1 files changed, 254 insertions, 411 deletions

diff --git a/ubi-utils/src/libubigen.c b/ubi-utils/src/libubigen.c
index 1793009..91bb274 100644
--- a/ubi-utils/src/libubigen.c
+++ b/ubi-utils/src/libubigen.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) International Business Machines Corp., 2006
+ * Copyright (C) 2008 Nokia Corporation
  *
  * 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
@@ -14,474 +15,316 @@
  * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * Generating UBI images.
  *
- * Author: Oliver Lohmann
- *
- * Add UBI headers to binary data.
+ * Authors: Oliver Lohmann
+ *          Artem Bityutskiy
  */
 
 #include <stdlib.h>
 #include <stdint.h>
-#include <stdio.h>
-#include <errno.h>
+#include <unistd.h>
 #include <string.h>
+
 #include <mtd/ubi-media.h>
 #include <mtd_swab.h>
-
-#include "config.h"
-#include "ubigen.h"
+#include <libubigen.h>
 #include "crc32.h"
-
-#define UBI_NAME_SIZE		256
-#define DEFAULT_VID_OFFSET	((DEFAULT_PAGESIZE) - (UBI_VID_HDR_SIZE))
-#define MIN(a,b)		((a) < (b) ? (a) : (b))
-
-static uint32_t crc32_table[256];
-
-struct ubi_info {
-	struct ubi_vid_hdr* v;	/* Volume ID header */
-	struct ubi_ec_hdr* ec;	/* Erase count header */
-
-	FILE* fp_in;		/* Input Stream */
-	FILE* fp_out;		/* Output stream */
-
-	size_t eb_size;		/* Physical EB size in bytes */
-	size_t leb_size;	/* Size of a logical EB in a physical EB */
-	size_t leb_total;	/* Total input size in logical EB */
-	size_t alignment;	/* Block alignment */
-	size_t data_pad;	/* Size of padding in each physical EB */
-
-	size_t bytes_total;	/* Total input size in bytes */
-	size_t bytes_read;	/* Nymber of read bytes (total) */
-
-	uint32_t blks_written;	/* Number of written logical EB */
-
-	uint8_t* buf;		/* Allocated buffer */
-	uint8_t* ptr_ec_hdr;	/* Pointer to EC hdr in buf */
-	uint8_t* ptr_vid_hdr;	/* Pointer to VID hdr in buf */
-	uint8_t* ptr_data;	/* Pointer to data region in buf */
-};
-
-
-static uint32_t
-byte_to_blk(uint64_t byte, uint32_t eb_size)
-{
-	return (byte % eb_size) == 0
-		? (byte / eb_size)
-		: (byte / eb_size) + 1;
-}
-
-static int
-validate_ubi_info(ubi_info_t u)
-{
-	if ((u->v->vol_type != UBI_VID_DYNAMIC) &&
-	    (u->v->vol_type != UBI_VID_STATIC)) {
-		return EUBIGEN_INVALID_TYPE;
-	}
-
-	if (be32_to_cpu(u->ec->vid_hdr_offset) < UBI_VID_HDR_SIZE) {
-		return EUBIGEN_INVALID_HDR_OFFSET;
-	}
-
-	return 0;
-}
-
-static int
-skip_blks(ubi_info_t u, uint32_t blks)
-{
-	uint32_t i;
-	size_t read = 0, to_read = 0;
-
-	/* Step to a maximum of leb_total - 1 to keep the
-	   restrictions. */
-	for (i = 0; i < MIN(blks, u->leb_total-1); i++) {
-		/* Read in data */
-		to_read = MIN(u->leb_size,
-			      (u->bytes_total - u->bytes_read));
-		read = fread(u->ptr_data, 1, to_read, u->fp_in);
-		if (read != to_read) {
-			return -EIO;
-		}
-		u->bytes_read += read;
-		u->blks_written++;
-	}
-
-	return 0;
-}
-
-static void
-clear_buf(ubi_info_t u)
-{
-	memset(u->buf, 0xff, u->eb_size);
-}
-
-static void
-write_ec_hdr(ubi_info_t u)
-{
-	memcpy(u->ptr_ec_hdr, u->ec, UBI_EC_HDR_SIZE);
-}
-
-static int
-fill_data_buffer_from_file(ubi_info_t u, size_t* read)
-{
-	size_t to_read = 0;
-
-	if (u-> fp_in == NULL)
-		return -EIO;
-
-	to_read = MIN(u->leb_size, (u->bytes_total - u->bytes_read));
-	*read = fread(u->ptr_data, 1, to_read, u->fp_in);
-	if (*read != to_read) {
-		return -EIO;
-	}
-	return 0;
-}
-
-static void
-add_static_info(ubi_info_t u, size_t data_size, ubigen_action_t action)
-{
-	uint32_t crc = clc_crc32(crc32_table, UBI_CRC32_INIT,
-				 u->ptr_data, data_size);
-
-	u->v->data_size = cpu_to_be32(data_size);
-	u->v->data_crc = cpu_to_be32(crc);
-
-	if (action & BROKEN_DATA_CRC) {
-		u->v->data_crc =
-			cpu_to_be32(be32_to_cpu(u->v->data_crc) + 1);
-	}
-	if (action & BROKEN_DATA_SIZE) {
-		u->v->data_size =
-			cpu_to_be32(be32_to_cpu(u->v->data_size) + 1);
-	}
-}
-
-static void
-write_vid_hdr(ubi_info_t u, ubigen_action_t action)
+#include "common.h"
+
+#define PROGRAM_NAME "libubigen"
+
+/**
+ * ubigen_info_init - initialize libubigen.
+ * @ui: libubigen information
+ * @peb_size: flash physical eraseblock size
+ * @min_io_size: flash minimum input/output unit size
+ * @subpage_size: flash sub-page, if present (has to be equivalent to
+ *                @min_io_size if does not exist)
+ * @vid_hdr_offs: offset of the VID header
+ * @ubi_ver: UBI version
+ */
+void ubigen_info_init(struct ubigen_info *ui, int peb_size, int min_io_size,
+		      int subpage_size, int vid_hdr_offs, int ubi_ver)
 {
-	uint32_t crc = clc_crc32(crc32_table, UBI_CRC32_INIT,
-				 u->v, UBI_VID_HDR_SIZE_CRC);
-	/* Write VID header */
-	u->v->hdr_crc = cpu_to_be32(crc);
-	if (action & BROKEN_HDR_CRC) {
-		u->v->hdr_crc = cpu_to_be32(be32_to_cpu(u->v->hdr_crc) + 1);
+	if (!vid_hdr_offs) {
+		vid_hdr_offs = UBI_EC_HDR_SIZE + subpage_size - 1;
+		vid_hdr_offs /= subpage_size;
+		vid_hdr_offs *= subpage_size;
 	}
-	memcpy(u->ptr_vid_hdr, u->v, UBI_VID_HDR_SIZE);
-}
 
-static int
-write_to_output_stream(ubi_info_t u)
-{
-	size_t written;
-
-	written = fwrite(u->buf, 1, u->eb_size, u->fp_out);
-	if (written != u->eb_size) {
-		return -EIO;
-	}
-	return 0;
+	ui->peb_size = peb_size;
+	ui->min_io_size = min_io_size;
+	ui->vid_hdr_offs = vid_hdr_offs;
+	ui->data_offs = vid_hdr_offs + UBI_VID_HDR_SIZE + min_io_size - 1;
+	ui->data_offs /= min_io_size;
+	ui->data_offs *= min_io_size;
+	ui->leb_size = peb_size - ui->data_offs;
+	ui->ubi_ver = ubi_ver;
+
+	ui->max_volumes = ui->leb_size / UBI_VTBL_RECORD_SIZE;
+	if (ui->max_volumes > UBI_MAX_VOLUMES)
+		ui->max_volumes = UBI_MAX_VOLUMES;
+	ui->vtbl_size = ui->max_volumes * UBI_VTBL_RECORD_SIZE;
 }
 
-int
-ubigen_write_leb(ubi_info_t u, ubigen_action_t action)
+/**
+ * ubigen_create_empty_vtbl - creates empty volume table.
+ *
+ * This function creates an empty volume table and returns a pointer to it in
+ * case of success and %NULL in case of failure. The returned object has to be
+ * freed with 'free()' call.
+ */
+struct ubi_vtbl_record *ubigen_create_empty_vtbl(const struct ubigen_info *ui)
 {
-	int rc = 0;
-	size_t read = 0;
-
-	clear_buf(u);
-	write_ec_hdr(u);
+	struct ubi_vtbl_record *vtbl;
+	int i;
 
-	rc = fill_data_buffer_from_file(u, &read);
-	if (rc != 0)
-		return rc;
-
-	if (u->v->vol_type == UBI_VID_STATIC)  {
-		add_static_info(u, read, action);
+	vtbl = calloc(1, ui->vtbl_size);
+	if (!vtbl) {
+		sys_errmsg("cannot allocate %d bytes of memory", ui->vtbl_size);
+		return NULL;
 	}
 
-	u->v->lnum = cpu_to_be32(u->blks_written);
-
-	if (action & MARK_AS_UPDATE) {
-		u->v->copy_flag = (u->v->copy_flag)++;
+	for (i = 0; i < ui->max_volumes; i++) {
+		uint32_t crc = crc32(UBI_CRC32_INIT, &vtbl[i],
+				     UBI_VTBL_RECORD_SIZE_CRC);
+		vtbl[i].crc = cpu_to_be32(crc);
 	}
 
-	write_vid_hdr(u, action);
-	rc = write_to_output_stream(u);
-	if (rc != 0)
-		return rc;
-
-	/* Update current handle */
-	u->bytes_read += read;
-	u->blks_written++;
-	return 0;
+	return vtbl;
 }
 
-int
-ubigen_write_complete(ubi_info_t u)
+/**
+ * ubigen_add_volume - add a volume to the volume table.
+ * @ui: libubigen information
+ * @vi: volume information
+ * @vtbl: volume table to add to
+ *
+ * This function adds volume described by input parameters to the volume table
+ * @vtbl.
+ */
+int ubigen_add_volume(const struct ubigen_info *ui,
+		      const struct ubigen_vol_info *vi,
+		      struct ubi_vtbl_record *vtbl)
 {
-	size_t i;
-	int rc = 0;
-
-	for (i = 0; i < u->leb_total; i++) {
-		rc = ubigen_write_leb(u,  NO_ERROR);
-		if (rc != 0)
-			return rc;
-	}
-
+	struct ubi_vtbl_record *vtbl_rec = &vtbl[vi->id];
+	uint32_t tmp;
+
+	if (vi->id >= ui->max_volumes)
+		return errmsg("too high volume id %d, max. volumes is %d",
+			      vi->id, ui->max_volumes);
+
+	if (vi->alignment >= ui->leb_size)
+		return errmsg("too large alignment %d, max is %d (LEB size)",
+			      vi->alignment, ui->leb_size);
+
+	memset(vtbl_rec, '\0', sizeof(struct ubi_vtbl_record));
+	tmp = (vi->bytes + ui->leb_size - 1) / ui->leb_size;
+	vtbl_rec->reserved_pebs = cpu_to_be32(tmp);
+	vtbl_rec->alignment = cpu_to_be32(vi->alignment);
+	vtbl_rec->vol_type = vi->type;
+	tmp = ui->leb_size % vi->alignment;
+	vtbl_rec->data_pad = cpu_to_be32(tmp);
+	vtbl_rec->flags = vi->flags;
+
+	memcpy(vtbl_rec->name, vi->name, vi->name_len);
+	vtbl_rec->name[vi->name_len] = '\0';
+	vtbl_rec->name_len = cpu_to_be16(vi->name_len);
+
+	tmp = crc32(UBI_CRC32_INIT, vtbl_rec, UBI_VTBL_RECORD_SIZE_CRC);
+	vtbl_rec->crc =	 cpu_to_be32(tmp);
 	return 0;
 }
 
-int
-ubigen_write_broken_update(ubi_info_t u, uint32_t blk)
+/**
+ * ubigen_init_ec_hdr - initialize EC header.
+ * @ui: libubigen information
+ * @hdr: the EC header to initialize
+ * @ec: erase counter value
+ */
+void ubigen_init_ec_hdr(const struct ubigen_info *ui,
+		        struct ubi_ec_hdr *hdr, long long ec)
 {
-	int rc = 0;
+	uint32_t crc;
 
-	rc = skip_blks(u, blk);
-	if (rc != 0)
-		return rc;
+	memset(hdr, '\0', sizeof(struct ubi_ec_hdr));
 
-	rc = ubigen_write_leb(u, MARK_AS_UPDATE | BROKEN_DATA_CRC);
-	if (rc != 0)
-		return rc;
+	hdr->magic = cpu_to_be32(UBI_EC_HDR_MAGIC);
+	hdr->version = ui->ubi_ver;
+	hdr->ec = cpu_to_be64(ec);
+	hdr->vid_hdr_offset = cpu_to_be32(ui->vid_hdr_offs);
 
+	hdr->data_offset = cpu_to_be32(ui->data_offs);
 
-	return 0;
+	crc = crc32(UBI_CRC32_INIT, hdr, UBI_EC_HDR_SIZE_CRC);
+	hdr->hdr_crc = cpu_to_be32(crc);
 }
 
-void
-dump_info(ubi_info_t u ubi_unused)
+/**
+ * init_vid_hdr - initialize VID header.
+ * @ui: libubigen information
+ * @vi: volume information
+ * @hdr: the VID header to initialize
+ * @lnum: logical eraseblock number
+ * @data: the contents of the LEB (static volumes only)
+ * @data_size: amount of data in this LEB (static volumes only)
+ *
+ * Note, @used_ebs, @data and @data_size are ignored in case of dynamic
+ * volumes.
+ */
+static void init_vid_hdr(const struct ubigen_info *ui,
+			 const struct ubigen_vol_info *vi,
+			 struct ubi_vid_hdr *hdr, int lnum,
+			 const void *data, int data_size)
 {
-#ifdef DEBUG
-	int err = 0;
-	if (!u) {
-		fprintf(stderr, "<empty>");
-		return;
-	}
-	if (!u->ec) {
-		fprintf(stderr, "<ec-empty>");
-		err = 1;
-	}
-	if (!u->v) {
-		fprintf(stderr, "<v-empty>");
-		err = 1;
-	}
-	if (err) return;
-
-	fprintf(stderr, "ubi volume\n");
-	fprintf(stderr, "version      :	  %8d\n", u->v->version);
-	fprintf(stderr, "vol_id	      :	  %8d\n", be32_to_cpu(u->v->vol_id));
-	fprintf(stderr, "vol_type     :	  %8s\n",
-		u->v->vol_type == UBI_VID_STATIC ?
-		"static" : "dynamic");
-	fprintf(stderr, "used_ebs     :	  %8d\n",
-		be32_to_cpu(u->v->used_ebs));
-	fprintf(stderr, "eb_size      : 0x%08x\n", u->eb_size);
-	fprintf(stderr, "leb_size     : 0x%08x\n", u->leb_size);
-	fprintf(stderr, "data_pad     : 0x%08x\n",
-		be32_to_cpu(u->v->data_pad));
-	fprintf(stderr, "leb_total    :	  %8d\n", u->leb_total);
-	fprintf(stderr, "header offs  : 0x%08x\n",
-		be32_to_cpu(u->ec->vid_hdr_offset));
-	fprintf(stderr, "bytes_total  :	  %8d\n", u->bytes_total);
-	fprintf(stderr, "  +  in MiB  : %8.2f M\n",
-		((float)(u->bytes_total)) / 1024 / 1024);
-	fprintf(stderr, "-------------------------------\n\n");
-#else
-	return;
-#endif
-}
+	uint32_t crc;
 
-int
-ubigen_destroy(ubi_info_t *u)
-{
-	if (u == NULL)
-		return -EINVAL;
-
-	ubi_info_t tmp = *u;
-
-	if (tmp) {
-		if (tmp->v)
-			free(tmp->v);
-		if (tmp->ec)
-			free(tmp->ec);
-		if (tmp->buf)
-			free(tmp->buf);
-		free(tmp);
+	memset(hdr, '\0', sizeof(struct ubi_vid_hdr));
+
+	hdr->magic = cpu_to_be32(UBI_VID_HDR_MAGIC);
+	hdr->version = ui->ubi_ver;
+	hdr->vol_type = vi->type;
+	hdr->vol_id = cpu_to_be32(vi->id);
+	hdr->lnum = cpu_to_be32(lnum);
+	hdr->data_pad = cpu_to_be32(vi->data_pad);
+	hdr->compat = vi->compat;
+
+	if (vi->type == UBI_VID_STATIC) {
+		hdr->data_size = cpu_to_be32(data_size);
+		hdr->used_ebs = cpu_to_be32(vi->used_ebs);
+		crc = crc32(UBI_CRC32_INIT, data, data_size);
+		hdr->data_crc = cpu_to_be32(crc);
 	}
-	*u = NULL;
-	return 0;
-}
 
-void
-ubigen_init(void)
-{
-	init_crc32_table(crc32_table);
+	crc = crc32(UBI_CRC32_INIT, hdr, UBI_VID_HDR_SIZE_CRC);
+	hdr->hdr_crc = cpu_to_be32(crc);
 }
 
-int
-ubigen_create(ubi_info_t* u, uint32_t vol_id, uint8_t vol_type,
-	      uint32_t eb_size, uint64_t ec, uint32_t alignment,
-	      uint8_t version, uint32_t vid_hdr_offset, uint8_t compat_flag,
-	      size_t data_size, FILE* fp_in, FILE* fp_out)
+/**
+ * ubigen_write_volume - write UBI volume.
+ * @ui: libubigen information
+ * @vi: volume information
+ * @ec: erase coutner value to put to EC headers
+ * @bytes: volume size in bytes
+ * @in: input file descriptor (has to be properly seeked)
+ * @out: output file descriptor
+ *
+ * This function reads the contents of the volume from the input file @in and
+ * writes the UBI volume to the output file @out. Returns zero on success and
+ * %-1 on failure.
+ */
+int ubigen_write_volume(const struct ubigen_info *ui,
+			const struct ubigen_vol_info *vi, long long ec,
+			long long bytes, int in, int out)
 {
-	int rc = 0;
-	ubi_info_t res = NULL;
-	uint32_t crc;
-	uint32_t data_offset;
+	int len = vi->usable_leb_size, rd, lnum = 0;
+	char inbuf[ui->leb_size], outbuf[ui->peb_size];
 
-	if (alignment == 0) {
-		rc = EUBIGEN_INVALID_ALIGNMENT;
-		goto ubigen_create_err;
-	}
-	if ((fp_in == NULL) || (fp_out == NULL)) {
-		rc = -EINVAL;
-		goto ubigen_create_err;
-	}
+	if (vi->id >= ui->max_volumes)
+		return errmsg("too high volume id %d, max. volumes is %d",
+			      vi->id, ui->max_volumes);
 
-	res = (ubi_info_t) calloc(1, sizeof(struct ubi_info));
-	if (res == NULL) {
-		rc = -ENOMEM;
-		goto ubigen_create_err;
-	}
+	if (vi->alignment >= ui->leb_size)
+		return errmsg("too large alignment %d, max is %d (LEB size)",
+			      vi->alignment, ui->leb_size);
 
-	res->v = (struct ubi_vid_hdr*) calloc(1, sizeof(struct ubi_vid_hdr));
-	if (res->v == NULL) {
-		rc = -ENOMEM;
-		goto ubigen_create_err;
-	}
+	memset(outbuf, 0xFF, ui->data_offs);
+	ubigen_init_ec_hdr(ui, (struct ubi_ec_hdr *)outbuf, ec);
 
-	res->ec = (struct ubi_ec_hdr*) calloc(1, sizeof(struct ubi_ec_hdr));
-	if (res->ec == NULL) {
-		rc = -ENOMEM;
-		goto ubigen_create_err;
-	}
+	while (bytes) {
+		int l;
+		struct ubi_vid_hdr *vid_hdr;
 
-	/* data which is needed in the general process */
-	vid_hdr_offset = vid_hdr_offset ? vid_hdr_offset : DEFAULT_VID_OFFSET;
-	data_offset = vid_hdr_offset + UBI_VID_HDR_SIZE;
-	res->bytes_total = data_size;
-	res->eb_size = eb_size ? eb_size : DEFAULT_BLOCKSIZE;
-	res->data_pad = (res->eb_size - data_offset) % alignment;
-	res->leb_size = res->eb_size - data_offset - res->data_pad;
-	res->leb_total = byte_to_blk(data_size, res->leb_size);
-	res->alignment = alignment;
-
-	if ((res->eb_size < (vid_hdr_offset + UBI_VID_HDR_SIZE))) {
-		rc = EUBIGEN_TOO_SMALL_EB;
-		goto ubigen_create_err;
-	}
-	res->fp_in = fp_in;
-	res->fp_out = fp_out;
-
-	/* vid hdr data which doesn't change */
-	res->v->magic = cpu_to_be32(UBI_VID_HDR_MAGIC);
-	res->v->version = version ? version : UBI_VERSION;
-	res->v->vol_type = vol_type;
-	res->v->vol_id = cpu_to_be32(vol_id);
-	res->v->compat = compat_flag;
-	res->v->data_pad = cpu_to_be32(res->data_pad);
-
-	/* static only: used_ebs */
-	if (res->v->vol_type == UBI_VID_STATIC) {
-		res->v->used_ebs = cpu_to_be32(byte_to_blk
-						(res->bytes_total,
-						 res->leb_size));
-	}
+		if (bytes < len)
+			len = bytes;
+		bytes -= len;
 
-	/* ec hdr (fixed, doesn't change) */
-	res->ec->magic = cpu_to_be32(UBI_EC_HDR_MAGIC);
-	res->ec->version = version ? version : UBI_VERSION;
-	res->ec->ec = cpu_to_be64(ec);
-	res->ec->vid_hdr_offset = cpu_to_be32(vid_hdr_offset);
+		l = len;
+		do {
+			rd = read(in, inbuf + len - l, l);
+			if (rd != l)
+				return sys_errmsg("cannot read %d bytes from the input file", l);
 
-	res->ec->data_offset = cpu_to_be32(data_offset);
+			l -= rd;
+		} while (l);
 
-	crc = clc_crc32(crc32_table, UBI_CRC32_INIT, res->ec,
-			UBI_EC_HDR_SIZE_CRC);
-	res->ec->hdr_crc = cpu_to_be32(crc);
+		vid_hdr = (struct ubi_vid_hdr *)(&outbuf[ui->vid_hdr_offs]);
+		init_vid_hdr(ui, vi, vid_hdr, lnum, inbuf, len);
 
-	/* prepare a read buffer */
-	res->buf = (uint8_t*) malloc (res->eb_size * sizeof(uint8_t));
-	if (res->buf == NULL) {
-		rc = -ENOMEM;
-		goto ubigen_create_err;
-	}
-
-	/* point to distinct regions within the buffer */
-	res->ptr_ec_hdr = res->buf;
-	res->ptr_vid_hdr = res->buf + be32_to_cpu(res->ec->vid_hdr_offset);
-	res->ptr_data = res->buf + be32_to_cpu(res->ec->vid_hdr_offset)
-		+ UBI_VID_HDR_SIZE;
+		memcpy(outbuf + ui->data_offs, inbuf, len);
+		memset(outbuf + ui->data_offs + len, 0xFF,
+		       ui->peb_size - ui->data_offs - len);
 
-	rc = validate_ubi_info(res);
-	if (rc != 0) {
-		fprintf(stderr, "Volume validation failed: %d\n", rc);
-		goto ubigen_create_err;
-	}
+		if (write(out, outbuf, ui->peb_size) != ui->peb_size)
+			return sys_errmsg("cannot write %d bytes to the output file", ui->peb_size);
 
-	dump_info(res);
-	*u = res;
-	return rc;
-
- ubigen_create_err:
-	if (res) {
-		if (res->v)
-			free(res->v);
-		if (res->ec)
-			free(res->ec);
-		if (res->buf)
-			free(res->buf);
-		free(res);
+		lnum += 1;
 	}
-	*u = NULL;
-	return rc;
-}
 
-int
-ubigen_get_leb_size(ubi_info_t u, size_t* size)
-{
-	if (u == NULL)
-		return -EINVAL;
-
-	*size = u->leb_size;
 	return 0;
 }
 
-
-int
-ubigen_get_leb_total(ubi_info_t u, size_t* total)
-{
-	if (u == NULL)
-		return -EINVAL;
-
-	*total = u->leb_total;
-	return 0;
-}
-
-int
-ubigen_set_lvol_rec(ubi_info_t u, size_t reserved_bytes,
-		    const char* vol_name, struct ubi_vtbl_record *lvol_rec)
+/**
+ * ubigen_write_layout_vol - write UBI layout volume
+ * @ui: libubigen information
+ * @peb1: physical eraseblock number to write the first volume table copy
+ * @peb2: physical eraseblock number to write the second volume table copy
+ * @ec1: erase counter value for @peb1
+ * @ec2: erase counter value for @peb1
+ * @vtbl: volume table
+ * @fd: output file descriptor seeked to the proper position
+ *
+ * This function creates the UBI layout volume which contains 2 copies of the
+ * volume table. Returns zero in case of success and %-1 in case of failure.
+ */
+int ubigen_write_layout_vol(const struct ubigen_info *ui, int peb1, int peb2,
+			    long long ec1, long long ec2,
+			    struct ubi_vtbl_record *vtbl, int fd)
 {
-	uint32_t crc;
-
-	if ((u == NULL) || (vol_name == NULL))
-		return -EINVAL;
-
-	memset(lvol_rec, 0x0, UBI_VTBL_RECORD_SIZE);
-
-	lvol_rec->reserved_pebs =
-		cpu_to_be32(byte_to_blk(reserved_bytes, u->leb_size));
-	lvol_rec->alignment = cpu_to_be32(u->alignment);
-	lvol_rec->data_pad = u->v->data_pad;
-	lvol_rec->vol_type = u->v->vol_type;
-
-	lvol_rec->name_len =
-		cpu_to_be16((uint16_t)strlen((const char*)vol_name));
-
-	memcpy(lvol_rec->name, vol_name, UBI_VOL_NAME_MAX + 1);
-
-	crc = clc_crc32(crc32_table, UBI_CRC32_INIT,
-			lvol_rec, UBI_VTBL_RECORD_SIZE_CRC);
-	lvol_rec->crc =	 cpu_to_be32(crc);
+	int ret;
+	struct ubigen_vol_info vi;
+	char outbuf[ui->peb_size];
+	struct ubi_vid_hdr *vid_hdr;
+	off_t seek;
+
+	vi.bytes = ui->leb_size * UBI_LAYOUT_VOLUME_EBS;
+	vi.id = UBI_LAYOUT_VOLUME_ID;
+	vi.alignment = UBI_LAYOUT_VOLUME_ALIGN;
+	vi.data_pad = ui->leb_size % UBI_LAYOUT_VOLUME_ALIGN;
+	vi.usable_leb_size = ui->leb_size - vi.data_pad;
+	vi.data_pad = ui->leb_size - vi.usable_leb_size;
+	vi.type = UBI_LAYOUT_VOLUME_TYPE;
+	vi.name = UBI_LAYOUT_VOLUME_NAME;
+	vi.name_len = strlen(UBI_LAYOUT_VOLUME_NAME);
+	vi.compat = UBI_LAYOUT_VOLUME_COMPAT;
+
+	memset(outbuf, 0xFF, ui->data_offs);
+	vid_hdr = (struct ubi_vid_hdr *)(&outbuf[ui->vid_hdr_offs]);
+	memcpy(outbuf + ui->data_offs, vtbl, ui->vtbl_size);
+	memset(outbuf + ui->data_offs + ui->vtbl_size, 0xFF,
+	       ui->peb_size - ui->data_offs - ui->vtbl_size);
+
+	seek = peb1 * ui->peb_size;
+	if (lseek(fd, seek, SEEK_SET) != seek)
+		return sys_errmsg("cannot seek output file");
+	ubigen_init_ec_hdr(ui, (struct ubi_ec_hdr *)outbuf, ec1);
+	init_vid_hdr(ui, &vi, vid_hdr, 0, NULL, 0);
+	ret = write(fd, outbuf, ui->peb_size);
+	if (ret != ui->peb_size)
+		return sys_errmsg("cannot write %d bytes", ui->peb_size);
+
+	seek = peb2 * ui->peb_size;
+	if (lseek(fd, seek, SEEK_SET) != seek)
+		return sys_errmsg("cannot seek output file");
+	ubigen_init_ec_hdr(ui, (struct ubi_ec_hdr *)outbuf, ec2);
+	init_vid_hdr(ui, &vi, vid_hdr, 1, NULL, 0);
+	ret = write(fd, outbuf, ui->peb_size);
+	if (ret != ui->peb_size)
+		return sys_errmsg("cannot write %d bytes", ui->peb_size);
 
 	return 0;
 }