From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> Hi all, This series addresses a long standing limitation going back to early LIO v3.x days, where all TCM backend devices originally used local scope struct config_item_types in target_core_configfs.c code that resulted in same /sys/kernel/config/target/core/$HBA/$DEV/attrib/* for all se_subsystem_api flavors, regardless of ->transport_type. This has made user-space complexity grow slightly over the years, causing rtslib + friends to have to determine which device attributes can be changed at run-time for pSCSI vs. other backend drivers. On the other hand, existing target_core_fabric_configfs.c logic in LIO v4.0 has used a method that lets fabric drivers populate their own driver dependent attributes using struct config_item_type members within struct target_fabric_configfs->tf_cit_tmpl. This allows for config_item_type (CITs) to live within external modules, so fabric drivers can add new attributes without breaking existing configfs user-space ABI. To that end, this series exposes the 6 existing se_device CITs from target_core_configfs.c externally to backend drivers, and using a new set of helper macros in target_core_backend_configfs.h converts existing IBLOCK, FILEIO, RAMDISK, TCM-USER, and PSCSI to populate their own set of backend device attributes. Post conversion, IBLOCK, FILEIO, RAMDISK, and TCM-USER device attrs remain unchanged to user-space via the DEF_TB_DEFAULT_ATTRIBS CPP magic, and PSCSI now exposes 4 read-only attributes: hw_pi_prot_type, hw_block_size, hw_max_sectors and hw_queue_depth. Thanks! --nab Nicholas Bellinger (16): target: Move dev_cit to struct se_subsystem_api target: Move dev_attrib_cit to struct se_subsystem_api target: Move dev_pr_cit to struct se_subsystem_api target: Move dev_wwn_cit to struct se_subsystem_api target: Move dev_alua_tg_pt_gps_cit to struct se_subsystem_api target: Move dev_stat_cit to struct se_subsystem_api target: Add target_core_backend_configfs.h helper macros target: Add EXPORT_SYMBOL for existing se_dev_set_* target: Add DEF_TB_DEFAULT_ATTRIBS macro for virtual device attrs target/iblock: Convert to external iblock_backend_dev_attrs target/file: Convert to external fileio_backend_dev_attrs target/rd: Convert to external rd_mcp_backend_dev_attrs target/user: Convert to external tcmu_backend_dev_attrs target/pscsi: Convert to external pscsi_backend_dev_attrs target: Drop left-over internal dev attribute code target: Drop left-over PHBA_PDEV set attr checks drivers/target/target_core_configfs.c | 269 +++++--------------------- drivers/target/target_core_device.c | 90 ++++----- drivers/target/target_core_file.c | 42 ++++ drivers/target/target_core_hba.c | 1 + drivers/target/target_core_iblock.c | 42 ++++ drivers/target/target_core_internal.h | 28 --- drivers/target/target_core_pscsi.c | 26 +++ drivers/target/target_core_rd.c | 41 ++++ drivers/target/target_core_user.c | 42 ++++ include/target/target_core_backend.h | 43 ++++ include/target/target_core_backend_configfs.h | 120 ++++++++++++ 11 files changed, 442 insertions(+), 302 deletions(-) create mode 100644 include/target/target_core_backend_configfs.h -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
