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disk: part: auto append android a/b slot suffix when query partition 

This patch takes over the responsibility of slot suffix appending from
developer to framework on querying partition, it makes slot suffix
invisible for developers.

Change-Id: I33e1e8f6611232c4797d68b7b844a70db88a3eb8
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
This commit is contained in:
Joseph Chen 2019-10-24 15:41:37 +08:00 committed by Jianhong Chen
parent eb89f0a81d
commit bd4d909bda
1 changed files with 54 additions and 1 deletions
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53
disk/part.c
View File

@ -12,6 +12,10 @@
#include <malloc.h>
#include <part.h>
#include <ubifs_uboot.h>
#ifdef CONFIG_ANDROID_AB
#include <android_avb/avb_ops_user.h>
#include <android_avb/rk_avb_ops_user.h>
#endif
#undef PART_DEBUG
@ -667,6 +671,54 @@ cleanup:
return ret;
}
#ifdef CONFIG_ANDROID_AB
/*
* For android A/B system, we append the current slot suffix quietly,
* this takes over the responsibility of slot suffix appending from
* developer to framework.
*/
int part_get_info_by_name(struct blk_desc *dev_desc, const char *name,
disk_partition_t *info)
{
struct part_driver *part_drv;
char name_slot[32] = {0};
int none_slot_try = 1;
int ret, i;
part_drv = part_driver_lookup_type(dev_desc);
if (!part_drv)
return -1;
/* 1. Query partition with A/B slot suffix */
if (rk_avb_append_part_slot(name, name_slot))
return -1;
retry:
debug("## Query partition(%d): %s\n", none_slot_try, name_slot);
for (i = 1; i < part_drv->max_entries; i++) {
ret = part_drv->get_info(dev_desc, i, info);
if (ret != 0) {
/* no more entries in table */
break;
}
if (strcmp(name_slot, (const char *)info->name) == 0) {
/* matched */
return i;
}
}
/* 2. Query partition without A/B slot suffix if above failed */
if (none_slot_try) {
none_slot_try = 0;
strcpy(name_slot, name);
goto retry;
}
return -1;
}
#else
int part_get_info_by_name(struct blk_desc *dev_desc, const char *name,
disk_partition_t *info)
{
@ -691,6 +743,7 @@ int part_get_info_by_name(struct blk_desc *dev_desc, const char *name,
return -1;
}
#endif
void part_set_generic_name(const struct blk_desc *dev_desc,
int part_num, char *name)