From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Greetings all,
This series contains patches to unify TCM virtual subsystem plugin emulation
logic into generic TCM code, and to provide a method of emulation for control
CDBs that are emulated generically across subsystem plugin code or that may
require CDB specific context in the new struct se_subsystem_api_cdb set of
subsystem dependent CDB callers.
The first patch adds a generic function transport_emulate_control_cdb()
which is intended used by virtual subsystem plugin code. This includes
the primary list of CDBs handled in this manner from existing IBLOCK,
FILEIO and RAMDISK *_emulate_scsi_cdb() subsystem dependent code, and the
struct se_subsystem_api_cdb define described above.
Thse second patch converts IBLOCK, FILEIO and RAMDISK subsystem code to use
the new ->emulate_inquiry(), ->emulate_read_cap(), ->emulate_read_cap16() and
->emulate_unmap() callers their respective existing subsystem dependent logic.
The third and forth patches move WRITE_SAME_* and SYNCHRONIZE_CACHE_* CDB
emulation logic into transport_emulate_control_cdb() for these two originally
specially handled cases with IBLOCK and FILEIO subsystem code.
So far this code has been tested on TCM_Loop SCSI LUN with IBLOCK, FILEIO and
IBLOCK backstores with TPU=1, TPWS=1 and WCE=1 on v2.6.36-rc6.
Many thanks go out to Christoph for a bit of friendly prodding to finally make
this conversion happen. Thanks hch!
Signed-off-by: Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx>
Nicholas Bellinger (4):
tcm: Unify subsystem plugin control CDB emulation
tcm: Convert IBLOCK, FILEIO and RAMDISK subsystem code to
transport_emulate_control_cdb()
tcm: Move WRITE_SAME_* emulation into transport_emulate_control_cdb()
tcm: Move SYNCHRONIZE_CACHE_* emulation into
transport_emulate_control_cdb()
drivers/target/target_core_file.c | 163 ++++++++------------------
drivers/target/target_core_iblock.c | 102 +++-------------
drivers/target/target_core_rd.c | 91 ++-------------
drivers/target/target_core_transport.c | 200 ++++++++++++++++++++++----------
include/target/target_core_base.h | 4 +-
include/target/target_core_transport.h | 26 +++-
6 files changed, 237 insertions(+), 349 deletions(-)
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