcmp(dl->vlist[i]->conf.guid, guid,
+				    DDF_GUID_LEN))
+				dl->vlist[i] = NULL;
+	memset(ddf->virt->entries[vdnum].guid, 0xff, DDF_GUID_LEN);
+	dprintf("%s: deleted %s\n", __func__, guid_str(guid));
+	return 0;
+}
+
+static int kill_subarray_ddf(struct supertype *st)
+{
+	struct ddf_super *ddf = st->sb;
+	/*
+	 *  currentconf is set in container_content_ddf,
+	 *  called with subarray arg
+	 */
+	struct vcl *victim = ddf->currentconf;
+	struct vd_config *conf;
+	unsigned int vdnum;
+
+	ddf->currentconf = NULL;
+	if (!victim) {
+		pr_err("%s: nothing to kill\n", __func__);
+		return -1;
+	}
+	conf = &victim->conf;
+	vdnum = find_vde_by_guid(ddf, conf->guid);
+	if (vdnum == DDF_NOTFOUND) {
+		pr_err("%s: could not find VD %s\n", __func__,
+		       guid_str(conf->guid));
+		return -1;
+	}
+	if (st->update_tail) {
+		struct virtual_disk *vd;
+		int len = sizeof(struct virtual_disk)
+			+ sizeof(struct virtual_entry);
+		vd = xmalloc(len);
+		if (vd == NULL) {
+			pr_err("%s: failed to allocate %d bytes\n", __func__,
+			       len);
+			return -1;
+		}
+		memset(vd, 0 , len);
+		vd->magic = DDF_VIRT_RECORDS_MAGIC;
+		vd->populated_vdes = cpu_to_be16(0);
+		memcpy(vd->entries[0].guid, conf->guid, DDF_GUID_LEN);
+		/* we use DDF_state_deleted as marker */
+		vd->entries[0].state = DDF_state_deleted;
+		append_metadata_update(st, vd, len);
+	} else {
+		_kill_subarray_ddf(ddf, conf->guid);
+		ddf_set_updates_pending(ddf, NULL);
+		ddf_sync_metadata(st);
+	}
+	return 0;
+}
+
+static void copy_matching_bvd(struct ddf_super *ddf,
+			      struct vd_config *conf,
+			      const struct metadata_update *update)
+{
+	unsigned int mppe =
+		be16_to_cpu(ddf->anchor.max_primary_element_entries);
+	unsigned int len = ddf->conf_rec_len * 512;
+	char *p;
+	struct vd_config *vc;
+	for (p = update->buf; p < update->buf + update->len; p += len) {
+		vc = (struct vd_config *) p;
+		if (vc->sec_elmnt_seq == conf->sec_elmnt_seq) {
+			memcpy(conf->phys_refnum, vc->phys_refnum,
+			       mppe * (sizeof(__u32) + sizeof(__u64)));
+			return;
+		}
+	}
+	pr_err("%s: no match for BVD %d of %s in update\n", __func__,
+	       conf->sec_elmnt_seq, guid_str(conf->guid));
+}
+
+static void ddf_process_phys_update(struct supertype *st,
+				    struct metadata_update *update)
+{
+	struct ddf_super *ddf = st->sb;
+	struct phys_disk *pd;
+	unsigned int ent;
+
+	pd = (struct phys_disk*)update->buf;
+	ent = be16_to_cpu(pd->used_pdes);
+	if (ent >= be16_to_cpu(ddf->phys->max_pdes))
+		return;
+	if (be16_and(pd->entries[0].state, cpu_to_be16(DDF_Missing))) {
+		struct dl **dlp;
+		/* removing this disk. */
+		be16_set(ddf->phys->entries[ent].state,
+			 cpu_to_be16(DDF_Missing));
+		for (dlp = &ddf->dlist; *dlp; dlp = &(*dlp)->next) {
+			struct dl *dl = *dlp;
+			if (dl->pdnum == (signed)ent) {
+				close(dl->fd);
+				dl->fd = -1;
+				*dlp = dl->next;
+				update->space = dl->devname;
+				*(void**)dl = update->space_list;
+				update->space_list = (void**)dl;
+				break;
+			}
+		}
+		ddf_set_updates_pending(ddf, NULL);
+		return;
+	}
+	if (!all_ff(ddf->phys->entries[ent].guid))
+		return;
+	ddf->phys->entries[ent] = pd->entries[0];
+	ddf->phys->used_pdes = cpu_to_be16
+		(1 + be16_to_cpu(ddf->phys->used_pdes));
+	ddf_set_updates_pending(ddf, NULL);
+	if (ddf->add_list) {
+		struct active_array *a;
+		struct dl *al = ddf->add_list;
+		ddf->add_list = al->next;
+
+		al->next = ddf->dlist;
+		ddf->dlist = al;
+
+		/* As a device has been added, we should check
+		 * for any degraded devices that might make
+		 * use of this spare */
+		for (a = st->arrays ; a; a=a->next)
+			a->check_degraded = 1;
+	}
+}
+
+static void ddf_process_virt_update(struct supertype *st,
+				    struct metadata_update *update)
+{
+	struct ddf_super *ddf = st->sb;
+	struct virtual_disk *vd;
+	unsigned int ent;
+
+	vd = (struct virtual_disk*)update->buf;
+
+	if (vd->entries[0].state == DDF_state_deleted) {
+		if (_kill_subarray_ddf(ddf, vd->entries[0].guid))
+			return;
+	} else {
+		ent = find_vde_by_guid(ddf, vd->entries[0].guid);
+		if (ent != DDF_NOTFOUND) {
+			dprintf("%s: VD %s exists already in slot %d\n",
+				__func__, guid_str(vd->entries[0].guid),
+				ent);
+			return;
+		}
+		ent = find_unused_vde(ddf);
+		if (ent == DDF_NOTFOUND)
+			return;
+		ddf->virt->entries[ent] = vd->entries[0];
+		ddf->virt->populated_vdes =
+			cpu_to_be16(
+				1 + be16_to_cpu(
+					ddf->virt->populated_vdes));
+		dprintf("%s: added VD %s in slot %d(s=%02x i=%02x)\n",
+			__func__, guid_str(vd->entries[0].guid), ent,
+			ddf->virt->entries[ent].state,
+			ddf->virt->entries[ent].init_state);
+	}
+	ddf_set_updates_pending(ddf, NULL);
+}
+
+static void ddf_remove_failed(struct ddf_super *ddf)
+{
+	/* Now remove any 'Failed' devices that are not part
+	 * of any VD.  They will have the Transition flag set.
+	 * Once done, we need to update all dl->pdnum numbers.
+	 */
+	unsigned int pdnum;
+	unsigned int pd2 = 0;
+	struct dl *dl;
+
+	for (pdnum = 0; pdnum < be16_to_cpu(ddf->phys->max_pdes);
+	     pdnum++) {
+		if (be32_to_cpu(ddf->phys->entries[pdnum].refnum) ==
+		    0xFFFFFFFF)
+			continue;
+		if (be16_and(ddf->phys->entries[pdnum].state,
+			     cpu_to_be16(DDF_Failed))
+		    && be16_and(ddf->phys->entries[pdnum].state,
+				cpu_to_be16(DDF_Transition))) {
+			/* skip this one unless in dlist*/
+			for (dl = ddf->dlist; dl; dl = dl->next)
+				if (dl->pdnum == (int)pdnum)
+					break;
+			if (!dl)
+				continue;
+		}
+		if (pdnum == pd2)
+			pd2++;
+		else {
+			ddf->phys->entries[pd2] =
+				ddf->phys->entries[pdnum];
+			for (dl = ddf->dlist; dl; dl = dl->next)
+				if (dl->pdnum == (int)pdnum)
+					dl->pdnum = pd2;
+			pd2++;
+		}
+	}
+	ddf->phys->used_pdes = cpu_to_be16(pd2);
+	while (pd2 < pdnum) {
+		memset(ddf->phys->entries[pd2].guid, 0xff,
+		       DDF_GUID_LEN);
+		pd2++;
+	}
+}
+
+static void ddf_update_vlist(struct ddf_super *ddf, struct dl *dl)
+{
+	struct vcl *vcl;
+	unsigned int vn = 0;
+	int in_degraded = 0;
+
+	if (dl->pdnum < 0)
+		return;
+	for (vcl = ddf->conflist; vcl ; vcl = vcl->next) {
+		unsigned int dn, ibvd;
+		const struct vd_config *conf;
+		int vstate;
+		dn = get_pd_index_from_refnum(vcl,
+					      dl->disk.refnum,
+					      ddf->mppe,
+					      &conf, &ibvd);
+		if (dn == DDF_NOTFOUND)
+			continue;
+		dprintf("dev %d/%08x has %s (sec=%u) at %d\n",
+			dl->pdnum,
+			be32_to_cpu(dl->disk.refnum),
+			guid_str(conf->guid),
+			conf->sec_elmnt_seq, vn);
+		/* Clear the Transition flag */
+		if (be16_and
+		    (ddf->phys->entries[dl->pdnum].state,
+		     cpu_to_be16(DDF_Failed)))
+			be16_clear(ddf->phys
+				   ->entries[dl->pdnum].state,
+				   cpu_to_be16(DDF_Transition));
+		dl->vlist[vn++] = vcl;
+		vstate = ddf->virt->entries[vcl->vcnum].state
+			& DDF_state_mask;
+		if (vstate == DDF_state_degraded ||
+		    vstate == DDF_state_part_optimal)
+			in_degraded = 1;
+	}
+	while (vn < ddf->max_part)
+		dl->vlist[vn++] = NULL;
+	if (dl->vlist[0]) {
+		be16_clear(ddf->phys->entries[dl->pdnum].type,
+			   cpu_to_be16(DDF_Global_Spare));
+		if (!be16_and(ddf->phys
+			      ->entries[dl->pdnum].type,
+			      cpu_to_be16(DDF_Active_in_VD))) {
+			be16_set(ddf->phys
+				 ->entries[dl->pdnum].type,
+				 cpu_to_be16(DDF_Active_in_VD));
+			if (in_degraded)
+				be16_set(ddf->phys
+					 ->entries[dl->pdnum]
+					 .state,
+					 cpu_to_be16
+					 (DDF_Rebuilding));
+		}
+	}
+	if (dl->spare) {
+		be16_clear(ddf->phys->entries[dl->pdnum].type,
+			   cpu_to_be16(DDF_Global_Spare));
+		be16_set(ddf->phys->entries[dl->pdnum].type,
+			 cpu_to_be16(DDF_Spare));
+	}
+	if (!dl->vlist[0] && !dl->spare) {
+		be16_set(ddf->phys->entries[dl->pdnum].type,
+			 cpu_to_be16(DDF_Global_Spare));
+		be16_clear(ddf->phys->entries[dl->pdnum].type,
+			   cpu_to_be16(DDF_Spare));
+		be16_clear(ddf->phys->entries[dl->pdnum].type,
+			   cpu_to_be16(DDF_Active_in_VD));
+	}
+}
+
+static void ddf_process_conf_update(struct supertype *st,
+				    struct metadata_update *update)
+{
+	struct ddf_super *ddf = st->sb;
+	struct vd_config *vc;
+	struct vcl *vcl;
+	struct dl *dl;
+	unsigned int ent;
+	unsigned int pdnum, len;
+
+	vc = (struct vd_config*)update->buf;
+	len = ddf->conf_rec_len * 512;
+	if ((unsigned int)update->len != len * vc->sec_elmnt_count) {
+		pr_err("%s: %s: insufficient data (%d) for %u BVDs\n",
+		       __func__, guid_str(vc->guid), update->len,
+		       vc->sec_elmnt_count);
+		return;
+	}
+	for (vcl = ddf->conflist; vcl ; vcl = vcl->next)
+		if (memcmp(vcl->conf.guid, vc->guid, DDF_GUID_LEN) == 0)
+			break;
+	dprintf("%s: conf update for %s (%s)\n", __func__,
+		guid_str(vc->guid), (vcl ? "old" : "new"));
+	if (vcl) {
+		/* An update, just copy the phys_refnum and lba_offset
+		 * fields
+		 */
+		unsigned int i;
+		unsigned int k;
+		copy_matching_bvd(ddf, &vcl->conf, update);
+		for (k = 0; k < be16_to_cpu(vc->prim_elmnt_count); k++)
+			dprintf("BVD %u has %08x at %llu\n", 0,
+				be32_to_cpu(vcl->conf.phys_refnum[k]),
+				be64_to_cpu(LBA_OFFSET(ddf,
+						       &vcl->conf)[k]));
+		for (i = 1; i < vc->sec_elmnt_count; i++) {
+			copy_matching_bvd(ddf, vcl->other_bvds[i-1],
+					  update);
+			for (k = 0; k < be16_to_cpu(
+				     vc->prim_elmnt_count); k++)
+				dprintf("BVD %u has %08x at %llu\n", i,
+					be32_to_cpu
+					(vcl->other_bvds[i-1]->
+					 phys_refnum[k]),
+					be64_to_cpu
+					(LBA_OFFSET
+					 (ddf,
+					  vcl->other_bvds[i-1])[k]));
+		}
+	} else {
+		/* A new VD_CONF */
+		unsigned int i;
+		if (!update->space)
+			return;
+		vcl = update->space;
+		update->space = NULL;
+		vcl->next = ddf->conflist;
+		memcpy(&vcl->conf, vc, len);
+		ent = find_vde_by_guid(ddf, vc->guid);
+		if (ent == DDF_NOTFOUND)
+			return;
+		vcl->vcnum = ent;
+		ddf->conflist = vcl;
+		for (i = 1; i < vc->sec_elmnt_count; i++)
+			memcpy(vcl->other_bvds[i-1],
+			       update->buf + len * i, len);
+	}
+	/* Set DDF_Transition on all Failed devices - to help
+	 * us detect those that are no longer in use
+	 */
+	for (pdnum = 0; pdnum < be16_to_cpu(ddf->phys->max_pdes);
+	     pdnum++)
+		if (be16_and(ddf->phys->entries[pdnum].state,
+			     cpu_to_be16(DDF_Failed)))
+			be16_set(ddf->phys->entries[pdnum].state,
+				 cpu_to_be16(DDF_Transition));
+
+	/* Now make sure vlist is correct for each dl. */
+	for (dl = ddf->dlist; dl; dl = dl->next)
+		ddf_update_vlist(ddf, dl);
+	ddf_remove_failed(ddf);
+
+	ddf_set_updates_pending(ddf, vc);
+}
+
+static void ddf_process_update(struct supertype *st,
+			       struct metadata_update *update)
+{
+	/* Apply this update to the metadata.
+	 * The first 4 bytes are a DDF_*_MAGIC which guides
+	 * our actions.
+	 * Possible update are:
+	 *  DDF_PHYS_RECORDS_MAGIC
+	 *    Add a new physical device or remove an old one.
+	 *    Changes to this record only happen implicitly.
+	 *    used_pdes is the device number.
+	 *  DDF_VIRT_RECORDS_MAGIC
+	 *    Add a new VD.  Possibly also change the 'access' bits.
+	 *    populated_vdes is the entry number.
+	 *  DDF_VD_CONF_MAGIC
+	 *    New or updated VD.  the VIRT_RECORD must already
+	 *    exist.  For an update, phys_refnum and lba_offset
+	 *    (at least) are updated, and the VD_CONF must
+	 *    be written to precisely those devices listed with
+	 *    a phys_refnum.
+	 *  DDF_SPARE_ASSIGN_MAGIC
+	 *    replacement Spare Assignment Record... but for which device?
+	 *
+	 * So, e.g.:
+	 *  - to create a new array, we send a VIRT_RECORD and
+	 *    a VD_CONF.  Then assemble and start the array.
+	 *  - to activate a spare we send a VD_CONF to add the phys_refnum
+	 *    and offset.  This will also mark the spare as active with
+	 *    a spare-assignment record.
+	 */
+	be32 *magic = (be32 *)update->buf;
+
+	dprintf("Process update %x\n", be32_to_cpu(*magic));
+
+	if (be32_eq(*magic, DDF_PHYS_RECORDS_MAGIC)) {
+		if (update->len == (sizeof(struct phys_disk) +
+				    sizeof(struct phys_disk_entry)))
+			ddf_process_phys_update(st, update);
+	} else if (be32_eq(*magic, DDF_VIRT_RECORDS_MAGIC)) {
+		if (update->len == (sizeof(struct virtual_disk) +
+				    sizeof(struct virtual_entry)))
+			ddf_process_virt_update(st, update);
+	} else if (be32_eq(*magic, DDF_VD_CONF_MAGIC)) {
+		ddf_process_conf_update(st, update);
+	}
+	/* case DDF_SPARE_ASSIGN_MAGIC */
+}
+
+static int ddf_prepare_update(struct supertype *st,
+			      struct metadata_update *update)
+{
+	/* This update arrived at managemon.
+	 * We are about to pass it to monitor.
+	 * If a malloc is needed, do it here.
+	 */
+	struct ddf_super *ddf = st->sb;
+	be32 *magic;
+	if (update->len < 4)
+		return 0;
+	magic = (be32 *)update->buf;
+	if (be32_eq(*magic, DDF_VD_CONF_MAGIC)) {
+		struct vcl *vcl;
+		struct vd_config *conf;
+		if (update->len < (int)sizeof(*conf))
+			return 0;
+		conf = (struct vd_config *) update->buf;
+		if (posix_memalign(&update->space, 512,
+				   offsetof(struct vcl, conf)
+				   + ddf->conf_rec_len * 512) != 0) {
+			update->space = NULL;
+			return 0;
+		}
+		vcl = update->space;
+		vcl->conf.sec_elmnt_count = conf->sec_elmnt_count;
+		if (alloc_other_bvds(ddf, vcl) != 0) {
+			free(update->space);
+			update->space = NULL;
+			return 0;
+		}
+	}
+	return 1;
+}
+
+/*
+ * Check degraded state of a RAID10.
+ * returns 2 for good, 1 for degraded, 0 for failed, and -1 for error
+ */
+static int raid10_degraded(struct mdinfo *info)
+{
+	int n_prim, n_bvds;
+	int i;
+	struct mdinfo *d;
+	char *found;
+	int ret = -1;
+
+	n_prim = info->array.layout & ~0x100;
+	n_bvds = info->array.raid_disks / n_prim;
+	found = xmalloc(n_bvds);
+	if (found == NULL)
+		return ret;
+	memset(found, 0, n_bvds);
+	for (d = info->devs; d; d = d->next) {
+		i = d->disk.raid_disk / n_prim;
+		if (i >= n_bvds) {
+			pr_err("%s: BUG: invalid raid disk\n", __func__);
+			goto out;
+		}
+		if (d->state_fd > 0)
+			found[i]++;
+	}
+	ret = 2;
+	for (i = 0; i < n_bvds; i++)
+		if (!found[i]) {
+			dprintf("%s: BVD %d/%d failed\n", __func__, i, n_bvds);
+			ret = 0;
+			goto out;
+		} else if (found[i] < n_prim) {
+			dprintf("%s: BVD %d/%d degraded\n", __func__, i,
+				n_bvds);
+			ret = 1;
+		}
+out:
+	free(found);
+	return ret;
+}
+
+/*
+ * Check if the array 'a' is degraded but not failed.
+ * If it is, find as many spares as are available and needed and
+ * arrange for their inclusion.
+ * We only choose devices which are not already in the array,
+ * and prefer those with a spare-assignment to this array.
+ * Otherwise we choose global spares - assuming always that
+ * there is enough room.
+ * For each spare that we assign, we return an 'mdinfo' which
+ * describes the position for the device in the array.
+ * We also add to 'updates' a DDF_VD_CONF_MAGIC update with
+ * the new phys_refnum and lba_offset values.
+ *
+ * Only worry about BVDs at the moment.
+ */
+static struct mdinfo *ddf_activate_spare(struct active_array *a,
+					 struct metadata_update **updates)
+{
+	int working = 0;
+	struct mdinfo *d;
+	struct ddf_super *ddf = a->container->sb;
+	int global_ok = 0;
+	struct mdinfo *rv = NULL;
+	struct mdinfo *di;
+	struct metadata_update *mu;
+	struct dl *dl;
+	int i;
+	unsigned int j;
+	struct vcl *vcl;
+	struct vd_config *vc;
+	unsigned int n_bvd;
+
+	for (d = a->info.devs ; d ; d = d->next) {
+		if ((d->curr_state & DS_FAULTY) &&
+		    d->state_fd >= 0)
+			/* wait for Removal to happen */
+			return NULL;
+		if (d->state_fd >= 0)
+			working ++;
+	}
+
+	dprintf("%s: working=%d (%d) level=%d\n", __func__, working,
+		a->info.array.raid_disks,
+		a->info.array.level);
+	if (working == a->info.array.raid_disks)
+		return NULL; /* array not degraded */
+	switch (a->info.array.level) {
+	case 1:
+		if (working == 0)
+			return NULL; /* failed */
+		break;
+	case 4:
+	case 5:
+		if (working < a->info.array.raid_disks - 1)
+			return NULL; /* failed */
+		break;
+	case 6:
+		if (working < a->info.array.raid_disks - 2)
+			return NULL; /* failed */
+		break;
+	case 10:
+		if (raid10_degraded(&a->info) < 1)
+			return NULL;
+		break;
+	default: /* concat or stripe */
+		return NULL; /* failed */
+	}
+
+	/* For each slot, if it is not working, find a spare */
+	dl = ddf->dlist;
+	for (i = 0; i < a->info.array.raid_disks; i++) {
+		for (d = a->info.devs ; d ; d = d->next)
+			if (d->disk.raid_disk == i)
+				break;
+		dprintf("found %d: %p %x\n", i, d, d?d->curr_state:0);
+		if (d && (d->state_fd >= 0))
+			continue;
+
+		/* OK, this device needs recovery.  Find a spare */
+	again:
+		for ( ; dl ; dl = dl->next) {
+			unsigned long long esize;
+			unsigned long long pos;
+			struct mdinfo *d2;
+			int is_global = 0;
+			int is_dedicated = 0;
+			be16 state;
+
+			if (dl->pdnum < 0)
+				continue;
+			state = ddf->phys->entries[dl->pdnum].state;
+			if (be16_and(state,
+				     cpu_to_be16(DDF_Failed|DDF_Missing)) ||
+			    !be16_and(state,
+				      cpu_to_be16(DDF_Online)))
+				continue;
+
+			/* If in this array, skip */
+			for (d2 = a->info.devs ; d2 ; d2 = d2->next)
+				if (d2->state_fd >= 0 &&
+				    d2->disk.major == dl->major &&
+				    d2->disk.minor == dl->minor) {
+					dprintf("%x:%x (%08x) already in array\n",
+						dl->major, dl->minor,
+						be32_to_cpu(dl->disk.refnum));
+					break;
+				}
+			if (d2)
+				continue;
+			if (be16_and(ddf->phys->entries[dl->pdnum].type,
+				     cpu_to_be16(DDF_Spare))) {
+				/* Check spare assign record */
+				if (dl->spare) {
+					if (dl->spare->type & DDF_spare_dedicated) {
+						/* check spare_ents for guid */
+						unsigned int j;
+						for (j = 0 ;
+						     j < be16_to_cpu
+							     (dl->spare
+							      ->populated);
+						     j++) {
+							if (memcmp(dl->spare->spare_ents[j].guid,
+								   ddf->virt->entries[a->info.container_member].guid,
+								   DDF_GUID_LEN) == 0)
+								is_dedicated = 1;
+						}
+					} else
+						is_global = 1;
+				}
+			} else if (be16_and(ddf->phys->entries[dl->pdnum].type,
+					    cpu_to_be16(DDF_Global_Spare))) {
+				is_global = 1;
+			} else if (!be16_and(ddf->phys
+					     ->entries[dl->pdnum].state,
+					     cpu_to_be16(DDF_Failed))) {
+				/* we can possibly use some of this */
+				is_global = 1;
+			}
+			if ( ! (is_dedicated ||
+				(is_global && global_ok))) {
+				dprintf("%x:%x not suitable: %d %d\n", dl->major, dl->minor,
+					is_dedicated, is_global);
+				continue;
+			}
+
+			/* We are allowed to use this device - is there space?
+			 * We need a->info.component_size sectors */
+			esize = a->info.component_size;
+			pos = find_space(ddf, dl, INVALID_SECTORS, &esize);
+
+			if (esize < a->info.component_size) {
+				dprintf("%x:%x has no room: %llu %llu\n",
+					dl->major, dl->minor,
+					esize, a->info.component_size);
+				/* No room */
+				continue;
+			}
+
+			/* Cool, we have a device with some space at pos */
+			di = xcalloc(1, sizeof(*di));
+			di->disk.number = i;
+			di->disk.raid_disk = i;
+			di->disk.major = dl->major;
+			di->disk.minor = dl->minor;
+			di->disk.state = 0;
+			di->recovery_start = 0;
+			di->data_offset = pos;
+			di->component_size = a->info.component_size;
+			di->next = rv;
+			rv = di;
+			dprintf("%x:%x (%08x) to be %d at %llu\n",
+				dl->major, dl->minor,
+				be32_to_cpu(dl->disk.refnum), i, pos);
+
+			break;
+		}
+		if (!dl && ! global_ok) {
+			/* not enough dedicated spares, try global */
+			global_ok = 1;
+			dl = ddf->dlist;
+			goto again;
+		}
+	}
+
+	if (!rv)
+		/* No spares found */
+		return rv;
+	/* Now 'rv' has a list of devices to return.
+	 * Create a metadata_update record to update the
+	 * phys_refnum and lba_offset values
+	 */
+	vc = find_vdcr(ddf, a->info.container_member, rv->disk.raid_disk,
+		       &n_bvd, &vcl);
+	if (vc == NULL)
+		return NULL;
+
+	mu = xmalloc(sizeof(*mu));
+	if (posix_memalign(&mu->space, 512, sizeof(struct vcl)) != 0) {
+		free(mu);
+		mu = NULL;
+	}
+
+	mu->len = ddf->conf_rec_len * 512 * vcl->conf.sec_elmnt_count;
+	mu->buf = xmalloc(mu->len);
+	mu->space = NULL;
+	mu->space_list = NULL;
+	mu->next = *updates;
+	memcpy(mu->buf, &vcl->conf, ddf->conf_rec_len * 512);
+	for (j = 1; j < vcl->conf.sec_elmnt_count; j++)
+		memcpy(mu->buf + j * ddf->conf_rec_len * 512,
+		       vcl->other_bvds[j-1], ddf->conf_rec_len * 512);
+
+	vc = (struct vd_config*)mu->buf;
+	for (di = rv ; di ; di = di->next) {
+		unsigned int i_sec, i_prim;
+		i_sec = di->disk.raid_disk
+			/ be16_to_cpu(vcl->conf.prim_elmnt_count);
+		i_prim = di->disk.raid_disk
+			% be16_to_cpu(vcl->conf.prim_elmnt_count);
+		vc = (struct vd_config *)(mu->buf
+					  + i_sec * ddf->conf_rec_len * 512);
+		for (dl = ddf->dlist; dl; dl = dl->next)
+			if (dl->major == di->disk.major
+			    && dl->minor == di->disk.minor)
+				break;
+		if (!dl || dl->pdnum < 0) {
+			pr_err("%s: BUG: can't find disk %d (%d/%d)\n",
+			       __func__, di->disk.raid_disk,
+			       di->disk.major, di->disk.minor);
+			return NULL;
+		}
+		vc->phys_refnum[i_prim] = ddf->phys->entries[dl->pdnum].refnum;
+		LBA_OFFSET(ddf, vc)[i_prim] = cpu_to_be64(di->data_offset);
+		dprintf("BVD %u gets %u: %08x at %llu\n", i_sec, i_prim,
+			be32_to_cpu(vc->phys_refnum[i_prim]),
+			be64_to_cpu(LBA_OFFSET(ddf, vc)[i_prim]));
+	}
+	*updates = mu;
+	return rv;
+}
+#endif /* MDASSEMBLE */
+
+static int ddf_level_to_layout(int level)
+{
+	switch(level) {
+	case 0:
+	case 1:
+		return 0;
+	case 5:
+		return ALGORITHM_LEFT_SYMMETRIC;
+	case 6:
+		return ALGORITHM_ROTATING_N_CONTINUE;
+	case 10:
+		return 0x102;
+	default:
+		return UnSet;
+	}
+}
+
+static void default_geometry_ddf(struct supertype *st, int *level, int *layout, int *chunk)
+{
+	if (level && *level == UnSet)
+		*level = LEVEL_CONTAINER;
+
+	if (level && layout && *layout == UnSet)
+		*layout = ddf_level_to_layout(*level);
+}
+
+struct superswitch super_ddf = {
+#ifndef	MDASSEMBLE
+	.examine_super	= examine_super_ddf,
+	.brief_examine_super = brief_examine_super_ddf,
+	.brief_examine_subarrays = brief_examine_subarrays_ddf,
+	.export_examine_super = export_examine_super_ddf,
+	.detail_super	= detail_super_ddf,
+	.brief_detail_super = brief_detail_super_ddf,
+	.validate_geometry = validate_geometry_ddf,
+	.write_init_super = write_init_super_ddf,
+	.add_to_super	= add_to_super_ddf,
+	.remove_from_super = remove_from_super_ddf,
+	.load_container	= load_container_ddf,
+	.copy_metadata = copy_metadata_ddf,
+	.kill_subarray  = kill_subarray_ddf,
+#endif
+	.match_home	= match_home_ddf,
+	.uuid_from_super= uuid_from_super_ddf,
+	.getinfo_super  = getinfo_super_ddf,
+	.update_super	= update_super_ddf,
+
+	.avail_size	= avail_size_ddf,
+
+	.compare_super	= compare_super_ddf,
+
+	.load_super	= load_super_ddf,
+	.init_super	= init_super_ddf,
+	.store_super	= store_super_ddf,
+	.free_super	= free_super_ddf,
+	.match_metadata_desc = match_metadata_desc_ddf,
+	.container_content = container_content_ddf,
+	.default_geometry = default_geometry_ddf,
+
+	.external	= 1,
+
+#ifndef MDASSEMBLE
+/* for mdmon */
+	.open_new       = ddf_open_new,
+	.set_array_state= ddf_set_array_state,
+	.set_disk       = ddf_set_disk,
+	.sync_metadata  = ddf_sync_metadata,
+	.process_update	= ddf_process_update,
+	.prepare_update	= ddf_prepare_update,
+	.activate_spare = ddf_activate_spare,
+#endif
+	.name = "ddf",
+};