On Wed, Nov 16, 2011 at 10:24:22AM +0100, Juergen Beisert wrote:
> This covers disk like media like SD card, CF cards, regular hard disks and also
> USB mass storage devices. Most common used partition table is still of DOS type.
> This implementation is prepared to support more partition types in the future.
>
> Signed-off-by: Juergen Beisert <jbe@xxxxxxxxxxxxxx>
> ---
> common/Kconfig | 18 ++++
> common/Makefile | 2 +
> common/partitions.c | 229 +++++++++++++++++++++++++++++++++++++++++++++++++++
> include/disks.h | 2 +
> 4 files changed, 251 insertions(+), 0 deletions(-)
> create mode 100644 common/partitions.c
>
> diff --git a/common/Kconfig b/common/Kconfig
> index 8e96920..1318e7d 100644
> --- a/common/Kconfig
> +++ b/common/Kconfig
> @@ -406,6 +406,24 @@ config PARTITION
+
> +/**
> + * Try to collect partition information on the given block device
> + * @param blk Block device to examine
> + * @return 0 most of the time, negative value else
> + *
> + * It is not a failure if no partition information is found
> + */
> +int parse_partition_table(struct block_device *blk)
> +{
> + int i;
> + int rc = 0;
> +
> +#ifdef CONFIG_PARTITION_DISK_DOS
> + if (pdesc.used_entries == 0)
> + try_dos_partition(blk);
> +#endif
> +
> + if (pdesc.used_entries != 0) {
So every block device that comes in uses the same global variable. We
should support multiple block devices.
Also it should be possible to unregister the partitions on a block
device.
> + /* at least one partition description found */
> + for (i = 0; i < pdesc.used_entries; i++) {
> + rc = register_one_partition(blk, &pdesc.parts[i], i);
> + if (rc != 0)
> + dev_err(blk->dev,
> + "Failed to register partition %d on %s (%d)\n",
> + i, blk->cdev.name, rc);
> + if (rc != -ENODEV)
> + rc = 0;
> + }
> + }
> +
> + return rc;
> +}
> diff --git a/include/disks.h b/include/disks.h
> index ec136d4..9932750 100644
> --- a/include/disks.h
> +++ b/include/disks.h
> @@ -36,4 +36,6 @@ struct partition_entry {
> uint32_t partition_size; /*! Start of the partition in LBA notation */
> } __attribute__ ((packed));
>
> +extern int parse_partition_table(struct block_device*);
> +
> #endif /* DISKS_H */
> --
> 1.7.7.1
>
>
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