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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-02-19 14:54:17 +0200
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-02-19 16:41:16 +0200
commit86dd9696d3a1acb036d65909d93d73455b8aed3a (patch)
tree9e8bb6797b3bebd0bf83ae1fab2151a6dfeafe6a /ubi-utils/new-utils/src/libubigen.c
parentef644090223e5983ca2492850354c1390e3368d1 (diff)
Revert ubi-tools changes
Restore ubi tools to their "original" state, which means to the state they were before I stareted cleaning them up. Instead, create a "new-utils" subdirectory and move my work there. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'ubi-utils/new-utils/src/libubigen.c')
-rw-r--r--ubi-utils/new-utils/src/libubigen.c321
1 files changed, 321 insertions, 0 deletions
diff --git a/ubi-utils/new-utils/src/libubigen.c b/ubi-utils/new-utils/src/libubigen.c
new file mode 100644
index 0000000..8d71fde
--- /dev/null
+++ b/ubi-utils/new-utils/src/libubigen.c
@@ -0,0 +1,321 @@
+/*
+ * 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
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * Generating UBI images.
+ *
+ * Authors: Oliver Lohmann
+ * Artem Bityutskiy
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <mtd/ubi-header.h>
+#include <libubigen.h>
+#include "crc32.h"
+#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
+ * @ec: initial erase counter
+ */
+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,
+ long long ec)
+{
+ if (!vid_hdr_offs)
+ vid_hdr_offs = subpage_size;
+
+ 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->ec = ec;
+
+ ui->vtbl_size = ui->leb_size;
+ if (ui->vtbl_size > UBI_MAX_VOLUMES * UBI_VTBL_RECORD_SIZE)
+ ui->vtbl_size = UBI_MAX_VOLUMES * UBI_VTBL_RECORD_SIZE;
+ ui->max_volumes = ui->vtbl_size / UBI_VTBL_RECORD_SIZE;
+}
+
+/**
+ * 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)
+{
+ struct ubi_vtbl_record *vtbl;
+ int i;
+
+ vtbl = calloc(1, ui->vtbl_size);
+ if (!vtbl) {
+ errmsg("cannot allocate %d bytes of memory", ui->vtbl_size);
+ return NULL;
+ }
+
+ for (i = 0; i < UBI_MAX_VOLUMES; i++) {
+ uint32_t crc = crc32(UBI_CRC32_INIT, &vtbl[i],
+ UBI_VTBL_RECORD_SIZE_CRC);
+ vtbl[i].crc = cpu_to_be32(crc);
+ }
+
+ return vtbl;
+}
+
+/**
+ * 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)
+{
+ 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;
+}
+
+/**
+ * init_ec_hdr - initialize EC header.
+ * @ui: libubigen information
+ * @hdr: the EC header to initialize
+ */
+static void init_ec_hdr(const struct ubigen_info *ui,
+ struct ubi_ec_hdr *hdr)
+{
+ uint32_t crc;
+
+ memset(hdr, '\0', sizeof(struct ubi_ec_hdr));
+
+ hdr->magic = cpu_to_be32(UBI_EC_HDR_MAGIC);
+ hdr->version = ui->ubi_ver;
+ hdr->ec = cpu_to_be64(ui->ec);
+ hdr->vid_hdr_offset = cpu_to_be32(ui->vid_hdr_offs);
+
+ hdr->data_offset = cpu_to_be32(ui->data_offs);
+
+ crc = crc32(UBI_CRC32_INIT, hdr, UBI_EC_HDR_SIZE_CRC);
+ hdr->hdr_crc = cpu_to_be32(crc);
+}
+
+/**
+ * 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)
+{
+ uint32_t crc;
+
+ 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);
+ }
+
+ crc = crc32(UBI_CRC32_INIT, hdr, UBI_VID_HDR_SIZE_CRC);
+ hdr->hdr_crc = cpu_to_be32(crc);
+}
+
+/**
+ * ubigen_write_volume - write UBI volume.
+ * @ui: libubigen information
+ * @vi: volume information
+ * @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 bytes, FILE *in, FILE *out)
+{
+ int len = vi->usable_leb_size, rd, lnum = 0;
+ char inbuf[ui->leb_size], outbuf[ui->peb_size];
+
+ 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(outbuf, 0xFF, ui->data_offs);
+ init_ec_hdr(ui, (struct ubi_ec_hdr *)outbuf);
+
+ while (bytes) {
+ int l;
+ struct ubi_vid_hdr *vid_hdr;
+
+ if (bytes < len)
+ len = bytes;
+ bytes -= len;
+
+ l = len;
+ do {
+ rd = fread(inbuf + len - l, 1, l, in);
+ if (rd == 0) {
+ if (ferror(in))
+ return errmsg("cannot read %d bytes from the input file", l);
+ else
+ return errmsg("not enough data in the input file");
+ }
+
+ l -= rd;
+ } while (l);
+
+ vid_hdr = (struct ubi_vid_hdr *)(&outbuf[ui->vid_hdr_offs]);
+ init_vid_hdr(ui, vi, vid_hdr, lnum, inbuf, len);
+
+ memcpy(outbuf + ui->data_offs, inbuf, len);
+ memset(outbuf + ui->data_offs + len, 0xFF,
+ ui->peb_size - ui->data_offs - len);
+
+ if (fwrite(outbuf, 1, ui->peb_size, out) != ui->peb_size)
+ return errmsg("cannot write %d bytes from the output file", l);
+
+ lnum += 1;
+ }
+
+ return 0;
+}
+
+/**
+ * ubigen_write_layout_vol - write UBI layout volume
+ * @ui: libubigen information
+ * @vtbl: volume table
+ * @out: output file stream
+ *
+ * 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,
+ struct ubi_vtbl_record *vtbl, FILE *out)
+{
+ int size = ui->leb_size;
+ struct ubigen_vol_info vi;
+ char outbuf[ui->peb_size];
+ struct ubi_vid_hdr *vid_hdr;
+
+ if (size > UBI_MAX_VOLUMES * UBI_VTBL_RECORD_SIZE)
+ size = UBI_MAX_VOLUMES * UBI_VTBL_RECORD_SIZE;
+
+ 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]);
+ init_ec_hdr(ui, (struct ubi_ec_hdr *)outbuf);
+ memcpy(outbuf + ui->data_offs, vtbl, size);
+ memset(outbuf + ui->data_offs + size, 0xFF,
+ ui->peb_size - ui->data_offs - size);
+
+ init_vid_hdr(ui, &vi, vid_hdr, 0, NULL, 0);
+ size = fwrite(outbuf, 1, ui->peb_size, out);
+ if (size == ui->peb_size) {
+ init_vid_hdr(ui, &vi, vid_hdr, 1, NULL, 0);
+ size = fwrite(outbuf, 1, ui->peb_size, out);
+ if (size != ui->peb_size)
+ return sys_errmsg("cannot write %d bytes", ui->peb_size);
+ }
+
+ return 0;
+}