This is open-iscsi/linux-iscsi-5 Initiator. This submission is ready for inclusion into mainline kernel. It contains: - iscsi data path (iscsi_tcp) - iscsi transport class (scsi_transport_iscsi). This Initiator depends on this transport class, but not vice versa: the transport class is common, generic, and isolated from this concrete iscsi implementation by scsi_transport_iscsi.h interface (see the header file and/or diagrams on the open-iscsi website). Initiator's control plane (supplied separately at http://www.open-iscsi.org/index.html#download) also does not depend on iscsi_tcp data path implementation - it's multi-transport capability is ensured by the the transport class itself. Changes since 05/05/05 submission (http://marc.theaimsgroup.com/?l=linux-kernel&m=111526765118450&w=2) ======================== * Stability: fixed a number of races between eh_abort(), conn_destroy(), abort timeout, etc. * Performance improvements. * Internally reviewed and cleaned up all the code, to the best of our ability. * Exported transport and session/connection information via sysfs. * Removed not-greater-than-page-size restriction; should be able to support applications using sg (tested) and presumably, st as well. Tarball ==== The entire Initiator source including user space tools is available at http://www.open-iscsi.org/index.html#download and/or svn (svn.berlios.de/open-iscsi, r363). The same tarball can be downloaded from the linux-iscsi project page on sourceforge at http://sourceforge.net/project/shownotes.php?release_id=331731 Thanks ====== Many people contributed to testing. In particular, special thanks to: Pascal Renauld, Harald Kubota, Olivier Galibert, Arne Redlich. Changelog ======== * misleading printout in top-level Makefile fixed * new ITT encoding implemented, should protect us from not well behaved targets * ctask->in_progress state machine depricated. using direct PDU header processing * using eh_host_reset_handler() to unjam iscsi session in case of interface fluks * more verificiation done before r2t response processing * recovery: ctask->SCp.Status deprecated, using ctask->sc (NULL/not NULL) instead * Mike: scsi_transport_iscsi.h copyright cleanup * Mike: minor coding style cleanup * Mike: fixed the error path when session class was not being unregistered * conn_stop() vs. eh_abort(): ctask->sc serialization via xmitsema * Mike: iscsi_tcp: remove extra tabs * fixed race between conn_destroy() and eh_abort() * properly flushing r2tqueue and stopping ctask from being xmited after TMF Abort * Mike: data_recv tabs cleanup * Mike: dockbook style comments * Mike: rm underscore in labels to match rest of driver * fixed limitation on number of scattered PDUs across SKBs. Discovered by Harald. * Mike: fixed some weird braces where locks would never get dropped if run and tabing * session->state is no longer volatile, since we always access it under lock * session->generation is not longer volatile; renamed as session->age * Mike: add kernel printk values * Mike: rm extra module get/put call * regression.sh: each test-case now tested with fdisk+mkfs+bonnie * Mike: do copyright per line * Mike: merge iscsi_ifev.h and iscsi_if.h * Mike: rm iscsi_iftrans.h and move include of scsi_transport_iscsi.h * fixed iscsi_ctask_copy() buffer length bug (observed when using bonnie++ as a part of regression.sh) * Mike: rm extra braces and add a space between var declarations and code * enabling data digest causes lock-up (Arne Redlich) * Mike: whitespaces cleanup * Mike: coding style cleanup * Mike: rm extra brace and mv invalid param test * "un-volatile" tmabort_state (volatile is not needed) * remved session->conn_lock * "un-volatile" conn->c_stage * "un-volatile" conn->stop_stage * Wang Zhenyu: [io]fmarket typo fix * regression introduced in r341: fixed now * send_pdu(): use xmit semaphore, now serialized vs. data_xmit() * removed: conn->cpu and the (dead) code * data_xmit_more(): cleaned up and moved to the data_xmit() * comments in the iscsi_tcp.h in particular: conn->xmitsema, session->lock * Mike: remove the ISCSI_TRANSPORT_MAX limitation from the kernel using sysfs * updated to the recent transport class changes backward-compile-2.6.11.patch * fixed gcc4 compilation warnings * Mike: don't hold session->lock when deleting timer with del_timer_sync() * Mike: don't hold xmitsema while waiting for host_busy to decrement * Mike: deadlock fix: cannot call del_timer sync with session_lock held * propagating transport->caps up to the daemon, fixes DATA_DIGEST nego bug * adding max_conn, max_cmd_len and max_lun attributes for iscsi_transport * force eh_abort to unblock while in conn_destroy() waiting * fail host_reset() in case of session terminated * iscsiadm crash fix when transport capability does not match * connection struct: re-aligned Tx members with Tx, Rx with Rx * connection suspend: split Tx and Rx suspend, cleanup * fixed eh_abort/conn_stop() race: clear/set conn->sock under lock * removed restriction: sg element <= PAGE_SIZE * removed restriction: non scatter/gather request <= PAGE_SIZE Patches ===== 1. iscsi-tcp.c.patch - drivers/scsi/iscsi_tcp.c, iscsi data path. This is ~3000 lines 84K file, if it does not make it through, I'll split and resend. In addition, this file is available at http://www.open-iscsi.org/src/iscsi_tcp.c 2. iscsi-tcp.h.patch - drivers/scsi/iscsi_tcp.h, header file. 3. common-iscsi-headers.patch - common header files: - iscsi_if.h (user/kernel #defines and user/kernel events); - iscsi_proto.h (RFC3720 #defines and types); - scsi_transport_iscsi.h (transport API, transport #defines and types). 4. iscsi-netlink.patch - include/linux/netlink.h changes (added new protocol NETLINK_ISCSI). 5. iscsi-Makefile.patch - drivers/scsi/Makefile changes. 6. iscsi-transport.patch - new iscsi transport class (drivers/scsi/scsi_transport_iscsi.c) 7. iscsi-Kconfig.patch - drivers/scsi/Kconfig changes. Thanks, Linux-iscsi Team - : 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
