2012-07-18 15:31:32 -06:00
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/*******************************************************************************
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* Vhost kernel TCM fabric driver for virtio SCSI initiators
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*
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2013-09-05 16:29:12 -06:00
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* (C) Copyright 2010-2013 Datera, Inc.
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2012-07-18 15:31:32 -06:00
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* (C) Copyright 2010-2012 IBM Corp.
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*
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* Licensed to the Linux Foundation under the General Public License (GPL) version 2.
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*
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2013-09-05 16:29:12 -06:00
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* Authors: Nicholas A. Bellinger <nab@daterainc.com>
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2012-07-18 15:31:32 -06:00
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* Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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****************************************************************************/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <generated/utsrelease.h>
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#include <linux/utsname.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/kthread.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/configfs.h>
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#include <linux/ctype.h>
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#include <linux/compat.h>
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#include <linux/eventfd.h>
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#include <linux/fs.h>
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2015-05-28 12:35:41 -06:00
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#include <linux/vmalloc.h>
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2012-07-18 15:31:32 -06:00
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#include <linux/miscdevice.h>
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#include <asm/unaligned.h>
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2015-05-08 02:11:12 -06:00
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#include <scsi/scsi_common.h>
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#include <scsi/scsi_proto.h>
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2012-07-18 15:31:32 -06:00
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#include <target/target_core_base.h>
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#include <target/target_core_fabric.h>
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#include <linux/vhost.h>
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#include <linux/virtio_scsi.h>
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2013-01-05 23:36:13 -07:00
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#include <linux/llist.h>
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tcm_vhost: Multi-queue support
This adds virtio-scsi multi-queue support to tcm_vhost. In order to use
multi-queue, guest side multi-queue support is need. It can
be found here:
https://lkml.org/lkml/2012/12/18/166
Currently, only one thread is created by vhost core code for each
vhost_scsi instance. Even if there are multi-queues, all the handling of
guest kick (vhost_scsi_handle_kick) are processed in one thread. This is
not optimal. Luckily, most of the work is offloaded to the tcm_vhost
workqueue.
Some initial perf numbers:
1 queue, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 127K/127k IOPS
4 queues, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 181K/181k IOPS
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-02-05 22:20:59 -07:00
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#include <linux/bitmap.h>
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2012-07-18 15:31:32 -06:00
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#include "vhost.h"
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2013-05-01 18:50:34 -06:00
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2015-02-01 00:56:53 -07:00
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#define VHOST_SCSI_VERSION "v0.1"
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#define VHOST_SCSI_NAMELEN 256
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#define VHOST_SCSI_MAX_CDB_SIZE 32
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#define VHOST_SCSI_DEFAULT_TAGS 256
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#define VHOST_SCSI_PREALLOC_SGLS 2048
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#define VHOST_SCSI_PREALLOC_UPAGES 2048
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2018-08-08 13:29:55 -06:00
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#define VHOST_SCSI_PREALLOC_PROT_SGLS 2048
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2013-05-01 18:50:34 -06:00
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struct vhost_scsi_inflight {
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/* Wait for the flush operation to finish */
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struct completion comp;
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/* Refcount for the inflight reqs */
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struct kref kref;
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};
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2015-02-01 00:56:53 -07:00
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struct vhost_scsi_cmd {
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2013-05-01 18:50:34 -06:00
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/* Descriptor from vhost_get_vq_desc() for virt_queue segment */
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int tvc_vq_desc;
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/* virtio-scsi initiator task attribute */
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int tvc_task_attr;
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2015-01-27 14:13:12 -07:00
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/* virtio-scsi response incoming iovecs */
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int tvc_in_iovs;
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2013-05-01 18:50:34 -06:00
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/* virtio-scsi initiator data direction */
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enum dma_data_direction tvc_data_direction;
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/* Expected data transfer length from virtio-scsi header */
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u32 tvc_exp_data_len;
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/* The Tag from include/linux/virtio_scsi.h:struct virtio_scsi_cmd_req */
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u64 tvc_tag;
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/* The number of scatterlists associated with this cmd */
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u32 tvc_sgl_count;
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2014-02-22 19:34:43 -07:00
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u32 tvc_prot_sgl_count;
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2015-02-01 00:56:53 -07:00
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/* Saved unpacked SCSI LUN for vhost_scsi_submission_work() */
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2013-05-01 18:50:34 -06:00
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u32 tvc_lun;
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/* Pointer to the SGL formatted memory from virtio-scsi */
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struct scatterlist *tvc_sgl;
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2014-02-22 19:08:24 -07:00
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struct scatterlist *tvc_prot_sgl;
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2013-06-21 15:32:04 -06:00
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struct page **tvc_upages;
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2015-01-27 14:13:12 -07:00
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/* Pointer to response header iovec */
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2016-06-06 16:07:59 -06:00
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struct iovec tvc_resp_iov;
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2013-05-01 18:50:34 -06:00
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/* Pointer to vhost_scsi for our device */
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struct vhost_scsi *tvc_vhost;
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/* Pointer to vhost_virtqueue for the cmd */
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struct vhost_virtqueue *tvc_vq;
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/* Pointer to vhost nexus memory */
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2015-02-01 00:56:53 -07:00
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struct vhost_scsi_nexus *tvc_nexus;
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2013-05-01 18:50:34 -06:00
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/* The TCM I/O descriptor that is accessed via container_of() */
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struct se_cmd tvc_se_cmd;
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2015-02-01 00:56:53 -07:00
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/* work item used for cmwq dispatch to vhost_scsi_submission_work() */
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2013-05-01 18:50:34 -06:00
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struct work_struct work;
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/* Copy of the incoming SCSI command descriptor block (CDB) */
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2015-02-01 00:56:53 -07:00
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unsigned char tvc_cdb[VHOST_SCSI_MAX_CDB_SIZE];
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2013-05-01 18:50:34 -06:00
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/* Sense buffer that will be mapped into outgoing status */
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unsigned char tvc_sense_buf[TRANSPORT_SENSE_BUFFER];
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/* Completed commands list, serviced from vhost worker thread */
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struct llist_node tvc_completion_list;
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/* Used to track inflight cmd */
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struct vhost_scsi_inflight *inflight;
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};
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2015-02-01 00:56:53 -07:00
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struct vhost_scsi_nexus {
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2013-05-01 18:50:34 -06:00
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/* Pointer to TCM session for I_T Nexus */
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struct se_session *tvn_se_sess;
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};
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2015-02-01 00:56:53 -07:00
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struct vhost_scsi_tpg {
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2013-05-01 18:50:34 -06:00
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/* Vhost port target portal group tag for TCM */
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u16 tport_tpgt;
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/* Used to track number of TPG Port/Lun Links wrt to explict I_T Nexus shutdown */
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int tv_tpg_port_count;
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/* Used for vhost_scsi device reference to tpg_nexus, protected by tv_tpg_mutex */
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int tv_tpg_vhost_count;
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2015-03-28 01:03:51 -06:00
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/* Used for enabling T10-PI with legacy devices */
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int tv_fabric_prot_type;
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2015-02-01 00:56:53 -07:00
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/* list for vhost_scsi_list */
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2013-05-01 18:50:34 -06:00
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struct list_head tv_tpg_list;
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/* Used to protect access for tpg_nexus */
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struct mutex tv_tpg_mutex;
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/* Pointer to the TCM VHost I_T Nexus for this TPG endpoint */
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2015-02-01 00:56:53 -07:00
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struct vhost_scsi_nexus *tpg_nexus;
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/* Pointer back to vhost_scsi_tport */
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struct vhost_scsi_tport *tport;
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/* Returned by vhost_scsi_make_tpg() */
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2013-05-01 18:50:34 -06:00
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struct se_portal_group se_tpg;
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/* Pointer back to vhost_scsi, protected by tv_tpg_mutex */
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struct vhost_scsi *vhost_scsi;
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};
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2015-02-01 00:56:53 -07:00
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struct vhost_scsi_tport {
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2013-05-01 18:50:34 -06:00
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/* SCSI protocol the tport is providing */
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u8 tport_proto_id;
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/* Binary World Wide unique Port Name for Vhost Target port */
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u64 tport_wwpn;
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/* ASCII formatted WWPN for Vhost Target port */
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2015-02-01 00:56:53 -07:00
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char tport_name[VHOST_SCSI_NAMELEN];
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/* Returned by vhost_scsi_make_tport() */
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2013-05-01 18:50:34 -06:00
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struct se_wwn tport_wwn;
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};
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2015-02-01 00:56:53 -07:00
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struct vhost_scsi_evt {
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2013-05-01 18:50:34 -06:00
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/* event to be sent to guest */
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struct virtio_scsi_event event;
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/* event list, serviced from vhost worker thread */
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struct llist_node list;
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};
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2012-07-18 15:31:32 -06:00
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2012-07-30 14:30:00 -06:00
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enum {
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VHOST_SCSI_VQ_CTL = 0,
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VHOST_SCSI_VQ_EVT = 1,
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VHOST_SCSI_VQ_IO = 2,
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};
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2014-11-23 09:01:34 -07:00
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/* Note: can't set VIRTIO_F_VERSION_1 yet, since that implies ANY_LAYOUT. */
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2013-03-27 18:23:41 -06:00
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enum {
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2014-02-22 19:22:31 -07:00
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VHOST_SCSI_FEATURES = VHOST_FEATURES | (1ULL << VIRTIO_SCSI_F_HOTPLUG) |
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2015-09-09 13:24:56 -06:00
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(1ULL << VIRTIO_SCSI_F_T10_PI)
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2013-03-27 18:23:41 -06:00
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};
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tcm_vhost: Multi-queue support
This adds virtio-scsi multi-queue support to tcm_vhost. In order to use
multi-queue, guest side multi-queue support is need. It can
be found here:
https://lkml.org/lkml/2012/12/18/166
Currently, only one thread is created by vhost core code for each
vhost_scsi instance. Even if there are multi-queues, all the handling of
guest kick (vhost_scsi_handle_kick) are processed in one thread. This is
not optimal. Luckily, most of the work is offloaded to the tcm_vhost
workqueue.
Some initial perf numbers:
1 queue, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 127K/127k IOPS
4 queues, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 181K/181k IOPS
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-02-05 22:20:59 -07:00
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#define VHOST_SCSI_MAX_TARGET 256
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#define VHOST_SCSI_MAX_VQ 128
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2013-04-25 01:35:21 -06:00
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#define VHOST_SCSI_MAX_EVENT 128
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2013-02-04 21:31:57 -07:00
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2013-04-26 21:16:48 -06:00
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struct vhost_scsi_virtqueue {
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struct vhost_virtqueue vq;
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2013-04-28 06:38:52 -06:00
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/*
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* Reference counting for inflight reqs, used for flush operation. At
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* each time, one reference tracks new commands submitted, while we
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* wait for another one to reach 0.
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*/
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2013-04-26 21:16:49 -06:00
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struct vhost_scsi_inflight inflights[2];
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2013-04-28 06:38:52 -06:00
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/*
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* Indicate current inflight in use, protected by vq->mutex.
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* Writers must also take dev mutex and flush under it.
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*/
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2013-04-26 21:16:49 -06:00
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int inflight_idx;
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2013-04-26 21:16:48 -06:00
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};
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2012-07-18 15:31:32 -06:00
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struct vhost_scsi {
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2013-02-04 21:31:57 -07:00
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/* Protected by vhost_scsi->dev.mutex */
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2015-02-01 00:56:53 -07:00
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struct vhost_scsi_tpg **vs_tpg;
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2013-02-04 21:31:57 -07:00
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char vs_vhost_wwpn[TRANSPORT_IQN_LEN];
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2012-07-18 15:31:32 -06:00
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struct vhost_dev dev;
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2013-04-26 21:16:48 -06:00
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struct vhost_scsi_virtqueue vqs[VHOST_SCSI_MAX_VQ];
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2012-07-18 15:31:32 -06:00
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struct vhost_work vs_completion_work; /* cmd completion work item */
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2013-01-05 23:36:13 -07:00
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struct llist_head vs_completion_list; /* cmd completion queue */
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2013-04-25 01:35:21 -06:00
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struct vhost_work vs_event_work; /* evt injection work item */
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struct llist_head vs_event_list; /* evt injection queue */
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bool vs_events_missed; /* any missed events, protected by vq->mutex */
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int vs_events_nr; /* num of pending events, protected by vq->mutex */
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2012-07-18 15:31:32 -06:00
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};
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2018-09-17 18:09:48 -06:00
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/*
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* Context for processing request and control queue operations.
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*/
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struct vhost_scsi_ctx {
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int head;
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unsigned int out, in;
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size_t req_size, rsp_size;
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size_t out_size, in_size;
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u8 *target, *lunp;
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void *req;
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struct iov_iter out_iter;
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};
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2015-02-01 00:56:53 -07:00
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static struct workqueue_struct *vhost_scsi_workqueue;
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2012-07-18 15:31:32 -06:00
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2015-02-01 00:56:53 -07:00
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/* Global spinlock to protect vhost_scsi TPG list for vhost IOCTL access */
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static DEFINE_MUTEX(vhost_scsi_mutex);
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static LIST_HEAD(vhost_scsi_list);
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2012-07-18 15:31:32 -06:00
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2015-02-01 00:56:53 -07:00
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static void vhost_scsi_done_inflight(struct kref *kref)
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2013-04-26 21:16:49 -06:00
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{
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struct vhost_scsi_inflight *inflight;
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inflight = container_of(kref, struct vhost_scsi_inflight, kref);
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complete(&inflight->comp);
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}
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2015-02-01 00:56:53 -07:00
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static void vhost_scsi_init_inflight(struct vhost_scsi *vs,
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2013-04-26 21:16:49 -06:00
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struct vhost_scsi_inflight *old_inflight[])
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{
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struct vhost_scsi_inflight *new_inflight;
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struct vhost_virtqueue *vq;
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int idx, i;
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for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {
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vq = &vs->vqs[i].vq;
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mutex_lock(&vq->mutex);
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/* store old infight */
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idx = vs->vqs[i].inflight_idx;
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if (old_inflight)
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old_inflight[i] = &vs->vqs[i].inflights[idx];
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/* setup new infight */
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vs->vqs[i].inflight_idx = idx ^ 1;
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new_inflight = &vs->vqs[i].inflights[idx ^ 1];
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kref_init(&new_inflight->kref);
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init_completion(&new_inflight->comp);
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mutex_unlock(&vq->mutex);
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}
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}
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static struct vhost_scsi_inflight *
|
2015-02-01 00:56:53 -07:00
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vhost_scsi_get_inflight(struct vhost_virtqueue *vq)
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2013-04-26 21:16:49 -06:00
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{
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struct vhost_scsi_inflight *inflight;
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|
|
struct vhost_scsi_virtqueue *svq;
|
|
|
|
|
|
|
|
svq = container_of(vq, struct vhost_scsi_virtqueue, vq);
|
|
|
|
inflight = &svq->inflights[svq->inflight_idx];
|
|
|
|
kref_get(&inflight->kref);
|
|
|
|
|
|
|
|
return inflight;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_put_inflight(struct vhost_scsi_inflight *inflight)
|
2013-04-26 21:16:49 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
kref_put(&inflight->kref, vhost_scsi_done_inflight);
|
2013-04-26 21:16:49 -06:00
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static int vhost_scsi_check_true(struct se_portal_group *se_tpg)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static int vhost_scsi_check_false(struct se_portal_group *se_tpg)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static char *vhost_scsi_get_fabric_wwn(struct se_portal_group *se_tpg)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tpg *tpg = container_of(se_tpg,
|
|
|
|
struct vhost_scsi_tpg, se_tpg);
|
|
|
|
struct vhost_scsi_tport *tport = tpg->tport;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
return &tport->tport_name[0];
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static u16 vhost_scsi_get_tpgt(struct se_portal_group *se_tpg)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tpg *tpg = container_of(se_tpg,
|
|
|
|
struct vhost_scsi_tpg, se_tpg);
|
2012-07-18 15:31:32 -06:00
|
|
|
return tpg->tport_tpgt;
|
|
|
|
}
|
|
|
|
|
2015-03-28 01:03:51 -06:00
|
|
|
static int vhost_scsi_check_prot_fabric_only(struct se_portal_group *se_tpg)
|
|
|
|
{
|
|
|
|
struct vhost_scsi_tpg *tpg = container_of(se_tpg,
|
|
|
|
struct vhost_scsi_tpg, se_tpg);
|
|
|
|
|
|
|
|
return tpg->tv_fabric_prot_type;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static u32 vhost_scsi_tpg_get_inst_index(struct se_portal_group *se_tpg)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_release_cmd(struct se_cmd *se_cmd)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_cmd *tv_cmd = container_of(se_cmd,
|
|
|
|
struct vhost_scsi_cmd, tvc_se_cmd);
|
2015-01-29 18:21:13 -07:00
|
|
|
struct se_session *se_sess = tv_cmd->tvc_nexus->tvn_se_sess;
|
2014-02-22 19:34:43 -07:00
|
|
|
int i;
|
2013-06-06 03:20:41 -06:00
|
|
|
|
|
|
|
if (tv_cmd->tvc_sgl_count) {
|
|
|
|
for (i = 0; i < tv_cmd->tvc_sgl_count; i++)
|
|
|
|
put_page(sg_page(&tv_cmd->tvc_sgl[i]));
|
2013-09-17 13:54:31 -06:00
|
|
|
}
|
2014-02-22 19:34:43 -07:00
|
|
|
if (tv_cmd->tvc_prot_sgl_count) {
|
|
|
|
for (i = 0; i < tv_cmd->tvc_prot_sgl_count; i++)
|
|
|
|
put_page(sg_page(&tv_cmd->tvc_prot_sgl[i]));
|
|
|
|
}
|
2013-06-06 03:20:41 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_put_inflight(tv_cmd->inflight);
|
2018-06-12 13:05:43 -06:00
|
|
|
target_free_tag(se_sess, se_cmd);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static u32 vhost_scsi_sess_get_index(struct se_session *se_sess)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static int vhost_scsi_write_pending(struct se_cmd *se_cmd)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
/* Go ahead and process the write immediately */
|
|
|
|
target_execute_cmd(se_cmd);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static int vhost_scsi_write_pending_status(struct se_cmd *se_cmd)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_set_default_node_attrs(struct se_node_acl *nacl)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static int vhost_scsi_get_cmd_state(struct se_cmd *se_cmd)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_complete_cmd(struct vhost_scsi_cmd *cmd)
|
2012-07-30 14:30:00 -06:00
|
|
|
{
|
2013-05-06 02:38:29 -06:00
|
|
|
struct vhost_scsi *vs = cmd->tvc_vhost;
|
2012-07-30 14:30:00 -06:00
|
|
|
|
2013-05-06 02:38:29 -06:00
|
|
|
llist_add(&cmd->tvc_completion_list, &vs->vs_completion_list);
|
2012-07-30 14:30:00 -06:00
|
|
|
|
|
|
|
vhost_work_queue(&vs->dev, &vs->vs_completion_work);
|
|
|
|
}
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static int vhost_scsi_queue_data_in(struct se_cmd *se_cmd)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_cmd *cmd = container_of(se_cmd,
|
|
|
|
struct vhost_scsi_cmd, tvc_se_cmd);
|
2013-05-06 02:38:29 -06:00
|
|
|
vhost_scsi_complete_cmd(cmd);
|
2012-07-18 15:31:32 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static int vhost_scsi_queue_status(struct se_cmd *se_cmd)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_cmd *cmd = container_of(se_cmd,
|
|
|
|
struct vhost_scsi_cmd, tvc_se_cmd);
|
2013-05-06 02:38:29 -06:00
|
|
|
vhost_scsi_complete_cmd(cmd);
|
2012-07-18 15:31:32 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_queue_tm_rsp(struct se_cmd *se_cmd)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2013-07-03 09:22:17 -06:00
|
|
|
return;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_aborted_task(struct se_cmd *se_cmd)
|
2014-03-22 15:55:56 -06:00
|
|
|
{
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_free_evt(struct vhost_scsi *vs, struct vhost_scsi_evt *evt)
|
2013-04-25 01:35:21 -06:00
|
|
|
{
|
|
|
|
vs->vs_events_nr--;
|
|
|
|
kfree(evt);
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static struct vhost_scsi_evt *
|
|
|
|
vhost_scsi_allocate_evt(struct vhost_scsi *vs,
|
2013-05-06 02:38:27 -06:00
|
|
|
u32 event, u32 reason)
|
2013-04-25 01:35:21 -06:00
|
|
|
{
|
2013-04-26 21:16:48 -06:00
|
|
|
struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_evt *evt;
|
2013-04-25 01:35:21 -06:00
|
|
|
|
|
|
|
if (vs->vs_events_nr > VHOST_SCSI_MAX_EVENT) {
|
|
|
|
vs->vs_events_missed = true;
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
evt = kzalloc(sizeof(*evt), GFP_KERNEL);
|
|
|
|
if (!evt) {
|
2015-02-01 00:56:53 -07:00
|
|
|
vq_err(vq, "Failed to allocate vhost_scsi_evt\n");
|
2013-04-25 01:35:21 -06:00
|
|
|
vs->vs_events_missed = true;
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2014-11-23 09:01:34 -07:00
|
|
|
evt->event.event = cpu_to_vhost32(vq, event);
|
|
|
|
evt->event.reason = cpu_to_vhost32(vq, reason);
|
2013-04-25 01:35:21 -06:00
|
|
|
vs->vs_events_nr++;
|
|
|
|
|
|
|
|
return evt;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_free_cmd(struct vhost_scsi_cmd *cmd)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2013-05-06 02:38:29 -06:00
|
|
|
struct se_cmd *se_cmd = &cmd->tvc_se_cmd;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
/* TODO locking against target/backend threads? */
|
2013-06-06 02:44:48 -06:00
|
|
|
transport_generic_free_cmd(se_cmd, 0);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2013-06-06 03:20:41 -06:00
|
|
|
}
|
2013-04-26 21:16:49 -06:00
|
|
|
|
2013-06-06 03:20:41 -06:00
|
|
|
static int vhost_scsi_check_stop_free(struct se_cmd *se_cmd)
|
|
|
|
{
|
2015-04-27 05:52:36 -06:00
|
|
|
return target_put_sess_cmd(se_cmd);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static void
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_do_evt_work(struct vhost_scsi *vs, struct vhost_scsi_evt *evt)
|
2013-04-25 01:35:21 -06:00
|
|
|
{
|
2013-04-26 21:16:48 -06:00
|
|
|
struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
|
2013-04-25 01:35:21 -06:00
|
|
|
struct virtio_scsi_event *event = &evt->event;
|
|
|
|
struct virtio_scsi_event __user *eventp;
|
|
|
|
unsigned out, in;
|
|
|
|
int head, ret;
|
|
|
|
|
|
|
|
if (!vq->private_data) {
|
|
|
|
vs->vs_events_missed = true;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
again:
|
|
|
|
vhost_disable_notify(&vs->dev, vq);
|
2014-06-05 06:20:27 -06:00
|
|
|
head = vhost_get_vq_desc(vq, vq->iov,
|
2013-04-25 01:35:21 -06:00
|
|
|
ARRAY_SIZE(vq->iov), &out, &in,
|
|
|
|
NULL, NULL);
|
|
|
|
if (head < 0) {
|
|
|
|
vs->vs_events_missed = true;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (head == vq->num) {
|
|
|
|
if (vhost_enable_notify(&vs->dev, vq))
|
|
|
|
goto again;
|
|
|
|
vs->vs_events_missed = true;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((vq->iov[out].iov_len != sizeof(struct virtio_scsi_event))) {
|
|
|
|
vq_err(vq, "Expecting virtio_scsi_event, got %zu bytes\n",
|
|
|
|
vq->iov[out].iov_len);
|
|
|
|
vs->vs_events_missed = true;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (vs->vs_events_missed) {
|
2014-11-23 09:01:34 -07:00
|
|
|
event->event |= cpu_to_vhost32(vq, VIRTIO_SCSI_T_EVENTS_MISSED);
|
2013-04-25 01:35:21 -06:00
|
|
|
vs->vs_events_missed = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
eventp = vq->iov[out].iov_base;
|
|
|
|
ret = __copy_to_user(eventp, event, sizeof(*event));
|
|
|
|
if (!ret)
|
|
|
|
vhost_add_used_and_signal(&vs->dev, vq, head, 0);
|
|
|
|
else
|
2015-02-01 00:56:53 -07:00
|
|
|
vq_err(vq, "Faulted on vhost_scsi_send_event\n");
|
2013-04-25 01:35:21 -06:00
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_evt_work(struct vhost_work *work)
|
2013-04-25 01:35:21 -06:00
|
|
|
{
|
|
|
|
struct vhost_scsi *vs = container_of(work, struct vhost_scsi,
|
|
|
|
vs_event_work);
|
2013-04-26 21:16:48 -06:00
|
|
|
struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
|
2017-05-11 18:42:56 -06:00
|
|
|
struct vhost_scsi_evt *evt, *t;
|
2013-04-25 01:35:21 -06:00
|
|
|
struct llist_node *llnode;
|
|
|
|
|
|
|
|
mutex_lock(&vq->mutex);
|
|
|
|
llnode = llist_del_all(&vs->vs_event_list);
|
2017-05-11 18:42:56 -06:00
|
|
|
llist_for_each_entry_safe(evt, t, llnode, list) {
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_do_evt_work(vs, evt);
|
|
|
|
vhost_scsi_free_evt(vs, evt);
|
2013-04-25 01:35:21 -06:00
|
|
|
}
|
|
|
|
mutex_unlock(&vq->mutex);
|
|
|
|
}
|
|
|
|
|
2012-07-18 15:31:32 -06:00
|
|
|
/* Fill in status and signal that we are done processing this command
|
|
|
|
*
|
|
|
|
* This is scheduled in the vhost work queue so we are called with the owner
|
|
|
|
* process mm and can access the vring.
|
|
|
|
*/
|
|
|
|
static void vhost_scsi_complete_cmd_work(struct vhost_work *work)
|
|
|
|
{
|
|
|
|
struct vhost_scsi *vs = container_of(work, struct vhost_scsi,
|
|
|
|
vs_completion_work);
|
tcm_vhost: Multi-queue support
This adds virtio-scsi multi-queue support to tcm_vhost. In order to use
multi-queue, guest side multi-queue support is need. It can
be found here:
https://lkml.org/lkml/2012/12/18/166
Currently, only one thread is created by vhost core code for each
vhost_scsi instance. Even if there are multi-queues, all the handling of
guest kick (vhost_scsi_handle_kick) are processed in one thread. This is
not optimal. Luckily, most of the work is offloaded to the tcm_vhost
workqueue.
Some initial perf numbers:
1 queue, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 127K/127k IOPS
4 queues, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 181K/181k IOPS
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-02-05 22:20:59 -07:00
|
|
|
DECLARE_BITMAP(signal, VHOST_SCSI_MAX_VQ);
|
2013-01-05 23:36:13 -07:00
|
|
|
struct virtio_scsi_cmd_resp v_rsp;
|
2017-11-08 17:00:21 -07:00
|
|
|
struct vhost_scsi_cmd *cmd, *t;
|
2013-01-05 23:36:13 -07:00
|
|
|
struct llist_node *llnode;
|
|
|
|
struct se_cmd *se_cmd;
|
2015-01-27 14:13:12 -07:00
|
|
|
struct iov_iter iov_iter;
|
tcm_vhost: Multi-queue support
This adds virtio-scsi multi-queue support to tcm_vhost. In order to use
multi-queue, guest side multi-queue support is need. It can
be found here:
https://lkml.org/lkml/2012/12/18/166
Currently, only one thread is created by vhost core code for each
vhost_scsi instance. Even if there are multi-queues, all the handling of
guest kick (vhost_scsi_handle_kick) are processed in one thread. This is
not optimal. Luckily, most of the work is offloaded to the tcm_vhost
workqueue.
Some initial perf numbers:
1 queue, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 127K/127k IOPS
4 queues, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 181K/181k IOPS
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-02-05 22:20:59 -07:00
|
|
|
int ret, vq;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
tcm_vhost: Multi-queue support
This adds virtio-scsi multi-queue support to tcm_vhost. In order to use
multi-queue, guest side multi-queue support is need. It can
be found here:
https://lkml.org/lkml/2012/12/18/166
Currently, only one thread is created by vhost core code for each
vhost_scsi instance. Even if there are multi-queues, all the handling of
guest kick (vhost_scsi_handle_kick) are processed in one thread. This is
not optimal. Luckily, most of the work is offloaded to the tcm_vhost
workqueue.
Some initial perf numbers:
1 queue, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 127K/127k IOPS
4 queues, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 181K/181k IOPS
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-02-05 22:20:59 -07:00
|
|
|
bitmap_zero(signal, VHOST_SCSI_MAX_VQ);
|
2013-01-05 23:36:13 -07:00
|
|
|
llnode = llist_del_all(&vs->vs_completion_list);
|
2017-11-08 17:00:21 -07:00
|
|
|
llist_for_each_entry_safe(cmd, t, llnode, tvc_completion_list) {
|
2013-05-06 02:38:29 -06:00
|
|
|
se_cmd = &cmd->tvc_se_cmd;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
pr_debug("%s tv_cmd %p resid %u status %#02x\n", __func__,
|
2013-05-06 02:38:29 -06:00
|
|
|
cmd, se_cmd->residual_count, se_cmd->scsi_status);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
memset(&v_rsp, 0, sizeof(v_rsp));
|
2014-11-23 09:01:34 -07:00
|
|
|
v_rsp.resid = cpu_to_vhost32(cmd->tvc_vq, se_cmd->residual_count);
|
2012-07-18 15:31:32 -06:00
|
|
|
/* TODO is status_qualifier field needed? */
|
|
|
|
v_rsp.status = se_cmd->scsi_status;
|
2014-11-23 09:01:34 -07:00
|
|
|
v_rsp.sense_len = cpu_to_vhost32(cmd->tvc_vq,
|
|
|
|
se_cmd->scsi_sense_length);
|
2013-05-06 02:38:29 -06:00
|
|
|
memcpy(v_rsp.sense, cmd->tvc_sense_buf,
|
2014-11-23 09:01:34 -07:00
|
|
|
se_cmd->scsi_sense_length);
|
2015-01-27 14:13:12 -07:00
|
|
|
|
2016-06-06 16:07:59 -06:00
|
|
|
iov_iter_init(&iov_iter, READ, &cmd->tvc_resp_iov,
|
2015-01-27 14:13:12 -07:00
|
|
|
cmd->tvc_in_iovs, sizeof(v_rsp));
|
|
|
|
ret = copy_to_iter(&v_rsp, sizeof(v_rsp), &iov_iter);
|
|
|
|
if (likely(ret == sizeof(v_rsp))) {
|
2013-04-26 21:16:48 -06:00
|
|
|
struct vhost_scsi_virtqueue *q;
|
2013-05-06 02:38:29 -06:00
|
|
|
vhost_add_used(cmd->tvc_vq, cmd->tvc_vq_desc, 0);
|
|
|
|
q = container_of(cmd->tvc_vq, struct vhost_scsi_virtqueue, vq);
|
2013-04-26 21:16:48 -06:00
|
|
|
vq = q - vs->vqs;
|
tcm_vhost: Multi-queue support
This adds virtio-scsi multi-queue support to tcm_vhost. In order to use
multi-queue, guest side multi-queue support is need. It can
be found here:
https://lkml.org/lkml/2012/12/18/166
Currently, only one thread is created by vhost core code for each
vhost_scsi instance. Even if there are multi-queues, all the handling of
guest kick (vhost_scsi_handle_kick) are processed in one thread. This is
not optimal. Luckily, most of the work is offloaded to the tcm_vhost
workqueue.
Some initial perf numbers:
1 queue, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 127K/127k IOPS
4 queues, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 181K/181k IOPS
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-02-05 22:20:59 -07:00
|
|
|
__set_bit(vq, signal);
|
|
|
|
} else
|
2012-07-18 15:31:32 -06:00
|
|
|
pr_err("Faulted on virtio_scsi_cmd_resp\n");
|
|
|
|
|
2013-05-06 02:38:29 -06:00
|
|
|
vhost_scsi_free_cmd(cmd);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
tcm_vhost: Multi-queue support
This adds virtio-scsi multi-queue support to tcm_vhost. In order to use
multi-queue, guest side multi-queue support is need. It can
be found here:
https://lkml.org/lkml/2012/12/18/166
Currently, only one thread is created by vhost core code for each
vhost_scsi instance. Even if there are multi-queues, all the handling of
guest kick (vhost_scsi_handle_kick) are processed in one thread. This is
not optimal. Luckily, most of the work is offloaded to the tcm_vhost
workqueue.
Some initial perf numbers:
1 queue, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 127K/127k IOPS
4 queues, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 181K/181k IOPS
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-02-05 22:20:59 -07:00
|
|
|
vq = -1;
|
|
|
|
while ((vq = find_next_bit(signal, VHOST_SCSI_MAX_VQ, vq + 1))
|
|
|
|
< VHOST_SCSI_MAX_VQ)
|
2013-04-26 21:16:48 -06:00
|
|
|
vhost_signal(&vs->dev, &vs->vqs[vq].vq);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static struct vhost_scsi_cmd *
|
|
|
|
vhost_scsi_get_tag(struct vhost_virtqueue *vq, struct vhost_scsi_tpg *tpg,
|
2014-02-22 19:22:31 -07:00
|
|
|
unsigned char *cdb, u64 scsi_tag, u16 lun, u8 task_attr,
|
|
|
|
u32 exp_data_len, int data_direction)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_cmd *cmd;
|
|
|
|
struct vhost_scsi_nexus *tv_nexus;
|
2013-06-07 18:47:46 -06:00
|
|
|
struct se_session *se_sess;
|
2014-02-22 19:08:24 -07:00
|
|
|
struct scatterlist *sg, *prot_sg;
|
2013-06-21 15:32:04 -06:00
|
|
|
struct page **pages;
|
2018-06-12 13:05:44 -06:00
|
|
|
int tag, cpu;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2013-05-06 02:38:28 -06:00
|
|
|
tv_nexus = tpg->tpg_nexus;
|
2012-07-18 15:31:32 -06:00
|
|
|
if (!tv_nexus) {
|
2015-02-01 00:56:53 -07:00
|
|
|
pr_err("Unable to locate active struct vhost_scsi_nexus\n");
|
2012-07-18 15:31:32 -06:00
|
|
|
return ERR_PTR(-EIO);
|
|
|
|
}
|
2013-06-07 18:47:46 -06:00
|
|
|
se_sess = tv_nexus->tvn_se_sess;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2018-06-12 13:05:44 -06:00
|
|
|
tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
|
2013-09-23 12:42:28 -06:00
|
|
|
if (tag < 0) {
|
2015-02-01 00:56:53 -07:00
|
|
|
pr_err("Unable to obtain tag for vhost_scsi_cmd\n");
|
2013-09-23 12:42:28 -06:00
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[tag];
|
2013-06-21 15:32:04 -06:00
|
|
|
sg = cmd->tvc_sgl;
|
2014-02-22 19:08:24 -07:00
|
|
|
prot_sg = cmd->tvc_prot_sgl;
|
2013-06-21 15:32:04 -06:00
|
|
|
pages = cmd->tvc_upages;
|
2017-05-20 05:48:44 -06:00
|
|
|
memset(cmd, 0, sizeof(*cmd));
|
2013-06-21 15:32:04 -06:00
|
|
|
cmd->tvc_sgl = sg;
|
2014-02-22 19:08:24 -07:00
|
|
|
cmd->tvc_prot_sgl = prot_sg;
|
2013-06-21 15:32:04 -06:00
|
|
|
cmd->tvc_upages = pages;
|
2013-06-07 18:47:46 -06:00
|
|
|
cmd->tvc_se_cmd.map_tag = tag;
|
2018-06-12 13:05:44 -06:00
|
|
|
cmd->tvc_se_cmd.map_cpu = cpu;
|
2014-02-22 19:22:31 -07:00
|
|
|
cmd->tvc_tag = scsi_tag;
|
|
|
|
cmd->tvc_lun = lun;
|
|
|
|
cmd->tvc_task_attr = task_attr;
|
2013-05-06 02:38:29 -06:00
|
|
|
cmd->tvc_exp_data_len = exp_data_len;
|
|
|
|
cmd->tvc_data_direction = data_direction;
|
|
|
|
cmd->tvc_nexus = tv_nexus;
|
2015-02-01 00:56:53 -07:00
|
|
|
cmd->inflight = vhost_scsi_get_inflight(vq);
|
2013-05-06 02:38:29 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
memcpy(cmd->tvc_cdb, cdb, VHOST_SCSI_MAX_CDB_SIZE);
|
2014-02-22 19:22:31 -07:00
|
|
|
|
2013-05-06 02:38:29 -06:00
|
|
|
return cmd;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Map a user memory range into a scatterlist
|
|
|
|
*
|
|
|
|
* Returns the number of scatterlist entries used or -errno on error.
|
|
|
|
*/
|
2013-05-06 02:38:27 -06:00
|
|
|
static int
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_map_to_sgl(struct vhost_scsi_cmd *cmd,
|
2017-09-24 20:07:59 -06:00
|
|
|
struct iov_iter *iter,
|
2013-06-21 15:32:04 -06:00
|
|
|
struct scatterlist *sgl,
|
2014-02-22 19:34:08 -07:00
|
|
|
bool write)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-01-28 14:10:51 -07:00
|
|
|
struct page **pages = cmd->tvc_upages;
|
2017-09-24 20:07:59 -06:00
|
|
|
struct scatterlist *sg = sgl;
|
|
|
|
ssize_t bytes;
|
|
|
|
size_t offset;
|
|
|
|
unsigned int npages = 0;
|
2013-06-21 15:32:04 -06:00
|
|
|
|
2017-09-24 20:07:59 -06:00
|
|
|
bytes = iov_iter_get_pages(iter, pages, LONG_MAX,
|
|
|
|
VHOST_SCSI_PREALLOC_UPAGES, &offset);
|
2013-01-21 20:20:27 -07:00
|
|
|
/* No pages were pinned */
|
2017-09-24 20:07:59 -06:00
|
|
|
if (bytes <= 0)
|
|
|
|
return bytes < 0 ? bytes : -EFAULT;
|
2013-01-21 20:20:27 -07:00
|
|
|
|
2017-09-24 20:07:59 -06:00
|
|
|
iov_iter_advance(iter, bytes);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2017-09-24 20:07:59 -06:00
|
|
|
while (bytes) {
|
|
|
|
unsigned n = min_t(unsigned, PAGE_SIZE - offset, bytes);
|
|
|
|
sg_set_page(sg++, pages[npages++], n, offset);
|
|
|
|
bytes -= n;
|
|
|
|
offset = 0;
|
|
|
|
}
|
|
|
|
return npages;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static int
|
2015-01-28 01:15:00 -07:00
|
|
|
vhost_scsi_calc_sgls(struct iov_iter *iter, size_t bytes, int max_sgls)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-01-28 01:15:00 -07:00
|
|
|
int sgl_count = 0;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-01-28 01:15:00 -07:00
|
|
|
if (!iter || !iter->iov) {
|
|
|
|
pr_err("%s: iter->iov is NULL, but expected bytes: %zu"
|
|
|
|
" present\n", __func__, bytes);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
2013-01-21 20:20:26 -07:00
|
|
|
|
2015-01-28 01:15:00 -07:00
|
|
|
sgl_count = iov_iter_npages(iter, 0xffff);
|
|
|
|
if (sgl_count > max_sgls) {
|
|
|
|
pr_err("%s: requested sgl_count: %d exceeds pre-allocated"
|
|
|
|
" max_sgls: %d\n", __func__, sgl_count, max_sgls);
|
|
|
|
return -EINVAL;
|
2014-02-22 19:34:08 -07:00
|
|
|
}
|
2015-01-28 01:15:00 -07:00
|
|
|
return sgl_count;
|
|
|
|
}
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-01-28 01:15:00 -07:00
|
|
|
static int
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_iov_to_sgl(struct vhost_scsi_cmd *cmd, bool write,
|
|
|
|
struct iov_iter *iter,
|
|
|
|
struct scatterlist *sg, int sg_count)
|
2015-01-28 01:15:00 -07:00
|
|
|
{
|
2017-09-24 16:36:44 -06:00
|
|
|
struct scatterlist *p = sg;
|
2017-09-24 20:07:59 -06:00
|
|
|
int ret;
|
2014-02-22 19:34:08 -07:00
|
|
|
|
2017-09-24 20:07:59 -06:00
|
|
|
while (iov_iter_count(iter)) {
|
|
|
|
ret = vhost_scsi_map_to_sgl(cmd, iter, sg, write);
|
2012-07-18 15:31:32 -06:00
|
|
|
if (ret < 0) {
|
2017-09-24 16:36:44 -06:00
|
|
|
while (p < sg) {
|
|
|
|
struct page *page = sg_page(p++);
|
2015-01-28 01:15:00 -07:00
|
|
|
if (page)
|
|
|
|
put_page(page);
|
|
|
|
}
|
2012-07-18 15:31:32 -06:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
sg += ret;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-02-22 19:34:43 -07:00
|
|
|
static int
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_mapal(struct vhost_scsi_cmd *cmd,
|
2015-01-28 01:15:00 -07:00
|
|
|
size_t prot_bytes, struct iov_iter *prot_iter,
|
|
|
|
size_t data_bytes, struct iov_iter *data_iter)
|
|
|
|
{
|
|
|
|
int sgl_count, ret;
|
|
|
|
bool write = (cmd->tvc_data_direction == DMA_FROM_DEVICE);
|
|
|
|
|
|
|
|
if (prot_bytes) {
|
|
|
|
sgl_count = vhost_scsi_calc_sgls(prot_iter, prot_bytes,
|
2015-02-01 00:56:53 -07:00
|
|
|
VHOST_SCSI_PREALLOC_PROT_SGLS);
|
2015-01-28 01:15:00 -07:00
|
|
|
if (sgl_count < 0)
|
|
|
|
return sgl_count;
|
|
|
|
|
|
|
|
sg_init_table(cmd->tvc_prot_sgl, sgl_count);
|
|
|
|
cmd->tvc_prot_sgl_count = sgl_count;
|
|
|
|
pr_debug("%s prot_sg %p prot_sgl_count %u\n", __func__,
|
|
|
|
cmd->tvc_prot_sgl, cmd->tvc_prot_sgl_count);
|
|
|
|
|
|
|
|
ret = vhost_scsi_iov_to_sgl(cmd, write, prot_iter,
|
|
|
|
cmd->tvc_prot_sgl,
|
|
|
|
cmd->tvc_prot_sgl_count);
|
2014-02-22 19:34:43 -07:00
|
|
|
if (ret < 0) {
|
|
|
|
cmd->tvc_prot_sgl_count = 0;
|
|
|
|
return ret;
|
|
|
|
}
|
2015-01-28 01:15:00 -07:00
|
|
|
}
|
|
|
|
sgl_count = vhost_scsi_calc_sgls(data_iter, data_bytes,
|
2015-02-01 00:56:53 -07:00
|
|
|
VHOST_SCSI_PREALLOC_SGLS);
|
2015-01-28 01:15:00 -07:00
|
|
|
if (sgl_count < 0)
|
|
|
|
return sgl_count;
|
|
|
|
|
|
|
|
sg_init_table(cmd->tvc_sgl, sgl_count);
|
|
|
|
cmd->tvc_sgl_count = sgl_count;
|
|
|
|
pr_debug("%s data_sg %p data_sgl_count %u\n", __func__,
|
|
|
|
cmd->tvc_sgl, cmd->tvc_sgl_count);
|
|
|
|
|
|
|
|
ret = vhost_scsi_iov_to_sgl(cmd, write, data_iter,
|
|
|
|
cmd->tvc_sgl, cmd->tvc_sgl_count);
|
|
|
|
if (ret < 0) {
|
|
|
|
cmd->tvc_sgl_count = 0;
|
|
|
|
return ret;
|
2014-02-22 19:34:43 -07:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-12-21 11:42:08 -07:00
|
|
|
static int vhost_scsi_to_tcm_attr(int attr)
|
|
|
|
{
|
|
|
|
switch (attr) {
|
|
|
|
case VIRTIO_SCSI_S_SIMPLE:
|
|
|
|
return TCM_SIMPLE_TAG;
|
|
|
|
case VIRTIO_SCSI_S_ORDERED:
|
|
|
|
return TCM_ORDERED_TAG;
|
|
|
|
case VIRTIO_SCSI_S_HEAD:
|
|
|
|
return TCM_HEAD_TAG;
|
|
|
|
case VIRTIO_SCSI_S_ACA:
|
|
|
|
return TCM_ACA_TAG;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return TCM_SIMPLE_TAG;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_submission_work(struct work_struct *work)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_cmd *cmd =
|
|
|
|
container_of(work, struct vhost_scsi_cmd, work);
|
|
|
|
struct vhost_scsi_nexus *tv_nexus;
|
2013-05-06 02:38:29 -06:00
|
|
|
struct se_cmd *se_cmd = &cmd->tvc_se_cmd;
|
2014-02-22 19:22:31 -07:00
|
|
|
struct scatterlist *sg_ptr, *sg_prot_ptr = NULL;
|
|
|
|
int rc;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2014-02-22 19:22:31 -07:00
|
|
|
/* FIXME: BIDI operation */
|
2013-05-06 02:38:29 -06:00
|
|
|
if (cmd->tvc_sgl_count) {
|
|
|
|
sg_ptr = cmd->tvc_sgl;
|
2014-02-22 19:22:31 -07:00
|
|
|
|
|
|
|
if (cmd->tvc_prot_sgl_count)
|
|
|
|
sg_prot_ptr = cmd->tvc_prot_sgl;
|
|
|
|
else
|
|
|
|
se_cmd->prot_pto = true;
|
2012-07-18 15:31:32 -06:00
|
|
|
} else {
|
|
|
|
sg_ptr = NULL;
|
|
|
|
}
|
2013-05-06 02:38:29 -06:00
|
|
|
tv_nexus = cmd->tvc_nexus;
|
2012-10-01 19:40:55 -06:00
|
|
|
|
2015-04-14 05:26:44 -06:00
|
|
|
se_cmd->tag = 0;
|
2012-10-01 19:40:55 -06:00
|
|
|
rc = target_submit_cmd_map_sgls(se_cmd, tv_nexus->tvn_se_sess,
|
2013-05-06 02:38:29 -06:00
|
|
|
cmd->tvc_cdb, &cmd->tvc_sense_buf[0],
|
|
|
|
cmd->tvc_lun, cmd->tvc_exp_data_len,
|
2014-12-21 11:42:08 -07:00
|
|
|
vhost_scsi_to_tcm_attr(cmd->tvc_task_attr),
|
|
|
|
cmd->tvc_data_direction, TARGET_SCF_ACK_KREF,
|
|
|
|
sg_ptr, cmd->tvc_sgl_count, NULL, 0, sg_prot_ptr,
|
|
|
|
cmd->tvc_prot_sgl_count);
|
2012-07-18 15:31:32 -06:00
|
|
|
if (rc < 0) {
|
|
|
|
transport_send_check_condition_and_sense(se_cmd,
|
2012-10-01 19:40:55 -06:00
|
|
|
TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
|
2012-07-18 15:31:32 -06:00
|
|
|
transport_generic_free_cmd(se_cmd, 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static void
|
|
|
|
vhost_scsi_send_bad_target(struct vhost_scsi *vs,
|
|
|
|
struct vhost_virtqueue *vq,
|
|
|
|
int head, unsigned out)
|
2013-04-10 01:06:15 -06:00
|
|
|
{
|
|
|
|
struct virtio_scsi_cmd_resp __user *resp;
|
|
|
|
struct virtio_scsi_cmd_resp rsp;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
memset(&rsp, 0, sizeof(rsp));
|
|
|
|
rsp.response = VIRTIO_SCSI_S_BAD_TARGET;
|
|
|
|
resp = vq->iov[out].iov_base;
|
|
|
|
ret = __copy_to_user(resp, &rsp, sizeof(rsp));
|
|
|
|
if (!ret)
|
|
|
|
vhost_add_used_and_signal(&vs->dev, vq, head, 0);
|
|
|
|
else
|
|
|
|
pr_err("Faulted on virtio_scsi_cmd_resp\n");
|
|
|
|
}
|
|
|
|
|
2018-09-17 18:09:49 -06:00
|
|
|
static int
|
|
|
|
vhost_scsi_get_desc(struct vhost_scsi *vs, struct vhost_virtqueue *vq,
|
|
|
|
struct vhost_scsi_ctx *vc)
|
|
|
|
{
|
|
|
|
int ret = -ENXIO;
|
|
|
|
|
|
|
|
vc->head = vhost_get_vq_desc(vq, vq->iov,
|
|
|
|
ARRAY_SIZE(vq->iov), &vc->out, &vc->in,
|
|
|
|
NULL, NULL);
|
|
|
|
|
|
|
|
pr_debug("vhost_get_vq_desc: head: %d, out: %u in: %u\n",
|
|
|
|
vc->head, vc->out, vc->in);
|
|
|
|
|
|
|
|
/* On error, stop handling until the next kick. */
|
|
|
|
if (unlikely(vc->head < 0))
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
/* Nothing new? Wait for eventfd to tell us they refilled. */
|
|
|
|
if (vc->head == vq->num) {
|
|
|
|
if (unlikely(vhost_enable_notify(&vs->dev, vq))) {
|
|
|
|
vhost_disable_notify(&vs->dev, vq);
|
|
|
|
ret = -EAGAIN;
|
|
|
|
}
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get the size of request and response buffers.
|
|
|
|
* FIXME: Not correct for BIDI operation
|
|
|
|
*/
|
|
|
|
vc->out_size = iov_length(vq->iov, vc->out);
|
|
|
|
vc->in_size = iov_length(&vq->iov[vc->out], vc->in);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Copy over the virtio-scsi request header, which for a
|
|
|
|
* ANY_LAYOUT enabled guest may span multiple iovecs, or a
|
|
|
|
* single iovec may contain both the header + outgoing
|
|
|
|
* WRITE payloads.
|
|
|
|
*
|
|
|
|
* copy_from_iter() will advance out_iter, so that it will
|
|
|
|
* point at the start of the outgoing WRITE payload, if
|
|
|
|
* DMA_TO_DEVICE is set.
|
|
|
|
*/
|
|
|
|
iov_iter_init(&vc->out_iter, WRITE, vq->iov, vc->out, vc->out_size);
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
done:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
vhost_scsi_chk_size(struct vhost_virtqueue *vq, struct vhost_scsi_ctx *vc)
|
|
|
|
{
|
|
|
|
if (unlikely(vc->in_size < vc->rsp_size)) {
|
|
|
|
vq_err(vq,
|
|
|
|
"Response buf too small, need min %zu bytes got %zu",
|
|
|
|
vc->rsp_size, vc->in_size);
|
|
|
|
return -EINVAL;
|
|
|
|
} else if (unlikely(vc->out_size < vc->req_size)) {
|
|
|
|
vq_err(vq,
|
|
|
|
"Request buf too small, need min %zu bytes got %zu",
|
|
|
|
vc->req_size, vc->out_size);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
vhost_scsi_get_req(struct vhost_virtqueue *vq, struct vhost_scsi_ctx *vc,
|
|
|
|
struct vhost_scsi_tpg **tpgp)
|
|
|
|
{
|
|
|
|
int ret = -EIO;
|
|
|
|
|
|
|
|
if (unlikely(!copy_from_iter_full(vc->req, vc->req_size,
|
|
|
|
&vc->out_iter))) {
|
2018-12-12 18:10:14 -07:00
|
|
|
vq_err(vq, "Faulted on copy_from_iter_full\n");
|
2018-09-17 18:09:49 -06:00
|
|
|
} else if (unlikely(*vc->lunp != 1)) {
|
|
|
|
/* virtio-scsi spec requires byte 0 of the lun to be 1 */
|
|
|
|
vq_err(vq, "Illegal virtio-scsi lun: %u\n", *vc->lunp);
|
|
|
|
} else {
|
|
|
|
struct vhost_scsi_tpg **vs_tpg, *tpg;
|
|
|
|
|
|
|
|
vs_tpg = vq->private_data; /* validated at handler entry */
|
|
|
|
|
|
|
|
tpg = READ_ONCE(vs_tpg[*vc->target]);
|
|
|
|
if (unlikely(!tpg)) {
|
|
|
|
vq_err(vq, "Target 0x%x does not exist\n", *vc->target);
|
|
|
|
} else {
|
|
|
|
if (tpgp)
|
|
|
|
*tpgp = tpg;
|
|
|
|
ret = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static void
|
|
|
|
vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tpg **vs_tpg, *tpg;
|
2012-07-18 15:31:32 -06:00
|
|
|
struct virtio_scsi_cmd_req v_req;
|
2014-02-22 19:22:31 -07:00
|
|
|
struct virtio_scsi_cmd_req_pi v_req_pi;
|
2018-09-17 18:09:49 -06:00
|
|
|
struct vhost_scsi_ctx vc;
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_cmd *cmd;
|
2018-09-17 18:09:49 -06:00
|
|
|
struct iov_iter in_iter, prot_iter, data_iter;
|
2014-02-22 19:22:31 -07:00
|
|
|
u64 tag;
|
2015-01-25 22:14:58 -07:00
|
|
|
u32 exp_data_len, data_direction;
|
2018-09-17 18:09:49 -06:00
|
|
|
int ret, prot_bytes;
|
2014-02-22 19:22:31 -07:00
|
|
|
u16 lun;
|
2018-09-17 18:09:49 -06:00
|
|
|
u8 task_attr;
|
2015-01-25 22:14:58 -07:00
|
|
|
bool t10_pi = vhost_has_feature(vq, VIRTIO_SCSI_F_T10_PI);
|
2018-09-17 18:09:49 -06:00
|
|
|
void *cdb;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2013-05-07 00:54:35 -06:00
|
|
|
mutex_lock(&vq->mutex);
|
2013-04-03 00:17:37 -06:00
|
|
|
/*
|
|
|
|
* We can handle the vq only after the endpoint is setup by calling the
|
|
|
|
* VHOST_SCSI_SET_ENDPOINT ioctl.
|
|
|
|
*/
|
2013-05-07 00:54:35 -06:00
|
|
|
vs_tpg = vq->private_data;
|
2013-04-03 00:17:37 -06:00
|
|
|
if (!vs_tpg)
|
2013-05-07 00:54:35 -06:00
|
|
|
goto out;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2018-09-17 18:09:49 -06:00
|
|
|
memset(&vc, 0, sizeof(vc));
|
|
|
|
vc.rsp_size = sizeof(struct virtio_scsi_cmd_resp);
|
|
|
|
|
2012-07-18 15:31:32 -06:00
|
|
|
vhost_disable_notify(&vs->dev, vq);
|
|
|
|
|
|
|
|
for (;;) {
|
2018-09-17 18:09:49 -06:00
|
|
|
ret = vhost_scsi_get_desc(vs, vq, &vc);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
|
|
|
|
2015-01-25 22:14:58 -07:00
|
|
|
/*
|
|
|
|
* Setup pointers and values based upon different virtio-scsi
|
|
|
|
* request header if T10_PI is enabled in KVM guest.
|
|
|
|
*/
|
|
|
|
if (t10_pi) {
|
2018-09-17 18:09:49 -06:00
|
|
|
vc.req = &v_req_pi;
|
|
|
|
vc.req_size = sizeof(v_req_pi);
|
|
|
|
vc.lunp = &v_req_pi.lun[0];
|
|
|
|
vc.target = &v_req_pi.lun[1];
|
2014-02-22 19:22:31 -07:00
|
|
|
} else {
|
2018-09-17 18:09:49 -06:00
|
|
|
vc.req = &v_req;
|
|
|
|
vc.req_size = sizeof(v_req);
|
|
|
|
vc.lunp = &v_req.lun[0];
|
|
|
|
vc.target = &v_req.lun[1];
|
2014-02-22 19:22:31 -07:00
|
|
|
}
|
|
|
|
|
2015-01-25 22:14:58 -07:00
|
|
|
/*
|
2018-09-17 18:09:49 -06:00
|
|
|
* Validate the size of request and response buffers.
|
|
|
|
* Check for a sane response buffer so we can report
|
|
|
|
* early errors back to the guest.
|
2015-01-25 22:14:58 -07:00
|
|
|
*/
|
2018-09-17 18:09:49 -06:00
|
|
|
ret = vhost_scsi_chk_size(vq, &vc);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2018-09-17 18:09:49 -06:00
|
|
|
ret = vhost_scsi_get_req(vq, &vc, &tpg);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
ret = -EIO; /* bad target on any error from here on */
|
2014-02-24 15:13:32 -07:00
|
|
|
|
2014-02-22 19:22:31 -07:00
|
|
|
/*
|
2015-01-25 22:14:58 -07:00
|
|
|
* Determine data_direction by calculating the total outgoing
|
|
|
|
* iovec sizes + incoming iovec sizes vs. virtio-scsi request +
|
|
|
|
* response headers respectively.
|
2014-02-22 19:22:31 -07:00
|
|
|
*
|
2015-01-25 22:14:58 -07:00
|
|
|
* For DMA_TO_DEVICE this is out_iter, which is already pointing
|
|
|
|
* to the right place.
|
|
|
|
*
|
|
|
|
* For DMA_FROM_DEVICE, the iovec will be just past the end
|
|
|
|
* of the virtio-scsi response header in either the same
|
|
|
|
* or immediately following iovec.
|
2014-02-22 19:22:31 -07:00
|
|
|
*
|
2015-01-25 22:14:58 -07:00
|
|
|
* Any associated T10_PI bytes for the outgoing / incoming
|
|
|
|
* payloads are included in calculation of exp_data_len here.
|
2014-02-22 19:22:31 -07:00
|
|
|
*/
|
2015-01-25 22:14:58 -07:00
|
|
|
prot_bytes = 0;
|
|
|
|
|
2018-09-17 18:09:49 -06:00
|
|
|
if (vc.out_size > vc.req_size) {
|
2015-01-25 22:14:58 -07:00
|
|
|
data_direction = DMA_TO_DEVICE;
|
2018-09-17 18:09:49 -06:00
|
|
|
exp_data_len = vc.out_size - vc.req_size;
|
|
|
|
data_iter = vc.out_iter;
|
|
|
|
} else if (vc.in_size > vc.rsp_size) {
|
2015-01-25 22:14:58 -07:00
|
|
|
data_direction = DMA_FROM_DEVICE;
|
2018-09-17 18:09:49 -06:00
|
|
|
exp_data_len = vc.in_size - vc.rsp_size;
|
2015-01-25 22:14:58 -07:00
|
|
|
|
2018-09-17 18:09:49 -06:00
|
|
|
iov_iter_init(&in_iter, READ, &vq->iov[vc.out], vc.in,
|
|
|
|
vc.rsp_size + exp_data_len);
|
|
|
|
iov_iter_advance(&in_iter, vc.rsp_size);
|
2015-01-25 22:14:58 -07:00
|
|
|
data_iter = in_iter;
|
|
|
|
} else {
|
|
|
|
data_direction = DMA_NONE;
|
|
|
|
exp_data_len = 0;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* If T10_PI header + payload is present, setup prot_iter values
|
|
|
|
* and recalculate data_iter for vhost_scsi_mapal() mapping to
|
|
|
|
* host scatterlists via get_user_pages_fast().
|
2014-02-22 19:22:31 -07:00
|
|
|
*/
|
2015-01-25 22:14:58 -07:00
|
|
|
if (t10_pi) {
|
2014-02-22 19:22:31 -07:00
|
|
|
if (v_req_pi.pi_bytesout) {
|
|
|
|
if (data_direction != DMA_TO_DEVICE) {
|
2015-01-25 22:14:58 -07:00
|
|
|
vq_err(vq, "Received non zero pi_bytesout,"
|
|
|
|
" but wrong data_direction\n");
|
2018-09-17 18:09:49 -06:00
|
|
|
goto err;
|
2014-02-22 19:22:31 -07:00
|
|
|
}
|
2014-11-23 09:01:34 -07:00
|
|
|
prot_bytes = vhost32_to_cpu(vq, v_req_pi.pi_bytesout);
|
2014-02-22 19:22:31 -07:00
|
|
|
} else if (v_req_pi.pi_bytesin) {
|
|
|
|
if (data_direction != DMA_FROM_DEVICE) {
|
2015-01-25 22:14:58 -07:00
|
|
|
vq_err(vq, "Received non zero pi_bytesin,"
|
|
|
|
" but wrong data_direction\n");
|
2018-09-17 18:09:49 -06:00
|
|
|
goto err;
|
2014-02-22 19:22:31 -07:00
|
|
|
}
|
2014-11-23 09:01:34 -07:00
|
|
|
prot_bytes = vhost32_to_cpu(vq, v_req_pi.pi_bytesin);
|
2014-02-22 19:22:31 -07:00
|
|
|
}
|
2015-01-25 22:14:58 -07:00
|
|
|
/*
|
2018-08-22 13:21:53 -06:00
|
|
|
* Set prot_iter to data_iter and truncate it to
|
|
|
|
* prot_bytes, and advance data_iter past any
|
2015-01-25 22:14:58 -07:00
|
|
|
* preceeding prot_bytes that may be present.
|
|
|
|
*
|
|
|
|
* Also fix up the exp_data_len to reflect only the
|
|
|
|
* actual data payload length.
|
|
|
|
*/
|
2014-02-22 19:22:31 -07:00
|
|
|
if (prot_bytes) {
|
2015-01-25 22:14:58 -07:00
|
|
|
exp_data_len -= prot_bytes;
|
|
|
|
prot_iter = data_iter;
|
2018-08-22 13:21:53 -06:00
|
|
|
iov_iter_truncate(&prot_iter, prot_bytes);
|
2015-01-25 22:14:58 -07:00
|
|
|
iov_iter_advance(&data_iter, prot_bytes);
|
2014-02-22 19:22:31 -07:00
|
|
|
}
|
2014-11-23 09:01:34 -07:00
|
|
|
tag = vhost64_to_cpu(vq, v_req_pi.tag);
|
2014-02-22 19:22:31 -07:00
|
|
|
task_attr = v_req_pi.task_attr;
|
|
|
|
cdb = &v_req_pi.cdb[0];
|
|
|
|
lun = ((v_req_pi.lun[2] << 8) | v_req_pi.lun[3]) & 0x3FFF;
|
|
|
|
} else {
|
2014-11-23 09:01:34 -07:00
|
|
|
tag = vhost64_to_cpu(vq, v_req.tag);
|
2014-02-22 19:22:31 -07:00
|
|
|
task_attr = v_req.task_attr;
|
|
|
|
cdb = &v_req.cdb[0];
|
|
|
|
lun = ((v_req.lun[2] << 8) | v_req.lun[3]) & 0x3FFF;
|
|
|
|
}
|
|
|
|
/*
|
2015-01-25 22:14:58 -07:00
|
|
|
* Check that the received CDB size does not exceeded our
|
|
|
|
* hardcoded max for vhost-scsi, then get a pre-allocated
|
|
|
|
* cmd descriptor for the new virtio-scsi tag.
|
2014-02-22 19:22:31 -07:00
|
|
|
*
|
|
|
|
* TODO what if cdb was too small for varlen cdb header?
|
|
|
|
*/
|
2015-02-01 00:56:53 -07:00
|
|
|
if (unlikely(scsi_command_size(cdb) > VHOST_SCSI_MAX_CDB_SIZE)) {
|
2014-02-22 19:22:31 -07:00
|
|
|
vq_err(vq, "Received SCSI CDB with command_size: %d that"
|
|
|
|
" exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
|
2015-02-01 00:56:53 -07:00
|
|
|
scsi_command_size(cdb), VHOST_SCSI_MAX_CDB_SIZE);
|
2018-09-17 18:09:49 -06:00
|
|
|
goto err;
|
2014-02-22 19:22:31 -07:00
|
|
|
}
|
|
|
|
cmd = vhost_scsi_get_tag(vq, tpg, cdb, tag, lun, task_attr,
|
2014-06-10 02:19:38 -06:00
|
|
|
exp_data_len + prot_bytes,
|
|
|
|
data_direction);
|
2013-05-06 02:38:29 -06:00
|
|
|
if (IS_ERR(cmd)) {
|
2013-06-07 18:47:46 -06:00
|
|
|
vq_err(vq, "vhost_scsi_get_tag failed %ld\n",
|
2015-01-25 22:14:58 -07:00
|
|
|
PTR_ERR(cmd));
|
2018-09-17 18:09:49 -06:00
|
|
|
goto err;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
2013-05-06 02:38:29 -06:00
|
|
|
cmd->tvc_vhost = vs;
|
|
|
|
cmd->tvc_vq = vq;
|
2018-09-17 18:09:49 -06:00
|
|
|
cmd->tvc_resp_iov = vq->iov[vc.out];
|
|
|
|
cmd->tvc_in_iovs = vc.in;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
pr_debug("vhost_scsi got command opcode: %#02x, lun: %d\n",
|
2015-01-25 22:14:58 -07:00
|
|
|
cmd->tvc_cdb[0], cmd->tvc_lun);
|
|
|
|
pr_debug("cmd: %p exp_data_len: %d, prot_bytes: %d data_direction:"
|
|
|
|
" %d\n", cmd, exp_data_len, prot_bytes, data_direction);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
if (data_direction != DMA_NONE) {
|
2018-09-17 18:09:49 -06:00
|
|
|
if (unlikely(vhost_scsi_mapal(cmd, prot_bytes,
|
|
|
|
&prot_iter, exp_data_len,
|
|
|
|
&data_iter))) {
|
2012-07-18 15:31:32 -06:00
|
|
|
vq_err(vq, "Failed to map iov to sgl\n");
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_release_cmd(&cmd->tvc_se_cmd);
|
2018-09-17 18:09:49 -06:00
|
|
|
goto err;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Save the descriptor from vhost_get_vq_desc() to be used to
|
|
|
|
* complete the virtio-scsi request in TCM callback context via
|
2015-01-25 22:14:58 -07:00
|
|
|
* vhost_scsi_queue_data_in() and vhost_scsi_queue_status()
|
2012-07-18 15:31:32 -06:00
|
|
|
*/
|
2018-09-17 18:09:49 -06:00
|
|
|
cmd->tvc_vq_desc = vc.head;
|
2012-07-18 15:31:32 -06:00
|
|
|
/*
|
2015-01-25 22:14:58 -07:00
|
|
|
* Dispatch cmd descriptor for cmwq execution in process
|
|
|
|
* context provided by vhost_scsi_workqueue. This also ensures
|
|
|
|
* cmd is executed on the same kworker CPU as this vhost
|
|
|
|
* thread to gain positive L2 cache locality effects.
|
2012-07-18 15:31:32 -06:00
|
|
|
*/
|
2015-02-01 00:56:53 -07:00
|
|
|
INIT_WORK(&cmd->work, vhost_scsi_submission_work);
|
|
|
|
queue_work(vhost_scsi_workqueue, &cmd->work);
|
2018-09-17 18:09:49 -06:00
|
|
|
ret = 0;
|
|
|
|
err:
|
|
|
|
/*
|
|
|
|
* ENXIO: No more requests, or read error, wait for next kick
|
|
|
|
* EINVAL: Invalid response buffer, drop the request
|
|
|
|
* EIO: Respond with bad target
|
|
|
|
* EAGAIN: Pending request
|
|
|
|
*/
|
|
|
|
if (ret == -ENXIO)
|
|
|
|
break;
|
|
|
|
else if (ret == -EIO)
|
|
|
|
vhost_scsi_send_bad_target(vs, vq, vc.head, vc.out);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
2013-05-07 00:54:35 -06:00
|
|
|
out:
|
2013-04-10 01:06:14 -06:00
|
|
|
mutex_unlock(&vq->mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2018-09-17 18:09:47 -06:00
|
|
|
static void
|
2018-09-17 18:09:49 -06:00
|
|
|
vhost_scsi_send_tmf_reject(struct vhost_scsi *vs,
|
|
|
|
struct vhost_virtqueue *vq,
|
|
|
|
struct vhost_scsi_ctx *vc)
|
2018-09-17 18:09:47 -06:00
|
|
|
{
|
|
|
|
struct virtio_scsi_ctrl_tmf_resp rsp;
|
2018-12-03 17:48:23 -07:00
|
|
|
struct iov_iter iov_iter;
|
2018-09-17 18:09:47 -06:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
pr_debug("%s\n", __func__);
|
|
|
|
memset(&rsp, 0, sizeof(rsp));
|
|
|
|
rsp.response = VIRTIO_SCSI_S_FUNCTION_REJECTED;
|
2018-12-03 17:48:23 -07:00
|
|
|
|
|
|
|
iov_iter_init(&iov_iter, READ, &vq->iov[vc->out], vc->in, sizeof(rsp));
|
|
|
|
|
|
|
|
ret = copy_to_iter(&rsp, sizeof(rsp), &iov_iter);
|
|
|
|
if (likely(ret == sizeof(rsp)))
|
2018-09-17 18:09:48 -06:00
|
|
|
vhost_add_used_and_signal(&vs->dev, vq, vc->head, 0);
|
2018-09-17 18:09:47 -06:00
|
|
|
else
|
|
|
|
pr_err("Faulted on virtio_scsi_ctrl_tmf_resp\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
vhost_scsi_send_an_resp(struct vhost_scsi *vs,
|
2018-09-17 18:09:48 -06:00
|
|
|
struct vhost_virtqueue *vq,
|
|
|
|
struct vhost_scsi_ctx *vc)
|
2018-09-17 18:09:47 -06:00
|
|
|
{
|
|
|
|
struct virtio_scsi_ctrl_an_resp rsp;
|
2018-12-03 17:48:23 -07:00
|
|
|
struct iov_iter iov_iter;
|
2018-09-17 18:09:47 -06:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
pr_debug("%s\n", __func__);
|
|
|
|
memset(&rsp, 0, sizeof(rsp)); /* event_actual = 0 */
|
|
|
|
rsp.response = VIRTIO_SCSI_S_OK;
|
2018-12-03 17:48:23 -07:00
|
|
|
|
|
|
|
iov_iter_init(&iov_iter, READ, &vq->iov[vc->out], vc->in, sizeof(rsp));
|
|
|
|
|
|
|
|
ret = copy_to_iter(&rsp, sizeof(rsp), &iov_iter);
|
|
|
|
if (likely(ret == sizeof(rsp)))
|
2018-09-17 18:09:48 -06:00
|
|
|
vhost_add_used_and_signal(&vs->dev, vq, vc->head, 0);
|
2018-09-17 18:09:47 -06:00
|
|
|
else
|
|
|
|
pr_err("Faulted on virtio_scsi_ctrl_an_resp\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
vhost_scsi_ctl_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
|
|
|
|
{
|
|
|
|
union {
|
|
|
|
__virtio32 type;
|
|
|
|
struct virtio_scsi_ctrl_an_req an;
|
|
|
|
struct virtio_scsi_ctrl_tmf_req tmf;
|
|
|
|
} v_req;
|
2018-09-17 18:09:48 -06:00
|
|
|
struct vhost_scsi_ctx vc;
|
|
|
|
size_t typ_size;
|
|
|
|
int ret;
|
2018-09-17 18:09:47 -06:00
|
|
|
|
|
|
|
mutex_lock(&vq->mutex);
|
|
|
|
/*
|
|
|
|
* We can handle the vq only after the endpoint is setup by calling the
|
|
|
|
* VHOST_SCSI_SET_ENDPOINT ioctl.
|
|
|
|
*/
|
|
|
|
if (!vq->private_data)
|
|
|
|
goto out;
|
|
|
|
|
2018-09-17 18:09:48 -06:00
|
|
|
memset(&vc, 0, sizeof(vc));
|
|
|
|
|
2018-09-17 18:09:47 -06:00
|
|
|
vhost_disable_notify(&vs->dev, vq);
|
|
|
|
|
|
|
|
for (;;) {
|
2018-09-17 18:09:48 -06:00
|
|
|
ret = vhost_scsi_get_desc(vs, vq, &vc);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
2018-09-17 18:09:47 -06:00
|
|
|
|
|
|
|
/*
|
2018-09-17 18:09:48 -06:00
|
|
|
* Get the request type first in order to setup
|
|
|
|
* other parameters dependent on the type.
|
2018-09-17 18:09:47 -06:00
|
|
|
*/
|
2018-09-17 18:09:48 -06:00
|
|
|
vc.req = &v_req.type;
|
2018-09-17 18:09:47 -06:00
|
|
|
typ_size = sizeof(v_req.type);
|
|
|
|
|
2018-09-17 18:09:48 -06:00
|
|
|
if (unlikely(!copy_from_iter_full(vc.req, typ_size,
|
|
|
|
&vc.out_iter))) {
|
2018-09-17 18:09:47 -06:00
|
|
|
vq_err(vq, "Faulted on copy_from_iter tmf type\n");
|
|
|
|
/*
|
2018-09-17 18:09:48 -06:00
|
|
|
* The size of the response buffer depends on the
|
|
|
|
* request type and must be validated against it.
|
2018-09-17 18:09:47 -06:00
|
|
|
* Since the request type is not known, don't send
|
|
|
|
* a response.
|
|
|
|
*/
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (v_req.type) {
|
|
|
|
case VIRTIO_SCSI_T_TMF:
|
2018-09-17 18:09:48 -06:00
|
|
|
vc.req = &v_req.tmf;
|
|
|
|
vc.req_size = sizeof(struct virtio_scsi_ctrl_tmf_req);
|
|
|
|
vc.rsp_size = sizeof(struct virtio_scsi_ctrl_tmf_resp);
|
|
|
|
vc.lunp = &v_req.tmf.lun[0];
|
|
|
|
vc.target = &v_req.tmf.lun[1];
|
2018-09-17 18:09:47 -06:00
|
|
|
break;
|
|
|
|
case VIRTIO_SCSI_T_AN_QUERY:
|
|
|
|
case VIRTIO_SCSI_T_AN_SUBSCRIBE:
|
2018-09-17 18:09:48 -06:00
|
|
|
vc.req = &v_req.an;
|
|
|
|
vc.req_size = sizeof(struct virtio_scsi_ctrl_an_req);
|
|
|
|
vc.rsp_size = sizeof(struct virtio_scsi_ctrl_an_resp);
|
|
|
|
vc.lunp = &v_req.an.lun[0];
|
|
|
|
vc.target = NULL;
|
2018-09-17 18:09:47 -06:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
vq_err(vq, "Unknown control request %d", v_req.type);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2018-09-17 18:09:48 -06:00
|
|
|
* Validate the size of request and response buffers.
|
|
|
|
* Check for a sane response buffer so we can report
|
|
|
|
* early errors back to the guest.
|
2018-09-17 18:09:47 -06:00
|
|
|
*/
|
2018-09-17 18:09:48 -06:00
|
|
|
ret = vhost_scsi_chk_size(vq, &vc);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
2018-09-17 18:09:47 -06:00
|
|
|
|
2018-09-17 18:09:48 -06:00
|
|
|
/*
|
|
|
|
* Get the rest of the request now that its size is known.
|
|
|
|
*/
|
|
|
|
vc.req += typ_size;
|
|
|
|
vc.req_size -= typ_size;
|
2018-09-17 18:09:47 -06:00
|
|
|
|
2018-09-17 18:09:48 -06:00
|
|
|
ret = vhost_scsi_get_req(vq, &vc, NULL);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
2018-09-17 18:09:47 -06:00
|
|
|
|
2018-09-17 18:09:48 -06:00
|
|
|
if (v_req.type == VIRTIO_SCSI_T_TMF)
|
2018-09-17 18:09:49 -06:00
|
|
|
vhost_scsi_send_tmf_reject(vs, vq, &vc);
|
2018-09-17 18:09:48 -06:00
|
|
|
else
|
|
|
|
vhost_scsi_send_an_resp(vs, vq, &vc);
|
|
|
|
err:
|
|
|
|
/*
|
|
|
|
* ENXIO: No more requests, or read error, wait for next kick
|
|
|
|
* EINVAL: Invalid response buffer, drop the request
|
|
|
|
* EIO: Respond with bad target
|
|
|
|
* EAGAIN: Pending request
|
|
|
|
*/
|
|
|
|
if (ret == -ENXIO)
|
|
|
|
break;
|
|
|
|
else if (ret == -EIO)
|
|
|
|
vhost_scsi_send_bad_target(vs, vq, vc.head, vc.out);
|
2018-09-17 18:09:47 -06:00
|
|
|
}
|
|
|
|
out:
|
|
|
|
mutex_unlock(&vq->mutex);
|
|
|
|
}
|
|
|
|
|
2012-07-18 15:31:32 -06:00
|
|
|
static void vhost_scsi_ctl_handle_kick(struct vhost_work *work)
|
|
|
|
{
|
2018-09-17 18:09:47 -06:00
|
|
|
struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue,
|
|
|
|
poll.work);
|
|
|
|
struct vhost_scsi *vs = container_of(vq->dev, struct vhost_scsi, dev);
|
|
|
|
|
2012-07-30 14:30:00 -06:00
|
|
|
pr_debug("%s: The handling func for control queue.\n", __func__);
|
2018-09-17 18:09:47 -06:00
|
|
|
vhost_scsi_ctl_handle_vq(vs, vq);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static void
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_send_evt(struct vhost_scsi *vs,
|
|
|
|
struct vhost_scsi_tpg *tpg,
|
2013-05-06 02:38:27 -06:00
|
|
|
struct se_lun *lun,
|
|
|
|
u32 event,
|
|
|
|
u32 reason)
|
2013-04-25 01:35:21 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_evt *evt;
|
2013-04-25 01:35:21 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
evt = vhost_scsi_allocate_evt(vs, event, reason);
|
2013-04-25 01:35:21 -06:00
|
|
|
if (!evt)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (tpg && lun) {
|
|
|
|
/* TODO: share lun setup code with virtio-scsi.ko */
|
|
|
|
/*
|
|
|
|
* Note: evt->event is zeroed when we allocate it and
|
|
|
|
* lun[4-7] need to be zero according to virtio-scsi spec.
|
|
|
|
*/
|
|
|
|
evt->event.lun[0] = 0x01;
|
2015-02-05 00:37:33 -07:00
|
|
|
evt->event.lun[1] = tpg->tport_tpgt;
|
2013-04-25 01:35:21 -06:00
|
|
|
if (lun->unpacked_lun >= 256)
|
|
|
|
evt->event.lun[2] = lun->unpacked_lun >> 8 | 0x40 ;
|
|
|
|
evt->event.lun[3] = lun->unpacked_lun & 0xFF;
|
|
|
|
}
|
|
|
|
|
|
|
|
llist_add(&evt->list, &vs->vs_event_list);
|
|
|
|
vhost_work_queue(&vs->dev, &vs->vs_event_work);
|
|
|
|
}
|
|
|
|
|
2012-07-18 15:31:32 -06:00
|
|
|
static void vhost_scsi_evt_handle_kick(struct vhost_work *work)
|
|
|
|
{
|
2013-04-25 01:35:21 -06:00
|
|
|
struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue,
|
|
|
|
poll.work);
|
|
|
|
struct vhost_scsi *vs = container_of(vq->dev, struct vhost_scsi, dev);
|
|
|
|
|
|
|
|
mutex_lock(&vq->mutex);
|
|
|
|
if (!vq->private_data)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (vs->vs_events_missed)
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_send_evt(vs, NULL, NULL, VIRTIO_SCSI_T_NO_EVENT, 0);
|
2013-04-25 01:35:21 -06:00
|
|
|
out:
|
|
|
|
mutex_unlock(&vq->mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static void vhost_scsi_handle_kick(struct vhost_work *work)
|
|
|
|
{
|
|
|
|
struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue,
|
|
|
|
poll.work);
|
|
|
|
struct vhost_scsi *vs = container_of(vq->dev, struct vhost_scsi, dev);
|
|
|
|
|
tcm_vhost: Multi-queue support
This adds virtio-scsi multi-queue support to tcm_vhost. In order to use
multi-queue, guest side multi-queue support is need. It can
be found here:
https://lkml.org/lkml/2012/12/18/166
Currently, only one thread is created by vhost core code for each
vhost_scsi instance. Even if there are multi-queues, all the handling of
guest kick (vhost_scsi_handle_kick) are processed in one thread. This is
not optimal. Luckily, most of the work is offloaded to the tcm_vhost
workqueue.
Some initial perf numbers:
1 queue, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 127K/127k IOPS
4 queues, 4 targets, 1 lun per target
4K request size, 50% randread + 50% randwrite: 181K/181k IOPS
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-02-05 22:20:59 -07:00
|
|
|
vhost_scsi_handle_vq(vs, vq);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2013-04-03 00:17:37 -06:00
|
|
|
static void vhost_scsi_flush_vq(struct vhost_scsi *vs, int index)
|
|
|
|
{
|
2013-04-26 21:16:48 -06:00
|
|
|
vhost_poll_flush(&vs->vqs[index].vq.poll);
|
2013-04-03 00:17:37 -06:00
|
|
|
}
|
|
|
|
|
2013-04-28 06:38:52 -06:00
|
|
|
/* Callers must hold dev mutex */
|
2013-04-03 00:17:37 -06:00
|
|
|
static void vhost_scsi_flush(struct vhost_scsi *vs)
|
|
|
|
{
|
2013-04-26 21:16:49 -06:00
|
|
|
struct vhost_scsi_inflight *old_inflight[VHOST_SCSI_MAX_VQ];
|
2013-04-03 00:17:37 -06:00
|
|
|
int i;
|
|
|
|
|
2013-04-26 21:16:49 -06:00
|
|
|
/* Init new inflight and remember the old inflight */
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_init_inflight(vs, old_inflight);
|
2013-04-26 21:16:49 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* The inflight->kref was initialized to 1. We decrement it here to
|
|
|
|
* indicate the start of the flush operation so that it will reach 0
|
|
|
|
* when all the reqs are finished.
|
|
|
|
*/
|
|
|
|
for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
|
2015-02-01 00:56:53 -07:00
|
|
|
kref_put(&old_inflight[i]->kref, vhost_scsi_done_inflight);
|
2013-04-26 21:16:49 -06:00
|
|
|
|
|
|
|
/* Flush both the vhost poll and vhost work */
|
2013-04-03 00:17:37 -06:00
|
|
|
for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
|
|
|
|
vhost_scsi_flush_vq(vs, i);
|
|
|
|
vhost_work_flush(&vs->dev, &vs->vs_completion_work);
|
2013-04-25 01:35:21 -06:00
|
|
|
vhost_work_flush(&vs->dev, &vs->vs_event_work);
|
2013-04-26 21:16:49 -06:00
|
|
|
|
|
|
|
/* Wait for all reqs issued before the flush to be finished */
|
|
|
|
for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
|
|
|
|
wait_for_completion(&old_inflight[i]->comp);
|
2013-04-03 00:17:37 -06:00
|
|
|
}
|
|
|
|
|
2012-07-18 15:31:32 -06:00
|
|
|
/*
|
|
|
|
* Called from vhost_scsi_ioctl() context to walk the list of available
|
2015-02-01 00:56:53 -07:00
|
|
|
* vhost_scsi_tpg with an active struct vhost_scsi_nexus
|
2013-04-25 01:35:20 -06:00
|
|
|
*
|
|
|
|
* The lock nesting rule is:
|
2015-02-01 00:56:53 -07:00
|
|
|
* vhost_scsi_mutex -> vs->dev.mutex -> tpg->tv_tpg_mutex -> vq->mutex
|
2012-07-18 15:31:32 -06:00
|
|
|
*/
|
2013-05-06 02:38:27 -06:00
|
|
|
static int
|
|
|
|
vhost_scsi_set_endpoint(struct vhost_scsi *vs,
|
|
|
|
struct vhost_scsi_target *t)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2014-10-08 00:19:20 -06:00
|
|
|
struct se_portal_group *se_tpg;
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tport *tv_tport;
|
|
|
|
struct vhost_scsi_tpg *tpg;
|
|
|
|
struct vhost_scsi_tpg **vs_tpg;
|
2013-04-03 00:17:37 -06:00
|
|
|
struct vhost_virtqueue *vq;
|
|
|
|
int index, ret, i, len;
|
2013-02-04 21:31:57 -07:00
|
|
|
bool match = false;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_lock(&vhost_scsi_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
mutex_lock(&vs->dev.mutex);
|
2013-04-25 01:35:20 -06:00
|
|
|
|
2012-07-18 15:31:32 -06:00
|
|
|
/* Verify that ring has been setup correctly. */
|
|
|
|
for (index = 0; index < vs->dev.nvqs; ++index) {
|
|
|
|
/* Verify that ring has been setup correctly. */
|
2013-04-26 21:16:48 -06:00
|
|
|
if (!vhost_vq_access_ok(&vs->vqs[index].vq)) {
|
2013-04-25 01:35:20 -06:00
|
|
|
ret = -EFAULT;
|
|
|
|
goto out;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-04-03 00:17:37 -06:00
|
|
|
len = sizeof(vs_tpg[0]) * VHOST_SCSI_MAX_TARGET;
|
|
|
|
vs_tpg = kzalloc(len, GFP_KERNEL);
|
|
|
|
if (!vs_tpg) {
|
2013-04-25 01:35:20 -06:00
|
|
|
ret = -ENOMEM;
|
|
|
|
goto out;
|
2013-04-03 00:17:37 -06:00
|
|
|
}
|
|
|
|
if (vs->vs_tpg)
|
|
|
|
memcpy(vs_tpg, vs->vs_tpg, len);
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
list_for_each_entry(tpg, &vhost_scsi_list, tv_tpg_list) {
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_lock(&tpg->tv_tpg_mutex);
|
|
|
|
if (!tpg->tpg_nexus) {
|
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
continue;
|
|
|
|
}
|
2013-05-06 02:38:28 -06:00
|
|
|
if (tpg->tv_tpg_vhost_count != 0) {
|
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
continue;
|
|
|
|
}
|
2013-05-06 02:38:28 -06:00
|
|
|
tv_tport = tpg->tport;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2013-02-04 21:31:57 -07:00
|
|
|
if (!strcmp(tv_tport->tport_name, t->vhost_wwpn)) {
|
2013-05-06 02:38:28 -06:00
|
|
|
if (vs->vs_tpg && vs->vs_tpg[tpg->tport_tpgt]) {
|
2013-04-03 00:17:37 -06:00
|
|
|
kfree(vs_tpg);
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2013-04-25 01:35:20 -06:00
|
|
|
ret = -EEXIST;
|
|
|
|
goto out;
|
2012-07-30 14:30:00 -06:00
|
|
|
}
|
2014-10-08 00:19:20 -06:00
|
|
|
/*
|
|
|
|
* In order to ensure individual vhost-scsi configfs
|
|
|
|
* groups cannot be removed while in use by vhost ioctl,
|
|
|
|
* go ahead and take an explicit se_tpg->tpg_group.cg_item
|
|
|
|
* dependency now.
|
|
|
|
*/
|
|
|
|
se_tpg = &tpg->se_tpg;
|
2015-05-03 00:50:52 -06:00
|
|
|
ret = target_depend_item(&se_tpg->tpg_group.cg_item);
|
2014-10-08 00:19:20 -06:00
|
|
|
if (ret) {
|
2018-12-12 18:10:14 -07:00
|
|
|
pr_warn("target_depend_item() failed: %d\n", ret);
|
2014-10-08 00:19:20 -06:00
|
|
|
kfree(vs_tpg);
|
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
|
|
|
goto out;
|
|
|
|
}
|
2013-05-06 02:38:28 -06:00
|
|
|
tpg->tv_tpg_vhost_count++;
|
|
|
|
tpg->vhost_scsi = vs;
|
|
|
|
vs_tpg[tpg->tport_tpgt] = tpg;
|
2014-03-17 11:06:10 -06:00
|
|
|
smp_mb__after_atomic();
|
2013-02-04 21:31:57 -07:00
|
|
|
match = true;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
2013-02-04 21:31:57 -07:00
|
|
|
|
|
|
|
if (match) {
|
|
|
|
memcpy(vs->vs_vhost_wwpn, t->vhost_wwpn,
|
|
|
|
sizeof(vs->vs_vhost_wwpn));
|
2013-04-03 00:17:37 -06:00
|
|
|
for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {
|
2013-04-26 21:16:48 -06:00
|
|
|
vq = &vs->vqs[i].vq;
|
2013-04-03 00:17:37 -06:00
|
|
|
mutex_lock(&vq->mutex);
|
2013-05-07 00:54:36 -06:00
|
|
|
vq->private_data = vs_tpg;
|
2016-02-16 07:59:44 -07:00
|
|
|
vhost_vq_init_access(vq);
|
2013-04-03 00:17:37 -06:00
|
|
|
mutex_unlock(&vq->mutex);
|
|
|
|
}
|
2013-02-04 21:31:57 -07:00
|
|
|
ret = 0;
|
|
|
|
} else {
|
|
|
|
ret = -EEXIST;
|
|
|
|
}
|
|
|
|
|
2013-04-03 00:17:37 -06:00
|
|
|
/*
|
|
|
|
* Act as synchronize_rcu to make sure access to
|
|
|
|
* old vs->vs_tpg is finished.
|
|
|
|
*/
|
|
|
|
vhost_scsi_flush(vs);
|
|
|
|
kfree(vs->vs_tpg);
|
|
|
|
vs->vs_tpg = vs_tpg;
|
|
|
|
|
2013-04-25 01:35:20 -06:00
|
|
|
out:
|
2013-02-04 21:31:57 -07:00
|
|
|
mutex_unlock(&vs->dev.mutex);
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_unlock(&vhost_scsi_mutex);
|
2013-02-04 21:31:57 -07:00
|
|
|
return ret;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static int
|
|
|
|
vhost_scsi_clear_endpoint(struct vhost_scsi *vs,
|
|
|
|
struct vhost_scsi_target *t)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2014-10-08 00:19:20 -06:00
|
|
|
struct se_portal_group *se_tpg;
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tport *tv_tport;
|
|
|
|
struct vhost_scsi_tpg *tpg;
|
2013-04-03 00:17:37 -06:00
|
|
|
struct vhost_virtqueue *vq;
|
|
|
|
bool match = false;
|
2013-02-04 21:31:57 -07:00
|
|
|
int index, ret, i;
|
|
|
|
u8 target;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_lock(&vhost_scsi_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
mutex_lock(&vs->dev.mutex);
|
|
|
|
/* Verify that ring has been setup correctly. */
|
|
|
|
for (index = 0; index < vs->dev.nvqs; ++index) {
|
2013-04-26 21:16:48 -06:00
|
|
|
if (!vhost_vq_access_ok(&vs->vqs[index].vq)) {
|
2012-07-30 14:30:00 -06:00
|
|
|
ret = -EFAULT;
|
2013-03-14 19:14:05 -06:00
|
|
|
goto err_dev;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
}
|
2013-04-03 00:17:37 -06:00
|
|
|
|
|
|
|
if (!vs->vs_tpg) {
|
2013-04-25 01:35:20 -06:00
|
|
|
ret = 0;
|
|
|
|
goto err_dev;
|
2013-04-03 00:17:37 -06:00
|
|
|
}
|
|
|
|
|
2013-02-04 21:31:57 -07:00
|
|
|
for (i = 0; i < VHOST_SCSI_MAX_TARGET; i++) {
|
|
|
|
target = i;
|
2013-05-06 02:38:28 -06:00
|
|
|
tpg = vs->vs_tpg[target];
|
|
|
|
if (!tpg)
|
2013-02-04 21:31:57 -07:00
|
|
|
continue;
|
|
|
|
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_lock(&tpg->tv_tpg_mutex);
|
|
|
|
tv_tport = tpg->tport;
|
2013-02-04 21:31:57 -07:00
|
|
|
if (!tv_tport) {
|
|
|
|
ret = -ENODEV;
|
2013-03-14 19:14:05 -06:00
|
|
|
goto err_tpg;
|
2013-02-04 21:31:57 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
if (strcmp(tv_tport->tport_name, t->vhost_wwpn)) {
|
2013-05-06 02:38:28 -06:00
|
|
|
pr_warn("tv_tport->tport_name: %s, tpg->tport_tpgt: %hu"
|
2013-02-04 21:31:57 -07:00
|
|
|
" does not match t->vhost_wwpn: %s, t->vhost_tpgt: %hu\n",
|
2013-05-06 02:38:28 -06:00
|
|
|
tv_tport->tport_name, tpg->tport_tpgt,
|
2013-02-04 21:31:57 -07:00
|
|
|
t->vhost_wwpn, t->vhost_tpgt);
|
|
|
|
ret = -EINVAL;
|
2013-03-14 19:14:05 -06:00
|
|
|
goto err_tpg;
|
2013-02-04 21:31:57 -07:00
|
|
|
}
|
2013-05-06 02:38:28 -06:00
|
|
|
tpg->tv_tpg_vhost_count--;
|
|
|
|
tpg->vhost_scsi = NULL;
|
2013-02-04 21:31:57 -07:00
|
|
|
vs->vs_tpg[target] = NULL;
|
2013-04-03 00:17:37 -06:00
|
|
|
match = true;
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2014-10-08 00:19:20 -06:00
|
|
|
/*
|
|
|
|
* Release se_tpg->tpg_group.cg_item configfs dependency now
|
|
|
|
* to allow vhost-scsi WWPN se_tpg->tpg_group shutdown to occur.
|
|
|
|
*/
|
|
|
|
se_tpg = &tpg->se_tpg;
|
2015-05-03 00:50:52 -06:00
|
|
|
target_undepend_item(&se_tpg->tpg_group.cg_item);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
2013-04-03 00:17:37 -06:00
|
|
|
if (match) {
|
|
|
|
for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {
|
2013-04-26 21:16:48 -06:00
|
|
|
vq = &vs->vqs[i].vq;
|
2013-04-03 00:17:37 -06:00
|
|
|
mutex_lock(&vq->mutex);
|
2013-05-07 00:54:36 -06:00
|
|
|
vq->private_data = NULL;
|
2013-04-03 00:17:37 -06:00
|
|
|
mutex_unlock(&vq->mutex);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Act as synchronize_rcu to make sure access to
|
|
|
|
* old vs->vs_tpg is finished.
|
|
|
|
*/
|
|
|
|
vhost_scsi_flush(vs);
|
|
|
|
kfree(vs->vs_tpg);
|
|
|
|
vs->vs_tpg = NULL;
|
2013-04-25 01:35:21 -06:00
|
|
|
WARN_ON(vs->vs_events_nr);
|
2012-07-18 15:31:32 -06:00
|
|
|
mutex_unlock(&vs->dev.mutex);
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_unlock(&vhost_scsi_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
return 0;
|
2012-07-30 14:30:00 -06:00
|
|
|
|
2013-03-14 19:14:05 -06:00
|
|
|
err_tpg:
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2013-03-14 19:14:05 -06:00
|
|
|
err_dev:
|
2012-07-30 14:30:00 -06:00
|
|
|
mutex_unlock(&vs->dev.mutex);
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_unlock(&vhost_scsi_mutex);
|
2012-07-30 14:30:00 -06:00
|
|
|
return ret;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2013-04-03 00:17:37 -06:00
|
|
|
static int vhost_scsi_set_features(struct vhost_scsi *vs, u64 features)
|
|
|
|
{
|
2014-06-05 06:20:23 -06:00
|
|
|
struct vhost_virtqueue *vq;
|
|
|
|
int i;
|
|
|
|
|
2013-04-03 00:17:37 -06:00
|
|
|
if (features & ~VHOST_SCSI_FEATURES)
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
|
|
mutex_lock(&vs->dev.mutex);
|
|
|
|
if ((features & (1 << VHOST_F_LOG_ALL)) &&
|
|
|
|
!vhost_log_access_ok(&vs->dev)) {
|
|
|
|
mutex_unlock(&vs->dev.mutex);
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
2014-06-05 06:20:23 -06:00
|
|
|
|
|
|
|
for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {
|
|
|
|
vq = &vs->vqs[i].vq;
|
|
|
|
mutex_lock(&vq->mutex);
|
|
|
|
vq->acked_features = features;
|
|
|
|
mutex_unlock(&vq->mutex);
|
|
|
|
}
|
2013-04-03 00:17:37 -06:00
|
|
|
mutex_unlock(&vs->dev.mutex);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-07-18 15:31:32 -06:00
|
|
|
static int vhost_scsi_open(struct inode *inode, struct file *f)
|
|
|
|
{
|
2013-05-06 02:38:26 -06:00
|
|
|
struct vhost_scsi *vs;
|
2013-04-26 21:16:48 -06:00
|
|
|
struct vhost_virtqueue **vqs;
|
2013-09-17 00:30:34 -06:00
|
|
|
int r = -ENOMEM, i;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2017-07-12 15:36:45 -06:00
|
|
|
vs = kzalloc(sizeof(*vs), GFP_KERNEL | __GFP_NOWARN | __GFP_RETRY_MAYFAIL);
|
2013-09-17 00:30:34 -06:00
|
|
|
if (!vs) {
|
|
|
|
vs = vzalloc(sizeof(*vs));
|
|
|
|
if (!vs)
|
|
|
|
goto err_vs;
|
|
|
|
}
|
2012-07-18 15:31:32 -06:00
|
|
|
|
treewide: kmalloc() -> kmalloc_array()
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This
patch replaces cases of:
kmalloc(a * b, gfp)
with:
kmalloc_array(a * b, gfp)
as well as handling cases of:
kmalloc(a * b * c, gfp)
with:
kmalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kmalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kmalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The tools/ directory was manually excluded, since it has its own
implementation of kmalloc().
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kmalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kmalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kmalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kmalloc
+ kmalloc_array
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kmalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kmalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kmalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kmalloc(sizeof(THING) * C2, ...)
|
kmalloc(sizeof(TYPE) * C2, ...)
|
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(C1 * C2, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * E2
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 14:55:00 -06:00
|
|
|
vqs = kmalloc_array(VHOST_SCSI_MAX_VQ, sizeof(*vqs), GFP_KERNEL);
|
2013-09-17 00:30:34 -06:00
|
|
|
if (!vqs)
|
|
|
|
goto err_vqs;
|
2013-04-26 21:16:48 -06:00
|
|
|
|
2013-05-06 02:38:26 -06:00
|
|
|
vhost_work_init(&vs->vs_completion_work, vhost_scsi_complete_cmd_work);
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_work_init(&vs->vs_event_work, vhost_scsi_evt_work);
|
2013-04-25 01:35:21 -06:00
|
|
|
|
2013-05-06 02:38:26 -06:00
|
|
|
vs->vs_events_nr = 0;
|
|
|
|
vs->vs_events_missed = false;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2013-05-06 02:38:26 -06:00
|
|
|
vqs[VHOST_SCSI_VQ_CTL] = &vs->vqs[VHOST_SCSI_VQ_CTL].vq;
|
|
|
|
vqs[VHOST_SCSI_VQ_EVT] = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
|
|
|
|
vs->vqs[VHOST_SCSI_VQ_CTL].vq.handle_kick = vhost_scsi_ctl_handle_kick;
|
|
|
|
vs->vqs[VHOST_SCSI_VQ_EVT].vq.handle_kick = vhost_scsi_evt_handle_kick;
|
2013-04-26 21:16:48 -06:00
|
|
|
for (i = VHOST_SCSI_VQ_IO; i < VHOST_SCSI_MAX_VQ; i++) {
|
2013-05-06 02:38:26 -06:00
|
|
|
vqs[i] = &vs->vqs[i].vq;
|
|
|
|
vs->vqs[i].vq.handle_kick = vhost_scsi_handle_kick;
|
2013-04-26 21:16:48 -06:00
|
|
|
}
|
2019-01-28 00:05:05 -07:00
|
|
|
vhost_dev_init(&vs->dev, vqs, VHOST_SCSI_MAX_VQ, UIO_MAXIOV);
|
2013-04-26 21:16:49 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_init_inflight(vs, NULL);
|
2013-04-26 21:16:49 -06:00
|
|
|
|
2013-05-06 02:38:26 -06:00
|
|
|
f->private_data = vs;
|
2012-07-18 15:31:32 -06:00
|
|
|
return 0;
|
2013-09-17 00:30:34 -06:00
|
|
|
|
|
|
|
err_vqs:
|
2014-06-12 10:00:01 -06:00
|
|
|
kvfree(vs);
|
2013-09-17 00:30:34 -06:00
|
|
|
err_vs:
|
|
|
|
return r;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int vhost_scsi_release(struct inode *inode, struct file *f)
|
|
|
|
{
|
2013-05-06 02:38:26 -06:00
|
|
|
struct vhost_scsi *vs = f->private_data;
|
2013-02-04 21:31:57 -07:00
|
|
|
struct vhost_scsi_target t;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2013-05-06 02:38:26 -06:00
|
|
|
mutex_lock(&vs->dev.mutex);
|
|
|
|
memcpy(t.vhost_wwpn, vs->vs_vhost_wwpn, sizeof(t.vhost_wwpn));
|
|
|
|
mutex_unlock(&vs->dev.mutex);
|
|
|
|
vhost_scsi_clear_endpoint(vs, &t);
|
|
|
|
vhost_dev_stop(&vs->dev);
|
2017-12-24 09:08:58 -07:00
|
|
|
vhost_dev_cleanup(&vs->dev);
|
2013-04-25 01:35:21 -06:00
|
|
|
/* Jobs can re-queue themselves in evt kick handler. Do extra flush. */
|
2013-05-06 02:38:26 -06:00
|
|
|
vhost_scsi_flush(vs);
|
|
|
|
kfree(vs->dev.vqs);
|
2014-06-12 10:00:01 -06:00
|
|
|
kvfree(vs);
|
2012-07-18 15:31:32 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static long
|
|
|
|
vhost_scsi_ioctl(struct file *f,
|
|
|
|
unsigned int ioctl,
|
|
|
|
unsigned long arg)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
struct vhost_scsi *vs = f->private_data;
|
|
|
|
struct vhost_scsi_target backend;
|
|
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
u64 __user *featurep = argp;
|
2013-04-25 01:35:22 -06:00
|
|
|
u32 __user *eventsp = argp;
|
|
|
|
u32 events_missed;
|
2012-07-18 15:31:32 -06:00
|
|
|
u64 features;
|
2012-07-30 14:30:00 -06:00
|
|
|
int r, abi_version = VHOST_SCSI_ABI_VERSION;
|
2013-04-26 21:16:48 -06:00
|
|
|
struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
switch (ioctl) {
|
|
|
|
case VHOST_SCSI_SET_ENDPOINT:
|
|
|
|
if (copy_from_user(&backend, argp, sizeof backend))
|
|
|
|
return -EFAULT;
|
2012-08-18 16:44:09 -06:00
|
|
|
if (backend.reserved != 0)
|
|
|
|
return -EOPNOTSUPP;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
return vhost_scsi_set_endpoint(vs, &backend);
|
|
|
|
case VHOST_SCSI_CLEAR_ENDPOINT:
|
|
|
|
if (copy_from_user(&backend, argp, sizeof backend))
|
|
|
|
return -EFAULT;
|
2012-08-18 16:44:09 -06:00
|
|
|
if (backend.reserved != 0)
|
|
|
|
return -EOPNOTSUPP;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
return vhost_scsi_clear_endpoint(vs, &backend);
|
|
|
|
case VHOST_SCSI_GET_ABI_VERSION:
|
2012-07-30 14:30:00 -06:00
|
|
|
if (copy_to_user(argp, &abi_version, sizeof abi_version))
|
2012-07-18 15:31:32 -06:00
|
|
|
return -EFAULT;
|
|
|
|
return 0;
|
2013-04-25 01:35:22 -06:00
|
|
|
case VHOST_SCSI_SET_EVENTS_MISSED:
|
|
|
|
if (get_user(events_missed, eventsp))
|
|
|
|
return -EFAULT;
|
|
|
|
mutex_lock(&vq->mutex);
|
|
|
|
vs->vs_events_missed = events_missed;
|
|
|
|
mutex_unlock(&vq->mutex);
|
|
|
|
return 0;
|
|
|
|
case VHOST_SCSI_GET_EVENTS_MISSED:
|
|
|
|
mutex_lock(&vq->mutex);
|
|
|
|
events_missed = vs->vs_events_missed;
|
|
|
|
mutex_unlock(&vq->mutex);
|
|
|
|
if (put_user(events_missed, eventsp))
|
|
|
|
return -EFAULT;
|
|
|
|
return 0;
|
2012-07-18 15:31:32 -06:00
|
|
|
case VHOST_GET_FEATURES:
|
2013-03-27 18:23:41 -06:00
|
|
|
features = VHOST_SCSI_FEATURES;
|
2012-07-18 15:31:32 -06:00
|
|
|
if (copy_to_user(featurep, &features, sizeof features))
|
|
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
|
|
case VHOST_SET_FEATURES:
|
|
|
|
if (copy_from_user(&features, featurep, sizeof features))
|
|
|
|
return -EFAULT;
|
|
|
|
return vhost_scsi_set_features(vs, features);
|
|
|
|
default:
|
|
|
|
mutex_lock(&vs->dev.mutex);
|
2012-12-06 05:03:34 -07:00
|
|
|
r = vhost_dev_ioctl(&vs->dev, ioctl, argp);
|
|
|
|
/* TODO: flush backend after dev ioctl. */
|
|
|
|
if (r == -ENOIOCTLCMD)
|
|
|
|
r = vhost_vring_ioctl(&vs->dev, ioctl, argp);
|
2012-07-18 15:31:32 -06:00
|
|
|
mutex_unlock(&vs->dev.mutex);
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-07-30 14:30:00 -06:00
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
static long vhost_scsi_compat_ioctl(struct file *f, unsigned int ioctl,
|
|
|
|
unsigned long arg)
|
|
|
|
{
|
|
|
|
return vhost_scsi_ioctl(f, ioctl, (unsigned long)compat_ptr(arg));
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2012-07-18 15:31:32 -06:00
|
|
|
static const struct file_operations vhost_scsi_fops = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.release = vhost_scsi_release,
|
|
|
|
.unlocked_ioctl = vhost_scsi_ioctl,
|
2012-07-30 14:30:00 -06:00
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
.compat_ioctl = vhost_scsi_compat_ioctl,
|
|
|
|
#endif
|
2012-07-18 15:31:32 -06:00
|
|
|
.open = vhost_scsi_open,
|
|
|
|
.llseek = noop_llseek,
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct miscdevice vhost_scsi_misc = {
|
|
|
|
MISC_DYNAMIC_MINOR,
|
|
|
|
"vhost-scsi",
|
|
|
|
&vhost_scsi_fops,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init vhost_scsi_register(void)
|
|
|
|
{
|
|
|
|
return misc_register(&vhost_scsi_misc);
|
|
|
|
}
|
|
|
|
|
2015-07-30 16:59:57 -06:00
|
|
|
static void vhost_scsi_deregister(void)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-07-30 16:59:57 -06:00
|
|
|
misc_deregister(&vhost_scsi_misc);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static char *vhost_scsi_dump_proto_id(struct vhost_scsi_tport *tport)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
switch (tport->tport_proto_id) {
|
|
|
|
case SCSI_PROTOCOL_SAS:
|
|
|
|
return "SAS";
|
|
|
|
case SCSI_PROTOCOL_FCP:
|
|
|
|
return "FCP";
|
|
|
|
case SCSI_PROTOCOL_ISCSI:
|
|
|
|
return "iSCSI";
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return "Unknown";
|
|
|
|
}
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static void
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_do_plug(struct vhost_scsi_tpg *tpg,
|
2013-05-06 02:38:27 -06:00
|
|
|
struct se_lun *lun, bool plug)
|
2013-04-25 01:35:21 -06:00
|
|
|
{
|
|
|
|
|
|
|
|
struct vhost_scsi *vs = tpg->vhost_scsi;
|
|
|
|
struct vhost_virtqueue *vq;
|
|
|
|
u32 reason;
|
|
|
|
|
|
|
|
if (!vs)
|
|
|
|
return;
|
|
|
|
|
|
|
|
mutex_lock(&vs->dev.mutex);
|
|
|
|
|
|
|
|
if (plug)
|
|
|
|
reason = VIRTIO_SCSI_EVT_RESET_RESCAN;
|
|
|
|
else
|
|
|
|
reason = VIRTIO_SCSI_EVT_RESET_REMOVED;
|
|
|
|
|
2013-04-26 21:16:48 -06:00
|
|
|
vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq;
|
2013-04-25 01:35:21 -06:00
|
|
|
mutex_lock(&vq->mutex);
|
2014-06-05 06:20:23 -06:00
|
|
|
if (vhost_has_feature(vq, VIRTIO_SCSI_F_HOTPLUG))
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_send_evt(vs, tpg, lun,
|
2014-06-05 06:20:23 -06:00
|
|
|
VIRTIO_SCSI_T_TRANSPORT_RESET, reason);
|
2013-04-25 01:35:21 -06:00
|
|
|
mutex_unlock(&vq->mutex);
|
|
|
|
mutex_unlock(&vs->dev.mutex);
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_hotplug(struct vhost_scsi_tpg *tpg, struct se_lun *lun)
|
2013-04-25 01:35:21 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_do_plug(tpg, lun, true);
|
2013-04-25 01:35:21 -06:00
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_hotunplug(struct vhost_scsi_tpg *tpg, struct se_lun *lun)
|
2013-04-25 01:35:21 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_do_plug(tpg, lun, false);
|
2013-04-25 01:35:21 -06:00
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static int vhost_scsi_port_link(struct se_portal_group *se_tpg,
|
2013-05-06 02:38:27 -06:00
|
|
|
struct se_lun *lun)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tpg *tpg = container_of(se_tpg,
|
|
|
|
struct vhost_scsi_tpg, se_tpg);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_lock(&vhost_scsi_mutex);
|
2013-04-25 01:35:21 -06:00
|
|
|
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_lock(&tpg->tv_tpg_mutex);
|
|
|
|
tpg->tv_tpg_port_count++;
|
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_hotplug(tpg, lun);
|
2013-04-25 01:35:21 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_unlock(&vhost_scsi_mutex);
|
2013-04-25 01:35:21 -06:00
|
|
|
|
2012-07-18 15:31:32 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_port_unlink(struct se_portal_group *se_tpg,
|
2013-05-06 02:38:27 -06:00
|
|
|
struct se_lun *lun)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tpg *tpg = container_of(se_tpg,
|
|
|
|
struct vhost_scsi_tpg, se_tpg);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_lock(&vhost_scsi_mutex);
|
2013-04-25 01:35:21 -06:00
|
|
|
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_lock(&tpg->tv_tpg_mutex);
|
|
|
|
tpg->tv_tpg_port_count--;
|
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2013-04-25 01:35:21 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_hotunplug(tpg, lun);
|
2013-04-25 01:35:21 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_unlock(&vhost_scsi_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2016-01-09 06:47:55 -07:00
|
|
|
static void vhost_scsi_free_cmd_map_res(struct se_session *se_sess)
|
2013-06-21 15:32:04 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_cmd *tv_cmd;
|
2013-06-21 15:32:04 -06:00
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
if (!se_sess->sess_cmd_map)
|
|
|
|
return;
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
for (i = 0; i < VHOST_SCSI_DEFAULT_TAGS; i++) {
|
|
|
|
tv_cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[i];
|
2013-06-21 15:32:04 -06:00
|
|
|
|
|
|
|
kfree(tv_cmd->tvc_sgl);
|
2014-02-22 19:08:24 -07:00
|
|
|
kfree(tv_cmd->tvc_prot_sgl);
|
2013-06-21 15:32:04 -06:00
|
|
|
kfree(tv_cmd->tvc_upages);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-10-03 07:32:55 -06:00
|
|
|
static ssize_t vhost_scsi_tpg_attrib_fabric_prot_type_store(
|
|
|
|
struct config_item *item, const char *page, size_t count)
|
2015-03-28 01:03:51 -06:00
|
|
|
{
|
2015-10-03 07:32:55 -06:00
|
|
|
struct se_portal_group *se_tpg = attrib_to_tpg(item);
|
2015-03-28 01:03:51 -06:00
|
|
|
struct vhost_scsi_tpg *tpg = container_of(se_tpg,
|
|
|
|
struct vhost_scsi_tpg, se_tpg);
|
|
|
|
unsigned long val;
|
|
|
|
int ret = kstrtoul(page, 0, &val);
|
|
|
|
|
|
|
|
if (ret) {
|
|
|
|
pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
if (val != 0 && val != 1 && val != 3) {
|
|
|
|
pr_err("Invalid vhost_scsi fabric_prot_type: %lu\n", val);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
tpg->tv_fabric_prot_type = val;
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
2015-10-03 07:32:55 -06:00
|
|
|
static ssize_t vhost_scsi_tpg_attrib_fabric_prot_type_show(
|
|
|
|
struct config_item *item, char *page)
|
2015-03-28 01:03:51 -06:00
|
|
|
{
|
2015-10-03 07:32:55 -06:00
|
|
|
struct se_portal_group *se_tpg = attrib_to_tpg(item);
|
2015-03-28 01:03:51 -06:00
|
|
|
struct vhost_scsi_tpg *tpg = container_of(se_tpg,
|
|
|
|
struct vhost_scsi_tpg, se_tpg);
|
|
|
|
|
|
|
|
return sprintf(page, "%d\n", tpg->tv_fabric_prot_type);
|
|
|
|
}
|
2015-10-03 07:32:55 -06:00
|
|
|
|
|
|
|
CONFIGFS_ATTR(vhost_scsi_tpg_attrib_, fabric_prot_type);
|
2015-03-28 01:03:51 -06:00
|
|
|
|
|
|
|
static struct configfs_attribute *vhost_scsi_tpg_attrib_attrs[] = {
|
2015-10-03 07:32:55 -06:00
|
|
|
&vhost_scsi_tpg_attrib_attr_fabric_prot_type,
|
2015-03-28 01:03:51 -06:00
|
|
|
NULL,
|
|
|
|
};
|
|
|
|
|
2016-01-09 06:47:55 -07:00
|
|
|
static int vhost_scsi_nexus_cb(struct se_portal_group *se_tpg,
|
|
|
|
struct se_session *se_sess, void *p)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_cmd *tv_cmd;
|
2013-06-21 15:32:04 -06:00
|
|
|
unsigned int i;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
for (i = 0; i < VHOST_SCSI_DEFAULT_TAGS; i++) {
|
|
|
|
tv_cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[i];
|
2013-06-21 15:32:04 -06:00
|
|
|
|
treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 15:03:40 -06:00
|
|
|
tv_cmd->tvc_sgl = kcalloc(VHOST_SCSI_PREALLOC_SGLS,
|
|
|
|
sizeof(struct scatterlist),
|
|
|
|
GFP_KERNEL);
|
2013-06-21 15:32:04 -06:00
|
|
|
if (!tv_cmd->tvc_sgl) {
|
|
|
|
pr_err("Unable to allocate tv_cmd->tvc_sgl\n");
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 15:03:40 -06:00
|
|
|
tv_cmd->tvc_upages = kcalloc(VHOST_SCSI_PREALLOC_UPAGES,
|
|
|
|
sizeof(struct page *),
|
|
|
|
GFP_KERNEL);
|
2013-06-21 15:32:04 -06:00
|
|
|
if (!tv_cmd->tvc_upages) {
|
|
|
|
pr_err("Unable to allocate tv_cmd->tvc_upages\n");
|
|
|
|
goto out;
|
|
|
|
}
|
2014-02-22 19:08:24 -07:00
|
|
|
|
treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 15:03:40 -06:00
|
|
|
tv_cmd->tvc_prot_sgl = kcalloc(VHOST_SCSI_PREALLOC_PROT_SGLS,
|
|
|
|
sizeof(struct scatterlist),
|
|
|
|
GFP_KERNEL);
|
2014-02-22 19:08:24 -07:00
|
|
|
if (!tv_cmd->tvc_prot_sgl) {
|
|
|
|
pr_err("Unable to allocate tv_cmd->tvc_prot_sgl\n");
|
|
|
|
goto out;
|
|
|
|
}
|
2013-06-21 15:32:04 -06:00
|
|
|
}
|
2016-01-09 06:47:55 -07:00
|
|
|
return 0;
|
|
|
|
out:
|
|
|
|
vhost_scsi_free_cmd_map_res(se_sess);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vhost_scsi_make_nexus(struct vhost_scsi_tpg *tpg,
|
|
|
|
const char *name)
|
|
|
|
{
|
|
|
|
struct vhost_scsi_nexus *tv_nexus;
|
|
|
|
|
|
|
|
mutex_lock(&tpg->tv_tpg_mutex);
|
|
|
|
if (tpg->tpg_nexus) {
|
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
|
|
|
pr_debug("tpg->tpg_nexus already exists\n");
|
|
|
|
return -EEXIST;
|
|
|
|
}
|
|
|
|
|
2017-05-20 05:48:44 -06:00
|
|
|
tv_nexus = kzalloc(sizeof(*tv_nexus), GFP_KERNEL);
|
2016-01-09 06:47:55 -07:00
|
|
|
if (!tv_nexus) {
|
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
|
|
|
pr_err("Unable to allocate struct vhost_scsi_nexus\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
2012-07-18 15:31:32 -06:00
|
|
|
/*
|
|
|
|
* Since we are running in 'demo mode' this call with generate a
|
2015-02-01 00:56:53 -07:00
|
|
|
* struct se_node_acl for the vhost_scsi struct se_portal_group with
|
2012-07-18 15:31:32 -06:00
|
|
|
* the SCSI Initiator port name of the passed configfs group 'name'.
|
|
|
|
*/
|
2018-08-02 11:12:23 -06:00
|
|
|
tv_nexus->tvn_se_sess = target_setup_session(&tpg->se_tpg,
|
2016-01-09 06:47:55 -07:00
|
|
|
VHOST_SCSI_DEFAULT_TAGS,
|
|
|
|
sizeof(struct vhost_scsi_cmd),
|
|
|
|
TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS,
|
|
|
|
(unsigned char *)name, tv_nexus,
|
|
|
|
vhost_scsi_nexus_cb);
|
|
|
|
if (IS_ERR(tv_nexus->tvn_se_sess)) {
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2016-01-09 06:47:55 -07:00
|
|
|
kfree(tv_nexus);
|
|
|
|
return -ENOMEM;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
2013-05-06 02:38:28 -06:00
|
|
|
tpg->tpg_nexus = tv_nexus;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static int vhost_scsi_drop_nexus(struct vhost_scsi_tpg *tpg)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
struct se_session *se_sess;
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_nexus *tv_nexus;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
mutex_lock(&tpg->tv_tpg_mutex);
|
|
|
|
tv_nexus = tpg->tpg_nexus;
|
|
|
|
if (!tv_nexus) {
|
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
se_sess = tv_nexus->tvn_se_sess;
|
|
|
|
if (!se_sess) {
|
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2012-07-30 14:30:00 -06:00
|
|
|
if (tpg->tv_tpg_port_count != 0) {
|
2012-07-18 15:31:32 -06:00
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2012-07-30 14:30:00 -06:00
|
|
|
pr_err("Unable to remove TCM_vhost I_T Nexus with"
|
2012-07-18 15:31:32 -06:00
|
|
|
" active TPG port count: %d\n",
|
2012-07-30 14:30:00 -06:00
|
|
|
tpg->tv_tpg_port_count);
|
|
|
|
return -EBUSY;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2012-07-30 14:30:00 -06:00
|
|
|
if (tpg->tv_tpg_vhost_count != 0) {
|
2012-07-18 15:31:32 -06:00
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2012-07-30 14:30:00 -06:00
|
|
|
pr_err("Unable to remove TCM_vhost I_T Nexus with"
|
2012-07-18 15:31:32 -06:00
|
|
|
" active TPG vhost count: %d\n",
|
2012-07-30 14:30:00 -06:00
|
|
|
tpg->tv_tpg_vhost_count);
|
|
|
|
return -EBUSY;
|
2012-07-18 15:31:32 -06:00
|
|
|
}
|
|
|
|
|
2012-07-30 14:30:00 -06:00
|
|
|
pr_debug("TCM_vhost_ConfigFS: Removing I_T Nexus to emulated"
|
2015-02-01 00:56:53 -07:00
|
|
|
" %s Initiator Port: %s\n", vhost_scsi_dump_proto_id(tpg->tport),
|
2012-07-18 15:31:32 -06:00
|
|
|
tv_nexus->tvn_se_sess->se_node_acl->initiatorname);
|
2013-06-21 15:32:04 -06:00
|
|
|
|
2016-01-09 06:47:55 -07:00
|
|
|
vhost_scsi_free_cmd_map_res(se_sess);
|
2012-07-18 15:31:32 -06:00
|
|
|
/*
|
2012-07-30 14:30:00 -06:00
|
|
|
* Release the SCSI I_T Nexus to the emulated vhost Target Port
|
2012-07-18 15:31:32 -06:00
|
|
|
*/
|
2018-08-02 11:12:27 -06:00
|
|
|
target_remove_session(se_sess);
|
2012-07-18 15:31:32 -06:00
|
|
|
tpg->tpg_nexus = NULL;
|
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
|
|
|
|
|
|
|
kfree(tv_nexus);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-10-03 07:32:55 -06:00
|
|
|
static ssize_t vhost_scsi_tpg_nexus_show(struct config_item *item, char *page)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-10-03 07:32:55 -06:00
|
|
|
struct se_portal_group *se_tpg = to_tpg(item);
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tpg *tpg = container_of(se_tpg,
|
|
|
|
struct vhost_scsi_tpg, se_tpg);
|
|
|
|
struct vhost_scsi_nexus *tv_nexus;
|
2012-07-18 15:31:32 -06:00
|
|
|
ssize_t ret;
|
|
|
|
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_lock(&tpg->tv_tpg_mutex);
|
|
|
|
tv_nexus = tpg->tpg_nexus;
|
2012-07-18 15:31:32 -06:00
|
|
|
if (!tv_nexus) {
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
ret = snprintf(page, PAGE_SIZE, "%s\n",
|
|
|
|
tv_nexus->tvn_se_sess->se_node_acl->initiatorname);
|
2013-05-06 02:38:28 -06:00
|
|
|
mutex_unlock(&tpg->tv_tpg_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2015-10-03 07:32:55 -06:00
|
|
|
static ssize_t vhost_scsi_tpg_nexus_store(struct config_item *item,
|
|
|
|
const char *page, size_t count)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-10-03 07:32:55 -06:00
|
|
|
struct se_portal_group *se_tpg = to_tpg(item);
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tpg *tpg = container_of(se_tpg,
|
|
|
|
struct vhost_scsi_tpg, se_tpg);
|
|
|
|
struct vhost_scsi_tport *tport_wwn = tpg->tport;
|
|
|
|
unsigned char i_port[VHOST_SCSI_NAMELEN], *ptr, *port_ptr;
|
2012-07-18 15:31:32 -06:00
|
|
|
int ret;
|
|
|
|
/*
|
|
|
|
* Shutdown the active I_T nexus if 'NULL' is passed..
|
|
|
|
*/
|
|
|
|
if (!strncmp(page, "NULL", 4)) {
|
2015-02-01 00:56:53 -07:00
|
|
|
ret = vhost_scsi_drop_nexus(tpg);
|
2012-07-18 15:31:32 -06:00
|
|
|
return (!ret) ? count : ret;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Otherwise make sure the passed virtual Initiator port WWN matches
|
2015-02-01 00:56:53 -07:00
|
|
|
* the fabric protocol_id set in vhost_scsi_make_tport(), and call
|
|
|
|
* vhost_scsi_make_nexus().
|
2012-07-18 15:31:32 -06:00
|
|
|
*/
|
2015-02-01 00:56:53 -07:00
|
|
|
if (strlen(page) >= VHOST_SCSI_NAMELEN) {
|
2012-07-18 15:31:32 -06:00
|
|
|
pr_err("Emulated NAA Sas Address: %s, exceeds"
|
2015-02-01 00:56:53 -07:00
|
|
|
" max: %d\n", page, VHOST_SCSI_NAMELEN);
|
2012-07-18 15:31:32 -06:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
2015-02-01 00:56:53 -07:00
|
|
|
snprintf(&i_port[0], VHOST_SCSI_NAMELEN, "%s", page);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
ptr = strstr(i_port, "naa.");
|
|
|
|
if (ptr) {
|
|
|
|
if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_SAS) {
|
|
|
|
pr_err("Passed SAS Initiator Port %s does not"
|
|
|
|
" match target port protoid: %s\n", i_port,
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_dump_proto_id(tport_wwn));
|
2012-07-18 15:31:32 -06:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
port_ptr = &i_port[0];
|
|
|
|
goto check_newline;
|
|
|
|
}
|
|
|
|
ptr = strstr(i_port, "fc.");
|
|
|
|
if (ptr) {
|
|
|
|
if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_FCP) {
|
|
|
|
pr_err("Passed FCP Initiator Port %s does not"
|
|
|
|
" match target port protoid: %s\n", i_port,
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_dump_proto_id(tport_wwn));
|
2012-07-18 15:31:32 -06:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
port_ptr = &i_port[3]; /* Skip over "fc." */
|
|
|
|
goto check_newline;
|
|
|
|
}
|
|
|
|
ptr = strstr(i_port, "iqn.");
|
|
|
|
if (ptr) {
|
|
|
|
if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_ISCSI) {
|
|
|
|
pr_err("Passed iSCSI Initiator Port %s does not"
|
|
|
|
" match target port protoid: %s\n", i_port,
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_dump_proto_id(tport_wwn));
|
2012-07-18 15:31:32 -06:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
port_ptr = &i_port[0];
|
|
|
|
goto check_newline;
|
|
|
|
}
|
|
|
|
pr_err("Unable to locate prefix for emulated Initiator Port:"
|
|
|
|
" %s\n", i_port);
|
|
|
|
return -EINVAL;
|
|
|
|
/*
|
|
|
|
* Clear any trailing newline for the NAA WWN
|
|
|
|
*/
|
|
|
|
check_newline:
|
|
|
|
if (i_port[strlen(i_port)-1] == '\n')
|
|
|
|
i_port[strlen(i_port)-1] = '\0';
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
ret = vhost_scsi_make_nexus(tpg, port_ptr);
|
2012-07-18 15:31:32 -06:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
2015-10-03 07:32:55 -06:00
|
|
|
CONFIGFS_ATTR(vhost_scsi_tpg_, nexus);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static struct configfs_attribute *vhost_scsi_tpg_attrs[] = {
|
2015-10-03 07:32:55 -06:00
|
|
|
&vhost_scsi_tpg_attr_nexus,
|
2012-07-18 15:31:32 -06:00
|
|
|
NULL,
|
|
|
|
};
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static struct se_portal_group *
|
2018-06-22 15:53:02 -06:00
|
|
|
vhost_scsi_make_tpg(struct se_wwn *wwn, const char *name)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tport *tport = container_of(wwn,
|
|
|
|
struct vhost_scsi_tport, tport_wwn);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tpg *tpg;
|
2015-02-05 00:37:33 -07:00
|
|
|
u16 tpgt;
|
2012-07-18 15:31:32 -06:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (strstr(name, "tpgt_") != name)
|
|
|
|
return ERR_PTR(-EINVAL);
|
2015-02-05 00:37:33 -07:00
|
|
|
if (kstrtou16(name + 5, 10, &tpgt) || tpgt >= VHOST_SCSI_MAX_TARGET)
|
2012-07-18 15:31:32 -06:00
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
2017-05-20 05:48:44 -06:00
|
|
|
tpg = kzalloc(sizeof(*tpg), GFP_KERNEL);
|
2012-07-18 15:31:32 -06:00
|
|
|
if (!tpg) {
|
2015-02-01 00:56:53 -07:00
|
|
|
pr_err("Unable to allocate struct vhost_scsi_tpg");
|
2012-07-18 15:31:32 -06:00
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
}
|
|
|
|
mutex_init(&tpg->tv_tpg_mutex);
|
|
|
|
INIT_LIST_HEAD(&tpg->tv_tpg_list);
|
|
|
|
tpg->tport = tport;
|
|
|
|
tpg->tport_tpgt = tpgt;
|
|
|
|
|
2015-05-20 22:48:03 -06:00
|
|
|
ret = core_tpg_register(wwn, &tpg->se_tpg, tport->tport_proto_id);
|
2012-07-18 15:31:32 -06:00
|
|
|
if (ret < 0) {
|
|
|
|
kfree(tpg);
|
|
|
|
return NULL;
|
|
|
|
}
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_lock(&vhost_scsi_mutex);
|
|
|
|
list_add_tail(&tpg->tv_tpg_list, &vhost_scsi_list);
|
|
|
|
mutex_unlock(&vhost_scsi_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
return &tpg->se_tpg;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_drop_tpg(struct se_portal_group *se_tpg)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tpg *tpg = container_of(se_tpg,
|
|
|
|
struct vhost_scsi_tpg, se_tpg);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_lock(&vhost_scsi_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
list_del(&tpg->tv_tpg_list);
|
2015-02-01 00:56:53 -07:00
|
|
|
mutex_unlock(&vhost_scsi_mutex);
|
2012-07-18 15:31:32 -06:00
|
|
|
/*
|
2012-07-30 14:30:00 -06:00
|
|
|
* Release the virtual I_T Nexus for this vhost TPG
|
2012-07-18 15:31:32 -06:00
|
|
|
*/
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_drop_nexus(tpg);
|
2012-07-18 15:31:32 -06:00
|
|
|
/*
|
|
|
|
* Deregister the se_tpg from TCM..
|
|
|
|
*/
|
|
|
|
core_tpg_deregister(se_tpg);
|
|
|
|
kfree(tpg);
|
|
|
|
}
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static struct se_wwn *
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_make_tport(struct target_fabric_configfs *tf,
|
2013-05-06 02:38:27 -06:00
|
|
|
struct config_group *group,
|
|
|
|
const char *name)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tport *tport;
|
2012-07-18 15:31:32 -06:00
|
|
|
char *ptr;
|
|
|
|
u64 wwpn = 0;
|
|
|
|
int off = 0;
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
/* if (vhost_scsi_parse_wwn(name, &wwpn, 1) < 0)
|
2012-07-18 15:31:32 -06:00
|
|
|
return ERR_PTR(-EINVAL); */
|
|
|
|
|
2017-05-20 05:48:44 -06:00
|
|
|
tport = kzalloc(sizeof(*tport), GFP_KERNEL);
|
2012-07-18 15:31:32 -06:00
|
|
|
if (!tport) {
|
2015-02-01 00:56:53 -07:00
|
|
|
pr_err("Unable to allocate struct vhost_scsi_tport");
|
2012-07-18 15:31:32 -06:00
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
}
|
|
|
|
tport->tport_wwpn = wwpn;
|
|
|
|
/*
|
|
|
|
* Determine the emulated Protocol Identifier and Target Port Name
|
|
|
|
* based on the incoming configfs directory name.
|
|
|
|
*/
|
|
|
|
ptr = strstr(name, "naa.");
|
|
|
|
if (ptr) {
|
|
|
|
tport->tport_proto_id = SCSI_PROTOCOL_SAS;
|
|
|
|
goto check_len;
|
|
|
|
}
|
|
|
|
ptr = strstr(name, "fc.");
|
|
|
|
if (ptr) {
|
|
|
|
tport->tport_proto_id = SCSI_PROTOCOL_FCP;
|
|
|
|
off = 3; /* Skip over "fc." */
|
|
|
|
goto check_len;
|
|
|
|
}
|
|
|
|
ptr = strstr(name, "iqn.");
|
|
|
|
if (ptr) {
|
|
|
|
tport->tport_proto_id = SCSI_PROTOCOL_ISCSI;
|
|
|
|
goto check_len;
|
|
|
|
}
|
|
|
|
|
|
|
|
pr_err("Unable to locate prefix for emulated Target Port:"
|
|
|
|
" %s\n", name);
|
|
|
|
kfree(tport);
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
|
|
|
check_len:
|
2015-02-01 00:56:53 -07:00
|
|
|
if (strlen(name) >= VHOST_SCSI_NAMELEN) {
|
2012-07-18 15:31:32 -06:00
|
|
|
pr_err("Emulated %s Address: %s, exceeds"
|
2015-02-01 00:56:53 -07:00
|
|
|
" max: %d\n", name, vhost_scsi_dump_proto_id(tport),
|
|
|
|
VHOST_SCSI_NAMELEN);
|
2012-07-18 15:31:32 -06:00
|
|
|
kfree(tport);
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
}
|
2015-02-01 00:56:53 -07:00
|
|
|
snprintf(&tport->tport_name[0], VHOST_SCSI_NAMELEN, "%s", &name[off]);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
pr_debug("TCM_VHost_ConfigFS: Allocated emulated Target"
|
2015-02-01 00:56:53 -07:00
|
|
|
" %s Address: %s\n", vhost_scsi_dump_proto_id(tport), name);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
return &tport->tport_wwn;
|
|
|
|
}
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_drop_tport(struct se_wwn *wwn)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-02-01 00:56:53 -07:00
|
|
|
struct vhost_scsi_tport *tport = container_of(wwn,
|
|
|
|
struct vhost_scsi_tport, tport_wwn);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
|
|
|
pr_debug("TCM_VHost_ConfigFS: Deallocating emulated Target"
|
2015-02-01 00:56:53 -07:00
|
|
|
" %s Address: %s\n", vhost_scsi_dump_proto_id(tport),
|
2012-07-18 15:31:32 -06:00
|
|
|
tport->tport_name);
|
|
|
|
|
|
|
|
kfree(tport);
|
|
|
|
}
|
|
|
|
|
2013-05-06 02:38:27 -06:00
|
|
|
static ssize_t
|
2015-10-03 07:32:55 -06:00
|
|
|
vhost_scsi_wwn_version_show(struct config_item *item, char *page)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
|
|
|
return sprintf(page, "TCM_VHOST fabric module %s on %s/%s"
|
2015-02-01 00:56:53 -07:00
|
|
|
"on "UTS_RELEASE"\n", VHOST_SCSI_VERSION, utsname()->sysname,
|
2012-07-18 15:31:32 -06:00
|
|
|
utsname()->machine);
|
|
|
|
}
|
|
|
|
|
2015-10-03 07:32:55 -06:00
|
|
|
CONFIGFS_ATTR_RO(vhost_scsi_wwn_, version);
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static struct configfs_attribute *vhost_scsi_wwn_attrs[] = {
|
2015-10-03 07:32:55 -06:00
|
|
|
&vhost_scsi_wwn_attr_version,
|
2012-07-18 15:31:32 -06:00
|
|
|
NULL,
|
|
|
|
};
|
|
|
|
|
2017-01-09 08:21:02 -07:00
|
|
|
static const struct target_core_fabric_ops vhost_scsi_ops = {
|
2015-04-08 12:01:35 -06:00
|
|
|
.module = THIS_MODULE,
|
2018-11-23 10:36:12 -07:00
|
|
|
.fabric_name = "vhost",
|
2015-02-01 00:56:53 -07:00
|
|
|
.tpg_get_wwn = vhost_scsi_get_fabric_wwn,
|
|
|
|
.tpg_get_tag = vhost_scsi_get_tpgt,
|
|
|
|
.tpg_check_demo_mode = vhost_scsi_check_true,
|
|
|
|
.tpg_check_demo_mode_cache = vhost_scsi_check_true,
|
|
|
|
.tpg_check_demo_mode_write_protect = vhost_scsi_check_false,
|
|
|
|
.tpg_check_prod_mode_write_protect = vhost_scsi_check_false,
|
2015-03-28 01:03:51 -06:00
|
|
|
.tpg_check_prot_fabric_only = vhost_scsi_check_prot_fabric_only,
|
2015-02-01 00:56:53 -07:00
|
|
|
.tpg_get_inst_index = vhost_scsi_tpg_get_inst_index,
|
|
|
|
.release_cmd = vhost_scsi_release_cmd,
|
2013-06-06 03:20:41 -06:00
|
|
|
.check_stop_free = vhost_scsi_check_stop_free,
|
2015-02-01 00:56:53 -07:00
|
|
|
.sess_get_index = vhost_scsi_sess_get_index,
|
2012-07-18 15:31:32 -06:00
|
|
|
.sess_get_initiator_sid = NULL,
|
2015-02-01 00:56:53 -07:00
|
|
|
.write_pending = vhost_scsi_write_pending,
|
|
|
|
.write_pending_status = vhost_scsi_write_pending_status,
|
|
|
|
.set_default_node_attributes = vhost_scsi_set_default_node_attrs,
|
|
|
|
.get_cmd_state = vhost_scsi_get_cmd_state,
|
|
|
|
.queue_data_in = vhost_scsi_queue_data_in,
|
|
|
|
.queue_status = vhost_scsi_queue_status,
|
|
|
|
.queue_tm_rsp = vhost_scsi_queue_tm_rsp,
|
|
|
|
.aborted_task = vhost_scsi_aborted_task,
|
2012-07-18 15:31:32 -06:00
|
|
|
/*
|
|
|
|
* Setup callers for generic logic in target_core_fabric_configfs.c
|
|
|
|
*/
|
2015-02-01 00:56:53 -07:00
|
|
|
.fabric_make_wwn = vhost_scsi_make_tport,
|
|
|
|
.fabric_drop_wwn = vhost_scsi_drop_tport,
|
|
|
|
.fabric_make_tpg = vhost_scsi_make_tpg,
|
|
|
|
.fabric_drop_tpg = vhost_scsi_drop_tpg,
|
|
|
|
.fabric_post_link = vhost_scsi_port_link,
|
|
|
|
.fabric_pre_unlink = vhost_scsi_port_unlink,
|
2015-04-08 12:01:35 -06:00
|
|
|
|
|
|
|
.tfc_wwn_attrs = vhost_scsi_wwn_attrs,
|
|
|
|
.tfc_tpg_base_attrs = vhost_scsi_tpg_attrs,
|
|
|
|
.tfc_tpg_attrib_attrs = vhost_scsi_tpg_attrib_attrs,
|
2012-07-18 15:31:32 -06:00
|
|
|
};
|
|
|
|
|
2015-04-08 12:01:35 -06:00
|
|
|
static int __init vhost_scsi_init(void)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-04-08 12:01:35 -06:00
|
|
|
int ret = -ENOMEM;
|
2012-07-18 15:31:32 -06:00
|
|
|
|
2015-04-08 12:01:35 -06:00
|
|
|
pr_debug("TCM_VHOST fabric module %s on %s/%s"
|
2015-02-01 00:56:53 -07:00
|
|
|
" on "UTS_RELEASE"\n", VHOST_SCSI_VERSION, utsname()->sysname,
|
2012-07-18 15:31:32 -06:00
|
|
|
utsname()->machine);
|
|
|
|
|
2012-07-30 14:30:00 -06:00
|
|
|
/*
|
|
|
|
* Use our own dedicated workqueue for submitting I/O into
|
|
|
|
* target core to avoid contention within system_wq.
|
|
|
|
*/
|
2015-02-01 00:56:53 -07:00
|
|
|
vhost_scsi_workqueue = alloc_workqueue("vhost_scsi", 0, 0);
|
|
|
|
if (!vhost_scsi_workqueue)
|
2012-07-18 15:31:32 -06:00
|
|
|
goto out;
|
|
|
|
|
|
|
|
ret = vhost_scsi_register();
|
|
|
|
if (ret < 0)
|
|
|
|
goto out_destroy_workqueue;
|
|
|
|
|
2015-04-08 12:01:35 -06:00
|
|
|
ret = target_register_template(&vhost_scsi_ops);
|
2012-07-18 15:31:32 -06:00
|
|
|
if (ret < 0)
|
|
|
|
goto out_vhost_scsi_deregister;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_vhost_scsi_deregister:
|
|
|
|
vhost_scsi_deregister();
|
|
|
|
out_destroy_workqueue:
|
2015-02-01 00:56:53 -07:00
|
|
|
destroy_workqueue(vhost_scsi_workqueue);
|
2012-07-18 15:31:32 -06:00
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
};
|
|
|
|
|
2015-02-01 00:56:53 -07:00
|
|
|
static void vhost_scsi_exit(void)
|
2012-07-18 15:31:32 -06:00
|
|
|
{
|
2015-04-08 12:01:35 -06:00
|
|
|
target_unregister_template(&vhost_scsi_ops);
|
2012-07-18 15:31:32 -06:00
|
|
|
vhost_scsi_deregister();
|
2015-02-01 00:56:53 -07:00
|
|
|
destroy_workqueue(vhost_scsi_workqueue);
|
2012-07-18 15:31:32 -06:00
|
|
|
};
|
|
|
|
|
2013-05-01 18:52:59 -06:00
|
|
|
MODULE_DESCRIPTION("VHOST_SCSI series fabric driver");
|
|
|
|
MODULE_ALIAS("tcm_vhost");
|
2012-07-18 15:31:32 -06:00
|
|
|
MODULE_LICENSE("GPL");
|
2015-02-01 00:56:53 -07:00
|
|
|
module_init(vhost_scsi_init);
|
|
|
|
module_exit(vhost_scsi_exit);
|