Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Vhost kernel TCM fabric driver for virtio SCSI initiators |
| 3 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 4 | * (C) Copyright 2010-2013 Datera, Inc. |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 5 | * (C) Copyright 2010-2012 IBM Corp. |
| 6 | * |
| 7 | * Licensed to the Linux Foundation under the General Public License (GPL) version 2. |
| 8 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 9 | * Authors: Nicholas A. Bellinger <nab@daterainc.com> |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 10 | * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | ****************************************************************************/ |
| 23 | |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/moduleparam.h> |
| 26 | #include <generated/utsrelease.h> |
| 27 | #include <linux/utsname.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/kthread.h> |
| 31 | #include <linux/types.h> |
| 32 | #include <linux/string.h> |
| 33 | #include <linux/configfs.h> |
| 34 | #include <linux/ctype.h> |
| 35 | #include <linux/compat.h> |
| 36 | #include <linux/eventfd.h> |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 37 | #include <linux/fs.h> |
| 38 | #include <linux/miscdevice.h> |
| 39 | #include <asm/unaligned.h> |
| 40 | #include <scsi/scsi.h> |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 41 | #include <target/target_core_base.h> |
| 42 | #include <target/target_core_fabric.h> |
| 43 | #include <target/target_core_fabric_configfs.h> |
| 44 | #include <target/target_core_configfs.h> |
| 45 | #include <target/configfs_macros.h> |
| 46 | #include <linux/vhost.h> |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 47 | #include <linux/virtio_scsi.h> |
Asias He | 9d6064a | 2013-01-06 14:36:13 +0800 | [diff] [blame] | 48 | #include <linux/llist.h> |
Asias He | 1b7f390 | 2013-02-06 13:20:59 +0800 | [diff] [blame] | 49 | #include <linux/bitmap.h> |
Nicholas Bellinger | 4824d3b | 2013-06-07 17:47:46 -0700 | [diff] [blame] | 50 | #include <linux/percpu_ida.h> |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 51 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 52 | #include "vhost.h" |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 53 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 54 | #define VHOST_SCSI_VERSION "v0.1" |
| 55 | #define VHOST_SCSI_NAMELEN 256 |
| 56 | #define VHOST_SCSI_MAX_CDB_SIZE 32 |
| 57 | #define VHOST_SCSI_DEFAULT_TAGS 256 |
| 58 | #define VHOST_SCSI_PREALLOC_SGLS 2048 |
| 59 | #define VHOST_SCSI_PREALLOC_UPAGES 2048 |
| 60 | #define VHOST_SCSI_PREALLOC_PROT_SGLS 512 |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 61 | |
| 62 | struct vhost_scsi_inflight { |
| 63 | /* Wait for the flush operation to finish */ |
| 64 | struct completion comp; |
| 65 | /* Refcount for the inflight reqs */ |
| 66 | struct kref kref; |
| 67 | }; |
| 68 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 69 | struct vhost_scsi_cmd { |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 70 | /* Descriptor from vhost_get_vq_desc() for virt_queue segment */ |
| 71 | int tvc_vq_desc; |
| 72 | /* virtio-scsi initiator task attribute */ |
| 73 | int tvc_task_attr; |
Nicholas Bellinger | 79c1414 | 2015-01-27 13:13:12 -0800 | [diff] [blame] | 74 | /* virtio-scsi response incoming iovecs */ |
| 75 | int tvc_in_iovs; |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 76 | /* virtio-scsi initiator data direction */ |
| 77 | enum dma_data_direction tvc_data_direction; |
| 78 | /* Expected data transfer length from virtio-scsi header */ |
| 79 | u32 tvc_exp_data_len; |
| 80 | /* The Tag from include/linux/virtio_scsi.h:struct virtio_scsi_cmd_req */ |
| 81 | u64 tvc_tag; |
| 82 | /* The number of scatterlists associated with this cmd */ |
| 83 | u32 tvc_sgl_count; |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 84 | u32 tvc_prot_sgl_count; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 85 | /* Saved unpacked SCSI LUN for vhost_scsi_submission_work() */ |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 86 | u32 tvc_lun; |
| 87 | /* Pointer to the SGL formatted memory from virtio-scsi */ |
| 88 | struct scatterlist *tvc_sgl; |
Nicholas Bellinger | b1935f6 | 2014-02-22 18:08:24 -0800 | [diff] [blame] | 89 | struct scatterlist *tvc_prot_sgl; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 90 | struct page **tvc_upages; |
Nicholas Bellinger | 79c1414 | 2015-01-27 13:13:12 -0800 | [diff] [blame] | 91 | /* Pointer to response header iovec */ |
| 92 | struct iovec *tvc_resp_iov; |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 93 | /* Pointer to vhost_scsi for our device */ |
| 94 | struct vhost_scsi *tvc_vhost; |
| 95 | /* Pointer to vhost_virtqueue for the cmd */ |
| 96 | struct vhost_virtqueue *tvc_vq; |
| 97 | /* Pointer to vhost nexus memory */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 98 | struct vhost_scsi_nexus *tvc_nexus; |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 99 | /* The TCM I/O descriptor that is accessed via container_of() */ |
| 100 | struct se_cmd tvc_se_cmd; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 101 | /* work item used for cmwq dispatch to vhost_scsi_submission_work() */ |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 102 | struct work_struct work; |
| 103 | /* Copy of the incoming SCSI command descriptor block (CDB) */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 104 | unsigned char tvc_cdb[VHOST_SCSI_MAX_CDB_SIZE]; |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 105 | /* Sense buffer that will be mapped into outgoing status */ |
| 106 | unsigned char tvc_sense_buf[TRANSPORT_SENSE_BUFFER]; |
| 107 | /* Completed commands list, serviced from vhost worker thread */ |
| 108 | struct llist_node tvc_completion_list; |
| 109 | /* Used to track inflight cmd */ |
| 110 | struct vhost_scsi_inflight *inflight; |
| 111 | }; |
| 112 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 113 | struct vhost_scsi_nexus { |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 114 | /* Pointer to TCM session for I_T Nexus */ |
| 115 | struct se_session *tvn_se_sess; |
| 116 | }; |
| 117 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 118 | struct vhost_scsi_tpg { |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 119 | /* Vhost port target portal group tag for TCM */ |
| 120 | u16 tport_tpgt; |
| 121 | /* Used to track number of TPG Port/Lun Links wrt to explict I_T Nexus shutdown */ |
| 122 | int tv_tpg_port_count; |
| 123 | /* Used for vhost_scsi device reference to tpg_nexus, protected by tv_tpg_mutex */ |
| 124 | int tv_tpg_vhost_count; |
Nicholas Bellinger | b1d75fe | 2015-03-28 00:03:51 -0700 | [diff] [blame] | 125 | /* Used for enabling T10-PI with legacy devices */ |
| 126 | int tv_fabric_prot_type; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 127 | /* list for vhost_scsi_list */ |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 128 | struct list_head tv_tpg_list; |
| 129 | /* Used to protect access for tpg_nexus */ |
| 130 | struct mutex tv_tpg_mutex; |
| 131 | /* Pointer to the TCM VHost I_T Nexus for this TPG endpoint */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 132 | struct vhost_scsi_nexus *tpg_nexus; |
| 133 | /* Pointer back to vhost_scsi_tport */ |
| 134 | struct vhost_scsi_tport *tport; |
| 135 | /* Returned by vhost_scsi_make_tpg() */ |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 136 | struct se_portal_group se_tpg; |
| 137 | /* Pointer back to vhost_scsi, protected by tv_tpg_mutex */ |
| 138 | struct vhost_scsi *vhost_scsi; |
| 139 | }; |
| 140 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 141 | struct vhost_scsi_tport { |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 142 | /* SCSI protocol the tport is providing */ |
| 143 | u8 tport_proto_id; |
| 144 | /* Binary World Wide unique Port Name for Vhost Target port */ |
| 145 | u64 tport_wwpn; |
| 146 | /* ASCII formatted WWPN for Vhost Target port */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 147 | char tport_name[VHOST_SCSI_NAMELEN]; |
| 148 | /* Returned by vhost_scsi_make_tport() */ |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 149 | struct se_wwn tport_wwn; |
| 150 | }; |
| 151 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 152 | struct vhost_scsi_evt { |
Michael S. Tsirkin | 5012a3a | 2013-05-02 03:50:34 +0300 | [diff] [blame] | 153 | /* event to be sent to guest */ |
| 154 | struct virtio_scsi_event event; |
| 155 | /* event list, serviced from vhost worker thread */ |
| 156 | struct llist_node list; |
| 157 | }; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 158 | |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 159 | enum { |
| 160 | VHOST_SCSI_VQ_CTL = 0, |
| 161 | VHOST_SCSI_VQ_EVT = 1, |
| 162 | VHOST_SCSI_VQ_IO = 2, |
| 163 | }; |
| 164 | |
Michael S. Tsirkin | e72fd72 | 2014-11-23 18:01:34 +0200 | [diff] [blame] | 165 | /* Note: can't set VIRTIO_F_VERSION_1 yet, since that implies ANY_LAYOUT. */ |
Nicholas Bellinger | 5dade71 | 2013-03-27 17:23:41 -0700 | [diff] [blame] | 166 | enum { |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 167 | VHOST_SCSI_FEATURES = VHOST_FEATURES | (1ULL << VIRTIO_SCSI_F_HOTPLUG) | |
Nicholas Bellinger | 664ed90 | 2015-01-28 01:31:52 -0800 | [diff] [blame] | 168 | (1ULL << VIRTIO_SCSI_F_T10_PI) | |
| 169 | (1ULL << VIRTIO_F_ANY_LAYOUT) | |
| 170 | (1ULL << VIRTIO_F_VERSION_1) |
Nicholas Bellinger | 5dade71 | 2013-03-27 17:23:41 -0700 | [diff] [blame] | 171 | }; |
| 172 | |
Asias He | 1b7f390 | 2013-02-06 13:20:59 +0800 | [diff] [blame] | 173 | #define VHOST_SCSI_MAX_TARGET 256 |
| 174 | #define VHOST_SCSI_MAX_VQ 128 |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 175 | #define VHOST_SCSI_MAX_EVENT 128 |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 176 | |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 177 | struct vhost_scsi_virtqueue { |
| 178 | struct vhost_virtqueue vq; |
Michael S. Tsirkin | 3dfbff3 | 2013-04-28 15:38:52 +0300 | [diff] [blame] | 179 | /* |
| 180 | * Reference counting for inflight reqs, used for flush operation. At |
| 181 | * each time, one reference tracks new commands submitted, while we |
| 182 | * wait for another one to reach 0. |
| 183 | */ |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 184 | struct vhost_scsi_inflight inflights[2]; |
Michael S. Tsirkin | 3dfbff3 | 2013-04-28 15:38:52 +0300 | [diff] [blame] | 185 | /* |
| 186 | * Indicate current inflight in use, protected by vq->mutex. |
| 187 | * Writers must also take dev mutex and flush under it. |
| 188 | */ |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 189 | int inflight_idx; |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 190 | }; |
| 191 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 192 | struct vhost_scsi { |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 193 | /* Protected by vhost_scsi->dev.mutex */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 194 | struct vhost_scsi_tpg **vs_tpg; |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 195 | char vs_vhost_wwpn[TRANSPORT_IQN_LEN]; |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 196 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 197 | struct vhost_dev dev; |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 198 | struct vhost_scsi_virtqueue vqs[VHOST_SCSI_MAX_VQ]; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 199 | |
| 200 | struct vhost_work vs_completion_work; /* cmd completion work item */ |
Asias He | 9d6064a | 2013-01-06 14:36:13 +0800 | [diff] [blame] | 201 | struct llist_head vs_completion_list; /* cmd completion queue */ |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 202 | |
| 203 | struct vhost_work vs_event_work; /* evt injection work item */ |
| 204 | struct llist_head vs_event_list; /* evt injection queue */ |
| 205 | |
| 206 | bool vs_events_missed; /* any missed events, protected by vq->mutex */ |
| 207 | int vs_events_nr; /* num of pending events, protected by vq->mutex */ |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 208 | }; |
| 209 | |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 210 | static struct target_core_fabric_ops vhost_scsi_ops; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 211 | static struct workqueue_struct *vhost_scsi_workqueue; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 212 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 213 | /* Global spinlock to protect vhost_scsi TPG list for vhost IOCTL access */ |
| 214 | static DEFINE_MUTEX(vhost_scsi_mutex); |
| 215 | static LIST_HEAD(vhost_scsi_list); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 216 | |
Nicholas Bellinger | b4078b5 | 2015-01-28 13:10:51 -0800 | [diff] [blame] | 217 | static int iov_num_pages(void __user *iov_base, size_t iov_len) |
Asias He | 765b34f | 2013-01-22 11:20:25 +0800 | [diff] [blame] | 218 | { |
Nicholas Bellinger | b4078b5 | 2015-01-28 13:10:51 -0800 | [diff] [blame] | 219 | return (PAGE_ALIGN((unsigned long)iov_base + iov_len) - |
| 220 | ((unsigned long)iov_base & PAGE_MASK)) >> PAGE_SHIFT; |
Asias He | 765b34f | 2013-01-22 11:20:25 +0800 | [diff] [blame] | 221 | } |
| 222 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 223 | static void vhost_scsi_done_inflight(struct kref *kref) |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 224 | { |
| 225 | struct vhost_scsi_inflight *inflight; |
| 226 | |
| 227 | inflight = container_of(kref, struct vhost_scsi_inflight, kref); |
| 228 | complete(&inflight->comp); |
| 229 | } |
| 230 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 231 | static void vhost_scsi_init_inflight(struct vhost_scsi *vs, |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 232 | struct vhost_scsi_inflight *old_inflight[]) |
| 233 | { |
| 234 | struct vhost_scsi_inflight *new_inflight; |
| 235 | struct vhost_virtqueue *vq; |
| 236 | int idx, i; |
| 237 | |
| 238 | for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) { |
| 239 | vq = &vs->vqs[i].vq; |
| 240 | |
| 241 | mutex_lock(&vq->mutex); |
| 242 | |
| 243 | /* store old infight */ |
| 244 | idx = vs->vqs[i].inflight_idx; |
| 245 | if (old_inflight) |
| 246 | old_inflight[i] = &vs->vqs[i].inflights[idx]; |
| 247 | |
| 248 | /* setup new infight */ |
| 249 | vs->vqs[i].inflight_idx = idx ^ 1; |
| 250 | new_inflight = &vs->vqs[i].inflights[idx ^ 1]; |
| 251 | kref_init(&new_inflight->kref); |
| 252 | init_completion(&new_inflight->comp); |
| 253 | |
| 254 | mutex_unlock(&vq->mutex); |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | static struct vhost_scsi_inflight * |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 259 | vhost_scsi_get_inflight(struct vhost_virtqueue *vq) |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 260 | { |
| 261 | struct vhost_scsi_inflight *inflight; |
| 262 | struct vhost_scsi_virtqueue *svq; |
| 263 | |
| 264 | svq = container_of(vq, struct vhost_scsi_virtqueue, vq); |
| 265 | inflight = &svq->inflights[svq->inflight_idx]; |
| 266 | kref_get(&inflight->kref); |
| 267 | |
| 268 | return inflight; |
| 269 | } |
| 270 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 271 | static void vhost_scsi_put_inflight(struct vhost_scsi_inflight *inflight) |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 272 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 273 | kref_put(&inflight->kref, vhost_scsi_done_inflight); |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 274 | } |
| 275 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 276 | static int vhost_scsi_check_true(struct se_portal_group *se_tpg) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 277 | { |
| 278 | return 1; |
| 279 | } |
| 280 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 281 | static int vhost_scsi_check_false(struct se_portal_group *se_tpg) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 282 | { |
| 283 | return 0; |
| 284 | } |
| 285 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 286 | static char *vhost_scsi_get_fabric_name(void) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 287 | { |
| 288 | return "vhost"; |
| 289 | } |
| 290 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 291 | static char *vhost_scsi_get_fabric_wwn(struct se_portal_group *se_tpg) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 292 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 293 | struct vhost_scsi_tpg *tpg = container_of(se_tpg, |
| 294 | struct vhost_scsi_tpg, se_tpg); |
| 295 | struct vhost_scsi_tport *tport = tpg->tport; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 296 | |
| 297 | return &tport->tport_name[0]; |
| 298 | } |
| 299 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 300 | static u16 vhost_scsi_get_tpgt(struct se_portal_group *se_tpg) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 301 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 302 | struct vhost_scsi_tpg *tpg = container_of(se_tpg, |
| 303 | struct vhost_scsi_tpg, se_tpg); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 304 | return tpg->tport_tpgt; |
| 305 | } |
| 306 | |
Nicholas Bellinger | b1d75fe | 2015-03-28 00:03:51 -0700 | [diff] [blame] | 307 | static int vhost_scsi_check_prot_fabric_only(struct se_portal_group *se_tpg) |
| 308 | { |
| 309 | struct vhost_scsi_tpg *tpg = container_of(se_tpg, |
| 310 | struct vhost_scsi_tpg, se_tpg); |
| 311 | |
| 312 | return tpg->tv_fabric_prot_type; |
| 313 | } |
| 314 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 315 | static u32 vhost_scsi_tpg_get_inst_index(struct se_portal_group *se_tpg) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 316 | { |
| 317 | return 1; |
| 318 | } |
| 319 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 320 | static void vhost_scsi_release_cmd(struct se_cmd *se_cmd) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 321 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 322 | struct vhost_scsi_cmd *tv_cmd = container_of(se_cmd, |
| 323 | struct vhost_scsi_cmd, tvc_se_cmd); |
Nicholas Bellinger | de1419e | 2015-01-29 17:21:13 -0800 | [diff] [blame] | 324 | struct se_session *se_sess = tv_cmd->tvc_nexus->tvn_se_sess; |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 325 | int i; |
Nicholas Bellinger | 084ed45 | 2013-06-06 02:20:41 -0700 | [diff] [blame] | 326 | |
| 327 | if (tv_cmd->tvc_sgl_count) { |
Nicholas Bellinger | 084ed45 | 2013-06-06 02:20:41 -0700 | [diff] [blame] | 328 | for (i = 0; i < tv_cmd->tvc_sgl_count; i++) |
| 329 | put_page(sg_page(&tv_cmd->tvc_sgl[i])); |
Michael S. Tsirkin | d3d665a | 2013-09-17 22:54:31 +0300 | [diff] [blame] | 330 | } |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 331 | if (tv_cmd->tvc_prot_sgl_count) { |
| 332 | for (i = 0; i < tv_cmd->tvc_prot_sgl_count; i++) |
| 333 | put_page(sg_page(&tv_cmd->tvc_prot_sgl[i])); |
| 334 | } |
Nicholas Bellinger | 084ed45 | 2013-06-06 02:20:41 -0700 | [diff] [blame] | 335 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 336 | vhost_scsi_put_inflight(tv_cmd->inflight); |
Nicholas Bellinger | 4824d3b | 2013-06-07 17:47:46 -0700 | [diff] [blame] | 337 | percpu_ida_free(&se_sess->sess_tag_pool, se_cmd->map_tag); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 338 | } |
| 339 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 340 | static int vhost_scsi_shutdown_session(struct se_session *se_sess) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 341 | { |
| 342 | return 0; |
| 343 | } |
| 344 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 345 | static void vhost_scsi_close_session(struct se_session *se_sess) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 346 | { |
| 347 | return; |
| 348 | } |
| 349 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 350 | static u32 vhost_scsi_sess_get_index(struct se_session *se_sess) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 351 | { |
| 352 | return 0; |
| 353 | } |
| 354 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 355 | static int vhost_scsi_write_pending(struct se_cmd *se_cmd) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 356 | { |
| 357 | /* Go ahead and process the write immediately */ |
| 358 | target_execute_cmd(se_cmd); |
| 359 | return 0; |
| 360 | } |
| 361 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 362 | static int vhost_scsi_write_pending_status(struct se_cmd *se_cmd) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 363 | { |
| 364 | return 0; |
| 365 | } |
| 366 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 367 | static void vhost_scsi_set_default_node_attrs(struct se_node_acl *nacl) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 368 | { |
| 369 | return; |
| 370 | } |
| 371 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 372 | static int vhost_scsi_get_cmd_state(struct se_cmd *se_cmd) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 373 | { |
| 374 | return 0; |
| 375 | } |
| 376 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 377 | static void vhost_scsi_complete_cmd(struct vhost_scsi_cmd *cmd) |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 378 | { |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 379 | struct vhost_scsi *vs = cmd->tvc_vhost; |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 380 | |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 381 | llist_add(&cmd->tvc_completion_list, &vs->vs_completion_list); |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 382 | |
| 383 | vhost_work_queue(&vs->dev, &vs->vs_completion_work); |
| 384 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 385 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 386 | static int vhost_scsi_queue_data_in(struct se_cmd *se_cmd) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 387 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 388 | struct vhost_scsi_cmd *cmd = container_of(se_cmd, |
| 389 | struct vhost_scsi_cmd, tvc_se_cmd); |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 390 | vhost_scsi_complete_cmd(cmd); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 391 | return 0; |
| 392 | } |
| 393 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 394 | static int vhost_scsi_queue_status(struct se_cmd *se_cmd) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 395 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 396 | struct vhost_scsi_cmd *cmd = container_of(se_cmd, |
| 397 | struct vhost_scsi_cmd, tvc_se_cmd); |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 398 | vhost_scsi_complete_cmd(cmd); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 399 | return 0; |
| 400 | } |
| 401 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 402 | static void vhost_scsi_queue_tm_rsp(struct se_cmd *se_cmd) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 403 | { |
Joern Engel | b79fafa | 2013-07-03 11:22:17 -0400 | [diff] [blame] | 404 | return; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 405 | } |
| 406 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 407 | static void vhost_scsi_aborted_task(struct se_cmd *se_cmd) |
Nicholas Bellinger | 131e6ab | 2014-03-22 14:55:56 -0700 | [diff] [blame] | 408 | { |
| 409 | return; |
| 410 | } |
| 411 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 412 | static void vhost_scsi_free_evt(struct vhost_scsi *vs, struct vhost_scsi_evt *evt) |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 413 | { |
| 414 | vs->vs_events_nr--; |
| 415 | kfree(evt); |
| 416 | } |
| 417 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 418 | static struct vhost_scsi_evt * |
| 419 | vhost_scsi_allocate_evt(struct vhost_scsi *vs, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 420 | u32 event, u32 reason) |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 421 | { |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 422 | struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 423 | struct vhost_scsi_evt *evt; |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 424 | |
| 425 | if (vs->vs_events_nr > VHOST_SCSI_MAX_EVENT) { |
| 426 | vs->vs_events_missed = true; |
| 427 | return NULL; |
| 428 | } |
| 429 | |
| 430 | evt = kzalloc(sizeof(*evt), GFP_KERNEL); |
| 431 | if (!evt) { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 432 | vq_err(vq, "Failed to allocate vhost_scsi_evt\n"); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 433 | vs->vs_events_missed = true; |
| 434 | return NULL; |
| 435 | } |
| 436 | |
Michael S. Tsirkin | e72fd72 | 2014-11-23 18:01:34 +0200 | [diff] [blame] | 437 | evt->event.event = cpu_to_vhost32(vq, event); |
| 438 | evt->event.reason = cpu_to_vhost32(vq, reason); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 439 | vs->vs_events_nr++; |
| 440 | |
| 441 | return evt; |
| 442 | } |
| 443 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 444 | static void vhost_scsi_free_cmd(struct vhost_scsi_cmd *cmd) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 445 | { |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 446 | struct se_cmd *se_cmd = &cmd->tvc_se_cmd; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 447 | |
| 448 | /* TODO locking against target/backend threads? */ |
Nicholas Bellinger | 6c131d0 | 2013-06-06 01:44:48 -0700 | [diff] [blame] | 449 | transport_generic_free_cmd(se_cmd, 0); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 450 | |
Nicholas Bellinger | 084ed45 | 2013-06-06 02:20:41 -0700 | [diff] [blame] | 451 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 452 | |
Nicholas Bellinger | 084ed45 | 2013-06-06 02:20:41 -0700 | [diff] [blame] | 453 | static int vhost_scsi_check_stop_free(struct se_cmd *se_cmd) |
| 454 | { |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 455 | return target_put_sess_cmd(se_cmd); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 456 | } |
| 457 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 458 | static void |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 459 | vhost_scsi_do_evt_work(struct vhost_scsi *vs, struct vhost_scsi_evt *evt) |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 460 | { |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 461 | struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq; |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 462 | struct virtio_scsi_event *event = &evt->event; |
| 463 | struct virtio_scsi_event __user *eventp; |
| 464 | unsigned out, in; |
| 465 | int head, ret; |
| 466 | |
| 467 | if (!vq->private_data) { |
| 468 | vs->vs_events_missed = true; |
| 469 | return; |
| 470 | } |
| 471 | |
| 472 | again: |
| 473 | vhost_disable_notify(&vs->dev, vq); |
Michael S. Tsirkin | 47283be | 2014-06-05 15:20:27 +0300 | [diff] [blame] | 474 | head = vhost_get_vq_desc(vq, vq->iov, |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 475 | ARRAY_SIZE(vq->iov), &out, &in, |
| 476 | NULL, NULL); |
| 477 | if (head < 0) { |
| 478 | vs->vs_events_missed = true; |
| 479 | return; |
| 480 | } |
| 481 | if (head == vq->num) { |
| 482 | if (vhost_enable_notify(&vs->dev, vq)) |
| 483 | goto again; |
| 484 | vs->vs_events_missed = true; |
| 485 | return; |
| 486 | } |
| 487 | |
| 488 | if ((vq->iov[out].iov_len != sizeof(struct virtio_scsi_event))) { |
| 489 | vq_err(vq, "Expecting virtio_scsi_event, got %zu bytes\n", |
| 490 | vq->iov[out].iov_len); |
| 491 | vs->vs_events_missed = true; |
| 492 | return; |
| 493 | } |
| 494 | |
| 495 | if (vs->vs_events_missed) { |
Michael S. Tsirkin | e72fd72 | 2014-11-23 18:01:34 +0200 | [diff] [blame] | 496 | event->event |= cpu_to_vhost32(vq, VIRTIO_SCSI_T_EVENTS_MISSED); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 497 | vs->vs_events_missed = false; |
| 498 | } |
| 499 | |
| 500 | eventp = vq->iov[out].iov_base; |
| 501 | ret = __copy_to_user(eventp, event, sizeof(*event)); |
| 502 | if (!ret) |
| 503 | vhost_add_used_and_signal(&vs->dev, vq, head, 0); |
| 504 | else |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 505 | vq_err(vq, "Faulted on vhost_scsi_send_event\n"); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 506 | } |
| 507 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 508 | static void vhost_scsi_evt_work(struct vhost_work *work) |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 509 | { |
| 510 | struct vhost_scsi *vs = container_of(work, struct vhost_scsi, |
| 511 | vs_event_work); |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 512 | struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 513 | struct vhost_scsi_evt *evt; |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 514 | struct llist_node *llnode; |
| 515 | |
| 516 | mutex_lock(&vq->mutex); |
| 517 | llnode = llist_del_all(&vs->vs_event_list); |
| 518 | while (llnode) { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 519 | evt = llist_entry(llnode, struct vhost_scsi_evt, list); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 520 | llnode = llist_next(llnode); |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 521 | vhost_scsi_do_evt_work(vs, evt); |
| 522 | vhost_scsi_free_evt(vs, evt); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 523 | } |
| 524 | mutex_unlock(&vq->mutex); |
| 525 | } |
| 526 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 527 | /* Fill in status and signal that we are done processing this command |
| 528 | * |
| 529 | * This is scheduled in the vhost work queue so we are called with the owner |
| 530 | * process mm and can access the vring. |
| 531 | */ |
| 532 | static void vhost_scsi_complete_cmd_work(struct vhost_work *work) |
| 533 | { |
| 534 | struct vhost_scsi *vs = container_of(work, struct vhost_scsi, |
| 535 | vs_completion_work); |
Asias He | 1b7f390 | 2013-02-06 13:20:59 +0800 | [diff] [blame] | 536 | DECLARE_BITMAP(signal, VHOST_SCSI_MAX_VQ); |
Asias He | 9d6064a | 2013-01-06 14:36:13 +0800 | [diff] [blame] | 537 | struct virtio_scsi_cmd_resp v_rsp; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 538 | struct vhost_scsi_cmd *cmd; |
Asias He | 9d6064a | 2013-01-06 14:36:13 +0800 | [diff] [blame] | 539 | struct llist_node *llnode; |
| 540 | struct se_cmd *se_cmd; |
Nicholas Bellinger | 79c1414 | 2015-01-27 13:13:12 -0800 | [diff] [blame] | 541 | struct iov_iter iov_iter; |
Asias He | 1b7f390 | 2013-02-06 13:20:59 +0800 | [diff] [blame] | 542 | int ret, vq; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 543 | |
Asias He | 1b7f390 | 2013-02-06 13:20:59 +0800 | [diff] [blame] | 544 | bitmap_zero(signal, VHOST_SCSI_MAX_VQ); |
Asias He | 9d6064a | 2013-01-06 14:36:13 +0800 | [diff] [blame] | 545 | llnode = llist_del_all(&vs->vs_completion_list); |
| 546 | while (llnode) { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 547 | cmd = llist_entry(llnode, struct vhost_scsi_cmd, |
Asias He | 9d6064a | 2013-01-06 14:36:13 +0800 | [diff] [blame] | 548 | tvc_completion_list); |
| 549 | llnode = llist_next(llnode); |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 550 | se_cmd = &cmd->tvc_se_cmd; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 551 | |
| 552 | pr_debug("%s tv_cmd %p resid %u status %#02x\n", __func__, |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 553 | cmd, se_cmd->residual_count, se_cmd->scsi_status); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 554 | |
| 555 | memset(&v_rsp, 0, sizeof(v_rsp)); |
Michael S. Tsirkin | e72fd72 | 2014-11-23 18:01:34 +0200 | [diff] [blame] | 556 | v_rsp.resid = cpu_to_vhost32(cmd->tvc_vq, se_cmd->residual_count); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 557 | /* TODO is status_qualifier field needed? */ |
| 558 | v_rsp.status = se_cmd->scsi_status; |
Michael S. Tsirkin | e72fd72 | 2014-11-23 18:01:34 +0200 | [diff] [blame] | 559 | v_rsp.sense_len = cpu_to_vhost32(cmd->tvc_vq, |
| 560 | se_cmd->scsi_sense_length); |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 561 | memcpy(v_rsp.sense, cmd->tvc_sense_buf, |
Michael S. Tsirkin | e72fd72 | 2014-11-23 18:01:34 +0200 | [diff] [blame] | 562 | se_cmd->scsi_sense_length); |
Nicholas Bellinger | 79c1414 | 2015-01-27 13:13:12 -0800 | [diff] [blame] | 563 | |
| 564 | iov_iter_init(&iov_iter, READ, cmd->tvc_resp_iov, |
| 565 | cmd->tvc_in_iovs, sizeof(v_rsp)); |
| 566 | ret = copy_to_iter(&v_rsp, sizeof(v_rsp), &iov_iter); |
| 567 | if (likely(ret == sizeof(v_rsp))) { |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 568 | struct vhost_scsi_virtqueue *q; |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 569 | vhost_add_used(cmd->tvc_vq, cmd->tvc_vq_desc, 0); |
| 570 | q = container_of(cmd->tvc_vq, struct vhost_scsi_virtqueue, vq); |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 571 | vq = q - vs->vqs; |
Asias He | 1b7f390 | 2013-02-06 13:20:59 +0800 | [diff] [blame] | 572 | __set_bit(vq, signal); |
| 573 | } else |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 574 | pr_err("Faulted on virtio_scsi_cmd_resp\n"); |
| 575 | |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 576 | vhost_scsi_free_cmd(cmd); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 577 | } |
| 578 | |
Asias He | 1b7f390 | 2013-02-06 13:20:59 +0800 | [diff] [blame] | 579 | vq = -1; |
| 580 | while ((vq = find_next_bit(signal, VHOST_SCSI_MAX_VQ, vq + 1)) |
| 581 | < VHOST_SCSI_MAX_VQ) |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 582 | vhost_signal(&vs->dev, &vs->vqs[vq].vq); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 583 | } |
| 584 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 585 | static struct vhost_scsi_cmd * |
| 586 | vhost_scsi_get_tag(struct vhost_virtqueue *vq, struct vhost_scsi_tpg *tpg, |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 587 | unsigned char *cdb, u64 scsi_tag, u16 lun, u8 task_attr, |
| 588 | u32 exp_data_len, int data_direction) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 589 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 590 | struct vhost_scsi_cmd *cmd; |
| 591 | struct vhost_scsi_nexus *tv_nexus; |
Nicholas Bellinger | 4824d3b | 2013-06-07 17:47:46 -0700 | [diff] [blame] | 592 | struct se_session *se_sess; |
Nicholas Bellinger | b1935f6 | 2014-02-22 18:08:24 -0800 | [diff] [blame] | 593 | struct scatterlist *sg, *prot_sg; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 594 | struct page **pages; |
Nicholas Bellinger | 4824d3b | 2013-06-07 17:47:46 -0700 | [diff] [blame] | 595 | int tag; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 596 | |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 597 | tv_nexus = tpg->tpg_nexus; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 598 | if (!tv_nexus) { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 599 | pr_err("Unable to locate active struct vhost_scsi_nexus\n"); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 600 | return ERR_PTR(-EIO); |
| 601 | } |
Nicholas Bellinger | 4824d3b | 2013-06-07 17:47:46 -0700 | [diff] [blame] | 602 | se_sess = tv_nexus->tvn_se_sess; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 603 | |
Kent Overstreet | 6f6b5d1 | 2014-01-19 08:26:37 +0000 | [diff] [blame] | 604 | tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING); |
Nicholas Bellinger | 4a47d3a | 2013-09-23 11:42:28 -0700 | [diff] [blame] | 605 | if (tag < 0) { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 606 | pr_err("Unable to obtain tag for vhost_scsi_cmd\n"); |
Nicholas Bellinger | 4a47d3a | 2013-09-23 11:42:28 -0700 | [diff] [blame] | 607 | return ERR_PTR(-ENOMEM); |
| 608 | } |
| 609 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 610 | cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[tag]; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 611 | sg = cmd->tvc_sgl; |
Nicholas Bellinger | b1935f6 | 2014-02-22 18:08:24 -0800 | [diff] [blame] | 612 | prot_sg = cmd->tvc_prot_sgl; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 613 | pages = cmd->tvc_upages; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 614 | memset(cmd, 0, sizeof(struct vhost_scsi_cmd)); |
Nicholas Bellinger | 4824d3b | 2013-06-07 17:47:46 -0700 | [diff] [blame] | 615 | |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 616 | cmd->tvc_sgl = sg; |
Nicholas Bellinger | b1935f6 | 2014-02-22 18:08:24 -0800 | [diff] [blame] | 617 | cmd->tvc_prot_sgl = prot_sg; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 618 | cmd->tvc_upages = pages; |
Nicholas Bellinger | 4824d3b | 2013-06-07 17:47:46 -0700 | [diff] [blame] | 619 | cmd->tvc_se_cmd.map_tag = tag; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 620 | cmd->tvc_tag = scsi_tag; |
| 621 | cmd->tvc_lun = lun; |
| 622 | cmd->tvc_task_attr = task_attr; |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 623 | cmd->tvc_exp_data_len = exp_data_len; |
| 624 | cmd->tvc_data_direction = data_direction; |
| 625 | cmd->tvc_nexus = tv_nexus; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 626 | cmd->inflight = vhost_scsi_get_inflight(vq); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 627 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 628 | memcpy(cmd->tvc_cdb, cdb, VHOST_SCSI_MAX_CDB_SIZE); |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 629 | |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 630 | return cmd; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | /* |
| 634 | * Map a user memory range into a scatterlist |
| 635 | * |
| 636 | * Returns the number of scatterlist entries used or -errno on error. |
| 637 | */ |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 638 | static int |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 639 | vhost_scsi_map_to_sgl(struct vhost_scsi_cmd *cmd, |
Nicholas Bellinger | b4078b5 | 2015-01-28 13:10:51 -0800 | [diff] [blame] | 640 | void __user *ptr, |
| 641 | size_t len, |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 642 | struct scatterlist *sgl, |
Nicholas Bellinger | 5a01d08 | 2014-02-22 18:34:08 -0800 | [diff] [blame] | 643 | bool write) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 644 | { |
Nicholas Bellinger | b4078b5 | 2015-01-28 13:10:51 -0800 | [diff] [blame] | 645 | unsigned int npages = 0, offset, nbytes; |
| 646 | unsigned int pages_nr = iov_num_pages(ptr, len); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 647 | struct scatterlist *sg = sgl; |
Nicholas Bellinger | b4078b5 | 2015-01-28 13:10:51 -0800 | [diff] [blame] | 648 | struct page **pages = cmd->tvc_upages; |
Asias He | 1810053 | 2013-01-22 11:20:27 +0800 | [diff] [blame] | 649 | int ret, i; |
| 650 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 651 | if (pages_nr > VHOST_SCSI_PREALLOC_UPAGES) { |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 652 | pr_err("vhost_scsi_map_to_sgl() pages_nr: %u greater than" |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 653 | " preallocated VHOST_SCSI_PREALLOC_UPAGES: %u\n", |
| 654 | pages_nr, VHOST_SCSI_PREALLOC_UPAGES); |
Nicholas Bellinger | 5a01d08 | 2014-02-22 18:34:08 -0800 | [diff] [blame] | 655 | return -ENOBUFS; |
| 656 | } |
Asias He | 1810053 | 2013-01-22 11:20:27 +0800 | [diff] [blame] | 657 | |
| 658 | ret = get_user_pages_fast((unsigned long)ptr, pages_nr, write, pages); |
| 659 | /* No pages were pinned */ |
| 660 | if (ret < 0) |
| 661 | goto out; |
| 662 | /* Less pages pinned than wanted */ |
| 663 | if (ret != pages_nr) { |
| 664 | for (i = 0; i < ret; i++) |
| 665 | put_page(pages[i]); |
| 666 | ret = -EFAULT; |
| 667 | goto out; |
| 668 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 669 | |
| 670 | while (len > 0) { |
Asias He | 1810053 | 2013-01-22 11:20:27 +0800 | [diff] [blame] | 671 | offset = (uintptr_t)ptr & ~PAGE_MASK; |
| 672 | nbytes = min_t(unsigned int, PAGE_SIZE - offset, len); |
| 673 | sg_set_page(sg, pages[npages], nbytes, offset); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 674 | ptr += nbytes; |
| 675 | len -= nbytes; |
| 676 | sg++; |
| 677 | npages++; |
| 678 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 679 | |
Asias He | 1810053 | 2013-01-22 11:20:27 +0800 | [diff] [blame] | 680 | out: |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 681 | return ret; |
| 682 | } |
| 683 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 684 | static int |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 685 | vhost_scsi_calc_sgls(struct iov_iter *iter, size_t bytes, int max_sgls) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 686 | { |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 687 | int sgl_count = 0; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 688 | |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 689 | if (!iter || !iter->iov) { |
| 690 | pr_err("%s: iter->iov is NULL, but expected bytes: %zu" |
| 691 | " present\n", __func__, bytes); |
| 692 | return -EINVAL; |
Nicholas Bellinger | 5a01d08 | 2014-02-22 18:34:08 -0800 | [diff] [blame] | 693 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 694 | |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 695 | sgl_count = iov_iter_npages(iter, 0xffff); |
| 696 | if (sgl_count > max_sgls) { |
| 697 | pr_err("%s: requested sgl_count: %d exceeds pre-allocated" |
| 698 | " max_sgls: %d\n", __func__, sgl_count, max_sgls); |
| 699 | return -EINVAL; |
| 700 | } |
| 701 | return sgl_count; |
| 702 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 703 | |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 704 | static int |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 705 | vhost_scsi_iov_to_sgl(struct vhost_scsi_cmd *cmd, bool write, |
| 706 | struct iov_iter *iter, |
| 707 | struct scatterlist *sg, int sg_count) |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 708 | { |
| 709 | size_t off = iter->iov_offset; |
| 710 | int i, ret; |
Nicholas Bellinger | 5a01d08 | 2014-02-22 18:34:08 -0800 | [diff] [blame] | 711 | |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 712 | for (i = 0; i < iter->nr_segs; i++) { |
| 713 | void __user *base = iter->iov[i].iov_base + off; |
| 714 | size_t len = iter->iov[i].iov_len - off; |
| 715 | |
| 716 | ret = vhost_scsi_map_to_sgl(cmd, base, len, sg, write); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 717 | if (ret < 0) { |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 718 | for (i = 0; i < sg_count; i++) { |
| 719 | struct page *page = sg_page(&sg[i]); |
| 720 | if (page) |
| 721 | put_page(page); |
| 722 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 723 | return ret; |
| 724 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 725 | sg += ret; |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 726 | off = 0; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 727 | } |
| 728 | return 0; |
| 729 | } |
| 730 | |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 731 | static int |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 732 | vhost_scsi_mapal(struct vhost_scsi_cmd *cmd, |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 733 | size_t prot_bytes, struct iov_iter *prot_iter, |
| 734 | size_t data_bytes, struct iov_iter *data_iter) |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 735 | { |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 736 | int sgl_count, ret; |
| 737 | bool write = (cmd->tvc_data_direction == DMA_FROM_DEVICE); |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 738 | |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 739 | if (prot_bytes) { |
| 740 | sgl_count = vhost_scsi_calc_sgls(prot_iter, prot_bytes, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 741 | VHOST_SCSI_PREALLOC_PROT_SGLS); |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 742 | if (sgl_count < 0) |
| 743 | return sgl_count; |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 744 | |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 745 | sg_init_table(cmd->tvc_prot_sgl, sgl_count); |
| 746 | cmd->tvc_prot_sgl_count = sgl_count; |
| 747 | pr_debug("%s prot_sg %p prot_sgl_count %u\n", __func__, |
| 748 | cmd->tvc_prot_sgl, cmd->tvc_prot_sgl_count); |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 749 | |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 750 | ret = vhost_scsi_iov_to_sgl(cmd, write, prot_iter, |
| 751 | cmd->tvc_prot_sgl, |
| 752 | cmd->tvc_prot_sgl_count); |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 753 | if (ret < 0) { |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 754 | cmd->tvc_prot_sgl_count = 0; |
| 755 | return ret; |
| 756 | } |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 757 | } |
| 758 | sgl_count = vhost_scsi_calc_sgls(data_iter, data_bytes, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 759 | VHOST_SCSI_PREALLOC_SGLS); |
Nicholas Bellinger | e8de56b | 2015-01-28 00:15:00 -0800 | [diff] [blame] | 760 | if (sgl_count < 0) |
| 761 | return sgl_count; |
| 762 | |
| 763 | sg_init_table(cmd->tvc_sgl, sgl_count); |
| 764 | cmd->tvc_sgl_count = sgl_count; |
| 765 | pr_debug("%s data_sg %p data_sgl_count %u\n", __func__, |
| 766 | cmd->tvc_sgl, cmd->tvc_sgl_count); |
| 767 | |
| 768 | ret = vhost_scsi_iov_to_sgl(cmd, write, data_iter, |
| 769 | cmd->tvc_sgl, cmd->tvc_sgl_count); |
| 770 | if (ret < 0) { |
| 771 | cmd->tvc_sgl_count = 0; |
| 772 | return ret; |
Nicholas Bellinger | e31885d | 2014-02-22 18:34:43 -0800 | [diff] [blame] | 773 | } |
| 774 | return 0; |
| 775 | } |
| 776 | |
Nicholas Bellinger | 4624386 | 2014-12-21 10:42:08 -0800 | [diff] [blame] | 777 | static int vhost_scsi_to_tcm_attr(int attr) |
| 778 | { |
| 779 | switch (attr) { |
| 780 | case VIRTIO_SCSI_S_SIMPLE: |
| 781 | return TCM_SIMPLE_TAG; |
| 782 | case VIRTIO_SCSI_S_ORDERED: |
| 783 | return TCM_ORDERED_TAG; |
| 784 | case VIRTIO_SCSI_S_HEAD: |
| 785 | return TCM_HEAD_TAG; |
| 786 | case VIRTIO_SCSI_S_ACA: |
| 787 | return TCM_ACA_TAG; |
| 788 | default: |
| 789 | break; |
| 790 | } |
| 791 | return TCM_SIMPLE_TAG; |
| 792 | } |
| 793 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 794 | static void vhost_scsi_submission_work(struct work_struct *work) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 795 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 796 | struct vhost_scsi_cmd *cmd = |
| 797 | container_of(work, struct vhost_scsi_cmd, work); |
| 798 | struct vhost_scsi_nexus *tv_nexus; |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 799 | struct se_cmd *se_cmd = &cmd->tvc_se_cmd; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 800 | struct scatterlist *sg_ptr, *sg_prot_ptr = NULL; |
| 801 | int rc; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 802 | |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 803 | /* FIXME: BIDI operation */ |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 804 | if (cmd->tvc_sgl_count) { |
| 805 | sg_ptr = cmd->tvc_sgl; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 806 | |
| 807 | if (cmd->tvc_prot_sgl_count) |
| 808 | sg_prot_ptr = cmd->tvc_prot_sgl; |
| 809 | else |
| 810 | se_cmd->prot_pto = true; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 811 | } else { |
| 812 | sg_ptr = NULL; |
| 813 | } |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 814 | tv_nexus = cmd->tvc_nexus; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 815 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame^] | 816 | se_cmd->tag = 0; |
Nicholas Bellinger | 9f0abc1 | 2012-10-01 18:40:55 -0700 | [diff] [blame] | 817 | rc = target_submit_cmd_map_sgls(se_cmd, tv_nexus->tvn_se_sess, |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 818 | cmd->tvc_cdb, &cmd->tvc_sense_buf[0], |
| 819 | cmd->tvc_lun, cmd->tvc_exp_data_len, |
Nicholas Bellinger | 4624386 | 2014-12-21 10:42:08 -0800 | [diff] [blame] | 820 | vhost_scsi_to_tcm_attr(cmd->tvc_task_attr), |
| 821 | cmd->tvc_data_direction, TARGET_SCF_ACK_KREF, |
| 822 | sg_ptr, cmd->tvc_sgl_count, NULL, 0, sg_prot_ptr, |
| 823 | cmd->tvc_prot_sgl_count); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 824 | if (rc < 0) { |
| 825 | transport_send_check_condition_and_sense(se_cmd, |
Nicholas Bellinger | 9f0abc1 | 2012-10-01 18:40:55 -0700 | [diff] [blame] | 826 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 827 | transport_generic_free_cmd(se_cmd, 0); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 828 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 829 | } |
| 830 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 831 | static void |
| 832 | vhost_scsi_send_bad_target(struct vhost_scsi *vs, |
| 833 | struct vhost_virtqueue *vq, |
| 834 | int head, unsigned out) |
Asias He | 637ab21 | 2013-04-10 15:06:15 +0800 | [diff] [blame] | 835 | { |
| 836 | struct virtio_scsi_cmd_resp __user *resp; |
| 837 | struct virtio_scsi_cmd_resp rsp; |
| 838 | int ret; |
| 839 | |
| 840 | memset(&rsp, 0, sizeof(rsp)); |
| 841 | rsp.response = VIRTIO_SCSI_S_BAD_TARGET; |
| 842 | resp = vq->iov[out].iov_base; |
| 843 | ret = __copy_to_user(resp, &rsp, sizeof(rsp)); |
| 844 | if (!ret) |
| 845 | vhost_add_used_and_signal(&vs->dev, vq, head, 0); |
| 846 | else |
| 847 | pr_err("Faulted on virtio_scsi_cmd_resp\n"); |
| 848 | } |
| 849 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 850 | static void |
| 851 | vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 852 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 853 | struct vhost_scsi_tpg **vs_tpg, *tpg; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 854 | struct virtio_scsi_cmd_req v_req; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 855 | struct virtio_scsi_cmd_req_pi v_req_pi; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 856 | struct vhost_scsi_cmd *cmd; |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 857 | struct iov_iter out_iter, in_iter, prot_iter, data_iter; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 858 | u64 tag; |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 859 | u32 exp_data_len, data_direction; |
| 860 | unsigned out, in; |
| 861 | int head, ret, prot_bytes; |
| 862 | size_t req_size, rsp_size = sizeof(struct virtio_scsi_cmd_resp); |
| 863 | size_t out_size, in_size; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 864 | u16 lun; |
| 865 | u8 *target, *lunp, task_attr; |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 866 | bool t10_pi = vhost_has_feature(vq, VIRTIO_SCSI_F_T10_PI); |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 867 | void *req, *cdb; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 868 | |
Asias He | e780221 | 2013-05-07 14:54:35 +0800 | [diff] [blame] | 869 | mutex_lock(&vq->mutex); |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 870 | /* |
| 871 | * We can handle the vq only after the endpoint is setup by calling the |
| 872 | * VHOST_SCSI_SET_ENDPOINT ioctl. |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 873 | */ |
Asias He | e780221 | 2013-05-07 14:54:35 +0800 | [diff] [blame] | 874 | vs_tpg = vq->private_data; |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 875 | if (!vs_tpg) |
Asias He | e780221 | 2013-05-07 14:54:35 +0800 | [diff] [blame] | 876 | goto out; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 877 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 878 | vhost_disable_notify(&vs->dev, vq); |
| 879 | |
| 880 | for (;;) { |
Michael S. Tsirkin | 47283be | 2014-06-05 15:20:27 +0300 | [diff] [blame] | 881 | head = vhost_get_vq_desc(vq, vq->iov, |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 882 | ARRAY_SIZE(vq->iov), &out, &in, |
| 883 | NULL, NULL); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 884 | pr_debug("vhost_get_vq_desc: head: %d, out: %u in: %u\n", |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 885 | head, out, in); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 886 | /* On error, stop handling until the next kick. */ |
| 887 | if (unlikely(head < 0)) |
| 888 | break; |
| 889 | /* Nothing new? Wait for eventfd to tell us they refilled. */ |
| 890 | if (head == vq->num) { |
| 891 | if (unlikely(vhost_enable_notify(&vs->dev, vq))) { |
| 892 | vhost_disable_notify(&vs->dev, vq); |
| 893 | continue; |
| 894 | } |
| 895 | break; |
| 896 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 897 | /* |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 898 | * Check for a sane response buffer so we can report early |
| 899 | * errors back to the guest. |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 900 | */ |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 901 | if (unlikely(vq->iov[out].iov_len < rsp_size)) { |
| 902 | vq_err(vq, "Expecting at least virtio_scsi_cmd_resp" |
| 903 | " size, got %zu bytes\n", vq->iov[out].iov_len); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 904 | break; |
| 905 | } |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 906 | /* |
| 907 | * Setup pointers and values based upon different virtio-scsi |
| 908 | * request header if T10_PI is enabled in KVM guest. |
| 909 | */ |
| 910 | if (t10_pi) { |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 911 | req = &v_req_pi; |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 912 | req_size = sizeof(v_req_pi); |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 913 | lunp = &v_req_pi.lun[0]; |
| 914 | target = &v_req_pi.lun[1]; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 915 | } else { |
| 916 | req = &v_req; |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 917 | req_size = sizeof(v_req); |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 918 | lunp = &v_req.lun[0]; |
| 919 | target = &v_req.lun[1]; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 920 | } |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 921 | /* |
| 922 | * FIXME: Not correct for BIDI operation |
| 923 | */ |
| 924 | out_size = iov_length(vq->iov, out); |
| 925 | in_size = iov_length(&vq->iov[out], in); |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 926 | |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 927 | /* |
| 928 | * Copy over the virtio-scsi request header, which for a |
| 929 | * ANY_LAYOUT enabled guest may span multiple iovecs, or a |
| 930 | * single iovec may contain both the header + outgoing |
| 931 | * WRITE payloads. |
| 932 | * |
| 933 | * copy_from_iter() will advance out_iter, so that it will |
| 934 | * point at the start of the outgoing WRITE payload, if |
| 935 | * DMA_TO_DEVICE is set. |
| 936 | */ |
| 937 | iov_iter_init(&out_iter, WRITE, vq->iov, out, out_size); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 938 | |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 939 | ret = copy_from_iter(req, req_size, &out_iter); |
| 940 | if (unlikely(ret != req_size)) { |
| 941 | vq_err(vq, "Faulted on copy_from_iter\n"); |
Nicholas Bellinger | de1419e | 2015-01-29 17:21:13 -0800 | [diff] [blame] | 942 | vhost_scsi_send_bad_target(vs, vq, head, out); |
| 943 | continue; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 944 | } |
Venkatesh Srinivas | 7fe412d | 2014-02-24 14:13:32 -0800 | [diff] [blame] | 945 | /* virtio-scsi spec requires byte 0 of the lun to be 1 */ |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 946 | if (unlikely(*lunp != 1)) { |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 947 | vq_err(vq, "Illegal virtio-scsi lun: %u\n", *lunp); |
Venkatesh Srinivas | 7fe412d | 2014-02-24 14:13:32 -0800 | [diff] [blame] | 948 | vhost_scsi_send_bad_target(vs, vq, head, out); |
| 949 | continue; |
| 950 | } |
| 951 | |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 952 | tpg = ACCESS_ONCE(vs_tpg[*target]); |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 953 | if (unlikely(!tpg)) { |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 954 | /* Target does not exist, fail the request */ |
Asias He | 637ab21 | 2013-04-10 15:06:15 +0800 | [diff] [blame] | 955 | vhost_scsi_send_bad_target(vs, vq, head, out); |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 956 | continue; |
| 957 | } |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 958 | /* |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 959 | * Determine data_direction by calculating the total outgoing |
| 960 | * iovec sizes + incoming iovec sizes vs. virtio-scsi request + |
| 961 | * response headers respectively. |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 962 | * |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 963 | * For DMA_TO_DEVICE this is out_iter, which is already pointing |
| 964 | * to the right place. |
| 965 | * |
| 966 | * For DMA_FROM_DEVICE, the iovec will be just past the end |
| 967 | * of the virtio-scsi response header in either the same |
| 968 | * or immediately following iovec. |
| 969 | * |
| 970 | * Any associated T10_PI bytes for the outgoing / incoming |
| 971 | * payloads are included in calculation of exp_data_len here. |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 972 | */ |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 973 | prot_bytes = 0; |
| 974 | |
| 975 | if (out_size > req_size) { |
| 976 | data_direction = DMA_TO_DEVICE; |
| 977 | exp_data_len = out_size - req_size; |
| 978 | data_iter = out_iter; |
| 979 | } else if (in_size > rsp_size) { |
| 980 | data_direction = DMA_FROM_DEVICE; |
| 981 | exp_data_len = in_size - rsp_size; |
| 982 | |
| 983 | iov_iter_init(&in_iter, READ, &vq->iov[out], in, |
| 984 | rsp_size + exp_data_len); |
| 985 | iov_iter_advance(&in_iter, rsp_size); |
| 986 | data_iter = in_iter; |
| 987 | } else { |
| 988 | data_direction = DMA_NONE; |
| 989 | exp_data_len = 0; |
| 990 | } |
| 991 | /* |
| 992 | * If T10_PI header + payload is present, setup prot_iter values |
| 993 | * and recalculate data_iter for vhost_scsi_mapal() mapping to |
| 994 | * host scatterlists via get_user_pages_fast(). |
| 995 | */ |
| 996 | if (t10_pi) { |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 997 | if (v_req_pi.pi_bytesout) { |
| 998 | if (data_direction != DMA_TO_DEVICE) { |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 999 | vq_err(vq, "Received non zero pi_bytesout," |
| 1000 | " but wrong data_direction\n"); |
Nicholas Bellinger | de1419e | 2015-01-29 17:21:13 -0800 | [diff] [blame] | 1001 | vhost_scsi_send_bad_target(vs, vq, head, out); |
| 1002 | continue; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1003 | } |
Michael S. Tsirkin | e72fd72 | 2014-11-23 18:01:34 +0200 | [diff] [blame] | 1004 | prot_bytes = vhost32_to_cpu(vq, v_req_pi.pi_bytesout); |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1005 | } else if (v_req_pi.pi_bytesin) { |
| 1006 | if (data_direction != DMA_FROM_DEVICE) { |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 1007 | vq_err(vq, "Received non zero pi_bytesin," |
| 1008 | " but wrong data_direction\n"); |
Nicholas Bellinger | de1419e | 2015-01-29 17:21:13 -0800 | [diff] [blame] | 1009 | vhost_scsi_send_bad_target(vs, vq, head, out); |
| 1010 | continue; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1011 | } |
Michael S. Tsirkin | e72fd72 | 2014-11-23 18:01:34 +0200 | [diff] [blame] | 1012 | prot_bytes = vhost32_to_cpu(vq, v_req_pi.pi_bytesin); |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1013 | } |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 1014 | /* |
| 1015 | * Set prot_iter to data_iter, and advance past any |
| 1016 | * preceeding prot_bytes that may be present. |
| 1017 | * |
| 1018 | * Also fix up the exp_data_len to reflect only the |
| 1019 | * actual data payload length. |
| 1020 | */ |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1021 | if (prot_bytes) { |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 1022 | exp_data_len -= prot_bytes; |
| 1023 | prot_iter = data_iter; |
| 1024 | iov_iter_advance(&data_iter, prot_bytes); |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1025 | } |
Michael S. Tsirkin | e72fd72 | 2014-11-23 18:01:34 +0200 | [diff] [blame] | 1026 | tag = vhost64_to_cpu(vq, v_req_pi.tag); |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1027 | task_attr = v_req_pi.task_attr; |
| 1028 | cdb = &v_req_pi.cdb[0]; |
| 1029 | lun = ((v_req_pi.lun[2] << 8) | v_req_pi.lun[3]) & 0x3FFF; |
| 1030 | } else { |
Michael S. Tsirkin | e72fd72 | 2014-11-23 18:01:34 +0200 | [diff] [blame] | 1031 | tag = vhost64_to_cpu(vq, v_req.tag); |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1032 | task_attr = v_req.task_attr; |
| 1033 | cdb = &v_req.cdb[0]; |
| 1034 | lun = ((v_req.lun[2] << 8) | v_req.lun[3]) & 0x3FFF; |
| 1035 | } |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1036 | /* |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 1037 | * Check that the received CDB size does not exceeded our |
| 1038 | * hardcoded max for vhost-scsi, then get a pre-allocated |
| 1039 | * cmd descriptor for the new virtio-scsi tag. |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1040 | * |
| 1041 | * TODO what if cdb was too small for varlen cdb header? |
| 1042 | */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1043 | if (unlikely(scsi_command_size(cdb) > VHOST_SCSI_MAX_CDB_SIZE)) { |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1044 | vq_err(vq, "Received SCSI CDB with command_size: %d that" |
| 1045 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1046 | scsi_command_size(cdb), VHOST_SCSI_MAX_CDB_SIZE); |
Nicholas Bellinger | de1419e | 2015-01-29 17:21:13 -0800 | [diff] [blame] | 1047 | vhost_scsi_send_bad_target(vs, vq, head, out); |
| 1048 | continue; |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1049 | } |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1050 | cmd = vhost_scsi_get_tag(vq, tpg, cdb, tag, lun, task_attr, |
Nicholas Bellinger | 9f977ef | 2014-06-10 01:19:38 -0700 | [diff] [blame] | 1051 | exp_data_len + prot_bytes, |
| 1052 | data_direction); |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 1053 | if (IS_ERR(cmd)) { |
Nicholas Bellinger | 4824d3b | 2013-06-07 17:47:46 -0700 | [diff] [blame] | 1054 | vq_err(vq, "vhost_scsi_get_tag failed %ld\n", |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 1055 | PTR_ERR(cmd)); |
Nicholas Bellinger | de1419e | 2015-01-29 17:21:13 -0800 | [diff] [blame] | 1056 | vhost_scsi_send_bad_target(vs, vq, head, out); |
| 1057 | continue; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1058 | } |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 1059 | cmd->tvc_vhost = vs; |
| 1060 | cmd->tvc_vq = vq; |
Nicholas Bellinger | 79c1414 | 2015-01-27 13:13:12 -0800 | [diff] [blame] | 1061 | cmd->tvc_resp_iov = &vq->iov[out]; |
| 1062 | cmd->tvc_in_iovs = in; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1063 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1064 | pr_debug("vhost_scsi got command opcode: %#02x, lun: %d\n", |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 1065 | cmd->tvc_cdb[0], cmd->tvc_lun); |
| 1066 | pr_debug("cmd: %p exp_data_len: %d, prot_bytes: %d data_direction:" |
| 1067 | " %d\n", cmd, exp_data_len, prot_bytes, data_direction); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1068 | |
| 1069 | if (data_direction != DMA_NONE) { |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 1070 | ret = vhost_scsi_mapal(cmd, |
| 1071 | prot_bytes, &prot_iter, |
| 1072 | exp_data_len, &data_iter); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1073 | if (unlikely(ret)) { |
| 1074 | vq_err(vq, "Failed to map iov to sgl\n"); |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1075 | vhost_scsi_release_cmd(&cmd->tvc_se_cmd); |
Nicholas Bellinger | de1419e | 2015-01-29 17:21:13 -0800 | [diff] [blame] | 1076 | vhost_scsi_send_bad_target(vs, vq, head, out); |
| 1077 | continue; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1078 | } |
| 1079 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1080 | /* |
| 1081 | * Save the descriptor from vhost_get_vq_desc() to be used to |
| 1082 | * complete the virtio-scsi request in TCM callback context via |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 1083 | * vhost_scsi_queue_data_in() and vhost_scsi_queue_status() |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1084 | */ |
Asias He | 3c63f66 | 2013-05-06 16:38:29 +0800 | [diff] [blame] | 1085 | cmd->tvc_vq_desc = head; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1086 | /* |
Nicholas Bellinger | 09b13fa | 2015-01-25 21:14:58 -0800 | [diff] [blame] | 1087 | * Dispatch cmd descriptor for cmwq execution in process |
| 1088 | * context provided by vhost_scsi_workqueue. This also ensures |
| 1089 | * cmd is executed on the same kworker CPU as this vhost |
| 1090 | * thread to gain positive L2 cache locality effects. |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1091 | */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1092 | INIT_WORK(&cmd->work, vhost_scsi_submission_work); |
| 1093 | queue_work(vhost_scsi_workqueue, &cmd->work); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1094 | } |
Asias He | e780221 | 2013-05-07 14:54:35 +0800 | [diff] [blame] | 1095 | out: |
Asias He | 7ea206c | 2013-04-10 15:06:14 +0800 | [diff] [blame] | 1096 | mutex_unlock(&vq->mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1097 | } |
| 1098 | |
| 1099 | static void vhost_scsi_ctl_handle_kick(struct vhost_work *work) |
| 1100 | { |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1101 | pr_debug("%s: The handling func for control queue.\n", __func__); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1102 | } |
| 1103 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1104 | static void |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1105 | vhost_scsi_send_evt(struct vhost_scsi *vs, |
| 1106 | struct vhost_scsi_tpg *tpg, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1107 | struct se_lun *lun, |
| 1108 | u32 event, |
| 1109 | u32 reason) |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1110 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1111 | struct vhost_scsi_evt *evt; |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1112 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1113 | evt = vhost_scsi_allocate_evt(vs, event, reason); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1114 | if (!evt) |
| 1115 | return; |
| 1116 | |
| 1117 | if (tpg && lun) { |
| 1118 | /* TODO: share lun setup code with virtio-scsi.ko */ |
| 1119 | /* |
| 1120 | * Note: evt->event is zeroed when we allocate it and |
| 1121 | * lun[4-7] need to be zero according to virtio-scsi spec. |
| 1122 | */ |
| 1123 | evt->event.lun[0] = 0x01; |
Dan Carpenter | 59c816c | 2015-02-05 10:37:33 +0300 | [diff] [blame] | 1124 | evt->event.lun[1] = tpg->tport_tpgt; |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1125 | if (lun->unpacked_lun >= 256) |
| 1126 | evt->event.lun[2] = lun->unpacked_lun >> 8 | 0x40 ; |
| 1127 | evt->event.lun[3] = lun->unpacked_lun & 0xFF; |
| 1128 | } |
| 1129 | |
| 1130 | llist_add(&evt->list, &vs->vs_event_list); |
| 1131 | vhost_work_queue(&vs->dev, &vs->vs_event_work); |
| 1132 | } |
| 1133 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1134 | static void vhost_scsi_evt_handle_kick(struct vhost_work *work) |
| 1135 | { |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1136 | struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue, |
| 1137 | poll.work); |
| 1138 | struct vhost_scsi *vs = container_of(vq->dev, struct vhost_scsi, dev); |
| 1139 | |
| 1140 | mutex_lock(&vq->mutex); |
| 1141 | if (!vq->private_data) |
| 1142 | goto out; |
| 1143 | |
| 1144 | if (vs->vs_events_missed) |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1145 | vhost_scsi_send_evt(vs, NULL, NULL, VIRTIO_SCSI_T_NO_EVENT, 0); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1146 | out: |
| 1147 | mutex_unlock(&vq->mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1148 | } |
| 1149 | |
| 1150 | static void vhost_scsi_handle_kick(struct vhost_work *work) |
| 1151 | { |
| 1152 | struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue, |
| 1153 | poll.work); |
| 1154 | struct vhost_scsi *vs = container_of(vq->dev, struct vhost_scsi, dev); |
| 1155 | |
Asias He | 1b7f390 | 2013-02-06 13:20:59 +0800 | [diff] [blame] | 1156 | vhost_scsi_handle_vq(vs, vq); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1157 | } |
| 1158 | |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1159 | static void vhost_scsi_flush_vq(struct vhost_scsi *vs, int index) |
| 1160 | { |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1161 | vhost_poll_flush(&vs->vqs[index].vq.poll); |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1162 | } |
| 1163 | |
Michael S. Tsirkin | 3dfbff3 | 2013-04-28 15:38:52 +0300 | [diff] [blame] | 1164 | /* Callers must hold dev mutex */ |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1165 | static void vhost_scsi_flush(struct vhost_scsi *vs) |
| 1166 | { |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 1167 | struct vhost_scsi_inflight *old_inflight[VHOST_SCSI_MAX_VQ]; |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1168 | int i; |
| 1169 | |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 1170 | /* Init new inflight and remember the old inflight */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1171 | vhost_scsi_init_inflight(vs, old_inflight); |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 1172 | |
| 1173 | /* |
| 1174 | * The inflight->kref was initialized to 1. We decrement it here to |
| 1175 | * indicate the start of the flush operation so that it will reach 0 |
| 1176 | * when all the reqs are finished. |
| 1177 | */ |
| 1178 | for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1179 | kref_put(&old_inflight[i]->kref, vhost_scsi_done_inflight); |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 1180 | |
| 1181 | /* Flush both the vhost poll and vhost work */ |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1182 | for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) |
| 1183 | vhost_scsi_flush_vq(vs, i); |
| 1184 | vhost_work_flush(&vs->dev, &vs->vs_completion_work); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1185 | vhost_work_flush(&vs->dev, &vs->vs_event_work); |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 1186 | |
| 1187 | /* Wait for all reqs issued before the flush to be finished */ |
| 1188 | for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) |
| 1189 | wait_for_completion(&old_inflight[i]->comp); |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1190 | } |
| 1191 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1192 | /* |
| 1193 | * Called from vhost_scsi_ioctl() context to walk the list of available |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1194 | * vhost_scsi_tpg with an active struct vhost_scsi_nexus |
Asias He | f2b7daf | 2013-04-25 15:35:20 +0800 | [diff] [blame] | 1195 | * |
| 1196 | * The lock nesting rule is: |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1197 | * vhost_scsi_mutex -> vs->dev.mutex -> tpg->tv_tpg_mutex -> vq->mutex |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1198 | */ |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1199 | static int |
| 1200 | vhost_scsi_set_endpoint(struct vhost_scsi *vs, |
| 1201 | struct vhost_scsi_target *t) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1202 | { |
Nicholas Bellinger | ab8edab | 2014-10-08 06:19:20 +0000 | [diff] [blame] | 1203 | struct se_portal_group *se_tpg; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1204 | struct vhost_scsi_tport *tv_tport; |
| 1205 | struct vhost_scsi_tpg *tpg; |
| 1206 | struct vhost_scsi_tpg **vs_tpg; |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1207 | struct vhost_virtqueue *vq; |
| 1208 | int index, ret, i, len; |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1209 | bool match = false; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1210 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1211 | mutex_lock(&vhost_scsi_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1212 | mutex_lock(&vs->dev.mutex); |
Asias He | f2b7daf | 2013-04-25 15:35:20 +0800 | [diff] [blame] | 1213 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1214 | /* Verify that ring has been setup correctly. */ |
| 1215 | for (index = 0; index < vs->dev.nvqs; ++index) { |
| 1216 | /* Verify that ring has been setup correctly. */ |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1217 | if (!vhost_vq_access_ok(&vs->vqs[index].vq)) { |
Asias He | f2b7daf | 2013-04-25 15:35:20 +0800 | [diff] [blame] | 1218 | ret = -EFAULT; |
| 1219 | goto out; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1220 | } |
| 1221 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1222 | |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1223 | len = sizeof(vs_tpg[0]) * VHOST_SCSI_MAX_TARGET; |
| 1224 | vs_tpg = kzalloc(len, GFP_KERNEL); |
| 1225 | if (!vs_tpg) { |
Asias He | f2b7daf | 2013-04-25 15:35:20 +0800 | [diff] [blame] | 1226 | ret = -ENOMEM; |
| 1227 | goto out; |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1228 | } |
| 1229 | if (vs->vs_tpg) |
| 1230 | memcpy(vs_tpg, vs->vs_tpg, len); |
| 1231 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1232 | list_for_each_entry(tpg, &vhost_scsi_list, tv_tpg_list) { |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1233 | mutex_lock(&tpg->tv_tpg_mutex); |
| 1234 | if (!tpg->tpg_nexus) { |
| 1235 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1236 | continue; |
| 1237 | } |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1238 | if (tpg->tv_tpg_vhost_count != 0) { |
| 1239 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1240 | continue; |
| 1241 | } |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1242 | tv_tport = tpg->tport; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1243 | |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1244 | if (!strcmp(tv_tport->tport_name, t->vhost_wwpn)) { |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1245 | if (vs->vs_tpg && vs->vs_tpg[tpg->tport_tpgt]) { |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1246 | kfree(vs_tpg); |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1247 | mutex_unlock(&tpg->tv_tpg_mutex); |
Asias He | f2b7daf | 2013-04-25 15:35:20 +0800 | [diff] [blame] | 1248 | ret = -EEXIST; |
| 1249 | goto out; |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1250 | } |
Nicholas Bellinger | ab8edab | 2014-10-08 06:19:20 +0000 | [diff] [blame] | 1251 | /* |
| 1252 | * In order to ensure individual vhost-scsi configfs |
| 1253 | * groups cannot be removed while in use by vhost ioctl, |
| 1254 | * go ahead and take an explicit se_tpg->tpg_group.cg_item |
| 1255 | * dependency now. |
| 1256 | */ |
| 1257 | se_tpg = &tpg->se_tpg; |
Christoph Hellwig | d588cf8 | 2015-05-03 08:50:52 +0200 | [diff] [blame] | 1258 | ret = target_depend_item(&se_tpg->tpg_group.cg_item); |
Nicholas Bellinger | ab8edab | 2014-10-08 06:19:20 +0000 | [diff] [blame] | 1259 | if (ret) { |
| 1260 | pr_warn("configfs_depend_item() failed: %d\n", ret); |
| 1261 | kfree(vs_tpg); |
| 1262 | mutex_unlock(&tpg->tv_tpg_mutex); |
| 1263 | goto out; |
| 1264 | } |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1265 | tpg->tv_tpg_vhost_count++; |
| 1266 | tpg->vhost_scsi = vs; |
| 1267 | vs_tpg[tpg->tport_tpgt] = tpg; |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1268 | smp_mb__after_atomic(); |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1269 | match = true; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1270 | } |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1271 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1272 | } |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1273 | |
| 1274 | if (match) { |
| 1275 | memcpy(vs->vs_vhost_wwpn, t->vhost_wwpn, |
| 1276 | sizeof(vs->vs_vhost_wwpn)); |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1277 | for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) { |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1278 | vq = &vs->vqs[i].vq; |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1279 | mutex_lock(&vq->mutex); |
Asias He | 22fa90c | 2013-05-07 14:54:36 +0800 | [diff] [blame] | 1280 | vq->private_data = vs_tpg; |
Asias He | dfd5d56 | 2013-04-03 14:17:38 +0800 | [diff] [blame] | 1281 | vhost_init_used(vq); |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1282 | mutex_unlock(&vq->mutex); |
| 1283 | } |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1284 | ret = 0; |
| 1285 | } else { |
| 1286 | ret = -EEXIST; |
| 1287 | } |
| 1288 | |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1289 | /* |
| 1290 | * Act as synchronize_rcu to make sure access to |
| 1291 | * old vs->vs_tpg is finished. |
| 1292 | */ |
| 1293 | vhost_scsi_flush(vs); |
| 1294 | kfree(vs->vs_tpg); |
| 1295 | vs->vs_tpg = vs_tpg; |
| 1296 | |
Asias He | f2b7daf | 2013-04-25 15:35:20 +0800 | [diff] [blame] | 1297 | out: |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1298 | mutex_unlock(&vs->dev.mutex); |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1299 | mutex_unlock(&vhost_scsi_mutex); |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1300 | return ret; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1301 | } |
| 1302 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1303 | static int |
| 1304 | vhost_scsi_clear_endpoint(struct vhost_scsi *vs, |
| 1305 | struct vhost_scsi_target *t) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1306 | { |
Nicholas Bellinger | ab8edab | 2014-10-08 06:19:20 +0000 | [diff] [blame] | 1307 | struct se_portal_group *se_tpg; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1308 | struct vhost_scsi_tport *tv_tport; |
| 1309 | struct vhost_scsi_tpg *tpg; |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1310 | struct vhost_virtqueue *vq; |
| 1311 | bool match = false; |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1312 | int index, ret, i; |
| 1313 | u8 target; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1314 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1315 | mutex_lock(&vhost_scsi_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1316 | mutex_lock(&vs->dev.mutex); |
| 1317 | /* Verify that ring has been setup correctly. */ |
| 1318 | for (index = 0; index < vs->dev.nvqs; ++index) { |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1319 | if (!vhost_vq_access_ok(&vs->vqs[index].vq)) { |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1320 | ret = -EFAULT; |
Asias He | 038e0af | 2013-03-15 09:14:05 +0800 | [diff] [blame] | 1321 | goto err_dev; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1322 | } |
| 1323 | } |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1324 | |
| 1325 | if (!vs->vs_tpg) { |
Asias He | f2b7daf | 2013-04-25 15:35:20 +0800 | [diff] [blame] | 1326 | ret = 0; |
| 1327 | goto err_dev; |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1328 | } |
| 1329 | |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1330 | for (i = 0; i < VHOST_SCSI_MAX_TARGET; i++) { |
| 1331 | target = i; |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1332 | tpg = vs->vs_tpg[target]; |
| 1333 | if (!tpg) |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1334 | continue; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1335 | |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1336 | mutex_lock(&tpg->tv_tpg_mutex); |
| 1337 | tv_tport = tpg->tport; |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1338 | if (!tv_tport) { |
| 1339 | ret = -ENODEV; |
Asias He | 038e0af | 2013-03-15 09:14:05 +0800 | [diff] [blame] | 1340 | goto err_tpg; |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1341 | } |
| 1342 | |
| 1343 | if (strcmp(tv_tport->tport_name, t->vhost_wwpn)) { |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1344 | pr_warn("tv_tport->tport_name: %s, tpg->tport_tpgt: %hu" |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1345 | " does not match t->vhost_wwpn: %s, t->vhost_tpgt: %hu\n", |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1346 | tv_tport->tport_name, tpg->tport_tpgt, |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1347 | t->vhost_wwpn, t->vhost_tpgt); |
| 1348 | ret = -EINVAL; |
Asias He | 038e0af | 2013-03-15 09:14:05 +0800 | [diff] [blame] | 1349 | goto err_tpg; |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1350 | } |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1351 | tpg->tv_tpg_vhost_count--; |
| 1352 | tpg->vhost_scsi = NULL; |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1353 | vs->vs_tpg[target] = NULL; |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1354 | match = true; |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1355 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | ab8edab | 2014-10-08 06:19:20 +0000 | [diff] [blame] | 1356 | /* |
| 1357 | * Release se_tpg->tpg_group.cg_item configfs dependency now |
| 1358 | * to allow vhost-scsi WWPN se_tpg->tpg_group shutdown to occur. |
| 1359 | */ |
| 1360 | se_tpg = &tpg->se_tpg; |
Christoph Hellwig | d588cf8 | 2015-05-03 08:50:52 +0200 | [diff] [blame] | 1361 | target_undepend_item(&se_tpg->tpg_group.cg_item); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1362 | } |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1363 | if (match) { |
| 1364 | for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) { |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1365 | vq = &vs->vqs[i].vq; |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1366 | mutex_lock(&vq->mutex); |
Asias He | 22fa90c | 2013-05-07 14:54:36 +0800 | [diff] [blame] | 1367 | vq->private_data = NULL; |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1368 | mutex_unlock(&vq->mutex); |
| 1369 | } |
| 1370 | } |
| 1371 | /* |
| 1372 | * Act as synchronize_rcu to make sure access to |
| 1373 | * old vs->vs_tpg is finished. |
| 1374 | */ |
| 1375 | vhost_scsi_flush(vs); |
| 1376 | kfree(vs->vs_tpg); |
| 1377 | vs->vs_tpg = NULL; |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1378 | WARN_ON(vs->vs_events_nr); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1379 | mutex_unlock(&vs->dev.mutex); |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1380 | mutex_unlock(&vhost_scsi_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1381 | return 0; |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1382 | |
Asias He | 038e0af | 2013-03-15 09:14:05 +0800 | [diff] [blame] | 1383 | err_tpg: |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1384 | mutex_unlock(&tpg->tv_tpg_mutex); |
Asias He | 038e0af | 2013-03-15 09:14:05 +0800 | [diff] [blame] | 1385 | err_dev: |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1386 | mutex_unlock(&vs->dev.mutex); |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1387 | mutex_unlock(&vhost_scsi_mutex); |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1388 | return ret; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1389 | } |
| 1390 | |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1391 | static int vhost_scsi_set_features(struct vhost_scsi *vs, u64 features) |
| 1392 | { |
Michael S. Tsirkin | ea16c51 | 2014-06-05 15:20:23 +0300 | [diff] [blame] | 1393 | struct vhost_virtqueue *vq; |
| 1394 | int i; |
| 1395 | |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1396 | if (features & ~VHOST_SCSI_FEATURES) |
| 1397 | return -EOPNOTSUPP; |
| 1398 | |
| 1399 | mutex_lock(&vs->dev.mutex); |
| 1400 | if ((features & (1 << VHOST_F_LOG_ALL)) && |
| 1401 | !vhost_log_access_ok(&vs->dev)) { |
| 1402 | mutex_unlock(&vs->dev.mutex); |
| 1403 | return -EFAULT; |
| 1404 | } |
Michael S. Tsirkin | ea16c51 | 2014-06-05 15:20:23 +0300 | [diff] [blame] | 1405 | |
| 1406 | for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) { |
| 1407 | vq = &vs->vqs[i].vq; |
| 1408 | mutex_lock(&vq->mutex); |
| 1409 | vq->acked_features = features; |
| 1410 | mutex_unlock(&vq->mutex); |
| 1411 | } |
Asias He | 4f7f46d | 2013-04-03 14:17:37 +0800 | [diff] [blame] | 1412 | mutex_unlock(&vs->dev.mutex); |
| 1413 | return 0; |
| 1414 | } |
| 1415 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1416 | static int vhost_scsi_open(struct inode *inode, struct file *f) |
| 1417 | { |
Asias He | c728931 | 2013-05-06 16:38:26 +0800 | [diff] [blame] | 1418 | struct vhost_scsi *vs; |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1419 | struct vhost_virtqueue **vqs; |
Michael S. Tsirkin | 595cb75 | 2013-09-17 09:30:34 +0300 | [diff] [blame] | 1420 | int r = -ENOMEM, i; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1421 | |
Michael S. Tsirkin | 595cb75 | 2013-09-17 09:30:34 +0300 | [diff] [blame] | 1422 | vs = kzalloc(sizeof(*vs), GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT); |
| 1423 | if (!vs) { |
| 1424 | vs = vzalloc(sizeof(*vs)); |
| 1425 | if (!vs) |
| 1426 | goto err_vs; |
| 1427 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1428 | |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1429 | vqs = kmalloc(VHOST_SCSI_MAX_VQ * sizeof(*vqs), GFP_KERNEL); |
Michael S. Tsirkin | 595cb75 | 2013-09-17 09:30:34 +0300 | [diff] [blame] | 1430 | if (!vqs) |
| 1431 | goto err_vqs; |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1432 | |
Asias He | c728931 | 2013-05-06 16:38:26 +0800 | [diff] [blame] | 1433 | vhost_work_init(&vs->vs_completion_work, vhost_scsi_complete_cmd_work); |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1434 | vhost_work_init(&vs->vs_event_work, vhost_scsi_evt_work); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1435 | |
Asias He | c728931 | 2013-05-06 16:38:26 +0800 | [diff] [blame] | 1436 | vs->vs_events_nr = 0; |
| 1437 | vs->vs_events_missed = false; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1438 | |
Asias He | c728931 | 2013-05-06 16:38:26 +0800 | [diff] [blame] | 1439 | vqs[VHOST_SCSI_VQ_CTL] = &vs->vqs[VHOST_SCSI_VQ_CTL].vq; |
| 1440 | vqs[VHOST_SCSI_VQ_EVT] = &vs->vqs[VHOST_SCSI_VQ_EVT].vq; |
| 1441 | vs->vqs[VHOST_SCSI_VQ_CTL].vq.handle_kick = vhost_scsi_ctl_handle_kick; |
| 1442 | vs->vqs[VHOST_SCSI_VQ_EVT].vq.handle_kick = vhost_scsi_evt_handle_kick; |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1443 | for (i = VHOST_SCSI_VQ_IO; i < VHOST_SCSI_MAX_VQ; i++) { |
Asias He | c728931 | 2013-05-06 16:38:26 +0800 | [diff] [blame] | 1444 | vqs[i] = &vs->vqs[i].vq; |
| 1445 | vs->vqs[i].vq.handle_kick = vhost_scsi_handle_kick; |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1446 | } |
Zhi Yong Wu | 59566b6e | 2013-12-07 04:13:03 +0800 | [diff] [blame] | 1447 | vhost_dev_init(&vs->dev, vqs, VHOST_SCSI_MAX_VQ); |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 1448 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1449 | vhost_scsi_init_inflight(vs, NULL); |
Asias He | f2f0173d | 2013-04-27 11:16:49 +0800 | [diff] [blame] | 1450 | |
Asias He | c728931 | 2013-05-06 16:38:26 +0800 | [diff] [blame] | 1451 | f->private_data = vs; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1452 | return 0; |
Michael S. Tsirkin | 595cb75 | 2013-09-17 09:30:34 +0300 | [diff] [blame] | 1453 | |
Michael S. Tsirkin | 595cb75 | 2013-09-17 09:30:34 +0300 | [diff] [blame] | 1454 | err_vqs: |
Michael S. Tsirkin | 68404441 | 2014-06-12 19:00:01 +0300 | [diff] [blame] | 1455 | kvfree(vs); |
Michael S. Tsirkin | 595cb75 | 2013-09-17 09:30:34 +0300 | [diff] [blame] | 1456 | err_vs: |
| 1457 | return r; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1458 | } |
| 1459 | |
| 1460 | static int vhost_scsi_release(struct inode *inode, struct file *f) |
| 1461 | { |
Asias He | c728931 | 2013-05-06 16:38:26 +0800 | [diff] [blame] | 1462 | struct vhost_scsi *vs = f->private_data; |
Asias He | 67e18cf | 2013-02-05 12:31:57 +0800 | [diff] [blame] | 1463 | struct vhost_scsi_target t; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1464 | |
Asias He | c728931 | 2013-05-06 16:38:26 +0800 | [diff] [blame] | 1465 | mutex_lock(&vs->dev.mutex); |
| 1466 | memcpy(t.vhost_wwpn, vs->vs_vhost_wwpn, sizeof(t.vhost_wwpn)); |
| 1467 | mutex_unlock(&vs->dev.mutex); |
| 1468 | vhost_scsi_clear_endpoint(vs, &t); |
| 1469 | vhost_dev_stop(&vs->dev); |
| 1470 | vhost_dev_cleanup(&vs->dev, false); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1471 | /* Jobs can re-queue themselves in evt kick handler. Do extra flush. */ |
Asias He | c728931 | 2013-05-06 16:38:26 +0800 | [diff] [blame] | 1472 | vhost_scsi_flush(vs); |
| 1473 | kfree(vs->dev.vqs); |
Michael S. Tsirkin | 68404441 | 2014-06-12 19:00:01 +0300 | [diff] [blame] | 1474 | kvfree(vs); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1475 | return 0; |
| 1476 | } |
| 1477 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1478 | static long |
| 1479 | vhost_scsi_ioctl(struct file *f, |
| 1480 | unsigned int ioctl, |
| 1481 | unsigned long arg) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1482 | { |
| 1483 | struct vhost_scsi *vs = f->private_data; |
| 1484 | struct vhost_scsi_target backend; |
| 1485 | void __user *argp = (void __user *)arg; |
| 1486 | u64 __user *featurep = argp; |
Asias He | 11c63418 | 2013-04-25 15:35:22 +0800 | [diff] [blame] | 1487 | u32 __user *eventsp = argp; |
| 1488 | u32 events_missed; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1489 | u64 features; |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1490 | int r, abi_version = VHOST_SCSI_ABI_VERSION; |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1491 | struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1492 | |
| 1493 | switch (ioctl) { |
| 1494 | case VHOST_SCSI_SET_ENDPOINT: |
| 1495 | if (copy_from_user(&backend, argp, sizeof backend)) |
| 1496 | return -EFAULT; |
Michael S. Tsirkin | 6de7145 | 2012-08-18 15:44:09 -0700 | [diff] [blame] | 1497 | if (backend.reserved != 0) |
| 1498 | return -EOPNOTSUPP; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1499 | |
| 1500 | return vhost_scsi_set_endpoint(vs, &backend); |
| 1501 | case VHOST_SCSI_CLEAR_ENDPOINT: |
| 1502 | if (copy_from_user(&backend, argp, sizeof backend)) |
| 1503 | return -EFAULT; |
Michael S. Tsirkin | 6de7145 | 2012-08-18 15:44:09 -0700 | [diff] [blame] | 1504 | if (backend.reserved != 0) |
| 1505 | return -EOPNOTSUPP; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1506 | |
| 1507 | return vhost_scsi_clear_endpoint(vs, &backend); |
| 1508 | case VHOST_SCSI_GET_ABI_VERSION: |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1509 | if (copy_to_user(argp, &abi_version, sizeof abi_version)) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1510 | return -EFAULT; |
| 1511 | return 0; |
Asias He | 11c63418 | 2013-04-25 15:35:22 +0800 | [diff] [blame] | 1512 | case VHOST_SCSI_SET_EVENTS_MISSED: |
| 1513 | if (get_user(events_missed, eventsp)) |
| 1514 | return -EFAULT; |
| 1515 | mutex_lock(&vq->mutex); |
| 1516 | vs->vs_events_missed = events_missed; |
| 1517 | mutex_unlock(&vq->mutex); |
| 1518 | return 0; |
| 1519 | case VHOST_SCSI_GET_EVENTS_MISSED: |
| 1520 | mutex_lock(&vq->mutex); |
| 1521 | events_missed = vs->vs_events_missed; |
| 1522 | mutex_unlock(&vq->mutex); |
| 1523 | if (put_user(events_missed, eventsp)) |
| 1524 | return -EFAULT; |
| 1525 | return 0; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1526 | case VHOST_GET_FEATURES: |
Nicholas Bellinger | 5dade71 | 2013-03-27 17:23:41 -0700 | [diff] [blame] | 1527 | features = VHOST_SCSI_FEATURES; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1528 | if (copy_to_user(featurep, &features, sizeof features)) |
| 1529 | return -EFAULT; |
| 1530 | return 0; |
| 1531 | case VHOST_SET_FEATURES: |
| 1532 | if (copy_from_user(&features, featurep, sizeof features)) |
| 1533 | return -EFAULT; |
| 1534 | return vhost_scsi_set_features(vs, features); |
| 1535 | default: |
| 1536 | mutex_lock(&vs->dev.mutex); |
Michael S. Tsirkin | 935cdee | 2012-12-06 14:03:34 +0200 | [diff] [blame] | 1537 | r = vhost_dev_ioctl(&vs->dev, ioctl, argp); |
| 1538 | /* TODO: flush backend after dev ioctl. */ |
| 1539 | if (r == -ENOIOCTLCMD) |
| 1540 | r = vhost_vring_ioctl(&vs->dev, ioctl, argp); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1541 | mutex_unlock(&vs->dev.mutex); |
| 1542 | return r; |
| 1543 | } |
| 1544 | } |
| 1545 | |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1546 | #ifdef CONFIG_COMPAT |
| 1547 | static long vhost_scsi_compat_ioctl(struct file *f, unsigned int ioctl, |
| 1548 | unsigned long arg) |
| 1549 | { |
| 1550 | return vhost_scsi_ioctl(f, ioctl, (unsigned long)compat_ptr(arg)); |
| 1551 | } |
| 1552 | #endif |
| 1553 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1554 | static const struct file_operations vhost_scsi_fops = { |
| 1555 | .owner = THIS_MODULE, |
| 1556 | .release = vhost_scsi_release, |
| 1557 | .unlocked_ioctl = vhost_scsi_ioctl, |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1558 | #ifdef CONFIG_COMPAT |
| 1559 | .compat_ioctl = vhost_scsi_compat_ioctl, |
| 1560 | #endif |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1561 | .open = vhost_scsi_open, |
| 1562 | .llseek = noop_llseek, |
| 1563 | }; |
| 1564 | |
| 1565 | static struct miscdevice vhost_scsi_misc = { |
| 1566 | MISC_DYNAMIC_MINOR, |
| 1567 | "vhost-scsi", |
| 1568 | &vhost_scsi_fops, |
| 1569 | }; |
| 1570 | |
| 1571 | static int __init vhost_scsi_register(void) |
| 1572 | { |
| 1573 | return misc_register(&vhost_scsi_misc); |
| 1574 | } |
| 1575 | |
| 1576 | static int vhost_scsi_deregister(void) |
| 1577 | { |
| 1578 | return misc_deregister(&vhost_scsi_misc); |
| 1579 | } |
| 1580 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1581 | static char *vhost_scsi_dump_proto_id(struct vhost_scsi_tport *tport) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1582 | { |
| 1583 | switch (tport->tport_proto_id) { |
| 1584 | case SCSI_PROTOCOL_SAS: |
| 1585 | return "SAS"; |
| 1586 | case SCSI_PROTOCOL_FCP: |
| 1587 | return "FCP"; |
| 1588 | case SCSI_PROTOCOL_ISCSI: |
| 1589 | return "iSCSI"; |
| 1590 | default: |
| 1591 | break; |
| 1592 | } |
| 1593 | |
| 1594 | return "Unknown"; |
| 1595 | } |
| 1596 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1597 | static void |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1598 | vhost_scsi_do_plug(struct vhost_scsi_tpg *tpg, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1599 | struct se_lun *lun, bool plug) |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1600 | { |
| 1601 | |
| 1602 | struct vhost_scsi *vs = tpg->vhost_scsi; |
| 1603 | struct vhost_virtqueue *vq; |
| 1604 | u32 reason; |
| 1605 | |
| 1606 | if (!vs) |
| 1607 | return; |
| 1608 | |
| 1609 | mutex_lock(&vs->dev.mutex); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1610 | |
| 1611 | if (plug) |
| 1612 | reason = VIRTIO_SCSI_EVT_RESET_RESCAN; |
| 1613 | else |
| 1614 | reason = VIRTIO_SCSI_EVT_RESET_REMOVED; |
| 1615 | |
Asias He | 3ab2e42 | 2013-04-27 11:16:48 +0800 | [diff] [blame] | 1616 | vq = &vs->vqs[VHOST_SCSI_VQ_EVT].vq; |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1617 | mutex_lock(&vq->mutex); |
Michael S. Tsirkin | ea16c51 | 2014-06-05 15:20:23 +0300 | [diff] [blame] | 1618 | if (vhost_has_feature(vq, VIRTIO_SCSI_F_HOTPLUG)) |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1619 | vhost_scsi_send_evt(vs, tpg, lun, |
Michael S. Tsirkin | ea16c51 | 2014-06-05 15:20:23 +0300 | [diff] [blame] | 1620 | VIRTIO_SCSI_T_TRANSPORT_RESET, reason); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1621 | mutex_unlock(&vq->mutex); |
| 1622 | mutex_unlock(&vs->dev.mutex); |
| 1623 | } |
| 1624 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1625 | static void vhost_scsi_hotplug(struct vhost_scsi_tpg *tpg, struct se_lun *lun) |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1626 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1627 | vhost_scsi_do_plug(tpg, lun, true); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1628 | } |
| 1629 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1630 | static void vhost_scsi_hotunplug(struct vhost_scsi_tpg *tpg, struct se_lun *lun) |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1631 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1632 | vhost_scsi_do_plug(tpg, lun, false); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1633 | } |
| 1634 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1635 | static int vhost_scsi_port_link(struct se_portal_group *se_tpg, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1636 | struct se_lun *lun) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1637 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1638 | struct vhost_scsi_tpg *tpg = container_of(se_tpg, |
| 1639 | struct vhost_scsi_tpg, se_tpg); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1640 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1641 | mutex_lock(&vhost_scsi_mutex); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1642 | |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1643 | mutex_lock(&tpg->tv_tpg_mutex); |
| 1644 | tpg->tv_tpg_port_count++; |
| 1645 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1646 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1647 | vhost_scsi_hotplug(tpg, lun); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1648 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1649 | mutex_unlock(&vhost_scsi_mutex); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1650 | |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1651 | return 0; |
| 1652 | } |
| 1653 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1654 | static void vhost_scsi_port_unlink(struct se_portal_group *se_tpg, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1655 | struct se_lun *lun) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1656 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1657 | struct vhost_scsi_tpg *tpg = container_of(se_tpg, |
| 1658 | struct vhost_scsi_tpg, se_tpg); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1659 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1660 | mutex_lock(&vhost_scsi_mutex); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1661 | |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1662 | mutex_lock(&tpg->tv_tpg_mutex); |
| 1663 | tpg->tv_tpg_port_count--; |
| 1664 | mutex_unlock(&tpg->tv_tpg_mutex); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1665 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1666 | vhost_scsi_hotunplug(tpg, lun); |
Asias He | a6c9af8 | 2013-04-25 15:35:21 +0800 | [diff] [blame] | 1667 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1668 | mutex_unlock(&vhost_scsi_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1669 | } |
| 1670 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1671 | static void vhost_scsi_free_cmd_map_res(struct vhost_scsi_nexus *nexus, |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1672 | struct se_session *se_sess) |
| 1673 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1674 | struct vhost_scsi_cmd *tv_cmd; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1675 | unsigned int i; |
| 1676 | |
| 1677 | if (!se_sess->sess_cmd_map) |
| 1678 | return; |
| 1679 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1680 | for (i = 0; i < VHOST_SCSI_DEFAULT_TAGS; i++) { |
| 1681 | tv_cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[i]; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1682 | |
| 1683 | kfree(tv_cmd->tvc_sgl); |
Nicholas Bellinger | b1935f6 | 2014-02-22 18:08:24 -0800 | [diff] [blame] | 1684 | kfree(tv_cmd->tvc_prot_sgl); |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1685 | kfree(tv_cmd->tvc_upages); |
| 1686 | } |
| 1687 | } |
| 1688 | |
Nicholas Bellinger | b1d75fe | 2015-03-28 00:03:51 -0700 | [diff] [blame] | 1689 | static ssize_t vhost_scsi_tpg_attrib_store_fabric_prot_type( |
| 1690 | struct se_portal_group *se_tpg, |
| 1691 | const char *page, |
| 1692 | size_t count) |
| 1693 | { |
| 1694 | struct vhost_scsi_tpg *tpg = container_of(se_tpg, |
| 1695 | struct vhost_scsi_tpg, se_tpg); |
| 1696 | unsigned long val; |
| 1697 | int ret = kstrtoul(page, 0, &val); |
| 1698 | |
| 1699 | if (ret) { |
| 1700 | pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret); |
| 1701 | return ret; |
| 1702 | } |
| 1703 | if (val != 0 && val != 1 && val != 3) { |
| 1704 | pr_err("Invalid vhost_scsi fabric_prot_type: %lu\n", val); |
| 1705 | return -EINVAL; |
| 1706 | } |
| 1707 | tpg->tv_fabric_prot_type = val; |
| 1708 | |
| 1709 | return count; |
| 1710 | } |
| 1711 | |
| 1712 | static ssize_t vhost_scsi_tpg_attrib_show_fabric_prot_type( |
| 1713 | struct se_portal_group *se_tpg, |
| 1714 | char *page) |
| 1715 | { |
| 1716 | struct vhost_scsi_tpg *tpg = container_of(se_tpg, |
| 1717 | struct vhost_scsi_tpg, se_tpg); |
| 1718 | |
| 1719 | return sprintf(page, "%d\n", tpg->tv_fabric_prot_type); |
| 1720 | } |
| 1721 | TF_TPG_ATTRIB_ATTR(vhost_scsi, fabric_prot_type, S_IRUGO | S_IWUSR); |
| 1722 | |
| 1723 | static struct configfs_attribute *vhost_scsi_tpg_attrib_attrs[] = { |
| 1724 | &vhost_scsi_tpg_attrib_fabric_prot_type.attr, |
| 1725 | NULL, |
| 1726 | }; |
| 1727 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1728 | static int vhost_scsi_make_nexus(struct vhost_scsi_tpg *tpg, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1729 | const char *name) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1730 | { |
| 1731 | struct se_portal_group *se_tpg; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1732 | struct se_session *se_sess; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1733 | struct vhost_scsi_nexus *tv_nexus; |
| 1734 | struct vhost_scsi_cmd *tv_cmd; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1735 | unsigned int i; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1736 | |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1737 | mutex_lock(&tpg->tv_tpg_mutex); |
| 1738 | if (tpg->tpg_nexus) { |
| 1739 | mutex_unlock(&tpg->tv_tpg_mutex); |
| 1740 | pr_debug("tpg->tpg_nexus already exists\n"); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1741 | return -EEXIST; |
| 1742 | } |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1743 | se_tpg = &tpg->se_tpg; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1744 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1745 | tv_nexus = kzalloc(sizeof(struct vhost_scsi_nexus), GFP_KERNEL); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1746 | if (!tv_nexus) { |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1747 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1748 | pr_err("Unable to allocate struct vhost_scsi_nexus\n"); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1749 | return -ENOMEM; |
| 1750 | } |
| 1751 | /* |
Nicholas Bellinger | 4824d3b | 2013-06-07 17:47:46 -0700 | [diff] [blame] | 1752 | * Initialize the struct se_session pointer and setup tagpool |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1753 | * for struct vhost_scsi_cmd descriptors |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1754 | */ |
Nicholas Bellinger | 4824d3b | 2013-06-07 17:47:46 -0700 | [diff] [blame] | 1755 | tv_nexus->tvn_se_sess = transport_init_session_tags( |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1756 | VHOST_SCSI_DEFAULT_TAGS, |
| 1757 | sizeof(struct vhost_scsi_cmd), |
Nicholas Bellinger | 95e7c43 | 2014-02-22 18:22:31 -0800 | [diff] [blame] | 1758 | TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1759 | if (IS_ERR(tv_nexus->tvn_se_sess)) { |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1760 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1761 | kfree(tv_nexus); |
| 1762 | return -ENOMEM; |
| 1763 | } |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1764 | se_sess = tv_nexus->tvn_se_sess; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1765 | for (i = 0; i < VHOST_SCSI_DEFAULT_TAGS; i++) { |
| 1766 | tv_cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[i]; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1767 | |
| 1768 | tv_cmd->tvc_sgl = kzalloc(sizeof(struct scatterlist) * |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1769 | VHOST_SCSI_PREALLOC_SGLS, GFP_KERNEL); |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1770 | if (!tv_cmd->tvc_sgl) { |
| 1771 | mutex_unlock(&tpg->tv_tpg_mutex); |
| 1772 | pr_err("Unable to allocate tv_cmd->tvc_sgl\n"); |
| 1773 | goto out; |
| 1774 | } |
| 1775 | |
| 1776 | tv_cmd->tvc_upages = kzalloc(sizeof(struct page *) * |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1777 | VHOST_SCSI_PREALLOC_UPAGES, GFP_KERNEL); |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1778 | if (!tv_cmd->tvc_upages) { |
| 1779 | mutex_unlock(&tpg->tv_tpg_mutex); |
| 1780 | pr_err("Unable to allocate tv_cmd->tvc_upages\n"); |
| 1781 | goto out; |
| 1782 | } |
Nicholas Bellinger | b1935f6 | 2014-02-22 18:08:24 -0800 | [diff] [blame] | 1783 | |
| 1784 | tv_cmd->tvc_prot_sgl = kzalloc(sizeof(struct scatterlist) * |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1785 | VHOST_SCSI_PREALLOC_PROT_SGLS, GFP_KERNEL); |
Nicholas Bellinger | b1935f6 | 2014-02-22 18:08:24 -0800 | [diff] [blame] | 1786 | if (!tv_cmd->tvc_prot_sgl) { |
| 1787 | mutex_unlock(&tpg->tv_tpg_mutex); |
| 1788 | pr_err("Unable to allocate tv_cmd->tvc_prot_sgl\n"); |
| 1789 | goto out; |
| 1790 | } |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1791 | } |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1792 | /* |
| 1793 | * Since we are running in 'demo mode' this call with generate a |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1794 | * struct se_node_acl for the vhost_scsi struct se_portal_group with |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1795 | * the SCSI Initiator port name of the passed configfs group 'name'. |
| 1796 | */ |
| 1797 | tv_nexus->tvn_se_sess->se_node_acl = core_tpg_check_initiator_node_acl( |
| 1798 | se_tpg, (unsigned char *)name); |
| 1799 | if (!tv_nexus->tvn_se_sess->se_node_acl) { |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1800 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1801 | pr_debug("core_tpg_check_initiator_node_acl() failed" |
| 1802 | " for %s\n", name); |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1803 | goto out; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1804 | } |
| 1805 | /* |
Bart Van Assche | 2f450cc | 2015-02-12 11:48:49 +0100 | [diff] [blame] | 1806 | * Now register the TCM vhost virtual I_T Nexus as active. |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1807 | */ |
Bart Van Assche | 2f450cc | 2015-02-12 11:48:49 +0100 | [diff] [blame] | 1808 | transport_register_session(se_tpg, tv_nexus->tvn_se_sess->se_node_acl, |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1809 | tv_nexus->tvn_se_sess, tv_nexus); |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1810 | tpg->tpg_nexus = tv_nexus; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1811 | |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1812 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1813 | return 0; |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1814 | |
| 1815 | out: |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1816 | vhost_scsi_free_cmd_map_res(tv_nexus, se_sess); |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1817 | transport_free_session(se_sess); |
| 1818 | kfree(tv_nexus); |
| 1819 | return -ENOMEM; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1820 | } |
| 1821 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1822 | static int vhost_scsi_drop_nexus(struct vhost_scsi_tpg *tpg) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1823 | { |
| 1824 | struct se_session *se_sess; |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1825 | struct vhost_scsi_nexus *tv_nexus; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1826 | |
| 1827 | mutex_lock(&tpg->tv_tpg_mutex); |
| 1828 | tv_nexus = tpg->tpg_nexus; |
| 1829 | if (!tv_nexus) { |
| 1830 | mutex_unlock(&tpg->tv_tpg_mutex); |
| 1831 | return -ENODEV; |
| 1832 | } |
| 1833 | |
| 1834 | se_sess = tv_nexus->tvn_se_sess; |
| 1835 | if (!se_sess) { |
| 1836 | mutex_unlock(&tpg->tv_tpg_mutex); |
| 1837 | return -ENODEV; |
| 1838 | } |
| 1839 | |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1840 | if (tpg->tv_tpg_port_count != 0) { |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1841 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1842 | pr_err("Unable to remove TCM_vhost I_T Nexus with" |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1843 | " active TPG port count: %d\n", |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1844 | tpg->tv_tpg_port_count); |
| 1845 | return -EBUSY; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1846 | } |
| 1847 | |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1848 | if (tpg->tv_tpg_vhost_count != 0) { |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1849 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1850 | pr_err("Unable to remove TCM_vhost I_T Nexus with" |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1851 | " active TPG vhost count: %d\n", |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1852 | tpg->tv_tpg_vhost_count); |
| 1853 | return -EBUSY; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1854 | } |
| 1855 | |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1856 | pr_debug("TCM_vhost_ConfigFS: Removing I_T Nexus to emulated" |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1857 | " %s Initiator Port: %s\n", vhost_scsi_dump_proto_id(tpg->tport), |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1858 | tv_nexus->tvn_se_sess->se_node_acl->initiatorname); |
Nicholas Bellinger | 3aee26b | 2013-06-21 14:32:04 -0700 | [diff] [blame] | 1859 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1860 | vhost_scsi_free_cmd_map_res(tv_nexus, se_sess); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1861 | /* |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 1862 | * Release the SCSI I_T Nexus to the emulated vhost Target Port |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1863 | */ |
| 1864 | transport_deregister_session(tv_nexus->tvn_se_sess); |
| 1865 | tpg->tpg_nexus = NULL; |
| 1866 | mutex_unlock(&tpg->tv_tpg_mutex); |
| 1867 | |
| 1868 | kfree(tv_nexus); |
| 1869 | return 0; |
| 1870 | } |
| 1871 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1872 | static ssize_t vhost_scsi_tpg_show_nexus(struct se_portal_group *se_tpg, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1873 | char *page) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1874 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1875 | struct vhost_scsi_tpg *tpg = container_of(se_tpg, |
| 1876 | struct vhost_scsi_tpg, se_tpg); |
| 1877 | struct vhost_scsi_nexus *tv_nexus; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1878 | ssize_t ret; |
| 1879 | |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1880 | mutex_lock(&tpg->tv_tpg_mutex); |
| 1881 | tv_nexus = tpg->tpg_nexus; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1882 | if (!tv_nexus) { |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1883 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1884 | return -ENODEV; |
| 1885 | } |
| 1886 | ret = snprintf(page, PAGE_SIZE, "%s\n", |
| 1887 | tv_nexus->tvn_se_sess->se_node_acl->initiatorname); |
Asias He | 9871831 | 2013-05-06 16:38:28 +0800 | [diff] [blame] | 1888 | mutex_unlock(&tpg->tv_tpg_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1889 | |
| 1890 | return ret; |
| 1891 | } |
| 1892 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1893 | static ssize_t vhost_scsi_tpg_store_nexus(struct se_portal_group *se_tpg, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1894 | const char *page, |
| 1895 | size_t count) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1896 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1897 | struct vhost_scsi_tpg *tpg = container_of(se_tpg, |
| 1898 | struct vhost_scsi_tpg, se_tpg); |
| 1899 | struct vhost_scsi_tport *tport_wwn = tpg->tport; |
| 1900 | unsigned char i_port[VHOST_SCSI_NAMELEN], *ptr, *port_ptr; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1901 | int ret; |
| 1902 | /* |
| 1903 | * Shutdown the active I_T nexus if 'NULL' is passed.. |
| 1904 | */ |
| 1905 | if (!strncmp(page, "NULL", 4)) { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1906 | ret = vhost_scsi_drop_nexus(tpg); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1907 | return (!ret) ? count : ret; |
| 1908 | } |
| 1909 | /* |
| 1910 | * Otherwise make sure the passed virtual Initiator port WWN matches |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1911 | * the fabric protocol_id set in vhost_scsi_make_tport(), and call |
| 1912 | * vhost_scsi_make_nexus(). |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1913 | */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1914 | if (strlen(page) >= VHOST_SCSI_NAMELEN) { |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1915 | pr_err("Emulated NAA Sas Address: %s, exceeds" |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1916 | " max: %d\n", page, VHOST_SCSI_NAMELEN); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1917 | return -EINVAL; |
| 1918 | } |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1919 | snprintf(&i_port[0], VHOST_SCSI_NAMELEN, "%s", page); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1920 | |
| 1921 | ptr = strstr(i_port, "naa."); |
| 1922 | if (ptr) { |
| 1923 | if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_SAS) { |
| 1924 | pr_err("Passed SAS Initiator Port %s does not" |
| 1925 | " match target port protoid: %s\n", i_port, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1926 | vhost_scsi_dump_proto_id(tport_wwn)); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1927 | return -EINVAL; |
| 1928 | } |
| 1929 | port_ptr = &i_port[0]; |
| 1930 | goto check_newline; |
| 1931 | } |
| 1932 | ptr = strstr(i_port, "fc."); |
| 1933 | if (ptr) { |
| 1934 | if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_FCP) { |
| 1935 | pr_err("Passed FCP Initiator Port %s does not" |
| 1936 | " match target port protoid: %s\n", i_port, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1937 | vhost_scsi_dump_proto_id(tport_wwn)); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1938 | return -EINVAL; |
| 1939 | } |
| 1940 | port_ptr = &i_port[3]; /* Skip over "fc." */ |
| 1941 | goto check_newline; |
| 1942 | } |
| 1943 | ptr = strstr(i_port, "iqn."); |
| 1944 | if (ptr) { |
| 1945 | if (tport_wwn->tport_proto_id != SCSI_PROTOCOL_ISCSI) { |
| 1946 | pr_err("Passed iSCSI Initiator Port %s does not" |
| 1947 | " match target port protoid: %s\n", i_port, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1948 | vhost_scsi_dump_proto_id(tport_wwn)); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1949 | return -EINVAL; |
| 1950 | } |
| 1951 | port_ptr = &i_port[0]; |
| 1952 | goto check_newline; |
| 1953 | } |
| 1954 | pr_err("Unable to locate prefix for emulated Initiator Port:" |
| 1955 | " %s\n", i_port); |
| 1956 | return -EINVAL; |
| 1957 | /* |
| 1958 | * Clear any trailing newline for the NAA WWN |
| 1959 | */ |
| 1960 | check_newline: |
| 1961 | if (i_port[strlen(i_port)-1] == '\n') |
| 1962 | i_port[strlen(i_port)-1] = '\0'; |
| 1963 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1964 | ret = vhost_scsi_make_nexus(tpg, port_ptr); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1965 | if (ret < 0) |
| 1966 | return ret; |
| 1967 | |
| 1968 | return count; |
| 1969 | } |
| 1970 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1971 | TF_TPG_BASE_ATTR(vhost_scsi, nexus, S_IRUGO | S_IWUSR); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1972 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1973 | static struct configfs_attribute *vhost_scsi_tpg_attrs[] = { |
| 1974 | &vhost_scsi_tpg_nexus.attr, |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1975 | NULL, |
| 1976 | }; |
| 1977 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1978 | static struct se_portal_group * |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1979 | vhost_scsi_make_tpg(struct se_wwn *wwn, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 1980 | struct config_group *group, |
| 1981 | const char *name) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1982 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1983 | struct vhost_scsi_tport *tport = container_of(wwn, |
| 1984 | struct vhost_scsi_tport, tport_wwn); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1985 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1986 | struct vhost_scsi_tpg *tpg; |
Dan Carpenter | 59c816c | 2015-02-05 10:37:33 +0300 | [diff] [blame] | 1987 | u16 tpgt; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1988 | int ret; |
| 1989 | |
| 1990 | if (strstr(name, "tpgt_") != name) |
| 1991 | return ERR_PTR(-EINVAL); |
Dan Carpenter | 59c816c | 2015-02-05 10:37:33 +0300 | [diff] [blame] | 1992 | if (kstrtou16(name + 5, 10, &tpgt) || tpgt >= VHOST_SCSI_MAX_TARGET) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1993 | return ERR_PTR(-EINVAL); |
| 1994 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1995 | tpg = kzalloc(sizeof(struct vhost_scsi_tpg), GFP_KERNEL); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1996 | if (!tpg) { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 1997 | pr_err("Unable to allocate struct vhost_scsi_tpg"); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 1998 | return ERR_PTR(-ENOMEM); |
| 1999 | } |
| 2000 | mutex_init(&tpg->tv_tpg_mutex); |
| 2001 | INIT_LIST_HEAD(&tpg->tv_tpg_list); |
| 2002 | tpg->tport = tport; |
| 2003 | tpg->tport_tpgt = tpgt; |
| 2004 | |
Christoph Hellwig | e4aae5a | 2015-05-01 17:47:56 +0200 | [diff] [blame] | 2005 | ret = core_tpg_register(&vhost_scsi_ops, wwn, &tpg->se_tpg, |
| 2006 | tport->tport_proto_id); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2007 | if (ret < 0) { |
| 2008 | kfree(tpg); |
| 2009 | return NULL; |
| 2010 | } |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2011 | mutex_lock(&vhost_scsi_mutex); |
| 2012 | list_add_tail(&tpg->tv_tpg_list, &vhost_scsi_list); |
| 2013 | mutex_unlock(&vhost_scsi_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2014 | |
| 2015 | return &tpg->se_tpg; |
| 2016 | } |
| 2017 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2018 | static void vhost_scsi_drop_tpg(struct se_portal_group *se_tpg) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2019 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2020 | struct vhost_scsi_tpg *tpg = container_of(se_tpg, |
| 2021 | struct vhost_scsi_tpg, se_tpg); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2022 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2023 | mutex_lock(&vhost_scsi_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2024 | list_del(&tpg->tv_tpg_list); |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2025 | mutex_unlock(&vhost_scsi_mutex); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2026 | /* |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 2027 | * Release the virtual I_T Nexus for this vhost TPG |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2028 | */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2029 | vhost_scsi_drop_nexus(tpg); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2030 | /* |
| 2031 | * Deregister the se_tpg from TCM.. |
| 2032 | */ |
| 2033 | core_tpg_deregister(se_tpg); |
| 2034 | kfree(tpg); |
| 2035 | } |
| 2036 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 2037 | static struct se_wwn * |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2038 | vhost_scsi_make_tport(struct target_fabric_configfs *tf, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 2039 | struct config_group *group, |
| 2040 | const char *name) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2041 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2042 | struct vhost_scsi_tport *tport; |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2043 | char *ptr; |
| 2044 | u64 wwpn = 0; |
| 2045 | int off = 0; |
| 2046 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2047 | /* if (vhost_scsi_parse_wwn(name, &wwpn, 1) < 0) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2048 | return ERR_PTR(-EINVAL); */ |
| 2049 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2050 | tport = kzalloc(sizeof(struct vhost_scsi_tport), GFP_KERNEL); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2051 | if (!tport) { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2052 | pr_err("Unable to allocate struct vhost_scsi_tport"); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2053 | return ERR_PTR(-ENOMEM); |
| 2054 | } |
| 2055 | tport->tport_wwpn = wwpn; |
| 2056 | /* |
| 2057 | * Determine the emulated Protocol Identifier and Target Port Name |
| 2058 | * based on the incoming configfs directory name. |
| 2059 | */ |
| 2060 | ptr = strstr(name, "naa."); |
| 2061 | if (ptr) { |
| 2062 | tport->tport_proto_id = SCSI_PROTOCOL_SAS; |
| 2063 | goto check_len; |
| 2064 | } |
| 2065 | ptr = strstr(name, "fc."); |
| 2066 | if (ptr) { |
| 2067 | tport->tport_proto_id = SCSI_PROTOCOL_FCP; |
| 2068 | off = 3; /* Skip over "fc." */ |
| 2069 | goto check_len; |
| 2070 | } |
| 2071 | ptr = strstr(name, "iqn."); |
| 2072 | if (ptr) { |
| 2073 | tport->tport_proto_id = SCSI_PROTOCOL_ISCSI; |
| 2074 | goto check_len; |
| 2075 | } |
| 2076 | |
| 2077 | pr_err("Unable to locate prefix for emulated Target Port:" |
| 2078 | " %s\n", name); |
| 2079 | kfree(tport); |
| 2080 | return ERR_PTR(-EINVAL); |
| 2081 | |
| 2082 | check_len: |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2083 | if (strlen(name) >= VHOST_SCSI_NAMELEN) { |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2084 | pr_err("Emulated %s Address: %s, exceeds" |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2085 | " max: %d\n", name, vhost_scsi_dump_proto_id(tport), |
| 2086 | VHOST_SCSI_NAMELEN); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2087 | kfree(tport); |
| 2088 | return ERR_PTR(-EINVAL); |
| 2089 | } |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2090 | snprintf(&tport->tport_name[0], VHOST_SCSI_NAMELEN, "%s", &name[off]); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2091 | |
| 2092 | pr_debug("TCM_VHost_ConfigFS: Allocated emulated Target" |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2093 | " %s Address: %s\n", vhost_scsi_dump_proto_id(tport), name); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2094 | |
| 2095 | return &tport->tport_wwn; |
| 2096 | } |
| 2097 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2098 | static void vhost_scsi_drop_tport(struct se_wwn *wwn) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2099 | { |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2100 | struct vhost_scsi_tport *tport = container_of(wwn, |
| 2101 | struct vhost_scsi_tport, tport_wwn); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2102 | |
| 2103 | pr_debug("TCM_VHost_ConfigFS: Deallocating emulated Target" |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2104 | " %s Address: %s\n", vhost_scsi_dump_proto_id(tport), |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2105 | tport->tport_name); |
| 2106 | |
| 2107 | kfree(tport); |
| 2108 | } |
| 2109 | |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 2110 | static ssize_t |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2111 | vhost_scsi_wwn_show_attr_version(struct target_fabric_configfs *tf, |
Asias He | 683bd96 | 2013-05-06 16:38:27 +0800 | [diff] [blame] | 2112 | char *page) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2113 | { |
| 2114 | return sprintf(page, "TCM_VHOST fabric module %s on %s/%s" |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2115 | "on "UTS_RELEASE"\n", VHOST_SCSI_VERSION, utsname()->sysname, |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2116 | utsname()->machine); |
| 2117 | } |
| 2118 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2119 | TF_WWN_ATTR_RO(vhost_scsi, version); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2120 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2121 | static struct configfs_attribute *vhost_scsi_wwn_attrs[] = { |
| 2122 | &vhost_scsi_wwn_version.attr, |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2123 | NULL, |
| 2124 | }; |
| 2125 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2126 | static struct target_core_fabric_ops vhost_scsi_ops = { |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 2127 | .module = THIS_MODULE, |
| 2128 | .name = "vhost", |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2129 | .get_fabric_name = vhost_scsi_get_fabric_name, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2130 | .tpg_get_wwn = vhost_scsi_get_fabric_wwn, |
| 2131 | .tpg_get_tag = vhost_scsi_get_tpgt, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2132 | .tpg_check_demo_mode = vhost_scsi_check_true, |
| 2133 | .tpg_check_demo_mode_cache = vhost_scsi_check_true, |
| 2134 | .tpg_check_demo_mode_write_protect = vhost_scsi_check_false, |
| 2135 | .tpg_check_prod_mode_write_protect = vhost_scsi_check_false, |
Nicholas Bellinger | b1d75fe | 2015-03-28 00:03:51 -0700 | [diff] [blame] | 2136 | .tpg_check_prot_fabric_only = vhost_scsi_check_prot_fabric_only, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2137 | .tpg_get_inst_index = vhost_scsi_tpg_get_inst_index, |
| 2138 | .release_cmd = vhost_scsi_release_cmd, |
Nicholas Bellinger | 084ed45 | 2013-06-06 02:20:41 -0700 | [diff] [blame] | 2139 | .check_stop_free = vhost_scsi_check_stop_free, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2140 | .shutdown_session = vhost_scsi_shutdown_session, |
| 2141 | .close_session = vhost_scsi_close_session, |
| 2142 | .sess_get_index = vhost_scsi_sess_get_index, |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2143 | .sess_get_initiator_sid = NULL, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2144 | .write_pending = vhost_scsi_write_pending, |
| 2145 | .write_pending_status = vhost_scsi_write_pending_status, |
| 2146 | .set_default_node_attributes = vhost_scsi_set_default_node_attrs, |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2147 | .get_cmd_state = vhost_scsi_get_cmd_state, |
| 2148 | .queue_data_in = vhost_scsi_queue_data_in, |
| 2149 | .queue_status = vhost_scsi_queue_status, |
| 2150 | .queue_tm_rsp = vhost_scsi_queue_tm_rsp, |
| 2151 | .aborted_task = vhost_scsi_aborted_task, |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2152 | /* |
| 2153 | * Setup callers for generic logic in target_core_fabric_configfs.c |
| 2154 | */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2155 | .fabric_make_wwn = vhost_scsi_make_tport, |
| 2156 | .fabric_drop_wwn = vhost_scsi_drop_tport, |
| 2157 | .fabric_make_tpg = vhost_scsi_make_tpg, |
| 2158 | .fabric_drop_tpg = vhost_scsi_drop_tpg, |
| 2159 | .fabric_post_link = vhost_scsi_port_link, |
| 2160 | .fabric_pre_unlink = vhost_scsi_port_unlink, |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2161 | |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 2162 | .tfc_wwn_attrs = vhost_scsi_wwn_attrs, |
| 2163 | .tfc_tpg_base_attrs = vhost_scsi_tpg_attrs, |
| 2164 | .tfc_tpg_attrib_attrs = vhost_scsi_tpg_attrib_attrs, |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2165 | }; |
| 2166 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2167 | static int __init vhost_scsi_init(void) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2168 | { |
| 2169 | int ret = -ENOMEM; |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 2170 | |
| 2171 | pr_debug("TCM_VHOST fabric module %s on %s/%s" |
| 2172 | " on "UTS_RELEASE"\n", VHOST_SCSI_VERSION, utsname()->sysname, |
| 2173 | utsname()->machine); |
| 2174 | |
Nicholas Bellinger | 101998f | 2012-07-30 13:30:00 -0700 | [diff] [blame] | 2175 | /* |
| 2176 | * Use our own dedicated workqueue for submitting I/O into |
| 2177 | * target core to avoid contention within system_wq. |
| 2178 | */ |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2179 | vhost_scsi_workqueue = alloc_workqueue("vhost_scsi", 0, 0); |
| 2180 | if (!vhost_scsi_workqueue) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2181 | goto out; |
| 2182 | |
| 2183 | ret = vhost_scsi_register(); |
| 2184 | if (ret < 0) |
| 2185 | goto out_destroy_workqueue; |
| 2186 | |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 2187 | ret = target_register_template(&vhost_scsi_ops); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2188 | if (ret < 0) |
| 2189 | goto out_vhost_scsi_deregister; |
| 2190 | |
| 2191 | return 0; |
| 2192 | |
| 2193 | out_vhost_scsi_deregister: |
| 2194 | vhost_scsi_deregister(); |
| 2195 | out_destroy_workqueue: |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2196 | destroy_workqueue(vhost_scsi_workqueue); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2197 | out: |
| 2198 | return ret; |
| 2199 | }; |
| 2200 | |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2201 | static void vhost_scsi_exit(void) |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2202 | { |
Christoph Hellwig | 9ac8928 | 2015-04-08 20:01:35 +0200 | [diff] [blame] | 2203 | target_unregister_template(&vhost_scsi_ops); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2204 | vhost_scsi_deregister(); |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2205 | destroy_workqueue(vhost_scsi_workqueue); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2206 | }; |
| 2207 | |
Michael S. Tsirkin | 181c04a | 2013-05-02 03:52:59 +0300 | [diff] [blame] | 2208 | MODULE_DESCRIPTION("VHOST_SCSI series fabric driver"); |
| 2209 | MODULE_ALIAS("tcm_vhost"); |
Nicholas Bellinger | 057cbf4 | 2012-07-18 14:31:32 -0700 | [diff] [blame] | 2210 | MODULE_LICENSE("GPL"); |
Nicholas Bellinger | 1a1ff82 | 2015-01-31 23:56:53 -0800 | [diff] [blame] | 2211 | module_init(vhost_scsi_init); |
| 2212 | module_exit(vhost_scsi_exit); |