コード例 #1
0
int ubi_check_volume(struct ubi_device *ubi, int vol_id)
{
	void *buf;
	int err = 0, i;
	struct ubi_volume *vol = ubi->volumes[vol_id];

	if (vol->vol_type != UBI_STATIC_VOLUME)
		return 0;

	buf = vmalloc(vol->usable_leb_size);
	if (!buf)
		return -ENOMEM;

	for (i = 0; i < vol->used_ebs; i++) {
		int size;

		if (i == vol->used_ebs - 1)
			size = vol->last_eb_bytes;
		else
			size = vol->usable_leb_size;

		err = ubi_eba_read_leb(ubi, vol, i, buf, 0, size, 1);
		if (err) {
			if (err == -EBADMSG)
				err = 1;
			break;
		}
	}

	vfree(buf);
	return err;
}
コード例 #2
0
ファイル: barebox.c プロジェクト: gazoo74/barebox
static ssize_t ubi_volume_cdev_read(struct cdev *cdev, void *buf, size_t size,
		loff_t offset, unsigned long flags)
{
	struct ubi_volume_cdev_priv *priv = cdev->priv;
	struct ubi_volume *vol = priv->vol;
	struct ubi_device *ubi = priv->ubi;
	int err, lnum, off, len;
	size_t count_save = size;
	unsigned long long tmp;
	loff_t offp = offset;
	int usable_leb_size = vol->usable_leb_size;

	ubi_debug("%s: %zd @ 0x%08llx", __func__, size, offset);

	len = size > usable_leb_size ? usable_leb_size : size;

	tmp = offp;
	off = do_div(tmp, usable_leb_size);
	lnum = tmp;
	do {
		if (off + len >= usable_leb_size)
			len = usable_leb_size - off;

		err = ubi_eba_read_leb(ubi, vol, lnum, buf, off, len, 0);
		if (err) {
			ubi_err(ubi, "read error: %s", strerror(-err));
			break;
		}
		off += len;
		if (off == usable_leb_size) {
			lnum += 1;
			off -= usable_leb_size;
		}

		size -= len;
		offp += len;

		buf += len;
		len = size > usable_leb_size ? usable_leb_size : size;
	} while (size);

	return count_save;
}
コード例 #3
0
ファイル: gluebi.c プロジェクト: 3sOx/asuswrt-merlin
/**
 * gluebi_read - read operation of emulated MTD devices.
 * @mtd: MTD device description object
 * @from: absolute offset from where to read
 * @len: how many bytes to read
 * @retlen: count of read bytes is returned here
 * @buf: buffer to store the read data
 *
 * This function returns zero in case of success and a negative error code in
 * case of failure.
 */
static int gluebi_read(struct mtd_info *mtd, loff_t from, size_t len,
		       size_t *retlen, unsigned char *buf)
{
	int err = 0, lnum, offs, total_read;
	struct ubi_volume *vol;
	struct ubi_device *ubi;
	uint64_t tmp = from;

	dbg_msg("read %zd bytes from offset %lld", len, from);

	if (len < 0 || from < 0 || from + len > mtd->size)
		return -EINVAL;

	vol = container_of(mtd, struct ubi_volume, gluebi_mtd);
	ubi = vol->ubi;

	offs = do_div(tmp, mtd->erasesize);
	lnum = tmp;

	total_read = len;
	while (total_read) {
		size_t to_read = mtd->erasesize - offs;

		if (to_read > total_read)
			to_read = total_read;

		err = ubi_eba_read_leb(ubi, vol->vol_id, lnum, buf, offs,
				       to_read, 0);
		if (err)
			break;

		lnum += 1;
		offs = 0;
		total_read -= to_read;
		buf += to_read;
	}

	*retlen = len - total_read;
	return err;
}
コード例 #4
0
ファイル: kapi.c プロジェクト: 119-org/hi3518-osdrv
/**
 * ubi_leb_read - read data.
 * @desc: volume descriptor
 * @lnum: logical eraseblock number to read from
 * @buf: buffer where to store the read data
 * @offset: offset within the logical eraseblock to read from
 * @len: how many bytes to read
 * @check: whether UBI has to check the read data's CRC or not.
 *
 * This function reads data from offset @offset of logical eraseblock @lnum and
 * stores the data at @buf. When reading from static volumes, @check specifies
 * whether the data has to be checked or not. If yes, the whole logical
 * eraseblock will be read and its CRC checksum will be checked (i.e., the CRC
 * checksum is per-eraseblock). So checking may substantially slow down the
 * read speed. The @check argument is ignored for dynamic volumes.
 *
 * In case of success, this function returns zero. In case of failure, this
 * function returns a negative error code.
 *
 * %-EBADMSG error code is returned:
 * o for both static and dynamic volumes if MTD driver has detected a data
 *   integrity problem (unrecoverable ECC checksum mismatch in case of NAND);
 * o for static volumes in case of data CRC mismatch.
 *
 * If the volume is damaged because of an interrupted update this function just
 * returns immediately with %-EBADF error code.
 */
int ubi_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
		 int len, int check)
{
	struct ubi_volume *vol = desc->vol;
	struct ubi_device *ubi = vol->ubi;
	int err, vol_id = vol->vol_id;

	dbg_gen("read %d bytes from LEB %d:%d:%d", len, vol_id, lnum, offset);

	if (vol_id < 0 || vol_id >= ubi->vtbl_slots || lnum < 0 ||
	    lnum >= vol->used_ebs || offset < 0 || len < 0 ||
	    offset + len > vol->usable_leb_size)
		return -EINVAL;

	if (vol->vol_type == UBI_STATIC_VOLUME) {
		if (vol->used_ebs == 0)
			/* Empty static UBI volume */
			return 0;
		if (lnum == vol->used_ebs - 1 &&
		    offset + len > vol->last_eb_bytes)
			return -EINVAL;
	}

	if (vol->upd_marker)
		return -EBADF;
	if (len == 0)
		return 0;

	err = ubi_eba_read_leb(ubi, vol, lnum, buf, offset, len, check);
	if (err && err == -EBADMSG && vol->vol_type == UBI_STATIC_VOLUME) {
		ubi_warn("mark volume %d as corrupted", vol_id);
		vol->corrupted = 1;
	}

	return err;
}
コード例 #5
0
ファイル: kapi.c プロジェクト: Noltari/u-boot
/**
 * ubi_leb_read - read data.
 * @desc: volume descriptor
 * @lnum: logical eraseblock number to read from
 * @buf: buffer where to store the read data
 * @offset: offset within the logical eraseblock to read from
 * @len: how many bytes to read
 * @check: whether UBI has to check the read data's CRC or not.
 *
 * This function reads data from offset @offset of logical eraseblock @lnum and
 * stores the data at @buf. When reading from static volumes, @check specifies
 * whether the data has to be checked or not. If yes, the whole logical
 * eraseblock will be read and its CRC checksum will be checked (i.e., the CRC
 * checksum is per-eraseblock). So checking may substantially slow down the
 * read speed. The @check argument is ignored for dynamic volumes.
 *
 * In case of success, this function returns zero. In case of failure, this
 * function returns a negative error code.
 *
 * %-EBADMSG error code is returned:
 * o for both static and dynamic volumes if MTD driver has detected a data
 *   integrity problem (unrecoverable ECC checksum mismatch in case of NAND);
 * o for static volumes in case of data CRC mismatch.
 *
 * If the volume is damaged because of an interrupted update this function just
 * returns immediately with %-EBADF error code.
 */
int ubi_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
		 int len, int check)
{
	struct ubi_volume *vol = desc->vol;
	struct ubi_device *ubi = vol->ubi;
	int err, vol_id = vol->vol_id;

	dbg_gen("read %d bytes from LEB %d:%d:%d", len, vol_id, lnum, offset);

	err = leb_read_sanity_check(desc, lnum, offset, len);
	if (err < 0)
		return err;

	if (len == 0)
		return 0;

	err = ubi_eba_read_leb(ubi, vol, lnum, buf, offset, len, check);
	if (err && mtd_is_eccerr(err) && vol->vol_type == UBI_STATIC_VOLUME) {
		ubi_warn(ubi, "mark volume %d as corrupted", vol_id);
		vol->corrupted = 1;
	}

	return err;
}
コード例 #6
0
ファイル: cdev.c プロジェクト: maraz/linux-2.6
static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count,
			     loff_t *offp)
{
	struct ubi_volume_desc *desc = file->private_data;
	struct ubi_volume *vol = desc->vol;
	struct ubi_device *ubi = vol->ubi;
	int err, lnum, off, len,  tbuf_size;
	size_t count_save = count;
	void *tbuf;
	uint64_t tmp;

	dbg_msg("read %zd bytes from offset %lld of volume %d",
		count, *offp, vol->vol_id);

	if (vol->updating) {
		dbg_err("updating");
		return -EBUSY;
	}
	if (vol->upd_marker) {
		dbg_err("damaged volume, update marker is set");
		return -EBADF;
	}
	if (*offp == vol->used_bytes || count == 0)
		return 0;

	if (vol->corrupted)
		dbg_msg("read from corrupted volume %d", vol->vol_id);

	if (*offp + count > vol->used_bytes)
		count_save = count = vol->used_bytes - *offp;

	tbuf_size = vol->usable_leb_size;
	if (count < tbuf_size)
		tbuf_size = ALIGN(count, ubi->min_io_size);
	tbuf = vmalloc(tbuf_size);
	if (!tbuf)
		return -ENOMEM;

	len = count > tbuf_size ? tbuf_size : count;

	tmp = *offp;
	off = do_div(tmp, vol->usable_leb_size);
	lnum = tmp;

	do {
		cond_resched();

		if (off + len >= vol->usable_leb_size)
			len = vol->usable_leb_size - off;

		err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
		if (err)
			break;

		off += len;
		if (off == vol->usable_leb_size) {
			lnum += 1;
			off -= vol->usable_leb_size;
		}

		count -= len;
		*offp += len;

		err = copy_to_user(buf, tbuf, len);
		if (err) {
			err = -EFAULT;
			break;
		}

		buf += len;
		len = count > tbuf_size ? tbuf_size : count;
	} while (count);

	vfree(tbuf);
	return err ? err : count_save - count;
}
コード例 #7
0
ファイル: cmd_ubi.c プロジェクト: haitend/u-boot-for-mpc8315
static int ubi_volume_read(char *volume, char *buf, size_t size)
{
	int err, lnum, off, len, tbuf_size, i = 0;
	size_t count_save = size;
	void *tbuf;
	unsigned long long tmp;
	struct ubi_volume *vol = NULL;
	loff_t offp = 0;

	for (i = 0; i < ubi->vtbl_slots; i++) {
		vol = ubi->volumes[i];
		if (vol && !strcmp(vol->name, volume)) {
			printf("Volume %s found at volume id %d\n",
				volume, vol->vol_id);
			break;
		}
	}
	if (i == ubi->vtbl_slots) {
		printf("%s volume not found\n", volume);
		return 0;
	}

	printf("read %i bytes from volume %d to %x(buf address)\n",
	       (int) size, vol->vol_id, (unsigned)buf);

	if (vol->updating) {
		printf("updating");
		return -EBUSY;
	}
	if (vol->upd_marker) {
		printf("damaged volume, update marker is set");
		return -EBADF;
	}
	if (offp == vol->used_bytes)
		return 0;

	if (size == 0) {
		printf("Read [%lu] bytes\n", (unsigned long) vol->used_bytes);
		size = vol->used_bytes;
	}

	if (vol->corrupted)
		printf("read from corrupted volume %d", vol->vol_id);
	if (offp + size > vol->used_bytes)
		count_save = size = vol->used_bytes - offp;

	tbuf_size = vol->usable_leb_size;
	if (size < tbuf_size)
		tbuf_size = ALIGN(size, ubi->min_io_size);
	tbuf = malloc(tbuf_size);
	if (!tbuf) {
		printf("NO MEM\n");
		return -ENOMEM;
	}
	len = size > tbuf_size ? tbuf_size : size;

	tmp = offp;
	off = do_div(tmp, vol->usable_leb_size);
	lnum = tmp;
	do {
		if (off + len >= vol->usable_leb_size)
			len = vol->usable_leb_size - off;

		err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
		if (err) {
			printf("read err %x\n", err);
			break;
		}
		off += len;
		if (off == vol->usable_leb_size) {
			lnum += 1;
			off -= vol->usable_leb_size;
		}

		size -= len;
		offp += len;

		memcpy(buf, tbuf, len);

		buf += len;
		len = size > tbuf_size ? tbuf_size : size;
	} while (size);

	free(tbuf);
	return err ? err : count_save - size;
}
コード例 #8
0
ファイル: cmd_ubi.c プロジェクト: jing-git/rt-n56u
static int ubi_volume_read(char *volume, char *buf, size_t size, size_t offset)
{
	int err, lnum, off, len, tbuf_size;
	void *tbuf;
	unsigned long long tmp;
	struct ubi_volume *vol;
	loff_t offp = 0;

	vol = ubi_find_volume(volume);
	if (vol == NULL)
		return ENODEV;

	offp = offset;
	printf("Read 0x%x bytes from volume [%s] offset 0x%x to %p\n", size, volume, offset, buf);

	if (vol->updating) {
		printf("updating");
		return EBUSY;
	}
	if (vol->upd_marker) {
		printf("damaged volume, update marker is set");
		return EBADF;
	}
	if (offp == vol->used_bytes)
		return 0;

	if (size == 0) {
		printf("No size specified -> Using max size (0x%lx)\n", (long)vol->used_bytes);
		size = vol->used_bytes;
	}

	if (vol->corrupted)
		printf("read from corrupted volume %d", vol->vol_id);
	if (offp + size > vol->used_bytes)
		size = vol->used_bytes - offp;

	tbuf_size = vol->usable_leb_size;
	if (size < tbuf_size)
		tbuf_size = ALIGN(size, ubi->min_io_size);
	tbuf = malloc(tbuf_size);
	if (!tbuf) {
		printf("NO MEM\n");
		return ENOMEM;
	}
	len = size > tbuf_size ? tbuf_size : size;

	tmp = offp;
	off = do_div(tmp, vol->usable_leb_size);
	lnum = tmp;
	do {
		if (off + len >= vol->usable_leb_size)
			len = vol->usable_leb_size - off;

		err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
		if (err) {
			printf("read err %x\n", err);
			err = -err;
			break;
		}
		off += len;
		if (off == vol->usable_leb_size) {
			lnum += 1;
			off -= vol->usable_leb_size;
		}

		size -= len;
		offp += len;

		memcpy(buf, tbuf, len);

		buf += len;
		len = size > tbuf_size ? tbuf_size : size;
	} while (size);

	free(tbuf);
	debug("\n0x%x bytes read from volume %s\n", size, volume);

	return err;
}