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disk: part: Add API to get partitions with specific driver
Adds part_driver_get_type() API which can be used to force a specific driver to be used when getting partition information instead of relying on auto detection. Signed-off-by: Joshua Watt <JPEWhacker@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
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parent
44ef2855e1
commit
387f8be55b
2 changed files with 49 additions and 8 deletions
38
disk/part.c
38
disk/part.c
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@ -26,6 +26,22 @@
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/* Check all partition types */
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#define PART_TYPE_ALL -1
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static struct part_driver *part_driver_get_type(int part_type)
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{
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struct part_driver *drv =
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ll_entry_start(struct part_driver, part_driver);
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const int n_ents = ll_entry_count(struct part_driver, part_driver);
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struct part_driver *entry;
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for (entry = drv; entry != drv + n_ents; entry++) {
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if (part_type == entry->part_type)
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return entry;
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}
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/* Not found */
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return NULL;
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}
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static struct part_driver *part_driver_lookup_type(struct blk_desc *dev_desc)
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{
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struct part_driver *drv =
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@ -44,10 +60,7 @@ static struct part_driver *part_driver_lookup_type(struct blk_desc *dev_desc)
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}
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}
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} else {
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for (entry = drv; entry != drv + n_ents; entry++) {
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if (dev_desc->part_type == entry->part_type)
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return entry;
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}
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return part_driver_get_type(dev_desc->part_type);
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}
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/* Not found */
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@ -322,8 +335,8 @@ void part_print(struct blk_desc *dev_desc)
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drv->print(dev_desc);
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}
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int part_get_info(struct blk_desc *dev_desc, int part,
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struct disk_partition *info)
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int part_get_info_by_type(struct blk_desc *dev_desc, int part, int part_type,
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struct disk_partition *info)
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{
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struct part_driver *drv;
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@ -336,7 +349,12 @@ int part_get_info(struct blk_desc *dev_desc, int part,
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info->type_guid[0] = 0;
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#endif
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drv = part_driver_lookup_type(dev_desc);
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if (part_type == PART_TYPE_UNKNOWN) {
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drv = part_driver_lookup_type(dev_desc);
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} else {
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drv = part_driver_get_type(part_type);
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}
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if (!drv) {
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debug("## Unknown partition table type %x\n",
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dev_desc->part_type);
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@ -356,6 +374,12 @@ int part_get_info(struct blk_desc *dev_desc, int part,
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return -ENOENT;
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}
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int part_get_info(struct blk_desc *dev_desc, int part,
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struct disk_partition *info)
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{
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return part_get_info_by_type(dev_desc, part, PART_TYPE_UNKNOWN, info);
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}
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int part_get_info_whole_disk(struct blk_desc *dev_desc,
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struct disk_partition *info)
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{
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@ -105,7 +105,24 @@ struct blk_desc *blk_get_dev(const char *ifname, int dev);
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struct blk_desc *mg_disk_get_dev(int dev);
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/* disk/part.c */
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/**
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* part_get_info_by_type() - Get partitions from a block device using a specific
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* partition driver
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*
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* Each interface allocates its own devices and typically struct blk_desc is
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* contained with the interface's data structure. There is no global
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* numbering for block devices, so the interface name must be provided.
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*
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* @dev_desc: Block device descriptor
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* @part: Partition number to read
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* @part_type: Partition driver to use, or PART_TYPE_UNKNOWN to automatically
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* choose a driver
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* @info: Returned partition information
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*
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* Return: 0 on success, negative errno on failure
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*/
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int part_get_info_by_type(struct blk_desc *dev_desc, int part, int part_type,
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struct disk_partition *info);
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int part_get_info(struct blk_desc *dev_desc, int part,
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struct disk_partition *info);
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/**
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