This adds support for things like "#partname" and "0.1#partname". The block device parsing is done like in blk_get_device_part_str.
Signed-off-by: Sean Anderson sean.anderson@seco.com Reviewed-by: Simon Glass sjg@chromium.org ---
Changes in v2: - Update documentation
disk/part.c | 41 ++++++++++++++++++++++------------------- 1 file changed, 22 insertions(+), 19 deletions(-)
diff --git a/disk/part.c b/disk/part.c index 39c6b00a59..aaeafbb0b2 100644 --- a/disk/part.c +++ b/disk/part.c @@ -692,12 +692,13 @@ int part_get_info_by_name(struct blk_desc *dev_desc, const char *name, * Get partition info from device number and partition name. * * Parse a device number and partition name string in the form of - * "device_num#partition_name", for example "0#misc". If the partition - * is found, sets dev_desc and part_info accordingly with the information - * of the partition with the given partition_name. + * "devicenum.hwpartnum#partition_name", for example "0.1#misc". devicenum and + * hwpartnum are both optional, defaulting to 0. If the partition is found, + * sets dev_desc and part_info accordingly with the information of the + * partition with the given partition_name. * * @param[in] dev_iface Device interface - * @param[in] dev_part_str Input string argument, like "0#misc" + * @param[in] dev_part_str Input string argument, like "0.1#misc" * @param[out] dev_desc Place to store the device description pointer * @param[out] part_info Place to store the partition information * @return 0 on success, or a negative on error @@ -707,29 +708,31 @@ static int part_get_info_by_dev_and_name(const char *dev_iface, struct blk_desc **dev_desc, struct disk_partition *part_info) { - char *ep; - const char *part_str; - int dev_num, ret; + char *dup_str = NULL; + const char *dev_str, *part_str; + int ret;
+ /* Separate device and partition name specification */ part_str = strchr(dev_part_str, '#'); - if (!part_str || part_str == dev_part_str) - return -EINVAL; - - dev_num = simple_strtoul(dev_part_str, &ep, 16); - if (ep != part_str) { - /* Not all the first part before the # was parsed. */ + if (part_str) { + dup_str = strdup(dev_part_str); + dup_str[part_str - dev_part_str] = 0; + dev_str = dup_str; + part_str++; + } else { return -EINVAL; } - part_str++;
- *dev_desc = blk_get_dev(dev_iface, dev_num); - if (!*dev_desc) { - printf("Could not find %s %d\n", dev_iface, dev_num); - return -ENODEV; - } + ret = blk_get_device_by_str(dev_iface, dev_str, dev_desc); + if (ret) + goto cleanup; + ret = part_get_info_by_name(*dev_desc, part_str, part_info); if (ret < 0) printf("Could not find "%s" partition\n", part_str); + +cleanup: + free(dup_str); return ret; }