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2013-09-13Merge branch 'for-next' of ↵Linus Torvalds47-473/+2347
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "Lots of activity again this round for I/O performance optimizations (per-cpu IDA pre-allocation for vhost + iscsi/target), and the addition of new fabric independent features to target-core (COMPARE_AND_WRITE + EXTENDED_COPY). The main highlights include: - Support for iscsi-target login multiplexing across individual network portals - Generic Per-cpu IDA logic (kent + akpm + clameter) - Conversion of vhost to use per-cpu IDA pre-allocation for descriptors, SGLs and userspace page pointer list - Conversion of iscsi-target + iser-target to use per-cpu IDA pre-allocation for descriptors - Add support for generic COMPARE_AND_WRITE (AtomicTestandSet) emulation for virtual backend drivers - Add support for generic EXTENDED_COPY (CopyOffload) emulation for virtual backend drivers. - Add support for fast memory registration mode to iser-target (Vu) The patches to add COMPARE_AND_WRITE and EXTENDED_COPY support are of particular significance, which make us the first and only open source target to support the full set of VAAI primitives. Currently Linux clients are lacking upstream support to actually utilize these primitives. However, with server side support now in place for folks like MKP + ZAB working on the client, this logic once reserved for the highest end of storage arrays, can now be run in VMs on their laptops" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (50 commits) target/iscsi: Bump versions to v4.1.0 target: Update copyright ownership/year information to 2013 iscsi-target: Bump default TCP listen backlog to 256 target: Fix >= v3.9+ regression in PR APTPL + ALUA metadata write-out iscsi-target; Bump default CmdSN Depth to 64 iscsi-target: Remove unnecessary wait_for_completion in iscsi_get_thread_set iscsi-target: Add thread_set->ts_activate_sem + use common deallocate iscsi-target: Fix race with thread_pre_handler flush_signals + ISCSI_THREAD_SET_DIE target: remove unused including <linux/version.h> iser-target: introduce fast memory registration mode (FRWR) iser-target: generalize rdma memory registration and cleanup iser-target: move rdma wr processing to a shared function target: Enable global EXTENDED_COPY setup/release target: Add Third Party Copy (3PC) bit in INQUIRY response target: Enable EXTENDED_COPY setup in spc_parse_cdb target: Add support for EXTENDED_COPY copy offload emulation target: Avoid non-existent tg_pt_gp_mem in target_alua_state_check target: Add global device list for EXTENDED_COPY target: Make helpers non static for EXTENDED_COPY command setup target: Make spc_parse_naa_6h_vendor_specific non static ...
2013-09-11target/iscsi: Bump versions to v4.1.0Nicholas Bellinger1-1/+1
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-11target: Update copyright ownership/year information to 2013Nicholas Bellinger37-75/+39
Update copyright ownership/year information for target-core, loopback, iscsi-target, tcm_qla2xx, vhost and iser-target. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-11iscsi-target: Bump default TCP listen backlog to 256Nicholas Bellinger2-1/+2
This patch bumps the default TCP listen backlog within iscsit_setup_np() from 5 to 256, in order to reduce the overall latency caused by a small backlog with 100's of simultaneous login attempts directed to the same single network portal. Also add a ISCSIT_TCP_BACKLOG macro in iscsi_target_core.h. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-11target: Fix >= v3.9+ regression in PR APTPL + ALUA metadata write-outGera Kazakov2-2/+2
This patch fixes a >= v3.9+ regression in __core_scsi3_write_aptpl_to_file() + core_alua_write_tpg_metadata() write-out, where a return value of -EIO was incorrectly being returned upon success. This bug was originally introduced in: commit 0e9b10a90f1c30f25dd6f130130240745ab14010 Author: Al Viro <viro@zeniv.linux.org.uk> Date: Sat Feb 23 15:22:43 2013 -0500 target: writev() on single-element vector is pointless However, given that the return of core_scsi3_update_and_write_aptpl() was not used to determine if a command should be returned with non GOOD status, this bug was not being triggered in PR logic until v3.11-rc1 by commit: commit 459f213ba162bd13e113d6f92a8fa6c780fd67ed Author: Andy Grover <agrover@redhat.com> Date: Thu May 16 10:41:02 2013 -0700 target: Allocate aptpl_buf inside update_and_write_aptpl() So, go ahead and only return -EIO if kernel_write() returned a negative value. Reported-by: Gera Kazakov <gkazakov@msn.com> Signed-off-by: Gera Kazakov <gkazakov@msn.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andy Grover <agrover@redhat.com> Cc: stable@vger.kernel.org # 3.9+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-11iscsi-target; Bump default CmdSN Depth to 64Nicholas Bellinger1-1/+1
This patch bumps the default TA_DEFAULT_CMDSN_DEPTH from 16 -> 64, which is closer to a sane default for larger pipes @ 10 Gb/sec with traditional iSCSI, or @ 40/56 Gb/sec Ethernet/Infiniband with iSCSI Extentions for RDMA. There is really no downside to increasing this default value for 1 Gb/sec. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-11iscsi-target: Remove unnecessary wait_for_completion in iscsi_get_thread_setNicholas Bellinger1-16/+3
This patch removes an unnecessary wait_for_completion within iscsi_get_thread_set(), that would wait for 1 second before trying to obtain an inactive struct iscsi_thread_set from iscsi_get_ts_from_inactive_list(). Since iscsi_allocate_thread_sets() will already be adding the newly allocated iscsi_thread_set to the inactive list directly, there is no need to wait here. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-11iscsi-target: Add thread_set->ts_activate_sem + use common deallocateNicholas Bellinger2-85/+59
This patch removes the iscsi_thread_set->[rx,tx]_post_start_comp that was originally used synchronize startup between rx and tx threads within a single thread_set. Instead, use a single ->ts_activate_sem in iscsi_activate_thread_set() to wait for both processes to awake in the RX/TX pre handlers. Also, go ahead and refactor thread_set deallocate code into a common iscsi_deallocate_thread_one(), and update iscsi_deallocate_thread_sets() and iscsi_deallocate_extra_thread_sets() use this code v3 changes: - Make iscsi_deallocate_thread_one defined as static (Fengguang) v2 changes: - Set ISCSI_THREAD_SET_ACTIVE before calling complete in iscsi_activate_thread_set - Protect ts->conn sanity checks with ->ts_state_lock in RX/TX pre handlers - Add ->ts_activate_sem to save extra context switches per iscsi_activate_thread_set() call. - Refactor thread_set shutdown into iscsi_deallocate_thread_one() Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-11iscsi-target: Fix race with thread_pre_handler flush_signals + ↵Nicholas Bellinger1-6/+13
ISCSI_THREAD_SET_DIE This patch addresses an long standing race in iscsi_[rx,tx]_thread_pre_handler() use of flush_signals(), and between iscsi_deallocate_extra_thread_sets() setting ISCSI_THREAD_SET_DIE before calling kthread_stop(). It addresses the issue by both holding ts_state_lock before calling send_sig() in iscsi_deallocate_extra_thread_sets(), as well as only calling flush_signals() when ts->status != ISCSI_THREAD_SET_DIE within iscsi_[rx,tx]_thread_pre_handler() code. v2 changes: - Add explicit complete(&ts->[rx,tx]_start_comp); before kthread_stop() in iscsi_deallocate_extra_thread_sets() - Drop left-over send_sig() calls in iscsi_deallocate_extra_thread_sets() - Add kthread_should_stop() check in iscsi_signal_thread_pre_handler() Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-11target: remove unused including <linux/version.h>Wei Yongjun1-1/+0
Remove including <linux/version.h> that don't need it. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-11target: Enable global EXTENDED_COPY setup/releaseNicholas Bellinger1-0/+6
Add calls to target_xcopy_setup_pt() + target_xcopy_release_pt() to target_core_init_configfs() and target_core_exit_configfs() respectively. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Zach Brown <zab@redhat.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-11target: Add Third Party Copy (3PC) bit in INQUIRY responseNicholas Bellinger4-0/+25
This patch adds the Third Party Copy (3PC) bit to signal support for EXTENDED_COPY within standard inquiry response data. Also add emulate_3pc device attribute in configfs (enabled by default) to allow the exposure of this bit to be disabled, if necessary. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Zach Brown <zab@redhat.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-11target: Enable EXTENDED_COPY setup in spc_parse_cdbNicholas Bellinger1-2/+8
Setup up the se_cmd->execute_cmd() pointers for EXTENDED_COPY and RECEIVE_COPY_RESULTS handling within spc_parse_cdb() Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Zach Brown <zab@redhat.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-11target: Add support for EXTENDED_COPY copy offload emulationNicholas Bellinger3-1/+1146
This patch adds support for EXTENDED_COPY emulation from SPC-3, that enables full copy offload target support within both a single virtual backend device, and across multiple virtual backend devices. It also functions independent of target fabric, and supports copy offload across multiple target fabric ports. This implemenation supports both EXTENDED_COPY PUSH and PULL models of operation, so the actual CDB may be received on either source or desination logical unit. For Target Descriptors, it currently supports the NAA IEEE Registered Extended designator (type 0xe4), which allows the reference of target ports to occur independent of fabric type using EVPD 0x83 WWNs. For Segment Descriptors, it currently supports copy from block to block (0x02) mode. It also honors any present SCSI reservations of the destination target port. Note that only Supports No List Identifier (SNLID=1) mode is supported. Also included is basic RECEIVE_COPY_RESULTS with service action type OPERATING PARAMETERS (0x03) required for SNLID=1 operation. v3 changes: - Fix incorrect return type in target_do_receive_copy_results() (Fengguang) v2 changes: - Use target_alloc_sgl() instead of transport_generic_get_mem() - Convert debug output to use pr_debug() - Convert target_xcopy_parse_target_descriptors() NAA IEEN WWN dump to use 0x%16phN format specification - Drop unnecessary xcopy_pt_cmd->xpt_passthrough_wsem, and associated usage in xcopy_pt_write_pending() and target_xcopy_issue_pt_cmd() - Add check for unsupported EXTENDED_COPY(LID4) service action bits in target_do_xcopy() Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Zach Brown <zab@redhat.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-11target: Avoid non-existent tg_pt_gp_mem in target_alua_state_checkNicholas Bellinger1-0/+3
This patch adds an check for a non-existent port->sep_alua_tg_pt_gp_mem within target_alua_state_check(), which is not present for internally dispatched EXTENDED_COPY WRITE I/O to the destination target port. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Zach Brown <zab@redhat.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-11target: Add global device list for EXTENDED_COPYNicholas Bellinger1-0/+13
EXTENDED_COPY needs to be able to search a global list of devices based on NAA WWN device identifiers, so add a simple g_device_list protected by g_device_mutex. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Zach Brown <zab@redhat.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-11target: Make helpers non static for EXTENDED_COPY command setupNicholas Bellinger1-2/+2
Both target_alloc_sgl() and transport_generic_map_mem_to_cmd() are required by EXTENDED_COPY logic when setting up internally dispatched command descriptors, so go ahead and make both of these non static. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Zach Brown <zab@redhat.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-11target: Make spc_parse_naa_6h_vendor_specific non staticNicholas Bellinger1-2/+2
This patch makes spc_parse_naa_6h_vendor_specific() available to other target code, which is required by EXTENDED_COPY when comparing the received NAA WWN device identifer for locating the associated se_device backend. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Zach Brown <zab@redhat.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-11target: Make target_core_subsystem defined as non staticNicholas Bellinger1-1/+1
This patch makes the top-level target_core_subsystem array available to other target code, which is required by EXTENDED_COPY to pin the backend se_device using configfs_depend_item(), in order to ensure it can't be removed for the duration of a EXTENDED_COPY operation. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Zach Brown <zab@redhat.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-11target: Release COMPARE_AND_WRITE mutex in generic failure pathNicholas Bellinger2-0/+14
This patch adds a extra check for SCF_COMPARE_AND_WRITE within transport_generic_request_failure() to invoke the callback for compare_and_write_callback() or compare_and_write_done(), in order to release se_dev->caw_mutex from the generic failure path. It also adds to checks within compare_and_write_callback() to avoid processing when transport_generic_request_failure() occurs early enough that cmd->t_data_sg or cmd->t_bidi_data_sg have not been setup yet, nor se_dev->caw_mutex obtained from within sbc_compare_and_write(). v4 changes: - Add explicit check for cmd->transport_complete_callback in transport_generic_request_failure() to handle case where sbc_compare_and_write()clears callback pointer (Dan Carpenter) Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-11target: Add compare_and_write_post() completion callback fall throughNicholas Bellinger2-10/+12
This patch changes target_complete_ok_work() to fall through after calling the se_cmd->transport_complete_callback() -> compare_and_write_post() callback, by keying off the existance of SCF_COMPARE_AND_WRITE_POST. This is necessary because once SCF_COMPARE_AND_WRITE_POST has been set by compare_and_write_post(), the SCSI response needs to be sent via TFO->queue_status(). Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-11target: Add support for COMPARE_AND_WRITE emulationNicholas Bellinger2-1/+197
This patch adds support for COMPARE_AND_WRITE emulation on a per block basis. This logic is used as an atomic test and set primative currently used by VMWare ESX VAAI for performing array side locking of individual VMFS extent ownership. This includes the COMPARE_AND_WRITE CDB parsing within sbc_parse_cdb(), and does the majority of the work within the compare_and_write_callback() to perform the verify instance user data comparision, and subsequent write instance user data I/O submission upon a successfull comparision. The synchronization is enforced by se_device->caw_sem, that is obtained before the initial READ I/O submission in sbc_compare_and_write(). The mutex is then released upon MISCOMPARE in compare_and_write_callback(), or upon WRITE instance user-data completion in compare_and_write_post(). The implementation currently assumes a single logical block (NoLB=1). v4 changes: - Explicitly clear cmd->transport_complete_callback for two failure cases in sbc_compare_and_write() in order to avoid double unlock of ->caw_sem in compare_and_write_callback() (Dan Carpenter) v3 changes: - Convert se_device->caw_mutex to ->caw_sem v2 changes: - Set SCF_COMPARE_AND_WRITE and cmd->execute_cmd() to sbc_compare_and_write() during setup in sbc_parse_cdb() - Use sbc_compare_and_write() for initial READ submission with DMA_FROM_DEVICE - Reset cmd->execute_cmd() to sbc_execute_rw() for write instance user-data in compare_and_write_callback() - Drop SCF_BIDI command flag usage - Set TRANSPORT_PROCESSING + transport_state flags before write instance submission, and convert to __target_execute_cmd() - Prevent sbc_get_size() from being being called twice to generate incorrect size in sbc_parse_cdb() - Enforce se_device->caw_mutex synchronization between initial READ I/O submission, and final WRITE I/O completion. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target: Add MAXIMUM COMPARE AND WRITE LENGTH in Block Limits VPDNicholas Bellinger4-0/+24
This patch adds the MAXIMUM COMPARE AND WRITE LENGTH bit, currently hardcoded to a single logical block (NoLB=1) within the Block Limits VPD in spc_emulate_evpd_b0(). Also add emulate_caw device attribute in configfs (enabled by default) to allow the exposure of this bit to be disabled, if necessary. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target: Make __target_execute_cmd() available as externNicholas Bellinger1-1/+1
Required by COMPARE_AND_WRITE for write instance user-data submission, in order to bypass target_execute_cmd() checks. Reported-by: Christoph Hellwig <hch@lst.de> Cc: Roland Dreier <roland@purestorage.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target: Add transport_reset_sgl_orig() for COMPARE_AND_WRITENicholas Bellinger1-1/+20
After COMPARE_AND_WRITE completes it's comparision, the WRITE payload SGLs head expect to be updated to point from the verify instance of user data, to the write instance of user data. So for this special case, add transport_reset_sgl_orig() usage within transport_free_pages() and add se_cmd->t_data_[sg,nents]_orig members to save the original assignments. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target: Do memory allocation for bidi commands using target_alloc_sglNicholas Bellinger1-0/+17
This patch updates transport_generic_new_cmd() to call target_alloc_sgl() for SGL + page memory allocation for se_cmd->t_bidi_data_sg. It also adds the special case for SCF_COMPARE_AND_WRITE to calculate a different bidi_length based upon se_cmd->t_task_nolb. Reported-by: Christoph Hellwig <hch@lst.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target: Refactor transport_generic_get_mem to target_alloc_sglNicholas Bellinger1-17/+18
This patch refactors transport_generic_get_mem() to target_alloc_sgl() for accepting **sgl, *nents, length and zero_page as function parameters in order to be used for both se_cmd->t_data_sg + se_cmd->t_bidi_data_sg allocations. Reported-by: Christoph Hellwig <hch@lst.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target: Convert se_cmd->t_bidi_data_sg checks to use SCF_BIDINicholas Bellinger1-2/+2
Stop keying off se_cmd->t_bidi_data_sg within transport_complete_qf() + target_complete_ok_work(), and just use SCF_BIDI instead. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target: Allow sbc_ops->execute_rw() to accept SGLs + data_directionNicholas Bellinger4-22/+33
COMPARE_AND_WRITE expects to be able to send down a DMA_FROM_DEVICE to obtain the necessary READ payload for comparision against the first half of the WRITE payload containing the verify user data. Currently virtual backends expect to internally reference SGLs, SGL nents, and data_direction, so change IBLOCK, FILEIO and RD sbc_ops->execute_rw() to accept this values as function parameters. Also add default sbc_execute_rw() handler for the typical case for cmd->execute_rw() submission using cmd->t_data_sg, cmd->t_data_nents, and cmd->data_direction). v2 Changes: - Add SCF_COMPARE_AND_WRITE command flag - Use sbc_execute_rw() for normal cmd->execute_rw() submission with expected se_cmd members. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target: Add TCM_MISCOMPARE_VERIFY sense handlingNicholas Bellinger1-0/+9
This patch adds TCM_MISCOMPARE_VERIFY (ASC=0x1d, ASCQ=0x00) sense handling to transport_send_check_condition_and_sense(), which is required for a COMPARE_AND_WRITE comparision failure. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target: Add return for se_cmd->transport_complete_callbackNicholas Bellinger2-8/+25
This patch adds a sense_reason_t return to ->transport_complete_callback(), and updates target_complete_ok_work() to invoke the call if necessary to transport_send_check_condition_and_sense() during the failure case. Also update xdreadwrite_callback() to use this return value. Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target/pscsi: remove an unneeded checkDan Carpenter1-3/+2
blk_get_request() just returns NULL on error, it doesn't return an ERR_PTR. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-10iscsi-target: Convert to per-cpu ida_alloc + ida_free command mapNicholas Bellinger3-11/+46
This patch changes iscsi-target to use transport_alloc_session_tags() pre-allocation logic for per-cpu session tag pooling with internal ida_alloc() + ida_free() calls based upon the saved se_cmd->map_tag id. This includes tag pool setup based upon per NodeACL queue_depth after locating se_node_acl in iscsi_target_locate_portal(). Also update iscsit_allocate_cmd() and iscsit_release_cmd() to use percpu_ida_alloc() and percpu_ida_free() respectively. v5 changes; - Convert to percpu_ida.h include v2 changes: - Fix bug with SessionType=Discovery in iscsi_target_locate_portal() Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Kent Overstreet <kmo@daterainc.com> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10iscsi/iser-target: Convert to command priv_size usageNicholas Bellinger5-33/+7
This command converts iscsi/isert-target to use allocations based on iscsit_transport->priv_size within iscsit_allocate_cmd(), instead of using an embedded isert_cmd->iscsi_cmd. This includes removing iscsit_transport->alloc_cmd() usage, along with updating isert-target code to use iscsit_priv_cmd(). Also, remove left-over iscsit_transport->release_cmd() usage for direct calls to iscsit_release_cmd(), and drop the now unused lio_cmd_cache and isert_cmd_cache. Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Kent Overstreet <kmo@daterainc.com> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
2013-09-10target: Add transport_init_session_tags using per-cpu idaNicholas Bellinger1-0/+48
This patch adds lib/idr.c based transport_init_session_tags() logic that allows fabric drivers to setup a per-cpu se_sess->sess_tag_pool and associated se_sess->sess_cmd_map for basic tagged pre-allocation of fabric descriptor sized memory. v5 changes: - Convert to percpu_ida.h include v4 changes: - Add transport_alloc_session_tags() for fabrics that need early transport_init_session() v3 changes: - Update to percpu-ida usage Cc: Kent Overstreet <kmo@daterainc.com> Cc: Asias He <asias@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Asias He <asias@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-10iscsi-target: Remove left-over iscsi_target_do_login_ioNicholas Bellinger1-9/+1
There is no need for iscsi_target_do_login_io() anymore in modern code, so go ahead and call iscsi_target_do_tx_login_io() directly within iscsi_target_do_login(). Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-10iscsi-target: Add sk->sk_state_change to cleanup after TCP failureNicholas Bellinger2-0/+103
This patch adds a sock->sk_state_change() -> iscsi_target_sk_state_change() callback in order to handle transient TCP failures during the login process, where sock->sk_data_ready() -> iscsi_target_sk_data_ready() may not be called to release connection resources, and relinquish tpg->np_login_lock via iscsit_deaccess_np() It performs the sk->sk_state check using iscsi_target_sk_state_check() to look for TCP_CLOSE_WAIT + TCP_CLOSE, and invokes schedule_delayed_work() -> iscsi_target_do_cleanup() to perform the remaining cleanup from process context. It adds an explicit sk_state_check to iscsi_target_do_login() in order to determine a state failure when iscsi_target_sk_state_change() may not be able to proceed before LOGIN_FLAGS_READY=1 is set. Also use sk->sk_sndtimeo -> sk->sk_rcvtimeo settings during login to iscsi_target_set_sock_callbacks(), and revert back post login to use MAX_SCHEDULE_TIMEOUT in iscsi_target_restore_sock_callbacks(). Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-10iscsi-target: Add login negotiation multi-plexing supportNicholas Bellinger4-10/+234
This patch adds support for login negotiation multi-plexing in iscsi-target code. This involves handling the first login request PDU + payload and login response PDU + payload within __iscsi_target_login_thread() process context, and then changing struct sock->sk_data_ready() so that all subsequent exchanges are handled by workqueue process context, to allow other incoming login requests to be received in parallel by __iscsi_target_login_thread(). Upon login negotiation completion (or failure), ->sk_data_ready() is replaced with the original kernel sockets handler saved in iscsi_conn->orig_data_ready. v3 changes: - Convert iscsi_target_sk_data_ready() lock access to write[lock,unlock]_bh() - Only clear LOGIN_FLAGS_READ_ACTIVE when iscsi_target_do_login() returns zero - Add LOGIN_FLAGS_READY + LOGIN_FLAGS_CLOSED bit checks to iscsi_target_sk_data_ready() - Make INIT_DELAYED_WORK() + iscsi_target_set_sock_callbacks() setup happen earlier by moving from iscsi_target_start_negotiation() into iscsi_target_locate_portal() - Set LOGIN_FLAGS_READY bit in iscsi_target_start_negotiation() after iscsi_target_do_login() returns zero. v2 changes: - Add login_timer in iscsi_target_do_login_rx() to avoid possible endless sleep with MSG_WAITALL for traditional iscsi-target in certain network configurations. - Convert lprintk() -> pr_debug() - Remove forward declarations of iscsi_target_set_sock_callbacks(), iscsi_target_restore_sock_callbacks() and iscsi_target_sk_data_ready() - Make iscsi_target_set_sock_callbacks + iscsi_target_restore_sock_callbacks() static (Fengguang) - Make iscsi_target_do_login_rx() safe for iser-target w/o conn->sock Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-10iscsi-target: Prepare login code for multi-plexing supportNicholas Bellinger7-107/+154
This patch prepares the iscsi-target login code for multi-plexing support. This includes: - Adding iscsi_tpg_np->tpg_np_kref + iscsit_login_kref_put() for handling callback of iscsi_tpg_np->tpg_np_comp - Adding kref_put() in iscsit_deaccess_np() - Adding kref_put() and wait_for_completion() in iscsit_reset_np_thread() - Refactor login failure path release logic into iscsi_target_login_sess_out() - Update __iscsi_target_login_thread() to handle iscsi_post_login_handler() asynchronous completion - Add shutdown parameter for iscsit_clear_tpg_np_login_thread*() v3 changes: - Convert iscsi_portal_group->np_login_lock to ->np_login_sem - Add LOGIN_FLAGS definitions v2 changes: - Remove duplicate call to iscsi_post_login_handler() in __iscsi_target_login_thread() - Drop unused iscsi_np->np_login_tpg Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-09-01target: Fix se_cmd->state_list leak regression during WRITE failureNicholas Bellinger1-0/+11
This patch addresses a v3.11 specific regression where se_cmd->state_list was being leaked during a fabric WRITE failure, when the fabric releases an associated se_cmd descriptor before I/O submission occurs, and normal fast path callbacks have a chance to call target_remove_from_state_list(). It was manifesting with Poison overwritten messages with iscsi-target once an ImmediateData payload CRC32C failure occured. This bug was originally introduced during v3.11-rc1 with the following commit: commit 0b66818ac6de67a6125ae203272fb76e79b3a20f Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Thu Jun 6 01:36:41 2013 -0700 target: Drop unnecessary CMD_T_DEV_ACTIVE check from transport_lun_remove_cmd Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-08-24iscsi-target: Fix potential NULL pointer in solicited NOPOUT rejectNicholas Bellinger1-0/+8
This patch addresses a potential NULL pointer dereference regression in iscsit_setup_nop_out() code, specifically for two cases when a solicited NOPOUT triggers a ISCSI_REASON_PROTOCOL_ERROR reject to be generated. This is because iscsi_cmd is expected to be NULL for solicited NOPOUT case before iscsit_process_nop_out() locates the descriptor via TTT using iscsit_find_cmd_from_ttt(). This regression was originally introduced in: commit ba159914086f06532079fc15141f46ffe7e04a41 Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Wed Jul 3 03:48:24 2013 -0700 iscsi-target: Fix iscsit_add_reject* usage for iser Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-08-24iscsi-target: Fix iscsit_transport reference leak during NP thread resetNicholas Bellinger1-5/+4
This patch fixes a bug in __iscsi_target_login_thread() where an explicit network portal thread reset ends up leaking the iscsit_transport module reference, along with the associated iscsi_conn allocation. This manifests itself with iser-target where a NP reset causes the extra iscsit_transport reference to be taken in iscsit_conn_set_transport() during the reset, which prevents the ib_isert module from being unloaded after the NP thread shutdown has finished. Cc: stable@vger.kernel.org # v3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-08-22iscsi-target: Fix ImmediateData=Yes failure regression in >= v3.10Nicholas Bellinger1-7/+2
This patch addresses a regression bug within ImmediateData=Yes failure handling that ends up triggering an OOPs within >= v3.10 iscsi-target code. The problem occurs when iscsit_process_scsi_cmd() does the call to target_put_sess_cmd(), and once again in iscsit_get_immediate_data() that is triggered during two different cases: - When iscsit_sequence_cmd() returns CMDSN_LOWER_THAN_EXP, for which the descriptor state will already have been set to ISTATE_REMOVE by iscsit_sequence_cmd(), and - When iscsi_cmd->sense_reason is set, for which iscsit_execute_cmd() will have already called transport_send_check_condition_and_sense() to queue the exception response. It changes iscsit_process_scsi_cmd() to drop the early call, and makes iscsit_get_immediate_data() call target_put_sess_cmd() from a single location after dumping the immediate data for the failed command. The regression was initially introduced in commit: commit 561bf15892375597ee59d473a704a3e634c4f311 Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Wed Jul 3 03:58:58 2013 -0700 iscsi-target: Fix iscsit_sequence_cmd reject handling for iser Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-08-13iscsi-target: ST response on IN6ADDR_ANY socketChris Leech3-16/+16
Odd little issue, found that if you create an IPv6 portal bound to the IN6ADDR_ANY wildcard address it will accept IPv4 connections (as long as bindv6only isn't set globally) but respond to SendTargets requests with an IPv4-mapped IPv6 address. Example over loopback: In targetcli create a wildcard IPv6 portal /iscsi/iqn.../portals/> create :: Which should create a portal [::]:3260 Initiate SendTargets discovery to the portal using an IPv4 address # iscsiadm -m discovery -t st -p 127.0.0.1 The response formats TargetAddress as [::ffff:127.0.0.1]:3260,1 This still works and uses v4 on the network between two v6 sockets, but only if the initiator supports IPv6 with v4-mapped addresses. This change detects v4-mapped address on v6 sockets for the wildcard case, and instead formats the TargetAddress response as an IPv4 address. In order to not further complicate iscsit_build_sendtargets_response, I've actually simplified it by moving the bracket wrapping of IPv6 address into iscsit_accept_np where local_ip and login_ip strings are set. That also simplifies iscsi_stat_tgt_attr_show_attr_fail_intr_addr. Side effect of the string format change is that lio_target_nacl_show_info will now print login_ip bracket wrapped for IPv6 connections, as will a few debug prints. Signed-off-by: Chris Leech <cleech@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-08-13target: replace strict_strto*() with kstrto*()Jingoo Han9-52/+64
The usage of strict_strtoul() and strict_strtoull() is not preferred, because strict_strtoul() and strict_strtoull() are obsolete. Thus, kstrtoul() and kstrtoull() should be used. v2: Fix incorrect return in ft_add_tpg (Fengguang) Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-08-13target: Fix trailing ASCII space usage in INQUIRY vendor+modelNicholas Bellinger1-3/+6
This patch fixes spc_emulate_inquiry_std() to add trailing ASCII spaces for INQUIRY vendor + model fields following SPC-4 text: "ASCII data fields described as being left-aligned shall have any unused bytes at the end of the field (i.e., highest offset) and the unused bytes shall be filled with ASCII space characters (20h)." This addresses a problem with Falconstor NSS multipathing. Reported-by: Tomas Molota <tomas.molota@lightstorm.sk> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-11Merge branch 'for-next' of ↵Linus Torvalds23-847/+877
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "Lots of activity this round on performance improvements in target-core while benchmarking the prototype scsi-mq initiator code with vhost-scsi fabric ports, along with a number of iscsi/iser-target improvements and hardening fixes for exception path cases post v3.10 merge. The highlights include: - Make persistent reservations APTPL buffer allocated on-demand, and drop per t10_reservation buffer. (grover) - Make virtual LUN=0 a NULLIO device, and skip allocation of NULLIO device pages (grover) - Add transport_cmd_check_stop write_pending bit to avoid extra access of ->t_state_lock is WRITE I/O submission fast-path. (nab) - Drop unnecessary CMD_T_DEV_ACTIVE check from transport_lun_remove_cmd to avoid extra access of ->t_state_lock in release fast-path. (nab) - Avoid extra t_state_lock access in __target_execute_cmd fast-path (nab) - Drop unnecessary vhost-scsi wait_for_tasks=true usage + ->t_state_lock access in release fast-path. (nab) - Convert vhost-scsi to use modern se_cmd->cmd_kref TARGET_SCF_ACK_KREF usage (nab) - Add tracepoints for SCSI commands being processed (roland) - Refactoring of iscsi-target handling of ISCSI_OP_NOOP + ISCSI_OP_TEXT to be transport independent (nab) - Add iscsi-target SendTargets=$IQN support for in-band discovery (nab) - Add iser-target support for in-band discovery (nab + Or) - Add iscsi-target demo-mode TPG authentication context support (nab) - Fix isert_put_reject payload buffer post (nab) - Fix iscsit_add_reject* usage for iser (nab) - Fix iscsit_sequence_cmd reject handling for iser (nab) - Fix ISCSI_OP_SCSI_TMFUNC handling for iser (nab) - Fix session reset bug with RDMA_CM_EVENT_DISCONNECTED (nab) The last five iscsi/iser-target items are CC'ed to stable, as they do address issues present in v3.10 code. They are certainly larger than I'd like for stable patch set, but are important to ensure proper REJECT exception handling in iser-target for 3.10.y" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (51 commits) iser-target: Ignore non TEXT + LOGOUT opcodes for discovery target: make queue_tm_rsp() return void target: remove unused codes from enum tcm_tmrsp_table iscsi-target: kstrtou* configfs attribute parameter cleanups iscsi-target: Fix tfc_tpg_auth_cit configfs length overflow iscsi-target: Fix tfc_tpg_nacl_auth_cit configfs length overflow iser-target: Add support for ISCSI_OP_TEXT opcode + payload handling iser-target: Rename sense_buf_[dma,len] to pdu_[dma,len] iser-target: Add vendor_err debug output target: Add (obsolete) checking for PMI/LBA fields in READ CAPACITY(10) target: Return correct sense data for IO past the end of a device target: Add tracepoints for SCSI commands being processed iser-target: Fix session reset bug with RDMA_CM_EVENT_DISCONNECTED iscsi-target: Fix ISCSI_OP_SCSI_TMFUNC handling for iser iscsi-target: Fix iscsit_sequence_cmd reject handling for iser iscsi-target: Fix iscsit_add_reject* usage for iser iser-target: Fix isert_put_reject payload buffer post iscsi-target: missing kfree() on error path iscsi-target: Drop left-over iscsi_conn->bad_hdr target: Make core_scsi3_update_and_write_aptpl return sense_reason_t ...
2013-07-08target: make queue_tm_rsp() return voidJoern Engel5-10/+6
The return value wasn't checked by any of the callers. Assuming this is correct behaviour, we can simplify some code by not bothering to generate it. nab: Add srpt_queue_data_in() + srpt_queue_tm_rsp() nops around srpt_queue_response() void return Signed-off-by: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-08target: remove unused codes from enum tcm_tmrsp_tableJoern Engel2-5/+0
Three have been checked for but were never set. Remove the dead code. Also renumbers the remaining ones to a) get rid of the holes after the removal and b) avoid a collision between TMR_FUNCTION_COMPLETE==0 and the uninitialized case. If we failed to set a code, we should rather fall into the default case then return success. Signed-off-by: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-08iscsi-target: kstrtou* configfs attribute parameter cleanupsJörn Engel1-21/+32
This patch includes the conversion of iscsi-target configfs attributes for NetworkPortal, NodeACL, TPG, IQN and Discovery groups to use kstrtou*() instead of simple_strtou*(). It also cleans up new-line usage during iscsi_tpg_param_store_##name to use isspace(). Signed-off-by: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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