Eric Lee / smarc-fsl-linux-kernel

24 Mar, 2011

1 commit

  • 12d233842   [SCSI] target: add initial statistics ... Browse Code »

    This patch adds a target_core_mib.c statistics conversion for
    backend context struct se_subsystem_dev + struct se_device config_group
    based statistics in target_core_device.c using CONFIGFS_EATTR()
    based struct config_item_types from target_core_stat.c code.

    The conversion from backend /proc/scsi_target/mib/ context output to configfs
    default groups+attributes include scsi_dev, scsi_lu, and scsi_tgt_dev output
    from within individual:

    /sys/kernel/config/target/core/$HBA/DEV/

    The legacy procfs output now appear as individual configfs attributes under:

    *) $HBA/$DEV/statistics/scsi_dev:

    |-- indx
    |-- inst
    |-- ports
    `-- role

    *) $HBA/$DEV/statistics/scsi_lu:

    |-- creation_time
    |-- dev
    |-- dev_type
    |-- full_stat
    |-- hs_num_cmds
    |-- indx
    |-- inst
    |-- lu_name
    |-- lun
    |-- num_cmds
    |-- prod
    |-- read_mbytes
    |-- resets
    |-- rev
    |-- state_bit
    |-- status
    |-- vend
    `-- write_mbytes

    *) $HBA/$DEV/statistics/scsi_tgt_dev:

    |-- indx
    |-- inst
    |-- non_access_lus
    |-- num_lus
    |-- resets
    `-- status

    The conversion from backend /proc/scsi_target/mib/ context output to configfs
    default groups+attributes include scsi_port, scsi_tgt_port and scsi_transport
    output from within individual:

    /sys/kernel/config/target/fabric/$WWN/tpgt_$TPGT/lun/lun_$LUN_ID/statistics/

    The legacy procfs output now appear as individual configfs attributes under:

    *) fabric/$WWN/tpgt_$TPGT/lun/lun_$LUN_ID/statistics/scsi_port

    |-- busy_count
    |-- dev
    |-- indx
    |-- inst
    `-- role

    *) fabric/$WWN/tpgt_$TPGT/lun/lun_$LUN_ID/statistics/scsi_tgt_port

    |-- dev
    |-- hs_in_cmds
    |-- in_cmds
    |-- indx
    |-- inst
    |-- name
    |-- port_index
    |-- read_mbytes
    `-- write_mbytes

    *) fabric/$WWN/tpgt_$TPGT/lun/lun_$LUN_ID/statistics/scsi_transport

    |-- dev_name
    |-- device
    |-- indx
    `-- inst

    The conversion from backend /proc/scsi_target/mib/ context output to configfs
    default groups+attributes include scsi_att_intr_port and scsi_auth_intr output
    from within individual:

    /sys/kernel/config/target/fabric/$WWN/tpgt_$TPGT/acls/$INITIATOR_WWN/lun_$LUN_ID/statistics/

    The legacy procfs output now appear as individual configfs attributes under:

    *) acls/$INITIATOR_WWN/lun_$LUN_ID/statistics/scsi_att_intr_port

    |-- dev
    |-- indx
    |-- inst
    |-- port
    |-- port_auth_indx
    `-- port_ident

    *) acls/$INITIATOR_WWN/lun_$LUN_ID/statistics/scsi_auth_intr

    |-- att_count
    |-- creation_time
    |-- dev
    |-- dev_or_port
    |-- hs_num_cmds
    |-- indx
    |-- inst
    |-- intr_name
    |-- map_indx
    |-- num_cmds
    |-- port
    |-- read_mbytes
    |-- row_status
    `-- write_mbytes

    Also, this includes adding struct target_fabric_configfs_template->
    tfc_wwn_fabric_stats_cit and ->tfc_tpg_nacl_stat_cit respectively for
    use during target_core_fabric_configfs.c:target_fabric_setup_cits()

    Signed-off-by: Nicholas A. Bellinger
    Signed-off-by: James Bottomley

    Nicholas Bellinger
     

15 Jan, 2011

1 commit

  • c66ac9db8   [SCSI] target: Add LIO target core v4.0.0-rc6 ... Browse Code »

    LIO target is a full featured in-kernel target framework with the
    following feature set:

    High-performance, non-blocking, multithreaded architecture with SIMD
    support.

    Advanced SCSI feature set:

    * Persistent Reservations (PRs)
    * Asymmetric Logical Unit Assignment (ALUA)
    * Protocol and intra-nexus multiplexing, load-balancing and failover (MC/S)
    * Full Error Recovery (ERL=0,1,2)
    * Active/active task migration and session continuation (ERL=2)
    * Thin LUN provisioning (UNMAP and WRITE_SAMExx)

    Multiprotocol target plugins

    Storage media independence:

    * Virtualization of all storage media; transparent mapping of IO to LUNs
    * No hard limits on number of LUNs per Target; maximum LUN size ~750 TB
    * Backstores: SATA, SAS, SCSI, BluRay, DVD, FLASH, USB, ramdisk, etc.

    Standards compliance:

    * Full compliance with IETF (RFC 3720)
    * Full implementation of SPC-4 PRs and ALUA

    Significant code cleanups done by Christoph Hellwig.

    [jejb: fix up for new block bdev exclusive interface. Minor fixes from
    Randy Dunlap and Dan Carpenter.]
    Signed-off-by: Nicholas A. Bellinger
    Signed-off-by: James Bottomley

    Nicholas Bellinger