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* vhost-scsi: don't open-code kvfreeMichael S. Tsirkin2014-06-231-10/+2
| | | | | | | | | | Now that we have kvfree, use it in vhost-scsi instead of the open-coded version. Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* vhost-net: don't open-code kvfreeRomain Francoise2014-06-231-10/+2
| | | | | | | | | | | Commit 23cc5a991c ("vhost-net: extend device allocation to vmalloc") added another open-coded version of kvfree (which is available since v3.15-rc5), nuke it. Signed-off-by: Romain Francoise <romain@orebokech.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* Merge branch 'for-next' of ↵Linus Torvalds2014-06-121-96/+212
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "The highlights this round include: - Add support for T10 PI pass-through between vhost-scsi + virtio-scsi (MST + Paolo + MKP + nab) - Add support for T10 PI in qla2xxx target mode (Quinn + MKP + hch + nab, merged through scsi.git) - Add support for percpu-ida pre-allocation in qla2xxx target code (Quinn + nab) - A number of iser-target fixes related to hardening the network portal shutdown path (Sagi + Slava) - Fix response length residual handling for a number of control CDBs (Roland + Christophe V.) - Various iscsi RFC conformance fixes in the CHAP authentication path (Tejas and Calsoft folks + nab) - Return TASK_SET_FULL status for tcm_fc(FCoE) DataIn + Response failures (Vasu + Jun + nab) - Fix long-standing ABORT_TASK + session reset hang (nab) - Convert iser-initiator + iser-target to include T10 bytes into EDTL (Sagi + Or + MKP + Mike Christie) - Fix NULL pointer dereference regression related to XCOPY introduced in v3.15 + CC'ed to v3.12.y (nab)" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (34 commits) target: Fix NULL pointer dereference for XCOPY in target_put_sess_cmd vhost-scsi: Include prot_bytes into expected data transfer length TARGET/sbc,loopback: Adjust command data length in case pi exists on the wire libiscsi, iser: Adjust data_length to include protection information scsi_cmnd: Introduce scsi_transfer_length helper target: Report correct response length for some commands target/sbc: Check that the LBA and number of blocks are correct in VERIFY target/sbc: Remove sbc_check_valid_sectors() Target/iscsi: Fix sendtargets response pdu for iser transport Target/iser: Fix a wrong dereference in case discovery session is over iser iscsi-target: Fix ABORT_TASK + connection reset iscsi_queue_req memory leak target: Use complete_all for se_cmd->t_transport_stop_comp target: Set CMD_T_ACTIVE bit for Task Management Requests target: cleanup some boolean tests target/spc: Simplify INQUIRY EVPD=0x80 tcm_fc: Generate TASK_SET_FULL status for response failures tcm_fc: Generate TASK_SET_FULL status for DataIN failures iscsi-target: Reject mutual authentication with reflected CHAP_C iscsi-target: Remove no-op from iscsit_tpg_del_portal_group iscsi-target: Fix CHAP_A parameter list handling ...
| * vhost-scsi: Include prot_bytes into expected data transfer lengthNicholas Bellinger2014-06-111-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updates vhost_scsi_get_tag() to accept the combined expected data transfer length + T10 PI bytes as the value passed into target_submit_cmd(). This is required now that target-core logic in commit 14ef9200 expects to subtract se_cmd->prot_length from se_cmd->data_length. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * vhost/scsi: Enable T10 PI IOV -> SGL memory mappingNicholas Bellinger2014-06-021-59/+124
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updates vhost_scsi_handle_vq() to check for the existance of virtio_scsi_cmd_req_pi comparing vq->iov[0].iov_len in order to calculate seperate data + protection SGLs from data_num. Also update tcm_vhost_submission_work() to pass the pre-allocated cmd->tvc_prot_sgl[] memory into target_submit_cmd_map_sgls(), and update vhost_scsi_get_tag() parameters to accept scsi_tag, lun, and task_attr. Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Sagi Grimberg <sagig@dev.mellanox.co.il> Cc: H. Peter Anvin <hpa@zytor.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * vhost/scsi: Add T10 PI IOV -> SGL memory mapping logicNicholas Bellinger2014-06-021-1/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds vhost_scsi_map_iov_to_prot() to perform the mapping of T10 data integrity memory between virtio iov + struct scatterlist using get_user_pages_fast() following existing code. As with vhost_scsi_map_iov_to_sgl(), this does sanity checks against the total prot_sgl_count vs. pre-allocated SGLs, and loops across protection iovs using vhost_scsi_map_to_sgl() to perform the actual memory mapping. Also update tcm_vhost_release_cmd() to release associated tvc_prot_sgl[] struct page. Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Sagi Grimberg <sagig@dev.mellanox.co.il> Cc: H. Peter Anvin <hpa@zytor.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * vhost/scsi: Add preallocation of protection SGLsNicholas Bellinger2014-06-021-1/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updates tcm_vhost_make_nexus() to pre-allocate per descriptor tcm_vhost_cmd->tvc_prot_sgl[] used to expose protection SGLs from within virtio-scsi guest memory to vhost-scsi. Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * vhost/scsi: Move sanity check into vhost_scsi_map_iov_to_sglNicholas Bellinger2014-06-021-34/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the overflow check for sgl_count > TCM_VHOST_PREALLOC_SGLS into vhost_scsi_map_iov_to_sgl() so that it's based on the total number of SGLs for all IOVs, instead of single IOVs. Also, rename TCM_VHOST_PREALLOC_PAGES -> TCM_VHOST_PREALLOC_UPAGES to better describe pointers to user-space pages. Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* | Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds2014-06-115-87/+101
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull vhost infrastructure updates from Michael S. Tsirkin: "This reworks vhost core dropping unnecessary RCU uses in favor of VQ mutexes which are used on fast path anyway. This fixes worst-case latency for users which change the memory mappings a lot. Memory allocation for vhost-net now supports fallback on vmalloc (same as for vhost-scsi) this makes it possible to create the device on systems where memory is very fragmented, with slightly lower performance" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vhost: move memory pointer to VQs vhost: move acked_features to VQs vhost: replace rcu with mutex vhost-net: extend device allocation to vmalloc
| * | vhost: move memory pointer to VQsMichael S. Tsirkin2014-06-095-42/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 2ae76693b8bcabf370b981cd00c36cd41d33fabc vhost: replace rcu with mutex replaced rcu sync for memory accesses with VQ mutex locl/unlock. This is correct since all accesses are under VQ mutex, but incomplete: we still do useless rcu lock/unlock operations, someone might copy this code into some other context where this won't be right. This use of RCU is also non standard and hard to understand. Let's copy the pointer to each VQ structure, this way the access rules become straight-forward, and there's no need for RCU anymore. Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| * | vhost: move acked_features to VQsMichael S. Tsirkin2014-06-095-42/+44
| | | | | | | | | | | | | | | | | | | | | | | | Refactor code to make sure features are only accessed under VQ mutex. This makes everything simpler, no need for RCU here anymore. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| * | vhost: replace rcu with mutexMichael S. Tsirkin2014-06-091-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All memory accesses are done under some VQ mutex. So lock/unlock all VQs is a faster equivalent of synchronize_rcu() for memory access changes. Some guests cause a lot of these changes, so it's helpful to make them faster. Reported-by: "Gonglei (Arei)" <arei.gonglei@huawei.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| * | vhost-net: extend device allocation to vmallocMichael S. Tsirkin2014-06-091-5/+18
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Michael Mueller provided a patch to reduce the size of vhost-net structure as some allocations could fail under memory pressure/fragmentation. We are still left with high order allocations though. This patch is handling the problem at the core level, allowing vhost structures to use vmalloc() if kmalloc() failed. As vmalloc() adds overhead on a critical network path, add __GFP_REPEAT to kzalloc() flags to do this fallback only when really needed. People are still looking at cleaner ways to handle the problem at the API level, probably passing in multiple iovecs. This hack seems consistent with approaches taken since then by drivers/vhost/scsi.c and net/core/dev.c Based on patch by Romain Francoise. Cc: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: Romain Francoise <romain@orebokech.com> Acked-by: Michael S. Tsirkin <mst@redhat.com>
* / arch: Mass conversion of smp_mb__*()Peter Zijlstra2014-04-181-1/+1
|/ | | | | | | | | | | Mostly scripted conversion of the smp_mb__* barriers. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Link: http://lkml.kernel.org/n/tip-55dhyhocezdw1dg7u19hmh1u@git.kernel.org Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-arch@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Merge branch 'for-next' of ↵Linus Torvalds2014-04-121-1/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "Here are the target pending updates for v3.15-rc1. Apologies in advance for waiting until the second to last day of the merge window to send these out. The highlights this round include: - iser-target support for T10 PI (DIF) offloads (Sagi + Or) - Fix Task Aborted Status (TAS) handling in target-core (Alex Leung) - Pass in transport supported PI at session initialization (Sagi + MKP + nab) - Add WRITE_INSERT + READ_STRIP T10 PI support in target-core (nab + Sagi) - Fix iscsi-target ERL=2 ASYNC_EVENT connection pointer bug (nab) - Fix tcm_fc use-after-free of ft_tpg (Andy Grover) - Use correct ib_sg_dma primitives in ib_isert (Mike Marciniszyn) Also, note the virtio-scsi + vhost-scsi changes to expose T10 PI metadata into KVM guest have been left-out for now, as there where a few comments from MST + Paolo that where not able to be addressed in time for v3.15. Please expect this feature for v3.16-rc1" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (43 commits) ib_srpt: Use correct ib_sg_dma primitives target/tcm_fc: Rename ft_tport_create to ft_tport_get target/tcm_fc: Rename ft_{add,del}_lport to {add,del}_wwn target/tcm_fc: Rename structs and list members for clarity target/tcm_fc: Limit to 1 TPG per wwn target/tcm_fc: Don't export ft_lport_list target/tcm_fc: Fix use-after-free of ft_tpg target: Add check to prevent Abort Task from aborting itself target: Enable READ_STRIP emulation in target_complete_ok_work target/sbc: Add sbc_dif_read_strip software emulation target: Enable WRITE_INSERT emulation in target_execute_cmd target/sbc: Add sbc_dif_generate software emulation target/sbc: Only expose PI read_cap16 bits when supported by fabric target/spc: Only expose PI mode page bits when supported by fabric target/spc: Only expose PI inquiry bits when supported by fabric target: Pass in transport supported PI at session initialization target/iblock: Fix double bioset_integrity_free bug Target/sbc: Initialize COMPARE_AND_WRITE write_sg scatterlist target/rd: T10-Dif: RAM disk is allocating more space than required. iscsi-target: Fix ERL=2 ASYNC_EVENT connection pointer bug ...
| * target: Pass in transport supported PI at session initializationNicholas Bellinger2014-04-071-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to support local WRITE_INSERT + READ_STRIP operations for non PI enabled fabrics, the fabric driver needs to be able signal what protection offload operations are supported. This is done at session initialization time so the modes can be signaled by individual se_wwn + se_portal_group endpoints, as well as optionally across different transports on the same endpoint. For iser-target, set TARGET_PROT_ALL if the underlying ib_device has already signaled PI offload support, and allow this to be exposed via a new iscsit_transport->iscsit_get_sup_prot_ops() callback. For loopback, set TARGET_PROT_ALL to signal SCSI initiator mode operation. For all other drivers, set TARGET_PROT_NORMAL to disable fabric level PI. Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Add TFO->abort_task for aborted task resources releaseNicholas Bellinger2014-04-071-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that TASK_ABORTED status is not generated for all cases by TMR ABORT_TASK + LUN_RESET, a new TFO->abort_task() caller is necessary in order to give fabric drivers a chance to unmap hardware / software resources before the se_cmd descriptor is released via the normal TFO->release_cmd() codepath. This patch adds TFO->aborted_task() in core_tmr_abort_task() in place of the original transport_send_task_abort(), and also updates all fabric drivers to implement this caller. The fabric drivers that include changes to perform cleanup via ->aborted_task() are: - iscsi-target - iser-target - srpt - tcm_qla2xxx The fabric drivers that currently set ->aborted_task() to NOPs are: - loopback - tcm_fc - usb-gadget - sbp-target - vhost-scsi For the latter five, there appears to be no additional cleanup required before invoking TFO->release_cmd() to release the se_cmd descriptor. v2 changes: - Move ->aborted_task() call into transport_cmd_finish_abort (Alex) Cc: Alex Leung <amleung21@yahoo.com> Cc: Mark Rustad <mark.d.rustad@intel.com> Cc: Roland Dreier <roland@kernel.org> Cc: Vu Pham <vu@mellanox.com> Cc: Chris Boot <bootc@bootc.net> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Cc: Saurav Kashyap <saurav.kashyap@qlogic.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* | vhost: don't open-code sockfd_put()Al Viro2014-04-011-7/+7
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | vhost: validate vhost_get_vq_desc return valueMichael S. Tsirkin2014-03-281-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | vhost fails to validate negative error code from vhost_get_vq_desc causing a crash: we are using -EFAULT which is 0xfffffff2 as vector size, which exceeds the allocated size. The code in question was introduced in commit 8dd014adfea6f173c1ef6378f7e5e7924866c923 vhost-net: mergeable buffers support CVE-2014-0055 Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | vhost: fix total length when packets are too shortMichael S. Tsirkin2014-03-281-0/+14
|/ | | | | | | | | | | | | | | | | | | | | | When mergeable buffers are disabled, and the incoming packet is too large for the rx buffer, get_rx_bufs returns success. This was intentional in order for make recvmsg truncate the packet and then handle_rx would detect err != sock_len and drop it. Unfortunately we pass the original sock_len to recvmsg - which means we use parts of iov not fully validated. Fix this up by detecting this overrun and doing packet drop immediately. CVE-2014-0077 Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pendingLinus Torvalds2014-03-011-0/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull SCSI target fixes from Nicholas Bellinger: "The bulk of the series are bugfixes for qla2xxx target NPIV support that went in for v3.14-rc1. Also included are a few DIF related fixes, a qla2xxx fix (Cc'ed to stable) from Greg W., and vhost/scsi protocol version related fix from Venkatesh. Also just a heads up that a series to address a number of issues with iser-target active I/O reset/shutdown is still being tested, and will be included in a separate -rc6 PULL request" * git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: vhost/scsi: Check LUN structure byte 0 is set to 1, per spec qla2xxx: Fix kernel panic on selective retransmission request Target/sbc: Don't use sg as iterator in sbc_verify_read target: Add DIF sense codes in transport_generic_request_failure target/sbc: Fix sbc_dif_copy_prot addr offset bug tcm_qla2xxx: Fix NAA formatted name for NPIV WWPNs tcm_qla2xxx: Perform configfs depend/undepend for base_tpg tcm_qla2xxx: Add NPIV specific enable/disable attribute logic qla2xxx: Check + fail when npiv_vports_inuse exists in shutdown qla2xxx: Fix qlt_lport_register base_vha callback race
| * vhost/scsi: Check LUN structure byte 0 is set to 1, per specVenkatesh Srinivas2014-02-241-0/+6
| | | | | | | | | | | | | | | | | | The virtio spec requires byte 0 of the virtio-scsi LUN structure to be '1'. Signed-off-by: Venkatesh Srinivas <venkateshs@google.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* | vhost: fix a theoretical race in device cleanupMichael S. Tsirkin2014-02-131-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | vhost_zerocopy_callback accesses VQ right after it drops a ubuf reference. In theory, this could race with device removal which waits on the ubuf kref, and crash on use after free. Do all accesses within rcu read side critical section, and synchronize on release. Since callbacks are always invoked from bh, synchronize_rcu_bh seems enough and will help release complete a bit faster. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | vhost: fix ref cnt checking deadlockMichael S. Tsirkin2014-02-131-21/+20
|/ | | | | | | | | | | | | | | | | | | | | | | | vhost checked the counter within the refcnt before decrementing. It really wanted to know that it is the one that has the last reference, as a way to batch freeing resources a bit more efficiently. Note: we only let refcount go to 0 on device release. This works well but we now access the ref counter twice so there's a race: all users might see a high count and decide to defer freeing resources. In the end no one initiates freeing resources until the last reference is gone (which is on VM shotdown so might happen after a looooong time). Let's do what we probably should have done straight away: switch from kref to plain atomic, documenting the semantics, return the refcount value atomically after decrement, then use that to avoid the deadlock. Reported-by: Qin Chuanyu <qinchuanyu@huawei.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'for-next' of ↵Linus Torvalds2014-01-311-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "The highlights this round include: - add support for SCSI Referrals (Hannes) - add support for T10 DIF into target core (nab + mkp) - add support for T10 DIF emulation in FILEIO + RAMDISK backends (Sagi + nab) - add support for T10 DIF -> bio_integrity passthrough in IBLOCK backend (nab) - prep changes to iser-target for >= v3.15 T10 DIF support (Sagi) - add support for qla2xxx N_Port ID Virtualization - NPIV (Saurav + Quinn) - allow percpu_ida_alloc() to receive task state bitmask (Kent) - fix >= v3.12 iscsi-target session reset hung task regression (nab) - fix >= v3.13 percpu_ref se_lun->lun_ref_active race (nab) - fix a long-standing network portal creation race (Andy)" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (51 commits) target: Fix percpu_ref_put race in transport_lun_remove_cmd target/iscsi: Fix network portal creation race target: Report bad sector in sense data for DIF errors iscsi-target: Convert gfp_t parameter to task state bitmask iscsi-target: Fix connection reset hang with percpu_ida_alloc percpu_ida: Make percpu_ida_alloc + callers accept task state bitmask iscsi-target: Pre-allocate more tags to avoid ack starvation qla2xxx: Configure NPIV fc_vport via tcm_qla2xxx_npiv_make_lport qla2xxx: Enhancements to enable NPIV support for QLOGIC ISPs with TCM/LIO. qla2xxx: Fix scsi_host leak on qlt_lport_register callback failure IB/isert: pass scatterlist instead of cmd to fast_reg_mr routine IB/isert: Move fastreg descriptor creation to a function IB/isert: Avoid frwr notation, user fastreg IB/isert: seperate connection protection domains and dma MRs tcm_loop: Enable DIF/DIX modes in SCSI host LLD target/rd: Add DIF protection into rd_execute_rw target/rd: Add support for protection SGL setup + release target/rd: Refactor rd_build_device_space + rd_release_device_space target/file: Add DIF protection support to fd_execute_rw target/file: Add DIF protection init/format support ...
| * percpu_ida: Make percpu_ida_alloc + callers accept task state bitmaskKent Overstreet2014-01-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes percpu_ida_alloc() + callers to accept task state bitmask for prepare_to_wait() for code like target/iscsi that needs it for interruptible sleep, that is provided in a subsequent patch. It now expects TASK_UNINTERRUPTIBLE when the caller is able to sleep waiting for a new tag, or TASK_RUNNING when the caller cannot sleep, and is forced to return a negative value when no tags are available. v2 changes: - Include blk-mq + tcm_fc + vhost/scsi + target/iscsi changes - Drop signal_pending_state() call v3 changes: - Only call prepare_to_wait() + finish_wait() when != TASK_RUNNING (PeterZ) Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: <stable@vger.kernel.org> #3.12+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * target: Add protection SGLs to target_submit_cmd_map_sglsNicholas Bellinger2014-01-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support to target_submit_cmd_map_sgls() for accepting 'sgl_prot' + 'sgl_prot_count' parameters for DIF protection information. Note the passed parameters are stored at se_cmd->t_prot_sg and se_cmd->t_prot_nents respectively. Also, update tcm_loop and vhost-scsi fabrics usage of target_submit_cmd_map_sgls() to take into account the new parameters. Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* | vhost: remove the dead branchZhi Yong Wu2013-12-065-24/+6
|/ | | | | | | | | Since vhost_dev_init() forever return 0, some branches are never run, therefore need to be removed. Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'for-next' of ↵Linus Torvalds2013-11-221-9/+9
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "Things have been quiet this round with mostly bugfixes, percpu conversions, and other minor iscsi-target conformance testing changes. The highlights include: - Add demo_mode_discovery attribute for iscsi-target (Thomas) - Convert tcm_fc(FCoE) to use percpu-ida pre-allocation - Add send completion interrupt coalescing for ib_isert - Convert target-core to use percpu-refcounting for se_lun - Fix mutex_trylock usage bug in iscsit_increment_maxcmdsn - tcm_loop updates (Hannes) - target-core ALUA cleanups + prep for v3.14 SCSI Referrals support (Hannes) v3.14 is currently shaping to be a busy development cycle in target land, with initial support for T10 Referrals and T10 DIF currently on the roadmap" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (40 commits) iscsi-target: chap auth shouldn't match username with trailing garbage iscsi-target: fix extract_param to handle buffer length corner case iscsi-target: Expose default_erl as TPG attribute target_core_configfs: split up ALUA supported states target_core_alua: Make supported states configurable target_core_alua: Store supported ALUA states target_core_alua: Rename ALUA_ACCESS_STATE_OPTIMIZED target_core_alua: spellcheck target core: rename (ex,im)plict -> (ex,im)plicit percpu-refcount: Add percpu-refcount.o to obj-y iscsi-target: Do not reject non-immediate CmdSNs exceeding MaxCmdSN iscsi-target: Convert iscsi_session statistics to atomic_long_t target: Convert se_device statistics to atomic_long_t target: Fix delayed Task Aborted Status (TAS) handling bug iscsi-target: Reject unsupported multi PDU text command sequence ib_isert: Avoid duplicate iscsit_increment_maxcmdsn call iscsi-target: Fix mutex_trylock usage in iscsit_increment_maxcmdsn target: Core does not need blkdev.h target: Pass through I/O topology for block backstores iser-target: Avoid using FRMR for single dma entry requests ...
| * target: Remove TF_CIT_TMPL macroAndy Grover2013-10-161-9/+9
| | | | | | | | | | | | | | | | Remove a lingering macro that just hid a dereference. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* | vhost/scsi: Fix incorrect usage of get_user_pages_fast write parameterNicholas Bellinger2013-10-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch addresses a long-standing bug where the get_user_pages_fast() write parameter used for setting the underlying page table entry permission bits was incorrectly set to write=1 for data_direction=DMA_TO_DEVICE, and passed into get_user_pages_fast() via vhost_scsi_map_iov_to_sgl(). However, this parameter is intended to signal WRITEs to pinned userspace PTEs for the virtio-scsi DMA_FROM_DEVICE -> READ payload case, and *not* for the virtio-scsi DMA_TO_DEVICE -> WRITE payload case. This bug would manifest itself as random process segmentation faults on KVM host after repeated vhost starts + stops and/or with lots of vhost endpoints + LUNs. Cc: Stefan Hajnoczi <stefanha@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Asias He <asias@redhat.com> Cc: <stable@vger.kernel.org> # 3.6+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* | vhost/scsi: Use GFP_ATOMIC with percpu_ida_alloc for obtaining tagNicholas Bellinger2013-10-011-1/+6
|/ | | | | | | | | | | | | | | Fix GFP_KERNEL -> GFP_ATOMIC usage of percpu_ida_alloc() within vhost_scsi_get_tag(), as this code is expected to be called directly from interrupt context. v2 changes: - Handle possible tag < 0 failure with GFP_ATOMIC Acked-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Asias He <asias@redhat.com> Cc: Kent Overstreet <kmo@daterainc.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* vhost-scsi: whitespace tweakMichael S. Tsirkin2013-09-171-1/+1
| | | | | | Remove space at start of line that sneaked in. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* vhost/scsi: use vmalloc for order-10 allocationMichael S. Tsirkin2013-09-171-14/+27
| | | | | | | | | | | | | As vhost scsi device struct is large, if the device is created on a busy system, kzalloc() might fail, so this patch does a fallback to vzalloc(). As vmalloc() adds overhead on data-path, add __GFP_REPEAT to kzalloc() flags to do this fallback only when really needed. Reviewed-by: Asias He <asias@redhat.com> Reported-by: Dan Aloni <alonid@stratoscale.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* vhost: wake up worker outside spin_lockQin Chuanyu2013-09-171-1/+3
| | | | | | | | | | | | | | | | | the wake_up_process func is included by spin_lock/unlock in vhost_work_queue, but it could be done outside the spin_lock. I have test it with kernel 3.0.27 and guest suse11-sp2 using iperf, the num as below. original modified thread_num tp(Gbps) vhost(%) | tp(Gbps) vhost(%) 1 9.59 28.82 | 9.59 27.49 8 9.61 32.92 | 9.62 26.77 64 9.58 46.48 | 9.55 38.99 256 9.6 63.7 | 9.6 52.59 Signed-off-by: Chuanyu Qin <qinchuanyu@huawei.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* Merge branch 'for-next' of ↵Linus Torvalds2013-09-121-33/+103
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
| * target: Update copyright ownership/year information to 2013Nicholas Bellinger2013-09-101-2/+2
| | | | | | | | | | | | | | 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>
| * vhost/scsi: Add pre-allocation for tv_cmd SGL + upages memoryNicholas Bellinger2013-09-091-19/+80
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for pre-allocation of per tv_cmd descriptor scatterlist + user-space page pointer memory using se_sess->sess_cmd_map within tcm_vhost_make_nexus() code. This includes sanity checks within vhost_scsi_map_to_sgl() to reject I/O that exceeds these initial hardcoded values, and the necessary cleanup in tcm_vhost_make_nexus() failure path + tcm_vhost_drop_nexus(). v3 changes: - Rebase to v3.11-rc5 code Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Asias He <asias@redhat.com> Cc: Kent Overstreet <kmo@daterainc.com> Reviewed-by: Asias He <asias@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| * vhost/scsi: Convert to per-cpu ida_alloc + ida_free command mapNicholas Bellinger2013-09-091-12/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes vhost/scsi to use transport_init_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. FIXME: Make transport_init_session_tags() number of tags setup configurable per vring client setting via configfs v5 changes: - Convert to percpu_ida.h include v3 changes: - Update to percpu-ida usage - Rebase to v3.11-rc5 code Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Asias He <asias@redhat.com> Cc: Kent Overstreet <kmo@daterainc.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
* | vhost_net: correctly limit the max pending buffersJason Wang2013-09-031-11/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | As Michael point out, We used to limit the max pending DMAs to get better cache utilization. But it was not done correctly since it was one done when there's no new buffers submitted from guest. Guest can easily exceeds the limitation by keeping sending packets. So this patch moves the check into main loop. Tests shows about 5%-10% improvement on per cpu throughput for guest tx. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | vhost_net: poll vhost queue after marking DMA is doneJason Wang2013-09-031-4/+5
| | | | | | | | | | | | | | | | | | We used to poll vhost queue before making DMA is done, this is racy if vhost thread were waked up before marking DMA is done which can result the signal to be missed. Fix this by always polling the vhost thread before DMA is done. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | vhost_net: determine whether or not to use zerocopy at one timeJason Wang2013-09-031-27/+20
| | | | | | | | | | | | | | | | | | | | Currently, even if the packet length is smaller than VHOST_GOODCOPY_LEN, if upend_idx != done_idx we still set zcopy_used to true and rollback this choice later. This could be avoided by determining zerocopy once by checking all conditions at one time before. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | vhost: switch to use vhost_add_used_n()Jason Wang2013-09-031-42/+12
| | | | | | | | | | | | | | | | | | Let vhost_add_used() to use vhost_add_used_n() to reduce the code duplication. To avoid the overhead brought by __copy_to_user(). We will use put_user() when one used need to be added. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | vhost_net: use vhost_add_used_and_signal_n() in vhost_zerocopy_signal_used()Jason Wang2013-09-031-5/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We tend to batch the used adding and signaling in vhost_zerocopy_callback() which may result more than 100 used buffers to be updated in vhost_zerocopy_signal_used() in some cases. So switch to use vhost_add_used_and_signal_n() to avoid multiple calls to vhost_add_used_and_signal(). Which means much less times of used index updating and memory barriers. 2% performance improvement were seen on netperf TCP_RR test. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | vhost_net: make vhost_zerocopy_signal_used() return voidJason Wang2013-09-031-3/+2
| | | | | | | | | | | | | | None of its caller use its return value, so let it return void. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | vhost: Include linux/uio.h instead of linux/socket.hAsias He2013-08-201-1/+1
|/ | | | | | | | | | | memcpy_fromiovec is moved from net/core/iovec.c to lib/iovec.c. linux/uio.h provides the declaration for memcpy_fromiovec. Include linux/uio.h instead of inux/socket.h for it. Signed-off-by: Asias He <asias@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds2013-07-234-44/+26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull vhost fixes from Michael Tsirkin: "vhost: more fixes for 3.11 This includes some fixes for vhost net and scsi drivers. The test module has already been reworked to avoid rcu usage, but the necessary core changes are missing, we fixed this. Unlikely to affect any real-world users, but it's early in the cycle so, let's merge them" (It was earlier when Michael originally sent the email, but it somehot got missed in the flood, so here it is after -rc2) * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vhost: Remove custom vhost rcu usage vhost-scsi: Always access vq->private_data under vq mutex vhost-net: Always access vq->private_data under vq mutex
| * vhost: Remove custom vhost rcu usageAsias He2013-07-114-26/+12
| | | | | | | | | | | | | | | | Now, vq->private_data is always accessed under vq mutex. No need to play the vhost rcu trick. Signed-off-by: Asias He <asias@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| * vhost-scsi: Always access vq->private_data under vq mutexAsias He2013-07-111-7/+4
| | | | | | | | | | Signed-off-by: Asias He <asias@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| * vhost-net: Always access vq->private_data under vq mutexAsias He2013-07-111-11/+10
| | | | | | | | | | Signed-off-by: Asias He <asias@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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