diff options
Diffstat (limited to 'disk/part.c')
| -rw-r--r-- | disk/part.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/disk/part.c b/disk/part.c index 8035dcb8a4..9190e88061 100644 --- a/disk/part.c +++ b/disk/part.c @@ -26,6 +26,12 @@ /* Check all partition types */ #define PART_TYPE_ALL -1 +/** + * part_driver_get_type() - Get a driver given its type + * + * @part_type: Partition type to find the driver for + * Return: Driver for that type, or NULL if none + */ static struct part_driver *part_driver_get_type(int part_type) { struct part_driver *drv = @@ -42,6 +48,22 @@ static struct part_driver *part_driver_get_type(int part_type) return NULL; } +/** + * part_driver_lookup_type() - Look up the partition driver for a blk device + * + * If @desc->part_type is PART_TYPE_UNKNOWN, this checks each parition driver + * against the blk device to see if there is a valid partition table acceptable + * to that driver. + * + * If @desc->part_type is already set, it just returns the driver for that + * type, without testing if the driver can find a valid partition on the + * descriptor. + * + * On success it updates @desc->part_type if set to PART_TYPE_UNKNOWN on entry + * + * @dev_desc: Device descriptor + * Return: Driver found, or NULL if none + */ static struct part_driver *part_driver_lookup_type(struct blk_desc *desc) { struct part_driver *drv = @@ -83,6 +105,16 @@ int part_get_type_by_name(const char *name) return PART_TYPE_UNKNOWN; } +/** + * get_dev_hwpart() - Get the descriptor for a device with hardware partitions + * + * @ifname: Interface name (e.g. "ide", "scsi") + * @dev: Device number (0 for first device on that interface, 1 for + * second, etc. + * @hwpart: Hardware partition, or 0 if none (used for MMC) + * Return: pointer to the block device, or NULL if not available, or an + * error occurred. + */ static struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart) { struct blk_desc *desc; |