From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> Hi Folks, This series is first RFC for iSCSI Extentions for RDMA (ISER) target support with existing iscsi-target TCP based socket code for a future v3.10 merge. This code is available in git here: git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending.git iser_target-rfcv1 Ths includes a basic iscsit_transport API that allows different transports to reside under a single iscsi-target configfs control plane, using an pre-defined network portal attribute to enable a rdma_cm listener on top of existing ipoib portals. The review patches are broken down into: Patch #1 -> #3 include iscsi-target API template, conversion of iscsi/tcp login path to use API template, plus add iser RFC parameter keys. Patch #4 -> #5 allow external iscsi_cmd descriptor allocation / free, and refactoring of RX side PDU request handling to allow incoming PDU logic to be called by external ib_isert workqueue process context. Patch #6 allows iscsi-target to use per transport API template immediate / response callbacks in the per-connection TX thread completion path, and refactoring of response PDU creation for export to external ib_isert code. Patch #7 adds the pre-defined iser network portal attribute under the existing iscsi-target configfs tree. Patch #8 -> #11 is the external ib_isert.ko module code seperated into individual commits for review. So at this point this code is functional and pushing sustained RDMA_WRITE + RDMA_READ traffic using open-iscsi on top of v3.8-rc7 code. Thus far we're using Mellanox IB HCAs for initial development, and will be verfiying using RCoE capable NICs as well in the near future. Note there are still plently of performance tuning, active I/O shutdown testing, and various exception path hardening left to be done over the upcoming weeks. The branch at target-pending.git/iser_target-wip will be updated as review comments + regressions + new bugs are addressed. Many thanks to Or Gerlitz and Mellanox for their support. Thank you, --nab Nicholas Bellinger (11): iscsi-target: Add iscsit_transport API template iscsi-target: Initial traditional TCP conversion to iscsit_transport iscsi-target: Add iser-target parameter keys + setup during login iscsi-target: Add per transport iscsi_cmd alloc/free iscsi-target: Refactor RX PDU logic + export request PDU handling iscsi-target: Refactor TX queue logic + export response PDU creation iscsi-target: Add iser network portal attribute iser-target: Add base + proto includes iser-target: Add logic for verbs iser-target: Add logic for core iser-target: Add Makefile + Kconfig drivers/infiniband/Kconfig | 1 + drivers/infiniband/Makefile | 1 + drivers/infiniband/ulp/isert/Kconfig | 6 + drivers/infiniband/ulp/isert/Makefile | 5 + drivers/infiniband/ulp/isert/isert_base.h | 123 ++ drivers/infiniband/ulp/isert/isert_core.c | 1720 ++++++++++++++++++++++++ drivers/infiniband/ulp/isert/isert_core.h | 12 + drivers/infiniband/ulp/isert/isert_proto.h | 47 + drivers/infiniband/ulp/isert/isert_verbs.c | 476 +++++++ drivers/infiniband/ulp/isert/isert_verbs.h | 5 + drivers/target/iscsi/Makefile | 3 +- drivers/target/iscsi/iscsi_target.c | 1119 +++++++++------- drivers/target/iscsi/iscsi_target.h | 1 + drivers/target/iscsi/iscsi_target_configfs.c | 75 + drivers/target/iscsi/iscsi_target_core.h | 25 +- drivers/target/iscsi/iscsi_target_device.c | 1 + drivers/target/iscsi/iscsi_target_erl1.c | 8 +- drivers/target/iscsi/iscsi_target_login.c | 466 +++++-- drivers/target/iscsi/iscsi_target_login.h | 6 + drivers/target/iscsi/iscsi_target_nego.c | 185 +--- drivers/target/iscsi/iscsi_target_nego.h | 11 +- drivers/target/iscsi/iscsi_target_parameters.c | 87 ++- drivers/target/iscsi/iscsi_target_parameters.h | 16 +- drivers/target/iscsi/iscsi_target_tmr.c | 1 + drivers/target/iscsi/iscsi_target_tpg.c | 6 +- drivers/target/iscsi/iscsi_target_transport.c | 57 + drivers/target/iscsi/iscsi_target_util.c | 62 +- drivers/target/iscsi/iscsi_target_util.h | 2 + include/target/iscsi/iscsi_transport.h | 77 ++ 29 files changed, 3803 insertions(+), 801 deletions(-) create mode 100644 drivers/infiniband/ulp/isert/Kconfig create mode 100644 drivers/infiniband/ulp/isert/Makefile create mode 100644 drivers/infiniband/ulp/isert/isert_base.h create mode 100644 drivers/infiniband/ulp/isert/isert_core.c create mode 100644 drivers/infiniband/ulp/isert/isert_core.h create mode 100644 drivers/infiniband/ulp/isert/isert_proto.h create mode 100644 drivers/infiniband/ulp/isert/isert_verbs.c create mode 100644 drivers/infiniband/ulp/isert/isert_verbs.h create mode 100644 drivers/target/iscsi/iscsi_target_transport.c create mode 100644 include/target/iscsi/iscsi_transport.h -- 1.7.2.5 -- 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
