Architecture:

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int smd_pool_add_tgt(uuid_t pool_id, uint32_t tgt_id, uint64_t blob_id,

enum smd_type smd_type, uint64_t blob_sz);

int smd_pool_get_blob(uuid_t pool_id, uint32_t tgt_id, enum smd_type smd_type, uint64_t *blob_id);

int smd_dev_add_tgt(uuid_t dev_id, uint32_t tgt_id, enum smd_type smd_type);

int smd_dev_del_tgt(uuid_t dev_id, uint32_t tgt_id, enum smd_type smd_type);

int smd_dev_get_by_tgt(uint32_t tgt_id, enum smd_type smd_type, struct smd_dev_info **dev_info);

struct smsmd_pool_info need needs to be changed to return more information for smd_pool_list()

struct smd_pool_info {
d_list_t spi_link;
uuid_t spi_id;
uint64_t spi_blobs_sz[SMD_TYPE_MAX];
uint32_t spi_tgt_cnt;
int *spi_tgts[SMD_TYPE_MAX];
uint64_t *spi_blobs[SMD_TYPE_MAX];
};

SMD interoperability

When DAOS was upgraded to newer version(PMEM for metadata), SMD should be able to read existed target and pool table.

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2. SMD might be duplicated on all Metadata SSDs in the future, for now we only scan and use first metadata device found for SYSDB device, SYSDB blob will be stored as “root“ blob, spdk_bs_set_super/spdk_bs_get_super helper could be used to set/get it.

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