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* target: simplify target_xcopy_init_pt_lunChristoph Hellwig2015-04-081-23/+9Star
| | | | | | | Drop unused argument & return value and consolidate a duplicate assignment. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: remove the unused SCF_CMD_XCOPY_PASSTHROUGH flagChristoph Hellwig2015-04-082-3/+2Star
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/rd: reduce code duplication in rd_execute_rw()Akinobu Mita2015-04-081-34/+32Star
| | | | | | | | | | | | | | | | | Factor out code duplication in rd_execute_rw() into a helper function rd_do_prot_rw(). This change is required to minimize the forthcoming fix in rd_do_prot_rw(). (Fix up v4.1 for-next fuzz - nab) Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Sagi Grimberg <sagig@dev.mellanox.co.il> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: target-devel@vger.kernel.org Cc: linux-scsi@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* tcm_loop: fixup tpgt string to integer conversionMing Lin2015-04-081-8/+6Star
| | | | | | | | | | Currently, for example, mkdir "tpgt_xyz" doesn't return error. mkdir /sys/kernel/config/target/loopback/naa.60014055f195952b/tpgt_xyz Replace obsoleted simple_strtoul with kstrtoul and check the conversion. Signed-off-by: Ming Lin <mlin@kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Bump version to 1.0Sagi Grimberg2015-04-081-1/+1
| | | | | Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Remove conn_ prefix from struct isert_conn membersSagi Grimberg2015-04-082-148/+148
| | | | | | | | These variables are always accessed via struct isert_conn so no need to have a "conn_" prefix for them. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Remove un-needed rdma_listen backlogSagi Grimberg2015-04-082-2/+1Star
| | | | | | | | | | | | | iser target can handle as many connect request as the fabric sends to it. This backlog should not set as a back-pressure mechanism (which is not very useful). isert does need a back-pressure mechanism, but it should be added in isert by monitoring the number of pending established connections (will be added in a later stage). Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Remove redundant check on the deviceSagi Grimberg2015-04-081-4/+5
| | | | | | | | | In iser_connect_release there is no chance that the iser device is set to NULL, if this happens we have a BUG. So use BUG_ON. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Get rid of redundant max_acceptSagi Grimberg2015-04-081-4/+2Star
| | | | | | | | | Not sure what it was used for, but there is no real need for it now as I see it. Go ahead and get rid of it. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Split some logic in isert_connect_request to routinesSagi Grimberg2015-04-081-48/+70
| | | | | | | | | | | Move login buffer alloc/free code to dedicated routines and introduce isert_conn_init which initializes the connection lists and locks. Simplifies and cleans up the code a little bit. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Rename device find/release routinesSagi Grimberg2015-04-081-7/+6Star
| | | | | | | | isert_device_find_by_ib_dev and isert_device_try_release can have a better, more common name like isert_device_[get|put]. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Rename rend/recv completion routinesSagi Grimberg2015-04-081-5/+6
| | | | | | | Make receive/send completion handling routines symmetrical. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Remove redundant assignment to local variableSagi Grimberg2015-04-081-3/+2Star
| | | | | | | No need to keep a local ib_dev as a device pointer. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Introduce isert_[alloc|free]_compsSagi Grimberg2015-04-081-46/+60
| | | | | | | | Move the code for completion context handling to dedicated routines. This simplifies the code and removes code duplication. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Split isert_setup_qpSagi Grimberg2015-04-081-14/+42
| | | | | | | | Simplify iser QP creation by splitting some unrelated logic bulks to routines. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Remove redundant casting on void pointersSagi Grimberg2015-04-081-16/+16
| | | | | | | No need to cast void pointers. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Remove redundant local variableSagi Grimberg2015-04-081-2/+1Star
| | | | | | | No need for this assignment. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Remove dead codeSagi Grimberg2015-04-081-1/+0Star
| | | | | | | unmap_list is unused. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Remove redundant check on recv completionSagi Grimberg2015-04-081-4/+0Star
| | | | | | | We have a switch default for this. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Use a single DMA MR and PD per deviceSagi Grimberg2015-04-082-48/+55
| | | | | | | | | | | This is to favor the HCA cache hit rate using less MRs and PDs. This commit partially reverts commit: "eb6ab13 IB/isert: separate connection protection domains and dma MRs" At the time I thought this would be needed. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Fix possible deadlock in RDMA_CM connection errorSagi Grimberg2015-04-081-5/+9
| | | | | | | | | | | Before we reach to connection established we may get an error event. In this case the core won't teardown this connection (never established it), so we take care of freeing it ourselves. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Cc: <stable@vger.kernel.org> # v3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iser-target: Fix session hang in case of an rdma read DIF errorSagi Grimberg2015-04-081-2/+4
| | | | | | | | | | | This hang was a result of a missing command put when a DIF error occurred during a rdma read (and we sent an CHECK_CONDITION error without passing it to the backend). Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Cc: <stable@vger.kernel.org> # v3.14+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsi/iser-target: Add fabric_prot_type attribute supportNicholas Bellinger2015-04-084-0/+44
| | | | | | | | | | | | | | | | This patch updates iscsi/iser-target to add a new fabric_prot_type TPG attribute for iser-target, used for controlling LLD level protection into LIO when the backend device does not support T10-PI. This is required for ib_isert to enable WRITE_STRIP + READ_INSERT hardware offloads. It's disabled by default and controls which se_sesion->sess_prot_type are set at iscsi_target_locate_portal() session registration time. Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Martin Petersen <martin.petersen@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* tcm_qla2xxx: Add fabric_prot_type attribute supportNicholas Bellinger2015-04-082-0/+45
| | | | | | | | | | | | | | | | | | | | This patch updates qla2xxx target to add a new fabric_prot_type TPG attribute, used for controlling LLD level protection into LIO when the backend device does not support T10-PI. This is required for qla_target.c to enable WRITE_STRIP + READ_INSERT hardware offloads. It's disabled by default and controls which se_sesion->sess_prot_type are set at tcm_qla2xxx_check_initiator_node_acl() session registration time. Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Saurav Kashyap <saurav.kashyap@qlogic.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* tcm_qla2xxx: Set TARGET_PROT_ALL for sup_prot_opsNicholas Bellinger2015-04-081-1/+1
| | | | | | | | | | | | | | | This patch adds the missing TARGET_PROT_ALL when initializing a new session and declaring the capable se_sess->sup_prot_ops for T10-PI. This is required in order to function with existing qla_target.c DIF protection offload support. Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Saurav Kashyap <saurav.kashyap@qlogic.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* vhost/scsi: Add fabric_prot_type attribute supportNicholas Bellinger2015-04-081-1/+51
| | | | | | | | | | | | | | | | | This patch updates vhost-scsi to add a new fabric_prot_type TPG attribute, used for controlling LLD level protection into LIO when the backend device does not support T10-PI. This is required for vhost-scsi to enable WRITE_STRIP + READ_INSERT operations using software emulation + crct10dif instruction offload. It's disabled by default and controls which se_sesion->sess_prot_type are set at vhost_scsi_make_nexus() session registration time. Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* loopback: Add fabric_prot_type attribute supportNicholas Bellinger2015-04-082-2/+53
| | | | | | | | | | | | | | This patch updates loopback to add a new fabric_prot_type TPG attribute, used for controlling LLD level protection into LIO when the backend device does not support T10-PI. Also, go ahead and set DIN_PASS + DOUT_PASS so target-core knows that it will be doing any WRITE_STRIP and READ_INSERT operations. Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/rd: Add checks for backend DIF emulationNicholas Bellinger2015-04-081-2/+4
| | | | | | | | | Make sure that RAMDISK only attempts to use backend DIF emulation when it's actually enabled at device level. Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/iblock: Add checks for backend DIF emulationNicholas Bellinger2015-04-081-1/+1
| | | | | | | | | | Make sure that IBLOCK only attempts to use backend DIF emulation when it's actually enabled at device level. Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/file: Add checks for backend DIF emulationNicholas Bellinger2015-04-081-4/+4
| | | | | | | | | | Make sure that FILEIO only attempts to use backend DIF emulation when it's actually enabled at device level. Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Add internal READ_INSERT supportNicholas Bellinger2015-04-081-0/+6
| | | | | | | | | | | | | | This patch adds READ_INSERT support in target_read_prot_action() that invokes sbc_dif_generate() when LIO is responsible for generating the outgoing T10-PI. Required for supporting fabrics that exchange protection information, and would like to function with un-protected devices. Reviewed-by: Martin Petersen <martin.petersen@oracle.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Move cmd->prot_op check into target_read_prot_actionNicholas Bellinger2015-04-081-8/+13
| | | | | | | | | | | This patch moves the existing target_complete_ok_work() check for cmd->prot_op into it's own function, so it's easier to add future support for READ INSERT. Reviewed-by: Martin Petersen <martin.petersen@oracle.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Add internal WRITE_STRIP supportNicholas Bellinger2015-04-082-0/+19
| | | | | | | | | | | | | | | | | | | This patch adds WRITE_STRIP support in target_write_prot_action() that invokes sbc_dif_verify_write() for checking T10-PI metadata before submitting the I/O to a backend driver. Upon verify failure, the specific sense code is propigated up the failure path up to transport_generic_request_failure(). Also, update sbc_dif_verify_write() to only perform the subsequent protection metadata copy when a valid *sg is passed. (Use ilog2 instead of division and unlikely for pi_err - Sagi) Reviewed-by: Martin Petersen <martin.petersen@oracle.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Move cmd->prot_op check into target_write_prot_actionNicholas Bellinger2015-04-081-9/+22
| | | | | | | | | | | | | This patch moves the existing target_execute_cmd() check for cmd->prot_op into it's own function, so it's easier to add future support for WRITE STRIP. (Use better target_write_prot_action name - Sagi) Reviewed-by: Martin Petersen <martin.petersen@oracle.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Update SPC/SBC emulation for sess_prot_typeNicholas Bellinger2015-04-082-7/+20
| | | | | | | | | | | | | | | This patch updates standard INQUIRY, INQUIRY EVPD=0x86, READ_CAPACITY_16 and control mode pages to use se_sess->sess_prot_type when determing which type of T10-PI related feature bits can be exposed. This is required for fabric sessions supporting T10-PI metadata to backend devices that don't have protection enabled. Reviewed-by: Martin Petersen <martin.petersen@oracle.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Doug Gilbert <dgilbert@interlog.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Add protected fabric + unprotected device supportNicholas Bellinger2015-04-084-11/+50
| | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a new target_core_fabric_ops callback for allowing fabric drivers to expose a TPG attribute for signaling when a T10-PI protected fabric wants to function with an un-protected device without T10-PI. This specifically is to allow LIO to perform WRITE_STRIP + READ_INSERT operations when functioning with non T10-PI enabled devices, seperate from any available hw offloads the fabric supports. This is done using a new se_sess->sess_prot_type that is set at fabric session creation time based upon the TPG attribute. It currently cannot be changed for individual sessions after initial creation. Also, update existing target_core_sbc.c code to honor sess_prot_type when setting up cmd->prot_op + cmd->prot_type assignments. (Add unlikely and !! boolean conversion in sbc_check_prot - Sagi) Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Doug Gilbert <dgilbert@interlog.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Convert DIF emulation to use cmd->prot_typeNicholas Bellinger2015-04-081-6/+7
| | | | | | | | | | | | | This patch changes existing DIF emulation to check the command descriptor's prot_type, instead of what the backend device is exposing in pi_prot_type. Since this value is already set in sbc_check_prot(), go ahead and use it to allow protected fabrics to function with unprotected devices. Reviewed-by: Martin Petersen <martin.petersen@oracle.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: add missing __user annotationsChristoph Hellwig2015-03-261-2/+4
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: add missing sense_reason_t annotationsChristoph Hellwig2015-03-263-3/+3
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: add __releases annotation to target_release_cmd_krefChristoph Hellwig2015-03-261-0/+1
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: mark iscsit_start_kthreads staticChristoph Hellwig2015-03-261-1/+1
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: mark tcm_loop_primary staticChristoph Hellwig2015-03-261-1/+1
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: move external declarations to a headersChristoph Hellwig2015-03-262-9/+7Star
| | | | | | | | We should not declare extrnal .c symbols in C files to make sure they match the actual prototype, and sparse correctly warns about this. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Better handling of AllRegistrants reservationsIlias Tsitsimpis2015-03-261-11/+19
| | | | | | | | | | | | | | | Fix AllRegistrants reservations in register_and_move() function where the code didn't handle all of the registered devices as reservation holders, resulting in the wrong warning message being displayed. At the same time, introduce a helper function named 'is_reservation_holder()' that properly checks if a device is a reservation holder, taking into account the reservation type. This function cleans up the code and improves readability. Signed-off-by: Ilias Tsitsimpis <iliastsi@arrikto.com> Signed-off-by: Vangelis Koukis <vkoukis@arrikto.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsi-target: Drop legacy iscsi_target_tq.c logicNicholas Bellinger2015-03-268-590/+2Star
| | | | | | | | | | | | | | Now that iscsi_conn allocates new [rx,tx] threads using kthread.h primitives on the fly, and kthread_stop() is called directly during connection shutdown, it's time to go ahead and drop iscsi_target_tq.c legacy code. The use of multiple struct completion in iscsi_activate_thread_set() has been proven to cause issues during repeated iser login/logout. Tested-by: Sagi Grimberg <sagig@mellanox.com> Cc: Slava Shwartsman <valyushash@gmail.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsi-target: Convert iscsi_thread_set usage to kthread.hNicholas Bellinger2015-03-264-69/+114
| | | | | | | | | | | | | | | | | | | | This patch converts iscsi-target code to use modern kthread.h API callers for creating RX/TX threads for each new iscsi_conn descriptor, and releasing associated RX/TX threads during connection shutdown. This is done using iscsit_start_kthreads() -> kthread_run() to start new kthreads from within iscsi_post_login_handler(), and invoking kthread_stop() from existing iscsit_close_connection() code. Also, convert iscsit_logout_post_handler_closesession() code to use cmpxchg when determing when iscsit_cause_connection_reinstatement() needs to sleep waiting for completion. Reported-by: Sagi Grimberg <sagig@mellanox.com> Tested-by: Sagi Grimberg <sagig@mellanox.com> Cc: Slava Shwartsman <valyushash@gmail.com> Cc: <stable@vger.kernel.org> # v3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsi-target: don't export static symbolJulia Lawall2015-03-201-1/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | The semantic patch that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ type T; identifier f; @@ static T f (...) { ... } @@ identifier r.f; declarer name EXPORT_SYMBOL; @@ -EXPORT_SYMBOL(f); // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Convert fabric module autoload failures to pr_debugNicholas Bellinger2015-03-201-8/+8
| | | | | | | | | This patch converts the fabric module autoload failures from pr_err to pr_debug in target_core_register_fabric() code, to reduce the amount of noise during normal operation. Reported-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* tcm_qla2xxx: Expose per endpoint dynamic_sessions attributeNicholas Bellinger2015-03-071-0/+10
| | | | | | | | | | | This patch exposes a new ../qla2xxx*/$WWPN/$TPGT/dynamic_sessions attribute to dump the currently active sessions by FC initiator WWPN that have been created with dynamically generated se_node_acls. This information is useful so that user-space can optionally perform dynamic -> explicit NodeACL conversion based on $INITIATOR_WWPN. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* iscsi-target: Expose per endpoint dynamic_sessions attributeNicholas Bellinger2015-03-071-0/+10
| | | | | | | | | | | This patch exposes a new ../iscsi/$IQN/$TPGT/dynamic_sessions attribute to dump the currently active sessions by iSCSI InitiatorName that have been created with dynamically generated se_node_acls. This information is useful so that user-space can optionally perform dynamic -> explicit NodeACL conversion based on $INITIATOR_WWPN. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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