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path: root/drivers/target/target_core_transport.c
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* target: Fix residual overflow handling in target_complete_cmd_with_lengthSumit Rai2016-07-231-1/+15
| | | | | | | | | | | | | | | This patch fixes residual overflow handling to correctly set the residual_count using SPDTL, instead of SCSI Allocation Length. Allocation Length is the maximum value of the SPDTL and not substitute for it, hence it shouldn’t be used to calculate ResidualCount except for cases where SPDTL > Allocation Length and Data is truncated (in that case both Alloc Len and SPDTL are same). (SPC 5r01 Section 4.2.5.6). Thanks to Ajay Nair in assisting with this patch. Signed-off-by: Sumit Rai <sumitrai96@gmail.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix ordered task CHECK_CONDITION early exception handlingNicholas Bellinger2016-07-201-1/+6
| | | | | | | | | | | | | | | | | | | | | | If a Simple command is sent with a failure, target_setup_cmd_from_cdb returns with TCM_UNSUPPORTED_SCSI_OPCODE or TCM_INVALID_CDB_FIELD. So in the cases where target_setup_cmd_from_cdb returns an error, we never get far enough to call target_execute_cmd to increment simple_cmds. Since simple_cmds isn't incremented, the result of the failure from target_setup_cmd_from_cdb causes transport_generic_request_failure to decrement simple_cmds, due to call to transport_complete_task_attr. With this dev->simple_cmds or dev->dev_ordered_sync is now -1, not 0. So when a subsequent command with an Ordered Task is sent, it causes a hang, since dev->simple_cmds is at -1. Tested-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com> Signed-off-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com> Tested-by: Michael Cyr <mikecyr@linux.vnet.ibm.com> Signed-off-by: Michael Cyr <mikecyr@linux.vnet.ibm.com> Cc: stable@vger.kernel.org # 4.4+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix ordered task target_setup_cmd_from_cdb exception hangNicholas Bellinger2016-07-201-27/+35
| | | | | | | | | | | | | | | | | | | | | | | If a command with a Simple task attribute is failed due to a Unit Attention, then a subsequent command with an Ordered task attribute will hang forever. The reason for this is that the Unit Attention status is checked for in target_setup_cmd_from_cdb, before the call to target_execute_cmd, which calls target_handle_task_attr, which in turn increments dev->simple_cmds. However, transport_generic_request_failure still calls transport_complete_task_attr, which will decrement dev->simple_cmds. In this case, simple_cmds is now -1. So when a command with the Ordered task attribute is sent, target_handle_task_attr sees that dev->simple_cmds is not 0, so it decides it can't execute the command until all the (nonexistent) Simple commands have completed. Reported-by: Michael Cyr <mikecyr@linux.vnet.ibm.com> Tested-by: Michael Cyr <mikecyr@linux.vnet.ibm.com> Reported-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com> Tested-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com> Cc: stable@vger.kernel.org # 4.4+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix race between iscsi-target connection shutdown + ABORT_TASKNicholas Bellinger2016-07-201-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a race in iscsit_release_commands_from_conn() -> iscsit_free_cmd() -> transport_generic_free_cmd() + wait_for_tasks=1, where CMD_T_FABRIC_STOP could end up being set after the final kref_put() is called from core_tmr_abort_task() context. This results in transport_generic_free_cmd() blocking indefinately on se_cmd->cmd_wait_comp, because the target_release_cmd_kref() check for CMD_T_FABRIC_STOP returns false. To address this bug, make iscsit_release_commands_from_conn() do list_splice and set CMD_T_FABRIC_STOP early while holding iscsi_conn->cmd_lock. Also make iscsit_aborted_task() only remove iscsi_cmd_t if CMD_T_FABRIC_STOP has not already been set. Finally in target_release_cmd_kref(), only honor fabric_stop if CMD_T_ABORTED has been set. Cc: Mike Christie <mchristi@redhat.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Himanshu Madhani <himanshu.madhani@qlogic.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: stable@vger.kernel.org # 3.14+ Tested-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix missing complete during ABORT_TASK + CMD_T_FABRIC_STOPNicholas Bellinger2016-07-201-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During transport_generic_free_cmd() with a concurrent TMR ABORT_TASK and shutdown CMD_T_FABRIC_STOP bit set, the caller will be blocked on se_cmd->cmd_wait_stop completion until the final kref_put() -> target_release_cmd_kref() has been invoked to call complete(). However, when ABORT_TASK is completed with FUNCTION_COMPLETE in core_tmr_abort_task(), the aborted se_cmd will have already been removed from se_sess->sess_cmd_list via list_del_init(). This results in target_release_cmd_kref() hitting the legacy list_empty() == true check, invoking ->release_cmd() but skipping complete() to wakeup se_cmd->cmd_wait_stop blocked earlier in transport_generic_free_cmd() code. To address this bug, it's safe to go ahead and drop the original list_empty() check so that fabric_stop invokes the complete() as expected, since list_del_init() can safely be used on a empty list. Cc: Mike Christie <mchristi@redhat.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Himanshu Madhani <himanshu.madhani@qlogic.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: stable@vger.kernel.org # 3.14+ Tested-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* Merge branch 'for-next' of ↵Linus Torvalds2016-05-281-24/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "Here are the outstanding target pending updates for v4.7-rc1. The highlights this round include: - Allow external PR/ALUA metadata path be defined at runtime via top level configfs attribute (Lee) - Fix target session shutdown bug for ib_srpt multi-channel (hch) - Make TFO close_session() and shutdown_session() optional (hch) - Drop se_sess->sess_kref + convert tcm_qla2xxx to internal kref (hch) - Add tcm_qla2xxx endpoint attribute for basic FC jammer (Laurence) - Refactor iscsi-target RX/TX PDU encode/decode into common code (Varun) - Extend iscsit_transport with xmit_pdu, release_cmd, get_rx_pdu, validate_parameters, and get_r2t_ttt for generic ISO offload (Varun) - Initial merge of cxgb iscsi-segment offload target driver (Varun) The bulk of the changes are Chelsio's new driver, along with a number of iscsi-target common code improvements made by Varun + Co along the way" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (29 commits) iscsi-target: Fix early sk_data_ready LOGIN_FLAGS_READY race cxgbit: Use type ISCSI_CXGBIT + cxgbit tpg_np attribute iscsi-target: Convert transport drivers to signal rdma_shutdown iscsi-target: Make iscsi_tpg_np driver show/store use generic code tcm_qla2xxx Add SCSI command jammer/discard capability iscsi-target: graceful disconnect on invalid mapping to iovec target: need_to_release is always false, remove redundant check and kfree target: remove sess_kref and ->shutdown_session iscsi-target: remove usage of ->shutdown_session tcm_qla2xxx: introduce a private sess_kref target: make close_session optional target: make ->shutdown_session optional target: remove acl_stop target: consolidate and fix session shutdown cxgbit: add files for cxgbit.ko iscsi-target: export symbols iscsi-target: call complete on conn_logout_comp iscsi-target: clear tx_thread_active iscsi-target: add new offload transport type iscsi-target: use conn_transport->transport_type in text rsp ...
| * target: remove sess_kref and ->shutdown_sessionChristoph Hellwig2016-05-101-23/+0
| | | | | | | | | | | | | | | | Both of them are unused now that drivers handle any delayed session shutdown internally. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: make close_session optionalChristoph Hellwig2016-05-101-1/+2
| | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: remove acl_stopChristoph Hellwig2016-05-101-2/+2
| | | | | | | | | | | | | | | | Ensure we can use list_empty on the sess_acl_list to remove the need for this flag. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* | target: enhance and export target_alloc_sgl/target_free_sglChristoph Hellwig2016-05-131-14/+18
|/ | | | | | | | | | | | The SRP target driver will need to allocate and chain it's own SGLs soon. For this export target_alloc_sgl, and add a new argument to it so that it can allocate an additional chain entry that doesn't point to a page. Also export transport_free_sgl after renaming it to target_free_sgl to free these SGLs again. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
* target: Fix target_release_cmd_kref shutdown comp leakHimanshu Madhani2016-03-221-2/+0
| | | | | | | | | | | | | | | | | | | This patch fixes an active I/O shutdown bug for fabric drivers using target_wait_for_sess_cmds(), where se_cmd descriptor shutdown would result in hung tasks waiting indefinitely for se_cmd->cmd_wait_comp to complete(). To address this bug, drop the incorrect list_del_init() usage in target_wait_for_sess_cmds() and always complete() during se_cmd target_release_cmd_kref() put, in order to let caller invoke the final fabric release callback into se_cmd->se_tfo->release_cmd() code. Reported-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Tested-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Cc: stable@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Avoid DataIN transfers for non-GOOD SAM statusNicholas Bellinger2016-03-101-0/+8
| | | | | | | | | | | | | | | | | | | | | | | This patch modifies existing transport_complete_*() code to avoid invoking target_core_fabric_ops->queue_data_in() driver callbacks for I/O READs with non-GOOD SAM status. Some initiators expect GOOD status when a DATA-IN payload transfer is involved, so to be safe go ahead and always invoke target_core_fabric_ops->queue_status() to generate fabric responses instead. Note this is a prerequisite for IBLOCK supporting retriable status, so SAM_STAT_BUSY + SAM_STAT_TASK_SET_FULL always generates fabric driver responses instead of initiating DataIN payload transfer when non-GOOD status is present Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Andy Grover <agrover@redhat.com> Cc: Mike Christie <mchristi@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Add target_alloc_session() helper functionNicholas Bellinger2016-02-271-0/+56
| | | | | | | | | | | | | Based on HCH's original patch, this adds a full version to support percpu-ida tag pre-allocation and callback function pointer into fabric driver code to complete session setup. Reported-by: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/transport: add flag to indicate CPU Affinity is observedQuinn Tran2016-02-101-3/+9
| | | | | | | | | Signed-off-by: Quinn Tran <quinn.tran@qlogic.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Fixes: fb3269b ("qla2xxx: Add selective command queuing") Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Drop legacy se_cmd->task_stop_comp + REQUEST_STOP usageNicholas Bellinger2016-02-061-37/+0
| | | | | | | | | | | | | | | With CMD_T_FABRIC_STOP + se_cmd->cmd_wait_set usage in place, go ahead and drop left-over CMD_T_REQUEST_STOP checks in target_complete_cmd() and unused target_stop_cmd(). Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Himanshu Madhani <himanshu.madhani@qlogic.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Andy Grover <agrover@redhat.com> Cc: Mike Christie <mchristi@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix race with SCF_SEND_DELAYED_TAS handlingNicholas Bellinger2016-02-061-12/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a race between setting of SCF_SEND_DELAYED_TAS in transport_send_task_abort(), and check of the same bit in transport_check_aborted_status(). It adds a __transport_check_aborted_status() version that is used by target_execute_cmd() when se_cmd->t_state_lock is held, and a transport_check_aborted_status() wrapper for all other existing callers. Also, it handles the case where the check happens before transport_send_task_abort() gets called. For this, go ahead and set SCF_SEND_DELAYED_TAS early when necessary, and have transport_send_task_abort() send the abort. Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Himanshu Madhani <himanshu.madhani@qlogic.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Andy Grover <agrover@redhat.com> Cc: Mike Christie <mchristi@redhat.com> Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix remote-port TMR ABORT + se_cmd fabric stopNicholas Bellinger2016-02-051-35/+110
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To address the bug where fabric driver level shutdown of se_cmd occurs at the same time when TMR CMD_T_ABORTED is happening resulting in a -1 ->cmd_kref, this patch adds a CMD_T_FABRIC_STOP bit that is used to determine when TMR + driver I_T nexus shutdown is happening concurrently. It changes target_sess_cmd_list_set_waiting() to obtain se_cmd->cmd_kref + set CMD_T_FABRIC_STOP, and drop local reference in target_wait_for_sess_cmds() and invoke extra target_put_sess_cmd() during Task Aborted Status (TAS) when necessary. Also, it adds a new target_wait_free_cmd() wrapper around transport_wait_for_tasks() for the special case within transport_generic_free_cmd() to set CMD_T_FABRIC_STOP, and is now aware of CMD_T_ABORTED + CMD_T_TAS status bits to know when an extra transport_put_cmd() during TAS is required. Note transport_generic_free_cmd() is expected to block on cmd->cmd_wait_comp in order to follow what iscsi-target expects during iscsi_conn context se_cmd shutdown. Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Himanshu Madhani <himanshu.madhani@qlogic.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Andy Grover <agrover@redhat.com> Cc: Mike Christie <mchristi@redhat.com> Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
* target: Fix LUN_RESET active TMR descriptor handlingNicholas Bellinger2016-02-031-0/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a NULL pointer se_cmd->cmd_kref < 0 refcount bug during TMR LUN_RESET with active TMRs, triggered during se_cmd + se_tmr_req descriptor shutdown + release via core_tmr_drain_tmr_list(). To address this bug, go ahead and obtain a local kref_get_unless_zero(&se_cmd->cmd_kref) for active I/O to set CMD_T_ABORTED, and transport_wait_for_tasks() followed by the final target_put_sess_cmd() to drop the local ->cmd_kref. Also add two new checks within target_tmr_work() to avoid CMD_T_ABORTED -> TFO->queue_tm_rsp() callbacks ahead of invoking the backend -> fabric put in transport_cmd_check_stop_to_fabric(). For good measure, also change core_tmr_release_req() to use list_del_init() ahead of se_tmr_req memory free. Reviewed-by: Quinn Tran <quinn.tran@qlogic.com> Cc: Himanshu Madhani <himanshu.madhani@qlogic.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Andy Grover <agrover@redhat.com> Cc: Mike Christie <mchristi@redhat.com> Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Fix LUN_RESET active I/O handling for ACK_KREFNicholas Bellinger2016-02-031-38/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a NULL pointer se_cmd->cmd_kref < 0 refcount bug during TMR LUN_RESET with active se_cmd I/O, that can be triggered during se_cmd descriptor shutdown + release via core_tmr_drain_state_list() code. To address this bug, add common __target_check_io_state() helper for ABORT_TASK + LUN_RESET w/ CMD_T_COMPLETE checking, and set CMD_T_ABORTED + obtain ->cmd_kref for both cases ahead of last target_put_sess_cmd() after TFO->aborted_task() -> transport_cmd_finish_abort() callback has completed. It also introduces SCF_ACK_KREF to determine when transport_cmd_finish_abort() needs to drop the second extra reference, ahead of calling target_put_sess_cmd() for the final kref_put(&se_cmd->cmd_kref). It also updates transport_cmd_check_stop() to avoid holding se_cmd->t_state_lock while dropping se_cmd device state via target_remove_from_state_list(), now that core_tmr_drain_state_list() is holding the se_device lock while checking se_cmd state from within TMR logic. Finally, move transport_put_cmd() release of SGL + TMR + extended CDB memory into target_free_cmd_mem() in order to avoid potential resource leaks in TMR ABORT_TASK + LUN_RESET code-paths. Also update target_release_cmd_kref() accordingly. Reviewed-by: Quinn Tran <quinn.tran@qlogic.com> Cc: Himanshu Madhani <himanshu.madhani@qlogic.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Andy Grover <agrover@redhat.com> Cc: Mike Christie <mchristi@redhat.com> Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* Merge branch 'for-next' of ↵Linus Torvalds2016-01-201-12/+21
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "The highlights this round include: - Introduce configfs support for unlocked configfs_depend_item() (krzysztof + andrezej) - Conversion of usb-gadget target driver to new function registration interface (andrzej + sebastian) - Enable qla2xxx FC target mode support for Extended Logins (himansu + giridhar) - Enable qla2xxx FC target mode support for Exchange Offload (himansu + giridhar) - Add qla2xxx FC target mode irq affinity notification + selective command queuing. (quinn + himanshu) - Fix iscsi-target deadlock in se_node_acl configfs deletion (sagi + nab) - Convert se_node_acl configfs deletion + se_node_acl->queue_depth to proper se_session->sess_kref + target_get_session() usage. (hch + sagi + nab) - Fix long-standing race between se_node_acl->acl_kref get and get_initiator_node_acl() lookup. (hch + nab) - Fix target/user block-size handling, and make sure netlink reaches all network namespaces (sheng + andy) Note there is an outstanding bug-fix series for remote I_T nexus port TMR LUN_RESET has been posted and still being tested, and will likely become post -rc1 material at this point" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (56 commits) scsi: qla2xxxx: avoid type mismatch in comparison target/user: Make sure netlink would reach all network namespaces target: Obtain se_node_acl->acl_kref during get_initiator_node_acl target: Convert ACL change queue_depth se_session reference usage iscsi-target: Fix potential dead-lock during node acl delete ib_srpt: Convert acl lookup to modern get_initiator_node_acl usage tcm_fc: Convert acl lookup to modern get_initiator_node_acl usage tcm_fc: Wait for command completion before freeing a session target: Fix a memory leak in target_dev_lba_map_store() target: Support aborting tasks with a 64-bit tag usb/gadget: Remove set-but-not-used variables target: Remove an unused variable target: Fix indentation in target_core_configfs.c target/user: Allow user to set block size before enabling device iser-target: Fix non negative ERR_PTR isert_device_get usage target/fcoe: Add tag support to tcm_fc qla2xxx: Check for online flag instead of active reset when transmitting responses qla2xxx: Set all queues to 4k qla2xxx: Disable ZIO at start time. qla2xxx: Move atioq to a different lock to reduce lock contention ...
| * target: Obtain se_node_acl->acl_kref during get_initiator_node_aclNicholas Bellinger2016-01-201-6/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch addresses a long standing race where obtaining se_node_acl->acl_kref in __transport_register_session() happens a bit too late, and leaves open the potential for core_tpg_del_initiator_node_acl() to hit a NULL pointer dereference. Instead, take ->acl_kref in core_tpg_get_initiator_node_acl() while se_portal_group->acl_node_mutex is held, and move the final target_put_nacl() from transport_deregister_session() into transport_free_session() so that fabric driver login failure handling using the modern method to still work as expected. Also, update core_tpg_get_initiator_node_acl() to take an extra reference for dynamically generated acls for demo-mode, before returning to fabric caller. Also update iscsi-target sendtargets special case handling to use target_tpg_has_node_acl() when checking if demo_mode_discovery == true during discovery lookup. Note the existing wait_for_completion(&acl->acl_free_comp) in core_tpg_del_initiator_node_acl() does not change. Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Andy Grover <agrover@redhat.com> Cc: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Convert ACL change queue_depth se_session reference usageNicholas Bellinger2016-01-201-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch converts core_tpg_set_initiator_node_queue_depth() to use struct se_node_acl->acl_sess_list when performing explicit se_tpg_tfo->shutdown_session() for active sessions, in order for new se_node_acl->queue_depth to take effect. This follows how core_tpg_del_initiator_node_acl() currently works when invoking se_tpg_tfo->shutdown-session(), and ahead of the next patch to take se_node_acl->acl_kref during lookup, the extra get_initiator_node_acl() can go away. In order to achieve this, go ahead and change target_get_session() to use kref_get_unless_zero() and propigate up the return value to know when a session is already being released. This is because se_node_acl->acl_group is already protecting se_node_acl->acl_group reference via configfs, and shutdown within core_tpg_del_initiator_node_acl() won't occur until sys_write() to core_tpg_set_initiator_node_queue_depth() attribute returns back to user-space. Also, drop the left-over iscsi-target hack, and obtain se_portal_group->session_lock in lio_tpg_shutdown_session() internally. Remove iscsi-target wrapper and unused se_tpg + force parameters and associated code. Reported-by: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Andy Grover <agrover@redhat.com> Cc: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Support aborting tasks with a 64-bit tagBart Van Assche2016-01-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | Avoid truncating the tag argument of target_submit_tmr() to a 32-bit number if the caller passes a 64-bit number. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Andy Grover <agrover@redhat.com> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Remove an unused variableBart Van Assche2016-01-071-1/+0
| | | | | | | | | | | | | | | | | | | | | | The num_node_acls member in struct se_portal_group is modified by several functions but is never read. Hence remove it. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Andy Grover <agrover@redhat.com> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * qla2xxx: Add selective command queuingQuinn Tran2016-01-071-1/+4
| | | | | | | | | | | | | | | | queue work element to specific process lessen cache miss Signed-off-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Fix spelling + remove set-but-not-used variablesBart Van Assche2016-01-061-1/+1
| | | | | | | | | | | | | | | | Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Andy Grover <agrover@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* | target: Invoke release_cmd() callback without holding a spinlockBart Van Assche2015-11-281-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the following kernel warning because it avoids that IRQs are disabled while ft_release_cmd() is invoked (fc_seq_set_resp() invokes spin_unlock_bh()): WARNING: CPU: 3 PID: 117 at kernel/softirq.c:150 __local_bh_enable_ip+0xaa/0x110() Call Trace: [<ffffffff814f71eb>] dump_stack+0x4f/0x7b [<ffffffff8105e56a>] warn_slowpath_common+0x8a/0xc0 [<ffffffff8105e65a>] warn_slowpath_null+0x1a/0x20 [<ffffffff81062b2a>] __local_bh_enable_ip+0xaa/0x110 [<ffffffff814ff229>] _raw_spin_unlock_bh+0x39/0x40 [<ffffffffa03a7f94>] fc_seq_set_resp+0xe4/0x100 [libfc] [<ffffffffa02e604a>] ft_free_cmd+0x4a/0x90 [tcm_fc] [<ffffffffa02e6972>] ft_release_cmd+0x12/0x20 [tcm_fc] [<ffffffffa042bd66>] target_release_cmd_kref+0x56/0x90 [target_core_mod] [<ffffffffa042caf0>] target_put_sess_cmd+0xc0/0x110 [target_core_mod] [<ffffffffa042cb81>] transport_release_cmd+0x41/0x70 [target_core_mod] [<ffffffffa042d975>] transport_generic_free_cmd+0x35/0x420 [target_core_mod] Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Joern Engel <joern@logfs.org> Reviewed-by: Andy Grover <agrover@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* | target: Fix race for SCF_COMPARE_AND_WRITE_POST checkingNicholas Bellinger2015-11-281-6/+8
|/ | | | | | | | | | | | | | | | | | | | | | | | | This patch addresses a race + use after free where the first stage of COMPARE_AND_WRITE in compare_and_write_callback() is rescheduled after the backend sends the secondary WRITE, resulting in second stage compare_and_write_post() callback completing in target_complete_ok_work() before the first can return. Because current code depends on checking se_cmd->se_cmd_flags after return from se_cmd->transport_complete_callback(), this results in first stage having SCF_COMPARE_AND_WRITE_POST set, which incorrectly falls through into second stage CAW processing code, eventually triggering a NULL pointer dereference due to use after free. To address this bug, pass in a new *post_ret parameter into se_cmd->transport_complete_callback(), and depend upon this value instead of ->se_cmd_flags to determine when to return or fall through into ->queue_status() code for CAW. Cc: Sagi Grimberg <sagig@mellanox.com> Cc: <stable@vger.kernel.org> # v3.12+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Remove no-op conditionalAndy Grover2015-09-111-2/+1
| | | | | | | | | This does nothing, and there are many other places where transport_cmd_check_stop_to_fabric()'s retval is not checked>, If we wanted to check it here, we should probably do it those other places too. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target/qla2xxx: Honor max_data_sg_nents I/O transfer limitNicholas Bellinger2015-09-111-1/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds an optional fabric driver provided SGL limit that target-core will honor as it's own internal I/O maximum transfer length limit, as exposed by EVPD=0xb0 block limits parameters. This is required for handling cases when host I/O transfer length exceeds the requested EVPD block limits maximum transfer length. The initial user of this logic is qla2xxx, so that we can avoid having to reject I/Os from some legacy FC hosts where EVPD=0xb0 parameters are not honored. When se_cmd payload length exceeds the provided limit in target_check_max_data_sg_nents() code, se_cmd->data_length + se_cmd->prot_length are reset with se_cmd->residual_count plus underflow bit for outgoing TFO response callbacks. It also checks for existing CDB level underflow + overflow and recalculates final residual_count as necessary. Note this patch currently assumes 1:1 mapping of PAGE_SIZE per struct scatterlist entry. Reported-by: Craig Watson <craig.watson@vanguard-rugged.com> Cc: Craig Watson <craig.watson@vanguard-rugged.com> Tested-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Arun Easi <arun.easi@qlogic.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Cc: Andrew Vasquez <andrew.vasquez@qlogic.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Remove cmd->se_ordered_id (unused except debug log lines)Roland Dreier2015-07-311-26/+13
| | | | | | | | | | | For every command, we set se_ordered_id by doing atomic_inc_return on dev->dev_ordered_id for the corresponding device. However, the only places this value gets used are in pr_debug() calls, which doesn't seem worth an extra atomic op per IO. Signed-off-by: Roland Dreier <roland@purestorage.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: improve unsupported opcode messageJoern Engel2015-07-301-0/+5
| | | | | | | | | | | | | | Make the warning about unsupported SCSI opcode more useful: - Add in the initiator name so we know who's sending it. - Print the warning even for opcodes that spc_parse_cdb() knows about but that we don't handle. Signed-off-by: Joern Engel <joern@purestorage.com> Signed-off-by: Spencer Baugh <sbaugh@catern.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: allow underflow/overflow for PR OUT etc. commandsRoland Dreier2015-07-301-3/+3
| | | | | | | | | | | | It's not necessarily a fatal error if a command with a data-out phase has a data length that differs from the transport data length (e.g. PERSISTENT RESERVE OUT might have a parameter list length in the CDB that's smaller than the FC_DL field), so allow these commands. The Windows compliance test sends them. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Spencer Baugh <sbaugh@catern.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Return descriptor format sense data in case the LU spans 64bit sectorsSagi Grimberg2015-07-231-1/+2
| | | | | | | | | | | | | | | In case a LU spans 64bit sectors, fixed size sense data information field is only 32 bits which means the sector information will be truncated. Thus, if the LU spans 64bit sectors, use descriptor format sense data to correctly report sector information. Reported-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* scsi: Protect against buffer possible overflow in scsi_set_sense_informationSagi Grimberg2015-07-231-3/+11
| | | | | | | | | | | | | | | | Make sure that the input sense buffer has sufficient length to fit the information descriptor (12 additional bytes). Modify scsi_set_sense_information to receive the sense buffer length and adjust its callers scsi target and libata. (Fix patch fuzz in scsi_set_sense_information - nab) Reported-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Cc: Tejun Heo <tj@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Return ABORTED_COMMAND sense key for PI errorsSagi Grimberg2015-07-231-3/+3
| | | | | | | | | | | | PI errors were reported with ILLEGAL_REQUEST sense key but there was actually no problem with the request. Target detected PI errors should be reported with aborted command sense key. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Use scsi helpers to build the sense data correctlySagi Grimberg2015-07-231-17/+4
| | | | | | | | | | | | Instead of open coding the sense buffer construction, use scsi scsi_build_sense_buffer() and scsi_set_sense_information() helpers which moved to scsi_common. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Split transport_send_check_condition_and_sense()Bart Van Assche2015-07-231-235/+148
| | | | | | | | | | | | | | Move the code for translating a sense_reason_t code into a SCSI status ASC and ASCQ codes from transport_send_check_condition_and_sense() into the new function translate_sense_reason(). Convert the switch statement that performs the translation into table-driven code. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* target: Inline transport_get_sense_codes()Bart Van Assche2015-07-231-14/+2
| | | | | | | | | | | | Inline this function in its call site since it performs a trivial task and since it is only called once. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* Merge branch 'for-next' of ↵Linus Torvalds2015-07-041-141/+108
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "It's been a busy development cycle for target-core in a number of different areas. The fabric API usage for se_node_acl allocation is now within target-core code, dropping the external API callers for all fabric drivers tree-wide. There is a new conversion to RCU hlists for se_node_acl and se_portal_group LUN mappings, that turns fast-past LUN lookup into a completely lockless code-path. It also removes the original hard-coded limitation of 256 LUNs per fabric endpoint. The configfs attributes for backends can now be shared between core and driver code, allowing existing drivers to use common code while still allowing flexibility for new backend provided attributes. The highlights include: - Merge sbc_verify_dif_* into common code (sagi) - Remove iscsi-target support for obsolete IFMarker/OFMarker (Christophe Vu-Brugier) - Add bidi support in target/user backend (ilias + vangelis + agover) - Move se_node_acl allocation into target-core code (hch) - Add crc_t10dif_update common helper (akinobu + mkp) - Handle target-core odd SGL mapping for data transfer memory (akinobu) - Move transport ID handling into target-core (hch) - Move task tag into struct se_cmd + support 64-bit tags (bart) - Convert se_node_acl->device_list[] to RCU hlist (nab + hch + paulmck) - Convert se_portal_group->tpg_lun_list[] to RCU hlist (nab + hch + paulmck) - Simplify target backend driver registration (hch) - Consolidate + simplify target backend attribute implementations (hch + nab) - Subsume se_port + t10_alua_tg_pt_gp_member into se_lun (hch) - Drop lun_sep_lock for se_lun->lun_se_dev RCU usage (hch + nab) - Drop unnecessary core_tpg_register TFO parameter (nab) - Use 64-bit LUNs tree-wide (hannes) - Drop left-over TARGET_MAX_LUNS_PER_TRANSPORT limit (hannes)" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (76 commits) target: Bump core version to v5.0 target: remove target_core_configfs.h target: remove unused TARGET_CORE_CONFIG_ROOT define target: consolidate version defines target: implement WRITE_SAME with UNMAP bit using ->execute_unmap target: simplify UNMAP handling target: replace se_cmd->execute_rw with a protocol_data field target/user: Fix inconsistent kmap_atomic/kunmap_atomic target: Send UA when changing LUN inventory target: Send UA upon LUN RESET tmr completion target: Send UA on ALUA target port group change target: Convert se_lun->lun_deve_lock to normal spinlock target: use 'se_dev_entry' when allocating UAs target: Remove 'ua_nacl' pointer from se_ua structure target_core_alua: Correct UA handling when switching states xen-scsiback: Fix compile warning for 64-bit LUN target: Remove TARGET_MAX_LUNS_PER_TRANSPORT target: use 64-bit LUNs target: Drop duplicate + unused se_dev_check_wce target: Drop unnecessary core_tpg_register TFO parameter ...
| * target: Send UA upon LUN RESET tmr completionHannes Reinecke2015-06-231-0/+5
| | | | | | | | | | | | | | | | | | | | SAM mandates that an BUS DEVICE RESET FUNCTION OCCURRED UA needs to be send after a LUN RESET tmr has completed. (Update to use target_ua_allocate_lun - hch) Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: use 'se_dev_entry' when allocating UAsHannes Reinecke2015-06-161-6/+6
| | | | | | | | | | | | | | | | | | | | | | We need to use 'se_dev_entry' as argument when allocating UAs, otherwise we'll never see any UAs for an implicit ALUA state transition triggered from userspace. (Add target_ua_allocate_lun() common caller - nab) Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: use 64-bit LUNsHannes Reinecke2015-06-151-3/+3
| | | | | | | | | | | | | | | | As we're now using a list to hold the LUNs the target core can now converted to use 64-bit LUNs internally. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Drop lun_sep_lock for se_lun->lun_se_dev RCU usageNicholas Bellinger2015-06-011-13/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With se_port and t10_alua_tg_pt_gp_member being absored into se_lun, there is no need for an extra lock to protect se_lun->lun_se_dev assignment. This patch also converts backend drivers to use call_rcu() release to allow any se_device readers to complete. The call_rcu() instead of kfree_rcu() is required here because se_device is embedded into the backend driver specific structure. Also, convert se_lun->lun_stats to use atomic_long_t within the target_complete_ok_work() completion callback, and add FIXME for transport_lookup_tmr_lun() with se_lun->lun_ref. Finally, update sbp_update_unit_directory() special case usage with proper rcu_dereference_raw() and configfs symlink comment. Reported-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Chris Boot <bootc@bootc.net> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Subsume se_port + t10_alua_tg_pt_gp_member into se_lunChristoph Hellwig2015-06-011-29/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch eliminates all se_port + t10_alua_tg_pt_gp_member usage, and converts current users to direct se_lun pointer dereference. This includes the removal of core_export_port(), core_release_port() core_dev_export() and core_dev_unexport(). Along with conversion of special case se_lun pointer dereference within PR ALL_TG_PT=1 and ALUA access state transition UNIT_ATTENTION handling. Also, update core_enable_device_list_for_node() to reference the new per se_lun->lun_deve_list when creating a new entry, or replacing an existing one via RCU. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Simplify LUN shutdown codeBart Van Assche2015-06-011-22/+1
| | | | | | | | | | | | | | | | | | | | | | Instead of starting a thread from transport_clear_lun_ref() that waits for LUN shutdown, wait in that function for LUN shutdown to finish. Additionally, change the return type of transport_clear_lun_ref() from int to void. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Convert se_tpg->acl_node_lock to ->acl_node_mutexNicholas Bellinger2015-06-011-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch converts se_tpg->acl_node_lock to struct mutex, so that ->acl_node_acl walkers in core_clear_lun_from_tpg() can block when calling core_disable_device_list_for_node(). It also updates core_dev_add_lun() to hold ->acl_node_mutex when calling core_tpg_add_node_to_devs() to build ->lun_entry_hlist for dynamically generated se_node_acl. Reviewed-by: Hannes Reinecke <hare@suse.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: remove ->put_session methodChristoph Hellwig2015-05-301-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The only instance of ->put_session is in qla2xxx, and was added by commit aaf68b ("tcm_qla2xxx: Convert to TFO->put_session() usage") with the following description: This patch converts tcm_qla2xxx code to use an internal kref_put() for se_session->sess_kref in order to ensure that qla_hw_data->hardware_lock can be held while calling qlt_unreg_sess() for the final put. But these day we're already holding the hardware lock over qlt_unreg_sess in the ->close_session callback, so we're fine without this method. (Re-add missing tcm_qla2xxx_release_session + drop put_session usage - nab) Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: target_core_configfs.h is not needed in fabric driversChristoph Hellwig2015-05-301-1/+0
| | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Move task tag into struct se_cmd + support 64-bit tagsBart Van Assche2015-05-301-21/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Simplify target core and target drivers by storing the task tag a.k.a. command identifier inside struct se_cmd. For several transports (e.g. SRP) tags are 64 bits wide. Hence add support for 64-bit tags. (Fix core_tmr_abort_task conversion spec warnings - nab) (Fix up usb-gadget to use 16-bit tags - HCH + bart) Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Andy Grover <agrover@redhat.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: <qla2xxx-upstream@qlogic.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Juergen Gross <jgross@suse.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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